| 1 | /* $NetBSD: sdmmc_io.c,v 1.12 2015/10/06 14:32:51 mlelstv 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@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 1.12 2015/10/06 14:32:51 mlelstv 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 | SCF_TOUT_OK; |
| 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 | mutex_enter(&sc->sc_intr_task_mtx); |
| 601 | reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); |
| 602 | reg |= 1 << sf->number; |
| 603 | sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); |
| 604 | mutex_exit(&sc->sc_intr_task_mtx); |
| 605 | SDMMC_UNLOCK(sc); |
| 606 | } |
| 607 | |
| 608 | void |
| 609 | sdmmc_intr_disable(struct sdmmc_function *sf) |
| 610 | { |
| 611 | struct sdmmc_softc *sc = sf->sc; |
| 612 | struct sdmmc_function *sf0 = sc->sc_fn0; |
| 613 | uint8_t reg; |
| 614 | |
| 615 | SDMMC_LOCK(sc); |
| 616 | mutex_enter(&sc->sc_intr_task_mtx); |
| 617 | reg = sdmmc_io_read_1(sf0, SD_IO_CCCR_FN_INTEN); |
| 618 | reg &= ~(1 << sf->number); |
| 619 | sdmmc_io_write_1(sf0, SD_IO_CCCR_FN_INTEN, reg); |
| 620 | mutex_exit(&sc->sc_intr_task_mtx); |
| 621 | SDMMC_UNLOCK(sc); |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Establish a handler for the SDIO card interrupt. Because the |
| 626 | * interrupt may be shared with different SDIO functions, multiple |
| 627 | * handlers can be established. |
| 628 | */ |
| 629 | void * |
| 630 | sdmmc_intr_establish(device_t dev, int (*fun)(void *), void *arg, |
| 631 | const char *name) |
| 632 | { |
| 633 | struct sdmmc_softc *sc = device_private(dev); |
| 634 | struct sdmmc_intr_handler *ih; |
| 635 | |
| 636 | if (sc->sc_sct->card_enable_intr == NULL) |
| 637 | return NULL; |
| 638 | |
| 639 | ih = malloc(sizeof *ih, M_DEVBUF, M_WAITOK|M_CANFAIL|M_ZERO); |
| 640 | if (ih == NULL) |
| 641 | return NULL; |
| 642 | |
| 643 | ih->ih_name = malloc(strlen(name) + 1, M_DEVBUF, |
| 644 | M_WAITOK|M_CANFAIL|M_ZERO); |
| 645 | if (ih->ih_name == NULL) { |
| 646 | free(ih, M_DEVBUF); |
| 647 | return NULL; |
| 648 | } |
| 649 | strlcpy(ih->ih_name, name, strlen(name)); |
| 650 | ih->ih_softc = sc; |
| 651 | ih->ih_fun = fun; |
| 652 | ih->ih_arg = arg; |
| 653 | |
| 654 | mutex_enter(&sc->sc_mtx); |
| 655 | if (TAILQ_EMPTY(&sc->sc_intrq)) { |
| 656 | sdmmc_intr_enable(sc->sc_fn0); |
| 657 | sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 1); |
| 658 | } |
| 659 | TAILQ_INSERT_TAIL(&sc->sc_intrq, ih, entry); |
| 660 | mutex_exit(&sc->sc_mtx); |
| 661 | |
| 662 | return ih; |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Disestablish the given handler. |
| 667 | */ |
| 668 | void |
| 669 | sdmmc_intr_disestablish(void *cookie) |
| 670 | { |
| 671 | struct sdmmc_intr_handler *ih = cookie; |
| 672 | struct sdmmc_softc *sc = ih->ih_softc; |
| 673 | |
| 674 | if (sc->sc_sct->card_enable_intr == NULL) |
| 675 | return; |
| 676 | |
| 677 | mutex_enter(&sc->sc_mtx); |
| 678 | TAILQ_REMOVE(&sc->sc_intrq, ih, entry); |
| 679 | if (TAILQ_EMPTY(&sc->sc_intrq)) { |
| 680 | sdmmc_chip_card_enable_intr(sc->sc_sct, sc->sc_sch, 0); |
| 681 | sdmmc_intr_disable(sc->sc_fn0); |
| 682 | } |
| 683 | mutex_exit(&sc->sc_mtx); |
| 684 | |
| 685 | free(ih->ih_name, M_DEVBUF); |
| 686 | free(ih, M_DEVBUF); |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * Call established SDIO card interrupt handlers. The host controller |
| 691 | * must call this function from its own interrupt handler to handle an |
| 692 | * SDIO interrupt from the card. |
| 693 | */ |
| 694 | void |
| 695 | sdmmc_card_intr(device_t dev) |
| 696 | { |
| 697 | struct sdmmc_softc *sc = device_private(dev); |
| 698 | |
| 699 | if (sc->sc_sct->card_enable_intr == NULL) |
| 700 | return; |
| 701 | |
| 702 | mutex_enter(&sc->sc_intr_task_mtx); |
| 703 | if (!sdmmc_task_pending(&sc->sc_intr_task)) |
| 704 | sdmmc_add_task(sc, &sc->sc_intr_task); |
| 705 | mutex_exit(&sc->sc_intr_task_mtx); |
| 706 | } |
| 707 | |
| 708 | void |
| 709 | sdmmc_intr_task(void *arg) |
| 710 | { |
| 711 | struct sdmmc_softc *sc = (struct sdmmc_softc *)arg; |
| 712 | struct sdmmc_intr_handler *ih; |
| 713 | |
| 714 | mutex_enter(&sc->sc_mtx); |
| 715 | TAILQ_FOREACH(ih, &sc->sc_intrq, entry) { |
| 716 | /* XXX examine return value and do evcount stuff*/ |
| 717 | (void)(*ih->ih_fun)(ih->ih_arg); |
| 718 | } |
| 719 | mutex_exit(&sc->sc_mtx); |
| 720 | |
| 721 | sdmmc_chip_card_intr_ack(sc->sc_sct, sc->sc_sch); |
| 722 | } |
| 723 | |