sdhc.c revision 1.116
1 /* $NetBSD: sdhc.c,v 1.116 2022/10/14 07:54:49 jmcneill Exp $ */ 2 /* $OpenBSD: sdhc.c,v 1.25 2009/01/13 19:44:20 grange 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 * SD Host Controller driver based on the SD Host Controller Standard 22 * Simplified Specification Version 1.00 (www.sdcard.com). 23 */ 24 25 #include <sys/cdefs.h> 26 __KERNEL_RCSID(0, "$NetBSD: sdhc.c,v 1.116 2022/10/14 07:54:49 jmcneill Exp $"); 27 28 #ifdef _KERNEL_OPT 29 #include "opt_sdmmc.h" 30 #endif 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 #include <sys/systm.h> 37 #include <sys/mutex.h> 38 #include <sys/condvar.h> 39 #include <sys/atomic.h> 40 41 #include <dev/sdmmc/sdhcreg.h> 42 #include <dev/sdmmc/sdhcvar.h> 43 #include <dev/sdmmc/sdmmcchip.h> 44 #include <dev/sdmmc/sdmmcreg.h> 45 #include <dev/sdmmc/sdmmcvar.h> 46 47 #ifdef SDHC_DEBUG 48 int sdhcdebug = 1; 49 #define DPRINTF(n,s) do { if ((n) <= sdhcdebug) printf s; } while (0) 50 void sdhc_dump_regs(struct sdhc_host *); 51 #else 52 #define DPRINTF(n,s) do {} while (0) 53 #endif 54 55 #define SDHC_COMMAND_TIMEOUT hz 56 #define SDHC_BUFFER_TIMEOUT hz 57 #define SDHC_TRANSFER_TIMEOUT hz 58 #define SDHC_DMA_TIMEOUT (hz*3) 59 #define SDHC_TUNING_TIMEOUT hz 60 61 struct sdhc_host { 62 struct sdhc_softc *sc; /* host controller device */ 63 64 bus_space_tag_t iot; /* host register set tag */ 65 bus_space_handle_t ioh; /* host register set handle */ 66 bus_size_t ios; /* host register space size */ 67 bus_dma_tag_t dmat; /* host DMA tag */ 68 69 device_t sdmmc; /* generic SD/MMC device */ 70 71 u_int clkbase; /* base clock frequency in KHz */ 72 int maxblklen; /* maximum block length */ 73 uint32_t ocr; /* OCR value from capabilities */ 74 75 uint8_t regs[14]; /* host controller state */ 76 77 uint16_t intr_status; /* soft interrupt status */ 78 uint16_t intr_error_status; /* soft error status */ 79 kmutex_t intr_lock; 80 kmutex_t bus_clock_lock; 81 kcondvar_t intr_cv; 82 83 callout_t tuning_timer; 84 int tuning_timing; 85 u_int tuning_timer_count; 86 u_int tuning_timer_pending; 87 88 int specver; /* spec. version */ 89 90 uint32_t flags; /* flags for this host */ 91 #define SHF_USE_DMA 0x0001 92 #define SHF_USE_4BIT_MODE 0x0002 93 #define SHF_USE_8BIT_MODE 0x0004 94 #define SHF_MODE_DMAEN 0x0008 /* needs SDHC_DMA_ENABLE in mode */ 95 #define SHF_USE_ADMA2_32 0x0010 96 #define SHF_USE_ADMA2_64 0x0020 97 #define SHF_USE_ADMA2_MASK 0x0030 98 99 bus_dmamap_t adma_map; 100 bus_dma_segment_t adma_segs[1]; 101 void *adma2; 102 103 uint8_t vdd; /* last vdd setting */ 104 }; 105 106 #define HDEVNAME(hp) (device_xname((hp)->sc->sc_dev)) 107 108 static uint8_t 109 hread1(struct sdhc_host *hp, bus_size_t reg) 110 { 111 112 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) 113 return bus_space_read_1(hp->iot, hp->ioh, reg); 114 return bus_space_read_4(hp->iot, hp->ioh, reg & -4) >> (8 * (reg & 3)); 115 } 116 117 static uint16_t 118 hread2(struct sdhc_host *hp, bus_size_t reg) 119 { 120 121 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) 122 return bus_space_read_2(hp->iot, hp->ioh, reg); 123 return bus_space_read_4(hp->iot, hp->ioh, reg & -4) >> (8 * (reg & 2)); 124 } 125 126 #define HREAD1(hp, reg) hread1(hp, reg) 127 #define HREAD2(hp, reg) hread2(hp, reg) 128 #define HREAD4(hp, reg) \ 129 (bus_space_read_4((hp)->iot, (hp)->ioh, (reg))) 130 131 132 static void 133 hwrite1(struct sdhc_host *hp, bus_size_t o, uint8_t val) 134 { 135 136 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 137 bus_space_write_1(hp->iot, hp->ioh, o, val); 138 } else { 139 const size_t shift = 8 * (o & 3); 140 o &= -4; 141 uint32_t tmp = bus_space_read_4(hp->iot, hp->ioh, o); 142 tmp = (val << shift) | (tmp & ~(0xffU << shift)); 143 bus_space_write_4(hp->iot, hp->ioh, o, tmp); 144 } 145 } 146 147 static void 148 hwrite2(struct sdhc_host *hp, bus_size_t o, uint16_t val) 149 { 150 151 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 152 bus_space_write_2(hp->iot, hp->ioh, o, val); 153 } else { 154 const size_t shift = 8 * (o & 2); 155 o &= -4; 156 uint32_t tmp = bus_space_read_4(hp->iot, hp->ioh, o); 157 tmp = (val << shift) | (tmp & ~(0xffffU << shift)); 158 bus_space_write_4(hp->iot, hp->ioh, o, tmp); 159 } 160 } 161 162 static void 163 hwrite4(struct sdhc_host *hp, bus_size_t o, uint32_t val) 164 { 165 166 bus_space_write_4(hp->iot, hp->ioh, o, val); 167 } 168 169 #define HWRITE1(hp, reg, val) hwrite1(hp, reg, val) 170 #define HWRITE2(hp, reg, val) hwrite2(hp, reg, val) 171 #define HWRITE4(hp, reg, val) hwrite4(hp, reg, val) 172 173 #define HCLR1(hp, reg, bits) \ 174 do if ((bits) != 0) HWRITE1((hp), (reg), HREAD1((hp), (reg)) & ~(bits)); while (0) 175 #define HCLR2(hp, reg, bits) \ 176 do if ((bits) != 0) HWRITE2((hp), (reg), HREAD2((hp), (reg)) & ~(bits)); while (0) 177 #define HCLR4(hp, reg, bits) \ 178 do if ((bits) != 0) HWRITE4((hp), (reg), HREAD4((hp), (reg)) & ~(bits)); while (0) 179 #define HSET1(hp, reg, bits) \ 180 do if ((bits) != 0) HWRITE1((hp), (reg), HREAD1((hp), (reg)) | (bits)); while (0) 181 #define HSET2(hp, reg, bits) \ 182 do if ((bits) != 0) HWRITE2((hp), (reg), HREAD2((hp), (reg)) | (bits)); while (0) 183 #define HSET4(hp, reg, bits) \ 184 do if ((bits) != 0) HWRITE4((hp), (reg), HREAD4((hp), (reg)) | (bits)); while (0) 185 186 static int sdhc_host_reset(sdmmc_chipset_handle_t); 187 static int sdhc_host_reset1(sdmmc_chipset_handle_t); 188 static uint32_t sdhc_host_ocr(sdmmc_chipset_handle_t); 189 static int sdhc_host_maxblklen(sdmmc_chipset_handle_t); 190 static int sdhc_card_detect(sdmmc_chipset_handle_t); 191 static int sdhc_write_protect(sdmmc_chipset_handle_t); 192 static int sdhc_bus_power(sdmmc_chipset_handle_t, uint32_t); 193 static int sdhc_bus_clock_ddr(sdmmc_chipset_handle_t, int, bool); 194 static int sdhc_bus_width(sdmmc_chipset_handle_t, int); 195 static int sdhc_bus_rod(sdmmc_chipset_handle_t, int); 196 static void sdhc_card_enable_intr(sdmmc_chipset_handle_t, int); 197 static void sdhc_card_intr_ack(sdmmc_chipset_handle_t); 198 static void sdhc_exec_command(sdmmc_chipset_handle_t, 199 struct sdmmc_command *); 200 static int sdhc_signal_voltage(sdmmc_chipset_handle_t, int); 201 static int sdhc_execute_tuning1(struct sdhc_host *, int); 202 static int sdhc_execute_tuning(sdmmc_chipset_handle_t, int); 203 static void sdhc_tuning_timer(void *); 204 static void sdhc_hw_reset(sdmmc_chipset_handle_t); 205 static int sdhc_start_command(struct sdhc_host *, struct sdmmc_command *); 206 static int sdhc_wait_state(struct sdhc_host *, uint32_t, uint32_t); 207 static int sdhc_soft_reset(struct sdhc_host *, int); 208 static int sdhc_wait_intr(struct sdhc_host *, int, int, bool); 209 static void sdhc_transfer_data(struct sdhc_host *, struct sdmmc_command *); 210 static int sdhc_transfer_data_dma(struct sdhc_host *, struct sdmmc_command *); 211 static int sdhc_transfer_data_pio(struct sdhc_host *, struct sdmmc_command *); 212 static void sdhc_read_data_pio(struct sdhc_host *, uint8_t *, u_int); 213 static void sdhc_write_data_pio(struct sdhc_host *, uint8_t *, u_int); 214 static void esdhc_read_data_pio(struct sdhc_host *, uint8_t *, u_int); 215 static void esdhc_write_data_pio(struct sdhc_host *, uint8_t *, u_int); 216 217 static struct sdmmc_chip_functions sdhc_functions = { 218 /* host controller reset */ 219 .host_reset = sdhc_host_reset, 220 221 /* host controller capabilities */ 222 .host_ocr = sdhc_host_ocr, 223 .host_maxblklen = sdhc_host_maxblklen, 224 225 /* card detection */ 226 .card_detect = sdhc_card_detect, 227 228 /* write protect */ 229 .write_protect = sdhc_write_protect, 230 231 /* bus power, clock frequency, width and ROD(OpenDrain/PushPull) */ 232 .bus_power = sdhc_bus_power, 233 .bus_clock = NULL, /* see sdhc_bus_clock_ddr */ 234 .bus_width = sdhc_bus_width, 235 .bus_rod = sdhc_bus_rod, 236 237 /* command execution */ 238 .exec_command = sdhc_exec_command, 239 240 /* card interrupt */ 241 .card_enable_intr = sdhc_card_enable_intr, 242 .card_intr_ack = sdhc_card_intr_ack, 243 244 /* UHS functions */ 245 .signal_voltage = sdhc_signal_voltage, 246 .bus_clock_ddr = sdhc_bus_clock_ddr, 247 .execute_tuning = sdhc_execute_tuning, 248 .hw_reset = sdhc_hw_reset, 249 }; 250 251 static int 252 sdhc_cfprint(void *aux, const char *pnp) 253 { 254 const struct sdmmcbus_attach_args * const saa = aux; 255 const struct sdhc_host * const hp = saa->saa_sch; 256 257 if (pnp) { 258 aprint_normal("sdmmc at %s", pnp); 259 } 260 for (size_t host = 0; host < hp->sc->sc_nhosts; host++) { 261 if (hp->sc->sc_host[host] == hp) { 262 aprint_normal(" slot %zu", host); 263 } 264 } 265 266 return UNCONF; 267 } 268 269 /* 270 * Called by attachment driver. For each SD card slot there is one SD 271 * host controller standard register set. (1.3) 272 */ 273 int 274 sdhc_host_found(struct sdhc_softc *sc, bus_space_tag_t iot, 275 bus_space_handle_t ioh, bus_size_t iosize) 276 { 277 struct sdmmcbus_attach_args saa; 278 struct sdhc_host *hp; 279 uint32_t caps, caps2; 280 uint16_t sdhcver; 281 int error; 282 283 /* Allocate one more host structure. */ 284 hp = malloc(sizeof(struct sdhc_host), M_DEVBUF, M_WAITOK|M_ZERO); 285 if (hp == NULL) { 286 aprint_error_dev(sc->sc_dev, 287 "couldn't alloc memory (sdhc host)\n"); 288 goto err1; 289 } 290 sc->sc_host[sc->sc_nhosts++] = hp; 291 292 /* Fill in the new host structure. */ 293 hp->sc = sc; 294 hp->iot = iot; 295 hp->ioh = ioh; 296 hp->ios = iosize; 297 hp->dmat = sc->sc_dmat; 298 299 mutex_init(&hp->intr_lock, MUTEX_DEFAULT, IPL_SDMMC); 300 mutex_init(&hp->bus_clock_lock, MUTEX_DEFAULT, IPL_NONE); 301 cv_init(&hp->intr_cv, "sdhcintr"); 302 callout_init(&hp->tuning_timer, CALLOUT_MPSAFE); 303 callout_setfunc(&hp->tuning_timer, sdhc_tuning_timer, hp); 304 305 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 306 sdhcver = SDHC_SPEC_VERS_300 << SDHC_SPEC_VERS_SHIFT; 307 } else if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 308 sdhcver = HREAD4(hp, SDHC_ESDHC_HOST_CTL_VERSION); 309 } else if (iosize <= SDHC_HOST_CTL_VERSION) { 310 sdhcver = SDHC_SPEC_NOVERS << SDHC_SPEC_VERS_SHIFT; 311 } else { 312 sdhcver = HREAD2(hp, SDHC_HOST_CTL_VERSION); 313 } 314 aprint_normal_dev(sc->sc_dev, "SDHC "); 315 hp->specver = SDHC_SPEC_VERSION(sdhcver); 316 switch (SDHC_SPEC_VERSION(sdhcver)) { 317 case SDHC_SPEC_VERS_100: 318 aprint_normal("1.0"); 319 break; 320 case SDHC_SPEC_VERS_200: 321 aprint_normal("2.0"); 322 break; 323 case SDHC_SPEC_VERS_300: 324 aprint_normal("3.0"); 325 break; 326 case SDHC_SPEC_VERS_400: 327 aprint_normal("4.0"); 328 break; 329 case SDHC_SPEC_VERS_410: 330 aprint_normal("4.1"); 331 break; 332 case SDHC_SPEC_VERS_420: 333 aprint_normal("4.2"); 334 break; 335 case SDHC_SPEC_NOVERS: 336 hp->specver = -1; 337 aprint_normal("NO-VERS"); 338 break; 339 default: 340 aprint_normal("unknown version(0x%x)", 341 SDHC_SPEC_VERSION(sdhcver)); 342 break; 343 } 344 if (SDHC_SPEC_VERSION(sdhcver) != SDHC_SPEC_NOVERS) 345 aprint_normal(", rev %u", SDHC_VENDOR_VERSION(sdhcver)); 346 347 /* 348 * Reset the host controller and enable interrupts. 349 */ 350 (void)sdhc_host_reset(hp); 351 352 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 353 /* init uSDHC registers */ 354 HWRITE4(hp, SDHC_MMC_BOOT, 0); 355 HWRITE4(hp, SDHC_HOST_CTL, SDHC_USDHC_BURST_LEN_EN | 356 SDHC_USDHC_HOST_CTL_RESV23 | SDHC_USDHC_EMODE_LE); 357 HWRITE4(hp, SDHC_WATERMARK_LEVEL, 358 (0x10 << SDHC_WATERMARK_WR_BRST_SHIFT) | 359 (0x40 << SDHC_WATERMARK_WRITE_SHIFT) | 360 (0x10 << SDHC_WATERMARK_RD_BRST_SHIFT) | 361 (0x40 << SDHC_WATERMARK_READ_SHIFT)); 362 HSET4(hp, SDHC_VEND_SPEC, 363 SDHC_VEND_SPEC_MBO | 364 SDHC_VEND_SPEC_CARD_CLK_SOFT_EN | 365 SDHC_VEND_SPEC_IPG_PERCLK_SOFT_EN | 366 SDHC_VEND_SPEC_HCLK_SOFT_EN | 367 SDHC_VEND_SPEC_IPG_CLK_SOFT_EN | 368 SDHC_VEND_SPEC_AC12_WR_CHKBUSY_EN | 369 SDHC_VEND_SPEC_FRC_SDCLK_ON); 370 } 371 372 /* Determine host capabilities. */ 373 if (ISSET(sc->sc_flags, SDHC_FLAG_HOSTCAPS)) { 374 caps = sc->sc_caps; 375 caps2 = sc->sc_caps2; 376 } else if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 377 /* uSDHC capability register is little bit different */ 378 caps = HREAD4(hp, SDHC_CAPABILITIES); 379 caps |= SDHC_8BIT_SUPP; 380 if (caps & SDHC_ADMA1_SUPP) 381 caps |= SDHC_ADMA2_SUPP; 382 sc->sc_caps = caps; 383 /* uSDHC has no SDHC_CAPABILITIES2 register */ 384 caps2 = sc->sc_caps2 = SDHC_SDR50_SUPP | SDHC_DDR50_SUPP; 385 } else { 386 caps = sc->sc_caps = HREAD4(hp, SDHC_CAPABILITIES); 387 if (hp->specver >= SDHC_SPEC_VERS_300) { 388 caps2 = sc->sc_caps2 = HREAD4(hp, SDHC_CAPABILITIES2); 389 } else { 390 caps2 = sc->sc_caps2 = 0; 391 } 392 } 393 394 aprint_verbose(", caps <%08x/%08x>", caps, caps2); 395 396 const u_int retuning_mode = (caps2 >> SDHC_RETUNING_MODES_SHIFT) & 397 SDHC_RETUNING_MODES_MASK; 398 if (retuning_mode == SDHC_RETUNING_MODE_1) { 399 hp->tuning_timer_count = (caps2 >> SDHC_TIMER_COUNT_SHIFT) & 400 SDHC_TIMER_COUNT_MASK; 401 if (hp->tuning_timer_count == 0xf) 402 hp->tuning_timer_count = 0; 403 if (hp->tuning_timer_count) 404 hp->tuning_timer_count = 405 1 << (hp->tuning_timer_count - 1); 406 } 407 408 /* 409 * Use DMA if the host system and the controller support it. 410 * Supports integrated or external DMA egine, with or without 411 * SDHC_DMA_ENABLE in the command. 412 */ 413 if (ISSET(sc->sc_flags, SDHC_FLAG_FORCE_DMA) || 414 (ISSET(sc->sc_flags, SDHC_FLAG_USE_DMA && 415 ISSET(caps, SDHC_DMA_SUPPORT)))) { 416 SET(hp->flags, SHF_USE_DMA); 417 418 if (ISSET(caps, SDHC_ADMA2_SUPP) && 419 !ISSET(sc->sc_flags, SDHC_FLAG_BROKEN_ADMA)) { 420 SET(hp->flags, SHF_MODE_DMAEN); 421 /* 422 * 64-bit mode was present in the 2.00 spec, removed 423 * from 3.00, and re-added in 4.00 with a different 424 * descriptor layout. We only support 2.00 and 3.00 425 * descriptors for now. 426 */ 427 if (hp->specver == SDHC_SPEC_VERS_200 && 428 ISSET(caps, SDHC_64BIT_SYS_BUS)) { 429 SET(hp->flags, SHF_USE_ADMA2_64); 430 aprint_normal(", 64-bit ADMA2"); 431 } else { 432 SET(hp->flags, SHF_USE_ADMA2_32); 433 aprint_normal(", 32-bit ADMA2"); 434 } 435 } else { 436 if (!ISSET(sc->sc_flags, SDHC_FLAG_EXTERNAL_DMA) || 437 ISSET(sc->sc_flags, SDHC_FLAG_EXTDMA_DMAEN)) 438 SET(hp->flags, SHF_MODE_DMAEN); 439 if (sc->sc_vendor_transfer_data_dma) { 440 aprint_normal(", platform DMA"); 441 } else { 442 aprint_normal(", SDMA"); 443 } 444 } 445 } else { 446 aprint_normal(", PIO"); 447 } 448 449 /* 450 * Determine the base clock frequency. (2.2.24) 451 */ 452 if (hp->specver >= SDHC_SPEC_VERS_300) { 453 hp->clkbase = SDHC_BASE_V3_FREQ_KHZ(caps); 454 } else { 455 hp->clkbase = SDHC_BASE_FREQ_KHZ(caps); 456 } 457 if (hp->clkbase == 0 || 458 ISSET(sc->sc_flags, SDHC_FLAG_NO_CLKBASE)) { 459 if (sc->sc_clkbase == 0) { 460 /* The attachment driver must tell us. */ 461 aprint_error_dev(sc->sc_dev, 462 "unknown base clock frequency\n"); 463 goto err; 464 } 465 hp->clkbase = sc->sc_clkbase; 466 } 467 if (hp->clkbase < 10000 || hp->clkbase > 10000 * 256) { 468 /* SDHC 1.0 supports only 10-63 MHz. */ 469 aprint_error_dev(sc->sc_dev, 470 "base clock frequency out of range: %u MHz\n", 471 hp->clkbase / 1000); 472 goto err; 473 } 474 aprint_normal(", %u kHz", hp->clkbase); 475 476 /* 477 * XXX Set the data timeout counter value according to 478 * capabilities. (2.2.15) 479 */ 480 HWRITE1(hp, SDHC_TIMEOUT_CTL, SDHC_TIMEOUT_MAX); 481 #if 1 482 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) 483 HWRITE4(hp, SDHC_NINTR_STATUS, SDHC_CMD_TIMEOUT_ERROR << 16); 484 #endif 485 486 if (ISSET(caps, SDHC_EMBEDDED_SLOT)) 487 aprint_normal(", embedded slot"); 488 489 /* 490 * Determine SD bus voltage levels supported by the controller. 491 */ 492 aprint_normal(","); 493 if (ISSET(caps, SDHC_HIGH_SPEED_SUPP)) { 494 SET(hp->ocr, MMC_OCR_HCS); 495 aprint_normal(" HS"); 496 } 497 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_1_8_V)) { 498 if (ISSET(caps2, SDHC_SDR50_SUPP)) { 499 SET(hp->ocr, MMC_OCR_S18A); 500 aprint_normal(" SDR50"); 501 } 502 if (ISSET(caps2, SDHC_DDR50_SUPP)) { 503 SET(hp->ocr, MMC_OCR_S18A); 504 aprint_normal(" DDR50"); 505 } 506 if (ISSET(caps2, SDHC_SDR104_SUPP)) { 507 SET(hp->ocr, MMC_OCR_S18A); 508 aprint_normal(" SDR104 HS200"); 509 } 510 if (ISSET(caps, SDHC_VOLTAGE_SUPP_1_8V)) { 511 SET(hp->ocr, MMC_OCR_1_65V_1_95V); 512 aprint_normal(" 1.8V"); 513 } 514 } 515 if (ISSET(caps, SDHC_VOLTAGE_SUPP_3_0V)) { 516 SET(hp->ocr, MMC_OCR_2_9V_3_0V | MMC_OCR_3_0V_3_1V); 517 aprint_normal(" 3.0V"); 518 } 519 if (ISSET(caps, SDHC_VOLTAGE_SUPP_3_3V)) { 520 SET(hp->ocr, MMC_OCR_3_2V_3_3V | MMC_OCR_3_3V_3_4V); 521 aprint_normal(" 3.3V"); 522 } 523 if (hp->specver >= SDHC_SPEC_VERS_300) { 524 aprint_normal(", re-tuning mode %d", retuning_mode + 1); 525 if (hp->tuning_timer_count) 526 aprint_normal(" (%us timer)", hp->tuning_timer_count); 527 } 528 529 /* 530 * Determine the maximum block length supported by the host 531 * controller. (2.2.24) 532 */ 533 switch((caps >> SDHC_MAX_BLK_LEN_SHIFT) & SDHC_MAX_BLK_LEN_MASK) { 534 case SDHC_MAX_BLK_LEN_512: 535 hp->maxblklen = 512; 536 break; 537 538 case SDHC_MAX_BLK_LEN_1024: 539 hp->maxblklen = 1024; 540 break; 541 542 case SDHC_MAX_BLK_LEN_2048: 543 hp->maxblklen = 2048; 544 break; 545 546 case SDHC_MAX_BLK_LEN_4096: 547 hp->maxblklen = 4096; 548 break; 549 550 default: 551 aprint_error_dev(sc->sc_dev, "max block length unknown\n"); 552 goto err; 553 } 554 aprint_normal(", %u byte blocks", hp->maxblklen); 555 aprint_normal("\n"); 556 557 if (ISSET(hp->flags, SHF_USE_ADMA2_MASK)) { 558 int rseg; 559 560 /* Allocate ADMA2 descriptor memory */ 561 error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 562 PAGE_SIZE, hp->adma_segs, 1, &rseg, BUS_DMA_WAITOK); 563 if (error) { 564 aprint_error_dev(sc->sc_dev, 565 "ADMA2 dmamem_alloc failed (%d)\n", error); 566 goto adma_done; 567 } 568 error = bus_dmamem_map(sc->sc_dmat, hp->adma_segs, rseg, 569 PAGE_SIZE, (void **)&hp->adma2, BUS_DMA_WAITOK); 570 if (error) { 571 aprint_error_dev(sc->sc_dev, 572 "ADMA2 dmamem_map failed (%d)\n", error); 573 goto adma_done; 574 } 575 error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 576 0, BUS_DMA_WAITOK, &hp->adma_map); 577 if (error) { 578 aprint_error_dev(sc->sc_dev, 579 "ADMA2 dmamap_create failed (%d)\n", error); 580 goto adma_done; 581 } 582 error = bus_dmamap_load(sc->sc_dmat, hp->adma_map, 583 hp->adma2, PAGE_SIZE, NULL, 584 BUS_DMA_WAITOK|BUS_DMA_WRITE); 585 if (error) { 586 aprint_error_dev(sc->sc_dev, 587 "ADMA2 dmamap_load failed (%d)\n", error); 588 goto adma_done; 589 } 590 591 memset(hp->adma2, 0, PAGE_SIZE); 592 593 adma_done: 594 if (error) 595 CLR(hp->flags, SHF_USE_ADMA2_MASK); 596 } 597 598 /* 599 * Attach the generic SD/MMC bus driver. (The bus driver must 600 * not invoke any chipset functions before it is attached.) 601 */ 602 memset(&saa, 0, sizeof(saa)); 603 saa.saa_busname = "sdmmc"; 604 saa.saa_sct = &sdhc_functions; 605 saa.saa_sch = hp; 606 saa.saa_dmat = hp->dmat; 607 saa.saa_clkmax = hp->clkbase; 608 if (ISSET(sc->sc_flags, SDHC_FLAG_HAVE_CGM)) 609 saa.saa_clkmin = hp->clkbase / 256 / 2046; 610 else if (ISSET(sc->sc_flags, SDHC_FLAG_HAVE_DVS)) 611 saa.saa_clkmin = hp->clkbase / 256 / 16; 612 else if (hp->sc->sc_clkmsk != 0) 613 saa.saa_clkmin = hp->clkbase / (hp->sc->sc_clkmsk >> 614 (ffs(hp->sc->sc_clkmsk) - 1)); 615 else if (hp->specver >= SDHC_SPEC_VERS_300) 616 saa.saa_clkmin = hp->clkbase / 0x3ff; 617 else 618 saa.saa_clkmin = hp->clkbase / 256; 619 if (!ISSET(sc->sc_flags, SDHC_FLAG_NO_AUTO_STOP)) 620 saa.saa_caps |= SMC_CAPS_AUTO_STOP; 621 saa.saa_caps |= SMC_CAPS_4BIT_MODE; 622 if (ISSET(sc->sc_flags, SDHC_FLAG_8BIT_MODE)) 623 saa.saa_caps |= SMC_CAPS_8BIT_MODE; 624 if (ISSET(caps, SDHC_HIGH_SPEED_SUPP)) 625 saa.saa_caps |= SMC_CAPS_SD_HIGHSPEED | 626 SMC_CAPS_MMC_HIGHSPEED; 627 if (ISSET(caps2, SDHC_SDR104_SUPP)) 628 saa.saa_caps |= SMC_CAPS_UHS_SDR104 | 629 SMC_CAPS_UHS_SDR50 | 630 SMC_CAPS_MMC_HS200; 631 if (ISSET(caps2, SDHC_SDR50_SUPP)) 632 saa.saa_caps |= SMC_CAPS_UHS_SDR50; 633 if (ISSET(caps2, SDHC_DDR50_SUPP)) 634 saa.saa_caps |= SMC_CAPS_UHS_DDR50; 635 if (ISSET(hp->flags, SHF_USE_DMA)) { 636 saa.saa_caps |= SMC_CAPS_DMA; 637 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) 638 saa.saa_caps |= SMC_CAPS_MULTI_SEG_DMA; 639 } 640 if (ISSET(sc->sc_flags, SDHC_FLAG_SINGLE_ONLY)) 641 saa.saa_caps |= SMC_CAPS_SINGLE_ONLY; 642 if (ISSET(sc->sc_flags, SDHC_FLAG_POLL_CARD_DET)) 643 saa.saa_caps |= SMC_CAPS_POLL_CARD_DET; 644 645 if (ISSET(sc->sc_flags, SDHC_FLAG_BROKEN_ADMA2_ZEROLEN)) 646 saa.saa_max_seg = 65535; 647 648 hp->sdmmc = config_found(sc->sc_dev, &saa, sdhc_cfprint, CFARGS_NONE); 649 650 return 0; 651 652 err: 653 callout_destroy(&hp->tuning_timer); 654 cv_destroy(&hp->intr_cv); 655 mutex_destroy(&hp->bus_clock_lock); 656 mutex_destroy(&hp->intr_lock); 657 free(hp, M_DEVBUF); 658 sc->sc_host[--sc->sc_nhosts] = NULL; 659 err1: 660 return 1; 661 } 662 663 int 664 sdhc_detach(struct sdhc_softc *sc, int flags) 665 { 666 struct sdhc_host *hp; 667 int rv = 0; 668 669 for (size_t n = 0; n < sc->sc_nhosts; n++) { 670 hp = sc->sc_host[n]; 671 if (hp == NULL) 672 continue; 673 if (hp->sdmmc != NULL) { 674 rv = config_detach(hp->sdmmc, flags); 675 if (rv) 676 break; 677 hp->sdmmc = NULL; 678 } 679 /* disable interrupts */ 680 if ((flags & DETACH_FORCE) == 0) { 681 mutex_enter(&hp->intr_lock); 682 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 683 HWRITE4(hp, SDHC_NINTR_SIGNAL_EN, 0); 684 } else { 685 HWRITE2(hp, SDHC_NINTR_SIGNAL_EN, 0); 686 } 687 sdhc_soft_reset(hp, SDHC_RESET_ALL); 688 mutex_exit(&hp->intr_lock); 689 } 690 callout_halt(&hp->tuning_timer, NULL); 691 callout_destroy(&hp->tuning_timer); 692 cv_destroy(&hp->intr_cv); 693 mutex_destroy(&hp->intr_lock); 694 if (hp->ios > 0) { 695 bus_space_unmap(hp->iot, hp->ioh, hp->ios); 696 hp->ios = 0; 697 } 698 if (ISSET(hp->flags, SHF_USE_ADMA2_MASK)) { 699 bus_dmamap_unload(sc->sc_dmat, hp->adma_map); 700 bus_dmamap_destroy(sc->sc_dmat, hp->adma_map); 701 bus_dmamem_unmap(sc->sc_dmat, hp->adma2, PAGE_SIZE); 702 bus_dmamem_free(sc->sc_dmat, hp->adma_segs, 1); 703 } 704 free(hp, M_DEVBUF); 705 sc->sc_host[n] = NULL; 706 } 707 708 return rv; 709 } 710 711 bool 712 sdhc_suspend(device_t dev, const pmf_qual_t *qual) 713 { 714 struct sdhc_softc *sc = device_private(dev); 715 struct sdhc_host *hp; 716 size_t i; 717 718 /* XXX poll for command completion or suspend command 719 * in progress */ 720 721 /* Save the host controller state. */ 722 for (size_t n = 0; n < sc->sc_nhosts; n++) { 723 hp = sc->sc_host[n]; 724 if (ISSET(sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 725 for (i = 0; i < sizeof hp->regs; i += 4) { 726 uint32_t v = HREAD4(hp, i); 727 hp->regs[i + 0] = (v >> 0); 728 hp->regs[i + 1] = (v >> 8); 729 if (i + 3 < sizeof hp->regs) { 730 hp->regs[i + 2] = (v >> 16); 731 hp->regs[i + 3] = (v >> 24); 732 } 733 } 734 } else { 735 for (i = 0; i < sizeof hp->regs; i++) { 736 hp->regs[i] = HREAD1(hp, i); 737 } 738 } 739 } 740 return true; 741 } 742 743 bool 744 sdhc_resume(device_t dev, const pmf_qual_t *qual) 745 { 746 struct sdhc_softc *sc = device_private(dev); 747 struct sdhc_host *hp; 748 size_t i; 749 750 /* Restore the host controller state. */ 751 for (size_t n = 0; n < sc->sc_nhosts; n++) { 752 hp = sc->sc_host[n]; 753 (void)sdhc_host_reset(hp); 754 if (ISSET(sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 755 for (i = 0; i < sizeof hp->regs; i += 4) { 756 if (i + 3 < sizeof hp->regs) { 757 HWRITE4(hp, i, 758 (hp->regs[i + 0] << 0) 759 | (hp->regs[i + 1] << 8) 760 | (hp->regs[i + 2] << 16) 761 | (hp->regs[i + 3] << 24)); 762 } else { 763 HWRITE4(hp, i, 764 (hp->regs[i + 0] << 0) 765 | (hp->regs[i + 1] << 8)); 766 } 767 } 768 } else { 769 for (i = 0; i < sizeof hp->regs; i++) { 770 HWRITE1(hp, i, hp->regs[i]); 771 } 772 } 773 } 774 return true; 775 } 776 777 bool 778 sdhc_shutdown(device_t dev, int flags) 779 { 780 struct sdhc_softc *sc = device_private(dev); 781 struct sdhc_host *hp; 782 783 /* XXX chip locks up if we don't disable it before reboot. */ 784 for (size_t i = 0; i < sc->sc_nhosts; i++) { 785 hp = sc->sc_host[i]; 786 (void)sdhc_host_reset(hp); 787 } 788 return true; 789 } 790 791 /* 792 * Reset the host controller. Called during initialization, when 793 * cards are removed, upon resume, and during error recovery. 794 */ 795 static int 796 sdhc_host_reset1(sdmmc_chipset_handle_t sch) 797 { 798 struct sdhc_host *hp = (struct sdhc_host *)sch; 799 uint32_t sdhcimask; 800 int error; 801 802 KASSERT(mutex_owned(&hp->intr_lock)); 803 804 /* Disable all interrupts. */ 805 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 806 HWRITE4(hp, SDHC_NINTR_SIGNAL_EN, 0); 807 } else { 808 HWRITE2(hp, SDHC_NINTR_SIGNAL_EN, 0); 809 } 810 811 /* Let sdhc_bus_power restore power */ 812 hp->vdd = 0; 813 814 /* 815 * Reset the entire host controller and wait up to 100ms for 816 * the controller to clear the reset bit. 817 */ 818 error = sdhc_soft_reset(hp, SDHC_RESET_ALL); 819 if (error) 820 goto out; 821 822 /* Set data timeout counter value to max for now. */ 823 HWRITE1(hp, SDHC_TIMEOUT_CTL, SDHC_TIMEOUT_MAX); 824 #if 1 825 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) 826 HWRITE4(hp, SDHC_NINTR_STATUS, SDHC_CMD_TIMEOUT_ERROR << 16); 827 #endif 828 829 /* Enable interrupts. */ 830 sdhcimask = SDHC_CARD_REMOVAL | SDHC_CARD_INSERTION | 831 SDHC_BUFFER_READ_READY | SDHC_BUFFER_WRITE_READY | 832 SDHC_DMA_INTERRUPT | SDHC_BLOCK_GAP_EVENT | 833 SDHC_TRANSFER_COMPLETE | SDHC_COMMAND_COMPLETE; 834 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 835 sdhcimask |= SDHC_EINTR_STATUS_MASK << 16; 836 HWRITE4(hp, SDHC_NINTR_STATUS_EN, sdhcimask); 837 sdhcimask ^= 838 (SDHC_EINTR_STATUS_MASK ^ SDHC_EINTR_SIGNAL_MASK) << 16; 839 sdhcimask ^= SDHC_BUFFER_READ_READY ^ SDHC_BUFFER_WRITE_READY; 840 HWRITE4(hp, SDHC_NINTR_SIGNAL_EN, sdhcimask); 841 } else { 842 HWRITE2(hp, SDHC_NINTR_STATUS_EN, sdhcimask); 843 HWRITE2(hp, SDHC_EINTR_STATUS_EN, SDHC_EINTR_STATUS_MASK); 844 sdhcimask ^= SDHC_BUFFER_READ_READY ^ SDHC_BUFFER_WRITE_READY; 845 HWRITE2(hp, SDHC_NINTR_SIGNAL_EN, sdhcimask); 846 HWRITE2(hp, SDHC_EINTR_SIGNAL_EN, SDHC_EINTR_SIGNAL_MASK); 847 } 848 849 out: 850 return error; 851 } 852 853 static int 854 sdhc_host_reset(sdmmc_chipset_handle_t sch) 855 { 856 struct sdhc_host *hp = (struct sdhc_host *)sch; 857 int error; 858 859 mutex_enter(&hp->intr_lock); 860 error = sdhc_host_reset1(sch); 861 mutex_exit(&hp->intr_lock); 862 863 return error; 864 } 865 866 static uint32_t 867 sdhc_host_ocr(sdmmc_chipset_handle_t sch) 868 { 869 struct sdhc_host *hp = (struct sdhc_host *)sch; 870 871 return hp->ocr; 872 } 873 874 static int 875 sdhc_host_maxblklen(sdmmc_chipset_handle_t sch) 876 { 877 struct sdhc_host *hp = (struct sdhc_host *)sch; 878 879 return hp->maxblklen; 880 } 881 882 /* 883 * Return non-zero if the card is currently inserted. 884 */ 885 static int 886 sdhc_card_detect(sdmmc_chipset_handle_t sch) 887 { 888 struct sdhc_host *hp = (struct sdhc_host *)sch; 889 int r; 890 891 if (hp->sc->sc_vendor_card_detect) 892 return (*hp->sc->sc_vendor_card_detect)(hp->sc); 893 894 r = ISSET(HREAD4(hp, SDHC_PRESENT_STATE), SDHC_CARD_INSERTED); 895 896 return r ? 1 : 0; 897 } 898 899 /* 900 * Return non-zero if the card is currently write-protected. 901 */ 902 static int 903 sdhc_write_protect(sdmmc_chipset_handle_t sch) 904 { 905 struct sdhc_host *hp = (struct sdhc_host *)sch; 906 int r; 907 908 if (hp->sc->sc_vendor_write_protect) 909 return (*hp->sc->sc_vendor_write_protect)(hp->sc); 910 911 r = ISSET(HREAD4(hp, SDHC_PRESENT_STATE), SDHC_WRITE_PROTECT_SWITCH); 912 913 return r ? 0 : 1; 914 } 915 916 /* 917 * Set or change SD bus voltage and enable or disable SD bus power. 918 * Return zero on success. 919 */ 920 static int 921 sdhc_bus_power(sdmmc_chipset_handle_t sch, uint32_t ocr) 922 { 923 struct sdhc_host *hp = (struct sdhc_host *)sch; 924 uint8_t vdd; 925 int error = 0; 926 const uint32_t pcmask = 927 ~(SDHC_BUS_POWER | (SDHC_VOLTAGE_MASK << SDHC_VOLTAGE_SHIFT)); 928 uint32_t reg; 929 930 mutex_enter(&hp->intr_lock); 931 932 /* 933 * Disable bus power before voltage change. 934 */ 935 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS) 936 && !ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_PWR0)) { 937 hp->vdd = 0; 938 HWRITE1(hp, SDHC_POWER_CTL, 0); 939 } 940 941 /* If power is disabled, reset the host and return now. */ 942 if (ocr == 0) { 943 (void)sdhc_host_reset1(hp); 944 callout_halt(&hp->tuning_timer, &hp->intr_lock); 945 goto out; 946 } 947 948 /* 949 * Select the lowest voltage according to capabilities. 950 */ 951 ocr &= hp->ocr; 952 if (ISSET(ocr, MMC_OCR_1_65V_1_95V)) { 953 vdd = SDHC_VOLTAGE_1_8V; 954 } else if (ISSET(ocr, MMC_OCR_2_9V_3_0V|MMC_OCR_3_0V_3_1V)) { 955 vdd = SDHC_VOLTAGE_3_0V; 956 } else if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) { 957 vdd = SDHC_VOLTAGE_3_3V; 958 } else { 959 /* Unsupported voltage level requested. */ 960 error = EINVAL; 961 goto out; 962 } 963 964 /* 965 * Did voltage change ? 966 */ 967 if (vdd == hp->vdd) 968 goto out; 969 970 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 971 /* 972 * Enable bus power. Wait at least 1 ms (or 74 clocks) plus 973 * voltage ramp until power rises. 974 */ 975 976 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_SINGLE_POWER_WRITE)) { 977 HWRITE1(hp, SDHC_POWER_CTL, 978 (vdd << SDHC_VOLTAGE_SHIFT) | SDHC_BUS_POWER); 979 } else { 980 reg = HREAD1(hp, SDHC_POWER_CTL) & pcmask; 981 HWRITE1(hp, SDHC_POWER_CTL, reg); 982 sdmmc_delay(1); 983 reg |= (vdd << SDHC_VOLTAGE_SHIFT); 984 HWRITE1(hp, SDHC_POWER_CTL, reg); 985 sdmmc_delay(1); 986 reg |= SDHC_BUS_POWER; 987 HWRITE1(hp, SDHC_POWER_CTL, reg); 988 sdmmc_delay(10000); 989 } 990 991 /* 992 * The host system may not power the bus due to battery low, 993 * etc. In that case, the host controller should clear the 994 * bus power bit. 995 */ 996 if (!ISSET(HREAD1(hp, SDHC_POWER_CTL), SDHC_BUS_POWER)) { 997 error = ENXIO; 998 goto out; 999 } 1000 } 1001 1002 /* power successfully changed */ 1003 hp->vdd = vdd; 1004 1005 out: 1006 mutex_exit(&hp->intr_lock); 1007 1008 return error; 1009 } 1010 1011 /* 1012 * Return the smallest possible base clock frequency divisor value 1013 * for the CLOCK_CTL register to produce `freq' (KHz). 1014 */ 1015 static bool 1016 sdhc_clock_divisor(struct sdhc_host *hp, u_int freq, u_int *divp) 1017 { 1018 u_int div; 1019 1020 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_HAVE_CGM)) { 1021 for (div = hp->clkbase / freq; div <= 0x3ff; div++) { 1022 if ((hp->clkbase / div) <= freq) { 1023 *divp = SDHC_SDCLK_CGM 1024 | ((div & 0x300) << SDHC_SDCLK_XDIV_SHIFT) 1025 | ((div & 0x0ff) << SDHC_SDCLK_DIV_SHIFT); 1026 //freq = hp->clkbase / div; 1027 return true; 1028 } 1029 } 1030 /* No divisor found. */ 1031 return false; 1032 } 1033 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_HAVE_DVS)) { 1034 u_int dvs = (hp->clkbase + freq - 1) / freq; 1035 u_int roundup = dvs & 1; 1036 for (dvs >>= 1, div = 1; div <= 256; div <<= 1, dvs >>= 1) { 1037 if (dvs + roundup <= 16) { 1038 dvs += roundup - 1; 1039 *divp = (div << SDHC_SDCLK_DIV_SHIFT) 1040 | (dvs << SDHC_SDCLK_DVS_SHIFT); 1041 DPRINTF(2, 1042 ("%s: divisor for freq %u is %u * %u\n", 1043 HDEVNAME(hp), freq, div * 2, dvs + 1)); 1044 //freq = hp->clkbase / (div * 2) * (dvs + 1); 1045 return true; 1046 } 1047 /* 1048 * If we drop bits, we need to round up the divisor. 1049 */ 1050 roundup |= dvs & 1; 1051 } 1052 /* No divisor found. */ 1053 return false; 1054 } 1055 if (hp->sc->sc_clkmsk != 0) { 1056 div = howmany(hp->clkbase, freq); 1057 if (div > (hp->sc->sc_clkmsk >> (ffs(hp->sc->sc_clkmsk) - 1))) 1058 return false; 1059 *divp = div << (ffs(hp->sc->sc_clkmsk) - 1); 1060 //freq = hp->clkbase / div; 1061 return true; 1062 } 1063 if (hp->specver >= SDHC_SPEC_VERS_300) { 1064 div = howmany(hp->clkbase, freq); 1065 div = div > 1 ? howmany(div, 2) : 0; 1066 if (div > 0x3ff) 1067 return false; 1068 *divp = (((div >> 8) & SDHC_SDCLK_XDIV_MASK) 1069 << SDHC_SDCLK_XDIV_SHIFT) | 1070 (((div >> 0) & SDHC_SDCLK_DIV_MASK) 1071 << SDHC_SDCLK_DIV_SHIFT); 1072 //freq = hp->clkbase / (div ? div * 2 : 1); 1073 return true; 1074 } else { 1075 for (div = 1; div <= 256; div *= 2) { 1076 if ((hp->clkbase / div) <= freq) { 1077 *divp = (div / 2) << SDHC_SDCLK_DIV_SHIFT; 1078 //freq = hp->clkbase / div; 1079 return true; 1080 } 1081 } 1082 /* No divisor found. */ 1083 return false; 1084 } 1085 /* No divisor found. */ 1086 return false; 1087 } 1088 1089 /* 1090 * Set or change SDCLK frequency or disable the SD clock. 1091 * Return zero on success. 1092 */ 1093 static int 1094 sdhc_bus_clock_ddr(sdmmc_chipset_handle_t sch, int freq, bool ddr) 1095 { 1096 struct sdhc_host *hp = (struct sdhc_host *)sch; 1097 u_int div; 1098 u_int timo; 1099 int16_t reg; 1100 int error = 0; 1101 bool present __diagused; 1102 1103 #ifdef DIAGNOSTIC 1104 present = ISSET(HREAD4(hp, SDHC_PRESENT_STATE), SDHC_CMD_INHIBIT_MASK); 1105 1106 /* Must not stop the clock if commands are in progress. */ 1107 if (present && sdhc_card_detect(hp)) { 1108 aprint_normal_dev(hp->sc->sc_dev, 1109 "%s: command in progress\n", __func__); 1110 } 1111 #endif 1112 1113 if (hp->sc->sc_vendor_bus_clock) { 1114 mutex_enter(&hp->bus_clock_lock); 1115 error = (*hp->sc->sc_vendor_bus_clock)(hp->sc, freq); 1116 mutex_exit(&hp->bus_clock_lock); 1117 if (error != 0) 1118 return error; 1119 } 1120 1121 mutex_enter(&hp->intr_lock); 1122 1123 /* 1124 * Stop SD clock before changing the frequency. 1125 */ 1126 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1127 HCLR4(hp, SDHC_VEND_SPEC, 1128 SDHC_VEND_SPEC_CARD_CLK_SOFT_EN | 1129 SDHC_VEND_SPEC_FRC_SDCLK_ON); 1130 if (freq == SDMMC_SDCLK_OFF) { 1131 goto out; 1132 } 1133 } else if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 1134 HCLR4(hp, SDHC_CLOCK_CTL, 0xfff8); 1135 if (freq == SDMMC_SDCLK_OFF) { 1136 HSET4(hp, SDHC_CLOCK_CTL, 0x80f0); 1137 goto out; 1138 } 1139 } else { 1140 HCLR2(hp, SDHC_CLOCK_CTL, SDHC_SDCLK_ENABLE); 1141 if (freq == SDMMC_SDCLK_OFF) 1142 goto out; 1143 } 1144 1145 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1146 if (ddr) 1147 HSET4(hp, SDHC_MIX_CTRL, SDHC_USDHC_DDR_EN); 1148 else 1149 HCLR4(hp, SDHC_MIX_CTRL, SDHC_USDHC_DDR_EN); 1150 } else if (hp->specver >= SDHC_SPEC_VERS_300) { 1151 HCLR2(hp, SDHC_HOST_CTL2, SDHC_UHS_MODE_SELECT_MASK); 1152 if (freq > 100000) { 1153 HSET2(hp, SDHC_HOST_CTL2, SDHC_UHS_MODE_SELECT_SDR104); 1154 } else if (freq > 50000) { 1155 if (ddr) { 1156 HSET2(hp, SDHC_HOST_CTL2, 1157 SDHC_UHS_MODE_SELECT_DDR50); 1158 } else { 1159 HSET2(hp, SDHC_HOST_CTL2, 1160 SDHC_UHS_MODE_SELECT_SDR50); 1161 } 1162 } else if (freq > 25000) { 1163 if (ddr) { 1164 HSET2(hp, SDHC_HOST_CTL2, 1165 SDHC_UHS_MODE_SELECT_DDR50); 1166 } else { 1167 HSET2(hp, SDHC_HOST_CTL2, 1168 SDHC_UHS_MODE_SELECT_SDR25); 1169 } 1170 } else if (freq > 400) { 1171 HSET2(hp, SDHC_HOST_CTL2, SDHC_UHS_MODE_SELECT_SDR12); 1172 } 1173 } 1174 1175 /* 1176 * Slow down Ricoh 5U823 controller that isn't reliable 1177 * at 100MHz bus clock. 1178 */ 1179 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_SLOW_SDR50)) { 1180 if (freq == 100000) 1181 --freq; 1182 } 1183 1184 /* 1185 * Set the minimum base clock frequency divisor. 1186 */ 1187 if (!sdhc_clock_divisor(hp, freq, &div)) { 1188 /* Invalid base clock frequency or `freq' value. */ 1189 aprint_error_dev(hp->sc->sc_dev, 1190 "Invalid bus clock %d kHz\n", freq); 1191 error = EINVAL; 1192 goto out; 1193 } 1194 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1195 if (ddr) { 1196 /* in ddr mode, divisor >>= 1 */ 1197 div = ((div >> 1) & (SDHC_SDCLK_DIV_MASK << 1198 SDHC_SDCLK_DIV_SHIFT)) | 1199 (div & (SDHC_SDCLK_DVS_MASK << 1200 SDHC_SDCLK_DVS_SHIFT)); 1201 } 1202 for (timo = 1000; timo > 0; timo--) { 1203 if (ISSET(HREAD4(hp, SDHC_PRESENT_STATE), SDHC_SDSTB)) 1204 break; 1205 sdmmc_delay(10); 1206 } 1207 HWRITE4(hp, SDHC_CLOCK_CTL, 1208 div | (SDHC_TIMEOUT_MAX << 16) | 0x0f); 1209 } else if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 1210 HWRITE4(hp, SDHC_CLOCK_CTL, 1211 div | (SDHC_TIMEOUT_MAX << 16)); 1212 } else { 1213 reg = HREAD2(hp, SDHC_CLOCK_CTL); 1214 reg &= (SDHC_INTCLK_STABLE | SDHC_INTCLK_ENABLE); 1215 HWRITE2(hp, SDHC_CLOCK_CTL, reg | div); 1216 } 1217 1218 /* 1219 * Start internal clock. Wait 10ms for stabilization. 1220 */ 1221 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1222 HSET4(hp, SDHC_VEND_SPEC, 1223 SDHC_VEND_SPEC_CARD_CLK_SOFT_EN | 1224 SDHC_VEND_SPEC_FRC_SDCLK_ON); 1225 } else if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 1226 sdmmc_delay(10000); 1227 HSET4(hp, SDHC_CLOCK_CTL, 1228 8 | SDHC_INTCLK_ENABLE | SDHC_INTCLK_STABLE); 1229 } else { 1230 HSET2(hp, SDHC_CLOCK_CTL, SDHC_INTCLK_ENABLE); 1231 for (timo = 1000; timo > 0; timo--) { 1232 if (ISSET(HREAD2(hp, SDHC_CLOCK_CTL), 1233 SDHC_INTCLK_STABLE)) 1234 break; 1235 sdmmc_delay(10); 1236 } 1237 if (timo == 0) { 1238 error = ETIMEDOUT; 1239 DPRINTF(1,("%s: timeout\n", __func__)); 1240 goto out; 1241 } 1242 } 1243 1244 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1245 HSET1(hp, SDHC_SOFTWARE_RESET, SDHC_INIT_ACTIVE); 1246 /* 1247 * Sending 80 clocks at 400kHz takes 200us. 1248 * So delay for that time + slop and then 1249 * check a few times for completion. 1250 */ 1251 sdmmc_delay(210); 1252 for (timo = 10; timo > 0; timo--) { 1253 if (!ISSET(HREAD1(hp, SDHC_SOFTWARE_RESET), 1254 SDHC_INIT_ACTIVE)) 1255 break; 1256 sdmmc_delay(10); 1257 } 1258 DPRINTF(2,("%s: %u init spins\n", __func__, 10 - timo)); 1259 1260 /* 1261 * Enable SD clock. 1262 */ 1263 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1264 HSET4(hp, SDHC_VEND_SPEC, 1265 SDHC_VEND_SPEC_CARD_CLK_SOFT_EN | 1266 SDHC_VEND_SPEC_FRC_SDCLK_ON); 1267 } else { 1268 HSET4(hp, SDHC_CLOCK_CTL, SDHC_SDCLK_ENABLE); 1269 } 1270 } else { 1271 /* 1272 * Enable SD clock. 1273 */ 1274 HSET2(hp, SDHC_CLOCK_CTL, SDHC_SDCLK_ENABLE); 1275 1276 if (freq > 25000 && 1277 !ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_HS_BIT)) 1278 HSET1(hp, SDHC_HOST_CTL, SDHC_HIGH_SPEED); 1279 else 1280 HCLR1(hp, SDHC_HOST_CTL, SDHC_HIGH_SPEED); 1281 } 1282 1283 mutex_exit(&hp->intr_lock); 1284 1285 if (hp->sc->sc_vendor_bus_clock_post) { 1286 mutex_enter(&hp->bus_clock_lock); 1287 error = (*hp->sc->sc_vendor_bus_clock_post)(hp->sc, freq); 1288 mutex_exit(&hp->bus_clock_lock); 1289 } 1290 return error; 1291 1292 out: 1293 mutex_exit(&hp->intr_lock); 1294 1295 return error; 1296 } 1297 1298 static int 1299 sdhc_bus_width(sdmmc_chipset_handle_t sch, int width) 1300 { 1301 struct sdhc_host *hp = (struct sdhc_host *)sch; 1302 int reg; 1303 1304 switch (width) { 1305 case 1: 1306 case 4: 1307 break; 1308 1309 case 8: 1310 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_8BIT_MODE)) 1311 break; 1312 /* FALLTHROUGH */ 1313 default: 1314 DPRINTF(0,("%s: unsupported bus width (%d)\n", 1315 HDEVNAME(hp), width)); 1316 return 1; 1317 } 1318 1319 if (hp->sc->sc_vendor_bus_width) { 1320 const int error = hp->sc->sc_vendor_bus_width(hp->sc, width); 1321 if (error != 0) 1322 return error; 1323 } 1324 1325 mutex_enter(&hp->intr_lock); 1326 1327 reg = HREAD1(hp, SDHC_HOST_CTL); 1328 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1329 reg &= ~(SDHC_4BIT_MODE|SDHC_ESDHC_8BIT_MODE); 1330 if (width == 4) 1331 reg |= SDHC_4BIT_MODE; 1332 else if (width == 8) 1333 reg |= SDHC_ESDHC_8BIT_MODE; 1334 } else { 1335 reg &= ~SDHC_4BIT_MODE; 1336 if (hp->specver >= SDHC_SPEC_VERS_300) { 1337 reg &= ~SDHC_8BIT_MODE; 1338 } 1339 if (width == 4) { 1340 reg |= SDHC_4BIT_MODE; 1341 } else if (width == 8 && hp->specver >= SDHC_SPEC_VERS_300) { 1342 reg |= SDHC_8BIT_MODE; 1343 } 1344 } 1345 HWRITE1(hp, SDHC_HOST_CTL, reg); 1346 1347 mutex_exit(&hp->intr_lock); 1348 1349 return 0; 1350 } 1351 1352 static int 1353 sdhc_bus_rod(sdmmc_chipset_handle_t sch, int on) 1354 { 1355 struct sdhc_host *hp = (struct sdhc_host *)sch; 1356 1357 if (hp->sc->sc_vendor_rod) 1358 return (*hp->sc->sc_vendor_rod)(hp->sc, on); 1359 1360 return 0; 1361 } 1362 1363 static void 1364 sdhc_card_enable_intr(sdmmc_chipset_handle_t sch, int enable) 1365 { 1366 struct sdhc_host *hp = (struct sdhc_host *)sch; 1367 1368 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1369 mutex_enter(&hp->intr_lock); 1370 if (enable) { 1371 HSET2(hp, SDHC_NINTR_STATUS_EN, SDHC_CARD_INTERRUPT); 1372 HSET2(hp, SDHC_NINTR_SIGNAL_EN, SDHC_CARD_INTERRUPT); 1373 } else { 1374 HCLR2(hp, SDHC_NINTR_SIGNAL_EN, SDHC_CARD_INTERRUPT); 1375 HCLR2(hp, SDHC_NINTR_STATUS_EN, SDHC_CARD_INTERRUPT); 1376 } 1377 mutex_exit(&hp->intr_lock); 1378 } 1379 } 1380 1381 static void 1382 sdhc_card_intr_ack(sdmmc_chipset_handle_t sch) 1383 { 1384 struct sdhc_host *hp = (struct sdhc_host *)sch; 1385 1386 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1387 mutex_enter(&hp->intr_lock); 1388 HSET2(hp, SDHC_NINTR_STATUS_EN, SDHC_CARD_INTERRUPT); 1389 mutex_exit(&hp->intr_lock); 1390 } 1391 } 1392 1393 static int 1394 sdhc_signal_voltage(sdmmc_chipset_handle_t sch, int signal_voltage) 1395 { 1396 struct sdhc_host *hp = (struct sdhc_host *)sch; 1397 int error = 0; 1398 1399 if (hp->specver < SDHC_SPEC_VERS_300) 1400 return EINVAL; 1401 1402 mutex_enter(&hp->intr_lock); 1403 switch (signal_voltage) { 1404 case SDMMC_SIGNAL_VOLTAGE_180: 1405 if (hp->sc->sc_vendor_signal_voltage != NULL) { 1406 error = hp->sc->sc_vendor_signal_voltage(hp->sc, 1407 signal_voltage); 1408 if (error != 0) 1409 break; 1410 } 1411 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) 1412 HSET2(hp, SDHC_HOST_CTL2, SDHC_1_8V_SIGNAL_EN); 1413 break; 1414 case SDMMC_SIGNAL_VOLTAGE_330: 1415 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) 1416 HCLR2(hp, SDHC_HOST_CTL2, SDHC_1_8V_SIGNAL_EN); 1417 if (hp->sc->sc_vendor_signal_voltage != NULL) { 1418 error = hp->sc->sc_vendor_signal_voltage(hp->sc, 1419 signal_voltage); 1420 if (error != 0) 1421 break; 1422 } 1423 break; 1424 default: 1425 error = EINVAL; 1426 break; 1427 } 1428 mutex_exit(&hp->intr_lock); 1429 1430 return error; 1431 } 1432 1433 /* 1434 * Sampling clock tuning procedure (UHS) 1435 */ 1436 static int 1437 sdhc_execute_tuning1(struct sdhc_host *hp, int timing) 1438 { 1439 struct sdmmc_command cmd; 1440 uint8_t hostctl; 1441 int opcode, error, retry = 40; 1442 1443 KASSERT(mutex_owned(&hp->intr_lock)); 1444 1445 hp->tuning_timing = timing; 1446 1447 switch (timing) { 1448 case SDMMC_TIMING_MMC_HS200: 1449 opcode = MMC_SEND_TUNING_BLOCK_HS200; 1450 break; 1451 case SDMMC_TIMING_UHS_SDR50: 1452 if (!ISSET(hp->sc->sc_caps2, SDHC_TUNING_SDR50)) 1453 return 0; 1454 /* FALLTHROUGH */ 1455 case SDMMC_TIMING_UHS_SDR104: 1456 opcode = MMC_SEND_TUNING_BLOCK; 1457 break; 1458 default: 1459 return EINVAL; 1460 } 1461 1462 hostctl = HREAD1(hp, SDHC_HOST_CTL); 1463 1464 /* enable buffer read ready interrupt */ 1465 HSET2(hp, SDHC_NINTR_SIGNAL_EN, SDHC_BUFFER_READ_READY); 1466 HSET2(hp, SDHC_NINTR_STATUS_EN, SDHC_BUFFER_READ_READY); 1467 1468 /* disable DMA */ 1469 HCLR1(hp, SDHC_HOST_CTL, SDHC_DMA_SELECT); 1470 1471 /* reset tuning circuit */ 1472 HCLR2(hp, SDHC_HOST_CTL2, SDHC_SAMPLING_CLOCK_SEL); 1473 1474 /* start of tuning */ 1475 HWRITE2(hp, SDHC_HOST_CTL2, SDHC_EXECUTE_TUNING); 1476 1477 do { 1478 memset(&cmd, 0, sizeof(cmd)); 1479 cmd.c_opcode = opcode; 1480 cmd.c_arg = 0; 1481 cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1; 1482 if (ISSET(hostctl, SDHC_8BIT_MODE)) { 1483 cmd.c_blklen = cmd.c_datalen = 128; 1484 } else { 1485 cmd.c_blklen = cmd.c_datalen = 64; 1486 } 1487 1488 error = sdhc_start_command(hp, &cmd); 1489 if (error) 1490 break; 1491 1492 if (!sdhc_wait_intr(hp, SDHC_BUFFER_READ_READY, 1493 SDHC_TUNING_TIMEOUT, false)) { 1494 break; 1495 } 1496 1497 delay(1000); 1498 } while (HREAD2(hp, SDHC_HOST_CTL2) & SDHC_EXECUTE_TUNING && --retry); 1499 1500 /* disable buffer read ready interrupt */ 1501 HCLR2(hp, SDHC_NINTR_SIGNAL_EN, SDHC_BUFFER_READ_READY); 1502 HCLR2(hp, SDHC_NINTR_STATUS_EN, SDHC_BUFFER_READ_READY); 1503 1504 if (HREAD2(hp, SDHC_HOST_CTL2) & SDHC_EXECUTE_TUNING) { 1505 HCLR2(hp, SDHC_HOST_CTL2, 1506 SDHC_SAMPLING_CLOCK_SEL|SDHC_EXECUTE_TUNING); 1507 sdhc_soft_reset(hp, SDHC_RESET_DAT|SDHC_RESET_CMD); 1508 aprint_error_dev(hp->sc->sc_dev, 1509 "tuning did not complete, using fixed sampling clock\n"); 1510 return 0; /* tuning did not complete */ 1511 } 1512 1513 if ((HREAD2(hp, SDHC_HOST_CTL2) & SDHC_SAMPLING_CLOCK_SEL) == 0) { 1514 HCLR2(hp, SDHC_HOST_CTL2, 1515 SDHC_SAMPLING_CLOCK_SEL|SDHC_EXECUTE_TUNING); 1516 sdhc_soft_reset(hp, SDHC_RESET_DAT|SDHC_RESET_CMD); 1517 aprint_error_dev(hp->sc->sc_dev, 1518 "tuning failed, using fixed sampling clock\n"); 1519 return 0; /* tuning failed */ 1520 } 1521 1522 if (hp->tuning_timer_count) { 1523 callout_schedule(&hp->tuning_timer, 1524 hz * hp->tuning_timer_count); 1525 } 1526 1527 return 0; /* tuning completed */ 1528 } 1529 1530 static int 1531 sdhc_execute_tuning(sdmmc_chipset_handle_t sch, int timing) 1532 { 1533 struct sdhc_host *hp = (struct sdhc_host *)sch; 1534 int error; 1535 1536 mutex_enter(&hp->intr_lock); 1537 error = sdhc_execute_tuning1(hp, timing); 1538 mutex_exit(&hp->intr_lock); 1539 return error; 1540 } 1541 1542 static void 1543 sdhc_tuning_timer(void *arg) 1544 { 1545 struct sdhc_host *hp = arg; 1546 1547 atomic_swap_uint(&hp->tuning_timer_pending, 1); 1548 } 1549 1550 static void 1551 sdhc_hw_reset(sdmmc_chipset_handle_t sch) 1552 { 1553 struct sdhc_host *hp = (struct sdhc_host *)sch; 1554 struct sdhc_softc *sc = hp->sc; 1555 1556 if (sc->sc_vendor_hw_reset != NULL) 1557 sc->sc_vendor_hw_reset(sc, hp); 1558 } 1559 1560 static int 1561 sdhc_wait_state(struct sdhc_host *hp, uint32_t mask, uint32_t value) 1562 { 1563 uint32_t state; 1564 int timeout; 1565 1566 for (timeout = 100000; timeout > 0; timeout--) { 1567 if (((state = HREAD4(hp, SDHC_PRESENT_STATE)) & mask) == value) 1568 return 0; 1569 sdmmc_delay(10); 1570 } 1571 aprint_error_dev(hp->sc->sc_dev, "timeout waiting for mask %#x value %#x (state=%#x)\n", 1572 mask, value, state); 1573 return ETIMEDOUT; 1574 } 1575 1576 static void 1577 sdhc_exec_command(sdmmc_chipset_handle_t sch, struct sdmmc_command *cmd) 1578 { 1579 struct sdhc_host *hp = (struct sdhc_host *)sch; 1580 int error; 1581 bool probing; 1582 1583 mutex_enter(&hp->intr_lock); 1584 1585 if (atomic_cas_uint(&hp->tuning_timer_pending, 1, 0) == 1) { 1586 (void)sdhc_execute_tuning1(hp, hp->tuning_timing); 1587 } 1588 1589 if (cmd->c_data && 1590 ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1591 const uint16_t ready = SDHC_BUFFER_READ_READY | SDHC_BUFFER_WRITE_READY; 1592 if (ISSET(hp->flags, SHF_USE_DMA)) { 1593 HCLR2(hp, SDHC_NINTR_SIGNAL_EN, ready); 1594 HCLR2(hp, SDHC_NINTR_STATUS_EN, ready); 1595 } else { 1596 HSET2(hp, SDHC_NINTR_SIGNAL_EN, ready); 1597 HSET2(hp, SDHC_NINTR_STATUS_EN, ready); 1598 } 1599 } 1600 1601 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_TIMEOUT)) { 1602 const uint16_t eintr = SDHC_CMD_TIMEOUT_ERROR; 1603 if (cmd->c_data != NULL) { 1604 HCLR2(hp, SDHC_EINTR_SIGNAL_EN, eintr); 1605 HCLR2(hp, SDHC_EINTR_STATUS_EN, eintr); 1606 } else { 1607 HSET2(hp, SDHC_EINTR_SIGNAL_EN, eintr); 1608 HSET2(hp, SDHC_EINTR_STATUS_EN, eintr); 1609 } 1610 } 1611 1612 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_STOP_WITH_TC)) { 1613 if (cmd->c_opcode == MMC_STOP_TRANSMISSION) 1614 SET(cmd->c_flags, SCF_RSP_BSY); 1615 } 1616 1617 /* 1618 * Start the MMC command, or mark `cmd' as failed and return. 1619 */ 1620 error = sdhc_start_command(hp, cmd); 1621 if (error) { 1622 cmd->c_error = error; 1623 goto out; 1624 } 1625 1626 /* 1627 * Wait until the command phase is done, or until the command 1628 * is marked done for any other reason. 1629 */ 1630 probing = (cmd->c_flags & SCF_TOUT_OK) != 0; 1631 if (!sdhc_wait_intr(hp, SDHC_COMMAND_COMPLETE, SDHC_COMMAND_TIMEOUT*3, probing)) { 1632 DPRINTF(1,("%s: timeout for command\n", __func__)); 1633 sdmmc_delay(50); 1634 cmd->c_error = ETIMEDOUT; 1635 goto out; 1636 } 1637 1638 /* 1639 * The host controller removes bits [0:7] from the response 1640 * data (CRC) and we pass the data up unchanged to the bus 1641 * driver (without padding). 1642 */ 1643 if (cmd->c_error == 0 && ISSET(cmd->c_flags, SCF_RSP_PRESENT)) { 1644 cmd->c_resp[0] = HREAD4(hp, SDHC_RESPONSE + 0); 1645 if (ISSET(cmd->c_flags, SCF_RSP_136)) { 1646 cmd->c_resp[1] = HREAD4(hp, SDHC_RESPONSE + 4); 1647 cmd->c_resp[2] = HREAD4(hp, SDHC_RESPONSE + 8); 1648 cmd->c_resp[3] = HREAD4(hp, SDHC_RESPONSE + 12); 1649 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_RSP136_CRC)) { 1650 cmd->c_resp[0] = (cmd->c_resp[0] >> 8) | 1651 (cmd->c_resp[1] << 24); 1652 cmd->c_resp[1] = (cmd->c_resp[1] >> 8) | 1653 (cmd->c_resp[2] << 24); 1654 cmd->c_resp[2] = (cmd->c_resp[2] >> 8) | 1655 (cmd->c_resp[3] << 24); 1656 cmd->c_resp[3] = (cmd->c_resp[3] >> 8); 1657 } 1658 } 1659 } 1660 DPRINTF(1,("%s: resp = %08x\n", HDEVNAME(hp), cmd->c_resp[0])); 1661 1662 /* 1663 * If the command has data to transfer in any direction, 1664 * execute the transfer now. 1665 */ 1666 if (cmd->c_error == 0 && cmd->c_data != NULL) 1667 sdhc_transfer_data(hp, cmd); 1668 else if (ISSET(cmd->c_flags, SCF_RSP_BSY)) { 1669 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_BUSY_INTR) && 1670 !sdhc_wait_intr(hp, SDHC_TRANSFER_COMPLETE, hz * 10, false)) { 1671 DPRINTF(1,("%s: sdhc_exec_command: RSP_BSY\n", 1672 HDEVNAME(hp))); 1673 cmd->c_error = ETIMEDOUT; 1674 goto out; 1675 } 1676 } 1677 1678 out: 1679 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED) 1680 && !ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_LED_ON)) { 1681 /* Turn off the LED. */ 1682 HCLR1(hp, SDHC_HOST_CTL, SDHC_LED_ON); 1683 } 1684 SET(cmd->c_flags, SCF_ITSDONE); 1685 1686 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_NO_AUTO_STOP) && 1687 cmd->c_opcode == MMC_STOP_TRANSMISSION) 1688 (void)sdhc_soft_reset(hp, SDHC_RESET_CMD|SDHC_RESET_DAT); 1689 1690 mutex_exit(&hp->intr_lock); 1691 1692 DPRINTF(1,("%s: cmd %d %s (flags=%08x error=%d)\n", HDEVNAME(hp), 1693 cmd->c_opcode, (cmd->c_error == 0) ? "done" : "abort", 1694 cmd->c_flags, cmd->c_error)); 1695 } 1696 1697 static int 1698 sdhc_start_command(struct sdhc_host *hp, struct sdmmc_command *cmd) 1699 { 1700 struct sdhc_softc * const sc = hp->sc; 1701 uint16_t blksize = 0; 1702 uint16_t blkcount = 0; 1703 uint16_t mode; 1704 uint16_t command; 1705 uint32_t pmask; 1706 int error; 1707 1708 KASSERT(mutex_owned(&hp->intr_lock)); 1709 1710 DPRINTF(1,("%s: start cmd %d arg=%08x data=%p dlen=%d flags=%08x, status=%#x\n", 1711 HDEVNAME(hp), cmd->c_opcode, cmd->c_arg, cmd->c_data, 1712 cmd->c_datalen, cmd->c_flags, HREAD4(hp, SDHC_NINTR_STATUS))); 1713 1714 /* 1715 * The maximum block length for commands should be the minimum 1716 * of the host buffer size and the card buffer size. (1.7.2) 1717 */ 1718 1719 /* Fragment the data into proper blocks. */ 1720 if (cmd->c_datalen > 0) { 1721 blksize = MIN(cmd->c_datalen, cmd->c_blklen); 1722 blkcount = cmd->c_datalen / blksize; 1723 if (cmd->c_datalen % blksize > 0) { 1724 /* XXX: Split this command. (1.7.4) */ 1725 aprint_error_dev(sc->sc_dev, 1726 "data not a multiple of %u bytes\n", blksize); 1727 return EINVAL; 1728 } 1729 } 1730 1731 /* Check limit imposed by 9-bit block count. (1.7.2) */ 1732 if (blkcount > SDHC_BLOCK_COUNT_MAX) { 1733 aprint_error_dev(sc->sc_dev, "too much data\n"); 1734 return EINVAL; 1735 } 1736 1737 /* Prepare transfer mode register value. (2.2.5) */ 1738 mode = 0; 1739 if (ISSET(cmd->c_flags, SCF_CMD_READ)) 1740 mode |= SDHC_READ_MODE; 1741 if (blkcount > 0) { 1742 mode |= SDHC_BLOCK_COUNT_ENABLE; 1743 if (blkcount > 1) { 1744 mode |= SDHC_MULTI_BLOCK_MODE; 1745 if (!ISSET(sc->sc_flags, SDHC_FLAG_NO_AUTO_STOP) 1746 && !ISSET(cmd->c_flags, SCF_NO_STOP)) 1747 mode |= SDHC_AUTO_CMD12_ENABLE; 1748 } 1749 } 1750 if (cmd->c_dmamap != NULL && cmd->c_datalen > 0 && 1751 ISSET(hp->flags, SHF_MODE_DMAEN)) { 1752 mode |= SDHC_DMA_ENABLE; 1753 } 1754 1755 /* 1756 * Prepare command register value. (2.2.6) 1757 */ 1758 command = (cmd->c_opcode & SDHC_COMMAND_INDEX_MASK) << SDHC_COMMAND_INDEX_SHIFT; 1759 1760 if (ISSET(cmd->c_flags, SCF_RSP_CRC)) 1761 command |= SDHC_CRC_CHECK_ENABLE; 1762 if (ISSET(cmd->c_flags, SCF_RSP_IDX)) 1763 command |= SDHC_INDEX_CHECK_ENABLE; 1764 if (cmd->c_datalen > 0) 1765 command |= SDHC_DATA_PRESENT_SELECT; 1766 1767 if (!ISSET(cmd->c_flags, SCF_RSP_PRESENT)) 1768 command |= SDHC_NO_RESPONSE; 1769 else if (ISSET(cmd->c_flags, SCF_RSP_136)) 1770 command |= SDHC_RESP_LEN_136; 1771 else if (ISSET(cmd->c_flags, SCF_RSP_BSY)) 1772 command |= SDHC_RESP_LEN_48_CHK_BUSY; 1773 else 1774 command |= SDHC_RESP_LEN_48; 1775 1776 /* Wait until command and optionally data inhibit bits are clear. (1.5) */ 1777 pmask = SDHC_CMD_INHIBIT_CMD; 1778 if (cmd->c_flags & (SCF_CMD_ADTC|SCF_RSP_BSY)) 1779 pmask |= SDHC_CMD_INHIBIT_DAT; 1780 error = sdhc_wait_state(hp, pmask, 0); 1781 if (error) { 1782 (void) sdhc_soft_reset(hp, SDHC_RESET_DAT|SDHC_RESET_CMD); 1783 device_printf(sc->sc_dev, "command or data phase inhibited\n"); 1784 return error; 1785 } 1786 1787 DPRINTF(1,("%s: writing cmd: blksize=%d blkcnt=%d mode=%04x cmd=%04x\n", 1788 HDEVNAME(hp), blksize, blkcount, mode, command)); 1789 1790 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 1791 blksize |= (MAX(0, PAGE_SHIFT - 12) & SDHC_DMA_BOUNDARY_MASK) << 1792 SDHC_DMA_BOUNDARY_SHIFT; /* PAGE_SIZE DMA boundary */ 1793 } 1794 1795 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 1796 /* Alert the user not to remove the card. */ 1797 HSET1(hp, SDHC_HOST_CTL, SDHC_LED_ON); 1798 } 1799 1800 /* Set DMA start address. */ 1801 if (ISSET(hp->flags, SHF_USE_ADMA2_MASK) && cmd->c_data != NULL) { 1802 for (int seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) { 1803 bus_addr_t paddr = 1804 cmd->c_dmamap->dm_segs[seg].ds_addr; 1805 uint16_t len = 1806 cmd->c_dmamap->dm_segs[seg].ds_len == 65536 ? 1807 0 : cmd->c_dmamap->dm_segs[seg].ds_len; 1808 uint16_t attr = 1809 SDHC_ADMA2_VALID | SDHC_ADMA2_ACT_TRANS; 1810 if (seg == cmd->c_dmamap->dm_nsegs - 1) { 1811 attr |= SDHC_ADMA2_END; 1812 } 1813 if (ISSET(hp->flags, SHF_USE_ADMA2_32)) { 1814 struct sdhc_adma2_descriptor32 *desc = 1815 hp->adma2; 1816 desc[seg].attribute = htole16(attr); 1817 desc[seg].length = htole16(len); 1818 desc[seg].address = htole32(paddr); 1819 } else { 1820 struct sdhc_adma2_descriptor64 *desc = 1821 hp->adma2; 1822 desc[seg].attribute = htole16(attr); 1823 desc[seg].length = htole16(len); 1824 desc[seg].address = htole32(paddr & 0xffffffff); 1825 desc[seg].address_hi = htole32( 1826 (uint64_t)paddr >> 32); 1827 } 1828 } 1829 if (ISSET(hp->flags, SHF_USE_ADMA2_32)) { 1830 struct sdhc_adma2_descriptor32 *desc = hp->adma2; 1831 desc[cmd->c_dmamap->dm_nsegs].attribute = htole16(0); 1832 } else { 1833 struct sdhc_adma2_descriptor64 *desc = hp->adma2; 1834 desc[cmd->c_dmamap->dm_nsegs].attribute = htole16(0); 1835 } 1836 bus_dmamap_sync(sc->sc_dmat, hp->adma_map, 0, PAGE_SIZE, 1837 BUS_DMASYNC_PREWRITE); 1838 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1839 HCLR4(hp, SDHC_HOST_CTL, SDHC_USDHC_DMA_SELECT); 1840 HSET4(hp, SDHC_HOST_CTL, SDHC_USDHC_DMA_SELECT_ADMA2); 1841 } else { 1842 HCLR1(hp, SDHC_HOST_CTL, SDHC_DMA_SELECT); 1843 HSET1(hp, SDHC_HOST_CTL, SDHC_DMA_SELECT_ADMA2); 1844 } 1845 1846 const bus_addr_t desc_addr = hp->adma_map->dm_segs[0].ds_addr; 1847 1848 HWRITE4(hp, SDHC_ADMA_SYSTEM_ADDR, desc_addr & 0xffffffff); 1849 if (ISSET(hp->flags, SHF_USE_ADMA2_64)) { 1850 HWRITE4(hp, SDHC_ADMA_SYSTEM_ADDR + 4, 1851 (uint64_t)desc_addr >> 32); 1852 } 1853 } else if (ISSET(mode, SDHC_DMA_ENABLE) && 1854 !ISSET(sc->sc_flags, SDHC_FLAG_EXTERNAL_DMA)) { 1855 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1856 HCLR4(hp, SDHC_HOST_CTL, SDHC_USDHC_DMA_SELECT); 1857 } 1858 HWRITE4(hp, SDHC_DMA_ADDR, cmd->c_dmamap->dm_segs[0].ds_addr); 1859 } 1860 1861 /* 1862 * Start a CPU data transfer. Writing to the high order byte 1863 * of the SDHC_COMMAND register triggers the SD command. (1.5) 1864 */ 1865 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 1866 HWRITE4(hp, SDHC_BLOCK_SIZE, blksize | (blkcount << 16)); 1867 HWRITE4(hp, SDHC_ARGUMENT, cmd->c_arg); 1868 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_USDHC)) { 1869 /* mode bits is in MIX_CTRL register on uSDHC */ 1870 HWRITE4(hp, SDHC_MIX_CTRL, mode | 1871 (HREAD4(hp, SDHC_MIX_CTRL) & ~SDHC_TRANSFER_MODE_MASK)); 1872 if (cmd->c_opcode == MMC_STOP_TRANSMISSION) 1873 command |= SDHC_COMMAND_TYPE_ABORT; 1874 HWRITE4(hp, SDHC_TRANSFER_MODE, command << 16); 1875 } else { 1876 HWRITE4(hp, SDHC_TRANSFER_MODE, mode | (command << 16)); 1877 } 1878 } else { 1879 HWRITE2(hp, SDHC_BLOCK_SIZE, blksize); 1880 HWRITE2(hp, SDHC_BLOCK_COUNT, blkcount); 1881 HWRITE4(hp, SDHC_ARGUMENT, cmd->c_arg); 1882 HWRITE2(hp, SDHC_TRANSFER_MODE, mode); 1883 HWRITE2(hp, SDHC_COMMAND, command); 1884 } 1885 1886 return 0; 1887 } 1888 1889 static void 1890 sdhc_transfer_data(struct sdhc_host *hp, struct sdmmc_command *cmd) 1891 { 1892 struct sdhc_softc *sc = hp->sc; 1893 int error; 1894 1895 KASSERT(mutex_owned(&hp->intr_lock)); 1896 1897 DPRINTF(1,("%s: data transfer: resp=%08x datalen=%u\n", HDEVNAME(hp), 1898 MMC_R1(cmd->c_resp), cmd->c_datalen)); 1899 1900 #ifdef SDHC_DEBUG 1901 /* XXX I forgot why I wanted to know when this happens :-( */ 1902 if ((cmd->c_opcode == 52 || cmd->c_opcode == 53) && 1903 ISSET(MMC_R1(cmd->c_resp), 0xcb00)) { 1904 aprint_error_dev(hp->sc->sc_dev, 1905 "CMD52/53 error response flags %#x\n", 1906 MMC_R1(cmd->c_resp) & 0xff00); 1907 } 1908 #endif 1909 1910 if (cmd->c_dmamap != NULL) { 1911 if (hp->sc->sc_vendor_transfer_data_dma != NULL) { 1912 error = hp->sc->sc_vendor_transfer_data_dma(sc, cmd); 1913 if (error == 0 && !sdhc_wait_intr(hp, 1914 SDHC_TRANSFER_COMPLETE, SDHC_DMA_TIMEOUT, false)) { 1915 DPRINTF(1,("%s: timeout\n", __func__)); 1916 error = ETIMEDOUT; 1917 } 1918 } else { 1919 error = sdhc_transfer_data_dma(hp, cmd); 1920 } 1921 } else 1922 error = sdhc_transfer_data_pio(hp, cmd); 1923 if (error) 1924 cmd->c_error = error; 1925 SET(cmd->c_flags, SCF_ITSDONE); 1926 1927 DPRINTF(1,("%s: data transfer done (error=%d)\n", 1928 HDEVNAME(hp), cmd->c_error)); 1929 } 1930 1931 static int 1932 sdhc_transfer_data_dma(struct sdhc_host *hp, struct sdmmc_command *cmd) 1933 { 1934 bus_dma_segment_t *dm_segs = cmd->c_dmamap->dm_segs; 1935 bus_addr_t posaddr; 1936 bus_addr_t segaddr; 1937 bus_size_t seglen; 1938 u_int seg = 0; 1939 int error = 0; 1940 int status; 1941 1942 KASSERT(mutex_owned(&hp->intr_lock)); 1943 KASSERT(HREAD2(hp, SDHC_NINTR_STATUS_EN) & SDHC_DMA_INTERRUPT); 1944 KASSERT(HREAD2(hp, SDHC_NINTR_SIGNAL_EN) & SDHC_DMA_INTERRUPT); 1945 KASSERT(HREAD2(hp, SDHC_NINTR_STATUS_EN) & SDHC_TRANSFER_COMPLETE); 1946 KASSERT(HREAD2(hp, SDHC_NINTR_SIGNAL_EN) & SDHC_TRANSFER_COMPLETE); 1947 1948 for (;;) { 1949 status = sdhc_wait_intr(hp, 1950 SDHC_DMA_INTERRUPT|SDHC_TRANSFER_COMPLETE, 1951 SDHC_DMA_TIMEOUT, false); 1952 1953 if (status & SDHC_TRANSFER_COMPLETE) { 1954 break; 1955 } 1956 if (!status) { 1957 DPRINTF(1,("%s: timeout\n", __func__)); 1958 error = ETIMEDOUT; 1959 break; 1960 } 1961 1962 if (ISSET(hp->flags, SHF_USE_ADMA2_MASK)) { 1963 continue; 1964 } 1965 1966 if ((status & SDHC_DMA_INTERRUPT) == 0) { 1967 continue; 1968 } 1969 1970 /* DMA Interrupt (boundary crossing) */ 1971 1972 segaddr = dm_segs[seg].ds_addr; 1973 seglen = dm_segs[seg].ds_len; 1974 posaddr = HREAD4(hp, SDHC_DMA_ADDR); 1975 1976 if ((seg == (cmd->c_dmamap->dm_nsegs-1)) && (posaddr == (segaddr + seglen))) { 1977 continue; 1978 } 1979 if ((posaddr >= segaddr) && (posaddr < (segaddr + seglen))) 1980 HWRITE4(hp, SDHC_DMA_ADDR, posaddr); 1981 else if ((posaddr >= segaddr) && (posaddr == (segaddr + seglen)) && (seg + 1) < cmd->c_dmamap->dm_nsegs) 1982 HWRITE4(hp, SDHC_DMA_ADDR, dm_segs[++seg].ds_addr); 1983 KASSERT(seg < cmd->c_dmamap->dm_nsegs); 1984 } 1985 1986 if (ISSET(hp->flags, SHF_USE_ADMA2_MASK)) { 1987 bus_dmamap_sync(hp->sc->sc_dmat, hp->adma_map, 0, 1988 PAGE_SIZE, BUS_DMASYNC_POSTWRITE); 1989 } 1990 1991 return error; 1992 } 1993 1994 static int 1995 sdhc_transfer_data_pio(struct sdhc_host *hp, struct sdmmc_command *cmd) 1996 { 1997 uint8_t *data = cmd->c_data; 1998 void (*pio_func)(struct sdhc_host *, uint8_t *, u_int); 1999 u_int len, datalen; 2000 u_int imask; 2001 u_int pmask; 2002 int error = 0; 2003 2004 KASSERT(mutex_owned(&hp->intr_lock)); 2005 2006 if (ISSET(cmd->c_flags, SCF_CMD_READ)) { 2007 imask = SDHC_BUFFER_READ_READY; 2008 pmask = SDHC_BUFFER_READ_ENABLE; 2009 if (ISSET(hp->sc->sc_flags, 2010 SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 2011 pio_func = esdhc_read_data_pio; 2012 } else { 2013 pio_func = sdhc_read_data_pio; 2014 } 2015 } else { 2016 imask = SDHC_BUFFER_WRITE_READY; 2017 pmask = SDHC_BUFFER_WRITE_ENABLE; 2018 if (ISSET(hp->sc->sc_flags, 2019 SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 2020 pio_func = esdhc_write_data_pio; 2021 } else { 2022 pio_func = sdhc_write_data_pio; 2023 } 2024 } 2025 datalen = cmd->c_datalen; 2026 2027 KASSERT(mutex_owned(&hp->intr_lock)); 2028 KASSERT(HREAD2(hp, SDHC_NINTR_STATUS_EN) & imask); 2029 KASSERT(HREAD2(hp, SDHC_NINTR_STATUS_EN) & SDHC_TRANSFER_COMPLETE); 2030 KASSERT(HREAD2(hp, SDHC_NINTR_SIGNAL_EN) & SDHC_TRANSFER_COMPLETE); 2031 2032 while (datalen > 0) { 2033 if (!ISSET(HREAD4(hp, SDHC_PRESENT_STATE), pmask)) { 2034 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 2035 HSET4(hp, SDHC_NINTR_SIGNAL_EN, imask); 2036 } else { 2037 HSET2(hp, SDHC_NINTR_SIGNAL_EN, imask); 2038 } 2039 if (!sdhc_wait_intr(hp, imask, SDHC_BUFFER_TIMEOUT, false)) { 2040 DPRINTF(1,("%s: timeout\n", __func__)); 2041 error = ETIMEDOUT; 2042 break; 2043 } 2044 2045 error = sdhc_wait_state(hp, pmask, pmask); 2046 if (error) 2047 break; 2048 } 2049 2050 len = MIN(datalen, cmd->c_blklen); 2051 (*pio_func)(hp, data, len); 2052 DPRINTF(2,("%s: pio data transfer %u @ %p\n", 2053 HDEVNAME(hp), len, data)); 2054 2055 data += len; 2056 datalen -= len; 2057 } 2058 2059 if (error == 0 && !sdhc_wait_intr(hp, SDHC_TRANSFER_COMPLETE, 2060 SDHC_TRANSFER_TIMEOUT, false)) { 2061 DPRINTF(1,("%s: timeout for transfer\n", __func__)); 2062 error = ETIMEDOUT; 2063 } 2064 2065 return error; 2066 } 2067 2068 static void 2069 sdhc_read_data_pio(struct sdhc_host *hp, uint8_t *data, u_int datalen) 2070 { 2071 2072 if (((__uintptr_t)data & 3) == 0) { 2073 while (datalen > 3) { 2074 *(uint32_t *)data = le32toh(HREAD4(hp, SDHC_DATA)); 2075 data += 4; 2076 datalen -= 4; 2077 } 2078 if (datalen > 1) { 2079 *(uint16_t *)data = le16toh(HREAD2(hp, SDHC_DATA)); 2080 data += 2; 2081 datalen -= 2; 2082 } 2083 if (datalen > 0) { 2084 *data = HREAD1(hp, SDHC_DATA); 2085 data += 1; 2086 datalen -= 1; 2087 } 2088 } else if (((__uintptr_t)data & 1) == 0) { 2089 while (datalen > 1) { 2090 *(uint16_t *)data = le16toh(HREAD2(hp, SDHC_DATA)); 2091 data += 2; 2092 datalen -= 2; 2093 } 2094 if (datalen > 0) { 2095 *data = HREAD1(hp, SDHC_DATA); 2096 data += 1; 2097 datalen -= 1; 2098 } 2099 } else { 2100 while (datalen > 0) { 2101 *data = HREAD1(hp, SDHC_DATA); 2102 data += 1; 2103 datalen -= 1; 2104 } 2105 } 2106 } 2107 2108 static void 2109 sdhc_write_data_pio(struct sdhc_host *hp, uint8_t *data, u_int datalen) 2110 { 2111 2112 if (((__uintptr_t)data & 3) == 0) { 2113 while (datalen > 3) { 2114 HWRITE4(hp, SDHC_DATA, htole32(*(uint32_t *)data)); 2115 data += 4; 2116 datalen -= 4; 2117 } 2118 if (datalen > 1) { 2119 HWRITE2(hp, SDHC_DATA, htole16(*(uint16_t *)data)); 2120 data += 2; 2121 datalen -= 2; 2122 } 2123 if (datalen > 0) { 2124 HWRITE1(hp, SDHC_DATA, *data); 2125 data += 1; 2126 datalen -= 1; 2127 } 2128 } else if (((__uintptr_t)data & 1) == 0) { 2129 while (datalen > 1) { 2130 HWRITE2(hp, SDHC_DATA, htole16(*(uint16_t *)data)); 2131 data += 2; 2132 datalen -= 2; 2133 } 2134 if (datalen > 0) { 2135 HWRITE1(hp, SDHC_DATA, *data); 2136 data += 1; 2137 datalen -= 1; 2138 } 2139 } else { 2140 while (datalen > 0) { 2141 HWRITE1(hp, SDHC_DATA, *data); 2142 data += 1; 2143 datalen -= 1; 2144 } 2145 } 2146 } 2147 2148 static void 2149 esdhc_read_data_pio(struct sdhc_host *hp, uint8_t *data, u_int datalen) 2150 { 2151 uint16_t status = HREAD2(hp, SDHC_NINTR_STATUS); 2152 uint32_t v; 2153 2154 const size_t watermark = (HREAD4(hp, SDHC_WATERMARK_LEVEL) >> SDHC_WATERMARK_READ_SHIFT) & SDHC_WATERMARK_READ_MASK; 2155 size_t count = 0; 2156 2157 while (datalen > 3 && !ISSET(status, SDHC_TRANSFER_COMPLETE)) { 2158 if (count == 0) { 2159 /* 2160 * If we've drained "watermark" words, we need to wait 2161 * a little bit so the read FIFO can refill. 2162 */ 2163 sdmmc_delay(10); 2164 count = watermark; 2165 } 2166 v = HREAD4(hp, SDHC_DATA); 2167 v = le32toh(v); 2168 *(uint32_t *)data = v; 2169 data += 4; 2170 datalen -= 4; 2171 status = HREAD2(hp, SDHC_NINTR_STATUS); 2172 count--; 2173 } 2174 if (datalen > 0 && !ISSET(status, SDHC_TRANSFER_COMPLETE)) { 2175 if (count == 0) { 2176 sdmmc_delay(10); 2177 } 2178 v = HREAD4(hp, SDHC_DATA); 2179 v = le32toh(v); 2180 do { 2181 *data++ = v; 2182 v >>= 8; 2183 } while (--datalen > 0); 2184 } 2185 } 2186 2187 static void 2188 esdhc_write_data_pio(struct sdhc_host *hp, uint8_t *data, u_int datalen) 2189 { 2190 uint16_t status = HREAD2(hp, SDHC_NINTR_STATUS); 2191 uint32_t v; 2192 2193 const size_t watermark = (HREAD4(hp, SDHC_WATERMARK_LEVEL) >> SDHC_WATERMARK_WRITE_SHIFT) & SDHC_WATERMARK_WRITE_MASK; 2194 size_t count = watermark; 2195 2196 while (datalen > 3 && !ISSET(status, SDHC_TRANSFER_COMPLETE)) { 2197 if (count == 0) { 2198 sdmmc_delay(10); 2199 count = watermark; 2200 } 2201 v = *(uint32_t *)data; 2202 v = htole32(v); 2203 HWRITE4(hp, SDHC_DATA, v); 2204 data += 4; 2205 datalen -= 4; 2206 status = HREAD2(hp, SDHC_NINTR_STATUS); 2207 count--; 2208 } 2209 if (datalen > 0 && !ISSET(status, SDHC_TRANSFER_COMPLETE)) { 2210 if (count == 0) { 2211 sdmmc_delay(10); 2212 } 2213 v = *(uint32_t *)data; 2214 v = htole32(v); 2215 HWRITE4(hp, SDHC_DATA, v); 2216 } 2217 } 2218 2219 /* Prepare for another command. */ 2220 static int 2221 sdhc_soft_reset(struct sdhc_host *hp, int mask) 2222 { 2223 int timo; 2224 2225 KASSERT(mutex_owned(&hp->intr_lock)); 2226 2227 DPRINTF(1,("%s: software reset reg=%08x\n", HDEVNAME(hp), mask)); 2228 2229 /* Request the reset. */ 2230 HWRITE1(hp, SDHC_SOFTWARE_RESET, mask); 2231 2232 /* 2233 * If necessary, wait for the controller to set the bits to 2234 * acknowledge the reset. 2235 */ 2236 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_WAIT_RESET) && 2237 ISSET(mask, (SDHC_RESET_DAT | SDHC_RESET_CMD))) { 2238 for (timo = 10000; timo > 0; timo--) { 2239 if (ISSET(HREAD1(hp, SDHC_SOFTWARE_RESET), mask)) 2240 break; 2241 /* Short delay because I worry we may miss it... */ 2242 sdmmc_delay(1); 2243 } 2244 if (timo == 0) { 2245 DPRINTF(1,("%s: timeout for reset on\n", __func__)); 2246 return ETIMEDOUT; 2247 } 2248 } 2249 2250 /* 2251 * Wait for the controller to clear the bits to indicate that 2252 * the reset has completed. 2253 */ 2254 for (timo = 10; timo > 0; timo--) { 2255 if (!ISSET(HREAD1(hp, SDHC_SOFTWARE_RESET), mask)) 2256 break; 2257 sdmmc_delay(10000); 2258 } 2259 if (timo == 0) { 2260 DPRINTF(1,("%s: timeout reg=%08x\n", HDEVNAME(hp), 2261 HREAD1(hp, SDHC_SOFTWARE_RESET))); 2262 return ETIMEDOUT; 2263 } 2264 2265 if (ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) { 2266 HSET4(hp, SDHC_DMA_CTL, SDHC_DMA_SNOOP); 2267 } 2268 2269 return 0; 2270 } 2271 2272 static int 2273 sdhc_wait_intr(struct sdhc_host *hp, int mask, int timo, bool probing) 2274 { 2275 int status, error, nointr; 2276 2277 KASSERT(mutex_owned(&hp->intr_lock)); 2278 2279 mask |= SDHC_ERROR_INTERRUPT; 2280 2281 nointr = 0; 2282 status = hp->intr_status & mask; 2283 while (status == 0) { 2284 if (cv_timedwait(&hp->intr_cv, &hp->intr_lock, timo) 2285 == EWOULDBLOCK) { 2286 nointr = 1; 2287 break; 2288 } 2289 status = hp->intr_status & mask; 2290 } 2291 error = hp->intr_error_status; 2292 2293 DPRINTF(2,("%s: intr status %#x error %#x\n", HDEVNAME(hp), status, 2294 error)); 2295 2296 hp->intr_status &= ~status; 2297 hp->intr_error_status &= ~error; 2298 2299 if (ISSET(status, SDHC_ERROR_INTERRUPT)) { 2300 if (ISSET(error, SDHC_DMA_ERROR)) 2301 device_printf(hp->sc->sc_dev,"dma error\n"); 2302 if (ISSET(error, SDHC_ADMA_ERROR)) 2303 device_printf(hp->sc->sc_dev,"adma error\n"); 2304 if (ISSET(error, SDHC_AUTO_CMD12_ERROR)) 2305 device_printf(hp->sc->sc_dev,"auto_cmd12 error\n"); 2306 if (ISSET(error, SDHC_CURRENT_LIMIT_ERROR)) 2307 device_printf(hp->sc->sc_dev,"current limit error\n"); 2308 if (ISSET(error, SDHC_DATA_END_BIT_ERROR)) 2309 device_printf(hp->sc->sc_dev,"data end bit error\n"); 2310 if (ISSET(error, SDHC_DATA_CRC_ERROR)) 2311 device_printf(hp->sc->sc_dev,"data crc error\n"); 2312 if (ISSET(error, SDHC_DATA_TIMEOUT_ERROR)) 2313 device_printf(hp->sc->sc_dev,"data timeout error\n"); 2314 if (ISSET(error, SDHC_CMD_INDEX_ERROR)) 2315 device_printf(hp->sc->sc_dev,"cmd index error\n"); 2316 if (ISSET(error, SDHC_CMD_END_BIT_ERROR)) 2317 device_printf(hp->sc->sc_dev,"cmd end bit error\n"); 2318 if (ISSET(error, SDHC_CMD_CRC_ERROR)) 2319 device_printf(hp->sc->sc_dev,"cmd crc error\n"); 2320 if (ISSET(error, SDHC_CMD_TIMEOUT_ERROR)) { 2321 if (!probing) 2322 device_printf(hp->sc->sc_dev,"cmd timeout error\n"); 2323 #ifdef SDHC_DEBUG 2324 else if (sdhcdebug > 0) 2325 device_printf(hp->sc->sc_dev,"cmd timeout (expected)\n"); 2326 #endif 2327 } 2328 if ((error & ~SDHC_EINTR_STATUS_MASK) != 0) 2329 device_printf(hp->sc->sc_dev,"vendor error %#x\n", 2330 (error & ~SDHC_EINTR_STATUS_MASK)); 2331 if (error == 0) 2332 device_printf(hp->sc->sc_dev,"no error\n"); 2333 2334 /* Command timeout has higher priority than command complete. */ 2335 if (ISSET(error, SDHC_CMD_TIMEOUT_ERROR)) 2336 CLR(status, SDHC_COMMAND_COMPLETE); 2337 2338 /* Transfer complete has higher priority than data timeout. */ 2339 if (ISSET(status, SDHC_TRANSFER_COMPLETE)) 2340 CLR(error, SDHC_DATA_TIMEOUT_ERROR); 2341 } 2342 2343 if (nointr || 2344 (ISSET(status, SDHC_ERROR_INTERRUPT) && error)) { 2345 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) 2346 (void)sdhc_soft_reset(hp, SDHC_RESET_CMD|SDHC_RESET_DAT); 2347 hp->intr_error_status = 0; 2348 status = 0; 2349 } 2350 2351 return status; 2352 } 2353 2354 /* 2355 * Established by attachment driver at interrupt priority IPL_SDMMC. 2356 */ 2357 int 2358 sdhc_intr(void *arg) 2359 { 2360 struct sdhc_softc *sc = (struct sdhc_softc *)arg; 2361 struct sdhc_host *hp; 2362 int done = 0; 2363 uint16_t status; 2364 uint16_t error; 2365 2366 /* We got an interrupt, but we don't know from which slot. */ 2367 for (size_t host = 0; host < sc->sc_nhosts; host++) { 2368 hp = sc->sc_host[host]; 2369 if (hp == NULL) 2370 continue; 2371 2372 mutex_enter(&hp->intr_lock); 2373 2374 if (ISSET(sc->sc_flags, SDHC_FLAG_32BIT_ACCESS)) { 2375 /* Find out which interrupts are pending. */ 2376 uint32_t xstatus = HREAD4(hp, SDHC_NINTR_STATUS); 2377 status = xstatus; 2378 error = xstatus >> 16; 2379 if (ISSET(sc->sc_flags, SDHC_FLAG_USDHC) && 2380 (xstatus & SDHC_TRANSFER_COMPLETE) && 2381 !(xstatus & SDHC_DMA_INTERRUPT)) { 2382 /* read again due to uSDHC errata */ 2383 status = xstatus = HREAD4(hp, 2384 SDHC_NINTR_STATUS); 2385 error = xstatus >> 16; 2386 } 2387 if (ISSET(sc->sc_flags, 2388 SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 2389 if ((error & SDHC_NINTR_STATUS_MASK) != 0) 2390 SET(status, SDHC_ERROR_INTERRUPT); 2391 } 2392 if (error) 2393 xstatus |= SDHC_ERROR_INTERRUPT; 2394 else if (!ISSET(status, SDHC_NINTR_STATUS_MASK)) 2395 goto next_port; /* no interrupt for us */ 2396 /* Acknowledge the interrupts we are about to handle. */ 2397 HWRITE4(hp, SDHC_NINTR_STATUS, xstatus); 2398 } else { 2399 /* Find out which interrupts are pending. */ 2400 error = 0; 2401 status = HREAD2(hp, SDHC_NINTR_STATUS); 2402 if (!ISSET(status, SDHC_NINTR_STATUS_MASK)) 2403 goto next_port; /* no interrupt for us */ 2404 /* Acknowledge the interrupts we are about to handle. */ 2405 HWRITE2(hp, SDHC_NINTR_STATUS, status); 2406 if (ISSET(status, SDHC_ERROR_INTERRUPT)) { 2407 /* Acknowledge error interrupts. */ 2408 error = HREAD2(hp, SDHC_EINTR_STATUS); 2409 HWRITE2(hp, SDHC_EINTR_STATUS, error); 2410 } 2411 } 2412 2413 DPRINTF(2,("%s: interrupt status=%x error=%x\n", HDEVNAME(hp), 2414 status, error)); 2415 2416 /* Claim this interrupt. */ 2417 done = 1; 2418 2419 if (ISSET(status, SDHC_ERROR_INTERRUPT) && 2420 ISSET(error, SDHC_ADMA_ERROR)) { 2421 uint8_t adma_err = HREAD1(hp, SDHC_ADMA_ERROR_STATUS); 2422 printf("%s: ADMA error, status %02x\n", HDEVNAME(hp), 2423 adma_err); 2424 } 2425 2426 /* 2427 * Wake up the sdmmc event thread to scan for cards. 2428 */ 2429 if (ISSET(status, SDHC_CARD_REMOVAL|SDHC_CARD_INSERTION)) { 2430 if (hp->sdmmc != NULL) { 2431 sdmmc_needs_discover(hp->sdmmc); 2432 } 2433 if (ISSET(sc->sc_flags, 2434 SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 2435 HCLR4(hp, SDHC_NINTR_STATUS_EN, 2436 status & (SDHC_CARD_REMOVAL|SDHC_CARD_INSERTION)); 2437 HCLR4(hp, SDHC_NINTR_SIGNAL_EN, 2438 status & (SDHC_CARD_REMOVAL|SDHC_CARD_INSERTION)); 2439 } 2440 } 2441 2442 /* 2443 * Schedule re-tuning process (UHS). 2444 */ 2445 if (ISSET(status, SDHC_RETUNING_EVENT)) { 2446 atomic_swap_uint(&hp->tuning_timer_pending, 1); 2447 } 2448 2449 /* 2450 * Wake up the blocking process to service command 2451 * related interrupt(s). 2452 */ 2453 if (ISSET(status, SDHC_COMMAND_COMPLETE|SDHC_ERROR_INTERRUPT| 2454 SDHC_BUFFER_READ_READY|SDHC_BUFFER_WRITE_READY| 2455 SDHC_TRANSFER_COMPLETE|SDHC_DMA_INTERRUPT)) { 2456 hp->intr_error_status |= error; 2457 hp->intr_status |= status; 2458 if (ISSET(sc->sc_flags, 2459 SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC)) { 2460 HCLR4(hp, SDHC_NINTR_SIGNAL_EN, 2461 status & (SDHC_BUFFER_READ_READY|SDHC_BUFFER_WRITE_READY)); 2462 } 2463 cv_broadcast(&hp->intr_cv); 2464 } 2465 2466 /* 2467 * Service SD card interrupts. 2468 */ 2469 if (!ISSET(sc->sc_flags, SDHC_FLAG_ENHANCED | SDHC_FLAG_USDHC) 2470 && ISSET(status, SDHC_CARD_INTERRUPT)) { 2471 DPRINTF(0,("%s: card interrupt\n", HDEVNAME(hp))); 2472 HCLR2(hp, SDHC_NINTR_STATUS_EN, SDHC_CARD_INTERRUPT); 2473 sdmmc_card_intr(hp->sdmmc); 2474 } 2475 next_port: 2476 mutex_exit(&hp->intr_lock); 2477 } 2478 2479 return done; 2480 } 2481 2482 kmutex_t * 2483 sdhc_host_lock(struct sdhc_host *hp) 2484 { 2485 return &hp->intr_lock; 2486 } 2487 2488 uint8_t 2489 sdhc_host_read_1(struct sdhc_host *hp, int reg) 2490 { 2491 return HREAD1(hp, reg); 2492 } 2493 2494 uint16_t 2495 sdhc_host_read_2(struct sdhc_host *hp, int reg) 2496 { 2497 return HREAD2(hp, reg); 2498 } 2499 2500 uint32_t 2501 sdhc_host_read_4(struct sdhc_host *hp, int reg) 2502 { 2503 return HREAD4(hp, reg); 2504 } 2505 2506 void 2507 sdhc_host_write_1(struct sdhc_host *hp, int reg, uint8_t val) 2508 { 2509 HWRITE1(hp, reg, val); 2510 } 2511 2512 void 2513 sdhc_host_write_2(struct sdhc_host *hp, int reg, uint16_t val) 2514 { 2515 HWRITE2(hp, reg, val); 2516 } 2517 2518 void 2519 sdhc_host_write_4(struct sdhc_host *hp, int reg, uint32_t val) 2520 { 2521 HWRITE4(hp, reg, val); 2522 } 2523 2524 #ifdef SDHC_DEBUG 2525 void 2526 sdhc_dump_regs(struct sdhc_host *hp) 2527 { 2528 2529 printf("0x%02x PRESENT_STATE: %x\n", SDHC_PRESENT_STATE, 2530 HREAD4(hp, SDHC_PRESENT_STATE)); 2531 if (!ISSET(hp->sc->sc_flags, SDHC_FLAG_ENHANCED)) 2532 printf("0x%02x POWER_CTL: %x\n", SDHC_POWER_CTL, 2533 HREAD1(hp, SDHC_POWER_CTL)); 2534 printf("0x%02x NINTR_STATUS: %x\n", SDHC_NINTR_STATUS, 2535 HREAD2(hp, SDHC_NINTR_STATUS)); 2536 printf("0x%02x EINTR_STATUS: %x\n", SDHC_EINTR_STATUS, 2537 HREAD2(hp, SDHC_EINTR_STATUS)); 2538 printf("0x%02x NINTR_STATUS_EN: %x\n", SDHC_NINTR_STATUS_EN, 2539 HREAD2(hp, SDHC_NINTR_STATUS_EN)); 2540 printf("0x%02x EINTR_STATUS_EN: %x\n", SDHC_EINTR_STATUS_EN, 2541 HREAD2(hp, SDHC_EINTR_STATUS_EN)); 2542 printf("0x%02x NINTR_SIGNAL_EN: %x\n", SDHC_NINTR_SIGNAL_EN, 2543 HREAD2(hp, SDHC_NINTR_SIGNAL_EN)); 2544 printf("0x%02x EINTR_SIGNAL_EN: %x\n", SDHC_EINTR_SIGNAL_EN, 2545 HREAD2(hp, SDHC_EINTR_SIGNAL_EN)); 2546 printf("0x%02x CAPABILITIES: %x\n", SDHC_CAPABILITIES, 2547 HREAD4(hp, SDHC_CAPABILITIES)); 2548 printf("0x%02x MAX_CAPABILITIES: %x\n", SDHC_MAX_CAPABILITIES, 2549 HREAD4(hp, SDHC_MAX_CAPABILITIES)); 2550 } 2551 #endif 2552
Indexes created Mon Sep 22 05:09:51 GMT 2025