1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org> 5 * Copyright (c) 2017 Marius Strobl <marius@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bus.h> 32 #include <sys/callout.h> 33 #include <sys/conf.h> 34 #include <sys/kernel.h> 35 #include <sys/kobj.h> 36 #include <sys/libkern.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/resource.h> 42 #include <sys/rman.h> 43 #include <sys/sysctl.h> 44 #include <sys/taskqueue.h> 45 #include <sys/sbuf.h> 46 47 #include <machine/bus.h> 48 #include <machine/resource.h> 49 #include <machine/stdarg.h> 50 51 #include <dev/mmc/bridge.h> 52 #include <dev/mmc/mmcreg.h> 53 #include <dev/mmc/mmcbrvar.h> 54 55 #include <dev/sdhci/sdhci.h> 56 57 #include <cam/cam.h> 58 #include <cam/cam_ccb.h> 59 #include <cam/cam_debug.h> 60 #include <cam/cam_sim.h> 61 #include <cam/cam_xpt_sim.h> 62 63 #include "mmcbr_if.h" 64 #include "sdhci_if.h" 65 66 #include "opt_mmccam.h" 67 68 SYSCTL_NODE(_hw, OID_AUTO, sdhci, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 69 "sdhci driver"); 70 71 static int sdhci_debug = 0; 72 SYSCTL_INT(_hw_sdhci, OID_AUTO, debug, CTLFLAG_RWTUN, &sdhci_debug, 0, 73 "Debug level"); 74 u_int sdhci_quirk_clear = 0; 75 SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_clear, CTLFLAG_RWTUN, &sdhci_quirk_clear, 76 0, "Mask of quirks to clear"); 77 u_int sdhci_quirk_set = 0; 78 SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_set, CTLFLAG_RWTUN, &sdhci_quirk_set, 0, 79 "Mask of quirks to set"); 80 81 #define RD1(slot, off) SDHCI_READ_1((slot)->bus, (slot), (off)) 82 #define RD2(slot, off) SDHCI_READ_2((slot)->bus, (slot), (off)) 83 #define RD4(slot, off) SDHCI_READ_4((slot)->bus, (slot), (off)) 84 #define RD_MULTI_4(slot, off, ptr, count) \ 85 SDHCI_READ_MULTI_4((slot)->bus, (slot), (off), (ptr), (count)) 86 87 #define WR1(slot, off, val) SDHCI_WRITE_1((slot)->bus, (slot), (off), (val)) 88 #define WR2(slot, off, val) SDHCI_WRITE_2((slot)->bus, (slot), (off), (val)) 89 #define WR4(slot, off, val) SDHCI_WRITE_4((slot)->bus, (slot), (off), (val)) 90 #define WR_MULTI_4(slot, off, ptr, count) \ 91 SDHCI_WRITE_MULTI_4((slot)->bus, (slot), (off), (ptr), (count)) 92 93 static void sdhci_acmd_irq(struct sdhci_slot *slot, uint16_t acmd_err); 94 static void sdhci_card_poll(void *arg); 95 static void sdhci_card_task(void *arg, int pending); 96 static void sdhci_cmd_irq(struct sdhci_slot *slot, uint32_t intmask); 97 static void sdhci_data_irq(struct sdhci_slot *slot, uint32_t intmask); 98 static int sdhci_exec_tuning(struct sdhci_slot *slot, bool reset); 99 static void sdhci_handle_card_present_locked(struct sdhci_slot *slot, 100 bool is_present); 101 static void sdhci_finish_command(struct sdhci_slot *slot); 102 static void sdhci_init(struct sdhci_slot *slot); 103 static void sdhci_read_block_pio(struct sdhci_slot *slot); 104 static void sdhci_req_done(struct sdhci_slot *slot); 105 static void sdhci_req_wakeup(struct mmc_request *req); 106 static void sdhci_retune(void *arg); 107 static void sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock); 108 static void sdhci_set_power(struct sdhci_slot *slot, u_char power); 109 static void sdhci_set_transfer_mode(struct sdhci_slot *slot, 110 const struct mmc_data *data); 111 static void sdhci_start(struct sdhci_slot *slot); 112 static void sdhci_timeout(void *arg); 113 static void sdhci_start_command(struct sdhci_slot *slot, 114 struct mmc_command *cmd); 115 static void sdhci_start_data(struct sdhci_slot *slot, 116 const struct mmc_data *data); 117 static void sdhci_write_block_pio(struct sdhci_slot *slot); 118 static void sdhci_transfer_pio(struct sdhci_slot *slot); 119 120 #ifdef MMCCAM 121 /* CAM-related */ 122 static void sdhci_cam_action(struct cam_sim *sim, union ccb *ccb); 123 static int sdhci_cam_get_possible_host_clock(const struct sdhci_slot *slot, 124 int proposed_clock); 125 static void sdhci_cam_poll(struct cam_sim *sim); 126 static int sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb); 127 static int sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb); 128 static int sdhci_cam_update_ios(struct sdhci_slot *slot); 129 #endif 130 131 /* helper routines */ 132 static int sdhci_dma_alloc(struct sdhci_slot *slot); 133 static void sdhci_dma_free(struct sdhci_slot *slot); 134 static void sdhci_dumpcaps(struct sdhci_slot *slot); 135 static void sdhci_dumpcaps_buf(struct sdhci_slot *slot, struct sbuf *s); 136 static void sdhci_dumpregs(struct sdhci_slot *slot); 137 static void sdhci_dumpregs_buf(struct sdhci_slot *slot, struct sbuf *s); 138 static int sdhci_syctl_dumpcaps(SYSCTL_HANDLER_ARGS); 139 static int sdhci_syctl_dumpregs(SYSCTL_HANDLER_ARGS); 140 static void sdhci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, 141 int error); 142 static int slot_printf(const struct sdhci_slot *slot, const char * fmt, ...) 143 __printflike(2, 3); 144 static int slot_sprintf(const struct sdhci_slot *slot, struct sbuf *s, 145 const char * fmt, ...) __printflike(3, 4); 146 static uint32_t sdhci_tuning_intmask(const struct sdhci_slot *slot); 147 148 #define SDHCI_LOCK(_slot) mtx_lock(&(_slot)->mtx) 149 #define SDHCI_UNLOCK(_slot) mtx_unlock(&(_slot)->mtx) 150 #define SDHCI_LOCK_INIT(_slot) \ 151 mtx_init(&_slot->mtx, "SD slot mtx", "sdhci", MTX_DEF) 152 #define SDHCI_LOCK_DESTROY(_slot) mtx_destroy(&_slot->mtx); 153 #define SDHCI_ASSERT_LOCKED(_slot) mtx_assert(&_slot->mtx, MA_OWNED); 154 #define SDHCI_ASSERT_UNLOCKED(_slot) mtx_assert(&_slot->mtx, MA_NOTOWNED); 155 156 #define SDHCI_DEFAULT_MAX_FREQ 50 157 158 #define SDHCI_200_MAX_DIVIDER 256 159 #define SDHCI_300_MAX_DIVIDER 2046 160 161 #define SDHCI_CARD_PRESENT_TICKS (hz / 5) 162 #define SDHCI_INSERT_DELAY_TICKS (hz / 2) 163 164 /* 165 * Broadcom BCM577xx Controller Constants 166 */ 167 /* Maximum divider supported by the default clock source. */ 168 #define BCM577XX_DEFAULT_MAX_DIVIDER 256 169 /* Alternative clock's base frequency. */ 170 #define BCM577XX_ALT_CLOCK_BASE 63000000 171 172 #define BCM577XX_HOST_CONTROL 0x198 173 #define BCM577XX_CTRL_CLKSEL_MASK 0xFFFFCFFF 174 #define BCM577XX_CTRL_CLKSEL_SHIFT 12 175 #define BCM577XX_CTRL_CLKSEL_DEFAULT 0x0 176 #define BCM577XX_CTRL_CLKSEL_64MHZ 0x3 177 178 static void 179 sdhci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 180 { 181 182 if (error != 0) { 183 printf("getaddr: error %d\n", error); 184 return; 185 } 186 *(bus_addr_t *)arg = segs[0].ds_addr; 187 } 188 189 static int 190 slot_printf(const struct sdhci_slot *slot, const char * fmt, ...) 191 { 192 char buf[128]; 193 va_list ap; 194 int retval; 195 196 /* 197 * Make sure we print a single line all together rather than in two 198 * halves to avoid console gibberish bingo. 199 */ 200 va_start(ap, fmt); 201 retval = vsnprintf(buf, sizeof(buf), fmt, ap); 202 va_end(ap); 203 204 retval += printf("%s-slot%d: %s", 205 device_get_nameunit(slot->bus), slot->num, buf); 206 return (retval); 207 } 208 209 static int 210 slot_sprintf(const struct sdhci_slot *slot, struct sbuf *s, 211 const char * fmt, ...) 212 { 213 va_list ap; 214 int retval; 215 216 retval = sbuf_printf(s, "%s-slot%d: ", device_get_nameunit(slot->bus), slot->num); 217 218 va_start(ap, fmt); 219 retval += sbuf_vprintf(s, fmt, ap); 220 va_end(ap); 221 222 return (retval); 223 } 224 225 static void 226 sdhci_dumpregs_buf(struct sdhci_slot *slot, struct sbuf *s) 227 { 228 slot_sprintf(slot, s, "============== REGISTER DUMP ==============\n"); 229 230 slot_sprintf(slot, s, "Sys addr: 0x%08x | Version: 0x%08x\n", 231 RD4(slot, SDHCI_DMA_ADDRESS), RD2(slot, SDHCI_HOST_VERSION)); 232 slot_sprintf(slot, s, "Blk size: 0x%08x | Blk cnt: 0x%08x\n", 233 RD2(slot, SDHCI_BLOCK_SIZE), RD2(slot, SDHCI_BLOCK_COUNT)); 234 slot_sprintf(slot, s, "Argument: 0x%08x | Trn mode: 0x%08x\n", 235 RD4(slot, SDHCI_ARGUMENT), RD2(slot, SDHCI_TRANSFER_MODE)); 236 slot_sprintf(slot, s, "Present: 0x%08x | Host ctl: 0x%08x\n", 237 RD4(slot, SDHCI_PRESENT_STATE), RD1(slot, SDHCI_HOST_CONTROL)); 238 slot_sprintf(slot, s, "Power: 0x%08x | Blk gap: 0x%08x\n", 239 RD1(slot, SDHCI_POWER_CONTROL), RD1(slot, SDHCI_BLOCK_GAP_CONTROL)); 240 slot_sprintf(slot, s, "Wake-up: 0x%08x | Clock: 0x%08x\n", 241 RD1(slot, SDHCI_WAKE_UP_CONTROL), RD2(slot, SDHCI_CLOCK_CONTROL)); 242 slot_sprintf(slot, s, "Timeout: 0x%08x | Int stat: 0x%08x\n", 243 RD1(slot, SDHCI_TIMEOUT_CONTROL), RD4(slot, SDHCI_INT_STATUS)); 244 slot_sprintf(slot, s, "Int enab: 0x%08x | Sig enab: 0x%08x\n", 245 RD4(slot, SDHCI_INT_ENABLE), RD4(slot, SDHCI_SIGNAL_ENABLE)); 246 slot_sprintf(slot, s, "AC12 err: 0x%08x | Host ctl2:0x%08x\n", 247 RD2(slot, SDHCI_ACMD12_ERR), RD2(slot, SDHCI_HOST_CONTROL2)); 248 slot_sprintf(slot, s, "Caps: 0x%08x | Caps2: 0x%08x\n", 249 RD4(slot, SDHCI_CAPABILITIES), RD4(slot, SDHCI_CAPABILITIES2)); 250 slot_sprintf(slot, s, "Max curr: 0x%08x | ADMA err: 0x%08x\n", 251 RD4(slot, SDHCI_MAX_CURRENT), RD1(slot, SDHCI_ADMA_ERR)); 252 slot_sprintf(slot, s, "ADMA addr:0x%08x | Slot int: 0x%08x\n", 253 RD4(slot, SDHCI_ADMA_ADDRESS_LO), RD2(slot, SDHCI_SLOT_INT_STATUS)); 254 255 slot_sprintf(slot, s, "===========================================\n"); 256 } 257 258 static void 259 sdhci_dumpregs(struct sdhci_slot *slot) 260 { 261 struct sbuf s; 262 263 if (sbuf_new(&s, NULL, 1024, SBUF_NOWAIT | SBUF_AUTOEXTEND) == NULL) { 264 slot_printf(slot, "sdhci_dumpregs: Failed to allocate memory for sbuf\n"); 265 return; 266 } 267 268 sbuf_set_drain(&s, &sbuf_printf_drain, NULL); 269 sdhci_dumpregs_buf(slot, &s); 270 sbuf_finish(&s); 271 sbuf_delete(&s); 272 } 273 274 static int 275 sdhci_syctl_dumpregs(SYSCTL_HANDLER_ARGS) 276 { 277 struct sdhci_slot *slot = arg1; 278 struct sbuf s; 279 280 sbuf_new_for_sysctl(&s, NULL, 1024, req); 281 sbuf_putc(&s, '\n'); 282 sdhci_dumpregs_buf(slot, &s); 283 sbuf_finish(&s); 284 sbuf_delete(&s); 285 286 return (0); 287 } 288 289 static void 290 sdhci_dumpcaps_buf(struct sdhci_slot *slot, struct sbuf *s) 291 { 292 int host_caps = slot->host.caps; 293 int caps = slot->caps; 294 295 slot_sprintf(slot, s, 296 "%uMHz%s %s VDD:%s%s%s VCCQ: 3.3V%s%s DRV: B%s%s%s %s %s\n", 297 slot->max_clk / 1000000, 298 (caps & SDHCI_CAN_DO_HISPD) ? " HS" : "", 299 (host_caps & MMC_CAP_8_BIT_DATA) ? "8bits" : 300 ((host_caps & MMC_CAP_4_BIT_DATA) ? "4bits" : "1bit"), 301 (caps & SDHCI_CAN_VDD_330) ? " 3.3V" : "", 302 (caps & SDHCI_CAN_VDD_300) ? " 3.0V" : "", 303 ((caps & SDHCI_CAN_VDD_180) && 304 (slot->opt & SDHCI_SLOT_EMBEDDED)) ? " 1.8V" : "", 305 (host_caps & MMC_CAP_SIGNALING_180) ? " 1.8V" : "", 306 (host_caps & MMC_CAP_SIGNALING_120) ? " 1.2V" : "", 307 (host_caps & MMC_CAP_DRIVER_TYPE_A) ? "A" : "", 308 (host_caps & MMC_CAP_DRIVER_TYPE_C) ? "C" : "", 309 (host_caps & MMC_CAP_DRIVER_TYPE_D) ? "D" : "", 310 (slot->opt & SDHCI_HAVE_DMA) ? "DMA" : "PIO", 311 (slot->opt & SDHCI_SLOT_EMBEDDED) ? "embedded" : 312 (slot->opt & SDHCI_NON_REMOVABLE) ? "non-removable" : 313 "removable"); 314 if (host_caps & (MMC_CAP_MMC_DDR52 | MMC_CAP_MMC_HS200 | 315 MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) 316 slot_sprintf(slot, s, "eMMC:%s%s%s%s\n", 317 (host_caps & MMC_CAP_MMC_DDR52) ? " DDR52" : "", 318 (host_caps & MMC_CAP_MMC_HS200) ? " HS200" : "", 319 (host_caps & MMC_CAP_MMC_HS400) ? " HS400" : "", 320 ((host_caps & 321 (MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) == 322 (MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) ? 323 " HS400ES" : ""); 324 if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | 325 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104)) 326 slot_sprintf(slot, s, "UHS-I:%s%s%s%s%s\n", 327 (host_caps & MMC_CAP_UHS_SDR12) ? " SDR12" : "", 328 (host_caps & MMC_CAP_UHS_SDR25) ? " SDR25" : "", 329 (host_caps & MMC_CAP_UHS_SDR50) ? " SDR50" : "", 330 (host_caps & MMC_CAP_UHS_SDR104) ? " SDR104" : "", 331 (host_caps & MMC_CAP_UHS_DDR50) ? " DDR50" : ""); 332 if (slot->opt & SDHCI_TUNING_SUPPORTED) 333 slot_sprintf(slot, s, 334 "Re-tuning count %d secs, mode %d\n", 335 slot->retune_count, slot->retune_mode + 1); 336 } 337 338 static void 339 sdhci_dumpcaps(struct sdhci_slot *slot) 340 { 341 struct sbuf s; 342 343 if (sbuf_new(&s, NULL, 1024, SBUF_NOWAIT | SBUF_AUTOEXTEND) == NULL) { 344 slot_printf(slot, "sdhci_dumpcaps: Failed to allocate memory for sbuf\n"); 345 return; 346 } 347 348 sbuf_set_drain(&s, &sbuf_printf_drain, NULL); 349 sdhci_dumpcaps_buf(slot, &s); 350 sbuf_finish(&s); 351 sbuf_delete(&s); 352 } 353 354 static int 355 sdhci_syctl_dumpcaps(SYSCTL_HANDLER_ARGS) 356 { 357 struct sdhci_slot *slot = arg1; 358 struct sbuf s; 359 360 sbuf_new_for_sysctl(&s, NULL, 1024, req); 361 sbuf_putc(&s, '\n'); 362 sdhci_dumpcaps_buf(slot, &s); 363 sbuf_finish(&s); 364 sbuf_delete(&s); 365 366 return (0); 367 } 368 369 static uint32_t 370 sdhci_tuning_intmask(const struct sdhci_slot *slot) 371 { 372 uint32_t intmask; 373 374 intmask = 0; 375 if (slot->opt & SDHCI_TUNING_ENABLED) { 376 intmask |= SDHCI_INT_TUNEERR; 377 if (slot->retune_mode == SDHCI_RETUNE_MODE_2 || 378 slot->retune_mode == SDHCI_RETUNE_MODE_3) 379 intmask |= SDHCI_INT_RETUNE; 380 } 381 return (intmask); 382 } 383 384 static void 385 sdhci_init(struct sdhci_slot *slot) 386 { 387 388 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_ALL); 389 390 /* Enable interrupts. */ 391 slot->intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | 392 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | 393 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | 394 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | 395 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE | 396 SDHCI_INT_ACMD12ERR; 397 398 if (!(slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) && 399 !(slot->opt & SDHCI_NON_REMOVABLE)) { 400 slot->intmask |= SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT; 401 } 402 403 WR4(slot, SDHCI_INT_ENABLE, slot->intmask); 404 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 405 } 406 407 static void 408 sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock) 409 { 410 uint32_t clk_base; 411 uint32_t clk_sel; 412 uint32_t res; 413 uint16_t clk; 414 uint16_t div; 415 int timeout; 416 417 if (clock == slot->clock) 418 return; 419 clock = SDHCI_SET_CLOCK(slot->bus, slot, clock); 420 slot->clock = clock; 421 422 /* Turn off the clock. */ 423 clk = RD2(slot, SDHCI_CLOCK_CONTROL); 424 WR2(slot, SDHCI_CLOCK_CONTROL, clk & ~SDHCI_CLOCK_CARD_EN); 425 /* If no clock requested - leave it so. */ 426 if (clock == 0) 427 return; 428 429 /* Determine the clock base frequency */ 430 clk_base = slot->max_clk; 431 if (slot->quirks & SDHCI_QUIRK_BCM577XX_400KHZ_CLKSRC) { 432 clk_sel = RD2(slot, BCM577XX_HOST_CONTROL) & 433 BCM577XX_CTRL_CLKSEL_MASK; 434 435 /* 436 * Select clock source appropriate for the requested frequency. 437 */ 438 if ((clk_base / BCM577XX_DEFAULT_MAX_DIVIDER) > clock) { 439 clk_base = BCM577XX_ALT_CLOCK_BASE; 440 clk_sel |= (BCM577XX_CTRL_CLKSEL_64MHZ << 441 BCM577XX_CTRL_CLKSEL_SHIFT); 442 } else { 443 clk_sel |= (BCM577XX_CTRL_CLKSEL_DEFAULT << 444 BCM577XX_CTRL_CLKSEL_SHIFT); 445 } 446 447 WR2(slot, BCM577XX_HOST_CONTROL, clk_sel); 448 } 449 450 /* Recalculate timeout clock frequency based on the new sd clock. */ 451 if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) 452 slot->timeout_clk = slot->clock / 1000; 453 454 if (slot->version < SDHCI_SPEC_300) { 455 /* Looking for highest freq <= clock. */ 456 res = clk_base; 457 for (div = 1; div < SDHCI_200_MAX_DIVIDER; div <<= 1) { 458 if (res <= clock) 459 break; 460 res >>= 1; 461 } 462 /* Divider 1:1 is 0x00, 2:1 is 0x01, 256:1 is 0x80 ... */ 463 div >>= 1; 464 } else { 465 /* Version 3.0 divisors are multiples of two up to 1023 * 2 */ 466 if (clock >= clk_base) 467 div = 0; 468 else { 469 for (div = 2; div < SDHCI_300_MAX_DIVIDER; div += 2) { 470 if ((clk_base / div) <= clock) 471 break; 472 } 473 } 474 div >>= 1; 475 } 476 477 if (bootverbose || sdhci_debug) 478 slot_printf(slot, "Divider %d for freq %d (base %d)\n", 479 div, clock, clk_base); 480 481 /* Now we have got divider, set it. */ 482 clk = (div & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT; 483 clk |= ((div >> SDHCI_DIVIDER_MASK_LEN) & SDHCI_DIVIDER_HI_MASK) 484 << SDHCI_DIVIDER_HI_SHIFT; 485 486 WR2(slot, SDHCI_CLOCK_CONTROL, clk); 487 /* Enable clock. */ 488 clk |= SDHCI_CLOCK_INT_EN; 489 WR2(slot, SDHCI_CLOCK_CONTROL, clk); 490 /* Wait up to 10 ms until it stabilize. */ 491 timeout = 10; 492 while (!((clk = RD2(slot, SDHCI_CLOCK_CONTROL)) 493 & SDHCI_CLOCK_INT_STABLE)) { 494 if (timeout == 0) { 495 slot_printf(slot, 496 "Internal clock never stabilised.\n"); 497 sdhci_dumpregs(slot); 498 return; 499 } 500 timeout--; 501 DELAY(1000); 502 } 503 /* Pass clock signal to the bus. */ 504 clk |= SDHCI_CLOCK_CARD_EN; 505 WR2(slot, SDHCI_CLOCK_CONTROL, clk); 506 } 507 508 static void 509 sdhci_set_power(struct sdhci_slot *slot, u_char power) 510 { 511 int i; 512 uint8_t pwr; 513 514 if (slot->power == power) 515 return; 516 517 slot->power = power; 518 519 /* Turn off the power. */ 520 pwr = 0; 521 WR1(slot, SDHCI_POWER_CONTROL, pwr); 522 /* If power down requested - leave it so. */ 523 if (power == 0) 524 return; 525 /* Set voltage. */ 526 switch (1 << power) { 527 case MMC_OCR_LOW_VOLTAGE: 528 pwr |= SDHCI_POWER_180; 529 break; 530 case MMC_OCR_290_300: 531 case MMC_OCR_300_310: 532 pwr |= SDHCI_POWER_300; 533 break; 534 case MMC_OCR_320_330: 535 case MMC_OCR_330_340: 536 pwr |= SDHCI_POWER_330; 537 break; 538 } 539 WR1(slot, SDHCI_POWER_CONTROL, pwr); 540 /* 541 * Turn on VDD1 power. Note that at least some Intel controllers can 542 * fail to enable bus power on the first try after transiting from D3 543 * to D0, so we give them up to 2 ms. 544 */ 545 pwr |= SDHCI_POWER_ON; 546 for (i = 0; i < 20; i++) { 547 WR1(slot, SDHCI_POWER_CONTROL, pwr); 548 if (RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON) 549 break; 550 DELAY(100); 551 } 552 if (!(RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON)) 553 slot_printf(slot, "Bus power failed to enable\n"); 554 555 if (slot->quirks & SDHCI_QUIRK_INTEL_POWER_UP_RESET) { 556 WR1(slot, SDHCI_POWER_CONTROL, pwr | 0x10); 557 DELAY(10); 558 WR1(slot, SDHCI_POWER_CONTROL, pwr); 559 DELAY(300); 560 } 561 } 562 563 static void 564 sdhci_read_block_pio(struct sdhci_slot *slot) 565 { 566 uint32_t data; 567 char *buffer; 568 size_t left; 569 570 buffer = slot->curcmd->data->data; 571 buffer += slot->offset; 572 /* Transfer one block at a time. */ 573 #ifdef MMCCAM 574 if (slot->curcmd->data->flags & MMC_DATA_BLOCK_SIZE) 575 left = min(slot->curcmd->data->block_size, 576 slot->curcmd->data->len - slot->offset); 577 else 578 #endif 579 left = min(512, slot->curcmd->data->len - slot->offset); 580 slot->offset += left; 581 582 /* If we are too fast, broken controllers return zeroes. */ 583 if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS) 584 DELAY(10); 585 /* Handle unaligned and aligned buffer cases. */ 586 if ((intptr_t)buffer & 3) { 587 while (left > 3) { 588 data = RD4(slot, SDHCI_BUFFER); 589 buffer[0] = data; 590 buffer[1] = (data >> 8); 591 buffer[2] = (data >> 16); 592 buffer[3] = (data >> 24); 593 buffer += 4; 594 left -= 4; 595 } 596 } else { 597 RD_MULTI_4(slot, SDHCI_BUFFER, 598 (uint32_t *)buffer, left >> 2); 599 left &= 3; 600 } 601 /* Handle uneven size case. */ 602 if (left > 0) { 603 data = RD4(slot, SDHCI_BUFFER); 604 while (left > 0) { 605 *(buffer++) = data; 606 data >>= 8; 607 left--; 608 } 609 } 610 } 611 612 static void 613 sdhci_write_block_pio(struct sdhci_slot *slot) 614 { 615 uint32_t data = 0; 616 char *buffer; 617 size_t left; 618 619 buffer = slot->curcmd->data->data; 620 buffer += slot->offset; 621 /* Transfer one block at a time. */ 622 #ifdef MMCCAM 623 if (slot->curcmd->data->flags & MMC_DATA_BLOCK_SIZE) { 624 left = min(slot->curcmd->data->block_size, 625 slot->curcmd->data->len - slot->offset); 626 } else 627 #endif 628 left = min(512, slot->curcmd->data->len - slot->offset); 629 slot->offset += left; 630 631 /* Handle unaligned and aligned buffer cases. */ 632 if ((intptr_t)buffer & 3) { 633 while (left > 3) { 634 data = buffer[0] + 635 (buffer[1] << 8) + 636 (buffer[2] << 16) + 637 (buffer[3] << 24); 638 left -= 4; 639 buffer += 4; 640 WR4(slot, SDHCI_BUFFER, data); 641 } 642 } else { 643 WR_MULTI_4(slot, SDHCI_BUFFER, 644 (uint32_t *)buffer, left >> 2); 645 left &= 3; 646 } 647 /* Handle uneven size case. */ 648 if (left > 0) { 649 while (left > 0) { 650 data <<= 8; 651 data += *(buffer++); 652 left--; 653 } 654 WR4(slot, SDHCI_BUFFER, data); 655 } 656 } 657 658 static void 659 sdhci_transfer_pio(struct sdhci_slot *slot) 660 { 661 662 /* Read as many blocks as possible. */ 663 if (slot->curcmd->data->flags & MMC_DATA_READ) { 664 while (RD4(slot, SDHCI_PRESENT_STATE) & 665 SDHCI_DATA_AVAILABLE) { 666 sdhci_read_block_pio(slot); 667 if (slot->offset >= slot->curcmd->data->len) 668 break; 669 } 670 } else { 671 while (RD4(slot, SDHCI_PRESENT_STATE) & 672 SDHCI_SPACE_AVAILABLE) { 673 sdhci_write_block_pio(slot); 674 if (slot->offset >= slot->curcmd->data->len) 675 break; 676 } 677 } 678 } 679 680 static void 681 sdhci_card_task(void *arg, int pending __unused) 682 { 683 struct sdhci_slot *slot = arg; 684 #ifndef MMCCAM 685 device_t d; 686 #endif 687 688 SDHCI_LOCK(slot); 689 if (SDHCI_GET_CARD_PRESENT(slot->bus, slot)) { 690 #ifdef MMCCAM 691 if (slot->card_present == 0) { 692 #else 693 if (slot->dev == NULL) { 694 #endif 695 /* If card is present - attach mmc bus. */ 696 if (bootverbose || sdhci_debug) 697 slot_printf(slot, "Card inserted\n"); 698 #ifdef MMCCAM 699 slot->card_present = 1; 700 mmccam_start_discovery(slot->sim); 701 SDHCI_UNLOCK(slot); 702 #else 703 d = slot->dev = device_add_child(slot->bus, "mmc", -1); 704 SDHCI_UNLOCK(slot); 705 if (d) { 706 device_set_ivars(d, slot); 707 (void)device_probe_and_attach(d); 708 } 709 #endif 710 } else 711 SDHCI_UNLOCK(slot); 712 } else { 713 #ifdef MMCCAM 714 if (slot->card_present == 1) { 715 #else 716 if (slot->dev != NULL) { 717 d = slot->dev; 718 #endif 719 /* If no card present - detach mmc bus. */ 720 if (bootverbose || sdhci_debug) 721 slot_printf(slot, "Card removed\n"); 722 slot->dev = NULL; 723 #ifdef MMCCAM 724 slot->card_present = 0; 725 mmccam_start_discovery(slot->sim); 726 SDHCI_UNLOCK(slot); 727 #else 728 slot->intmask &= ~sdhci_tuning_intmask(slot); 729 WR4(slot, SDHCI_INT_ENABLE, slot->intmask); 730 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 731 slot->opt &= ~SDHCI_TUNING_ENABLED; 732 SDHCI_UNLOCK(slot); 733 callout_drain(&slot->retune_callout); 734 device_delete_child(slot->bus, d); 735 #endif 736 } else 737 SDHCI_UNLOCK(slot); 738 } 739 } 740 741 static void 742 sdhci_handle_card_present_locked(struct sdhci_slot *slot, bool is_present) 743 { 744 bool was_present; 745 746 /* 747 * If there was no card and now there is one, schedule the task to 748 * create the child device after a short delay. The delay is to 749 * debounce the card insert (sometimes the card detect pin stabilizes 750 * before the other pins have made good contact). 751 * 752 * If there was a card present and now it's gone, immediately schedule 753 * the task to delete the child device. No debouncing -- gone is gone, 754 * because once power is removed, a full card re-init is needed, and 755 * that happens by deleting and recreating the child device. 756 */ 757 #ifdef MMCCAM 758 was_present = slot->card_present; 759 #else 760 was_present = slot->dev != NULL; 761 #endif 762 if (!was_present && is_present) { 763 taskqueue_enqueue_timeout(taskqueue_swi_giant, 764 &slot->card_delayed_task, -SDHCI_INSERT_DELAY_TICKS); 765 } else if (was_present && !is_present) { 766 taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task); 767 } 768 } 769 770 void 771 sdhci_handle_card_present(struct sdhci_slot *slot, bool is_present) 772 { 773 774 SDHCI_LOCK(slot); 775 sdhci_handle_card_present_locked(slot, is_present); 776 SDHCI_UNLOCK(slot); 777 } 778 779 static void 780 sdhci_card_poll(void *arg) 781 { 782 struct sdhci_slot *slot = arg; 783 784 sdhci_handle_card_present(slot, 785 SDHCI_GET_CARD_PRESENT(slot->bus, slot)); 786 callout_reset(&slot->card_poll_callout, SDHCI_CARD_PRESENT_TICKS, 787 sdhci_card_poll, slot); 788 } 789 790 static int 791 sdhci_dma_alloc(struct sdhci_slot *slot) 792 { 793 int err; 794 795 if (!(slot->quirks & SDHCI_QUIRK_BROKEN_SDMA_BOUNDARY)) { 796 if (maxphys <= 1024 * 4) 797 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_4K; 798 else if (maxphys <= 1024 * 8) 799 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_8K; 800 else if (maxphys <= 1024 * 16) 801 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_16K; 802 else if (maxphys <= 1024 * 32) 803 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_32K; 804 else if (maxphys <= 1024 * 64) 805 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_64K; 806 else if (maxphys <= 1024 * 128) 807 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_128K; 808 else if (maxphys <= 1024 * 256) 809 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_256K; 810 else 811 slot->sdma_boundary = SDHCI_BLKSZ_SDMA_BNDRY_512K; 812 } 813 slot->sdma_bbufsz = SDHCI_SDMA_BNDRY_TO_BBUFSZ(slot->sdma_boundary); 814 815 /* 816 * Allocate the DMA tag for an SDMA bounce buffer. 817 * Note that the SDHCI specification doesn't state any alignment 818 * constraint for the SDMA system address. However, controllers 819 * typically ignore the SDMA boundary bits in SDHCI_DMA_ADDRESS when 820 * forming the actual address of data, requiring the SDMA buffer to 821 * be aligned to the SDMA boundary. 822 */ 823 err = bus_dma_tag_create(bus_get_dma_tag(slot->bus), slot->sdma_bbufsz, 824 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 825 slot->sdma_bbufsz, 1, slot->sdma_bbufsz, BUS_DMA_ALLOCNOW, 826 NULL, NULL, &slot->dmatag); 827 if (err != 0) { 828 slot_printf(slot, "Can't create DMA tag for SDMA\n"); 829 return (err); 830 } 831 /* Allocate DMA memory for the SDMA bounce buffer. */ 832 err = bus_dmamem_alloc(slot->dmatag, (void **)&slot->dmamem, 833 BUS_DMA_NOWAIT, &slot->dmamap); 834 if (err != 0) { 835 slot_printf(slot, "Can't alloc DMA memory for SDMA\n"); 836 bus_dma_tag_destroy(slot->dmatag); 837 return (err); 838 } 839 /* Map the memory of the SDMA bounce buffer. */ 840 err = bus_dmamap_load(slot->dmatag, slot->dmamap, 841 (void *)slot->dmamem, slot->sdma_bbufsz, sdhci_getaddr, 842 &slot->paddr, 0); 843 if (err != 0 || slot->paddr == 0) { 844 slot_printf(slot, "Can't load DMA memory for SDMA\n"); 845 bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap); 846 bus_dma_tag_destroy(slot->dmatag); 847 if (err) 848 return (err); 849 else 850 return (EFAULT); 851 } 852 853 return (0); 854 } 855 856 static void 857 sdhci_dma_free(struct sdhci_slot *slot) 858 { 859 860 bus_dmamap_unload(slot->dmatag, slot->dmamap); 861 bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap); 862 bus_dma_tag_destroy(slot->dmatag); 863 } 864 865 int 866 sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num) 867 { 868 kobjop_desc_t kobj_desc; 869 kobj_method_t *kobj_method; 870 uint32_t caps, caps2, freq, host_caps; 871 int err; 872 char node_name[8]; 873 struct sysctl_oid *node_oid; 874 875 SDHCI_LOCK_INIT(slot); 876 877 slot->num = num; 878 slot->bus = dev; 879 880 slot->version = (RD2(slot, SDHCI_HOST_VERSION) 881 >> SDHCI_SPEC_VER_SHIFT) & SDHCI_SPEC_VER_MASK; 882 if (slot->quirks & SDHCI_QUIRK_MISSING_CAPS) { 883 caps = slot->caps; 884 caps2 = slot->caps2; 885 } else { 886 caps = RD4(slot, SDHCI_CAPABILITIES); 887 if (slot->version >= SDHCI_SPEC_300) 888 caps2 = RD4(slot, SDHCI_CAPABILITIES2); 889 else 890 caps2 = 0; 891 } 892 if (slot->version >= SDHCI_SPEC_300) { 893 if ((caps & SDHCI_SLOTTYPE_MASK) != SDHCI_SLOTTYPE_REMOVABLE && 894 (caps & SDHCI_SLOTTYPE_MASK) != SDHCI_SLOTTYPE_EMBEDDED) { 895 slot_printf(slot, 896 "Driver doesn't support shared bus slots\n"); 897 SDHCI_LOCK_DESTROY(slot); 898 return (ENXIO); 899 } else if ((caps & SDHCI_SLOTTYPE_MASK) == 900 SDHCI_SLOTTYPE_EMBEDDED) { 901 slot->opt |= SDHCI_SLOT_EMBEDDED | SDHCI_NON_REMOVABLE; 902 } 903 } 904 /* Calculate base clock frequency. */ 905 if (slot->version >= SDHCI_SPEC_300) 906 freq = (caps & SDHCI_CLOCK_V3_BASE_MASK) >> 907 SDHCI_CLOCK_BASE_SHIFT; 908 else 909 freq = (caps & SDHCI_CLOCK_BASE_MASK) >> 910 SDHCI_CLOCK_BASE_SHIFT; 911 if (freq != 0) 912 slot->max_clk = freq * 1000000; 913 /* 914 * If the frequency wasn't in the capabilities and the hardware driver 915 * hasn't already set max_clk we're probably not going to work right 916 * with an assumption, so complain about it. 917 */ 918 if (slot->max_clk == 0) { 919 slot->max_clk = SDHCI_DEFAULT_MAX_FREQ * 1000000; 920 slot_printf(slot, "Hardware doesn't specify base clock " 921 "frequency, using %dMHz as default.\n", 922 SDHCI_DEFAULT_MAX_FREQ); 923 } 924 /* Calculate/set timeout clock frequency. */ 925 if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) { 926 slot->timeout_clk = slot->max_clk / 1000; 927 } else if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_1MHZ) { 928 slot->timeout_clk = 1000; 929 } else { 930 slot->timeout_clk = (caps & SDHCI_TIMEOUT_CLK_MASK) >> 931 SDHCI_TIMEOUT_CLK_SHIFT; 932 if (caps & SDHCI_TIMEOUT_CLK_UNIT) 933 slot->timeout_clk *= 1000; 934 } 935 /* 936 * If the frequency wasn't in the capabilities and the hardware driver 937 * hasn't already set timeout_clk we'll probably work okay using the 938 * max timeout, but still mention it. 939 */ 940 if (slot->timeout_clk == 0) { 941 slot_printf(slot, "Hardware doesn't specify timeout clock " 942 "frequency, setting BROKEN_TIMEOUT quirk.\n"); 943 slot->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; 944 } 945 946 slot->host.f_min = SDHCI_MIN_FREQ(slot->bus, slot); 947 slot->host.f_max = slot->max_clk; 948 slot->host.host_ocr = 0; 949 if (caps & SDHCI_CAN_VDD_330) 950 slot->host.host_ocr |= MMC_OCR_320_330 | MMC_OCR_330_340; 951 if (caps & SDHCI_CAN_VDD_300) 952 slot->host.host_ocr |= MMC_OCR_290_300 | MMC_OCR_300_310; 953 /* 954 * 1.8V VDD is not supposed to be used for removable cards. Hardware 955 * prior to v3.0 had no way to indicate embedded slots, but did 956 * sometimes support 1.8v for non-removable devices. 957 */ 958 if ((caps & SDHCI_CAN_VDD_180) && (slot->version < SDHCI_SPEC_300 || 959 (slot->opt & SDHCI_SLOT_EMBEDDED))) 960 slot->host.host_ocr |= MMC_OCR_LOW_VOLTAGE; 961 if (slot->host.host_ocr == 0) { 962 slot_printf(slot, "Hardware doesn't report any " 963 "support voltages.\n"); 964 } 965 966 host_caps = slot->host.caps; 967 host_caps |= MMC_CAP_4_BIT_DATA; 968 if (caps & SDHCI_CAN_DO_8BITBUS) 969 host_caps |= MMC_CAP_8_BIT_DATA; 970 if (caps & SDHCI_CAN_DO_HISPD) 971 host_caps |= MMC_CAP_HSPEED; 972 if (slot->quirks & SDHCI_QUIRK_BOOT_NOACC) 973 host_caps |= MMC_CAP_BOOT_NOACC; 974 if (slot->quirks & SDHCI_QUIRK_WAIT_WHILE_BUSY) 975 host_caps |= MMC_CAP_WAIT_WHILE_BUSY; 976 977 /* Determine supported UHS-I and eMMC modes. */ 978 if (caps2 & (SDHCI_CAN_SDR50 | SDHCI_CAN_SDR104 | SDHCI_CAN_DDR50)) 979 host_caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; 980 if (caps2 & SDHCI_CAN_SDR104) { 981 host_caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; 982 if (!(slot->quirks & SDHCI_QUIRK_BROKEN_MMC_HS200)) 983 host_caps |= MMC_CAP_MMC_HS200; 984 } else if (caps2 & SDHCI_CAN_SDR50) 985 host_caps |= MMC_CAP_UHS_SDR50; 986 if (caps2 & SDHCI_CAN_DDR50 && 987 !(slot->quirks & SDHCI_QUIRK_BROKEN_UHS_DDR50)) 988 host_caps |= MMC_CAP_UHS_DDR50; 989 if (slot->quirks & SDHCI_QUIRK_MMC_DDR52) 990 host_caps |= MMC_CAP_MMC_DDR52; 991 if (slot->quirks & SDHCI_QUIRK_CAPS_BIT63_FOR_MMC_HS400 && 992 caps2 & SDHCI_CAN_MMC_HS400) 993 host_caps |= MMC_CAP_MMC_HS400; 994 if (slot->quirks & SDHCI_QUIRK_MMC_HS400_IF_CAN_SDR104 && 995 caps2 & SDHCI_CAN_SDR104) 996 host_caps |= MMC_CAP_MMC_HS400; 997 998 /* 999 * Disable UHS-I and eMMC modes if the set_uhs_timing method is the 1000 * default NULL implementation. 1001 */ 1002 kobj_desc = &sdhci_set_uhs_timing_desc; 1003 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 1004 kobj_desc); 1005 if (kobj_method == &kobj_desc->deflt) 1006 host_caps &= ~(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | 1007 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 | 1008 MMC_CAP_MMC_DDR52 | MMC_CAP_MMC_HS200 | MMC_CAP_MMC_HS400); 1009 1010 #define SDHCI_CAP_MODES_TUNING(caps2) \ 1011 (((caps2) & SDHCI_TUNE_SDR50 ? MMC_CAP_UHS_SDR50 : 0) | \ 1012 MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_MMC_HS200 | \ 1013 MMC_CAP_MMC_HS400) 1014 1015 /* 1016 * Disable UHS-I and eMMC modes that require (re-)tuning if either 1017 * the tune or re-tune method is the default NULL implementation. 1018 */ 1019 kobj_desc = &mmcbr_tune_desc; 1020 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 1021 kobj_desc); 1022 if (kobj_method == &kobj_desc->deflt) 1023 goto no_tuning; 1024 kobj_desc = &mmcbr_retune_desc; 1025 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 1026 kobj_desc); 1027 if (kobj_method == &kobj_desc->deflt) { 1028 no_tuning: 1029 host_caps &= ~(SDHCI_CAP_MODES_TUNING(caps2)); 1030 } 1031 1032 /* Allocate tuning structures and determine tuning parameters. */ 1033 if (host_caps & SDHCI_CAP_MODES_TUNING(caps2)) { 1034 slot->opt |= SDHCI_TUNING_SUPPORTED; 1035 slot->tune_req = malloc(sizeof(*slot->tune_req), M_DEVBUF, 1036 M_WAITOK); 1037 slot->tune_cmd = malloc(sizeof(*slot->tune_cmd), M_DEVBUF, 1038 M_WAITOK); 1039 slot->tune_data = malloc(sizeof(*slot->tune_data), M_DEVBUF, 1040 M_WAITOK); 1041 if (caps2 & SDHCI_TUNE_SDR50) 1042 slot->opt |= SDHCI_SDR50_NEEDS_TUNING; 1043 slot->retune_mode = (caps2 & SDHCI_RETUNE_MODES_MASK) >> 1044 SDHCI_RETUNE_MODES_SHIFT; 1045 if (slot->retune_mode == SDHCI_RETUNE_MODE_1) { 1046 slot->retune_count = (caps2 & SDHCI_RETUNE_CNT_MASK) >> 1047 SDHCI_RETUNE_CNT_SHIFT; 1048 if (slot->retune_count > 0xb) { 1049 slot_printf(slot, "Unknown re-tuning count " 1050 "%x, using 1 sec\n", slot->retune_count); 1051 slot->retune_count = 1; 1052 } else if (slot->retune_count != 0) 1053 slot->retune_count = 1054 1 << (slot->retune_count - 1); 1055 } 1056 } 1057 1058 #undef SDHCI_CAP_MODES_TUNING 1059 1060 /* Determine supported VCCQ signaling levels. */ 1061 host_caps |= MMC_CAP_SIGNALING_330; 1062 if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | 1063 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 | 1064 MMC_CAP_MMC_DDR52_180 | MMC_CAP_MMC_HS200_180 | 1065 MMC_CAP_MMC_HS400_180)) 1066 host_caps |= MMC_CAP_SIGNALING_120 | MMC_CAP_SIGNALING_180; 1067 1068 /* 1069 * Disable 1.2 V and 1.8 V signaling if the switch_vccq method is the 1070 * default NULL implementation. Disable 1.2 V support if it's the 1071 * generic SDHCI implementation. 1072 */ 1073 kobj_desc = &mmcbr_switch_vccq_desc; 1074 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 1075 kobj_desc); 1076 if (kobj_method == &kobj_desc->deflt) 1077 host_caps &= ~(MMC_CAP_SIGNALING_120 | MMC_CAP_SIGNALING_180); 1078 else if (kobj_method->func == (kobjop_t)sdhci_generic_switch_vccq) 1079 host_caps &= ~MMC_CAP_SIGNALING_120; 1080 1081 /* Determine supported driver types (type B is always mandatory). */ 1082 if (caps2 & SDHCI_CAN_DRIVE_TYPE_A) 1083 host_caps |= MMC_CAP_DRIVER_TYPE_A; 1084 if (caps2 & SDHCI_CAN_DRIVE_TYPE_C) 1085 host_caps |= MMC_CAP_DRIVER_TYPE_C; 1086 if (caps2 & SDHCI_CAN_DRIVE_TYPE_D) 1087 host_caps |= MMC_CAP_DRIVER_TYPE_D; 1088 slot->host.caps = host_caps; 1089 1090 /* Decide if we have usable DMA. */ 1091 if (caps & SDHCI_CAN_DO_DMA) 1092 slot->opt |= SDHCI_HAVE_DMA; 1093 1094 if (slot->quirks & SDHCI_QUIRK_BROKEN_DMA) 1095 slot->opt &= ~SDHCI_HAVE_DMA; 1096 if (slot->quirks & SDHCI_QUIRK_FORCE_DMA) 1097 slot->opt |= SDHCI_HAVE_DMA; 1098 if (slot->quirks & SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE) 1099 slot->opt |= SDHCI_NON_REMOVABLE; 1100 1101 /* 1102 * Use platform-provided transfer backend 1103 * with PIO as a fallback mechanism 1104 */ 1105 if (slot->opt & SDHCI_PLATFORM_TRANSFER) 1106 slot->opt &= ~SDHCI_HAVE_DMA; 1107 1108 if (slot->opt & SDHCI_HAVE_DMA) { 1109 err = sdhci_dma_alloc(slot); 1110 if (err != 0) { 1111 if (slot->opt & SDHCI_TUNING_SUPPORTED) { 1112 free(slot->tune_req, M_DEVBUF); 1113 free(slot->tune_cmd, M_DEVBUF); 1114 free(slot->tune_data, M_DEVBUF); 1115 } 1116 SDHCI_LOCK_DESTROY(slot); 1117 return (err); 1118 } 1119 } 1120 1121 if (bootverbose || sdhci_debug) { 1122 sdhci_dumpcaps(slot); 1123 sdhci_dumpregs(slot); 1124 } 1125 1126 slot->timeout = 10; 1127 SYSCTL_ADD_INT(device_get_sysctl_ctx(slot->bus), 1128 SYSCTL_CHILDREN(device_get_sysctl_tree(slot->bus)), OID_AUTO, 1129 "timeout", CTLFLAG_RWTUN, &slot->timeout, 0, 1130 "Maximum timeout for SDHCI transfers (in secs)"); 1131 TASK_INIT(&slot->card_task, 0, sdhci_card_task, slot); 1132 TIMEOUT_TASK_INIT(taskqueue_swi_giant, &slot->card_delayed_task, 0, 1133 sdhci_card_task, slot); 1134 callout_init(&slot->card_poll_callout, 1); 1135 callout_init_mtx(&slot->timeout_callout, &slot->mtx, 0); 1136 callout_init_mtx(&slot->retune_callout, &slot->mtx, 0); 1137 1138 if ((slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) && 1139 !(slot->opt & SDHCI_NON_REMOVABLE)) { 1140 callout_reset(&slot->card_poll_callout, 1141 SDHCI_CARD_PRESENT_TICKS, sdhci_card_poll, slot); 1142 } 1143 1144 sdhci_init(slot); 1145 1146 snprintf(node_name, sizeof(node_name), "slot%d", slot->num); 1147 1148 node_oid = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev), 1149 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 1150 OID_AUTO, node_name, CTLFLAG_RW, 0, "slot specific node"); 1151 1152 node_oid = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev), 1153 SYSCTL_CHILDREN(node_oid), OID_AUTO, "debug", CTLFLAG_RW, 0, 1154 "Debugging node"); 1155 1156 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(node_oid), 1157 OID_AUTO, "dumpregs", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, 1158 slot, 0, &sdhci_syctl_dumpregs, 1159 "A", "Dump SDHCI registers"); 1160 1161 SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(node_oid), 1162 OID_AUTO, "dumpcaps", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, 1163 slot, 0, &sdhci_syctl_dumpcaps, 1164 "A", "Dump SDHCI capabilites"); 1165 1166 return (0); 1167 } 1168 1169 #ifndef MMCCAM 1170 void 1171 sdhci_start_slot(struct sdhci_slot *slot) 1172 { 1173 1174 sdhci_card_task(slot, 0); 1175 } 1176 #endif 1177 1178 int 1179 sdhci_cleanup_slot(struct sdhci_slot *slot) 1180 { 1181 device_t d; 1182 1183 callout_drain(&slot->timeout_callout); 1184 callout_drain(&slot->card_poll_callout); 1185 callout_drain(&slot->retune_callout); 1186 taskqueue_drain(taskqueue_swi_giant, &slot->card_task); 1187 taskqueue_drain_timeout(taskqueue_swi_giant, &slot->card_delayed_task); 1188 1189 SDHCI_LOCK(slot); 1190 d = slot->dev; 1191 slot->dev = NULL; 1192 SDHCI_UNLOCK(slot); 1193 if (d != NULL) 1194 device_delete_child(slot->bus, d); 1195 1196 SDHCI_LOCK(slot); 1197 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_ALL); 1198 SDHCI_UNLOCK(slot); 1199 if (slot->opt & SDHCI_HAVE_DMA) 1200 sdhci_dma_free(slot); 1201 if (slot->opt & SDHCI_TUNING_SUPPORTED) { 1202 free(slot->tune_req, M_DEVBUF); 1203 free(slot->tune_cmd, M_DEVBUF); 1204 free(slot->tune_data, M_DEVBUF); 1205 } 1206 1207 SDHCI_LOCK_DESTROY(slot); 1208 1209 return (0); 1210 } 1211 1212 int 1213 sdhci_generic_suspend(struct sdhci_slot *slot) 1214 { 1215 1216 /* 1217 * We expect the MMC layer to issue initial tuning after resume. 1218 * Otherwise, we'd need to indicate re-tuning including circuit reset 1219 * being required at least for re-tuning modes 1 and 2 ourselves. 1220 */ 1221 callout_drain(&slot->retune_callout); 1222 SDHCI_LOCK(slot); 1223 slot->opt &= ~SDHCI_TUNING_ENABLED; 1224 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_ALL); 1225 SDHCI_UNLOCK(slot); 1226 1227 return (0); 1228 } 1229 1230 int 1231 sdhci_generic_resume(struct sdhci_slot *slot) 1232 { 1233 1234 SDHCI_LOCK(slot); 1235 sdhci_init(slot); 1236 SDHCI_UNLOCK(slot); 1237 1238 return (0); 1239 } 1240 1241 void 1242 sdhci_generic_reset(device_t brdev __unused, struct sdhci_slot *slot, 1243 uint8_t mask) 1244 { 1245 int timeout; 1246 uint32_t clock; 1247 1248 if (slot->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { 1249 if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot)) 1250 return; 1251 } 1252 1253 /* Some controllers need this kick or reset won't work. */ 1254 if ((mask & SDHCI_RESET_ALL) == 0 && 1255 (slot->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)) { 1256 /* This is to force an update */ 1257 clock = slot->clock; 1258 slot->clock = 0; 1259 sdhci_set_clock(slot, clock); 1260 } 1261 1262 if (mask & SDHCI_RESET_ALL) { 1263 slot->clock = 0; 1264 slot->power = 0; 1265 } 1266 1267 WR1(slot, SDHCI_SOFTWARE_RESET, mask); 1268 1269 if (slot->quirks & SDHCI_QUIRK_WAITFOR_RESET_ASSERTED) { 1270 /* 1271 * Resets on TI OMAPs and AM335x are incompatible with SDHCI 1272 * specification. The reset bit has internal propagation delay, 1273 * so a fast read after write returns 0 even if reset process is 1274 * in progress. The workaround is to poll for 1 before polling 1275 * for 0. In the worst case, if we miss seeing it asserted the 1276 * time we spent waiting is enough to ensure the reset finishes. 1277 */ 1278 timeout = 10000; 1279 while ((RD1(slot, SDHCI_SOFTWARE_RESET) & mask) != mask) { 1280 if (timeout <= 0) 1281 break; 1282 timeout--; 1283 DELAY(1); 1284 } 1285 } 1286 1287 /* Wait max 100 ms */ 1288 timeout = 10000; 1289 /* Controller clears the bits when it's done */ 1290 while (RD1(slot, SDHCI_SOFTWARE_RESET) & mask) { 1291 if (timeout <= 0) { 1292 slot_printf(slot, "Reset 0x%x never completed.\n", 1293 mask); 1294 sdhci_dumpregs(slot); 1295 return; 1296 } 1297 timeout--; 1298 DELAY(10); 1299 } 1300 } 1301 1302 uint32_t 1303 sdhci_generic_min_freq(device_t brdev __unused, struct sdhci_slot *slot) 1304 { 1305 1306 if (slot->version >= SDHCI_SPEC_300) 1307 return (slot->max_clk / SDHCI_300_MAX_DIVIDER); 1308 else 1309 return (slot->max_clk / SDHCI_200_MAX_DIVIDER); 1310 } 1311 1312 bool 1313 sdhci_generic_get_card_present(device_t brdev __unused, struct sdhci_slot *slot) 1314 { 1315 1316 if (slot->opt & SDHCI_NON_REMOVABLE) 1317 return true; 1318 1319 return (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); 1320 } 1321 1322 void 1323 sdhci_generic_set_uhs_timing(device_t brdev __unused, struct sdhci_slot *slot) 1324 { 1325 const struct mmc_ios *ios; 1326 uint16_t hostctrl2; 1327 1328 if (slot->version < SDHCI_SPEC_300) 1329 return; 1330 1331 SDHCI_ASSERT_LOCKED(slot); 1332 ios = &slot->host.ios; 1333 sdhci_set_clock(slot, 0); 1334 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1335 hostctrl2 &= ~SDHCI_CTRL2_UHS_MASK; 1336 if (ios->clock > SD_SDR50_MAX) { 1337 if (ios->timing == bus_timing_mmc_hs400 || 1338 ios->timing == bus_timing_mmc_hs400es) 1339 hostctrl2 |= SDHCI_CTRL2_MMC_HS400; 1340 else 1341 hostctrl2 |= SDHCI_CTRL2_UHS_SDR104; 1342 } 1343 else if (ios->clock > SD_SDR25_MAX) 1344 hostctrl2 |= SDHCI_CTRL2_UHS_SDR50; 1345 else if (ios->clock > SD_SDR12_MAX) { 1346 if (ios->timing == bus_timing_uhs_ddr50 || 1347 ios->timing == bus_timing_mmc_ddr52) 1348 hostctrl2 |= SDHCI_CTRL2_UHS_DDR50; 1349 else 1350 hostctrl2 |= SDHCI_CTRL2_UHS_SDR25; 1351 } else if (ios->clock > SD_MMC_CARD_ID_FREQUENCY) 1352 hostctrl2 |= SDHCI_CTRL2_UHS_SDR12; 1353 WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2); 1354 sdhci_set_clock(slot, ios->clock); 1355 } 1356 1357 int 1358 sdhci_generic_update_ios(device_t brdev, device_t reqdev) 1359 { 1360 struct sdhci_slot *slot = device_get_ivars(reqdev); 1361 struct mmc_ios *ios = &slot->host.ios; 1362 1363 SDHCI_LOCK(slot); 1364 /* Do full reset on bus power down to clear from any state. */ 1365 if (ios->power_mode == power_off) { 1366 WR4(slot, SDHCI_SIGNAL_ENABLE, 0); 1367 sdhci_init(slot); 1368 } 1369 /* Configure the bus. */ 1370 sdhci_set_clock(slot, ios->clock); 1371 sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd); 1372 if (ios->bus_width == bus_width_8) { 1373 slot->hostctrl |= SDHCI_CTRL_8BITBUS; 1374 slot->hostctrl &= ~SDHCI_CTRL_4BITBUS; 1375 } else if (ios->bus_width == bus_width_4) { 1376 slot->hostctrl &= ~SDHCI_CTRL_8BITBUS; 1377 slot->hostctrl |= SDHCI_CTRL_4BITBUS; 1378 } else if (ios->bus_width == bus_width_1) { 1379 slot->hostctrl &= ~SDHCI_CTRL_8BITBUS; 1380 slot->hostctrl &= ~SDHCI_CTRL_4BITBUS; 1381 } else { 1382 panic("Invalid bus width: %d", ios->bus_width); 1383 } 1384 if (ios->clock > SD_SDR12_MAX && 1385 !(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT)) 1386 slot->hostctrl |= SDHCI_CTRL_HISPD; 1387 else 1388 slot->hostctrl &= ~SDHCI_CTRL_HISPD; 1389 WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl); 1390 SDHCI_SET_UHS_TIMING(brdev, slot); 1391 /* Some controllers like reset after bus changes. */ 1392 if (slot->quirks & SDHCI_QUIRK_RESET_ON_IOS) 1393 SDHCI_RESET(slot->bus, slot, 1394 SDHCI_RESET_CMD | SDHCI_RESET_DATA); 1395 1396 SDHCI_UNLOCK(slot); 1397 return (0); 1398 } 1399 1400 int 1401 sdhci_generic_switch_vccq(device_t brdev __unused, device_t reqdev) 1402 { 1403 struct sdhci_slot *slot = device_get_ivars(reqdev); 1404 enum mmc_vccq vccq; 1405 int err; 1406 uint16_t hostctrl2; 1407 1408 if (slot->version < SDHCI_SPEC_300) 1409 return (0); 1410 1411 err = 0; 1412 vccq = slot->host.ios.vccq; 1413 SDHCI_LOCK(slot); 1414 sdhci_set_clock(slot, 0); 1415 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1416 switch (vccq) { 1417 case vccq_330: 1418 if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE)) 1419 goto done; 1420 hostctrl2 &= ~SDHCI_CTRL2_S18_ENABLE; 1421 WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2); 1422 DELAY(5000); 1423 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1424 if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE)) 1425 goto done; 1426 err = EAGAIN; 1427 break; 1428 case vccq_180: 1429 if (!(slot->host.caps & MMC_CAP_SIGNALING_180)) { 1430 err = EINVAL; 1431 goto done; 1432 } 1433 if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE) 1434 goto done; 1435 hostctrl2 |= SDHCI_CTRL2_S18_ENABLE; 1436 WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2); 1437 DELAY(5000); 1438 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1439 if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE) 1440 goto done; 1441 err = EAGAIN; 1442 break; 1443 default: 1444 slot_printf(slot, 1445 "Attempt to set unsupported signaling voltage\n"); 1446 err = EINVAL; 1447 break; 1448 } 1449 done: 1450 sdhci_set_clock(slot, slot->host.ios.clock); 1451 SDHCI_UNLOCK(slot); 1452 return (err); 1453 } 1454 1455 int 1456 sdhci_generic_tune(device_t brdev __unused, device_t reqdev, bool hs400) 1457 { 1458 struct sdhci_slot *slot = device_get_ivars(reqdev); 1459 const struct mmc_ios *ios = &slot->host.ios; 1460 struct mmc_command *tune_cmd; 1461 struct mmc_data *tune_data; 1462 uint32_t opcode; 1463 int err; 1464 1465 if (!(slot->opt & SDHCI_TUNING_SUPPORTED)) 1466 return (0); 1467 1468 slot->retune_ticks = slot->retune_count * hz; 1469 opcode = MMC_SEND_TUNING_BLOCK; 1470 SDHCI_LOCK(slot); 1471 switch (ios->timing) { 1472 case bus_timing_mmc_hs400: 1473 slot_printf(slot, "HS400 must be tuned in HS200 mode\n"); 1474 SDHCI_UNLOCK(slot); 1475 return (EINVAL); 1476 case bus_timing_mmc_hs200: 1477 /* 1478 * In HS400 mode, controllers use the data strobe line to 1479 * latch data from the devices so periodic re-tuning isn't 1480 * expected to be required. 1481 */ 1482 if (hs400) 1483 slot->retune_ticks = 0; 1484 opcode = MMC_SEND_TUNING_BLOCK_HS200; 1485 break; 1486 case bus_timing_uhs_ddr50: 1487 case bus_timing_uhs_sdr104: 1488 break; 1489 case bus_timing_uhs_sdr50: 1490 if (slot->opt & SDHCI_SDR50_NEEDS_TUNING) 1491 break; 1492 SDHCI_UNLOCK(slot); 1493 return (0); 1494 default: 1495 slot_printf(slot, "Tuning requested but not required.\n"); 1496 SDHCI_UNLOCK(slot); 1497 return (EINVAL); 1498 } 1499 1500 tune_cmd = slot->tune_cmd; 1501 memset(tune_cmd, 0, sizeof(*tune_cmd)); 1502 tune_cmd->opcode = opcode; 1503 tune_cmd->flags = MMC_RSP_R1 | MMC_CMD_ADTC; 1504 tune_data = tune_cmd->data = slot->tune_data; 1505 memset(tune_data, 0, sizeof(*tune_data)); 1506 tune_data->len = (opcode == MMC_SEND_TUNING_BLOCK_HS200 && 1507 ios->bus_width == bus_width_8) ? MMC_TUNING_LEN_HS200 : 1508 MMC_TUNING_LEN; 1509 tune_data->flags = MMC_DATA_READ; 1510 tune_data->mrq = tune_cmd->mrq = slot->tune_req; 1511 1512 slot->opt &= ~SDHCI_TUNING_ENABLED; 1513 err = sdhci_exec_tuning(slot, true); 1514 if (err == 0) { 1515 slot->opt |= SDHCI_TUNING_ENABLED; 1516 slot->intmask |= sdhci_tuning_intmask(slot); 1517 WR4(slot, SDHCI_INT_ENABLE, slot->intmask); 1518 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 1519 if (slot->retune_ticks) { 1520 callout_reset(&slot->retune_callout, slot->retune_ticks, 1521 sdhci_retune, slot); 1522 } 1523 } 1524 SDHCI_UNLOCK(slot); 1525 return (err); 1526 } 1527 1528 int 1529 sdhci_generic_retune(device_t brdev __unused, device_t reqdev, bool reset) 1530 { 1531 struct sdhci_slot *slot = device_get_ivars(reqdev); 1532 int err; 1533 1534 if (!(slot->opt & SDHCI_TUNING_ENABLED)) 1535 return (0); 1536 1537 /* HS400 must be tuned in HS200 mode. */ 1538 if (slot->host.ios.timing == bus_timing_mmc_hs400) 1539 return (EINVAL); 1540 1541 SDHCI_LOCK(slot); 1542 err = sdhci_exec_tuning(slot, reset); 1543 /* 1544 * There are two ways sdhci_exec_tuning() can fail: 1545 * EBUSY should not actually happen when requests are only issued 1546 * with the host properly acquired, and 1547 * EIO re-tuning failed (but it did work initially). 1548 * 1549 * In both cases, we should retry at later point if periodic re-tuning 1550 * is enabled. Note that due to slot->retune_req not being cleared in 1551 * these failure cases, the MMC layer should trigger another attempt at 1552 * re-tuning with the next request anyway, though. 1553 */ 1554 if (slot->retune_ticks) { 1555 callout_reset(&slot->retune_callout, slot->retune_ticks, 1556 sdhci_retune, slot); 1557 } 1558 SDHCI_UNLOCK(slot); 1559 return (err); 1560 } 1561 1562 static int 1563 sdhci_exec_tuning(struct sdhci_slot *slot, bool reset) 1564 { 1565 struct mmc_request *tune_req; 1566 struct mmc_command *tune_cmd; 1567 int i; 1568 uint32_t intmask; 1569 uint16_t hostctrl2; 1570 u_char opt; 1571 1572 SDHCI_ASSERT_LOCKED(slot); 1573 if (slot->req != NULL) 1574 return (EBUSY); 1575 1576 /* Tuning doesn't work with DMA enabled. */ 1577 opt = slot->opt; 1578 slot->opt = opt & ~SDHCI_HAVE_DMA; 1579 1580 /* 1581 * Ensure that as documented, SDHCI_INT_DATA_AVAIL is the only 1582 * kind of interrupt we receive in response to a tuning request. 1583 */ 1584 intmask = slot->intmask; 1585 slot->intmask = SDHCI_INT_DATA_AVAIL; 1586 WR4(slot, SDHCI_INT_ENABLE, SDHCI_INT_DATA_AVAIL); 1587 WR4(slot, SDHCI_SIGNAL_ENABLE, SDHCI_INT_DATA_AVAIL); 1588 1589 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1590 if (reset) 1591 hostctrl2 &= ~SDHCI_CTRL2_SAMPLING_CLOCK; 1592 else 1593 hostctrl2 |= SDHCI_CTRL2_SAMPLING_CLOCK; 1594 WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2 | SDHCI_CTRL2_EXEC_TUNING); 1595 1596 tune_req = slot->tune_req; 1597 tune_cmd = slot->tune_cmd; 1598 for (i = 0; i < MMC_TUNING_MAX; i++) { 1599 memset(tune_req, 0, sizeof(*tune_req)); 1600 tune_req->cmd = tune_cmd; 1601 tune_req->done = sdhci_req_wakeup; 1602 tune_req->done_data = slot; 1603 slot->req = tune_req; 1604 slot->flags = 0; 1605 sdhci_start(slot); 1606 while (!(tune_req->flags & MMC_REQ_DONE)) 1607 msleep(tune_req, &slot->mtx, 0, "sdhciet", 0); 1608 if (!(tune_req->flags & MMC_TUNE_DONE)) 1609 break; 1610 hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2); 1611 if (!(hostctrl2 & SDHCI_CTRL2_EXEC_TUNING)) 1612 break; 1613 if (tune_cmd->opcode == MMC_SEND_TUNING_BLOCK) 1614 DELAY(1000); 1615 } 1616 1617 /* 1618 * Restore DMA usage and interrupts. 1619 * Note that the interrupt aggregation code might have cleared 1620 * SDHCI_INT_DMA_END and/or SDHCI_INT_RESPONSE in slot->intmask 1621 * and SDHCI_SIGNAL_ENABLE respectively so ensure SDHCI_INT_ENABLE 1622 * doesn't lose these. 1623 */ 1624 slot->opt = opt; 1625 slot->intmask = intmask; 1626 WR4(slot, SDHCI_INT_ENABLE, intmask | SDHCI_INT_DMA_END | 1627 SDHCI_INT_RESPONSE); 1628 WR4(slot, SDHCI_SIGNAL_ENABLE, intmask); 1629 1630 if ((hostctrl2 & (SDHCI_CTRL2_EXEC_TUNING | 1631 SDHCI_CTRL2_SAMPLING_CLOCK)) == SDHCI_CTRL2_SAMPLING_CLOCK) { 1632 slot->retune_req = 0; 1633 return (0); 1634 } 1635 1636 slot_printf(slot, "Tuning failed, using fixed sampling clock\n"); 1637 WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2 & ~(SDHCI_CTRL2_EXEC_TUNING | 1638 SDHCI_CTRL2_SAMPLING_CLOCK)); 1639 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA); 1640 return (EIO); 1641 } 1642 1643 static void 1644 sdhci_retune(void *arg) 1645 { 1646 struct sdhci_slot *slot = arg; 1647 1648 slot->retune_req |= SDHCI_RETUNE_REQ_NEEDED; 1649 } 1650 1651 #ifdef MMCCAM 1652 static void 1653 sdhci_req_done(struct sdhci_slot *slot) 1654 { 1655 union ccb *ccb; 1656 1657 if (__predict_false(sdhci_debug > 1)) 1658 slot_printf(slot, "%s\n", __func__); 1659 if (slot->ccb != NULL && slot->curcmd != NULL) { 1660 callout_stop(&slot->timeout_callout); 1661 ccb = slot->ccb; 1662 slot->ccb = NULL; 1663 slot->curcmd = NULL; 1664 1665 /* Tell CAM the request is finished */ 1666 struct ccb_mmcio *mmcio; 1667 mmcio = &ccb->mmcio; 1668 1669 ccb->ccb_h.status = 1670 (mmcio->cmd.error == 0 ? CAM_REQ_CMP : CAM_REQ_CMP_ERR); 1671 xpt_done(ccb); 1672 } 1673 } 1674 #else 1675 static void 1676 sdhci_req_done(struct sdhci_slot *slot) 1677 { 1678 struct mmc_request *req; 1679 1680 if (slot->req != NULL && slot->curcmd != NULL) { 1681 callout_stop(&slot->timeout_callout); 1682 req = slot->req; 1683 slot->req = NULL; 1684 slot->curcmd = NULL; 1685 req->done(req); 1686 } 1687 } 1688 #endif 1689 1690 static void 1691 sdhci_req_wakeup(struct mmc_request *req) 1692 { 1693 1694 req->flags |= MMC_REQ_DONE; 1695 wakeup(req); 1696 } 1697 1698 static void 1699 sdhci_timeout(void *arg) 1700 { 1701 struct sdhci_slot *slot = arg; 1702 1703 if (slot->curcmd != NULL) { 1704 slot_printf(slot, "Controller timeout\n"); 1705 sdhci_dumpregs(slot); 1706 SDHCI_RESET(slot->bus, slot, 1707 SDHCI_RESET_CMD | SDHCI_RESET_DATA); 1708 slot->curcmd->error = MMC_ERR_TIMEOUT; 1709 sdhci_req_done(slot); 1710 } else { 1711 slot_printf(slot, "Spurious timeout - no active command\n"); 1712 } 1713 } 1714 1715 static void 1716 sdhci_set_transfer_mode(struct sdhci_slot *slot, const struct mmc_data *data) 1717 { 1718 uint16_t mode; 1719 1720 if (data == NULL) 1721 return; 1722 1723 mode = SDHCI_TRNS_BLK_CNT_EN; 1724 if (data->len > 512 || data->block_count > 1) { 1725 mode |= SDHCI_TRNS_MULTI; 1726 if (data->block_count == 0 && __predict_true( 1727 #ifdef MMCCAM 1728 slot->ccb->mmcio.stop.opcode == MMC_STOP_TRANSMISSION && 1729 #else 1730 slot->req->stop != NULL && 1731 #endif 1732 !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))) 1733 mode |= SDHCI_TRNS_ACMD12; 1734 } 1735 if (data->flags & MMC_DATA_READ) 1736 mode |= SDHCI_TRNS_READ; 1737 if (slot->flags & SDHCI_USE_DMA) 1738 mode |= SDHCI_TRNS_DMA; 1739 1740 WR2(slot, SDHCI_TRANSFER_MODE, mode); 1741 } 1742 1743 static void 1744 sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd) 1745 { 1746 int flags, timeout; 1747 uint32_t mask; 1748 1749 slot->curcmd = cmd; 1750 slot->cmd_done = 0; 1751 1752 cmd->error = MMC_ERR_NONE; 1753 1754 /* This flags combination is not supported by controller. */ 1755 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { 1756 slot_printf(slot, "Unsupported response type!\n"); 1757 cmd->error = MMC_ERR_FAILED; 1758 sdhci_req_done(slot); 1759 return; 1760 } 1761 1762 /* 1763 * Do not issue command if there is no card, clock or power. 1764 * Controller will not detect timeout without clock active. 1765 */ 1766 if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot) || 1767 slot->power == 0 || 1768 slot->clock == 0) { 1769 slot_printf(slot, 1770 "Cannot issue a command (power=%d clock=%d)\n", 1771 slot->power, slot->clock); 1772 cmd->error = MMC_ERR_FAILED; 1773 sdhci_req_done(slot); 1774 return; 1775 } 1776 /* Always wait for free CMD bus. */ 1777 mask = SDHCI_CMD_INHIBIT; 1778 /* Wait for free DAT if we have data or busy signal. */ 1779 if (cmd->data != NULL || (cmd->flags & MMC_RSP_BUSY)) 1780 mask |= SDHCI_DAT_INHIBIT; 1781 /* 1782 * We shouldn't wait for DAT for stop commands or CMD19/CMD21. Note 1783 * that these latter are also special in that SDHCI_CMD_DATA should 1784 * be set below but no actual data is ever read from the controller. 1785 */ 1786 #ifdef MMCCAM 1787 if (cmd == &slot->ccb->mmcio.stop || 1788 #else 1789 if (cmd == slot->req->stop || 1790 #endif 1791 __predict_false(cmd->opcode == MMC_SEND_TUNING_BLOCK || 1792 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)) 1793 mask &= ~SDHCI_DAT_INHIBIT; 1794 /* 1795 * Wait for bus no more then 250 ms. Typically there will be no wait 1796 * here at all, but when writing a crash dump we may be bypassing the 1797 * host platform's interrupt handler, and in some cases that handler 1798 * may be working around hardware quirks such as not respecting r1b 1799 * busy indications. In those cases, this wait-loop serves the purpose 1800 * of waiting for the prior command and data transfers to be done, and 1801 * SD cards are allowed to take up to 250ms for write and erase ops. 1802 * (It's usually more like 20-30ms in the real world.) 1803 */ 1804 timeout = 250; 1805 while (mask & RD4(slot, SDHCI_PRESENT_STATE)) { 1806 if (timeout == 0) { 1807 slot_printf(slot, "Controller never released " 1808 "inhibit bit(s).\n"); 1809 sdhci_dumpregs(slot); 1810 cmd->error = MMC_ERR_FAILED; 1811 sdhci_req_done(slot); 1812 return; 1813 } 1814 timeout--; 1815 DELAY(1000); 1816 } 1817 1818 /* Prepare command flags. */ 1819 if (!(cmd->flags & MMC_RSP_PRESENT)) 1820 flags = SDHCI_CMD_RESP_NONE; 1821 else if (cmd->flags & MMC_RSP_136) 1822 flags = SDHCI_CMD_RESP_LONG; 1823 else if (cmd->flags & MMC_RSP_BUSY) 1824 flags = SDHCI_CMD_RESP_SHORT_BUSY; 1825 else 1826 flags = SDHCI_CMD_RESP_SHORT; 1827 if (cmd->flags & MMC_RSP_CRC) 1828 flags |= SDHCI_CMD_CRC; 1829 if (cmd->flags & MMC_RSP_OPCODE) 1830 flags |= SDHCI_CMD_INDEX; 1831 if (cmd->data != NULL) 1832 flags |= SDHCI_CMD_DATA; 1833 if (cmd->opcode == MMC_STOP_TRANSMISSION) 1834 flags |= SDHCI_CMD_TYPE_ABORT; 1835 /* Prepare data. */ 1836 sdhci_start_data(slot, cmd->data); 1837 /* 1838 * Interrupt aggregation: To reduce total number of interrupts 1839 * group response interrupt with data interrupt when possible. 1840 * If there going to be data interrupt, mask response one. 1841 */ 1842 if (slot->data_done == 0) { 1843 WR4(slot, SDHCI_SIGNAL_ENABLE, 1844 slot->intmask &= ~SDHCI_INT_RESPONSE); 1845 } 1846 /* Set command argument. */ 1847 WR4(slot, SDHCI_ARGUMENT, cmd->arg); 1848 /* Set data transfer mode. */ 1849 sdhci_set_transfer_mode(slot, cmd->data); 1850 if (__predict_false(sdhci_debug > 1)) 1851 slot_printf(slot, "Starting command opcode %#04x flags %#04x\n", 1852 cmd->opcode, flags); 1853 1854 /* Start command. */ 1855 WR2(slot, SDHCI_COMMAND_FLAGS, (cmd->opcode << 8) | (flags & 0xff)); 1856 /* Start timeout callout. */ 1857 callout_reset(&slot->timeout_callout, slot->timeout * hz, 1858 sdhci_timeout, slot); 1859 } 1860 1861 static void 1862 sdhci_finish_command(struct sdhci_slot *slot) 1863 { 1864 int i; 1865 uint32_t val; 1866 uint8_t extra; 1867 1868 if (__predict_false(sdhci_debug > 1)) 1869 slot_printf(slot, "%s: called, err %d flags %#04x\n", 1870 __func__, slot->curcmd->error, slot->curcmd->flags); 1871 slot->cmd_done = 1; 1872 /* 1873 * Interrupt aggregation: Restore command interrupt. 1874 * Main restore point for the case when command interrupt 1875 * happened first. 1876 */ 1877 if (__predict_true(slot->curcmd->opcode != MMC_SEND_TUNING_BLOCK && 1878 slot->curcmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)) 1879 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask |= 1880 SDHCI_INT_RESPONSE); 1881 /* In case of error - reset host and return. */ 1882 if (slot->curcmd->error) { 1883 if (slot->curcmd->error == MMC_ERR_BADCRC) 1884 slot->retune_req |= SDHCI_RETUNE_REQ_RESET; 1885 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD); 1886 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_DATA); 1887 sdhci_start(slot); 1888 return; 1889 } 1890 /* If command has response - fetch it. */ 1891 if (slot->curcmd->flags & MMC_RSP_PRESENT) { 1892 if (slot->curcmd->flags & MMC_RSP_136) { 1893 /* CRC is stripped so we need one byte shift. */ 1894 extra = 0; 1895 for (i = 0; i < 4; i++) { 1896 val = RD4(slot, SDHCI_RESPONSE + i * 4); 1897 if (slot->quirks & 1898 SDHCI_QUIRK_DONT_SHIFT_RESPONSE) 1899 slot->curcmd->resp[3 - i] = val; 1900 else { 1901 slot->curcmd->resp[3 - i] = 1902 (val << 8) | extra; 1903 extra = val >> 24; 1904 } 1905 } 1906 } else 1907 slot->curcmd->resp[0] = RD4(slot, SDHCI_RESPONSE); 1908 } 1909 if (__predict_false(sdhci_debug > 1)) 1910 slot_printf(slot, "Resp: %#04x %#04x %#04x %#04x\n", 1911 slot->curcmd->resp[0], slot->curcmd->resp[1], 1912 slot->curcmd->resp[2], slot->curcmd->resp[3]); 1913 1914 /* If data ready - finish. */ 1915 if (slot->data_done) 1916 sdhci_start(slot); 1917 } 1918 1919 static void 1920 sdhci_start_data(struct sdhci_slot *slot, const struct mmc_data *data) 1921 { 1922 uint32_t blkcnt, blksz, current_timeout, sdma_bbufsz, target_timeout; 1923 uint8_t div; 1924 1925 if (data == NULL && (slot->curcmd->flags & MMC_RSP_BUSY) == 0) { 1926 slot->data_done = 1; 1927 return; 1928 } 1929 1930 slot->data_done = 0; 1931 1932 /* Calculate and set data timeout.*/ 1933 /* XXX: We should have this from mmc layer, now assume 1 sec. */ 1934 if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) { 1935 div = 0xE; 1936 } else { 1937 target_timeout = 1000000; 1938 div = 0; 1939 current_timeout = (1 << 13) * 1000 / slot->timeout_clk; 1940 while (current_timeout < target_timeout && div < 0xE) { 1941 ++div; 1942 current_timeout <<= 1; 1943 } 1944 /* Compensate for an off-by-one error in the CaFe chip.*/ 1945 if (div < 0xE && 1946 (slot->quirks & SDHCI_QUIRK_INCR_TIMEOUT_CONTROL)) { 1947 ++div; 1948 } 1949 } 1950 WR1(slot, SDHCI_TIMEOUT_CONTROL, div); 1951 1952 if (data == NULL) 1953 return; 1954 1955 /* Use DMA if possible. */ 1956 if ((slot->opt & SDHCI_HAVE_DMA)) 1957 slot->flags |= SDHCI_USE_DMA; 1958 /* If data is small, broken DMA may return zeroes instead of data. */ 1959 if ((slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS) && 1960 (data->len <= 512)) 1961 slot->flags &= ~SDHCI_USE_DMA; 1962 /* Some controllers require even block sizes. */ 1963 if ((slot->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) && 1964 ((data->len) & 0x3)) 1965 slot->flags &= ~SDHCI_USE_DMA; 1966 /* Load DMA buffer. */ 1967 if (slot->flags & SDHCI_USE_DMA) { 1968 sdma_bbufsz = slot->sdma_bbufsz; 1969 if (data->flags & MMC_DATA_READ) 1970 bus_dmamap_sync(slot->dmatag, slot->dmamap, 1971 BUS_DMASYNC_PREREAD); 1972 else { 1973 memcpy(slot->dmamem, data->data, ulmin(data->len, 1974 sdma_bbufsz)); 1975 bus_dmamap_sync(slot->dmatag, slot->dmamap, 1976 BUS_DMASYNC_PREWRITE); 1977 } 1978 WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr); 1979 /* 1980 * Interrupt aggregation: Mask border interrupt for the last 1981 * bounce buffer and unmask otherwise. 1982 */ 1983 if (data->len == sdma_bbufsz) 1984 slot->intmask &= ~SDHCI_INT_DMA_END; 1985 else 1986 slot->intmask |= SDHCI_INT_DMA_END; 1987 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 1988 } 1989 /* Current data offset for both PIO and DMA. */ 1990 slot->offset = 0; 1991 #ifdef MMCCAM 1992 if (data->flags & MMC_DATA_BLOCK_SIZE) { 1993 /* Set block size and request border interrupts on the SDMA boundary. */ 1994 blksz = SDHCI_MAKE_BLKSZ(slot->sdma_boundary, data->block_size); 1995 blkcnt = data->block_count; 1996 if (__predict_false(sdhci_debug > 0)) 1997 slot_printf(slot, "SDIO Custom block params: blksz: " 1998 "%#10x, blk cnt: %#10x\n", blksz, blkcnt); 1999 } else 2000 #endif 2001 { 2002 /* Set block size and request border interrupts on the SDMA boundary. */ 2003 blksz = SDHCI_MAKE_BLKSZ(slot->sdma_boundary, ulmin(data->len, 512)); 2004 blkcnt = howmany(data->len, 512); 2005 } 2006 2007 WR2(slot, SDHCI_BLOCK_SIZE, blksz); 2008 WR2(slot, SDHCI_BLOCK_COUNT, blkcnt); 2009 if (__predict_false(sdhci_debug > 1)) 2010 slot_printf(slot, "Blk size: 0x%08x | Blk cnt: 0x%08x\n", 2011 blksz, blkcnt); 2012 } 2013 2014 void 2015 sdhci_finish_data(struct sdhci_slot *slot) 2016 { 2017 struct mmc_data *data = slot->curcmd->data; 2018 size_t left; 2019 2020 /* Interrupt aggregation: Restore command interrupt. 2021 * Auxiliary restore point for the case when data interrupt 2022 * happened first. */ 2023 if (!slot->cmd_done) { 2024 WR4(slot, SDHCI_SIGNAL_ENABLE, 2025 slot->intmask |= SDHCI_INT_RESPONSE); 2026 } 2027 /* Unload rest of data from DMA buffer. */ 2028 if (!slot->data_done && (slot->flags & SDHCI_USE_DMA) && 2029 slot->curcmd->data != NULL) { 2030 if (data->flags & MMC_DATA_READ) { 2031 left = data->len - slot->offset; 2032 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2033 BUS_DMASYNC_POSTREAD); 2034 memcpy((u_char*)data->data + slot->offset, slot->dmamem, 2035 ulmin(left, slot->sdma_bbufsz)); 2036 } else 2037 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2038 BUS_DMASYNC_POSTWRITE); 2039 } 2040 slot->data_done = 1; 2041 /* If there was error - reset the host. */ 2042 if (slot->curcmd->error) { 2043 if (slot->curcmd->error == MMC_ERR_BADCRC) 2044 slot->retune_req |= SDHCI_RETUNE_REQ_RESET; 2045 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD); 2046 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_DATA); 2047 sdhci_start(slot); 2048 return; 2049 } 2050 /* If we already have command response - finish. */ 2051 if (slot->cmd_done) 2052 sdhci_start(slot); 2053 } 2054 2055 #ifdef MMCCAM 2056 static void 2057 sdhci_start(struct sdhci_slot *slot) 2058 { 2059 union ccb *ccb; 2060 struct ccb_mmcio *mmcio; 2061 2062 ccb = slot->ccb; 2063 if (ccb == NULL) 2064 return; 2065 2066 mmcio = &ccb->mmcio; 2067 if (!(slot->flags & CMD_STARTED)) { 2068 slot->flags |= CMD_STARTED; 2069 sdhci_start_command(slot, &mmcio->cmd); 2070 return; 2071 } 2072 2073 /* 2074 * Old stack doesn't use this! 2075 * Enabling this code causes significant performance degradation 2076 * and IRQ storms on BBB, Wandboard behaves fine. 2077 * Not using this code does no harm... 2078 if (!(slot->flags & STOP_STARTED) && mmcio->stop.opcode != 0) { 2079 slot->flags |= STOP_STARTED; 2080 sdhci_start_command(slot, &mmcio->stop); 2081 return; 2082 } 2083 */ 2084 if (__predict_false(sdhci_debug > 1)) 2085 slot_printf(slot, "result: %d\n", mmcio->cmd.error); 2086 if (mmcio->cmd.error == 0 && 2087 (slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) { 2088 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD); 2089 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_DATA); 2090 } 2091 2092 sdhci_req_done(slot); 2093 } 2094 #else 2095 static void 2096 sdhci_start(struct sdhci_slot *slot) 2097 { 2098 const struct mmc_request *req; 2099 2100 req = slot->req; 2101 if (req == NULL) 2102 return; 2103 2104 if (!(slot->flags & CMD_STARTED)) { 2105 slot->flags |= CMD_STARTED; 2106 sdhci_start_command(slot, req->cmd); 2107 return; 2108 } 2109 if ((slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP) && 2110 !(slot->flags & STOP_STARTED) && req->stop) { 2111 slot->flags |= STOP_STARTED; 2112 sdhci_start_command(slot, req->stop); 2113 return; 2114 } 2115 if (__predict_false(sdhci_debug > 1)) 2116 slot_printf(slot, "result: %d\n", req->cmd->error); 2117 if (!req->cmd->error && 2118 ((slot->curcmd == req->stop && 2119 (slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP)) || 2120 (slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { 2121 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD); 2122 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_DATA); 2123 } 2124 2125 sdhci_req_done(slot); 2126 } 2127 #endif 2128 2129 int 2130 sdhci_generic_request(device_t brdev __unused, device_t reqdev, 2131 struct mmc_request *req) 2132 { 2133 struct sdhci_slot *slot = device_get_ivars(reqdev); 2134 2135 SDHCI_LOCK(slot); 2136 if (slot->req != NULL) { 2137 SDHCI_UNLOCK(slot); 2138 return (EBUSY); 2139 } 2140 if (__predict_false(sdhci_debug > 1)) { 2141 slot_printf(slot, 2142 "CMD%u arg %#x flags %#x dlen %u dflags %#x\n", 2143 req->cmd->opcode, req->cmd->arg, req->cmd->flags, 2144 (req->cmd->data)?(u_int)req->cmd->data->len:0, 2145 (req->cmd->data)?req->cmd->data->flags:0); 2146 } 2147 slot->req = req; 2148 slot->flags = 0; 2149 sdhci_start(slot); 2150 SDHCI_UNLOCK(slot); 2151 if (dumping) { 2152 while (slot->req != NULL) { 2153 sdhci_generic_intr(slot); 2154 DELAY(10); 2155 } 2156 } 2157 return (0); 2158 } 2159 2160 int 2161 sdhci_generic_get_ro(device_t brdev __unused, device_t reqdev) 2162 { 2163 struct sdhci_slot *slot = device_get_ivars(reqdev); 2164 uint32_t val; 2165 2166 SDHCI_LOCK(slot); 2167 val = RD4(slot, SDHCI_PRESENT_STATE); 2168 SDHCI_UNLOCK(slot); 2169 return (!(val & SDHCI_WRITE_PROTECT)); 2170 } 2171 2172 int 2173 sdhci_generic_acquire_host(device_t brdev __unused, device_t reqdev) 2174 { 2175 struct sdhci_slot *slot = device_get_ivars(reqdev); 2176 int err = 0; 2177 2178 SDHCI_LOCK(slot); 2179 while (slot->bus_busy) 2180 msleep(slot, &slot->mtx, 0, "sdhciah", 0); 2181 slot->bus_busy++; 2182 /* Activate led. */ 2183 WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl |= SDHCI_CTRL_LED); 2184 SDHCI_UNLOCK(slot); 2185 return (err); 2186 } 2187 2188 int 2189 sdhci_generic_release_host(device_t brdev __unused, device_t reqdev) 2190 { 2191 struct sdhci_slot *slot = device_get_ivars(reqdev); 2192 2193 SDHCI_LOCK(slot); 2194 /* Deactivate led. */ 2195 WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl &= ~SDHCI_CTRL_LED); 2196 slot->bus_busy--; 2197 wakeup(slot); 2198 SDHCI_UNLOCK(slot); 2199 return (0); 2200 } 2201 2202 static void 2203 sdhci_cmd_irq(struct sdhci_slot *slot, uint32_t intmask) 2204 { 2205 2206 if (!slot->curcmd) { 2207 slot_printf(slot, "Got command interrupt 0x%08x, but " 2208 "there is no active command.\n", intmask); 2209 sdhci_dumpregs(slot); 2210 return; 2211 } 2212 if (intmask & SDHCI_INT_TIMEOUT) 2213 slot->curcmd->error = MMC_ERR_TIMEOUT; 2214 else if (intmask & SDHCI_INT_CRC) 2215 slot->curcmd->error = MMC_ERR_BADCRC; 2216 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) 2217 slot->curcmd->error = MMC_ERR_FIFO; 2218 2219 sdhci_finish_command(slot); 2220 } 2221 2222 static void 2223 sdhci_data_irq(struct sdhci_slot *slot, uint32_t intmask) 2224 { 2225 struct mmc_data *data; 2226 size_t left; 2227 uint32_t sdma_bbufsz; 2228 2229 if (!slot->curcmd) { 2230 slot_printf(slot, "Got data interrupt 0x%08x, but " 2231 "there is no active command.\n", intmask); 2232 sdhci_dumpregs(slot); 2233 return; 2234 } 2235 if (slot->curcmd->data == NULL && 2236 (slot->curcmd->flags & MMC_RSP_BUSY) == 0) { 2237 slot_printf(slot, "Got data interrupt 0x%08x, but " 2238 "there is no active data operation.\n", 2239 intmask); 2240 sdhci_dumpregs(slot); 2241 return; 2242 } 2243 if (intmask & SDHCI_INT_DATA_TIMEOUT) 2244 slot->curcmd->error = MMC_ERR_TIMEOUT; 2245 else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT)) 2246 slot->curcmd->error = MMC_ERR_BADCRC; 2247 if (slot->curcmd->data == NULL && 2248 (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | 2249 SDHCI_INT_DMA_END))) { 2250 slot_printf(slot, "Got data interrupt 0x%08x, but " 2251 "there is busy-only command.\n", intmask); 2252 sdhci_dumpregs(slot); 2253 slot->curcmd->error = MMC_ERR_INVALID; 2254 } 2255 if (slot->curcmd->error) { 2256 /* No need to continue after any error. */ 2257 goto done; 2258 } 2259 2260 /* Handle tuning completion interrupt. */ 2261 if (__predict_false((intmask & SDHCI_INT_DATA_AVAIL) && 2262 (slot->curcmd->opcode == MMC_SEND_TUNING_BLOCK || 2263 slot->curcmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) { 2264 slot->req->flags |= MMC_TUNE_DONE; 2265 sdhci_finish_command(slot); 2266 sdhci_finish_data(slot); 2267 return; 2268 } 2269 /* Handle PIO interrupt. */ 2270 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) { 2271 if ((slot->opt & SDHCI_PLATFORM_TRANSFER) && 2272 SDHCI_PLATFORM_WILL_HANDLE(slot->bus, slot)) { 2273 SDHCI_PLATFORM_START_TRANSFER(slot->bus, slot, 2274 &intmask); 2275 slot->flags |= PLATFORM_DATA_STARTED; 2276 } else 2277 sdhci_transfer_pio(slot); 2278 } 2279 /* Handle DMA border. */ 2280 if (intmask & SDHCI_INT_DMA_END) { 2281 data = slot->curcmd->data; 2282 sdma_bbufsz = slot->sdma_bbufsz; 2283 2284 /* Unload DMA buffer ... */ 2285 left = data->len - slot->offset; 2286 if (data->flags & MMC_DATA_READ) { 2287 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2288 BUS_DMASYNC_POSTREAD); 2289 memcpy((u_char*)data->data + slot->offset, slot->dmamem, 2290 ulmin(left, sdma_bbufsz)); 2291 } else { 2292 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2293 BUS_DMASYNC_POSTWRITE); 2294 } 2295 /* ... and reload it again. */ 2296 slot->offset += sdma_bbufsz; 2297 left = data->len - slot->offset; 2298 if (data->flags & MMC_DATA_READ) { 2299 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2300 BUS_DMASYNC_PREREAD); 2301 } else { 2302 memcpy(slot->dmamem, (u_char*)data->data + slot->offset, 2303 ulmin(left, sdma_bbufsz)); 2304 bus_dmamap_sync(slot->dmatag, slot->dmamap, 2305 BUS_DMASYNC_PREWRITE); 2306 } 2307 /* 2308 * Interrupt aggregation: Mask border interrupt for the last 2309 * bounce buffer. 2310 */ 2311 if (left == sdma_bbufsz) { 2312 slot->intmask &= ~SDHCI_INT_DMA_END; 2313 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 2314 } 2315 /* Restart DMA. */ 2316 WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr); 2317 } 2318 /* We have got all data. */ 2319 if (intmask & SDHCI_INT_DATA_END) { 2320 if (slot->flags & PLATFORM_DATA_STARTED) { 2321 slot->flags &= ~PLATFORM_DATA_STARTED; 2322 SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot); 2323 } else 2324 sdhci_finish_data(slot); 2325 } 2326 done: 2327 if (slot->curcmd != NULL && slot->curcmd->error != 0) { 2328 if (slot->flags & PLATFORM_DATA_STARTED) { 2329 slot->flags &= ~PLATFORM_DATA_STARTED; 2330 SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot); 2331 } else 2332 sdhci_finish_data(slot); 2333 } 2334 } 2335 2336 static void 2337 sdhci_acmd_irq(struct sdhci_slot *slot, uint16_t acmd_err) 2338 { 2339 2340 if (!slot->curcmd) { 2341 slot_printf(slot, "Got AutoCMD12 error 0x%04x, but " 2342 "there is no active command.\n", acmd_err); 2343 sdhci_dumpregs(slot); 2344 return; 2345 } 2346 slot_printf(slot, "Got AutoCMD12 error 0x%04x\n", acmd_err); 2347 SDHCI_RESET(slot->bus, slot, SDHCI_RESET_CMD); 2348 } 2349 2350 void 2351 sdhci_generic_intr(struct sdhci_slot *slot) 2352 { 2353 uint32_t intmask, present; 2354 uint16_t val16; 2355 2356 SDHCI_LOCK(slot); 2357 /* Read slot interrupt status. */ 2358 intmask = RD4(slot, SDHCI_INT_STATUS); 2359 if (intmask == 0 || intmask == 0xffffffff) { 2360 SDHCI_UNLOCK(slot); 2361 return; 2362 } 2363 if (__predict_false(sdhci_debug > 2)) 2364 slot_printf(slot, "Interrupt %#x\n", intmask); 2365 2366 /* Handle tuning error interrupt. */ 2367 if (__predict_false(intmask & SDHCI_INT_TUNEERR)) { 2368 WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_TUNEERR); 2369 slot_printf(slot, "Tuning error indicated\n"); 2370 slot->retune_req |= SDHCI_RETUNE_REQ_RESET; 2371 if (slot->curcmd) { 2372 slot->curcmd->error = MMC_ERR_BADCRC; 2373 sdhci_finish_command(slot); 2374 } 2375 } 2376 /* Handle re-tuning interrupt. */ 2377 if (__predict_false(intmask & SDHCI_INT_RETUNE)) 2378 slot->retune_req |= SDHCI_RETUNE_REQ_NEEDED; 2379 /* Handle card presence interrupts. */ 2380 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { 2381 present = (intmask & SDHCI_INT_CARD_INSERT) != 0; 2382 slot->intmask &= 2383 ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); 2384 slot->intmask |= present ? SDHCI_INT_CARD_REMOVE : 2385 SDHCI_INT_CARD_INSERT; 2386 WR4(slot, SDHCI_INT_ENABLE, slot->intmask); 2387 WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); 2388 WR4(slot, SDHCI_INT_STATUS, intmask & 2389 (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)); 2390 sdhci_handle_card_present_locked(slot, present); 2391 } 2392 /* Handle command interrupts. */ 2393 if (intmask & SDHCI_INT_CMD_MASK) { 2394 WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_CMD_MASK); 2395 sdhci_cmd_irq(slot, intmask & SDHCI_INT_CMD_MASK); 2396 } 2397 /* Handle data interrupts. */ 2398 if (intmask & SDHCI_INT_DATA_MASK) { 2399 WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_DATA_MASK); 2400 /* Don't call data_irq in case of errored command. */ 2401 if ((intmask & SDHCI_INT_CMD_ERROR_MASK) == 0) 2402 sdhci_data_irq(slot, intmask & SDHCI_INT_DATA_MASK); 2403 } 2404 /* Handle AutoCMD12 error interrupt. */ 2405 if (intmask & SDHCI_INT_ACMD12ERR) { 2406 /* Clearing SDHCI_INT_ACMD12ERR may clear SDHCI_ACMD12_ERR. */ 2407 val16 = RD2(slot, SDHCI_ACMD12_ERR); 2408 WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_ACMD12ERR); 2409 sdhci_acmd_irq(slot, val16); 2410 } 2411 /* Handle bus power interrupt. */ 2412 if (intmask & SDHCI_INT_BUS_POWER) { 2413 WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_BUS_POWER); 2414 slot_printf(slot, "Card is consuming too much power!\n"); 2415 } 2416 intmask &= ~(SDHCI_INT_ERROR | SDHCI_INT_TUNEERR | SDHCI_INT_RETUNE | 2417 SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE | SDHCI_INT_CMD_MASK | 2418 SDHCI_INT_DATA_MASK | SDHCI_INT_ACMD12ERR | SDHCI_INT_BUS_POWER); 2419 /* The rest is unknown. */ 2420 if (intmask) { 2421 WR4(slot, SDHCI_INT_STATUS, intmask); 2422 slot_printf(slot, "Unexpected interrupt 0x%08x.\n", 2423 intmask); 2424 sdhci_dumpregs(slot); 2425 } 2426 2427 SDHCI_UNLOCK(slot); 2428 } 2429 2430 int 2431 sdhci_generic_read_ivar(device_t bus, device_t child, int which, 2432 uintptr_t *result) 2433 { 2434 const struct sdhci_slot *slot = device_get_ivars(child); 2435 2436 switch (which) { 2437 default: 2438 return (EINVAL); 2439 case MMCBR_IVAR_BUS_MODE: 2440 *result = slot->host.ios.bus_mode; 2441 break; 2442 case MMCBR_IVAR_BUS_WIDTH: 2443 *result = slot->host.ios.bus_width; 2444 break; 2445 case MMCBR_IVAR_CHIP_SELECT: 2446 *result = slot->host.ios.chip_select; 2447 break; 2448 case MMCBR_IVAR_CLOCK: 2449 *result = slot->host.ios.clock; 2450 break; 2451 case MMCBR_IVAR_F_MIN: 2452 *result = slot->host.f_min; 2453 break; 2454 case MMCBR_IVAR_F_MAX: 2455 *result = slot->host.f_max; 2456 break; 2457 case MMCBR_IVAR_HOST_OCR: 2458 *result = slot->host.host_ocr; 2459 break; 2460 case MMCBR_IVAR_MODE: 2461 *result = slot->host.mode; 2462 break; 2463 case MMCBR_IVAR_OCR: 2464 *result = slot->host.ocr; 2465 break; 2466 case MMCBR_IVAR_POWER_MODE: 2467 *result = slot->host.ios.power_mode; 2468 break; 2469 case MMCBR_IVAR_VDD: 2470 *result = slot->host.ios.vdd; 2471 break; 2472 case MMCBR_IVAR_RETUNE_REQ: 2473 if (slot->opt & SDHCI_TUNING_ENABLED) { 2474 if (slot->retune_req & SDHCI_RETUNE_REQ_RESET) { 2475 *result = retune_req_reset; 2476 break; 2477 } 2478 if (slot->retune_req & SDHCI_RETUNE_REQ_NEEDED) { 2479 *result = retune_req_normal; 2480 break; 2481 } 2482 } 2483 *result = retune_req_none; 2484 break; 2485 case MMCBR_IVAR_VCCQ: 2486 *result = slot->host.ios.vccq; 2487 break; 2488 case MMCBR_IVAR_CAPS: 2489 *result = slot->host.caps; 2490 break; 2491 case MMCBR_IVAR_TIMING: 2492 *result = slot->host.ios.timing; 2493 break; 2494 case MMCBR_IVAR_MAX_DATA: 2495 /* 2496 * Re-tuning modes 1 and 2 restrict the maximum data length 2497 * per read/write command to 4 MiB. 2498 */ 2499 if (slot->opt & SDHCI_TUNING_ENABLED && 2500 (slot->retune_mode == SDHCI_RETUNE_MODE_1 || 2501 slot->retune_mode == SDHCI_RETUNE_MODE_2)) { 2502 *result = 4 * 1024 * 1024 / MMC_SECTOR_SIZE; 2503 break; 2504 } 2505 *result = 65535; 2506 break; 2507 case MMCBR_IVAR_MAX_BUSY_TIMEOUT: 2508 /* 2509 * Currently, sdhci_start_data() hardcodes 1 s for all CMDs. 2510 */ 2511 *result = 1000000; 2512 break; 2513 } 2514 return (0); 2515 } 2516 2517 int 2518 sdhci_generic_write_ivar(device_t bus, device_t child, int which, 2519 uintptr_t value) 2520 { 2521 struct sdhci_slot *slot = device_get_ivars(child); 2522 uint32_t clock, max_clock; 2523 int i; 2524 2525 if (sdhci_debug > 1) 2526 slot_printf(slot, "%s: var=%d\n", __func__, which); 2527 switch (which) { 2528 default: 2529 return (EINVAL); 2530 case MMCBR_IVAR_BUS_MODE: 2531 slot->host.ios.bus_mode = value; 2532 break; 2533 case MMCBR_IVAR_BUS_WIDTH: 2534 slot->host.ios.bus_width = value; 2535 break; 2536 case MMCBR_IVAR_CHIP_SELECT: 2537 slot->host.ios.chip_select = value; 2538 break; 2539 case MMCBR_IVAR_CLOCK: 2540 if (value > 0) { 2541 max_clock = slot->max_clk; 2542 clock = max_clock; 2543 2544 if (slot->version < SDHCI_SPEC_300) { 2545 for (i = 0; i < SDHCI_200_MAX_DIVIDER; 2546 i <<= 1) { 2547 if (clock <= value) 2548 break; 2549 clock >>= 1; 2550 } 2551 } else { 2552 for (i = 0; i < SDHCI_300_MAX_DIVIDER; 2553 i += 2) { 2554 if (clock <= value) 2555 break; 2556 clock = max_clock / (i + 2); 2557 } 2558 } 2559 2560 slot->host.ios.clock = clock; 2561 } else 2562 slot->host.ios.clock = 0; 2563 break; 2564 case MMCBR_IVAR_MODE: 2565 slot->host.mode = value; 2566 break; 2567 case MMCBR_IVAR_OCR: 2568 slot->host.ocr = value; 2569 break; 2570 case MMCBR_IVAR_POWER_MODE: 2571 slot->host.ios.power_mode = value; 2572 break; 2573 case MMCBR_IVAR_VDD: 2574 slot->host.ios.vdd = value; 2575 break; 2576 case MMCBR_IVAR_VCCQ: 2577 slot->host.ios.vccq = value; 2578 break; 2579 case MMCBR_IVAR_TIMING: 2580 slot->host.ios.timing = value; 2581 break; 2582 case MMCBR_IVAR_CAPS: 2583 case MMCBR_IVAR_HOST_OCR: 2584 case MMCBR_IVAR_F_MIN: 2585 case MMCBR_IVAR_F_MAX: 2586 case MMCBR_IVAR_MAX_DATA: 2587 case MMCBR_IVAR_RETUNE_REQ: 2588 return (EINVAL); 2589 } 2590 return (0); 2591 } 2592 2593 #ifdef MMCCAM 2594 void 2595 sdhci_start_slot(struct sdhci_slot *slot) 2596 { 2597 2598 if ((slot->devq = cam_simq_alloc(1)) == NULL) 2599 goto fail; 2600 2601 mtx_init(&slot->sim_mtx, "sdhcisim", NULL, MTX_DEF); 2602 slot->sim = cam_sim_alloc(sdhci_cam_action, sdhci_cam_poll, 2603 "sdhci_slot", slot, device_get_unit(slot->bus), 2604 &slot->sim_mtx, 1, 1, slot->devq); 2605 2606 if (slot->sim == NULL) { 2607 cam_simq_free(slot->devq); 2608 slot_printf(slot, "cannot allocate CAM SIM\n"); 2609 goto fail; 2610 } 2611 2612 mtx_lock(&slot->sim_mtx); 2613 if (xpt_bus_register(slot->sim, slot->bus, 0) != 0) { 2614 slot_printf(slot, "cannot register SCSI pass-through bus\n"); 2615 cam_sim_free(slot->sim, FALSE); 2616 cam_simq_free(slot->devq); 2617 mtx_unlock(&slot->sim_mtx); 2618 goto fail; 2619 } 2620 mtx_unlock(&slot->sim_mtx); 2621 2622 /* End CAM-specific init */ 2623 slot->card_present = 0; 2624 sdhci_card_task(slot, 0); 2625 return; 2626 2627 fail: 2628 if (slot->sim != NULL) { 2629 mtx_lock(&slot->sim_mtx); 2630 xpt_bus_deregister(cam_sim_path(slot->sim)); 2631 cam_sim_free(slot->sim, FALSE); 2632 mtx_unlock(&slot->sim_mtx); 2633 } 2634 2635 if (slot->devq != NULL) 2636 cam_simq_free(slot->devq); 2637 } 2638 2639 void 2640 sdhci_cam_action(struct cam_sim *sim, union ccb *ccb) 2641 { 2642 struct sdhci_slot *slot; 2643 2644 slot = cam_sim_softc(sim); 2645 if (slot == NULL) { 2646 ccb->ccb_h.status = CAM_SEL_TIMEOUT; 2647 xpt_done(ccb); 2648 return; 2649 } 2650 2651 mtx_assert(&slot->sim_mtx, MA_OWNED); 2652 2653 switch (ccb->ccb_h.func_code) { 2654 case XPT_PATH_INQ: 2655 mmc_path_inq(&ccb->cpi, "Deglitch Networks", sim, maxphys); 2656 break; 2657 2658 case XPT_MMC_GET_TRAN_SETTINGS: 2659 case XPT_GET_TRAN_SETTINGS: 2660 { 2661 struct ccb_trans_settings *cts = &ccb->cts; 2662 uint32_t max_data; 2663 2664 if (sdhci_debug > 1) 2665 slot_printf(slot, "Got XPT_GET_TRAN_SETTINGS\n"); 2666 2667 cts->protocol = PROTO_MMCSD; 2668 cts->protocol_version = 1; 2669 cts->transport = XPORT_MMCSD; 2670 cts->transport_version = 1; 2671 cts->xport_specific.valid = 0; 2672 cts->proto_specific.mmc.host_ocr = slot->host.host_ocr; 2673 cts->proto_specific.mmc.host_f_min = slot->host.f_min; 2674 cts->proto_specific.mmc.host_f_max = slot->host.f_max; 2675 cts->proto_specific.mmc.host_caps = slot->host.caps; 2676 /* 2677 * Re-tuning modes 1 and 2 restrict the maximum data length 2678 * per read/write command to 4 MiB. 2679 */ 2680 if (slot->opt & SDHCI_TUNING_ENABLED && 2681 (slot->retune_mode == SDHCI_RETUNE_MODE_1 || 2682 slot->retune_mode == SDHCI_RETUNE_MODE_2)) { 2683 max_data = 4 * 1024 * 1024 / MMC_SECTOR_SIZE; 2684 } else { 2685 max_data = 65535; 2686 } 2687 cts->proto_specific.mmc.host_max_data = max_data; 2688 2689 memcpy(&cts->proto_specific.mmc.ios, &slot->host.ios, sizeof(struct mmc_ios)); 2690 ccb->ccb_h.status = CAM_REQ_CMP; 2691 break; 2692 } 2693 case XPT_MMC_SET_TRAN_SETTINGS: 2694 case XPT_SET_TRAN_SETTINGS: 2695 if (sdhci_debug > 1) 2696 slot_printf(slot, "Got XPT_SET_TRAN_SETTINGS\n"); 2697 sdhci_cam_settran_settings(slot, ccb); 2698 ccb->ccb_h.status = CAM_REQ_CMP; 2699 break; 2700 case XPT_RESET_BUS: 2701 if (sdhci_debug > 1) 2702 slot_printf(slot, "Got XPT_RESET_BUS, ACK it...\n"); 2703 ccb->ccb_h.status = CAM_REQ_CMP; 2704 break; 2705 case XPT_MMC_IO: 2706 /* 2707 * Here is the HW-dependent part of 2708 * sending the command to the underlying h/w 2709 * At some point in the future an interrupt comes. 2710 * Then the request will be marked as completed. 2711 */ 2712 if (__predict_false(sdhci_debug > 1)) 2713 slot_printf(slot, "Got XPT_MMC_IO\n"); 2714 ccb->ccb_h.status = CAM_REQ_INPROG; 2715 2716 sdhci_cam_request(cam_sim_softc(sim), ccb); 2717 return; 2718 default: 2719 ccb->ccb_h.status = CAM_REQ_INVALID; 2720 break; 2721 } 2722 xpt_done(ccb); 2723 return; 2724 } 2725 2726 void 2727 sdhci_cam_poll(struct cam_sim *sim) 2728 { 2729 sdhci_generic_intr(cam_sim_softc(sim)); 2730 } 2731 2732 static int 2733 sdhci_cam_get_possible_host_clock(const struct sdhci_slot *slot, 2734 int proposed_clock) 2735 { 2736 int max_clock, clock, i; 2737 2738 if (proposed_clock == 0) 2739 return 0; 2740 max_clock = slot->max_clk; 2741 clock = max_clock; 2742 2743 if (slot->version < SDHCI_SPEC_300) { 2744 for (i = 0; i < SDHCI_200_MAX_DIVIDER; i <<= 1) { 2745 if (clock <= proposed_clock) 2746 break; 2747 clock >>= 1; 2748 } 2749 } else { 2750 for (i = 0; i < SDHCI_300_MAX_DIVIDER; i += 2) { 2751 if (clock <= proposed_clock) 2752 break; 2753 clock = max_clock / (i + 2); 2754 } 2755 } 2756 return clock; 2757 } 2758 2759 static int 2760 sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb) 2761 { 2762 struct mmc_ios *ios; 2763 const struct mmc_ios *new_ios; 2764 const struct ccb_trans_settings_mmc *cts; 2765 2766 ios = &slot->host.ios; 2767 cts = &ccb->cts.proto_specific.mmc; 2768 new_ios = &cts->ios; 2769 2770 /* Update only requested fields */ 2771 if (cts->ios_valid & MMC_CLK) { 2772 ios->clock = sdhci_cam_get_possible_host_clock(slot, new_ios->clock); 2773 if (sdhci_debug > 1) 2774 slot_printf(slot, "Clock => %d\n", ios->clock); 2775 } 2776 if (cts->ios_valid & MMC_VDD) { 2777 ios->vdd = new_ios->vdd; 2778 if (sdhci_debug > 1) 2779 slot_printf(slot, "VDD => %d\n", ios->vdd); 2780 } 2781 if (cts->ios_valid & MMC_CS) { 2782 ios->chip_select = new_ios->chip_select; 2783 if (sdhci_debug > 1) 2784 slot_printf(slot, "CS => %d\n", ios->chip_select); 2785 } 2786 if (cts->ios_valid & MMC_BW) { 2787 ios->bus_width = new_ios->bus_width; 2788 if (sdhci_debug > 1) 2789 slot_printf(slot, "Bus width => %d\n", ios->bus_width); 2790 } 2791 if (cts->ios_valid & MMC_PM) { 2792 ios->power_mode = new_ios->power_mode; 2793 if (sdhci_debug > 1) 2794 slot_printf(slot, "Power mode => %d\n", ios->power_mode); 2795 } 2796 if (cts->ios_valid & MMC_BT) { 2797 ios->timing = new_ios->timing; 2798 if (sdhci_debug > 1) 2799 slot_printf(slot, "Timing => %d\n", ios->timing); 2800 } 2801 if (cts->ios_valid & MMC_BM) { 2802 ios->bus_mode = new_ios->bus_mode; 2803 if (sdhci_debug > 1) 2804 slot_printf(slot, "Bus mode => %d\n", ios->bus_mode); 2805 } 2806 if (cts->ios_valid & MMC_VCCQ) { 2807 ios->vccq = new_ios->vccq; 2808 if (sdhci_debug > 1) 2809 slot_printf(slot, "VCCQ => %d\n", ios->vccq); 2810 } 2811 2812 /* XXX Provide a way to call a chip-specific IOS update, required for TI */ 2813 return (sdhci_cam_update_ios(slot)); 2814 } 2815 2816 static int 2817 sdhci_cam_update_ios(struct sdhci_slot *slot) 2818 { 2819 struct mmc_ios *ios = &slot->host.ios; 2820 2821 if (sdhci_debug > 1) 2822 slot_printf(slot, "%s: power_mode=%d, clk=%d, bus_width=%d, timing=%d\n", 2823 __func__, ios->power_mode, ios->clock, ios->bus_width, ios->timing); 2824 SDHCI_LOCK(slot); 2825 /* Do full reset on bus power down to clear from any state. */ 2826 if (ios->power_mode == power_off) { 2827 WR4(slot, SDHCI_SIGNAL_ENABLE, 0); 2828 sdhci_init(slot); 2829 } 2830 /* Configure the bus. */ 2831 sdhci_set_clock(slot, ios->clock); 2832 sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd); 2833 if (ios->bus_width == bus_width_8) { 2834 slot->hostctrl |= SDHCI_CTRL_8BITBUS; 2835 slot->hostctrl &= ~SDHCI_CTRL_4BITBUS; 2836 } else if (ios->bus_width == bus_width_4) { 2837 slot->hostctrl &= ~SDHCI_CTRL_8BITBUS; 2838 slot->hostctrl |= SDHCI_CTRL_4BITBUS; 2839 } else if (ios->bus_width == bus_width_1) { 2840 slot->hostctrl &= ~SDHCI_CTRL_8BITBUS; 2841 slot->hostctrl &= ~SDHCI_CTRL_4BITBUS; 2842 } else { 2843 panic("Invalid bus width: %d", ios->bus_width); 2844 } 2845 if (ios->timing == bus_timing_hs && 2846 !(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT)) 2847 slot->hostctrl |= SDHCI_CTRL_HISPD; 2848 else 2849 slot->hostctrl &= ~SDHCI_CTRL_HISPD; 2850 WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl); 2851 /* Some controllers like reset after bus changes. */ 2852 if(slot->quirks & SDHCI_QUIRK_RESET_ON_IOS) 2853 SDHCI_RESET(slot->bus, slot, 2854 SDHCI_RESET_CMD | SDHCI_RESET_DATA); 2855 2856 SDHCI_UNLOCK(slot); 2857 return (0); 2858 } 2859 2860 static int 2861 sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb) 2862 { 2863 const struct ccb_mmcio *mmcio; 2864 2865 mmcio = &ccb->mmcio; 2866 2867 SDHCI_LOCK(slot); 2868 /* if (slot->req != NULL) { 2869 SDHCI_UNLOCK(slot); 2870 return (EBUSY); 2871 } 2872 */ 2873 if (__predict_false(sdhci_debug > 1)) { 2874 slot_printf(slot, "CMD%u arg %#x flags %#x dlen %u dflags %#x " 2875 "blksz=%zu blkcnt=%zu\n", 2876 mmcio->cmd.opcode, mmcio->cmd.arg, mmcio->cmd.flags, 2877 mmcio->cmd.data != NULL ? (unsigned int) mmcio->cmd.data->len : 0, 2878 mmcio->cmd.data != NULL ? mmcio->cmd.data->flags : 0, 2879 mmcio->cmd.data != NULL ? mmcio->cmd.data->block_size : 0, 2880 mmcio->cmd.data != NULL ? mmcio->cmd.data->block_count : 0); 2881 } 2882 if (mmcio->cmd.data != NULL) { 2883 if (mmcio->cmd.data->len == 0 || mmcio->cmd.data->flags == 0) 2884 panic("data->len = %d, data->flags = %d -- something is b0rked", 2885 (int)mmcio->cmd.data->len, mmcio->cmd.data->flags); 2886 } 2887 slot->ccb = ccb; 2888 slot->flags = 0; 2889 sdhci_start(slot); 2890 SDHCI_UNLOCK(slot); 2891 return (0); 2892 } 2893 #endif /* MMCCAM */ 2894 2895 MODULE_VERSION(sdhci, SDHCI_VERSION); 2896