1 /* 2 * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc 3 * Andy Fleming 4 * 5 * Based vaguely on the pxa mmc code: 6 * (C) Copyright 2003 7 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <config.h> 13 #include <common.h> 14 #include <command.h> 15 #include <errno.h> 16 #include <hwconfig.h> 17 #include <mmc.h> 18 #include <part.h> 19 #include <malloc.h> 20 #include <fsl_esdhc.h> 21 #include <fdt_support.h> 22 #include <asm/io.h> 23 #include <dm.h> 24 #include <asm-generic/gpio.h> 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 #define SDHCI_IRQ_EN_BITS (IRQSTATEN_CC | IRQSTATEN_TC | \ 29 IRQSTATEN_CINT | \ 30 IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \ 31 IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | \ 32 IRQSTATEN_DEBE | IRQSTATEN_BRR | IRQSTATEN_BWR | \ 33 IRQSTATEN_DINT) 34 35 struct fsl_esdhc { 36 uint dsaddr; /* SDMA system address register */ 37 uint blkattr; /* Block attributes register */ 38 uint cmdarg; /* Command argument register */ 39 uint xfertyp; /* Transfer type register */ 40 uint cmdrsp0; /* Command response 0 register */ 41 uint cmdrsp1; /* Command response 1 register */ 42 uint cmdrsp2; /* Command response 2 register */ 43 uint cmdrsp3; /* Command response 3 register */ 44 uint datport; /* Buffer data port register */ 45 uint prsstat; /* Present state register */ 46 uint proctl; /* Protocol control register */ 47 uint sysctl; /* System Control Register */ 48 uint irqstat; /* Interrupt status register */ 49 uint irqstaten; /* Interrupt status enable register */ 50 uint irqsigen; /* Interrupt signal enable register */ 51 uint autoc12err; /* Auto CMD error status register */ 52 uint hostcapblt; /* Host controller capabilities register */ 53 uint wml; /* Watermark level register */ 54 uint mixctrl; /* For USDHC */ 55 char reserved1[4]; /* reserved */ 56 uint fevt; /* Force event register */ 57 uint admaes; /* ADMA error status register */ 58 uint adsaddr; /* ADMA system address register */ 59 char reserved2[4]; 60 uint dllctrl; 61 uint dllstat; 62 uint clktunectrlstatus; 63 char reserved3[84]; 64 uint vendorspec; 65 uint mmcboot; 66 uint vendorspec2; 67 char reserved4[48]; 68 uint hostver; /* Host controller version register */ 69 char reserved5[4]; /* reserved */ 70 uint dmaerraddr; /* DMA error address register */ 71 char reserved6[4]; /* reserved */ 72 uint dmaerrattr; /* DMA error attribute register */ 73 char reserved7[4]; /* reserved */ 74 uint hostcapblt2; /* Host controller capabilities register 2 */ 75 char reserved8[8]; /* reserved */ 76 uint tcr; /* Tuning control register */ 77 char reserved9[28]; /* reserved */ 78 uint sddirctl; /* SD direction control register */ 79 char reserved10[712];/* reserved */ 80 uint scr; /* eSDHC control register */ 81 }; 82 83 /** 84 * struct fsl_esdhc_priv 85 * 86 * @esdhc_regs: registers of the sdhc controller 87 * @sdhc_clk: Current clk of the sdhc controller 88 * @bus_width: bus width, 1bit, 4bit or 8bit 89 * @cfg: mmc config 90 * @mmc: mmc 91 * Following is used when Driver Model is enabled for MMC 92 * @dev: pointer for the device 93 * @non_removable: 0: removable; 1: non-removable 94 * @wp_enable: 1: enable checking wp; 0: no check 95 * @cd_gpio: gpio for card detection 96 * @wp_gpio: gpio for write protection 97 */ 98 struct fsl_esdhc_priv { 99 struct fsl_esdhc *esdhc_regs; 100 unsigned int sdhc_clk; 101 unsigned int bus_width; 102 struct mmc_config cfg; 103 struct mmc *mmc; 104 struct udevice *dev; 105 int non_removable; 106 int wp_enable; 107 struct gpio_desc cd_gpio; 108 struct gpio_desc wp_gpio; 109 }; 110 111 /* Return the XFERTYP flags for a given command and data packet */ 112 static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data) 113 { 114 uint xfertyp = 0; 115 116 if (data) { 117 xfertyp |= XFERTYP_DPSEL; 118 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO 119 xfertyp |= XFERTYP_DMAEN; 120 #endif 121 if (data->blocks > 1) { 122 xfertyp |= XFERTYP_MSBSEL; 123 xfertyp |= XFERTYP_BCEN; 124 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111 125 xfertyp |= XFERTYP_AC12EN; 126 #endif 127 } 128 129 if (data->flags & MMC_DATA_READ) 130 xfertyp |= XFERTYP_DTDSEL; 131 } 132 133 if (cmd->resp_type & MMC_RSP_CRC) 134 xfertyp |= XFERTYP_CCCEN; 135 if (cmd->resp_type & MMC_RSP_OPCODE) 136 xfertyp |= XFERTYP_CICEN; 137 if (cmd->resp_type & MMC_RSP_136) 138 xfertyp |= XFERTYP_RSPTYP_136; 139 else if (cmd->resp_type & MMC_RSP_BUSY) 140 xfertyp |= XFERTYP_RSPTYP_48_BUSY; 141 else if (cmd->resp_type & MMC_RSP_PRESENT) 142 xfertyp |= XFERTYP_RSPTYP_48; 143 144 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) 145 xfertyp |= XFERTYP_CMDTYP_ABORT; 146 147 return XFERTYP_CMD(cmd->cmdidx) | xfertyp; 148 } 149 150 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO 151 /* 152 * PIO Read/Write Mode reduce the performace as DMA is not used in this mode. 153 */ 154 static void 155 esdhc_pio_read_write(struct mmc *mmc, struct mmc_data *data) 156 { 157 struct fsl_esdhc_priv *priv = mmc->priv; 158 struct fsl_esdhc *regs = priv->esdhc_regs; 159 uint blocks; 160 char *buffer; 161 uint databuf; 162 uint size; 163 uint irqstat; 164 uint timeout; 165 166 if (data->flags & MMC_DATA_READ) { 167 blocks = data->blocks; 168 buffer = data->dest; 169 while (blocks) { 170 timeout = PIO_TIMEOUT; 171 size = data->blocksize; 172 irqstat = esdhc_read32(®s->irqstat); 173 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BREN) 174 && --timeout); 175 if (timeout <= 0) { 176 printf("\nData Read Failed in PIO Mode."); 177 return; 178 } 179 while (size && (!(irqstat & IRQSTAT_TC))) { 180 udelay(100); /* Wait before last byte transfer complete */ 181 irqstat = esdhc_read32(®s->irqstat); 182 databuf = in_le32(®s->datport); 183 *((uint *)buffer) = databuf; 184 buffer += 4; 185 size -= 4; 186 } 187 blocks--; 188 } 189 } else { 190 blocks = data->blocks; 191 buffer = (char *)data->src; 192 while (blocks) { 193 timeout = PIO_TIMEOUT; 194 size = data->blocksize; 195 irqstat = esdhc_read32(®s->irqstat); 196 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_BWEN) 197 && --timeout); 198 if (timeout <= 0) { 199 printf("\nData Write Failed in PIO Mode."); 200 return; 201 } 202 while (size && (!(irqstat & IRQSTAT_TC))) { 203 udelay(100); /* Wait before last byte transfer complete */ 204 databuf = *((uint *)buffer); 205 buffer += 4; 206 size -= 4; 207 irqstat = esdhc_read32(®s->irqstat); 208 out_le32(®s->datport, databuf); 209 } 210 blocks--; 211 } 212 } 213 } 214 #endif 215 216 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data) 217 { 218 int timeout; 219 struct fsl_esdhc_priv *priv = mmc->priv; 220 struct fsl_esdhc *regs = priv->esdhc_regs; 221 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) 222 dma_addr_t addr; 223 #endif 224 uint wml_value; 225 226 wml_value = data->blocksize/4; 227 228 if (data->flags & MMC_DATA_READ) { 229 if (wml_value > WML_RD_WML_MAX) 230 wml_value = WML_RD_WML_MAX_VAL; 231 232 esdhc_clrsetbits32(®s->wml, WML_RD_WML_MASK, wml_value); 233 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO 234 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) 235 addr = virt_to_phys((void *)(data->dest)); 236 if (upper_32_bits(addr)) 237 printf("Error found for upper 32 bits\n"); 238 else 239 esdhc_write32(®s->dsaddr, lower_32_bits(addr)); 240 #else 241 esdhc_write32(®s->dsaddr, (u32)data->dest); 242 #endif 243 #endif 244 } else { 245 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO 246 flush_dcache_range((ulong)data->src, 247 (ulong)data->src+data->blocks 248 *data->blocksize); 249 #endif 250 if (wml_value > WML_WR_WML_MAX) 251 wml_value = WML_WR_WML_MAX_VAL; 252 if (priv->wp_enable) { 253 if ((esdhc_read32(®s->prsstat) & 254 PRSSTAT_WPSPL) == 0) { 255 printf("\nThe SD card is locked. Can not write to a locked card.\n\n"); 256 return -ETIMEDOUT; 257 } 258 } 259 260 esdhc_clrsetbits32(®s->wml, WML_WR_WML_MASK, 261 wml_value << 16); 262 #ifndef CONFIG_SYS_FSL_ESDHC_USE_PIO 263 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) 264 addr = virt_to_phys((void *)(data->src)); 265 if (upper_32_bits(addr)) 266 printf("Error found for upper 32 bits\n"); 267 else 268 esdhc_write32(®s->dsaddr, lower_32_bits(addr)); 269 #else 270 esdhc_write32(®s->dsaddr, (u32)data->src); 271 #endif 272 #endif 273 } 274 275 esdhc_write32(®s->blkattr, data->blocks << 16 | data->blocksize); 276 277 /* Calculate the timeout period for data transactions */ 278 /* 279 * 1)Timeout period = (2^(timeout+13)) SD Clock cycles 280 * 2)Timeout period should be minimum 0.250sec as per SD Card spec 281 * So, Number of SD Clock cycles for 0.25sec should be minimum 282 * (SD Clock/sec * 0.25 sec) SD Clock cycles 283 * = (mmc->clock * 1/4) SD Clock cycles 284 * As 1) >= 2) 285 * => (2^(timeout+13)) >= mmc->clock * 1/4 286 * Taking log2 both the sides 287 * => timeout + 13 >= log2(mmc->clock/4) 288 * Rounding up to next power of 2 289 * => timeout + 13 = log2(mmc->clock/4) + 1 290 * => timeout + 13 = fls(mmc->clock/4) 291 * 292 * However, the MMC spec "It is strongly recommended for hosts to 293 * implement more than 500ms timeout value even if the card 294 * indicates the 250ms maximum busy length." Even the previous 295 * value of 300ms is known to be insufficient for some cards. 296 * So, we use 297 * => timeout + 13 = fls(mmc->clock/2) 298 */ 299 timeout = fls(mmc->clock/2); 300 timeout -= 13; 301 302 if (timeout > 14) 303 timeout = 14; 304 305 if (timeout < 0) 306 timeout = 0; 307 308 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001 309 if ((timeout == 4) || (timeout == 8) || (timeout == 12)) 310 timeout++; 311 #endif 312 313 #ifdef ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE 314 timeout = 0xE; 315 #endif 316 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16); 317 318 return 0; 319 } 320 321 static void check_and_invalidate_dcache_range 322 (struct mmc_cmd *cmd, 323 struct mmc_data *data) { 324 unsigned start = 0; 325 unsigned end = 0; 326 unsigned size = roundup(ARCH_DMA_MINALIGN, 327 data->blocks*data->blocksize); 328 #if defined(CONFIG_FSL_LAYERSCAPE) || defined(CONFIG_S32V234) 329 dma_addr_t addr; 330 331 addr = virt_to_phys((void *)(data->dest)); 332 if (upper_32_bits(addr)) 333 printf("Error found for upper 32 bits\n"); 334 else 335 start = lower_32_bits(addr); 336 #else 337 start = (unsigned)data->dest; 338 #endif 339 end = start + size; 340 invalidate_dcache_range(start, end); 341 } 342 343 /* 344 * Sends a command out on the bus. Takes the mmc pointer, 345 * a command pointer, and an optional data pointer. 346 */ 347 static int 348 esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) 349 { 350 int err = 0; 351 uint xfertyp; 352 uint irqstat; 353 struct fsl_esdhc_priv *priv = mmc->priv; 354 struct fsl_esdhc *regs = priv->esdhc_regs; 355 356 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111 357 if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION) 358 return 0; 359 #endif 360 361 esdhc_write32(®s->irqstat, -1); 362 363 sync(); 364 365 /* Wait for the bus to be idle */ 366 while ((esdhc_read32(®s->prsstat) & PRSSTAT_CICHB) || 367 (esdhc_read32(®s->prsstat) & PRSSTAT_CIDHB)) 368 ; 369 370 while (esdhc_read32(®s->prsstat) & PRSSTAT_DLA) 371 ; 372 373 /* Wait at least 8 SD clock cycles before the next command */ 374 /* 375 * Note: This is way more than 8 cycles, but 1ms seems to 376 * resolve timing issues with some cards 377 */ 378 udelay(1000); 379 380 /* Set up for a data transfer if we have one */ 381 if (data) { 382 err = esdhc_setup_data(mmc, data); 383 if(err) 384 return err; 385 386 if (data->flags & MMC_DATA_READ) 387 check_and_invalidate_dcache_range(cmd, data); 388 } 389 390 /* Figure out the transfer arguments */ 391 xfertyp = esdhc_xfertyp(cmd, data); 392 393 /* Mask all irqs */ 394 esdhc_write32(®s->irqsigen, 0); 395 396 /* Send the command */ 397 esdhc_write32(®s->cmdarg, cmd->cmdarg); 398 #if defined(CONFIG_FSL_USDHC) 399 esdhc_write32(®s->mixctrl, 400 (esdhc_read32(®s->mixctrl) & 0xFFFFFF80) | (xfertyp & 0x7F) 401 | (mmc->ddr_mode ? XFERTYP_DDREN : 0)); 402 esdhc_write32(®s->xfertyp, xfertyp & 0xFFFF0000); 403 #else 404 esdhc_write32(®s->xfertyp, xfertyp); 405 #endif 406 407 /* Wait for the command to complete */ 408 while (!(esdhc_read32(®s->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE))) 409 ; 410 411 irqstat = esdhc_read32(®s->irqstat); 412 413 if (irqstat & CMD_ERR) { 414 err = -ECOMM; 415 goto out; 416 } 417 418 if (irqstat & IRQSTAT_CTOE) { 419 err = -ETIMEDOUT; 420 goto out; 421 } 422 423 /* Switch voltage to 1.8V if CMD11 succeeded */ 424 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) { 425 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT); 426 427 printf("Run CMD11 1.8V switch\n"); 428 /* Sleep for 5 ms - max time for card to switch to 1.8V */ 429 udelay(5000); 430 } 431 432 /* Workaround for ESDHC errata ENGcm03648 */ 433 if (!data && (cmd->resp_type & MMC_RSP_BUSY)) { 434 int timeout = 6000; 435 436 /* Poll on DATA0 line for cmd with busy signal for 600 ms */ 437 while (timeout > 0 && !(esdhc_read32(®s->prsstat) & 438 PRSSTAT_DAT0)) { 439 udelay(100); 440 timeout--; 441 } 442 443 if (timeout <= 0) { 444 printf("Timeout waiting for DAT0 to go high!\n"); 445 err = -ETIMEDOUT; 446 goto out; 447 } 448 } 449 450 /* Copy the response to the response buffer */ 451 if (cmd->resp_type & MMC_RSP_136) { 452 u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0; 453 454 cmdrsp3 = esdhc_read32(®s->cmdrsp3); 455 cmdrsp2 = esdhc_read32(®s->cmdrsp2); 456 cmdrsp1 = esdhc_read32(®s->cmdrsp1); 457 cmdrsp0 = esdhc_read32(®s->cmdrsp0); 458 cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24); 459 cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24); 460 cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24); 461 cmd->response[3] = (cmdrsp0 << 8); 462 } else 463 cmd->response[0] = esdhc_read32(®s->cmdrsp0); 464 465 /* Wait until all of the blocks are transferred */ 466 if (data) { 467 #ifdef CONFIG_SYS_FSL_ESDHC_USE_PIO 468 esdhc_pio_read_write(mmc, data); 469 #else 470 do { 471 irqstat = esdhc_read32(®s->irqstat); 472 473 if (irqstat & IRQSTAT_DTOE) { 474 err = -ETIMEDOUT; 475 goto out; 476 } 477 478 if (irqstat & DATA_ERR) { 479 err = -ECOMM; 480 goto out; 481 } 482 } while ((irqstat & DATA_COMPLETE) != DATA_COMPLETE); 483 484 /* 485 * Need invalidate the dcache here again to avoid any 486 * cache-fill during the DMA operations such as the 487 * speculative pre-fetching etc. 488 */ 489 if (data->flags & MMC_DATA_READ) 490 check_and_invalidate_dcache_range(cmd, data); 491 #endif 492 } 493 494 out: 495 /* Reset CMD and DATA portions on error */ 496 if (err) { 497 esdhc_write32(®s->sysctl, esdhc_read32(®s->sysctl) | 498 SYSCTL_RSTC); 499 while (esdhc_read32(®s->sysctl) & SYSCTL_RSTC) 500 ; 501 502 if (data) { 503 esdhc_write32(®s->sysctl, 504 esdhc_read32(®s->sysctl) | 505 SYSCTL_RSTD); 506 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTD)) 507 ; 508 } 509 510 /* If this was CMD11, then notify that power cycle is needed */ 511 if (cmd->cmdidx == SD_CMD_SWITCH_UHS18V) 512 printf("CMD11 to switch to 1.8V mode failed, card requires power cycle.\n"); 513 } 514 515 esdhc_write32(®s->irqstat, -1); 516 517 return err; 518 } 519 520 static void set_sysctl(struct mmc *mmc, uint clock) 521 { 522 int div, pre_div; 523 struct fsl_esdhc_priv *priv = mmc->priv; 524 struct fsl_esdhc *regs = priv->esdhc_regs; 525 int sdhc_clk = priv->sdhc_clk; 526 uint clk; 527 528 if (clock < mmc->cfg->f_min) 529 clock = mmc->cfg->f_min; 530 531 if (sdhc_clk / 16 > clock) { 532 for (pre_div = 2; pre_div < 256; pre_div *= 2) 533 if ((sdhc_clk / pre_div) <= (clock * 16)) 534 break; 535 } else 536 pre_div = 2; 537 538 for (div = 1; div <= 16; div++) 539 if ((sdhc_clk / (div * pre_div)) <= clock) 540 break; 541 542 pre_div >>= mmc->ddr_mode ? 2 : 1; 543 div -= 1; 544 545 clk = (pre_div << 8) | (div << 4); 546 547 #ifdef CONFIG_FSL_USDHC 548 esdhc_clrbits32(®s->vendorspec, VENDORSPEC_CKEN); 549 #else 550 esdhc_clrbits32(®s->sysctl, SYSCTL_CKEN); 551 #endif 552 553 esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk); 554 555 udelay(10000); 556 557 #ifdef CONFIG_FSL_USDHC 558 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN); 559 #else 560 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_CKEN); 561 #endif 562 563 } 564 565 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK 566 static void esdhc_clock_control(struct mmc *mmc, bool enable) 567 { 568 struct fsl_esdhc_priv *priv = mmc->priv; 569 struct fsl_esdhc *regs = priv->esdhc_regs; 570 u32 value; 571 u32 time_out; 572 573 value = esdhc_read32(®s->sysctl); 574 575 if (enable) 576 value |= SYSCTL_CKEN; 577 else 578 value &= ~SYSCTL_CKEN; 579 580 esdhc_write32(®s->sysctl, value); 581 582 time_out = 20; 583 value = PRSSTAT_SDSTB; 584 while (!(esdhc_read32(®s->prsstat) & value)) { 585 if (time_out == 0) { 586 printf("fsl_esdhc: Internal clock never stabilised.\n"); 587 break; 588 } 589 time_out--; 590 mdelay(1); 591 } 592 } 593 #endif 594 595 static void esdhc_set_ios(struct mmc *mmc) 596 { 597 struct fsl_esdhc_priv *priv = mmc->priv; 598 struct fsl_esdhc *regs = priv->esdhc_regs; 599 600 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK 601 /* Select to use peripheral clock */ 602 esdhc_clock_control(mmc, false); 603 esdhc_setbits32(®s->scr, ESDHCCTL_PCS); 604 esdhc_clock_control(mmc, true); 605 #endif 606 /* Set the clock speed */ 607 set_sysctl(mmc, mmc->clock); 608 609 /* Set the bus width */ 610 esdhc_clrbits32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8); 611 612 if (mmc->bus_width == 4) 613 esdhc_setbits32(®s->proctl, PROCTL_DTW_4); 614 else if (mmc->bus_width == 8) 615 esdhc_setbits32(®s->proctl, PROCTL_DTW_8); 616 617 } 618 619 static int esdhc_init(struct mmc *mmc) 620 { 621 struct fsl_esdhc_priv *priv = mmc->priv; 622 struct fsl_esdhc *regs = priv->esdhc_regs; 623 int timeout = 1000; 624 625 /* Reset the entire host controller */ 626 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA); 627 628 /* Wait until the controller is available */ 629 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout) 630 udelay(1000); 631 632 #if defined(CONFIG_FSL_USDHC) 633 /* RSTA doesn't reset MMC_BOOT register, so manually reset it */ 634 esdhc_write32(®s->mmcboot, 0x0); 635 /* Reset MIX_CTRL and CLK_TUNE_CTRL_STATUS regs to 0 */ 636 esdhc_write32(®s->mixctrl, 0x0); 637 esdhc_write32(®s->clktunectrlstatus, 0x0); 638 639 /* Put VEND_SPEC to default value */ 640 esdhc_write32(®s->vendorspec, VENDORSPEC_INIT); 641 642 /* Disable DLL_CTRL delay line */ 643 esdhc_write32(®s->dllctrl, 0x0); 644 #endif 645 646 #ifndef ARCH_MXC 647 /* Enable cache snooping */ 648 esdhc_write32(®s->scr, 0x00000040); 649 #endif 650 651 #ifndef CONFIG_FSL_USDHC 652 esdhc_setbits32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN); 653 #else 654 esdhc_setbits32(®s->vendorspec, VENDORSPEC_HCKEN | VENDORSPEC_IPGEN); 655 #endif 656 657 /* Set the initial clock speed */ 658 mmc_set_clock(mmc, 400000); 659 660 /* Disable the BRR and BWR bits in IRQSTAT */ 661 esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR); 662 663 /* Put the PROCTL reg back to the default */ 664 esdhc_write32(®s->proctl, PROCTL_INIT); 665 666 /* Set timout to the maximum value */ 667 esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16); 668 669 #ifdef CONFIG_SYS_FSL_ESDHC_FORCE_VSELECT 670 esdhc_setbits32(®s->vendorspec, ESDHC_VENDORSPEC_VSELECT); 671 #endif 672 673 return 0; 674 } 675 676 static int esdhc_getcd(struct mmc *mmc) 677 { 678 struct fsl_esdhc_priv *priv = mmc->priv; 679 struct fsl_esdhc *regs = priv->esdhc_regs; 680 int timeout = 1000; 681 682 #ifdef CONFIG_ESDHC_DETECT_QUIRK 683 if (CONFIG_ESDHC_DETECT_QUIRK) 684 return 1; 685 #endif 686 687 #ifdef CONFIG_DM_MMC 688 if (priv->non_removable) 689 return 1; 690 691 if (dm_gpio_is_valid(&priv->cd_gpio)) 692 return dm_gpio_get_value(&priv->cd_gpio); 693 #endif 694 695 while (!(esdhc_read32(®s->prsstat) & PRSSTAT_CINS) && --timeout) 696 udelay(1000); 697 698 return timeout > 0; 699 } 700 701 static void esdhc_reset(struct fsl_esdhc *regs) 702 { 703 unsigned long timeout = 100; /* wait max 100 ms */ 704 705 /* reset the controller */ 706 esdhc_setbits32(®s->sysctl, SYSCTL_RSTA); 707 708 /* hardware clears the bit when it is done */ 709 while ((esdhc_read32(®s->sysctl) & SYSCTL_RSTA) && --timeout) 710 udelay(1000); 711 if (!timeout) 712 printf("MMC/SD: Reset never completed.\n"); 713 } 714 715 static const struct mmc_ops esdhc_ops = { 716 .send_cmd = esdhc_send_cmd, 717 .set_ios = esdhc_set_ios, 718 .init = esdhc_init, 719 .getcd = esdhc_getcd, 720 }; 721 722 static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg, 723 struct fsl_esdhc_priv *priv) 724 { 725 if (!cfg || !priv) 726 return -EINVAL; 727 728 priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base); 729 priv->bus_width = cfg->max_bus_width; 730 priv->sdhc_clk = cfg->sdhc_clk; 731 priv->wp_enable = cfg->wp_enable; 732 733 return 0; 734 }; 735 736 static int fsl_esdhc_init(struct fsl_esdhc_priv *priv) 737 { 738 struct fsl_esdhc *regs; 739 struct mmc *mmc; 740 u32 caps, voltage_caps; 741 742 if (!priv) 743 return -EINVAL; 744 745 regs = priv->esdhc_regs; 746 747 /* First reset the eSDHC controller */ 748 esdhc_reset(regs); 749 750 #ifndef CONFIG_FSL_USDHC 751 esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN 752 | SYSCTL_IPGEN | SYSCTL_CKEN); 753 #else 754 esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | 755 VENDORSPEC_HCKEN | VENDORSPEC_IPGEN | VENDORSPEC_CKEN); 756 #endif 757 758 writel(SDHCI_IRQ_EN_BITS, ®s->irqstaten); 759 memset(&priv->cfg, 0, sizeof(priv->cfg)); 760 761 voltage_caps = 0; 762 caps = esdhc_read32(®s->hostcapblt); 763 764 #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135 765 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS | 766 ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30); 767 #endif 768 769 /* T4240 host controller capabilities register should have VS33 bit */ 770 #ifdef CONFIG_SYS_FSL_MMC_HAS_CAPBLT_VS33 771 caps = caps | ESDHC_HOSTCAPBLT_VS33; 772 #endif 773 774 if (caps & ESDHC_HOSTCAPBLT_VS18) 775 voltage_caps |= MMC_VDD_165_195; 776 if (caps & ESDHC_HOSTCAPBLT_VS30) 777 voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31; 778 if (caps & ESDHC_HOSTCAPBLT_VS33) 779 voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34; 780 781 priv->cfg.name = "FSL_SDHC"; 782 priv->cfg.ops = &esdhc_ops; 783 #ifdef CONFIG_SYS_SD_VOLTAGE 784 priv->cfg.voltages = CONFIG_SYS_SD_VOLTAGE; 785 #else 786 priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34; 787 #endif 788 if ((priv->cfg.voltages & voltage_caps) == 0) { 789 printf("voltage not supported by controller\n"); 790 return -1; 791 } 792 793 if (priv->bus_width == 8) 794 priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; 795 else if (priv->bus_width == 4) 796 priv->cfg.host_caps = MMC_MODE_4BIT; 797 798 priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; 799 #ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE 800 priv->cfg.host_caps |= MMC_MODE_DDR_52MHz; 801 #endif 802 803 if (priv->bus_width > 0) { 804 if (priv->bus_width < 8) 805 priv->cfg.host_caps &= ~MMC_MODE_8BIT; 806 if (priv->bus_width < 4) 807 priv->cfg.host_caps &= ~MMC_MODE_4BIT; 808 } 809 810 if (caps & ESDHC_HOSTCAPBLT_HSS) 811 priv->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; 812 813 #ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK 814 if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK) 815 priv->cfg.host_caps &= ~MMC_MODE_8BIT; 816 #endif 817 818 priv->cfg.f_min = 400000; 819 priv->cfg.f_max = min(priv->sdhc_clk, (u32)52000000); 820 821 priv->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; 822 823 mmc = mmc_create(&priv->cfg, priv); 824 if (mmc == NULL) 825 return -1; 826 827 priv->mmc = mmc; 828 829 return 0; 830 } 831 832 int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) 833 { 834 struct fsl_esdhc_priv *priv; 835 int ret; 836 837 if (!cfg) 838 return -EINVAL; 839 840 priv = calloc(sizeof(struct fsl_esdhc_priv), 1); 841 if (!priv) 842 return -ENOMEM; 843 844 ret = fsl_esdhc_cfg_to_priv(cfg, priv); 845 if (ret) { 846 debug("%s xlate failure\n", __func__); 847 free(priv); 848 return ret; 849 } 850 851 ret = fsl_esdhc_init(priv); 852 if (ret) { 853 debug("%s init failure\n", __func__); 854 free(priv); 855 return ret; 856 } 857 858 return 0; 859 } 860 861 int fsl_esdhc_mmc_init(bd_t *bis) 862 { 863 struct fsl_esdhc_cfg *cfg; 864 865 cfg = calloc(sizeof(struct fsl_esdhc_cfg), 1); 866 cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR; 867 cfg->sdhc_clk = gd->arch.sdhc_clk; 868 return fsl_esdhc_initialize(bis, cfg); 869 } 870 871 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT 872 void mmc_adapter_card_type_ident(void) 873 { 874 u8 card_id; 875 u8 value; 876 877 card_id = QIXIS_READ(present) & QIXIS_SDID_MASK; 878 gd->arch.sdhc_adapter = card_id; 879 880 switch (card_id) { 881 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC45: 882 value = QIXIS_READ(brdcfg[5]); 883 value |= (QIXIS_DAT4 | QIXIS_DAT5_6_7); 884 QIXIS_WRITE(brdcfg[5], value); 885 break; 886 case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY: 887 value = QIXIS_READ(pwr_ctl[1]); 888 value |= QIXIS_EVDD_BY_SDHC_VS; 889 QIXIS_WRITE(pwr_ctl[1], value); 890 break; 891 case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44: 892 value = QIXIS_READ(brdcfg[5]); 893 value |= (QIXIS_SDCLKIN | QIXIS_SDCLKOUT); 894 QIXIS_WRITE(brdcfg[5], value); 895 break; 896 case QIXIS_ESDHC_ADAPTER_TYPE_RSV: 897 break; 898 case QIXIS_ESDHC_ADAPTER_TYPE_MMC: 899 break; 900 case QIXIS_ESDHC_ADAPTER_TYPE_SD: 901 break; 902 case QIXIS_ESDHC_NO_ADAPTER: 903 break; 904 default: 905 break; 906 } 907 } 908 #endif 909 910 #ifdef CONFIG_OF_LIBFDT 911 void fdt_fixup_esdhc(void *blob, bd_t *bd) 912 { 913 const char *compat = "fsl,esdhc"; 914 915 #ifdef CONFIG_FSL_ESDHC_PIN_MUX 916 if (!hwconfig("esdhc")) { 917 do_fixup_by_compat(blob, compat, "status", "disabled", 918 8 + 1, 1); 919 return; 920 } 921 #endif 922 923 #ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK 924 do_fixup_by_compat_u32(blob, compat, "peripheral-frequency", 925 gd->arch.sdhc_clk, 1); 926 #else 927 do_fixup_by_compat_u32(blob, compat, "clock-frequency", 928 gd->arch.sdhc_clk, 1); 929 #endif 930 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT 931 do_fixup_by_compat_u32(blob, compat, "adapter-type", 932 (u32)(gd->arch.sdhc_adapter), 1); 933 #endif 934 do_fixup_by_compat(blob, compat, "status", "okay", 935 4 + 1, 1); 936 } 937 #endif 938 939 #ifdef CONFIG_DM_MMC 940 #include <asm/arch/clock.h> 941 static int fsl_esdhc_probe(struct udevice *dev) 942 { 943 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 944 struct fsl_esdhc_priv *priv = dev_get_priv(dev); 945 const void *fdt = gd->fdt_blob; 946 int node = dev->of_offset; 947 fdt_addr_t addr; 948 unsigned int val; 949 int ret; 950 951 addr = dev_get_addr(dev); 952 if (addr == FDT_ADDR_T_NONE) 953 return -EINVAL; 954 955 priv->esdhc_regs = (struct fsl_esdhc *)addr; 956 priv->dev = dev; 957 958 val = fdtdec_get_int(fdt, node, "bus-width", -1); 959 if (val == 8) 960 priv->bus_width = 8; 961 else if (val == 4) 962 priv->bus_width = 4; 963 else 964 priv->bus_width = 1; 965 966 if (fdt_get_property(fdt, node, "non-removable", NULL)) { 967 priv->non_removable = 1; 968 } else { 969 priv->non_removable = 0; 970 gpio_request_by_name_nodev(fdt, node, "cd-gpios", 0, 971 &priv->cd_gpio, GPIOD_IS_IN); 972 } 973 974 priv->wp_enable = 1; 975 976 ret = gpio_request_by_name_nodev(fdt, node, "wp-gpios", 0, 977 &priv->wp_gpio, GPIOD_IS_IN); 978 if (ret) 979 priv->wp_enable = 0; 980 981 /* 982 * TODO: 983 * Because lack of clk driver, if SDHC clk is not enabled, 984 * need to enable it first before this driver is invoked. 985 * 986 * we use MXC_ESDHC_CLK to get clk freq. 987 * If one would like to make this function work, 988 * the aliases should be provided in dts as this: 989 * 990 * aliases { 991 * mmc0 = &usdhc1; 992 * mmc1 = &usdhc2; 993 * mmc2 = &usdhc3; 994 * mmc3 = &usdhc4; 995 * }; 996 * Then if your board only supports mmc2 and mmc3, but we can 997 * correctly get the seq as 2 and 3, then let mxc_get_clock 998 * work as expected. 999 */ 1000 priv->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK + dev->seq); 1001 if (priv->sdhc_clk <= 0) { 1002 dev_err(dev, "Unable to get clk for %s\n", dev->name); 1003 return -EINVAL; 1004 } 1005 1006 ret = fsl_esdhc_init(priv); 1007 if (ret) { 1008 dev_err(dev, "fsl_esdhc_init failure\n"); 1009 return ret; 1010 } 1011 1012 upriv->mmc = priv->mmc; 1013 priv->mmc->dev = dev; 1014 1015 return 0; 1016 } 1017 1018 static const struct udevice_id fsl_esdhc_ids[] = { 1019 { .compatible = "fsl,imx6ul-usdhc", }, 1020 { .compatible = "fsl,imx6sx-usdhc", }, 1021 { .compatible = "fsl,imx6sl-usdhc", }, 1022 { .compatible = "fsl,imx6q-usdhc", }, 1023 { .compatible = "fsl,imx7d-usdhc", }, 1024 { /* sentinel */ } 1025 }; 1026 1027 U_BOOT_DRIVER(fsl_esdhc) = { 1028 .name = "fsl-esdhc-mmc", 1029 .id = UCLASS_MMC, 1030 .of_match = fsl_esdhc_ids, 1031 .probe = fsl_esdhc_probe, 1032 .priv_auto_alloc_size = sizeof(struct fsl_esdhc_priv), 1033 }; 1034 #endif 1035