drivers/mmc/dw_mmc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2012 SAMSUNG Electronics
   4  * Jaehoon Chung <jh80.chung@samsung.com>
   5  * Rajeshawari Shinde <rajeshwari.s@samsung.com>
   6  */
   7
   8 #include <bouncebuf.h>
   9 #include <common.h>
  10 #include <cpu_func.h>
  11 #include <errno.h>
  12 #include <malloc.h>
  13 #include <memalign.h>
  14 #include <mmc.h>
  15 #include <dwmmc.h>
  16 #include <wait_bit.h>
  17 #include <asm/cache.h>
  18 #include <power/regulator.h>
  19
  20 #define PAGE_SIZE 4096
  21
  22 static int dwmci_wait_reset(struct dwmci_host *host, u32 value)
  23 {
  24         unsigned long timeout = 1000;
  25         u32 ctrl;
  26
  27         dwmci_writel(host, DWMCI_CTRL, value);
  28
  29         while (timeout--) {
  30                 ctrl = dwmci_readl(host, DWMCI_CTRL);
  31                 if (!(ctrl & DWMCI_RESET_ALL))
  32                         return 1;
  33         }
  34         return 0;
  35 }
  36
  37 static void dwmci_set_idma_desc(struct dwmci_idmac *idmac,
  38                 u32 desc0, u32 desc1, u32 desc2)
  39 {
  40         struct dwmci_idmac *desc = idmac;
  41
  42         desc->flags = desc0;
  43         desc->cnt = desc1;
  44         desc->addr = desc2;
  45         desc->next_addr = (ulong)desc + sizeof(struct dwmci_idmac);
  46 }
  47
  48 static void dwmci_prepare_data(struct dwmci_host *host,
  49                                struct mmc_data *data,
  50                                struct dwmci_idmac *cur_idmac,
  51                                void *bounce_buffer)
  52 {
  53         unsigned long ctrl;
  54         unsigned int i = 0, flags, cnt, blk_cnt;
  55         ulong data_start, data_end;
  56
  57
  58         blk_cnt = data->blocks;
  59
  60         dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
  61
  62         /* Clear IDMAC interrupt */
  63         dwmci_writel(host, DWMCI_IDSTS, 0xFFFFFFFF);
  64
  65         data_start = (ulong)cur_idmac;
  66         dwmci_writel(host, DWMCI_DBADDR, (ulong)cur_idmac);
  67
  68         do {
  69                 flags = DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH ;
  70                 flags |= (i == 0) ? DWMCI_IDMAC_FS : 0;
  71                 if (blk_cnt <= 8) {
  72                         flags |= DWMCI_IDMAC_LD;
  73                         cnt = data->blocksize * blk_cnt;
  74                 } else
  75                         cnt = data->blocksize * 8;
  76
  77                 dwmci_set_idma_desc(cur_idmac, flags, cnt,
  78                                     (ulong)bounce_buffer + (i * PAGE_SIZE));
  79
  80                 cur_idmac++;
  81                 if (blk_cnt <= 8)
  82                         break;
  83                 blk_cnt -= 8;
  84                 i++;
  85         } while(1);
  86
  87         data_end = (ulong)cur_idmac;
  88         flush_dcache_range(data_start, roundup(data_end, ARCH_DMA_MINALIGN));
  89
  90         ctrl = dwmci_readl(host, DWMCI_CTRL);
  91         ctrl |= DWMCI_IDMAC_EN | DWMCI_DMA_EN;
  92         dwmci_writel(host, DWMCI_CTRL, ctrl);
  93
  94         ctrl = dwmci_readl(host, DWMCI_BMOD);
  95         ctrl |= DWMCI_BMOD_IDMAC_FB | DWMCI_BMOD_IDMAC_EN;
  96         dwmci_writel(host, DWMCI_BMOD, ctrl);
  97
  98         dwmci_writel(host, DWMCI_BLKSIZ, data->blocksize);
  99         dwmci_writel(host, DWMCI_BYTCNT, data->blocksize * data->blocks);
 100 }
 101
 102 static int dwmci_fifo_ready(struct dwmci_host *host, u32 bit, u32 *len)
 103 {
 104         u32 timeout = 20000;
 105
 106         *len = dwmci_readl(host, DWMCI_STATUS);
 107         while (--timeout && (*len & bit)) {
 108                 udelay(200);
 109                 *len = dwmci_readl(host, DWMCI_STATUS);
 110         }
 111
 112         if (!timeout) {
 113                 debug("%s: FIFO underflow timeout\n", __func__);
 114                 return -ETIMEDOUT;
 115         }
 116
 117         return 0;
 118 }
 119
 120 static unsigned int dwmci_get_timeout(struct mmc *mmc, const unsigned int size)
 121 {
 122         unsigned int timeout;
 123
 124         timeout = size * 8;     /* counting in bits */
 125         timeout *= 10;          /* wait 10 times as long */
 126         timeout /= mmc->clock;
 127         timeout /= mmc->bus_width;
 128         timeout /= mmc->ddr_mode ? 2 : 1;
 129         timeout *= 1000;        /* counting in msec */
 130         timeout = (timeout < 1000) ? 1000 : timeout;
 131
 132         return timeout;
 133 }
 134
 135 static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data)
 136 {
 137         struct mmc *mmc = host->mmc;
 138         int ret = 0;
 139         u32 timeout, mask, size, i, len = 0;
 140         u32 *buf = NULL;
 141         ulong start = get_timer(0);
 142         u32 fifo_depth = (((host->fifoth_val & RX_WMARK_MASK) >>
 143                             RX_WMARK_SHIFT) + 1) * 2;
 144
 145         size = data->blocksize * data->blocks;
 146         if (data->flags == MMC_DATA_READ)
 147                 buf = (unsigned int *)data->dest;
 148         else
 149                 buf = (unsigned int *)data->src;
 150
 151         timeout = dwmci_get_timeout(mmc, size);
 152
 153         size /= 4;
 154
 155         for (;;) {
 156                 mask = dwmci_readl(host, DWMCI_RINTSTS);
 157                 /* Error during data transfer. */
 158                 if (mask & (DWMCI_DATA_ERR | DWMCI_DATA_TOUT)) {
 159                         debug("%s: DATA ERROR!\n", __func__);
 160                         ret = -EINVAL;
 161                         break;
 162                 }
 163
 164                 if (host->fifo_mode && size) {
 165                         len = 0;
 166                         if (data->flags == MMC_DATA_READ &&
 167                             (mask & DWMCI_INTMSK_RXDR)) {
 168                                 while (size) {
 169                                         ret = dwmci_fifo_ready(host,
 170                                                         DWMCI_FIFO_EMPTY,
 171                                                         &len);
 172                                         if (ret < 0)
 173                                                 break;
 174
 175                                         len = (len >> DWMCI_FIFO_SHIFT) &
 176                                                     DWMCI_FIFO_MASK;
 177                                         len = min(size, len);
 178                                         for (i = 0; i < len; i++)
 179                                                 *buf++ =
 180                                                 dwmci_readl(host, DWMCI_DATA);
 181                                         size = size > len ? (size - len) : 0;
 182                                 }
 183                                 dwmci_writel(host, DWMCI_RINTSTS,
 184                                              DWMCI_INTMSK_RXDR);
 185                         } else if (data->flags == MMC_DATA_WRITE &&
 186                                    (mask & DWMCI_INTMSK_TXDR)) {
 187                                 while (size) {
 188                                         ret = dwmci_fifo_ready(host,
 189                                                         DWMCI_FIFO_FULL,
 190                                                         &len);
 191                                         if (ret < 0)
 192                                                 break;
 193
 194                                         len = fifo_depth - ((len >>
 195                                                    DWMCI_FIFO_SHIFT) &
 196                                                    DWMCI_FIFO_MASK);
 197                                         len = min(size, len);
 198                                         for (i = 0; i < len; i++)
 199                                                 dwmci_writel(host, DWMCI_DATA,
 200                                                              *buf++);
 201                                         size = size > len ? (size - len) : 0;
 202                                 }
 203                                 dwmci_writel(host, DWMCI_RINTSTS,
 204                                              DWMCI_INTMSK_TXDR);
 205                         }
 206                 }
 207
 208                 /* Data arrived correctly. */
 209                 if (mask & DWMCI_INTMSK_DTO) {
 210                         ret = 0;
 211                         break;
 212                 }
 213
 214                 /* Check for timeout. */
 215                 if (get_timer(start) > timeout) {
 216                         debug("%s: Timeout waiting for data!\n",
 217                               __func__);
 218                         ret = -ETIMEDOUT;
 219                         break;
 220                 }
 221         }
 222
 223         dwmci_writel(host, DWMCI_RINTSTS, mask);
 224
 225         return ret;
 226 }
 227
 228 static int dwmci_set_transfer_mode(struct dwmci_host *host,
 229                 struct mmc_data *data)
 230 {
 231         unsigned long mode;
 232
 233         mode = DWMCI_CMD_DATA_EXP;
 234         if (data->flags & MMC_DATA_WRITE)
 235                 mode |= DWMCI_CMD_RW;
 236
 237         return mode;
 238 }
 239
 240 #ifdef CONFIG_DM_MMC
 241 static int dwmci_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 242                    struct mmc_data *data)
 243 {
 244         struct mmc *mmc = mmc_get_mmc_dev(dev);
 245 #else
 246 static int dwmci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 247                 struct mmc_data *data)
 248 {
 249 #endif
 250         struct dwmci_host *host = mmc->priv;
 251         ALLOC_CACHE_ALIGN_BUFFER(struct dwmci_idmac, cur_idmac,
 252                                  data ? DIV_ROUND_UP(data->blocks, 8) : 0);
 253         int ret = 0, flags = 0, i;
 254         unsigned int timeout = 500;
 255         u32 retry = 100000;
 256         u32 mask, ctrl;
 257         ulong start = get_timer(0);
 258         struct bounce_buffer bbstate;
 259
 260         while (dwmci_readl(host, DWMCI_STATUS) & DWMCI_BUSY) {
 261                 if (get_timer(start) > timeout) {
 262                         debug("%s: Timeout on data busy\n", __func__);
 263                         return -ETIMEDOUT;
 264                 }
 265         }
 266
 267         dwmci_writel(host, DWMCI_RINTSTS, DWMCI_INTMSK_ALL);
 268
 269         if (data) {
 270                 if (host->fifo_mode) {
 271                         dwmci_writel(host, DWMCI_BLKSIZ, data->blocksize);
 272                         dwmci_writel(host, DWMCI_BYTCNT,
 273                                      data->blocksize * data->blocks);
 274                         dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
 275                 } else {
 276                         if (data->flags == MMC_DATA_READ) {
 277                                 ret = bounce_buffer_start(&bbstate,
 278                                                 (void*)data->dest,
 279                                                 data->blocksize *
 280                                                 data->blocks, GEN_BB_WRITE);
 281                         } else {
 282                                 ret = bounce_buffer_start(&bbstate,
 283                                                 (void*)data->src,
 284                                                 data->blocksize *
 285                                                 data->blocks, GEN_BB_READ);
 286                         }
 287
 288                         if (ret)
 289                                 return ret;
 290
 291                         dwmci_prepare_data(host, data, cur_idmac,
 292                                            bbstate.bounce_buffer);
 293                 }
 294         }
 295
 296         dwmci_writel(host, DWMCI_CMDARG, cmd->cmdarg);
 297
 298         if (data)
 299                 flags = dwmci_set_transfer_mode(host, data);
 300
 301         if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type & MMC_RSP_BUSY))
 302                 return -1;
 303
 304         if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
 305                 flags |= DWMCI_CMD_ABORT_STOP;
 306         else
 307                 flags |= DWMCI_CMD_PRV_DAT_WAIT;
 308
 309         if (cmd->resp_type & MMC_RSP_PRESENT) {
 310                 flags |= DWMCI_CMD_RESP_EXP;
 311                 if (cmd->resp_type & MMC_RSP_136)
 312                         flags |= DWMCI_CMD_RESP_LENGTH;
 313         }
 314
 315         if (cmd->resp_type & MMC_RSP_CRC)
 316                 flags |= DWMCI_CMD_CHECK_CRC;
 317
 318         flags |= (cmd->cmdidx | DWMCI_CMD_START | DWMCI_CMD_USE_HOLD_REG);
 319
 320         debug("Sending CMD%d\n",cmd->cmdidx);
 321
 322         dwmci_writel(host, DWMCI_CMD, flags);
 323
 324         for (i = 0; i < retry; i++) {
 325                 mask = dwmci_readl(host, DWMCI_RINTSTS);
 326                 if (mask & DWMCI_INTMSK_CDONE) {
 327                         if (!data)
 328                                 dwmci_writel(host, DWMCI_RINTSTS, mask);
 329                         break;
 330                 }
 331         }
 332
 333         if (i == retry) {
 334                 debug("%s: Timeout.\n", __func__);
 335                 return -ETIMEDOUT;
 336         }
 337
 338         if (mask & DWMCI_INTMSK_RTO) {
 339                 /*
 340                  * Timeout here is not necessarily fatal. (e)MMC cards
 341                  * will splat here when they receive CMD55 as they do
 342                  * not support this command and that is exactly the way
 343                  * to tell them apart from SD cards. Thus, this output
 344                  * below shall be debug(). eMMC cards also do not favor
 345                  * CMD8, please keep that in mind.
 346                  */
 347                 debug("%s: Response Timeout.\n", __func__);
 348                 return -ETIMEDOUT;
 349         } else if (mask & DWMCI_INTMSK_RE) {
 350                 debug("%s: Response Error.\n", __func__);
 351                 return -EIO;
 352         } else if ((cmd->resp_type & MMC_RSP_CRC) &&
 353                    (mask & DWMCI_INTMSK_RCRC)) {
 354                 debug("%s: Response CRC Error.\n", __func__);
 355                 return -EIO;
 356         }
 357
 358
 359         if (cmd->resp_type & MMC_RSP_PRESENT) {
 360                 if (cmd->resp_type & MMC_RSP_136) {
 361                         cmd->response[0] = dwmci_readl(host, DWMCI_RESP3);
 362                         cmd->response[1] = dwmci_readl(host, DWMCI_RESP2);
 363                         cmd->response[2] = dwmci_readl(host, DWMCI_RESP1);
 364                         cmd->response[3] = dwmci_readl(host, DWMCI_RESP0);
 365                 } else {
 366                         cmd->response[0] = dwmci_readl(host, DWMCI_RESP0);
 367                 }
 368         }
 369
 370         if (data) {
 371                 ret = dwmci_data_transfer(host, data);
 372
 373                 /* only dma mode need it */
 374                 if (!host->fifo_mode) {
 375                         if (data->flags == MMC_DATA_READ)
 376                                 mask = DWMCI_IDINTEN_RI;
 377                         else
 378                                 mask = DWMCI_IDINTEN_TI;
 379                         ret = wait_for_bit_le32(host->ioaddr + DWMCI_IDSTS,
 380                                                 mask, true, 1000, false);
 381                         if (ret)
 382                                 debug("%s: DWMCI_IDINTEN mask 0x%x timeout.\n",
 383                                       __func__, mask);
 384                         /* clear interrupts */
 385                         dwmci_writel(host, DWMCI_IDSTS, DWMCI_IDINTEN_MASK);
 386
 387                         ctrl = dwmci_readl(host, DWMCI_CTRL);
 388                         ctrl &= ~(DWMCI_DMA_EN);
 389                         dwmci_writel(host, DWMCI_CTRL, ctrl);
 390                         bounce_buffer_stop(&bbstate);
 391                 }
 392         }
 393
 394         udelay(100);
 395
 396         return ret;
 397 }
 398
 399 static int dwmci_setup_bus(struct dwmci_host *host, u32 freq)
 400 {
 401         u32 div, status;
 402         int timeout = 10000;
 403         unsigned long sclk;
 404
 405         if ((freq == host->clock) || (freq == 0))
 406                 return 0;
 407         /*
 408          * If host->get_mmc_clk isn't defined,
 409          * then assume that host->bus_hz is source clock value.
 410          * host->bus_hz should be set by user.
 411          */
 412         if (host->get_mmc_clk)
 413                 sclk = host->get_mmc_clk(host, freq);
 414         else if (host->bus_hz)
 415                 sclk = host->bus_hz;
 416         else {
 417                 debug("%s: Didn't get source clock value.\n", __func__);
 418                 return -EINVAL;
 419         }
 420
 421         if (sclk == freq)
 422                 div = 0;        /* bypass mode */
 423         else
 424                 div = DIV_ROUND_UP(sclk, 2 * freq);
 425
 426         dwmci_writel(host, DWMCI_CLKENA, 0);
 427         dwmci_writel(host, DWMCI_CLKSRC, 0);
 428
 429         dwmci_writel(host, DWMCI_CLKDIV, div);
 430         dwmci_writel(host, DWMCI_CMD, DWMCI_CMD_PRV_DAT_WAIT |
 431                         DWMCI_CMD_UPD_CLK | DWMCI_CMD_START);
 432
 433         do {
 434                 status = dwmci_readl(host, DWMCI_CMD);
 435                 if (timeout-- < 0) {
 436                         debug("%s: Timeout!\n", __func__);
 437                         return -ETIMEDOUT;
 438                 }
 439         } while (status & DWMCI_CMD_START);
 440
 441         dwmci_writel(host, DWMCI_CLKENA, DWMCI_CLKEN_ENABLE |
 442                         DWMCI_CLKEN_LOW_PWR);
 443
 444         dwmci_writel(host, DWMCI_CMD, DWMCI_CMD_PRV_DAT_WAIT |
 445                         DWMCI_CMD_UPD_CLK | DWMCI_CMD_START);
 446
 447         timeout = 10000;
 448         do {
 449                 status = dwmci_readl(host, DWMCI_CMD);
 450                 if (timeout-- < 0) {
 451                         debug("%s: Timeout!\n", __func__);
 452                         return -ETIMEDOUT;
 453                 }
 454         } while (status & DWMCI_CMD_START);
 455
 456         host->clock = freq;
 457
 458         return 0;
 459 }
 460
 461 #ifdef CONFIG_DM_MMC
 462 static int dwmci_set_ios(struct udevice *dev)
 463 {
 464         struct mmc *mmc = mmc_get_mmc_dev(dev);
 465 #else
 466 static int dwmci_set_ios(struct mmc *mmc)
 467 {
 468 #endif
 469         struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
 470         u32 ctype, regs;
 471
 472         debug("Buswidth = %d, clock: %d\n", mmc->bus_width, mmc->clock);
 473
 474         dwmci_setup_bus(host, mmc->clock);
 475         switch (mmc->bus_width) {
 476         case 8:
 477                 ctype = DWMCI_CTYPE_8BIT;
 478                 break;
 479         case 4:
 480                 ctype = DWMCI_CTYPE_4BIT;
 481                 break;
 482         default:
 483                 ctype = DWMCI_CTYPE_1BIT;
 484                 break;
 485         }
 486
 487         dwmci_writel(host, DWMCI_CTYPE, ctype);
 488
 489         regs = dwmci_readl(host, DWMCI_UHS_REG);
 490         if (mmc->ddr_mode)
 491                 regs |= DWMCI_DDR_MODE;
 492         else
 493                 regs &= ~DWMCI_DDR_MODE;
 494
 495         dwmci_writel(host, DWMCI_UHS_REG, regs);
 496
 497         if (host->clksel)
 498                 host->clksel(host);
 499
 500 #if CONFIG_IS_ENABLED(DM_REGULATOR)
 501         if (mmc->vqmmc_supply) {
 502                 int ret;
 503
 504                 if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
 505                         regulator_set_value(mmc->vqmmc_supply, 1800000);
 506                 else
 507                         regulator_set_value(mmc->vqmmc_supply, 3300000);
 508
 509                 ret = regulator_set_enable_if_allowed(mmc->vqmmc_supply, true);
 510                 if (ret)
 511                         return ret;
 512         }
 513 #endif
 514
 515         return 0;
 516 }
 517
 518 static int dwmci_init(struct mmc *mmc)
 519 {
 520         struct dwmci_host *host = mmc->priv;
 521
 522         if (host->board_init)
 523                 host->board_init(host);
 524
 525         dwmci_writel(host, DWMCI_PWREN, 1);
 526
 527         if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
 528                 debug("%s[%d] Fail-reset!!\n", __func__, __LINE__);
 529                 return -EIO;
 530         }
 531
 532         /* Enumerate at 400KHz */
 533         dwmci_setup_bus(host, mmc->cfg->f_min);
 534
 535         dwmci_writel(host, DWMCI_RINTSTS, 0xFFFFFFFF);
 536         dwmci_writel(host, DWMCI_INTMASK, 0);
 537
 538         dwmci_writel(host, DWMCI_TMOUT, 0xFFFFFFFF);
 539
 540         dwmci_writel(host, DWMCI_IDINTEN, 0);
 541         dwmci_writel(host, DWMCI_BMOD, 1);
 542
 543         if (!host->fifoth_val) {
 544                 uint32_t fifo_size;
 545
 546                 fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
 547                 fifo_size = ((fifo_size & RX_WMARK_MASK) >> RX_WMARK_SHIFT) + 1;
 548                 host->fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_size / 2 - 1) |
 549                                 TX_WMARK(fifo_size / 2);
 550         }
 551         dwmci_writel(host, DWMCI_FIFOTH, host->fifoth_val);
 552
 553         dwmci_writel(host, DWMCI_CLKENA, 0);
 554         dwmci_writel(host, DWMCI_CLKSRC, 0);
 555
 556         if (!host->fifo_mode)
 557                 dwmci_writel(host, DWMCI_IDINTEN, DWMCI_IDINTEN_MASK);
 558
 559         return 0;
 560 }
 561
 562 #ifdef CONFIG_DM_MMC
 563 int dwmci_probe(struct udevice *dev)
 564 {
 565         struct mmc *mmc = mmc_get_mmc_dev(dev);
 566
 567         return dwmci_init(mmc);
 568 }
 569
 570 const struct dm_mmc_ops dm_dwmci_ops = {
 571         .send_cmd       = dwmci_send_cmd,
 572         .set_ios        = dwmci_set_ios,
 573 };
 574
 575 #else
 576 static const struct mmc_ops dwmci_ops = {
 577         .send_cmd       = dwmci_send_cmd,
 578         .set_ios        = dwmci_set_ios,
 579         .init           = dwmci_init,
 580 };
 581 #endif
 582
 583 void dwmci_setup_cfg(struct mmc_config *cfg, struct dwmci_host *host,
 584                 u32 max_clk, u32 min_clk)
 585 {
 586         cfg->name = host->name;
 587 #ifndef CONFIG_DM_MMC
 588         cfg->ops = &dwmci_ops;
 589 #endif
 590         cfg->f_min = min_clk;
 591         cfg->f_max = max_clk;
 592
 593         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 594
 595         cfg->host_caps = host->caps;
 596
 597         if (host->buswidth == 8) {
 598                 cfg->host_caps |= MMC_MODE_8BIT;
 599                 cfg->host_caps &= ~MMC_MODE_4BIT;
 600         } else {
 601                 cfg->host_caps |= MMC_MODE_4BIT;
 602                 cfg->host_caps &= ~MMC_MODE_8BIT;
 603         }
 604         cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
 605
 606         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 607 }
 608
 609 #ifdef CONFIG_BLK
 610 int dwmci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg)
 611 {
 612         return mmc_bind(dev, mmc, cfg);
 613 }
 614 #else
 615 int add_dwmci(struct dwmci_host *host, u32 max_clk, u32 min_clk)
 616 {
 617         dwmci_setup_cfg(&host->cfg, host, max_clk, min_clk);
 618
 619         host->mmc = mmc_create(&host->cfg, host);
 620         if (host->mmc == NULL)
 621                 return -1;
 622
 623         return 0;
 624 }
 625 #endif