drivers/mmc/sh_mmcif.c

   1 /*
   2  * MMCIF driver.
   3  *
   4  * Copyright (C)  2011 Renesas Solutions Corp.
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0
   7  */
   8
   9 #include <config.h>
  10 #include <common.h>
  11 #include <watchdog.h>
  12 #include <command.h>
  13 #include <mmc.h>
  14 #include <malloc.h>
  15 #include <asm/errno.h>
  16 #include <asm/io.h>
  17 #include "sh_mmcif.h"
  18
  19 #define DRIVER_NAME     "sh_mmcif"
  20
  21 static int sh_mmcif_intr(void *dev_id)
  22 {
  23         struct sh_mmcif_host *host = dev_id;
  24         u32 state = 0;
  25
  26         state = sh_mmcif_read(&host->regs->ce_int);
  27         state &= sh_mmcif_read(&host->regs->ce_int_mask);
  28
  29         if (state & INT_RBSYE) {
  30                 sh_mmcif_write(~(INT_RBSYE | INT_CRSPE), &host->regs->ce_int);
  31                 sh_mmcif_bitclr(MASK_MRBSYE, &host->regs->ce_int_mask);
  32                 goto end;
  33         } else if (state & INT_CRSPE) {
  34                 sh_mmcif_write(~INT_CRSPE, &host->regs->ce_int);
  35                 sh_mmcif_bitclr(MASK_MCRSPE, &host->regs->ce_int_mask);
  36                 /* one more interrupt (INT_RBSYE) */
  37                 if (sh_mmcif_read(&host->regs->ce_cmd_set) & CMD_SET_RBSY)
  38                         return -EAGAIN;
  39                 goto end;
  40         } else if (state & INT_BUFREN) {
  41                 sh_mmcif_write(~INT_BUFREN, &host->regs->ce_int);
  42                 sh_mmcif_bitclr(MASK_MBUFREN, &host->regs->ce_int_mask);
  43                 goto end;
  44         } else if (state & INT_BUFWEN) {
  45                 sh_mmcif_write(~INT_BUFWEN, &host->regs->ce_int);
  46                 sh_mmcif_bitclr(MASK_MBUFWEN, &host->regs->ce_int_mask);
  47                 goto end;
  48         } else if (state & INT_CMD12DRE) {
  49                 sh_mmcif_write(~(INT_CMD12DRE | INT_CMD12RBE | INT_CMD12CRE |
  50                                   INT_BUFRE), &host->regs->ce_int);
  51                 sh_mmcif_bitclr(MASK_MCMD12DRE, &host->regs->ce_int_mask);
  52                 goto end;
  53         } else if (state & INT_BUFRE) {
  54                 sh_mmcif_write(~INT_BUFRE, &host->regs->ce_int);
  55                 sh_mmcif_bitclr(MASK_MBUFRE, &host->regs->ce_int_mask);
  56                 goto end;
  57         } else if (state & INT_DTRANE) {
  58                 sh_mmcif_write(~INT_DTRANE, &host->regs->ce_int);
  59                 sh_mmcif_bitclr(MASK_MDTRANE, &host->regs->ce_int_mask);
  60                 goto end;
  61         } else if (state & INT_CMD12RBE) {
  62                 sh_mmcif_write(~(INT_CMD12RBE | INT_CMD12CRE),
  63                                 &host->regs->ce_int);
  64                 sh_mmcif_bitclr(MASK_MCMD12RBE, &host->regs->ce_int_mask);
  65                 goto end;
  66         } else if (state & INT_ERR_STS) {
  67                 /* err interrupts */
  68                 sh_mmcif_write(~state, &host->regs->ce_int);
  69                 sh_mmcif_bitclr(state, &host->regs->ce_int_mask);
  70                 goto err;
  71         } else
  72                 return -EAGAIN;
  73
  74 err:
  75         host->sd_error = 1;
  76         debug("%s: int err state = %08x\n", DRIVER_NAME, state);
  77 end:
  78         host->wait_int = 1;
  79         return 0;
  80 }
  81
  82 static int mmcif_wait_interrupt_flag(struct sh_mmcif_host *host)
  83 {
  84         int timeout = 10000000;
  85
  86         while (1) {
  87                 timeout--;
  88                 if (timeout < 0) {
  89                         printf("timeout\n");
  90                         return 0;
  91                 }
  92
  93                 if (!sh_mmcif_intr(host))
  94                         break;
  95
  96                 udelay(1);      /* 1 usec */
  97         }
  98
  99         return 1;       /* Return value: NOT 0 = complete waiting */
 100 }
 101
 102 static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
 103 {
 104         sh_mmcif_bitclr(CLK_ENABLE, &host->regs->ce_clk_ctrl);
 105         sh_mmcif_bitclr(CLK_CLEAR, &host->regs->ce_clk_ctrl);
 106
 107         if (!clk)
 108                 return;
 109
 110         if (clk == CLKDEV_EMMC_DATA)
 111                 sh_mmcif_bitset(CLK_PCLK, &host->regs->ce_clk_ctrl);
 112         else
 113                 sh_mmcif_bitset((fls(DIV_ROUND_UP(host->clk,
 114                                                   clk) - 1) - 1) << 16,
 115                                 &host->regs->ce_clk_ctrl);
 116         sh_mmcif_bitset(CLK_ENABLE, &host->regs->ce_clk_ctrl);
 117 }
 118
 119 static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
 120 {
 121         u32 tmp;
 122
 123         tmp = sh_mmcif_read(&host->regs->ce_clk_ctrl) & (CLK_ENABLE |
 124                                                          CLK_CLEAR);
 125
 126         sh_mmcif_write(SOFT_RST_ON, &host->regs->ce_version);
 127         sh_mmcif_write(SOFT_RST_OFF, &host->regs->ce_version);
 128         sh_mmcif_bitset(tmp | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29,
 129                         &host->regs->ce_clk_ctrl);
 130         /* byte swap on */
 131         sh_mmcif_bitset(BUF_ACC_ATYP, &host->regs->ce_buf_acc);
 132 }
 133
 134 static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
 135 {
 136         u32 state1, state2;
 137         int ret, timeout = 10000000;
 138
 139         host->sd_error = 0;
 140         host->wait_int = 0;
 141
 142         state1 = sh_mmcif_read(&host->regs->ce_host_sts1);
 143         state2 = sh_mmcif_read(&host->regs->ce_host_sts2);
 144         debug("%s: ERR HOST_STS1 = %08x\n", \
 145                         DRIVER_NAME, sh_mmcif_read(&host->regs->ce_host_sts1));
 146         debug("%s: ERR HOST_STS2 = %08x\n", \
 147                         DRIVER_NAME, sh_mmcif_read(&host->regs->ce_host_sts2));
 148
 149         if (state1 & STS1_CMDSEQ) {
 150                 debug("%s: Forced end of command sequence\n", DRIVER_NAME);
 151                 sh_mmcif_bitset(CMD_CTRL_BREAK, &host->regs->ce_cmd_ctrl);
 152                 sh_mmcif_bitset(~CMD_CTRL_BREAK, &host->regs->ce_cmd_ctrl);
 153                 while (1) {
 154                         timeout--;
 155                         if (timeout < 0) {
 156                                 printf(DRIVER_NAME": Forceed end of " \
 157                                         "command sequence timeout err\n");
 158                                 return -EILSEQ;
 159                         }
 160                         if (!(sh_mmcif_read(&host->regs->ce_host_sts1)
 161                                                                 & STS1_CMDSEQ))
 162                                 break;
 163                 }
 164                 sh_mmcif_sync_reset(host);
 165                 return -EILSEQ;
 166         }
 167
 168         if (state2 & STS2_CRC_ERR)
 169                 ret = -EILSEQ;
 170         else if (state2 & STS2_TIMEOUT_ERR)
 171                 ret = -ETIMEDOUT;
 172         else
 173                 ret = -EILSEQ;
 174         return ret;
 175 }
 176
 177 static int sh_mmcif_single_read(struct sh_mmcif_host *host,
 178                                 struct mmc_data *data)
 179 {
 180         long time;
 181         u32 blocksize, i;
 182         unsigned long *p = (unsigned long *)data->dest;
 183
 184         if ((unsigned long)p & 0x00000001) {
 185                 printf("%s: The data pointer is unaligned.", __func__);
 186                 return -EIO;
 187         }
 188
 189         host->wait_int = 0;
 190
 191         /* buf read enable */
 192         sh_mmcif_bitset(MASK_MBUFREN, &host->regs->ce_int_mask);
 193         time = mmcif_wait_interrupt_flag(host);
 194         if (time == 0 || host->sd_error != 0)
 195                 return sh_mmcif_error_manage(host);
 196
 197         host->wait_int = 0;
 198         blocksize = (BLOCK_SIZE_MASK &
 199                         sh_mmcif_read(&host->regs->ce_block_set)) + 3;
 200         for (i = 0; i < blocksize / 4; i++)
 201                 *p++ = sh_mmcif_read(&host->regs->ce_data);
 202
 203         /* buffer read end */
 204         sh_mmcif_bitset(MASK_MBUFRE, &host->regs->ce_int_mask);
 205         time = mmcif_wait_interrupt_flag(host);
 206         if (time == 0 || host->sd_error != 0)
 207                 return sh_mmcif_error_manage(host);
 208
 209         host->wait_int = 0;
 210         return 0;
 211 }
 212
 213 static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
 214                                 struct mmc_data *data)
 215 {
 216         long time;
 217         u32 blocksize, i, j;
 218         unsigned long *p = (unsigned long *)data->dest;
 219
 220         if ((unsigned long)p & 0x00000001) {
 221                 printf("%s: The data pointer is unaligned.", __func__);
 222                 return -EIO;
 223         }
 224
 225         host->wait_int = 0;
 226         blocksize = BLOCK_SIZE_MASK & sh_mmcif_read(&host->regs->ce_block_set);
 227         for (j = 0; j < data->blocks; j++) {
 228                 sh_mmcif_bitset(MASK_MBUFREN, &host->regs->ce_int_mask);
 229                 time = mmcif_wait_interrupt_flag(host);
 230                 if (time == 0 || host->sd_error != 0)
 231                         return sh_mmcif_error_manage(host);
 232
 233                 host->wait_int = 0;
 234                 for (i = 0; i < blocksize / 4; i++)
 235                         *p++ = sh_mmcif_read(&host->regs->ce_data);
 236
 237                 WATCHDOG_RESET();
 238         }
 239         return 0;
 240 }
 241
 242 static int sh_mmcif_single_write(struct sh_mmcif_host *host,
 243                                  struct mmc_data *data)
 244 {
 245         long time;
 246         u32 blocksize, i;
 247         const unsigned long *p = (unsigned long *)data->dest;
 248
 249         if ((unsigned long)p & 0x00000001) {
 250                 printf("%s: The data pointer is unaligned.", __func__);
 251                 return -EIO;
 252         }
 253
 254         host->wait_int = 0;
 255         sh_mmcif_bitset(MASK_MBUFWEN, &host->regs->ce_int_mask);
 256
 257         time = mmcif_wait_interrupt_flag(host);
 258         if (time == 0 || host->sd_error != 0)
 259                 return sh_mmcif_error_manage(host);
 260
 261         host->wait_int = 0;
 262         blocksize = (BLOCK_SIZE_MASK &
 263                         sh_mmcif_read(&host->regs->ce_block_set)) + 3;
 264         for (i = 0; i < blocksize / 4; i++)
 265                 sh_mmcif_write(*p++, &host->regs->ce_data);
 266
 267         /* buffer write end */
 268         sh_mmcif_bitset(MASK_MDTRANE, &host->regs->ce_int_mask);
 269
 270         time = mmcif_wait_interrupt_flag(host);
 271         if (time == 0 || host->sd_error != 0)
 272                 return sh_mmcif_error_manage(host);
 273
 274         host->wait_int = 0;
 275         return 0;
 276 }
 277
 278 static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
 279                                 struct mmc_data *data)
 280 {
 281         long time;
 282         u32 i, j, blocksize;
 283         const unsigned long *p = (unsigned long *)data->dest;
 284
 285         if ((unsigned long)p & 0x00000001) {
 286                 printf("%s: The data pointer is unaligned.", __func__);
 287                 return -EIO;
 288         }
 289
 290         host->wait_int = 0;
 291         blocksize = BLOCK_SIZE_MASK & sh_mmcif_read(&host->regs->ce_block_set);
 292         for (j = 0; j < data->blocks; j++) {
 293                 sh_mmcif_bitset(MASK_MBUFWEN, &host->regs->ce_int_mask);
 294
 295                 time = mmcif_wait_interrupt_flag(host);
 296
 297                 if (time == 0 || host->sd_error != 0)
 298                         return sh_mmcif_error_manage(host);
 299
 300                 host->wait_int = 0;
 301                 for (i = 0; i < blocksize / 4; i++)
 302                         sh_mmcif_write(*p++, &host->regs->ce_data);
 303
 304                 WATCHDOG_RESET();
 305         }
 306         return 0;
 307 }
 308
 309 static void sh_mmcif_get_response(struct sh_mmcif_host *host,
 310                                         struct mmc_cmd *cmd)
 311 {
 312         if (cmd->resp_type & MMC_RSP_136) {
 313                 cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp3);
 314                 cmd->response[1] = sh_mmcif_read(&host->regs->ce_resp2);
 315                 cmd->response[2] = sh_mmcif_read(&host->regs->ce_resp1);
 316                 cmd->response[3] = sh_mmcif_read(&host->regs->ce_resp0);
 317                 debug(" RESP %08x, %08x, %08x, %08x\n", cmd->response[0],
 318                          cmd->response[1], cmd->response[2], cmd->response[3]);
 319         } else {
 320                 cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp0);
 321         }
 322 }
 323
 324 static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
 325                                         struct mmc_cmd *cmd)
 326 {
 327         cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp_cmd12);
 328 }
 329
 330 static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 331                                 struct mmc_data *data, struct mmc_cmd *cmd)
 332 {
 333         u32 tmp = 0;
 334         u32 opc = cmd->cmdidx;
 335
 336         /* Response Type check */
 337         switch (cmd->resp_type) {
 338         case MMC_RSP_NONE:
 339                 tmp |= CMD_SET_RTYP_NO;
 340                 break;
 341         case MMC_RSP_R1:
 342         case MMC_RSP_R1b:
 343         case MMC_RSP_R3:
 344                 tmp |= CMD_SET_RTYP_6B;
 345                 break;
 346         case MMC_RSP_R2:
 347                 tmp |= CMD_SET_RTYP_17B;
 348                 break;
 349         default:
 350                 printf(DRIVER_NAME": Not support type response.\n");
 351                 break;
 352         }
 353
 354         /* RBSY */
 355         if (opc == MMC_CMD_SWITCH)
 356                 tmp |= CMD_SET_RBSY;
 357
 358         /* WDAT / DATW */
 359         if (host->data) {
 360                 tmp |= CMD_SET_WDAT;
 361                 switch (host->bus_width) {
 362                 case MMC_BUS_WIDTH_1:
 363                         tmp |= CMD_SET_DATW_1;
 364                         break;
 365                 case MMC_BUS_WIDTH_4:
 366                         tmp |= CMD_SET_DATW_4;
 367                         break;
 368                 case MMC_BUS_WIDTH_8:
 369                         tmp |= CMD_SET_DATW_8;
 370                         break;
 371                 default:
 372                         printf(DRIVER_NAME": Not support bus width.\n");
 373                         break;
 374                 }
 375         }
 376         /* DWEN */
 377         if (opc == MMC_CMD_WRITE_SINGLE_BLOCK ||
 378             opc == MMC_CMD_WRITE_MULTIPLE_BLOCK)
 379                 tmp |= CMD_SET_DWEN;
 380         /* CMLTE/CMD12EN */
 381         if (opc == MMC_CMD_READ_MULTIPLE_BLOCK ||
 382             opc == MMC_CMD_WRITE_MULTIPLE_BLOCK) {
 383                 tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
 384                 sh_mmcif_bitset(data->blocks << 16, &host->regs->ce_block_set);
 385         }
 386         /* RIDXC[1:0] check bits */
 387         if (opc == MMC_CMD_SEND_OP_COND || opc == MMC_CMD_ALL_SEND_CID ||
 388             opc == MMC_CMD_SEND_CSD || opc == MMC_CMD_SEND_CID)
 389                 tmp |= CMD_SET_RIDXC_BITS;
 390         /* RCRC7C[1:0] check bits */
 391         if (opc == MMC_CMD_SEND_OP_COND)
 392                 tmp |= CMD_SET_CRC7C_BITS;
 393         /* RCRC7C[1:0] internal CRC7 */
 394         if (opc == MMC_CMD_ALL_SEND_CID ||
 395                 opc == MMC_CMD_SEND_CSD || opc == MMC_CMD_SEND_CID)
 396                 tmp |= CMD_SET_CRC7C_INTERNAL;
 397
 398         return opc = ((opc << 24) | tmp);
 399 }
 400
 401 static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host,
 402                                 struct mmc_data *data, u16 opc)
 403 {
 404         u32 ret;
 405
 406         switch (opc) {
 407         case MMC_CMD_READ_MULTIPLE_BLOCK:
 408                 ret = sh_mmcif_multi_read(host, data);
 409                 break;
 410         case MMC_CMD_WRITE_MULTIPLE_BLOCK:
 411                 ret = sh_mmcif_multi_write(host, data);
 412                 break;
 413         case MMC_CMD_WRITE_SINGLE_BLOCK:
 414                 ret = sh_mmcif_single_write(host, data);
 415                 break;
 416         case MMC_CMD_READ_SINGLE_BLOCK:
 417         case MMC_CMD_SEND_EXT_CSD:
 418                 ret = sh_mmcif_single_read(host, data);
 419                 break;
 420         default:
 421                 printf(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc);
 422                 ret = -EINVAL;
 423                 break;
 424         }
 425         return ret;
 426 }
 427
 428 static int sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 429                                 struct mmc_data *data, struct mmc_cmd *cmd)
 430 {
 431         long time;
 432         int ret = 0, mask = 0;
 433         u32 opc = cmd->cmdidx;
 434
 435         if (opc == MMC_CMD_STOP_TRANSMISSION) {
 436                 /* MMCIF sends the STOP command automatically */
 437                 if (host->last_cmd == MMC_CMD_READ_MULTIPLE_BLOCK)
 438                         sh_mmcif_bitset(MASK_MCMD12DRE,
 439                                         &host->regs->ce_int_mask);
 440                 else
 441                         sh_mmcif_bitset(MASK_MCMD12RBE,
 442                                         &host->regs->ce_int_mask);
 443
 444                 time = mmcif_wait_interrupt_flag(host);
 445                 if (time == 0 || host->sd_error != 0)
 446                         return sh_mmcif_error_manage(host);
 447
 448                 sh_mmcif_get_cmd12response(host, cmd);
 449                 return 0;
 450         }
 451         if (opc == MMC_CMD_SWITCH)
 452                 mask = MASK_MRBSYE;
 453         else
 454                 mask = MASK_MCRSPE;
 455
 456         mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
 457                 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
 458                 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
 459                 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
 460
 461         if (host->data) {
 462                 sh_mmcif_write(0, &host->regs->ce_block_set);
 463                 sh_mmcif_write(data->blocksize, &host->regs->ce_block_set);
 464         }
 465         opc = sh_mmcif_set_cmd(host, data, cmd);
 466
 467         sh_mmcif_write(INT_START_MAGIC, &host->regs->ce_int);
 468         sh_mmcif_write(mask, &host->regs->ce_int_mask);
 469
 470         debug("CMD%d ARG:%08x\n", cmd->cmdidx, cmd->cmdarg);
 471         /* set arg */
 472         sh_mmcif_write(cmd->cmdarg, &host->regs->ce_arg);
 473         host->wait_int = 0;
 474         /* set cmd */
 475         sh_mmcif_write(opc, &host->regs->ce_cmd_set);
 476
 477         time = mmcif_wait_interrupt_flag(host);
 478         if (time == 0)
 479                 return sh_mmcif_error_manage(host);
 480
 481         if (host->sd_error) {
 482                 switch (cmd->cmdidx) {
 483                 case MMC_CMD_ALL_SEND_CID:
 484                 case MMC_CMD_SELECT_CARD:
 485                 case MMC_CMD_APP_CMD:
 486                         ret = -ETIMEDOUT;
 487                         break;
 488                 default:
 489                         printf(DRIVER_NAME": Cmd(d'%d) err\n", cmd->cmdidx);
 490                         ret = sh_mmcif_error_manage(host);
 491                         break;
 492                 }
 493                 host->sd_error = 0;
 494                 host->wait_int = 0;
 495                 return ret;
 496         }
 497
 498         /* if no response */
 499         if (!(opc & 0x00C00000))
 500                 return 0;
 501
 502         if (host->wait_int == 1) {
 503                 sh_mmcif_get_response(host, cmd);
 504                 host->wait_int = 0;
 505         }
 506         if (host->data)
 507                 ret = sh_mmcif_data_trans(host, data, cmd->cmdidx);
 508         host->last_cmd = cmd->cmdidx;
 509
 510         return ret;
 511 }
 512
 513 static int sh_mmcif_request(struct mmc *mmc, struct mmc_cmd *cmd,
 514                             struct mmc_data *data)
 515 {
 516         struct sh_mmcif_host *host = mmc->priv;
 517         int ret;
 518
 519         WATCHDOG_RESET();
 520
 521         switch (cmd->cmdidx) {
 522         case MMC_CMD_APP_CMD:
 523                 return -ETIMEDOUT;
 524         case MMC_CMD_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
 525                 if (data)
 526                         /* ext_csd */
 527                         break;
 528                 else
 529                         /* send_if_cond cmd (not support) */
 530                         return -ETIMEDOUT;
 531         default:
 532                 break;
 533         }
 534         host->sd_error = 0;
 535         host->data = data;
 536         ret = sh_mmcif_start_cmd(host, data, cmd);
 537         host->data = NULL;
 538
 539         return ret;
 540 }
 541
 542 static void sh_mmcif_set_ios(struct mmc *mmc)
 543 {
 544         struct sh_mmcif_host *host = mmc->priv;
 545
 546         if (mmc->clock)
 547                 sh_mmcif_clock_control(host, mmc->clock);
 548
 549         if (mmc->bus_width == 8)
 550                 host->bus_width = MMC_BUS_WIDTH_8;
 551         else if (mmc->bus_width == 4)
 552                 host->bus_width = MMC_BUS_WIDTH_4;
 553         else
 554                 host->bus_width = MMC_BUS_WIDTH_1;
 555
 556         debug("clock = %d, buswidth = %d\n", mmc->clock, mmc->bus_width);
 557 }
 558
 559 static int sh_mmcif_init(struct mmc *mmc)
 560 {
 561         struct sh_mmcif_host *host = mmc->priv;
 562
 563         sh_mmcif_sync_reset(host);
 564         sh_mmcif_write(MASK_ALL, &host->regs->ce_int_mask);
 565         return 0;
 566 }
 567
 568 static const struct mmc_ops sh_mmcif_ops = {
 569         .send_cmd       = sh_mmcif_request,
 570         .set_ios        = sh_mmcif_set_ios,
 571         .init           = sh_mmcif_init,
 572 };
 573
 574 static struct mmc_config sh_mmcif_cfg = {
 575         .name           = DRIVER_NAME,
 576         .ops            = &sh_mmcif_ops,
 577         .host_caps      = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT |
 578                           MMC_MODE_8BIT,
 579         .voltages       = MMC_VDD_32_33 | MMC_VDD_33_34,
 580         .b_max          = CONFIG_SYS_MMC_MAX_BLK_COUNT,
 581 };
 582
 583 int mmcif_mmc_init(void)
 584 {
 585         struct mmc *mmc;
 586         struct sh_mmcif_host *host = NULL;
 587
 588         host = malloc(sizeof(struct sh_mmcif_host));
 589         if (!host)
 590                 return -ENOMEM;
 591         memset(host, 0, sizeof(*host));
 592
 593         host->regs = (struct sh_mmcif_regs *)CONFIG_SH_MMCIF_ADDR;
 594         host->clk = CONFIG_SH_MMCIF_CLK;
 595
 596         sh_mmcif_cfg.f_min = MMC_CLK_DIV_MIN(host->clk);
 597         sh_mmcif_cfg.f_max = MMC_CLK_DIV_MAX(host->clk);
 598
 599         mmc = mmc_create(&sh_mmcif_cfg, host);
 600         if (mmc == NULL) {
 601                 free(host);
 602                 return -ENOMEM;
 603         }
 604
 605         return 0;
 606 }