drivers/mmc/sh_mmcif.c

   1 /*
   2  * MMCIF driver.
   3  *
   4  * Copyright (C)  2011 Renesas Solutions Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License.
   9  */
  10
  11 #include <config.h>
  12 #include <common.h>
  13 #include <watchdog.h>
  14 #include <command.h>
  15 #include <mmc.h>
  16 #include <malloc.h>
  17 #include <asm/errno.h>
  18 #include <asm/io.h>
  19 #include "sh_mmcif.h"
  20
  21 #define DRIVER_NAME     "sh_mmcif"
  22
  23 static int sh_mmcif_intr(void *dev_id)
  24 {
  25         struct sh_mmcif_host *host = dev_id;
  26         u32 state = 0;
  27
  28         state = sh_mmcif_read(&host->regs->ce_int);
  29         state &= sh_mmcif_read(&host->regs->ce_int_mask);
  30
  31         if (state & INT_RBSYE) {
  32                 sh_mmcif_write(~(INT_RBSYE | INT_CRSPE), &host->regs->ce_int);
  33                 sh_mmcif_bitclr(MASK_MRBSYE, &host->regs->ce_int_mask);
  34                 goto end;
  35         } else if (state & INT_CRSPE) {
  36                 sh_mmcif_write(~INT_CRSPE, &host->regs->ce_int);
  37                 sh_mmcif_bitclr(MASK_MCRSPE, &host->regs->ce_int_mask);
  38                 /* one more interrupt (INT_RBSYE) */
  39                 if (sh_mmcif_read(&host->regs->ce_cmd_set) & CMD_SET_RBSY)
  40                         return -EAGAIN;
  41                 goto end;
  42         } else if (state & INT_BUFREN) {
  43                 sh_mmcif_write(~INT_BUFREN, &host->regs->ce_int);
  44                 sh_mmcif_bitclr(MASK_MBUFREN, &host->regs->ce_int_mask);
  45                 goto end;
  46         } else if (state & INT_BUFWEN) {
  47                 sh_mmcif_write(~INT_BUFWEN, &host->regs->ce_int);
  48                 sh_mmcif_bitclr(MASK_MBUFWEN, &host->regs->ce_int_mask);
  49                 goto end;
  50         } else if (state & INT_CMD12DRE) {
  51                 sh_mmcif_write(~(INT_CMD12DRE | INT_CMD12RBE | INT_CMD12CRE |
  52                                   INT_BUFRE), &host->regs->ce_int);
  53                 sh_mmcif_bitclr(MASK_MCMD12DRE, &host->regs->ce_int_mask);
  54                 goto end;
  55         } else if (state & INT_BUFRE) {
  56                 sh_mmcif_write(~INT_BUFRE, &host->regs->ce_int);
  57                 sh_mmcif_bitclr(MASK_MBUFRE, &host->regs->ce_int_mask);
  58                 goto end;
  59         } else if (state & INT_DTRANE) {
  60                 sh_mmcif_write(~INT_DTRANE, &host->regs->ce_int);
  61                 sh_mmcif_bitclr(MASK_MDTRANE, &host->regs->ce_int_mask);
  62                 goto end;
  63         } else if (state & INT_CMD12RBE) {
  64                 sh_mmcif_write(~(INT_CMD12RBE | INT_CMD12CRE),
  65                                 &host->regs->ce_int);
  66                 sh_mmcif_bitclr(MASK_MCMD12RBE, &host->regs->ce_int_mask);
  67                 goto end;
  68         } else if (state & INT_ERR_STS) {
  69                 /* err interrupts */
  70                 sh_mmcif_write(~state, &host->regs->ce_int);
  71                 sh_mmcif_bitclr(state, &host->regs->ce_int_mask);
  72                 goto err;
  73         } else
  74                 return -EAGAIN;
  75
  76 err:
  77         host->sd_error = 1;
  78         debug("%s: int err state = %08x\n", DRIVER_NAME, state);
  79 end:
  80         host->wait_int = 1;
  81         return 0;
  82 }
  83
  84 static int mmcif_wait_interrupt_flag(struct sh_mmcif_host *host)
  85 {
  86         int timeout = 10000000;
  87
  88         while (1) {
  89                 timeout--;
  90                 if (timeout < 0) {
  91                         printf("timeout\n");
  92                         return 0;
  93                 }
  94
  95                 if (!sh_mmcif_intr(host))
  96                         break;
  97
  98                 udelay(1);      /* 1 usec */
  99         }
 100
 101         return 1;       /* Return value: NOT 0 = complete waiting */
 102 }
 103
 104 static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
 105 {
 106         int i;
 107
 108         sh_mmcif_bitclr(CLK_ENABLE, &host->regs->ce_clk_ctrl);
 109         sh_mmcif_bitclr(CLK_CLEAR, &host->regs->ce_clk_ctrl);
 110
 111         if (!clk)
 112                 return;
 113         if (clk == CLKDEV_EMMC_DATA) {
 114                 sh_mmcif_bitset(CLK_PCLK, &host->regs->ce_clk_ctrl);
 115         } else {
 116                 for (i = 1; (unsigned int)host->clk / (1 << i) >= clk; i++)
 117                         ;
 118                 sh_mmcif_bitset((i - 1) << 16, &host->regs->ce_clk_ctrl);
 119         }
 120         sh_mmcif_bitset(CLK_ENABLE, &host->regs->ce_clk_ctrl);
 121 }
 122
 123 static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
 124 {
 125         u32 tmp;
 126
 127         tmp = sh_mmcif_read(&host->regs->ce_clk_ctrl) & (CLK_ENABLE |
 128                                                          CLK_CLEAR);
 129
 130         sh_mmcif_write(SOFT_RST_ON, &host->regs->ce_version);
 131         sh_mmcif_write(SOFT_RST_OFF, &host->regs->ce_version);
 132         sh_mmcif_bitset(tmp | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29,
 133                         &host->regs->ce_clk_ctrl);
 134         /* byte swap on */
 135         sh_mmcif_bitset(BUF_ACC_ATYP, &host->regs->ce_buf_acc);
 136 }
 137
 138 static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
 139 {
 140         u32 state1, state2;
 141         int ret, timeout = 10000000;
 142
 143         host->sd_error = 0;
 144         host->wait_int = 0;
 145
 146         state1 = sh_mmcif_read(&host->regs->ce_host_sts1);
 147         state2 = sh_mmcif_read(&host->regs->ce_host_sts2);
 148         debug("%s: ERR HOST_STS1 = %08x\n", \
 149                         DRIVER_NAME, sh_mmcif_read(&host->regs->ce_host_sts1));
 150         debug("%s: ERR HOST_STS2 = %08x\n", \
 151                         DRIVER_NAME, sh_mmcif_read(&host->regs->ce_host_sts2));
 152
 153         if (state1 & STS1_CMDSEQ) {
 154                 debug("%s: Forced end of command sequence\n", DRIVER_NAME);
 155                 sh_mmcif_bitset(CMD_CTRL_BREAK, &host->regs->ce_cmd_ctrl);
 156                 sh_mmcif_bitset(~CMD_CTRL_BREAK, &host->regs->ce_cmd_ctrl);
 157                 while (1) {
 158                         timeout--;
 159                         if (timeout < 0) {
 160                                 printf(DRIVER_NAME": Forceed end of " \
 161                                         "command sequence timeout err\n");
 162                                 return -EILSEQ;
 163                         }
 164                         if (!(sh_mmcif_read(&host->regs->ce_host_sts1)
 165                                                                 & STS1_CMDSEQ))
 166                                 break;
 167                 }
 168                 sh_mmcif_sync_reset(host);
 169                 return -EILSEQ;
 170         }
 171
 172         if (state2 & STS2_CRC_ERR)
 173                 ret = -EILSEQ;
 174         else if (state2 & STS2_TIMEOUT_ERR)
 175                 ret = TIMEOUT;
 176         else
 177                 ret = -EILSEQ;
 178         return ret;
 179 }
 180
 181 static int sh_mmcif_single_read(struct sh_mmcif_host *host,
 182                                 struct mmc_data *data)
 183 {
 184         long time;
 185         u32 blocksize, i;
 186         unsigned long *p = (unsigned long *)data->dest;
 187
 188         if ((unsigned long)p & 0x00000001) {
 189                 printf("%s: The data pointer is unaligned.", __func__);
 190                 return -EIO;
 191         }
 192
 193         host->wait_int = 0;
 194
 195         /* buf read enable */
 196         sh_mmcif_bitset(MASK_MBUFREN, &host->regs->ce_int_mask);
 197         time = mmcif_wait_interrupt_flag(host);
 198         if (time == 0 || host->sd_error != 0)
 199                 return sh_mmcif_error_manage(host);
 200
 201         host->wait_int = 0;
 202         blocksize = (BLOCK_SIZE_MASK &
 203                         sh_mmcif_read(&host->regs->ce_block_set)) + 3;
 204         for (i = 0; i < blocksize / 4; i++)
 205                 *p++ = sh_mmcif_read(&host->regs->ce_data);
 206
 207         /* buffer read end */
 208         sh_mmcif_bitset(MASK_MBUFRE, &host->regs->ce_int_mask);
 209         time = mmcif_wait_interrupt_flag(host);
 210         if (time == 0 || host->sd_error != 0)
 211                 return sh_mmcif_error_manage(host);
 212
 213         host->wait_int = 0;
 214         return 0;
 215 }
 216
 217 static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
 218                                 struct mmc_data *data)
 219 {
 220         long time;
 221         u32 blocksize, i, j;
 222         unsigned long *p = (unsigned long *)data->dest;
 223
 224         if ((unsigned long)p & 0x00000001) {
 225                 printf("%s: The data pointer is unaligned.", __func__);
 226                 return -EIO;
 227         }
 228
 229         host->wait_int = 0;
 230         blocksize = BLOCK_SIZE_MASK & sh_mmcif_read(&host->regs->ce_block_set);
 231         for (j = 0; j < data->blocks; j++) {
 232                 sh_mmcif_bitset(MASK_MBUFREN, &host->regs->ce_int_mask);
 233                 time = mmcif_wait_interrupt_flag(host);
 234                 if (time == 0 || host->sd_error != 0)
 235                         return sh_mmcif_error_manage(host);
 236
 237                 host->wait_int = 0;
 238                 for (i = 0; i < blocksize / 4; i++)
 239                         *p++ = sh_mmcif_read(&host->regs->ce_data);
 240
 241                 WATCHDOG_RESET();
 242         }
 243         return 0;
 244 }
 245
 246 static int sh_mmcif_single_write(struct sh_mmcif_host *host,
 247                                  struct mmc_data *data)
 248 {
 249         long time;
 250         u32 blocksize, i;
 251         const unsigned long *p = (unsigned long *)data->dest;
 252
 253         if ((unsigned long)p & 0x00000001) {
 254                 printf("%s: The data pointer is unaligned.", __func__);
 255                 return -EIO;
 256         }
 257
 258         host->wait_int = 0;
 259         sh_mmcif_bitset(MASK_MBUFWEN, &host->regs->ce_int_mask);
 260
 261         time = mmcif_wait_interrupt_flag(host);
 262         if (time == 0 || host->sd_error != 0)
 263                 return sh_mmcif_error_manage(host);
 264
 265         host->wait_int = 0;
 266         blocksize = (BLOCK_SIZE_MASK &
 267                         sh_mmcif_read(&host->regs->ce_block_set)) + 3;
 268         for (i = 0; i < blocksize / 4; i++)
 269                 sh_mmcif_write(*p++, &host->regs->ce_data);
 270
 271         /* buffer write end */
 272         sh_mmcif_bitset(MASK_MDTRANE, &host->regs->ce_int_mask);
 273
 274         time = mmcif_wait_interrupt_flag(host);
 275         if (time == 0 || host->sd_error != 0)
 276                 return sh_mmcif_error_manage(host);
 277
 278         host->wait_int = 0;
 279         return 0;
 280 }
 281
 282 static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
 283                                 struct mmc_data *data)
 284 {
 285         long time;
 286         u32 i, j, blocksize;
 287         const unsigned long *p = (unsigned long *)data->dest;
 288
 289         if ((unsigned long)p & 0x00000001) {
 290                 printf("%s: The data pointer is unaligned.", __func__);
 291                 return -EIO;
 292         }
 293
 294         host->wait_int = 0;
 295         blocksize = BLOCK_SIZE_MASK & sh_mmcif_read(&host->regs->ce_block_set);
 296         for (j = 0; j < data->blocks; j++) {
 297                 sh_mmcif_bitset(MASK_MBUFWEN, &host->regs->ce_int_mask);
 298
 299                 time = mmcif_wait_interrupt_flag(host);
 300
 301                 if (time == 0 || host->sd_error != 0)
 302                         return sh_mmcif_error_manage(host);
 303
 304                 host->wait_int = 0;
 305                 for (i = 0; i < blocksize / 4; i++)
 306                         sh_mmcif_write(*p++, &host->regs->ce_data);
 307
 308                 WATCHDOG_RESET();
 309         }
 310         return 0;
 311 }
 312
 313 static void sh_mmcif_get_response(struct sh_mmcif_host *host,
 314                                         struct mmc_cmd *cmd)
 315 {
 316         if (cmd->resp_type & MMC_RSP_136) {
 317                 cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp3);
 318                 cmd->response[1] = sh_mmcif_read(&host->regs->ce_resp2);
 319                 cmd->response[2] = sh_mmcif_read(&host->regs->ce_resp1);
 320                 cmd->response[3] = sh_mmcif_read(&host->regs->ce_resp0);
 321                 debug(" RESP %08x, %08x, %08x, %08x\n", cmd->response[0],
 322                          cmd->response[1], cmd->response[2], cmd->response[3]);
 323         } else {
 324                 cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp0);
 325         }
 326 }
 327
 328 static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
 329                                         struct mmc_cmd *cmd)
 330 {
 331         cmd->response[0] = sh_mmcif_read(&host->regs->ce_resp_cmd12);
 332 }
 333
 334 static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 335                                 struct mmc_data *data, struct mmc_cmd *cmd)
 336 {
 337         u32 tmp = 0;
 338         u32 opc = cmd->cmdidx;
 339
 340         /* Response Type check */
 341         switch (cmd->resp_type) {
 342         case MMC_RSP_NONE:
 343                 tmp |= CMD_SET_RTYP_NO;
 344                 break;
 345         case MMC_RSP_R1:
 346         case MMC_RSP_R1b:
 347         case MMC_RSP_R3:
 348                 tmp |= CMD_SET_RTYP_6B;
 349                 break;
 350         case MMC_RSP_R2:
 351                 tmp |= CMD_SET_RTYP_17B;
 352                 break;
 353         default:
 354                 printf(DRIVER_NAME": Not support type response.\n");
 355                 break;
 356         }
 357
 358         /* RBSY */
 359         if (opc == MMC_CMD_SWITCH)
 360                 tmp |= CMD_SET_RBSY;
 361
 362         /* WDAT / DATW */
 363         if (host->data) {
 364                 tmp |= CMD_SET_WDAT;
 365                 switch (host->bus_width) {
 366                 case MMC_BUS_WIDTH_1:
 367                         tmp |= CMD_SET_DATW_1;
 368                         break;
 369                 case MMC_BUS_WIDTH_4:
 370                         tmp |= CMD_SET_DATW_4;
 371                         break;
 372                 case MMC_BUS_WIDTH_8:
 373                         tmp |= CMD_SET_DATW_8;
 374                         break;
 375                 default:
 376                         printf(DRIVER_NAME": Not support bus width.\n");
 377                         break;
 378                 }
 379         }
 380         /* DWEN */
 381         if (opc == MMC_CMD_WRITE_SINGLE_BLOCK ||
 382             opc == MMC_CMD_WRITE_MULTIPLE_BLOCK)
 383                 tmp |= CMD_SET_DWEN;
 384         /* CMLTE/CMD12EN */
 385         if (opc == MMC_CMD_READ_MULTIPLE_BLOCK ||
 386             opc == MMC_CMD_WRITE_MULTIPLE_BLOCK) {
 387                 tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
 388                 sh_mmcif_bitset(data->blocks << 16, &host->regs->ce_block_set);
 389         }
 390         /* RIDXC[1:0] check bits */
 391         if (opc == MMC_CMD_SEND_OP_COND || opc == MMC_CMD_ALL_SEND_CID ||
 392             opc == MMC_CMD_SEND_CSD || opc == MMC_CMD_SEND_CID)
 393                 tmp |= CMD_SET_RIDXC_BITS;
 394         /* RCRC7C[1:0] check bits */
 395         if (opc == MMC_CMD_SEND_OP_COND)
 396                 tmp |= CMD_SET_CRC7C_BITS;
 397         /* RCRC7C[1:0] internal CRC7 */
 398         if (opc == MMC_CMD_ALL_SEND_CID ||
 399                 opc == MMC_CMD_SEND_CSD || opc == MMC_CMD_SEND_CID)
 400                 tmp |= CMD_SET_CRC7C_INTERNAL;
 401
 402         return opc = ((opc << 24) | tmp);
 403 }
 404
 405 static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host,
 406                                 struct mmc_data *data, u16 opc)
 407 {
 408         u32 ret;
 409
 410         switch (opc) {
 411         case MMC_CMD_READ_MULTIPLE_BLOCK:
 412                 ret = sh_mmcif_multi_read(host, data);
 413                 break;
 414         case MMC_CMD_WRITE_MULTIPLE_BLOCK:
 415                 ret = sh_mmcif_multi_write(host, data);
 416                 break;
 417         case MMC_CMD_WRITE_SINGLE_BLOCK:
 418                 ret = sh_mmcif_single_write(host, data);
 419                 break;
 420         case MMC_CMD_READ_SINGLE_BLOCK:
 421         case MMC_CMD_SEND_EXT_CSD:
 422                 ret = sh_mmcif_single_read(host, data);
 423                 break;
 424         default:
 425                 printf(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc);
 426                 ret = -EINVAL;
 427                 break;
 428         }
 429         return ret;
 430 }
 431
 432 static int sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 433                                 struct mmc_data *data, struct mmc_cmd *cmd)
 434 {
 435         long time;
 436         int ret = 0, mask = 0;
 437         u32 opc = cmd->cmdidx;
 438
 439         if (opc == MMC_CMD_STOP_TRANSMISSION) {
 440                 /* MMCIF sends the STOP command automatically */
 441                 if (host->last_cmd == MMC_CMD_READ_MULTIPLE_BLOCK)
 442                         sh_mmcif_bitset(MASK_MCMD12DRE,
 443                                         &host->regs->ce_int_mask);
 444                 else
 445                         sh_mmcif_bitset(MASK_MCMD12RBE,
 446                                         &host->regs->ce_int_mask);
 447
 448                 time = mmcif_wait_interrupt_flag(host);
 449                 if (time == 0 || host->sd_error != 0)
 450                         return sh_mmcif_error_manage(host);
 451
 452                 sh_mmcif_get_cmd12response(host, cmd);
 453                 return 0;
 454         }
 455         if (opc == MMC_CMD_SWITCH)
 456                 mask = MASK_MRBSYE;
 457         else
 458                 mask = MASK_MCRSPE;
 459
 460         mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
 461                 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
 462                 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
 463                 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
 464
 465         if (host->data) {
 466                 sh_mmcif_write(0, &host->regs->ce_block_set);
 467                 sh_mmcif_write(data->blocksize, &host->regs->ce_block_set);
 468         }
 469         opc = sh_mmcif_set_cmd(host, data, cmd);
 470
 471         sh_mmcif_write(INT_START_MAGIC, &host->regs->ce_int);
 472         sh_mmcif_write(mask, &host->regs->ce_int_mask);
 473
 474         debug("CMD%d ARG:%08x\n", cmd->cmdidx, cmd->cmdarg);
 475         /* set arg */
 476         sh_mmcif_write(cmd->cmdarg, &host->regs->ce_arg);
 477         host->wait_int = 0;
 478         /* set cmd */
 479         sh_mmcif_write(opc, &host->regs->ce_cmd_set);
 480
 481         time = mmcif_wait_interrupt_flag(host);
 482         if (time == 0)
 483                 return sh_mmcif_error_manage(host);
 484
 485         if (host->sd_error) {
 486                 switch (cmd->cmdidx) {
 487                 case MMC_CMD_ALL_SEND_CID:
 488                 case MMC_CMD_SELECT_CARD:
 489                 case MMC_CMD_APP_CMD:
 490                         ret = TIMEOUT;
 491                         break;
 492                 default:
 493                         printf(DRIVER_NAME": Cmd(d'%d) err\n", cmd->cmdidx);
 494                         ret = sh_mmcif_error_manage(host);
 495                         break;
 496                 }
 497                 host->sd_error = 0;
 498                 host->wait_int = 0;
 499                 return ret;
 500         }
 501
 502         /* if no response */
 503         if (!(opc & 0x00C00000))
 504                 return 0;
 505
 506         if (host->wait_int == 1) {
 507                 sh_mmcif_get_response(host, cmd);
 508                 host->wait_int = 0;
 509         }
 510         if (host->data)
 511                 ret = sh_mmcif_data_trans(host, data, cmd->cmdidx);
 512         host->last_cmd = cmd->cmdidx;
 513
 514         return ret;
 515 }
 516
 517 static int sh_mmcif_request(struct mmc *mmc, struct mmc_cmd *cmd,
 518                             struct mmc_data *data)
 519 {
 520         struct sh_mmcif_host *host = mmc->priv;
 521         int ret;
 522
 523         WATCHDOG_RESET();
 524
 525         switch (cmd->cmdidx) {
 526         case MMC_CMD_APP_CMD:
 527                 return TIMEOUT;
 528         case MMC_CMD_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
 529                 if (data)
 530                         /* ext_csd */
 531                         break;
 532                 else
 533                         /* send_if_cond cmd (not support) */
 534                         return TIMEOUT;
 535         default:
 536                 break;
 537         }
 538         host->sd_error = 0;
 539         host->data = data;
 540         ret = sh_mmcif_start_cmd(host, data, cmd);
 541         host->data = NULL;
 542
 543         return ret;
 544 }
 545
 546 static void sh_mmcif_set_ios(struct mmc *mmc)
 547 {
 548         struct sh_mmcif_host *host = mmc->priv;
 549
 550         if (mmc->clock)
 551                 sh_mmcif_clock_control(host, mmc->clock);
 552
 553         if (mmc->bus_width == 8)
 554                 host->bus_width = MMC_BUS_WIDTH_8;
 555         else if (mmc->bus_width == 4)
 556                 host->bus_width = MMC_BUS_WIDTH_4;
 557         else
 558                 host->bus_width = MMC_BUS_WIDTH_1;
 559
 560         debug("clock = %d, buswidth = %d\n", mmc->clock, mmc->bus_width);
 561 }
 562
 563 static int sh_mmcif_init(struct mmc *mmc)
 564 {
 565         struct sh_mmcif_host *host = mmc->priv;
 566
 567         sh_mmcif_sync_reset(host);
 568         sh_mmcif_write(MASK_ALL, &host->regs->ce_int_mask);
 569         return 0;
 570 }
 571
 572 static const struct mmc_ops sh_mmcif_ops = {
 573         .send_cmd       = sh_mmcif_request,
 574         .set_ios        = sh_mmcif_set_ios,
 575         .init           = sh_mmcif_init,
 576 };
 577
 578 static struct mmc_config sh_mmcif_cfg = {
 579         .name           = DRIVER_NAME,
 580         .ops            = &sh_mmcif_ops,
 581         .host_caps      = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT |
 582                           MMC_MODE_8BIT | MMC_MODE_HC,
 583         .voltages       = MMC_VDD_32_33 | MMC_VDD_33_34;
 584         .f_min          = CLKDEV_MMC_INIT,
 585         .f_max          = CLKDEV_EMMC_DATA,
 586         .b_max          = CONFIG_SYS_MMC_MAX_BLK_COUNT,
 587 };
 588
 589 int mmcif_mmc_init(void)
 590 {
 591         int ret = 0;
 592         struct mmc *mmc;
 593         struct sh_mmcif_host *host = NULL;
 594
 595         host = malloc(sizeof(struct sh_mmcif_host));
 596         if (!host)
 597                 ret = -ENOMEM;
 598         memset(host, 0, sizeof(*host));
 599
 600         host->regs = (struct sh_mmcif_regs *)CONFIG_SH_MMCIF_ADDR;
 601         host->clk = CONFIG_SH_MMCIF_CLK;
 602
 603         mmc = mmc_create(&sh_mmcif_cfg, host);
 604         if (mmc == NULL) {
 605                 free(host);
 606                 return -ENOMEM;
 607         }
 608
 609         return 0;
 610 }