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