drivers/mmc/mmc.c

   1 /*
   2  * Copyright 2008, Freescale Semiconductor, Inc
   3  * Andy Fleming
   4  *
   5  * Based vaguely on the Linux code
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <config.h>
  11 #include <common.h>
  12 #include <command.h>
  13 #include <errno.h>
  14 #include <mmc.h>
  15 #include <part.h>
  16 #include <malloc.h>
  17 #include <linux/list.h>
  18 #include <div64.h>
  19 #include "mmc_private.h"
  20
  21 static struct list_head mmc_devices;
  22 static int cur_dev_num = -1;
  23
  24 __weak int board_mmc_getwp(struct mmc *mmc)
  25 {
  26         return -1;
  27 }
  28
  29 int mmc_getwp(struct mmc *mmc)
  30 {
  31         int wp;
  32
  33         wp = board_mmc_getwp(mmc);
  34
  35         if (wp < 0) {
  36                 if (mmc->cfg->ops->getwp)
  37                         wp = mmc->cfg->ops->getwp(mmc);
  38                 else
  39                         wp = 0;
  40         }
  41
  42         return wp;
  43 }
  44
  45 __weak int board_mmc_getcd(struct mmc *mmc)
  46 {
  47         return -1;
  48 }
  49
  50 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
  51 {
  52         int ret;
  53
  54 #ifdef CONFIG_MMC_TRACE
  55         int i;
  56         u8 *ptr;
  57
  58         printf("CMD_SEND:%d\n", cmd->cmdidx);
  59         printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
  60         ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
  61         switch (cmd->resp_type) {
  62                 case MMC_RSP_NONE:
  63                         printf("\t\tMMC_RSP_NONE\n");
  64                         break;
  65                 case MMC_RSP_R1:
  66                         printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
  67                                 cmd->response[0]);
  68                         break;
  69                 case MMC_RSP_R1b:
  70                         printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
  71                                 cmd->response[0]);
  72                         break;
  73                 case MMC_RSP_R2:
  74                         printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
  75                                 cmd->response[0]);
  76                         printf("\t\t          \t\t 0x%08X \n",
  77                                 cmd->response[1]);
  78                         printf("\t\t          \t\t 0x%08X \n",
  79                                 cmd->response[2]);
  80                         printf("\t\t          \t\t 0x%08X \n",
  81                                 cmd->response[3]);
  82                         printf("\n");
  83                         printf("\t\t\t\t\tDUMPING DATA\n");
  84                         for (i = 0; i < 4; i++) {
  85                                 int j;
  86                                 printf("\t\t\t\t\t%03d - ", i*4);
  87                                 ptr = (u8 *)&cmd->response[i];
  88                                 ptr += 3;
  89                                 for (j = 0; j < 4; j++)
  90                                         printf("%02X ", *ptr--);
  91                                 printf("\n");
  92                         }
  93                         break;
  94                 case MMC_RSP_R3:
  95                         printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
  96                                 cmd->response[0]);
  97                         break;
  98                 default:
  99                         printf("\t\tERROR MMC rsp not supported\n");
 100                         break;
 101         }
 102 #else
 103         ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
 104 #endif
 105         return ret;
 106 }
 107
 108 int mmc_send_status(struct mmc *mmc, int timeout)
 109 {
 110         struct mmc_cmd cmd;
 111         int err, retries = 5;
 112 #ifdef CONFIG_MMC_TRACE
 113         int status;
 114 #endif
 115
 116         cmd.cmdidx = MMC_CMD_SEND_STATUS;
 117         cmd.resp_type = MMC_RSP_R1;
 118         if (!mmc_host_is_spi(mmc))
 119                 cmd.cmdarg = mmc->rca << 16;
 120
 121         do {
 122                 err = mmc_send_cmd(mmc, &cmd, NULL);
 123                 if (!err) {
 124                         if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
 125                             (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
 126                              MMC_STATE_PRG)
 127                                 break;
 128                         else if (cmd.response[0] & MMC_STATUS_MASK) {
 129 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 130                                 printf("Status Error: 0x%08X\n",
 131                                         cmd.response[0]);
 132 #endif
 133                                 return COMM_ERR;
 134                         }
 135                 } else if (--retries < 0)
 136                         return err;
 137
 138                 udelay(1000);
 139
 140         } while (timeout--);
 141
 142 #ifdef CONFIG_MMC_TRACE
 143         status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
 144         printf("CURR STATE:%d\n", status);
 145 #endif
 146         if (timeout <= 0) {
 147 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 148                 printf("Timeout waiting card ready\n");
 149 #endif
 150                 return TIMEOUT;
 151         }
 152         if (cmd.response[0] & MMC_STATUS_SWITCH_ERROR)
 153                 return SWITCH_ERR;
 154
 155         return 0;
 156 }
 157
 158 int mmc_set_blocklen(struct mmc *mmc, int len)
 159 {
 160         struct mmc_cmd cmd;
 161
 162         if (mmc->card_caps & MMC_MODE_DDR_52MHz)
 163                 return 0;
 164
 165         cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
 166         cmd.resp_type = MMC_RSP_R1;
 167         cmd.cmdarg = len;
 168
 169         return mmc_send_cmd(mmc, &cmd, NULL);
 170 }
 171
 172 struct mmc *find_mmc_device(int dev_num)
 173 {
 174         struct mmc *m;
 175         struct list_head *entry;
 176
 177         list_for_each(entry, &mmc_devices) {
 178                 m = list_entry(entry, struct mmc, link);
 179
 180                 if (m->block_dev.dev == dev_num)
 181                         return m;
 182         }
 183
 184 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 185         printf("MMC Device %d not found\n", dev_num);
 186 #endif
 187
 188         return NULL;
 189 }
 190
 191 static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
 192                            lbaint_t blkcnt)
 193 {
 194         struct mmc_cmd cmd;
 195         struct mmc_data data;
 196
 197         if (blkcnt > 1)
 198                 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
 199         else
 200                 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
 201
 202         if (mmc->high_capacity)
 203                 cmd.cmdarg = start;
 204         else
 205                 cmd.cmdarg = start * mmc->read_bl_len;
 206
 207         cmd.resp_type = MMC_RSP_R1;
 208
 209         data.dest = dst;
 210         data.blocks = blkcnt;
 211         data.blocksize = mmc->read_bl_len;
 212         data.flags = MMC_DATA_READ;
 213
 214         if (mmc_send_cmd(mmc, &cmd, &data))
 215                 return 0;
 216
 217         if (blkcnt > 1) {
 218                 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
 219                 cmd.cmdarg = 0;
 220                 cmd.resp_type = MMC_RSP_R1b;
 221                 if (mmc_send_cmd(mmc, &cmd, NULL)) {
 222 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 223                         printf("mmc fail to send stop cmd\n");
 224 #endif
 225                         return 0;
 226                 }
 227         }
 228
 229         return blkcnt;
 230 }
 231
 232 static ulong mmc_bread(int dev_num, lbaint_t start, lbaint_t blkcnt, void *dst)
 233 {
 234         lbaint_t cur, blocks_todo = blkcnt;
 235
 236         if (blkcnt == 0)
 237                 return 0;
 238
 239         struct mmc *mmc = find_mmc_device(dev_num);
 240         if (!mmc)
 241                 return 0;
 242
 243         if ((start + blkcnt) > mmc->block_dev.lba) {
 244 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 245                 printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
 246                         start + blkcnt, mmc->block_dev.lba);
 247 #endif
 248                 return 0;
 249         }
 250
 251         if (mmc_set_blocklen(mmc, mmc->read_bl_len))
 252                 return 0;
 253
 254         do {
 255                 cur = (blocks_todo > mmc->cfg->b_max) ?
 256                         mmc->cfg->b_max : blocks_todo;
 257                 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
 258                         return 0;
 259                 blocks_todo -= cur;
 260                 start += cur;
 261                 dst += cur * mmc->read_bl_len;
 262         } while (blocks_todo > 0);
 263
 264         return blkcnt;
 265 }
 266
 267 static int mmc_go_idle(struct mmc *mmc)
 268 {
 269         struct mmc_cmd cmd;
 270         int err;
 271
 272         udelay(1000);
 273
 274         cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
 275         cmd.cmdarg = 0;
 276         cmd.resp_type = MMC_RSP_NONE;
 277
 278         err = mmc_send_cmd(mmc, &cmd, NULL);
 279
 280         if (err)
 281                 return err;
 282
 283         udelay(2000);
 284
 285         return 0;
 286 }
 287
 288 static int sd_send_op_cond(struct mmc *mmc)
 289 {
 290         int timeout = 1000;
 291         int err;
 292         struct mmc_cmd cmd;
 293
 294         do {
 295                 cmd.cmdidx = MMC_CMD_APP_CMD;
 296                 cmd.resp_type = MMC_RSP_R1;
 297                 cmd.cmdarg = 0;
 298
 299                 err = mmc_send_cmd(mmc, &cmd, NULL);
 300
 301                 if (err)
 302                         return err;
 303
 304                 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
 305                 cmd.resp_type = MMC_RSP_R3;
 306
 307                 /*
 308                  * Most cards do not answer if some reserved bits
 309                  * in the ocr are set. However, Some controller
 310                  * can set bit 7 (reserved for low voltages), but
 311                  * how to manage low voltages SD card is not yet
 312                  * specified.
 313                  */
 314                 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
 315                         (mmc->cfg->voltages & 0xff8000);
 316
 317                 if (mmc->version == SD_VERSION_2)
 318                         cmd.cmdarg |= OCR_HCS;
 319
 320                 err = mmc_send_cmd(mmc, &cmd, NULL);
 321
 322                 if (err)
 323                         return err;
 324
 325                 udelay(1000);
 326         } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
 327
 328         if (timeout <= 0)
 329                 return UNUSABLE_ERR;
 330
 331         if (mmc->version != SD_VERSION_2)
 332                 mmc->version = SD_VERSION_1_0;
 333
 334         if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
 335                 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
 336                 cmd.resp_type = MMC_RSP_R3;
 337                 cmd.cmdarg = 0;
 338
 339                 err = mmc_send_cmd(mmc, &cmd, NULL);
 340
 341                 if (err)
 342                         return err;
 343         }
 344
 345         mmc->ocr = cmd.response[0];
 346
 347         mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
 348         mmc->rca = 0;
 349
 350         return 0;
 351 }
 352
 353 /* We pass in the cmd since otherwise the init seems to fail */
 354 static int mmc_send_op_cond_iter(struct mmc *mmc, struct mmc_cmd *cmd,
 355                 int use_arg)
 356 {
 357         int err;
 358
 359         cmd->cmdidx = MMC_CMD_SEND_OP_COND;
 360         cmd->resp_type = MMC_RSP_R3;
 361         cmd->cmdarg = 0;
 362         if (use_arg && !mmc_host_is_spi(mmc)) {
 363                 cmd->cmdarg =
 364                         (mmc->cfg->voltages &
 365                         (mmc->op_cond_response & OCR_VOLTAGE_MASK)) |
 366                         (mmc->op_cond_response & OCR_ACCESS_MODE);
 367
 368                 if (mmc->cfg->host_caps & MMC_MODE_HC)
 369                         cmd->cmdarg |= OCR_HCS;
 370         }
 371         err = mmc_send_cmd(mmc, cmd, NULL);
 372         if (err)
 373                 return err;
 374         mmc->op_cond_response = cmd->response[0];
 375         return 0;
 376 }
 377
 378 static int mmc_send_op_cond(struct mmc *mmc)
 379 {
 380         struct mmc_cmd cmd;
 381         int err, i;
 382
 383         /* Some cards seem to need this */
 384         mmc_go_idle(mmc);
 385
 386         /* Asking to the card its capabilities */
 387         mmc->op_cond_pending = 1;
 388         for (i = 0; i < 2; i++) {
 389                 err = mmc_send_op_cond_iter(mmc, &cmd, i != 0);
 390                 if (err)
 391                         return err;
 392
 393                 /* exit if not busy (flag seems to be inverted) */
 394                 if (mmc->op_cond_response & OCR_BUSY)
 395                         return 0;
 396         }
 397         return IN_PROGRESS;
 398 }
 399
 400 static int mmc_complete_op_cond(struct mmc *mmc)
 401 {
 402         struct mmc_cmd cmd;
 403         int timeout = 1000;
 404         uint start;
 405         int err;
 406
 407         mmc->op_cond_pending = 0;
 408         start = get_timer(0);
 409         do {
 410                 err = mmc_send_op_cond_iter(mmc, &cmd, 1);
 411                 if (err)
 412                         return err;
 413                 if (get_timer(start) > timeout)
 414                         return UNUSABLE_ERR;
 415                 udelay(100);
 416         } while (!(mmc->op_cond_response & OCR_BUSY));
 417
 418         if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
 419                 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
 420                 cmd.resp_type = MMC_RSP_R3;
 421                 cmd.cmdarg = 0;
 422
 423                 err = mmc_send_cmd(mmc, &cmd, NULL);
 424
 425                 if (err)
 426                         return err;
 427         }
 428
 429         mmc->version = MMC_VERSION_UNKNOWN;
 430         mmc->ocr = cmd.response[0];
 431
 432         mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
 433         mmc->rca = 1;
 434
 435         return 0;
 436 }
 437
 438
 439 static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
 440 {
 441         struct mmc_cmd cmd;
 442         struct mmc_data data;
 443         int err;
 444
 445         /* Get the Card Status Register */
 446         cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
 447         cmd.resp_type = MMC_RSP_R1;
 448         cmd.cmdarg = 0;
 449
 450         data.dest = (char *)ext_csd;
 451         data.blocks = 1;
 452         data.blocksize = MMC_MAX_BLOCK_LEN;
 453         data.flags = MMC_DATA_READ;
 454
 455         err = mmc_send_cmd(mmc, &cmd, &data);
 456
 457         return err;
 458 }
 459
 460
 461 static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
 462 {
 463         struct mmc_cmd cmd;
 464         int timeout = 1000;
 465         int ret;
 466
 467         cmd.cmdidx = MMC_CMD_SWITCH;
 468         cmd.resp_type = MMC_RSP_R1b;
 469         cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
 470                                  (index << 16) |
 471                                  (value << 8);
 472
 473         ret = mmc_send_cmd(mmc, &cmd, NULL);
 474
 475         /* Waiting for the ready status */
 476         if (!ret)
 477                 ret = mmc_send_status(mmc, timeout);
 478
 479         return ret;
 480
 481 }
 482
 483 static int mmc_change_freq(struct mmc *mmc)
 484 {
 485         ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
 486         char cardtype;
 487         int err;
 488
 489         mmc->card_caps = 0;
 490
 491         if (mmc_host_is_spi(mmc))
 492                 return 0;
 493
 494         /* Only version 4 supports high-speed */
 495         if (mmc->version < MMC_VERSION_4)
 496                 return 0;
 497
 498         err = mmc_send_ext_csd(mmc, ext_csd);
 499
 500         if (err)
 501                 return err;
 502
 503         cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
 504
 505         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
 506
 507         if (err)
 508                 return err == SWITCH_ERR ? 0 : err;
 509
 510         /* Now check to see that it worked */
 511         err = mmc_send_ext_csd(mmc, ext_csd);
 512
 513         if (err)
 514                 return err;
 515
 516         /* No high-speed support */
 517         if (!ext_csd[EXT_CSD_HS_TIMING])
 518                 return 0;
 519
 520         /* High Speed is set, there are two types: 52MHz and 26MHz */
 521         if (cardtype & EXT_CSD_CARD_TYPE_52) {
 522                 if (cardtype & EXT_CSD_CARD_TYPE_DDR_52)
 523                         mmc->card_caps |= MMC_MODE_DDR_52MHz;
 524                 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 525         } else {
 526                 mmc->card_caps |= MMC_MODE_HS;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int mmc_set_capacity(struct mmc *mmc, int part_num)
 533 {
 534         switch (part_num) {
 535         case 0:
 536                 mmc->capacity = mmc->capacity_user;
 537                 break;
 538         case 1:
 539         case 2:
 540                 mmc->capacity = mmc->capacity_boot;
 541                 break;
 542         case 3:
 543                 mmc->capacity = mmc->capacity_rpmb;
 544                 break;
 545         case 4:
 546         case 5:
 547         case 6:
 548         case 7:
 549                 mmc->capacity = mmc->capacity_gp[part_num - 4];
 550                 break;
 551         default:
 552                 return -1;
 553         }
 554
 555         mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
 556
 557         return 0;
 558 }
 559
 560 int mmc_select_hwpart(int dev_num, int hwpart)
 561 {
 562         struct mmc *mmc = find_mmc_device(dev_num);
 563         int ret;
 564
 565         if (!mmc)
 566                 return -ENODEV;
 567
 568         if (mmc->part_num == hwpart)
 569                 return 0;
 570
 571         if (mmc->part_config == MMCPART_NOAVAILABLE) {
 572                 printf("Card doesn't support part_switch\n");
 573                 return -EMEDIUMTYPE;
 574         }
 575
 576         ret = mmc_switch_part(dev_num, hwpart);
 577         if (ret)
 578                 return ret;
 579
 580         mmc->part_num = hwpart;
 581
 582         return 0;
 583 }
 584
 585
 586 int mmc_switch_part(int dev_num, unsigned int part_num)
 587 {
 588         struct mmc *mmc = find_mmc_device(dev_num);
 589         int ret;
 590
 591         if (!mmc)
 592                 return -1;
 593
 594         ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
 595                          (mmc->part_config & ~PART_ACCESS_MASK)
 596                          | (part_num & PART_ACCESS_MASK));
 597
 598         /*
 599          * Set the capacity if the switch succeeded or was intended
 600          * to return to representing the raw device.
 601          */
 602         if ((ret == 0) || ((ret == -ENODEV) && (part_num == 0)))
 603                 ret = mmc_set_capacity(mmc, part_num);
 604
 605         return ret;
 606 }
 607
 608 int mmc_getcd(struct mmc *mmc)
 609 {
 610         int cd;
 611
 612         cd = board_mmc_getcd(mmc);
 613
 614         if (cd < 0) {
 615                 if (mmc->cfg->ops->getcd)
 616                         cd = mmc->cfg->ops->getcd(mmc);
 617                 else
 618                         cd = 1;
 619         }
 620
 621         return cd;
 622 }
 623
 624 static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
 625 {
 626         struct mmc_cmd cmd;
 627         struct mmc_data data;
 628
 629         /* Switch the frequency */
 630         cmd.cmdidx = SD_CMD_SWITCH_FUNC;
 631         cmd.resp_type = MMC_RSP_R1;
 632         cmd.cmdarg = (mode << 31) | 0xffffff;
 633         cmd.cmdarg &= ~(0xf << (group * 4));
 634         cmd.cmdarg |= value << (group * 4);
 635
 636         data.dest = (char *)resp;
 637         data.blocksize = 64;
 638         data.blocks = 1;
 639         data.flags = MMC_DATA_READ;
 640
 641         return mmc_send_cmd(mmc, &cmd, &data);
 642 }
 643
 644
 645 static int sd_change_freq(struct mmc *mmc)
 646 {
 647         int err;
 648         struct mmc_cmd cmd;
 649         ALLOC_CACHE_ALIGN_BUFFER(uint, scr, 2);
 650         ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
 651         struct mmc_data data;
 652         int timeout;
 653
 654         mmc->card_caps = 0;
 655
 656         if (mmc_host_is_spi(mmc))
 657                 return 0;
 658
 659         /* Read the SCR to find out if this card supports higher speeds */
 660         cmd.cmdidx = MMC_CMD_APP_CMD;
 661         cmd.resp_type = MMC_RSP_R1;
 662         cmd.cmdarg = mmc->rca << 16;
 663
 664         err = mmc_send_cmd(mmc, &cmd, NULL);
 665
 666         if (err)
 667                 return err;
 668
 669         cmd.cmdidx = SD_CMD_APP_SEND_SCR;
 670         cmd.resp_type = MMC_RSP_R1;
 671         cmd.cmdarg = 0;
 672
 673         timeout = 3;
 674
 675 retry_scr:
 676         data.dest = (char *)scr;
 677         data.blocksize = 8;
 678         data.blocks = 1;
 679         data.flags = MMC_DATA_READ;
 680
 681         err = mmc_send_cmd(mmc, &cmd, &data);
 682
 683         if (err) {
 684                 if (timeout--)
 685                         goto retry_scr;
 686
 687                 return err;
 688         }
 689
 690         mmc->scr[0] = __be32_to_cpu(scr[0]);
 691         mmc->scr[1] = __be32_to_cpu(scr[1]);
 692
 693         switch ((mmc->scr[0] >> 24) & 0xf) {
 694                 case 0:
 695                         mmc->version = SD_VERSION_1_0;
 696                         break;
 697                 case 1:
 698                         mmc->version = SD_VERSION_1_10;
 699                         break;
 700                 case 2:
 701                         mmc->version = SD_VERSION_2;
 702                         if ((mmc->scr[0] >> 15) & 0x1)
 703                                 mmc->version = SD_VERSION_3;
 704                         break;
 705                 default:
 706                         mmc->version = SD_VERSION_1_0;
 707                         break;
 708         }
 709
 710         if (mmc->scr[0] & SD_DATA_4BIT)
 711                 mmc->card_caps |= MMC_MODE_4BIT;
 712
 713         /* Version 1.0 doesn't support switching */
 714         if (mmc->version == SD_VERSION_1_0)
 715                 return 0;
 716
 717         timeout = 4;
 718         while (timeout--) {
 719                 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
 720                                 (u8 *)switch_status);
 721
 722                 if (err)
 723                         return err;
 724
 725                 /* The high-speed function is busy.  Try again */
 726                 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
 727                         break;
 728         }
 729
 730         /* If high-speed isn't supported, we return */
 731         if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
 732                 return 0;
 733
 734         /*
 735          * If the host doesn't support SD_HIGHSPEED, do not switch card to
 736          * HIGHSPEED mode even if the card support SD_HIGHSPPED.
 737          * This can avoid furthur problem when the card runs in different
 738          * mode between the host.
 739          */
 740         if (!((mmc->cfg->host_caps & MMC_MODE_HS_52MHz) &&
 741                 (mmc->cfg->host_caps & MMC_MODE_HS)))
 742                 return 0;
 743
 744         err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
 745
 746         if (err)
 747                 return err;
 748
 749         if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
 750                 mmc->card_caps |= MMC_MODE_HS;
 751
 752         return 0;
 753 }
 754
 755 /* frequency bases */
 756 /* divided by 10 to be nice to platforms without floating point */
 757 static const int fbase[] = {
 758         10000,
 759         100000,
 760         1000000,
 761         10000000,
 762 };
 763
 764 /* Multiplier values for TRAN_SPEED.  Multiplied by 10 to be nice
 765  * to platforms without floating point.
 766  */
 767 static const int multipliers[] = {
 768         0,      /* reserved */
 769         10,
 770         12,
 771         13,
 772         15,
 773         20,
 774         25,
 775         30,
 776         35,
 777         40,
 778         45,
 779         50,
 780         55,
 781         60,
 782         70,
 783         80,
 784 };
 785
 786 static void mmc_set_ios(struct mmc *mmc)
 787 {
 788         if (mmc->cfg->ops->set_ios)
 789                 mmc->cfg->ops->set_ios(mmc);
 790 }
 791
 792 void mmc_set_clock(struct mmc *mmc, uint clock)
 793 {
 794         if (clock > mmc->cfg->f_max)
 795                 clock = mmc->cfg->f_max;
 796
 797         if (clock < mmc->cfg->f_min)
 798                 clock = mmc->cfg->f_min;
 799
 800         mmc->clock = clock;
 801
 802         mmc_set_ios(mmc);
 803 }
 804
 805 static void mmc_set_bus_width(struct mmc *mmc, uint width)
 806 {
 807         mmc->bus_width = width;
 808
 809         mmc_set_ios(mmc);
 810 }
 811
 812 static int mmc_startup(struct mmc *mmc)
 813 {
 814         int err, i;
 815         uint mult, freq;
 816         u64 cmult, csize, capacity;
 817         struct mmc_cmd cmd;
 818         ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
 819         ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
 820         int timeout = 1000;
 821
 822 #ifdef CONFIG_MMC_SPI_CRC_ON
 823         if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
 824                 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
 825                 cmd.resp_type = MMC_RSP_R1;
 826                 cmd.cmdarg = 1;
 827                 err = mmc_send_cmd(mmc, &cmd, NULL);
 828
 829                 if (err)
 830                         return err;
 831         }
 832 #endif
 833
 834         /* Put the Card in Identify Mode */
 835         cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
 836                 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
 837         cmd.resp_type = MMC_RSP_R2;
 838         cmd.cmdarg = 0;
 839
 840         err = mmc_send_cmd(mmc, &cmd, NULL);
 841
 842         if (err)
 843                 return err;
 844
 845         memcpy(mmc->cid, cmd.response, 16);
 846
 847         /*
 848          * For MMC cards, set the Relative Address.
 849          * For SD cards, get the Relatvie Address.
 850          * This also puts the cards into Standby State
 851          */
 852         if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
 853                 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
 854                 cmd.cmdarg = mmc->rca << 16;
 855                 cmd.resp_type = MMC_RSP_R6;
 856
 857                 err = mmc_send_cmd(mmc, &cmd, NULL);
 858
 859                 if (err)
 860                         return err;
 861
 862                 if (IS_SD(mmc))
 863                         mmc->rca = (cmd.response[0] >> 16) & 0xffff;
 864         }
 865
 866         /* Get the Card-Specific Data */
 867         cmd.cmdidx = MMC_CMD_SEND_CSD;
 868         cmd.resp_type = MMC_RSP_R2;
 869         cmd.cmdarg = mmc->rca << 16;
 870
 871         err = mmc_send_cmd(mmc, &cmd, NULL);
 872
 873         /* Waiting for the ready status */
 874         mmc_send_status(mmc, timeout);
 875
 876         if (err)
 877                 return err;
 878
 879         mmc->csd[0] = cmd.response[0];
 880         mmc->csd[1] = cmd.response[1];
 881         mmc->csd[2] = cmd.response[2];
 882         mmc->csd[3] = cmd.response[3];
 883
 884         if (mmc->version == MMC_VERSION_UNKNOWN) {
 885                 int version = (cmd.response[0] >> 26) & 0xf;
 886
 887                 switch (version) {
 888                         case 0:
 889                                 mmc->version = MMC_VERSION_1_2;
 890                                 break;
 891                         case 1:
 892                                 mmc->version = MMC_VERSION_1_4;
 893                                 break;
 894                         case 2:
 895                                 mmc->version = MMC_VERSION_2_2;
 896                                 break;
 897                         case 3:
 898                                 mmc->version = MMC_VERSION_3;
 899                                 break;
 900                         case 4:
 901                                 mmc->version = MMC_VERSION_4;
 902                                 break;
 903                         default:
 904                                 mmc->version = MMC_VERSION_1_2;
 905                                 break;
 906                 }
 907         }
 908
 909         /* divide frequency by 10, since the mults are 10x bigger */
 910         freq = fbase[(cmd.response[0] & 0x7)];
 911         mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
 912
 913         mmc->tran_speed = freq * mult;
 914
 915         mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1);
 916         mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
 917
 918         if (IS_SD(mmc))
 919                 mmc->write_bl_len = mmc->read_bl_len;
 920         else
 921                 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
 922
 923         if (mmc->high_capacity) {
 924                 csize = (mmc->csd[1] & 0x3f) << 16
 925                         | (mmc->csd[2] & 0xffff0000) >> 16;
 926                 cmult = 8;
 927         } else {
 928                 csize = (mmc->csd[1] & 0x3ff) << 2
 929                         | (mmc->csd[2] & 0xc0000000) >> 30;
 930                 cmult = (mmc->csd[2] & 0x00038000) >> 15;
 931         }
 932
 933         mmc->capacity_user = (csize + 1) << (cmult + 2);
 934         mmc->capacity_user *= mmc->read_bl_len;
 935         mmc->capacity_boot = 0;
 936         mmc->capacity_rpmb = 0;
 937         for (i = 0; i < 4; i++)
 938                 mmc->capacity_gp[i] = 0;
 939
 940         if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
 941                 mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
 942
 943         if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
 944                 mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
 945
 946         if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) {
 947                 cmd.cmdidx = MMC_CMD_SET_DSR;
 948                 cmd.cmdarg = (mmc->dsr & 0xffff) << 16;
 949                 cmd.resp_type = MMC_RSP_NONE;
 950                 if (mmc_send_cmd(mmc, &cmd, NULL))
 951                         printf("MMC: SET_DSR failed\n");
 952         }
 953
 954         /* Select the card, and put it into Transfer Mode */
 955         if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
 956                 cmd.cmdidx = MMC_CMD_SELECT_CARD;
 957                 cmd.resp_type = MMC_RSP_R1;
 958                 cmd.cmdarg = mmc->rca << 16;
 959                 err = mmc_send_cmd(mmc, &cmd, NULL);
 960
 961                 if (err)
 962                         return err;
 963         }
 964
 965         /*
 966          * For SD, its erase group is always one sector
 967          */
 968         mmc->erase_grp_size = 1;
 969         mmc->part_config = MMCPART_NOAVAILABLE;
 970         if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
 971                 /* check  ext_csd version and capacity */
 972                 err = mmc_send_ext_csd(mmc, ext_csd);
 973                 if (!err && (ext_csd[EXT_CSD_REV] >= 2)) {
 974                         /*
 975                          * According to the JEDEC Standard, the value of
 976                          * ext_csd's capacity is valid if the value is more
 977                          * than 2GB
 978                          */
 979                         capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
 980                                         | ext_csd[EXT_CSD_SEC_CNT + 1] << 8
 981                                         | ext_csd[EXT_CSD_SEC_CNT + 2] << 16
 982                                         | ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 983                         capacity *= MMC_MAX_BLOCK_LEN;
 984                         if ((capacity >> 20) > 2 * 1024)
 985                                 mmc->capacity_user = capacity;
 986                 }
 987
 988                 switch (ext_csd[EXT_CSD_REV]) {
 989                 case 1:
 990                         mmc->version = MMC_VERSION_4_1;
 991                         break;
 992                 case 2:
 993                         mmc->version = MMC_VERSION_4_2;
 994                         break;
 995                 case 3:
 996                         mmc->version = MMC_VERSION_4_3;
 997                         break;
 998                 case 5:
 999                         mmc->version = MMC_VERSION_4_41;
1000                         break;
1001                 case 6:
1002                         mmc->version = MMC_VERSION_4_5;
1003                         break;
1004                 }
1005
1006                 /*
1007                  * Host needs to enable ERASE_GRP_DEF bit if device is
1008                  * partitioned. This bit will be lost every time after a reset
1009                  * or power off. This will affect erase size.
1010                  */
1011                 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
1012                     (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) {
1013                         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1014                                 EXT_CSD_ERASE_GROUP_DEF, 1);
1015
1016                         if (err)
1017                                 return err;
1018                         else
1019                                 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
1020
1021                         /* Read out group size from ext_csd */
1022                         mmc->erase_grp_size =
1023                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
1024                                         MMC_MAX_BLOCK_LEN * 1024;
1025                 } else {
1026                         /* Calculate the group size from the csd value. */
1027                         int erase_gsz, erase_gmul;
1028                         erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
1029                         erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
1030                         mmc->erase_grp_size = (erase_gsz + 1)
1031                                 * (erase_gmul + 1);
1032                 }
1033
1034                 /* store the partition info of emmc */
1035                 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
1036                     ext_csd[EXT_CSD_BOOT_MULT])
1037                         mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
1038
1039                 mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
1040
1041                 mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17;
1042
1043                 for (i = 0; i < 4; i++) {
1044                         int idx = EXT_CSD_GP_SIZE_MULT + i * 3;
1045                         mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) +
1046                                 (ext_csd[idx + 1] << 8) + ext_csd[idx];
1047                         mmc->capacity_gp[i] *=
1048                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
1049                         mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
1050                 }
1051         }
1052
1053         err = mmc_set_capacity(mmc, mmc->part_num);
1054         if (err)
1055                 return err;
1056
1057         if (IS_SD(mmc))
1058                 err = sd_change_freq(mmc);
1059         else
1060                 err = mmc_change_freq(mmc);
1061
1062         if (err)
1063                 return err;
1064
1065         /* Restrict card's capabilities by what the host can do */
1066         mmc->card_caps &= mmc->cfg->host_caps;
1067
1068         if (IS_SD(mmc)) {
1069                 if (mmc->card_caps & MMC_MODE_4BIT) {
1070                         cmd.cmdidx = MMC_CMD_APP_CMD;
1071                         cmd.resp_type = MMC_RSP_R1;
1072                         cmd.cmdarg = mmc->rca << 16;
1073
1074                         err = mmc_send_cmd(mmc, &cmd, NULL);
1075                         if (err)
1076                                 return err;
1077
1078                         cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1079                         cmd.resp_type = MMC_RSP_R1;
1080                         cmd.cmdarg = 2;
1081                         err = mmc_send_cmd(mmc, &cmd, NULL);
1082                         if (err)
1083                                 return err;
1084
1085                         mmc_set_bus_width(mmc, 4);
1086                 }
1087
1088                 if (mmc->card_caps & MMC_MODE_HS)
1089                         mmc->tran_speed = 50000000;
1090                 else
1091                         mmc->tran_speed = 25000000;
1092         } else {
1093                 int idx;
1094
1095                 /* An array of possible bus widths in order of preference */
1096                 static unsigned ext_csd_bits[] = {
1097                         EXT_CSD_DDR_BUS_WIDTH_8,
1098                         EXT_CSD_DDR_BUS_WIDTH_4,
1099                         EXT_CSD_BUS_WIDTH_8,
1100                         EXT_CSD_BUS_WIDTH_4,
1101                         EXT_CSD_BUS_WIDTH_1,
1102                 };
1103
1104                 /* An array to map CSD bus widths to host cap bits */
1105                 static unsigned ext_to_hostcaps[] = {
1106                         [EXT_CSD_DDR_BUS_WIDTH_4] = MMC_MODE_DDR_52MHz,
1107                         [EXT_CSD_DDR_BUS_WIDTH_8] = MMC_MODE_DDR_52MHz,
1108                         [EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
1109                         [EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
1110                 };
1111
1112                 /* An array to map chosen bus width to an integer */
1113                 static unsigned widths[] = {
1114                         8, 4, 8, 4, 1,
1115                 };
1116
1117                 for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
1118                         unsigned int extw = ext_csd_bits[idx];
1119
1120                         /*
1121                          * Check to make sure the controller supports
1122                          * this bus width, if it's more than 1
1123                          */
1124                         if (extw != EXT_CSD_BUS_WIDTH_1 &&
1125                                         !(mmc->cfg->host_caps & ext_to_hostcaps[extw]))
1126                                 continue;
1127
1128                         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1129                                         EXT_CSD_BUS_WIDTH, extw);
1130
1131                         if (err)
1132                                 continue;
1133
1134                         mmc_set_bus_width(mmc, widths[idx]);
1135
1136                         err = mmc_send_ext_csd(mmc, test_csd);
1137                         /* Only compare read only fields */
1138                         if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
1139                                     == test_csd[EXT_CSD_PARTITIONING_SUPPORT]
1140                                  && ext_csd[EXT_CSD_HC_WP_GRP_SIZE] \
1141                                     == test_csd[EXT_CSD_HC_WP_GRP_SIZE] \
1142                                  && ext_csd[EXT_CSD_REV] \
1143                                     == test_csd[EXT_CSD_REV]
1144                                  && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
1145                                     == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
1146                                  && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
1147                                         &test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
1148
1149                                 mmc->card_caps |= ext_to_hostcaps[extw];
1150                                 break;
1151                         }
1152                 }
1153
1154                 if (mmc->card_caps & MMC_MODE_HS) {
1155                         if (mmc->card_caps & MMC_MODE_HS_52MHz)
1156                                 mmc->tran_speed = 52000000;
1157                         else
1158                                 mmc->tran_speed = 26000000;
1159                 }
1160         }
1161
1162         mmc_set_clock(mmc, mmc->tran_speed);
1163
1164         /* fill in device description */
1165         mmc->block_dev.lun = 0;
1166         mmc->block_dev.type = 0;
1167         mmc->block_dev.blksz = mmc->read_bl_len;
1168         mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz);
1169         mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1170 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1171         sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
1172                 mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
1173                 (mmc->cid[3] >> 16) & 0xffff);
1174         sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
1175                 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1176                 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
1177                 (mmc->cid[2] >> 24) & 0xff);
1178         sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
1179                 (mmc->cid[2] >> 16) & 0xf);
1180 #else
1181         mmc->block_dev.vendor[0] = 0;
1182         mmc->block_dev.product[0] = 0;
1183         mmc->block_dev.revision[0] = 0;
1184 #endif
1185 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
1186         init_part(&mmc->block_dev);
1187 #endif
1188
1189         return 0;
1190 }
1191
1192 static int mmc_send_if_cond(struct mmc *mmc)
1193 {
1194         struct mmc_cmd cmd;
1195         int err;
1196
1197         cmd.cmdidx = SD_CMD_SEND_IF_COND;
1198         /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1199         cmd.cmdarg = ((mmc->cfg->voltages & 0xff8000) != 0) << 8 | 0xaa;
1200         cmd.resp_type = MMC_RSP_R7;
1201
1202         err = mmc_send_cmd(mmc, &cmd, NULL);
1203
1204         if (err)
1205                 return err;
1206
1207         if ((cmd.response[0] & 0xff) != 0xaa)
1208                 return UNUSABLE_ERR;
1209         else
1210                 mmc->version = SD_VERSION_2;
1211
1212         return 0;
1213 }
1214
1215 /* not used any more */
1216 int __deprecated mmc_register(struct mmc *mmc)
1217 {
1218 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1219         printf("%s is deprecated! use mmc_create() instead.\n", __func__);
1220 #endif
1221         return -1;
1222 }
1223
1224 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
1225 {
1226         struct mmc *mmc;
1227
1228         /* quick validation */
1229         if (cfg == NULL || cfg->ops == NULL || cfg->ops->send_cmd == NULL ||
1230                         cfg->f_min == 0 || cfg->f_max == 0 || cfg->b_max == 0)
1231                 return NULL;
1232
1233         mmc = calloc(1, sizeof(*mmc));
1234         if (mmc == NULL)
1235                 return NULL;
1236
1237         mmc->cfg = cfg;
1238         mmc->priv = priv;
1239
1240         /* the following chunk was mmc_register() */
1241
1242         /* Setup dsr related values */
1243         mmc->dsr_imp = 0;
1244         mmc->dsr = 0xffffffff;
1245         /* Setup the universal parts of the block interface just once */
1246         mmc->block_dev.if_type = IF_TYPE_MMC;
1247         mmc->block_dev.dev = cur_dev_num++;
1248         mmc->block_dev.removable = 1;
1249         mmc->block_dev.block_read = mmc_bread;
1250         mmc->block_dev.block_write = mmc_bwrite;
1251         mmc->block_dev.block_erase = mmc_berase;
1252
1253         /* setup initial part type */
1254         mmc->block_dev.part_type = mmc->cfg->part_type;
1255
1256         INIT_LIST_HEAD(&mmc->link);
1257
1258         list_add_tail(&mmc->link, &mmc_devices);
1259
1260         return mmc;
1261 }
1262
1263 void mmc_destroy(struct mmc *mmc)
1264 {
1265         /* only freeing memory for now */
1266         free(mmc);
1267 }
1268
1269 #ifdef CONFIG_PARTITIONS
1270 block_dev_desc_t *mmc_get_dev(int dev)
1271 {
1272         struct mmc *mmc = find_mmc_device(dev);
1273         if (!mmc || mmc_init(mmc))
1274                 return NULL;
1275
1276         return &mmc->block_dev;
1277 }
1278 #endif
1279
1280 /* board-specific MMC power initializations. */
1281 __weak void board_mmc_power_init(void)
1282 {
1283 }
1284
1285 int mmc_start_init(struct mmc *mmc)
1286 {
1287         int err;
1288
1289         /* we pretend there's no card when init is NULL */
1290         if (mmc_getcd(mmc) == 0 || mmc->cfg->ops->init == NULL) {
1291                 mmc->has_init = 0;
1292 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1293                 printf("MMC: no card present\n");
1294 #endif
1295                 return NO_CARD_ERR;
1296         }
1297
1298         if (mmc->has_init)
1299                 return 0;
1300
1301         board_mmc_power_init();
1302
1303         /* made sure it's not NULL earlier */
1304         err = mmc->cfg->ops->init(mmc);
1305
1306         if (err)
1307                 return err;
1308
1309         mmc_set_bus_width(mmc, 1);
1310         mmc_set_clock(mmc, 1);
1311
1312         /* Reset the Card */
1313         err = mmc_go_idle(mmc);
1314
1315         if (err)
1316                 return err;
1317
1318         /* The internal partition reset to user partition(0) at every CMD0*/
1319         mmc->part_num = 0;
1320
1321         /* Test for SD version 2 */
1322         err = mmc_send_if_cond(mmc);
1323
1324         /* Now try to get the SD card's operating condition */
1325         err = sd_send_op_cond(mmc);
1326
1327         /* If the command timed out, we check for an MMC card */
1328         if (err == TIMEOUT) {
1329                 err = mmc_send_op_cond(mmc);
1330
1331                 if (err && err != IN_PROGRESS) {
1332 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1333                         printf("Card did not respond to voltage select!\n");
1334 #endif
1335                         return UNUSABLE_ERR;
1336                 }
1337         }
1338
1339         if (err == IN_PROGRESS)
1340                 mmc->init_in_progress = 1;
1341
1342         return err;
1343 }
1344
1345 static int mmc_complete_init(struct mmc *mmc)
1346 {
1347         int err = 0;
1348
1349         if (mmc->op_cond_pending)
1350                 err = mmc_complete_op_cond(mmc);
1351
1352         if (!err)
1353                 err = mmc_startup(mmc);
1354         if (err)
1355                 mmc->has_init = 0;
1356         else
1357                 mmc->has_init = 1;
1358         mmc->init_in_progress = 0;
1359         return err;
1360 }
1361
1362 int mmc_init(struct mmc *mmc)
1363 {
1364         int err = IN_PROGRESS;
1365         unsigned start;
1366
1367         if (mmc->has_init)
1368                 return 0;
1369
1370         start = get_timer(0);
1371
1372         if (!mmc->init_in_progress)
1373                 err = mmc_start_init(mmc);
1374
1375         if (!err || err == IN_PROGRESS)
1376                 err = mmc_complete_init(mmc);
1377         debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
1378         return err;
1379 }
1380
1381 int mmc_set_dsr(struct mmc *mmc, u16 val)
1382 {
1383         mmc->dsr = val;
1384         return 0;
1385 }
1386
1387 /* CPU-specific MMC initializations */
1388 __weak int cpu_mmc_init(bd_t *bis)
1389 {
1390         return -1;
1391 }
1392
1393 /* board-specific MMC initializations. */
1394 __weak int board_mmc_init(bd_t *bis)
1395 {
1396         return -1;
1397 }
1398
1399 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1400
1401 void print_mmc_devices(char separator)
1402 {
1403         struct mmc *m;
1404         struct list_head *entry;
1405
1406         list_for_each(entry, &mmc_devices) {
1407                 m = list_entry(entry, struct mmc, link);
1408
1409                 printf("%s: %d", m->cfg->name, m->block_dev.dev);
1410
1411                 if (entry->next != &mmc_devices)
1412                         printf("%c ", separator);
1413         }
1414
1415         printf("\n");
1416 }
1417
1418 #else
1419 void print_mmc_devices(char separator) { }
1420 #endif
1421
1422 int get_mmc_num(void)
1423 {
1424         return cur_dev_num;
1425 }
1426
1427 void mmc_set_preinit(struct mmc *mmc, int preinit)
1428 {
1429         mmc->preinit = preinit;
1430 }
1431
1432 static void do_preinit(void)
1433 {
1434         struct mmc *m;
1435         struct list_head *entry;
1436
1437         list_for_each(entry, &mmc_devices) {
1438                 m = list_entry(entry, struct mmc, link);
1439
1440                 if (m->preinit)
1441                         mmc_start_init(m);
1442         }
1443 }
1444
1445
1446 int mmc_initialize(bd_t *bis)
1447 {
1448         INIT_LIST_HEAD (&mmc_devices);
1449         cur_dev_num = 0;
1450
1451         if (board_mmc_init(bis) < 0)
1452                 cpu_mmc_init(bis);
1453
1454 #ifndef CONFIG_SPL_BUILD
1455         print_mmc_devices(',');
1456 #endif
1457
1458         do_preinit();
1459         return 0;
1460 }
1461
1462 #ifdef CONFIG_SUPPORT_EMMC_BOOT
1463 /*
1464  * This function changes the size of boot partition and the size of rpmb
1465  * partition present on EMMC devices.
1466  *
1467  * Input Parameters:
1468  * struct *mmc: pointer for the mmc device strcuture
1469  * bootsize: size of boot partition
1470  * rpmbsize: size of rpmb partition
1471  *
1472  * Returns 0 on success.
1473  */
1474
1475 int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
1476                                 unsigned long rpmbsize)
1477 {
1478         int err;
1479         struct mmc_cmd cmd;
1480
1481         /* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
1482         cmd.cmdidx = MMC_CMD_RES_MAN;
1483         cmd.resp_type = MMC_RSP_R1b;
1484         cmd.cmdarg = MMC_CMD62_ARG1;
1485
1486         err = mmc_send_cmd(mmc, &cmd, NULL);
1487         if (err) {
1488                 debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
1489                 return err;
1490         }
1491
1492         /* Boot partition changing mode */
1493         cmd.cmdidx = MMC_CMD_RES_MAN;
1494         cmd.resp_type = MMC_RSP_R1b;
1495         cmd.cmdarg = MMC_CMD62_ARG2;
1496
1497         err = mmc_send_cmd(mmc, &cmd, NULL);
1498         if (err) {
1499                 debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
1500                 return err;
1501         }
1502         /* boot partition size is multiple of 128KB */
1503         bootsize = (bootsize * 1024) / 128;
1504
1505         /* Arg: boot partition size */
1506         cmd.cmdidx = MMC_CMD_RES_MAN;
1507         cmd.resp_type = MMC_RSP_R1b;
1508         cmd.cmdarg = bootsize;
1509
1510         err = mmc_send_cmd(mmc, &cmd, NULL);
1511         if (err) {
1512                 debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
1513                 return err;
1514         }
1515         /* RPMB partition size is multiple of 128KB */
1516         rpmbsize = (rpmbsize * 1024) / 128;
1517         /* Arg: RPMB partition size */
1518         cmd.cmdidx = MMC_CMD_RES_MAN;
1519         cmd.resp_type = MMC_RSP_R1b;
1520         cmd.cmdarg = rpmbsize;
1521
1522         err = mmc_send_cmd(mmc, &cmd, NULL);
1523         if (err) {
1524                 debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
1525                 return err;
1526         }
1527         return 0;
1528 }
1529
1530 /*
1531  * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
1532  * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
1533  * and BOOT_MODE.
1534  *
1535  * Returns 0 on success.
1536  */
1537 int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
1538 {
1539         int err;
1540
1541         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
1542                          EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
1543                          EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
1544                          EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
1545
1546         if (err)
1547                 return err;
1548         return 0;
1549 }
1550
1551 /*
1552  * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
1553  * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
1554  * PARTITION_ACCESS.
1555  *
1556  * Returns 0 on success.
1557  */
1558 int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
1559 {
1560         int err;
1561
1562         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
1563                          EXT_CSD_BOOT_ACK(ack) |
1564                          EXT_CSD_BOOT_PART_NUM(part_num) |
1565                          EXT_CSD_PARTITION_ACCESS(access));
1566
1567         if (err)
1568                 return err;
1569         return 0;
1570 }
1571
1572 /*
1573  * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
1574  * for enable.  Note that this is a write-once field for non-zero values.
1575  *
1576  * Returns 0 on success.
1577  */
1578 int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
1579 {
1580         return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
1581                           enable);
1582 }
1583 #endif