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                 case 7:
1005                         mmc->version = MMC_VERSION_5_0;
1006                         break;
1007                 }
1008
1009                 /*
1010                  * Host needs to enable ERASE_GRP_DEF bit if device is
1011                  * partitioned. This bit will be lost every time after a reset
1012                  * or power off. This will affect erase size.
1013                  */
1014                 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
1015                     (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) {
1016                         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1017                                 EXT_CSD_ERASE_GROUP_DEF, 1);
1018
1019                         if (err)
1020                                 return err;
1021                         else
1022                                 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
1023
1024                         /* Read out group size from ext_csd */
1025                         mmc->erase_grp_size =
1026                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
1027                                         MMC_MAX_BLOCK_LEN * 1024;
1028                         /*
1029                          * if high capacity and partition setting completed
1030                          * SEC_COUNT is valid even if it is smaller than 2 GiB
1031                          * JEDEC Standard JESD84-B45, 6.2.4
1032                          */
1033                         if (mmc->high_capacity &&
1034                             (ext_csd[EXT_CSD_PARTITION_SETTING] &
1035                              EXT_CSD_PARTITION_SETTING_COMPLETED)) {
1036                                 capacity = (ext_csd[EXT_CSD_SEC_CNT]) |
1037                                         (ext_csd[EXT_CSD_SEC_CNT + 1] << 8) |
1038                                         (ext_csd[EXT_CSD_SEC_CNT + 2] << 16) |
1039                                         (ext_csd[EXT_CSD_SEC_CNT + 3] << 24);
1040                                 capacity *= MMC_MAX_BLOCK_LEN;
1041                                 mmc->capacity_user = capacity;
1042                         }
1043                 } else {
1044                         /* Calculate the group size from the csd value. */
1045                         int erase_gsz, erase_gmul;
1046                         erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
1047                         erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
1048                         mmc->erase_grp_size = (erase_gsz + 1)
1049                                 * (erase_gmul + 1);
1050                 }
1051
1052                 /* store the partition info of emmc */
1053                 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
1054                     ext_csd[EXT_CSD_BOOT_MULT])
1055                         mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
1056
1057                 mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
1058
1059                 mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17;
1060
1061                 for (i = 0; i < 4; i++) {
1062                         int idx = EXT_CSD_GP_SIZE_MULT + i * 3;
1063                         mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) +
1064                                 (ext_csd[idx + 1] << 8) + ext_csd[idx];
1065                         mmc->capacity_gp[i] *=
1066                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
1067                         mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
1068                 }
1069         }
1070
1071         err = mmc_set_capacity(mmc, mmc->part_num);
1072         if (err)
1073                 return err;
1074
1075         if (IS_SD(mmc))
1076                 err = sd_change_freq(mmc);
1077         else
1078                 err = mmc_change_freq(mmc);
1079
1080         if (err)
1081                 return err;
1082
1083         /* Restrict card's capabilities by what the host can do */
1084         mmc->card_caps &= mmc->cfg->host_caps;
1085
1086         if (IS_SD(mmc)) {
1087                 if (mmc->card_caps & MMC_MODE_4BIT) {
1088                         cmd.cmdidx = MMC_CMD_APP_CMD;
1089                         cmd.resp_type = MMC_RSP_R1;
1090                         cmd.cmdarg = mmc->rca << 16;
1091
1092                         err = mmc_send_cmd(mmc, &cmd, NULL);
1093                         if (err)
1094                                 return err;
1095
1096                         cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1097                         cmd.resp_type = MMC_RSP_R1;
1098                         cmd.cmdarg = 2;
1099                         err = mmc_send_cmd(mmc, &cmd, NULL);
1100                         if (err)
1101                                 return err;
1102
1103                         mmc_set_bus_width(mmc, 4);
1104                 }
1105
1106                 if (mmc->card_caps & MMC_MODE_HS)
1107                         mmc->tran_speed = 50000000;
1108                 else
1109                         mmc->tran_speed = 25000000;
1110         } else {
1111                 int idx;
1112
1113                 /* An array of possible bus widths in order of preference */
1114                 static unsigned ext_csd_bits[] = {
1115                         EXT_CSD_DDR_BUS_WIDTH_8,
1116                         EXT_CSD_DDR_BUS_WIDTH_4,
1117                         EXT_CSD_BUS_WIDTH_8,
1118                         EXT_CSD_BUS_WIDTH_4,
1119                         EXT_CSD_BUS_WIDTH_1,
1120                 };
1121
1122                 /* An array to map CSD bus widths to host cap bits */
1123                 static unsigned ext_to_hostcaps[] = {
1124                         [EXT_CSD_DDR_BUS_WIDTH_4] = MMC_MODE_DDR_52MHz,
1125                         [EXT_CSD_DDR_BUS_WIDTH_8] = MMC_MODE_DDR_52MHz,
1126                         [EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
1127                         [EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
1128                 };
1129
1130                 /* An array to map chosen bus width to an integer */
1131                 static unsigned widths[] = {
1132                         8, 4, 8, 4, 1,
1133                 };
1134
1135                 for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
1136                         unsigned int extw = ext_csd_bits[idx];
1137
1138                         /*
1139                          * Check to make sure the controller supports
1140                          * this bus width, if it's more than 1
1141                          */
1142                         if (extw != EXT_CSD_BUS_WIDTH_1 &&
1143                                         !(mmc->cfg->host_caps & ext_to_hostcaps[extw]))
1144                                 continue;
1145
1146                         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1147                                         EXT_CSD_BUS_WIDTH, extw);
1148
1149                         if (err)
1150                                 continue;
1151
1152                         mmc_set_bus_width(mmc, widths[idx]);
1153
1154                         err = mmc_send_ext_csd(mmc, test_csd);
1155                         /* Only compare read only fields */
1156                         if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
1157                                     == test_csd[EXT_CSD_PARTITIONING_SUPPORT]
1158                                  && ext_csd[EXT_CSD_HC_WP_GRP_SIZE] \
1159                                     == test_csd[EXT_CSD_HC_WP_GRP_SIZE] \
1160                                  && ext_csd[EXT_CSD_REV] \
1161                                     == test_csd[EXT_CSD_REV]
1162                                  && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
1163                                     == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
1164                                  && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
1165                                         &test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
1166
1167                                 mmc->card_caps |= ext_to_hostcaps[extw];
1168                                 break;
1169                         }
1170                 }
1171
1172                 if (mmc->card_caps & MMC_MODE_HS) {
1173                         if (mmc->card_caps & MMC_MODE_HS_52MHz)
1174                                 mmc->tran_speed = 52000000;
1175                         else
1176                                 mmc->tran_speed = 26000000;
1177                 }
1178         }
1179
1180         mmc_set_clock(mmc, mmc->tran_speed);
1181
1182         /* fill in device description */
1183         mmc->block_dev.lun = 0;
1184         mmc->block_dev.type = 0;
1185         mmc->block_dev.blksz = mmc->read_bl_len;
1186         mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz);
1187         mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1188 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1189         sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
1190                 mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
1191                 (mmc->cid[3] >> 16) & 0xffff);
1192         sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
1193                 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1194                 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
1195                 (mmc->cid[2] >> 24) & 0xff);
1196         sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
1197                 (mmc->cid[2] >> 16) & 0xf);
1198 #else
1199         mmc->block_dev.vendor[0] = 0;
1200         mmc->block_dev.product[0] = 0;
1201         mmc->block_dev.revision[0] = 0;
1202 #endif
1203 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
1204         init_part(&mmc->block_dev);
1205 #endif
1206
1207         return 0;
1208 }
1209
1210 static int mmc_send_if_cond(struct mmc *mmc)
1211 {
1212         struct mmc_cmd cmd;
1213         int err;
1214
1215         cmd.cmdidx = SD_CMD_SEND_IF_COND;
1216         /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1217         cmd.cmdarg = ((mmc->cfg->voltages & 0xff8000) != 0) << 8 | 0xaa;
1218         cmd.resp_type = MMC_RSP_R7;
1219
1220         err = mmc_send_cmd(mmc, &cmd, NULL);
1221
1222         if (err)
1223                 return err;
1224
1225         if ((cmd.response[0] & 0xff) != 0xaa)
1226                 return UNUSABLE_ERR;
1227         else
1228                 mmc->version = SD_VERSION_2;
1229
1230         return 0;
1231 }
1232
1233 /* not used any more */
1234 int __deprecated mmc_register(struct mmc *mmc)
1235 {
1236 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1237         printf("%s is deprecated! use mmc_create() instead.\n", __func__);
1238 #endif
1239         return -1;
1240 }
1241
1242 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
1243 {
1244         struct mmc *mmc;
1245
1246         /* quick validation */
1247         if (cfg == NULL || cfg->ops == NULL || cfg->ops->send_cmd == NULL ||
1248                         cfg->f_min == 0 || cfg->f_max == 0 || cfg->b_max == 0)
1249                 return NULL;
1250
1251         mmc = calloc(1, sizeof(*mmc));
1252         if (mmc == NULL)
1253                 return NULL;
1254
1255         mmc->cfg = cfg;
1256         mmc->priv = priv;
1257
1258         /* the following chunk was mmc_register() */
1259
1260         /* Setup dsr related values */
1261         mmc->dsr_imp = 0;
1262         mmc->dsr = 0xffffffff;
1263         /* Setup the universal parts of the block interface just once */
1264         mmc->block_dev.if_type = IF_TYPE_MMC;
1265         mmc->block_dev.dev = cur_dev_num++;
1266         mmc->block_dev.removable = 1;
1267         mmc->block_dev.block_read = mmc_bread;
1268         mmc->block_dev.block_write = mmc_bwrite;
1269         mmc->block_dev.block_erase = mmc_berase;
1270
1271         /* setup initial part type */
1272         mmc->block_dev.part_type = mmc->cfg->part_type;
1273
1274         INIT_LIST_HEAD(&mmc->link);
1275
1276         list_add_tail(&mmc->link, &mmc_devices);
1277
1278         return mmc;
1279 }
1280
1281 void mmc_destroy(struct mmc *mmc)
1282 {
1283         /* only freeing memory for now */
1284         free(mmc);
1285 }
1286
1287 #ifdef CONFIG_PARTITIONS
1288 block_dev_desc_t *mmc_get_dev(int dev)
1289 {
1290         struct mmc *mmc = find_mmc_device(dev);
1291         if (!mmc || mmc_init(mmc))
1292                 return NULL;
1293
1294         return &mmc->block_dev;
1295 }
1296 #endif
1297
1298 /* board-specific MMC power initializations. */
1299 __weak void board_mmc_power_init(void)
1300 {
1301 }
1302
1303 int mmc_start_init(struct mmc *mmc)
1304 {
1305         int err;
1306
1307         /* we pretend there's no card when init is NULL */
1308         if (mmc_getcd(mmc) == 0 || mmc->cfg->ops->init == NULL) {
1309                 mmc->has_init = 0;
1310 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1311                 printf("MMC: no card present\n");
1312 #endif
1313                 return NO_CARD_ERR;
1314         }
1315
1316         if (mmc->has_init)
1317                 return 0;
1318
1319         board_mmc_power_init();
1320
1321         /* made sure it's not NULL earlier */
1322         err = mmc->cfg->ops->init(mmc);
1323
1324         if (err)
1325                 return err;
1326
1327         mmc_set_bus_width(mmc, 1);
1328         mmc_set_clock(mmc, 1);
1329
1330         /* Reset the Card */
1331         err = mmc_go_idle(mmc);
1332
1333         if (err)
1334                 return err;
1335
1336         /* The internal partition reset to user partition(0) at every CMD0*/
1337         mmc->part_num = 0;
1338
1339         /* Test for SD version 2 */
1340         err = mmc_send_if_cond(mmc);
1341
1342         /* Now try to get the SD card's operating condition */
1343         err = sd_send_op_cond(mmc);
1344
1345         /* If the command timed out, we check for an MMC card */
1346         if (err == TIMEOUT) {
1347                 err = mmc_send_op_cond(mmc);
1348
1349                 if (err && err != IN_PROGRESS) {
1350 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1351                         printf("Card did not respond to voltage select!\n");
1352 #endif
1353                         return UNUSABLE_ERR;
1354                 }
1355         }
1356
1357         if (err == IN_PROGRESS)
1358                 mmc->init_in_progress = 1;
1359
1360         return err;
1361 }
1362
1363 static int mmc_complete_init(struct mmc *mmc)
1364 {
1365         int err = 0;
1366
1367         if (mmc->op_cond_pending)
1368                 err = mmc_complete_op_cond(mmc);
1369
1370         if (!err)
1371                 err = mmc_startup(mmc);
1372         if (err)
1373                 mmc->has_init = 0;
1374         else
1375                 mmc->has_init = 1;
1376         mmc->init_in_progress = 0;
1377         return err;
1378 }
1379
1380 int mmc_init(struct mmc *mmc)
1381 {
1382         int err = IN_PROGRESS;
1383         unsigned start;
1384
1385         if (mmc->has_init)
1386                 return 0;
1387
1388         start = get_timer(0);
1389
1390         if (!mmc->init_in_progress)
1391                 err = mmc_start_init(mmc);
1392
1393         if (!err || err == IN_PROGRESS)
1394                 err = mmc_complete_init(mmc);
1395         debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
1396         return err;
1397 }
1398
1399 int mmc_set_dsr(struct mmc *mmc, u16 val)
1400 {
1401         mmc->dsr = val;
1402         return 0;
1403 }
1404
1405 /* CPU-specific MMC initializations */
1406 __weak int cpu_mmc_init(bd_t *bis)
1407 {
1408         return -1;
1409 }
1410
1411 /* board-specific MMC initializations. */
1412 __weak int board_mmc_init(bd_t *bis)
1413 {
1414         return -1;
1415 }
1416
1417 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
1418
1419 void print_mmc_devices(char separator)
1420 {
1421         struct mmc *m;
1422         struct list_head *entry;
1423
1424         list_for_each(entry, &mmc_devices) {
1425                 m = list_entry(entry, struct mmc, link);
1426
1427                 printf("%s: %d", m->cfg->name, m->block_dev.dev);
1428
1429                 if (entry->next != &mmc_devices) {
1430                         printf("%c", separator);
1431                         if (separator != '\n')
1432                                 puts (" ");
1433                 }
1434         }
1435
1436         printf("\n");
1437 }
1438
1439 #else
1440 void print_mmc_devices(char separator) { }
1441 #endif
1442
1443 int get_mmc_num(void)
1444 {
1445         return cur_dev_num;
1446 }
1447
1448 void mmc_set_preinit(struct mmc *mmc, int preinit)
1449 {
1450         mmc->preinit = preinit;
1451 }
1452
1453 static void do_preinit(void)
1454 {
1455         struct mmc *m;
1456         struct list_head *entry;
1457
1458         list_for_each(entry, &mmc_devices) {
1459                 m = list_entry(entry, struct mmc, link);
1460
1461                 if (m->preinit)
1462                         mmc_start_init(m);
1463         }
1464 }
1465
1466
1467 int mmc_initialize(bd_t *bis)
1468 {
1469         INIT_LIST_HEAD (&mmc_devices);
1470         cur_dev_num = 0;
1471
1472         if (board_mmc_init(bis) < 0)
1473                 cpu_mmc_init(bis);
1474
1475 #ifndef CONFIG_SPL_BUILD
1476         print_mmc_devices(',');
1477 #endif
1478
1479         do_preinit();
1480         return 0;
1481 }
1482
1483 #ifdef CONFIG_SUPPORT_EMMC_BOOT
1484 /*
1485  * This function changes the size of boot partition and the size of rpmb
1486  * partition present on EMMC devices.
1487  *
1488  * Input Parameters:
1489  * struct *mmc: pointer for the mmc device strcuture
1490  * bootsize: size of boot partition
1491  * rpmbsize: size of rpmb partition
1492  *
1493  * Returns 0 on success.
1494  */
1495
1496 int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
1497                                 unsigned long rpmbsize)
1498 {
1499         int err;
1500         struct mmc_cmd cmd;
1501
1502         /* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
1503         cmd.cmdidx = MMC_CMD_RES_MAN;
1504         cmd.resp_type = MMC_RSP_R1b;
1505         cmd.cmdarg = MMC_CMD62_ARG1;
1506
1507         err = mmc_send_cmd(mmc, &cmd, NULL);
1508         if (err) {
1509                 debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
1510                 return err;
1511         }
1512
1513         /* Boot partition changing mode */
1514         cmd.cmdidx = MMC_CMD_RES_MAN;
1515         cmd.resp_type = MMC_RSP_R1b;
1516         cmd.cmdarg = MMC_CMD62_ARG2;
1517
1518         err = mmc_send_cmd(mmc, &cmd, NULL);
1519         if (err) {
1520                 debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
1521                 return err;
1522         }
1523         /* boot partition size is multiple of 128KB */
1524         bootsize = (bootsize * 1024) / 128;
1525
1526         /* Arg: boot partition size */
1527         cmd.cmdidx = MMC_CMD_RES_MAN;
1528         cmd.resp_type = MMC_RSP_R1b;
1529         cmd.cmdarg = bootsize;
1530
1531         err = mmc_send_cmd(mmc, &cmd, NULL);
1532         if (err) {
1533                 debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
1534                 return err;
1535         }
1536         /* RPMB partition size is multiple of 128KB */
1537         rpmbsize = (rpmbsize * 1024) / 128;
1538         /* Arg: RPMB partition size */
1539         cmd.cmdidx = MMC_CMD_RES_MAN;
1540         cmd.resp_type = MMC_RSP_R1b;
1541         cmd.cmdarg = rpmbsize;
1542
1543         err = mmc_send_cmd(mmc, &cmd, NULL);
1544         if (err) {
1545                 debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
1546                 return err;
1547         }
1548         return 0;
1549 }
1550
1551 /*
1552  * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
1553  * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
1554  * and BOOT_MODE.
1555  *
1556  * Returns 0 on success.
1557  */
1558 int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
1559 {
1560         int err;
1561
1562         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
1563                          EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
1564                          EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
1565                          EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
1566
1567         if (err)
1568                 return err;
1569         return 0;
1570 }
1571
1572 /*
1573  * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
1574  * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
1575  * PARTITION_ACCESS.
1576  *
1577  * Returns 0 on success.
1578  */
1579 int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
1580 {
1581         int err;
1582
1583         err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
1584                          EXT_CSD_BOOT_ACK(ack) |
1585                          EXT_CSD_BOOT_PART_NUM(part_num) |
1586                          EXT_CSD_PARTITION_ACCESS(access));
1587
1588         if (err)
1589                 return err;
1590         return 0;
1591 }
1592
1593 /*
1594  * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
1595  * for enable.  Note that this is a write-once field for non-zero values.
1596  *
1597  * Returns 0 on success.
1598  */
1599 int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
1600 {
1601         return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
1602                           enable);
1603 }
1604 #endif