drivers/mmc/core/mmc.c

   1 /*
   2  *  linux/drivers/mmc/core/mmc.c
   3  *
   4  *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
   5  *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
   6  *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/slab.h>
  15 #include <linux/stat.h>
  16
  17 #include <linux/mmc/host.h>
  18 #include <linux/mmc/card.h>
  19 #include <linux/mmc/mmc.h>
  20
  21 #include "core.h"
  22 #include "bus.h"
  23 #include "mmc_ops.h"
  24 #include "sd_ops.h"
  25
  26 static const unsigned int tran_exp[] = {
  27         10000,          100000,         1000000,        10000000,
  28         0,              0,              0,              0
  29 };
  30
  31 static const unsigned char tran_mant[] = {
  32         0,      10,     12,     13,     15,     20,     25,     30,
  33         35,     40,     45,     50,     55,     60,     70,     80,
  34 };
  35
  36 static const unsigned int tacc_exp[] = {
  37         1,      10,     100,    1000,   10000,  100000, 1000000, 10000000,
  38 };
  39
  40 static const unsigned int tacc_mant[] = {
  41         0,      10,     12,     13,     15,     20,     25,     30,
  42         35,     40,     45,     50,     55,     60,     70,     80,
  43 };
  44
  45 #define UNSTUFF_BITS(resp,start,size)                                   \
  46         ({                                                              \
  47                 const int __size = size;                                \
  48                 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
  49                 const int __off = 3 - ((start) / 32);                   \
  50                 const int __shft = (start) & 31;                        \
  51                 u32 __res;                                              \
  52                                                                         \
  53                 __res = resp[__off] >> __shft;                          \
  54                 if (__size + __shft > 32)                               \
  55                         __res |= resp[__off-1] << ((32 - __shft) % 32); \
  56                 __res & __mask;                                         \
  57         })
  58
  59 /*
  60  * Given the decoded CSD structure, decode the raw CID to our CID structure.
  61  */
  62 static int mmc_decode_cid(struct mmc_card *card)
  63 {
  64         u32 *resp = card->raw_cid;
  65
  66         /*
  67          * The selection of the format here is based upon published
  68          * specs from sandisk and from what people have reported.
  69          */
  70         switch (card->csd.mmca_vsn) {
  71         case 0: /* MMC v1.0 - v1.2 */
  72         case 1: /* MMC v1.4 */
  73                 card->cid.manfid        = UNSTUFF_BITS(resp, 104, 24);
  74                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  75                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  76                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  77                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  78                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  79                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  80                 card->cid.prod_name[6]  = UNSTUFF_BITS(resp, 48, 8);
  81                 card->cid.hwrev         = UNSTUFF_BITS(resp, 44, 4);
  82                 card->cid.fwrev         = UNSTUFF_BITS(resp, 40, 4);
  83                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 24);
  84                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
  85                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
  86                 break;
  87
  88         case 2: /* MMC v2.0 - v2.2 */
  89         case 3: /* MMC v3.1 - v3.3 */
  90         case 4: /* MMC v4 */
  91                 card->cid.manfid        = UNSTUFF_BITS(resp, 120, 8);
  92                 card->cid.oemid         = UNSTUFF_BITS(resp, 104, 16);
  93                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  94                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  95                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  96                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  97                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  98                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  99                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 32);
 100                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 101                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 102                 break;
 103
 104         default:
 105                 pr_err("%s: card has unknown MMCA version %d\n",
 106                         mmc_hostname(card->host), card->csd.mmca_vsn);
 107                 return -EINVAL;
 108         }
 109
 110         return 0;
 111 }
 112
 113 static void mmc_set_erase_size(struct mmc_card *card)
 114 {
 115         if (card->ext_csd.erase_group_def & 1)
 116                 card->erase_size = card->ext_csd.hc_erase_size;
 117         else
 118                 card->erase_size = card->csd.erase_size;
 119
 120         mmc_init_erase(card);
 121 }
 122
 123 /*
 124  * Given a 128-bit response, decode to our card CSD structure.
 125  */
 126 static int mmc_decode_csd(struct mmc_card *card)
 127 {
 128         struct mmc_csd *csd = &card->csd;
 129         unsigned int e, m, a, b;
 130         u32 *resp = card->raw_csd;
 131
 132         /*
 133          * We only understand CSD structure v1.1 and v1.2.
 134          * v1.2 has extra information in bits 15, 11 and 10.
 135          * We also support eMMC v4.4 & v4.41.
 136          */
 137         csd->structure = UNSTUFF_BITS(resp, 126, 2);
 138         if (csd->structure == 0) {
 139                 pr_err("%s: unrecognised CSD structure version %d\n",
 140                         mmc_hostname(card->host), csd->structure);
 141                 return -EINVAL;
 142         }
 143
 144         csd->mmca_vsn    = UNSTUFF_BITS(resp, 122, 4);
 145         m = UNSTUFF_BITS(resp, 115, 4);
 146         e = UNSTUFF_BITS(resp, 112, 3);
 147         csd->tacc_ns     = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
 148         csd->tacc_clks   = UNSTUFF_BITS(resp, 104, 8) * 100;
 149
 150         m = UNSTUFF_BITS(resp, 99, 4);
 151         e = UNSTUFF_BITS(resp, 96, 3);
 152         csd->max_dtr      = tran_exp[e] * tran_mant[m];
 153         csd->cmdclass     = UNSTUFF_BITS(resp, 84, 12);
 154
 155         e = UNSTUFF_BITS(resp, 47, 3);
 156         m = UNSTUFF_BITS(resp, 62, 12);
 157         csd->capacity     = (1 + m) << (e + 2);
 158
 159         csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
 160         csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 161         csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 162         csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
 163         csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 164         csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 165         csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 166
 167         if (csd->write_blkbits >= 9) {
 168                 a = UNSTUFF_BITS(resp, 42, 5);
 169                 b = UNSTUFF_BITS(resp, 37, 5);
 170                 csd->erase_size = (a + 1) * (b + 1);
 171                 csd->erase_size <<= csd->write_blkbits - 9;
 172         }
 173
 174         return 0;
 175 }
 176
 177 /*
 178  * Read extended CSD.
 179  */
 180 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
 181 {
 182         int err;
 183         u8 *ext_csd;
 184
 185         BUG_ON(!card);
 186         BUG_ON(!new_ext_csd);
 187
 188         *new_ext_csd = NULL;
 189
 190         if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
 191                 return 0;
 192
 193         /*
 194          * As the ext_csd is so large and mostly unused, we don't store the
 195          * raw block in mmc_card.
 196          */
 197         ext_csd = kmalloc(512, GFP_KERNEL);
 198         if (!ext_csd) {
 199                 pr_err("%s: could not allocate a buffer to "
 200                         "receive the ext_csd.\n", mmc_hostname(card->host));
 201                 return -ENOMEM;
 202         }
 203
 204         err = mmc_send_ext_csd(card, ext_csd);
 205         if (err) {
 206                 kfree(ext_csd);
 207                 *new_ext_csd = NULL;
 208
 209                 /* If the host or the card can't do the switch,
 210                  * fail more gracefully. */
 211                 if ((err != -EINVAL)
 212                  && (err != -ENOSYS)
 213                  && (err != -EFAULT))
 214                         return err;
 215
 216                 /*
 217                  * High capacity cards should have this "magic" size
 218                  * stored in their CSD.
 219                  */
 220                 if (card->csd.capacity == (4096 * 512)) {
 221                         pr_err("%s: unable to read EXT_CSD "
 222                                 "on a possible high capacity card. "
 223                                 "Card will be ignored.\n",
 224                                 mmc_hostname(card->host));
 225                 } else {
 226                         pr_warning("%s: unable to read "
 227                                 "EXT_CSD, performance might "
 228                                 "suffer.\n",
 229                                 mmc_hostname(card->host));
 230                         err = 0;
 231                 }
 232         } else
 233                 *new_ext_csd = ext_csd;
 234
 235         return err;
 236 }
 237
 238 static void mmc_select_card_type(struct mmc_card *card)
 239 {
 240         struct mmc_host *host = card->host;
 241         u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
 242         u32 caps = host->caps, caps2 = host->caps2;
 243         unsigned int hs_max_dtr = 0;
 244
 245         if (card_type & EXT_CSD_CARD_TYPE_26)
 246                 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
 247
 248         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 249                         card_type & EXT_CSD_CARD_TYPE_52)
 250                 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
 251
 252         if ((caps & MMC_CAP_1_8V_DDR &&
 253                         card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
 254             (caps & MMC_CAP_1_2V_DDR &&
 255                         card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
 256                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 257
 258         if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
 259                         card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
 260             (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
 261                         card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
 262                 hs_max_dtr = MMC_HS200_MAX_DTR;
 263
 264         card->ext_csd.hs_max_dtr = hs_max_dtr;
 265         card->ext_csd.card_type = card_type;
 266 }
 267
 268 /*
 269  * Decode extended CSD.
 270  */
 271 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 272 {
 273         int err = 0, idx;
 274         unsigned int part_size;
 275         u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
 276
 277         BUG_ON(!card);
 278
 279         if (!ext_csd)
 280                 return 0;
 281
 282         /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 283         card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
 284         if (card->csd.structure == 3) {
 285                 if (card->ext_csd.raw_ext_csd_structure > 2) {
 286                         pr_err("%s: unrecognised EXT_CSD structure "
 287                                 "version %d\n", mmc_hostname(card->host),
 288                                         card->ext_csd.raw_ext_csd_structure);
 289                         err = -EINVAL;
 290                         goto out;
 291                 }
 292         }
 293
 294         card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 295         if (card->ext_csd.rev > 6) {
 296                 pr_err("%s: unrecognised EXT_CSD revision %d\n",
 297                         mmc_hostname(card->host), card->ext_csd.rev);
 298                 err = -EINVAL;
 299                 goto out;
 300         }
 301
 302         card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 303         card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
 304         card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
 305         card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
 306         if (card->ext_csd.rev >= 2) {
 307                 card->ext_csd.sectors =
 308                         ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
 309                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
 310                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
 311                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 312
 313                 /* Cards with density > 2GiB are sector addressed */
 314                 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
 315                         mmc_card_set_blockaddr(card);
 316         }
 317
 318         card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 319         mmc_select_card_type(card);
 320
 321         card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
 322         card->ext_csd.raw_erase_timeout_mult =
 323                 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 324         card->ext_csd.raw_hc_erase_grp_size =
 325                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 326         if (card->ext_csd.rev >= 3) {
 327                 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
 328                 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
 329
 330                 /* EXT_CSD value is in units of 10ms, but we store in ms */
 331                 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 332
 333                 /* Sleep / awake timeout in 100ns units */
 334                 if (sa_shift > 0 && sa_shift <= 0x17)
 335                         card->ext_csd.sa_timeout =
 336                                         1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
 337                 card->ext_csd.erase_group_def =
 338                         ext_csd[EXT_CSD_ERASE_GROUP_DEF];
 339                 card->ext_csd.hc_erase_timeout = 300 *
 340                         ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 341                 card->ext_csd.hc_erase_size =
 342                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
 343
 344                 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
 345
 346                 /*
 347                  * There are two boot regions of equal size, defined in
 348                  * multiples of 128K.
 349                  */
 350                 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
 351                         for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
 352                                 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 353                                 mmc_part_add(card, part_size,
 354                                         EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
 355                                         "boot%d", idx, true,
 356                                         MMC_BLK_DATA_AREA_BOOT);
 357                         }
 358                 }
 359         }
 360
 361         card->ext_csd.raw_hc_erase_gap_size =
 362                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 363         card->ext_csd.raw_sec_trim_mult =
 364                 ext_csd[EXT_CSD_SEC_TRIM_MULT];
 365         card->ext_csd.raw_sec_erase_mult =
 366                 ext_csd[EXT_CSD_SEC_ERASE_MULT];
 367         card->ext_csd.raw_sec_feature_support =
 368                 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 369         card->ext_csd.raw_trim_mult =
 370                 ext_csd[EXT_CSD_TRIM_MULT];
 371         if (card->ext_csd.rev >= 4) {
 372                 /*
 373                  * Enhanced area feature support -- check whether the eMMC
 374                  * card has the Enhanced area enabled.  If so, export enhanced
 375                  * area offset and size to user by adding sysfs interface.
 376                  */
 377                 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 378                 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
 379                     (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
 380                         hc_erase_grp_sz =
 381                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 382                         hc_wp_grp_sz =
 383                                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 384
 385                         card->ext_csd.enhanced_area_en = 1;
 386                         /*
 387                          * calculate the enhanced data area offset, in bytes
 388                          */
 389                         card->ext_csd.enhanced_area_offset =
 390                                 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
 391                                 (ext_csd[137] << 8) + ext_csd[136];
 392                         if (mmc_card_blockaddr(card))
 393                                 card->ext_csd.enhanced_area_offset <<= 9;
 394                         /*
 395                          * calculate the enhanced data area size, in kilobytes
 396                          */
 397                         card->ext_csd.enhanced_area_size =
 398                                 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
 399                                 ext_csd[140];
 400                         card->ext_csd.enhanced_area_size *=
 401                                 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
 402                         card->ext_csd.enhanced_area_size <<= 9;
 403                 } else {
 404                         /*
 405                          * If the enhanced area is not enabled, disable these
 406                          * device attributes.
 407                          */
 408                         card->ext_csd.enhanced_area_offset = -EINVAL;
 409                         card->ext_csd.enhanced_area_size = -EINVAL;
 410                 }
 411
 412                 /*
 413                  * General purpose partition feature support --
 414                  * If ext_csd has the size of general purpose partitions,
 415                  * set size, part_cfg, partition name in mmc_part.
 416                  */
 417                 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
 418                         EXT_CSD_PART_SUPPORT_PART_EN) {
 419                         if (card->ext_csd.enhanced_area_en != 1) {
 420                                 hc_erase_grp_sz =
 421                                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 422                                 hc_wp_grp_sz =
 423                                         ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 424
 425                                 card->ext_csd.enhanced_area_en = 1;
 426                         }
 427
 428                         for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
 429                                 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
 430                                 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
 431                                 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
 432                                         continue;
 433                                 part_size =
 434                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
 435                                         << 16) +
 436                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
 437                                         << 8) +
 438                                 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
 439                                 part_size *= (size_t)(hc_erase_grp_sz *
 440                                         hc_wp_grp_sz);
 441                                 mmc_part_add(card, part_size << 19,
 442                                         EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
 443                                         "gp%d", idx, false,
 444                                         MMC_BLK_DATA_AREA_GP);
 445                         }
 446                 }
 447                 card->ext_csd.sec_trim_mult =
 448                         ext_csd[EXT_CSD_SEC_TRIM_MULT];
 449                 card->ext_csd.sec_erase_mult =
 450                         ext_csd[EXT_CSD_SEC_ERASE_MULT];
 451                 card->ext_csd.sec_feature_support =
 452                         ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 453                 card->ext_csd.trim_timeout = 300 *
 454                         ext_csd[EXT_CSD_TRIM_MULT];
 455
 456                 /*
 457                  * Note that the call to mmc_part_add above defaults to read
 458                  * only. If this default assumption is changed, the call must
 459                  * take into account the value of boot_locked below.
 460                  */
 461                 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
 462                 card->ext_csd.boot_ro_lockable = true;
 463         }
 464
 465         if (card->ext_csd.rev >= 5) {
 466                 /* check whether the eMMC card supports BKOPS */
 467                 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 468                         card->ext_csd.bkops = 1;
 469                         card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
 470                         card->ext_csd.raw_bkops_status =
 471                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 472                         if (!card->ext_csd.bkops_en)
 473                                 pr_info("%s: BKOPS_EN bit is not set\n",
 474                                         mmc_hostname(card->host));
 475                 }
 476
 477                 /* check whether the eMMC card supports HPI */
 478                 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
 479                         card->ext_csd.hpi = 1;
 480                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 481                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 482                         else
 483                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 484                         /*
 485                          * Indicate the maximum timeout to close
 486                          * a command interrupted by HPI
 487                          */
 488                         card->ext_csd.out_of_int_time =
 489                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 490                 }
 491
 492                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 493                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 494
 495                 /*
 496                  * RPMB regions are defined in multiples of 128K.
 497                  */
 498                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 499                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 500                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 501                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 502                                 "rpmb", 0, false,
 503                                 MMC_BLK_DATA_AREA_RPMB);
 504                 }
 505         }
 506
 507         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 508         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 509                 card->erased_byte = 0xFF;
 510         else
 511                 card->erased_byte = 0x0;
 512
 513         /* eMMC v4.5 or later */
 514         if (card->ext_csd.rev >= 6) {
 515                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 516
 517                 card->ext_csd.generic_cmd6_time = 10 *
 518                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 519                 card->ext_csd.power_off_longtime = 10 *
 520                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 521
 522                 card->ext_csd.cache_size =
 523                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 524                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 525                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 526                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 527
 528                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 529                         card->ext_csd.data_sector_size = 4096;
 530                 else
 531                         card->ext_csd.data_sector_size = 512;
 532
 533                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 534                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 535                         card->ext_csd.data_tag_unit_size =
 536                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 537                         (card->ext_csd.data_sector_size);
 538                 } else {
 539                         card->ext_csd.data_tag_unit_size = 0;
 540                 }
 541         } else {
 542                 card->ext_csd.data_sector_size = 512;
 543         }
 544
 545 out:
 546         return err;
 547 }
 548
 549 static inline void mmc_free_ext_csd(u8 *ext_csd)
 550 {
 551         kfree(ext_csd);
 552 }
 553
 554
 555 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 556 {
 557         u8 *bw_ext_csd;
 558         int err;
 559
 560         if (bus_width == MMC_BUS_WIDTH_1)
 561                 return 0;
 562
 563         err = mmc_get_ext_csd(card, &bw_ext_csd);
 564
 565         if (err || bw_ext_csd == NULL) {
 566                 err = -EINVAL;
 567                 goto out;
 568         }
 569
 570         /* only compare read only fields */
 571         err = !((card->ext_csd.raw_partition_support ==
 572                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 573                 (card->ext_csd.raw_erased_mem_count ==
 574                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 575                 (card->ext_csd.rev ==
 576                         bw_ext_csd[EXT_CSD_REV]) &&
 577                 (card->ext_csd.raw_ext_csd_structure ==
 578                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 579                 (card->ext_csd.raw_card_type ==
 580                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 581                 (card->ext_csd.raw_s_a_timeout ==
 582                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 583                 (card->ext_csd.raw_hc_erase_gap_size ==
 584                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 585                 (card->ext_csd.raw_erase_timeout_mult ==
 586                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 587                 (card->ext_csd.raw_hc_erase_grp_size ==
 588                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 589                 (card->ext_csd.raw_sec_trim_mult ==
 590                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 591                 (card->ext_csd.raw_sec_erase_mult ==
 592                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 593                 (card->ext_csd.raw_sec_feature_support ==
 594                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 595                 (card->ext_csd.raw_trim_mult ==
 596                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 597                 (card->ext_csd.raw_sectors[0] ==
 598                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 599                 (card->ext_csd.raw_sectors[1] ==
 600                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 601                 (card->ext_csd.raw_sectors[2] ==
 602                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 603                 (card->ext_csd.raw_sectors[3] ==
 604                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
 605         if (err)
 606                 err = -EINVAL;
 607
 608 out:
 609         mmc_free_ext_csd(bw_ext_csd);
 610         return err;
 611 }
 612
 613 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 614         card->raw_cid[2], card->raw_cid[3]);
 615 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 616         card->raw_csd[2], card->raw_csd[3]);
 617 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 618 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 619 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 620 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
 621 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 622 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 623 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 624 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 625 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 626 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 627                 card->ext_csd.enhanced_area_offset);
 628 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 629 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 630 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 631
 632 static struct attribute *mmc_std_attrs[] = {
 633         &dev_attr_cid.attr,
 634         &dev_attr_csd.attr,
 635         &dev_attr_date.attr,
 636         &dev_attr_erase_size.attr,
 637         &dev_attr_preferred_erase_size.attr,
 638         &dev_attr_fwrev.attr,
 639         &dev_attr_hwrev.attr,
 640         &dev_attr_manfid.attr,
 641         &dev_attr_name.attr,
 642         &dev_attr_oemid.attr,
 643         &dev_attr_serial.attr,
 644         &dev_attr_enhanced_area_offset.attr,
 645         &dev_attr_enhanced_area_size.attr,
 646         &dev_attr_raw_rpmb_size_mult.attr,
 647         &dev_attr_rel_sectors.attr,
 648         NULL,
 649 };
 650
 651 static struct attribute_group mmc_std_attr_group = {
 652         .attrs = mmc_std_attrs,
 653 };
 654
 655 static const struct attribute_group *mmc_attr_groups[] = {
 656         &mmc_std_attr_group,
 657         NULL,
 658 };
 659
 660 static struct device_type mmc_type = {
 661         .groups = mmc_attr_groups,
 662 };
 663
 664 /*
 665  * Select the PowerClass for the current bus width
 666  * If power class is defined for 4/8 bit bus in the
 667  * extended CSD register, select it by executing the
 668  * mmc_switch command.
 669  */
 670 static int mmc_select_powerclass(struct mmc_card *card,
 671                 unsigned int bus_width, u8 *ext_csd)
 672 {
 673         int err = 0;
 674         unsigned int pwrclass_val;
 675         unsigned int index = 0;
 676         struct mmc_host *host;
 677
 678         BUG_ON(!card);
 679
 680         host = card->host;
 681         BUG_ON(!host);
 682
 683         if (ext_csd == NULL)
 684                 return 0;
 685
 686         /* Power class selection is supported for versions >= 4.0 */
 687         if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
 688                 return 0;
 689
 690         /* Power class values are defined only for 4/8 bit bus */
 691         if (bus_width == EXT_CSD_BUS_WIDTH_1)
 692                 return 0;
 693
 694         switch (1 << host->ios.vdd) {
 695         case MMC_VDD_165_195:
 696                 if (host->ios.clock <= 26000000)
 697                         index = EXT_CSD_PWR_CL_26_195;
 698                 else if (host->ios.clock <= 52000000)
 699                         index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 700                                 EXT_CSD_PWR_CL_52_195 :
 701                                 EXT_CSD_PWR_CL_DDR_52_195;
 702                 else if (host->ios.clock <= 200000000)
 703                         index = EXT_CSD_PWR_CL_200_195;
 704                 break;
 705         case MMC_VDD_27_28:
 706         case MMC_VDD_28_29:
 707         case MMC_VDD_29_30:
 708         case MMC_VDD_30_31:
 709         case MMC_VDD_31_32:
 710         case MMC_VDD_32_33:
 711         case MMC_VDD_33_34:
 712         case MMC_VDD_34_35:
 713         case MMC_VDD_35_36:
 714                 if (host->ios.clock <= 26000000)
 715                         index = EXT_CSD_PWR_CL_26_360;
 716                 else if (host->ios.clock <= 52000000)
 717                         index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 718                                 EXT_CSD_PWR_CL_52_360 :
 719                                 EXT_CSD_PWR_CL_DDR_52_360;
 720                 else if (host->ios.clock <= 200000000)
 721                         index = EXT_CSD_PWR_CL_200_360;
 722                 break;
 723         default:
 724                 pr_warning("%s: Voltage range not supported "
 725                            "for power class.\n", mmc_hostname(host));
 726                 return -EINVAL;
 727         }
 728
 729         pwrclass_val = ext_csd[index];
 730
 731         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 732                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 733                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 734         else
 735                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 736                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 737
 738         /* If the power class is different from the default value */
 739         if (pwrclass_val > 0) {
 740                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 741                                  EXT_CSD_POWER_CLASS,
 742                                  pwrclass_val,
 743                                  card->ext_csd.generic_cmd6_time);
 744         }
 745
 746         return err;
 747 }
 748
 749 /*
 750  * Selects the desired buswidth and switch to the HS200 mode
 751  * if bus width set without error
 752  */
 753 static int mmc_select_hs200(struct mmc_card *card)
 754 {
 755         int idx, err = -EINVAL;
 756         struct mmc_host *host;
 757         static unsigned ext_csd_bits[] = {
 758                 EXT_CSD_BUS_WIDTH_4,
 759                 EXT_CSD_BUS_WIDTH_8,
 760         };
 761         static unsigned bus_widths[] = {
 762                 MMC_BUS_WIDTH_4,
 763                 MMC_BUS_WIDTH_8,
 764         };
 765
 766         BUG_ON(!card);
 767
 768         host = card->host;
 769
 770         if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
 771                         host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
 772                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0);
 773
 774         if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
 775                         host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
 776                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 0);
 777
 778         /* If fails try again during next card power cycle */
 779         if (err)
 780                 goto err;
 781
 782         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
 783
 784         /*
 785          * Unlike SD, MMC cards dont have a configuration register to notify
 786          * supported bus width. So bus test command should be run to identify
 787          * the supported bus width or compare the ext csd values of current
 788          * bus width and ext csd values of 1 bit mode read earlier.
 789          */
 790         for (; idx >= 0; idx--) {
 791
 792                 /*
 793                  * Host is capable of 8bit transfer, then switch
 794                  * the device to work in 8bit transfer mode. If the
 795                  * mmc switch command returns error then switch to
 796                  * 4bit transfer mode. On success set the corresponding
 797                  * bus width on the host.
 798                  */
 799                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 800                                  EXT_CSD_BUS_WIDTH,
 801                                  ext_csd_bits[idx],
 802                                  card->ext_csd.generic_cmd6_time);
 803                 if (err)
 804                         continue;
 805
 806                 mmc_set_bus_width(card->host, bus_widths[idx]);
 807
 808                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
 809                         err = mmc_compare_ext_csds(card, bus_widths[idx]);
 810                 else
 811                         err = mmc_bus_test(card, bus_widths[idx]);
 812                 if (!err)
 813                         break;
 814         }
 815
 816         /* switch to HS200 mode if bus width set successfully */
 817         if (!err)
 818                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 819                                  EXT_CSD_HS_TIMING, 2, 0);
 820 err:
 821         return err;
 822 }
 823
 824 /*
 825  * Handle the detection and initialisation of a card.
 826  *
 827  * In the case of a resume, "oldcard" will contain the card
 828  * we're trying to reinitialise.
 829  */
 830 static int mmc_init_card(struct mmc_host *host, u32 ocr,
 831         struct mmc_card *oldcard)
 832 {
 833         struct mmc_card *card;
 834         int err, ddr = 0;
 835         u32 cid[4];
 836         unsigned int max_dtr;
 837         u32 rocr;
 838         u8 *ext_csd = NULL;
 839
 840         BUG_ON(!host);
 841         WARN_ON(!host->claimed);
 842
 843         /* Set correct bus mode for MMC before attempting init */
 844         if (!mmc_host_is_spi(host))
 845                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
 846
 847         /*
 848          * Since we're changing the OCR value, we seem to
 849          * need to tell some cards to go back to the idle
 850          * state.  We wait 1ms to give cards time to
 851          * respond.
 852          * mmc_go_idle is needed for eMMC that are asleep
 853          */
 854         mmc_go_idle(host);
 855
 856         /* The extra bit indicates that we support high capacity */
 857         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
 858         if (err)
 859                 goto err;
 860
 861         /*
 862          * For SPI, enable CRC as appropriate.
 863          */
 864         if (mmc_host_is_spi(host)) {
 865                 err = mmc_spi_set_crc(host, use_spi_crc);
 866                 if (err)
 867                         goto err;
 868         }
 869
 870         /*
 871          * Fetch CID from card.
 872          */
 873         if (mmc_host_is_spi(host))
 874                 err = mmc_send_cid(host, cid);
 875         else
 876                 err = mmc_all_send_cid(host, cid);
 877         if (err)
 878                 goto err;
 879
 880         if (oldcard) {
 881                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
 882                         err = -ENOENT;
 883                         goto err;
 884                 }
 885
 886                 card = oldcard;
 887         } else {
 888                 /*
 889                  * Allocate card structure.
 890                  */
 891                 card = mmc_alloc_card(host, &mmc_type);
 892                 if (IS_ERR(card)) {
 893                         err = PTR_ERR(card);
 894                         goto err;
 895                 }
 896
 897                 card->type = MMC_TYPE_MMC;
 898                 card->rca = 1;
 899                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
 900         }
 901
 902         /*
 903          * For native busses:  set card RCA and quit open drain mode.
 904          */
 905         if (!mmc_host_is_spi(host)) {
 906                 err = mmc_set_relative_addr(card);
 907                 if (err)
 908                         goto free_card;
 909
 910                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
 911         }
 912
 913         if (!oldcard) {
 914                 /*
 915                  * Fetch CSD from card.
 916                  */
 917                 err = mmc_send_csd(card, card->raw_csd);
 918                 if (err)
 919                         goto free_card;
 920
 921                 err = mmc_decode_csd(card);
 922                 if (err)
 923                         goto free_card;
 924                 err = mmc_decode_cid(card);
 925                 if (err)
 926                         goto free_card;
 927         }
 928
 929         /*
 930          * Select card, as all following commands rely on that.
 931          */
 932         if (!mmc_host_is_spi(host)) {
 933                 err = mmc_select_card(card);
 934                 if (err)
 935                         goto free_card;
 936         }
 937
 938         if (!oldcard) {
 939                 /*
 940                  * Fetch and process extended CSD.
 941                  */
 942
 943                 err = mmc_get_ext_csd(card, &ext_csd);
 944                 if (err)
 945                         goto free_card;
 946                 err = mmc_read_ext_csd(card, ext_csd);
 947                 if (err)
 948                         goto free_card;
 949
 950                 /* If doing byte addressing, check if required to do sector
 951                  * addressing.  Handle the case of <2GB cards needing sector
 952                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
 953                  * ocr register has bit 30 set for sector addressing.
 954                  */
 955                 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
 956                         mmc_card_set_blockaddr(card);
 957
 958                 /* Erase size depends on CSD and Extended CSD */
 959                 mmc_set_erase_size(card);
 960         }
 961
 962         /*
 963          * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
 964          * bit.  This bit will be lost every time after a reset or power off.
 965          */
 966         if (card->ext_csd.enhanced_area_en ||
 967             (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
 968                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 969                                  EXT_CSD_ERASE_GROUP_DEF, 1,
 970                                  card->ext_csd.generic_cmd6_time);
 971
 972                 if (err && err != -EBADMSG)
 973                         goto free_card;
 974
 975                 if (err) {
 976                         err = 0;
 977                         /*
 978                          * Just disable enhanced area off & sz
 979                          * will try to enable ERASE_GROUP_DEF
 980                          * during next time reinit
 981                          */
 982                         card->ext_csd.enhanced_area_offset = -EINVAL;
 983                         card->ext_csd.enhanced_area_size = -EINVAL;
 984                 } else {
 985                         card->ext_csd.erase_group_def = 1;
 986                         /*
 987                          * enable ERASE_GRP_DEF successfully.
 988                          * This will affect the erase size, so
 989                          * here need to reset erase size
 990                          */
 991                         mmc_set_erase_size(card);
 992                 }
 993         }
 994
 995         /*
 996          * Ensure eMMC user default partition is enabled
 997          */
 998         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
 999                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1000                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1001                                  card->ext_csd.part_config,
1002                                  card->ext_csd.part_time);
1003                 if (err && err != -EBADMSG)
1004                         goto free_card;
1005         }
1006
1007         /*
1008          * If the host supports the power_off_notify capability then
1009          * set the notification byte in the ext_csd register of device
1010          */
1011         if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
1012             (card->ext_csd.rev >= 6)) {
1013                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1014                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1015                                  EXT_CSD_POWER_ON,
1016                                  card->ext_csd.generic_cmd6_time);
1017                 if (err && err != -EBADMSG)
1018                         goto free_card;
1019
1020                 /*
1021                  * The err can be -EBADMSG or 0,
1022                  * so check for success and update the flag
1023                  */
1024                 if (!err)
1025                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1026         }
1027
1028         /*
1029          * Activate high speed (if supported)
1030          */
1031         if (card->ext_csd.hs_max_dtr != 0) {
1032                 err = 0;
1033                 if (card->ext_csd.hs_max_dtr > 52000000 &&
1034                     host->caps2 & MMC_CAP2_HS200)
1035                         err = mmc_select_hs200(card);
1036                 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1037                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1038                                          EXT_CSD_HS_TIMING, 1,
1039                                          card->ext_csd.generic_cmd6_time);
1040
1041                 if (err && err != -EBADMSG)
1042                         goto free_card;
1043
1044                 if (err) {
1045                         pr_warning("%s: switch to highspeed failed\n",
1046                                mmc_hostname(card->host));
1047                         err = 0;
1048                 } else {
1049                         if (card->ext_csd.hs_max_dtr > 52000000 &&
1050                             host->caps2 & MMC_CAP2_HS200) {
1051                                 mmc_card_set_hs200(card);
1052                                 mmc_set_timing(card->host,
1053                                                MMC_TIMING_MMC_HS200);
1054                         } else {
1055                                 mmc_card_set_highspeed(card);
1056                                 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1057                         }
1058                 }
1059         }
1060
1061         /*
1062          * Compute bus speed.
1063          */
1064         max_dtr = (unsigned int)-1;
1065
1066         if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1067                 if (max_dtr > card->ext_csd.hs_max_dtr)
1068                         max_dtr = card->ext_csd.hs_max_dtr;
1069                 if (mmc_card_highspeed(card) && (max_dtr > 52000000))
1070                         max_dtr = 52000000;
1071         } else if (max_dtr > card->csd.max_dtr) {
1072                 max_dtr = card->csd.max_dtr;
1073         }
1074
1075         mmc_set_clock(host, max_dtr);
1076
1077         /*
1078          * Indicate DDR mode (if supported).
1079          */
1080         if (mmc_card_highspeed(card)) {
1081                 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1082                         && ((host->caps & (MMC_CAP_1_8V_DDR |
1083                              MMC_CAP_UHS_DDR50))
1084                                 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
1085                                 ddr = MMC_1_8V_DDR_MODE;
1086                 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1087                         && ((host->caps & (MMC_CAP_1_2V_DDR |
1088                              MMC_CAP_UHS_DDR50))
1089                                 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
1090                                 ddr = MMC_1_2V_DDR_MODE;
1091         }
1092
1093         /*
1094          * Indicate HS200 SDR mode (if supported).
1095          */
1096         if (mmc_card_hs200(card)) {
1097                 u32 ext_csd_bits;
1098                 u32 bus_width = card->host->ios.bus_width;
1099
1100                 /*
1101                  * For devices supporting HS200 mode, the bus width has
1102                  * to be set before executing the tuning function. If
1103                  * set before tuning, then device will respond with CRC
1104                  * errors for responses on CMD line. So for HS200 the
1105                  * sequence will be
1106                  * 1. set bus width 4bit / 8 bit (1 bit not supported)
1107                  * 2. switch to HS200 mode
1108                  * 3. set the clock to > 52Mhz <=200MHz and
1109                  * 4. execute tuning for HS200
1110                  */
1111                 if ((host->caps2 & MMC_CAP2_HS200) &&
1112                     card->host->ops->execute_tuning) {
1113                         mmc_host_clk_hold(card->host);
1114                         err = card->host->ops->execute_tuning(card->host,
1115                                 MMC_SEND_TUNING_BLOCK_HS200);
1116                         mmc_host_clk_release(card->host);
1117                 }
1118                 if (err) {
1119                         pr_warning("%s: tuning execution failed\n",
1120                                    mmc_hostname(card->host));
1121                         goto err;
1122                 }
1123
1124                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1125                                 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1126                 err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
1127                 if (err)
1128                         pr_warning("%s: power class selection to bus width %d"
1129                                    " failed\n", mmc_hostname(card->host),
1130                                    1 << bus_width);
1131         }
1132
1133         /*
1134          * Activate wide bus and DDR (if supported).
1135          */
1136         if (!mmc_card_hs200(card) &&
1137             (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1138             (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1139                 static unsigned ext_csd_bits[][2] = {
1140                         { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1141                         { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1142                         { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1143                 };
1144                 static unsigned bus_widths[] = {
1145                         MMC_BUS_WIDTH_8,
1146                         MMC_BUS_WIDTH_4,
1147                         MMC_BUS_WIDTH_1
1148                 };
1149                 unsigned idx, bus_width = 0;
1150
1151                 if (host->caps & MMC_CAP_8_BIT_DATA)
1152                         idx = 0;
1153                 else
1154                         idx = 1;
1155                 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1156                         bus_width = bus_widths[idx];
1157                         if (bus_width == MMC_BUS_WIDTH_1)
1158                                 ddr = 0; /* no DDR for 1-bit width */
1159                         err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
1160                                                     ext_csd);
1161                         if (err)
1162                                 pr_warning("%s: power class selection to "
1163                                            "bus width %d failed\n",
1164                                            mmc_hostname(card->host),
1165                                            1 << bus_width);
1166
1167                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1168                                          EXT_CSD_BUS_WIDTH,
1169                                          ext_csd_bits[idx][0],
1170                                          card->ext_csd.generic_cmd6_time);
1171                         if (!err) {
1172                                 mmc_set_bus_width(card->host, bus_width);
1173
1174                                 /*
1175                                  * If controller can't handle bus width test,
1176                                  * compare ext_csd previously read in 1 bit mode
1177                                  * against ext_csd at new bus width
1178                                  */
1179                                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1180                                         err = mmc_compare_ext_csds(card,
1181                                                 bus_width);
1182                                 else
1183                                         err = mmc_bus_test(card, bus_width);
1184                                 if (!err)
1185                                         break;
1186                         }
1187                 }
1188
1189                 if (!err && ddr) {
1190                         err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1191                                                     ext_csd);
1192                         if (err)
1193                                 pr_warning("%s: power class selection to "
1194                                            "bus width %d ddr %d failed\n",
1195                                            mmc_hostname(card->host),
1196                                            1 << bus_width, ddr);
1197
1198                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1199                                          EXT_CSD_BUS_WIDTH,
1200                                          ext_csd_bits[idx][1],
1201                                          card->ext_csd.generic_cmd6_time);
1202                 }
1203                 if (err) {
1204                         pr_warning("%s: switch to bus width %d ddr %d "
1205                                 "failed\n", mmc_hostname(card->host),
1206                                 1 << bus_width, ddr);
1207                         goto free_card;
1208                 } else if (ddr) {
1209                         /*
1210                          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1211                          * signaling.
1212                          *
1213                          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1214                          *
1215                          * 1.8V vccq at 3.3V core voltage (vcc) is not required
1216                          * in the JEDEC spec for DDR.
1217                          *
1218                          * Do not force change in vccq since we are obviously
1219                          * working and no change to vccq is needed.
1220                          *
1221                          * WARNING: eMMC rules are NOT the same as SD DDR
1222                          */
1223                         if (ddr == MMC_1_2V_DDR_MODE) {
1224                                 err = mmc_set_signal_voltage(host,
1225                                         MMC_SIGNAL_VOLTAGE_120, 0);
1226                                 if (err)
1227                                         goto err;
1228                         }
1229                         mmc_card_set_ddr_mode(card);
1230                         mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1231                         mmc_set_bus_width(card->host, bus_width);
1232                 }
1233         }
1234
1235         /*
1236          * Enable HPI feature (if supported)
1237          */
1238         if (card->ext_csd.hpi) {
1239                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1240                                 EXT_CSD_HPI_MGMT, 1,
1241                                 card->ext_csd.generic_cmd6_time);
1242                 if (err && err != -EBADMSG)
1243                         goto free_card;
1244                 if (err) {
1245                         pr_warning("%s: Enabling HPI failed\n",
1246                                    mmc_hostname(card->host));
1247                         err = 0;
1248                 } else
1249                         card->ext_csd.hpi_en = 1;
1250         }
1251
1252         /*
1253          * If cache size is higher than 0, this indicates
1254          * the existence of cache and it can be turned on.
1255          */
1256         if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1257                         card->ext_csd.cache_size > 0) {
1258                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1259                                 EXT_CSD_CACHE_CTRL, 1,
1260                                 card->ext_csd.generic_cmd6_time);
1261                 if (err && err != -EBADMSG)
1262                         goto free_card;
1263
1264                 /*
1265                  * Only if no error, cache is turned on successfully.
1266                  */
1267                 if (err) {
1268                         pr_warning("%s: Cache is supported, "
1269                                         "but failed to turn on (%d)\n",
1270                                         mmc_hostname(card->host), err);
1271                         card->ext_csd.cache_ctrl = 0;
1272                         err = 0;
1273                 } else {
1274                         card->ext_csd.cache_ctrl = 1;
1275                 }
1276         }
1277
1278         if (!oldcard)
1279                 host->card = card;
1280
1281         mmc_free_ext_csd(ext_csd);
1282         return 0;
1283
1284 free_card:
1285         if (!oldcard)
1286                 mmc_remove_card(card);
1287 err:
1288         mmc_free_ext_csd(ext_csd);
1289
1290         return err;
1291 }
1292
1293 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1294 {
1295         return card &&
1296                 mmc_card_mmc(card) &&
1297                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1298 }
1299
1300 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1301 {
1302         unsigned int timeout = card->ext_csd.generic_cmd6_time;
1303         int err;
1304
1305         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1306         if (notify_type == EXT_CSD_POWER_OFF_LONG)
1307                 timeout = card->ext_csd.power_off_longtime;
1308
1309         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1310                          EXT_CSD_POWER_OFF_NOTIFICATION,
1311                          notify_type, timeout);
1312         if (err)
1313                 pr_err("%s: Power Off Notification timed out, %u\n",
1314                        mmc_hostname(card->host), timeout);
1315
1316         /* Disable the power off notification after the switch operation. */
1317         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1318
1319         return err;
1320 }
1321
1322 /*
1323  * Host is being removed. Free up the current card.
1324  */
1325 static void mmc_remove(struct mmc_host *host)
1326 {
1327         BUG_ON(!host);
1328         BUG_ON(!host->card);
1329
1330         mmc_remove_card(host->card);
1331         host->card = NULL;
1332 }
1333
1334 /*
1335  * Card detection - card is alive.
1336  */
1337 static int mmc_alive(struct mmc_host *host)
1338 {
1339         return mmc_send_status(host->card, NULL);
1340 }
1341
1342 /*
1343  * Card detection callback from host.
1344  */
1345 static void mmc_detect(struct mmc_host *host)
1346 {
1347         int err;
1348
1349         BUG_ON(!host);
1350         BUG_ON(!host->card);
1351
1352         mmc_claim_host(host);
1353
1354         /*
1355          * Just check if our card has been removed.
1356          */
1357         err = _mmc_detect_card_removed(host);
1358
1359         mmc_release_host(host);
1360
1361         if (err) {
1362                 mmc_remove(host);
1363
1364                 mmc_claim_host(host);
1365                 mmc_detach_bus(host);
1366                 mmc_power_off(host);
1367                 mmc_release_host(host);
1368         }
1369 }
1370
1371 /*
1372  * Suspend callback from host.
1373  */
1374 static int mmc_suspend(struct mmc_host *host)
1375 {
1376         int err = 0;
1377
1378         BUG_ON(!host);
1379         BUG_ON(!host->card);
1380
1381         mmc_claim_host(host);
1382         if (mmc_can_poweroff_notify(host->card))
1383                 err = mmc_poweroff_notify(host->card, EXT_CSD_POWER_OFF_SHORT);
1384         else if (mmc_card_can_sleep(host))
1385                 err = mmc_card_sleep(host);
1386         else if (!mmc_host_is_spi(host))
1387                 err = mmc_deselect_cards(host);
1388         host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1389         mmc_release_host(host);
1390
1391         return err;
1392 }
1393
1394 /*
1395  * Resume callback from host.
1396  *
1397  * This function tries to determine if the same card is still present
1398  * and, if so, restore all state to it.
1399  */
1400 static int mmc_resume(struct mmc_host *host)
1401 {
1402         int err;
1403
1404         BUG_ON(!host);
1405         BUG_ON(!host->card);
1406
1407         mmc_claim_host(host);
1408         err = mmc_init_card(host, host->ocr, host->card);
1409         mmc_release_host(host);
1410
1411         return err;
1412 }
1413
1414 static int mmc_power_restore(struct mmc_host *host)
1415 {
1416         int ret;
1417
1418         host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1419         mmc_claim_host(host);
1420         ret = mmc_init_card(host, host->ocr, host->card);
1421         mmc_release_host(host);
1422
1423         return ret;
1424 }
1425
1426 static int mmc_sleep(struct mmc_host *host)
1427 {
1428         struct mmc_card *card = host->card;
1429         int err = -ENOSYS;
1430
1431         if (card && card->ext_csd.rev >= 3) {
1432                 err = mmc_card_sleepawake(host, 1);
1433                 if (err < 0)
1434                         pr_debug("%s: Error %d while putting card into sleep",
1435                                  mmc_hostname(host), err);
1436         }
1437
1438         return err;
1439 }
1440
1441 static int mmc_awake(struct mmc_host *host)
1442 {
1443         struct mmc_card *card = host->card;
1444         int err = -ENOSYS;
1445
1446         if (card && card->ext_csd.rev >= 3) {
1447                 err = mmc_card_sleepawake(host, 0);
1448                 if (err < 0)
1449                         pr_debug("%s: Error %d while awaking sleeping card",
1450                                  mmc_hostname(host), err);
1451         }
1452
1453         return err;
1454 }
1455
1456 static const struct mmc_bus_ops mmc_ops = {
1457         .awake = mmc_awake,
1458         .sleep = mmc_sleep,
1459         .remove = mmc_remove,
1460         .detect = mmc_detect,
1461         .suspend = NULL,
1462         .resume = NULL,
1463         .power_restore = mmc_power_restore,
1464         .alive = mmc_alive,
1465 };
1466
1467 static const struct mmc_bus_ops mmc_ops_unsafe = {
1468         .awake = mmc_awake,
1469         .sleep = mmc_sleep,
1470         .remove = mmc_remove,
1471         .detect = mmc_detect,
1472         .suspend = mmc_suspend,
1473         .resume = mmc_resume,
1474         .power_restore = mmc_power_restore,
1475         .alive = mmc_alive,
1476 };
1477
1478 static void mmc_attach_bus_ops(struct mmc_host *host)
1479 {
1480         const struct mmc_bus_ops *bus_ops;
1481
1482         if (!mmc_card_is_removable(host))
1483                 bus_ops = &mmc_ops_unsafe;
1484         else
1485                 bus_ops = &mmc_ops;
1486         mmc_attach_bus(host, bus_ops);
1487 }
1488
1489 /*
1490  * Starting point for MMC card init.
1491  */
1492 int mmc_attach_mmc(struct mmc_host *host)
1493 {
1494         int err;
1495         u32 ocr;
1496
1497         BUG_ON(!host);
1498         WARN_ON(!host->claimed);
1499
1500         /* Set correct bus mode for MMC before attempting attach */
1501         if (!mmc_host_is_spi(host))
1502                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1503
1504         err = mmc_send_op_cond(host, 0, &ocr);
1505         if (err)
1506                 return err;
1507
1508         mmc_attach_bus_ops(host);
1509         if (host->ocr_avail_mmc)
1510                 host->ocr_avail = host->ocr_avail_mmc;
1511
1512         /*
1513          * We need to get OCR a different way for SPI.
1514          */
1515         if (mmc_host_is_spi(host)) {
1516                 err = mmc_spi_read_ocr(host, 1, &ocr);
1517                 if (err)
1518                         goto err;
1519         }
1520
1521         /*
1522          * Sanity check the voltages that the card claims to
1523          * support.
1524          */
1525         if (ocr & 0x7F) {
1526                 pr_warning("%s: card claims to support voltages "
1527                        "below the defined range. These will be ignored.\n",
1528                        mmc_hostname(host));
1529                 ocr &= ~0x7F;
1530         }
1531
1532         host->ocr = mmc_select_voltage(host, ocr);
1533
1534         /*
1535          * Can we support the voltage of the card?
1536          */
1537         if (!host->ocr) {
1538                 err = -EINVAL;
1539                 goto err;
1540         }
1541
1542         /*
1543          * Detect and init the card.
1544          */
1545         err = mmc_init_card(host, host->ocr, NULL);
1546         if (err)
1547                 goto err;
1548
1549         mmc_release_host(host);
1550         err = mmc_add_card(host->card);
1551         mmc_claim_host(host);
1552         if (err)
1553                 goto remove_card;
1554
1555         return 0;
1556
1557 remove_card:
1558         mmc_release_host(host);
1559         mmc_remove_card(host->card);
1560         mmc_claim_host(host);
1561         host->card = NULL;
1562 err:
1563         mmc_detach_bus(host);
1564
1565         pr_err("%s: error %d whilst initialising MMC card\n",
1566                 mmc_hostname(host), err);
1567
1568         return err;
1569 }