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 #include <linux/pm_runtime.h>
  17
  18 #include <linux/mmc/host.h>
  19 #include <linux/mmc/card.h>
  20 #include <linux/mmc/mmc.h>
  21
  22 #include "core.h"
  23 #include "bus.h"
  24 #include "mmc_ops.h"
  25 #include "sd_ops.h"
  26
  27 static const unsigned int tran_exp[] = {
  28         10000,          100000,         1000000,        10000000,
  29         0,              0,              0,              0
  30 };
  31
  32 static const unsigned char tran_mant[] = {
  33         0,      10,     12,     13,     15,     20,     25,     30,
  34         35,     40,     45,     50,     55,     60,     70,     80,
  35 };
  36
  37 static const unsigned int tacc_exp[] = {
  38         1,      10,     100,    1000,   10000,  100000, 1000000, 10000000,
  39 };
  40
  41 static const unsigned int tacc_mant[] = {
  42         0,      10,     12,     13,     15,     20,     25,     30,
  43         35,     40,     45,     50,     55,     60,     70,     80,
  44 };
  45
  46 #define UNSTUFF_BITS(resp,start,size)                                   \
  47         ({                                                              \
  48                 const int __size = size;                                \
  49                 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
  50                 const int __off = 3 - ((start) / 32);                   \
  51                 const int __shft = (start) & 31;                        \
  52                 u32 __res;                                              \
  53                                                                         \
  54                 __res = resp[__off] >> __shft;                          \
  55                 if (__size + __shft > 32)                               \
  56                         __res |= resp[__off-1] << ((32 - __shft) % 32); \
  57                 __res & __mask;                                         \
  58         })
  59
  60 /*
  61  * Given the decoded CSD structure, decode the raw CID to our CID structure.
  62  */
  63 static int mmc_decode_cid(struct mmc_card *card)
  64 {
  65         u32 *resp = card->raw_cid;
  66
  67         /*
  68          * The selection of the format here is based upon published
  69          * specs from sandisk and from what people have reported.
  70          */
  71         switch (card->csd.mmca_vsn) {
  72         case 0: /* MMC v1.0 - v1.2 */
  73         case 1: /* MMC v1.4 */
  74                 card->cid.manfid        = UNSTUFF_BITS(resp, 104, 24);
  75                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  76                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  77                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  78                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  79                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  80                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  81                 card->cid.prod_name[6]  = UNSTUFF_BITS(resp, 48, 8);
  82                 card->cid.hwrev         = UNSTUFF_BITS(resp, 44, 4);
  83                 card->cid.fwrev         = UNSTUFF_BITS(resp, 40, 4);
  84                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 24);
  85                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
  86                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
  87                 break;
  88
  89         case 2: /* MMC v2.0 - v2.2 */
  90         case 3: /* MMC v3.1 - v3.3 */
  91         case 4: /* MMC v4 */
  92                 card->cid.manfid        = UNSTUFF_BITS(resp, 120, 8);
  93                 card->cid.oemid         = UNSTUFF_BITS(resp, 104, 16);
  94                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  95                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  96                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  97                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  98                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  99                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
 100                 card->cid.prv           = UNSTUFF_BITS(resp, 48, 8);
 101                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 32);
 102                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 103                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 104                 break;
 105
 106         default:
 107                 pr_err("%s: card has unknown MMCA version %d\n",
 108                         mmc_hostname(card->host), card->csd.mmca_vsn);
 109                 return -EINVAL;
 110         }
 111
 112         return 0;
 113 }
 114
 115 static void mmc_set_erase_size(struct mmc_card *card)
 116 {
 117         if (card->ext_csd.erase_group_def & 1)
 118                 card->erase_size = card->ext_csd.hc_erase_size;
 119         else
 120                 card->erase_size = card->csd.erase_size;
 121
 122         mmc_init_erase(card);
 123 }
 124
 125 /*
 126  * Given a 128-bit response, decode to our card CSD structure.
 127  */
 128 static int mmc_decode_csd(struct mmc_card *card)
 129 {
 130         struct mmc_csd *csd = &card->csd;
 131         unsigned int e, m, a, b;
 132         u32 *resp = card->raw_csd;
 133
 134         /*
 135          * We only understand CSD structure v1.1 and v1.2.
 136          * v1.2 has extra information in bits 15, 11 and 10.
 137          * We also support eMMC v4.4 & v4.41.
 138          */
 139         csd->structure = UNSTUFF_BITS(resp, 126, 2);
 140         if (csd->structure == 0) {
 141                 pr_err("%s: unrecognised CSD structure version %d\n",
 142                         mmc_hostname(card->host), csd->structure);
 143                 return -EINVAL;
 144         }
 145
 146         csd->mmca_vsn    = UNSTUFF_BITS(resp, 122, 4);
 147         m = UNSTUFF_BITS(resp, 115, 4);
 148         e = UNSTUFF_BITS(resp, 112, 3);
 149         csd->tacc_ns     = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
 150         csd->tacc_clks   = UNSTUFF_BITS(resp, 104, 8) * 100;
 151
 152         m = UNSTUFF_BITS(resp, 99, 4);
 153         e = UNSTUFF_BITS(resp, 96, 3);
 154         csd->max_dtr      = tran_exp[e] * tran_mant[m];
 155         csd->cmdclass     = UNSTUFF_BITS(resp, 84, 12);
 156
 157         e = UNSTUFF_BITS(resp, 47, 3);
 158         m = UNSTUFF_BITS(resp, 62, 12);
 159         csd->capacity     = (1 + m) << (e + 2);
 160
 161         csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
 162         csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 163         csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 164         csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
 165         csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
 166         csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 167         csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 168         csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 169
 170         if (csd->write_blkbits >= 9) {
 171                 a = UNSTUFF_BITS(resp, 42, 5);
 172                 b = UNSTUFF_BITS(resp, 37, 5);
 173                 csd->erase_size = (a + 1) * (b + 1);
 174                 csd->erase_size <<= csd->write_blkbits - 9;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static void mmc_select_card_type(struct mmc_card *card)
 181 {
 182         struct mmc_host *host = card->host;
 183         u8 card_type = card->ext_csd.raw_card_type;
 184         u32 caps = host->caps, caps2 = host->caps2;
 185         unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
 186         unsigned int avail_type = 0;
 187
 188         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 189             card_type & EXT_CSD_CARD_TYPE_HS_26) {
 190                 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
 191                 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
 192         }
 193
 194         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 195             card_type & EXT_CSD_CARD_TYPE_HS_52) {
 196                 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
 197                 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
 198         }
 199
 200         if (caps & MMC_CAP_1_8V_DDR &&
 201             card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
 202                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 203                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
 204         }
 205
 206         if (caps & MMC_CAP_1_2V_DDR &&
 207             card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
 208                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 209                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
 210         }
 211
 212         if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
 213             card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
 214                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 215                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
 216         }
 217
 218         if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
 219             card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
 220                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 221                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
 222         }
 223
 224         if (caps2 & MMC_CAP2_HS400_1_8V &&
 225             card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
 226                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 227                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
 228         }
 229
 230         if (caps2 & MMC_CAP2_HS400_1_2V &&
 231             card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
 232                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 233                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
 234         }
 235
 236         card->ext_csd.hs_max_dtr = hs_max_dtr;
 237         card->ext_csd.hs200_max_dtr = hs200_max_dtr;
 238         card->mmc_avail_type = avail_type;
 239 }
 240
 241 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
 242 {
 243         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 244
 245         /*
 246          * Disable these attributes by default
 247          */
 248         card->ext_csd.enhanced_area_offset = -EINVAL;
 249         card->ext_csd.enhanced_area_size = -EINVAL;
 250
 251         /*
 252          * Enhanced area feature support -- check whether the eMMC
 253          * card has the Enhanced area enabled.  If so, export enhanced
 254          * area offset and size to user by adding sysfs interface.
 255          */
 256         if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
 257             (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
 258                 if (card->ext_csd.partition_setting_completed) {
 259                         hc_erase_grp_sz =
 260                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 261                         hc_wp_grp_sz =
 262                                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 263
 264                         /*
 265                          * calculate the enhanced data area offset, in bytes
 266                          */
 267                         card->ext_csd.enhanced_area_offset =
 268                                 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
 269                                 (ext_csd[137] << 8) + ext_csd[136];
 270                         if (mmc_card_blockaddr(card))
 271                                 card->ext_csd.enhanced_area_offset <<= 9;
 272                         /*
 273                          * calculate the enhanced data area size, in kilobytes
 274                          */
 275                         card->ext_csd.enhanced_area_size =
 276                                 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
 277                                 ext_csd[140];
 278                         card->ext_csd.enhanced_area_size *=
 279                                 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
 280                         card->ext_csd.enhanced_area_size <<= 9;
 281                 } else {
 282                         pr_warn("%s: defines enhanced area without partition setting complete\n",
 283                                 mmc_hostname(card->host));
 284                 }
 285         }
 286 }
 287
 288 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
 289 {
 290         int idx;
 291         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 292         unsigned int part_size;
 293
 294         /*
 295          * General purpose partition feature support --
 296          * If ext_csd has the size of general purpose partitions,
 297          * set size, part_cfg, partition name in mmc_part.
 298          */
 299         if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
 300             EXT_CSD_PART_SUPPORT_PART_EN) {
 301                 hc_erase_grp_sz =
 302                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 303                 hc_wp_grp_sz =
 304                         ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 305
 306                 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
 307                         if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
 308                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
 309                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
 310                                 continue;
 311                         if (card->ext_csd.partition_setting_completed == 0) {
 312                                 pr_warn("%s: has partition size defined without partition complete\n",
 313                                         mmc_hostname(card->host));
 314                                 break;
 315                         }
 316                         part_size =
 317                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
 318                                 << 16) +
 319                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
 320                                 << 8) +
 321                                 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
 322                         part_size *= (size_t)(hc_erase_grp_sz *
 323                                 hc_wp_grp_sz);
 324                         mmc_part_add(card, part_size << 19,
 325                                 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
 326                                 "gp%d", idx, false,
 327                                 MMC_BLK_DATA_AREA_GP);
 328                 }
 329         }
 330 }
 331
 332 /*
 333  * Decode extended CSD.
 334  */
 335 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 336 {
 337         int err = 0, idx;
 338         unsigned int part_size;
 339
 340         /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 341         card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
 342         if (card->csd.structure == 3) {
 343                 if (card->ext_csd.raw_ext_csd_structure > 2) {
 344                         pr_err("%s: unrecognised EXT_CSD structure "
 345                                 "version %d\n", mmc_hostname(card->host),
 346                                         card->ext_csd.raw_ext_csd_structure);
 347                         err = -EINVAL;
 348                         goto out;
 349                 }
 350         }
 351
 352         /*
 353          * The EXT_CSD format is meant to be forward compatible. As long
 354          * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
 355          * are authorized, see JEDEC JESD84-B50 section B.8.
 356          */
 357         card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 358
 359         card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 360         card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
 361         card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
 362         card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
 363         if (card->ext_csd.rev >= 2) {
 364                 card->ext_csd.sectors =
 365                         ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
 366                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
 367                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
 368                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 369
 370                 /* Cards with density > 2GiB are sector addressed */
 371                 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
 372                         mmc_card_set_blockaddr(card);
 373         }
 374
 375         card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 376         mmc_select_card_type(card);
 377
 378         card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
 379         card->ext_csd.raw_erase_timeout_mult =
 380                 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 381         card->ext_csd.raw_hc_erase_grp_size =
 382                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 383         if (card->ext_csd.rev >= 3) {
 384                 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
 385                 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
 386
 387                 /* EXT_CSD value is in units of 10ms, but we store in ms */
 388                 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 389
 390                 /* Sleep / awake timeout in 100ns units */
 391                 if (sa_shift > 0 && sa_shift <= 0x17)
 392                         card->ext_csd.sa_timeout =
 393                                         1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
 394                 card->ext_csd.erase_group_def =
 395                         ext_csd[EXT_CSD_ERASE_GROUP_DEF];
 396                 card->ext_csd.hc_erase_timeout = 300 *
 397                         ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 398                 card->ext_csd.hc_erase_size =
 399                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
 400
 401                 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
 402
 403                 /*
 404                  * There are two boot regions of equal size, defined in
 405                  * multiples of 128K.
 406                  */
 407                 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
 408                         for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
 409                                 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 410                                 mmc_part_add(card, part_size,
 411                                         EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
 412                                         "boot%d", idx, true,
 413                                         MMC_BLK_DATA_AREA_BOOT);
 414                         }
 415                 }
 416         }
 417
 418         card->ext_csd.raw_hc_erase_gap_size =
 419                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 420         card->ext_csd.raw_sec_trim_mult =
 421                 ext_csd[EXT_CSD_SEC_TRIM_MULT];
 422         card->ext_csd.raw_sec_erase_mult =
 423                 ext_csd[EXT_CSD_SEC_ERASE_MULT];
 424         card->ext_csd.raw_sec_feature_support =
 425                 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 426         card->ext_csd.raw_trim_mult =
 427                 ext_csd[EXT_CSD_TRIM_MULT];
 428         card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 429         if (card->ext_csd.rev >= 4) {
 430                 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
 431                     EXT_CSD_PART_SETTING_COMPLETED)
 432                         card->ext_csd.partition_setting_completed = 1;
 433                 else
 434                         card->ext_csd.partition_setting_completed = 0;
 435
 436                 mmc_manage_enhanced_area(card, ext_csd);
 437
 438                 mmc_manage_gp_partitions(card, ext_csd);
 439
 440                 card->ext_csd.sec_trim_mult =
 441                         ext_csd[EXT_CSD_SEC_TRIM_MULT];
 442                 card->ext_csd.sec_erase_mult =
 443                         ext_csd[EXT_CSD_SEC_ERASE_MULT];
 444                 card->ext_csd.sec_feature_support =
 445                         ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 446                 card->ext_csd.trim_timeout = 300 *
 447                         ext_csd[EXT_CSD_TRIM_MULT];
 448
 449                 /*
 450                  * Note that the call to mmc_part_add above defaults to read
 451                  * only. If this default assumption is changed, the call must
 452                  * take into account the value of boot_locked below.
 453                  */
 454                 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
 455                 card->ext_csd.boot_ro_lockable = true;
 456
 457                 /* Save power class values */
 458                 card->ext_csd.raw_pwr_cl_52_195 =
 459                         ext_csd[EXT_CSD_PWR_CL_52_195];
 460                 card->ext_csd.raw_pwr_cl_26_195 =
 461                         ext_csd[EXT_CSD_PWR_CL_26_195];
 462                 card->ext_csd.raw_pwr_cl_52_360 =
 463                         ext_csd[EXT_CSD_PWR_CL_52_360];
 464                 card->ext_csd.raw_pwr_cl_26_360 =
 465                         ext_csd[EXT_CSD_PWR_CL_26_360];
 466                 card->ext_csd.raw_pwr_cl_200_195 =
 467                         ext_csd[EXT_CSD_PWR_CL_200_195];
 468                 card->ext_csd.raw_pwr_cl_200_360 =
 469                         ext_csd[EXT_CSD_PWR_CL_200_360];
 470                 card->ext_csd.raw_pwr_cl_ddr_52_195 =
 471                         ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
 472                 card->ext_csd.raw_pwr_cl_ddr_52_360 =
 473                         ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
 474                 card->ext_csd.raw_pwr_cl_ddr_200_360 =
 475                         ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
 476         }
 477
 478         if (card->ext_csd.rev >= 5) {
 479                 /* Adjust production date as per JEDEC JESD84-B451 */
 480                 if (card->cid.year < 2010)
 481                         card->cid.year += 16;
 482
 483                 /* check whether the eMMC card supports BKOPS */
 484                 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 485                         card->ext_csd.bkops = 1;
 486                         card->ext_csd.man_bkops_en =
 487                                         (ext_csd[EXT_CSD_BKOPS_EN] &
 488                                                 EXT_CSD_MANUAL_BKOPS_MASK);
 489                         card->ext_csd.raw_bkops_status =
 490                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 491                         if (!card->ext_csd.man_bkops_en)
 492                                 pr_info("%s: MAN_BKOPS_EN bit is not set\n",
 493                                         mmc_hostname(card->host));
 494                 }
 495
 496                 /* check whether the eMMC card supports HPI */
 497                 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
 498                         card->ext_csd.hpi = 1;
 499                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 500                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 501                         else
 502                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 503                         /*
 504                          * Indicate the maximum timeout to close
 505                          * a command interrupted by HPI
 506                          */
 507                         card->ext_csd.out_of_int_time =
 508                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 509                 }
 510
 511                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 512                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 513
 514                 /*
 515                  * RPMB regions are defined in multiples of 128K.
 516                  */
 517                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 518                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 519                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 520                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 521                                 "rpmb", 0, false,
 522                                 MMC_BLK_DATA_AREA_RPMB);
 523                 }
 524         }
 525
 526         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 527         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 528                 card->erased_byte = 0xFF;
 529         else
 530                 card->erased_byte = 0x0;
 531
 532         /* eMMC v4.5 or later */
 533         if (card->ext_csd.rev >= 6) {
 534                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 535
 536                 card->ext_csd.generic_cmd6_time = 10 *
 537                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 538                 card->ext_csd.power_off_longtime = 10 *
 539                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 540
 541                 card->ext_csd.cache_size =
 542                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 543                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 544                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 545                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 546
 547                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 548                         card->ext_csd.data_sector_size = 4096;
 549                 else
 550                         card->ext_csd.data_sector_size = 512;
 551
 552                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 553                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 554                         card->ext_csd.data_tag_unit_size =
 555                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 556                         (card->ext_csd.data_sector_size);
 557                 } else {
 558                         card->ext_csd.data_tag_unit_size = 0;
 559                 }
 560
 561                 card->ext_csd.max_packed_writes =
 562                         ext_csd[EXT_CSD_MAX_PACKED_WRITES];
 563                 card->ext_csd.max_packed_reads =
 564                         ext_csd[EXT_CSD_MAX_PACKED_READS];
 565         } else {
 566                 card->ext_csd.data_sector_size = 512;
 567         }
 568
 569         /* eMMC v5 or later */
 570         if (card->ext_csd.rev >= 7) {
 571                 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
 572                        MMC_FIRMWARE_LEN);
 573                 card->ext_csd.ffu_capable =
 574                         (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
 575                         !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
 576         }
 577 out:
 578         return err;
 579 }
 580
 581 static int mmc_read_ext_csd(struct mmc_card *card)
 582 {
 583         u8 *ext_csd;
 584         int err;
 585
 586         if (!mmc_can_ext_csd(card))
 587                 return 0;
 588
 589         err = mmc_get_ext_csd(card, &ext_csd);
 590         if (err) {
 591                 /* If the host or the card can't do the switch,
 592                  * fail more gracefully. */
 593                 if ((err != -EINVAL)
 594                  && (err != -ENOSYS)
 595                  && (err != -EFAULT))
 596                         return err;
 597
 598                 /*
 599                  * High capacity cards should have this "magic" size
 600                  * stored in their CSD.
 601                  */
 602                 if (card->csd.capacity == (4096 * 512)) {
 603                         pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
 604                                 mmc_hostname(card->host));
 605                 } else {
 606                         pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
 607                                 mmc_hostname(card->host));
 608                         err = 0;
 609                 }
 610
 611                 return err;
 612         }
 613
 614         err = mmc_decode_ext_csd(card, ext_csd);
 615         kfree(ext_csd);
 616         return err;
 617 }
 618
 619 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 620 {
 621         u8 *bw_ext_csd;
 622         int err;
 623
 624         if (bus_width == MMC_BUS_WIDTH_1)
 625                 return 0;
 626
 627         err = mmc_get_ext_csd(card, &bw_ext_csd);
 628         if (err)
 629                 return err;
 630
 631         /* only compare read only fields */
 632         err = !((card->ext_csd.raw_partition_support ==
 633                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 634                 (card->ext_csd.raw_erased_mem_count ==
 635                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 636                 (card->ext_csd.rev ==
 637                         bw_ext_csd[EXT_CSD_REV]) &&
 638                 (card->ext_csd.raw_ext_csd_structure ==
 639                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 640                 (card->ext_csd.raw_card_type ==
 641                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 642                 (card->ext_csd.raw_s_a_timeout ==
 643                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 644                 (card->ext_csd.raw_hc_erase_gap_size ==
 645                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 646                 (card->ext_csd.raw_erase_timeout_mult ==
 647                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 648                 (card->ext_csd.raw_hc_erase_grp_size ==
 649                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 650                 (card->ext_csd.raw_sec_trim_mult ==
 651                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 652                 (card->ext_csd.raw_sec_erase_mult ==
 653                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 654                 (card->ext_csd.raw_sec_feature_support ==
 655                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 656                 (card->ext_csd.raw_trim_mult ==
 657                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 658                 (card->ext_csd.raw_sectors[0] ==
 659                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 660                 (card->ext_csd.raw_sectors[1] ==
 661                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 662                 (card->ext_csd.raw_sectors[2] ==
 663                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 664                 (card->ext_csd.raw_sectors[3] ==
 665                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
 666                 (card->ext_csd.raw_pwr_cl_52_195 ==
 667                         bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
 668                 (card->ext_csd.raw_pwr_cl_26_195 ==
 669                         bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
 670                 (card->ext_csd.raw_pwr_cl_52_360 ==
 671                         bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
 672                 (card->ext_csd.raw_pwr_cl_26_360 ==
 673                         bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
 674                 (card->ext_csd.raw_pwr_cl_200_195 ==
 675                         bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
 676                 (card->ext_csd.raw_pwr_cl_200_360 ==
 677                         bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
 678                 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
 679                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
 680                 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
 681                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
 682                 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
 683                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
 684
 685         if (err)
 686                 err = -EINVAL;
 687
 688         kfree(bw_ext_csd);
 689         return err;
 690 }
 691
 692 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 693         card->raw_cid[2], card->raw_cid[3]);
 694 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 695         card->raw_csd[2], card->raw_csd[3]);
 696 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 697 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 698 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 699 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
 700 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 701 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 702 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 703 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 704 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
 705 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 706 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 707                 card->ext_csd.enhanced_area_offset);
 708 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 709 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 710 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 711
 712 static ssize_t mmc_fwrev_show(struct device *dev,
 713                               struct device_attribute *attr,
 714                               char *buf)
 715 {
 716         struct mmc_card *card = mmc_dev_to_card(dev);
 717
 718         if (card->ext_csd.rev < 7) {
 719                 return sprintf(buf, "0x%x\n", card->cid.fwrev);
 720         } else {
 721                 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
 722                                card->ext_csd.fwrev);
 723         }
 724 }
 725
 726 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
 727
 728 static struct attribute *mmc_std_attrs[] = {
 729         &dev_attr_cid.attr,
 730         &dev_attr_csd.attr,
 731         &dev_attr_date.attr,
 732         &dev_attr_erase_size.attr,
 733         &dev_attr_preferred_erase_size.attr,
 734         &dev_attr_fwrev.attr,
 735         &dev_attr_ffu_capable.attr,
 736         &dev_attr_hwrev.attr,
 737         &dev_attr_manfid.attr,
 738         &dev_attr_name.attr,
 739         &dev_attr_oemid.attr,
 740         &dev_attr_prv.attr,
 741         &dev_attr_serial.attr,
 742         &dev_attr_enhanced_area_offset.attr,
 743         &dev_attr_enhanced_area_size.attr,
 744         &dev_attr_raw_rpmb_size_mult.attr,
 745         &dev_attr_rel_sectors.attr,
 746         NULL,
 747 };
 748 ATTRIBUTE_GROUPS(mmc_std);
 749
 750 static struct device_type mmc_type = {
 751         .groups = mmc_std_groups,
 752 };
 753
 754 /*
 755  * Select the PowerClass for the current bus width
 756  * If power class is defined for 4/8 bit bus in the
 757  * extended CSD register, select it by executing the
 758  * mmc_switch command.
 759  */
 760 static int __mmc_select_powerclass(struct mmc_card *card,
 761                                    unsigned int bus_width)
 762 {
 763         struct mmc_host *host = card->host;
 764         struct mmc_ext_csd *ext_csd = &card->ext_csd;
 765         unsigned int pwrclass_val = 0;
 766         int err = 0;
 767
 768         switch (1 << host->ios.vdd) {
 769         case MMC_VDD_165_195:
 770                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 771                         pwrclass_val = ext_csd->raw_pwr_cl_26_195;
 772                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 773                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 774                                 ext_csd->raw_pwr_cl_52_195 :
 775                                 ext_csd->raw_pwr_cl_ddr_52_195;
 776                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 777                         pwrclass_val = ext_csd->raw_pwr_cl_200_195;
 778                 break;
 779         case MMC_VDD_27_28:
 780         case MMC_VDD_28_29:
 781         case MMC_VDD_29_30:
 782         case MMC_VDD_30_31:
 783         case MMC_VDD_31_32:
 784         case MMC_VDD_32_33:
 785         case MMC_VDD_33_34:
 786         case MMC_VDD_34_35:
 787         case MMC_VDD_35_36:
 788                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 789                         pwrclass_val = ext_csd->raw_pwr_cl_26_360;
 790                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 791                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 792                                 ext_csd->raw_pwr_cl_52_360 :
 793                                 ext_csd->raw_pwr_cl_ddr_52_360;
 794                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 795                         pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
 796                                 ext_csd->raw_pwr_cl_ddr_200_360 :
 797                                 ext_csd->raw_pwr_cl_200_360;
 798                 break;
 799         default:
 800                 pr_warn("%s: Voltage range not supported for power class\n",
 801                         mmc_hostname(host));
 802                 return -EINVAL;
 803         }
 804
 805         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 806                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 807                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 808         else
 809                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 810                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 811
 812         /* If the power class is different from the default value */
 813         if (pwrclass_val > 0) {
 814                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 815                                  EXT_CSD_POWER_CLASS,
 816                                  pwrclass_val,
 817                                  card->ext_csd.generic_cmd6_time);
 818         }
 819
 820         return err;
 821 }
 822
 823 static int mmc_select_powerclass(struct mmc_card *card)
 824 {
 825         struct mmc_host *host = card->host;
 826         u32 bus_width, ext_csd_bits;
 827         int err, ddr;
 828
 829         /* Power class selection is supported for versions >= 4.0 */
 830         if (!mmc_can_ext_csd(card))
 831                 return 0;
 832
 833         bus_width = host->ios.bus_width;
 834         /* Power class values are defined only for 4/8 bit bus */
 835         if (bus_width == MMC_BUS_WIDTH_1)
 836                 return 0;
 837
 838         ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
 839         if (ddr)
 840                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 841                         EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 842         else
 843                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 844                         EXT_CSD_BUS_WIDTH_8 :  EXT_CSD_BUS_WIDTH_4;
 845
 846         err = __mmc_select_powerclass(card, ext_csd_bits);
 847         if (err)
 848                 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
 849                         mmc_hostname(host), 1 << bus_width, ddr);
 850
 851         return err;
 852 }
 853
 854 /*
 855  * Set the bus speed for the selected speed mode.
 856  */
 857 static void mmc_set_bus_speed(struct mmc_card *card)
 858 {
 859         unsigned int max_dtr = (unsigned int)-1;
 860
 861         if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
 862              max_dtr > card->ext_csd.hs200_max_dtr)
 863                 max_dtr = card->ext_csd.hs200_max_dtr;
 864         else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
 865                 max_dtr = card->ext_csd.hs_max_dtr;
 866         else if (max_dtr > card->csd.max_dtr)
 867                 max_dtr = card->csd.max_dtr;
 868
 869         mmc_set_clock(card->host, max_dtr);
 870 }
 871
 872 /*
 873  * Select the bus width amoung 4-bit and 8-bit(SDR).
 874  * If the bus width is changed successfully, return the selected width value.
 875  * Zero is returned instead of error value if the wide width is not supported.
 876  */
 877 static int mmc_select_bus_width(struct mmc_card *card)
 878 {
 879         static unsigned ext_csd_bits[] = {
 880                 EXT_CSD_BUS_WIDTH_8,
 881                 EXT_CSD_BUS_WIDTH_4,
 882         };
 883         static unsigned bus_widths[] = {
 884                 MMC_BUS_WIDTH_8,
 885                 MMC_BUS_WIDTH_4,
 886         };
 887         struct mmc_host *host = card->host;
 888         unsigned idx, bus_width = 0;
 889         int err = 0;
 890
 891         if (!mmc_can_ext_csd(card) ||
 892             !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
 893                 return 0;
 894
 895         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
 896
 897         /*
 898          * Unlike SD, MMC cards dont have a configuration register to notify
 899          * supported bus width. So bus test command should be run to identify
 900          * the supported bus width or compare the ext csd values of current
 901          * bus width and ext csd values of 1 bit mode read earlier.
 902          */
 903         for (; idx < ARRAY_SIZE(bus_widths); idx++) {
 904                 /*
 905                  * Host is capable of 8bit transfer, then switch
 906                  * the device to work in 8bit transfer mode. If the
 907                  * mmc switch command returns error then switch to
 908                  * 4bit transfer mode. On success set the corresponding
 909                  * bus width on the host.
 910                  */
 911                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 912                                  EXT_CSD_BUS_WIDTH,
 913                                  ext_csd_bits[idx],
 914                                  card->ext_csd.generic_cmd6_time);
 915                 if (err)
 916                         continue;
 917
 918                 bus_width = bus_widths[idx];
 919                 mmc_set_bus_width(host, bus_width);
 920
 921                 /*
 922                  * If controller can't handle bus width test,
 923                  * compare ext_csd previously read in 1 bit mode
 924                  * against ext_csd at new bus width
 925                  */
 926                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
 927                         err = mmc_compare_ext_csds(card, bus_width);
 928                 else
 929                         err = mmc_bus_test(card, bus_width);
 930
 931                 if (!err) {
 932                         err = bus_width;
 933                         break;
 934                 } else {
 935                         pr_warn("%s: switch to bus width %d failed\n",
 936                                 mmc_hostname(host), ext_csd_bits[idx]);
 937                 }
 938         }
 939
 940         return err;
 941 }
 942
 943 /*
 944  * Switch to the high-speed mode
 945  */
 946 static int mmc_select_hs(struct mmc_card *card)
 947 {
 948         int err;
 949
 950         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 951                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
 952                            card->ext_csd.generic_cmd6_time,
 953                            true, true, true);
 954         if (!err)
 955                 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
 956
 957         return err;
 958 }
 959
 960 /*
 961  * Activate wide bus and DDR if supported.
 962  */
 963 static int mmc_select_hs_ddr(struct mmc_card *card)
 964 {
 965         struct mmc_host *host = card->host;
 966         u32 bus_width, ext_csd_bits;
 967         int err = 0;
 968
 969         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
 970                 return 0;
 971
 972         bus_width = host->ios.bus_width;
 973         if (bus_width == MMC_BUS_WIDTH_1)
 974                 return 0;
 975
 976         ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 977                 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 978
 979         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 980                         EXT_CSD_BUS_WIDTH,
 981                         ext_csd_bits,
 982                         card->ext_csd.generic_cmd6_time);
 983         if (err) {
 984                 pr_err("%s: switch to bus width %d ddr failed\n",
 985                         mmc_hostname(host), 1 << bus_width);
 986                 return err;
 987         }
 988
 989         /*
 990          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
 991          * signaling.
 992          *
 993          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
 994          *
 995          * 1.8V vccq at 3.3V core voltage (vcc) is not required
 996          * in the JEDEC spec for DDR.
 997          *
 998          * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
 999          * host controller can support this, like some of the SDHCI
1000          * controller which connect to an eMMC device. Some of these
1001          * host controller still needs to use 1.8v vccq for supporting
1002          * DDR mode.
1003          *
1004          * So the sequence will be:
1005          * if (host and device can both support 1.2v IO)
1006          *      use 1.2v IO;
1007          * else if (host and device can both support 1.8v IO)
1008          *      use 1.8v IO;
1009          * so if host and device can only support 3.3v IO, this is the
1010          * last choice.
1011          *
1012          * WARNING: eMMC rules are NOT the same as SD DDR
1013          */
1014         err = -EINVAL;
1015         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1016                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1017
1018         if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1019                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1020
1021         /* make sure vccq is 3.3v after switching disaster */
1022         if (err)
1023                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1024
1025         if (!err)
1026                 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1027
1028         return err;
1029 }
1030
1031 static int mmc_select_hs400(struct mmc_card *card)
1032 {
1033         struct mmc_host *host = card->host;
1034         int err = 0;
1035
1036         /*
1037          * HS400 mode requires 8-bit bus width
1038          */
1039         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1040               host->ios.bus_width == MMC_BUS_WIDTH_8))
1041                 return 0;
1042
1043         /*
1044          * Before switching to dual data rate operation for HS400,
1045          * it is required to convert from HS200 mode to HS mode.
1046          */
1047         mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1048         mmc_set_bus_speed(card);
1049
1050         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1051                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1052                            card->ext_csd.generic_cmd6_time,
1053                            true, true, true);
1054         if (err) {
1055                 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1056                         mmc_hostname(host), err);
1057                 return err;
1058         }
1059
1060         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1061                          EXT_CSD_BUS_WIDTH,
1062                          EXT_CSD_DDR_BUS_WIDTH_8,
1063                          card->ext_csd.generic_cmd6_time);
1064         if (err) {
1065                 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1066                         mmc_hostname(host), err);
1067                 return err;
1068         }
1069
1070         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1071                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS400,
1072                            card->ext_csd.generic_cmd6_time,
1073                            true, true, true);
1074         if (err) {
1075                 pr_err("%s: switch to hs400 failed, err:%d\n",
1076                          mmc_hostname(host), err);
1077                 return err;
1078         }
1079
1080         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1081         mmc_set_bus_speed(card);
1082
1083         return 0;
1084 }
1085
1086 /*
1087  * For device supporting HS200 mode, the following sequence
1088  * should be done before executing the tuning process.
1089  * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1090  * 2. switch to HS200 mode
1091  * 3. set the clock to > 52Mhz and <=200MHz
1092  */
1093 static int mmc_select_hs200(struct mmc_card *card)
1094 {
1095         struct mmc_host *host = card->host;
1096         int err = -EINVAL;
1097
1098         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1099                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1100
1101         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1102                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1103
1104         /* If fails try again during next card power cycle */
1105         if (err)
1106                 goto err;
1107
1108         /*
1109          * Set the bus width(4 or 8) with host's support and
1110          * switch to HS200 mode if bus width is set successfully.
1111          */
1112         err = mmc_select_bus_width(card);
1113         if (!IS_ERR_VALUE(err)) {
1114                 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1115                                    EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS200,
1116                                    card->ext_csd.generic_cmd6_time,
1117                                    true, true, true);
1118                 if (!err)
1119                         mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1120         }
1121 err:
1122         return err;
1123 }
1124
1125 /*
1126  * Activate High Speed or HS200 mode if supported.
1127  */
1128 static int mmc_select_timing(struct mmc_card *card)
1129 {
1130         int err = 0;
1131
1132         if (!mmc_can_ext_csd(card))
1133                 goto bus_speed;
1134
1135         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1136                 err = mmc_select_hs200(card);
1137         else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1138                 err = mmc_select_hs(card);
1139
1140         if (err && err != -EBADMSG)
1141                 return err;
1142
1143         if (err) {
1144                 pr_warn("%s: switch to %s failed\n",
1145                         mmc_card_hs(card) ? "high-speed" :
1146                         (mmc_card_hs200(card) ? "hs200" : ""),
1147                         mmc_hostname(card->host));
1148                 err = 0;
1149         }
1150
1151 bus_speed:
1152         /*
1153          * Set the bus speed to the selected bus timing.
1154          * If timing is not selected, backward compatible is the default.
1155          */
1156         mmc_set_bus_speed(card);
1157         return err;
1158 }
1159
1160 /*
1161  * Execute tuning sequence to seek the proper bus operating
1162  * conditions for HS200 and HS400, which sends CMD21 to the device.
1163  */
1164 static int mmc_hs200_tuning(struct mmc_card *card)
1165 {
1166         struct mmc_host *host = card->host;
1167
1168         /*
1169          * Timing should be adjusted to the HS400 target
1170          * operation frequency for tuning process
1171          */
1172         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1173             host->ios.bus_width == MMC_BUS_WIDTH_8)
1174                 if (host->ops->prepare_hs400_tuning)
1175                         host->ops->prepare_hs400_tuning(host, &host->ios);
1176
1177         return mmc_execute_tuning(card);
1178 }
1179
1180 /*
1181  * Handle the detection and initialisation of a card.
1182  *
1183  * In the case of a resume, "oldcard" will contain the card
1184  * we're trying to reinitialise.
1185  */
1186 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1187         struct mmc_card *oldcard)
1188 {
1189         struct mmc_card *card;
1190         int err;
1191         u32 cid[4];
1192         u32 rocr;
1193
1194         BUG_ON(!host);
1195         WARN_ON(!host->claimed);
1196
1197         /* Set correct bus mode for MMC before attempting init */
1198         if (!mmc_host_is_spi(host))
1199                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1200
1201         /*
1202          * Since we're changing the OCR value, we seem to
1203          * need to tell some cards to go back to the idle
1204          * state.  We wait 1ms to give cards time to
1205          * respond.
1206          * mmc_go_idle is needed for eMMC that are asleep
1207          */
1208         mmc_go_idle(host);
1209
1210         /* The extra bit indicates that we support high capacity */
1211         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1212         if (err)
1213                 goto err;
1214
1215         /*
1216          * For SPI, enable CRC as appropriate.
1217          */
1218         if (mmc_host_is_spi(host)) {
1219                 err = mmc_spi_set_crc(host, use_spi_crc);
1220                 if (err)
1221                         goto err;
1222         }
1223
1224         /*
1225          * Fetch CID from card.
1226          */
1227         if (mmc_host_is_spi(host))
1228                 err = mmc_send_cid(host, cid);
1229         else
1230                 err = mmc_all_send_cid(host, cid);
1231         if (err)
1232                 goto err;
1233
1234         if (oldcard) {
1235                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1236                         err = -ENOENT;
1237                         goto err;
1238                 }
1239
1240                 card = oldcard;
1241         } else {
1242                 /*
1243                  * Allocate card structure.
1244                  */
1245                 card = mmc_alloc_card(host, &mmc_type);
1246                 if (IS_ERR(card)) {
1247                         err = PTR_ERR(card);
1248                         goto err;
1249                 }
1250
1251                 card->ocr = ocr;
1252                 card->type = MMC_TYPE_MMC;
1253                 card->rca = 1;
1254                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1255         }
1256
1257         /*
1258          * Call the optional HC's init_card function to handle quirks.
1259          */
1260         if (host->ops->init_card)
1261                 host->ops->init_card(host, card);
1262
1263         /*
1264          * For native busses:  set card RCA and quit open drain mode.
1265          */
1266         if (!mmc_host_is_spi(host)) {
1267                 err = mmc_set_relative_addr(card);
1268                 if (err)
1269                         goto free_card;
1270
1271                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1272         }
1273
1274         if (!oldcard) {
1275                 /*
1276                  * Fetch CSD from card.
1277                  */
1278                 err = mmc_send_csd(card, card->raw_csd);
1279                 if (err)
1280                         goto free_card;
1281
1282                 err = mmc_decode_csd(card);
1283                 if (err)
1284                         goto free_card;
1285                 err = mmc_decode_cid(card);
1286                 if (err)
1287                         goto free_card;
1288         }
1289
1290         /*
1291          * handling only for cards supporting DSR and hosts requesting
1292          * DSR configuration
1293          */
1294         if (card->csd.dsr_imp && host->dsr_req)
1295                 mmc_set_dsr(host);
1296
1297         /*
1298          * Select card, as all following commands rely on that.
1299          */
1300         if (!mmc_host_is_spi(host)) {
1301                 err = mmc_select_card(card);
1302                 if (err)
1303                         goto free_card;
1304         }
1305
1306         if (!oldcard) {
1307                 /* Read extended CSD. */
1308                 err = mmc_read_ext_csd(card);
1309                 if (err)
1310                         goto free_card;
1311
1312                 /* If doing byte addressing, check if required to do sector
1313                  * addressing.  Handle the case of <2GB cards needing sector
1314                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
1315                  * ocr register has bit 30 set for sector addressing.
1316                  */
1317                 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1318                         mmc_card_set_blockaddr(card);
1319
1320                 /* Erase size depends on CSD and Extended CSD */
1321                 mmc_set_erase_size(card);
1322         }
1323
1324         /*
1325          * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1326          * bit.  This bit will be lost every time after a reset or power off.
1327          */
1328         if (card->ext_csd.partition_setting_completed ||
1329             (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1330                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1331                                  EXT_CSD_ERASE_GROUP_DEF, 1,
1332                                  card->ext_csd.generic_cmd6_time);
1333
1334                 if (err && err != -EBADMSG)
1335                         goto free_card;
1336
1337                 if (err) {
1338                         err = 0;
1339                         /*
1340                          * Just disable enhanced area off & sz
1341                          * will try to enable ERASE_GROUP_DEF
1342                          * during next time reinit
1343                          */
1344                         card->ext_csd.enhanced_area_offset = -EINVAL;
1345                         card->ext_csd.enhanced_area_size = -EINVAL;
1346                 } else {
1347                         card->ext_csd.erase_group_def = 1;
1348                         /*
1349                          * enable ERASE_GRP_DEF successfully.
1350                          * This will affect the erase size, so
1351                          * here need to reset erase size
1352                          */
1353                         mmc_set_erase_size(card);
1354                 }
1355         }
1356
1357         /*
1358          * Ensure eMMC user default partition is enabled
1359          */
1360         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1361                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1362                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1363                                  card->ext_csd.part_config,
1364                                  card->ext_csd.part_time);
1365                 if (err && err != -EBADMSG)
1366                         goto free_card;
1367         }
1368
1369         /*
1370          * Enable power_off_notification byte in the ext_csd register
1371          */
1372         if (card->ext_csd.rev >= 6) {
1373                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1374                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1375                                  EXT_CSD_POWER_ON,
1376                                  card->ext_csd.generic_cmd6_time);
1377                 if (err && err != -EBADMSG)
1378                         goto free_card;
1379
1380                 /*
1381                  * The err can be -EBADMSG or 0,
1382                  * so check for success and update the flag
1383                  */
1384                 if (!err)
1385                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1386         }
1387
1388         /*
1389          * Select timing interface
1390          */
1391         err = mmc_select_timing(card);
1392         if (err)
1393                 goto free_card;
1394
1395         if (mmc_card_hs200(card)) {
1396                 err = mmc_hs200_tuning(card);
1397                 if (err)
1398                         goto free_card;
1399
1400                 err = mmc_select_hs400(card);
1401                 if (err)
1402                         goto free_card;
1403         } else if (mmc_card_hs(card)) {
1404                 /* Select the desired bus width optionally */
1405                 err = mmc_select_bus_width(card);
1406                 if (!IS_ERR_VALUE(err)) {
1407                         err = mmc_select_hs_ddr(card);
1408                         if (err)
1409                                 goto free_card;
1410                 }
1411         }
1412
1413         /*
1414          * Choose the power class with selected bus interface
1415          */
1416         mmc_select_powerclass(card);
1417
1418         /*
1419          * Enable HPI feature (if supported)
1420          */
1421         if (card->ext_csd.hpi) {
1422                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1423                                 EXT_CSD_HPI_MGMT, 1,
1424                                 card->ext_csd.generic_cmd6_time);
1425                 if (err && err != -EBADMSG)
1426                         goto free_card;
1427                 if (err) {
1428                         pr_warn("%s: Enabling HPI failed\n",
1429                                 mmc_hostname(card->host));
1430                         err = 0;
1431                 } else
1432                         card->ext_csd.hpi_en = 1;
1433         }
1434
1435         /*
1436          * If cache size is higher than 0, this indicates
1437          * the existence of cache and it can be turned on.
1438          */
1439         if (card->ext_csd.cache_size > 0) {
1440                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1441                                 EXT_CSD_CACHE_CTRL, 1,
1442                                 card->ext_csd.generic_cmd6_time);
1443                 if (err && err != -EBADMSG)
1444                         goto free_card;
1445
1446                 /*
1447                  * Only if no error, cache is turned on successfully.
1448                  */
1449                 if (err) {
1450                         pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1451                                 mmc_hostname(card->host), err);
1452                         card->ext_csd.cache_ctrl = 0;
1453                         err = 0;
1454                 } else {
1455                         card->ext_csd.cache_ctrl = 1;
1456                 }
1457         }
1458
1459         /*
1460          * The mandatory minimum values are defined for packed command.
1461          * read: 5, write: 3
1462          */
1463         if (card->ext_csd.max_packed_writes >= 3 &&
1464             card->ext_csd.max_packed_reads >= 5 &&
1465             host->caps2 & MMC_CAP2_PACKED_CMD) {
1466                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1467                                 EXT_CSD_EXP_EVENTS_CTRL,
1468                                 EXT_CSD_PACKED_EVENT_EN,
1469                                 card->ext_csd.generic_cmd6_time);
1470                 if (err && err != -EBADMSG)
1471                         goto free_card;
1472                 if (err) {
1473                         pr_warn("%s: Enabling packed event failed\n",
1474                                 mmc_hostname(card->host));
1475                         card->ext_csd.packed_event_en = 0;
1476                         err = 0;
1477                 } else {
1478                         card->ext_csd.packed_event_en = 1;
1479                 }
1480         }
1481
1482         if (!oldcard)
1483                 host->card = card;
1484
1485         return 0;
1486
1487 free_card:
1488         if (!oldcard)
1489                 mmc_remove_card(card);
1490 err:
1491         return err;
1492 }
1493
1494 static int mmc_can_sleep(struct mmc_card *card)
1495 {
1496         return (card && card->ext_csd.rev >= 3);
1497 }
1498
1499 static int mmc_sleep(struct mmc_host *host)
1500 {
1501         struct mmc_command cmd = {0};
1502         struct mmc_card *card = host->card;
1503         unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1504         int err;
1505
1506         err = mmc_deselect_cards(host);
1507         if (err)
1508                 return err;
1509
1510         cmd.opcode = MMC_SLEEP_AWAKE;
1511         cmd.arg = card->rca << 16;
1512         cmd.arg |= 1 << 15;
1513
1514         /*
1515          * If the max_busy_timeout of the host is specified, validate it against
1516          * the sleep cmd timeout. A failure means we need to prevent the host
1517          * from doing hw busy detection, which is done by converting to a R1
1518          * response instead of a R1B.
1519          */
1520         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1521                 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1522         } else {
1523                 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1524                 cmd.busy_timeout = timeout_ms;
1525         }
1526
1527         err = mmc_wait_for_cmd(host, &cmd, 0);
1528         if (err)
1529                 return err;
1530
1531         /*
1532          * If the host does not wait while the card signals busy, then we will
1533          * will have to wait the sleep/awake timeout.  Note, we cannot use the
1534          * SEND_STATUS command to poll the status because that command (and most
1535          * others) is invalid while the card sleeps.
1536          */
1537         if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1538                 mmc_delay(timeout_ms);
1539
1540         return err;
1541 }
1542
1543 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1544 {
1545         return card &&
1546                 mmc_card_mmc(card) &&
1547                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1548 }
1549
1550 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1551 {
1552         unsigned int timeout = card->ext_csd.generic_cmd6_time;
1553         int err;
1554
1555         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1556         if (notify_type == EXT_CSD_POWER_OFF_LONG)
1557                 timeout = card->ext_csd.power_off_longtime;
1558
1559         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1560                         EXT_CSD_POWER_OFF_NOTIFICATION,
1561                         notify_type, timeout, true, false, false);
1562         if (err)
1563                 pr_err("%s: Power Off Notification timed out, %u\n",
1564                        mmc_hostname(card->host), timeout);
1565
1566         /* Disable the power off notification after the switch operation. */
1567         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1568
1569         return err;
1570 }
1571
1572 /*
1573  * Host is being removed. Free up the current card.
1574  */
1575 static void mmc_remove(struct mmc_host *host)
1576 {
1577         BUG_ON(!host);
1578         BUG_ON(!host->card);
1579
1580         mmc_remove_card(host->card);
1581         host->card = NULL;
1582 }
1583
1584 /*
1585  * Card detection - card is alive.
1586  */
1587 static int mmc_alive(struct mmc_host *host)
1588 {
1589         return mmc_send_status(host->card, NULL);
1590 }
1591
1592 /*
1593  * Card detection callback from host.
1594  */
1595 static void mmc_detect(struct mmc_host *host)
1596 {
1597         int err;
1598
1599         BUG_ON(!host);
1600         BUG_ON(!host->card);
1601
1602         mmc_get_card(host->card);
1603
1604         /*
1605          * Just check if our card has been removed.
1606          */
1607         err = _mmc_detect_card_removed(host);
1608
1609         mmc_put_card(host->card);
1610
1611         if (err) {
1612                 mmc_remove(host);
1613
1614                 mmc_claim_host(host);
1615                 mmc_detach_bus(host);
1616                 mmc_power_off(host);
1617                 mmc_release_host(host);
1618         }
1619 }
1620
1621 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1622 {
1623         int err = 0;
1624         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1625                                         EXT_CSD_POWER_OFF_LONG;
1626
1627         BUG_ON(!host);
1628         BUG_ON(!host->card);
1629
1630         mmc_claim_host(host);
1631
1632         if (mmc_card_suspended(host->card))
1633                 goto out;
1634
1635         if (mmc_card_doing_bkops(host->card)) {
1636                 err = mmc_stop_bkops(host->card);
1637                 if (err)
1638                         goto out;
1639         }
1640
1641         err = mmc_flush_cache(host->card);
1642         if (err)
1643                 goto out;
1644
1645         if (mmc_can_poweroff_notify(host->card) &&
1646                 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1647                 err = mmc_poweroff_notify(host->card, notify_type);
1648         else if (mmc_can_sleep(host->card))
1649                 err = mmc_sleep(host);
1650         else if (!mmc_host_is_spi(host))
1651                 err = mmc_deselect_cards(host);
1652
1653         if (!err) {
1654                 mmc_power_off(host);
1655                 mmc_card_set_suspended(host->card);
1656         }
1657 out:
1658         mmc_release_host(host);
1659         return err;
1660 }
1661
1662 /*
1663  * Suspend callback
1664  */
1665 static int mmc_suspend(struct mmc_host *host)
1666 {
1667         int err;
1668
1669         err = _mmc_suspend(host, true);
1670         if (!err) {
1671                 pm_runtime_disable(&host->card->dev);
1672                 pm_runtime_set_suspended(&host->card->dev);
1673         }
1674
1675         return err;
1676 }
1677
1678 /*
1679  * This function tries to determine if the same card is still present
1680  * and, if so, restore all state to it.
1681  */
1682 static int _mmc_resume(struct mmc_host *host)
1683 {
1684         int err = 0;
1685
1686         BUG_ON(!host);
1687         BUG_ON(!host->card);
1688
1689         mmc_claim_host(host);
1690
1691         if (!mmc_card_suspended(host->card))
1692                 goto out;
1693
1694         mmc_power_up(host, host->card->ocr);
1695         err = mmc_init_card(host, host->card->ocr, host->card);
1696         mmc_card_clr_suspended(host->card);
1697
1698 out:
1699         mmc_release_host(host);
1700         return err;
1701 }
1702
1703 /*
1704  * Shutdown callback
1705  */
1706 static int mmc_shutdown(struct mmc_host *host)
1707 {
1708         int err = 0;
1709
1710         /*
1711          * In a specific case for poweroff notify, we need to resume the card
1712          * before we can shutdown it properly.
1713          */
1714         if (mmc_can_poweroff_notify(host->card) &&
1715                 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1716                 err = _mmc_resume(host);
1717
1718         if (!err)
1719                 err = _mmc_suspend(host, false);
1720
1721         return err;
1722 }
1723
1724 /*
1725  * Callback for resume.
1726  */
1727 static int mmc_resume(struct mmc_host *host)
1728 {
1729         int err = 0;
1730
1731         if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1732                 err = _mmc_resume(host);
1733                 pm_runtime_set_active(&host->card->dev);
1734                 pm_runtime_mark_last_busy(&host->card->dev);
1735         }
1736         pm_runtime_enable(&host->card->dev);
1737
1738         return err;
1739 }
1740
1741 /*
1742  * Callback for runtime_suspend.
1743  */
1744 static int mmc_runtime_suspend(struct mmc_host *host)
1745 {
1746         int err;
1747
1748         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1749                 return 0;
1750
1751         err = _mmc_suspend(host, true);
1752         if (err)
1753                 pr_err("%s: error %d doing aggessive suspend\n",
1754                         mmc_hostname(host), err);
1755
1756         return err;
1757 }
1758
1759 /*
1760  * Callback for runtime_resume.
1761  */
1762 static int mmc_runtime_resume(struct mmc_host *host)
1763 {
1764         int err;
1765
1766         if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1767                 return 0;
1768
1769         err = _mmc_resume(host);
1770         if (err)
1771                 pr_err("%s: error %d doing aggessive resume\n",
1772                         mmc_hostname(host), err);
1773
1774         return 0;
1775 }
1776
1777 static int mmc_power_restore(struct mmc_host *host)
1778 {
1779         int ret;
1780
1781         mmc_claim_host(host);
1782         ret = mmc_init_card(host, host->card->ocr, host->card);
1783         mmc_release_host(host);
1784
1785         return ret;
1786 }
1787
1788 int mmc_can_reset(struct mmc_card *card)
1789 {
1790         u8 rst_n_function;
1791
1792         rst_n_function = card->ext_csd.rst_n_function;
1793         if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
1794                 return 0;
1795         return 1;
1796 }
1797 EXPORT_SYMBOL(mmc_can_reset);
1798
1799 static int mmc_reset(struct mmc_host *host)
1800 {
1801         struct mmc_card *card = host->card;
1802         u32 status;
1803
1804         if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
1805                 return -EOPNOTSUPP;
1806
1807         if (!mmc_can_reset(card))
1808                 return -EOPNOTSUPP;
1809
1810         mmc_host_clk_hold(host);
1811         mmc_set_clock(host, host->f_init);
1812
1813         host->ops->hw_reset(host);
1814
1815         /* If the reset has happened, then a status command will fail */
1816         if (!mmc_send_status(card, &status)) {
1817                 mmc_host_clk_release(host);
1818                 return -ENOSYS;
1819         }
1820
1821         /* Set initial state and call mmc_set_ios */
1822         mmc_set_initial_state(host);
1823         mmc_host_clk_release(host);
1824
1825         return mmc_power_restore(host);
1826 }
1827
1828 static const struct mmc_bus_ops mmc_ops = {
1829         .remove = mmc_remove,
1830         .detect = mmc_detect,
1831         .suspend = mmc_suspend,
1832         .resume = mmc_resume,
1833         .runtime_suspend = mmc_runtime_suspend,
1834         .runtime_resume = mmc_runtime_resume,
1835         .power_restore = mmc_power_restore,
1836         .alive = mmc_alive,
1837         .shutdown = mmc_shutdown,
1838         .reset = mmc_reset,
1839 };
1840
1841 /*
1842  * Starting point for MMC card init.
1843  */
1844 int mmc_attach_mmc(struct mmc_host *host)
1845 {
1846         int err;
1847         u32 ocr, rocr;
1848
1849         BUG_ON(!host);
1850         WARN_ON(!host->claimed);
1851
1852         /* Set correct bus mode for MMC before attempting attach */
1853         if (!mmc_host_is_spi(host))
1854                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1855
1856         err = mmc_send_op_cond(host, 0, &ocr);
1857         if (err)
1858                 return err;
1859
1860         mmc_attach_bus(host, &mmc_ops);
1861         if (host->ocr_avail_mmc)
1862                 host->ocr_avail = host->ocr_avail_mmc;
1863
1864         /*
1865          * We need to get OCR a different way for SPI.
1866          */
1867         if (mmc_host_is_spi(host)) {
1868                 err = mmc_spi_read_ocr(host, 1, &ocr);
1869                 if (err)
1870                         goto err;
1871         }
1872
1873         rocr = mmc_select_voltage(host, ocr);
1874
1875         /*
1876          * Can we support the voltage of the card?
1877          */
1878         if (!rocr) {
1879                 err = -EINVAL;
1880                 goto err;
1881         }
1882
1883         /*
1884          * Detect and init the card.
1885          */
1886         err = mmc_init_card(host, rocr, NULL);
1887         if (err)
1888                 goto err;
1889
1890         mmc_release_host(host);
1891         err = mmc_add_card(host->card);
1892         mmc_claim_host(host);
1893         if (err)
1894                 goto remove_card;
1895
1896         return 0;
1897
1898 remove_card:
1899         mmc_release_host(host);
1900         mmc_remove_card(host->card);
1901         mmc_claim_host(host);
1902         host->card = NULL;
1903 err:
1904         mmc_detach_bus(host);
1905
1906         pr_err("%s: error %d whilst initialising MMC card\n",
1907                 mmc_hostname(host), err);
1908
1909         return err;
1910 }