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.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
 487                         card->ext_csd.raw_bkops_status =
 488                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 489                         if (!card->ext_csd.bkops_en)
 490                                 pr_info("%s: BKOPS_EN bit is not set\n",
 491                                         mmc_hostname(card->host));
 492                 }
 493
 494                 /* check whether the eMMC card supports HPI */
 495                 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
 496                         card->ext_csd.hpi = 1;
 497                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 498                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 499                         else
 500                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 501                         /*
 502                          * Indicate the maximum timeout to close
 503                          * a command interrupted by HPI
 504                          */
 505                         card->ext_csd.out_of_int_time =
 506                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 507                 }
 508
 509                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 510                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 511
 512                 /*
 513                  * RPMB regions are defined in multiples of 128K.
 514                  */
 515                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 516                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 517                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 518                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 519                                 "rpmb", 0, false,
 520                                 MMC_BLK_DATA_AREA_RPMB);
 521                 }
 522         }
 523
 524         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 525         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 526                 card->erased_byte = 0xFF;
 527         else
 528                 card->erased_byte = 0x0;
 529
 530         /* eMMC v4.5 or later */
 531         if (card->ext_csd.rev >= 6) {
 532                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 533
 534                 card->ext_csd.generic_cmd6_time = 10 *
 535                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 536                 card->ext_csd.power_off_longtime = 10 *
 537                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 538
 539                 card->ext_csd.cache_size =
 540                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 541                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 542                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 543                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 544
 545                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 546                         card->ext_csd.data_sector_size = 4096;
 547                 else
 548                         card->ext_csd.data_sector_size = 512;
 549
 550                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 551                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 552                         card->ext_csd.data_tag_unit_size =
 553                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 554                         (card->ext_csd.data_sector_size);
 555                 } else {
 556                         card->ext_csd.data_tag_unit_size = 0;
 557                 }
 558
 559                 card->ext_csd.max_packed_writes =
 560                         ext_csd[EXT_CSD_MAX_PACKED_WRITES];
 561                 card->ext_csd.max_packed_reads =
 562                         ext_csd[EXT_CSD_MAX_PACKED_READS];
 563         } else {
 564                 card->ext_csd.data_sector_size = 512;
 565         }
 566
 567         /* eMMC v5 or later */
 568         if (card->ext_csd.rev >= 7) {
 569                 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
 570                        MMC_FIRMWARE_LEN);
 571                 card->ext_csd.ffu_capable =
 572                         (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
 573                         !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
 574         }
 575 out:
 576         return err;
 577 }
 578
 579 static int mmc_read_ext_csd(struct mmc_card *card)
 580 {
 581         u8 *ext_csd;
 582         int err;
 583
 584         if (!mmc_can_ext_csd(card))
 585                 return 0;
 586
 587         err = mmc_get_ext_csd(card, &ext_csd);
 588         if (err) {
 589                 /* If the host or the card can't do the switch,
 590                  * fail more gracefully. */
 591                 if ((err != -EINVAL)
 592                  && (err != -ENOSYS)
 593                  && (err != -EFAULT))
 594                         return err;
 595
 596                 /*
 597                  * High capacity cards should have this "magic" size
 598                  * stored in their CSD.
 599                  */
 600                 if (card->csd.capacity == (4096 * 512)) {
 601                         pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
 602                                 mmc_hostname(card->host));
 603                 } else {
 604                         pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
 605                                 mmc_hostname(card->host));
 606                         err = 0;
 607                 }
 608
 609                 return err;
 610         }
 611
 612         err = mmc_decode_ext_csd(card, ext_csd);
 613         kfree(ext_csd);
 614         return err;
 615 }
 616
 617 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 618 {
 619         u8 *bw_ext_csd;
 620         int err;
 621
 622         if (bus_width == MMC_BUS_WIDTH_1)
 623                 return 0;
 624
 625         err = mmc_get_ext_csd(card, &bw_ext_csd);
 626         if (err)
 627                 return err;
 628
 629         /* only compare read only fields */
 630         err = !((card->ext_csd.raw_partition_support ==
 631                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 632                 (card->ext_csd.raw_erased_mem_count ==
 633                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 634                 (card->ext_csd.rev ==
 635                         bw_ext_csd[EXT_CSD_REV]) &&
 636                 (card->ext_csd.raw_ext_csd_structure ==
 637                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 638                 (card->ext_csd.raw_card_type ==
 639                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 640                 (card->ext_csd.raw_s_a_timeout ==
 641                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 642                 (card->ext_csd.raw_hc_erase_gap_size ==
 643                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 644                 (card->ext_csd.raw_erase_timeout_mult ==
 645                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 646                 (card->ext_csd.raw_hc_erase_grp_size ==
 647                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 648                 (card->ext_csd.raw_sec_trim_mult ==
 649                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 650                 (card->ext_csd.raw_sec_erase_mult ==
 651                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 652                 (card->ext_csd.raw_sec_feature_support ==
 653                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 654                 (card->ext_csd.raw_trim_mult ==
 655                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 656                 (card->ext_csd.raw_sectors[0] ==
 657                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 658                 (card->ext_csd.raw_sectors[1] ==
 659                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 660                 (card->ext_csd.raw_sectors[2] ==
 661                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 662                 (card->ext_csd.raw_sectors[3] ==
 663                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
 664                 (card->ext_csd.raw_pwr_cl_52_195 ==
 665                         bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
 666                 (card->ext_csd.raw_pwr_cl_26_195 ==
 667                         bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
 668                 (card->ext_csd.raw_pwr_cl_52_360 ==
 669                         bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
 670                 (card->ext_csd.raw_pwr_cl_26_360 ==
 671                         bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
 672                 (card->ext_csd.raw_pwr_cl_200_195 ==
 673                         bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
 674                 (card->ext_csd.raw_pwr_cl_200_360 ==
 675                         bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
 676                 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
 677                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
 678                 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
 679                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
 680                 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
 681                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
 682
 683         if (err)
 684                 err = -EINVAL;
 685
 686         kfree(bw_ext_csd);
 687         return err;
 688 }
 689
 690 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 691         card->raw_cid[2], card->raw_cid[3]);
 692 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 693         card->raw_csd[2], card->raw_csd[3]);
 694 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 695 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 696 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 697 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
 698 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 699 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 700 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 701 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 702 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
 703 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 704 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 705                 card->ext_csd.enhanced_area_offset);
 706 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 707 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 708 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 709
 710 static ssize_t mmc_fwrev_show(struct device *dev,
 711                               struct device_attribute *attr,
 712                               char *buf)
 713 {
 714         struct mmc_card *card = mmc_dev_to_card(dev);
 715
 716         if (card->ext_csd.rev < 7) {
 717                 return sprintf(buf, "0x%x\n", card->cid.fwrev);
 718         } else {
 719                 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
 720                                card->ext_csd.fwrev);
 721         }
 722 }
 723
 724 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
 725
 726 static struct attribute *mmc_std_attrs[] = {
 727         &dev_attr_cid.attr,
 728         &dev_attr_csd.attr,
 729         &dev_attr_date.attr,
 730         &dev_attr_erase_size.attr,
 731         &dev_attr_preferred_erase_size.attr,
 732         &dev_attr_fwrev.attr,
 733         &dev_attr_ffu_capable.attr,
 734         &dev_attr_hwrev.attr,
 735         &dev_attr_manfid.attr,
 736         &dev_attr_name.attr,
 737         &dev_attr_oemid.attr,
 738         &dev_attr_prv.attr,
 739         &dev_attr_serial.attr,
 740         &dev_attr_enhanced_area_offset.attr,
 741         &dev_attr_enhanced_area_size.attr,
 742         &dev_attr_raw_rpmb_size_mult.attr,
 743         &dev_attr_rel_sectors.attr,
 744         NULL,
 745 };
 746 ATTRIBUTE_GROUPS(mmc_std);
 747
 748 static struct device_type mmc_type = {
 749         .groups = mmc_std_groups,
 750 };
 751
 752 /*
 753  * Select the PowerClass for the current bus width
 754  * If power class is defined for 4/8 bit bus in the
 755  * extended CSD register, select it by executing the
 756  * mmc_switch command.
 757  */
 758 static int __mmc_select_powerclass(struct mmc_card *card,
 759                                    unsigned int bus_width)
 760 {
 761         struct mmc_host *host = card->host;
 762         struct mmc_ext_csd *ext_csd = &card->ext_csd;
 763         unsigned int pwrclass_val = 0;
 764         int err = 0;
 765
 766         switch (1 << host->ios.vdd) {
 767         case MMC_VDD_165_195:
 768                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 769                         pwrclass_val = ext_csd->raw_pwr_cl_26_195;
 770                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 771                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 772                                 ext_csd->raw_pwr_cl_52_195 :
 773                                 ext_csd->raw_pwr_cl_ddr_52_195;
 774                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 775                         pwrclass_val = ext_csd->raw_pwr_cl_200_195;
 776                 break;
 777         case MMC_VDD_27_28:
 778         case MMC_VDD_28_29:
 779         case MMC_VDD_29_30:
 780         case MMC_VDD_30_31:
 781         case MMC_VDD_31_32:
 782         case MMC_VDD_32_33:
 783         case MMC_VDD_33_34:
 784         case MMC_VDD_34_35:
 785         case MMC_VDD_35_36:
 786                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 787                         pwrclass_val = ext_csd->raw_pwr_cl_26_360;
 788                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 789                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 790                                 ext_csd->raw_pwr_cl_52_360 :
 791                                 ext_csd->raw_pwr_cl_ddr_52_360;
 792                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 793                         pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
 794                                 ext_csd->raw_pwr_cl_ddr_200_360 :
 795                                 ext_csd->raw_pwr_cl_200_360;
 796                 break;
 797         default:
 798                 pr_warn("%s: Voltage range not supported for power class\n",
 799                         mmc_hostname(host));
 800                 return -EINVAL;
 801         }
 802
 803         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 804                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 805                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 806         else
 807                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 808                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 809
 810         /* If the power class is different from the default value */
 811         if (pwrclass_val > 0) {
 812                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 813                                  EXT_CSD_POWER_CLASS,
 814                                  pwrclass_val,
 815                                  card->ext_csd.generic_cmd6_time);
 816         }
 817
 818         return err;
 819 }
 820
 821 static int mmc_select_powerclass(struct mmc_card *card)
 822 {
 823         struct mmc_host *host = card->host;
 824         u32 bus_width, ext_csd_bits;
 825         int err, ddr;
 826
 827         /* Power class selection is supported for versions >= 4.0 */
 828         if (!mmc_can_ext_csd(card))
 829                 return 0;
 830
 831         bus_width = host->ios.bus_width;
 832         /* Power class values are defined only for 4/8 bit bus */
 833         if (bus_width == MMC_BUS_WIDTH_1)
 834                 return 0;
 835
 836         ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
 837         if (ddr)
 838                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 839                         EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 840         else
 841                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 842                         EXT_CSD_BUS_WIDTH_8 :  EXT_CSD_BUS_WIDTH_4;
 843
 844         err = __mmc_select_powerclass(card, ext_csd_bits);
 845         if (err)
 846                 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
 847                         mmc_hostname(host), 1 << bus_width, ddr);
 848
 849         return err;
 850 }
 851
 852 /*
 853  * Set the bus speed for the selected speed mode.
 854  */
 855 static void mmc_set_bus_speed(struct mmc_card *card)
 856 {
 857         unsigned int max_dtr = (unsigned int)-1;
 858
 859         if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
 860              max_dtr > card->ext_csd.hs200_max_dtr)
 861                 max_dtr = card->ext_csd.hs200_max_dtr;
 862         else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
 863                 max_dtr = card->ext_csd.hs_max_dtr;
 864         else if (max_dtr > card->csd.max_dtr)
 865                 max_dtr = card->csd.max_dtr;
 866
 867         mmc_set_clock(card->host, max_dtr);
 868 }
 869
 870 /*
 871  * Select the bus width amoung 4-bit and 8-bit(SDR).
 872  * If the bus width is changed successfully, return the selected width value.
 873  * Zero is returned instead of error value if the wide width is not supported.
 874  */
 875 static int mmc_select_bus_width(struct mmc_card *card)
 876 {
 877         static unsigned ext_csd_bits[] = {
 878                 EXT_CSD_BUS_WIDTH_8,
 879                 EXT_CSD_BUS_WIDTH_4,
 880         };
 881         static unsigned bus_widths[] = {
 882                 MMC_BUS_WIDTH_8,
 883                 MMC_BUS_WIDTH_4,
 884         };
 885         struct mmc_host *host = card->host;
 886         unsigned idx, bus_width = 0;
 887         int err = 0;
 888
 889         if (!mmc_can_ext_csd(card) ||
 890             !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
 891                 return 0;
 892
 893         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
 894
 895         /*
 896          * Unlike SD, MMC cards dont have a configuration register to notify
 897          * supported bus width. So bus test command should be run to identify
 898          * the supported bus width or compare the ext csd values of current
 899          * bus width and ext csd values of 1 bit mode read earlier.
 900          */
 901         for (; idx < ARRAY_SIZE(bus_widths); idx++) {
 902                 /*
 903                  * Host is capable of 8bit transfer, then switch
 904                  * the device to work in 8bit transfer mode. If the
 905                  * mmc switch command returns error then switch to
 906                  * 4bit transfer mode. On success set the corresponding
 907                  * bus width on the host.
 908                  */
 909                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 910                                  EXT_CSD_BUS_WIDTH,
 911                                  ext_csd_bits[idx],
 912                                  card->ext_csd.generic_cmd6_time);
 913                 if (err)
 914                         continue;
 915
 916                 bus_width = bus_widths[idx];
 917                 mmc_set_bus_width(host, bus_width);
 918
 919                 /*
 920                  * If controller can't handle bus width test,
 921                  * compare ext_csd previously read in 1 bit mode
 922                  * against ext_csd at new bus width
 923                  */
 924                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
 925                         err = mmc_compare_ext_csds(card, bus_width);
 926                 else
 927                         err = mmc_bus_test(card, bus_width);
 928
 929                 if (!err) {
 930                         err = bus_width;
 931                         break;
 932                 } else {
 933                         pr_warn("%s: switch to bus width %d failed\n",
 934                                 mmc_hostname(host), ext_csd_bits[idx]);
 935                 }
 936         }
 937
 938         return err;
 939 }
 940
 941 /*
 942  * Switch to the high-speed mode
 943  */
 944 static int mmc_select_hs(struct mmc_card *card)
 945 {
 946         int err;
 947
 948         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 949                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
 950                            card->ext_csd.generic_cmd6_time,
 951                            true, true, true);
 952         if (!err)
 953                 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
 954
 955         return err;
 956 }
 957
 958 /*
 959  * Activate wide bus and DDR if supported.
 960  */
 961 static int mmc_select_hs_ddr(struct mmc_card *card)
 962 {
 963         struct mmc_host *host = card->host;
 964         u32 bus_width, ext_csd_bits;
 965         int err = 0;
 966
 967         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
 968                 return 0;
 969
 970         bus_width = host->ios.bus_width;
 971         if (bus_width == MMC_BUS_WIDTH_1)
 972                 return 0;
 973
 974         ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 975                 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 976
 977         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 978                         EXT_CSD_BUS_WIDTH,
 979                         ext_csd_bits,
 980                         card->ext_csd.generic_cmd6_time);
 981         if (err) {
 982                 pr_err("%s: switch to bus width %d ddr failed\n",
 983                         mmc_hostname(host), 1 << bus_width);
 984                 return err;
 985         }
 986
 987         /*
 988          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
 989          * signaling.
 990          *
 991          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
 992          *
 993          * 1.8V vccq at 3.3V core voltage (vcc) is not required
 994          * in the JEDEC spec for DDR.
 995          *
 996          * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
 997          * host controller can support this, like some of the SDHCI
 998          * controller which connect to an eMMC device. Some of these
 999          * host controller still needs to use 1.8v vccq for supporting
1000          * DDR mode.
1001          *
1002          * So the sequence will be:
1003          * if (host and device can both support 1.2v IO)
1004          *      use 1.2v IO;
1005          * else if (host and device can both support 1.8v IO)
1006          *      use 1.8v IO;
1007          * so if host and device can only support 3.3v IO, this is the
1008          * last choice.
1009          *
1010          * WARNING: eMMC rules are NOT the same as SD DDR
1011          */
1012         err = -EINVAL;
1013         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1014                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1015
1016         if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1017                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1018
1019         /* make sure vccq is 3.3v after switching disaster */
1020         if (err)
1021                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1022
1023         if (!err)
1024                 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1025
1026         return err;
1027 }
1028
1029 static int mmc_select_hs400(struct mmc_card *card)
1030 {
1031         struct mmc_host *host = card->host;
1032         int err = 0;
1033
1034         /*
1035          * HS400 mode requires 8-bit bus width
1036          */
1037         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1038               host->ios.bus_width == MMC_BUS_WIDTH_8))
1039                 return 0;
1040
1041         /*
1042          * Before switching to dual data rate operation for HS400,
1043          * it is required to convert from HS200 mode to HS mode.
1044          */
1045         mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1046         mmc_set_bus_speed(card);
1047
1048         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1049                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1050                            card->ext_csd.generic_cmd6_time,
1051                            true, true, true);
1052         if (err) {
1053                 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1054                         mmc_hostname(host), err);
1055                 return err;
1056         }
1057
1058         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1059                          EXT_CSD_BUS_WIDTH,
1060                          EXT_CSD_DDR_BUS_WIDTH_8,
1061                          card->ext_csd.generic_cmd6_time);
1062         if (err) {
1063                 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1064                         mmc_hostname(host), err);
1065                 return err;
1066         }
1067
1068         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1069                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS400,
1070                            card->ext_csd.generic_cmd6_time,
1071                            true, true, true);
1072         if (err) {
1073                 pr_err("%s: switch to hs400 failed, err:%d\n",
1074                          mmc_hostname(host), err);
1075                 return err;
1076         }
1077
1078         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1079         mmc_set_bus_speed(card);
1080
1081         return 0;
1082 }
1083
1084 /*
1085  * For device supporting HS200 mode, the following sequence
1086  * should be done before executing the tuning process.
1087  * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1088  * 2. switch to HS200 mode
1089  * 3. set the clock to > 52Mhz and <=200MHz
1090  */
1091 static int mmc_select_hs200(struct mmc_card *card)
1092 {
1093         struct mmc_host *host = card->host;
1094         int err = -EINVAL;
1095
1096         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1097                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1098
1099         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1100                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1101
1102         /* If fails try again during next card power cycle */
1103         if (err)
1104                 goto err;
1105
1106         /*
1107          * Set the bus width(4 or 8) with host's support and
1108          * switch to HS200 mode if bus width is set successfully.
1109          */
1110         err = mmc_select_bus_width(card);
1111         if (!IS_ERR_VALUE(err)) {
1112                 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1113                                    EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS200,
1114                                    card->ext_csd.generic_cmd6_time,
1115                                    true, true, true);
1116                 if (!err)
1117                         mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1118         }
1119 err:
1120         return err;
1121 }
1122
1123 /*
1124  * Activate High Speed or HS200 mode if supported.
1125  */
1126 static int mmc_select_timing(struct mmc_card *card)
1127 {
1128         int err = 0;
1129
1130         if (!mmc_can_ext_csd(card))
1131                 goto bus_speed;
1132
1133         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1134                 err = mmc_select_hs200(card);
1135         else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1136                 err = mmc_select_hs(card);
1137
1138         if (err && err != -EBADMSG)
1139                 return err;
1140
1141         if (err) {
1142                 pr_warn("%s: switch to %s failed\n",
1143                         mmc_card_hs(card) ? "high-speed" :
1144                         (mmc_card_hs200(card) ? "hs200" : ""),
1145                         mmc_hostname(card->host));
1146                 err = 0;
1147         }
1148
1149 bus_speed:
1150         /*
1151          * Set the bus speed to the selected bus timing.
1152          * If timing is not selected, backward compatible is the default.
1153          */
1154         mmc_set_bus_speed(card);
1155         return err;
1156 }
1157
1158 /*
1159  * Execute tuning sequence to seek the proper bus operating
1160  * conditions for HS200 and HS400, which sends CMD21 to the device.
1161  */
1162 static int mmc_hs200_tuning(struct mmc_card *card)
1163 {
1164         struct mmc_host *host = card->host;
1165         int err = 0;
1166
1167         /*
1168          * Timing should be adjusted to the HS400 target
1169          * operation frequency for tuning process
1170          */
1171         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1172             host->ios.bus_width == MMC_BUS_WIDTH_8)
1173                 if (host->ops->prepare_hs400_tuning)
1174                         host->ops->prepare_hs400_tuning(host, &host->ios);
1175
1176         if (host->ops->execute_tuning) {
1177                 mmc_host_clk_hold(host);
1178                 err = host->ops->execute_tuning(host,
1179                                 MMC_SEND_TUNING_BLOCK_HS200);
1180                 mmc_host_clk_release(host);
1181
1182                 if (err)
1183                         pr_err("%s: tuning execution failed\n",
1184                                 mmc_hostname(host));
1185         }
1186
1187         return err;
1188 }
1189
1190 /*
1191  * Handle the detection and initialisation of a card.
1192  *
1193  * In the case of a resume, "oldcard" will contain the card
1194  * we're trying to reinitialise.
1195  */
1196 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1197         struct mmc_card *oldcard)
1198 {
1199         struct mmc_card *card;
1200         int err;
1201         u32 cid[4];
1202         u32 rocr;
1203
1204         BUG_ON(!host);
1205         WARN_ON(!host->claimed);
1206
1207         /* Set correct bus mode for MMC before attempting init */
1208         if (!mmc_host_is_spi(host))
1209                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1210
1211         /*
1212          * Since we're changing the OCR value, we seem to
1213          * need to tell some cards to go back to the idle
1214          * state.  We wait 1ms to give cards time to
1215          * respond.
1216          * mmc_go_idle is needed for eMMC that are asleep
1217          */
1218         mmc_go_idle(host);
1219
1220         /* The extra bit indicates that we support high capacity */
1221         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1222         if (err)
1223                 goto err;
1224
1225         /*
1226          * For SPI, enable CRC as appropriate.
1227          */
1228         if (mmc_host_is_spi(host)) {
1229                 err = mmc_spi_set_crc(host, use_spi_crc);
1230                 if (err)
1231                         goto err;
1232         }
1233
1234         /*
1235          * Fetch CID from card.
1236          */
1237         if (mmc_host_is_spi(host))
1238                 err = mmc_send_cid(host, cid);
1239         else
1240                 err = mmc_all_send_cid(host, cid);
1241         if (err)
1242                 goto err;
1243
1244         if (oldcard) {
1245                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1246                         err = -ENOENT;
1247                         goto err;
1248                 }
1249
1250                 card = oldcard;
1251         } else {
1252                 /*
1253                  * Allocate card structure.
1254                  */
1255                 card = mmc_alloc_card(host, &mmc_type);
1256                 if (IS_ERR(card)) {
1257                         err = PTR_ERR(card);
1258                         goto err;
1259                 }
1260
1261                 card->ocr = ocr;
1262                 card->type = MMC_TYPE_MMC;
1263                 card->rca = 1;
1264                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1265         }
1266
1267         /*
1268          * Call the optional HC's init_card function to handle quirks.
1269          */
1270         if (host->ops->init_card)
1271                 host->ops->init_card(host, card);
1272
1273         /*
1274          * For native busses:  set card RCA and quit open drain mode.
1275          */
1276         if (!mmc_host_is_spi(host)) {
1277                 err = mmc_set_relative_addr(card);
1278                 if (err)
1279                         goto free_card;
1280
1281                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1282         }
1283
1284         if (!oldcard) {
1285                 /*
1286                  * Fetch CSD from card.
1287                  */
1288                 err = mmc_send_csd(card, card->raw_csd);
1289                 if (err)
1290                         goto free_card;
1291
1292                 err = mmc_decode_csd(card);
1293                 if (err)
1294                         goto free_card;
1295                 err = mmc_decode_cid(card);
1296                 if (err)
1297                         goto free_card;
1298         }
1299
1300         /*
1301          * handling only for cards supporting DSR and hosts requesting
1302          * DSR configuration
1303          */
1304         if (card->csd.dsr_imp && host->dsr_req)
1305                 mmc_set_dsr(host);
1306
1307         /*
1308          * Select card, as all following commands rely on that.
1309          */
1310         if (!mmc_host_is_spi(host)) {
1311                 err = mmc_select_card(card);
1312                 if (err)
1313                         goto free_card;
1314         }
1315
1316         if (!oldcard) {
1317                 /* Read extended CSD. */
1318                 err = mmc_read_ext_csd(card);
1319                 if (err)
1320                         goto free_card;
1321
1322                 /* If doing byte addressing, check if required to do sector
1323                  * addressing.  Handle the case of <2GB cards needing sector
1324                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
1325                  * ocr register has bit 30 set for sector addressing.
1326                  */
1327                 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1328                         mmc_card_set_blockaddr(card);
1329
1330                 /* Erase size depends on CSD and Extended CSD */
1331                 mmc_set_erase_size(card);
1332         }
1333
1334         /*
1335          * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1336          * bit.  This bit will be lost every time after a reset or power off.
1337          */
1338         if (card->ext_csd.partition_setting_completed ||
1339             (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1340                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1341                                  EXT_CSD_ERASE_GROUP_DEF, 1,
1342                                  card->ext_csd.generic_cmd6_time);
1343
1344                 if (err && err != -EBADMSG)
1345                         goto free_card;
1346
1347                 if (err) {
1348                         err = 0;
1349                         /*
1350                          * Just disable enhanced area off & sz
1351                          * will try to enable ERASE_GROUP_DEF
1352                          * during next time reinit
1353                          */
1354                         card->ext_csd.enhanced_area_offset = -EINVAL;
1355                         card->ext_csd.enhanced_area_size = -EINVAL;
1356                 } else {
1357                         card->ext_csd.erase_group_def = 1;
1358                         /*
1359                          * enable ERASE_GRP_DEF successfully.
1360                          * This will affect the erase size, so
1361                          * here need to reset erase size
1362                          */
1363                         mmc_set_erase_size(card);
1364                 }
1365         }
1366
1367         /*
1368          * Ensure eMMC user default partition is enabled
1369          */
1370         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1371                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1372                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1373                                  card->ext_csd.part_config,
1374                                  card->ext_csd.part_time);
1375                 if (err && err != -EBADMSG)
1376                         goto free_card;
1377         }
1378
1379         /*
1380          * Enable power_off_notification byte in the ext_csd register
1381          */
1382         if (card->ext_csd.rev >= 6) {
1383                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1384                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1385                                  EXT_CSD_POWER_ON,
1386                                  card->ext_csd.generic_cmd6_time);
1387                 if (err && err != -EBADMSG)
1388                         goto free_card;
1389
1390                 /*
1391                  * The err can be -EBADMSG or 0,
1392                  * so check for success and update the flag
1393                  */
1394                 if (!err)
1395                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1396         }
1397
1398         /*
1399          * Select timing interface
1400          */
1401         err = mmc_select_timing(card);
1402         if (err)
1403                 goto free_card;
1404
1405         if (mmc_card_hs200(card)) {
1406                 err = mmc_hs200_tuning(card);
1407                 if (err)
1408                         goto free_card;
1409
1410                 err = mmc_select_hs400(card);
1411                 if (err)
1412                         goto free_card;
1413         } else if (mmc_card_hs(card)) {
1414                 /* Select the desired bus width optionally */
1415                 err = mmc_select_bus_width(card);
1416                 if (!IS_ERR_VALUE(err)) {
1417                         err = mmc_select_hs_ddr(card);
1418                         if (err)
1419                                 goto free_card;
1420                 }
1421         }
1422
1423         /*
1424          * Choose the power class with selected bus interface
1425          */
1426         mmc_select_powerclass(card);
1427
1428         /*
1429          * Enable HPI feature (if supported)
1430          */
1431         if (card->ext_csd.hpi) {
1432                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1433                                 EXT_CSD_HPI_MGMT, 1,
1434                                 card->ext_csd.generic_cmd6_time);
1435                 if (err && err != -EBADMSG)
1436                         goto free_card;
1437                 if (err) {
1438                         pr_warn("%s: Enabling HPI failed\n",
1439                                 mmc_hostname(card->host));
1440                         err = 0;
1441                 } else
1442                         card->ext_csd.hpi_en = 1;
1443         }
1444
1445         /*
1446          * If cache size is higher than 0, this indicates
1447          * the existence of cache and it can be turned on.
1448          */
1449         if (card->ext_csd.cache_size > 0) {
1450                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1451                                 EXT_CSD_CACHE_CTRL, 1,
1452                                 card->ext_csd.generic_cmd6_time);
1453                 if (err && err != -EBADMSG)
1454                         goto free_card;
1455
1456                 /*
1457                  * Only if no error, cache is turned on successfully.
1458                  */
1459                 if (err) {
1460                         pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1461                                 mmc_hostname(card->host), err);
1462                         card->ext_csd.cache_ctrl = 0;
1463                         err = 0;
1464                 } else {
1465                         card->ext_csd.cache_ctrl = 1;
1466                 }
1467         }
1468
1469         /*
1470          * The mandatory minimum values are defined for packed command.
1471          * read: 5, write: 3
1472          */
1473         if (card->ext_csd.max_packed_writes >= 3 &&
1474             card->ext_csd.max_packed_reads >= 5 &&
1475             host->caps2 & MMC_CAP2_PACKED_CMD) {
1476                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1477                                 EXT_CSD_EXP_EVENTS_CTRL,
1478                                 EXT_CSD_PACKED_EVENT_EN,
1479                                 card->ext_csd.generic_cmd6_time);
1480                 if (err && err != -EBADMSG)
1481                         goto free_card;
1482                 if (err) {
1483                         pr_warn("%s: Enabling packed event failed\n",
1484                                 mmc_hostname(card->host));
1485                         card->ext_csd.packed_event_en = 0;
1486                         err = 0;
1487                 } else {
1488                         card->ext_csd.packed_event_en = 1;
1489                 }
1490         }
1491
1492         if (!oldcard)
1493                 host->card = card;
1494
1495         return 0;
1496
1497 free_card:
1498         if (!oldcard)
1499                 mmc_remove_card(card);
1500 err:
1501         return err;
1502 }
1503
1504 static int mmc_can_sleep(struct mmc_card *card)
1505 {
1506         return (card && card->ext_csd.rev >= 3);
1507 }
1508
1509 static int mmc_sleep(struct mmc_host *host)
1510 {
1511         struct mmc_command cmd = {0};
1512         struct mmc_card *card = host->card;
1513         unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1514         int err;
1515
1516         err = mmc_deselect_cards(host);
1517         if (err)
1518                 return err;
1519
1520         cmd.opcode = MMC_SLEEP_AWAKE;
1521         cmd.arg = card->rca << 16;
1522         cmd.arg |= 1 << 15;
1523
1524         /*
1525          * If the max_busy_timeout of the host is specified, validate it against
1526          * the sleep cmd timeout. A failure means we need to prevent the host
1527          * from doing hw busy detection, which is done by converting to a R1
1528          * response instead of a R1B.
1529          */
1530         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1531                 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1532         } else {
1533                 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1534                 cmd.busy_timeout = timeout_ms;
1535         }
1536
1537         err = mmc_wait_for_cmd(host, &cmd, 0);
1538         if (err)
1539                 return err;
1540
1541         /*
1542          * If the host does not wait while the card signals busy, then we will
1543          * will have to wait the sleep/awake timeout.  Note, we cannot use the
1544          * SEND_STATUS command to poll the status because that command (and most
1545          * others) is invalid while the card sleeps.
1546          */
1547         if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1548                 mmc_delay(timeout_ms);
1549
1550         return err;
1551 }
1552
1553 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1554 {
1555         return card &&
1556                 mmc_card_mmc(card) &&
1557                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1558 }
1559
1560 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1561 {
1562         unsigned int timeout = card->ext_csd.generic_cmd6_time;
1563         int err;
1564
1565         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1566         if (notify_type == EXT_CSD_POWER_OFF_LONG)
1567                 timeout = card->ext_csd.power_off_longtime;
1568
1569         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1570                         EXT_CSD_POWER_OFF_NOTIFICATION,
1571                         notify_type, timeout, true, false, false);
1572         if (err)
1573                 pr_err("%s: Power Off Notification timed out, %u\n",
1574                        mmc_hostname(card->host), timeout);
1575
1576         /* Disable the power off notification after the switch operation. */
1577         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1578
1579         return err;
1580 }
1581
1582 /*
1583  * Host is being removed. Free up the current card.
1584  */
1585 static void mmc_remove(struct mmc_host *host)
1586 {
1587         BUG_ON(!host);
1588         BUG_ON(!host->card);
1589
1590         mmc_remove_card(host->card);
1591         host->card = NULL;
1592 }
1593
1594 /*
1595  * Card detection - card is alive.
1596  */
1597 static int mmc_alive(struct mmc_host *host)
1598 {
1599         return mmc_send_status(host->card, NULL);
1600 }
1601
1602 /*
1603  * Card detection callback from host.
1604  */
1605 static void mmc_detect(struct mmc_host *host)
1606 {
1607         int err;
1608
1609         BUG_ON(!host);
1610         BUG_ON(!host->card);
1611
1612         mmc_get_card(host->card);
1613
1614         /*
1615          * Just check if our card has been removed.
1616          */
1617         err = _mmc_detect_card_removed(host);
1618
1619         mmc_put_card(host->card);
1620
1621         if (err) {
1622                 mmc_remove(host);
1623
1624                 mmc_claim_host(host);
1625                 mmc_detach_bus(host);
1626                 mmc_power_off(host);
1627                 mmc_release_host(host);
1628         }
1629 }
1630
1631 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1632 {
1633         int err = 0;
1634         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1635                                         EXT_CSD_POWER_OFF_LONG;
1636
1637         BUG_ON(!host);
1638         BUG_ON(!host->card);
1639
1640         mmc_claim_host(host);
1641
1642         if (mmc_card_suspended(host->card))
1643                 goto out;
1644
1645         if (mmc_card_doing_bkops(host->card)) {
1646                 err = mmc_stop_bkops(host->card);
1647                 if (err)
1648                         goto out;
1649         }
1650
1651         err = mmc_flush_cache(host->card);
1652         if (err)
1653                 goto out;
1654
1655         if (mmc_can_poweroff_notify(host->card) &&
1656                 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1657                 err = mmc_poweroff_notify(host->card, notify_type);
1658         else if (mmc_can_sleep(host->card))
1659                 err = mmc_sleep(host);
1660         else if (!mmc_host_is_spi(host))
1661                 err = mmc_deselect_cards(host);
1662
1663         if (!err) {
1664                 mmc_power_off(host);
1665                 mmc_card_set_suspended(host->card);
1666         }
1667 out:
1668         mmc_release_host(host);
1669         return err;
1670 }
1671
1672 /*
1673  * Suspend callback
1674  */
1675 static int mmc_suspend(struct mmc_host *host)
1676 {
1677         int err;
1678
1679         err = _mmc_suspend(host, true);
1680         if (!err) {
1681                 pm_runtime_disable(&host->card->dev);
1682                 pm_runtime_set_suspended(&host->card->dev);
1683         }
1684
1685         return err;
1686 }
1687
1688 /*
1689  * This function tries to determine if the same card is still present
1690  * and, if so, restore all state to it.
1691  */
1692 static int _mmc_resume(struct mmc_host *host)
1693 {
1694         int err = 0;
1695
1696         BUG_ON(!host);
1697         BUG_ON(!host->card);
1698
1699         mmc_claim_host(host);
1700
1701         if (!mmc_card_suspended(host->card))
1702                 goto out;
1703
1704         mmc_power_up(host, host->card->ocr);
1705         err = mmc_init_card(host, host->card->ocr, host->card);
1706         mmc_card_clr_suspended(host->card);
1707
1708 out:
1709         mmc_release_host(host);
1710         return err;
1711 }
1712
1713 /*
1714  * Shutdown callback
1715  */
1716 static int mmc_shutdown(struct mmc_host *host)
1717 {
1718         int err = 0;
1719
1720         /*
1721          * In a specific case for poweroff notify, we need to resume the card
1722          * before we can shutdown it properly.
1723          */
1724         if (mmc_can_poweroff_notify(host->card) &&
1725                 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1726                 err = _mmc_resume(host);
1727
1728         if (!err)
1729                 err = _mmc_suspend(host, false);
1730
1731         return err;
1732 }
1733
1734 /*
1735  * Callback for resume.
1736  */
1737 static int mmc_resume(struct mmc_host *host)
1738 {
1739         int err = 0;
1740
1741         if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1742                 err = _mmc_resume(host);
1743                 pm_runtime_set_active(&host->card->dev);
1744                 pm_runtime_mark_last_busy(&host->card->dev);
1745         }
1746         pm_runtime_enable(&host->card->dev);
1747
1748         return err;
1749 }
1750
1751 /*
1752  * Callback for runtime_suspend.
1753  */
1754 static int mmc_runtime_suspend(struct mmc_host *host)
1755 {
1756         int err;
1757
1758         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1759                 return 0;
1760
1761         err = _mmc_suspend(host, true);
1762         if (err)
1763                 pr_err("%s: error %d doing aggessive suspend\n",
1764                         mmc_hostname(host), err);
1765
1766         return err;
1767 }
1768
1769 /*
1770  * Callback for runtime_resume.
1771  */
1772 static int mmc_runtime_resume(struct mmc_host *host)
1773 {
1774         int err;
1775
1776         if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1777                 return 0;
1778
1779         err = _mmc_resume(host);
1780         if (err)
1781                 pr_err("%s: error %d doing aggessive resume\n",
1782                         mmc_hostname(host), err);
1783
1784         return 0;
1785 }
1786
1787 static int mmc_power_restore(struct mmc_host *host)
1788 {
1789         int ret;
1790
1791         mmc_claim_host(host);
1792         ret = mmc_init_card(host, host->card->ocr, host->card);
1793         mmc_release_host(host);
1794
1795         return ret;
1796 }
1797
1798 static const struct mmc_bus_ops mmc_ops = {
1799         .remove = mmc_remove,
1800         .detect = mmc_detect,
1801         .suspend = mmc_suspend,
1802         .resume = mmc_resume,
1803         .runtime_suspend = mmc_runtime_suspend,
1804         .runtime_resume = mmc_runtime_resume,
1805         .power_restore = mmc_power_restore,
1806         .alive = mmc_alive,
1807         .shutdown = mmc_shutdown,
1808 };
1809
1810 /*
1811  * Starting point for MMC card init.
1812  */
1813 int mmc_attach_mmc(struct mmc_host *host)
1814 {
1815         int err;
1816         u32 ocr, rocr;
1817
1818         BUG_ON(!host);
1819         WARN_ON(!host->claimed);
1820
1821         /* Set correct bus mode for MMC before attempting attach */
1822         if (!mmc_host_is_spi(host))
1823                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1824
1825         err = mmc_send_op_cond(host, 0, &ocr);
1826         if (err)
1827                 return err;
1828
1829         mmc_attach_bus(host, &mmc_ops);
1830         if (host->ocr_avail_mmc)
1831                 host->ocr_avail = host->ocr_avail_mmc;
1832
1833         /*
1834          * We need to get OCR a different way for SPI.
1835          */
1836         if (mmc_host_is_spi(host)) {
1837                 err = mmc_spi_read_ocr(host, 1, &ocr);
1838                 if (err)
1839                         goto err;
1840         }
1841
1842         rocr = mmc_select_voltage(host, ocr);
1843
1844         /*
1845          * Can we support the voltage of the card?
1846          */
1847         if (!rocr) {
1848                 err = -EINVAL;
1849                 goto err;
1850         }
1851
1852         /*
1853          * Detect and init the card.
1854          */
1855         err = mmc_init_card(host, rocr, NULL);
1856         if (err)
1857                 goto err;
1858
1859         mmc_release_host(host);
1860         err = mmc_add_card(host->card);
1861         mmc_claim_host(host);
1862         if (err)
1863                 goto remove_card;
1864
1865         return 0;
1866
1867 remove_card:
1868         mmc_release_host(host);
1869         mmc_remove_card(host->card);
1870         mmc_claim_host(host);
1871         host->card = NULL;
1872 err:
1873         mmc_detach_bus(host);
1874
1875         pr_err("%s: error %d whilst initialising MMC card\n",
1876                 mmc_hostname(host), err);
1877
1878         return err;
1879 }