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/of.h>
  15 #include <linux/slab.h>
  16 #include <linux/stat.h>
  17 #include <linux/pm_runtime.h>
  18
  19 #include <linux/mmc/host.h>
  20 #include <linux/mmc/card.h>
  21 #include <linux/mmc/mmc.h>
  22
  23 #include "core.h"
  24 #include "host.h"
  25 #include "bus.h"
  26 #include "mmc_ops.h"
  27 #include "sd_ops.h"
  28
  29 #define DEFAULT_CMD6_TIMEOUT_MS 500
  30
  31 static const unsigned int tran_exp[] = {
  32         10000,          100000,         1000000,        10000000,
  33         0,              0,              0,              0
  34 };
  35
  36 static const unsigned char tran_mant[] = {
  37         0,      10,     12,     13,     15,     20,     25,     30,
  38         35,     40,     45,     50,     55,     60,     70,     80,
  39 };
  40
  41 static const unsigned int tacc_exp[] = {
  42         1,      10,     100,    1000,   10000,  100000, 1000000, 10000000,
  43 };
  44
  45 static const unsigned int tacc_mant[] = {
  46         0,      10,     12,     13,     15,     20,     25,     30,
  47         35,     40,     45,     50,     55,     60,     70,     80,
  48 };
  49
  50 static const struct mmc_fixup mmc_ext_csd_fixups[] = {
  51         /*
  52          * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
  53          * is used so disable the HPI feature for such buggy cards.
  54          */
  55         MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
  56                               0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
  57
  58         END_FIXUP
  59 };
  60
  61 #define UNSTUFF_BITS(resp,start,size)                                   \
  62         ({                                                              \
  63                 const int __size = size;                                \
  64                 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
  65                 const int __off = 3 - ((start) / 32);                   \
  66                 const int __shft = (start) & 31;                        \
  67                 u32 __res;                                              \
  68                                                                         \
  69                 __res = resp[__off] >> __shft;                          \
  70                 if (__size + __shft > 32)                               \
  71                         __res |= resp[__off-1] << ((32 - __shft) % 32); \
  72                 __res & __mask;                                         \
  73         })
  74
  75 /*
  76  * Given the decoded CSD structure, decode the raw CID to our CID structure.
  77  */
  78 static int mmc_decode_cid(struct mmc_card *card)
  79 {
  80         u32 *resp = card->raw_cid;
  81
  82         /*
  83          * The selection of the format here is based upon published
  84          * specs from sandisk and from what people have reported.
  85          */
  86         switch (card->csd.mmca_vsn) {
  87         case 0: /* MMC v1.0 - v1.2 */
  88         case 1: /* MMC v1.4 */
  89                 card->cid.manfid        = UNSTUFF_BITS(resp, 104, 24);
  90                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  91                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  92                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  93                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  94                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  95                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  96                 card->cid.prod_name[6]  = UNSTUFF_BITS(resp, 48, 8);
  97                 card->cid.hwrev         = UNSTUFF_BITS(resp, 44, 4);
  98                 card->cid.fwrev         = UNSTUFF_BITS(resp, 40, 4);
  99                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 24);
 100                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 101                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 102                 break;
 103
 104         case 2: /* MMC v2.0 - v2.2 */
 105         case 3: /* MMC v3.1 - v3.3 */
 106         case 4: /* MMC v4 */
 107                 card->cid.manfid        = UNSTUFF_BITS(resp, 120, 8);
 108                 card->cid.oemid         = UNSTUFF_BITS(resp, 104, 16);
 109                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
 110                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
 111                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
 112                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
 113                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
 114                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
 115                 card->cid.prv           = UNSTUFF_BITS(resp, 48, 8);
 116                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 32);
 117                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 118                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 119                 break;
 120
 121         default:
 122                 pr_err("%s: card has unknown MMCA version %d\n",
 123                         mmc_hostname(card->host), card->csd.mmca_vsn);
 124                 return -EINVAL;
 125         }
 126
 127         return 0;
 128 }
 129
 130 static void mmc_set_erase_size(struct mmc_card *card)
 131 {
 132         if (card->ext_csd.erase_group_def & 1)
 133                 card->erase_size = card->ext_csd.hc_erase_size;
 134         else
 135                 card->erase_size = card->csd.erase_size;
 136
 137         mmc_init_erase(card);
 138 }
 139
 140 /*
 141  * Given a 128-bit response, decode to our card CSD structure.
 142  */
 143 static int mmc_decode_csd(struct mmc_card *card)
 144 {
 145         struct mmc_csd *csd = &card->csd;
 146         unsigned int e, m, a, b;
 147         u32 *resp = card->raw_csd;
 148
 149         /*
 150          * We only understand CSD structure v1.1 and v1.2.
 151          * v1.2 has extra information in bits 15, 11 and 10.
 152          * We also support eMMC v4.4 & v4.41.
 153          */
 154         csd->structure = UNSTUFF_BITS(resp, 126, 2);
 155         if (csd->structure == 0) {
 156                 pr_err("%s: unrecognised CSD structure version %d\n",
 157                         mmc_hostname(card->host), csd->structure);
 158                 return -EINVAL;
 159         }
 160
 161         csd->mmca_vsn    = UNSTUFF_BITS(resp, 122, 4);
 162         m = UNSTUFF_BITS(resp, 115, 4);
 163         e = UNSTUFF_BITS(resp, 112, 3);
 164         csd->tacc_ns     = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
 165         csd->tacc_clks   = UNSTUFF_BITS(resp, 104, 8) * 100;
 166
 167         m = UNSTUFF_BITS(resp, 99, 4);
 168         e = UNSTUFF_BITS(resp, 96, 3);
 169         csd->max_dtr      = tran_exp[e] * tran_mant[m];
 170         csd->cmdclass     = UNSTUFF_BITS(resp, 84, 12);
 171
 172         e = UNSTUFF_BITS(resp, 47, 3);
 173         m = UNSTUFF_BITS(resp, 62, 12);
 174         csd->capacity     = (1 + m) << (e + 2);
 175
 176         csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
 177         csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 178         csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 179         csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
 180         csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
 181         csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 182         csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 183         csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 184
 185         if (csd->write_blkbits >= 9) {
 186                 a = UNSTUFF_BITS(resp, 42, 5);
 187                 b = UNSTUFF_BITS(resp, 37, 5);
 188                 csd->erase_size = (a + 1) * (b + 1);
 189                 csd->erase_size <<= csd->write_blkbits - 9;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static void mmc_select_card_type(struct mmc_card *card)
 196 {
 197         struct mmc_host *host = card->host;
 198         u8 card_type = card->ext_csd.raw_card_type;
 199         u32 caps = host->caps, caps2 = host->caps2;
 200         unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
 201         unsigned int avail_type = 0;
 202
 203         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 204             card_type & EXT_CSD_CARD_TYPE_HS_26) {
 205                 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
 206                 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
 207         }
 208
 209         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 210             card_type & EXT_CSD_CARD_TYPE_HS_52) {
 211                 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
 212                 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
 213         }
 214
 215         if (caps & MMC_CAP_1_8V_DDR &&
 216             card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
 217                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 218                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
 219         }
 220
 221         if (caps & MMC_CAP_1_2V_DDR &&
 222             card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
 223                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 224                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
 225         }
 226
 227         if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
 228             card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
 229                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 230                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
 231         }
 232
 233         if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
 234             card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
 235                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 236                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
 237         }
 238
 239         if (caps2 & MMC_CAP2_HS400_1_8V &&
 240             card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
 241                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 242                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
 243         }
 244
 245         if (caps2 & MMC_CAP2_HS400_1_2V &&
 246             card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
 247                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 248                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
 249         }
 250
 251         if ((caps2 & MMC_CAP2_HS400_ES) &&
 252             card->ext_csd.strobe_support &&
 253             (avail_type & EXT_CSD_CARD_TYPE_HS400))
 254                 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
 255
 256         card->ext_csd.hs_max_dtr = hs_max_dtr;
 257         card->ext_csd.hs200_max_dtr = hs200_max_dtr;
 258         card->mmc_avail_type = avail_type;
 259 }
 260
 261 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
 262 {
 263         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 264
 265         /*
 266          * Disable these attributes by default
 267          */
 268         card->ext_csd.enhanced_area_offset = -EINVAL;
 269         card->ext_csd.enhanced_area_size = -EINVAL;
 270
 271         /*
 272          * Enhanced area feature support -- check whether the eMMC
 273          * card has the Enhanced area enabled.  If so, export enhanced
 274          * area offset and size to user by adding sysfs interface.
 275          */
 276         if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
 277             (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
 278                 if (card->ext_csd.partition_setting_completed) {
 279                         hc_erase_grp_sz =
 280                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 281                         hc_wp_grp_sz =
 282                                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 283
 284                         /*
 285                          * calculate the enhanced data area offset, in bytes
 286                          */
 287                         card->ext_csd.enhanced_area_offset =
 288                                 (((unsigned long long)ext_csd[139]) << 24) +
 289                                 (((unsigned long long)ext_csd[138]) << 16) +
 290                                 (((unsigned long long)ext_csd[137]) << 8) +
 291                                 (((unsigned long long)ext_csd[136]));
 292                         if (mmc_card_blockaddr(card))
 293                                 card->ext_csd.enhanced_area_offset <<= 9;
 294                         /*
 295                          * calculate the enhanced data area size, in kilobytes
 296                          */
 297                         card->ext_csd.enhanced_area_size =
 298                                 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
 299                                 ext_csd[140];
 300                         card->ext_csd.enhanced_area_size *=
 301                                 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
 302                         card->ext_csd.enhanced_area_size <<= 9;
 303                 } else {
 304                         pr_warn("%s: defines enhanced area without partition setting complete\n",
 305                                 mmc_hostname(card->host));
 306                 }
 307         }
 308 }
 309
 310 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
 311 {
 312         int idx;
 313         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 314         unsigned int part_size;
 315
 316         /*
 317          * General purpose partition feature support --
 318          * If ext_csd has the size of general purpose partitions,
 319          * set size, part_cfg, partition name in mmc_part.
 320          */
 321         if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
 322             EXT_CSD_PART_SUPPORT_PART_EN) {
 323                 hc_erase_grp_sz =
 324                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 325                 hc_wp_grp_sz =
 326                         ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 327
 328                 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
 329                         if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
 330                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
 331                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
 332                                 continue;
 333                         if (card->ext_csd.partition_setting_completed == 0) {
 334                                 pr_warn("%s: has partition size defined without partition complete\n",
 335                                         mmc_hostname(card->host));
 336                                 break;
 337                         }
 338                         part_size =
 339                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
 340                                 << 16) +
 341                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
 342                                 << 8) +
 343                                 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
 344                         part_size *= (size_t)(hc_erase_grp_sz *
 345                                 hc_wp_grp_sz);
 346                         mmc_part_add(card, part_size << 19,
 347                                 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
 348                                 "gp%d", idx, false,
 349                                 MMC_BLK_DATA_AREA_GP);
 350                 }
 351         }
 352 }
 353
 354 /* Minimum partition switch timeout in milliseconds */
 355 #define MMC_MIN_PART_SWITCH_TIME        300
 356
 357 /*
 358  * Decode extended CSD.
 359  */
 360 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 361 {
 362         int err = 0, idx;
 363         unsigned int part_size;
 364         struct device_node *np;
 365         bool broken_hpi = false;
 366
 367         /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 368         card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
 369         if (card->csd.structure == 3) {
 370                 if (card->ext_csd.raw_ext_csd_structure > 2) {
 371                         pr_err("%s: unrecognised EXT_CSD structure "
 372                                 "version %d\n", mmc_hostname(card->host),
 373                                         card->ext_csd.raw_ext_csd_structure);
 374                         err = -EINVAL;
 375                         goto out;
 376                 }
 377         }
 378
 379         np = mmc_of_find_child_device(card->host, 0);
 380         if (np && of_device_is_compatible(np, "mmc-card"))
 381                 broken_hpi = of_property_read_bool(np, "broken-hpi");
 382         of_node_put(np);
 383
 384         /*
 385          * The EXT_CSD format is meant to be forward compatible. As long
 386          * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
 387          * are authorized, see JEDEC JESD84-B50 section B.8.
 388          */
 389         card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 390
 391         /* fixup device after ext_csd revision field is updated */
 392         mmc_fixup_device(card, mmc_ext_csd_fixups);
 393
 394         card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 395         card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
 396         card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
 397         card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
 398         if (card->ext_csd.rev >= 2) {
 399                 card->ext_csd.sectors =
 400                         ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
 401                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
 402                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
 403                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 404
 405                 /* Cards with density > 2GiB are sector addressed */
 406                 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
 407                         mmc_card_set_blockaddr(card);
 408         }
 409
 410         card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
 411         card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 412         mmc_select_card_type(card);
 413
 414         card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
 415         card->ext_csd.raw_erase_timeout_mult =
 416                 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 417         card->ext_csd.raw_hc_erase_grp_size =
 418                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 419         if (card->ext_csd.rev >= 3) {
 420                 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
 421                 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
 422
 423                 /* EXT_CSD value is in units of 10ms, but we store in ms */
 424                 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 425                 /* Some eMMC set the value too low so set a minimum */
 426                 if (card->ext_csd.part_time &&
 427                     card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
 428                         card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
 429
 430                 /* Sleep / awake timeout in 100ns units */
 431                 if (sa_shift > 0 && sa_shift <= 0x17)
 432                         card->ext_csd.sa_timeout =
 433                                         1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
 434                 card->ext_csd.erase_group_def =
 435                         ext_csd[EXT_CSD_ERASE_GROUP_DEF];
 436                 card->ext_csd.hc_erase_timeout = 300 *
 437                         ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 438                 card->ext_csd.hc_erase_size =
 439                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
 440
 441                 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
 442
 443                 /*
 444                  * There are two boot regions of equal size, defined in
 445                  * multiples of 128K.
 446                  */
 447                 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
 448                         for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
 449                                 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 450                                 mmc_part_add(card, part_size,
 451                                         EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
 452                                         "boot%d", idx, true,
 453                                         MMC_BLK_DATA_AREA_BOOT);
 454                         }
 455                 }
 456         }
 457
 458         card->ext_csd.raw_hc_erase_gap_size =
 459                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 460         card->ext_csd.raw_sec_trim_mult =
 461                 ext_csd[EXT_CSD_SEC_TRIM_MULT];
 462         card->ext_csd.raw_sec_erase_mult =
 463                 ext_csd[EXT_CSD_SEC_ERASE_MULT];
 464         card->ext_csd.raw_sec_feature_support =
 465                 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 466         card->ext_csd.raw_trim_mult =
 467                 ext_csd[EXT_CSD_TRIM_MULT];
 468         card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 469         card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
 470         if (card->ext_csd.rev >= 4) {
 471                 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
 472                     EXT_CSD_PART_SETTING_COMPLETED)
 473                         card->ext_csd.partition_setting_completed = 1;
 474                 else
 475                         card->ext_csd.partition_setting_completed = 0;
 476
 477                 mmc_manage_enhanced_area(card, ext_csd);
 478
 479                 mmc_manage_gp_partitions(card, ext_csd);
 480
 481                 card->ext_csd.sec_trim_mult =
 482                         ext_csd[EXT_CSD_SEC_TRIM_MULT];
 483                 card->ext_csd.sec_erase_mult =
 484                         ext_csd[EXT_CSD_SEC_ERASE_MULT];
 485                 card->ext_csd.sec_feature_support =
 486                         ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 487                 card->ext_csd.trim_timeout = 300 *
 488                         ext_csd[EXT_CSD_TRIM_MULT];
 489
 490                 /*
 491                  * Note that the call to mmc_part_add above defaults to read
 492                  * only. If this default assumption is changed, the call must
 493                  * take into account the value of boot_locked below.
 494                  */
 495                 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
 496                 card->ext_csd.boot_ro_lockable = true;
 497
 498                 /* Save power class values */
 499                 card->ext_csd.raw_pwr_cl_52_195 =
 500                         ext_csd[EXT_CSD_PWR_CL_52_195];
 501                 card->ext_csd.raw_pwr_cl_26_195 =
 502                         ext_csd[EXT_CSD_PWR_CL_26_195];
 503                 card->ext_csd.raw_pwr_cl_52_360 =
 504                         ext_csd[EXT_CSD_PWR_CL_52_360];
 505                 card->ext_csd.raw_pwr_cl_26_360 =
 506                         ext_csd[EXT_CSD_PWR_CL_26_360];
 507                 card->ext_csd.raw_pwr_cl_200_195 =
 508                         ext_csd[EXT_CSD_PWR_CL_200_195];
 509                 card->ext_csd.raw_pwr_cl_200_360 =
 510                         ext_csd[EXT_CSD_PWR_CL_200_360];
 511                 card->ext_csd.raw_pwr_cl_ddr_52_195 =
 512                         ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
 513                 card->ext_csd.raw_pwr_cl_ddr_52_360 =
 514                         ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
 515                 card->ext_csd.raw_pwr_cl_ddr_200_360 =
 516                         ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
 517         }
 518
 519         if (card->ext_csd.rev >= 5) {
 520                 /* Adjust production date as per JEDEC JESD84-B451 */
 521                 if (card->cid.year < 2010)
 522                         card->cid.year += 16;
 523
 524                 /* check whether the eMMC card supports BKOPS */
 525                 if (!mmc_card_broken_hpi(card) &&
 526                     ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 527                         card->ext_csd.bkops = 1;
 528                         card->ext_csd.man_bkops_en =
 529                                         (ext_csd[EXT_CSD_BKOPS_EN] &
 530                                                 EXT_CSD_MANUAL_BKOPS_MASK);
 531                         card->ext_csd.raw_bkops_status =
 532                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 533                         if (!card->ext_csd.man_bkops_en)
 534                                 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
 535                                         mmc_hostname(card->host));
 536                 }
 537
 538                 /* check whether the eMMC card supports HPI */
 539                 if (!mmc_card_broken_hpi(card) &&
 540                     !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
 541                         card->ext_csd.hpi = 1;
 542                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 543                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 544                         else
 545                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 546                         /*
 547                          * Indicate the maximum timeout to close
 548                          * a command interrupted by HPI
 549                          */
 550                         card->ext_csd.out_of_int_time =
 551                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 552                 }
 553
 554                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 555                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 556
 557                 /*
 558                  * RPMB regions are defined in multiples of 128K.
 559                  */
 560                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 561                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 562                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 563                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 564                                 "rpmb", 0, false,
 565                                 MMC_BLK_DATA_AREA_RPMB);
 566                 }
 567         }
 568
 569         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 570         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 571                 card->erased_byte = 0xFF;
 572         else
 573                 card->erased_byte = 0x0;
 574
 575         /* eMMC v4.5 or later */
 576         card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
 577         if (card->ext_csd.rev >= 6) {
 578                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 579
 580                 card->ext_csd.generic_cmd6_time = 10 *
 581                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 582                 card->ext_csd.power_off_longtime = 10 *
 583                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 584
 585                 card->ext_csd.cache_size =
 586                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 587                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 588                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 589                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 590
 591                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 592                         card->ext_csd.data_sector_size = 4096;
 593                 else
 594                         card->ext_csd.data_sector_size = 512;
 595
 596                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 597                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 598                         card->ext_csd.data_tag_unit_size =
 599                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 600                         (card->ext_csd.data_sector_size);
 601                 } else {
 602                         card->ext_csd.data_tag_unit_size = 0;
 603                 }
 604
 605                 card->ext_csd.max_packed_writes =
 606                         ext_csd[EXT_CSD_MAX_PACKED_WRITES];
 607                 card->ext_csd.max_packed_reads =
 608                         ext_csd[EXT_CSD_MAX_PACKED_READS];
 609         } else {
 610                 card->ext_csd.data_sector_size = 512;
 611         }
 612
 613         /* eMMC v5 or later */
 614         if (card->ext_csd.rev >= 7) {
 615                 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
 616                        MMC_FIRMWARE_LEN);
 617                 card->ext_csd.ffu_capable =
 618                         (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
 619                         !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
 620         }
 621 out:
 622         return err;
 623 }
 624
 625 static int mmc_read_ext_csd(struct mmc_card *card)
 626 {
 627         u8 *ext_csd;
 628         int err;
 629
 630         if (!mmc_can_ext_csd(card))
 631                 return 0;
 632
 633         err = mmc_get_ext_csd(card, &ext_csd);
 634         if (err) {
 635                 /* If the host or the card can't do the switch,
 636                  * fail more gracefully. */
 637                 if ((err != -EINVAL)
 638                  && (err != -ENOSYS)
 639                  && (err != -EFAULT))
 640                         return err;
 641
 642                 /*
 643                  * High capacity cards should have this "magic" size
 644                  * stored in their CSD.
 645                  */
 646                 if (card->csd.capacity == (4096 * 512)) {
 647                         pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
 648                                 mmc_hostname(card->host));
 649                 } else {
 650                         pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
 651                                 mmc_hostname(card->host));
 652                         err = 0;
 653                 }
 654
 655                 return err;
 656         }
 657
 658         err = mmc_decode_ext_csd(card, ext_csd);
 659         kfree(ext_csd);
 660         return err;
 661 }
 662
 663 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 664 {
 665         u8 *bw_ext_csd;
 666         int err;
 667
 668         if (bus_width == MMC_BUS_WIDTH_1)
 669                 return 0;
 670
 671         err = mmc_get_ext_csd(card, &bw_ext_csd);
 672         if (err)
 673                 return err;
 674
 675         /* only compare read only fields */
 676         err = !((card->ext_csd.raw_partition_support ==
 677                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 678                 (card->ext_csd.raw_erased_mem_count ==
 679                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 680                 (card->ext_csd.rev ==
 681                         bw_ext_csd[EXT_CSD_REV]) &&
 682                 (card->ext_csd.raw_ext_csd_structure ==
 683                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 684                 (card->ext_csd.raw_card_type ==
 685                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 686                 (card->ext_csd.raw_s_a_timeout ==
 687                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 688                 (card->ext_csd.raw_hc_erase_gap_size ==
 689                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 690                 (card->ext_csd.raw_erase_timeout_mult ==
 691                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 692                 (card->ext_csd.raw_hc_erase_grp_size ==
 693                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 694                 (card->ext_csd.raw_sec_trim_mult ==
 695                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 696                 (card->ext_csd.raw_sec_erase_mult ==
 697                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 698                 (card->ext_csd.raw_sec_feature_support ==
 699                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 700                 (card->ext_csd.raw_trim_mult ==
 701                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 702                 (card->ext_csd.raw_sectors[0] ==
 703                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 704                 (card->ext_csd.raw_sectors[1] ==
 705                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 706                 (card->ext_csd.raw_sectors[2] ==
 707                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 708                 (card->ext_csd.raw_sectors[3] ==
 709                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
 710                 (card->ext_csd.raw_pwr_cl_52_195 ==
 711                         bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
 712                 (card->ext_csd.raw_pwr_cl_26_195 ==
 713                         bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
 714                 (card->ext_csd.raw_pwr_cl_52_360 ==
 715                         bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
 716                 (card->ext_csd.raw_pwr_cl_26_360 ==
 717                         bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
 718                 (card->ext_csd.raw_pwr_cl_200_195 ==
 719                         bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
 720                 (card->ext_csd.raw_pwr_cl_200_360 ==
 721                         bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
 722                 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
 723                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
 724                 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
 725                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
 726                 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
 727                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
 728
 729         if (err)
 730                 err = -EINVAL;
 731
 732         kfree(bw_ext_csd);
 733         return err;
 734 }
 735
 736 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 737         card->raw_cid[2], card->raw_cid[3]);
 738 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 739         card->raw_csd[2], card->raw_csd[3]);
 740 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 741 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 742 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 743 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
 744 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 745 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 746 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 747 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 748 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
 749 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 750 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 751                 card->ext_csd.enhanced_area_offset);
 752 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 753 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 754 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 755 MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
 756
 757 static ssize_t mmc_fwrev_show(struct device *dev,
 758                               struct device_attribute *attr,
 759                               char *buf)
 760 {
 761         struct mmc_card *card = mmc_dev_to_card(dev);
 762
 763         if (card->ext_csd.rev < 7) {
 764                 return sprintf(buf, "0x%x\n", card->cid.fwrev);
 765         } else {
 766                 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
 767                                card->ext_csd.fwrev);
 768         }
 769 }
 770
 771 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
 772
 773 static ssize_t mmc_dsr_show(struct device *dev,
 774                             struct device_attribute *attr,
 775                             char *buf)
 776 {
 777         struct mmc_card *card = mmc_dev_to_card(dev);
 778         struct mmc_host *host = card->host;
 779
 780         if (card->csd.dsr_imp && host->dsr_req)
 781                 return sprintf(buf, "0x%x\n", host->dsr);
 782         else
 783                 /* return default DSR value */
 784                 return sprintf(buf, "0x%x\n", 0x404);
 785 }
 786
 787 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
 788
 789 static struct attribute *mmc_std_attrs[] = {
 790         &dev_attr_cid.attr,
 791         &dev_attr_csd.attr,
 792         &dev_attr_date.attr,
 793         &dev_attr_erase_size.attr,
 794         &dev_attr_preferred_erase_size.attr,
 795         &dev_attr_fwrev.attr,
 796         &dev_attr_ffu_capable.attr,
 797         &dev_attr_hwrev.attr,
 798         &dev_attr_manfid.attr,
 799         &dev_attr_name.attr,
 800         &dev_attr_oemid.attr,
 801         &dev_attr_prv.attr,
 802         &dev_attr_serial.attr,
 803         &dev_attr_enhanced_area_offset.attr,
 804         &dev_attr_enhanced_area_size.attr,
 805         &dev_attr_raw_rpmb_size_mult.attr,
 806         &dev_attr_rel_sectors.attr,
 807         &dev_attr_ocr.attr,
 808         &dev_attr_dsr.attr,
 809         NULL,
 810 };
 811 ATTRIBUTE_GROUPS(mmc_std);
 812
 813 static struct device_type mmc_type = {
 814         .groups = mmc_std_groups,
 815 };
 816
 817 /*
 818  * Select the PowerClass for the current bus width
 819  * If power class is defined for 4/8 bit bus in the
 820  * extended CSD register, select it by executing the
 821  * mmc_switch command.
 822  */
 823 static int __mmc_select_powerclass(struct mmc_card *card,
 824                                    unsigned int bus_width)
 825 {
 826         struct mmc_host *host = card->host;
 827         struct mmc_ext_csd *ext_csd = &card->ext_csd;
 828         unsigned int pwrclass_val = 0;
 829         int err = 0;
 830
 831         switch (1 << host->ios.vdd) {
 832         case MMC_VDD_165_195:
 833                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 834                         pwrclass_val = ext_csd->raw_pwr_cl_26_195;
 835                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 836                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 837                                 ext_csd->raw_pwr_cl_52_195 :
 838                                 ext_csd->raw_pwr_cl_ddr_52_195;
 839                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 840                         pwrclass_val = ext_csd->raw_pwr_cl_200_195;
 841                 break;
 842         case MMC_VDD_27_28:
 843         case MMC_VDD_28_29:
 844         case MMC_VDD_29_30:
 845         case MMC_VDD_30_31:
 846         case MMC_VDD_31_32:
 847         case MMC_VDD_32_33:
 848         case MMC_VDD_33_34:
 849         case MMC_VDD_34_35:
 850         case MMC_VDD_35_36:
 851                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 852                         pwrclass_val = ext_csd->raw_pwr_cl_26_360;
 853                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 854                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 855                                 ext_csd->raw_pwr_cl_52_360 :
 856                                 ext_csd->raw_pwr_cl_ddr_52_360;
 857                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 858                         pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
 859                                 ext_csd->raw_pwr_cl_ddr_200_360 :
 860                                 ext_csd->raw_pwr_cl_200_360;
 861                 break;
 862         default:
 863                 pr_warn("%s: Voltage range not supported for power class\n",
 864                         mmc_hostname(host));
 865                 return -EINVAL;
 866         }
 867
 868         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 869                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 870                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 871         else
 872                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 873                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 874
 875         /* If the power class is different from the default value */
 876         if (pwrclass_val > 0) {
 877                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 878                                  EXT_CSD_POWER_CLASS,
 879                                  pwrclass_val,
 880                                  card->ext_csd.generic_cmd6_time);
 881         }
 882
 883         return err;
 884 }
 885
 886 static int mmc_select_powerclass(struct mmc_card *card)
 887 {
 888         struct mmc_host *host = card->host;
 889         u32 bus_width, ext_csd_bits;
 890         int err, ddr;
 891
 892         /* Power class selection is supported for versions >= 4.0 */
 893         if (!mmc_can_ext_csd(card))
 894                 return 0;
 895
 896         bus_width = host->ios.bus_width;
 897         /* Power class values are defined only for 4/8 bit bus */
 898         if (bus_width == MMC_BUS_WIDTH_1)
 899                 return 0;
 900
 901         ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
 902         if (ddr)
 903                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 904                         EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 905         else
 906                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 907                         EXT_CSD_BUS_WIDTH_8 :  EXT_CSD_BUS_WIDTH_4;
 908
 909         err = __mmc_select_powerclass(card, ext_csd_bits);
 910         if (err)
 911                 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
 912                         mmc_hostname(host), 1 << bus_width, ddr);
 913
 914         return err;
 915 }
 916
 917 /*
 918  * Set the bus speed for the selected speed mode.
 919  */
 920 static void mmc_set_bus_speed(struct mmc_card *card)
 921 {
 922         unsigned int max_dtr = (unsigned int)-1;
 923
 924         if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
 925              max_dtr > card->ext_csd.hs200_max_dtr)
 926                 max_dtr = card->ext_csd.hs200_max_dtr;
 927         else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
 928                 max_dtr = card->ext_csd.hs_max_dtr;
 929         else if (max_dtr > card->csd.max_dtr)
 930                 max_dtr = card->csd.max_dtr;
 931
 932         mmc_set_clock(card->host, max_dtr);
 933 }
 934
 935 /*
 936  * Select the bus width amoung 4-bit and 8-bit(SDR).
 937  * If the bus width is changed successfully, return the selected width value.
 938  * Zero is returned instead of error value if the wide width is not supported.
 939  */
 940 static int mmc_select_bus_width(struct mmc_card *card)
 941 {
 942         static unsigned ext_csd_bits[] = {
 943                 EXT_CSD_BUS_WIDTH_8,
 944                 EXT_CSD_BUS_WIDTH_4,
 945         };
 946         static unsigned bus_widths[] = {
 947                 MMC_BUS_WIDTH_8,
 948                 MMC_BUS_WIDTH_4,
 949         };
 950         struct mmc_host *host = card->host;
 951         unsigned idx, bus_width = 0;
 952         int err = 0;
 953
 954         if (!mmc_can_ext_csd(card) ||
 955             !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
 956                 return 0;
 957
 958         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
 959
 960         /*
 961          * Unlike SD, MMC cards dont have a configuration register to notify
 962          * supported bus width. So bus test command should be run to identify
 963          * the supported bus width or compare the ext csd values of current
 964          * bus width and ext csd values of 1 bit mode read earlier.
 965          */
 966         for (; idx < ARRAY_SIZE(bus_widths); idx++) {
 967                 /*
 968                  * Host is capable of 8bit transfer, then switch
 969                  * the device to work in 8bit transfer mode. If the
 970                  * mmc switch command returns error then switch to
 971                  * 4bit transfer mode. On success set the corresponding
 972                  * bus width on the host.
 973                  */
 974                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 975                                  EXT_CSD_BUS_WIDTH,
 976                                  ext_csd_bits[idx],
 977                                  card->ext_csd.generic_cmd6_time);
 978                 if (err)
 979                         continue;
 980
 981                 bus_width = bus_widths[idx];
 982                 mmc_set_bus_width(host, bus_width);
 983
 984                 /*
 985                  * If controller can't handle bus width test,
 986                  * compare ext_csd previously read in 1 bit mode
 987                  * against ext_csd at new bus width
 988                  */
 989                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
 990                         err = mmc_compare_ext_csds(card, bus_width);
 991                 else
 992                         err = mmc_bus_test(card, bus_width);
 993
 994                 if (!err) {
 995                         err = bus_width;
 996                         break;
 997                 } else {
 998                         pr_warn("%s: switch to bus width %d failed\n",
 999                                 mmc_hostname(host), 1 << bus_width);
1000                 }
1001         }
1002
1003         return err;
1004 }
1005
1006 /* Caller must hold re-tuning */
1007 static int mmc_switch_status(struct mmc_card *card)
1008 {
1009         u32 status;
1010         int err;
1011
1012         err = mmc_send_status(card, &status);
1013         if (err)
1014                 return err;
1015
1016         return mmc_switch_status_error(card->host, status);
1017 }
1018
1019 /*
1020  * Switch to the high-speed mode
1021  */
1022 static int mmc_select_hs(struct mmc_card *card)
1023 {
1024         int err;
1025
1026         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1027                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1028                            card->ext_csd.generic_cmd6_time,
1029                            true, false, true);
1030         if (!err) {
1031                 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1032                 err = mmc_switch_status(card);
1033         }
1034
1035         if (err)
1036                 pr_warn("%s: switch to high-speed failed, err:%d\n",
1037                         mmc_hostname(card->host), err);
1038
1039         return err;
1040 }
1041
1042 /*
1043  * Activate wide bus and DDR if supported.
1044  */
1045 static int mmc_select_hs_ddr(struct mmc_card *card)
1046 {
1047         struct mmc_host *host = card->host;
1048         u32 bus_width, ext_csd_bits;
1049         int err = 0;
1050
1051         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1052                 return 0;
1053
1054         bus_width = host->ios.bus_width;
1055         if (bus_width == MMC_BUS_WIDTH_1)
1056                 return 0;
1057
1058         ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1059                 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1060
1061         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1062                         EXT_CSD_BUS_WIDTH,
1063                         ext_csd_bits,
1064                         card->ext_csd.generic_cmd6_time);
1065         if (err) {
1066                 pr_err("%s: switch to bus width %d ddr failed\n",
1067                         mmc_hostname(host), 1 << bus_width);
1068                 return err;
1069         }
1070
1071         /*
1072          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1073          * signaling.
1074          *
1075          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1076          *
1077          * 1.8V vccq at 3.3V core voltage (vcc) is not required
1078          * in the JEDEC spec for DDR.
1079          *
1080          * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1081          * host controller can support this, like some of the SDHCI
1082          * controller which connect to an eMMC device. Some of these
1083          * host controller still needs to use 1.8v vccq for supporting
1084          * DDR mode.
1085          *
1086          * So the sequence will be:
1087          * if (host and device can both support 1.2v IO)
1088          *      use 1.2v IO;
1089          * else if (host and device can both support 1.8v IO)
1090          *      use 1.8v IO;
1091          * so if host and device can only support 3.3v IO, this is the
1092          * last choice.
1093          *
1094          * WARNING: eMMC rules are NOT the same as SD DDR
1095          */
1096         err = -EINVAL;
1097         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1098                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1099
1100         if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1101                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1102
1103         /* make sure vccq is 3.3v after switching disaster */
1104         if (err)
1105                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1106
1107         if (!err)
1108                 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1109
1110         return err;
1111 }
1112
1113 static int mmc_select_hs400(struct mmc_card *card)
1114 {
1115         struct mmc_host *host = card->host;
1116         unsigned int max_dtr;
1117         int err = 0;
1118         u8 val;
1119
1120         /*
1121          * HS400 mode requires 8-bit bus width
1122          */
1123         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1124               host->ios.bus_width == MMC_BUS_WIDTH_8))
1125                 return 0;
1126
1127         /* Switch card to HS mode */
1128         val = EXT_CSD_TIMING_HS;
1129         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1130                            EXT_CSD_HS_TIMING, val,
1131                            card->ext_csd.generic_cmd6_time,
1132                            true, false, true);
1133         if (err) {
1134                 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1135                         mmc_hostname(host), err);
1136                 return err;
1137         }
1138
1139         /* Set host controller to HS timing */
1140         mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1141
1142         /* Reduce frequency to HS frequency */
1143         max_dtr = card->ext_csd.hs_max_dtr;
1144         mmc_set_clock(host, max_dtr);
1145
1146         err = mmc_switch_status(card);
1147         if (err)
1148                 goto out_err;
1149
1150         /* Switch card to DDR */
1151         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1152                          EXT_CSD_BUS_WIDTH,
1153                          EXT_CSD_DDR_BUS_WIDTH_8,
1154                          card->ext_csd.generic_cmd6_time);
1155         if (err) {
1156                 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1157                         mmc_hostname(host), err);
1158                 return err;
1159         }
1160
1161         /* Switch card to HS400 */
1162         val = EXT_CSD_TIMING_HS400 |
1163               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1164         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1165                            EXT_CSD_HS_TIMING, val,
1166                            card->ext_csd.generic_cmd6_time,
1167                            true, false, true);
1168         if (err) {
1169                 pr_err("%s: switch to hs400 failed, err:%d\n",
1170                          mmc_hostname(host), err);
1171                 return err;
1172         }
1173
1174         /* Set host controller to HS400 timing and frequency */
1175         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1176         mmc_set_bus_speed(card);
1177
1178         err = mmc_switch_status(card);
1179         if (err)
1180                 goto out_err;
1181
1182         return 0;
1183
1184 out_err:
1185         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1186                __func__, err);
1187         return err;
1188 }
1189
1190 int mmc_hs200_to_hs400(struct mmc_card *card)
1191 {
1192         return mmc_select_hs400(card);
1193 }
1194
1195 int mmc_hs400_to_hs200(struct mmc_card *card)
1196 {
1197         struct mmc_host *host = card->host;
1198         unsigned int max_dtr;
1199         int err;
1200         u8 val;
1201
1202         /* Reduce frequency to HS */
1203         max_dtr = card->ext_csd.hs_max_dtr;
1204         mmc_set_clock(host, max_dtr);
1205
1206         /* Switch HS400 to HS DDR */
1207         val = EXT_CSD_TIMING_HS;
1208         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1209                            val, card->ext_csd.generic_cmd6_time,
1210                            true, false, true);
1211         if (err)
1212                 goto out_err;
1213
1214         mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1215
1216         err = mmc_switch_status(card);
1217         if (err)
1218                 goto out_err;
1219
1220         /* Switch HS DDR to HS */
1221         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1222                            EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1223                            true, false, true);
1224         if (err)
1225                 goto out_err;
1226
1227         mmc_set_timing(host, MMC_TIMING_MMC_HS);
1228
1229         err = mmc_switch_status(card);
1230         if (err)
1231                 goto out_err;
1232
1233         /* Switch HS to HS200 */
1234         val = EXT_CSD_TIMING_HS200 |
1235               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1236         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1237                            val, card->ext_csd.generic_cmd6_time,
1238                            true, false, true);
1239         if (err)
1240                 goto out_err;
1241
1242         mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1243
1244         err = mmc_switch_status(card);
1245         if (err)
1246                 goto out_err;
1247
1248         mmc_set_bus_speed(card);
1249
1250         return 0;
1251
1252 out_err:
1253         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1254                __func__, err);
1255         return err;
1256 }
1257
1258 static int mmc_select_hs400es(struct mmc_card *card)
1259 {
1260         struct mmc_host *host = card->host;
1261         int err = 0;
1262         u8 val;
1263
1264         if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1265                 err = -ENOTSUPP;
1266                 goto out_err;
1267         }
1268
1269         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1270                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1271
1272         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1273                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1274
1275         /* If fails try again during next card power cycle */
1276         if (err)
1277                 goto out_err;
1278
1279         err = mmc_select_bus_width(card);
1280         if (err < 0)
1281                 goto out_err;
1282
1283         /* Switch card to HS mode */
1284         err = mmc_select_hs(card);
1285         if (err)
1286                 goto out_err;
1287
1288         mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1289
1290         err = mmc_switch_status(card);
1291         if (err)
1292                 goto out_err;
1293
1294         /* Switch card to DDR with strobe bit */
1295         val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1296         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1297                          EXT_CSD_BUS_WIDTH,
1298                          val,
1299                          card->ext_csd.generic_cmd6_time);
1300         if (err) {
1301                 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1302                         mmc_hostname(host), err);
1303                 goto out_err;
1304         }
1305
1306         /* Switch card to HS400 */
1307         val = EXT_CSD_TIMING_HS400 |
1308               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1309         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1310                            EXT_CSD_HS_TIMING, val,
1311                            card->ext_csd.generic_cmd6_time,
1312                            true, false, true);
1313         if (err) {
1314                 pr_err("%s: switch to hs400es failed, err:%d\n",
1315                         mmc_hostname(host), err);
1316                 goto out_err;
1317         }
1318
1319         /* Set host controller to HS400 timing and frequency */
1320         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1321
1322         /* Controller enable enhanced strobe function */
1323         host->ios.enhanced_strobe = true;
1324         if (host->ops->hs400_enhanced_strobe)
1325                 host->ops->hs400_enhanced_strobe(host, &host->ios);
1326
1327         err = mmc_switch_status(card);
1328         if (err)
1329                 goto out_err;
1330
1331         return 0;
1332
1333 out_err:
1334         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1335                __func__, err);
1336         return err;
1337 }
1338
1339 static void mmc_select_driver_type(struct mmc_card *card)
1340 {
1341         int card_drv_type, drive_strength, drv_type;
1342
1343         card_drv_type = card->ext_csd.raw_driver_strength |
1344                         mmc_driver_type_mask(0);
1345
1346         drive_strength = mmc_select_drive_strength(card,
1347                                                    card->ext_csd.hs200_max_dtr,
1348                                                    card_drv_type, &drv_type);
1349
1350         card->drive_strength = drive_strength;
1351
1352         if (drv_type)
1353                 mmc_set_driver_type(card->host, drv_type);
1354 }
1355
1356 /*
1357  * For device supporting HS200 mode, the following sequence
1358  * should be done before executing the tuning process.
1359  * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1360  * 2. switch to HS200 mode
1361  * 3. set the clock to > 52Mhz and <=200MHz
1362  */
1363 static int mmc_select_hs200(struct mmc_card *card)
1364 {
1365         struct mmc_host *host = card->host;
1366         unsigned int old_timing, old_signal_voltage;
1367         int err = -EINVAL;
1368         u8 val;
1369
1370         old_signal_voltage = host->ios.signal_voltage;
1371         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1372                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1373
1374         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1375                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1376
1377         /* If fails try again during next card power cycle */
1378         if (err)
1379                 return err;
1380
1381         mmc_select_driver_type(card);
1382
1383         /*
1384          * Set the bus width(4 or 8) with host's support and
1385          * switch to HS200 mode if bus width is set successfully.
1386          */
1387         err = mmc_select_bus_width(card);
1388         if (err > 0) {
1389                 val = EXT_CSD_TIMING_HS200 |
1390                       card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1391                 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1392                                    EXT_CSD_HS_TIMING, val,
1393                                    card->ext_csd.generic_cmd6_time,
1394                                    true, false, true);
1395                 if (err)
1396                         goto err;
1397                 old_timing = host->ios.timing;
1398                 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1399
1400                 err = mmc_switch_status(card);
1401                 /*
1402                  * mmc_select_timing() assumes timing has not changed if
1403                  * it is a switch error.
1404                  */
1405                 if (err == -EBADMSG)
1406                         mmc_set_timing(host, old_timing);
1407         }
1408 err:
1409         if (err) {
1410                 /* fall back to the old signal voltage, if fails report error */
1411                 if (__mmc_set_signal_voltage(host, old_signal_voltage))
1412                         err = -EIO;
1413
1414                 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1415                        __func__, err);
1416         }
1417         return err;
1418 }
1419
1420 /*
1421  * Activate High Speed, HS200 or HS400ES mode if supported.
1422  */
1423 static int mmc_select_timing(struct mmc_card *card)
1424 {
1425         int err = 0;
1426
1427         if (!mmc_can_ext_csd(card))
1428                 goto bus_speed;
1429
1430         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1431                 err = mmc_select_hs400es(card);
1432         else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1433                 err = mmc_select_hs200(card);
1434         else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1435                 err = mmc_select_hs(card);
1436
1437         if (err && err != -EBADMSG)
1438                 return err;
1439
1440 bus_speed:
1441         /*
1442          * Set the bus speed to the selected bus timing.
1443          * If timing is not selected, backward compatible is the default.
1444          */
1445         mmc_set_bus_speed(card);
1446         return 0;
1447 }
1448
1449 /*
1450  * Execute tuning sequence to seek the proper bus operating
1451  * conditions for HS200 and HS400, which sends CMD21 to the device.
1452  */
1453 static int mmc_hs200_tuning(struct mmc_card *card)
1454 {
1455         struct mmc_host *host = card->host;
1456
1457         /*
1458          * Timing should be adjusted to the HS400 target
1459          * operation frequency for tuning process
1460          */
1461         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1462             host->ios.bus_width == MMC_BUS_WIDTH_8)
1463                 if (host->ops->prepare_hs400_tuning)
1464                         host->ops->prepare_hs400_tuning(host, &host->ios);
1465
1466         return mmc_execute_tuning(card);
1467 }
1468
1469 /*
1470  * Handle the detection and initialisation of a card.
1471  *
1472  * In the case of a resume, "oldcard" will contain the card
1473  * we're trying to reinitialise.
1474  */
1475 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1476         struct mmc_card *oldcard)
1477 {
1478         struct mmc_card *card;
1479         int err;
1480         u32 cid[4];
1481         u32 rocr;
1482
1483         BUG_ON(!host);
1484         WARN_ON(!host->claimed);
1485
1486         /* Set correct bus mode for MMC before attempting init */
1487         if (!mmc_host_is_spi(host))
1488                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1489
1490         /*
1491          * Since we're changing the OCR value, we seem to
1492          * need to tell some cards to go back to the idle
1493          * state.  We wait 1ms to give cards time to
1494          * respond.
1495          * mmc_go_idle is needed for eMMC that are asleep
1496          */
1497         mmc_go_idle(host);
1498
1499         /* The extra bit indicates that we support high capacity */
1500         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1501         if (err)
1502                 goto err;
1503
1504         /*
1505          * For SPI, enable CRC as appropriate.
1506          */
1507         if (mmc_host_is_spi(host)) {
1508                 err = mmc_spi_set_crc(host, use_spi_crc);
1509                 if (err)
1510                         goto err;
1511         }
1512
1513         /*
1514          * Fetch CID from card.
1515          */
1516         if (mmc_host_is_spi(host))
1517                 err = mmc_send_cid(host, cid);
1518         else
1519                 err = mmc_all_send_cid(host, cid);
1520         if (err)
1521                 goto err;
1522
1523         if (oldcard) {
1524                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1525                         err = -ENOENT;
1526                         goto err;
1527                 }
1528
1529                 card = oldcard;
1530         } else {
1531                 /*
1532                  * Allocate card structure.
1533                  */
1534                 card = mmc_alloc_card(host, &mmc_type);
1535                 if (IS_ERR(card)) {
1536                         err = PTR_ERR(card);
1537                         goto err;
1538                 }
1539
1540                 card->ocr = ocr;
1541                 card->type = MMC_TYPE_MMC;
1542                 card->rca = 1;
1543                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1544         }
1545
1546         /*
1547          * Call the optional HC's init_card function to handle quirks.
1548          */
1549         if (host->ops->init_card)
1550                 host->ops->init_card(host, card);
1551
1552         /*
1553          * For native busses:  set card RCA and quit open drain mode.
1554          */
1555         if (!mmc_host_is_spi(host)) {
1556                 err = mmc_set_relative_addr(card);
1557                 if (err)
1558                         goto free_card;
1559
1560                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1561         }
1562
1563         if (!oldcard) {
1564                 /*
1565                  * Fetch CSD from card.
1566                  */
1567                 err = mmc_send_csd(card, card->raw_csd);
1568                 if (err)
1569                         goto free_card;
1570
1571                 err = mmc_decode_csd(card);
1572                 if (err)
1573                         goto free_card;
1574                 err = mmc_decode_cid(card);
1575                 if (err)
1576                         goto free_card;
1577         }
1578
1579         /*
1580          * handling only for cards supporting DSR and hosts requesting
1581          * DSR configuration
1582          */
1583         if (card->csd.dsr_imp && host->dsr_req)
1584                 mmc_set_dsr(host);
1585
1586         /*
1587          * Select card, as all following commands rely on that.
1588          */
1589         if (!mmc_host_is_spi(host)) {
1590                 err = mmc_select_card(card);
1591                 if (err)
1592                         goto free_card;
1593         }
1594
1595         if (!oldcard) {
1596                 /* Read extended CSD. */
1597                 err = mmc_read_ext_csd(card);
1598                 if (err)
1599                         goto free_card;
1600
1601                 /*
1602                  * If doing byte addressing, check if required to do sector
1603                  * addressing.  Handle the case of <2GB cards needing sector
1604                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
1605                  * ocr register has bit 30 set for sector addressing.
1606                  */
1607                 if (rocr & BIT(30))
1608                         mmc_card_set_blockaddr(card);
1609
1610                 /* Erase size depends on CSD and Extended CSD */
1611                 mmc_set_erase_size(card);
1612         }
1613
1614         /*
1615          * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1616          * bit.  This bit will be lost every time after a reset or power off.
1617          */
1618         if (card->ext_csd.partition_setting_completed ||
1619             (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1620                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1621                                  EXT_CSD_ERASE_GROUP_DEF, 1,
1622                                  card->ext_csd.generic_cmd6_time);
1623
1624                 if (err && err != -EBADMSG)
1625                         goto free_card;
1626
1627                 if (err) {
1628                         err = 0;
1629                         /*
1630                          * Just disable enhanced area off & sz
1631                          * will try to enable ERASE_GROUP_DEF
1632                          * during next time reinit
1633                          */
1634                         card->ext_csd.enhanced_area_offset = -EINVAL;
1635                         card->ext_csd.enhanced_area_size = -EINVAL;
1636                 } else {
1637                         card->ext_csd.erase_group_def = 1;
1638                         /*
1639                          * enable ERASE_GRP_DEF successfully.
1640                          * This will affect the erase size, so
1641                          * here need to reset erase size
1642                          */
1643                         mmc_set_erase_size(card);
1644                 }
1645         }
1646
1647         /*
1648          * Ensure eMMC user default partition is enabled
1649          */
1650         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1651                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1652                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1653                                  card->ext_csd.part_config,
1654                                  card->ext_csd.part_time);
1655                 if (err && err != -EBADMSG)
1656                         goto free_card;
1657         }
1658
1659         /*
1660          * Enable power_off_notification byte in the ext_csd register
1661          */
1662         if (card->ext_csd.rev >= 6) {
1663                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1664                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1665                                  EXT_CSD_POWER_ON,
1666                                  card->ext_csd.generic_cmd6_time);
1667                 if (err && err != -EBADMSG)
1668                         goto free_card;
1669
1670                 /*
1671                  * The err can be -EBADMSG or 0,
1672                  * so check for success and update the flag
1673                  */
1674                 if (!err)
1675                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1676         }
1677
1678         /*
1679          * Select timing interface
1680          */
1681         err = mmc_select_timing(card);
1682         if (err)
1683                 goto free_card;
1684
1685         if (mmc_card_hs200(card)) {
1686                 err = mmc_hs200_tuning(card);
1687                 if (err)
1688                         goto free_card;
1689
1690                 err = mmc_select_hs400(card);
1691                 if (err)
1692                         goto free_card;
1693         } else if (mmc_card_hs(card)) {
1694                 /* Select the desired bus width optionally */
1695                 err = mmc_select_bus_width(card);
1696                 if (err > 0) {
1697                         err = mmc_select_hs_ddr(card);
1698                         if (err)
1699                                 goto free_card;
1700                 }
1701         }
1702
1703         /*
1704          * Choose the power class with selected bus interface
1705          */
1706         mmc_select_powerclass(card);
1707
1708         /*
1709          * Enable HPI feature (if supported)
1710          */
1711         if (card->ext_csd.hpi) {
1712                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1713                                 EXT_CSD_HPI_MGMT, 1,
1714                                 card->ext_csd.generic_cmd6_time);
1715                 if (err && err != -EBADMSG)
1716                         goto free_card;
1717                 if (err) {
1718                         pr_warn("%s: Enabling HPI failed\n",
1719                                 mmc_hostname(card->host));
1720                         err = 0;
1721                 } else
1722                         card->ext_csd.hpi_en = 1;
1723         }
1724
1725         /*
1726          * If cache size is higher than 0, this indicates
1727          * the existence of cache and it can be turned on.
1728          */
1729         if (!mmc_card_broken_hpi(card) &&
1730             card->ext_csd.cache_size > 0) {
1731                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1732                                 EXT_CSD_CACHE_CTRL, 1,
1733                                 card->ext_csd.generic_cmd6_time);
1734                 if (err && err != -EBADMSG)
1735                         goto free_card;
1736
1737                 /*
1738                  * Only if no error, cache is turned on successfully.
1739                  */
1740                 if (err) {
1741                         pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1742                                 mmc_hostname(card->host), err);
1743                         card->ext_csd.cache_ctrl = 0;
1744                         err = 0;
1745                 } else {
1746                         card->ext_csd.cache_ctrl = 1;
1747                 }
1748         }
1749
1750         /*
1751          * The mandatory minimum values are defined for packed command.
1752          * read: 5, write: 3
1753          */
1754         if (card->ext_csd.max_packed_writes >= 3 &&
1755             card->ext_csd.max_packed_reads >= 5 &&
1756             host->caps2 & MMC_CAP2_PACKED_CMD) {
1757                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1758                                 EXT_CSD_EXP_EVENTS_CTRL,
1759                                 EXT_CSD_PACKED_EVENT_EN,
1760                                 card->ext_csd.generic_cmd6_time);
1761                 if (err && err != -EBADMSG)
1762                         goto free_card;
1763                 if (err) {
1764                         pr_warn("%s: Enabling packed event failed\n",
1765                                 mmc_hostname(card->host));
1766                         card->ext_csd.packed_event_en = 0;
1767                         err = 0;
1768                 } else {
1769                         card->ext_csd.packed_event_en = 1;
1770                 }
1771         }
1772
1773         if (!oldcard)
1774                 host->card = card;
1775
1776         return 0;
1777
1778 free_card:
1779         if (!oldcard)
1780                 mmc_remove_card(card);
1781 err:
1782         return err;
1783 }
1784
1785 static int mmc_can_sleep(struct mmc_card *card)
1786 {
1787         return (card && card->ext_csd.rev >= 3);
1788 }
1789
1790 static int mmc_sleep(struct mmc_host *host)
1791 {
1792         struct mmc_command cmd = {0};
1793         struct mmc_card *card = host->card;
1794         unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1795         int err;
1796
1797         /* Re-tuning can't be done once the card is deselected */
1798         mmc_retune_hold(host);
1799
1800         err = mmc_deselect_cards(host);
1801         if (err)
1802                 goto out_release;
1803
1804         cmd.opcode = MMC_SLEEP_AWAKE;
1805         cmd.arg = card->rca << 16;
1806         cmd.arg |= 1 << 15;
1807
1808         /*
1809          * If the max_busy_timeout of the host is specified, validate it against
1810          * the sleep cmd timeout. A failure means we need to prevent the host
1811          * from doing hw busy detection, which is done by converting to a R1
1812          * response instead of a R1B.
1813          */
1814         if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1815                 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1816         } else {
1817                 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1818                 cmd.busy_timeout = timeout_ms;
1819         }
1820
1821         err = mmc_wait_for_cmd(host, &cmd, 0);
1822         if (err)
1823                 goto out_release;
1824
1825         /*
1826          * If the host does not wait while the card signals busy, then we will
1827          * will have to wait the sleep/awake timeout.  Note, we cannot use the
1828          * SEND_STATUS command to poll the status because that command (and most
1829          * others) is invalid while the card sleeps.
1830          */
1831         if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1832                 mmc_delay(timeout_ms);
1833
1834 out_release:
1835         mmc_retune_release(host);
1836         return err;
1837 }
1838
1839 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1840 {
1841         return card &&
1842                 mmc_card_mmc(card) &&
1843                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1844 }
1845
1846 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1847 {
1848         unsigned int timeout = card->ext_csd.generic_cmd6_time;
1849         int err;
1850
1851         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1852         if (notify_type == EXT_CSD_POWER_OFF_LONG)
1853                 timeout = card->ext_csd.power_off_longtime;
1854
1855         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1856                         EXT_CSD_POWER_OFF_NOTIFICATION,
1857                         notify_type, timeout, true, false, false);
1858         if (err)
1859                 pr_err("%s: Power Off Notification timed out, %u\n",
1860                        mmc_hostname(card->host), timeout);
1861
1862         /* Disable the power off notification after the switch operation. */
1863         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1864
1865         return err;
1866 }
1867
1868 /*
1869  * Host is being removed. Free up the current card.
1870  */
1871 static void mmc_remove(struct mmc_host *host)
1872 {
1873         BUG_ON(!host);
1874         BUG_ON(!host->card);
1875
1876         mmc_remove_card(host->card);
1877         host->card = NULL;
1878 }
1879
1880 /*
1881  * Card detection - card is alive.
1882  */
1883 static int mmc_alive(struct mmc_host *host)
1884 {
1885         return mmc_send_status(host->card, NULL);
1886 }
1887
1888 /*
1889  * Card detection callback from host.
1890  */
1891 static void mmc_detect(struct mmc_host *host)
1892 {
1893         int err;
1894
1895         BUG_ON(!host);
1896         BUG_ON(!host->card);
1897
1898         mmc_get_card(host->card);
1899
1900         /*
1901          * Just check if our card has been removed.
1902          */
1903         err = _mmc_detect_card_removed(host);
1904
1905         mmc_put_card(host->card);
1906
1907         if (err) {
1908                 mmc_remove(host);
1909
1910                 mmc_claim_host(host);
1911                 mmc_detach_bus(host);
1912                 mmc_power_off(host);
1913                 mmc_release_host(host);
1914         }
1915 }
1916
1917 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1918 {
1919         int err = 0;
1920         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1921                                         EXT_CSD_POWER_OFF_LONG;
1922
1923         BUG_ON(!host);
1924         BUG_ON(!host->card);
1925
1926         mmc_claim_host(host);
1927
1928         if (mmc_card_suspended(host->card))
1929                 goto out;
1930
1931         if (mmc_card_doing_bkops(host->card)) {
1932                 err = mmc_stop_bkops(host->card);
1933                 if (err)
1934                         goto out;
1935         }
1936
1937         err = mmc_flush_cache(host->card);
1938         if (err)
1939                 goto out;
1940
1941         if (mmc_can_poweroff_notify(host->card) &&
1942                 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1943                 err = mmc_poweroff_notify(host->card, notify_type);
1944         else if (mmc_can_sleep(host->card))
1945                 err = mmc_sleep(host);
1946         else if (!mmc_host_is_spi(host))
1947                 err = mmc_deselect_cards(host);
1948
1949         if (!err) {
1950                 mmc_power_off(host);
1951                 mmc_card_set_suspended(host->card);
1952         }
1953 out:
1954         mmc_release_host(host);
1955         return err;
1956 }
1957
1958 /*
1959  * Suspend callback
1960  */
1961 static int mmc_suspend(struct mmc_host *host)
1962 {
1963         int err;
1964
1965         err = _mmc_suspend(host, true);
1966         if (!err) {
1967                 pm_runtime_disable(&host->card->dev);
1968                 pm_runtime_set_suspended(&host->card->dev);
1969         }
1970
1971         return err;
1972 }
1973
1974 /*
1975  * This function tries to determine if the same card is still present
1976  * and, if so, restore all state to it.
1977  */
1978 static int _mmc_resume(struct mmc_host *host)
1979 {
1980         int err = 0;
1981
1982         BUG_ON(!host);
1983         BUG_ON(!host->card);
1984
1985         mmc_claim_host(host);
1986
1987         if (!mmc_card_suspended(host->card))
1988                 goto out;
1989
1990         mmc_power_up(host, host->card->ocr);
1991         err = mmc_init_card(host, host->card->ocr, host->card);
1992         mmc_card_clr_suspended(host->card);
1993
1994 out:
1995         mmc_release_host(host);
1996         return err;
1997 }
1998
1999 /*
2000  * Shutdown callback
2001  */
2002 static int mmc_shutdown(struct mmc_host *host)
2003 {
2004         int err = 0;
2005
2006         /*
2007          * In a specific case for poweroff notify, we need to resume the card
2008          * before we can shutdown it properly.
2009          */
2010         if (mmc_can_poweroff_notify(host->card) &&
2011                 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2012                 err = _mmc_resume(host);
2013
2014         if (!err)
2015                 err = _mmc_suspend(host, false);
2016
2017         return err;
2018 }
2019
2020 /*
2021  * Callback for resume.
2022  */
2023 static int mmc_resume(struct mmc_host *host)
2024 {
2025         pm_runtime_enable(&host->card->dev);
2026         return 0;
2027 }
2028
2029 /*
2030  * Callback for runtime_suspend.
2031  */
2032 static int mmc_runtime_suspend(struct mmc_host *host)
2033 {
2034         int err;
2035
2036         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2037                 return 0;
2038
2039         err = _mmc_suspend(host, true);
2040         if (err)
2041                 pr_err("%s: error %d doing aggressive suspend\n",
2042                         mmc_hostname(host), err);
2043
2044         return err;
2045 }
2046
2047 /*
2048  * Callback for runtime_resume.
2049  */
2050 static int mmc_runtime_resume(struct mmc_host *host)
2051 {
2052         int err;
2053
2054         err = _mmc_resume(host);
2055         if (err && err != -ENOMEDIUM)
2056                 pr_err("%s: error %d doing runtime resume\n",
2057                         mmc_hostname(host), err);
2058
2059         return 0;
2060 }
2061
2062 int mmc_can_reset(struct mmc_card *card)
2063 {
2064         u8 rst_n_function;
2065
2066         rst_n_function = card->ext_csd.rst_n_function;
2067         if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2068                 return 0;
2069         return 1;
2070 }
2071 EXPORT_SYMBOL(mmc_can_reset);
2072
2073 static int mmc_reset(struct mmc_host *host)
2074 {
2075         struct mmc_card *card = host->card;
2076
2077         /*
2078          * In the case of recovery, we can't expect flushing the cache to work
2079          * always, but we have a go and ignore errors.
2080          */
2081         mmc_flush_cache(host->card);
2082
2083         if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2084              mmc_can_reset(card)) {
2085                 /* If the card accept RST_n signal, send it. */
2086                 mmc_set_clock(host, host->f_init);
2087                 host->ops->hw_reset(host);
2088                 /* Set initial state and call mmc_set_ios */
2089                 mmc_set_initial_state(host);
2090         } else {
2091                 /* Do a brute force power cycle */
2092                 mmc_power_cycle(host, card->ocr);
2093         }
2094         return mmc_init_card(host, card->ocr, card);
2095 }
2096
2097 static const struct mmc_bus_ops mmc_ops = {
2098         .remove = mmc_remove,
2099         .detect = mmc_detect,
2100         .suspend = mmc_suspend,
2101         .resume = mmc_resume,
2102         .runtime_suspend = mmc_runtime_suspend,
2103         .runtime_resume = mmc_runtime_resume,
2104         .alive = mmc_alive,
2105         .shutdown = mmc_shutdown,
2106         .reset = mmc_reset,
2107 };
2108
2109 /*
2110  * Starting point for MMC card init.
2111  */
2112 int mmc_attach_mmc(struct mmc_host *host)
2113 {
2114         int err;
2115         u32 ocr, rocr;
2116
2117         BUG_ON(!host);
2118         WARN_ON(!host->claimed);
2119
2120         /* Set correct bus mode for MMC before attempting attach */
2121         if (!mmc_host_is_spi(host))
2122                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2123
2124         err = mmc_send_op_cond(host, 0, &ocr);
2125         if (err)
2126                 return err;
2127
2128         mmc_attach_bus(host, &mmc_ops);
2129         if (host->ocr_avail_mmc)
2130                 host->ocr_avail = host->ocr_avail_mmc;
2131
2132         /*
2133          * We need to get OCR a different way for SPI.
2134          */
2135         if (mmc_host_is_spi(host)) {
2136                 err = mmc_spi_read_ocr(host, 1, &ocr);
2137                 if (err)
2138                         goto err;
2139         }
2140
2141         rocr = mmc_select_voltage(host, ocr);
2142
2143         /*
2144          * Can we support the voltage of the card?
2145          */
2146         if (!rocr) {
2147                 err = -EINVAL;
2148                 goto err;
2149         }
2150
2151         /*
2152          * Detect and init the card.
2153          */
2154         err = mmc_init_card(host, rocr, NULL);
2155         if (err)
2156                 goto err;
2157
2158         mmc_release_host(host);
2159         err = mmc_add_card(host->card);
2160         if (err)
2161                 goto remove_card;
2162
2163         mmc_claim_host(host);
2164         return 0;
2165
2166 remove_card:
2167         mmc_remove_card(host->card);
2168         mmc_claim_host(host);
2169         host->card = NULL;
2170 err:
2171         mmc_detach_bus(host);
2172
2173         pr_err("%s: error %d whilst initialising MMC card\n",
2174                 mmc_hostname(host), err);
2175
2176         return err;
2177 }