drivers/mmc/core/mmc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/drivers/mmc/core/mmc.c
   4  *
   5  *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
   6  *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
   7  *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
   8  */
   9
  10 #include <linux/err.h>
  11 #include <linux/of.h>
  12 #include <linux/slab.h>
  13 #include <linux/stat.h>
  14 #include <linux/pm_runtime.h>
  15 #include <linux/random.h>
  16 #include <linux/sysfs.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 "card.h"
  24 #include "host.h"
  25 #include "bus.h"
  26 #include "mmc_ops.h"
  27 #include "quirks.h"
  28 #include "sd_ops.h"
  29 #include "pwrseq.h"
  30
  31 #define DEFAULT_CMD6_TIMEOUT_MS 500
  32 #define MIN_CACHE_EN_TIMEOUT_MS 1600
  33 #define CACHE_FLUSH_TIMEOUT_MS 30000 /* 30s */
  34
  35 static const unsigned int tran_exp[] = {
  36         10000,          100000,         1000000,        10000000,
  37         0,              0,              0,              0
  38 };
  39
  40 static const unsigned char tran_mant[] = {
  41         0,      10,     12,     13,     15,     20,     25,     30,
  42         35,     40,     45,     50,     55,     60,     70,     80,
  43 };
  44
  45 static const unsigned int taac_exp[] = {
  46         1,      10,     100,    1000,   10000,  100000, 1000000, 10000000,
  47 };
  48
  49 static const unsigned int taac_mant[] = {
  50         0,      10,     12,     13,     15,     20,     25,     30,
  51         35,     40,     45,     50,     55,     60,     70,     80,
  52 };
  53
  54 #define UNSTUFF_BITS(resp,start,size)                                   \
  55         ({                                                              \
  56                 const int __size = size;                                \
  57                 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
  58                 const int __off = 3 - ((start) / 32);                   \
  59                 const int __shft = (start) & 31;                        \
  60                 u32 __res;                                              \
  61                                                                         \
  62                 __res = resp[__off] >> __shft;                          \
  63                 if (__size + __shft > 32)                               \
  64                         __res |= resp[__off-1] << ((32 - __shft) % 32); \
  65                 __res & __mask;                                         \
  66         })
  67
  68 /*
  69  * Given the decoded CSD structure, decode the raw CID to our CID structure.
  70  */
  71 static int mmc_decode_cid(struct mmc_card *card)
  72 {
  73         u32 *resp = card->raw_cid;
  74
  75         /*
  76          * Add the raw card ID (cid) data to the entropy pool. It doesn't
  77          * matter that not all of it is unique, it's just bonus entropy.
  78          */
  79         add_device_randomness(&card->raw_cid, sizeof(card->raw_cid));
  80
  81         /*
  82          * The selection of the format here is based upon published
  83          * specs from sandisk and from what people have reported.
  84          */
  85         switch (card->csd.mmca_vsn) {
  86         case 0: /* MMC v1.0 - v1.2 */
  87         case 1: /* MMC v1.4 */
  88                 card->cid.manfid        = UNSTUFF_BITS(resp, 104, 24);
  89                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  90                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  91                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  92                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  93                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  94                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  95                 card->cid.prod_name[6]  = UNSTUFF_BITS(resp, 48, 8);
  96                 card->cid.hwrev         = UNSTUFF_BITS(resp, 44, 4);
  97                 card->cid.fwrev         = UNSTUFF_BITS(resp, 40, 4);
  98                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 24);
  99                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 100                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 101                 break;
 102
 103         case 2: /* MMC v2.0 - v2.2 */
 104         case 3: /* MMC v3.1 - v3.3 */
 105         case 4: /* MMC v4 */
 106                 card->cid.manfid        = UNSTUFF_BITS(resp, 120, 8);
 107                 card->cid.oemid         = UNSTUFF_BITS(resp, 104, 16);
 108                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
 109                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
 110                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
 111                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
 112                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
 113                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
 114                 card->cid.prv           = UNSTUFF_BITS(resp, 48, 8);
 115                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 32);
 116                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 117                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 118                 break;
 119
 120         default:
 121                 pr_err("%s: card has unknown MMCA version %d\n",
 122                         mmc_hostname(card->host), card->csd.mmca_vsn);
 123                 return -EINVAL;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static void mmc_set_erase_size(struct mmc_card *card)
 130 {
 131         if (card->ext_csd.erase_group_def & 1)
 132                 card->erase_size = card->ext_csd.hc_erase_size;
 133         else
 134                 card->erase_size = card->csd.erase_size;
 135
 136         mmc_init_erase(card);
 137 }
 138
 139 /*
 140  * Given a 128-bit response, decode to our card CSD structure.
 141  */
 142 static int mmc_decode_csd(struct mmc_card *card)
 143 {
 144         struct mmc_csd *csd = &card->csd;
 145         unsigned int e, m, a, b;
 146         u32 *resp = card->raw_csd;
 147
 148         /*
 149          * We only understand CSD structure v1.1 and v1.2.
 150          * v1.2 has extra information in bits 15, 11 and 10.
 151          * We also support eMMC v4.4 & v4.41.
 152          */
 153         csd->structure = UNSTUFF_BITS(resp, 126, 2);
 154         if (csd->structure == 0) {
 155                 pr_err("%s: unrecognised CSD structure version %d\n",
 156                         mmc_hostname(card->host), csd->structure);
 157                 return -EINVAL;
 158         }
 159
 160         csd->mmca_vsn    = UNSTUFF_BITS(resp, 122, 4);
 161         m = UNSTUFF_BITS(resp, 115, 4);
 162         e = UNSTUFF_BITS(resp, 112, 3);
 163         csd->taac_ns     = (taac_exp[e] * taac_mant[m] + 9) / 10;
 164         csd->taac_clks   = UNSTUFF_BITS(resp, 104, 8) * 100;
 165
 166         m = UNSTUFF_BITS(resp, 99, 4);
 167         e = UNSTUFF_BITS(resp, 96, 3);
 168         csd->max_dtr      = tran_exp[e] * tran_mant[m];
 169         csd->cmdclass     = UNSTUFF_BITS(resp, 84, 12);
 170
 171         e = UNSTUFF_BITS(resp, 47, 3);
 172         m = UNSTUFF_BITS(resp, 62, 12);
 173         csd->capacity     = (1 + m) << (e + 2);
 174
 175         csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
 176         csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 177         csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 178         csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
 179         csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
 180         csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 181         csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 182         csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 183
 184         if (csd->write_blkbits >= 9) {
 185                 a = UNSTUFF_BITS(resp, 42, 5);
 186                 b = UNSTUFF_BITS(resp, 37, 5);
 187                 csd->erase_size = (a + 1) * (b + 1);
 188                 csd->erase_size <<= csd->write_blkbits - 9;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static void mmc_select_card_type(struct mmc_card *card)
 195 {
 196         struct mmc_host *host = card->host;
 197         u8 card_type = card->ext_csd.raw_card_type;
 198         u32 caps = host->caps, caps2 = host->caps2;
 199         unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
 200         unsigned int avail_type = 0;
 201
 202         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 203             card_type & EXT_CSD_CARD_TYPE_HS_26) {
 204                 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
 205                 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
 206         }
 207
 208         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 209             card_type & EXT_CSD_CARD_TYPE_HS_52) {
 210                 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
 211                 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
 212         }
 213
 214         if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
 215             card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
 216                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 217                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
 218         }
 219
 220         if (caps & MMC_CAP_1_2V_DDR &&
 221             card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
 222                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 223                 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
 224         }
 225
 226         if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
 227             card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
 228                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 229                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
 230         }
 231
 232         if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
 233             card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
 234                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 235                 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
 236         }
 237
 238         if (caps2 & MMC_CAP2_HS400_1_8V &&
 239             card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
 240                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 241                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
 242         }
 243
 244         if (caps2 & MMC_CAP2_HS400_1_2V &&
 245             card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
 246                 hs200_max_dtr = MMC_HS200_MAX_DTR;
 247                 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
 248         }
 249
 250         if ((caps2 & MMC_CAP2_HS400_ES) &&
 251             card->ext_csd.strobe_support &&
 252             (avail_type & EXT_CSD_CARD_TYPE_HS400))
 253                 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
 254
 255         card->ext_csd.hs_max_dtr = hs_max_dtr;
 256         card->ext_csd.hs200_max_dtr = hs200_max_dtr;
 257         card->mmc_avail_type = avail_type;
 258 }
 259
 260 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
 261 {
 262         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 263
 264         /*
 265          * Disable these attributes by default
 266          */
 267         card->ext_csd.enhanced_area_offset = -EINVAL;
 268         card->ext_csd.enhanced_area_size = -EINVAL;
 269
 270         /*
 271          * Enhanced area feature support -- check whether the eMMC
 272          * card has the Enhanced area enabled.  If so, export enhanced
 273          * area offset and size to user by adding sysfs interface.
 274          */
 275         if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
 276             (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
 277                 if (card->ext_csd.partition_setting_completed) {
 278                         hc_erase_grp_sz =
 279                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 280                         hc_wp_grp_sz =
 281                                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 282
 283                         /*
 284                          * calculate the enhanced data area offset, in bytes
 285                          */
 286                         card->ext_csd.enhanced_area_offset =
 287                                 (((unsigned long long)ext_csd[139]) << 24) +
 288                                 (((unsigned long long)ext_csd[138]) << 16) +
 289                                 (((unsigned long long)ext_csd[137]) << 8) +
 290                                 (((unsigned long long)ext_csd[136]));
 291                         if (mmc_card_blockaddr(card))
 292                                 card->ext_csd.enhanced_area_offset <<= 9;
 293                         /*
 294                          * calculate the enhanced data area size, in kilobytes
 295                          */
 296                         card->ext_csd.enhanced_area_size =
 297                                 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
 298                                 ext_csd[140];
 299                         card->ext_csd.enhanced_area_size *=
 300                                 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
 301                         card->ext_csd.enhanced_area_size <<= 9;
 302                 } else {
 303                         pr_warn("%s: defines enhanced area without partition setting complete\n",
 304                                 mmc_hostname(card->host));
 305                 }
 306         }
 307 }
 308
 309 static void mmc_part_add(struct mmc_card *card, u64 size,
 310                          unsigned int part_cfg, char *name, int idx, bool ro,
 311                          int area_type)
 312 {
 313         card->part[card->nr_parts].size = size;
 314         card->part[card->nr_parts].part_cfg = part_cfg;
 315         sprintf(card->part[card->nr_parts].name, name, idx);
 316         card->part[card->nr_parts].force_ro = ro;
 317         card->part[card->nr_parts].area_type = area_type;
 318         card->nr_parts++;
 319 }
 320
 321 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
 322 {
 323         int idx;
 324         u8 hc_erase_grp_sz, hc_wp_grp_sz;
 325         u64 part_size;
 326
 327         /*
 328          * General purpose partition feature support --
 329          * If ext_csd has the size of general purpose partitions,
 330          * set size, part_cfg, partition name in mmc_part.
 331          */
 332         if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
 333             EXT_CSD_PART_SUPPORT_PART_EN) {
 334                 hc_erase_grp_sz =
 335                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 336                 hc_wp_grp_sz =
 337                         ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 338
 339                 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
 340                         if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
 341                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
 342                             !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
 343                                 continue;
 344                         if (card->ext_csd.partition_setting_completed == 0) {
 345                                 pr_warn("%s: has partition size defined without partition complete\n",
 346                                         mmc_hostname(card->host));
 347                                 break;
 348                         }
 349                         part_size =
 350                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
 351                                 << 16) +
 352                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
 353                                 << 8) +
 354                                 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
 355                         part_size *= (hc_erase_grp_sz * hc_wp_grp_sz);
 356                         mmc_part_add(card, part_size << 19,
 357                                 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
 358                                 "gp%d", idx, false,
 359                                 MMC_BLK_DATA_AREA_GP);
 360                 }
 361         }
 362 }
 363
 364 /* Minimum partition switch timeout in milliseconds */
 365 #define MMC_MIN_PART_SWITCH_TIME        300
 366
 367 /*
 368  * Decode extended CSD.
 369  */
 370 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 371 {
 372         int err = 0, idx;
 373         u64 part_size;
 374         struct device_node *np;
 375         bool broken_hpi = false;
 376
 377         /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 378         card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
 379         if (card->csd.structure == 3) {
 380                 if (card->ext_csd.raw_ext_csd_structure > 2) {
 381                         pr_err("%s: unrecognised EXT_CSD structure "
 382                                 "version %d\n", mmc_hostname(card->host),
 383                                         card->ext_csd.raw_ext_csd_structure);
 384                         err = -EINVAL;
 385                         goto out;
 386                 }
 387         }
 388
 389         np = mmc_of_find_child_device(card->host, 0);
 390         if (np && of_device_is_compatible(np, "mmc-card"))
 391                 broken_hpi = of_property_read_bool(np, "broken-hpi");
 392         of_node_put(np);
 393
 394         /*
 395          * The EXT_CSD format is meant to be forward compatible. As long
 396          * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
 397          * are authorized, see JEDEC JESD84-B50 section B.8.
 398          */
 399         card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 400
 401         /* fixup device after ext_csd revision field is updated */
 402         mmc_fixup_device(card, mmc_ext_csd_fixups);
 403
 404         card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 405         card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
 406         card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
 407         card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
 408         if (card->ext_csd.rev >= 2) {
 409                 card->ext_csd.sectors =
 410                         ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
 411                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
 412                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
 413                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 414
 415                 /* Cards with density > 2GiB are sector addressed */
 416                 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
 417                         mmc_card_set_blockaddr(card);
 418         }
 419
 420         card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
 421         card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 422         mmc_select_card_type(card);
 423
 424         card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
 425         card->ext_csd.raw_erase_timeout_mult =
 426                 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 427         card->ext_csd.raw_hc_erase_grp_size =
 428                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 429         card->ext_csd.raw_boot_mult =
 430                 ext_csd[EXT_CSD_BOOT_MULT];
 431         if (card->ext_csd.rev >= 3) {
 432                 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
 433                 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
 434
 435                 /* EXT_CSD value is in units of 10ms, but we store in ms */
 436                 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 437
 438                 /* Sleep / awake timeout in 100ns units */
 439                 if (sa_shift > 0 && sa_shift <= 0x17)
 440                         card->ext_csd.sa_timeout =
 441                                         1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
 442                 card->ext_csd.erase_group_def =
 443                         ext_csd[EXT_CSD_ERASE_GROUP_DEF];
 444                 card->ext_csd.hc_erase_timeout = 300 *
 445                         ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 446                 card->ext_csd.hc_erase_size =
 447                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
 448
 449                 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
 450
 451                 /*
 452                  * There are two boot regions of equal size, defined in
 453                  * multiples of 128K.
 454                  */
 455                 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
 456                         for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
 457                                 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 458                                 mmc_part_add(card, part_size,
 459                                         EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
 460                                         "boot%d", idx, true,
 461                                         MMC_BLK_DATA_AREA_BOOT);
 462                         }
 463                 }
 464         }
 465
 466         card->ext_csd.raw_hc_erase_gap_size =
 467                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 468         card->ext_csd.raw_sec_trim_mult =
 469                 ext_csd[EXT_CSD_SEC_TRIM_MULT];
 470         card->ext_csd.raw_sec_erase_mult =
 471                 ext_csd[EXT_CSD_SEC_ERASE_MULT];
 472         card->ext_csd.raw_sec_feature_support =
 473                 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 474         card->ext_csd.raw_trim_mult =
 475                 ext_csd[EXT_CSD_TRIM_MULT];
 476         card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 477         card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
 478         if (card->ext_csd.rev >= 4) {
 479                 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
 480                     EXT_CSD_PART_SETTING_COMPLETED)
 481                         card->ext_csd.partition_setting_completed = 1;
 482                 else
 483                         card->ext_csd.partition_setting_completed = 0;
 484
 485                 mmc_manage_enhanced_area(card, ext_csd);
 486
 487                 mmc_manage_gp_partitions(card, ext_csd);
 488
 489                 card->ext_csd.sec_trim_mult =
 490                         ext_csd[EXT_CSD_SEC_TRIM_MULT];
 491                 card->ext_csd.sec_erase_mult =
 492                         ext_csd[EXT_CSD_SEC_ERASE_MULT];
 493                 card->ext_csd.sec_feature_support =
 494                         ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 495                 card->ext_csd.trim_timeout = 300 *
 496                         ext_csd[EXT_CSD_TRIM_MULT];
 497
 498                 /*
 499                  * Note that the call to mmc_part_add above defaults to read
 500                  * only. If this default assumption is changed, the call must
 501                  * take into account the value of boot_locked below.
 502                  */
 503                 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
 504                 card->ext_csd.boot_ro_lockable = true;
 505
 506                 /* Save power class values */
 507                 card->ext_csd.raw_pwr_cl_52_195 =
 508                         ext_csd[EXT_CSD_PWR_CL_52_195];
 509                 card->ext_csd.raw_pwr_cl_26_195 =
 510                         ext_csd[EXT_CSD_PWR_CL_26_195];
 511                 card->ext_csd.raw_pwr_cl_52_360 =
 512                         ext_csd[EXT_CSD_PWR_CL_52_360];
 513                 card->ext_csd.raw_pwr_cl_26_360 =
 514                         ext_csd[EXT_CSD_PWR_CL_26_360];
 515                 card->ext_csd.raw_pwr_cl_200_195 =
 516                         ext_csd[EXT_CSD_PWR_CL_200_195];
 517                 card->ext_csd.raw_pwr_cl_200_360 =
 518                         ext_csd[EXT_CSD_PWR_CL_200_360];
 519                 card->ext_csd.raw_pwr_cl_ddr_52_195 =
 520                         ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
 521                 card->ext_csd.raw_pwr_cl_ddr_52_360 =
 522                         ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
 523                 card->ext_csd.raw_pwr_cl_ddr_200_360 =
 524                         ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
 525         }
 526
 527         if (card->ext_csd.rev >= 5) {
 528                 /* Adjust production date as per JEDEC JESD84-B451 */
 529                 if (card->cid.year < 2010)
 530                         card->cid.year += 16;
 531
 532                 /* check whether the eMMC card supports BKOPS */
 533                 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 534                         card->ext_csd.bkops = 1;
 535                         card->ext_csd.man_bkops_en =
 536                                         (ext_csd[EXT_CSD_BKOPS_EN] &
 537                                                 EXT_CSD_MANUAL_BKOPS_MASK);
 538                         card->ext_csd.raw_bkops_status =
 539                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 540                         if (card->ext_csd.man_bkops_en)
 541                                 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
 542                                         mmc_hostname(card->host));
 543                         card->ext_csd.auto_bkops_en =
 544                                         (ext_csd[EXT_CSD_BKOPS_EN] &
 545                                                 EXT_CSD_AUTO_BKOPS_MASK);
 546                         if (card->ext_csd.auto_bkops_en)
 547                                 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
 548                                         mmc_hostname(card->host));
 549                 }
 550
 551                 /* check whether the eMMC card supports HPI */
 552                 if (!mmc_card_broken_hpi(card) &&
 553                     !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
 554                         card->ext_csd.hpi = 1;
 555                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 556                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 557                         else
 558                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 559                         /*
 560                          * Indicate the maximum timeout to close
 561                          * a command interrupted by HPI
 562                          */
 563                         card->ext_csd.out_of_int_time =
 564                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 565                 }
 566
 567                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 568                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 569
 570                 /*
 571                  * RPMB regions are defined in multiples of 128K.
 572                  */
 573                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 574                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 575                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 576                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 577                                 "rpmb", 0, false,
 578                                 MMC_BLK_DATA_AREA_RPMB);
 579                 }
 580         }
 581
 582         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 583         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 584                 card->erased_byte = 0xFF;
 585         else
 586                 card->erased_byte = 0x0;
 587
 588         /* eMMC v4.5 or later */
 589         card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
 590         if (card->ext_csd.rev >= 6) {
 591                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 592
 593                 card->ext_csd.generic_cmd6_time = 10 *
 594                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 595                 card->ext_csd.power_off_longtime = 10 *
 596                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 597
 598                 card->ext_csd.cache_size =
 599                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 600                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 601                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 602                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 603
 604                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 605                         card->ext_csd.data_sector_size = 4096;
 606                 else
 607                         card->ext_csd.data_sector_size = 512;
 608
 609                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 610                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 611                         card->ext_csd.data_tag_unit_size =
 612                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 613                         (card->ext_csd.data_sector_size);
 614                 } else {
 615                         card->ext_csd.data_tag_unit_size = 0;
 616                 }
 617
 618                 card->ext_csd.max_packed_writes =
 619                         ext_csd[EXT_CSD_MAX_PACKED_WRITES];
 620                 card->ext_csd.max_packed_reads =
 621                         ext_csd[EXT_CSD_MAX_PACKED_READS];
 622         } else {
 623                 card->ext_csd.data_sector_size = 512;
 624         }
 625
 626         /*
 627          * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
 628          * when accessing a specific field", so use it here if there is no
 629          * PARTITION_SWITCH_TIME.
 630          */
 631         if (!card->ext_csd.part_time)
 632                 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
 633         /* Some eMMC set the value too low so set a minimum */
 634         if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
 635                 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
 636
 637         /* eMMC v5 or later */
 638         if (card->ext_csd.rev >= 7) {
 639                 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
 640                        MMC_FIRMWARE_LEN);
 641                 card->ext_csd.ffu_capable =
 642                         (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
 643                         !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
 644
 645                 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
 646                 card->ext_csd.device_life_time_est_typ_a =
 647                         ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
 648                 card->ext_csd.device_life_time_est_typ_b =
 649                         ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
 650         }
 651
 652         /* eMMC v5.1 or later */
 653         if (card->ext_csd.rev >= 8) {
 654                 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
 655                                              EXT_CSD_CMDQ_SUPPORTED;
 656                 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
 657                                             EXT_CSD_CMDQ_DEPTH_MASK) + 1;
 658                 /* Exclude inefficiently small queue depths */
 659                 if (card->ext_csd.cmdq_depth <= 2) {
 660                         card->ext_csd.cmdq_support = false;
 661                         card->ext_csd.cmdq_depth = 0;
 662                 }
 663                 if (card->ext_csd.cmdq_support) {
 664                         pr_debug("%s: Command Queue supported depth %u\n",
 665                                  mmc_hostname(card->host),
 666                                  card->ext_csd.cmdq_depth);
 667                 }
 668                 card->ext_csd.enhanced_rpmb_supported =
 669                                         (card->ext_csd.rel_param &
 670                                          EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR);
 671         }
 672 out:
 673         return err;
 674 }
 675
 676 static int mmc_read_ext_csd(struct mmc_card *card)
 677 {
 678         u8 *ext_csd;
 679         int err;
 680
 681         if (!mmc_can_ext_csd(card))
 682                 return 0;
 683
 684         err = mmc_get_ext_csd(card, &ext_csd);
 685         if (err) {
 686                 /* If the host or the card can't do the switch,
 687                  * fail more gracefully. */
 688                 if ((err != -EINVAL)
 689                  && (err != -ENOSYS)
 690                  && (err != -EFAULT))
 691                         return err;
 692
 693                 /*
 694                  * High capacity cards should have this "magic" size
 695                  * stored in their CSD.
 696                  */
 697                 if (card->csd.capacity == (4096 * 512)) {
 698                         pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
 699                                 mmc_hostname(card->host));
 700                 } else {
 701                         pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
 702                                 mmc_hostname(card->host));
 703                         err = 0;
 704                 }
 705
 706                 return err;
 707         }
 708
 709         err = mmc_decode_ext_csd(card, ext_csd);
 710         kfree(ext_csd);
 711         return err;
 712 }
 713
 714 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 715 {
 716         u8 *bw_ext_csd;
 717         int err;
 718
 719         if (bus_width == MMC_BUS_WIDTH_1)
 720                 return 0;
 721
 722         err = mmc_get_ext_csd(card, &bw_ext_csd);
 723         if (err)
 724                 return err;
 725
 726         /* only compare read only fields */
 727         err = !((card->ext_csd.raw_partition_support ==
 728                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 729                 (card->ext_csd.raw_erased_mem_count ==
 730                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 731                 (card->ext_csd.rev ==
 732                         bw_ext_csd[EXT_CSD_REV]) &&
 733                 (card->ext_csd.raw_ext_csd_structure ==
 734                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 735                 (card->ext_csd.raw_card_type ==
 736                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 737                 (card->ext_csd.raw_s_a_timeout ==
 738                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 739                 (card->ext_csd.raw_hc_erase_gap_size ==
 740                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 741                 (card->ext_csd.raw_erase_timeout_mult ==
 742                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 743                 (card->ext_csd.raw_hc_erase_grp_size ==
 744                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 745                 (card->ext_csd.raw_sec_trim_mult ==
 746                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 747                 (card->ext_csd.raw_sec_erase_mult ==
 748                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 749                 (card->ext_csd.raw_sec_feature_support ==
 750                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 751                 (card->ext_csd.raw_trim_mult ==
 752                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 753                 (card->ext_csd.raw_sectors[0] ==
 754                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 755                 (card->ext_csd.raw_sectors[1] ==
 756                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 757                 (card->ext_csd.raw_sectors[2] ==
 758                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 759                 (card->ext_csd.raw_sectors[3] ==
 760                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
 761                 (card->ext_csd.raw_pwr_cl_52_195 ==
 762                         bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
 763                 (card->ext_csd.raw_pwr_cl_26_195 ==
 764                         bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
 765                 (card->ext_csd.raw_pwr_cl_52_360 ==
 766                         bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
 767                 (card->ext_csd.raw_pwr_cl_26_360 ==
 768                         bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
 769                 (card->ext_csd.raw_pwr_cl_200_195 ==
 770                         bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
 771                 (card->ext_csd.raw_pwr_cl_200_360 ==
 772                         bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
 773                 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
 774                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
 775                 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
 776                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
 777                 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
 778                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
 779
 780         if (err)
 781                 err = -EINVAL;
 782
 783         kfree(bw_ext_csd);
 784         return err;
 785 }
 786
 787 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 788         card->raw_cid[2], card->raw_cid[3]);
 789 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 790         card->raw_csd[2], card->raw_csd[3]);
 791 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 792 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 793 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 794 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
 795 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 796 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 797 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 798 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 799 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
 800 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
 801 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
 802 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
 803         card->ext_csd.device_life_time_est_typ_a,
 804         card->ext_csd.device_life_time_est_typ_b);
 805 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 806 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 807                 card->ext_csd.enhanced_area_offset);
 808 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 809 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 810 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n",
 811         card->ext_csd.enhanced_rpmb_supported);
 812 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 813 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
 814 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
 815 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
 816
 817 static ssize_t mmc_fwrev_show(struct device *dev,
 818                               struct device_attribute *attr,
 819                               char *buf)
 820 {
 821         struct mmc_card *card = mmc_dev_to_card(dev);
 822
 823         if (card->ext_csd.rev < 7)
 824                 return sysfs_emit(buf, "0x%x\n", card->cid.fwrev);
 825         else
 826                 return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
 827                                   card->ext_csd.fwrev);
 828 }
 829
 830 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
 831
 832 static ssize_t mmc_dsr_show(struct device *dev,
 833                             struct device_attribute *attr,
 834                             char *buf)
 835 {
 836         struct mmc_card *card = mmc_dev_to_card(dev);
 837         struct mmc_host *host = card->host;
 838
 839         if (card->csd.dsr_imp && host->dsr_req)
 840                 return sysfs_emit(buf, "0x%x\n", host->dsr);
 841         else
 842                 /* return default DSR value */
 843                 return sysfs_emit(buf, "0x%x\n", 0x404);
 844 }
 845
 846 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
 847
 848 static struct attribute *mmc_std_attrs[] = {
 849         &dev_attr_cid.attr,
 850         &dev_attr_csd.attr,
 851         &dev_attr_date.attr,
 852         &dev_attr_erase_size.attr,
 853         &dev_attr_preferred_erase_size.attr,
 854         &dev_attr_fwrev.attr,
 855         &dev_attr_ffu_capable.attr,
 856         &dev_attr_hwrev.attr,
 857         &dev_attr_manfid.attr,
 858         &dev_attr_name.attr,
 859         &dev_attr_oemid.attr,
 860         &dev_attr_prv.attr,
 861         &dev_attr_rev.attr,
 862         &dev_attr_pre_eol_info.attr,
 863         &dev_attr_life_time.attr,
 864         &dev_attr_serial.attr,
 865         &dev_attr_enhanced_area_offset.attr,
 866         &dev_attr_enhanced_area_size.attr,
 867         &dev_attr_raw_rpmb_size_mult.attr,
 868         &dev_attr_enhanced_rpmb_supported.attr,
 869         &dev_attr_rel_sectors.attr,
 870         &dev_attr_ocr.attr,
 871         &dev_attr_rca.attr,
 872         &dev_attr_dsr.attr,
 873         &dev_attr_cmdq_en.attr,
 874         NULL,
 875 };
 876 ATTRIBUTE_GROUPS(mmc_std);
 877
 878 static struct device_type mmc_type = {
 879         .groups = mmc_std_groups,
 880 };
 881
 882 /*
 883  * Select the PowerClass for the current bus width
 884  * If power class is defined for 4/8 bit bus in the
 885  * extended CSD register, select it by executing the
 886  * mmc_switch command.
 887  */
 888 static int __mmc_select_powerclass(struct mmc_card *card,
 889                                    unsigned int bus_width)
 890 {
 891         struct mmc_host *host = card->host;
 892         struct mmc_ext_csd *ext_csd = &card->ext_csd;
 893         unsigned int pwrclass_val = 0;
 894         int err = 0;
 895
 896         switch (1 << host->ios.vdd) {
 897         case MMC_VDD_165_195:
 898                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 899                         pwrclass_val = ext_csd->raw_pwr_cl_26_195;
 900                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 901                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 902                                 ext_csd->raw_pwr_cl_52_195 :
 903                                 ext_csd->raw_pwr_cl_ddr_52_195;
 904                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 905                         pwrclass_val = ext_csd->raw_pwr_cl_200_195;
 906                 break;
 907         case MMC_VDD_27_28:
 908         case MMC_VDD_28_29:
 909         case MMC_VDD_29_30:
 910         case MMC_VDD_30_31:
 911         case MMC_VDD_31_32:
 912         case MMC_VDD_32_33:
 913         case MMC_VDD_33_34:
 914         case MMC_VDD_34_35:
 915         case MMC_VDD_35_36:
 916                 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
 917                         pwrclass_val = ext_csd->raw_pwr_cl_26_360;
 918                 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
 919                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 920                                 ext_csd->raw_pwr_cl_52_360 :
 921                                 ext_csd->raw_pwr_cl_ddr_52_360;
 922                 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
 923                         pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
 924                                 ext_csd->raw_pwr_cl_ddr_200_360 :
 925                                 ext_csd->raw_pwr_cl_200_360;
 926                 break;
 927         default:
 928                 pr_warn("%s: Voltage range not supported for power class\n",
 929                         mmc_hostname(host));
 930                 return -EINVAL;
 931         }
 932
 933         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 934                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 935                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 936         else
 937                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 938                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 939
 940         /* If the power class is different from the default value */
 941         if (pwrclass_val > 0) {
 942                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 943                                  EXT_CSD_POWER_CLASS,
 944                                  pwrclass_val,
 945                                  card->ext_csd.generic_cmd6_time);
 946         }
 947
 948         return err;
 949 }
 950
 951 static int mmc_select_powerclass(struct mmc_card *card)
 952 {
 953         struct mmc_host *host = card->host;
 954         u32 bus_width, ext_csd_bits;
 955         int err, ddr;
 956
 957         /* Power class selection is supported for versions >= 4.0 */
 958         if (!mmc_can_ext_csd(card))
 959                 return 0;
 960
 961         bus_width = host->ios.bus_width;
 962         /* Power class values are defined only for 4/8 bit bus */
 963         if (bus_width == MMC_BUS_WIDTH_1)
 964                 return 0;
 965
 966         ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
 967         if (ddr)
 968                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 969                         EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
 970         else
 971                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
 972                         EXT_CSD_BUS_WIDTH_8 :  EXT_CSD_BUS_WIDTH_4;
 973
 974         err = __mmc_select_powerclass(card, ext_csd_bits);
 975         if (err)
 976                 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
 977                         mmc_hostname(host), 1 << bus_width, ddr);
 978
 979         return err;
 980 }
 981
 982 /*
 983  * Set the bus speed for the selected speed mode.
 984  */
 985 static void mmc_set_bus_speed(struct mmc_card *card)
 986 {
 987         unsigned int max_dtr = (unsigned int)-1;
 988
 989         if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
 990              max_dtr > card->ext_csd.hs200_max_dtr)
 991                 max_dtr = card->ext_csd.hs200_max_dtr;
 992         else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
 993                 max_dtr = card->ext_csd.hs_max_dtr;
 994         else if (max_dtr > card->csd.max_dtr)
 995                 max_dtr = card->csd.max_dtr;
 996
 997         mmc_set_clock(card->host, max_dtr);
 998 }
 999
1000 /*
1001  * Select the bus width amoung 4-bit and 8-bit(SDR).
1002  * If the bus width is changed successfully, return the selected width value.
1003  * Zero is returned instead of error value if the wide width is not supported.
1004  */
1005 static int mmc_select_bus_width(struct mmc_card *card)
1006 {
1007         static unsigned ext_csd_bits[] = {
1008                 EXT_CSD_BUS_WIDTH_8,
1009                 EXT_CSD_BUS_WIDTH_4,
1010         };
1011         static unsigned bus_widths[] = {
1012                 MMC_BUS_WIDTH_8,
1013                 MMC_BUS_WIDTH_4,
1014         };
1015         struct mmc_host *host = card->host;
1016         unsigned idx, bus_width = 0;
1017         int err = 0;
1018
1019         if (!mmc_can_ext_csd(card) ||
1020             !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1021                 return 0;
1022
1023         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1024
1025         /*
1026          * Unlike SD, MMC cards dont have a configuration register to notify
1027          * supported bus width. So bus test command should be run to identify
1028          * the supported bus width or compare the ext csd values of current
1029          * bus width and ext csd values of 1 bit mode read earlier.
1030          */
1031         for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1032                 /*
1033                  * Host is capable of 8bit transfer, then switch
1034                  * the device to work in 8bit transfer mode. If the
1035                  * mmc switch command returns error then switch to
1036                  * 4bit transfer mode. On success set the corresponding
1037                  * bus width on the host.
1038                  */
1039                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1040                                  EXT_CSD_BUS_WIDTH,
1041                                  ext_csd_bits[idx],
1042                                  card->ext_csd.generic_cmd6_time);
1043                 if (err)
1044                         continue;
1045
1046                 bus_width = bus_widths[idx];
1047                 mmc_set_bus_width(host, bus_width);
1048
1049                 /*
1050                  * If controller can't handle bus width test,
1051                  * compare ext_csd previously read in 1 bit mode
1052                  * against ext_csd at new bus width
1053                  */
1054                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1055                         err = mmc_compare_ext_csds(card, bus_width);
1056                 else
1057                         err = mmc_bus_test(card, bus_width);
1058
1059                 if (!err) {
1060                         err = bus_width;
1061                         break;
1062                 } else {
1063                         pr_warn("%s: switch to bus width %d failed\n",
1064                                 mmc_hostname(host), 1 << bus_width);
1065                 }
1066         }
1067
1068         return err;
1069 }
1070
1071 /*
1072  * Switch to the high-speed mode
1073  */
1074 static int mmc_select_hs(struct mmc_card *card)
1075 {
1076         int err;
1077
1078         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1079                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1080                            card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1081                            true, true, MMC_CMD_RETRIES);
1082         if (err)
1083                 pr_warn("%s: switch to high-speed failed, err:%d\n",
1084                         mmc_hostname(card->host), err);
1085
1086         return err;
1087 }
1088
1089 /*
1090  * Activate wide bus and DDR if supported.
1091  */
1092 static int mmc_select_hs_ddr(struct mmc_card *card)
1093 {
1094         struct mmc_host *host = card->host;
1095         u32 bus_width, ext_csd_bits;
1096         int err = 0;
1097
1098         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1099                 return 0;
1100
1101         bus_width = host->ios.bus_width;
1102         if (bus_width == MMC_BUS_WIDTH_1)
1103                 return 0;
1104
1105         ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1106                 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1107
1108         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1109                            EXT_CSD_BUS_WIDTH,
1110                            ext_csd_bits,
1111                            card->ext_csd.generic_cmd6_time,
1112                            MMC_TIMING_MMC_DDR52,
1113                            true, true, MMC_CMD_RETRIES);
1114         if (err) {
1115                 pr_err("%s: switch to bus width %d ddr failed\n",
1116                         mmc_hostname(host), 1 << bus_width);
1117                 return err;
1118         }
1119
1120         /*
1121          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1122          * signaling.
1123          *
1124          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1125          *
1126          * 1.8V vccq at 3.3V core voltage (vcc) is not required
1127          * in the JEDEC spec for DDR.
1128          *
1129          * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1130          * host controller can support this, like some of the SDHCI
1131          * controller which connect to an eMMC device. Some of these
1132          * host controller still needs to use 1.8v vccq for supporting
1133          * DDR mode.
1134          *
1135          * So the sequence will be:
1136          * if (host and device can both support 1.2v IO)
1137          *      use 1.2v IO;
1138          * else if (host and device can both support 1.8v IO)
1139          *      use 1.8v IO;
1140          * so if host and device can only support 3.3v IO, this is the
1141          * last choice.
1142          *
1143          * WARNING: eMMC rules are NOT the same as SD DDR
1144          */
1145         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1146                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1147                 if (!err)
1148                         return 0;
1149         }
1150
1151         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1152             host->caps & MMC_CAP_1_8V_DDR)
1153                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1154
1155         /* make sure vccq is 3.3v after switching disaster */
1156         if (err)
1157                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1158
1159         return err;
1160 }
1161
1162 static int mmc_select_hs400(struct mmc_card *card)
1163 {
1164         struct mmc_host *host = card->host;
1165         unsigned int max_dtr;
1166         int err = 0;
1167         u8 val;
1168
1169         /*
1170          * HS400 mode requires 8-bit bus width
1171          */
1172         if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1173               host->ios.bus_width == MMC_BUS_WIDTH_8))
1174                 return 0;
1175
1176         /* Switch card to HS mode */
1177         val = EXT_CSD_TIMING_HS;
1178         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1179                            EXT_CSD_HS_TIMING, val,
1180                            card->ext_csd.generic_cmd6_time, 0,
1181                            false, true, MMC_CMD_RETRIES);
1182         if (err) {
1183                 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1184                         mmc_hostname(host), err);
1185                 return err;
1186         }
1187
1188         /* Prepare host to downgrade to HS timing */
1189         if (host->ops->hs400_downgrade)
1190                 host->ops->hs400_downgrade(host);
1191
1192         /* Set host controller to HS timing */
1193         mmc_set_timing(host, MMC_TIMING_MMC_HS);
1194
1195         /* Reduce frequency to HS frequency */
1196         max_dtr = card->ext_csd.hs_max_dtr;
1197         mmc_set_clock(host, max_dtr);
1198
1199         err = mmc_switch_status(card, true);
1200         if (err)
1201                 goto out_err;
1202
1203         if (host->ops->hs400_prepare_ddr)
1204                 host->ops->hs400_prepare_ddr(host);
1205
1206         /* Switch card to DDR */
1207         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1208                          EXT_CSD_BUS_WIDTH,
1209                          EXT_CSD_DDR_BUS_WIDTH_8,
1210                          card->ext_csd.generic_cmd6_time);
1211         if (err) {
1212                 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1213                         mmc_hostname(host), err);
1214                 return err;
1215         }
1216
1217         /* Switch card to HS400 */
1218         val = EXT_CSD_TIMING_HS400 |
1219               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1220         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1221                            EXT_CSD_HS_TIMING, val,
1222                            card->ext_csd.generic_cmd6_time, 0,
1223                            false, true, MMC_CMD_RETRIES);
1224         if (err) {
1225                 pr_err("%s: switch to hs400 failed, err:%d\n",
1226                          mmc_hostname(host), err);
1227                 return err;
1228         }
1229
1230         /* Set host controller to HS400 timing and frequency */
1231         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1232         mmc_set_bus_speed(card);
1233
1234         if (host->ops->execute_hs400_tuning) {
1235                 mmc_retune_disable(host);
1236                 err = host->ops->execute_hs400_tuning(host, card);
1237                 mmc_retune_enable(host);
1238                 if (err)
1239                         goto out_err;
1240         }
1241
1242         if (host->ops->hs400_complete)
1243                 host->ops->hs400_complete(host);
1244
1245         err = mmc_switch_status(card, true);
1246         if (err)
1247                 goto out_err;
1248
1249         return 0;
1250
1251 out_err:
1252         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1253                __func__, err);
1254         return err;
1255 }
1256
1257 int mmc_hs200_to_hs400(struct mmc_card *card)
1258 {
1259         return mmc_select_hs400(card);
1260 }
1261
1262 int mmc_hs400_to_hs200(struct mmc_card *card)
1263 {
1264         struct mmc_host *host = card->host;
1265         unsigned int max_dtr;
1266         int err;
1267         u8 val;
1268
1269         /* Reduce frequency to HS */
1270         max_dtr = card->ext_csd.hs_max_dtr;
1271         mmc_set_clock(host, max_dtr);
1272
1273         /* Switch HS400 to HS DDR */
1274         val = EXT_CSD_TIMING_HS;
1275         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1276                            val, card->ext_csd.generic_cmd6_time, 0,
1277                            false, true, MMC_CMD_RETRIES);
1278         if (err)
1279                 goto out_err;
1280
1281         if (host->ops->hs400_downgrade)
1282                 host->ops->hs400_downgrade(host);
1283
1284         mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1285
1286         err = mmc_switch_status(card, true);
1287         if (err)
1288                 goto out_err;
1289
1290         /* Switch HS DDR to HS */
1291         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1292                            EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1293                            0, false, true, MMC_CMD_RETRIES);
1294         if (err)
1295                 goto out_err;
1296
1297         mmc_set_timing(host, MMC_TIMING_MMC_HS);
1298
1299         err = mmc_switch_status(card, true);
1300         if (err)
1301                 goto out_err;
1302
1303         /* Switch HS to HS200 */
1304         val = EXT_CSD_TIMING_HS200 |
1305               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1306         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1307                            val, card->ext_csd.generic_cmd6_time, 0,
1308                            false, true, MMC_CMD_RETRIES);
1309         if (err)
1310                 goto out_err;
1311
1312         mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1313
1314         /*
1315          * For HS200, CRC errors are not a reliable way to know the switch
1316          * failed. If there really is a problem, we would expect tuning will
1317          * fail and the result ends up the same.
1318          */
1319         err = mmc_switch_status(card, false);
1320         if (err)
1321                 goto out_err;
1322
1323         mmc_set_bus_speed(card);
1324
1325         /* Prepare tuning for HS400 mode. */
1326         if (host->ops->prepare_hs400_tuning)
1327                 host->ops->prepare_hs400_tuning(host, &host->ios);
1328
1329         return 0;
1330
1331 out_err:
1332         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1333                __func__, err);
1334         return err;
1335 }
1336
1337 static void mmc_select_driver_type(struct mmc_card *card)
1338 {
1339         int card_drv_type, drive_strength, drv_type = 0;
1340         int fixed_drv_type = card->host->fixed_drv_type;
1341
1342         card_drv_type = card->ext_csd.raw_driver_strength |
1343                         mmc_driver_type_mask(0);
1344
1345         if (fixed_drv_type >= 0)
1346                 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1347                                  ? fixed_drv_type : 0;
1348         else
1349                 drive_strength = mmc_select_drive_strength(card,
1350                                                            card->ext_csd.hs200_max_dtr,
1351                                                            card_drv_type, &drv_type);
1352
1353         card->drive_strength = drive_strength;
1354
1355         if (drv_type)
1356                 mmc_set_driver_type(card->host, drv_type);
1357 }
1358
1359 static int mmc_select_hs400es(struct mmc_card *card)
1360 {
1361         struct mmc_host *host = card->host;
1362         int err = -EINVAL;
1363         u8 val;
1364
1365         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1366                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1367
1368         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1369                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1370
1371         /* If fails try again during next card power cycle */
1372         if (err)
1373                 goto out_err;
1374
1375         err = mmc_select_bus_width(card);
1376         if (err != MMC_BUS_WIDTH_8) {
1377                 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1378                         mmc_hostname(host), err);
1379                 err = err < 0 ? err : -ENOTSUPP;
1380                 goto out_err;
1381         }
1382
1383         /* Switch card to HS mode */
1384         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1385                            EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1386                            card->ext_csd.generic_cmd6_time, 0,
1387                            false, true, MMC_CMD_RETRIES);
1388         if (err) {
1389                 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1390                         mmc_hostname(host), err);
1391                 goto out_err;
1392         }
1393
1394         /*
1395          * Bump to HS timing and frequency. Some cards don't handle
1396          * SEND_STATUS reliably at the initial frequency.
1397          */
1398         mmc_set_timing(host, MMC_TIMING_MMC_HS);
1399         mmc_set_bus_speed(card);
1400
1401         err = mmc_switch_status(card, true);
1402         if (err)
1403                 goto out_err;
1404
1405         /* Switch card to DDR with strobe bit */
1406         val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1407         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1408                          EXT_CSD_BUS_WIDTH,
1409                          val,
1410                          card->ext_csd.generic_cmd6_time);
1411         if (err) {
1412                 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1413                         mmc_hostname(host), err);
1414                 goto out_err;
1415         }
1416
1417         mmc_select_driver_type(card);
1418
1419         /* Switch card to HS400 */
1420         val = EXT_CSD_TIMING_HS400 |
1421               card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1422         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1423                            EXT_CSD_HS_TIMING, val,
1424                            card->ext_csd.generic_cmd6_time, 0,
1425                            false, true, MMC_CMD_RETRIES);
1426         if (err) {
1427                 pr_err("%s: switch to hs400es failed, err:%d\n",
1428                         mmc_hostname(host), err);
1429                 goto out_err;
1430         }
1431
1432         /* Set host controller to HS400 timing and frequency */
1433         mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1434
1435         /* Controller enable enhanced strobe function */
1436         host->ios.enhanced_strobe = true;
1437         if (host->ops->hs400_enhanced_strobe)
1438                 host->ops->hs400_enhanced_strobe(host, &host->ios);
1439
1440         err = mmc_switch_status(card, true);
1441         if (err)
1442                 goto out_err;
1443
1444         return 0;
1445
1446 out_err:
1447         pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1448                __func__, err);
1449         return err;
1450 }
1451
1452 /*
1453  * For device supporting HS200 mode, the following sequence
1454  * should be done before executing the tuning process.
1455  * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1456  * 2. switch to HS200 mode
1457  * 3. set the clock to > 52Mhz and <=200MHz
1458  */
1459 static int mmc_select_hs200(struct mmc_card *card)
1460 {
1461         struct mmc_host *host = card->host;
1462         unsigned int old_timing, old_signal_voltage, old_clock;
1463         int err = -EINVAL;
1464         u8 val;
1465
1466         old_signal_voltage = host->ios.signal_voltage;
1467         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1468                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1469
1470         if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1471                 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1472
1473         /* If fails try again during next card power cycle */
1474         if (err)
1475                 return err;
1476
1477         mmc_select_driver_type(card);
1478
1479         /*
1480          * Set the bus width(4 or 8) with host's support and
1481          * switch to HS200 mode if bus width is set successfully.
1482          */
1483         err = mmc_select_bus_width(card);
1484         if (err > 0) {
1485                 val = EXT_CSD_TIMING_HS200 |
1486                       card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1487                 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1488                                    EXT_CSD_HS_TIMING, val,
1489                                    card->ext_csd.generic_cmd6_time, 0,
1490                                    false, true, MMC_CMD_RETRIES);
1491                 if (err)
1492                         goto err;
1493
1494                 /*
1495                  * Bump to HS timing and frequency. Some cards don't handle
1496                  * SEND_STATUS reliably at the initial frequency.
1497                  * NB: We can't move to full (HS200) speeds until after we've
1498                  * successfully switched over.
1499                  */
1500                 old_timing = host->ios.timing;
1501                 old_clock = host->ios.clock;
1502                 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1503                 mmc_set_clock(card->host, card->ext_csd.hs_max_dtr);
1504
1505                 /*
1506                  * For HS200, CRC errors are not a reliable way to know the
1507                  * switch failed. If there really is a problem, we would expect
1508                  * tuning will fail and the result ends up the same.
1509                  */
1510                 err = mmc_switch_status(card, false);
1511
1512                 /*
1513                  * mmc_select_timing() assumes timing has not changed if
1514                  * it is a switch error.
1515                  */
1516                 if (err == -EBADMSG) {
1517                         mmc_set_clock(host, old_clock);
1518                         mmc_set_timing(host, old_timing);
1519                 }
1520         }
1521 err:
1522         if (err) {
1523                 /* fall back to the old signal voltage, if fails report error */
1524                 if (mmc_set_signal_voltage(host, old_signal_voltage))
1525                         err = -EIO;
1526
1527                 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1528                        __func__, err);
1529         }
1530         return err;
1531 }
1532
1533 /*
1534  * Activate High Speed, HS200 or HS400ES mode if supported.
1535  */
1536 static int mmc_select_timing(struct mmc_card *card)
1537 {
1538         int err = 0;
1539
1540         if (!mmc_can_ext_csd(card))
1541                 goto bus_speed;
1542
1543         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
1544                 err = mmc_select_hs400es(card);
1545                 goto out;
1546         }
1547
1548         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) {
1549                 err = mmc_select_hs200(card);
1550                 if (err == -EBADMSG)
1551                         card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200;
1552                 else
1553                         goto out;
1554         }
1555
1556         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1557                 err = mmc_select_hs(card);
1558
1559 out:
1560         if (err && err != -EBADMSG)
1561                 return err;
1562
1563 bus_speed:
1564         /*
1565          * Set the bus speed to the selected bus timing.
1566          * If timing is not selected, backward compatible is the default.
1567          */
1568         mmc_set_bus_speed(card);
1569         return 0;
1570 }
1571
1572 /*
1573  * Execute tuning sequence to seek the proper bus operating
1574  * conditions for HS200 and HS400, which sends CMD21 to the device.
1575  */
1576 static int mmc_hs200_tuning(struct mmc_card *card)
1577 {
1578         struct mmc_host *host = card->host;
1579
1580         /*
1581          * Timing should be adjusted to the HS400 target
1582          * operation frequency for tuning process
1583          */
1584         if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1585             host->ios.bus_width == MMC_BUS_WIDTH_8)
1586                 if (host->ops->prepare_hs400_tuning)
1587                         host->ops->prepare_hs400_tuning(host, &host->ios);
1588
1589         return mmc_execute_tuning(card);
1590 }
1591
1592 /*
1593  * Handle the detection and initialisation of a card.
1594  *
1595  * In the case of a resume, "oldcard" will contain the card
1596  * we're trying to reinitialise.
1597  */
1598 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1599         struct mmc_card *oldcard)
1600 {
1601         struct mmc_card *card;
1602         int err;
1603         u32 cid[4];
1604         u32 rocr;
1605
1606         WARN_ON(!host->claimed);
1607
1608         /* Set correct bus mode for MMC before attempting init */
1609         if (!mmc_host_is_spi(host))
1610                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1611
1612         /*
1613          * Since we're changing the OCR value, we seem to
1614          * need to tell some cards to go back to the idle
1615          * state.  We wait 1ms to give cards time to
1616          * respond.
1617          * mmc_go_idle is needed for eMMC that are asleep
1618          */
1619         mmc_go_idle(host);
1620
1621         /* The extra bit indicates that we support high capacity */
1622         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1623         if (err)
1624                 goto err;
1625
1626         /*
1627          * For SPI, enable CRC as appropriate.
1628          */
1629         if (mmc_host_is_spi(host)) {
1630                 err = mmc_spi_set_crc(host, use_spi_crc);
1631                 if (err)
1632                         goto err;
1633         }
1634
1635         /*
1636          * Fetch CID from card.
1637          */
1638         err = mmc_send_cid(host, cid);
1639         if (err)
1640                 goto err;
1641
1642         if (oldcard) {
1643                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1644                         pr_debug("%s: Perhaps the card was replaced\n",
1645                                 mmc_hostname(host));
1646                         err = -ENOENT;
1647                         goto err;
1648                 }
1649
1650                 card = oldcard;
1651         } else {
1652                 /*
1653                  * Allocate card structure.
1654                  */
1655                 card = mmc_alloc_card(host, &mmc_type);
1656                 if (IS_ERR(card)) {
1657                         err = PTR_ERR(card);
1658                         goto err;
1659                 }
1660
1661                 card->ocr = ocr;
1662                 card->type = MMC_TYPE_MMC;
1663                 card->rca = 1;
1664                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1665         }
1666
1667         /*
1668          * Call the optional HC's init_card function to handle quirks.
1669          */
1670         if (host->ops->init_card)
1671                 host->ops->init_card(host, card);
1672
1673         /*
1674          * For native busses:  set card RCA and quit open drain mode.
1675          */
1676         if (!mmc_host_is_spi(host)) {
1677                 err = mmc_set_relative_addr(card);
1678                 if (err)
1679                         goto free_card;
1680
1681                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1682         }
1683
1684         if (!oldcard) {
1685                 /*
1686                  * Fetch CSD from card.
1687                  */
1688                 err = mmc_send_csd(card, card->raw_csd);
1689                 if (err)
1690                         goto free_card;
1691
1692                 err = mmc_decode_csd(card);
1693                 if (err)
1694                         goto free_card;
1695                 err = mmc_decode_cid(card);
1696                 if (err)
1697                         goto free_card;
1698         }
1699
1700         /*
1701          * handling only for cards supporting DSR and hosts requesting
1702          * DSR configuration
1703          */
1704         if (card->csd.dsr_imp && host->dsr_req)
1705                 mmc_set_dsr(host);
1706
1707         /*
1708          * Select card, as all following commands rely on that.
1709          */
1710         if (!mmc_host_is_spi(host)) {
1711                 err = mmc_select_card(card);
1712                 if (err)
1713                         goto free_card;
1714         }
1715
1716         if (!oldcard) {
1717                 /* Read extended CSD. */
1718                 err = mmc_read_ext_csd(card);
1719                 if (err)
1720                         goto free_card;
1721
1722                 /*
1723                  * If doing byte addressing, check if required to do sector
1724                  * addressing.  Handle the case of <2GB cards needing sector
1725                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
1726                  * ocr register has bit 30 set for sector addressing.
1727                  */
1728                 if (rocr & BIT(30))
1729                         mmc_card_set_blockaddr(card);
1730
1731                 /* Erase size depends on CSD and Extended CSD */
1732                 mmc_set_erase_size(card);
1733         }
1734
1735         /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1736         if (card->ext_csd.rev >= 3) {
1737                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1738                                  EXT_CSD_ERASE_GROUP_DEF, 1,
1739                                  card->ext_csd.generic_cmd6_time);
1740
1741                 if (err && err != -EBADMSG)
1742                         goto free_card;
1743
1744                 if (err) {
1745                         /*
1746                          * Just disable enhanced area off & sz
1747                          * will try to enable ERASE_GROUP_DEF
1748                          * during next time reinit
1749                          */
1750                         card->ext_csd.enhanced_area_offset = -EINVAL;
1751                         card->ext_csd.enhanced_area_size = -EINVAL;
1752                 } else {
1753                         card->ext_csd.erase_group_def = 1;
1754                         /*
1755                          * enable ERASE_GRP_DEF successfully.
1756                          * This will affect the erase size, so
1757                          * here need to reset erase size
1758                          */
1759                         mmc_set_erase_size(card);
1760                 }
1761         }
1762
1763         /*
1764          * Ensure eMMC user default partition is enabled
1765          */
1766         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1767                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1768                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1769                                  card->ext_csd.part_config,
1770                                  card->ext_csd.part_time);
1771                 if (err && err != -EBADMSG)
1772                         goto free_card;
1773         }
1774
1775         /*
1776          * Enable power_off_notification byte in the ext_csd register
1777          */
1778         if (card->ext_csd.rev >= 6) {
1779                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1780                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1781                                  EXT_CSD_POWER_ON,
1782                                  card->ext_csd.generic_cmd6_time);
1783                 if (err && err != -EBADMSG)
1784                         goto free_card;
1785
1786                 /*
1787                  * The err can be -EBADMSG or 0,
1788                  * so check for success and update the flag
1789                  */
1790                 if (!err)
1791                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1792         }
1793
1794         /* set erase_arg */
1795         if (mmc_can_discard(card))
1796                 card->erase_arg = MMC_DISCARD_ARG;
1797         else if (mmc_can_trim(card))
1798                 card->erase_arg = MMC_TRIM_ARG;
1799         else
1800                 card->erase_arg = MMC_ERASE_ARG;
1801
1802         /*
1803          * Select timing interface
1804          */
1805         err = mmc_select_timing(card);
1806         if (err)
1807                 goto free_card;
1808
1809         if (mmc_card_hs200(card)) {
1810                 host->doing_init_tune = 1;
1811
1812                 err = mmc_hs200_tuning(card);
1813                 if (!err)
1814                         err = mmc_select_hs400(card);
1815
1816                 host->doing_init_tune = 0;
1817
1818                 if (err)
1819                         goto free_card;
1820
1821         } else if (!mmc_card_hs400es(card)) {
1822                 /* Select the desired bus width optionally */
1823                 err = mmc_select_bus_width(card);
1824                 if (err > 0 && mmc_card_hs(card)) {
1825                         err = mmc_select_hs_ddr(card);
1826                         if (err)
1827                                 goto free_card;
1828                 }
1829         }
1830
1831         /*
1832          * Choose the power class with selected bus interface
1833          */
1834         mmc_select_powerclass(card);
1835
1836         /*
1837          * Enable HPI feature (if supported)
1838          */
1839         if (card->ext_csd.hpi) {
1840                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1841                                 EXT_CSD_HPI_MGMT, 1,
1842                                 card->ext_csd.generic_cmd6_time);
1843                 if (err && err != -EBADMSG)
1844                         goto free_card;
1845                 if (err) {
1846                         pr_warn("%s: Enabling HPI failed\n",
1847                                 mmc_hostname(card->host));
1848                         card->ext_csd.hpi_en = 0;
1849                 } else {
1850                         card->ext_csd.hpi_en = 1;
1851                 }
1852         }
1853
1854         /*
1855          * If cache size is higher than 0, this indicates the existence of cache
1856          * and it can be turned on. Note that some eMMCs from Micron has been
1857          * reported to need ~800 ms timeout, while enabling the cache after
1858          * sudden power failure tests. Let's extend the timeout to a minimum of
1859          * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1860          */
1861         if (card->ext_csd.cache_size > 0) {
1862                 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1863
1864                 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1865                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1866                                 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1867                 if (err && err != -EBADMSG)
1868                         goto free_card;
1869
1870                 /*
1871                  * Only if no error, cache is turned on successfully.
1872                  */
1873                 if (err) {
1874                         pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1875                                 mmc_hostname(card->host), err);
1876                         card->ext_csd.cache_ctrl = 0;
1877                 } else {
1878                         card->ext_csd.cache_ctrl = 1;
1879                 }
1880         }
1881
1882         /*
1883          * Enable Command Queue if supported. Note that Packed Commands cannot
1884          * be used with Command Queue.
1885          */
1886         card->ext_csd.cmdq_en = false;
1887         if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1888                 err = mmc_cmdq_enable(card);
1889                 if (err && err != -EBADMSG)
1890                         goto free_card;
1891                 if (err) {
1892                         pr_warn("%s: Enabling CMDQ failed\n",
1893                                 mmc_hostname(card->host));
1894                         card->ext_csd.cmdq_support = false;
1895                         card->ext_csd.cmdq_depth = 0;
1896                 }
1897         }
1898         /*
1899          * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1900          * disabled for a time, so a flag is needed to indicate to re-enable the
1901          * Command Queue.
1902          */
1903         card->reenable_cmdq = card->ext_csd.cmdq_en;
1904
1905         if (host->cqe_ops && !host->cqe_enabled) {
1906                 err = host->cqe_ops->cqe_enable(host, card);
1907                 if (!err) {
1908                         host->cqe_enabled = true;
1909
1910                         if (card->ext_csd.cmdq_en) {
1911                                 pr_info("%s: Command Queue Engine enabled\n",
1912                                         mmc_hostname(host));
1913                         } else {
1914                                 host->hsq_enabled = true;
1915                                 pr_info("%s: Host Software Queue enabled\n",
1916                                         mmc_hostname(host));
1917                         }
1918                 }
1919         }
1920
1921         if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1922             host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1923                 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1924                         mmc_hostname(host));
1925                 err = -EINVAL;
1926                 goto free_card;
1927         }
1928
1929         if (!oldcard)
1930                 host->card = card;
1931
1932         return 0;
1933
1934 free_card:
1935         if (!oldcard)
1936                 mmc_remove_card(card);
1937 err:
1938         return err;
1939 }
1940
1941 static int mmc_can_sleep(struct mmc_card *card)
1942 {
1943         return card->ext_csd.rev >= 3;
1944 }
1945
1946 static int mmc_sleep_busy_cb(void *cb_data, bool *busy)
1947 {
1948         struct mmc_host *host = cb_data;
1949
1950         *busy = host->ops->card_busy(host);
1951         return 0;
1952 }
1953
1954 static int mmc_sleep(struct mmc_host *host)
1955 {
1956         struct mmc_command cmd = {};
1957         struct mmc_card *card = host->card;
1958         unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1959         bool use_r1b_resp;
1960         int err;
1961
1962         /* Re-tuning can't be done once the card is deselected */
1963         mmc_retune_hold(host);
1964
1965         err = mmc_deselect_cards(host);
1966         if (err)
1967                 goto out_release;
1968
1969         cmd.opcode = MMC_SLEEP_AWAKE;
1970         cmd.arg = card->rca << 16;
1971         cmd.arg |= 1 << 15;
1972         use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
1973
1974         err = mmc_wait_for_cmd(host, &cmd, 0);
1975         if (err)
1976                 goto out_release;
1977
1978         /*
1979          * If the host does not wait while the card signals busy, then we can
1980          * try to poll, but only if the host supports HW polling, as the
1981          * SEND_STATUS cmd is not allowed. If we can't poll, then we simply need
1982          * to wait the sleep/awake timeout.
1983          */
1984         if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
1985                 goto out_release;
1986
1987         if (!host->ops->card_busy) {
1988                 mmc_delay(timeout_ms);
1989                 goto out_release;
1990         }
1991
1992         err = __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_sleep_busy_cb, host);
1993
1994 out_release:
1995         mmc_retune_release(host);
1996         return err;
1997 }
1998
1999 static int mmc_can_poweroff_notify(const struct mmc_card *card)
2000 {
2001         return card &&
2002                 mmc_card_mmc(card) &&
2003                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
2004 }
2005
2006 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
2007 {
2008         unsigned int timeout = card->ext_csd.generic_cmd6_time;
2009         int err;
2010
2011         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
2012         if (notify_type == EXT_CSD_POWER_OFF_LONG)
2013                 timeout = card->ext_csd.power_off_longtime;
2014
2015         err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
2016                         EXT_CSD_POWER_OFF_NOTIFICATION,
2017                         notify_type, timeout, 0, false, false, MMC_CMD_RETRIES);
2018         if (err)
2019                 pr_err("%s: Power Off Notification timed out, %u\n",
2020                        mmc_hostname(card->host), timeout);
2021
2022         /* Disable the power off notification after the switch operation. */
2023         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
2024
2025         return err;
2026 }
2027
2028 /*
2029  * Host is being removed. Free up the current card.
2030  */
2031 static void mmc_remove(struct mmc_host *host)
2032 {
2033         mmc_remove_card(host->card);
2034         host->card = NULL;
2035 }
2036
2037 /*
2038  * Card detection - card is alive.
2039  */
2040 static int mmc_alive(struct mmc_host *host)
2041 {
2042         return mmc_send_status(host->card, NULL);
2043 }
2044
2045 /*
2046  * Card detection callback from host.
2047  */
2048 static void mmc_detect(struct mmc_host *host)
2049 {
2050         int err;
2051
2052         mmc_get_card(host->card, NULL);
2053
2054         /*
2055          * Just check if our card has been removed.
2056          */
2057         err = _mmc_detect_card_removed(host);
2058
2059         mmc_put_card(host->card, NULL);
2060
2061         if (err) {
2062                 mmc_remove(host);
2063
2064                 mmc_claim_host(host);
2065                 mmc_detach_bus(host);
2066                 mmc_power_off(host);
2067                 mmc_release_host(host);
2068         }
2069 }
2070
2071 static bool _mmc_cache_enabled(struct mmc_host *host)
2072 {
2073         return host->card->ext_csd.cache_size > 0 &&
2074                host->card->ext_csd.cache_ctrl & 1;
2075 }
2076
2077 /*
2078  * Flush the internal cache of the eMMC to non-volatile storage.
2079  */
2080 static int _mmc_flush_cache(struct mmc_host *host)
2081 {
2082         int err = 0;
2083
2084         if (_mmc_cache_enabled(host)) {
2085                 err = mmc_switch(host->card, EXT_CSD_CMD_SET_NORMAL,
2086                                  EXT_CSD_FLUSH_CACHE, 1,
2087                                  CACHE_FLUSH_TIMEOUT_MS);
2088                 if (err)
2089                         pr_err("%s: cache flush error %d\n",
2090                                mmc_hostname(host), err);
2091         }
2092
2093         return err;
2094 }
2095
2096 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2097 {
2098         int err = 0;
2099         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2100                                         EXT_CSD_POWER_OFF_LONG;
2101
2102         mmc_claim_host(host);
2103
2104         if (mmc_card_suspended(host->card))
2105                 goto out;
2106
2107         err = _mmc_flush_cache(host);
2108         if (err)
2109                 goto out;
2110
2111         if (mmc_can_poweroff_notify(host->card) &&
2112             ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend ||
2113              (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND)))
2114                 err = mmc_poweroff_notify(host->card, notify_type);
2115         else if (mmc_can_sleep(host->card))
2116                 err = mmc_sleep(host);
2117         else if (!mmc_host_is_spi(host))
2118                 err = mmc_deselect_cards(host);
2119
2120         if (!err) {
2121                 mmc_power_off(host);
2122                 mmc_card_set_suspended(host->card);
2123         }
2124 out:
2125         mmc_release_host(host);
2126         return err;
2127 }
2128
2129 /*
2130  * Suspend callback
2131  */
2132 static int mmc_suspend(struct mmc_host *host)
2133 {
2134         int err;
2135
2136         err = _mmc_suspend(host, true);
2137         if (!err) {
2138                 pm_runtime_disable(&host->card->dev);
2139                 pm_runtime_set_suspended(&host->card->dev);
2140         }
2141
2142         return err;
2143 }
2144
2145 /*
2146  * This function tries to determine if the same card is still present
2147  * and, if so, restore all state to it.
2148  */
2149 static int _mmc_resume(struct mmc_host *host)
2150 {
2151         int err = 0;
2152
2153         mmc_claim_host(host);
2154
2155         if (!mmc_card_suspended(host->card))
2156                 goto out;
2157
2158         mmc_power_up(host, host->card->ocr);
2159         err = mmc_init_card(host, host->card->ocr, host->card);
2160         mmc_card_clr_suspended(host->card);
2161
2162 out:
2163         mmc_release_host(host);
2164         return err;
2165 }
2166
2167 /*
2168  * Shutdown callback
2169  */
2170 static int mmc_shutdown(struct mmc_host *host)
2171 {
2172         int err = 0;
2173
2174         /*
2175          * In a specific case for poweroff notify, we need to resume the card
2176          * before we can shutdown it properly.
2177          */
2178         if (mmc_can_poweroff_notify(host->card) &&
2179                 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2180                 err = _mmc_resume(host);
2181
2182         if (!err)
2183                 err = _mmc_suspend(host, false);
2184
2185         return err;
2186 }
2187
2188 /*
2189  * Callback for resume.
2190  */
2191 static int mmc_resume(struct mmc_host *host)
2192 {
2193         pm_runtime_enable(&host->card->dev);
2194         return 0;
2195 }
2196
2197 /*
2198  * Callback for runtime_suspend.
2199  */
2200 static int mmc_runtime_suspend(struct mmc_host *host)
2201 {
2202         int err;
2203
2204         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2205                 return 0;
2206
2207         err = _mmc_suspend(host, true);
2208         if (err)
2209                 pr_err("%s: error %d doing aggressive suspend\n",
2210                         mmc_hostname(host), err);
2211
2212         return err;
2213 }
2214
2215 /*
2216  * Callback for runtime_resume.
2217  */
2218 static int mmc_runtime_resume(struct mmc_host *host)
2219 {
2220         int err;
2221
2222         err = _mmc_resume(host);
2223         if (err && err != -ENOMEDIUM)
2224                 pr_err("%s: error %d doing runtime resume\n",
2225                         mmc_hostname(host), err);
2226
2227         return 0;
2228 }
2229
2230 static int mmc_can_reset(struct mmc_card *card)
2231 {
2232         u8 rst_n_function;
2233
2234         rst_n_function = card->ext_csd.rst_n_function;
2235         if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2236                 return 0;
2237         return 1;
2238 }
2239
2240 static int _mmc_hw_reset(struct mmc_host *host)
2241 {
2242         struct mmc_card *card = host->card;
2243
2244         /*
2245          * In the case of recovery, we can't expect flushing the cache to work
2246          * always, but we have a go and ignore errors.
2247          */
2248         _mmc_flush_cache(host);
2249
2250         if ((host->caps & MMC_CAP_HW_RESET) && host->ops->card_hw_reset &&
2251              mmc_can_reset(card)) {
2252                 /* If the card accept RST_n signal, send it. */
2253                 mmc_set_clock(host, host->f_init);
2254                 host->ops->card_hw_reset(host);
2255                 /* Set initial state and call mmc_set_ios */
2256                 mmc_set_initial_state(host);
2257         } else {
2258                 /* Do a brute force power cycle */
2259                 mmc_power_cycle(host, card->ocr);
2260                 mmc_pwrseq_reset(host);
2261         }
2262         return mmc_init_card(host, card->ocr, card);
2263 }
2264
2265 static const struct mmc_bus_ops mmc_ops = {
2266         .remove = mmc_remove,
2267         .detect = mmc_detect,
2268         .suspend = mmc_suspend,
2269         .resume = mmc_resume,
2270         .runtime_suspend = mmc_runtime_suspend,
2271         .runtime_resume = mmc_runtime_resume,
2272         .alive = mmc_alive,
2273         .shutdown = mmc_shutdown,
2274         .hw_reset = _mmc_hw_reset,
2275         .cache_enabled = _mmc_cache_enabled,
2276         .flush_cache = _mmc_flush_cache,
2277 };
2278
2279 /*
2280  * Starting point for MMC card init.
2281  */
2282 int mmc_attach_mmc(struct mmc_host *host)
2283 {
2284         int err;
2285         u32 ocr, rocr;
2286
2287         WARN_ON(!host->claimed);
2288
2289         /* Set correct bus mode for MMC before attempting attach */
2290         if (!mmc_host_is_spi(host))
2291                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2292
2293         err = mmc_send_op_cond(host, 0, &ocr);
2294         if (err)
2295                 return err;
2296
2297         mmc_attach_bus(host, &mmc_ops);
2298         if (host->ocr_avail_mmc)
2299                 host->ocr_avail = host->ocr_avail_mmc;
2300
2301         /*
2302          * We need to get OCR a different way for SPI.
2303          */
2304         if (mmc_host_is_spi(host)) {
2305                 err = mmc_spi_read_ocr(host, 1, &ocr);
2306                 if (err)
2307                         goto err;
2308         }
2309
2310         rocr = mmc_select_voltage(host, ocr);
2311
2312         /*
2313          * Can we support the voltage of the card?
2314          */
2315         if (!rocr) {
2316                 err = -EINVAL;
2317                 goto err;
2318         }
2319
2320         /*
2321          * Detect and init the card.
2322          */
2323         err = mmc_init_card(host, rocr, NULL);
2324         if (err)
2325                 goto err;
2326
2327         mmc_release_host(host);
2328         err = mmc_add_card(host->card);
2329         if (err)
2330                 goto remove_card;
2331
2332         mmc_claim_host(host);
2333         return 0;
2334
2335 remove_card:
2336         mmc_remove_card(host->card);
2337         mmc_claim_host(host);
2338         host->card = NULL;
2339 err:
2340         mmc_detach_bus(host);
2341
2342         pr_err("%s: error %d whilst initialising MMC card\n",
2343                 mmc_hostname(host), err);
2344
2345         return err;
2346 }