drivers/mmc/core/mmc.c

   1 /*
   2  *  linux/drivers/mmc/core/mmc.c
   3  *
   4  *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
   5  *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
   6  *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/slab.h>
  15 #include <linux/stat.h>
  16
  17 #include <linux/mmc/host.h>
  18 #include <linux/mmc/card.h>
  19 #include <linux/mmc/mmc.h>
  20
  21 #include "core.h"
  22 #include "bus.h"
  23 #include "mmc_ops.h"
  24 #include "sd_ops.h"
  25
  26 static const unsigned int tran_exp[] = {
  27         10000,          100000,         1000000,        10000000,
  28         0,              0,              0,              0
  29 };
  30
  31 static const unsigned char tran_mant[] = {
  32         0,      10,     12,     13,     15,     20,     25,     30,
  33         35,     40,     45,     50,     55,     60,     70,     80,
  34 };
  35
  36 static const unsigned int tacc_exp[] = {
  37         1,      10,     100,    1000,   10000,  100000, 1000000, 10000000,
  38 };
  39
  40 static const unsigned int tacc_mant[] = {
  41         0,      10,     12,     13,     15,     20,     25,     30,
  42         35,     40,     45,     50,     55,     60,     70,     80,
  43 };
  44
  45 #define UNSTUFF_BITS(resp,start,size)                                   \
  46         ({                                                              \
  47                 const int __size = size;                                \
  48                 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
  49                 const int __off = 3 - ((start) / 32);                   \
  50                 const int __shft = (start) & 31;                        \
  51                 u32 __res;                                              \
  52                                                                         \
  53                 __res = resp[__off] >> __shft;                          \
  54                 if (__size + __shft > 32)                               \
  55                         __res |= resp[__off-1] << ((32 - __shft) % 32); \
  56                 __res & __mask;                                         \
  57         })
  58
  59 /*
  60  * Given the decoded CSD structure, decode the raw CID to our CID structure.
  61  */
  62 static int mmc_decode_cid(struct mmc_card *card)
  63 {
  64         u32 *resp = card->raw_cid;
  65
  66         /*
  67          * The selection of the format here is based upon published
  68          * specs from sandisk and from what people have reported.
  69          */
  70         switch (card->csd.mmca_vsn) {
  71         case 0: /* MMC v1.0 - v1.2 */
  72         case 1: /* MMC v1.4 */
  73                 card->cid.manfid        = UNSTUFF_BITS(resp, 104, 24);
  74                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  75                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  76                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  77                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  78                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  79                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  80                 card->cid.prod_name[6]  = UNSTUFF_BITS(resp, 48, 8);
  81                 card->cid.hwrev         = UNSTUFF_BITS(resp, 44, 4);
  82                 card->cid.fwrev         = UNSTUFF_BITS(resp, 40, 4);
  83                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 24);
  84                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
  85                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
  86                 break;
  87
  88         case 2: /* MMC v2.0 - v2.2 */
  89         case 3: /* MMC v3.1 - v3.3 */
  90         case 4: /* MMC v4 */
  91                 card->cid.manfid        = UNSTUFF_BITS(resp, 120, 8);
  92                 card->cid.oemid         = UNSTUFF_BITS(resp, 104, 16);
  93                 card->cid.prod_name[0]  = UNSTUFF_BITS(resp, 96, 8);
  94                 card->cid.prod_name[1]  = UNSTUFF_BITS(resp, 88, 8);
  95                 card->cid.prod_name[2]  = UNSTUFF_BITS(resp, 80, 8);
  96                 card->cid.prod_name[3]  = UNSTUFF_BITS(resp, 72, 8);
  97                 card->cid.prod_name[4]  = UNSTUFF_BITS(resp, 64, 8);
  98                 card->cid.prod_name[5]  = UNSTUFF_BITS(resp, 56, 8);
  99                 card->cid.prv           = UNSTUFF_BITS(resp, 48, 8);
 100                 card->cid.serial        = UNSTUFF_BITS(resp, 16, 32);
 101                 card->cid.month         = UNSTUFF_BITS(resp, 12, 4);
 102                 card->cid.year          = UNSTUFF_BITS(resp, 8, 4) + 1997;
 103                 break;
 104
 105         default:
 106                 pr_err("%s: card has unknown MMCA version %d\n",
 107                         mmc_hostname(card->host), card->csd.mmca_vsn);
 108                 return -EINVAL;
 109         }
 110
 111         return 0;
 112 }
 113
 114 static void mmc_set_erase_size(struct mmc_card *card)
 115 {
 116         if (card->ext_csd.erase_group_def & 1)
 117                 card->erase_size = card->ext_csd.hc_erase_size;
 118         else
 119                 card->erase_size = card->csd.erase_size;
 120
 121         mmc_init_erase(card);
 122 }
 123
 124 /*
 125  * Given a 128-bit response, decode to our card CSD structure.
 126  */
 127 static int mmc_decode_csd(struct mmc_card *card)
 128 {
 129         struct mmc_csd *csd = &card->csd;
 130         unsigned int e, m, a, b;
 131         u32 *resp = card->raw_csd;
 132
 133         /*
 134          * We only understand CSD structure v1.1 and v1.2.
 135          * v1.2 has extra information in bits 15, 11 and 10.
 136          * We also support eMMC v4.4 & v4.41.
 137          */
 138         csd->structure = UNSTUFF_BITS(resp, 126, 2);
 139         if (csd->structure == 0) {
 140                 pr_err("%s: unrecognised CSD structure version %d\n",
 141                         mmc_hostname(card->host), csd->structure);
 142                 return -EINVAL;
 143         }
 144
 145         csd->mmca_vsn    = UNSTUFF_BITS(resp, 122, 4);
 146         m = UNSTUFF_BITS(resp, 115, 4);
 147         e = UNSTUFF_BITS(resp, 112, 3);
 148         csd->tacc_ns     = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
 149         csd->tacc_clks   = UNSTUFF_BITS(resp, 104, 8) * 100;
 150
 151         m = UNSTUFF_BITS(resp, 99, 4);
 152         e = UNSTUFF_BITS(resp, 96, 3);
 153         csd->max_dtr      = tran_exp[e] * tran_mant[m];
 154         csd->cmdclass     = UNSTUFF_BITS(resp, 84, 12);
 155
 156         e = UNSTUFF_BITS(resp, 47, 3);
 157         m = UNSTUFF_BITS(resp, 62, 12);
 158         csd->capacity     = (1 + m) << (e + 2);
 159
 160         csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
 161         csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 162         csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 163         csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
 164         csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 165         csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 166         csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 167
 168         if (csd->write_blkbits >= 9) {
 169                 a = UNSTUFF_BITS(resp, 42, 5);
 170                 b = UNSTUFF_BITS(resp, 37, 5);
 171                 csd->erase_size = (a + 1) * (b + 1);
 172                 csd->erase_size <<= csd->write_blkbits - 9;
 173         }
 174
 175         return 0;
 176 }
 177
 178 /*
 179  * Read extended CSD.
 180  */
 181 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
 182 {
 183         int err;
 184         u8 *ext_csd;
 185
 186         BUG_ON(!card);
 187         BUG_ON(!new_ext_csd);
 188
 189         *new_ext_csd = NULL;
 190
 191         if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
 192                 return 0;
 193
 194         /*
 195          * As the ext_csd is so large and mostly unused, we don't store the
 196          * raw block in mmc_card.
 197          */
 198         ext_csd = kmalloc(512, GFP_KERNEL);
 199         if (!ext_csd) {
 200                 pr_err("%s: could not allocate a buffer to "
 201                         "receive the ext_csd.\n", mmc_hostname(card->host));
 202                 return -ENOMEM;
 203         }
 204
 205         err = mmc_send_ext_csd(card, ext_csd);
 206         if (err) {
 207                 kfree(ext_csd);
 208                 *new_ext_csd = NULL;
 209
 210                 /* If the host or the card can't do the switch,
 211                  * fail more gracefully. */
 212                 if ((err != -EINVAL)
 213                  && (err != -ENOSYS)
 214                  && (err != -EFAULT))
 215                         return err;
 216
 217                 /*
 218                  * High capacity cards should have this "magic" size
 219                  * stored in their CSD.
 220                  */
 221                 if (card->csd.capacity == (4096 * 512)) {
 222                         pr_err("%s: unable to read EXT_CSD "
 223                                 "on a possible high capacity card. "
 224                                 "Card will be ignored.\n",
 225                                 mmc_hostname(card->host));
 226                 } else {
 227                         pr_warning("%s: unable to read "
 228                                 "EXT_CSD, performance might "
 229                                 "suffer.\n",
 230                                 mmc_hostname(card->host));
 231                         err = 0;
 232                 }
 233         } else
 234                 *new_ext_csd = ext_csd;
 235
 236         return err;
 237 }
 238
 239 static void mmc_select_card_type(struct mmc_card *card)
 240 {
 241         struct mmc_host *host = card->host;
 242         u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
 243         u32 caps = host->caps, caps2 = host->caps2;
 244         unsigned int hs_max_dtr = 0;
 245
 246         if (card_type & EXT_CSD_CARD_TYPE_26)
 247                 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
 248
 249         if (caps & MMC_CAP_MMC_HIGHSPEED &&
 250                         card_type & EXT_CSD_CARD_TYPE_52)
 251                 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
 252
 253         if ((caps & MMC_CAP_1_8V_DDR &&
 254                         card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
 255             (caps & MMC_CAP_1_2V_DDR &&
 256                         card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
 257                 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
 258
 259         if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
 260                         card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
 261             (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
 262                         card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
 263                 hs_max_dtr = MMC_HS200_MAX_DTR;
 264
 265         card->ext_csd.hs_max_dtr = hs_max_dtr;
 266         card->ext_csd.card_type = card_type;
 267 }
 268
 269 /*
 270  * Decode extended CSD.
 271  */
 272 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 273 {
 274         int err = 0, idx;
 275         unsigned int part_size;
 276         u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
 277
 278         BUG_ON(!card);
 279
 280         if (!ext_csd)
 281                 return 0;
 282
 283         /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 284         card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
 285         if (card->csd.structure == 3) {
 286                 if (card->ext_csd.raw_ext_csd_structure > 2) {
 287                         pr_err("%s: unrecognised EXT_CSD structure "
 288                                 "version %d\n", mmc_hostname(card->host),
 289                                         card->ext_csd.raw_ext_csd_structure);
 290                         err = -EINVAL;
 291                         goto out;
 292                 }
 293         }
 294
 295         card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 296         if (card->ext_csd.rev > 7) {
 297                 pr_err("%s: unrecognised EXT_CSD revision %d\n",
 298                         mmc_hostname(card->host), card->ext_csd.rev);
 299                 err = -EINVAL;
 300                 goto out;
 301         }
 302
 303         card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
 304         card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
 305         card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
 306         card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
 307         if (card->ext_csd.rev >= 2) {
 308                 card->ext_csd.sectors =
 309                         ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
 310                         ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
 311                         ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
 312                         ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
 313
 314                 /* Cards with density > 2GiB are sector addressed */
 315                 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
 316                         mmc_card_set_blockaddr(card);
 317         }
 318
 319         card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 320         mmc_select_card_type(card);
 321
 322         card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
 323         card->ext_csd.raw_erase_timeout_mult =
 324                 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 325         card->ext_csd.raw_hc_erase_grp_size =
 326                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 327         if (card->ext_csd.rev >= 3) {
 328                 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
 329                 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
 330
 331                 /* EXT_CSD value is in units of 10ms, but we store in ms */
 332                 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 333
 334                 /* Sleep / awake timeout in 100ns units */
 335                 if (sa_shift > 0 && sa_shift <= 0x17)
 336                         card->ext_csd.sa_timeout =
 337                                         1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
 338                 card->ext_csd.erase_group_def =
 339                         ext_csd[EXT_CSD_ERASE_GROUP_DEF];
 340                 card->ext_csd.hc_erase_timeout = 300 *
 341                         ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 342                 card->ext_csd.hc_erase_size =
 343                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
 344
 345                 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
 346
 347                 /*
 348                  * There are two boot regions of equal size, defined in
 349                  * multiples of 128K.
 350                  */
 351                 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
 352                         for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
 353                                 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 354                                 mmc_part_add(card, part_size,
 355                                         EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
 356                                         "boot%d", idx, true,
 357                                         MMC_BLK_DATA_AREA_BOOT);
 358                         }
 359                 }
 360         }
 361
 362         card->ext_csd.raw_hc_erase_gap_size =
 363                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 364         card->ext_csd.raw_sec_trim_mult =
 365                 ext_csd[EXT_CSD_SEC_TRIM_MULT];
 366         card->ext_csd.raw_sec_erase_mult =
 367                 ext_csd[EXT_CSD_SEC_ERASE_MULT];
 368         card->ext_csd.raw_sec_feature_support =
 369                 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 370         card->ext_csd.raw_trim_mult =
 371                 ext_csd[EXT_CSD_TRIM_MULT];
 372         card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 373         if (card->ext_csd.rev >= 4) {
 374                 /*
 375                  * Enhanced area feature support -- check whether the eMMC
 376                  * card has the Enhanced area enabled.  If so, export enhanced
 377                  * area offset and size to user by adding sysfs interface.
 378                  */
 379                 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
 380                     (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
 381                         hc_erase_grp_sz =
 382                                 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 383                         hc_wp_grp_sz =
 384                                 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 385
 386                         card->ext_csd.enhanced_area_en = 1;
 387                         /*
 388                          * calculate the enhanced data area offset, in bytes
 389                          */
 390                         card->ext_csd.enhanced_area_offset =
 391                                 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
 392                                 (ext_csd[137] << 8) + ext_csd[136];
 393                         if (mmc_card_blockaddr(card))
 394                                 card->ext_csd.enhanced_area_offset <<= 9;
 395                         /*
 396                          * calculate the enhanced data area size, in kilobytes
 397                          */
 398                         card->ext_csd.enhanced_area_size =
 399                                 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
 400                                 ext_csd[140];
 401                         card->ext_csd.enhanced_area_size *=
 402                                 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
 403                         card->ext_csd.enhanced_area_size <<= 9;
 404                 } else {
 405                         /*
 406                          * If the enhanced area is not enabled, disable these
 407                          * device attributes.
 408                          */
 409                         card->ext_csd.enhanced_area_offset = -EINVAL;
 410                         card->ext_csd.enhanced_area_size = -EINVAL;
 411                 }
 412
 413                 /*
 414                  * General purpose partition feature support --
 415                  * If ext_csd has the size of general purpose partitions,
 416                  * set size, part_cfg, partition name in mmc_part.
 417                  */
 418                 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
 419                         EXT_CSD_PART_SUPPORT_PART_EN) {
 420                         if (card->ext_csd.enhanced_area_en != 1) {
 421                                 hc_erase_grp_sz =
 422                                         ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
 423                                 hc_wp_grp_sz =
 424                                         ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
 425
 426                                 card->ext_csd.enhanced_area_en = 1;
 427                         }
 428
 429                         for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
 430                                 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
 431                                 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
 432                                 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
 433                                         continue;
 434                                 part_size =
 435                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
 436                                         << 16) +
 437                                 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
 438                                         << 8) +
 439                                 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
 440                                 part_size *= (size_t)(hc_erase_grp_sz *
 441                                         hc_wp_grp_sz);
 442                                 mmc_part_add(card, part_size << 19,
 443                                         EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
 444                                         "gp%d", idx, false,
 445                                         MMC_BLK_DATA_AREA_GP);
 446                         }
 447                 }
 448                 card->ext_csd.sec_trim_mult =
 449                         ext_csd[EXT_CSD_SEC_TRIM_MULT];
 450                 card->ext_csd.sec_erase_mult =
 451                         ext_csd[EXT_CSD_SEC_ERASE_MULT];
 452                 card->ext_csd.sec_feature_support =
 453                         ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 454                 card->ext_csd.trim_timeout = 300 *
 455                         ext_csd[EXT_CSD_TRIM_MULT];
 456
 457                 /*
 458                  * Note that the call to mmc_part_add above defaults to read
 459                  * only. If this default assumption is changed, the call must
 460                  * take into account the value of boot_locked below.
 461                  */
 462                 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
 463                 card->ext_csd.boot_ro_lockable = true;
 464
 465                 /* Save power class values */
 466                 card->ext_csd.raw_pwr_cl_52_195 =
 467                         ext_csd[EXT_CSD_PWR_CL_52_195];
 468                 card->ext_csd.raw_pwr_cl_26_195 =
 469                         ext_csd[EXT_CSD_PWR_CL_26_195];
 470                 card->ext_csd.raw_pwr_cl_52_360 =
 471                         ext_csd[EXT_CSD_PWR_CL_52_360];
 472                 card->ext_csd.raw_pwr_cl_26_360 =
 473                         ext_csd[EXT_CSD_PWR_CL_26_360];
 474                 card->ext_csd.raw_pwr_cl_200_195 =
 475                         ext_csd[EXT_CSD_PWR_CL_200_195];
 476                 card->ext_csd.raw_pwr_cl_200_360 =
 477                         ext_csd[EXT_CSD_PWR_CL_200_360];
 478                 card->ext_csd.raw_pwr_cl_ddr_52_195 =
 479                         ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
 480                 card->ext_csd.raw_pwr_cl_ddr_52_360 =
 481                         ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
 482         }
 483
 484         if (card->ext_csd.rev >= 5) {
 485                 /* Adjust production date as per JEDEC JESD84-B451 */
 486                 if (card->cid.year < 2010)
 487                         card->cid.year += 16;
 488
 489                 /* check whether the eMMC card supports BKOPS */
 490                 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 491                         card->ext_csd.bkops = 1;
 492                         card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
 493                         card->ext_csd.raw_bkops_status =
 494                                 ext_csd[EXT_CSD_BKOPS_STATUS];
 495                         if (!card->ext_csd.bkops_en)
 496                                 pr_info("%s: BKOPS_EN bit is not set\n",
 497                                         mmc_hostname(card->host));
 498                 }
 499
 500                 /* check whether the eMMC card supports HPI */
 501                 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
 502                         card->ext_csd.hpi = 1;
 503                         if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
 504                                 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
 505                         else
 506                                 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
 507                         /*
 508                          * Indicate the maximum timeout to close
 509                          * a command interrupted by HPI
 510                          */
 511                         card->ext_csd.out_of_int_time =
 512                                 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
 513                 }
 514
 515                 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
 516                 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
 517
 518                 /*
 519                  * RPMB regions are defined in multiples of 128K.
 520                  */
 521                 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
 522                 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
 523                         mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
 524                                 EXT_CSD_PART_CONFIG_ACC_RPMB,
 525                                 "rpmb", 0, false,
 526                                 MMC_BLK_DATA_AREA_RPMB);
 527                 }
 528         }
 529
 530         card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
 531         if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 532                 card->erased_byte = 0xFF;
 533         else
 534                 card->erased_byte = 0x0;
 535
 536         /* eMMC v4.5 or later */
 537         if (card->ext_csd.rev >= 6) {
 538                 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
 539
 540                 card->ext_csd.generic_cmd6_time = 10 *
 541                         ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
 542                 card->ext_csd.power_off_longtime = 10 *
 543                         ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
 544
 545                 card->ext_csd.cache_size =
 546                         ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
 547                         ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
 548                         ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
 549                         ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
 550
 551                 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
 552                         card->ext_csd.data_sector_size = 4096;
 553                 else
 554                         card->ext_csd.data_sector_size = 512;
 555
 556                 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
 557                     (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
 558                         card->ext_csd.data_tag_unit_size =
 559                         ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
 560                         (card->ext_csd.data_sector_size);
 561                 } else {
 562                         card->ext_csd.data_tag_unit_size = 0;
 563                 }
 564
 565                 card->ext_csd.max_packed_writes =
 566                         ext_csd[EXT_CSD_MAX_PACKED_WRITES];
 567                 card->ext_csd.max_packed_reads =
 568                         ext_csd[EXT_CSD_MAX_PACKED_READS];
 569         } else {
 570                 card->ext_csd.data_sector_size = 512;
 571         }
 572
 573 out:
 574         return err;
 575 }
 576
 577 static inline void mmc_free_ext_csd(u8 *ext_csd)
 578 {
 579         kfree(ext_csd);
 580 }
 581
 582
 583 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 584 {
 585         u8 *bw_ext_csd;
 586         int err;
 587
 588         if (bus_width == MMC_BUS_WIDTH_1)
 589                 return 0;
 590
 591         err = mmc_get_ext_csd(card, &bw_ext_csd);
 592
 593         if (err || bw_ext_csd == NULL) {
 594                 err = -EINVAL;
 595                 goto out;
 596         }
 597
 598         /* only compare read only fields */
 599         err = !((card->ext_csd.raw_partition_support ==
 600                         bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
 601                 (card->ext_csd.raw_erased_mem_count ==
 602                         bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
 603                 (card->ext_csd.rev ==
 604                         bw_ext_csd[EXT_CSD_REV]) &&
 605                 (card->ext_csd.raw_ext_csd_structure ==
 606                         bw_ext_csd[EXT_CSD_STRUCTURE]) &&
 607                 (card->ext_csd.raw_card_type ==
 608                         bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
 609                 (card->ext_csd.raw_s_a_timeout ==
 610                         bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
 611                 (card->ext_csd.raw_hc_erase_gap_size ==
 612                         bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
 613                 (card->ext_csd.raw_erase_timeout_mult ==
 614                         bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
 615                 (card->ext_csd.raw_hc_erase_grp_size ==
 616                         bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
 617                 (card->ext_csd.raw_sec_trim_mult ==
 618                         bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
 619                 (card->ext_csd.raw_sec_erase_mult ==
 620                         bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
 621                 (card->ext_csd.raw_sec_feature_support ==
 622                         bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
 623                 (card->ext_csd.raw_trim_mult ==
 624                         bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
 625                 (card->ext_csd.raw_sectors[0] ==
 626                         bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
 627                 (card->ext_csd.raw_sectors[1] ==
 628                         bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
 629                 (card->ext_csd.raw_sectors[2] ==
 630                         bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
 631                 (card->ext_csd.raw_sectors[3] ==
 632                         bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
 633                 (card->ext_csd.raw_pwr_cl_52_195 ==
 634                         bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
 635                 (card->ext_csd.raw_pwr_cl_26_195 ==
 636                         bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
 637                 (card->ext_csd.raw_pwr_cl_52_360 ==
 638                         bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
 639                 (card->ext_csd.raw_pwr_cl_26_360 ==
 640                         bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
 641                 (card->ext_csd.raw_pwr_cl_200_195 ==
 642                         bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
 643                 (card->ext_csd.raw_pwr_cl_200_360 ==
 644                         bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
 645                 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
 646                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
 647                 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
 648                         bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]));
 649         if (err)
 650                 err = -EINVAL;
 651
 652 out:
 653         mmc_free_ext_csd(bw_ext_csd);
 654         return err;
 655 }
 656
 657 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 658         card->raw_cid[2], card->raw_cid[3]);
 659 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
 660         card->raw_csd[2], card->raw_csd[3]);
 661 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
 662 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
 663 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
 664 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
 665 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
 666 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 667 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 668 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 669 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
 670 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 671 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
 672                 card->ext_csd.enhanced_area_offset);
 673 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 674 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 675 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 676
 677 static struct attribute *mmc_std_attrs[] = {
 678         &dev_attr_cid.attr,
 679         &dev_attr_csd.attr,
 680         &dev_attr_date.attr,
 681         &dev_attr_erase_size.attr,
 682         &dev_attr_preferred_erase_size.attr,
 683         &dev_attr_fwrev.attr,
 684         &dev_attr_hwrev.attr,
 685         &dev_attr_manfid.attr,
 686         &dev_attr_name.attr,
 687         &dev_attr_oemid.attr,
 688         &dev_attr_prv.attr,
 689         &dev_attr_serial.attr,
 690         &dev_attr_enhanced_area_offset.attr,
 691         &dev_attr_enhanced_area_size.attr,
 692         &dev_attr_raw_rpmb_size_mult.attr,
 693         &dev_attr_rel_sectors.attr,
 694         NULL,
 695 };
 696
 697 static struct attribute_group mmc_std_attr_group = {
 698         .attrs = mmc_std_attrs,
 699 };
 700
 701 static const struct attribute_group *mmc_attr_groups[] = {
 702         &mmc_std_attr_group,
 703         NULL,
 704 };
 705
 706 static struct device_type mmc_type = {
 707         .groups = mmc_attr_groups,
 708 };
 709
 710 /*
 711  * Select the PowerClass for the current bus width
 712  * If power class is defined for 4/8 bit bus in the
 713  * extended CSD register, select it by executing the
 714  * mmc_switch command.
 715  */
 716 static int mmc_select_powerclass(struct mmc_card *card,
 717                 unsigned int bus_width)
 718 {
 719         int err = 0;
 720         unsigned int pwrclass_val = 0;
 721         struct mmc_host *host;
 722
 723         BUG_ON(!card);
 724
 725         host = card->host;
 726         BUG_ON(!host);
 727
 728         /* Power class selection is supported for versions >= 4.0 */
 729         if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
 730                 return 0;
 731
 732         /* Power class values are defined only for 4/8 bit bus */
 733         if (bus_width == EXT_CSD_BUS_WIDTH_1)
 734                 return 0;
 735
 736         switch (1 << host->ios.vdd) {
 737         case MMC_VDD_165_195:
 738                 if (host->ios.clock <= 26000000)
 739                         pwrclass_val = card->ext_csd.raw_pwr_cl_26_195;
 740                 else if (host->ios.clock <= 52000000)
 741                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 742                                 card->ext_csd.raw_pwr_cl_52_195 :
 743                                 card->ext_csd.raw_pwr_cl_ddr_52_195;
 744                 else if (host->ios.clock <= 200000000)
 745                         pwrclass_val = card->ext_csd.raw_pwr_cl_200_195;
 746                 break;
 747         case MMC_VDD_27_28:
 748         case MMC_VDD_28_29:
 749         case MMC_VDD_29_30:
 750         case MMC_VDD_30_31:
 751         case MMC_VDD_31_32:
 752         case MMC_VDD_32_33:
 753         case MMC_VDD_33_34:
 754         case MMC_VDD_34_35:
 755         case MMC_VDD_35_36:
 756                 if (host->ios.clock <= 26000000)
 757                         pwrclass_val = card->ext_csd.raw_pwr_cl_26_360;
 758                 else if (host->ios.clock <= 52000000)
 759                         pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
 760                                 card->ext_csd.raw_pwr_cl_52_360 :
 761                                 card->ext_csd.raw_pwr_cl_ddr_52_360;
 762                 else if (host->ios.clock <= 200000000)
 763                         pwrclass_val = card->ext_csd.raw_pwr_cl_200_360;
 764                 break;
 765         default:
 766                 pr_warning("%s: Voltage range not supported "
 767                            "for power class.\n", mmc_hostname(host));
 768                 return -EINVAL;
 769         }
 770
 771         if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
 772                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
 773                                 EXT_CSD_PWR_CL_8BIT_SHIFT;
 774         else
 775                 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
 776                                 EXT_CSD_PWR_CL_4BIT_SHIFT;
 777
 778         /* If the power class is different from the default value */
 779         if (pwrclass_val > 0) {
 780                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 781                                  EXT_CSD_POWER_CLASS,
 782                                  pwrclass_val,
 783                                  card->ext_csd.generic_cmd6_time);
 784         }
 785
 786         return err;
 787 }
 788
 789 /*
 790  * Selects the desired buswidth and switch to the HS200 mode
 791  * if bus width set without error
 792  */
 793 static int mmc_select_hs200(struct mmc_card *card)
 794 {
 795         int idx, err = -EINVAL;
 796         struct mmc_host *host;
 797         static unsigned ext_csd_bits[] = {
 798                 EXT_CSD_BUS_WIDTH_4,
 799                 EXT_CSD_BUS_WIDTH_8,
 800         };
 801         static unsigned bus_widths[] = {
 802                 MMC_BUS_WIDTH_4,
 803                 MMC_BUS_WIDTH_8,
 804         };
 805
 806         BUG_ON(!card);
 807
 808         host = card->host;
 809
 810         if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
 811                         host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
 812                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
 813
 814         if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
 815                         host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
 816                 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
 817
 818         /* If fails try again during next card power cycle */
 819         if (err)
 820                 goto err;
 821
 822         idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
 823
 824         /*
 825          * Unlike SD, MMC cards dont have a configuration register to notify
 826          * supported bus width. So bus test command should be run to identify
 827          * the supported bus width or compare the ext csd values of current
 828          * bus width and ext csd values of 1 bit mode read earlier.
 829          */
 830         for (; idx >= 0; idx--) {
 831
 832                 /*
 833                  * Host is capable of 8bit transfer, then switch
 834                  * the device to work in 8bit transfer mode. If the
 835                  * mmc switch command returns error then switch to
 836                  * 4bit transfer mode. On success set the corresponding
 837                  * bus width on the host.
 838                  */
 839                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 840                                  EXT_CSD_BUS_WIDTH,
 841                                  ext_csd_bits[idx],
 842                                  card->ext_csd.generic_cmd6_time);
 843                 if (err)
 844                         continue;
 845
 846                 mmc_set_bus_width(card->host, bus_widths[idx]);
 847
 848                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
 849                         err = mmc_compare_ext_csds(card, bus_widths[idx]);
 850                 else
 851                         err = mmc_bus_test(card, bus_widths[idx]);
 852                 if (!err)
 853                         break;
 854         }
 855
 856         /* switch to HS200 mode if bus width set successfully */
 857         if (!err)
 858                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 859                                  EXT_CSD_HS_TIMING, 2, 0);
 860 err:
 861         return err;
 862 }
 863
 864 /*
 865  * Handle the detection and initialisation of a card.
 866  *
 867  * In the case of a resume, "oldcard" will contain the card
 868  * we're trying to reinitialise.
 869  */
 870 static int mmc_init_card(struct mmc_host *host, u32 ocr,
 871         struct mmc_card *oldcard)
 872 {
 873         struct mmc_card *card;
 874         int err, ddr = 0;
 875         u32 cid[4];
 876         unsigned int max_dtr;
 877         u32 rocr;
 878         u8 *ext_csd = NULL;
 879
 880         BUG_ON(!host);
 881         WARN_ON(!host->claimed);
 882
 883         /* Set correct bus mode for MMC before attempting init */
 884         if (!mmc_host_is_spi(host))
 885                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
 886
 887         /*
 888          * Since we're changing the OCR value, we seem to
 889          * need to tell some cards to go back to the idle
 890          * state.  We wait 1ms to give cards time to
 891          * respond.
 892          * mmc_go_idle is needed for eMMC that are asleep
 893          */
 894         mmc_go_idle(host);
 895
 896         /* The extra bit indicates that we support high capacity */
 897         err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
 898         if (err)
 899                 goto err;
 900
 901         /*
 902          * For SPI, enable CRC as appropriate.
 903          */
 904         if (mmc_host_is_spi(host)) {
 905                 err = mmc_spi_set_crc(host, use_spi_crc);
 906                 if (err)
 907                         goto err;
 908         }
 909
 910         /*
 911          * Fetch CID from card.
 912          */
 913         if (mmc_host_is_spi(host))
 914                 err = mmc_send_cid(host, cid);
 915         else
 916                 err = mmc_all_send_cid(host, cid);
 917         if (err)
 918                 goto err;
 919
 920         if (oldcard) {
 921                 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
 922                         err = -ENOENT;
 923                         goto err;
 924                 }
 925
 926                 card = oldcard;
 927         } else {
 928                 /*
 929                  * Allocate card structure.
 930                  */
 931                 card = mmc_alloc_card(host, &mmc_type);
 932                 if (IS_ERR(card)) {
 933                         err = PTR_ERR(card);
 934                         goto err;
 935                 }
 936
 937                 card->type = MMC_TYPE_MMC;
 938                 card->rca = 1;
 939                 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
 940         }
 941
 942         /*
 943          * For native busses:  set card RCA and quit open drain mode.
 944          */
 945         if (!mmc_host_is_spi(host)) {
 946                 err = mmc_set_relative_addr(card);
 947                 if (err)
 948                         goto free_card;
 949
 950                 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
 951         }
 952
 953         if (!oldcard) {
 954                 /*
 955                  * Fetch CSD from card.
 956                  */
 957                 err = mmc_send_csd(card, card->raw_csd);
 958                 if (err)
 959                         goto free_card;
 960
 961                 err = mmc_decode_csd(card);
 962                 if (err)
 963                         goto free_card;
 964                 err = mmc_decode_cid(card);
 965                 if (err)
 966                         goto free_card;
 967         }
 968
 969         /*
 970          * Select card, as all following commands rely on that.
 971          */
 972         if (!mmc_host_is_spi(host)) {
 973                 err = mmc_select_card(card);
 974                 if (err)
 975                         goto free_card;
 976         }
 977
 978         if (!oldcard) {
 979                 /*
 980                  * Fetch and process extended CSD.
 981                  */
 982
 983                 err = mmc_get_ext_csd(card, &ext_csd);
 984                 if (err)
 985                         goto free_card;
 986                 err = mmc_read_ext_csd(card, ext_csd);
 987                 if (err)
 988                         goto free_card;
 989
 990                 /* If doing byte addressing, check if required to do sector
 991                  * addressing.  Handle the case of <2GB cards needing sector
 992                  * addressing.  See section 8.1 JEDEC Standard JED84-A441;
 993                  * ocr register has bit 30 set for sector addressing.
 994                  */
 995                 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
 996                         mmc_card_set_blockaddr(card);
 997
 998                 /* Erase size depends on CSD and Extended CSD */
 999                 mmc_set_erase_size(card);
1000         }
1001
1002         /*
1003          * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1004          * bit.  This bit will be lost every time after a reset or power off.
1005          */
1006         if (card->ext_csd.enhanced_area_en ||
1007             (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1008                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1009                                  EXT_CSD_ERASE_GROUP_DEF, 1,
1010                                  card->ext_csd.generic_cmd6_time);
1011
1012                 if (err && err != -EBADMSG)
1013                         goto free_card;
1014
1015                 if (err) {
1016                         err = 0;
1017                         /*
1018                          * Just disable enhanced area off & sz
1019                          * will try to enable ERASE_GROUP_DEF
1020                          * during next time reinit
1021                          */
1022                         card->ext_csd.enhanced_area_offset = -EINVAL;
1023                         card->ext_csd.enhanced_area_size = -EINVAL;
1024                 } else {
1025                         card->ext_csd.erase_group_def = 1;
1026                         /*
1027                          * enable ERASE_GRP_DEF successfully.
1028                          * This will affect the erase size, so
1029                          * here need to reset erase size
1030                          */
1031                         mmc_set_erase_size(card);
1032                 }
1033         }
1034
1035         /*
1036          * Ensure eMMC user default partition is enabled
1037          */
1038         if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1039                 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1040                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1041                                  card->ext_csd.part_config,
1042                                  card->ext_csd.part_time);
1043                 if (err && err != -EBADMSG)
1044                         goto free_card;
1045         }
1046
1047         /*
1048          * Enable power_off_notification byte in the ext_csd register
1049          */
1050         if (card->ext_csd.rev >= 6) {
1051                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1052                                  EXT_CSD_POWER_OFF_NOTIFICATION,
1053                                  EXT_CSD_POWER_ON,
1054                                  card->ext_csd.generic_cmd6_time);
1055                 if (err && err != -EBADMSG)
1056                         goto free_card;
1057
1058                 /*
1059                  * The err can be -EBADMSG or 0,
1060                  * so check for success and update the flag
1061                  */
1062                 if (!err)
1063                         card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1064         }
1065
1066         /*
1067          * Activate high speed (if supported)
1068          */
1069         if (card->ext_csd.hs_max_dtr != 0) {
1070                 err = 0;
1071                 if (card->ext_csd.hs_max_dtr > 52000000 &&
1072                     host->caps2 & MMC_CAP2_HS200)
1073                         err = mmc_select_hs200(card);
1074                 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1075                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1076                                          EXT_CSD_HS_TIMING, 1,
1077                                          card->ext_csd.generic_cmd6_time);
1078
1079                 if (err && err != -EBADMSG)
1080                         goto free_card;
1081
1082                 if (err) {
1083                         pr_warning("%s: switch to highspeed failed\n",
1084                                mmc_hostname(card->host));
1085                         err = 0;
1086                 } else {
1087                         if (card->ext_csd.hs_max_dtr > 52000000 &&
1088                             host->caps2 & MMC_CAP2_HS200) {
1089                                 mmc_card_set_hs200(card);
1090                                 mmc_set_timing(card->host,
1091                                                MMC_TIMING_MMC_HS200);
1092                         } else {
1093                                 mmc_card_set_highspeed(card);
1094                                 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1095                         }
1096                 }
1097         }
1098
1099         /*
1100          * Compute bus speed.
1101          */
1102         max_dtr = (unsigned int)-1;
1103
1104         if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1105                 if (max_dtr > card->ext_csd.hs_max_dtr)
1106                         max_dtr = card->ext_csd.hs_max_dtr;
1107                 if (mmc_card_highspeed(card) && (max_dtr > 52000000))
1108                         max_dtr = 52000000;
1109         } else if (max_dtr > card->csd.max_dtr) {
1110                 max_dtr = card->csd.max_dtr;
1111         }
1112
1113         mmc_set_clock(host, max_dtr);
1114
1115         /*
1116          * Indicate DDR mode (if supported).
1117          */
1118         if (mmc_card_highspeed(card)) {
1119                 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1120                         && ((host->caps & (MMC_CAP_1_8V_DDR |
1121                              MMC_CAP_UHS_DDR50))
1122                                 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
1123                                 ddr = MMC_1_8V_DDR_MODE;
1124                 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1125                         && ((host->caps & (MMC_CAP_1_2V_DDR |
1126                              MMC_CAP_UHS_DDR50))
1127                                 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
1128                                 ddr = MMC_1_2V_DDR_MODE;
1129         }
1130
1131         /*
1132          * Indicate HS200 SDR mode (if supported).
1133          */
1134         if (mmc_card_hs200(card)) {
1135                 u32 ext_csd_bits;
1136                 u32 bus_width = card->host->ios.bus_width;
1137
1138                 /*
1139                  * For devices supporting HS200 mode, the bus width has
1140                  * to be set before executing the tuning function. If
1141                  * set before tuning, then device will respond with CRC
1142                  * errors for responses on CMD line. So for HS200 the
1143                  * sequence will be
1144                  * 1. set bus width 4bit / 8 bit (1 bit not supported)
1145                  * 2. switch to HS200 mode
1146                  * 3. set the clock to > 52Mhz <=200MHz and
1147                  * 4. execute tuning for HS200
1148                  */
1149                 if ((host->caps2 & MMC_CAP2_HS200) &&
1150                     card->host->ops->execute_tuning) {
1151                         mmc_host_clk_hold(card->host);
1152                         err = card->host->ops->execute_tuning(card->host,
1153                                 MMC_SEND_TUNING_BLOCK_HS200);
1154                         mmc_host_clk_release(card->host);
1155                 }
1156                 if (err) {
1157                         pr_warning("%s: tuning execution failed\n",
1158                                    mmc_hostname(card->host));
1159                         goto err;
1160                 }
1161
1162                 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1163                                 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1164                 err = mmc_select_powerclass(card, ext_csd_bits);
1165                 if (err)
1166                         pr_warning("%s: power class selection to bus width %d"
1167                                    " failed\n", mmc_hostname(card->host),
1168                                    1 << bus_width);
1169         }
1170
1171         /*
1172          * Activate wide bus and DDR (if supported).
1173          */
1174         if (!mmc_card_hs200(card) &&
1175             (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1176             (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1177                 static unsigned ext_csd_bits[][2] = {
1178                         { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1179                         { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1180                         { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1181                 };
1182                 static unsigned bus_widths[] = {
1183                         MMC_BUS_WIDTH_8,
1184                         MMC_BUS_WIDTH_4,
1185                         MMC_BUS_WIDTH_1
1186                 };
1187                 unsigned idx, bus_width = 0;
1188
1189                 if (host->caps & MMC_CAP_8_BIT_DATA)
1190                         idx = 0;
1191                 else
1192                         idx = 1;
1193                 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1194                         bus_width = bus_widths[idx];
1195                         if (bus_width == MMC_BUS_WIDTH_1)
1196                                 ddr = 0; /* no DDR for 1-bit width */
1197                         err = mmc_select_powerclass(card, ext_csd_bits[idx][0]);
1198                         if (err)
1199                                 pr_warning("%s: power class selection to "
1200                                            "bus width %d failed\n",
1201                                            mmc_hostname(card->host),
1202                                            1 << bus_width);
1203
1204                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1205                                          EXT_CSD_BUS_WIDTH,
1206                                          ext_csd_bits[idx][0],
1207                                          card->ext_csd.generic_cmd6_time);
1208                         if (!err) {
1209                                 mmc_set_bus_width(card->host, bus_width);
1210
1211                                 /*
1212                                  * If controller can't handle bus width test,
1213                                  * compare ext_csd previously read in 1 bit mode
1214                                  * against ext_csd at new bus width
1215                                  */
1216                                 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1217                                         err = mmc_compare_ext_csds(card,
1218                                                 bus_width);
1219                                 else
1220                                         err = mmc_bus_test(card, bus_width);
1221                                 if (!err)
1222                                         break;
1223                         }
1224                 }
1225
1226                 if (!err && ddr) {
1227                         err = mmc_select_powerclass(card, ext_csd_bits[idx][1]);
1228                         if (err)
1229                                 pr_warning("%s: power class selection to "
1230                                            "bus width %d ddr %d failed\n",
1231                                            mmc_hostname(card->host),
1232                                            1 << bus_width, ddr);
1233
1234                         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1235                                          EXT_CSD_BUS_WIDTH,
1236                                          ext_csd_bits[idx][1],
1237                                          card->ext_csd.generic_cmd6_time);
1238                 }
1239                 if (err) {
1240                         pr_warning("%s: switch to bus width %d ddr %d "
1241                                 "failed\n", mmc_hostname(card->host),
1242                                 1 << bus_width, ddr);
1243                         goto free_card;
1244                 } else if (ddr) {
1245                         /*
1246                          * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1247                          * signaling.
1248                          *
1249                          * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1250                          *
1251                          * 1.8V vccq at 3.3V core voltage (vcc) is not required
1252                          * in the JEDEC spec for DDR.
1253                          *
1254                          * Do not force change in vccq since we are obviously
1255                          * working and no change to vccq is needed.
1256                          *
1257                          * WARNING: eMMC rules are NOT the same as SD DDR
1258                          */
1259                         if (ddr == MMC_1_2V_DDR_MODE) {
1260                                 err = __mmc_set_signal_voltage(host,
1261                                         MMC_SIGNAL_VOLTAGE_120);
1262                                 if (err)
1263                                         goto err;
1264                         }
1265                         mmc_card_set_ddr_mode(card);
1266                         mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1267                         mmc_set_bus_width(card->host, bus_width);
1268                 }
1269         }
1270
1271         /*
1272          * Enable HPI feature (if supported)
1273          */
1274         if (card->ext_csd.hpi) {
1275                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1276                                 EXT_CSD_HPI_MGMT, 1,
1277                                 card->ext_csd.generic_cmd6_time);
1278                 if (err && err != -EBADMSG)
1279                         goto free_card;
1280                 if (err) {
1281                         pr_warning("%s: Enabling HPI failed\n",
1282                                    mmc_hostname(card->host));
1283                         err = 0;
1284                 } else
1285                         card->ext_csd.hpi_en = 1;
1286         }
1287
1288         /*
1289          * If cache size is higher than 0, this indicates
1290          * the existence of cache and it can be turned on.
1291          */
1292         if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1293                         card->ext_csd.cache_size > 0) {
1294                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1295                                 EXT_CSD_CACHE_CTRL, 1,
1296                                 card->ext_csd.generic_cmd6_time);
1297                 if (err && err != -EBADMSG)
1298                         goto free_card;
1299
1300                 /*
1301                  * Only if no error, cache is turned on successfully.
1302                  */
1303                 if (err) {
1304                         pr_warning("%s: Cache is supported, "
1305                                         "but failed to turn on (%d)\n",
1306                                         mmc_hostname(card->host), err);
1307                         card->ext_csd.cache_ctrl = 0;
1308                         err = 0;
1309                 } else {
1310                         card->ext_csd.cache_ctrl = 1;
1311                 }
1312         }
1313
1314         /*
1315          * The mandatory minimum values are defined for packed command.
1316          * read: 5, write: 3
1317          */
1318         if (card->ext_csd.max_packed_writes >= 3 &&
1319             card->ext_csd.max_packed_reads >= 5 &&
1320             host->caps2 & MMC_CAP2_PACKED_CMD) {
1321                 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1322                                 EXT_CSD_EXP_EVENTS_CTRL,
1323                                 EXT_CSD_PACKED_EVENT_EN,
1324                                 card->ext_csd.generic_cmd6_time);
1325                 if (err && err != -EBADMSG)
1326                         goto free_card;
1327                 if (err) {
1328                         pr_warn("%s: Enabling packed event failed\n",
1329                                 mmc_hostname(card->host));
1330                         card->ext_csd.packed_event_en = 0;
1331                         err = 0;
1332                 } else {
1333                         card->ext_csd.packed_event_en = 1;
1334                 }
1335         }
1336
1337         if (!oldcard)
1338                 host->card = card;
1339
1340         mmc_free_ext_csd(ext_csd);
1341         return 0;
1342
1343 free_card:
1344         if (!oldcard)
1345                 mmc_remove_card(card);
1346 err:
1347         mmc_free_ext_csd(ext_csd);
1348
1349         return err;
1350 }
1351
1352 static int mmc_can_sleep(struct mmc_card *card)
1353 {
1354         return (card && card->ext_csd.rev >= 3);
1355 }
1356
1357 static int mmc_sleep(struct mmc_host *host)
1358 {
1359         struct mmc_command cmd = {0};
1360         struct mmc_card *card = host->card;
1361         int err;
1362
1363         if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
1364                 return 0;
1365
1366         err = mmc_deselect_cards(host);
1367         if (err)
1368                 return err;
1369
1370         cmd.opcode = MMC_SLEEP_AWAKE;
1371         cmd.arg = card->rca << 16;
1372         cmd.arg |= 1 << 15;
1373
1374         cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1375         err = mmc_wait_for_cmd(host, &cmd, 0);
1376         if (err)
1377                 return err;
1378
1379         /*
1380          * If the host does not wait while the card signals busy, then we will
1381          * will have to wait the sleep/awake timeout.  Note, we cannot use the
1382          * SEND_STATUS command to poll the status because that command (and most
1383          * others) is invalid while the card sleeps.
1384          */
1385         if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1386                 mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000));
1387
1388         return err;
1389 }
1390
1391 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1392 {
1393         return card &&
1394                 mmc_card_mmc(card) &&
1395                 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1396 }
1397
1398 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1399 {
1400         unsigned int timeout = card->ext_csd.generic_cmd6_time;
1401         int err;
1402
1403         /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1404         if (notify_type == EXT_CSD_POWER_OFF_LONG)
1405                 timeout = card->ext_csd.power_off_longtime;
1406
1407         err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1408                          EXT_CSD_POWER_OFF_NOTIFICATION,
1409                          notify_type, timeout);
1410         if (err)
1411                 pr_err("%s: Power Off Notification timed out, %u\n",
1412                        mmc_hostname(card->host), timeout);
1413
1414         /* Disable the power off notification after the switch operation. */
1415         card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1416
1417         return err;
1418 }
1419
1420 /*
1421  * Host is being removed. Free up the current card.
1422  */
1423 static void mmc_remove(struct mmc_host *host)
1424 {
1425         BUG_ON(!host);
1426         BUG_ON(!host->card);
1427
1428         mmc_remove_card(host->card);
1429         host->card = NULL;
1430 }
1431
1432 /*
1433  * Card detection - card is alive.
1434  */
1435 static int mmc_alive(struct mmc_host *host)
1436 {
1437         return mmc_send_status(host->card, NULL);
1438 }
1439
1440 /*
1441  * Card detection callback from host.
1442  */
1443 static void mmc_detect(struct mmc_host *host)
1444 {
1445         int err;
1446
1447         BUG_ON(!host);
1448         BUG_ON(!host->card);
1449
1450         mmc_get_card(host->card);
1451
1452         /*
1453          * Just check if our card has been removed.
1454          */
1455         err = _mmc_detect_card_removed(host);
1456
1457         mmc_put_card(host->card);
1458
1459         if (err) {
1460                 mmc_remove(host);
1461
1462                 mmc_claim_host(host);
1463                 mmc_detach_bus(host);
1464                 mmc_power_off(host);
1465                 mmc_release_host(host);
1466         }
1467 }
1468
1469 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1470 {
1471         int err = 0;
1472         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1473                                         EXT_CSD_POWER_OFF_LONG;
1474
1475         BUG_ON(!host);
1476         BUG_ON(!host->card);
1477
1478         mmc_claim_host(host);
1479
1480         if (mmc_card_doing_bkops(host->card)) {
1481                 err = mmc_stop_bkops(host->card);
1482                 if (err)
1483                         goto out;
1484         }
1485
1486         err = mmc_cache_ctrl(host, 0);
1487         if (err)
1488                 goto out;
1489
1490         if (mmc_can_poweroff_notify(host->card) &&
1491                 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1492                 err = mmc_poweroff_notify(host->card, notify_type);
1493         else if (mmc_can_sleep(host->card))
1494                 err = mmc_sleep(host);
1495         else if (!mmc_host_is_spi(host))
1496                 err = mmc_deselect_cards(host);
1497         host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1498
1499         if (!err)
1500                 mmc_power_off(host);
1501 out:
1502         mmc_release_host(host);
1503         return err;
1504 }
1505
1506 /*
1507  * Suspend callback from host.
1508  */
1509 static int mmc_suspend(struct mmc_host *host)
1510 {
1511         return _mmc_suspend(host, true);
1512 }
1513
1514 /*
1515  * Shutdown callback
1516  */
1517 static int mmc_shutdown(struct mmc_host *host)
1518 {
1519         return _mmc_suspend(host, false);
1520 }
1521
1522 /*
1523  * Resume callback from host.
1524  *
1525  * This function tries to determine if the same card is still present
1526  * and, if so, restore all state to it.
1527  */
1528 static int mmc_resume(struct mmc_host *host)
1529 {
1530         int err;
1531
1532         BUG_ON(!host);
1533         BUG_ON(!host->card);
1534
1535         mmc_claim_host(host);
1536         mmc_power_up(host);
1537         mmc_select_voltage(host, host->ocr);
1538         err = mmc_init_card(host, host->ocr, host->card);
1539         mmc_release_host(host);
1540
1541         return err;
1542 }
1543
1544
1545 /*
1546  * Callback for runtime_suspend.
1547  */
1548 static int mmc_runtime_suspend(struct mmc_host *host)
1549 {
1550         int err;
1551
1552         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1553                 return 0;
1554
1555         mmc_claim_host(host);
1556
1557         err = mmc_suspend(host);
1558         if (err) {
1559                 pr_err("%s: error %d doing aggessive suspend\n",
1560                         mmc_hostname(host), err);
1561                 goto out;
1562         }
1563         mmc_power_off(host);
1564
1565 out:
1566         mmc_release_host(host);
1567         return err;
1568 }
1569
1570 /*
1571  * Callback for runtime_resume.
1572  */
1573 static int mmc_runtime_resume(struct mmc_host *host)
1574 {
1575         int err;
1576
1577         if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1578                 return 0;
1579
1580         mmc_claim_host(host);
1581
1582         mmc_power_up(host);
1583         err = mmc_resume(host);
1584         if (err)
1585                 pr_err("%s: error %d doing aggessive resume\n",
1586                         mmc_hostname(host), err);
1587
1588         mmc_release_host(host);
1589         return 0;
1590 }
1591
1592 static int mmc_power_restore(struct mmc_host *host)
1593 {
1594         int ret;
1595
1596         host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1597         mmc_claim_host(host);
1598         ret = mmc_init_card(host, host->ocr, host->card);
1599         mmc_release_host(host);
1600
1601         return ret;
1602 }
1603
1604 static const struct mmc_bus_ops mmc_ops = {
1605         .remove = mmc_remove,
1606         .detect = mmc_detect,
1607         .suspend = NULL,
1608         .resume = NULL,
1609         .power_restore = mmc_power_restore,
1610         .alive = mmc_alive,
1611         .shutdown = mmc_shutdown,
1612 };
1613
1614 static const struct mmc_bus_ops mmc_ops_unsafe = {
1615         .remove = mmc_remove,
1616         .detect = mmc_detect,
1617         .suspend = mmc_suspend,
1618         .resume = mmc_resume,
1619         .runtime_suspend = mmc_runtime_suspend,
1620         .runtime_resume = mmc_runtime_resume,
1621         .power_restore = mmc_power_restore,
1622         .alive = mmc_alive,
1623         .shutdown = mmc_shutdown,
1624 };
1625
1626 static void mmc_attach_bus_ops(struct mmc_host *host)
1627 {
1628         const struct mmc_bus_ops *bus_ops;
1629
1630         if (!mmc_card_is_removable(host))
1631                 bus_ops = &mmc_ops_unsafe;
1632         else
1633                 bus_ops = &mmc_ops;
1634         mmc_attach_bus(host, bus_ops);
1635 }
1636
1637 /*
1638  * Starting point for MMC card init.
1639  */
1640 int mmc_attach_mmc(struct mmc_host *host)
1641 {
1642         int err;
1643         u32 ocr;
1644
1645         BUG_ON(!host);
1646         WARN_ON(!host->claimed);
1647
1648         /* Set correct bus mode for MMC before attempting attach */
1649         if (!mmc_host_is_spi(host))
1650                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1651
1652         err = mmc_send_op_cond(host, 0, &ocr);
1653         if (err)
1654                 return err;
1655
1656         mmc_attach_bus_ops(host);
1657         if (host->ocr_avail_mmc)
1658                 host->ocr_avail = host->ocr_avail_mmc;
1659
1660         /*
1661          * We need to get OCR a different way for SPI.
1662          */
1663         if (mmc_host_is_spi(host)) {
1664                 err = mmc_spi_read_ocr(host, 1, &ocr);
1665                 if (err)
1666                         goto err;
1667         }
1668
1669         /*
1670          * Sanity check the voltages that the card claims to
1671          * support.
1672          */
1673         if (ocr & 0x7F) {
1674                 pr_warning("%s: card claims to support voltages "
1675                        "below the defined range. These will be ignored.\n",
1676                        mmc_hostname(host));
1677                 ocr &= ~0x7F;
1678         }
1679
1680         host->ocr = mmc_select_voltage(host, ocr);
1681
1682         /*
1683          * Can we support the voltage of the card?
1684          */
1685         if (!host->ocr) {
1686                 err = -EINVAL;
1687                 goto err;
1688         }
1689
1690         /*
1691          * Detect and init the card.
1692          */
1693         err = mmc_init_card(host, host->ocr, NULL);
1694         if (err)
1695                 goto err;
1696
1697         mmc_release_host(host);
1698         err = mmc_add_card(host->card);
1699         mmc_claim_host(host);
1700         if (err)
1701                 goto remove_card;
1702
1703         return 0;
1704
1705 remove_card:
1706         mmc_release_host(host);
1707         mmc_remove_card(host->card);
1708         mmc_claim_host(host);
1709         host->card = NULL;
1710 err:
1711         mmc_detach_bus(host);
1712
1713         pr_err("%s: error %d whilst initialising MMC card\n",
1714                 mmc_hostname(host), err);
1715
1716         return err;
1717 }