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]; 422 423 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 424 card->ext_csd.raw_erase_timeout_mult = 425 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 426 card->ext_csd.raw_hc_erase_grp_size = 427 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 428 card->ext_csd.raw_boot_mult = 429 ext_csd[EXT_CSD_BOOT_MULT]; 430 if (card->ext_csd.rev >= 3) { 431 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 432 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 433 434 /* EXT_CSD value is in units of 10ms, but we store in ms */ 435 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 436 437 /* Sleep / awake timeout in 100ns units */ 438 if (sa_shift > 0 && sa_shift <= 0x17) 439 card->ext_csd.sa_timeout = 440 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 441 card->ext_csd.erase_group_def = 442 ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 443 card->ext_csd.hc_erase_timeout = 300 * 444 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 445 card->ext_csd.hc_erase_size = 446 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 447 448 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 449 450 /* 451 * There are two boot regions of equal size, defined in 452 * multiples of 128K. 453 */ 454 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 455 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 456 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 457 mmc_part_add(card, part_size, 458 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 459 "boot%d", idx, true, 460 MMC_BLK_DATA_AREA_BOOT); 461 } 462 } 463 } 464 465 card->ext_csd.raw_hc_erase_gap_size = 466 ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 467 card->ext_csd.raw_sec_trim_mult = 468 ext_csd[EXT_CSD_SEC_TRIM_MULT]; 469 card->ext_csd.raw_sec_erase_mult = 470 ext_csd[EXT_CSD_SEC_ERASE_MULT]; 471 card->ext_csd.raw_sec_feature_support = 472 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 473 card->ext_csd.raw_trim_mult = 474 ext_csd[EXT_CSD_TRIM_MULT]; 475 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 476 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; 477 if (card->ext_csd.rev >= 4) { 478 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & 479 EXT_CSD_PART_SETTING_COMPLETED) 480 card->ext_csd.partition_setting_completed = 1; 481 else 482 card->ext_csd.partition_setting_completed = 0; 483 484 mmc_manage_enhanced_area(card, ext_csd); 485 486 mmc_manage_gp_partitions(card, ext_csd); 487 488 card->ext_csd.sec_trim_mult = 489 ext_csd[EXT_CSD_SEC_TRIM_MULT]; 490 card->ext_csd.sec_erase_mult = 491 ext_csd[EXT_CSD_SEC_ERASE_MULT]; 492 card->ext_csd.sec_feature_support = 493 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 494 card->ext_csd.trim_timeout = 300 * 495 ext_csd[EXT_CSD_TRIM_MULT]; 496 497 /* 498 * Note that the call to mmc_part_add above defaults to read 499 * only. If this default assumption is changed, the call must 500 * take into account the value of boot_locked below. 501 */ 502 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; 503 card->ext_csd.boot_ro_lockable = true; 504 505 /* Save power class values */ 506 card->ext_csd.raw_pwr_cl_52_195 = 507 ext_csd[EXT_CSD_PWR_CL_52_195]; 508 card->ext_csd.raw_pwr_cl_26_195 = 509 ext_csd[EXT_CSD_PWR_CL_26_195]; 510 card->ext_csd.raw_pwr_cl_52_360 = 511 ext_csd[EXT_CSD_PWR_CL_52_360]; 512 card->ext_csd.raw_pwr_cl_26_360 = 513 ext_csd[EXT_CSD_PWR_CL_26_360]; 514 card->ext_csd.raw_pwr_cl_200_195 = 515 ext_csd[EXT_CSD_PWR_CL_200_195]; 516 card->ext_csd.raw_pwr_cl_200_360 = 517 ext_csd[EXT_CSD_PWR_CL_200_360]; 518 card->ext_csd.raw_pwr_cl_ddr_52_195 = 519 ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; 520 card->ext_csd.raw_pwr_cl_ddr_52_360 = 521 ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; 522 card->ext_csd.raw_pwr_cl_ddr_200_360 = 523 ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; 524 } 525 526 if (card->ext_csd.rev >= 5) { 527 /* Adjust production date as per JEDEC JESD84-B451 */ 528 if (card->cid.year < 2010) 529 card->cid.year += 16; 530 531 /* check whether the eMMC card supports BKOPS */ 532 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { 533 card->ext_csd.bkops = 1; 534 card->ext_csd.man_bkops_en = 535 (ext_csd[EXT_CSD_BKOPS_EN] & 536 EXT_CSD_MANUAL_BKOPS_MASK); 537 card->ext_csd.raw_bkops_status = 538 ext_csd[EXT_CSD_BKOPS_STATUS]; 539 if (card->ext_csd.man_bkops_en) 540 pr_debug("%s: MAN_BKOPS_EN bit is set\n", 541 mmc_hostname(card->host)); 542 card->ext_csd.auto_bkops_en = 543 (ext_csd[EXT_CSD_BKOPS_EN] & 544 EXT_CSD_AUTO_BKOPS_MASK); 545 if (card->ext_csd.auto_bkops_en) 546 pr_debug("%s: AUTO_BKOPS_EN bit is set\n", 547 mmc_hostname(card->host)); 548 } 549 550 /* check whether the eMMC card supports HPI */ 551 if (!mmc_card_broken_hpi(card) && 552 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { 553 card->ext_csd.hpi = 1; 554 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 555 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 556 else 557 card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 558 /* 559 * Indicate the maximum timeout to close 560 * a command interrupted by HPI 561 */ 562 card->ext_csd.out_of_int_time = 563 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 564 } 565 566 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 567 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 568 569 /* 570 * RPMB regions are defined in multiples of 128K. 571 */ 572 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; 573 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { 574 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, 575 EXT_CSD_PART_CONFIG_ACC_RPMB, 576 "rpmb", 0, false, 577 MMC_BLK_DATA_AREA_RPMB); 578 } 579 } 580 581 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 582 if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 583 card->erased_byte = 0xFF; 584 else 585 card->erased_byte = 0x0; 586 587 /* eMMC v4.5 or later */ 588 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS; 589 if (card->ext_csd.rev >= 6) { 590 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 591 592 card->ext_csd.generic_cmd6_time = 10 * 593 ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 594 card->ext_csd.power_off_longtime = 10 * 595 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 596 597 card->ext_csd.cache_size = 598 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 599 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 600 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 601 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 602 603 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) 604 card->ext_csd.data_sector_size = 4096; 605 else 606 card->ext_csd.data_sector_size = 512; 607 608 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && 609 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { 610 card->ext_csd.data_tag_unit_size = 611 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * 612 (card->ext_csd.data_sector_size); 613 } else { 614 card->ext_csd.data_tag_unit_size = 0; 615 } 616 617 card->ext_csd.max_packed_writes = 618 ext_csd[EXT_CSD_MAX_PACKED_WRITES]; 619 card->ext_csd.max_packed_reads = 620 ext_csd[EXT_CSD_MAX_PACKED_READS]; 621 } else { 622 card->ext_csd.data_sector_size = 512; 623 } 624 625 /* 626 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined 627 * when accessing a specific field", so use it here if there is no 628 * PARTITION_SWITCH_TIME. 629 */ 630 if (!card->ext_csd.part_time) 631 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time; 632 /* Some eMMC set the value too low so set a minimum */ 633 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) 634 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; 635 636 /* eMMC v5 or later */ 637 if (card->ext_csd.rev >= 7) { 638 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], 639 MMC_FIRMWARE_LEN); 640 card->ext_csd.ffu_capable = 641 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && 642 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); 643 644 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; 645 card->ext_csd.device_life_time_est_typ_a = 646 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]; 647 card->ext_csd.device_life_time_est_typ_b = 648 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]; 649 } 650 651 /* eMMC v5.1 or later */ 652 if (card->ext_csd.rev >= 8) { 653 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] & 654 EXT_CSD_CMDQ_SUPPORTED; 655 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] & 656 EXT_CSD_CMDQ_DEPTH_MASK) + 1; 657 /* Exclude inefficiently small queue depths */ 658 if (card->ext_csd.cmdq_depth <= 2) { 659 card->ext_csd.cmdq_support = false; 660 card->ext_csd.cmdq_depth = 0; 661 } 662 if (card->ext_csd.cmdq_support) { 663 pr_debug("%s: Command Queue supported depth %u\n", 664 mmc_hostname(card->host), 665 card->ext_csd.cmdq_depth); 666 } 667 card->ext_csd.enhanced_rpmb_supported = 668 (card->ext_csd.rel_param & 669 EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR); 670 } 671 out: 672 return err; 673 } 674 675 static int mmc_read_ext_csd(struct mmc_card *card) 676 { 677 u8 *ext_csd; 678 int err; 679 680 if (!mmc_can_ext_csd(card)) 681 return 0; 682 683 err = mmc_get_ext_csd(card, &ext_csd); 684 if (err) { 685 /* If the host or the card can't do the switch, 686 * fail more gracefully. */ 687 if ((err != -EINVAL) 688 && (err != -ENOSYS) 689 && (err != -EFAULT)) 690 return err; 691 692 /* 693 * High capacity cards should have this "magic" size 694 * stored in their CSD. 695 */ 696 if (card->csd.capacity == (4096 * 512)) { 697 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", 698 mmc_hostname(card->host)); 699 } else { 700 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", 701 mmc_hostname(card->host)); 702 err = 0; 703 } 704 705 return err; 706 } 707 708 err = mmc_decode_ext_csd(card, ext_csd); 709 kfree(ext_csd); 710 return err; 711 } 712 713 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 714 { 715 u8 *bw_ext_csd; 716 int err; 717 718 if (bus_width == MMC_BUS_WIDTH_1) 719 return 0; 720 721 err = mmc_get_ext_csd(card, &bw_ext_csd); 722 if (err) 723 return err; 724 725 /* only compare read only fields */ 726 err = !((card->ext_csd.raw_partition_support == 727 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 728 (card->ext_csd.raw_erased_mem_count == 729 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 730 (card->ext_csd.rev == 731 bw_ext_csd[EXT_CSD_REV]) && 732 (card->ext_csd.raw_ext_csd_structure == 733 bw_ext_csd[EXT_CSD_STRUCTURE]) && 734 (card->ext_csd.raw_card_type == 735 bw_ext_csd[EXT_CSD_CARD_TYPE]) && 736 (card->ext_csd.raw_s_a_timeout == 737 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 738 (card->ext_csd.raw_hc_erase_gap_size == 739 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 740 (card->ext_csd.raw_erase_timeout_mult == 741 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 742 (card->ext_csd.raw_hc_erase_grp_size == 743 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 744 (card->ext_csd.raw_sec_trim_mult == 745 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 746 (card->ext_csd.raw_sec_erase_mult == 747 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 748 (card->ext_csd.raw_sec_feature_support == 749 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 750 (card->ext_csd.raw_trim_mult == 751 bw_ext_csd[EXT_CSD_TRIM_MULT]) && 752 (card->ext_csd.raw_sectors[0] == 753 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 754 (card->ext_csd.raw_sectors[1] == 755 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 756 (card->ext_csd.raw_sectors[2] == 757 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 758 (card->ext_csd.raw_sectors[3] == 759 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && 760 (card->ext_csd.raw_pwr_cl_52_195 == 761 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && 762 (card->ext_csd.raw_pwr_cl_26_195 == 763 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && 764 (card->ext_csd.raw_pwr_cl_52_360 == 765 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && 766 (card->ext_csd.raw_pwr_cl_26_360 == 767 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && 768 (card->ext_csd.raw_pwr_cl_200_195 == 769 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && 770 (card->ext_csd.raw_pwr_cl_200_360 == 771 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && 772 (card->ext_csd.raw_pwr_cl_ddr_52_195 == 773 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && 774 (card->ext_csd.raw_pwr_cl_ddr_52_360 == 775 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && 776 (card->ext_csd.raw_pwr_cl_ddr_200_360 == 777 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); 778 779 if (err) 780 err = -EINVAL; 781 782 kfree(bw_ext_csd); 783 return err; 784 } 785 786 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 787 card->raw_cid[2], card->raw_cid[3]); 788 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 789 card->raw_csd[2], card->raw_csd[3]); 790 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 791 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 792 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 793 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); 794 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 795 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 796 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 797 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 798 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); 799 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev); 800 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info); 801 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n", 802 card->ext_csd.device_life_time_est_typ_a, 803 card->ext_csd.device_life_time_est_typ_b); 804 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 805 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 806 card->ext_csd.enhanced_area_offset); 807 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 808 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); 809 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n", 810 card->ext_csd.enhanced_rpmb_supported); 811 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); 812 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); 813 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); 814 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en); 815 816 static ssize_t mmc_fwrev_show(struct device *dev, 817 struct device_attribute *attr, 818 char *buf) 819 { 820 struct mmc_card *card = mmc_dev_to_card(dev); 821 822 if (card->ext_csd.rev < 7) 823 return sysfs_emit(buf, "0x%x\n", card->cid.fwrev); 824 else 825 return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, 826 card->ext_csd.fwrev); 827 } 828 829 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); 830 831 static ssize_t mmc_dsr_show(struct device *dev, 832 struct device_attribute *attr, 833 char *buf) 834 { 835 struct mmc_card *card = mmc_dev_to_card(dev); 836 struct mmc_host *host = card->host; 837 838 if (card->csd.dsr_imp && host->dsr_req) 839 return sysfs_emit(buf, "0x%x\n", host->dsr); 840 else 841 /* return default DSR value */ 842 return sysfs_emit(buf, "0x%x\n", 0x404); 843 } 844 845 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 846 847 static struct attribute *mmc_std_attrs[] = { 848 &dev_attr_cid.attr, 849 &dev_attr_csd.attr, 850 &dev_attr_date.attr, 851 &dev_attr_erase_size.attr, 852 &dev_attr_preferred_erase_size.attr, 853 &dev_attr_fwrev.attr, 854 &dev_attr_ffu_capable.attr, 855 &dev_attr_hwrev.attr, 856 &dev_attr_manfid.attr, 857 &dev_attr_name.attr, 858 &dev_attr_oemid.attr, 859 &dev_attr_prv.attr, 860 &dev_attr_rev.attr, 861 &dev_attr_pre_eol_info.attr, 862 &dev_attr_life_time.attr, 863 &dev_attr_serial.attr, 864 &dev_attr_enhanced_area_offset.attr, 865 &dev_attr_enhanced_area_size.attr, 866 &dev_attr_raw_rpmb_size_mult.attr, 867 &dev_attr_enhanced_rpmb_supported.attr, 868 &dev_attr_rel_sectors.attr, 869 &dev_attr_ocr.attr, 870 &dev_attr_rca.attr, 871 &dev_attr_dsr.attr, 872 &dev_attr_cmdq_en.attr, 873 NULL, 874 }; 875 ATTRIBUTE_GROUPS(mmc_std); 876 877 static struct device_type mmc_type = { 878 .groups = mmc_std_groups, 879 }; 880 881 /* 882 * Select the PowerClass for the current bus width 883 * If power class is defined for 4/8 bit bus in the 884 * extended CSD register, select it by executing the 885 * mmc_switch command. 886 */ 887 static int __mmc_select_powerclass(struct mmc_card *card, 888 unsigned int bus_width) 889 { 890 struct mmc_host *host = card->host; 891 struct mmc_ext_csd *ext_csd = &card->ext_csd; 892 unsigned int pwrclass_val = 0; 893 int err = 0; 894 895 switch (1 << host->ios.vdd) { 896 case MMC_VDD_165_195: 897 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 898 pwrclass_val = ext_csd->raw_pwr_cl_26_195; 899 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 900 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 901 ext_csd->raw_pwr_cl_52_195 : 902 ext_csd->raw_pwr_cl_ddr_52_195; 903 else if (host->ios.clock <= MMC_HS200_MAX_DTR) 904 pwrclass_val = ext_csd->raw_pwr_cl_200_195; 905 break; 906 case MMC_VDD_27_28: 907 case MMC_VDD_28_29: 908 case MMC_VDD_29_30: 909 case MMC_VDD_30_31: 910 case MMC_VDD_31_32: 911 case MMC_VDD_32_33: 912 case MMC_VDD_33_34: 913 case MMC_VDD_34_35: 914 case MMC_VDD_35_36: 915 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 916 pwrclass_val = ext_csd->raw_pwr_cl_26_360; 917 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 918 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 919 ext_csd->raw_pwr_cl_52_360 : 920 ext_csd->raw_pwr_cl_ddr_52_360; 921 else if (host->ios.clock <= MMC_HS200_MAX_DTR) 922 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? 923 ext_csd->raw_pwr_cl_ddr_200_360 : 924 ext_csd->raw_pwr_cl_200_360; 925 break; 926 default: 927 pr_warn("%s: Voltage range not supported for power class\n", 928 mmc_hostname(host)); 929 return -EINVAL; 930 } 931 932 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 933 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 934 EXT_CSD_PWR_CL_8BIT_SHIFT; 935 else 936 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 937 EXT_CSD_PWR_CL_4BIT_SHIFT; 938 939 /* If the power class is different from the default value */ 940 if (pwrclass_val > 0) { 941 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 942 EXT_CSD_POWER_CLASS, 943 pwrclass_val, 944 card->ext_csd.generic_cmd6_time); 945 } 946 947 return err; 948 } 949 950 static int mmc_select_powerclass(struct mmc_card *card) 951 { 952 struct mmc_host *host = card->host; 953 u32 bus_width, ext_csd_bits; 954 int err, ddr; 955 956 /* Power class selection is supported for versions >= 4.0 */ 957 if (!mmc_can_ext_csd(card)) 958 return 0; 959 960 bus_width = host->ios.bus_width; 961 /* Power class values are defined only for 4/8 bit bus */ 962 if (bus_width == MMC_BUS_WIDTH_1) 963 return 0; 964 965 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; 966 if (ddr) 967 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 968 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 969 else 970 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 971 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; 972 973 err = __mmc_select_powerclass(card, ext_csd_bits); 974 if (err) 975 pr_warn("%s: power class selection to bus width %d ddr %d failed\n", 976 mmc_hostname(host), 1 << bus_width, ddr); 977 978 return err; 979 } 980 981 /* 982 * Set the bus speed for the selected speed mode. 983 */ 984 static void mmc_set_bus_speed(struct mmc_card *card) 985 { 986 unsigned int max_dtr = (unsigned int)-1; 987 988 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 989 max_dtr > card->ext_csd.hs200_max_dtr) 990 max_dtr = card->ext_csd.hs200_max_dtr; 991 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 992 max_dtr = card->ext_csd.hs_max_dtr; 993 else if (max_dtr > card->csd.max_dtr) 994 max_dtr = card->csd.max_dtr; 995 996 mmc_set_clock(card->host, max_dtr); 997 } 998 999 /* 1000 * Select the bus width amoung 4-bit and 8-bit(SDR). 1001 * If the bus width is changed successfully, return the selected width value. 1002 * Zero is returned instead of error value if the wide width is not supported. 1003 */ 1004 static int mmc_select_bus_width(struct mmc_card *card) 1005 { 1006 static unsigned ext_csd_bits[] = { 1007 EXT_CSD_BUS_WIDTH_8, 1008 EXT_CSD_BUS_WIDTH_4, 1009 }; 1010 static unsigned bus_widths[] = { 1011 MMC_BUS_WIDTH_8, 1012 MMC_BUS_WIDTH_4, 1013 }; 1014 struct mmc_host *host = card->host; 1015 unsigned idx, bus_width = 0; 1016 int err = 0; 1017 1018 if (!mmc_can_ext_csd(card) || 1019 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) 1020 return 0; 1021 1022 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; 1023 1024 /* 1025 * Unlike SD, MMC cards dont have a configuration register to notify 1026 * supported bus width. So bus test command should be run to identify 1027 * the supported bus width or compare the ext csd values of current 1028 * bus width and ext csd values of 1 bit mode read earlier. 1029 */ 1030 for (; idx < ARRAY_SIZE(bus_widths); idx++) { 1031 /* 1032 * Host is capable of 8bit transfer, then switch 1033 * the device to work in 8bit transfer mode. If the 1034 * mmc switch command returns error then switch to 1035 * 4bit transfer mode. On success set the corresponding 1036 * bus width on the host. 1037 */ 1038 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1039 EXT_CSD_BUS_WIDTH, 1040 ext_csd_bits[idx], 1041 card->ext_csd.generic_cmd6_time); 1042 if (err) 1043 continue; 1044 1045 bus_width = bus_widths[idx]; 1046 mmc_set_bus_width(host, bus_width); 1047 1048 /* 1049 * If controller can't handle bus width test, 1050 * compare ext_csd previously read in 1 bit mode 1051 * against ext_csd at new bus width 1052 */ 1053 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 1054 err = mmc_compare_ext_csds(card, bus_width); 1055 else 1056 err = mmc_bus_test(card, bus_width); 1057 1058 if (!err) { 1059 err = bus_width; 1060 break; 1061 } else { 1062 pr_warn("%s: switch to bus width %d failed\n", 1063 mmc_hostname(host), 1 << bus_width); 1064 } 1065 } 1066 1067 return err; 1068 } 1069 1070 /* 1071 * Switch to the high-speed mode 1072 */ 1073 static int mmc_select_hs(struct mmc_card *card) 1074 { 1075 int err; 1076 1077 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1078 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 1079 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS, 1080 true, true, MMC_CMD_RETRIES); 1081 if (err) 1082 pr_warn("%s: switch to high-speed failed, err:%d\n", 1083 mmc_hostname(card->host), err); 1084 1085 return err; 1086 } 1087 1088 /* 1089 * Activate wide bus and DDR if supported. 1090 */ 1091 static int mmc_select_hs_ddr(struct mmc_card *card) 1092 { 1093 struct mmc_host *host = card->host; 1094 u32 bus_width, ext_csd_bits; 1095 int err = 0; 1096 1097 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) 1098 return 0; 1099 1100 bus_width = host->ios.bus_width; 1101 if (bus_width == MMC_BUS_WIDTH_1) 1102 return 0; 1103 1104 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 1105 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 1106 1107 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1108 EXT_CSD_BUS_WIDTH, 1109 ext_csd_bits, 1110 card->ext_csd.generic_cmd6_time, 1111 MMC_TIMING_MMC_DDR52, 1112 true, true, MMC_CMD_RETRIES); 1113 if (err) { 1114 pr_err("%s: switch to bus width %d ddr failed\n", 1115 mmc_hostname(host), 1 << bus_width); 1116 return err; 1117 } 1118 1119 /* 1120 * eMMC cards can support 3.3V to 1.2V i/o (vccq) 1121 * signaling. 1122 * 1123 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 1124 * 1125 * 1.8V vccq at 3.3V core voltage (vcc) is not required 1126 * in the JEDEC spec for DDR. 1127 * 1128 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all 1129 * host controller can support this, like some of the SDHCI 1130 * controller which connect to an eMMC device. Some of these 1131 * host controller still needs to use 1.8v vccq for supporting 1132 * DDR mode. 1133 * 1134 * So the sequence will be: 1135 * if (host and device can both support 1.2v IO) 1136 * use 1.2v IO; 1137 * else if (host and device can both support 1.8v IO) 1138 * use 1.8v IO; 1139 * so if host and device can only support 3.3v IO, this is the 1140 * last choice. 1141 * 1142 * WARNING: eMMC rules are NOT the same as SD DDR 1143 */ 1144 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 1145 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1146 if (!err) 1147 return 0; 1148 } 1149 1150 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V && 1151 host->caps & MMC_CAP_1_8V_DDR) 1152 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1153 1154 /* make sure vccq is 3.3v after switching disaster */ 1155 if (err) 1156 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1157 1158 return err; 1159 } 1160 1161 static int mmc_select_hs400(struct mmc_card *card) 1162 { 1163 struct mmc_host *host = card->host; 1164 unsigned int max_dtr; 1165 int err = 0; 1166 u8 val; 1167 1168 /* 1169 * HS400 mode requires 8-bit bus width 1170 */ 1171 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 1172 host->ios.bus_width == MMC_BUS_WIDTH_8)) 1173 return 0; 1174 1175 /* Switch card to HS mode */ 1176 val = EXT_CSD_TIMING_HS; 1177 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1178 EXT_CSD_HS_TIMING, val, 1179 card->ext_csd.generic_cmd6_time, 0, 1180 false, true, MMC_CMD_RETRIES); 1181 if (err) { 1182 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", 1183 mmc_hostname(host), err); 1184 return err; 1185 } 1186 1187 /* Prepare host to downgrade to HS timing */ 1188 if (host->ops->hs400_downgrade) 1189 host->ops->hs400_downgrade(host); 1190 1191 /* Set host controller to HS timing */ 1192 mmc_set_timing(host, MMC_TIMING_MMC_HS); 1193 1194 /* Reduce frequency to HS frequency */ 1195 max_dtr = card->ext_csd.hs_max_dtr; 1196 mmc_set_clock(host, max_dtr); 1197 1198 err = mmc_switch_status(card, true); 1199 if (err) 1200 goto out_err; 1201 1202 if (host->ops->hs400_prepare_ddr) 1203 host->ops->hs400_prepare_ddr(host); 1204 1205 /* Switch card to DDR */ 1206 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1207 EXT_CSD_BUS_WIDTH, 1208 EXT_CSD_DDR_BUS_WIDTH_8, 1209 card->ext_csd.generic_cmd6_time); 1210 if (err) { 1211 pr_err("%s: switch to bus width for hs400 failed, err:%d\n", 1212 mmc_hostname(host), err); 1213 return err; 1214 } 1215 1216 /* Switch card to HS400 */ 1217 val = EXT_CSD_TIMING_HS400 | 1218 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1219 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1220 EXT_CSD_HS_TIMING, val, 1221 card->ext_csd.generic_cmd6_time, 0, 1222 false, true, MMC_CMD_RETRIES); 1223 if (err) { 1224 pr_err("%s: switch to hs400 failed, err:%d\n", 1225 mmc_hostname(host), err); 1226 return err; 1227 } 1228 1229 /* Set host controller to HS400 timing and frequency */ 1230 mmc_set_timing(host, MMC_TIMING_MMC_HS400); 1231 mmc_set_bus_speed(card); 1232 1233 if (host->ops->execute_hs400_tuning) { 1234 mmc_retune_disable(host); 1235 err = host->ops->execute_hs400_tuning(host, card); 1236 mmc_retune_enable(host); 1237 if (err) 1238 goto out_err; 1239 } 1240 1241 if (host->ops->hs400_complete) 1242 host->ops->hs400_complete(host); 1243 1244 err = mmc_switch_status(card, true); 1245 if (err) 1246 goto out_err; 1247 1248 return 0; 1249 1250 out_err: 1251 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1252 __func__, err); 1253 return err; 1254 } 1255 1256 int mmc_hs200_to_hs400(struct mmc_card *card) 1257 { 1258 return mmc_select_hs400(card); 1259 } 1260 1261 int mmc_hs400_to_hs200(struct mmc_card *card) 1262 { 1263 struct mmc_host *host = card->host; 1264 unsigned int max_dtr; 1265 int err; 1266 u8 val; 1267 1268 /* Reduce frequency to HS */ 1269 max_dtr = card->ext_csd.hs_max_dtr; 1270 mmc_set_clock(host, max_dtr); 1271 1272 /* Switch HS400 to HS DDR */ 1273 val = EXT_CSD_TIMING_HS; 1274 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1275 val, card->ext_csd.generic_cmd6_time, 0, 1276 false, true, MMC_CMD_RETRIES); 1277 if (err) 1278 goto out_err; 1279 1280 if (host->ops->hs400_downgrade) 1281 host->ops->hs400_downgrade(host); 1282 1283 mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 1284 1285 err = mmc_switch_status(card, true); 1286 if (err) 1287 goto out_err; 1288 1289 /* Switch HS DDR to HS */ 1290 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 1291 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, 1292 0, false, true, MMC_CMD_RETRIES); 1293 if (err) 1294 goto out_err; 1295 1296 mmc_set_timing(host, MMC_TIMING_MMC_HS); 1297 1298 err = mmc_switch_status(card, true); 1299 if (err) 1300 goto out_err; 1301 1302 /* Switch HS to HS200 */ 1303 val = EXT_CSD_TIMING_HS200 | 1304 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1305 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1306 val, card->ext_csd.generic_cmd6_time, 0, 1307 false, true, MMC_CMD_RETRIES); 1308 if (err) 1309 goto out_err; 1310 1311 mmc_set_timing(host, MMC_TIMING_MMC_HS200); 1312 1313 /* 1314 * For HS200, CRC errors are not a reliable way to know the switch 1315 * failed. If there really is a problem, we would expect tuning will 1316 * fail and the result ends up the same. 1317 */ 1318 err = mmc_switch_status(card, false); 1319 if (err) 1320 goto out_err; 1321 1322 mmc_set_bus_speed(card); 1323 1324 /* Prepare tuning for HS400 mode. */ 1325 if (host->ops->prepare_hs400_tuning) 1326 host->ops->prepare_hs400_tuning(host, &host->ios); 1327 1328 return 0; 1329 1330 out_err: 1331 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1332 __func__, err); 1333 return err; 1334 } 1335 1336 static void mmc_select_driver_type(struct mmc_card *card) 1337 { 1338 int card_drv_type, drive_strength, drv_type = 0; 1339 int fixed_drv_type = card->host->fixed_drv_type; 1340 1341 card_drv_type = card->ext_csd.raw_driver_strength | 1342 mmc_driver_type_mask(0); 1343 1344 if (fixed_drv_type >= 0) 1345 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type) 1346 ? fixed_drv_type : 0; 1347 else 1348 drive_strength = mmc_select_drive_strength(card, 1349 card->ext_csd.hs200_max_dtr, 1350 card_drv_type, &drv_type); 1351 1352 card->drive_strength = drive_strength; 1353 1354 if (drv_type) 1355 mmc_set_driver_type(card->host, drv_type); 1356 } 1357 1358 static int mmc_select_hs400es(struct mmc_card *card) 1359 { 1360 struct mmc_host *host = card->host; 1361 int err = -EINVAL; 1362 u8 val; 1363 1364 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) 1365 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1366 1367 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) 1368 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1369 1370 /* If fails try again during next card power cycle */ 1371 if (err) 1372 goto out_err; 1373 1374 err = mmc_select_bus_width(card); 1375 if (err != MMC_BUS_WIDTH_8) { 1376 pr_err("%s: switch to 8bit bus width failed, err:%d\n", 1377 mmc_hostname(host), err); 1378 err = err < 0 ? err : -ENOTSUPP; 1379 goto out_err; 1380 } 1381 1382 /* Switch card to HS mode */ 1383 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1384 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 1385 card->ext_csd.generic_cmd6_time, 0, 1386 false, true, MMC_CMD_RETRIES); 1387 if (err) { 1388 pr_err("%s: switch to hs for hs400es failed, err:%d\n", 1389 mmc_hostname(host), err); 1390 goto out_err; 1391 } 1392 1393 /* 1394 * Bump to HS timing and frequency. Some cards don't handle 1395 * SEND_STATUS reliably at the initial frequency. 1396 */ 1397 mmc_set_timing(host, MMC_TIMING_MMC_HS); 1398 mmc_set_bus_speed(card); 1399 1400 err = mmc_switch_status(card, true); 1401 if (err) 1402 goto out_err; 1403 1404 /* Switch card to DDR with strobe bit */ 1405 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; 1406 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1407 EXT_CSD_BUS_WIDTH, 1408 val, 1409 card->ext_csd.generic_cmd6_time); 1410 if (err) { 1411 pr_err("%s: switch to bus width for hs400es failed, err:%d\n", 1412 mmc_hostname(host), err); 1413 goto out_err; 1414 } 1415 1416 mmc_select_driver_type(card); 1417 1418 /* Switch card to HS400 */ 1419 val = EXT_CSD_TIMING_HS400 | 1420 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1421 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1422 EXT_CSD_HS_TIMING, val, 1423 card->ext_csd.generic_cmd6_time, 0, 1424 false, true, MMC_CMD_RETRIES); 1425 if (err) { 1426 pr_err("%s: switch to hs400es failed, err:%d\n", 1427 mmc_hostname(host), err); 1428 goto out_err; 1429 } 1430 1431 /* Set host controller to HS400 timing and frequency */ 1432 mmc_set_timing(host, MMC_TIMING_MMC_HS400); 1433 1434 /* Controller enable enhanced strobe function */ 1435 host->ios.enhanced_strobe = true; 1436 if (host->ops->hs400_enhanced_strobe) 1437 host->ops->hs400_enhanced_strobe(host, &host->ios); 1438 1439 err = mmc_switch_status(card, true); 1440 if (err) 1441 goto out_err; 1442 1443 return 0; 1444 1445 out_err: 1446 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1447 __func__, err); 1448 return err; 1449 } 1450 1451 /* 1452 * For device supporting HS200 mode, the following sequence 1453 * should be done before executing the tuning process. 1454 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) 1455 * 2. switch to HS200 mode 1456 * 3. set the clock to > 52Mhz and <=200MHz 1457 */ 1458 static int mmc_select_hs200(struct mmc_card *card) 1459 { 1460 struct mmc_host *host = card->host; 1461 unsigned int old_timing, old_signal_voltage, old_clock; 1462 int err = -EINVAL; 1463 u8 val; 1464 1465 old_signal_voltage = host->ios.signal_voltage; 1466 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) 1467 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1468 1469 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) 1470 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1471 1472 /* If fails try again during next card power cycle */ 1473 if (err) 1474 return err; 1475 1476 mmc_select_driver_type(card); 1477 1478 /* 1479 * Set the bus width(4 or 8) with host's support and 1480 * switch to HS200 mode if bus width is set successfully. 1481 */ 1482 err = mmc_select_bus_width(card); 1483 if (err > 0) { 1484 val = EXT_CSD_TIMING_HS200 | 1485 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1486 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1487 EXT_CSD_HS_TIMING, val, 1488 card->ext_csd.generic_cmd6_time, 0, 1489 false, true, MMC_CMD_RETRIES); 1490 if (err) 1491 goto err; 1492 1493 /* 1494 * Bump to HS timing and frequency. Some cards don't handle 1495 * SEND_STATUS reliably at the initial frequency. 1496 * NB: We can't move to full (HS200) speeds until after we've 1497 * successfully switched over. 1498 */ 1499 old_timing = host->ios.timing; 1500 old_clock = host->ios.clock; 1501 mmc_set_timing(host, MMC_TIMING_MMC_HS200); 1502 mmc_set_clock(card->host, card->ext_csd.hs_max_dtr); 1503 1504 /* 1505 * For HS200, CRC errors are not a reliable way to know the 1506 * switch failed. If there really is a problem, we would expect 1507 * tuning will fail and the result ends up the same. 1508 */ 1509 err = mmc_switch_status(card, false); 1510 1511 /* 1512 * mmc_select_timing() assumes timing has not changed if 1513 * it is a switch error. 1514 */ 1515 if (err == -EBADMSG) { 1516 mmc_set_clock(host, old_clock); 1517 mmc_set_timing(host, old_timing); 1518 } 1519 } 1520 err: 1521 if (err) { 1522 /* fall back to the old signal voltage, if fails report error */ 1523 if (mmc_set_signal_voltage(host, old_signal_voltage)) 1524 err = -EIO; 1525 1526 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1527 __func__, err); 1528 } 1529 return err; 1530 } 1531 1532 /* 1533 * Activate High Speed, HS200 or HS400ES mode if supported. 1534 */ 1535 static int mmc_select_timing(struct mmc_card *card) 1536 { 1537 int err = 0; 1538 1539 if (!mmc_can_ext_csd(card)) 1540 goto bus_speed; 1541 1542 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) { 1543 err = mmc_select_hs400es(card); 1544 goto out; 1545 } 1546 1547 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) { 1548 err = mmc_select_hs200(card); 1549 if (err == -EBADMSG) 1550 card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200; 1551 else 1552 goto out; 1553 } 1554 1555 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) 1556 err = mmc_select_hs(card); 1557 1558 out: 1559 if (err && err != -EBADMSG) 1560 return err; 1561 1562 bus_speed: 1563 /* 1564 * Set the bus speed to the selected bus timing. 1565 * If timing is not selected, backward compatible is the default. 1566 */ 1567 mmc_set_bus_speed(card); 1568 return 0; 1569 } 1570 1571 /* 1572 * Execute tuning sequence to seek the proper bus operating 1573 * conditions for HS200 and HS400, which sends CMD21 to the device. 1574 */ 1575 static int mmc_hs200_tuning(struct mmc_card *card) 1576 { 1577 struct mmc_host *host = card->host; 1578 1579 /* 1580 * Timing should be adjusted to the HS400 target 1581 * operation frequency for tuning process 1582 */ 1583 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 1584 host->ios.bus_width == MMC_BUS_WIDTH_8) 1585 if (host->ops->prepare_hs400_tuning) 1586 host->ops->prepare_hs400_tuning(host, &host->ios); 1587 1588 return mmc_execute_tuning(card); 1589 } 1590 1591 /* 1592 * Handle the detection and initialisation of a card. 1593 * 1594 * In the case of a resume, "oldcard" will contain the card 1595 * we're trying to reinitialise. 1596 */ 1597 static int mmc_init_card(struct mmc_host *host, u32 ocr, 1598 struct mmc_card *oldcard) 1599 { 1600 struct mmc_card *card; 1601 int err; 1602 u32 cid[4]; 1603 u32 rocr; 1604 1605 WARN_ON(!host->claimed); 1606 1607 /* Set correct bus mode for MMC before attempting init */ 1608 if (!mmc_host_is_spi(host)) 1609 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 1610 1611 /* 1612 * Since we're changing the OCR value, we seem to 1613 * need to tell some cards to go back to the idle 1614 * state. We wait 1ms to give cards time to 1615 * respond. 1616 * mmc_go_idle is needed for eMMC that are asleep 1617 */ 1618 mmc_go_idle(host); 1619 1620 /* The extra bit indicates that we support high capacity */ 1621 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 1622 if (err) 1623 goto err; 1624 1625 /* 1626 * For SPI, enable CRC as appropriate. 1627 */ 1628 if (mmc_host_is_spi(host)) { 1629 err = mmc_spi_set_crc(host, use_spi_crc); 1630 if (err) 1631 goto err; 1632 } 1633 1634 /* 1635 * Fetch CID from card. 1636 */ 1637 err = mmc_send_cid(host, cid); 1638 if (err) 1639 goto err; 1640 1641 if (oldcard) { 1642 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1643 pr_debug("%s: Perhaps the card was replaced\n", 1644 mmc_hostname(host)); 1645 err = -ENOENT; 1646 goto err; 1647 } 1648 1649 card = oldcard; 1650 } else { 1651 /* 1652 * Allocate card structure. 1653 */ 1654 card = mmc_alloc_card(host, &mmc_type); 1655 if (IS_ERR(card)) { 1656 err = PTR_ERR(card); 1657 goto err; 1658 } 1659 1660 card->ocr = ocr; 1661 card->type = MMC_TYPE_MMC; 1662 card->rca = 1; 1663 memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 1664 } 1665 1666 /* 1667 * Call the optional HC's init_card function to handle quirks. 1668 */ 1669 if (host->ops->init_card) 1670 host->ops->init_card(host, card); 1671 1672 /* 1673 * For native busses: set card RCA and quit open drain mode. 1674 */ 1675 if (!mmc_host_is_spi(host)) { 1676 err = mmc_set_relative_addr(card); 1677 if (err) 1678 goto free_card; 1679 1680 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 1681 } 1682 1683 if (!oldcard) { 1684 /* 1685 * Fetch CSD from card. 1686 */ 1687 err = mmc_send_csd(card, card->raw_csd); 1688 if (err) 1689 goto free_card; 1690 1691 err = mmc_decode_csd(card); 1692 if (err) 1693 goto free_card; 1694 err = mmc_decode_cid(card); 1695 if (err) 1696 goto free_card; 1697 } 1698 1699 /* 1700 * handling only for cards supporting DSR and hosts requesting 1701 * DSR configuration 1702 */ 1703 if (card->csd.dsr_imp && host->dsr_req) 1704 mmc_set_dsr(host); 1705 1706 /* 1707 * Select card, as all following commands rely on that. 1708 */ 1709 if (!mmc_host_is_spi(host)) { 1710 err = mmc_select_card(card); 1711 if (err) 1712 goto free_card; 1713 } 1714 1715 if (!oldcard) { 1716 /* Read extended CSD. */ 1717 err = mmc_read_ext_csd(card); 1718 if (err) 1719 goto free_card; 1720 1721 /* 1722 * If doing byte addressing, check if required to do sector 1723 * addressing. Handle the case of <2GB cards needing sector 1724 * addressing. See section 8.1 JEDEC Standard JED84-A441; 1725 * ocr register has bit 30 set for sector addressing. 1726 */ 1727 if (rocr & BIT(30)) 1728 mmc_card_set_blockaddr(card); 1729 1730 /* Erase size depends on CSD and Extended CSD */ 1731 mmc_set_erase_size(card); 1732 } 1733 1734 /* 1735 * Reselect the card type since host caps could have been changed when 1736 * debugging even if the card is not new. 1737 */ 1738 mmc_select_card_type(card); 1739 1740 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ 1741 if (card->ext_csd.rev >= 3) { 1742 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1743 EXT_CSD_ERASE_GROUP_DEF, 1, 1744 card->ext_csd.generic_cmd6_time); 1745 1746 if (err && err != -EBADMSG) 1747 goto free_card; 1748 1749 if (err) { 1750 /* 1751 * Just disable enhanced area off & sz 1752 * will try to enable ERASE_GROUP_DEF 1753 * during next time reinit 1754 */ 1755 card->ext_csd.enhanced_area_offset = -EINVAL; 1756 card->ext_csd.enhanced_area_size = -EINVAL; 1757 } else { 1758 card->ext_csd.erase_group_def = 1; 1759 /* 1760 * enable ERASE_GRP_DEF successfully. 1761 * This will affect the erase size, so 1762 * here need to reset erase size 1763 */ 1764 mmc_set_erase_size(card); 1765 } 1766 } 1767 1768 /* 1769 * Ensure eMMC user default partition is enabled 1770 */ 1771 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 1772 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 1773 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 1774 card->ext_csd.part_config, 1775 card->ext_csd.part_time); 1776 if (err && err != -EBADMSG) 1777 goto free_card; 1778 } 1779 1780 /* 1781 * Enable power_off_notification byte in the ext_csd register 1782 */ 1783 if (card->ext_csd.rev >= 6) { 1784 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1785 EXT_CSD_POWER_OFF_NOTIFICATION, 1786 EXT_CSD_POWER_ON, 1787 card->ext_csd.generic_cmd6_time); 1788 if (err && err != -EBADMSG) 1789 goto free_card; 1790 1791 /* 1792 * The err can be -EBADMSG or 0, 1793 * so check for success and update the flag 1794 */ 1795 if (!err) 1796 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; 1797 } 1798 1799 /* set erase_arg */ 1800 if (mmc_can_discard(card)) 1801 card->erase_arg = MMC_DISCARD_ARG; 1802 else if (mmc_can_trim(card)) 1803 card->erase_arg = MMC_TRIM_ARG; 1804 else 1805 card->erase_arg = MMC_ERASE_ARG; 1806 1807 /* 1808 * Select timing interface 1809 */ 1810 err = mmc_select_timing(card); 1811 if (err) 1812 goto free_card; 1813 1814 if (mmc_card_hs200(card)) { 1815 host->doing_init_tune = 1; 1816 1817 err = mmc_hs200_tuning(card); 1818 if (!err) 1819 err = mmc_select_hs400(card); 1820 1821 host->doing_init_tune = 0; 1822 1823 if (err) 1824 goto free_card; 1825 1826 } else if (!mmc_card_hs400es(card)) { 1827 /* Select the desired bus width optionally */ 1828 err = mmc_select_bus_width(card); 1829 if (err > 0 && mmc_card_hs(card)) { 1830 err = mmc_select_hs_ddr(card); 1831 if (err) 1832 goto free_card; 1833 } 1834 } 1835 1836 /* 1837 * Choose the power class with selected bus interface 1838 */ 1839 mmc_select_powerclass(card); 1840 1841 /* 1842 * Enable HPI feature (if supported) 1843 */ 1844 if (card->ext_csd.hpi) { 1845 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1846 EXT_CSD_HPI_MGMT, 1, 1847 card->ext_csd.generic_cmd6_time); 1848 if (err && err != -EBADMSG) 1849 goto free_card; 1850 if (err) { 1851 pr_warn("%s: Enabling HPI failed\n", 1852 mmc_hostname(card->host)); 1853 card->ext_csd.hpi_en = 0; 1854 } else { 1855 card->ext_csd.hpi_en = 1; 1856 } 1857 } 1858 1859 /* 1860 * If cache size is higher than 0, this indicates the existence of cache 1861 * and it can be turned on. Note that some eMMCs from Micron has been 1862 * reported to need ~800 ms timeout, while enabling the cache after 1863 * sudden power failure tests. Let's extend the timeout to a minimum of 1864 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards. 1865 */ 1866 if (card->ext_csd.cache_size > 0) { 1867 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS; 1868 1869 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms); 1870 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1871 EXT_CSD_CACHE_CTRL, 1, timeout_ms); 1872 if (err && err != -EBADMSG) 1873 goto free_card; 1874 1875 /* 1876 * Only if no error, cache is turned on successfully. 1877 */ 1878 if (err) { 1879 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", 1880 mmc_hostname(card->host), err); 1881 card->ext_csd.cache_ctrl = 0; 1882 } else { 1883 card->ext_csd.cache_ctrl = 1; 1884 } 1885 } 1886 1887 /* 1888 * Enable Command Queue if supported. Note that Packed Commands cannot 1889 * be used with Command Queue. 1890 */ 1891 card->ext_csd.cmdq_en = false; 1892 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) { 1893 err = mmc_cmdq_enable(card); 1894 if (err && err != -EBADMSG) 1895 goto free_card; 1896 if (err) { 1897 pr_warn("%s: Enabling CMDQ failed\n", 1898 mmc_hostname(card->host)); 1899 card->ext_csd.cmdq_support = false; 1900 card->ext_csd.cmdq_depth = 0; 1901 } 1902 } 1903 /* 1904 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be 1905 * disabled for a time, so a flag is needed to indicate to re-enable the 1906 * Command Queue. 1907 */ 1908 card->reenable_cmdq = card->ext_csd.cmdq_en; 1909 1910 if (host->cqe_ops && !host->cqe_enabled) { 1911 err = host->cqe_ops->cqe_enable(host, card); 1912 if (!err) { 1913 host->cqe_enabled = true; 1914 1915 if (card->ext_csd.cmdq_en) { 1916 pr_info("%s: Command Queue Engine enabled\n", 1917 mmc_hostname(host)); 1918 } else { 1919 host->hsq_enabled = true; 1920 pr_info("%s: Host Software Queue enabled\n", 1921 mmc_hostname(host)); 1922 } 1923 } 1924 } 1925 1926 if (host->caps2 & MMC_CAP2_AVOID_3_3V && 1927 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1928 pr_err("%s: Host failed to negotiate down from 3.3V\n", 1929 mmc_hostname(host)); 1930 err = -EINVAL; 1931 goto free_card; 1932 } 1933 1934 if (!oldcard) 1935 host->card = card; 1936 1937 return 0; 1938 1939 free_card: 1940 if (!oldcard) 1941 mmc_remove_card(card); 1942 err: 1943 return err; 1944 } 1945 1946 static int mmc_can_sleep(struct mmc_card *card) 1947 { 1948 return card->ext_csd.rev >= 3; 1949 } 1950 1951 static int mmc_sleep_busy_cb(void *cb_data, bool *busy) 1952 { 1953 struct mmc_host *host = cb_data; 1954 1955 *busy = host->ops->card_busy(host); 1956 return 0; 1957 } 1958 1959 static int mmc_sleep(struct mmc_host *host) 1960 { 1961 struct mmc_command cmd = {}; 1962 struct mmc_card *card = host->card; 1963 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); 1964 bool use_r1b_resp; 1965 int err; 1966 1967 /* Re-tuning can't be done once the card is deselected */ 1968 mmc_retune_hold(host); 1969 1970 err = mmc_deselect_cards(host); 1971 if (err) 1972 goto out_release; 1973 1974 cmd.opcode = MMC_SLEEP_AWAKE; 1975 cmd.arg = card->rca << 16; 1976 cmd.arg |= 1 << 15; 1977 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms); 1978 1979 err = mmc_wait_for_cmd(host, &cmd, 0); 1980 if (err) 1981 goto out_release; 1982 1983 /* 1984 * If the host does not wait while the card signals busy, then we can 1985 * try to poll, but only if the host supports HW polling, as the 1986 * SEND_STATUS cmd is not allowed. If we can't poll, then we simply need 1987 * to wait the sleep/awake timeout. 1988 */ 1989 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp) 1990 goto out_release; 1991 1992 if (!host->ops->card_busy) { 1993 mmc_delay(timeout_ms); 1994 goto out_release; 1995 } 1996 1997 err = __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_sleep_busy_cb, host); 1998 1999 out_release: 2000 mmc_retune_release(host); 2001 return err; 2002 } 2003 2004 static int mmc_can_poweroff_notify(const struct mmc_card *card) 2005 { 2006 return card && 2007 mmc_card_mmc(card) && 2008 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); 2009 } 2010 2011 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) 2012 { 2013 unsigned int timeout = card->ext_csd.generic_cmd6_time; 2014 int err; 2015 2016 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ 2017 if (notify_type == EXT_CSD_POWER_OFF_LONG) 2018 timeout = card->ext_csd.power_off_longtime; 2019 2020 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 2021 EXT_CSD_POWER_OFF_NOTIFICATION, 2022 notify_type, timeout, 0, false, false, MMC_CMD_RETRIES); 2023 if (err) 2024 pr_err("%s: Power Off Notification timed out, %u\n", 2025 mmc_hostname(card->host), timeout); 2026 2027 /* Disable the power off notification after the switch operation. */ 2028 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; 2029 2030 return err; 2031 } 2032 2033 /* 2034 * Host is being removed. Free up the current card. 2035 */ 2036 static void mmc_remove(struct mmc_host *host) 2037 { 2038 mmc_remove_card(host->card); 2039 host->card = NULL; 2040 } 2041 2042 /* 2043 * Card detection - card is alive. 2044 */ 2045 static int mmc_alive(struct mmc_host *host) 2046 { 2047 return mmc_send_status(host->card, NULL); 2048 } 2049 2050 /* 2051 * Card detection callback from host. 2052 */ 2053 static void mmc_detect(struct mmc_host *host) 2054 { 2055 int err; 2056 2057 mmc_get_card(host->card, NULL); 2058 2059 /* 2060 * Just check if our card has been removed. 2061 */ 2062 err = _mmc_detect_card_removed(host); 2063 2064 mmc_put_card(host->card, NULL); 2065 2066 if (err) { 2067 mmc_remove(host); 2068 2069 mmc_claim_host(host); 2070 mmc_detach_bus(host); 2071 mmc_power_off(host); 2072 mmc_release_host(host); 2073 } 2074 } 2075 2076 static bool _mmc_cache_enabled(struct mmc_host *host) 2077 { 2078 return host->card->ext_csd.cache_size > 0 && 2079 host->card->ext_csd.cache_ctrl & 1; 2080 } 2081 2082 /* 2083 * Flush the internal cache of the eMMC to non-volatile storage. 2084 */ 2085 static int _mmc_flush_cache(struct mmc_host *host) 2086 { 2087 int err = 0; 2088 2089 if (mmc_card_broken_cache_flush(host->card) && !host->card->written_flag) 2090 return 0; 2091 2092 if (_mmc_cache_enabled(host)) { 2093 err = mmc_switch(host->card, EXT_CSD_CMD_SET_NORMAL, 2094 EXT_CSD_FLUSH_CACHE, 1, 2095 CACHE_FLUSH_TIMEOUT_MS); 2096 if (err) 2097 pr_err("%s: cache flush error %d\n", mmc_hostname(host), err); 2098 else 2099 host->card->written_flag = false; 2100 } 2101 2102 return err; 2103 } 2104 2105 static int _mmc_suspend(struct mmc_host *host, bool is_suspend) 2106 { 2107 int err = 0; 2108 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : 2109 EXT_CSD_POWER_OFF_LONG; 2110 2111 mmc_claim_host(host); 2112 2113 if (mmc_card_suspended(host->card)) 2114 goto out; 2115 2116 err = _mmc_flush_cache(host); 2117 if (err) 2118 goto out; 2119 2120 if (mmc_can_poweroff_notify(host->card) && 2121 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend || 2122 (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND))) 2123 err = mmc_poweroff_notify(host->card, notify_type); 2124 else if (mmc_can_sleep(host->card)) 2125 err = mmc_sleep(host); 2126 else if (!mmc_host_is_spi(host)) 2127 err = mmc_deselect_cards(host); 2128 2129 if (!err) { 2130 mmc_power_off(host); 2131 mmc_card_set_suspended(host->card); 2132 } 2133 out: 2134 mmc_release_host(host); 2135 return err; 2136 } 2137 2138 /* 2139 * Suspend callback 2140 */ 2141 static int mmc_suspend(struct mmc_host *host) 2142 { 2143 int err; 2144 2145 err = _mmc_suspend(host, true); 2146 if (!err) { 2147 pm_runtime_disable(&host->card->dev); 2148 pm_runtime_set_suspended(&host->card->dev); 2149 } 2150 2151 return err; 2152 } 2153 2154 /* 2155 * This function tries to determine if the same card is still present 2156 * and, if so, restore all state to it. 2157 */ 2158 static int _mmc_resume(struct mmc_host *host) 2159 { 2160 int err = 0; 2161 2162 mmc_claim_host(host); 2163 2164 if (!mmc_card_suspended(host->card)) 2165 goto out; 2166 2167 mmc_power_up(host, host->card->ocr); 2168 err = mmc_init_card(host, host->card->ocr, host->card); 2169 mmc_card_clr_suspended(host->card); 2170 2171 out: 2172 mmc_release_host(host); 2173 return err; 2174 } 2175 2176 /* 2177 * Shutdown callback 2178 */ 2179 static int mmc_shutdown(struct mmc_host *host) 2180 { 2181 int err = 0; 2182 2183 /* 2184 * In a specific case for poweroff notify, we need to resume the card 2185 * before we can shutdown it properly. 2186 */ 2187 if (mmc_can_poweroff_notify(host->card) && 2188 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) 2189 err = _mmc_resume(host); 2190 2191 if (!err) 2192 err = _mmc_suspend(host, false); 2193 2194 return err; 2195 } 2196 2197 /* 2198 * Callback for resume. 2199 */ 2200 static int mmc_resume(struct mmc_host *host) 2201 { 2202 pm_runtime_enable(&host->card->dev); 2203 return 0; 2204 } 2205 2206 /* 2207 * Callback for runtime_suspend. 2208 */ 2209 static int mmc_runtime_suspend(struct mmc_host *host) 2210 { 2211 int err; 2212 2213 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 2214 return 0; 2215 2216 err = _mmc_suspend(host, true); 2217 if (err) 2218 pr_err("%s: error %d doing aggressive suspend\n", 2219 mmc_hostname(host), err); 2220 2221 return err; 2222 } 2223 2224 /* 2225 * Callback for runtime_resume. 2226 */ 2227 static int mmc_runtime_resume(struct mmc_host *host) 2228 { 2229 int err; 2230 2231 err = _mmc_resume(host); 2232 if (err && err != -ENOMEDIUM) 2233 pr_err("%s: error %d doing runtime resume\n", 2234 mmc_hostname(host), err); 2235 2236 return 0; 2237 } 2238 2239 static int mmc_can_reset(struct mmc_card *card) 2240 { 2241 u8 rst_n_function; 2242 2243 rst_n_function = card->ext_csd.rst_n_function; 2244 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) 2245 return 0; 2246 return 1; 2247 } 2248 2249 static int _mmc_hw_reset(struct mmc_host *host) 2250 { 2251 struct mmc_card *card = host->card; 2252 2253 /* 2254 * In the case of recovery, we can't expect flushing the cache to work 2255 * always, but we have a go and ignore errors. 2256 */ 2257 _mmc_flush_cache(host); 2258 2259 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->card_hw_reset && 2260 mmc_can_reset(card)) { 2261 /* If the card accept RST_n signal, send it. */ 2262 mmc_set_clock(host, host->f_init); 2263 host->ops->card_hw_reset(host); 2264 /* Set initial state and call mmc_set_ios */ 2265 mmc_set_initial_state(host); 2266 } else { 2267 /* Do a brute force power cycle */ 2268 mmc_power_cycle(host, card->ocr); 2269 mmc_pwrseq_reset(host); 2270 } 2271 return mmc_init_card(host, card->ocr, card); 2272 } 2273 2274 static const struct mmc_bus_ops mmc_ops = { 2275 .remove = mmc_remove, 2276 .detect = mmc_detect, 2277 .suspend = mmc_suspend, 2278 .resume = mmc_resume, 2279 .runtime_suspend = mmc_runtime_suspend, 2280 .runtime_resume = mmc_runtime_resume, 2281 .alive = mmc_alive, 2282 .shutdown = mmc_shutdown, 2283 .hw_reset = _mmc_hw_reset, 2284 .cache_enabled = _mmc_cache_enabled, 2285 .flush_cache = _mmc_flush_cache, 2286 }; 2287 2288 /* 2289 * Starting point for MMC card init. 2290 */ 2291 int mmc_attach_mmc(struct mmc_host *host) 2292 { 2293 int err; 2294 u32 ocr, rocr; 2295 2296 WARN_ON(!host->claimed); 2297 2298 /* Set correct bus mode for MMC before attempting attach */ 2299 if (!mmc_host_is_spi(host)) 2300 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 2301 2302 err = mmc_send_op_cond(host, 0, &ocr); 2303 if (err) 2304 return err; 2305 2306 mmc_attach_bus(host, &mmc_ops); 2307 if (host->ocr_avail_mmc) 2308 host->ocr_avail = host->ocr_avail_mmc; 2309 2310 /* 2311 * We need to get OCR a different way for SPI. 2312 */ 2313 if (mmc_host_is_spi(host)) { 2314 err = mmc_spi_read_ocr(host, 1, &ocr); 2315 if (err) 2316 goto err; 2317 } 2318 2319 rocr = mmc_select_voltage(host, ocr); 2320 2321 /* 2322 * Can we support the voltage of the card? 2323 */ 2324 if (!rocr) { 2325 err = -EINVAL; 2326 goto err; 2327 } 2328 2329 /* 2330 * Detect and init the card. 2331 */ 2332 err = mmc_init_card(host, rocr, NULL); 2333 if (err) 2334 goto err; 2335 2336 mmc_release_host(host); 2337 err = mmc_add_card(host->card); 2338 if (err) 2339 goto remove_card; 2340 2341 mmc_claim_host(host); 2342 return 0; 2343 2344 remove_card: 2345 mmc_remove_card(host->card); 2346 mmc_claim_host(host); 2347 host->card = NULL; 2348 err: 2349 mmc_detach_bus(host); 2350 2351 pr_err("%s: error %d whilst initialising MMC card\n", 2352 mmc_hostname(host), err); 2353 2354 return err; 2355 } 2356