1 /* 2 * linux/drivers/mmc/core/mmc.c 3 * 4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/err.h> 14 #include <linux/of.h> 15 #include <linux/slab.h> 16 #include <linux/stat.h> 17 #include <linux/pm_runtime.h> 18 19 #include <linux/mmc/host.h> 20 #include <linux/mmc/card.h> 21 #include <linux/mmc/mmc.h> 22 23 #include "core.h" 24 #include "card.h" 25 #include "host.h" 26 #include "bus.h" 27 #include "mmc_ops.h" 28 #include "quirks.h" 29 #include "sd_ops.h" 30 #include "pwrseq.h" 31 32 #define DEFAULT_CMD6_TIMEOUT_MS 500 33 34 static const unsigned int tran_exp[] = { 35 10000, 100000, 1000000, 10000000, 36 0, 0, 0, 0 37 }; 38 39 static const unsigned char tran_mant[] = { 40 0, 10, 12, 13, 15, 20, 25, 30, 41 35, 40, 45, 50, 55, 60, 70, 80, 42 }; 43 44 static const unsigned int taac_exp[] = { 45 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 46 }; 47 48 static const unsigned int taac_mant[] = { 49 0, 10, 12, 13, 15, 20, 25, 30, 50 35, 40, 45, 50, 55, 60, 70, 80, 51 }; 52 53 #define UNSTUFF_BITS(resp,start,size) \ 54 ({ \ 55 const int __size = size; \ 56 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 57 const int __off = 3 - ((start) / 32); \ 58 const int __shft = (start) & 31; \ 59 u32 __res; \ 60 \ 61 __res = resp[__off] >> __shft; \ 62 if (__size + __shft > 32) \ 63 __res |= resp[__off-1] << ((32 - __shft) % 32); \ 64 __res & __mask; \ 65 }) 66 67 /* 68 * Given the decoded CSD structure, decode the raw CID to our CID structure. 69 */ 70 static int mmc_decode_cid(struct mmc_card *card) 71 { 72 u32 *resp = card->raw_cid; 73 74 /* 75 * The selection of the format here is based upon published 76 * specs from sandisk and from what people have reported. 77 */ 78 switch (card->csd.mmca_vsn) { 79 case 0: /* MMC v1.0 - v1.2 */ 80 case 1: /* MMC v1.4 */ 81 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 82 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 83 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 84 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 85 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 86 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 87 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 88 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 89 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 90 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 91 card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 92 card->cid.month = UNSTUFF_BITS(resp, 12, 4); 93 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 94 break; 95 96 case 2: /* MMC v2.0 - v2.2 */ 97 case 3: /* MMC v3.1 - v3.3 */ 98 case 4: /* MMC v4 */ 99 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 100 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 101 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 102 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 103 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 104 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 105 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 106 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 107 card->cid.prv = UNSTUFF_BITS(resp, 48, 8); 108 card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 109 card->cid.month = UNSTUFF_BITS(resp, 12, 4); 110 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 111 break; 112 113 default: 114 pr_err("%s: card has unknown MMCA version %d\n", 115 mmc_hostname(card->host), card->csd.mmca_vsn); 116 return -EINVAL; 117 } 118 119 return 0; 120 } 121 122 static void mmc_set_erase_size(struct mmc_card *card) 123 { 124 if (card->ext_csd.erase_group_def & 1) 125 card->erase_size = card->ext_csd.hc_erase_size; 126 else 127 card->erase_size = card->csd.erase_size; 128 129 mmc_init_erase(card); 130 } 131 132 /* 133 * Given a 128-bit response, decode to our card CSD structure. 134 */ 135 static int mmc_decode_csd(struct mmc_card *card) 136 { 137 struct mmc_csd *csd = &card->csd; 138 unsigned int e, m, a, b; 139 u32 *resp = card->raw_csd; 140 141 /* 142 * We only understand CSD structure v1.1 and v1.2. 143 * v1.2 has extra information in bits 15, 11 and 10. 144 * We also support eMMC v4.4 & v4.41. 145 */ 146 csd->structure = UNSTUFF_BITS(resp, 126, 2); 147 if (csd->structure == 0) { 148 pr_err("%s: unrecognised CSD structure version %d\n", 149 mmc_hostname(card->host), csd->structure); 150 return -EINVAL; 151 } 152 153 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 154 m = UNSTUFF_BITS(resp, 115, 4); 155 e = UNSTUFF_BITS(resp, 112, 3); 156 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; 157 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 158 159 m = UNSTUFF_BITS(resp, 99, 4); 160 e = UNSTUFF_BITS(resp, 96, 3); 161 csd->max_dtr = tran_exp[e] * tran_mant[m]; 162 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 163 164 e = UNSTUFF_BITS(resp, 47, 3); 165 m = UNSTUFF_BITS(resp, 62, 12); 166 csd->capacity = (1 + m) << (e + 2); 167 168 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 169 csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 170 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 171 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 172 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 173 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 174 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 175 csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 176 177 if (csd->write_blkbits >= 9) { 178 a = UNSTUFF_BITS(resp, 42, 5); 179 b = UNSTUFF_BITS(resp, 37, 5); 180 csd->erase_size = (a + 1) * (b + 1); 181 csd->erase_size <<= csd->write_blkbits - 9; 182 } 183 184 return 0; 185 } 186 187 static void mmc_select_card_type(struct mmc_card *card) 188 { 189 struct mmc_host *host = card->host; 190 u8 card_type = card->ext_csd.raw_card_type; 191 u32 caps = host->caps, caps2 = host->caps2; 192 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; 193 unsigned int avail_type = 0; 194 195 if (caps & MMC_CAP_MMC_HIGHSPEED && 196 card_type & EXT_CSD_CARD_TYPE_HS_26) { 197 hs_max_dtr = MMC_HIGH_26_MAX_DTR; 198 avail_type |= EXT_CSD_CARD_TYPE_HS_26; 199 } 200 201 if (caps & MMC_CAP_MMC_HIGHSPEED && 202 card_type & EXT_CSD_CARD_TYPE_HS_52) { 203 hs_max_dtr = MMC_HIGH_52_MAX_DTR; 204 avail_type |= EXT_CSD_CARD_TYPE_HS_52; 205 } 206 207 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) && 208 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { 209 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 210 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; 211 } 212 213 if (caps & MMC_CAP_1_2V_DDR && 214 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 215 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 216 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; 217 } 218 219 if (caps2 & MMC_CAP2_HS200_1_8V_SDR && 220 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { 221 hs200_max_dtr = MMC_HS200_MAX_DTR; 222 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; 223 } 224 225 if (caps2 & MMC_CAP2_HS200_1_2V_SDR && 226 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { 227 hs200_max_dtr = MMC_HS200_MAX_DTR; 228 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; 229 } 230 231 if (caps2 & MMC_CAP2_HS400_1_8V && 232 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { 233 hs200_max_dtr = MMC_HS200_MAX_DTR; 234 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; 235 } 236 237 if (caps2 & MMC_CAP2_HS400_1_2V && 238 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { 239 hs200_max_dtr = MMC_HS200_MAX_DTR; 240 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; 241 } 242 243 if ((caps2 & MMC_CAP2_HS400_ES) && 244 card->ext_csd.strobe_support && 245 (avail_type & EXT_CSD_CARD_TYPE_HS400)) 246 avail_type |= EXT_CSD_CARD_TYPE_HS400ES; 247 248 card->ext_csd.hs_max_dtr = hs_max_dtr; 249 card->ext_csd.hs200_max_dtr = hs200_max_dtr; 250 card->mmc_avail_type = avail_type; 251 } 252 253 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) 254 { 255 u8 hc_erase_grp_sz, hc_wp_grp_sz; 256 257 /* 258 * Disable these attributes by default 259 */ 260 card->ext_csd.enhanced_area_offset = -EINVAL; 261 card->ext_csd.enhanced_area_size = -EINVAL; 262 263 /* 264 * Enhanced area feature support -- check whether the eMMC 265 * card has the Enhanced area enabled. If so, export enhanced 266 * area offset and size to user by adding sysfs interface. 267 */ 268 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 269 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 270 if (card->ext_csd.partition_setting_completed) { 271 hc_erase_grp_sz = 272 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 273 hc_wp_grp_sz = 274 ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 275 276 /* 277 * calculate the enhanced data area offset, in bytes 278 */ 279 card->ext_csd.enhanced_area_offset = 280 (((unsigned long long)ext_csd[139]) << 24) + 281 (((unsigned long long)ext_csd[138]) << 16) + 282 (((unsigned long long)ext_csd[137]) << 8) + 283 (((unsigned long long)ext_csd[136])); 284 if (mmc_card_blockaddr(card)) 285 card->ext_csd.enhanced_area_offset <<= 9; 286 /* 287 * calculate the enhanced data area size, in kilobytes 288 */ 289 card->ext_csd.enhanced_area_size = 290 (ext_csd[142] << 16) + (ext_csd[141] << 8) + 291 ext_csd[140]; 292 card->ext_csd.enhanced_area_size *= 293 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 294 card->ext_csd.enhanced_area_size <<= 9; 295 } else { 296 pr_warn("%s: defines enhanced area without partition setting complete\n", 297 mmc_hostname(card->host)); 298 } 299 } 300 } 301 302 static void mmc_part_add(struct mmc_card *card, unsigned int size, 303 unsigned int part_cfg, char *name, int idx, bool ro, 304 int area_type) 305 { 306 card->part[card->nr_parts].size = size; 307 card->part[card->nr_parts].part_cfg = part_cfg; 308 sprintf(card->part[card->nr_parts].name, name, idx); 309 card->part[card->nr_parts].force_ro = ro; 310 card->part[card->nr_parts].area_type = area_type; 311 card->nr_parts++; 312 } 313 314 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) 315 { 316 int idx; 317 u8 hc_erase_grp_sz, hc_wp_grp_sz; 318 unsigned int part_size; 319 320 /* 321 * General purpose partition feature support -- 322 * If ext_csd has the size of general purpose partitions, 323 * set size, part_cfg, partition name in mmc_part. 324 */ 325 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 326 EXT_CSD_PART_SUPPORT_PART_EN) { 327 hc_erase_grp_sz = 328 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 329 hc_wp_grp_sz = 330 ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 331 332 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { 333 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && 334 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && 335 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) 336 continue; 337 if (card->ext_csd.partition_setting_completed == 0) { 338 pr_warn("%s: has partition size defined without partition complete\n", 339 mmc_hostname(card->host)); 340 break; 341 } 342 part_size = 343 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] 344 << 16) + 345 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] 346 << 8) + 347 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; 348 part_size *= (size_t)(hc_erase_grp_sz * 349 hc_wp_grp_sz); 350 mmc_part_add(card, part_size << 19, 351 EXT_CSD_PART_CONFIG_ACC_GP0 + idx, 352 "gp%d", idx, false, 353 MMC_BLK_DATA_AREA_GP); 354 } 355 } 356 } 357 358 /* Minimum partition switch timeout in milliseconds */ 359 #define MMC_MIN_PART_SWITCH_TIME 300 360 361 /* 362 * Decode extended CSD. 363 */ 364 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) 365 { 366 int err = 0, idx; 367 unsigned int part_size; 368 struct device_node *np; 369 bool broken_hpi = false; 370 371 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 372 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 373 if (card->csd.structure == 3) { 374 if (card->ext_csd.raw_ext_csd_structure > 2) { 375 pr_err("%s: unrecognised EXT_CSD structure " 376 "version %d\n", mmc_hostname(card->host), 377 card->ext_csd.raw_ext_csd_structure); 378 err = -EINVAL; 379 goto out; 380 } 381 } 382 383 np = mmc_of_find_child_device(card->host, 0); 384 if (np && of_device_is_compatible(np, "mmc-card")) 385 broken_hpi = of_property_read_bool(np, "broken-hpi"); 386 of_node_put(np); 387 388 /* 389 * The EXT_CSD format is meant to be forward compatible. As long 390 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV 391 * are authorized, see JEDEC JESD84-B50 section B.8. 392 */ 393 card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 394 395 /* fixup device after ext_csd revision field is updated */ 396 mmc_fixup_device(card, mmc_ext_csd_fixups); 397 398 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 399 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 400 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 401 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 402 if (card->ext_csd.rev >= 2) { 403 card->ext_csd.sectors = 404 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 405 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 406 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 407 ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 408 409 /* Cards with density > 2GiB are sector addressed */ 410 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 411 mmc_card_set_blockaddr(card); 412 } 413 414 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; 415 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 416 mmc_select_card_type(card); 417 418 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 419 card->ext_csd.raw_erase_timeout_mult = 420 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 421 card->ext_csd.raw_hc_erase_grp_size = 422 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 423 if (card->ext_csd.rev >= 3) { 424 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 425 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 426 427 /* EXT_CSD value is in units of 10ms, but we store in ms */ 428 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 429 /* Some eMMC set the value too low so set a minimum */ 430 if (card->ext_csd.part_time && 431 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) 432 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; 433 434 /* Sleep / awake timeout in 100ns units */ 435 if (sa_shift > 0 && sa_shift <= 0x17) 436 card->ext_csd.sa_timeout = 437 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 438 card->ext_csd.erase_group_def = 439 ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 440 card->ext_csd.hc_erase_timeout = 300 * 441 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 442 card->ext_csd.hc_erase_size = 443 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 444 445 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 446 447 /* 448 * There are two boot regions of equal size, defined in 449 * multiples of 128K. 450 */ 451 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 452 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 453 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 454 mmc_part_add(card, part_size, 455 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 456 "boot%d", idx, true, 457 MMC_BLK_DATA_AREA_BOOT); 458 } 459 } 460 } 461 462 card->ext_csd.raw_hc_erase_gap_size = 463 ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 464 card->ext_csd.raw_sec_trim_mult = 465 ext_csd[EXT_CSD_SEC_TRIM_MULT]; 466 card->ext_csd.raw_sec_erase_mult = 467 ext_csd[EXT_CSD_SEC_ERASE_MULT]; 468 card->ext_csd.raw_sec_feature_support = 469 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 470 card->ext_csd.raw_trim_mult = 471 ext_csd[EXT_CSD_TRIM_MULT]; 472 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 473 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; 474 if (card->ext_csd.rev >= 4) { 475 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & 476 EXT_CSD_PART_SETTING_COMPLETED) 477 card->ext_csd.partition_setting_completed = 1; 478 else 479 card->ext_csd.partition_setting_completed = 0; 480 481 mmc_manage_enhanced_area(card, ext_csd); 482 483 mmc_manage_gp_partitions(card, ext_csd); 484 485 card->ext_csd.sec_trim_mult = 486 ext_csd[EXT_CSD_SEC_TRIM_MULT]; 487 card->ext_csd.sec_erase_mult = 488 ext_csd[EXT_CSD_SEC_ERASE_MULT]; 489 card->ext_csd.sec_feature_support = 490 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 491 card->ext_csd.trim_timeout = 300 * 492 ext_csd[EXT_CSD_TRIM_MULT]; 493 494 /* 495 * Note that the call to mmc_part_add above defaults to read 496 * only. If this default assumption is changed, the call must 497 * take into account the value of boot_locked below. 498 */ 499 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; 500 card->ext_csd.boot_ro_lockable = true; 501 502 /* Save power class values */ 503 card->ext_csd.raw_pwr_cl_52_195 = 504 ext_csd[EXT_CSD_PWR_CL_52_195]; 505 card->ext_csd.raw_pwr_cl_26_195 = 506 ext_csd[EXT_CSD_PWR_CL_26_195]; 507 card->ext_csd.raw_pwr_cl_52_360 = 508 ext_csd[EXT_CSD_PWR_CL_52_360]; 509 card->ext_csd.raw_pwr_cl_26_360 = 510 ext_csd[EXT_CSD_PWR_CL_26_360]; 511 card->ext_csd.raw_pwr_cl_200_195 = 512 ext_csd[EXT_CSD_PWR_CL_200_195]; 513 card->ext_csd.raw_pwr_cl_200_360 = 514 ext_csd[EXT_CSD_PWR_CL_200_360]; 515 card->ext_csd.raw_pwr_cl_ddr_52_195 = 516 ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; 517 card->ext_csd.raw_pwr_cl_ddr_52_360 = 518 ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; 519 card->ext_csd.raw_pwr_cl_ddr_200_360 = 520 ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; 521 } 522 523 if (card->ext_csd.rev >= 5) { 524 /* Adjust production date as per JEDEC JESD84-B451 */ 525 if (card->cid.year < 2010) 526 card->cid.year += 16; 527 528 /* check whether the eMMC card supports BKOPS */ 529 if (!mmc_card_broken_hpi(card) && 530 ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { 531 card->ext_csd.bkops = 1; 532 card->ext_csd.man_bkops_en = 533 (ext_csd[EXT_CSD_BKOPS_EN] & 534 EXT_CSD_MANUAL_BKOPS_MASK); 535 card->ext_csd.raw_bkops_status = 536 ext_csd[EXT_CSD_BKOPS_STATUS]; 537 if (card->ext_csd.man_bkops_en) 538 pr_debug("%s: MAN_BKOPS_EN bit is set\n", 539 mmc_hostname(card->host)); 540 card->ext_csd.auto_bkops_en = 541 (ext_csd[EXT_CSD_BKOPS_EN] & 542 EXT_CSD_AUTO_BKOPS_MASK); 543 if (card->ext_csd.auto_bkops_en) 544 pr_debug("%s: AUTO_BKOPS_EN bit is set\n", 545 mmc_hostname(card->host)); 546 } 547 548 /* check whether the eMMC card supports HPI */ 549 if (!mmc_card_broken_hpi(card) && 550 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { 551 card->ext_csd.hpi = 1; 552 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 553 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 554 else 555 card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 556 /* 557 * Indicate the maximum timeout to close 558 * a command interrupted by HPI 559 */ 560 card->ext_csd.out_of_int_time = 561 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 562 } 563 564 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 565 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 566 567 /* 568 * RPMB regions are defined in multiples of 128K. 569 */ 570 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; 571 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { 572 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, 573 EXT_CSD_PART_CONFIG_ACC_RPMB, 574 "rpmb", 0, false, 575 MMC_BLK_DATA_AREA_RPMB); 576 } 577 } 578 579 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 580 if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 581 card->erased_byte = 0xFF; 582 else 583 card->erased_byte = 0x0; 584 585 /* eMMC v4.5 or later */ 586 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS; 587 if (card->ext_csd.rev >= 6) { 588 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 589 590 card->ext_csd.generic_cmd6_time = 10 * 591 ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 592 card->ext_csd.power_off_longtime = 10 * 593 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 594 595 card->ext_csd.cache_size = 596 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 597 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 598 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 599 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 600 601 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) 602 card->ext_csd.data_sector_size = 4096; 603 else 604 card->ext_csd.data_sector_size = 512; 605 606 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && 607 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { 608 card->ext_csd.data_tag_unit_size = 609 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * 610 (card->ext_csd.data_sector_size); 611 } else { 612 card->ext_csd.data_tag_unit_size = 0; 613 } 614 615 card->ext_csd.max_packed_writes = 616 ext_csd[EXT_CSD_MAX_PACKED_WRITES]; 617 card->ext_csd.max_packed_reads = 618 ext_csd[EXT_CSD_MAX_PACKED_READS]; 619 } else { 620 card->ext_csd.data_sector_size = 512; 621 } 622 623 /* eMMC v5 or later */ 624 if (card->ext_csd.rev >= 7) { 625 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], 626 MMC_FIRMWARE_LEN); 627 card->ext_csd.ffu_capable = 628 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && 629 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); 630 631 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; 632 card->ext_csd.device_life_time_est_typ_a = 633 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]; 634 card->ext_csd.device_life_time_est_typ_b = 635 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]; 636 } 637 638 /* eMMC v5.1 or later */ 639 if (card->ext_csd.rev >= 8) { 640 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] & 641 EXT_CSD_CMDQ_SUPPORTED; 642 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] & 643 EXT_CSD_CMDQ_DEPTH_MASK) + 1; 644 /* Exclude inefficiently small queue depths */ 645 if (card->ext_csd.cmdq_depth <= 2) { 646 card->ext_csd.cmdq_support = false; 647 card->ext_csd.cmdq_depth = 0; 648 } 649 if (card->ext_csd.cmdq_support) { 650 pr_debug("%s: Command Queue supported depth %u\n", 651 mmc_hostname(card->host), 652 card->ext_csd.cmdq_depth); 653 } 654 } 655 out: 656 return err; 657 } 658 659 static int mmc_read_ext_csd(struct mmc_card *card) 660 { 661 u8 *ext_csd; 662 int err; 663 664 if (!mmc_can_ext_csd(card)) 665 return 0; 666 667 err = mmc_get_ext_csd(card, &ext_csd); 668 if (err) { 669 /* If the host or the card can't do the switch, 670 * fail more gracefully. */ 671 if ((err != -EINVAL) 672 && (err != -ENOSYS) 673 && (err != -EFAULT)) 674 return err; 675 676 /* 677 * High capacity cards should have this "magic" size 678 * stored in their CSD. 679 */ 680 if (card->csd.capacity == (4096 * 512)) { 681 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", 682 mmc_hostname(card->host)); 683 } else { 684 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", 685 mmc_hostname(card->host)); 686 err = 0; 687 } 688 689 return err; 690 } 691 692 err = mmc_decode_ext_csd(card, ext_csd); 693 kfree(ext_csd); 694 return err; 695 } 696 697 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 698 { 699 u8 *bw_ext_csd; 700 int err; 701 702 if (bus_width == MMC_BUS_WIDTH_1) 703 return 0; 704 705 err = mmc_get_ext_csd(card, &bw_ext_csd); 706 if (err) 707 return err; 708 709 /* only compare read only fields */ 710 err = !((card->ext_csd.raw_partition_support == 711 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 712 (card->ext_csd.raw_erased_mem_count == 713 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 714 (card->ext_csd.rev == 715 bw_ext_csd[EXT_CSD_REV]) && 716 (card->ext_csd.raw_ext_csd_structure == 717 bw_ext_csd[EXT_CSD_STRUCTURE]) && 718 (card->ext_csd.raw_card_type == 719 bw_ext_csd[EXT_CSD_CARD_TYPE]) && 720 (card->ext_csd.raw_s_a_timeout == 721 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 722 (card->ext_csd.raw_hc_erase_gap_size == 723 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 724 (card->ext_csd.raw_erase_timeout_mult == 725 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 726 (card->ext_csd.raw_hc_erase_grp_size == 727 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 728 (card->ext_csd.raw_sec_trim_mult == 729 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 730 (card->ext_csd.raw_sec_erase_mult == 731 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 732 (card->ext_csd.raw_sec_feature_support == 733 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 734 (card->ext_csd.raw_trim_mult == 735 bw_ext_csd[EXT_CSD_TRIM_MULT]) && 736 (card->ext_csd.raw_sectors[0] == 737 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 738 (card->ext_csd.raw_sectors[1] == 739 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 740 (card->ext_csd.raw_sectors[2] == 741 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 742 (card->ext_csd.raw_sectors[3] == 743 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && 744 (card->ext_csd.raw_pwr_cl_52_195 == 745 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && 746 (card->ext_csd.raw_pwr_cl_26_195 == 747 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && 748 (card->ext_csd.raw_pwr_cl_52_360 == 749 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && 750 (card->ext_csd.raw_pwr_cl_26_360 == 751 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && 752 (card->ext_csd.raw_pwr_cl_200_195 == 753 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && 754 (card->ext_csd.raw_pwr_cl_200_360 == 755 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && 756 (card->ext_csd.raw_pwr_cl_ddr_52_195 == 757 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && 758 (card->ext_csd.raw_pwr_cl_ddr_52_360 == 759 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && 760 (card->ext_csd.raw_pwr_cl_ddr_200_360 == 761 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); 762 763 if (err) 764 err = -EINVAL; 765 766 kfree(bw_ext_csd); 767 return err; 768 } 769 770 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 771 card->raw_cid[2], card->raw_cid[3]); 772 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 773 card->raw_csd[2], card->raw_csd[3]); 774 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 775 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 776 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 777 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); 778 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 779 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 780 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 781 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 782 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); 783 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev); 784 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info); 785 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n", 786 card->ext_csd.device_life_time_est_typ_a, 787 card->ext_csd.device_life_time_est_typ_b); 788 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 789 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 790 card->ext_csd.enhanced_area_offset); 791 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 792 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); 793 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); 794 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); 795 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); 796 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en); 797 798 static ssize_t mmc_fwrev_show(struct device *dev, 799 struct device_attribute *attr, 800 char *buf) 801 { 802 struct mmc_card *card = mmc_dev_to_card(dev); 803 804 if (card->ext_csd.rev < 7) { 805 return sprintf(buf, "0x%x\n", card->cid.fwrev); 806 } else { 807 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, 808 card->ext_csd.fwrev); 809 } 810 } 811 812 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); 813 814 static ssize_t mmc_dsr_show(struct device *dev, 815 struct device_attribute *attr, 816 char *buf) 817 { 818 struct mmc_card *card = mmc_dev_to_card(dev); 819 struct mmc_host *host = card->host; 820 821 if (card->csd.dsr_imp && host->dsr_req) 822 return sprintf(buf, "0x%x\n", host->dsr); 823 else 824 /* return default DSR value */ 825 return sprintf(buf, "0x%x\n", 0x404); 826 } 827 828 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 829 830 static struct attribute *mmc_std_attrs[] = { 831 &dev_attr_cid.attr, 832 &dev_attr_csd.attr, 833 &dev_attr_date.attr, 834 &dev_attr_erase_size.attr, 835 &dev_attr_preferred_erase_size.attr, 836 &dev_attr_fwrev.attr, 837 &dev_attr_ffu_capable.attr, 838 &dev_attr_hwrev.attr, 839 &dev_attr_manfid.attr, 840 &dev_attr_name.attr, 841 &dev_attr_oemid.attr, 842 &dev_attr_prv.attr, 843 &dev_attr_rev.attr, 844 &dev_attr_pre_eol_info.attr, 845 &dev_attr_life_time.attr, 846 &dev_attr_serial.attr, 847 &dev_attr_enhanced_area_offset.attr, 848 &dev_attr_enhanced_area_size.attr, 849 &dev_attr_raw_rpmb_size_mult.attr, 850 &dev_attr_rel_sectors.attr, 851 &dev_attr_ocr.attr, 852 &dev_attr_rca.attr, 853 &dev_attr_dsr.attr, 854 &dev_attr_cmdq_en.attr, 855 NULL, 856 }; 857 ATTRIBUTE_GROUPS(mmc_std); 858 859 static struct device_type mmc_type = { 860 .groups = mmc_std_groups, 861 }; 862 863 /* 864 * Select the PowerClass for the current bus width 865 * If power class is defined for 4/8 bit bus in the 866 * extended CSD register, select it by executing the 867 * mmc_switch command. 868 */ 869 static int __mmc_select_powerclass(struct mmc_card *card, 870 unsigned int bus_width) 871 { 872 struct mmc_host *host = card->host; 873 struct mmc_ext_csd *ext_csd = &card->ext_csd; 874 unsigned int pwrclass_val = 0; 875 int err = 0; 876 877 switch (1 << host->ios.vdd) { 878 case MMC_VDD_165_195: 879 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 880 pwrclass_val = ext_csd->raw_pwr_cl_26_195; 881 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 882 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 883 ext_csd->raw_pwr_cl_52_195 : 884 ext_csd->raw_pwr_cl_ddr_52_195; 885 else if (host->ios.clock <= MMC_HS200_MAX_DTR) 886 pwrclass_val = ext_csd->raw_pwr_cl_200_195; 887 break; 888 case MMC_VDD_27_28: 889 case MMC_VDD_28_29: 890 case MMC_VDD_29_30: 891 case MMC_VDD_30_31: 892 case MMC_VDD_31_32: 893 case MMC_VDD_32_33: 894 case MMC_VDD_33_34: 895 case MMC_VDD_34_35: 896 case MMC_VDD_35_36: 897 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 898 pwrclass_val = ext_csd->raw_pwr_cl_26_360; 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_360 : 902 ext_csd->raw_pwr_cl_ddr_52_360; 903 else if (host->ios.clock <= MMC_HS200_MAX_DTR) 904 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? 905 ext_csd->raw_pwr_cl_ddr_200_360 : 906 ext_csd->raw_pwr_cl_200_360; 907 break; 908 default: 909 pr_warn("%s: Voltage range not supported for power class\n", 910 mmc_hostname(host)); 911 return -EINVAL; 912 } 913 914 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 915 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 916 EXT_CSD_PWR_CL_8BIT_SHIFT; 917 else 918 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 919 EXT_CSD_PWR_CL_4BIT_SHIFT; 920 921 /* If the power class is different from the default value */ 922 if (pwrclass_val > 0) { 923 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 924 EXT_CSD_POWER_CLASS, 925 pwrclass_val, 926 card->ext_csd.generic_cmd6_time); 927 } 928 929 return err; 930 } 931 932 static int mmc_select_powerclass(struct mmc_card *card) 933 { 934 struct mmc_host *host = card->host; 935 u32 bus_width, ext_csd_bits; 936 int err, ddr; 937 938 /* Power class selection is supported for versions >= 4.0 */ 939 if (!mmc_can_ext_csd(card)) 940 return 0; 941 942 bus_width = host->ios.bus_width; 943 /* Power class values are defined only for 4/8 bit bus */ 944 if (bus_width == MMC_BUS_WIDTH_1) 945 return 0; 946 947 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; 948 if (ddr) 949 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 950 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 951 else 952 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 953 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; 954 955 err = __mmc_select_powerclass(card, ext_csd_bits); 956 if (err) 957 pr_warn("%s: power class selection to bus width %d ddr %d failed\n", 958 mmc_hostname(host), 1 << bus_width, ddr); 959 960 return err; 961 } 962 963 /* 964 * Set the bus speed for the selected speed mode. 965 */ 966 static void mmc_set_bus_speed(struct mmc_card *card) 967 { 968 unsigned int max_dtr = (unsigned int)-1; 969 970 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 971 max_dtr > card->ext_csd.hs200_max_dtr) 972 max_dtr = card->ext_csd.hs200_max_dtr; 973 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 974 max_dtr = card->ext_csd.hs_max_dtr; 975 else if (max_dtr > card->csd.max_dtr) 976 max_dtr = card->csd.max_dtr; 977 978 mmc_set_clock(card->host, max_dtr); 979 } 980 981 /* 982 * Select the bus width amoung 4-bit and 8-bit(SDR). 983 * If the bus width is changed successfully, return the selected width value. 984 * Zero is returned instead of error value if the wide width is not supported. 985 */ 986 static int mmc_select_bus_width(struct mmc_card *card) 987 { 988 static unsigned ext_csd_bits[] = { 989 EXT_CSD_BUS_WIDTH_8, 990 EXT_CSD_BUS_WIDTH_4, 991 }; 992 static unsigned bus_widths[] = { 993 MMC_BUS_WIDTH_8, 994 MMC_BUS_WIDTH_4, 995 }; 996 struct mmc_host *host = card->host; 997 unsigned idx, bus_width = 0; 998 int err = 0; 999 1000 if (!mmc_can_ext_csd(card) || 1001 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) 1002 return 0; 1003 1004 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; 1005 1006 /* 1007 * Unlike SD, MMC cards dont have a configuration register to notify 1008 * supported bus width. So bus test command should be run to identify 1009 * the supported bus width or compare the ext csd values of current 1010 * bus width and ext csd values of 1 bit mode read earlier. 1011 */ 1012 for (; idx < ARRAY_SIZE(bus_widths); idx++) { 1013 /* 1014 * Host is capable of 8bit transfer, then switch 1015 * the device to work in 8bit transfer mode. If the 1016 * mmc switch command returns error then switch to 1017 * 4bit transfer mode. On success set the corresponding 1018 * bus width on the host. 1019 */ 1020 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1021 EXT_CSD_BUS_WIDTH, 1022 ext_csd_bits[idx], 1023 card->ext_csd.generic_cmd6_time); 1024 if (err) 1025 continue; 1026 1027 bus_width = bus_widths[idx]; 1028 mmc_set_bus_width(host, bus_width); 1029 1030 /* 1031 * If controller can't handle bus width test, 1032 * compare ext_csd previously read in 1 bit mode 1033 * against ext_csd at new bus width 1034 */ 1035 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 1036 err = mmc_compare_ext_csds(card, bus_width); 1037 else 1038 err = mmc_bus_test(card, bus_width); 1039 1040 if (!err) { 1041 err = bus_width; 1042 break; 1043 } else { 1044 pr_warn("%s: switch to bus width %d failed\n", 1045 mmc_hostname(host), 1 << bus_width); 1046 } 1047 } 1048 1049 return err; 1050 } 1051 1052 /* 1053 * Switch to the high-speed mode 1054 */ 1055 static int mmc_select_hs(struct mmc_card *card) 1056 { 1057 int err; 1058 1059 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1060 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 1061 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS, 1062 true, true, true); 1063 if (err) 1064 pr_warn("%s: switch to high-speed failed, err:%d\n", 1065 mmc_hostname(card->host), err); 1066 1067 return err; 1068 } 1069 1070 /* 1071 * Activate wide bus and DDR if supported. 1072 */ 1073 static int mmc_select_hs_ddr(struct mmc_card *card) 1074 { 1075 struct mmc_host *host = card->host; 1076 u32 bus_width, ext_csd_bits; 1077 int err = 0; 1078 1079 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) 1080 return 0; 1081 1082 bus_width = host->ios.bus_width; 1083 if (bus_width == MMC_BUS_WIDTH_1) 1084 return 0; 1085 1086 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 1087 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 1088 1089 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1090 EXT_CSD_BUS_WIDTH, 1091 ext_csd_bits, 1092 card->ext_csd.generic_cmd6_time, 1093 MMC_TIMING_MMC_DDR52, 1094 true, true, true); 1095 if (err) { 1096 pr_err("%s: switch to bus width %d ddr failed\n", 1097 mmc_hostname(host), 1 << bus_width); 1098 return err; 1099 } 1100 1101 /* 1102 * eMMC cards can support 3.3V to 1.2V i/o (vccq) 1103 * signaling. 1104 * 1105 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 1106 * 1107 * 1.8V vccq at 3.3V core voltage (vcc) is not required 1108 * in the JEDEC spec for DDR. 1109 * 1110 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all 1111 * host controller can support this, like some of the SDHCI 1112 * controller which connect to an eMMC device. Some of these 1113 * host controller still needs to use 1.8v vccq for supporting 1114 * DDR mode. 1115 * 1116 * So the sequence will be: 1117 * if (host and device can both support 1.2v IO) 1118 * use 1.2v IO; 1119 * else if (host and device can both support 1.8v IO) 1120 * use 1.8v IO; 1121 * so if host and device can only support 3.3v IO, this is the 1122 * last choice. 1123 * 1124 * WARNING: eMMC rules are NOT the same as SD DDR 1125 */ 1126 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 1127 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1128 if (!err) 1129 return 0; 1130 } 1131 1132 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V && 1133 host->caps & MMC_CAP_1_8V_DDR) 1134 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1135 1136 /* make sure vccq is 3.3v after switching disaster */ 1137 if (err) 1138 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1139 1140 return err; 1141 } 1142 1143 static int mmc_select_hs400(struct mmc_card *card) 1144 { 1145 struct mmc_host *host = card->host; 1146 unsigned int max_dtr; 1147 int err = 0; 1148 u8 val; 1149 1150 /* 1151 * HS400 mode requires 8-bit bus width 1152 */ 1153 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 1154 host->ios.bus_width == MMC_BUS_WIDTH_8)) 1155 return 0; 1156 1157 /* Switch card to HS mode */ 1158 val = EXT_CSD_TIMING_HS; 1159 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1160 EXT_CSD_HS_TIMING, val, 1161 card->ext_csd.generic_cmd6_time, 0, 1162 true, false, true); 1163 if (err) { 1164 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", 1165 mmc_hostname(host), err); 1166 return err; 1167 } 1168 1169 /* Set host controller to HS timing */ 1170 mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 1171 1172 /* Reduce frequency to HS frequency */ 1173 max_dtr = card->ext_csd.hs_max_dtr; 1174 mmc_set_clock(host, max_dtr); 1175 1176 err = mmc_switch_status(card); 1177 if (err) 1178 goto out_err; 1179 1180 /* Switch card to DDR */ 1181 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1182 EXT_CSD_BUS_WIDTH, 1183 EXT_CSD_DDR_BUS_WIDTH_8, 1184 card->ext_csd.generic_cmd6_time); 1185 if (err) { 1186 pr_err("%s: switch to bus width for hs400 failed, err:%d\n", 1187 mmc_hostname(host), err); 1188 return err; 1189 } 1190 1191 /* Switch card to HS400 */ 1192 val = EXT_CSD_TIMING_HS400 | 1193 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1194 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1195 EXT_CSD_HS_TIMING, val, 1196 card->ext_csd.generic_cmd6_time, 0, 1197 true, false, true); 1198 if (err) { 1199 pr_err("%s: switch to hs400 failed, err:%d\n", 1200 mmc_hostname(host), err); 1201 return err; 1202 } 1203 1204 /* Set host controller to HS400 timing and frequency */ 1205 mmc_set_timing(host, MMC_TIMING_MMC_HS400); 1206 mmc_set_bus_speed(card); 1207 1208 err = mmc_switch_status(card); 1209 if (err) 1210 goto out_err; 1211 1212 return 0; 1213 1214 out_err: 1215 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1216 __func__, err); 1217 return err; 1218 } 1219 1220 int mmc_hs200_to_hs400(struct mmc_card *card) 1221 { 1222 return mmc_select_hs400(card); 1223 } 1224 1225 int mmc_hs400_to_hs200(struct mmc_card *card) 1226 { 1227 struct mmc_host *host = card->host; 1228 unsigned int max_dtr; 1229 int err; 1230 u8 val; 1231 1232 /* Reduce frequency to HS */ 1233 max_dtr = card->ext_csd.hs_max_dtr; 1234 mmc_set_clock(host, max_dtr); 1235 1236 /* Switch HS400 to HS DDR */ 1237 val = EXT_CSD_TIMING_HS; 1238 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1239 val, card->ext_csd.generic_cmd6_time, 0, 1240 true, false, true); 1241 if (err) 1242 goto out_err; 1243 1244 mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 1245 1246 err = mmc_switch_status(card); 1247 if (err) 1248 goto out_err; 1249 1250 /* Switch HS DDR to HS */ 1251 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 1252 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, 1253 0, true, false, true); 1254 if (err) 1255 goto out_err; 1256 1257 mmc_set_timing(host, MMC_TIMING_MMC_HS); 1258 1259 err = mmc_switch_status(card); 1260 if (err) 1261 goto out_err; 1262 1263 /* Switch HS to HS200 */ 1264 val = EXT_CSD_TIMING_HS200 | 1265 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1266 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1267 val, card->ext_csd.generic_cmd6_time, 0, 1268 true, false, true); 1269 if (err) 1270 goto out_err; 1271 1272 mmc_set_timing(host, MMC_TIMING_MMC_HS200); 1273 1274 /* 1275 * For HS200, CRC errors are not a reliable way to know the switch 1276 * failed. If there really is a problem, we would expect tuning will 1277 * fail and the result ends up the same. 1278 */ 1279 err = __mmc_switch_status(card, false); 1280 if (err) 1281 goto out_err; 1282 1283 mmc_set_bus_speed(card); 1284 1285 /* Prepare tuning for HS400 mode. */ 1286 if (host->ops->prepare_hs400_tuning) 1287 host->ops->prepare_hs400_tuning(host, &host->ios); 1288 1289 return 0; 1290 1291 out_err: 1292 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1293 __func__, err); 1294 return err; 1295 } 1296 1297 static void mmc_select_driver_type(struct mmc_card *card) 1298 { 1299 int card_drv_type, drive_strength, drv_type = 0; 1300 int fixed_drv_type = card->host->fixed_drv_type; 1301 1302 card_drv_type = card->ext_csd.raw_driver_strength | 1303 mmc_driver_type_mask(0); 1304 1305 if (fixed_drv_type >= 0) 1306 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type) 1307 ? fixed_drv_type : 0; 1308 else 1309 drive_strength = mmc_select_drive_strength(card, 1310 card->ext_csd.hs200_max_dtr, 1311 card_drv_type, &drv_type); 1312 1313 card->drive_strength = drive_strength; 1314 1315 if (drv_type) 1316 mmc_set_driver_type(card->host, drv_type); 1317 } 1318 1319 static int mmc_select_hs400es(struct mmc_card *card) 1320 { 1321 struct mmc_host *host = card->host; 1322 int err = -EINVAL; 1323 u8 val; 1324 1325 if (!(host->caps & MMC_CAP_8_BIT_DATA)) { 1326 err = -ENOTSUPP; 1327 goto out_err; 1328 } 1329 1330 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) 1331 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1332 1333 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) 1334 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1335 1336 /* If fails try again during next card power cycle */ 1337 if (err) 1338 goto out_err; 1339 1340 err = mmc_select_bus_width(card); 1341 if (err < 0) 1342 goto out_err; 1343 1344 /* Switch card to HS mode */ 1345 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1346 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 1347 card->ext_csd.generic_cmd6_time, 0, 1348 true, false, true); 1349 if (err) { 1350 pr_err("%s: switch to hs for hs400es failed, err:%d\n", 1351 mmc_hostname(host), err); 1352 goto out_err; 1353 } 1354 1355 mmc_set_timing(host, MMC_TIMING_MMC_HS); 1356 err = mmc_switch_status(card); 1357 if (err) 1358 goto out_err; 1359 1360 mmc_set_clock(host, card->ext_csd.hs_max_dtr); 1361 1362 /* Switch card to DDR with strobe bit */ 1363 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; 1364 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1365 EXT_CSD_BUS_WIDTH, 1366 val, 1367 card->ext_csd.generic_cmd6_time); 1368 if (err) { 1369 pr_err("%s: switch to bus width for hs400es failed, err:%d\n", 1370 mmc_hostname(host), err); 1371 goto out_err; 1372 } 1373 1374 mmc_select_driver_type(card); 1375 1376 /* Switch card to HS400 */ 1377 val = EXT_CSD_TIMING_HS400 | 1378 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1379 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1380 EXT_CSD_HS_TIMING, val, 1381 card->ext_csd.generic_cmd6_time, 0, 1382 true, false, true); 1383 if (err) { 1384 pr_err("%s: switch to hs400es failed, err:%d\n", 1385 mmc_hostname(host), err); 1386 goto out_err; 1387 } 1388 1389 /* Set host controller to HS400 timing and frequency */ 1390 mmc_set_timing(host, MMC_TIMING_MMC_HS400); 1391 1392 /* Controller enable enhanced strobe function */ 1393 host->ios.enhanced_strobe = true; 1394 if (host->ops->hs400_enhanced_strobe) 1395 host->ops->hs400_enhanced_strobe(host, &host->ios); 1396 1397 err = mmc_switch_status(card); 1398 if (err) 1399 goto out_err; 1400 1401 return 0; 1402 1403 out_err: 1404 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1405 __func__, err); 1406 return err; 1407 } 1408 1409 /* 1410 * For device supporting HS200 mode, the following sequence 1411 * should be done before executing the tuning process. 1412 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) 1413 * 2. switch to HS200 mode 1414 * 3. set the clock to > 52Mhz and <=200MHz 1415 */ 1416 static int mmc_select_hs200(struct mmc_card *card) 1417 { 1418 struct mmc_host *host = card->host; 1419 unsigned int old_timing, old_signal_voltage; 1420 int err = -EINVAL; 1421 u8 val; 1422 1423 old_signal_voltage = host->ios.signal_voltage; 1424 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) 1425 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1426 1427 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) 1428 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1429 1430 /* If fails try again during next card power cycle */ 1431 if (err) 1432 return err; 1433 1434 mmc_select_driver_type(card); 1435 1436 /* 1437 * Set the bus width(4 or 8) with host's support and 1438 * switch to HS200 mode if bus width is set successfully. 1439 */ 1440 err = mmc_select_bus_width(card); 1441 if (err > 0) { 1442 val = EXT_CSD_TIMING_HS200 | 1443 card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1444 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1445 EXT_CSD_HS_TIMING, val, 1446 card->ext_csd.generic_cmd6_time, 0, 1447 true, false, true); 1448 if (err) 1449 goto err; 1450 old_timing = host->ios.timing; 1451 mmc_set_timing(host, MMC_TIMING_MMC_HS200); 1452 1453 /* 1454 * For HS200, CRC errors are not a reliable way to know the 1455 * switch failed. If there really is a problem, we would expect 1456 * tuning will fail and the result ends up the same. 1457 */ 1458 err = __mmc_switch_status(card, false); 1459 1460 /* 1461 * mmc_select_timing() assumes timing has not changed if 1462 * it is a switch error. 1463 */ 1464 if (err == -EBADMSG) 1465 mmc_set_timing(host, old_timing); 1466 } 1467 err: 1468 if (err) { 1469 /* fall back to the old signal voltage, if fails report error */ 1470 if (mmc_set_signal_voltage(host, old_signal_voltage)) 1471 err = -EIO; 1472 1473 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1474 __func__, err); 1475 } 1476 return err; 1477 } 1478 1479 /* 1480 * Activate High Speed, HS200 or HS400ES mode if supported. 1481 */ 1482 static int mmc_select_timing(struct mmc_card *card) 1483 { 1484 int err = 0; 1485 1486 if (!mmc_can_ext_csd(card)) 1487 goto bus_speed; 1488 1489 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) 1490 err = mmc_select_hs400es(card); 1491 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) 1492 err = mmc_select_hs200(card); 1493 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) 1494 err = mmc_select_hs(card); 1495 1496 if (err && err != -EBADMSG) 1497 return err; 1498 1499 bus_speed: 1500 /* 1501 * Set the bus speed to the selected bus timing. 1502 * If timing is not selected, backward compatible is the default. 1503 */ 1504 mmc_set_bus_speed(card); 1505 return 0; 1506 } 1507 1508 /* 1509 * Execute tuning sequence to seek the proper bus operating 1510 * conditions for HS200 and HS400, which sends CMD21 to the device. 1511 */ 1512 static int mmc_hs200_tuning(struct mmc_card *card) 1513 { 1514 struct mmc_host *host = card->host; 1515 1516 /* 1517 * Timing should be adjusted to the HS400 target 1518 * operation frequency for tuning process 1519 */ 1520 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 1521 host->ios.bus_width == MMC_BUS_WIDTH_8) 1522 if (host->ops->prepare_hs400_tuning) 1523 host->ops->prepare_hs400_tuning(host, &host->ios); 1524 1525 return mmc_execute_tuning(card); 1526 } 1527 1528 /* 1529 * Handle the detection and initialisation of a card. 1530 * 1531 * In the case of a resume, "oldcard" will contain the card 1532 * we're trying to reinitialise. 1533 */ 1534 static int mmc_init_card(struct mmc_host *host, u32 ocr, 1535 struct mmc_card *oldcard) 1536 { 1537 struct mmc_card *card; 1538 int err; 1539 u32 cid[4]; 1540 u32 rocr; 1541 1542 WARN_ON(!host->claimed); 1543 1544 /* Set correct bus mode for MMC before attempting init */ 1545 if (!mmc_host_is_spi(host)) 1546 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 1547 1548 /* 1549 * Since we're changing the OCR value, we seem to 1550 * need to tell some cards to go back to the idle 1551 * state. We wait 1ms to give cards time to 1552 * respond. 1553 * mmc_go_idle is needed for eMMC that are asleep 1554 */ 1555 mmc_go_idle(host); 1556 1557 /* The extra bit indicates that we support high capacity */ 1558 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 1559 if (err) 1560 goto err; 1561 1562 /* 1563 * For SPI, enable CRC as appropriate. 1564 */ 1565 if (mmc_host_is_spi(host)) { 1566 err = mmc_spi_set_crc(host, use_spi_crc); 1567 if (err) 1568 goto err; 1569 } 1570 1571 /* 1572 * Fetch CID from card. 1573 */ 1574 err = mmc_send_cid(host, cid); 1575 if (err) 1576 goto err; 1577 1578 if (oldcard) { 1579 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1580 err = -ENOENT; 1581 goto err; 1582 } 1583 1584 card = oldcard; 1585 } else { 1586 /* 1587 * Allocate card structure. 1588 */ 1589 card = mmc_alloc_card(host, &mmc_type); 1590 if (IS_ERR(card)) { 1591 err = PTR_ERR(card); 1592 goto err; 1593 } 1594 1595 card->ocr = ocr; 1596 card->type = MMC_TYPE_MMC; 1597 card->rca = 1; 1598 memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 1599 } 1600 1601 /* 1602 * Call the optional HC's init_card function to handle quirks. 1603 */ 1604 if (host->ops->init_card) 1605 host->ops->init_card(host, card); 1606 1607 /* 1608 * For native busses: set card RCA and quit open drain mode. 1609 */ 1610 if (!mmc_host_is_spi(host)) { 1611 err = mmc_set_relative_addr(card); 1612 if (err) 1613 goto free_card; 1614 1615 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 1616 } 1617 1618 if (!oldcard) { 1619 /* 1620 * Fetch CSD from card. 1621 */ 1622 err = mmc_send_csd(card, card->raw_csd); 1623 if (err) 1624 goto free_card; 1625 1626 err = mmc_decode_csd(card); 1627 if (err) 1628 goto free_card; 1629 err = mmc_decode_cid(card); 1630 if (err) 1631 goto free_card; 1632 } 1633 1634 /* 1635 * handling only for cards supporting DSR and hosts requesting 1636 * DSR configuration 1637 */ 1638 if (card->csd.dsr_imp && host->dsr_req) 1639 mmc_set_dsr(host); 1640 1641 /* 1642 * Select card, as all following commands rely on that. 1643 */ 1644 if (!mmc_host_is_spi(host)) { 1645 err = mmc_select_card(card); 1646 if (err) 1647 goto free_card; 1648 } 1649 1650 if (!oldcard) { 1651 /* Read extended CSD. */ 1652 err = mmc_read_ext_csd(card); 1653 if (err) 1654 goto free_card; 1655 1656 /* 1657 * If doing byte addressing, check if required to do sector 1658 * addressing. Handle the case of <2GB cards needing sector 1659 * addressing. See section 8.1 JEDEC Standard JED84-A441; 1660 * ocr register has bit 30 set for sector addressing. 1661 */ 1662 if (rocr & BIT(30)) 1663 mmc_card_set_blockaddr(card); 1664 1665 /* Erase size depends on CSD and Extended CSD */ 1666 mmc_set_erase_size(card); 1667 } 1668 1669 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ 1670 if (card->ext_csd.rev >= 3) { 1671 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1672 EXT_CSD_ERASE_GROUP_DEF, 1, 1673 card->ext_csd.generic_cmd6_time); 1674 1675 if (err && err != -EBADMSG) 1676 goto free_card; 1677 1678 if (err) { 1679 err = 0; 1680 /* 1681 * Just disable enhanced area off & sz 1682 * will try to enable ERASE_GROUP_DEF 1683 * during next time reinit 1684 */ 1685 card->ext_csd.enhanced_area_offset = -EINVAL; 1686 card->ext_csd.enhanced_area_size = -EINVAL; 1687 } else { 1688 card->ext_csd.erase_group_def = 1; 1689 /* 1690 * enable ERASE_GRP_DEF successfully. 1691 * This will affect the erase size, so 1692 * here need to reset erase size 1693 */ 1694 mmc_set_erase_size(card); 1695 } 1696 } 1697 1698 /* 1699 * Ensure eMMC user default partition is enabled 1700 */ 1701 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 1702 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 1703 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 1704 card->ext_csd.part_config, 1705 card->ext_csd.part_time); 1706 if (err && err != -EBADMSG) 1707 goto free_card; 1708 } 1709 1710 /* 1711 * Enable power_off_notification byte in the ext_csd register 1712 */ 1713 if (card->ext_csd.rev >= 6) { 1714 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1715 EXT_CSD_POWER_OFF_NOTIFICATION, 1716 EXT_CSD_POWER_ON, 1717 card->ext_csd.generic_cmd6_time); 1718 if (err && err != -EBADMSG) 1719 goto free_card; 1720 1721 /* 1722 * The err can be -EBADMSG or 0, 1723 * so check for success and update the flag 1724 */ 1725 if (!err) 1726 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; 1727 } 1728 1729 /* 1730 * Select timing interface 1731 */ 1732 err = mmc_select_timing(card); 1733 if (err) 1734 goto free_card; 1735 1736 if (mmc_card_hs200(card)) { 1737 err = mmc_hs200_tuning(card); 1738 if (err) 1739 goto free_card; 1740 1741 err = mmc_select_hs400(card); 1742 if (err) 1743 goto free_card; 1744 } else if (!mmc_card_hs400es(card)) { 1745 /* Select the desired bus width optionally */ 1746 err = mmc_select_bus_width(card); 1747 if (err > 0 && mmc_card_hs(card)) { 1748 err = mmc_select_hs_ddr(card); 1749 if (err) 1750 goto free_card; 1751 } 1752 } 1753 1754 /* 1755 * Choose the power class with selected bus interface 1756 */ 1757 mmc_select_powerclass(card); 1758 1759 /* 1760 * Enable HPI feature (if supported) 1761 */ 1762 if (card->ext_csd.hpi) { 1763 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1764 EXT_CSD_HPI_MGMT, 1, 1765 card->ext_csd.generic_cmd6_time); 1766 if (err && err != -EBADMSG) 1767 goto free_card; 1768 if (err) { 1769 pr_warn("%s: Enabling HPI failed\n", 1770 mmc_hostname(card->host)); 1771 err = 0; 1772 } else 1773 card->ext_csd.hpi_en = 1; 1774 } 1775 1776 /* 1777 * If cache size is higher than 0, this indicates 1778 * the existence of cache and it can be turned on. 1779 */ 1780 if (!mmc_card_broken_hpi(card) && 1781 card->ext_csd.cache_size > 0) { 1782 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1783 EXT_CSD_CACHE_CTRL, 1, 1784 card->ext_csd.generic_cmd6_time); 1785 if (err && err != -EBADMSG) 1786 goto free_card; 1787 1788 /* 1789 * Only if no error, cache is turned on successfully. 1790 */ 1791 if (err) { 1792 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", 1793 mmc_hostname(card->host), err); 1794 card->ext_csd.cache_ctrl = 0; 1795 err = 0; 1796 } else { 1797 card->ext_csd.cache_ctrl = 1; 1798 } 1799 } 1800 1801 /* 1802 * Enable Command Queue if supported. Note that Packed Commands cannot 1803 * be used with Command Queue. 1804 */ 1805 card->ext_csd.cmdq_en = false; 1806 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) { 1807 err = mmc_cmdq_enable(card); 1808 if (err && err != -EBADMSG) 1809 goto free_card; 1810 if (err) { 1811 pr_warn("%s: Enabling CMDQ failed\n", 1812 mmc_hostname(card->host)); 1813 card->ext_csd.cmdq_support = false; 1814 card->ext_csd.cmdq_depth = 0; 1815 err = 0; 1816 } 1817 } 1818 /* 1819 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be 1820 * disabled for a time, so a flag is needed to indicate to re-enable the 1821 * Command Queue. 1822 */ 1823 card->reenable_cmdq = card->ext_csd.cmdq_en; 1824 1825 if (card->ext_csd.cmdq_en && !host->cqe_enabled) { 1826 err = host->cqe_ops->cqe_enable(host, card); 1827 if (err) { 1828 pr_err("%s: Failed to enable CQE, error %d\n", 1829 mmc_hostname(host), err); 1830 } else { 1831 host->cqe_enabled = true; 1832 pr_info("%s: Command Queue Engine enabled\n", 1833 mmc_hostname(host)); 1834 } 1835 } 1836 1837 if (host->caps2 & MMC_CAP2_AVOID_3_3V && 1838 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1839 pr_err("%s: Host failed to negotiate down from 3.3V\n", 1840 mmc_hostname(host)); 1841 err = -EINVAL; 1842 goto free_card; 1843 } 1844 1845 if (!oldcard) 1846 host->card = card; 1847 1848 return 0; 1849 1850 free_card: 1851 if (!oldcard) 1852 mmc_remove_card(card); 1853 err: 1854 return err; 1855 } 1856 1857 static int mmc_can_sleep(struct mmc_card *card) 1858 { 1859 return (card && card->ext_csd.rev >= 3); 1860 } 1861 1862 static int mmc_sleep(struct mmc_host *host) 1863 { 1864 struct mmc_command cmd = {}; 1865 struct mmc_card *card = host->card; 1866 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); 1867 int err; 1868 1869 /* Re-tuning can't be done once the card is deselected */ 1870 mmc_retune_hold(host); 1871 1872 err = mmc_deselect_cards(host); 1873 if (err) 1874 goto out_release; 1875 1876 cmd.opcode = MMC_SLEEP_AWAKE; 1877 cmd.arg = card->rca << 16; 1878 cmd.arg |= 1 << 15; 1879 1880 /* 1881 * If the max_busy_timeout of the host is specified, validate it against 1882 * the sleep cmd timeout. A failure means we need to prevent the host 1883 * from doing hw busy detection, which is done by converting to a R1 1884 * response instead of a R1B. 1885 */ 1886 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { 1887 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1888 } else { 1889 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 1890 cmd.busy_timeout = timeout_ms; 1891 } 1892 1893 err = mmc_wait_for_cmd(host, &cmd, 0); 1894 if (err) 1895 goto out_release; 1896 1897 /* 1898 * If the host does not wait while the card signals busy, then we will 1899 * will have to wait the sleep/awake timeout. Note, we cannot use the 1900 * SEND_STATUS command to poll the status because that command (and most 1901 * others) is invalid while the card sleeps. 1902 */ 1903 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) 1904 mmc_delay(timeout_ms); 1905 1906 out_release: 1907 mmc_retune_release(host); 1908 return err; 1909 } 1910 1911 static int mmc_can_poweroff_notify(const struct mmc_card *card) 1912 { 1913 return card && 1914 mmc_card_mmc(card) && 1915 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); 1916 } 1917 1918 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) 1919 { 1920 unsigned int timeout = card->ext_csd.generic_cmd6_time; 1921 int err; 1922 1923 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ 1924 if (notify_type == EXT_CSD_POWER_OFF_LONG) 1925 timeout = card->ext_csd.power_off_longtime; 1926 1927 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1928 EXT_CSD_POWER_OFF_NOTIFICATION, 1929 notify_type, timeout, 0, true, false, false); 1930 if (err) 1931 pr_err("%s: Power Off Notification timed out, %u\n", 1932 mmc_hostname(card->host), timeout); 1933 1934 /* Disable the power off notification after the switch operation. */ 1935 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; 1936 1937 return err; 1938 } 1939 1940 /* 1941 * Host is being removed. Free up the current card. 1942 */ 1943 static void mmc_remove(struct mmc_host *host) 1944 { 1945 mmc_remove_card(host->card); 1946 host->card = NULL; 1947 } 1948 1949 /* 1950 * Card detection - card is alive. 1951 */ 1952 static int mmc_alive(struct mmc_host *host) 1953 { 1954 return mmc_send_status(host->card, NULL); 1955 } 1956 1957 /* 1958 * Card detection callback from host. 1959 */ 1960 static void mmc_detect(struct mmc_host *host) 1961 { 1962 int err; 1963 1964 mmc_get_card(host->card, NULL); 1965 1966 /* 1967 * Just check if our card has been removed. 1968 */ 1969 err = _mmc_detect_card_removed(host); 1970 1971 mmc_put_card(host->card, NULL); 1972 1973 if (err) { 1974 mmc_remove(host); 1975 1976 mmc_claim_host(host); 1977 mmc_detach_bus(host); 1978 mmc_power_off(host); 1979 mmc_release_host(host); 1980 } 1981 } 1982 1983 static int _mmc_suspend(struct mmc_host *host, bool is_suspend) 1984 { 1985 int err = 0; 1986 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : 1987 EXT_CSD_POWER_OFF_LONG; 1988 1989 mmc_claim_host(host); 1990 1991 if (mmc_card_suspended(host->card)) 1992 goto out; 1993 1994 if (mmc_card_doing_bkops(host->card)) { 1995 err = mmc_stop_bkops(host->card); 1996 if (err) 1997 goto out; 1998 } 1999 2000 err = mmc_flush_cache(host->card); 2001 if (err) 2002 goto out; 2003 2004 if (mmc_can_poweroff_notify(host->card) && 2005 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend)) 2006 err = mmc_poweroff_notify(host->card, notify_type); 2007 else if (mmc_can_sleep(host->card)) 2008 err = mmc_sleep(host); 2009 else if (!mmc_host_is_spi(host)) 2010 err = mmc_deselect_cards(host); 2011 2012 if (!err) { 2013 mmc_power_off(host); 2014 mmc_card_set_suspended(host->card); 2015 } 2016 out: 2017 mmc_release_host(host); 2018 return err; 2019 } 2020 2021 /* 2022 * Suspend callback 2023 */ 2024 static int mmc_suspend(struct mmc_host *host) 2025 { 2026 int err; 2027 2028 err = _mmc_suspend(host, true); 2029 if (!err) { 2030 pm_runtime_disable(&host->card->dev); 2031 pm_runtime_set_suspended(&host->card->dev); 2032 } 2033 2034 return err; 2035 } 2036 2037 /* 2038 * This function tries to determine if the same card is still present 2039 * and, if so, restore all state to it. 2040 */ 2041 static int _mmc_resume(struct mmc_host *host) 2042 { 2043 int err = 0; 2044 2045 mmc_claim_host(host); 2046 2047 if (!mmc_card_suspended(host->card)) 2048 goto out; 2049 2050 mmc_power_up(host, host->card->ocr); 2051 err = mmc_init_card(host, host->card->ocr, host->card); 2052 mmc_card_clr_suspended(host->card); 2053 2054 out: 2055 mmc_release_host(host); 2056 return err; 2057 } 2058 2059 /* 2060 * Shutdown callback 2061 */ 2062 static int mmc_shutdown(struct mmc_host *host) 2063 { 2064 int err = 0; 2065 2066 /* 2067 * In a specific case for poweroff notify, we need to resume the card 2068 * before we can shutdown it properly. 2069 */ 2070 if (mmc_can_poweroff_notify(host->card) && 2071 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) 2072 err = _mmc_resume(host); 2073 2074 if (!err) 2075 err = _mmc_suspend(host, false); 2076 2077 return err; 2078 } 2079 2080 /* 2081 * Callback for resume. 2082 */ 2083 static int mmc_resume(struct mmc_host *host) 2084 { 2085 pm_runtime_enable(&host->card->dev); 2086 return 0; 2087 } 2088 2089 /* 2090 * Callback for runtime_suspend. 2091 */ 2092 static int mmc_runtime_suspend(struct mmc_host *host) 2093 { 2094 int err; 2095 2096 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 2097 return 0; 2098 2099 err = _mmc_suspend(host, true); 2100 if (err) 2101 pr_err("%s: error %d doing aggressive suspend\n", 2102 mmc_hostname(host), err); 2103 2104 return err; 2105 } 2106 2107 /* 2108 * Callback for runtime_resume. 2109 */ 2110 static int mmc_runtime_resume(struct mmc_host *host) 2111 { 2112 int err; 2113 2114 err = _mmc_resume(host); 2115 if (err && err != -ENOMEDIUM) 2116 pr_err("%s: error %d doing runtime resume\n", 2117 mmc_hostname(host), err); 2118 2119 return 0; 2120 } 2121 2122 static int mmc_can_reset(struct mmc_card *card) 2123 { 2124 u8 rst_n_function; 2125 2126 rst_n_function = card->ext_csd.rst_n_function; 2127 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) 2128 return 0; 2129 return 1; 2130 } 2131 2132 static int _mmc_hw_reset(struct mmc_host *host) 2133 { 2134 struct mmc_card *card = host->card; 2135 2136 /* 2137 * In the case of recovery, we can't expect flushing the cache to work 2138 * always, but we have a go and ignore errors. 2139 */ 2140 mmc_flush_cache(host->card); 2141 2142 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset && 2143 mmc_can_reset(card)) { 2144 /* If the card accept RST_n signal, send it. */ 2145 mmc_set_clock(host, host->f_init); 2146 host->ops->hw_reset(host); 2147 /* Set initial state and call mmc_set_ios */ 2148 mmc_set_initial_state(host); 2149 } else { 2150 /* Do a brute force power cycle */ 2151 mmc_power_cycle(host, card->ocr); 2152 mmc_pwrseq_reset(host); 2153 } 2154 return mmc_init_card(host, card->ocr, card); 2155 } 2156 2157 static const struct mmc_bus_ops mmc_ops = { 2158 .remove = mmc_remove, 2159 .detect = mmc_detect, 2160 .suspend = mmc_suspend, 2161 .resume = mmc_resume, 2162 .runtime_suspend = mmc_runtime_suspend, 2163 .runtime_resume = mmc_runtime_resume, 2164 .alive = mmc_alive, 2165 .shutdown = mmc_shutdown, 2166 .hw_reset = _mmc_hw_reset, 2167 }; 2168 2169 /* 2170 * Starting point for MMC card init. 2171 */ 2172 int mmc_attach_mmc(struct mmc_host *host) 2173 { 2174 int err; 2175 u32 ocr, rocr; 2176 2177 WARN_ON(!host->claimed); 2178 2179 /* Set correct bus mode for MMC before attempting attach */ 2180 if (!mmc_host_is_spi(host)) 2181 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 2182 2183 err = mmc_send_op_cond(host, 0, &ocr); 2184 if (err) 2185 return err; 2186 2187 mmc_attach_bus(host, &mmc_ops); 2188 if (host->ocr_avail_mmc) 2189 host->ocr_avail = host->ocr_avail_mmc; 2190 2191 /* 2192 * We need to get OCR a different way for SPI. 2193 */ 2194 if (mmc_host_is_spi(host)) { 2195 err = mmc_spi_read_ocr(host, 1, &ocr); 2196 if (err) 2197 goto err; 2198 } 2199 2200 rocr = mmc_select_voltage(host, ocr); 2201 2202 /* 2203 * Can we support the voltage of the card? 2204 */ 2205 if (!rocr) { 2206 err = -EINVAL; 2207 goto err; 2208 } 2209 2210 /* 2211 * Detect and init the card. 2212 */ 2213 err = mmc_init_card(host, rocr, NULL); 2214 if (err) 2215 goto err; 2216 2217 mmc_release_host(host); 2218 err = mmc_add_card(host->card); 2219 if (err) 2220 goto remove_card; 2221 2222 mmc_claim_host(host); 2223 return 0; 2224 2225 remove_card: 2226 mmc_remove_card(host->card); 2227 mmc_claim_host(host); 2228 host->card = NULL; 2229 err: 2230 mmc_detach_bus(host); 2231 2232 pr_err("%s: error %d whilst initialising MMC card\n", 2233 mmc_hostname(host), err); 2234 2235 return err; 2236 } 2237