17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/mmc.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 67ea239d9SPierre Ossman * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. 77ea239d9SPierre Ossman * 87ea239d9SPierre Ossman * This program is free software; you can redistribute it and/or modify 97ea239d9SPierre Ossman * it under the terms of the GNU General Public License version 2 as 107ea239d9SPierre Ossman * published by the Free Software Foundation. 117ea239d9SPierre Ossman */ 127ea239d9SPierre Ossman 137ea239d9SPierre Ossman #include <linux/err.h> 1481f8a7beSHans de Goede #include <linux/of.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 160205a904SPaul Gortmaker #include <linux/stat.h> 170cb403a2SUlf Hansson #include <linux/pm_runtime.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include <linux/mmc/host.h> 207ea239d9SPierre Ossman #include <linux/mmc/card.h> 217ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 227ea239d9SPierre Ossman 237ea239d9SPierre Ossman #include "core.h" 24436f8daaSAdrian Hunter #include "host.h" 254101c16aSPierre Ossman #include "bus.h" 267ea239d9SPierre Ossman #include "mmc_ops.h" 274c4cb171SPhilip Rakity #include "sd_ops.h" 287ea239d9SPierre Ossman 297ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 307ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 317ea239d9SPierre Ossman 0, 0, 0, 0 327ea239d9SPierre Ossman }; 337ea239d9SPierre Ossman 347ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 357ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 367ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 377ea239d9SPierre Ossman }; 387ea239d9SPierre Ossman 397ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 407ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 417ea239d9SPierre Ossman }; 427ea239d9SPierre Ossman 437ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 447ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 457ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 467ea239d9SPierre Ossman }; 477ea239d9SPierre Ossman 485320226aSPratibhasagar V static const struct mmc_fixup mmc_ext_csd_fixups[] = { 495320226aSPratibhasagar V /* 505320226aSPratibhasagar V * Certain Hynix eMMC 4.41 cards might get broken when HPI feature 515320226aSPratibhasagar V * is used so disable the HPI feature for such buggy cards. 525320226aSPratibhasagar V */ 535320226aSPratibhasagar V MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX, 545320226aSPratibhasagar V 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5), 555320226aSPratibhasagar V 565320226aSPratibhasagar V END_FIXUP 575320226aSPratibhasagar V }; 585320226aSPratibhasagar V 597ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 607ea239d9SPierre Ossman ({ \ 617ea239d9SPierre Ossman const int __size = size; \ 627ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 637ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 647ea239d9SPierre Ossman const int __shft = (start) & 31; \ 657ea239d9SPierre Ossman u32 __res; \ 667ea239d9SPierre Ossman \ 677ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 687ea239d9SPierre Ossman if (__size + __shft > 32) \ 697ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 707ea239d9SPierre Ossman __res & __mask; \ 717ea239d9SPierre Ossman }) 727ea239d9SPierre Ossman 737ea239d9SPierre Ossman /* 747ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 757ea239d9SPierre Ossman */ 76bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 777ea239d9SPierre Ossman { 787ea239d9SPierre Ossman u32 *resp = card->raw_cid; 797ea239d9SPierre Ossman 807ea239d9SPierre Ossman /* 817ea239d9SPierre Ossman * The selection of the format here is based upon published 827ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 837ea239d9SPierre Ossman */ 847ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 857ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 867ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 877ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 887ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 897ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 907ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 917ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 927ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 937ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 947ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 957ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 967ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 977ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 987ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 997ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1007ea239d9SPierre Ossman break; 1017ea239d9SPierre Ossman 1027ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 1037ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 1047ea239d9SPierre Ossman case 4: /* MMC v4 */ 1057ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 1067ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 1077ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 1087ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 1097ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 1107ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 1117ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 1127ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 11351e7e8b6SBernie Thompson card->cid.prv = UNSTUFF_BITS(resp, 48, 8); 1147ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 1157ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 1167ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1177ea239d9SPierre Ossman break; 1187ea239d9SPierre Ossman 1197ea239d9SPierre Ossman default: 120a3c76eb9SGirish K S pr_err("%s: card has unknown MMCA version %d\n", 1217ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 122bd766312SPierre Ossman return -EINVAL; 1237ea239d9SPierre Ossman } 124bd766312SPierre Ossman 125bd766312SPierre Ossman return 0; 1267ea239d9SPierre Ossman } 1277ea239d9SPierre Ossman 128dfe86cbaSAdrian Hunter static void mmc_set_erase_size(struct mmc_card *card) 129dfe86cbaSAdrian Hunter { 130dfe86cbaSAdrian Hunter if (card->ext_csd.erase_group_def & 1) 131dfe86cbaSAdrian Hunter card->erase_size = card->ext_csd.hc_erase_size; 132dfe86cbaSAdrian Hunter else 133dfe86cbaSAdrian Hunter card->erase_size = card->csd.erase_size; 134dfe86cbaSAdrian Hunter 135dfe86cbaSAdrian Hunter mmc_init_erase(card); 136dfe86cbaSAdrian Hunter } 137dfe86cbaSAdrian Hunter 1387ea239d9SPierre Ossman /* 1397ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1407ea239d9SPierre Ossman */ 141bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1427ea239d9SPierre Ossman { 1437ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 144dfe86cbaSAdrian Hunter unsigned int e, m, a, b; 1457ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1467ea239d9SPierre Ossman 1477ea239d9SPierre Ossman /* 1487ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1497ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1506da24b78SKyungmin Park * We also support eMMC v4.4 & v4.41. 1517ea239d9SPierre Ossman */ 1526da24b78SKyungmin Park csd->structure = UNSTUFF_BITS(resp, 126, 2); 1536da24b78SKyungmin Park if (csd->structure == 0) { 154a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1556da24b78SKyungmin Park mmc_hostname(card->host), csd->structure); 156bd766312SPierre Ossman return -EINVAL; 1577ea239d9SPierre Ossman } 1587ea239d9SPierre Ossman 1597ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1607ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1617ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1627ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1637ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1647ea239d9SPierre Ossman 1657ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1667ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1677ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1687ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1697ea239d9SPierre Ossman 1707ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1717ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1727ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1737ea239d9SPierre Ossman 1747ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1757ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1767ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1777ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1783d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1797ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1807ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1817ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 182bd766312SPierre Ossman 183dfe86cbaSAdrian Hunter if (csd->write_blkbits >= 9) { 184dfe86cbaSAdrian Hunter a = UNSTUFF_BITS(resp, 42, 5); 185dfe86cbaSAdrian Hunter b = UNSTUFF_BITS(resp, 37, 5); 186dfe86cbaSAdrian Hunter csd->erase_size = (a + 1) * (b + 1); 187dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 188dfe86cbaSAdrian Hunter } 189dfe86cbaSAdrian Hunter 190bd766312SPierre Ossman return 0; 1917ea239d9SPierre Ossman } 1927ea239d9SPierre Ossman 19396cf5f02SSeungwon Jeon static void mmc_select_card_type(struct mmc_card *card) 19496cf5f02SSeungwon Jeon { 19596cf5f02SSeungwon Jeon struct mmc_host *host = card->host; 1960a5b6438SSeungwon Jeon u8 card_type = card->ext_csd.raw_card_type; 1975f1a4dd0SLee Jones u32 caps = host->caps, caps2 = host->caps2; 198577fb131SSeungwon Jeon unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; 1992415c0efSSeungwon Jeon unsigned int avail_type = 0; 20096cf5f02SSeungwon Jeon 20196cf5f02SSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 2022415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_26) { 2032415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_26_MAX_DTR; 2042415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_26; 2052415c0efSSeungwon Jeon } 2062415c0efSSeungwon Jeon 2072415c0efSSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 2082415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_52) { 20996cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_52_MAX_DTR; 2102415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_52; 2112415c0efSSeungwon Jeon } 21296cf5f02SSeungwon Jeon 2132415c0efSSeungwon Jeon if (caps & MMC_CAP_1_8V_DDR && 2142415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { 21596cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2162415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; 2172415c0efSSeungwon Jeon } 21896cf5f02SSeungwon Jeon 2192415c0efSSeungwon Jeon if (caps & MMC_CAP_1_2V_DDR && 2202415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 2212415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2222415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; 2232415c0efSSeungwon Jeon } 2242415c0efSSeungwon Jeon 2252415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_8V_SDR && 2262415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { 227577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2282415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; 2292415c0efSSeungwon Jeon } 2302415c0efSSeungwon Jeon 2312415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_2V_SDR && 2322415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { 233577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2342415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; 2352415c0efSSeungwon Jeon } 23696cf5f02SSeungwon Jeon 2370a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_8V && 2380a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { 2390a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2400a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; 2410a5b6438SSeungwon Jeon } 2420a5b6438SSeungwon Jeon 2430a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_2V && 2440a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { 2450a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2460a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; 2470a5b6438SSeungwon Jeon } 2480a5b6438SSeungwon Jeon 24981ac2af6SShawn Lin if ((caps2 & MMC_CAP2_HS400_ES) && 25081ac2af6SShawn Lin card->ext_csd.strobe_support && 25181ac2af6SShawn Lin (avail_type & EXT_CSD_CARD_TYPE_HS400)) 25281ac2af6SShawn Lin avail_type |= EXT_CSD_CARD_TYPE_HS400ES; 25381ac2af6SShawn Lin 25496cf5f02SSeungwon Jeon card->ext_csd.hs_max_dtr = hs_max_dtr; 255577fb131SSeungwon Jeon card->ext_csd.hs200_max_dtr = hs200_max_dtr; 2562415c0efSSeungwon Jeon card->mmc_avail_type = avail_type; 25796cf5f02SSeungwon Jeon } 25896cf5f02SSeungwon Jeon 259b4493eeaSGrégory Soutadé static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) 260b4493eeaSGrégory Soutadé { 261994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 262994324bbSGrégory Soutadé 263994324bbSGrégory Soutadé /* 264994324bbSGrégory Soutadé * Disable these attributes by default 265994324bbSGrégory Soutadé */ 266994324bbSGrégory Soutadé card->ext_csd.enhanced_area_offset = -EINVAL; 267994324bbSGrégory Soutadé card->ext_csd.enhanced_area_size = -EINVAL; 268b4493eeaSGrégory Soutadé 269b4493eeaSGrégory Soutadé /* 270b4493eeaSGrégory Soutadé * Enhanced area feature support -- check whether the eMMC 271b4493eeaSGrégory Soutadé * card has the Enhanced area enabled. If so, export enhanced 272b4493eeaSGrégory Soutadé * area offset and size to user by adding sysfs interface. 273b4493eeaSGrégory Soutadé */ 274b4493eeaSGrégory Soutadé if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 275b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 276994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed) { 277b4493eeaSGrégory Soutadé hc_erase_grp_sz = 278b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 279b4493eeaSGrégory Soutadé hc_wp_grp_sz = 280b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 281b4493eeaSGrégory Soutadé 282b4493eeaSGrégory Soutadé /* 283b4493eeaSGrégory Soutadé * calculate the enhanced data area offset, in bytes 284b4493eeaSGrégory Soutadé */ 285b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset = 286ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[139]) << 24) + 287ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[138]) << 16) + 288ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[137]) << 8) + 289ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[136])); 290b4493eeaSGrégory Soutadé if (mmc_card_blockaddr(card)) 291b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset <<= 9; 292b4493eeaSGrégory Soutadé /* 293b4493eeaSGrégory Soutadé * calculate the enhanced data area size, in kilobytes 294b4493eeaSGrégory Soutadé */ 295b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size = 296b4493eeaSGrégory Soutadé (ext_csd[142] << 16) + (ext_csd[141] << 8) + 297b4493eeaSGrégory Soutadé ext_csd[140]; 298b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size *= 299b4493eeaSGrégory Soutadé (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 300b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size <<= 9; 301b4493eeaSGrégory Soutadé } else { 302994324bbSGrégory Soutadé pr_warn("%s: defines enhanced area without partition setting complete\n", 303994324bbSGrégory Soutadé mmc_hostname(card->host)); 304994324bbSGrégory Soutadé } 305b4493eeaSGrégory Soutadé } 306b4493eeaSGrégory Soutadé } 307b4493eeaSGrégory Soutadé 308b4493eeaSGrégory Soutadé static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) 309b4493eeaSGrégory Soutadé { 310b4493eeaSGrégory Soutadé int idx; 311994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 312994324bbSGrégory Soutadé unsigned int part_size; 313b4493eeaSGrégory Soutadé 314b4493eeaSGrégory Soutadé /* 315b4493eeaSGrégory Soutadé * General purpose partition feature support -- 316b4493eeaSGrégory Soutadé * If ext_csd has the size of general purpose partitions, 317b4493eeaSGrégory Soutadé * set size, part_cfg, partition name in mmc_part. 318b4493eeaSGrégory Soutadé */ 319b4493eeaSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 320b4493eeaSGrégory Soutadé EXT_CSD_PART_SUPPORT_PART_EN) { 321b4493eeaSGrégory Soutadé hc_erase_grp_sz = 322b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 323b4493eeaSGrégory Soutadé hc_wp_grp_sz = 324b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 325b4493eeaSGrégory Soutadé 326b4493eeaSGrégory Soutadé for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { 327b4493eeaSGrégory Soutadé if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && 328b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && 329b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) 330b4493eeaSGrégory Soutadé continue; 331994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed == 0) { 332994324bbSGrégory Soutadé pr_warn("%s: has partition size defined without partition complete\n", 333994324bbSGrégory Soutadé mmc_hostname(card->host)); 334994324bbSGrégory Soutadé break; 335994324bbSGrégory Soutadé } 336b4493eeaSGrégory Soutadé part_size = 337b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] 338b4493eeaSGrégory Soutadé << 16) + 339b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] 340b4493eeaSGrégory Soutadé << 8) + 341b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; 342b4493eeaSGrégory Soutadé part_size *= (size_t)(hc_erase_grp_sz * 343b4493eeaSGrégory Soutadé hc_wp_grp_sz); 344b4493eeaSGrégory Soutadé mmc_part_add(card, part_size << 19, 345b4493eeaSGrégory Soutadé EXT_CSD_PART_CONFIG_ACC_GP0 + idx, 346b4493eeaSGrégory Soutadé "gp%d", idx, false, 347b4493eeaSGrégory Soutadé MMC_BLK_DATA_AREA_GP); 348b4493eeaSGrégory Soutadé } 349b4493eeaSGrégory Soutadé } 350b4493eeaSGrégory Soutadé } 351b4493eeaSGrégory Soutadé 3521c447116SAdrian Hunter /* Minimum partition switch timeout in milliseconds */ 3531c447116SAdrian Hunter #define MMC_MIN_PART_SWITCH_TIME 300 3541c447116SAdrian Hunter 35508ee80ccSPhilip Rakity /* 35608ee80ccSPhilip Rakity * Decode extended CSD. 35708ee80ccSPhilip Rakity */ 358076ec38aSUlf Hansson static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) 35908ee80ccSPhilip Rakity { 360e0c368d5SNamjae Jeon int err = 0, idx; 361e0c368d5SNamjae Jeon unsigned int part_size; 36281f8a7beSHans de Goede struct device_node *np; 36381f8a7beSHans de Goede bool broken_hpi = false; 36408ee80ccSPhilip Rakity 3656da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 366f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 3676da24b78SKyungmin Park if (card->csd.structure == 3) { 368f39b2dd9SPhilip Rakity if (card->ext_csd.raw_ext_csd_structure > 2) { 369a3c76eb9SGirish K S pr_err("%s: unrecognised EXT_CSD structure " 3708fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 371f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure); 3726da24b78SKyungmin Park err = -EINVAL; 3736da24b78SKyungmin Park goto out; 3746da24b78SKyungmin Park } 3756da24b78SKyungmin Park } 3766da24b78SKyungmin Park 37781f8a7beSHans de Goede np = mmc_of_find_child_device(card->host, 0); 37881f8a7beSHans de Goede if (np && of_device_is_compatible(np, "mmc-card")) 37981f8a7beSHans de Goede broken_hpi = of_property_read_bool(np, "broken-hpi"); 38081f8a7beSHans de Goede of_node_put(np); 38181f8a7beSHans de Goede 38203a59437SRomain Izard /* 38303a59437SRomain Izard * The EXT_CSD format is meant to be forward compatible. As long 38403a59437SRomain Izard * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV 38503a59437SRomain Izard * are authorized, see JEDEC JESD84-B50 section B.8. 38603a59437SRomain Izard */ 3876da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 388d7604d76SPierre Ossman 3895320226aSPratibhasagar V /* fixup device after ext_csd revision field is updated */ 3905320226aSPratibhasagar V mmc_fixup_device(card, mmc_ext_csd_fixups); 3915320226aSPratibhasagar V 392f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 393f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 394f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 395f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 396b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 3977ea239d9SPierre Ossman card->ext_csd.sectors = 3987ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 3997ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 4007ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 4017ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 402fc8a0985SHanumath Prasad 403fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 404fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 4057ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 406d7604d76SPierre Ossman } 40796cf5f02SSeungwon Jeon 40881ac2af6SShawn Lin card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; 409f39b2dd9SPhilip Rakity card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 41096cf5f02SSeungwon Jeon mmc_select_card_type(card); 4117ea239d9SPierre Ossman 412f39b2dd9SPhilip Rakity card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 413f39b2dd9SPhilip Rakity card->ext_csd.raw_erase_timeout_mult = 414f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 415f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_grp_size = 416f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 417b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 418b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 419371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 420371a689fSAndrei Warkentin 421371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 422371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 4231c447116SAdrian Hunter /* Some eMMC set the value too low so set a minimum */ 4241c447116SAdrian Hunter if (card->ext_csd.part_time && 4251c447116SAdrian Hunter card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) 4261c447116SAdrian Hunter card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; 427b1ebe384SJarkko Lavinen 428b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 429b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 430b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 431b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 432dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 433dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 434dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 435dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 436dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 437dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 438f4c5522bSAndrei Warkentin 439f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 440371a689fSAndrei Warkentin 441371a689fSAndrei Warkentin /* 442371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 443371a689fSAndrei Warkentin * multiples of 128K. 444371a689fSAndrei Warkentin */ 445e0c368d5SNamjae Jeon if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 446e0c368d5SNamjae Jeon for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 447e0c368d5SNamjae Jeon part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 448e0c368d5SNamjae Jeon mmc_part_add(card, part_size, 449e0c368d5SNamjae Jeon EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 450add710eaSJohan Rudholm "boot%d", idx, true, 451add710eaSJohan Rudholm MMC_BLK_DATA_AREA_BOOT); 452e0c368d5SNamjae Jeon } 453e0c368d5SNamjae Jeon } 454b1ebe384SJarkko Lavinen } 455b1ebe384SJarkko Lavinen 456f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_gap_size = 457dd13b4edSJurgen Heeks ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 458f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_trim_mult = 459f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_TRIM_MULT]; 460f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_erase_mult = 461f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_ERASE_MULT]; 462f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_feature_support = 463f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 464f39b2dd9SPhilip Rakity card->ext_csd.raw_trim_mult = 465f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_TRIM_MULT]; 466836dc2feSPhilip Rakity card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 467b097e07fSAdrian Hunter card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; 468dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 46969803d4fSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & 47069803d4fSGrégory Soutadé EXT_CSD_PART_SETTING_COMPLETED) 47169803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 1; 47269803d4fSGrégory Soutadé else 47369803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 0; 47469803d4fSGrégory Soutadé 475b4493eeaSGrégory Soutadé mmc_manage_enhanced_area(card, ext_csd); 476709de99dSChuanxiao Dong 477b4493eeaSGrégory Soutadé mmc_manage_gp_partitions(card, ext_csd); 478e0c368d5SNamjae Jeon 479dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 480dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 481dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 482dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 483dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 484dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 485dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 486dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 487add710eaSJohan Rudholm 488add710eaSJohan Rudholm /* 489add710eaSJohan Rudholm * Note that the call to mmc_part_add above defaults to read 490add710eaSJohan Rudholm * only. If this default assumption is changed, the call must 491add710eaSJohan Rudholm * take into account the value of boot_locked below. 492add710eaSJohan Rudholm */ 493add710eaSJohan Rudholm card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; 494add710eaSJohan Rudholm card->ext_csd.boot_ro_lockable = true; 49560443712SFredrik Soderstedt 49660443712SFredrik Soderstedt /* Save power class values */ 49760443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_195 = 49860443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_195]; 49960443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_195 = 50060443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_195]; 50160443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_360 = 50260443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_360]; 50360443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_360 = 50460443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_360]; 50560443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_195 = 50660443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_195]; 50760443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_360 = 50860443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_360]; 50960443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_195 = 51060443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; 51160443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_360 = 51260443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; 5130a5b6438SSeungwon Jeon card->ext_csd.raw_pwr_cl_ddr_200_360 = 5140a5b6438SSeungwon Jeon ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; 515dfe86cbaSAdrian Hunter } 516dfe86cbaSAdrian Hunter 517b2499518SAdrian Hunter if (card->ext_csd.rev >= 5) { 5187c4f10acSRomain Izard /* Adjust production date as per JEDEC JESD84-B451 */ 5197c4f10acSRomain Izard if (card->cid.year < 2010) 5207c4f10acSRomain Izard card->cid.year += 16; 5217c4f10acSRomain Izard 522950d56acSJaehoon Chung /* check whether the eMMC card supports BKOPS */ 5235320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 5245320226aSPratibhasagar V ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { 525950d56acSJaehoon Chung card->ext_csd.bkops = 1; 5260501be64SAlexey Skidanov card->ext_csd.man_bkops_en = 5270501be64SAlexey Skidanov (ext_csd[EXT_CSD_BKOPS_EN] & 5280501be64SAlexey Skidanov EXT_CSD_MANUAL_BKOPS_MASK); 529950d56acSJaehoon Chung card->ext_csd.raw_bkops_status = 530950d56acSJaehoon Chung ext_csd[EXT_CSD_BKOPS_STATUS]; 5310501be64SAlexey Skidanov if (!card->ext_csd.man_bkops_en) 5324ec96b4cSWolfram Sang pr_debug("%s: MAN_BKOPS_EN bit is not set\n", 533950d56acSJaehoon Chung mmc_hostname(card->host)); 534950d56acSJaehoon Chung } 535950d56acSJaehoon Chung 536eb0d8f13SJaehoon Chung /* check whether the eMMC card supports HPI */ 5375320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 5385320226aSPratibhasagar V !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { 539eb0d8f13SJaehoon Chung card->ext_csd.hpi = 1; 540eb0d8f13SJaehoon Chung if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 541eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 542eb0d8f13SJaehoon Chung else 543eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 544eb0d8f13SJaehoon Chung /* 545eb0d8f13SJaehoon Chung * Indicate the maximum timeout to close 546eb0d8f13SJaehoon Chung * a command interrupted by HPI 547eb0d8f13SJaehoon Chung */ 548eb0d8f13SJaehoon Chung card->ext_csd.out_of_int_time = 549eb0d8f13SJaehoon Chung ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 550eb0d8f13SJaehoon Chung } 551eb0d8f13SJaehoon Chung 552f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 553b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 554090d25feSLoic Pallardy 555090d25feSLoic Pallardy /* 556090d25feSLoic Pallardy * RPMB regions are defined in multiples of 128K. 557090d25feSLoic Pallardy */ 558090d25feSLoic Pallardy card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; 559d0123ccaSBalaji T K if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { 560090d25feSLoic Pallardy mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, 561090d25feSLoic Pallardy EXT_CSD_PART_CONFIG_ACC_RPMB, 562090d25feSLoic Pallardy "rpmb", 0, false, 563090d25feSLoic Pallardy MMC_BLK_DATA_AREA_RPMB); 564090d25feSLoic Pallardy } 565b2499518SAdrian Hunter } 566f4c5522bSAndrei Warkentin 5675238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 568dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 569dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 570dfe86cbaSAdrian Hunter else 571dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 572dfe86cbaSAdrian Hunter 573336c716aSSeungwon Jeon /* eMMC v4.5 or later */ 574bec8726aSGirish K S if (card->ext_csd.rev >= 6) { 575336c716aSSeungwon Jeon card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 576336c716aSSeungwon Jeon 577b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 10 * 578b23cf0bdSSeungwon Jeon ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 579bec8726aSGirish K S card->ext_csd.power_off_longtime = 10 * 580bec8726aSGirish K S ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 581b23cf0bdSSeungwon Jeon 582881d1c25SSeungwon Jeon card->ext_csd.cache_size = 583881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 584881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 585881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 586881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 5874265900eSSaugata Das 5884265900eSSaugata Das if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) 5894265900eSSaugata Das card->ext_csd.data_sector_size = 4096; 5904265900eSSaugata Das else 5914265900eSSaugata Das card->ext_csd.data_sector_size = 512; 5924265900eSSaugata Das 5934265900eSSaugata Das if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && 5944265900eSSaugata Das (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { 5954265900eSSaugata Das card->ext_csd.data_tag_unit_size = 5964265900eSSaugata Das ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * 5974265900eSSaugata Das (card->ext_csd.data_sector_size); 5984265900eSSaugata Das } else { 5994265900eSSaugata Das card->ext_csd.data_tag_unit_size = 0; 6004265900eSSaugata Das } 601abd9ac14SSeungwon Jeon 602abd9ac14SSeungwon Jeon card->ext_csd.max_packed_writes = 603abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_WRITES]; 604abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads = 605abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_READS]; 606a5075eb9SSaugata Das } else { 607a5075eb9SSaugata Das card->ext_csd.data_sector_size = 512; 608336c716aSSeungwon Jeon } 609881d1c25SSeungwon Jeon 6100f762426SGwendal Grignou /* eMMC v5 or later */ 6110f762426SGwendal Grignou if (card->ext_csd.rev >= 7) { 6120f762426SGwendal Grignou memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], 6130f762426SGwendal Grignou MMC_FIRMWARE_LEN); 6140f762426SGwendal Grignou card->ext_csd.ffu_capable = 6150f762426SGwendal Grignou (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && 6160f762426SGwendal Grignou !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); 6170f762426SGwendal Grignou } 6187ea239d9SPierre Ossman out: 61908ee80ccSPhilip Rakity return err; 62008ee80ccSPhilip Rakity } 6217ea239d9SPierre Ossman 622076ec38aSUlf Hansson static int mmc_read_ext_csd(struct mmc_card *card) 623076ec38aSUlf Hansson { 624c197787cSUlf Hansson u8 *ext_csd; 625076ec38aSUlf Hansson int err; 626076ec38aSUlf Hansson 627c197787cSUlf Hansson if (!mmc_can_ext_csd(card)) 628c197787cSUlf Hansson return 0; 629c197787cSUlf Hansson 630076ec38aSUlf Hansson err = mmc_get_ext_csd(card, &ext_csd); 631c197787cSUlf Hansson if (err) { 632c197787cSUlf Hansson /* If the host or the card can't do the switch, 633c197787cSUlf Hansson * fail more gracefully. */ 634c197787cSUlf Hansson if ((err != -EINVAL) 635c197787cSUlf Hansson && (err != -ENOSYS) 636c197787cSUlf Hansson && (err != -EFAULT)) 637076ec38aSUlf Hansson return err; 638076ec38aSUlf Hansson 639c197787cSUlf Hansson /* 640c197787cSUlf Hansson * High capacity cards should have this "magic" size 641c197787cSUlf Hansson * stored in their CSD. 642c197787cSUlf Hansson */ 643c197787cSUlf Hansson if (card->csd.capacity == (4096 * 512)) { 644c197787cSUlf Hansson pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", 645c197787cSUlf Hansson mmc_hostname(card->host)); 646c197787cSUlf Hansson } else { 647c197787cSUlf Hansson pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", 648c197787cSUlf Hansson mmc_hostname(card->host)); 649c197787cSUlf Hansson err = 0; 650c197787cSUlf Hansson } 651c197787cSUlf Hansson 652c197787cSUlf Hansson return err; 653c197787cSUlf Hansson } 654c197787cSUlf Hansson 655076ec38aSUlf Hansson err = mmc_decode_ext_csd(card, ext_csd); 656076ec38aSUlf Hansson kfree(ext_csd); 657076ec38aSUlf Hansson return err; 658076ec38aSUlf Hansson } 659076ec38aSUlf Hansson 660f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 66108ee80ccSPhilip Rakity { 66208ee80ccSPhilip Rakity u8 *bw_ext_csd; 66308ee80ccSPhilip Rakity int err; 66408ee80ccSPhilip Rakity 665f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 666f39b2dd9SPhilip Rakity return 0; 66708ee80ccSPhilip Rakity 668f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 669c197787cSUlf Hansson if (err) 670c197787cSUlf Hansson return err; 67108ee80ccSPhilip Rakity 67208ee80ccSPhilip Rakity /* only compare read only fields */ 673dd13b4edSJurgen Heeks err = !((card->ext_csd.raw_partition_support == 67408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 675f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 67608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 677f39b2dd9SPhilip Rakity (card->ext_csd.rev == 67808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 679f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 68008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 681f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 68208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 683f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 68408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 685f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 68608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 687f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 68808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 689f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 69008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 691f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 69208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 693f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 69408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 695f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 69608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 697f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 69808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 699f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 700f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 701f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 702f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 703f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 704f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 705f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 70660443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && 70760443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_195 == 70860443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && 70960443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_195 == 71060443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && 71160443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_360 == 71260443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && 71360443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_360 == 71460443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && 71560443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_195 == 71660443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && 71760443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_360 == 71860443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && 71960443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_195 == 72060443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && 72160443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_360 == 7220a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && 7230a5b6438SSeungwon Jeon (card->ext_csd.raw_pwr_cl_ddr_200_360 == 7240a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); 7250a5b6438SSeungwon Jeon 72608ee80ccSPhilip Rakity if (err) 72708ee80ccSPhilip Rakity err = -EINVAL; 72808ee80ccSPhilip Rakity 72900b41b58SUlf Hansson kfree(bw_ext_csd); 7307ea239d9SPierre Ossman return err; 7317ea239d9SPierre Ossman } 7327ea239d9SPierre Ossman 73351ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 73451ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 73551ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 73651ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 73751ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 738dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 739dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 7400f762426SGwendal Grignou MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); 74151ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 74251ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 74351ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 74451ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 74551e7e8b6SBernie Thompson MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); 74651ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 747709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 748709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 749709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 750188cc042SLoic Pallardy MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); 751188cc042SLoic Pallardy MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); 7525fb06af7SBojan Prtvar MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); 75351ec92e2SPierre Ossman 7540f762426SGwendal Grignou static ssize_t mmc_fwrev_show(struct device *dev, 7550f762426SGwendal Grignou struct device_attribute *attr, 7560f762426SGwendal Grignou char *buf) 7570f762426SGwendal Grignou { 7580f762426SGwendal Grignou struct mmc_card *card = mmc_dev_to_card(dev); 7590f762426SGwendal Grignou 7600f762426SGwendal Grignou if (card->ext_csd.rev < 7) { 7610f762426SGwendal Grignou return sprintf(buf, "0x%x\n", card->cid.fwrev); 7620f762426SGwendal Grignou } else { 7630f762426SGwendal Grignou return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, 7640f762426SGwendal Grignou card->ext_csd.fwrev); 7650f762426SGwendal Grignou } 7660f762426SGwendal Grignou } 7670f762426SGwendal Grignou 7680f762426SGwendal Grignou static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); 7690f762426SGwendal Grignou 7706825a606SBojan Prtvar static ssize_t mmc_dsr_show(struct device *dev, 7716825a606SBojan Prtvar struct device_attribute *attr, 7726825a606SBojan Prtvar char *buf) 7736825a606SBojan Prtvar { 7746825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev); 7756825a606SBojan Prtvar struct mmc_host *host = card->host; 7766825a606SBojan Prtvar 7776825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req) 7786825a606SBojan Prtvar return sprintf(buf, "0x%x\n", host->dsr); 7796825a606SBojan Prtvar else 7806825a606SBojan Prtvar /* return default DSR value */ 7816825a606SBojan Prtvar return sprintf(buf, "0x%x\n", 0x404); 7826825a606SBojan Prtvar } 7836825a606SBojan Prtvar 7846825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 7856825a606SBojan Prtvar 78651ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 78751ec92e2SPierre Ossman &dev_attr_cid.attr, 78851ec92e2SPierre Ossman &dev_attr_csd.attr, 78951ec92e2SPierre Ossman &dev_attr_date.attr, 790dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 791dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 79251ec92e2SPierre Ossman &dev_attr_fwrev.attr, 7930f762426SGwendal Grignou &dev_attr_ffu_capable.attr, 79451ec92e2SPierre Ossman &dev_attr_hwrev.attr, 79551ec92e2SPierre Ossman &dev_attr_manfid.attr, 79651ec92e2SPierre Ossman &dev_attr_name.attr, 79751ec92e2SPierre Ossman &dev_attr_oemid.attr, 79851e7e8b6SBernie Thompson &dev_attr_prv.attr, 79951ec92e2SPierre Ossman &dev_attr_serial.attr, 800709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 801709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 802188cc042SLoic Pallardy &dev_attr_raw_rpmb_size_mult.attr, 803188cc042SLoic Pallardy &dev_attr_rel_sectors.attr, 8045fb06af7SBojan Prtvar &dev_attr_ocr.attr, 8056825a606SBojan Prtvar &dev_attr_dsr.attr, 80651ec92e2SPierre Ossman NULL, 80751ec92e2SPierre Ossman }; 808d1e58212SAxel Lin ATTRIBUTE_GROUPS(mmc_std); 80951ec92e2SPierre Ossman 81051ec92e2SPierre Ossman static struct device_type mmc_type = { 811d1e58212SAxel Lin .groups = mmc_std_groups, 81251ec92e2SPierre Ossman }; 81351ec92e2SPierre Ossman 8147ea239d9SPierre Ossman /* 815b87d8dbfSGirish K S * Select the PowerClass for the current bus width 816b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 817b87d8dbfSGirish K S * extended CSD register, select it by executing the 818b87d8dbfSGirish K S * mmc_switch command. 819b87d8dbfSGirish K S */ 8202385049dSSeungwon Jeon static int __mmc_select_powerclass(struct mmc_card *card, 82160443712SFredrik Soderstedt unsigned int bus_width) 822b87d8dbfSGirish K S { 8232385049dSSeungwon Jeon struct mmc_host *host = card->host; 8242385049dSSeungwon Jeon struct mmc_ext_csd *ext_csd = &card->ext_csd; 82560443712SFredrik Soderstedt unsigned int pwrclass_val = 0; 8262385049dSSeungwon Jeon int err = 0; 827b87d8dbfSGirish K S 828b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 829b87d8dbfSGirish K S case MMC_VDD_165_195: 8302385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 8312385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_195; 8322385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 83360443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 8342385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_195 : 8352385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_195; 8362385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8372385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_200_195; 838b87d8dbfSGirish K S break; 83993fc5a47SSubhash Jadavani case MMC_VDD_27_28: 84093fc5a47SSubhash Jadavani case MMC_VDD_28_29: 84193fc5a47SSubhash Jadavani case MMC_VDD_29_30: 84293fc5a47SSubhash Jadavani case MMC_VDD_30_31: 84393fc5a47SSubhash Jadavani case MMC_VDD_31_32: 844b87d8dbfSGirish K S case MMC_VDD_32_33: 845b87d8dbfSGirish K S case MMC_VDD_33_34: 846b87d8dbfSGirish K S case MMC_VDD_34_35: 847b87d8dbfSGirish K S case MMC_VDD_35_36: 8482385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 8492385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_360; 8502385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 85160443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 8522385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_360 : 8532385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_360; 8542385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8550a5b6438SSeungwon Jeon pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? 8560a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_ddr_200_360 : 8570a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_200_360; 858b87d8dbfSGirish K S break; 859b87d8dbfSGirish K S default: 8606606110dSJoe Perches pr_warn("%s: Voltage range not supported for power class\n", 8616606110dSJoe Perches mmc_hostname(host)); 862b87d8dbfSGirish K S return -EINVAL; 863b87d8dbfSGirish K S } 864b87d8dbfSGirish K S 865b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 866b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 867b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 868b87d8dbfSGirish K S else 869b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 870b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 871b87d8dbfSGirish K S 872b87d8dbfSGirish K S /* If the power class is different from the default value */ 873b87d8dbfSGirish K S if (pwrclass_val > 0) { 874b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 875b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 876b87d8dbfSGirish K S pwrclass_val, 87771fe3eb0SSeungwon Jeon card->ext_csd.generic_cmd6_time); 878b87d8dbfSGirish K S } 879b87d8dbfSGirish K S 880b87d8dbfSGirish K S return err; 881b87d8dbfSGirish K S } 882b87d8dbfSGirish K S 8832385049dSSeungwon Jeon static int mmc_select_powerclass(struct mmc_card *card) 8842385049dSSeungwon Jeon { 8852385049dSSeungwon Jeon struct mmc_host *host = card->host; 8862385049dSSeungwon Jeon u32 bus_width, ext_csd_bits; 8872385049dSSeungwon Jeon int err, ddr; 8882385049dSSeungwon Jeon 8892385049dSSeungwon Jeon /* Power class selection is supported for versions >= 4.0 */ 890148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 8912385049dSSeungwon Jeon return 0; 8922385049dSSeungwon Jeon 8932385049dSSeungwon Jeon bus_width = host->ios.bus_width; 8942385049dSSeungwon Jeon /* Power class values are defined only for 4/8 bit bus */ 8952385049dSSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 8962385049dSSeungwon Jeon return 0; 8972385049dSSeungwon Jeon 8982385049dSSeungwon Jeon ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; 8992385049dSSeungwon Jeon if (ddr) 9002385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 9012385049dSSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 9022385049dSSeungwon Jeon else 9032385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 9042385049dSSeungwon Jeon EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; 9052385049dSSeungwon Jeon 9062385049dSSeungwon Jeon err = __mmc_select_powerclass(card, ext_csd_bits); 9072385049dSSeungwon Jeon if (err) 9082385049dSSeungwon Jeon pr_warn("%s: power class selection to bus width %d ddr %d failed\n", 9092385049dSSeungwon Jeon mmc_hostname(host), 1 << bus_width, ddr); 9102385049dSSeungwon Jeon 9112385049dSSeungwon Jeon return err; 9122385049dSSeungwon Jeon } 9132385049dSSeungwon Jeon 914b87d8dbfSGirish K S /* 915577fb131SSeungwon Jeon * Set the bus speed for the selected speed mode. 916a4924c71SGirish K S */ 917577fb131SSeungwon Jeon static void mmc_set_bus_speed(struct mmc_card *card) 918a4924c71SGirish K S { 919577fb131SSeungwon Jeon unsigned int max_dtr = (unsigned int)-1; 920577fb131SSeungwon Jeon 9210a5b6438SSeungwon Jeon if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 9220a5b6438SSeungwon Jeon max_dtr > card->ext_csd.hs200_max_dtr) 923577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs200_max_dtr; 924577fb131SSeungwon Jeon else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 925577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs_max_dtr; 926577fb131SSeungwon Jeon else if (max_dtr > card->csd.max_dtr) 927577fb131SSeungwon Jeon max_dtr = card->csd.max_dtr; 928577fb131SSeungwon Jeon 929577fb131SSeungwon Jeon mmc_set_clock(card->host, max_dtr); 930577fb131SSeungwon Jeon } 931577fb131SSeungwon Jeon 932577fb131SSeungwon Jeon /* 933577fb131SSeungwon Jeon * Select the bus width amoung 4-bit and 8-bit(SDR). 934577fb131SSeungwon Jeon * If the bus width is changed successfully, return the selected width value. 935577fb131SSeungwon Jeon * Zero is returned instead of error value if the wide width is not supported. 936577fb131SSeungwon Jeon */ 937577fb131SSeungwon Jeon static int mmc_select_bus_width(struct mmc_card *card) 938577fb131SSeungwon Jeon { 939a4924c71SGirish K S static unsigned ext_csd_bits[] = { 940a4924c71SGirish K S EXT_CSD_BUS_WIDTH_8, 941577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH_4, 942a4924c71SGirish K S }; 943a4924c71SGirish K S static unsigned bus_widths[] = { 944a4924c71SGirish K S MMC_BUS_WIDTH_8, 945577fb131SSeungwon Jeon MMC_BUS_WIDTH_4, 946a4924c71SGirish K S }; 947577fb131SSeungwon Jeon struct mmc_host *host = card->host; 948577fb131SSeungwon Jeon unsigned idx, bus_width = 0; 949577fb131SSeungwon Jeon int err = 0; 950a4924c71SGirish K S 9511c2d26e3SAlexandre Belloni if (!mmc_can_ext_csd(card) || 952577fb131SSeungwon Jeon !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) 953577fb131SSeungwon Jeon return 0; 954a4924c71SGirish K S 955577fb131SSeungwon Jeon idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; 956a4924c71SGirish K S 957a4924c71SGirish K S /* 958a4924c71SGirish K S * Unlike SD, MMC cards dont have a configuration register to notify 959a4924c71SGirish K S * supported bus width. So bus test command should be run to identify 960a4924c71SGirish K S * the supported bus width or compare the ext csd values of current 961a4924c71SGirish K S * bus width and ext csd values of 1 bit mode read earlier. 962a4924c71SGirish K S */ 963577fb131SSeungwon Jeon for (; idx < ARRAY_SIZE(bus_widths); idx++) { 964a4924c71SGirish K S /* 965a4924c71SGirish K S * Host is capable of 8bit transfer, then switch 966a4924c71SGirish K S * the device to work in 8bit transfer mode. If the 967a4924c71SGirish K S * mmc switch command returns error then switch to 968a4924c71SGirish K S * 4bit transfer mode. On success set the corresponding 969a4924c71SGirish K S * bus width on the host. 970a4924c71SGirish K S */ 971a4924c71SGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 972a4924c71SGirish K S EXT_CSD_BUS_WIDTH, 973a4924c71SGirish K S ext_csd_bits[idx], 974a4924c71SGirish K S card->ext_csd.generic_cmd6_time); 975a4924c71SGirish K S if (err) 976a4924c71SGirish K S continue; 977a4924c71SGirish K S 978577fb131SSeungwon Jeon bus_width = bus_widths[idx]; 979577fb131SSeungwon Jeon mmc_set_bus_width(host, bus_width); 980a4924c71SGirish K S 981577fb131SSeungwon Jeon /* 982577fb131SSeungwon Jeon * If controller can't handle bus width test, 983577fb131SSeungwon Jeon * compare ext_csd previously read in 1 bit mode 984577fb131SSeungwon Jeon * against ext_csd at new bus width 985577fb131SSeungwon Jeon */ 986a4924c71SGirish K S if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 987577fb131SSeungwon Jeon err = mmc_compare_ext_csds(card, bus_width); 988a4924c71SGirish K S else 989577fb131SSeungwon Jeon err = mmc_bus_test(card, bus_width); 990577fb131SSeungwon Jeon 991577fb131SSeungwon Jeon if (!err) { 992577fb131SSeungwon Jeon err = bus_width; 993a4924c71SGirish K S break; 994577fb131SSeungwon Jeon } else { 995577fb131SSeungwon Jeon pr_warn("%s: switch to bus width %d failed\n", 996ed9feec7SWolfram Sang mmc_hostname(host), 1 << bus_width); 997577fb131SSeungwon Jeon } 998a4924c71SGirish K S } 999a4924c71SGirish K S 1000577fb131SSeungwon Jeon return err; 1001577fb131SSeungwon Jeon } 1002577fb131SSeungwon Jeon 100308573eafSChaotian Jing /* Caller must hold re-tuning */ 100408573eafSChaotian Jing static int mmc_switch_status(struct mmc_card *card) 100508573eafSChaotian Jing { 100608573eafSChaotian Jing u32 status; 100708573eafSChaotian Jing int err; 100808573eafSChaotian Jing 100908573eafSChaotian Jing err = mmc_send_status(card, &status); 101008573eafSChaotian Jing if (err) 101108573eafSChaotian Jing return err; 101208573eafSChaotian Jing 101308573eafSChaotian Jing return mmc_switch_status_error(card->host, status); 101408573eafSChaotian Jing } 101508573eafSChaotian Jing 1016577fb131SSeungwon Jeon /* 1017577fb131SSeungwon Jeon * Switch to the high-speed mode 1018577fb131SSeungwon Jeon */ 1019577fb131SSeungwon Jeon static int mmc_select_hs(struct mmc_card *card) 1020577fb131SSeungwon Jeon { 1021577fb131SSeungwon Jeon int err; 1022577fb131SSeungwon Jeon 10234509f847SUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1024577fb131SSeungwon Jeon EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 102557de31f6SUlf Hansson card->ext_csd.generic_cmd6_time, 102608573eafSChaotian Jing true, false, true); 102708573eafSChaotian Jing if (!err) { 1028577fb131SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 102908573eafSChaotian Jing err = mmc_switch_status(card); 103008573eafSChaotian Jing } 1031577fb131SSeungwon Jeon 103267d35960SJungseung Lee if (err) 103367d35960SJungseung Lee pr_warn("%s: switch to high-speed failed, err:%d\n", 103467d35960SJungseung Lee mmc_hostname(card->host), err); 103567d35960SJungseung Lee 1036577fb131SSeungwon Jeon return err; 1037577fb131SSeungwon Jeon } 1038577fb131SSeungwon Jeon 1039577fb131SSeungwon Jeon /* 1040577fb131SSeungwon Jeon * Activate wide bus and DDR if supported. 1041577fb131SSeungwon Jeon */ 1042577fb131SSeungwon Jeon static int mmc_select_hs_ddr(struct mmc_card *card) 1043577fb131SSeungwon Jeon { 1044577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1045577fb131SSeungwon Jeon u32 bus_width, ext_csd_bits; 1046577fb131SSeungwon Jeon int err = 0; 1047577fb131SSeungwon Jeon 1048577fb131SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) 1049577fb131SSeungwon Jeon return 0; 1050577fb131SSeungwon Jeon 1051577fb131SSeungwon Jeon bus_width = host->ios.bus_width; 1052577fb131SSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 1053577fb131SSeungwon Jeon return 0; 1054577fb131SSeungwon Jeon 1055577fb131SSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 1056577fb131SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 1057577fb131SSeungwon Jeon 1058577fb131SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1059577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH, 1060577fb131SSeungwon Jeon ext_csd_bits, 1061577fb131SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1062577fb131SSeungwon Jeon if (err) { 10634b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width %d ddr failed\n", 1064577fb131SSeungwon Jeon mmc_hostname(host), 1 << bus_width); 1065577fb131SSeungwon Jeon return err; 1066577fb131SSeungwon Jeon } 1067577fb131SSeungwon Jeon 1068577fb131SSeungwon Jeon /* 1069577fb131SSeungwon Jeon * eMMC cards can support 3.3V to 1.2V i/o (vccq) 1070577fb131SSeungwon Jeon * signaling. 1071577fb131SSeungwon Jeon * 1072577fb131SSeungwon Jeon * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 1073577fb131SSeungwon Jeon * 1074577fb131SSeungwon Jeon * 1.8V vccq at 3.3V core voltage (vcc) is not required 1075577fb131SSeungwon Jeon * in the JEDEC spec for DDR. 1076577fb131SSeungwon Jeon * 1077312449efSChuanxiao.Dong * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all 1078312449efSChuanxiao.Dong * host controller can support this, like some of the SDHCI 1079312449efSChuanxiao.Dong * controller which connect to an eMMC device. Some of these 1080312449efSChuanxiao.Dong * host controller still needs to use 1.8v vccq for supporting 1081312449efSChuanxiao.Dong * DDR mode. 1082312449efSChuanxiao.Dong * 1083312449efSChuanxiao.Dong * So the sequence will be: 1084312449efSChuanxiao.Dong * if (host and device can both support 1.2v IO) 1085312449efSChuanxiao.Dong * use 1.2v IO; 1086312449efSChuanxiao.Dong * else if (host and device can both support 1.8v IO) 1087312449efSChuanxiao.Dong * use 1.8v IO; 1088312449efSChuanxiao.Dong * so if host and device can only support 3.3v IO, this is the 1089312449efSChuanxiao.Dong * last choice. 1090577fb131SSeungwon Jeon * 1091577fb131SSeungwon Jeon * WARNING: eMMC rules are NOT the same as SD DDR 1092577fb131SSeungwon Jeon */ 1093312449efSChuanxiao.Dong err = -EINVAL; 1094312449efSChuanxiao.Dong if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 1095312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1096577fb131SSeungwon Jeon 1097312449efSChuanxiao.Dong if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V)) 1098312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1099312449efSChuanxiao.Dong 1100312449efSChuanxiao.Dong /* make sure vccq is 3.3v after switching disaster */ 1101312449efSChuanxiao.Dong if (err) 1102312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1103312449efSChuanxiao.Dong 1104312449efSChuanxiao.Dong if (!err) 1105577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 1106577fb131SSeungwon Jeon 1107577fb131SSeungwon Jeon return err; 1108577fb131SSeungwon Jeon } 1109577fb131SSeungwon Jeon 11100a5b6438SSeungwon Jeon static int mmc_select_hs400(struct mmc_card *card) 11110a5b6438SSeungwon Jeon { 11120a5b6438SSeungwon Jeon struct mmc_host *host = card->host; 111351b12f77SAdrian Hunter unsigned int max_dtr; 11140a5b6438SSeungwon Jeon int err = 0; 1115cc4f414cSAdrian Hunter u8 val; 11160a5b6438SSeungwon Jeon 11170a5b6438SSeungwon Jeon /* 11180a5b6438SSeungwon Jeon * HS400 mode requires 8-bit bus width 11190a5b6438SSeungwon Jeon */ 11200a5b6438SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 11210a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8)) 11220a5b6438SSeungwon Jeon return 0; 11230a5b6438SSeungwon Jeon 112451b12f77SAdrian Hunter /* Switch card to HS mode */ 1125adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 11260a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1127cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 11280a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time, 112908573eafSChaotian Jing true, false, true); 11300a5b6438SSeungwon Jeon if (err) { 11314b75bffcSAndrew Gabbasov pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", 11320a5b6438SSeungwon Jeon mmc_hostname(host), err); 11330a5b6438SSeungwon Jeon return err; 11340a5b6438SSeungwon Jeon } 11350a5b6438SSeungwon Jeon 113651b12f77SAdrian Hunter /* Set host controller to HS timing */ 113751b12f77SAdrian Hunter mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 113851b12f77SAdrian Hunter 1139649c6059SZiyuan Xu /* Reduce frequency to HS frequency */ 1140649c6059SZiyuan Xu max_dtr = card->ext_csd.hs_max_dtr; 1141649c6059SZiyuan Xu mmc_set_clock(host, max_dtr); 1142649c6059SZiyuan Xu 1143d2302933SAdrian Hunter err = mmc_switch_status(card); 1144d2302933SAdrian Hunter if (err) 1145d2302933SAdrian Hunter goto out_err; 1146d2302933SAdrian Hunter 1147d2302933SAdrian Hunter /* Switch card to DDR */ 11480a5b6438SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 11490a5b6438SSeungwon Jeon EXT_CSD_BUS_WIDTH, 11500a5b6438SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8, 11510a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time); 11520a5b6438SSeungwon Jeon if (err) { 11534b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width for hs400 failed, err:%d\n", 11540a5b6438SSeungwon Jeon mmc_hostname(host), err); 11550a5b6438SSeungwon Jeon return err; 11560a5b6438SSeungwon Jeon } 11570a5b6438SSeungwon Jeon 1158d2302933SAdrian Hunter /* Switch card to HS400 */ 1159cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS400 | 1160cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 11610a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1162cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 11630a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time, 116408573eafSChaotian Jing true, false, true); 11650a5b6438SSeungwon Jeon if (err) { 11664b75bffcSAndrew Gabbasov pr_err("%s: switch to hs400 failed, err:%d\n", 11670a5b6438SSeungwon Jeon mmc_hostname(host), err); 11680a5b6438SSeungwon Jeon return err; 11690a5b6438SSeungwon Jeon } 11700a5b6438SSeungwon Jeon 1171d2302933SAdrian Hunter /* Set host controller to HS400 timing and frequency */ 11720a5b6438SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS400); 11730a5b6438SSeungwon Jeon mmc_set_bus_speed(card); 11740a5b6438SSeungwon Jeon 1175d2302933SAdrian Hunter err = mmc_switch_status(card); 1176d2302933SAdrian Hunter if (err) 1177d2302933SAdrian Hunter goto out_err; 1178d2302933SAdrian Hunter 11790a5b6438SSeungwon Jeon return 0; 1180d2302933SAdrian Hunter 1181d2302933SAdrian Hunter out_err: 1182d2302933SAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1183d2302933SAdrian Hunter __func__, err); 1184d2302933SAdrian Hunter return err; 11850a5b6438SSeungwon Jeon } 11860a5b6438SSeungwon Jeon 11876376f69dSAdrian Hunter int mmc_hs200_to_hs400(struct mmc_card *card) 11886376f69dSAdrian Hunter { 11896376f69dSAdrian Hunter return mmc_select_hs400(card); 11906376f69dSAdrian Hunter } 11916376f69dSAdrian Hunter 11926376f69dSAdrian Hunter int mmc_hs400_to_hs200(struct mmc_card *card) 11936376f69dSAdrian Hunter { 11946376f69dSAdrian Hunter struct mmc_host *host = card->host; 11956376f69dSAdrian Hunter unsigned int max_dtr; 11966376f69dSAdrian Hunter int err; 1197cc4f414cSAdrian Hunter u8 val; 11986376f69dSAdrian Hunter 11996376f69dSAdrian Hunter /* Reduce frequency to HS */ 12006376f69dSAdrian Hunter max_dtr = card->ext_csd.hs_max_dtr; 12016376f69dSAdrian Hunter mmc_set_clock(host, max_dtr); 12026376f69dSAdrian Hunter 12036376f69dSAdrian Hunter /* Switch HS400 to HS DDR */ 1204adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 12056376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1206cc4f414cSAdrian Hunter val, card->ext_csd.generic_cmd6_time, 120708573eafSChaotian Jing true, false, true); 12086376f69dSAdrian Hunter if (err) 12096376f69dSAdrian Hunter goto out_err; 12106376f69dSAdrian Hunter 12116376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 12126376f69dSAdrian Hunter 12136376f69dSAdrian Hunter err = mmc_switch_status(card); 12146376f69dSAdrian Hunter if (err) 12156376f69dSAdrian Hunter goto out_err; 12166376f69dSAdrian Hunter 12176376f69dSAdrian Hunter /* Switch HS DDR to HS */ 12186376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 12196376f69dSAdrian Hunter EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, 122008573eafSChaotian Jing true, false, true); 12216376f69dSAdrian Hunter if (err) 12226376f69dSAdrian Hunter goto out_err; 12236376f69dSAdrian Hunter 12246376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS); 12256376f69dSAdrian Hunter 12266376f69dSAdrian Hunter err = mmc_switch_status(card); 12276376f69dSAdrian Hunter if (err) 12286376f69dSAdrian Hunter goto out_err; 12296376f69dSAdrian Hunter 12306376f69dSAdrian Hunter /* Switch HS to HS200 */ 1231cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1232cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 12336376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 123408573eafSChaotian Jing val, card->ext_csd.generic_cmd6_time, 123508573eafSChaotian Jing true, false, true); 12366376f69dSAdrian Hunter if (err) 12376376f69dSAdrian Hunter goto out_err; 12386376f69dSAdrian Hunter 12396376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS200); 12406376f69dSAdrian Hunter 12416376f69dSAdrian Hunter err = mmc_switch_status(card); 12426376f69dSAdrian Hunter if (err) 12436376f69dSAdrian Hunter goto out_err; 12446376f69dSAdrian Hunter 12456376f69dSAdrian Hunter mmc_set_bus_speed(card); 12466376f69dSAdrian Hunter 12476376f69dSAdrian Hunter return 0; 12486376f69dSAdrian Hunter 12496376f69dSAdrian Hunter out_err: 12506376f69dSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 12516376f69dSAdrian Hunter __func__, err); 12526376f69dSAdrian Hunter return err; 12536376f69dSAdrian Hunter } 12546376f69dSAdrian Hunter 125581ac2af6SShawn Lin static int mmc_select_hs400es(struct mmc_card *card) 125681ac2af6SShawn Lin { 125781ac2af6SShawn Lin struct mmc_host *host = card->host; 125881ac2af6SShawn Lin int err = 0; 125981ac2af6SShawn Lin u8 val; 126081ac2af6SShawn Lin 126181ac2af6SShawn Lin if (!(host->caps & MMC_CAP_8_BIT_DATA)) { 126281ac2af6SShawn Lin err = -ENOTSUPP; 126381ac2af6SShawn Lin goto out_err; 126481ac2af6SShawn Lin } 126581ac2af6SShawn Lin 12661720d354SShawn Lin if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) 12671720d354SShawn Lin err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 12681720d354SShawn Lin 12691720d354SShawn Lin if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) 12701720d354SShawn Lin err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 12711720d354SShawn Lin 12721720d354SShawn Lin /* If fails try again during next card power cycle */ 12731720d354SShawn Lin if (err) 12741720d354SShawn Lin goto out_err; 12751720d354SShawn Lin 127681ac2af6SShawn Lin err = mmc_select_bus_width(card); 127781ac2af6SShawn Lin if (err < 0) 127881ac2af6SShawn Lin goto out_err; 127981ac2af6SShawn Lin 128081ac2af6SShawn Lin /* Switch card to HS mode */ 128181ac2af6SShawn Lin err = mmc_select_hs(card); 128267d35960SJungseung Lee if (err) 128381ac2af6SShawn Lin goto out_err; 128481ac2af6SShawn Lin 12854f25580fSShawn Lin mmc_set_clock(host, card->ext_csd.hs_max_dtr); 12864f25580fSShawn Lin 128781ac2af6SShawn Lin err = mmc_switch_status(card); 128881ac2af6SShawn Lin if (err) 128981ac2af6SShawn Lin goto out_err; 129081ac2af6SShawn Lin 129181ac2af6SShawn Lin /* Switch card to DDR with strobe bit */ 129281ac2af6SShawn Lin val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; 129381ac2af6SShawn Lin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 129481ac2af6SShawn Lin EXT_CSD_BUS_WIDTH, 129581ac2af6SShawn Lin val, 129681ac2af6SShawn Lin card->ext_csd.generic_cmd6_time); 129781ac2af6SShawn Lin if (err) { 129881ac2af6SShawn Lin pr_err("%s: switch to bus width for hs400es failed, err:%d\n", 129981ac2af6SShawn Lin mmc_hostname(host), err); 130081ac2af6SShawn Lin goto out_err; 130181ac2af6SShawn Lin } 130281ac2af6SShawn Lin 130381ac2af6SShawn Lin /* Switch card to HS400 */ 130481ac2af6SShawn Lin val = EXT_CSD_TIMING_HS400 | 130581ac2af6SShawn Lin card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 130681ac2af6SShawn Lin err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 130781ac2af6SShawn Lin EXT_CSD_HS_TIMING, val, 130881ac2af6SShawn Lin card->ext_csd.generic_cmd6_time, 130981ac2af6SShawn Lin true, false, true); 131081ac2af6SShawn Lin if (err) { 131181ac2af6SShawn Lin pr_err("%s: switch to hs400es failed, err:%d\n", 131281ac2af6SShawn Lin mmc_hostname(host), err); 131381ac2af6SShawn Lin goto out_err; 131481ac2af6SShawn Lin } 131581ac2af6SShawn Lin 131681ac2af6SShawn Lin /* Set host controller to HS400 timing and frequency */ 131781ac2af6SShawn Lin mmc_set_timing(host, MMC_TIMING_MMC_HS400); 131881ac2af6SShawn Lin 131981ac2af6SShawn Lin /* Controller enable enhanced strobe function */ 132081ac2af6SShawn Lin host->ios.enhanced_strobe = true; 132181ac2af6SShawn Lin if (host->ops->hs400_enhanced_strobe) 132281ac2af6SShawn Lin host->ops->hs400_enhanced_strobe(host, &host->ios); 132381ac2af6SShawn Lin 132481ac2af6SShawn Lin err = mmc_switch_status(card); 132581ac2af6SShawn Lin if (err) 132681ac2af6SShawn Lin goto out_err; 132781ac2af6SShawn Lin 132881ac2af6SShawn Lin return 0; 132981ac2af6SShawn Lin 133081ac2af6SShawn Lin out_err: 133181ac2af6SShawn Lin pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 133281ac2af6SShawn Lin __func__, err); 133381ac2af6SShawn Lin return err; 133481ac2af6SShawn Lin } 133581ac2af6SShawn Lin 1336cc4f414cSAdrian Hunter static void mmc_select_driver_type(struct mmc_card *card) 1337cc4f414cSAdrian Hunter { 1338cc4f414cSAdrian Hunter int card_drv_type, drive_strength, drv_type; 1339cc4f414cSAdrian Hunter 1340cc4f414cSAdrian Hunter card_drv_type = card->ext_csd.raw_driver_strength | 1341cc4f414cSAdrian Hunter mmc_driver_type_mask(0); 1342cc4f414cSAdrian Hunter 1343cc4f414cSAdrian Hunter drive_strength = mmc_select_drive_strength(card, 1344cc4f414cSAdrian Hunter card->ext_csd.hs200_max_dtr, 1345cc4f414cSAdrian Hunter card_drv_type, &drv_type); 1346cc4f414cSAdrian Hunter 1347cc4f414cSAdrian Hunter card->drive_strength = drive_strength; 1348cc4f414cSAdrian Hunter 1349cc4f414cSAdrian Hunter if (drv_type) 1350cc4f414cSAdrian Hunter mmc_set_driver_type(card->host, drv_type); 1351cc4f414cSAdrian Hunter } 1352cc4f414cSAdrian Hunter 1353577fb131SSeungwon Jeon /* 1354577fb131SSeungwon Jeon * For device supporting HS200 mode, the following sequence 1355577fb131SSeungwon Jeon * should be done before executing the tuning process. 1356577fb131SSeungwon Jeon * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) 1357577fb131SSeungwon Jeon * 2. switch to HS200 mode 1358577fb131SSeungwon Jeon * 3. set the clock to > 52Mhz and <=200MHz 1359577fb131SSeungwon Jeon */ 1360577fb131SSeungwon Jeon static int mmc_select_hs200(struct mmc_card *card) 1361577fb131SSeungwon Jeon { 1362577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1363e51534c8SDong Aisheng unsigned int old_timing, old_signal_voltage; 1364577fb131SSeungwon Jeon int err = -EINVAL; 1365cc4f414cSAdrian Hunter u8 val; 1366577fb131SSeungwon Jeon 1367e51534c8SDong Aisheng old_signal_voltage = host->ios.signal_voltage; 1368577fb131SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) 1369577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1370577fb131SSeungwon Jeon 1371577fb131SSeungwon Jeon if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) 1372577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1373577fb131SSeungwon Jeon 1374577fb131SSeungwon Jeon /* If fails try again during next card power cycle */ 1375577fb131SSeungwon Jeon if (err) 1376e51534c8SDong Aisheng return err; 1377577fb131SSeungwon Jeon 1378cc4f414cSAdrian Hunter mmc_select_driver_type(card); 1379cc4f414cSAdrian Hunter 1380577fb131SSeungwon Jeon /* 1381577fb131SSeungwon Jeon * Set the bus width(4 or 8) with host's support and 1382577fb131SSeungwon Jeon * switch to HS200 mode if bus width is set successfully. 1383577fb131SSeungwon Jeon */ 1384577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 13858b7be8f2SPeter Griffin if (err > 0) { 1386cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1387cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1388577fb131SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1389cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 1390577fb131SSeungwon Jeon card->ext_csd.generic_cmd6_time, 139108573eafSChaotian Jing true, false, true); 13921815e61bSAdrian Hunter if (err) 13931815e61bSAdrian Hunter goto err; 13941815e61bSAdrian Hunter old_timing = host->ios.timing; 1395577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS200); 139608573eafSChaotian Jing 13971815e61bSAdrian Hunter err = mmc_switch_status(card); 13981815e61bSAdrian Hunter /* 13991815e61bSAdrian Hunter * mmc_select_timing() assumes timing has not changed if 14001815e61bSAdrian Hunter * it is a switch error. 14011815e61bSAdrian Hunter */ 14021815e61bSAdrian Hunter if (err == -EBADMSG) 14031815e61bSAdrian Hunter mmc_set_timing(host, old_timing); 14041815e61bSAdrian Hunter } 1405a4924c71SGirish K S err: 1406e51534c8SDong Aisheng if (err) { 1407e51534c8SDong Aisheng /* fall back to the old signal voltage, if fails report error */ 1408e51534c8SDong Aisheng if (__mmc_set_signal_voltage(host, old_signal_voltage)) 1409e51534c8SDong Aisheng err = -EIO; 1410e51534c8SDong Aisheng 14111815e61bSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 14121815e61bSAdrian Hunter __func__, err); 1413e51534c8SDong Aisheng } 1414a4924c71SGirish K S return err; 1415a4924c71SGirish K S } 1416a4924c71SGirish K S 1417a4924c71SGirish K S /* 141881ac2af6SShawn Lin * Activate High Speed, HS200 or HS400ES mode if supported. 1419577fb131SSeungwon Jeon */ 1420577fb131SSeungwon Jeon static int mmc_select_timing(struct mmc_card *card) 1421577fb131SSeungwon Jeon { 1422577fb131SSeungwon Jeon int err = 0; 1423577fb131SSeungwon Jeon 1424148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 1425577fb131SSeungwon Jeon goto bus_speed; 1426577fb131SSeungwon Jeon 142781ac2af6SShawn Lin if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) 142881ac2af6SShawn Lin err = mmc_select_hs400es(card); 142981ac2af6SShawn Lin else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) 1430577fb131SSeungwon Jeon err = mmc_select_hs200(card); 1431577fb131SSeungwon Jeon else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) 1432577fb131SSeungwon Jeon err = mmc_select_hs(card); 1433577fb131SSeungwon Jeon 1434577fb131SSeungwon Jeon if (err && err != -EBADMSG) 1435577fb131SSeungwon Jeon return err; 1436577fb131SSeungwon Jeon 1437577fb131SSeungwon Jeon bus_speed: 1438577fb131SSeungwon Jeon /* 1439577fb131SSeungwon Jeon * Set the bus speed to the selected bus timing. 1440577fb131SSeungwon Jeon * If timing is not selected, backward compatible is the default. 1441577fb131SSeungwon Jeon */ 1442577fb131SSeungwon Jeon mmc_set_bus_speed(card); 14430400ed0aSDong Aisheng return 0; 1444577fb131SSeungwon Jeon } 1445577fb131SSeungwon Jeon 1446577fb131SSeungwon Jeon /* 1447577fb131SSeungwon Jeon * Execute tuning sequence to seek the proper bus operating 14480a5b6438SSeungwon Jeon * conditions for HS200 and HS400, which sends CMD21 to the device. 1449577fb131SSeungwon Jeon */ 1450577fb131SSeungwon Jeon static int mmc_hs200_tuning(struct mmc_card *card) 1451577fb131SSeungwon Jeon { 1452577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1453577fb131SSeungwon Jeon 14540a5b6438SSeungwon Jeon /* 14550a5b6438SSeungwon Jeon * Timing should be adjusted to the HS400 target 14560a5b6438SSeungwon Jeon * operation frequency for tuning process 14570a5b6438SSeungwon Jeon */ 14580a5b6438SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 14590a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8) 14600a5b6438SSeungwon Jeon if (host->ops->prepare_hs400_tuning) 14610a5b6438SSeungwon Jeon host->ops->prepare_hs400_tuning(host, &host->ios); 14620a5b6438SSeungwon Jeon 146363e415c6SAdrian Hunter return mmc_execute_tuning(card); 1464577fb131SSeungwon Jeon } 1465577fb131SSeungwon Jeon 1466577fb131SSeungwon Jeon /* 14676abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 14686abaa0c9SPierre Ossman * 14698769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 14706abaa0c9SPierre Ossman * we're trying to reinitialise. 14717ea239d9SPierre Ossman */ 14728c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 14736abaa0c9SPierre Ossman struct mmc_card *oldcard) 14747ea239d9SPierre Ossman { 14757ea239d9SPierre Ossman struct mmc_card *card; 1476577fb131SSeungwon Jeon int err; 14777ea239d9SPierre Ossman u32 cid[4]; 1478b676f039SPhilip Rakity u32 rocr; 14797ea239d9SPierre Ossman 14807ea239d9SPierre Ossman BUG_ON(!host); 1481d84075c8SPierre Ossman WARN_ON(!host->claimed); 14827ea239d9SPierre Ossman 148344669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 148444669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 148544669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 148644669034SStefan Nilsson XK 14877ea239d9SPierre Ossman /* 14887ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 14897ea239d9SPierre Ossman * need to tell some cards to go back to the idle 14907ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 14917ea239d9SPierre Ossman * respond. 1492c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 14937ea239d9SPierre Ossman */ 14947ea239d9SPierre Ossman mmc_go_idle(host); 14957ea239d9SPierre Ossman 14967ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 1497b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 149817b0429dSPierre Ossman if (err) 14996abaa0c9SPierre Ossman goto err; 15007ea239d9SPierre Ossman 15017ea239d9SPierre Ossman /* 1502af517150SDavid Brownell * For SPI, enable CRC as appropriate. 1503af517150SDavid Brownell */ 1504af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1505af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 1506af517150SDavid Brownell if (err) 1507af517150SDavid Brownell goto err; 1508af517150SDavid Brownell } 1509af517150SDavid Brownell 1510af517150SDavid Brownell /* 15117ea239d9SPierre Ossman * Fetch CID from card. 15127ea239d9SPierre Ossman */ 1513af517150SDavid Brownell if (mmc_host_is_spi(host)) 1514af517150SDavid Brownell err = mmc_send_cid(host, cid); 1515af517150SDavid Brownell else 15167ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 151717b0429dSPierre Ossman if (err) 15187ea239d9SPierre Ossman goto err; 15197ea239d9SPierre Ossman 15206abaa0c9SPierre Ossman if (oldcard) { 1521adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1522adf66a0dSPierre Ossman err = -ENOENT; 15236abaa0c9SPierre Ossman goto err; 1524adf66a0dSPierre Ossman } 15256abaa0c9SPierre Ossman 15266abaa0c9SPierre Ossman card = oldcard; 15276abaa0c9SPierre Ossman } else { 15287ea239d9SPierre Ossman /* 15297ea239d9SPierre Ossman * Allocate card structure. 15307ea239d9SPierre Ossman */ 153151ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 1532adf66a0dSPierre Ossman if (IS_ERR(card)) { 1533adf66a0dSPierre Ossman err = PTR_ERR(card); 15347ea239d9SPierre Ossman goto err; 1535adf66a0dSPierre Ossman } 15367ea239d9SPierre Ossman 153769041150SUlf Hansson card->ocr = ocr; 15387ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 15397ea239d9SPierre Ossman card->rca = 1; 15407ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 15416abaa0c9SPierre Ossman } 15427ea239d9SPierre Ossman 15437ea239d9SPierre Ossman /* 1544eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 1545eac86321SDoug Anderson */ 1546eac86321SDoug Anderson if (host->ops->init_card) 1547eac86321SDoug Anderson host->ops->init_card(host, card); 1548eac86321SDoug Anderson 1549eac86321SDoug Anderson /* 1550af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 15517ea239d9SPierre Ossman */ 1552af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15537ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 155417b0429dSPierre Ossman if (err) 15557ea239d9SPierre Ossman goto free_card; 15567ea239d9SPierre Ossman 15577ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 1558af517150SDavid Brownell } 15597ea239d9SPierre Ossman 15606abaa0c9SPierre Ossman if (!oldcard) { 15617ea239d9SPierre Ossman /* 15627ea239d9SPierre Ossman * Fetch CSD from card. 15637ea239d9SPierre Ossman */ 15647ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 156517b0429dSPierre Ossman if (err) 15667ea239d9SPierre Ossman goto free_card; 15677ea239d9SPierre Ossman 1568bd766312SPierre Ossman err = mmc_decode_csd(card); 1569adf66a0dSPierre Ossman if (err) 1570bd766312SPierre Ossman goto free_card; 1571bd766312SPierre Ossman err = mmc_decode_cid(card); 1572adf66a0dSPierre Ossman if (err) 1573bd766312SPierre Ossman goto free_card; 15746abaa0c9SPierre Ossman } 15757ea239d9SPierre Ossman 15767ea239d9SPierre Ossman /* 15773d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 15783d705d14SSascha Hauer * DSR configuration 15793d705d14SSascha Hauer */ 15803d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 15813d705d14SSascha Hauer mmc_set_dsr(host); 15823d705d14SSascha Hauer 15833d705d14SSascha Hauer /* 158489a73cf5SPierre Ossman * Select card, as all following commands rely on that. 15857ea239d9SPierre Ossman */ 1586af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15877ea239d9SPierre Ossman err = mmc_select_card(card); 158817b0429dSPierre Ossman if (err) 15897ea239d9SPierre Ossman goto free_card; 1590af517150SDavid Brownell } 15917ea239d9SPierre Ossman 15926abaa0c9SPierre Ossman if (!oldcard) { 1593076ec38aSUlf Hansson /* Read extended CSD. */ 1594076ec38aSUlf Hansson err = mmc_read_ext_csd(card); 159517b0429dSPierre Ossman if (err) 15967ea239d9SPierre Ossman goto free_card; 1597b676f039SPhilip Rakity 159887e88659SMasahiro Yamada /* 159987e88659SMasahiro Yamada * If doing byte addressing, check if required to do sector 1600b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 1601b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 1602b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 1603b676f039SPhilip Rakity */ 160487e88659SMasahiro Yamada if (rocr & BIT(30)) 1605b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 1606b676f039SPhilip Rakity 1607dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 1608dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 16096abaa0c9SPierre Ossman } 16107ea239d9SPierre Ossman 16117ea239d9SPierre Ossman /* 1612709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 1613709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 1614709de99dSChuanxiao Dong */ 161569803d4fSGrégory Soutadé if (card->ext_csd.partition_setting_completed || 161683bb24aaSAdrian Hunter (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { 1617709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1618b23cf0bdSSeungwon Jeon EXT_CSD_ERASE_GROUP_DEF, 1, 1619b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1620709de99dSChuanxiao Dong 1621709de99dSChuanxiao Dong if (err && err != -EBADMSG) 1622709de99dSChuanxiao Dong goto free_card; 1623709de99dSChuanxiao Dong 1624709de99dSChuanxiao Dong if (err) { 1625709de99dSChuanxiao Dong err = 0; 1626709de99dSChuanxiao Dong /* 1627709de99dSChuanxiao Dong * Just disable enhanced area off & sz 1628709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 1629709de99dSChuanxiao Dong * during next time reinit 1630709de99dSChuanxiao Dong */ 1631709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 1632709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 1633709de99dSChuanxiao Dong } else { 1634709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 1635709de99dSChuanxiao Dong /* 1636709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 1637709de99dSChuanxiao Dong * This will affect the erase size, so 1638709de99dSChuanxiao Dong * here need to reset erase size 1639709de99dSChuanxiao Dong */ 1640709de99dSChuanxiao Dong mmc_set_erase_size(card); 1641709de99dSChuanxiao Dong } 1642709de99dSChuanxiao Dong } 1643709de99dSChuanxiao Dong 1644709de99dSChuanxiao Dong /* 164541e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 164641e2a489SPhilip Rakity */ 1647371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 1648371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 1649371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 1650371a689fSAndrei Warkentin card->ext_csd.part_config, 1651371a689fSAndrei Warkentin card->ext_csd.part_time); 1652371a689fSAndrei Warkentin if (err && err != -EBADMSG) 1653371a689fSAndrei Warkentin goto free_card; 165441e2a489SPhilip Rakity } 165541e2a489SPhilip Rakity 165641e2a489SPhilip Rakity /* 165743235679SUlf Hansson * Enable power_off_notification byte in the ext_csd register 1658bec8726aSGirish K S */ 165943235679SUlf Hansson if (card->ext_csd.rev >= 6) { 1660bec8726aSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1661bec8726aSGirish K S EXT_CSD_POWER_OFF_NOTIFICATION, 1662bec8726aSGirish K S EXT_CSD_POWER_ON, 1663bec8726aSGirish K S card->ext_csd.generic_cmd6_time); 1664bec8726aSGirish K S if (err && err != -EBADMSG) 1665bec8726aSGirish K S goto free_card; 1666bec8726aSGirish K S 166796a85d54SGirish K S /* 166896a85d54SGirish K S * The err can be -EBADMSG or 0, 166996a85d54SGirish K S * so check for success and update the flag 167096a85d54SGirish K S */ 1671bec8726aSGirish K S if (!err) 1672e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; 167396a85d54SGirish K S } 1674bec8726aSGirish K S 1675bec8726aSGirish K S /* 1676577fb131SSeungwon Jeon * Select timing interface 167789a73cf5SPierre Ossman */ 1678577fb131SSeungwon Jeon err = mmc_select_timing(card); 1679577fb131SSeungwon Jeon if (err) 168089a73cf5SPierre Ossman goto free_card; 168189a73cf5SPierre Ossman 1682a4924c71SGirish K S if (mmc_card_hs200(card)) { 1683577fb131SSeungwon Jeon err = mmc_hs200_tuning(card); 16844c4cb171SPhilip Rakity if (err) 16854b75bffcSAndrew Gabbasov goto free_card; 16860a5b6438SSeungwon Jeon 16870a5b6438SSeungwon Jeon err = mmc_select_hs400(card); 16880a5b6438SSeungwon Jeon if (err) 16894b75bffcSAndrew Gabbasov goto free_card; 1690577fb131SSeungwon Jeon } else if (mmc_card_hs(card)) { 1691577fb131SSeungwon Jeon /* Select the desired bus width optionally */ 1692577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 16938b7be8f2SPeter Griffin if (err > 0) { 1694577fb131SSeungwon Jeon err = mmc_select_hs_ddr(card); 1695577fb131SSeungwon Jeon if (err) 16964b75bffcSAndrew Gabbasov goto free_card; 169789a73cf5SPierre Ossman } 1698ef0b27d4SAdrian Hunter } 169989a73cf5SPierre Ossman 1700881d1c25SSeungwon Jeon /* 17012385049dSSeungwon Jeon * Choose the power class with selected bus interface 17022385049dSSeungwon Jeon */ 17032385049dSSeungwon Jeon mmc_select_powerclass(card); 17042385049dSSeungwon Jeon 17052385049dSSeungwon Jeon /* 170652d0974eSSubhash Jadavani * Enable HPI feature (if supported) 170752d0974eSSubhash Jadavani */ 170852d0974eSSubhash Jadavani if (card->ext_csd.hpi) { 170952d0974eSSubhash Jadavani err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 171052d0974eSSubhash Jadavani EXT_CSD_HPI_MGMT, 1, 171152d0974eSSubhash Jadavani card->ext_csd.generic_cmd6_time); 171252d0974eSSubhash Jadavani if (err && err != -EBADMSG) 171352d0974eSSubhash Jadavani goto free_card; 171452d0974eSSubhash Jadavani if (err) { 17156606110dSJoe Perches pr_warn("%s: Enabling HPI failed\n", 171652d0974eSSubhash Jadavani mmc_hostname(card->host)); 171752d0974eSSubhash Jadavani err = 0; 171852d0974eSSubhash Jadavani } else 171952d0974eSSubhash Jadavani card->ext_csd.hpi_en = 1; 172052d0974eSSubhash Jadavani } 172152d0974eSSubhash Jadavani 172252d0974eSSubhash Jadavani /* 1723881d1c25SSeungwon Jeon * If cache size is higher than 0, this indicates 1724881d1c25SSeungwon Jeon * the existence of cache and it can be turned on. 1725881d1c25SSeungwon Jeon */ 17265320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 17275320226aSPratibhasagar V card->ext_csd.cache_size > 0) { 1728881d1c25SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 17298bc0678bSSeungwon Jeon EXT_CSD_CACHE_CTRL, 1, 17308bc0678bSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1731881d1c25SSeungwon Jeon if (err && err != -EBADMSG) 1732881d1c25SSeungwon Jeon goto free_card; 1733881d1c25SSeungwon Jeon 1734881d1c25SSeungwon Jeon /* 1735881d1c25SSeungwon Jeon * Only if no error, cache is turned on successfully. 1736881d1c25SSeungwon Jeon */ 17378bc0678bSSeungwon Jeon if (err) { 17386606110dSJoe Perches pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", 17398bc0678bSSeungwon Jeon mmc_hostname(card->host), err); 17408bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 0; 17418bc0678bSSeungwon Jeon err = 0; 17428bc0678bSSeungwon Jeon } else { 17438bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 1; 17448bc0678bSSeungwon Jeon } 1745881d1c25SSeungwon Jeon } 1746881d1c25SSeungwon Jeon 1747abd9ac14SSeungwon Jeon /* 1748abd9ac14SSeungwon Jeon * The mandatory minimum values are defined for packed command. 1749abd9ac14SSeungwon Jeon * read: 5, write: 3 1750abd9ac14SSeungwon Jeon */ 1751abd9ac14SSeungwon Jeon if (card->ext_csd.max_packed_writes >= 3 && 1752abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads >= 5 && 1753abd9ac14SSeungwon Jeon host->caps2 & MMC_CAP2_PACKED_CMD) { 1754abd9ac14SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1755abd9ac14SSeungwon Jeon EXT_CSD_EXP_EVENTS_CTRL, 1756abd9ac14SSeungwon Jeon EXT_CSD_PACKED_EVENT_EN, 1757abd9ac14SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1758abd9ac14SSeungwon Jeon if (err && err != -EBADMSG) 1759abd9ac14SSeungwon Jeon goto free_card; 1760abd9ac14SSeungwon Jeon if (err) { 1761abd9ac14SSeungwon Jeon pr_warn("%s: Enabling packed event failed\n", 1762abd9ac14SSeungwon Jeon mmc_hostname(card->host)); 1763abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 0; 1764abd9ac14SSeungwon Jeon err = 0; 1765abd9ac14SSeungwon Jeon } else { 1766abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 1; 1767abd9ac14SSeungwon Jeon } 1768abd9ac14SSeungwon Jeon } 1769abd9ac14SSeungwon Jeon 17706abaa0c9SPierre Ossman if (!oldcard) 17717ea239d9SPierre Ossman host->card = card; 17727ea239d9SPierre Ossman 177317b0429dSPierre Ossman return 0; 17746abaa0c9SPierre Ossman 17756abaa0c9SPierre Ossman free_card: 17766abaa0c9SPierre Ossman if (!oldcard) 17776abaa0c9SPierre Ossman mmc_remove_card(card); 17786abaa0c9SPierre Ossman err: 1779adf66a0dSPierre Ossman return err; 17806abaa0c9SPierre Ossman } 17816abaa0c9SPierre Ossman 178207a68216SUlf Hansson static int mmc_can_sleep(struct mmc_card *card) 178307a68216SUlf Hansson { 178407a68216SUlf Hansson return (card && card->ext_csd.rev >= 3); 178507a68216SUlf Hansson } 178607a68216SUlf Hansson 178707a68216SUlf Hansson static int mmc_sleep(struct mmc_host *host) 178807a68216SUlf Hansson { 178907a68216SUlf Hansson struct mmc_command cmd = {0}; 179007a68216SUlf Hansson struct mmc_card *card = host->card; 1791cb962e04SUlf Hansson unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); 179207a68216SUlf Hansson int err; 179307a68216SUlf Hansson 1794436f8daaSAdrian Hunter /* Re-tuning can't be done once the card is deselected */ 1795436f8daaSAdrian Hunter mmc_retune_hold(host); 1796436f8daaSAdrian Hunter 179707a68216SUlf Hansson err = mmc_deselect_cards(host); 179807a68216SUlf Hansson if (err) 1799436f8daaSAdrian Hunter goto out_release; 180007a68216SUlf Hansson 180107a68216SUlf Hansson cmd.opcode = MMC_SLEEP_AWAKE; 180207a68216SUlf Hansson cmd.arg = card->rca << 16; 180307a68216SUlf Hansson cmd.arg |= 1 << 15; 180407a68216SUlf Hansson 1805cb962e04SUlf Hansson /* 1806cb962e04SUlf Hansson * If the max_busy_timeout of the host is specified, validate it against 1807cb962e04SUlf Hansson * the sleep cmd timeout. A failure means we need to prevent the host 1808cb962e04SUlf Hansson * from doing hw busy detection, which is done by converting to a R1 1809cb962e04SUlf Hansson * response instead of a R1B. 1810cb962e04SUlf Hansson */ 1811cb962e04SUlf Hansson if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { 1812cb962e04SUlf Hansson cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1813cb962e04SUlf Hansson } else { 181407a68216SUlf Hansson cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 1815cb962e04SUlf Hansson cmd.busy_timeout = timeout_ms; 1816cb962e04SUlf Hansson } 1817cb962e04SUlf Hansson 181807a68216SUlf Hansson err = mmc_wait_for_cmd(host, &cmd, 0); 181907a68216SUlf Hansson if (err) 1820436f8daaSAdrian Hunter goto out_release; 182107a68216SUlf Hansson 182207a68216SUlf Hansson /* 182307a68216SUlf Hansson * If the host does not wait while the card signals busy, then we will 182407a68216SUlf Hansson * will have to wait the sleep/awake timeout. Note, we cannot use the 182507a68216SUlf Hansson * SEND_STATUS command to poll the status because that command (and most 182607a68216SUlf Hansson * others) is invalid while the card sleeps. 182707a68216SUlf Hansson */ 1828cb962e04SUlf Hansson if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) 1829cb962e04SUlf Hansson mmc_delay(timeout_ms); 183007a68216SUlf Hansson 1831436f8daaSAdrian Hunter out_release: 1832436f8daaSAdrian Hunter mmc_retune_release(host); 183307a68216SUlf Hansson return err; 183407a68216SUlf Hansson } 183507a68216SUlf Hansson 1836e6c08586SUlf Hansson static int mmc_can_poweroff_notify(const struct mmc_card *card) 1837e6c08586SUlf Hansson { 1838e6c08586SUlf Hansson return card && 1839e6c08586SUlf Hansson mmc_card_mmc(card) && 1840e6c08586SUlf Hansson (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); 1841e6c08586SUlf Hansson } 1842e6c08586SUlf Hansson 1843e6c08586SUlf Hansson static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) 1844e6c08586SUlf Hansson { 1845e6c08586SUlf Hansson unsigned int timeout = card->ext_csd.generic_cmd6_time; 1846e6c08586SUlf Hansson int err; 1847e6c08586SUlf Hansson 1848e6c08586SUlf Hansson /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ 1849e6c08586SUlf Hansson if (notify_type == EXT_CSD_POWER_OFF_LONG) 1850e6c08586SUlf Hansson timeout = card->ext_csd.power_off_longtime; 1851e6c08586SUlf Hansson 1852878e200bSUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1853e6c08586SUlf Hansson EXT_CSD_POWER_OFF_NOTIFICATION, 18544509f847SUlf Hansson notify_type, timeout, true, false, false); 1855e6c08586SUlf Hansson if (err) 1856e6c08586SUlf Hansson pr_err("%s: Power Off Notification timed out, %u\n", 1857e6c08586SUlf Hansson mmc_hostname(card->host), timeout); 1858e6c08586SUlf Hansson 1859e6c08586SUlf Hansson /* Disable the power off notification after the switch operation. */ 1860e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; 1861e6c08586SUlf Hansson 1862e6c08586SUlf Hansson return err; 1863e6c08586SUlf Hansson } 1864e6c08586SUlf Hansson 18656abaa0c9SPierre Ossman /* 18666abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 18676abaa0c9SPierre Ossman */ 18686abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 18696abaa0c9SPierre Ossman { 18706abaa0c9SPierre Ossman BUG_ON(!host); 18716abaa0c9SPierre Ossman BUG_ON(!host->card); 18726abaa0c9SPierre Ossman 18736abaa0c9SPierre Ossman mmc_remove_card(host->card); 18746abaa0c9SPierre Ossman host->card = NULL; 18756abaa0c9SPierre Ossman } 18766abaa0c9SPierre Ossman 18776abaa0c9SPierre Ossman /* 1878d3049504SAdrian Hunter * Card detection - card is alive. 1879d3049504SAdrian Hunter */ 1880d3049504SAdrian Hunter static int mmc_alive(struct mmc_host *host) 1881d3049504SAdrian Hunter { 1882d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1883d3049504SAdrian Hunter } 1884d3049504SAdrian Hunter 1885d3049504SAdrian Hunter /* 18866abaa0c9SPierre Ossman * Card detection callback from host. 18876abaa0c9SPierre Ossman */ 18886abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 18896abaa0c9SPierre Ossman { 18906abaa0c9SPierre Ossman int err; 18916abaa0c9SPierre Ossman 18926abaa0c9SPierre Ossman BUG_ON(!host); 18936abaa0c9SPierre Ossman BUG_ON(!host->card); 18946abaa0c9SPierre Ossman 1895e94cfef6SUlf Hansson mmc_get_card(host->card); 18966abaa0c9SPierre Ossman 18976abaa0c9SPierre Ossman /* 18986abaa0c9SPierre Ossman * Just check if our card has been removed. 18996abaa0c9SPierre Ossman */ 1900d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 19016abaa0c9SPierre Ossman 1902e94cfef6SUlf Hansson mmc_put_card(host->card); 19037ea239d9SPierre Ossman 190417b0429dSPierre Ossman if (err) { 19054101c16aSPierre Ossman mmc_remove(host); 19066abaa0c9SPierre Ossman 19076abaa0c9SPierre Ossman mmc_claim_host(host); 19086abaa0c9SPierre Ossman mmc_detach_bus(host); 19097f7e4129SUlf Hansson mmc_power_off(host); 19106abaa0c9SPierre Ossman mmc_release_host(host); 19116abaa0c9SPierre Ossman } 19126abaa0c9SPierre Ossman } 19136abaa0c9SPierre Ossman 191403d071fcSUlf Hansson static int _mmc_suspend(struct mmc_host *host, bool is_suspend) 19156abaa0c9SPierre Ossman { 1916c3805467SBalaji T K int err = 0; 191703d071fcSUlf Hansson unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : 191803d071fcSUlf Hansson EXT_CSD_POWER_OFF_LONG; 1919c3805467SBalaji T K 19206abaa0c9SPierre Ossman BUG_ON(!host); 19216abaa0c9SPierre Ossman BUG_ON(!host->card); 19226abaa0c9SPierre Ossman 19236abaa0c9SPierre Ossman mmc_claim_host(host); 1924881d926dSMaya Erez 19259ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 19269ec775f7SUlf Hansson goto out; 19279ec775f7SUlf Hansson 192839b9431bSUlf Hansson if (mmc_card_doing_bkops(host->card)) { 192939b9431bSUlf Hansson err = mmc_stop_bkops(host->card); 193039b9431bSUlf Hansson if (err) 193139b9431bSUlf Hansson goto out; 193239b9431bSUlf Hansson } 193339b9431bSUlf Hansson 193410e5d965SUlf Hansson err = mmc_flush_cache(host->card); 1935881d926dSMaya Erez if (err) 1936881d926dSMaya Erez goto out; 1937881d926dSMaya Erez 193843235679SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 193953275c21SUlf Hansson ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend)) 194003d071fcSUlf Hansson err = mmc_poweroff_notify(host->card, notify_type); 194107a68216SUlf Hansson else if (mmc_can_sleep(host->card)) 194207a68216SUlf Hansson err = mmc_sleep(host); 1943e6c08586SUlf Hansson else if (!mmc_host_is_spi(host)) 194485e727edSJaehoon Chung err = mmc_deselect_cards(host); 194595cdfb72SNicolas Pitre 19469ec775f7SUlf Hansson if (!err) { 194774590263SUlf Hansson mmc_power_off(host); 19489ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 19499ec775f7SUlf Hansson } 1950881d926dSMaya Erez out: 1951881d926dSMaya Erez mmc_release_host(host); 1952c3805467SBalaji T K return err; 19536abaa0c9SPierre Ossman } 19546abaa0c9SPierre Ossman 19556abaa0c9SPierre Ossman /* 19560cb403a2SUlf Hansson * Suspend callback 195703d071fcSUlf Hansson */ 195803d071fcSUlf Hansson static int mmc_suspend(struct mmc_host *host) 195903d071fcSUlf Hansson { 19600cb403a2SUlf Hansson int err; 19610cb403a2SUlf Hansson 19620cb403a2SUlf Hansson err = _mmc_suspend(host, true); 19630cb403a2SUlf Hansson if (!err) { 19640cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 19650cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 19660cb403a2SUlf Hansson } 19670cb403a2SUlf Hansson 19680cb403a2SUlf Hansson return err; 196903d071fcSUlf Hansson } 197003d071fcSUlf Hansson 197103d071fcSUlf Hansson /* 19726abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 19736abaa0c9SPierre Ossman * and, if so, restore all state to it. 19746abaa0c9SPierre Ossman */ 19750cb403a2SUlf Hansson static int _mmc_resume(struct mmc_host *host) 19766abaa0c9SPierre Ossman { 19779ec775f7SUlf Hansson int err = 0; 19786abaa0c9SPierre Ossman 19796abaa0c9SPierre Ossman BUG_ON(!host); 19806abaa0c9SPierre Ossman BUG_ON(!host->card); 19816abaa0c9SPierre Ossman 19826abaa0c9SPierre Ossman mmc_claim_host(host); 19839ec775f7SUlf Hansson 19849ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 19859ec775f7SUlf Hansson goto out; 19869ec775f7SUlf Hansson 198769041150SUlf Hansson mmc_power_up(host, host->card->ocr); 198869041150SUlf Hansson err = mmc_init_card(host, host->card->ocr, host->card); 19899ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 19902986d0bfSPierre Ossman 19919ec775f7SUlf Hansson out: 19929ec775f7SUlf Hansson mmc_release_host(host); 199395cdfb72SNicolas Pitre return err; 19946abaa0c9SPierre Ossman } 19956abaa0c9SPierre Ossman 19969ec775f7SUlf Hansson /* 19979ec775f7SUlf Hansson * Shutdown callback 19989ec775f7SUlf Hansson */ 19999ec775f7SUlf Hansson static int mmc_shutdown(struct mmc_host *host) 20009ec775f7SUlf Hansson { 20019ec775f7SUlf Hansson int err = 0; 20029ec775f7SUlf Hansson 20039ec775f7SUlf Hansson /* 20049ec775f7SUlf Hansson * In a specific case for poweroff notify, we need to resume the card 20059ec775f7SUlf Hansson * before we can shutdown it properly. 20069ec775f7SUlf Hansson */ 20079ec775f7SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 20089ec775f7SUlf Hansson !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) 20090cb403a2SUlf Hansson err = _mmc_resume(host); 20109ec775f7SUlf Hansson 20119ec775f7SUlf Hansson if (!err) 20129ec775f7SUlf Hansson err = _mmc_suspend(host, false); 20139ec775f7SUlf Hansson 20149ec775f7SUlf Hansson return err; 20159ec775f7SUlf Hansson } 2016c4d770d7SUlf Hansson 2017c4d770d7SUlf Hansson /* 20180cb403a2SUlf Hansson * Callback for resume. 20190cb403a2SUlf Hansson */ 20200cb403a2SUlf Hansson static int mmc_resume(struct mmc_host *host) 20210cb403a2SUlf Hansson { 20220cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 2023c29536e8SUlf Hansson return 0; 20240cb403a2SUlf Hansson } 20250cb403a2SUlf Hansson 20260cb403a2SUlf Hansson /* 2027c4d770d7SUlf Hansson * Callback for runtime_suspend. 2028c4d770d7SUlf Hansson */ 2029c4d770d7SUlf Hansson static int mmc_runtime_suspend(struct mmc_host *host) 2030c4d770d7SUlf Hansson { 2031c4d770d7SUlf Hansson int err; 2032c4d770d7SUlf Hansson 2033c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 2034c4d770d7SUlf Hansson return 0; 2035c4d770d7SUlf Hansson 20360cb403a2SUlf Hansson err = _mmc_suspend(host, true); 20370cc81a8cSUlf Hansson if (err) 2038f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 2039c4d770d7SUlf Hansson mmc_hostname(host), err); 2040c4d770d7SUlf Hansson 2041c4d770d7SUlf Hansson return err; 2042c4d770d7SUlf Hansson } 2043c4d770d7SUlf Hansson 2044c4d770d7SUlf Hansson /* 2045c4d770d7SUlf Hansson * Callback for runtime_resume. 2046c4d770d7SUlf Hansson */ 2047c4d770d7SUlf Hansson static int mmc_runtime_resume(struct mmc_host *host) 2048c4d770d7SUlf Hansson { 2049c4d770d7SUlf Hansson int err; 2050c4d770d7SUlf Hansson 20510cb403a2SUlf Hansson err = _mmc_resume(host); 2052520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 2053c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 2054c4d770d7SUlf Hansson mmc_hostname(host), err); 2055c4d770d7SUlf Hansson 2056c4d770d7SUlf Hansson return 0; 2057c4d770d7SUlf Hansson } 2058c4d770d7SUlf Hansson 2059f855a371SJohan Rudholm int mmc_can_reset(struct mmc_card *card) 2060f855a371SJohan Rudholm { 2061f855a371SJohan Rudholm u8 rst_n_function; 2062f855a371SJohan Rudholm 2063f855a371SJohan Rudholm rst_n_function = card->ext_csd.rst_n_function; 2064f855a371SJohan Rudholm if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) 2065f855a371SJohan Rudholm return 0; 2066f855a371SJohan Rudholm return 1; 2067f855a371SJohan Rudholm } 2068f855a371SJohan Rudholm EXPORT_SYMBOL(mmc_can_reset); 2069f855a371SJohan Rudholm 2070f855a371SJohan Rudholm static int mmc_reset(struct mmc_host *host) 2071f855a371SJohan Rudholm { 2072f855a371SJohan Rudholm struct mmc_card *card = host->card; 2073f855a371SJohan Rudholm 2074437db4c6SAdrian Hunter /* 2075437db4c6SAdrian Hunter * In the case of recovery, we can't expect flushing the cache to work 2076437db4c6SAdrian Hunter * always, but we have a go and ignore errors. 2077437db4c6SAdrian Hunter */ 2078437db4c6SAdrian Hunter mmc_flush_cache(host->card); 2079437db4c6SAdrian Hunter 20804e6c7178SGwendal Grignou if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset && 20814e6c7178SGwendal Grignou mmc_can_reset(card)) { 20824e6c7178SGwendal Grignou /* If the card accept RST_n signal, send it. */ 2083f855a371SJohan Rudholm mmc_set_clock(host, host->f_init); 2084f855a371SJohan Rudholm host->ops->hw_reset(host); 2085f855a371SJohan Rudholm /* Set initial state and call mmc_set_ios */ 2086f855a371SJohan Rudholm mmc_set_initial_state(host); 20874e6c7178SGwendal Grignou } else { 20884e6c7178SGwendal Grignou /* Do a brute force power cycle */ 20894e6c7178SGwendal Grignou mmc_power_cycle(host, card->ocr); 20904e6c7178SGwendal Grignou } 2091364549ddSUlf Hansson return mmc_init_card(host, card->ocr, card); 2092f855a371SJohan Rudholm } 2093f855a371SJohan Rudholm 20949feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 20959feae246SAdrian Hunter .remove = mmc_remove, 20969feae246SAdrian Hunter .detect = mmc_detect, 20979feae246SAdrian Hunter .suspend = mmc_suspend, 20989feae246SAdrian Hunter .resume = mmc_resume, 2099c4d770d7SUlf Hansson .runtime_suspend = mmc_runtime_suspend, 2100c4d770d7SUlf Hansson .runtime_resume = mmc_runtime_resume, 2101d3049504SAdrian Hunter .alive = mmc_alive, 2102486fdbbcSUlf Hansson .shutdown = mmc_shutdown, 2103f855a371SJohan Rudholm .reset = mmc_reset, 21049feae246SAdrian Hunter }; 21059feae246SAdrian Hunter 21066abaa0c9SPierre Ossman /* 21076abaa0c9SPierre Ossman * Starting point for MMC card init. 21086abaa0c9SPierre Ossman */ 2109807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 21106abaa0c9SPierre Ossman { 21116abaa0c9SPierre Ossman int err; 211269041150SUlf Hansson u32 ocr, rocr; 21136abaa0c9SPierre Ossman 21146abaa0c9SPierre Ossman BUG_ON(!host); 2115d84075c8SPierre Ossman WARN_ON(!host->claimed); 21166abaa0c9SPierre Ossman 211744669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 211844669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 211944669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 212044669034SStefan Nilsson XK 2121807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 2122807e8e40SAndy Ross if (err) 2123807e8e40SAndy Ross return err; 2124807e8e40SAndy Ross 21252501c917SUlf Hansson mmc_attach_bus(host, &mmc_ops); 21268f230f45STakashi Iwai if (host->ocr_avail_mmc) 21278f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 21286abaa0c9SPierre Ossman 21296abaa0c9SPierre Ossman /* 2130af517150SDavid Brownell * We need to get OCR a different way for SPI. 2131af517150SDavid Brownell */ 2132af517150SDavid Brownell if (mmc_host_is_spi(host)) { 2133af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 2134af517150SDavid Brownell if (err) 2135af517150SDavid Brownell goto err; 2136af517150SDavid Brownell } 2137af517150SDavid Brownell 213869041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 21396abaa0c9SPierre Ossman 21406abaa0c9SPierre Ossman /* 21416abaa0c9SPierre Ossman * Can we support the voltage of the card? 21426abaa0c9SPierre Ossman */ 214369041150SUlf Hansson if (!rocr) { 2144109b5bedSPierre Ossman err = -EINVAL; 21456abaa0c9SPierre Ossman goto err; 2146109b5bedSPierre Ossman } 21476abaa0c9SPierre Ossman 21486abaa0c9SPierre Ossman /* 21496abaa0c9SPierre Ossman * Detect and init the card. 21506abaa0c9SPierre Ossman */ 215169041150SUlf Hansson err = mmc_init_card(host, rocr, NULL); 215217b0429dSPierre Ossman if (err) 21536abaa0c9SPierre Ossman goto err; 21546abaa0c9SPierre Ossman 21556abaa0c9SPierre Ossman mmc_release_host(host); 21564101c16aSPierre Ossman err = mmc_add_card(host->card); 21577ea239d9SPierre Ossman if (err) 21582986d0bfSPierre Ossman goto remove_card; 21597ea239d9SPierre Ossman 21602860d060SSergei Shtylyov mmc_claim_host(host); 21617ea239d9SPierre Ossman return 0; 21627ea239d9SPierre Ossman 21632986d0bfSPierre Ossman remove_card: 21646abaa0c9SPierre Ossman mmc_remove_card(host->card); 21652986d0bfSPierre Ossman mmc_claim_host(host); 2166807e8e40SAndy Ross host->card = NULL; 21677ea239d9SPierre Ossman err: 21687ea239d9SPierre Ossman mmc_detach_bus(host); 21697ea239d9SPierre Ossman 2170a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising MMC card\n", 2171109b5bedSPierre Ossman mmc_hostname(host), err); 2172109b5bedSPierre Ossman 2173adf66a0dSPierre Ossman return err; 21747ea239d9SPierre Ossman } 2175