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 29fe1b5700SUlf Hansson #define DEFAULT_CMD6_TIMEOUT_MS 500 30fe1b5700SUlf Hansson 317ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 327ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 337ea239d9SPierre Ossman 0, 0, 0, 0 347ea239d9SPierre Ossman }; 357ea239d9SPierre Ossman 367ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 377ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 387ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 397ea239d9SPierre Ossman }; 407ea239d9SPierre Ossman 417ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 427ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 437ea239d9SPierre Ossman }; 447ea239d9SPierre Ossman 457ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 467ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 477ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 487ea239d9SPierre Ossman }; 497ea239d9SPierre Ossman 505320226aSPratibhasagar V static const struct mmc_fixup mmc_ext_csd_fixups[] = { 515320226aSPratibhasagar V /* 525320226aSPratibhasagar V * Certain Hynix eMMC 4.41 cards might get broken when HPI feature 535320226aSPratibhasagar V * is used so disable the HPI feature for such buggy cards. 545320226aSPratibhasagar V */ 555320226aSPratibhasagar V MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX, 565320226aSPratibhasagar V 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5), 575320226aSPratibhasagar V 585320226aSPratibhasagar V END_FIXUP 595320226aSPratibhasagar V }; 605320226aSPratibhasagar V 617ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 627ea239d9SPierre Ossman ({ \ 637ea239d9SPierre Ossman const int __size = size; \ 647ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 657ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 667ea239d9SPierre Ossman const int __shft = (start) & 31; \ 677ea239d9SPierre Ossman u32 __res; \ 687ea239d9SPierre Ossman \ 697ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 707ea239d9SPierre Ossman if (__size + __shft > 32) \ 717ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 727ea239d9SPierre Ossman __res & __mask; \ 737ea239d9SPierre Ossman }) 747ea239d9SPierre Ossman 757ea239d9SPierre Ossman /* 767ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 777ea239d9SPierre Ossman */ 78bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 797ea239d9SPierre Ossman { 807ea239d9SPierre Ossman u32 *resp = card->raw_cid; 817ea239d9SPierre Ossman 827ea239d9SPierre Ossman /* 837ea239d9SPierre Ossman * The selection of the format here is based upon published 847ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 857ea239d9SPierre Ossman */ 867ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 877ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 887ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 897ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 907ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 917ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 927ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 937ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 947ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 957ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 967ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 977ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 987ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 997ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 1007ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 1017ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1027ea239d9SPierre Ossman break; 1037ea239d9SPierre Ossman 1047ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 1057ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 1067ea239d9SPierre Ossman case 4: /* MMC v4 */ 1077ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 1087ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 1097ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 1107ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 1117ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 1127ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 1137ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 1147ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 11551e7e8b6SBernie Thompson card->cid.prv = UNSTUFF_BITS(resp, 48, 8); 1167ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 1177ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 1187ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1197ea239d9SPierre Ossman break; 1207ea239d9SPierre Ossman 1217ea239d9SPierre Ossman default: 122a3c76eb9SGirish K S pr_err("%s: card has unknown MMCA version %d\n", 1237ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 124bd766312SPierre Ossman return -EINVAL; 1257ea239d9SPierre Ossman } 126bd766312SPierre Ossman 127bd766312SPierre Ossman return 0; 1287ea239d9SPierre Ossman } 1297ea239d9SPierre Ossman 130dfe86cbaSAdrian Hunter static void mmc_set_erase_size(struct mmc_card *card) 131dfe86cbaSAdrian Hunter { 132dfe86cbaSAdrian Hunter if (card->ext_csd.erase_group_def & 1) 133dfe86cbaSAdrian Hunter card->erase_size = card->ext_csd.hc_erase_size; 134dfe86cbaSAdrian Hunter else 135dfe86cbaSAdrian Hunter card->erase_size = card->csd.erase_size; 136dfe86cbaSAdrian Hunter 137dfe86cbaSAdrian Hunter mmc_init_erase(card); 138dfe86cbaSAdrian Hunter } 139dfe86cbaSAdrian Hunter 1407ea239d9SPierre Ossman /* 1417ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1427ea239d9SPierre Ossman */ 143bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1447ea239d9SPierre Ossman { 1457ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 146dfe86cbaSAdrian Hunter unsigned int e, m, a, b; 1477ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1487ea239d9SPierre Ossman 1497ea239d9SPierre Ossman /* 1507ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1517ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1526da24b78SKyungmin Park * We also support eMMC v4.4 & v4.41. 1537ea239d9SPierre Ossman */ 1546da24b78SKyungmin Park csd->structure = UNSTUFF_BITS(resp, 126, 2); 1556da24b78SKyungmin Park if (csd->structure == 0) { 156a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1576da24b78SKyungmin Park mmc_hostname(card->host), csd->structure); 158bd766312SPierre Ossman return -EINVAL; 1597ea239d9SPierre Ossman } 1607ea239d9SPierre Ossman 1617ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1627ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1637ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1647ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1657ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1667ea239d9SPierre Ossman 1677ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1687ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1697ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1707ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1717ea239d9SPierre Ossman 1727ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1737ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1747ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1757ea239d9SPierre Ossman 1767ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1777ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1787ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1797ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1803d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1817ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1827ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1837ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 184bd766312SPierre Ossman 185dfe86cbaSAdrian Hunter if (csd->write_blkbits >= 9) { 186dfe86cbaSAdrian Hunter a = UNSTUFF_BITS(resp, 42, 5); 187dfe86cbaSAdrian Hunter b = UNSTUFF_BITS(resp, 37, 5); 188dfe86cbaSAdrian Hunter csd->erase_size = (a + 1) * (b + 1); 189dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 190dfe86cbaSAdrian Hunter } 191dfe86cbaSAdrian Hunter 192bd766312SPierre Ossman return 0; 1937ea239d9SPierre Ossman } 1947ea239d9SPierre Ossman 19596cf5f02SSeungwon Jeon static void mmc_select_card_type(struct mmc_card *card) 19696cf5f02SSeungwon Jeon { 19796cf5f02SSeungwon Jeon struct mmc_host *host = card->host; 1980a5b6438SSeungwon Jeon u8 card_type = card->ext_csd.raw_card_type; 1995f1a4dd0SLee Jones u32 caps = host->caps, caps2 = host->caps2; 200577fb131SSeungwon Jeon unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; 2012415c0efSSeungwon Jeon unsigned int avail_type = 0; 20296cf5f02SSeungwon Jeon 20396cf5f02SSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 2042415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_26) { 2052415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_26_MAX_DTR; 2062415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_26; 2072415c0efSSeungwon Jeon } 2082415c0efSSeungwon Jeon 2092415c0efSSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 2102415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_52) { 21196cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_52_MAX_DTR; 2122415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_52; 2132415c0efSSeungwon Jeon } 21496cf5f02SSeungwon Jeon 2152415c0efSSeungwon Jeon if (caps & MMC_CAP_1_8V_DDR && 2162415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { 21796cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2182415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; 2192415c0efSSeungwon Jeon } 22096cf5f02SSeungwon Jeon 2212415c0efSSeungwon Jeon if (caps & MMC_CAP_1_2V_DDR && 2222415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 2232415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2242415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; 2252415c0efSSeungwon Jeon } 2262415c0efSSeungwon Jeon 2272415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_8V_SDR && 2282415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { 229577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2302415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; 2312415c0efSSeungwon Jeon } 2322415c0efSSeungwon Jeon 2332415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_2V_SDR && 2342415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { 235577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2362415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; 2372415c0efSSeungwon Jeon } 23896cf5f02SSeungwon Jeon 2390a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_8V && 2400a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { 2410a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2420a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; 2430a5b6438SSeungwon Jeon } 2440a5b6438SSeungwon Jeon 2450a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_2V && 2460a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { 2470a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2480a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; 2490a5b6438SSeungwon Jeon } 2500a5b6438SSeungwon Jeon 25181ac2af6SShawn Lin if ((caps2 & MMC_CAP2_HS400_ES) && 25281ac2af6SShawn Lin card->ext_csd.strobe_support && 25381ac2af6SShawn Lin (avail_type & EXT_CSD_CARD_TYPE_HS400)) 25481ac2af6SShawn Lin avail_type |= EXT_CSD_CARD_TYPE_HS400ES; 25581ac2af6SShawn Lin 25696cf5f02SSeungwon Jeon card->ext_csd.hs_max_dtr = hs_max_dtr; 257577fb131SSeungwon Jeon card->ext_csd.hs200_max_dtr = hs200_max_dtr; 2582415c0efSSeungwon Jeon card->mmc_avail_type = avail_type; 25996cf5f02SSeungwon Jeon } 26096cf5f02SSeungwon Jeon 261b4493eeaSGrégory Soutadé static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) 262b4493eeaSGrégory Soutadé { 263994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 264994324bbSGrégory Soutadé 265994324bbSGrégory Soutadé /* 266994324bbSGrégory Soutadé * Disable these attributes by default 267994324bbSGrégory Soutadé */ 268994324bbSGrégory Soutadé card->ext_csd.enhanced_area_offset = -EINVAL; 269994324bbSGrégory Soutadé card->ext_csd.enhanced_area_size = -EINVAL; 270b4493eeaSGrégory Soutadé 271b4493eeaSGrégory Soutadé /* 272b4493eeaSGrégory Soutadé * Enhanced area feature support -- check whether the eMMC 273b4493eeaSGrégory Soutadé * card has the Enhanced area enabled. If so, export enhanced 274b4493eeaSGrégory Soutadé * area offset and size to user by adding sysfs interface. 275b4493eeaSGrégory Soutadé */ 276b4493eeaSGrégory Soutadé if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 277b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 278994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed) { 279b4493eeaSGrégory Soutadé hc_erase_grp_sz = 280b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 281b4493eeaSGrégory Soutadé hc_wp_grp_sz = 282b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 283b4493eeaSGrégory Soutadé 284b4493eeaSGrégory Soutadé /* 285b4493eeaSGrégory Soutadé * calculate the enhanced data area offset, in bytes 286b4493eeaSGrégory Soutadé */ 287b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset = 288ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[139]) << 24) + 289ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[138]) << 16) + 290ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[137]) << 8) + 291ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[136])); 292b4493eeaSGrégory Soutadé if (mmc_card_blockaddr(card)) 293b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset <<= 9; 294b4493eeaSGrégory Soutadé /* 295b4493eeaSGrégory Soutadé * calculate the enhanced data area size, in kilobytes 296b4493eeaSGrégory Soutadé */ 297b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size = 298b4493eeaSGrégory Soutadé (ext_csd[142] << 16) + (ext_csd[141] << 8) + 299b4493eeaSGrégory Soutadé ext_csd[140]; 300b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size *= 301b4493eeaSGrégory Soutadé (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 302b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size <<= 9; 303b4493eeaSGrégory Soutadé } else { 304994324bbSGrégory Soutadé pr_warn("%s: defines enhanced area without partition setting complete\n", 305994324bbSGrégory Soutadé mmc_hostname(card->host)); 306994324bbSGrégory Soutadé } 307b4493eeaSGrégory Soutadé } 308b4493eeaSGrégory Soutadé } 309b4493eeaSGrégory Soutadé 310b4493eeaSGrégory Soutadé static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) 311b4493eeaSGrégory Soutadé { 312b4493eeaSGrégory Soutadé int idx; 313994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 314994324bbSGrégory Soutadé unsigned int part_size; 315b4493eeaSGrégory Soutadé 316b4493eeaSGrégory Soutadé /* 317b4493eeaSGrégory Soutadé * General purpose partition feature support -- 318b4493eeaSGrégory Soutadé * If ext_csd has the size of general purpose partitions, 319b4493eeaSGrégory Soutadé * set size, part_cfg, partition name in mmc_part. 320b4493eeaSGrégory Soutadé */ 321b4493eeaSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 322b4493eeaSGrégory Soutadé EXT_CSD_PART_SUPPORT_PART_EN) { 323b4493eeaSGrégory Soutadé hc_erase_grp_sz = 324b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 325b4493eeaSGrégory Soutadé hc_wp_grp_sz = 326b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 327b4493eeaSGrégory Soutadé 328b4493eeaSGrégory Soutadé for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { 329b4493eeaSGrégory Soutadé if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && 330b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && 331b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) 332b4493eeaSGrégory Soutadé continue; 333994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed == 0) { 334994324bbSGrégory Soutadé pr_warn("%s: has partition size defined without partition complete\n", 335994324bbSGrégory Soutadé mmc_hostname(card->host)); 336994324bbSGrégory Soutadé break; 337994324bbSGrégory Soutadé } 338b4493eeaSGrégory Soutadé part_size = 339b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] 340b4493eeaSGrégory Soutadé << 16) + 341b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] 342b4493eeaSGrégory Soutadé << 8) + 343b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; 344b4493eeaSGrégory Soutadé part_size *= (size_t)(hc_erase_grp_sz * 345b4493eeaSGrégory Soutadé hc_wp_grp_sz); 346b4493eeaSGrégory Soutadé mmc_part_add(card, part_size << 19, 347b4493eeaSGrégory Soutadé EXT_CSD_PART_CONFIG_ACC_GP0 + idx, 348b4493eeaSGrégory Soutadé "gp%d", idx, false, 349b4493eeaSGrégory Soutadé MMC_BLK_DATA_AREA_GP); 350b4493eeaSGrégory Soutadé } 351b4493eeaSGrégory Soutadé } 352b4493eeaSGrégory Soutadé } 353b4493eeaSGrégory Soutadé 3541c447116SAdrian Hunter /* Minimum partition switch timeout in milliseconds */ 3551c447116SAdrian Hunter #define MMC_MIN_PART_SWITCH_TIME 300 3561c447116SAdrian Hunter 35708ee80ccSPhilip Rakity /* 35808ee80ccSPhilip Rakity * Decode extended CSD. 35908ee80ccSPhilip Rakity */ 360076ec38aSUlf Hansson static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) 36108ee80ccSPhilip Rakity { 362e0c368d5SNamjae Jeon int err = 0, idx; 363e0c368d5SNamjae Jeon unsigned int part_size; 36481f8a7beSHans de Goede struct device_node *np; 36581f8a7beSHans de Goede bool broken_hpi = false; 36608ee80ccSPhilip Rakity 3676da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 368f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 3696da24b78SKyungmin Park if (card->csd.structure == 3) { 370f39b2dd9SPhilip Rakity if (card->ext_csd.raw_ext_csd_structure > 2) { 371a3c76eb9SGirish K S pr_err("%s: unrecognised EXT_CSD structure " 3728fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 373f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure); 3746da24b78SKyungmin Park err = -EINVAL; 3756da24b78SKyungmin Park goto out; 3766da24b78SKyungmin Park } 3776da24b78SKyungmin Park } 3786da24b78SKyungmin Park 37981f8a7beSHans de Goede np = mmc_of_find_child_device(card->host, 0); 38081f8a7beSHans de Goede if (np && of_device_is_compatible(np, "mmc-card")) 38181f8a7beSHans de Goede broken_hpi = of_property_read_bool(np, "broken-hpi"); 38281f8a7beSHans de Goede of_node_put(np); 38381f8a7beSHans de Goede 38403a59437SRomain Izard /* 38503a59437SRomain Izard * The EXT_CSD format is meant to be forward compatible. As long 38603a59437SRomain Izard * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV 38703a59437SRomain Izard * are authorized, see JEDEC JESD84-B50 section B.8. 38803a59437SRomain Izard */ 3896da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 390d7604d76SPierre Ossman 3915320226aSPratibhasagar V /* fixup device after ext_csd revision field is updated */ 3925320226aSPratibhasagar V mmc_fixup_device(card, mmc_ext_csd_fixups); 3935320226aSPratibhasagar V 394f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 395f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 396f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 397f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 398b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 3997ea239d9SPierre Ossman card->ext_csd.sectors = 4007ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 4017ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 4027ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 4037ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 404fc8a0985SHanumath Prasad 405fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 406fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 4077ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 408d7604d76SPierre Ossman } 40996cf5f02SSeungwon Jeon 41081ac2af6SShawn Lin card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; 411f39b2dd9SPhilip Rakity card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 41296cf5f02SSeungwon Jeon mmc_select_card_type(card); 4137ea239d9SPierre Ossman 414f39b2dd9SPhilip Rakity card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 415f39b2dd9SPhilip Rakity card->ext_csd.raw_erase_timeout_mult = 416f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 417f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_grp_size = 418f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 419b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 420b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 421371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 422371a689fSAndrei Warkentin 423371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 424371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 4251c447116SAdrian Hunter /* Some eMMC set the value too low so set a minimum */ 4261c447116SAdrian Hunter if (card->ext_csd.part_time && 4271c447116SAdrian Hunter card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) 4281c447116SAdrian Hunter card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; 429b1ebe384SJarkko Lavinen 430b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 431b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 432b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 433b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 434dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 435dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 436dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 437dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 438dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 439dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 440f4c5522bSAndrei Warkentin 441f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 442371a689fSAndrei Warkentin 443371a689fSAndrei Warkentin /* 444371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 445371a689fSAndrei Warkentin * multiples of 128K. 446371a689fSAndrei Warkentin */ 447e0c368d5SNamjae Jeon if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 448e0c368d5SNamjae Jeon for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 449e0c368d5SNamjae Jeon part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 450e0c368d5SNamjae Jeon mmc_part_add(card, part_size, 451e0c368d5SNamjae Jeon EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 452add710eaSJohan Rudholm "boot%d", idx, true, 453add710eaSJohan Rudholm MMC_BLK_DATA_AREA_BOOT); 454e0c368d5SNamjae Jeon } 455e0c368d5SNamjae Jeon } 456b1ebe384SJarkko Lavinen } 457b1ebe384SJarkko Lavinen 458f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_gap_size = 459dd13b4edSJurgen Heeks ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 460f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_trim_mult = 461f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_TRIM_MULT]; 462f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_erase_mult = 463f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_ERASE_MULT]; 464f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_feature_support = 465f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 466f39b2dd9SPhilip Rakity card->ext_csd.raw_trim_mult = 467f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_TRIM_MULT]; 468836dc2feSPhilip Rakity card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 469b097e07fSAdrian Hunter card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; 470dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 47169803d4fSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & 47269803d4fSGrégory Soutadé EXT_CSD_PART_SETTING_COMPLETED) 47369803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 1; 47469803d4fSGrégory Soutadé else 47569803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 0; 47669803d4fSGrégory Soutadé 477b4493eeaSGrégory Soutadé mmc_manage_enhanced_area(card, ext_csd); 478709de99dSChuanxiao Dong 479b4493eeaSGrégory Soutadé mmc_manage_gp_partitions(card, ext_csd); 480e0c368d5SNamjae Jeon 481dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 482dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 483dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 484dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 485dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 486dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 487dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 488dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 489add710eaSJohan Rudholm 490add710eaSJohan Rudholm /* 491add710eaSJohan Rudholm * Note that the call to mmc_part_add above defaults to read 492add710eaSJohan Rudholm * only. If this default assumption is changed, the call must 493add710eaSJohan Rudholm * take into account the value of boot_locked below. 494add710eaSJohan Rudholm */ 495add710eaSJohan Rudholm card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; 496add710eaSJohan Rudholm card->ext_csd.boot_ro_lockable = true; 49760443712SFredrik Soderstedt 49860443712SFredrik Soderstedt /* Save power class values */ 49960443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_195 = 50060443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_195]; 50160443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_195 = 50260443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_195]; 50360443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_360 = 50460443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_360]; 50560443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_360 = 50660443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_360]; 50760443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_195 = 50860443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_195]; 50960443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_360 = 51060443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_360]; 51160443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_195 = 51260443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; 51360443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_360 = 51460443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; 5150a5b6438SSeungwon Jeon card->ext_csd.raw_pwr_cl_ddr_200_360 = 5160a5b6438SSeungwon Jeon ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; 517dfe86cbaSAdrian Hunter } 518dfe86cbaSAdrian Hunter 519b2499518SAdrian Hunter if (card->ext_csd.rev >= 5) { 5207c4f10acSRomain Izard /* Adjust production date as per JEDEC JESD84-B451 */ 5217c4f10acSRomain Izard if (card->cid.year < 2010) 5227c4f10acSRomain Izard card->cid.year += 16; 5237c4f10acSRomain Izard 524950d56acSJaehoon Chung /* check whether the eMMC card supports BKOPS */ 5255320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 5265320226aSPratibhasagar V ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { 527950d56acSJaehoon Chung card->ext_csd.bkops = 1; 5280501be64SAlexey Skidanov card->ext_csd.man_bkops_en = 5290501be64SAlexey Skidanov (ext_csd[EXT_CSD_BKOPS_EN] & 5300501be64SAlexey Skidanov EXT_CSD_MANUAL_BKOPS_MASK); 531950d56acSJaehoon Chung card->ext_csd.raw_bkops_status = 532950d56acSJaehoon Chung ext_csd[EXT_CSD_BKOPS_STATUS]; 5330501be64SAlexey Skidanov if (!card->ext_csd.man_bkops_en) 5344ec96b4cSWolfram Sang pr_debug("%s: MAN_BKOPS_EN bit is not set\n", 535950d56acSJaehoon Chung mmc_hostname(card->host)); 536950d56acSJaehoon Chung } 537950d56acSJaehoon Chung 538eb0d8f13SJaehoon Chung /* check whether the eMMC card supports HPI */ 5395320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 5405320226aSPratibhasagar V !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { 541eb0d8f13SJaehoon Chung card->ext_csd.hpi = 1; 542eb0d8f13SJaehoon Chung if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 543eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 544eb0d8f13SJaehoon Chung else 545eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 546eb0d8f13SJaehoon Chung /* 547eb0d8f13SJaehoon Chung * Indicate the maximum timeout to close 548eb0d8f13SJaehoon Chung * a command interrupted by HPI 549eb0d8f13SJaehoon Chung */ 550eb0d8f13SJaehoon Chung card->ext_csd.out_of_int_time = 551eb0d8f13SJaehoon Chung ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 552eb0d8f13SJaehoon Chung } 553eb0d8f13SJaehoon Chung 554f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 555b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 556090d25feSLoic Pallardy 557090d25feSLoic Pallardy /* 558090d25feSLoic Pallardy * RPMB regions are defined in multiples of 128K. 559090d25feSLoic Pallardy */ 560090d25feSLoic Pallardy card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; 561d0123ccaSBalaji T K if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { 562090d25feSLoic Pallardy mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, 563090d25feSLoic Pallardy EXT_CSD_PART_CONFIG_ACC_RPMB, 564090d25feSLoic Pallardy "rpmb", 0, false, 565090d25feSLoic Pallardy MMC_BLK_DATA_AREA_RPMB); 566090d25feSLoic Pallardy } 567b2499518SAdrian Hunter } 568f4c5522bSAndrei Warkentin 5695238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 570dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 571dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 572dfe86cbaSAdrian Hunter else 573dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 574dfe86cbaSAdrian Hunter 575336c716aSSeungwon Jeon /* eMMC v4.5 or later */ 576fe1b5700SUlf Hansson card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS; 577bec8726aSGirish K S if (card->ext_csd.rev >= 6) { 578336c716aSSeungwon Jeon card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 579336c716aSSeungwon Jeon 580b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 10 * 581b23cf0bdSSeungwon Jeon ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 582bec8726aSGirish K S card->ext_csd.power_off_longtime = 10 * 583bec8726aSGirish K S ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 584b23cf0bdSSeungwon Jeon 585881d1c25SSeungwon Jeon card->ext_csd.cache_size = 586881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 587881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 588881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 589881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 5904265900eSSaugata Das 5914265900eSSaugata Das if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) 5924265900eSSaugata Das card->ext_csd.data_sector_size = 4096; 5934265900eSSaugata Das else 5944265900eSSaugata Das card->ext_csd.data_sector_size = 512; 5954265900eSSaugata Das 5964265900eSSaugata Das if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && 5974265900eSSaugata Das (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { 5984265900eSSaugata Das card->ext_csd.data_tag_unit_size = 5994265900eSSaugata Das ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * 6004265900eSSaugata Das (card->ext_csd.data_sector_size); 6014265900eSSaugata Das } else { 6024265900eSSaugata Das card->ext_csd.data_tag_unit_size = 0; 6034265900eSSaugata Das } 604abd9ac14SSeungwon Jeon 605abd9ac14SSeungwon Jeon card->ext_csd.max_packed_writes = 606abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_WRITES]; 607abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads = 608abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_READS]; 609a5075eb9SSaugata Das } else { 610a5075eb9SSaugata Das card->ext_csd.data_sector_size = 512; 611336c716aSSeungwon Jeon } 612881d1c25SSeungwon Jeon 6130f762426SGwendal Grignou /* eMMC v5 or later */ 6140f762426SGwendal Grignou if (card->ext_csd.rev >= 7) { 6150f762426SGwendal Grignou memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], 6160f762426SGwendal Grignou MMC_FIRMWARE_LEN); 6170f762426SGwendal Grignou card->ext_csd.ffu_capable = 6180f762426SGwendal Grignou (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && 6190f762426SGwendal Grignou !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); 6200f762426SGwendal Grignou } 6217ea239d9SPierre Ossman out: 62208ee80ccSPhilip Rakity return err; 62308ee80ccSPhilip Rakity } 6247ea239d9SPierre Ossman 625076ec38aSUlf Hansson static int mmc_read_ext_csd(struct mmc_card *card) 626076ec38aSUlf Hansson { 627c197787cSUlf Hansson u8 *ext_csd; 628076ec38aSUlf Hansson int err; 629076ec38aSUlf Hansson 630c197787cSUlf Hansson if (!mmc_can_ext_csd(card)) 631c197787cSUlf Hansson return 0; 632c197787cSUlf Hansson 633076ec38aSUlf Hansson err = mmc_get_ext_csd(card, &ext_csd); 634c197787cSUlf Hansson if (err) { 635c197787cSUlf Hansson /* If the host or the card can't do the switch, 636c197787cSUlf Hansson * fail more gracefully. */ 637c197787cSUlf Hansson if ((err != -EINVAL) 638c197787cSUlf Hansson && (err != -ENOSYS) 639c197787cSUlf Hansson && (err != -EFAULT)) 640076ec38aSUlf Hansson return err; 641076ec38aSUlf Hansson 642c197787cSUlf Hansson /* 643c197787cSUlf Hansson * High capacity cards should have this "magic" size 644c197787cSUlf Hansson * stored in their CSD. 645c197787cSUlf Hansson */ 646c197787cSUlf Hansson if (card->csd.capacity == (4096 * 512)) { 647c197787cSUlf Hansson pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", 648c197787cSUlf Hansson mmc_hostname(card->host)); 649c197787cSUlf Hansson } else { 650c197787cSUlf Hansson pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", 651c197787cSUlf Hansson mmc_hostname(card->host)); 652c197787cSUlf Hansson err = 0; 653c197787cSUlf Hansson } 654c197787cSUlf Hansson 655c197787cSUlf Hansson return err; 656c197787cSUlf Hansson } 657c197787cSUlf Hansson 658076ec38aSUlf Hansson err = mmc_decode_ext_csd(card, ext_csd); 659076ec38aSUlf Hansson kfree(ext_csd); 660076ec38aSUlf Hansson return err; 661076ec38aSUlf Hansson } 662076ec38aSUlf Hansson 663f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 66408ee80ccSPhilip Rakity { 66508ee80ccSPhilip Rakity u8 *bw_ext_csd; 66608ee80ccSPhilip Rakity int err; 66708ee80ccSPhilip Rakity 668f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 669f39b2dd9SPhilip Rakity return 0; 67008ee80ccSPhilip Rakity 671f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 672c197787cSUlf Hansson if (err) 673c197787cSUlf Hansson return err; 67408ee80ccSPhilip Rakity 67508ee80ccSPhilip Rakity /* only compare read only fields */ 676dd13b4edSJurgen Heeks err = !((card->ext_csd.raw_partition_support == 67708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 678f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 67908ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 680f39b2dd9SPhilip Rakity (card->ext_csd.rev == 68108ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 682f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 68308ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 684f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 68508ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 686f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 68708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 688f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 68908ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 690f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 69108ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 692f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 69308ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 694f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 69508ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 696f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 69708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 698f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 69908ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 700f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 70108ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 702f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 703f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 704f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 705f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 706f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 707f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 708f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 70960443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && 71060443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_195 == 71160443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && 71260443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_195 == 71360443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && 71460443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_360 == 71560443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && 71660443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_360 == 71760443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && 71860443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_195 == 71960443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && 72060443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_360 == 72160443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && 72260443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_195 == 72360443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && 72460443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_360 == 7250a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && 7260a5b6438SSeungwon Jeon (card->ext_csd.raw_pwr_cl_ddr_200_360 == 7270a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); 7280a5b6438SSeungwon Jeon 72908ee80ccSPhilip Rakity if (err) 73008ee80ccSPhilip Rakity err = -EINVAL; 73108ee80ccSPhilip Rakity 73200b41b58SUlf Hansson kfree(bw_ext_csd); 7337ea239d9SPierre Ossman return err; 7347ea239d9SPierre Ossman } 7357ea239d9SPierre Ossman 73651ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 73751ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 73851ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 73951ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 74051ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 741dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 742dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 7430f762426SGwendal Grignou MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); 74451ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 74551ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 74651ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 74751ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 74851e7e8b6SBernie Thompson MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); 74951ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 750709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 751709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 752709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 753188cc042SLoic Pallardy MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); 754188cc042SLoic Pallardy MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); 7555fb06af7SBojan Prtvar MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); 75651ec92e2SPierre Ossman 7570f762426SGwendal Grignou static ssize_t mmc_fwrev_show(struct device *dev, 7580f762426SGwendal Grignou struct device_attribute *attr, 7590f762426SGwendal Grignou char *buf) 7600f762426SGwendal Grignou { 7610f762426SGwendal Grignou struct mmc_card *card = mmc_dev_to_card(dev); 7620f762426SGwendal Grignou 7630f762426SGwendal Grignou if (card->ext_csd.rev < 7) { 7640f762426SGwendal Grignou return sprintf(buf, "0x%x\n", card->cid.fwrev); 7650f762426SGwendal Grignou } else { 7660f762426SGwendal Grignou return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, 7670f762426SGwendal Grignou card->ext_csd.fwrev); 7680f762426SGwendal Grignou } 7690f762426SGwendal Grignou } 7700f762426SGwendal Grignou 7710f762426SGwendal Grignou static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); 7720f762426SGwendal Grignou 7736825a606SBojan Prtvar static ssize_t mmc_dsr_show(struct device *dev, 7746825a606SBojan Prtvar struct device_attribute *attr, 7756825a606SBojan Prtvar char *buf) 7766825a606SBojan Prtvar { 7776825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev); 7786825a606SBojan Prtvar struct mmc_host *host = card->host; 7796825a606SBojan Prtvar 7806825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req) 7816825a606SBojan Prtvar return sprintf(buf, "0x%x\n", host->dsr); 7826825a606SBojan Prtvar else 7836825a606SBojan Prtvar /* return default DSR value */ 7846825a606SBojan Prtvar return sprintf(buf, "0x%x\n", 0x404); 7856825a606SBojan Prtvar } 7866825a606SBojan Prtvar 7876825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 7886825a606SBojan Prtvar 78951ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 79051ec92e2SPierre Ossman &dev_attr_cid.attr, 79151ec92e2SPierre Ossman &dev_attr_csd.attr, 79251ec92e2SPierre Ossman &dev_attr_date.attr, 793dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 794dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 79551ec92e2SPierre Ossman &dev_attr_fwrev.attr, 7960f762426SGwendal Grignou &dev_attr_ffu_capable.attr, 79751ec92e2SPierre Ossman &dev_attr_hwrev.attr, 79851ec92e2SPierre Ossman &dev_attr_manfid.attr, 79951ec92e2SPierre Ossman &dev_attr_name.attr, 80051ec92e2SPierre Ossman &dev_attr_oemid.attr, 80151e7e8b6SBernie Thompson &dev_attr_prv.attr, 80251ec92e2SPierre Ossman &dev_attr_serial.attr, 803709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 804709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 805188cc042SLoic Pallardy &dev_attr_raw_rpmb_size_mult.attr, 806188cc042SLoic Pallardy &dev_attr_rel_sectors.attr, 8075fb06af7SBojan Prtvar &dev_attr_ocr.attr, 8086825a606SBojan Prtvar &dev_attr_dsr.attr, 80951ec92e2SPierre Ossman NULL, 81051ec92e2SPierre Ossman }; 811d1e58212SAxel Lin ATTRIBUTE_GROUPS(mmc_std); 81251ec92e2SPierre Ossman 81351ec92e2SPierre Ossman static struct device_type mmc_type = { 814d1e58212SAxel Lin .groups = mmc_std_groups, 81551ec92e2SPierre Ossman }; 81651ec92e2SPierre Ossman 8177ea239d9SPierre Ossman /* 818b87d8dbfSGirish K S * Select the PowerClass for the current bus width 819b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 820b87d8dbfSGirish K S * extended CSD register, select it by executing the 821b87d8dbfSGirish K S * mmc_switch command. 822b87d8dbfSGirish K S */ 8232385049dSSeungwon Jeon static int __mmc_select_powerclass(struct mmc_card *card, 82460443712SFredrik Soderstedt unsigned int bus_width) 825b87d8dbfSGirish K S { 8262385049dSSeungwon Jeon struct mmc_host *host = card->host; 8272385049dSSeungwon Jeon struct mmc_ext_csd *ext_csd = &card->ext_csd; 82860443712SFredrik Soderstedt unsigned int pwrclass_val = 0; 8292385049dSSeungwon Jeon int err = 0; 830b87d8dbfSGirish K S 831b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 832b87d8dbfSGirish K S case MMC_VDD_165_195: 8332385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 8342385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_195; 8352385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 83660443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 8372385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_195 : 8382385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_195; 8392385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8402385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_200_195; 841b87d8dbfSGirish K S break; 84293fc5a47SSubhash Jadavani case MMC_VDD_27_28: 84393fc5a47SSubhash Jadavani case MMC_VDD_28_29: 84493fc5a47SSubhash Jadavani case MMC_VDD_29_30: 84593fc5a47SSubhash Jadavani case MMC_VDD_30_31: 84693fc5a47SSubhash Jadavani case MMC_VDD_31_32: 847b87d8dbfSGirish K S case MMC_VDD_32_33: 848b87d8dbfSGirish K S case MMC_VDD_33_34: 849b87d8dbfSGirish K S case MMC_VDD_34_35: 850b87d8dbfSGirish K S case MMC_VDD_35_36: 8512385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 8522385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_360; 8532385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 85460443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 8552385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_360 : 8562385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_360; 8572385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8580a5b6438SSeungwon Jeon pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? 8590a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_ddr_200_360 : 8600a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_200_360; 861b87d8dbfSGirish K S break; 862b87d8dbfSGirish K S default: 8636606110dSJoe Perches pr_warn("%s: Voltage range not supported for power class\n", 8646606110dSJoe Perches mmc_hostname(host)); 865b87d8dbfSGirish K S return -EINVAL; 866b87d8dbfSGirish K S } 867b87d8dbfSGirish K S 868b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 869b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 870b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 871b87d8dbfSGirish K S else 872b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 873b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 874b87d8dbfSGirish K S 875b87d8dbfSGirish K S /* If the power class is different from the default value */ 876b87d8dbfSGirish K S if (pwrclass_val > 0) { 877b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 878b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 879b87d8dbfSGirish K S pwrclass_val, 88071fe3eb0SSeungwon Jeon card->ext_csd.generic_cmd6_time); 881b87d8dbfSGirish K S } 882b87d8dbfSGirish K S 883b87d8dbfSGirish K S return err; 884b87d8dbfSGirish K S } 885b87d8dbfSGirish K S 8862385049dSSeungwon Jeon static int mmc_select_powerclass(struct mmc_card *card) 8872385049dSSeungwon Jeon { 8882385049dSSeungwon Jeon struct mmc_host *host = card->host; 8892385049dSSeungwon Jeon u32 bus_width, ext_csd_bits; 8902385049dSSeungwon Jeon int err, ddr; 8912385049dSSeungwon Jeon 8922385049dSSeungwon Jeon /* Power class selection is supported for versions >= 4.0 */ 893148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 8942385049dSSeungwon Jeon return 0; 8952385049dSSeungwon Jeon 8962385049dSSeungwon Jeon bus_width = host->ios.bus_width; 8972385049dSSeungwon Jeon /* Power class values are defined only for 4/8 bit bus */ 8982385049dSSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 8992385049dSSeungwon Jeon return 0; 9002385049dSSeungwon Jeon 9012385049dSSeungwon Jeon ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; 9022385049dSSeungwon Jeon if (ddr) 9032385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 9042385049dSSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 9052385049dSSeungwon Jeon else 9062385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 9072385049dSSeungwon Jeon EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; 9082385049dSSeungwon Jeon 9092385049dSSeungwon Jeon err = __mmc_select_powerclass(card, ext_csd_bits); 9102385049dSSeungwon Jeon if (err) 9112385049dSSeungwon Jeon pr_warn("%s: power class selection to bus width %d ddr %d failed\n", 9122385049dSSeungwon Jeon mmc_hostname(host), 1 << bus_width, ddr); 9132385049dSSeungwon Jeon 9142385049dSSeungwon Jeon return err; 9152385049dSSeungwon Jeon } 9162385049dSSeungwon Jeon 917b87d8dbfSGirish K S /* 918577fb131SSeungwon Jeon * Set the bus speed for the selected speed mode. 919a4924c71SGirish K S */ 920577fb131SSeungwon Jeon static void mmc_set_bus_speed(struct mmc_card *card) 921a4924c71SGirish K S { 922577fb131SSeungwon Jeon unsigned int max_dtr = (unsigned int)-1; 923577fb131SSeungwon Jeon 9240a5b6438SSeungwon Jeon if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 9250a5b6438SSeungwon Jeon max_dtr > card->ext_csd.hs200_max_dtr) 926577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs200_max_dtr; 927577fb131SSeungwon Jeon else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 928577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs_max_dtr; 929577fb131SSeungwon Jeon else if (max_dtr > card->csd.max_dtr) 930577fb131SSeungwon Jeon max_dtr = card->csd.max_dtr; 931577fb131SSeungwon Jeon 932577fb131SSeungwon Jeon mmc_set_clock(card->host, max_dtr); 933577fb131SSeungwon Jeon } 934577fb131SSeungwon Jeon 935577fb131SSeungwon Jeon /* 936577fb131SSeungwon Jeon * Select the bus width amoung 4-bit and 8-bit(SDR). 937577fb131SSeungwon Jeon * If the bus width is changed successfully, return the selected width value. 938577fb131SSeungwon Jeon * Zero is returned instead of error value if the wide width is not supported. 939577fb131SSeungwon Jeon */ 940577fb131SSeungwon Jeon static int mmc_select_bus_width(struct mmc_card *card) 941577fb131SSeungwon Jeon { 942a4924c71SGirish K S static unsigned ext_csd_bits[] = { 943a4924c71SGirish K S EXT_CSD_BUS_WIDTH_8, 944577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH_4, 945a4924c71SGirish K S }; 946a4924c71SGirish K S static unsigned bus_widths[] = { 947a4924c71SGirish K S MMC_BUS_WIDTH_8, 948577fb131SSeungwon Jeon MMC_BUS_WIDTH_4, 949a4924c71SGirish K S }; 950577fb131SSeungwon Jeon struct mmc_host *host = card->host; 951577fb131SSeungwon Jeon unsigned idx, bus_width = 0; 952577fb131SSeungwon Jeon int err = 0; 953a4924c71SGirish K S 9541c2d26e3SAlexandre Belloni if (!mmc_can_ext_csd(card) || 955577fb131SSeungwon Jeon !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) 956577fb131SSeungwon Jeon return 0; 957a4924c71SGirish K S 958577fb131SSeungwon Jeon idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; 959a4924c71SGirish K S 960a4924c71SGirish K S /* 961a4924c71SGirish K S * Unlike SD, MMC cards dont have a configuration register to notify 962a4924c71SGirish K S * supported bus width. So bus test command should be run to identify 963a4924c71SGirish K S * the supported bus width or compare the ext csd values of current 964a4924c71SGirish K S * bus width and ext csd values of 1 bit mode read earlier. 965a4924c71SGirish K S */ 966577fb131SSeungwon Jeon for (; idx < ARRAY_SIZE(bus_widths); idx++) { 967a4924c71SGirish K S /* 968a4924c71SGirish K S * Host is capable of 8bit transfer, then switch 969a4924c71SGirish K S * the device to work in 8bit transfer mode. If the 970a4924c71SGirish K S * mmc switch command returns error then switch to 971a4924c71SGirish K S * 4bit transfer mode. On success set the corresponding 972a4924c71SGirish K S * bus width on the host. 973a4924c71SGirish K S */ 974a4924c71SGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 975a4924c71SGirish K S EXT_CSD_BUS_WIDTH, 976a4924c71SGirish K S ext_csd_bits[idx], 977a4924c71SGirish K S card->ext_csd.generic_cmd6_time); 978a4924c71SGirish K S if (err) 979a4924c71SGirish K S continue; 980a4924c71SGirish K S 981577fb131SSeungwon Jeon bus_width = bus_widths[idx]; 982577fb131SSeungwon Jeon mmc_set_bus_width(host, bus_width); 983a4924c71SGirish K S 984577fb131SSeungwon Jeon /* 985577fb131SSeungwon Jeon * If controller can't handle bus width test, 986577fb131SSeungwon Jeon * compare ext_csd previously read in 1 bit mode 987577fb131SSeungwon Jeon * against ext_csd at new bus width 988577fb131SSeungwon Jeon */ 989a4924c71SGirish K S if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 990577fb131SSeungwon Jeon err = mmc_compare_ext_csds(card, bus_width); 991a4924c71SGirish K S else 992577fb131SSeungwon Jeon err = mmc_bus_test(card, bus_width); 993577fb131SSeungwon Jeon 994577fb131SSeungwon Jeon if (!err) { 995577fb131SSeungwon Jeon err = bus_width; 996a4924c71SGirish K S break; 997577fb131SSeungwon Jeon } else { 998577fb131SSeungwon Jeon pr_warn("%s: switch to bus width %d failed\n", 999ed9feec7SWolfram Sang mmc_hostname(host), 1 << bus_width); 1000577fb131SSeungwon Jeon } 1001a4924c71SGirish K S } 1002a4924c71SGirish K S 1003577fb131SSeungwon Jeon return err; 1004577fb131SSeungwon Jeon } 1005577fb131SSeungwon Jeon 1006577fb131SSeungwon Jeon /* 1007577fb131SSeungwon Jeon * Switch to the high-speed mode 1008577fb131SSeungwon Jeon */ 1009577fb131SSeungwon Jeon static int mmc_select_hs(struct mmc_card *card) 1010577fb131SSeungwon Jeon { 1011577fb131SSeungwon Jeon int err; 1012577fb131SSeungwon Jeon 10134509f847SUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1014577fb131SSeungwon Jeon EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 1015aa33ce3cSUlf Hansson card->ext_csd.generic_cmd6_time, 0, 101608573eafSChaotian Jing true, false, true); 101708573eafSChaotian Jing if (!err) { 1018577fb131SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 101908573eafSChaotian Jing err = mmc_switch_status(card); 102008573eafSChaotian Jing } 1021577fb131SSeungwon Jeon 102267d35960SJungseung Lee if (err) 102367d35960SJungseung Lee pr_warn("%s: switch to high-speed failed, err:%d\n", 102467d35960SJungseung Lee mmc_hostname(card->host), err); 102567d35960SJungseung Lee 1026577fb131SSeungwon Jeon return err; 1027577fb131SSeungwon Jeon } 1028577fb131SSeungwon Jeon 1029577fb131SSeungwon Jeon /* 1030577fb131SSeungwon Jeon * Activate wide bus and DDR if supported. 1031577fb131SSeungwon Jeon */ 1032577fb131SSeungwon Jeon static int mmc_select_hs_ddr(struct mmc_card *card) 1033577fb131SSeungwon Jeon { 1034577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1035577fb131SSeungwon Jeon u32 bus_width, ext_csd_bits; 1036577fb131SSeungwon Jeon int err = 0; 1037577fb131SSeungwon Jeon 1038577fb131SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) 1039577fb131SSeungwon Jeon return 0; 1040577fb131SSeungwon Jeon 1041577fb131SSeungwon Jeon bus_width = host->ios.bus_width; 1042577fb131SSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 1043577fb131SSeungwon Jeon return 0; 1044577fb131SSeungwon Jeon 1045577fb131SSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 1046577fb131SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 1047577fb131SSeungwon Jeon 1048577fb131SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1049577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH, 1050577fb131SSeungwon Jeon ext_csd_bits, 1051577fb131SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1052577fb131SSeungwon Jeon if (err) { 10534b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width %d ddr failed\n", 1054577fb131SSeungwon Jeon mmc_hostname(host), 1 << bus_width); 1055577fb131SSeungwon Jeon return err; 1056577fb131SSeungwon Jeon } 1057577fb131SSeungwon Jeon 1058577fb131SSeungwon Jeon /* 1059577fb131SSeungwon Jeon * eMMC cards can support 3.3V to 1.2V i/o (vccq) 1060577fb131SSeungwon Jeon * signaling. 1061577fb131SSeungwon Jeon * 1062577fb131SSeungwon Jeon * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 1063577fb131SSeungwon Jeon * 1064577fb131SSeungwon Jeon * 1.8V vccq at 3.3V core voltage (vcc) is not required 1065577fb131SSeungwon Jeon * in the JEDEC spec for DDR. 1066577fb131SSeungwon Jeon * 1067312449efSChuanxiao.Dong * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all 1068312449efSChuanxiao.Dong * host controller can support this, like some of the SDHCI 1069312449efSChuanxiao.Dong * controller which connect to an eMMC device. Some of these 1070312449efSChuanxiao.Dong * host controller still needs to use 1.8v vccq for supporting 1071312449efSChuanxiao.Dong * DDR mode. 1072312449efSChuanxiao.Dong * 1073312449efSChuanxiao.Dong * So the sequence will be: 1074312449efSChuanxiao.Dong * if (host and device can both support 1.2v IO) 1075312449efSChuanxiao.Dong * use 1.2v IO; 1076312449efSChuanxiao.Dong * else if (host and device can both support 1.8v IO) 1077312449efSChuanxiao.Dong * use 1.8v IO; 1078312449efSChuanxiao.Dong * so if host and device can only support 3.3v IO, this is the 1079312449efSChuanxiao.Dong * last choice. 1080577fb131SSeungwon Jeon * 1081577fb131SSeungwon Jeon * WARNING: eMMC rules are NOT the same as SD DDR 1082577fb131SSeungwon Jeon */ 1083312449efSChuanxiao.Dong err = -EINVAL; 1084312449efSChuanxiao.Dong if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 1085312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1086577fb131SSeungwon Jeon 1087312449efSChuanxiao.Dong if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V)) 1088312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1089312449efSChuanxiao.Dong 1090312449efSChuanxiao.Dong /* make sure vccq is 3.3v after switching disaster */ 1091312449efSChuanxiao.Dong if (err) 1092312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1093312449efSChuanxiao.Dong 1094312449efSChuanxiao.Dong if (!err) 1095577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 1096577fb131SSeungwon Jeon 1097577fb131SSeungwon Jeon return err; 1098577fb131SSeungwon Jeon } 1099577fb131SSeungwon Jeon 11000a5b6438SSeungwon Jeon static int mmc_select_hs400(struct mmc_card *card) 11010a5b6438SSeungwon Jeon { 11020a5b6438SSeungwon Jeon struct mmc_host *host = card->host; 110351b12f77SAdrian Hunter unsigned int max_dtr; 11040a5b6438SSeungwon Jeon int err = 0; 1105cc4f414cSAdrian Hunter u8 val; 11060a5b6438SSeungwon Jeon 11070a5b6438SSeungwon Jeon /* 11080a5b6438SSeungwon Jeon * HS400 mode requires 8-bit bus width 11090a5b6438SSeungwon Jeon */ 11100a5b6438SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 11110a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8)) 11120a5b6438SSeungwon Jeon return 0; 11130a5b6438SSeungwon Jeon 111451b12f77SAdrian Hunter /* Switch card to HS mode */ 1115adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 11160a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1117cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 1118aa33ce3cSUlf Hansson card->ext_csd.generic_cmd6_time, 0, 111908573eafSChaotian Jing true, false, true); 11200a5b6438SSeungwon Jeon if (err) { 11214b75bffcSAndrew Gabbasov pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", 11220a5b6438SSeungwon Jeon mmc_hostname(host), err); 11230a5b6438SSeungwon Jeon return err; 11240a5b6438SSeungwon Jeon } 11250a5b6438SSeungwon Jeon 112651b12f77SAdrian Hunter /* Set host controller to HS timing */ 112751b12f77SAdrian Hunter mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 112851b12f77SAdrian Hunter 1129649c6059SZiyuan Xu /* Reduce frequency to HS frequency */ 1130649c6059SZiyuan Xu max_dtr = card->ext_csd.hs_max_dtr; 1131649c6059SZiyuan Xu mmc_set_clock(host, max_dtr); 1132649c6059SZiyuan Xu 1133d2302933SAdrian Hunter err = mmc_switch_status(card); 1134d2302933SAdrian Hunter if (err) 1135d2302933SAdrian Hunter goto out_err; 1136d2302933SAdrian Hunter 1137d2302933SAdrian Hunter /* Switch card to DDR */ 11380a5b6438SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 11390a5b6438SSeungwon Jeon EXT_CSD_BUS_WIDTH, 11400a5b6438SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8, 11410a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time); 11420a5b6438SSeungwon Jeon if (err) { 11434b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width for hs400 failed, err:%d\n", 11440a5b6438SSeungwon Jeon mmc_hostname(host), err); 11450a5b6438SSeungwon Jeon return err; 11460a5b6438SSeungwon Jeon } 11470a5b6438SSeungwon Jeon 1148d2302933SAdrian Hunter /* Switch card to HS400 */ 1149cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS400 | 1150cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 11510a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1152cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 1153aa33ce3cSUlf Hansson card->ext_csd.generic_cmd6_time, 0, 115408573eafSChaotian Jing true, false, true); 11550a5b6438SSeungwon Jeon if (err) { 11564b75bffcSAndrew Gabbasov pr_err("%s: switch to hs400 failed, err:%d\n", 11570a5b6438SSeungwon Jeon mmc_hostname(host), err); 11580a5b6438SSeungwon Jeon return err; 11590a5b6438SSeungwon Jeon } 11600a5b6438SSeungwon Jeon 1161d2302933SAdrian Hunter /* Set host controller to HS400 timing and frequency */ 11620a5b6438SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS400); 11630a5b6438SSeungwon Jeon mmc_set_bus_speed(card); 11640a5b6438SSeungwon Jeon 1165d2302933SAdrian Hunter err = mmc_switch_status(card); 1166d2302933SAdrian Hunter if (err) 1167d2302933SAdrian Hunter goto out_err; 1168d2302933SAdrian Hunter 11690a5b6438SSeungwon Jeon return 0; 1170d2302933SAdrian Hunter 1171d2302933SAdrian Hunter out_err: 1172d2302933SAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1173d2302933SAdrian Hunter __func__, err); 1174d2302933SAdrian Hunter return err; 11750a5b6438SSeungwon Jeon } 11760a5b6438SSeungwon Jeon 11776376f69dSAdrian Hunter int mmc_hs200_to_hs400(struct mmc_card *card) 11786376f69dSAdrian Hunter { 11796376f69dSAdrian Hunter return mmc_select_hs400(card); 11806376f69dSAdrian Hunter } 11816376f69dSAdrian Hunter 11826376f69dSAdrian Hunter int mmc_hs400_to_hs200(struct mmc_card *card) 11836376f69dSAdrian Hunter { 11846376f69dSAdrian Hunter struct mmc_host *host = card->host; 11856376f69dSAdrian Hunter unsigned int max_dtr; 11866376f69dSAdrian Hunter int err; 1187cc4f414cSAdrian Hunter u8 val; 11886376f69dSAdrian Hunter 11896376f69dSAdrian Hunter /* Reduce frequency to HS */ 11906376f69dSAdrian Hunter max_dtr = card->ext_csd.hs_max_dtr; 11916376f69dSAdrian Hunter mmc_set_clock(host, max_dtr); 11926376f69dSAdrian Hunter 11936376f69dSAdrian Hunter /* Switch HS400 to HS DDR */ 1194adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 11956376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1196aa33ce3cSUlf Hansson val, card->ext_csd.generic_cmd6_time, 0, 119708573eafSChaotian Jing true, false, true); 11986376f69dSAdrian Hunter if (err) 11996376f69dSAdrian Hunter goto out_err; 12006376f69dSAdrian Hunter 12016376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 12026376f69dSAdrian Hunter 12036376f69dSAdrian Hunter err = mmc_switch_status(card); 12046376f69dSAdrian Hunter if (err) 12056376f69dSAdrian Hunter goto out_err; 12066376f69dSAdrian Hunter 12076376f69dSAdrian Hunter /* Switch HS DDR to HS */ 12086376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 12096376f69dSAdrian Hunter EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, 1210aa33ce3cSUlf Hansson 0, true, false, true); 12116376f69dSAdrian Hunter if (err) 12126376f69dSAdrian Hunter goto out_err; 12136376f69dSAdrian Hunter 12146376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS); 12156376f69dSAdrian Hunter 12166376f69dSAdrian Hunter err = mmc_switch_status(card); 12176376f69dSAdrian Hunter if (err) 12186376f69dSAdrian Hunter goto out_err; 12196376f69dSAdrian Hunter 12206376f69dSAdrian Hunter /* Switch HS to HS200 */ 1221cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1222cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 12236376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1224aa33ce3cSUlf Hansson val, card->ext_csd.generic_cmd6_time, 0, 122508573eafSChaotian Jing true, false, true); 12266376f69dSAdrian Hunter if (err) 12276376f69dSAdrian Hunter goto out_err; 12286376f69dSAdrian Hunter 12296376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS200); 12306376f69dSAdrian Hunter 12316376f69dSAdrian Hunter err = mmc_switch_status(card); 12326376f69dSAdrian Hunter if (err) 12336376f69dSAdrian Hunter goto out_err; 12346376f69dSAdrian Hunter 12356376f69dSAdrian Hunter mmc_set_bus_speed(card); 12366376f69dSAdrian Hunter 12376376f69dSAdrian Hunter return 0; 12386376f69dSAdrian Hunter 12396376f69dSAdrian Hunter out_err: 12406376f69dSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 12416376f69dSAdrian Hunter __func__, err); 12426376f69dSAdrian Hunter return err; 12436376f69dSAdrian Hunter } 12446376f69dSAdrian Hunter 124581ac2af6SShawn Lin static int mmc_select_hs400es(struct mmc_card *card) 124681ac2af6SShawn Lin { 124781ac2af6SShawn Lin struct mmc_host *host = card->host; 124881ac2af6SShawn Lin int err = 0; 124981ac2af6SShawn Lin u8 val; 125081ac2af6SShawn Lin 125181ac2af6SShawn Lin if (!(host->caps & MMC_CAP_8_BIT_DATA)) { 125281ac2af6SShawn Lin err = -ENOTSUPP; 125381ac2af6SShawn Lin goto out_err; 125481ac2af6SShawn Lin } 125581ac2af6SShawn Lin 12561720d354SShawn Lin if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) 12571720d354SShawn Lin err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 12581720d354SShawn Lin 12591720d354SShawn Lin if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) 12601720d354SShawn Lin err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 12611720d354SShawn Lin 12621720d354SShawn Lin /* If fails try again during next card power cycle */ 12631720d354SShawn Lin if (err) 12641720d354SShawn Lin goto out_err; 12651720d354SShawn Lin 126681ac2af6SShawn Lin err = mmc_select_bus_width(card); 126781ac2af6SShawn Lin if (err < 0) 126881ac2af6SShawn Lin goto out_err; 126981ac2af6SShawn Lin 127081ac2af6SShawn Lin /* Switch card to HS mode */ 127181ac2af6SShawn Lin err = mmc_select_hs(card); 127267d35960SJungseung Lee if (err) 127381ac2af6SShawn Lin goto out_err; 127481ac2af6SShawn Lin 12754f25580fSShawn Lin mmc_set_clock(host, card->ext_csd.hs_max_dtr); 12764f25580fSShawn Lin 127781ac2af6SShawn Lin err = mmc_switch_status(card); 127881ac2af6SShawn Lin if (err) 127981ac2af6SShawn Lin goto out_err; 128081ac2af6SShawn Lin 128181ac2af6SShawn Lin /* Switch card to DDR with strobe bit */ 128281ac2af6SShawn Lin val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; 128381ac2af6SShawn Lin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 128481ac2af6SShawn Lin EXT_CSD_BUS_WIDTH, 128581ac2af6SShawn Lin val, 128681ac2af6SShawn Lin card->ext_csd.generic_cmd6_time); 128781ac2af6SShawn Lin if (err) { 128881ac2af6SShawn Lin pr_err("%s: switch to bus width for hs400es failed, err:%d\n", 128981ac2af6SShawn Lin mmc_hostname(host), err); 129081ac2af6SShawn Lin goto out_err; 129181ac2af6SShawn Lin } 129281ac2af6SShawn Lin 129381ac2af6SShawn Lin /* Switch card to HS400 */ 129481ac2af6SShawn Lin val = EXT_CSD_TIMING_HS400 | 129581ac2af6SShawn Lin card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 129681ac2af6SShawn Lin err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 129781ac2af6SShawn Lin EXT_CSD_HS_TIMING, val, 1298aa33ce3cSUlf Hansson card->ext_csd.generic_cmd6_time, 0, 129981ac2af6SShawn Lin true, false, true); 130081ac2af6SShawn Lin if (err) { 130181ac2af6SShawn Lin pr_err("%s: switch to hs400es failed, err:%d\n", 130281ac2af6SShawn Lin mmc_hostname(host), err); 130381ac2af6SShawn Lin goto out_err; 130481ac2af6SShawn Lin } 130581ac2af6SShawn Lin 130681ac2af6SShawn Lin /* Set host controller to HS400 timing and frequency */ 130781ac2af6SShawn Lin mmc_set_timing(host, MMC_TIMING_MMC_HS400); 130881ac2af6SShawn Lin 130981ac2af6SShawn Lin /* Controller enable enhanced strobe function */ 131081ac2af6SShawn Lin host->ios.enhanced_strobe = true; 131181ac2af6SShawn Lin if (host->ops->hs400_enhanced_strobe) 131281ac2af6SShawn Lin host->ops->hs400_enhanced_strobe(host, &host->ios); 131381ac2af6SShawn Lin 131481ac2af6SShawn Lin err = mmc_switch_status(card); 131581ac2af6SShawn Lin if (err) 131681ac2af6SShawn Lin goto out_err; 131781ac2af6SShawn Lin 131881ac2af6SShawn Lin return 0; 131981ac2af6SShawn Lin 132081ac2af6SShawn Lin out_err: 132181ac2af6SShawn Lin pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 132281ac2af6SShawn Lin __func__, err); 132381ac2af6SShawn Lin return err; 132481ac2af6SShawn Lin } 132581ac2af6SShawn Lin 1326cc4f414cSAdrian Hunter static void mmc_select_driver_type(struct mmc_card *card) 1327cc4f414cSAdrian Hunter { 1328cc4f414cSAdrian Hunter int card_drv_type, drive_strength, drv_type; 1329cc4f414cSAdrian Hunter 1330cc4f414cSAdrian Hunter card_drv_type = card->ext_csd.raw_driver_strength | 1331cc4f414cSAdrian Hunter mmc_driver_type_mask(0); 1332cc4f414cSAdrian Hunter 1333cc4f414cSAdrian Hunter drive_strength = mmc_select_drive_strength(card, 1334cc4f414cSAdrian Hunter card->ext_csd.hs200_max_dtr, 1335cc4f414cSAdrian Hunter card_drv_type, &drv_type); 1336cc4f414cSAdrian Hunter 1337cc4f414cSAdrian Hunter card->drive_strength = drive_strength; 1338cc4f414cSAdrian Hunter 1339cc4f414cSAdrian Hunter if (drv_type) 1340cc4f414cSAdrian Hunter mmc_set_driver_type(card->host, drv_type); 1341cc4f414cSAdrian Hunter } 1342cc4f414cSAdrian Hunter 1343577fb131SSeungwon Jeon /* 1344577fb131SSeungwon Jeon * For device supporting HS200 mode, the following sequence 1345577fb131SSeungwon Jeon * should be done before executing the tuning process. 1346577fb131SSeungwon Jeon * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) 1347577fb131SSeungwon Jeon * 2. switch to HS200 mode 1348577fb131SSeungwon Jeon * 3. set the clock to > 52Mhz and <=200MHz 1349577fb131SSeungwon Jeon */ 1350577fb131SSeungwon Jeon static int mmc_select_hs200(struct mmc_card *card) 1351577fb131SSeungwon Jeon { 1352577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1353e51534c8SDong Aisheng unsigned int old_timing, old_signal_voltage; 1354577fb131SSeungwon Jeon int err = -EINVAL; 1355cc4f414cSAdrian Hunter u8 val; 1356577fb131SSeungwon Jeon 1357e51534c8SDong Aisheng old_signal_voltage = host->ios.signal_voltage; 1358577fb131SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) 1359577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1360577fb131SSeungwon Jeon 1361577fb131SSeungwon Jeon if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) 1362577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1363577fb131SSeungwon Jeon 1364577fb131SSeungwon Jeon /* If fails try again during next card power cycle */ 1365577fb131SSeungwon Jeon if (err) 1366e51534c8SDong Aisheng return err; 1367577fb131SSeungwon Jeon 1368cc4f414cSAdrian Hunter mmc_select_driver_type(card); 1369cc4f414cSAdrian Hunter 1370577fb131SSeungwon Jeon /* 1371577fb131SSeungwon Jeon * Set the bus width(4 or 8) with host's support and 1372577fb131SSeungwon Jeon * switch to HS200 mode if bus width is set successfully. 1373577fb131SSeungwon Jeon */ 1374577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 13758b7be8f2SPeter Griffin if (err > 0) { 1376cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1377cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1378577fb131SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1379cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 1380aa33ce3cSUlf Hansson card->ext_csd.generic_cmd6_time, 0, 138108573eafSChaotian Jing true, false, true); 13821815e61bSAdrian Hunter if (err) 13831815e61bSAdrian Hunter goto err; 13841815e61bSAdrian Hunter old_timing = host->ios.timing; 1385577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS200); 138608573eafSChaotian Jing 13871815e61bSAdrian Hunter err = mmc_switch_status(card); 13881815e61bSAdrian Hunter /* 13891815e61bSAdrian Hunter * mmc_select_timing() assumes timing has not changed if 13901815e61bSAdrian Hunter * it is a switch error. 13911815e61bSAdrian Hunter */ 13921815e61bSAdrian Hunter if (err == -EBADMSG) 13931815e61bSAdrian Hunter mmc_set_timing(host, old_timing); 13941815e61bSAdrian Hunter } 1395a4924c71SGirish K S err: 1396e51534c8SDong Aisheng if (err) { 1397e51534c8SDong Aisheng /* fall back to the old signal voltage, if fails report error */ 1398e51534c8SDong Aisheng if (__mmc_set_signal_voltage(host, old_signal_voltage)) 1399e51534c8SDong Aisheng err = -EIO; 1400e51534c8SDong Aisheng 14011815e61bSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 14021815e61bSAdrian Hunter __func__, err); 1403e51534c8SDong Aisheng } 1404a4924c71SGirish K S return err; 1405a4924c71SGirish K S } 1406a4924c71SGirish K S 1407a4924c71SGirish K S /* 140881ac2af6SShawn Lin * Activate High Speed, HS200 or HS400ES mode if supported. 1409577fb131SSeungwon Jeon */ 1410577fb131SSeungwon Jeon static int mmc_select_timing(struct mmc_card *card) 1411577fb131SSeungwon Jeon { 1412577fb131SSeungwon Jeon int err = 0; 1413577fb131SSeungwon Jeon 1414148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 1415577fb131SSeungwon Jeon goto bus_speed; 1416577fb131SSeungwon Jeon 141781ac2af6SShawn Lin if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) 141881ac2af6SShawn Lin err = mmc_select_hs400es(card); 141981ac2af6SShawn Lin else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) 1420577fb131SSeungwon Jeon err = mmc_select_hs200(card); 1421577fb131SSeungwon Jeon else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) 1422577fb131SSeungwon Jeon err = mmc_select_hs(card); 1423577fb131SSeungwon Jeon 1424577fb131SSeungwon Jeon if (err && err != -EBADMSG) 1425577fb131SSeungwon Jeon return err; 1426577fb131SSeungwon Jeon 1427577fb131SSeungwon Jeon bus_speed: 1428577fb131SSeungwon Jeon /* 1429577fb131SSeungwon Jeon * Set the bus speed to the selected bus timing. 1430577fb131SSeungwon Jeon * If timing is not selected, backward compatible is the default. 1431577fb131SSeungwon Jeon */ 1432577fb131SSeungwon Jeon mmc_set_bus_speed(card); 14330400ed0aSDong Aisheng return 0; 1434577fb131SSeungwon Jeon } 1435577fb131SSeungwon Jeon 1436577fb131SSeungwon Jeon /* 1437577fb131SSeungwon Jeon * Execute tuning sequence to seek the proper bus operating 14380a5b6438SSeungwon Jeon * conditions for HS200 and HS400, which sends CMD21 to the device. 1439577fb131SSeungwon Jeon */ 1440577fb131SSeungwon Jeon static int mmc_hs200_tuning(struct mmc_card *card) 1441577fb131SSeungwon Jeon { 1442577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1443577fb131SSeungwon Jeon 14440a5b6438SSeungwon Jeon /* 14450a5b6438SSeungwon Jeon * Timing should be adjusted to the HS400 target 14460a5b6438SSeungwon Jeon * operation frequency for tuning process 14470a5b6438SSeungwon Jeon */ 14480a5b6438SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 14490a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8) 14500a5b6438SSeungwon Jeon if (host->ops->prepare_hs400_tuning) 14510a5b6438SSeungwon Jeon host->ops->prepare_hs400_tuning(host, &host->ios); 14520a5b6438SSeungwon Jeon 145363e415c6SAdrian Hunter return mmc_execute_tuning(card); 1454577fb131SSeungwon Jeon } 1455577fb131SSeungwon Jeon 1456577fb131SSeungwon Jeon /* 14576abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 14586abaa0c9SPierre Ossman * 14598769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 14606abaa0c9SPierre Ossman * we're trying to reinitialise. 14617ea239d9SPierre Ossman */ 14628c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 14636abaa0c9SPierre Ossman struct mmc_card *oldcard) 14647ea239d9SPierre Ossman { 14657ea239d9SPierre Ossman struct mmc_card *card; 1466577fb131SSeungwon Jeon int err; 14677ea239d9SPierre Ossman u32 cid[4]; 1468b676f039SPhilip Rakity u32 rocr; 14697ea239d9SPierre Ossman 14707ea239d9SPierre Ossman BUG_ON(!host); 1471d84075c8SPierre Ossman WARN_ON(!host->claimed); 14727ea239d9SPierre Ossman 147344669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 147444669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 147544669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 147644669034SStefan Nilsson XK 14777ea239d9SPierre Ossman /* 14787ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 14797ea239d9SPierre Ossman * need to tell some cards to go back to the idle 14807ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 14817ea239d9SPierre Ossman * respond. 1482c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 14837ea239d9SPierre Ossman */ 14847ea239d9SPierre Ossman mmc_go_idle(host); 14857ea239d9SPierre Ossman 14867ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 1487b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 148817b0429dSPierre Ossman if (err) 14896abaa0c9SPierre Ossman goto err; 14907ea239d9SPierre Ossman 14917ea239d9SPierre Ossman /* 1492af517150SDavid Brownell * For SPI, enable CRC as appropriate. 1493af517150SDavid Brownell */ 1494af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1495af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 1496af517150SDavid Brownell if (err) 1497af517150SDavid Brownell goto err; 1498af517150SDavid Brownell } 1499af517150SDavid Brownell 1500af517150SDavid Brownell /* 15017ea239d9SPierre Ossman * Fetch CID from card. 15027ea239d9SPierre Ossman */ 1503af517150SDavid Brownell if (mmc_host_is_spi(host)) 1504af517150SDavid Brownell err = mmc_send_cid(host, cid); 1505af517150SDavid Brownell else 15067ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 150717b0429dSPierre Ossman if (err) 15087ea239d9SPierre Ossman goto err; 15097ea239d9SPierre Ossman 15106abaa0c9SPierre Ossman if (oldcard) { 1511adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1512adf66a0dSPierre Ossman err = -ENOENT; 15136abaa0c9SPierre Ossman goto err; 1514adf66a0dSPierre Ossman } 15156abaa0c9SPierre Ossman 15166abaa0c9SPierre Ossman card = oldcard; 15176abaa0c9SPierre Ossman } else { 15187ea239d9SPierre Ossman /* 15197ea239d9SPierre Ossman * Allocate card structure. 15207ea239d9SPierre Ossman */ 152151ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 1522adf66a0dSPierre Ossman if (IS_ERR(card)) { 1523adf66a0dSPierre Ossman err = PTR_ERR(card); 15247ea239d9SPierre Ossman goto err; 1525adf66a0dSPierre Ossman } 15267ea239d9SPierre Ossman 152769041150SUlf Hansson card->ocr = ocr; 15287ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 15297ea239d9SPierre Ossman card->rca = 1; 15307ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 15316abaa0c9SPierre Ossman } 15327ea239d9SPierre Ossman 15337ea239d9SPierre Ossman /* 1534eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 1535eac86321SDoug Anderson */ 1536eac86321SDoug Anderson if (host->ops->init_card) 1537eac86321SDoug Anderson host->ops->init_card(host, card); 1538eac86321SDoug Anderson 1539eac86321SDoug Anderson /* 1540af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 15417ea239d9SPierre Ossman */ 1542af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15437ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 154417b0429dSPierre Ossman if (err) 15457ea239d9SPierre Ossman goto free_card; 15467ea239d9SPierre Ossman 15477ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 1548af517150SDavid Brownell } 15497ea239d9SPierre Ossman 15506abaa0c9SPierre Ossman if (!oldcard) { 15517ea239d9SPierre Ossman /* 15527ea239d9SPierre Ossman * Fetch CSD from card. 15537ea239d9SPierre Ossman */ 15547ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 155517b0429dSPierre Ossman if (err) 15567ea239d9SPierre Ossman goto free_card; 15577ea239d9SPierre Ossman 1558bd766312SPierre Ossman err = mmc_decode_csd(card); 1559adf66a0dSPierre Ossman if (err) 1560bd766312SPierre Ossman goto free_card; 1561bd766312SPierre Ossman err = mmc_decode_cid(card); 1562adf66a0dSPierre Ossman if (err) 1563bd766312SPierre Ossman goto free_card; 15646abaa0c9SPierre Ossman } 15657ea239d9SPierre Ossman 15667ea239d9SPierre Ossman /* 15673d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 15683d705d14SSascha Hauer * DSR configuration 15693d705d14SSascha Hauer */ 15703d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 15713d705d14SSascha Hauer mmc_set_dsr(host); 15723d705d14SSascha Hauer 15733d705d14SSascha Hauer /* 157489a73cf5SPierre Ossman * Select card, as all following commands rely on that. 15757ea239d9SPierre Ossman */ 1576af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15777ea239d9SPierre Ossman err = mmc_select_card(card); 157817b0429dSPierre Ossman if (err) 15797ea239d9SPierre Ossman goto free_card; 1580af517150SDavid Brownell } 15817ea239d9SPierre Ossman 15826abaa0c9SPierre Ossman if (!oldcard) { 1583076ec38aSUlf Hansson /* Read extended CSD. */ 1584076ec38aSUlf Hansson err = mmc_read_ext_csd(card); 158517b0429dSPierre Ossman if (err) 15867ea239d9SPierre Ossman goto free_card; 1587b676f039SPhilip Rakity 158887e88659SMasahiro Yamada /* 158987e88659SMasahiro Yamada * If doing byte addressing, check if required to do sector 1590b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 1591b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 1592b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 1593b676f039SPhilip Rakity */ 159487e88659SMasahiro Yamada if (rocr & BIT(30)) 1595b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 1596b676f039SPhilip Rakity 1597dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 1598dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 15996abaa0c9SPierre Ossman } 16007ea239d9SPierre Ossman 16017ea239d9SPierre Ossman /* 1602709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 1603709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 1604709de99dSChuanxiao Dong */ 160569803d4fSGrégory Soutadé if (card->ext_csd.partition_setting_completed || 160683bb24aaSAdrian Hunter (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { 1607709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1608b23cf0bdSSeungwon Jeon EXT_CSD_ERASE_GROUP_DEF, 1, 1609b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1610709de99dSChuanxiao Dong 1611709de99dSChuanxiao Dong if (err && err != -EBADMSG) 1612709de99dSChuanxiao Dong goto free_card; 1613709de99dSChuanxiao Dong 1614709de99dSChuanxiao Dong if (err) { 1615709de99dSChuanxiao Dong err = 0; 1616709de99dSChuanxiao Dong /* 1617709de99dSChuanxiao Dong * Just disable enhanced area off & sz 1618709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 1619709de99dSChuanxiao Dong * during next time reinit 1620709de99dSChuanxiao Dong */ 1621709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 1622709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 1623709de99dSChuanxiao Dong } else { 1624709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 1625709de99dSChuanxiao Dong /* 1626709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 1627709de99dSChuanxiao Dong * This will affect the erase size, so 1628709de99dSChuanxiao Dong * here need to reset erase size 1629709de99dSChuanxiao Dong */ 1630709de99dSChuanxiao Dong mmc_set_erase_size(card); 1631709de99dSChuanxiao Dong } 1632709de99dSChuanxiao Dong } 1633709de99dSChuanxiao Dong 1634709de99dSChuanxiao Dong /* 163541e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 163641e2a489SPhilip Rakity */ 1637371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 1638371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 1639371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 1640371a689fSAndrei Warkentin card->ext_csd.part_config, 1641371a689fSAndrei Warkentin card->ext_csd.part_time); 1642371a689fSAndrei Warkentin if (err && err != -EBADMSG) 1643371a689fSAndrei Warkentin goto free_card; 164441e2a489SPhilip Rakity } 164541e2a489SPhilip Rakity 164641e2a489SPhilip Rakity /* 164743235679SUlf Hansson * Enable power_off_notification byte in the ext_csd register 1648bec8726aSGirish K S */ 164943235679SUlf Hansson if (card->ext_csd.rev >= 6) { 1650bec8726aSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1651bec8726aSGirish K S EXT_CSD_POWER_OFF_NOTIFICATION, 1652bec8726aSGirish K S EXT_CSD_POWER_ON, 1653bec8726aSGirish K S card->ext_csd.generic_cmd6_time); 1654bec8726aSGirish K S if (err && err != -EBADMSG) 1655bec8726aSGirish K S goto free_card; 1656bec8726aSGirish K S 165796a85d54SGirish K S /* 165896a85d54SGirish K S * The err can be -EBADMSG or 0, 165996a85d54SGirish K S * so check for success and update the flag 166096a85d54SGirish K S */ 1661bec8726aSGirish K S if (!err) 1662e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; 166396a85d54SGirish K S } 1664bec8726aSGirish K S 1665bec8726aSGirish K S /* 1666577fb131SSeungwon Jeon * Select timing interface 166789a73cf5SPierre Ossman */ 1668577fb131SSeungwon Jeon err = mmc_select_timing(card); 1669577fb131SSeungwon Jeon if (err) 167089a73cf5SPierre Ossman goto free_card; 167189a73cf5SPierre Ossman 1672a4924c71SGirish K S if (mmc_card_hs200(card)) { 1673577fb131SSeungwon Jeon err = mmc_hs200_tuning(card); 16744c4cb171SPhilip Rakity if (err) 16754b75bffcSAndrew Gabbasov goto free_card; 16760a5b6438SSeungwon Jeon 16770a5b6438SSeungwon Jeon err = mmc_select_hs400(card); 16780a5b6438SSeungwon Jeon if (err) 16794b75bffcSAndrew Gabbasov goto free_card; 1680577fb131SSeungwon Jeon } else if (mmc_card_hs(card)) { 1681577fb131SSeungwon Jeon /* Select the desired bus width optionally */ 1682577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 16838b7be8f2SPeter Griffin if (err > 0) { 1684577fb131SSeungwon Jeon err = mmc_select_hs_ddr(card); 1685577fb131SSeungwon Jeon if (err) 16864b75bffcSAndrew Gabbasov goto free_card; 168789a73cf5SPierre Ossman } 1688ef0b27d4SAdrian Hunter } 168989a73cf5SPierre Ossman 1690881d1c25SSeungwon Jeon /* 16912385049dSSeungwon Jeon * Choose the power class with selected bus interface 16922385049dSSeungwon Jeon */ 16932385049dSSeungwon Jeon mmc_select_powerclass(card); 16942385049dSSeungwon Jeon 16952385049dSSeungwon Jeon /* 169652d0974eSSubhash Jadavani * Enable HPI feature (if supported) 169752d0974eSSubhash Jadavani */ 169852d0974eSSubhash Jadavani if (card->ext_csd.hpi) { 169952d0974eSSubhash Jadavani err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 170052d0974eSSubhash Jadavani EXT_CSD_HPI_MGMT, 1, 170152d0974eSSubhash Jadavani card->ext_csd.generic_cmd6_time); 170252d0974eSSubhash Jadavani if (err && err != -EBADMSG) 170352d0974eSSubhash Jadavani goto free_card; 170452d0974eSSubhash Jadavani if (err) { 17056606110dSJoe Perches pr_warn("%s: Enabling HPI failed\n", 170652d0974eSSubhash Jadavani mmc_hostname(card->host)); 170752d0974eSSubhash Jadavani err = 0; 170852d0974eSSubhash Jadavani } else 170952d0974eSSubhash Jadavani card->ext_csd.hpi_en = 1; 171052d0974eSSubhash Jadavani } 171152d0974eSSubhash Jadavani 171252d0974eSSubhash Jadavani /* 1713881d1c25SSeungwon Jeon * If cache size is higher than 0, this indicates 1714881d1c25SSeungwon Jeon * the existence of cache and it can be turned on. 1715881d1c25SSeungwon Jeon */ 17165320226aSPratibhasagar V if (!mmc_card_broken_hpi(card) && 17175320226aSPratibhasagar V card->ext_csd.cache_size > 0) { 1718881d1c25SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 17198bc0678bSSeungwon Jeon EXT_CSD_CACHE_CTRL, 1, 17208bc0678bSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1721881d1c25SSeungwon Jeon if (err && err != -EBADMSG) 1722881d1c25SSeungwon Jeon goto free_card; 1723881d1c25SSeungwon Jeon 1724881d1c25SSeungwon Jeon /* 1725881d1c25SSeungwon Jeon * Only if no error, cache is turned on successfully. 1726881d1c25SSeungwon Jeon */ 17278bc0678bSSeungwon Jeon if (err) { 17286606110dSJoe Perches pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", 17298bc0678bSSeungwon Jeon mmc_hostname(card->host), err); 17308bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 0; 17318bc0678bSSeungwon Jeon err = 0; 17328bc0678bSSeungwon Jeon } else { 17338bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 1; 17348bc0678bSSeungwon Jeon } 1735881d1c25SSeungwon Jeon } 1736881d1c25SSeungwon Jeon 1737abd9ac14SSeungwon Jeon /* 1738abd9ac14SSeungwon Jeon * The mandatory minimum values are defined for packed command. 1739abd9ac14SSeungwon Jeon * read: 5, write: 3 1740abd9ac14SSeungwon Jeon */ 1741abd9ac14SSeungwon Jeon if (card->ext_csd.max_packed_writes >= 3 && 1742abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads >= 5 && 1743abd9ac14SSeungwon Jeon host->caps2 & MMC_CAP2_PACKED_CMD) { 1744abd9ac14SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1745abd9ac14SSeungwon Jeon EXT_CSD_EXP_EVENTS_CTRL, 1746abd9ac14SSeungwon Jeon EXT_CSD_PACKED_EVENT_EN, 1747abd9ac14SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1748abd9ac14SSeungwon Jeon if (err && err != -EBADMSG) 1749abd9ac14SSeungwon Jeon goto free_card; 1750abd9ac14SSeungwon Jeon if (err) { 1751abd9ac14SSeungwon Jeon pr_warn("%s: Enabling packed event failed\n", 1752abd9ac14SSeungwon Jeon mmc_hostname(card->host)); 1753abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 0; 1754abd9ac14SSeungwon Jeon err = 0; 1755abd9ac14SSeungwon Jeon } else { 1756abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 1; 1757abd9ac14SSeungwon Jeon } 1758abd9ac14SSeungwon Jeon } 1759abd9ac14SSeungwon Jeon 17606abaa0c9SPierre Ossman if (!oldcard) 17617ea239d9SPierre Ossman host->card = card; 17627ea239d9SPierre Ossman 176317b0429dSPierre Ossman return 0; 17646abaa0c9SPierre Ossman 17656abaa0c9SPierre Ossman free_card: 17666abaa0c9SPierre Ossman if (!oldcard) 17676abaa0c9SPierre Ossman mmc_remove_card(card); 17686abaa0c9SPierre Ossman err: 1769adf66a0dSPierre Ossman return err; 17706abaa0c9SPierre Ossman } 17716abaa0c9SPierre Ossman 177207a68216SUlf Hansson static int mmc_can_sleep(struct mmc_card *card) 177307a68216SUlf Hansson { 177407a68216SUlf Hansson return (card && card->ext_csd.rev >= 3); 177507a68216SUlf Hansson } 177607a68216SUlf Hansson 177707a68216SUlf Hansson static int mmc_sleep(struct mmc_host *host) 177807a68216SUlf Hansson { 177907a68216SUlf Hansson struct mmc_command cmd = {0}; 178007a68216SUlf Hansson struct mmc_card *card = host->card; 1781cb962e04SUlf Hansson unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); 178207a68216SUlf Hansson int err; 178307a68216SUlf Hansson 1784436f8daaSAdrian Hunter /* Re-tuning can't be done once the card is deselected */ 1785436f8daaSAdrian Hunter mmc_retune_hold(host); 1786436f8daaSAdrian Hunter 178707a68216SUlf Hansson err = mmc_deselect_cards(host); 178807a68216SUlf Hansson if (err) 1789436f8daaSAdrian Hunter goto out_release; 179007a68216SUlf Hansson 179107a68216SUlf Hansson cmd.opcode = MMC_SLEEP_AWAKE; 179207a68216SUlf Hansson cmd.arg = card->rca << 16; 179307a68216SUlf Hansson cmd.arg |= 1 << 15; 179407a68216SUlf Hansson 1795cb962e04SUlf Hansson /* 1796cb962e04SUlf Hansson * If the max_busy_timeout of the host is specified, validate it against 1797cb962e04SUlf Hansson * the sleep cmd timeout. A failure means we need to prevent the host 1798cb962e04SUlf Hansson * from doing hw busy detection, which is done by converting to a R1 1799cb962e04SUlf Hansson * response instead of a R1B. 1800cb962e04SUlf Hansson */ 1801cb962e04SUlf Hansson if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { 1802cb962e04SUlf Hansson cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1803cb962e04SUlf Hansson } else { 180407a68216SUlf Hansson cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 1805cb962e04SUlf Hansson cmd.busy_timeout = timeout_ms; 1806cb962e04SUlf Hansson } 1807cb962e04SUlf Hansson 180807a68216SUlf Hansson err = mmc_wait_for_cmd(host, &cmd, 0); 180907a68216SUlf Hansson if (err) 1810436f8daaSAdrian Hunter goto out_release; 181107a68216SUlf Hansson 181207a68216SUlf Hansson /* 181307a68216SUlf Hansson * If the host does not wait while the card signals busy, then we will 181407a68216SUlf Hansson * will have to wait the sleep/awake timeout. Note, we cannot use the 181507a68216SUlf Hansson * SEND_STATUS command to poll the status because that command (and most 181607a68216SUlf Hansson * others) is invalid while the card sleeps. 181707a68216SUlf Hansson */ 1818cb962e04SUlf Hansson if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) 1819cb962e04SUlf Hansson mmc_delay(timeout_ms); 182007a68216SUlf Hansson 1821436f8daaSAdrian Hunter out_release: 1822436f8daaSAdrian Hunter mmc_retune_release(host); 182307a68216SUlf Hansson return err; 182407a68216SUlf Hansson } 182507a68216SUlf Hansson 1826e6c08586SUlf Hansson static int mmc_can_poweroff_notify(const struct mmc_card *card) 1827e6c08586SUlf Hansson { 1828e6c08586SUlf Hansson return card && 1829e6c08586SUlf Hansson mmc_card_mmc(card) && 1830e6c08586SUlf Hansson (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); 1831e6c08586SUlf Hansson } 1832e6c08586SUlf Hansson 1833e6c08586SUlf Hansson static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) 1834e6c08586SUlf Hansson { 1835e6c08586SUlf Hansson unsigned int timeout = card->ext_csd.generic_cmd6_time; 1836e6c08586SUlf Hansson int err; 1837e6c08586SUlf Hansson 1838e6c08586SUlf Hansson /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ 1839e6c08586SUlf Hansson if (notify_type == EXT_CSD_POWER_OFF_LONG) 1840e6c08586SUlf Hansson timeout = card->ext_csd.power_off_longtime; 1841e6c08586SUlf Hansson 1842878e200bSUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1843e6c08586SUlf Hansson EXT_CSD_POWER_OFF_NOTIFICATION, 1844aa33ce3cSUlf Hansson notify_type, timeout, 0, true, false, false); 1845e6c08586SUlf Hansson if (err) 1846e6c08586SUlf Hansson pr_err("%s: Power Off Notification timed out, %u\n", 1847e6c08586SUlf Hansson mmc_hostname(card->host), timeout); 1848e6c08586SUlf Hansson 1849e6c08586SUlf Hansson /* Disable the power off notification after the switch operation. */ 1850e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; 1851e6c08586SUlf Hansson 1852e6c08586SUlf Hansson return err; 1853e6c08586SUlf Hansson } 1854e6c08586SUlf Hansson 18556abaa0c9SPierre Ossman /* 18566abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 18576abaa0c9SPierre Ossman */ 18586abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 18596abaa0c9SPierre Ossman { 18606abaa0c9SPierre Ossman BUG_ON(!host); 18616abaa0c9SPierre Ossman BUG_ON(!host->card); 18626abaa0c9SPierre Ossman 18636abaa0c9SPierre Ossman mmc_remove_card(host->card); 18646abaa0c9SPierre Ossman host->card = NULL; 18656abaa0c9SPierre Ossman } 18666abaa0c9SPierre Ossman 18676abaa0c9SPierre Ossman /* 1868d3049504SAdrian Hunter * Card detection - card is alive. 1869d3049504SAdrian Hunter */ 1870d3049504SAdrian Hunter static int mmc_alive(struct mmc_host *host) 1871d3049504SAdrian Hunter { 1872d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1873d3049504SAdrian Hunter } 1874d3049504SAdrian Hunter 1875d3049504SAdrian Hunter /* 18766abaa0c9SPierre Ossman * Card detection callback from host. 18776abaa0c9SPierre Ossman */ 18786abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 18796abaa0c9SPierre Ossman { 18806abaa0c9SPierre Ossman int err; 18816abaa0c9SPierre Ossman 18826abaa0c9SPierre Ossman BUG_ON(!host); 18836abaa0c9SPierre Ossman BUG_ON(!host->card); 18846abaa0c9SPierre Ossman 1885e94cfef6SUlf Hansson mmc_get_card(host->card); 18866abaa0c9SPierre Ossman 18876abaa0c9SPierre Ossman /* 18886abaa0c9SPierre Ossman * Just check if our card has been removed. 18896abaa0c9SPierre Ossman */ 1890d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 18916abaa0c9SPierre Ossman 1892e94cfef6SUlf Hansson mmc_put_card(host->card); 18937ea239d9SPierre Ossman 189417b0429dSPierre Ossman if (err) { 18954101c16aSPierre Ossman mmc_remove(host); 18966abaa0c9SPierre Ossman 18976abaa0c9SPierre Ossman mmc_claim_host(host); 18986abaa0c9SPierre Ossman mmc_detach_bus(host); 18997f7e4129SUlf Hansson mmc_power_off(host); 19006abaa0c9SPierre Ossman mmc_release_host(host); 19016abaa0c9SPierre Ossman } 19026abaa0c9SPierre Ossman } 19036abaa0c9SPierre Ossman 190403d071fcSUlf Hansson static int _mmc_suspend(struct mmc_host *host, bool is_suspend) 19056abaa0c9SPierre Ossman { 1906c3805467SBalaji T K int err = 0; 190703d071fcSUlf Hansson unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : 190803d071fcSUlf Hansson EXT_CSD_POWER_OFF_LONG; 1909c3805467SBalaji T K 19106abaa0c9SPierre Ossman BUG_ON(!host); 19116abaa0c9SPierre Ossman BUG_ON(!host->card); 19126abaa0c9SPierre Ossman 19136abaa0c9SPierre Ossman mmc_claim_host(host); 1914881d926dSMaya Erez 19159ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 19169ec775f7SUlf Hansson goto out; 19179ec775f7SUlf Hansson 191839b9431bSUlf Hansson if (mmc_card_doing_bkops(host->card)) { 191939b9431bSUlf Hansson err = mmc_stop_bkops(host->card); 192039b9431bSUlf Hansson if (err) 192139b9431bSUlf Hansson goto out; 192239b9431bSUlf Hansson } 192339b9431bSUlf Hansson 192410e5d965SUlf Hansson err = mmc_flush_cache(host->card); 1925881d926dSMaya Erez if (err) 1926881d926dSMaya Erez goto out; 1927881d926dSMaya Erez 192843235679SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 192953275c21SUlf Hansson ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend)) 193003d071fcSUlf Hansson err = mmc_poweroff_notify(host->card, notify_type); 193107a68216SUlf Hansson else if (mmc_can_sleep(host->card)) 193207a68216SUlf Hansson err = mmc_sleep(host); 1933e6c08586SUlf Hansson else if (!mmc_host_is_spi(host)) 193485e727edSJaehoon Chung err = mmc_deselect_cards(host); 193595cdfb72SNicolas Pitre 19369ec775f7SUlf Hansson if (!err) { 193774590263SUlf Hansson mmc_power_off(host); 19389ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 19399ec775f7SUlf Hansson } 1940881d926dSMaya Erez out: 1941881d926dSMaya Erez mmc_release_host(host); 1942c3805467SBalaji T K return err; 19436abaa0c9SPierre Ossman } 19446abaa0c9SPierre Ossman 19456abaa0c9SPierre Ossman /* 19460cb403a2SUlf Hansson * Suspend callback 194703d071fcSUlf Hansson */ 194803d071fcSUlf Hansson static int mmc_suspend(struct mmc_host *host) 194903d071fcSUlf Hansson { 19500cb403a2SUlf Hansson int err; 19510cb403a2SUlf Hansson 19520cb403a2SUlf Hansson err = _mmc_suspend(host, true); 19530cb403a2SUlf Hansson if (!err) { 19540cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 19550cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 19560cb403a2SUlf Hansson } 19570cb403a2SUlf Hansson 19580cb403a2SUlf Hansson return err; 195903d071fcSUlf Hansson } 196003d071fcSUlf Hansson 196103d071fcSUlf Hansson /* 19626abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 19636abaa0c9SPierre Ossman * and, if so, restore all state to it. 19646abaa0c9SPierre Ossman */ 19650cb403a2SUlf Hansson static int _mmc_resume(struct mmc_host *host) 19666abaa0c9SPierre Ossman { 19679ec775f7SUlf Hansson int err = 0; 19686abaa0c9SPierre Ossman 19696abaa0c9SPierre Ossman BUG_ON(!host); 19706abaa0c9SPierre Ossman BUG_ON(!host->card); 19716abaa0c9SPierre Ossman 19726abaa0c9SPierre Ossman mmc_claim_host(host); 19739ec775f7SUlf Hansson 19749ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 19759ec775f7SUlf Hansson goto out; 19769ec775f7SUlf Hansson 197769041150SUlf Hansson mmc_power_up(host, host->card->ocr); 197869041150SUlf Hansson err = mmc_init_card(host, host->card->ocr, host->card); 19799ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 19802986d0bfSPierre Ossman 19819ec775f7SUlf Hansson out: 19829ec775f7SUlf Hansson mmc_release_host(host); 198395cdfb72SNicolas Pitre return err; 19846abaa0c9SPierre Ossman } 19856abaa0c9SPierre Ossman 19869ec775f7SUlf Hansson /* 19879ec775f7SUlf Hansson * Shutdown callback 19889ec775f7SUlf Hansson */ 19899ec775f7SUlf Hansson static int mmc_shutdown(struct mmc_host *host) 19909ec775f7SUlf Hansson { 19919ec775f7SUlf Hansson int err = 0; 19929ec775f7SUlf Hansson 19939ec775f7SUlf Hansson /* 19949ec775f7SUlf Hansson * In a specific case for poweroff notify, we need to resume the card 19959ec775f7SUlf Hansson * before we can shutdown it properly. 19969ec775f7SUlf Hansson */ 19979ec775f7SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 19989ec775f7SUlf Hansson !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) 19990cb403a2SUlf Hansson err = _mmc_resume(host); 20009ec775f7SUlf Hansson 20019ec775f7SUlf Hansson if (!err) 20029ec775f7SUlf Hansson err = _mmc_suspend(host, false); 20039ec775f7SUlf Hansson 20049ec775f7SUlf Hansson return err; 20059ec775f7SUlf Hansson } 2006c4d770d7SUlf Hansson 2007c4d770d7SUlf Hansson /* 20080cb403a2SUlf Hansson * Callback for resume. 20090cb403a2SUlf Hansson */ 20100cb403a2SUlf Hansson static int mmc_resume(struct mmc_host *host) 20110cb403a2SUlf Hansson { 20120cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 2013c29536e8SUlf Hansson return 0; 20140cb403a2SUlf Hansson } 20150cb403a2SUlf Hansson 20160cb403a2SUlf Hansson /* 2017c4d770d7SUlf Hansson * Callback for runtime_suspend. 2018c4d770d7SUlf Hansson */ 2019c4d770d7SUlf Hansson static int mmc_runtime_suspend(struct mmc_host *host) 2020c4d770d7SUlf Hansson { 2021c4d770d7SUlf Hansson int err; 2022c4d770d7SUlf Hansson 2023c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 2024c4d770d7SUlf Hansson return 0; 2025c4d770d7SUlf Hansson 20260cb403a2SUlf Hansson err = _mmc_suspend(host, true); 20270cc81a8cSUlf Hansson if (err) 2028f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 2029c4d770d7SUlf Hansson mmc_hostname(host), err); 2030c4d770d7SUlf Hansson 2031c4d770d7SUlf Hansson return err; 2032c4d770d7SUlf Hansson } 2033c4d770d7SUlf Hansson 2034c4d770d7SUlf Hansson /* 2035c4d770d7SUlf Hansson * Callback for runtime_resume. 2036c4d770d7SUlf Hansson */ 2037c4d770d7SUlf Hansson static int mmc_runtime_resume(struct mmc_host *host) 2038c4d770d7SUlf Hansson { 2039c4d770d7SUlf Hansson int err; 2040c4d770d7SUlf Hansson 20410cb403a2SUlf Hansson err = _mmc_resume(host); 2042520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 2043c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 2044c4d770d7SUlf Hansson mmc_hostname(host), err); 2045c4d770d7SUlf Hansson 2046c4d770d7SUlf Hansson return 0; 2047c4d770d7SUlf Hansson } 2048c4d770d7SUlf Hansson 2049f855a371SJohan Rudholm int mmc_can_reset(struct mmc_card *card) 2050f855a371SJohan Rudholm { 2051f855a371SJohan Rudholm u8 rst_n_function; 2052f855a371SJohan Rudholm 2053f855a371SJohan Rudholm rst_n_function = card->ext_csd.rst_n_function; 2054f855a371SJohan Rudholm if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) 2055f855a371SJohan Rudholm return 0; 2056f855a371SJohan Rudholm return 1; 2057f855a371SJohan Rudholm } 2058f855a371SJohan Rudholm EXPORT_SYMBOL(mmc_can_reset); 2059f855a371SJohan Rudholm 2060f855a371SJohan Rudholm static int mmc_reset(struct mmc_host *host) 2061f855a371SJohan Rudholm { 2062f855a371SJohan Rudholm struct mmc_card *card = host->card; 2063f855a371SJohan Rudholm 2064437db4c6SAdrian Hunter /* 2065437db4c6SAdrian Hunter * In the case of recovery, we can't expect flushing the cache to work 2066437db4c6SAdrian Hunter * always, but we have a go and ignore errors. 2067437db4c6SAdrian Hunter */ 2068437db4c6SAdrian Hunter mmc_flush_cache(host->card); 2069437db4c6SAdrian Hunter 20704e6c7178SGwendal Grignou if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset && 20714e6c7178SGwendal Grignou mmc_can_reset(card)) { 20724e6c7178SGwendal Grignou /* If the card accept RST_n signal, send it. */ 2073f855a371SJohan Rudholm mmc_set_clock(host, host->f_init); 2074f855a371SJohan Rudholm host->ops->hw_reset(host); 2075f855a371SJohan Rudholm /* Set initial state and call mmc_set_ios */ 2076f855a371SJohan Rudholm mmc_set_initial_state(host); 20774e6c7178SGwendal Grignou } else { 20784e6c7178SGwendal Grignou /* Do a brute force power cycle */ 20794e6c7178SGwendal Grignou mmc_power_cycle(host, card->ocr); 20804e6c7178SGwendal Grignou } 2081364549ddSUlf Hansson return mmc_init_card(host, card->ocr, card); 2082f855a371SJohan Rudholm } 2083f855a371SJohan Rudholm 20849feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 20859feae246SAdrian Hunter .remove = mmc_remove, 20869feae246SAdrian Hunter .detect = mmc_detect, 20879feae246SAdrian Hunter .suspend = mmc_suspend, 20889feae246SAdrian Hunter .resume = mmc_resume, 2089c4d770d7SUlf Hansson .runtime_suspend = mmc_runtime_suspend, 2090c4d770d7SUlf Hansson .runtime_resume = mmc_runtime_resume, 2091d3049504SAdrian Hunter .alive = mmc_alive, 2092486fdbbcSUlf Hansson .shutdown = mmc_shutdown, 2093f855a371SJohan Rudholm .reset = mmc_reset, 20949feae246SAdrian Hunter }; 20959feae246SAdrian Hunter 20966abaa0c9SPierre Ossman /* 20976abaa0c9SPierre Ossman * Starting point for MMC card init. 20986abaa0c9SPierre Ossman */ 2099807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 21006abaa0c9SPierre Ossman { 21016abaa0c9SPierre Ossman int err; 210269041150SUlf Hansson u32 ocr, rocr; 21036abaa0c9SPierre Ossman 21046abaa0c9SPierre Ossman BUG_ON(!host); 2105d84075c8SPierre Ossman WARN_ON(!host->claimed); 21066abaa0c9SPierre Ossman 210744669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 210844669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 210944669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 211044669034SStefan Nilsson XK 2111807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 2112807e8e40SAndy Ross if (err) 2113807e8e40SAndy Ross return err; 2114807e8e40SAndy Ross 21152501c917SUlf Hansson mmc_attach_bus(host, &mmc_ops); 21168f230f45STakashi Iwai if (host->ocr_avail_mmc) 21178f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 21186abaa0c9SPierre Ossman 21196abaa0c9SPierre Ossman /* 2120af517150SDavid Brownell * We need to get OCR a different way for SPI. 2121af517150SDavid Brownell */ 2122af517150SDavid Brownell if (mmc_host_is_spi(host)) { 2123af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 2124af517150SDavid Brownell if (err) 2125af517150SDavid Brownell goto err; 2126af517150SDavid Brownell } 2127af517150SDavid Brownell 212869041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 21296abaa0c9SPierre Ossman 21306abaa0c9SPierre Ossman /* 21316abaa0c9SPierre Ossman * Can we support the voltage of the card? 21326abaa0c9SPierre Ossman */ 213369041150SUlf Hansson if (!rocr) { 2134109b5bedSPierre Ossman err = -EINVAL; 21356abaa0c9SPierre Ossman goto err; 2136109b5bedSPierre Ossman } 21376abaa0c9SPierre Ossman 21386abaa0c9SPierre Ossman /* 21396abaa0c9SPierre Ossman * Detect and init the card. 21406abaa0c9SPierre Ossman */ 214169041150SUlf Hansson err = mmc_init_card(host, rocr, NULL); 214217b0429dSPierre Ossman if (err) 21436abaa0c9SPierre Ossman goto err; 21446abaa0c9SPierre Ossman 21456abaa0c9SPierre Ossman mmc_release_host(host); 21464101c16aSPierre Ossman err = mmc_add_card(host->card); 21477ea239d9SPierre Ossman if (err) 21482986d0bfSPierre Ossman goto remove_card; 21497ea239d9SPierre Ossman 21502860d060SSergei Shtylyov mmc_claim_host(host); 21517ea239d9SPierre Ossman return 0; 21527ea239d9SPierre Ossman 21532986d0bfSPierre Ossman remove_card: 21546abaa0c9SPierre Ossman mmc_remove_card(host->card); 21552986d0bfSPierre Ossman mmc_claim_host(host); 2156807e8e40SAndy Ross host->card = NULL; 21577ea239d9SPierre Ossman err: 21587ea239d9SPierre Ossman mmc_detach_bus(host); 21597ea239d9SPierre Ossman 2160a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising MMC card\n", 2161109b5bedSPierre Ossman mmc_hostname(host), err); 2162109b5bedSPierre Ossman 2163adf66a0dSPierre Ossman return err; 21647ea239d9SPierre Ossman } 2165