17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/mmc.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 67ea239d9SPierre Ossman * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. 77ea239d9SPierre Ossman * 87ea239d9SPierre Ossman * This program is free software; you can redistribute it and/or modify 97ea239d9SPierre Ossman * it under the terms of the GNU General Public License version 2 as 107ea239d9SPierre Ossman * published by the Free Software Foundation. 117ea239d9SPierre Ossman */ 127ea239d9SPierre Ossman 137ea239d9SPierre Ossman #include <linux/err.h> 1481f8a7beSHans de Goede #include <linux/of.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 160205a904SPaul Gortmaker #include <linux/stat.h> 170cb403a2SUlf Hansson #include <linux/pm_runtime.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include <linux/mmc/host.h> 207ea239d9SPierre Ossman #include <linux/mmc/card.h> 217ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 227ea239d9SPierre Ossman 237ea239d9SPierre Ossman #include "core.h" 24436f8daaSAdrian Hunter #include "host.h" 254101c16aSPierre Ossman #include "bus.h" 267ea239d9SPierre Ossman #include "mmc_ops.h" 274c4cb171SPhilip Rakity #include "sd_ops.h" 287ea239d9SPierre Ossman 297ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 307ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 317ea239d9SPierre Ossman 0, 0, 0, 0 327ea239d9SPierre Ossman }; 337ea239d9SPierre Ossman 347ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 357ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 367ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 377ea239d9SPierre Ossman }; 387ea239d9SPierre Ossman 397ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 407ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 417ea239d9SPierre Ossman }; 427ea239d9SPierre Ossman 437ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 447ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 457ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 467ea239d9SPierre Ossman }; 477ea239d9SPierre Ossman 487ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 497ea239d9SPierre Ossman ({ \ 507ea239d9SPierre Ossman const int __size = size; \ 517ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 527ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 537ea239d9SPierre Ossman const int __shft = (start) & 31; \ 547ea239d9SPierre Ossman u32 __res; \ 557ea239d9SPierre Ossman \ 567ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 577ea239d9SPierre Ossman if (__size + __shft > 32) \ 587ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 597ea239d9SPierre Ossman __res & __mask; \ 607ea239d9SPierre Ossman }) 617ea239d9SPierre Ossman 627ea239d9SPierre Ossman /* 637ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 647ea239d9SPierre Ossman */ 65bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 667ea239d9SPierre Ossman { 677ea239d9SPierre Ossman u32 *resp = card->raw_cid; 687ea239d9SPierre Ossman 697ea239d9SPierre Ossman /* 707ea239d9SPierre Ossman * The selection of the format here is based upon published 717ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 727ea239d9SPierre Ossman */ 737ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 747ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 757ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 767ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 777ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 787ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 797ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 807ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 817ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 827ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 837ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 847ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 857ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 867ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 877ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 887ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 897ea239d9SPierre Ossman break; 907ea239d9SPierre Ossman 917ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 927ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 937ea239d9SPierre Ossman case 4: /* MMC v4 */ 947ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 957ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 967ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 977ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 987ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 997ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 1007ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 1017ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 10251e7e8b6SBernie Thompson card->cid.prv = UNSTUFF_BITS(resp, 48, 8); 1037ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 1047ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 1057ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1067ea239d9SPierre Ossman break; 1077ea239d9SPierre Ossman 1087ea239d9SPierre Ossman default: 109a3c76eb9SGirish K S pr_err("%s: card has unknown MMCA version %d\n", 1107ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 111bd766312SPierre Ossman return -EINVAL; 1127ea239d9SPierre Ossman } 113bd766312SPierre Ossman 114bd766312SPierre Ossman return 0; 1157ea239d9SPierre Ossman } 1167ea239d9SPierre Ossman 117dfe86cbaSAdrian Hunter static void mmc_set_erase_size(struct mmc_card *card) 118dfe86cbaSAdrian Hunter { 119dfe86cbaSAdrian Hunter if (card->ext_csd.erase_group_def & 1) 120dfe86cbaSAdrian Hunter card->erase_size = card->ext_csd.hc_erase_size; 121dfe86cbaSAdrian Hunter else 122dfe86cbaSAdrian Hunter card->erase_size = card->csd.erase_size; 123dfe86cbaSAdrian Hunter 124dfe86cbaSAdrian Hunter mmc_init_erase(card); 125dfe86cbaSAdrian Hunter } 126dfe86cbaSAdrian Hunter 1277ea239d9SPierre Ossman /* 1287ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1297ea239d9SPierre Ossman */ 130bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1317ea239d9SPierre Ossman { 1327ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 133dfe86cbaSAdrian Hunter unsigned int e, m, a, b; 1347ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1357ea239d9SPierre Ossman 1367ea239d9SPierre Ossman /* 1377ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1387ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1396da24b78SKyungmin Park * We also support eMMC v4.4 & v4.41. 1407ea239d9SPierre Ossman */ 1416da24b78SKyungmin Park csd->structure = UNSTUFF_BITS(resp, 126, 2); 1426da24b78SKyungmin Park if (csd->structure == 0) { 143a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1446da24b78SKyungmin Park mmc_hostname(card->host), csd->structure); 145bd766312SPierre Ossman return -EINVAL; 1467ea239d9SPierre Ossman } 1477ea239d9SPierre Ossman 1487ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1497ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1507ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1517ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1527ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1537ea239d9SPierre Ossman 1547ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1557ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1567ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1577ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1587ea239d9SPierre Ossman 1597ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1607ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1617ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1627ea239d9SPierre Ossman 1637ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1647ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1657ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1667ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1673d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1687ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1697ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1707ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 171bd766312SPierre Ossman 172dfe86cbaSAdrian Hunter if (csd->write_blkbits >= 9) { 173dfe86cbaSAdrian Hunter a = UNSTUFF_BITS(resp, 42, 5); 174dfe86cbaSAdrian Hunter b = UNSTUFF_BITS(resp, 37, 5); 175dfe86cbaSAdrian Hunter csd->erase_size = (a + 1) * (b + 1); 176dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 177dfe86cbaSAdrian Hunter } 178dfe86cbaSAdrian Hunter 179bd766312SPierre Ossman return 0; 1807ea239d9SPierre Ossman } 1817ea239d9SPierre Ossman 18296cf5f02SSeungwon Jeon static void mmc_select_card_type(struct mmc_card *card) 18396cf5f02SSeungwon Jeon { 18496cf5f02SSeungwon Jeon struct mmc_host *host = card->host; 1850a5b6438SSeungwon Jeon u8 card_type = card->ext_csd.raw_card_type; 1865f1a4dd0SLee Jones u32 caps = host->caps, caps2 = host->caps2; 187577fb131SSeungwon Jeon unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; 1882415c0efSSeungwon Jeon unsigned int avail_type = 0; 18996cf5f02SSeungwon Jeon 19096cf5f02SSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 1912415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_26) { 1922415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_26_MAX_DTR; 1932415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_26; 1942415c0efSSeungwon Jeon } 1952415c0efSSeungwon Jeon 1962415c0efSSeungwon Jeon if (caps & MMC_CAP_MMC_HIGHSPEED && 1972415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS_52) { 19896cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_52_MAX_DTR; 1992415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS_52; 2002415c0efSSeungwon Jeon } 20196cf5f02SSeungwon Jeon 2022415c0efSSeungwon Jeon if (caps & MMC_CAP_1_8V_DDR && 2032415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { 20496cf5f02SSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2052415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; 2062415c0efSSeungwon Jeon } 20796cf5f02SSeungwon Jeon 2082415c0efSSeungwon Jeon if (caps & MMC_CAP_1_2V_DDR && 2092415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { 2102415c0efSSeungwon Jeon hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; 2112415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; 2122415c0efSSeungwon Jeon } 2132415c0efSSeungwon Jeon 2142415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_8V_SDR && 2152415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { 216577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2172415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; 2182415c0efSSeungwon Jeon } 2192415c0efSSeungwon Jeon 2202415c0efSSeungwon Jeon if (caps2 & MMC_CAP2_HS200_1_2V_SDR && 2212415c0efSSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { 222577fb131SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2232415c0efSSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; 2242415c0efSSeungwon Jeon } 22596cf5f02SSeungwon Jeon 2260a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_8V && 2270a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { 2280a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2290a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; 2300a5b6438SSeungwon Jeon } 2310a5b6438SSeungwon Jeon 2320a5b6438SSeungwon Jeon if (caps2 & MMC_CAP2_HS400_1_2V && 2330a5b6438SSeungwon Jeon card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { 2340a5b6438SSeungwon Jeon hs200_max_dtr = MMC_HS200_MAX_DTR; 2350a5b6438SSeungwon Jeon avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; 2360a5b6438SSeungwon Jeon } 2370a5b6438SSeungwon Jeon 23881ac2af6SShawn Lin if ((caps2 & MMC_CAP2_HS400_ES) && 23981ac2af6SShawn Lin card->ext_csd.strobe_support && 24081ac2af6SShawn Lin (avail_type & EXT_CSD_CARD_TYPE_HS400)) 24181ac2af6SShawn Lin avail_type |= EXT_CSD_CARD_TYPE_HS400ES; 24281ac2af6SShawn Lin 24396cf5f02SSeungwon Jeon card->ext_csd.hs_max_dtr = hs_max_dtr; 244577fb131SSeungwon Jeon card->ext_csd.hs200_max_dtr = hs200_max_dtr; 2452415c0efSSeungwon Jeon card->mmc_avail_type = avail_type; 24696cf5f02SSeungwon Jeon } 24796cf5f02SSeungwon Jeon 248b4493eeaSGrégory Soutadé static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) 249b4493eeaSGrégory Soutadé { 250994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 251994324bbSGrégory Soutadé 252994324bbSGrégory Soutadé /* 253994324bbSGrégory Soutadé * Disable these attributes by default 254994324bbSGrégory Soutadé */ 255994324bbSGrégory Soutadé card->ext_csd.enhanced_area_offset = -EINVAL; 256994324bbSGrégory Soutadé card->ext_csd.enhanced_area_size = -EINVAL; 257b4493eeaSGrégory Soutadé 258b4493eeaSGrégory Soutadé /* 259b4493eeaSGrégory Soutadé * Enhanced area feature support -- check whether the eMMC 260b4493eeaSGrégory Soutadé * card has the Enhanced area enabled. If so, export enhanced 261b4493eeaSGrégory Soutadé * area offset and size to user by adding sysfs interface. 262b4493eeaSGrégory Soutadé */ 263b4493eeaSGrégory Soutadé if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 264b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 265994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed) { 266b4493eeaSGrégory Soutadé hc_erase_grp_sz = 267b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 268b4493eeaSGrégory Soutadé hc_wp_grp_sz = 269b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 270b4493eeaSGrégory Soutadé 271b4493eeaSGrégory Soutadé /* 272b4493eeaSGrégory Soutadé * calculate the enhanced data area offset, in bytes 273b4493eeaSGrégory Soutadé */ 274b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset = 275ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[139]) << 24) + 276ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[138]) << 16) + 277ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[137]) << 8) + 278ded8a5f9SKuninori Morimoto (((unsigned long long)ext_csd[136])); 279b4493eeaSGrégory Soutadé if (mmc_card_blockaddr(card)) 280b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_offset <<= 9; 281b4493eeaSGrégory Soutadé /* 282b4493eeaSGrégory Soutadé * calculate the enhanced data area size, in kilobytes 283b4493eeaSGrégory Soutadé */ 284b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size = 285b4493eeaSGrégory Soutadé (ext_csd[142] << 16) + (ext_csd[141] << 8) + 286b4493eeaSGrégory Soutadé ext_csd[140]; 287b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size *= 288b4493eeaSGrégory Soutadé (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 289b4493eeaSGrégory Soutadé card->ext_csd.enhanced_area_size <<= 9; 290b4493eeaSGrégory Soutadé } else { 291994324bbSGrégory Soutadé pr_warn("%s: defines enhanced area without partition setting complete\n", 292994324bbSGrégory Soutadé mmc_hostname(card->host)); 293994324bbSGrégory Soutadé } 294b4493eeaSGrégory Soutadé } 295b4493eeaSGrégory Soutadé } 296b4493eeaSGrégory Soutadé 297b4493eeaSGrégory Soutadé static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) 298b4493eeaSGrégory Soutadé { 299b4493eeaSGrégory Soutadé int idx; 300994324bbSGrégory Soutadé u8 hc_erase_grp_sz, hc_wp_grp_sz; 301994324bbSGrégory Soutadé unsigned int part_size; 302b4493eeaSGrégory Soutadé 303b4493eeaSGrégory Soutadé /* 304b4493eeaSGrégory Soutadé * General purpose partition feature support -- 305b4493eeaSGrégory Soutadé * If ext_csd has the size of general purpose partitions, 306b4493eeaSGrégory Soutadé * set size, part_cfg, partition name in mmc_part. 307b4493eeaSGrégory Soutadé */ 308b4493eeaSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 309b4493eeaSGrégory Soutadé EXT_CSD_PART_SUPPORT_PART_EN) { 310b4493eeaSGrégory Soutadé hc_erase_grp_sz = 311b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 312b4493eeaSGrégory Soutadé hc_wp_grp_sz = 313b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 314b4493eeaSGrégory Soutadé 315b4493eeaSGrégory Soutadé for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { 316b4493eeaSGrégory Soutadé if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && 317b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && 318b4493eeaSGrégory Soutadé !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) 319b4493eeaSGrégory Soutadé continue; 320994324bbSGrégory Soutadé if (card->ext_csd.partition_setting_completed == 0) { 321994324bbSGrégory Soutadé pr_warn("%s: has partition size defined without partition complete\n", 322994324bbSGrégory Soutadé mmc_hostname(card->host)); 323994324bbSGrégory Soutadé break; 324994324bbSGrégory Soutadé } 325b4493eeaSGrégory Soutadé part_size = 326b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] 327b4493eeaSGrégory Soutadé << 16) + 328b4493eeaSGrégory Soutadé (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] 329b4493eeaSGrégory Soutadé << 8) + 330b4493eeaSGrégory Soutadé ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; 331b4493eeaSGrégory Soutadé part_size *= (size_t)(hc_erase_grp_sz * 332b4493eeaSGrégory Soutadé hc_wp_grp_sz); 333b4493eeaSGrégory Soutadé mmc_part_add(card, part_size << 19, 334b4493eeaSGrégory Soutadé EXT_CSD_PART_CONFIG_ACC_GP0 + idx, 335b4493eeaSGrégory Soutadé "gp%d", idx, false, 336b4493eeaSGrégory Soutadé MMC_BLK_DATA_AREA_GP); 337b4493eeaSGrégory Soutadé } 338b4493eeaSGrégory Soutadé } 339b4493eeaSGrégory Soutadé } 340b4493eeaSGrégory Soutadé 3411c447116SAdrian Hunter /* Minimum partition switch timeout in milliseconds */ 3421c447116SAdrian Hunter #define MMC_MIN_PART_SWITCH_TIME 300 3431c447116SAdrian Hunter 34408ee80ccSPhilip Rakity /* 34508ee80ccSPhilip Rakity * Decode extended CSD. 34608ee80ccSPhilip Rakity */ 347076ec38aSUlf Hansson static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) 34808ee80ccSPhilip Rakity { 349e0c368d5SNamjae Jeon int err = 0, idx; 350e0c368d5SNamjae Jeon unsigned int part_size; 35181f8a7beSHans de Goede struct device_node *np; 35281f8a7beSHans de Goede bool broken_hpi = false; 35308ee80ccSPhilip Rakity 3546da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 355f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 3566da24b78SKyungmin Park if (card->csd.structure == 3) { 357f39b2dd9SPhilip Rakity if (card->ext_csd.raw_ext_csd_structure > 2) { 358a3c76eb9SGirish K S pr_err("%s: unrecognised EXT_CSD structure " 3598fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 360f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure); 3616da24b78SKyungmin Park err = -EINVAL; 3626da24b78SKyungmin Park goto out; 3636da24b78SKyungmin Park } 3646da24b78SKyungmin Park } 3656da24b78SKyungmin Park 36681f8a7beSHans de Goede np = mmc_of_find_child_device(card->host, 0); 36781f8a7beSHans de Goede if (np && of_device_is_compatible(np, "mmc-card")) 36881f8a7beSHans de Goede broken_hpi = of_property_read_bool(np, "broken-hpi"); 36981f8a7beSHans de Goede of_node_put(np); 37081f8a7beSHans de Goede 37103a59437SRomain Izard /* 37203a59437SRomain Izard * The EXT_CSD format is meant to be forward compatible. As long 37303a59437SRomain Izard * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV 37403a59437SRomain Izard * are authorized, see JEDEC JESD84-B50 section B.8. 37503a59437SRomain Izard */ 3766da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 377d7604d76SPierre Ossman 378f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 379f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 380f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 381f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 382b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 3837ea239d9SPierre Ossman card->ext_csd.sectors = 3847ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 3857ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 3867ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 3877ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 388fc8a0985SHanumath Prasad 389fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 390fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 3917ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 392d7604d76SPierre Ossman } 39396cf5f02SSeungwon Jeon 39481ac2af6SShawn Lin card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; 395f39b2dd9SPhilip Rakity card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 39696cf5f02SSeungwon Jeon mmc_select_card_type(card); 3977ea239d9SPierre Ossman 398f39b2dd9SPhilip Rakity card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 399f39b2dd9SPhilip Rakity card->ext_csd.raw_erase_timeout_mult = 400f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 401f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_grp_size = 402f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 403b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 404b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 405371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 406371a689fSAndrei Warkentin 407371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 408371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 4091c447116SAdrian Hunter /* Some eMMC set the value too low so set a minimum */ 4101c447116SAdrian Hunter if (card->ext_csd.part_time && 4111c447116SAdrian Hunter card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) 4121c447116SAdrian Hunter card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; 413b1ebe384SJarkko Lavinen 414b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 415b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 416b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 417b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 418dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 419dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 420dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 421dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 422dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 423dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 424f4c5522bSAndrei Warkentin 425f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 426371a689fSAndrei Warkentin 427371a689fSAndrei Warkentin /* 428371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 429371a689fSAndrei Warkentin * multiples of 128K. 430371a689fSAndrei Warkentin */ 431e0c368d5SNamjae Jeon if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 432e0c368d5SNamjae Jeon for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 433e0c368d5SNamjae Jeon part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 434e0c368d5SNamjae Jeon mmc_part_add(card, part_size, 435e0c368d5SNamjae Jeon EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 436add710eaSJohan Rudholm "boot%d", idx, true, 437add710eaSJohan Rudholm MMC_BLK_DATA_AREA_BOOT); 438e0c368d5SNamjae Jeon } 439e0c368d5SNamjae Jeon } 440b1ebe384SJarkko Lavinen } 441b1ebe384SJarkko Lavinen 442f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_gap_size = 443dd13b4edSJurgen Heeks ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 444f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_trim_mult = 445f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_TRIM_MULT]; 446f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_erase_mult = 447f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_ERASE_MULT]; 448f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_feature_support = 449f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 450f39b2dd9SPhilip Rakity card->ext_csd.raw_trim_mult = 451f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_TRIM_MULT]; 452836dc2feSPhilip Rakity card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 453b097e07fSAdrian Hunter card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; 454dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 45569803d4fSGrégory Soutadé if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & 45669803d4fSGrégory Soutadé EXT_CSD_PART_SETTING_COMPLETED) 45769803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 1; 45869803d4fSGrégory Soutadé else 45969803d4fSGrégory Soutadé card->ext_csd.partition_setting_completed = 0; 46069803d4fSGrégory Soutadé 461b4493eeaSGrégory Soutadé mmc_manage_enhanced_area(card, ext_csd); 462709de99dSChuanxiao Dong 463b4493eeaSGrégory Soutadé mmc_manage_gp_partitions(card, ext_csd); 464e0c368d5SNamjae Jeon 465dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 466dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 467dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 468dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 469dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 470dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 471dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 472dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 473add710eaSJohan Rudholm 474add710eaSJohan Rudholm /* 475add710eaSJohan Rudholm * Note that the call to mmc_part_add above defaults to read 476add710eaSJohan Rudholm * only. If this default assumption is changed, the call must 477add710eaSJohan Rudholm * take into account the value of boot_locked below. 478add710eaSJohan Rudholm */ 479add710eaSJohan Rudholm card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; 480add710eaSJohan Rudholm card->ext_csd.boot_ro_lockable = true; 48160443712SFredrik Soderstedt 48260443712SFredrik Soderstedt /* Save power class values */ 48360443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_195 = 48460443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_195]; 48560443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_195 = 48660443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_195]; 48760443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_52_360 = 48860443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_52_360]; 48960443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_26_360 = 49060443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_26_360]; 49160443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_195 = 49260443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_195]; 49360443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_200_360 = 49460443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_200_360]; 49560443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_195 = 49660443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; 49760443712SFredrik Soderstedt card->ext_csd.raw_pwr_cl_ddr_52_360 = 49860443712SFredrik Soderstedt ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; 4990a5b6438SSeungwon Jeon card->ext_csd.raw_pwr_cl_ddr_200_360 = 5000a5b6438SSeungwon Jeon ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; 501dfe86cbaSAdrian Hunter } 502dfe86cbaSAdrian Hunter 503b2499518SAdrian Hunter if (card->ext_csd.rev >= 5) { 5047c4f10acSRomain Izard /* Adjust production date as per JEDEC JESD84-B451 */ 5057c4f10acSRomain Izard if (card->cid.year < 2010) 5067c4f10acSRomain Izard card->cid.year += 16; 5077c4f10acSRomain Izard 508950d56acSJaehoon Chung /* check whether the eMMC card supports BKOPS */ 509950d56acSJaehoon Chung if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { 510950d56acSJaehoon Chung card->ext_csd.bkops = 1; 5110501be64SAlexey Skidanov card->ext_csd.man_bkops_en = 5120501be64SAlexey Skidanov (ext_csd[EXT_CSD_BKOPS_EN] & 5130501be64SAlexey Skidanov EXT_CSD_MANUAL_BKOPS_MASK); 514950d56acSJaehoon Chung card->ext_csd.raw_bkops_status = 515950d56acSJaehoon Chung ext_csd[EXT_CSD_BKOPS_STATUS]; 5160501be64SAlexey Skidanov if (!card->ext_csd.man_bkops_en) 5174ec96b4cSWolfram Sang pr_debug("%s: MAN_BKOPS_EN bit is not set\n", 518950d56acSJaehoon Chung mmc_hostname(card->host)); 519950d56acSJaehoon Chung } 520950d56acSJaehoon Chung 521eb0d8f13SJaehoon Chung /* check whether the eMMC card supports HPI */ 52281f8a7beSHans de Goede if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { 523eb0d8f13SJaehoon Chung card->ext_csd.hpi = 1; 524eb0d8f13SJaehoon Chung if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 525eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 526eb0d8f13SJaehoon Chung else 527eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 528eb0d8f13SJaehoon Chung /* 529eb0d8f13SJaehoon Chung * Indicate the maximum timeout to close 530eb0d8f13SJaehoon Chung * a command interrupted by HPI 531eb0d8f13SJaehoon Chung */ 532eb0d8f13SJaehoon Chung card->ext_csd.out_of_int_time = 533eb0d8f13SJaehoon Chung ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 534eb0d8f13SJaehoon Chung } 535eb0d8f13SJaehoon Chung 536f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 537b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 538090d25feSLoic Pallardy 539090d25feSLoic Pallardy /* 540090d25feSLoic Pallardy * RPMB regions are defined in multiples of 128K. 541090d25feSLoic Pallardy */ 542090d25feSLoic Pallardy card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; 543d0123ccaSBalaji T K if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { 544090d25feSLoic Pallardy mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, 545090d25feSLoic Pallardy EXT_CSD_PART_CONFIG_ACC_RPMB, 546090d25feSLoic Pallardy "rpmb", 0, false, 547090d25feSLoic Pallardy MMC_BLK_DATA_AREA_RPMB); 548090d25feSLoic Pallardy } 549b2499518SAdrian Hunter } 550f4c5522bSAndrei Warkentin 5515238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 552dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 553dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 554dfe86cbaSAdrian Hunter else 555dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 556dfe86cbaSAdrian Hunter 557336c716aSSeungwon Jeon /* eMMC v4.5 or later */ 558bec8726aSGirish K S if (card->ext_csd.rev >= 6) { 559336c716aSSeungwon Jeon card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 560336c716aSSeungwon Jeon 561b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 10 * 562b23cf0bdSSeungwon Jeon ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 563bec8726aSGirish K S card->ext_csd.power_off_longtime = 10 * 564bec8726aSGirish K S ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 565b23cf0bdSSeungwon Jeon 566881d1c25SSeungwon Jeon card->ext_csd.cache_size = 567881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 568881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 569881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 570881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 5714265900eSSaugata Das 5724265900eSSaugata Das if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) 5734265900eSSaugata Das card->ext_csd.data_sector_size = 4096; 5744265900eSSaugata Das else 5754265900eSSaugata Das card->ext_csd.data_sector_size = 512; 5764265900eSSaugata Das 5774265900eSSaugata Das if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && 5784265900eSSaugata Das (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { 5794265900eSSaugata Das card->ext_csd.data_tag_unit_size = 5804265900eSSaugata Das ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * 5814265900eSSaugata Das (card->ext_csd.data_sector_size); 5824265900eSSaugata Das } else { 5834265900eSSaugata Das card->ext_csd.data_tag_unit_size = 0; 5844265900eSSaugata Das } 585abd9ac14SSeungwon Jeon 586abd9ac14SSeungwon Jeon card->ext_csd.max_packed_writes = 587abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_WRITES]; 588abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads = 589abd9ac14SSeungwon Jeon ext_csd[EXT_CSD_MAX_PACKED_READS]; 590a5075eb9SSaugata Das } else { 591a5075eb9SSaugata Das card->ext_csd.data_sector_size = 512; 592336c716aSSeungwon Jeon } 593881d1c25SSeungwon Jeon 5940f762426SGwendal Grignou /* eMMC v5 or later */ 5950f762426SGwendal Grignou if (card->ext_csd.rev >= 7) { 5960f762426SGwendal Grignou memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], 5970f762426SGwendal Grignou MMC_FIRMWARE_LEN); 5980f762426SGwendal Grignou card->ext_csd.ffu_capable = 5990f762426SGwendal Grignou (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && 6000f762426SGwendal Grignou !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); 6010f762426SGwendal Grignou } 6027ea239d9SPierre Ossman out: 60308ee80ccSPhilip Rakity return err; 60408ee80ccSPhilip Rakity } 6057ea239d9SPierre Ossman 606076ec38aSUlf Hansson static int mmc_read_ext_csd(struct mmc_card *card) 607076ec38aSUlf Hansson { 608c197787cSUlf Hansson u8 *ext_csd; 609076ec38aSUlf Hansson int err; 610076ec38aSUlf Hansson 611c197787cSUlf Hansson if (!mmc_can_ext_csd(card)) 612c197787cSUlf Hansson return 0; 613c197787cSUlf Hansson 614076ec38aSUlf Hansson err = mmc_get_ext_csd(card, &ext_csd); 615c197787cSUlf Hansson if (err) { 616c197787cSUlf Hansson /* If the host or the card can't do the switch, 617c197787cSUlf Hansson * fail more gracefully. */ 618c197787cSUlf Hansson if ((err != -EINVAL) 619c197787cSUlf Hansson && (err != -ENOSYS) 620c197787cSUlf Hansson && (err != -EFAULT)) 621076ec38aSUlf Hansson return err; 622076ec38aSUlf Hansson 623c197787cSUlf Hansson /* 624c197787cSUlf Hansson * High capacity cards should have this "magic" size 625c197787cSUlf Hansson * stored in their CSD. 626c197787cSUlf Hansson */ 627c197787cSUlf Hansson if (card->csd.capacity == (4096 * 512)) { 628c197787cSUlf Hansson pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", 629c197787cSUlf Hansson mmc_hostname(card->host)); 630c197787cSUlf Hansson } else { 631c197787cSUlf Hansson pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", 632c197787cSUlf Hansson mmc_hostname(card->host)); 633c197787cSUlf Hansson err = 0; 634c197787cSUlf Hansson } 635c197787cSUlf Hansson 636c197787cSUlf Hansson return err; 637c197787cSUlf Hansson } 638c197787cSUlf Hansson 639076ec38aSUlf Hansson err = mmc_decode_ext_csd(card, ext_csd); 640076ec38aSUlf Hansson kfree(ext_csd); 641076ec38aSUlf Hansson return err; 642076ec38aSUlf Hansson } 643076ec38aSUlf Hansson 644f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 64508ee80ccSPhilip Rakity { 64608ee80ccSPhilip Rakity u8 *bw_ext_csd; 64708ee80ccSPhilip Rakity int err; 64808ee80ccSPhilip Rakity 649f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 650f39b2dd9SPhilip Rakity return 0; 65108ee80ccSPhilip Rakity 652f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 653c197787cSUlf Hansson if (err) 654c197787cSUlf Hansson return err; 65508ee80ccSPhilip Rakity 65608ee80ccSPhilip Rakity /* only compare read only fields */ 657dd13b4edSJurgen Heeks err = !((card->ext_csd.raw_partition_support == 65808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 659f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 66008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 661f39b2dd9SPhilip Rakity (card->ext_csd.rev == 66208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 663f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 66408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 665f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 66608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 667f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 66808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 669f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 67008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 671f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 67208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 673f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 67408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 675f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 67608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 677f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 67808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 679f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 68008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 681f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 68208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 683f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 684f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 685f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 686f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 687f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 688f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 689f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 69060443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && 69160443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_195 == 69260443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && 69360443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_195 == 69460443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && 69560443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_52_360 == 69660443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && 69760443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_26_360 == 69860443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && 69960443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_195 == 70060443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && 70160443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_200_360 == 70260443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && 70360443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_195 == 70460443712SFredrik Soderstedt bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && 70560443712SFredrik Soderstedt (card->ext_csd.raw_pwr_cl_ddr_52_360 == 7060a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && 7070a5b6438SSeungwon Jeon (card->ext_csd.raw_pwr_cl_ddr_200_360 == 7080a5b6438SSeungwon Jeon bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); 7090a5b6438SSeungwon Jeon 71008ee80ccSPhilip Rakity if (err) 71108ee80ccSPhilip Rakity err = -EINVAL; 71208ee80ccSPhilip Rakity 71300b41b58SUlf Hansson kfree(bw_ext_csd); 7147ea239d9SPierre Ossman return err; 7157ea239d9SPierre Ossman } 7167ea239d9SPierre Ossman 71751ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 71851ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 71951ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 72051ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 72151ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 722dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 723dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 7240f762426SGwendal Grignou MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); 72551ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 72651ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 72751ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 72851ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 72951e7e8b6SBernie Thompson MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); 73051ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 731709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 732709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 733709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 734188cc042SLoic Pallardy MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); 735188cc042SLoic Pallardy MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); 73651ec92e2SPierre Ossman 7370f762426SGwendal Grignou static ssize_t mmc_fwrev_show(struct device *dev, 7380f762426SGwendal Grignou struct device_attribute *attr, 7390f762426SGwendal Grignou char *buf) 7400f762426SGwendal Grignou { 7410f762426SGwendal Grignou struct mmc_card *card = mmc_dev_to_card(dev); 7420f762426SGwendal Grignou 7430f762426SGwendal Grignou if (card->ext_csd.rev < 7) { 7440f762426SGwendal Grignou return sprintf(buf, "0x%x\n", card->cid.fwrev); 7450f762426SGwendal Grignou } else { 7460f762426SGwendal Grignou return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, 7470f762426SGwendal Grignou card->ext_csd.fwrev); 7480f762426SGwendal Grignou } 7490f762426SGwendal Grignou } 7500f762426SGwendal Grignou 7510f762426SGwendal Grignou static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); 7520f762426SGwendal Grignou 75351ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 75451ec92e2SPierre Ossman &dev_attr_cid.attr, 75551ec92e2SPierre Ossman &dev_attr_csd.attr, 75651ec92e2SPierre Ossman &dev_attr_date.attr, 757dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 758dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 75951ec92e2SPierre Ossman &dev_attr_fwrev.attr, 7600f762426SGwendal Grignou &dev_attr_ffu_capable.attr, 76151ec92e2SPierre Ossman &dev_attr_hwrev.attr, 76251ec92e2SPierre Ossman &dev_attr_manfid.attr, 76351ec92e2SPierre Ossman &dev_attr_name.attr, 76451ec92e2SPierre Ossman &dev_attr_oemid.attr, 76551e7e8b6SBernie Thompson &dev_attr_prv.attr, 76651ec92e2SPierre Ossman &dev_attr_serial.attr, 767709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 768709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 769188cc042SLoic Pallardy &dev_attr_raw_rpmb_size_mult.attr, 770188cc042SLoic Pallardy &dev_attr_rel_sectors.attr, 77151ec92e2SPierre Ossman NULL, 77251ec92e2SPierre Ossman }; 773d1e58212SAxel Lin ATTRIBUTE_GROUPS(mmc_std); 77451ec92e2SPierre Ossman 77551ec92e2SPierre Ossman static struct device_type mmc_type = { 776d1e58212SAxel Lin .groups = mmc_std_groups, 77751ec92e2SPierre Ossman }; 77851ec92e2SPierre Ossman 7797ea239d9SPierre Ossman /* 780b87d8dbfSGirish K S * Select the PowerClass for the current bus width 781b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 782b87d8dbfSGirish K S * extended CSD register, select it by executing the 783b87d8dbfSGirish K S * mmc_switch command. 784b87d8dbfSGirish K S */ 7852385049dSSeungwon Jeon static int __mmc_select_powerclass(struct mmc_card *card, 78660443712SFredrik Soderstedt unsigned int bus_width) 787b87d8dbfSGirish K S { 7882385049dSSeungwon Jeon struct mmc_host *host = card->host; 7892385049dSSeungwon Jeon struct mmc_ext_csd *ext_csd = &card->ext_csd; 79060443712SFredrik Soderstedt unsigned int pwrclass_val = 0; 7912385049dSSeungwon Jeon int err = 0; 792b87d8dbfSGirish K S 793b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 794b87d8dbfSGirish K S case MMC_VDD_165_195: 7952385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 7962385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_195; 7972385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 79860443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 7992385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_195 : 8002385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_195; 8012385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8022385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_200_195; 803b87d8dbfSGirish K S break; 80493fc5a47SSubhash Jadavani case MMC_VDD_27_28: 80593fc5a47SSubhash Jadavani case MMC_VDD_28_29: 80693fc5a47SSubhash Jadavani case MMC_VDD_29_30: 80793fc5a47SSubhash Jadavani case MMC_VDD_30_31: 80893fc5a47SSubhash Jadavani case MMC_VDD_31_32: 809b87d8dbfSGirish K S case MMC_VDD_32_33: 810b87d8dbfSGirish K S case MMC_VDD_33_34: 811b87d8dbfSGirish K S case MMC_VDD_34_35: 812b87d8dbfSGirish K S case MMC_VDD_35_36: 8132385049dSSeungwon Jeon if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) 8142385049dSSeungwon Jeon pwrclass_val = ext_csd->raw_pwr_cl_26_360; 8152385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) 81660443712SFredrik Soderstedt pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 8172385049dSSeungwon Jeon ext_csd->raw_pwr_cl_52_360 : 8182385049dSSeungwon Jeon ext_csd->raw_pwr_cl_ddr_52_360; 8192385049dSSeungwon Jeon else if (host->ios.clock <= MMC_HS200_MAX_DTR) 8200a5b6438SSeungwon Jeon pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? 8210a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_ddr_200_360 : 8220a5b6438SSeungwon Jeon ext_csd->raw_pwr_cl_200_360; 823b87d8dbfSGirish K S break; 824b87d8dbfSGirish K S default: 8256606110dSJoe Perches pr_warn("%s: Voltage range not supported for power class\n", 8266606110dSJoe Perches mmc_hostname(host)); 827b87d8dbfSGirish K S return -EINVAL; 828b87d8dbfSGirish K S } 829b87d8dbfSGirish K S 830b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 831b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 832b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 833b87d8dbfSGirish K S else 834b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 835b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 836b87d8dbfSGirish K S 837b87d8dbfSGirish K S /* If the power class is different from the default value */ 838b87d8dbfSGirish K S if (pwrclass_val > 0) { 839b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 840b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 841b87d8dbfSGirish K S pwrclass_val, 84271fe3eb0SSeungwon Jeon card->ext_csd.generic_cmd6_time); 843b87d8dbfSGirish K S } 844b87d8dbfSGirish K S 845b87d8dbfSGirish K S return err; 846b87d8dbfSGirish K S } 847b87d8dbfSGirish K S 8482385049dSSeungwon Jeon static int mmc_select_powerclass(struct mmc_card *card) 8492385049dSSeungwon Jeon { 8502385049dSSeungwon Jeon struct mmc_host *host = card->host; 8512385049dSSeungwon Jeon u32 bus_width, ext_csd_bits; 8522385049dSSeungwon Jeon int err, ddr; 8532385049dSSeungwon Jeon 8542385049dSSeungwon Jeon /* Power class selection is supported for versions >= 4.0 */ 855148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 8562385049dSSeungwon Jeon return 0; 8572385049dSSeungwon Jeon 8582385049dSSeungwon Jeon bus_width = host->ios.bus_width; 8592385049dSSeungwon Jeon /* Power class values are defined only for 4/8 bit bus */ 8602385049dSSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 8612385049dSSeungwon Jeon return 0; 8622385049dSSeungwon Jeon 8632385049dSSeungwon Jeon ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; 8642385049dSSeungwon Jeon if (ddr) 8652385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 8662385049dSSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 8672385049dSSeungwon Jeon else 8682385049dSSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 8692385049dSSeungwon Jeon EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; 8702385049dSSeungwon Jeon 8712385049dSSeungwon Jeon err = __mmc_select_powerclass(card, ext_csd_bits); 8722385049dSSeungwon Jeon if (err) 8732385049dSSeungwon Jeon pr_warn("%s: power class selection to bus width %d ddr %d failed\n", 8742385049dSSeungwon Jeon mmc_hostname(host), 1 << bus_width, ddr); 8752385049dSSeungwon Jeon 8762385049dSSeungwon Jeon return err; 8772385049dSSeungwon Jeon } 8782385049dSSeungwon Jeon 879b87d8dbfSGirish K S /* 880577fb131SSeungwon Jeon * Set the bus speed for the selected speed mode. 881a4924c71SGirish K S */ 882577fb131SSeungwon Jeon static void mmc_set_bus_speed(struct mmc_card *card) 883a4924c71SGirish K S { 884577fb131SSeungwon Jeon unsigned int max_dtr = (unsigned int)-1; 885577fb131SSeungwon Jeon 8860a5b6438SSeungwon Jeon if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && 8870a5b6438SSeungwon Jeon max_dtr > card->ext_csd.hs200_max_dtr) 888577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs200_max_dtr; 889577fb131SSeungwon Jeon else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) 890577fb131SSeungwon Jeon max_dtr = card->ext_csd.hs_max_dtr; 891577fb131SSeungwon Jeon else if (max_dtr > card->csd.max_dtr) 892577fb131SSeungwon Jeon max_dtr = card->csd.max_dtr; 893577fb131SSeungwon Jeon 894577fb131SSeungwon Jeon mmc_set_clock(card->host, max_dtr); 895577fb131SSeungwon Jeon } 896577fb131SSeungwon Jeon 897577fb131SSeungwon Jeon /* 898577fb131SSeungwon Jeon * Select the bus width amoung 4-bit and 8-bit(SDR). 899577fb131SSeungwon Jeon * If the bus width is changed successfully, return the selected width value. 900577fb131SSeungwon Jeon * Zero is returned instead of error value if the wide width is not supported. 901577fb131SSeungwon Jeon */ 902577fb131SSeungwon Jeon static int mmc_select_bus_width(struct mmc_card *card) 903577fb131SSeungwon Jeon { 904a4924c71SGirish K S static unsigned ext_csd_bits[] = { 905a4924c71SGirish K S EXT_CSD_BUS_WIDTH_8, 906577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH_4, 907a4924c71SGirish K S }; 908a4924c71SGirish K S static unsigned bus_widths[] = { 909a4924c71SGirish K S MMC_BUS_WIDTH_8, 910577fb131SSeungwon Jeon MMC_BUS_WIDTH_4, 911a4924c71SGirish K S }; 912577fb131SSeungwon Jeon struct mmc_host *host = card->host; 913577fb131SSeungwon Jeon unsigned idx, bus_width = 0; 914577fb131SSeungwon Jeon int err = 0; 915a4924c71SGirish K S 9161c2d26e3SAlexandre Belloni if (!mmc_can_ext_csd(card) || 917577fb131SSeungwon Jeon !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) 918577fb131SSeungwon Jeon return 0; 919a4924c71SGirish K S 920577fb131SSeungwon Jeon idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; 921a4924c71SGirish K S 922a4924c71SGirish K S /* 923a4924c71SGirish K S * Unlike SD, MMC cards dont have a configuration register to notify 924a4924c71SGirish K S * supported bus width. So bus test command should be run to identify 925a4924c71SGirish K S * the supported bus width or compare the ext csd values of current 926a4924c71SGirish K S * bus width and ext csd values of 1 bit mode read earlier. 927a4924c71SGirish K S */ 928577fb131SSeungwon Jeon for (; idx < ARRAY_SIZE(bus_widths); idx++) { 929a4924c71SGirish K S /* 930a4924c71SGirish K S * Host is capable of 8bit transfer, then switch 931a4924c71SGirish K S * the device to work in 8bit transfer mode. If the 932a4924c71SGirish K S * mmc switch command returns error then switch to 933a4924c71SGirish K S * 4bit transfer mode. On success set the corresponding 934a4924c71SGirish K S * bus width on the host. 935a4924c71SGirish K S */ 936a4924c71SGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 937a4924c71SGirish K S EXT_CSD_BUS_WIDTH, 938a4924c71SGirish K S ext_csd_bits[idx], 939a4924c71SGirish K S card->ext_csd.generic_cmd6_time); 940a4924c71SGirish K S if (err) 941a4924c71SGirish K S continue; 942a4924c71SGirish K S 943577fb131SSeungwon Jeon bus_width = bus_widths[idx]; 944577fb131SSeungwon Jeon mmc_set_bus_width(host, bus_width); 945a4924c71SGirish K S 946577fb131SSeungwon Jeon /* 947577fb131SSeungwon Jeon * If controller can't handle bus width test, 948577fb131SSeungwon Jeon * compare ext_csd previously read in 1 bit mode 949577fb131SSeungwon Jeon * against ext_csd at new bus width 950577fb131SSeungwon Jeon */ 951a4924c71SGirish K S if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 952577fb131SSeungwon Jeon err = mmc_compare_ext_csds(card, bus_width); 953a4924c71SGirish K S else 954577fb131SSeungwon Jeon err = mmc_bus_test(card, bus_width); 955577fb131SSeungwon Jeon 956577fb131SSeungwon Jeon if (!err) { 957577fb131SSeungwon Jeon err = bus_width; 958a4924c71SGirish K S break; 959577fb131SSeungwon Jeon } else { 960577fb131SSeungwon Jeon pr_warn("%s: switch to bus width %d failed\n", 961ed9feec7SWolfram Sang mmc_hostname(host), 1 << bus_width); 962577fb131SSeungwon Jeon } 963a4924c71SGirish K S } 964a4924c71SGirish K S 965577fb131SSeungwon Jeon return err; 966577fb131SSeungwon Jeon } 967577fb131SSeungwon Jeon 968577fb131SSeungwon Jeon /* 969577fb131SSeungwon Jeon * Switch to the high-speed mode 970577fb131SSeungwon Jeon */ 971577fb131SSeungwon Jeon static int mmc_select_hs(struct mmc_card *card) 972577fb131SSeungwon Jeon { 973577fb131SSeungwon Jeon int err; 974577fb131SSeungwon Jeon 9754509f847SUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 976577fb131SSeungwon Jeon EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, 97757de31f6SUlf Hansson card->ext_csd.generic_cmd6_time, 97857de31f6SUlf Hansson true, true, true); 979577fb131SSeungwon Jeon if (!err) 980577fb131SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 981577fb131SSeungwon Jeon 982577fb131SSeungwon Jeon return err; 983577fb131SSeungwon Jeon } 984577fb131SSeungwon Jeon 985577fb131SSeungwon Jeon /* 986577fb131SSeungwon Jeon * Activate wide bus and DDR if supported. 987577fb131SSeungwon Jeon */ 988577fb131SSeungwon Jeon static int mmc_select_hs_ddr(struct mmc_card *card) 989577fb131SSeungwon Jeon { 990577fb131SSeungwon Jeon struct mmc_host *host = card->host; 991577fb131SSeungwon Jeon u32 bus_width, ext_csd_bits; 992577fb131SSeungwon Jeon int err = 0; 993577fb131SSeungwon Jeon 994577fb131SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) 995577fb131SSeungwon Jeon return 0; 996577fb131SSeungwon Jeon 997577fb131SSeungwon Jeon bus_width = host->ios.bus_width; 998577fb131SSeungwon Jeon if (bus_width == MMC_BUS_WIDTH_1) 999577fb131SSeungwon Jeon return 0; 1000577fb131SSeungwon Jeon 1001577fb131SSeungwon Jeon ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? 1002577fb131SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; 1003577fb131SSeungwon Jeon 1004577fb131SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1005577fb131SSeungwon Jeon EXT_CSD_BUS_WIDTH, 1006577fb131SSeungwon Jeon ext_csd_bits, 1007577fb131SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1008577fb131SSeungwon Jeon if (err) { 10094b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width %d ddr failed\n", 1010577fb131SSeungwon Jeon mmc_hostname(host), 1 << bus_width); 1011577fb131SSeungwon Jeon return err; 1012577fb131SSeungwon Jeon } 1013577fb131SSeungwon Jeon 1014577fb131SSeungwon Jeon /* 1015577fb131SSeungwon Jeon * eMMC cards can support 3.3V to 1.2V i/o (vccq) 1016577fb131SSeungwon Jeon * signaling. 1017577fb131SSeungwon Jeon * 1018577fb131SSeungwon Jeon * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 1019577fb131SSeungwon Jeon * 1020577fb131SSeungwon Jeon * 1.8V vccq at 3.3V core voltage (vcc) is not required 1021577fb131SSeungwon Jeon * in the JEDEC spec for DDR. 1022577fb131SSeungwon Jeon * 1023312449efSChuanxiao.Dong * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all 1024312449efSChuanxiao.Dong * host controller can support this, like some of the SDHCI 1025312449efSChuanxiao.Dong * controller which connect to an eMMC device. Some of these 1026312449efSChuanxiao.Dong * host controller still needs to use 1.8v vccq for supporting 1027312449efSChuanxiao.Dong * DDR mode. 1028312449efSChuanxiao.Dong * 1029312449efSChuanxiao.Dong * So the sequence will be: 1030312449efSChuanxiao.Dong * if (host and device can both support 1.2v IO) 1031312449efSChuanxiao.Dong * use 1.2v IO; 1032312449efSChuanxiao.Dong * else if (host and device can both support 1.8v IO) 1033312449efSChuanxiao.Dong * use 1.8v IO; 1034312449efSChuanxiao.Dong * so if host and device can only support 3.3v IO, this is the 1035312449efSChuanxiao.Dong * last choice. 1036577fb131SSeungwon Jeon * 1037577fb131SSeungwon Jeon * WARNING: eMMC rules are NOT the same as SD DDR 1038577fb131SSeungwon Jeon */ 1039312449efSChuanxiao.Dong err = -EINVAL; 1040312449efSChuanxiao.Dong if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 1041312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1042577fb131SSeungwon Jeon 1043312449efSChuanxiao.Dong if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V)) 1044312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1045312449efSChuanxiao.Dong 1046312449efSChuanxiao.Dong /* make sure vccq is 3.3v after switching disaster */ 1047312449efSChuanxiao.Dong if (err) 1048312449efSChuanxiao.Dong err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1049312449efSChuanxiao.Dong 1050312449efSChuanxiao.Dong if (!err) 1051577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 1052577fb131SSeungwon Jeon 1053577fb131SSeungwon Jeon return err; 1054577fb131SSeungwon Jeon } 1055577fb131SSeungwon Jeon 1056974007aaSAdrian Hunter /* Caller must hold re-tuning */ 1057974007aaSAdrian Hunter static int mmc_switch_status(struct mmc_card *card) 1058974007aaSAdrian Hunter { 1059974007aaSAdrian Hunter u32 status; 1060974007aaSAdrian Hunter int err; 1061974007aaSAdrian Hunter 1062974007aaSAdrian Hunter err = mmc_send_status(card, &status); 1063974007aaSAdrian Hunter if (err) 1064974007aaSAdrian Hunter return err; 1065974007aaSAdrian Hunter 1066974007aaSAdrian Hunter return mmc_switch_status_error(card->host, status); 1067974007aaSAdrian Hunter } 1068974007aaSAdrian Hunter 10690a5b6438SSeungwon Jeon static int mmc_select_hs400(struct mmc_card *card) 10700a5b6438SSeungwon Jeon { 10710a5b6438SSeungwon Jeon struct mmc_host *host = card->host; 1072d2302933SAdrian Hunter bool send_status = true; 107351b12f77SAdrian Hunter unsigned int max_dtr; 10740a5b6438SSeungwon Jeon int err = 0; 1075cc4f414cSAdrian Hunter u8 val; 10760a5b6438SSeungwon Jeon 10770a5b6438SSeungwon Jeon /* 10780a5b6438SSeungwon Jeon * HS400 mode requires 8-bit bus width 10790a5b6438SSeungwon Jeon */ 10800a5b6438SSeungwon Jeon if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 10810a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8)) 10820a5b6438SSeungwon Jeon return 0; 10830a5b6438SSeungwon Jeon 1084d2302933SAdrian Hunter if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) 1085d2302933SAdrian Hunter send_status = false; 1086d2302933SAdrian Hunter 108751b12f77SAdrian Hunter /* Reduce frequency to HS frequency */ 108851b12f77SAdrian Hunter max_dtr = card->ext_csd.hs_max_dtr; 108951b12f77SAdrian Hunter mmc_set_clock(host, max_dtr); 10900a5b6438SSeungwon Jeon 109151b12f77SAdrian Hunter /* Switch card to HS mode */ 1092adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 10930a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1094cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 10950a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time, 1096d2302933SAdrian Hunter true, send_status, true); 10970a5b6438SSeungwon Jeon if (err) { 10984b75bffcSAndrew Gabbasov pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", 10990a5b6438SSeungwon Jeon mmc_hostname(host), err); 11000a5b6438SSeungwon Jeon return err; 11010a5b6438SSeungwon Jeon } 11020a5b6438SSeungwon Jeon 110351b12f77SAdrian Hunter /* Set host controller to HS timing */ 110451b12f77SAdrian Hunter mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 110551b12f77SAdrian Hunter 1106d2302933SAdrian Hunter if (!send_status) { 1107d2302933SAdrian Hunter err = mmc_switch_status(card); 1108d2302933SAdrian Hunter if (err) 1109d2302933SAdrian Hunter goto out_err; 1110d2302933SAdrian Hunter } 1111d2302933SAdrian Hunter 1112d2302933SAdrian Hunter /* Switch card to DDR */ 11130a5b6438SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 11140a5b6438SSeungwon Jeon EXT_CSD_BUS_WIDTH, 11150a5b6438SSeungwon Jeon EXT_CSD_DDR_BUS_WIDTH_8, 11160a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time); 11170a5b6438SSeungwon Jeon if (err) { 11184b75bffcSAndrew Gabbasov pr_err("%s: switch to bus width for hs400 failed, err:%d\n", 11190a5b6438SSeungwon Jeon mmc_hostname(host), err); 11200a5b6438SSeungwon Jeon return err; 11210a5b6438SSeungwon Jeon } 11220a5b6438SSeungwon Jeon 1123d2302933SAdrian Hunter /* Switch card to HS400 */ 1124cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS400 | 1125cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 11260a5b6438SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1127cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 11280a5b6438SSeungwon Jeon card->ext_csd.generic_cmd6_time, 1129d2302933SAdrian Hunter true, send_status, true); 11300a5b6438SSeungwon Jeon if (err) { 11314b75bffcSAndrew Gabbasov pr_err("%s: switch to hs400 failed, err:%d\n", 11320a5b6438SSeungwon Jeon mmc_hostname(host), err); 11330a5b6438SSeungwon Jeon return err; 11340a5b6438SSeungwon Jeon } 11350a5b6438SSeungwon Jeon 1136d2302933SAdrian Hunter /* Set host controller to HS400 timing and frequency */ 11370a5b6438SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS400); 11380a5b6438SSeungwon Jeon mmc_set_bus_speed(card); 11390a5b6438SSeungwon Jeon 1140d2302933SAdrian Hunter if (!send_status) { 1141d2302933SAdrian Hunter err = mmc_switch_status(card); 1142d2302933SAdrian Hunter if (err) 1143d2302933SAdrian Hunter goto out_err; 1144d2302933SAdrian Hunter } 1145d2302933SAdrian Hunter 11460a5b6438SSeungwon Jeon return 0; 1147d2302933SAdrian Hunter 1148d2302933SAdrian Hunter out_err: 1149d2302933SAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 1150d2302933SAdrian Hunter __func__, err); 1151d2302933SAdrian Hunter return err; 11520a5b6438SSeungwon Jeon } 11530a5b6438SSeungwon Jeon 11546376f69dSAdrian Hunter int mmc_hs200_to_hs400(struct mmc_card *card) 11556376f69dSAdrian Hunter { 11566376f69dSAdrian Hunter return mmc_select_hs400(card); 11576376f69dSAdrian Hunter } 11586376f69dSAdrian Hunter 11596376f69dSAdrian Hunter int mmc_hs400_to_hs200(struct mmc_card *card) 11606376f69dSAdrian Hunter { 11616376f69dSAdrian Hunter struct mmc_host *host = card->host; 11626376f69dSAdrian Hunter bool send_status = true; 11636376f69dSAdrian Hunter unsigned int max_dtr; 11646376f69dSAdrian Hunter int err; 1165cc4f414cSAdrian Hunter u8 val; 11666376f69dSAdrian Hunter 11676376f69dSAdrian Hunter if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) 11686376f69dSAdrian Hunter send_status = false; 11696376f69dSAdrian Hunter 11706376f69dSAdrian Hunter /* Reduce frequency to HS */ 11716376f69dSAdrian Hunter max_dtr = card->ext_csd.hs_max_dtr; 11726376f69dSAdrian Hunter mmc_set_clock(host, max_dtr); 11736376f69dSAdrian Hunter 11746376f69dSAdrian Hunter /* Switch HS400 to HS DDR */ 1175adb24d42SWenkai Du val = EXT_CSD_TIMING_HS; 11766376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1177cc4f414cSAdrian Hunter val, card->ext_csd.generic_cmd6_time, 11786376f69dSAdrian Hunter true, send_status, true); 11796376f69dSAdrian Hunter if (err) 11806376f69dSAdrian Hunter goto out_err; 11816376f69dSAdrian Hunter 11826376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_DDR52); 11836376f69dSAdrian Hunter 11846376f69dSAdrian Hunter if (!send_status) { 11856376f69dSAdrian Hunter err = mmc_switch_status(card); 11866376f69dSAdrian Hunter if (err) 11876376f69dSAdrian Hunter goto out_err; 11886376f69dSAdrian Hunter } 11896376f69dSAdrian Hunter 11906376f69dSAdrian Hunter /* Switch HS DDR to HS */ 11916376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, 11926376f69dSAdrian Hunter EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, 11936376f69dSAdrian Hunter true, send_status, true); 11946376f69dSAdrian Hunter if (err) 11956376f69dSAdrian Hunter goto out_err; 11966376f69dSAdrian Hunter 11976376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS); 11986376f69dSAdrian Hunter 11996376f69dSAdrian Hunter if (!send_status) { 12006376f69dSAdrian Hunter err = mmc_switch_status(card); 12016376f69dSAdrian Hunter if (err) 12026376f69dSAdrian Hunter goto out_err; 12036376f69dSAdrian Hunter } 12046376f69dSAdrian Hunter 12056376f69dSAdrian Hunter /* Switch HS to HS200 */ 1206cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1207cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 12086376f69dSAdrian Hunter err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1209cc4f414cSAdrian Hunter val, card->ext_csd.generic_cmd6_time, true, 1210cc4f414cSAdrian Hunter send_status, true); 12116376f69dSAdrian Hunter if (err) 12126376f69dSAdrian Hunter goto out_err; 12136376f69dSAdrian Hunter 12146376f69dSAdrian Hunter mmc_set_timing(host, MMC_TIMING_MMC_HS200); 12156376f69dSAdrian Hunter 12166376f69dSAdrian Hunter if (!send_status) { 12176376f69dSAdrian Hunter err = mmc_switch_status(card); 12186376f69dSAdrian Hunter if (err) 12196376f69dSAdrian Hunter goto out_err; 12206376f69dSAdrian Hunter } 12216376f69dSAdrian Hunter 12226376f69dSAdrian Hunter mmc_set_bus_speed(card); 12236376f69dSAdrian Hunter 12246376f69dSAdrian Hunter return 0; 12256376f69dSAdrian Hunter 12266376f69dSAdrian Hunter out_err: 12276376f69dSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 12286376f69dSAdrian Hunter __func__, err); 12296376f69dSAdrian Hunter return err; 12306376f69dSAdrian Hunter } 12316376f69dSAdrian Hunter 123281ac2af6SShawn Lin static int mmc_select_hs400es(struct mmc_card *card) 123381ac2af6SShawn Lin { 123481ac2af6SShawn Lin struct mmc_host *host = card->host; 123581ac2af6SShawn Lin int err = 0; 123681ac2af6SShawn Lin u8 val; 123781ac2af6SShawn Lin 123881ac2af6SShawn Lin if (!(host->caps & MMC_CAP_8_BIT_DATA)) { 123981ac2af6SShawn Lin err = -ENOTSUPP; 124081ac2af6SShawn Lin goto out_err; 124181ac2af6SShawn Lin } 124281ac2af6SShawn Lin 124381ac2af6SShawn Lin err = mmc_select_bus_width(card); 124481ac2af6SShawn Lin if (err < 0) 124581ac2af6SShawn Lin goto out_err; 124681ac2af6SShawn Lin 124781ac2af6SShawn Lin /* Switch card to HS mode */ 124881ac2af6SShawn Lin err = mmc_select_hs(card); 124981ac2af6SShawn Lin if (err) { 125081ac2af6SShawn Lin pr_err("%s: switch to high-speed failed, err:%d\n", 125181ac2af6SShawn Lin mmc_hostname(host), err); 125281ac2af6SShawn Lin goto out_err; 125381ac2af6SShawn Lin } 125481ac2af6SShawn Lin 125581ac2af6SShawn Lin err = mmc_switch_status(card); 125681ac2af6SShawn Lin if (err) 125781ac2af6SShawn Lin goto out_err; 125881ac2af6SShawn Lin 125981ac2af6SShawn Lin /* Switch card to DDR with strobe bit */ 126081ac2af6SShawn Lin val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; 126181ac2af6SShawn Lin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 126281ac2af6SShawn Lin EXT_CSD_BUS_WIDTH, 126381ac2af6SShawn Lin val, 126481ac2af6SShawn Lin card->ext_csd.generic_cmd6_time); 126581ac2af6SShawn Lin if (err) { 126681ac2af6SShawn Lin pr_err("%s: switch to bus width for hs400es failed, err:%d\n", 126781ac2af6SShawn Lin mmc_hostname(host), err); 126881ac2af6SShawn Lin goto out_err; 126981ac2af6SShawn Lin } 127081ac2af6SShawn Lin 127181ac2af6SShawn Lin /* Switch card to HS400 */ 127281ac2af6SShawn Lin val = EXT_CSD_TIMING_HS400 | 127381ac2af6SShawn Lin card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 127481ac2af6SShawn Lin err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 127581ac2af6SShawn Lin EXT_CSD_HS_TIMING, val, 127681ac2af6SShawn Lin card->ext_csd.generic_cmd6_time, 127781ac2af6SShawn Lin true, false, true); 127881ac2af6SShawn Lin if (err) { 127981ac2af6SShawn Lin pr_err("%s: switch to hs400es failed, err:%d\n", 128081ac2af6SShawn Lin mmc_hostname(host), err); 128181ac2af6SShawn Lin goto out_err; 128281ac2af6SShawn Lin } 128381ac2af6SShawn Lin 128481ac2af6SShawn Lin /* Set host controller to HS400 timing and frequency */ 128581ac2af6SShawn Lin mmc_set_timing(host, MMC_TIMING_MMC_HS400); 128681ac2af6SShawn Lin 128781ac2af6SShawn Lin /* Controller enable enhanced strobe function */ 128881ac2af6SShawn Lin host->ios.enhanced_strobe = true; 128981ac2af6SShawn Lin if (host->ops->hs400_enhanced_strobe) 129081ac2af6SShawn Lin host->ops->hs400_enhanced_strobe(host, &host->ios); 129181ac2af6SShawn Lin 129281ac2af6SShawn Lin err = mmc_switch_status(card); 129381ac2af6SShawn Lin if (err) 129481ac2af6SShawn Lin goto out_err; 129581ac2af6SShawn Lin 129681ac2af6SShawn Lin return 0; 129781ac2af6SShawn Lin 129881ac2af6SShawn Lin out_err: 129981ac2af6SShawn Lin pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 130081ac2af6SShawn Lin __func__, err); 130181ac2af6SShawn Lin return err; 130281ac2af6SShawn Lin } 130381ac2af6SShawn Lin 1304cc4f414cSAdrian Hunter static void mmc_select_driver_type(struct mmc_card *card) 1305cc4f414cSAdrian Hunter { 1306cc4f414cSAdrian Hunter int card_drv_type, drive_strength, drv_type; 1307cc4f414cSAdrian Hunter 1308cc4f414cSAdrian Hunter card_drv_type = card->ext_csd.raw_driver_strength | 1309cc4f414cSAdrian Hunter mmc_driver_type_mask(0); 1310cc4f414cSAdrian Hunter 1311cc4f414cSAdrian Hunter drive_strength = mmc_select_drive_strength(card, 1312cc4f414cSAdrian Hunter card->ext_csd.hs200_max_dtr, 1313cc4f414cSAdrian Hunter card_drv_type, &drv_type); 1314cc4f414cSAdrian Hunter 1315cc4f414cSAdrian Hunter card->drive_strength = drive_strength; 1316cc4f414cSAdrian Hunter 1317cc4f414cSAdrian Hunter if (drv_type) 1318cc4f414cSAdrian Hunter mmc_set_driver_type(card->host, drv_type); 1319cc4f414cSAdrian Hunter } 1320cc4f414cSAdrian Hunter 1321577fb131SSeungwon Jeon /* 1322577fb131SSeungwon Jeon * For device supporting HS200 mode, the following sequence 1323577fb131SSeungwon Jeon * should be done before executing the tuning process. 1324577fb131SSeungwon Jeon * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) 1325577fb131SSeungwon Jeon * 2. switch to HS200 mode 1326577fb131SSeungwon Jeon * 3. set the clock to > 52Mhz and <=200MHz 1327577fb131SSeungwon Jeon */ 1328577fb131SSeungwon Jeon static int mmc_select_hs200(struct mmc_card *card) 1329577fb131SSeungwon Jeon { 1330577fb131SSeungwon Jeon struct mmc_host *host = card->host; 13311815e61bSAdrian Hunter bool send_status = true; 1332e51534c8SDong Aisheng unsigned int old_timing, old_signal_voltage; 1333577fb131SSeungwon Jeon int err = -EINVAL; 1334cc4f414cSAdrian Hunter u8 val; 1335577fb131SSeungwon Jeon 1336e51534c8SDong Aisheng old_signal_voltage = host->ios.signal_voltage; 1337577fb131SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) 1338577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); 1339577fb131SSeungwon Jeon 1340577fb131SSeungwon Jeon if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) 1341577fb131SSeungwon Jeon err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 1342577fb131SSeungwon Jeon 1343577fb131SSeungwon Jeon /* If fails try again during next card power cycle */ 1344577fb131SSeungwon Jeon if (err) 1345e51534c8SDong Aisheng return err; 1346577fb131SSeungwon Jeon 1347cc4f414cSAdrian Hunter mmc_select_driver_type(card); 1348cc4f414cSAdrian Hunter 13491815e61bSAdrian Hunter if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) 13501815e61bSAdrian Hunter send_status = false; 13511815e61bSAdrian Hunter 1352577fb131SSeungwon Jeon /* 1353577fb131SSeungwon Jeon * Set the bus width(4 or 8) with host's support and 1354577fb131SSeungwon Jeon * switch to HS200 mode if bus width is set successfully. 1355577fb131SSeungwon Jeon */ 1356577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 1357f7414943SChen-Yu Tsai if (err >= 0) { 1358cc4f414cSAdrian Hunter val = EXT_CSD_TIMING_HS200 | 1359cc4f414cSAdrian Hunter card->drive_strength << EXT_CSD_DRV_STR_SHIFT; 1360577fb131SSeungwon Jeon err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1361cc4f414cSAdrian Hunter EXT_CSD_HS_TIMING, val, 1362577fb131SSeungwon Jeon card->ext_csd.generic_cmd6_time, 13631815e61bSAdrian Hunter true, send_status, true); 13641815e61bSAdrian Hunter if (err) 13651815e61bSAdrian Hunter goto err; 13661815e61bSAdrian Hunter old_timing = host->ios.timing; 1367577fb131SSeungwon Jeon mmc_set_timing(host, MMC_TIMING_MMC_HS200); 13681815e61bSAdrian Hunter if (!send_status) { 13691815e61bSAdrian Hunter err = mmc_switch_status(card); 13701815e61bSAdrian Hunter /* 13711815e61bSAdrian Hunter * mmc_select_timing() assumes timing has not changed if 13721815e61bSAdrian Hunter * it is a switch error. 13731815e61bSAdrian Hunter */ 13741815e61bSAdrian Hunter if (err == -EBADMSG) 13751815e61bSAdrian Hunter mmc_set_timing(host, old_timing); 13761815e61bSAdrian Hunter } 1377577fb131SSeungwon Jeon } 1378a4924c71SGirish K S err: 1379e51534c8SDong Aisheng if (err) { 1380e51534c8SDong Aisheng /* fall back to the old signal voltage, if fails report error */ 1381e51534c8SDong Aisheng if (__mmc_set_signal_voltage(host, old_signal_voltage)) 1382e51534c8SDong Aisheng err = -EIO; 1383e51534c8SDong Aisheng 13841815e61bSAdrian Hunter pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), 13851815e61bSAdrian Hunter __func__, err); 1386e51534c8SDong Aisheng } 1387a4924c71SGirish K S return err; 1388a4924c71SGirish K S } 1389a4924c71SGirish K S 1390a4924c71SGirish K S /* 139181ac2af6SShawn Lin * Activate High Speed, HS200 or HS400ES mode if supported. 1392577fb131SSeungwon Jeon */ 1393577fb131SSeungwon Jeon static int mmc_select_timing(struct mmc_card *card) 1394577fb131SSeungwon Jeon { 1395577fb131SSeungwon Jeon int err = 0; 1396577fb131SSeungwon Jeon 1397148bcab2SUlf Hansson if (!mmc_can_ext_csd(card)) 1398577fb131SSeungwon Jeon goto bus_speed; 1399577fb131SSeungwon Jeon 140081ac2af6SShawn Lin if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) 140181ac2af6SShawn Lin err = mmc_select_hs400es(card); 140281ac2af6SShawn Lin else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) 1403577fb131SSeungwon Jeon err = mmc_select_hs200(card); 1404577fb131SSeungwon Jeon else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) 1405577fb131SSeungwon Jeon err = mmc_select_hs(card); 1406577fb131SSeungwon Jeon 1407577fb131SSeungwon Jeon if (err && err != -EBADMSG) 1408577fb131SSeungwon Jeon return err; 1409577fb131SSeungwon Jeon 1410577fb131SSeungwon Jeon bus_speed: 1411577fb131SSeungwon Jeon /* 1412577fb131SSeungwon Jeon * Set the bus speed to the selected bus timing. 1413577fb131SSeungwon Jeon * If timing is not selected, backward compatible is the default. 1414577fb131SSeungwon Jeon */ 1415577fb131SSeungwon Jeon mmc_set_bus_speed(card); 14160400ed0aSDong Aisheng return 0; 1417577fb131SSeungwon Jeon } 1418577fb131SSeungwon Jeon 1419577fb131SSeungwon Jeon /* 1420577fb131SSeungwon Jeon * Execute tuning sequence to seek the proper bus operating 14210a5b6438SSeungwon Jeon * conditions for HS200 and HS400, which sends CMD21 to the device. 1422577fb131SSeungwon Jeon */ 1423577fb131SSeungwon Jeon static int mmc_hs200_tuning(struct mmc_card *card) 1424577fb131SSeungwon Jeon { 1425577fb131SSeungwon Jeon struct mmc_host *host = card->host; 1426577fb131SSeungwon Jeon 14270a5b6438SSeungwon Jeon /* 14280a5b6438SSeungwon Jeon * Timing should be adjusted to the HS400 target 14290a5b6438SSeungwon Jeon * operation frequency for tuning process 14300a5b6438SSeungwon Jeon */ 14310a5b6438SSeungwon Jeon if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && 14320a5b6438SSeungwon Jeon host->ios.bus_width == MMC_BUS_WIDTH_8) 14330a5b6438SSeungwon Jeon if (host->ops->prepare_hs400_tuning) 14340a5b6438SSeungwon Jeon host->ops->prepare_hs400_tuning(host, &host->ios); 14350a5b6438SSeungwon Jeon 143663e415c6SAdrian Hunter return mmc_execute_tuning(card); 1437577fb131SSeungwon Jeon } 1438577fb131SSeungwon Jeon 1439577fb131SSeungwon Jeon /* 14406abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 14416abaa0c9SPierre Ossman * 14428769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 14436abaa0c9SPierre Ossman * we're trying to reinitialise. 14447ea239d9SPierre Ossman */ 14458c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 14466abaa0c9SPierre Ossman struct mmc_card *oldcard) 14477ea239d9SPierre Ossman { 14487ea239d9SPierre Ossman struct mmc_card *card; 1449577fb131SSeungwon Jeon int err; 14507ea239d9SPierre Ossman u32 cid[4]; 1451b676f039SPhilip Rakity u32 rocr; 14527ea239d9SPierre Ossman 14537ea239d9SPierre Ossman BUG_ON(!host); 1454d84075c8SPierre Ossman WARN_ON(!host->claimed); 14557ea239d9SPierre Ossman 145644669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 145744669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 145844669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 145944669034SStefan Nilsson XK 14607ea239d9SPierre Ossman /* 14617ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 14627ea239d9SPierre Ossman * need to tell some cards to go back to the idle 14637ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 14647ea239d9SPierre Ossman * respond. 1465c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 14667ea239d9SPierre Ossman */ 14677ea239d9SPierre Ossman mmc_go_idle(host); 14687ea239d9SPierre Ossman 14697ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 1470b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 147117b0429dSPierre Ossman if (err) 14726abaa0c9SPierre Ossman goto err; 14737ea239d9SPierre Ossman 14747ea239d9SPierre Ossman /* 1475af517150SDavid Brownell * For SPI, enable CRC as appropriate. 1476af517150SDavid Brownell */ 1477af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1478af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 1479af517150SDavid Brownell if (err) 1480af517150SDavid Brownell goto err; 1481af517150SDavid Brownell } 1482af517150SDavid Brownell 1483af517150SDavid Brownell /* 14847ea239d9SPierre Ossman * Fetch CID from card. 14857ea239d9SPierre Ossman */ 1486af517150SDavid Brownell if (mmc_host_is_spi(host)) 1487af517150SDavid Brownell err = mmc_send_cid(host, cid); 1488af517150SDavid Brownell else 14897ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 149017b0429dSPierre Ossman if (err) 14917ea239d9SPierre Ossman goto err; 14927ea239d9SPierre Ossman 14936abaa0c9SPierre Ossman if (oldcard) { 1494adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1495adf66a0dSPierre Ossman err = -ENOENT; 14966abaa0c9SPierre Ossman goto err; 1497adf66a0dSPierre Ossman } 14986abaa0c9SPierre Ossman 14996abaa0c9SPierre Ossman card = oldcard; 15006abaa0c9SPierre Ossman } else { 15017ea239d9SPierre Ossman /* 15027ea239d9SPierre Ossman * Allocate card structure. 15037ea239d9SPierre Ossman */ 150451ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 1505adf66a0dSPierre Ossman if (IS_ERR(card)) { 1506adf66a0dSPierre Ossman err = PTR_ERR(card); 15077ea239d9SPierre Ossman goto err; 1508adf66a0dSPierre Ossman } 15097ea239d9SPierre Ossman 151069041150SUlf Hansson card->ocr = ocr; 15117ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 15127ea239d9SPierre Ossman card->rca = 1; 15137ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 15146abaa0c9SPierre Ossman } 15157ea239d9SPierre Ossman 15167ea239d9SPierre Ossman /* 1517eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 1518eac86321SDoug Anderson */ 1519eac86321SDoug Anderson if (host->ops->init_card) 1520eac86321SDoug Anderson host->ops->init_card(host, card); 1521eac86321SDoug Anderson 1522eac86321SDoug Anderson /* 1523af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 15247ea239d9SPierre Ossman */ 1525af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15267ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 152717b0429dSPierre Ossman if (err) 15287ea239d9SPierre Ossman goto free_card; 15297ea239d9SPierre Ossman 15307ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 1531af517150SDavid Brownell } 15327ea239d9SPierre Ossman 15336abaa0c9SPierre Ossman if (!oldcard) { 15347ea239d9SPierre Ossman /* 15357ea239d9SPierre Ossman * Fetch CSD from card. 15367ea239d9SPierre Ossman */ 15377ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 153817b0429dSPierre Ossman if (err) 15397ea239d9SPierre Ossman goto free_card; 15407ea239d9SPierre Ossman 1541bd766312SPierre Ossman err = mmc_decode_csd(card); 1542adf66a0dSPierre Ossman if (err) 1543bd766312SPierre Ossman goto free_card; 1544bd766312SPierre Ossman err = mmc_decode_cid(card); 1545adf66a0dSPierre Ossman if (err) 1546bd766312SPierre Ossman goto free_card; 15476abaa0c9SPierre Ossman } 15487ea239d9SPierre Ossman 15497ea239d9SPierre Ossman /* 15503d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 15513d705d14SSascha Hauer * DSR configuration 15523d705d14SSascha Hauer */ 15533d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 15543d705d14SSascha Hauer mmc_set_dsr(host); 15553d705d14SSascha Hauer 15563d705d14SSascha Hauer /* 155789a73cf5SPierre Ossman * Select card, as all following commands rely on that. 15587ea239d9SPierre Ossman */ 1559af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 15607ea239d9SPierre Ossman err = mmc_select_card(card); 156117b0429dSPierre Ossman if (err) 15627ea239d9SPierre Ossman goto free_card; 1563af517150SDavid Brownell } 15647ea239d9SPierre Ossman 15656abaa0c9SPierre Ossman if (!oldcard) { 1566076ec38aSUlf Hansson /* Read extended CSD. */ 1567076ec38aSUlf Hansson err = mmc_read_ext_csd(card); 156817b0429dSPierre Ossman if (err) 15697ea239d9SPierre Ossman goto free_card; 1570b676f039SPhilip Rakity 157187e88659SMasahiro Yamada /* 157287e88659SMasahiro Yamada * If doing byte addressing, check if required to do sector 1573b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 1574b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 1575b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 1576b676f039SPhilip Rakity */ 157787e88659SMasahiro Yamada if (rocr & BIT(30)) 1578b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 1579b676f039SPhilip Rakity 1580dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 1581dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 15826abaa0c9SPierre Ossman } 15837ea239d9SPierre Ossman 15847ea239d9SPierre Ossman /* 1585709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 1586709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 1587709de99dSChuanxiao Dong */ 158869803d4fSGrégory Soutadé if (card->ext_csd.partition_setting_completed || 158983bb24aaSAdrian Hunter (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { 1590709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1591b23cf0bdSSeungwon Jeon EXT_CSD_ERASE_GROUP_DEF, 1, 1592b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1593709de99dSChuanxiao Dong 1594709de99dSChuanxiao Dong if (err && err != -EBADMSG) 1595709de99dSChuanxiao Dong goto free_card; 1596709de99dSChuanxiao Dong 1597709de99dSChuanxiao Dong if (err) { 1598709de99dSChuanxiao Dong err = 0; 1599709de99dSChuanxiao Dong /* 1600709de99dSChuanxiao Dong * Just disable enhanced area off & sz 1601709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 1602709de99dSChuanxiao Dong * during next time reinit 1603709de99dSChuanxiao Dong */ 1604709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 1605709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 1606709de99dSChuanxiao Dong } else { 1607709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 1608709de99dSChuanxiao Dong /* 1609709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 1610709de99dSChuanxiao Dong * This will affect the erase size, so 1611709de99dSChuanxiao Dong * here need to reset erase size 1612709de99dSChuanxiao Dong */ 1613709de99dSChuanxiao Dong mmc_set_erase_size(card); 1614709de99dSChuanxiao Dong } 1615709de99dSChuanxiao Dong } 1616709de99dSChuanxiao Dong 1617709de99dSChuanxiao Dong /* 161841e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 161941e2a489SPhilip Rakity */ 1620371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 1621371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 1622371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 1623371a689fSAndrei Warkentin card->ext_csd.part_config, 1624371a689fSAndrei Warkentin card->ext_csd.part_time); 1625371a689fSAndrei Warkentin if (err && err != -EBADMSG) 1626371a689fSAndrei Warkentin goto free_card; 162741e2a489SPhilip Rakity } 162841e2a489SPhilip Rakity 162941e2a489SPhilip Rakity /* 163043235679SUlf Hansson * Enable power_off_notification byte in the ext_csd register 1631bec8726aSGirish K S */ 163243235679SUlf Hansson if (card->ext_csd.rev >= 6) { 1633bec8726aSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1634bec8726aSGirish K S EXT_CSD_POWER_OFF_NOTIFICATION, 1635bec8726aSGirish K S EXT_CSD_POWER_ON, 1636bec8726aSGirish K S card->ext_csd.generic_cmd6_time); 1637bec8726aSGirish K S if (err && err != -EBADMSG) 1638bec8726aSGirish K S goto free_card; 1639bec8726aSGirish K S 164096a85d54SGirish K S /* 164196a85d54SGirish K S * The err can be -EBADMSG or 0, 164296a85d54SGirish K S * so check for success and update the flag 164396a85d54SGirish K S */ 1644bec8726aSGirish K S if (!err) 1645e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; 164696a85d54SGirish K S } 1647bec8726aSGirish K S 1648bec8726aSGirish K S /* 1649577fb131SSeungwon Jeon * Select timing interface 165089a73cf5SPierre Ossman */ 1651577fb131SSeungwon Jeon err = mmc_select_timing(card); 1652577fb131SSeungwon Jeon if (err) 165389a73cf5SPierre Ossman goto free_card; 165489a73cf5SPierre Ossman 1655a4924c71SGirish K S if (mmc_card_hs200(card)) { 1656577fb131SSeungwon Jeon err = mmc_hs200_tuning(card); 16574c4cb171SPhilip Rakity if (err) 16584b75bffcSAndrew Gabbasov goto free_card; 16590a5b6438SSeungwon Jeon 16600a5b6438SSeungwon Jeon err = mmc_select_hs400(card); 16610a5b6438SSeungwon Jeon if (err) 16624b75bffcSAndrew Gabbasov goto free_card; 1663577fb131SSeungwon Jeon } else if (mmc_card_hs(card)) { 1664577fb131SSeungwon Jeon /* Select the desired bus width optionally */ 1665577fb131SSeungwon Jeon err = mmc_select_bus_width(card); 1666f7414943SChen-Yu Tsai if (err >= 0) { 1667577fb131SSeungwon Jeon err = mmc_select_hs_ddr(card); 1668577fb131SSeungwon Jeon if (err) 16694b75bffcSAndrew Gabbasov goto free_card; 167089a73cf5SPierre Ossman } 1671ef0b27d4SAdrian Hunter } 167289a73cf5SPierre Ossman 1673881d1c25SSeungwon Jeon /* 16742385049dSSeungwon Jeon * Choose the power class with selected bus interface 16752385049dSSeungwon Jeon */ 16762385049dSSeungwon Jeon mmc_select_powerclass(card); 16772385049dSSeungwon Jeon 16782385049dSSeungwon Jeon /* 167952d0974eSSubhash Jadavani * Enable HPI feature (if supported) 168052d0974eSSubhash Jadavani */ 168152d0974eSSubhash Jadavani if (card->ext_csd.hpi) { 168252d0974eSSubhash Jadavani err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 168352d0974eSSubhash Jadavani EXT_CSD_HPI_MGMT, 1, 168452d0974eSSubhash Jadavani card->ext_csd.generic_cmd6_time); 168552d0974eSSubhash Jadavani if (err && err != -EBADMSG) 168652d0974eSSubhash Jadavani goto free_card; 168752d0974eSSubhash Jadavani if (err) { 16886606110dSJoe Perches pr_warn("%s: Enabling HPI failed\n", 168952d0974eSSubhash Jadavani mmc_hostname(card->host)); 169052d0974eSSubhash Jadavani err = 0; 169152d0974eSSubhash Jadavani } else 169252d0974eSSubhash Jadavani card->ext_csd.hpi_en = 1; 169352d0974eSSubhash Jadavani } 169452d0974eSSubhash Jadavani 169552d0974eSSubhash Jadavani /* 1696881d1c25SSeungwon Jeon * If cache size is higher than 0, this indicates 1697881d1c25SSeungwon Jeon * the existence of cache and it can be turned on. 1698881d1c25SSeungwon Jeon */ 16997536d3f8SUlf Hansson if (card->ext_csd.cache_size > 0) { 1700881d1c25SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 17018bc0678bSSeungwon Jeon EXT_CSD_CACHE_CTRL, 1, 17028bc0678bSSeungwon Jeon card->ext_csd.generic_cmd6_time); 1703881d1c25SSeungwon Jeon if (err && err != -EBADMSG) 1704881d1c25SSeungwon Jeon goto free_card; 1705881d1c25SSeungwon Jeon 1706881d1c25SSeungwon Jeon /* 1707881d1c25SSeungwon Jeon * Only if no error, cache is turned on successfully. 1708881d1c25SSeungwon Jeon */ 17098bc0678bSSeungwon Jeon if (err) { 17106606110dSJoe Perches pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", 17118bc0678bSSeungwon Jeon mmc_hostname(card->host), err); 17128bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 0; 17138bc0678bSSeungwon Jeon err = 0; 17148bc0678bSSeungwon Jeon } else { 17158bc0678bSSeungwon Jeon card->ext_csd.cache_ctrl = 1; 17168bc0678bSSeungwon Jeon } 1717881d1c25SSeungwon Jeon } 1718881d1c25SSeungwon Jeon 1719abd9ac14SSeungwon Jeon /* 1720abd9ac14SSeungwon Jeon * The mandatory minimum values are defined for packed command. 1721abd9ac14SSeungwon Jeon * read: 5, write: 3 1722abd9ac14SSeungwon Jeon */ 1723abd9ac14SSeungwon Jeon if (card->ext_csd.max_packed_writes >= 3 && 1724abd9ac14SSeungwon Jeon card->ext_csd.max_packed_reads >= 5 && 1725abd9ac14SSeungwon Jeon host->caps2 & MMC_CAP2_PACKED_CMD) { 1726abd9ac14SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1727abd9ac14SSeungwon Jeon EXT_CSD_EXP_EVENTS_CTRL, 1728abd9ac14SSeungwon Jeon EXT_CSD_PACKED_EVENT_EN, 1729abd9ac14SSeungwon Jeon card->ext_csd.generic_cmd6_time); 1730abd9ac14SSeungwon Jeon if (err && err != -EBADMSG) 1731abd9ac14SSeungwon Jeon goto free_card; 1732abd9ac14SSeungwon Jeon if (err) { 1733abd9ac14SSeungwon Jeon pr_warn("%s: Enabling packed event failed\n", 1734abd9ac14SSeungwon Jeon mmc_hostname(card->host)); 1735abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 0; 1736abd9ac14SSeungwon Jeon err = 0; 1737abd9ac14SSeungwon Jeon } else { 1738abd9ac14SSeungwon Jeon card->ext_csd.packed_event_en = 1; 1739abd9ac14SSeungwon Jeon } 1740abd9ac14SSeungwon Jeon } 1741abd9ac14SSeungwon Jeon 17426abaa0c9SPierre Ossman if (!oldcard) 17437ea239d9SPierre Ossman host->card = card; 17447ea239d9SPierre Ossman 174517b0429dSPierre Ossman return 0; 17466abaa0c9SPierre Ossman 17476abaa0c9SPierre Ossman free_card: 17486abaa0c9SPierre Ossman if (!oldcard) 17496abaa0c9SPierre Ossman mmc_remove_card(card); 17506abaa0c9SPierre Ossman err: 1751adf66a0dSPierre Ossman return err; 17526abaa0c9SPierre Ossman } 17536abaa0c9SPierre Ossman 175407a68216SUlf Hansson static int mmc_can_sleep(struct mmc_card *card) 175507a68216SUlf Hansson { 175607a68216SUlf Hansson return (card && card->ext_csd.rev >= 3); 175707a68216SUlf Hansson } 175807a68216SUlf Hansson 175907a68216SUlf Hansson static int mmc_sleep(struct mmc_host *host) 176007a68216SUlf Hansson { 176107a68216SUlf Hansson struct mmc_command cmd = {0}; 176207a68216SUlf Hansson struct mmc_card *card = host->card; 1763cb962e04SUlf Hansson unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); 176407a68216SUlf Hansson int err; 176507a68216SUlf Hansson 1766436f8daaSAdrian Hunter /* Re-tuning can't be done once the card is deselected */ 1767436f8daaSAdrian Hunter mmc_retune_hold(host); 1768436f8daaSAdrian Hunter 176907a68216SUlf Hansson err = mmc_deselect_cards(host); 177007a68216SUlf Hansson if (err) 1771436f8daaSAdrian Hunter goto out_release; 177207a68216SUlf Hansson 177307a68216SUlf Hansson cmd.opcode = MMC_SLEEP_AWAKE; 177407a68216SUlf Hansson cmd.arg = card->rca << 16; 177507a68216SUlf Hansson cmd.arg |= 1 << 15; 177607a68216SUlf Hansson 1777cb962e04SUlf Hansson /* 1778cb962e04SUlf Hansson * If the max_busy_timeout of the host is specified, validate it against 1779cb962e04SUlf Hansson * the sleep cmd timeout. A failure means we need to prevent the host 1780cb962e04SUlf Hansson * from doing hw busy detection, which is done by converting to a R1 1781cb962e04SUlf Hansson * response instead of a R1B. 1782cb962e04SUlf Hansson */ 1783cb962e04SUlf Hansson if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { 1784cb962e04SUlf Hansson cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 1785cb962e04SUlf Hansson } else { 178607a68216SUlf Hansson cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; 1787cb962e04SUlf Hansson cmd.busy_timeout = timeout_ms; 1788cb962e04SUlf Hansson } 1789cb962e04SUlf Hansson 179007a68216SUlf Hansson err = mmc_wait_for_cmd(host, &cmd, 0); 179107a68216SUlf Hansson if (err) 1792436f8daaSAdrian Hunter goto out_release; 179307a68216SUlf Hansson 179407a68216SUlf Hansson /* 179507a68216SUlf Hansson * If the host does not wait while the card signals busy, then we will 179607a68216SUlf Hansson * will have to wait the sleep/awake timeout. Note, we cannot use the 179707a68216SUlf Hansson * SEND_STATUS command to poll the status because that command (and most 179807a68216SUlf Hansson * others) is invalid while the card sleeps. 179907a68216SUlf Hansson */ 1800cb962e04SUlf Hansson if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) 1801cb962e04SUlf Hansson mmc_delay(timeout_ms); 180207a68216SUlf Hansson 1803436f8daaSAdrian Hunter out_release: 1804436f8daaSAdrian Hunter mmc_retune_release(host); 180507a68216SUlf Hansson return err; 180607a68216SUlf Hansson } 180707a68216SUlf Hansson 1808e6c08586SUlf Hansson static int mmc_can_poweroff_notify(const struct mmc_card *card) 1809e6c08586SUlf Hansson { 1810e6c08586SUlf Hansson return card && 1811e6c08586SUlf Hansson mmc_card_mmc(card) && 1812e6c08586SUlf Hansson (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); 1813e6c08586SUlf Hansson } 1814e6c08586SUlf Hansson 1815e6c08586SUlf Hansson static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) 1816e6c08586SUlf Hansson { 1817e6c08586SUlf Hansson unsigned int timeout = card->ext_csd.generic_cmd6_time; 1818e6c08586SUlf Hansson int err; 1819e6c08586SUlf Hansson 1820e6c08586SUlf Hansson /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ 1821e6c08586SUlf Hansson if (notify_type == EXT_CSD_POWER_OFF_LONG) 1822e6c08586SUlf Hansson timeout = card->ext_csd.power_off_longtime; 1823e6c08586SUlf Hansson 1824878e200bSUlf Hansson err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1825e6c08586SUlf Hansson EXT_CSD_POWER_OFF_NOTIFICATION, 18264509f847SUlf Hansson notify_type, timeout, true, false, false); 1827e6c08586SUlf Hansson if (err) 1828e6c08586SUlf Hansson pr_err("%s: Power Off Notification timed out, %u\n", 1829e6c08586SUlf Hansson mmc_hostname(card->host), timeout); 1830e6c08586SUlf Hansson 1831e6c08586SUlf Hansson /* Disable the power off notification after the switch operation. */ 1832e6c08586SUlf Hansson card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; 1833e6c08586SUlf Hansson 1834e6c08586SUlf Hansson return err; 1835e6c08586SUlf Hansson } 1836e6c08586SUlf Hansson 18376abaa0c9SPierre Ossman /* 18386abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 18396abaa0c9SPierre Ossman */ 18406abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 18416abaa0c9SPierre Ossman { 18426abaa0c9SPierre Ossman BUG_ON(!host); 18436abaa0c9SPierre Ossman BUG_ON(!host->card); 18446abaa0c9SPierre Ossman 18456abaa0c9SPierre Ossman mmc_remove_card(host->card); 18466abaa0c9SPierre Ossman host->card = NULL; 18476abaa0c9SPierre Ossman } 18486abaa0c9SPierre Ossman 18496abaa0c9SPierre Ossman /* 1850d3049504SAdrian Hunter * Card detection - card is alive. 1851d3049504SAdrian Hunter */ 1852d3049504SAdrian Hunter static int mmc_alive(struct mmc_host *host) 1853d3049504SAdrian Hunter { 1854d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1855d3049504SAdrian Hunter } 1856d3049504SAdrian Hunter 1857d3049504SAdrian Hunter /* 18586abaa0c9SPierre Ossman * Card detection callback from host. 18596abaa0c9SPierre Ossman */ 18606abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 18616abaa0c9SPierre Ossman { 18626abaa0c9SPierre Ossman int err; 18636abaa0c9SPierre Ossman 18646abaa0c9SPierre Ossman BUG_ON(!host); 18656abaa0c9SPierre Ossman BUG_ON(!host->card); 18666abaa0c9SPierre Ossman 1867e94cfef6SUlf Hansson mmc_get_card(host->card); 18686abaa0c9SPierre Ossman 18696abaa0c9SPierre Ossman /* 18706abaa0c9SPierre Ossman * Just check if our card has been removed. 18716abaa0c9SPierre Ossman */ 1872d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 18736abaa0c9SPierre Ossman 1874e94cfef6SUlf Hansson mmc_put_card(host->card); 18757ea239d9SPierre Ossman 187617b0429dSPierre Ossman if (err) { 18774101c16aSPierre Ossman mmc_remove(host); 18786abaa0c9SPierre Ossman 18796abaa0c9SPierre Ossman mmc_claim_host(host); 18806abaa0c9SPierre Ossman mmc_detach_bus(host); 18817f7e4129SUlf Hansson mmc_power_off(host); 18826abaa0c9SPierre Ossman mmc_release_host(host); 18836abaa0c9SPierre Ossman } 18846abaa0c9SPierre Ossman } 18856abaa0c9SPierre Ossman 188603d071fcSUlf Hansson static int _mmc_suspend(struct mmc_host *host, bool is_suspend) 18876abaa0c9SPierre Ossman { 1888c3805467SBalaji T K int err = 0; 188903d071fcSUlf Hansson unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : 189003d071fcSUlf Hansson EXT_CSD_POWER_OFF_LONG; 1891c3805467SBalaji T K 18926abaa0c9SPierre Ossman BUG_ON(!host); 18936abaa0c9SPierre Ossman BUG_ON(!host->card); 18946abaa0c9SPierre Ossman 18956abaa0c9SPierre Ossman mmc_claim_host(host); 1896881d926dSMaya Erez 18979ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 18989ec775f7SUlf Hansson goto out; 18999ec775f7SUlf Hansson 190039b9431bSUlf Hansson if (mmc_card_doing_bkops(host->card)) { 190139b9431bSUlf Hansson err = mmc_stop_bkops(host->card); 190239b9431bSUlf Hansson if (err) 190339b9431bSUlf Hansson goto out; 190439b9431bSUlf Hansson } 190539b9431bSUlf Hansson 190610e5d965SUlf Hansson err = mmc_flush_cache(host->card); 1907881d926dSMaya Erez if (err) 1908881d926dSMaya Erez goto out; 1909881d926dSMaya Erez 191043235679SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 191153275c21SUlf Hansson ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend)) 191203d071fcSUlf Hansson err = mmc_poweroff_notify(host->card, notify_type); 191307a68216SUlf Hansson else if (mmc_can_sleep(host->card)) 191407a68216SUlf Hansson err = mmc_sleep(host); 1915e6c08586SUlf Hansson else if (!mmc_host_is_spi(host)) 191685e727edSJaehoon Chung err = mmc_deselect_cards(host); 191795cdfb72SNicolas Pitre 19189ec775f7SUlf Hansson if (!err) { 191974590263SUlf Hansson mmc_power_off(host); 19209ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 19219ec775f7SUlf Hansson } 1922881d926dSMaya Erez out: 1923881d926dSMaya Erez mmc_release_host(host); 1924c3805467SBalaji T K return err; 19256abaa0c9SPierre Ossman } 19266abaa0c9SPierre Ossman 19276abaa0c9SPierre Ossman /* 19280cb403a2SUlf Hansson * Suspend callback 192903d071fcSUlf Hansson */ 193003d071fcSUlf Hansson static int mmc_suspend(struct mmc_host *host) 193103d071fcSUlf Hansson { 19320cb403a2SUlf Hansson int err; 19330cb403a2SUlf Hansson 19340cb403a2SUlf Hansson err = _mmc_suspend(host, true); 19350cb403a2SUlf Hansson if (!err) { 19360cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 19370cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 19380cb403a2SUlf Hansson } 19390cb403a2SUlf Hansson 19400cb403a2SUlf Hansson return err; 194103d071fcSUlf Hansson } 194203d071fcSUlf Hansson 194303d071fcSUlf Hansson /* 19446abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 19456abaa0c9SPierre Ossman * and, if so, restore all state to it. 19466abaa0c9SPierre Ossman */ 19470cb403a2SUlf Hansson static int _mmc_resume(struct mmc_host *host) 19486abaa0c9SPierre Ossman { 19499ec775f7SUlf Hansson int err = 0; 19506abaa0c9SPierre Ossman 19516abaa0c9SPierre Ossman BUG_ON(!host); 19526abaa0c9SPierre Ossman BUG_ON(!host->card); 19536abaa0c9SPierre Ossman 19546abaa0c9SPierre Ossman mmc_claim_host(host); 19559ec775f7SUlf Hansson 19569ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 19579ec775f7SUlf Hansson goto out; 19589ec775f7SUlf Hansson 195969041150SUlf Hansson mmc_power_up(host, host->card->ocr); 196069041150SUlf Hansson err = mmc_init_card(host, host->card->ocr, host->card); 19619ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 19622986d0bfSPierre Ossman 19639ec775f7SUlf Hansson out: 19649ec775f7SUlf Hansson mmc_release_host(host); 196595cdfb72SNicolas Pitre return err; 19666abaa0c9SPierre Ossman } 19676abaa0c9SPierre Ossman 19689ec775f7SUlf Hansson /* 19699ec775f7SUlf Hansson * Shutdown callback 19709ec775f7SUlf Hansson */ 19719ec775f7SUlf Hansson static int mmc_shutdown(struct mmc_host *host) 19729ec775f7SUlf Hansson { 19739ec775f7SUlf Hansson int err = 0; 19749ec775f7SUlf Hansson 19759ec775f7SUlf Hansson /* 19769ec775f7SUlf Hansson * In a specific case for poweroff notify, we need to resume the card 19779ec775f7SUlf Hansson * before we can shutdown it properly. 19789ec775f7SUlf Hansson */ 19799ec775f7SUlf Hansson if (mmc_can_poweroff_notify(host->card) && 19809ec775f7SUlf Hansson !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) 19810cb403a2SUlf Hansson err = _mmc_resume(host); 19829ec775f7SUlf Hansson 19839ec775f7SUlf Hansson if (!err) 19849ec775f7SUlf Hansson err = _mmc_suspend(host, false); 19859ec775f7SUlf Hansson 19869ec775f7SUlf Hansson return err; 19879ec775f7SUlf Hansson } 1988c4d770d7SUlf Hansson 1989c4d770d7SUlf Hansson /* 19900cb403a2SUlf Hansson * Callback for resume. 19910cb403a2SUlf Hansson */ 19920cb403a2SUlf Hansson static int mmc_resume(struct mmc_host *host) 19930cb403a2SUlf Hansson { 19940cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 1995c29536e8SUlf Hansson return 0; 19960cb403a2SUlf Hansson } 19970cb403a2SUlf Hansson 19980cb403a2SUlf Hansson /* 1999c4d770d7SUlf Hansson * Callback for runtime_suspend. 2000c4d770d7SUlf Hansson */ 2001c4d770d7SUlf Hansson static int mmc_runtime_suspend(struct mmc_host *host) 2002c4d770d7SUlf Hansson { 2003c4d770d7SUlf Hansson int err; 2004c4d770d7SUlf Hansson 2005c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 2006c4d770d7SUlf Hansson return 0; 2007c4d770d7SUlf Hansson 20080cb403a2SUlf Hansson err = _mmc_suspend(host, true); 20090cc81a8cSUlf Hansson if (err) 2010f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 2011c4d770d7SUlf Hansson mmc_hostname(host), err); 2012c4d770d7SUlf Hansson 2013c4d770d7SUlf Hansson return err; 2014c4d770d7SUlf Hansson } 2015c4d770d7SUlf Hansson 2016c4d770d7SUlf Hansson /* 2017c4d770d7SUlf Hansson * Callback for runtime_resume. 2018c4d770d7SUlf Hansson */ 2019c4d770d7SUlf Hansson static int mmc_runtime_resume(struct mmc_host *host) 2020c4d770d7SUlf Hansson { 2021c4d770d7SUlf Hansson int err; 2022c4d770d7SUlf Hansson 20230cb403a2SUlf Hansson err = _mmc_resume(host); 2024520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 2025c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 2026c4d770d7SUlf Hansson mmc_hostname(host), err); 2027c4d770d7SUlf Hansson 2028c4d770d7SUlf Hansson return 0; 2029c4d770d7SUlf Hansson } 2030c4d770d7SUlf Hansson 2031f855a371SJohan Rudholm int mmc_can_reset(struct mmc_card *card) 2032f855a371SJohan Rudholm { 2033f855a371SJohan Rudholm u8 rst_n_function; 2034f855a371SJohan Rudholm 2035f855a371SJohan Rudholm rst_n_function = card->ext_csd.rst_n_function; 2036f855a371SJohan Rudholm if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) 2037f855a371SJohan Rudholm return 0; 2038f855a371SJohan Rudholm return 1; 2039f855a371SJohan Rudholm } 2040f855a371SJohan Rudholm EXPORT_SYMBOL(mmc_can_reset); 2041f855a371SJohan Rudholm 2042f855a371SJohan Rudholm static int mmc_reset(struct mmc_host *host) 2043f855a371SJohan Rudholm { 2044f855a371SJohan Rudholm struct mmc_card *card = host->card; 2045f855a371SJohan Rudholm 2046437db4c6SAdrian Hunter /* 2047437db4c6SAdrian Hunter * In the case of recovery, we can't expect flushing the cache to work 2048437db4c6SAdrian Hunter * always, but we have a go and ignore errors. 2049437db4c6SAdrian Hunter */ 2050437db4c6SAdrian Hunter mmc_flush_cache(host->card); 2051437db4c6SAdrian Hunter 20524e6c7178SGwendal Grignou if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset && 20534e6c7178SGwendal Grignou mmc_can_reset(card)) { 20544e6c7178SGwendal Grignou /* If the card accept RST_n signal, send it. */ 2055f855a371SJohan Rudholm mmc_set_clock(host, host->f_init); 2056f855a371SJohan Rudholm host->ops->hw_reset(host); 2057f855a371SJohan Rudholm /* Set initial state and call mmc_set_ios */ 2058f855a371SJohan Rudholm mmc_set_initial_state(host); 20594e6c7178SGwendal Grignou } else { 20604e6c7178SGwendal Grignou /* Do a brute force power cycle */ 20614e6c7178SGwendal Grignou mmc_power_cycle(host, card->ocr); 20624e6c7178SGwendal Grignou } 2063364549ddSUlf Hansson return mmc_init_card(host, card->ocr, card); 2064f855a371SJohan Rudholm } 2065f855a371SJohan Rudholm 20669feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 20679feae246SAdrian Hunter .remove = mmc_remove, 20689feae246SAdrian Hunter .detect = mmc_detect, 20699feae246SAdrian Hunter .suspend = mmc_suspend, 20709feae246SAdrian Hunter .resume = mmc_resume, 2071c4d770d7SUlf Hansson .runtime_suspend = mmc_runtime_suspend, 2072c4d770d7SUlf Hansson .runtime_resume = mmc_runtime_resume, 2073d3049504SAdrian Hunter .alive = mmc_alive, 2074486fdbbcSUlf Hansson .shutdown = mmc_shutdown, 2075f855a371SJohan Rudholm .reset = mmc_reset, 20769feae246SAdrian Hunter }; 20779feae246SAdrian Hunter 20786abaa0c9SPierre Ossman /* 20796abaa0c9SPierre Ossman * Starting point for MMC card init. 20806abaa0c9SPierre Ossman */ 2081807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 20826abaa0c9SPierre Ossman { 20836abaa0c9SPierre Ossman int err; 208469041150SUlf Hansson u32 ocr, rocr; 20856abaa0c9SPierre Ossman 20866abaa0c9SPierre Ossman BUG_ON(!host); 2087d84075c8SPierre Ossman WARN_ON(!host->claimed); 20886abaa0c9SPierre Ossman 208944669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 209044669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 209144669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 209244669034SStefan Nilsson XK 2093807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 2094807e8e40SAndy Ross if (err) 2095807e8e40SAndy Ross return err; 2096807e8e40SAndy Ross 20972501c917SUlf Hansson mmc_attach_bus(host, &mmc_ops); 20988f230f45STakashi Iwai if (host->ocr_avail_mmc) 20998f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 21006abaa0c9SPierre Ossman 21016abaa0c9SPierre Ossman /* 2102af517150SDavid Brownell * We need to get OCR a different way for SPI. 2103af517150SDavid Brownell */ 2104af517150SDavid Brownell if (mmc_host_is_spi(host)) { 2105af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 2106af517150SDavid Brownell if (err) 2107af517150SDavid Brownell goto err; 2108af517150SDavid Brownell } 2109af517150SDavid Brownell 211069041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 21116abaa0c9SPierre Ossman 21126abaa0c9SPierre Ossman /* 21136abaa0c9SPierre Ossman * Can we support the voltage of the card? 21146abaa0c9SPierre Ossman */ 211569041150SUlf Hansson if (!rocr) { 2116109b5bedSPierre Ossman err = -EINVAL; 21176abaa0c9SPierre Ossman goto err; 2118109b5bedSPierre Ossman } 21196abaa0c9SPierre Ossman 21206abaa0c9SPierre Ossman /* 21216abaa0c9SPierre Ossman * Detect and init the card. 21226abaa0c9SPierre Ossman */ 212369041150SUlf Hansson err = mmc_init_card(host, rocr, NULL); 212417b0429dSPierre Ossman if (err) 21256abaa0c9SPierre Ossman goto err; 21266abaa0c9SPierre Ossman 21276abaa0c9SPierre Ossman mmc_release_host(host); 21284101c16aSPierre Ossman err = mmc_add_card(host->card); 21297ea239d9SPierre Ossman if (err) 21302986d0bfSPierre Ossman goto remove_card; 21317ea239d9SPierre Ossman 21322860d060SSergei Shtylyov mmc_claim_host(host); 21337ea239d9SPierre Ossman return 0; 21347ea239d9SPierre Ossman 21352986d0bfSPierre Ossman remove_card: 21366abaa0c9SPierre Ossman mmc_remove_card(host->card); 21372986d0bfSPierre Ossman mmc_claim_host(host); 2138807e8e40SAndy Ross host->card = NULL; 21397ea239d9SPierre Ossman err: 21407ea239d9SPierre Ossman mmc_detach_bus(host); 21417ea239d9SPierre Ossman 2142a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising MMC card\n", 2143109b5bedSPierre Ossman mmc_hostname(host), err); 2144109b5bedSPierre Ossman 2145adf66a0dSPierre Ossman return err; 21467ea239d9SPierre Ossman } 2147