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> 145a0e3ad6STejun Heo #include <linux/slab.h> 157ea239d9SPierre Ossman 167ea239d9SPierre Ossman #include <linux/mmc/host.h> 177ea239d9SPierre Ossman #include <linux/mmc/card.h> 187ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 197ea239d9SPierre Ossman 207ea239d9SPierre Ossman #include "core.h" 214101c16aSPierre Ossman #include "bus.h" 227ea239d9SPierre Ossman #include "mmc_ops.h" 234c4cb171SPhilip Rakity #include "sd_ops.h" 247ea239d9SPierre Ossman 257ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 267ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 277ea239d9SPierre Ossman 0, 0, 0, 0 287ea239d9SPierre Ossman }; 297ea239d9SPierre Ossman 307ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 317ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 327ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 337ea239d9SPierre Ossman }; 347ea239d9SPierre Ossman 357ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 367ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 377ea239d9SPierre Ossman }; 387ea239d9SPierre Ossman 397ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 407ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 417ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 427ea239d9SPierre Ossman }; 437ea239d9SPierre Ossman 447ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 457ea239d9SPierre Ossman ({ \ 467ea239d9SPierre Ossman const int __size = size; \ 477ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 487ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 497ea239d9SPierre Ossman const int __shft = (start) & 31; \ 507ea239d9SPierre Ossman u32 __res; \ 517ea239d9SPierre Ossman \ 527ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 537ea239d9SPierre Ossman if (__size + __shft > 32) \ 547ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 557ea239d9SPierre Ossman __res & __mask; \ 567ea239d9SPierre Ossman }) 577ea239d9SPierre Ossman 587ea239d9SPierre Ossman /* 597ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 607ea239d9SPierre Ossman */ 61bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 627ea239d9SPierre Ossman { 637ea239d9SPierre Ossman u32 *resp = card->raw_cid; 647ea239d9SPierre Ossman 657ea239d9SPierre Ossman /* 667ea239d9SPierre Ossman * The selection of the format here is based upon published 677ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 687ea239d9SPierre Ossman */ 697ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 707ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 717ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 727ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 737ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 747ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 757ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 767ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 777ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 787ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 797ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 807ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 817ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 827ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 837ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 847ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 857ea239d9SPierre Ossman break; 867ea239d9SPierre Ossman 877ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 887ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 897ea239d9SPierre Ossman case 4: /* MMC v4 */ 907ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 917ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 927ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 937ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 947ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 957ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 967ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 977ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 987ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 997ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 1007ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1017ea239d9SPierre Ossman break; 1027ea239d9SPierre Ossman 1037ea239d9SPierre Ossman default: 104facba917SPierre Ossman printk(KERN_ERR "%s: card has unknown MMCA version %d\n", 1057ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 106bd766312SPierre Ossman return -EINVAL; 1077ea239d9SPierre Ossman } 108bd766312SPierre Ossman 109bd766312SPierre Ossman return 0; 1107ea239d9SPierre Ossman } 1117ea239d9SPierre Ossman 112dfe86cbaSAdrian Hunter static void mmc_set_erase_size(struct mmc_card *card) 113dfe86cbaSAdrian Hunter { 114dfe86cbaSAdrian Hunter if (card->ext_csd.erase_group_def & 1) 115dfe86cbaSAdrian Hunter card->erase_size = card->ext_csd.hc_erase_size; 116dfe86cbaSAdrian Hunter else 117dfe86cbaSAdrian Hunter card->erase_size = card->csd.erase_size; 118dfe86cbaSAdrian Hunter 119dfe86cbaSAdrian Hunter mmc_init_erase(card); 120dfe86cbaSAdrian Hunter } 121dfe86cbaSAdrian Hunter 1227ea239d9SPierre Ossman /* 1237ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1247ea239d9SPierre Ossman */ 125bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1267ea239d9SPierre Ossman { 1277ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 128dfe86cbaSAdrian Hunter unsigned int e, m, a, b; 1297ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1307ea239d9SPierre Ossman 1317ea239d9SPierre Ossman /* 1327ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1337ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1346da24b78SKyungmin Park * We also support eMMC v4.4 & v4.41. 1357ea239d9SPierre Ossman */ 1366da24b78SKyungmin Park csd->structure = UNSTUFF_BITS(resp, 126, 2); 1376da24b78SKyungmin Park if (csd->structure == 0) { 138facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1396da24b78SKyungmin Park mmc_hostname(card->host), csd->structure); 140bd766312SPierre Ossman return -EINVAL; 1417ea239d9SPierre Ossman } 1427ea239d9SPierre Ossman 1437ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1447ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1457ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1467ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1477ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1487ea239d9SPierre Ossman 1497ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1507ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1517ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1527ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1537ea239d9SPierre Ossman 1547ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1557ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1567ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1577ea239d9SPierre Ossman 1587ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1597ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1607ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1617ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1627ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1637ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1647ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 165bd766312SPierre Ossman 166dfe86cbaSAdrian Hunter if (csd->write_blkbits >= 9) { 167dfe86cbaSAdrian Hunter a = UNSTUFF_BITS(resp, 42, 5); 168dfe86cbaSAdrian Hunter b = UNSTUFF_BITS(resp, 37, 5); 169dfe86cbaSAdrian Hunter csd->erase_size = (a + 1) * (b + 1); 170dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 171dfe86cbaSAdrian Hunter } 172dfe86cbaSAdrian Hunter 173bd766312SPierre Ossman return 0; 1747ea239d9SPierre Ossman } 1757ea239d9SPierre Ossman 1767ea239d9SPierre Ossman /* 17789a73cf5SPierre Ossman * Read and decode extended CSD. 1787ea239d9SPierre Ossman */ 17989a73cf5SPierre Ossman static int mmc_read_ext_csd(struct mmc_card *card) 1807ea239d9SPierre Ossman { 1817ea239d9SPierre Ossman int err; 1827ea239d9SPierre Ossman u8 *ext_csd; 1837ea239d9SPierre Ossman 1847ea239d9SPierre Ossman BUG_ON(!card); 1857ea239d9SPierre Ossman 1867ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 18717b0429dSPierre Ossman return 0; 1887ea239d9SPierre Ossman 1897ea239d9SPierre Ossman /* 1907ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1917ea239d9SPierre Ossman * raw block in mmc_card. 1927ea239d9SPierre Ossman */ 1937ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1947ea239d9SPierre Ossman if (!ext_csd) { 1957ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 196adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 19717b0429dSPierre Ossman return -ENOMEM; 1987ea239d9SPierre Ossman } 1997ea239d9SPierre Ossman 2007ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 20117b0429dSPierre Ossman if (err) { 202d08ebeddSWolfgang Muees /* If the host or the card can't do the switch, 203d08ebeddSWolfgang Muees * fail more gracefully. */ 204d08ebeddSWolfgang Muees if ((err != -EINVAL) 205d08ebeddSWolfgang Muees && (err != -ENOSYS) 206d08ebeddSWolfgang Muees && (err != -EFAULT)) 207adf66a0dSPierre Ossman goto out; 208adf66a0dSPierre Ossman 209adf66a0dSPierre Ossman /* 2107ea239d9SPierre Ossman * High capacity cards should have this "magic" size 2117ea239d9SPierre Ossman * stored in their CSD. 2127ea239d9SPierre Ossman */ 2137ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 2147ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 2157ea239d9SPierre Ossman "on a possible high capacity card. " 2167ea239d9SPierre Ossman "Card will be ignored.\n", 2177ea239d9SPierre Ossman mmc_hostname(card->host)); 2187ea239d9SPierre Ossman } else { 2197ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2207ea239d9SPierre Ossman "EXT_CSD, performance might " 2217ea239d9SPierre Ossman "suffer.\n", 2227ea239d9SPierre Ossman mmc_hostname(card->host)); 22317b0429dSPierre Ossman err = 0; 2247ea239d9SPierre Ossman } 225adf66a0dSPierre Ossman 2267ea239d9SPierre Ossman goto out; 2277ea239d9SPierre Ossman } 2287ea239d9SPierre Ossman 2296da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 2306da24b78SKyungmin Park if (card->csd.structure == 3) { 2316da24b78SKyungmin Park int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE]; 2326da24b78SKyungmin Park if (ext_csd_struct > 2) { 2338fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2348fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 2356da24b78SKyungmin Park ext_csd_struct); 2366da24b78SKyungmin Park err = -EINVAL; 2376da24b78SKyungmin Park goto out; 2386da24b78SKyungmin Park } 2396da24b78SKyungmin Park } 2406da24b78SKyungmin Park 2416da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 2426da24b78SKyungmin Park if (card->ext_csd.rev > 5) { 2436da24b78SKyungmin Park printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n", 2446da24b78SKyungmin Park mmc_hostname(card->host), card->ext_csd.rev); 24500cedfa6SFlorin Malita err = -EINVAL; 24600cedfa6SFlorin Malita goto out; 247d7604d76SPierre Ossman } 248d7604d76SPierre Ossman 249b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2507ea239d9SPierre Ossman card->ext_csd.sectors = 2517ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2527ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2537ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2547ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 255fc8a0985SHanumath Prasad 256fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 257fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 2587ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 259d7604d76SPierre Ossman } 2607ea239d9SPierre Ossman 2617198f3c9SAdrian Hunter switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { 262dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | 263dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 264dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 265dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; 266dfc13e84SHanumath Prasad break; 267dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | 268dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 269dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 270dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; 271dfc13e84SHanumath Prasad break; 272dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | 273dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 274dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 275dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; 276dfc13e84SHanumath Prasad break; 2777ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2787ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2797ea239d9SPierre Ossman break; 2807ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2817ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2827ea239d9SPierre Ossman break; 2837ea239d9SPierre Ossman default: 2847ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2857ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2867ea239d9SPierre Ossman "support any high-speed modes.\n", 2877ea239d9SPierre Ossman mmc_hostname(card->host)); 2887ea239d9SPierre Ossman } 2897ea239d9SPierre Ossman 290b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 291b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 292371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 293371a689fSAndrei Warkentin 294371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 295371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 296b1ebe384SJarkko Lavinen 297b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 298b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 299b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 300b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 301dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 302dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 303dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 304dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 305dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 306dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 307f4c5522bSAndrei Warkentin 308f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 309371a689fSAndrei Warkentin 310371a689fSAndrei Warkentin /* 311371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 312371a689fSAndrei Warkentin * multiples of 128K. 313371a689fSAndrei Warkentin */ 314371a689fSAndrei Warkentin card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 315b1ebe384SJarkko Lavinen } 316b1ebe384SJarkko Lavinen 317dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 318709de99dSChuanxiao Dong /* 319709de99dSChuanxiao Dong * Enhanced area feature support -- check whether the eMMC 320709de99dSChuanxiao Dong * card has the Enhanced area enabled. If so, export enhanced 321709de99dSChuanxiao Dong * area offset and size to user by adding sysfs interface. 322709de99dSChuanxiao Dong */ 323709de99dSChuanxiao Dong if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 324709de99dSChuanxiao Dong (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 325709de99dSChuanxiao Dong u8 hc_erase_grp_sz = 326709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 327709de99dSChuanxiao Dong u8 hc_wp_grp_sz = 328709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 329709de99dSChuanxiao Dong 330709de99dSChuanxiao Dong card->ext_csd.enhanced_area_en = 1; 331709de99dSChuanxiao Dong /* 332709de99dSChuanxiao Dong * calculate the enhanced data area offset, in bytes 333709de99dSChuanxiao Dong */ 334709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = 335709de99dSChuanxiao Dong (ext_csd[139] << 24) + (ext_csd[138] << 16) + 336709de99dSChuanxiao Dong (ext_csd[137] << 8) + ext_csd[136]; 337709de99dSChuanxiao Dong if (mmc_card_blockaddr(card)) 338709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset <<= 9; 339709de99dSChuanxiao Dong /* 340709de99dSChuanxiao Dong * calculate the enhanced data area size, in kilobytes 341709de99dSChuanxiao Dong */ 342709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = 343709de99dSChuanxiao Dong (ext_csd[142] << 16) + (ext_csd[141] << 8) + 344709de99dSChuanxiao Dong ext_csd[140]; 345709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size *= 346709de99dSChuanxiao Dong (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 347709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size <<= 9; 348709de99dSChuanxiao Dong } else { 349709de99dSChuanxiao Dong /* 350709de99dSChuanxiao Dong * If the enhanced area is not enabled, disable these 351709de99dSChuanxiao Dong * device attributes. 352709de99dSChuanxiao Dong */ 353709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 354709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 355709de99dSChuanxiao Dong } 356dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 357dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 358dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 359dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 360dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 361dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 362dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 363dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 364dfe86cbaSAdrian Hunter } 365dfe86cbaSAdrian Hunter 366f4c5522bSAndrei Warkentin if (card->ext_csd.rev >= 5) 367f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 368f4c5522bSAndrei Warkentin 369dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 370dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 371dfe86cbaSAdrian Hunter else 372dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 373dfe86cbaSAdrian Hunter 3747ea239d9SPierre Ossman out: 3757ea239d9SPierre Ossman kfree(ext_csd); 3767ea239d9SPierre Ossman 3777ea239d9SPierre Ossman return err; 3787ea239d9SPierre Ossman } 3797ea239d9SPierre Ossman 38051ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 38151ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 38251ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 38351ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 38451ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 385dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 386dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 38751ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 38851ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 38951ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 39051ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 39151ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 39251ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 393709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 394709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 395709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 39651ec92e2SPierre Ossman 39751ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 39851ec92e2SPierre Ossman &dev_attr_cid.attr, 39951ec92e2SPierre Ossman &dev_attr_csd.attr, 40051ec92e2SPierre Ossman &dev_attr_date.attr, 401dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 402dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 40351ec92e2SPierre Ossman &dev_attr_fwrev.attr, 40451ec92e2SPierre Ossman &dev_attr_hwrev.attr, 40551ec92e2SPierre Ossman &dev_attr_manfid.attr, 40651ec92e2SPierre Ossman &dev_attr_name.attr, 40751ec92e2SPierre Ossman &dev_attr_oemid.attr, 40851ec92e2SPierre Ossman &dev_attr_serial.attr, 409709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 410709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 41151ec92e2SPierre Ossman NULL, 41251ec92e2SPierre Ossman }; 41351ec92e2SPierre Ossman 41451ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 41551ec92e2SPierre Ossman .attrs = mmc_std_attrs, 41651ec92e2SPierre Ossman }; 41751ec92e2SPierre Ossman 418a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 41951ec92e2SPierre Ossman &mmc_std_attr_group, 42051ec92e2SPierre Ossman NULL, 42151ec92e2SPierre Ossman }; 42251ec92e2SPierre Ossman 42351ec92e2SPierre Ossman static struct device_type mmc_type = { 42451ec92e2SPierre Ossman .groups = mmc_attr_groups, 42551ec92e2SPierre Ossman }; 42651ec92e2SPierre Ossman 4277ea239d9SPierre Ossman /* 4286abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 4296abaa0c9SPierre Ossman * 4308769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 4316abaa0c9SPierre Ossman * we're trying to reinitialise. 4327ea239d9SPierre Ossman */ 4338c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 4346abaa0c9SPierre Ossman struct mmc_card *oldcard) 4357ea239d9SPierre Ossman { 4367ea239d9SPierre Ossman struct mmc_card *card; 43725d5c699SPhilip Rakity int err, ddr = 0; 4387ea239d9SPierre Ossman u32 cid[4]; 4397ea239d9SPierre Ossman unsigned int max_dtr; 440b676f039SPhilip Rakity u32 rocr; 4417ea239d9SPierre Ossman 4427ea239d9SPierre Ossman BUG_ON(!host); 443d84075c8SPierre Ossman WARN_ON(!host->claimed); 4447ea239d9SPierre Ossman 4457ea239d9SPierre Ossman /* 4467ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 4477ea239d9SPierre Ossman * need to tell some cards to go back to the idle 4487ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 4497ea239d9SPierre Ossman * respond. 4507ea239d9SPierre Ossman */ 4517ea239d9SPierre Ossman mmc_go_idle(host); 4527ea239d9SPierre Ossman 4537ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 454b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 45517b0429dSPierre Ossman if (err) 4566abaa0c9SPierre Ossman goto err; 4577ea239d9SPierre Ossman 4587ea239d9SPierre Ossman /* 459af517150SDavid Brownell * For SPI, enable CRC as appropriate. 460af517150SDavid Brownell */ 461af517150SDavid Brownell if (mmc_host_is_spi(host)) { 462af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 463af517150SDavid Brownell if (err) 464af517150SDavid Brownell goto err; 465af517150SDavid Brownell } 466af517150SDavid Brownell 467af517150SDavid Brownell /* 4687ea239d9SPierre Ossman * Fetch CID from card. 4697ea239d9SPierre Ossman */ 470af517150SDavid Brownell if (mmc_host_is_spi(host)) 471af517150SDavid Brownell err = mmc_send_cid(host, cid); 472af517150SDavid Brownell else 4737ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 47417b0429dSPierre Ossman if (err) 4757ea239d9SPierre Ossman goto err; 4767ea239d9SPierre Ossman 4776abaa0c9SPierre Ossman if (oldcard) { 478adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 479adf66a0dSPierre Ossman err = -ENOENT; 4806abaa0c9SPierre Ossman goto err; 481adf66a0dSPierre Ossman } 4826abaa0c9SPierre Ossman 4836abaa0c9SPierre Ossman card = oldcard; 4846abaa0c9SPierre Ossman } else { 4857ea239d9SPierre Ossman /* 4867ea239d9SPierre Ossman * Allocate card structure. 4877ea239d9SPierre Ossman */ 48851ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 489adf66a0dSPierre Ossman if (IS_ERR(card)) { 490adf66a0dSPierre Ossman err = PTR_ERR(card); 4917ea239d9SPierre Ossman goto err; 492adf66a0dSPierre Ossman } 4937ea239d9SPierre Ossman 4947ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 4957ea239d9SPierre Ossman card->rca = 1; 4967ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 4976abaa0c9SPierre Ossman } 4987ea239d9SPierre Ossman 4997ea239d9SPierre Ossman /* 500af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 5017ea239d9SPierre Ossman */ 502af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 5037ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 50417b0429dSPierre Ossman if (err) 5057ea239d9SPierre Ossman goto free_card; 5067ea239d9SPierre Ossman 5077ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 508af517150SDavid Brownell } 5097ea239d9SPierre Ossman 5106abaa0c9SPierre Ossman if (!oldcard) { 5117ea239d9SPierre Ossman /* 5127ea239d9SPierre Ossman * Fetch CSD from card. 5137ea239d9SPierre Ossman */ 5147ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 51517b0429dSPierre Ossman if (err) 5167ea239d9SPierre Ossman goto free_card; 5177ea239d9SPierre Ossman 518bd766312SPierre Ossman err = mmc_decode_csd(card); 519adf66a0dSPierre Ossman if (err) 520bd766312SPierre Ossman goto free_card; 521bd766312SPierre Ossman err = mmc_decode_cid(card); 522adf66a0dSPierre Ossman if (err) 523bd766312SPierre Ossman goto free_card; 5246abaa0c9SPierre Ossman } 5257ea239d9SPierre Ossman 5267ea239d9SPierre Ossman /* 52789a73cf5SPierre Ossman * Select card, as all following commands rely on that. 5287ea239d9SPierre Ossman */ 529af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 5307ea239d9SPierre Ossman err = mmc_select_card(card); 53117b0429dSPierre Ossman if (err) 5327ea239d9SPierre Ossman goto free_card; 533af517150SDavid Brownell } 5347ea239d9SPierre Ossman 5356abaa0c9SPierre Ossman if (!oldcard) { 53689a73cf5SPierre Ossman /* 537af517150SDavid Brownell * Fetch and process extended CSD. 53889a73cf5SPierre Ossman */ 53989a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 54017b0429dSPierre Ossman if (err) 5417ea239d9SPierre Ossman goto free_card; 542b676f039SPhilip Rakity 543b676f039SPhilip Rakity /* If doing byte addressing, check if required to do sector 544b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 545b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 546b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 547b676f039SPhilip Rakity */ 548b676f039SPhilip Rakity if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) 549b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 550b676f039SPhilip Rakity 551dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 552dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 5536abaa0c9SPierre Ossman } 5547ea239d9SPierre Ossman 5557ea239d9SPierre Ossman /* 556709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 557709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 558709de99dSChuanxiao Dong */ 559709de99dSChuanxiao Dong if (card->ext_csd.enhanced_area_en) { 560709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 561d3a8d95dSAndrei Warkentin EXT_CSD_ERASE_GROUP_DEF, 1, 0); 562709de99dSChuanxiao Dong 563709de99dSChuanxiao Dong if (err && err != -EBADMSG) 564709de99dSChuanxiao Dong goto free_card; 565709de99dSChuanxiao Dong 566709de99dSChuanxiao Dong if (err) { 567709de99dSChuanxiao Dong err = 0; 568709de99dSChuanxiao Dong /* 569709de99dSChuanxiao Dong * Just disable enhanced area off & sz 570709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 571709de99dSChuanxiao Dong * during next time reinit 572709de99dSChuanxiao Dong */ 573709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 574709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 575709de99dSChuanxiao Dong } else { 576709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 577709de99dSChuanxiao Dong /* 578709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 579709de99dSChuanxiao Dong * This will affect the erase size, so 580709de99dSChuanxiao Dong * here need to reset erase size 581709de99dSChuanxiao Dong */ 582709de99dSChuanxiao Dong mmc_set_erase_size(card); 583709de99dSChuanxiao Dong } 584709de99dSChuanxiao Dong } 585709de99dSChuanxiao Dong 586709de99dSChuanxiao Dong /* 58741e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 58841e2a489SPhilip Rakity */ 589371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 590371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 591371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 592371a689fSAndrei Warkentin card->ext_csd.part_config, 593371a689fSAndrei Warkentin card->ext_csd.part_time); 594371a689fSAndrei Warkentin if (err && err != -EBADMSG) 595371a689fSAndrei Warkentin goto free_card; 59641e2a489SPhilip Rakity } 59741e2a489SPhilip Rakity 59841e2a489SPhilip Rakity /* 59989a73cf5SPierre Ossman * Activate high speed (if supported) 60089a73cf5SPierre Ossman */ 60189a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 60289a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 60389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 604d3a8d95dSAndrei Warkentin EXT_CSD_HS_TIMING, 1, 0); 605ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 60689a73cf5SPierre Ossman goto free_card; 60789a73cf5SPierre Ossman 608ef0b27d4SAdrian Hunter if (err) { 609ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to highspeed failed\n", 610ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 611ef0b27d4SAdrian Hunter err = 0; 612ef0b27d4SAdrian Hunter } else { 61389a73cf5SPierre Ossman mmc_card_set_highspeed(card); 61489a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 61589a73cf5SPierre Ossman } 616ef0b27d4SAdrian Hunter } 61789a73cf5SPierre Ossman 61889a73cf5SPierre Ossman /* 6197ea239d9SPierre Ossman * Compute bus speed. 6207ea239d9SPierre Ossman */ 6217ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 6227ea239d9SPierre Ossman 6237ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 6247ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 6257ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 6267ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 6277ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 6287ea239d9SPierre Ossman } 6297ea239d9SPierre Ossman 6307ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 6317ea239d9SPierre Ossman 63289a73cf5SPierre Ossman /* 6330f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 634dfc13e84SHanumath Prasad */ 635dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 636dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 6374c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_8V_DDR | 6384c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 6394c4cb171SPhilip Rakity == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50))) 64049e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 641dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 6424c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_2V_DDR | 6434c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 6444c4cb171SPhilip Rakity == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50))) 64549e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 646dfc13e84SHanumath Prasad } 647dfc13e84SHanumath Prasad 648dfc13e84SHanumath Prasad /* 6490f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 65089a73cf5SPierre Ossman */ 65189a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 652b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 65322113efdSAries Lee static unsigned ext_csd_bits[][2] = { 65422113efdSAries Lee { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, 65522113efdSAries Lee { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, 65622113efdSAries Lee { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, 65722113efdSAries Lee }; 65822113efdSAries Lee static unsigned bus_widths[] = { 65922113efdSAries Lee MMC_BUS_WIDTH_8, 66022113efdSAries Lee MMC_BUS_WIDTH_4, 66122113efdSAries Lee MMC_BUS_WIDTH_1 66222113efdSAries Lee }; 66322113efdSAries Lee unsigned idx, bus_width = 0; 664b30f8af3SJarkko Lavinen 66522113efdSAries Lee if (host->caps & MMC_CAP_8_BIT_DATA) 66622113efdSAries Lee idx = 0; 667dfc13e84SHanumath Prasad else 66822113efdSAries Lee idx = 1; 66922113efdSAries Lee for (; idx < ARRAY_SIZE(bus_widths); idx++) { 67022113efdSAries Lee bus_width = bus_widths[idx]; 67122113efdSAries Lee if (bus_width == MMC_BUS_WIDTH_1) 67222113efdSAries Lee ddr = 0; /* no DDR for 1-bit width */ 67322113efdSAries Lee err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 67422113efdSAries Lee EXT_CSD_BUS_WIDTH, 675d3a8d95dSAndrei Warkentin ext_csd_bits[idx][0], 676d3a8d95dSAndrei Warkentin 0); 67722113efdSAries Lee if (!err) { 6784c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 67922113efdSAries Lee /* 68022113efdSAries Lee * If controller can't handle bus width test, 68122113efdSAries Lee * use the highest bus width to maintain 68222113efdSAries Lee * compatibility with previous MMC behavior. 68322113efdSAries Lee */ 68422113efdSAries Lee if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 68522113efdSAries Lee break; 68622113efdSAries Lee err = mmc_bus_test(card, bus_width); 68722113efdSAries Lee if (!err) 68822113efdSAries Lee break; 68922113efdSAries Lee } 690b30f8af3SJarkko Lavinen } 691b30f8af3SJarkko Lavinen 69222113efdSAries Lee if (!err && ddr) { 69389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 69422113efdSAries Lee EXT_CSD_BUS_WIDTH, 695d3a8d95dSAndrei Warkentin ext_csd_bits[idx][1], 696d3a8d95dSAndrei Warkentin 0); 69722113efdSAries Lee } 698ef0b27d4SAdrian Hunter if (err) { 6990f8d8ea6SAdrian Hunter printk(KERN_WARNING "%s: switch to bus width %d ddr %d " 700ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 7010f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 70222113efdSAries Lee goto free_card; 70322113efdSAries Lee } else if (ddr) { 7044c4cb171SPhilip Rakity /* 7054c4cb171SPhilip Rakity * eMMC cards can support 3.3V to 1.2V i/o (vccq) 7064c4cb171SPhilip Rakity * signaling. 7074c4cb171SPhilip Rakity * 7084c4cb171SPhilip Rakity * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 7094c4cb171SPhilip Rakity * 7104c4cb171SPhilip Rakity * 1.8V vccq at 3.3V core voltage (vcc) is not required 7114c4cb171SPhilip Rakity * in the JEDEC spec for DDR. 7124c4cb171SPhilip Rakity * 7134c4cb171SPhilip Rakity * Do not force change in vccq since we are obviously 7144c4cb171SPhilip Rakity * working and no change to vccq is needed. 7154c4cb171SPhilip Rakity * 7164c4cb171SPhilip Rakity * WARNING: eMMC rules are NOT the same as SD DDR 7174c4cb171SPhilip Rakity */ 7184c4cb171SPhilip Rakity if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) { 7194c4cb171SPhilip Rakity err = mmc_set_signal_voltage(host, 7204c4cb171SPhilip Rakity MMC_SIGNAL_VOLTAGE_120, 0); 7214c4cb171SPhilip Rakity if (err) 7224c4cb171SPhilip Rakity goto err; 7234c4cb171SPhilip Rakity } 7240f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 7254c4cb171SPhilip Rakity mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50); 7264c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 72789a73cf5SPierre Ossman } 728ef0b27d4SAdrian Hunter } 72989a73cf5SPierre Ossman 7306abaa0c9SPierre Ossman if (!oldcard) 7317ea239d9SPierre Ossman host->card = card; 7327ea239d9SPierre Ossman 73317b0429dSPierre Ossman return 0; 7346abaa0c9SPierre Ossman 7356abaa0c9SPierre Ossman free_card: 7366abaa0c9SPierre Ossman if (!oldcard) 7376abaa0c9SPierre Ossman mmc_remove_card(card); 7386abaa0c9SPierre Ossman err: 7396abaa0c9SPierre Ossman 740adf66a0dSPierre Ossman return err; 7416abaa0c9SPierre Ossman } 7426abaa0c9SPierre Ossman 7436abaa0c9SPierre Ossman /* 7446abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 7456abaa0c9SPierre Ossman */ 7466abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 7476abaa0c9SPierre Ossman { 7486abaa0c9SPierre Ossman BUG_ON(!host); 7496abaa0c9SPierre Ossman BUG_ON(!host->card); 7506abaa0c9SPierre Ossman 7516abaa0c9SPierre Ossman mmc_remove_card(host->card); 7526abaa0c9SPierre Ossman host->card = NULL; 7536abaa0c9SPierre Ossman } 7546abaa0c9SPierre Ossman 7556abaa0c9SPierre Ossman /* 7566abaa0c9SPierre Ossman * Card detection callback from host. 7576abaa0c9SPierre Ossman */ 7586abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 7596abaa0c9SPierre Ossman { 7606abaa0c9SPierre Ossman int err; 7616abaa0c9SPierre Ossman 7626abaa0c9SPierre Ossman BUG_ON(!host); 7636abaa0c9SPierre Ossman BUG_ON(!host->card); 7646abaa0c9SPierre Ossman 7656abaa0c9SPierre Ossman mmc_claim_host(host); 7666abaa0c9SPierre Ossman 7676abaa0c9SPierre Ossman /* 7686abaa0c9SPierre Ossman * Just check if our card has been removed. 7696abaa0c9SPierre Ossman */ 7706abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 7716abaa0c9SPierre Ossman 7727ea239d9SPierre Ossman mmc_release_host(host); 7737ea239d9SPierre Ossman 77417b0429dSPierre Ossman if (err) { 7754101c16aSPierre Ossman mmc_remove(host); 7766abaa0c9SPierre Ossman 7776abaa0c9SPierre Ossman mmc_claim_host(host); 7786abaa0c9SPierre Ossman mmc_detach_bus(host); 7796abaa0c9SPierre Ossman mmc_release_host(host); 7806abaa0c9SPierre Ossman } 7816abaa0c9SPierre Ossman } 7826abaa0c9SPierre Ossman 7836abaa0c9SPierre Ossman /* 7846abaa0c9SPierre Ossman * Suspend callback from host. 7856abaa0c9SPierre Ossman */ 78695cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 7876abaa0c9SPierre Ossman { 7886abaa0c9SPierre Ossman BUG_ON(!host); 7896abaa0c9SPierre Ossman BUG_ON(!host->card); 7906abaa0c9SPierre Ossman 7916abaa0c9SPierre Ossman mmc_claim_host(host); 792af517150SDavid Brownell if (!mmc_host_is_spi(host)) 7936abaa0c9SPierre Ossman mmc_deselect_cards(host); 7946abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 7956abaa0c9SPierre Ossman mmc_release_host(host); 79695cdfb72SNicolas Pitre 79795cdfb72SNicolas Pitre return 0; 7986abaa0c9SPierre Ossman } 7996abaa0c9SPierre Ossman 8006abaa0c9SPierre Ossman /* 8016abaa0c9SPierre Ossman * Resume callback from host. 8026abaa0c9SPierre Ossman * 8036abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 8046abaa0c9SPierre Ossman * and, if so, restore all state to it. 8056abaa0c9SPierre Ossman */ 80695cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 8076abaa0c9SPierre Ossman { 8086abaa0c9SPierre Ossman int err; 8096abaa0c9SPierre Ossman 8106abaa0c9SPierre Ossman BUG_ON(!host); 8116abaa0c9SPierre Ossman BUG_ON(!host->card); 8126abaa0c9SPierre Ossman 8136abaa0c9SPierre Ossman mmc_claim_host(host); 8148c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 8152986d0bfSPierre Ossman mmc_release_host(host); 8162986d0bfSPierre Ossman 81795cdfb72SNicolas Pitre return err; 8186abaa0c9SPierre Ossman } 8196abaa0c9SPierre Ossman 82012ae637fSOhad Ben-Cohen static int mmc_power_restore(struct mmc_host *host) 821eae1aeeeSAdrian Hunter { 82212ae637fSOhad Ben-Cohen int ret; 82312ae637fSOhad Ben-Cohen 824eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 825eae1aeeeSAdrian Hunter mmc_claim_host(host); 82612ae637fSOhad Ben-Cohen ret = mmc_init_card(host, host->ocr, host->card); 827eae1aeeeSAdrian Hunter mmc_release_host(host); 82812ae637fSOhad Ben-Cohen 82912ae637fSOhad Ben-Cohen return ret; 830eae1aeeeSAdrian Hunter } 831eae1aeeeSAdrian Hunter 832b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 833b1ebe384SJarkko Lavinen { 834b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 835b1ebe384SJarkko Lavinen int err = -ENOSYS; 836b1ebe384SJarkko Lavinen 837b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 838b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 839b1ebe384SJarkko Lavinen if (err < 0) 840b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 841b1ebe384SJarkko Lavinen mmc_hostname(host), err); 842b1ebe384SJarkko Lavinen } 843b1ebe384SJarkko Lavinen 844b1ebe384SJarkko Lavinen return err; 845b1ebe384SJarkko Lavinen } 846b1ebe384SJarkko Lavinen 847b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 848b1ebe384SJarkko Lavinen { 849b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 850b1ebe384SJarkko Lavinen int err = -ENOSYS; 851b1ebe384SJarkko Lavinen 852b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 853b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 854b1ebe384SJarkko Lavinen if (err < 0) 855b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 856b1ebe384SJarkko Lavinen mmc_hostname(host), err); 857b1ebe384SJarkko Lavinen } 858b1ebe384SJarkko Lavinen 859b1ebe384SJarkko Lavinen return err; 860b1ebe384SJarkko Lavinen } 861b1ebe384SJarkko Lavinen 8629feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 863b1ebe384SJarkko Lavinen .awake = mmc_awake, 864b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 8659feae246SAdrian Hunter .remove = mmc_remove, 8669feae246SAdrian Hunter .detect = mmc_detect, 8679feae246SAdrian Hunter .suspend = NULL, 8689feae246SAdrian Hunter .resume = NULL, 869eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 8709feae246SAdrian Hunter }; 8719feae246SAdrian Hunter 8729feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 873b1ebe384SJarkko Lavinen .awake = mmc_awake, 874b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 8759feae246SAdrian Hunter .remove = mmc_remove, 8769feae246SAdrian Hunter .detect = mmc_detect, 8779feae246SAdrian Hunter .suspend = mmc_suspend, 8789feae246SAdrian Hunter .resume = mmc_resume, 879eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 8809feae246SAdrian Hunter }; 8819feae246SAdrian Hunter 8829feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 8839feae246SAdrian Hunter { 8849feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 8859feae246SAdrian Hunter 88671d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 8879feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 8889feae246SAdrian Hunter else 8899feae246SAdrian Hunter bus_ops = &mmc_ops; 8909feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 8919feae246SAdrian Hunter } 8929feae246SAdrian Hunter 8936abaa0c9SPierre Ossman /* 8946abaa0c9SPierre Ossman * Starting point for MMC card init. 8956abaa0c9SPierre Ossman */ 896807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 8976abaa0c9SPierre Ossman { 8986abaa0c9SPierre Ossman int err; 899807e8e40SAndy Ross u32 ocr; 9006abaa0c9SPierre Ossman 9016abaa0c9SPierre Ossman BUG_ON(!host); 902d84075c8SPierre Ossman WARN_ON(!host->claimed); 9036abaa0c9SPierre Ossman 904807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 905807e8e40SAndy Ross if (err) 906807e8e40SAndy Ross return err; 907807e8e40SAndy Ross 9089feae246SAdrian Hunter mmc_attach_bus_ops(host); 9098f230f45STakashi Iwai if (host->ocr_avail_mmc) 9108f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 9116abaa0c9SPierre Ossman 9126abaa0c9SPierre Ossman /* 913af517150SDavid Brownell * We need to get OCR a different way for SPI. 914af517150SDavid Brownell */ 915af517150SDavid Brownell if (mmc_host_is_spi(host)) { 916af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 917af517150SDavid Brownell if (err) 918af517150SDavid Brownell goto err; 919af517150SDavid Brownell } 920af517150SDavid Brownell 921af517150SDavid Brownell /* 9226abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 9236abaa0c9SPierre Ossman * support. 9246abaa0c9SPierre Ossman */ 9256abaa0c9SPierre Ossman if (ocr & 0x7F) { 9266abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 9276abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 9286abaa0c9SPierre Ossman mmc_hostname(host)); 9296abaa0c9SPierre Ossman ocr &= ~0x7F; 9306abaa0c9SPierre Ossman } 9316abaa0c9SPierre Ossman 9326abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 9336abaa0c9SPierre Ossman 9346abaa0c9SPierre Ossman /* 9356abaa0c9SPierre Ossman * Can we support the voltage of the card? 9366abaa0c9SPierre Ossman */ 937109b5bedSPierre Ossman if (!host->ocr) { 938109b5bedSPierre Ossman err = -EINVAL; 9396abaa0c9SPierre Ossman goto err; 940109b5bedSPierre Ossman } 9416abaa0c9SPierre Ossman 9426abaa0c9SPierre Ossman /* 9436abaa0c9SPierre Ossman * Detect and init the card. 9446abaa0c9SPierre Ossman */ 9458c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 94617b0429dSPierre Ossman if (err) 9476abaa0c9SPierre Ossman goto err; 9486abaa0c9SPierre Ossman 9496abaa0c9SPierre Ossman mmc_release_host(host); 9504101c16aSPierre Ossman err = mmc_add_card(host->card); 951807e8e40SAndy Ross mmc_claim_host(host); 9527ea239d9SPierre Ossman if (err) 9532986d0bfSPierre Ossman goto remove_card; 9547ea239d9SPierre Ossman 9557ea239d9SPierre Ossman return 0; 9567ea239d9SPierre Ossman 9572986d0bfSPierre Ossman remove_card: 958807e8e40SAndy Ross mmc_release_host(host); 9596abaa0c9SPierre Ossman mmc_remove_card(host->card); 9602986d0bfSPierre Ossman mmc_claim_host(host); 961807e8e40SAndy Ross host->card = NULL; 9627ea239d9SPierre Ossman err: 9637ea239d9SPierre Ossman mmc_detach_bus(host); 9647ea239d9SPierre Ossman 965109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 966109b5bedSPierre Ossman mmc_hostname(host), err); 967109b5bedSPierre Ossman 968adf66a0dSPierre Ossman return err; 9697ea239d9SPierre Ossman } 970