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" 237ea239d9SPierre Ossman 247ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 257ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 267ea239d9SPierre Ossman 0, 0, 0, 0 277ea239d9SPierre Ossman }; 287ea239d9SPierre Ossman 297ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 307ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 317ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 327ea239d9SPierre Ossman }; 337ea239d9SPierre Ossman 347ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 357ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 367ea239d9SPierre Ossman }; 377ea239d9SPierre Ossman 387ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 397ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 407ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 417ea239d9SPierre Ossman }; 427ea239d9SPierre Ossman 437ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 447ea239d9SPierre Ossman ({ \ 457ea239d9SPierre Ossman const int __size = size; \ 467ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 477ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 487ea239d9SPierre Ossman const int __shft = (start) & 31; \ 497ea239d9SPierre Ossman u32 __res; \ 507ea239d9SPierre Ossman \ 517ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 527ea239d9SPierre Ossman if (__size + __shft > 32) \ 537ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 547ea239d9SPierre Ossman __res & __mask; \ 557ea239d9SPierre Ossman }) 567ea239d9SPierre Ossman 577ea239d9SPierre Ossman /* 587ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 597ea239d9SPierre Ossman */ 60bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 617ea239d9SPierre Ossman { 627ea239d9SPierre Ossman u32 *resp = card->raw_cid; 637ea239d9SPierre Ossman 647ea239d9SPierre Ossman /* 657ea239d9SPierre Ossman * The selection of the format here is based upon published 667ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 677ea239d9SPierre Ossman */ 687ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 697ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 707ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 717ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 727ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 737ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 747ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 757ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 767ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 777ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 787ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 797ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 807ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 817ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 827ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 837ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 847ea239d9SPierre Ossman break; 857ea239d9SPierre Ossman 867ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 877ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 887ea239d9SPierre Ossman case 4: /* MMC v4 */ 897ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 907ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 917ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 927ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 937ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 947ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 957ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 967ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 977ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 987ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 997ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1007ea239d9SPierre Ossman break; 1017ea239d9SPierre Ossman 1027ea239d9SPierre Ossman default: 103facba917SPierre Ossman printk(KERN_ERR "%s: card has unknown MMCA version %d\n", 1047ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 105bd766312SPierre Ossman return -EINVAL; 1067ea239d9SPierre Ossman } 107bd766312SPierre Ossman 108bd766312SPierre Ossman return 0; 1097ea239d9SPierre Ossman } 1107ea239d9SPierre Ossman 111dfe86cbaSAdrian Hunter static void mmc_set_erase_size(struct mmc_card *card) 112dfe86cbaSAdrian Hunter { 113dfe86cbaSAdrian Hunter if (card->ext_csd.erase_group_def & 1) 114dfe86cbaSAdrian Hunter card->erase_size = card->ext_csd.hc_erase_size; 115dfe86cbaSAdrian Hunter else 116dfe86cbaSAdrian Hunter card->erase_size = card->csd.erase_size; 117dfe86cbaSAdrian Hunter 118dfe86cbaSAdrian Hunter mmc_init_erase(card); 119dfe86cbaSAdrian Hunter } 120dfe86cbaSAdrian Hunter 1217ea239d9SPierre Ossman /* 1227ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1237ea239d9SPierre Ossman */ 124bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1257ea239d9SPierre Ossman { 1267ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 127dfe86cbaSAdrian Hunter unsigned int e, m, a, b; 1287ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1297ea239d9SPierre Ossman 1307ea239d9SPierre Ossman /* 1317ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1327ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1336da24b78SKyungmin Park * We also support eMMC v4.4 & v4.41. 1347ea239d9SPierre Ossman */ 1356da24b78SKyungmin Park csd->structure = UNSTUFF_BITS(resp, 126, 2); 1366da24b78SKyungmin Park if (csd->structure == 0) { 137facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1386da24b78SKyungmin Park mmc_hostname(card->host), csd->structure); 139bd766312SPierre Ossman return -EINVAL; 1407ea239d9SPierre Ossman } 1417ea239d9SPierre Ossman 1427ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1437ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1447ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1457ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1467ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1477ea239d9SPierre Ossman 1487ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1497ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1507ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1517ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1527ea239d9SPierre Ossman 1537ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1547ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1557ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1567ea239d9SPierre Ossman 1577ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1587ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1597ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1607ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1617ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1627ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1637ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 164bd766312SPierre Ossman 165dfe86cbaSAdrian Hunter if (csd->write_blkbits >= 9) { 166dfe86cbaSAdrian Hunter a = UNSTUFF_BITS(resp, 42, 5); 167dfe86cbaSAdrian Hunter b = UNSTUFF_BITS(resp, 37, 5); 168dfe86cbaSAdrian Hunter csd->erase_size = (a + 1) * (b + 1); 169dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 170dfe86cbaSAdrian Hunter } 171dfe86cbaSAdrian Hunter 172bd766312SPierre Ossman return 0; 1737ea239d9SPierre Ossman } 1747ea239d9SPierre Ossman 1757ea239d9SPierre Ossman /* 17689a73cf5SPierre Ossman * Read and decode extended CSD. 1777ea239d9SPierre Ossman */ 17889a73cf5SPierre Ossman static int mmc_read_ext_csd(struct mmc_card *card) 1797ea239d9SPierre Ossman { 1807ea239d9SPierre Ossman int err; 1817ea239d9SPierre Ossman u8 *ext_csd; 1827ea239d9SPierre Ossman 1837ea239d9SPierre Ossman BUG_ON(!card); 1847ea239d9SPierre Ossman 1857ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 18617b0429dSPierre Ossman return 0; 1877ea239d9SPierre Ossman 1887ea239d9SPierre Ossman /* 1897ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1907ea239d9SPierre Ossman * raw block in mmc_card. 1917ea239d9SPierre Ossman */ 1927ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1937ea239d9SPierre Ossman if (!ext_csd) { 1947ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 195adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 19617b0429dSPierre Ossman return -ENOMEM; 1977ea239d9SPierre Ossman } 1987ea239d9SPierre Ossman 1997ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 20017b0429dSPierre Ossman if (err) { 201d08ebeddSWolfgang Muees /* If the host or the card can't do the switch, 202d08ebeddSWolfgang Muees * fail more gracefully. */ 203d08ebeddSWolfgang Muees if ((err != -EINVAL) 204d08ebeddSWolfgang Muees && (err != -ENOSYS) 205d08ebeddSWolfgang Muees && (err != -EFAULT)) 206adf66a0dSPierre Ossman goto out; 207adf66a0dSPierre Ossman 208adf66a0dSPierre Ossman /* 2097ea239d9SPierre Ossman * High capacity cards should have this "magic" size 2107ea239d9SPierre Ossman * stored in their CSD. 2117ea239d9SPierre Ossman */ 2127ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 2137ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 2147ea239d9SPierre Ossman "on a possible high capacity card. " 2157ea239d9SPierre Ossman "Card will be ignored.\n", 2167ea239d9SPierre Ossman mmc_hostname(card->host)); 2177ea239d9SPierre Ossman } else { 2187ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2197ea239d9SPierre Ossman "EXT_CSD, performance might " 2207ea239d9SPierre Ossman "suffer.\n", 2217ea239d9SPierre Ossman mmc_hostname(card->host)); 22217b0429dSPierre Ossman err = 0; 2237ea239d9SPierre Ossman } 224adf66a0dSPierre Ossman 2257ea239d9SPierre Ossman goto out; 2267ea239d9SPierre Ossman } 2277ea239d9SPierre Ossman 2286da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 2296da24b78SKyungmin Park if (card->csd.structure == 3) { 2306da24b78SKyungmin Park int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE]; 2316da24b78SKyungmin Park if (ext_csd_struct > 2) { 2328fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2338fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 2346da24b78SKyungmin Park ext_csd_struct); 2356da24b78SKyungmin Park err = -EINVAL; 2366da24b78SKyungmin Park goto out; 2376da24b78SKyungmin Park } 2386da24b78SKyungmin Park } 2396da24b78SKyungmin Park 2406da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 2416da24b78SKyungmin Park if (card->ext_csd.rev > 5) { 2426da24b78SKyungmin Park printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n", 2436da24b78SKyungmin Park mmc_hostname(card->host), card->ext_csd.rev); 24400cedfa6SFlorin Malita err = -EINVAL; 24500cedfa6SFlorin Malita goto out; 246d7604d76SPierre Ossman } 247d7604d76SPierre Ossman 248b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2497ea239d9SPierre Ossman card->ext_csd.sectors = 2507ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2517ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2527ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2537ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 254fc8a0985SHanumath Prasad 255fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 256fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 2577ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 258d7604d76SPierre Ossman } 2597ea239d9SPierre Ossman 2607198f3c9SAdrian Hunter switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { 261dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | 262dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 263dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 264dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; 265dfc13e84SHanumath Prasad break; 266dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | 267dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 268dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 269dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; 270dfc13e84SHanumath Prasad break; 271dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | 272dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 273dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 274dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; 275dfc13e84SHanumath Prasad break; 2767ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2777ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2787ea239d9SPierre Ossman break; 2797ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2807ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2817ea239d9SPierre Ossman break; 2827ea239d9SPierre Ossman default: 2837ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2847ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2857ea239d9SPierre Ossman "support any high-speed modes.\n", 2867ea239d9SPierre Ossman mmc_hostname(card->host)); 2877ea239d9SPierre Ossman } 2887ea239d9SPierre Ossman 289b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 290b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 291b1ebe384SJarkko Lavinen 292b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 293b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 294b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 295b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 296dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 297dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 298dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 299dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 300dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 301dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 302b1ebe384SJarkko Lavinen } 303b1ebe384SJarkko Lavinen 304dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 305dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 306dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 307dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 308dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 309dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 310dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 311dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 312dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 313dfe86cbaSAdrian Hunter } 314dfe86cbaSAdrian Hunter 315dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 316dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 317dfe86cbaSAdrian Hunter else 318dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 319dfe86cbaSAdrian Hunter 3207ea239d9SPierre Ossman out: 3217ea239d9SPierre Ossman kfree(ext_csd); 3227ea239d9SPierre Ossman 3237ea239d9SPierre Ossman return err; 3247ea239d9SPierre Ossman } 3257ea239d9SPierre Ossman 32651ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 32751ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 32851ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 32951ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 33051ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 331dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 332dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 33351ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 33451ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 33551ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 33651ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 33751ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 33851ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 33951ec92e2SPierre Ossman 34051ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 34151ec92e2SPierre Ossman &dev_attr_cid.attr, 34251ec92e2SPierre Ossman &dev_attr_csd.attr, 34351ec92e2SPierre Ossman &dev_attr_date.attr, 344dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 345dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 34651ec92e2SPierre Ossman &dev_attr_fwrev.attr, 34751ec92e2SPierre Ossman &dev_attr_hwrev.attr, 34851ec92e2SPierre Ossman &dev_attr_manfid.attr, 34951ec92e2SPierre Ossman &dev_attr_name.attr, 35051ec92e2SPierre Ossman &dev_attr_oemid.attr, 35151ec92e2SPierre Ossman &dev_attr_serial.attr, 35251ec92e2SPierre Ossman NULL, 35351ec92e2SPierre Ossman }; 35451ec92e2SPierre Ossman 35551ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 35651ec92e2SPierre Ossman .attrs = mmc_std_attrs, 35751ec92e2SPierre Ossman }; 35851ec92e2SPierre Ossman 359a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 36051ec92e2SPierre Ossman &mmc_std_attr_group, 36151ec92e2SPierre Ossman NULL, 36251ec92e2SPierre Ossman }; 36351ec92e2SPierre Ossman 36451ec92e2SPierre Ossman static struct device_type mmc_type = { 36551ec92e2SPierre Ossman .groups = mmc_attr_groups, 36651ec92e2SPierre Ossman }; 36751ec92e2SPierre Ossman 3687ea239d9SPierre Ossman /* 3696abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 3706abaa0c9SPierre Ossman * 3718769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 3726abaa0c9SPierre Ossman * we're trying to reinitialise. 3737ea239d9SPierre Ossman */ 3748c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 3756abaa0c9SPierre Ossman struct mmc_card *oldcard) 3767ea239d9SPierre Ossman { 3777ea239d9SPierre Ossman struct mmc_card *card; 37849e3b5a4SAdrian Hunter int err, ddr = MMC_SDR_MODE; 3797ea239d9SPierre Ossman u32 cid[4]; 3807ea239d9SPierre Ossman unsigned int max_dtr; 3817ea239d9SPierre Ossman 3827ea239d9SPierre Ossman BUG_ON(!host); 383d84075c8SPierre Ossman WARN_ON(!host->claimed); 3847ea239d9SPierre Ossman 3857ea239d9SPierre Ossman /* 3867ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 3877ea239d9SPierre Ossman * need to tell some cards to go back to the idle 3887ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 3897ea239d9SPierre Ossman * respond. 3907ea239d9SPierre Ossman */ 3917ea239d9SPierre Ossman mmc_go_idle(host); 3927ea239d9SPierre Ossman 3937ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 3946abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 39517b0429dSPierre Ossman if (err) 3966abaa0c9SPierre Ossman goto err; 3977ea239d9SPierre Ossman 3987ea239d9SPierre Ossman /* 399af517150SDavid Brownell * For SPI, enable CRC as appropriate. 400af517150SDavid Brownell */ 401af517150SDavid Brownell if (mmc_host_is_spi(host)) { 402af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 403af517150SDavid Brownell if (err) 404af517150SDavid Brownell goto err; 405af517150SDavid Brownell } 406af517150SDavid Brownell 407af517150SDavid Brownell /* 4087ea239d9SPierre Ossman * Fetch CID from card. 4097ea239d9SPierre Ossman */ 410af517150SDavid Brownell if (mmc_host_is_spi(host)) 411af517150SDavid Brownell err = mmc_send_cid(host, cid); 412af517150SDavid Brownell else 4137ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 41417b0429dSPierre Ossman if (err) 4157ea239d9SPierre Ossman goto err; 4167ea239d9SPierre Ossman 4176abaa0c9SPierre Ossman if (oldcard) { 418adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 419adf66a0dSPierre Ossman err = -ENOENT; 4206abaa0c9SPierre Ossman goto err; 421adf66a0dSPierre Ossman } 4226abaa0c9SPierre Ossman 4236abaa0c9SPierre Ossman card = oldcard; 4246abaa0c9SPierre Ossman } else { 4257ea239d9SPierre Ossman /* 4267ea239d9SPierre Ossman * Allocate card structure. 4277ea239d9SPierre Ossman */ 42851ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 429adf66a0dSPierre Ossman if (IS_ERR(card)) { 430adf66a0dSPierre Ossman err = PTR_ERR(card); 4317ea239d9SPierre Ossman goto err; 432adf66a0dSPierre Ossman } 4337ea239d9SPierre Ossman 4347ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 4357ea239d9SPierre Ossman card->rca = 1; 4367ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 4376abaa0c9SPierre Ossman } 4387ea239d9SPierre Ossman 4397ea239d9SPierre Ossman /* 440af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 4417ea239d9SPierre Ossman */ 442af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 4437ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 44417b0429dSPierre Ossman if (err) 4457ea239d9SPierre Ossman goto free_card; 4467ea239d9SPierre Ossman 4477ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 448af517150SDavid Brownell } 4497ea239d9SPierre Ossman 4506abaa0c9SPierre Ossman if (!oldcard) { 4517ea239d9SPierre Ossman /* 4527ea239d9SPierre Ossman * Fetch CSD from card. 4537ea239d9SPierre Ossman */ 4547ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 45517b0429dSPierre Ossman if (err) 4567ea239d9SPierre Ossman goto free_card; 4577ea239d9SPierre Ossman 458bd766312SPierre Ossman err = mmc_decode_csd(card); 459adf66a0dSPierre Ossman if (err) 460bd766312SPierre Ossman goto free_card; 461bd766312SPierre Ossman err = mmc_decode_cid(card); 462adf66a0dSPierre Ossman if (err) 463bd766312SPierre Ossman goto free_card; 4646abaa0c9SPierre Ossman } 4657ea239d9SPierre Ossman 4667ea239d9SPierre Ossman /* 46789a73cf5SPierre Ossman * Select card, as all following commands rely on that. 4687ea239d9SPierre Ossman */ 469af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 4707ea239d9SPierre Ossman err = mmc_select_card(card); 47117b0429dSPierre Ossman if (err) 4727ea239d9SPierre Ossman goto free_card; 473af517150SDavid Brownell } 4747ea239d9SPierre Ossman 4756abaa0c9SPierre Ossman if (!oldcard) { 47689a73cf5SPierre Ossman /* 477af517150SDavid Brownell * Fetch and process extended CSD. 47889a73cf5SPierre Ossman */ 47989a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 48017b0429dSPierre Ossman if (err) 4817ea239d9SPierre Ossman goto free_card; 482dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 483dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 4846abaa0c9SPierre Ossman } 4857ea239d9SPierre Ossman 4867ea239d9SPierre Ossman /* 48789a73cf5SPierre Ossman * Activate high speed (if supported) 48889a73cf5SPierre Ossman */ 48989a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 49089a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 49189a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 49289a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 493ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 49489a73cf5SPierre Ossman goto free_card; 49589a73cf5SPierre Ossman 496ef0b27d4SAdrian Hunter if (err) { 497ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to highspeed failed\n", 498ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 499ef0b27d4SAdrian Hunter err = 0; 500ef0b27d4SAdrian Hunter } else { 50189a73cf5SPierre Ossman mmc_card_set_highspeed(card); 50289a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 50389a73cf5SPierre Ossman } 504ef0b27d4SAdrian Hunter } 50589a73cf5SPierre Ossman 50689a73cf5SPierre Ossman /* 5077ea239d9SPierre Ossman * Compute bus speed. 5087ea239d9SPierre Ossman */ 5097ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 5107ea239d9SPierre Ossman 5117ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 5127ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 5137ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 5147ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 5157ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 5167ea239d9SPierre Ossman } 5177ea239d9SPierre Ossman 5187ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 5197ea239d9SPierre Ossman 52089a73cf5SPierre Ossman /* 5210f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 522dfc13e84SHanumath Prasad */ 523dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 524dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 525dfc13e84SHanumath Prasad && (host->caps & (MMC_CAP_1_8V_DDR))) 52649e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 527dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 528dfc13e84SHanumath Prasad && (host->caps & (MMC_CAP_1_2V_DDR))) 52949e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 530dfc13e84SHanumath Prasad } 531dfc13e84SHanumath Prasad 532dfc13e84SHanumath Prasad /* 5330f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 53489a73cf5SPierre Ossman */ 53589a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 536b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 537b30f8af3SJarkko Lavinen unsigned ext_csd_bit, bus_width; 538b30f8af3SJarkko Lavinen 539b30f8af3SJarkko Lavinen if (host->caps & MMC_CAP_8_BIT_DATA) { 5400f8d8ea6SAdrian Hunter if (ddr) 541dfc13e84SHanumath Prasad ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_8; 542dfc13e84SHanumath Prasad else 543b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_8; 544b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_8; 545b30f8af3SJarkko Lavinen } else { 5460f8d8ea6SAdrian Hunter if (ddr) 547dfc13e84SHanumath Prasad ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_4; 548dfc13e84SHanumath Prasad else 549b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_4; 550b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_4; 551b30f8af3SJarkko Lavinen } 552b30f8af3SJarkko Lavinen 55389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 554b30f8af3SJarkko Lavinen EXT_CSD_BUS_WIDTH, ext_csd_bit); 555b30f8af3SJarkko Lavinen 556ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 55789a73cf5SPierre Ossman goto free_card; 55889a73cf5SPierre Ossman 559ef0b27d4SAdrian Hunter if (err) { 5600f8d8ea6SAdrian Hunter printk(KERN_WARNING "%s: switch to bus width %d ddr %d " 561ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 5620f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 563ef0b27d4SAdrian Hunter err = 0; 564ef0b27d4SAdrian Hunter } else { 5650f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 5660f8d8ea6SAdrian Hunter mmc_set_bus_width_ddr(card->host, bus_width, ddr); 56789a73cf5SPierre Ossman } 568ef0b27d4SAdrian Hunter } 56989a73cf5SPierre Ossman 5706abaa0c9SPierre Ossman if (!oldcard) 5717ea239d9SPierre Ossman host->card = card; 5727ea239d9SPierre Ossman 57317b0429dSPierre Ossman return 0; 5746abaa0c9SPierre Ossman 5756abaa0c9SPierre Ossman free_card: 5766abaa0c9SPierre Ossman if (!oldcard) 5776abaa0c9SPierre Ossman mmc_remove_card(card); 5786abaa0c9SPierre Ossman err: 5796abaa0c9SPierre Ossman 580adf66a0dSPierre Ossman return err; 5816abaa0c9SPierre Ossman } 5826abaa0c9SPierre Ossman 5836abaa0c9SPierre Ossman /* 5846abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 5856abaa0c9SPierre Ossman */ 5866abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 5876abaa0c9SPierre Ossman { 5886abaa0c9SPierre Ossman BUG_ON(!host); 5896abaa0c9SPierre Ossman BUG_ON(!host->card); 5906abaa0c9SPierre Ossman 5916abaa0c9SPierre Ossman mmc_remove_card(host->card); 5926abaa0c9SPierre Ossman host->card = NULL; 5936abaa0c9SPierre Ossman } 5946abaa0c9SPierre Ossman 5956abaa0c9SPierre Ossman /* 5966abaa0c9SPierre Ossman * Card detection callback from host. 5976abaa0c9SPierre Ossman */ 5986abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 5996abaa0c9SPierre Ossman { 6006abaa0c9SPierre Ossman int err; 6016abaa0c9SPierre Ossman 6026abaa0c9SPierre Ossman BUG_ON(!host); 6036abaa0c9SPierre Ossman BUG_ON(!host->card); 6046abaa0c9SPierre Ossman 6056abaa0c9SPierre Ossman mmc_claim_host(host); 6066abaa0c9SPierre Ossman 6076abaa0c9SPierre Ossman /* 6086abaa0c9SPierre Ossman * Just check if our card has been removed. 6096abaa0c9SPierre Ossman */ 6106abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 6116abaa0c9SPierre Ossman 6127ea239d9SPierre Ossman mmc_release_host(host); 6137ea239d9SPierre Ossman 61417b0429dSPierre Ossman if (err) { 6154101c16aSPierre Ossman mmc_remove(host); 6166abaa0c9SPierre Ossman 6176abaa0c9SPierre Ossman mmc_claim_host(host); 6186abaa0c9SPierre Ossman mmc_detach_bus(host); 6196abaa0c9SPierre Ossman mmc_release_host(host); 6206abaa0c9SPierre Ossman } 6216abaa0c9SPierre Ossman } 6226abaa0c9SPierre Ossman 6236abaa0c9SPierre Ossman /* 6246abaa0c9SPierre Ossman * Suspend callback from host. 6256abaa0c9SPierre Ossman */ 62695cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 6276abaa0c9SPierre Ossman { 6286abaa0c9SPierre Ossman BUG_ON(!host); 6296abaa0c9SPierre Ossman BUG_ON(!host->card); 6306abaa0c9SPierre Ossman 6316abaa0c9SPierre Ossman mmc_claim_host(host); 632af517150SDavid Brownell if (!mmc_host_is_spi(host)) 6336abaa0c9SPierre Ossman mmc_deselect_cards(host); 6346abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 6356abaa0c9SPierre Ossman mmc_release_host(host); 63695cdfb72SNicolas Pitre 63795cdfb72SNicolas Pitre return 0; 6386abaa0c9SPierre Ossman } 6396abaa0c9SPierre Ossman 6406abaa0c9SPierre Ossman /* 6416abaa0c9SPierre Ossman * Resume callback from host. 6426abaa0c9SPierre Ossman * 6436abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 6446abaa0c9SPierre Ossman * and, if so, restore all state to it. 6456abaa0c9SPierre Ossman */ 64695cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 6476abaa0c9SPierre Ossman { 6486abaa0c9SPierre Ossman int err; 6496abaa0c9SPierre Ossman 6506abaa0c9SPierre Ossman BUG_ON(!host); 6516abaa0c9SPierre Ossman BUG_ON(!host->card); 6526abaa0c9SPierre Ossman 6536abaa0c9SPierre Ossman mmc_claim_host(host); 6548c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 6552986d0bfSPierre Ossman mmc_release_host(host); 6562986d0bfSPierre Ossman 65795cdfb72SNicolas Pitre return err; 6586abaa0c9SPierre Ossman } 6596abaa0c9SPierre Ossman 660eae1aeeeSAdrian Hunter static void mmc_power_restore(struct mmc_host *host) 661eae1aeeeSAdrian Hunter { 662eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 663eae1aeeeSAdrian Hunter mmc_claim_host(host); 664eae1aeeeSAdrian Hunter mmc_init_card(host, host->ocr, host->card); 665eae1aeeeSAdrian Hunter mmc_release_host(host); 666eae1aeeeSAdrian Hunter } 667eae1aeeeSAdrian Hunter 668b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 669b1ebe384SJarkko Lavinen { 670b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 671b1ebe384SJarkko Lavinen int err = -ENOSYS; 672b1ebe384SJarkko Lavinen 673b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 674b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 675b1ebe384SJarkko Lavinen if (err < 0) 676b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 677b1ebe384SJarkko Lavinen mmc_hostname(host), err); 678b1ebe384SJarkko Lavinen } 679b1ebe384SJarkko Lavinen 680b1ebe384SJarkko Lavinen return err; 681b1ebe384SJarkko Lavinen } 682b1ebe384SJarkko Lavinen 683b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 684b1ebe384SJarkko Lavinen { 685b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 686b1ebe384SJarkko Lavinen int err = -ENOSYS; 687b1ebe384SJarkko Lavinen 688b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 689b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 690b1ebe384SJarkko Lavinen if (err < 0) 691b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 692b1ebe384SJarkko Lavinen mmc_hostname(host), err); 693b1ebe384SJarkko Lavinen } 694b1ebe384SJarkko Lavinen 695b1ebe384SJarkko Lavinen return err; 696b1ebe384SJarkko Lavinen } 697b1ebe384SJarkko Lavinen 6989feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 699b1ebe384SJarkko Lavinen .awake = mmc_awake, 700b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 7019feae246SAdrian Hunter .remove = mmc_remove, 7029feae246SAdrian Hunter .detect = mmc_detect, 7039feae246SAdrian Hunter .suspend = NULL, 7049feae246SAdrian Hunter .resume = NULL, 705eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 7069feae246SAdrian Hunter }; 7079feae246SAdrian Hunter 7089feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 709b1ebe384SJarkko Lavinen .awake = mmc_awake, 710b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 7119feae246SAdrian Hunter .remove = mmc_remove, 7129feae246SAdrian Hunter .detect = mmc_detect, 7139feae246SAdrian Hunter .suspend = mmc_suspend, 7149feae246SAdrian Hunter .resume = mmc_resume, 715eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 7169feae246SAdrian Hunter }; 7179feae246SAdrian Hunter 7189feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 7199feae246SAdrian Hunter { 7209feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 7219feae246SAdrian Hunter 72271d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 7239feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 7249feae246SAdrian Hunter else 7259feae246SAdrian Hunter bus_ops = &mmc_ops; 7269feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 7279feae246SAdrian Hunter } 7289feae246SAdrian Hunter 7296abaa0c9SPierre Ossman /* 7306abaa0c9SPierre Ossman * Starting point for MMC card init. 7316abaa0c9SPierre Ossman */ 7326abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 7336abaa0c9SPierre Ossman { 7346abaa0c9SPierre Ossman int err; 7356abaa0c9SPierre Ossman 7366abaa0c9SPierre Ossman BUG_ON(!host); 737d84075c8SPierre Ossman WARN_ON(!host->claimed); 7386abaa0c9SPierre Ossman 7399feae246SAdrian Hunter mmc_attach_bus_ops(host); 7406abaa0c9SPierre Ossman 7416abaa0c9SPierre Ossman /* 742af517150SDavid Brownell * We need to get OCR a different way for SPI. 743af517150SDavid Brownell */ 744af517150SDavid Brownell if (mmc_host_is_spi(host)) { 745af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 746af517150SDavid Brownell if (err) 747af517150SDavid Brownell goto err; 748af517150SDavid Brownell } 749af517150SDavid Brownell 750af517150SDavid Brownell /* 7516abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 7526abaa0c9SPierre Ossman * support. 7536abaa0c9SPierre Ossman */ 7546abaa0c9SPierre Ossman if (ocr & 0x7F) { 7556abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 7566abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 7576abaa0c9SPierre Ossman mmc_hostname(host)); 7586abaa0c9SPierre Ossman ocr &= ~0x7F; 7596abaa0c9SPierre Ossman } 7606abaa0c9SPierre Ossman 7616abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 7626abaa0c9SPierre Ossman 7636abaa0c9SPierre Ossman /* 7646abaa0c9SPierre Ossman * Can we support the voltage of the card? 7656abaa0c9SPierre Ossman */ 766109b5bedSPierre Ossman if (!host->ocr) { 767109b5bedSPierre Ossman err = -EINVAL; 7686abaa0c9SPierre Ossman goto err; 769109b5bedSPierre Ossman } 7706abaa0c9SPierre Ossman 7716abaa0c9SPierre Ossman /* 7726abaa0c9SPierre Ossman * Detect and init the card. 7736abaa0c9SPierre Ossman */ 7748c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 77517b0429dSPierre Ossman if (err) 7766abaa0c9SPierre Ossman goto err; 7776abaa0c9SPierre Ossman 7786abaa0c9SPierre Ossman mmc_release_host(host); 7796abaa0c9SPierre Ossman 7804101c16aSPierre Ossman err = mmc_add_card(host->card); 7817ea239d9SPierre Ossman if (err) 7822986d0bfSPierre Ossman goto remove_card; 7837ea239d9SPierre Ossman 7847ea239d9SPierre Ossman return 0; 7857ea239d9SPierre Ossman 7862986d0bfSPierre Ossman remove_card: 7876abaa0c9SPierre Ossman mmc_remove_card(host->card); 7887ea239d9SPierre Ossman host->card = NULL; 7892986d0bfSPierre Ossman mmc_claim_host(host); 7907ea239d9SPierre Ossman err: 7917ea239d9SPierre Ossman mmc_detach_bus(host); 7927ea239d9SPierre Ossman mmc_release_host(host); 7937ea239d9SPierre Ossman 794109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 795109b5bedSPierre Ossman mmc_hostname(host), err); 796109b5bedSPierre Ossman 797adf66a0dSPierre Ossman return err; 7987ea239d9SPierre Ossman } 799