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) { 305709de99dSChuanxiao Dong /* 306709de99dSChuanxiao Dong * Enhanced area feature support -- check whether the eMMC 307709de99dSChuanxiao Dong * card has the Enhanced area enabled. If so, export enhanced 308709de99dSChuanxiao Dong * area offset and size to user by adding sysfs interface. 309709de99dSChuanxiao Dong */ 310709de99dSChuanxiao Dong if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 311709de99dSChuanxiao Dong (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 312709de99dSChuanxiao Dong u8 hc_erase_grp_sz = 313709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 314709de99dSChuanxiao Dong u8 hc_wp_grp_sz = 315709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 316709de99dSChuanxiao Dong 317709de99dSChuanxiao Dong card->ext_csd.enhanced_area_en = 1; 318709de99dSChuanxiao Dong /* 319709de99dSChuanxiao Dong * calculate the enhanced data area offset, in bytes 320709de99dSChuanxiao Dong */ 321709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = 322709de99dSChuanxiao Dong (ext_csd[139] << 24) + (ext_csd[138] << 16) + 323709de99dSChuanxiao Dong (ext_csd[137] << 8) + ext_csd[136]; 324709de99dSChuanxiao Dong if (mmc_card_blockaddr(card)) 325709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset <<= 9; 326709de99dSChuanxiao Dong /* 327709de99dSChuanxiao Dong * calculate the enhanced data area size, in kilobytes 328709de99dSChuanxiao Dong */ 329709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = 330709de99dSChuanxiao Dong (ext_csd[142] << 16) + (ext_csd[141] << 8) + 331709de99dSChuanxiao Dong ext_csd[140]; 332709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size *= 333709de99dSChuanxiao Dong (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 334709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size <<= 9; 335709de99dSChuanxiao Dong } else { 336709de99dSChuanxiao Dong /* 337709de99dSChuanxiao Dong * If the enhanced area is not enabled, disable these 338709de99dSChuanxiao Dong * device attributes. 339709de99dSChuanxiao Dong */ 340709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 341709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 342709de99dSChuanxiao Dong } 343dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 344dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 345dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 346dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 347dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 348dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 349dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 350dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 351dfe86cbaSAdrian Hunter } 352dfe86cbaSAdrian Hunter 353dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 354dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 355dfe86cbaSAdrian Hunter else 356dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 357dfe86cbaSAdrian Hunter 3587ea239d9SPierre Ossman out: 3597ea239d9SPierre Ossman kfree(ext_csd); 3607ea239d9SPierre Ossman 3617ea239d9SPierre Ossman return err; 3627ea239d9SPierre Ossman } 3637ea239d9SPierre Ossman 36451ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 36551ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 36651ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 36751ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 36851ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 369dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 370dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 37151ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 37251ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 37351ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 37451ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 37551ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 37651ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 377709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 378709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 379709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 38051ec92e2SPierre Ossman 38151ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 38251ec92e2SPierre Ossman &dev_attr_cid.attr, 38351ec92e2SPierre Ossman &dev_attr_csd.attr, 38451ec92e2SPierre Ossman &dev_attr_date.attr, 385dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 386dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 38751ec92e2SPierre Ossman &dev_attr_fwrev.attr, 38851ec92e2SPierre Ossman &dev_attr_hwrev.attr, 38951ec92e2SPierre Ossman &dev_attr_manfid.attr, 39051ec92e2SPierre Ossman &dev_attr_name.attr, 39151ec92e2SPierre Ossman &dev_attr_oemid.attr, 39251ec92e2SPierre Ossman &dev_attr_serial.attr, 393709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 394709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 39551ec92e2SPierre Ossman NULL, 39651ec92e2SPierre Ossman }; 39751ec92e2SPierre Ossman 39851ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 39951ec92e2SPierre Ossman .attrs = mmc_std_attrs, 40051ec92e2SPierre Ossman }; 40151ec92e2SPierre Ossman 402a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 40351ec92e2SPierre Ossman &mmc_std_attr_group, 40451ec92e2SPierre Ossman NULL, 40551ec92e2SPierre Ossman }; 40651ec92e2SPierre Ossman 40751ec92e2SPierre Ossman static struct device_type mmc_type = { 40851ec92e2SPierre Ossman .groups = mmc_attr_groups, 40951ec92e2SPierre Ossman }; 41051ec92e2SPierre Ossman 4117ea239d9SPierre Ossman /* 4126abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 4136abaa0c9SPierre Ossman * 4148769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 4156abaa0c9SPierre Ossman * we're trying to reinitialise. 4167ea239d9SPierre Ossman */ 4178c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 4186abaa0c9SPierre Ossman struct mmc_card *oldcard) 4197ea239d9SPierre Ossman { 4207ea239d9SPierre Ossman struct mmc_card *card; 42125d5c699SPhilip Rakity int err, ddr = 0; 4227ea239d9SPierre Ossman u32 cid[4]; 4237ea239d9SPierre Ossman unsigned int max_dtr; 4247ea239d9SPierre Ossman 4257ea239d9SPierre Ossman BUG_ON(!host); 426d84075c8SPierre Ossman WARN_ON(!host->claimed); 4277ea239d9SPierre Ossman 4287ea239d9SPierre Ossman /* 4297ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 4307ea239d9SPierre Ossman * need to tell some cards to go back to the idle 4317ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 4327ea239d9SPierre Ossman * respond. 4337ea239d9SPierre Ossman */ 4347ea239d9SPierre Ossman mmc_go_idle(host); 4357ea239d9SPierre Ossman 4367ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 4376abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 43817b0429dSPierre Ossman if (err) 4396abaa0c9SPierre Ossman goto err; 4407ea239d9SPierre Ossman 4417ea239d9SPierre Ossman /* 442af517150SDavid Brownell * For SPI, enable CRC as appropriate. 443af517150SDavid Brownell */ 444af517150SDavid Brownell if (mmc_host_is_spi(host)) { 445af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 446af517150SDavid Brownell if (err) 447af517150SDavid Brownell goto err; 448af517150SDavid Brownell } 449af517150SDavid Brownell 450af517150SDavid Brownell /* 4517ea239d9SPierre Ossman * Fetch CID from card. 4527ea239d9SPierre Ossman */ 453af517150SDavid Brownell if (mmc_host_is_spi(host)) 454af517150SDavid Brownell err = mmc_send_cid(host, cid); 455af517150SDavid Brownell else 4567ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 45717b0429dSPierre Ossman if (err) 4587ea239d9SPierre Ossman goto err; 4597ea239d9SPierre Ossman 4606abaa0c9SPierre Ossman if (oldcard) { 461adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 462adf66a0dSPierre Ossman err = -ENOENT; 4636abaa0c9SPierre Ossman goto err; 464adf66a0dSPierre Ossman } 4656abaa0c9SPierre Ossman 4666abaa0c9SPierre Ossman card = oldcard; 4676abaa0c9SPierre Ossman } else { 4687ea239d9SPierre Ossman /* 4697ea239d9SPierre Ossman * Allocate card structure. 4707ea239d9SPierre Ossman */ 47151ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 472adf66a0dSPierre Ossman if (IS_ERR(card)) { 473adf66a0dSPierre Ossman err = PTR_ERR(card); 4747ea239d9SPierre Ossman goto err; 475adf66a0dSPierre Ossman } 4767ea239d9SPierre Ossman 4777ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 4787ea239d9SPierre Ossman card->rca = 1; 4797ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 4806abaa0c9SPierre Ossman } 4817ea239d9SPierre Ossman 4827ea239d9SPierre Ossman /* 483af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 4847ea239d9SPierre Ossman */ 485af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 4867ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 48717b0429dSPierre Ossman if (err) 4887ea239d9SPierre Ossman goto free_card; 4897ea239d9SPierre Ossman 4907ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 491af517150SDavid Brownell } 4927ea239d9SPierre Ossman 4936abaa0c9SPierre Ossman if (!oldcard) { 4947ea239d9SPierre Ossman /* 4957ea239d9SPierre Ossman * Fetch CSD from card. 4967ea239d9SPierre Ossman */ 4977ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 49817b0429dSPierre Ossman if (err) 4997ea239d9SPierre Ossman goto free_card; 5007ea239d9SPierre Ossman 501bd766312SPierre Ossman err = mmc_decode_csd(card); 502adf66a0dSPierre Ossman if (err) 503bd766312SPierre Ossman goto free_card; 504bd766312SPierre Ossman err = mmc_decode_cid(card); 505adf66a0dSPierre Ossman if (err) 506bd766312SPierre Ossman goto free_card; 5076abaa0c9SPierre Ossman } 5087ea239d9SPierre Ossman 5097ea239d9SPierre Ossman /* 51089a73cf5SPierre Ossman * Select card, as all following commands rely on that. 5117ea239d9SPierre Ossman */ 512af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 5137ea239d9SPierre Ossman err = mmc_select_card(card); 51417b0429dSPierre Ossman if (err) 5157ea239d9SPierre Ossman goto free_card; 516af517150SDavid Brownell } 5177ea239d9SPierre Ossman 5186abaa0c9SPierre Ossman if (!oldcard) { 51989a73cf5SPierre Ossman /* 520af517150SDavid Brownell * Fetch and process extended CSD. 52189a73cf5SPierre Ossman */ 52289a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 52317b0429dSPierre Ossman if (err) 5247ea239d9SPierre Ossman goto free_card; 525dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 526dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 5276abaa0c9SPierre Ossman } 5287ea239d9SPierre Ossman 5297ea239d9SPierre Ossman /* 530709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 531709de99dSChuanxiao Dong * bit. This bit will be lost everytime after a reset or power off. 532709de99dSChuanxiao Dong */ 533709de99dSChuanxiao Dong if (card->ext_csd.enhanced_area_en) { 534709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 535709de99dSChuanxiao Dong EXT_CSD_ERASE_GROUP_DEF, 1); 536709de99dSChuanxiao Dong 537709de99dSChuanxiao Dong if (err && err != -EBADMSG) 538709de99dSChuanxiao Dong goto free_card; 539709de99dSChuanxiao Dong 540709de99dSChuanxiao Dong if (err) { 541709de99dSChuanxiao Dong err = 0; 542709de99dSChuanxiao Dong /* 543709de99dSChuanxiao Dong * Just disable enhanced area off & sz 544709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 545709de99dSChuanxiao Dong * during next time reinit 546709de99dSChuanxiao Dong */ 547709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 548709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 549709de99dSChuanxiao Dong } else { 550709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 551709de99dSChuanxiao Dong /* 552709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 553709de99dSChuanxiao Dong * This will affect the erase size, so 554709de99dSChuanxiao Dong * here need to reset erase size 555709de99dSChuanxiao Dong */ 556709de99dSChuanxiao Dong mmc_set_erase_size(card); 557709de99dSChuanxiao Dong } 558709de99dSChuanxiao Dong } 559709de99dSChuanxiao Dong 560709de99dSChuanxiao Dong /* 56189a73cf5SPierre Ossman * Activate high speed (if supported) 56289a73cf5SPierre Ossman */ 56389a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 56489a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 56589a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 56689a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 567ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 56889a73cf5SPierre Ossman goto free_card; 56989a73cf5SPierre Ossman 570ef0b27d4SAdrian Hunter if (err) { 571ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to highspeed failed\n", 572ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 573ef0b27d4SAdrian Hunter err = 0; 574ef0b27d4SAdrian Hunter } else { 57589a73cf5SPierre Ossman mmc_card_set_highspeed(card); 57689a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 57789a73cf5SPierre Ossman } 578ef0b27d4SAdrian Hunter } 57989a73cf5SPierre Ossman 58089a73cf5SPierre Ossman /* 5817ea239d9SPierre Ossman * Compute bus speed. 5827ea239d9SPierre Ossman */ 5837ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 5847ea239d9SPierre Ossman 5857ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 5867ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 5877ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 5887ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 5897ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 5907ea239d9SPierre Ossman } 5917ea239d9SPierre Ossman 5927ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 5937ea239d9SPierre Ossman 59489a73cf5SPierre Ossman /* 5950f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 596dfc13e84SHanumath Prasad */ 597dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 598dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 599dfc13e84SHanumath Prasad && (host->caps & (MMC_CAP_1_8V_DDR))) 60049e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 601dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 602dfc13e84SHanumath Prasad && (host->caps & (MMC_CAP_1_2V_DDR))) 60349e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 604dfc13e84SHanumath Prasad } 605dfc13e84SHanumath Prasad 606dfc13e84SHanumath Prasad /* 6070f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 60889a73cf5SPierre Ossman */ 60989a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 610b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 61122113efdSAries Lee static unsigned ext_csd_bits[][2] = { 61222113efdSAries Lee { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, 61322113efdSAries Lee { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, 61422113efdSAries Lee { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, 61522113efdSAries Lee }; 61622113efdSAries Lee static unsigned bus_widths[] = { 61722113efdSAries Lee MMC_BUS_WIDTH_8, 61822113efdSAries Lee MMC_BUS_WIDTH_4, 61922113efdSAries Lee MMC_BUS_WIDTH_1 62022113efdSAries Lee }; 62122113efdSAries Lee unsigned idx, bus_width = 0; 622b30f8af3SJarkko Lavinen 62322113efdSAries Lee if (host->caps & MMC_CAP_8_BIT_DATA) 62422113efdSAries Lee idx = 0; 625dfc13e84SHanumath Prasad else 62622113efdSAries Lee idx = 1; 62722113efdSAries Lee for (; idx < ARRAY_SIZE(bus_widths); idx++) { 62822113efdSAries Lee bus_width = bus_widths[idx]; 62922113efdSAries Lee if (bus_width == MMC_BUS_WIDTH_1) 63022113efdSAries Lee ddr = 0; /* no DDR for 1-bit width */ 63122113efdSAries Lee err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 63222113efdSAries Lee EXT_CSD_BUS_WIDTH, 63322113efdSAries Lee ext_csd_bits[idx][0]); 63422113efdSAries Lee if (!err) { 63508c82dfaSTakashi Iwai mmc_set_bus_width_ddr(card->host, 63608c82dfaSTakashi Iwai bus_width, MMC_SDR_MODE); 63722113efdSAries Lee /* 63822113efdSAries Lee * If controller can't handle bus width test, 63922113efdSAries Lee * use the highest bus width to maintain 64022113efdSAries Lee * compatibility with previous MMC behavior. 64122113efdSAries Lee */ 64222113efdSAries Lee if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 64322113efdSAries Lee break; 64422113efdSAries Lee err = mmc_bus_test(card, bus_width); 64522113efdSAries Lee if (!err) 64622113efdSAries Lee break; 64722113efdSAries Lee } 648b30f8af3SJarkko Lavinen } 649b30f8af3SJarkko Lavinen 65022113efdSAries Lee if (!err && ddr) { 65189a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 65222113efdSAries Lee EXT_CSD_BUS_WIDTH, 65322113efdSAries Lee ext_csd_bits[idx][1]); 65422113efdSAries Lee } 655ef0b27d4SAdrian Hunter if (err) { 6560f8d8ea6SAdrian Hunter printk(KERN_WARNING "%s: switch to bus width %d ddr %d " 657ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 6580f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 65922113efdSAries Lee goto free_card; 66022113efdSAries Lee } else if (ddr) { 6610f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 6620f8d8ea6SAdrian Hunter mmc_set_bus_width_ddr(card->host, bus_width, ddr); 66389a73cf5SPierre Ossman } 664ef0b27d4SAdrian Hunter } 66589a73cf5SPierre Ossman 6666abaa0c9SPierre Ossman if (!oldcard) 6677ea239d9SPierre Ossman host->card = card; 6687ea239d9SPierre Ossman 66917b0429dSPierre Ossman return 0; 6706abaa0c9SPierre Ossman 6716abaa0c9SPierre Ossman free_card: 6726abaa0c9SPierre Ossman if (!oldcard) 6736abaa0c9SPierre Ossman mmc_remove_card(card); 6746abaa0c9SPierre Ossman err: 6756abaa0c9SPierre Ossman 676adf66a0dSPierre Ossman return err; 6776abaa0c9SPierre Ossman } 6786abaa0c9SPierre Ossman 6796abaa0c9SPierre Ossman /* 6806abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 6816abaa0c9SPierre Ossman */ 6826abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 6836abaa0c9SPierre Ossman { 6846abaa0c9SPierre Ossman BUG_ON(!host); 6856abaa0c9SPierre Ossman BUG_ON(!host->card); 6866abaa0c9SPierre Ossman 6876abaa0c9SPierre Ossman mmc_remove_card(host->card); 6886abaa0c9SPierre Ossman host->card = NULL; 6896abaa0c9SPierre Ossman } 6906abaa0c9SPierre Ossman 6916abaa0c9SPierre Ossman /* 6926abaa0c9SPierre Ossman * Card detection callback from host. 6936abaa0c9SPierre Ossman */ 6946abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 6956abaa0c9SPierre Ossman { 6966abaa0c9SPierre Ossman int err; 6976abaa0c9SPierre Ossman 6986abaa0c9SPierre Ossman BUG_ON(!host); 6996abaa0c9SPierre Ossman BUG_ON(!host->card); 7006abaa0c9SPierre Ossman 7016abaa0c9SPierre Ossman mmc_claim_host(host); 7026abaa0c9SPierre Ossman 7036abaa0c9SPierre Ossman /* 7046abaa0c9SPierre Ossman * Just check if our card has been removed. 7056abaa0c9SPierre Ossman */ 7066abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 7076abaa0c9SPierre Ossman 7087ea239d9SPierre Ossman mmc_release_host(host); 7097ea239d9SPierre Ossman 71017b0429dSPierre Ossman if (err) { 7114101c16aSPierre Ossman mmc_remove(host); 7126abaa0c9SPierre Ossman 7136abaa0c9SPierre Ossman mmc_claim_host(host); 7146abaa0c9SPierre Ossman mmc_detach_bus(host); 7156abaa0c9SPierre Ossman mmc_release_host(host); 7166abaa0c9SPierre Ossman } 7176abaa0c9SPierre Ossman } 7186abaa0c9SPierre Ossman 7196abaa0c9SPierre Ossman /* 7206abaa0c9SPierre Ossman * Suspend callback from host. 7216abaa0c9SPierre Ossman */ 72295cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 7236abaa0c9SPierre Ossman { 7246abaa0c9SPierre Ossman BUG_ON(!host); 7256abaa0c9SPierre Ossman BUG_ON(!host->card); 7266abaa0c9SPierre Ossman 7276abaa0c9SPierre Ossman mmc_claim_host(host); 728af517150SDavid Brownell if (!mmc_host_is_spi(host)) 7296abaa0c9SPierre Ossman mmc_deselect_cards(host); 7306abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 7316abaa0c9SPierre Ossman mmc_release_host(host); 73295cdfb72SNicolas Pitre 73395cdfb72SNicolas Pitre return 0; 7346abaa0c9SPierre Ossman } 7356abaa0c9SPierre Ossman 7366abaa0c9SPierre Ossman /* 7376abaa0c9SPierre Ossman * Resume callback from host. 7386abaa0c9SPierre Ossman * 7396abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 7406abaa0c9SPierre Ossman * and, if so, restore all state to it. 7416abaa0c9SPierre Ossman */ 74295cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 7436abaa0c9SPierre Ossman { 7446abaa0c9SPierre Ossman int err; 7456abaa0c9SPierre Ossman 7466abaa0c9SPierre Ossman BUG_ON(!host); 7476abaa0c9SPierre Ossman BUG_ON(!host->card); 7486abaa0c9SPierre Ossman 7496abaa0c9SPierre Ossman mmc_claim_host(host); 7508c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 7512986d0bfSPierre Ossman mmc_release_host(host); 7522986d0bfSPierre Ossman 75395cdfb72SNicolas Pitre return err; 7546abaa0c9SPierre Ossman } 7556abaa0c9SPierre Ossman 75612ae637fSOhad Ben-Cohen static int mmc_power_restore(struct mmc_host *host) 757eae1aeeeSAdrian Hunter { 75812ae637fSOhad Ben-Cohen int ret; 75912ae637fSOhad Ben-Cohen 760eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 761eae1aeeeSAdrian Hunter mmc_claim_host(host); 76212ae637fSOhad Ben-Cohen ret = mmc_init_card(host, host->ocr, host->card); 763eae1aeeeSAdrian Hunter mmc_release_host(host); 76412ae637fSOhad Ben-Cohen 76512ae637fSOhad Ben-Cohen return ret; 766eae1aeeeSAdrian Hunter } 767eae1aeeeSAdrian Hunter 768b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 769b1ebe384SJarkko Lavinen { 770b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 771b1ebe384SJarkko Lavinen int err = -ENOSYS; 772b1ebe384SJarkko Lavinen 773b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 774b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 775b1ebe384SJarkko Lavinen if (err < 0) 776b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 777b1ebe384SJarkko Lavinen mmc_hostname(host), err); 778b1ebe384SJarkko Lavinen } 779b1ebe384SJarkko Lavinen 780b1ebe384SJarkko Lavinen return err; 781b1ebe384SJarkko Lavinen } 782b1ebe384SJarkko Lavinen 783b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 784b1ebe384SJarkko Lavinen { 785b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 786b1ebe384SJarkko Lavinen int err = -ENOSYS; 787b1ebe384SJarkko Lavinen 788b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 789b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 790b1ebe384SJarkko Lavinen if (err < 0) 791b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 792b1ebe384SJarkko Lavinen mmc_hostname(host), err); 793b1ebe384SJarkko Lavinen } 794b1ebe384SJarkko Lavinen 795b1ebe384SJarkko Lavinen return err; 796b1ebe384SJarkko Lavinen } 797b1ebe384SJarkko Lavinen 7989feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 799b1ebe384SJarkko Lavinen .awake = mmc_awake, 800b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 8019feae246SAdrian Hunter .remove = mmc_remove, 8029feae246SAdrian Hunter .detect = mmc_detect, 8039feae246SAdrian Hunter .suspend = NULL, 8049feae246SAdrian Hunter .resume = NULL, 805eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 8069feae246SAdrian Hunter }; 8079feae246SAdrian Hunter 8089feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 809b1ebe384SJarkko Lavinen .awake = mmc_awake, 810b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 8119feae246SAdrian Hunter .remove = mmc_remove, 8129feae246SAdrian Hunter .detect = mmc_detect, 8139feae246SAdrian Hunter .suspend = mmc_suspend, 8149feae246SAdrian Hunter .resume = mmc_resume, 815eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 8169feae246SAdrian Hunter }; 8179feae246SAdrian Hunter 8189feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 8199feae246SAdrian Hunter { 8209feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 8219feae246SAdrian Hunter 82271d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 8239feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 8249feae246SAdrian Hunter else 8259feae246SAdrian Hunter bus_ops = &mmc_ops; 8269feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 8279feae246SAdrian Hunter } 8289feae246SAdrian Hunter 8296abaa0c9SPierre Ossman /* 8306abaa0c9SPierre Ossman * Starting point for MMC card init. 8316abaa0c9SPierre Ossman */ 832807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 8336abaa0c9SPierre Ossman { 8346abaa0c9SPierre Ossman int err; 835807e8e40SAndy Ross u32 ocr; 8366abaa0c9SPierre Ossman 8376abaa0c9SPierre Ossman BUG_ON(!host); 838d84075c8SPierre Ossman WARN_ON(!host->claimed); 8396abaa0c9SPierre Ossman 840807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 841807e8e40SAndy Ross if (err) 842807e8e40SAndy Ross return err; 843807e8e40SAndy Ross 8449feae246SAdrian Hunter mmc_attach_bus_ops(host); 8458f230f45STakashi Iwai if (host->ocr_avail_mmc) 8468f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 8476abaa0c9SPierre Ossman 8486abaa0c9SPierre Ossman /* 849af517150SDavid Brownell * We need to get OCR a different way for SPI. 850af517150SDavid Brownell */ 851af517150SDavid Brownell if (mmc_host_is_spi(host)) { 852af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 853af517150SDavid Brownell if (err) 854af517150SDavid Brownell goto err; 855af517150SDavid Brownell } 856af517150SDavid Brownell 857af517150SDavid Brownell /* 8586abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 8596abaa0c9SPierre Ossman * support. 8606abaa0c9SPierre Ossman */ 8616abaa0c9SPierre Ossman if (ocr & 0x7F) { 8626abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 8636abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 8646abaa0c9SPierre Ossman mmc_hostname(host)); 8656abaa0c9SPierre Ossman ocr &= ~0x7F; 8666abaa0c9SPierre Ossman } 8676abaa0c9SPierre Ossman 8686abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 8696abaa0c9SPierre Ossman 8706abaa0c9SPierre Ossman /* 8716abaa0c9SPierre Ossman * Can we support the voltage of the card? 8726abaa0c9SPierre Ossman */ 873109b5bedSPierre Ossman if (!host->ocr) { 874109b5bedSPierre Ossman err = -EINVAL; 8756abaa0c9SPierre Ossman goto err; 876109b5bedSPierre Ossman } 8776abaa0c9SPierre Ossman 8786abaa0c9SPierre Ossman /* 8796abaa0c9SPierre Ossman * Detect and init the card. 8806abaa0c9SPierre Ossman */ 8818c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 88217b0429dSPierre Ossman if (err) 8836abaa0c9SPierre Ossman goto err; 8846abaa0c9SPierre Ossman 8856abaa0c9SPierre Ossman mmc_release_host(host); 8864101c16aSPierre Ossman err = mmc_add_card(host->card); 887807e8e40SAndy Ross mmc_claim_host(host); 8887ea239d9SPierre Ossman if (err) 8892986d0bfSPierre Ossman goto remove_card; 8907ea239d9SPierre Ossman 8917ea239d9SPierre Ossman return 0; 8927ea239d9SPierre Ossman 8932986d0bfSPierre Ossman remove_card: 894807e8e40SAndy Ross mmc_release_host(host); 8956abaa0c9SPierre Ossman mmc_remove_card(host->card); 8962986d0bfSPierre Ossman mmc_claim_host(host); 897807e8e40SAndy Ross host->card = NULL; 8987ea239d9SPierre Ossman err: 8997ea239d9SPierre Ossman mmc_detach_bus(host); 9007ea239d9SPierre Ossman 901109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 902109b5bedSPierre Ossman mmc_hostname(host), err); 903109b5bedSPierre Ossman 904adf66a0dSPierre Ossman return err; 9057ea239d9SPierre Ossman } 906