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 /* 17708ee80ccSPhilip Rakity * Read extended CSD. 1787ea239d9SPierre Ossman */ 17908ee80ccSPhilip Rakity static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) 1807ea239d9SPierre Ossman { 1817ea239d9SPierre Ossman int err; 1827ea239d9SPierre Ossman u8 *ext_csd; 1837ea239d9SPierre Ossman 1847ea239d9SPierre Ossman BUG_ON(!card); 18508ee80ccSPhilip Rakity BUG_ON(!new_ext_csd); 18608ee80ccSPhilip Rakity 18708ee80ccSPhilip Rakity *new_ext_csd = NULL; 1887ea239d9SPierre Ossman 1897ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 19017b0429dSPierre Ossman return 0; 1917ea239d9SPierre Ossman 1927ea239d9SPierre Ossman /* 1937ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1947ea239d9SPierre Ossman * raw block in mmc_card. 1957ea239d9SPierre Ossman */ 1967ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1977ea239d9SPierre Ossman if (!ext_csd) { 1987ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 199adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 20017b0429dSPierre Ossman return -ENOMEM; 2017ea239d9SPierre Ossman } 2027ea239d9SPierre Ossman 2037ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 20417b0429dSPierre Ossman if (err) { 20508ee80ccSPhilip Rakity kfree(ext_csd); 20608ee80ccSPhilip Rakity *new_ext_csd = NULL; 20708ee80ccSPhilip Rakity 208d08ebeddSWolfgang Muees /* If the host or the card can't do the switch, 209d08ebeddSWolfgang Muees * fail more gracefully. */ 210d08ebeddSWolfgang Muees if ((err != -EINVAL) 211d08ebeddSWolfgang Muees && (err != -ENOSYS) 212d08ebeddSWolfgang Muees && (err != -EFAULT)) 21308ee80ccSPhilip Rakity return err; 214adf66a0dSPierre Ossman 215adf66a0dSPierre Ossman /* 2167ea239d9SPierre Ossman * High capacity cards should have this "magic" size 2177ea239d9SPierre Ossman * stored in their CSD. 2187ea239d9SPierre Ossman */ 2197ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 2207ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 2217ea239d9SPierre Ossman "on a possible high capacity card. " 2227ea239d9SPierre Ossman "Card will be ignored.\n", 2237ea239d9SPierre Ossman mmc_hostname(card->host)); 2247ea239d9SPierre Ossman } else { 2257ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2267ea239d9SPierre Ossman "EXT_CSD, performance might " 2277ea239d9SPierre Ossman "suffer.\n", 2287ea239d9SPierre Ossman mmc_hostname(card->host)); 22917b0429dSPierre Ossman err = 0; 2307ea239d9SPierre Ossman } 23108ee80ccSPhilip Rakity } else 23208ee80ccSPhilip Rakity *new_ext_csd = ext_csd; 233adf66a0dSPierre Ossman 23408ee80ccSPhilip Rakity return err; 2357ea239d9SPierre Ossman } 2367ea239d9SPierre Ossman 23708ee80ccSPhilip Rakity /* 23808ee80ccSPhilip Rakity * Decode extended CSD. 23908ee80ccSPhilip Rakity */ 24008ee80ccSPhilip Rakity static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) 24108ee80ccSPhilip Rakity { 24208ee80ccSPhilip Rakity int err = 0; 24308ee80ccSPhilip Rakity 24408ee80ccSPhilip Rakity BUG_ON(!card); 24508ee80ccSPhilip Rakity 24608ee80ccSPhilip Rakity if (!ext_csd) 24708ee80ccSPhilip Rakity return 0; 24808ee80ccSPhilip Rakity 2496da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 250f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 2516da24b78SKyungmin Park if (card->csd.structure == 3) { 252f39b2dd9SPhilip Rakity if (card->ext_csd.raw_ext_csd_structure > 2) { 2538fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2548fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 255f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure); 2566da24b78SKyungmin Park err = -EINVAL; 2576da24b78SKyungmin Park goto out; 2586da24b78SKyungmin Park } 2596da24b78SKyungmin Park } 2606da24b78SKyungmin Park 2616da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 26238ca2850SKyungmin Park if (card->ext_csd.rev > 6) { 2636da24b78SKyungmin Park printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n", 2646da24b78SKyungmin Park mmc_hostname(card->host), card->ext_csd.rev); 26500cedfa6SFlorin Malita err = -EINVAL; 26600cedfa6SFlorin Malita goto out; 267d7604d76SPierre Ossman } 268d7604d76SPierre Ossman 269f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 270f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 271f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 272f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 273b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2747ea239d9SPierre Ossman card->ext_csd.sectors = 2757ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2767ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2777ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2787ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 279fc8a0985SHanumath Prasad 280fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 281fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 2827ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 283d7604d76SPierre Ossman } 284f39b2dd9SPhilip Rakity card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 2857198f3c9SAdrian Hunter switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { 286dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | 287dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 288dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 289dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; 290dfc13e84SHanumath Prasad break; 291dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | 292dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 293dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 294dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; 295dfc13e84SHanumath Prasad break; 296dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | 297dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 298dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 299dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; 300dfc13e84SHanumath Prasad break; 3017ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 3027ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 3037ea239d9SPierre Ossman break; 3047ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 3057ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 3067ea239d9SPierre Ossman break; 3077ea239d9SPierre Ossman default: 3087ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 3097ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 3107ea239d9SPierre Ossman "support any high-speed modes.\n", 3117ea239d9SPierre Ossman mmc_hostname(card->host)); 3127ea239d9SPierre Ossman } 3137ea239d9SPierre Ossman 314f39b2dd9SPhilip Rakity card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 315f39b2dd9SPhilip Rakity card->ext_csd.raw_erase_timeout_mult = 316f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 317f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_grp_size = 318f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 319b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 320b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 321371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 322371a689fSAndrei Warkentin 323371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 324371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 325b1ebe384SJarkko Lavinen 326b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 327b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 328b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 329b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 330dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 331dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 332dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 333dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 334dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 335dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 336f4c5522bSAndrei Warkentin 337f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 338371a689fSAndrei Warkentin 339371a689fSAndrei Warkentin /* 340371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 341371a689fSAndrei Warkentin * multiples of 128K. 342371a689fSAndrei Warkentin */ 343371a689fSAndrei Warkentin card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 344b1ebe384SJarkko Lavinen } 345b1ebe384SJarkko Lavinen 346f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_gap_size = 347f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_PARTITION_ATTRIBUTE]; 348f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_trim_mult = 349f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_TRIM_MULT]; 350f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_erase_mult = 351f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_ERASE_MULT]; 352f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_feature_support = 353f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 354f39b2dd9SPhilip Rakity card->ext_csd.raw_trim_mult = 355f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_TRIM_MULT]; 356dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 357709de99dSChuanxiao Dong /* 358709de99dSChuanxiao Dong * Enhanced area feature support -- check whether the eMMC 359709de99dSChuanxiao Dong * card has the Enhanced area enabled. If so, export enhanced 360709de99dSChuanxiao Dong * area offset and size to user by adding sysfs interface. 361709de99dSChuanxiao Dong */ 3625238acbeSAndrei Warkentin card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 363709de99dSChuanxiao Dong if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 364709de99dSChuanxiao Dong (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 365709de99dSChuanxiao Dong u8 hc_erase_grp_sz = 366709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 367709de99dSChuanxiao Dong u8 hc_wp_grp_sz = 368709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 369709de99dSChuanxiao Dong 370709de99dSChuanxiao Dong card->ext_csd.enhanced_area_en = 1; 371709de99dSChuanxiao Dong /* 372709de99dSChuanxiao Dong * calculate the enhanced data area offset, in bytes 373709de99dSChuanxiao Dong */ 374709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = 375709de99dSChuanxiao Dong (ext_csd[139] << 24) + (ext_csd[138] << 16) + 376709de99dSChuanxiao Dong (ext_csd[137] << 8) + ext_csd[136]; 377709de99dSChuanxiao Dong if (mmc_card_blockaddr(card)) 378709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset <<= 9; 379709de99dSChuanxiao Dong /* 380709de99dSChuanxiao Dong * calculate the enhanced data area size, in kilobytes 381709de99dSChuanxiao Dong */ 382709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = 383709de99dSChuanxiao Dong (ext_csd[142] << 16) + (ext_csd[141] << 8) + 384709de99dSChuanxiao Dong ext_csd[140]; 385709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size *= 386709de99dSChuanxiao Dong (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 387709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size <<= 9; 388709de99dSChuanxiao Dong } else { 389709de99dSChuanxiao Dong /* 390709de99dSChuanxiao Dong * If the enhanced area is not enabled, disable these 391709de99dSChuanxiao Dong * device attributes. 392709de99dSChuanxiao Dong */ 393709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 394709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 395709de99dSChuanxiao Dong } 396dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 397dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 398dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 399dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 400dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 401dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 402dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 403dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 404dfe86cbaSAdrian Hunter } 405dfe86cbaSAdrian Hunter 406b2499518SAdrian Hunter if (card->ext_csd.rev >= 5) { 407f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 408b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 409b2499518SAdrian Hunter } 410f4c5522bSAndrei Warkentin 4115238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 412dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 413dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 414dfe86cbaSAdrian Hunter else 415dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 416dfe86cbaSAdrian Hunter 4177ea239d9SPierre Ossman out: 41808ee80ccSPhilip Rakity return err; 41908ee80ccSPhilip Rakity } 4207ea239d9SPierre Ossman 42108ee80ccSPhilip Rakity static inline void mmc_free_ext_csd(u8 *ext_csd) 42208ee80ccSPhilip Rakity { 42308ee80ccSPhilip Rakity kfree(ext_csd); 42408ee80ccSPhilip Rakity } 42508ee80ccSPhilip Rakity 42608ee80ccSPhilip Rakity 427f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 42808ee80ccSPhilip Rakity { 42908ee80ccSPhilip Rakity u8 *bw_ext_csd; 43008ee80ccSPhilip Rakity int err; 43108ee80ccSPhilip Rakity 432f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 433f39b2dd9SPhilip Rakity return 0; 43408ee80ccSPhilip Rakity 435f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 436f39b2dd9SPhilip Rakity 437f39b2dd9SPhilip Rakity if (err || bw_ext_csd == NULL) { 43808ee80ccSPhilip Rakity if (bus_width != MMC_BUS_WIDTH_1) 43908ee80ccSPhilip Rakity err = -EINVAL; 44008ee80ccSPhilip Rakity goto out; 44108ee80ccSPhilip Rakity } 44208ee80ccSPhilip Rakity 44308ee80ccSPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 44408ee80ccSPhilip Rakity goto out; 44508ee80ccSPhilip Rakity 44608ee80ccSPhilip Rakity /* only compare read only fields */ 447f39b2dd9SPhilip Rakity err = (!(card->ext_csd.raw_partition_support == 44808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 449f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 45008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 451f39b2dd9SPhilip Rakity (card->ext_csd.rev == 45208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 453f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 45408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 455f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 45608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 457f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 45808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 459f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 46008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 461f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 46208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 463f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 46408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 465f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 46608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 467f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 46808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 469f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 47008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 471f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 47208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 473f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 474f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 475f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 476f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 477f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 478f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 479f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 480f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 3])); 48108ee80ccSPhilip Rakity if (err) 48208ee80ccSPhilip Rakity err = -EINVAL; 48308ee80ccSPhilip Rakity 48408ee80ccSPhilip Rakity out: 48508ee80ccSPhilip Rakity mmc_free_ext_csd(bw_ext_csd); 4867ea239d9SPierre Ossman return err; 4877ea239d9SPierre Ossman } 4887ea239d9SPierre Ossman 48951ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 49051ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 49151ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 49251ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 49351ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 494dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 495dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 49651ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 49751ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 49851ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 49951ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 50051ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 50151ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 502709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 503709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 504709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 50551ec92e2SPierre Ossman 50651ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 50751ec92e2SPierre Ossman &dev_attr_cid.attr, 50851ec92e2SPierre Ossman &dev_attr_csd.attr, 50951ec92e2SPierre Ossman &dev_attr_date.attr, 510dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 511dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 51251ec92e2SPierre Ossman &dev_attr_fwrev.attr, 51351ec92e2SPierre Ossman &dev_attr_hwrev.attr, 51451ec92e2SPierre Ossman &dev_attr_manfid.attr, 51551ec92e2SPierre Ossman &dev_attr_name.attr, 51651ec92e2SPierre Ossman &dev_attr_oemid.attr, 51751ec92e2SPierre Ossman &dev_attr_serial.attr, 518709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 519709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 52051ec92e2SPierre Ossman NULL, 52151ec92e2SPierre Ossman }; 52251ec92e2SPierre Ossman 52351ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 52451ec92e2SPierre Ossman .attrs = mmc_std_attrs, 52551ec92e2SPierre Ossman }; 52651ec92e2SPierre Ossman 527a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 52851ec92e2SPierre Ossman &mmc_std_attr_group, 52951ec92e2SPierre Ossman NULL, 53051ec92e2SPierre Ossman }; 53151ec92e2SPierre Ossman 53251ec92e2SPierre Ossman static struct device_type mmc_type = { 53351ec92e2SPierre Ossman .groups = mmc_attr_groups, 53451ec92e2SPierre Ossman }; 53551ec92e2SPierre Ossman 5367ea239d9SPierre Ossman /* 537b87d8dbfSGirish K S * Select the PowerClass for the current bus width 538b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 539b87d8dbfSGirish K S * extended CSD register, select it by executing the 540b87d8dbfSGirish K S * mmc_switch command. 541b87d8dbfSGirish K S */ 542b87d8dbfSGirish K S static int mmc_select_powerclass(struct mmc_card *card, 543b87d8dbfSGirish K S unsigned int bus_width, u8 *ext_csd) 544b87d8dbfSGirish K S { 545b87d8dbfSGirish K S int err = 0; 546b87d8dbfSGirish K S unsigned int pwrclass_val; 547b87d8dbfSGirish K S unsigned int index = 0; 548b87d8dbfSGirish K S struct mmc_host *host; 549b87d8dbfSGirish K S 550b87d8dbfSGirish K S BUG_ON(!card); 551b87d8dbfSGirish K S 552b87d8dbfSGirish K S host = card->host; 553b87d8dbfSGirish K S BUG_ON(!host); 554b87d8dbfSGirish K S 555b87d8dbfSGirish K S if (ext_csd == NULL) 556b87d8dbfSGirish K S return 0; 557b87d8dbfSGirish K S 558b87d8dbfSGirish K S /* Power class selection is supported for versions >= 4.0 */ 559b87d8dbfSGirish K S if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 560b87d8dbfSGirish K S return 0; 561b87d8dbfSGirish K S 562b87d8dbfSGirish K S /* Power class values are defined only for 4/8 bit bus */ 563b87d8dbfSGirish K S if (bus_width == EXT_CSD_BUS_WIDTH_1) 564b87d8dbfSGirish K S return 0; 565b87d8dbfSGirish K S 566b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 567b87d8dbfSGirish K S case MMC_VDD_165_195: 568b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 569b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_195; 570b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 571b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 572b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_195 : 573b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_195; 574b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 575b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_195; 576b87d8dbfSGirish K S break; 577b87d8dbfSGirish K S case MMC_VDD_32_33: 578b87d8dbfSGirish K S case MMC_VDD_33_34: 579b87d8dbfSGirish K S case MMC_VDD_34_35: 580b87d8dbfSGirish K S case MMC_VDD_35_36: 581b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 582b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_360; 583b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 584b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 585b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_360 : 586b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_360; 587b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 588b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_360; 589b87d8dbfSGirish K S break; 590b87d8dbfSGirish K S default: 591b87d8dbfSGirish K S pr_warning("%s: Voltage range not supported " 592b87d8dbfSGirish K S "for power class.\n", mmc_hostname(host)); 593b87d8dbfSGirish K S return -EINVAL; 594b87d8dbfSGirish K S } 595b87d8dbfSGirish K S 596b87d8dbfSGirish K S pwrclass_val = ext_csd[index]; 597b87d8dbfSGirish K S 598b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 599b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 600b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 601b87d8dbfSGirish K S else 602b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 603b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 604b87d8dbfSGirish K S 605b87d8dbfSGirish K S /* If the power class is different from the default value */ 606b87d8dbfSGirish K S if (pwrclass_val > 0) { 607b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 608b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 609b87d8dbfSGirish K S pwrclass_val, 610b87d8dbfSGirish K S 0); 611b87d8dbfSGirish K S } 612b87d8dbfSGirish K S 613b87d8dbfSGirish K S return err; 614b87d8dbfSGirish K S } 615b87d8dbfSGirish K S 616b87d8dbfSGirish K S /* 6176abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 6186abaa0c9SPierre Ossman * 6198769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 6206abaa0c9SPierre Ossman * we're trying to reinitialise. 6217ea239d9SPierre Ossman */ 6228c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 6236abaa0c9SPierre Ossman struct mmc_card *oldcard) 6247ea239d9SPierre Ossman { 6257ea239d9SPierre Ossman struct mmc_card *card; 62625d5c699SPhilip Rakity int err, ddr = 0; 6277ea239d9SPierre Ossman u32 cid[4]; 6287ea239d9SPierre Ossman unsigned int max_dtr; 629b676f039SPhilip Rakity u32 rocr; 63008ee80ccSPhilip Rakity u8 *ext_csd = NULL; 6317ea239d9SPierre Ossman 6327ea239d9SPierre Ossman BUG_ON(!host); 633d84075c8SPierre Ossman WARN_ON(!host->claimed); 6347ea239d9SPierre Ossman 63544669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 63644669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 63744669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 63844669034SStefan Nilsson XK 6397ea239d9SPierre Ossman /* 6407ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 6417ea239d9SPierre Ossman * need to tell some cards to go back to the idle 6427ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 6437ea239d9SPierre Ossman * respond. 644c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 6457ea239d9SPierre Ossman */ 6467ea239d9SPierre Ossman mmc_go_idle(host); 6477ea239d9SPierre Ossman 6487ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 649b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 65017b0429dSPierre Ossman if (err) 6516abaa0c9SPierre Ossman goto err; 6527ea239d9SPierre Ossman 6537ea239d9SPierre Ossman /* 654af517150SDavid Brownell * For SPI, enable CRC as appropriate. 655af517150SDavid Brownell */ 656af517150SDavid Brownell if (mmc_host_is_spi(host)) { 657af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 658af517150SDavid Brownell if (err) 659af517150SDavid Brownell goto err; 660af517150SDavid Brownell } 661af517150SDavid Brownell 662af517150SDavid Brownell /* 6637ea239d9SPierre Ossman * Fetch CID from card. 6647ea239d9SPierre Ossman */ 665af517150SDavid Brownell if (mmc_host_is_spi(host)) 666af517150SDavid Brownell err = mmc_send_cid(host, cid); 667af517150SDavid Brownell else 6687ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 66917b0429dSPierre Ossman if (err) 6707ea239d9SPierre Ossman goto err; 6717ea239d9SPierre Ossman 6726abaa0c9SPierre Ossman if (oldcard) { 673adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 674adf66a0dSPierre Ossman err = -ENOENT; 6756abaa0c9SPierre Ossman goto err; 676adf66a0dSPierre Ossman } 6776abaa0c9SPierre Ossman 6786abaa0c9SPierre Ossman card = oldcard; 6796abaa0c9SPierre Ossman } else { 6807ea239d9SPierre Ossman /* 6817ea239d9SPierre Ossman * Allocate card structure. 6827ea239d9SPierre Ossman */ 68351ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 684adf66a0dSPierre Ossman if (IS_ERR(card)) { 685adf66a0dSPierre Ossman err = PTR_ERR(card); 6867ea239d9SPierre Ossman goto err; 687adf66a0dSPierre Ossman } 6887ea239d9SPierre Ossman 6897ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 6907ea239d9SPierre Ossman card->rca = 1; 6917ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 6926abaa0c9SPierre Ossman } 6937ea239d9SPierre Ossman 6947ea239d9SPierre Ossman /* 695af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 6967ea239d9SPierre Ossman */ 697af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 6987ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 69917b0429dSPierre Ossman if (err) 7007ea239d9SPierre Ossman goto free_card; 7017ea239d9SPierre Ossman 7027ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 703af517150SDavid Brownell } 7047ea239d9SPierre Ossman 7056abaa0c9SPierre Ossman if (!oldcard) { 7067ea239d9SPierre Ossman /* 7077ea239d9SPierre Ossman * Fetch CSD from card. 7087ea239d9SPierre Ossman */ 7097ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 71017b0429dSPierre Ossman if (err) 7117ea239d9SPierre Ossman goto free_card; 7127ea239d9SPierre Ossman 713bd766312SPierre Ossman err = mmc_decode_csd(card); 714adf66a0dSPierre Ossman if (err) 715bd766312SPierre Ossman goto free_card; 716bd766312SPierre Ossman err = mmc_decode_cid(card); 717adf66a0dSPierre Ossman if (err) 718bd766312SPierre Ossman goto free_card; 7196abaa0c9SPierre Ossman } 7207ea239d9SPierre Ossman 7217ea239d9SPierre Ossman /* 72289a73cf5SPierre Ossman * Select card, as all following commands rely on that. 7237ea239d9SPierre Ossman */ 724af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 7257ea239d9SPierre Ossman err = mmc_select_card(card); 72617b0429dSPierre Ossman if (err) 7277ea239d9SPierre Ossman goto free_card; 728af517150SDavid Brownell } 7297ea239d9SPierre Ossman 7306abaa0c9SPierre Ossman if (!oldcard) { 73189a73cf5SPierre Ossman /* 732af517150SDavid Brownell * Fetch and process extended CSD. 73389a73cf5SPierre Ossman */ 73408ee80ccSPhilip Rakity 73508ee80ccSPhilip Rakity err = mmc_get_ext_csd(card, &ext_csd); 73608ee80ccSPhilip Rakity if (err) 73708ee80ccSPhilip Rakity goto free_card; 73808ee80ccSPhilip Rakity err = mmc_read_ext_csd(card, ext_csd); 73917b0429dSPierre Ossman if (err) 7407ea239d9SPierre Ossman goto free_card; 741b676f039SPhilip Rakity 742b676f039SPhilip Rakity /* If doing byte addressing, check if required to do sector 743b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 744b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 745b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 746b676f039SPhilip Rakity */ 747b676f039SPhilip Rakity if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) 748b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 749b676f039SPhilip Rakity 750dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 751dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 7526abaa0c9SPierre Ossman } 7537ea239d9SPierre Ossman 7547ea239d9SPierre Ossman /* 755709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 756709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 757709de99dSChuanxiao Dong */ 758709de99dSChuanxiao Dong if (card->ext_csd.enhanced_area_en) { 759709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 760d3a8d95dSAndrei Warkentin EXT_CSD_ERASE_GROUP_DEF, 1, 0); 761709de99dSChuanxiao Dong 762709de99dSChuanxiao Dong if (err && err != -EBADMSG) 763709de99dSChuanxiao Dong goto free_card; 764709de99dSChuanxiao Dong 765709de99dSChuanxiao Dong if (err) { 766709de99dSChuanxiao Dong err = 0; 767709de99dSChuanxiao Dong /* 768709de99dSChuanxiao Dong * Just disable enhanced area off & sz 769709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 770709de99dSChuanxiao Dong * during next time reinit 771709de99dSChuanxiao Dong */ 772709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 773709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 774709de99dSChuanxiao Dong } else { 775709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 776709de99dSChuanxiao Dong /* 777709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 778709de99dSChuanxiao Dong * This will affect the erase size, so 779709de99dSChuanxiao Dong * here need to reset erase size 780709de99dSChuanxiao Dong */ 781709de99dSChuanxiao Dong mmc_set_erase_size(card); 782709de99dSChuanxiao Dong } 783709de99dSChuanxiao Dong } 784709de99dSChuanxiao Dong 785709de99dSChuanxiao Dong /* 78641e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 78741e2a489SPhilip Rakity */ 788371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 789371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 790371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 791371a689fSAndrei Warkentin card->ext_csd.part_config, 792371a689fSAndrei Warkentin card->ext_csd.part_time); 793371a689fSAndrei Warkentin if (err && err != -EBADMSG) 794371a689fSAndrei Warkentin goto free_card; 79541e2a489SPhilip Rakity } 79641e2a489SPhilip Rakity 79741e2a489SPhilip Rakity /* 79889a73cf5SPierre Ossman * Activate high speed (if supported) 79989a73cf5SPierre Ossman */ 80089a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 80189a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 80289a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 803d3a8d95dSAndrei Warkentin EXT_CSD_HS_TIMING, 1, 0); 804ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 80589a73cf5SPierre Ossman goto free_card; 80689a73cf5SPierre Ossman 807ef0b27d4SAdrian Hunter if (err) { 808ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to highspeed failed\n", 809ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 810ef0b27d4SAdrian Hunter err = 0; 811ef0b27d4SAdrian Hunter } else { 81289a73cf5SPierre Ossman mmc_card_set_highspeed(card); 81389a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 81489a73cf5SPierre Ossman } 815ef0b27d4SAdrian Hunter } 81689a73cf5SPierre Ossman 81789a73cf5SPierre Ossman /* 8187ea239d9SPierre Ossman * Compute bus speed. 8197ea239d9SPierre Ossman */ 8207ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 8217ea239d9SPierre Ossman 8227ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 8237ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 8247ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 8257ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8267ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 8277ea239d9SPierre Ossman } 8287ea239d9SPierre Ossman 8297ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 8307ea239d9SPierre Ossman 83189a73cf5SPierre Ossman /* 8320f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 833dfc13e84SHanumath Prasad */ 834dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 835dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 8364c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_8V_DDR | 8374c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 8384c4cb171SPhilip Rakity == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50))) 83949e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 840dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 8414c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_2V_DDR | 8424c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 8434c4cb171SPhilip Rakity == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50))) 84449e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 845dfc13e84SHanumath Prasad } 846dfc13e84SHanumath Prasad 847dfc13e84SHanumath Prasad /* 8480f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 84989a73cf5SPierre Ossman */ 85089a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 851b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 85222113efdSAries Lee static unsigned ext_csd_bits[][2] = { 85322113efdSAries Lee { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, 85422113efdSAries Lee { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, 85522113efdSAries Lee { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, 85622113efdSAries Lee }; 85722113efdSAries Lee static unsigned bus_widths[] = { 85822113efdSAries Lee MMC_BUS_WIDTH_8, 85922113efdSAries Lee MMC_BUS_WIDTH_4, 86022113efdSAries Lee MMC_BUS_WIDTH_1 86122113efdSAries Lee }; 86222113efdSAries Lee unsigned idx, bus_width = 0; 863b30f8af3SJarkko Lavinen 86422113efdSAries Lee if (host->caps & MMC_CAP_8_BIT_DATA) 86522113efdSAries Lee idx = 0; 866dfc13e84SHanumath Prasad else 86722113efdSAries Lee idx = 1; 86822113efdSAries Lee for (; idx < ARRAY_SIZE(bus_widths); idx++) { 86922113efdSAries Lee bus_width = bus_widths[idx]; 87022113efdSAries Lee if (bus_width == MMC_BUS_WIDTH_1) 87122113efdSAries Lee ddr = 0; /* no DDR for 1-bit width */ 872b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][0], 873b87d8dbfSGirish K S ext_csd); 874b87d8dbfSGirish K S if (err) 875b87d8dbfSGirish K S pr_err("%s: power class selection to " 876b87d8dbfSGirish K S "bus width %d failed\n", 877b87d8dbfSGirish K S mmc_hostname(card->host), 878b87d8dbfSGirish K S 1 << bus_width); 879b87d8dbfSGirish K S 88022113efdSAries Lee err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 88122113efdSAries Lee EXT_CSD_BUS_WIDTH, 882d3a8d95dSAndrei Warkentin ext_csd_bits[idx][0], 883d3a8d95dSAndrei Warkentin 0); 88422113efdSAries Lee if (!err) { 8854c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 88608ee80ccSPhilip Rakity 88722113efdSAries Lee /* 88822113efdSAries Lee * If controller can't handle bus width test, 88908ee80ccSPhilip Rakity * compare ext_csd previously read in 1 bit mode 89008ee80ccSPhilip Rakity * against ext_csd at new bus width 89122113efdSAries Lee */ 89222113efdSAries Lee if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 89308ee80ccSPhilip Rakity err = mmc_compare_ext_csds(card, 89408ee80ccSPhilip Rakity bus_width); 89508ee80ccSPhilip Rakity else 89622113efdSAries Lee err = mmc_bus_test(card, bus_width); 89722113efdSAries Lee if (!err) 89822113efdSAries Lee break; 89922113efdSAries Lee } 900b30f8af3SJarkko Lavinen } 901b30f8af3SJarkko Lavinen 90222113efdSAries Lee if (!err && ddr) { 903b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][1], 904b87d8dbfSGirish K S ext_csd); 905b87d8dbfSGirish K S if (err) 906b87d8dbfSGirish K S pr_err("%s: power class selection to " 907b87d8dbfSGirish K S "bus width %d ddr %d failed\n", 908b87d8dbfSGirish K S mmc_hostname(card->host), 909b87d8dbfSGirish K S 1 << bus_width, ddr); 910b87d8dbfSGirish K S 91189a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 91222113efdSAries Lee EXT_CSD_BUS_WIDTH, 913d3a8d95dSAndrei Warkentin ext_csd_bits[idx][1], 914d3a8d95dSAndrei Warkentin 0); 91522113efdSAries Lee } 916ef0b27d4SAdrian Hunter if (err) { 9170f8d8ea6SAdrian Hunter printk(KERN_WARNING "%s: switch to bus width %d ddr %d " 918ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 9190f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 92022113efdSAries Lee goto free_card; 92122113efdSAries Lee } else if (ddr) { 9224c4cb171SPhilip Rakity /* 9234c4cb171SPhilip Rakity * eMMC cards can support 3.3V to 1.2V i/o (vccq) 9244c4cb171SPhilip Rakity * signaling. 9254c4cb171SPhilip Rakity * 9264c4cb171SPhilip Rakity * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 9274c4cb171SPhilip Rakity * 9284c4cb171SPhilip Rakity * 1.8V vccq at 3.3V core voltage (vcc) is not required 9294c4cb171SPhilip Rakity * in the JEDEC spec for DDR. 9304c4cb171SPhilip Rakity * 9314c4cb171SPhilip Rakity * Do not force change in vccq since we are obviously 9324c4cb171SPhilip Rakity * working and no change to vccq is needed. 9334c4cb171SPhilip Rakity * 9344c4cb171SPhilip Rakity * WARNING: eMMC rules are NOT the same as SD DDR 9354c4cb171SPhilip Rakity */ 9364c4cb171SPhilip Rakity if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) { 9374c4cb171SPhilip Rakity err = mmc_set_signal_voltage(host, 9384c4cb171SPhilip Rakity MMC_SIGNAL_VOLTAGE_120, 0); 9394c4cb171SPhilip Rakity if (err) 9404c4cb171SPhilip Rakity goto err; 9414c4cb171SPhilip Rakity } 9420f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 9434c4cb171SPhilip Rakity mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50); 9444c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 94589a73cf5SPierre Ossman } 946ef0b27d4SAdrian Hunter } 94789a73cf5SPierre Ossman 9486abaa0c9SPierre Ossman if (!oldcard) 9497ea239d9SPierre Ossman host->card = card; 9507ea239d9SPierre Ossman 95108ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 95217b0429dSPierre Ossman return 0; 9536abaa0c9SPierre Ossman 9546abaa0c9SPierre Ossman free_card: 9556abaa0c9SPierre Ossman if (!oldcard) 9566abaa0c9SPierre Ossman mmc_remove_card(card); 9576abaa0c9SPierre Ossman err: 95808ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 9596abaa0c9SPierre Ossman 960adf66a0dSPierre Ossman return err; 9616abaa0c9SPierre Ossman } 9626abaa0c9SPierre Ossman 9636abaa0c9SPierre Ossman /* 9646abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 9656abaa0c9SPierre Ossman */ 9666abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 9676abaa0c9SPierre Ossman { 9686abaa0c9SPierre Ossman BUG_ON(!host); 9696abaa0c9SPierre Ossman BUG_ON(!host->card); 9706abaa0c9SPierre Ossman 9716abaa0c9SPierre Ossman mmc_remove_card(host->card); 9726abaa0c9SPierre Ossman host->card = NULL; 9736abaa0c9SPierre Ossman } 9746abaa0c9SPierre Ossman 9756abaa0c9SPierre Ossman /* 9766abaa0c9SPierre Ossman * Card detection callback from host. 9776abaa0c9SPierre Ossman */ 9786abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 9796abaa0c9SPierre Ossman { 9806abaa0c9SPierre Ossman int err; 9816abaa0c9SPierre Ossman 9826abaa0c9SPierre Ossman BUG_ON(!host); 9836abaa0c9SPierre Ossman BUG_ON(!host->card); 9846abaa0c9SPierre Ossman 9856abaa0c9SPierre Ossman mmc_claim_host(host); 9866abaa0c9SPierre Ossman 9876abaa0c9SPierre Ossman /* 9886abaa0c9SPierre Ossman * Just check if our card has been removed. 9896abaa0c9SPierre Ossman */ 9906abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 9916abaa0c9SPierre Ossman 9927ea239d9SPierre Ossman mmc_release_host(host); 9937ea239d9SPierre Ossman 99417b0429dSPierre Ossman if (err) { 9954101c16aSPierre Ossman mmc_remove(host); 9966abaa0c9SPierre Ossman 9976abaa0c9SPierre Ossman mmc_claim_host(host); 9986abaa0c9SPierre Ossman mmc_detach_bus(host); 9997f7e4129SUlf Hansson mmc_power_off(host); 10006abaa0c9SPierre Ossman mmc_release_host(host); 10016abaa0c9SPierre Ossman } 10026abaa0c9SPierre Ossman } 10036abaa0c9SPierre Ossman 10046abaa0c9SPierre Ossman /* 10056abaa0c9SPierre Ossman * Suspend callback from host. 10066abaa0c9SPierre Ossman */ 100795cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 10086abaa0c9SPierre Ossman { 1009c3805467SBalaji T K int err = 0; 1010c3805467SBalaji T K 10116abaa0c9SPierre Ossman BUG_ON(!host); 10126abaa0c9SPierre Ossman BUG_ON(!host->card); 10136abaa0c9SPierre Ossman 10146abaa0c9SPierre Ossman mmc_claim_host(host); 1015c3805467SBalaji T K if (mmc_card_can_sleep(host)) 1016c3805467SBalaji T K err = mmc_card_sleep(host); 1017c3805467SBalaji T K else if (!mmc_host_is_spi(host)) 10186abaa0c9SPierre Ossman mmc_deselect_cards(host); 10196abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 10206abaa0c9SPierre Ossman mmc_release_host(host); 102195cdfb72SNicolas Pitre 1022c3805467SBalaji T K return err; 10236abaa0c9SPierre Ossman } 10246abaa0c9SPierre Ossman 10256abaa0c9SPierre Ossman /* 10266abaa0c9SPierre Ossman * Resume callback from host. 10276abaa0c9SPierre Ossman * 10286abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 10296abaa0c9SPierre Ossman * and, if so, restore all state to it. 10306abaa0c9SPierre Ossman */ 103195cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 10326abaa0c9SPierre Ossman { 10336abaa0c9SPierre Ossman int err; 10346abaa0c9SPierre Ossman 10356abaa0c9SPierre Ossman BUG_ON(!host); 10366abaa0c9SPierre Ossman BUG_ON(!host->card); 10376abaa0c9SPierre Ossman 10386abaa0c9SPierre Ossman mmc_claim_host(host); 10398c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 10402986d0bfSPierre Ossman mmc_release_host(host); 10412986d0bfSPierre Ossman 104295cdfb72SNicolas Pitre return err; 10436abaa0c9SPierre Ossman } 10446abaa0c9SPierre Ossman 104512ae637fSOhad Ben-Cohen static int mmc_power_restore(struct mmc_host *host) 1046eae1aeeeSAdrian Hunter { 104712ae637fSOhad Ben-Cohen int ret; 104812ae637fSOhad Ben-Cohen 1049eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 1050eae1aeeeSAdrian Hunter mmc_claim_host(host); 105112ae637fSOhad Ben-Cohen ret = mmc_init_card(host, host->ocr, host->card); 1052eae1aeeeSAdrian Hunter mmc_release_host(host); 105312ae637fSOhad Ben-Cohen 105412ae637fSOhad Ben-Cohen return ret; 1055eae1aeeeSAdrian Hunter } 1056eae1aeeeSAdrian Hunter 1057b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 1058b1ebe384SJarkko Lavinen { 1059b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1060b1ebe384SJarkko Lavinen int err = -ENOSYS; 1061b1ebe384SJarkko Lavinen 1062b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1063b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 1064b1ebe384SJarkko Lavinen if (err < 0) 1065b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 1066b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1067b1ebe384SJarkko Lavinen } 1068b1ebe384SJarkko Lavinen 1069b1ebe384SJarkko Lavinen return err; 1070b1ebe384SJarkko Lavinen } 1071b1ebe384SJarkko Lavinen 1072b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 1073b1ebe384SJarkko Lavinen { 1074b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1075b1ebe384SJarkko Lavinen int err = -ENOSYS; 1076b1ebe384SJarkko Lavinen 1077b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1078b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 1079b1ebe384SJarkko Lavinen if (err < 0) 1080b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 1081b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1082b1ebe384SJarkko Lavinen } 1083b1ebe384SJarkko Lavinen 1084b1ebe384SJarkko Lavinen return err; 1085b1ebe384SJarkko Lavinen } 1086b1ebe384SJarkko Lavinen 10879feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 1088b1ebe384SJarkko Lavinen .awake = mmc_awake, 1089b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 10909feae246SAdrian Hunter .remove = mmc_remove, 10919feae246SAdrian Hunter .detect = mmc_detect, 10929feae246SAdrian Hunter .suspend = NULL, 10939feae246SAdrian Hunter .resume = NULL, 1094eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 10959feae246SAdrian Hunter }; 10969feae246SAdrian Hunter 10979feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 1098b1ebe384SJarkko Lavinen .awake = mmc_awake, 1099b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 11009feae246SAdrian Hunter .remove = mmc_remove, 11019feae246SAdrian Hunter .detect = mmc_detect, 11029feae246SAdrian Hunter .suspend = mmc_suspend, 11039feae246SAdrian Hunter .resume = mmc_resume, 1104eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 11059feae246SAdrian Hunter }; 11069feae246SAdrian Hunter 11079feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 11089feae246SAdrian Hunter { 11099feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 11109feae246SAdrian Hunter 111171d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 11129feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 11139feae246SAdrian Hunter else 11149feae246SAdrian Hunter bus_ops = &mmc_ops; 11159feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 11169feae246SAdrian Hunter } 11179feae246SAdrian Hunter 11186abaa0c9SPierre Ossman /* 11196abaa0c9SPierre Ossman * Starting point for MMC card init. 11206abaa0c9SPierre Ossman */ 1121807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 11226abaa0c9SPierre Ossman { 11236abaa0c9SPierre Ossman int err; 1124807e8e40SAndy Ross u32 ocr; 11256abaa0c9SPierre Ossman 11266abaa0c9SPierre Ossman BUG_ON(!host); 1127d84075c8SPierre Ossman WARN_ON(!host->claimed); 11286abaa0c9SPierre Ossman 112944669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 113044669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 113144669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 113244669034SStefan Nilsson XK 1133807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 1134807e8e40SAndy Ross if (err) 1135807e8e40SAndy Ross return err; 1136807e8e40SAndy Ross 11379feae246SAdrian Hunter mmc_attach_bus_ops(host); 11388f230f45STakashi Iwai if (host->ocr_avail_mmc) 11398f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 11406abaa0c9SPierre Ossman 11416abaa0c9SPierre Ossman /* 1142af517150SDavid Brownell * We need to get OCR a different way for SPI. 1143af517150SDavid Brownell */ 1144af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1145af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 1146af517150SDavid Brownell if (err) 1147af517150SDavid Brownell goto err; 1148af517150SDavid Brownell } 1149af517150SDavid Brownell 1150af517150SDavid Brownell /* 11516abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 11526abaa0c9SPierre Ossman * support. 11536abaa0c9SPierre Ossman */ 11546abaa0c9SPierre Ossman if (ocr & 0x7F) { 11556abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 11566abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 11576abaa0c9SPierre Ossman mmc_hostname(host)); 11586abaa0c9SPierre Ossman ocr &= ~0x7F; 11596abaa0c9SPierre Ossman } 11606abaa0c9SPierre Ossman 11616abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 11626abaa0c9SPierre Ossman 11636abaa0c9SPierre Ossman /* 11646abaa0c9SPierre Ossman * Can we support the voltage of the card? 11656abaa0c9SPierre Ossman */ 1166109b5bedSPierre Ossman if (!host->ocr) { 1167109b5bedSPierre Ossman err = -EINVAL; 11686abaa0c9SPierre Ossman goto err; 1169109b5bedSPierre Ossman } 11706abaa0c9SPierre Ossman 11716abaa0c9SPierre Ossman /* 11726abaa0c9SPierre Ossman * Detect and init the card. 11736abaa0c9SPierre Ossman */ 11748c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 117517b0429dSPierre Ossman if (err) 11766abaa0c9SPierre Ossman goto err; 11776abaa0c9SPierre Ossman 11786abaa0c9SPierre Ossman mmc_release_host(host); 11794101c16aSPierre Ossman err = mmc_add_card(host->card); 1180807e8e40SAndy Ross mmc_claim_host(host); 11817ea239d9SPierre Ossman if (err) 11822986d0bfSPierre Ossman goto remove_card; 11837ea239d9SPierre Ossman 11847ea239d9SPierre Ossman return 0; 11857ea239d9SPierre Ossman 11862986d0bfSPierre Ossman remove_card: 1187807e8e40SAndy Ross mmc_release_host(host); 11886abaa0c9SPierre Ossman mmc_remove_card(host->card); 11892986d0bfSPierre Ossman mmc_claim_host(host); 1190807e8e40SAndy Ross host->card = NULL; 11917ea239d9SPierre Ossman err: 11927ea239d9SPierre Ossman mmc_detach_bus(host); 11937ea239d9SPierre Ossman 1194109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 1195109b5bedSPierre Ossman mmc_hostname(host), err); 1196109b5bedSPierre Ossman 1197adf66a0dSPierre Ossman return err; 11987ea239d9SPierre Ossman } 1199