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: 104a3c76eb9SGirish K S pr_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) { 138a3c76eb9SGirish K S pr_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) { 198a3c76eb9SGirish K S pr_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)) { 220a3c76eb9SGirish K S pr_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 { 225a3c76eb9SGirish K S pr_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 { 242e0c368d5SNamjae Jeon int err = 0, idx; 243e0c368d5SNamjae Jeon unsigned int part_size; 244e0c368d5SNamjae Jeon u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; 24508ee80ccSPhilip Rakity 24608ee80ccSPhilip Rakity BUG_ON(!card); 24708ee80ccSPhilip Rakity 24808ee80ccSPhilip Rakity if (!ext_csd) 24908ee80ccSPhilip Rakity return 0; 25008ee80ccSPhilip Rakity 2516da24b78SKyungmin Park /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ 252f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; 2536da24b78SKyungmin Park if (card->csd.structure == 3) { 254f39b2dd9SPhilip Rakity if (card->ext_csd.raw_ext_csd_structure > 2) { 255a3c76eb9SGirish K S pr_err("%s: unrecognised EXT_CSD structure " 2568fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 257f39b2dd9SPhilip Rakity card->ext_csd.raw_ext_csd_structure); 2586da24b78SKyungmin Park err = -EINVAL; 2596da24b78SKyungmin Park goto out; 2606da24b78SKyungmin Park } 2616da24b78SKyungmin Park } 2626da24b78SKyungmin Park 2636da24b78SKyungmin Park card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 26438ca2850SKyungmin Park if (card->ext_csd.rev > 6) { 265a3c76eb9SGirish K S pr_err("%s: unrecognised EXT_CSD revision %d\n", 2666da24b78SKyungmin Park mmc_hostname(card->host), card->ext_csd.rev); 26700cedfa6SFlorin Malita err = -EINVAL; 26800cedfa6SFlorin Malita goto out; 269d7604d76SPierre Ossman } 270d7604d76SPierre Ossman 271f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; 272f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; 273f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; 274f39b2dd9SPhilip Rakity card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; 275b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2767ea239d9SPierre Ossman card->ext_csd.sectors = 2777ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2787ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2797ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2807ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 281fc8a0985SHanumath Prasad 282fc8a0985SHanumath Prasad /* Cards with density > 2GiB are sector addressed */ 283fc8a0985SHanumath Prasad if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) 2847ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 285d7604d76SPierre Ossman } 286f39b2dd9SPhilip Rakity card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; 2877198f3c9SAdrian Hunter switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { 288dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | 289dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 290dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 291dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; 292dfc13e84SHanumath Prasad break; 293dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | 294dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 295dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 296dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; 297dfc13e84SHanumath Prasad break; 298dfc13e84SHanumath Prasad case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | 299dfc13e84SHanumath Prasad EXT_CSD_CARD_TYPE_26: 300dfc13e84SHanumath Prasad card->ext_csd.hs_max_dtr = 52000000; 301dfc13e84SHanumath Prasad card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; 302dfc13e84SHanumath Prasad break; 3037ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 3047ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 3057ea239d9SPierre Ossman break; 3067ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 3077ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 3087ea239d9SPierre Ossman break; 3097ea239d9SPierre Ossman default: 3107ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 311a3c76eb9SGirish K S pr_warning("%s: card is mmc v4 but doesn't " 3127ea239d9SPierre Ossman "support any high-speed modes.\n", 3137ea239d9SPierre Ossman mmc_hostname(card->host)); 3147ea239d9SPierre Ossman } 3157ea239d9SPierre Ossman 316f39b2dd9SPhilip Rakity card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; 317f39b2dd9SPhilip Rakity card->ext_csd.raw_erase_timeout_mult = 318f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 319f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_grp_size = 320f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 321b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 322b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 323371a689fSAndrei Warkentin card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; 324371a689fSAndrei Warkentin 325371a689fSAndrei Warkentin /* EXT_CSD value is in units of 10ms, but we store in ms */ 326371a689fSAndrei Warkentin card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; 327b1ebe384SJarkko Lavinen 328b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 329b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 330b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 331b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 332dfe86cbaSAdrian Hunter card->ext_csd.erase_group_def = 333dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_GROUP_DEF]; 334dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_timeout = 300 * 335dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; 336dfe86cbaSAdrian Hunter card->ext_csd.hc_erase_size = 337dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; 338f4c5522bSAndrei Warkentin 339f4c5522bSAndrei Warkentin card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; 340371a689fSAndrei Warkentin 341371a689fSAndrei Warkentin /* 342371a689fSAndrei Warkentin * There are two boot regions of equal size, defined in 343371a689fSAndrei Warkentin * multiples of 128K. 344371a689fSAndrei Warkentin */ 345e0c368d5SNamjae Jeon if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { 346e0c368d5SNamjae Jeon for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { 347e0c368d5SNamjae Jeon part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; 348e0c368d5SNamjae Jeon mmc_part_add(card, part_size, 349e0c368d5SNamjae Jeon EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, 350e0c368d5SNamjae Jeon "boot%d", idx, true); 351e0c368d5SNamjae Jeon } 352e0c368d5SNamjae Jeon } 353b1ebe384SJarkko Lavinen } 354b1ebe384SJarkko Lavinen 355f39b2dd9SPhilip Rakity card->ext_csd.raw_hc_erase_gap_size = 356f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_PARTITION_ATTRIBUTE]; 357f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_trim_mult = 358f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_TRIM_MULT]; 359f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_erase_mult = 360f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_ERASE_MULT]; 361f39b2dd9SPhilip Rakity card->ext_csd.raw_sec_feature_support = 362f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 363f39b2dd9SPhilip Rakity card->ext_csd.raw_trim_mult = 364f39b2dd9SPhilip Rakity ext_csd[EXT_CSD_TRIM_MULT]; 365dfe86cbaSAdrian Hunter if (card->ext_csd.rev >= 4) { 366709de99dSChuanxiao Dong /* 367709de99dSChuanxiao Dong * Enhanced area feature support -- check whether the eMMC 368709de99dSChuanxiao Dong * card has the Enhanced area enabled. If so, export enhanced 369709de99dSChuanxiao Dong * area offset and size to user by adding sysfs interface. 370709de99dSChuanxiao Dong */ 3715238acbeSAndrei Warkentin card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; 372709de99dSChuanxiao Dong if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && 373709de99dSChuanxiao Dong (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { 374e0c368d5SNamjae Jeon hc_erase_grp_sz = 375709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 376e0c368d5SNamjae Jeon hc_wp_grp_sz = 377709de99dSChuanxiao Dong ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 378709de99dSChuanxiao Dong 379709de99dSChuanxiao Dong card->ext_csd.enhanced_area_en = 1; 380709de99dSChuanxiao Dong /* 381709de99dSChuanxiao Dong * calculate the enhanced data area offset, in bytes 382709de99dSChuanxiao Dong */ 383709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = 384709de99dSChuanxiao Dong (ext_csd[139] << 24) + (ext_csd[138] << 16) + 385709de99dSChuanxiao Dong (ext_csd[137] << 8) + ext_csd[136]; 386709de99dSChuanxiao Dong if (mmc_card_blockaddr(card)) 387709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset <<= 9; 388709de99dSChuanxiao Dong /* 389709de99dSChuanxiao Dong * calculate the enhanced data area size, in kilobytes 390709de99dSChuanxiao Dong */ 391709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = 392709de99dSChuanxiao Dong (ext_csd[142] << 16) + (ext_csd[141] << 8) + 393709de99dSChuanxiao Dong ext_csd[140]; 394709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size *= 395709de99dSChuanxiao Dong (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); 396709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size <<= 9; 397709de99dSChuanxiao Dong } else { 398709de99dSChuanxiao Dong /* 399709de99dSChuanxiao Dong * If the enhanced area is not enabled, disable these 400709de99dSChuanxiao Dong * device attributes. 401709de99dSChuanxiao Dong */ 402709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 403709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 404709de99dSChuanxiao Dong } 405e0c368d5SNamjae Jeon 406e0c368d5SNamjae Jeon /* 407e0c368d5SNamjae Jeon * General purpose partition feature support -- 408e0c368d5SNamjae Jeon * If ext_csd has the size of general purpose partitions, 409e0c368d5SNamjae Jeon * set size, part_cfg, partition name in mmc_part. 410e0c368d5SNamjae Jeon */ 411e0c368d5SNamjae Jeon if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 412e0c368d5SNamjae Jeon EXT_CSD_PART_SUPPORT_PART_EN) { 413e0c368d5SNamjae Jeon if (card->ext_csd.enhanced_area_en != 1) { 414e0c368d5SNamjae Jeon hc_erase_grp_sz = 415e0c368d5SNamjae Jeon ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; 416e0c368d5SNamjae Jeon hc_wp_grp_sz = 417e0c368d5SNamjae Jeon ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 418e0c368d5SNamjae Jeon 419e0c368d5SNamjae Jeon card->ext_csd.enhanced_area_en = 1; 420e0c368d5SNamjae Jeon } 421e0c368d5SNamjae Jeon 422e0c368d5SNamjae Jeon for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { 423e0c368d5SNamjae Jeon if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && 424e0c368d5SNamjae Jeon !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && 425e0c368d5SNamjae Jeon !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) 426e0c368d5SNamjae Jeon continue; 427e0c368d5SNamjae Jeon part_size = 428e0c368d5SNamjae Jeon (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] 429e0c368d5SNamjae Jeon << 16) + 430e0c368d5SNamjae Jeon (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] 431e0c368d5SNamjae Jeon << 8) + 432e0c368d5SNamjae Jeon ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; 433e0c368d5SNamjae Jeon part_size *= (size_t)(hc_erase_grp_sz * 434e0c368d5SNamjae Jeon hc_wp_grp_sz); 435e0c368d5SNamjae Jeon mmc_part_add(card, part_size << 19, 436e0c368d5SNamjae Jeon EXT_CSD_PART_CONFIG_ACC_GP0 + idx, 437e0c368d5SNamjae Jeon "gp%d", idx, false); 438e0c368d5SNamjae Jeon } 439e0c368d5SNamjae Jeon } 440dfe86cbaSAdrian Hunter card->ext_csd.sec_trim_mult = 441dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_TRIM_MULT]; 442dfe86cbaSAdrian Hunter card->ext_csd.sec_erase_mult = 443dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_ERASE_MULT]; 444dfe86cbaSAdrian Hunter card->ext_csd.sec_feature_support = 445dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; 446dfe86cbaSAdrian Hunter card->ext_csd.trim_timeout = 300 * 447dfe86cbaSAdrian Hunter ext_csd[EXT_CSD_TRIM_MULT]; 448dfe86cbaSAdrian Hunter } 449dfe86cbaSAdrian Hunter 450b2499518SAdrian Hunter if (card->ext_csd.rev >= 5) { 451eb0d8f13SJaehoon Chung /* check whether the eMMC card supports HPI */ 452eb0d8f13SJaehoon Chung if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) { 453eb0d8f13SJaehoon Chung card->ext_csd.hpi = 1; 454eb0d8f13SJaehoon Chung if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) 455eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; 456eb0d8f13SJaehoon Chung else 457eb0d8f13SJaehoon Chung card->ext_csd.hpi_cmd = MMC_SEND_STATUS; 458eb0d8f13SJaehoon Chung /* 459eb0d8f13SJaehoon Chung * Indicate the maximum timeout to close 460eb0d8f13SJaehoon Chung * a command interrupted by HPI 461eb0d8f13SJaehoon Chung */ 462eb0d8f13SJaehoon Chung card->ext_csd.out_of_int_time = 463eb0d8f13SJaehoon Chung ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; 464eb0d8f13SJaehoon Chung } 465eb0d8f13SJaehoon Chung 466f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 467b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 468b2499518SAdrian Hunter } 469f4c5522bSAndrei Warkentin 4705238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 471dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 472dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 473dfe86cbaSAdrian Hunter else 474dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 475dfe86cbaSAdrian Hunter 476336c716aSSeungwon Jeon /* eMMC v4.5 or later */ 477bec8726aSGirish K S if (card->ext_csd.rev >= 6) { 478336c716aSSeungwon Jeon card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; 479336c716aSSeungwon Jeon 480b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 10 * 481b23cf0bdSSeungwon Jeon ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 482bec8726aSGirish K S card->ext_csd.power_off_longtime = 10 * 483bec8726aSGirish K S ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; 484b23cf0bdSSeungwon Jeon 485881d1c25SSeungwon Jeon card->ext_csd.cache_size = 486881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | 487881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | 488881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | 489881d1c25SSeungwon Jeon ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; 490336c716aSSeungwon Jeon } 491881d1c25SSeungwon Jeon 4927ea239d9SPierre Ossman out: 49308ee80ccSPhilip Rakity return err; 49408ee80ccSPhilip Rakity } 4957ea239d9SPierre Ossman 49608ee80ccSPhilip Rakity static inline void mmc_free_ext_csd(u8 *ext_csd) 49708ee80ccSPhilip Rakity { 49808ee80ccSPhilip Rakity kfree(ext_csd); 49908ee80ccSPhilip Rakity } 50008ee80ccSPhilip Rakity 50108ee80ccSPhilip Rakity 502f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 50308ee80ccSPhilip Rakity { 50408ee80ccSPhilip Rakity u8 *bw_ext_csd; 50508ee80ccSPhilip Rakity int err; 50608ee80ccSPhilip Rakity 507f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 508f39b2dd9SPhilip Rakity return 0; 50908ee80ccSPhilip Rakity 510f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 511f39b2dd9SPhilip Rakity 512f39b2dd9SPhilip Rakity if (err || bw_ext_csd == NULL) { 51308ee80ccSPhilip Rakity if (bus_width != MMC_BUS_WIDTH_1) 51408ee80ccSPhilip Rakity err = -EINVAL; 51508ee80ccSPhilip Rakity goto out; 51608ee80ccSPhilip Rakity } 51708ee80ccSPhilip Rakity 51808ee80ccSPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 51908ee80ccSPhilip Rakity goto out; 52008ee80ccSPhilip Rakity 52108ee80ccSPhilip Rakity /* only compare read only fields */ 522f39b2dd9SPhilip Rakity err = (!(card->ext_csd.raw_partition_support == 52308ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 524f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 52508ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 526f39b2dd9SPhilip Rakity (card->ext_csd.rev == 52708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 528f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 52908ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 530f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 53108ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 532f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 53308ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 534f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 53508ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 536f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 53708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 538f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 53908ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 540f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 54108ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 542f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 54308ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 544f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 54508ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 546f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 54708ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 548f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 549f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 550f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 551f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 552f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 553f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 554f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 555f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 3])); 55608ee80ccSPhilip Rakity if (err) 55708ee80ccSPhilip Rakity err = -EINVAL; 55808ee80ccSPhilip Rakity 55908ee80ccSPhilip Rakity out: 56008ee80ccSPhilip Rakity mmc_free_ext_csd(bw_ext_csd); 5617ea239d9SPierre Ossman return err; 5627ea239d9SPierre Ossman } 5637ea239d9SPierre Ossman 56451ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 56551ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 56651ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 56751ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 56851ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 569dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 570dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 57151ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 57251ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 57351ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 57451ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 57551ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 57651ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 577709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 578709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 579709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 58051ec92e2SPierre Ossman 58151ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 58251ec92e2SPierre Ossman &dev_attr_cid.attr, 58351ec92e2SPierre Ossman &dev_attr_csd.attr, 58451ec92e2SPierre Ossman &dev_attr_date.attr, 585dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 586dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 58751ec92e2SPierre Ossman &dev_attr_fwrev.attr, 58851ec92e2SPierre Ossman &dev_attr_hwrev.attr, 58951ec92e2SPierre Ossman &dev_attr_manfid.attr, 59051ec92e2SPierre Ossman &dev_attr_name.attr, 59151ec92e2SPierre Ossman &dev_attr_oemid.attr, 59251ec92e2SPierre Ossman &dev_attr_serial.attr, 593709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 594709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 59551ec92e2SPierre Ossman NULL, 59651ec92e2SPierre Ossman }; 59751ec92e2SPierre Ossman 59851ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 59951ec92e2SPierre Ossman .attrs = mmc_std_attrs, 60051ec92e2SPierre Ossman }; 60151ec92e2SPierre Ossman 602a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 60351ec92e2SPierre Ossman &mmc_std_attr_group, 60451ec92e2SPierre Ossman NULL, 60551ec92e2SPierre Ossman }; 60651ec92e2SPierre Ossman 60751ec92e2SPierre Ossman static struct device_type mmc_type = { 60851ec92e2SPierre Ossman .groups = mmc_attr_groups, 60951ec92e2SPierre Ossman }; 61051ec92e2SPierre Ossman 6117ea239d9SPierre Ossman /* 612b87d8dbfSGirish K S * Select the PowerClass for the current bus width 613b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 614b87d8dbfSGirish K S * extended CSD register, select it by executing the 615b87d8dbfSGirish K S * mmc_switch command. 616b87d8dbfSGirish K S */ 617b87d8dbfSGirish K S static int mmc_select_powerclass(struct mmc_card *card, 618b87d8dbfSGirish K S unsigned int bus_width, u8 *ext_csd) 619b87d8dbfSGirish K S { 620b87d8dbfSGirish K S int err = 0; 621b87d8dbfSGirish K S unsigned int pwrclass_val; 622b87d8dbfSGirish K S unsigned int index = 0; 623b87d8dbfSGirish K S struct mmc_host *host; 624b87d8dbfSGirish K S 625b87d8dbfSGirish K S BUG_ON(!card); 626b87d8dbfSGirish K S 627b87d8dbfSGirish K S host = card->host; 628b87d8dbfSGirish K S BUG_ON(!host); 629b87d8dbfSGirish K S 630b87d8dbfSGirish K S if (ext_csd == NULL) 631b87d8dbfSGirish K S return 0; 632b87d8dbfSGirish K S 633b87d8dbfSGirish K S /* Power class selection is supported for versions >= 4.0 */ 634b87d8dbfSGirish K S if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 635b87d8dbfSGirish K S return 0; 636b87d8dbfSGirish K S 637b87d8dbfSGirish K S /* Power class values are defined only for 4/8 bit bus */ 638b87d8dbfSGirish K S if (bus_width == EXT_CSD_BUS_WIDTH_1) 639b87d8dbfSGirish K S return 0; 640b87d8dbfSGirish K S 641b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 642b87d8dbfSGirish K S case MMC_VDD_165_195: 643b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 644b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_195; 645b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 646b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 647b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_195 : 648b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_195; 649b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 650b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_195; 651b87d8dbfSGirish K S break; 652b87d8dbfSGirish K S case MMC_VDD_32_33: 653b87d8dbfSGirish K S case MMC_VDD_33_34: 654b87d8dbfSGirish K S case MMC_VDD_34_35: 655b87d8dbfSGirish K S case MMC_VDD_35_36: 656b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 657b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_360; 658b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 659b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 660b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_360 : 661b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_360; 662b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 663b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_360; 664b87d8dbfSGirish K S break; 665b87d8dbfSGirish K S default: 666b87d8dbfSGirish K S pr_warning("%s: Voltage range not supported " 667b87d8dbfSGirish K S "for power class.\n", mmc_hostname(host)); 668b87d8dbfSGirish K S return -EINVAL; 669b87d8dbfSGirish K S } 670b87d8dbfSGirish K S 671b87d8dbfSGirish K S pwrclass_val = ext_csd[index]; 672b87d8dbfSGirish K S 673b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 674b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 675b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 676b87d8dbfSGirish K S else 677b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 678b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 679b87d8dbfSGirish K S 680b87d8dbfSGirish K S /* If the power class is different from the default value */ 681b87d8dbfSGirish K S if (pwrclass_val > 0) { 682b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 683b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 684b87d8dbfSGirish K S pwrclass_val, 68571fe3eb0SSeungwon Jeon card->ext_csd.generic_cmd6_time); 686b87d8dbfSGirish K S } 687b87d8dbfSGirish K S 688b87d8dbfSGirish K S return err; 689b87d8dbfSGirish K S } 690b87d8dbfSGirish K S 691b87d8dbfSGirish K S /* 6926abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 6936abaa0c9SPierre Ossman * 6948769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 6956abaa0c9SPierre Ossman * we're trying to reinitialise. 6967ea239d9SPierre Ossman */ 6978c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 6986abaa0c9SPierre Ossman struct mmc_card *oldcard) 6997ea239d9SPierre Ossman { 7007ea239d9SPierre Ossman struct mmc_card *card; 70125d5c699SPhilip Rakity int err, ddr = 0; 7027ea239d9SPierre Ossman u32 cid[4]; 7037ea239d9SPierre Ossman unsigned int max_dtr; 704b676f039SPhilip Rakity u32 rocr; 70508ee80ccSPhilip Rakity u8 *ext_csd = NULL; 7067ea239d9SPierre Ossman 7077ea239d9SPierre Ossman BUG_ON(!host); 708d84075c8SPierre Ossman WARN_ON(!host->claimed); 7097ea239d9SPierre Ossman 71044669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 71144669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 71244669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 71344669034SStefan Nilsson XK 7147ea239d9SPierre Ossman /* 7157ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 7167ea239d9SPierre Ossman * need to tell some cards to go back to the idle 7177ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 7187ea239d9SPierre Ossman * respond. 719c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 7207ea239d9SPierre Ossman */ 7217ea239d9SPierre Ossman mmc_go_idle(host); 7227ea239d9SPierre Ossman 7237ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 724b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 72517b0429dSPierre Ossman if (err) 7266abaa0c9SPierre Ossman goto err; 7277ea239d9SPierre Ossman 7287ea239d9SPierre Ossman /* 729af517150SDavid Brownell * For SPI, enable CRC as appropriate. 730af517150SDavid Brownell */ 731af517150SDavid Brownell if (mmc_host_is_spi(host)) { 732af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 733af517150SDavid Brownell if (err) 734af517150SDavid Brownell goto err; 735af517150SDavid Brownell } 736af517150SDavid Brownell 737af517150SDavid Brownell /* 7387ea239d9SPierre Ossman * Fetch CID from card. 7397ea239d9SPierre Ossman */ 740af517150SDavid Brownell if (mmc_host_is_spi(host)) 741af517150SDavid Brownell err = mmc_send_cid(host, cid); 742af517150SDavid Brownell else 7437ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 74417b0429dSPierre Ossman if (err) 7457ea239d9SPierre Ossman goto err; 7467ea239d9SPierre Ossman 7476abaa0c9SPierre Ossman if (oldcard) { 748adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 749adf66a0dSPierre Ossman err = -ENOENT; 7506abaa0c9SPierre Ossman goto err; 751adf66a0dSPierre Ossman } 7526abaa0c9SPierre Ossman 7536abaa0c9SPierre Ossman card = oldcard; 7546abaa0c9SPierre Ossman } else { 7557ea239d9SPierre Ossman /* 7567ea239d9SPierre Ossman * Allocate card structure. 7577ea239d9SPierre Ossman */ 75851ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 759adf66a0dSPierre Ossman if (IS_ERR(card)) { 760adf66a0dSPierre Ossman err = PTR_ERR(card); 7617ea239d9SPierre Ossman goto err; 762adf66a0dSPierre Ossman } 7637ea239d9SPierre Ossman 7647ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 7657ea239d9SPierre Ossman card->rca = 1; 7667ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 7676abaa0c9SPierre Ossman } 7687ea239d9SPierre Ossman 7697ea239d9SPierre Ossman /* 770af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 7717ea239d9SPierre Ossman */ 772af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 7737ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 77417b0429dSPierre Ossman if (err) 7757ea239d9SPierre Ossman goto free_card; 7767ea239d9SPierre Ossman 7777ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 778af517150SDavid Brownell } 7797ea239d9SPierre Ossman 7806abaa0c9SPierre Ossman if (!oldcard) { 7817ea239d9SPierre Ossman /* 7827ea239d9SPierre Ossman * Fetch CSD from card. 7837ea239d9SPierre Ossman */ 7847ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 78517b0429dSPierre Ossman if (err) 7867ea239d9SPierre Ossman goto free_card; 7877ea239d9SPierre Ossman 788bd766312SPierre Ossman err = mmc_decode_csd(card); 789adf66a0dSPierre Ossman if (err) 790bd766312SPierre Ossman goto free_card; 791bd766312SPierre Ossman err = mmc_decode_cid(card); 792adf66a0dSPierre Ossman if (err) 793bd766312SPierre Ossman goto free_card; 7946abaa0c9SPierre Ossman } 7957ea239d9SPierre Ossman 7967ea239d9SPierre Ossman /* 79789a73cf5SPierre Ossman * Select card, as all following commands rely on that. 7987ea239d9SPierre Ossman */ 799af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 8007ea239d9SPierre Ossman err = mmc_select_card(card); 80117b0429dSPierre Ossman if (err) 8027ea239d9SPierre Ossman goto free_card; 803af517150SDavid Brownell } 8047ea239d9SPierre Ossman 8056abaa0c9SPierre Ossman if (!oldcard) { 80689a73cf5SPierre Ossman /* 807af517150SDavid Brownell * Fetch and process extended CSD. 80889a73cf5SPierre Ossman */ 80908ee80ccSPhilip Rakity 81008ee80ccSPhilip Rakity err = mmc_get_ext_csd(card, &ext_csd); 81108ee80ccSPhilip Rakity if (err) 81208ee80ccSPhilip Rakity goto free_card; 81308ee80ccSPhilip Rakity err = mmc_read_ext_csd(card, ext_csd); 81417b0429dSPierre Ossman if (err) 8157ea239d9SPierre Ossman goto free_card; 816b676f039SPhilip Rakity 817b676f039SPhilip Rakity /* If doing byte addressing, check if required to do sector 818b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 819b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 820b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 821b676f039SPhilip Rakity */ 822b676f039SPhilip Rakity if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) 823b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 824b676f039SPhilip Rakity 825dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 826dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 8276abaa0c9SPierre Ossman } 8287ea239d9SPierre Ossman 8297ea239d9SPierre Ossman /* 830709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 831709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 832709de99dSChuanxiao Dong */ 833709de99dSChuanxiao Dong if (card->ext_csd.enhanced_area_en) { 834709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 835b23cf0bdSSeungwon Jeon EXT_CSD_ERASE_GROUP_DEF, 1, 836b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 837709de99dSChuanxiao Dong 838709de99dSChuanxiao Dong if (err && err != -EBADMSG) 839709de99dSChuanxiao Dong goto free_card; 840709de99dSChuanxiao Dong 841709de99dSChuanxiao Dong if (err) { 842709de99dSChuanxiao Dong err = 0; 843709de99dSChuanxiao Dong /* 844709de99dSChuanxiao Dong * Just disable enhanced area off & sz 845709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 846709de99dSChuanxiao Dong * during next time reinit 847709de99dSChuanxiao Dong */ 848709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 849709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 850709de99dSChuanxiao Dong } else { 851709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 852709de99dSChuanxiao Dong /* 853709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 854709de99dSChuanxiao Dong * This will affect the erase size, so 855709de99dSChuanxiao Dong * here need to reset erase size 856709de99dSChuanxiao Dong */ 857709de99dSChuanxiao Dong mmc_set_erase_size(card); 858709de99dSChuanxiao Dong } 859709de99dSChuanxiao Dong } 860709de99dSChuanxiao Dong 861709de99dSChuanxiao Dong /* 86241e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 86341e2a489SPhilip Rakity */ 864371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 865371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 866371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 867371a689fSAndrei Warkentin card->ext_csd.part_config, 868371a689fSAndrei Warkentin card->ext_csd.part_time); 869371a689fSAndrei Warkentin if (err && err != -EBADMSG) 870371a689fSAndrei Warkentin goto free_card; 87141e2a489SPhilip Rakity } 87241e2a489SPhilip Rakity 87341e2a489SPhilip Rakity /* 874bec8726aSGirish K S * If the host supports the power_off_notify capability then 875bec8726aSGirish K S * set the notification byte in the ext_csd register of device 876bec8726aSGirish K S */ 877bec8726aSGirish K S if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) && 878bec8726aSGirish K S (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) { 879bec8726aSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 880bec8726aSGirish K S EXT_CSD_POWER_OFF_NOTIFICATION, 881bec8726aSGirish K S EXT_CSD_POWER_ON, 882bec8726aSGirish K S card->ext_csd.generic_cmd6_time); 883bec8726aSGirish K S if (err && err != -EBADMSG) 884bec8726aSGirish K S goto free_card; 885bec8726aSGirish K S } 886bec8726aSGirish K S 887bec8726aSGirish K S if (!err) 888bec8726aSGirish K S card->poweroff_notify_state = MMC_POWERED_ON; 889bec8726aSGirish K S 890bec8726aSGirish K S /* 89189a73cf5SPierre Ossman * Activate high speed (if supported) 89289a73cf5SPierre Ossman */ 89389a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 89489a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 89589a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 896b23cf0bdSSeungwon Jeon EXT_CSD_HS_TIMING, 1, 897b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 898ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 89989a73cf5SPierre Ossman goto free_card; 90089a73cf5SPierre Ossman 901ef0b27d4SAdrian Hunter if (err) { 902a3c76eb9SGirish K S pr_warning("%s: switch to highspeed failed\n", 903ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 904ef0b27d4SAdrian Hunter err = 0; 905ef0b27d4SAdrian Hunter } else { 90689a73cf5SPierre Ossman mmc_card_set_highspeed(card); 90789a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 90889a73cf5SPierre Ossman } 909ef0b27d4SAdrian Hunter } 91089a73cf5SPierre Ossman 91189a73cf5SPierre Ossman /* 912eb0d8f13SJaehoon Chung * Enable HPI feature (if supported) 913eb0d8f13SJaehoon Chung */ 914eb0d8f13SJaehoon Chung if (card->ext_csd.hpi) { 915eb0d8f13SJaehoon Chung err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 916eb0d8f13SJaehoon Chung EXT_CSD_HPI_MGMT, 1, 0); 917eb0d8f13SJaehoon Chung if (err && err != -EBADMSG) 918eb0d8f13SJaehoon Chung goto free_card; 919eb0d8f13SJaehoon Chung if (err) { 920eb0d8f13SJaehoon Chung pr_warning("%s: Enabling HPI failed\n", 921eb0d8f13SJaehoon Chung mmc_hostname(card->host)); 922eb0d8f13SJaehoon Chung err = 0; 923eb0d8f13SJaehoon Chung } else 924eb0d8f13SJaehoon Chung card->ext_csd.hpi_en = 1; 925eb0d8f13SJaehoon Chung } 926eb0d8f13SJaehoon Chung 927eb0d8f13SJaehoon Chung /* 9287ea239d9SPierre Ossman * Compute bus speed. 9297ea239d9SPierre Ossman */ 9307ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 9317ea239d9SPierre Ossman 9327ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 9337ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 9347ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 9357ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 9367ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 9377ea239d9SPierre Ossman } 9387ea239d9SPierre Ossman 9397ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 9407ea239d9SPierre Ossman 94189a73cf5SPierre Ossman /* 9420f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 943dfc13e84SHanumath Prasad */ 944dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 945dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 9464c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_8V_DDR | 9474c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 9484c4cb171SPhilip Rakity == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50))) 94949e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 950dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 9514c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_2V_DDR | 9524c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 9534c4cb171SPhilip Rakity == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50))) 95449e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 955dfc13e84SHanumath Prasad } 956dfc13e84SHanumath Prasad 957dfc13e84SHanumath Prasad /* 9580f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 95989a73cf5SPierre Ossman */ 96089a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 961b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 96222113efdSAries Lee static unsigned ext_csd_bits[][2] = { 96322113efdSAries Lee { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, 96422113efdSAries Lee { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, 96522113efdSAries Lee { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, 96622113efdSAries Lee }; 96722113efdSAries Lee static unsigned bus_widths[] = { 96822113efdSAries Lee MMC_BUS_WIDTH_8, 96922113efdSAries Lee MMC_BUS_WIDTH_4, 97022113efdSAries Lee MMC_BUS_WIDTH_1 97122113efdSAries Lee }; 97222113efdSAries Lee unsigned idx, bus_width = 0; 973b30f8af3SJarkko Lavinen 97422113efdSAries Lee if (host->caps & MMC_CAP_8_BIT_DATA) 97522113efdSAries Lee idx = 0; 976dfc13e84SHanumath Prasad else 97722113efdSAries Lee idx = 1; 97822113efdSAries Lee for (; idx < ARRAY_SIZE(bus_widths); idx++) { 97922113efdSAries Lee bus_width = bus_widths[idx]; 98022113efdSAries Lee if (bus_width == MMC_BUS_WIDTH_1) 98122113efdSAries Lee ddr = 0; /* no DDR for 1-bit width */ 982b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][0], 983b87d8dbfSGirish K S ext_csd); 984b87d8dbfSGirish K S if (err) 985b87d8dbfSGirish K S pr_err("%s: power class selection to " 986b87d8dbfSGirish K S "bus width %d failed\n", 987b87d8dbfSGirish K S mmc_hostname(card->host), 988b87d8dbfSGirish K S 1 << bus_width); 989b87d8dbfSGirish K S 99022113efdSAries Lee err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 99122113efdSAries Lee EXT_CSD_BUS_WIDTH, 992d3a8d95dSAndrei Warkentin ext_csd_bits[idx][0], 993b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 99422113efdSAries Lee if (!err) { 9954c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 99608ee80ccSPhilip Rakity 99722113efdSAries Lee /* 99822113efdSAries Lee * If controller can't handle bus width test, 99908ee80ccSPhilip Rakity * compare ext_csd previously read in 1 bit mode 100008ee80ccSPhilip Rakity * against ext_csd at new bus width 100122113efdSAries Lee */ 100222113efdSAries Lee if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 100308ee80ccSPhilip Rakity err = mmc_compare_ext_csds(card, 100408ee80ccSPhilip Rakity bus_width); 100508ee80ccSPhilip Rakity else 100622113efdSAries Lee err = mmc_bus_test(card, bus_width); 100722113efdSAries Lee if (!err) 100822113efdSAries Lee break; 100922113efdSAries Lee } 1010b30f8af3SJarkko Lavinen } 1011b30f8af3SJarkko Lavinen 101222113efdSAries Lee if (!err && ddr) { 1013b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][1], 1014b87d8dbfSGirish K S ext_csd); 1015b87d8dbfSGirish K S if (err) 1016b87d8dbfSGirish K S pr_err("%s: power class selection to " 1017b87d8dbfSGirish K S "bus width %d ddr %d failed\n", 1018b87d8dbfSGirish K S mmc_hostname(card->host), 1019b87d8dbfSGirish K S 1 << bus_width, ddr); 1020b87d8dbfSGirish K S 102189a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 102222113efdSAries Lee EXT_CSD_BUS_WIDTH, 1023d3a8d95dSAndrei Warkentin ext_csd_bits[idx][1], 1024b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 102522113efdSAries Lee } 1026ef0b27d4SAdrian Hunter if (err) { 1027a3c76eb9SGirish K S pr_warning("%s: switch to bus width %d ddr %d " 1028ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 10290f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 103022113efdSAries Lee goto free_card; 103122113efdSAries Lee } else if (ddr) { 10324c4cb171SPhilip Rakity /* 10334c4cb171SPhilip Rakity * eMMC cards can support 3.3V to 1.2V i/o (vccq) 10344c4cb171SPhilip Rakity * signaling. 10354c4cb171SPhilip Rakity * 10364c4cb171SPhilip Rakity * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 10374c4cb171SPhilip Rakity * 10384c4cb171SPhilip Rakity * 1.8V vccq at 3.3V core voltage (vcc) is not required 10394c4cb171SPhilip Rakity * in the JEDEC spec for DDR. 10404c4cb171SPhilip Rakity * 10414c4cb171SPhilip Rakity * Do not force change in vccq since we are obviously 10424c4cb171SPhilip Rakity * working and no change to vccq is needed. 10434c4cb171SPhilip Rakity * 10444c4cb171SPhilip Rakity * WARNING: eMMC rules are NOT the same as SD DDR 10454c4cb171SPhilip Rakity */ 10464c4cb171SPhilip Rakity if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) { 10474c4cb171SPhilip Rakity err = mmc_set_signal_voltage(host, 10484c4cb171SPhilip Rakity MMC_SIGNAL_VOLTAGE_120, 0); 10494c4cb171SPhilip Rakity if (err) 10504c4cb171SPhilip Rakity goto err; 10514c4cb171SPhilip Rakity } 10520f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 10534c4cb171SPhilip Rakity mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50); 10544c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 105589a73cf5SPierre Ossman } 1056ef0b27d4SAdrian Hunter } 105789a73cf5SPierre Ossman 1058881d1c25SSeungwon Jeon /* 1059881d1c25SSeungwon Jeon * If cache size is higher than 0, this indicates 1060881d1c25SSeungwon Jeon * the existence of cache and it can be turned on. 1061881d1c25SSeungwon Jeon */ 1062881d1c25SSeungwon Jeon if ((host->caps2 & MMC_CAP2_CACHE_CTRL) && 1063881d1c25SSeungwon Jeon card->ext_csd.cache_size > 0) { 1064881d1c25SSeungwon Jeon err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 1065881d1c25SSeungwon Jeon EXT_CSD_CACHE_CTRL, 1, 0); 1066881d1c25SSeungwon Jeon if (err && err != -EBADMSG) 1067881d1c25SSeungwon Jeon goto free_card; 1068881d1c25SSeungwon Jeon 1069881d1c25SSeungwon Jeon /* 1070881d1c25SSeungwon Jeon * Only if no error, cache is turned on successfully. 1071881d1c25SSeungwon Jeon */ 1072881d1c25SSeungwon Jeon card->ext_csd.cache_ctrl = err ? 0 : 1; 1073881d1c25SSeungwon Jeon } 1074881d1c25SSeungwon Jeon 10756abaa0c9SPierre Ossman if (!oldcard) 10767ea239d9SPierre Ossman host->card = card; 10777ea239d9SPierre Ossman 107808ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 107917b0429dSPierre Ossman return 0; 10806abaa0c9SPierre Ossman 10816abaa0c9SPierre Ossman free_card: 10826abaa0c9SPierre Ossman if (!oldcard) 10836abaa0c9SPierre Ossman mmc_remove_card(card); 10846abaa0c9SPierre Ossman err: 108508ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 10866abaa0c9SPierre Ossman 1087adf66a0dSPierre Ossman return err; 10886abaa0c9SPierre Ossman } 10896abaa0c9SPierre Ossman 10906abaa0c9SPierre Ossman /* 10916abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 10926abaa0c9SPierre Ossman */ 10936abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 10946abaa0c9SPierre Ossman { 10956abaa0c9SPierre Ossman BUG_ON(!host); 10966abaa0c9SPierre Ossman BUG_ON(!host->card); 10976abaa0c9SPierre Ossman 10986abaa0c9SPierre Ossman mmc_remove_card(host->card); 10996abaa0c9SPierre Ossman host->card = NULL; 11006abaa0c9SPierre Ossman } 11016abaa0c9SPierre Ossman 11026abaa0c9SPierre Ossman /* 11036abaa0c9SPierre Ossman * Card detection callback from host. 11046abaa0c9SPierre Ossman */ 11056abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 11066abaa0c9SPierre Ossman { 11076abaa0c9SPierre Ossman int err; 11086abaa0c9SPierre Ossman 11096abaa0c9SPierre Ossman BUG_ON(!host); 11106abaa0c9SPierre Ossman BUG_ON(!host->card); 11116abaa0c9SPierre Ossman 11126abaa0c9SPierre Ossman mmc_claim_host(host); 11136abaa0c9SPierre Ossman 11146abaa0c9SPierre Ossman /* 11156abaa0c9SPierre Ossman * Just check if our card has been removed. 11166abaa0c9SPierre Ossman */ 11176abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 11186abaa0c9SPierre Ossman 11197ea239d9SPierre Ossman mmc_release_host(host); 11207ea239d9SPierre Ossman 112117b0429dSPierre Ossman if (err) { 11224101c16aSPierre Ossman mmc_remove(host); 11236abaa0c9SPierre Ossman 11246abaa0c9SPierre Ossman mmc_claim_host(host); 11256abaa0c9SPierre Ossman mmc_detach_bus(host); 11267f7e4129SUlf Hansson mmc_power_off(host); 11276abaa0c9SPierre Ossman mmc_release_host(host); 11286abaa0c9SPierre Ossman } 11296abaa0c9SPierre Ossman } 11306abaa0c9SPierre Ossman 11316abaa0c9SPierre Ossman /* 11326abaa0c9SPierre Ossman * Suspend callback from host. 11336abaa0c9SPierre Ossman */ 113495cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 11356abaa0c9SPierre Ossman { 1136c3805467SBalaji T K int err = 0; 1137c3805467SBalaji T K 11386abaa0c9SPierre Ossman BUG_ON(!host); 11396abaa0c9SPierre Ossman BUG_ON(!host->card); 11406abaa0c9SPierre Ossman 11416abaa0c9SPierre Ossman mmc_claim_host(host); 1142c3805467SBalaji T K if (mmc_card_can_sleep(host)) 1143c3805467SBalaji T K err = mmc_card_sleep(host); 1144c3805467SBalaji T K else if (!mmc_host_is_spi(host)) 11456abaa0c9SPierre Ossman mmc_deselect_cards(host); 11466abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 11476abaa0c9SPierre Ossman mmc_release_host(host); 114895cdfb72SNicolas Pitre 1149c3805467SBalaji T K return err; 11506abaa0c9SPierre Ossman } 11516abaa0c9SPierre Ossman 11526abaa0c9SPierre Ossman /* 11536abaa0c9SPierre Ossman * Resume callback from host. 11546abaa0c9SPierre Ossman * 11556abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11566abaa0c9SPierre Ossman * and, if so, restore all state to it. 11576abaa0c9SPierre Ossman */ 115895cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 11596abaa0c9SPierre Ossman { 11606abaa0c9SPierre Ossman int err; 11616abaa0c9SPierre Ossman 11626abaa0c9SPierre Ossman BUG_ON(!host); 11636abaa0c9SPierre Ossman BUG_ON(!host->card); 11646abaa0c9SPierre Ossman 11656abaa0c9SPierre Ossman mmc_claim_host(host); 11668c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 11672986d0bfSPierre Ossman mmc_release_host(host); 11682986d0bfSPierre Ossman 116995cdfb72SNicolas Pitre return err; 11706abaa0c9SPierre Ossman } 11716abaa0c9SPierre Ossman 117212ae637fSOhad Ben-Cohen static int mmc_power_restore(struct mmc_host *host) 1173eae1aeeeSAdrian Hunter { 117412ae637fSOhad Ben-Cohen int ret; 117512ae637fSOhad Ben-Cohen 1176eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 1177eae1aeeeSAdrian Hunter mmc_claim_host(host); 117812ae637fSOhad Ben-Cohen ret = mmc_init_card(host, host->ocr, host->card); 1179eae1aeeeSAdrian Hunter mmc_release_host(host); 118012ae637fSOhad Ben-Cohen 118112ae637fSOhad Ben-Cohen return ret; 1182eae1aeeeSAdrian Hunter } 1183eae1aeeeSAdrian Hunter 1184b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 1185b1ebe384SJarkko Lavinen { 1186b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1187b1ebe384SJarkko Lavinen int err = -ENOSYS; 1188b1ebe384SJarkko Lavinen 1189b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1190b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 1191b1ebe384SJarkko Lavinen if (err < 0) 1192b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 1193b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1194b1ebe384SJarkko Lavinen } 1195b1ebe384SJarkko Lavinen 1196b1ebe384SJarkko Lavinen return err; 1197b1ebe384SJarkko Lavinen } 1198b1ebe384SJarkko Lavinen 1199b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 1200b1ebe384SJarkko Lavinen { 1201b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1202b1ebe384SJarkko Lavinen int err = -ENOSYS; 1203b1ebe384SJarkko Lavinen 1204b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1205b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 1206b1ebe384SJarkko Lavinen if (err < 0) 1207b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 1208b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1209b1ebe384SJarkko Lavinen } 1210b1ebe384SJarkko Lavinen 1211b1ebe384SJarkko Lavinen return err; 1212b1ebe384SJarkko Lavinen } 1213b1ebe384SJarkko Lavinen 12149feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 1215b1ebe384SJarkko Lavinen .awake = mmc_awake, 1216b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 12179feae246SAdrian Hunter .remove = mmc_remove, 12189feae246SAdrian Hunter .detect = mmc_detect, 12199feae246SAdrian Hunter .suspend = NULL, 12209feae246SAdrian Hunter .resume = NULL, 1221eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 12229feae246SAdrian Hunter }; 12239feae246SAdrian Hunter 12249feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 1225b1ebe384SJarkko Lavinen .awake = mmc_awake, 1226b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 12279feae246SAdrian Hunter .remove = mmc_remove, 12289feae246SAdrian Hunter .detect = mmc_detect, 12299feae246SAdrian Hunter .suspend = mmc_suspend, 12309feae246SAdrian Hunter .resume = mmc_resume, 1231eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 12329feae246SAdrian Hunter }; 12339feae246SAdrian Hunter 12349feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 12359feae246SAdrian Hunter { 12369feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 12379feae246SAdrian Hunter 123871d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 12399feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 12409feae246SAdrian Hunter else 12419feae246SAdrian Hunter bus_ops = &mmc_ops; 12429feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 12439feae246SAdrian Hunter } 12449feae246SAdrian Hunter 12456abaa0c9SPierre Ossman /* 12466abaa0c9SPierre Ossman * Starting point for MMC card init. 12476abaa0c9SPierre Ossman */ 1248807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 12496abaa0c9SPierre Ossman { 12506abaa0c9SPierre Ossman int err; 1251807e8e40SAndy Ross u32 ocr; 12526abaa0c9SPierre Ossman 12536abaa0c9SPierre Ossman BUG_ON(!host); 1254d84075c8SPierre Ossman WARN_ON(!host->claimed); 12556abaa0c9SPierre Ossman 125644669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 125744669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 125844669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 125944669034SStefan Nilsson XK 1260807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 1261807e8e40SAndy Ross if (err) 1262807e8e40SAndy Ross return err; 1263807e8e40SAndy Ross 12649feae246SAdrian Hunter mmc_attach_bus_ops(host); 12658f230f45STakashi Iwai if (host->ocr_avail_mmc) 12668f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 12676abaa0c9SPierre Ossman 12686abaa0c9SPierre Ossman /* 1269af517150SDavid Brownell * We need to get OCR a different way for SPI. 1270af517150SDavid Brownell */ 1271af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1272af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 1273af517150SDavid Brownell if (err) 1274af517150SDavid Brownell goto err; 1275af517150SDavid Brownell } 1276af517150SDavid Brownell 1277af517150SDavid Brownell /* 12786abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 12796abaa0c9SPierre Ossman * support. 12806abaa0c9SPierre Ossman */ 12816abaa0c9SPierre Ossman if (ocr & 0x7F) { 1282a3c76eb9SGirish K S pr_warning("%s: card claims to support voltages " 12836abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 12846abaa0c9SPierre Ossman mmc_hostname(host)); 12856abaa0c9SPierre Ossman ocr &= ~0x7F; 12866abaa0c9SPierre Ossman } 12876abaa0c9SPierre Ossman 12886abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 12896abaa0c9SPierre Ossman 12906abaa0c9SPierre Ossman /* 12916abaa0c9SPierre Ossman * Can we support the voltage of the card? 12926abaa0c9SPierre Ossman */ 1293109b5bedSPierre Ossman if (!host->ocr) { 1294109b5bedSPierre Ossman err = -EINVAL; 12956abaa0c9SPierre Ossman goto err; 1296109b5bedSPierre Ossman } 12976abaa0c9SPierre Ossman 12986abaa0c9SPierre Ossman /* 12996abaa0c9SPierre Ossman * Detect and init the card. 13006abaa0c9SPierre Ossman */ 13018c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 130217b0429dSPierre Ossman if (err) 13036abaa0c9SPierre Ossman goto err; 13046abaa0c9SPierre Ossman 13056abaa0c9SPierre Ossman mmc_release_host(host); 13064101c16aSPierre Ossman err = mmc_add_card(host->card); 1307807e8e40SAndy Ross mmc_claim_host(host); 13087ea239d9SPierre Ossman if (err) 13092986d0bfSPierre Ossman goto remove_card; 13107ea239d9SPierre Ossman 13117ea239d9SPierre Ossman return 0; 13127ea239d9SPierre Ossman 13132986d0bfSPierre Ossman remove_card: 1314807e8e40SAndy Ross mmc_release_host(host); 13156abaa0c9SPierre Ossman mmc_remove_card(host->card); 13162986d0bfSPierre Ossman mmc_claim_host(host); 1317807e8e40SAndy Ross host->card = NULL; 13187ea239d9SPierre Ossman err: 13197ea239d9SPierre Ossman mmc_detach_bus(host); 13207ea239d9SPierre Ossman 1321a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising MMC card\n", 1322109b5bedSPierre Ossman mmc_hostname(host), err); 1323109b5bedSPierre Ossman 1324adf66a0dSPierre Ossman return err; 13257ea239d9SPierre Ossman } 1326