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) { 451f4c5522bSAndrei Warkentin card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; 452b2499518SAdrian Hunter card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; 453b2499518SAdrian Hunter } 454f4c5522bSAndrei Warkentin 4555238acbeSAndrei Warkentin card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; 456dfe86cbaSAdrian Hunter if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) 457dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 458dfe86cbaSAdrian Hunter else 459dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 460dfe86cbaSAdrian Hunter 461b23cf0bdSSeungwon Jeon if (card->ext_csd.rev >= 6) 462b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 10 * 463b23cf0bdSSeungwon Jeon ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; 464b23cf0bdSSeungwon Jeon else 465b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time = 0; 466b23cf0bdSSeungwon Jeon 4677ea239d9SPierre Ossman out: 46808ee80ccSPhilip Rakity return err; 46908ee80ccSPhilip Rakity } 4707ea239d9SPierre Ossman 47108ee80ccSPhilip Rakity static inline void mmc_free_ext_csd(u8 *ext_csd) 47208ee80ccSPhilip Rakity { 47308ee80ccSPhilip Rakity kfree(ext_csd); 47408ee80ccSPhilip Rakity } 47508ee80ccSPhilip Rakity 47608ee80ccSPhilip Rakity 477f39b2dd9SPhilip Rakity static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) 47808ee80ccSPhilip Rakity { 47908ee80ccSPhilip Rakity u8 *bw_ext_csd; 48008ee80ccSPhilip Rakity int err; 48108ee80ccSPhilip Rakity 482f39b2dd9SPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 483f39b2dd9SPhilip Rakity return 0; 48408ee80ccSPhilip Rakity 485f39b2dd9SPhilip Rakity err = mmc_get_ext_csd(card, &bw_ext_csd); 486f39b2dd9SPhilip Rakity 487f39b2dd9SPhilip Rakity if (err || bw_ext_csd == NULL) { 48808ee80ccSPhilip Rakity if (bus_width != MMC_BUS_WIDTH_1) 48908ee80ccSPhilip Rakity err = -EINVAL; 49008ee80ccSPhilip Rakity goto out; 49108ee80ccSPhilip Rakity } 49208ee80ccSPhilip Rakity 49308ee80ccSPhilip Rakity if (bus_width == MMC_BUS_WIDTH_1) 49408ee80ccSPhilip Rakity goto out; 49508ee80ccSPhilip Rakity 49608ee80ccSPhilip Rakity /* only compare read only fields */ 497f39b2dd9SPhilip Rakity err = (!(card->ext_csd.raw_partition_support == 49808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && 499f39b2dd9SPhilip Rakity (card->ext_csd.raw_erased_mem_count == 50008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && 501f39b2dd9SPhilip Rakity (card->ext_csd.rev == 50208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_REV]) && 503f39b2dd9SPhilip Rakity (card->ext_csd.raw_ext_csd_structure == 50408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_STRUCTURE]) && 505f39b2dd9SPhilip Rakity (card->ext_csd.raw_card_type == 50608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_CARD_TYPE]) && 507f39b2dd9SPhilip Rakity (card->ext_csd.raw_s_a_timeout == 50808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && 509f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_gap_size == 51008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && 511f39b2dd9SPhilip Rakity (card->ext_csd.raw_erase_timeout_mult == 51208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && 513f39b2dd9SPhilip Rakity (card->ext_csd.raw_hc_erase_grp_size == 51408ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && 515f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_trim_mult == 51608ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && 517f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_erase_mult == 51808ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && 519f39b2dd9SPhilip Rakity (card->ext_csd.raw_sec_feature_support == 52008ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && 521f39b2dd9SPhilip Rakity (card->ext_csd.raw_trim_mult == 52208ee80ccSPhilip Rakity bw_ext_csd[EXT_CSD_TRIM_MULT]) && 523f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[0] == 524f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && 525f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[1] == 526f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && 527f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[2] == 528f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && 529f39b2dd9SPhilip Rakity (card->ext_csd.raw_sectors[3] == 530f39b2dd9SPhilip Rakity bw_ext_csd[EXT_CSD_SEC_CNT + 3])); 53108ee80ccSPhilip Rakity if (err) 53208ee80ccSPhilip Rakity err = -EINVAL; 53308ee80ccSPhilip Rakity 53408ee80ccSPhilip Rakity out: 53508ee80ccSPhilip Rakity mmc_free_ext_csd(bw_ext_csd); 5367ea239d9SPierre Ossman return err; 5377ea239d9SPierre Ossman } 5387ea239d9SPierre Ossman 53951ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 54051ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 54151ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 54251ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 54351ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 544dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 545dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 54651ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 54751ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 54851ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 54951ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 55051ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 55151ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 552709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", 553709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset); 554709de99dSChuanxiao Dong MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 55551ec92e2SPierre Ossman 55651ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 55751ec92e2SPierre Ossman &dev_attr_cid.attr, 55851ec92e2SPierre Ossman &dev_attr_csd.attr, 55951ec92e2SPierre Ossman &dev_attr_date.attr, 560dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 561dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 56251ec92e2SPierre Ossman &dev_attr_fwrev.attr, 56351ec92e2SPierre Ossman &dev_attr_hwrev.attr, 56451ec92e2SPierre Ossman &dev_attr_manfid.attr, 56551ec92e2SPierre Ossman &dev_attr_name.attr, 56651ec92e2SPierre Ossman &dev_attr_oemid.attr, 56751ec92e2SPierre Ossman &dev_attr_serial.attr, 568709de99dSChuanxiao Dong &dev_attr_enhanced_area_offset.attr, 569709de99dSChuanxiao Dong &dev_attr_enhanced_area_size.attr, 57051ec92e2SPierre Ossman NULL, 57151ec92e2SPierre Ossman }; 57251ec92e2SPierre Ossman 57351ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 57451ec92e2SPierre Ossman .attrs = mmc_std_attrs, 57551ec92e2SPierre Ossman }; 57651ec92e2SPierre Ossman 577a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 57851ec92e2SPierre Ossman &mmc_std_attr_group, 57951ec92e2SPierre Ossman NULL, 58051ec92e2SPierre Ossman }; 58151ec92e2SPierre Ossman 58251ec92e2SPierre Ossman static struct device_type mmc_type = { 58351ec92e2SPierre Ossman .groups = mmc_attr_groups, 58451ec92e2SPierre Ossman }; 58551ec92e2SPierre Ossman 5867ea239d9SPierre Ossman /* 587b87d8dbfSGirish K S * Select the PowerClass for the current bus width 588b87d8dbfSGirish K S * If power class is defined for 4/8 bit bus in the 589b87d8dbfSGirish K S * extended CSD register, select it by executing the 590b87d8dbfSGirish K S * mmc_switch command. 591b87d8dbfSGirish K S */ 592b87d8dbfSGirish K S static int mmc_select_powerclass(struct mmc_card *card, 593b87d8dbfSGirish K S unsigned int bus_width, u8 *ext_csd) 594b87d8dbfSGirish K S { 595b87d8dbfSGirish K S int err = 0; 596b87d8dbfSGirish K S unsigned int pwrclass_val; 597b87d8dbfSGirish K S unsigned int index = 0; 598b87d8dbfSGirish K S struct mmc_host *host; 599b87d8dbfSGirish K S 600b87d8dbfSGirish K S BUG_ON(!card); 601b87d8dbfSGirish K S 602b87d8dbfSGirish K S host = card->host; 603b87d8dbfSGirish K S BUG_ON(!host); 604b87d8dbfSGirish K S 605b87d8dbfSGirish K S if (ext_csd == NULL) 606b87d8dbfSGirish K S return 0; 607b87d8dbfSGirish K S 608b87d8dbfSGirish K S /* Power class selection is supported for versions >= 4.0 */ 609b87d8dbfSGirish K S if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 610b87d8dbfSGirish K S return 0; 611b87d8dbfSGirish K S 612b87d8dbfSGirish K S /* Power class values are defined only for 4/8 bit bus */ 613b87d8dbfSGirish K S if (bus_width == EXT_CSD_BUS_WIDTH_1) 614b87d8dbfSGirish K S return 0; 615b87d8dbfSGirish K S 616b87d8dbfSGirish K S switch (1 << host->ios.vdd) { 617b87d8dbfSGirish K S case MMC_VDD_165_195: 618b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 619b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_195; 620b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 621b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 622b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_195 : 623b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_195; 624b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 625b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_195; 626b87d8dbfSGirish K S break; 627b87d8dbfSGirish K S case MMC_VDD_32_33: 628b87d8dbfSGirish K S case MMC_VDD_33_34: 629b87d8dbfSGirish K S case MMC_VDD_34_35: 630b87d8dbfSGirish K S case MMC_VDD_35_36: 631b87d8dbfSGirish K S if (host->ios.clock <= 26000000) 632b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_26_360; 633b87d8dbfSGirish K S else if (host->ios.clock <= 52000000) 634b87d8dbfSGirish K S index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? 635b87d8dbfSGirish K S EXT_CSD_PWR_CL_52_360 : 636b87d8dbfSGirish K S EXT_CSD_PWR_CL_DDR_52_360; 637b87d8dbfSGirish K S else if (host->ios.clock <= 200000000) 638b87d8dbfSGirish K S index = EXT_CSD_PWR_CL_200_360; 639b87d8dbfSGirish K S break; 640b87d8dbfSGirish K S default: 641b87d8dbfSGirish K S pr_warning("%s: Voltage range not supported " 642b87d8dbfSGirish K S "for power class.\n", mmc_hostname(host)); 643b87d8dbfSGirish K S return -EINVAL; 644b87d8dbfSGirish K S } 645b87d8dbfSGirish K S 646b87d8dbfSGirish K S pwrclass_val = ext_csd[index]; 647b87d8dbfSGirish K S 648b87d8dbfSGirish K S if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) 649b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> 650b87d8dbfSGirish K S EXT_CSD_PWR_CL_8BIT_SHIFT; 651b87d8dbfSGirish K S else 652b87d8dbfSGirish K S pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> 653b87d8dbfSGirish K S EXT_CSD_PWR_CL_4BIT_SHIFT; 654b87d8dbfSGirish K S 655b87d8dbfSGirish K S /* If the power class is different from the default value */ 656b87d8dbfSGirish K S if (pwrclass_val > 0) { 657b87d8dbfSGirish K S err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 658b87d8dbfSGirish K S EXT_CSD_POWER_CLASS, 659b87d8dbfSGirish K S pwrclass_val, 660b87d8dbfSGirish K S 0); 661b87d8dbfSGirish K S } 662b87d8dbfSGirish K S 663b87d8dbfSGirish K S return err; 664b87d8dbfSGirish K S } 665b87d8dbfSGirish K S 666b87d8dbfSGirish K S /* 6676abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 6686abaa0c9SPierre Ossman * 6698769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 6706abaa0c9SPierre Ossman * we're trying to reinitialise. 6717ea239d9SPierre Ossman */ 6728c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 6736abaa0c9SPierre Ossman struct mmc_card *oldcard) 6747ea239d9SPierre Ossman { 6757ea239d9SPierre Ossman struct mmc_card *card; 67625d5c699SPhilip Rakity int err, ddr = 0; 6777ea239d9SPierre Ossman u32 cid[4]; 6787ea239d9SPierre Ossman unsigned int max_dtr; 679b676f039SPhilip Rakity u32 rocr; 68008ee80ccSPhilip Rakity u8 *ext_csd = NULL; 6817ea239d9SPierre Ossman 6827ea239d9SPierre Ossman BUG_ON(!host); 683d84075c8SPierre Ossman WARN_ON(!host->claimed); 6847ea239d9SPierre Ossman 68544669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting init */ 68644669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 68744669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 68844669034SStefan Nilsson XK 6897ea239d9SPierre Ossman /* 6907ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 6917ea239d9SPierre Ossman * need to tell some cards to go back to the idle 6927ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 6937ea239d9SPierre Ossman * respond. 694c3805467SBalaji T K * mmc_go_idle is needed for eMMC that are asleep 6957ea239d9SPierre Ossman */ 6967ea239d9SPierre Ossman mmc_go_idle(host); 6977ea239d9SPierre Ossman 6987ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 699b676f039SPhilip Rakity err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); 70017b0429dSPierre Ossman if (err) 7016abaa0c9SPierre Ossman goto err; 7027ea239d9SPierre Ossman 7037ea239d9SPierre Ossman /* 704af517150SDavid Brownell * For SPI, enable CRC as appropriate. 705af517150SDavid Brownell */ 706af517150SDavid Brownell if (mmc_host_is_spi(host)) { 707af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 708af517150SDavid Brownell if (err) 709af517150SDavid Brownell goto err; 710af517150SDavid Brownell } 711af517150SDavid Brownell 712af517150SDavid Brownell /* 7137ea239d9SPierre Ossman * Fetch CID from card. 7147ea239d9SPierre Ossman */ 715af517150SDavid Brownell if (mmc_host_is_spi(host)) 716af517150SDavid Brownell err = mmc_send_cid(host, cid); 717af517150SDavid Brownell else 7187ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 71917b0429dSPierre Ossman if (err) 7207ea239d9SPierre Ossman goto err; 7217ea239d9SPierre Ossman 7226abaa0c9SPierre Ossman if (oldcard) { 723adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 724adf66a0dSPierre Ossman err = -ENOENT; 7256abaa0c9SPierre Ossman goto err; 726adf66a0dSPierre Ossman } 7276abaa0c9SPierre Ossman 7286abaa0c9SPierre Ossman card = oldcard; 7296abaa0c9SPierre Ossman } else { 7307ea239d9SPierre Ossman /* 7317ea239d9SPierre Ossman * Allocate card structure. 7327ea239d9SPierre Ossman */ 73351ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 734adf66a0dSPierre Ossman if (IS_ERR(card)) { 735adf66a0dSPierre Ossman err = PTR_ERR(card); 7367ea239d9SPierre Ossman goto err; 737adf66a0dSPierre Ossman } 7387ea239d9SPierre Ossman 7397ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 7407ea239d9SPierre Ossman card->rca = 1; 7417ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 7426abaa0c9SPierre Ossman } 7437ea239d9SPierre Ossman 7447ea239d9SPierre Ossman /* 745af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 7467ea239d9SPierre Ossman */ 747af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 7487ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 74917b0429dSPierre Ossman if (err) 7507ea239d9SPierre Ossman goto free_card; 7517ea239d9SPierre Ossman 7527ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 753af517150SDavid Brownell } 7547ea239d9SPierre Ossman 7556abaa0c9SPierre Ossman if (!oldcard) { 7567ea239d9SPierre Ossman /* 7577ea239d9SPierre Ossman * Fetch CSD from card. 7587ea239d9SPierre Ossman */ 7597ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 76017b0429dSPierre Ossman if (err) 7617ea239d9SPierre Ossman goto free_card; 7627ea239d9SPierre Ossman 763bd766312SPierre Ossman err = mmc_decode_csd(card); 764adf66a0dSPierre Ossman if (err) 765bd766312SPierre Ossman goto free_card; 766bd766312SPierre Ossman err = mmc_decode_cid(card); 767adf66a0dSPierre Ossman if (err) 768bd766312SPierre Ossman goto free_card; 7696abaa0c9SPierre Ossman } 7707ea239d9SPierre Ossman 7717ea239d9SPierre Ossman /* 77289a73cf5SPierre Ossman * Select card, as all following commands rely on that. 7737ea239d9SPierre Ossman */ 774af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 7757ea239d9SPierre Ossman err = mmc_select_card(card); 77617b0429dSPierre Ossman if (err) 7777ea239d9SPierre Ossman goto free_card; 778af517150SDavid Brownell } 7797ea239d9SPierre Ossman 7806abaa0c9SPierre Ossman if (!oldcard) { 78189a73cf5SPierre Ossman /* 782af517150SDavid Brownell * Fetch and process extended CSD. 78389a73cf5SPierre Ossman */ 78408ee80ccSPhilip Rakity 78508ee80ccSPhilip Rakity err = mmc_get_ext_csd(card, &ext_csd); 78608ee80ccSPhilip Rakity if (err) 78708ee80ccSPhilip Rakity goto free_card; 78808ee80ccSPhilip Rakity err = mmc_read_ext_csd(card, ext_csd); 78917b0429dSPierre Ossman if (err) 7907ea239d9SPierre Ossman goto free_card; 791b676f039SPhilip Rakity 792b676f039SPhilip Rakity /* If doing byte addressing, check if required to do sector 793b676f039SPhilip Rakity * addressing. Handle the case of <2GB cards needing sector 794b676f039SPhilip Rakity * addressing. See section 8.1 JEDEC Standard JED84-A441; 795b676f039SPhilip Rakity * ocr register has bit 30 set for sector addressing. 796b676f039SPhilip Rakity */ 797b676f039SPhilip Rakity if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) 798b676f039SPhilip Rakity mmc_card_set_blockaddr(card); 799b676f039SPhilip Rakity 800dfe86cbaSAdrian Hunter /* Erase size depends on CSD and Extended CSD */ 801dfe86cbaSAdrian Hunter mmc_set_erase_size(card); 8026abaa0c9SPierre Ossman } 8037ea239d9SPierre Ossman 8047ea239d9SPierre Ossman /* 805709de99dSChuanxiao Dong * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF 806709de99dSChuanxiao Dong * bit. This bit will be lost every time after a reset or power off. 807709de99dSChuanxiao Dong */ 808709de99dSChuanxiao Dong if (card->ext_csd.enhanced_area_en) { 809709de99dSChuanxiao Dong err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 810b23cf0bdSSeungwon Jeon EXT_CSD_ERASE_GROUP_DEF, 1, 811b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 812709de99dSChuanxiao Dong 813709de99dSChuanxiao Dong if (err && err != -EBADMSG) 814709de99dSChuanxiao Dong goto free_card; 815709de99dSChuanxiao Dong 816709de99dSChuanxiao Dong if (err) { 817709de99dSChuanxiao Dong err = 0; 818709de99dSChuanxiao Dong /* 819709de99dSChuanxiao Dong * Just disable enhanced area off & sz 820709de99dSChuanxiao Dong * will try to enable ERASE_GROUP_DEF 821709de99dSChuanxiao Dong * during next time reinit 822709de99dSChuanxiao Dong */ 823709de99dSChuanxiao Dong card->ext_csd.enhanced_area_offset = -EINVAL; 824709de99dSChuanxiao Dong card->ext_csd.enhanced_area_size = -EINVAL; 825709de99dSChuanxiao Dong } else { 826709de99dSChuanxiao Dong card->ext_csd.erase_group_def = 1; 827709de99dSChuanxiao Dong /* 828709de99dSChuanxiao Dong * enable ERASE_GRP_DEF successfully. 829709de99dSChuanxiao Dong * This will affect the erase size, so 830709de99dSChuanxiao Dong * here need to reset erase size 831709de99dSChuanxiao Dong */ 832709de99dSChuanxiao Dong mmc_set_erase_size(card); 833709de99dSChuanxiao Dong } 834709de99dSChuanxiao Dong } 835709de99dSChuanxiao Dong 836709de99dSChuanxiao Dong /* 83741e2a489SPhilip Rakity * Ensure eMMC user default partition is enabled 83841e2a489SPhilip Rakity */ 839371a689fSAndrei Warkentin if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { 840371a689fSAndrei Warkentin card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; 841371a689fSAndrei Warkentin err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, 842371a689fSAndrei Warkentin card->ext_csd.part_config, 843371a689fSAndrei Warkentin card->ext_csd.part_time); 844371a689fSAndrei Warkentin if (err && err != -EBADMSG) 845371a689fSAndrei Warkentin goto free_card; 84641e2a489SPhilip Rakity } 84741e2a489SPhilip Rakity 84841e2a489SPhilip Rakity /* 84989a73cf5SPierre Ossman * Activate high speed (if supported) 85089a73cf5SPierre Ossman */ 85189a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 85289a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 85389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 854b23cf0bdSSeungwon Jeon EXT_CSD_HS_TIMING, 1, 855b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 856ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 85789a73cf5SPierre Ossman goto free_card; 85889a73cf5SPierre Ossman 859ef0b27d4SAdrian Hunter if (err) { 860a3c76eb9SGirish K S pr_warning("%s: switch to highspeed failed\n", 861ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 862ef0b27d4SAdrian Hunter err = 0; 863ef0b27d4SAdrian Hunter } else { 86489a73cf5SPierre Ossman mmc_card_set_highspeed(card); 86589a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 86689a73cf5SPierre Ossman } 867ef0b27d4SAdrian Hunter } 86889a73cf5SPierre Ossman 86989a73cf5SPierre Ossman /* 8707ea239d9SPierre Ossman * Compute bus speed. 8717ea239d9SPierre Ossman */ 8727ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 8737ea239d9SPierre Ossman 8747ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 8757ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 8767ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 8777ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8787ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 8797ea239d9SPierre Ossman } 8807ea239d9SPierre Ossman 8817ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 8827ea239d9SPierre Ossman 88389a73cf5SPierre Ossman /* 8840f8d8ea6SAdrian Hunter * Indicate DDR mode (if supported). 885dfc13e84SHanumath Prasad */ 886dfc13e84SHanumath Prasad if (mmc_card_highspeed(card)) { 887dfc13e84SHanumath Prasad if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) 8884c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_8V_DDR | 8894c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 8904c4cb171SPhilip Rakity == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50))) 89149e3b5a4SAdrian Hunter ddr = MMC_1_8V_DDR_MODE; 892dfc13e84SHanumath Prasad else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) 8934c4cb171SPhilip Rakity && ((host->caps & (MMC_CAP_1_2V_DDR | 8944c4cb171SPhilip Rakity MMC_CAP_UHS_DDR50)) 8954c4cb171SPhilip Rakity == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50))) 89649e3b5a4SAdrian Hunter ddr = MMC_1_2V_DDR_MODE; 897dfc13e84SHanumath Prasad } 898dfc13e84SHanumath Prasad 899dfc13e84SHanumath Prasad /* 9000f8d8ea6SAdrian Hunter * Activate wide bus and DDR (if supported). 90189a73cf5SPierre Ossman */ 90289a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 903b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 90422113efdSAries Lee static unsigned ext_csd_bits[][2] = { 90522113efdSAries Lee { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, 90622113efdSAries Lee { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, 90722113efdSAries Lee { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, 90822113efdSAries Lee }; 90922113efdSAries Lee static unsigned bus_widths[] = { 91022113efdSAries Lee MMC_BUS_WIDTH_8, 91122113efdSAries Lee MMC_BUS_WIDTH_4, 91222113efdSAries Lee MMC_BUS_WIDTH_1 91322113efdSAries Lee }; 91422113efdSAries Lee unsigned idx, bus_width = 0; 915b30f8af3SJarkko Lavinen 91622113efdSAries Lee if (host->caps & MMC_CAP_8_BIT_DATA) 91722113efdSAries Lee idx = 0; 918dfc13e84SHanumath Prasad else 91922113efdSAries Lee idx = 1; 92022113efdSAries Lee for (; idx < ARRAY_SIZE(bus_widths); idx++) { 92122113efdSAries Lee bus_width = bus_widths[idx]; 92222113efdSAries Lee if (bus_width == MMC_BUS_WIDTH_1) 92322113efdSAries Lee ddr = 0; /* no DDR for 1-bit width */ 924b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][0], 925b87d8dbfSGirish K S ext_csd); 926b87d8dbfSGirish K S if (err) 927b87d8dbfSGirish K S pr_err("%s: power class selection to " 928b87d8dbfSGirish K S "bus width %d failed\n", 929b87d8dbfSGirish K S mmc_hostname(card->host), 930b87d8dbfSGirish K S 1 << bus_width); 931b87d8dbfSGirish K S 93222113efdSAries Lee err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 93322113efdSAries Lee EXT_CSD_BUS_WIDTH, 934d3a8d95dSAndrei Warkentin ext_csd_bits[idx][0], 935b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 93622113efdSAries Lee if (!err) { 9374c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 93808ee80ccSPhilip Rakity 93922113efdSAries Lee /* 94022113efdSAries Lee * If controller can't handle bus width test, 94108ee80ccSPhilip Rakity * compare ext_csd previously read in 1 bit mode 94208ee80ccSPhilip Rakity * against ext_csd at new bus width 94322113efdSAries Lee */ 94422113efdSAries Lee if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) 94508ee80ccSPhilip Rakity err = mmc_compare_ext_csds(card, 94608ee80ccSPhilip Rakity bus_width); 94708ee80ccSPhilip Rakity else 94822113efdSAries Lee err = mmc_bus_test(card, bus_width); 94922113efdSAries Lee if (!err) 95022113efdSAries Lee break; 95122113efdSAries Lee } 952b30f8af3SJarkko Lavinen } 953b30f8af3SJarkko Lavinen 95422113efdSAries Lee if (!err && ddr) { 955b87d8dbfSGirish K S err = mmc_select_powerclass(card, ext_csd_bits[idx][1], 956b87d8dbfSGirish K S ext_csd); 957b87d8dbfSGirish K S if (err) 958b87d8dbfSGirish K S pr_err("%s: power class selection to " 959b87d8dbfSGirish K S "bus width %d ddr %d failed\n", 960b87d8dbfSGirish K S mmc_hostname(card->host), 961b87d8dbfSGirish K S 1 << bus_width, ddr); 962b87d8dbfSGirish K S 96389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 96422113efdSAries Lee EXT_CSD_BUS_WIDTH, 965d3a8d95dSAndrei Warkentin ext_csd_bits[idx][1], 966b23cf0bdSSeungwon Jeon card->ext_csd.generic_cmd6_time); 96722113efdSAries Lee } 968ef0b27d4SAdrian Hunter if (err) { 969a3c76eb9SGirish K S pr_warning("%s: switch to bus width %d ddr %d " 970ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 9710f8d8ea6SAdrian Hunter 1 << bus_width, ddr); 97222113efdSAries Lee goto free_card; 97322113efdSAries Lee } else if (ddr) { 9744c4cb171SPhilip Rakity /* 9754c4cb171SPhilip Rakity * eMMC cards can support 3.3V to 1.2V i/o (vccq) 9764c4cb171SPhilip Rakity * signaling. 9774c4cb171SPhilip Rakity * 9784c4cb171SPhilip Rakity * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. 9794c4cb171SPhilip Rakity * 9804c4cb171SPhilip Rakity * 1.8V vccq at 3.3V core voltage (vcc) is not required 9814c4cb171SPhilip Rakity * in the JEDEC spec for DDR. 9824c4cb171SPhilip Rakity * 9834c4cb171SPhilip Rakity * Do not force change in vccq since we are obviously 9844c4cb171SPhilip Rakity * working and no change to vccq is needed. 9854c4cb171SPhilip Rakity * 9864c4cb171SPhilip Rakity * WARNING: eMMC rules are NOT the same as SD DDR 9874c4cb171SPhilip Rakity */ 9884c4cb171SPhilip Rakity if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) { 9894c4cb171SPhilip Rakity err = mmc_set_signal_voltage(host, 9904c4cb171SPhilip Rakity MMC_SIGNAL_VOLTAGE_120, 0); 9914c4cb171SPhilip Rakity if (err) 9924c4cb171SPhilip Rakity goto err; 9934c4cb171SPhilip Rakity } 9940f8d8ea6SAdrian Hunter mmc_card_set_ddr_mode(card); 9954c4cb171SPhilip Rakity mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50); 9964c4cb171SPhilip Rakity mmc_set_bus_width(card->host, bus_width); 99789a73cf5SPierre Ossman } 998ef0b27d4SAdrian Hunter } 99989a73cf5SPierre Ossman 10006abaa0c9SPierre Ossman if (!oldcard) 10017ea239d9SPierre Ossman host->card = card; 10027ea239d9SPierre Ossman 100308ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 100417b0429dSPierre Ossman return 0; 10056abaa0c9SPierre Ossman 10066abaa0c9SPierre Ossman free_card: 10076abaa0c9SPierre Ossman if (!oldcard) 10086abaa0c9SPierre Ossman mmc_remove_card(card); 10096abaa0c9SPierre Ossman err: 101008ee80ccSPhilip Rakity mmc_free_ext_csd(ext_csd); 10116abaa0c9SPierre Ossman 1012adf66a0dSPierre Ossman return err; 10136abaa0c9SPierre Ossman } 10146abaa0c9SPierre Ossman 10156abaa0c9SPierre Ossman /* 10166abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 10176abaa0c9SPierre Ossman */ 10186abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 10196abaa0c9SPierre Ossman { 10206abaa0c9SPierre Ossman BUG_ON(!host); 10216abaa0c9SPierre Ossman BUG_ON(!host->card); 10226abaa0c9SPierre Ossman 10236abaa0c9SPierre Ossman mmc_remove_card(host->card); 10246abaa0c9SPierre Ossman host->card = NULL; 10256abaa0c9SPierre Ossman } 10266abaa0c9SPierre Ossman 10276abaa0c9SPierre Ossman /* 10286abaa0c9SPierre Ossman * Card detection callback from host. 10296abaa0c9SPierre Ossman */ 10306abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 10316abaa0c9SPierre Ossman { 10326abaa0c9SPierre Ossman int err; 10336abaa0c9SPierre Ossman 10346abaa0c9SPierre Ossman BUG_ON(!host); 10356abaa0c9SPierre Ossman BUG_ON(!host->card); 10366abaa0c9SPierre Ossman 10376abaa0c9SPierre Ossman mmc_claim_host(host); 10386abaa0c9SPierre Ossman 10396abaa0c9SPierre Ossman /* 10406abaa0c9SPierre Ossman * Just check if our card has been removed. 10416abaa0c9SPierre Ossman */ 10426abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 10436abaa0c9SPierre Ossman 10447ea239d9SPierre Ossman mmc_release_host(host); 10457ea239d9SPierre Ossman 104617b0429dSPierre Ossman if (err) { 10474101c16aSPierre Ossman mmc_remove(host); 10486abaa0c9SPierre Ossman 10496abaa0c9SPierre Ossman mmc_claim_host(host); 10506abaa0c9SPierre Ossman mmc_detach_bus(host); 10517f7e4129SUlf Hansson mmc_power_off(host); 10526abaa0c9SPierre Ossman mmc_release_host(host); 10536abaa0c9SPierre Ossman } 10546abaa0c9SPierre Ossman } 10556abaa0c9SPierre Ossman 10566abaa0c9SPierre Ossman /* 10576abaa0c9SPierre Ossman * Suspend callback from host. 10586abaa0c9SPierre Ossman */ 105995cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 10606abaa0c9SPierre Ossman { 1061c3805467SBalaji T K int err = 0; 1062c3805467SBalaji T K 10636abaa0c9SPierre Ossman BUG_ON(!host); 10646abaa0c9SPierre Ossman BUG_ON(!host->card); 10656abaa0c9SPierre Ossman 10666abaa0c9SPierre Ossman mmc_claim_host(host); 1067c3805467SBalaji T K if (mmc_card_can_sleep(host)) 1068c3805467SBalaji T K err = mmc_card_sleep(host); 1069c3805467SBalaji T K else if (!mmc_host_is_spi(host)) 10706abaa0c9SPierre Ossman mmc_deselect_cards(host); 10716abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 10726abaa0c9SPierre Ossman mmc_release_host(host); 107395cdfb72SNicolas Pitre 1074c3805467SBalaji T K return err; 10756abaa0c9SPierre Ossman } 10766abaa0c9SPierre Ossman 10776abaa0c9SPierre Ossman /* 10786abaa0c9SPierre Ossman * Resume callback from host. 10796abaa0c9SPierre Ossman * 10806abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 10816abaa0c9SPierre Ossman * and, if so, restore all state to it. 10826abaa0c9SPierre Ossman */ 108395cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 10846abaa0c9SPierre Ossman { 10856abaa0c9SPierre Ossman int err; 10866abaa0c9SPierre Ossman 10876abaa0c9SPierre Ossman BUG_ON(!host); 10886abaa0c9SPierre Ossman BUG_ON(!host->card); 10896abaa0c9SPierre Ossman 10906abaa0c9SPierre Ossman mmc_claim_host(host); 10918c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 10922986d0bfSPierre Ossman mmc_release_host(host); 10932986d0bfSPierre Ossman 109495cdfb72SNicolas Pitre return err; 10956abaa0c9SPierre Ossman } 10966abaa0c9SPierre Ossman 109712ae637fSOhad Ben-Cohen static int mmc_power_restore(struct mmc_host *host) 1098eae1aeeeSAdrian Hunter { 109912ae637fSOhad Ben-Cohen int ret; 110012ae637fSOhad Ben-Cohen 1101eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 1102eae1aeeeSAdrian Hunter mmc_claim_host(host); 110312ae637fSOhad Ben-Cohen ret = mmc_init_card(host, host->ocr, host->card); 1104eae1aeeeSAdrian Hunter mmc_release_host(host); 110512ae637fSOhad Ben-Cohen 110612ae637fSOhad Ben-Cohen return ret; 1107eae1aeeeSAdrian Hunter } 1108eae1aeeeSAdrian Hunter 1109b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 1110b1ebe384SJarkko Lavinen { 1111b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1112b1ebe384SJarkko Lavinen int err = -ENOSYS; 1113b1ebe384SJarkko Lavinen 1114b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1115b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 1116b1ebe384SJarkko Lavinen if (err < 0) 1117b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 1118b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1119b1ebe384SJarkko Lavinen } 1120b1ebe384SJarkko Lavinen 1121b1ebe384SJarkko Lavinen return err; 1122b1ebe384SJarkko Lavinen } 1123b1ebe384SJarkko Lavinen 1124b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 1125b1ebe384SJarkko Lavinen { 1126b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 1127b1ebe384SJarkko Lavinen int err = -ENOSYS; 1128b1ebe384SJarkko Lavinen 1129b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 1130b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 1131b1ebe384SJarkko Lavinen if (err < 0) 1132b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 1133b1ebe384SJarkko Lavinen mmc_hostname(host), err); 1134b1ebe384SJarkko Lavinen } 1135b1ebe384SJarkko Lavinen 1136b1ebe384SJarkko Lavinen return err; 1137b1ebe384SJarkko Lavinen } 1138b1ebe384SJarkko Lavinen 11399feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 1140b1ebe384SJarkko Lavinen .awake = mmc_awake, 1141b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 11429feae246SAdrian Hunter .remove = mmc_remove, 11439feae246SAdrian Hunter .detect = mmc_detect, 11449feae246SAdrian Hunter .suspend = NULL, 11459feae246SAdrian Hunter .resume = NULL, 1146eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 11479feae246SAdrian Hunter }; 11489feae246SAdrian Hunter 11499feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 1150b1ebe384SJarkko Lavinen .awake = mmc_awake, 1151b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 11529feae246SAdrian Hunter .remove = mmc_remove, 11539feae246SAdrian Hunter .detect = mmc_detect, 11549feae246SAdrian Hunter .suspend = mmc_suspend, 11559feae246SAdrian Hunter .resume = mmc_resume, 1156eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 11579feae246SAdrian Hunter }; 11589feae246SAdrian Hunter 11599feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 11609feae246SAdrian Hunter { 11619feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 11629feae246SAdrian Hunter 116371d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 11649feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 11659feae246SAdrian Hunter else 11669feae246SAdrian Hunter bus_ops = &mmc_ops; 11679feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 11689feae246SAdrian Hunter } 11699feae246SAdrian Hunter 11706abaa0c9SPierre Ossman /* 11716abaa0c9SPierre Ossman * Starting point for MMC card init. 11726abaa0c9SPierre Ossman */ 1173807e8e40SAndy Ross int mmc_attach_mmc(struct mmc_host *host) 11746abaa0c9SPierre Ossman { 11756abaa0c9SPierre Ossman int err; 1176807e8e40SAndy Ross u32 ocr; 11776abaa0c9SPierre Ossman 11786abaa0c9SPierre Ossman BUG_ON(!host); 1179d84075c8SPierre Ossman WARN_ON(!host->claimed); 11806abaa0c9SPierre Ossman 118144669034SStefan Nilsson XK /* Set correct bus mode for MMC before attempting attach */ 118244669034SStefan Nilsson XK if (!mmc_host_is_spi(host)) 118344669034SStefan Nilsson XK mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); 118444669034SStefan Nilsson XK 1185807e8e40SAndy Ross err = mmc_send_op_cond(host, 0, &ocr); 1186807e8e40SAndy Ross if (err) 1187807e8e40SAndy Ross return err; 1188807e8e40SAndy Ross 11899feae246SAdrian Hunter mmc_attach_bus_ops(host); 11908f230f45STakashi Iwai if (host->ocr_avail_mmc) 11918f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_mmc; 11926abaa0c9SPierre Ossman 11936abaa0c9SPierre Ossman /* 1194af517150SDavid Brownell * We need to get OCR a different way for SPI. 1195af517150SDavid Brownell */ 1196af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1197af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 1198af517150SDavid Brownell if (err) 1199af517150SDavid Brownell goto err; 1200af517150SDavid Brownell } 1201af517150SDavid Brownell 1202af517150SDavid Brownell /* 12036abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 12046abaa0c9SPierre Ossman * support. 12056abaa0c9SPierre Ossman */ 12066abaa0c9SPierre Ossman if (ocr & 0x7F) { 1207a3c76eb9SGirish K S pr_warning("%s: card claims to support voltages " 12086abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 12096abaa0c9SPierre Ossman mmc_hostname(host)); 12106abaa0c9SPierre Ossman ocr &= ~0x7F; 12116abaa0c9SPierre Ossman } 12126abaa0c9SPierre Ossman 12136abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 12146abaa0c9SPierre Ossman 12156abaa0c9SPierre Ossman /* 12166abaa0c9SPierre Ossman * Can we support the voltage of the card? 12176abaa0c9SPierre Ossman */ 1218109b5bedSPierre Ossman if (!host->ocr) { 1219109b5bedSPierre Ossman err = -EINVAL; 12206abaa0c9SPierre Ossman goto err; 1221109b5bedSPierre Ossman } 12226abaa0c9SPierre Ossman 12236abaa0c9SPierre Ossman /* 12246abaa0c9SPierre Ossman * Detect and init the card. 12256abaa0c9SPierre Ossman */ 12268c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 122717b0429dSPierre Ossman if (err) 12286abaa0c9SPierre Ossman goto err; 12296abaa0c9SPierre Ossman 12306abaa0c9SPierre Ossman mmc_release_host(host); 12314101c16aSPierre Ossman err = mmc_add_card(host->card); 1232807e8e40SAndy Ross mmc_claim_host(host); 12337ea239d9SPierre Ossman if (err) 12342986d0bfSPierre Ossman goto remove_card; 12357ea239d9SPierre Ossman 12367ea239d9SPierre Ossman return 0; 12377ea239d9SPierre Ossman 12382986d0bfSPierre Ossman remove_card: 1239807e8e40SAndy Ross mmc_release_host(host); 12406abaa0c9SPierre Ossman mmc_remove_card(host->card); 12412986d0bfSPierre Ossman mmc_claim_host(host); 1242807e8e40SAndy Ross host->card = NULL; 12437ea239d9SPierre Ossman err: 12447ea239d9SPierre Ossman mmc_detach_bus(host); 12457ea239d9SPierre Ossman 1246a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising MMC card\n", 1247109b5bedSPierre Ossman mmc_hostname(host), err); 1248109b5bedSPierre Ossman 1249adf66a0dSPierre Ossman return err; 12507ea239d9SPierre Ossman } 1251