17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/sd.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 67ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, 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> 149288cac0SWolfram Sang #include <linux/sizes.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 160205a904SPaul Gortmaker #include <linux/stat.h> 170cb403a2SUlf Hansson #include <linux/pm_runtime.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include <linux/mmc/host.h> 207ea239d9SPierre Ossman #include <linux/mmc/card.h> 217ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 223373c0aeSPierre Ossman #include <linux/mmc/sd.h> 237ea239d9SPierre Ossman 247ea239d9SPierre Ossman #include "core.h" 254facdde1SUlf Hansson #include "card.h" 265857b29bSUlf Hansson #include "host.h" 274101c16aSPierre Ossman #include "bus.h" 287ea239d9SPierre Ossman #include "mmc_ops.h" 29ce101496SMark Brown #include "sd.h" 307ea239d9SPierre Ossman #include "sd_ops.h" 317ea239d9SPierre Ossman 327ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 337ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 347ea239d9SPierre Ossman 0, 0, 0, 0 357ea239d9SPierre Ossman }; 367ea239d9SPierre Ossman 377ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 387ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 397ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 407ea239d9SPierre Ossman }; 417ea239d9SPierre Ossman 424406ae21SShawn Lin static const unsigned int taac_exp[] = { 437ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 447ea239d9SPierre Ossman }; 457ea239d9SPierre Ossman 464406ae21SShawn Lin static const unsigned int taac_mant[] = { 477ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 487ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 497ea239d9SPierre Ossman }; 507ea239d9SPierre Ossman 519288cac0SWolfram Sang static const unsigned int sd_au_size[] = { 529288cac0SWolfram Sang 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, 539288cac0SWolfram Sang SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, 549288cac0SWolfram Sang SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, 559288cac0SWolfram Sang SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, 569288cac0SWolfram Sang }; 579288cac0SWolfram Sang 587ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 597ea239d9SPierre Ossman ({ \ 607ea239d9SPierre Ossman const int __size = size; \ 617ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 627ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 637ea239d9SPierre Ossman const int __shft = (start) & 31; \ 647ea239d9SPierre Ossman u32 __res; \ 657ea239d9SPierre Ossman \ 667ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 677ea239d9SPierre Ossman if (__size + __shft > 32) \ 687ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 697ea239d9SPierre Ossman __res & __mask; \ 707ea239d9SPierre Ossman }) 717ea239d9SPierre Ossman 727ea239d9SPierre Ossman /* 737ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 747ea239d9SPierre Ossman */ 7571578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 767ea239d9SPierre Ossman { 777ea239d9SPierre Ossman u32 *resp = card->raw_cid; 787ea239d9SPierre Ossman 797ea239d9SPierre Ossman /* 807ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 817ea239d9SPierre Ossman * have to assume we can parse this. 827ea239d9SPierre Ossman */ 837ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 847ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 857ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 867ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 877ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 887ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 897ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 907ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 917ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 927ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 937ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 947ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 957ea239d9SPierre Ossman 967ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 977ea239d9SPierre Ossman } 987ea239d9SPierre Ossman 997ea239d9SPierre Ossman /* 1007ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1017ea239d9SPierre Ossman */ 102bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1037ea239d9SPierre Ossman { 1047ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1057ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1067ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1077ea239d9SPierre Ossman 1087ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1097ea239d9SPierre Ossman 1107ea239d9SPierre Ossman switch (csd_struct) { 1117ea239d9SPierre Ossman case 0: 1127ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1137ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1144406ae21SShawn Lin csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; 1154406ae21SShawn Lin csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1167ea239d9SPierre Ossman 1177ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1187ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1197ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1207ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1217ea239d9SPierre Ossman 1227ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1237ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1247ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1257ea239d9SPierre Ossman 1267ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1277ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1287ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1297ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1303d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1317ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1327ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1337ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 134dfe86cbaSAdrian Hunter 135dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 136dfe86cbaSAdrian Hunter csd->erase_size = 1; 137dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) { 138dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 139dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 140dfe86cbaSAdrian Hunter } 1417ea239d9SPierre Ossman break; 1427ea239d9SPierre Ossman case 1: 1437ea239d9SPierre Ossman /* 1443a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most 1457ea239d9SPierre Ossman * interesting fields are unused and have fixed 1467ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1477ea239d9SPierre Ossman * we assume those fixed values ourselves. 1487ea239d9SPierre Ossman */ 1497ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1507ea239d9SPierre Ossman 1514406ae21SShawn Lin csd->taac_ns = 0; /* Unused */ 1524406ae21SShawn Lin csd->taac_clks = 0; /* Unused */ 1537ea239d9SPierre Ossman 1547ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1557ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1567ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1577ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1583a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22); 1593a303511SArindam Nath 1603a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ 1613a303511SArindam Nath if (csd->c_size >= 0xFFFF) 1623a303511SArindam Nath mmc_card_set_ext_capacity(card); 1637ea239d9SPierre Ossman 1647ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1657ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1667ea239d9SPierre Ossman 1677ea239d9SPierre Ossman csd->read_blkbits = 9; 1687ea239d9SPierre Ossman csd->read_partial = 0; 1697ea239d9SPierre Ossman csd->write_misalign = 0; 1707ea239d9SPierre Ossman csd->read_misalign = 0; 1717ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1727ea239d9SPierre Ossman csd->write_blkbits = 9; 1737ea239d9SPierre Ossman csd->write_partial = 0; 174dfe86cbaSAdrian Hunter csd->erase_size = 1; 1757ea239d9SPierre Ossman break; 1767ea239d9SPierre Ossman default: 177a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1787ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 179bd766312SPierre Ossman return -EINVAL; 1807ea239d9SPierre Ossman } 181bd766312SPierre Ossman 182dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size; 183dfe86cbaSAdrian Hunter 184bd766312SPierre Ossman return 0; 1857ea239d9SPierre Ossman } 1867ea239d9SPierre Ossman 1877ea239d9SPierre Ossman /* 1887ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1897ea239d9SPierre Ossman */ 190bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1917ea239d9SPierre Ossman { 1927ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1937ea239d9SPierre Ossman unsigned int scr_struct; 1947ea239d9SPierre Ossman u32 resp[4]; 1957ea239d9SPierre Ossman 1967ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1977ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1987ea239d9SPierre Ossman 1997ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 2007ea239d9SPierre Ossman if (scr_struct != 0) { 201a3c76eb9SGirish K S pr_err("%s: unrecognised SCR structure version %d\n", 2027ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 203bd766312SPierre Ossman return -EINVAL; 2047ea239d9SPierre Ossman } 2057ea239d9SPierre Ossman 2067ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 2077ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 208013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2) 209013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */ 210013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); 211bd766312SPierre Ossman 212dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 213dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 214dfe86cbaSAdrian Hunter else 215dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 216dfe86cbaSAdrian Hunter 217f0d89972SAndrei Warkentin if (scr->sda_spec3) 218f0d89972SAndrei Warkentin scr->cmds = UNSTUFF_BITS(resp, 32, 2); 219bd766312SPierre Ossman return 0; 2207ea239d9SPierre Ossman } 2217ea239d9SPierre Ossman 2227ea239d9SPierre Ossman /* 223dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 224dfe86cbaSAdrian Hunter */ 225dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card) 226dfe86cbaSAdrian Hunter { 227dfe86cbaSAdrian Hunter unsigned int au, es, et, eo; 22806c9ccb7SWinkler, Tomas __be32 *raw_ssr; 2295275a652SUri Yanai int i; 230dfe86cbaSAdrian Hunter 231dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 2326606110dSJoe Perches pr_warn("%s: card lacks mandatory SD Status function\n", 2336606110dSJoe Perches mmc_hostname(card->host)); 234dfe86cbaSAdrian Hunter return 0; 235dfe86cbaSAdrian Hunter } 236dfe86cbaSAdrian Hunter 237e85baa88SPaul Burton raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL); 238e85baa88SPaul Burton if (!raw_ssr) 239e85baa88SPaul Burton return -ENOMEM; 240e85baa88SPaul Burton 241e85baa88SPaul Burton if (mmc_app_sd_status(card, raw_ssr)) { 2426606110dSJoe Perches pr_warn("%s: problem reading SD Status register\n", 2436606110dSJoe Perches mmc_hostname(card->host)); 244e85baa88SPaul Burton kfree(raw_ssr); 2455275a652SUri Yanai return 0; 246dfe86cbaSAdrian Hunter } 247dfe86cbaSAdrian Hunter 248dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 249e85baa88SPaul Burton card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]); 250e85baa88SPaul Burton 251e85baa88SPaul Burton kfree(raw_ssr); 252dfe86cbaSAdrian Hunter 253dfe86cbaSAdrian Hunter /* 254dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 255dfe86cbaSAdrian Hunter * bitfield positions accordingly. 256dfe86cbaSAdrian Hunter */ 2575275a652SUri Yanai au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4); 2589288cac0SWolfram Sang if (au) { 2599288cac0SWolfram Sang if (au <= 9 || card->scr.sda_spec3) { 2609288cac0SWolfram Sang card->ssr.au = sd_au_size[au]; 2615275a652SUri Yanai es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16); 2625275a652SUri Yanai et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6); 263dfe86cbaSAdrian Hunter if (es && et) { 2645275a652SUri Yanai eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2); 265dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 266dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 267dfe86cbaSAdrian Hunter } 268dfe86cbaSAdrian Hunter } else { 2696606110dSJoe Perches pr_warn("%s: SD Status: Invalid Allocation Unit size\n", 2709288cac0SWolfram Sang mmc_hostname(card->host)); 2719288cac0SWolfram Sang } 272dfe86cbaSAdrian Hunter } 2735275a652SUri Yanai 2745275a652SUri Yanai return 0; 275dfe86cbaSAdrian Hunter } 276dfe86cbaSAdrian Hunter 277dfe86cbaSAdrian Hunter /* 2781addfcdbSPierre Ossman * Fetches and decodes switch information 2797ea239d9SPierre Ossman */ 2801addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 2817ea239d9SPierre Ossman { 2827ea239d9SPierre Ossman int err; 2837ea239d9SPierre Ossman u8 *status; 2847ea239d9SPierre Ossman 2853373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 28617b0429dSPierre Ossman return 0; 2873373c0aeSPierre Ossman 2883373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 2896606110dSJoe Perches pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", 2903373c0aeSPierre Ossman mmc_hostname(card->host)); 29117b0429dSPierre Ossman return 0; 2923373c0aeSPierre Ossman } 2933373c0aeSPierre Ossman 2947ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 295e1df7ae3SMarkus Elfring if (!status) 29617b0429dSPierre Ossman return -ENOMEM; 2977ea239d9SPierre Ossman 298a39ca6aeSAaron Lu /* 299a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation. 300a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not 301a39ca6aeSAaron Lu * change with the arguments. 302a39ca6aeSAaron Lu */ 303a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status); 30417b0429dSPierre Ossman if (err) { 305013909c4SArindam Nath /* 306013909c4SArindam Nath * If the host or the card can't do the switch, 307013909c4SArindam Nath * fail more gracefully. 308013909c4SArindam Nath */ 309013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 310adf66a0dSPierre Ossman goto out; 311adf66a0dSPierre Ossman 3126606110dSJoe Perches pr_warn("%s: problem reading Bus Speed modes\n", 3133373c0aeSPierre Ossman mmc_hostname(card->host)); 31417b0429dSPierre Ossman err = 0; 315adf66a0dSPierre Ossman 3167ea239d9SPierre Ossman goto out; 3177ea239d9SPierre Ossman } 3187ea239d9SPierre Ossman 319fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED) 320fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; 321f2815f68SSubhash Jadavani 322013909c4SArindam Nath if (card->scr.sda_spec3) { 323013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 324a39ca6aeSAaron Lu /* Driver Strengths supported by the card */ 325013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 326d9812780SRussell King card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; 327013909c4SArindam Nath } 3287ea239d9SPierre Ossman 3291addfcdbSPierre Ossman out: 3301addfcdbSPierre Ossman kfree(status); 3311addfcdbSPierre Ossman 3321addfcdbSPierre Ossman return err; 3331addfcdbSPierre Ossman } 3341addfcdbSPierre Ossman 3351addfcdbSPierre Ossman /* 3361addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3371addfcdbSPierre Ossman */ 33871578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3391addfcdbSPierre Ossman { 3401addfcdbSPierre Ossman int err; 3411addfcdbSPierre Ossman u8 *status; 3421addfcdbSPierre Ossman 3433373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 34417b0429dSPierre Ossman return 0; 3453373c0aeSPierre Ossman 3463373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 34717b0429dSPierre Ossman return 0; 3483373c0aeSPierre Ossman 3491addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 35017b0429dSPierre Ossman return 0; 3511addfcdbSPierre Ossman 3521addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 35317b0429dSPierre Ossman return 0; 3541addfcdbSPierre Ossman 3551addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 356e1df7ae3SMarkus Elfring if (!status) 35717b0429dSPierre Ossman return -ENOMEM; 3581addfcdbSPierre Ossman 3597ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 36017b0429dSPierre Ossman if (err) 3617ea239d9SPierre Ossman goto out; 3627ea239d9SPierre Ossman 3637ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 3646606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n", 3657ea239d9SPierre Ossman mmc_hostname(card->host)); 36671578a1eSMichal Miroslaw err = 0; 3677ea239d9SPierre Ossman } else { 36871578a1eSMichal Miroslaw err = 1; 3697ea239d9SPierre Ossman } 3707ea239d9SPierre Ossman 3717ea239d9SPierre Ossman out: 3727ea239d9SPierre Ossman kfree(status); 3737ea239d9SPierre Ossman 3747ea239d9SPierre Ossman return err; 3757ea239d9SPierre Ossman } 3767ea239d9SPierre Ossman 377d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 378d6d50a15SArindam Nath { 379fa021cefSAdrian Hunter int card_drv_type, drive_strength, drv_type; 380d6d50a15SArindam Nath int err; 381d6d50a15SArindam Nath 3823853a042SAdrian Hunter card->drive_strength = 0; 3833853a042SAdrian Hunter 384fa021cefSAdrian Hunter card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; 385ca8e99b3SPhilip Rakity 386e23350b3SAdrian Hunter drive_strength = mmc_select_drive_strength(card, 387ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 388e23350b3SAdrian Hunter card_drv_type, &drv_type); 389ca8e99b3SPhilip Rakity 390b4f30a17SAdrian Hunter if (drive_strength) { 391ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 392d6d50a15SArindam Nath if (err) 393d6d50a15SArindam Nath return err; 394ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 3956606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n", 396d6d50a15SArindam Nath mmc_hostname(card->host)); 397d6d50a15SArindam Nath return 0; 398d6d50a15SArindam Nath } 3993853a042SAdrian Hunter card->drive_strength = drive_strength; 400b4f30a17SAdrian Hunter } 401d6d50a15SArindam Nath 402b4f30a17SAdrian Hunter if (drv_type) 403b4f30a17SAdrian Hunter mmc_set_driver_type(card->host, drv_type); 404d6d50a15SArindam Nath 405d6d50a15SArindam Nath return 0; 406d6d50a15SArindam Nath } 407d6d50a15SArindam Nath 40893c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 40949c468fcSArindam Nath { 41049c468fcSArindam Nath /* 41149c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 41249c468fcSArindam Nath * default speed. 41349c468fcSArindam Nath */ 4143f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 41593c712f9SSubhash Jadavani card->sd_bus_speed = 0; 41693c712f9SSubhash Jadavani return; 41793c712f9SSubhash Jadavani } 41849c468fcSArindam Nath 41949c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 42049c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 42193c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 42249c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 42349c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 42493c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 42549c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 42649c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 42749c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 42893c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 42949c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43049c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 43149c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 43293c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 43349c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43449c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 43549c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 43649c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 43793c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 43893c712f9SSubhash Jadavani } 43949c468fcSArindam Nath } 44049c468fcSArindam Nath 44193c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 44293c712f9SSubhash Jadavani { 44393c712f9SSubhash Jadavani int err; 44493c712f9SSubhash Jadavani unsigned int timing = 0; 44593c712f9SSubhash Jadavani 44693c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 44793c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 44893c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 44993c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 45093c712f9SSubhash Jadavani break; 45193c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 45293c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 45393c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 45493c712f9SSubhash Jadavani break; 45593c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 45693c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 45793c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 45893c712f9SSubhash Jadavani break; 45993c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 46093c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 46193c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 46293c712f9SSubhash Jadavani break; 46393c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 46493c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 46593c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 46693c712f9SSubhash Jadavani break; 46793c712f9SSubhash Jadavani default: 46893c712f9SSubhash Jadavani return 0; 46993c712f9SSubhash Jadavani } 47093c712f9SSubhash Jadavani 47193c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 47249c468fcSArindam Nath if (err) 47349c468fcSArindam Nath return err; 47449c468fcSArindam Nath 47593c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 4766606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n", 47749c468fcSArindam Nath mmc_hostname(card->host)); 47849c468fcSArindam Nath else { 47949c468fcSArindam Nath mmc_set_timing(card->host, timing); 48049c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 48149c468fcSArindam Nath } 48249c468fcSArindam Nath 48349c468fcSArindam Nath return 0; 48449c468fcSArindam Nath } 48549c468fcSArindam Nath 48655c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 48755c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 48855c4665eSAaron Lu { 48955c4665eSAaron Lu u32 voltage, max_current; 49055c4665eSAaron Lu 49155c4665eSAaron Lu voltage = 1 << host->ios.vdd; 49255c4665eSAaron Lu switch (voltage) { 49355c4665eSAaron Lu case MMC_VDD_165_195: 49455c4665eSAaron Lu max_current = host->max_current_180; 49555c4665eSAaron Lu break; 49655c4665eSAaron Lu case MMC_VDD_29_30: 49755c4665eSAaron Lu case MMC_VDD_30_31: 49855c4665eSAaron Lu max_current = host->max_current_300; 49955c4665eSAaron Lu break; 50055c4665eSAaron Lu case MMC_VDD_32_33: 50155c4665eSAaron Lu case MMC_VDD_33_34: 50255c4665eSAaron Lu max_current = host->max_current_330; 50355c4665eSAaron Lu break; 50455c4665eSAaron Lu default: 50555c4665eSAaron Lu max_current = 0; 50655c4665eSAaron Lu } 50755c4665eSAaron Lu 50855c4665eSAaron Lu return max_current; 50955c4665eSAaron Lu } 51055c4665eSAaron Lu 5115371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5125371c927SArindam Nath { 5130aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5145371c927SArindam Nath int err; 51555c4665eSAaron Lu u32 max_current; 5165371c927SArindam Nath 5175371c927SArindam Nath /* 5185371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5190aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5200aa67700SPhilip Rakity * current limit. 52155c4665eSAaron Lu */ 52255c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 52355c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 52455c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 52555c4665eSAaron Lu return 0; 52655c4665eSAaron Lu 52755c4665eSAaron Lu /* 52855c4665eSAaron Lu * Host has different current capabilities when operating at 52955c4665eSAaron Lu * different voltages, so find out its max current first. 53055c4665eSAaron Lu */ 53155c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 53255c4665eSAaron Lu 53355c4665eSAaron Lu /* 534a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 535a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 536a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 537a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 538a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 539a39ca6aeSAaron Lu * maximum 300ma from the host. 540d9812780SRussell King * 541d9812780SRussell King * The above is incorrect: if we try to set a current limit that is 542d9812780SRussell King * not supported by the card, the card can rightfully error out the 543d9812780SRussell King * attempt, and remain at the default current limit. This results 544d9812780SRussell King * in a 300mA card being limited to 200mA even though the host 545d9812780SRussell King * supports 800mA. Failures seen with SanDisk 8GB UHS cards with 546d9812780SRussell King * an iMX6 host. --rmk 5475371c927SArindam Nath */ 548d9812780SRussell King if (max_current >= 800 && 549d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) 5505371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 551d9812780SRussell King else if (max_current >= 600 && 552d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) 5535371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 554d9812780SRussell King else if (max_current >= 400 && 555d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) 5565371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 557d9812780SRussell King else if (max_current >= 200 && 558d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) 5595371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5605371c927SArindam Nath 5610aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 5625371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5635371c927SArindam Nath if (err) 5645371c927SArindam Nath return err; 5655371c927SArindam Nath 5665371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 5676606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n", 5685371c927SArindam Nath mmc_hostname(card->host)); 5695371c927SArindam Nath 5700aa67700SPhilip Rakity } 571a39ca6aeSAaron Lu 5725371c927SArindam Nath return 0; 5735371c927SArindam Nath } 5745371c927SArindam Nath 575d6d50a15SArindam Nath /* 576d6d50a15SArindam Nath * UHS-I specific initialization procedure 577d6d50a15SArindam Nath */ 578d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 579d6d50a15SArindam Nath { 580d6d50a15SArindam Nath int err; 581d6d50a15SArindam Nath u8 *status; 582d6d50a15SArindam Nath 583d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 584d6d50a15SArindam Nath return 0; 585d6d50a15SArindam Nath 586d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 587e1df7ae3SMarkus Elfring if (!status) 588d6d50a15SArindam Nath return -ENOMEM; 589d6d50a15SArindam Nath 590d6d50a15SArindam Nath /* Set 4-bit bus width */ 591d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 592d6d50a15SArindam Nath if (err) 593d6d50a15SArindam Nath goto out; 594d6d50a15SArindam Nath 595d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 596d6d50a15SArindam Nath 59793c712f9SSubhash Jadavani /* 59893c712f9SSubhash Jadavani * Select the bus speed mode depending on host 59993c712f9SSubhash Jadavani * and card capability. 60093c712f9SSubhash Jadavani */ 60193c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 60293c712f9SSubhash Jadavani 603d6d50a15SArindam Nath /* Set the driver strength for the card */ 604d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 60549c468fcSArindam Nath if (err) 60649c468fcSArindam Nath goto out; 60749c468fcSArindam Nath 60893c712f9SSubhash Jadavani /* Set current limit for the card */ 60993c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6105371c927SArindam Nath if (err) 6115371c927SArindam Nath goto out; 6125371c927SArindam Nath 61393c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 61493c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 615b513ea25SArindam Nath if (err) 616b513ea25SArindam Nath goto out; 617b513ea25SArindam Nath 618810e08eeSFredrik Soderstedt /* 619810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 620810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 621810e08eeSFredrik Soderstedt */ 62263e415c6SAdrian Hunter if (!mmc_host_is_spi(card->host) && 623e10c3219SCarlo Caione (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || 624e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_DDR50 || 625e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { 62663e415c6SAdrian Hunter err = mmc_execute_tuning(card); 6274324f6deSWeijun Yang 6284324f6deSWeijun Yang /* 6294324f6deSWeijun Yang * As SD Specifications Part1 Physical Layer Specification 6304324f6deSWeijun Yang * Version 3.01 says, CMD19 tuning is available for unlocked 6314324f6deSWeijun Yang * cards in transfer state of 1.8V signaling mode. The small 6324324f6deSWeijun Yang * difference between v3.00 and 3.01 spec means that CMD19 6334324f6deSWeijun Yang * tuning is also available for DDR50 mode. 6344324f6deSWeijun Yang */ 635e10c3219SCarlo Caione if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { 6364324f6deSWeijun Yang pr_warn("%s: ddr50 tuning failed\n", 6374324f6deSWeijun Yang mmc_hostname(card->host)); 6384324f6deSWeijun Yang err = 0; 6394324f6deSWeijun Yang } 6404324f6deSWeijun Yang } 6414324f6deSWeijun Yang 642d6d50a15SArindam Nath out: 643d6d50a15SArindam Nath kfree(status); 644d6d50a15SArindam Nath 645d6d50a15SArindam Nath return err; 646d6d50a15SArindam Nath } 647d6d50a15SArindam Nath 64851ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 64951ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 65051ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 65151ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 65251ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 6535275a652SUri Yanai MMC_DEV_ATTR(ssr, 6545275a652SUri Yanai "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", 6555275a652SUri Yanai card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], 6565275a652SUri Yanai card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], 6575275a652SUri Yanai card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], 6585275a652SUri Yanai card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], 6595275a652SUri Yanai card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], 6605275a652SUri Yanai card->raw_ssr[15]); 66151ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 662dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 663dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 66451ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 66551ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 66651ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 66751ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 66851ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 66951ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 670c892b0d8SBastian Stender MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); 671974e85e9SHarish Jenny K N MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); 67251ec92e2SPierre Ossman 67351ec92e2SPierre Ossman 6746825a606SBojan Prtvar static ssize_t mmc_dsr_show(struct device *dev, 6756825a606SBojan Prtvar struct device_attribute *attr, 6766825a606SBojan Prtvar char *buf) 6776825a606SBojan Prtvar { 6786825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev); 6796825a606SBojan Prtvar struct mmc_host *host = card->host; 6806825a606SBojan Prtvar 6816825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req) 6826825a606SBojan Prtvar return sprintf(buf, "0x%x\n", host->dsr); 6836825a606SBojan Prtvar else 6846825a606SBojan Prtvar /* return default DSR value */ 6856825a606SBojan Prtvar return sprintf(buf, "0x%x\n", 0x404); 6866825a606SBojan Prtvar } 6876825a606SBojan Prtvar 6886825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 6896825a606SBojan Prtvar 69051ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 69151ec92e2SPierre Ossman &dev_attr_cid.attr, 69251ec92e2SPierre Ossman &dev_attr_csd.attr, 69351ec92e2SPierre Ossman &dev_attr_scr.attr, 6945275a652SUri Yanai &dev_attr_ssr.attr, 69551ec92e2SPierre Ossman &dev_attr_date.attr, 696dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 697dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 69851ec92e2SPierre Ossman &dev_attr_fwrev.attr, 69951ec92e2SPierre Ossman &dev_attr_hwrev.attr, 70051ec92e2SPierre Ossman &dev_attr_manfid.attr, 70151ec92e2SPierre Ossman &dev_attr_name.attr, 70251ec92e2SPierre Ossman &dev_attr_oemid.attr, 70351ec92e2SPierre Ossman &dev_attr_serial.attr, 7045fb06af7SBojan Prtvar &dev_attr_ocr.attr, 705974e85e9SHarish Jenny K N &dev_attr_rca.attr, 7066825a606SBojan Prtvar &dev_attr_dsr.attr, 70751ec92e2SPierre Ossman NULL, 70851ec92e2SPierre Ossman }; 709d1e58212SAxel Lin ATTRIBUTE_GROUPS(sd_std); 71051ec92e2SPierre Ossman 71171578a1eSMichal Miroslaw struct device_type sd_type = { 712d1e58212SAxel Lin .groups = sd_std_groups, 71351ec92e2SPierre Ossman }; 71451ec92e2SPierre Ossman 7157ea239d9SPierre Ossman /* 71671578a1eSMichal Miroslaw * Fetch CID from card. 7176abaa0c9SPierre Ossman */ 718d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 7196abaa0c9SPierre Ossman { 7206abaa0c9SPierre Ossman int err; 72155c4665eSAaron Lu u32 max_current; 7220797e5f1SJohan Rudholm int retries = 10; 72369041150SUlf Hansson u32 pocr = ocr; 7240797e5f1SJohan Rudholm 7250797e5f1SJohan Rudholm try_again: 7260797e5f1SJohan Rudholm if (!retries) { 7270797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 7286606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); 7290797e5f1SJohan Rudholm } 7306abaa0c9SPierre Ossman 7316abaa0c9SPierre Ossman /* 7326abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 7336abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 7346abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 7356abaa0c9SPierre Ossman * respond. 7366abaa0c9SPierre Ossman */ 7376abaa0c9SPierre Ossman mmc_go_idle(host); 7386abaa0c9SPierre Ossman 7396abaa0c9SPierre Ossman /* 7406abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 7416abaa0c9SPierre Ossman * compliant card and we should set bit 30 7426abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 7436abaa0c9SPierre Ossman * block-addressed SDHC cards. 7446abaa0c9SPierre Ossman */ 7456abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 74617b0429dSPierre Ossman if (!err) 747f2119df6SArindam Nath ocr |= SD_OCR_CCS; 7486abaa0c9SPierre Ossman 749f2119df6SArindam Nath /* 750f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 7510797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 7520797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 753f2119df6SArindam Nath */ 7540797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 755f2119df6SArindam Nath ocr |= SD_OCR_S18R; 756f2119df6SArindam Nath 75755c4665eSAaron Lu /* 75855c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 75955c4665eSAaron Lu * XPC should be set to 1. 76055c4665eSAaron Lu */ 76155c4665eSAaron Lu max_current = sd_get_host_max_current(host); 76255c4665eSAaron Lu if (max_current > 150) 763f2119df6SArindam Nath ocr |= SD_OCR_XPC; 764f2119df6SArindam Nath 765d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 76617b0429dSPierre Ossman if (err) 76771578a1eSMichal Miroslaw return err; 7686abaa0c9SPierre Ossman 769f2119df6SArindam Nath /* 770f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 771f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 772f2119df6SArindam Nath */ 773d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 774d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 7752ed573b6SUlf Hansson err = mmc_set_uhs_voltage(host, pocr); 7760797e5f1SJohan Rudholm if (err == -EAGAIN) { 7770797e5f1SJohan Rudholm retries--; 7780797e5f1SJohan Rudholm goto try_again; 7790797e5f1SJohan Rudholm } else if (err) { 7800797e5f1SJohan Rudholm retries = 0; 781f2119df6SArindam Nath goto try_again; 782f2119df6SArindam Nath } 783f2119df6SArindam Nath } 784f2119df6SArindam Nath 785af517150SDavid Brownell err = mmc_send_cid(host, cid); 78671578a1eSMichal Miroslaw return err; 787adf66a0dSPierre Ossman } 7886abaa0c9SPierre Ossman 78971578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 79071578a1eSMichal Miroslaw { 79171578a1eSMichal Miroslaw int err; 7926abaa0c9SPierre Ossman 7936abaa0c9SPierre Ossman /* 7946abaa0c9SPierre Ossman * Fetch CSD from card. 7956abaa0c9SPierre Ossman */ 7966abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 79717b0429dSPierre Ossman if (err) 79871578a1eSMichal Miroslaw return err; 7996abaa0c9SPierre Ossman 800bd766312SPierre Ossman err = mmc_decode_csd(card); 801adf66a0dSPierre Ossman if (err) 80271578a1eSMichal Miroslaw return err; 803bd766312SPierre Ossman 80471578a1eSMichal Miroslaw return 0; 8056abaa0c9SPierre Ossman } 8066abaa0c9SPierre Ossman 8079f6e0bffSLars-Peter Clausen static int mmc_sd_get_ro(struct mmc_host *host) 8089f6e0bffSLars-Peter Clausen { 8099f6e0bffSLars-Peter Clausen int ro; 8109f6e0bffSLars-Peter Clausen 8119f6e0bffSLars-Peter Clausen /* 8129f6e0bffSLars-Peter Clausen * Some systems don't feature a write-protect pin and don't need one. 8139f6e0bffSLars-Peter Clausen * E.g. because they only have micro-SD card slot. For those systems 8149f6e0bffSLars-Peter Clausen * assume that the SD card is always read-write. 8159f6e0bffSLars-Peter Clausen */ 8169f6e0bffSLars-Peter Clausen if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) 8179f6e0bffSLars-Peter Clausen return 0; 8189f6e0bffSLars-Peter Clausen 8199f6e0bffSLars-Peter Clausen if (!host->ops->get_ro) 8209f6e0bffSLars-Peter Clausen return -1; 8219f6e0bffSLars-Peter Clausen 8229f6e0bffSLars-Peter Clausen ro = host->ops->get_ro(host); 8239f6e0bffSLars-Peter Clausen 8249f6e0bffSLars-Peter Clausen return ro; 8259f6e0bffSLars-Peter Clausen } 8269f6e0bffSLars-Peter Clausen 82771578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 82871578a1eSMichal Miroslaw bool reinit) 82971578a1eSMichal Miroslaw { 83071578a1eSMichal Miroslaw int err; 8316abaa0c9SPierre Ossman 83271578a1eSMichal Miroslaw if (!reinit) { 8336abaa0c9SPierre Ossman /* 8346abaa0c9SPierre Ossman * Fetch SCR from card. 8356abaa0c9SPierre Ossman */ 83606c9ccb7SWinkler, Tomas err = mmc_app_send_scr(card); 83717b0429dSPierre Ossman if (err) 83871578a1eSMichal Miroslaw return err; 8396abaa0c9SPierre Ossman 840bd766312SPierre Ossman err = mmc_decode_scr(card); 84171578a1eSMichal Miroslaw if (err) 84271578a1eSMichal Miroslaw return err; 8436abaa0c9SPierre Ossman 8446abaa0c9SPierre Ossman /* 845dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 846dfe86cbaSAdrian Hunter */ 847dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 848dfe86cbaSAdrian Hunter if (err) 849dfe86cbaSAdrian Hunter return err; 850dfe86cbaSAdrian Hunter 851dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 852dfe86cbaSAdrian Hunter mmc_init_erase(card); 853dfe86cbaSAdrian Hunter 854dfe86cbaSAdrian Hunter /* 8556abaa0c9SPierre Ossman * Fetch switch information from card. 8566abaa0c9SPierre Ossman */ 8576abaa0c9SPierre Ossman err = mmc_read_switch(card); 85817b0429dSPierre Ossman if (err) 85971578a1eSMichal Miroslaw return err; 8606abaa0c9SPierre Ossman } 8616abaa0c9SPierre Ossman 8626abaa0c9SPierre Ossman /* 8639d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 8649d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 8659d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 8669d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 8679d9f25c0SWolfgang Muees */ 8689d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 8699d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 8709d9f25c0SWolfgang Muees if (err) 87171578a1eSMichal Miroslaw return err; 8729d9f25c0SWolfgang Muees } 8739d9f25c0SWolfgang Muees 8749d9f25c0SWolfgang Muees /* 87571578a1eSMichal Miroslaw * Check if read-only switch is active. 8766abaa0c9SPierre Ossman */ 87771578a1eSMichal Miroslaw if (!reinit) { 8789f6e0bffSLars-Peter Clausen int ro = mmc_sd_get_ro(host); 87971578a1eSMichal Miroslaw 88071578a1eSMichal Miroslaw if (ro < 0) { 8816606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", 88271578a1eSMichal Miroslaw mmc_hostname(host)); 88371578a1eSMichal Miroslaw } else if (ro > 0) { 88471578a1eSMichal Miroslaw mmc_card_set_readonly(card); 88571578a1eSMichal Miroslaw } 88671578a1eSMichal Miroslaw } 88771578a1eSMichal Miroslaw 88871578a1eSMichal Miroslaw return 0; 88971578a1eSMichal Miroslaw } 89071578a1eSMichal Miroslaw 89171578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 89271578a1eSMichal Miroslaw { 89371578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 8946abaa0c9SPierre Ossman 895cdc99179SSeungwon Jeon if (mmc_card_hs(card)) { 8966abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 8976abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 8986abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8996abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 9006abaa0c9SPierre Ossman } 9016abaa0c9SPierre Ossman 90271578a1eSMichal Miroslaw return max_dtr; 90371578a1eSMichal Miroslaw } 90471578a1eSMichal Miroslaw 9056a11fc47SAdrian Hunter static bool mmc_sd_card_using_v18(struct mmc_card *card) 9066a11fc47SAdrian Hunter { 9076a11fc47SAdrian Hunter /* 9086a11fc47SAdrian Hunter * According to the SD spec., the Bus Speed Mode (function group 1) bits 9096a11fc47SAdrian Hunter * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus 9106a11fc47SAdrian Hunter * they can be used to determine if the card has already switched to 9116a11fc47SAdrian Hunter * 1.8V signaling. 9126a11fc47SAdrian Hunter */ 9136a11fc47SAdrian Hunter return card->sw_caps.sd3_bus_mode & 9146a11fc47SAdrian Hunter (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50); 9156a11fc47SAdrian Hunter } 9166a11fc47SAdrian Hunter 91771578a1eSMichal Miroslaw /* 91871578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 91971578a1eSMichal Miroslaw * 92071578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 92171578a1eSMichal Miroslaw * we're trying to reinitialise. 92271578a1eSMichal Miroslaw */ 92371578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 92471578a1eSMichal Miroslaw struct mmc_card *oldcard) 92571578a1eSMichal Miroslaw { 92671578a1eSMichal Miroslaw struct mmc_card *card; 92771578a1eSMichal Miroslaw int err; 92871578a1eSMichal Miroslaw u32 cid[4]; 929d6d50a15SArindam Nath u32 rocr = 0; 9306a11fc47SAdrian Hunter bool v18_fixup_failed = false; 93171578a1eSMichal Miroslaw 93271578a1eSMichal Miroslaw WARN_ON(!host->claimed); 9336a11fc47SAdrian Hunter retry: 934d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 93571578a1eSMichal Miroslaw if (err) 93671578a1eSMichal Miroslaw return err; 93771578a1eSMichal Miroslaw 93871578a1eSMichal Miroslaw if (oldcard) { 93971578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 94071578a1eSMichal Miroslaw return -ENOENT; 94171578a1eSMichal Miroslaw 94271578a1eSMichal Miroslaw card = oldcard; 94371578a1eSMichal Miroslaw } else { 94471578a1eSMichal Miroslaw /* 94571578a1eSMichal Miroslaw * Allocate card structure. 94671578a1eSMichal Miroslaw */ 94771578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 94871578a1eSMichal Miroslaw if (IS_ERR(card)) 94971578a1eSMichal Miroslaw return PTR_ERR(card); 95071578a1eSMichal Miroslaw 95169041150SUlf Hansson card->ocr = ocr; 95271578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 95371578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 95471578a1eSMichal Miroslaw } 95571578a1eSMichal Miroslaw 95671578a1eSMichal Miroslaw /* 957eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 958eac86321SDoug Anderson */ 959eac86321SDoug Anderson if (host->ops->init_card) 960eac86321SDoug Anderson host->ops->init_card(host, card); 961eac86321SDoug Anderson 962eac86321SDoug Anderson /* 96371578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 96471578a1eSMichal Miroslaw */ 96571578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 96671578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 96771578a1eSMichal Miroslaw if (err) 9687fca9675SWei WANG goto free_card; 96971578a1eSMichal Miroslaw } 97071578a1eSMichal Miroslaw 97171578a1eSMichal Miroslaw if (!oldcard) { 97271578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 97371578a1eSMichal Miroslaw if (err) 9747fca9675SWei WANG goto free_card; 97571578a1eSMichal Miroslaw 97671578a1eSMichal Miroslaw mmc_decode_cid(card); 97771578a1eSMichal Miroslaw } 97871578a1eSMichal Miroslaw 97971578a1eSMichal Miroslaw /* 9803d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 9813d705d14SSascha Hauer * DSR configuration 9823d705d14SSascha Hauer */ 9833d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 9843d705d14SSascha Hauer mmc_set_dsr(host); 9853d705d14SSascha Hauer 9863d705d14SSascha Hauer /* 98771578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 98871578a1eSMichal Miroslaw */ 98971578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 99071578a1eSMichal Miroslaw err = mmc_select_card(card); 99171578a1eSMichal Miroslaw if (err) 9927fca9675SWei WANG goto free_card; 99371578a1eSMichal Miroslaw } 99471578a1eSMichal Miroslaw 99571578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 99671578a1eSMichal Miroslaw if (err) 99771578a1eSMichal Miroslaw goto free_card; 99871578a1eSMichal Miroslaw 9996a11fc47SAdrian Hunter /* 10006a11fc47SAdrian Hunter * If the card has not been power cycled, it may still be using 1.8V 10016a11fc47SAdrian Hunter * signaling. Detect that situation and try to initialize a UHS-I (1.8V) 10026a11fc47SAdrian Hunter * transfer mode. 10036a11fc47SAdrian Hunter */ 10046a11fc47SAdrian Hunter if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) && 10056a11fc47SAdrian Hunter mmc_sd_card_using_v18(card) && 10066a11fc47SAdrian Hunter host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) { 10076a11fc47SAdrian Hunter /* 10086a11fc47SAdrian Hunter * Re-read switch information in case it has changed since 10096a11fc47SAdrian Hunter * oldcard was initialized. 10106a11fc47SAdrian Hunter */ 10116a11fc47SAdrian Hunter if (oldcard) { 10126a11fc47SAdrian Hunter err = mmc_read_switch(card); 10136a11fc47SAdrian Hunter if (err) 10146a11fc47SAdrian Hunter goto free_card; 10156a11fc47SAdrian Hunter } 10166a11fc47SAdrian Hunter if (mmc_sd_card_using_v18(card)) { 10176a11fc47SAdrian Hunter if (mmc_host_set_uhs_voltage(host) || 10186a11fc47SAdrian Hunter mmc_sd_init_uhs_card(card)) { 10196a11fc47SAdrian Hunter v18_fixup_failed = true; 10206a11fc47SAdrian Hunter mmc_power_cycle(host, ocr); 10216a11fc47SAdrian Hunter if (!oldcard) 10226a11fc47SAdrian Hunter mmc_remove_card(card); 10236a11fc47SAdrian Hunter goto retry; 10246a11fc47SAdrian Hunter } 10256a11fc47SAdrian Hunter goto done; 10266a11fc47SAdrian Hunter } 10276a11fc47SAdrian Hunter } 10286a11fc47SAdrian Hunter 1029d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 1030d6743a8aSShawn Lin if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) { 1031d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 1032d6d50a15SArindam Nath if (err) 1033d6d50a15SArindam Nath goto free_card; 1034d6d50a15SArindam Nath } else { 103571578a1eSMichal Miroslaw /* 103671578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 103771578a1eSMichal Miroslaw */ 103871578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 103971578a1eSMichal Miroslaw if (err > 0) 1040cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS); 104171578a1eSMichal Miroslaw else if (err) 104271578a1eSMichal Miroslaw goto free_card; 104371578a1eSMichal Miroslaw 104471578a1eSMichal Miroslaw /* 104571578a1eSMichal Miroslaw * Set bus speed. 104671578a1eSMichal Miroslaw */ 104771578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 10486abaa0c9SPierre Ossman 10496abaa0c9SPierre Ossman /* 10506abaa0c9SPierre Ossman * Switch to wider bus (if supported). 10516abaa0c9SPierre Ossman */ 105271651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 10536abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 10546abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 105517b0429dSPierre Ossman if (err) 10566abaa0c9SPierre Ossman goto free_card; 10576abaa0c9SPierre Ossman 10586abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 10596abaa0c9SPierre Ossman } 1060d6d50a15SArindam Nath } 1061247cfe53SKyle Roeschley 1062247cfe53SKyle Roeschley if (host->caps2 & MMC_CAP2_AVOID_3_3V && 1063247cfe53SKyle Roeschley host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1064247cfe53SKyle Roeschley pr_err("%s: Host failed to negotiate down from 3.3V\n", 1065247cfe53SKyle Roeschley mmc_hostname(host)); 1066247cfe53SKyle Roeschley err = -EINVAL; 1067247cfe53SKyle Roeschley goto free_card; 1068247cfe53SKyle Roeschley } 10696a11fc47SAdrian Hunter done: 10706abaa0c9SPierre Ossman host->card = card; 107117b0429dSPierre Ossman return 0; 10726abaa0c9SPierre Ossman 10736abaa0c9SPierre Ossman free_card: 10746abaa0c9SPierre Ossman if (!oldcard) 10756abaa0c9SPierre Ossman mmc_remove_card(card); 10766abaa0c9SPierre Ossman 1077adf66a0dSPierre Ossman return err; 10786abaa0c9SPierre Ossman } 10796abaa0c9SPierre Ossman 10806abaa0c9SPierre Ossman /* 10817ea239d9SPierre Ossman * Host is being removed. Free up the current card. 10827ea239d9SPierre Ossman */ 10837ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 10847ea239d9SPierre Ossman { 10857ea239d9SPierre Ossman mmc_remove_card(host->card); 10867ea239d9SPierre Ossman host->card = NULL; 10877ea239d9SPierre Ossman } 10887ea239d9SPierre Ossman 10897ea239d9SPierre Ossman /* 1090d3049504SAdrian Hunter * Card detection - card is alive. 1091d3049504SAdrian Hunter */ 1092d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1093d3049504SAdrian Hunter { 1094d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1095d3049504SAdrian Hunter } 1096d3049504SAdrian Hunter 1097d3049504SAdrian Hunter /* 10987ea239d9SPierre Ossman * Card detection callback from host. 10997ea239d9SPierre Ossman */ 11007ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 11017ea239d9SPierre Ossman { 11027ea239d9SPierre Ossman int err; 11037ea239d9SPierre Ossman 11046c0cedd1SAdrian Hunter mmc_get_card(host->card, NULL); 11057ea239d9SPierre Ossman 11067ea239d9SPierre Ossman /* 11077ea239d9SPierre Ossman * Just check if our card has been removed. 11087ea239d9SPierre Ossman */ 1109d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 11107ea239d9SPierre Ossman 11116c0cedd1SAdrian Hunter mmc_put_card(host->card, NULL); 11127ea239d9SPierre Ossman 111317b0429dSPierre Ossman if (err) { 11144101c16aSPierre Ossman mmc_sd_remove(host); 11157ea239d9SPierre Ossman 11167ea239d9SPierre Ossman mmc_claim_host(host); 11177ea239d9SPierre Ossman mmc_detach_bus(host); 11187f7e4129SUlf Hansson mmc_power_off(host); 11197ea239d9SPierre Ossman mmc_release_host(host); 11207ea239d9SPierre Ossman } 11217ea239d9SPierre Ossman } 11227ea239d9SPierre Ossman 11230cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 11246abaa0c9SPierre Ossman { 112585e727edSJaehoon Chung int err = 0; 112685e727edSJaehoon Chung 11276abaa0c9SPierre Ossman mmc_claim_host(host); 11289ec775f7SUlf Hansson 11299ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 11309ec775f7SUlf Hansson goto out; 11319ec775f7SUlf Hansson 1132af517150SDavid Brownell if (!mmc_host_is_spi(host)) 113385e727edSJaehoon Chung err = mmc_deselect_cards(host); 1134cdc99179SSeungwon Jeon 11359ec775f7SUlf Hansson if (!err) { 113674590263SUlf Hansson mmc_power_off(host); 11379ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 11389ec775f7SUlf Hansson } 113995cdfb72SNicolas Pitre 11409ec775f7SUlf Hansson out: 11419ec775f7SUlf Hansson mmc_release_host(host); 114285e727edSJaehoon Chung return err; 11436abaa0c9SPierre Ossman } 11446abaa0c9SPierre Ossman 11456abaa0c9SPierre Ossman /* 11460cb403a2SUlf Hansson * Callback for suspend 11470cb403a2SUlf Hansson */ 11480cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 11490cb403a2SUlf Hansson { 11500cb403a2SUlf Hansson int err; 11510cb403a2SUlf Hansson 11520cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11530cb403a2SUlf Hansson if (!err) { 11540cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 11550cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 11560cb403a2SUlf Hansson } 11570cb403a2SUlf Hansson 11580cb403a2SUlf Hansson return err; 11590cb403a2SUlf Hansson } 11600cb403a2SUlf Hansson 11610cb403a2SUlf Hansson /* 11626abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11636abaa0c9SPierre Ossman * and, if so, restore all state to it. 11646abaa0c9SPierre Ossman */ 11650cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 11666abaa0c9SPierre Ossman { 11679ec775f7SUlf Hansson int err = 0; 11686abaa0c9SPierre Ossman 11696abaa0c9SPierre Ossman mmc_claim_host(host); 11709ec775f7SUlf Hansson 11719ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 11729ec775f7SUlf Hansson goto out; 11739ec775f7SUlf Hansson 117469041150SUlf Hansson mmc_power_up(host, host->card->ocr); 117569041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 11769ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 11772986d0bfSPierre Ossman 11789ec775f7SUlf Hansson out: 11799ec775f7SUlf Hansson mmc_release_host(host); 118095cdfb72SNicolas Pitre return err; 11816abaa0c9SPierre Ossman } 11826abaa0c9SPierre Ossman 1183c4d770d7SUlf Hansson /* 11840cb403a2SUlf Hansson * Callback for resume 11850cb403a2SUlf Hansson */ 11860cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 11870cb403a2SUlf Hansson { 11880cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 1189c29536e8SUlf Hansson return 0; 11900cb403a2SUlf Hansson } 11910cb403a2SUlf Hansson 11920cb403a2SUlf Hansson /* 1193c4d770d7SUlf Hansson * Callback for runtime_suspend. 1194c4d770d7SUlf Hansson */ 1195c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1196c4d770d7SUlf Hansson { 1197c4d770d7SUlf Hansson int err; 1198c4d770d7SUlf Hansson 1199c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1200c4d770d7SUlf Hansson return 0; 1201c4d770d7SUlf Hansson 12020cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 12030cc81a8cSUlf Hansson if (err) 1204f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 1205c4d770d7SUlf Hansson mmc_hostname(host), err); 1206c4d770d7SUlf Hansson 1207c4d770d7SUlf Hansson return err; 1208c4d770d7SUlf Hansson } 1209c4d770d7SUlf Hansson 1210c4d770d7SUlf Hansson /* 1211c4d770d7SUlf Hansson * Callback for runtime_resume. 1212c4d770d7SUlf Hansson */ 1213c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1214c4d770d7SUlf Hansson { 1215c4d770d7SUlf Hansson int err; 1216c4d770d7SUlf Hansson 12170cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1218520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 1219c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 1220c4d770d7SUlf Hansson mmc_hostname(host), err); 1221c4d770d7SUlf Hansson 1222c4d770d7SUlf Hansson return 0; 1223c4d770d7SUlf Hansson } 1224c4d770d7SUlf Hansson 1225dc0ecfefSJohan Rudholm static int mmc_sd_reset(struct mmc_host *host) 1226dc0ecfefSJohan Rudholm { 1227dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr); 12283056c49cSUlf Hansson return mmc_sd_init_card(host, host->card->ocr, host->card); 1229dc0ecfefSJohan Rudholm } 1230dc0ecfefSJohan Rudholm 12319feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 12329feae246SAdrian Hunter .remove = mmc_sd_remove, 12339feae246SAdrian Hunter .detect = mmc_sd_detect, 1234c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1235c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 12369feae246SAdrian Hunter .suspend = mmc_sd_suspend, 12379feae246SAdrian Hunter .resume = mmc_sd_resume, 1238d3049504SAdrian Hunter .alive = mmc_sd_alive, 12395992e786SUlf Hansson .shutdown = mmc_sd_suspend, 1240dc0ecfefSJohan Rudholm .reset = mmc_sd_reset, 12419feae246SAdrian Hunter }; 12429feae246SAdrian Hunter 12437ea239d9SPierre Ossman /* 12447ea239d9SPierre Ossman * Starting point for SD card init. 12457ea239d9SPierre Ossman */ 1246807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 12477ea239d9SPierre Ossman { 12487ea239d9SPierre Ossman int err; 124969041150SUlf Hansson u32 ocr, rocr; 12507ea239d9SPierre Ossman 1251d84075c8SPierre Ossman WARN_ON(!host->claimed); 12527ea239d9SPierre Ossman 1253807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1254807e8e40SAndy Ross if (err) 1255807e8e40SAndy Ross return err; 1256807e8e40SAndy Ross 12572501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops); 12588f230f45STakashi Iwai if (host->ocr_avail_sd) 12598f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 12607ea239d9SPierre Ossman 126155556da0SPhilip Langdale /* 1262af517150SDavid Brownell * We need to get OCR a different way for SPI. 1263af517150SDavid Brownell */ 1264af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1265af517150SDavid Brownell mmc_go_idle(host); 1266af517150SDavid Brownell 1267af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1268af517150SDavid Brownell if (err) 1269af517150SDavid Brownell goto err; 1270af517150SDavid Brownell } 1271af517150SDavid Brownell 127269041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 12737ea239d9SPierre Ossman 12747ea239d9SPierre Ossman /* 12757ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 12767ea239d9SPierre Ossman */ 127769041150SUlf Hansson if (!rocr) { 1278109b5bedSPierre Ossman err = -EINVAL; 12797ea239d9SPierre Ossman goto err; 1280109b5bedSPierre Ossman } 12817ea239d9SPierre Ossman 12827ea239d9SPierre Ossman /* 12836abaa0c9SPierre Ossman * Detect and init the card. 12847ea239d9SPierre Ossman */ 128569041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 128617b0429dSPierre Ossman if (err) 12877ea239d9SPierre Ossman goto err; 12887ea239d9SPierre Ossman 12897ea239d9SPierre Ossman mmc_release_host(host); 12904101c16aSPierre Ossman err = mmc_add_card(host->card); 12917ea239d9SPierre Ossman if (err) 12922986d0bfSPierre Ossman goto remove_card; 12937ea239d9SPierre Ossman 12942860d060SSergei Shtylyov mmc_claim_host(host); 12957ea239d9SPierre Ossman return 0; 12967ea239d9SPierre Ossman 12972986d0bfSPierre Ossman remove_card: 12986abaa0c9SPierre Ossman mmc_remove_card(host->card); 12997ea239d9SPierre Ossman host->card = NULL; 13002986d0bfSPierre Ossman mmc_claim_host(host); 13017ea239d9SPierre Ossman err: 13027ea239d9SPierre Ossman mmc_detach_bus(host); 13037ea239d9SPierre Ossman 1304a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1305109b5bedSPierre Ossman mmc_hostname(host), err); 1306109b5bedSPierre Ossman 1307adf66a0dSPierre Ossman return err; 13087ea239d9SPierre Ossman } 1309