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" 254101c16aSPierre Ossman #include "bus.h" 267ea239d9SPierre Ossman #include "mmc_ops.h" 27ce101496SMark Brown #include "sd.h" 287ea239d9SPierre Ossman #include "sd_ops.h" 297ea239d9SPierre Ossman 307ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 317ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 327ea239d9SPierre Ossman 0, 0, 0, 0 337ea239d9SPierre Ossman }; 347ea239d9SPierre Ossman 357ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 367ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 377ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 387ea239d9SPierre Ossman }; 397ea239d9SPierre Ossman 407ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 417ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 427ea239d9SPierre Ossman }; 437ea239d9SPierre Ossman 447ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 457ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 467ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 477ea239d9SPierre Ossman }; 487ea239d9SPierre Ossman 499288cac0SWolfram Sang static const unsigned int sd_au_size[] = { 509288cac0SWolfram Sang 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, 519288cac0SWolfram Sang SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, 529288cac0SWolfram Sang SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, 539288cac0SWolfram Sang SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, 549288cac0SWolfram Sang }; 559288cac0SWolfram Sang 567ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 577ea239d9SPierre Ossman ({ \ 587ea239d9SPierre Ossman const int __size = size; \ 597ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 607ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 617ea239d9SPierre Ossman const int __shft = (start) & 31; \ 627ea239d9SPierre Ossman u32 __res; \ 637ea239d9SPierre Ossman \ 647ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 657ea239d9SPierre Ossman if (__size + __shft > 32) \ 667ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 677ea239d9SPierre Ossman __res & __mask; \ 687ea239d9SPierre Ossman }) 697ea239d9SPierre Ossman 707ea239d9SPierre Ossman /* 717ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 727ea239d9SPierre Ossman */ 7371578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 747ea239d9SPierre Ossman { 757ea239d9SPierre Ossman u32 *resp = card->raw_cid; 767ea239d9SPierre Ossman 777ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_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); 1147ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1157ea239d9SPierre Ossman csd->tacc_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 1517ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1527ea239d9SPierre Ossman csd->tacc_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; 2289288cac0SWolfram Sang int err, i; 229dfe86cbaSAdrian Hunter u32 *ssr; 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 237dfe86cbaSAdrian Hunter ssr = kmalloc(64, GFP_KERNEL); 238dfe86cbaSAdrian Hunter if (!ssr) 239dfe86cbaSAdrian Hunter return -ENOMEM; 240dfe86cbaSAdrian Hunter 241dfe86cbaSAdrian Hunter err = mmc_app_sd_status(card, ssr); 242dfe86cbaSAdrian Hunter if (err) { 2436606110dSJoe Perches pr_warn("%s: problem reading SD Status register\n", 2446606110dSJoe Perches mmc_hostname(card->host)); 245dfe86cbaSAdrian Hunter err = 0; 246dfe86cbaSAdrian Hunter goto out; 247dfe86cbaSAdrian Hunter } 248dfe86cbaSAdrian Hunter 249dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 250dfe86cbaSAdrian Hunter ssr[i] = be32_to_cpu(ssr[i]); 251dfe86cbaSAdrian Hunter 252dfe86cbaSAdrian Hunter /* 253dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 254dfe86cbaSAdrian Hunter * bitfield positions accordingly. 255dfe86cbaSAdrian Hunter */ 256dfe86cbaSAdrian Hunter au = UNSTUFF_BITS(ssr, 428 - 384, 4); 2579288cac0SWolfram Sang if (au) { 2589288cac0SWolfram Sang if (au <= 9 || card->scr.sda_spec3) { 2599288cac0SWolfram Sang card->ssr.au = sd_au_size[au]; 260dfe86cbaSAdrian Hunter es = UNSTUFF_BITS(ssr, 408 - 384, 16); 261dfe86cbaSAdrian Hunter et = UNSTUFF_BITS(ssr, 402 - 384, 6); 262dfe86cbaSAdrian Hunter if (es && et) { 2639288cac0SWolfram Sang eo = UNSTUFF_BITS(ssr, 400 - 384, 2); 264dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 265dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 266dfe86cbaSAdrian Hunter } 267dfe86cbaSAdrian Hunter } else { 2686606110dSJoe Perches pr_warn("%s: SD Status: Invalid Allocation Unit size\n", 2699288cac0SWolfram Sang mmc_hostname(card->host)); 2709288cac0SWolfram Sang } 271dfe86cbaSAdrian Hunter } 272dfe86cbaSAdrian Hunter out: 273dfe86cbaSAdrian Hunter kfree(ssr); 274dfe86cbaSAdrian Hunter return err; 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 29417b0429dSPierre Ossman err = -EIO; 2957ea239d9SPierre Ossman 2967ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2977ea239d9SPierre Ossman if (!status) { 298a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 299013909c4SArindam Nath "switch capabilities.\n", 300013909c4SArindam Nath mmc_hostname(card->host)); 30117b0429dSPierre Ossman return -ENOMEM; 3027ea239d9SPierre Ossman } 3037ea239d9SPierre Ossman 304a39ca6aeSAaron Lu /* 305a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation. 306a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not 307a39ca6aeSAaron Lu * change with the arguments. 308a39ca6aeSAaron Lu */ 309a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status); 31017b0429dSPierre Ossman if (err) { 311013909c4SArindam Nath /* 312013909c4SArindam Nath * If the host or the card can't do the switch, 313013909c4SArindam Nath * fail more gracefully. 314013909c4SArindam Nath */ 315013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 316adf66a0dSPierre Ossman goto out; 317adf66a0dSPierre Ossman 3186606110dSJoe Perches pr_warn("%s: problem reading Bus Speed modes\n", 3193373c0aeSPierre Ossman mmc_hostname(card->host)); 32017b0429dSPierre Ossman err = 0; 321adf66a0dSPierre Ossman 3227ea239d9SPierre Ossman goto out; 3237ea239d9SPierre Ossman } 3247ea239d9SPierre Ossman 325fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED) 326fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; 327f2815f68SSubhash Jadavani 328013909c4SArindam Nath if (card->scr.sda_spec3) { 329013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 330a39ca6aeSAaron Lu /* Driver Strengths supported by the card */ 331013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 332013909c4SArindam Nath } 3337ea239d9SPierre Ossman 3341addfcdbSPierre Ossman out: 3351addfcdbSPierre Ossman kfree(status); 3361addfcdbSPierre Ossman 3371addfcdbSPierre Ossman return err; 3381addfcdbSPierre Ossman } 3391addfcdbSPierre Ossman 3401addfcdbSPierre Ossman /* 3411addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3421addfcdbSPierre Ossman */ 34371578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3441addfcdbSPierre Ossman { 3451addfcdbSPierre Ossman int err; 3461addfcdbSPierre Ossman u8 *status; 3471addfcdbSPierre Ossman 3483373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 34917b0429dSPierre Ossman return 0; 3503373c0aeSPierre Ossman 3513373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 35217b0429dSPierre Ossman return 0; 3533373c0aeSPierre Ossman 3541addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 35517b0429dSPierre Ossman return 0; 3561addfcdbSPierre Ossman 3571addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 35817b0429dSPierre Ossman return 0; 3591addfcdbSPierre Ossman 3601addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 3611addfcdbSPierre Ossman if (!status) { 362a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 363facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 36417b0429dSPierre Ossman return -ENOMEM; 3651addfcdbSPierre Ossman } 3661addfcdbSPierre Ossman 3677ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 36817b0429dSPierre Ossman if (err) 3697ea239d9SPierre Ossman goto out; 3707ea239d9SPierre Ossman 3717ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 3726606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n", 3737ea239d9SPierre Ossman mmc_hostname(card->host)); 37471578a1eSMichal Miroslaw err = 0; 3757ea239d9SPierre Ossman } else { 37671578a1eSMichal Miroslaw err = 1; 3777ea239d9SPierre Ossman } 3787ea239d9SPierre Ossman 3797ea239d9SPierre Ossman out: 3807ea239d9SPierre Ossman kfree(status); 3817ea239d9SPierre Ossman 3827ea239d9SPierre Ossman return err; 3837ea239d9SPierre Ossman } 3847ea239d9SPierre Ossman 385d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 386d6d50a15SArindam Nath { 387fa021cefSAdrian Hunter int card_drv_type, drive_strength, drv_type; 388d6d50a15SArindam Nath int err; 389d6d50a15SArindam Nath 3903853a042SAdrian Hunter card->drive_strength = 0; 3913853a042SAdrian Hunter 392fa021cefSAdrian Hunter card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; 393ca8e99b3SPhilip Rakity 394e23350b3SAdrian Hunter drive_strength = mmc_select_drive_strength(card, 395ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 396e23350b3SAdrian Hunter card_drv_type, &drv_type); 397ca8e99b3SPhilip Rakity 398b4f30a17SAdrian Hunter if (drive_strength) { 399ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 400d6d50a15SArindam Nath if (err) 401d6d50a15SArindam Nath return err; 402ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 4036606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n", 404d6d50a15SArindam Nath mmc_hostname(card->host)); 405d6d50a15SArindam Nath return 0; 406d6d50a15SArindam Nath } 4073853a042SAdrian Hunter card->drive_strength = drive_strength; 408b4f30a17SAdrian Hunter } 409d6d50a15SArindam Nath 410b4f30a17SAdrian Hunter if (drv_type) 411b4f30a17SAdrian Hunter mmc_set_driver_type(card->host, drv_type); 412d6d50a15SArindam Nath 413d6d50a15SArindam Nath return 0; 414d6d50a15SArindam Nath } 415d6d50a15SArindam Nath 41693c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 41749c468fcSArindam Nath { 41849c468fcSArindam Nath /* 41949c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 42049c468fcSArindam Nath * default speed. 42149c468fcSArindam Nath */ 4223f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 42393c712f9SSubhash Jadavani card->sd_bus_speed = 0; 42493c712f9SSubhash Jadavani return; 42593c712f9SSubhash Jadavani } 42649c468fcSArindam Nath 42749c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 42849c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 42993c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 43049c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 43149c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 43293c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 43349c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43449c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 43549c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 43693c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 43749c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43849c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 43949c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 44093c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 44149c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 44249c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 44349c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 44449c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 44593c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 44693c712f9SSubhash Jadavani } 44749c468fcSArindam Nath } 44849c468fcSArindam Nath 44993c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 45093c712f9SSubhash Jadavani { 45193c712f9SSubhash Jadavani int err; 45293c712f9SSubhash Jadavani unsigned int timing = 0; 45393c712f9SSubhash Jadavani 45493c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 45593c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 45693c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 45793c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 45893c712f9SSubhash Jadavani break; 45993c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 46093c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 46193c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 46293c712f9SSubhash Jadavani break; 46393c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 46493c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 46593c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 46693c712f9SSubhash Jadavani break; 46793c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 46893c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 46993c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 47093c712f9SSubhash Jadavani break; 47193c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 47293c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 47393c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 47493c712f9SSubhash Jadavani break; 47593c712f9SSubhash Jadavani default: 47693c712f9SSubhash Jadavani return 0; 47793c712f9SSubhash Jadavani } 47893c712f9SSubhash Jadavani 47993c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 48049c468fcSArindam Nath if (err) 48149c468fcSArindam Nath return err; 48249c468fcSArindam Nath 48393c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 4846606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n", 48549c468fcSArindam Nath mmc_hostname(card->host)); 48649c468fcSArindam Nath else { 48749c468fcSArindam Nath mmc_set_timing(card->host, timing); 48849c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 48949c468fcSArindam Nath } 49049c468fcSArindam Nath 49149c468fcSArindam Nath return 0; 49249c468fcSArindam Nath } 49349c468fcSArindam Nath 49455c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 49555c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 49655c4665eSAaron Lu { 49755c4665eSAaron Lu u32 voltage, max_current; 49855c4665eSAaron Lu 49955c4665eSAaron Lu voltage = 1 << host->ios.vdd; 50055c4665eSAaron Lu switch (voltage) { 50155c4665eSAaron Lu case MMC_VDD_165_195: 50255c4665eSAaron Lu max_current = host->max_current_180; 50355c4665eSAaron Lu break; 50455c4665eSAaron Lu case MMC_VDD_29_30: 50555c4665eSAaron Lu case MMC_VDD_30_31: 50655c4665eSAaron Lu max_current = host->max_current_300; 50755c4665eSAaron Lu break; 50855c4665eSAaron Lu case MMC_VDD_32_33: 50955c4665eSAaron Lu case MMC_VDD_33_34: 51055c4665eSAaron Lu max_current = host->max_current_330; 51155c4665eSAaron Lu break; 51255c4665eSAaron Lu default: 51355c4665eSAaron Lu max_current = 0; 51455c4665eSAaron Lu } 51555c4665eSAaron Lu 51655c4665eSAaron Lu return max_current; 51755c4665eSAaron Lu } 51855c4665eSAaron Lu 5195371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5205371c927SArindam Nath { 5210aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5225371c927SArindam Nath int err; 52355c4665eSAaron Lu u32 max_current; 5245371c927SArindam Nath 5255371c927SArindam Nath /* 5265371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5270aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5280aa67700SPhilip Rakity * current limit. 52955c4665eSAaron Lu */ 53055c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 53155c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 53255c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 53355c4665eSAaron Lu return 0; 53455c4665eSAaron Lu 53555c4665eSAaron Lu /* 53655c4665eSAaron Lu * Host has different current capabilities when operating at 53755c4665eSAaron Lu * different voltages, so find out its max current first. 53855c4665eSAaron Lu */ 53955c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 54055c4665eSAaron Lu 54155c4665eSAaron Lu /* 542a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 543a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 544a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 545a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 546a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 547a39ca6aeSAaron Lu * maximum 300ma from the host. 5485371c927SArindam Nath */ 54955c4665eSAaron Lu if (max_current >= 800) 5505371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 55155c4665eSAaron Lu else if (max_current >= 600) 5525371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 55355c4665eSAaron Lu else if (max_current >= 400) 5545371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 55555c4665eSAaron Lu else if (max_current >= 200) 5565371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5575371c927SArindam Nath 5580aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 5595371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5605371c927SArindam Nath if (err) 5615371c927SArindam Nath return err; 5625371c927SArindam Nath 5635371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 5646606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n", 5655371c927SArindam Nath mmc_hostname(card->host)); 5665371c927SArindam Nath 5670aa67700SPhilip Rakity } 568a39ca6aeSAaron Lu 5695371c927SArindam Nath return 0; 5705371c927SArindam Nath } 5715371c927SArindam Nath 572d6d50a15SArindam Nath /* 573d6d50a15SArindam Nath * UHS-I specific initialization procedure 574d6d50a15SArindam Nath */ 575d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 576d6d50a15SArindam Nath { 577d6d50a15SArindam Nath int err; 578d6d50a15SArindam Nath u8 *status; 579d6d50a15SArindam Nath 580d6d50a15SArindam Nath if (!card->scr.sda_spec3) 581d6d50a15SArindam Nath return 0; 582d6d50a15SArindam Nath 583d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 584d6d50a15SArindam Nath return 0; 585d6d50a15SArindam Nath 586d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 587d6d50a15SArindam Nath if (!status) { 588a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 589d6d50a15SArindam Nath "switch capabilities.\n", mmc_hostname(card->host)); 590d6d50a15SArindam Nath return -ENOMEM; 591d6d50a15SArindam Nath } 592d6d50a15SArindam Nath 593d6d50a15SArindam Nath /* Set 4-bit bus width */ 594d6d50a15SArindam Nath if ((card->host->caps & MMC_CAP_4_BIT_DATA) && 595d6d50a15SArindam Nath (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 596d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 597d6d50a15SArindam Nath if (err) 598d6d50a15SArindam Nath goto out; 599d6d50a15SArindam Nath 600d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 601d6d50a15SArindam Nath } 602d6d50a15SArindam Nath 60393c712f9SSubhash Jadavani /* 60493c712f9SSubhash Jadavani * Select the bus speed mode depending on host 60593c712f9SSubhash Jadavani * and card capability. 60693c712f9SSubhash Jadavani */ 60793c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 60893c712f9SSubhash Jadavani 609d6d50a15SArindam Nath /* Set the driver strength for the card */ 610d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 61149c468fcSArindam Nath if (err) 61249c468fcSArindam Nath goto out; 61349c468fcSArindam Nath 61493c712f9SSubhash Jadavani /* Set current limit for the card */ 61593c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6165371c927SArindam Nath if (err) 6175371c927SArindam Nath goto out; 6185371c927SArindam Nath 61993c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 62093c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 621b513ea25SArindam Nath if (err) 622b513ea25SArindam Nath goto out; 623b513ea25SArindam Nath 624810e08eeSFredrik Soderstedt /* 625810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 626810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 627810e08eeSFredrik Soderstedt */ 62863e415c6SAdrian Hunter if (!mmc_host_is_spi(card->host) && 629810e08eeSFredrik Soderstedt (card->sd_bus_speed == UHS_SDR50_BUS_SPEED || 6304324f6deSWeijun Yang card->sd_bus_speed == UHS_DDR50_BUS_SPEED || 6314324f6deSWeijun Yang card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) { 63263e415c6SAdrian Hunter err = mmc_execute_tuning(card); 6334324f6deSWeijun Yang 6344324f6deSWeijun Yang /* 6354324f6deSWeijun Yang * As SD Specifications Part1 Physical Layer Specification 6364324f6deSWeijun Yang * Version 3.01 says, CMD19 tuning is available for unlocked 6374324f6deSWeijun Yang * cards in transfer state of 1.8V signaling mode. The small 6384324f6deSWeijun Yang * difference between v3.00 and 3.01 spec means that CMD19 6394324f6deSWeijun Yang * tuning is also available for DDR50 mode. 6404324f6deSWeijun Yang */ 6414324f6deSWeijun Yang if (err && card->sd_bus_speed == UHS_DDR50_BUS_SPEED) { 6424324f6deSWeijun Yang pr_warn("%s: ddr50 tuning failed\n", 6434324f6deSWeijun Yang mmc_hostname(card->host)); 6444324f6deSWeijun Yang err = 0; 6454324f6deSWeijun Yang } 6464324f6deSWeijun Yang } 6474324f6deSWeijun Yang 648d6d50a15SArindam Nath out: 649d6d50a15SArindam Nath kfree(status); 650d6d50a15SArindam Nath 651d6d50a15SArindam Nath return err; 652d6d50a15SArindam Nath } 653d6d50a15SArindam Nath 65451ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 65551ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 65651ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 65751ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 65851ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 65951ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 660dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 661dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 66251ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 66351ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 66451ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 66551ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 66651ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 66751ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 66851ec92e2SPierre Ossman 66951ec92e2SPierre Ossman 67051ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 67151ec92e2SPierre Ossman &dev_attr_cid.attr, 67251ec92e2SPierre Ossman &dev_attr_csd.attr, 67351ec92e2SPierre Ossman &dev_attr_scr.attr, 67451ec92e2SPierre Ossman &dev_attr_date.attr, 675dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 676dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 67751ec92e2SPierre Ossman &dev_attr_fwrev.attr, 67851ec92e2SPierre Ossman &dev_attr_hwrev.attr, 67951ec92e2SPierre Ossman &dev_attr_manfid.attr, 68051ec92e2SPierre Ossman &dev_attr_name.attr, 68151ec92e2SPierre Ossman &dev_attr_oemid.attr, 68251ec92e2SPierre Ossman &dev_attr_serial.attr, 68351ec92e2SPierre Ossman NULL, 68451ec92e2SPierre Ossman }; 685d1e58212SAxel Lin ATTRIBUTE_GROUPS(sd_std); 68651ec92e2SPierre Ossman 68771578a1eSMichal Miroslaw struct device_type sd_type = { 688d1e58212SAxel Lin .groups = sd_std_groups, 68951ec92e2SPierre Ossman }; 69051ec92e2SPierre Ossman 6917ea239d9SPierre Ossman /* 69271578a1eSMichal Miroslaw * Fetch CID from card. 6936abaa0c9SPierre Ossman */ 694d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 6956abaa0c9SPierre Ossman { 6966abaa0c9SPierre Ossman int err; 69755c4665eSAaron Lu u32 max_current; 6980797e5f1SJohan Rudholm int retries = 10; 69969041150SUlf Hansson u32 pocr = ocr; 7000797e5f1SJohan Rudholm 7010797e5f1SJohan Rudholm try_again: 7020797e5f1SJohan Rudholm if (!retries) { 7030797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 7046606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); 7050797e5f1SJohan Rudholm } 7066abaa0c9SPierre Ossman 7076abaa0c9SPierre Ossman /* 7086abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 7096abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 7106abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 7116abaa0c9SPierre Ossman * respond. 7126abaa0c9SPierre Ossman */ 7136abaa0c9SPierre Ossman mmc_go_idle(host); 7146abaa0c9SPierre Ossman 7156abaa0c9SPierre Ossman /* 7166abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 7176abaa0c9SPierre Ossman * compliant card and we should set bit 30 7186abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 7196abaa0c9SPierre Ossman * block-addressed SDHC cards. 7206abaa0c9SPierre Ossman */ 7216abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 72217b0429dSPierre Ossman if (!err) 723f2119df6SArindam Nath ocr |= SD_OCR_CCS; 7246abaa0c9SPierre Ossman 725f2119df6SArindam Nath /* 726f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 7270797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 7280797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 729f2119df6SArindam Nath */ 7300797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 731f2119df6SArindam Nath ocr |= SD_OCR_S18R; 732f2119df6SArindam Nath 73355c4665eSAaron Lu /* 73455c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 73555c4665eSAaron Lu * XPC should be set to 1. 73655c4665eSAaron Lu */ 73755c4665eSAaron Lu max_current = sd_get_host_max_current(host); 73855c4665eSAaron Lu if (max_current > 150) 739f2119df6SArindam Nath ocr |= SD_OCR_XPC; 740f2119df6SArindam Nath 741d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 74217b0429dSPierre Ossman if (err) 74371578a1eSMichal Miroslaw return err; 7446abaa0c9SPierre Ossman 745f2119df6SArindam Nath /* 746f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 747f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 748f2119df6SArindam Nath */ 749d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 750d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 7510f791fdaSUlf Hansson err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 75269041150SUlf Hansson pocr); 7530797e5f1SJohan Rudholm if (err == -EAGAIN) { 7540797e5f1SJohan Rudholm retries--; 7550797e5f1SJohan Rudholm goto try_again; 7560797e5f1SJohan Rudholm } else if (err) { 7570797e5f1SJohan Rudholm retries = 0; 758f2119df6SArindam Nath goto try_again; 759f2119df6SArindam Nath } 760f2119df6SArindam Nath } 761f2119df6SArindam Nath 762af517150SDavid Brownell if (mmc_host_is_spi(host)) 763af517150SDavid Brownell err = mmc_send_cid(host, cid); 764af517150SDavid Brownell else 7656abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 7666abaa0c9SPierre Ossman 76771578a1eSMichal Miroslaw return err; 768adf66a0dSPierre Ossman } 7696abaa0c9SPierre Ossman 77071578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 77171578a1eSMichal Miroslaw { 77271578a1eSMichal Miroslaw int err; 7736abaa0c9SPierre Ossman 7746abaa0c9SPierre Ossman /* 7756abaa0c9SPierre Ossman * Fetch CSD from card. 7766abaa0c9SPierre Ossman */ 7776abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 77817b0429dSPierre Ossman if (err) 77971578a1eSMichal Miroslaw return err; 7806abaa0c9SPierre Ossman 781bd766312SPierre Ossman err = mmc_decode_csd(card); 782adf66a0dSPierre Ossman if (err) 78371578a1eSMichal Miroslaw return err; 784bd766312SPierre Ossman 78571578a1eSMichal Miroslaw return 0; 7866abaa0c9SPierre Ossman } 7876abaa0c9SPierre Ossman 7889f6e0bffSLars-Peter Clausen static int mmc_sd_get_ro(struct mmc_host *host) 7899f6e0bffSLars-Peter Clausen { 7909f6e0bffSLars-Peter Clausen int ro; 7919f6e0bffSLars-Peter Clausen 7929f6e0bffSLars-Peter Clausen /* 7939f6e0bffSLars-Peter Clausen * Some systems don't feature a write-protect pin and don't need one. 7949f6e0bffSLars-Peter Clausen * E.g. because they only have micro-SD card slot. For those systems 7959f6e0bffSLars-Peter Clausen * assume that the SD card is always read-write. 7969f6e0bffSLars-Peter Clausen */ 7979f6e0bffSLars-Peter Clausen if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) 7989f6e0bffSLars-Peter Clausen return 0; 7999f6e0bffSLars-Peter Clausen 8009f6e0bffSLars-Peter Clausen if (!host->ops->get_ro) 8019f6e0bffSLars-Peter Clausen return -1; 8029f6e0bffSLars-Peter Clausen 8039f6e0bffSLars-Peter Clausen mmc_host_clk_hold(host); 8049f6e0bffSLars-Peter Clausen ro = host->ops->get_ro(host); 8059f6e0bffSLars-Peter Clausen mmc_host_clk_release(host); 8069f6e0bffSLars-Peter Clausen 8079f6e0bffSLars-Peter Clausen return ro; 8089f6e0bffSLars-Peter Clausen } 8099f6e0bffSLars-Peter Clausen 81071578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 81171578a1eSMichal Miroslaw bool reinit) 81271578a1eSMichal Miroslaw { 81371578a1eSMichal Miroslaw int err; 8146abaa0c9SPierre Ossman 81571578a1eSMichal Miroslaw if (!reinit) { 8166abaa0c9SPierre Ossman /* 8176abaa0c9SPierre Ossman * Fetch SCR from card. 8186abaa0c9SPierre Ossman */ 8196abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 82017b0429dSPierre Ossman if (err) 82171578a1eSMichal Miroslaw return err; 8226abaa0c9SPierre Ossman 823bd766312SPierre Ossman err = mmc_decode_scr(card); 82471578a1eSMichal Miroslaw if (err) 82571578a1eSMichal Miroslaw return err; 8266abaa0c9SPierre Ossman 8276abaa0c9SPierre Ossman /* 828dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 829dfe86cbaSAdrian Hunter */ 830dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 831dfe86cbaSAdrian Hunter if (err) 832dfe86cbaSAdrian Hunter return err; 833dfe86cbaSAdrian Hunter 834dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 835dfe86cbaSAdrian Hunter mmc_init_erase(card); 836dfe86cbaSAdrian Hunter 837dfe86cbaSAdrian Hunter /* 8386abaa0c9SPierre Ossman * Fetch switch information from card. 8396abaa0c9SPierre Ossman */ 8406abaa0c9SPierre Ossman err = mmc_read_switch(card); 84117b0429dSPierre Ossman if (err) 84271578a1eSMichal Miroslaw return err; 8436abaa0c9SPierre Ossman } 8446abaa0c9SPierre Ossman 8456abaa0c9SPierre Ossman /* 8469d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 8479d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 8489d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 8499d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 8509d9f25c0SWolfgang Muees */ 8519d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 8529d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 8539d9f25c0SWolfgang Muees if (err) 85471578a1eSMichal Miroslaw return err; 8559d9f25c0SWolfgang Muees } 8569d9f25c0SWolfgang Muees 8579d9f25c0SWolfgang Muees /* 85871578a1eSMichal Miroslaw * Check if read-only switch is active. 8596abaa0c9SPierre Ossman */ 86071578a1eSMichal Miroslaw if (!reinit) { 8619f6e0bffSLars-Peter Clausen int ro = mmc_sd_get_ro(host); 86271578a1eSMichal Miroslaw 86371578a1eSMichal Miroslaw if (ro < 0) { 8646606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", 86571578a1eSMichal Miroslaw mmc_hostname(host)); 86671578a1eSMichal Miroslaw } else if (ro > 0) { 86771578a1eSMichal Miroslaw mmc_card_set_readonly(card); 86871578a1eSMichal Miroslaw } 86971578a1eSMichal Miroslaw } 87071578a1eSMichal Miroslaw 87171578a1eSMichal Miroslaw return 0; 87271578a1eSMichal Miroslaw } 87371578a1eSMichal Miroslaw 87471578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 87571578a1eSMichal Miroslaw { 87671578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 8776abaa0c9SPierre Ossman 878cdc99179SSeungwon Jeon if (mmc_card_hs(card)) { 8796abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 8806abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 8816abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8826abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 8836abaa0c9SPierre Ossman } 8846abaa0c9SPierre Ossman 88571578a1eSMichal Miroslaw return max_dtr; 88671578a1eSMichal Miroslaw } 88771578a1eSMichal Miroslaw 88871578a1eSMichal Miroslaw /* 88971578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 89071578a1eSMichal Miroslaw * 89171578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 89271578a1eSMichal Miroslaw * we're trying to reinitialise. 89371578a1eSMichal Miroslaw */ 89471578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 89571578a1eSMichal Miroslaw struct mmc_card *oldcard) 89671578a1eSMichal Miroslaw { 89771578a1eSMichal Miroslaw struct mmc_card *card; 89871578a1eSMichal Miroslaw int err; 89971578a1eSMichal Miroslaw u32 cid[4]; 900d6d50a15SArindam Nath u32 rocr = 0; 90171578a1eSMichal Miroslaw 90271578a1eSMichal Miroslaw BUG_ON(!host); 90371578a1eSMichal Miroslaw WARN_ON(!host->claimed); 90471578a1eSMichal Miroslaw 905d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 90671578a1eSMichal Miroslaw if (err) 90771578a1eSMichal Miroslaw return err; 90871578a1eSMichal Miroslaw 90971578a1eSMichal Miroslaw if (oldcard) { 91071578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 91171578a1eSMichal Miroslaw return -ENOENT; 91271578a1eSMichal Miroslaw 91371578a1eSMichal Miroslaw card = oldcard; 91471578a1eSMichal Miroslaw } else { 91571578a1eSMichal Miroslaw /* 91671578a1eSMichal Miroslaw * Allocate card structure. 91771578a1eSMichal Miroslaw */ 91871578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 91971578a1eSMichal Miroslaw if (IS_ERR(card)) 92071578a1eSMichal Miroslaw return PTR_ERR(card); 92171578a1eSMichal Miroslaw 92269041150SUlf Hansson card->ocr = ocr; 92371578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 92471578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 92571578a1eSMichal Miroslaw } 92671578a1eSMichal Miroslaw 92771578a1eSMichal Miroslaw /* 928eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 929eac86321SDoug Anderson */ 930eac86321SDoug Anderson if (host->ops->init_card) 931eac86321SDoug Anderson host->ops->init_card(host, card); 932eac86321SDoug Anderson 933eac86321SDoug Anderson /* 93471578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 93571578a1eSMichal Miroslaw */ 93671578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 93771578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 93871578a1eSMichal Miroslaw if (err) 9397fca9675SWei WANG goto free_card; 94071578a1eSMichal Miroslaw } 94171578a1eSMichal Miroslaw 94271578a1eSMichal Miroslaw if (!oldcard) { 94371578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 94471578a1eSMichal Miroslaw if (err) 9457fca9675SWei WANG goto free_card; 94671578a1eSMichal Miroslaw 94771578a1eSMichal Miroslaw mmc_decode_cid(card); 94871578a1eSMichal Miroslaw } 94971578a1eSMichal Miroslaw 95071578a1eSMichal Miroslaw /* 9513d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 9523d705d14SSascha Hauer * DSR configuration 9533d705d14SSascha Hauer */ 9543d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 9553d705d14SSascha Hauer mmc_set_dsr(host); 9563d705d14SSascha Hauer 9573d705d14SSascha Hauer /* 95871578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 95971578a1eSMichal Miroslaw */ 96071578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 96171578a1eSMichal Miroslaw err = mmc_select_card(card); 96271578a1eSMichal Miroslaw if (err) 9637fca9675SWei WANG goto free_card; 96471578a1eSMichal Miroslaw } 96571578a1eSMichal Miroslaw 96671578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 96771578a1eSMichal Miroslaw if (err) 96871578a1eSMichal Miroslaw goto free_card; 96971578a1eSMichal Miroslaw 970d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 971d6d50a15SArindam Nath if (rocr & SD_ROCR_S18A) { 972d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 973d6d50a15SArindam Nath if (err) 974d6d50a15SArindam Nath goto free_card; 975d6d50a15SArindam Nath } else { 97671578a1eSMichal Miroslaw /* 97771578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 97871578a1eSMichal Miroslaw */ 97971578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 98071578a1eSMichal Miroslaw if (err > 0) 981cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS); 98271578a1eSMichal Miroslaw else if (err) 98371578a1eSMichal Miroslaw goto free_card; 98471578a1eSMichal Miroslaw 98571578a1eSMichal Miroslaw /* 98671578a1eSMichal Miroslaw * Set bus speed. 98771578a1eSMichal Miroslaw */ 98871578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 9896abaa0c9SPierre Ossman 9906abaa0c9SPierre Ossman /* 9916abaa0c9SPierre Ossman * Switch to wider bus (if supported). 9926abaa0c9SPierre Ossman */ 99371651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 9946abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 9956abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 99617b0429dSPierre Ossman if (err) 9976abaa0c9SPierre Ossman goto free_card; 9986abaa0c9SPierre Ossman 9996abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 10006abaa0c9SPierre Ossman } 1001d6d50a15SArindam Nath } 10026abaa0c9SPierre Ossman 10036abaa0c9SPierre Ossman host->card = card; 100417b0429dSPierre Ossman return 0; 10056abaa0c9SPierre Ossman 10066abaa0c9SPierre Ossman free_card: 10076abaa0c9SPierre Ossman if (!oldcard) 10086abaa0c9SPierre Ossman mmc_remove_card(card); 10096abaa0c9SPierre Ossman 1010adf66a0dSPierre Ossman return err; 10116abaa0c9SPierre Ossman } 10126abaa0c9SPierre Ossman 10136abaa0c9SPierre Ossman /* 10147ea239d9SPierre Ossman * Host is being removed. Free up the current card. 10157ea239d9SPierre Ossman */ 10167ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 10177ea239d9SPierre Ossman { 10187ea239d9SPierre Ossman BUG_ON(!host); 10197ea239d9SPierre Ossman BUG_ON(!host->card); 10207ea239d9SPierre Ossman 10217ea239d9SPierre Ossman mmc_remove_card(host->card); 10227ea239d9SPierre Ossman host->card = NULL; 10237ea239d9SPierre Ossman } 10247ea239d9SPierre Ossman 10257ea239d9SPierre Ossman /* 1026d3049504SAdrian Hunter * Card detection - card is alive. 1027d3049504SAdrian Hunter */ 1028d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1029d3049504SAdrian Hunter { 1030d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1031d3049504SAdrian Hunter } 1032d3049504SAdrian Hunter 1033d3049504SAdrian Hunter /* 10347ea239d9SPierre Ossman * Card detection callback from host. 10357ea239d9SPierre Ossman */ 10367ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 10377ea239d9SPierre Ossman { 10387ea239d9SPierre Ossman int err; 10397ea239d9SPierre Ossman 10407ea239d9SPierre Ossman BUG_ON(!host); 10417ea239d9SPierre Ossman BUG_ON(!host->card); 10427ea239d9SPierre Ossman 1043e94cfef6SUlf Hansson mmc_get_card(host->card); 10447ea239d9SPierre Ossman 10457ea239d9SPierre Ossman /* 10467ea239d9SPierre Ossman * Just check if our card has been removed. 10477ea239d9SPierre Ossman */ 1048d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 10497ea239d9SPierre Ossman 1050e94cfef6SUlf Hansson mmc_put_card(host->card); 10517ea239d9SPierre Ossman 105217b0429dSPierre Ossman if (err) { 10534101c16aSPierre Ossman mmc_sd_remove(host); 10547ea239d9SPierre Ossman 10557ea239d9SPierre Ossman mmc_claim_host(host); 10567ea239d9SPierre Ossman mmc_detach_bus(host); 10577f7e4129SUlf Hansson mmc_power_off(host); 10587ea239d9SPierre Ossman mmc_release_host(host); 10597ea239d9SPierre Ossman } 10607ea239d9SPierre Ossman } 10617ea239d9SPierre Ossman 10620cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 10636abaa0c9SPierre Ossman { 106485e727edSJaehoon Chung int err = 0; 106585e727edSJaehoon Chung 10666abaa0c9SPierre Ossman BUG_ON(!host); 10676abaa0c9SPierre Ossman BUG_ON(!host->card); 10686abaa0c9SPierre Ossman 10696abaa0c9SPierre Ossman mmc_claim_host(host); 10709ec775f7SUlf Hansson 10719ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 10729ec775f7SUlf Hansson goto out; 10739ec775f7SUlf Hansson 1074af517150SDavid Brownell if (!mmc_host_is_spi(host)) 107585e727edSJaehoon Chung err = mmc_deselect_cards(host); 1076cdc99179SSeungwon Jeon 10779ec775f7SUlf Hansson if (!err) { 107874590263SUlf Hansson mmc_power_off(host); 10799ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 10809ec775f7SUlf Hansson } 108195cdfb72SNicolas Pitre 10829ec775f7SUlf Hansson out: 10839ec775f7SUlf Hansson mmc_release_host(host); 108485e727edSJaehoon Chung return err; 10856abaa0c9SPierre Ossman } 10866abaa0c9SPierre Ossman 10876abaa0c9SPierre Ossman /* 10880cb403a2SUlf Hansson * Callback for suspend 10890cb403a2SUlf Hansson */ 10900cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 10910cb403a2SUlf Hansson { 10920cb403a2SUlf Hansson int err; 10930cb403a2SUlf Hansson 10940cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 10950cb403a2SUlf Hansson if (!err) { 10960cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 10970cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 10980cb403a2SUlf Hansson } 10990cb403a2SUlf Hansson 11000cb403a2SUlf Hansson return err; 11010cb403a2SUlf Hansson } 11020cb403a2SUlf Hansson 11030cb403a2SUlf Hansson /* 11046abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11056abaa0c9SPierre Ossman * and, if so, restore all state to it. 11066abaa0c9SPierre Ossman */ 11070cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 11086abaa0c9SPierre Ossman { 11099ec775f7SUlf Hansson int err = 0; 11106abaa0c9SPierre Ossman 11116abaa0c9SPierre Ossman BUG_ON(!host); 11126abaa0c9SPierre Ossman BUG_ON(!host->card); 11136abaa0c9SPierre Ossman 11146abaa0c9SPierre Ossman mmc_claim_host(host); 11159ec775f7SUlf Hansson 11169ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 11179ec775f7SUlf Hansson goto out; 11189ec775f7SUlf Hansson 111969041150SUlf Hansson mmc_power_up(host, host->card->ocr); 112069041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 11219ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 11222986d0bfSPierre Ossman 11239ec775f7SUlf Hansson out: 11249ec775f7SUlf Hansson mmc_release_host(host); 112595cdfb72SNicolas Pitre return err; 11266abaa0c9SPierre Ossman } 11276abaa0c9SPierre Ossman 1128c4d770d7SUlf Hansson /* 11290cb403a2SUlf Hansson * Callback for resume 11300cb403a2SUlf Hansson */ 11310cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 11320cb403a2SUlf Hansson { 11334d223782SUlf Hansson int err = 0; 11340cb403a2SUlf Hansson 11354d223782SUlf Hansson if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { 11360cb403a2SUlf Hansson err = _mmc_sd_resume(host); 11370cb403a2SUlf Hansson pm_runtime_set_active(&host->card->dev); 11380cb403a2SUlf Hansson pm_runtime_mark_last_busy(&host->card->dev); 11394d223782SUlf Hansson } 11400cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 11410cb403a2SUlf Hansson 11420cb403a2SUlf Hansson return err; 11430cb403a2SUlf Hansson } 11440cb403a2SUlf Hansson 11450cb403a2SUlf Hansson /* 1146c4d770d7SUlf Hansson * Callback for runtime_suspend. 1147c4d770d7SUlf Hansson */ 1148c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1149c4d770d7SUlf Hansson { 1150c4d770d7SUlf Hansson int err; 1151c4d770d7SUlf Hansson 1152c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1153c4d770d7SUlf Hansson return 0; 1154c4d770d7SUlf Hansson 11550cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11560cc81a8cSUlf Hansson if (err) 1157f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 1158c4d770d7SUlf Hansson mmc_hostname(host), err); 1159c4d770d7SUlf Hansson 1160c4d770d7SUlf Hansson return err; 1161c4d770d7SUlf Hansson } 1162c4d770d7SUlf Hansson 1163c4d770d7SUlf Hansson /* 1164c4d770d7SUlf Hansson * Callback for runtime_resume. 1165c4d770d7SUlf Hansson */ 1166c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1167c4d770d7SUlf Hansson { 1168c4d770d7SUlf Hansson int err; 1169c4d770d7SUlf Hansson 11704d223782SUlf Hansson if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME))) 1171c4d770d7SUlf Hansson return 0; 1172c4d770d7SUlf Hansson 11730cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1174c4d770d7SUlf Hansson if (err) 1175f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive resume\n", 1176c4d770d7SUlf Hansson mmc_hostname(host), err); 1177c4d770d7SUlf Hansson 1178c4d770d7SUlf Hansson return 0; 1179c4d770d7SUlf Hansson } 1180c4d770d7SUlf Hansson 1181dc0ecfefSJohan Rudholm static int mmc_sd_reset(struct mmc_host *host) 1182dc0ecfefSJohan Rudholm { 1183dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr); 11843056c49cSUlf Hansson return mmc_sd_init_card(host, host->card->ocr, host->card); 1185dc0ecfefSJohan Rudholm } 1186dc0ecfefSJohan Rudholm 11879feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 11889feae246SAdrian Hunter .remove = mmc_sd_remove, 11899feae246SAdrian Hunter .detect = mmc_sd_detect, 1190c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1191c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 11929feae246SAdrian Hunter .suspend = mmc_sd_suspend, 11939feae246SAdrian Hunter .resume = mmc_sd_resume, 1194d3049504SAdrian Hunter .alive = mmc_sd_alive, 11955992e786SUlf Hansson .shutdown = mmc_sd_suspend, 1196dc0ecfefSJohan Rudholm .reset = mmc_sd_reset, 11979feae246SAdrian Hunter }; 11989feae246SAdrian Hunter 11997ea239d9SPierre Ossman /* 12007ea239d9SPierre Ossman * Starting point for SD card init. 12017ea239d9SPierre Ossman */ 1202807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 12037ea239d9SPierre Ossman { 12047ea239d9SPierre Ossman int err; 120569041150SUlf Hansson u32 ocr, rocr; 12067ea239d9SPierre Ossman 12077ea239d9SPierre Ossman BUG_ON(!host); 1208d84075c8SPierre Ossman WARN_ON(!host->claimed); 12097ea239d9SPierre Ossman 1210807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1211807e8e40SAndy Ross if (err) 1212807e8e40SAndy Ross return err; 1213807e8e40SAndy Ross 12142501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops); 12158f230f45STakashi Iwai if (host->ocr_avail_sd) 12168f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 12177ea239d9SPierre Ossman 121855556da0SPhilip Langdale /* 1219af517150SDavid Brownell * We need to get OCR a different way for SPI. 1220af517150SDavid Brownell */ 1221af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1222af517150SDavid Brownell mmc_go_idle(host); 1223af517150SDavid Brownell 1224af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1225af517150SDavid Brownell if (err) 1226af517150SDavid Brownell goto err; 1227af517150SDavid Brownell } 1228af517150SDavid Brownell 122969041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 12307ea239d9SPierre Ossman 12317ea239d9SPierre Ossman /* 12327ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 12337ea239d9SPierre Ossman */ 123469041150SUlf Hansson if (!rocr) { 1235109b5bedSPierre Ossman err = -EINVAL; 12367ea239d9SPierre Ossman goto err; 1237109b5bedSPierre Ossman } 12387ea239d9SPierre Ossman 12397ea239d9SPierre Ossman /* 12406abaa0c9SPierre Ossman * Detect and init the card. 12417ea239d9SPierre Ossman */ 124269041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 124317b0429dSPierre Ossman if (err) 12447ea239d9SPierre Ossman goto err; 12457ea239d9SPierre Ossman 12467ea239d9SPierre Ossman mmc_release_host(host); 12474101c16aSPierre Ossman err = mmc_add_card(host->card); 1248807e8e40SAndy Ross mmc_claim_host(host); 12497ea239d9SPierre Ossman if (err) 12502986d0bfSPierre Ossman goto remove_card; 12517ea239d9SPierre Ossman 12527ea239d9SPierre Ossman return 0; 12537ea239d9SPierre Ossman 12542986d0bfSPierre Ossman remove_card: 1255807e8e40SAndy Ross mmc_release_host(host); 12566abaa0c9SPierre Ossman mmc_remove_card(host->card); 12577ea239d9SPierre Ossman host->card = NULL; 12582986d0bfSPierre Ossman mmc_claim_host(host); 12597ea239d9SPierre Ossman err: 12607ea239d9SPierre Ossman mmc_detach_bus(host); 12617ea239d9SPierre Ossman 1262a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1263109b5bedSPierre Ossman mmc_hostname(host), err); 1264109b5bedSPierre Ossman 1265adf66a0dSPierre Ossman return err; 12667ea239d9SPierre Ossman } 1267