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 427ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 437ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 447ea239d9SPierre Ossman }; 457ea239d9SPierre Ossman 467ea239d9SPierre Ossman static const unsigned int tacc_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); 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; 228e85baa88SPaul Burton u32 *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 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]; 332d9812780SRussell King card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; 333013909c4SArindam Nath } 3347ea239d9SPierre Ossman 3351addfcdbSPierre Ossman out: 3361addfcdbSPierre Ossman kfree(status); 3371addfcdbSPierre Ossman 3381addfcdbSPierre Ossman return err; 3391addfcdbSPierre Ossman } 3401addfcdbSPierre Ossman 3411addfcdbSPierre Ossman /* 3421addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3431addfcdbSPierre Ossman */ 34471578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3451addfcdbSPierre Ossman { 3461addfcdbSPierre Ossman int err; 3471addfcdbSPierre Ossman u8 *status; 3481addfcdbSPierre Ossman 3493373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 35017b0429dSPierre Ossman return 0; 3513373c0aeSPierre Ossman 3523373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 35317b0429dSPierre Ossman return 0; 3543373c0aeSPierre Ossman 3551addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 35617b0429dSPierre Ossman return 0; 3571addfcdbSPierre Ossman 3581addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 35917b0429dSPierre Ossman return 0; 3601addfcdbSPierre Ossman 3611addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 3621addfcdbSPierre Ossman if (!status) { 363a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 364facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 36517b0429dSPierre Ossman return -ENOMEM; 3661addfcdbSPierre Ossman } 3671addfcdbSPierre Ossman 3687ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 36917b0429dSPierre Ossman if (err) 3707ea239d9SPierre Ossman goto out; 3717ea239d9SPierre Ossman 3727ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 3736606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n", 3747ea239d9SPierre Ossman mmc_hostname(card->host)); 37571578a1eSMichal Miroslaw err = 0; 3767ea239d9SPierre Ossman } else { 37771578a1eSMichal Miroslaw err = 1; 3787ea239d9SPierre Ossman } 3797ea239d9SPierre Ossman 3807ea239d9SPierre Ossman out: 3817ea239d9SPierre Ossman kfree(status); 3827ea239d9SPierre Ossman 3837ea239d9SPierre Ossman return err; 3847ea239d9SPierre Ossman } 3857ea239d9SPierre Ossman 386d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 387d6d50a15SArindam Nath { 388fa021cefSAdrian Hunter int card_drv_type, drive_strength, drv_type; 389d6d50a15SArindam Nath int err; 390d6d50a15SArindam Nath 3913853a042SAdrian Hunter card->drive_strength = 0; 3923853a042SAdrian Hunter 393fa021cefSAdrian Hunter card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; 394ca8e99b3SPhilip Rakity 395e23350b3SAdrian Hunter drive_strength = mmc_select_drive_strength(card, 396ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 397e23350b3SAdrian Hunter card_drv_type, &drv_type); 398ca8e99b3SPhilip Rakity 399b4f30a17SAdrian Hunter if (drive_strength) { 400ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 401d6d50a15SArindam Nath if (err) 402d6d50a15SArindam Nath return err; 403ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 4046606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n", 405d6d50a15SArindam Nath mmc_hostname(card->host)); 406d6d50a15SArindam Nath return 0; 407d6d50a15SArindam Nath } 4083853a042SAdrian Hunter card->drive_strength = drive_strength; 409b4f30a17SAdrian Hunter } 410d6d50a15SArindam Nath 411b4f30a17SAdrian Hunter if (drv_type) 412b4f30a17SAdrian Hunter mmc_set_driver_type(card->host, drv_type); 413d6d50a15SArindam Nath 414d6d50a15SArindam Nath return 0; 415d6d50a15SArindam Nath } 416d6d50a15SArindam Nath 41793c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 41849c468fcSArindam Nath { 41949c468fcSArindam Nath /* 42049c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 42149c468fcSArindam Nath * default speed. 42249c468fcSArindam Nath */ 4233f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 42493c712f9SSubhash Jadavani card->sd_bus_speed = 0; 42593c712f9SSubhash Jadavani return; 42693c712f9SSubhash Jadavani } 42749c468fcSArindam Nath 42849c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 42949c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 43093c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 43149c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 43249c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 43393c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 43449c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43549c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 43649c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 43793c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 43849c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 43949c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 44049c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 44193c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 44249c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 44349c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 44449c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 44549c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 44693c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 44793c712f9SSubhash Jadavani } 44849c468fcSArindam Nath } 44949c468fcSArindam Nath 45093c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 45193c712f9SSubhash Jadavani { 45293c712f9SSubhash Jadavani int err; 45393c712f9SSubhash Jadavani unsigned int timing = 0; 45493c712f9SSubhash Jadavani 45593c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 45693c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 45793c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 45893c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 45993c712f9SSubhash Jadavani break; 46093c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 46193c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 46293c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 46393c712f9SSubhash Jadavani break; 46493c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 46593c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 46693c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 46793c712f9SSubhash Jadavani break; 46893c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 46993c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 47093c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 47193c712f9SSubhash Jadavani break; 47293c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 47393c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 47493c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 47593c712f9SSubhash Jadavani break; 47693c712f9SSubhash Jadavani default: 47793c712f9SSubhash Jadavani return 0; 47893c712f9SSubhash Jadavani } 47993c712f9SSubhash Jadavani 48093c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 48149c468fcSArindam Nath if (err) 48249c468fcSArindam Nath return err; 48349c468fcSArindam Nath 48493c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 4856606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n", 48649c468fcSArindam Nath mmc_hostname(card->host)); 48749c468fcSArindam Nath else { 48849c468fcSArindam Nath mmc_set_timing(card->host, timing); 48949c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 49049c468fcSArindam Nath } 49149c468fcSArindam Nath 49249c468fcSArindam Nath return 0; 49349c468fcSArindam Nath } 49449c468fcSArindam Nath 49555c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 49655c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 49755c4665eSAaron Lu { 49855c4665eSAaron Lu u32 voltage, max_current; 49955c4665eSAaron Lu 50055c4665eSAaron Lu voltage = 1 << host->ios.vdd; 50155c4665eSAaron Lu switch (voltage) { 50255c4665eSAaron Lu case MMC_VDD_165_195: 50355c4665eSAaron Lu max_current = host->max_current_180; 50455c4665eSAaron Lu break; 50555c4665eSAaron Lu case MMC_VDD_29_30: 50655c4665eSAaron Lu case MMC_VDD_30_31: 50755c4665eSAaron Lu max_current = host->max_current_300; 50855c4665eSAaron Lu break; 50955c4665eSAaron Lu case MMC_VDD_32_33: 51055c4665eSAaron Lu case MMC_VDD_33_34: 51155c4665eSAaron Lu max_current = host->max_current_330; 51255c4665eSAaron Lu break; 51355c4665eSAaron Lu default: 51455c4665eSAaron Lu max_current = 0; 51555c4665eSAaron Lu } 51655c4665eSAaron Lu 51755c4665eSAaron Lu return max_current; 51855c4665eSAaron Lu } 51955c4665eSAaron Lu 5205371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5215371c927SArindam Nath { 5220aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5235371c927SArindam Nath int err; 52455c4665eSAaron Lu u32 max_current; 5255371c927SArindam Nath 5265371c927SArindam Nath /* 5275371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5280aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5290aa67700SPhilip Rakity * current limit. 53055c4665eSAaron Lu */ 53155c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 53255c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 53355c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 53455c4665eSAaron Lu return 0; 53555c4665eSAaron Lu 53655c4665eSAaron Lu /* 53755c4665eSAaron Lu * Host has different current capabilities when operating at 53855c4665eSAaron Lu * different voltages, so find out its max current first. 53955c4665eSAaron Lu */ 54055c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 54155c4665eSAaron Lu 54255c4665eSAaron Lu /* 543a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 544a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 545a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 546a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 547a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 548a39ca6aeSAaron Lu * maximum 300ma from the host. 549d9812780SRussell King * 550d9812780SRussell King * The above is incorrect: if we try to set a current limit that is 551d9812780SRussell King * not supported by the card, the card can rightfully error out the 552d9812780SRussell King * attempt, and remain at the default current limit. This results 553d9812780SRussell King * in a 300mA card being limited to 200mA even though the host 554d9812780SRussell King * supports 800mA. Failures seen with SanDisk 8GB UHS cards with 555d9812780SRussell King * an iMX6 host. --rmk 5565371c927SArindam Nath */ 557d9812780SRussell King if (max_current >= 800 && 558d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) 5595371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 560d9812780SRussell King else if (max_current >= 600 && 561d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) 5625371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 563d9812780SRussell King else if (max_current >= 400 && 564d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) 5655371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 566d9812780SRussell King else if (max_current >= 200 && 567d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) 5685371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5695371c927SArindam Nath 5700aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 5715371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5725371c927SArindam Nath if (err) 5735371c927SArindam Nath return err; 5745371c927SArindam Nath 5755371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 5766606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n", 5775371c927SArindam Nath mmc_hostname(card->host)); 5785371c927SArindam Nath 5790aa67700SPhilip Rakity } 580a39ca6aeSAaron Lu 5815371c927SArindam Nath return 0; 5825371c927SArindam Nath } 5835371c927SArindam Nath 584d6d50a15SArindam Nath /* 585d6d50a15SArindam Nath * UHS-I specific initialization procedure 586d6d50a15SArindam Nath */ 587d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 588d6d50a15SArindam Nath { 589d6d50a15SArindam Nath int err; 590d6d50a15SArindam Nath u8 *status; 591d6d50a15SArindam Nath 592d6d50a15SArindam Nath if (!card->scr.sda_spec3) 593d6d50a15SArindam Nath return 0; 594d6d50a15SArindam Nath 595d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 596d6d50a15SArindam Nath return 0; 597d6d50a15SArindam Nath 598d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 599d6d50a15SArindam Nath if (!status) { 600a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 601d6d50a15SArindam Nath "switch capabilities.\n", mmc_hostname(card->host)); 602d6d50a15SArindam Nath return -ENOMEM; 603d6d50a15SArindam Nath } 604d6d50a15SArindam Nath 605d6d50a15SArindam Nath /* Set 4-bit bus width */ 606d6d50a15SArindam Nath if ((card->host->caps & MMC_CAP_4_BIT_DATA) && 607d6d50a15SArindam Nath (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 608d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 609d6d50a15SArindam Nath if (err) 610d6d50a15SArindam Nath goto out; 611d6d50a15SArindam Nath 612d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 613d6d50a15SArindam Nath } 614d6d50a15SArindam Nath 61593c712f9SSubhash Jadavani /* 61693c712f9SSubhash Jadavani * Select the bus speed mode depending on host 61793c712f9SSubhash Jadavani * and card capability. 61893c712f9SSubhash Jadavani */ 61993c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 62093c712f9SSubhash Jadavani 621d6d50a15SArindam Nath /* Set the driver strength for the card */ 622d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 62349c468fcSArindam Nath if (err) 62449c468fcSArindam Nath goto out; 62549c468fcSArindam Nath 62693c712f9SSubhash Jadavani /* Set current limit for the card */ 62793c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6285371c927SArindam Nath if (err) 6295371c927SArindam Nath goto out; 6305371c927SArindam Nath 63193c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 63293c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 633b513ea25SArindam Nath if (err) 634b513ea25SArindam Nath goto out; 635b513ea25SArindam Nath 636810e08eeSFredrik Soderstedt /* 637810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 638810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 639810e08eeSFredrik Soderstedt */ 64063e415c6SAdrian Hunter if (!mmc_host_is_spi(card->host) && 641e10c3219SCarlo Caione (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || 642e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_DDR50 || 643e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { 64463e415c6SAdrian Hunter err = mmc_execute_tuning(card); 6454324f6deSWeijun Yang 6464324f6deSWeijun Yang /* 6474324f6deSWeijun Yang * As SD Specifications Part1 Physical Layer Specification 6484324f6deSWeijun Yang * Version 3.01 says, CMD19 tuning is available for unlocked 6494324f6deSWeijun Yang * cards in transfer state of 1.8V signaling mode. The small 6504324f6deSWeijun Yang * difference between v3.00 and 3.01 spec means that CMD19 6514324f6deSWeijun Yang * tuning is also available for DDR50 mode. 6524324f6deSWeijun Yang */ 653e10c3219SCarlo Caione if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { 6544324f6deSWeijun Yang pr_warn("%s: ddr50 tuning failed\n", 6554324f6deSWeijun Yang mmc_hostname(card->host)); 6564324f6deSWeijun Yang err = 0; 6574324f6deSWeijun Yang } 6584324f6deSWeijun Yang } 6594324f6deSWeijun Yang 660d6d50a15SArindam Nath out: 661d6d50a15SArindam Nath kfree(status); 662d6d50a15SArindam Nath 663d6d50a15SArindam Nath return err; 664d6d50a15SArindam Nath } 665d6d50a15SArindam Nath 66651ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 66751ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 66851ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 66951ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 67051ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 6715275a652SUri Yanai MMC_DEV_ATTR(ssr, 6725275a652SUri Yanai "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", 6735275a652SUri Yanai card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], 6745275a652SUri Yanai card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], 6755275a652SUri Yanai card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], 6765275a652SUri Yanai card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], 6775275a652SUri Yanai card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], 6785275a652SUri Yanai card->raw_ssr[15]); 67951ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 680dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 681dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 68251ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 68351ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 68451ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 68551ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 68651ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 68751ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 6885fb06af7SBojan Prtvar MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); 68951ec92e2SPierre Ossman 69051ec92e2SPierre Ossman 6916825a606SBojan Prtvar static ssize_t mmc_dsr_show(struct device *dev, 6926825a606SBojan Prtvar struct device_attribute *attr, 6936825a606SBojan Prtvar char *buf) 6946825a606SBojan Prtvar { 6956825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev); 6966825a606SBojan Prtvar struct mmc_host *host = card->host; 6976825a606SBojan Prtvar 6986825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req) 6996825a606SBojan Prtvar return sprintf(buf, "0x%x\n", host->dsr); 7006825a606SBojan Prtvar else 7016825a606SBojan Prtvar /* return default DSR value */ 7026825a606SBojan Prtvar return sprintf(buf, "0x%x\n", 0x404); 7036825a606SBojan Prtvar } 7046825a606SBojan Prtvar 7056825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 7066825a606SBojan Prtvar 70751ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 70851ec92e2SPierre Ossman &dev_attr_cid.attr, 70951ec92e2SPierre Ossman &dev_attr_csd.attr, 71051ec92e2SPierre Ossman &dev_attr_scr.attr, 7115275a652SUri Yanai &dev_attr_ssr.attr, 71251ec92e2SPierre Ossman &dev_attr_date.attr, 713dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 714dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 71551ec92e2SPierre Ossman &dev_attr_fwrev.attr, 71651ec92e2SPierre Ossman &dev_attr_hwrev.attr, 71751ec92e2SPierre Ossman &dev_attr_manfid.attr, 71851ec92e2SPierre Ossman &dev_attr_name.attr, 71951ec92e2SPierre Ossman &dev_attr_oemid.attr, 72051ec92e2SPierre Ossman &dev_attr_serial.attr, 7215fb06af7SBojan Prtvar &dev_attr_ocr.attr, 7226825a606SBojan Prtvar &dev_attr_dsr.attr, 72351ec92e2SPierre Ossman NULL, 72451ec92e2SPierre Ossman }; 725d1e58212SAxel Lin ATTRIBUTE_GROUPS(sd_std); 72651ec92e2SPierre Ossman 72771578a1eSMichal Miroslaw struct device_type sd_type = { 728d1e58212SAxel Lin .groups = sd_std_groups, 72951ec92e2SPierre Ossman }; 73051ec92e2SPierre Ossman 7317ea239d9SPierre Ossman /* 73271578a1eSMichal Miroslaw * Fetch CID from card. 7336abaa0c9SPierre Ossman */ 734d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 7356abaa0c9SPierre Ossman { 7366abaa0c9SPierre Ossman int err; 73755c4665eSAaron Lu u32 max_current; 7380797e5f1SJohan Rudholm int retries = 10; 73969041150SUlf Hansson u32 pocr = ocr; 7400797e5f1SJohan Rudholm 7410797e5f1SJohan Rudholm try_again: 7420797e5f1SJohan Rudholm if (!retries) { 7430797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 7446606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); 7450797e5f1SJohan Rudholm } 7466abaa0c9SPierre Ossman 7476abaa0c9SPierre Ossman /* 7486abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 7496abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 7506abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 7516abaa0c9SPierre Ossman * respond. 7526abaa0c9SPierre Ossman */ 7536abaa0c9SPierre Ossman mmc_go_idle(host); 7546abaa0c9SPierre Ossman 7556abaa0c9SPierre Ossman /* 7566abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 7576abaa0c9SPierre Ossman * compliant card and we should set bit 30 7586abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 7596abaa0c9SPierre Ossman * block-addressed SDHC cards. 7606abaa0c9SPierre Ossman */ 7616abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 76217b0429dSPierre Ossman if (!err) 763f2119df6SArindam Nath ocr |= SD_OCR_CCS; 7646abaa0c9SPierre Ossman 765f2119df6SArindam Nath /* 766f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 7670797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 7680797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 769f2119df6SArindam Nath */ 7700797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 771f2119df6SArindam Nath ocr |= SD_OCR_S18R; 772f2119df6SArindam Nath 77355c4665eSAaron Lu /* 77455c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 77555c4665eSAaron Lu * XPC should be set to 1. 77655c4665eSAaron Lu */ 77755c4665eSAaron Lu max_current = sd_get_host_max_current(host); 77855c4665eSAaron Lu if (max_current > 150) 779f2119df6SArindam Nath ocr |= SD_OCR_XPC; 780f2119df6SArindam Nath 781d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 78217b0429dSPierre Ossman if (err) 78371578a1eSMichal Miroslaw return err; 7846abaa0c9SPierre Ossman 785f2119df6SArindam Nath /* 786f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 787f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 788f2119df6SArindam Nath */ 789d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 790d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 7912ed573b6SUlf Hansson err = mmc_set_uhs_voltage(host, pocr); 7920797e5f1SJohan Rudholm if (err == -EAGAIN) { 7930797e5f1SJohan Rudholm retries--; 7940797e5f1SJohan Rudholm goto try_again; 7950797e5f1SJohan Rudholm } else if (err) { 7960797e5f1SJohan Rudholm retries = 0; 797f2119df6SArindam Nath goto try_again; 798f2119df6SArindam Nath } 799f2119df6SArindam Nath } 800f2119df6SArindam Nath 801af517150SDavid Brownell if (mmc_host_is_spi(host)) 802af517150SDavid Brownell err = mmc_send_cid(host, cid); 803af517150SDavid Brownell else 8046abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 8056abaa0c9SPierre Ossman 80671578a1eSMichal Miroslaw return err; 807adf66a0dSPierre Ossman } 8086abaa0c9SPierre Ossman 80971578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 81071578a1eSMichal Miroslaw { 81171578a1eSMichal Miroslaw int err; 8126abaa0c9SPierre Ossman 8136abaa0c9SPierre Ossman /* 8146abaa0c9SPierre Ossman * Fetch CSD from card. 8156abaa0c9SPierre Ossman */ 8166abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 81717b0429dSPierre Ossman if (err) 81871578a1eSMichal Miroslaw return err; 8196abaa0c9SPierre Ossman 820bd766312SPierre Ossman err = mmc_decode_csd(card); 821adf66a0dSPierre Ossman if (err) 82271578a1eSMichal Miroslaw return err; 823bd766312SPierre Ossman 82471578a1eSMichal Miroslaw return 0; 8256abaa0c9SPierre Ossman } 8266abaa0c9SPierre Ossman 8279f6e0bffSLars-Peter Clausen static int mmc_sd_get_ro(struct mmc_host *host) 8289f6e0bffSLars-Peter Clausen { 8299f6e0bffSLars-Peter Clausen int ro; 8309f6e0bffSLars-Peter Clausen 8319f6e0bffSLars-Peter Clausen /* 8329f6e0bffSLars-Peter Clausen * Some systems don't feature a write-protect pin and don't need one. 8339f6e0bffSLars-Peter Clausen * E.g. because they only have micro-SD card slot. For those systems 8349f6e0bffSLars-Peter Clausen * assume that the SD card is always read-write. 8359f6e0bffSLars-Peter Clausen */ 8369f6e0bffSLars-Peter Clausen if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) 8379f6e0bffSLars-Peter Clausen return 0; 8389f6e0bffSLars-Peter Clausen 8399f6e0bffSLars-Peter Clausen if (!host->ops->get_ro) 8409f6e0bffSLars-Peter Clausen return -1; 8419f6e0bffSLars-Peter Clausen 8429f6e0bffSLars-Peter Clausen ro = host->ops->get_ro(host); 8439f6e0bffSLars-Peter Clausen 8449f6e0bffSLars-Peter Clausen return ro; 8459f6e0bffSLars-Peter Clausen } 8469f6e0bffSLars-Peter Clausen 84771578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 84871578a1eSMichal Miroslaw bool reinit) 84971578a1eSMichal Miroslaw { 85071578a1eSMichal Miroslaw int err; 8516abaa0c9SPierre Ossman 85271578a1eSMichal Miroslaw if (!reinit) { 8536abaa0c9SPierre Ossman /* 8546abaa0c9SPierre Ossman * Fetch SCR from card. 8556abaa0c9SPierre Ossman */ 8566abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 85717b0429dSPierre Ossman if (err) 85871578a1eSMichal Miroslaw return err; 8596abaa0c9SPierre Ossman 860bd766312SPierre Ossman err = mmc_decode_scr(card); 86171578a1eSMichal Miroslaw if (err) 86271578a1eSMichal Miroslaw return err; 8636abaa0c9SPierre Ossman 8646abaa0c9SPierre Ossman /* 865dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 866dfe86cbaSAdrian Hunter */ 867dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 868dfe86cbaSAdrian Hunter if (err) 869dfe86cbaSAdrian Hunter return err; 870dfe86cbaSAdrian Hunter 871dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 872dfe86cbaSAdrian Hunter mmc_init_erase(card); 873dfe86cbaSAdrian Hunter 874dfe86cbaSAdrian Hunter /* 8756abaa0c9SPierre Ossman * Fetch switch information from card. 8766abaa0c9SPierre Ossman */ 8776abaa0c9SPierre Ossman err = mmc_read_switch(card); 87817b0429dSPierre Ossman if (err) 87971578a1eSMichal Miroslaw return err; 8806abaa0c9SPierre Ossman } 8816abaa0c9SPierre Ossman 8826abaa0c9SPierre Ossman /* 8839d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 8849d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 8859d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 8869d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 8879d9f25c0SWolfgang Muees */ 8889d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 8899d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 8909d9f25c0SWolfgang Muees if (err) 89171578a1eSMichal Miroslaw return err; 8929d9f25c0SWolfgang Muees } 8939d9f25c0SWolfgang Muees 8949d9f25c0SWolfgang Muees /* 89571578a1eSMichal Miroslaw * Check if read-only switch is active. 8966abaa0c9SPierre Ossman */ 89771578a1eSMichal Miroslaw if (!reinit) { 8989f6e0bffSLars-Peter Clausen int ro = mmc_sd_get_ro(host); 89971578a1eSMichal Miroslaw 90071578a1eSMichal Miroslaw if (ro < 0) { 9016606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", 90271578a1eSMichal Miroslaw mmc_hostname(host)); 90371578a1eSMichal Miroslaw } else if (ro > 0) { 90471578a1eSMichal Miroslaw mmc_card_set_readonly(card); 90571578a1eSMichal Miroslaw } 90671578a1eSMichal Miroslaw } 90771578a1eSMichal Miroslaw 90871578a1eSMichal Miroslaw return 0; 90971578a1eSMichal Miroslaw } 91071578a1eSMichal Miroslaw 91171578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 91271578a1eSMichal Miroslaw { 91371578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 9146abaa0c9SPierre Ossman 915cdc99179SSeungwon Jeon if (mmc_card_hs(card)) { 9166abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 9176abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 9186abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 9196abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 9206abaa0c9SPierre Ossman } 9216abaa0c9SPierre Ossman 92271578a1eSMichal Miroslaw return max_dtr; 92371578a1eSMichal Miroslaw } 92471578a1eSMichal Miroslaw 92571578a1eSMichal Miroslaw /* 92671578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 92771578a1eSMichal Miroslaw * 92871578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 92971578a1eSMichal Miroslaw * we're trying to reinitialise. 93071578a1eSMichal Miroslaw */ 93171578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 93271578a1eSMichal Miroslaw struct mmc_card *oldcard) 93371578a1eSMichal Miroslaw { 93471578a1eSMichal Miroslaw struct mmc_card *card; 93571578a1eSMichal Miroslaw int err; 93671578a1eSMichal Miroslaw u32 cid[4]; 937d6d50a15SArindam Nath u32 rocr = 0; 93871578a1eSMichal Miroslaw 93971578a1eSMichal Miroslaw WARN_ON(!host->claimed); 94071578a1eSMichal Miroslaw 941d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 94271578a1eSMichal Miroslaw if (err) 94371578a1eSMichal Miroslaw return err; 94471578a1eSMichal Miroslaw 94571578a1eSMichal Miroslaw if (oldcard) { 94671578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 94771578a1eSMichal Miroslaw return -ENOENT; 94871578a1eSMichal Miroslaw 94971578a1eSMichal Miroslaw card = oldcard; 95071578a1eSMichal Miroslaw } else { 95171578a1eSMichal Miroslaw /* 95271578a1eSMichal Miroslaw * Allocate card structure. 95371578a1eSMichal Miroslaw */ 95471578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 95571578a1eSMichal Miroslaw if (IS_ERR(card)) 95671578a1eSMichal Miroslaw return PTR_ERR(card); 95771578a1eSMichal Miroslaw 95869041150SUlf Hansson card->ocr = ocr; 95971578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 96071578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 96171578a1eSMichal Miroslaw } 96271578a1eSMichal Miroslaw 96371578a1eSMichal Miroslaw /* 964eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 965eac86321SDoug Anderson */ 966eac86321SDoug Anderson if (host->ops->init_card) 967eac86321SDoug Anderson host->ops->init_card(host, card); 968eac86321SDoug Anderson 969eac86321SDoug Anderson /* 97071578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 97171578a1eSMichal Miroslaw */ 97271578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 97371578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 97471578a1eSMichal Miroslaw if (err) 9757fca9675SWei WANG goto free_card; 97671578a1eSMichal Miroslaw } 97771578a1eSMichal Miroslaw 97871578a1eSMichal Miroslaw if (!oldcard) { 97971578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 98071578a1eSMichal Miroslaw if (err) 9817fca9675SWei WANG goto free_card; 98271578a1eSMichal Miroslaw 98371578a1eSMichal Miroslaw mmc_decode_cid(card); 98471578a1eSMichal Miroslaw } 98571578a1eSMichal Miroslaw 98671578a1eSMichal Miroslaw /* 9873d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 9883d705d14SSascha Hauer * DSR configuration 9893d705d14SSascha Hauer */ 9903d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 9913d705d14SSascha Hauer mmc_set_dsr(host); 9923d705d14SSascha Hauer 9933d705d14SSascha Hauer /* 99471578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 99571578a1eSMichal Miroslaw */ 99671578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 99771578a1eSMichal Miroslaw err = mmc_select_card(card); 99871578a1eSMichal Miroslaw if (err) 9997fca9675SWei WANG goto free_card; 100071578a1eSMichal Miroslaw } 100171578a1eSMichal Miroslaw 100271578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 100371578a1eSMichal Miroslaw if (err) 100471578a1eSMichal Miroslaw goto free_card; 100571578a1eSMichal Miroslaw 1006d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 1007d6d50a15SArindam Nath if (rocr & SD_ROCR_S18A) { 1008d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 1009d6d50a15SArindam Nath if (err) 1010d6d50a15SArindam Nath goto free_card; 1011d6d50a15SArindam Nath } else { 101271578a1eSMichal Miroslaw /* 101371578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 101471578a1eSMichal Miroslaw */ 101571578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 101671578a1eSMichal Miroslaw if (err > 0) 1017cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS); 101871578a1eSMichal Miroslaw else if (err) 101971578a1eSMichal Miroslaw goto free_card; 102071578a1eSMichal Miroslaw 102171578a1eSMichal Miroslaw /* 102271578a1eSMichal Miroslaw * Set bus speed. 102371578a1eSMichal Miroslaw */ 102471578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 10256abaa0c9SPierre Ossman 10266abaa0c9SPierre Ossman /* 10276abaa0c9SPierre Ossman * Switch to wider bus (if supported). 10286abaa0c9SPierre Ossman */ 102971651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 10306abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 10316abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 103217b0429dSPierre Ossman if (err) 10336abaa0c9SPierre Ossman goto free_card; 10346abaa0c9SPierre Ossman 10356abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 10366abaa0c9SPierre Ossman } 1037d6d50a15SArindam Nath } 10386abaa0c9SPierre Ossman 10396abaa0c9SPierre Ossman host->card = card; 104017b0429dSPierre Ossman return 0; 10416abaa0c9SPierre Ossman 10426abaa0c9SPierre Ossman free_card: 10436abaa0c9SPierre Ossman if (!oldcard) 10446abaa0c9SPierre Ossman mmc_remove_card(card); 10456abaa0c9SPierre Ossman 1046adf66a0dSPierre Ossman return err; 10476abaa0c9SPierre Ossman } 10486abaa0c9SPierre Ossman 10496abaa0c9SPierre Ossman /* 10507ea239d9SPierre Ossman * Host is being removed. Free up the current card. 10517ea239d9SPierre Ossman */ 10527ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 10537ea239d9SPierre Ossman { 10547ea239d9SPierre Ossman mmc_remove_card(host->card); 10557ea239d9SPierre Ossman host->card = NULL; 10567ea239d9SPierre Ossman } 10577ea239d9SPierre Ossman 10587ea239d9SPierre Ossman /* 1059d3049504SAdrian Hunter * Card detection - card is alive. 1060d3049504SAdrian Hunter */ 1061d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1062d3049504SAdrian Hunter { 1063d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1064d3049504SAdrian Hunter } 1065d3049504SAdrian Hunter 1066d3049504SAdrian Hunter /* 10677ea239d9SPierre Ossman * Card detection callback from host. 10687ea239d9SPierre Ossman */ 10697ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 10707ea239d9SPierre Ossman { 10717ea239d9SPierre Ossman int err; 10727ea239d9SPierre Ossman 1073e94cfef6SUlf Hansson mmc_get_card(host->card); 10747ea239d9SPierre Ossman 10757ea239d9SPierre Ossman /* 10767ea239d9SPierre Ossman * Just check if our card has been removed. 10777ea239d9SPierre Ossman */ 1078d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 10797ea239d9SPierre Ossman 1080e94cfef6SUlf Hansson mmc_put_card(host->card); 10817ea239d9SPierre Ossman 108217b0429dSPierre Ossman if (err) { 10834101c16aSPierre Ossman mmc_sd_remove(host); 10847ea239d9SPierre Ossman 10857ea239d9SPierre Ossman mmc_claim_host(host); 10867ea239d9SPierre Ossman mmc_detach_bus(host); 10877f7e4129SUlf Hansson mmc_power_off(host); 10887ea239d9SPierre Ossman mmc_release_host(host); 10897ea239d9SPierre Ossman } 10907ea239d9SPierre Ossman } 10917ea239d9SPierre Ossman 10920cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 10936abaa0c9SPierre Ossman { 109485e727edSJaehoon Chung int err = 0; 109585e727edSJaehoon Chung 10966abaa0c9SPierre Ossman mmc_claim_host(host); 10979ec775f7SUlf Hansson 10989ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 10999ec775f7SUlf Hansson goto out; 11009ec775f7SUlf Hansson 1101af517150SDavid Brownell if (!mmc_host_is_spi(host)) 110285e727edSJaehoon Chung err = mmc_deselect_cards(host); 1103cdc99179SSeungwon Jeon 11049ec775f7SUlf Hansson if (!err) { 110574590263SUlf Hansson mmc_power_off(host); 11069ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 11079ec775f7SUlf Hansson } 110895cdfb72SNicolas Pitre 11099ec775f7SUlf Hansson out: 11109ec775f7SUlf Hansson mmc_release_host(host); 111185e727edSJaehoon Chung return err; 11126abaa0c9SPierre Ossman } 11136abaa0c9SPierre Ossman 11146abaa0c9SPierre Ossman /* 11150cb403a2SUlf Hansson * Callback for suspend 11160cb403a2SUlf Hansson */ 11170cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 11180cb403a2SUlf Hansson { 11190cb403a2SUlf Hansson int err; 11200cb403a2SUlf Hansson 11210cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11220cb403a2SUlf Hansson if (!err) { 11230cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 11240cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 11250cb403a2SUlf Hansson } 11260cb403a2SUlf Hansson 11270cb403a2SUlf Hansson return err; 11280cb403a2SUlf Hansson } 11290cb403a2SUlf Hansson 11300cb403a2SUlf Hansson /* 11316abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11326abaa0c9SPierre Ossman * and, if so, restore all state to it. 11336abaa0c9SPierre Ossman */ 11340cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 11356abaa0c9SPierre Ossman { 11369ec775f7SUlf Hansson int err = 0; 11376abaa0c9SPierre Ossman 11386abaa0c9SPierre Ossman mmc_claim_host(host); 11399ec775f7SUlf Hansson 11409ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 11419ec775f7SUlf Hansson goto out; 11429ec775f7SUlf Hansson 114369041150SUlf Hansson mmc_power_up(host, host->card->ocr); 114469041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 11459ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 11462986d0bfSPierre Ossman 11479ec775f7SUlf Hansson out: 11489ec775f7SUlf Hansson mmc_release_host(host); 114995cdfb72SNicolas Pitre return err; 11506abaa0c9SPierre Ossman } 11516abaa0c9SPierre Ossman 1152c4d770d7SUlf Hansson /* 11530cb403a2SUlf Hansson * Callback for resume 11540cb403a2SUlf Hansson */ 11550cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 11560cb403a2SUlf Hansson { 11570cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 1158c29536e8SUlf Hansson return 0; 11590cb403a2SUlf Hansson } 11600cb403a2SUlf Hansson 11610cb403a2SUlf Hansson /* 1162c4d770d7SUlf Hansson * Callback for runtime_suspend. 1163c4d770d7SUlf Hansson */ 1164c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1165c4d770d7SUlf Hansson { 1166c4d770d7SUlf Hansson int err; 1167c4d770d7SUlf Hansson 1168c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1169c4d770d7SUlf Hansson return 0; 1170c4d770d7SUlf Hansson 11710cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11720cc81a8cSUlf Hansson if (err) 1173f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 1174c4d770d7SUlf Hansson mmc_hostname(host), err); 1175c4d770d7SUlf Hansson 1176c4d770d7SUlf Hansson return err; 1177c4d770d7SUlf Hansson } 1178c4d770d7SUlf Hansson 1179c4d770d7SUlf Hansson /* 1180c4d770d7SUlf Hansson * Callback for runtime_resume. 1181c4d770d7SUlf Hansson */ 1182c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1183c4d770d7SUlf Hansson { 1184c4d770d7SUlf Hansson int err; 1185c4d770d7SUlf Hansson 11860cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1187520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 1188c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 1189c4d770d7SUlf Hansson mmc_hostname(host), err); 1190c4d770d7SUlf Hansson 1191c4d770d7SUlf Hansson return 0; 1192c4d770d7SUlf Hansson } 1193c4d770d7SUlf Hansson 1194dc0ecfefSJohan Rudholm static int mmc_sd_reset(struct mmc_host *host) 1195dc0ecfefSJohan Rudholm { 1196dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr); 11973056c49cSUlf Hansson return mmc_sd_init_card(host, host->card->ocr, host->card); 1198dc0ecfefSJohan Rudholm } 1199dc0ecfefSJohan Rudholm 12009feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 12019feae246SAdrian Hunter .remove = mmc_sd_remove, 12029feae246SAdrian Hunter .detect = mmc_sd_detect, 1203c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1204c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 12059feae246SAdrian Hunter .suspend = mmc_sd_suspend, 12069feae246SAdrian Hunter .resume = mmc_sd_resume, 1207d3049504SAdrian Hunter .alive = mmc_sd_alive, 12085992e786SUlf Hansson .shutdown = mmc_sd_suspend, 1209dc0ecfefSJohan Rudholm .reset = mmc_sd_reset, 12109feae246SAdrian Hunter }; 12119feae246SAdrian Hunter 12127ea239d9SPierre Ossman /* 12137ea239d9SPierre Ossman * Starting point for SD card init. 12147ea239d9SPierre Ossman */ 1215807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 12167ea239d9SPierre Ossman { 12177ea239d9SPierre Ossman int err; 121869041150SUlf Hansson u32 ocr, rocr; 12197ea239d9SPierre Ossman 1220d84075c8SPierre Ossman WARN_ON(!host->claimed); 12217ea239d9SPierre Ossman 1222807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1223807e8e40SAndy Ross if (err) 1224807e8e40SAndy Ross return err; 1225807e8e40SAndy Ross 12262501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops); 12278f230f45STakashi Iwai if (host->ocr_avail_sd) 12288f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 12297ea239d9SPierre Ossman 123055556da0SPhilip Langdale /* 1231af517150SDavid Brownell * We need to get OCR a different way for SPI. 1232af517150SDavid Brownell */ 1233af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1234af517150SDavid Brownell mmc_go_idle(host); 1235af517150SDavid Brownell 1236af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1237af517150SDavid Brownell if (err) 1238af517150SDavid Brownell goto err; 1239af517150SDavid Brownell } 1240af517150SDavid Brownell 124169041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 12427ea239d9SPierre Ossman 12437ea239d9SPierre Ossman /* 12447ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 12457ea239d9SPierre Ossman */ 124669041150SUlf Hansson if (!rocr) { 1247109b5bedSPierre Ossman err = -EINVAL; 12487ea239d9SPierre Ossman goto err; 1249109b5bedSPierre Ossman } 12507ea239d9SPierre Ossman 12517ea239d9SPierre Ossman /* 12526abaa0c9SPierre Ossman * Detect and init the card. 12537ea239d9SPierre Ossman */ 125469041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 125517b0429dSPierre Ossman if (err) 12567ea239d9SPierre Ossman goto err; 12577ea239d9SPierre Ossman 12587ea239d9SPierre Ossman mmc_release_host(host); 12594101c16aSPierre Ossman err = mmc_add_card(host->card); 12607ea239d9SPierre Ossman if (err) 12612986d0bfSPierre Ossman goto remove_card; 12627ea239d9SPierre Ossman 12632860d060SSergei Shtylyov mmc_claim_host(host); 12647ea239d9SPierre Ossman return 0; 12657ea239d9SPierre Ossman 12662986d0bfSPierre Ossman remove_card: 12676abaa0c9SPierre Ossman mmc_remove_card(host->card); 12687ea239d9SPierre Ossman host->card = NULL; 12692986d0bfSPierre Ossman mmc_claim_host(host); 12707ea239d9SPierre Ossman err: 12717ea239d9SPierre Ossman mmc_detach_bus(host); 12727ea239d9SPierre Ossman 1273a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1274109b5bedSPierre Ossman mmc_hostname(host), err); 1275109b5bedSPierre Ossman 1276adf66a0dSPierre Ossman return err; 12777ea239d9SPierre Ossman } 1278