1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 27ea239d9SPierre Ossman /* 370f10482SPierre Ossman * linux/drivers/mmc/core/sd.c 47ea239d9SPierre Ossman * 57ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 67ea239d9SPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 77ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 87ea239d9SPierre Ossman */ 97ea239d9SPierre Ossman 107ea239d9SPierre Ossman #include <linux/err.h> 119288cac0SWolfram Sang #include <linux/sizes.h> 125a0e3ad6STejun Heo #include <linux/slab.h> 130205a904SPaul Gortmaker #include <linux/stat.h> 140cb403a2SUlf Hansson #include <linux/pm_runtime.h> 15*ac9d2555SLinus Walleij #include <linux/random.h> 1624b83debSChristoph Hellwig #include <linux/scatterlist.h> 17f5d8a5feSSergey Shtylyov #include <linux/sysfs.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include <linux/mmc/host.h> 207ea239d9SPierre Ossman #include <linux/mmc/card.h> 217ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 223373c0aeSPierre Ossman #include <linux/mmc/sd.h> 237ea239d9SPierre Ossman 247ea239d9SPierre Ossman #include "core.h" 254facdde1SUlf Hansson #include "card.h" 265857b29bSUlf Hansson #include "host.h" 274101c16aSPierre Ossman #include "bus.h" 287ea239d9SPierre Ossman #include "mmc_ops.h" 29ce101496SMark Brown #include "sd.h" 307ea239d9SPierre Ossman #include "sd_ops.h" 317ea239d9SPierre Ossman 327ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 337ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 347ea239d9SPierre Ossman 0, 0, 0, 0 357ea239d9SPierre Ossman }; 367ea239d9SPierre Ossman 377ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 387ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 397ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 407ea239d9SPierre Ossman }; 417ea239d9SPierre Ossman 424406ae21SShawn Lin static const unsigned int taac_exp[] = { 437ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 447ea239d9SPierre Ossman }; 457ea239d9SPierre Ossman 464406ae21SShawn Lin static const unsigned int taac_mant[] = { 477ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 487ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 497ea239d9SPierre Ossman }; 507ea239d9SPierre Ossman 519288cac0SWolfram Sang static const unsigned int sd_au_size[] = { 529288cac0SWolfram Sang 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, 539288cac0SWolfram Sang SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, 549288cac0SWolfram Sang SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, 559288cac0SWolfram Sang SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, 569288cac0SWolfram Sang }; 579288cac0SWolfram Sang 587ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 597ea239d9SPierre Ossman ({ \ 607ea239d9SPierre Ossman const int __size = size; \ 617ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 627ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 637ea239d9SPierre Ossman const int __shft = (start) & 31; \ 647ea239d9SPierre Ossman u32 __res; \ 657ea239d9SPierre Ossman \ 667ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 677ea239d9SPierre Ossman if (__size + __shft > 32) \ 687ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 697ea239d9SPierre Ossman __res & __mask; \ 707ea239d9SPierre Ossman }) 717ea239d9SPierre Ossman 72379f56c2SAndrey Skvortsov #define SD_POWEROFF_NOTIFY_TIMEOUT_MS 1000 73130206a6SUlf Hansson #define SD_WRITE_EXTR_SINGLE_TIMEOUT_MS 1000 742c5d4276SUlf Hansson 752c5d4276SUlf Hansson struct sd_busy_data { 762c5d4276SUlf Hansson struct mmc_card *card; 772c5d4276SUlf Hansson u8 *reg_buf; 782c5d4276SUlf Hansson }; 792c5d4276SUlf Hansson 807ea239d9SPierre Ossman /* 817ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 827ea239d9SPierre Ossman */ 8371578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 847ea239d9SPierre Ossman { 857ea239d9SPierre Ossman u32 *resp = card->raw_cid; 867ea239d9SPierre Ossman 877ea239d9SPierre Ossman /* 88*ac9d2555SLinus Walleij * Add the raw card ID (cid) data to the entropy pool. It doesn't 89*ac9d2555SLinus Walleij * matter that not all of it is unique, it's just bonus entropy. 90*ac9d2555SLinus Walleij */ 91*ac9d2555SLinus Walleij add_device_randomness(&card->raw_cid, sizeof(card->raw_cid)); 92*ac9d2555SLinus Walleij 93*ac9d2555SLinus Walleij /* 947ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 957ea239d9SPierre Ossman * have to assume we can parse this. 967ea239d9SPierre Ossman */ 977ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 987ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 997ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 1007ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 1017ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 1027ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 1037ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 1047ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 1057ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 1067ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 1077ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 1087ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 1097ea239d9SPierre Ossman 1107ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 1117ea239d9SPierre Ossman } 1127ea239d9SPierre Ossman 1137ea239d9SPierre Ossman /* 1147ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1157ea239d9SPierre Ossman */ 116bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1177ea239d9SPierre Ossman { 1187ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1197ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1207ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1217ea239d9SPierre Ossman 1227ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1237ea239d9SPierre Ossman 1247ea239d9SPierre Ossman switch (csd_struct) { 1257ea239d9SPierre Ossman case 0: 1267ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1277ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1284406ae21SShawn Lin csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; 1294406ae21SShawn Lin csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1307ea239d9SPierre Ossman 1317ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1327ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1337ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1347ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1357ea239d9SPierre Ossman 1367ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1377ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1387ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1397ea239d9SPierre Ossman 1407ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1417ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1427ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1437ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1443d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1457ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1467ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1477ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 148dfe86cbaSAdrian Hunter 149dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 150dfe86cbaSAdrian Hunter csd->erase_size = 1; 151dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) { 152dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 153dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 154dfe86cbaSAdrian Hunter } 155917a5336SSeunghui Lee 156917a5336SSeunghui Lee if (UNSTUFF_BITS(resp, 13, 1)) 157917a5336SSeunghui Lee mmc_card_set_readonly(card); 1587ea239d9SPierre Ossman break; 1597ea239d9SPierre Ossman case 1: 1607ea239d9SPierre Ossman /* 1613a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most 1627ea239d9SPierre Ossman * interesting fields are unused and have fixed 1637ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1647ea239d9SPierre Ossman * we assume those fixed values ourselves. 1657ea239d9SPierre Ossman */ 1667ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1677ea239d9SPierre Ossman 1684406ae21SShawn Lin csd->taac_ns = 0; /* Unused */ 1694406ae21SShawn Lin csd->taac_clks = 0; /* Unused */ 1707ea239d9SPierre Ossman 1717ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1727ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1737ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1747ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1753a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22); 1763a303511SArindam Nath 1773a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ 1783a303511SArindam Nath if (csd->c_size >= 0xFFFF) 1793a303511SArindam Nath mmc_card_set_ext_capacity(card); 1807ea239d9SPierre Ossman 1817ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1827ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1837ea239d9SPierre Ossman 1847ea239d9SPierre Ossman csd->read_blkbits = 9; 1857ea239d9SPierre Ossman csd->read_partial = 0; 1867ea239d9SPierre Ossman csd->write_misalign = 0; 1877ea239d9SPierre Ossman csd->read_misalign = 0; 1887ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1897ea239d9SPierre Ossman csd->write_blkbits = 9; 1907ea239d9SPierre Ossman csd->write_partial = 0; 191dfe86cbaSAdrian Hunter csd->erase_size = 1; 192917a5336SSeunghui Lee 193917a5336SSeunghui Lee if (UNSTUFF_BITS(resp, 13, 1)) 194917a5336SSeunghui Lee mmc_card_set_readonly(card); 1957ea239d9SPierre Ossman break; 1967ea239d9SPierre Ossman default: 197a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1987ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 199bd766312SPierre Ossman return -EINVAL; 2007ea239d9SPierre Ossman } 201bd766312SPierre Ossman 202dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size; 203dfe86cbaSAdrian Hunter 204bd766312SPierre Ossman return 0; 2057ea239d9SPierre Ossman } 2067ea239d9SPierre Ossman 2077ea239d9SPierre Ossman /* 2087ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 2097ea239d9SPierre Ossman */ 210bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 2117ea239d9SPierre Ossman { 2127ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 2137ea239d9SPierre Ossman unsigned int scr_struct; 2147ea239d9SPierre Ossman u32 resp[4]; 2157ea239d9SPierre Ossman 2167ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 2177ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 2187ea239d9SPierre Ossman 2197ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 2207ea239d9SPierre Ossman if (scr_struct != 0) { 221a3c76eb9SGirish K S pr_err("%s: unrecognised SCR structure version %d\n", 2227ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 223bd766312SPierre Ossman return -EINVAL; 2247ea239d9SPierre Ossman } 2257ea239d9SPierre Ossman 2267ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 2277ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 228013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2) 229013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */ 230013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); 231bd766312SPierre Ossman 23268539e2bSAvri Altman if (scr->sda_spec3) { 23368539e2bSAvri Altman scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1); 23468539e2bSAvri Altman scr->sda_specx = UNSTUFF_BITS(resp, 38, 4); 23568539e2bSAvri Altman } 23668539e2bSAvri Altman 237dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 238dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 239dfe86cbaSAdrian Hunter else 240dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 241dfe86cbaSAdrian Hunter 242dbea8ae9SUlf Hansson if (scr->sda_spec4) 243dbea8ae9SUlf Hansson scr->cmds = UNSTUFF_BITS(resp, 32, 4); 244dbea8ae9SUlf Hansson else if (scr->sda_spec3) 245f0d89972SAndrei Warkentin scr->cmds = UNSTUFF_BITS(resp, 32, 2); 2469e4be8d0SRaul E Rangel 2479e4be8d0SRaul E Rangel /* SD Spec says: any SD Card shall set at least bits 0 and 2 */ 2489e4be8d0SRaul E Rangel if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) || 2499e4be8d0SRaul E Rangel !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) { 2509e4be8d0SRaul E Rangel pr_err("%s: invalid bus width\n", mmc_hostname(card->host)); 2519e4be8d0SRaul E Rangel return -EINVAL; 2529e4be8d0SRaul E Rangel } 2539e4be8d0SRaul E Rangel 254bd766312SPierre Ossman return 0; 2557ea239d9SPierre Ossman } 2567ea239d9SPierre Ossman 2577ea239d9SPierre Ossman /* 258dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 259dfe86cbaSAdrian Hunter */ 260dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card) 261dfe86cbaSAdrian Hunter { 262dfe86cbaSAdrian Hunter unsigned int au, es, et, eo; 26306c9ccb7SWinkler, Tomas __be32 *raw_ssr; 264bc47e2f6SAvri Altman u32 resp[4] = {}; 265bc47e2f6SAvri Altman u8 discard_support; 2665275a652SUri Yanai int i; 267dfe86cbaSAdrian Hunter 268dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 2696606110dSJoe Perches pr_warn("%s: card lacks mandatory SD Status function\n", 2706606110dSJoe Perches mmc_hostname(card->host)); 271dfe86cbaSAdrian Hunter return 0; 272dfe86cbaSAdrian Hunter } 273dfe86cbaSAdrian Hunter 274e85baa88SPaul Burton raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL); 275e85baa88SPaul Burton if (!raw_ssr) 276e85baa88SPaul Burton return -ENOMEM; 277e85baa88SPaul Burton 278e85baa88SPaul Burton if (mmc_app_sd_status(card, raw_ssr)) { 2796606110dSJoe Perches pr_warn("%s: problem reading SD Status register\n", 2806606110dSJoe Perches mmc_hostname(card->host)); 281e85baa88SPaul Burton kfree(raw_ssr); 2825275a652SUri Yanai return 0; 283dfe86cbaSAdrian Hunter } 284dfe86cbaSAdrian Hunter 285dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 286e85baa88SPaul Burton card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]); 287e85baa88SPaul Burton 288e85baa88SPaul Burton kfree(raw_ssr); 289dfe86cbaSAdrian Hunter 290dfe86cbaSAdrian Hunter /* 291dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 292dfe86cbaSAdrian Hunter * bitfield positions accordingly. 293dfe86cbaSAdrian Hunter */ 2945275a652SUri Yanai au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4); 2959288cac0SWolfram Sang if (au) { 2969288cac0SWolfram Sang if (au <= 9 || card->scr.sda_spec3) { 2979288cac0SWolfram Sang card->ssr.au = sd_au_size[au]; 2985275a652SUri Yanai es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16); 2995275a652SUri Yanai et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6); 300dfe86cbaSAdrian Hunter if (es && et) { 3015275a652SUri Yanai eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2); 302dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 303dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 304dfe86cbaSAdrian Hunter } 305dfe86cbaSAdrian Hunter } else { 3066606110dSJoe Perches pr_warn("%s: SD Status: Invalid Allocation Unit size\n", 3079288cac0SWolfram Sang mmc_hostname(card->host)); 3089288cac0SWolfram Sang } 309dfe86cbaSAdrian Hunter } 3105275a652SUri Yanai 311bc47e2f6SAvri Altman /* 312bc47e2f6SAvri Altman * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set 313bc47e2f6SAvri Altman */ 314bc47e2f6SAvri Altman resp[3] = card->raw_ssr[6]; 315bc47e2f6SAvri Altman discard_support = UNSTUFF_BITS(resp, 313 - 288, 1); 316bc47e2f6SAvri Altman card->erase_arg = (card->scr.sda_specx && discard_support) ? 317bc47e2f6SAvri Altman SD_DISCARD_ARG : SD_ERASE_ARG; 31801904ff7SAvri Altman 3195275a652SUri Yanai return 0; 320dfe86cbaSAdrian Hunter } 321dfe86cbaSAdrian Hunter 322dfe86cbaSAdrian Hunter /* 3231addfcdbSPierre Ossman * Fetches and decodes switch information 3247ea239d9SPierre Ossman */ 3251addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 3267ea239d9SPierre Ossman { 3277ea239d9SPierre Ossman int err; 3287ea239d9SPierre Ossman u8 *status; 3297ea239d9SPierre Ossman 3303373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 33117b0429dSPierre Ossman return 0; 3323373c0aeSPierre Ossman 3333373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 3346606110dSJoe Perches pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", 3353373c0aeSPierre Ossman mmc_hostname(card->host)); 33617b0429dSPierre Ossman return 0; 3373373c0aeSPierre Ossman } 3383373c0aeSPierre Ossman 3397ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 340e1df7ae3SMarkus Elfring if (!status) 34117b0429dSPierre Ossman return -ENOMEM; 3427ea239d9SPierre Ossman 343a39ca6aeSAaron Lu /* 344a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation. 345a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not 346a39ca6aeSAaron Lu * change with the arguments. 347a39ca6aeSAaron Lu */ 348a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status); 34917b0429dSPierre Ossman if (err) { 350013909c4SArindam Nath /* 351013909c4SArindam Nath * If the host or the card can't do the switch, 352013909c4SArindam Nath * fail more gracefully. 353013909c4SArindam Nath */ 354013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 355adf66a0dSPierre Ossman goto out; 356adf66a0dSPierre Ossman 3576606110dSJoe Perches pr_warn("%s: problem reading Bus Speed modes\n", 3583373c0aeSPierre Ossman mmc_hostname(card->host)); 35917b0429dSPierre Ossman err = 0; 360adf66a0dSPierre Ossman 3617ea239d9SPierre Ossman goto out; 3627ea239d9SPierre Ossman } 3637ea239d9SPierre Ossman 364fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED) 365fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; 366f2815f68SSubhash Jadavani 367013909c4SArindam Nath if (card->scr.sda_spec3) { 368013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 369a39ca6aeSAaron Lu /* Driver Strengths supported by the card */ 370013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 371d9812780SRussell King card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; 372013909c4SArindam Nath } 3737ea239d9SPierre Ossman 3741addfcdbSPierre Ossman out: 3751addfcdbSPierre Ossman kfree(status); 3761addfcdbSPierre Ossman 3771addfcdbSPierre Ossman return err; 3781addfcdbSPierre Ossman } 3791addfcdbSPierre Ossman 3801addfcdbSPierre Ossman /* 3811addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3821addfcdbSPierre Ossman */ 38371578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3841addfcdbSPierre Ossman { 3851addfcdbSPierre Ossman int err; 3861addfcdbSPierre Ossman u8 *status; 3871addfcdbSPierre Ossman 3883373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 38917b0429dSPierre Ossman return 0; 3903373c0aeSPierre Ossman 3913373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 39217b0429dSPierre Ossman return 0; 3933373c0aeSPierre Ossman 3941addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 39517b0429dSPierre Ossman return 0; 3961addfcdbSPierre Ossman 3971addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 39817b0429dSPierre Ossman return 0; 3991addfcdbSPierre Ossman 4001addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 401e1df7ae3SMarkus Elfring if (!status) 40217b0429dSPierre Ossman return -ENOMEM; 4031addfcdbSPierre Ossman 4049d624f4fSJisheng Zhang err = mmc_sd_switch(card, 1, 0, HIGH_SPEED_BUS_SPEED, status); 40517b0429dSPierre Ossman if (err) 4067ea239d9SPierre Ossman goto out; 4077ea239d9SPierre Ossman 4089d624f4fSJisheng Zhang if ((status[16] & 0xF) != HIGH_SPEED_BUS_SPEED) { 4096606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n", 4107ea239d9SPierre Ossman mmc_hostname(card->host)); 41171578a1eSMichal Miroslaw err = 0; 4127ea239d9SPierre Ossman } else { 41371578a1eSMichal Miroslaw err = 1; 4147ea239d9SPierre Ossman } 4157ea239d9SPierre Ossman 4167ea239d9SPierre Ossman out: 4177ea239d9SPierre Ossman kfree(status); 4187ea239d9SPierre Ossman 4197ea239d9SPierre Ossman return err; 4207ea239d9SPierre Ossman } 4217ea239d9SPierre Ossman 422d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 423d6d50a15SArindam Nath { 424fa021cefSAdrian Hunter int card_drv_type, drive_strength, drv_type; 425d6d50a15SArindam Nath int err; 426d6d50a15SArindam Nath 4273853a042SAdrian Hunter card->drive_strength = 0; 4283853a042SAdrian Hunter 429fa021cefSAdrian Hunter card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; 430ca8e99b3SPhilip Rakity 431e23350b3SAdrian Hunter drive_strength = mmc_select_drive_strength(card, 432ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 433e23350b3SAdrian Hunter card_drv_type, &drv_type); 434ca8e99b3SPhilip Rakity 435b4f30a17SAdrian Hunter if (drive_strength) { 436ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 437d6d50a15SArindam Nath if (err) 438d6d50a15SArindam Nath return err; 439ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 4406606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n", 441d6d50a15SArindam Nath mmc_hostname(card->host)); 442d6d50a15SArindam Nath return 0; 443d6d50a15SArindam Nath } 4443853a042SAdrian Hunter card->drive_strength = drive_strength; 445b4f30a17SAdrian Hunter } 446d6d50a15SArindam Nath 447b4f30a17SAdrian Hunter if (drv_type) 448b4f30a17SAdrian Hunter mmc_set_driver_type(card->host, drv_type); 449d6d50a15SArindam Nath 450d6d50a15SArindam Nath return 0; 451d6d50a15SArindam Nath } 452d6d50a15SArindam Nath 45393c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 45449c468fcSArindam Nath { 45549c468fcSArindam Nath /* 45649c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 45749c468fcSArindam Nath * default speed. 45849c468fcSArindam Nath */ 4593f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 46093c712f9SSubhash Jadavani card->sd_bus_speed = 0; 46193c712f9SSubhash Jadavani return; 46293c712f9SSubhash Jadavani } 46349c468fcSArindam Nath 46449c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 46549c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 46693c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 46749c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 46849c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 46993c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 47049c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47149c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 47249c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 47393c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 47449c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47549c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 47649c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 47793c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 47849c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47949c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 48049c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 48149c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 48293c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 48393c712f9SSubhash Jadavani } 48449c468fcSArindam Nath } 48549c468fcSArindam Nath 48693c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 48793c712f9SSubhash Jadavani { 48893c712f9SSubhash Jadavani int err; 48993c712f9SSubhash Jadavani unsigned int timing = 0; 49093c712f9SSubhash Jadavani 49193c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 49293c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 49393c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 49493c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 49593c712f9SSubhash Jadavani break; 49693c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 49793c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 49893c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 49993c712f9SSubhash Jadavani break; 50093c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 50193c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 50293c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 50393c712f9SSubhash Jadavani break; 50493c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 50593c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 50693c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 50793c712f9SSubhash Jadavani break; 50893c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 50993c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 51093c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 51193c712f9SSubhash Jadavani break; 51293c712f9SSubhash Jadavani default: 51393c712f9SSubhash Jadavani return 0; 51493c712f9SSubhash Jadavani } 51593c712f9SSubhash Jadavani 51693c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 51749c468fcSArindam Nath if (err) 51849c468fcSArindam Nath return err; 51949c468fcSArindam Nath 52093c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 5216606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n", 52249c468fcSArindam Nath mmc_hostname(card->host)); 52349c468fcSArindam Nath else { 52449c468fcSArindam Nath mmc_set_timing(card->host, timing); 52549c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 52649c468fcSArindam Nath } 52749c468fcSArindam Nath 52849c468fcSArindam Nath return 0; 52949c468fcSArindam Nath } 53049c468fcSArindam Nath 53155c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 53255c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 53355c4665eSAaron Lu { 53455c4665eSAaron Lu u32 voltage, max_current; 53555c4665eSAaron Lu 53655c4665eSAaron Lu voltage = 1 << host->ios.vdd; 53755c4665eSAaron Lu switch (voltage) { 53855c4665eSAaron Lu case MMC_VDD_165_195: 53955c4665eSAaron Lu max_current = host->max_current_180; 54055c4665eSAaron Lu break; 54155c4665eSAaron Lu case MMC_VDD_29_30: 54255c4665eSAaron Lu case MMC_VDD_30_31: 54355c4665eSAaron Lu max_current = host->max_current_300; 54455c4665eSAaron Lu break; 54555c4665eSAaron Lu case MMC_VDD_32_33: 54655c4665eSAaron Lu case MMC_VDD_33_34: 54755c4665eSAaron Lu max_current = host->max_current_330; 54855c4665eSAaron Lu break; 54955c4665eSAaron Lu default: 55055c4665eSAaron Lu max_current = 0; 55155c4665eSAaron Lu } 55255c4665eSAaron Lu 55355c4665eSAaron Lu return max_current; 55455c4665eSAaron Lu } 55555c4665eSAaron Lu 5565371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5575371c927SArindam Nath { 5580aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5595371c927SArindam Nath int err; 56055c4665eSAaron Lu u32 max_current; 5615371c927SArindam Nath 5625371c927SArindam Nath /* 5635371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5640aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5650aa67700SPhilip Rakity * current limit. 56655c4665eSAaron Lu */ 56755c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 56855c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 56955c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 57055c4665eSAaron Lu return 0; 57155c4665eSAaron Lu 57255c4665eSAaron Lu /* 57355c4665eSAaron Lu * Host has different current capabilities when operating at 57455c4665eSAaron Lu * different voltages, so find out its max current first. 57555c4665eSAaron Lu */ 57655c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 57755c4665eSAaron Lu 57855c4665eSAaron Lu /* 579a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 580a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 581a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 582a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 583a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 584a39ca6aeSAaron Lu * maximum 300ma from the host. 585d9812780SRussell King * 586d9812780SRussell King * The above is incorrect: if we try to set a current limit that is 587d9812780SRussell King * not supported by the card, the card can rightfully error out the 588d9812780SRussell King * attempt, and remain at the default current limit. This results 589d9812780SRussell King * in a 300mA card being limited to 200mA even though the host 590d9812780SRussell King * supports 800mA. Failures seen with SanDisk 8GB UHS cards with 591d9812780SRussell King * an iMX6 host. --rmk 5925371c927SArindam Nath */ 593d9812780SRussell King if (max_current >= 800 && 594d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) 5955371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 596d9812780SRussell King else if (max_current >= 600 && 597d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) 5985371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 599d9812780SRussell King else if (max_current >= 400 && 600d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) 6015371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 602d9812780SRussell King else if (max_current >= 200 && 603d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) 6045371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 6055371c927SArindam Nath 6060aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 6075371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 6085371c927SArindam Nath if (err) 6095371c927SArindam Nath return err; 6105371c927SArindam Nath 6115371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 6126606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n", 6135371c927SArindam Nath mmc_hostname(card->host)); 6145371c927SArindam Nath 6150aa67700SPhilip Rakity } 616a39ca6aeSAaron Lu 6175371c927SArindam Nath return 0; 6185371c927SArindam Nath } 6195371c927SArindam Nath 620d6d50a15SArindam Nath /* 621d6d50a15SArindam Nath * UHS-I specific initialization procedure 622d6d50a15SArindam Nath */ 623d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 624d6d50a15SArindam Nath { 625d6d50a15SArindam Nath int err; 626d6d50a15SArindam Nath u8 *status; 627d6d50a15SArindam Nath 628d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 629d6d50a15SArindam Nath return 0; 630d6d50a15SArindam Nath 631d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 632e1df7ae3SMarkus Elfring if (!status) 633d6d50a15SArindam Nath return -ENOMEM; 634d6d50a15SArindam Nath 635d6d50a15SArindam Nath /* Set 4-bit bus width */ 636d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 637d6d50a15SArindam Nath if (err) 638d6d50a15SArindam Nath goto out; 639d6d50a15SArindam Nath 640d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 641d6d50a15SArindam Nath 64293c712f9SSubhash Jadavani /* 64393c712f9SSubhash Jadavani * Select the bus speed mode depending on host 64493c712f9SSubhash Jadavani * and card capability. 64593c712f9SSubhash Jadavani */ 64693c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 64793c712f9SSubhash Jadavani 648d6d50a15SArindam Nath /* Set the driver strength for the card */ 649d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 65049c468fcSArindam Nath if (err) 65149c468fcSArindam Nath goto out; 65249c468fcSArindam Nath 65393c712f9SSubhash Jadavani /* Set current limit for the card */ 65493c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6555371c927SArindam Nath if (err) 6565371c927SArindam Nath goto out; 6575371c927SArindam Nath 65893c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 65993c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 660b513ea25SArindam Nath if (err) 661b513ea25SArindam Nath goto out; 662b513ea25SArindam Nath 663810e08eeSFredrik Soderstedt /* 664810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 665810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 666810e08eeSFredrik Soderstedt */ 66763e415c6SAdrian Hunter if (!mmc_host_is_spi(card->host) && 668e10c3219SCarlo Caione (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || 669e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_DDR50 || 670e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { 67163e415c6SAdrian Hunter err = mmc_execute_tuning(card); 6724324f6deSWeijun Yang 6734324f6deSWeijun Yang /* 6744324f6deSWeijun Yang * As SD Specifications Part1 Physical Layer Specification 6754324f6deSWeijun Yang * Version 3.01 says, CMD19 tuning is available for unlocked 6764324f6deSWeijun Yang * cards in transfer state of 1.8V signaling mode. The small 6774324f6deSWeijun Yang * difference between v3.00 and 3.01 spec means that CMD19 6784324f6deSWeijun Yang * tuning is also available for DDR50 mode. 6794324f6deSWeijun Yang */ 680e10c3219SCarlo Caione if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { 6814324f6deSWeijun Yang pr_warn("%s: ddr50 tuning failed\n", 6824324f6deSWeijun Yang mmc_hostname(card->host)); 6834324f6deSWeijun Yang err = 0; 6844324f6deSWeijun Yang } 6854324f6deSWeijun Yang } 6864324f6deSWeijun Yang 687d6d50a15SArindam Nath out: 688d6d50a15SArindam Nath kfree(status); 689d6d50a15SArindam Nath 690d6d50a15SArindam Nath return err; 691d6d50a15SArindam Nath } 692d6d50a15SArindam Nath 69351ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 69451ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 69551ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 69651ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 69751ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 6985275a652SUri Yanai MMC_DEV_ATTR(ssr, 6995275a652SUri Yanai "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", 7005275a652SUri Yanai card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], 7015275a652SUri Yanai card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], 7025275a652SUri Yanai card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], 7035275a652SUri Yanai card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], 7045275a652SUri Yanai card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], 7055275a652SUri Yanai card->raw_ssr[15]); 70651ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 707dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 708dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 70951ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 71051ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 71151ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 71251ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 71351ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 71451ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 715c892b0d8SBastian Stender MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); 716974e85e9SHarish Jenny K N MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); 71751ec92e2SPierre Ossman 71851ec92e2SPierre Ossman 719f5d8a5feSSergey Shtylyov static ssize_t mmc_dsr_show(struct device *dev, struct device_attribute *attr, 7206825a606SBojan Prtvar char *buf) 7216825a606SBojan Prtvar { 7226825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev); 7236825a606SBojan Prtvar struct mmc_host *host = card->host; 7246825a606SBojan Prtvar 7256825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req) 726f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "0x%x\n", host->dsr); 7276825a606SBojan Prtvar /* return default DSR value */ 728f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "0x%x\n", 0x404); 7296825a606SBojan Prtvar } 7306825a606SBojan Prtvar 7316825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); 7326825a606SBojan Prtvar 733254e1754SPali Rohár MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor); 734254e1754SPali Rohár MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device); 735b698f6abSPali Rohár MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev); 736b698f6abSPali Rohár 737b698f6abSPali Rohár #define sdio_info_attr(num) \ 738b698f6abSPali Rohár static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \ 739b698f6abSPali Rohár { \ 740b698f6abSPali Rohár struct mmc_card *card = mmc_dev_to_card(dev); \ 741b698f6abSPali Rohár \ 742b698f6abSPali Rohár if (num > card->num_info) \ 743b698f6abSPali Rohár return -ENODATA; \ 744b698f6abSPali Rohár if (!card->info[num - 1][0]) \ 745b698f6abSPali Rohár return 0; \ 746f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "%s\n", card->info[num - 1]); \ 747b698f6abSPali Rohár } \ 748b698f6abSPali Rohár static DEVICE_ATTR_RO(info##num) 749b698f6abSPali Rohár 750b698f6abSPali Rohár sdio_info_attr(1); 751b698f6abSPali Rohár sdio_info_attr(2); 752b698f6abSPali Rohár sdio_info_attr(3); 753b698f6abSPali Rohár sdio_info_attr(4); 754254e1754SPali Rohár 75551ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 756254e1754SPali Rohár &dev_attr_vendor.attr, 757254e1754SPali Rohár &dev_attr_device.attr, 758b698f6abSPali Rohár &dev_attr_revision.attr, 759b698f6abSPali Rohár &dev_attr_info1.attr, 760b698f6abSPali Rohár &dev_attr_info2.attr, 761b698f6abSPali Rohár &dev_attr_info3.attr, 762b698f6abSPali Rohár &dev_attr_info4.attr, 76351ec92e2SPierre Ossman &dev_attr_cid.attr, 76451ec92e2SPierre Ossman &dev_attr_csd.attr, 76551ec92e2SPierre Ossman &dev_attr_scr.attr, 7665275a652SUri Yanai &dev_attr_ssr.attr, 76751ec92e2SPierre Ossman &dev_attr_date.attr, 768dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 769dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 77051ec92e2SPierre Ossman &dev_attr_fwrev.attr, 77151ec92e2SPierre Ossman &dev_attr_hwrev.attr, 77251ec92e2SPierre Ossman &dev_attr_manfid.attr, 77351ec92e2SPierre Ossman &dev_attr_name.attr, 77451ec92e2SPierre Ossman &dev_attr_oemid.attr, 77551ec92e2SPierre Ossman &dev_attr_serial.attr, 7765fb06af7SBojan Prtvar &dev_attr_ocr.attr, 777974e85e9SHarish Jenny K N &dev_attr_rca.attr, 7786825a606SBojan Prtvar &dev_attr_dsr.attr, 77951ec92e2SPierre Ossman NULL, 78051ec92e2SPierre Ossman }; 781254e1754SPali Rohár 782254e1754SPali Rohár static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr, 783254e1754SPali Rohár int index) 784254e1754SPali Rohár { 785e449d983STian Tao struct device *dev = kobj_to_dev(kobj); 786254e1754SPali Rohár struct mmc_card *card = mmc_dev_to_card(dev); 787254e1754SPali Rohár 788b698f6abSPali Rohár /* CIS vendor and device ids, revision and info string are available only for Combo cards */ 789b698f6abSPali Rohár if ((attr == &dev_attr_vendor.attr || 790b698f6abSPali Rohár attr == &dev_attr_device.attr || 791b698f6abSPali Rohár attr == &dev_attr_revision.attr || 792b698f6abSPali Rohár attr == &dev_attr_info1.attr || 793b698f6abSPali Rohár attr == &dev_attr_info2.attr || 794b698f6abSPali Rohár attr == &dev_attr_info3.attr || 795b698f6abSPali Rohár attr == &dev_attr_info4.attr 796b698f6abSPali Rohár ) && card->type != MMC_TYPE_SD_COMBO) 797254e1754SPali Rohár return 0; 798254e1754SPali Rohár 799254e1754SPali Rohár return attr->mode; 800254e1754SPali Rohár } 801254e1754SPali Rohár 802254e1754SPali Rohár static const struct attribute_group sd_std_group = { 803254e1754SPali Rohár .attrs = sd_std_attrs, 804254e1754SPali Rohár .is_visible = sd_std_is_visible, 805254e1754SPali Rohár }; 806254e1754SPali Rohár __ATTRIBUTE_GROUPS(sd_std); 80751ec92e2SPierre Ossman 80871578a1eSMichal Miroslaw struct device_type sd_type = { 809d1e58212SAxel Lin .groups = sd_std_groups, 81051ec92e2SPierre Ossman }; 81151ec92e2SPierre Ossman 8127ea239d9SPierre Ossman /* 81371578a1eSMichal Miroslaw * Fetch CID from card. 8146abaa0c9SPierre Ossman */ 815d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 8166abaa0c9SPierre Ossman { 8176abaa0c9SPierre Ossman int err; 81855c4665eSAaron Lu u32 max_current; 8190797e5f1SJohan Rudholm int retries = 10; 82069041150SUlf Hansson u32 pocr = ocr; 8210797e5f1SJohan Rudholm 8220797e5f1SJohan Rudholm try_again: 8230797e5f1SJohan Rudholm if (!retries) { 8240797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 8256606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); 8260797e5f1SJohan Rudholm } 8276abaa0c9SPierre Ossman 8286abaa0c9SPierre Ossman /* 8296abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 8306abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 8316abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 8326abaa0c9SPierre Ossman * respond. 8336abaa0c9SPierre Ossman */ 8346abaa0c9SPierre Ossman mmc_go_idle(host); 8356abaa0c9SPierre Ossman 8366abaa0c9SPierre Ossman /* 8376abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 8386abaa0c9SPierre Ossman * compliant card and we should set bit 30 8396abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 8406abaa0c9SPierre Ossman * block-addressed SDHC cards. 8416abaa0c9SPierre Ossman */ 8426abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 84317b0429dSPierre Ossman if (!err) 844f2119df6SArindam Nath ocr |= SD_OCR_CCS; 8456abaa0c9SPierre Ossman 846f2119df6SArindam Nath /* 847f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 8480797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 8490797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 850f2119df6SArindam Nath */ 8510797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 852f2119df6SArindam Nath ocr |= SD_OCR_S18R; 853f2119df6SArindam Nath 85455c4665eSAaron Lu /* 85555c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 85655c4665eSAaron Lu * XPC should be set to 1. 85755c4665eSAaron Lu */ 85855c4665eSAaron Lu max_current = sd_get_host_max_current(host); 85955c4665eSAaron Lu if (max_current > 150) 860f2119df6SArindam Nath ocr |= SD_OCR_XPC; 861f2119df6SArindam Nath 862d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 86317b0429dSPierre Ossman if (err) 86471578a1eSMichal Miroslaw return err; 8656abaa0c9SPierre Ossman 866f2119df6SArindam Nath /* 86709247e11SChristian Löhle * In case the S18A bit is set in the response, let's start the signal 86809247e11SChristian Löhle * voltage switch procedure. SPI mode doesn't support CMD11. 86909247e11SChristian Löhle * Note that, according to the spec, the S18A bit is not valid unless 87009247e11SChristian Löhle * the CCS bit is set as well. We deliberately deviate from the spec in 87109247e11SChristian Löhle * regards to this, which allows UHS-I to be supported for SDSC cards. 872f2119df6SArindam Nath */ 87309247e11SChristian Löhle if (!mmc_host_is_spi(host) && rocr && (*rocr & 0x01000000)) { 8742ed573b6SUlf Hansson err = mmc_set_uhs_voltage(host, pocr); 8750797e5f1SJohan Rudholm if (err == -EAGAIN) { 8760797e5f1SJohan Rudholm retries--; 8770797e5f1SJohan Rudholm goto try_again; 8780797e5f1SJohan Rudholm } else if (err) { 8790797e5f1SJohan Rudholm retries = 0; 880f2119df6SArindam Nath goto try_again; 881f2119df6SArindam Nath } 882f2119df6SArindam Nath } 883f2119df6SArindam Nath 884af517150SDavid Brownell err = mmc_send_cid(host, cid); 88571578a1eSMichal Miroslaw return err; 886adf66a0dSPierre Ossman } 8876abaa0c9SPierre Ossman 888bd7342feSYue Hu int mmc_sd_get_csd(struct mmc_card *card) 88971578a1eSMichal Miroslaw { 89071578a1eSMichal Miroslaw int err; 8916abaa0c9SPierre Ossman 8926abaa0c9SPierre Ossman /* 8936abaa0c9SPierre Ossman * Fetch CSD from card. 8946abaa0c9SPierre Ossman */ 8956abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 89617b0429dSPierre Ossman if (err) 89771578a1eSMichal Miroslaw return err; 8986abaa0c9SPierre Ossman 899bd766312SPierre Ossman err = mmc_decode_csd(card); 900adf66a0dSPierre Ossman if (err) 90171578a1eSMichal Miroslaw return err; 902bd766312SPierre Ossman 90371578a1eSMichal Miroslaw return 0; 9046abaa0c9SPierre Ossman } 9056abaa0c9SPierre Ossman 9069f6e0bffSLars-Peter Clausen static int mmc_sd_get_ro(struct mmc_host *host) 9079f6e0bffSLars-Peter Clausen { 9089f6e0bffSLars-Peter Clausen int ro; 9099f6e0bffSLars-Peter Clausen 9109f6e0bffSLars-Peter Clausen /* 9119f6e0bffSLars-Peter Clausen * Some systems don't feature a write-protect pin and don't need one. 9129f6e0bffSLars-Peter Clausen * E.g. because they only have micro-SD card slot. For those systems 9139f6e0bffSLars-Peter Clausen * assume that the SD card is always read-write. 9149f6e0bffSLars-Peter Clausen */ 9159f6e0bffSLars-Peter Clausen if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) 9169f6e0bffSLars-Peter Clausen return 0; 9179f6e0bffSLars-Peter Clausen 9189f6e0bffSLars-Peter Clausen if (!host->ops->get_ro) 9199f6e0bffSLars-Peter Clausen return -1; 9209f6e0bffSLars-Peter Clausen 9219f6e0bffSLars-Peter Clausen ro = host->ops->get_ro(host); 9229f6e0bffSLars-Peter Clausen 9239f6e0bffSLars-Peter Clausen return ro; 9249f6e0bffSLars-Peter Clausen } 9259f6e0bffSLars-Peter Clausen 92671578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 92771578a1eSMichal Miroslaw bool reinit) 92871578a1eSMichal Miroslaw { 92971578a1eSMichal Miroslaw int err; 9306abaa0c9SPierre Ossman 93171578a1eSMichal Miroslaw if (!reinit) { 9326abaa0c9SPierre Ossman /* 9336abaa0c9SPierre Ossman * Fetch SCR from card. 9346abaa0c9SPierre Ossman */ 93506c9ccb7SWinkler, Tomas err = mmc_app_send_scr(card); 93617b0429dSPierre Ossman if (err) 93771578a1eSMichal Miroslaw return err; 9386abaa0c9SPierre Ossman 939bd766312SPierre Ossman err = mmc_decode_scr(card); 94071578a1eSMichal Miroslaw if (err) 94171578a1eSMichal Miroslaw return err; 9426abaa0c9SPierre Ossman 9436abaa0c9SPierre Ossman /* 944dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 945dfe86cbaSAdrian Hunter */ 946dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 947dfe86cbaSAdrian Hunter if (err) 948dfe86cbaSAdrian Hunter return err; 949dfe86cbaSAdrian Hunter 950dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 951dfe86cbaSAdrian Hunter mmc_init_erase(card); 952dfe86cbaSAdrian Hunter 953dfe86cbaSAdrian Hunter /* 9546abaa0c9SPierre Ossman * Fetch switch information from card. 9556abaa0c9SPierre Ossman */ 9566abaa0c9SPierre Ossman err = mmc_read_switch(card); 95717b0429dSPierre Ossman if (err) 95871578a1eSMichal Miroslaw return err; 9596abaa0c9SPierre Ossman } 9606abaa0c9SPierre Ossman 9616abaa0c9SPierre Ossman /* 9629d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 9639d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 9649d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 9659d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 9669d9f25c0SWolfgang Muees */ 9679d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 9689d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 9699d9f25c0SWolfgang Muees if (err) 97071578a1eSMichal Miroslaw return err; 9719d9f25c0SWolfgang Muees } 9729d9f25c0SWolfgang Muees 9739d9f25c0SWolfgang Muees /* 97471578a1eSMichal Miroslaw * Check if read-only switch is active. 9756abaa0c9SPierre Ossman */ 97671578a1eSMichal Miroslaw if (!reinit) { 9779f6e0bffSLars-Peter Clausen int ro = mmc_sd_get_ro(host); 97871578a1eSMichal Miroslaw 97971578a1eSMichal Miroslaw if (ro < 0) { 9806606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", 98171578a1eSMichal Miroslaw mmc_hostname(host)); 98271578a1eSMichal Miroslaw } else if (ro > 0) { 98371578a1eSMichal Miroslaw mmc_card_set_readonly(card); 98471578a1eSMichal Miroslaw } 98571578a1eSMichal Miroslaw } 98671578a1eSMichal Miroslaw 98771578a1eSMichal Miroslaw return 0; 98871578a1eSMichal Miroslaw } 98971578a1eSMichal Miroslaw 99071578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 99171578a1eSMichal Miroslaw { 99271578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 9936abaa0c9SPierre Ossman 994cdc99179SSeungwon Jeon if (mmc_card_hs(card)) { 9956abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 9966abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 9976abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 9986abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 9996abaa0c9SPierre Ossman } 10006abaa0c9SPierre Ossman 100171578a1eSMichal Miroslaw return max_dtr; 100271578a1eSMichal Miroslaw } 100371578a1eSMichal Miroslaw 10046a11fc47SAdrian Hunter static bool mmc_sd_card_using_v18(struct mmc_card *card) 10056a11fc47SAdrian Hunter { 10066a11fc47SAdrian Hunter /* 10076a11fc47SAdrian Hunter * According to the SD spec., the Bus Speed Mode (function group 1) bits 10086a11fc47SAdrian Hunter * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus 10096a11fc47SAdrian Hunter * they can be used to determine if the card has already switched to 10106a11fc47SAdrian Hunter * 1.8V signaling. 10116a11fc47SAdrian Hunter */ 10126a11fc47SAdrian Hunter return card->sw_caps.sd3_bus_mode & 10136a11fc47SAdrian Hunter (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50); 10146a11fc47SAdrian Hunter } 10156a11fc47SAdrian Hunter 10162c5d4276SUlf Hansson static int sd_write_ext_reg(struct mmc_card *card, u8 fno, u8 page, u16 offset, 10172c5d4276SUlf Hansson u8 reg_data) 10182c5d4276SUlf Hansson { 10192c5d4276SUlf Hansson struct mmc_host *host = card->host; 10202c5d4276SUlf Hansson struct mmc_request mrq = {}; 10212c5d4276SUlf Hansson struct mmc_command cmd = {}; 10222c5d4276SUlf Hansson struct mmc_data data = {}; 10232c5d4276SUlf Hansson struct scatterlist sg; 10242c5d4276SUlf Hansson u8 *reg_buf; 10252c5d4276SUlf Hansson 10262c5d4276SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 10272c5d4276SUlf Hansson if (!reg_buf) 10282c5d4276SUlf Hansson return -ENOMEM; 10292c5d4276SUlf Hansson 10302c5d4276SUlf Hansson mrq.cmd = &cmd; 10312c5d4276SUlf Hansson mrq.data = &data; 10322c5d4276SUlf Hansson 10332c5d4276SUlf Hansson /* 10342c5d4276SUlf Hansson * Arguments of CMD49: 10352c5d4276SUlf Hansson * [31:31] MIO (0 = memory). 10362c5d4276SUlf Hansson * [30:27] FNO (function number). 10372c5d4276SUlf Hansson * [26:26] MW - mask write mode (0 = disable). 10382c5d4276SUlf Hansson * [25:18] page number. 10392c5d4276SUlf Hansson * [17:9] offset address. 10402c5d4276SUlf Hansson * [8:0] length (0 = 1 byte). 10412c5d4276SUlf Hansson */ 10422c5d4276SUlf Hansson cmd.arg = fno << 27 | page << 18 | offset << 9; 10432c5d4276SUlf Hansson 10442c5d4276SUlf Hansson /* The first byte in the buffer is the data to be written. */ 10452c5d4276SUlf Hansson reg_buf[0] = reg_data; 10462c5d4276SUlf Hansson 10472c5d4276SUlf Hansson data.flags = MMC_DATA_WRITE; 10482c5d4276SUlf Hansson data.blksz = 512; 10492c5d4276SUlf Hansson data.blocks = 1; 10502c5d4276SUlf Hansson data.sg = &sg; 10512c5d4276SUlf Hansson data.sg_len = 1; 10522c5d4276SUlf Hansson sg_init_one(&sg, reg_buf, 512); 10532c5d4276SUlf Hansson 10542c5d4276SUlf Hansson cmd.opcode = SD_WRITE_EXTR_SINGLE; 10552c5d4276SUlf Hansson cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; 10562c5d4276SUlf Hansson 10572c5d4276SUlf Hansson mmc_set_data_timeout(&data, card); 10582c5d4276SUlf Hansson mmc_wait_for_req(host, &mrq); 10592c5d4276SUlf Hansson 10602c5d4276SUlf Hansson kfree(reg_buf); 10612c5d4276SUlf Hansson 10622c5d4276SUlf Hansson /* 10632c5d4276SUlf Hansson * Note that, the SD card is allowed to signal busy on DAT0 up to 1s 10642c5d4276SUlf Hansson * after the CMD49. Although, let's leave this to be managed by the 10652c5d4276SUlf Hansson * caller. 10662c5d4276SUlf Hansson */ 10672c5d4276SUlf Hansson 10682c5d4276SUlf Hansson if (cmd.error) 10692c5d4276SUlf Hansson return cmd.error; 10702c5d4276SUlf Hansson if (data.error) 10712c5d4276SUlf Hansson return data.error; 10722c5d4276SUlf Hansson 10732c5d4276SUlf Hansson return 0; 10742c5d4276SUlf Hansson } 10752c5d4276SUlf Hansson 1076c784f927SUlf Hansson static int sd_read_ext_reg(struct mmc_card *card, u8 fno, u8 page, 1077c784f927SUlf Hansson u16 offset, u16 len, u8 *reg_buf) 1078c784f927SUlf Hansson { 1079c784f927SUlf Hansson u32 cmd_args; 1080c784f927SUlf Hansson 1081c784f927SUlf Hansson /* 1082c784f927SUlf Hansson * Command arguments of CMD48: 1083c784f927SUlf Hansson * [31:31] MIO (0 = memory). 1084c784f927SUlf Hansson * [30:27] FNO (function number). 1085c784f927SUlf Hansson * [26:26] reserved (0). 1086c784f927SUlf Hansson * [25:18] page number. 1087c784f927SUlf Hansson * [17:9] offset address. 1088c784f927SUlf Hansson * [8:0] length (0 = 1 byte, 1ff = 512 bytes). 1089c784f927SUlf Hansson */ 1090c784f927SUlf Hansson cmd_args = fno << 27 | page << 18 | offset << 9 | (len -1); 1091c784f927SUlf Hansson 1092c784f927SUlf Hansson return mmc_send_adtc_data(card, card->host, SD_READ_EXTR_SINGLE, 1093c784f927SUlf Hansson cmd_args, reg_buf, 512); 1094c784f927SUlf Hansson } 1095c784f927SUlf Hansson 1096c784f927SUlf Hansson static int sd_parse_ext_reg_power(struct mmc_card *card, u8 fno, u8 page, 1097c784f927SUlf Hansson u16 offset) 1098c784f927SUlf Hansson { 1099c784f927SUlf Hansson int err; 1100c784f927SUlf Hansson u8 *reg_buf; 1101c784f927SUlf Hansson 1102c784f927SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 1103c784f927SUlf Hansson if (!reg_buf) 1104c784f927SUlf Hansson return -ENOMEM; 1105c784f927SUlf Hansson 1106c784f927SUlf Hansson /* Read the extension register for power management function. */ 1107c784f927SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf); 1108c784f927SUlf Hansson if (err) { 1109c784f927SUlf Hansson pr_warn("%s: error %d reading PM func of ext reg\n", 1110c784f927SUlf Hansson mmc_hostname(card->host), err); 1111c784f927SUlf Hansson goto out; 1112c784f927SUlf Hansson } 1113c784f927SUlf Hansson 1114c784f927SUlf Hansson /* PM revision consists of 4 bits. */ 1115c784f927SUlf Hansson card->ext_power.rev = reg_buf[0] & 0xf; 1116c784f927SUlf Hansson 1117c784f927SUlf Hansson /* Power Off Notification support at bit 4. */ 1118c784f927SUlf Hansson if (reg_buf[1] & BIT(4)) 1119c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_OFF_NOTIFY; 1120c784f927SUlf Hansson 1121c784f927SUlf Hansson /* Power Sustenance support at bit 5. */ 1122c784f927SUlf Hansson if (reg_buf[1] & BIT(5)) 1123c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_SUSTENANCE; 1124c784f927SUlf Hansson 1125c784f927SUlf Hansson /* Power Down Mode support at bit 6. */ 1126c784f927SUlf Hansson if (reg_buf[1] & BIT(6)) 1127c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_DOWN_MODE; 1128c784f927SUlf Hansson 1129c784f927SUlf Hansson card->ext_power.fno = fno; 1130c784f927SUlf Hansson card->ext_power.page = page; 1131c784f927SUlf Hansson card->ext_power.offset = offset; 1132c784f927SUlf Hansson 1133c784f927SUlf Hansson out: 1134c784f927SUlf Hansson kfree(reg_buf); 1135c784f927SUlf Hansson return err; 1136c784f927SUlf Hansson } 1137c784f927SUlf Hansson 11384e6306e0SUlf Hansson static int sd_parse_ext_reg_perf(struct mmc_card *card, u8 fno, u8 page, 11394e6306e0SUlf Hansson u16 offset) 11404e6306e0SUlf Hansson { 11414e6306e0SUlf Hansson int err; 11424e6306e0SUlf Hansson u8 *reg_buf; 11434e6306e0SUlf Hansson 11444e6306e0SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 11454e6306e0SUlf Hansson if (!reg_buf) 11464e6306e0SUlf Hansson return -ENOMEM; 11474e6306e0SUlf Hansson 11484e6306e0SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf); 11494e6306e0SUlf Hansson if (err) { 11504e6306e0SUlf Hansson pr_warn("%s: error %d reading PERF func of ext reg\n", 11514e6306e0SUlf Hansson mmc_hostname(card->host), err); 11524e6306e0SUlf Hansson goto out; 11534e6306e0SUlf Hansson } 11544e6306e0SUlf Hansson 11554e6306e0SUlf Hansson /* PERF revision. */ 11564e6306e0SUlf Hansson card->ext_perf.rev = reg_buf[0]; 11574e6306e0SUlf Hansson 11584e6306e0SUlf Hansson /* FX_EVENT support at bit 0. */ 11594e6306e0SUlf Hansson if (reg_buf[1] & BIT(0)) 11604e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_FX_EVENT; 11614e6306e0SUlf Hansson 11624e6306e0SUlf Hansson /* Card initiated self-maintenance support at bit 0. */ 11634e6306e0SUlf Hansson if (reg_buf[2] & BIT(0)) 11644e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CARD_MAINT; 11654e6306e0SUlf Hansson 11664e6306e0SUlf Hansson /* Host initiated self-maintenance support at bit 1. */ 11674e6306e0SUlf Hansson if (reg_buf[2] & BIT(1)) 11684e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_HOST_MAINT; 11694e6306e0SUlf Hansson 11704e6306e0SUlf Hansson /* Cache support at bit 0. */ 11714e6306e0SUlf Hansson if (reg_buf[4] & BIT(0)) 11724e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CACHE; 11734e6306e0SUlf Hansson 11744e6306e0SUlf Hansson /* Command queue support indicated via queue depth bits (0 to 4). */ 11754e6306e0SUlf Hansson if (reg_buf[6] & 0x1f) 11764e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CMD_QUEUE; 11774e6306e0SUlf Hansson 11784e6306e0SUlf Hansson card->ext_perf.fno = fno; 11794e6306e0SUlf Hansson card->ext_perf.page = page; 11804e6306e0SUlf Hansson card->ext_perf.offset = offset; 11814e6306e0SUlf Hansson 11824e6306e0SUlf Hansson out: 11834e6306e0SUlf Hansson kfree(reg_buf); 11844e6306e0SUlf Hansson return err; 11854e6306e0SUlf Hansson } 11864e6306e0SUlf Hansson 1187c784f927SUlf Hansson static int sd_parse_ext_reg(struct mmc_card *card, u8 *gen_info_buf, 1188c784f927SUlf Hansson u16 *next_ext_addr) 1189c784f927SUlf Hansson { 1190c784f927SUlf Hansson u8 num_regs, fno, page; 1191c784f927SUlf Hansson u16 sfc, offset, ext = *next_ext_addr; 1192c784f927SUlf Hansson u32 reg_addr; 1193c784f927SUlf Hansson 1194c784f927SUlf Hansson /* 1195c784f927SUlf Hansson * Parse only one register set per extension, as that is sufficient to 1196c784f927SUlf Hansson * support the standard functions. This means another 48 bytes in the 1197c784f927SUlf Hansson * buffer must be available. 1198c784f927SUlf Hansson */ 1199c784f927SUlf Hansson if (ext + 48 > 512) 1200c784f927SUlf Hansson return -EFAULT; 1201c784f927SUlf Hansson 1202c784f927SUlf Hansson /* Standard Function Code */ 1203c784f927SUlf Hansson memcpy(&sfc, &gen_info_buf[ext], 2); 1204c784f927SUlf Hansson 1205c784f927SUlf Hansson /* Address to the next extension. */ 1206c784f927SUlf Hansson memcpy(next_ext_addr, &gen_info_buf[ext + 40], 2); 1207c784f927SUlf Hansson 1208c784f927SUlf Hansson /* Number of registers for this extension. */ 1209c784f927SUlf Hansson num_regs = gen_info_buf[ext + 42]; 1210c784f927SUlf Hansson 1211c784f927SUlf Hansson /* We support only one register per extension. */ 1212c784f927SUlf Hansson if (num_regs != 1) 1213c784f927SUlf Hansson return 0; 1214c784f927SUlf Hansson 1215c784f927SUlf Hansson /* Extension register address. */ 1216c784f927SUlf Hansson memcpy(®_addr, &gen_info_buf[ext + 44], 4); 1217c784f927SUlf Hansson 1218c784f927SUlf Hansson /* 9 bits (0 to 8) contains the offset address. */ 1219c784f927SUlf Hansson offset = reg_addr & 0x1ff; 1220c784f927SUlf Hansson 1221c784f927SUlf Hansson /* 8 bits (9 to 16) contains the page number. */ 1222c784f927SUlf Hansson page = reg_addr >> 9 & 0xff ; 1223c784f927SUlf Hansson 1224c784f927SUlf Hansson /* 4 bits (18 to 21) contains the function number. */ 1225c784f927SUlf Hansson fno = reg_addr >> 18 & 0xf; 1226c784f927SUlf Hansson 1227c784f927SUlf Hansson /* Standard Function Code for power management. */ 1228c784f927SUlf Hansson if (sfc == 0x1) 1229c784f927SUlf Hansson return sd_parse_ext_reg_power(card, fno, page, offset); 1230c784f927SUlf Hansson 12314e6306e0SUlf Hansson /* Standard Function Code for performance enhancement. */ 12324e6306e0SUlf Hansson if (sfc == 0x2) 12334e6306e0SUlf Hansson return sd_parse_ext_reg_perf(card, fno, page, offset); 12344e6306e0SUlf Hansson 1235c784f927SUlf Hansson return 0; 1236c784f927SUlf Hansson } 1237c784f927SUlf Hansson 1238c784f927SUlf Hansson static int sd_read_ext_regs(struct mmc_card *card) 1239c784f927SUlf Hansson { 1240c784f927SUlf Hansson int err, i; 1241c784f927SUlf Hansson u8 num_ext, *gen_info_buf; 1242c784f927SUlf Hansson u16 rev, len, next_ext_addr; 1243c784f927SUlf Hansson 1244c784f927SUlf Hansson if (mmc_host_is_spi(card->host)) 1245c784f927SUlf Hansson return 0; 1246c784f927SUlf Hansson 1247c784f927SUlf Hansson if (!(card->scr.cmds & SD_SCR_CMD48_SUPPORT)) 1248c784f927SUlf Hansson return 0; 1249c784f927SUlf Hansson 1250c784f927SUlf Hansson gen_info_buf = kzalloc(512, GFP_KERNEL); 1251c784f927SUlf Hansson if (!gen_info_buf) 1252c784f927SUlf Hansson return -ENOMEM; 1253c784f927SUlf Hansson 1254c784f927SUlf Hansson /* 1255c784f927SUlf Hansson * Read 512 bytes of general info, which is found at function number 0, 1256c784f927SUlf Hansson * at page 0 and with no offset. 1257c784f927SUlf Hansson */ 1258c784f927SUlf Hansson err = sd_read_ext_reg(card, 0, 0, 0, 512, gen_info_buf); 1259c784f927SUlf Hansson if (err) { 1260c784f927SUlf Hansson pr_warn("%s: error %d reading general info of SD ext reg\n", 1261c784f927SUlf Hansson mmc_hostname(card->host), err); 1262c784f927SUlf Hansson goto out; 1263c784f927SUlf Hansson } 1264c784f927SUlf Hansson 1265c784f927SUlf Hansson /* General info structure revision. */ 1266c784f927SUlf Hansson memcpy(&rev, &gen_info_buf[0], 2); 1267c784f927SUlf Hansson 1268c784f927SUlf Hansson /* Length of general info in bytes. */ 1269c784f927SUlf Hansson memcpy(&len, &gen_info_buf[2], 2); 1270c784f927SUlf Hansson 1271c784f927SUlf Hansson /* Number of extensions to be find. */ 1272c784f927SUlf Hansson num_ext = gen_info_buf[4]; 1273c784f927SUlf Hansson 1274c784f927SUlf Hansson /* We support revision 0, but limit it to 512 bytes for simplicity. */ 1275c784f927SUlf Hansson if (rev != 0 || len > 512) { 1276c784f927SUlf Hansson pr_warn("%s: non-supported SD ext reg layout\n", 1277c784f927SUlf Hansson mmc_hostname(card->host)); 1278c784f927SUlf Hansson goto out; 1279c784f927SUlf Hansson } 1280c784f927SUlf Hansson 1281c784f927SUlf Hansson /* 1282c784f927SUlf Hansson * Parse the extension registers. The first extension should start 1283c784f927SUlf Hansson * immediately after the general info header (16 bytes). 1284c784f927SUlf Hansson */ 1285c784f927SUlf Hansson next_ext_addr = 16; 1286c784f927SUlf Hansson for (i = 0; i < num_ext; i++) { 1287c784f927SUlf Hansson err = sd_parse_ext_reg(card, gen_info_buf, &next_ext_addr); 1288c784f927SUlf Hansson if (err) { 1289c784f927SUlf Hansson pr_warn("%s: error %d parsing SD ext reg\n", 1290c784f927SUlf Hansson mmc_hostname(card->host), err); 1291c784f927SUlf Hansson goto out; 1292c784f927SUlf Hansson } 1293c784f927SUlf Hansson } 1294c784f927SUlf Hansson 1295c784f927SUlf Hansson out: 1296c784f927SUlf Hansson kfree(gen_info_buf); 1297c784f927SUlf Hansson return err; 1298c784f927SUlf Hansson } 1299c784f927SUlf Hansson 1300130206a6SUlf Hansson static bool sd_cache_enabled(struct mmc_host *host) 1301130206a6SUlf Hansson { 1302130206a6SUlf Hansson return host->card->ext_perf.feature_enabled & SD_EXT_PERF_CACHE; 1303130206a6SUlf Hansson } 1304130206a6SUlf Hansson 1305130206a6SUlf Hansson static int sd_flush_cache(struct mmc_host *host) 1306130206a6SUlf Hansson { 1307130206a6SUlf Hansson struct mmc_card *card = host->card; 1308130206a6SUlf Hansson u8 *reg_buf, fno, page; 1309130206a6SUlf Hansson u16 offset; 1310130206a6SUlf Hansson int err; 1311130206a6SUlf Hansson 1312130206a6SUlf Hansson if (!sd_cache_enabled(host)) 1313130206a6SUlf Hansson return 0; 1314130206a6SUlf Hansson 1315130206a6SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 1316130206a6SUlf Hansson if (!reg_buf) 1317130206a6SUlf Hansson return -ENOMEM; 1318130206a6SUlf Hansson 1319130206a6SUlf Hansson /* 1320130206a6SUlf Hansson * Set Flush Cache at bit 0 in the performance enhancement register at 1321130206a6SUlf Hansson * 261 bytes offset. 1322130206a6SUlf Hansson */ 1323130206a6SUlf Hansson fno = card->ext_perf.fno; 1324130206a6SUlf Hansson page = card->ext_perf.page; 1325130206a6SUlf Hansson offset = card->ext_perf.offset + 261; 1326130206a6SUlf Hansson 1327130206a6SUlf Hansson err = sd_write_ext_reg(card, fno, page, offset, BIT(0)); 1328130206a6SUlf Hansson if (err) { 1329130206a6SUlf Hansson pr_warn("%s: error %d writing Cache Flush bit\n", 1330130206a6SUlf Hansson mmc_hostname(host), err); 1331130206a6SUlf Hansson goto out; 1332130206a6SUlf Hansson } 1333130206a6SUlf Hansson 1334130206a6SUlf Hansson err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false, 1335130206a6SUlf Hansson MMC_BUSY_EXTR_SINGLE); 1336130206a6SUlf Hansson if (err) 1337130206a6SUlf Hansson goto out; 1338130206a6SUlf Hansson 1339130206a6SUlf Hansson /* 1340130206a6SUlf Hansson * Read the Flush Cache bit. The card shall reset it, to confirm that 1341130206a6SUlf Hansson * it's has completed the flushing of the cache. 1342130206a6SUlf Hansson */ 1343130206a6SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 1, reg_buf); 1344130206a6SUlf Hansson if (err) { 1345130206a6SUlf Hansson pr_warn("%s: error %d reading Cache Flush bit\n", 1346130206a6SUlf Hansson mmc_hostname(host), err); 1347130206a6SUlf Hansson goto out; 1348130206a6SUlf Hansson } 1349130206a6SUlf Hansson 1350130206a6SUlf Hansson if (reg_buf[0] & BIT(0)) 1351130206a6SUlf Hansson err = -ETIMEDOUT; 1352130206a6SUlf Hansson out: 1353130206a6SUlf Hansson kfree(reg_buf); 1354130206a6SUlf Hansson return err; 1355130206a6SUlf Hansson } 1356130206a6SUlf Hansson 1357130206a6SUlf Hansson static int sd_enable_cache(struct mmc_card *card) 1358130206a6SUlf Hansson { 1359130206a6SUlf Hansson u8 *reg_buf; 1360130206a6SUlf Hansson int err; 1361130206a6SUlf Hansson 1362130206a6SUlf Hansson card->ext_perf.feature_enabled &= ~SD_EXT_PERF_CACHE; 1363130206a6SUlf Hansson 1364130206a6SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 1365130206a6SUlf Hansson if (!reg_buf) 1366130206a6SUlf Hansson return -ENOMEM; 1367130206a6SUlf Hansson 1368130206a6SUlf Hansson /* 1369130206a6SUlf Hansson * Set Cache Enable at bit 0 in the performance enhancement register at 1370130206a6SUlf Hansson * 260 bytes offset. 1371130206a6SUlf Hansson */ 1372130206a6SUlf Hansson err = sd_write_ext_reg(card, card->ext_perf.fno, card->ext_perf.page, 1373130206a6SUlf Hansson card->ext_perf.offset + 260, BIT(0)); 1374130206a6SUlf Hansson if (err) { 1375130206a6SUlf Hansson pr_warn("%s: error %d writing Cache Enable bit\n", 1376130206a6SUlf Hansson mmc_hostname(card->host), err); 1377130206a6SUlf Hansson goto out; 1378130206a6SUlf Hansson } 1379130206a6SUlf Hansson 1380130206a6SUlf Hansson err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false, 1381130206a6SUlf Hansson MMC_BUSY_EXTR_SINGLE); 1382130206a6SUlf Hansson if (!err) 1383130206a6SUlf Hansson card->ext_perf.feature_enabled |= SD_EXT_PERF_CACHE; 1384130206a6SUlf Hansson 1385130206a6SUlf Hansson out: 1386130206a6SUlf Hansson kfree(reg_buf); 1387130206a6SUlf Hansson return err; 1388130206a6SUlf Hansson } 1389130206a6SUlf Hansson 139071578a1eSMichal Miroslaw /* 139171578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 139271578a1eSMichal Miroslaw * 139371578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 139471578a1eSMichal Miroslaw * we're trying to reinitialise. 139571578a1eSMichal Miroslaw */ 139671578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 139771578a1eSMichal Miroslaw struct mmc_card *oldcard) 139871578a1eSMichal Miroslaw { 139971578a1eSMichal Miroslaw struct mmc_card *card; 140071578a1eSMichal Miroslaw int err; 140171578a1eSMichal Miroslaw u32 cid[4]; 1402d6d50a15SArindam Nath u32 rocr = 0; 14036a11fc47SAdrian Hunter bool v18_fixup_failed = false; 140471578a1eSMichal Miroslaw 140571578a1eSMichal Miroslaw WARN_ON(!host->claimed); 14066a11fc47SAdrian Hunter retry: 1407d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 140871578a1eSMichal Miroslaw if (err) 140971578a1eSMichal Miroslaw return err; 141071578a1eSMichal Miroslaw 141171578a1eSMichal Miroslaw if (oldcard) { 1412099b6481Shongjiefang if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 1413099b6481Shongjiefang pr_debug("%s: Perhaps the card was replaced\n", 1414099b6481Shongjiefang mmc_hostname(host)); 141571578a1eSMichal Miroslaw return -ENOENT; 1416099b6481Shongjiefang } 141771578a1eSMichal Miroslaw 141871578a1eSMichal Miroslaw card = oldcard; 141971578a1eSMichal Miroslaw } else { 142071578a1eSMichal Miroslaw /* 142171578a1eSMichal Miroslaw * Allocate card structure. 142271578a1eSMichal Miroslaw */ 142371578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 142471578a1eSMichal Miroslaw if (IS_ERR(card)) 142571578a1eSMichal Miroslaw return PTR_ERR(card); 142671578a1eSMichal Miroslaw 142769041150SUlf Hansson card->ocr = ocr; 142871578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 142971578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 143071578a1eSMichal Miroslaw } 143171578a1eSMichal Miroslaw 143271578a1eSMichal Miroslaw /* 1433eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 1434eac86321SDoug Anderson */ 1435eac86321SDoug Anderson if (host->ops->init_card) 1436eac86321SDoug Anderson host->ops->init_card(host, card); 1437eac86321SDoug Anderson 1438eac86321SDoug Anderson /* 143971578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 144071578a1eSMichal Miroslaw */ 144171578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 144271578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 144371578a1eSMichal Miroslaw if (err) 14447fca9675SWei WANG goto free_card; 144571578a1eSMichal Miroslaw } 144671578a1eSMichal Miroslaw 144771578a1eSMichal Miroslaw if (!oldcard) { 1448bd7342feSYue Hu err = mmc_sd_get_csd(card); 144971578a1eSMichal Miroslaw if (err) 14507fca9675SWei WANG goto free_card; 145171578a1eSMichal Miroslaw 145271578a1eSMichal Miroslaw mmc_decode_cid(card); 145371578a1eSMichal Miroslaw } 145471578a1eSMichal Miroslaw 145571578a1eSMichal Miroslaw /* 14563d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 14573d705d14SSascha Hauer * DSR configuration 14583d705d14SSascha Hauer */ 14593d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 14603d705d14SSascha Hauer mmc_set_dsr(host); 14613d705d14SSascha Hauer 14623d705d14SSascha Hauer /* 146371578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 146471578a1eSMichal Miroslaw */ 146571578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 146671578a1eSMichal Miroslaw err = mmc_select_card(card); 146771578a1eSMichal Miroslaw if (err) 14687fca9675SWei WANG goto free_card; 146971578a1eSMichal Miroslaw } 147071578a1eSMichal Miroslaw 147171578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 147271578a1eSMichal Miroslaw if (err) 147371578a1eSMichal Miroslaw goto free_card; 147471578a1eSMichal Miroslaw 14756a11fc47SAdrian Hunter /* 14766a11fc47SAdrian Hunter * If the card has not been power cycled, it may still be using 1.8V 14776a11fc47SAdrian Hunter * signaling. Detect that situation and try to initialize a UHS-I (1.8V) 14786a11fc47SAdrian Hunter * transfer mode. 14796a11fc47SAdrian Hunter */ 14806a11fc47SAdrian Hunter if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) && 14816a11fc47SAdrian Hunter mmc_sd_card_using_v18(card) && 14826a11fc47SAdrian Hunter host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) { 14836a11fc47SAdrian Hunter /* 14846a11fc47SAdrian Hunter * Re-read switch information in case it has changed since 14856a11fc47SAdrian Hunter * oldcard was initialized. 14866a11fc47SAdrian Hunter */ 14876a11fc47SAdrian Hunter if (oldcard) { 14886a11fc47SAdrian Hunter err = mmc_read_switch(card); 14896a11fc47SAdrian Hunter if (err) 14906a11fc47SAdrian Hunter goto free_card; 14916a11fc47SAdrian Hunter } 14926a11fc47SAdrian Hunter if (mmc_sd_card_using_v18(card)) { 14936a11fc47SAdrian Hunter if (mmc_host_set_uhs_voltage(host) || 14946a11fc47SAdrian Hunter mmc_sd_init_uhs_card(card)) { 14956a11fc47SAdrian Hunter v18_fixup_failed = true; 14966a11fc47SAdrian Hunter mmc_power_cycle(host, ocr); 14976a11fc47SAdrian Hunter if (!oldcard) 14986a11fc47SAdrian Hunter mmc_remove_card(card); 14996a11fc47SAdrian Hunter goto retry; 15006a11fc47SAdrian Hunter } 15016a11fc47SAdrian Hunter goto done; 15026a11fc47SAdrian Hunter } 15036a11fc47SAdrian Hunter } 15046a11fc47SAdrian Hunter 1505d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 1506d6743a8aSShawn Lin if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) { 1507d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 1508d6d50a15SArindam Nath if (err) 1509d6d50a15SArindam Nath goto free_card; 1510d6d50a15SArindam Nath } else { 151171578a1eSMichal Miroslaw /* 151271578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 151371578a1eSMichal Miroslaw */ 151471578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 151571578a1eSMichal Miroslaw if (err > 0) 1516cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS); 151771578a1eSMichal Miroslaw else if (err) 151871578a1eSMichal Miroslaw goto free_card; 151971578a1eSMichal Miroslaw 152071578a1eSMichal Miroslaw /* 152171578a1eSMichal Miroslaw * Set bus speed. 152271578a1eSMichal Miroslaw */ 152371578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 15246abaa0c9SPierre Ossman 15256abaa0c9SPierre Ossman /* 15266abaa0c9SPierre Ossman * Switch to wider bus (if supported). 15276abaa0c9SPierre Ossman */ 152871651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 15296abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 15306abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 153117b0429dSPierre Ossman if (err) 15326abaa0c9SPierre Ossman goto free_card; 15336abaa0c9SPierre Ossman 15346abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 15356abaa0c9SPierre Ossman } 1536d6d50a15SArindam Nath } 1537247cfe53SKyle Roeschley 1538c784f927SUlf Hansson if (!oldcard) { 1539c784f927SUlf Hansson /* Read/parse the extension registers. */ 1540c784f927SUlf Hansson err = sd_read_ext_regs(card); 1541c784f927SUlf Hansson if (err) 1542c784f927SUlf Hansson goto free_card; 1543c784f927SUlf Hansson } 1544c784f927SUlf Hansson 1545130206a6SUlf Hansson /* Enable internal SD cache if supported. */ 1546130206a6SUlf Hansson if (card->ext_perf.feature_support & SD_EXT_PERF_CACHE) { 1547130206a6SUlf Hansson err = sd_enable_cache(card); 1548130206a6SUlf Hansson if (err) 1549130206a6SUlf Hansson goto free_card; 1550130206a6SUlf Hansson } 1551130206a6SUlf Hansson 1552045d705dSBaolin Wang if (host->cqe_ops && !host->cqe_enabled) { 1553045d705dSBaolin Wang err = host->cqe_ops->cqe_enable(host, card); 1554045d705dSBaolin Wang if (!err) { 1555045d705dSBaolin Wang host->cqe_enabled = true; 1556045d705dSBaolin Wang host->hsq_enabled = true; 1557045d705dSBaolin Wang pr_info("%s: Host Software Queue enabled\n", 1558045d705dSBaolin Wang mmc_hostname(host)); 1559045d705dSBaolin Wang } 1560045d705dSBaolin Wang } 1561045d705dSBaolin Wang 1562247cfe53SKyle Roeschley if (host->caps2 & MMC_CAP2_AVOID_3_3V && 1563247cfe53SKyle Roeschley host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { 1564247cfe53SKyle Roeschley pr_err("%s: Host failed to negotiate down from 3.3V\n", 1565247cfe53SKyle Roeschley mmc_hostname(host)); 1566247cfe53SKyle Roeschley err = -EINVAL; 1567247cfe53SKyle Roeschley goto free_card; 1568247cfe53SKyle Roeschley } 15696a11fc47SAdrian Hunter done: 15706abaa0c9SPierre Ossman host->card = card; 157117b0429dSPierre Ossman return 0; 15726abaa0c9SPierre Ossman 15736abaa0c9SPierre Ossman free_card: 15746abaa0c9SPierre Ossman if (!oldcard) 15756abaa0c9SPierre Ossman mmc_remove_card(card); 15766abaa0c9SPierre Ossman 1577adf66a0dSPierre Ossman return err; 15786abaa0c9SPierre Ossman } 15796abaa0c9SPierre Ossman 15806abaa0c9SPierre Ossman /* 15817ea239d9SPierre Ossman * Host is being removed. Free up the current card. 15827ea239d9SPierre Ossman */ 15837ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 15847ea239d9SPierre Ossman { 15857ea239d9SPierre Ossman mmc_remove_card(host->card); 15867ea239d9SPierre Ossman host->card = NULL; 15877ea239d9SPierre Ossman } 15887ea239d9SPierre Ossman 15897ea239d9SPierre Ossman /* 1590d3049504SAdrian Hunter * Card detection - card is alive. 1591d3049504SAdrian Hunter */ 1592d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1593d3049504SAdrian Hunter { 1594d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1595d3049504SAdrian Hunter } 1596d3049504SAdrian Hunter 1597d3049504SAdrian Hunter /* 15987ea239d9SPierre Ossman * Card detection callback from host. 15997ea239d9SPierre Ossman */ 16007ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 16017ea239d9SPierre Ossman { 16027ea239d9SPierre Ossman int err; 16037ea239d9SPierre Ossman 16046c0cedd1SAdrian Hunter mmc_get_card(host->card, NULL); 16057ea239d9SPierre Ossman 16067ea239d9SPierre Ossman /* 16077ea239d9SPierre Ossman * Just check if our card has been removed. 16087ea239d9SPierre Ossman */ 1609d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 16107ea239d9SPierre Ossman 16116c0cedd1SAdrian Hunter mmc_put_card(host->card, NULL); 16127ea239d9SPierre Ossman 161317b0429dSPierre Ossman if (err) { 16144101c16aSPierre Ossman mmc_sd_remove(host); 16157ea239d9SPierre Ossman 16167ea239d9SPierre Ossman mmc_claim_host(host); 16177ea239d9SPierre Ossman mmc_detach_bus(host); 16187f7e4129SUlf Hansson mmc_power_off(host); 16197ea239d9SPierre Ossman mmc_release_host(host); 16207ea239d9SPierre Ossman } 16217ea239d9SPierre Ossman } 16227ea239d9SPierre Ossman 16232c5d4276SUlf Hansson static int sd_can_poweroff_notify(struct mmc_card *card) 16242c5d4276SUlf Hansson { 16252c5d4276SUlf Hansson return card->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY; 16262c5d4276SUlf Hansson } 16272c5d4276SUlf Hansson 16282c5d4276SUlf Hansson static int sd_busy_poweroff_notify_cb(void *cb_data, bool *busy) 16292c5d4276SUlf Hansson { 16302c5d4276SUlf Hansson struct sd_busy_data *data = cb_data; 16312c5d4276SUlf Hansson struct mmc_card *card = data->card; 16322c5d4276SUlf Hansson int err; 16332c5d4276SUlf Hansson 16342c5d4276SUlf Hansson /* 16352c5d4276SUlf Hansson * Read the status register for the power management function. It's at 16362c5d4276SUlf Hansson * one byte offset and is one byte long. The Power Off Notification 16372c5d4276SUlf Hansson * Ready is bit 0. 16382c5d4276SUlf Hansson */ 16392c5d4276SUlf Hansson err = sd_read_ext_reg(card, card->ext_power.fno, card->ext_power.page, 16402c5d4276SUlf Hansson card->ext_power.offset + 1, 1, data->reg_buf); 16412c5d4276SUlf Hansson if (err) { 16422c5d4276SUlf Hansson pr_warn("%s: error %d reading status reg of PM func\n", 16432c5d4276SUlf Hansson mmc_hostname(card->host), err); 16442c5d4276SUlf Hansson return err; 16452c5d4276SUlf Hansson } 16462c5d4276SUlf Hansson 16472c5d4276SUlf Hansson *busy = !(data->reg_buf[0] & BIT(0)); 16482c5d4276SUlf Hansson return 0; 16492c5d4276SUlf Hansson } 16502c5d4276SUlf Hansson 16512c5d4276SUlf Hansson static int sd_poweroff_notify(struct mmc_card *card) 16522c5d4276SUlf Hansson { 16532c5d4276SUlf Hansson struct sd_busy_data cb_data; 16542c5d4276SUlf Hansson u8 *reg_buf; 16552c5d4276SUlf Hansson int err; 16562c5d4276SUlf Hansson 16572c5d4276SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL); 16582c5d4276SUlf Hansson if (!reg_buf) 16592c5d4276SUlf Hansson return -ENOMEM; 16602c5d4276SUlf Hansson 16612c5d4276SUlf Hansson /* 16622c5d4276SUlf Hansson * Set the Power Off Notification bit in the power management settings 16632c5d4276SUlf Hansson * register at 2 bytes offset. 16642c5d4276SUlf Hansson */ 16652c5d4276SUlf Hansson err = sd_write_ext_reg(card, card->ext_power.fno, card->ext_power.page, 16662c5d4276SUlf Hansson card->ext_power.offset + 2, BIT(0)); 16672c5d4276SUlf Hansson if (err) { 16682c5d4276SUlf Hansson pr_warn("%s: error %d writing Power Off Notify bit\n", 16692c5d4276SUlf Hansson mmc_hostname(card->host), err); 16702c5d4276SUlf Hansson goto out; 16712c5d4276SUlf Hansson } 16722c5d4276SUlf Hansson 1673379f56c2SAndrey Skvortsov /* Find out when the command is completed. */ 1674379f56c2SAndrey Skvortsov err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false, 1675379f56c2SAndrey Skvortsov MMC_BUSY_EXTR_SINGLE); 1676379f56c2SAndrey Skvortsov if (err) 1677379f56c2SAndrey Skvortsov goto out; 1678379f56c2SAndrey Skvortsov 16792c5d4276SUlf Hansson cb_data.card = card; 16802c5d4276SUlf Hansson cb_data.reg_buf = reg_buf; 16811760fdb6SUlf Hansson err = __mmc_poll_for_busy(card->host, 0, SD_POWEROFF_NOTIFY_TIMEOUT_MS, 16822c5d4276SUlf Hansson &sd_busy_poweroff_notify_cb, &cb_data); 16832c5d4276SUlf Hansson 16842c5d4276SUlf Hansson out: 16852c5d4276SUlf Hansson kfree(reg_buf); 16862c5d4276SUlf Hansson return err; 16872c5d4276SUlf Hansson } 16882c5d4276SUlf Hansson 16890cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 16906abaa0c9SPierre Ossman { 16912c5d4276SUlf Hansson struct mmc_card *card = host->card; 169285e727edSJaehoon Chung int err = 0; 169385e727edSJaehoon Chung 16946abaa0c9SPierre Ossman mmc_claim_host(host); 16959ec775f7SUlf Hansson 16962c5d4276SUlf Hansson if (mmc_card_suspended(card)) 16979ec775f7SUlf Hansson goto out; 16989ec775f7SUlf Hansson 16992c5d4276SUlf Hansson if (sd_can_poweroff_notify(card)) 17002c5d4276SUlf Hansson err = sd_poweroff_notify(card); 17012c5d4276SUlf Hansson else if (!mmc_host_is_spi(host)) 170285e727edSJaehoon Chung err = mmc_deselect_cards(host); 1703cdc99179SSeungwon Jeon 17049ec775f7SUlf Hansson if (!err) { 170574590263SUlf Hansson mmc_power_off(host); 17062c5d4276SUlf Hansson mmc_card_set_suspended(card); 17079ec775f7SUlf Hansson } 170895cdfb72SNicolas Pitre 17099ec775f7SUlf Hansson out: 17109ec775f7SUlf Hansson mmc_release_host(host); 171185e727edSJaehoon Chung return err; 17126abaa0c9SPierre Ossman } 17136abaa0c9SPierre Ossman 17146abaa0c9SPierre Ossman /* 17150cb403a2SUlf Hansson * Callback for suspend 17160cb403a2SUlf Hansson */ 17170cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 17180cb403a2SUlf Hansson { 17190cb403a2SUlf Hansson int err; 17200cb403a2SUlf Hansson 17210cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 17220cb403a2SUlf Hansson if (!err) { 17230cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 17240cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 17250cb403a2SUlf Hansson } 17260cb403a2SUlf Hansson 17270cb403a2SUlf Hansson return err; 17280cb403a2SUlf Hansson } 17290cb403a2SUlf Hansson 17300cb403a2SUlf Hansson /* 17316abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 17326abaa0c9SPierre Ossman * and, if so, restore all state to it. 17336abaa0c9SPierre Ossman */ 17340cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 17356abaa0c9SPierre Ossman { 17369ec775f7SUlf Hansson int err = 0; 17376abaa0c9SPierre Ossman 17386abaa0c9SPierre Ossman mmc_claim_host(host); 17399ec775f7SUlf Hansson 17409ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 17419ec775f7SUlf Hansson goto out; 17429ec775f7SUlf Hansson 174369041150SUlf Hansson mmc_power_up(host, host->card->ocr); 174469041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 17459ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 17462986d0bfSPierre Ossman 17479ec775f7SUlf Hansson out: 17489ec775f7SUlf Hansson mmc_release_host(host); 174995cdfb72SNicolas Pitre return err; 17506abaa0c9SPierre Ossman } 17516abaa0c9SPierre Ossman 1752c4d770d7SUlf Hansson /* 17530cb403a2SUlf Hansson * Callback for resume 17540cb403a2SUlf Hansson */ 17550cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 17560cb403a2SUlf Hansson { 17570cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 1758c29536e8SUlf Hansson return 0; 17590cb403a2SUlf Hansson } 17600cb403a2SUlf Hansson 17610cb403a2SUlf Hansson /* 1762c4d770d7SUlf Hansson * Callback for runtime_suspend. 1763c4d770d7SUlf Hansson */ 1764c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1765c4d770d7SUlf Hansson { 1766c4d770d7SUlf Hansson int err; 1767c4d770d7SUlf Hansson 1768c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1769c4d770d7SUlf Hansson return 0; 1770c4d770d7SUlf Hansson 17710cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 17720cc81a8cSUlf Hansson if (err) 1773f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n", 1774c4d770d7SUlf Hansson mmc_hostname(host), err); 1775c4d770d7SUlf Hansson 1776c4d770d7SUlf Hansson return err; 1777c4d770d7SUlf Hansson } 1778c4d770d7SUlf Hansson 1779c4d770d7SUlf Hansson /* 1780c4d770d7SUlf Hansson * Callback for runtime_resume. 1781c4d770d7SUlf Hansson */ 1782c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1783c4d770d7SUlf Hansson { 1784c4d770d7SUlf Hansson int err; 1785c4d770d7SUlf Hansson 17860cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1787520322d9SAdrian Hunter if (err && err != -ENOMEDIUM) 1788c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n", 1789c4d770d7SUlf Hansson mmc_hostname(host), err); 1790c4d770d7SUlf Hansson 1791c4d770d7SUlf Hansson return 0; 1792c4d770d7SUlf Hansson } 1793c4d770d7SUlf Hansson 17943a3db603SUlf Hansson static int mmc_sd_hw_reset(struct mmc_host *host) 1795dc0ecfefSJohan Rudholm { 1796dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr); 17973056c49cSUlf Hansson return mmc_sd_init_card(host, host->card->ocr, host->card); 1798dc0ecfefSJohan Rudholm } 1799dc0ecfefSJohan Rudholm 18009feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 18019feae246SAdrian Hunter .remove = mmc_sd_remove, 18029feae246SAdrian Hunter .detect = mmc_sd_detect, 1803c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1804c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 18059feae246SAdrian Hunter .suspend = mmc_sd_suspend, 18069feae246SAdrian Hunter .resume = mmc_sd_resume, 1807d3049504SAdrian Hunter .alive = mmc_sd_alive, 18085992e786SUlf Hansson .shutdown = mmc_sd_suspend, 18093a3db603SUlf Hansson .hw_reset = mmc_sd_hw_reset, 1810130206a6SUlf Hansson .cache_enabled = sd_cache_enabled, 1811130206a6SUlf Hansson .flush_cache = sd_flush_cache, 18129feae246SAdrian Hunter }; 18139feae246SAdrian Hunter 18147ea239d9SPierre Ossman /* 18157ea239d9SPierre Ossman * Starting point for SD card init. 18167ea239d9SPierre Ossman */ 1817807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 18187ea239d9SPierre Ossman { 18197ea239d9SPierre Ossman int err; 182069041150SUlf Hansson u32 ocr, rocr; 18217ea239d9SPierre Ossman 1822d84075c8SPierre Ossman WARN_ON(!host->claimed); 18237ea239d9SPierre Ossman 1824807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1825807e8e40SAndy Ross if (err) 1826807e8e40SAndy Ross return err; 1827807e8e40SAndy Ross 18282501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops); 18298f230f45STakashi Iwai if (host->ocr_avail_sd) 18308f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 18317ea239d9SPierre Ossman 183255556da0SPhilip Langdale /* 1833af517150SDavid Brownell * We need to get OCR a different way for SPI. 1834af517150SDavid Brownell */ 1835af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1836af517150SDavid Brownell mmc_go_idle(host); 1837af517150SDavid Brownell 1838af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1839af517150SDavid Brownell if (err) 1840af517150SDavid Brownell goto err; 1841af517150SDavid Brownell } 1842af517150SDavid Brownell 184372741084SUlf Hansson /* 184472741084SUlf Hansson * Some SD cards claims an out of spec VDD voltage range. Let's treat 184572741084SUlf Hansson * these bits as being in-valid and especially also bit7. 184672741084SUlf Hansson */ 184772741084SUlf Hansson ocr &= ~0x7FFF; 184872741084SUlf Hansson 184969041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 18507ea239d9SPierre Ossman 18517ea239d9SPierre Ossman /* 18527ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 18537ea239d9SPierre Ossman */ 185469041150SUlf Hansson if (!rocr) { 1855109b5bedSPierre Ossman err = -EINVAL; 18567ea239d9SPierre Ossman goto err; 1857109b5bedSPierre Ossman } 18587ea239d9SPierre Ossman 18597ea239d9SPierre Ossman /* 18606abaa0c9SPierre Ossman * Detect and init the card. 18617ea239d9SPierre Ossman */ 186269041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 186317b0429dSPierre Ossman if (err) 18647ea239d9SPierre Ossman goto err; 18657ea239d9SPierre Ossman 18667ea239d9SPierre Ossman mmc_release_host(host); 18674101c16aSPierre Ossman err = mmc_add_card(host->card); 18687ea239d9SPierre Ossman if (err) 18692986d0bfSPierre Ossman goto remove_card; 18707ea239d9SPierre Ossman 18712860d060SSergei Shtylyov mmc_claim_host(host); 18727ea239d9SPierre Ossman return 0; 18737ea239d9SPierre Ossman 18742986d0bfSPierre Ossman remove_card: 18756abaa0c9SPierre Ossman mmc_remove_card(host->card); 18767ea239d9SPierre Ossman host->card = NULL; 18772986d0bfSPierre Ossman mmc_claim_host(host); 18787ea239d9SPierre Ossman err: 18797ea239d9SPierre Ossman mmc_detach_bus(host); 18807ea239d9SPierre Ossman 1881a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1882109b5bedSPierre Ossman mmc_hostname(host), err); 1883109b5bedSPierre Ossman 1884adf66a0dSPierre Ossman return err; 18857ea239d9SPierre Ossman } 1886