17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/sd.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 67ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 77ea239d9SPierre Ossman * 87ea239d9SPierre Ossman * This program is free software; you can redistribute it and/or modify 97ea239d9SPierre Ossman * it under the terms of the GNU General Public License version 2 as 107ea239d9SPierre Ossman * published by the Free Software Foundation. 117ea239d9SPierre Ossman */ 127ea239d9SPierre Ossman 137ea239d9SPierre Ossman #include <linux/err.h> 149288cac0SWolfram Sang #include <linux/sizes.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 160205a904SPaul Gortmaker #include <linux/stat.h> 170cb403a2SUlf Hansson #include <linux/pm_runtime.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include <linux/mmc/host.h> 207ea239d9SPierre Ossman #include <linux/mmc/card.h> 217ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 223373c0aeSPierre Ossman #include <linux/mmc/sd.h> 237ea239d9SPierre Ossman 247ea239d9SPierre Ossman #include "core.h" 254101c16aSPierre Ossman #include "bus.h" 267ea239d9SPierre Ossman #include "mmc_ops.h" 27ce101496SMark Brown #include "sd.h" 287ea239d9SPierre Ossman #include "sd_ops.h" 297ea239d9SPierre Ossman 307ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 317ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 327ea239d9SPierre Ossman 0, 0, 0, 0 337ea239d9SPierre Ossman }; 347ea239d9SPierre Ossman 357ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 367ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 377ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 387ea239d9SPierre Ossman }; 397ea239d9SPierre Ossman 407ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 417ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 427ea239d9SPierre Ossman }; 437ea239d9SPierre Ossman 447ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 457ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 467ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 477ea239d9SPierre Ossman }; 487ea239d9SPierre Ossman 499288cac0SWolfram Sang static const unsigned int sd_au_size[] = { 509288cac0SWolfram Sang 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, 519288cac0SWolfram Sang SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, 529288cac0SWolfram Sang SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, 539288cac0SWolfram Sang SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, 549288cac0SWolfram Sang }; 559288cac0SWolfram Sang 567ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 577ea239d9SPierre Ossman ({ \ 587ea239d9SPierre Ossman const int __size = size; \ 597ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 607ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 617ea239d9SPierre Ossman const int __shft = (start) & 31; \ 627ea239d9SPierre Ossman u32 __res; \ 637ea239d9SPierre Ossman \ 647ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 657ea239d9SPierre Ossman if (__size + __shft > 32) \ 667ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 677ea239d9SPierre Ossman __res & __mask; \ 687ea239d9SPierre Ossman }) 697ea239d9SPierre Ossman 707ea239d9SPierre Ossman /* 717ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 727ea239d9SPierre Ossman */ 7371578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 747ea239d9SPierre Ossman { 757ea239d9SPierre Ossman u32 *resp = card->raw_cid; 767ea239d9SPierre Ossman 777ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 787ea239d9SPierre Ossman 797ea239d9SPierre Ossman /* 807ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 817ea239d9SPierre Ossman * have to assume we can parse this. 827ea239d9SPierre Ossman */ 837ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 847ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 857ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 867ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 877ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 887ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 897ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 907ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 917ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 927ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 937ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 947ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 957ea239d9SPierre Ossman 967ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 977ea239d9SPierre Ossman } 987ea239d9SPierre Ossman 997ea239d9SPierre Ossman /* 1007ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1017ea239d9SPierre Ossman */ 102bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1037ea239d9SPierre Ossman { 1047ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1057ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1067ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1077ea239d9SPierre Ossman 1087ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1097ea239d9SPierre Ossman 1107ea239d9SPierre Ossman switch (csd_struct) { 1117ea239d9SPierre Ossman case 0: 1127ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1137ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1147ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1157ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1167ea239d9SPierre Ossman 1177ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1187ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1197ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1207ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1217ea239d9SPierre Ossman 1227ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1237ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1247ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1257ea239d9SPierre Ossman 1267ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1277ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1287ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1297ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1303d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); 1317ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1327ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1337ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 134dfe86cbaSAdrian Hunter 135dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 136dfe86cbaSAdrian Hunter csd->erase_size = 1; 137dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) { 138dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 139dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 140dfe86cbaSAdrian Hunter } 1417ea239d9SPierre Ossman break; 1427ea239d9SPierre Ossman case 1: 1437ea239d9SPierre Ossman /* 1443a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most 1457ea239d9SPierre Ossman * interesting fields are unused and have fixed 1467ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1477ea239d9SPierre Ossman * we assume those fixed values ourselves. 1487ea239d9SPierre Ossman */ 1497ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1507ea239d9SPierre Ossman 1517ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1527ea239d9SPierre Ossman csd->tacc_clks = 0; /* Unused */ 1537ea239d9SPierre Ossman 1547ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1557ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1567ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1577ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1583a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22); 1593a303511SArindam Nath 1603a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ 1613a303511SArindam Nath if (csd->c_size >= 0xFFFF) 1623a303511SArindam Nath mmc_card_set_ext_capacity(card); 1637ea239d9SPierre Ossman 1647ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1657ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1667ea239d9SPierre Ossman 1677ea239d9SPierre Ossman csd->read_blkbits = 9; 1687ea239d9SPierre Ossman csd->read_partial = 0; 1697ea239d9SPierre Ossman csd->write_misalign = 0; 1707ea239d9SPierre Ossman csd->read_misalign = 0; 1717ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1727ea239d9SPierre Ossman csd->write_blkbits = 9; 1737ea239d9SPierre Ossman csd->write_partial = 0; 174dfe86cbaSAdrian Hunter csd->erase_size = 1; 1757ea239d9SPierre Ossman break; 1767ea239d9SPierre Ossman default: 177a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1787ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 179bd766312SPierre Ossman return -EINVAL; 1807ea239d9SPierre Ossman } 181bd766312SPierre Ossman 182dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size; 183dfe86cbaSAdrian Hunter 184bd766312SPierre Ossman return 0; 1857ea239d9SPierre Ossman } 1867ea239d9SPierre Ossman 1877ea239d9SPierre Ossman /* 1887ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1897ea239d9SPierre Ossman */ 190bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1917ea239d9SPierre Ossman { 1927ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1937ea239d9SPierre Ossman unsigned int scr_struct; 1947ea239d9SPierre Ossman u32 resp[4]; 1957ea239d9SPierre Ossman 1967ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1977ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1987ea239d9SPierre Ossman 1997ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 2007ea239d9SPierre Ossman if (scr_struct != 0) { 201a3c76eb9SGirish K S pr_err("%s: unrecognised SCR structure version %d\n", 2027ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 203bd766312SPierre Ossman return -EINVAL; 2047ea239d9SPierre Ossman } 2057ea239d9SPierre Ossman 2067ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 2077ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 208013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2) 209013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */ 210013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); 211bd766312SPierre Ossman 212dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 213dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 214dfe86cbaSAdrian Hunter else 215dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 216dfe86cbaSAdrian Hunter 217f0d89972SAndrei Warkentin if (scr->sda_spec3) 218f0d89972SAndrei Warkentin scr->cmds = UNSTUFF_BITS(resp, 32, 2); 219bd766312SPierre Ossman return 0; 2207ea239d9SPierre Ossman } 2217ea239d9SPierre Ossman 2227ea239d9SPierre Ossman /* 223dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 224dfe86cbaSAdrian Hunter */ 225dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card) 226dfe86cbaSAdrian Hunter { 227dfe86cbaSAdrian Hunter unsigned int au, es, et, eo; 2289288cac0SWolfram Sang int err, i; 229dfe86cbaSAdrian Hunter u32 *ssr; 230dfe86cbaSAdrian Hunter 231dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 2326606110dSJoe Perches pr_warn("%s: card lacks mandatory SD Status function\n", 2336606110dSJoe Perches mmc_hostname(card->host)); 234dfe86cbaSAdrian Hunter return 0; 235dfe86cbaSAdrian Hunter } 236dfe86cbaSAdrian Hunter 237dfe86cbaSAdrian Hunter ssr = kmalloc(64, GFP_KERNEL); 238dfe86cbaSAdrian Hunter if (!ssr) 239dfe86cbaSAdrian Hunter return -ENOMEM; 240dfe86cbaSAdrian Hunter 241dfe86cbaSAdrian Hunter err = mmc_app_sd_status(card, ssr); 242dfe86cbaSAdrian Hunter if (err) { 2436606110dSJoe Perches pr_warn("%s: problem reading SD Status register\n", 2446606110dSJoe Perches mmc_hostname(card->host)); 245dfe86cbaSAdrian Hunter err = 0; 246dfe86cbaSAdrian Hunter goto out; 247dfe86cbaSAdrian Hunter } 248dfe86cbaSAdrian Hunter 249dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 250dfe86cbaSAdrian Hunter ssr[i] = be32_to_cpu(ssr[i]); 251dfe86cbaSAdrian Hunter 252dfe86cbaSAdrian Hunter /* 253dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 254dfe86cbaSAdrian Hunter * bitfield positions accordingly. 255dfe86cbaSAdrian Hunter */ 256dfe86cbaSAdrian Hunter au = UNSTUFF_BITS(ssr, 428 - 384, 4); 2579288cac0SWolfram Sang if (au) { 2589288cac0SWolfram Sang if (au <= 9 || card->scr.sda_spec3) { 2599288cac0SWolfram Sang card->ssr.au = sd_au_size[au]; 260dfe86cbaSAdrian Hunter es = UNSTUFF_BITS(ssr, 408 - 384, 16); 261dfe86cbaSAdrian Hunter et = UNSTUFF_BITS(ssr, 402 - 384, 6); 262dfe86cbaSAdrian Hunter if (es && et) { 2639288cac0SWolfram Sang eo = UNSTUFF_BITS(ssr, 400 - 384, 2); 264dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 265dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 266dfe86cbaSAdrian Hunter } 267dfe86cbaSAdrian Hunter } else { 2686606110dSJoe Perches pr_warn("%s: SD Status: Invalid Allocation Unit size\n", 2699288cac0SWolfram Sang mmc_hostname(card->host)); 2709288cac0SWolfram Sang } 271dfe86cbaSAdrian Hunter } 272dfe86cbaSAdrian Hunter out: 273dfe86cbaSAdrian Hunter kfree(ssr); 274dfe86cbaSAdrian Hunter return err; 275dfe86cbaSAdrian Hunter } 276dfe86cbaSAdrian Hunter 277dfe86cbaSAdrian Hunter /* 2781addfcdbSPierre Ossman * Fetches and decodes switch information 2797ea239d9SPierre Ossman */ 2801addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 2817ea239d9SPierre Ossman { 2827ea239d9SPierre Ossman int err; 2837ea239d9SPierre Ossman u8 *status; 2847ea239d9SPierre Ossman 2853373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 28617b0429dSPierre Ossman return 0; 2873373c0aeSPierre Ossman 2883373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 2896606110dSJoe Perches pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", 2903373c0aeSPierre Ossman mmc_hostname(card->host)); 29117b0429dSPierre Ossman return 0; 2923373c0aeSPierre Ossman } 2933373c0aeSPierre Ossman 29417b0429dSPierre Ossman err = -EIO; 2957ea239d9SPierre Ossman 2967ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2977ea239d9SPierre Ossman if (!status) { 298a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 299013909c4SArindam Nath "switch capabilities.\n", 300013909c4SArindam Nath mmc_hostname(card->host)); 30117b0429dSPierre Ossman return -ENOMEM; 3027ea239d9SPierre Ossman } 3037ea239d9SPierre Ossman 304a39ca6aeSAaron Lu /* 305a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation. 306a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not 307a39ca6aeSAaron Lu * change with the arguments. 308a39ca6aeSAaron Lu */ 309a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status); 31017b0429dSPierre Ossman if (err) { 311013909c4SArindam Nath /* 312013909c4SArindam Nath * If the host or the card can't do the switch, 313013909c4SArindam Nath * fail more gracefully. 314013909c4SArindam Nath */ 315013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 316adf66a0dSPierre Ossman goto out; 317adf66a0dSPierre Ossman 3186606110dSJoe Perches pr_warn("%s: problem reading Bus Speed modes\n", 3193373c0aeSPierre Ossman mmc_hostname(card->host)); 32017b0429dSPierre Ossman err = 0; 321adf66a0dSPierre Ossman 3227ea239d9SPierre Ossman goto out; 3237ea239d9SPierre Ossman } 3247ea239d9SPierre Ossman 325fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED) 326fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; 327f2815f68SSubhash Jadavani 328013909c4SArindam Nath if (card->scr.sda_spec3) { 329013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 330a39ca6aeSAaron Lu /* Driver Strengths supported by the card */ 331013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 332013909c4SArindam Nath } 3337ea239d9SPierre Ossman 3341addfcdbSPierre Ossman out: 3351addfcdbSPierre Ossman kfree(status); 3361addfcdbSPierre Ossman 3371addfcdbSPierre Ossman return err; 3381addfcdbSPierre Ossman } 3391addfcdbSPierre Ossman 3401addfcdbSPierre Ossman /* 3411addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3421addfcdbSPierre Ossman */ 34371578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3441addfcdbSPierre Ossman { 3451addfcdbSPierre Ossman int err; 3461addfcdbSPierre Ossman u8 *status; 3471addfcdbSPierre Ossman 3483373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 34917b0429dSPierre Ossman return 0; 3503373c0aeSPierre Ossman 3513373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 35217b0429dSPierre Ossman return 0; 3533373c0aeSPierre Ossman 3541addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 35517b0429dSPierre Ossman return 0; 3561addfcdbSPierre Ossman 3571addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 35817b0429dSPierre Ossman return 0; 3591addfcdbSPierre Ossman 36017b0429dSPierre Ossman err = -EIO; 3611addfcdbSPierre Ossman 3621addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 3631addfcdbSPierre Ossman if (!status) { 364a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 365facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 36617b0429dSPierre Ossman return -ENOMEM; 3671addfcdbSPierre Ossman } 3681addfcdbSPierre Ossman 3697ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 37017b0429dSPierre Ossman if (err) 3717ea239d9SPierre Ossman goto out; 3727ea239d9SPierre Ossman 3737ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 3746606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n", 3757ea239d9SPierre Ossman mmc_hostname(card->host)); 37671578a1eSMichal Miroslaw err = 0; 3777ea239d9SPierre Ossman } else { 37871578a1eSMichal Miroslaw err = 1; 3797ea239d9SPierre Ossman } 3807ea239d9SPierre Ossman 3817ea239d9SPierre Ossman out: 3827ea239d9SPierre Ossman kfree(status); 3837ea239d9SPierre Ossman 3847ea239d9SPierre Ossman return err; 3857ea239d9SPierre Ossman } 3867ea239d9SPierre Ossman 387d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 388d6d50a15SArindam Nath { 389ca8e99b3SPhilip Rakity int host_drv_type = SD_DRIVER_TYPE_B; 390ca8e99b3SPhilip Rakity int card_drv_type = SD_DRIVER_TYPE_B; 391ca8e99b3SPhilip Rakity int drive_strength; 392d6d50a15SArindam Nath int err; 393d6d50a15SArindam Nath 394d6d50a15SArindam Nath /* 395d6d50a15SArindam Nath * If the host doesn't support any of the Driver Types A,C or D, 396ca8e99b3SPhilip Rakity * or there is no board specific handler then default Driver 397ca8e99b3SPhilip Rakity * Type B is used. 398d6d50a15SArindam Nath */ 399d6d50a15SArindam Nath if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C 400d6d50a15SArindam Nath | MMC_CAP_DRIVER_TYPE_D))) 401d6d50a15SArindam Nath return 0; 402d6d50a15SArindam Nath 403ca8e99b3SPhilip Rakity if (!card->host->ops->select_drive_strength) 404ca8e99b3SPhilip Rakity return 0; 405d6d50a15SArindam Nath 406ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) 407ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_A; 408ca8e99b3SPhilip Rakity 409ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) 410ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_C; 411ca8e99b3SPhilip Rakity 412ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) 413ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_D; 414ca8e99b3SPhilip Rakity 415ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) 416ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_A; 417ca8e99b3SPhilip Rakity 418ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) 419ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_C; 420ca8e99b3SPhilip Rakity 421ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) 422ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_D; 423ca8e99b3SPhilip Rakity 424ca8e99b3SPhilip Rakity /* 425ca8e99b3SPhilip Rakity * The drive strength that the hardware can support 426ca8e99b3SPhilip Rakity * depends on the board design. Pass the appropriate 427ca8e99b3SPhilip Rakity * information and let the hardware specific code 428ca8e99b3SPhilip Rakity * return what is possible given the options 429ca8e99b3SPhilip Rakity */ 4302c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 431ca8e99b3SPhilip Rakity drive_strength = card->host->ops->select_drive_strength( 432ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 433ca8e99b3SPhilip Rakity host_drv_type, card_drv_type); 4342c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 435ca8e99b3SPhilip Rakity 436ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 437d6d50a15SArindam Nath if (err) 438d6d50a15SArindam Nath return err; 439d6d50a15SArindam Nath 440ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 4416606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n", 442d6d50a15SArindam Nath mmc_hostname(card->host)); 443d6d50a15SArindam Nath return 0; 444d6d50a15SArindam Nath } 445d6d50a15SArindam Nath 446ca8e99b3SPhilip Rakity mmc_set_driver_type(card->host, drive_strength); 447d6d50a15SArindam Nath 448d6d50a15SArindam Nath return 0; 449d6d50a15SArindam Nath } 450d6d50a15SArindam Nath 45193c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 45249c468fcSArindam Nath { 45349c468fcSArindam Nath /* 45449c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 45549c468fcSArindam Nath * default speed. 45649c468fcSArindam Nath */ 4573f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 45893c712f9SSubhash Jadavani card->sd_bus_speed = 0; 45993c712f9SSubhash Jadavani return; 46093c712f9SSubhash Jadavani } 46149c468fcSArindam Nath 46249c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 46349c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 46493c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 46549c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 46649c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 46793c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 46849c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 46949c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 47049c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 47193c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 47249c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47349c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 47449c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 47593c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 47649c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47749c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 47849c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 47949c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 48093c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 48193c712f9SSubhash Jadavani } 48249c468fcSArindam Nath } 48349c468fcSArindam Nath 48493c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 48593c712f9SSubhash Jadavani { 48693c712f9SSubhash Jadavani int err; 48793c712f9SSubhash Jadavani unsigned int timing = 0; 48893c712f9SSubhash Jadavani 48993c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 49093c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 49193c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 49293c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 49393c712f9SSubhash Jadavani break; 49493c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 49593c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 49693c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 49793c712f9SSubhash Jadavani break; 49893c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 49993c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 50093c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 50193c712f9SSubhash Jadavani break; 50293c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 50393c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 50493c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 50593c712f9SSubhash Jadavani break; 50693c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 50793c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 50893c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 50993c712f9SSubhash Jadavani break; 51093c712f9SSubhash Jadavani default: 51193c712f9SSubhash Jadavani return 0; 51293c712f9SSubhash Jadavani } 51393c712f9SSubhash Jadavani 51493c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 51549c468fcSArindam Nath if (err) 51649c468fcSArindam Nath return err; 51749c468fcSArindam Nath 51893c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 5196606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n", 52049c468fcSArindam Nath mmc_hostname(card->host)); 52149c468fcSArindam Nath else { 52249c468fcSArindam Nath mmc_set_timing(card->host, timing); 52349c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 52449c468fcSArindam Nath } 52549c468fcSArindam Nath 52649c468fcSArindam Nath return 0; 52749c468fcSArindam Nath } 52849c468fcSArindam Nath 52955c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 53055c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 53155c4665eSAaron Lu { 53255c4665eSAaron Lu u32 voltage, max_current; 53355c4665eSAaron Lu 53455c4665eSAaron Lu voltage = 1 << host->ios.vdd; 53555c4665eSAaron Lu switch (voltage) { 53655c4665eSAaron Lu case MMC_VDD_165_195: 53755c4665eSAaron Lu max_current = host->max_current_180; 53855c4665eSAaron Lu break; 53955c4665eSAaron Lu case MMC_VDD_29_30: 54055c4665eSAaron Lu case MMC_VDD_30_31: 54155c4665eSAaron Lu max_current = host->max_current_300; 54255c4665eSAaron Lu break; 54355c4665eSAaron Lu case MMC_VDD_32_33: 54455c4665eSAaron Lu case MMC_VDD_33_34: 54555c4665eSAaron Lu max_current = host->max_current_330; 54655c4665eSAaron Lu break; 54755c4665eSAaron Lu default: 54855c4665eSAaron Lu max_current = 0; 54955c4665eSAaron Lu } 55055c4665eSAaron Lu 55155c4665eSAaron Lu return max_current; 55255c4665eSAaron Lu } 55355c4665eSAaron Lu 5545371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5555371c927SArindam Nath { 5560aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5575371c927SArindam Nath int err; 55855c4665eSAaron Lu u32 max_current; 5595371c927SArindam Nath 5605371c927SArindam Nath /* 5615371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5620aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5630aa67700SPhilip Rakity * current limit. 56455c4665eSAaron Lu */ 56555c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 56655c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 56755c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 56855c4665eSAaron Lu return 0; 56955c4665eSAaron Lu 57055c4665eSAaron Lu /* 57155c4665eSAaron Lu * Host has different current capabilities when operating at 57255c4665eSAaron Lu * different voltages, so find out its max current first. 57355c4665eSAaron Lu */ 57455c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 57555c4665eSAaron Lu 57655c4665eSAaron Lu /* 577a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 578a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 579a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 580a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 581a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 582a39ca6aeSAaron Lu * maximum 300ma from the host. 5835371c927SArindam Nath */ 58455c4665eSAaron Lu if (max_current >= 800) 5855371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 58655c4665eSAaron Lu else if (max_current >= 600) 5875371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 58855c4665eSAaron Lu else if (max_current >= 400) 5895371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 59055c4665eSAaron Lu else if (max_current >= 200) 5915371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5925371c927SArindam Nath 5930aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 5945371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5955371c927SArindam Nath if (err) 5965371c927SArindam Nath return err; 5975371c927SArindam Nath 5985371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 5996606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n", 6005371c927SArindam Nath mmc_hostname(card->host)); 6015371c927SArindam Nath 6020aa67700SPhilip Rakity } 603a39ca6aeSAaron Lu 6045371c927SArindam Nath return 0; 6055371c927SArindam Nath } 6065371c927SArindam Nath 607d6d50a15SArindam Nath /* 608d6d50a15SArindam Nath * UHS-I specific initialization procedure 609d6d50a15SArindam Nath */ 610d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 611d6d50a15SArindam Nath { 612d6d50a15SArindam Nath int err; 613d6d50a15SArindam Nath u8 *status; 614d6d50a15SArindam Nath 615d6d50a15SArindam Nath if (!card->scr.sda_spec3) 616d6d50a15SArindam Nath return 0; 617d6d50a15SArindam Nath 618d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 619d6d50a15SArindam Nath return 0; 620d6d50a15SArindam Nath 621d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 622d6d50a15SArindam Nath if (!status) { 623a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 624d6d50a15SArindam Nath "switch capabilities.\n", mmc_hostname(card->host)); 625d6d50a15SArindam Nath return -ENOMEM; 626d6d50a15SArindam Nath } 627d6d50a15SArindam Nath 628d6d50a15SArindam Nath /* Set 4-bit bus width */ 629d6d50a15SArindam Nath if ((card->host->caps & MMC_CAP_4_BIT_DATA) && 630d6d50a15SArindam Nath (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 631d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 632d6d50a15SArindam Nath if (err) 633d6d50a15SArindam Nath goto out; 634d6d50a15SArindam Nath 635d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 636d6d50a15SArindam Nath } 637d6d50a15SArindam Nath 63893c712f9SSubhash Jadavani /* 63993c712f9SSubhash Jadavani * Select the bus speed mode depending on host 64093c712f9SSubhash Jadavani * and card capability. 64193c712f9SSubhash Jadavani */ 64293c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 64393c712f9SSubhash Jadavani 644d6d50a15SArindam Nath /* Set the driver strength for the card */ 645d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 64649c468fcSArindam Nath if (err) 64749c468fcSArindam Nath goto out; 64849c468fcSArindam Nath 64993c712f9SSubhash Jadavani /* Set current limit for the card */ 65093c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6515371c927SArindam Nath if (err) 6525371c927SArindam Nath goto out; 6535371c927SArindam Nath 65493c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 65593c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 656b513ea25SArindam Nath if (err) 657b513ea25SArindam Nath goto out; 658b513ea25SArindam Nath 659810e08eeSFredrik Soderstedt /* 660810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 661810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 662810e08eeSFredrik Soderstedt */ 663810e08eeSFredrik Soderstedt if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning && 664810e08eeSFredrik Soderstedt (card->sd_bus_speed == UHS_SDR50_BUS_SPEED || 665810e08eeSFredrik Soderstedt card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) { 6662c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 667a4924c71SGirish K S err = card->host->ops->execute_tuning(card->host, 668a4924c71SGirish K S MMC_SEND_TUNING_BLOCK); 6692c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 6702c4967f7SSujit Reddy Thumma } 671d6d50a15SArindam Nath 672d6d50a15SArindam Nath out: 673d6d50a15SArindam Nath kfree(status); 674d6d50a15SArindam Nath 675d6d50a15SArindam Nath return err; 676d6d50a15SArindam Nath } 677d6d50a15SArindam Nath 67851ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 67951ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 68051ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 68151ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 68251ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 68351ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 684dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 685dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 68651ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 68751ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 68851ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 68951ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 69051ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 69151ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 69251ec92e2SPierre Ossman 69351ec92e2SPierre Ossman 69451ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 69551ec92e2SPierre Ossman &dev_attr_cid.attr, 69651ec92e2SPierre Ossman &dev_attr_csd.attr, 69751ec92e2SPierre Ossman &dev_attr_scr.attr, 69851ec92e2SPierre Ossman &dev_attr_date.attr, 699dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 700dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 70151ec92e2SPierre Ossman &dev_attr_fwrev.attr, 70251ec92e2SPierre Ossman &dev_attr_hwrev.attr, 70351ec92e2SPierre Ossman &dev_attr_manfid.attr, 70451ec92e2SPierre Ossman &dev_attr_name.attr, 70551ec92e2SPierre Ossman &dev_attr_oemid.attr, 70651ec92e2SPierre Ossman &dev_attr_serial.attr, 70751ec92e2SPierre Ossman NULL, 70851ec92e2SPierre Ossman }; 709d1e58212SAxel Lin ATTRIBUTE_GROUPS(sd_std); 71051ec92e2SPierre Ossman 71171578a1eSMichal Miroslaw struct device_type sd_type = { 712d1e58212SAxel Lin .groups = sd_std_groups, 71351ec92e2SPierre Ossman }; 71451ec92e2SPierre Ossman 7157ea239d9SPierre Ossman /* 71671578a1eSMichal Miroslaw * Fetch CID from card. 7176abaa0c9SPierre Ossman */ 718d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 7196abaa0c9SPierre Ossman { 7206abaa0c9SPierre Ossman int err; 72155c4665eSAaron Lu u32 max_current; 7220797e5f1SJohan Rudholm int retries = 10; 72369041150SUlf Hansson u32 pocr = ocr; 7240797e5f1SJohan Rudholm 7250797e5f1SJohan Rudholm try_again: 7260797e5f1SJohan Rudholm if (!retries) { 7270797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 7286606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); 7290797e5f1SJohan Rudholm } 7306abaa0c9SPierre Ossman 7316abaa0c9SPierre Ossman /* 7326abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 7336abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 7346abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 7356abaa0c9SPierre Ossman * respond. 7366abaa0c9SPierre Ossman */ 7376abaa0c9SPierre Ossman mmc_go_idle(host); 7386abaa0c9SPierre Ossman 7396abaa0c9SPierre Ossman /* 7406abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 7416abaa0c9SPierre Ossman * compliant card and we should set bit 30 7426abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 7436abaa0c9SPierre Ossman * block-addressed SDHC cards. 7446abaa0c9SPierre Ossman */ 7456abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 74617b0429dSPierre Ossman if (!err) 747f2119df6SArindam Nath ocr |= SD_OCR_CCS; 7486abaa0c9SPierre Ossman 749f2119df6SArindam Nath /* 750f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 7510797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 7520797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 753f2119df6SArindam Nath */ 7540797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 755f2119df6SArindam Nath ocr |= SD_OCR_S18R; 756f2119df6SArindam Nath 75755c4665eSAaron Lu /* 75855c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 75955c4665eSAaron Lu * XPC should be set to 1. 76055c4665eSAaron Lu */ 76155c4665eSAaron Lu max_current = sd_get_host_max_current(host); 76255c4665eSAaron Lu if (max_current > 150) 763f2119df6SArindam Nath ocr |= SD_OCR_XPC; 764f2119df6SArindam Nath 765d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 76617b0429dSPierre Ossman if (err) 76771578a1eSMichal Miroslaw return err; 7686abaa0c9SPierre Ossman 769f2119df6SArindam Nath /* 770f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 771f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 772f2119df6SArindam Nath */ 773d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 774d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 7750f791fdaSUlf Hansson err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 77669041150SUlf Hansson pocr); 7770797e5f1SJohan Rudholm if (err == -EAGAIN) { 7780797e5f1SJohan Rudholm retries--; 7790797e5f1SJohan Rudholm goto try_again; 7800797e5f1SJohan Rudholm } else if (err) { 7810797e5f1SJohan Rudholm retries = 0; 782f2119df6SArindam Nath goto try_again; 783f2119df6SArindam Nath } 784f2119df6SArindam Nath } 785f2119df6SArindam Nath 786af517150SDavid Brownell if (mmc_host_is_spi(host)) 787af517150SDavid Brownell err = mmc_send_cid(host, cid); 788af517150SDavid Brownell else 7896abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 7906abaa0c9SPierre Ossman 79171578a1eSMichal Miroslaw return err; 792adf66a0dSPierre Ossman } 7936abaa0c9SPierre Ossman 79471578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 79571578a1eSMichal Miroslaw { 79671578a1eSMichal Miroslaw int err; 7976abaa0c9SPierre Ossman 7986abaa0c9SPierre Ossman /* 7996abaa0c9SPierre Ossman * Fetch CSD from card. 8006abaa0c9SPierre Ossman */ 8016abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 80217b0429dSPierre Ossman if (err) 80371578a1eSMichal Miroslaw return err; 8046abaa0c9SPierre Ossman 805bd766312SPierre Ossman err = mmc_decode_csd(card); 806adf66a0dSPierre Ossman if (err) 80771578a1eSMichal Miroslaw return err; 808bd766312SPierre Ossman 80971578a1eSMichal Miroslaw return 0; 8106abaa0c9SPierre Ossman } 8116abaa0c9SPierre Ossman 81271578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 81371578a1eSMichal Miroslaw bool reinit) 81471578a1eSMichal Miroslaw { 81571578a1eSMichal Miroslaw int err; 8166abaa0c9SPierre Ossman 81771578a1eSMichal Miroslaw if (!reinit) { 8186abaa0c9SPierre Ossman /* 8196abaa0c9SPierre Ossman * Fetch SCR from card. 8206abaa0c9SPierre Ossman */ 8216abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 82217b0429dSPierre Ossman if (err) 82371578a1eSMichal Miroslaw return err; 8246abaa0c9SPierre Ossman 825bd766312SPierre Ossman err = mmc_decode_scr(card); 82671578a1eSMichal Miroslaw if (err) 82771578a1eSMichal Miroslaw return err; 8286abaa0c9SPierre Ossman 8296abaa0c9SPierre Ossman /* 830dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 831dfe86cbaSAdrian Hunter */ 832dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 833dfe86cbaSAdrian Hunter if (err) 834dfe86cbaSAdrian Hunter return err; 835dfe86cbaSAdrian Hunter 836dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 837dfe86cbaSAdrian Hunter mmc_init_erase(card); 838dfe86cbaSAdrian Hunter 839dfe86cbaSAdrian Hunter /* 8406abaa0c9SPierre Ossman * Fetch switch information from card. 8416abaa0c9SPierre Ossman */ 8426abaa0c9SPierre Ossman err = mmc_read_switch(card); 84317b0429dSPierre Ossman if (err) 84471578a1eSMichal Miroslaw return err; 8456abaa0c9SPierre Ossman } 8466abaa0c9SPierre Ossman 8476abaa0c9SPierre Ossman /* 8489d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 8499d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 8509d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 8519d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 8529d9f25c0SWolfgang Muees */ 8539d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 8549d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 8559d9f25c0SWolfgang Muees if (err) 85671578a1eSMichal Miroslaw return err; 8579d9f25c0SWolfgang Muees } 8589d9f25c0SWolfgang Muees 8599d9f25c0SWolfgang Muees /* 86071578a1eSMichal Miroslaw * Check if read-only switch is active. 8616abaa0c9SPierre Ossman */ 86271578a1eSMichal Miroslaw if (!reinit) { 86371578a1eSMichal Miroslaw int ro = -1; 8646abaa0c9SPierre Ossman 8652c4967f7SSujit Reddy Thumma if (host->ops->get_ro) { 8662c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 86771578a1eSMichal Miroslaw ro = host->ops->get_ro(host); 8682c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 8692c4967f7SSujit Reddy Thumma } 87071578a1eSMichal Miroslaw 87171578a1eSMichal Miroslaw if (ro < 0) { 8726606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", 87371578a1eSMichal Miroslaw mmc_hostname(host)); 87471578a1eSMichal Miroslaw } else if (ro > 0) { 87571578a1eSMichal Miroslaw mmc_card_set_readonly(card); 87671578a1eSMichal Miroslaw } 87771578a1eSMichal Miroslaw } 87871578a1eSMichal Miroslaw 87971578a1eSMichal Miroslaw return 0; 88071578a1eSMichal Miroslaw } 88171578a1eSMichal Miroslaw 88271578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 88371578a1eSMichal Miroslaw { 88471578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 8856abaa0c9SPierre Ossman 886cdc99179SSeungwon Jeon if (mmc_card_hs(card)) { 8876abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 8886abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 8896abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8906abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 8916abaa0c9SPierre Ossman } 8926abaa0c9SPierre Ossman 89371578a1eSMichal Miroslaw return max_dtr; 89471578a1eSMichal Miroslaw } 89571578a1eSMichal Miroslaw 89671578a1eSMichal Miroslaw /* 89771578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 89871578a1eSMichal Miroslaw * 89971578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 90071578a1eSMichal Miroslaw * we're trying to reinitialise. 90171578a1eSMichal Miroslaw */ 90271578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 90371578a1eSMichal Miroslaw struct mmc_card *oldcard) 90471578a1eSMichal Miroslaw { 90571578a1eSMichal Miroslaw struct mmc_card *card; 90671578a1eSMichal Miroslaw int err; 90771578a1eSMichal Miroslaw u32 cid[4]; 908d6d50a15SArindam Nath u32 rocr = 0; 90971578a1eSMichal Miroslaw 91071578a1eSMichal Miroslaw BUG_ON(!host); 91171578a1eSMichal Miroslaw WARN_ON(!host->claimed); 91271578a1eSMichal Miroslaw 913d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 91471578a1eSMichal Miroslaw if (err) 91571578a1eSMichal Miroslaw return err; 91671578a1eSMichal Miroslaw 91771578a1eSMichal Miroslaw if (oldcard) { 91871578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 91971578a1eSMichal Miroslaw return -ENOENT; 92071578a1eSMichal Miroslaw 92171578a1eSMichal Miroslaw card = oldcard; 92271578a1eSMichal Miroslaw } else { 92371578a1eSMichal Miroslaw /* 92471578a1eSMichal Miroslaw * Allocate card structure. 92571578a1eSMichal Miroslaw */ 92671578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 92771578a1eSMichal Miroslaw if (IS_ERR(card)) 92871578a1eSMichal Miroslaw return PTR_ERR(card); 92971578a1eSMichal Miroslaw 93069041150SUlf Hansson card->ocr = ocr; 93171578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 93271578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 93371578a1eSMichal Miroslaw } 93471578a1eSMichal Miroslaw 93571578a1eSMichal Miroslaw /* 936eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks. 937eac86321SDoug Anderson */ 938eac86321SDoug Anderson if (host->ops->init_card) 939eac86321SDoug Anderson host->ops->init_card(host, card); 940eac86321SDoug Anderson 941eac86321SDoug Anderson /* 94271578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 94371578a1eSMichal Miroslaw */ 94471578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 94571578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 94671578a1eSMichal Miroslaw if (err) 9477fca9675SWei WANG goto free_card; 94871578a1eSMichal Miroslaw } 94971578a1eSMichal Miroslaw 95071578a1eSMichal Miroslaw if (!oldcard) { 95171578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 95271578a1eSMichal Miroslaw if (err) 9537fca9675SWei WANG goto free_card; 95471578a1eSMichal Miroslaw 95571578a1eSMichal Miroslaw mmc_decode_cid(card); 95671578a1eSMichal Miroslaw } 95771578a1eSMichal Miroslaw 95871578a1eSMichal Miroslaw /* 9593d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting 9603d705d14SSascha Hauer * DSR configuration 9613d705d14SSascha Hauer */ 9623d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req) 9633d705d14SSascha Hauer mmc_set_dsr(host); 9643d705d14SSascha Hauer 9653d705d14SSascha Hauer /* 96671578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 96771578a1eSMichal Miroslaw */ 96871578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 96971578a1eSMichal Miroslaw err = mmc_select_card(card); 97071578a1eSMichal Miroslaw if (err) 9717fca9675SWei WANG goto free_card; 97271578a1eSMichal Miroslaw } 97371578a1eSMichal Miroslaw 97471578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 97571578a1eSMichal Miroslaw if (err) 97671578a1eSMichal Miroslaw goto free_card; 97771578a1eSMichal Miroslaw 978d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 979d6d50a15SArindam Nath if (rocr & SD_ROCR_S18A) { 980d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 981d6d50a15SArindam Nath if (err) 982d6d50a15SArindam Nath goto free_card; 983d6d50a15SArindam Nath } else { 98471578a1eSMichal Miroslaw /* 98571578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 98671578a1eSMichal Miroslaw */ 98771578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 98871578a1eSMichal Miroslaw if (err > 0) 989cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS); 99071578a1eSMichal Miroslaw else if (err) 99171578a1eSMichal Miroslaw goto free_card; 99271578a1eSMichal Miroslaw 99371578a1eSMichal Miroslaw /* 99471578a1eSMichal Miroslaw * Set bus speed. 99571578a1eSMichal Miroslaw */ 99671578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 9976abaa0c9SPierre Ossman 9986abaa0c9SPierre Ossman /* 9996abaa0c9SPierre Ossman * Switch to wider bus (if supported). 10006abaa0c9SPierre Ossman */ 100171651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 10026abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 10036abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 100417b0429dSPierre Ossman if (err) 10056abaa0c9SPierre Ossman goto free_card; 10066abaa0c9SPierre Ossman 10076abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 10086abaa0c9SPierre Ossman } 1009d6d50a15SArindam Nath } 10106abaa0c9SPierre Ossman 10116abaa0c9SPierre Ossman host->card = card; 101217b0429dSPierre Ossman return 0; 10136abaa0c9SPierre Ossman 10146abaa0c9SPierre Ossman free_card: 10156abaa0c9SPierre Ossman if (!oldcard) 10166abaa0c9SPierre Ossman mmc_remove_card(card); 10176abaa0c9SPierre Ossman 1018adf66a0dSPierre Ossman return err; 10196abaa0c9SPierre Ossman } 10206abaa0c9SPierre Ossman 10216abaa0c9SPierre Ossman /* 10227ea239d9SPierre Ossman * Host is being removed. Free up the current card. 10237ea239d9SPierre Ossman */ 10247ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 10257ea239d9SPierre Ossman { 10267ea239d9SPierre Ossman BUG_ON(!host); 10277ea239d9SPierre Ossman BUG_ON(!host->card); 10287ea239d9SPierre Ossman 10297ea239d9SPierre Ossman mmc_remove_card(host->card); 10307ea239d9SPierre Ossman host->card = NULL; 10317ea239d9SPierre Ossman } 10327ea239d9SPierre Ossman 10337ea239d9SPierre Ossman /* 1034d3049504SAdrian Hunter * Card detection - card is alive. 1035d3049504SAdrian Hunter */ 1036d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1037d3049504SAdrian Hunter { 1038d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1039d3049504SAdrian Hunter } 1040d3049504SAdrian Hunter 1041d3049504SAdrian Hunter /* 10427ea239d9SPierre Ossman * Card detection callback from host. 10437ea239d9SPierre Ossman */ 10447ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 10457ea239d9SPierre Ossman { 10467ea239d9SPierre Ossman int err; 10477ea239d9SPierre Ossman 10487ea239d9SPierre Ossman BUG_ON(!host); 10497ea239d9SPierre Ossman BUG_ON(!host->card); 10507ea239d9SPierre Ossman 1051e94cfef6SUlf Hansson mmc_get_card(host->card); 10527ea239d9SPierre Ossman 10537ea239d9SPierre Ossman /* 10547ea239d9SPierre Ossman * Just check if our card has been removed. 10557ea239d9SPierre Ossman */ 1056d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 10577ea239d9SPierre Ossman 1058e94cfef6SUlf Hansson mmc_put_card(host->card); 10597ea239d9SPierre Ossman 106017b0429dSPierre Ossman if (err) { 10614101c16aSPierre Ossman mmc_sd_remove(host); 10627ea239d9SPierre Ossman 10637ea239d9SPierre Ossman mmc_claim_host(host); 10647ea239d9SPierre Ossman mmc_detach_bus(host); 10657f7e4129SUlf Hansson mmc_power_off(host); 10667ea239d9SPierre Ossman mmc_release_host(host); 10677ea239d9SPierre Ossman } 10687ea239d9SPierre Ossman } 10697ea239d9SPierre Ossman 10700cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 10716abaa0c9SPierre Ossman { 107285e727edSJaehoon Chung int err = 0; 107385e727edSJaehoon Chung 10746abaa0c9SPierre Ossman BUG_ON(!host); 10756abaa0c9SPierre Ossman BUG_ON(!host->card); 10766abaa0c9SPierre Ossman 10776abaa0c9SPierre Ossman mmc_claim_host(host); 10789ec775f7SUlf Hansson 10799ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 10809ec775f7SUlf Hansson goto out; 10819ec775f7SUlf Hansson 1082af517150SDavid Brownell if (!mmc_host_is_spi(host)) 108385e727edSJaehoon Chung err = mmc_deselect_cards(host); 1084cdc99179SSeungwon Jeon 10859ec775f7SUlf Hansson if (!err) { 108674590263SUlf Hansson mmc_power_off(host); 10879ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 10889ec775f7SUlf Hansson } 108995cdfb72SNicolas Pitre 10909ec775f7SUlf Hansson out: 10919ec775f7SUlf Hansson mmc_release_host(host); 109285e727edSJaehoon Chung return err; 10936abaa0c9SPierre Ossman } 10946abaa0c9SPierre Ossman 10956abaa0c9SPierre Ossman /* 10960cb403a2SUlf Hansson * Callback for suspend 10970cb403a2SUlf Hansson */ 10980cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 10990cb403a2SUlf Hansson { 11000cb403a2SUlf Hansson int err; 11010cb403a2SUlf Hansson 11020cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11030cb403a2SUlf Hansson if (!err) { 11040cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 11050cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 11060cb403a2SUlf Hansson } 11070cb403a2SUlf Hansson 11080cb403a2SUlf Hansson return err; 11090cb403a2SUlf Hansson } 11100cb403a2SUlf Hansson 11110cb403a2SUlf Hansson /* 11126abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11136abaa0c9SPierre Ossman * and, if so, restore all state to it. 11146abaa0c9SPierre Ossman */ 11150cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 11166abaa0c9SPierre Ossman { 11179ec775f7SUlf Hansson int err = 0; 11186abaa0c9SPierre Ossman 11196abaa0c9SPierre Ossman BUG_ON(!host); 11206abaa0c9SPierre Ossman BUG_ON(!host->card); 11216abaa0c9SPierre Ossman 11226abaa0c9SPierre Ossman mmc_claim_host(host); 11239ec775f7SUlf Hansson 11249ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 11259ec775f7SUlf Hansson goto out; 11269ec775f7SUlf Hansson 112769041150SUlf Hansson mmc_power_up(host, host->card->ocr); 112869041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 11299ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 11302986d0bfSPierre Ossman 11319ec775f7SUlf Hansson out: 11329ec775f7SUlf Hansson mmc_release_host(host); 113395cdfb72SNicolas Pitre return err; 11346abaa0c9SPierre Ossman } 11356abaa0c9SPierre Ossman 1136c4d770d7SUlf Hansson /* 11370cb403a2SUlf Hansson * Callback for resume 11380cb403a2SUlf Hansson */ 11390cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 11400cb403a2SUlf Hansson { 11414d223782SUlf Hansson int err = 0; 11420cb403a2SUlf Hansson 11434d223782SUlf Hansson if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { 11440cb403a2SUlf Hansson err = _mmc_sd_resume(host); 11450cb403a2SUlf Hansson pm_runtime_set_active(&host->card->dev); 11460cb403a2SUlf Hansson pm_runtime_mark_last_busy(&host->card->dev); 11474d223782SUlf Hansson } 11480cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 11490cb403a2SUlf Hansson 11500cb403a2SUlf Hansson return err; 11510cb403a2SUlf Hansson } 11520cb403a2SUlf Hansson 11530cb403a2SUlf Hansson /* 1154c4d770d7SUlf Hansson * Callback for runtime_suspend. 1155c4d770d7SUlf Hansson */ 1156c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1157c4d770d7SUlf Hansson { 1158c4d770d7SUlf Hansson int err; 1159c4d770d7SUlf Hansson 1160c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1161c4d770d7SUlf Hansson return 0; 1162c4d770d7SUlf Hansson 11630cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11640cc81a8cSUlf Hansson if (err) 1165c4d770d7SUlf Hansson pr_err("%s: error %d doing aggessive suspend\n", 1166c4d770d7SUlf Hansson mmc_hostname(host), err); 1167c4d770d7SUlf Hansson 1168c4d770d7SUlf Hansson return err; 1169c4d770d7SUlf Hansson } 1170c4d770d7SUlf Hansson 1171c4d770d7SUlf Hansson /* 1172c4d770d7SUlf Hansson * Callback for runtime_resume. 1173c4d770d7SUlf Hansson */ 1174c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1175c4d770d7SUlf Hansson { 1176c4d770d7SUlf Hansson int err; 1177c4d770d7SUlf Hansson 11784d223782SUlf Hansson if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME))) 1179c4d770d7SUlf Hansson return 0; 1180c4d770d7SUlf Hansson 11810cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1182c4d770d7SUlf Hansson if (err) 1183c4d770d7SUlf Hansson pr_err("%s: error %d doing aggessive resume\n", 1184c4d770d7SUlf Hansson mmc_hostname(host), err); 1185c4d770d7SUlf Hansson 1186c4d770d7SUlf Hansson return 0; 1187c4d770d7SUlf Hansson } 1188c4d770d7SUlf Hansson 118912ae637fSOhad Ben-Cohen static int mmc_sd_power_restore(struct mmc_host *host) 1190eae1aeeeSAdrian Hunter { 119112ae637fSOhad Ben-Cohen int ret; 119212ae637fSOhad Ben-Cohen 1193eae1aeeeSAdrian Hunter mmc_claim_host(host); 119469041150SUlf Hansson ret = mmc_sd_init_card(host, host->card->ocr, host->card); 1195eae1aeeeSAdrian Hunter mmc_release_host(host); 119612ae637fSOhad Ben-Cohen 119712ae637fSOhad Ben-Cohen return ret; 1198eae1aeeeSAdrian Hunter } 1199eae1aeeeSAdrian Hunter 1200*dc0ecfefSJohan Rudholm static int mmc_sd_reset(struct mmc_host *host) 1201*dc0ecfefSJohan Rudholm { 1202*dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr); 1203*dc0ecfefSJohan Rudholm return mmc_sd_power_restore(host); 1204*dc0ecfefSJohan Rudholm } 1205*dc0ecfefSJohan Rudholm 12069feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 12079feae246SAdrian Hunter .remove = mmc_sd_remove, 12089feae246SAdrian Hunter .detect = mmc_sd_detect, 1209c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1210c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 12119feae246SAdrian Hunter .suspend = mmc_sd_suspend, 12129feae246SAdrian Hunter .resume = mmc_sd_resume, 1213eae1aeeeSAdrian Hunter .power_restore = mmc_sd_power_restore, 1214d3049504SAdrian Hunter .alive = mmc_sd_alive, 12155992e786SUlf Hansson .shutdown = mmc_sd_suspend, 1216*dc0ecfefSJohan Rudholm .reset = mmc_sd_reset, 12179feae246SAdrian Hunter }; 12189feae246SAdrian Hunter 12197ea239d9SPierre Ossman /* 12207ea239d9SPierre Ossman * Starting point for SD card init. 12217ea239d9SPierre Ossman */ 1222807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 12237ea239d9SPierre Ossman { 12247ea239d9SPierre Ossman int err; 122569041150SUlf Hansson u32 ocr, rocr; 12267ea239d9SPierre Ossman 12277ea239d9SPierre Ossman BUG_ON(!host); 1228d84075c8SPierre Ossman WARN_ON(!host->claimed); 12297ea239d9SPierre Ossman 1230807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1231807e8e40SAndy Ross if (err) 1232807e8e40SAndy Ross return err; 1233807e8e40SAndy Ross 12342501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops); 12358f230f45STakashi Iwai if (host->ocr_avail_sd) 12368f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 12377ea239d9SPierre Ossman 123855556da0SPhilip Langdale /* 1239af517150SDavid Brownell * We need to get OCR a different way for SPI. 1240af517150SDavid Brownell */ 1241af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1242af517150SDavid Brownell mmc_go_idle(host); 1243af517150SDavid Brownell 1244af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1245af517150SDavid Brownell if (err) 1246af517150SDavid Brownell goto err; 1247af517150SDavid Brownell } 1248af517150SDavid Brownell 124969041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 12507ea239d9SPierre Ossman 12517ea239d9SPierre Ossman /* 12527ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 12537ea239d9SPierre Ossman */ 125469041150SUlf Hansson if (!rocr) { 1255109b5bedSPierre Ossman err = -EINVAL; 12567ea239d9SPierre Ossman goto err; 1257109b5bedSPierre Ossman } 12587ea239d9SPierre Ossman 12597ea239d9SPierre Ossman /* 12606abaa0c9SPierre Ossman * Detect and init the card. 12617ea239d9SPierre Ossman */ 126269041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 126317b0429dSPierre Ossman if (err) 12647ea239d9SPierre Ossman goto err; 12657ea239d9SPierre Ossman 12667ea239d9SPierre Ossman mmc_release_host(host); 12674101c16aSPierre Ossman err = mmc_add_card(host->card); 1268807e8e40SAndy Ross mmc_claim_host(host); 12697ea239d9SPierre Ossman if (err) 12702986d0bfSPierre Ossman goto remove_card; 12717ea239d9SPierre Ossman 12727ea239d9SPierre Ossman return 0; 12737ea239d9SPierre Ossman 12742986d0bfSPierre Ossman remove_card: 1275807e8e40SAndy Ross mmc_release_host(host); 12766abaa0c9SPierre Ossman mmc_remove_card(host->card); 12777ea239d9SPierre Ossman host->card = NULL; 12782986d0bfSPierre Ossman mmc_claim_host(host); 12797ea239d9SPierre Ossman err: 12807ea239d9SPierre Ossman mmc_detach_bus(host); 12817ea239d9SPierre Ossman 1282a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1283109b5bedSPierre Ossman mmc_hostname(host), err); 1284109b5bedSPierre Ossman 1285adf66a0dSPierre Ossman return err; 12867ea239d9SPierre Ossman } 1287