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> 145a0e3ad6STejun Heo #include <linux/slab.h> 150205a904SPaul Gortmaker #include <linux/stat.h> 16*0cb403a2SUlf Hansson #include <linux/pm_runtime.h> 177ea239d9SPierre Ossman 187ea239d9SPierre Ossman #include <linux/mmc/host.h> 197ea239d9SPierre Ossman #include <linux/mmc/card.h> 207ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 213373c0aeSPierre Ossman #include <linux/mmc/sd.h> 227ea239d9SPierre Ossman 237ea239d9SPierre Ossman #include "core.h" 244101c16aSPierre Ossman #include "bus.h" 257ea239d9SPierre Ossman #include "mmc_ops.h" 26ce101496SMark Brown #include "sd.h" 277ea239d9SPierre Ossman #include "sd_ops.h" 287ea239d9SPierre Ossman 297ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 307ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 317ea239d9SPierre Ossman 0, 0, 0, 0 327ea239d9SPierre Ossman }; 337ea239d9SPierre Ossman 347ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 357ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 367ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 377ea239d9SPierre Ossman }; 387ea239d9SPierre Ossman 397ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 407ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 417ea239d9SPierre Ossman }; 427ea239d9SPierre Ossman 437ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 447ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 457ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 467ea239d9SPierre Ossman }; 477ea239d9SPierre Ossman 487ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 497ea239d9SPierre Ossman ({ \ 507ea239d9SPierre Ossman const int __size = size; \ 517ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 527ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 537ea239d9SPierre Ossman const int __shft = (start) & 31; \ 547ea239d9SPierre Ossman u32 __res; \ 557ea239d9SPierre Ossman \ 567ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 577ea239d9SPierre Ossman if (__size + __shft > 32) \ 587ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 597ea239d9SPierre Ossman __res & __mask; \ 607ea239d9SPierre Ossman }) 617ea239d9SPierre Ossman 627ea239d9SPierre Ossman /* 637ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 647ea239d9SPierre Ossman */ 6571578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 667ea239d9SPierre Ossman { 677ea239d9SPierre Ossman u32 *resp = card->raw_cid; 687ea239d9SPierre Ossman 697ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 707ea239d9SPierre Ossman 717ea239d9SPierre Ossman /* 727ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 737ea239d9SPierre Ossman * have to assume we can parse this. 747ea239d9SPierre Ossman */ 757ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 767ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 777ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 787ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 797ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 807ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 817ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 827ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 837ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 847ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 857ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 867ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 877ea239d9SPierre Ossman 887ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 897ea239d9SPierre Ossman } 907ea239d9SPierre Ossman 917ea239d9SPierre Ossman /* 927ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 937ea239d9SPierre Ossman */ 94bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 957ea239d9SPierre Ossman { 967ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 977ea239d9SPierre Ossman unsigned int e, m, csd_struct; 987ea239d9SPierre Ossman u32 *resp = card->raw_csd; 997ea239d9SPierre Ossman 1007ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1017ea239d9SPierre Ossman 1027ea239d9SPierre Ossman switch (csd_struct) { 1037ea239d9SPierre Ossman case 0: 1047ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1057ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1067ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1077ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1087ea239d9SPierre Ossman 1097ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1107ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1117ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1127ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1137ea239d9SPierre Ossman 1147ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1157ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1167ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1177ea239d9SPierre Ossman 1187ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1197ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1207ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1217ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1227ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1237ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1247ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 125dfe86cbaSAdrian Hunter 126dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 127dfe86cbaSAdrian Hunter csd->erase_size = 1; 128dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) { 129dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 130dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 131dfe86cbaSAdrian Hunter } 1327ea239d9SPierre Ossman break; 1337ea239d9SPierre Ossman case 1: 1347ea239d9SPierre Ossman /* 1353a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most 1367ea239d9SPierre Ossman * interesting fields are unused and have fixed 1377ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1387ea239d9SPierre Ossman * we assume those fixed values ourselves. 1397ea239d9SPierre Ossman */ 1407ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1417ea239d9SPierre Ossman 1427ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1437ea239d9SPierre Ossman csd->tacc_clks = 0; /* Unused */ 1447ea239d9SPierre Ossman 1457ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1467ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1477ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1487ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1493a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22); 1503a303511SArindam Nath 1513a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ 1523a303511SArindam Nath if (csd->c_size >= 0xFFFF) 1533a303511SArindam Nath mmc_card_set_ext_capacity(card); 1547ea239d9SPierre Ossman 1557ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1567ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1577ea239d9SPierre Ossman 1587ea239d9SPierre Ossman csd->read_blkbits = 9; 1597ea239d9SPierre Ossman csd->read_partial = 0; 1607ea239d9SPierre Ossman csd->write_misalign = 0; 1617ea239d9SPierre Ossman csd->read_misalign = 0; 1627ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1637ea239d9SPierre Ossman csd->write_blkbits = 9; 1647ea239d9SPierre Ossman csd->write_partial = 0; 165dfe86cbaSAdrian Hunter csd->erase_size = 1; 1667ea239d9SPierre Ossman break; 1677ea239d9SPierre Ossman default: 168a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n", 1697ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 170bd766312SPierre Ossman return -EINVAL; 1717ea239d9SPierre Ossman } 172bd766312SPierre Ossman 173dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size; 174dfe86cbaSAdrian Hunter 175bd766312SPierre Ossman return 0; 1767ea239d9SPierre Ossman } 1777ea239d9SPierre Ossman 1787ea239d9SPierre Ossman /* 1797ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1807ea239d9SPierre Ossman */ 181bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1827ea239d9SPierre Ossman { 1837ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1847ea239d9SPierre Ossman unsigned int scr_struct; 1857ea239d9SPierre Ossman u32 resp[4]; 1867ea239d9SPierre Ossman 1877ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1887ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1897ea239d9SPierre Ossman 1907ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1917ea239d9SPierre Ossman if (scr_struct != 0) { 192a3c76eb9SGirish K S pr_err("%s: unrecognised SCR structure version %d\n", 1937ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 194bd766312SPierre Ossman return -EINVAL; 1957ea239d9SPierre Ossman } 1967ea239d9SPierre Ossman 1977ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1987ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 199013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2) 200013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */ 201013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); 202bd766312SPierre Ossman 203dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 204dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 205dfe86cbaSAdrian Hunter else 206dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 207dfe86cbaSAdrian Hunter 208f0d89972SAndrei Warkentin if (scr->sda_spec3) 209f0d89972SAndrei Warkentin scr->cmds = UNSTUFF_BITS(resp, 32, 2); 210bd766312SPierre Ossman return 0; 2117ea239d9SPierre Ossman } 2127ea239d9SPierre Ossman 2137ea239d9SPierre Ossman /* 214dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 215dfe86cbaSAdrian Hunter */ 216dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card) 217dfe86cbaSAdrian Hunter { 218dfe86cbaSAdrian Hunter unsigned int au, es, et, eo; 21977776fd0SJaehoon Chung int err, i, max_au; 220dfe86cbaSAdrian Hunter u32 *ssr; 221dfe86cbaSAdrian Hunter 222dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 223a3c76eb9SGirish K S pr_warning("%s: card lacks mandatory SD Status " 224dfe86cbaSAdrian Hunter "function.\n", mmc_hostname(card->host)); 225dfe86cbaSAdrian Hunter return 0; 226dfe86cbaSAdrian Hunter } 227dfe86cbaSAdrian Hunter 228dfe86cbaSAdrian Hunter ssr = kmalloc(64, GFP_KERNEL); 229dfe86cbaSAdrian Hunter if (!ssr) 230dfe86cbaSAdrian Hunter return -ENOMEM; 231dfe86cbaSAdrian Hunter 232dfe86cbaSAdrian Hunter err = mmc_app_sd_status(card, ssr); 233dfe86cbaSAdrian Hunter if (err) { 234a3c76eb9SGirish K S pr_warning("%s: problem reading SD Status " 235dfe86cbaSAdrian Hunter "register.\n", mmc_hostname(card->host)); 236dfe86cbaSAdrian Hunter err = 0; 237dfe86cbaSAdrian Hunter goto out; 238dfe86cbaSAdrian Hunter } 239dfe86cbaSAdrian Hunter 240dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 241dfe86cbaSAdrian Hunter ssr[i] = be32_to_cpu(ssr[i]); 242dfe86cbaSAdrian Hunter 24377776fd0SJaehoon Chung /* SD3.0 increases max AU size to 64MB (0xF) from 4MB (0x9) */ 24477776fd0SJaehoon Chung max_au = card->scr.sda_spec3 ? 0xF : 0x9; 24577776fd0SJaehoon Chung 246dfe86cbaSAdrian Hunter /* 247dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 248dfe86cbaSAdrian Hunter * bitfield positions accordingly. 249dfe86cbaSAdrian Hunter */ 250dfe86cbaSAdrian Hunter au = UNSTUFF_BITS(ssr, 428 - 384, 4); 25177776fd0SJaehoon Chung if (au > 0 && au <= max_au) { 252dfe86cbaSAdrian Hunter card->ssr.au = 1 << (au + 4); 253dfe86cbaSAdrian Hunter es = UNSTUFF_BITS(ssr, 408 - 384, 16); 254dfe86cbaSAdrian Hunter et = UNSTUFF_BITS(ssr, 402 - 384, 6); 255dfe86cbaSAdrian Hunter eo = UNSTUFF_BITS(ssr, 400 - 384, 2); 256dfe86cbaSAdrian Hunter if (es && et) { 257dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 258dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 259dfe86cbaSAdrian Hunter } 260dfe86cbaSAdrian Hunter } else { 261a3c76eb9SGirish K S pr_warning("%s: SD Status: Invalid Allocation Unit " 262dfe86cbaSAdrian Hunter "size.\n", mmc_hostname(card->host)); 263dfe86cbaSAdrian Hunter } 264dfe86cbaSAdrian Hunter out: 265dfe86cbaSAdrian Hunter kfree(ssr); 266dfe86cbaSAdrian Hunter return err; 267dfe86cbaSAdrian Hunter } 268dfe86cbaSAdrian Hunter 269dfe86cbaSAdrian Hunter /* 2701addfcdbSPierre Ossman * Fetches and decodes switch information 2717ea239d9SPierre Ossman */ 2721addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 2737ea239d9SPierre Ossman { 2747ea239d9SPierre Ossman int err; 2757ea239d9SPierre Ossman u8 *status; 2767ea239d9SPierre Ossman 2773373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 27817b0429dSPierre Ossman return 0; 2793373c0aeSPierre Ossman 2803373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 281a3c76eb9SGirish K S pr_warning("%s: card lacks mandatory switch " 2823373c0aeSPierre Ossman "function, performance might suffer.\n", 2833373c0aeSPierre Ossman mmc_hostname(card->host)); 28417b0429dSPierre Ossman return 0; 2853373c0aeSPierre Ossman } 2863373c0aeSPierre Ossman 28717b0429dSPierre Ossman err = -EIO; 2887ea239d9SPierre Ossman 2897ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2907ea239d9SPierre Ossman if (!status) { 291a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 292013909c4SArindam Nath "switch capabilities.\n", 293013909c4SArindam Nath mmc_hostname(card->host)); 29417b0429dSPierre Ossman return -ENOMEM; 2957ea239d9SPierre Ossman } 2967ea239d9SPierre Ossman 297a39ca6aeSAaron Lu /* 298a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation. 299a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not 300a39ca6aeSAaron Lu * change with the arguments. 301a39ca6aeSAaron Lu */ 302a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status); 30317b0429dSPierre Ossman if (err) { 304013909c4SArindam Nath /* 305013909c4SArindam Nath * If the host or the card can't do the switch, 306013909c4SArindam Nath * fail more gracefully. 307013909c4SArindam Nath */ 308013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 309adf66a0dSPierre Ossman goto out; 310adf66a0dSPierre Ossman 311a3c76eb9SGirish K S pr_warning("%s: problem reading Bus Speed modes.\n", 3123373c0aeSPierre Ossman mmc_hostname(card->host)); 31317b0429dSPierre Ossman err = 0; 314adf66a0dSPierre Ossman 3157ea239d9SPierre Ossman goto out; 3167ea239d9SPierre Ossman } 3177ea239d9SPierre Ossman 318fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED) 319fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; 320f2815f68SSubhash Jadavani 321013909c4SArindam Nath if (card->scr.sda_spec3) { 322013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 323a39ca6aeSAaron Lu /* Driver Strengths supported by the card */ 324013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 325013909c4SArindam Nath } 3267ea239d9SPierre Ossman 3271addfcdbSPierre Ossman out: 3281addfcdbSPierre Ossman kfree(status); 3291addfcdbSPierre Ossman 3301addfcdbSPierre Ossman return err; 3311addfcdbSPierre Ossman } 3321addfcdbSPierre Ossman 3331addfcdbSPierre Ossman /* 3341addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3351addfcdbSPierre Ossman */ 33671578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3371addfcdbSPierre Ossman { 3381addfcdbSPierre Ossman int err; 3391addfcdbSPierre Ossman u8 *status; 3401addfcdbSPierre Ossman 3413373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 34217b0429dSPierre Ossman return 0; 3433373c0aeSPierre Ossman 3443373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 34517b0429dSPierre Ossman return 0; 3463373c0aeSPierre Ossman 3471addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 34817b0429dSPierre Ossman return 0; 3491addfcdbSPierre Ossman 3501addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 35117b0429dSPierre Ossman return 0; 3521addfcdbSPierre Ossman 35317b0429dSPierre Ossman err = -EIO; 3541addfcdbSPierre Ossman 3551addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 3561addfcdbSPierre Ossman if (!status) { 357a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 358facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 35917b0429dSPierre Ossman return -ENOMEM; 3601addfcdbSPierre Ossman } 3611addfcdbSPierre Ossman 3627ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 36317b0429dSPierre Ossman if (err) 3647ea239d9SPierre Ossman goto out; 3657ea239d9SPierre Ossman 3667ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 367a3c76eb9SGirish K S pr_warning("%s: Problem switching card " 3687ea239d9SPierre Ossman "into high-speed mode!\n", 3697ea239d9SPierre Ossman mmc_hostname(card->host)); 37071578a1eSMichal Miroslaw err = 0; 3717ea239d9SPierre Ossman } else { 37271578a1eSMichal Miroslaw err = 1; 3737ea239d9SPierre Ossman } 3747ea239d9SPierre Ossman 3757ea239d9SPierre Ossman out: 3767ea239d9SPierre Ossman kfree(status); 3777ea239d9SPierre Ossman 3787ea239d9SPierre Ossman return err; 3797ea239d9SPierre Ossman } 3807ea239d9SPierre Ossman 381d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 382d6d50a15SArindam Nath { 383ca8e99b3SPhilip Rakity int host_drv_type = SD_DRIVER_TYPE_B; 384ca8e99b3SPhilip Rakity int card_drv_type = SD_DRIVER_TYPE_B; 385ca8e99b3SPhilip Rakity int drive_strength; 386d6d50a15SArindam Nath int err; 387d6d50a15SArindam Nath 388d6d50a15SArindam Nath /* 389d6d50a15SArindam Nath * If the host doesn't support any of the Driver Types A,C or D, 390ca8e99b3SPhilip Rakity * or there is no board specific handler then default Driver 391ca8e99b3SPhilip Rakity * Type B is used. 392d6d50a15SArindam Nath */ 393d6d50a15SArindam Nath if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C 394d6d50a15SArindam Nath | MMC_CAP_DRIVER_TYPE_D))) 395d6d50a15SArindam Nath return 0; 396d6d50a15SArindam Nath 397ca8e99b3SPhilip Rakity if (!card->host->ops->select_drive_strength) 398ca8e99b3SPhilip Rakity return 0; 399d6d50a15SArindam Nath 400ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) 401ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_A; 402ca8e99b3SPhilip Rakity 403ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) 404ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_C; 405ca8e99b3SPhilip Rakity 406ca8e99b3SPhilip Rakity if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) 407ca8e99b3SPhilip Rakity host_drv_type |= SD_DRIVER_TYPE_D; 408ca8e99b3SPhilip Rakity 409ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) 410ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_A; 411ca8e99b3SPhilip Rakity 412ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) 413ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_C; 414ca8e99b3SPhilip Rakity 415ca8e99b3SPhilip Rakity if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) 416ca8e99b3SPhilip Rakity card_drv_type |= SD_DRIVER_TYPE_D; 417ca8e99b3SPhilip Rakity 418ca8e99b3SPhilip Rakity /* 419ca8e99b3SPhilip Rakity * The drive strength that the hardware can support 420ca8e99b3SPhilip Rakity * depends on the board design. Pass the appropriate 421ca8e99b3SPhilip Rakity * information and let the hardware specific code 422ca8e99b3SPhilip Rakity * return what is possible given the options 423ca8e99b3SPhilip Rakity */ 4242c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 425ca8e99b3SPhilip Rakity drive_strength = card->host->ops->select_drive_strength( 426ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr, 427ca8e99b3SPhilip Rakity host_drv_type, card_drv_type); 4282c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 429ca8e99b3SPhilip Rakity 430ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status); 431d6d50a15SArindam Nath if (err) 432d6d50a15SArindam Nath return err; 433d6d50a15SArindam Nath 434ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) { 435a3c76eb9SGirish K S pr_warning("%s: Problem setting drive strength!\n", 436d6d50a15SArindam Nath mmc_hostname(card->host)); 437d6d50a15SArindam Nath return 0; 438d6d50a15SArindam Nath } 439d6d50a15SArindam Nath 440ca8e99b3SPhilip Rakity mmc_set_driver_type(card->host, drive_strength); 441d6d50a15SArindam Nath 442d6d50a15SArindam Nath return 0; 443d6d50a15SArindam Nath } 444d6d50a15SArindam Nath 44593c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card) 44649c468fcSArindam Nath { 44749c468fcSArindam Nath /* 44849c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 44949c468fcSArindam Nath * default speed. 45049c468fcSArindam Nath */ 4513f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) { 45293c712f9SSubhash Jadavani card->sd_bus_speed = 0; 45393c712f9SSubhash Jadavani return; 45493c712f9SSubhash Jadavani } 45549c468fcSArindam Nath 45649c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 45749c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 45893c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED; 45949c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 46049c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 46193c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED; 46249c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 46349c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 46449c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 46593c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED; 46649c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 46749c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 46849c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 46993c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED; 47049c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 47149c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 47249c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 47349c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 47493c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED; 47593c712f9SSubhash Jadavani } 47649c468fcSArindam Nath } 47749c468fcSArindam Nath 47893c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 47993c712f9SSubhash Jadavani { 48093c712f9SSubhash Jadavani int err; 48193c712f9SSubhash Jadavani unsigned int timing = 0; 48293c712f9SSubhash Jadavani 48393c712f9SSubhash Jadavani switch (card->sd_bus_speed) { 48493c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED: 48593c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104; 48693c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 48793c712f9SSubhash Jadavani break; 48893c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED: 48993c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50; 49093c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 49193c712f9SSubhash Jadavani break; 49293c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED: 49393c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50; 49493c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 49593c712f9SSubhash Jadavani break; 49693c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED: 49793c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25; 49893c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 49993c712f9SSubhash Jadavani break; 50093c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED: 50193c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12; 50293c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 50393c712f9SSubhash Jadavani break; 50493c712f9SSubhash Jadavani default: 50593c712f9SSubhash Jadavani return 0; 50693c712f9SSubhash Jadavani } 50793c712f9SSubhash Jadavani 50893c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); 50949c468fcSArindam Nath if (err) 51049c468fcSArindam Nath return err; 51149c468fcSArindam Nath 51293c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed) 513a3c76eb9SGirish K S pr_warning("%s: Problem setting bus speed mode!\n", 51449c468fcSArindam Nath mmc_hostname(card->host)); 51549c468fcSArindam Nath else { 51649c468fcSArindam Nath mmc_set_timing(card->host, timing); 51749c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 51849c468fcSArindam Nath } 51949c468fcSArindam Nath 52049c468fcSArindam Nath return 0; 52149c468fcSArindam Nath } 52249c468fcSArindam Nath 52355c4665eSAaron Lu /* Get host's max current setting at its current voltage */ 52455c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host) 52555c4665eSAaron Lu { 52655c4665eSAaron Lu u32 voltage, max_current; 52755c4665eSAaron Lu 52855c4665eSAaron Lu voltage = 1 << host->ios.vdd; 52955c4665eSAaron Lu switch (voltage) { 53055c4665eSAaron Lu case MMC_VDD_165_195: 53155c4665eSAaron Lu max_current = host->max_current_180; 53255c4665eSAaron Lu break; 53355c4665eSAaron Lu case MMC_VDD_29_30: 53455c4665eSAaron Lu case MMC_VDD_30_31: 53555c4665eSAaron Lu max_current = host->max_current_300; 53655c4665eSAaron Lu break; 53755c4665eSAaron Lu case MMC_VDD_32_33: 53855c4665eSAaron Lu case MMC_VDD_33_34: 53955c4665eSAaron Lu max_current = host->max_current_330; 54055c4665eSAaron Lu break; 54155c4665eSAaron Lu default: 54255c4665eSAaron Lu max_current = 0; 54355c4665eSAaron Lu } 54455c4665eSAaron Lu 54555c4665eSAaron Lu return max_current; 54655c4665eSAaron Lu } 54755c4665eSAaron Lu 5485371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5495371c927SArindam Nath { 5500aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE; 5515371c927SArindam Nath int err; 55255c4665eSAaron Lu u32 max_current; 5535371c927SArindam Nath 5545371c927SArindam Nath /* 5555371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5560aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the 5570aa67700SPhilip Rakity * current limit. 55855c4665eSAaron Lu */ 55955c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && 56055c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && 56155c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) 56255c4665eSAaron Lu return 0; 56355c4665eSAaron Lu 56455c4665eSAaron Lu /* 56555c4665eSAaron Lu * Host has different current capabilities when operating at 56655c4665eSAaron Lu * different voltages, so find out its max current first. 56755c4665eSAaron Lu */ 56855c4665eSAaron Lu max_current = sd_get_host_max_current(card->host); 56955c4665eSAaron Lu 57055c4665eSAaron Lu /* 571a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is 572a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its 573a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and 574a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and 575a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its 576a39ca6aeSAaron Lu * maximum 300ma from the host. 5775371c927SArindam Nath */ 57855c4665eSAaron Lu if (max_current >= 800) 5795371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 58055c4665eSAaron Lu else if (max_current >= 600) 5815371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 58255c4665eSAaron Lu else if (max_current >= 400) 5835371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 58455c4665eSAaron Lu else if (max_current >= 200) 5855371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5865371c927SArindam Nath 5870aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) { 5885371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5895371c927SArindam Nath if (err) 5905371c927SArindam Nath return err; 5915371c927SArindam Nath 5925371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 593a3c76eb9SGirish K S pr_warning("%s: Problem setting current limit!\n", 5945371c927SArindam Nath mmc_hostname(card->host)); 5955371c927SArindam Nath 5960aa67700SPhilip Rakity } 597a39ca6aeSAaron Lu 5985371c927SArindam Nath return 0; 5995371c927SArindam Nath } 6005371c927SArindam Nath 601d6d50a15SArindam Nath /* 602d6d50a15SArindam Nath * UHS-I specific initialization procedure 603d6d50a15SArindam Nath */ 604d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 605d6d50a15SArindam Nath { 606d6d50a15SArindam Nath int err; 607d6d50a15SArindam Nath u8 *status; 608d6d50a15SArindam Nath 609d6d50a15SArindam Nath if (!card->scr.sda_spec3) 610d6d50a15SArindam Nath return 0; 611d6d50a15SArindam Nath 612d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 613d6d50a15SArindam Nath return 0; 614d6d50a15SArindam Nath 615d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 616d6d50a15SArindam Nath if (!status) { 617a3c76eb9SGirish K S pr_err("%s: could not allocate a buffer for " 618d6d50a15SArindam Nath "switch capabilities.\n", mmc_hostname(card->host)); 619d6d50a15SArindam Nath return -ENOMEM; 620d6d50a15SArindam Nath } 621d6d50a15SArindam Nath 622d6d50a15SArindam Nath /* Set 4-bit bus width */ 623d6d50a15SArindam Nath if ((card->host->caps & MMC_CAP_4_BIT_DATA) && 624d6d50a15SArindam Nath (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 625d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 626d6d50a15SArindam Nath if (err) 627d6d50a15SArindam Nath goto out; 628d6d50a15SArindam Nath 629d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 630d6d50a15SArindam Nath } 631d6d50a15SArindam Nath 63293c712f9SSubhash Jadavani /* 63393c712f9SSubhash Jadavani * Select the bus speed mode depending on host 63493c712f9SSubhash Jadavani * and card capability. 63593c712f9SSubhash Jadavani */ 63693c712f9SSubhash Jadavani sd_update_bus_speed_mode(card); 63793c712f9SSubhash Jadavani 638d6d50a15SArindam Nath /* Set the driver strength for the card */ 639d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 64049c468fcSArindam Nath if (err) 64149c468fcSArindam Nath goto out; 64249c468fcSArindam Nath 64393c712f9SSubhash Jadavani /* Set current limit for the card */ 64493c712f9SSubhash Jadavani err = sd_set_current_limit(card, status); 6455371c927SArindam Nath if (err) 6465371c927SArindam Nath goto out; 6475371c927SArindam Nath 64893c712f9SSubhash Jadavani /* Set bus speed mode of the card */ 64993c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status); 650b513ea25SArindam Nath if (err) 651b513ea25SArindam Nath goto out; 652b513ea25SArindam Nath 653810e08eeSFredrik Soderstedt /* 654810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and 655810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. 656810e08eeSFredrik Soderstedt */ 657810e08eeSFredrik Soderstedt if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning && 658810e08eeSFredrik Soderstedt (card->sd_bus_speed == UHS_SDR50_BUS_SPEED || 659810e08eeSFredrik Soderstedt card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) { 6602c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 661a4924c71SGirish K S err = card->host->ops->execute_tuning(card->host, 662a4924c71SGirish K S MMC_SEND_TUNING_BLOCK); 6632c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 6642c4967f7SSujit Reddy Thumma } 665d6d50a15SArindam Nath 666d6d50a15SArindam Nath out: 667d6d50a15SArindam Nath kfree(status); 668d6d50a15SArindam Nath 669d6d50a15SArindam Nath return err; 670d6d50a15SArindam Nath } 671d6d50a15SArindam Nath 67251ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 67351ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 67451ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 67551ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 67651ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 67751ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 678dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 679dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 68051ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 68151ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 68251ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 68351ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 68451ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 68551ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 68651ec92e2SPierre Ossman 68751ec92e2SPierre Ossman 68851ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 68951ec92e2SPierre Ossman &dev_attr_cid.attr, 69051ec92e2SPierre Ossman &dev_attr_csd.attr, 69151ec92e2SPierre Ossman &dev_attr_scr.attr, 69251ec92e2SPierre Ossman &dev_attr_date.attr, 693dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 694dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 69551ec92e2SPierre Ossman &dev_attr_fwrev.attr, 69651ec92e2SPierre Ossman &dev_attr_hwrev.attr, 69751ec92e2SPierre Ossman &dev_attr_manfid.attr, 69851ec92e2SPierre Ossman &dev_attr_name.attr, 69951ec92e2SPierre Ossman &dev_attr_oemid.attr, 70051ec92e2SPierre Ossman &dev_attr_serial.attr, 70151ec92e2SPierre Ossman NULL, 70251ec92e2SPierre Ossman }; 70351ec92e2SPierre Ossman 70451ec92e2SPierre Ossman static struct attribute_group sd_std_attr_group = { 70551ec92e2SPierre Ossman .attrs = sd_std_attrs, 70651ec92e2SPierre Ossman }; 70751ec92e2SPierre Ossman 708a4dbd674SDavid Brownell static const struct attribute_group *sd_attr_groups[] = { 70951ec92e2SPierre Ossman &sd_std_attr_group, 71051ec92e2SPierre Ossman NULL, 71151ec92e2SPierre Ossman }; 71251ec92e2SPierre Ossman 71371578a1eSMichal Miroslaw struct device_type sd_type = { 71451ec92e2SPierre Ossman .groups = sd_attr_groups, 71551ec92e2SPierre Ossman }; 71651ec92e2SPierre Ossman 7177ea239d9SPierre Ossman /* 71871578a1eSMichal Miroslaw * Fetch CID from card. 7196abaa0c9SPierre Ossman */ 720d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 7216abaa0c9SPierre Ossman { 7226abaa0c9SPierre Ossman int err; 72355c4665eSAaron Lu u32 max_current; 7240797e5f1SJohan Rudholm int retries = 10; 72569041150SUlf Hansson u32 pocr = ocr; 7260797e5f1SJohan Rudholm 7270797e5f1SJohan Rudholm try_again: 7280797e5f1SJohan Rudholm if (!retries) { 7290797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R; 7300797e5f1SJohan Rudholm pr_warning("%s: Skipping voltage switch\n", 7310797e5f1SJohan Rudholm mmc_hostname(host)); 7320797e5f1SJohan Rudholm } 7336abaa0c9SPierre Ossman 7346abaa0c9SPierre Ossman /* 7356abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 7366abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 7376abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 7386abaa0c9SPierre Ossman * respond. 7396abaa0c9SPierre Ossman */ 7406abaa0c9SPierre Ossman mmc_go_idle(host); 7416abaa0c9SPierre Ossman 7426abaa0c9SPierre Ossman /* 7436abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 7446abaa0c9SPierre Ossman * compliant card and we should set bit 30 7456abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 7466abaa0c9SPierre Ossman * block-addressed SDHC cards. 7476abaa0c9SPierre Ossman */ 7486abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 74917b0429dSPierre Ossman if (!err) 750f2119df6SArindam Nath ocr |= SD_OCR_CCS; 7516abaa0c9SPierre Ossman 752f2119df6SArindam Nath /* 753f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 7540797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed 7550797e5f1SJohan Rudholm * repeatedly to switch however, skip this. 756f2119df6SArindam Nath */ 7570797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host)) 758f2119df6SArindam Nath ocr |= SD_OCR_S18R; 759f2119df6SArindam Nath 76055c4665eSAaron Lu /* 76155c4665eSAaron Lu * If the host can supply more than 150mA at current voltage, 76255c4665eSAaron Lu * XPC should be set to 1. 76355c4665eSAaron Lu */ 76455c4665eSAaron Lu max_current = sd_get_host_max_current(host); 76555c4665eSAaron Lu if (max_current > 150) 766f2119df6SArindam Nath ocr |= SD_OCR_XPC; 767f2119df6SArindam Nath 768d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 76917b0429dSPierre Ossman if (err) 77071578a1eSMichal Miroslaw return err; 7716abaa0c9SPierre Ossman 772f2119df6SArindam Nath /* 773f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 774f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 775f2119df6SArindam Nath */ 776d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 777d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 7780f791fdaSUlf Hansson err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 77969041150SUlf Hansson pocr); 7800797e5f1SJohan Rudholm if (err == -EAGAIN) { 7810797e5f1SJohan Rudholm retries--; 7820797e5f1SJohan Rudholm goto try_again; 7830797e5f1SJohan Rudholm } else if (err) { 7840797e5f1SJohan Rudholm retries = 0; 785f2119df6SArindam Nath goto try_again; 786f2119df6SArindam Nath } 787f2119df6SArindam Nath } 788f2119df6SArindam Nath 789af517150SDavid Brownell if (mmc_host_is_spi(host)) 790af517150SDavid Brownell err = mmc_send_cid(host, cid); 791af517150SDavid Brownell else 7926abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 7936abaa0c9SPierre Ossman 79471578a1eSMichal Miroslaw return err; 795adf66a0dSPierre Ossman } 7966abaa0c9SPierre Ossman 79771578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 79871578a1eSMichal Miroslaw { 79971578a1eSMichal Miroslaw int err; 8006abaa0c9SPierre Ossman 8016abaa0c9SPierre Ossman /* 8026abaa0c9SPierre Ossman * Fetch CSD from card. 8036abaa0c9SPierre Ossman */ 8046abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 80517b0429dSPierre Ossman if (err) 80671578a1eSMichal Miroslaw return err; 8076abaa0c9SPierre Ossman 808bd766312SPierre Ossman err = mmc_decode_csd(card); 809adf66a0dSPierre Ossman if (err) 81071578a1eSMichal Miroslaw return err; 811bd766312SPierre Ossman 81271578a1eSMichal Miroslaw return 0; 8136abaa0c9SPierre Ossman } 8146abaa0c9SPierre Ossman 81571578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 81671578a1eSMichal Miroslaw bool reinit) 81771578a1eSMichal Miroslaw { 81871578a1eSMichal Miroslaw int err; 8196abaa0c9SPierre Ossman 82071578a1eSMichal Miroslaw if (!reinit) { 8216abaa0c9SPierre Ossman /* 8226abaa0c9SPierre Ossman * Fetch SCR from card. 8236abaa0c9SPierre Ossman */ 8246abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 82517b0429dSPierre Ossman if (err) 82671578a1eSMichal Miroslaw return err; 8276abaa0c9SPierre Ossman 828bd766312SPierre Ossman err = mmc_decode_scr(card); 82971578a1eSMichal Miroslaw if (err) 83071578a1eSMichal Miroslaw return err; 8316abaa0c9SPierre Ossman 8326abaa0c9SPierre Ossman /* 833dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 834dfe86cbaSAdrian Hunter */ 835dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 836dfe86cbaSAdrian Hunter if (err) 837dfe86cbaSAdrian Hunter return err; 838dfe86cbaSAdrian Hunter 839dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 840dfe86cbaSAdrian Hunter mmc_init_erase(card); 841dfe86cbaSAdrian Hunter 842dfe86cbaSAdrian Hunter /* 8436abaa0c9SPierre Ossman * Fetch switch information from card. 8446abaa0c9SPierre Ossman */ 8456abaa0c9SPierre Ossman err = mmc_read_switch(card); 84617b0429dSPierre Ossman if (err) 84771578a1eSMichal Miroslaw return err; 8486abaa0c9SPierre Ossman } 8496abaa0c9SPierre Ossman 8506abaa0c9SPierre Ossman /* 8519d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 8529d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 8539d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 8549d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 8559d9f25c0SWolfgang Muees */ 8569d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 8579d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 8589d9f25c0SWolfgang Muees if (err) 85971578a1eSMichal Miroslaw return err; 8609d9f25c0SWolfgang Muees } 8619d9f25c0SWolfgang Muees 8629d9f25c0SWolfgang Muees /* 86371578a1eSMichal Miroslaw * Check if read-only switch is active. 8646abaa0c9SPierre Ossman */ 86571578a1eSMichal Miroslaw if (!reinit) { 86671578a1eSMichal Miroslaw int ro = -1; 8676abaa0c9SPierre Ossman 8682c4967f7SSujit Reddy Thumma if (host->ops->get_ro) { 8692c4967f7SSujit Reddy Thumma mmc_host_clk_hold(card->host); 87071578a1eSMichal Miroslaw ro = host->ops->get_ro(host); 8712c4967f7SSujit Reddy Thumma mmc_host_clk_release(card->host); 8722c4967f7SSujit Reddy Thumma } 87371578a1eSMichal Miroslaw 87471578a1eSMichal Miroslaw if (ro < 0) { 875a3c76eb9SGirish K S pr_warning("%s: host does not " 87671578a1eSMichal Miroslaw "support reading read-only " 87771578a1eSMichal Miroslaw "switch. assuming write-enable.\n", 87871578a1eSMichal Miroslaw mmc_hostname(host)); 87971578a1eSMichal Miroslaw } else if (ro > 0) { 88071578a1eSMichal Miroslaw mmc_card_set_readonly(card); 88171578a1eSMichal Miroslaw } 88271578a1eSMichal Miroslaw } 88371578a1eSMichal Miroslaw 88471578a1eSMichal Miroslaw return 0; 88571578a1eSMichal Miroslaw } 88671578a1eSMichal Miroslaw 88771578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 88871578a1eSMichal Miroslaw { 88971578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 8906abaa0c9SPierre Ossman 8916abaa0c9SPierre Ossman if (mmc_card_highspeed(card)) { 8926abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 8936abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 8946abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8956abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 8966abaa0c9SPierre Ossman } 8976abaa0c9SPierre Ossman 89871578a1eSMichal Miroslaw return max_dtr; 89971578a1eSMichal Miroslaw } 90071578a1eSMichal Miroslaw 90171578a1eSMichal Miroslaw void mmc_sd_go_highspeed(struct mmc_card *card) 90271578a1eSMichal Miroslaw { 90371578a1eSMichal Miroslaw mmc_card_set_highspeed(card); 90471578a1eSMichal Miroslaw mmc_set_timing(card->host, MMC_TIMING_SD_HS); 90571578a1eSMichal Miroslaw } 90671578a1eSMichal Miroslaw 90771578a1eSMichal Miroslaw /* 90871578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 90971578a1eSMichal Miroslaw * 91071578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 91171578a1eSMichal Miroslaw * we're trying to reinitialise. 91271578a1eSMichal Miroslaw */ 91371578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 91471578a1eSMichal Miroslaw struct mmc_card *oldcard) 91571578a1eSMichal Miroslaw { 91671578a1eSMichal Miroslaw struct mmc_card *card; 91771578a1eSMichal Miroslaw int err; 91871578a1eSMichal Miroslaw u32 cid[4]; 919d6d50a15SArindam Nath u32 rocr = 0; 92071578a1eSMichal Miroslaw 92171578a1eSMichal Miroslaw BUG_ON(!host); 92271578a1eSMichal Miroslaw WARN_ON(!host->claimed); 92371578a1eSMichal Miroslaw 924d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 92571578a1eSMichal Miroslaw if (err) 92671578a1eSMichal Miroslaw return err; 92771578a1eSMichal Miroslaw 92871578a1eSMichal Miroslaw if (oldcard) { 92971578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 93071578a1eSMichal Miroslaw return -ENOENT; 93171578a1eSMichal Miroslaw 93271578a1eSMichal Miroslaw card = oldcard; 93371578a1eSMichal Miroslaw } else { 93471578a1eSMichal Miroslaw /* 93571578a1eSMichal Miroslaw * Allocate card structure. 93671578a1eSMichal Miroslaw */ 93771578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 93871578a1eSMichal Miroslaw if (IS_ERR(card)) 93971578a1eSMichal Miroslaw return PTR_ERR(card); 94071578a1eSMichal Miroslaw 94169041150SUlf Hansson card->ocr = ocr; 94271578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 94371578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 94471578a1eSMichal Miroslaw } 94571578a1eSMichal Miroslaw 94671578a1eSMichal Miroslaw /* 94771578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 94871578a1eSMichal Miroslaw */ 94971578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 95071578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 95171578a1eSMichal Miroslaw if (err) 9527fca9675SWei WANG goto free_card; 95371578a1eSMichal Miroslaw } 95471578a1eSMichal Miroslaw 95571578a1eSMichal Miroslaw if (!oldcard) { 95671578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 95771578a1eSMichal Miroslaw if (err) 9587fca9675SWei WANG goto free_card; 95971578a1eSMichal Miroslaw 96071578a1eSMichal Miroslaw mmc_decode_cid(card); 96171578a1eSMichal Miroslaw } 96271578a1eSMichal Miroslaw 96371578a1eSMichal Miroslaw /* 96471578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 96571578a1eSMichal Miroslaw */ 96671578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 96771578a1eSMichal Miroslaw err = mmc_select_card(card); 96871578a1eSMichal Miroslaw if (err) 9697fca9675SWei WANG goto free_card; 97071578a1eSMichal Miroslaw } 97171578a1eSMichal Miroslaw 97271578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 97371578a1eSMichal Miroslaw if (err) 97471578a1eSMichal Miroslaw goto free_card; 97571578a1eSMichal Miroslaw 976d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 977d6d50a15SArindam Nath if (rocr & SD_ROCR_S18A) { 978d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 979d6d50a15SArindam Nath if (err) 980d6d50a15SArindam Nath goto free_card; 9813a303511SArindam Nath 9823a303511SArindam Nath /* Card is an ultra-high-speed card */ 983a303c531SPhilip Rakity mmc_card_set_uhs(card); 984d6d50a15SArindam Nath } else { 98571578a1eSMichal Miroslaw /* 98671578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 98771578a1eSMichal Miroslaw */ 98871578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 98971578a1eSMichal Miroslaw if (err > 0) 99071578a1eSMichal Miroslaw mmc_sd_go_highspeed(card); 99171578a1eSMichal Miroslaw else if (err) 99271578a1eSMichal Miroslaw goto free_card; 99371578a1eSMichal Miroslaw 99471578a1eSMichal Miroslaw /* 99571578a1eSMichal Miroslaw * Set bus speed. 99671578a1eSMichal Miroslaw */ 99771578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 9986abaa0c9SPierre Ossman 9996abaa0c9SPierre Ossman /* 10006abaa0c9SPierre Ossman * Switch to wider bus (if supported). 10016abaa0c9SPierre Ossman */ 100271651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 10036abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 10046abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 100517b0429dSPierre Ossman if (err) 10066abaa0c9SPierre Ossman goto free_card; 10076abaa0c9SPierre Ossman 10086abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 10096abaa0c9SPierre Ossman } 1010d6d50a15SArindam Nath } 10116abaa0c9SPierre Ossman 10126abaa0c9SPierre Ossman host->card = card; 101317b0429dSPierre Ossman return 0; 10146abaa0c9SPierre Ossman 10156abaa0c9SPierre Ossman free_card: 10166abaa0c9SPierre Ossman if (!oldcard) 10176abaa0c9SPierre Ossman mmc_remove_card(card); 10186abaa0c9SPierre Ossman 1019adf66a0dSPierre Ossman return err; 10206abaa0c9SPierre Ossman } 10216abaa0c9SPierre Ossman 10226abaa0c9SPierre Ossman /* 10237ea239d9SPierre Ossman * Host is being removed. Free up the current card. 10247ea239d9SPierre Ossman */ 10257ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 10267ea239d9SPierre Ossman { 10277ea239d9SPierre Ossman BUG_ON(!host); 10287ea239d9SPierre Ossman BUG_ON(!host->card); 10297ea239d9SPierre Ossman 10307ea239d9SPierre Ossman mmc_remove_card(host->card); 10317ea239d9SPierre Ossman host->card = NULL; 10327ea239d9SPierre Ossman } 10337ea239d9SPierre Ossman 10347ea239d9SPierre Ossman /* 1035d3049504SAdrian Hunter * Card detection - card is alive. 1036d3049504SAdrian Hunter */ 1037d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host) 1038d3049504SAdrian Hunter { 1039d3049504SAdrian Hunter return mmc_send_status(host->card, NULL); 1040d3049504SAdrian Hunter } 1041d3049504SAdrian Hunter 1042d3049504SAdrian Hunter /* 10437ea239d9SPierre Ossman * Card detection callback from host. 10447ea239d9SPierre Ossman */ 10457ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 10467ea239d9SPierre Ossman { 10477ea239d9SPierre Ossman int err; 10487ea239d9SPierre Ossman 10497ea239d9SPierre Ossman BUG_ON(!host); 10507ea239d9SPierre Ossman BUG_ON(!host->card); 10517ea239d9SPierre Ossman 1052e94cfef6SUlf Hansson mmc_get_card(host->card); 10537ea239d9SPierre Ossman 10547ea239d9SPierre Ossman /* 10557ea239d9SPierre Ossman * Just check if our card has been removed. 10567ea239d9SPierre Ossman */ 1057d3049504SAdrian Hunter err = _mmc_detect_card_removed(host); 10587ea239d9SPierre Ossman 1059e94cfef6SUlf Hansson mmc_put_card(host->card); 10607ea239d9SPierre Ossman 106117b0429dSPierre Ossman if (err) { 10624101c16aSPierre Ossman mmc_sd_remove(host); 10637ea239d9SPierre Ossman 10647ea239d9SPierre Ossman mmc_claim_host(host); 10657ea239d9SPierre Ossman mmc_detach_bus(host); 10667f7e4129SUlf Hansson mmc_power_off(host); 10677ea239d9SPierre Ossman mmc_release_host(host); 10687ea239d9SPierre Ossman } 10697ea239d9SPierre Ossman } 10707ea239d9SPierre Ossman 1071*0cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host) 10726abaa0c9SPierre Ossman { 107385e727edSJaehoon Chung int err = 0; 107485e727edSJaehoon Chung 10756abaa0c9SPierre Ossman BUG_ON(!host); 10766abaa0c9SPierre Ossman BUG_ON(!host->card); 10776abaa0c9SPierre Ossman 10786abaa0c9SPierre Ossman mmc_claim_host(host); 10799ec775f7SUlf Hansson 10809ec775f7SUlf Hansson if (mmc_card_suspended(host->card)) 10819ec775f7SUlf Hansson goto out; 10829ec775f7SUlf Hansson 1083af517150SDavid Brownell if (!mmc_host_is_spi(host)) 108485e727edSJaehoon Chung err = mmc_deselect_cards(host); 10856abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 10869ec775f7SUlf Hansson if (!err) { 108774590263SUlf Hansson mmc_power_off(host); 10889ec775f7SUlf Hansson mmc_card_set_suspended(host->card); 10899ec775f7SUlf Hansson } 109095cdfb72SNicolas Pitre 10919ec775f7SUlf Hansson out: 10929ec775f7SUlf Hansson mmc_release_host(host); 109385e727edSJaehoon Chung return err; 10946abaa0c9SPierre Ossman } 10956abaa0c9SPierre Ossman 10966abaa0c9SPierre Ossman /* 1097*0cb403a2SUlf Hansson * Callback for suspend 1098*0cb403a2SUlf Hansson */ 1099*0cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host) 1100*0cb403a2SUlf Hansson { 1101*0cb403a2SUlf Hansson int err; 1102*0cb403a2SUlf Hansson 1103*0cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 1104*0cb403a2SUlf Hansson if (!err) { 1105*0cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev); 1106*0cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev); 1107*0cb403a2SUlf Hansson } 1108*0cb403a2SUlf Hansson 1109*0cb403a2SUlf Hansson return err; 1110*0cb403a2SUlf Hansson } 1111*0cb403a2SUlf Hansson 1112*0cb403a2SUlf Hansson /* 11136abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 11146abaa0c9SPierre Ossman * and, if so, restore all state to it. 11156abaa0c9SPierre Ossman */ 1116*0cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host) 11176abaa0c9SPierre Ossman { 11189ec775f7SUlf Hansson int err = 0; 11196abaa0c9SPierre Ossman 11206abaa0c9SPierre Ossman BUG_ON(!host); 11216abaa0c9SPierre Ossman BUG_ON(!host->card); 11226abaa0c9SPierre Ossman 11236abaa0c9SPierre Ossman mmc_claim_host(host); 11249ec775f7SUlf Hansson 11259ec775f7SUlf Hansson if (!mmc_card_suspended(host->card)) 11269ec775f7SUlf Hansson goto out; 11279ec775f7SUlf Hansson 112869041150SUlf Hansson mmc_power_up(host, host->card->ocr); 112969041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card); 11309ec775f7SUlf Hansson mmc_card_clr_suspended(host->card); 11312986d0bfSPierre Ossman 11329ec775f7SUlf Hansson out: 11339ec775f7SUlf Hansson mmc_release_host(host); 113495cdfb72SNicolas Pitre return err; 11356abaa0c9SPierre Ossman } 11366abaa0c9SPierre Ossman 1137c4d770d7SUlf Hansson /* 1138*0cb403a2SUlf Hansson * Callback for resume 1139*0cb403a2SUlf Hansson */ 1140*0cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host) 1141*0cb403a2SUlf Hansson { 1142*0cb403a2SUlf Hansson int err; 1143*0cb403a2SUlf Hansson 1144*0cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1145*0cb403a2SUlf Hansson pm_runtime_set_active(&host->card->dev); 1146*0cb403a2SUlf Hansson pm_runtime_mark_last_busy(&host->card->dev); 1147*0cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev); 1148*0cb403a2SUlf Hansson 1149*0cb403a2SUlf Hansson return err; 1150*0cb403a2SUlf Hansson } 1151*0cb403a2SUlf Hansson 1152*0cb403a2SUlf Hansson /* 1153c4d770d7SUlf Hansson * Callback for runtime_suspend. 1154c4d770d7SUlf Hansson */ 1155c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host) 1156c4d770d7SUlf Hansson { 1157c4d770d7SUlf Hansson int err; 1158c4d770d7SUlf Hansson 1159c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1160c4d770d7SUlf Hansson return 0; 1161c4d770d7SUlf Hansson 1162*0cb403a2SUlf Hansson err = _mmc_sd_suspend(host); 11630cc81a8cSUlf Hansson if (err) 1164c4d770d7SUlf Hansson pr_err("%s: error %d doing aggessive suspend\n", 1165c4d770d7SUlf Hansson mmc_hostname(host), err); 1166c4d770d7SUlf Hansson 1167c4d770d7SUlf Hansson return err; 1168c4d770d7SUlf Hansson } 1169c4d770d7SUlf Hansson 1170c4d770d7SUlf Hansson /* 1171c4d770d7SUlf Hansson * Callback for runtime_resume. 1172c4d770d7SUlf Hansson */ 1173c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host) 1174c4d770d7SUlf Hansson { 1175c4d770d7SUlf Hansson int err; 1176c4d770d7SUlf Hansson 1177c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) 1178c4d770d7SUlf Hansson return 0; 1179c4d770d7SUlf Hansson 1180*0cb403a2SUlf Hansson err = _mmc_sd_resume(host); 1181c4d770d7SUlf Hansson if (err) 1182c4d770d7SUlf Hansson pr_err("%s: error %d doing aggessive resume\n", 1183c4d770d7SUlf Hansson mmc_hostname(host), err); 1184c4d770d7SUlf Hansson 1185c4d770d7SUlf Hansson return 0; 1186c4d770d7SUlf Hansson } 1187c4d770d7SUlf Hansson 118812ae637fSOhad Ben-Cohen static int mmc_sd_power_restore(struct mmc_host *host) 1189eae1aeeeSAdrian Hunter { 119012ae637fSOhad Ben-Cohen int ret; 119112ae637fSOhad Ben-Cohen 1192eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 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 12009feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 12019feae246SAdrian Hunter .remove = mmc_sd_remove, 12029feae246SAdrian Hunter .detect = mmc_sd_detect, 12039feae246SAdrian Hunter .suspend = NULL, 12049feae246SAdrian Hunter .resume = NULL, 1205eae1aeeeSAdrian Hunter .power_restore = mmc_sd_power_restore, 1206d3049504SAdrian Hunter .alive = mmc_sd_alive, 12075992e786SUlf Hansson .shutdown = mmc_sd_suspend, 12089feae246SAdrian Hunter }; 12099feae246SAdrian Hunter 12109feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops_unsafe = { 12119feae246SAdrian Hunter .remove = mmc_sd_remove, 12129feae246SAdrian Hunter .detect = mmc_sd_detect, 1213c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend, 1214c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume, 12159feae246SAdrian Hunter .suspend = mmc_sd_suspend, 12169feae246SAdrian Hunter .resume = mmc_sd_resume, 1217eae1aeeeSAdrian Hunter .power_restore = mmc_sd_power_restore, 1218d3049504SAdrian Hunter .alive = mmc_sd_alive, 12195992e786SUlf Hansson .shutdown = mmc_sd_suspend, 12209feae246SAdrian Hunter }; 12219feae246SAdrian Hunter 12229feae246SAdrian Hunter static void mmc_sd_attach_bus_ops(struct mmc_host *host) 12239feae246SAdrian Hunter { 12249feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 12259feae246SAdrian Hunter 122671d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 12279feae246SAdrian Hunter bus_ops = &mmc_sd_ops_unsafe; 12289feae246SAdrian Hunter else 12299feae246SAdrian Hunter bus_ops = &mmc_sd_ops; 12309feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 12319feae246SAdrian Hunter } 12329feae246SAdrian Hunter 12337ea239d9SPierre Ossman /* 12347ea239d9SPierre Ossman * Starting point for SD card init. 12357ea239d9SPierre Ossman */ 1236807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 12377ea239d9SPierre Ossman { 12387ea239d9SPierre Ossman int err; 123969041150SUlf Hansson u32 ocr, rocr; 12407ea239d9SPierre Ossman 12417ea239d9SPierre Ossman BUG_ON(!host); 1242d84075c8SPierre Ossman WARN_ON(!host->claimed); 12437ea239d9SPierre Ossman 1244807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1245807e8e40SAndy Ross if (err) 1246807e8e40SAndy Ross return err; 1247807e8e40SAndy Ross 12489feae246SAdrian Hunter mmc_sd_attach_bus_ops(host); 12498f230f45STakashi Iwai if (host->ocr_avail_sd) 12508f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 12517ea239d9SPierre Ossman 125255556da0SPhilip Langdale /* 1253af517150SDavid Brownell * We need to get OCR a different way for SPI. 1254af517150SDavid Brownell */ 1255af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1256af517150SDavid Brownell mmc_go_idle(host); 1257af517150SDavid Brownell 1258af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1259af517150SDavid Brownell if (err) 1260af517150SDavid Brownell goto err; 1261af517150SDavid Brownell } 1262af517150SDavid Brownell 126369041150SUlf Hansson rocr = mmc_select_voltage(host, ocr); 12647ea239d9SPierre Ossman 12657ea239d9SPierre Ossman /* 12667ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 12677ea239d9SPierre Ossman */ 126869041150SUlf Hansson if (!rocr) { 1269109b5bedSPierre Ossman err = -EINVAL; 12707ea239d9SPierre Ossman goto err; 1271109b5bedSPierre Ossman } 12727ea239d9SPierre Ossman 12737ea239d9SPierre Ossman /* 12746abaa0c9SPierre Ossman * Detect and init the card. 12757ea239d9SPierre Ossman */ 127669041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL); 127717b0429dSPierre Ossman if (err) 12787ea239d9SPierre Ossman goto err; 12797ea239d9SPierre Ossman 12807ea239d9SPierre Ossman mmc_release_host(host); 12814101c16aSPierre Ossman err = mmc_add_card(host->card); 1282807e8e40SAndy Ross mmc_claim_host(host); 12837ea239d9SPierre Ossman if (err) 12842986d0bfSPierre Ossman goto remove_card; 12857ea239d9SPierre Ossman 12867ea239d9SPierre Ossman return 0; 12877ea239d9SPierre Ossman 12882986d0bfSPierre Ossman remove_card: 1289807e8e40SAndy Ross mmc_release_host(host); 12906abaa0c9SPierre Ossman mmc_remove_card(host->card); 12917ea239d9SPierre Ossman host->card = NULL; 12922986d0bfSPierre Ossman mmc_claim_host(host); 12937ea239d9SPierre Ossman err: 12947ea239d9SPierre Ossman mmc_detach_bus(host); 12957ea239d9SPierre Ossman 1296a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n", 1297109b5bedSPierre Ossman mmc_hostname(host), err); 1298109b5bedSPierre Ossman 1299adf66a0dSPierre Ossman return err; 13007ea239d9SPierre Ossman } 13017ea239d9SPierre Ossman 1302