sd.c revision dfe86cba7676d58db8de7e623f5e72f1b0d3ca35
17ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 270f10482c668301c483acded13bf68780ad352b9Pierre Ossman * linux/drivers/mmc/core/sd.c 37ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * 47ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 67ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 77ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * 87ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * This program is free software; you can redistribute it and/or modify 97ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * it under the terms of the GNU General Public License version 2 as 107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * published by the Free Software Foundation. 117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include <linux/err.h> 145a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include <linux/mmc/host.h> 177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include <linux/mmc/card.h> 187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include <linux/mmc/mmc.h> 193373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman#include <linux/mmc/sd.h> 207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include "core.h" 224101c16a910b15afd190c6bc7d45864461cf5c25Pierre Ossman#include "bus.h" 237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include "mmc_ops.h" 247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#include "sd_ops.h" 257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanstatic const unsigned int tran_exp[] = { 277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 10000, 100000, 1000000, 10000000, 287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 0, 0, 0, 0 297ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman}; 307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanstatic const unsigned char tran_mant[] = { 327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman}; 357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanstatic const unsigned int tacc_exp[] = { 377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman}; 397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanstatic const unsigned int tacc_mant[] = { 417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman}; 447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman#define UNSTUFF_BITS(resp,start,size) \ 467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman ({ \ 477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman const int __size = size; \ 487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman const int __off = 3 - ((start) / 32); \ 507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman const int __shft = (start) & 31; \ 517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u32 __res; \ 527ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman \ 537ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman __res = resp[__off] >> __shft; \ 547ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (__size + __shft > 32) \ 557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 567ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman __res & __mask; \ 577ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman }) 587ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 597ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 607ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 617ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 6271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawvoid mmc_decode_cid(struct mmc_card *card) 637ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 647ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u32 *resp = card->raw_cid; 657ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 667ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 677ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 697ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * SD doesn't currently have a version field so we will 707ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * have to assume we can parse this. 717ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 737ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 747ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 757ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 767ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 817ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 837ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 847ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 857ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->cid.year += 2000; /* SD cards year offset */ 867ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 877ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 887ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 897ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Given a 128-bit response, decode to our card CSD structure. 907ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 91bd766312618d2ecc85bce663f95faec601447ecbPierre Ossmanstatic int mmc_decode_csd(struct mmc_card *card) 927ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 937ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman struct mmc_csd *csd = &card->csd; 947ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned int e, m, csd_struct; 957ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u32 *resp = card->raw_csd; 967ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 977ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 987ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman switch (csd_struct) { 1007ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman case 0: 1017ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1027ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1037ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1047ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1077ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1097ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->capacity = (1 + m) << (e + 2); 1147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 122dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 123dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 124dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter csd->erase_size = 1; 125dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else if (csd->write_blkbits >= 9) { 126dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 127dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 128dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 1297ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman break; 1307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman case 1: 1317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 1327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * This is a block-addressed SDHC card. Most 1337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * interesting fields are unused and have fixed 1347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * values. To avoid getting tripped by buggy cards, 1357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * we assume those fixed values ourselves. 1367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 1377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_card_set_blockaddr(card); 1387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->tacc_ns = 0; /* Unused */ 1407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->tacc_clks = 0; /* Unused */ 1417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1437ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1457ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->capacity = (1 + m) << 10; 1497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_blkbits = 9; 1517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_partial = 0; 1527ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_misalign = 0; 1537ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->read_misalign = 0; 1547ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->r2w_factor = 4; /* Unused */ 1557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_blkbits = 9; 1567ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman csd->write_partial = 0; 157dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter csd->erase_size = 1; 1587ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman break; 1597ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman default: 160facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1617ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_hostname(card->host), csd_struct); 162bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman return -EINVAL; 1637ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 164bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman 165dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erase_size = csd->erase_size; 166dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 167bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman return 0; 1687ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 1697ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1707ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 1717ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 173bd766312618d2ecc85bce663f95faec601447ecbPierre Ossmanstatic int mmc_decode_scr(struct mmc_card *card) 1747ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 1757ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman struct sd_scr *scr = &card->scr; 1767ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman unsigned int scr_struct; 1777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u32 resp[4]; 1787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman resp[3] = card->raw_scr[1]; 1807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman resp[2] = card->raw_scr[0]; 1817ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1837ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (scr_struct != 0) { 184facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", 1857ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_hostname(card->host), scr_struct); 186bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman return -EINVAL; 1877ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 1887ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 1897ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1907ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 191bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman 192dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 193dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erased_byte = 0xFF; 194dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter else 195dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->erased_byte = 0x0; 196dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 197bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman return 0; 1987ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 1997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 2007ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 201dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Fetch and process SD Status register. 202dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 203dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterstatic int mmc_read_ssr(struct mmc_card *card) 204dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter{ 205dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter unsigned int au, es, et, eo; 206dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter int err, i; 207dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter u32 *ssr; 208dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 209dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 210dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_WARNING "%s: card lacks mandatory SD Status " 211dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "function.\n", mmc_hostname(card->host)); 212dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return 0; 213dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 214dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 215dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter ssr = kmalloc(64, GFP_KERNEL); 216dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (!ssr) 217dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return -ENOMEM; 218dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 219dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_app_sd_status(card, ssr); 220dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) { 221dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_WARNING "%s: problem reading SD Status " 222dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "register.\n", mmc_hostname(card->host)); 223dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = 0; 224dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter goto out; 225dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 226dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 227dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter for (i = 0; i < 16; i++) 228dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter ssr[i] = be32_to_cpu(ssr[i]); 229dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 230dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 231dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 232dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * bitfield positions accordingly. 233dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 234dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter au = UNSTUFF_BITS(ssr, 428 - 384, 4); 235dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (au > 0 || au <= 9) { 236dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->ssr.au = 1 << (au + 4); 237dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter es = UNSTUFF_BITS(ssr, 408 - 384, 16); 238dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter et = UNSTUFF_BITS(ssr, 402 - 384, 6); 239dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter eo = UNSTUFF_BITS(ssr, 400 - 384, 2); 240dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (es && et) { 241dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 242dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter card->ssr.erase_offset = eo * 1000; 243dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 244dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } else { 245dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter printk(KERN_WARNING "%s: SD Status: Invalid Allocation Unit " 246dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter "size.\n", mmc_hostname(card->host)); 247dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter } 248dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunterout: 249dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter kfree(ssr); 250dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return err; 251dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter} 252dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 253dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter/* 2541addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman * Fetches and decodes switch information 2557ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 2561addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossmanstatic int mmc_read_switch(struct mmc_card *card) 2577ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 2587ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman int err; 2597ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman u8 *status; 2607ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 2613373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 26217b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 2633373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman 2643373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 2653373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman printk(KERN_WARNING "%s: card lacks mandatory switch " 2663373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman "function, performance might suffer.\n", 2673373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman mmc_hostname(card->host)); 26817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 2693373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman } 2703373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman 27117b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman err = -EIO; 2727ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 2737ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman status = kmalloc(64, GFP_KERNEL); 2747ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (!status) { 275facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 276facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 27717b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return -ENOMEM; 2787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 2797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 2807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman err = mmc_sd_switch(card, 0, 0, 1, status); 28117b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) { 282d08ebeddfb3293fa4bdfca9c610daf1e8ec8b233Wolfgang Muees /* If the host or the card can't do the switch, 283d08ebeddfb3293fa4bdfca9c610daf1e8ec8b233Wolfgang Muees * fail more gracefully. */ 284d08ebeddfb3293fa4bdfca9c610daf1e8ec8b233Wolfgang Muees if ((err != -EINVAL) 285d08ebeddfb3293fa4bdfca9c610daf1e8ec8b233Wolfgang Muees && (err != -ENOSYS) 286d08ebeddfb3293fa4bdfca9c610daf1e8ec8b233Wolfgang Muees && (err != -EFAULT)) 287adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman goto out; 288adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman 2893373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman printk(KERN_WARNING "%s: problem reading switch " 2903373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman "capabilities, performance might suffer.\n", 2913373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman mmc_hostname(card->host)); 29217b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman err = 0; 293adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman 2947ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman goto out; 2957ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 2967ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 2977ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (status[13] & 0x02) 2987ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman card->sw_caps.hs_max_dtr = 50000000; 2997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 3001addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossmanout: 3011addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman kfree(status); 3021addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3031addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman return err; 3041addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman} 3051addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3061addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman/* 3071addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3081addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman */ 30971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawint mmc_sd_switch_hs(struct mmc_card *card) 3101addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman{ 3111addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman int err; 3121addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman u8 *status; 3131addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3143373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 31517b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 3163373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman 3173373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 31817b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 3193373c0ae6a51085b10a95fd9d2214a9995ef7563Pierre Ossman 3201addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 32117b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 3221addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3231addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman if (card->sw_caps.hs_max_dtr == 0) 32417b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 3251addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 32617b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman err = -EIO; 3271addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3281addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman status = kmalloc(64, GFP_KERNEL); 3291addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman if (!status) { 330facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 331facba9179e3cd5fa91ff40bbc555c5cd4c101092Pierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 33217b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return -ENOMEM; 3331addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman } 3341addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 3357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 33617b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 3377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman goto out; 3387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 3397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if ((status[16] & 0xF) != 1) { 3407ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman printk(KERN_WARNING "%s: Problem switching card " 3417ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman "into high-speed mode!\n", 3427ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_hostname(card->host)); 34371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = 0; 3447ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } else { 34571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = 1; 3467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 3477ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 3487ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanout: 3497ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman kfree(status); 3507ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 3517ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman return err; 3527ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 3537ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 35451ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 35551ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman card->raw_cid[2], card->raw_cid[3]); 35651ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 35751ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman card->raw_csd[2], card->raw_csd[3]); 35851ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 35951ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 360dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterMMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 361dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian HunterMMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 36251ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 36351ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 36451ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 36551ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 36651ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 36751ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre OssmanMMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 36851ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 36951ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 37051ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossmanstatic struct attribute *sd_std_attrs[] = { 37151ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_cid.attr, 37251ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_csd.attr, 37351ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_scr.attr, 37451ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_date.attr, 375dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter &dev_attr_erase_size.attr, 376dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter &dev_attr_preferred_erase_size.attr, 37751ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_fwrev.attr, 37851ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_hwrev.attr, 37951ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_manfid.attr, 38051ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_name.attr, 38151ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_oemid.attr, 38251ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &dev_attr_serial.attr, 38351ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman NULL, 38451ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman}; 38551ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 38651ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossmanstatic struct attribute_group sd_std_attr_group = { 38751ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman .attrs = sd_std_attrs, 38851ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman}; 38951ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 390a4dbd6740df0872cdf0a86841f75beec8381964dDavid Brownellstatic const struct attribute_group *sd_attr_groups[] = { 39151ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman &sd_std_attr_group, 39251ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman NULL, 39351ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman}; 39451ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 39571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawstruct device_type sd_type = { 39651ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman .groups = sd_attr_groups, 39751ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman}; 39851ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman 3997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman/* 40071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Fetch CID from card. 4017ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 40271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawint mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid) 4037ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman{ 4047ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman int err; 4057ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 4067ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 4077ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Since we're changing the OCR value, we seem to 4087ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * need to tell some cards to go back to the idle 4097ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * state. We wait 1ms to give cards time to 4107ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * respond. 4117ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 4127ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_go_idle(host); 4137ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 4147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 4157ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 4167ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * compliant card and we should set bit 30 4177ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * of the ocr to indicate that we can handle 4187ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * block-addressed SDHC cards. 4197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 4206abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman err = mmc_send_if_cond(host, ocr); 42117b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (!err) 4226abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman ocr |= 1 << 30; 4237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 4246abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman err = mmc_send_app_op_cond(host, ocr, NULL); 42517b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 42671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 4277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 428af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) 429af51715079e7fb6b290e1881d63d815dc4de5011David Brownell err = mmc_send_cid(host, cid); 430af51715079e7fb6b290e1881d63d815dc4de5011David Brownell else 431af51715079e7fb6b290e1881d63d815dc4de5011David Brownell err = mmc_all_send_cid(host, cid); 43271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 43371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 43471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw} 43571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 43671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawint mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 43771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw{ 43871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw int err; 43971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 44071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw /* 44171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Fetch CSD from card. 44271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 44371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_send_csd(card, card->raw_csd); 44417b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 44571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 4467ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 44771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_decode_csd(card); 44871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 44971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 45071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 45171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return 0; 45271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw} 45371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 45471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawint mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 45571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw bool reinit) 45671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw{ 45771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw int err; 45871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 45971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (!reinit) { 46071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw /* 46171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Fetch SCR from card. 46271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 46371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_app_send_scr(card, card->raw_scr); 46471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 46571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 46671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 46771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_decode_scr(card); 46871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 46971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 47071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 47171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw /* 472dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter * Fetch and process SD Status register. 473dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter */ 474dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter err = mmc_read_ssr(card); 475dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter if (err) 476dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter return err; 477dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 478dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* Erase init depends on CSD and SSR */ 479dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter mmc_init_erase(card); 480dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter 481dfe86cba7676d58db8de7e623f5e72f1b0d3ca35Adrian Hunter /* 48271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Fetch switch information from card. 48371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 48471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_read_switch(card); 48571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 48671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 48771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } 48871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 48971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw /* 49071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * For SPI, enable CRC as appropriate. 49171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * This CRC enable is located AFTER the reading of the 49271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * card registers because some SDHC cards are not able 49371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * to provide valid CRCs for non-512-byte blocks. 49471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 49571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (mmc_host_is_spi(host)) { 49671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_spi_set_crc(host, use_spi_crc); 49771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 49871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 49971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } 50071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 50171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw /* 50271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Check if read-only switch is active. 50371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 50471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (!reinit) { 50571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw int ro = -1; 50671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 50771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (host->ops->get_ro) 50871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw ro = host->ops->get_ro(host); 50971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 51071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (ro < 0) { 51171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw printk(KERN_WARNING "%s: host does not " 51271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw "support reading read-only " 51371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw "switch. assuming write-enable.\n", 51471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_hostname(host)); 51571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } else if (ro > 0) { 51671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_card_set_readonly(card); 517adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman } 51871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } 51971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 52071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return 0; 52171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw} 52271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 52371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawunsigned mmc_sd_get_max_clock(struct mmc_card *card) 52471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw{ 52571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 52671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 52771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (mmc_card_highspeed(card)) { 52871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (max_dtr > card->sw_caps.hs_max_dtr) 52971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw max_dtr = card->sw_caps.hs_max_dtr; 53071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } else if (max_dtr > card->csd.max_dtr) { 53171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw max_dtr = card->csd.max_dtr; 53271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw } 53371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 53471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return max_dtr; 53571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw} 53671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 53771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawvoid mmc_sd_go_highspeed(struct mmc_card *card) 53871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw{ 53971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_card_set_highspeed(card); 54071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_set_timing(card->host, MMC_TIMING_SD_HS); 54171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw} 54271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 54371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw/* 54471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Handle the detection and initialisation of a card. 54571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * 54671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 54771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * we're trying to reinitialise. 54871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw */ 54971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslawstatic int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 55071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw struct mmc_card *oldcard) 55171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw{ 55271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw struct mmc_card *card; 55371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw int err; 55471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw u32 cid[4]; 55571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 55671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw BUG_ON(!host); 55771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw WARN_ON(!host->claimed); 55871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 55971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_sd_get_cid(host, ocr, cid); 56071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 56171578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 56271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw 56371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (oldcard) { 56471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 56571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return -ENOENT; 5667ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 5676abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman card = oldcard; 5686abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } else { 5696abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 5706abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Allocate card structure. 5716abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 57251ec92e295d563dd5712d198a7e46c2ae5ccccb2Pierre Ossman card = mmc_alloc_card(host, &sd_type); 57371578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (IS_ERR(card)) 57471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return PTR_ERR(card); 5756abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 5766abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman card->type = MMC_TYPE_SD; 5776abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 5786abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 5797ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 5807ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 581af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * For native busses: get card RCA and quit open drain mode. 5827ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 583af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 584af51715079e7fb6b290e1881d63d815dc4de5011David Brownell err = mmc_send_relative_addr(host, &card->rca); 585af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err) 58671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 5877ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 588af51715079e7fb6b290e1881d63d815dc4de5011David Brownell mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 589af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 5907ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 5916abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (!oldcard) { 59271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_sd_get_csd(host, card); 59317b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 59471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 595bd766312618d2ecc85bce663f95faec601447ecbPierre Ossman 5966abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_decode_cid(card); 5976abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 5987ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 5997ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 6006abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Select card, as all following commands rely on that. 6017ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 602af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) { 603af51715079e7fb6b290e1881d63d815dc4de5011David Brownell err = mmc_select_card(card); 604af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err) 60571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw return err; 6066abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 6071addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman 60871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 60971578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err) 61071578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw goto free_card; 6119d9f25c036dd584db175552a7d162403d3ab54b3Wolfgang Muees 6129d9f25c036dd584db175552a7d162403d3ab54b3Wolfgang Muees /* 6131addfcdbe4b23a20f28a097c2469d9f0c21bef23Pierre Ossman * Attempt to change to high-speed (if supported) 6147ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 61571578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw err = mmc_sd_switch_hs(card); 61671578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw if (err > 0) 61771578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_sd_go_highspeed(card); 61871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw else if (err) 6197ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman goto free_card; 6207ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 62271578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw * Set bus speed. 6237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 62471578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 6257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6267ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman /* 6277ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman * Switch to wider bus (if supported). 6287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman */ 62971651297a448289353b2493c6c3c183f9be7be7cPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 6307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 6317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 63217b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 6337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman goto free_card; 6347ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6357ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 6367ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman } 6377ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 63871578a1eaa7b8b9bd3efc9c97d77ef2b63d5dc2bMichal Miroslaw host->card = card; 63917b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman return 0; 6406abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6416abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossmanfree_card: 6426abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (!oldcard) 6436abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_remove_card(card); 6446abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 645adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman return err; 6466abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman} 6476abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6486abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman/* 6496abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Host is being removed. Free up the current card. 6506abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 6516abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossmanstatic void mmc_sd_remove(struct mmc_host *host) 6526abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman{ 6536abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host); 6546abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->card); 6556abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6566abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_remove_card(host->card); 6576abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->card = NULL; 6586abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman} 6596abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6606abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman/* 6616abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Card detection callback from host. 6626abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 6636abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossmanstatic void mmc_sd_detect(struct mmc_host *host) 6646abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman{ 6656abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman int err; 6666abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6676abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host); 6686abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->card); 6696abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6706abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_claim_host(host); 6716abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6726abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 6736abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Just check if our card has been removed. 6746abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 6756abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman err = mmc_send_status(host->card, NULL); 6767ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 6777ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 6787ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 67917b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) { 6804101c16a910b15afd190c6bc7d45864461cf5c25Pierre Ossman mmc_sd_remove(host); 6816abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6826abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_claim_host(host); 6836abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_detach_bus(host); 6846abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_release_host(host); 6856abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 6866abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman} 6876abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6886abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman/* 6896abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Suspend callback from host. 6906abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 69195cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitrestatic int mmc_sd_suspend(struct mmc_host *host) 6926abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman{ 6936abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host); 6946abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->card); 6956abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 6966abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_claim_host(host); 697af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (!mmc_host_is_spi(host)) 698af51715079e7fb6b290e1881d63d815dc4de5011David Brownell mmc_deselect_cards(host); 6996abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 7006abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_release_host(host); 70195cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre 70295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return 0; 7036abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman} 7046abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7056abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman/* 7066abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Resume callback from host. 7076abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * 7086abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * This function tries to determine if the same card is still present 7096abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * and, if so, restore all state to it. 7106abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 71195cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitrestatic int mmc_sd_resume(struct mmc_host *host) 7126abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman{ 7136abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman int err; 7146abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7156abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host); 7166abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host->card); 7176abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7186abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_claim_host(host); 7196abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 7202986d0bf23d97d68804ccfa80965073ccf1af242Pierre Ossman mmc_release_host(host); 7212986d0bf23d97d68804ccfa80965073ccf1af242Pierre Ossman 72295cdfb72b9bc568803f395c266152c71b034b461Nicolas Pitre return err; 7236abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman} 7246abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 725eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunterstatic void mmc_sd_power_restore(struct mmc_host *host) 726eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter{ 727eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 728eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_claim_host(host); 729eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_sd_init_card(host, host->ocr, host->card); 730eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter mmc_release_host(host); 731eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter} 732eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter 7336abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossmanstatic const struct mmc_bus_ops mmc_sd_ops = { 7346abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman .remove = mmc_sd_remove, 7356abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman .detect = mmc_sd_detect, 7369feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter .suspend = NULL, 7379feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter .resume = NULL, 738eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter .power_restore = mmc_sd_power_restore, 7399feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter}; 7409feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter 7419feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunterstatic const struct mmc_bus_ops mmc_sd_ops_unsafe = { 7429feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter .remove = mmc_sd_remove, 7439feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter .detect = mmc_sd_detect, 7446abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman .suspend = mmc_sd_suspend, 7456abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman .resume = mmc_sd_resume, 746eae1aeeed852aae37621b82a9e7f6c05096a18fdAdrian Hunter .power_restore = mmc_sd_power_restore, 7476abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman}; 7486abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7499feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunterstatic void mmc_sd_attach_bus_ops(struct mmc_host *host) 7509feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter{ 7519feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter const struct mmc_bus_ops *bus_ops; 7529feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter 753bd68e0838fe85794b06892054772fa013a8d1986Ben Hutchings if (host->caps & MMC_CAP_NONREMOVABLE || !mmc_assume_removable) 7549feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter bus_ops = &mmc_sd_ops_unsafe; 7559feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter else 7569feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter bus_ops = &mmc_sd_ops; 7579feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter mmc_attach_bus(host, bus_ops); 7589feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter} 7599feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter 7606abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman/* 7616abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Starting point for SD card init. 7626abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 7636abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossmanint mmc_attach_sd(struct mmc_host *host, u32 ocr) 7646abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman{ 7656abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman int err; 7666abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7676abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman BUG_ON(!host); 768d84075c8aed771d47d7ac6e96b098559da361c25Pierre Ossman WARN_ON(!host->claimed); 7696abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7709feae246963c648b212abad0f0eb8938de5f5fe5Adrian Hunter mmc_sd_attach_bus_ops(host); 7716abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7726abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 773af51715079e7fb6b290e1881d63d815dc4de5011David Brownell * We need to get OCR a different way for SPI. 774af51715079e7fb6b290e1881d63d815dc4de5011David Brownell */ 775af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (mmc_host_is_spi(host)) { 776af51715079e7fb6b290e1881d63d815dc4de5011David Brownell mmc_go_idle(host); 777af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 778af51715079e7fb6b290e1881d63d815dc4de5011David Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 779af51715079e7fb6b290e1881d63d815dc4de5011David Brownell if (err) 780af51715079e7fb6b290e1881d63d815dc4de5011David Brownell goto err; 781af51715079e7fb6b290e1881d63d815dc4de5011David Brownell } 782af51715079e7fb6b290e1881d63d815dc4de5011David Brownell 783af51715079e7fb6b290e1881d63d815dc4de5011David Brownell /* 7846abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Sanity check the voltages that the card claims to 7856abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * support. 7866abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 7876abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (ocr & 0x7F) { 7886abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 7896abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman "below the defined range. These will be ignored.\n", 7906abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_hostname(host)); 7916abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman ocr &= ~0x7F; 7926abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 7936abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 7946abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman if (ocr & MMC_VDD_165_195) { 7956abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman printk(KERN_WARNING "%s: SD card claims to support the " 7966abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman "incompletely defined 'low voltage range'. This " 7976abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman "will be ignored.\n", mmc_hostname(host)); 7986abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman ocr &= ~MMC_VDD_165_195; 7996abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman } 8006abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 8016abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 8026abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 8036abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 8046abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Can we support the voltage(s) of the card(s)? 8056abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 806109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman if (!host->ocr) { 807109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman err = -EINVAL; 8086abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman goto err; 809109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman } 8106abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 8116abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman /* 8126abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman * Detect and init the card. 8136abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman */ 8146abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 81517b0429dde9ab60f9cee8e07ab28c7dc6cfe6efdPierre Ossman if (err) 8166abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman goto err; 8176abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 8186abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_release_host(host); 8196abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman 8204101c16a910b15afd190c6bc7d45864461cf5c25Pierre Ossman err = mmc_add_card(host->card); 8217ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman if (err) 8222986d0bf23d97d68804ccfa80965073ccf1af242Pierre Ossman goto remove_card; 8237ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 8247ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman return 0; 8257ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 8262986d0bf23d97d68804ccfa80965073ccf1af242Pierre Ossmanremove_card: 8276abaa0c9fec563538f2a28a682af8c89bb9b125cPierre Ossman mmc_remove_card(host->card); 8287ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman host->card = NULL; 8292986d0bf23d97d68804ccfa80965073ccf1af242Pierre Ossman mmc_claim_host(host); 8307ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossmanerr: 8317ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_detach_bus(host); 8327ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman mmc_release_host(host); 8337ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 834109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman printk(KERN_ERR "%s: error %d whilst initialising SD card\n", 835109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman mmc_hostname(host), err); 836109b5bed18441599b5ab0e1f3623efa5715a4703Pierre Ossman 837adf66a0dc5e8be8d4e64f3c2114f9b175558235bPierre Ossman return err; 8387ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman} 8397ea239d9e6d6993469a6a8ca83ff23834dfc3fcePierre Ossman 840