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> 147ea239d9SPierre Ossman 157ea239d9SPierre Ossman #include <linux/mmc/host.h> 167ea239d9SPierre Ossman #include <linux/mmc/card.h> 177ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 183373c0aeSPierre Ossman #include <linux/mmc/sd.h> 197ea239d9SPierre Ossman 207ea239d9SPierre Ossman #include "core.h" 214101c16aSPierre Ossman #include "bus.h" 227ea239d9SPierre Ossman #include "mmc_ops.h" 237ea239d9SPierre Ossman #include "sd_ops.h" 247ea239d9SPierre Ossman 257ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 267ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 277ea239d9SPierre Ossman 0, 0, 0, 0 287ea239d9SPierre Ossman }; 297ea239d9SPierre Ossman 307ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 317ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 327ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 337ea239d9SPierre Ossman }; 347ea239d9SPierre Ossman 357ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 367ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 377ea239d9SPierre Ossman }; 387ea239d9SPierre Ossman 397ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 407ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 417ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 427ea239d9SPierre Ossman }; 437ea239d9SPierre Ossman 447ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 457ea239d9SPierre Ossman ({ \ 467ea239d9SPierre Ossman const int __size = size; \ 477ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 487ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 497ea239d9SPierre Ossman const int __shft = (start) & 31; \ 507ea239d9SPierre Ossman u32 __res; \ 517ea239d9SPierre Ossman \ 527ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 537ea239d9SPierre Ossman if (__size + __shft > 32) \ 547ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 557ea239d9SPierre Ossman __res & __mask; \ 567ea239d9SPierre Ossman }) 577ea239d9SPierre Ossman 587ea239d9SPierre Ossman /* 597ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 607ea239d9SPierre Ossman */ 617ea239d9SPierre Ossman static void mmc_decode_cid(struct mmc_card *card) 627ea239d9SPierre Ossman { 637ea239d9SPierre Ossman u32 *resp = card->raw_cid; 647ea239d9SPierre Ossman 657ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 667ea239d9SPierre Ossman 677ea239d9SPierre Ossman /* 687ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 697ea239d9SPierre Ossman * have to assume we can parse this. 707ea239d9SPierre Ossman */ 717ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 727ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 737ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 747ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 757ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 767ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 777ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 787ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 797ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 807ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 817ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 827ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 837ea239d9SPierre Ossman 847ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 857ea239d9SPierre Ossman } 867ea239d9SPierre Ossman 877ea239d9SPierre Ossman /* 887ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 897ea239d9SPierre Ossman */ 90bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 917ea239d9SPierre Ossman { 927ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 937ea239d9SPierre Ossman unsigned int e, m, csd_struct; 947ea239d9SPierre Ossman u32 *resp = card->raw_csd; 957ea239d9SPierre Ossman 967ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 977ea239d9SPierre Ossman 987ea239d9SPierre Ossman switch (csd_struct) { 997ea239d9SPierre Ossman case 0: 1007ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1017ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1027ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1037ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1047ea239d9SPierre Ossman 1057ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1067ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1077ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1087ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1097ea239d9SPierre Ossman 1107ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1117ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1127ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1137ea239d9SPierre Ossman 1147ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1157ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1167ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1177ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1187ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1197ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1207ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 1217ea239d9SPierre Ossman break; 1227ea239d9SPierre Ossman case 1: 1237ea239d9SPierre Ossman /* 1247ea239d9SPierre Ossman * This is a block-addressed SDHC card. Most 1257ea239d9SPierre Ossman * interesting fields are unused and have fixed 1267ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1277ea239d9SPierre Ossman * we assume those fixed values ourselves. 1287ea239d9SPierre Ossman */ 1297ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1307ea239d9SPierre Ossman 1317ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1327ea239d9SPierre Ossman csd->tacc_clks = 0; /* Unused */ 1337ea239d9SPierre Ossman 1347ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1357ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1367ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1377ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1387ea239d9SPierre Ossman 1397ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1407ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1417ea239d9SPierre Ossman 1427ea239d9SPierre Ossman csd->read_blkbits = 9; 1437ea239d9SPierre Ossman csd->read_partial = 0; 1447ea239d9SPierre Ossman csd->write_misalign = 0; 1457ea239d9SPierre Ossman csd->read_misalign = 0; 1467ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1477ea239d9SPierre Ossman csd->write_blkbits = 9; 1487ea239d9SPierre Ossman csd->write_partial = 0; 1497ea239d9SPierre Ossman break; 1507ea239d9SPierre Ossman default: 151facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1527ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 153bd766312SPierre Ossman return -EINVAL; 1547ea239d9SPierre Ossman } 155bd766312SPierre Ossman 156bd766312SPierre Ossman return 0; 1577ea239d9SPierre Ossman } 1587ea239d9SPierre Ossman 1597ea239d9SPierre Ossman /* 1607ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1617ea239d9SPierre Ossman */ 162bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1637ea239d9SPierre Ossman { 1647ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1657ea239d9SPierre Ossman unsigned int scr_struct; 1667ea239d9SPierre Ossman u32 resp[4]; 1677ea239d9SPierre Ossman 1687ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1697ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1707ea239d9SPierre Ossman 1717ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1727ea239d9SPierre Ossman if (scr_struct != 0) { 173facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", 1747ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 175bd766312SPierre Ossman return -EINVAL; 1767ea239d9SPierre Ossman } 1777ea239d9SPierre Ossman 1787ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1797ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 180bd766312SPierre Ossman 181bd766312SPierre Ossman return 0; 1827ea239d9SPierre Ossman } 1837ea239d9SPierre Ossman 1847ea239d9SPierre Ossman /* 1851addfcdbSPierre Ossman * Fetches and decodes switch information 1867ea239d9SPierre Ossman */ 1871addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 1887ea239d9SPierre Ossman { 1897ea239d9SPierre Ossman int err; 1907ea239d9SPierre Ossman u8 *status; 1917ea239d9SPierre Ossman 1923373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 19317b0429dSPierre Ossman return 0; 1943373c0aeSPierre Ossman 1953373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 1963373c0aeSPierre Ossman printk(KERN_WARNING "%s: card lacks mandatory switch " 1973373c0aeSPierre Ossman "function, performance might suffer.\n", 1983373c0aeSPierre Ossman mmc_hostname(card->host)); 19917b0429dSPierre Ossman return 0; 2003373c0aeSPierre Ossman } 2013373c0aeSPierre Ossman 20217b0429dSPierre Ossman err = -EIO; 2037ea239d9SPierre Ossman 2047ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2057ea239d9SPierre Ossman if (!status) { 206facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 207facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 20817b0429dSPierre Ossman return -ENOMEM; 2097ea239d9SPierre Ossman } 2107ea239d9SPierre Ossman 2117ea239d9SPierre Ossman err = mmc_sd_switch(card, 0, 0, 1, status); 21217b0429dSPierre Ossman if (err) { 213adf66a0dSPierre Ossman /* 214adf66a0dSPierre Ossman * We all hosts that cannot perform the command 215adf66a0dSPierre Ossman * to fail more gracefully 216adf66a0dSPierre Ossman */ 217adf66a0dSPierre Ossman if (err != -EINVAL) 218adf66a0dSPierre Ossman goto out; 219adf66a0dSPierre Ossman 2203373c0aeSPierre Ossman printk(KERN_WARNING "%s: problem reading switch " 2213373c0aeSPierre Ossman "capabilities, performance might suffer.\n", 2223373c0aeSPierre Ossman mmc_hostname(card->host)); 22317b0429dSPierre Ossman err = 0; 224adf66a0dSPierre Ossman 2257ea239d9SPierre Ossman goto out; 2267ea239d9SPierre Ossman } 2277ea239d9SPierre Ossman 2287ea239d9SPierre Ossman if (status[13] & 0x02) 2297ea239d9SPierre Ossman card->sw_caps.hs_max_dtr = 50000000; 2307ea239d9SPierre Ossman 2311addfcdbSPierre Ossman out: 2321addfcdbSPierre Ossman kfree(status); 2331addfcdbSPierre Ossman 2341addfcdbSPierre Ossman return err; 2351addfcdbSPierre Ossman } 2361addfcdbSPierre Ossman 2371addfcdbSPierre Ossman /* 2381addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 2391addfcdbSPierre Ossman */ 2401addfcdbSPierre Ossman static int mmc_switch_hs(struct mmc_card *card) 2411addfcdbSPierre Ossman { 2421addfcdbSPierre Ossman int err; 2431addfcdbSPierre Ossman u8 *status; 2441addfcdbSPierre Ossman 2453373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 24617b0429dSPierre Ossman return 0; 2473373c0aeSPierre Ossman 2483373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 24917b0429dSPierre Ossman return 0; 2503373c0aeSPierre Ossman 2511addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 25217b0429dSPierre Ossman return 0; 2531addfcdbSPierre Ossman 2541addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 25517b0429dSPierre Ossman return 0; 2561addfcdbSPierre Ossman 25717b0429dSPierre Ossman err = -EIO; 2581addfcdbSPierre Ossman 2591addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 2601addfcdbSPierre Ossman if (!status) { 261facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 262facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 26317b0429dSPierre Ossman return -ENOMEM; 2641addfcdbSPierre Ossman } 2651addfcdbSPierre Ossman 2667ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 26717b0429dSPierre Ossman if (err) 2687ea239d9SPierre Ossman goto out; 2697ea239d9SPierre Ossman 2707ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 2717ea239d9SPierre Ossman printk(KERN_WARNING "%s: Problem switching card " 2727ea239d9SPierre Ossman "into high-speed mode!\n", 2737ea239d9SPierre Ossman mmc_hostname(card->host)); 2747ea239d9SPierre Ossman } else { 2757ea239d9SPierre Ossman mmc_card_set_highspeed(card); 2767ea239d9SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_SD_HS); 2777ea239d9SPierre Ossman } 2787ea239d9SPierre Ossman 2797ea239d9SPierre Ossman out: 2807ea239d9SPierre Ossman kfree(status); 2817ea239d9SPierre Ossman 2827ea239d9SPierre Ossman return err; 2837ea239d9SPierre Ossman } 2847ea239d9SPierre Ossman 28551ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 28651ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 28751ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 28851ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 28951ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 29051ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 29151ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 29251ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 29351ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 29451ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 29551ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 29651ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 29751ec92e2SPierre Ossman 29851ec92e2SPierre Ossman 29951ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 30051ec92e2SPierre Ossman &dev_attr_cid.attr, 30151ec92e2SPierre Ossman &dev_attr_csd.attr, 30251ec92e2SPierre Ossman &dev_attr_scr.attr, 30351ec92e2SPierre Ossman &dev_attr_date.attr, 30451ec92e2SPierre Ossman &dev_attr_fwrev.attr, 30551ec92e2SPierre Ossman &dev_attr_hwrev.attr, 30651ec92e2SPierre Ossman &dev_attr_manfid.attr, 30751ec92e2SPierre Ossman &dev_attr_name.attr, 30851ec92e2SPierre Ossman &dev_attr_oemid.attr, 30951ec92e2SPierre Ossman &dev_attr_serial.attr, 31051ec92e2SPierre Ossman NULL, 31151ec92e2SPierre Ossman }; 31251ec92e2SPierre Ossman 31351ec92e2SPierre Ossman static struct attribute_group sd_std_attr_group = { 31451ec92e2SPierre Ossman .attrs = sd_std_attrs, 31551ec92e2SPierre Ossman }; 31651ec92e2SPierre Ossman 317a4dbd674SDavid Brownell static const struct attribute_group *sd_attr_groups[] = { 31851ec92e2SPierre Ossman &sd_std_attr_group, 31951ec92e2SPierre Ossman NULL, 32051ec92e2SPierre Ossman }; 32151ec92e2SPierre Ossman 32251ec92e2SPierre Ossman static struct device_type sd_type = { 32351ec92e2SPierre Ossman .groups = sd_attr_groups, 32451ec92e2SPierre Ossman }; 32551ec92e2SPierre Ossman 3267ea239d9SPierre Ossman /* 3276abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 3286abaa0c9SPierre Ossman * 3298769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 3306abaa0c9SPierre Ossman * we're trying to reinitialise. 3316abaa0c9SPierre Ossman */ 3326abaa0c9SPierre Ossman static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 3336abaa0c9SPierre Ossman struct mmc_card *oldcard) 3346abaa0c9SPierre Ossman { 3356abaa0c9SPierre Ossman struct mmc_card *card; 3366abaa0c9SPierre Ossman int err; 3376abaa0c9SPierre Ossman u32 cid[4]; 3386abaa0c9SPierre Ossman unsigned int max_dtr; 3396abaa0c9SPierre Ossman 3406abaa0c9SPierre Ossman BUG_ON(!host); 341d84075c8SPierre Ossman WARN_ON(!host->claimed); 3426abaa0c9SPierre Ossman 3436abaa0c9SPierre Ossman /* 3446abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 3456abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 3466abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 3476abaa0c9SPierre Ossman * respond. 3486abaa0c9SPierre Ossman */ 3496abaa0c9SPierre Ossman mmc_go_idle(host); 3506abaa0c9SPierre Ossman 3516abaa0c9SPierre Ossman /* 3526abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 3536abaa0c9SPierre Ossman * compliant card and we should set bit 30 3546abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 3556abaa0c9SPierre Ossman * block-addressed SDHC cards. 3566abaa0c9SPierre Ossman */ 3576abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 35817b0429dSPierre Ossman if (!err) 3596abaa0c9SPierre Ossman ocr |= 1 << 30; 3606abaa0c9SPierre Ossman 3616abaa0c9SPierre Ossman err = mmc_send_app_op_cond(host, ocr, NULL); 36217b0429dSPierre Ossman if (err) 3636abaa0c9SPierre Ossman goto err; 3646abaa0c9SPierre Ossman 3656abaa0c9SPierre Ossman /* 3666abaa0c9SPierre Ossman * Fetch CID from card. 3676abaa0c9SPierre Ossman */ 368af517150SDavid Brownell if (mmc_host_is_spi(host)) 369af517150SDavid Brownell err = mmc_send_cid(host, cid); 370af517150SDavid Brownell else 3716abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 37217b0429dSPierre Ossman if (err) 3736abaa0c9SPierre Ossman goto err; 3746abaa0c9SPierre Ossman 3756abaa0c9SPierre Ossman if (oldcard) { 376adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 377adf66a0dSPierre Ossman err = -ENOENT; 3786abaa0c9SPierre Ossman goto err; 379adf66a0dSPierre Ossman } 3806abaa0c9SPierre Ossman 3816abaa0c9SPierre Ossman card = oldcard; 3826abaa0c9SPierre Ossman } else { 3836abaa0c9SPierre Ossman /* 3846abaa0c9SPierre Ossman * Allocate card structure. 3856abaa0c9SPierre Ossman */ 38651ec92e2SPierre Ossman card = mmc_alloc_card(host, &sd_type); 387adf66a0dSPierre Ossman if (IS_ERR(card)) { 388adf66a0dSPierre Ossman err = PTR_ERR(card); 3896abaa0c9SPierre Ossman goto err; 390adf66a0dSPierre Ossman } 3916abaa0c9SPierre Ossman 3926abaa0c9SPierre Ossman card->type = MMC_TYPE_SD; 3936abaa0c9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3946abaa0c9SPierre Ossman } 3956abaa0c9SPierre Ossman 3966abaa0c9SPierre Ossman /* 397af517150SDavid Brownell * For native busses: get card RCA and quit open drain mode. 3986abaa0c9SPierre Ossman */ 399af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 4006abaa0c9SPierre Ossman err = mmc_send_relative_addr(host, &card->rca); 40117b0429dSPierre Ossman if (err) 4026abaa0c9SPierre Ossman goto free_card; 4036abaa0c9SPierre Ossman 4046abaa0c9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 405af517150SDavid Brownell } 4066abaa0c9SPierre Ossman 4076abaa0c9SPierre Ossman if (!oldcard) { 4086abaa0c9SPierre Ossman /* 4096abaa0c9SPierre Ossman * Fetch CSD from card. 4106abaa0c9SPierre Ossman */ 4116abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 41217b0429dSPierre Ossman if (err) 4136abaa0c9SPierre Ossman goto free_card; 4146abaa0c9SPierre Ossman 415bd766312SPierre Ossman err = mmc_decode_csd(card); 416adf66a0dSPierre Ossman if (err) 417bd766312SPierre Ossman goto free_card; 418bd766312SPierre Ossman 4196abaa0c9SPierre Ossman mmc_decode_cid(card); 4206abaa0c9SPierre Ossman } 4216abaa0c9SPierre Ossman 4226abaa0c9SPierre Ossman /* 4236abaa0c9SPierre Ossman * Select card, as all following commands rely on that. 4246abaa0c9SPierre Ossman */ 425af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 4266abaa0c9SPierre Ossman err = mmc_select_card(card); 42717b0429dSPierre Ossman if (err) 4286abaa0c9SPierre Ossman goto free_card; 429af517150SDavid Brownell } 4306abaa0c9SPierre Ossman 4316abaa0c9SPierre Ossman if (!oldcard) { 4326abaa0c9SPierre Ossman /* 4336abaa0c9SPierre Ossman * Fetch SCR from card. 4346abaa0c9SPierre Ossman */ 4356abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 43617b0429dSPierre Ossman if (err) 4376abaa0c9SPierre Ossman goto free_card; 4386abaa0c9SPierre Ossman 439bd766312SPierre Ossman err = mmc_decode_scr(card); 440bd766312SPierre Ossman if (err < 0) 441bd766312SPierre Ossman goto free_card; 4426abaa0c9SPierre Ossman 4436abaa0c9SPierre Ossman /* 4446abaa0c9SPierre Ossman * Fetch switch information from card. 4456abaa0c9SPierre Ossman */ 4466abaa0c9SPierre Ossman err = mmc_read_switch(card); 44717b0429dSPierre Ossman if (err) 4486abaa0c9SPierre Ossman goto free_card; 4496abaa0c9SPierre Ossman } 4506abaa0c9SPierre Ossman 4516abaa0c9SPierre Ossman /* 4529d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 4539d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 4549d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 4559d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 4569d9f25c0SWolfgang Muees */ 4579d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 4589d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 4599d9f25c0SWolfgang Muees if (err) 4609d9f25c0SWolfgang Muees goto free_card; 4619d9f25c0SWolfgang Muees } 4629d9f25c0SWolfgang Muees 4639d9f25c0SWolfgang Muees /* 4646abaa0c9SPierre Ossman * Attempt to change to high-speed (if supported) 4656abaa0c9SPierre Ossman */ 4666abaa0c9SPierre Ossman err = mmc_switch_hs(card); 46717b0429dSPierre Ossman if (err) 4686abaa0c9SPierre Ossman goto free_card; 4696abaa0c9SPierre Ossman 4706abaa0c9SPierre Ossman /* 4716abaa0c9SPierre Ossman * Compute bus speed. 4726abaa0c9SPierre Ossman */ 4736abaa0c9SPierre Ossman max_dtr = (unsigned int)-1; 4746abaa0c9SPierre Ossman 4756abaa0c9SPierre Ossman if (mmc_card_highspeed(card)) { 4766abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 4776abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 4786abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 4796abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 4806abaa0c9SPierre Ossman } 4816abaa0c9SPierre Ossman 4826abaa0c9SPierre Ossman mmc_set_clock(host, max_dtr); 4836abaa0c9SPierre Ossman 4846abaa0c9SPierre Ossman /* 4856abaa0c9SPierre Ossman * Switch to wider bus (if supported). 4866abaa0c9SPierre Ossman */ 48771651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 4886abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 4896abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 49017b0429dSPierre Ossman if (err) 4916abaa0c9SPierre Ossman goto free_card; 4926abaa0c9SPierre Ossman 4936abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 4946abaa0c9SPierre Ossman } 4956abaa0c9SPierre Ossman 496c3bff2ecSPierre Ossman /* 497c3bff2ecSPierre Ossman * Check if read-only switch is active. 498c3bff2ecSPierre Ossman */ 499c3bff2ecSPierre Ossman if (!oldcard) { 50008f80bb5SAnton Vorontsov if (!host->ops->get_ro || host->ops->get_ro(host) < 0) { 501c3bff2ecSPierre Ossman printk(KERN_WARNING "%s: host does not " 502c3bff2ecSPierre Ossman "support reading read-only " 503c3bff2ecSPierre Ossman "switch. assuming write-enable.\n", 504c3bff2ecSPierre Ossman mmc_hostname(host)); 505c3bff2ecSPierre Ossman } else { 50608f80bb5SAnton Vorontsov if (host->ops->get_ro(host) > 0) 507c3bff2ecSPierre Ossman mmc_card_set_readonly(card); 508c3bff2ecSPierre Ossman } 509c3bff2ecSPierre Ossman } 510c3bff2ecSPierre Ossman 5116abaa0c9SPierre Ossman if (!oldcard) 5126abaa0c9SPierre Ossman host->card = card; 5136abaa0c9SPierre Ossman 51417b0429dSPierre Ossman return 0; 5156abaa0c9SPierre Ossman 5166abaa0c9SPierre Ossman free_card: 5176abaa0c9SPierre Ossman if (!oldcard) 5186abaa0c9SPierre Ossman mmc_remove_card(card); 5196abaa0c9SPierre Ossman err: 5206abaa0c9SPierre Ossman 521adf66a0dSPierre Ossman return err; 5226abaa0c9SPierre Ossman } 5236abaa0c9SPierre Ossman 5246abaa0c9SPierre Ossman /* 5257ea239d9SPierre Ossman * Host is being removed. Free up the current card. 5267ea239d9SPierre Ossman */ 5277ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 5287ea239d9SPierre Ossman { 5297ea239d9SPierre Ossman BUG_ON(!host); 5307ea239d9SPierre Ossman BUG_ON(!host->card); 5317ea239d9SPierre Ossman 5327ea239d9SPierre Ossman mmc_remove_card(host->card); 5337ea239d9SPierre Ossman host->card = NULL; 5347ea239d9SPierre Ossman } 5357ea239d9SPierre Ossman 5367ea239d9SPierre Ossman /* 5377ea239d9SPierre Ossman * Card detection callback from host. 5387ea239d9SPierre Ossman */ 5397ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 5407ea239d9SPierre Ossman { 5417ea239d9SPierre Ossman int err; 5427ea239d9SPierre Ossman 5437ea239d9SPierre Ossman BUG_ON(!host); 5447ea239d9SPierre Ossman BUG_ON(!host->card); 5457ea239d9SPierre Ossman 5467ea239d9SPierre Ossman mmc_claim_host(host); 5477ea239d9SPierre Ossman 5487ea239d9SPierre Ossman /* 5497ea239d9SPierre Ossman * Just check if our card has been removed. 5507ea239d9SPierre Ossman */ 5517ea239d9SPierre Ossman err = mmc_send_status(host->card, NULL); 5527ea239d9SPierre Ossman 5537ea239d9SPierre Ossman mmc_release_host(host); 5547ea239d9SPierre Ossman 55517b0429dSPierre Ossman if (err) { 5564101c16aSPierre Ossman mmc_sd_remove(host); 5577ea239d9SPierre Ossman 5587ea239d9SPierre Ossman mmc_claim_host(host); 5597ea239d9SPierre Ossman mmc_detach_bus(host); 5607ea239d9SPierre Ossman mmc_release_host(host); 5617ea239d9SPierre Ossman } 5627ea239d9SPierre Ossman } 5637ea239d9SPierre Ossman 5646abaa0c9SPierre Ossman /* 5656abaa0c9SPierre Ossman * Suspend callback from host. 5666abaa0c9SPierre Ossman */ 5676abaa0c9SPierre Ossman static void mmc_sd_suspend(struct mmc_host *host) 5686abaa0c9SPierre Ossman { 5696abaa0c9SPierre Ossman BUG_ON(!host); 5706abaa0c9SPierre Ossman BUG_ON(!host->card); 5716abaa0c9SPierre Ossman 5726abaa0c9SPierre Ossman mmc_claim_host(host); 573af517150SDavid Brownell if (!mmc_host_is_spi(host)) 5746abaa0c9SPierre Ossman mmc_deselect_cards(host); 5756abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5766abaa0c9SPierre Ossman mmc_release_host(host); 5776abaa0c9SPierre Ossman } 5786abaa0c9SPierre Ossman 5796abaa0c9SPierre Ossman /* 5806abaa0c9SPierre Ossman * Resume callback from host. 5816abaa0c9SPierre Ossman * 5826abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5836abaa0c9SPierre Ossman * and, if so, restore all state to it. 5846abaa0c9SPierre Ossman */ 5856abaa0c9SPierre Ossman static void mmc_sd_resume(struct mmc_host *host) 5866abaa0c9SPierre Ossman { 5876abaa0c9SPierre Ossman int err; 5886abaa0c9SPierre Ossman 5896abaa0c9SPierre Ossman BUG_ON(!host); 5906abaa0c9SPierre Ossman BUG_ON(!host->card); 5916abaa0c9SPierre Ossman 5926abaa0c9SPierre Ossman mmc_claim_host(host); 5936abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 5942986d0bfSPierre Ossman mmc_release_host(host); 5952986d0bfSPierre Ossman 59617b0429dSPierre Ossman if (err) { 5974101c16aSPierre Ossman mmc_sd_remove(host); 5982986d0bfSPierre Ossman 5992986d0bfSPierre Ossman mmc_claim_host(host); 6006abaa0c9SPierre Ossman mmc_detach_bus(host); 6012986d0bfSPierre Ossman mmc_release_host(host); 6026abaa0c9SPierre Ossman } 6036abaa0c9SPierre Ossman 6046abaa0c9SPierre Ossman } 6056abaa0c9SPierre Ossman 606*9feae246SAdrian Hunter #ifdef CONFIG_MMC_UNSAFE_RESUME 6076abaa0c9SPierre Ossman 6087ea239d9SPierre Ossman static const struct mmc_bus_ops mmc_sd_ops = { 6097ea239d9SPierre Ossman .remove = mmc_sd_remove, 6107ea239d9SPierre Ossman .detect = mmc_sd_detect, 6116abaa0c9SPierre Ossman .suspend = mmc_sd_suspend, 6126abaa0c9SPierre Ossman .resume = mmc_sd_resume, 6137ea239d9SPierre Ossman }; 6147ea239d9SPierre Ossman 615*9feae246SAdrian Hunter static void mmc_sd_attach_bus_ops(struct mmc_host *host) 616*9feae246SAdrian Hunter { 617*9feae246SAdrian Hunter mmc_attach_bus(host, &mmc_sd_ops); 618*9feae246SAdrian Hunter } 619*9feae246SAdrian Hunter 620*9feae246SAdrian Hunter #else 621*9feae246SAdrian Hunter 622*9feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 623*9feae246SAdrian Hunter .remove = mmc_sd_remove, 624*9feae246SAdrian Hunter .detect = mmc_sd_detect, 625*9feae246SAdrian Hunter .suspend = NULL, 626*9feae246SAdrian Hunter .resume = NULL, 627*9feae246SAdrian Hunter }; 628*9feae246SAdrian Hunter 629*9feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops_unsafe = { 630*9feae246SAdrian Hunter .remove = mmc_sd_remove, 631*9feae246SAdrian Hunter .detect = mmc_sd_detect, 632*9feae246SAdrian Hunter .suspend = mmc_sd_suspend, 633*9feae246SAdrian Hunter .resume = mmc_sd_resume, 634*9feae246SAdrian Hunter }; 635*9feae246SAdrian Hunter 636*9feae246SAdrian Hunter static void mmc_sd_attach_bus_ops(struct mmc_host *host) 637*9feae246SAdrian Hunter { 638*9feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 639*9feae246SAdrian Hunter 640*9feae246SAdrian Hunter if (host->caps & MMC_CAP_NONREMOVABLE) 641*9feae246SAdrian Hunter bus_ops = &mmc_sd_ops_unsafe; 642*9feae246SAdrian Hunter else 643*9feae246SAdrian Hunter bus_ops = &mmc_sd_ops; 644*9feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 645*9feae246SAdrian Hunter } 646*9feae246SAdrian Hunter 647*9feae246SAdrian Hunter #endif 648*9feae246SAdrian Hunter 6497ea239d9SPierre Ossman /* 6507ea239d9SPierre Ossman * Starting point for SD card init. 6517ea239d9SPierre Ossman */ 6527ea239d9SPierre Ossman int mmc_attach_sd(struct mmc_host *host, u32 ocr) 6537ea239d9SPierre Ossman { 6547ea239d9SPierre Ossman int err; 6557ea239d9SPierre Ossman 6567ea239d9SPierre Ossman BUG_ON(!host); 657d84075c8SPierre Ossman WARN_ON(!host->claimed); 6587ea239d9SPierre Ossman 659*9feae246SAdrian Hunter mmc_sd_attach_bus_ops(host); 6607ea239d9SPierre Ossman 66155556da0SPhilip Langdale /* 662af517150SDavid Brownell * We need to get OCR a different way for SPI. 663af517150SDavid Brownell */ 664af517150SDavid Brownell if (mmc_host_is_spi(host)) { 665af517150SDavid Brownell mmc_go_idle(host); 666af517150SDavid Brownell 667af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 668af517150SDavid Brownell if (err) 669af517150SDavid Brownell goto err; 670af517150SDavid Brownell } 671af517150SDavid Brownell 672af517150SDavid Brownell /* 67355556da0SPhilip Langdale * Sanity check the voltages that the card claims to 67455556da0SPhilip Langdale * support. 67555556da0SPhilip Langdale */ 67655556da0SPhilip Langdale if (ocr & 0x7F) { 67755556da0SPhilip Langdale printk(KERN_WARNING "%s: card claims to support voltages " 67855556da0SPhilip Langdale "below the defined range. These will be ignored.\n", 67955556da0SPhilip Langdale mmc_hostname(host)); 68055556da0SPhilip Langdale ocr &= ~0x7F; 68155556da0SPhilip Langdale } 68255556da0SPhilip Langdale 68355556da0SPhilip Langdale if (ocr & MMC_VDD_165_195) { 68455556da0SPhilip Langdale printk(KERN_WARNING "%s: SD card claims to support the " 68555556da0SPhilip Langdale "incompletely defined 'low voltage range'. This " 68655556da0SPhilip Langdale "will be ignored.\n", mmc_hostname(host)); 68755556da0SPhilip Langdale ocr &= ~MMC_VDD_165_195; 68855556da0SPhilip Langdale } 68955556da0SPhilip Langdale 6907ea239d9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 6917ea239d9SPierre Ossman 6927ea239d9SPierre Ossman /* 6937ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 6947ea239d9SPierre Ossman */ 695109b5bedSPierre Ossman if (!host->ocr) { 696109b5bedSPierre Ossman err = -EINVAL; 6977ea239d9SPierre Ossman goto err; 698109b5bedSPierre Ossman } 6997ea239d9SPierre Ossman 7007ea239d9SPierre Ossman /* 7016abaa0c9SPierre Ossman * Detect and init the card. 7027ea239d9SPierre Ossman */ 7036abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 70417b0429dSPierre Ossman if (err) 7057ea239d9SPierre Ossman goto err; 7067ea239d9SPierre Ossman 7077ea239d9SPierre Ossman mmc_release_host(host); 7087ea239d9SPierre Ossman 7094101c16aSPierre Ossman err = mmc_add_card(host->card); 7107ea239d9SPierre Ossman if (err) 7112986d0bfSPierre Ossman goto remove_card; 7127ea239d9SPierre Ossman 7137ea239d9SPierre Ossman return 0; 7147ea239d9SPierre Ossman 7152986d0bfSPierre Ossman remove_card: 7166abaa0c9SPierre Ossman mmc_remove_card(host->card); 7177ea239d9SPierre Ossman host->card = NULL; 7182986d0bfSPierre Ossman mmc_claim_host(host); 7197ea239d9SPierre Ossman err: 7207ea239d9SPierre Ossman mmc_detach_bus(host); 7217ea239d9SPierre Ossman mmc_release_host(host); 7227ea239d9SPierre Ossman 723109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising SD card\n", 724109b5bedSPierre Ossman mmc_hostname(host), err); 725109b5bedSPierre Ossman 726adf66a0dSPierre Ossman return err; 7277ea239d9SPierre Ossman } 7287ea239d9SPierre Ossman 729