17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/mmc.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. 67ea239d9SPierre Ossman * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. 77ea239d9SPierre Ossman * 87ea239d9SPierre Ossman * This program is free software; you can redistribute it and/or modify 97ea239d9SPierre Ossman * it under the terms of the GNU General Public License version 2 as 107ea239d9SPierre Ossman * published by the Free Software Foundation. 117ea239d9SPierre Ossman */ 127ea239d9SPierre Ossman 137ea239d9SPierre Ossman #include <linux/err.h> 145a0e3ad6STejun Heo #include <linux/slab.h> 157ea239d9SPierre Ossman 167ea239d9SPierre Ossman #include <linux/mmc/host.h> 177ea239d9SPierre Ossman #include <linux/mmc/card.h> 187ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 197ea239d9SPierre Ossman 207ea239d9SPierre Ossman #include "core.h" 214101c16aSPierre Ossman #include "bus.h" 227ea239d9SPierre Ossman #include "mmc_ops.h" 237ea239d9SPierre Ossman 247ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 257ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 267ea239d9SPierre Ossman 0, 0, 0, 0 277ea239d9SPierre Ossman }; 287ea239d9SPierre Ossman 297ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 307ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 317ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 327ea239d9SPierre Ossman }; 337ea239d9SPierre Ossman 347ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 357ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 367ea239d9SPierre Ossman }; 377ea239d9SPierre Ossman 387ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 397ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 407ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 417ea239d9SPierre Ossman }; 427ea239d9SPierre Ossman 437ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 447ea239d9SPierre Ossman ({ \ 457ea239d9SPierre Ossman const int __size = size; \ 467ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 477ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 487ea239d9SPierre Ossman const int __shft = (start) & 31; \ 497ea239d9SPierre Ossman u32 __res; \ 507ea239d9SPierre Ossman \ 517ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 527ea239d9SPierre Ossman if (__size + __shft > 32) \ 537ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 547ea239d9SPierre Ossman __res & __mask; \ 557ea239d9SPierre Ossman }) 567ea239d9SPierre Ossman 577ea239d9SPierre Ossman /* 587ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 597ea239d9SPierre Ossman */ 60bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 617ea239d9SPierre Ossman { 627ea239d9SPierre Ossman u32 *resp = card->raw_cid; 637ea239d9SPierre Ossman 647ea239d9SPierre Ossman /* 657ea239d9SPierre Ossman * The selection of the format here is based upon published 667ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 677ea239d9SPierre Ossman */ 687ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 697ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 707ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 717ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 727ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 737ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 747ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 757ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 767ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 777ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 787ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 797ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 807ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 817ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 827ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 837ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 847ea239d9SPierre Ossman break; 857ea239d9SPierre Ossman 867ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 877ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 887ea239d9SPierre Ossman case 4: /* MMC v4 */ 897ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 907ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 917ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 927ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 937ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 947ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 957ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 967ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 977ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 987ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 997ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 1007ea239d9SPierre Ossman break; 1017ea239d9SPierre Ossman 1027ea239d9SPierre Ossman default: 103facba917SPierre Ossman printk(KERN_ERR "%s: card has unknown MMCA version %d\n", 1047ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 105bd766312SPierre Ossman return -EINVAL; 1067ea239d9SPierre Ossman } 107bd766312SPierre Ossman 108bd766312SPierre Ossman return 0; 1097ea239d9SPierre Ossman } 1107ea239d9SPierre Ossman 1117ea239d9SPierre Ossman /* 1127ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1137ea239d9SPierre Ossman */ 114bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1157ea239d9SPierre Ossman { 1167ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1177ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1187ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1197ea239d9SPierre Ossman 1207ea239d9SPierre Ossman /* 1217ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1227ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1237ea239d9SPierre Ossman */ 1247ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1257ea239d9SPierre Ossman if (csd_struct != 1 && csd_struct != 2) { 126facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1277ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 128bd766312SPierre Ossman return -EINVAL; 1297ea239d9SPierre Ossman } 1307ea239d9SPierre Ossman 1317ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1327ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1337ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1347ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1357ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1367ea239d9SPierre Ossman 1377ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1387ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1397ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1407ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1417ea239d9SPierre Ossman 1427ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1437ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1447ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1457ea239d9SPierre Ossman 1467ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1477ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1487ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1497ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1507ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1517ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1527ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 153bd766312SPierre Ossman 154bd766312SPierre Ossman return 0; 1557ea239d9SPierre Ossman } 1567ea239d9SPierre Ossman 1577ea239d9SPierre Ossman /* 15889a73cf5SPierre Ossman * Read and decode extended CSD. 1597ea239d9SPierre Ossman */ 16089a73cf5SPierre Ossman static int mmc_read_ext_csd(struct mmc_card *card) 1617ea239d9SPierre Ossman { 1627ea239d9SPierre Ossman int err; 1637ea239d9SPierre Ossman u8 *ext_csd; 1647ea239d9SPierre Ossman 1657ea239d9SPierre Ossman BUG_ON(!card); 1667ea239d9SPierre Ossman 1677ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 16817b0429dSPierre Ossman return 0; 1697ea239d9SPierre Ossman 1707ea239d9SPierre Ossman /* 1717ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1727ea239d9SPierre Ossman * raw block in mmc_card. 1737ea239d9SPierre Ossman */ 1747ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1757ea239d9SPierre Ossman if (!ext_csd) { 1767ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 177adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 17817b0429dSPierre Ossman return -ENOMEM; 1797ea239d9SPierre Ossman } 1807ea239d9SPierre Ossman 1817ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 18217b0429dSPierre Ossman if (err) { 183d08ebeddSWolfgang Muees /* If the host or the card can't do the switch, 184d08ebeddSWolfgang Muees * fail more gracefully. */ 185d08ebeddSWolfgang Muees if ((err != -EINVAL) 186d08ebeddSWolfgang Muees && (err != -ENOSYS) 187d08ebeddSWolfgang Muees && (err != -EFAULT)) 188adf66a0dSPierre Ossman goto out; 189adf66a0dSPierre Ossman 190adf66a0dSPierre Ossman /* 1917ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1927ea239d9SPierre Ossman * stored in their CSD. 1937ea239d9SPierre Ossman */ 1947ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1957ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1967ea239d9SPierre Ossman "on a possible high capacity card. " 1977ea239d9SPierre Ossman "Card will be ignored.\n", 1987ea239d9SPierre Ossman mmc_hostname(card->host)); 1997ea239d9SPierre Ossman } else { 2007ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2017ea239d9SPierre Ossman "EXT_CSD, performance might " 2027ea239d9SPierre Ossman "suffer.\n", 2037ea239d9SPierre Ossman mmc_hostname(card->host)); 20417b0429dSPierre Ossman err = 0; 2057ea239d9SPierre Ossman } 206adf66a0dSPierre Ossman 2077ea239d9SPierre Ossman goto out; 2087ea239d9SPierre Ossman } 2097ea239d9SPierre Ossman 210b1ebe384SJarkko Lavinen card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 21111723ab1SAdrian Hunter if (card->ext_csd.rev > 5) { 2128fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2138fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 214b1ebe384SJarkko Lavinen card->ext_csd.rev); 21500cedfa6SFlorin Malita err = -EINVAL; 21600cedfa6SFlorin Malita goto out; 217d7604d76SPierre Ossman } 218d7604d76SPierre Ossman 219b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2207ea239d9SPierre Ossman card->ext_csd.sectors = 2217ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2227ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2237ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2247ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2257ea239d9SPierre Ossman if (card->ext_csd.sectors) 2267ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 227d7604d76SPierre Ossman } 2287ea239d9SPierre Ossman 2297198f3c9SAdrian Hunter switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { 2307ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2317ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2327ea239d9SPierre Ossman break; 2337ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2347ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2357ea239d9SPierre Ossman break; 2367ea239d9SPierre Ossman default: 2377ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2387ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2397ea239d9SPierre Ossman "support any high-speed modes.\n", 2407ea239d9SPierre Ossman mmc_hostname(card->host)); 2417ea239d9SPierre Ossman } 2427ea239d9SPierre Ossman 243b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 3) { 244b1ebe384SJarkko Lavinen u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; 245b1ebe384SJarkko Lavinen 246b1ebe384SJarkko Lavinen /* Sleep / awake timeout in 100ns units */ 247b1ebe384SJarkko Lavinen if (sa_shift > 0 && sa_shift <= 0x17) 248b1ebe384SJarkko Lavinen card->ext_csd.sa_timeout = 249b1ebe384SJarkko Lavinen 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; 250b1ebe384SJarkko Lavinen } 251b1ebe384SJarkko Lavinen 2527ea239d9SPierre Ossman out: 2537ea239d9SPierre Ossman kfree(ext_csd); 2547ea239d9SPierre Ossman 2557ea239d9SPierre Ossman return err; 2567ea239d9SPierre Ossman } 2577ea239d9SPierre Ossman 25851ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 25951ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 26051ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 26151ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 26251ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 26351ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 26451ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 26551ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 26651ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 26751ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 26851ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 26951ec92e2SPierre Ossman 27051ec92e2SPierre Ossman static struct attribute *mmc_std_attrs[] = { 27151ec92e2SPierre Ossman &dev_attr_cid.attr, 27251ec92e2SPierre Ossman &dev_attr_csd.attr, 27351ec92e2SPierre Ossman &dev_attr_date.attr, 27451ec92e2SPierre Ossman &dev_attr_fwrev.attr, 27551ec92e2SPierre Ossman &dev_attr_hwrev.attr, 27651ec92e2SPierre Ossman &dev_attr_manfid.attr, 27751ec92e2SPierre Ossman &dev_attr_name.attr, 27851ec92e2SPierre Ossman &dev_attr_oemid.attr, 27951ec92e2SPierre Ossman &dev_attr_serial.attr, 28051ec92e2SPierre Ossman NULL, 28151ec92e2SPierre Ossman }; 28251ec92e2SPierre Ossman 28351ec92e2SPierre Ossman static struct attribute_group mmc_std_attr_group = { 28451ec92e2SPierre Ossman .attrs = mmc_std_attrs, 28551ec92e2SPierre Ossman }; 28651ec92e2SPierre Ossman 287a4dbd674SDavid Brownell static const struct attribute_group *mmc_attr_groups[] = { 28851ec92e2SPierre Ossman &mmc_std_attr_group, 28951ec92e2SPierre Ossman NULL, 29051ec92e2SPierre Ossman }; 29151ec92e2SPierre Ossman 29251ec92e2SPierre Ossman static struct device_type mmc_type = { 29351ec92e2SPierre Ossman .groups = mmc_attr_groups, 29451ec92e2SPierre Ossman }; 29551ec92e2SPierre Ossman 2967ea239d9SPierre Ossman /* 2976abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2986abaa0c9SPierre Ossman * 2998769392bSDeepak Saxena * In the case of a resume, "oldcard" will contain the card 3006abaa0c9SPierre Ossman * we're trying to reinitialise. 3017ea239d9SPierre Ossman */ 3028c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 3036abaa0c9SPierre Ossman struct mmc_card *oldcard) 3047ea239d9SPierre Ossman { 3057ea239d9SPierre Ossman struct mmc_card *card; 3067ea239d9SPierre Ossman int err; 3077ea239d9SPierre Ossman u32 cid[4]; 3087ea239d9SPierre Ossman unsigned int max_dtr; 3097ea239d9SPierre Ossman 3107ea239d9SPierre Ossman BUG_ON(!host); 311d84075c8SPierre Ossman WARN_ON(!host->claimed); 3127ea239d9SPierre Ossman 3137ea239d9SPierre Ossman /* 3147ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 3157ea239d9SPierre Ossman * need to tell some cards to go back to the idle 3167ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 3177ea239d9SPierre Ossman * respond. 3187ea239d9SPierre Ossman */ 3197ea239d9SPierre Ossman mmc_go_idle(host); 3207ea239d9SPierre Ossman 3217ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 3226abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 32317b0429dSPierre Ossman if (err) 3246abaa0c9SPierre Ossman goto err; 3257ea239d9SPierre Ossman 3267ea239d9SPierre Ossman /* 327af517150SDavid Brownell * For SPI, enable CRC as appropriate. 328af517150SDavid Brownell */ 329af517150SDavid Brownell if (mmc_host_is_spi(host)) { 330af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 331af517150SDavid Brownell if (err) 332af517150SDavid Brownell goto err; 333af517150SDavid Brownell } 334af517150SDavid Brownell 335af517150SDavid Brownell /* 3367ea239d9SPierre Ossman * Fetch CID from card. 3377ea239d9SPierre Ossman */ 338af517150SDavid Brownell if (mmc_host_is_spi(host)) 339af517150SDavid Brownell err = mmc_send_cid(host, cid); 340af517150SDavid Brownell else 3417ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 34217b0429dSPierre Ossman if (err) 3437ea239d9SPierre Ossman goto err; 3447ea239d9SPierre Ossman 3456abaa0c9SPierre Ossman if (oldcard) { 346adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 347adf66a0dSPierre Ossman err = -ENOENT; 3486abaa0c9SPierre Ossman goto err; 349adf66a0dSPierre Ossman } 3506abaa0c9SPierre Ossman 3516abaa0c9SPierre Ossman card = oldcard; 3526abaa0c9SPierre Ossman } else { 3537ea239d9SPierre Ossman /* 3547ea239d9SPierre Ossman * Allocate card structure. 3557ea239d9SPierre Ossman */ 35651ec92e2SPierre Ossman card = mmc_alloc_card(host, &mmc_type); 357adf66a0dSPierre Ossman if (IS_ERR(card)) { 358adf66a0dSPierre Ossman err = PTR_ERR(card); 3597ea239d9SPierre Ossman goto err; 360adf66a0dSPierre Ossman } 3617ea239d9SPierre Ossman 3627ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 3637ea239d9SPierre Ossman card->rca = 1; 3647ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3656abaa0c9SPierre Ossman } 3667ea239d9SPierre Ossman 3677ea239d9SPierre Ossman /* 368af517150SDavid Brownell * For native busses: set card RCA and quit open drain mode. 3697ea239d9SPierre Ossman */ 370af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 3717ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 37217b0429dSPierre Ossman if (err) 3737ea239d9SPierre Ossman goto free_card; 3747ea239d9SPierre Ossman 3757ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 376af517150SDavid Brownell } 3777ea239d9SPierre Ossman 3786abaa0c9SPierre Ossman if (!oldcard) { 3797ea239d9SPierre Ossman /* 3807ea239d9SPierre Ossman * Fetch CSD from card. 3817ea239d9SPierre Ossman */ 3827ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 38317b0429dSPierre Ossman if (err) 3847ea239d9SPierre Ossman goto free_card; 3857ea239d9SPierre Ossman 386bd766312SPierre Ossman err = mmc_decode_csd(card); 387adf66a0dSPierre Ossman if (err) 388bd766312SPierre Ossman goto free_card; 389bd766312SPierre Ossman err = mmc_decode_cid(card); 390adf66a0dSPierre Ossman if (err) 391bd766312SPierre Ossman goto free_card; 3926abaa0c9SPierre Ossman } 3937ea239d9SPierre Ossman 3947ea239d9SPierre Ossman /* 39589a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3967ea239d9SPierre Ossman */ 397af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 3987ea239d9SPierre Ossman err = mmc_select_card(card); 39917b0429dSPierre Ossman if (err) 4007ea239d9SPierre Ossman goto free_card; 401af517150SDavid Brownell } 4027ea239d9SPierre Ossman 4036abaa0c9SPierre Ossman if (!oldcard) { 40489a73cf5SPierre Ossman /* 405af517150SDavid Brownell * Fetch and process extended CSD. 40689a73cf5SPierre Ossman */ 40789a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 40817b0429dSPierre Ossman if (err) 4097ea239d9SPierre Ossman goto free_card; 4106abaa0c9SPierre Ossman } 4117ea239d9SPierre Ossman 4127ea239d9SPierre Ossman /* 41389a73cf5SPierre Ossman * Activate high speed (if supported) 41489a73cf5SPierre Ossman */ 41589a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 41689a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 41789a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 41889a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 419ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 42089a73cf5SPierre Ossman goto free_card; 42189a73cf5SPierre Ossman 422ef0b27d4SAdrian Hunter if (err) { 423ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to highspeed failed\n", 424ef0b27d4SAdrian Hunter mmc_hostname(card->host)); 425ef0b27d4SAdrian Hunter err = 0; 426ef0b27d4SAdrian Hunter } else { 42789a73cf5SPierre Ossman mmc_card_set_highspeed(card); 42889a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 42989a73cf5SPierre Ossman } 430ef0b27d4SAdrian Hunter } 43189a73cf5SPierre Ossman 43289a73cf5SPierre Ossman /* 4337ea239d9SPierre Ossman * Compute bus speed. 4347ea239d9SPierre Ossman */ 4357ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 4367ea239d9SPierre Ossman 4377ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 4387ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 4397ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 4407ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 4417ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 4427ea239d9SPierre Ossman } 4437ea239d9SPierre Ossman 4447ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 4457ea239d9SPierre Ossman 44689a73cf5SPierre Ossman /* 44789a73cf5SPierre Ossman * Activate wide bus (if supported). 44889a73cf5SPierre Ossman */ 44989a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 450b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 451b30f8af3SJarkko Lavinen unsigned ext_csd_bit, bus_width; 452b30f8af3SJarkko Lavinen 453b30f8af3SJarkko Lavinen if (host->caps & MMC_CAP_8_BIT_DATA) { 454b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_8; 455b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_8; 456b30f8af3SJarkko Lavinen } else { 457b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_4; 458b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_4; 459b30f8af3SJarkko Lavinen } 460b30f8af3SJarkko Lavinen 46189a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 462b30f8af3SJarkko Lavinen EXT_CSD_BUS_WIDTH, ext_csd_bit); 463b30f8af3SJarkko Lavinen 464ef0b27d4SAdrian Hunter if (err && err != -EBADMSG) 46589a73cf5SPierre Ossman goto free_card; 46689a73cf5SPierre Ossman 467ef0b27d4SAdrian Hunter if (err) { 468ef0b27d4SAdrian Hunter printk(KERN_WARNING "%s: switch to bus width %d " 469ef0b27d4SAdrian Hunter "failed\n", mmc_hostname(card->host), 470ef0b27d4SAdrian Hunter 1 << bus_width); 471ef0b27d4SAdrian Hunter err = 0; 472ef0b27d4SAdrian Hunter } else { 473b30f8af3SJarkko Lavinen mmc_set_bus_width(card->host, bus_width); 47489a73cf5SPierre Ossman } 475ef0b27d4SAdrian Hunter } 47689a73cf5SPierre Ossman 4776abaa0c9SPierre Ossman if (!oldcard) 4787ea239d9SPierre Ossman host->card = card; 4797ea239d9SPierre Ossman 48017b0429dSPierre Ossman return 0; 4816abaa0c9SPierre Ossman 4826abaa0c9SPierre Ossman free_card: 4836abaa0c9SPierre Ossman if (!oldcard) 4846abaa0c9SPierre Ossman mmc_remove_card(card); 4856abaa0c9SPierre Ossman err: 4866abaa0c9SPierre Ossman 487adf66a0dSPierre Ossman return err; 4886abaa0c9SPierre Ossman } 4896abaa0c9SPierre Ossman 4906abaa0c9SPierre Ossman /* 4916abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 4926abaa0c9SPierre Ossman */ 4936abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 4946abaa0c9SPierre Ossman { 4956abaa0c9SPierre Ossman BUG_ON(!host); 4966abaa0c9SPierre Ossman BUG_ON(!host->card); 4976abaa0c9SPierre Ossman 4986abaa0c9SPierre Ossman mmc_remove_card(host->card); 4996abaa0c9SPierre Ossman host->card = NULL; 5006abaa0c9SPierre Ossman } 5016abaa0c9SPierre Ossman 5026abaa0c9SPierre Ossman /* 5036abaa0c9SPierre Ossman * Card detection callback from host. 5046abaa0c9SPierre Ossman */ 5056abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 5066abaa0c9SPierre Ossman { 5076abaa0c9SPierre Ossman int err; 5086abaa0c9SPierre Ossman 5096abaa0c9SPierre Ossman BUG_ON(!host); 5106abaa0c9SPierre Ossman BUG_ON(!host->card); 5116abaa0c9SPierre Ossman 5126abaa0c9SPierre Ossman mmc_claim_host(host); 5136abaa0c9SPierre Ossman 5146abaa0c9SPierre Ossman /* 5156abaa0c9SPierre Ossman * Just check if our card has been removed. 5166abaa0c9SPierre Ossman */ 5176abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 5186abaa0c9SPierre Ossman 5197ea239d9SPierre Ossman mmc_release_host(host); 5207ea239d9SPierre Ossman 52117b0429dSPierre Ossman if (err) { 5224101c16aSPierre Ossman mmc_remove(host); 5236abaa0c9SPierre Ossman 5246abaa0c9SPierre Ossman mmc_claim_host(host); 5256abaa0c9SPierre Ossman mmc_detach_bus(host); 5266abaa0c9SPierre Ossman mmc_release_host(host); 5276abaa0c9SPierre Ossman } 5286abaa0c9SPierre Ossman } 5296abaa0c9SPierre Ossman 5306abaa0c9SPierre Ossman /* 5316abaa0c9SPierre Ossman * Suspend callback from host. 5326abaa0c9SPierre Ossman */ 53395cdfb72SNicolas Pitre static int mmc_suspend(struct mmc_host *host) 5346abaa0c9SPierre Ossman { 5356abaa0c9SPierre Ossman BUG_ON(!host); 5366abaa0c9SPierre Ossman BUG_ON(!host->card); 5376abaa0c9SPierre Ossman 5386abaa0c9SPierre Ossman mmc_claim_host(host); 539af517150SDavid Brownell if (!mmc_host_is_spi(host)) 5406abaa0c9SPierre Ossman mmc_deselect_cards(host); 5416abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5426abaa0c9SPierre Ossman mmc_release_host(host); 54395cdfb72SNicolas Pitre 54495cdfb72SNicolas Pitre return 0; 5456abaa0c9SPierre Ossman } 5466abaa0c9SPierre Ossman 5476abaa0c9SPierre Ossman /* 5486abaa0c9SPierre Ossman * Resume callback from host. 5496abaa0c9SPierre Ossman * 5506abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5516abaa0c9SPierre Ossman * and, if so, restore all state to it. 5526abaa0c9SPierre Ossman */ 55395cdfb72SNicolas Pitre static int mmc_resume(struct mmc_host *host) 5546abaa0c9SPierre Ossman { 5556abaa0c9SPierre Ossman int err; 5566abaa0c9SPierre Ossman 5576abaa0c9SPierre Ossman BUG_ON(!host); 5586abaa0c9SPierre Ossman BUG_ON(!host->card); 5596abaa0c9SPierre Ossman 5606abaa0c9SPierre Ossman mmc_claim_host(host); 5618c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 5622986d0bfSPierre Ossman mmc_release_host(host); 5632986d0bfSPierre Ossman 56495cdfb72SNicolas Pitre return err; 5656abaa0c9SPierre Ossman } 5666abaa0c9SPierre Ossman 567eae1aeeeSAdrian Hunter static void mmc_power_restore(struct mmc_host *host) 568eae1aeeeSAdrian Hunter { 569eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 570eae1aeeeSAdrian Hunter mmc_claim_host(host); 571eae1aeeeSAdrian Hunter mmc_init_card(host, host->ocr, host->card); 572eae1aeeeSAdrian Hunter mmc_release_host(host); 573eae1aeeeSAdrian Hunter } 574eae1aeeeSAdrian Hunter 575b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 576b1ebe384SJarkko Lavinen { 577b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 578b1ebe384SJarkko Lavinen int err = -ENOSYS; 579b1ebe384SJarkko Lavinen 580b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 581b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 582b1ebe384SJarkko Lavinen if (err < 0) 583b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 584b1ebe384SJarkko Lavinen mmc_hostname(host), err); 585b1ebe384SJarkko Lavinen } 586b1ebe384SJarkko Lavinen 587b1ebe384SJarkko Lavinen return err; 588b1ebe384SJarkko Lavinen } 589b1ebe384SJarkko Lavinen 590b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 591b1ebe384SJarkko Lavinen { 592b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 593b1ebe384SJarkko Lavinen int err = -ENOSYS; 594b1ebe384SJarkko Lavinen 595b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 596b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 597b1ebe384SJarkko Lavinen if (err < 0) 598b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 599b1ebe384SJarkko Lavinen mmc_hostname(host), err); 600b1ebe384SJarkko Lavinen } 601b1ebe384SJarkko Lavinen 602b1ebe384SJarkko Lavinen return err; 603b1ebe384SJarkko Lavinen } 604b1ebe384SJarkko Lavinen 6059feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 606b1ebe384SJarkko Lavinen .awake = mmc_awake, 607b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 6089feae246SAdrian Hunter .remove = mmc_remove, 6099feae246SAdrian Hunter .detect = mmc_detect, 6109feae246SAdrian Hunter .suspend = NULL, 6119feae246SAdrian Hunter .resume = NULL, 612eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 6139feae246SAdrian Hunter }; 6149feae246SAdrian Hunter 6159feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 616b1ebe384SJarkko Lavinen .awake = mmc_awake, 617b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 6189feae246SAdrian Hunter .remove = mmc_remove, 6199feae246SAdrian Hunter .detect = mmc_detect, 6209feae246SAdrian Hunter .suspend = mmc_suspend, 6219feae246SAdrian Hunter .resume = mmc_resume, 622eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 6239feae246SAdrian Hunter }; 6249feae246SAdrian Hunter 6259feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 6269feae246SAdrian Hunter { 6279feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 6289feae246SAdrian Hunter 629bd68e083SBen Hutchings if (host->caps & MMC_CAP_NONREMOVABLE || !mmc_assume_removable) 6309feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 6319feae246SAdrian Hunter else 6329feae246SAdrian Hunter bus_ops = &mmc_ops; 6339feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 6349feae246SAdrian Hunter } 6359feae246SAdrian Hunter 6366abaa0c9SPierre Ossman /* 6376abaa0c9SPierre Ossman * Starting point for MMC card init. 6386abaa0c9SPierre Ossman */ 6396abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 6406abaa0c9SPierre Ossman { 6416abaa0c9SPierre Ossman int err; 6426abaa0c9SPierre Ossman 6436abaa0c9SPierre Ossman BUG_ON(!host); 644d84075c8SPierre Ossman WARN_ON(!host->claimed); 6456abaa0c9SPierre Ossman 6469feae246SAdrian Hunter mmc_attach_bus_ops(host); 6476abaa0c9SPierre Ossman 6486abaa0c9SPierre Ossman /* 649af517150SDavid Brownell * We need to get OCR a different way for SPI. 650af517150SDavid Brownell */ 651af517150SDavid Brownell if (mmc_host_is_spi(host)) { 652af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 653af517150SDavid Brownell if (err) 654af517150SDavid Brownell goto err; 655af517150SDavid Brownell } 656af517150SDavid Brownell 657af517150SDavid Brownell /* 6586abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 6596abaa0c9SPierre Ossman * support. 6606abaa0c9SPierre Ossman */ 6616abaa0c9SPierre Ossman if (ocr & 0x7F) { 6626abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 6636abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 6646abaa0c9SPierre Ossman mmc_hostname(host)); 6656abaa0c9SPierre Ossman ocr &= ~0x7F; 6666abaa0c9SPierre Ossman } 6676abaa0c9SPierre Ossman 6686abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 6696abaa0c9SPierre Ossman 6706abaa0c9SPierre Ossman /* 6716abaa0c9SPierre Ossman * Can we support the voltage of the card? 6726abaa0c9SPierre Ossman */ 673109b5bedSPierre Ossman if (!host->ocr) { 674109b5bedSPierre Ossman err = -EINVAL; 6756abaa0c9SPierre Ossman goto err; 676109b5bedSPierre Ossman } 6776abaa0c9SPierre Ossman 6786abaa0c9SPierre Ossman /* 6796abaa0c9SPierre Ossman * Detect and init the card. 6806abaa0c9SPierre Ossman */ 6818c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 68217b0429dSPierre Ossman if (err) 6836abaa0c9SPierre Ossman goto err; 6846abaa0c9SPierre Ossman 6856abaa0c9SPierre Ossman mmc_release_host(host); 6866abaa0c9SPierre Ossman 6874101c16aSPierre Ossman err = mmc_add_card(host->card); 6887ea239d9SPierre Ossman if (err) 6892986d0bfSPierre Ossman goto remove_card; 6907ea239d9SPierre Ossman 6917ea239d9SPierre Ossman return 0; 6927ea239d9SPierre Ossman 6932986d0bfSPierre Ossman remove_card: 6946abaa0c9SPierre Ossman mmc_remove_card(host->card); 6957ea239d9SPierre Ossman host->card = NULL; 6962986d0bfSPierre Ossman mmc_claim_host(host); 6977ea239d9SPierre Ossman err: 6987ea239d9SPierre Ossman mmc_detach_bus(host); 6997ea239d9SPierre Ossman mmc_release_host(host); 7007ea239d9SPierre Ossman 701109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 702109b5bedSPierre Ossman mmc_hostname(host), err); 703109b5bedSPierre Ossman 704adf66a0dSPierre Ossman return err; 7057ea239d9SPierre Ossman } 706