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> 147ea239d9SPierre Ossman 157ea239d9SPierre Ossman #include <linux/mmc/host.h> 167ea239d9SPierre Ossman #include <linux/mmc/card.h> 177ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 187ea239d9SPierre Ossman 197ea239d9SPierre Ossman #include "core.h" 204101c16aSPierre Ossman #include "bus.h" 217ea239d9SPierre Ossman #include "mmc_ops.h" 227ea239d9SPierre Ossman 237ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 247ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 257ea239d9SPierre Ossman 0, 0, 0, 0 267ea239d9SPierre Ossman }; 277ea239d9SPierre Ossman 287ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 297ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 307ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 317ea239d9SPierre Ossman }; 327ea239d9SPierre Ossman 337ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 347ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 357ea239d9SPierre Ossman }; 367ea239d9SPierre Ossman 377ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 387ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 397ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 407ea239d9SPierre Ossman }; 417ea239d9SPierre Ossman 427ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 437ea239d9SPierre Ossman ({ \ 447ea239d9SPierre Ossman const int __size = size; \ 457ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 467ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 477ea239d9SPierre Ossman const int __shft = (start) & 31; \ 487ea239d9SPierre Ossman u32 __res; \ 497ea239d9SPierre Ossman \ 507ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 517ea239d9SPierre Ossman if (__size + __shft > 32) \ 527ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 537ea239d9SPierre Ossman __res & __mask; \ 547ea239d9SPierre Ossman }) 557ea239d9SPierre Ossman 567ea239d9SPierre Ossman /* 577ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 587ea239d9SPierre Ossman */ 59bd766312SPierre Ossman static int mmc_decode_cid(struct mmc_card *card) 607ea239d9SPierre Ossman { 617ea239d9SPierre Ossman u32 *resp = card->raw_cid; 627ea239d9SPierre Ossman 637ea239d9SPierre Ossman /* 647ea239d9SPierre Ossman * The selection of the format here is based upon published 657ea239d9SPierre Ossman * specs from sandisk and from what people have reported. 667ea239d9SPierre Ossman */ 677ea239d9SPierre Ossman switch (card->csd.mmca_vsn) { 687ea239d9SPierre Ossman case 0: /* MMC v1.0 - v1.2 */ 697ea239d9SPierre Ossman case 1: /* MMC v1.4 */ 707ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); 717ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 727ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 737ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 747ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 757ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 767ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 777ea239d9SPierre Ossman card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); 787ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); 797ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); 807ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 24); 817ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 827ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 837ea239d9SPierre Ossman break; 847ea239d9SPierre Ossman 857ea239d9SPierre Ossman case 2: /* MMC v2.0 - v2.2 */ 867ea239d9SPierre Ossman case 3: /* MMC v3.1 - v3.3 */ 877ea239d9SPierre Ossman case 4: /* MMC v4 */ 887ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 897ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 907ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 917ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 927ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 937ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 947ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 957ea239d9SPierre Ossman card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); 967ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 16, 32); 977ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 12, 4); 987ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; 997ea239d9SPierre Ossman break; 1007ea239d9SPierre Ossman 1017ea239d9SPierre Ossman default: 102facba917SPierre Ossman printk(KERN_ERR "%s: card has unknown MMCA version %d\n", 1037ea239d9SPierre Ossman mmc_hostname(card->host), card->csd.mmca_vsn); 104bd766312SPierre Ossman return -EINVAL; 1057ea239d9SPierre Ossman } 106bd766312SPierre Ossman 107bd766312SPierre Ossman return 0; 1087ea239d9SPierre Ossman } 1097ea239d9SPierre Ossman 1107ea239d9SPierre Ossman /* 1117ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1127ea239d9SPierre Ossman */ 113bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 1147ea239d9SPierre Ossman { 1157ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1167ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1177ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1187ea239d9SPierre Ossman 1197ea239d9SPierre Ossman /* 1207ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1217ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1227ea239d9SPierre Ossman */ 1237ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1247ea239d9SPierre Ossman if (csd_struct != 1 && csd_struct != 2) { 125facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1267ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 127bd766312SPierre Ossman return -EINVAL; 1287ea239d9SPierre Ossman } 1297ea239d9SPierre Ossman 1307ea239d9SPierre Ossman csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); 1317ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1327ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1337ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1347ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1357ea239d9SPierre Ossman 1367ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1377ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1387ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1397ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1407ea239d9SPierre Ossman 1417ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1427ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1437ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1447ea239d9SPierre Ossman 1457ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1467ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1477ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1487ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1497ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1507ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1517ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 152bd766312SPierre Ossman 153bd766312SPierre Ossman return 0; 1547ea239d9SPierre Ossman } 1557ea239d9SPierre Ossman 1567ea239d9SPierre Ossman /* 15789a73cf5SPierre Ossman * Read and decode extended CSD. 1587ea239d9SPierre Ossman */ 15989a73cf5SPierre Ossman static int mmc_read_ext_csd(struct mmc_card *card) 1607ea239d9SPierre Ossman { 1617ea239d9SPierre Ossman int err; 1627ea239d9SPierre Ossman u8 *ext_csd; 1637ea239d9SPierre Ossman 1647ea239d9SPierre Ossman BUG_ON(!card); 1657ea239d9SPierre Ossman 1667ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 16717b0429dSPierre Ossman return 0; 1687ea239d9SPierre Ossman 1697ea239d9SPierre Ossman /* 1707ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1717ea239d9SPierre Ossman * raw block in mmc_card. 1727ea239d9SPierre Ossman */ 1737ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1747ea239d9SPierre Ossman if (!ext_csd) { 1757ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 176adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 17717b0429dSPierre Ossman return -ENOMEM; 1787ea239d9SPierre Ossman } 1797ea239d9SPierre Ossman 1807ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 18117b0429dSPierre Ossman if (err) { 1827ea239d9SPierre Ossman /* 183adf66a0dSPierre Ossman * We all hosts that cannot perform the command 184adf66a0dSPierre Ossman * to fail more gracefully 185adf66a0dSPierre Ossman */ 186adf66a0dSPierre Ossman if (err != -EINVAL) 187adf66a0dSPierre Ossman goto out; 188adf66a0dSPierre Ossman 189adf66a0dSPierre Ossman /* 1907ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1917ea239d9SPierre Ossman * stored in their CSD. 1927ea239d9SPierre Ossman */ 1937ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1947ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1957ea239d9SPierre Ossman "on a possible high capacity card. " 1967ea239d9SPierre Ossman "Card will be ignored.\n", 1977ea239d9SPierre Ossman mmc_hostname(card->host)); 1987ea239d9SPierre Ossman } else { 1997ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2007ea239d9SPierre Ossman "EXT_CSD, performance might " 2017ea239d9SPierre Ossman "suffer.\n", 2027ea239d9SPierre Ossman mmc_hostname(card->host)); 20317b0429dSPierre Ossman err = 0; 2047ea239d9SPierre Ossman } 205adf66a0dSPierre Ossman 2067ea239d9SPierre Ossman goto out; 2077ea239d9SPierre Ossman } 2087ea239d9SPierre Ossman 209b1ebe384SJarkko Lavinen card->ext_csd.rev = ext_csd[EXT_CSD_REV]; 210b1ebe384SJarkko Lavinen if (card->ext_csd.rev > 3) { 2118fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2128fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 213b1ebe384SJarkko Lavinen card->ext_csd.rev); 21400cedfa6SFlorin Malita err = -EINVAL; 21500cedfa6SFlorin Malita goto out; 216d7604d76SPierre Ossman } 217d7604d76SPierre Ossman 218b1ebe384SJarkko Lavinen if (card->ext_csd.rev >= 2) { 2197ea239d9SPierre Ossman card->ext_csd.sectors = 2207ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2217ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2227ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2237ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2247ea239d9SPierre Ossman if (card->ext_csd.sectors) 2257ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 226d7604d76SPierre Ossman } 2277ea239d9SPierre Ossman 2287ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2297ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2307ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2317ea239d9SPierre Ossman break; 2327ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2337ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2347ea239d9SPierre Ossman break; 2357ea239d9SPierre Ossman default: 2367ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2377ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2387ea239d9SPierre Ossman "support any high-speed modes.\n", 2397ea239d9SPierre Ossman mmc_hostname(card->host)); 2407ea239d9SPierre Ossman goto out; 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); 41917b0429dSPierre Ossman if (err) 42089a73cf5SPierre Ossman goto free_card; 42189a73cf5SPierre Ossman 42289a73cf5SPierre Ossman mmc_card_set_highspeed(card); 42389a73cf5SPierre Ossman 42489a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 42589a73cf5SPierre Ossman } 42689a73cf5SPierre Ossman 42789a73cf5SPierre Ossman /* 4287ea239d9SPierre Ossman * Compute bus speed. 4297ea239d9SPierre Ossman */ 4307ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 4317ea239d9SPierre Ossman 4327ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 4337ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 4347ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 4357ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 4367ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 4377ea239d9SPierre Ossman } 4387ea239d9SPierre Ossman 4397ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 4407ea239d9SPierre Ossman 44189a73cf5SPierre Ossman /* 44289a73cf5SPierre Ossman * Activate wide bus (if supported). 44389a73cf5SPierre Ossman */ 44489a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 445b30f8af3SJarkko Lavinen (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { 446b30f8af3SJarkko Lavinen unsigned ext_csd_bit, bus_width; 447b30f8af3SJarkko Lavinen 448b30f8af3SJarkko Lavinen if (host->caps & MMC_CAP_8_BIT_DATA) { 449b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_8; 450b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_8; 451b30f8af3SJarkko Lavinen } else { 452b30f8af3SJarkko Lavinen ext_csd_bit = EXT_CSD_BUS_WIDTH_4; 453b30f8af3SJarkko Lavinen bus_width = MMC_BUS_WIDTH_4; 454b30f8af3SJarkko Lavinen } 455b30f8af3SJarkko Lavinen 45689a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 457b30f8af3SJarkko Lavinen EXT_CSD_BUS_WIDTH, ext_csd_bit); 458b30f8af3SJarkko Lavinen 45917b0429dSPierre Ossman if (err) 46089a73cf5SPierre Ossman goto free_card; 46189a73cf5SPierre Ossman 462b30f8af3SJarkko Lavinen mmc_set_bus_width(card->host, bus_width); 46389a73cf5SPierre Ossman } 46489a73cf5SPierre Ossman 4656abaa0c9SPierre Ossman if (!oldcard) 4667ea239d9SPierre Ossman host->card = card; 4677ea239d9SPierre Ossman 46817b0429dSPierre Ossman return 0; 4696abaa0c9SPierre Ossman 4706abaa0c9SPierre Ossman free_card: 4716abaa0c9SPierre Ossman if (!oldcard) 4726abaa0c9SPierre Ossman mmc_remove_card(card); 4736abaa0c9SPierre Ossman err: 4746abaa0c9SPierre Ossman 475adf66a0dSPierre Ossman return err; 4766abaa0c9SPierre Ossman } 4776abaa0c9SPierre Ossman 4786abaa0c9SPierre Ossman /* 4796abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 4806abaa0c9SPierre Ossman */ 4816abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 4826abaa0c9SPierre Ossman { 4836abaa0c9SPierre Ossman BUG_ON(!host); 4846abaa0c9SPierre Ossman BUG_ON(!host->card); 4856abaa0c9SPierre Ossman 4866abaa0c9SPierre Ossman mmc_remove_card(host->card); 4876abaa0c9SPierre Ossman host->card = NULL; 4886abaa0c9SPierre Ossman } 4896abaa0c9SPierre Ossman 4906abaa0c9SPierre Ossman /* 4916abaa0c9SPierre Ossman * Card detection callback from host. 4926abaa0c9SPierre Ossman */ 4936abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 4946abaa0c9SPierre Ossman { 4956abaa0c9SPierre Ossman int err; 4966abaa0c9SPierre Ossman 4976abaa0c9SPierre Ossman BUG_ON(!host); 4986abaa0c9SPierre Ossman BUG_ON(!host->card); 4996abaa0c9SPierre Ossman 5006abaa0c9SPierre Ossman mmc_claim_host(host); 5016abaa0c9SPierre Ossman 5026abaa0c9SPierre Ossman /* 5036abaa0c9SPierre Ossman * Just check if our card has been removed. 5046abaa0c9SPierre Ossman */ 5056abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 5066abaa0c9SPierre Ossman 5077ea239d9SPierre Ossman mmc_release_host(host); 5087ea239d9SPierre Ossman 50917b0429dSPierre Ossman if (err) { 5104101c16aSPierre Ossman mmc_remove(host); 5116abaa0c9SPierre Ossman 5126abaa0c9SPierre Ossman mmc_claim_host(host); 5136abaa0c9SPierre Ossman mmc_detach_bus(host); 5146abaa0c9SPierre Ossman mmc_release_host(host); 5156abaa0c9SPierre Ossman } 5166abaa0c9SPierre Ossman } 5176abaa0c9SPierre Ossman 5186abaa0c9SPierre Ossman /* 5196abaa0c9SPierre Ossman * Suspend callback from host. 5206abaa0c9SPierre Ossman */ 5216abaa0c9SPierre Ossman static void mmc_suspend(struct mmc_host *host) 5226abaa0c9SPierre Ossman { 5236abaa0c9SPierre Ossman BUG_ON(!host); 5246abaa0c9SPierre Ossman BUG_ON(!host->card); 5256abaa0c9SPierre Ossman 5266abaa0c9SPierre Ossman mmc_claim_host(host); 527af517150SDavid Brownell if (!mmc_host_is_spi(host)) 5286abaa0c9SPierre Ossman mmc_deselect_cards(host); 5296abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5306abaa0c9SPierre Ossman mmc_release_host(host); 5316abaa0c9SPierre Ossman } 5326abaa0c9SPierre Ossman 5336abaa0c9SPierre Ossman /* 5346abaa0c9SPierre Ossman * Resume callback from host. 5356abaa0c9SPierre Ossman * 5366abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5376abaa0c9SPierre Ossman * and, if so, restore all state to it. 5386abaa0c9SPierre Ossman */ 5396abaa0c9SPierre Ossman static void mmc_resume(struct mmc_host *host) 5406abaa0c9SPierre Ossman { 5416abaa0c9SPierre Ossman int err; 5426abaa0c9SPierre Ossman 5436abaa0c9SPierre Ossman BUG_ON(!host); 5446abaa0c9SPierre Ossman BUG_ON(!host->card); 5456abaa0c9SPierre Ossman 5466abaa0c9SPierre Ossman mmc_claim_host(host); 5478c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 5482986d0bfSPierre Ossman mmc_release_host(host); 5492986d0bfSPierre Ossman 55017b0429dSPierre Ossman if (err) { 5514101c16aSPierre Ossman mmc_remove(host); 5522986d0bfSPierre Ossman 5532986d0bfSPierre Ossman mmc_claim_host(host); 5546abaa0c9SPierre Ossman mmc_detach_bus(host); 5552986d0bfSPierre Ossman mmc_release_host(host); 5566abaa0c9SPierre Ossman } 5576abaa0c9SPierre Ossman 5586abaa0c9SPierre Ossman } 5596abaa0c9SPierre Ossman 560eae1aeeeSAdrian Hunter static void mmc_power_restore(struct mmc_host *host) 561eae1aeeeSAdrian Hunter { 562eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 563eae1aeeeSAdrian Hunter mmc_claim_host(host); 564eae1aeeeSAdrian Hunter mmc_init_card(host, host->ocr, host->card); 565eae1aeeeSAdrian Hunter mmc_release_host(host); 566eae1aeeeSAdrian Hunter } 567eae1aeeeSAdrian Hunter 568b1ebe384SJarkko Lavinen static int mmc_sleep(struct mmc_host *host) 569b1ebe384SJarkko Lavinen { 570b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 571b1ebe384SJarkko Lavinen int err = -ENOSYS; 572b1ebe384SJarkko Lavinen 573b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 574b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 1); 575b1ebe384SJarkko Lavinen if (err < 0) 576b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while putting card into sleep", 577b1ebe384SJarkko Lavinen mmc_hostname(host), err); 578b1ebe384SJarkko Lavinen } 579b1ebe384SJarkko Lavinen 580b1ebe384SJarkko Lavinen return err; 581b1ebe384SJarkko Lavinen } 582b1ebe384SJarkko Lavinen 583b1ebe384SJarkko Lavinen static int mmc_awake(struct mmc_host *host) 584b1ebe384SJarkko Lavinen { 585b1ebe384SJarkko Lavinen struct mmc_card *card = host->card; 586b1ebe384SJarkko Lavinen int err = -ENOSYS; 587b1ebe384SJarkko Lavinen 588b1ebe384SJarkko Lavinen if (card && card->ext_csd.rev >= 3) { 589b1ebe384SJarkko Lavinen err = mmc_card_sleepawake(host, 0); 590b1ebe384SJarkko Lavinen if (err < 0) 591b1ebe384SJarkko Lavinen pr_debug("%s: Error %d while awaking sleeping card", 592b1ebe384SJarkko Lavinen mmc_hostname(host), err); 593b1ebe384SJarkko Lavinen } 594b1ebe384SJarkko Lavinen 595b1ebe384SJarkko Lavinen return err; 596b1ebe384SJarkko Lavinen } 597b1ebe384SJarkko Lavinen 5989feae246SAdrian Hunter #ifdef CONFIG_MMC_UNSAFE_RESUME 5996abaa0c9SPierre Ossman 6006abaa0c9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 601b1ebe384SJarkko Lavinen .awake = mmc_awake, 602b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 6036abaa0c9SPierre Ossman .remove = mmc_remove, 6046abaa0c9SPierre Ossman .detect = mmc_detect, 6056abaa0c9SPierre Ossman .suspend = mmc_suspend, 6066abaa0c9SPierre Ossman .resume = mmc_resume, 607eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 6086abaa0c9SPierre Ossman }; 6096abaa0c9SPierre Ossman 6109feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 6119feae246SAdrian Hunter { 6129feae246SAdrian Hunter mmc_attach_bus(host, &mmc_ops); 6139feae246SAdrian Hunter } 6149feae246SAdrian Hunter 6159feae246SAdrian Hunter #else 6169feae246SAdrian Hunter 6179feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops = { 618b1ebe384SJarkko Lavinen .awake = mmc_awake, 619b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 6209feae246SAdrian Hunter .remove = mmc_remove, 6219feae246SAdrian Hunter .detect = mmc_detect, 6229feae246SAdrian Hunter .suspend = NULL, 6239feae246SAdrian Hunter .resume = NULL, 624eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 6259feae246SAdrian Hunter }; 6269feae246SAdrian Hunter 6279feae246SAdrian Hunter static const struct mmc_bus_ops mmc_ops_unsafe = { 628b1ebe384SJarkko Lavinen .awake = mmc_awake, 629b1ebe384SJarkko Lavinen .sleep = mmc_sleep, 6309feae246SAdrian Hunter .remove = mmc_remove, 6319feae246SAdrian Hunter .detect = mmc_detect, 6329feae246SAdrian Hunter .suspend = mmc_suspend, 6339feae246SAdrian Hunter .resume = mmc_resume, 634eae1aeeeSAdrian Hunter .power_restore = mmc_power_restore, 6359feae246SAdrian Hunter }; 6369feae246SAdrian Hunter 6379feae246SAdrian Hunter static void mmc_attach_bus_ops(struct mmc_host *host) 6389feae246SAdrian Hunter { 6399feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 6409feae246SAdrian Hunter 6419feae246SAdrian Hunter if (host->caps & MMC_CAP_NONREMOVABLE) 6429feae246SAdrian Hunter bus_ops = &mmc_ops_unsafe; 6439feae246SAdrian Hunter else 6449feae246SAdrian Hunter bus_ops = &mmc_ops; 6459feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 6469feae246SAdrian Hunter } 6479feae246SAdrian Hunter 6489feae246SAdrian Hunter #endif 6499feae246SAdrian Hunter 6506abaa0c9SPierre Ossman /* 6516abaa0c9SPierre Ossman * Starting point for MMC card init. 6526abaa0c9SPierre Ossman */ 6536abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 6546abaa0c9SPierre Ossman { 6556abaa0c9SPierre Ossman int err; 6566abaa0c9SPierre Ossman 6576abaa0c9SPierre Ossman BUG_ON(!host); 658d84075c8SPierre Ossman WARN_ON(!host->claimed); 6596abaa0c9SPierre Ossman 6609feae246SAdrian Hunter mmc_attach_bus_ops(host); 6616abaa0c9SPierre Ossman 6626abaa0c9SPierre Ossman /* 663af517150SDavid Brownell * We need to get OCR a different way for SPI. 664af517150SDavid Brownell */ 665af517150SDavid Brownell if (mmc_host_is_spi(host)) { 666af517150SDavid Brownell err = mmc_spi_read_ocr(host, 1, &ocr); 667af517150SDavid Brownell if (err) 668af517150SDavid Brownell goto err; 669af517150SDavid Brownell } 670af517150SDavid Brownell 671af517150SDavid Brownell /* 6726abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 6736abaa0c9SPierre Ossman * support. 6746abaa0c9SPierre Ossman */ 6756abaa0c9SPierre Ossman if (ocr & 0x7F) { 6766abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 6776abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 6786abaa0c9SPierre Ossman mmc_hostname(host)); 6796abaa0c9SPierre Ossman ocr &= ~0x7F; 6806abaa0c9SPierre Ossman } 6816abaa0c9SPierre Ossman 6826abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 6836abaa0c9SPierre Ossman 6846abaa0c9SPierre Ossman /* 6856abaa0c9SPierre Ossman * Can we support the voltage of the card? 6866abaa0c9SPierre Ossman */ 687109b5bedSPierre Ossman if (!host->ocr) { 688109b5bedSPierre Ossman err = -EINVAL; 6896abaa0c9SPierre Ossman goto err; 690109b5bedSPierre Ossman } 6916abaa0c9SPierre Ossman 6926abaa0c9SPierre Ossman /* 6936abaa0c9SPierre Ossman * Detect and init the card. 6946abaa0c9SPierre Ossman */ 6958c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 69617b0429dSPierre Ossman if (err) 6976abaa0c9SPierre Ossman goto err; 6986abaa0c9SPierre Ossman 6996abaa0c9SPierre Ossman mmc_release_host(host); 7006abaa0c9SPierre Ossman 7014101c16aSPierre Ossman err = mmc_add_card(host->card); 7027ea239d9SPierre Ossman if (err) 7032986d0bfSPierre Ossman goto remove_card; 7047ea239d9SPierre Ossman 7057ea239d9SPierre Ossman return 0; 7067ea239d9SPierre Ossman 7072986d0bfSPierre Ossman remove_card: 7086abaa0c9SPierre Ossman mmc_remove_card(host->card); 7097ea239d9SPierre Ossman host->card = NULL; 7102986d0bfSPierre Ossman mmc_claim_host(host); 7117ea239d9SPierre Ossman err: 7127ea239d9SPierre Ossman mmc_detach_bus(host); 7137ea239d9SPierre Ossman mmc_release_host(host); 7147ea239d9SPierre Ossman 715109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 716109b5bedSPierre Ossman mmc_hostname(host), err); 717109b5bedSPierre Ossman 718adf66a0dSPierre Ossman return err; 7197ea239d9SPierre Ossman } 720