17ea239d9SPierre Ossman /* 27ea239d9SPierre Ossman * linux/drivers/mmc/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" 207ea239d9SPierre Ossman #include "sysfs.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: 1027ea239d9SPierre Ossman printk("%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) { 1257ea239d9SPierre Ossman printk("%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 err = MMC_ERR_FAILED; 1677ea239d9SPierre Ossman 1687ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 1697ea239d9SPierre Ossman return MMC_ERR_NONE; 1707ea239d9SPierre Ossman 1717ea239d9SPierre Ossman /* 1727ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1737ea239d9SPierre Ossman * raw block in mmc_card. 1747ea239d9SPierre Ossman */ 1757ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1767ea239d9SPierre Ossman if (!ext_csd) { 1777ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 1787ea239d9SPierre Ossman "receive the ext_csd. mmc v4 cards will be " 1797ea239d9SPierre Ossman "treated as v3.\n", mmc_hostname(card->host)); 1807ea239d9SPierre Ossman return MMC_ERR_FAILED; 1817ea239d9SPierre Ossman } 1827ea239d9SPierre Ossman 1837ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 1847ea239d9SPierre Ossman if (err != MMC_ERR_NONE) { 1857ea239d9SPierre Ossman /* 1867ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1877ea239d9SPierre Ossman * stored in their CSD. 1887ea239d9SPierre Ossman */ 1897ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1907ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1917ea239d9SPierre Ossman "on a possible high capacity card. " 1927ea239d9SPierre Ossman "Card will be ignored.\n", 1937ea239d9SPierre Ossman mmc_hostname(card->host)); 1947ea239d9SPierre Ossman } else { 1957ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 1967ea239d9SPierre Ossman "EXT_CSD, performance might " 1977ea239d9SPierre Ossman "suffer.\n", 1987ea239d9SPierre Ossman mmc_hostname(card->host)); 1997ea239d9SPierre Ossman err = MMC_ERR_NONE; 2007ea239d9SPierre Ossman } 2017ea239d9SPierre Ossman goto out; 2027ea239d9SPierre Ossman } 2037ea239d9SPierre Ossman 2047ea239d9SPierre Ossman card->ext_csd.sectors = 2057ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2067ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2077ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2087ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2097ea239d9SPierre Ossman if (card->ext_csd.sectors) 2107ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 2117ea239d9SPierre Ossman 2127ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2137ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2147ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2157ea239d9SPierre Ossman break; 2167ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2177ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2187ea239d9SPierre Ossman break; 2197ea239d9SPierre Ossman default: 2207ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2217ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2227ea239d9SPierre Ossman "support any high-speed modes.\n", 2237ea239d9SPierre Ossman mmc_hostname(card->host)); 2247ea239d9SPierre Ossman goto out; 2257ea239d9SPierre Ossman } 2267ea239d9SPierre Ossman 2277ea239d9SPierre Ossman out: 2287ea239d9SPierre Ossman kfree(ext_csd); 2297ea239d9SPierre Ossman 2307ea239d9SPierre Ossman return err; 2317ea239d9SPierre Ossman } 2327ea239d9SPierre Ossman 2337ea239d9SPierre Ossman /* 2346abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2356abaa0c9SPierre Ossman * 2366abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2376abaa0c9SPierre Ossman * we're trying to reinitialise. 2387ea239d9SPierre Ossman */ 2396abaa0c9SPierre Ossman static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 2406abaa0c9SPierre Ossman struct mmc_card *oldcard) 2417ea239d9SPierre Ossman { 2427ea239d9SPierre Ossman struct mmc_card *card; 2437ea239d9SPierre Ossman int err; 2447ea239d9SPierre Ossman u32 cid[4]; 2457ea239d9SPierre Ossman unsigned int max_dtr; 2467ea239d9SPierre Ossman 2477ea239d9SPierre Ossman BUG_ON(!host); 2487ea239d9SPierre Ossman BUG_ON(!host->claimed); 2497ea239d9SPierre Ossman 2507ea239d9SPierre Ossman /* 2517ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 2527ea239d9SPierre Ossman * need to tell some cards to go back to the idle 2537ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 2547ea239d9SPierre Ossman * respond. 2557ea239d9SPierre Ossman */ 2567ea239d9SPierre Ossman mmc_go_idle(host); 2577ea239d9SPierre Ossman 2587ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 2596abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 2606abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 2616abaa0c9SPierre Ossman goto err; 2627ea239d9SPierre Ossman 2637ea239d9SPierre Ossman /* 2647ea239d9SPierre Ossman * Fetch CID from card. 2657ea239d9SPierre Ossman */ 2667ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 2677ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 2687ea239d9SPierre Ossman goto err; 2697ea239d9SPierre Ossman 2706abaa0c9SPierre Ossman if (oldcard) { 2716abaa0c9SPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 2726abaa0c9SPierre Ossman goto err; 2736abaa0c9SPierre Ossman 2746abaa0c9SPierre Ossman card = oldcard; 2756abaa0c9SPierre Ossman } else { 2767ea239d9SPierre Ossman /* 2777ea239d9SPierre Ossman * Allocate card structure. 2787ea239d9SPierre Ossman */ 2797ea239d9SPierre Ossman card = mmc_alloc_card(host); 2807ea239d9SPierre Ossman if (IS_ERR(card)) 2817ea239d9SPierre Ossman goto err; 2827ea239d9SPierre Ossman 2837ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 2847ea239d9SPierre Ossman card->rca = 1; 2857ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 2866abaa0c9SPierre Ossman } 2877ea239d9SPierre Ossman 2887ea239d9SPierre Ossman /* 2897ea239d9SPierre Ossman * Set card RCA. 2907ea239d9SPierre Ossman */ 2917ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 2927ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 2937ea239d9SPierre Ossman goto free_card; 2947ea239d9SPierre Ossman 2957ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 2967ea239d9SPierre Ossman 2976abaa0c9SPierre Ossman if (!oldcard) { 2987ea239d9SPierre Ossman /* 2997ea239d9SPierre Ossman * Fetch CSD from card. 3007ea239d9SPierre Ossman */ 3017ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 3027ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3037ea239d9SPierre Ossman goto free_card; 3047ea239d9SPierre Ossman 305bd766312SPierre Ossman err = mmc_decode_csd(card); 306bd766312SPierre Ossman if (err < 0) 307bd766312SPierre Ossman goto free_card; 308bd766312SPierre Ossman err = mmc_decode_cid(card); 309bd766312SPierre Ossman if (err < 0) 310bd766312SPierre Ossman goto free_card; 3116abaa0c9SPierre Ossman } 3127ea239d9SPierre Ossman 3137ea239d9SPierre Ossman /* 31489a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3157ea239d9SPierre Ossman */ 3167ea239d9SPierre Ossman err = mmc_select_card(card); 3177ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3187ea239d9SPierre Ossman goto free_card; 3197ea239d9SPierre Ossman 3206abaa0c9SPierre Ossman if (!oldcard) { 32189a73cf5SPierre Ossman /* 32289a73cf5SPierre Ossman * Fetch and process extened CSD. 32389a73cf5SPierre Ossman */ 32489a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 3257ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3267ea239d9SPierre Ossman goto free_card; 3276abaa0c9SPierre Ossman } 3287ea239d9SPierre Ossman 3297ea239d9SPierre Ossman /* 33089a73cf5SPierre Ossman * Activate high speed (if supported) 33189a73cf5SPierre Ossman */ 33289a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 33389a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 33489a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 33589a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 33689a73cf5SPierre Ossman if (err != MMC_ERR_NONE) 33789a73cf5SPierre Ossman goto free_card; 33889a73cf5SPierre Ossman 33989a73cf5SPierre Ossman mmc_card_set_highspeed(card); 34089a73cf5SPierre Ossman 34189a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 34289a73cf5SPierre Ossman } 34389a73cf5SPierre Ossman 34489a73cf5SPierre Ossman /* 3457ea239d9SPierre Ossman * Compute bus speed. 3467ea239d9SPierre Ossman */ 3477ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 3487ea239d9SPierre Ossman 3497ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 3507ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 3517ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 3527ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 3537ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 3547ea239d9SPierre Ossman } 3557ea239d9SPierre Ossman 3567ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 3577ea239d9SPierre Ossman 35889a73cf5SPierre Ossman /* 35989a73cf5SPierre Ossman * Activate wide bus (if supported). 36089a73cf5SPierre Ossman */ 36189a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 36289a73cf5SPierre Ossman (host->caps & MMC_CAP_4_BIT_DATA)) { 36389a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 36489a73cf5SPierre Ossman EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); 36589a73cf5SPierre Ossman if (err != MMC_ERR_NONE) 36689a73cf5SPierre Ossman goto free_card; 36789a73cf5SPierre Ossman 36889a73cf5SPierre Ossman mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 36989a73cf5SPierre Ossman } 37089a73cf5SPierre Ossman 3716abaa0c9SPierre Ossman if (!oldcard) 3727ea239d9SPierre Ossman host->card = card; 3737ea239d9SPierre Ossman 3746abaa0c9SPierre Ossman return MMC_ERR_NONE; 3756abaa0c9SPierre Ossman 3766abaa0c9SPierre Ossman free_card: 3776abaa0c9SPierre Ossman if (!oldcard) 3786abaa0c9SPierre Ossman mmc_remove_card(card); 3796abaa0c9SPierre Ossman err: 3806abaa0c9SPierre Ossman 3816abaa0c9SPierre Ossman return MMC_ERR_FAILED; 3826abaa0c9SPierre Ossman } 3836abaa0c9SPierre Ossman 3846abaa0c9SPierre Ossman /* 3856abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 3866abaa0c9SPierre Ossman */ 3876abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 3886abaa0c9SPierre Ossman { 3896abaa0c9SPierre Ossman BUG_ON(!host); 3906abaa0c9SPierre Ossman BUG_ON(!host->card); 3916abaa0c9SPierre Ossman 3926abaa0c9SPierre Ossman mmc_remove_card(host->card); 3936abaa0c9SPierre Ossman host->card = NULL; 3946abaa0c9SPierre Ossman } 3956abaa0c9SPierre Ossman 3966abaa0c9SPierre Ossman /* 3976abaa0c9SPierre Ossman * Card detection callback from host. 3986abaa0c9SPierre Ossman */ 3996abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 4006abaa0c9SPierre Ossman { 4016abaa0c9SPierre Ossman int err; 4026abaa0c9SPierre Ossman 4036abaa0c9SPierre Ossman BUG_ON(!host); 4046abaa0c9SPierre Ossman BUG_ON(!host->card); 4056abaa0c9SPierre Ossman 4066abaa0c9SPierre Ossman mmc_claim_host(host); 4076abaa0c9SPierre Ossman 4086abaa0c9SPierre Ossman /* 4096abaa0c9SPierre Ossman * Just check if our card has been removed. 4106abaa0c9SPierre Ossman */ 4116abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 4126abaa0c9SPierre Ossman 4137ea239d9SPierre Ossman mmc_release_host(host); 4147ea239d9SPierre Ossman 4156abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) { 4166abaa0c9SPierre Ossman mmc_remove_card(host->card); 4176abaa0c9SPierre Ossman host->card = NULL; 4186abaa0c9SPierre Ossman 4196abaa0c9SPierre Ossman mmc_claim_host(host); 4206abaa0c9SPierre Ossman mmc_detach_bus(host); 4216abaa0c9SPierre Ossman mmc_release_host(host); 4226abaa0c9SPierre Ossman } 4236abaa0c9SPierre Ossman } 4246abaa0c9SPierre Ossman 4256abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 4266abaa0c9SPierre Ossman 4276abaa0c9SPierre Ossman /* 4286abaa0c9SPierre Ossman * Suspend callback from host. 4296abaa0c9SPierre Ossman */ 4306abaa0c9SPierre Ossman static void mmc_suspend(struct mmc_host *host) 4316abaa0c9SPierre Ossman { 4326abaa0c9SPierre Ossman BUG_ON(!host); 4336abaa0c9SPierre Ossman BUG_ON(!host->card); 4346abaa0c9SPierre Ossman 4356abaa0c9SPierre Ossman mmc_claim_host(host); 4366abaa0c9SPierre Ossman mmc_deselect_cards(host); 4376abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 4386abaa0c9SPierre Ossman mmc_release_host(host); 4396abaa0c9SPierre Ossman } 4406abaa0c9SPierre Ossman 4416abaa0c9SPierre Ossman /* 4426abaa0c9SPierre Ossman * Resume callback from host. 4436abaa0c9SPierre Ossman * 4446abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 4456abaa0c9SPierre Ossman * and, if so, restore all state to it. 4466abaa0c9SPierre Ossman */ 4476abaa0c9SPierre Ossman static void mmc_resume(struct mmc_host *host) 4486abaa0c9SPierre Ossman { 4496abaa0c9SPierre Ossman int err; 4506abaa0c9SPierre Ossman 4516abaa0c9SPierre Ossman BUG_ON(!host); 4526abaa0c9SPierre Ossman BUG_ON(!host->card); 4536abaa0c9SPierre Ossman 4546abaa0c9SPierre Ossman mmc_claim_host(host); 4556abaa0c9SPierre Ossman 4566abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 4576abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) { 4586abaa0c9SPierre Ossman mmc_remove_card(host->card); 4596abaa0c9SPierre Ossman host->card = NULL; 4606abaa0c9SPierre Ossman 4616abaa0c9SPierre Ossman mmc_detach_bus(host); 4626abaa0c9SPierre Ossman } 4636abaa0c9SPierre Ossman 4646abaa0c9SPierre Ossman mmc_release_host(host); 4656abaa0c9SPierre Ossman } 4666abaa0c9SPierre Ossman 4676abaa0c9SPierre Ossman #else 4686abaa0c9SPierre Ossman 4696abaa0c9SPierre Ossman #define mmc_suspend NULL 4706abaa0c9SPierre Ossman #define mmc_resume NULL 4716abaa0c9SPierre Ossman 4726abaa0c9SPierre Ossman #endif 4736abaa0c9SPierre Ossman 4746abaa0c9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 4756abaa0c9SPierre Ossman .remove = mmc_remove, 4766abaa0c9SPierre Ossman .detect = mmc_detect, 4776abaa0c9SPierre Ossman .suspend = mmc_suspend, 4786abaa0c9SPierre Ossman .resume = mmc_resume, 4796abaa0c9SPierre Ossman }; 4806abaa0c9SPierre Ossman 4816abaa0c9SPierre Ossman /* 4826abaa0c9SPierre Ossman * Starting point for MMC card init. 4836abaa0c9SPierre Ossman */ 4846abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 4856abaa0c9SPierre Ossman { 4866abaa0c9SPierre Ossman int err; 4876abaa0c9SPierre Ossman 4886abaa0c9SPierre Ossman BUG_ON(!host); 4896abaa0c9SPierre Ossman BUG_ON(!host->claimed); 4906abaa0c9SPierre Ossman 4916abaa0c9SPierre Ossman mmc_attach_bus(host, &mmc_ops); 4926abaa0c9SPierre Ossman 4936abaa0c9SPierre Ossman /* 4946abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 4956abaa0c9SPierre Ossman * support. 4966abaa0c9SPierre Ossman */ 4976abaa0c9SPierre Ossman if (ocr & 0x7F) { 4986abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 4996abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 5006abaa0c9SPierre Ossman mmc_hostname(host)); 5016abaa0c9SPierre Ossman ocr &= ~0x7F; 5026abaa0c9SPierre Ossman } 5036abaa0c9SPierre Ossman 5046abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 5056abaa0c9SPierre Ossman 5066abaa0c9SPierre Ossman /* 5076abaa0c9SPierre Ossman * Can we support the voltage of the card? 5086abaa0c9SPierre Ossman */ 5096abaa0c9SPierre Ossman if (!host->ocr) 5106abaa0c9SPierre Ossman goto err; 5116abaa0c9SPierre Ossman 5126abaa0c9SPierre Ossman /* 5136abaa0c9SPierre Ossman * Detect and init the card. 5146abaa0c9SPierre Ossman */ 5156abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 5166abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 5176abaa0c9SPierre Ossman goto err; 5186abaa0c9SPierre Ossman 5196abaa0c9SPierre Ossman mmc_release_host(host); 5206abaa0c9SPierre Ossman 5216abaa0c9SPierre Ossman err = mmc_register_card(host->card); 5227ea239d9SPierre Ossman if (err) 5237ea239d9SPierre Ossman goto reclaim_host; 5247ea239d9SPierre Ossman 5257ea239d9SPierre Ossman return 0; 5267ea239d9SPierre Ossman 5277ea239d9SPierre Ossman reclaim_host: 5287ea239d9SPierre Ossman mmc_claim_host(host); 5296abaa0c9SPierre Ossman mmc_remove_card(host->card); 5307ea239d9SPierre Ossman host->card = NULL; 5317ea239d9SPierre Ossman err: 5327ea239d9SPierre Ossman mmc_detach_bus(host); 5337ea239d9SPierre Ossman mmc_release_host(host); 5347ea239d9SPierre Ossman 5357ea239d9SPierre Ossman return 0; 5367ea239d9SPierre Ossman } 5377ea239d9SPierre Ossman 538