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" 207ea239d9SPierre Ossman #include "sysfs.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 16717b0429dSPierre Ossman err = -EIO; 1687ea239d9SPierre Ossman 1697ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 17017b0429dSPierre Ossman return 0; 1717ea239d9SPierre Ossman 1727ea239d9SPierre Ossman /* 1737ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1747ea239d9SPierre Ossman * raw block in mmc_card. 1757ea239d9SPierre Ossman */ 1767ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1777ea239d9SPierre Ossman if (!ext_csd) { 1787ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 1797ea239d9SPierre Ossman "receive the ext_csd. mmc v4 cards will be " 1807ea239d9SPierre Ossman "treated as v3.\n", mmc_hostname(card->host)); 18117b0429dSPierre Ossman return -ENOMEM; 1827ea239d9SPierre Ossman } 1837ea239d9SPierre Ossman 1847ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 18517b0429dSPierre Ossman if (err) { 1867ea239d9SPierre Ossman /* 1877ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1887ea239d9SPierre Ossman * stored in their CSD. 1897ea239d9SPierre Ossman */ 1907ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1917ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1927ea239d9SPierre Ossman "on a possible high capacity card. " 1937ea239d9SPierre Ossman "Card will be ignored.\n", 1947ea239d9SPierre Ossman mmc_hostname(card->host)); 1957ea239d9SPierre Ossman } else { 1967ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 1977ea239d9SPierre Ossman "EXT_CSD, performance might " 1987ea239d9SPierre Ossman "suffer.\n", 1997ea239d9SPierre Ossman mmc_hostname(card->host)); 20017b0429dSPierre Ossman err = 0; 2017ea239d9SPierre Ossman } 2027ea239d9SPierre Ossman goto out; 2037ea239d9SPierre Ossman } 2047ea239d9SPierre Ossman 2057ea239d9SPierre Ossman card->ext_csd.sectors = 2067ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2077ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2087ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2097ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2107ea239d9SPierre Ossman if (card->ext_csd.sectors) 2117ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 2127ea239d9SPierre Ossman 2137ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2147ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2157ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2167ea239d9SPierre Ossman break; 2177ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2187ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2197ea239d9SPierre Ossman break; 2207ea239d9SPierre Ossman default: 2217ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2227ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2237ea239d9SPierre Ossman "support any high-speed modes.\n", 2247ea239d9SPierre Ossman mmc_hostname(card->host)); 2257ea239d9SPierre Ossman goto out; 2267ea239d9SPierre Ossman } 2277ea239d9SPierre Ossman 2287ea239d9SPierre Ossman out: 2297ea239d9SPierre Ossman kfree(ext_csd); 2307ea239d9SPierre Ossman 2317ea239d9SPierre Ossman return err; 2327ea239d9SPierre Ossman } 2337ea239d9SPierre Ossman 2347ea239d9SPierre Ossman /* 2356abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2366abaa0c9SPierre Ossman * 2376abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2386abaa0c9SPierre Ossman * we're trying to reinitialise. 2397ea239d9SPierre Ossman */ 2408c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 2416abaa0c9SPierre Ossman struct mmc_card *oldcard) 2427ea239d9SPierre Ossman { 2437ea239d9SPierre Ossman struct mmc_card *card; 2447ea239d9SPierre Ossman int err; 2457ea239d9SPierre Ossman u32 cid[4]; 2467ea239d9SPierre Ossman unsigned int max_dtr; 2477ea239d9SPierre Ossman 2487ea239d9SPierre Ossman BUG_ON(!host); 2497ea239d9SPierre Ossman BUG_ON(!host->claimed); 2507ea239d9SPierre Ossman 2517ea239d9SPierre Ossman /* 2527ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 2537ea239d9SPierre Ossman * need to tell some cards to go back to the idle 2547ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 2557ea239d9SPierre Ossman * respond. 2567ea239d9SPierre Ossman */ 2577ea239d9SPierre Ossman mmc_go_idle(host); 2587ea239d9SPierre Ossman 2597ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 2606abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 26117b0429dSPierre Ossman if (err) 2626abaa0c9SPierre Ossman goto err; 2637ea239d9SPierre Ossman 2647ea239d9SPierre Ossman /* 2657ea239d9SPierre Ossman * Fetch CID from card. 2667ea239d9SPierre Ossman */ 2677ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 26817b0429dSPierre Ossman if (err) 2697ea239d9SPierre Ossman goto err; 2707ea239d9SPierre Ossman 2716abaa0c9SPierre Ossman if (oldcard) { 2726abaa0c9SPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 2736abaa0c9SPierre Ossman goto err; 2746abaa0c9SPierre Ossman 2756abaa0c9SPierre Ossman card = oldcard; 2766abaa0c9SPierre Ossman } else { 2777ea239d9SPierre Ossman /* 2787ea239d9SPierre Ossman * Allocate card structure. 2797ea239d9SPierre Ossman */ 2807ea239d9SPierre Ossman card = mmc_alloc_card(host); 2817ea239d9SPierre Ossman if (IS_ERR(card)) 2827ea239d9SPierre Ossman goto err; 2837ea239d9SPierre Ossman 2847ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 2857ea239d9SPierre Ossman card->rca = 1; 2867ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 2876abaa0c9SPierre Ossman } 2887ea239d9SPierre Ossman 2897ea239d9SPierre Ossman /* 2907ea239d9SPierre Ossman * Set card RCA. 2917ea239d9SPierre Ossman */ 2927ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 29317b0429dSPierre Ossman if (err) 2947ea239d9SPierre Ossman goto free_card; 2957ea239d9SPierre Ossman 2967ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 2977ea239d9SPierre Ossman 2986abaa0c9SPierre Ossman if (!oldcard) { 2997ea239d9SPierre Ossman /* 3007ea239d9SPierre Ossman * Fetch CSD from card. 3017ea239d9SPierre Ossman */ 3027ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 30317b0429dSPierre Ossman if (err) 3047ea239d9SPierre Ossman goto free_card; 3057ea239d9SPierre Ossman 306bd766312SPierre Ossman err = mmc_decode_csd(card); 307bd766312SPierre Ossman if (err < 0) 308bd766312SPierre Ossman goto free_card; 309bd766312SPierre Ossman err = mmc_decode_cid(card); 310bd766312SPierre Ossman if (err < 0) 311bd766312SPierre Ossman goto free_card; 3126abaa0c9SPierre Ossman } 3137ea239d9SPierre Ossman 3147ea239d9SPierre Ossman /* 31589a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3167ea239d9SPierre Ossman */ 3177ea239d9SPierre Ossman err = mmc_select_card(card); 31817b0429dSPierre Ossman if (err) 3197ea239d9SPierre Ossman goto free_card; 3207ea239d9SPierre Ossman 3216abaa0c9SPierre Ossman if (!oldcard) { 32289a73cf5SPierre Ossman /* 32389a73cf5SPierre Ossman * Fetch and process extened CSD. 32489a73cf5SPierre Ossman */ 32589a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 32617b0429dSPierre Ossman if (err) 3277ea239d9SPierre Ossman goto free_card; 3286abaa0c9SPierre Ossman } 3297ea239d9SPierre Ossman 3307ea239d9SPierre Ossman /* 33189a73cf5SPierre Ossman * Activate high speed (if supported) 33289a73cf5SPierre Ossman */ 33389a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 33489a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 33589a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 33689a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 33717b0429dSPierre Ossman if (err) 33889a73cf5SPierre Ossman goto free_card; 33989a73cf5SPierre Ossman 34089a73cf5SPierre Ossman mmc_card_set_highspeed(card); 34189a73cf5SPierre Ossman 34289a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 34389a73cf5SPierre Ossman } 34489a73cf5SPierre Ossman 34589a73cf5SPierre Ossman /* 3467ea239d9SPierre Ossman * Compute bus speed. 3477ea239d9SPierre Ossman */ 3487ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 3497ea239d9SPierre Ossman 3507ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 3517ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 3527ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 3537ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 3547ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 3557ea239d9SPierre Ossman } 3567ea239d9SPierre Ossman 3577ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 3587ea239d9SPierre Ossman 35989a73cf5SPierre Ossman /* 36089a73cf5SPierre Ossman * Activate wide bus (if supported). 36189a73cf5SPierre Ossman */ 36289a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 36389a73cf5SPierre Ossman (host->caps & MMC_CAP_4_BIT_DATA)) { 36489a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 36589a73cf5SPierre Ossman EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); 36617b0429dSPierre Ossman if (err) 36789a73cf5SPierre Ossman goto free_card; 36889a73cf5SPierre Ossman 36989a73cf5SPierre Ossman mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 37089a73cf5SPierre Ossman } 37189a73cf5SPierre Ossman 3726abaa0c9SPierre Ossman if (!oldcard) 3737ea239d9SPierre Ossman host->card = card; 3747ea239d9SPierre Ossman 37517b0429dSPierre Ossman return 0; 3766abaa0c9SPierre Ossman 3776abaa0c9SPierre Ossman free_card: 3786abaa0c9SPierre Ossman if (!oldcard) 3796abaa0c9SPierre Ossman mmc_remove_card(card); 3806abaa0c9SPierre Ossman err: 3816abaa0c9SPierre Ossman 38217b0429dSPierre Ossman return -EIO; 3836abaa0c9SPierre Ossman } 3846abaa0c9SPierre Ossman 3856abaa0c9SPierre Ossman /* 3866abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 3876abaa0c9SPierre Ossman */ 3886abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 3896abaa0c9SPierre Ossman { 3906abaa0c9SPierre Ossman BUG_ON(!host); 3916abaa0c9SPierre Ossman BUG_ON(!host->card); 3926abaa0c9SPierre Ossman 3936abaa0c9SPierre Ossman mmc_remove_card(host->card); 3946abaa0c9SPierre Ossman host->card = NULL; 3956abaa0c9SPierre Ossman } 3966abaa0c9SPierre Ossman 3976abaa0c9SPierre Ossman /* 3986abaa0c9SPierre Ossman * Card detection callback from host. 3996abaa0c9SPierre Ossman */ 4006abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 4016abaa0c9SPierre Ossman { 4026abaa0c9SPierre Ossman int err; 4036abaa0c9SPierre Ossman 4046abaa0c9SPierre Ossman BUG_ON(!host); 4056abaa0c9SPierre Ossman BUG_ON(!host->card); 4066abaa0c9SPierre Ossman 4076abaa0c9SPierre Ossman mmc_claim_host(host); 4086abaa0c9SPierre Ossman 4096abaa0c9SPierre Ossman /* 4106abaa0c9SPierre Ossman * Just check if our card has been removed. 4116abaa0c9SPierre Ossman */ 4126abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 4136abaa0c9SPierre Ossman 4147ea239d9SPierre Ossman mmc_release_host(host); 4157ea239d9SPierre Ossman 41617b0429dSPierre Ossman if (err) { 4174101c16aSPierre Ossman mmc_remove(host); 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 4254101c16aSPierre Ossman MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 4264101c16aSPierre Ossman card->raw_cid[2], card->raw_cid[3]); 4274101c16aSPierre Ossman MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 4284101c16aSPierre Ossman card->raw_csd[2], card->raw_csd[3]); 4294101c16aSPierre Ossman MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); 4304101c16aSPierre Ossman MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); 4314101c16aSPierre Ossman MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); 4324101c16aSPierre Ossman MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); 4334101c16aSPierre Ossman MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); 4344101c16aSPierre Ossman MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); 4354101c16aSPierre Ossman MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); 4364101c16aSPierre Ossman 4374101c16aSPierre Ossman static struct device_attribute mmc_dev_attrs[] = { 4384101c16aSPierre Ossman MMC_ATTR_RO(cid), 4394101c16aSPierre Ossman MMC_ATTR_RO(csd), 4404101c16aSPierre Ossman MMC_ATTR_RO(date), 4414101c16aSPierre Ossman MMC_ATTR_RO(fwrev), 4424101c16aSPierre Ossman MMC_ATTR_RO(hwrev), 4434101c16aSPierre Ossman MMC_ATTR_RO(manfid), 4444101c16aSPierre Ossman MMC_ATTR_RO(name), 4454101c16aSPierre Ossman MMC_ATTR_RO(oemid), 4464101c16aSPierre Ossman MMC_ATTR_RO(serial), 4474101c16aSPierre Ossman __ATTR_NULL, 4484101c16aSPierre Ossman }; 4494101c16aSPierre Ossman 4504101c16aSPierre Ossman /* 4514101c16aSPierre Ossman * Adds sysfs entries as relevant. 4524101c16aSPierre Ossman */ 4534101c16aSPierre Ossman static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) 4544101c16aSPierre Ossman { 4554101c16aSPierre Ossman int ret; 4564101c16aSPierre Ossman 4574101c16aSPierre Ossman ret = mmc_add_attrs(card, mmc_dev_attrs); 4584101c16aSPierre Ossman if (ret < 0) 4594101c16aSPierre Ossman return ret; 4604101c16aSPierre Ossman 4614101c16aSPierre Ossman return 0; 4624101c16aSPierre Ossman } 4634101c16aSPierre Ossman 4644101c16aSPierre Ossman /* 4654101c16aSPierre Ossman * Removes the sysfs entries added by mmc_sysfs_add(). 4664101c16aSPierre Ossman */ 4674101c16aSPierre Ossman static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) 4684101c16aSPierre Ossman { 4694101c16aSPierre Ossman mmc_remove_attrs(card, mmc_dev_attrs); 4704101c16aSPierre Ossman } 4714101c16aSPierre Ossman 4726abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 4736abaa0c9SPierre Ossman 4746abaa0c9SPierre Ossman /* 4756abaa0c9SPierre Ossman * Suspend callback from host. 4766abaa0c9SPierre Ossman */ 4776abaa0c9SPierre Ossman static void mmc_suspend(struct mmc_host *host) 4786abaa0c9SPierre Ossman { 4796abaa0c9SPierre Ossman BUG_ON(!host); 4806abaa0c9SPierre Ossman BUG_ON(!host->card); 4816abaa0c9SPierre Ossman 4826abaa0c9SPierre Ossman mmc_claim_host(host); 4836abaa0c9SPierre Ossman mmc_deselect_cards(host); 4846abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 4856abaa0c9SPierre Ossman mmc_release_host(host); 4866abaa0c9SPierre Ossman } 4876abaa0c9SPierre Ossman 4886abaa0c9SPierre Ossman /* 4896abaa0c9SPierre Ossman * Resume callback from host. 4906abaa0c9SPierre Ossman * 4916abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 4926abaa0c9SPierre Ossman * and, if so, restore all state to it. 4936abaa0c9SPierre Ossman */ 4946abaa0c9SPierre Ossman static void mmc_resume(struct mmc_host *host) 4956abaa0c9SPierre Ossman { 4966abaa0c9SPierre Ossman int err; 4976abaa0c9SPierre Ossman 4986abaa0c9SPierre Ossman BUG_ON(!host); 4996abaa0c9SPierre Ossman BUG_ON(!host->card); 5006abaa0c9SPierre Ossman 5016abaa0c9SPierre Ossman mmc_claim_host(host); 5028c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 5032986d0bfSPierre Ossman mmc_release_host(host); 5042986d0bfSPierre Ossman 50517b0429dSPierre Ossman if (err) { 5064101c16aSPierre Ossman mmc_remove(host); 5072986d0bfSPierre Ossman 5082986d0bfSPierre Ossman mmc_claim_host(host); 5096abaa0c9SPierre Ossman mmc_detach_bus(host); 5102986d0bfSPierre Ossman mmc_release_host(host); 5116abaa0c9SPierre Ossman } 5126abaa0c9SPierre Ossman 5136abaa0c9SPierre Ossman } 5146abaa0c9SPierre Ossman 5156abaa0c9SPierre Ossman #else 5166abaa0c9SPierre Ossman 5176abaa0c9SPierre Ossman #define mmc_suspend NULL 5186abaa0c9SPierre Ossman #define mmc_resume NULL 5196abaa0c9SPierre Ossman 5206abaa0c9SPierre Ossman #endif 5216abaa0c9SPierre Ossman 5226abaa0c9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 5236abaa0c9SPierre Ossman .remove = mmc_remove, 5246abaa0c9SPierre Ossman .detect = mmc_detect, 5254101c16aSPierre Ossman .sysfs_add = mmc_sysfs_add, 5264101c16aSPierre Ossman .sysfs_remove = mmc_sysfs_remove, 5276abaa0c9SPierre Ossman .suspend = mmc_suspend, 5286abaa0c9SPierre Ossman .resume = mmc_resume, 5296abaa0c9SPierre Ossman }; 5306abaa0c9SPierre Ossman 5316abaa0c9SPierre Ossman /* 5326abaa0c9SPierre Ossman * Starting point for MMC card init. 5336abaa0c9SPierre Ossman */ 5346abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 5356abaa0c9SPierre Ossman { 5366abaa0c9SPierre Ossman int err; 5376abaa0c9SPierre Ossman 5386abaa0c9SPierre Ossman BUG_ON(!host); 5396abaa0c9SPierre Ossman BUG_ON(!host->claimed); 5406abaa0c9SPierre Ossman 5416abaa0c9SPierre Ossman mmc_attach_bus(host, &mmc_ops); 5426abaa0c9SPierre Ossman 5436abaa0c9SPierre Ossman /* 5446abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 5456abaa0c9SPierre Ossman * support. 5466abaa0c9SPierre Ossman */ 5476abaa0c9SPierre Ossman if (ocr & 0x7F) { 5486abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 5496abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 5506abaa0c9SPierre Ossman mmc_hostname(host)); 5516abaa0c9SPierre Ossman ocr &= ~0x7F; 5526abaa0c9SPierre Ossman } 5536abaa0c9SPierre Ossman 5546abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 5556abaa0c9SPierre Ossman 5566abaa0c9SPierre Ossman /* 5576abaa0c9SPierre Ossman * Can we support the voltage of the card? 5586abaa0c9SPierre Ossman */ 559109b5bedSPierre Ossman if (!host->ocr) { 560109b5bedSPierre Ossman err = -EINVAL; 5616abaa0c9SPierre Ossman goto err; 562109b5bedSPierre Ossman } 5636abaa0c9SPierre Ossman 5646abaa0c9SPierre Ossman /* 5656abaa0c9SPierre Ossman * Detect and init the card. 5666abaa0c9SPierre Ossman */ 5678c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 56817b0429dSPierre Ossman if (err) 5696abaa0c9SPierre Ossman goto err; 5706abaa0c9SPierre Ossman 5716abaa0c9SPierre Ossman mmc_release_host(host); 5726abaa0c9SPierre Ossman 5734101c16aSPierre Ossman err = mmc_add_card(host->card); 5747ea239d9SPierre Ossman if (err) 5752986d0bfSPierre Ossman goto remove_card; 5767ea239d9SPierre Ossman 5777ea239d9SPierre Ossman return 0; 5787ea239d9SPierre Ossman 5792986d0bfSPierre Ossman remove_card: 5806abaa0c9SPierre Ossman mmc_remove_card(host->card); 5817ea239d9SPierre Ossman host->card = NULL; 5822986d0bfSPierre Ossman mmc_claim_host(host); 5837ea239d9SPierre Ossman err: 5847ea239d9SPierre Ossman mmc_detach_bus(host); 5857ea239d9SPierre Ossman mmc_release_host(host); 5867ea239d9SPierre Ossman 587109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 588109b5bedSPierre Ossman mmc_hostname(host), err); 589109b5bedSPierre Ossman 5907ea239d9SPierre Ossman return 0; 5917ea239d9SPierre Ossman } 5927ea239d9SPierre Ossman 593