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 " 179adf66a0dSPierre Ossman "receive the ext_csd.\n", mmc_hostname(card->host)); 18017b0429dSPierre Ossman return -ENOMEM; 1817ea239d9SPierre Ossman } 1827ea239d9SPierre Ossman 1837ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 18417b0429dSPierre Ossman if (err) { 1857ea239d9SPierre Ossman /* 186adf66a0dSPierre Ossman * We all hosts that cannot perform the command 187adf66a0dSPierre Ossman * to fail more gracefully 188adf66a0dSPierre Ossman */ 189adf66a0dSPierre Ossman if (err != -EINVAL) 190adf66a0dSPierre Ossman goto out; 191adf66a0dSPierre Ossman 192adf66a0dSPierre Ossman /* 1937ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1947ea239d9SPierre Ossman * stored in their CSD. 1957ea239d9SPierre Ossman */ 1967ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1977ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1987ea239d9SPierre Ossman "on a possible high capacity card. " 1997ea239d9SPierre Ossman "Card will be ignored.\n", 2007ea239d9SPierre Ossman mmc_hostname(card->host)); 2017ea239d9SPierre Ossman } else { 2027ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2037ea239d9SPierre Ossman "EXT_CSD, performance might " 2047ea239d9SPierre Ossman "suffer.\n", 2057ea239d9SPierre Ossman mmc_hostname(card->host)); 20617b0429dSPierre Ossman err = 0; 2077ea239d9SPierre Ossman } 208adf66a0dSPierre Ossman 2097ea239d9SPierre Ossman goto out; 2107ea239d9SPierre Ossman } 2117ea239d9SPierre Ossman 2127ea239d9SPierre Ossman card->ext_csd.sectors = 2137ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2147ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2157ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2167ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2177ea239d9SPierre Ossman if (card->ext_csd.sectors) 2187ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 2197ea239d9SPierre Ossman 2207ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2217ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2227ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2237ea239d9SPierre Ossman break; 2247ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2257ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2267ea239d9SPierre Ossman break; 2277ea239d9SPierre Ossman default: 2287ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2297ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2307ea239d9SPierre Ossman "support any high-speed modes.\n", 2317ea239d9SPierre Ossman mmc_hostname(card->host)); 2327ea239d9SPierre Ossman goto out; 2337ea239d9SPierre Ossman } 2347ea239d9SPierre Ossman 2357ea239d9SPierre Ossman out: 2367ea239d9SPierre Ossman kfree(ext_csd); 2377ea239d9SPierre Ossman 2387ea239d9SPierre Ossman return err; 2397ea239d9SPierre Ossman } 2407ea239d9SPierre Ossman 2417ea239d9SPierre Ossman /* 2426abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2436abaa0c9SPierre Ossman * 2446abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2456abaa0c9SPierre Ossman * we're trying to reinitialise. 2467ea239d9SPierre Ossman */ 2478c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 2486abaa0c9SPierre Ossman struct mmc_card *oldcard) 2497ea239d9SPierre Ossman { 2507ea239d9SPierre Ossman struct mmc_card *card; 2517ea239d9SPierre Ossman int err; 2527ea239d9SPierre Ossman u32 cid[4]; 2537ea239d9SPierre Ossman unsigned int max_dtr; 2547ea239d9SPierre Ossman 2557ea239d9SPierre Ossman BUG_ON(!host); 2567ea239d9SPierre Ossman BUG_ON(!host->claimed); 2577ea239d9SPierre Ossman 2587ea239d9SPierre Ossman /* 2597ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 2607ea239d9SPierre Ossman * need to tell some cards to go back to the idle 2617ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 2627ea239d9SPierre Ossman * respond. 2637ea239d9SPierre Ossman */ 2647ea239d9SPierre Ossman mmc_go_idle(host); 2657ea239d9SPierre Ossman 2667ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 2676abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 26817b0429dSPierre Ossman if (err) 2696abaa0c9SPierre Ossman goto err; 2707ea239d9SPierre Ossman 2717ea239d9SPierre Ossman /* 2727ea239d9SPierre Ossman * Fetch CID from card. 2737ea239d9SPierre Ossman */ 2747ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 27517b0429dSPierre Ossman if (err) 2767ea239d9SPierre Ossman goto err; 2777ea239d9SPierre Ossman 2786abaa0c9SPierre Ossman if (oldcard) { 279adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 280adf66a0dSPierre Ossman err = -ENOENT; 2816abaa0c9SPierre Ossman goto err; 282adf66a0dSPierre Ossman } 2836abaa0c9SPierre Ossman 2846abaa0c9SPierre Ossman card = oldcard; 2856abaa0c9SPierre Ossman } else { 2867ea239d9SPierre Ossman /* 2877ea239d9SPierre Ossman * Allocate card structure. 2887ea239d9SPierre Ossman */ 2897ea239d9SPierre Ossman card = mmc_alloc_card(host); 290adf66a0dSPierre Ossman if (IS_ERR(card)) { 291adf66a0dSPierre Ossman err = PTR_ERR(card); 2927ea239d9SPierre Ossman goto err; 293adf66a0dSPierre Ossman } 2947ea239d9SPierre Ossman 2957ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 2967ea239d9SPierre Ossman card->rca = 1; 2977ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 2986abaa0c9SPierre Ossman } 2997ea239d9SPierre Ossman 3007ea239d9SPierre Ossman /* 3017ea239d9SPierre Ossman * Set card RCA. 3027ea239d9SPierre Ossman */ 3037ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 30417b0429dSPierre Ossman if (err) 3057ea239d9SPierre Ossman goto free_card; 3067ea239d9SPierre Ossman 3077ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 3087ea239d9SPierre Ossman 3096abaa0c9SPierre Ossman if (!oldcard) { 3107ea239d9SPierre Ossman /* 3117ea239d9SPierre Ossman * Fetch CSD from card. 3127ea239d9SPierre Ossman */ 3137ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 31417b0429dSPierre Ossman if (err) 3157ea239d9SPierre Ossman goto free_card; 3167ea239d9SPierre Ossman 317bd766312SPierre Ossman err = mmc_decode_csd(card); 318adf66a0dSPierre Ossman if (err) 319bd766312SPierre Ossman goto free_card; 320bd766312SPierre Ossman err = mmc_decode_cid(card); 321adf66a0dSPierre Ossman if (err) 322bd766312SPierre Ossman goto free_card; 3236abaa0c9SPierre Ossman } 3247ea239d9SPierre Ossman 3257ea239d9SPierre Ossman /* 32689a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3277ea239d9SPierre Ossman */ 3287ea239d9SPierre Ossman err = mmc_select_card(card); 32917b0429dSPierre Ossman if (err) 3307ea239d9SPierre Ossman goto free_card; 3317ea239d9SPierre Ossman 3326abaa0c9SPierre Ossman if (!oldcard) { 33389a73cf5SPierre Ossman /* 33489a73cf5SPierre Ossman * Fetch and process extened CSD. 33589a73cf5SPierre Ossman */ 33689a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 33717b0429dSPierre Ossman if (err) 3387ea239d9SPierre Ossman goto free_card; 3396abaa0c9SPierre Ossman } 3407ea239d9SPierre Ossman 3417ea239d9SPierre Ossman /* 34289a73cf5SPierre Ossman * Activate high speed (if supported) 34389a73cf5SPierre Ossman */ 34489a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 34589a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 34689a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 34789a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 34817b0429dSPierre Ossman if (err) 34989a73cf5SPierre Ossman goto free_card; 35089a73cf5SPierre Ossman 35189a73cf5SPierre Ossman mmc_card_set_highspeed(card); 35289a73cf5SPierre Ossman 35389a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 35489a73cf5SPierre Ossman } 35589a73cf5SPierre Ossman 35689a73cf5SPierre Ossman /* 3577ea239d9SPierre Ossman * Compute bus speed. 3587ea239d9SPierre Ossman */ 3597ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 3607ea239d9SPierre Ossman 3617ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 3627ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 3637ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 3647ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 3657ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 3667ea239d9SPierre Ossman } 3677ea239d9SPierre Ossman 3687ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 3697ea239d9SPierre Ossman 37089a73cf5SPierre Ossman /* 37189a73cf5SPierre Ossman * Activate wide bus (if supported). 37289a73cf5SPierre Ossman */ 37389a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 37489a73cf5SPierre Ossman (host->caps & MMC_CAP_4_BIT_DATA)) { 37589a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 37689a73cf5SPierre Ossman EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); 37717b0429dSPierre Ossman if (err) 37889a73cf5SPierre Ossman goto free_card; 37989a73cf5SPierre Ossman 38089a73cf5SPierre Ossman mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 38189a73cf5SPierre Ossman } 38289a73cf5SPierre Ossman 3836abaa0c9SPierre Ossman if (!oldcard) 3847ea239d9SPierre Ossman host->card = card; 3857ea239d9SPierre Ossman 38617b0429dSPierre Ossman return 0; 3876abaa0c9SPierre Ossman 3886abaa0c9SPierre Ossman free_card: 3896abaa0c9SPierre Ossman if (!oldcard) 3906abaa0c9SPierre Ossman mmc_remove_card(card); 3916abaa0c9SPierre Ossman err: 3926abaa0c9SPierre Ossman 393adf66a0dSPierre Ossman return err; 3946abaa0c9SPierre Ossman } 3956abaa0c9SPierre Ossman 3966abaa0c9SPierre Ossman /* 3976abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 3986abaa0c9SPierre Ossman */ 3996abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 4006abaa0c9SPierre Ossman { 4016abaa0c9SPierre Ossman BUG_ON(!host); 4026abaa0c9SPierre Ossman BUG_ON(!host->card); 4036abaa0c9SPierre Ossman 4046abaa0c9SPierre Ossman mmc_remove_card(host->card); 4056abaa0c9SPierre Ossman host->card = NULL; 4066abaa0c9SPierre Ossman } 4076abaa0c9SPierre Ossman 4086abaa0c9SPierre Ossman /* 4096abaa0c9SPierre Ossman * Card detection callback from host. 4106abaa0c9SPierre Ossman */ 4116abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 4126abaa0c9SPierre Ossman { 4136abaa0c9SPierre Ossman int err; 4146abaa0c9SPierre Ossman 4156abaa0c9SPierre Ossman BUG_ON(!host); 4166abaa0c9SPierre Ossman BUG_ON(!host->card); 4176abaa0c9SPierre Ossman 4186abaa0c9SPierre Ossman mmc_claim_host(host); 4196abaa0c9SPierre Ossman 4206abaa0c9SPierre Ossman /* 4216abaa0c9SPierre Ossman * Just check if our card has been removed. 4226abaa0c9SPierre Ossman */ 4236abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 4246abaa0c9SPierre Ossman 4257ea239d9SPierre Ossman mmc_release_host(host); 4267ea239d9SPierre Ossman 42717b0429dSPierre Ossman if (err) { 4284101c16aSPierre Ossman mmc_remove(host); 4296abaa0c9SPierre Ossman 4306abaa0c9SPierre Ossman mmc_claim_host(host); 4316abaa0c9SPierre Ossman mmc_detach_bus(host); 4326abaa0c9SPierre Ossman mmc_release_host(host); 4336abaa0c9SPierre Ossman } 4346abaa0c9SPierre Ossman } 4356abaa0c9SPierre Ossman 4364101c16aSPierre Ossman MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 4374101c16aSPierre Ossman card->raw_cid[2], card->raw_cid[3]); 4384101c16aSPierre Ossman MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 4394101c16aSPierre Ossman card->raw_csd[2], card->raw_csd[3]); 4404101c16aSPierre Ossman MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); 4414101c16aSPierre Ossman MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); 4424101c16aSPierre Ossman MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); 4434101c16aSPierre Ossman MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); 4444101c16aSPierre Ossman MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); 4454101c16aSPierre Ossman MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); 4464101c16aSPierre Ossman MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); 4474101c16aSPierre Ossman 4484101c16aSPierre Ossman static struct device_attribute mmc_dev_attrs[] = { 4494101c16aSPierre Ossman MMC_ATTR_RO(cid), 4504101c16aSPierre Ossman MMC_ATTR_RO(csd), 4514101c16aSPierre Ossman MMC_ATTR_RO(date), 4524101c16aSPierre Ossman MMC_ATTR_RO(fwrev), 4534101c16aSPierre Ossman MMC_ATTR_RO(hwrev), 4544101c16aSPierre Ossman MMC_ATTR_RO(manfid), 4554101c16aSPierre Ossman MMC_ATTR_RO(name), 4564101c16aSPierre Ossman MMC_ATTR_RO(oemid), 4574101c16aSPierre Ossman MMC_ATTR_RO(serial), 4584101c16aSPierre Ossman __ATTR_NULL, 4594101c16aSPierre Ossman }; 4604101c16aSPierre Ossman 4614101c16aSPierre Ossman /* 4624101c16aSPierre Ossman * Adds sysfs entries as relevant. 4634101c16aSPierre Ossman */ 4644101c16aSPierre Ossman static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) 4654101c16aSPierre Ossman { 4664101c16aSPierre Ossman int ret; 4674101c16aSPierre Ossman 4684101c16aSPierre Ossman ret = mmc_add_attrs(card, mmc_dev_attrs); 4694101c16aSPierre Ossman if (ret < 0) 4704101c16aSPierre Ossman return ret; 4714101c16aSPierre Ossman 4724101c16aSPierre Ossman return 0; 4734101c16aSPierre Ossman } 4744101c16aSPierre Ossman 4754101c16aSPierre Ossman /* 4764101c16aSPierre Ossman * Removes the sysfs entries added by mmc_sysfs_add(). 4774101c16aSPierre Ossman */ 4784101c16aSPierre Ossman static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) 4794101c16aSPierre Ossman { 4804101c16aSPierre Ossman mmc_remove_attrs(card, mmc_dev_attrs); 4814101c16aSPierre Ossman } 4824101c16aSPierre Ossman 4836abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 4846abaa0c9SPierre Ossman 4856abaa0c9SPierre Ossman /* 4866abaa0c9SPierre Ossman * Suspend callback from host. 4876abaa0c9SPierre Ossman */ 4886abaa0c9SPierre Ossman static void mmc_suspend(struct mmc_host *host) 4896abaa0c9SPierre Ossman { 4906abaa0c9SPierre Ossman BUG_ON(!host); 4916abaa0c9SPierre Ossman BUG_ON(!host->card); 4926abaa0c9SPierre Ossman 4936abaa0c9SPierre Ossman mmc_claim_host(host); 4946abaa0c9SPierre Ossman mmc_deselect_cards(host); 4956abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 4966abaa0c9SPierre Ossman mmc_release_host(host); 4976abaa0c9SPierre Ossman } 4986abaa0c9SPierre Ossman 4996abaa0c9SPierre Ossman /* 5006abaa0c9SPierre Ossman * Resume callback from host. 5016abaa0c9SPierre Ossman * 5026abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5036abaa0c9SPierre Ossman * and, if so, restore all state to it. 5046abaa0c9SPierre Ossman */ 5056abaa0c9SPierre Ossman static void mmc_resume(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); 5138c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 5142986d0bfSPierre Ossman mmc_release_host(host); 5152986d0bfSPierre Ossman 51617b0429dSPierre Ossman if (err) { 5174101c16aSPierre Ossman mmc_remove(host); 5182986d0bfSPierre Ossman 5192986d0bfSPierre Ossman mmc_claim_host(host); 5206abaa0c9SPierre Ossman mmc_detach_bus(host); 5212986d0bfSPierre Ossman mmc_release_host(host); 5226abaa0c9SPierre Ossman } 5236abaa0c9SPierre Ossman 5246abaa0c9SPierre Ossman } 5256abaa0c9SPierre Ossman 5266abaa0c9SPierre Ossman #else 5276abaa0c9SPierre Ossman 5286abaa0c9SPierre Ossman #define mmc_suspend NULL 5296abaa0c9SPierre Ossman #define mmc_resume NULL 5306abaa0c9SPierre Ossman 5316abaa0c9SPierre Ossman #endif 5326abaa0c9SPierre Ossman 5336abaa0c9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 5346abaa0c9SPierre Ossman .remove = mmc_remove, 5356abaa0c9SPierre Ossman .detect = mmc_detect, 5364101c16aSPierre Ossman .sysfs_add = mmc_sysfs_add, 5374101c16aSPierre Ossman .sysfs_remove = mmc_sysfs_remove, 5386abaa0c9SPierre Ossman .suspend = mmc_suspend, 5396abaa0c9SPierre Ossman .resume = mmc_resume, 5406abaa0c9SPierre Ossman }; 5416abaa0c9SPierre Ossman 5426abaa0c9SPierre Ossman /* 5436abaa0c9SPierre Ossman * Starting point for MMC card init. 5446abaa0c9SPierre Ossman */ 5456abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 5466abaa0c9SPierre Ossman { 5476abaa0c9SPierre Ossman int err; 5486abaa0c9SPierre Ossman 5496abaa0c9SPierre Ossman BUG_ON(!host); 5506abaa0c9SPierre Ossman BUG_ON(!host->claimed); 5516abaa0c9SPierre Ossman 5526abaa0c9SPierre Ossman mmc_attach_bus(host, &mmc_ops); 5536abaa0c9SPierre Ossman 5546abaa0c9SPierre Ossman /* 5556abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 5566abaa0c9SPierre Ossman * support. 5576abaa0c9SPierre Ossman */ 5586abaa0c9SPierre Ossman if (ocr & 0x7F) { 5596abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 5606abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 5616abaa0c9SPierre Ossman mmc_hostname(host)); 5626abaa0c9SPierre Ossman ocr &= ~0x7F; 5636abaa0c9SPierre Ossman } 5646abaa0c9SPierre Ossman 5656abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 5666abaa0c9SPierre Ossman 5676abaa0c9SPierre Ossman /* 5686abaa0c9SPierre Ossman * Can we support the voltage of the card? 5696abaa0c9SPierre Ossman */ 570109b5bedSPierre Ossman if (!host->ocr) { 571109b5bedSPierre Ossman err = -EINVAL; 5726abaa0c9SPierre Ossman goto err; 573109b5bedSPierre Ossman } 5746abaa0c9SPierre Ossman 5756abaa0c9SPierre Ossman /* 5766abaa0c9SPierre Ossman * Detect and init the card. 5776abaa0c9SPierre Ossman */ 5788c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 57917b0429dSPierre Ossman if (err) 5806abaa0c9SPierre Ossman goto err; 5816abaa0c9SPierre Ossman 5826abaa0c9SPierre Ossman mmc_release_host(host); 5836abaa0c9SPierre Ossman 5844101c16aSPierre Ossman err = mmc_add_card(host->card); 5857ea239d9SPierre Ossman if (err) 5862986d0bfSPierre Ossman goto remove_card; 5877ea239d9SPierre Ossman 5887ea239d9SPierre Ossman return 0; 5897ea239d9SPierre Ossman 5902986d0bfSPierre Ossman remove_card: 5916abaa0c9SPierre Ossman mmc_remove_card(host->card); 5927ea239d9SPierre Ossman host->card = NULL; 5932986d0bfSPierre Ossman mmc_claim_host(host); 5947ea239d9SPierre Ossman err: 5957ea239d9SPierre Ossman mmc_detach_bus(host); 5967ea239d9SPierre Ossman mmc_release_host(host); 5977ea239d9SPierre Ossman 598109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 599109b5bedSPierre Ossman mmc_hostname(host), err); 600109b5bedSPierre Ossman 601adf66a0dSPierre Ossman return err; 6027ea239d9SPierre Ossman } 6037ea239d9SPierre Ossman 604