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 */ 597ea239d9SPierre Ossman static void 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); 1047ea239d9SPierre Ossman mmc_card_set_bad(card); 1057ea239d9SPierre Ossman break; 1067ea239d9SPierre Ossman } 1077ea239d9SPierre Ossman } 1087ea239d9SPierre Ossman 1097ea239d9SPierre Ossman /* 1107ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 1117ea239d9SPierre Ossman */ 1127ea239d9SPierre Ossman static void mmc_decode_csd(struct mmc_card *card) 1137ea239d9SPierre Ossman { 1147ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 1157ea239d9SPierre Ossman unsigned int e, m, csd_struct; 1167ea239d9SPierre Ossman u32 *resp = card->raw_csd; 1177ea239d9SPierre Ossman 1187ea239d9SPierre Ossman /* 1197ea239d9SPierre Ossman * We only understand CSD structure v1.1 and v1.2. 1207ea239d9SPierre Ossman * v1.2 has extra information in bits 15, 11 and 10. 1217ea239d9SPierre Ossman */ 1227ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 1237ea239d9SPierre Ossman if (csd_struct != 1 && csd_struct != 2) { 1247ea239d9SPierre Ossman printk("%s: unrecognised CSD structure version %d\n", 1257ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 1267ea239d9SPierre Ossman mmc_card_set_bad(card); 1277ea239d9SPierre Ossman return; 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); 1527ea239d9SPierre Ossman } 1537ea239d9SPierre Ossman 1547ea239d9SPierre Ossman /* 15589a73cf5SPierre Ossman * Read and decode extended CSD. 1567ea239d9SPierre Ossman */ 15789a73cf5SPierre Ossman static int mmc_read_ext_csd(struct mmc_card *card) 1587ea239d9SPierre Ossman { 1597ea239d9SPierre Ossman int err; 1607ea239d9SPierre Ossman u8 *ext_csd; 1617ea239d9SPierre Ossman 1627ea239d9SPierre Ossman BUG_ON(!card); 1637ea239d9SPierre Ossman 1647ea239d9SPierre Ossman err = MMC_ERR_FAILED; 1657ea239d9SPierre Ossman 1667ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 1677ea239d9SPierre Ossman return MMC_ERR_NONE; 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 " 1767ea239d9SPierre Ossman "receive the ext_csd. mmc v4 cards will be " 1777ea239d9SPierre Ossman "treated as v3.\n", mmc_hostname(card->host)); 1787ea239d9SPierre Ossman return MMC_ERR_FAILED; 1797ea239d9SPierre Ossman } 1807ea239d9SPierre Ossman 1817ea239d9SPierre Ossman err = mmc_send_ext_csd(card, ext_csd); 1827ea239d9SPierre Ossman if (err != MMC_ERR_NONE) { 1837ea239d9SPierre Ossman /* 1847ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1857ea239d9SPierre Ossman * stored in their CSD. 1867ea239d9SPierre Ossman */ 1877ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1887ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1897ea239d9SPierre Ossman "on a possible high capacity card. " 1907ea239d9SPierre Ossman "Card will be ignored.\n", 1917ea239d9SPierre Ossman mmc_hostname(card->host)); 1927ea239d9SPierre Ossman } else { 1937ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 1947ea239d9SPierre Ossman "EXT_CSD, performance might " 1957ea239d9SPierre Ossman "suffer.\n", 1967ea239d9SPierre Ossman mmc_hostname(card->host)); 1977ea239d9SPierre Ossman err = MMC_ERR_NONE; 1987ea239d9SPierre Ossman } 1997ea239d9SPierre Ossman goto out; 2007ea239d9SPierre Ossman } 2017ea239d9SPierre Ossman 2027ea239d9SPierre Ossman card->ext_csd.sectors = 2037ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2047ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2057ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2067ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2077ea239d9SPierre Ossman if (card->ext_csd.sectors) 2087ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 2097ea239d9SPierre Ossman 2107ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2117ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2127ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2137ea239d9SPierre Ossman break; 2147ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2157ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2167ea239d9SPierre Ossman break; 2177ea239d9SPierre Ossman default: 2187ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2197ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2207ea239d9SPierre Ossman "support any high-speed modes.\n", 2217ea239d9SPierre Ossman mmc_hostname(card->host)); 2227ea239d9SPierre Ossman goto out; 2237ea239d9SPierre Ossman } 2247ea239d9SPierre Ossman 2257ea239d9SPierre Ossman out: 2267ea239d9SPierre Ossman kfree(ext_csd); 2277ea239d9SPierre Ossman 2287ea239d9SPierre Ossman return err; 2297ea239d9SPierre Ossman } 2307ea239d9SPierre Ossman 2317ea239d9SPierre Ossman /* 2327ea239d9SPierre Ossman * Host is being removed. Free up the current card. 2337ea239d9SPierre Ossman */ 2347ea239d9SPierre Ossman static void mmc_remove(struct mmc_host *host) 2357ea239d9SPierre Ossman { 2367ea239d9SPierre Ossman BUG_ON(!host); 2377ea239d9SPierre Ossman BUG_ON(!host->card); 2387ea239d9SPierre Ossman 2397ea239d9SPierre Ossman mmc_remove_card(host->card); 2407ea239d9SPierre Ossman host->card = NULL; 2417ea239d9SPierre Ossman } 2427ea239d9SPierre Ossman 2437ea239d9SPierre Ossman /* 2447ea239d9SPierre Ossman * Card detection callback from host. 2457ea239d9SPierre Ossman */ 2467ea239d9SPierre Ossman static void mmc_detect(struct mmc_host *host) 2477ea239d9SPierre Ossman { 2487ea239d9SPierre Ossman int err; 2497ea239d9SPierre Ossman 2507ea239d9SPierre Ossman BUG_ON(!host); 2517ea239d9SPierre Ossman BUG_ON(!host->card); 2527ea239d9SPierre Ossman 2537ea239d9SPierre Ossman mmc_claim_host(host); 2547ea239d9SPierre Ossman 2557ea239d9SPierre Ossman /* 2567ea239d9SPierre Ossman * Just check if our card has been removed. 2577ea239d9SPierre Ossman */ 2587ea239d9SPierre Ossman err = mmc_send_status(host->card, NULL); 2597ea239d9SPierre Ossman 2607ea239d9SPierre Ossman mmc_release_host(host); 2617ea239d9SPierre Ossman 2627ea239d9SPierre Ossman if (err != MMC_ERR_NONE) { 2637ea239d9SPierre Ossman mmc_remove_card(host->card); 2647ea239d9SPierre Ossman host->card = NULL; 2657ea239d9SPierre Ossman 2667ea239d9SPierre Ossman mmc_claim_host(host); 2677ea239d9SPierre Ossman mmc_detach_bus(host); 2687ea239d9SPierre Ossman mmc_release_host(host); 2697ea239d9SPierre Ossman } 2707ea239d9SPierre Ossman } 2717ea239d9SPierre Ossman 2727ea239d9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 2737ea239d9SPierre Ossman .remove = mmc_remove, 2747ea239d9SPierre Ossman .detect = mmc_detect, 2757ea239d9SPierre Ossman }; 2767ea239d9SPierre Ossman 2777ea239d9SPierre Ossman /* 2787ea239d9SPierre Ossman * Starting point for MMC card init. 2797ea239d9SPierre Ossman */ 2807ea239d9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 2817ea239d9SPierre Ossman { 2827ea239d9SPierre Ossman struct mmc_card *card; 2837ea239d9SPierre Ossman int err; 2847ea239d9SPierre Ossman u32 cid[4]; 2857ea239d9SPierre Ossman unsigned int max_dtr; 2867ea239d9SPierre Ossman 2877ea239d9SPierre Ossman BUG_ON(!host); 2887ea239d9SPierre Ossman BUG_ON(!host->claimed); 2897ea239d9SPierre Ossman 2907ea239d9SPierre Ossman mmc_attach_bus(host, &mmc_ops); 2917ea239d9SPierre Ossman 29255556da0SPhilip Langdale /* 29355556da0SPhilip Langdale * Sanity check the voltages that the card claims to 29455556da0SPhilip Langdale * support. 29555556da0SPhilip Langdale */ 29655556da0SPhilip Langdale if (ocr & 0x7F) { 29755556da0SPhilip Langdale printk(KERN_WARNING "%s: card claims to support voltages " 29855556da0SPhilip Langdale "below the defined range. These will be ignored.\n", 29955556da0SPhilip Langdale mmc_hostname(host)); 30055556da0SPhilip Langdale ocr &= ~0x7F; 30155556da0SPhilip Langdale } 30255556da0SPhilip Langdale 3037ea239d9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 3047ea239d9SPierre Ossman 3057ea239d9SPierre Ossman /* 3067ea239d9SPierre Ossman * Can we support the voltage of the card? 3077ea239d9SPierre Ossman */ 3087ea239d9SPierre Ossman if (!host->ocr) 3097ea239d9SPierre Ossman goto err; 3107ea239d9SPierre Ossman 3117ea239d9SPierre Ossman /* 3127ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 3137ea239d9SPierre Ossman * need to tell some cards to go back to the idle 3147ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 3157ea239d9SPierre Ossman * respond. 3167ea239d9SPierre Ossman */ 3177ea239d9SPierre Ossman mmc_go_idle(host); 3187ea239d9SPierre Ossman 3197ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 3207ea239d9SPierre Ossman mmc_send_op_cond(host, host->ocr | (1 << 30), NULL); 3217ea239d9SPierre Ossman 3227ea239d9SPierre Ossman /* 3237ea239d9SPierre Ossman * Fetch CID from card. 3247ea239d9SPierre Ossman */ 3257ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 3267ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3277ea239d9SPierre Ossman goto err; 3287ea239d9SPierre Ossman 3297ea239d9SPierre Ossman /* 3307ea239d9SPierre Ossman * Allocate card structure. 3317ea239d9SPierre Ossman */ 3327ea239d9SPierre Ossman card = mmc_alloc_card(host); 3337ea239d9SPierre Ossman if (IS_ERR(card)) 3347ea239d9SPierre Ossman goto err; 3357ea239d9SPierre Ossman 3367ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 3377ea239d9SPierre Ossman card->rca = 1; 3387ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3397ea239d9SPierre Ossman 3407ea239d9SPierre Ossman /* 3417ea239d9SPierre Ossman * Set card RCA. 3427ea239d9SPierre Ossman */ 3437ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 3447ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3457ea239d9SPierre Ossman goto free_card; 3467ea239d9SPierre Ossman 3477ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 3487ea239d9SPierre Ossman 3497ea239d9SPierre Ossman /* 3507ea239d9SPierre Ossman * Fetch CSD from card. 3517ea239d9SPierre Ossman */ 3527ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 3537ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3547ea239d9SPierre Ossman goto free_card; 3557ea239d9SPierre Ossman 3567ea239d9SPierre Ossman mmc_decode_csd(card); 3577ea239d9SPierre Ossman mmc_decode_cid(card); 3587ea239d9SPierre Ossman 3597ea239d9SPierre Ossman /* 36089a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3617ea239d9SPierre Ossman */ 3627ea239d9SPierre Ossman err = mmc_select_card(card); 3637ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3647ea239d9SPierre Ossman goto free_card; 3657ea239d9SPierre Ossman 36689a73cf5SPierre Ossman /* 36789a73cf5SPierre Ossman * Fetch and process extened CSD. 36889a73cf5SPierre Ossman */ 36989a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 3707ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 3717ea239d9SPierre Ossman goto free_card; 3727ea239d9SPierre Ossman 3737ea239d9SPierre Ossman /* 37489a73cf5SPierre Ossman * Activate high speed (if supported) 37589a73cf5SPierre Ossman */ 37689a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 37789a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 37889a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 37989a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 38089a73cf5SPierre Ossman if (err != MMC_ERR_NONE) 38189a73cf5SPierre Ossman goto free_card; 38289a73cf5SPierre Ossman 38389a73cf5SPierre Ossman mmc_card_set_highspeed(card); 38489a73cf5SPierre Ossman 38589a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 38689a73cf5SPierre Ossman } 38789a73cf5SPierre Ossman 38889a73cf5SPierre Ossman /* 3897ea239d9SPierre Ossman * Compute bus speed. 3907ea239d9SPierre Ossman */ 3917ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 3927ea239d9SPierre Ossman 3937ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 3947ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 3957ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 3967ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 3977ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 3987ea239d9SPierre Ossman } 3997ea239d9SPierre Ossman 4007ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 4017ea239d9SPierre Ossman 40289a73cf5SPierre Ossman /* 40389a73cf5SPierre Ossman * Activate wide bus (if supported). 40489a73cf5SPierre Ossman */ 40589a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 40689a73cf5SPierre Ossman (host->caps & MMC_CAP_4_BIT_DATA)) { 40789a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 40889a73cf5SPierre Ossman EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); 40989a73cf5SPierre Ossman if (err != MMC_ERR_NONE) 41089a73cf5SPierre Ossman goto free_card; 41189a73cf5SPierre Ossman 41289a73cf5SPierre Ossman mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 41389a73cf5SPierre Ossman } 41489a73cf5SPierre Ossman 4157ea239d9SPierre Ossman host->card = card; 4167ea239d9SPierre Ossman 4177ea239d9SPierre Ossman mmc_release_host(host); 4187ea239d9SPierre Ossman 4197ea239d9SPierre Ossman err = mmc_register_card(card); 4207ea239d9SPierre Ossman if (err) 4217ea239d9SPierre Ossman goto reclaim_host; 4227ea239d9SPierre Ossman 4237ea239d9SPierre Ossman return 0; 4247ea239d9SPierre Ossman 4257ea239d9SPierre Ossman reclaim_host: 4267ea239d9SPierre Ossman mmc_claim_host(host); 4277ea239d9SPierre Ossman free_card: 4287ea239d9SPierre Ossman mmc_remove_card(card); 4297ea239d9SPierre Ossman host->card = NULL; 4307ea239d9SPierre Ossman err: 4317ea239d9SPierre Ossman mmc_detach_bus(host); 4327ea239d9SPierre Ossman mmc_release_host(host); 4337ea239d9SPierre Ossman 4347ea239d9SPierre Ossman return 0; 4357ea239d9SPierre Ossman } 4367ea239d9SPierre Ossman 437