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; 164d7604d76SPierre Ossman unsigned int ext_csd_struct; 1657ea239d9SPierre Ossman 1667ea239d9SPierre Ossman BUG_ON(!card); 1677ea239d9SPierre Ossman 16817b0429dSPierre Ossman err = -EIO; 1697ea239d9SPierre Ossman 1707ea239d9SPierre Ossman if (card->csd.mmca_vsn < CSD_SPEC_VER_4) 17117b0429dSPierre Ossman return 0; 1727ea239d9SPierre Ossman 1737ea239d9SPierre Ossman /* 1747ea239d9SPierre Ossman * As the ext_csd is so large and mostly unused, we don't store the 1757ea239d9SPierre Ossman * raw block in mmc_card. 1767ea239d9SPierre Ossman */ 1777ea239d9SPierre Ossman ext_csd = kmalloc(512, GFP_KERNEL); 1787ea239d9SPierre Ossman if (!ext_csd) { 1797ea239d9SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer to " 180adf66a0dSPierre Ossman "receive the ext_csd.\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 /* 187adf66a0dSPierre Ossman * We all hosts that cannot perform the command 188adf66a0dSPierre Ossman * to fail more gracefully 189adf66a0dSPierre Ossman */ 190adf66a0dSPierre Ossman if (err != -EINVAL) 191adf66a0dSPierre Ossman goto out; 192adf66a0dSPierre Ossman 193adf66a0dSPierre Ossman /* 1947ea239d9SPierre Ossman * High capacity cards should have this "magic" size 1957ea239d9SPierre Ossman * stored in their CSD. 1967ea239d9SPierre Ossman */ 1977ea239d9SPierre Ossman if (card->csd.capacity == (4096 * 512)) { 1987ea239d9SPierre Ossman printk(KERN_ERR "%s: unable to read EXT_CSD " 1997ea239d9SPierre Ossman "on a possible high capacity card. " 2007ea239d9SPierre Ossman "Card will be ignored.\n", 2017ea239d9SPierre Ossman mmc_hostname(card->host)); 2027ea239d9SPierre Ossman } else { 2037ea239d9SPierre Ossman printk(KERN_WARNING "%s: unable to read " 2047ea239d9SPierre Ossman "EXT_CSD, performance might " 2057ea239d9SPierre Ossman "suffer.\n", 2067ea239d9SPierre Ossman mmc_hostname(card->host)); 20717b0429dSPierre Ossman err = 0; 2087ea239d9SPierre Ossman } 209adf66a0dSPierre Ossman 2107ea239d9SPierre Ossman goto out; 2117ea239d9SPierre Ossman } 2127ea239d9SPierre Ossman 213d7604d76SPierre Ossman ext_csd_struct = ext_csd[EXT_CSD_REV]; 214d7604d76SPierre Ossman if (ext_csd_struct > 2) { 2158fdd8521SPierre Ossman printk(KERN_ERR "%s: unrecognised EXT_CSD structure " 2168fdd8521SPierre Ossman "version %d\n", mmc_hostname(card->host), 2178fdd8521SPierre Ossman ext_csd_struct); 218d7604d76SPierre Ossman return -EINVAL; 219d7604d76SPierre Ossman } 220d7604d76SPierre Ossman 221d7604d76SPierre Ossman if (ext_csd_struct >= 2) { 2227ea239d9SPierre Ossman card->ext_csd.sectors = 2237ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | 2247ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | 2257ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | 2267ea239d9SPierre Ossman ext_csd[EXT_CSD_SEC_CNT + 3] << 24; 2277ea239d9SPierre Ossman if (card->ext_csd.sectors) 2287ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 229d7604d76SPierre Ossman } 2307ea239d9SPierre Ossman 2317ea239d9SPierre Ossman switch (ext_csd[EXT_CSD_CARD_TYPE]) { 2327ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: 2337ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 52000000; 2347ea239d9SPierre Ossman break; 2357ea239d9SPierre Ossman case EXT_CSD_CARD_TYPE_26: 2367ea239d9SPierre Ossman card->ext_csd.hs_max_dtr = 26000000; 2377ea239d9SPierre Ossman break; 2387ea239d9SPierre Ossman default: 2397ea239d9SPierre Ossman /* MMC v4 spec says this cannot happen */ 2407ea239d9SPierre Ossman printk(KERN_WARNING "%s: card is mmc v4 but doesn't " 2417ea239d9SPierre Ossman "support any high-speed modes.\n", 2427ea239d9SPierre Ossman mmc_hostname(card->host)); 2437ea239d9SPierre Ossman goto out; 2447ea239d9SPierre Ossman } 2457ea239d9SPierre Ossman 2467ea239d9SPierre Ossman out: 2477ea239d9SPierre Ossman kfree(ext_csd); 2487ea239d9SPierre Ossman 2497ea239d9SPierre Ossman return err; 2507ea239d9SPierre Ossman } 2517ea239d9SPierre Ossman 2527ea239d9SPierre Ossman /* 2536abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2546abaa0c9SPierre Ossman * 2556abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2566abaa0c9SPierre Ossman * we're trying to reinitialise. 2577ea239d9SPierre Ossman */ 2588c75deaeSPierre Ossman static int mmc_init_card(struct mmc_host *host, u32 ocr, 2596abaa0c9SPierre Ossman struct mmc_card *oldcard) 2607ea239d9SPierre Ossman { 2617ea239d9SPierre Ossman struct mmc_card *card; 2627ea239d9SPierre Ossman int err; 2637ea239d9SPierre Ossman u32 cid[4]; 2647ea239d9SPierre Ossman unsigned int max_dtr; 2657ea239d9SPierre Ossman 2667ea239d9SPierre Ossman BUG_ON(!host); 2677ea239d9SPierre Ossman BUG_ON(!host->claimed); 2687ea239d9SPierre Ossman 2697ea239d9SPierre Ossman /* 2707ea239d9SPierre Ossman * Since we're changing the OCR value, we seem to 2717ea239d9SPierre Ossman * need to tell some cards to go back to the idle 2727ea239d9SPierre Ossman * state. We wait 1ms to give cards time to 2737ea239d9SPierre Ossman * respond. 2747ea239d9SPierre Ossman */ 2757ea239d9SPierre Ossman mmc_go_idle(host); 2767ea239d9SPierre Ossman 2777ea239d9SPierre Ossman /* The extra bit indicates that we support high capacity */ 2786abaa0c9SPierre Ossman err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); 27917b0429dSPierre Ossman if (err) 2806abaa0c9SPierre Ossman goto err; 2817ea239d9SPierre Ossman 2827ea239d9SPierre Ossman /* 2837ea239d9SPierre Ossman * Fetch CID from card. 2847ea239d9SPierre Ossman */ 2857ea239d9SPierre Ossman err = mmc_all_send_cid(host, cid); 28617b0429dSPierre Ossman if (err) 2877ea239d9SPierre Ossman goto err; 2887ea239d9SPierre Ossman 2896abaa0c9SPierre Ossman if (oldcard) { 290adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 291adf66a0dSPierre Ossman err = -ENOENT; 2926abaa0c9SPierre Ossman goto err; 293adf66a0dSPierre Ossman } 2946abaa0c9SPierre Ossman 2956abaa0c9SPierre Ossman card = oldcard; 2966abaa0c9SPierre Ossman } else { 2977ea239d9SPierre Ossman /* 2987ea239d9SPierre Ossman * Allocate card structure. 2997ea239d9SPierre Ossman */ 3007ea239d9SPierre Ossman card = mmc_alloc_card(host); 301adf66a0dSPierre Ossman if (IS_ERR(card)) { 302adf66a0dSPierre Ossman err = PTR_ERR(card); 3037ea239d9SPierre Ossman goto err; 304adf66a0dSPierre Ossman } 3057ea239d9SPierre Ossman 3067ea239d9SPierre Ossman card->type = MMC_TYPE_MMC; 3077ea239d9SPierre Ossman card->rca = 1; 3087ea239d9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3096abaa0c9SPierre Ossman } 3107ea239d9SPierre Ossman 3117ea239d9SPierre Ossman /* 3127ea239d9SPierre Ossman * Set card RCA. 3137ea239d9SPierre Ossman */ 3147ea239d9SPierre Ossman err = mmc_set_relative_addr(card); 31517b0429dSPierre Ossman if (err) 3167ea239d9SPierre Ossman goto free_card; 3177ea239d9SPierre Ossman 3187ea239d9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 3197ea239d9SPierre Ossman 3206abaa0c9SPierre Ossman if (!oldcard) { 3217ea239d9SPierre Ossman /* 3227ea239d9SPierre Ossman * Fetch CSD from card. 3237ea239d9SPierre Ossman */ 3247ea239d9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 32517b0429dSPierre Ossman if (err) 3267ea239d9SPierre Ossman goto free_card; 3277ea239d9SPierre Ossman 328bd766312SPierre Ossman err = mmc_decode_csd(card); 329adf66a0dSPierre Ossman if (err) 330bd766312SPierre Ossman goto free_card; 331bd766312SPierre Ossman err = mmc_decode_cid(card); 332adf66a0dSPierre Ossman if (err) 333bd766312SPierre Ossman goto free_card; 3346abaa0c9SPierre Ossman } 3357ea239d9SPierre Ossman 3367ea239d9SPierre Ossman /* 33789a73cf5SPierre Ossman * Select card, as all following commands rely on that. 3387ea239d9SPierre Ossman */ 3397ea239d9SPierre Ossman err = mmc_select_card(card); 34017b0429dSPierre Ossman if (err) 3417ea239d9SPierre Ossman goto free_card; 3427ea239d9SPierre Ossman 3436abaa0c9SPierre Ossman if (!oldcard) { 34489a73cf5SPierre Ossman /* 34589a73cf5SPierre Ossman * Fetch and process extened CSD. 34689a73cf5SPierre Ossman */ 34789a73cf5SPierre Ossman err = mmc_read_ext_csd(card); 34817b0429dSPierre Ossman if (err) 3497ea239d9SPierre Ossman goto free_card; 3506abaa0c9SPierre Ossman } 3517ea239d9SPierre Ossman 3527ea239d9SPierre Ossman /* 35389a73cf5SPierre Ossman * Activate high speed (if supported) 35489a73cf5SPierre Ossman */ 35589a73cf5SPierre Ossman if ((card->ext_csd.hs_max_dtr != 0) && 35689a73cf5SPierre Ossman (host->caps & MMC_CAP_MMC_HIGHSPEED)) { 35789a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 35889a73cf5SPierre Ossman EXT_CSD_HS_TIMING, 1); 35917b0429dSPierre Ossman if (err) 36089a73cf5SPierre Ossman goto free_card; 36189a73cf5SPierre Ossman 36289a73cf5SPierre Ossman mmc_card_set_highspeed(card); 36389a73cf5SPierre Ossman 36489a73cf5SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_MMC_HS); 36589a73cf5SPierre Ossman } 36689a73cf5SPierre Ossman 36789a73cf5SPierre Ossman /* 3687ea239d9SPierre Ossman * Compute bus speed. 3697ea239d9SPierre Ossman */ 3707ea239d9SPierre Ossman max_dtr = (unsigned int)-1; 3717ea239d9SPierre Ossman 3727ea239d9SPierre Ossman if (mmc_card_highspeed(card)) { 3737ea239d9SPierre Ossman if (max_dtr > card->ext_csd.hs_max_dtr) 3747ea239d9SPierre Ossman max_dtr = card->ext_csd.hs_max_dtr; 3757ea239d9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 3767ea239d9SPierre Ossman max_dtr = card->csd.max_dtr; 3777ea239d9SPierre Ossman } 3787ea239d9SPierre Ossman 3797ea239d9SPierre Ossman mmc_set_clock(host, max_dtr); 3807ea239d9SPierre Ossman 38189a73cf5SPierre Ossman /* 38289a73cf5SPierre Ossman * Activate wide bus (if supported). 38389a73cf5SPierre Ossman */ 38489a73cf5SPierre Ossman if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && 38589a73cf5SPierre Ossman (host->caps & MMC_CAP_4_BIT_DATA)) { 38689a73cf5SPierre Ossman err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, 38789a73cf5SPierre Ossman EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); 38817b0429dSPierre Ossman if (err) 38989a73cf5SPierre Ossman goto free_card; 39089a73cf5SPierre Ossman 39189a73cf5SPierre Ossman mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 39289a73cf5SPierre Ossman } 39389a73cf5SPierre Ossman 3946abaa0c9SPierre Ossman if (!oldcard) 3957ea239d9SPierre Ossman host->card = card; 3967ea239d9SPierre Ossman 39717b0429dSPierre Ossman return 0; 3986abaa0c9SPierre Ossman 3996abaa0c9SPierre Ossman free_card: 4006abaa0c9SPierre Ossman if (!oldcard) 4016abaa0c9SPierre Ossman mmc_remove_card(card); 4026abaa0c9SPierre Ossman err: 4036abaa0c9SPierre Ossman 404adf66a0dSPierre Ossman return err; 4056abaa0c9SPierre Ossman } 4066abaa0c9SPierre Ossman 4076abaa0c9SPierre Ossman /* 4086abaa0c9SPierre Ossman * Host is being removed. Free up the current card. 4096abaa0c9SPierre Ossman */ 4106abaa0c9SPierre Ossman static void mmc_remove(struct mmc_host *host) 4116abaa0c9SPierre Ossman { 4126abaa0c9SPierre Ossman BUG_ON(!host); 4136abaa0c9SPierre Ossman BUG_ON(!host->card); 4146abaa0c9SPierre Ossman 4156abaa0c9SPierre Ossman mmc_remove_card(host->card); 4166abaa0c9SPierre Ossman host->card = NULL; 4176abaa0c9SPierre Ossman } 4186abaa0c9SPierre Ossman 4196abaa0c9SPierre Ossman /* 4206abaa0c9SPierre Ossman * Card detection callback from host. 4216abaa0c9SPierre Ossman */ 4226abaa0c9SPierre Ossman static void mmc_detect(struct mmc_host *host) 4236abaa0c9SPierre Ossman { 4246abaa0c9SPierre Ossman int err; 4256abaa0c9SPierre Ossman 4266abaa0c9SPierre Ossman BUG_ON(!host); 4276abaa0c9SPierre Ossman BUG_ON(!host->card); 4286abaa0c9SPierre Ossman 4296abaa0c9SPierre Ossman mmc_claim_host(host); 4306abaa0c9SPierre Ossman 4316abaa0c9SPierre Ossman /* 4326abaa0c9SPierre Ossman * Just check if our card has been removed. 4336abaa0c9SPierre Ossman */ 4346abaa0c9SPierre Ossman err = mmc_send_status(host->card, NULL); 4356abaa0c9SPierre Ossman 4367ea239d9SPierre Ossman mmc_release_host(host); 4377ea239d9SPierre Ossman 43817b0429dSPierre Ossman if (err) { 4394101c16aSPierre Ossman mmc_remove(host); 4406abaa0c9SPierre Ossman 4416abaa0c9SPierre Ossman mmc_claim_host(host); 4426abaa0c9SPierre Ossman mmc_detach_bus(host); 4436abaa0c9SPierre Ossman mmc_release_host(host); 4446abaa0c9SPierre Ossman } 4456abaa0c9SPierre Ossman } 4466abaa0c9SPierre Ossman 4474101c16aSPierre Ossman MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 4484101c16aSPierre Ossman card->raw_cid[2], card->raw_cid[3]); 4494101c16aSPierre Ossman MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 4504101c16aSPierre Ossman card->raw_csd[2], card->raw_csd[3]); 4514101c16aSPierre Ossman MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); 4524101c16aSPierre Ossman MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); 4534101c16aSPierre Ossman MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); 4544101c16aSPierre Ossman MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); 4554101c16aSPierre Ossman MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); 4564101c16aSPierre Ossman MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); 4574101c16aSPierre Ossman MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); 4584101c16aSPierre Ossman 4594101c16aSPierre Ossman static struct device_attribute mmc_dev_attrs[] = { 4604101c16aSPierre Ossman MMC_ATTR_RO(cid), 4614101c16aSPierre Ossman MMC_ATTR_RO(csd), 4624101c16aSPierre Ossman MMC_ATTR_RO(date), 4634101c16aSPierre Ossman MMC_ATTR_RO(fwrev), 4644101c16aSPierre Ossman MMC_ATTR_RO(hwrev), 4654101c16aSPierre Ossman MMC_ATTR_RO(manfid), 4664101c16aSPierre Ossman MMC_ATTR_RO(name), 4674101c16aSPierre Ossman MMC_ATTR_RO(oemid), 4684101c16aSPierre Ossman MMC_ATTR_RO(serial), 4694101c16aSPierre Ossman __ATTR_NULL, 4704101c16aSPierre Ossman }; 4714101c16aSPierre Ossman 4724101c16aSPierre Ossman /* 4734101c16aSPierre Ossman * Adds sysfs entries as relevant. 4744101c16aSPierre Ossman */ 4754101c16aSPierre Ossman static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) 4764101c16aSPierre Ossman { 4774101c16aSPierre Ossman int ret; 4784101c16aSPierre Ossman 4794101c16aSPierre Ossman ret = mmc_add_attrs(card, mmc_dev_attrs); 4804101c16aSPierre Ossman if (ret < 0) 4814101c16aSPierre Ossman return ret; 4824101c16aSPierre Ossman 4834101c16aSPierre Ossman return 0; 4844101c16aSPierre Ossman } 4854101c16aSPierre Ossman 4864101c16aSPierre Ossman /* 4874101c16aSPierre Ossman * Removes the sysfs entries added by mmc_sysfs_add(). 4884101c16aSPierre Ossman */ 4894101c16aSPierre Ossman static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) 4904101c16aSPierre Ossman { 4914101c16aSPierre Ossman mmc_remove_attrs(card, mmc_dev_attrs); 4924101c16aSPierre Ossman } 4934101c16aSPierre Ossman 4946abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 4956abaa0c9SPierre Ossman 4966abaa0c9SPierre Ossman /* 4976abaa0c9SPierre Ossman * Suspend callback from host. 4986abaa0c9SPierre Ossman */ 4996abaa0c9SPierre Ossman static void mmc_suspend(struct mmc_host *host) 5006abaa0c9SPierre Ossman { 5016abaa0c9SPierre Ossman BUG_ON(!host); 5026abaa0c9SPierre Ossman BUG_ON(!host->card); 5036abaa0c9SPierre Ossman 5046abaa0c9SPierre Ossman mmc_claim_host(host); 5056abaa0c9SPierre Ossman mmc_deselect_cards(host); 5066abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5076abaa0c9SPierre Ossman mmc_release_host(host); 5086abaa0c9SPierre Ossman } 5096abaa0c9SPierre Ossman 5106abaa0c9SPierre Ossman /* 5116abaa0c9SPierre Ossman * Resume callback from host. 5126abaa0c9SPierre Ossman * 5136abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5146abaa0c9SPierre Ossman * and, if so, restore all state to it. 5156abaa0c9SPierre Ossman */ 5166abaa0c9SPierre Ossman static void mmc_resume(struct mmc_host *host) 5176abaa0c9SPierre Ossman { 5186abaa0c9SPierre Ossman int err; 5196abaa0c9SPierre Ossman 5206abaa0c9SPierre Ossman BUG_ON(!host); 5216abaa0c9SPierre Ossman BUG_ON(!host->card); 5226abaa0c9SPierre Ossman 5236abaa0c9SPierre Ossman mmc_claim_host(host); 5248c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, host->card); 5252986d0bfSPierre Ossman mmc_release_host(host); 5262986d0bfSPierre Ossman 52717b0429dSPierre Ossman if (err) { 5284101c16aSPierre Ossman mmc_remove(host); 5292986d0bfSPierre Ossman 5302986d0bfSPierre Ossman mmc_claim_host(host); 5316abaa0c9SPierre Ossman mmc_detach_bus(host); 5322986d0bfSPierre Ossman mmc_release_host(host); 5336abaa0c9SPierre Ossman } 5346abaa0c9SPierre Ossman 5356abaa0c9SPierre Ossman } 5366abaa0c9SPierre Ossman 5376abaa0c9SPierre Ossman #else 5386abaa0c9SPierre Ossman 5396abaa0c9SPierre Ossman #define mmc_suspend NULL 5406abaa0c9SPierre Ossman #define mmc_resume NULL 5416abaa0c9SPierre Ossman 5426abaa0c9SPierre Ossman #endif 5436abaa0c9SPierre Ossman 5446abaa0c9SPierre Ossman static const struct mmc_bus_ops mmc_ops = { 5456abaa0c9SPierre Ossman .remove = mmc_remove, 5466abaa0c9SPierre Ossman .detect = mmc_detect, 5474101c16aSPierre Ossman .sysfs_add = mmc_sysfs_add, 5484101c16aSPierre Ossman .sysfs_remove = mmc_sysfs_remove, 5496abaa0c9SPierre Ossman .suspend = mmc_suspend, 5506abaa0c9SPierre Ossman .resume = mmc_resume, 5516abaa0c9SPierre Ossman }; 5526abaa0c9SPierre Ossman 5536abaa0c9SPierre Ossman /* 5546abaa0c9SPierre Ossman * Starting point for MMC card init. 5556abaa0c9SPierre Ossman */ 5566abaa0c9SPierre Ossman int mmc_attach_mmc(struct mmc_host *host, u32 ocr) 5576abaa0c9SPierre Ossman { 5586abaa0c9SPierre Ossman int err; 5596abaa0c9SPierre Ossman 5606abaa0c9SPierre Ossman BUG_ON(!host); 5616abaa0c9SPierre Ossman BUG_ON(!host->claimed); 5626abaa0c9SPierre Ossman 5636abaa0c9SPierre Ossman mmc_attach_bus(host, &mmc_ops); 5646abaa0c9SPierre Ossman 5656abaa0c9SPierre Ossman /* 5666abaa0c9SPierre Ossman * Sanity check the voltages that the card claims to 5676abaa0c9SPierre Ossman * support. 5686abaa0c9SPierre Ossman */ 5696abaa0c9SPierre Ossman if (ocr & 0x7F) { 5706abaa0c9SPierre Ossman printk(KERN_WARNING "%s: card claims to support voltages " 5716abaa0c9SPierre Ossman "below the defined range. These will be ignored.\n", 5726abaa0c9SPierre Ossman mmc_hostname(host)); 5736abaa0c9SPierre Ossman ocr &= ~0x7F; 5746abaa0c9SPierre Ossman } 5756abaa0c9SPierre Ossman 5766abaa0c9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 5776abaa0c9SPierre Ossman 5786abaa0c9SPierre Ossman /* 5796abaa0c9SPierre Ossman * Can we support the voltage of the card? 5806abaa0c9SPierre Ossman */ 581109b5bedSPierre Ossman if (!host->ocr) { 582109b5bedSPierre Ossman err = -EINVAL; 5836abaa0c9SPierre Ossman goto err; 584109b5bedSPierre Ossman } 5856abaa0c9SPierre Ossman 5866abaa0c9SPierre Ossman /* 5876abaa0c9SPierre Ossman * Detect and init the card. 5886abaa0c9SPierre Ossman */ 5898c75deaeSPierre Ossman err = mmc_init_card(host, host->ocr, NULL); 59017b0429dSPierre Ossman if (err) 5916abaa0c9SPierre Ossman goto err; 5926abaa0c9SPierre Ossman 5936abaa0c9SPierre Ossman mmc_release_host(host); 5946abaa0c9SPierre Ossman 5954101c16aSPierre Ossman err = mmc_add_card(host->card); 5967ea239d9SPierre Ossman if (err) 5972986d0bfSPierre Ossman goto remove_card; 5987ea239d9SPierre Ossman 5997ea239d9SPierre Ossman return 0; 6007ea239d9SPierre Ossman 6012986d0bfSPierre Ossman remove_card: 6026abaa0c9SPierre Ossman mmc_remove_card(host->card); 6037ea239d9SPierre Ossman host->card = NULL; 6042986d0bfSPierre Ossman mmc_claim_host(host); 6057ea239d9SPierre Ossman err: 6067ea239d9SPierre Ossman mmc_detach_bus(host); 6077ea239d9SPierre Ossman mmc_release_host(host); 6087ea239d9SPierre Ossman 609109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", 610109b5bedSPierre Ossman mmc_hostname(host), err); 611109b5bedSPierre Ossman 612adf66a0dSPierre Ossman return err; 6137ea239d9SPierre Ossman } 6147ea239d9SPierre Ossman 615