17ea239d9SPierre Ossman /* 270f10482SPierre Ossman * linux/drivers/mmc/core/sd.c 37ea239d9SPierre Ossman * 47ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved. 57ea239d9SPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. 67ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, 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> 183373c0aeSPierre Ossman #include <linux/mmc/sd.h> 197ea239d9SPierre Ossman 207ea239d9SPierre Ossman #include "core.h" 217ea239d9SPierre Ossman #include "sysfs.h" 224101c16aSPierre Ossman #include "bus.h" 237ea239d9SPierre Ossman #include "mmc_ops.h" 247ea239d9SPierre Ossman #include "sd_ops.h" 257ea239d9SPierre Ossman 267ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 277ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 287ea239d9SPierre Ossman 0, 0, 0, 0 297ea239d9SPierre Ossman }; 307ea239d9SPierre Ossman 317ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 327ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 337ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 347ea239d9SPierre Ossman }; 357ea239d9SPierre Ossman 367ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 377ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 387ea239d9SPierre Ossman }; 397ea239d9SPierre Ossman 407ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 417ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 427ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 437ea239d9SPierre Ossman }; 447ea239d9SPierre Ossman 457ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 467ea239d9SPierre Ossman ({ \ 477ea239d9SPierre Ossman const int __size = size; \ 487ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 497ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 507ea239d9SPierre Ossman const int __shft = (start) & 31; \ 517ea239d9SPierre Ossman u32 __res; \ 527ea239d9SPierre Ossman \ 537ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 547ea239d9SPierre Ossman if (__size + __shft > 32) \ 557ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 567ea239d9SPierre Ossman __res & __mask; \ 577ea239d9SPierre Ossman }) 587ea239d9SPierre Ossman 597ea239d9SPierre Ossman /* 607ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 617ea239d9SPierre Ossman */ 627ea239d9SPierre Ossman static void mmc_decode_cid(struct mmc_card *card) 637ea239d9SPierre Ossman { 647ea239d9SPierre Ossman u32 *resp = card->raw_cid; 657ea239d9SPierre Ossman 667ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 677ea239d9SPierre Ossman 687ea239d9SPierre Ossman /* 697ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 707ea239d9SPierre Ossman * have to assume we can parse this. 717ea239d9SPierre Ossman */ 727ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 737ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 747ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 757ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 767ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 777ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 787ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 797ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 807ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 817ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 827ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 837ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 847ea239d9SPierre Ossman 857ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 867ea239d9SPierre Ossman } 877ea239d9SPierre Ossman 887ea239d9SPierre Ossman /* 897ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 907ea239d9SPierre Ossman */ 91bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 927ea239d9SPierre Ossman { 937ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 947ea239d9SPierre Ossman unsigned int e, m, csd_struct; 957ea239d9SPierre Ossman u32 *resp = card->raw_csd; 967ea239d9SPierre Ossman 977ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 987ea239d9SPierre Ossman 997ea239d9SPierre Ossman switch (csd_struct) { 1007ea239d9SPierre Ossman case 0: 1017ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1027ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1037ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1047ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1057ea239d9SPierre Ossman 1067ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1077ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1087ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1097ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1107ea239d9SPierre Ossman 1117ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1127ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1137ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1147ea239d9SPierre Ossman 1157ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1167ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1177ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1187ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1197ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1207ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1217ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 1227ea239d9SPierre Ossman break; 1237ea239d9SPierre Ossman case 1: 1247ea239d9SPierre Ossman /* 1257ea239d9SPierre Ossman * This is a block-addressed SDHC card. Most 1267ea239d9SPierre Ossman * interesting fields are unused and have fixed 1277ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1287ea239d9SPierre Ossman * we assume those fixed values ourselves. 1297ea239d9SPierre Ossman */ 1307ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1317ea239d9SPierre Ossman 1327ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1337ea239d9SPierre Ossman csd->tacc_clks = 0; /* Unused */ 1347ea239d9SPierre Ossman 1357ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1367ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1377ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1387ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1397ea239d9SPierre Ossman 1407ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1417ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1427ea239d9SPierre Ossman 1437ea239d9SPierre Ossman csd->read_blkbits = 9; 1447ea239d9SPierre Ossman csd->read_partial = 0; 1457ea239d9SPierre Ossman csd->write_misalign = 0; 1467ea239d9SPierre Ossman csd->read_misalign = 0; 1477ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1487ea239d9SPierre Ossman csd->write_blkbits = 9; 1497ea239d9SPierre Ossman csd->write_partial = 0; 1507ea239d9SPierre Ossman break; 1517ea239d9SPierre Ossman default: 152*facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1537ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 154bd766312SPierre Ossman return -EINVAL; 1557ea239d9SPierre Ossman } 156bd766312SPierre Ossman 157bd766312SPierre Ossman return 0; 1587ea239d9SPierre Ossman } 1597ea239d9SPierre Ossman 1607ea239d9SPierre Ossman /* 1617ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1627ea239d9SPierre Ossman */ 163bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1647ea239d9SPierre Ossman { 1657ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1667ea239d9SPierre Ossman unsigned int scr_struct; 1677ea239d9SPierre Ossman u32 resp[4]; 1687ea239d9SPierre Ossman 1697ea239d9SPierre Ossman BUG_ON(!mmc_card_sd(card)); 1707ea239d9SPierre Ossman 1717ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1727ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1737ea239d9SPierre Ossman 1747ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1757ea239d9SPierre Ossman if (scr_struct != 0) { 176*facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", 1777ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 178bd766312SPierre Ossman return -EINVAL; 1797ea239d9SPierre Ossman } 1807ea239d9SPierre Ossman 1817ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1827ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 183bd766312SPierre Ossman 184bd766312SPierre Ossman return 0; 1857ea239d9SPierre Ossman } 1867ea239d9SPierre Ossman 1877ea239d9SPierre Ossman /* 1881addfcdbSPierre Ossman * Fetches and decodes switch information 1897ea239d9SPierre Ossman */ 1901addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 1917ea239d9SPierre Ossman { 1927ea239d9SPierre Ossman int err; 1937ea239d9SPierre Ossman u8 *status; 1947ea239d9SPierre Ossman 1953373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 1963373c0aeSPierre Ossman return MMC_ERR_NONE; 1973373c0aeSPierre Ossman 1983373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 1993373c0aeSPierre Ossman printk(KERN_WARNING "%s: card lacks mandatory switch " 2003373c0aeSPierre Ossman "function, performance might suffer.\n", 2013373c0aeSPierre Ossman mmc_hostname(card->host)); 2023373c0aeSPierre Ossman return MMC_ERR_NONE; 2033373c0aeSPierre Ossman } 2043373c0aeSPierre Ossman 2057ea239d9SPierre Ossman err = MMC_ERR_FAILED; 2067ea239d9SPierre Ossman 2077ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2087ea239d9SPierre Ossman if (!status) { 209*facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 210*facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 2117ea239d9SPierre Ossman return err; 2127ea239d9SPierre Ossman } 2137ea239d9SPierre Ossman 2147ea239d9SPierre Ossman err = mmc_sd_switch(card, 0, 0, 1, status); 2157ea239d9SPierre Ossman if (err != MMC_ERR_NONE) { 2163373c0aeSPierre Ossman printk(KERN_WARNING "%s: problem reading switch " 2173373c0aeSPierre Ossman "capabilities, performance might suffer.\n", 2183373c0aeSPierre Ossman mmc_hostname(card->host)); 2197ea239d9SPierre Ossman err = MMC_ERR_NONE; 2207ea239d9SPierre Ossman goto out; 2217ea239d9SPierre Ossman } 2227ea239d9SPierre Ossman 2237ea239d9SPierre Ossman if (status[13] & 0x02) 2247ea239d9SPierre Ossman card->sw_caps.hs_max_dtr = 50000000; 2257ea239d9SPierre Ossman 2261addfcdbSPierre Ossman out: 2271addfcdbSPierre Ossman kfree(status); 2281addfcdbSPierre Ossman 2291addfcdbSPierre Ossman return err; 2301addfcdbSPierre Ossman } 2311addfcdbSPierre Ossman 2321addfcdbSPierre Ossman /* 2331addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 2341addfcdbSPierre Ossman */ 2351addfcdbSPierre Ossman static int mmc_switch_hs(struct mmc_card *card) 2361addfcdbSPierre Ossman { 2371addfcdbSPierre Ossman int err; 2381addfcdbSPierre Ossman u8 *status; 2391addfcdbSPierre Ossman 2403373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 2413373c0aeSPierre Ossman return MMC_ERR_NONE; 2423373c0aeSPierre Ossman 2433373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 2443373c0aeSPierre Ossman return MMC_ERR_NONE; 2453373c0aeSPierre Ossman 2461addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 2471addfcdbSPierre Ossman return MMC_ERR_NONE; 2481addfcdbSPierre Ossman 2491addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 2501addfcdbSPierre Ossman return MMC_ERR_NONE; 2511addfcdbSPierre Ossman 2521addfcdbSPierre Ossman err = MMC_ERR_FAILED; 2531addfcdbSPierre Ossman 2541addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 2551addfcdbSPierre Ossman if (!status) { 256*facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 257*facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 2581addfcdbSPierre Ossman return err; 2591addfcdbSPierre Ossman } 2601addfcdbSPierre Ossman 2617ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 2627ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 2637ea239d9SPierre Ossman goto out; 2647ea239d9SPierre Ossman 2657ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 2667ea239d9SPierre Ossman printk(KERN_WARNING "%s: Problem switching card " 2677ea239d9SPierre Ossman "into high-speed mode!\n", 2687ea239d9SPierre Ossman mmc_hostname(card->host)); 2697ea239d9SPierre Ossman } else { 2707ea239d9SPierre Ossman mmc_card_set_highspeed(card); 2717ea239d9SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_SD_HS); 2727ea239d9SPierre Ossman } 2737ea239d9SPierre Ossman 2747ea239d9SPierre Ossman out: 2757ea239d9SPierre Ossman kfree(status); 2767ea239d9SPierre Ossman 2777ea239d9SPierre Ossman return err; 2787ea239d9SPierre Ossman } 2797ea239d9SPierre Ossman 2807ea239d9SPierre Ossman /* 2816abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2826abaa0c9SPierre Ossman * 2836abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2846abaa0c9SPierre Ossman * we're trying to reinitialise. 2856abaa0c9SPierre Ossman */ 2866abaa0c9SPierre Ossman static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 2876abaa0c9SPierre Ossman struct mmc_card *oldcard) 2886abaa0c9SPierre Ossman { 2896abaa0c9SPierre Ossman struct mmc_card *card; 2906abaa0c9SPierre Ossman int err; 2916abaa0c9SPierre Ossman u32 cid[4]; 2926abaa0c9SPierre Ossman unsigned int max_dtr; 2936abaa0c9SPierre Ossman 2946abaa0c9SPierre Ossman BUG_ON(!host); 2956abaa0c9SPierre Ossman BUG_ON(!host->claimed); 2966abaa0c9SPierre Ossman 2976abaa0c9SPierre Ossman /* 2986abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 2996abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 3006abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 3016abaa0c9SPierre Ossman * respond. 3026abaa0c9SPierre Ossman */ 3036abaa0c9SPierre Ossman mmc_go_idle(host); 3046abaa0c9SPierre Ossman 3056abaa0c9SPierre Ossman /* 3066abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 3076abaa0c9SPierre Ossman * compliant card and we should set bit 30 3086abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 3096abaa0c9SPierre Ossman * block-addressed SDHC cards. 3106abaa0c9SPierre Ossman */ 3116abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 3126abaa0c9SPierre Ossman if (err == MMC_ERR_NONE) 3136abaa0c9SPierre Ossman ocr |= 1 << 30; 3146abaa0c9SPierre Ossman 3156abaa0c9SPierre Ossman err = mmc_send_app_op_cond(host, ocr, NULL); 3166abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3176abaa0c9SPierre Ossman goto err; 3186abaa0c9SPierre Ossman 3196abaa0c9SPierre Ossman /* 3206abaa0c9SPierre Ossman * Fetch CID from card. 3216abaa0c9SPierre Ossman */ 3226abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 3236abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3246abaa0c9SPierre Ossman goto err; 3256abaa0c9SPierre Ossman 3266abaa0c9SPierre Ossman if (oldcard) { 3276abaa0c9SPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 3286abaa0c9SPierre Ossman goto err; 3296abaa0c9SPierre Ossman 3306abaa0c9SPierre Ossman card = oldcard; 3316abaa0c9SPierre Ossman } else { 3326abaa0c9SPierre Ossman /* 3336abaa0c9SPierre Ossman * Allocate card structure. 3346abaa0c9SPierre Ossman */ 3356abaa0c9SPierre Ossman card = mmc_alloc_card(host); 3366abaa0c9SPierre Ossman if (IS_ERR(card)) 3376abaa0c9SPierre Ossman goto err; 3386abaa0c9SPierre Ossman 3396abaa0c9SPierre Ossman card->type = MMC_TYPE_SD; 3406abaa0c9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3416abaa0c9SPierre Ossman } 3426abaa0c9SPierre Ossman 3436abaa0c9SPierre Ossman /* 3446abaa0c9SPierre Ossman * Set card RCA. 3456abaa0c9SPierre Ossman */ 3466abaa0c9SPierre Ossman err = mmc_send_relative_addr(host, &card->rca); 3476abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3486abaa0c9SPierre Ossman goto free_card; 3496abaa0c9SPierre Ossman 3506abaa0c9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 3516abaa0c9SPierre Ossman 3526abaa0c9SPierre Ossman if (!oldcard) { 3536abaa0c9SPierre Ossman /* 3546abaa0c9SPierre Ossman * Fetch CSD from card. 3556abaa0c9SPierre Ossman */ 3566abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 3576abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3586abaa0c9SPierre Ossman goto free_card; 3596abaa0c9SPierre Ossman 360bd766312SPierre Ossman err = mmc_decode_csd(card); 361bd766312SPierre Ossman if (err < 0) 362bd766312SPierre Ossman goto free_card; 363bd766312SPierre Ossman 3646abaa0c9SPierre Ossman mmc_decode_cid(card); 3656abaa0c9SPierre Ossman } 3666abaa0c9SPierre Ossman 3676abaa0c9SPierre Ossman /* 3686abaa0c9SPierre Ossman * Select card, as all following commands rely on that. 3696abaa0c9SPierre Ossman */ 3706abaa0c9SPierre Ossman err = mmc_select_card(card); 3716abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3726abaa0c9SPierre Ossman goto free_card; 3736abaa0c9SPierre Ossman 3746abaa0c9SPierre Ossman if (!oldcard) { 3756abaa0c9SPierre Ossman /* 3766abaa0c9SPierre Ossman * Fetch SCR from card. 3776abaa0c9SPierre Ossman */ 3786abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 3796abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3806abaa0c9SPierre Ossman goto free_card; 3816abaa0c9SPierre Ossman 382bd766312SPierre Ossman err = mmc_decode_scr(card); 383bd766312SPierre Ossman if (err < 0) 384bd766312SPierre Ossman goto free_card; 3856abaa0c9SPierre Ossman 3866abaa0c9SPierre Ossman /* 3876abaa0c9SPierre Ossman * Fetch switch information from card. 3886abaa0c9SPierre Ossman */ 3896abaa0c9SPierre Ossman err = mmc_read_switch(card); 3906abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3916abaa0c9SPierre Ossman goto free_card; 3926abaa0c9SPierre Ossman } 3936abaa0c9SPierre Ossman 3946abaa0c9SPierre Ossman /* 3956abaa0c9SPierre Ossman * Attempt to change to high-speed (if supported) 3966abaa0c9SPierre Ossman */ 3976abaa0c9SPierre Ossman err = mmc_switch_hs(card); 3986abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 3996abaa0c9SPierre Ossman goto free_card; 4006abaa0c9SPierre Ossman 4016abaa0c9SPierre Ossman /* 4026abaa0c9SPierre Ossman * Compute bus speed. 4036abaa0c9SPierre Ossman */ 4046abaa0c9SPierre Ossman max_dtr = (unsigned int)-1; 4056abaa0c9SPierre Ossman 4066abaa0c9SPierre Ossman if (mmc_card_highspeed(card)) { 4076abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 4086abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 4096abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 4106abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 4116abaa0c9SPierre Ossman } 4126abaa0c9SPierre Ossman 4136abaa0c9SPierre Ossman mmc_set_clock(host, max_dtr); 4146abaa0c9SPierre Ossman 4156abaa0c9SPierre Ossman /* 4166abaa0c9SPierre Ossman * Switch to wider bus (if supported). 4176abaa0c9SPierre Ossman */ 41871651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 4196abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 4206abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 4216abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) 4226abaa0c9SPierre Ossman goto free_card; 4236abaa0c9SPierre Ossman 4246abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 4256abaa0c9SPierre Ossman } 4266abaa0c9SPierre Ossman 427c3bff2ecSPierre Ossman /* 428c3bff2ecSPierre Ossman * Check if read-only switch is active. 429c3bff2ecSPierre Ossman */ 430c3bff2ecSPierre Ossman if (!oldcard) { 431c3bff2ecSPierre Ossman if (!host->ops->get_ro) { 432c3bff2ecSPierre Ossman printk(KERN_WARNING "%s: host does not " 433c3bff2ecSPierre Ossman "support reading read-only " 434c3bff2ecSPierre Ossman "switch. assuming write-enable.\n", 435c3bff2ecSPierre Ossman mmc_hostname(host)); 436c3bff2ecSPierre Ossman } else { 437c3bff2ecSPierre Ossman if (host->ops->get_ro(host)) 438c3bff2ecSPierre Ossman mmc_card_set_readonly(card); 439c3bff2ecSPierre Ossman } 440c3bff2ecSPierre Ossman } 441c3bff2ecSPierre Ossman 4426abaa0c9SPierre Ossman if (!oldcard) 4436abaa0c9SPierre Ossman host->card = card; 4446abaa0c9SPierre Ossman 4456abaa0c9SPierre Ossman return MMC_ERR_NONE; 4466abaa0c9SPierre Ossman 4476abaa0c9SPierre Ossman free_card: 4486abaa0c9SPierre Ossman if (!oldcard) 4496abaa0c9SPierre Ossman mmc_remove_card(card); 4506abaa0c9SPierre Ossman err: 4516abaa0c9SPierre Ossman 4526abaa0c9SPierre Ossman return MMC_ERR_FAILED; 4536abaa0c9SPierre Ossman } 4546abaa0c9SPierre Ossman 4556abaa0c9SPierre Ossman /* 4567ea239d9SPierre Ossman * Host is being removed. Free up the current card. 4577ea239d9SPierre Ossman */ 4587ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 4597ea239d9SPierre Ossman { 4607ea239d9SPierre Ossman BUG_ON(!host); 4617ea239d9SPierre Ossman BUG_ON(!host->card); 4627ea239d9SPierre Ossman 4637ea239d9SPierre Ossman mmc_remove_card(host->card); 4647ea239d9SPierre Ossman host->card = NULL; 4657ea239d9SPierre Ossman } 4667ea239d9SPierre Ossman 4677ea239d9SPierre Ossman /* 4687ea239d9SPierre Ossman * Card detection callback from host. 4697ea239d9SPierre Ossman */ 4707ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 4717ea239d9SPierre Ossman { 4727ea239d9SPierre Ossman int err; 4737ea239d9SPierre Ossman 4747ea239d9SPierre Ossman BUG_ON(!host); 4757ea239d9SPierre Ossman BUG_ON(!host->card); 4767ea239d9SPierre Ossman 4777ea239d9SPierre Ossman mmc_claim_host(host); 4787ea239d9SPierre Ossman 4797ea239d9SPierre Ossman /* 4807ea239d9SPierre Ossman * Just check if our card has been removed. 4817ea239d9SPierre Ossman */ 4827ea239d9SPierre Ossman err = mmc_send_status(host->card, NULL); 4837ea239d9SPierre Ossman 4847ea239d9SPierre Ossman mmc_release_host(host); 4857ea239d9SPierre Ossman 4867ea239d9SPierre Ossman if (err != MMC_ERR_NONE) { 4874101c16aSPierre Ossman mmc_sd_remove(host); 4887ea239d9SPierre Ossman 4897ea239d9SPierre Ossman mmc_claim_host(host); 4907ea239d9SPierre Ossman mmc_detach_bus(host); 4917ea239d9SPierre Ossman mmc_release_host(host); 4927ea239d9SPierre Ossman } 4937ea239d9SPierre Ossman } 4947ea239d9SPierre Ossman 4954101c16aSPierre Ossman MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 4964101c16aSPierre Ossman card->raw_cid[2], card->raw_cid[3]); 4974101c16aSPierre Ossman MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 4984101c16aSPierre Ossman card->raw_csd[2], card->raw_csd[3]); 4994101c16aSPierre Ossman MMC_ATTR_FN(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 5004101c16aSPierre Ossman MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); 5014101c16aSPierre Ossman MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); 5024101c16aSPierre Ossman MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); 5034101c16aSPierre Ossman MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); 5044101c16aSPierre Ossman MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); 5054101c16aSPierre Ossman MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); 5064101c16aSPierre Ossman MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); 5074101c16aSPierre Ossman 5084101c16aSPierre Ossman static struct device_attribute mmc_sd_dev_attrs[] = { 5094101c16aSPierre Ossman MMC_ATTR_RO(cid), 5104101c16aSPierre Ossman MMC_ATTR_RO(csd), 5114101c16aSPierre Ossman MMC_ATTR_RO(scr), 5124101c16aSPierre Ossman MMC_ATTR_RO(date), 5134101c16aSPierre Ossman MMC_ATTR_RO(fwrev), 5144101c16aSPierre Ossman MMC_ATTR_RO(hwrev), 5154101c16aSPierre Ossman MMC_ATTR_RO(manfid), 5164101c16aSPierre Ossman MMC_ATTR_RO(name), 5174101c16aSPierre Ossman MMC_ATTR_RO(oemid), 5184101c16aSPierre Ossman MMC_ATTR_RO(serial), 5194101c16aSPierre Ossman __ATTR_NULL, 5204101c16aSPierre Ossman }; 5214101c16aSPierre Ossman 5224101c16aSPierre Ossman /* 5234101c16aSPierre Ossman * Adds sysfs entries as relevant. 5244101c16aSPierre Ossman */ 5254101c16aSPierre Ossman static int mmc_sd_sysfs_add(struct mmc_host *host, struct mmc_card *card) 5264101c16aSPierre Ossman { 5274101c16aSPierre Ossman int ret; 5284101c16aSPierre Ossman 5294101c16aSPierre Ossman ret = mmc_add_attrs(card, mmc_sd_dev_attrs); 5304101c16aSPierre Ossman if (ret < 0) 5314101c16aSPierre Ossman return ret; 5324101c16aSPierre Ossman 5334101c16aSPierre Ossman return 0; 5344101c16aSPierre Ossman } 5354101c16aSPierre Ossman 5364101c16aSPierre Ossman /* 5374101c16aSPierre Ossman * Removes the sysfs entries added by mmc_sysfs_add(). 5384101c16aSPierre Ossman */ 5394101c16aSPierre Ossman static void mmc_sd_sysfs_remove(struct mmc_host *host, struct mmc_card *card) 5404101c16aSPierre Ossman { 5414101c16aSPierre Ossman mmc_remove_attrs(card, mmc_sd_dev_attrs); 5424101c16aSPierre Ossman } 5434101c16aSPierre Ossman 5446abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 5456abaa0c9SPierre Ossman 5466abaa0c9SPierre Ossman /* 5476abaa0c9SPierre Ossman * Suspend callback from host. 5486abaa0c9SPierre Ossman */ 5496abaa0c9SPierre Ossman static void mmc_sd_suspend(struct mmc_host *host) 5506abaa0c9SPierre Ossman { 5516abaa0c9SPierre Ossman BUG_ON(!host); 5526abaa0c9SPierre Ossman BUG_ON(!host->card); 5536abaa0c9SPierre Ossman 5546abaa0c9SPierre Ossman mmc_claim_host(host); 5556abaa0c9SPierre Ossman mmc_deselect_cards(host); 5566abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5576abaa0c9SPierre Ossman mmc_release_host(host); 5586abaa0c9SPierre Ossman } 5596abaa0c9SPierre Ossman 5606abaa0c9SPierre Ossman /* 5616abaa0c9SPierre Ossman * Resume callback from host. 5626abaa0c9SPierre Ossman * 5636abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5646abaa0c9SPierre Ossman * and, if so, restore all state to it. 5656abaa0c9SPierre Ossman */ 5666abaa0c9SPierre Ossman static void mmc_sd_resume(struct mmc_host *host) 5676abaa0c9SPierre Ossman { 5686abaa0c9SPierre Ossman int err; 5696abaa0c9SPierre Ossman 5706abaa0c9SPierre Ossman BUG_ON(!host); 5716abaa0c9SPierre Ossman BUG_ON(!host->card); 5726abaa0c9SPierre Ossman 5736abaa0c9SPierre Ossman mmc_claim_host(host); 5746abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 5752986d0bfSPierre Ossman mmc_release_host(host); 5762986d0bfSPierre Ossman 5776abaa0c9SPierre Ossman if (err != MMC_ERR_NONE) { 5784101c16aSPierre Ossman mmc_sd_remove(host); 5792986d0bfSPierre Ossman 5802986d0bfSPierre Ossman mmc_claim_host(host); 5816abaa0c9SPierre Ossman mmc_detach_bus(host); 5822986d0bfSPierre Ossman mmc_release_host(host); 5836abaa0c9SPierre Ossman } 5846abaa0c9SPierre Ossman 5856abaa0c9SPierre Ossman } 5866abaa0c9SPierre Ossman 5876abaa0c9SPierre Ossman #else 5886abaa0c9SPierre Ossman 5896abaa0c9SPierre Ossman #define mmc_sd_suspend NULL 5906abaa0c9SPierre Ossman #define mmc_sd_resume NULL 5916abaa0c9SPierre Ossman 5926abaa0c9SPierre Ossman #endif 5936abaa0c9SPierre Ossman 5947ea239d9SPierre Ossman static const struct mmc_bus_ops mmc_sd_ops = { 5957ea239d9SPierre Ossman .remove = mmc_sd_remove, 5967ea239d9SPierre Ossman .detect = mmc_sd_detect, 5974101c16aSPierre Ossman .sysfs_add = mmc_sd_sysfs_add, 5984101c16aSPierre Ossman .sysfs_remove = mmc_sd_sysfs_remove, 5996abaa0c9SPierre Ossman .suspend = mmc_sd_suspend, 6006abaa0c9SPierre Ossman .resume = mmc_sd_resume, 6017ea239d9SPierre Ossman }; 6027ea239d9SPierre Ossman 6037ea239d9SPierre Ossman /* 6047ea239d9SPierre Ossman * Starting point for SD card init. 6057ea239d9SPierre Ossman */ 6067ea239d9SPierre Ossman int mmc_attach_sd(struct mmc_host *host, u32 ocr) 6077ea239d9SPierre Ossman { 6087ea239d9SPierre Ossman int err; 6097ea239d9SPierre Ossman 6107ea239d9SPierre Ossman BUG_ON(!host); 6117ea239d9SPierre Ossman BUG_ON(!host->claimed); 6127ea239d9SPierre Ossman 6137ea239d9SPierre Ossman mmc_attach_bus(host, &mmc_sd_ops); 6147ea239d9SPierre Ossman 61555556da0SPhilip Langdale /* 61655556da0SPhilip Langdale * Sanity check the voltages that the card claims to 61755556da0SPhilip Langdale * support. 61855556da0SPhilip Langdale */ 61955556da0SPhilip Langdale if (ocr & 0x7F) { 62055556da0SPhilip Langdale printk(KERN_WARNING "%s: card claims to support voltages " 62155556da0SPhilip Langdale "below the defined range. These will be ignored.\n", 62255556da0SPhilip Langdale mmc_hostname(host)); 62355556da0SPhilip Langdale ocr &= ~0x7F; 62455556da0SPhilip Langdale } 62555556da0SPhilip Langdale 62655556da0SPhilip Langdale if (ocr & MMC_VDD_165_195) { 62755556da0SPhilip Langdale printk(KERN_WARNING "%s: SD card claims to support the " 62855556da0SPhilip Langdale "incompletely defined 'low voltage range'. This " 62955556da0SPhilip Langdale "will be ignored.\n", mmc_hostname(host)); 63055556da0SPhilip Langdale ocr &= ~MMC_VDD_165_195; 63155556da0SPhilip Langdale } 63255556da0SPhilip Langdale 6337ea239d9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 6347ea239d9SPierre Ossman 6357ea239d9SPierre Ossman /* 6367ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 6377ea239d9SPierre Ossman */ 638109b5bedSPierre Ossman if (!host->ocr) { 639109b5bedSPierre Ossman err = -EINVAL; 6407ea239d9SPierre Ossman goto err; 641109b5bedSPierre Ossman } 6427ea239d9SPierre Ossman 6437ea239d9SPierre Ossman /* 6446abaa0c9SPierre Ossman * Detect and init the card. 6457ea239d9SPierre Ossman */ 6466abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 6477ea239d9SPierre Ossman if (err != MMC_ERR_NONE) 6487ea239d9SPierre Ossman goto err; 6497ea239d9SPierre Ossman 6507ea239d9SPierre Ossman mmc_release_host(host); 6517ea239d9SPierre Ossman 6524101c16aSPierre Ossman err = mmc_add_card(host->card); 6537ea239d9SPierre Ossman if (err) 6542986d0bfSPierre Ossman goto remove_card; 6557ea239d9SPierre Ossman 6567ea239d9SPierre Ossman return 0; 6577ea239d9SPierre Ossman 6582986d0bfSPierre Ossman remove_card: 6596abaa0c9SPierre Ossman mmc_remove_card(host->card); 6607ea239d9SPierre Ossman host->card = NULL; 6612986d0bfSPierre Ossman mmc_claim_host(host); 6627ea239d9SPierre Ossman err: 6637ea239d9SPierre Ossman mmc_detach_bus(host); 6647ea239d9SPierre Ossman mmc_release_host(host); 6657ea239d9SPierre Ossman 666109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising SD card\n", 667109b5bedSPierre Ossman mmc_hostname(host), err); 668109b5bedSPierre Ossman 6697ea239d9SPierre Ossman return 0; 6707ea239d9SPierre Ossman } 6717ea239d9SPierre Ossman 672