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: 152facba917SPierre 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 resp[3] = card->raw_scr[1]; 1707ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1717ea239d9SPierre Ossman 1727ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1737ea239d9SPierre Ossman if (scr_struct != 0) { 174facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", 1757ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 176bd766312SPierre Ossman return -EINVAL; 1777ea239d9SPierre Ossman } 1787ea239d9SPierre Ossman 1797ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1807ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 181bd766312SPierre Ossman 182bd766312SPierre Ossman return 0; 1837ea239d9SPierre Ossman } 1847ea239d9SPierre Ossman 1857ea239d9SPierre Ossman /* 1861addfcdbSPierre Ossman * Fetches and decodes switch information 1877ea239d9SPierre Ossman */ 1881addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 1897ea239d9SPierre Ossman { 1907ea239d9SPierre Ossman int err; 1917ea239d9SPierre Ossman u8 *status; 1927ea239d9SPierre Ossman 1933373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 19417b0429dSPierre Ossman return 0; 1953373c0aeSPierre Ossman 1963373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 1973373c0aeSPierre Ossman printk(KERN_WARNING "%s: card lacks mandatory switch " 1983373c0aeSPierre Ossman "function, performance might suffer.\n", 1993373c0aeSPierre Ossman mmc_hostname(card->host)); 20017b0429dSPierre Ossman return 0; 2013373c0aeSPierre Ossman } 2023373c0aeSPierre Ossman 20317b0429dSPierre Ossman err = -EIO; 2047ea239d9SPierre Ossman 2057ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2067ea239d9SPierre Ossman if (!status) { 207facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 208facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 20917b0429dSPierre Ossman return -ENOMEM; 2107ea239d9SPierre Ossman } 2117ea239d9SPierre Ossman 2127ea239d9SPierre Ossman err = mmc_sd_switch(card, 0, 0, 1, status); 21317b0429dSPierre Ossman if (err) { 214adf66a0dSPierre Ossman /* 215adf66a0dSPierre Ossman * We all hosts that cannot perform the command 216adf66a0dSPierre Ossman * to fail more gracefully 217adf66a0dSPierre Ossman */ 218adf66a0dSPierre Ossman if (err != -EINVAL) 219adf66a0dSPierre Ossman goto out; 220adf66a0dSPierre Ossman 2213373c0aeSPierre Ossman printk(KERN_WARNING "%s: problem reading switch " 2223373c0aeSPierre Ossman "capabilities, performance might suffer.\n", 2233373c0aeSPierre Ossman mmc_hostname(card->host)); 22417b0429dSPierre Ossman err = 0; 225adf66a0dSPierre Ossman 2267ea239d9SPierre Ossman goto out; 2277ea239d9SPierre Ossman } 2287ea239d9SPierre Ossman 2297ea239d9SPierre Ossman if (status[13] & 0x02) 2307ea239d9SPierre Ossman card->sw_caps.hs_max_dtr = 50000000; 2317ea239d9SPierre Ossman 2321addfcdbSPierre Ossman out: 2331addfcdbSPierre Ossman kfree(status); 2341addfcdbSPierre Ossman 2351addfcdbSPierre Ossman return err; 2361addfcdbSPierre Ossman } 2371addfcdbSPierre Ossman 2381addfcdbSPierre Ossman /* 2391addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 2401addfcdbSPierre Ossman */ 2411addfcdbSPierre Ossman static int mmc_switch_hs(struct mmc_card *card) 2421addfcdbSPierre Ossman { 2431addfcdbSPierre Ossman int err; 2441addfcdbSPierre Ossman u8 *status; 2451addfcdbSPierre Ossman 2463373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 24717b0429dSPierre Ossman return 0; 2483373c0aeSPierre Ossman 2493373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 25017b0429dSPierre Ossman return 0; 2513373c0aeSPierre Ossman 2521addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 25317b0429dSPierre Ossman return 0; 2541addfcdbSPierre Ossman 2551addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 25617b0429dSPierre Ossman return 0; 2571addfcdbSPierre Ossman 25817b0429dSPierre Ossman err = -EIO; 2591addfcdbSPierre Ossman 2601addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 2611addfcdbSPierre Ossman if (!status) { 262facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 263facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 26417b0429dSPierre Ossman return -ENOMEM; 2651addfcdbSPierre Ossman } 2661addfcdbSPierre Ossman 2677ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 26817b0429dSPierre Ossman if (err) 2697ea239d9SPierre Ossman goto out; 2707ea239d9SPierre Ossman 2717ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 2727ea239d9SPierre Ossman printk(KERN_WARNING "%s: Problem switching card " 2737ea239d9SPierre Ossman "into high-speed mode!\n", 2747ea239d9SPierre Ossman mmc_hostname(card->host)); 2757ea239d9SPierre Ossman } else { 2767ea239d9SPierre Ossman mmc_card_set_highspeed(card); 2777ea239d9SPierre Ossman mmc_set_timing(card->host, MMC_TIMING_SD_HS); 2787ea239d9SPierre Ossman } 2797ea239d9SPierre Ossman 2807ea239d9SPierre Ossman out: 2817ea239d9SPierre Ossman kfree(status); 2827ea239d9SPierre Ossman 2837ea239d9SPierre Ossman return err; 2847ea239d9SPierre Ossman } 2857ea239d9SPierre Ossman 2867ea239d9SPierre Ossman /* 2876abaa0c9SPierre Ossman * Handle the detection and initialisation of a card. 2886abaa0c9SPierre Ossman * 2896abaa0c9SPierre Ossman * In the case of a resume, "curcard" will contain the card 2906abaa0c9SPierre Ossman * we're trying to reinitialise. 2916abaa0c9SPierre Ossman */ 2926abaa0c9SPierre Ossman static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 2936abaa0c9SPierre Ossman struct mmc_card *oldcard) 2946abaa0c9SPierre Ossman { 2956abaa0c9SPierre Ossman struct mmc_card *card; 2966abaa0c9SPierre Ossman int err; 2976abaa0c9SPierre Ossman u32 cid[4]; 2986abaa0c9SPierre Ossman unsigned int max_dtr; 2996abaa0c9SPierre Ossman 3006abaa0c9SPierre Ossman BUG_ON(!host); 301d84075c8SPierre Ossman WARN_ON(!host->claimed); 3026abaa0c9SPierre Ossman 3036abaa0c9SPierre Ossman /* 3046abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 3056abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 3066abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 3076abaa0c9SPierre Ossman * respond. 3086abaa0c9SPierre Ossman */ 3096abaa0c9SPierre Ossman mmc_go_idle(host); 3106abaa0c9SPierre Ossman 3116abaa0c9SPierre Ossman /* 3126abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 3136abaa0c9SPierre Ossman * compliant card and we should set bit 30 3146abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 3156abaa0c9SPierre Ossman * block-addressed SDHC cards. 3166abaa0c9SPierre Ossman */ 3176abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 31817b0429dSPierre Ossman if (!err) 3196abaa0c9SPierre Ossman ocr |= 1 << 30; 3206abaa0c9SPierre Ossman 3216abaa0c9SPierre Ossman err = mmc_send_app_op_cond(host, ocr, NULL); 32217b0429dSPierre Ossman if (err) 3236abaa0c9SPierre Ossman goto err; 3246abaa0c9SPierre Ossman 3256abaa0c9SPierre Ossman /* 326af517150SDavid Brownell * For SPI, enable CRC as appropriate. 327af517150SDavid Brownell */ 328af517150SDavid Brownell if (mmc_host_is_spi(host)) { 329af517150SDavid Brownell err = mmc_spi_set_crc(host, use_spi_crc); 330af517150SDavid Brownell if (err) 331af517150SDavid Brownell goto err; 332af517150SDavid Brownell } 333af517150SDavid Brownell 334af517150SDavid Brownell /* 3356abaa0c9SPierre Ossman * Fetch CID from card. 3366abaa0c9SPierre Ossman */ 337af517150SDavid Brownell if (mmc_host_is_spi(host)) 338af517150SDavid Brownell err = mmc_send_cid(host, cid); 339af517150SDavid Brownell else 3406abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 34117b0429dSPierre Ossman if (err) 3426abaa0c9SPierre Ossman goto err; 3436abaa0c9SPierre Ossman 3446abaa0c9SPierre Ossman if (oldcard) { 345adf66a0dSPierre Ossman if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { 346adf66a0dSPierre Ossman err = -ENOENT; 3476abaa0c9SPierre Ossman goto err; 348adf66a0dSPierre Ossman } 3496abaa0c9SPierre Ossman 3506abaa0c9SPierre Ossman card = oldcard; 3516abaa0c9SPierre Ossman } else { 3526abaa0c9SPierre Ossman /* 3536abaa0c9SPierre Ossman * Allocate card structure. 3546abaa0c9SPierre Ossman */ 3556abaa0c9SPierre Ossman card = mmc_alloc_card(host); 356adf66a0dSPierre Ossman if (IS_ERR(card)) { 357adf66a0dSPierre Ossman err = PTR_ERR(card); 3586abaa0c9SPierre Ossman goto err; 359adf66a0dSPierre Ossman } 3606abaa0c9SPierre Ossman 3616abaa0c9SPierre Ossman card->type = MMC_TYPE_SD; 3626abaa0c9SPierre Ossman memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 3636abaa0c9SPierre Ossman } 3646abaa0c9SPierre Ossman 3656abaa0c9SPierre Ossman /* 366af517150SDavid Brownell * For native busses: get card RCA and quit open drain mode. 3676abaa0c9SPierre Ossman */ 368af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 3696abaa0c9SPierre Ossman err = mmc_send_relative_addr(host, &card->rca); 37017b0429dSPierre Ossman if (err) 3716abaa0c9SPierre Ossman goto free_card; 3726abaa0c9SPierre Ossman 3736abaa0c9SPierre Ossman mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 374af517150SDavid Brownell } 3756abaa0c9SPierre Ossman 3766abaa0c9SPierre Ossman if (!oldcard) { 3776abaa0c9SPierre Ossman /* 3786abaa0c9SPierre Ossman * Fetch CSD from card. 3796abaa0c9SPierre Ossman */ 3806abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 38117b0429dSPierre Ossman if (err) 3826abaa0c9SPierre Ossman goto free_card; 3836abaa0c9SPierre Ossman 384bd766312SPierre Ossman err = mmc_decode_csd(card); 385adf66a0dSPierre Ossman if (err) 386bd766312SPierre Ossman goto free_card; 387bd766312SPierre Ossman 3886abaa0c9SPierre Ossman mmc_decode_cid(card); 3896abaa0c9SPierre Ossman } 3906abaa0c9SPierre Ossman 3916abaa0c9SPierre Ossman /* 3926abaa0c9SPierre Ossman * Select card, as all following commands rely on that. 3936abaa0c9SPierre Ossman */ 394af517150SDavid Brownell if (!mmc_host_is_spi(host)) { 3956abaa0c9SPierre Ossman err = mmc_select_card(card); 39617b0429dSPierre Ossman if (err) 3976abaa0c9SPierre Ossman goto free_card; 398af517150SDavid Brownell } 3996abaa0c9SPierre Ossman 4006abaa0c9SPierre Ossman if (!oldcard) { 4016abaa0c9SPierre Ossman /* 4026abaa0c9SPierre Ossman * Fetch SCR from card. 4036abaa0c9SPierre Ossman */ 4046abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 40517b0429dSPierre Ossman if (err) 4066abaa0c9SPierre Ossman goto free_card; 4076abaa0c9SPierre Ossman 408bd766312SPierre Ossman err = mmc_decode_scr(card); 409bd766312SPierre Ossman if (err < 0) 410bd766312SPierre Ossman goto free_card; 4116abaa0c9SPierre Ossman 4126abaa0c9SPierre Ossman /* 4136abaa0c9SPierre Ossman * Fetch switch information from card. 4146abaa0c9SPierre Ossman */ 4156abaa0c9SPierre Ossman err = mmc_read_switch(card); 41617b0429dSPierre Ossman if (err) 4176abaa0c9SPierre Ossman goto free_card; 4186abaa0c9SPierre Ossman } 4196abaa0c9SPierre Ossman 4206abaa0c9SPierre Ossman /* 4216abaa0c9SPierre Ossman * Attempt to change to high-speed (if supported) 4226abaa0c9SPierre Ossman */ 4236abaa0c9SPierre Ossman err = mmc_switch_hs(card); 42417b0429dSPierre Ossman if (err) 4256abaa0c9SPierre Ossman goto free_card; 4266abaa0c9SPierre Ossman 4276abaa0c9SPierre Ossman /* 4286abaa0c9SPierre Ossman * Compute bus speed. 4296abaa0c9SPierre Ossman */ 4306abaa0c9SPierre Ossman max_dtr = (unsigned int)-1; 4316abaa0c9SPierre Ossman 4326abaa0c9SPierre Ossman if (mmc_card_highspeed(card)) { 4336abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 4346abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 4356abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 4366abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 4376abaa0c9SPierre Ossman } 4386abaa0c9SPierre Ossman 4396abaa0c9SPierre Ossman mmc_set_clock(host, max_dtr); 4406abaa0c9SPierre Ossman 4416abaa0c9SPierre Ossman /* 4426abaa0c9SPierre Ossman * Switch to wider bus (if supported). 4436abaa0c9SPierre Ossman */ 44471651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 4456abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 4466abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 44717b0429dSPierre Ossman if (err) 4486abaa0c9SPierre Ossman goto free_card; 4496abaa0c9SPierre Ossman 4506abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 4516abaa0c9SPierre Ossman } 4526abaa0c9SPierre Ossman 453c3bff2ecSPierre Ossman /* 454c3bff2ecSPierre Ossman * Check if read-only switch is active. 455c3bff2ecSPierre Ossman */ 456c3bff2ecSPierre Ossman if (!oldcard) { 457c3bff2ecSPierre Ossman if (!host->ops->get_ro) { 458c3bff2ecSPierre Ossman printk(KERN_WARNING "%s: host does not " 459c3bff2ecSPierre Ossman "support reading read-only " 460c3bff2ecSPierre Ossman "switch. assuming write-enable.\n", 461c3bff2ecSPierre Ossman mmc_hostname(host)); 462c3bff2ecSPierre Ossman } else { 463c3bff2ecSPierre Ossman if (host->ops->get_ro(host)) 464c3bff2ecSPierre Ossman mmc_card_set_readonly(card); 465c3bff2ecSPierre Ossman } 466c3bff2ecSPierre Ossman } 467c3bff2ecSPierre Ossman 4686abaa0c9SPierre Ossman if (!oldcard) 4696abaa0c9SPierre Ossman host->card = card; 4706abaa0c9SPierre Ossman 47117b0429dSPierre Ossman return 0; 4726abaa0c9SPierre Ossman 4736abaa0c9SPierre Ossman free_card: 4746abaa0c9SPierre Ossman if (!oldcard) 4756abaa0c9SPierre Ossman mmc_remove_card(card); 4766abaa0c9SPierre Ossman err: 4776abaa0c9SPierre Ossman 478adf66a0dSPierre Ossman return err; 4796abaa0c9SPierre Ossman } 4806abaa0c9SPierre Ossman 4816abaa0c9SPierre Ossman /* 4827ea239d9SPierre Ossman * Host is being removed. Free up the current card. 4837ea239d9SPierre Ossman */ 4847ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 4857ea239d9SPierre Ossman { 4867ea239d9SPierre Ossman BUG_ON(!host); 4877ea239d9SPierre Ossman BUG_ON(!host->card); 4887ea239d9SPierre Ossman 4897ea239d9SPierre Ossman mmc_remove_card(host->card); 4907ea239d9SPierre Ossman host->card = NULL; 4917ea239d9SPierre Ossman } 4927ea239d9SPierre Ossman 4937ea239d9SPierre Ossman /* 4947ea239d9SPierre Ossman * Card detection callback from host. 4957ea239d9SPierre Ossman */ 4967ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 4977ea239d9SPierre Ossman { 4987ea239d9SPierre Ossman int err; 4997ea239d9SPierre Ossman 5007ea239d9SPierre Ossman BUG_ON(!host); 5017ea239d9SPierre Ossman BUG_ON(!host->card); 5027ea239d9SPierre Ossman 5037ea239d9SPierre Ossman mmc_claim_host(host); 5047ea239d9SPierre Ossman 5057ea239d9SPierre Ossman /* 5067ea239d9SPierre Ossman * Just check if our card has been removed. 5077ea239d9SPierre Ossman */ 5087ea239d9SPierre Ossman err = mmc_send_status(host->card, NULL); 5097ea239d9SPierre Ossman 5107ea239d9SPierre Ossman mmc_release_host(host); 5117ea239d9SPierre Ossman 51217b0429dSPierre Ossman if (err) { 5134101c16aSPierre Ossman mmc_sd_remove(host); 5147ea239d9SPierre Ossman 5157ea239d9SPierre Ossman mmc_claim_host(host); 5167ea239d9SPierre Ossman mmc_detach_bus(host); 5177ea239d9SPierre Ossman mmc_release_host(host); 5187ea239d9SPierre Ossman } 5197ea239d9SPierre Ossman } 5207ea239d9SPierre Ossman 5214101c16aSPierre Ossman MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 5224101c16aSPierre Ossman card->raw_cid[2], card->raw_cid[3]); 5234101c16aSPierre Ossman MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 5244101c16aSPierre Ossman card->raw_csd[2], card->raw_csd[3]); 5254101c16aSPierre Ossman MMC_ATTR_FN(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 5264101c16aSPierre Ossman MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); 5274101c16aSPierre Ossman MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); 5284101c16aSPierre Ossman MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); 5294101c16aSPierre Ossman MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); 5304101c16aSPierre Ossman MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); 5314101c16aSPierre Ossman MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); 5324101c16aSPierre Ossman MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); 5334101c16aSPierre Ossman 5344101c16aSPierre Ossman static struct device_attribute mmc_sd_dev_attrs[] = { 5354101c16aSPierre Ossman MMC_ATTR_RO(cid), 5364101c16aSPierre Ossman MMC_ATTR_RO(csd), 5374101c16aSPierre Ossman MMC_ATTR_RO(scr), 5384101c16aSPierre Ossman MMC_ATTR_RO(date), 5394101c16aSPierre Ossman MMC_ATTR_RO(fwrev), 5404101c16aSPierre Ossman MMC_ATTR_RO(hwrev), 5414101c16aSPierre Ossman MMC_ATTR_RO(manfid), 5424101c16aSPierre Ossman MMC_ATTR_RO(name), 5434101c16aSPierre Ossman MMC_ATTR_RO(oemid), 5444101c16aSPierre Ossman MMC_ATTR_RO(serial), 5454101c16aSPierre Ossman __ATTR_NULL, 5464101c16aSPierre Ossman }; 5474101c16aSPierre Ossman 5484101c16aSPierre Ossman /* 5494101c16aSPierre Ossman * Adds sysfs entries as relevant. 5504101c16aSPierre Ossman */ 5514101c16aSPierre Ossman static int mmc_sd_sysfs_add(struct mmc_host *host, struct mmc_card *card) 5524101c16aSPierre Ossman { 5534101c16aSPierre Ossman int ret; 5544101c16aSPierre Ossman 5554101c16aSPierre Ossman ret = mmc_add_attrs(card, mmc_sd_dev_attrs); 5564101c16aSPierre Ossman if (ret < 0) 5574101c16aSPierre Ossman return ret; 5584101c16aSPierre Ossman 5594101c16aSPierre Ossman return 0; 5604101c16aSPierre Ossman } 5614101c16aSPierre Ossman 5624101c16aSPierre Ossman /* 5634101c16aSPierre Ossman * Removes the sysfs entries added by mmc_sysfs_add(). 5644101c16aSPierre Ossman */ 5654101c16aSPierre Ossman static void mmc_sd_sysfs_remove(struct mmc_host *host, struct mmc_card *card) 5664101c16aSPierre Ossman { 5674101c16aSPierre Ossman mmc_remove_attrs(card, mmc_sd_dev_attrs); 5684101c16aSPierre Ossman } 5694101c16aSPierre Ossman 5706abaa0c9SPierre Ossman #ifdef CONFIG_MMC_UNSAFE_RESUME 5716abaa0c9SPierre Ossman 5726abaa0c9SPierre Ossman /* 5736abaa0c9SPierre Ossman * Suspend callback from host. 5746abaa0c9SPierre Ossman */ 5756abaa0c9SPierre Ossman static void mmc_sd_suspend(struct mmc_host *host) 5766abaa0c9SPierre Ossman { 5776abaa0c9SPierre Ossman BUG_ON(!host); 5786abaa0c9SPierre Ossman BUG_ON(!host->card); 5796abaa0c9SPierre Ossman 5806abaa0c9SPierre Ossman mmc_claim_host(host); 581af517150SDavid Brownell if (!mmc_host_is_spi(host)) 5826abaa0c9SPierre Ossman mmc_deselect_cards(host); 5836abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 5846abaa0c9SPierre Ossman mmc_release_host(host); 5856abaa0c9SPierre Ossman } 5866abaa0c9SPierre Ossman 5876abaa0c9SPierre Ossman /* 5886abaa0c9SPierre Ossman * Resume callback from host. 5896abaa0c9SPierre Ossman * 5906abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 5916abaa0c9SPierre Ossman * and, if so, restore all state to it. 5926abaa0c9SPierre Ossman */ 5936abaa0c9SPierre Ossman static void mmc_sd_resume(struct mmc_host *host) 5946abaa0c9SPierre Ossman { 5956abaa0c9SPierre Ossman int err; 5966abaa0c9SPierre Ossman 5976abaa0c9SPierre Ossman BUG_ON(!host); 5986abaa0c9SPierre Ossman BUG_ON(!host->card); 5996abaa0c9SPierre Ossman 6006abaa0c9SPierre Ossman mmc_claim_host(host); 6016abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 6022986d0bfSPierre Ossman mmc_release_host(host); 6032986d0bfSPierre Ossman 60417b0429dSPierre Ossman if (err) { 6054101c16aSPierre Ossman mmc_sd_remove(host); 6062986d0bfSPierre Ossman 6072986d0bfSPierre Ossman mmc_claim_host(host); 6086abaa0c9SPierre Ossman mmc_detach_bus(host); 6092986d0bfSPierre Ossman mmc_release_host(host); 6106abaa0c9SPierre Ossman } 6116abaa0c9SPierre Ossman 6126abaa0c9SPierre Ossman } 6136abaa0c9SPierre Ossman 6146abaa0c9SPierre Ossman #else 6156abaa0c9SPierre Ossman 6166abaa0c9SPierre Ossman #define mmc_sd_suspend NULL 6176abaa0c9SPierre Ossman #define mmc_sd_resume NULL 6186abaa0c9SPierre Ossman 6196abaa0c9SPierre Ossman #endif 6206abaa0c9SPierre Ossman 6217ea239d9SPierre Ossman static const struct mmc_bus_ops mmc_sd_ops = { 6227ea239d9SPierre Ossman .remove = mmc_sd_remove, 6237ea239d9SPierre Ossman .detect = mmc_sd_detect, 6244101c16aSPierre Ossman .sysfs_add = mmc_sd_sysfs_add, 6254101c16aSPierre Ossman .sysfs_remove = mmc_sd_sysfs_remove, 6266abaa0c9SPierre Ossman .suspend = mmc_sd_suspend, 6276abaa0c9SPierre Ossman .resume = mmc_sd_resume, 6287ea239d9SPierre Ossman }; 6297ea239d9SPierre Ossman 6307ea239d9SPierre Ossman /* 6317ea239d9SPierre Ossman * Starting point for SD card init. 6327ea239d9SPierre Ossman */ 6337ea239d9SPierre Ossman int mmc_attach_sd(struct mmc_host *host, u32 ocr) 6347ea239d9SPierre Ossman { 6357ea239d9SPierre Ossman int err; 6367ea239d9SPierre Ossman 6377ea239d9SPierre Ossman BUG_ON(!host); 638d84075c8SPierre Ossman WARN_ON(!host->claimed); 6397ea239d9SPierre Ossman 6407ea239d9SPierre Ossman mmc_attach_bus(host, &mmc_sd_ops); 6417ea239d9SPierre Ossman 64255556da0SPhilip Langdale /* 643af517150SDavid Brownell * We need to get OCR a different way for SPI. 644af517150SDavid Brownell */ 645af517150SDavid Brownell if (mmc_host_is_spi(host)) { 646af517150SDavid Brownell mmc_go_idle(host); 647af517150SDavid Brownell 648af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 649af517150SDavid Brownell if (err) 650af517150SDavid Brownell goto err; 651af517150SDavid Brownell } 652af517150SDavid Brownell 653af517150SDavid Brownell /* 65455556da0SPhilip Langdale * Sanity check the voltages that the card claims to 65555556da0SPhilip Langdale * support. 65655556da0SPhilip Langdale */ 65755556da0SPhilip Langdale if (ocr & 0x7F) { 65855556da0SPhilip Langdale printk(KERN_WARNING "%s: card claims to support voltages " 65955556da0SPhilip Langdale "below the defined range. These will be ignored.\n", 66055556da0SPhilip Langdale mmc_hostname(host)); 66155556da0SPhilip Langdale ocr &= ~0x7F; 66255556da0SPhilip Langdale } 66355556da0SPhilip Langdale 66455556da0SPhilip Langdale if (ocr & MMC_VDD_165_195) { 66555556da0SPhilip Langdale printk(KERN_WARNING "%s: SD card claims to support the " 66655556da0SPhilip Langdale "incompletely defined 'low voltage range'. This " 66755556da0SPhilip Langdale "will be ignored.\n", mmc_hostname(host)); 66855556da0SPhilip Langdale ocr &= ~MMC_VDD_165_195; 66955556da0SPhilip Langdale } 67055556da0SPhilip Langdale 6717ea239d9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 6727ea239d9SPierre Ossman 6737ea239d9SPierre Ossman /* 6747ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 6757ea239d9SPierre Ossman */ 676109b5bedSPierre Ossman if (!host->ocr) { 677109b5bedSPierre Ossman err = -EINVAL; 6787ea239d9SPierre Ossman goto err; 679109b5bedSPierre Ossman } 6807ea239d9SPierre Ossman 6817ea239d9SPierre Ossman /* 6826abaa0c9SPierre Ossman * Detect and init the card. 6837ea239d9SPierre Ossman */ 6846abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 68517b0429dSPierre Ossman if (err) 6867ea239d9SPierre Ossman goto err; 6877ea239d9SPierre Ossman 6887ea239d9SPierre Ossman mmc_release_host(host); 6897ea239d9SPierre Ossman 6904101c16aSPierre Ossman err = mmc_add_card(host->card); 6917ea239d9SPierre Ossman if (err) 6922986d0bfSPierre Ossman goto remove_card; 6937ea239d9SPierre Ossman 6947ea239d9SPierre Ossman return 0; 6957ea239d9SPierre Ossman 6962986d0bfSPierre Ossman remove_card: 6976abaa0c9SPierre Ossman mmc_remove_card(host->card); 6987ea239d9SPierre Ossman host->card = NULL; 6992986d0bfSPierre Ossman mmc_claim_host(host); 7007ea239d9SPierre Ossman err: 7017ea239d9SPierre Ossman mmc_detach_bus(host); 7027ea239d9SPierre Ossman mmc_release_host(host); 7037ea239d9SPierre Ossman 704109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising SD card\n", 705109b5bedSPierre Ossman mmc_hostname(host), err); 706109b5bedSPierre Ossman 707adf66a0dSPierre Ossman return err; 7087ea239d9SPierre Ossman } 7097ea239d9SPierre Ossman 710