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> 145a0e3ad6STejun Heo #include <linux/slab.h> 157ea239d9SPierre Ossman 167ea239d9SPierre Ossman #include <linux/mmc/host.h> 177ea239d9SPierre Ossman #include <linux/mmc/card.h> 187ea239d9SPierre Ossman #include <linux/mmc/mmc.h> 193373c0aeSPierre Ossman #include <linux/mmc/sd.h> 207ea239d9SPierre Ossman 217ea239d9SPierre Ossman #include "core.h" 224101c16aSPierre Ossman #include "bus.h" 237ea239d9SPierre Ossman #include "mmc_ops.h" 24ce101496SMark Brown #include "sd.h" 257ea239d9SPierre Ossman #include "sd_ops.h" 267ea239d9SPierre Ossman 277ea239d9SPierre Ossman static const unsigned int tran_exp[] = { 287ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000, 297ea239d9SPierre Ossman 0, 0, 0, 0 307ea239d9SPierre Ossman }; 317ea239d9SPierre Ossman 327ea239d9SPierre Ossman static const unsigned char tran_mant[] = { 337ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 347ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 357ea239d9SPierre Ossman }; 367ea239d9SPierre Ossman 377ea239d9SPierre Ossman static const unsigned int tacc_exp[] = { 387ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 397ea239d9SPierre Ossman }; 407ea239d9SPierre Ossman 417ea239d9SPierre Ossman static const unsigned int tacc_mant[] = { 427ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30, 437ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80, 447ea239d9SPierre Ossman }; 457ea239d9SPierre Ossman 467ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \ 477ea239d9SPierre Ossman ({ \ 487ea239d9SPierre Ossman const int __size = size; \ 497ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 507ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \ 517ea239d9SPierre Ossman const int __shft = (start) & 31; \ 527ea239d9SPierre Ossman u32 __res; \ 537ea239d9SPierre Ossman \ 547ea239d9SPierre Ossman __res = resp[__off] >> __shft; \ 557ea239d9SPierre Ossman if (__size + __shft > 32) \ 567ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \ 577ea239d9SPierre Ossman __res & __mask; \ 587ea239d9SPierre Ossman }) 597ea239d9SPierre Ossman 607ea239d9SPierre Ossman /* 617ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure. 627ea239d9SPierre Ossman */ 6371578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card) 647ea239d9SPierre Ossman { 657ea239d9SPierre Ossman u32 *resp = card->raw_cid; 667ea239d9SPierre Ossman 677ea239d9SPierre Ossman memset(&card->cid, 0, sizeof(struct mmc_cid)); 687ea239d9SPierre Ossman 697ea239d9SPierre Ossman /* 707ea239d9SPierre Ossman * SD doesn't currently have a version field so we will 717ea239d9SPierre Ossman * have to assume we can parse this. 727ea239d9SPierre Ossman */ 737ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); 747ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); 757ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); 767ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); 777ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); 787ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); 797ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); 807ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); 817ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); 827ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32); 837ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8); 847ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4); 857ea239d9SPierre Ossman 867ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */ 877ea239d9SPierre Ossman } 887ea239d9SPierre Ossman 897ea239d9SPierre Ossman /* 907ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure. 917ea239d9SPierre Ossman */ 92bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card) 937ea239d9SPierre Ossman { 947ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd; 957ea239d9SPierre Ossman unsigned int e, m, csd_struct; 967ea239d9SPierre Ossman u32 *resp = card->raw_csd; 977ea239d9SPierre Ossman 987ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2); 997ea239d9SPierre Ossman 1007ea239d9SPierre Ossman switch (csd_struct) { 1017ea239d9SPierre Ossman case 0: 1027ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4); 1037ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3); 1047ea239d9SPierre Ossman csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; 1057ea239d9SPierre Ossman csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; 1067ea239d9SPierre Ossman 1077ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1087ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1097ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1107ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1117ea239d9SPierre Ossman 1127ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3); 1137ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12); 1147ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2); 1157ea239d9SPierre Ossman 1167ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); 1177ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1); 1187ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); 1197ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); 1207ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); 1217ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); 1227ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1); 123dfe86cbaSAdrian Hunter 124dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) { 125dfe86cbaSAdrian Hunter csd->erase_size = 1; 126dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) { 127dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; 128dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9; 129dfe86cbaSAdrian Hunter } 1307ea239d9SPierre Ossman break; 1317ea239d9SPierre Ossman case 1: 1327ea239d9SPierre Ossman /* 1333a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most 1347ea239d9SPierre Ossman * interesting fields are unused and have fixed 1357ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards, 1367ea239d9SPierre Ossman * we assume those fixed values ourselves. 1377ea239d9SPierre Ossman */ 1387ea239d9SPierre Ossman mmc_card_set_blockaddr(card); 1397ea239d9SPierre Ossman 1407ea239d9SPierre Ossman csd->tacc_ns = 0; /* Unused */ 1417ea239d9SPierre Ossman csd->tacc_clks = 0; /* Unused */ 1427ea239d9SPierre Ossman 1437ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4); 1447ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3); 1457ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m]; 1467ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); 1473a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22); 1483a303511SArindam Nath 1493a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ 1503a303511SArindam Nath if (csd->c_size >= 0xFFFF) 1513a303511SArindam Nath mmc_card_set_ext_capacity(card); 1527ea239d9SPierre Ossman 1537ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22); 1547ea239d9SPierre Ossman csd->capacity = (1 + m) << 10; 1557ea239d9SPierre Ossman 1567ea239d9SPierre Ossman csd->read_blkbits = 9; 1577ea239d9SPierre Ossman csd->read_partial = 0; 1587ea239d9SPierre Ossman csd->write_misalign = 0; 1597ea239d9SPierre Ossman csd->read_misalign = 0; 1607ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */ 1617ea239d9SPierre Ossman csd->write_blkbits = 9; 1627ea239d9SPierre Ossman csd->write_partial = 0; 163dfe86cbaSAdrian Hunter csd->erase_size = 1; 1647ea239d9SPierre Ossman break; 1657ea239d9SPierre Ossman default: 166facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", 1677ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct); 168bd766312SPierre Ossman return -EINVAL; 1697ea239d9SPierre Ossman } 170bd766312SPierre Ossman 171dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size; 172dfe86cbaSAdrian Hunter 173bd766312SPierre Ossman return 0; 1747ea239d9SPierre Ossman } 1757ea239d9SPierre Ossman 1767ea239d9SPierre Ossman /* 1777ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure. 1787ea239d9SPierre Ossman */ 179bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card) 1807ea239d9SPierre Ossman { 1817ea239d9SPierre Ossman struct sd_scr *scr = &card->scr; 1827ea239d9SPierre Ossman unsigned int scr_struct; 1837ea239d9SPierre Ossman u32 resp[4]; 1847ea239d9SPierre Ossman 1857ea239d9SPierre Ossman resp[3] = card->raw_scr[1]; 1867ea239d9SPierre Ossman resp[2] = card->raw_scr[0]; 1877ea239d9SPierre Ossman 1887ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4); 1897ea239d9SPierre Ossman if (scr_struct != 0) { 190facba917SPierre Ossman printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", 1917ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct); 192bd766312SPierre Ossman return -EINVAL; 1937ea239d9SPierre Ossman } 1947ea239d9SPierre Ossman 1957ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); 1967ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); 197013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2) 198013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */ 199013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); 200bd766312SPierre Ossman 201dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1)) 202dfe86cbaSAdrian Hunter card->erased_byte = 0xFF; 203dfe86cbaSAdrian Hunter else 204dfe86cbaSAdrian Hunter card->erased_byte = 0x0; 205dfe86cbaSAdrian Hunter 206bd766312SPierre Ossman return 0; 2077ea239d9SPierre Ossman } 2087ea239d9SPierre Ossman 2097ea239d9SPierre Ossman /* 210dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 211dfe86cbaSAdrian Hunter */ 212dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card) 213dfe86cbaSAdrian Hunter { 214dfe86cbaSAdrian Hunter unsigned int au, es, et, eo; 215dfe86cbaSAdrian Hunter int err, i; 216dfe86cbaSAdrian Hunter u32 *ssr; 217dfe86cbaSAdrian Hunter 218dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) { 219dfe86cbaSAdrian Hunter printk(KERN_WARNING "%s: card lacks mandatory SD Status " 220dfe86cbaSAdrian Hunter "function.\n", mmc_hostname(card->host)); 221dfe86cbaSAdrian Hunter return 0; 222dfe86cbaSAdrian Hunter } 223dfe86cbaSAdrian Hunter 224dfe86cbaSAdrian Hunter ssr = kmalloc(64, GFP_KERNEL); 225dfe86cbaSAdrian Hunter if (!ssr) 226dfe86cbaSAdrian Hunter return -ENOMEM; 227dfe86cbaSAdrian Hunter 228dfe86cbaSAdrian Hunter err = mmc_app_sd_status(card, ssr); 229dfe86cbaSAdrian Hunter if (err) { 230dfe86cbaSAdrian Hunter printk(KERN_WARNING "%s: problem reading SD Status " 231dfe86cbaSAdrian Hunter "register.\n", mmc_hostname(card->host)); 232dfe86cbaSAdrian Hunter err = 0; 233dfe86cbaSAdrian Hunter goto out; 234dfe86cbaSAdrian Hunter } 235dfe86cbaSAdrian Hunter 236dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++) 237dfe86cbaSAdrian Hunter ssr[i] = be32_to_cpu(ssr[i]); 238dfe86cbaSAdrian Hunter 239dfe86cbaSAdrian Hunter /* 240dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the 241dfe86cbaSAdrian Hunter * bitfield positions accordingly. 242dfe86cbaSAdrian Hunter */ 243dfe86cbaSAdrian Hunter au = UNSTUFF_BITS(ssr, 428 - 384, 4); 244dfe86cbaSAdrian Hunter if (au > 0 || au <= 9) { 245dfe86cbaSAdrian Hunter card->ssr.au = 1 << (au + 4); 246dfe86cbaSAdrian Hunter es = UNSTUFF_BITS(ssr, 408 - 384, 16); 247dfe86cbaSAdrian Hunter et = UNSTUFF_BITS(ssr, 402 - 384, 6); 248dfe86cbaSAdrian Hunter eo = UNSTUFF_BITS(ssr, 400 - 384, 2); 249dfe86cbaSAdrian Hunter if (es && et) { 250dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es; 251dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000; 252dfe86cbaSAdrian Hunter } 253dfe86cbaSAdrian Hunter } else { 254dfe86cbaSAdrian Hunter printk(KERN_WARNING "%s: SD Status: Invalid Allocation Unit " 255dfe86cbaSAdrian Hunter "size.\n", mmc_hostname(card->host)); 256dfe86cbaSAdrian Hunter } 257dfe86cbaSAdrian Hunter out: 258dfe86cbaSAdrian Hunter kfree(ssr); 259dfe86cbaSAdrian Hunter return err; 260dfe86cbaSAdrian Hunter } 261dfe86cbaSAdrian Hunter 262dfe86cbaSAdrian Hunter /* 2631addfcdbSPierre Ossman * Fetches and decodes switch information 2647ea239d9SPierre Ossman */ 2651addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card) 2667ea239d9SPierre Ossman { 2677ea239d9SPierre Ossman int err; 2687ea239d9SPierre Ossman u8 *status; 2697ea239d9SPierre Ossman 2703373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 27117b0429dSPierre Ossman return 0; 2723373c0aeSPierre Ossman 2733373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) { 2743373c0aeSPierre Ossman printk(KERN_WARNING "%s: card lacks mandatory switch " 2753373c0aeSPierre Ossman "function, performance might suffer.\n", 2763373c0aeSPierre Ossman mmc_hostname(card->host)); 27717b0429dSPierre Ossman return 0; 2783373c0aeSPierre Ossman } 2793373c0aeSPierre Ossman 28017b0429dSPierre Ossman err = -EIO; 2817ea239d9SPierre Ossman 2827ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL); 2837ea239d9SPierre Ossman if (!status) { 284facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 285013909c4SArindam Nath "switch capabilities.\n", 286013909c4SArindam Nath mmc_hostname(card->host)); 28717b0429dSPierre Ossman return -ENOMEM; 2887ea239d9SPierre Ossman } 2897ea239d9SPierre Ossman 290013909c4SArindam Nath /* Find out the supported Bus Speed Modes. */ 2917ea239d9SPierre Ossman err = mmc_sd_switch(card, 0, 0, 1, status); 29217b0429dSPierre Ossman if (err) { 293013909c4SArindam Nath /* 294013909c4SArindam Nath * If the host or the card can't do the switch, 295013909c4SArindam Nath * fail more gracefully. 296013909c4SArindam Nath */ 297013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 298adf66a0dSPierre Ossman goto out; 299adf66a0dSPierre Ossman 300013909c4SArindam Nath printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n", 3013373c0aeSPierre Ossman mmc_hostname(card->host)); 30217b0429dSPierre Ossman err = 0; 303adf66a0dSPierre Ossman 3047ea239d9SPierre Ossman goto out; 3057ea239d9SPierre Ossman } 3067ea239d9SPierre Ossman 307013909c4SArindam Nath if (card->scr.sda_spec3) { 308013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13]; 309013909c4SArindam Nath 310013909c4SArindam Nath /* Find out Driver Strengths supported by the card */ 311013909c4SArindam Nath err = mmc_sd_switch(card, 0, 2, 1, status); 312013909c4SArindam Nath if (err) { 313013909c4SArindam Nath /* 314013909c4SArindam Nath * If the host or the card can't do the switch, 315013909c4SArindam Nath * fail more gracefully. 316013909c4SArindam Nath */ 317013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 318013909c4SArindam Nath goto out; 319013909c4SArindam Nath 320013909c4SArindam Nath printk(KERN_WARNING "%s: problem reading " 321013909c4SArindam Nath "Driver Strength.\n", 322013909c4SArindam Nath mmc_hostname(card->host)); 323013909c4SArindam Nath err = 0; 324013909c4SArindam Nath 325013909c4SArindam Nath goto out; 326013909c4SArindam Nath } 327013909c4SArindam Nath 328013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9]; 329013909c4SArindam Nath 330013909c4SArindam Nath /* Find out Current Limits supported by the card */ 331013909c4SArindam Nath err = mmc_sd_switch(card, 0, 3, 1, status); 332013909c4SArindam Nath if (err) { 333013909c4SArindam Nath /* 334013909c4SArindam Nath * If the host or the card can't do the switch, 335013909c4SArindam Nath * fail more gracefully. 336013909c4SArindam Nath */ 337013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) 338013909c4SArindam Nath goto out; 339013909c4SArindam Nath 340013909c4SArindam Nath printk(KERN_WARNING "%s: problem reading " 341013909c4SArindam Nath "Current Limit.\n", 342013909c4SArindam Nath mmc_hostname(card->host)); 343013909c4SArindam Nath err = 0; 344013909c4SArindam Nath 345013909c4SArindam Nath goto out; 346013909c4SArindam Nath } 347013909c4SArindam Nath 348013909c4SArindam Nath card->sw_caps.sd3_curr_limit = status[7]; 349013909c4SArindam Nath } else { 3507ea239d9SPierre Ossman if (status[13] & 0x02) 3517ea239d9SPierre Ossman card->sw_caps.hs_max_dtr = 50000000; 352013909c4SArindam Nath } 3537ea239d9SPierre Ossman 3541addfcdbSPierre Ossman out: 3551addfcdbSPierre Ossman kfree(status); 3561addfcdbSPierre Ossman 3571addfcdbSPierre Ossman return err; 3581addfcdbSPierre Ossman } 3591addfcdbSPierre Ossman 3601addfcdbSPierre Ossman /* 3611addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it. 3621addfcdbSPierre Ossman */ 36371578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card) 3641addfcdbSPierre Ossman { 3651addfcdbSPierre Ossman int err; 3661addfcdbSPierre Ossman u8 *status; 3671addfcdbSPierre Ossman 3683373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1) 36917b0429dSPierre Ossman return 0; 3703373c0aeSPierre Ossman 3713373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) 37217b0429dSPierre Ossman return 0; 3733373c0aeSPierre Ossman 3741addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) 37517b0429dSPierre Ossman return 0; 3761addfcdbSPierre Ossman 3771addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0) 37817b0429dSPierre Ossman return 0; 3791addfcdbSPierre Ossman 38017b0429dSPierre Ossman err = -EIO; 3811addfcdbSPierre Ossman 3821addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL); 3831addfcdbSPierre Ossman if (!status) { 384facba917SPierre Ossman printk(KERN_ERR "%s: could not allocate a buffer for " 385facba917SPierre Ossman "switch capabilities.\n", mmc_hostname(card->host)); 38617b0429dSPierre Ossman return -ENOMEM; 3871addfcdbSPierre Ossman } 3881addfcdbSPierre Ossman 3897ea239d9SPierre Ossman err = mmc_sd_switch(card, 1, 0, 1, status); 39017b0429dSPierre Ossman if (err) 3917ea239d9SPierre Ossman goto out; 3927ea239d9SPierre Ossman 3937ea239d9SPierre Ossman if ((status[16] & 0xF) != 1) { 3947ea239d9SPierre Ossman printk(KERN_WARNING "%s: Problem switching card " 3957ea239d9SPierre Ossman "into high-speed mode!\n", 3967ea239d9SPierre Ossman mmc_hostname(card->host)); 39771578a1eSMichal Miroslaw err = 0; 3987ea239d9SPierre Ossman } else { 39971578a1eSMichal Miroslaw err = 1; 4007ea239d9SPierre Ossman } 4017ea239d9SPierre Ossman 4027ea239d9SPierre Ossman out: 4037ea239d9SPierre Ossman kfree(status); 4047ea239d9SPierre Ossman 4057ea239d9SPierre Ossman return err; 4067ea239d9SPierre Ossman } 4077ea239d9SPierre Ossman 408d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status) 409d6d50a15SArindam Nath { 410d6d50a15SArindam Nath int host_drv_type = 0, card_drv_type = 0; 411d6d50a15SArindam Nath int err; 412d6d50a15SArindam Nath 413d6d50a15SArindam Nath /* 414d6d50a15SArindam Nath * If the host doesn't support any of the Driver Types A,C or D, 415d6d50a15SArindam Nath * default Driver Type B is used. 416d6d50a15SArindam Nath */ 417d6d50a15SArindam Nath if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C 418d6d50a15SArindam Nath | MMC_CAP_DRIVER_TYPE_D))) 419d6d50a15SArindam Nath return 0; 420d6d50a15SArindam Nath 421d6d50a15SArindam Nath if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) { 422d6d50a15SArindam Nath host_drv_type = MMC_SET_DRIVER_TYPE_A; 423d6d50a15SArindam Nath if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) 424d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_A; 425d6d50a15SArindam Nath else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B) 426d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_B; 427d6d50a15SArindam Nath else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) 428d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_C; 429d6d50a15SArindam Nath } else if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) { 430d6d50a15SArindam Nath host_drv_type = MMC_SET_DRIVER_TYPE_C; 431d6d50a15SArindam Nath if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) 432d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_C; 433d6d50a15SArindam Nath } else if (!(card->host->caps & MMC_CAP_DRIVER_TYPE_D)) { 434d6d50a15SArindam Nath /* 435d6d50a15SArindam Nath * If we are here, that means only the default driver type 436d6d50a15SArindam Nath * B is supported by the host. 437d6d50a15SArindam Nath */ 438d6d50a15SArindam Nath host_drv_type = MMC_SET_DRIVER_TYPE_B; 439d6d50a15SArindam Nath if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B) 440d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_B; 441d6d50a15SArindam Nath else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) 442d6d50a15SArindam Nath card_drv_type = MMC_SET_DRIVER_TYPE_C; 443d6d50a15SArindam Nath } 444d6d50a15SArindam Nath 445d6d50a15SArindam Nath err = mmc_sd_switch(card, 1, 2, card_drv_type, status); 446d6d50a15SArindam Nath if (err) 447d6d50a15SArindam Nath return err; 448d6d50a15SArindam Nath 449d6d50a15SArindam Nath if ((status[15] & 0xF) != card_drv_type) { 450d6d50a15SArindam Nath printk(KERN_WARNING "%s: Problem setting driver strength!\n", 451d6d50a15SArindam Nath mmc_hostname(card->host)); 452d6d50a15SArindam Nath return 0; 453d6d50a15SArindam Nath } 454d6d50a15SArindam Nath 455d6d50a15SArindam Nath mmc_set_driver_type(card->host, host_drv_type); 456d6d50a15SArindam Nath 457d6d50a15SArindam Nath return 0; 458d6d50a15SArindam Nath } 459d6d50a15SArindam Nath 46049c468fcSArindam Nath static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) 46149c468fcSArindam Nath { 46249c468fcSArindam Nath unsigned int bus_speed = 0, timing = 0; 46349c468fcSArindam Nath int err; 46449c468fcSArindam Nath 46549c468fcSArindam Nath /* 46649c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on 46749c468fcSArindam Nath * default speed. 46849c468fcSArindam Nath */ 46949c468fcSArindam Nath if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | 47049c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))) 47149c468fcSArindam Nath return 0; 47249c468fcSArindam Nath 47349c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) && 47449c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { 47549c468fcSArindam Nath bus_speed = UHS_SDR104_BUS_SPEED; 47649c468fcSArindam Nath timing = MMC_TIMING_UHS_SDR104; 47749c468fcSArindam Nath card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; 47849c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && 47949c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { 48049c468fcSArindam Nath bus_speed = UHS_DDR50_BUS_SPEED; 48149c468fcSArindam Nath timing = MMC_TIMING_UHS_DDR50; 48249c468fcSArindam Nath card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; 48349c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 48449c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & 48549c468fcSArindam Nath SD_MODE_UHS_SDR50)) { 48649c468fcSArindam Nath bus_speed = UHS_SDR50_BUS_SPEED; 48749c468fcSArindam Nath timing = MMC_TIMING_UHS_SDR50; 48849c468fcSArindam Nath card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; 48949c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 49049c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && 49149c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { 49249c468fcSArindam Nath bus_speed = UHS_SDR25_BUS_SPEED; 49349c468fcSArindam Nath timing = MMC_TIMING_UHS_SDR25; 49449c468fcSArindam Nath card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; 49549c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | 49649c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | 49749c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & 49849c468fcSArindam Nath SD_MODE_UHS_SDR12)) { 49949c468fcSArindam Nath bus_speed = UHS_SDR12_BUS_SPEED; 50049c468fcSArindam Nath timing = MMC_TIMING_UHS_SDR12; 50149c468fcSArindam Nath card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; 50249c468fcSArindam Nath } 50349c468fcSArindam Nath 50449c468fcSArindam Nath card->sd_bus_speed = bus_speed; 50549c468fcSArindam Nath err = mmc_sd_switch(card, 1, 0, bus_speed, status); 50649c468fcSArindam Nath if (err) 50749c468fcSArindam Nath return err; 50849c468fcSArindam Nath 50949c468fcSArindam Nath if ((status[16] & 0xF) != bus_speed) 51049c468fcSArindam Nath printk(KERN_WARNING "%s: Problem setting bus speed mode!\n", 51149c468fcSArindam Nath mmc_hostname(card->host)); 51249c468fcSArindam Nath else { 51349c468fcSArindam Nath mmc_set_timing(card->host, timing); 51449c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); 51549c468fcSArindam Nath } 51649c468fcSArindam Nath 51749c468fcSArindam Nath return 0; 51849c468fcSArindam Nath } 51949c468fcSArindam Nath 5205371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status) 5215371c927SArindam Nath { 5225371c927SArindam Nath int current_limit = 0; 5235371c927SArindam Nath int err; 5245371c927SArindam Nath 5255371c927SArindam Nath /* 5265371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50 5275371c927SArindam Nath * bus speed modes. For other bus speed modes, we set the default 5285371c927SArindam Nath * current limit of 200mA. 5295371c927SArindam Nath */ 5305371c927SArindam Nath if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) || 5315371c927SArindam Nath (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) || 5325371c927SArindam Nath (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) { 5335371c927SArindam Nath if (card->host->caps & MMC_CAP_MAX_CURRENT_800) { 5345371c927SArindam Nath if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) 5355371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800; 5365371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5375371c927SArindam Nath SD_MAX_CURRENT_600) 5385371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 5395371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5405371c927SArindam Nath SD_MAX_CURRENT_400) 5415371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 5425371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5435371c927SArindam Nath SD_MAX_CURRENT_200) 5445371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5455371c927SArindam Nath } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) { 5465371c927SArindam Nath if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) 5475371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600; 5485371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5495371c927SArindam Nath SD_MAX_CURRENT_400) 5505371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 5515371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5525371c927SArindam Nath SD_MAX_CURRENT_200) 5535371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5545371c927SArindam Nath } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) { 5555371c927SArindam Nath if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) 5565371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400; 5575371c927SArindam Nath else if (card->sw_caps.sd3_curr_limit & 5585371c927SArindam Nath SD_MAX_CURRENT_200) 5595371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5605371c927SArindam Nath } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) { 5615371c927SArindam Nath if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) 5625371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5635371c927SArindam Nath } 5645371c927SArindam Nath } else 5655371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200; 5665371c927SArindam Nath 5675371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status); 5685371c927SArindam Nath if (err) 5695371c927SArindam Nath return err; 5705371c927SArindam Nath 5715371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit) 5725371c927SArindam Nath printk(KERN_WARNING "%s: Problem setting current limit!\n", 5735371c927SArindam Nath mmc_hostname(card->host)); 5745371c927SArindam Nath 5755371c927SArindam Nath return 0; 5765371c927SArindam Nath } 5775371c927SArindam Nath 578d6d50a15SArindam Nath /* 579d6d50a15SArindam Nath * UHS-I specific initialization procedure 580d6d50a15SArindam Nath */ 581d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card) 582d6d50a15SArindam Nath { 583d6d50a15SArindam Nath int err; 584d6d50a15SArindam Nath u8 *status; 585d6d50a15SArindam Nath 586d6d50a15SArindam Nath if (!card->scr.sda_spec3) 587d6d50a15SArindam Nath return 0; 588d6d50a15SArindam Nath 589d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH)) 590d6d50a15SArindam Nath return 0; 591d6d50a15SArindam Nath 592d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL); 593d6d50a15SArindam Nath if (!status) { 594d6d50a15SArindam Nath printk(KERN_ERR "%s: could not allocate a buffer for " 595d6d50a15SArindam Nath "switch capabilities.\n", mmc_hostname(card->host)); 596d6d50a15SArindam Nath return -ENOMEM; 597d6d50a15SArindam Nath } 598d6d50a15SArindam Nath 599d6d50a15SArindam Nath /* Set 4-bit bus width */ 600d6d50a15SArindam Nath if ((card->host->caps & MMC_CAP_4_BIT_DATA) && 601d6d50a15SArindam Nath (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 602d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 603d6d50a15SArindam Nath if (err) 604d6d50a15SArindam Nath goto out; 605d6d50a15SArindam Nath 606d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); 607d6d50a15SArindam Nath } 608d6d50a15SArindam Nath 609d6d50a15SArindam Nath /* Set the driver strength for the card */ 610d6d50a15SArindam Nath err = sd_select_driver_type(card, status); 61149c468fcSArindam Nath if (err) 61249c468fcSArindam Nath goto out; 61349c468fcSArindam Nath 61449c468fcSArindam Nath /* Set bus speed mode of the card */ 61549c468fcSArindam Nath err = sd_set_bus_speed_mode(card, status); 6165371c927SArindam Nath if (err) 6175371c927SArindam Nath goto out; 6185371c927SArindam Nath 6195371c927SArindam Nath /* Set current limit for the card */ 6205371c927SArindam Nath err = sd_set_current_limit(card, status); 621d6d50a15SArindam Nath 622d6d50a15SArindam Nath out: 623d6d50a15SArindam Nath kfree(status); 624d6d50a15SArindam Nath 625d6d50a15SArindam Nath return err; 626d6d50a15SArindam Nath } 627d6d50a15SArindam Nath 62851ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], 62951ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]); 63051ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 63151ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]); 63251ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); 63351ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); 634dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); 635dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); 63651ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); 63751ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); 63851ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); 63951ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); 64051ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); 64151ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); 64251ec92e2SPierre Ossman 64351ec92e2SPierre Ossman 64451ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = { 64551ec92e2SPierre Ossman &dev_attr_cid.attr, 64651ec92e2SPierre Ossman &dev_attr_csd.attr, 64751ec92e2SPierre Ossman &dev_attr_scr.attr, 64851ec92e2SPierre Ossman &dev_attr_date.attr, 649dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr, 650dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr, 65151ec92e2SPierre Ossman &dev_attr_fwrev.attr, 65251ec92e2SPierre Ossman &dev_attr_hwrev.attr, 65351ec92e2SPierre Ossman &dev_attr_manfid.attr, 65451ec92e2SPierre Ossman &dev_attr_name.attr, 65551ec92e2SPierre Ossman &dev_attr_oemid.attr, 65651ec92e2SPierre Ossman &dev_attr_serial.attr, 65751ec92e2SPierre Ossman NULL, 65851ec92e2SPierre Ossman }; 65951ec92e2SPierre Ossman 66051ec92e2SPierre Ossman static struct attribute_group sd_std_attr_group = { 66151ec92e2SPierre Ossman .attrs = sd_std_attrs, 66251ec92e2SPierre Ossman }; 66351ec92e2SPierre Ossman 664a4dbd674SDavid Brownell static const struct attribute_group *sd_attr_groups[] = { 66551ec92e2SPierre Ossman &sd_std_attr_group, 66651ec92e2SPierre Ossman NULL, 66751ec92e2SPierre Ossman }; 66851ec92e2SPierre Ossman 66971578a1eSMichal Miroslaw struct device_type sd_type = { 67051ec92e2SPierre Ossman .groups = sd_attr_groups, 67151ec92e2SPierre Ossman }; 67251ec92e2SPierre Ossman 6737ea239d9SPierre Ossman /* 67471578a1eSMichal Miroslaw * Fetch CID from card. 6756abaa0c9SPierre Ossman */ 676d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) 6776abaa0c9SPierre Ossman { 6786abaa0c9SPierre Ossman int err; 6796abaa0c9SPierre Ossman 6806abaa0c9SPierre Ossman /* 6816abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to 6826abaa0c9SPierre Ossman * need to tell some cards to go back to the idle 6836abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to 6846abaa0c9SPierre Ossman * respond. 6856abaa0c9SPierre Ossman */ 6866abaa0c9SPierre Ossman mmc_go_idle(host); 6876abaa0c9SPierre Ossman 6886abaa0c9SPierre Ossman /* 6896abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0 6906abaa0c9SPierre Ossman * compliant card and we should set bit 30 6916abaa0c9SPierre Ossman * of the ocr to indicate that we can handle 6926abaa0c9SPierre Ossman * block-addressed SDHC cards. 6936abaa0c9SPierre Ossman */ 6946abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr); 69517b0429dSPierre Ossman if (!err) 696f2119df6SArindam Nath ocr |= SD_OCR_CCS; 6976abaa0c9SPierre Ossman 698f2119df6SArindam Nath /* 699f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card 700f2119df6SArindam Nath * to switch to 1.8V signaling level. 701f2119df6SArindam Nath */ 702f2119df6SArindam Nath if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | 703f2119df6SArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)) 704f2119df6SArindam Nath ocr |= SD_OCR_S18R; 705f2119df6SArindam Nath 706f2119df6SArindam Nath /* If the host can supply more than 150mA, XPC should be set to 1. */ 707f2119df6SArindam Nath if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 | 708f2119df6SArindam Nath MMC_CAP_SET_XPC_180)) 709f2119df6SArindam Nath ocr |= SD_OCR_XPC; 710f2119df6SArindam Nath 711f2119df6SArindam Nath try_again: 712d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr); 71317b0429dSPierre Ossman if (err) 71471578a1eSMichal Miroslaw return err; 7156abaa0c9SPierre Ossman 716f2119df6SArindam Nath /* 717f2119df6SArindam Nath * In case CCS and S18A in the response is set, start Signal Voltage 718f2119df6SArindam Nath * Switch procedure. SPI mode doesn't support CMD11. 719f2119df6SArindam Nath */ 720d6d50a15SArindam Nath if (!mmc_host_is_spi(host) && rocr && 721d6d50a15SArindam Nath ((*rocr & 0x41000000) == 0x41000000)) { 722f2119df6SArindam Nath err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); 723f2119df6SArindam Nath if (err) { 724f2119df6SArindam Nath ocr &= ~SD_OCR_S18R; 725f2119df6SArindam Nath goto try_again; 726f2119df6SArindam Nath } 727f2119df6SArindam Nath } 728f2119df6SArindam Nath 729af517150SDavid Brownell if (mmc_host_is_spi(host)) 730af517150SDavid Brownell err = mmc_send_cid(host, cid); 731af517150SDavid Brownell else 7326abaa0c9SPierre Ossman err = mmc_all_send_cid(host, cid); 7336abaa0c9SPierre Ossman 73471578a1eSMichal Miroslaw return err; 735adf66a0dSPierre Ossman } 7366abaa0c9SPierre Ossman 73771578a1eSMichal Miroslaw int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) 73871578a1eSMichal Miroslaw { 73971578a1eSMichal Miroslaw int err; 7406abaa0c9SPierre Ossman 7416abaa0c9SPierre Ossman /* 7426abaa0c9SPierre Ossman * Fetch CSD from card. 7436abaa0c9SPierre Ossman */ 7446abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd); 74517b0429dSPierre Ossman if (err) 74671578a1eSMichal Miroslaw return err; 7476abaa0c9SPierre Ossman 748bd766312SPierre Ossman err = mmc_decode_csd(card); 749adf66a0dSPierre Ossman if (err) 75071578a1eSMichal Miroslaw return err; 751bd766312SPierre Ossman 75271578a1eSMichal Miroslaw return 0; 7536abaa0c9SPierre Ossman } 7546abaa0c9SPierre Ossman 75571578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, 75671578a1eSMichal Miroslaw bool reinit) 75771578a1eSMichal Miroslaw { 75871578a1eSMichal Miroslaw int err; 7596abaa0c9SPierre Ossman 76071578a1eSMichal Miroslaw if (!reinit) { 7616abaa0c9SPierre Ossman /* 7626abaa0c9SPierre Ossman * Fetch SCR from card. 7636abaa0c9SPierre Ossman */ 7646abaa0c9SPierre Ossman err = mmc_app_send_scr(card, card->raw_scr); 76517b0429dSPierre Ossman if (err) 76671578a1eSMichal Miroslaw return err; 7676abaa0c9SPierre Ossman 768bd766312SPierre Ossman err = mmc_decode_scr(card); 76971578a1eSMichal Miroslaw if (err) 77071578a1eSMichal Miroslaw return err; 7716abaa0c9SPierre Ossman 7726abaa0c9SPierre Ossman /* 773dfe86cbaSAdrian Hunter * Fetch and process SD Status register. 774dfe86cbaSAdrian Hunter */ 775dfe86cbaSAdrian Hunter err = mmc_read_ssr(card); 776dfe86cbaSAdrian Hunter if (err) 777dfe86cbaSAdrian Hunter return err; 778dfe86cbaSAdrian Hunter 779dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */ 780dfe86cbaSAdrian Hunter mmc_init_erase(card); 781dfe86cbaSAdrian Hunter 782dfe86cbaSAdrian Hunter /* 7836abaa0c9SPierre Ossman * Fetch switch information from card. 7846abaa0c9SPierre Ossman */ 7856abaa0c9SPierre Ossman err = mmc_read_switch(card); 78617b0429dSPierre Ossman if (err) 78771578a1eSMichal Miroslaw return err; 7886abaa0c9SPierre Ossman } 7896abaa0c9SPierre Ossman 7906abaa0c9SPierre Ossman /* 7919d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate. 7929d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the 7939d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able 7949d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks. 7959d9f25c0SWolfgang Muees */ 7969d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) { 7979d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc); 7989d9f25c0SWolfgang Muees if (err) 79971578a1eSMichal Miroslaw return err; 8009d9f25c0SWolfgang Muees } 8019d9f25c0SWolfgang Muees 8029d9f25c0SWolfgang Muees /* 80371578a1eSMichal Miroslaw * Check if read-only switch is active. 8046abaa0c9SPierre Ossman */ 80571578a1eSMichal Miroslaw if (!reinit) { 80671578a1eSMichal Miroslaw int ro = -1; 8076abaa0c9SPierre Ossman 80871578a1eSMichal Miroslaw if (host->ops->get_ro) 80971578a1eSMichal Miroslaw ro = host->ops->get_ro(host); 81071578a1eSMichal Miroslaw 81171578a1eSMichal Miroslaw if (ro < 0) { 81271578a1eSMichal Miroslaw printk(KERN_WARNING "%s: host does not " 81371578a1eSMichal Miroslaw "support reading read-only " 81471578a1eSMichal Miroslaw "switch. assuming write-enable.\n", 81571578a1eSMichal Miroslaw mmc_hostname(host)); 81671578a1eSMichal Miroslaw } else if (ro > 0) { 81771578a1eSMichal Miroslaw mmc_card_set_readonly(card); 81871578a1eSMichal Miroslaw } 81971578a1eSMichal Miroslaw } 82071578a1eSMichal Miroslaw 82171578a1eSMichal Miroslaw return 0; 82271578a1eSMichal Miroslaw } 82371578a1eSMichal Miroslaw 82471578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card) 82571578a1eSMichal Miroslaw { 82671578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1; 8276abaa0c9SPierre Ossman 8286abaa0c9SPierre Ossman if (mmc_card_highspeed(card)) { 8296abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr) 8306abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr; 8316abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) { 8326abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr; 8336abaa0c9SPierre Ossman } 8346abaa0c9SPierre Ossman 83571578a1eSMichal Miroslaw return max_dtr; 83671578a1eSMichal Miroslaw } 83771578a1eSMichal Miroslaw 83871578a1eSMichal Miroslaw void mmc_sd_go_highspeed(struct mmc_card *card) 83971578a1eSMichal Miroslaw { 84071578a1eSMichal Miroslaw mmc_card_set_highspeed(card); 84171578a1eSMichal Miroslaw mmc_set_timing(card->host, MMC_TIMING_SD_HS); 84271578a1eSMichal Miroslaw } 84371578a1eSMichal Miroslaw 84471578a1eSMichal Miroslaw /* 84571578a1eSMichal Miroslaw * Handle the detection and initialisation of a card. 84671578a1eSMichal Miroslaw * 84771578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card 84871578a1eSMichal Miroslaw * we're trying to reinitialise. 84971578a1eSMichal Miroslaw */ 85071578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, 85171578a1eSMichal Miroslaw struct mmc_card *oldcard) 85271578a1eSMichal Miroslaw { 85371578a1eSMichal Miroslaw struct mmc_card *card; 85471578a1eSMichal Miroslaw int err; 85571578a1eSMichal Miroslaw u32 cid[4]; 856d6d50a15SArindam Nath u32 rocr = 0; 85771578a1eSMichal Miroslaw 85871578a1eSMichal Miroslaw BUG_ON(!host); 85971578a1eSMichal Miroslaw WARN_ON(!host->claimed); 86071578a1eSMichal Miroslaw 861d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr); 86271578a1eSMichal Miroslaw if (err) 86371578a1eSMichal Miroslaw return err; 86471578a1eSMichal Miroslaw 86571578a1eSMichal Miroslaw if (oldcard) { 86671578a1eSMichal Miroslaw if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) 86771578a1eSMichal Miroslaw return -ENOENT; 86871578a1eSMichal Miroslaw 86971578a1eSMichal Miroslaw card = oldcard; 87071578a1eSMichal Miroslaw } else { 87171578a1eSMichal Miroslaw /* 87271578a1eSMichal Miroslaw * Allocate card structure. 87371578a1eSMichal Miroslaw */ 87471578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type); 87571578a1eSMichal Miroslaw if (IS_ERR(card)) 87671578a1eSMichal Miroslaw return PTR_ERR(card); 87771578a1eSMichal Miroslaw 87871578a1eSMichal Miroslaw card->type = MMC_TYPE_SD; 87971578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); 88071578a1eSMichal Miroslaw } 88171578a1eSMichal Miroslaw 88271578a1eSMichal Miroslaw /* 88371578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode. 88471578a1eSMichal Miroslaw */ 88571578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 88671578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca); 88771578a1eSMichal Miroslaw if (err) 88871578a1eSMichal Miroslaw return err; 88971578a1eSMichal Miroslaw 89071578a1eSMichal Miroslaw mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); 89171578a1eSMichal Miroslaw } 89271578a1eSMichal Miroslaw 89371578a1eSMichal Miroslaw if (!oldcard) { 89471578a1eSMichal Miroslaw err = mmc_sd_get_csd(host, card); 89571578a1eSMichal Miroslaw if (err) 89671578a1eSMichal Miroslaw return err; 89771578a1eSMichal Miroslaw 89871578a1eSMichal Miroslaw mmc_decode_cid(card); 89971578a1eSMichal Miroslaw } 90071578a1eSMichal Miroslaw 90171578a1eSMichal Miroslaw /* 90271578a1eSMichal Miroslaw * Select card, as all following commands rely on that. 90371578a1eSMichal Miroslaw */ 90471578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) { 90571578a1eSMichal Miroslaw err = mmc_select_card(card); 90671578a1eSMichal Miroslaw if (err) 90771578a1eSMichal Miroslaw return err; 90871578a1eSMichal Miroslaw } 90971578a1eSMichal Miroslaw 91071578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL); 91171578a1eSMichal Miroslaw if (err) 91271578a1eSMichal Miroslaw goto free_card; 91371578a1eSMichal Miroslaw 914d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */ 915d6d50a15SArindam Nath if (rocr & SD_ROCR_S18A) { 916d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card); 917d6d50a15SArindam Nath if (err) 918d6d50a15SArindam Nath goto free_card; 9193a303511SArindam Nath 9203a303511SArindam Nath /* Card is an ultra-high-speed card */ 9213a303511SArindam Nath mmc_sd_card_set_uhs(card); 922d6d50a15SArindam Nath } else { 92371578a1eSMichal Miroslaw /* 92471578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported) 92571578a1eSMichal Miroslaw */ 92671578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card); 92771578a1eSMichal Miroslaw if (err > 0) 92871578a1eSMichal Miroslaw mmc_sd_go_highspeed(card); 92971578a1eSMichal Miroslaw else if (err) 93071578a1eSMichal Miroslaw goto free_card; 93171578a1eSMichal Miroslaw 93271578a1eSMichal Miroslaw /* 93371578a1eSMichal Miroslaw * Set bus speed. 93471578a1eSMichal Miroslaw */ 93571578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card)); 9366abaa0c9SPierre Ossman 9376abaa0c9SPierre Ossman /* 9386abaa0c9SPierre Ossman * Switch to wider bus (if supported). 9396abaa0c9SPierre Ossman */ 94071651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) && 9416abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { 9426abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); 94317b0429dSPierre Ossman if (err) 9446abaa0c9SPierre Ossman goto free_card; 9456abaa0c9SPierre Ossman 9466abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4); 9476abaa0c9SPierre Ossman } 948d6d50a15SArindam Nath } 9496abaa0c9SPierre Ossman 9506abaa0c9SPierre Ossman host->card = card; 95117b0429dSPierre Ossman return 0; 9526abaa0c9SPierre Ossman 9536abaa0c9SPierre Ossman free_card: 9546abaa0c9SPierre Ossman if (!oldcard) 9556abaa0c9SPierre Ossman mmc_remove_card(card); 9566abaa0c9SPierre Ossman 957adf66a0dSPierre Ossman return err; 9586abaa0c9SPierre Ossman } 9596abaa0c9SPierre Ossman 9606abaa0c9SPierre Ossman /* 9617ea239d9SPierre Ossman * Host is being removed. Free up the current card. 9627ea239d9SPierre Ossman */ 9637ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host) 9647ea239d9SPierre Ossman { 9657ea239d9SPierre Ossman BUG_ON(!host); 9667ea239d9SPierre Ossman BUG_ON(!host->card); 9677ea239d9SPierre Ossman 9687ea239d9SPierre Ossman mmc_remove_card(host->card); 9697ea239d9SPierre Ossman host->card = NULL; 9707ea239d9SPierre Ossman } 9717ea239d9SPierre Ossman 9727ea239d9SPierre Ossman /* 9737ea239d9SPierre Ossman * Card detection callback from host. 9747ea239d9SPierre Ossman */ 9757ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host) 9767ea239d9SPierre Ossman { 9777ea239d9SPierre Ossman int err; 9787ea239d9SPierre Ossman 9797ea239d9SPierre Ossman BUG_ON(!host); 9807ea239d9SPierre Ossman BUG_ON(!host->card); 9817ea239d9SPierre Ossman 9827ea239d9SPierre Ossman mmc_claim_host(host); 9837ea239d9SPierre Ossman 9847ea239d9SPierre Ossman /* 9857ea239d9SPierre Ossman * Just check if our card has been removed. 9867ea239d9SPierre Ossman */ 9877ea239d9SPierre Ossman err = mmc_send_status(host->card, NULL); 9887ea239d9SPierre Ossman 9897ea239d9SPierre Ossman mmc_release_host(host); 9907ea239d9SPierre Ossman 99117b0429dSPierre Ossman if (err) { 9924101c16aSPierre Ossman mmc_sd_remove(host); 9937ea239d9SPierre Ossman 9947ea239d9SPierre Ossman mmc_claim_host(host); 9957ea239d9SPierre Ossman mmc_detach_bus(host); 9967ea239d9SPierre Ossman mmc_release_host(host); 9977ea239d9SPierre Ossman } 9987ea239d9SPierre Ossman } 9997ea239d9SPierre Ossman 10006abaa0c9SPierre Ossman /* 10016abaa0c9SPierre Ossman * Suspend callback from host. 10026abaa0c9SPierre Ossman */ 100395cdfb72SNicolas Pitre static int mmc_sd_suspend(struct mmc_host *host) 10046abaa0c9SPierre Ossman { 10056abaa0c9SPierre Ossman BUG_ON(!host); 10066abaa0c9SPierre Ossman BUG_ON(!host->card); 10076abaa0c9SPierre Ossman 10086abaa0c9SPierre Ossman mmc_claim_host(host); 1009af517150SDavid Brownell if (!mmc_host_is_spi(host)) 10106abaa0c9SPierre Ossman mmc_deselect_cards(host); 10116abaa0c9SPierre Ossman host->card->state &= ~MMC_STATE_HIGHSPEED; 10126abaa0c9SPierre Ossman mmc_release_host(host); 101395cdfb72SNicolas Pitre 101495cdfb72SNicolas Pitre return 0; 10156abaa0c9SPierre Ossman } 10166abaa0c9SPierre Ossman 10176abaa0c9SPierre Ossman /* 10186abaa0c9SPierre Ossman * Resume callback from host. 10196abaa0c9SPierre Ossman * 10206abaa0c9SPierre Ossman * This function tries to determine if the same card is still present 10216abaa0c9SPierre Ossman * and, if so, restore all state to it. 10226abaa0c9SPierre Ossman */ 102395cdfb72SNicolas Pitre static int mmc_sd_resume(struct mmc_host *host) 10246abaa0c9SPierre Ossman { 10256abaa0c9SPierre Ossman int err; 10266abaa0c9SPierre Ossman 10276abaa0c9SPierre Ossman BUG_ON(!host); 10286abaa0c9SPierre Ossman BUG_ON(!host->card); 10296abaa0c9SPierre Ossman 10306abaa0c9SPierre Ossman mmc_claim_host(host); 10316abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, host->card); 10322986d0bfSPierre Ossman mmc_release_host(host); 10332986d0bfSPierre Ossman 103495cdfb72SNicolas Pitre return err; 10356abaa0c9SPierre Ossman } 10366abaa0c9SPierre Ossman 103712ae637fSOhad Ben-Cohen static int mmc_sd_power_restore(struct mmc_host *host) 1038eae1aeeeSAdrian Hunter { 103912ae637fSOhad Ben-Cohen int ret; 104012ae637fSOhad Ben-Cohen 1041eae1aeeeSAdrian Hunter host->card->state &= ~MMC_STATE_HIGHSPEED; 1042eae1aeeeSAdrian Hunter mmc_claim_host(host); 104312ae637fSOhad Ben-Cohen ret = mmc_sd_init_card(host, host->ocr, host->card); 1044eae1aeeeSAdrian Hunter mmc_release_host(host); 104512ae637fSOhad Ben-Cohen 104612ae637fSOhad Ben-Cohen return ret; 1047eae1aeeeSAdrian Hunter } 1048eae1aeeeSAdrian Hunter 10499feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = { 10509feae246SAdrian Hunter .remove = mmc_sd_remove, 10519feae246SAdrian Hunter .detect = mmc_sd_detect, 10529feae246SAdrian Hunter .suspend = NULL, 10539feae246SAdrian Hunter .resume = NULL, 1054eae1aeeeSAdrian Hunter .power_restore = mmc_sd_power_restore, 10559feae246SAdrian Hunter }; 10569feae246SAdrian Hunter 10579feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops_unsafe = { 10589feae246SAdrian Hunter .remove = mmc_sd_remove, 10599feae246SAdrian Hunter .detect = mmc_sd_detect, 10609feae246SAdrian Hunter .suspend = mmc_sd_suspend, 10619feae246SAdrian Hunter .resume = mmc_sd_resume, 1062eae1aeeeSAdrian Hunter .power_restore = mmc_sd_power_restore, 10639feae246SAdrian Hunter }; 10649feae246SAdrian Hunter 10659feae246SAdrian Hunter static void mmc_sd_attach_bus_ops(struct mmc_host *host) 10669feae246SAdrian Hunter { 10679feae246SAdrian Hunter const struct mmc_bus_ops *bus_ops; 10689feae246SAdrian Hunter 106971d7d3d1SMatt Fleming if (!mmc_card_is_removable(host)) 10709feae246SAdrian Hunter bus_ops = &mmc_sd_ops_unsafe; 10719feae246SAdrian Hunter else 10729feae246SAdrian Hunter bus_ops = &mmc_sd_ops; 10739feae246SAdrian Hunter mmc_attach_bus(host, bus_ops); 10749feae246SAdrian Hunter } 10759feae246SAdrian Hunter 10767ea239d9SPierre Ossman /* 10777ea239d9SPierre Ossman * Starting point for SD card init. 10787ea239d9SPierre Ossman */ 1079807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host) 10807ea239d9SPierre Ossman { 10817ea239d9SPierre Ossman int err; 1082807e8e40SAndy Ross u32 ocr; 10837ea239d9SPierre Ossman 10847ea239d9SPierre Ossman BUG_ON(!host); 1085d84075c8SPierre Ossman WARN_ON(!host->claimed); 10867ea239d9SPierre Ossman 1087f2119df6SArindam Nath /* Make sure we are at 3.3V signalling voltage */ 1088f2119df6SArindam Nath err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); 1089f2119df6SArindam Nath if (err) 1090f2119df6SArindam Nath return err; 1091f2119df6SArindam Nath 1092807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr); 1093807e8e40SAndy Ross if (err) 1094807e8e40SAndy Ross return err; 1095807e8e40SAndy Ross 10969feae246SAdrian Hunter mmc_sd_attach_bus_ops(host); 10978f230f45STakashi Iwai if (host->ocr_avail_sd) 10988f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd; 10997ea239d9SPierre Ossman 110055556da0SPhilip Langdale /* 1101af517150SDavid Brownell * We need to get OCR a different way for SPI. 1102af517150SDavid Brownell */ 1103af517150SDavid Brownell if (mmc_host_is_spi(host)) { 1104af517150SDavid Brownell mmc_go_idle(host); 1105af517150SDavid Brownell 1106af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr); 1107af517150SDavid Brownell if (err) 1108af517150SDavid Brownell goto err; 1109af517150SDavid Brownell } 1110af517150SDavid Brownell 1111af517150SDavid Brownell /* 111255556da0SPhilip Langdale * Sanity check the voltages that the card claims to 111355556da0SPhilip Langdale * support. 111455556da0SPhilip Langdale */ 111555556da0SPhilip Langdale if (ocr & 0x7F) { 111655556da0SPhilip Langdale printk(KERN_WARNING "%s: card claims to support voltages " 111755556da0SPhilip Langdale "below the defined range. These will be ignored.\n", 111855556da0SPhilip Langdale mmc_hostname(host)); 111955556da0SPhilip Langdale ocr &= ~0x7F; 112055556da0SPhilip Langdale } 112155556da0SPhilip Langdale 11228f230f45STakashi Iwai if ((ocr & MMC_VDD_165_195) && 11238f230f45STakashi Iwai !(host->ocr_avail_sd & MMC_VDD_165_195)) { 112455556da0SPhilip Langdale printk(KERN_WARNING "%s: SD card claims to support the " 112555556da0SPhilip Langdale "incompletely defined 'low voltage range'. This " 112655556da0SPhilip Langdale "will be ignored.\n", mmc_hostname(host)); 112755556da0SPhilip Langdale ocr &= ~MMC_VDD_165_195; 112855556da0SPhilip Langdale } 112955556da0SPhilip Langdale 11307ea239d9SPierre Ossman host->ocr = mmc_select_voltage(host, ocr); 11317ea239d9SPierre Ossman 11327ea239d9SPierre Ossman /* 11337ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)? 11347ea239d9SPierre Ossman */ 1135109b5bedSPierre Ossman if (!host->ocr) { 1136109b5bedSPierre Ossman err = -EINVAL; 11377ea239d9SPierre Ossman goto err; 1138109b5bedSPierre Ossman } 11397ea239d9SPierre Ossman 11407ea239d9SPierre Ossman /* 11416abaa0c9SPierre Ossman * Detect and init the card. 11427ea239d9SPierre Ossman */ 11436abaa0c9SPierre Ossman err = mmc_sd_init_card(host, host->ocr, NULL); 114417b0429dSPierre Ossman if (err) 11457ea239d9SPierre Ossman goto err; 11467ea239d9SPierre Ossman 11477ea239d9SPierre Ossman mmc_release_host(host); 11484101c16aSPierre Ossman err = mmc_add_card(host->card); 1149807e8e40SAndy Ross mmc_claim_host(host); 11507ea239d9SPierre Ossman if (err) 11512986d0bfSPierre Ossman goto remove_card; 11527ea239d9SPierre Ossman 11537ea239d9SPierre Ossman return 0; 11547ea239d9SPierre Ossman 11552986d0bfSPierre Ossman remove_card: 1156807e8e40SAndy Ross mmc_release_host(host); 11576abaa0c9SPierre Ossman mmc_remove_card(host->card); 11587ea239d9SPierre Ossman host->card = NULL; 11592986d0bfSPierre Ossman mmc_claim_host(host); 11607ea239d9SPierre Ossman err: 11617ea239d9SPierre Ossman mmc_detach_bus(host); 11627ea239d9SPierre Ossman 1163109b5bedSPierre Ossman printk(KERN_ERR "%s: error %d whilst initialising SD card\n", 1164109b5bedSPierre Ossman mmc_hostname(host), err); 1165109b5bedSPierre Ossman 1166adf66a0dSPierre Ossman return err; 11677ea239d9SPierre Ossman } 11687ea239d9SPierre Ossman 1169