2 * linux/drivers/mmc/core/mmc.c
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/err.h>
14 #include <linux/slab.h>
15 #include <linux/stat.h>
17 #include <linux/mmc/host.h>
18 #include <linux/mmc/card.h>
19 #include <linux/mmc/mmc.h>
26 static const unsigned int tran_exp[] = {
27 10000, 100000, 1000000, 10000000,
31 static const unsigned char tran_mant[] = {
32 0, 10, 12, 13, 15, 20, 25, 30,
33 35, 40, 45, 50, 55, 60, 70, 80,
36 static const unsigned int tacc_exp[] = {
37 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
40 static const unsigned int tacc_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
45 #define UNSTUFF_BITS(resp,start,size) \
47 const int __size = size; \
48 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
49 const int __off = 3 - ((start) / 32); \
50 const int __shft = (start) & 31; \
53 __res = resp[__off] >> __shft; \
54 if (__size + __shft > 32) \
55 __res |= resp[__off-1] << ((32 - __shft) % 32); \
60 * Given the decoded CSD structure, decode the raw CID to our CID structure.
62 static int mmc_decode_cid(struct mmc_card *card)
64 u32 *resp = card->raw_cid;
67 * The selection of the format here is based upon published
68 * specs from sandisk and from what people have reported.
70 switch (card->csd.mmca_vsn) {
71 case 0: /* MMC v1.0 - v1.2 */
72 case 1: /* MMC v1.4 */
73 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
74 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
75 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
76 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
77 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
78 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
79 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
80 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
84 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
85 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
88 case 2: /* MMC v2.0 - v2.2 */
89 case 3: /* MMC v3.1 - v3.3 */
91 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
92 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
93 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
94 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
95 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
96 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
97 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
98 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
105 pr_err("%s: card has unknown MMCA version %d\n",
106 mmc_hostname(card->host), card->csd.mmca_vsn);
113 static void mmc_set_erase_size(struct mmc_card *card)
115 if (card->ext_csd.erase_group_def & 1)
116 card->erase_size = card->ext_csd.hc_erase_size;
118 card->erase_size = card->csd.erase_size;
120 mmc_init_erase(card);
124 * Given a 128-bit response, decode to our card CSD structure.
126 static int mmc_decode_csd(struct mmc_card *card)
128 struct mmc_csd *csd = &card->csd;
129 unsigned int e, m, a, b;
130 u32 *resp = card->raw_csd;
133 * We only understand CSD structure v1.1 and v1.2.
134 * v1.2 has extra information in bits 15, 11 and 10.
135 * We also support eMMC v4.4 & v4.41.
137 csd->structure = UNSTUFF_BITS(resp, 126, 2);
138 if (csd->structure == 0) {
139 pr_err("%s: unrecognised CSD structure version %d\n",
140 mmc_hostname(card->host), csd->structure);
144 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
145 m = UNSTUFF_BITS(resp, 115, 4);
146 e = UNSTUFF_BITS(resp, 112, 3);
147 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
148 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
150 m = UNSTUFF_BITS(resp, 99, 4);
151 e = UNSTUFF_BITS(resp, 96, 3);
152 csd->max_dtr = tran_exp[e] * tran_mant[m];
153 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
155 e = UNSTUFF_BITS(resp, 47, 3);
156 m = UNSTUFF_BITS(resp, 62, 12);
157 csd->capacity = (1 + m) << (e + 2);
159 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
160 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
161 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
162 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
163 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
164 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
165 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
167 if (csd->write_blkbits >= 9) {
168 a = UNSTUFF_BITS(resp, 42, 5);
169 b = UNSTUFF_BITS(resp, 37, 5);
170 csd->erase_size = (a + 1) * (b + 1);
171 csd->erase_size <<= csd->write_blkbits - 9;
180 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
186 BUG_ON(!new_ext_csd);
190 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
194 * As the ext_csd is so large and mostly unused, we don't store the
195 * raw block in mmc_card.
197 ext_csd = kmalloc(512, GFP_KERNEL);
199 pr_err("%s: could not allocate a buffer to "
200 "receive the ext_csd.\n", mmc_hostname(card->host));
204 err = mmc_send_ext_csd(card, ext_csd);
209 /* If the host or the card can't do the switch,
210 * fail more gracefully. */
217 * High capacity cards should have this "magic" size
218 * stored in their CSD.
220 if (card->csd.capacity == (4096 * 512)) {
221 pr_err("%s: unable to read EXT_CSD "
222 "on a possible high capacity card. "
223 "Card will be ignored.\n",
224 mmc_hostname(card->host));
226 pr_warning("%s: unable to read "
227 "EXT_CSD, performance might "
229 mmc_hostname(card->host));
233 *new_ext_csd = ext_csd;
238 static void mmc_select_card_type(struct mmc_card *card)
240 struct mmc_host *host = card->host;
241 u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
242 unsigned int caps = host->caps, caps2 = host->caps2;
243 unsigned int hs_max_dtr = 0;
245 if (card_type & EXT_CSD_CARD_TYPE_26)
246 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
248 if (caps & MMC_CAP_MMC_HIGHSPEED &&
249 card_type & EXT_CSD_CARD_TYPE_52)
250 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
252 if ((caps & MMC_CAP_1_8V_DDR &&
253 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
254 (caps & MMC_CAP_1_2V_DDR &&
255 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
256 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
258 if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
259 card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
260 (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
261 card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
262 hs_max_dtr = MMC_HS200_MAX_DTR;
264 card->ext_csd.hs_max_dtr = hs_max_dtr;
265 card->ext_csd.card_type = card_type;
269 * Decode extended CSD.
271 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
274 unsigned int part_size;
275 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
282 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
283 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
284 if (card->csd.structure == 3) {
285 if (card->ext_csd.raw_ext_csd_structure > 2) {
286 pr_err("%s: unrecognised EXT_CSD structure "
287 "version %d\n", mmc_hostname(card->host),
288 card->ext_csd.raw_ext_csd_structure);
294 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
295 if (card->ext_csd.rev > 6) {
296 pr_err("%s: unrecognised EXT_CSD revision %d\n",
297 mmc_hostname(card->host), card->ext_csd.rev);
302 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
303 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
304 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
305 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
306 if (card->ext_csd.rev >= 2) {
307 card->ext_csd.sectors =
308 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
309 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
310 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
311 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
313 /* Cards with density > 2GiB are sector addressed */
314 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
315 mmc_card_set_blockaddr(card);
318 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
319 mmc_select_card_type(card);
321 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
322 card->ext_csd.raw_erase_timeout_mult =
323 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
324 card->ext_csd.raw_hc_erase_grp_size =
325 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
326 if (card->ext_csd.rev >= 3) {
327 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
328 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
330 /* EXT_CSD value is in units of 10ms, but we store in ms */
331 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
333 /* Sleep / awake timeout in 100ns units */
334 if (sa_shift > 0 && sa_shift <= 0x17)
335 card->ext_csd.sa_timeout =
336 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
337 card->ext_csd.erase_group_def =
338 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
339 card->ext_csd.hc_erase_timeout = 300 *
340 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
341 card->ext_csd.hc_erase_size =
342 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
344 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
347 * There are two boot regions of equal size, defined in
350 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
351 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
352 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
353 mmc_part_add(card, part_size,
354 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
356 MMC_BLK_DATA_AREA_BOOT);
361 card->ext_csd.raw_hc_erase_gap_size =
362 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
363 card->ext_csd.raw_sec_trim_mult =
364 ext_csd[EXT_CSD_SEC_TRIM_MULT];
365 card->ext_csd.raw_sec_erase_mult =
366 ext_csd[EXT_CSD_SEC_ERASE_MULT];
367 card->ext_csd.raw_sec_feature_support =
368 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
369 card->ext_csd.raw_trim_mult =
370 ext_csd[EXT_CSD_TRIM_MULT];
371 if (card->ext_csd.rev >= 4) {
373 * Enhanced area feature support -- check whether the eMMC
374 * card has the Enhanced area enabled. If so, export enhanced
375 * area offset and size to user by adding sysfs interface.
377 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
378 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
379 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
381 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
383 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
385 card->ext_csd.enhanced_area_en = 1;
387 * calculate the enhanced data area offset, in bytes
389 card->ext_csd.enhanced_area_offset =
390 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
391 (ext_csd[137] << 8) + ext_csd[136];
392 if (mmc_card_blockaddr(card))
393 card->ext_csd.enhanced_area_offset <<= 9;
395 * calculate the enhanced data area size, in kilobytes
397 card->ext_csd.enhanced_area_size =
398 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
400 card->ext_csd.enhanced_area_size *=
401 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
402 card->ext_csd.enhanced_area_size <<= 9;
405 * If the enhanced area is not enabled, disable these
408 card->ext_csd.enhanced_area_offset = -EINVAL;
409 card->ext_csd.enhanced_area_size = -EINVAL;
413 * General purpose partition feature support --
414 * If ext_csd has the size of general purpose partitions,
415 * set size, part_cfg, partition name in mmc_part.
417 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
418 EXT_CSD_PART_SUPPORT_PART_EN) {
419 if (card->ext_csd.enhanced_area_en != 1) {
421 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
423 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
425 card->ext_csd.enhanced_area_en = 1;
428 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
429 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
430 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
431 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
434 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
436 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
438 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
439 part_size *= (size_t)(hc_erase_grp_sz *
441 mmc_part_add(card, part_size << 19,
442 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
444 MMC_BLK_DATA_AREA_GP);
447 card->ext_csd.sec_trim_mult =
448 ext_csd[EXT_CSD_SEC_TRIM_MULT];
449 card->ext_csd.sec_erase_mult =
450 ext_csd[EXT_CSD_SEC_ERASE_MULT];
451 card->ext_csd.sec_feature_support =
452 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
453 card->ext_csd.trim_timeout = 300 *
454 ext_csd[EXT_CSD_TRIM_MULT];
457 * Note that the call to mmc_part_add above defaults to read
458 * only. If this default assumption is changed, the call must
459 * take into account the value of boot_locked below.
461 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
462 card->ext_csd.boot_ro_lockable = true;
465 if (card->ext_csd.rev >= 5) {
466 /* check whether the eMMC card supports HPI */
467 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
468 card->ext_csd.hpi = 1;
469 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
470 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
472 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
474 * Indicate the maximum timeout to close
475 * a command interrupted by HPI
477 card->ext_csd.out_of_int_time =
478 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
481 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
482 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
485 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
486 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
487 card->erased_byte = 0xFF;
489 card->erased_byte = 0x0;
491 /* eMMC v4.5 or later */
492 if (card->ext_csd.rev >= 6) {
493 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
495 card->ext_csd.generic_cmd6_time = 10 *
496 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
497 card->ext_csd.power_off_longtime = 10 *
498 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
500 card->ext_csd.cache_size =
501 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
502 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
503 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
504 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
506 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
507 card->ext_csd.data_sector_size = 4096;
509 card->ext_csd.data_sector_size = 512;
511 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
512 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
513 card->ext_csd.data_tag_unit_size =
514 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
515 (card->ext_csd.data_sector_size);
517 card->ext_csd.data_tag_unit_size = 0;
520 card->ext_csd.data_sector_size = 512;
527 static inline void mmc_free_ext_csd(u8 *ext_csd)
533 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
538 if (bus_width == MMC_BUS_WIDTH_1)
541 err = mmc_get_ext_csd(card, &bw_ext_csd);
543 if (err || bw_ext_csd == NULL) {
548 /* only compare read only fields */
549 err = !((card->ext_csd.raw_partition_support ==
550 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
551 (card->ext_csd.raw_erased_mem_count ==
552 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
553 (card->ext_csd.rev ==
554 bw_ext_csd[EXT_CSD_REV]) &&
555 (card->ext_csd.raw_ext_csd_structure ==
556 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
557 (card->ext_csd.raw_card_type ==
558 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
559 (card->ext_csd.raw_s_a_timeout ==
560 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
561 (card->ext_csd.raw_hc_erase_gap_size ==
562 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
563 (card->ext_csd.raw_erase_timeout_mult ==
564 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
565 (card->ext_csd.raw_hc_erase_grp_size ==
566 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
567 (card->ext_csd.raw_sec_trim_mult ==
568 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
569 (card->ext_csd.raw_sec_erase_mult ==
570 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
571 (card->ext_csd.raw_sec_feature_support ==
572 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
573 (card->ext_csd.raw_trim_mult ==
574 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
575 (card->ext_csd.raw_sectors[0] ==
576 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
577 (card->ext_csd.raw_sectors[1] ==
578 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
579 (card->ext_csd.raw_sectors[2] ==
580 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
581 (card->ext_csd.raw_sectors[3] ==
582 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
587 mmc_free_ext_csd(bw_ext_csd);
591 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
592 card->raw_cid[2], card->raw_cid[3]);
593 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
594 card->raw_csd[2], card->raw_csd[3]);
595 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
596 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
597 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
598 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
599 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
600 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
601 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
602 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
603 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
604 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
605 card->ext_csd.enhanced_area_offset);
606 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
608 static struct attribute *mmc_std_attrs[] = {
612 &dev_attr_erase_size.attr,
613 &dev_attr_preferred_erase_size.attr,
614 &dev_attr_fwrev.attr,
615 &dev_attr_hwrev.attr,
616 &dev_attr_manfid.attr,
618 &dev_attr_oemid.attr,
619 &dev_attr_serial.attr,
620 &dev_attr_enhanced_area_offset.attr,
621 &dev_attr_enhanced_area_size.attr,
625 static struct attribute_group mmc_std_attr_group = {
626 .attrs = mmc_std_attrs,
629 static const struct attribute_group *mmc_attr_groups[] = {
634 static struct device_type mmc_type = {
635 .groups = mmc_attr_groups,
639 * Select the PowerClass for the current bus width
640 * If power class is defined for 4/8 bit bus in the
641 * extended CSD register, select it by executing the
642 * mmc_switch command.
644 static int mmc_select_powerclass(struct mmc_card *card,
645 unsigned int bus_width, u8 *ext_csd)
648 unsigned int pwrclass_val;
649 unsigned int index = 0;
650 struct mmc_host *host;
660 /* Power class selection is supported for versions >= 4.0 */
661 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
664 /* Power class values are defined only for 4/8 bit bus */
665 if (bus_width == EXT_CSD_BUS_WIDTH_1)
668 switch (1 << host->ios.vdd) {
669 case MMC_VDD_165_195:
670 if (host->ios.clock <= 26000000)
671 index = EXT_CSD_PWR_CL_26_195;
672 else if (host->ios.clock <= 52000000)
673 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
674 EXT_CSD_PWR_CL_52_195 :
675 EXT_CSD_PWR_CL_DDR_52_195;
676 else if (host->ios.clock <= 200000000)
677 index = EXT_CSD_PWR_CL_200_195;
688 if (host->ios.clock <= 26000000)
689 index = EXT_CSD_PWR_CL_26_360;
690 else if (host->ios.clock <= 52000000)
691 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
692 EXT_CSD_PWR_CL_52_360 :
693 EXT_CSD_PWR_CL_DDR_52_360;
694 else if (host->ios.clock <= 200000000)
695 index = EXT_CSD_PWR_CL_200_360;
698 pr_warning("%s: Voltage range not supported "
699 "for power class.\n", mmc_hostname(host));
703 pwrclass_val = ext_csd[index];
705 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
706 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
707 EXT_CSD_PWR_CL_8BIT_SHIFT;
709 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
710 EXT_CSD_PWR_CL_4BIT_SHIFT;
712 /* If the power class is different from the default value */
713 if (pwrclass_val > 0) {
714 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
717 card->ext_csd.generic_cmd6_time);
724 * Selects the desired buswidth and switch to the HS200 mode
725 * if bus width set without error
727 static int mmc_select_hs200(struct mmc_card *card)
729 int idx, err = -EINVAL;
730 struct mmc_host *host;
731 static unsigned ext_csd_bits[] = {
735 static unsigned bus_widths[] = {
744 if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
745 host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
746 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0);
748 if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
749 host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
750 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 0);
752 /* If fails try again during next card power cycle */
756 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
759 * Unlike SD, MMC cards dont have a configuration register to notify
760 * supported bus width. So bus test command should be run to identify
761 * the supported bus width or compare the ext csd values of current
762 * bus width and ext csd values of 1 bit mode read earlier.
764 for (; idx >= 0; idx--) {
767 * Host is capable of 8bit transfer, then switch
768 * the device to work in 8bit transfer mode. If the
769 * mmc switch command returns error then switch to
770 * 4bit transfer mode. On success set the corresponding
771 * bus width on the host.
773 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
776 card->ext_csd.generic_cmd6_time);
780 mmc_set_bus_width(card->host, bus_widths[idx]);
782 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
783 err = mmc_compare_ext_csds(card, bus_widths[idx]);
785 err = mmc_bus_test(card, bus_widths[idx]);
790 /* switch to HS200 mode if bus width set successfully */
792 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
793 EXT_CSD_HS_TIMING, 2, 0);
799 * Handle the detection and initialisation of a card.
801 * In the case of a resume, "oldcard" will contain the card
802 * we're trying to reinitialise.
804 static int mmc_init_card(struct mmc_host *host, u32 ocr,
805 struct mmc_card *oldcard)
807 struct mmc_card *card;
810 unsigned int max_dtr;
815 WARN_ON(!host->claimed);
817 /* Set correct bus mode for MMC before attempting init */
818 if (!mmc_host_is_spi(host))
819 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
822 * Since we're changing the OCR value, we seem to
823 * need to tell some cards to go back to the idle
824 * state. We wait 1ms to give cards time to
826 * mmc_go_idle is needed for eMMC that are asleep
830 /* The extra bit indicates that we support high capacity */
831 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
836 * For SPI, enable CRC as appropriate.
838 if (mmc_host_is_spi(host)) {
839 err = mmc_spi_set_crc(host, use_spi_crc);
845 * Fetch CID from card.
847 if (mmc_host_is_spi(host))
848 err = mmc_send_cid(host, cid);
850 err = mmc_all_send_cid(host, cid);
855 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
863 * Allocate card structure.
865 card = mmc_alloc_card(host, &mmc_type);
871 card->type = MMC_TYPE_MMC;
873 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
877 * For native busses: set card RCA and quit open drain mode.
879 if (!mmc_host_is_spi(host)) {
880 err = mmc_set_relative_addr(card);
884 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
889 * Fetch CSD from card.
891 err = mmc_send_csd(card, card->raw_csd);
895 err = mmc_decode_csd(card);
898 err = mmc_decode_cid(card);
904 * Select card, as all following commands rely on that.
906 if (!mmc_host_is_spi(host)) {
907 err = mmc_select_card(card);
914 * Fetch and process extended CSD.
917 err = mmc_get_ext_csd(card, &ext_csd);
920 err = mmc_read_ext_csd(card, ext_csd);
924 /* If doing byte addressing, check if required to do sector
925 * addressing. Handle the case of <2GB cards needing sector
926 * addressing. See section 8.1 JEDEC Standard JED84-A441;
927 * ocr register has bit 30 set for sector addressing.
929 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
930 mmc_card_set_blockaddr(card);
932 /* Erase size depends on CSD and Extended CSD */
933 mmc_set_erase_size(card);
937 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
938 * bit. This bit will be lost every time after a reset or power off.
940 if (card->ext_csd.enhanced_area_en ||
941 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
942 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
943 EXT_CSD_ERASE_GROUP_DEF, 1,
944 card->ext_csd.generic_cmd6_time);
946 if (err && err != -EBADMSG)
952 * Just disable enhanced area off & sz
953 * will try to enable ERASE_GROUP_DEF
954 * during next time reinit
956 card->ext_csd.enhanced_area_offset = -EINVAL;
957 card->ext_csd.enhanced_area_size = -EINVAL;
959 card->ext_csd.erase_group_def = 1;
961 * enable ERASE_GRP_DEF successfully.
962 * This will affect the erase size, so
963 * here need to reset erase size
965 mmc_set_erase_size(card);
970 * Ensure eMMC user default partition is enabled
972 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
973 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
974 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
975 card->ext_csd.part_config,
976 card->ext_csd.part_time);
977 if (err && err != -EBADMSG)
982 * If the host supports the power_off_notify capability then
983 * set the notification byte in the ext_csd register of device
985 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
986 (card->ext_csd.rev >= 6)) {
987 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
988 EXT_CSD_POWER_OFF_NOTIFICATION,
990 card->ext_csd.generic_cmd6_time);
991 if (err && err != -EBADMSG)
995 * The err can be -EBADMSG or 0,
996 * so check for success and update the flag
999 card->poweroff_notify_state = MMC_POWERED_ON;
1003 * Activate high speed (if supported)
1005 if (card->ext_csd.hs_max_dtr != 0) {
1007 if (card->ext_csd.hs_max_dtr > 52000000 &&
1008 host->caps2 & MMC_CAP2_HS200)
1009 err = mmc_select_hs200(card);
1010 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1011 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1012 EXT_CSD_HS_TIMING, 1,
1013 card->ext_csd.generic_cmd6_time);
1015 if (err && err != -EBADMSG)
1019 pr_warning("%s: switch to highspeed failed\n",
1020 mmc_hostname(card->host));
1023 if (card->ext_csd.hs_max_dtr > 52000000 &&
1024 host->caps2 & MMC_CAP2_HS200) {
1025 mmc_card_set_hs200(card);
1026 mmc_set_timing(card->host,
1027 MMC_TIMING_MMC_HS200);
1029 mmc_card_set_highspeed(card);
1030 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1036 * Compute bus speed.
1038 max_dtr = (unsigned int)-1;
1040 if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1041 if (max_dtr > card->ext_csd.hs_max_dtr)
1042 max_dtr = card->ext_csd.hs_max_dtr;
1043 } else if (max_dtr > card->csd.max_dtr) {
1044 max_dtr = card->csd.max_dtr;
1047 mmc_set_clock(host, max_dtr);
1050 * Indicate DDR mode (if supported).
1052 if (mmc_card_highspeed(card)) {
1053 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1054 && ((host->caps & (MMC_CAP_1_8V_DDR |
1056 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
1057 ddr = MMC_1_8V_DDR_MODE;
1058 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1059 && ((host->caps & (MMC_CAP_1_2V_DDR |
1061 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
1062 ddr = MMC_1_2V_DDR_MODE;
1066 * Indicate HS200 SDR mode (if supported).
1068 if (mmc_card_hs200(card)) {
1070 u32 bus_width = card->host->ios.bus_width;
1073 * For devices supporting HS200 mode, the bus width has
1074 * to be set before executing the tuning function. If
1075 * set before tuning, then device will respond with CRC
1076 * errors for responses on CMD line. So for HS200 the
1078 * 1. set bus width 4bit / 8 bit (1 bit not supported)
1079 * 2. switch to HS200 mode
1080 * 3. set the clock to > 52Mhz <=200MHz and
1081 * 4. execute tuning for HS200
1083 if ((host->caps2 & MMC_CAP2_HS200) &&
1084 card->host->ops->execute_tuning) {
1085 mmc_host_clk_hold(card->host);
1086 err = card->host->ops->execute_tuning(card->host,
1087 MMC_SEND_TUNING_BLOCK_HS200);
1088 mmc_host_clk_release(card->host);
1091 pr_warning("%s: tuning execution failed\n",
1092 mmc_hostname(card->host));
1096 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1097 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1098 err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
1100 pr_warning("%s: power class selection to bus width %d"
1101 " failed\n", mmc_hostname(card->host),
1106 * Activate wide bus and DDR (if supported).
1108 if (!mmc_card_hs200(card) &&
1109 (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1110 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1111 static unsigned ext_csd_bits[][2] = {
1112 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1113 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1114 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1116 static unsigned bus_widths[] = {
1121 unsigned idx, bus_width = 0;
1123 if (host->caps & MMC_CAP_8_BIT_DATA)
1127 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1128 bus_width = bus_widths[idx];
1129 if (bus_width == MMC_BUS_WIDTH_1)
1130 ddr = 0; /* no DDR for 1-bit width */
1131 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
1134 pr_warning("%s: power class selection to "
1135 "bus width %d failed\n",
1136 mmc_hostname(card->host),
1139 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1141 ext_csd_bits[idx][0],
1142 card->ext_csd.generic_cmd6_time);
1144 mmc_set_bus_width(card->host, bus_width);
1147 * If controller can't handle bus width test,
1148 * compare ext_csd previously read in 1 bit mode
1149 * against ext_csd at new bus width
1151 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1152 err = mmc_compare_ext_csds(card,
1155 err = mmc_bus_test(card, bus_width);
1162 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1165 pr_warning("%s: power class selection to "
1166 "bus width %d ddr %d failed\n",
1167 mmc_hostname(card->host),
1168 1 << bus_width, ddr);
1170 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1172 ext_csd_bits[idx][1],
1173 card->ext_csd.generic_cmd6_time);
1176 pr_warning("%s: switch to bus width %d ddr %d "
1177 "failed\n", mmc_hostname(card->host),
1178 1 << bus_width, ddr);
1182 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1185 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1187 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1188 * in the JEDEC spec for DDR.
1190 * Do not force change in vccq since we are obviously
1191 * working and no change to vccq is needed.
1193 * WARNING: eMMC rules are NOT the same as SD DDR
1195 if (ddr == MMC_1_2V_DDR_MODE) {
1196 err = mmc_set_signal_voltage(host,
1197 MMC_SIGNAL_VOLTAGE_120, 0);
1201 mmc_card_set_ddr_mode(card);
1202 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1203 mmc_set_bus_width(card->host, bus_width);
1208 * Enable HPI feature (if supported)
1210 if (card->ext_csd.hpi) {
1211 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1212 EXT_CSD_HPI_MGMT, 1,
1213 card->ext_csd.generic_cmd6_time);
1214 if (err && err != -EBADMSG)
1217 pr_warning("%s: Enabling HPI failed\n",
1218 mmc_hostname(card->host));
1221 card->ext_csd.hpi_en = 1;
1225 * If cache size is higher than 0, this indicates
1226 * the existence of cache and it can be turned on.
1228 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1229 card->ext_csd.cache_size > 0) {
1230 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1231 EXT_CSD_CACHE_CTRL, 1,
1232 card->ext_csd.generic_cmd6_time);
1233 if (err && err != -EBADMSG)
1237 * Only if no error, cache is turned on successfully.
1240 pr_warning("%s: Cache is supported, "
1241 "but failed to turn on (%d)\n",
1242 mmc_hostname(card->host), err);
1243 card->ext_csd.cache_ctrl = 0;
1246 card->ext_csd.cache_ctrl = 1;
1253 mmc_free_ext_csd(ext_csd);
1258 mmc_remove_card(card);
1260 mmc_free_ext_csd(ext_csd);
1266 * Host is being removed. Free up the current card.
1268 static void mmc_remove(struct mmc_host *host)
1271 BUG_ON(!host->card);
1273 mmc_remove_card(host->card);
1278 * Card detection - card is alive.
1280 static int mmc_alive(struct mmc_host *host)
1282 return mmc_send_status(host->card, NULL);
1286 * Card detection callback from host.
1288 static void mmc_detect(struct mmc_host *host)
1293 BUG_ON(!host->card);
1295 mmc_claim_host(host);
1298 * Just check if our card has been removed.
1300 err = _mmc_detect_card_removed(host);
1302 mmc_release_host(host);
1307 mmc_claim_host(host);
1308 mmc_detach_bus(host);
1309 mmc_power_off(host);
1310 mmc_release_host(host);
1315 * Suspend callback from host.
1317 static int mmc_suspend(struct mmc_host *host)
1322 BUG_ON(!host->card);
1324 mmc_claim_host(host);
1325 if (mmc_card_can_sleep(host)) {
1326 err = mmc_card_sleep(host);
1328 mmc_card_set_sleep(host->card);
1329 } else if (!mmc_host_is_spi(host))
1330 err = mmc_deselect_cards(host);
1331 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1332 mmc_release_host(host);
1338 * Resume callback from host.
1340 * This function tries to determine if the same card is still present
1341 * and, if so, restore all state to it.
1343 static int mmc_resume(struct mmc_host *host)
1348 BUG_ON(!host->card);
1350 mmc_claim_host(host);
1351 if (mmc_card_is_sleep(host->card)) {
1352 err = mmc_card_awake(host);
1353 mmc_card_clr_sleep(host->card);
1355 err = mmc_init_card(host, host->ocr, host->card);
1356 mmc_release_host(host);
1361 static int mmc_power_restore(struct mmc_host *host)
1365 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1366 mmc_card_clr_sleep(host->card);
1367 mmc_claim_host(host);
1368 ret = mmc_init_card(host, host->ocr, host->card);
1369 mmc_release_host(host);
1374 static int mmc_sleep(struct mmc_host *host)
1376 struct mmc_card *card = host->card;
1379 if (card && card->ext_csd.rev >= 3) {
1380 err = mmc_card_sleepawake(host, 1);
1382 pr_debug("%s: Error %d while putting card into sleep",
1383 mmc_hostname(host), err);
1389 static int mmc_awake(struct mmc_host *host)
1391 struct mmc_card *card = host->card;
1394 if (card && card->ext_csd.rev >= 3) {
1395 err = mmc_card_sleepawake(host, 0);
1397 pr_debug("%s: Error %d while awaking sleeping card",
1398 mmc_hostname(host), err);
1404 static const struct mmc_bus_ops mmc_ops = {
1407 .remove = mmc_remove,
1408 .detect = mmc_detect,
1411 .power_restore = mmc_power_restore,
1415 static const struct mmc_bus_ops mmc_ops_unsafe = {
1418 .remove = mmc_remove,
1419 .detect = mmc_detect,
1420 .suspend = mmc_suspend,
1421 .resume = mmc_resume,
1422 .power_restore = mmc_power_restore,
1426 static void mmc_attach_bus_ops(struct mmc_host *host)
1428 const struct mmc_bus_ops *bus_ops;
1430 if (!mmc_card_is_removable(host))
1431 bus_ops = &mmc_ops_unsafe;
1434 mmc_attach_bus(host, bus_ops);
1438 * Starting point for MMC card init.
1440 int mmc_attach_mmc(struct mmc_host *host)
1446 WARN_ON(!host->claimed);
1448 /* Set correct bus mode for MMC before attempting attach */
1449 if (!mmc_host_is_spi(host))
1450 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1452 err = mmc_send_op_cond(host, 0, &ocr);
1456 mmc_attach_bus_ops(host);
1457 if (host->ocr_avail_mmc)
1458 host->ocr_avail = host->ocr_avail_mmc;
1461 * We need to get OCR a different way for SPI.
1463 if (mmc_host_is_spi(host)) {
1464 err = mmc_spi_read_ocr(host, 1, &ocr);
1470 * Sanity check the voltages that the card claims to
1474 pr_warning("%s: card claims to support voltages "
1475 "below the defined range. These will be ignored.\n",
1476 mmc_hostname(host));
1480 host->ocr = mmc_select_voltage(host, ocr);
1483 * Can we support the voltage of the card?
1491 * Detect and init the card.
1493 err = mmc_init_card(host, host->ocr, NULL);
1497 mmc_release_host(host);
1498 err = mmc_add_card(host->card);
1499 mmc_claim_host(host);
1506 mmc_release_host(host);
1507 mmc_remove_card(host->card);
1508 mmc_claim_host(host);
1511 mmc_detach_bus(host);
1513 pr_err("%s: error %d whilst initialising MMC card\n",
1514 mmc_hostname(host), err);