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>
16 #include <linux/pm_runtime.h>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/mmc.h>
27 static const unsigned int tran_exp[] = {
28 10000, 100000, 1000000, 10000000,
32 static const unsigned char tran_mant[] = {
33 0, 10, 12, 13, 15, 20, 25, 30,
34 35, 40, 45, 50, 55, 60, 70, 80,
37 static const unsigned int tacc_exp[] = {
38 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
41 static const unsigned int tacc_mant[] = {
42 0, 10, 12, 13, 15, 20, 25, 30,
43 35, 40, 45, 50, 55, 60, 70, 80,
46 #define UNSTUFF_BITS(resp,start,size) \
48 const int __size = size; \
49 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
50 const int __off = 3 - ((start) / 32); \
51 const int __shft = (start) & 31; \
54 __res = resp[__off] >> __shft; \
55 if (__size + __shft > 32) \
56 __res |= resp[__off-1] << ((32 - __shft) % 32); \
61 * Given the decoded CSD structure, decode the raw CID to our CID structure.
63 static int mmc_decode_cid(struct mmc_card *card)
65 u32 *resp = card->raw_cid;
68 * The selection of the format here is based upon published
69 * specs from sandisk and from what people have reported.
71 switch (card->csd.mmca_vsn) {
72 case 0: /* MMC v1.0 - v1.2 */
73 case 1: /* MMC v1.4 */
74 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
75 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
76 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
77 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
78 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
79 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
80 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
81 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
82 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
83 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
84 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
85 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
86 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
89 case 2: /* MMC v2.0 - v2.2 */
90 case 3: /* MMC v3.1 - v3.3 */
92 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
93 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
94 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
95 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
96 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
97 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
98 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
99 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
100 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
101 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
102 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
103 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
107 pr_err("%s: card has unknown MMCA version %d\n",
108 mmc_hostname(card->host), card->csd.mmca_vsn);
115 static void mmc_set_erase_size(struct mmc_card *card)
117 if (card->ext_csd.erase_group_def & 1)
118 card->erase_size = card->ext_csd.hc_erase_size;
120 card->erase_size = card->csd.erase_size;
122 mmc_init_erase(card);
126 * Given a 128-bit response, decode to our card CSD structure.
128 static int mmc_decode_csd(struct mmc_card *card)
130 struct mmc_csd *csd = &card->csd;
131 unsigned int e, m, a, b;
132 u32 *resp = card->raw_csd;
135 * We only understand CSD structure v1.1 and v1.2.
136 * v1.2 has extra information in bits 15, 11 and 10.
137 * We also support eMMC v4.4 & v4.41.
139 csd->structure = UNSTUFF_BITS(resp, 126, 2);
140 if (csd->structure == 0) {
141 pr_err("%s: unrecognised CSD structure version %d\n",
142 mmc_hostname(card->host), csd->structure);
146 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
147 m = UNSTUFF_BITS(resp, 115, 4);
148 e = UNSTUFF_BITS(resp, 112, 3);
149 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
150 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
152 m = UNSTUFF_BITS(resp, 99, 4);
153 e = UNSTUFF_BITS(resp, 96, 3);
154 csd->max_dtr = tran_exp[e] * tran_mant[m];
155 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
157 e = UNSTUFF_BITS(resp, 47, 3);
158 m = UNSTUFF_BITS(resp, 62, 12);
159 csd->capacity = (1 + m) << (e + 2);
161 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
162 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
163 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
164 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
165 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
166 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
167 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
169 if (csd->write_blkbits >= 9) {
170 a = UNSTUFF_BITS(resp, 42, 5);
171 b = UNSTUFF_BITS(resp, 37, 5);
172 csd->erase_size = (a + 1) * (b + 1);
173 csd->erase_size <<= csd->write_blkbits - 9;
182 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
188 BUG_ON(!new_ext_csd);
192 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
196 * As the ext_csd is so large and mostly unused, we don't store the
197 * raw block in mmc_card.
199 ext_csd = kmalloc(512, GFP_KERNEL);
201 pr_err("%s: could not allocate a buffer to "
202 "receive the ext_csd.\n", mmc_hostname(card->host));
206 err = mmc_send_ext_csd(card, ext_csd);
211 /* If the host or the card can't do the switch,
212 * fail more gracefully. */
219 * High capacity cards should have this "magic" size
220 * stored in their CSD.
222 if (card->csd.capacity == (4096 * 512)) {
223 pr_err("%s: unable to read EXT_CSD "
224 "on a possible high capacity card. "
225 "Card will be ignored.\n",
226 mmc_hostname(card->host));
228 pr_warning("%s: unable to read "
229 "EXT_CSD, performance might "
231 mmc_hostname(card->host));
235 *new_ext_csd = ext_csd;
240 static void mmc_select_card_type(struct mmc_card *card)
242 struct mmc_host *host = card->host;
243 u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
244 u32 caps = host->caps, caps2 = host->caps2;
245 unsigned int hs_max_dtr = 0;
247 if (card_type & EXT_CSD_CARD_TYPE_26)
248 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
250 if (caps & MMC_CAP_MMC_HIGHSPEED &&
251 card_type & EXT_CSD_CARD_TYPE_52)
252 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
254 if ((caps & MMC_CAP_1_8V_DDR &&
255 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
256 (caps & MMC_CAP_1_2V_DDR &&
257 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
258 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
260 if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
261 card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
262 (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
263 card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
264 hs_max_dtr = MMC_HS200_MAX_DTR;
266 card->ext_csd.hs_max_dtr = hs_max_dtr;
267 card->ext_csd.card_type = card_type;
271 * Decode extended CSD.
273 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
276 unsigned int part_size;
277 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
284 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
285 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
286 if (card->csd.structure == 3) {
287 if (card->ext_csd.raw_ext_csd_structure > 2) {
288 pr_err("%s: unrecognised EXT_CSD structure "
289 "version %d\n", mmc_hostname(card->host),
290 card->ext_csd.raw_ext_csd_structure);
297 * The EXT_CSD format is meant to be forward compatible. As long
298 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
299 * are authorized, see JEDEC JESD84-B50 section B.8.
301 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
303 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
304 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
305 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
306 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
307 if (card->ext_csd.rev >= 2) {
308 card->ext_csd.sectors =
309 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
310 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
311 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
312 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
314 /* Cards with density > 2GiB are sector addressed */
315 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
316 mmc_card_set_blockaddr(card);
319 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
320 mmc_select_card_type(card);
322 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
323 card->ext_csd.raw_erase_timeout_mult =
324 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
325 card->ext_csd.raw_hc_erase_grp_size =
326 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
327 if (card->ext_csd.rev >= 3) {
328 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
329 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
331 /* EXT_CSD value is in units of 10ms, but we store in ms */
332 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
334 /* Sleep / awake timeout in 100ns units */
335 if (sa_shift > 0 && sa_shift <= 0x17)
336 card->ext_csd.sa_timeout =
337 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
338 card->ext_csd.erase_group_def =
339 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
340 card->ext_csd.hc_erase_timeout = 300 *
341 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
342 card->ext_csd.hc_erase_size =
343 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
345 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
348 * There are two boot regions of equal size, defined in
351 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
352 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
353 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
354 mmc_part_add(card, part_size,
355 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
357 MMC_BLK_DATA_AREA_BOOT);
362 card->ext_csd.raw_hc_erase_gap_size =
363 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
364 card->ext_csd.raw_sec_trim_mult =
365 ext_csd[EXT_CSD_SEC_TRIM_MULT];
366 card->ext_csd.raw_sec_erase_mult =
367 ext_csd[EXT_CSD_SEC_ERASE_MULT];
368 card->ext_csd.raw_sec_feature_support =
369 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
370 card->ext_csd.raw_trim_mult =
371 ext_csd[EXT_CSD_TRIM_MULT];
372 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
373 if (card->ext_csd.rev >= 4) {
375 * Enhanced area feature support -- check whether the eMMC
376 * card has the Enhanced area enabled. If so, export enhanced
377 * area offset and size to user by adding sysfs interface.
379 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
380 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
382 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
384 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
386 card->ext_csd.enhanced_area_en = 1;
388 * calculate the enhanced data area offset, in bytes
390 card->ext_csd.enhanced_area_offset =
391 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
392 (ext_csd[137] << 8) + ext_csd[136];
393 if (mmc_card_blockaddr(card))
394 card->ext_csd.enhanced_area_offset <<= 9;
396 * calculate the enhanced data area size, in kilobytes
398 card->ext_csd.enhanced_area_size =
399 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
401 card->ext_csd.enhanced_area_size *=
402 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
403 card->ext_csd.enhanced_area_size <<= 9;
406 * If the enhanced area is not enabled, disable these
409 card->ext_csd.enhanced_area_offset = -EINVAL;
410 card->ext_csd.enhanced_area_size = -EINVAL;
414 * General purpose partition feature support --
415 * If ext_csd has the size of general purpose partitions,
416 * set size, part_cfg, partition name in mmc_part.
418 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
419 EXT_CSD_PART_SUPPORT_PART_EN) {
420 if (card->ext_csd.enhanced_area_en != 1) {
422 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
424 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
426 card->ext_csd.enhanced_area_en = 1;
429 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
430 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
431 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
432 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
435 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
437 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
439 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
440 part_size *= (size_t)(hc_erase_grp_sz *
442 mmc_part_add(card, part_size << 19,
443 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
445 MMC_BLK_DATA_AREA_GP);
448 card->ext_csd.sec_trim_mult =
449 ext_csd[EXT_CSD_SEC_TRIM_MULT];
450 card->ext_csd.sec_erase_mult =
451 ext_csd[EXT_CSD_SEC_ERASE_MULT];
452 card->ext_csd.sec_feature_support =
453 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
454 card->ext_csd.trim_timeout = 300 *
455 ext_csd[EXT_CSD_TRIM_MULT];
458 * Note that the call to mmc_part_add above defaults to read
459 * only. If this default assumption is changed, the call must
460 * take into account the value of boot_locked below.
462 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
463 card->ext_csd.boot_ro_lockable = true;
466 if (card->ext_csd.rev >= 5) {
467 /* Adjust production date as per JEDEC JESD84-B451 */
468 if (card->cid.year < 2010)
469 card->cid.year += 16;
471 /* check whether the eMMC card supports BKOPS */
472 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
473 card->ext_csd.bkops = 1;
474 card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
475 card->ext_csd.raw_bkops_status =
476 ext_csd[EXT_CSD_BKOPS_STATUS];
477 if (!card->ext_csd.bkops_en)
478 pr_info("%s: BKOPS_EN bit is not set\n",
479 mmc_hostname(card->host));
482 /* check whether the eMMC card supports HPI */
483 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
484 card->ext_csd.hpi = 1;
485 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
486 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
488 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
490 * Indicate the maximum timeout to close
491 * a command interrupted by HPI
493 card->ext_csd.out_of_int_time =
494 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
497 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
498 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
501 * RPMB regions are defined in multiples of 128K.
503 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
504 #if 0 //noted by xbw,2014-03-11
505 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
506 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
507 EXT_CSD_PART_CONFIG_ACC_RPMB,
509 MMC_BLK_DATA_AREA_RPMB);
514 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
515 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
516 card->erased_byte = 0xFF;
518 card->erased_byte = 0x0;
520 /* eMMC v4.5 or later */
521 if (card->ext_csd.rev >= 6) {
522 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
524 card->ext_csd.generic_cmd6_time = 10 *
525 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
526 card->ext_csd.power_off_longtime = 10 *
527 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
529 card->ext_csd.cache_size =
530 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
531 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
532 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
533 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
535 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
536 card->ext_csd.data_sector_size = 4096;
538 card->ext_csd.data_sector_size = 512;
540 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
541 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
542 card->ext_csd.data_tag_unit_size =
543 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
544 (card->ext_csd.data_sector_size);
546 card->ext_csd.data_tag_unit_size = 0;
549 card->ext_csd.max_packed_writes =
550 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
551 card->ext_csd.max_packed_reads =
552 ext_csd[EXT_CSD_MAX_PACKED_READS];
554 card->ext_csd.data_sector_size = 512;
561 static inline void mmc_free_ext_csd(u8 *ext_csd)
567 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
572 if (bus_width == MMC_BUS_WIDTH_1)
575 err = mmc_get_ext_csd(card, &bw_ext_csd);
577 if (err || bw_ext_csd == NULL) {
582 /* only compare read only fields */
583 err = !((card->ext_csd.raw_partition_support ==
584 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
585 (card->ext_csd.raw_erased_mem_count ==
586 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
587 (card->ext_csd.rev ==
588 bw_ext_csd[EXT_CSD_REV]) &&
589 (card->ext_csd.raw_ext_csd_structure ==
590 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
591 (card->ext_csd.raw_card_type ==
592 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
593 (card->ext_csd.raw_s_a_timeout ==
594 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
595 (card->ext_csd.raw_hc_erase_gap_size ==
596 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
597 (card->ext_csd.raw_erase_timeout_mult ==
598 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
599 (card->ext_csd.raw_hc_erase_grp_size ==
600 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
601 (card->ext_csd.raw_sec_trim_mult ==
602 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
603 (card->ext_csd.raw_sec_erase_mult ==
604 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
605 (card->ext_csd.raw_sec_feature_support ==
606 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
607 (card->ext_csd.raw_trim_mult ==
608 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
609 (card->ext_csd.raw_sectors[0] ==
610 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
611 (card->ext_csd.raw_sectors[1] ==
612 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
613 (card->ext_csd.raw_sectors[2] ==
614 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
615 (card->ext_csd.raw_sectors[3] ==
616 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
621 mmc_free_ext_csd(bw_ext_csd);
625 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
626 card->raw_cid[2], card->raw_cid[3]);
627 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
628 card->raw_csd[2], card->raw_csd[3]);
629 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
630 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
631 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
632 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
633 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
634 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
635 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
636 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
637 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
638 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
639 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
640 card->ext_csd.enhanced_area_offset);
641 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
642 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
643 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
645 static struct attribute *mmc_std_attrs[] = {
649 &dev_attr_erase_size.attr,
650 &dev_attr_preferred_erase_size.attr,
651 &dev_attr_fwrev.attr,
652 &dev_attr_hwrev.attr,
653 &dev_attr_manfid.attr,
655 &dev_attr_oemid.attr,
657 &dev_attr_serial.attr,
658 &dev_attr_enhanced_area_offset.attr,
659 &dev_attr_enhanced_area_size.attr,
660 &dev_attr_raw_rpmb_size_mult.attr,
661 &dev_attr_rel_sectors.attr,
665 static struct attribute_group mmc_std_attr_group = {
666 .attrs = mmc_std_attrs,
669 static const struct attribute_group *mmc_attr_groups[] = {
674 static struct device_type mmc_type = {
675 .groups = mmc_attr_groups,
679 * Select the PowerClass for the current bus width
680 * If power class is defined for 4/8 bit bus in the
681 * extended CSD register, select it by executing the
682 * mmc_switch command.
684 static int mmc_select_powerclass(struct mmc_card *card,
685 unsigned int bus_width)
688 unsigned int pwrclass_val = 0;
689 struct mmc_host *host;
696 /* Power class selection is supported for versions >= 4.0 */
697 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
700 /* Power class values are defined only for 4/8 bit bus */
701 if (bus_width == EXT_CSD_BUS_WIDTH_1)
704 switch (1 << host->ios.vdd) {
705 case MMC_VDD_165_195:
706 if (host->ios.clock <= 26000000)
707 pwrclass_val = card->ext_csd.raw_pwr_cl_26_195;
708 else if (host->ios.clock <= 52000000)
709 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
710 card->ext_csd.raw_pwr_cl_52_195 :
711 card->ext_csd.raw_pwr_cl_ddr_52_195;
712 else if (host->ios.clock <= 200000000)
713 pwrclass_val = card->ext_csd.raw_pwr_cl_200_195;
724 if (host->ios.clock <= 26000000)
725 pwrclass_val = card->ext_csd.raw_pwr_cl_26_360;
726 else if (host->ios.clock <= 52000000)
727 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
728 card->ext_csd.raw_pwr_cl_52_360 :
729 card->ext_csd.raw_pwr_cl_ddr_52_360;
730 else if (host->ios.clock <= 200000000)
731 pwrclass_val = card->ext_csd.raw_pwr_cl_200_360;
734 pr_warning("%s: Voltage range not supported "
735 "for power class.\n", mmc_hostname(host));
739 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
740 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
741 EXT_CSD_PWR_CL_8BIT_SHIFT;
743 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
744 EXT_CSD_PWR_CL_4BIT_SHIFT;
746 /* If the power class is different from the default value */
747 if (pwrclass_val > 0) {
748 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
751 card->ext_csd.generic_cmd6_time);
758 * Selects the desired buswidth and switch to the HS200 mode
759 * if bus width set without error
761 static int mmc_select_hs200(struct mmc_card *card)
763 int idx, err = -EINVAL;
764 struct mmc_host *host;
765 static unsigned ext_csd_bits[] = {
769 static unsigned bus_widths[] = {
778 if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
779 host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
780 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
782 if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
783 host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
784 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
786 /* If fails try again during next card power cycle */
790 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
793 * Unlike SD, MMC cards dont have a configuration register to notify
794 * supported bus width. So bus test command should be run to identify
795 * the supported bus width or compare the ext csd values of current
796 * bus width and ext csd values of 1 bit mode read earlier.
798 for (; idx >= 0; idx--) {
801 * Host is capable of 8bit transfer, then switch
802 * the device to work in 8bit transfer mode. If the
803 * mmc switch command returns error then switch to
804 * 4bit transfer mode. On success set the corresponding
805 * bus width on the host.
807 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
810 card->ext_csd.generic_cmd6_time);
814 mmc_set_bus_width(card->host, bus_widths[idx]);
816 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
817 err = mmc_compare_ext_csds(card, bus_widths[idx]);
819 err = mmc_bus_test(card, bus_widths[idx]);
824 /* switch to HS200 mode if bus width set successfully */
826 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
827 EXT_CSD_HS_TIMING, 2, 0);
833 * Handle the detection and initialisation of a card.
835 * In the case of a resume, "oldcard" will contain the card
836 * we're trying to reinitialise.
838 static int mmc_init_card(struct mmc_host *host, u32 ocr,
839 struct mmc_card *oldcard)
841 struct mmc_card *card;
844 unsigned int max_dtr;
849 WARN_ON(!host->claimed);
851 /* Set correct bus mode for MMC before attempting init */
852 if (!mmc_host_is_spi(host))
853 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
856 * Since we're changing the OCR value, we seem to
857 * need to tell some cards to go back to the idle
858 * state. We wait 1ms to give cards time to
860 * mmc_go_idle is needed for eMMC that are asleep
864 /* The extra bit indicates that we support high capacity */
865 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
870 * For SPI, enable CRC as appropriate.
872 if (mmc_host_is_spi(host)) {
873 err = mmc_spi_set_crc(host, use_spi_crc);
879 * Fetch CID from card.
881 if (mmc_host_is_spi(host))
882 err = mmc_send_cid(host, cid);
884 err = mmc_all_send_cid(host, cid);
889 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
897 * Allocate card structure.
899 card = mmc_alloc_card(host, &mmc_type);
906 card->type = MMC_TYPE_MMC;
908 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
912 * For native busses: set card RCA and quit open drain mode.
914 if (!mmc_host_is_spi(host)) {
915 err = mmc_set_relative_addr(card);
919 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
924 * Fetch CSD from card.
926 err = mmc_send_csd(card, card->raw_csd);
930 err = mmc_decode_csd(card);
933 err = mmc_decode_cid(card);
939 * Select card, as all following commands rely on that.
941 if (!mmc_host_is_spi(host)) {
942 err = mmc_select_card(card);
949 * Fetch and process extended CSD.
952 err = mmc_get_ext_csd(card, &ext_csd);
955 err = mmc_read_ext_csd(card, ext_csd);
959 /* If doing byte addressing, check if required to do sector
960 * addressing. Handle the case of <2GB cards needing sector
961 * addressing. See section 8.1 JEDEC Standard JED84-A441;
962 * ocr register has bit 30 set for sector addressing.
964 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
965 mmc_card_set_blockaddr(card);
967 /* Erase size depends on CSD and Extended CSD */
968 mmc_set_erase_size(card);
972 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
973 * bit. This bit will be lost every time after a reset or power off.
975 if (card->ext_csd.enhanced_area_en ||
976 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
977 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
978 EXT_CSD_ERASE_GROUP_DEF, 1,
979 card->ext_csd.generic_cmd6_time);
981 if (err && err != -EBADMSG)
987 * Just disable enhanced area off & sz
988 * will try to enable ERASE_GROUP_DEF
989 * during next time reinit
991 card->ext_csd.enhanced_area_offset = -EINVAL;
992 card->ext_csd.enhanced_area_size = -EINVAL;
994 card->ext_csd.erase_group_def = 1;
996 * enable ERASE_GRP_DEF successfully.
997 * This will affect the erase size, so
998 * here need to reset erase size
1000 mmc_set_erase_size(card);
1005 * Ensure eMMC user default partition is enabled
1007 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1008 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1009 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1010 card->ext_csd.part_config,
1011 card->ext_csd.part_time);
1012 if (err && err != -EBADMSG)
1017 * Enable power_off_notification byte in the ext_csd register
1019 if (card->ext_csd.rev >= 6) {
1020 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1021 EXT_CSD_POWER_OFF_NOTIFICATION,
1023 card->ext_csd.generic_cmd6_time);
1024 if (err && err != -EBADMSG)
1028 * The err can be -EBADMSG or 0,
1029 * so check for success and update the flag
1032 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1036 * Activate high speed (if supported)
1038 if (card->ext_csd.hs_max_dtr != 0) {
1040 if (card->ext_csd.hs_max_dtr > 52000000 &&
1041 host->caps2 & MMC_CAP2_HS200)
1042 err = mmc_select_hs200(card);
1043 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1044 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1045 EXT_CSD_HS_TIMING, 1,
1046 card->ext_csd.generic_cmd6_time);
1048 if (err && err != -EBADMSG)
1052 pr_warning("%s: switch to highspeed failed\n",
1053 mmc_hostname(card->host));
1056 if (card->ext_csd.hs_max_dtr > 52000000 &&
1057 host->caps2 & MMC_CAP2_HS200) {
1058 mmc_card_set_hs200(card);
1059 mmc_set_timing(card->host,
1060 MMC_TIMING_MMC_HS200);
1062 mmc_card_set_highspeed(card);
1063 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1069 * Compute bus speed.
1071 max_dtr = (unsigned int)-1;
1073 if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1074 if (max_dtr > card->ext_csd.hs_max_dtr)
1075 max_dtr = card->ext_csd.hs_max_dtr;
1076 if (mmc_card_highspeed(card) && (max_dtr > 52000000))
1078 } else if (max_dtr > card->csd.max_dtr) {
1079 max_dtr = card->csd.max_dtr;
1082 mmc_set_clock(host, max_dtr);
1085 * Indicate DDR mode (if supported).
1087 if (mmc_card_highspeed(card)) {
1088 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1089 && (host->caps & MMC_CAP_1_8V_DDR))
1090 ddr = MMC_1_8V_DDR_MODE;
1091 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1092 && (host->caps & MMC_CAP_1_2V_DDR))
1093 ddr = MMC_1_2V_DDR_MODE;
1097 * Indicate HS200 SDR mode (if supported).
1099 if (mmc_card_hs200(card)) {
1101 u32 bus_width = card->host->ios.bus_width;
1104 * For devices supporting HS200 mode, the bus width has
1105 * to be set before executing the tuning function. If
1106 * set before tuning, then device will respond with CRC
1107 * errors for responses on CMD line. So for HS200 the
1109 * 1. set bus width 4bit / 8 bit (1 bit not supported)
1110 * 2. switch to HS200 mode
1111 * 3. set the clock to > 52Mhz <=200MHz and
1112 * 4. execute tuning for HS200
1115 if ((host->caps2 & MMC_CAP2_HS200) &&
1116 card->host->ops->execute_tuning) {
1117 mmc_host_clk_hold(card->host);
1118 err = card->host->ops->execute_tuning(card->host,
1119 MMC_SEND_TUNING_BLOCK_HS200);
1120 mmc_host_clk_release(card->host);
1123 pr_warning("%s: tuning execution failed\n",
1124 mmc_hostname(card->host));
1128 if (host->caps2 & MMC_CAP2_HS200)
1129 mmc_execute_tuning(card);
1131 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1132 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1133 err = mmc_select_powerclass(card, ext_csd_bits);
1135 pr_warning("%s: power class selection to bus width %d"
1136 " failed\n", mmc_hostname(card->host),
1141 * Activate wide bus and DDR (if supported).
1143 if (!mmc_card_hs200(card) &&
1144 (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1145 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1146 static unsigned ext_csd_bits[][2] = {
1147 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1148 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1149 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1151 static unsigned bus_widths[] = {
1156 unsigned idx, bus_width = 0;
1158 if (host->caps & MMC_CAP_8_BIT_DATA)
1162 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1163 bus_width = bus_widths[idx];
1164 if (bus_width == MMC_BUS_WIDTH_1)
1165 ddr = 0; /* no DDR for 1-bit width */
1166 err = mmc_select_powerclass(card, ext_csd_bits[idx][0]);
1168 pr_warning("%s: power class selection to "
1169 "bus width %d failed\n",
1170 mmc_hostname(card->host),
1173 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1175 ext_csd_bits[idx][0],
1176 card->ext_csd.generic_cmd6_time);
1178 mmc_set_bus_width(card->host, bus_width);
1181 * If controller can't handle bus width test,
1182 * compare ext_csd previously read in 1 bit mode
1183 * against ext_csd at new bus width
1185 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1186 err = mmc_compare_ext_csds(card,
1189 err = mmc_bus_test(card, bus_width);
1196 err = mmc_select_powerclass(card, ext_csd_bits[idx][1]);
1198 pr_warning("%s: power class selection to "
1199 "bus width %d ddr %d failed\n",
1200 mmc_hostname(card->host),
1201 1 << bus_width, ddr);
1203 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1205 ext_csd_bits[idx][1],
1206 card->ext_csd.generic_cmd6_time);
1209 pr_warning("%s: switch to bus width %d ddr %d "
1210 "failed\n", mmc_hostname(card->host),
1211 1 << bus_width, ddr);
1215 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1218 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1220 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1221 * in the JEDEC spec for DDR.
1223 * Do not force change in vccq since we are obviously
1224 * working and no change to vccq is needed.
1226 * WARNING: eMMC rules are NOT the same as SD DDR
1228 if (ddr == MMC_1_2V_DDR_MODE) {
1229 err = __mmc_set_signal_voltage(host,
1230 MMC_SIGNAL_VOLTAGE_120);
1234 mmc_card_set_ddr_mode(card);
1235 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1236 mmc_set_bus_width(card->host, bus_width);
1241 * Enable HPI feature (if supported)
1243 if (card->ext_csd.hpi) {
1244 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1245 EXT_CSD_HPI_MGMT, 1,
1246 card->ext_csd.generic_cmd6_time);
1247 if (err && err != -EBADMSG)
1250 pr_warning("%s: Enabling HPI failed\n",
1251 mmc_hostname(card->host));
1254 card->ext_csd.hpi_en = 1;
1258 * If cache size is higher than 0, this indicates
1259 * the existence of cache and it can be turned on.
1261 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1262 card->ext_csd.cache_size > 0) {
1263 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1264 EXT_CSD_CACHE_CTRL, 1,
1265 card->ext_csd.generic_cmd6_time);
1266 if (err && err != -EBADMSG)
1270 * Only if no error, cache is turned on successfully.
1273 pr_warning("%s: Cache is supported, "
1274 "but failed to turn on (%d)\n",
1275 mmc_hostname(card->host), err);
1276 card->ext_csd.cache_ctrl = 0;
1279 card->ext_csd.cache_ctrl = 1;
1284 * The mandatory minimum values are defined for packed command.
1287 if (card->ext_csd.max_packed_writes >= 3 &&
1288 card->ext_csd.max_packed_reads >= 5 &&
1289 host->caps2 & MMC_CAP2_PACKED_CMD) {
1290 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1291 EXT_CSD_EXP_EVENTS_CTRL,
1292 EXT_CSD_PACKED_EVENT_EN,
1293 card->ext_csd.generic_cmd6_time);
1294 if (err && err != -EBADMSG)
1297 pr_warn("%s: Enabling packed event failed\n",
1298 mmc_hostname(card->host));
1299 card->ext_csd.packed_event_en = 0;
1302 card->ext_csd.packed_event_en = 1;
1309 mmc_free_ext_csd(ext_csd);
1314 mmc_remove_card(card);
1316 mmc_free_ext_csd(ext_csd);
1321 static int mmc_can_sleep(struct mmc_card *card)
1323 return (card && card->ext_csd.rev >= 3);
1326 static int mmc_sleep(struct mmc_host *host)
1328 struct mmc_command cmd = {0};
1329 struct mmc_card *card = host->card;
1332 if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
1335 err = mmc_deselect_cards(host);
1339 cmd.opcode = MMC_SLEEP_AWAKE;
1340 cmd.arg = card->rca << 16;
1343 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1344 err = mmc_wait_for_cmd(host, &cmd, 0);
1349 * If the host does not wait while the card signals busy, then we will
1350 * will have to wait the sleep/awake timeout. Note, we cannot use the
1351 * SEND_STATUS command to poll the status because that command (and most
1352 * others) is invalid while the card sleeps.
1354 if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1355 mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000));
1360 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1363 mmc_card_mmc(card) &&
1364 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1367 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1369 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1372 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1373 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1374 timeout = card->ext_csd.power_off_longtime;
1376 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1377 EXT_CSD_POWER_OFF_NOTIFICATION,
1378 notify_type, timeout, true, false);
1380 pr_err("%s: Power Off Notification timed out, %u\n",
1381 mmc_hostname(card->host), timeout);
1383 /* Disable the power off notification after the switch operation. */
1384 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1390 * Host is being removed. Free up the current card.
1392 static void mmc_remove(struct mmc_host *host)
1395 BUG_ON(!host->card);
1397 mmc_remove_card(host->card);
1402 * Card detection - card is alive.
1404 static int mmc_alive(struct mmc_host *host)
1406 return mmc_send_status(host->card, NULL);
1410 * Card detection callback from host.
1412 static void mmc_detect(struct mmc_host *host)
1417 BUG_ON(!host->card);
1419 mmc_get_card(host->card);
1422 * Just check if our card has been removed.
1424 err = _mmc_detect_card_removed(host);
1426 mmc_put_card(host->card);
1431 mmc_claim_host(host);
1432 mmc_detach_bus(host);
1433 mmc_power_off(host);
1434 mmc_release_host(host);
1438 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1441 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1442 EXT_CSD_POWER_OFF_LONG;
1445 BUG_ON(!host->card);
1447 mmc_claim_host(host);
1449 if (mmc_card_suspended(host->card))
1452 if (mmc_card_doing_bkops(host->card)) {
1453 err = mmc_stop_bkops(host->card);
1458 err = mmc_cache_ctrl(host, 0);
1462 if (mmc_can_poweroff_notify(host->card) &&
1463 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1464 err = mmc_poweroff_notify(host->card, notify_type);
1465 else if (mmc_can_sleep(host->card))
1466 err = mmc_sleep(host);
1467 else if (!mmc_host_is_spi(host))
1468 err = mmc_deselect_cards(host);
1469 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1472 mmc_power_off(host);
1473 mmc_card_set_suspended(host->card);
1476 mmc_release_host(host);
1483 static int mmc_suspend(struct mmc_host *host)
1487 err = _mmc_suspend(host, true);
1489 pm_runtime_disable(&host->card->dev);
1490 pm_runtime_set_suspended(&host->card->dev);
1497 * Resume callback from host.
1499 * This function tries to determine if the same card is still present
1500 * and, if so, restore all state to it.
1502 static int _mmc_resume(struct mmc_host *host)
1507 BUG_ON(!host->card);
1509 mmc_claim_host(host);
1511 if (!mmc_card_suspended(host->card))
1514 mmc_power_up(host, host->card->ocr);
1515 err = mmc_init_card(host, host->card->ocr, host->card);
1516 mmc_card_clr_suspended(host->card);
1519 mmc_release_host(host);
1525 * Callback for resume.
1527 static int mmc_resume(struct mmc_host *host)
1531 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1532 err = _mmc_resume(host);
1533 pm_runtime_set_active(&host->card->dev);
1534 pm_runtime_mark_last_busy(&host->card->dev);
1536 pm_runtime_enable(&host->card->dev);
1542 static int mmc_shutdown(struct mmc_host *host)
1547 * In a specific case for poweroff notify, we need to resume the card
1548 * before we can shutdown it properly.
1550 if (mmc_can_poweroff_notify(host->card) &&
1551 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1552 err = mmc_resume(host);
1555 err = _mmc_suspend(host, false);
1561 * Callback for runtime_suspend.
1563 static int mmc_runtime_suspend(struct mmc_host *host)
1567 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1570 err = _mmc_suspend(host, true);
1572 pr_err("%s: error %d doing aggessive suspend\n",
1573 mmc_hostname(host), err);
1579 * Callback for runtime_resume.
1581 static int mmc_runtime_resume(struct mmc_host *host)
1585 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1588 err = _mmc_resume(host);
1590 pr_err("%s: error %d doing aggessive resume\n",
1591 mmc_hostname(host), err);
1596 static int mmc_power_restore(struct mmc_host *host)
1600 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1601 mmc_claim_host(host);
1602 ret = mmc_init_card(host, host->card->ocr, host->card);
1603 mmc_release_host(host);
1608 static const struct mmc_bus_ops mmc_ops = {
1609 .remove = mmc_remove,
1610 .detect = mmc_detect,
1613 .power_restore = mmc_power_restore,
1615 .shutdown = mmc_shutdown,
1618 static const struct mmc_bus_ops mmc_ops_unsafe = {
1619 .remove = mmc_remove,
1620 .detect = mmc_detect,
1621 .suspend = mmc_suspend,
1622 .resume = mmc_resume,
1623 .runtime_suspend = mmc_runtime_suspend,
1624 .runtime_resume = mmc_runtime_resume,
1625 .power_restore = mmc_power_restore,
1627 .shutdown = mmc_shutdown,
1630 static void mmc_attach_bus_ops(struct mmc_host *host)
1632 const struct mmc_bus_ops *bus_ops;
1634 if (!mmc_card_is_removable(host))
1635 bus_ops = &mmc_ops_unsafe;
1638 mmc_attach_bus(host, bus_ops);
1642 * Starting point for MMC card init.
1644 int mmc_attach_mmc(struct mmc_host *host)
1650 WARN_ON(!host->claimed);
1652 /* Set correct bus mode for MMC before attempting attach */
1653 if (!mmc_host_is_spi(host))
1654 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1656 err = mmc_send_op_cond(host, 0, &ocr);
1660 mmc_attach_bus_ops(host);
1661 if (host->ocr_avail_mmc)
1662 host->ocr_avail = host->ocr_avail_mmc;
1665 * We need to get OCR a different way for SPI.
1667 if (mmc_host_is_spi(host)) {
1668 err = mmc_spi_read_ocr(host, 1, &ocr);
1673 rocr = mmc_select_voltage(host, ocr);
1676 * Can we support the voltage of the card?
1684 * Detect and init the card.
1686 err = mmc_init_card(host, rocr, NULL);
1690 mmc_release_host(host);
1691 err = mmc_add_card(host->card);
1692 mmc_claim_host(host);
1699 mmc_release_host(host);
1700 mmc_remove_card(host->card);
1701 mmc_claim_host(host);
1704 mmc_detach_bus(host);
1706 pr_err("%s: error %d whilst initialising MMC card\n",
1707 mmc_hostname(host), err);