1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/mmc/core/mmc.c
5 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
6 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
7 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
10 #include <linux/err.h>
12 #include <linux/slab.h>
13 #include <linux/stat.h>
14 #include <linux/pm_runtime.h>
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
29 #define DEFAULT_CMD6_TIMEOUT_MS 500
30 #define MIN_CACHE_EN_TIMEOUT_MS 1600
32 static const unsigned int tran_exp[] = {
33 10000, 100000, 1000000, 10000000,
37 static const unsigned char tran_mant[] = {
38 0, 10, 12, 13, 15, 20, 25, 30,
39 35, 40, 45, 50, 55, 60, 70, 80,
42 static const unsigned int taac_exp[] = {
43 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
46 static const unsigned int taac_mant[] = {
47 0, 10, 12, 13, 15, 20, 25, 30,
48 35, 40, 45, 50, 55, 60, 70, 80,
51 #define UNSTUFF_BITS(resp,start,size) \
53 const int __size = size; \
54 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
55 const int __off = 3 - ((start) / 32); \
56 const int __shft = (start) & 31; \
59 __res = resp[__off] >> __shft; \
60 if (__size + __shft > 32) \
61 __res |= resp[__off-1] << ((32 - __shft) % 32); \
66 * Given the decoded CSD structure, decode the raw CID to our CID structure.
68 static int mmc_decode_cid(struct mmc_card *card)
70 u32 *resp = card->raw_cid;
73 * The selection of the format here is based upon published
74 * specs from sandisk and from what people have reported.
76 switch (card->csd.mmca_vsn) {
77 case 0: /* MMC v1.0 - v1.2 */
78 case 1: /* MMC v1.4 */
79 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
80 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
81 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
82 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
83 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
84 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
85 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
86 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
87 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
88 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
89 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
90 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
91 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
94 case 2: /* MMC v2.0 - v2.2 */
95 case 3: /* MMC v3.1 - v3.3 */
97 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
98 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
99 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
100 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
101 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
102 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
103 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
104 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
105 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
106 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
107 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
108 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
112 pr_err("%s: card has unknown MMCA version %d\n",
113 mmc_hostname(card->host), card->csd.mmca_vsn);
120 static void mmc_set_erase_size(struct mmc_card *card)
122 if (card->ext_csd.erase_group_def & 1)
123 card->erase_size = card->ext_csd.hc_erase_size;
125 card->erase_size = card->csd.erase_size;
127 mmc_init_erase(card);
131 * Given a 128-bit response, decode to our card CSD structure.
133 static int mmc_decode_csd(struct mmc_card *card)
135 struct mmc_csd *csd = &card->csd;
136 unsigned int e, m, a, b;
137 u32 *resp = card->raw_csd;
140 * We only understand CSD structure v1.1 and v1.2.
141 * v1.2 has extra information in bits 15, 11 and 10.
142 * We also support eMMC v4.4 & v4.41.
144 csd->structure = UNSTUFF_BITS(resp, 126, 2);
145 if (csd->structure == 0) {
146 pr_err("%s: unrecognised CSD structure version %d\n",
147 mmc_hostname(card->host), csd->structure);
151 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
152 m = UNSTUFF_BITS(resp, 115, 4);
153 e = UNSTUFF_BITS(resp, 112, 3);
154 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
155 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
157 m = UNSTUFF_BITS(resp, 99, 4);
158 e = UNSTUFF_BITS(resp, 96, 3);
159 csd->max_dtr = tran_exp[e] * tran_mant[m];
160 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
162 e = UNSTUFF_BITS(resp, 47, 3);
163 m = UNSTUFF_BITS(resp, 62, 12);
164 csd->capacity = (1 + m) << (e + 2);
166 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
167 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
168 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
169 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
170 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
171 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
172 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
173 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
175 if (csd->write_blkbits >= 9) {
176 a = UNSTUFF_BITS(resp, 42, 5);
177 b = UNSTUFF_BITS(resp, 37, 5);
178 csd->erase_size = (a + 1) * (b + 1);
179 csd->erase_size <<= csd->write_blkbits - 9;
185 static void mmc_select_card_type(struct mmc_card *card)
187 struct mmc_host *host = card->host;
188 u8 card_type = card->ext_csd.raw_card_type;
189 u32 caps = host->caps, caps2 = host->caps2;
190 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
191 unsigned int avail_type = 0;
193 if (caps & MMC_CAP_MMC_HIGHSPEED &&
194 card_type & EXT_CSD_CARD_TYPE_HS_26) {
195 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
196 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
199 if (caps & MMC_CAP_MMC_HIGHSPEED &&
200 card_type & EXT_CSD_CARD_TYPE_HS_52) {
201 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
202 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
205 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
206 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
207 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
208 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
211 if (caps & MMC_CAP_1_2V_DDR &&
212 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
213 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
214 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
217 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
218 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
219 hs200_max_dtr = MMC_HS200_MAX_DTR;
220 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
223 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
224 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
225 hs200_max_dtr = MMC_HS200_MAX_DTR;
226 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
229 if (caps2 & MMC_CAP2_HS400_1_8V &&
230 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
231 hs200_max_dtr = MMC_HS200_MAX_DTR;
232 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
235 if (caps2 & MMC_CAP2_HS400_1_2V &&
236 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
237 hs200_max_dtr = MMC_HS200_MAX_DTR;
238 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
241 if ((caps2 & MMC_CAP2_HS400_ES) &&
242 card->ext_csd.strobe_support &&
243 (avail_type & EXT_CSD_CARD_TYPE_HS400))
244 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
246 card->ext_csd.hs_max_dtr = hs_max_dtr;
247 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
248 card->mmc_avail_type = avail_type;
251 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
253 u8 hc_erase_grp_sz, hc_wp_grp_sz;
256 * Disable these attributes by default
258 card->ext_csd.enhanced_area_offset = -EINVAL;
259 card->ext_csd.enhanced_area_size = -EINVAL;
262 * Enhanced area feature support -- check whether the eMMC
263 * card has the Enhanced area enabled. If so, export enhanced
264 * area offset and size to user by adding sysfs interface.
266 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
267 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
268 if (card->ext_csd.partition_setting_completed) {
270 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
272 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
275 * calculate the enhanced data area offset, in bytes
277 card->ext_csd.enhanced_area_offset =
278 (((unsigned long long)ext_csd[139]) << 24) +
279 (((unsigned long long)ext_csd[138]) << 16) +
280 (((unsigned long long)ext_csd[137]) << 8) +
281 (((unsigned long long)ext_csd[136]));
282 if (mmc_card_blockaddr(card))
283 card->ext_csd.enhanced_area_offset <<= 9;
285 * calculate the enhanced data area size, in kilobytes
287 card->ext_csd.enhanced_area_size =
288 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
290 card->ext_csd.enhanced_area_size *=
291 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
292 card->ext_csd.enhanced_area_size <<= 9;
294 pr_warn("%s: defines enhanced area without partition setting complete\n",
295 mmc_hostname(card->host));
300 static void mmc_part_add(struct mmc_card *card, u64 size,
301 unsigned int part_cfg, char *name, int idx, bool ro,
304 card->part[card->nr_parts].size = size;
305 card->part[card->nr_parts].part_cfg = part_cfg;
306 sprintf(card->part[card->nr_parts].name, name, idx);
307 card->part[card->nr_parts].force_ro = ro;
308 card->part[card->nr_parts].area_type = area_type;
312 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
315 u8 hc_erase_grp_sz, hc_wp_grp_sz;
319 * General purpose partition feature support --
320 * If ext_csd has the size of general purpose partitions,
321 * set size, part_cfg, partition name in mmc_part.
323 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
324 EXT_CSD_PART_SUPPORT_PART_EN) {
326 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
328 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
330 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
331 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
332 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
333 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
335 if (card->ext_csd.partition_setting_completed == 0) {
336 pr_warn("%s: has partition size defined without partition complete\n",
337 mmc_hostname(card->host));
341 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
343 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
345 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
346 part_size *= (hc_erase_grp_sz * hc_wp_grp_sz);
347 mmc_part_add(card, part_size << 19,
348 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
350 MMC_BLK_DATA_AREA_GP);
355 /* Minimum partition switch timeout in milliseconds */
356 #define MMC_MIN_PART_SWITCH_TIME 300
359 * Decode extended CSD.
361 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
365 struct device_node *np;
366 bool broken_hpi = false;
368 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
369 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
370 if (card->csd.structure == 3) {
371 if (card->ext_csd.raw_ext_csd_structure > 2) {
372 pr_err("%s: unrecognised EXT_CSD structure "
373 "version %d\n", mmc_hostname(card->host),
374 card->ext_csd.raw_ext_csd_structure);
380 np = mmc_of_find_child_device(card->host, 0);
381 if (np && of_device_is_compatible(np, "mmc-card"))
382 broken_hpi = of_property_read_bool(np, "broken-hpi");
386 * The EXT_CSD format is meant to be forward compatible. As long
387 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
388 * are authorized, see JEDEC JESD84-B50 section B.8.
390 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
392 /* fixup device after ext_csd revision field is updated */
393 mmc_fixup_device(card, mmc_ext_csd_fixups);
395 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
396 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
397 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
398 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
399 if (card->ext_csd.rev >= 2) {
400 card->ext_csd.sectors =
401 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
402 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
403 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
404 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
406 /* Cards with density > 2GiB are sector addressed */
407 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
408 mmc_card_set_blockaddr(card);
411 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
412 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
413 mmc_select_card_type(card);
415 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
416 card->ext_csd.raw_erase_timeout_mult =
417 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
418 card->ext_csd.raw_hc_erase_grp_size =
419 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
420 if (card->ext_csd.rev >= 3) {
421 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
422 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
424 /* EXT_CSD value is in units of 10ms, but we store in ms */
425 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
426 /* Some eMMC set the value too low so set a minimum */
427 if (card->ext_csd.part_time &&
428 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
429 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
431 /* Sleep / awake timeout in 100ns units */
432 if (sa_shift > 0 && sa_shift <= 0x17)
433 card->ext_csd.sa_timeout =
434 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
435 card->ext_csd.erase_group_def =
436 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
437 card->ext_csd.hc_erase_timeout = 300 *
438 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
439 card->ext_csd.hc_erase_size =
440 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
442 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
445 * There are two boot regions of equal size, defined in
448 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
449 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
450 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
451 mmc_part_add(card, part_size,
452 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
454 MMC_BLK_DATA_AREA_BOOT);
459 card->ext_csd.raw_hc_erase_gap_size =
460 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
461 card->ext_csd.raw_sec_trim_mult =
462 ext_csd[EXT_CSD_SEC_TRIM_MULT];
463 card->ext_csd.raw_sec_erase_mult =
464 ext_csd[EXT_CSD_SEC_ERASE_MULT];
465 card->ext_csd.raw_sec_feature_support =
466 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
467 card->ext_csd.raw_trim_mult =
468 ext_csd[EXT_CSD_TRIM_MULT];
469 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
470 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
471 if (card->ext_csd.rev >= 4) {
472 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
473 EXT_CSD_PART_SETTING_COMPLETED)
474 card->ext_csd.partition_setting_completed = 1;
476 card->ext_csd.partition_setting_completed = 0;
478 mmc_manage_enhanced_area(card, ext_csd);
480 mmc_manage_gp_partitions(card, ext_csd);
482 card->ext_csd.sec_trim_mult =
483 ext_csd[EXT_CSD_SEC_TRIM_MULT];
484 card->ext_csd.sec_erase_mult =
485 ext_csd[EXT_CSD_SEC_ERASE_MULT];
486 card->ext_csd.sec_feature_support =
487 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
488 card->ext_csd.trim_timeout = 300 *
489 ext_csd[EXT_CSD_TRIM_MULT];
492 * Note that the call to mmc_part_add above defaults to read
493 * only. If this default assumption is changed, the call must
494 * take into account the value of boot_locked below.
496 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
497 card->ext_csd.boot_ro_lockable = true;
499 /* Save power class values */
500 card->ext_csd.raw_pwr_cl_52_195 =
501 ext_csd[EXT_CSD_PWR_CL_52_195];
502 card->ext_csd.raw_pwr_cl_26_195 =
503 ext_csd[EXT_CSD_PWR_CL_26_195];
504 card->ext_csd.raw_pwr_cl_52_360 =
505 ext_csd[EXT_CSD_PWR_CL_52_360];
506 card->ext_csd.raw_pwr_cl_26_360 =
507 ext_csd[EXT_CSD_PWR_CL_26_360];
508 card->ext_csd.raw_pwr_cl_200_195 =
509 ext_csd[EXT_CSD_PWR_CL_200_195];
510 card->ext_csd.raw_pwr_cl_200_360 =
511 ext_csd[EXT_CSD_PWR_CL_200_360];
512 card->ext_csd.raw_pwr_cl_ddr_52_195 =
513 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
514 card->ext_csd.raw_pwr_cl_ddr_52_360 =
515 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
516 card->ext_csd.raw_pwr_cl_ddr_200_360 =
517 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
520 if (card->ext_csd.rev >= 5) {
521 /* Adjust production date as per JEDEC JESD84-B451 */
522 if (card->cid.year < 2010)
523 card->cid.year += 16;
525 /* check whether the eMMC card supports BKOPS */
526 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
527 card->ext_csd.bkops = 1;
528 card->ext_csd.man_bkops_en =
529 (ext_csd[EXT_CSD_BKOPS_EN] &
530 EXT_CSD_MANUAL_BKOPS_MASK);
531 card->ext_csd.raw_bkops_status =
532 ext_csd[EXT_CSD_BKOPS_STATUS];
533 if (card->ext_csd.man_bkops_en)
534 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
535 mmc_hostname(card->host));
536 card->ext_csd.auto_bkops_en =
537 (ext_csd[EXT_CSD_BKOPS_EN] &
538 EXT_CSD_AUTO_BKOPS_MASK);
539 if (card->ext_csd.auto_bkops_en)
540 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
541 mmc_hostname(card->host));
544 /* check whether the eMMC card supports HPI */
545 if (!mmc_card_broken_hpi(card) &&
546 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
547 card->ext_csd.hpi = 1;
548 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
549 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
551 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
553 * Indicate the maximum timeout to close
554 * a command interrupted by HPI
556 card->ext_csd.out_of_int_time =
557 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
560 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
561 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
564 * RPMB regions are defined in multiples of 128K.
566 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
567 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
568 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
569 EXT_CSD_PART_CONFIG_ACC_RPMB,
571 MMC_BLK_DATA_AREA_RPMB);
575 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
576 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
577 card->erased_byte = 0xFF;
579 card->erased_byte = 0x0;
581 /* eMMC v4.5 or later */
582 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
583 if (card->ext_csd.rev >= 6) {
584 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
586 card->ext_csd.generic_cmd6_time = 10 *
587 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
588 card->ext_csd.power_off_longtime = 10 *
589 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
591 card->ext_csd.cache_size =
592 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
593 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
594 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
595 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
597 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
598 card->ext_csd.data_sector_size = 4096;
600 card->ext_csd.data_sector_size = 512;
602 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
603 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
604 card->ext_csd.data_tag_unit_size =
605 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
606 (card->ext_csd.data_sector_size);
608 card->ext_csd.data_tag_unit_size = 0;
611 card->ext_csd.max_packed_writes =
612 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
613 card->ext_csd.max_packed_reads =
614 ext_csd[EXT_CSD_MAX_PACKED_READS];
616 card->ext_csd.data_sector_size = 512;
619 /* eMMC v5 or later */
620 if (card->ext_csd.rev >= 7) {
621 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
623 card->ext_csd.ffu_capable =
624 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
625 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
627 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
628 card->ext_csd.device_life_time_est_typ_a =
629 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
630 card->ext_csd.device_life_time_est_typ_b =
631 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
634 /* eMMC v5.1 or later */
635 if (card->ext_csd.rev >= 8) {
636 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
637 EXT_CSD_CMDQ_SUPPORTED;
638 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
639 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
640 /* Exclude inefficiently small queue depths */
641 if (card->ext_csd.cmdq_depth <= 2) {
642 card->ext_csd.cmdq_support = false;
643 card->ext_csd.cmdq_depth = 0;
645 if (card->ext_csd.cmdq_support) {
646 pr_debug("%s: Command Queue supported depth %u\n",
647 mmc_hostname(card->host),
648 card->ext_csd.cmdq_depth);
650 card->ext_csd.enhanced_rpmb_supported =
651 (card->ext_csd.rel_param &
652 EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR);
658 static int mmc_read_ext_csd(struct mmc_card *card)
663 if (!mmc_can_ext_csd(card))
666 err = mmc_get_ext_csd(card, &ext_csd);
668 /* If the host or the card can't do the switch,
669 * fail more gracefully. */
676 * High capacity cards should have this "magic" size
677 * stored in their CSD.
679 if (card->csd.capacity == (4096 * 512)) {
680 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
681 mmc_hostname(card->host));
683 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
684 mmc_hostname(card->host));
691 err = mmc_decode_ext_csd(card, ext_csd);
696 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
701 if (bus_width == MMC_BUS_WIDTH_1)
704 err = mmc_get_ext_csd(card, &bw_ext_csd);
708 /* only compare read only fields */
709 err = !((card->ext_csd.raw_partition_support ==
710 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
711 (card->ext_csd.raw_erased_mem_count ==
712 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
713 (card->ext_csd.rev ==
714 bw_ext_csd[EXT_CSD_REV]) &&
715 (card->ext_csd.raw_ext_csd_structure ==
716 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
717 (card->ext_csd.raw_card_type ==
718 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
719 (card->ext_csd.raw_s_a_timeout ==
720 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
721 (card->ext_csd.raw_hc_erase_gap_size ==
722 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
723 (card->ext_csd.raw_erase_timeout_mult ==
724 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
725 (card->ext_csd.raw_hc_erase_grp_size ==
726 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
727 (card->ext_csd.raw_sec_trim_mult ==
728 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
729 (card->ext_csd.raw_sec_erase_mult ==
730 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
731 (card->ext_csd.raw_sec_feature_support ==
732 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
733 (card->ext_csd.raw_trim_mult ==
734 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
735 (card->ext_csd.raw_sectors[0] ==
736 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
737 (card->ext_csd.raw_sectors[1] ==
738 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
739 (card->ext_csd.raw_sectors[2] ==
740 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
741 (card->ext_csd.raw_sectors[3] ==
742 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
743 (card->ext_csd.raw_pwr_cl_52_195 ==
744 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
745 (card->ext_csd.raw_pwr_cl_26_195 ==
746 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
747 (card->ext_csd.raw_pwr_cl_52_360 ==
748 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
749 (card->ext_csd.raw_pwr_cl_26_360 ==
750 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
751 (card->ext_csd.raw_pwr_cl_200_195 ==
752 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
753 (card->ext_csd.raw_pwr_cl_200_360 ==
754 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
755 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
756 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
757 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
758 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
759 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
760 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
769 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
770 card->raw_cid[2], card->raw_cid[3]);
771 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
772 card->raw_csd[2], card->raw_csd[3]);
773 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
774 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
775 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
776 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
777 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
778 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
779 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
780 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
781 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
782 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
783 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
784 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
785 card->ext_csd.device_life_time_est_typ_a,
786 card->ext_csd.device_life_time_est_typ_b);
787 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
788 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
789 card->ext_csd.enhanced_area_offset);
790 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
791 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
792 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n",
793 card->ext_csd.enhanced_rpmb_supported);
794 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
795 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
796 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
797 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
799 static ssize_t mmc_fwrev_show(struct device *dev,
800 struct device_attribute *attr,
803 struct mmc_card *card = mmc_dev_to_card(dev);
805 if (card->ext_csd.rev < 7) {
806 return sprintf(buf, "0x%x\n", card->cid.fwrev);
808 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
809 card->ext_csd.fwrev);
813 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
815 static ssize_t mmc_dsr_show(struct device *dev,
816 struct device_attribute *attr,
819 struct mmc_card *card = mmc_dev_to_card(dev);
820 struct mmc_host *host = card->host;
822 if (card->csd.dsr_imp && host->dsr_req)
823 return sprintf(buf, "0x%x\n", host->dsr);
825 /* return default DSR value */
826 return sprintf(buf, "0x%x\n", 0x404);
829 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
831 static struct attribute *mmc_std_attrs[] = {
835 &dev_attr_erase_size.attr,
836 &dev_attr_preferred_erase_size.attr,
837 &dev_attr_fwrev.attr,
838 &dev_attr_ffu_capable.attr,
839 &dev_attr_hwrev.attr,
840 &dev_attr_manfid.attr,
842 &dev_attr_oemid.attr,
845 &dev_attr_pre_eol_info.attr,
846 &dev_attr_life_time.attr,
847 &dev_attr_serial.attr,
848 &dev_attr_enhanced_area_offset.attr,
849 &dev_attr_enhanced_area_size.attr,
850 &dev_attr_raw_rpmb_size_mult.attr,
851 &dev_attr_enhanced_rpmb_supported.attr,
852 &dev_attr_rel_sectors.attr,
856 &dev_attr_cmdq_en.attr,
859 ATTRIBUTE_GROUPS(mmc_std);
861 static struct device_type mmc_type = {
862 .groups = mmc_std_groups,
866 * Select the PowerClass for the current bus width
867 * If power class is defined for 4/8 bit bus in the
868 * extended CSD register, select it by executing the
869 * mmc_switch command.
871 static int __mmc_select_powerclass(struct mmc_card *card,
872 unsigned int bus_width)
874 struct mmc_host *host = card->host;
875 struct mmc_ext_csd *ext_csd = &card->ext_csd;
876 unsigned int pwrclass_val = 0;
879 switch (1 << host->ios.vdd) {
880 case MMC_VDD_165_195:
881 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
882 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
883 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
884 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
885 ext_csd->raw_pwr_cl_52_195 :
886 ext_csd->raw_pwr_cl_ddr_52_195;
887 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
888 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
899 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
900 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
901 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
902 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
903 ext_csd->raw_pwr_cl_52_360 :
904 ext_csd->raw_pwr_cl_ddr_52_360;
905 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
906 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
907 ext_csd->raw_pwr_cl_ddr_200_360 :
908 ext_csd->raw_pwr_cl_200_360;
911 pr_warn("%s: Voltage range not supported for power class\n",
916 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
917 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
918 EXT_CSD_PWR_CL_8BIT_SHIFT;
920 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
921 EXT_CSD_PWR_CL_4BIT_SHIFT;
923 /* If the power class is different from the default value */
924 if (pwrclass_val > 0) {
925 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
928 card->ext_csd.generic_cmd6_time);
934 static int mmc_select_powerclass(struct mmc_card *card)
936 struct mmc_host *host = card->host;
937 u32 bus_width, ext_csd_bits;
940 /* Power class selection is supported for versions >= 4.0 */
941 if (!mmc_can_ext_csd(card))
944 bus_width = host->ios.bus_width;
945 /* Power class values are defined only for 4/8 bit bus */
946 if (bus_width == MMC_BUS_WIDTH_1)
949 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
951 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
952 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
954 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
955 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
957 err = __mmc_select_powerclass(card, ext_csd_bits);
959 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
960 mmc_hostname(host), 1 << bus_width, ddr);
966 * Set the bus speed for the selected speed mode.
968 static void mmc_set_bus_speed(struct mmc_card *card)
970 unsigned int max_dtr = (unsigned int)-1;
972 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
973 max_dtr > card->ext_csd.hs200_max_dtr)
974 max_dtr = card->ext_csd.hs200_max_dtr;
975 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
976 max_dtr = card->ext_csd.hs_max_dtr;
977 else if (max_dtr > card->csd.max_dtr)
978 max_dtr = card->csd.max_dtr;
980 mmc_set_clock(card->host, max_dtr);
984 * Select the bus width amoung 4-bit and 8-bit(SDR).
985 * If the bus width is changed successfully, return the selected width value.
986 * Zero is returned instead of error value if the wide width is not supported.
988 static int mmc_select_bus_width(struct mmc_card *card)
990 static unsigned ext_csd_bits[] = {
994 static unsigned bus_widths[] = {
998 struct mmc_host *host = card->host;
999 unsigned idx, bus_width = 0;
1002 if (!mmc_can_ext_csd(card) ||
1003 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1006 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1009 * Unlike SD, MMC cards dont have a configuration register to notify
1010 * supported bus width. So bus test command should be run to identify
1011 * the supported bus width or compare the ext csd values of current
1012 * bus width and ext csd values of 1 bit mode read earlier.
1014 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1016 * Host is capable of 8bit transfer, then switch
1017 * the device to work in 8bit transfer mode. If the
1018 * mmc switch command returns error then switch to
1019 * 4bit transfer mode. On success set the corresponding
1020 * bus width on the host.
1022 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1025 card->ext_csd.generic_cmd6_time);
1029 bus_width = bus_widths[idx];
1030 mmc_set_bus_width(host, bus_width);
1033 * If controller can't handle bus width test,
1034 * compare ext_csd previously read in 1 bit mode
1035 * against ext_csd at new bus width
1037 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1038 err = mmc_compare_ext_csds(card, bus_width);
1040 err = mmc_bus_test(card, bus_width);
1046 pr_warn("%s: switch to bus width %d failed\n",
1047 mmc_hostname(host), 1 << bus_width);
1055 * Switch to the high-speed mode
1057 static int mmc_select_hs(struct mmc_card *card)
1061 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1062 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1063 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1066 pr_warn("%s: switch to high-speed failed, err:%d\n",
1067 mmc_hostname(card->host), err);
1073 * Activate wide bus and DDR if supported.
1075 static int mmc_select_hs_ddr(struct mmc_card *card)
1077 struct mmc_host *host = card->host;
1078 u32 bus_width, ext_csd_bits;
1081 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1084 bus_width = host->ios.bus_width;
1085 if (bus_width == MMC_BUS_WIDTH_1)
1088 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1089 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1091 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1094 card->ext_csd.generic_cmd6_time,
1095 MMC_TIMING_MMC_DDR52,
1098 pr_err("%s: switch to bus width %d ddr failed\n",
1099 mmc_hostname(host), 1 << bus_width);
1104 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1107 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1109 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1110 * in the JEDEC spec for DDR.
1112 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1113 * host controller can support this, like some of the SDHCI
1114 * controller which connect to an eMMC device. Some of these
1115 * host controller still needs to use 1.8v vccq for supporting
1118 * So the sequence will be:
1119 * if (host and device can both support 1.2v IO)
1121 * else if (host and device can both support 1.8v IO)
1123 * so if host and device can only support 3.3v IO, this is the
1126 * WARNING: eMMC rules are NOT the same as SD DDR
1128 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1129 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1134 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1135 host->caps & MMC_CAP_1_8V_DDR)
1136 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1138 /* make sure vccq is 3.3v after switching disaster */
1140 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1145 static int mmc_select_hs400(struct mmc_card *card)
1147 struct mmc_host *host = card->host;
1148 unsigned int max_dtr;
1153 * HS400 mode requires 8-bit bus width
1155 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1156 host->ios.bus_width == MMC_BUS_WIDTH_8))
1159 /* Switch card to HS mode */
1160 val = EXT_CSD_TIMING_HS;
1161 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1162 EXT_CSD_HS_TIMING, val,
1163 card->ext_csd.generic_cmd6_time, 0,
1166 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1167 mmc_hostname(host), err);
1171 /* Prepare host to downgrade to HS timing */
1172 if (host->ops->hs400_downgrade)
1173 host->ops->hs400_downgrade(host);
1175 /* Set host controller to HS timing */
1176 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1178 /* Reduce frequency to HS frequency */
1179 max_dtr = card->ext_csd.hs_max_dtr;
1180 mmc_set_clock(host, max_dtr);
1182 err = mmc_switch_status(card, true);
1186 if (host->ops->hs400_prepare_ddr)
1187 host->ops->hs400_prepare_ddr(host);
1189 /* Switch card to DDR */
1190 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1192 EXT_CSD_DDR_BUS_WIDTH_8,
1193 card->ext_csd.generic_cmd6_time);
1195 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1196 mmc_hostname(host), err);
1200 /* Switch card to HS400 */
1201 val = EXT_CSD_TIMING_HS400 |
1202 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1203 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1204 EXT_CSD_HS_TIMING, val,
1205 card->ext_csd.generic_cmd6_time, 0,
1208 pr_err("%s: switch to hs400 failed, err:%d\n",
1209 mmc_hostname(host), err);
1213 /* Set host controller to HS400 timing and frequency */
1214 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1215 mmc_set_bus_speed(card);
1217 if (host->ops->hs400_complete)
1218 host->ops->hs400_complete(host);
1220 err = mmc_switch_status(card, true);
1227 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1232 int mmc_hs200_to_hs400(struct mmc_card *card)
1234 return mmc_select_hs400(card);
1237 int mmc_hs400_to_hs200(struct mmc_card *card)
1239 struct mmc_host *host = card->host;
1240 unsigned int max_dtr;
1244 /* Reduce frequency to HS */
1245 max_dtr = card->ext_csd.hs_max_dtr;
1246 mmc_set_clock(host, max_dtr);
1248 /* Switch HS400 to HS DDR */
1249 val = EXT_CSD_TIMING_HS;
1250 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1251 val, card->ext_csd.generic_cmd6_time, 0,
1256 if (host->ops->hs400_downgrade)
1257 host->ops->hs400_downgrade(host);
1259 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1261 err = mmc_switch_status(card, true);
1265 /* Switch HS DDR to HS */
1266 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1267 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1272 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1274 err = mmc_switch_status(card, true);
1278 /* Switch HS to HS200 */
1279 val = EXT_CSD_TIMING_HS200 |
1280 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1281 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1282 val, card->ext_csd.generic_cmd6_time, 0,
1287 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1290 * For HS200, CRC errors are not a reliable way to know the switch
1291 * failed. If there really is a problem, we would expect tuning will
1292 * fail and the result ends up the same.
1294 err = mmc_switch_status(card, false);
1298 mmc_set_bus_speed(card);
1300 /* Prepare tuning for HS400 mode. */
1301 if (host->ops->prepare_hs400_tuning)
1302 host->ops->prepare_hs400_tuning(host, &host->ios);
1307 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1312 static void mmc_select_driver_type(struct mmc_card *card)
1314 int card_drv_type, drive_strength, drv_type = 0;
1315 int fixed_drv_type = card->host->fixed_drv_type;
1317 card_drv_type = card->ext_csd.raw_driver_strength |
1318 mmc_driver_type_mask(0);
1320 if (fixed_drv_type >= 0)
1321 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1322 ? fixed_drv_type : 0;
1324 drive_strength = mmc_select_drive_strength(card,
1325 card->ext_csd.hs200_max_dtr,
1326 card_drv_type, &drv_type);
1328 card->drive_strength = drive_strength;
1331 mmc_set_driver_type(card->host, drv_type);
1334 static int mmc_select_hs400es(struct mmc_card *card)
1336 struct mmc_host *host = card->host;
1340 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1345 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1346 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1348 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1349 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1351 /* If fails try again during next card power cycle */
1355 err = mmc_select_bus_width(card);
1356 if (err != MMC_BUS_WIDTH_8) {
1357 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1358 mmc_hostname(host), err);
1359 err = err < 0 ? err : -ENOTSUPP;
1363 /* Switch card to HS mode */
1364 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1365 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1366 card->ext_csd.generic_cmd6_time, 0,
1369 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1370 mmc_hostname(host), err);
1374 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1375 err = mmc_switch_status(card, true);
1379 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1381 /* Switch card to DDR with strobe bit */
1382 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1383 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1386 card->ext_csd.generic_cmd6_time);
1388 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1389 mmc_hostname(host), err);
1393 mmc_select_driver_type(card);
1395 /* Switch card to HS400 */
1396 val = EXT_CSD_TIMING_HS400 |
1397 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1398 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1399 EXT_CSD_HS_TIMING, val,
1400 card->ext_csd.generic_cmd6_time, 0,
1403 pr_err("%s: switch to hs400es failed, err:%d\n",
1404 mmc_hostname(host), err);
1408 /* Set host controller to HS400 timing and frequency */
1409 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1411 /* Controller enable enhanced strobe function */
1412 host->ios.enhanced_strobe = true;
1413 if (host->ops->hs400_enhanced_strobe)
1414 host->ops->hs400_enhanced_strobe(host, &host->ios);
1416 err = mmc_switch_status(card, true);
1423 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1429 * For device supporting HS200 mode, the following sequence
1430 * should be done before executing the tuning process.
1431 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1432 * 2. switch to HS200 mode
1433 * 3. set the clock to > 52Mhz and <=200MHz
1435 static int mmc_select_hs200(struct mmc_card *card)
1437 struct mmc_host *host = card->host;
1438 unsigned int old_timing, old_signal_voltage;
1442 old_signal_voltage = host->ios.signal_voltage;
1443 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1444 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1446 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1447 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1449 /* If fails try again during next card power cycle */
1453 mmc_select_driver_type(card);
1456 * Set the bus width(4 or 8) with host's support and
1457 * switch to HS200 mode if bus width is set successfully.
1459 err = mmc_select_bus_width(card);
1461 val = EXT_CSD_TIMING_HS200 |
1462 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1463 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1464 EXT_CSD_HS_TIMING, val,
1465 card->ext_csd.generic_cmd6_time, 0,
1469 old_timing = host->ios.timing;
1470 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1473 * For HS200, CRC errors are not a reliable way to know the
1474 * switch failed. If there really is a problem, we would expect
1475 * tuning will fail and the result ends up the same.
1477 err = mmc_switch_status(card, false);
1480 * mmc_select_timing() assumes timing has not changed if
1481 * it is a switch error.
1483 if (err == -EBADMSG)
1484 mmc_set_timing(host, old_timing);
1488 /* fall back to the old signal voltage, if fails report error */
1489 if (mmc_set_signal_voltage(host, old_signal_voltage))
1492 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1499 * Activate High Speed, HS200 or HS400ES mode if supported.
1501 static int mmc_select_timing(struct mmc_card *card)
1505 if (!mmc_can_ext_csd(card))
1508 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1509 err = mmc_select_hs400es(card);
1510 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1511 err = mmc_select_hs200(card);
1512 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1513 err = mmc_select_hs(card);
1515 if (err && err != -EBADMSG)
1520 * Set the bus speed to the selected bus timing.
1521 * If timing is not selected, backward compatible is the default.
1523 mmc_set_bus_speed(card);
1528 * Execute tuning sequence to seek the proper bus operating
1529 * conditions for HS200 and HS400, which sends CMD21 to the device.
1531 static int mmc_hs200_tuning(struct mmc_card *card)
1533 struct mmc_host *host = card->host;
1536 * Timing should be adjusted to the HS400 target
1537 * operation frequency for tuning process
1539 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1540 host->ios.bus_width == MMC_BUS_WIDTH_8)
1541 if (host->ops->prepare_hs400_tuning)
1542 host->ops->prepare_hs400_tuning(host, &host->ios);
1544 return mmc_execute_tuning(card);
1548 * Handle the detection and initialisation of a card.
1550 * In the case of a resume, "oldcard" will contain the card
1551 * we're trying to reinitialise.
1553 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1554 struct mmc_card *oldcard)
1556 struct mmc_card *card;
1561 WARN_ON(!host->claimed);
1563 /* Set correct bus mode for MMC before attempting init */
1564 if (!mmc_host_is_spi(host))
1565 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1568 * Since we're changing the OCR value, we seem to
1569 * need to tell some cards to go back to the idle
1570 * state. We wait 1ms to give cards time to
1572 * mmc_go_idle is needed for eMMC that are asleep
1576 /* The extra bit indicates that we support high capacity */
1577 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1582 * For SPI, enable CRC as appropriate.
1584 if (mmc_host_is_spi(host)) {
1585 err = mmc_spi_set_crc(host, use_spi_crc);
1591 * Fetch CID from card.
1593 err = mmc_send_cid(host, cid);
1598 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1599 pr_debug("%s: Perhaps the card was replaced\n",
1600 mmc_hostname(host));
1608 * Allocate card structure.
1610 card = mmc_alloc_card(host, &mmc_type);
1612 err = PTR_ERR(card);
1617 card->type = MMC_TYPE_MMC;
1619 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1623 * Call the optional HC's init_card function to handle quirks.
1625 if (host->ops->init_card)
1626 host->ops->init_card(host, card);
1629 * For native busses: set card RCA and quit open drain mode.
1631 if (!mmc_host_is_spi(host)) {
1632 err = mmc_set_relative_addr(card);
1636 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1641 * Fetch CSD from card.
1643 err = mmc_send_csd(card, card->raw_csd);
1647 err = mmc_decode_csd(card);
1650 err = mmc_decode_cid(card);
1656 * handling only for cards supporting DSR and hosts requesting
1659 if (card->csd.dsr_imp && host->dsr_req)
1663 * Select card, as all following commands rely on that.
1665 if (!mmc_host_is_spi(host)) {
1666 err = mmc_select_card(card);
1672 /* Read extended CSD. */
1673 err = mmc_read_ext_csd(card);
1678 * If doing byte addressing, check if required to do sector
1679 * addressing. Handle the case of <2GB cards needing sector
1680 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1681 * ocr register has bit 30 set for sector addressing.
1684 mmc_card_set_blockaddr(card);
1686 /* Erase size depends on CSD and Extended CSD */
1687 mmc_set_erase_size(card);
1690 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1691 if (card->ext_csd.rev >= 3) {
1692 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1693 EXT_CSD_ERASE_GROUP_DEF, 1,
1694 card->ext_csd.generic_cmd6_time);
1696 if (err && err != -EBADMSG)
1701 * Just disable enhanced area off & sz
1702 * will try to enable ERASE_GROUP_DEF
1703 * during next time reinit
1705 card->ext_csd.enhanced_area_offset = -EINVAL;
1706 card->ext_csd.enhanced_area_size = -EINVAL;
1708 card->ext_csd.erase_group_def = 1;
1710 * enable ERASE_GRP_DEF successfully.
1711 * This will affect the erase size, so
1712 * here need to reset erase size
1714 mmc_set_erase_size(card);
1719 * Ensure eMMC user default partition is enabled
1721 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1722 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1723 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1724 card->ext_csd.part_config,
1725 card->ext_csd.part_time);
1726 if (err && err != -EBADMSG)
1731 * Enable power_off_notification byte in the ext_csd register
1733 if (card->ext_csd.rev >= 6) {
1734 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1735 EXT_CSD_POWER_OFF_NOTIFICATION,
1737 card->ext_csd.generic_cmd6_time);
1738 if (err && err != -EBADMSG)
1742 * The err can be -EBADMSG or 0,
1743 * so check for success and update the flag
1746 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1750 if (mmc_can_discard(card))
1751 card->erase_arg = MMC_DISCARD_ARG;
1752 else if (mmc_can_trim(card))
1753 card->erase_arg = MMC_TRIM_ARG;
1755 card->erase_arg = MMC_ERASE_ARG;
1758 * Select timing interface
1760 err = mmc_select_timing(card);
1764 if (mmc_card_hs200(card)) {
1765 host->doing_init_tune = 1;
1767 err = mmc_hs200_tuning(card);
1769 err = mmc_select_hs400(card);
1771 host->doing_init_tune = 0;
1776 } else if (!mmc_card_hs400es(card)) {
1777 /* Select the desired bus width optionally */
1778 err = mmc_select_bus_width(card);
1779 if (err > 0 && mmc_card_hs(card)) {
1780 err = mmc_select_hs_ddr(card);
1787 * Choose the power class with selected bus interface
1789 mmc_select_powerclass(card);
1792 * Enable HPI feature (if supported)
1794 if (card->ext_csd.hpi) {
1795 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1796 EXT_CSD_HPI_MGMT, 1,
1797 card->ext_csd.generic_cmd6_time);
1798 if (err && err != -EBADMSG)
1801 pr_warn("%s: Enabling HPI failed\n",
1802 mmc_hostname(card->host));
1803 card->ext_csd.hpi_en = 0;
1805 card->ext_csd.hpi_en = 1;
1810 * If cache size is higher than 0, this indicates the existence of cache
1811 * and it can be turned on. Note that some eMMCs from Micron has been
1812 * reported to need ~800 ms timeout, while enabling the cache after
1813 * sudden power failure tests. Let's extend the timeout to a minimum of
1814 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1816 if (card->ext_csd.cache_size > 0) {
1817 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1819 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1820 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1821 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1822 if (err && err != -EBADMSG)
1826 * Only if no error, cache is turned on successfully.
1829 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1830 mmc_hostname(card->host), err);
1831 card->ext_csd.cache_ctrl = 0;
1833 card->ext_csd.cache_ctrl = 1;
1838 * Enable Command Queue if supported. Note that Packed Commands cannot
1839 * be used with Command Queue.
1841 card->ext_csd.cmdq_en = false;
1842 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1843 err = mmc_cmdq_enable(card);
1844 if (err && err != -EBADMSG)
1847 pr_warn("%s: Enabling CMDQ failed\n",
1848 mmc_hostname(card->host));
1849 card->ext_csd.cmdq_support = false;
1850 card->ext_csd.cmdq_depth = 0;
1854 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1855 * disabled for a time, so a flag is needed to indicate to re-enable the
1858 card->reenable_cmdq = card->ext_csd.cmdq_en;
1860 if (host->cqe_ops && !host->cqe_enabled) {
1861 err = host->cqe_ops->cqe_enable(host, card);
1863 host->cqe_enabled = true;
1865 if (card->ext_csd.cmdq_en) {
1866 pr_info("%s: Command Queue Engine enabled\n",
1867 mmc_hostname(host));
1869 host->hsq_enabled = true;
1870 pr_info("%s: Host Software Queue enabled\n",
1871 mmc_hostname(host));
1876 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1877 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1878 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1879 mmc_hostname(host));
1891 mmc_remove_card(card);
1896 static int mmc_can_sleep(struct mmc_card *card)
1898 return card->ext_csd.rev >= 3;
1901 static int mmc_sleep(struct mmc_host *host)
1903 struct mmc_command cmd = {};
1904 struct mmc_card *card = host->card;
1905 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1908 /* Re-tuning can't be done once the card is deselected */
1909 mmc_retune_hold(host);
1911 err = mmc_deselect_cards(host);
1915 cmd.opcode = MMC_SLEEP_AWAKE;
1916 cmd.arg = card->rca << 16;
1920 * If the max_busy_timeout of the host is specified, validate it against
1921 * the sleep cmd timeout. A failure means we need to prevent the host
1922 * from doing hw busy detection, which is done by converting to a R1
1923 * response instead of a R1B. Note, some hosts requires R1B, which also
1924 * means they are on their own when it comes to deal with the busy
1927 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
1928 (timeout_ms > host->max_busy_timeout)) {
1929 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1931 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1932 cmd.busy_timeout = timeout_ms;
1935 err = mmc_wait_for_cmd(host, &cmd, 0);
1940 * If the host does not wait while the card signals busy, then we will
1941 * will have to wait the sleep/awake timeout. Note, we cannot use the
1942 * SEND_STATUS command to poll the status because that command (and most
1943 * others) is invalid while the card sleeps.
1945 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1946 mmc_delay(timeout_ms);
1949 mmc_retune_release(host);
1953 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1956 mmc_card_mmc(card) &&
1957 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1960 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1962 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1965 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1966 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1967 timeout = card->ext_csd.power_off_longtime;
1969 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1970 EXT_CSD_POWER_OFF_NOTIFICATION,
1971 notify_type, timeout, 0, false, false);
1973 pr_err("%s: Power Off Notification timed out, %u\n",
1974 mmc_hostname(card->host), timeout);
1976 /* Disable the power off notification after the switch operation. */
1977 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1983 * Host is being removed. Free up the current card.
1985 static void mmc_remove(struct mmc_host *host)
1987 mmc_remove_card(host->card);
1992 * Card detection - card is alive.
1994 static int mmc_alive(struct mmc_host *host)
1996 return mmc_send_status(host->card, NULL);
2000 * Card detection callback from host.
2002 static void mmc_detect(struct mmc_host *host)
2006 mmc_get_card(host->card, NULL);
2009 * Just check if our card has been removed.
2011 err = _mmc_detect_card_removed(host);
2013 mmc_put_card(host->card, NULL);
2018 mmc_claim_host(host);
2019 mmc_detach_bus(host);
2020 mmc_power_off(host);
2021 mmc_release_host(host);
2025 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2028 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2029 EXT_CSD_POWER_OFF_LONG;
2031 mmc_claim_host(host);
2033 if (mmc_card_suspended(host->card))
2036 err = mmc_flush_cache(host->card);
2040 if (mmc_can_poweroff_notify(host->card) &&
2041 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend ||
2042 (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND)))
2043 err = mmc_poweroff_notify(host->card, notify_type);
2044 else if (mmc_can_sleep(host->card))
2045 err = mmc_sleep(host);
2046 else if (!mmc_host_is_spi(host))
2047 err = mmc_deselect_cards(host);
2050 mmc_power_off(host);
2051 mmc_card_set_suspended(host->card);
2054 mmc_release_host(host);
2061 static int mmc_suspend(struct mmc_host *host)
2065 err = _mmc_suspend(host, true);
2067 pm_runtime_disable(&host->card->dev);
2068 pm_runtime_set_suspended(&host->card->dev);
2075 * This function tries to determine if the same card is still present
2076 * and, if so, restore all state to it.
2078 static int _mmc_resume(struct mmc_host *host)
2082 mmc_claim_host(host);
2084 if (!mmc_card_suspended(host->card))
2087 mmc_power_up(host, host->card->ocr);
2088 err = mmc_init_card(host, host->card->ocr, host->card);
2089 mmc_card_clr_suspended(host->card);
2092 mmc_release_host(host);
2099 static int mmc_shutdown(struct mmc_host *host)
2104 * In a specific case for poweroff notify, we need to resume the card
2105 * before we can shutdown it properly.
2107 if (mmc_can_poweroff_notify(host->card) &&
2108 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2109 err = _mmc_resume(host);
2112 err = _mmc_suspend(host, false);
2118 * Callback for resume.
2120 static int mmc_resume(struct mmc_host *host)
2122 pm_runtime_enable(&host->card->dev);
2127 * Callback for runtime_suspend.
2129 static int mmc_runtime_suspend(struct mmc_host *host)
2133 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2136 err = _mmc_suspend(host, true);
2138 pr_err("%s: error %d doing aggressive suspend\n",
2139 mmc_hostname(host), err);
2145 * Callback for runtime_resume.
2147 static int mmc_runtime_resume(struct mmc_host *host)
2151 err = _mmc_resume(host);
2152 if (err && err != -ENOMEDIUM)
2153 pr_err("%s: error %d doing runtime resume\n",
2154 mmc_hostname(host), err);
2159 static int mmc_can_reset(struct mmc_card *card)
2163 rst_n_function = card->ext_csd.rst_n_function;
2164 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2169 static int _mmc_hw_reset(struct mmc_host *host)
2171 struct mmc_card *card = host->card;
2174 * In the case of recovery, we can't expect flushing the cache to work
2175 * always, but we have a go and ignore errors.
2177 mmc_flush_cache(host->card);
2179 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2180 mmc_can_reset(card)) {
2181 /* If the card accept RST_n signal, send it. */
2182 mmc_set_clock(host, host->f_init);
2183 host->ops->hw_reset(host);
2184 /* Set initial state and call mmc_set_ios */
2185 mmc_set_initial_state(host);
2187 /* Do a brute force power cycle */
2188 mmc_power_cycle(host, card->ocr);
2189 mmc_pwrseq_reset(host);
2191 return mmc_init_card(host, card->ocr, card);
2194 static const struct mmc_bus_ops mmc_ops = {
2195 .remove = mmc_remove,
2196 .detect = mmc_detect,
2197 .suspend = mmc_suspend,
2198 .resume = mmc_resume,
2199 .runtime_suspend = mmc_runtime_suspend,
2200 .runtime_resume = mmc_runtime_resume,
2202 .shutdown = mmc_shutdown,
2203 .hw_reset = _mmc_hw_reset,
2207 * Starting point for MMC card init.
2209 int mmc_attach_mmc(struct mmc_host *host)
2214 WARN_ON(!host->claimed);
2216 /* Set correct bus mode for MMC before attempting attach */
2217 if (!mmc_host_is_spi(host))
2218 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2220 err = mmc_send_op_cond(host, 0, &ocr);
2224 mmc_attach_bus(host, &mmc_ops);
2225 if (host->ocr_avail_mmc)
2226 host->ocr_avail = host->ocr_avail_mmc;
2229 * We need to get OCR a different way for SPI.
2231 if (mmc_host_is_spi(host)) {
2232 err = mmc_spi_read_ocr(host, 1, &ocr);
2237 rocr = mmc_select_voltage(host, ocr);
2240 * Can we support the voltage of the card?
2248 * Detect and init the card.
2250 err = mmc_init_card(host, rocr, NULL);
2254 mmc_release_host(host);
2255 err = mmc_add_card(host->card);
2259 mmc_claim_host(host);
2263 mmc_remove_card(host->card);
2264 mmc_claim_host(host);
2267 mmc_detach_bus(host);
2269 pr_err("%s: error %d whilst initialising MMC card\n",
2270 mmc_hostname(host), err);