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>
15 #include <linux/random.h>
16 #include <linux/sysfs.h>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/mmc.h>
31 #define DEFAULT_CMD6_TIMEOUT_MS 500
32 #define MIN_CACHE_EN_TIMEOUT_MS 1600
33 #define CACHE_FLUSH_TIMEOUT_MS 30000 /* 30s */
35 static const unsigned int tran_exp[] = {
36 10000, 100000, 1000000, 10000000,
40 static const unsigned char tran_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
45 static const unsigned int taac_exp[] = {
46 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
49 static const unsigned int taac_mant[] = {
50 0, 10, 12, 13, 15, 20, 25, 30,
51 35, 40, 45, 50, 55, 60, 70, 80,
54 #define UNSTUFF_BITS(resp,start,size) \
56 const int __size = size; \
57 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
58 const int __off = 3 - ((start) / 32); \
59 const int __shft = (start) & 31; \
62 __res = resp[__off] >> __shft; \
63 if (__size + __shft > 32) \
64 __res |= resp[__off-1] << ((32 - __shft) % 32); \
69 * Given the decoded CSD structure, decode the raw CID to our CID structure.
71 static int mmc_decode_cid(struct mmc_card *card)
73 u32 *resp = card->raw_cid;
76 * Add the raw card ID (cid) data to the entropy pool. It doesn't
77 * matter that not all of it is unique, it's just bonus entropy.
79 add_device_randomness(&card->raw_cid, sizeof(card->raw_cid));
82 * The selection of the format here is based upon published
83 * specs from sandisk and from what people have reported.
85 switch (card->csd.mmca_vsn) {
86 case 0: /* MMC v1.0 - v1.2 */
87 case 1: /* MMC v1.4 */
88 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
89 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
90 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
91 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
92 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
93 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
94 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
95 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
96 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
97 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
98 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
99 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
100 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
103 case 2: /* MMC v2.0 - v2.2 */
104 case 3: /* MMC v3.1 - v3.3 */
106 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
107 card->cid.oemid = UNSTUFF_BITS(resp, 104, 8);
108 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
109 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
110 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
111 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
112 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
113 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
114 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
115 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
116 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
117 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
121 pr_err("%s: card has unknown MMCA version %d\n",
122 mmc_hostname(card->host), card->csd.mmca_vsn);
129 static void mmc_set_erase_size(struct mmc_card *card)
131 if (card->ext_csd.erase_group_def & 1)
132 card->erase_size = card->ext_csd.hc_erase_size;
134 card->erase_size = card->csd.erase_size;
136 mmc_init_erase(card);
140 * Given a 128-bit response, decode to our card CSD structure.
142 static int mmc_decode_csd(struct mmc_card *card)
144 struct mmc_csd *csd = &card->csd;
145 unsigned int e, m, a, b;
146 u32 *resp = card->raw_csd;
149 * We only understand CSD structure v1.1 and v1.2.
150 * v1.2 has extra information in bits 15, 11 and 10.
151 * We also support eMMC v4.4 & v4.41.
153 csd->structure = UNSTUFF_BITS(resp, 126, 2);
154 if (csd->structure == 0) {
155 pr_err("%s: unrecognised CSD structure version %d\n",
156 mmc_hostname(card->host), csd->structure);
160 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
161 m = UNSTUFF_BITS(resp, 115, 4);
162 e = UNSTUFF_BITS(resp, 112, 3);
163 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
164 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
166 m = UNSTUFF_BITS(resp, 99, 4);
167 e = UNSTUFF_BITS(resp, 96, 3);
168 csd->max_dtr = tran_exp[e] * tran_mant[m];
169 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
171 e = UNSTUFF_BITS(resp, 47, 3);
172 m = UNSTUFF_BITS(resp, 62, 12);
173 csd->capacity = (1 + m) << (e + 2);
175 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
176 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
177 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
178 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
179 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
180 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
181 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
182 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
184 if (csd->write_blkbits >= 9) {
185 a = UNSTUFF_BITS(resp, 42, 5);
186 b = UNSTUFF_BITS(resp, 37, 5);
187 csd->erase_size = (a + 1) * (b + 1);
188 csd->erase_size <<= csd->write_blkbits - 9;
194 static void mmc_select_card_type(struct mmc_card *card)
196 struct mmc_host *host = card->host;
197 u8 card_type = card->ext_csd.raw_card_type;
198 u32 caps = host->caps, caps2 = host->caps2;
199 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
200 unsigned int avail_type = 0;
202 if (caps & MMC_CAP_MMC_HIGHSPEED &&
203 card_type & EXT_CSD_CARD_TYPE_HS_26) {
204 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
205 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
208 if (caps & MMC_CAP_MMC_HIGHSPEED &&
209 card_type & EXT_CSD_CARD_TYPE_HS_52) {
210 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
211 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
214 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
215 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
216 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
217 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
220 if (caps & MMC_CAP_1_2V_DDR &&
221 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
222 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
223 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
226 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
227 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
228 hs200_max_dtr = MMC_HS200_MAX_DTR;
229 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
232 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
233 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
234 hs200_max_dtr = MMC_HS200_MAX_DTR;
235 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
238 if (caps2 & MMC_CAP2_HS400_1_8V &&
239 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
240 hs200_max_dtr = MMC_HS200_MAX_DTR;
241 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
244 if (caps2 & MMC_CAP2_HS400_1_2V &&
245 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
246 hs200_max_dtr = MMC_HS200_MAX_DTR;
247 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
250 if ((caps2 & MMC_CAP2_HS400_ES) &&
251 card->ext_csd.strobe_support &&
252 (avail_type & EXT_CSD_CARD_TYPE_HS400))
253 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
255 card->ext_csd.hs_max_dtr = hs_max_dtr;
256 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
257 card->mmc_avail_type = avail_type;
260 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
262 u8 hc_erase_grp_sz, hc_wp_grp_sz;
265 * Disable these attributes by default
267 card->ext_csd.enhanced_area_offset = -EINVAL;
268 card->ext_csd.enhanced_area_size = -EINVAL;
271 * Enhanced area feature support -- check whether the eMMC
272 * card has the Enhanced area enabled. If so, export enhanced
273 * area offset and size to user by adding sysfs interface.
275 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
276 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
277 if (card->ext_csd.partition_setting_completed) {
279 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
281 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
284 * calculate the enhanced data area offset, in bytes
286 card->ext_csd.enhanced_area_offset =
287 (((unsigned long long)ext_csd[139]) << 24) +
288 (((unsigned long long)ext_csd[138]) << 16) +
289 (((unsigned long long)ext_csd[137]) << 8) +
290 (((unsigned long long)ext_csd[136]));
291 if (mmc_card_blockaddr(card))
292 card->ext_csd.enhanced_area_offset <<= 9;
294 * calculate the enhanced data area size, in kilobytes
296 card->ext_csd.enhanced_area_size =
297 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
299 card->ext_csd.enhanced_area_size *=
300 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
301 card->ext_csd.enhanced_area_size <<= 9;
303 pr_warn("%s: defines enhanced area without partition setting complete\n",
304 mmc_hostname(card->host));
309 static void mmc_part_add(struct mmc_card *card, u64 size,
310 unsigned int part_cfg, char *name, int idx, bool ro,
313 card->part[card->nr_parts].size = size;
314 card->part[card->nr_parts].part_cfg = part_cfg;
315 sprintf(card->part[card->nr_parts].name, name, idx);
316 card->part[card->nr_parts].force_ro = ro;
317 card->part[card->nr_parts].area_type = area_type;
321 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
324 u8 hc_erase_grp_sz, hc_wp_grp_sz;
328 * General purpose partition feature support --
329 * If ext_csd has the size of general purpose partitions,
330 * set size, part_cfg, partition name in mmc_part.
332 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
333 EXT_CSD_PART_SUPPORT_PART_EN) {
335 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
337 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
339 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
340 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
341 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
342 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
344 if (card->ext_csd.partition_setting_completed == 0) {
345 pr_warn("%s: has partition size defined without partition complete\n",
346 mmc_hostname(card->host));
350 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
352 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
354 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
355 part_size *= (hc_erase_grp_sz * hc_wp_grp_sz);
356 mmc_part_add(card, part_size << 19,
357 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
359 MMC_BLK_DATA_AREA_GP);
364 /* Minimum partition switch timeout in milliseconds */
365 #define MMC_MIN_PART_SWITCH_TIME 300
368 * Decode extended CSD.
370 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
374 struct device_node *np;
375 bool broken_hpi = false;
377 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
378 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
379 if (card->csd.structure == 3) {
380 if (card->ext_csd.raw_ext_csd_structure > 2) {
381 pr_err("%s: unrecognised EXT_CSD structure "
382 "version %d\n", mmc_hostname(card->host),
383 card->ext_csd.raw_ext_csd_structure);
389 np = mmc_of_find_child_device(card->host, 0);
390 if (np && of_device_is_compatible(np, "mmc-card"))
391 broken_hpi = of_property_read_bool(np, "broken-hpi");
395 * The EXT_CSD format is meant to be forward compatible. As long
396 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
397 * are authorized, see JEDEC JESD84-B50 section B.8.
399 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
401 /* fixup device after ext_csd revision field is updated */
402 mmc_fixup_device(card, mmc_ext_csd_fixups);
404 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
405 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
406 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
407 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
408 if (card->ext_csd.rev >= 2) {
409 card->ext_csd.sectors =
410 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
411 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
412 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
413 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
415 /* Cards with density > 2GiB are sector addressed */
416 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
417 mmc_card_set_blockaddr(card);
420 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
421 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
423 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
424 card->ext_csd.raw_erase_timeout_mult =
425 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
426 card->ext_csd.raw_hc_erase_grp_size =
427 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
428 card->ext_csd.raw_boot_mult =
429 ext_csd[EXT_CSD_BOOT_MULT];
430 if (card->ext_csd.rev >= 3) {
431 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
432 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
434 /* EXT_CSD value is in units of 10ms, but we store in ms */
435 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
437 /* Sleep / awake timeout in 100ns units */
438 if (sa_shift > 0 && sa_shift <= 0x17)
439 card->ext_csd.sa_timeout =
440 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
441 card->ext_csd.erase_group_def =
442 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
443 card->ext_csd.hc_erase_timeout = 300 *
444 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
445 card->ext_csd.hc_erase_size =
446 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
448 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
451 * There are two boot regions of equal size, defined in
454 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
455 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
456 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
457 mmc_part_add(card, part_size,
458 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
460 MMC_BLK_DATA_AREA_BOOT);
465 card->ext_csd.raw_hc_erase_gap_size =
466 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
467 card->ext_csd.raw_sec_trim_mult =
468 ext_csd[EXT_CSD_SEC_TRIM_MULT];
469 card->ext_csd.raw_sec_erase_mult =
470 ext_csd[EXT_CSD_SEC_ERASE_MULT];
471 card->ext_csd.raw_sec_feature_support =
472 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
473 card->ext_csd.raw_trim_mult =
474 ext_csd[EXT_CSD_TRIM_MULT];
475 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
476 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
477 if (card->ext_csd.rev >= 4) {
478 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
479 EXT_CSD_PART_SETTING_COMPLETED)
480 card->ext_csd.partition_setting_completed = 1;
482 card->ext_csd.partition_setting_completed = 0;
484 mmc_manage_enhanced_area(card, ext_csd);
486 mmc_manage_gp_partitions(card, ext_csd);
488 card->ext_csd.sec_trim_mult =
489 ext_csd[EXT_CSD_SEC_TRIM_MULT];
490 card->ext_csd.sec_erase_mult =
491 ext_csd[EXT_CSD_SEC_ERASE_MULT];
492 card->ext_csd.sec_feature_support =
493 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
494 card->ext_csd.trim_timeout = 300 *
495 ext_csd[EXT_CSD_TRIM_MULT];
498 * Note that the call to mmc_part_add above defaults to read
499 * only. If this default assumption is changed, the call must
500 * take into account the value of boot_locked below.
502 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
503 card->ext_csd.boot_ro_lockable = true;
505 /* Save power class values */
506 card->ext_csd.raw_pwr_cl_52_195 =
507 ext_csd[EXT_CSD_PWR_CL_52_195];
508 card->ext_csd.raw_pwr_cl_26_195 =
509 ext_csd[EXT_CSD_PWR_CL_26_195];
510 card->ext_csd.raw_pwr_cl_52_360 =
511 ext_csd[EXT_CSD_PWR_CL_52_360];
512 card->ext_csd.raw_pwr_cl_26_360 =
513 ext_csd[EXT_CSD_PWR_CL_26_360];
514 card->ext_csd.raw_pwr_cl_200_195 =
515 ext_csd[EXT_CSD_PWR_CL_200_195];
516 card->ext_csd.raw_pwr_cl_200_360 =
517 ext_csd[EXT_CSD_PWR_CL_200_360];
518 card->ext_csd.raw_pwr_cl_ddr_52_195 =
519 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
520 card->ext_csd.raw_pwr_cl_ddr_52_360 =
521 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
522 card->ext_csd.raw_pwr_cl_ddr_200_360 =
523 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
526 if (card->ext_csd.rev >= 5) {
527 /* Adjust production date as per JEDEC JESD84-B451 */
528 if (card->cid.year < 2010)
529 card->cid.year += 16;
531 /* check whether the eMMC card supports BKOPS */
532 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
533 card->ext_csd.bkops = 1;
534 card->ext_csd.man_bkops_en =
535 (ext_csd[EXT_CSD_BKOPS_EN] &
536 EXT_CSD_MANUAL_BKOPS_MASK);
537 card->ext_csd.raw_bkops_status =
538 ext_csd[EXT_CSD_BKOPS_STATUS];
539 if (card->ext_csd.man_bkops_en)
540 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
541 mmc_hostname(card->host));
542 card->ext_csd.auto_bkops_en =
543 (ext_csd[EXT_CSD_BKOPS_EN] &
544 EXT_CSD_AUTO_BKOPS_MASK);
545 if (card->ext_csd.auto_bkops_en)
546 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
547 mmc_hostname(card->host));
550 /* check whether the eMMC card supports HPI */
551 if (!mmc_card_broken_hpi(card) &&
552 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
553 card->ext_csd.hpi = 1;
554 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
555 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
557 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
559 * Indicate the maximum timeout to close
560 * a command interrupted by HPI
562 card->ext_csd.out_of_int_time =
563 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
566 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
567 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
570 * RPMB regions are defined in multiples of 128K.
572 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
573 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
574 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
575 EXT_CSD_PART_CONFIG_ACC_RPMB,
577 MMC_BLK_DATA_AREA_RPMB);
581 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
582 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
583 card->erased_byte = 0xFF;
585 card->erased_byte = 0x0;
587 /* eMMC v4.5 or later */
588 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
589 if (card->ext_csd.rev >= 6) {
590 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
592 card->ext_csd.generic_cmd6_time = 10 *
593 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
594 card->ext_csd.power_off_longtime = 10 *
595 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
597 card->ext_csd.cache_size =
598 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
599 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
600 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
601 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
603 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
604 card->ext_csd.data_sector_size = 4096;
606 card->ext_csd.data_sector_size = 512;
608 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
609 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
610 card->ext_csd.data_tag_unit_size =
611 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
612 (card->ext_csd.data_sector_size);
614 card->ext_csd.data_tag_unit_size = 0;
617 card->ext_csd.max_packed_writes =
618 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
619 card->ext_csd.max_packed_reads =
620 ext_csd[EXT_CSD_MAX_PACKED_READS];
622 card->ext_csd.data_sector_size = 512;
626 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
627 * when accessing a specific field", so use it here if there is no
628 * PARTITION_SWITCH_TIME.
630 if (!card->ext_csd.part_time)
631 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
632 /* Some eMMC set the value too low so set a minimum */
633 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
634 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
636 /* eMMC v5 or later */
637 if (card->ext_csd.rev >= 7) {
638 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
640 card->ext_csd.ffu_capable =
641 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
642 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
644 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
645 card->ext_csd.device_life_time_est_typ_a =
646 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
647 card->ext_csd.device_life_time_est_typ_b =
648 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
651 /* eMMC v5.1 or later */
652 if (card->ext_csd.rev >= 8) {
653 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
654 EXT_CSD_CMDQ_SUPPORTED;
655 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
656 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
657 /* Exclude inefficiently small queue depths */
658 if (card->ext_csd.cmdq_depth <= 2) {
659 card->ext_csd.cmdq_support = false;
660 card->ext_csd.cmdq_depth = 0;
662 if (card->ext_csd.cmdq_support) {
663 pr_debug("%s: Command Queue supported depth %u\n",
664 mmc_hostname(card->host),
665 card->ext_csd.cmdq_depth);
667 card->ext_csd.enhanced_rpmb_supported =
668 (card->ext_csd.rel_param &
669 EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR);
675 static int mmc_read_ext_csd(struct mmc_card *card)
680 if (!mmc_can_ext_csd(card))
683 err = mmc_get_ext_csd(card, &ext_csd);
685 /* If the host or the card can't do the switch,
686 * fail more gracefully. */
693 * High capacity cards should have this "magic" size
694 * stored in their CSD.
696 if (card->csd.capacity == (4096 * 512)) {
697 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
698 mmc_hostname(card->host));
700 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
701 mmc_hostname(card->host));
708 err = mmc_decode_ext_csd(card, ext_csd);
713 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
718 if (bus_width == MMC_BUS_WIDTH_1)
721 err = mmc_get_ext_csd(card, &bw_ext_csd);
725 /* only compare read only fields */
726 err = !((card->ext_csd.raw_partition_support ==
727 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
728 (card->ext_csd.raw_erased_mem_count ==
729 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
730 (card->ext_csd.rev ==
731 bw_ext_csd[EXT_CSD_REV]) &&
732 (card->ext_csd.raw_ext_csd_structure ==
733 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
734 (card->ext_csd.raw_card_type ==
735 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
736 (card->ext_csd.raw_s_a_timeout ==
737 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
738 (card->ext_csd.raw_hc_erase_gap_size ==
739 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
740 (card->ext_csd.raw_erase_timeout_mult ==
741 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
742 (card->ext_csd.raw_hc_erase_grp_size ==
743 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
744 (card->ext_csd.raw_sec_trim_mult ==
745 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
746 (card->ext_csd.raw_sec_erase_mult ==
747 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
748 (card->ext_csd.raw_sec_feature_support ==
749 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
750 (card->ext_csd.raw_trim_mult ==
751 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
752 (card->ext_csd.raw_sectors[0] ==
753 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
754 (card->ext_csd.raw_sectors[1] ==
755 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
756 (card->ext_csd.raw_sectors[2] ==
757 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
758 (card->ext_csd.raw_sectors[3] ==
759 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
760 (card->ext_csd.raw_pwr_cl_52_195 ==
761 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
762 (card->ext_csd.raw_pwr_cl_26_195 ==
763 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
764 (card->ext_csd.raw_pwr_cl_52_360 ==
765 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
766 (card->ext_csd.raw_pwr_cl_26_360 ==
767 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
768 (card->ext_csd.raw_pwr_cl_200_195 ==
769 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
770 (card->ext_csd.raw_pwr_cl_200_360 ==
771 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
772 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
773 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
774 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
775 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
776 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
777 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
786 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
787 card->raw_cid[2], card->raw_cid[3]);
788 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
789 card->raw_csd[2], card->raw_csd[3]);
790 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
791 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
792 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
793 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
794 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
795 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
796 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
797 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
798 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
799 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
800 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
801 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
802 card->ext_csd.device_life_time_est_typ_a,
803 card->ext_csd.device_life_time_est_typ_b);
804 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
805 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
806 card->ext_csd.enhanced_area_offset);
807 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
808 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
809 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n",
810 card->ext_csd.enhanced_rpmb_supported);
811 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
812 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
813 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
814 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
816 static ssize_t mmc_fwrev_show(struct device *dev,
817 struct device_attribute *attr,
820 struct mmc_card *card = mmc_dev_to_card(dev);
822 if (card->ext_csd.rev < 7)
823 return sysfs_emit(buf, "0x%x\n", card->cid.fwrev);
825 return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
826 card->ext_csd.fwrev);
829 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
831 static ssize_t mmc_dsr_show(struct device *dev,
832 struct device_attribute *attr,
835 struct mmc_card *card = mmc_dev_to_card(dev);
836 struct mmc_host *host = card->host;
838 if (card->csd.dsr_imp && host->dsr_req)
839 return sysfs_emit(buf, "0x%x\n", host->dsr);
841 /* return default DSR value */
842 return sysfs_emit(buf, "0x%x\n", 0x404);
845 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
847 static struct attribute *mmc_std_attrs[] = {
851 &dev_attr_erase_size.attr,
852 &dev_attr_preferred_erase_size.attr,
853 &dev_attr_fwrev.attr,
854 &dev_attr_ffu_capable.attr,
855 &dev_attr_hwrev.attr,
856 &dev_attr_manfid.attr,
858 &dev_attr_oemid.attr,
861 &dev_attr_pre_eol_info.attr,
862 &dev_attr_life_time.attr,
863 &dev_attr_serial.attr,
864 &dev_attr_enhanced_area_offset.attr,
865 &dev_attr_enhanced_area_size.attr,
866 &dev_attr_raw_rpmb_size_mult.attr,
867 &dev_attr_enhanced_rpmb_supported.attr,
868 &dev_attr_rel_sectors.attr,
872 &dev_attr_cmdq_en.attr,
875 ATTRIBUTE_GROUPS(mmc_std);
877 static struct device_type mmc_type = {
878 .groups = mmc_std_groups,
882 * Select the PowerClass for the current bus width
883 * If power class is defined for 4/8 bit bus in the
884 * extended CSD register, select it by executing the
885 * mmc_switch command.
887 static int __mmc_select_powerclass(struct mmc_card *card,
888 unsigned int bus_width)
890 struct mmc_host *host = card->host;
891 struct mmc_ext_csd *ext_csd = &card->ext_csd;
892 unsigned int pwrclass_val = 0;
895 switch (1 << host->ios.vdd) {
896 case MMC_VDD_165_195:
897 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
898 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
899 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
900 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
901 ext_csd->raw_pwr_cl_52_195 :
902 ext_csd->raw_pwr_cl_ddr_52_195;
903 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
904 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
915 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
916 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
917 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
918 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
919 ext_csd->raw_pwr_cl_52_360 :
920 ext_csd->raw_pwr_cl_ddr_52_360;
921 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
922 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
923 ext_csd->raw_pwr_cl_ddr_200_360 :
924 ext_csd->raw_pwr_cl_200_360;
927 pr_warn("%s: Voltage range not supported for power class\n",
932 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
933 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
934 EXT_CSD_PWR_CL_8BIT_SHIFT;
936 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
937 EXT_CSD_PWR_CL_4BIT_SHIFT;
939 /* If the power class is different from the default value */
940 if (pwrclass_val > 0) {
941 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
944 card->ext_csd.generic_cmd6_time);
950 static int mmc_select_powerclass(struct mmc_card *card)
952 struct mmc_host *host = card->host;
953 u32 bus_width, ext_csd_bits;
956 /* Power class selection is supported for versions >= 4.0 */
957 if (!mmc_can_ext_csd(card))
960 bus_width = host->ios.bus_width;
961 /* Power class values are defined only for 4/8 bit bus */
962 if (bus_width == MMC_BUS_WIDTH_1)
965 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
967 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
968 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
970 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
971 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
973 err = __mmc_select_powerclass(card, ext_csd_bits);
975 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
976 mmc_hostname(host), 1 << bus_width, ddr);
982 * Set the bus speed for the selected speed mode.
984 static void mmc_set_bus_speed(struct mmc_card *card)
986 unsigned int max_dtr = (unsigned int)-1;
988 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
989 max_dtr > card->ext_csd.hs200_max_dtr)
990 max_dtr = card->ext_csd.hs200_max_dtr;
991 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
992 max_dtr = card->ext_csd.hs_max_dtr;
993 else if (max_dtr > card->csd.max_dtr)
994 max_dtr = card->csd.max_dtr;
996 mmc_set_clock(card->host, max_dtr);
1000 * Select the bus width amoung 4-bit and 8-bit(SDR).
1001 * If the bus width is changed successfully, return the selected width value.
1002 * Zero is returned instead of error value if the wide width is not supported.
1004 static int mmc_select_bus_width(struct mmc_card *card)
1006 static unsigned ext_csd_bits[] = {
1007 EXT_CSD_BUS_WIDTH_8,
1008 EXT_CSD_BUS_WIDTH_4,
1010 static unsigned bus_widths[] = {
1014 struct mmc_host *host = card->host;
1015 unsigned idx, bus_width = 0;
1018 if (!mmc_can_ext_csd(card) ||
1019 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1022 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1025 * Unlike SD, MMC cards dont have a configuration register to notify
1026 * supported bus width. So bus test command should be run to identify
1027 * the supported bus width or compare the ext csd values of current
1028 * bus width and ext csd values of 1 bit mode read earlier.
1030 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1032 * Host is capable of 8bit transfer, then switch
1033 * the device to work in 8bit transfer mode. If the
1034 * mmc switch command returns error then switch to
1035 * 4bit transfer mode. On success set the corresponding
1036 * bus width on the host.
1038 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1041 card->ext_csd.generic_cmd6_time);
1045 bus_width = bus_widths[idx];
1046 mmc_set_bus_width(host, bus_width);
1049 * If controller can't handle bus width test,
1050 * compare ext_csd previously read in 1 bit mode
1051 * against ext_csd at new bus width
1053 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1054 err = mmc_compare_ext_csds(card, bus_width);
1056 err = mmc_bus_test(card, bus_width);
1062 pr_warn("%s: switch to bus width %d failed\n",
1063 mmc_hostname(host), 1 << bus_width);
1071 * Switch to the high-speed mode
1073 static int mmc_select_hs(struct mmc_card *card)
1077 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1078 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1079 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1080 true, true, MMC_CMD_RETRIES);
1082 pr_warn("%s: switch to high-speed failed, err:%d\n",
1083 mmc_hostname(card->host), err);
1089 * Activate wide bus and DDR if supported.
1091 static int mmc_select_hs_ddr(struct mmc_card *card)
1093 struct mmc_host *host = card->host;
1094 u32 bus_width, ext_csd_bits;
1097 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1100 bus_width = host->ios.bus_width;
1101 if (bus_width == MMC_BUS_WIDTH_1)
1104 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1105 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1107 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1110 card->ext_csd.generic_cmd6_time,
1111 MMC_TIMING_MMC_DDR52,
1112 true, true, MMC_CMD_RETRIES);
1114 pr_err("%s: switch to bus width %d ddr failed\n",
1115 mmc_hostname(host), 1 << bus_width);
1120 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1123 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1125 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1126 * in the JEDEC spec for DDR.
1128 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1129 * host controller can support this, like some of the SDHCI
1130 * controller which connect to an eMMC device. Some of these
1131 * host controller still needs to use 1.8v vccq for supporting
1134 * So the sequence will be:
1135 * if (host and device can both support 1.2v IO)
1137 * else if (host and device can both support 1.8v IO)
1139 * so if host and device can only support 3.3v IO, this is the
1142 * WARNING: eMMC rules are NOT the same as SD DDR
1144 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1145 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1150 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1151 host->caps & MMC_CAP_1_8V_DDR)
1152 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1154 /* make sure vccq is 3.3v after switching disaster */
1156 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1161 static int mmc_select_hs400(struct mmc_card *card)
1163 struct mmc_host *host = card->host;
1164 unsigned int max_dtr;
1169 * HS400 mode requires 8-bit bus width
1171 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1172 host->ios.bus_width == MMC_BUS_WIDTH_8))
1175 /* Switch card to HS mode */
1176 val = EXT_CSD_TIMING_HS;
1177 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1178 EXT_CSD_HS_TIMING, val,
1179 card->ext_csd.generic_cmd6_time, 0,
1180 false, true, MMC_CMD_RETRIES);
1182 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1183 mmc_hostname(host), err);
1187 /* Prepare host to downgrade to HS timing */
1188 if (host->ops->hs400_downgrade)
1189 host->ops->hs400_downgrade(host);
1191 /* Set host controller to HS timing */
1192 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1194 /* Reduce frequency to HS frequency */
1195 max_dtr = card->ext_csd.hs_max_dtr;
1196 mmc_set_clock(host, max_dtr);
1198 err = mmc_switch_status(card, true);
1202 if (host->ops->hs400_prepare_ddr)
1203 host->ops->hs400_prepare_ddr(host);
1205 /* Switch card to DDR */
1206 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1208 EXT_CSD_DDR_BUS_WIDTH_8,
1209 card->ext_csd.generic_cmd6_time);
1211 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1212 mmc_hostname(host), err);
1216 /* Switch card to HS400 */
1217 val = EXT_CSD_TIMING_HS400 |
1218 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1219 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1220 EXT_CSD_HS_TIMING, val,
1221 card->ext_csd.generic_cmd6_time, 0,
1222 false, true, MMC_CMD_RETRIES);
1224 pr_err("%s: switch to hs400 failed, err:%d\n",
1225 mmc_hostname(host), err);
1229 /* Set host controller to HS400 timing and frequency */
1230 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1231 mmc_set_bus_speed(card);
1233 if (host->ops->execute_hs400_tuning) {
1234 mmc_retune_disable(host);
1235 err = host->ops->execute_hs400_tuning(host, card);
1236 mmc_retune_enable(host);
1241 if (host->ops->hs400_complete)
1242 host->ops->hs400_complete(host);
1244 err = mmc_switch_status(card, true);
1251 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1256 int mmc_hs200_to_hs400(struct mmc_card *card)
1258 return mmc_select_hs400(card);
1261 int mmc_hs400_to_hs200(struct mmc_card *card)
1263 struct mmc_host *host = card->host;
1264 unsigned int max_dtr;
1268 /* Reduce frequency to HS */
1269 max_dtr = card->ext_csd.hs_max_dtr;
1270 mmc_set_clock(host, max_dtr);
1272 /* Switch HS400 to HS DDR */
1273 val = EXT_CSD_TIMING_HS;
1274 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1275 val, card->ext_csd.generic_cmd6_time, 0,
1276 false, true, MMC_CMD_RETRIES);
1280 if (host->ops->hs400_downgrade)
1281 host->ops->hs400_downgrade(host);
1283 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1285 err = mmc_switch_status(card, true);
1289 /* Switch HS DDR to HS */
1290 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1291 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1292 0, false, true, MMC_CMD_RETRIES);
1296 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1298 err = mmc_switch_status(card, true);
1302 /* Switch HS to HS200 */
1303 val = EXT_CSD_TIMING_HS200 |
1304 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1305 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1306 val, card->ext_csd.generic_cmd6_time, 0,
1307 false, true, MMC_CMD_RETRIES);
1311 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1314 * For HS200, CRC errors are not a reliable way to know the switch
1315 * failed. If there really is a problem, we would expect tuning will
1316 * fail and the result ends up the same.
1318 err = mmc_switch_status(card, false);
1322 mmc_set_bus_speed(card);
1324 /* Prepare tuning for HS400 mode. */
1325 if (host->ops->prepare_hs400_tuning)
1326 host->ops->prepare_hs400_tuning(host, &host->ios);
1331 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1336 static void mmc_select_driver_type(struct mmc_card *card)
1338 int card_drv_type, drive_strength, drv_type = 0;
1339 int fixed_drv_type = card->host->fixed_drv_type;
1341 card_drv_type = card->ext_csd.raw_driver_strength |
1342 mmc_driver_type_mask(0);
1344 if (fixed_drv_type >= 0)
1345 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1346 ? fixed_drv_type : 0;
1348 drive_strength = mmc_select_drive_strength(card,
1349 card->ext_csd.hs200_max_dtr,
1350 card_drv_type, &drv_type);
1352 card->drive_strength = drive_strength;
1355 mmc_set_driver_type(card->host, drv_type);
1358 static int mmc_select_hs400es(struct mmc_card *card)
1360 struct mmc_host *host = card->host;
1364 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1365 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1367 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1368 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1370 /* If fails try again during next card power cycle */
1374 err = mmc_select_bus_width(card);
1375 if (err != MMC_BUS_WIDTH_8) {
1376 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1377 mmc_hostname(host), err);
1378 err = err < 0 ? err : -ENOTSUPP;
1382 /* Switch card to HS mode */
1383 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1384 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1385 card->ext_csd.generic_cmd6_time, 0,
1386 false, true, MMC_CMD_RETRIES);
1388 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1389 mmc_hostname(host), err);
1394 * Bump to HS timing and frequency. Some cards don't handle
1395 * SEND_STATUS reliably at the initial frequency.
1397 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1398 mmc_set_bus_speed(card);
1400 err = mmc_switch_status(card, true);
1404 /* Switch card to DDR with strobe bit */
1405 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1406 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1409 card->ext_csd.generic_cmd6_time);
1411 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1412 mmc_hostname(host), err);
1416 mmc_select_driver_type(card);
1418 /* Switch card to HS400 */
1419 val = EXT_CSD_TIMING_HS400 |
1420 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1421 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1422 EXT_CSD_HS_TIMING, val,
1423 card->ext_csd.generic_cmd6_time, 0,
1424 false, true, MMC_CMD_RETRIES);
1426 pr_err("%s: switch to hs400es failed, err:%d\n",
1427 mmc_hostname(host), err);
1431 /* Set host controller to HS400 timing and frequency */
1432 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1434 /* Controller enable enhanced strobe function */
1435 host->ios.enhanced_strobe = true;
1436 if (host->ops->hs400_enhanced_strobe)
1437 host->ops->hs400_enhanced_strobe(host, &host->ios);
1439 err = mmc_switch_status(card, true);
1446 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1452 * For device supporting HS200 mode, the following sequence
1453 * should be done before executing the tuning process.
1454 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1455 * 2. switch to HS200 mode
1456 * 3. set the clock to > 52Mhz and <=200MHz
1458 static int mmc_select_hs200(struct mmc_card *card)
1460 struct mmc_host *host = card->host;
1461 unsigned int old_timing, old_signal_voltage, old_clock;
1465 old_signal_voltage = host->ios.signal_voltage;
1466 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1467 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1469 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1470 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1472 /* If fails try again during next card power cycle */
1476 mmc_select_driver_type(card);
1479 * Set the bus width(4 or 8) with host's support and
1480 * switch to HS200 mode if bus width is set successfully.
1482 err = mmc_select_bus_width(card);
1484 val = EXT_CSD_TIMING_HS200 |
1485 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1486 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1487 EXT_CSD_HS_TIMING, val,
1488 card->ext_csd.generic_cmd6_time, 0,
1489 false, true, MMC_CMD_RETRIES);
1494 * Bump to HS timing and frequency. Some cards don't handle
1495 * SEND_STATUS reliably at the initial frequency.
1496 * NB: We can't move to full (HS200) speeds until after we've
1497 * successfully switched over.
1499 old_timing = host->ios.timing;
1500 old_clock = host->ios.clock;
1501 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1502 mmc_set_clock(card->host, card->ext_csd.hs_max_dtr);
1505 * For HS200, CRC errors are not a reliable way to know the
1506 * switch failed. If there really is a problem, we would expect
1507 * tuning will fail and the result ends up the same.
1509 err = mmc_switch_status(card, false);
1512 * mmc_select_timing() assumes timing has not changed if
1513 * it is a switch error.
1515 if (err == -EBADMSG) {
1516 mmc_set_clock(host, old_clock);
1517 mmc_set_timing(host, old_timing);
1522 /* fall back to the old signal voltage, if fails report error */
1523 if (mmc_set_signal_voltage(host, old_signal_voltage))
1526 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1533 * Activate High Speed, HS200 or HS400ES mode if supported.
1535 static int mmc_select_timing(struct mmc_card *card)
1539 if (!mmc_can_ext_csd(card))
1542 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
1543 err = mmc_select_hs400es(card);
1547 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) {
1548 err = mmc_select_hs200(card);
1549 if (err == -EBADMSG)
1550 card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200;
1555 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1556 err = mmc_select_hs(card);
1559 if (err && err != -EBADMSG)
1564 * Set the bus speed to the selected bus timing.
1565 * If timing is not selected, backward compatible is the default.
1567 mmc_set_bus_speed(card);
1572 * Execute tuning sequence to seek the proper bus operating
1573 * conditions for HS200 and HS400, which sends CMD21 to the device.
1575 static int mmc_hs200_tuning(struct mmc_card *card)
1577 struct mmc_host *host = card->host;
1580 * Timing should be adjusted to the HS400 target
1581 * operation frequency for tuning process
1583 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1584 host->ios.bus_width == MMC_BUS_WIDTH_8)
1585 if (host->ops->prepare_hs400_tuning)
1586 host->ops->prepare_hs400_tuning(host, &host->ios);
1588 return mmc_execute_tuning(card);
1592 * Handle the detection and initialisation of a card.
1594 * In the case of a resume, "oldcard" will contain the card
1595 * we're trying to reinitialise.
1597 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1598 struct mmc_card *oldcard)
1600 struct mmc_card *card;
1605 WARN_ON(!host->claimed);
1607 /* Set correct bus mode for MMC before attempting init */
1608 if (!mmc_host_is_spi(host))
1609 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1612 * Since we're changing the OCR value, we seem to
1613 * need to tell some cards to go back to the idle
1614 * state. We wait 1ms to give cards time to
1616 * mmc_go_idle is needed for eMMC that are asleep
1620 /* The extra bit indicates that we support high capacity */
1621 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1626 * For SPI, enable CRC as appropriate.
1628 if (mmc_host_is_spi(host)) {
1629 err = mmc_spi_set_crc(host, use_spi_crc);
1635 * Fetch CID from card.
1637 err = mmc_send_cid(host, cid);
1642 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1643 pr_debug("%s: Perhaps the card was replaced\n",
1644 mmc_hostname(host));
1652 * Allocate card structure.
1654 card = mmc_alloc_card(host, &mmc_type);
1656 err = PTR_ERR(card);
1661 card->type = MMC_TYPE_MMC;
1663 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1667 * Call the optional HC's init_card function to handle quirks.
1669 if (host->ops->init_card)
1670 host->ops->init_card(host, card);
1673 * For native busses: set card RCA and quit open drain mode.
1675 if (!mmc_host_is_spi(host)) {
1676 err = mmc_set_relative_addr(card);
1680 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1685 * Fetch CSD from card.
1687 err = mmc_send_csd(card, card->raw_csd);
1691 err = mmc_decode_csd(card);
1694 err = mmc_decode_cid(card);
1700 * handling only for cards supporting DSR and hosts requesting
1703 if (card->csd.dsr_imp && host->dsr_req)
1707 * Select card, as all following commands rely on that.
1709 if (!mmc_host_is_spi(host)) {
1710 err = mmc_select_card(card);
1716 /* Read extended CSD. */
1717 err = mmc_read_ext_csd(card);
1722 * If doing byte addressing, check if required to do sector
1723 * addressing. Handle the case of <2GB cards needing sector
1724 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1725 * ocr register has bit 30 set for sector addressing.
1728 mmc_card_set_blockaddr(card);
1730 /* Erase size depends on CSD and Extended CSD */
1731 mmc_set_erase_size(card);
1735 * Reselect the card type since host caps could have been changed when
1736 * debugging even if the card is not new.
1738 mmc_select_card_type(card);
1740 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1741 if (card->ext_csd.rev >= 3) {
1742 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1743 EXT_CSD_ERASE_GROUP_DEF, 1,
1744 card->ext_csd.generic_cmd6_time);
1746 if (err && err != -EBADMSG)
1751 * Just disable enhanced area off & sz
1752 * will try to enable ERASE_GROUP_DEF
1753 * during next time reinit
1755 card->ext_csd.enhanced_area_offset = -EINVAL;
1756 card->ext_csd.enhanced_area_size = -EINVAL;
1758 card->ext_csd.erase_group_def = 1;
1760 * enable ERASE_GRP_DEF successfully.
1761 * This will affect the erase size, so
1762 * here need to reset erase size
1764 mmc_set_erase_size(card);
1769 * Ensure eMMC user default partition is enabled
1771 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1772 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1773 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1774 card->ext_csd.part_config,
1775 card->ext_csd.part_time);
1776 if (err && err != -EBADMSG)
1781 * Enable power_off_notification byte in the ext_csd register
1783 if (card->ext_csd.rev >= 6) {
1784 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1785 EXT_CSD_POWER_OFF_NOTIFICATION,
1787 card->ext_csd.generic_cmd6_time);
1788 if (err && err != -EBADMSG)
1792 * The err can be -EBADMSG or 0,
1793 * so check for success and update the flag
1796 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1800 if (mmc_can_discard(card))
1801 card->erase_arg = MMC_DISCARD_ARG;
1802 else if (mmc_can_trim(card))
1803 card->erase_arg = MMC_TRIM_ARG;
1805 card->erase_arg = MMC_ERASE_ARG;
1808 * Select timing interface
1810 err = mmc_select_timing(card);
1814 if (mmc_card_hs200(card)) {
1815 host->doing_init_tune = 1;
1817 err = mmc_hs200_tuning(card);
1819 err = mmc_select_hs400(card);
1821 host->doing_init_tune = 0;
1826 } else if (!mmc_card_hs400es(card)) {
1827 /* Select the desired bus width optionally */
1828 err = mmc_select_bus_width(card);
1829 if (err > 0 && mmc_card_hs(card)) {
1830 err = mmc_select_hs_ddr(card);
1837 * Choose the power class with selected bus interface
1839 mmc_select_powerclass(card);
1842 * Enable HPI feature (if supported)
1844 if (card->ext_csd.hpi) {
1845 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1846 EXT_CSD_HPI_MGMT, 1,
1847 card->ext_csd.generic_cmd6_time);
1848 if (err && err != -EBADMSG)
1851 pr_warn("%s: Enabling HPI failed\n",
1852 mmc_hostname(card->host));
1853 card->ext_csd.hpi_en = 0;
1855 card->ext_csd.hpi_en = 1;
1860 * If cache size is higher than 0, this indicates the existence of cache
1861 * and it can be turned on. Note that some eMMCs from Micron has been
1862 * reported to need ~800 ms timeout, while enabling the cache after
1863 * sudden power failure tests. Let's extend the timeout to a minimum of
1864 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1866 if (card->ext_csd.cache_size > 0) {
1867 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1869 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1870 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1871 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1872 if (err && err != -EBADMSG)
1876 * Only if no error, cache is turned on successfully.
1879 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1880 mmc_hostname(card->host), err);
1881 card->ext_csd.cache_ctrl = 0;
1883 card->ext_csd.cache_ctrl = 1;
1888 * Enable Command Queue if supported. Note that Packed Commands cannot
1889 * be used with Command Queue.
1891 card->ext_csd.cmdq_en = false;
1892 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1893 err = mmc_cmdq_enable(card);
1894 if (err && err != -EBADMSG)
1897 pr_warn("%s: Enabling CMDQ failed\n",
1898 mmc_hostname(card->host));
1899 card->ext_csd.cmdq_support = false;
1900 card->ext_csd.cmdq_depth = 0;
1904 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1905 * disabled for a time, so a flag is needed to indicate to re-enable the
1908 card->reenable_cmdq = card->ext_csd.cmdq_en;
1910 if (host->cqe_ops && !host->cqe_enabled) {
1911 err = host->cqe_ops->cqe_enable(host, card);
1913 host->cqe_enabled = true;
1915 if (card->ext_csd.cmdq_en) {
1916 pr_info("%s: Command Queue Engine enabled\n",
1917 mmc_hostname(host));
1919 host->hsq_enabled = true;
1920 pr_info("%s: Host Software Queue enabled\n",
1921 mmc_hostname(host));
1926 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1927 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1928 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1929 mmc_hostname(host));
1941 mmc_remove_card(card);
1946 static int mmc_can_sleep(struct mmc_card *card)
1948 return card->ext_csd.rev >= 3;
1951 static int mmc_sleep_busy_cb(void *cb_data, bool *busy)
1953 struct mmc_host *host = cb_data;
1955 *busy = host->ops->card_busy(host);
1959 static int mmc_sleep(struct mmc_host *host)
1961 struct mmc_command cmd = {};
1962 struct mmc_card *card = host->card;
1963 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1967 /* Re-tuning can't be done once the card is deselected */
1968 mmc_retune_hold(host);
1970 err = mmc_deselect_cards(host);
1974 cmd.opcode = MMC_SLEEP_AWAKE;
1975 cmd.arg = card->rca << 16;
1977 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
1979 err = mmc_wait_for_cmd(host, &cmd, 0);
1984 * If the host does not wait while the card signals busy, then we can
1985 * try to poll, but only if the host supports HW polling, as the
1986 * SEND_STATUS cmd is not allowed. If we can't poll, then we simply need
1987 * to wait the sleep/awake timeout.
1989 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
1992 if (!host->ops->card_busy) {
1993 mmc_delay(timeout_ms);
1997 err = __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_sleep_busy_cb, host);
2000 mmc_retune_release(host);
2004 static int mmc_can_poweroff_notify(const struct mmc_card *card)
2007 mmc_card_mmc(card) &&
2008 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
2011 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
2013 unsigned int timeout = card->ext_csd.generic_cmd6_time;
2016 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
2017 if (notify_type == EXT_CSD_POWER_OFF_LONG)
2018 timeout = card->ext_csd.power_off_longtime;
2020 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
2021 EXT_CSD_POWER_OFF_NOTIFICATION,
2022 notify_type, timeout, 0, false, false, MMC_CMD_RETRIES);
2024 pr_err("%s: Power Off Notification timed out, %u\n",
2025 mmc_hostname(card->host), timeout);
2027 /* Disable the power off notification after the switch operation. */
2028 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
2034 * Host is being removed. Free up the current card.
2036 static void mmc_remove(struct mmc_host *host)
2038 mmc_remove_card(host->card);
2043 * Card detection - card is alive.
2045 static int mmc_alive(struct mmc_host *host)
2047 return mmc_send_status(host->card, NULL);
2051 * Card detection callback from host.
2053 static void mmc_detect(struct mmc_host *host)
2057 mmc_get_card(host->card, NULL);
2060 * Just check if our card has been removed.
2062 err = _mmc_detect_card_removed(host);
2064 mmc_put_card(host->card, NULL);
2069 mmc_claim_host(host);
2070 mmc_detach_bus(host);
2071 mmc_power_off(host);
2072 mmc_release_host(host);
2076 static bool _mmc_cache_enabled(struct mmc_host *host)
2078 return host->card->ext_csd.cache_size > 0 &&
2079 host->card->ext_csd.cache_ctrl & 1;
2083 * Flush the internal cache of the eMMC to non-volatile storage.
2085 static int _mmc_flush_cache(struct mmc_host *host)
2089 if (_mmc_cache_enabled(host)) {
2090 err = mmc_switch(host->card, EXT_CSD_CMD_SET_NORMAL,
2091 EXT_CSD_FLUSH_CACHE, 1,
2092 CACHE_FLUSH_TIMEOUT_MS);
2094 pr_err("%s: cache flush error %d\n",
2095 mmc_hostname(host), err);
2101 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2104 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2105 EXT_CSD_POWER_OFF_LONG;
2107 mmc_claim_host(host);
2109 if (mmc_card_suspended(host->card))
2112 err = _mmc_flush_cache(host);
2116 if (mmc_can_poweroff_notify(host->card) &&
2117 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend ||
2118 (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND)))
2119 err = mmc_poweroff_notify(host->card, notify_type);
2120 else if (mmc_can_sleep(host->card))
2121 err = mmc_sleep(host);
2122 else if (!mmc_host_is_spi(host))
2123 err = mmc_deselect_cards(host);
2126 mmc_power_off(host);
2127 mmc_card_set_suspended(host->card);
2130 mmc_release_host(host);
2137 static int mmc_suspend(struct mmc_host *host)
2141 err = _mmc_suspend(host, true);
2143 pm_runtime_disable(&host->card->dev);
2144 pm_runtime_set_suspended(&host->card->dev);
2151 * This function tries to determine if the same card is still present
2152 * and, if so, restore all state to it.
2154 static int _mmc_resume(struct mmc_host *host)
2158 mmc_claim_host(host);
2160 if (!mmc_card_suspended(host->card))
2163 mmc_power_up(host, host->card->ocr);
2164 err = mmc_init_card(host, host->card->ocr, host->card);
2165 mmc_card_clr_suspended(host->card);
2168 mmc_release_host(host);
2175 static int mmc_shutdown(struct mmc_host *host)
2180 * In a specific case for poweroff notify, we need to resume the card
2181 * before we can shutdown it properly.
2183 if (mmc_can_poweroff_notify(host->card) &&
2184 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2185 err = _mmc_resume(host);
2188 err = _mmc_suspend(host, false);
2194 * Callback for resume.
2196 static int mmc_resume(struct mmc_host *host)
2198 pm_runtime_enable(&host->card->dev);
2203 * Callback for runtime_suspend.
2205 static int mmc_runtime_suspend(struct mmc_host *host)
2209 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2212 err = _mmc_suspend(host, true);
2214 pr_err("%s: error %d doing aggressive suspend\n",
2215 mmc_hostname(host), err);
2221 * Callback for runtime_resume.
2223 static int mmc_runtime_resume(struct mmc_host *host)
2227 err = _mmc_resume(host);
2228 if (err && err != -ENOMEDIUM)
2229 pr_err("%s: error %d doing runtime resume\n",
2230 mmc_hostname(host), err);
2235 static int mmc_can_reset(struct mmc_card *card)
2239 rst_n_function = card->ext_csd.rst_n_function;
2240 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2245 static int _mmc_hw_reset(struct mmc_host *host)
2247 struct mmc_card *card = host->card;
2250 * In the case of recovery, we can't expect flushing the cache to work
2251 * always, but we have a go and ignore errors.
2253 _mmc_flush_cache(host);
2255 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->card_hw_reset &&
2256 mmc_can_reset(card)) {
2257 /* If the card accept RST_n signal, send it. */
2258 mmc_set_clock(host, host->f_init);
2259 host->ops->card_hw_reset(host);
2260 /* Set initial state and call mmc_set_ios */
2261 mmc_set_initial_state(host);
2263 /* Do a brute force power cycle */
2264 mmc_power_cycle(host, card->ocr);
2265 mmc_pwrseq_reset(host);
2267 return mmc_init_card(host, card->ocr, card);
2270 static const struct mmc_bus_ops mmc_ops = {
2271 .remove = mmc_remove,
2272 .detect = mmc_detect,
2273 .suspend = mmc_suspend,
2274 .resume = mmc_resume,
2275 .runtime_suspend = mmc_runtime_suspend,
2276 .runtime_resume = mmc_runtime_resume,
2278 .shutdown = mmc_shutdown,
2279 .hw_reset = _mmc_hw_reset,
2280 .cache_enabled = _mmc_cache_enabled,
2281 .flush_cache = _mmc_flush_cache,
2285 * Starting point for MMC card init.
2287 int mmc_attach_mmc(struct mmc_host *host)
2292 WARN_ON(!host->claimed);
2294 /* Set correct bus mode for MMC before attempting attach */
2295 if (!mmc_host_is_spi(host))
2296 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2298 err = mmc_send_op_cond(host, 0, &ocr);
2302 mmc_attach_bus(host, &mmc_ops);
2303 if (host->ocr_avail_mmc)
2304 host->ocr_avail = host->ocr_avail_mmc;
2307 * We need to get OCR a different way for SPI.
2309 if (mmc_host_is_spi(host)) {
2310 err = mmc_spi_read_ocr(host, 1, &ocr);
2315 rocr = mmc_select_voltage(host, ocr);
2318 * Can we support the voltage of the card?
2326 * Detect and init the card.
2328 err = mmc_init_card(host, rocr, NULL);
2332 mmc_release_host(host);
2333 err = mmc_add_card(host->card);
2337 mmc_claim_host(host);
2341 mmc_remove_card(host->card);
2342 mmc_claim_host(host);
2345 mmc_detach_bus(host);
2347 pr_err("%s: error %d whilst initialising MMC card\n",
2348 mmc_hostname(host), err);