2 * linux/drivers/mmc/core/mmc.c
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/err.h>
15 #include <linux/slab.h>
16 #include <linux/stat.h>
17 #include <linux/pm_runtime.h>
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/card.h>
21 #include <linux/mmc/mmc.h>
29 #define DEFAULT_CMD6_TIMEOUT_MS 500
31 static const unsigned int tran_exp[] = {
32 10000, 100000, 1000000, 10000000,
36 static const unsigned char tran_mant[] = {
37 0, 10, 12, 13, 15, 20, 25, 30,
38 35, 40, 45, 50, 55, 60, 70, 80,
41 static const unsigned int tacc_exp[] = {
42 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
45 static const unsigned int tacc_mant[] = {
46 0, 10, 12, 13, 15, 20, 25, 30,
47 35, 40, 45, 50, 55, 60, 70, 80,
50 static const struct mmc_fixup mmc_ext_csd_fixups[] = {
52 * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
53 * is used so disable the HPI feature for such buggy cards.
55 MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
56 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
61 #define UNSTUFF_BITS(resp,start,size) \
63 const int __size = size; \
64 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
65 const int __off = 3 - ((start) / 32); \
66 const int __shft = (start) & 31; \
69 __res = resp[__off] >> __shft; \
70 if (__size + __shft > 32) \
71 __res |= resp[__off-1] << ((32 - __shft) % 32); \
76 * Given the decoded CSD structure, decode the raw CID to our CID structure.
78 static int mmc_decode_cid(struct mmc_card *card)
80 u32 *resp = card->raw_cid;
83 * The selection of the format here is based upon published
84 * specs from sandisk and from what people have reported.
86 switch (card->csd.mmca_vsn) {
87 case 0: /* MMC v1.0 - v1.2 */
88 case 1: /* MMC v1.4 */
89 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
90 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
91 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
92 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
93 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
94 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
95 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
96 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
97 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
98 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
104 case 2: /* MMC v2.0 - v2.2 */
105 case 3: /* MMC v3.1 - v3.3 */
107 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
108 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
109 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
110 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
111 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
112 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
113 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
114 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
115 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
116 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
117 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
118 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
122 pr_err("%s: card has unknown MMCA version %d\n",
123 mmc_hostname(card->host), card->csd.mmca_vsn);
130 static void mmc_set_erase_size(struct mmc_card *card)
132 if (card->ext_csd.erase_group_def & 1)
133 card->erase_size = card->ext_csd.hc_erase_size;
135 card->erase_size = card->csd.erase_size;
137 mmc_init_erase(card);
141 * Given a 128-bit response, decode to our card CSD structure.
143 static int mmc_decode_csd(struct mmc_card *card)
145 struct mmc_csd *csd = &card->csd;
146 unsigned int e, m, a, b;
147 u32 *resp = card->raw_csd;
150 * We only understand CSD structure v1.1 and v1.2.
151 * v1.2 has extra information in bits 15, 11 and 10.
152 * We also support eMMC v4.4 & v4.41.
154 csd->structure = UNSTUFF_BITS(resp, 126, 2);
155 if (csd->structure == 0) {
156 pr_err("%s: unrecognised CSD structure version %d\n",
157 mmc_hostname(card->host), csd->structure);
161 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
162 m = UNSTUFF_BITS(resp, 115, 4);
163 e = UNSTUFF_BITS(resp, 112, 3);
164 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
165 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
167 m = UNSTUFF_BITS(resp, 99, 4);
168 e = UNSTUFF_BITS(resp, 96, 3);
169 csd->max_dtr = tran_exp[e] * tran_mant[m];
170 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
172 e = UNSTUFF_BITS(resp, 47, 3);
173 m = UNSTUFF_BITS(resp, 62, 12);
174 csd->capacity = (1 + m) << (e + 2);
176 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
177 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
178 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
179 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
180 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
181 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
182 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
183 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
185 if (csd->write_blkbits >= 9) {
186 a = UNSTUFF_BITS(resp, 42, 5);
187 b = UNSTUFF_BITS(resp, 37, 5);
188 csd->erase_size = (a + 1) * (b + 1);
189 csd->erase_size <<= csd->write_blkbits - 9;
195 static void mmc_select_card_type(struct mmc_card *card)
197 struct mmc_host *host = card->host;
198 u8 card_type = card->ext_csd.raw_card_type;
199 u32 caps = host->caps, caps2 = host->caps2;
200 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
201 unsigned int avail_type = 0;
203 if (caps & MMC_CAP_MMC_HIGHSPEED &&
204 card_type & EXT_CSD_CARD_TYPE_HS_26) {
205 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
206 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
209 if (caps & MMC_CAP_MMC_HIGHSPEED &&
210 card_type & EXT_CSD_CARD_TYPE_HS_52) {
211 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
212 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
215 if (caps & MMC_CAP_1_8V_DDR &&
216 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
217 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
218 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
221 if (caps & MMC_CAP_1_2V_DDR &&
222 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
223 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
224 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
227 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
228 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
229 hs200_max_dtr = MMC_HS200_MAX_DTR;
230 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
233 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
234 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
235 hs200_max_dtr = MMC_HS200_MAX_DTR;
236 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
239 if (caps2 & MMC_CAP2_HS400_1_8V &&
240 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
241 hs200_max_dtr = MMC_HS200_MAX_DTR;
242 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
245 if (caps2 & MMC_CAP2_HS400_1_2V &&
246 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
247 hs200_max_dtr = MMC_HS200_MAX_DTR;
248 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
251 if ((caps2 & MMC_CAP2_HS400_ES) &&
252 card->ext_csd.strobe_support &&
253 (avail_type & EXT_CSD_CARD_TYPE_HS400))
254 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
256 card->ext_csd.hs_max_dtr = hs_max_dtr;
257 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
258 card->mmc_avail_type = avail_type;
261 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
263 u8 hc_erase_grp_sz, hc_wp_grp_sz;
266 * Disable these attributes by default
268 card->ext_csd.enhanced_area_offset = -EINVAL;
269 card->ext_csd.enhanced_area_size = -EINVAL;
272 * Enhanced area feature support -- check whether the eMMC
273 * card has the Enhanced area enabled. If so, export enhanced
274 * area offset and size to user by adding sysfs interface.
276 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
277 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
278 if (card->ext_csd.partition_setting_completed) {
280 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
282 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
285 * calculate the enhanced data area offset, in bytes
287 card->ext_csd.enhanced_area_offset =
288 (((unsigned long long)ext_csd[139]) << 24) +
289 (((unsigned long long)ext_csd[138]) << 16) +
290 (((unsigned long long)ext_csd[137]) << 8) +
291 (((unsigned long long)ext_csd[136]));
292 if (mmc_card_blockaddr(card))
293 card->ext_csd.enhanced_area_offset <<= 9;
295 * calculate the enhanced data area size, in kilobytes
297 card->ext_csd.enhanced_area_size =
298 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
300 card->ext_csd.enhanced_area_size *=
301 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
302 card->ext_csd.enhanced_area_size <<= 9;
304 pr_warn("%s: defines enhanced area without partition setting complete\n",
305 mmc_hostname(card->host));
310 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
313 u8 hc_erase_grp_sz, hc_wp_grp_sz;
314 unsigned int part_size;
317 * General purpose partition feature support --
318 * If ext_csd has the size of general purpose partitions,
319 * set size, part_cfg, partition name in mmc_part.
321 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
322 EXT_CSD_PART_SUPPORT_PART_EN) {
324 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
326 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
328 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
329 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
330 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
331 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
333 if (card->ext_csd.partition_setting_completed == 0) {
334 pr_warn("%s: has partition size defined without partition complete\n",
335 mmc_hostname(card->host));
339 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
341 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
343 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
344 part_size *= (size_t)(hc_erase_grp_sz *
346 mmc_part_add(card, part_size << 19,
347 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
349 MMC_BLK_DATA_AREA_GP);
354 /* Minimum partition switch timeout in milliseconds */
355 #define MMC_MIN_PART_SWITCH_TIME 300
358 * Decode extended CSD.
360 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
363 unsigned int part_size;
364 struct device_node *np;
365 bool broken_hpi = false;
367 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
368 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
369 if (card->csd.structure == 3) {
370 if (card->ext_csd.raw_ext_csd_structure > 2) {
371 pr_err("%s: unrecognised EXT_CSD structure "
372 "version %d\n", mmc_hostname(card->host),
373 card->ext_csd.raw_ext_csd_structure);
379 np = mmc_of_find_child_device(card->host, 0);
380 if (np && of_device_is_compatible(np, "mmc-card"))
381 broken_hpi = of_property_read_bool(np, "broken-hpi");
385 * The EXT_CSD format is meant to be forward compatible. As long
386 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
387 * are authorized, see JEDEC JESD84-B50 section B.8.
389 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
391 /* fixup device after ext_csd revision field is updated */
392 mmc_fixup_device(card, mmc_ext_csd_fixups);
394 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
395 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
396 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
397 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
398 if (card->ext_csd.rev >= 2) {
399 card->ext_csd.sectors =
400 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
401 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
402 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
403 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
405 /* Cards with density > 2GiB are sector addressed */
406 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
407 mmc_card_set_blockaddr(card);
410 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
411 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
412 mmc_select_card_type(card);
414 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
415 card->ext_csd.raw_erase_timeout_mult =
416 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
417 card->ext_csd.raw_hc_erase_grp_size =
418 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
419 if (card->ext_csd.rev >= 3) {
420 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
421 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
423 /* EXT_CSD value is in units of 10ms, but we store in ms */
424 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
425 /* Some eMMC set the value too low so set a minimum */
426 if (card->ext_csd.part_time &&
427 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
428 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
430 /* Sleep / awake timeout in 100ns units */
431 if (sa_shift > 0 && sa_shift <= 0x17)
432 card->ext_csd.sa_timeout =
433 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
434 card->ext_csd.erase_group_def =
435 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
436 card->ext_csd.hc_erase_timeout = 300 *
437 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
438 card->ext_csd.hc_erase_size =
439 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
441 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
444 * There are two boot regions of equal size, defined in
447 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
448 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
449 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
450 mmc_part_add(card, part_size,
451 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
453 MMC_BLK_DATA_AREA_BOOT);
458 card->ext_csd.raw_hc_erase_gap_size =
459 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
460 card->ext_csd.raw_sec_trim_mult =
461 ext_csd[EXT_CSD_SEC_TRIM_MULT];
462 card->ext_csd.raw_sec_erase_mult =
463 ext_csd[EXT_CSD_SEC_ERASE_MULT];
464 card->ext_csd.raw_sec_feature_support =
465 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
466 card->ext_csd.raw_trim_mult =
467 ext_csd[EXT_CSD_TRIM_MULT];
468 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
469 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
470 if (card->ext_csd.rev >= 4) {
471 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
472 EXT_CSD_PART_SETTING_COMPLETED)
473 card->ext_csd.partition_setting_completed = 1;
475 card->ext_csd.partition_setting_completed = 0;
477 mmc_manage_enhanced_area(card, ext_csd);
479 mmc_manage_gp_partitions(card, ext_csd);
481 card->ext_csd.sec_trim_mult =
482 ext_csd[EXT_CSD_SEC_TRIM_MULT];
483 card->ext_csd.sec_erase_mult =
484 ext_csd[EXT_CSD_SEC_ERASE_MULT];
485 card->ext_csd.sec_feature_support =
486 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
487 card->ext_csd.trim_timeout = 300 *
488 ext_csd[EXT_CSD_TRIM_MULT];
491 * Note that the call to mmc_part_add above defaults to read
492 * only. If this default assumption is changed, the call must
493 * take into account the value of boot_locked below.
495 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
496 card->ext_csd.boot_ro_lockable = true;
498 /* Save power class values */
499 card->ext_csd.raw_pwr_cl_52_195 =
500 ext_csd[EXT_CSD_PWR_CL_52_195];
501 card->ext_csd.raw_pwr_cl_26_195 =
502 ext_csd[EXT_CSD_PWR_CL_26_195];
503 card->ext_csd.raw_pwr_cl_52_360 =
504 ext_csd[EXT_CSD_PWR_CL_52_360];
505 card->ext_csd.raw_pwr_cl_26_360 =
506 ext_csd[EXT_CSD_PWR_CL_26_360];
507 card->ext_csd.raw_pwr_cl_200_195 =
508 ext_csd[EXT_CSD_PWR_CL_200_195];
509 card->ext_csd.raw_pwr_cl_200_360 =
510 ext_csd[EXT_CSD_PWR_CL_200_360];
511 card->ext_csd.raw_pwr_cl_ddr_52_195 =
512 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
513 card->ext_csd.raw_pwr_cl_ddr_52_360 =
514 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
515 card->ext_csd.raw_pwr_cl_ddr_200_360 =
516 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
519 if (card->ext_csd.rev >= 5) {
520 /* Adjust production date as per JEDEC JESD84-B451 */
521 if (card->cid.year < 2010)
522 card->cid.year += 16;
524 /* check whether the eMMC card supports BKOPS */
525 if (!mmc_card_broken_hpi(card) &&
526 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 not set\n",
535 mmc_hostname(card->host));
538 /* check whether the eMMC card supports HPI */
539 if (!mmc_card_broken_hpi(card) &&
540 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
541 card->ext_csd.hpi = 1;
542 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
543 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
545 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
547 * Indicate the maximum timeout to close
548 * a command interrupted by HPI
550 card->ext_csd.out_of_int_time =
551 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
554 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
555 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
558 * RPMB regions are defined in multiples of 128K.
560 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
561 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
562 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
563 EXT_CSD_PART_CONFIG_ACC_RPMB,
565 MMC_BLK_DATA_AREA_RPMB);
569 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
570 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
571 card->erased_byte = 0xFF;
573 card->erased_byte = 0x0;
575 /* eMMC v4.5 or later */
576 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
577 if (card->ext_csd.rev >= 6) {
578 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
580 card->ext_csd.generic_cmd6_time = 10 *
581 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
582 card->ext_csd.power_off_longtime = 10 *
583 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
585 card->ext_csd.cache_size =
586 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
587 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
588 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
589 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
591 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
592 card->ext_csd.data_sector_size = 4096;
594 card->ext_csd.data_sector_size = 512;
596 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
597 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
598 card->ext_csd.data_tag_unit_size =
599 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
600 (card->ext_csd.data_sector_size);
602 card->ext_csd.data_tag_unit_size = 0;
605 card->ext_csd.max_packed_writes =
606 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
607 card->ext_csd.max_packed_reads =
608 ext_csd[EXT_CSD_MAX_PACKED_READS];
610 card->ext_csd.data_sector_size = 512;
613 /* eMMC v5 or later */
614 if (card->ext_csd.rev >= 7) {
615 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
617 card->ext_csd.ffu_capable =
618 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
619 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
625 static int mmc_read_ext_csd(struct mmc_card *card)
630 if (!mmc_can_ext_csd(card))
633 err = mmc_get_ext_csd(card, &ext_csd);
635 /* If the host or the card can't do the switch,
636 * fail more gracefully. */
643 * High capacity cards should have this "magic" size
644 * stored in their CSD.
646 if (card->csd.capacity == (4096 * 512)) {
647 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
648 mmc_hostname(card->host));
650 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
651 mmc_hostname(card->host));
658 err = mmc_decode_ext_csd(card, ext_csd);
663 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
668 if (bus_width == MMC_BUS_WIDTH_1)
671 err = mmc_get_ext_csd(card, &bw_ext_csd);
675 /* only compare read only fields */
676 err = !((card->ext_csd.raw_partition_support ==
677 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
678 (card->ext_csd.raw_erased_mem_count ==
679 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
680 (card->ext_csd.rev ==
681 bw_ext_csd[EXT_CSD_REV]) &&
682 (card->ext_csd.raw_ext_csd_structure ==
683 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
684 (card->ext_csd.raw_card_type ==
685 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
686 (card->ext_csd.raw_s_a_timeout ==
687 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
688 (card->ext_csd.raw_hc_erase_gap_size ==
689 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
690 (card->ext_csd.raw_erase_timeout_mult ==
691 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
692 (card->ext_csd.raw_hc_erase_grp_size ==
693 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
694 (card->ext_csd.raw_sec_trim_mult ==
695 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
696 (card->ext_csd.raw_sec_erase_mult ==
697 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
698 (card->ext_csd.raw_sec_feature_support ==
699 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
700 (card->ext_csd.raw_trim_mult ==
701 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
702 (card->ext_csd.raw_sectors[0] ==
703 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
704 (card->ext_csd.raw_sectors[1] ==
705 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
706 (card->ext_csd.raw_sectors[2] ==
707 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
708 (card->ext_csd.raw_sectors[3] ==
709 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
710 (card->ext_csd.raw_pwr_cl_52_195 ==
711 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
712 (card->ext_csd.raw_pwr_cl_26_195 ==
713 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
714 (card->ext_csd.raw_pwr_cl_52_360 ==
715 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
716 (card->ext_csd.raw_pwr_cl_26_360 ==
717 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
718 (card->ext_csd.raw_pwr_cl_200_195 ==
719 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
720 (card->ext_csd.raw_pwr_cl_200_360 ==
721 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
722 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
723 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
724 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
725 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
726 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
727 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
736 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
737 card->raw_cid[2], card->raw_cid[3]);
738 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
739 card->raw_csd[2], card->raw_csd[3]);
740 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
741 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
742 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
743 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
744 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
745 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
746 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
747 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
748 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
749 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
750 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
751 card->ext_csd.enhanced_area_offset);
752 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
753 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
754 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
755 MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
757 static ssize_t mmc_fwrev_show(struct device *dev,
758 struct device_attribute *attr,
761 struct mmc_card *card = mmc_dev_to_card(dev);
763 if (card->ext_csd.rev < 7) {
764 return sprintf(buf, "0x%x\n", card->cid.fwrev);
766 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
767 card->ext_csd.fwrev);
771 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
773 static ssize_t mmc_dsr_show(struct device *dev,
774 struct device_attribute *attr,
777 struct mmc_card *card = mmc_dev_to_card(dev);
778 struct mmc_host *host = card->host;
780 if (card->csd.dsr_imp && host->dsr_req)
781 return sprintf(buf, "0x%x\n", host->dsr);
783 /* return default DSR value */
784 return sprintf(buf, "0x%x\n", 0x404);
787 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
789 static struct attribute *mmc_std_attrs[] = {
793 &dev_attr_erase_size.attr,
794 &dev_attr_preferred_erase_size.attr,
795 &dev_attr_fwrev.attr,
796 &dev_attr_ffu_capable.attr,
797 &dev_attr_hwrev.attr,
798 &dev_attr_manfid.attr,
800 &dev_attr_oemid.attr,
802 &dev_attr_serial.attr,
803 &dev_attr_enhanced_area_offset.attr,
804 &dev_attr_enhanced_area_size.attr,
805 &dev_attr_raw_rpmb_size_mult.attr,
806 &dev_attr_rel_sectors.attr,
811 ATTRIBUTE_GROUPS(mmc_std);
813 static struct device_type mmc_type = {
814 .groups = mmc_std_groups,
818 * Select the PowerClass for the current bus width
819 * If power class is defined for 4/8 bit bus in the
820 * extended CSD register, select it by executing the
821 * mmc_switch command.
823 static int __mmc_select_powerclass(struct mmc_card *card,
824 unsigned int bus_width)
826 struct mmc_host *host = card->host;
827 struct mmc_ext_csd *ext_csd = &card->ext_csd;
828 unsigned int pwrclass_val = 0;
831 switch (1 << host->ios.vdd) {
832 case MMC_VDD_165_195:
833 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
834 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
835 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
836 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
837 ext_csd->raw_pwr_cl_52_195 :
838 ext_csd->raw_pwr_cl_ddr_52_195;
839 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
840 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
851 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
852 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
853 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
854 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
855 ext_csd->raw_pwr_cl_52_360 :
856 ext_csd->raw_pwr_cl_ddr_52_360;
857 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
858 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
859 ext_csd->raw_pwr_cl_ddr_200_360 :
860 ext_csd->raw_pwr_cl_200_360;
863 pr_warn("%s: Voltage range not supported for power class\n",
868 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
869 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
870 EXT_CSD_PWR_CL_8BIT_SHIFT;
872 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
873 EXT_CSD_PWR_CL_4BIT_SHIFT;
875 /* If the power class is different from the default value */
876 if (pwrclass_val > 0) {
877 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
880 card->ext_csd.generic_cmd6_time);
886 static int mmc_select_powerclass(struct mmc_card *card)
888 struct mmc_host *host = card->host;
889 u32 bus_width, ext_csd_bits;
892 /* Power class selection is supported for versions >= 4.0 */
893 if (!mmc_can_ext_csd(card))
896 bus_width = host->ios.bus_width;
897 /* Power class values are defined only for 4/8 bit bus */
898 if (bus_width == MMC_BUS_WIDTH_1)
901 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
903 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
904 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
906 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
907 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
909 err = __mmc_select_powerclass(card, ext_csd_bits);
911 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
912 mmc_hostname(host), 1 << bus_width, ddr);
918 * Set the bus speed for the selected speed mode.
920 static void mmc_set_bus_speed(struct mmc_card *card)
922 unsigned int max_dtr = (unsigned int)-1;
924 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
925 max_dtr > card->ext_csd.hs200_max_dtr)
926 max_dtr = card->ext_csd.hs200_max_dtr;
927 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
928 max_dtr = card->ext_csd.hs_max_dtr;
929 else if (max_dtr > card->csd.max_dtr)
930 max_dtr = card->csd.max_dtr;
932 mmc_set_clock(card->host, max_dtr);
936 * Select the bus width amoung 4-bit and 8-bit(SDR).
937 * If the bus width is changed successfully, return the selected width value.
938 * Zero is returned instead of error value if the wide width is not supported.
940 static int mmc_select_bus_width(struct mmc_card *card)
942 static unsigned ext_csd_bits[] = {
946 static unsigned bus_widths[] = {
950 struct mmc_host *host = card->host;
951 unsigned idx, bus_width = 0;
954 if (!mmc_can_ext_csd(card) ||
955 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
958 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
961 * Unlike SD, MMC cards dont have a configuration register to notify
962 * supported bus width. So bus test command should be run to identify
963 * the supported bus width or compare the ext csd values of current
964 * bus width and ext csd values of 1 bit mode read earlier.
966 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
968 * Host is capable of 8bit transfer, then switch
969 * the device to work in 8bit transfer mode. If the
970 * mmc switch command returns error then switch to
971 * 4bit transfer mode. On success set the corresponding
972 * bus width on the host.
974 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
977 card->ext_csd.generic_cmd6_time);
981 bus_width = bus_widths[idx];
982 mmc_set_bus_width(host, bus_width);
985 * If controller can't handle bus width test,
986 * compare ext_csd previously read in 1 bit mode
987 * against ext_csd at new bus width
989 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
990 err = mmc_compare_ext_csds(card, bus_width);
992 err = mmc_bus_test(card, bus_width);
998 pr_warn("%s: switch to bus width %d failed\n",
999 mmc_hostname(host), 1 << bus_width);
1006 /* Caller must hold re-tuning */
1007 static int mmc_switch_status(struct mmc_card *card)
1012 err = mmc_send_status(card, &status);
1016 return mmc_switch_status_error(card->host, status);
1020 * Switch to the high-speed mode
1022 static int mmc_select_hs(struct mmc_card *card)
1026 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1027 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1028 card->ext_csd.generic_cmd6_time,
1031 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1032 err = mmc_switch_status(card);
1036 pr_warn("%s: switch to high-speed failed, err:%d\n",
1037 mmc_hostname(card->host), err);
1043 * Activate wide bus and DDR if supported.
1045 static int mmc_select_hs_ddr(struct mmc_card *card)
1047 struct mmc_host *host = card->host;
1048 u32 bus_width, ext_csd_bits;
1051 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1054 bus_width = host->ios.bus_width;
1055 if (bus_width == MMC_BUS_WIDTH_1)
1058 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1059 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1061 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1064 card->ext_csd.generic_cmd6_time);
1066 pr_err("%s: switch to bus width %d ddr failed\n",
1067 mmc_hostname(host), 1 << bus_width);
1072 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1075 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1077 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1078 * in the JEDEC spec for DDR.
1080 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1081 * host controller can support this, like some of the SDHCI
1082 * controller which connect to an eMMC device. Some of these
1083 * host controller still needs to use 1.8v vccq for supporting
1086 * So the sequence will be:
1087 * if (host and device can both support 1.2v IO)
1089 * else if (host and device can both support 1.8v IO)
1091 * so if host and device can only support 3.3v IO, this is the
1094 * WARNING: eMMC rules are NOT the same as SD DDR
1097 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1098 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1100 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1101 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1103 /* make sure vccq is 3.3v after switching disaster */
1105 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1108 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1113 static int mmc_select_hs400(struct mmc_card *card)
1115 struct mmc_host *host = card->host;
1116 unsigned int max_dtr;
1121 * HS400 mode requires 8-bit bus width
1123 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1124 host->ios.bus_width == MMC_BUS_WIDTH_8))
1127 /* Switch card to HS mode */
1128 val = EXT_CSD_TIMING_HS;
1129 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1130 EXT_CSD_HS_TIMING, val,
1131 card->ext_csd.generic_cmd6_time,
1134 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1135 mmc_hostname(host), err);
1139 /* Set host controller to HS timing */
1140 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1142 /* Reduce frequency to HS frequency */
1143 max_dtr = card->ext_csd.hs_max_dtr;
1144 mmc_set_clock(host, max_dtr);
1146 err = mmc_switch_status(card);
1150 /* Switch card to DDR */
1151 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1153 EXT_CSD_DDR_BUS_WIDTH_8,
1154 card->ext_csd.generic_cmd6_time);
1156 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1157 mmc_hostname(host), err);
1161 /* Switch card to HS400 */
1162 val = EXT_CSD_TIMING_HS400 |
1163 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1164 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1165 EXT_CSD_HS_TIMING, val,
1166 card->ext_csd.generic_cmd6_time,
1169 pr_err("%s: switch to hs400 failed, err:%d\n",
1170 mmc_hostname(host), err);
1174 /* Set host controller to HS400 timing and frequency */
1175 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1176 mmc_set_bus_speed(card);
1178 err = mmc_switch_status(card);
1185 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1190 int mmc_hs200_to_hs400(struct mmc_card *card)
1192 return mmc_select_hs400(card);
1195 int mmc_hs400_to_hs200(struct mmc_card *card)
1197 struct mmc_host *host = card->host;
1198 unsigned int max_dtr;
1202 /* Reduce frequency to HS */
1203 max_dtr = card->ext_csd.hs_max_dtr;
1204 mmc_set_clock(host, max_dtr);
1206 /* Switch HS400 to HS DDR */
1207 val = EXT_CSD_TIMING_HS;
1208 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1209 val, card->ext_csd.generic_cmd6_time,
1214 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1216 err = mmc_switch_status(card);
1220 /* Switch HS DDR to HS */
1221 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1222 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1227 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1229 err = mmc_switch_status(card);
1233 /* Switch HS to HS200 */
1234 val = EXT_CSD_TIMING_HS200 |
1235 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1236 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1237 val, card->ext_csd.generic_cmd6_time,
1242 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1244 err = mmc_switch_status(card);
1248 mmc_set_bus_speed(card);
1253 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1258 static int mmc_select_hs400es(struct mmc_card *card)
1260 struct mmc_host *host = card->host;
1264 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1269 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1270 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1272 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1273 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1275 /* If fails try again during next card power cycle */
1279 err = mmc_select_bus_width(card);
1283 /* Switch card to HS mode */
1284 err = mmc_select_hs(card);
1288 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1290 err = mmc_switch_status(card);
1294 /* Switch card to DDR with strobe bit */
1295 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1296 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1299 card->ext_csd.generic_cmd6_time);
1301 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1302 mmc_hostname(host), err);
1306 /* Switch card to HS400 */
1307 val = EXT_CSD_TIMING_HS400 |
1308 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1309 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1310 EXT_CSD_HS_TIMING, val,
1311 card->ext_csd.generic_cmd6_time,
1314 pr_err("%s: switch to hs400es failed, err:%d\n",
1315 mmc_hostname(host), err);
1319 /* Set host controller to HS400 timing and frequency */
1320 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1322 /* Controller enable enhanced strobe function */
1323 host->ios.enhanced_strobe = true;
1324 if (host->ops->hs400_enhanced_strobe)
1325 host->ops->hs400_enhanced_strobe(host, &host->ios);
1327 err = mmc_switch_status(card);
1334 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1339 static void mmc_select_driver_type(struct mmc_card *card)
1341 int card_drv_type, drive_strength, drv_type;
1343 card_drv_type = card->ext_csd.raw_driver_strength |
1344 mmc_driver_type_mask(0);
1346 drive_strength = mmc_select_drive_strength(card,
1347 card->ext_csd.hs200_max_dtr,
1348 card_drv_type, &drv_type);
1350 card->drive_strength = drive_strength;
1353 mmc_set_driver_type(card->host, drv_type);
1357 * For device supporting HS200 mode, the following sequence
1358 * should be done before executing the tuning process.
1359 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1360 * 2. switch to HS200 mode
1361 * 3. set the clock to > 52Mhz and <=200MHz
1363 static int mmc_select_hs200(struct mmc_card *card)
1365 struct mmc_host *host = card->host;
1366 unsigned int old_timing, old_signal_voltage;
1370 old_signal_voltage = host->ios.signal_voltage;
1371 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1372 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1374 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1375 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1377 /* If fails try again during next card power cycle */
1381 mmc_select_driver_type(card);
1384 * Set the bus width(4 or 8) with host's support and
1385 * switch to HS200 mode if bus width is set successfully.
1387 err = mmc_select_bus_width(card);
1389 val = EXT_CSD_TIMING_HS200 |
1390 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1391 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1392 EXT_CSD_HS_TIMING, val,
1393 card->ext_csd.generic_cmd6_time,
1397 old_timing = host->ios.timing;
1398 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1400 err = mmc_switch_status(card);
1402 * mmc_select_timing() assumes timing has not changed if
1403 * it is a switch error.
1405 if (err == -EBADMSG)
1406 mmc_set_timing(host, old_timing);
1410 /* fall back to the old signal voltage, if fails report error */
1411 if (__mmc_set_signal_voltage(host, old_signal_voltage))
1414 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1421 * Activate High Speed, HS200 or HS400ES mode if supported.
1423 static int mmc_select_timing(struct mmc_card *card)
1427 if (!mmc_can_ext_csd(card))
1430 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1431 err = mmc_select_hs400es(card);
1432 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1433 err = mmc_select_hs200(card);
1434 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1435 err = mmc_select_hs(card);
1437 if (err && err != -EBADMSG)
1442 * Set the bus speed to the selected bus timing.
1443 * If timing is not selected, backward compatible is the default.
1445 mmc_set_bus_speed(card);
1450 * Execute tuning sequence to seek the proper bus operating
1451 * conditions for HS200 and HS400, which sends CMD21 to the device.
1453 static int mmc_hs200_tuning(struct mmc_card *card)
1455 struct mmc_host *host = card->host;
1458 * Timing should be adjusted to the HS400 target
1459 * operation frequency for tuning process
1461 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1462 host->ios.bus_width == MMC_BUS_WIDTH_8)
1463 if (host->ops->prepare_hs400_tuning)
1464 host->ops->prepare_hs400_tuning(host, &host->ios);
1466 return mmc_execute_tuning(card);
1470 * Handle the detection and initialisation of a card.
1472 * In the case of a resume, "oldcard" will contain the card
1473 * we're trying to reinitialise.
1475 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1476 struct mmc_card *oldcard)
1478 struct mmc_card *card;
1484 WARN_ON(!host->claimed);
1486 /* Set correct bus mode for MMC before attempting init */
1487 if (!mmc_host_is_spi(host))
1488 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1491 * Since we're changing the OCR value, we seem to
1492 * need to tell some cards to go back to the idle
1493 * state. We wait 1ms to give cards time to
1495 * mmc_go_idle is needed for eMMC that are asleep
1499 /* The extra bit indicates that we support high capacity */
1500 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1505 * For SPI, enable CRC as appropriate.
1507 if (mmc_host_is_spi(host)) {
1508 err = mmc_spi_set_crc(host, use_spi_crc);
1514 * Fetch CID from card.
1516 if (mmc_host_is_spi(host))
1517 err = mmc_send_cid(host, cid);
1519 err = mmc_all_send_cid(host, cid);
1524 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1532 * Allocate card structure.
1534 card = mmc_alloc_card(host, &mmc_type);
1536 err = PTR_ERR(card);
1541 card->type = MMC_TYPE_MMC;
1543 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1547 * Call the optional HC's init_card function to handle quirks.
1549 if (host->ops->init_card)
1550 host->ops->init_card(host, card);
1553 * For native busses: set card RCA and quit open drain mode.
1555 if (!mmc_host_is_spi(host)) {
1556 err = mmc_set_relative_addr(card);
1560 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1565 * Fetch CSD from card.
1567 err = mmc_send_csd(card, card->raw_csd);
1571 err = mmc_decode_csd(card);
1574 err = mmc_decode_cid(card);
1580 * handling only for cards supporting DSR and hosts requesting
1583 if (card->csd.dsr_imp && host->dsr_req)
1587 * Select card, as all following commands rely on that.
1589 if (!mmc_host_is_spi(host)) {
1590 err = mmc_select_card(card);
1596 /* Read extended CSD. */
1597 err = mmc_read_ext_csd(card);
1602 * If doing byte addressing, check if required to do sector
1603 * addressing. Handle the case of <2GB cards needing sector
1604 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1605 * ocr register has bit 30 set for sector addressing.
1608 mmc_card_set_blockaddr(card);
1610 /* Erase size depends on CSD and Extended CSD */
1611 mmc_set_erase_size(card);
1615 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1616 * bit. This bit will be lost every time after a reset or power off.
1618 if (card->ext_csd.partition_setting_completed ||
1619 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1620 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1621 EXT_CSD_ERASE_GROUP_DEF, 1,
1622 card->ext_csd.generic_cmd6_time);
1624 if (err && err != -EBADMSG)
1630 * Just disable enhanced area off & sz
1631 * will try to enable ERASE_GROUP_DEF
1632 * during next time reinit
1634 card->ext_csd.enhanced_area_offset = -EINVAL;
1635 card->ext_csd.enhanced_area_size = -EINVAL;
1637 card->ext_csd.erase_group_def = 1;
1639 * enable ERASE_GRP_DEF successfully.
1640 * This will affect the erase size, so
1641 * here need to reset erase size
1643 mmc_set_erase_size(card);
1648 * Ensure eMMC user default partition is enabled
1650 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1651 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1652 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1653 card->ext_csd.part_config,
1654 card->ext_csd.part_time);
1655 if (err && err != -EBADMSG)
1660 * Enable power_off_notification byte in the ext_csd register
1662 if (card->ext_csd.rev >= 6) {
1663 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1664 EXT_CSD_POWER_OFF_NOTIFICATION,
1666 card->ext_csd.generic_cmd6_time);
1667 if (err && err != -EBADMSG)
1671 * The err can be -EBADMSG or 0,
1672 * so check for success and update the flag
1675 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1679 * Select timing interface
1681 err = mmc_select_timing(card);
1685 if (mmc_card_hs200(card)) {
1686 err = mmc_hs200_tuning(card);
1690 err = mmc_select_hs400(card);
1693 } else if (mmc_card_hs(card)) {
1694 /* Select the desired bus width optionally */
1695 err = mmc_select_bus_width(card);
1697 err = mmc_select_hs_ddr(card);
1704 * Choose the power class with selected bus interface
1706 mmc_select_powerclass(card);
1709 * Enable HPI feature (if supported)
1711 if (card->ext_csd.hpi) {
1712 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1713 EXT_CSD_HPI_MGMT, 1,
1714 card->ext_csd.generic_cmd6_time);
1715 if (err && err != -EBADMSG)
1718 pr_warn("%s: Enabling HPI failed\n",
1719 mmc_hostname(card->host));
1722 card->ext_csd.hpi_en = 1;
1726 * If cache size is higher than 0, this indicates
1727 * the existence of cache and it can be turned on.
1729 if (!mmc_card_broken_hpi(card) &&
1730 card->ext_csd.cache_size > 0) {
1731 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1732 EXT_CSD_CACHE_CTRL, 1,
1733 card->ext_csd.generic_cmd6_time);
1734 if (err && err != -EBADMSG)
1738 * Only if no error, cache is turned on successfully.
1741 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1742 mmc_hostname(card->host), err);
1743 card->ext_csd.cache_ctrl = 0;
1746 card->ext_csd.cache_ctrl = 1;
1751 * The mandatory minimum values are defined for packed command.
1754 if (card->ext_csd.max_packed_writes >= 3 &&
1755 card->ext_csd.max_packed_reads >= 5 &&
1756 host->caps2 & MMC_CAP2_PACKED_CMD) {
1757 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1758 EXT_CSD_EXP_EVENTS_CTRL,
1759 EXT_CSD_PACKED_EVENT_EN,
1760 card->ext_csd.generic_cmd6_time);
1761 if (err && err != -EBADMSG)
1764 pr_warn("%s: Enabling packed event failed\n",
1765 mmc_hostname(card->host));
1766 card->ext_csd.packed_event_en = 0;
1769 card->ext_csd.packed_event_en = 1;
1780 mmc_remove_card(card);
1785 static int mmc_can_sleep(struct mmc_card *card)
1787 return (card && card->ext_csd.rev >= 3);
1790 static int mmc_sleep(struct mmc_host *host)
1792 struct mmc_command cmd = {0};
1793 struct mmc_card *card = host->card;
1794 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1797 /* Re-tuning can't be done once the card is deselected */
1798 mmc_retune_hold(host);
1800 err = mmc_deselect_cards(host);
1804 cmd.opcode = MMC_SLEEP_AWAKE;
1805 cmd.arg = card->rca << 16;
1809 * If the max_busy_timeout of the host is specified, validate it against
1810 * the sleep cmd timeout. A failure means we need to prevent the host
1811 * from doing hw busy detection, which is done by converting to a R1
1812 * response instead of a R1B.
1814 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1815 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1817 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1818 cmd.busy_timeout = timeout_ms;
1821 err = mmc_wait_for_cmd(host, &cmd, 0);
1826 * If the host does not wait while the card signals busy, then we will
1827 * will have to wait the sleep/awake timeout. Note, we cannot use the
1828 * SEND_STATUS command to poll the status because that command (and most
1829 * others) is invalid while the card sleeps.
1831 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1832 mmc_delay(timeout_ms);
1835 mmc_retune_release(host);
1839 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1842 mmc_card_mmc(card) &&
1843 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1846 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1848 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1851 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1852 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1853 timeout = card->ext_csd.power_off_longtime;
1855 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1856 EXT_CSD_POWER_OFF_NOTIFICATION,
1857 notify_type, timeout, true, false, false);
1859 pr_err("%s: Power Off Notification timed out, %u\n",
1860 mmc_hostname(card->host), timeout);
1862 /* Disable the power off notification after the switch operation. */
1863 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1869 * Host is being removed. Free up the current card.
1871 static void mmc_remove(struct mmc_host *host)
1874 BUG_ON(!host->card);
1876 mmc_remove_card(host->card);
1881 * Card detection - card is alive.
1883 static int mmc_alive(struct mmc_host *host)
1885 return mmc_send_status(host->card, NULL);
1889 * Card detection callback from host.
1891 static void mmc_detect(struct mmc_host *host)
1896 BUG_ON(!host->card);
1898 mmc_get_card(host->card);
1901 * Just check if our card has been removed.
1903 err = _mmc_detect_card_removed(host);
1905 mmc_put_card(host->card);
1910 mmc_claim_host(host);
1911 mmc_detach_bus(host);
1912 mmc_power_off(host);
1913 mmc_release_host(host);
1917 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1920 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1921 EXT_CSD_POWER_OFF_LONG;
1924 BUG_ON(!host->card);
1926 mmc_claim_host(host);
1928 if (mmc_card_suspended(host->card))
1931 if (mmc_card_doing_bkops(host->card)) {
1932 err = mmc_stop_bkops(host->card);
1937 err = mmc_flush_cache(host->card);
1941 if (mmc_can_poweroff_notify(host->card) &&
1942 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1943 err = mmc_poweroff_notify(host->card, notify_type);
1944 else if (mmc_can_sleep(host->card))
1945 err = mmc_sleep(host);
1946 else if (!mmc_host_is_spi(host))
1947 err = mmc_deselect_cards(host);
1950 mmc_power_off(host);
1951 mmc_card_set_suspended(host->card);
1954 mmc_release_host(host);
1961 static int mmc_suspend(struct mmc_host *host)
1965 err = _mmc_suspend(host, true);
1967 pm_runtime_disable(&host->card->dev);
1968 pm_runtime_set_suspended(&host->card->dev);
1975 * This function tries to determine if the same card is still present
1976 * and, if so, restore all state to it.
1978 static int _mmc_resume(struct mmc_host *host)
1983 BUG_ON(!host->card);
1985 mmc_claim_host(host);
1987 if (!mmc_card_suspended(host->card))
1990 mmc_power_up(host, host->card->ocr);
1991 err = mmc_init_card(host, host->card->ocr, host->card);
1992 mmc_card_clr_suspended(host->card);
1995 mmc_release_host(host);
2002 static int mmc_shutdown(struct mmc_host *host)
2007 * In a specific case for poweroff notify, we need to resume the card
2008 * before we can shutdown it properly.
2010 if (mmc_can_poweroff_notify(host->card) &&
2011 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2012 err = _mmc_resume(host);
2015 err = _mmc_suspend(host, false);
2021 * Callback for resume.
2023 static int mmc_resume(struct mmc_host *host)
2025 pm_runtime_enable(&host->card->dev);
2030 * Callback for runtime_suspend.
2032 static int mmc_runtime_suspend(struct mmc_host *host)
2036 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2039 err = _mmc_suspend(host, true);
2041 pr_err("%s: error %d doing aggressive suspend\n",
2042 mmc_hostname(host), err);
2048 * Callback for runtime_resume.
2050 static int mmc_runtime_resume(struct mmc_host *host)
2054 err = _mmc_resume(host);
2055 if (err && err != -ENOMEDIUM)
2056 pr_err("%s: error %d doing runtime resume\n",
2057 mmc_hostname(host), err);
2062 int mmc_can_reset(struct mmc_card *card)
2066 rst_n_function = card->ext_csd.rst_n_function;
2067 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2071 EXPORT_SYMBOL(mmc_can_reset);
2073 static int mmc_reset(struct mmc_host *host)
2075 struct mmc_card *card = host->card;
2078 * In the case of recovery, we can't expect flushing the cache to work
2079 * always, but we have a go and ignore errors.
2081 mmc_flush_cache(host->card);
2083 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2084 mmc_can_reset(card)) {
2085 /* If the card accept RST_n signal, send it. */
2086 mmc_set_clock(host, host->f_init);
2087 host->ops->hw_reset(host);
2088 /* Set initial state and call mmc_set_ios */
2089 mmc_set_initial_state(host);
2091 /* Do a brute force power cycle */
2092 mmc_power_cycle(host, card->ocr);
2094 return mmc_init_card(host, card->ocr, card);
2097 static const struct mmc_bus_ops mmc_ops = {
2098 .remove = mmc_remove,
2099 .detect = mmc_detect,
2100 .suspend = mmc_suspend,
2101 .resume = mmc_resume,
2102 .runtime_suspend = mmc_runtime_suspend,
2103 .runtime_resume = mmc_runtime_resume,
2105 .shutdown = mmc_shutdown,
2110 * Starting point for MMC card init.
2112 int mmc_attach_mmc(struct mmc_host *host)
2118 WARN_ON(!host->claimed);
2120 /* Set correct bus mode for MMC before attempting attach */
2121 if (!mmc_host_is_spi(host))
2122 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2124 err = mmc_send_op_cond(host, 0, &ocr);
2128 mmc_attach_bus(host, &mmc_ops);
2129 if (host->ocr_avail_mmc)
2130 host->ocr_avail = host->ocr_avail_mmc;
2133 * We need to get OCR a different way for SPI.
2135 if (mmc_host_is_spi(host)) {
2136 err = mmc_spi_read_ocr(host, 1, &ocr);
2141 rocr = mmc_select_voltage(host, ocr);
2144 * Can we support the voltage of the card?
2152 * Detect and init the card.
2154 err = mmc_init_card(host, rocr, NULL);
2158 mmc_release_host(host);
2159 err = mmc_add_card(host->card);
2163 mmc_claim_host(host);
2167 mmc_remove_card(host->card);
2168 mmc_claim_host(host);
2171 mmc_detach_bus(host);
2173 pr_err("%s: error %d whilst initialising MMC card\n",
2174 mmc_hostname(host), err);