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
30 #define MIN_CACHE_EN_TIMEOUT_MS 1600
32 static const unsigned int tran_exp[] = {
33 10000, 100000, 1000000, 10000000,
37 static const unsigned char tran_mant[] = {
38 0, 10, 12, 13, 15, 20, 25, 30,
39 35, 40, 45, 50, 55, 60, 70, 80,
42 static const unsigned int tacc_exp[] = {
43 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
46 static const unsigned int tacc_mant[] = {
47 0, 10, 12, 13, 15, 20, 25, 30,
48 35, 40, 45, 50, 55, 60, 70, 80,
51 static const struct mmc_fixup mmc_ext_csd_fixups[] = {
53 * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
54 * is used so disable the HPI feature for such buggy cards.
56 MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
57 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
62 #define UNSTUFF_BITS(resp,start,size) \
64 const int __size = size; \
65 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
66 const int __off = 3 - ((start) / 32); \
67 const int __shft = (start) & 31; \
70 __res = resp[__off] >> __shft; \
71 if (__size + __shft > 32) \
72 __res |= resp[__off-1] << ((32 - __shft) % 32); \
77 * Given the decoded CSD structure, decode the raw CID to our CID structure.
79 static int mmc_decode_cid(struct mmc_card *card)
81 u32 *resp = card->raw_cid;
84 * The selection of the format here is based upon published
85 * specs from sandisk and from what people have reported.
87 switch (card->csd.mmca_vsn) {
88 case 0: /* MMC v1.0 - v1.2 */
89 case 1: /* MMC v1.4 */
90 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
91 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
92 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
93 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
94 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
95 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
96 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
97 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
98 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
99 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
100 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
101 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
102 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
105 case 2: /* MMC v2.0 - v2.2 */
106 case 3: /* MMC v3.1 - v3.3 */
108 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
109 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
110 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
111 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
112 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
113 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
114 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
115 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
116 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
117 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
118 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
119 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
123 pr_err("%s: card has unknown MMCA version %d\n",
124 mmc_hostname(card->host), card->csd.mmca_vsn);
131 static void mmc_set_erase_size(struct mmc_card *card)
133 if (card->ext_csd.erase_group_def & 1)
134 card->erase_size = card->ext_csd.hc_erase_size;
136 card->erase_size = card->csd.erase_size;
138 mmc_init_erase(card);
142 * Given a 128-bit response, decode to our card CSD structure.
144 static int mmc_decode_csd(struct mmc_card *card)
146 struct mmc_csd *csd = &card->csd;
147 unsigned int e, m, a, b;
148 u32 *resp = card->raw_csd;
151 * We only understand CSD structure v1.1 and v1.2.
152 * v1.2 has extra information in bits 15, 11 and 10.
153 * We also support eMMC v4.4 & v4.41.
155 csd->structure = UNSTUFF_BITS(resp, 126, 2);
156 if (csd->structure == 0) {
157 pr_err("%s: unrecognised CSD structure version %d\n",
158 mmc_hostname(card->host), csd->structure);
162 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
163 m = UNSTUFF_BITS(resp, 115, 4);
164 e = UNSTUFF_BITS(resp, 112, 3);
165 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
166 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
168 m = UNSTUFF_BITS(resp, 99, 4);
169 e = UNSTUFF_BITS(resp, 96, 3);
170 csd->max_dtr = tran_exp[e] * tran_mant[m];
171 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
173 e = UNSTUFF_BITS(resp, 47, 3);
174 m = UNSTUFF_BITS(resp, 62, 12);
175 csd->capacity = (1 + m) << (e + 2);
177 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
178 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
179 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
180 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
181 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
182 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
183 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
184 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
186 if (csd->write_blkbits >= 9) {
187 a = UNSTUFF_BITS(resp, 42, 5);
188 b = UNSTUFF_BITS(resp, 37, 5);
189 csd->erase_size = (a + 1) * (b + 1);
190 csd->erase_size <<= csd->write_blkbits - 9;
196 static void mmc_select_card_type(struct mmc_card *card)
198 struct mmc_host *host = card->host;
199 u8 card_type = card->ext_csd.raw_card_type;
200 u32 caps = host->caps, caps2 = host->caps2;
201 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
202 unsigned int avail_type = 0;
204 if (caps & MMC_CAP_MMC_HIGHSPEED &&
205 card_type & EXT_CSD_CARD_TYPE_HS_26) {
206 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
207 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
210 if (caps & MMC_CAP_MMC_HIGHSPEED &&
211 card_type & EXT_CSD_CARD_TYPE_HS_52) {
212 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
213 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
216 if (caps & MMC_CAP_1_8V_DDR &&
217 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
218 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
219 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
222 if (caps & MMC_CAP_1_2V_DDR &&
223 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
224 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
225 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
228 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
229 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
230 hs200_max_dtr = MMC_HS200_MAX_DTR;
231 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
234 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
235 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
236 hs200_max_dtr = MMC_HS200_MAX_DTR;
237 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
240 if (caps2 & MMC_CAP2_HS400_1_8V &&
241 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
242 hs200_max_dtr = MMC_HS200_MAX_DTR;
243 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
246 if (caps2 & MMC_CAP2_HS400_1_2V &&
247 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
248 hs200_max_dtr = MMC_HS200_MAX_DTR;
249 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
252 if ((caps2 & MMC_CAP2_HS400_ES) &&
253 card->ext_csd.strobe_support &&
254 (avail_type & EXT_CSD_CARD_TYPE_HS400))
255 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
257 card->ext_csd.hs_max_dtr = hs_max_dtr;
258 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
259 card->mmc_avail_type = avail_type;
262 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
264 u8 hc_erase_grp_sz, hc_wp_grp_sz;
267 * Disable these attributes by default
269 card->ext_csd.enhanced_area_offset = -EINVAL;
270 card->ext_csd.enhanced_area_size = -EINVAL;
273 * Enhanced area feature support -- check whether the eMMC
274 * card has the Enhanced area enabled. If so, export enhanced
275 * area offset and size to user by adding sysfs interface.
277 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
278 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
279 if (card->ext_csd.partition_setting_completed) {
281 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
283 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
286 * calculate the enhanced data area offset, in bytes
288 card->ext_csd.enhanced_area_offset =
289 (((unsigned long long)ext_csd[139]) << 24) +
290 (((unsigned long long)ext_csd[138]) << 16) +
291 (((unsigned long long)ext_csd[137]) << 8) +
292 (((unsigned long long)ext_csd[136]));
293 if (mmc_card_blockaddr(card))
294 card->ext_csd.enhanced_area_offset <<= 9;
296 * calculate the enhanced data area size, in kilobytes
298 card->ext_csd.enhanced_area_size =
299 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
301 card->ext_csd.enhanced_area_size *=
302 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
303 card->ext_csd.enhanced_area_size <<= 9;
305 pr_warn("%s: defines enhanced area without partition setting complete\n",
306 mmc_hostname(card->host));
311 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
314 u8 hc_erase_grp_sz, hc_wp_grp_sz;
315 unsigned int part_size;
318 * General purpose partition feature support --
319 * If ext_csd has the size of general purpose partitions,
320 * set size, part_cfg, partition name in mmc_part.
322 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
323 EXT_CSD_PART_SUPPORT_PART_EN) {
325 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
327 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
329 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
330 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
331 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
332 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
334 if (card->ext_csd.partition_setting_completed == 0) {
335 pr_warn("%s: has partition size defined without partition complete\n",
336 mmc_hostname(card->host));
340 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
342 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
344 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
345 part_size *= (size_t)(hc_erase_grp_sz *
347 mmc_part_add(card, part_size << 19,
348 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
350 MMC_BLK_DATA_AREA_GP);
355 /* Minimum partition switch timeout in milliseconds */
356 #define MMC_MIN_PART_SWITCH_TIME 300
359 * Decode extended CSD.
361 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
364 unsigned int part_size;
365 struct device_node *np;
366 bool broken_hpi = false;
368 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
369 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
370 if (card->csd.structure == 3) {
371 if (card->ext_csd.raw_ext_csd_structure > 2) {
372 pr_err("%s: unrecognised EXT_CSD structure "
373 "version %d\n", mmc_hostname(card->host),
374 card->ext_csd.raw_ext_csd_structure);
380 np = mmc_of_find_child_device(card->host, 0);
381 if (np && of_device_is_compatible(np, "mmc-card"))
382 broken_hpi = of_property_read_bool(np, "broken-hpi");
386 * The EXT_CSD format is meant to be forward compatible. As long
387 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
388 * are authorized, see JEDEC JESD84-B50 section B.8.
390 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
392 /* fixup device after ext_csd revision field is updated */
393 mmc_fixup_device(card, mmc_ext_csd_fixups);
395 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
396 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
397 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
398 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
399 if (card->ext_csd.rev >= 2) {
400 card->ext_csd.sectors =
401 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
402 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
403 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
404 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
406 /* Cards with density > 2GiB are sector addressed */
407 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
408 mmc_card_set_blockaddr(card);
411 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
412 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
413 mmc_select_card_type(card);
415 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
416 card->ext_csd.raw_erase_timeout_mult =
417 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
418 card->ext_csd.raw_hc_erase_grp_size =
419 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
420 if (card->ext_csd.rev >= 3) {
421 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
422 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
424 /* EXT_CSD value is in units of 10ms, but we store in ms */
425 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
427 /* Sleep / awake timeout in 100ns units */
428 if (sa_shift > 0 && sa_shift <= 0x17)
429 card->ext_csd.sa_timeout =
430 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
431 card->ext_csd.erase_group_def =
432 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
433 card->ext_csd.hc_erase_timeout = 300 *
434 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
435 card->ext_csd.hc_erase_size =
436 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
438 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
441 * There are two boot regions of equal size, defined in
444 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
445 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
446 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
447 mmc_part_add(card, part_size,
448 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
450 MMC_BLK_DATA_AREA_BOOT);
455 card->ext_csd.raw_hc_erase_gap_size =
456 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
457 card->ext_csd.raw_sec_trim_mult =
458 ext_csd[EXT_CSD_SEC_TRIM_MULT];
459 card->ext_csd.raw_sec_erase_mult =
460 ext_csd[EXT_CSD_SEC_ERASE_MULT];
461 card->ext_csd.raw_sec_feature_support =
462 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
463 card->ext_csd.raw_trim_mult =
464 ext_csd[EXT_CSD_TRIM_MULT];
465 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
466 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
467 if (card->ext_csd.rev >= 4) {
468 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
469 EXT_CSD_PART_SETTING_COMPLETED)
470 card->ext_csd.partition_setting_completed = 1;
472 card->ext_csd.partition_setting_completed = 0;
474 mmc_manage_enhanced_area(card, ext_csd);
476 mmc_manage_gp_partitions(card, ext_csd);
478 card->ext_csd.sec_trim_mult =
479 ext_csd[EXT_CSD_SEC_TRIM_MULT];
480 card->ext_csd.sec_erase_mult =
481 ext_csd[EXT_CSD_SEC_ERASE_MULT];
482 card->ext_csd.sec_feature_support =
483 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
484 card->ext_csd.trim_timeout = 300 *
485 ext_csd[EXT_CSD_TRIM_MULT];
488 * Note that the call to mmc_part_add above defaults to read
489 * only. If this default assumption is changed, the call must
490 * take into account the value of boot_locked below.
492 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
493 card->ext_csd.boot_ro_lockable = true;
495 /* Save power class values */
496 card->ext_csd.raw_pwr_cl_52_195 =
497 ext_csd[EXT_CSD_PWR_CL_52_195];
498 card->ext_csd.raw_pwr_cl_26_195 =
499 ext_csd[EXT_CSD_PWR_CL_26_195];
500 card->ext_csd.raw_pwr_cl_52_360 =
501 ext_csd[EXT_CSD_PWR_CL_52_360];
502 card->ext_csd.raw_pwr_cl_26_360 =
503 ext_csd[EXT_CSD_PWR_CL_26_360];
504 card->ext_csd.raw_pwr_cl_200_195 =
505 ext_csd[EXT_CSD_PWR_CL_200_195];
506 card->ext_csd.raw_pwr_cl_200_360 =
507 ext_csd[EXT_CSD_PWR_CL_200_360];
508 card->ext_csd.raw_pwr_cl_ddr_52_195 =
509 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
510 card->ext_csd.raw_pwr_cl_ddr_52_360 =
511 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
512 card->ext_csd.raw_pwr_cl_ddr_200_360 =
513 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
516 if (card->ext_csd.rev >= 5) {
517 /* Adjust production date as per JEDEC JESD84-B451 */
518 if (card->cid.year < 2010)
519 card->cid.year += 16;
521 /* check whether the eMMC card supports BKOPS */
522 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
523 card->ext_csd.bkops = 1;
524 card->ext_csd.man_bkops_en =
525 (ext_csd[EXT_CSD_BKOPS_EN] &
526 EXT_CSD_MANUAL_BKOPS_MASK);
527 card->ext_csd.raw_bkops_status =
528 ext_csd[EXT_CSD_BKOPS_STATUS];
529 if (!card->ext_csd.man_bkops_en)
530 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
531 mmc_hostname(card->host));
534 /* check whether the eMMC card supports HPI */
535 if (!mmc_card_broken_hpi(card) &&
536 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
537 card->ext_csd.hpi = 1;
538 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
539 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
541 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
543 * Indicate the maximum timeout to close
544 * a command interrupted by HPI
546 card->ext_csd.out_of_int_time =
547 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
550 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
551 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
554 * RPMB regions are defined in multiples of 128K.
556 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
557 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
558 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
559 EXT_CSD_PART_CONFIG_ACC_RPMB,
561 MMC_BLK_DATA_AREA_RPMB);
565 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
566 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
567 card->erased_byte = 0xFF;
569 card->erased_byte = 0x0;
571 /* eMMC v4.5 or later */
572 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
573 if (card->ext_csd.rev >= 6) {
574 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
576 card->ext_csd.generic_cmd6_time = 10 *
577 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
578 card->ext_csd.power_off_longtime = 10 *
579 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
581 card->ext_csd.cache_size =
582 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
583 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
584 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
585 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
587 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
588 card->ext_csd.data_sector_size = 4096;
590 card->ext_csd.data_sector_size = 512;
592 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
593 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
594 card->ext_csd.data_tag_unit_size =
595 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
596 (card->ext_csd.data_sector_size);
598 card->ext_csd.data_tag_unit_size = 0;
601 card->ext_csd.max_packed_writes =
602 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
603 card->ext_csd.max_packed_reads =
604 ext_csd[EXT_CSD_MAX_PACKED_READS];
606 card->ext_csd.data_sector_size = 512;
610 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
611 * when accessing a specific field", so use it here if there is no
612 * PARTITION_SWITCH_TIME.
614 if (!card->ext_csd.part_time)
615 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
616 /* Some eMMC set the value too low so set a minimum */
617 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
618 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
620 /* eMMC v5 or later */
621 if (card->ext_csd.rev >= 7) {
622 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
624 card->ext_csd.ffu_capable =
625 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
626 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
632 static int mmc_read_ext_csd(struct mmc_card *card)
637 if (!mmc_can_ext_csd(card))
640 err = mmc_get_ext_csd(card, &ext_csd);
642 /* If the host or the card can't do the switch,
643 * fail more gracefully. */
650 * High capacity cards should have this "magic" size
651 * stored in their CSD.
653 if (card->csd.capacity == (4096 * 512)) {
654 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
655 mmc_hostname(card->host));
657 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
658 mmc_hostname(card->host));
665 err = mmc_decode_ext_csd(card, ext_csd);
670 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
675 if (bus_width == MMC_BUS_WIDTH_1)
678 err = mmc_get_ext_csd(card, &bw_ext_csd);
682 /* only compare read only fields */
683 err = !((card->ext_csd.raw_partition_support ==
684 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
685 (card->ext_csd.raw_erased_mem_count ==
686 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
687 (card->ext_csd.rev ==
688 bw_ext_csd[EXT_CSD_REV]) &&
689 (card->ext_csd.raw_ext_csd_structure ==
690 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
691 (card->ext_csd.raw_card_type ==
692 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
693 (card->ext_csd.raw_s_a_timeout ==
694 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
695 (card->ext_csd.raw_hc_erase_gap_size ==
696 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
697 (card->ext_csd.raw_erase_timeout_mult ==
698 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
699 (card->ext_csd.raw_hc_erase_grp_size ==
700 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
701 (card->ext_csd.raw_sec_trim_mult ==
702 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
703 (card->ext_csd.raw_sec_erase_mult ==
704 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
705 (card->ext_csd.raw_sec_feature_support ==
706 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
707 (card->ext_csd.raw_trim_mult ==
708 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
709 (card->ext_csd.raw_sectors[0] ==
710 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
711 (card->ext_csd.raw_sectors[1] ==
712 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
713 (card->ext_csd.raw_sectors[2] ==
714 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
715 (card->ext_csd.raw_sectors[3] ==
716 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
717 (card->ext_csd.raw_pwr_cl_52_195 ==
718 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
719 (card->ext_csd.raw_pwr_cl_26_195 ==
720 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
721 (card->ext_csd.raw_pwr_cl_52_360 ==
722 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
723 (card->ext_csd.raw_pwr_cl_26_360 ==
724 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
725 (card->ext_csd.raw_pwr_cl_200_195 ==
726 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
727 (card->ext_csd.raw_pwr_cl_200_360 ==
728 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
729 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
730 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
731 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
732 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
733 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
734 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
743 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
744 card->raw_cid[2], card->raw_cid[3]);
745 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
746 card->raw_csd[2], card->raw_csd[3]);
747 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
748 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
749 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
750 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
751 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
752 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
753 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
754 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
755 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
756 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
757 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
758 card->ext_csd.enhanced_area_offset);
759 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
760 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
761 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
762 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
764 static ssize_t mmc_fwrev_show(struct device *dev,
765 struct device_attribute *attr,
768 struct mmc_card *card = mmc_dev_to_card(dev);
770 if (card->ext_csd.rev < 7) {
771 return sprintf(buf, "0x%x\n", card->cid.fwrev);
773 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
774 card->ext_csd.fwrev);
778 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
780 static ssize_t mmc_dsr_show(struct device *dev,
781 struct device_attribute *attr,
784 struct mmc_card *card = mmc_dev_to_card(dev);
785 struct mmc_host *host = card->host;
787 if (card->csd.dsr_imp && host->dsr_req)
788 return sprintf(buf, "0x%x\n", host->dsr);
790 /* return default DSR value */
791 return sprintf(buf, "0x%x\n", 0x404);
794 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
796 static struct attribute *mmc_std_attrs[] = {
800 &dev_attr_erase_size.attr,
801 &dev_attr_preferred_erase_size.attr,
802 &dev_attr_fwrev.attr,
803 &dev_attr_ffu_capable.attr,
804 &dev_attr_hwrev.attr,
805 &dev_attr_manfid.attr,
807 &dev_attr_oemid.attr,
809 &dev_attr_serial.attr,
810 &dev_attr_enhanced_area_offset.attr,
811 &dev_attr_enhanced_area_size.attr,
812 &dev_attr_raw_rpmb_size_mult.attr,
813 &dev_attr_rel_sectors.attr,
818 ATTRIBUTE_GROUPS(mmc_std);
820 static struct device_type mmc_type = {
821 .groups = mmc_std_groups,
825 * Select the PowerClass for the current bus width
826 * If power class is defined for 4/8 bit bus in the
827 * extended CSD register, select it by executing the
828 * mmc_switch command.
830 static int __mmc_select_powerclass(struct mmc_card *card,
831 unsigned int bus_width)
833 struct mmc_host *host = card->host;
834 struct mmc_ext_csd *ext_csd = &card->ext_csd;
835 unsigned int pwrclass_val = 0;
838 switch (1 << host->ios.vdd) {
839 case MMC_VDD_165_195:
840 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
841 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
842 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
843 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
844 ext_csd->raw_pwr_cl_52_195 :
845 ext_csd->raw_pwr_cl_ddr_52_195;
846 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
847 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
858 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
859 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
860 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
861 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
862 ext_csd->raw_pwr_cl_52_360 :
863 ext_csd->raw_pwr_cl_ddr_52_360;
864 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
865 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
866 ext_csd->raw_pwr_cl_ddr_200_360 :
867 ext_csd->raw_pwr_cl_200_360;
870 pr_warn("%s: Voltage range not supported for power class\n",
875 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
876 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
877 EXT_CSD_PWR_CL_8BIT_SHIFT;
879 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
880 EXT_CSD_PWR_CL_4BIT_SHIFT;
882 /* If the power class is different from the default value */
883 if (pwrclass_val > 0) {
884 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
887 card->ext_csd.generic_cmd6_time);
893 static int mmc_select_powerclass(struct mmc_card *card)
895 struct mmc_host *host = card->host;
896 u32 bus_width, ext_csd_bits;
899 /* Power class selection is supported for versions >= 4.0 */
900 if (!mmc_can_ext_csd(card))
903 bus_width = host->ios.bus_width;
904 /* Power class values are defined only for 4/8 bit bus */
905 if (bus_width == MMC_BUS_WIDTH_1)
908 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
910 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
911 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
913 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
914 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
916 err = __mmc_select_powerclass(card, ext_csd_bits);
918 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
919 mmc_hostname(host), 1 << bus_width, ddr);
925 * Set the bus speed for the selected speed mode.
927 static void mmc_set_bus_speed(struct mmc_card *card)
929 unsigned int max_dtr = (unsigned int)-1;
931 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
932 max_dtr > card->ext_csd.hs200_max_dtr)
933 max_dtr = card->ext_csd.hs200_max_dtr;
934 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
935 max_dtr = card->ext_csd.hs_max_dtr;
936 else if (max_dtr > card->csd.max_dtr)
937 max_dtr = card->csd.max_dtr;
939 mmc_set_clock(card->host, max_dtr);
943 * Select the bus width amoung 4-bit and 8-bit(SDR).
944 * If the bus width is changed successfully, return the selected width value.
945 * Zero is returned instead of error value if the wide width is not supported.
947 static int mmc_select_bus_width(struct mmc_card *card)
949 static unsigned ext_csd_bits[] = {
953 static unsigned bus_widths[] = {
957 struct mmc_host *host = card->host;
958 unsigned idx, bus_width = 0;
961 if (!mmc_can_ext_csd(card) ||
962 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
965 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
968 * Unlike SD, MMC cards dont have a configuration register to notify
969 * supported bus width. So bus test command should be run to identify
970 * the supported bus width or compare the ext csd values of current
971 * bus width and ext csd values of 1 bit mode read earlier.
973 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
975 * Host is capable of 8bit transfer, then switch
976 * the device to work in 8bit transfer mode. If the
977 * mmc switch command returns error then switch to
978 * 4bit transfer mode. On success set the corresponding
979 * bus width on the host.
981 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
984 card->ext_csd.generic_cmd6_time);
988 bus_width = bus_widths[idx];
989 mmc_set_bus_width(host, bus_width);
992 * If controller can't handle bus width test,
993 * compare ext_csd previously read in 1 bit mode
994 * against ext_csd at new bus width
996 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
997 err = mmc_compare_ext_csds(card, bus_width);
999 err = mmc_bus_test(card, bus_width);
1005 pr_warn("%s: switch to bus width %d failed\n",
1006 mmc_hostname(host), 1 << bus_width);
1013 /* Caller must hold re-tuning */
1014 static int mmc_switch_status(struct mmc_card *card)
1019 err = mmc_send_status(card, &status);
1023 return mmc_switch_status_error(card->host, status);
1027 * Switch to the high-speed mode
1029 static int mmc_select_hs(struct mmc_card *card)
1033 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1034 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1035 card->ext_csd.generic_cmd6_time,
1038 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1039 err = mmc_switch_status(card);
1043 pr_warn("%s: switch to high-speed failed, err:%d\n",
1044 mmc_hostname(card->host), err);
1050 * Activate wide bus and DDR if supported.
1052 static int mmc_select_hs_ddr(struct mmc_card *card)
1054 struct mmc_host *host = card->host;
1055 u32 bus_width, ext_csd_bits;
1058 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1061 bus_width = host->ios.bus_width;
1062 if (bus_width == MMC_BUS_WIDTH_1)
1065 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1066 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1068 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1071 card->ext_csd.generic_cmd6_time);
1073 pr_err("%s: switch to bus width %d ddr failed\n",
1074 mmc_hostname(host), 1 << bus_width);
1079 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1082 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1084 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1085 * in the JEDEC spec for DDR.
1087 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1088 * host controller can support this, like some of the SDHCI
1089 * controller which connect to an eMMC device. Some of these
1090 * host controller still needs to use 1.8v vccq for supporting
1093 * So the sequence will be:
1094 * if (host and device can both support 1.2v IO)
1096 * else if (host and device can both support 1.8v IO)
1098 * so if host and device can only support 3.3v IO, this is the
1101 * WARNING: eMMC rules are NOT the same as SD DDR
1104 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1105 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1107 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1108 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1110 /* make sure vccq is 3.3v after switching disaster */
1112 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1115 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1120 static int mmc_select_hs400(struct mmc_card *card)
1122 struct mmc_host *host = card->host;
1123 unsigned int max_dtr;
1128 * HS400 mode requires 8-bit bus width
1130 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1131 host->ios.bus_width == MMC_BUS_WIDTH_8))
1134 /* Switch card to HS mode */
1135 val = EXT_CSD_TIMING_HS;
1136 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1137 EXT_CSD_HS_TIMING, val,
1138 card->ext_csd.generic_cmd6_time,
1141 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1142 mmc_hostname(host), err);
1146 /* Set host controller to HS timing */
1147 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1149 /* Reduce frequency to HS frequency */
1150 max_dtr = card->ext_csd.hs_max_dtr;
1151 mmc_set_clock(host, max_dtr);
1153 err = mmc_switch_status(card);
1157 /* Switch card to DDR */
1158 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1160 EXT_CSD_DDR_BUS_WIDTH_8,
1161 card->ext_csd.generic_cmd6_time);
1163 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1164 mmc_hostname(host), err);
1168 /* Switch card to HS400 */
1169 val = EXT_CSD_TIMING_HS400 |
1170 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1171 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1172 EXT_CSD_HS_TIMING, val,
1173 card->ext_csd.generic_cmd6_time,
1176 pr_err("%s: switch to hs400 failed, err:%d\n",
1177 mmc_hostname(host), err);
1181 /* Set host controller to HS400 timing and frequency */
1182 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1183 mmc_set_bus_speed(card);
1185 err = mmc_switch_status(card);
1192 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1197 int mmc_hs200_to_hs400(struct mmc_card *card)
1199 return mmc_select_hs400(card);
1202 int mmc_hs400_to_hs200(struct mmc_card *card)
1204 struct mmc_host *host = card->host;
1205 unsigned int max_dtr;
1209 /* Reduce frequency to HS */
1210 max_dtr = card->ext_csd.hs_max_dtr;
1211 mmc_set_clock(host, max_dtr);
1213 /* Switch HS400 to HS DDR */
1214 val = EXT_CSD_TIMING_HS;
1215 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1216 val, card->ext_csd.generic_cmd6_time,
1221 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1223 err = mmc_switch_status(card);
1227 /* Switch HS DDR to HS */
1228 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1229 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1234 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1236 err = mmc_switch_status(card);
1240 /* Switch HS to HS200 */
1241 val = EXT_CSD_TIMING_HS200 |
1242 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1243 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1244 val, card->ext_csd.generic_cmd6_time,
1249 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1251 err = mmc_switch_status(card);
1255 mmc_set_bus_speed(card);
1260 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1265 static void mmc_select_driver_type(struct mmc_card *card)
1267 int card_drv_type, drive_strength, drv_type;
1269 card_drv_type = card->ext_csd.raw_driver_strength |
1270 mmc_driver_type_mask(0);
1272 drive_strength = mmc_select_drive_strength(card,
1273 card->ext_csd.hs200_max_dtr,
1274 card_drv_type, &drv_type);
1276 card->drive_strength = drive_strength;
1279 mmc_set_driver_type(card->host, drv_type);
1282 static int mmc_select_hs400es(struct mmc_card *card)
1284 struct mmc_host *host = card->host;
1288 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1293 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1294 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1296 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1297 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1299 /* If fails try again during next card power cycle */
1303 err = mmc_select_bus_width(card);
1307 /* Switch card to HS mode */
1308 err = mmc_select_hs(card);
1312 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1314 err = mmc_switch_status(card);
1318 /* Switch card to DDR with strobe bit */
1319 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1320 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1323 card->ext_csd.generic_cmd6_time);
1325 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1326 mmc_hostname(host), err);
1330 mmc_select_driver_type(card);
1332 /* Switch card to HS400 */
1333 val = EXT_CSD_TIMING_HS400 |
1334 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1335 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1336 EXT_CSD_HS_TIMING, val,
1337 card->ext_csd.generic_cmd6_time,
1340 pr_err("%s: switch to hs400es failed, err:%d\n",
1341 mmc_hostname(host), err);
1345 /* Set host controller to HS400 timing and frequency */
1346 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1348 /* Controller enable enhanced strobe function */
1349 host->ios.enhanced_strobe = true;
1350 if (host->ops->hs400_enhanced_strobe)
1351 host->ops->hs400_enhanced_strobe(host, &host->ios);
1353 err = mmc_switch_status(card);
1360 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1366 * For device supporting HS200 mode, the following sequence
1367 * should be done before executing the tuning process.
1368 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1369 * 2. switch to HS200 mode
1370 * 3. set the clock to > 52Mhz and <=200MHz
1372 static int mmc_select_hs200(struct mmc_card *card)
1374 struct mmc_host *host = card->host;
1375 unsigned int old_timing, old_signal_voltage;
1379 old_signal_voltage = host->ios.signal_voltage;
1380 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1381 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1383 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1384 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1386 /* If fails try again during next card power cycle */
1390 mmc_select_driver_type(card);
1393 * Set the bus width(4 or 8) with host's support and
1394 * switch to HS200 mode if bus width is set successfully.
1396 err = mmc_select_bus_width(card);
1398 val = EXT_CSD_TIMING_HS200 |
1399 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1400 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1401 EXT_CSD_HS_TIMING, val,
1402 card->ext_csd.generic_cmd6_time,
1406 old_timing = host->ios.timing;
1407 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1409 err = mmc_switch_status(card);
1411 * mmc_select_timing() assumes timing has not changed if
1412 * it is a switch error.
1414 if (err == -EBADMSG)
1415 mmc_set_timing(host, old_timing);
1419 /* fall back to the old signal voltage, if fails report error */
1420 if (__mmc_set_signal_voltage(host, old_signal_voltage))
1423 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1430 * Activate High Speed, HS200 or HS400ES mode if supported.
1432 static int mmc_select_timing(struct mmc_card *card)
1436 if (!mmc_can_ext_csd(card))
1439 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1440 err = mmc_select_hs400es(card);
1441 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1442 err = mmc_select_hs200(card);
1443 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1444 err = mmc_select_hs(card);
1446 if (err && err != -EBADMSG)
1451 * Set the bus speed to the selected bus timing.
1452 * If timing is not selected, backward compatible is the default.
1454 mmc_set_bus_speed(card);
1459 * Execute tuning sequence to seek the proper bus operating
1460 * conditions for HS200 and HS400, which sends CMD21 to the device.
1462 static int mmc_hs200_tuning(struct mmc_card *card)
1464 struct mmc_host *host = card->host;
1467 * Timing should be adjusted to the HS400 target
1468 * operation frequency for tuning process
1470 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1471 host->ios.bus_width == MMC_BUS_WIDTH_8)
1472 if (host->ops->prepare_hs400_tuning)
1473 host->ops->prepare_hs400_tuning(host, &host->ios);
1475 return mmc_execute_tuning(card);
1479 * Handle the detection and initialisation of a card.
1481 * In the case of a resume, "oldcard" will contain the card
1482 * we're trying to reinitialise.
1484 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1485 struct mmc_card *oldcard)
1487 struct mmc_card *card;
1493 WARN_ON(!host->claimed);
1495 /* Set correct bus mode for MMC before attempting init */
1496 if (!mmc_host_is_spi(host))
1497 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1500 * Since we're changing the OCR value, we seem to
1501 * need to tell some cards to go back to the idle
1502 * state. We wait 1ms to give cards time to
1504 * mmc_go_idle is needed for eMMC that are asleep
1508 /* The extra bit indicates that we support high capacity */
1509 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1514 * For SPI, enable CRC as appropriate.
1516 if (mmc_host_is_spi(host)) {
1517 err = mmc_spi_set_crc(host, use_spi_crc);
1523 * Fetch CID from card.
1525 if (mmc_host_is_spi(host))
1526 err = mmc_send_cid(host, cid);
1528 err = mmc_all_send_cid(host, cid);
1533 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1541 * Allocate card structure.
1543 card = mmc_alloc_card(host, &mmc_type);
1545 err = PTR_ERR(card);
1550 card->type = MMC_TYPE_MMC;
1552 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1556 * Call the optional HC's init_card function to handle quirks.
1558 if (host->ops->init_card)
1559 host->ops->init_card(host, card);
1562 * For native busses: set card RCA and quit open drain mode.
1564 if (!mmc_host_is_spi(host)) {
1565 err = mmc_set_relative_addr(card);
1569 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1574 * Fetch CSD from card.
1576 err = mmc_send_csd(card, card->raw_csd);
1580 err = mmc_decode_csd(card);
1583 err = mmc_decode_cid(card);
1589 * handling only for cards supporting DSR and hosts requesting
1592 if (card->csd.dsr_imp && host->dsr_req)
1596 * Select card, as all following commands rely on that.
1598 if (!mmc_host_is_spi(host)) {
1599 err = mmc_select_card(card);
1605 /* Read extended CSD. */
1606 err = mmc_read_ext_csd(card);
1611 * If doing byte addressing, check if required to do sector
1612 * addressing. Handle the case of <2GB cards needing sector
1613 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1614 * ocr register has bit 30 set for sector addressing.
1617 mmc_card_set_blockaddr(card);
1619 /* Erase size depends on CSD and Extended CSD */
1620 mmc_set_erase_size(card);
1624 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1625 * bit. This bit will be lost every time after a reset or power off.
1627 if (card->ext_csd.partition_setting_completed ||
1628 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1629 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1630 EXT_CSD_ERASE_GROUP_DEF, 1,
1631 card->ext_csd.generic_cmd6_time);
1633 if (err && err != -EBADMSG)
1639 * Just disable enhanced area off & sz
1640 * will try to enable ERASE_GROUP_DEF
1641 * during next time reinit
1643 card->ext_csd.enhanced_area_offset = -EINVAL;
1644 card->ext_csd.enhanced_area_size = -EINVAL;
1646 card->ext_csd.erase_group_def = 1;
1648 * enable ERASE_GRP_DEF successfully.
1649 * This will affect the erase size, so
1650 * here need to reset erase size
1652 mmc_set_erase_size(card);
1657 * Ensure eMMC user default partition is enabled
1659 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1660 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1661 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1662 card->ext_csd.part_config,
1663 card->ext_csd.part_time);
1664 if (err && err != -EBADMSG)
1669 * Enable power_off_notification byte in the ext_csd register
1671 if (card->ext_csd.rev >= 6) {
1672 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1673 EXT_CSD_POWER_OFF_NOTIFICATION,
1675 card->ext_csd.generic_cmd6_time);
1676 if (err && err != -EBADMSG)
1680 * The err can be -EBADMSG or 0,
1681 * so check for success and update the flag
1684 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1688 * Select timing interface
1690 err = mmc_select_timing(card);
1694 if (mmc_card_hs200(card)) {
1695 err = mmc_hs200_tuning(card);
1699 err = mmc_select_hs400(card);
1702 } else if (!mmc_card_hs400es(card)) {
1703 /* Select the desired bus width optionally */
1704 err = mmc_select_bus_width(card);
1705 if (err > 0 && mmc_card_hs(card)) {
1706 err = mmc_select_hs_ddr(card);
1713 * Choose the power class with selected bus interface
1715 mmc_select_powerclass(card);
1718 * Enable HPI feature (if supported)
1720 if (card->ext_csd.hpi) {
1721 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1722 EXT_CSD_HPI_MGMT, 1,
1723 card->ext_csd.generic_cmd6_time);
1724 if (err && err != -EBADMSG)
1727 pr_warn("%s: Enabling HPI failed\n",
1728 mmc_hostname(card->host));
1729 card->ext_csd.hpi_en = 0;
1732 card->ext_csd.hpi_en = 1;
1737 * If cache size is higher than 0, this indicates the existence of cache
1738 * and it can be turned on. Note that some eMMCs from Micron has been
1739 * reported to need ~800 ms timeout, while enabling the cache after
1740 * sudden power failure tests. Let's extend the timeout to a minimum of
1741 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1743 if (card->ext_csd.cache_size > 0) {
1744 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1746 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1747 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1748 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1749 if (err && err != -EBADMSG)
1753 * Only if no error, cache is turned on successfully.
1756 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1757 mmc_hostname(card->host), err);
1758 card->ext_csd.cache_ctrl = 0;
1761 card->ext_csd.cache_ctrl = 1;
1766 * The mandatory minimum values are defined for packed command.
1769 if (card->ext_csd.max_packed_writes >= 3 &&
1770 card->ext_csd.max_packed_reads >= 5 &&
1771 host->caps2 & MMC_CAP2_PACKED_CMD) {
1772 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1773 EXT_CSD_EXP_EVENTS_CTRL,
1774 EXT_CSD_PACKED_EVENT_EN,
1775 card->ext_csd.generic_cmd6_time);
1776 if (err && err != -EBADMSG)
1779 pr_warn("%s: Enabling packed event failed\n",
1780 mmc_hostname(card->host));
1781 card->ext_csd.packed_event_en = 0;
1784 card->ext_csd.packed_event_en = 1;
1795 mmc_remove_card(card);
1800 static int mmc_can_sleep(struct mmc_card *card)
1802 return (card && card->ext_csd.rev >= 3);
1805 static int mmc_sleep(struct mmc_host *host)
1807 struct mmc_command cmd = {0};
1808 struct mmc_card *card = host->card;
1809 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1812 /* Re-tuning can't be done once the card is deselected */
1813 mmc_retune_hold(host);
1815 err = mmc_deselect_cards(host);
1819 cmd.opcode = MMC_SLEEP_AWAKE;
1820 cmd.arg = card->rca << 16;
1824 * If the max_busy_timeout of the host is specified, validate it against
1825 * the sleep cmd timeout. A failure means we need to prevent the host
1826 * from doing hw busy detection, which is done by converting to a R1
1827 * response instead of a R1B.
1829 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1830 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1832 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1833 cmd.busy_timeout = timeout_ms;
1836 err = mmc_wait_for_cmd(host, &cmd, 0);
1841 * If the host does not wait while the card signals busy, then we will
1842 * will have to wait the sleep/awake timeout. Note, we cannot use the
1843 * SEND_STATUS command to poll the status because that command (and most
1844 * others) is invalid while the card sleeps.
1846 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1847 mmc_delay(timeout_ms);
1850 mmc_retune_release(host);
1854 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1857 mmc_card_mmc(card) &&
1858 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1861 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1863 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1866 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1867 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1868 timeout = card->ext_csd.power_off_longtime;
1870 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1871 EXT_CSD_POWER_OFF_NOTIFICATION,
1872 notify_type, timeout, true, false, false);
1874 pr_err("%s: Power Off Notification timed out, %u\n",
1875 mmc_hostname(card->host), timeout);
1877 /* Disable the power off notification after the switch operation. */
1878 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1884 * Host is being removed. Free up the current card.
1886 static void mmc_remove(struct mmc_host *host)
1889 BUG_ON(!host->card);
1891 mmc_remove_card(host->card);
1896 * Card detection - card is alive.
1898 static int mmc_alive(struct mmc_host *host)
1900 return mmc_send_status(host->card, NULL);
1904 * Card detection callback from host.
1906 static void mmc_detect(struct mmc_host *host)
1911 BUG_ON(!host->card);
1913 mmc_get_card(host->card);
1916 * Just check if our card has been removed.
1918 err = _mmc_detect_card_removed(host);
1920 mmc_put_card(host->card);
1925 mmc_claim_host(host);
1926 mmc_detach_bus(host);
1927 mmc_power_off(host);
1928 mmc_release_host(host);
1932 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1935 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1936 EXT_CSD_POWER_OFF_LONG;
1939 BUG_ON(!host->card);
1941 mmc_claim_host(host);
1943 if (mmc_card_suspended(host->card))
1946 if (mmc_card_doing_bkops(host->card)) {
1947 err = mmc_stop_bkops(host->card);
1952 err = mmc_flush_cache(host->card);
1956 if (mmc_can_poweroff_notify(host->card) &&
1957 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1958 err = mmc_poweroff_notify(host->card, notify_type);
1959 else if (mmc_can_sleep(host->card))
1960 err = mmc_sleep(host);
1961 else if (!mmc_host_is_spi(host))
1962 err = mmc_deselect_cards(host);
1965 mmc_power_off(host);
1966 mmc_card_set_suspended(host->card);
1969 mmc_release_host(host);
1976 static int mmc_suspend(struct mmc_host *host)
1980 err = _mmc_suspend(host, true);
1982 pm_runtime_disable(&host->card->dev);
1983 pm_runtime_set_suspended(&host->card->dev);
1990 * This function tries to determine if the same card is still present
1991 * and, if so, restore all state to it.
1993 static int _mmc_resume(struct mmc_host *host)
1998 BUG_ON(!host->card);
2000 mmc_claim_host(host);
2002 if (!mmc_card_suspended(host->card))
2005 mmc_power_up(host, host->card->ocr);
2006 err = mmc_init_card(host, host->card->ocr, host->card);
2007 mmc_card_clr_suspended(host->card);
2010 mmc_release_host(host);
2017 static int mmc_shutdown(struct mmc_host *host)
2022 * In a specific case for poweroff notify, we need to resume the card
2023 * before we can shutdown it properly.
2025 if (mmc_can_poweroff_notify(host->card) &&
2026 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2027 err = _mmc_resume(host);
2030 err = _mmc_suspend(host, false);
2036 * Callback for resume.
2038 static int mmc_resume(struct mmc_host *host)
2040 pm_runtime_enable(&host->card->dev);
2045 * Callback for runtime_suspend.
2047 static int mmc_runtime_suspend(struct mmc_host *host)
2051 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2054 err = _mmc_suspend(host, true);
2056 pr_err("%s: error %d doing aggressive suspend\n",
2057 mmc_hostname(host), err);
2063 * Callback for runtime_resume.
2065 static int mmc_runtime_resume(struct mmc_host *host)
2069 err = _mmc_resume(host);
2070 if (err && err != -ENOMEDIUM)
2071 pr_err("%s: error %d doing runtime resume\n",
2072 mmc_hostname(host), err);
2077 int mmc_can_reset(struct mmc_card *card)
2081 rst_n_function = card->ext_csd.rst_n_function;
2082 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2086 EXPORT_SYMBOL(mmc_can_reset);
2088 static int mmc_reset(struct mmc_host *host)
2090 struct mmc_card *card = host->card;
2093 * In the case of recovery, we can't expect flushing the cache to work
2094 * always, but we have a go and ignore errors.
2096 mmc_flush_cache(host->card);
2098 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2099 mmc_can_reset(card)) {
2100 /* If the card accept RST_n signal, send it. */
2101 mmc_set_clock(host, host->f_init);
2102 host->ops->hw_reset(host);
2103 /* Set initial state and call mmc_set_ios */
2104 mmc_set_initial_state(host);
2106 /* Do a brute force power cycle */
2107 mmc_power_cycle(host, card->ocr);
2109 return mmc_init_card(host, card->ocr, card);
2112 static const struct mmc_bus_ops mmc_ops = {
2113 .remove = mmc_remove,
2114 .detect = mmc_detect,
2115 .suspend = mmc_suspend,
2116 .resume = mmc_resume,
2117 .runtime_suspend = mmc_runtime_suspend,
2118 .runtime_resume = mmc_runtime_resume,
2120 .shutdown = mmc_shutdown,
2125 * Starting point for MMC card init.
2127 int mmc_attach_mmc(struct mmc_host *host)
2133 WARN_ON(!host->claimed);
2135 /* Set correct bus mode for MMC before attempting attach */
2136 if (!mmc_host_is_spi(host))
2137 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2139 err = mmc_send_op_cond(host, 0, &ocr);
2143 mmc_attach_bus(host, &mmc_ops);
2144 if (host->ocr_avail_mmc)
2145 host->ocr_avail = host->ocr_avail_mmc;
2148 * We need to get OCR a different way for SPI.
2150 if (mmc_host_is_spi(host)) {
2151 err = mmc_spi_read_ocr(host, 1, &ocr);
2156 rocr = mmc_select_voltage(host, ocr);
2159 * Can we support the voltage of the card?
2167 * Detect and init the card.
2169 err = mmc_init_card(host, rocr, NULL);
2173 mmc_release_host(host);
2174 err = mmc_add_card(host->card);
2178 mmc_claim_host(host);
2182 mmc_remove_card(host->card);
2183 mmc_claim_host(host);
2186 mmc_detach_bus(host);
2188 pr_err("%s: error %d whilst initialising MMC card\n",
2189 mmc_hostname(host), err);