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 static const unsigned int tran_exp[] = {
30 10000, 100000, 1000000, 10000000,
34 static const unsigned char tran_mant[] = {
35 0, 10, 12, 13, 15, 20, 25, 30,
36 35, 40, 45, 50, 55, 60, 70, 80,
39 static const unsigned int tacc_exp[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
43 static const unsigned int tacc_mant[] = {
44 0, 10, 12, 13, 15, 20, 25, 30,
45 35, 40, 45, 50, 55, 60, 70, 80,
48 #define UNSTUFF_BITS(resp,start,size) \
50 const int __size = size; \
51 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
52 const int __off = 3 - ((start) / 32); \
53 const int __shft = (start) & 31; \
56 __res = resp[__off] >> __shft; \
57 if (__size + __shft > 32) \
58 __res |= resp[__off-1] << ((32 - __shft) % 32); \
63 * Given the decoded CSD structure, decode the raw CID to our CID structure.
65 static int mmc_decode_cid(struct mmc_card *card)
67 u32 *resp = card->raw_cid;
70 * The selection of the format here is based upon published
71 * specs from sandisk and from what people have reported.
73 switch (card->csd.mmca_vsn) {
74 case 0: /* MMC v1.0 - v1.2 */
75 case 1: /* MMC v1.4 */
76 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
77 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
78 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
79 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
80 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
81 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
82 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
83 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
84 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
85 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
86 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
87 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
88 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
91 case 2: /* MMC v2.0 - v2.2 */
92 case 3: /* MMC v3.1 - v3.3 */
94 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
95 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
96 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
97 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
98 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
99 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
100 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
101 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
102 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
103 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
104 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
105 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
109 pr_err("%s: card has unknown MMCA version %d\n",
110 mmc_hostname(card->host), card->csd.mmca_vsn);
117 static void mmc_set_erase_size(struct mmc_card *card)
119 if (card->ext_csd.erase_group_def & 1)
120 card->erase_size = card->ext_csd.hc_erase_size;
122 card->erase_size = card->csd.erase_size;
124 mmc_init_erase(card);
128 * Given a 128-bit response, decode to our card CSD structure.
130 static int mmc_decode_csd(struct mmc_card *card)
132 struct mmc_csd *csd = &card->csd;
133 unsigned int e, m, a, b;
134 u32 *resp = card->raw_csd;
137 * We only understand CSD structure v1.1 and v1.2.
138 * v1.2 has extra information in bits 15, 11 and 10.
139 * We also support eMMC v4.4 & v4.41.
141 csd->structure = UNSTUFF_BITS(resp, 126, 2);
142 if (csd->structure == 0) {
143 pr_err("%s: unrecognised CSD structure version %d\n",
144 mmc_hostname(card->host), csd->structure);
148 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
149 m = UNSTUFF_BITS(resp, 115, 4);
150 e = UNSTUFF_BITS(resp, 112, 3);
151 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
152 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
154 m = UNSTUFF_BITS(resp, 99, 4);
155 e = UNSTUFF_BITS(resp, 96, 3);
156 csd->max_dtr = tran_exp[e] * tran_mant[m];
157 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
159 e = UNSTUFF_BITS(resp, 47, 3);
160 m = UNSTUFF_BITS(resp, 62, 12);
161 csd->capacity = (1 + m) << (e + 2);
163 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
164 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
165 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
166 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
167 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
168 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
169 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
170 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
172 if (csd->write_blkbits >= 9) {
173 a = UNSTUFF_BITS(resp, 42, 5);
174 b = UNSTUFF_BITS(resp, 37, 5);
175 csd->erase_size = (a + 1) * (b + 1);
176 csd->erase_size <<= csd->write_blkbits - 9;
182 static void mmc_select_card_type(struct mmc_card *card)
184 struct mmc_host *host = card->host;
185 u8 card_type = card->ext_csd.raw_card_type;
186 u32 caps = host->caps, caps2 = host->caps2;
187 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
188 unsigned int avail_type = 0;
190 if (caps & MMC_CAP_MMC_HIGHSPEED &&
191 card_type & EXT_CSD_CARD_TYPE_HS_26) {
192 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
193 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
196 if (caps & MMC_CAP_MMC_HIGHSPEED &&
197 card_type & EXT_CSD_CARD_TYPE_HS_52) {
198 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
199 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
202 if (caps & MMC_CAP_1_8V_DDR &&
203 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
204 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
205 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
208 if (caps & MMC_CAP_1_2V_DDR &&
209 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
210 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
211 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
214 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
215 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
216 hs200_max_dtr = MMC_HS200_MAX_DTR;
217 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
220 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
221 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
222 hs200_max_dtr = MMC_HS200_MAX_DTR;
223 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
226 if (caps2 & MMC_CAP2_HS400_1_8V &&
227 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
228 hs200_max_dtr = MMC_HS200_MAX_DTR;
229 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
232 if (caps2 & MMC_CAP2_HS400_1_2V &&
233 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
234 hs200_max_dtr = MMC_HS200_MAX_DTR;
235 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
238 card->ext_csd.hs_max_dtr = hs_max_dtr;
239 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
240 card->mmc_avail_type = avail_type;
243 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
245 u8 hc_erase_grp_sz, hc_wp_grp_sz;
248 * Disable these attributes by default
250 card->ext_csd.enhanced_area_offset = -EINVAL;
251 card->ext_csd.enhanced_area_size = -EINVAL;
254 * Enhanced area feature support -- check whether the eMMC
255 * card has the Enhanced area enabled. If so, export enhanced
256 * area offset and size to user by adding sysfs interface.
258 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
259 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
260 if (card->ext_csd.partition_setting_completed) {
262 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
264 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
267 * calculate the enhanced data area offset, in bytes
269 card->ext_csd.enhanced_area_offset =
270 (((unsigned long long)ext_csd[139]) << 24) +
271 (((unsigned long long)ext_csd[138]) << 16) +
272 (((unsigned long long)ext_csd[137]) << 8) +
273 (((unsigned long long)ext_csd[136]));
274 if (mmc_card_blockaddr(card))
275 card->ext_csd.enhanced_area_offset <<= 9;
277 * calculate the enhanced data area size, in kilobytes
279 card->ext_csd.enhanced_area_size =
280 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
282 card->ext_csd.enhanced_area_size *=
283 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
284 card->ext_csd.enhanced_area_size <<= 9;
286 pr_warn("%s: defines enhanced area without partition setting complete\n",
287 mmc_hostname(card->host));
292 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
295 u8 hc_erase_grp_sz, hc_wp_grp_sz;
296 unsigned int part_size;
299 * General purpose partition feature support --
300 * If ext_csd has the size of general purpose partitions,
301 * set size, part_cfg, partition name in mmc_part.
303 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
304 EXT_CSD_PART_SUPPORT_PART_EN) {
306 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
308 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
310 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
311 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
312 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
313 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
315 if (card->ext_csd.partition_setting_completed == 0) {
316 pr_warn("%s: has partition size defined without partition complete\n",
317 mmc_hostname(card->host));
321 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
323 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
325 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
326 part_size *= (size_t)(hc_erase_grp_sz *
328 mmc_part_add(card, part_size << 19,
329 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
331 MMC_BLK_DATA_AREA_GP);
337 * Decode extended CSD.
339 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
342 unsigned int part_size;
343 struct device_node *np;
344 bool broken_hpi = false;
346 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
347 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
348 if (card->csd.structure == 3) {
349 if (card->ext_csd.raw_ext_csd_structure > 2) {
350 pr_err("%s: unrecognised EXT_CSD structure "
351 "version %d\n", mmc_hostname(card->host),
352 card->ext_csd.raw_ext_csd_structure);
358 np = mmc_of_find_child_device(card->host, 0);
359 if (np && of_device_is_compatible(np, "mmc-card"))
360 broken_hpi = of_property_read_bool(np, "broken-hpi");
364 * The EXT_CSD format is meant to be forward compatible. As long
365 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
366 * are authorized, see JEDEC JESD84-B50 section B.8.
368 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
370 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
371 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
372 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
373 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
374 if (card->ext_csd.rev >= 2) {
375 card->ext_csd.sectors =
376 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
377 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
378 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
379 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
381 /* Cards with density > 2GiB are sector addressed */
382 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
383 mmc_card_set_blockaddr(card);
386 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
387 mmc_select_card_type(card);
389 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
390 card->ext_csd.raw_erase_timeout_mult =
391 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
392 card->ext_csd.raw_hc_erase_grp_size =
393 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
394 if (card->ext_csd.rev >= 3) {
395 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
396 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
398 /* EXT_CSD value is in units of 10ms, but we store in ms */
399 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
401 /* Sleep / awake timeout in 100ns units */
402 if (sa_shift > 0 && sa_shift <= 0x17)
403 card->ext_csd.sa_timeout =
404 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
405 card->ext_csd.erase_group_def =
406 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
407 card->ext_csd.hc_erase_timeout = 300 *
408 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
409 card->ext_csd.hc_erase_size =
410 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
412 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
415 * There are two boot regions of equal size, defined in
418 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
419 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
420 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
421 mmc_part_add(card, part_size,
422 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
424 MMC_BLK_DATA_AREA_BOOT);
429 card->ext_csd.raw_hc_erase_gap_size =
430 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
431 card->ext_csd.raw_sec_trim_mult =
432 ext_csd[EXT_CSD_SEC_TRIM_MULT];
433 card->ext_csd.raw_sec_erase_mult =
434 ext_csd[EXT_CSD_SEC_ERASE_MULT];
435 card->ext_csd.raw_sec_feature_support =
436 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
437 card->ext_csd.raw_trim_mult =
438 ext_csd[EXT_CSD_TRIM_MULT];
439 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
440 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
441 if (card->ext_csd.rev >= 4) {
442 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
443 EXT_CSD_PART_SETTING_COMPLETED)
444 card->ext_csd.partition_setting_completed = 1;
446 card->ext_csd.partition_setting_completed = 0;
448 mmc_manage_enhanced_area(card, ext_csd);
450 mmc_manage_gp_partitions(card, ext_csd);
452 card->ext_csd.sec_trim_mult =
453 ext_csd[EXT_CSD_SEC_TRIM_MULT];
454 card->ext_csd.sec_erase_mult =
455 ext_csd[EXT_CSD_SEC_ERASE_MULT];
456 card->ext_csd.sec_feature_support =
457 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
458 card->ext_csd.trim_timeout = 300 *
459 ext_csd[EXT_CSD_TRIM_MULT];
462 * Note that the call to mmc_part_add above defaults to read
463 * only. If this default assumption is changed, the call must
464 * take into account the value of boot_locked below.
466 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
467 card->ext_csd.boot_ro_lockable = true;
469 /* Save power class values */
470 card->ext_csd.raw_pwr_cl_52_195 =
471 ext_csd[EXT_CSD_PWR_CL_52_195];
472 card->ext_csd.raw_pwr_cl_26_195 =
473 ext_csd[EXT_CSD_PWR_CL_26_195];
474 card->ext_csd.raw_pwr_cl_52_360 =
475 ext_csd[EXT_CSD_PWR_CL_52_360];
476 card->ext_csd.raw_pwr_cl_26_360 =
477 ext_csd[EXT_CSD_PWR_CL_26_360];
478 card->ext_csd.raw_pwr_cl_200_195 =
479 ext_csd[EXT_CSD_PWR_CL_200_195];
480 card->ext_csd.raw_pwr_cl_200_360 =
481 ext_csd[EXT_CSD_PWR_CL_200_360];
482 card->ext_csd.raw_pwr_cl_ddr_52_195 =
483 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
484 card->ext_csd.raw_pwr_cl_ddr_52_360 =
485 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
486 card->ext_csd.raw_pwr_cl_ddr_200_360 =
487 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
490 if (card->ext_csd.rev >= 5) {
491 /* Adjust production date as per JEDEC JESD84-B451 */
492 if (card->cid.year < 2010)
493 card->cid.year += 16;
495 /* check whether the eMMC card supports BKOPS */
496 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
497 card->ext_csd.bkops = 1;
498 card->ext_csd.man_bkops_en =
499 (ext_csd[EXT_CSD_BKOPS_EN] &
500 EXT_CSD_MANUAL_BKOPS_MASK);
501 card->ext_csd.raw_bkops_status =
502 ext_csd[EXT_CSD_BKOPS_STATUS];
503 if (!card->ext_csd.man_bkops_en)
504 pr_info("%s: MAN_BKOPS_EN bit is not set\n",
505 mmc_hostname(card->host));
508 /* check whether the eMMC card supports HPI */
509 if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
510 card->ext_csd.hpi = 1;
511 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
512 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
514 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
516 * Indicate the maximum timeout to close
517 * a command interrupted by HPI
519 card->ext_csd.out_of_int_time =
520 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
523 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
524 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
527 * RPMB regions are defined in multiples of 128K.
529 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
530 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
531 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
532 EXT_CSD_PART_CONFIG_ACC_RPMB,
534 MMC_BLK_DATA_AREA_RPMB);
538 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
539 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
540 card->erased_byte = 0xFF;
542 card->erased_byte = 0x0;
544 /* eMMC v4.5 or later */
545 if (card->ext_csd.rev >= 6) {
546 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
548 card->ext_csd.generic_cmd6_time = 10 *
549 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
550 card->ext_csd.power_off_longtime = 10 *
551 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
553 card->ext_csd.cache_size =
554 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
555 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
556 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
557 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
559 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
560 card->ext_csd.data_sector_size = 4096;
562 card->ext_csd.data_sector_size = 512;
564 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
565 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
566 card->ext_csd.data_tag_unit_size =
567 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
568 (card->ext_csd.data_sector_size);
570 card->ext_csd.data_tag_unit_size = 0;
573 card->ext_csd.max_packed_writes =
574 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
575 card->ext_csd.max_packed_reads =
576 ext_csd[EXT_CSD_MAX_PACKED_READS];
578 card->ext_csd.data_sector_size = 512;
581 /* eMMC v5 or later */
582 if (card->ext_csd.rev >= 7) {
583 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
585 card->ext_csd.ffu_capable =
586 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
587 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
593 static int mmc_read_ext_csd(struct mmc_card *card)
598 if (!mmc_can_ext_csd(card))
601 err = mmc_get_ext_csd(card, &ext_csd);
603 /* If the host or the card can't do the switch,
604 * fail more gracefully. */
611 * High capacity cards should have this "magic" size
612 * stored in their CSD.
614 if (card->csd.capacity == (4096 * 512)) {
615 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
616 mmc_hostname(card->host));
618 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
619 mmc_hostname(card->host));
626 err = mmc_decode_ext_csd(card, ext_csd);
631 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
636 if (bus_width == MMC_BUS_WIDTH_1)
639 err = mmc_get_ext_csd(card, &bw_ext_csd);
643 /* only compare read only fields */
644 err = !((card->ext_csd.raw_partition_support ==
645 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
646 (card->ext_csd.raw_erased_mem_count ==
647 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
648 (card->ext_csd.rev ==
649 bw_ext_csd[EXT_CSD_REV]) &&
650 (card->ext_csd.raw_ext_csd_structure ==
651 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
652 (card->ext_csd.raw_card_type ==
653 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
654 (card->ext_csd.raw_s_a_timeout ==
655 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
656 (card->ext_csd.raw_hc_erase_gap_size ==
657 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
658 (card->ext_csd.raw_erase_timeout_mult ==
659 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
660 (card->ext_csd.raw_hc_erase_grp_size ==
661 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
662 (card->ext_csd.raw_sec_trim_mult ==
663 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
664 (card->ext_csd.raw_sec_erase_mult ==
665 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
666 (card->ext_csd.raw_sec_feature_support ==
667 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
668 (card->ext_csd.raw_trim_mult ==
669 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
670 (card->ext_csd.raw_sectors[0] ==
671 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
672 (card->ext_csd.raw_sectors[1] ==
673 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
674 (card->ext_csd.raw_sectors[2] ==
675 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
676 (card->ext_csd.raw_sectors[3] ==
677 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
678 (card->ext_csd.raw_pwr_cl_52_195 ==
679 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
680 (card->ext_csd.raw_pwr_cl_26_195 ==
681 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
682 (card->ext_csd.raw_pwr_cl_52_360 ==
683 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
684 (card->ext_csd.raw_pwr_cl_26_360 ==
685 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
686 (card->ext_csd.raw_pwr_cl_200_195 ==
687 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
688 (card->ext_csd.raw_pwr_cl_200_360 ==
689 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
690 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
691 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
692 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
693 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
694 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
695 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
704 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
705 card->raw_cid[2], card->raw_cid[3]);
706 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
707 card->raw_csd[2], card->raw_csd[3]);
708 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
709 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
710 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
711 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
712 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
713 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
714 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
715 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
716 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
717 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
718 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
719 card->ext_csd.enhanced_area_offset);
720 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
721 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
722 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
724 static ssize_t mmc_fwrev_show(struct device *dev,
725 struct device_attribute *attr,
728 struct mmc_card *card = mmc_dev_to_card(dev);
730 if (card->ext_csd.rev < 7) {
731 return sprintf(buf, "0x%x\n", card->cid.fwrev);
733 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
734 card->ext_csd.fwrev);
738 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
740 static struct attribute *mmc_std_attrs[] = {
744 &dev_attr_erase_size.attr,
745 &dev_attr_preferred_erase_size.attr,
746 &dev_attr_fwrev.attr,
747 &dev_attr_ffu_capable.attr,
748 &dev_attr_hwrev.attr,
749 &dev_attr_manfid.attr,
751 &dev_attr_oemid.attr,
753 &dev_attr_serial.attr,
754 &dev_attr_enhanced_area_offset.attr,
755 &dev_attr_enhanced_area_size.attr,
756 &dev_attr_raw_rpmb_size_mult.attr,
757 &dev_attr_rel_sectors.attr,
760 ATTRIBUTE_GROUPS(mmc_std);
762 static struct device_type mmc_type = {
763 .groups = mmc_std_groups,
767 * Select the PowerClass for the current bus width
768 * If power class is defined for 4/8 bit bus in the
769 * extended CSD register, select it by executing the
770 * mmc_switch command.
772 static int __mmc_select_powerclass(struct mmc_card *card,
773 unsigned int bus_width)
775 struct mmc_host *host = card->host;
776 struct mmc_ext_csd *ext_csd = &card->ext_csd;
777 unsigned int pwrclass_val = 0;
780 switch (1 << host->ios.vdd) {
781 case MMC_VDD_165_195:
782 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
783 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
784 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
785 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
786 ext_csd->raw_pwr_cl_52_195 :
787 ext_csd->raw_pwr_cl_ddr_52_195;
788 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
789 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
800 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
801 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
802 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
803 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
804 ext_csd->raw_pwr_cl_52_360 :
805 ext_csd->raw_pwr_cl_ddr_52_360;
806 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
807 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
808 ext_csd->raw_pwr_cl_ddr_200_360 :
809 ext_csd->raw_pwr_cl_200_360;
812 pr_warn("%s: Voltage range not supported for power class\n",
817 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
818 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
819 EXT_CSD_PWR_CL_8BIT_SHIFT;
821 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
822 EXT_CSD_PWR_CL_4BIT_SHIFT;
824 /* If the power class is different from the default value */
825 if (pwrclass_val > 0) {
826 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
829 card->ext_csd.generic_cmd6_time);
835 static int mmc_select_powerclass(struct mmc_card *card)
837 struct mmc_host *host = card->host;
838 u32 bus_width, ext_csd_bits;
841 /* Power class selection is supported for versions >= 4.0 */
842 if (!mmc_can_ext_csd(card))
845 bus_width = host->ios.bus_width;
846 /* Power class values are defined only for 4/8 bit bus */
847 if (bus_width == MMC_BUS_WIDTH_1)
850 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
852 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
853 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
855 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
856 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
858 err = __mmc_select_powerclass(card, ext_csd_bits);
860 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
861 mmc_hostname(host), 1 << bus_width, ddr);
867 * Set the bus speed for the selected speed mode.
869 static void mmc_set_bus_speed(struct mmc_card *card)
871 unsigned int max_dtr = (unsigned int)-1;
873 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
874 max_dtr > card->ext_csd.hs200_max_dtr)
875 max_dtr = card->ext_csd.hs200_max_dtr;
876 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
877 max_dtr = card->ext_csd.hs_max_dtr;
878 else if (max_dtr > card->csd.max_dtr)
879 max_dtr = card->csd.max_dtr;
881 mmc_set_clock(card->host, max_dtr);
885 * Select the bus width amoung 4-bit and 8-bit(SDR).
886 * If the bus width is changed successfully, return the selected width value.
887 * Zero is returned instead of error value if the wide width is not supported.
889 static int mmc_select_bus_width(struct mmc_card *card)
891 static unsigned ext_csd_bits[] = {
895 static unsigned bus_widths[] = {
899 struct mmc_host *host = card->host;
900 unsigned idx, bus_width = 0;
903 if (!mmc_can_ext_csd(card) ||
904 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
907 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
910 * Unlike SD, MMC cards dont have a configuration register to notify
911 * supported bus width. So bus test command should be run to identify
912 * the supported bus width or compare the ext csd values of current
913 * bus width and ext csd values of 1 bit mode read earlier.
915 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
917 * Host is capable of 8bit transfer, then switch
918 * the device to work in 8bit transfer mode. If the
919 * mmc switch command returns error then switch to
920 * 4bit transfer mode. On success set the corresponding
921 * bus width on the host.
923 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
926 card->ext_csd.generic_cmd6_time);
930 bus_width = bus_widths[idx];
931 mmc_set_bus_width(host, bus_width);
934 * If controller can't handle bus width test,
935 * compare ext_csd previously read in 1 bit mode
936 * against ext_csd at new bus width
938 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
939 err = mmc_compare_ext_csds(card, bus_width);
941 err = mmc_bus_test(card, bus_width);
947 pr_warn("%s: switch to bus width %d failed\n",
948 mmc_hostname(host), ext_csd_bits[idx]);
956 * Switch to the high-speed mode
958 static int mmc_select_hs(struct mmc_card *card)
962 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
963 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
964 card->ext_csd.generic_cmd6_time,
967 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
973 * Activate wide bus and DDR if supported.
975 static int mmc_select_hs_ddr(struct mmc_card *card)
977 struct mmc_host *host = card->host;
978 u32 bus_width, ext_csd_bits;
981 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
984 bus_width = host->ios.bus_width;
985 if (bus_width == MMC_BUS_WIDTH_1)
988 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
989 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
991 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
994 card->ext_csd.generic_cmd6_time);
996 pr_err("%s: switch to bus width %d ddr failed\n",
997 mmc_hostname(host), 1 << bus_width);
1002 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1005 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1007 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1008 * in the JEDEC spec for DDR.
1010 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1011 * host controller can support this, like some of the SDHCI
1012 * controller which connect to an eMMC device. Some of these
1013 * host controller still needs to use 1.8v vccq for supporting
1016 * So the sequence will be:
1017 * if (host and device can both support 1.2v IO)
1019 * else if (host and device can both support 1.8v IO)
1021 * so if host and device can only support 3.3v IO, this is the
1024 * WARNING: eMMC rules are NOT the same as SD DDR
1027 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1028 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1030 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1031 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1033 /* make sure vccq is 3.3v after switching disaster */
1035 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1038 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1043 static int mmc_select_hs400(struct mmc_card *card)
1045 struct mmc_host *host = card->host;
1050 * HS400 mode requires 8-bit bus width
1052 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1053 host->ios.bus_width == MMC_BUS_WIDTH_8))
1057 * Before switching to dual data rate operation for HS400,
1058 * it is required to convert from HS200 mode to HS mode.
1060 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1061 mmc_set_bus_speed(card);
1063 val = EXT_CSD_TIMING_HS |
1064 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1065 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1066 EXT_CSD_HS_TIMING, val,
1067 card->ext_csd.generic_cmd6_time,
1070 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1071 mmc_hostname(host), err);
1075 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1077 EXT_CSD_DDR_BUS_WIDTH_8,
1078 card->ext_csd.generic_cmd6_time);
1080 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1081 mmc_hostname(host), err);
1085 val = EXT_CSD_TIMING_HS400 |
1086 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1087 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1088 EXT_CSD_HS_TIMING, val,
1089 card->ext_csd.generic_cmd6_time,
1092 pr_err("%s: switch to hs400 failed, err:%d\n",
1093 mmc_hostname(host), err);
1097 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1098 mmc_set_bus_speed(card);
1103 int mmc_hs200_to_hs400(struct mmc_card *card)
1105 return mmc_select_hs400(card);
1108 /* Caller must hold re-tuning */
1109 static int mmc_switch_status(struct mmc_card *card)
1114 err = mmc_send_status(card, &status);
1118 return mmc_switch_status_error(card->host, status);
1121 int mmc_hs400_to_hs200(struct mmc_card *card)
1123 struct mmc_host *host = card->host;
1124 bool send_status = true;
1125 unsigned int max_dtr;
1129 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1130 send_status = false;
1132 /* Reduce frequency to HS */
1133 max_dtr = card->ext_csd.hs_max_dtr;
1134 mmc_set_clock(host, max_dtr);
1136 /* Switch HS400 to HS DDR */
1137 val = EXT_CSD_TIMING_HS |
1138 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1139 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1140 val, card->ext_csd.generic_cmd6_time,
1141 true, send_status, true);
1145 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1148 err = mmc_switch_status(card);
1153 /* Switch HS DDR to HS */
1154 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1155 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1156 true, send_status, true);
1160 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1163 err = mmc_switch_status(card);
1168 /* Switch HS to HS200 */
1169 val = EXT_CSD_TIMING_HS200 |
1170 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1171 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1172 val, card->ext_csd.generic_cmd6_time, true,
1177 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1180 err = mmc_switch_status(card);
1185 mmc_set_bus_speed(card);
1190 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1195 static void mmc_select_driver_type(struct mmc_card *card)
1197 int card_drv_type, drive_strength, drv_type;
1199 card_drv_type = card->ext_csd.raw_driver_strength |
1200 mmc_driver_type_mask(0);
1202 drive_strength = mmc_select_drive_strength(card,
1203 card->ext_csd.hs200_max_dtr,
1204 card_drv_type, &drv_type);
1206 card->drive_strength = drive_strength;
1209 mmc_set_driver_type(card->host, drv_type);
1213 * For device supporting HS200 mode, the following sequence
1214 * should be done before executing the tuning process.
1215 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1216 * 2. switch to HS200 mode
1217 * 3. set the clock to > 52Mhz and <=200MHz
1219 static int mmc_select_hs200(struct mmc_card *card)
1221 struct mmc_host *host = card->host;
1225 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1226 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1228 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1229 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1231 /* If fails try again during next card power cycle */
1235 mmc_select_driver_type(card);
1238 * Set the bus width(4 or 8) with host's support and
1239 * switch to HS200 mode if bus width is set successfully.
1241 err = mmc_select_bus_width(card);
1242 if (!IS_ERR_VALUE(err)) {
1243 val = EXT_CSD_TIMING_HS200 |
1244 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1245 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1246 EXT_CSD_HS_TIMING, val,
1247 card->ext_csd.generic_cmd6_time,
1250 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1257 * Activate High Speed or HS200 mode if supported.
1259 static int mmc_select_timing(struct mmc_card *card)
1263 if (!mmc_can_ext_csd(card))
1266 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1267 err = mmc_select_hs200(card);
1268 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1269 err = mmc_select_hs(card);
1271 if (err && err != -EBADMSG)
1275 pr_warn("%s: switch to %s failed\n",
1276 mmc_card_hs(card) ? "high-speed" :
1277 (mmc_card_hs200(card) ? "hs200" : ""),
1278 mmc_hostname(card->host));
1284 * Set the bus speed to the selected bus timing.
1285 * If timing is not selected, backward compatible is the default.
1287 mmc_set_bus_speed(card);
1292 * Execute tuning sequence to seek the proper bus operating
1293 * conditions for HS200 and HS400, which sends CMD21 to the device.
1295 static int mmc_hs200_tuning(struct mmc_card *card)
1297 struct mmc_host *host = card->host;
1300 * Timing should be adjusted to the HS400 target
1301 * operation frequency for tuning process
1303 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1304 host->ios.bus_width == MMC_BUS_WIDTH_8)
1305 if (host->ops->prepare_hs400_tuning)
1306 host->ops->prepare_hs400_tuning(host, &host->ios);
1308 return mmc_execute_tuning(card);
1312 * Handle the detection and initialisation of a card.
1314 * In the case of a resume, "oldcard" will contain the card
1315 * we're trying to reinitialise.
1317 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1318 struct mmc_card *oldcard)
1320 struct mmc_card *card;
1326 WARN_ON(!host->claimed);
1328 /* Set correct bus mode for MMC before attempting init */
1329 if (!mmc_host_is_spi(host))
1330 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1333 * Since we're changing the OCR value, we seem to
1334 * need to tell some cards to go back to the idle
1335 * state. We wait 1ms to give cards time to
1337 * mmc_go_idle is needed for eMMC that are asleep
1341 /* The extra bit indicates that we support high capacity */
1342 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1347 * For SPI, enable CRC as appropriate.
1349 if (mmc_host_is_spi(host)) {
1350 err = mmc_spi_set_crc(host, use_spi_crc);
1356 * Fetch CID from card.
1358 if (mmc_host_is_spi(host))
1359 err = mmc_send_cid(host, cid);
1361 err = mmc_all_send_cid(host, cid);
1366 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1374 * Allocate card structure.
1376 card = mmc_alloc_card(host, &mmc_type);
1378 err = PTR_ERR(card);
1383 card->type = MMC_TYPE_MMC;
1385 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1389 * Call the optional HC's init_card function to handle quirks.
1391 if (host->ops->init_card)
1392 host->ops->init_card(host, card);
1395 * For native busses: set card RCA and quit open drain mode.
1397 if (!mmc_host_is_spi(host)) {
1398 err = mmc_set_relative_addr(card);
1402 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1407 * Fetch CSD from card.
1409 err = mmc_send_csd(card, card->raw_csd);
1413 err = mmc_decode_csd(card);
1416 err = mmc_decode_cid(card);
1422 * handling only for cards supporting DSR and hosts requesting
1425 if (card->csd.dsr_imp && host->dsr_req)
1429 * Select card, as all following commands rely on that.
1431 if (!mmc_host_is_spi(host)) {
1432 err = mmc_select_card(card);
1438 /* Read extended CSD. */
1439 err = mmc_read_ext_csd(card);
1443 /* If doing byte addressing, check if required to do sector
1444 * addressing. Handle the case of <2GB cards needing sector
1445 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1446 * ocr register has bit 30 set for sector addressing.
1448 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1449 mmc_card_set_blockaddr(card);
1451 /* Erase size depends on CSD and Extended CSD */
1452 mmc_set_erase_size(card);
1456 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1457 * bit. This bit will be lost every time after a reset or power off.
1459 if (card->ext_csd.partition_setting_completed ||
1460 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1461 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1462 EXT_CSD_ERASE_GROUP_DEF, 1,
1463 card->ext_csd.generic_cmd6_time);
1465 if (err && err != -EBADMSG)
1471 * Just disable enhanced area off & sz
1472 * will try to enable ERASE_GROUP_DEF
1473 * during next time reinit
1475 card->ext_csd.enhanced_area_offset = -EINVAL;
1476 card->ext_csd.enhanced_area_size = -EINVAL;
1478 card->ext_csd.erase_group_def = 1;
1480 * enable ERASE_GRP_DEF successfully.
1481 * This will affect the erase size, so
1482 * here need to reset erase size
1484 mmc_set_erase_size(card);
1489 * Ensure eMMC user default partition is enabled
1491 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1492 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1493 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1494 card->ext_csd.part_config,
1495 card->ext_csd.part_time);
1496 if (err && err != -EBADMSG)
1501 * Enable power_off_notification byte in the ext_csd register
1503 if (card->ext_csd.rev >= 6) {
1504 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1505 EXT_CSD_POWER_OFF_NOTIFICATION,
1507 card->ext_csd.generic_cmd6_time);
1508 if (err && err != -EBADMSG)
1512 * The err can be -EBADMSG or 0,
1513 * so check for success and update the flag
1516 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1520 * Select timing interface
1522 err = mmc_select_timing(card);
1526 if (mmc_card_hs200(card)) {
1527 err = mmc_hs200_tuning(card);
1531 err = mmc_select_hs400(card);
1534 } else if (mmc_card_hs(card)) {
1535 /* Select the desired bus width optionally */
1536 err = mmc_select_bus_width(card);
1537 if (!IS_ERR_VALUE(err)) {
1538 err = mmc_select_hs_ddr(card);
1545 * Choose the power class with selected bus interface
1547 mmc_select_powerclass(card);
1550 * Enable HPI feature (if supported)
1552 if (card->ext_csd.hpi) {
1553 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1554 EXT_CSD_HPI_MGMT, 1,
1555 card->ext_csd.generic_cmd6_time);
1556 if (err && err != -EBADMSG)
1559 pr_warn("%s: Enabling HPI failed\n",
1560 mmc_hostname(card->host));
1563 card->ext_csd.hpi_en = 1;
1567 * If cache size is higher than 0, this indicates
1568 * the existence of cache and it can be turned on.
1570 if (card->ext_csd.cache_size > 0) {
1571 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1572 EXT_CSD_CACHE_CTRL, 1,
1573 card->ext_csd.generic_cmd6_time);
1574 if (err && err != -EBADMSG)
1578 * Only if no error, cache is turned on successfully.
1581 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1582 mmc_hostname(card->host), err);
1583 card->ext_csd.cache_ctrl = 0;
1586 card->ext_csd.cache_ctrl = 1;
1591 * The mandatory minimum values are defined for packed command.
1594 if (card->ext_csd.max_packed_writes >= 3 &&
1595 card->ext_csd.max_packed_reads >= 5 &&
1596 host->caps2 & MMC_CAP2_PACKED_CMD) {
1597 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1598 EXT_CSD_EXP_EVENTS_CTRL,
1599 EXT_CSD_PACKED_EVENT_EN,
1600 card->ext_csd.generic_cmd6_time);
1601 if (err && err != -EBADMSG)
1604 pr_warn("%s: Enabling packed event failed\n",
1605 mmc_hostname(card->host));
1606 card->ext_csd.packed_event_en = 0;
1609 card->ext_csd.packed_event_en = 1;
1620 mmc_remove_card(card);
1625 static int mmc_can_sleep(struct mmc_card *card)
1627 return (card && card->ext_csd.rev >= 3);
1630 static int mmc_sleep(struct mmc_host *host)
1632 struct mmc_command cmd = {0};
1633 struct mmc_card *card = host->card;
1634 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1637 /* Re-tuning can't be done once the card is deselected */
1638 mmc_retune_hold(host);
1640 err = mmc_deselect_cards(host);
1644 cmd.opcode = MMC_SLEEP_AWAKE;
1645 cmd.arg = card->rca << 16;
1649 * If the max_busy_timeout of the host is specified, validate it against
1650 * the sleep cmd timeout. A failure means we need to prevent the host
1651 * from doing hw busy detection, which is done by converting to a R1
1652 * response instead of a R1B.
1654 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1655 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1657 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1658 cmd.busy_timeout = timeout_ms;
1661 err = mmc_wait_for_cmd(host, &cmd, 0);
1666 * If the host does not wait while the card signals busy, then we will
1667 * will have to wait the sleep/awake timeout. Note, we cannot use the
1668 * SEND_STATUS command to poll the status because that command (and most
1669 * others) is invalid while the card sleeps.
1671 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1672 mmc_delay(timeout_ms);
1675 mmc_retune_release(host);
1679 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1682 mmc_card_mmc(card) &&
1683 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1686 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1688 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1691 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1692 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1693 timeout = card->ext_csd.power_off_longtime;
1695 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1696 EXT_CSD_POWER_OFF_NOTIFICATION,
1697 notify_type, timeout, true, false, false);
1699 pr_err("%s: Power Off Notification timed out, %u\n",
1700 mmc_hostname(card->host), timeout);
1702 /* Disable the power off notification after the switch operation. */
1703 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1709 * Host is being removed. Free up the current card.
1711 static void mmc_remove(struct mmc_host *host)
1714 BUG_ON(!host->card);
1716 mmc_remove_card(host->card);
1721 * Card detection - card is alive.
1723 static int mmc_alive(struct mmc_host *host)
1725 return mmc_send_status(host->card, NULL);
1729 * Card detection callback from host.
1731 static void mmc_detect(struct mmc_host *host)
1736 BUG_ON(!host->card);
1738 mmc_get_card(host->card);
1741 * Just check if our card has been removed.
1743 err = _mmc_detect_card_removed(host);
1745 mmc_put_card(host->card);
1750 mmc_claim_host(host);
1751 mmc_detach_bus(host);
1752 mmc_power_off(host);
1753 mmc_release_host(host);
1757 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1760 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1761 EXT_CSD_POWER_OFF_LONG;
1764 BUG_ON(!host->card);
1766 mmc_claim_host(host);
1768 if (mmc_card_suspended(host->card))
1771 if (mmc_card_doing_bkops(host->card)) {
1772 err = mmc_stop_bkops(host->card);
1777 err = mmc_flush_cache(host->card);
1781 if (mmc_can_poweroff_notify(host->card) &&
1782 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1783 err = mmc_poweroff_notify(host->card, notify_type);
1784 else if (mmc_can_sleep(host->card))
1785 err = mmc_sleep(host);
1786 else if (!mmc_host_is_spi(host))
1787 err = mmc_deselect_cards(host);
1790 mmc_power_off(host);
1791 mmc_card_set_suspended(host->card);
1794 mmc_release_host(host);
1801 static int mmc_suspend(struct mmc_host *host)
1805 err = _mmc_suspend(host, true);
1807 pm_runtime_disable(&host->card->dev);
1808 pm_runtime_set_suspended(&host->card->dev);
1815 * This function tries to determine if the same card is still present
1816 * and, if so, restore all state to it.
1818 static int _mmc_resume(struct mmc_host *host)
1823 BUG_ON(!host->card);
1825 mmc_claim_host(host);
1827 if (!mmc_card_suspended(host->card))
1830 mmc_power_up(host, host->card->ocr);
1831 err = mmc_init_card(host, host->card->ocr, host->card);
1832 mmc_card_clr_suspended(host->card);
1835 mmc_release_host(host);
1842 static int mmc_shutdown(struct mmc_host *host)
1847 * In a specific case for poweroff notify, we need to resume the card
1848 * before we can shutdown it properly.
1850 if (mmc_can_poweroff_notify(host->card) &&
1851 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1852 err = _mmc_resume(host);
1855 err = _mmc_suspend(host, false);
1861 * Callback for resume.
1863 static int mmc_resume(struct mmc_host *host)
1867 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1868 err = _mmc_resume(host);
1869 pm_runtime_set_active(&host->card->dev);
1870 pm_runtime_mark_last_busy(&host->card->dev);
1872 pm_runtime_enable(&host->card->dev);
1878 * Callback for runtime_suspend.
1880 static int mmc_runtime_suspend(struct mmc_host *host)
1884 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1887 err = _mmc_suspend(host, true);
1889 pr_err("%s: error %d doing aggressive suspend\n",
1890 mmc_hostname(host), err);
1896 * Callback for runtime_resume.
1898 static int mmc_runtime_resume(struct mmc_host *host)
1902 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1905 err = _mmc_resume(host);
1907 pr_err("%s: error %d doing aggressive resume\n",
1908 mmc_hostname(host), err);
1913 int mmc_can_reset(struct mmc_card *card)
1917 rst_n_function = card->ext_csd.rst_n_function;
1918 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
1922 EXPORT_SYMBOL(mmc_can_reset);
1924 static int mmc_reset(struct mmc_host *host)
1926 struct mmc_card *card = host->card;
1929 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
1932 if (!mmc_can_reset(card))
1935 mmc_host_clk_hold(host);
1936 mmc_set_clock(host, host->f_init);
1938 host->ops->hw_reset(host);
1940 /* If the reset has happened, then a status command will fail */
1941 if (!mmc_send_status(card, &status)) {
1942 mmc_host_clk_release(host);
1946 /* Set initial state and call mmc_set_ios */
1947 mmc_set_initial_state(host);
1948 mmc_host_clk_release(host);
1950 return mmc_init_card(host, card->ocr, card);
1953 static const struct mmc_bus_ops mmc_ops = {
1954 .remove = mmc_remove,
1955 .detect = mmc_detect,
1956 .suspend = mmc_suspend,
1957 .resume = mmc_resume,
1958 .runtime_suspend = mmc_runtime_suspend,
1959 .runtime_resume = mmc_runtime_resume,
1961 .shutdown = mmc_shutdown,
1966 * Starting point for MMC card init.
1968 int mmc_attach_mmc(struct mmc_host *host)
1974 WARN_ON(!host->claimed);
1976 /* Set correct bus mode for MMC before attempting attach */
1977 if (!mmc_host_is_spi(host))
1978 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1980 err = mmc_send_op_cond(host, 0, &ocr);
1984 mmc_attach_bus(host, &mmc_ops);
1985 if (host->ocr_avail_mmc)
1986 host->ocr_avail = host->ocr_avail_mmc;
1989 * We need to get OCR a different way for SPI.
1991 if (mmc_host_is_spi(host)) {
1992 err = mmc_spi_read_ocr(host, 1, &ocr);
1997 rocr = mmc_select_voltage(host, ocr);
2000 * Can we support the voltage of the card?
2008 * Detect and init the card.
2010 err = mmc_init_card(host, rocr, NULL);
2014 mmc_release_host(host);
2015 err = mmc_add_card(host->card);
2016 mmc_claim_host(host);
2023 mmc_release_host(host);
2024 mmc_remove_card(host->card);
2025 mmc_claim_host(host);
2028 mmc_detach_bus(host);
2030 pr_err("%s: error %d whilst initialising MMC card\n",
2031 mmc_hostname(host), err);