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);
336 /* Minimum partition switch timeout in milliseconds */
337 #define MMC_MIN_PART_SWITCH_TIME 300
340 * Decode extended CSD.
342 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
345 unsigned int part_size;
346 struct device_node *np;
347 bool broken_hpi = false;
349 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
350 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
351 if (card->csd.structure == 3) {
352 if (card->ext_csd.raw_ext_csd_structure > 2) {
353 pr_err("%s: unrecognised EXT_CSD structure "
354 "version %d\n", mmc_hostname(card->host),
355 card->ext_csd.raw_ext_csd_structure);
361 np = mmc_of_find_child_device(card->host, 0);
362 if (np && of_device_is_compatible(np, "mmc-card"))
363 broken_hpi = of_property_read_bool(np, "broken-hpi");
367 * The EXT_CSD format is meant to be forward compatible. As long
368 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
369 * are authorized, see JEDEC JESD84-B50 section B.8.
371 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
373 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
374 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
375 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
376 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
377 if (card->ext_csd.rev >= 2) {
378 card->ext_csd.sectors =
379 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
380 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
381 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
382 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
384 /* Cards with density > 2GiB are sector addressed */
385 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
386 mmc_card_set_blockaddr(card);
389 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
390 mmc_select_card_type(card);
392 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
393 card->ext_csd.raw_erase_timeout_mult =
394 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
395 card->ext_csd.raw_hc_erase_grp_size =
396 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
397 if (card->ext_csd.rev >= 3) {
398 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
399 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
401 /* EXT_CSD value is in units of 10ms, but we store in ms */
402 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
404 /* Sleep / awake timeout in 100ns units */
405 if (sa_shift > 0 && sa_shift <= 0x17)
406 card->ext_csd.sa_timeout =
407 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
408 card->ext_csd.erase_group_def =
409 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
410 card->ext_csd.hc_erase_timeout = 300 *
411 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
412 card->ext_csd.hc_erase_size =
413 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
415 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
418 * There are two boot regions of equal size, defined in
421 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
422 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
423 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
424 mmc_part_add(card, part_size,
425 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
427 MMC_BLK_DATA_AREA_BOOT);
432 card->ext_csd.raw_hc_erase_gap_size =
433 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
434 card->ext_csd.raw_sec_trim_mult =
435 ext_csd[EXT_CSD_SEC_TRIM_MULT];
436 card->ext_csd.raw_sec_erase_mult =
437 ext_csd[EXT_CSD_SEC_ERASE_MULT];
438 card->ext_csd.raw_sec_feature_support =
439 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
440 card->ext_csd.raw_trim_mult =
441 ext_csd[EXT_CSD_TRIM_MULT];
442 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
443 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
444 if (card->ext_csd.rev >= 4) {
445 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
446 EXT_CSD_PART_SETTING_COMPLETED)
447 card->ext_csd.partition_setting_completed = 1;
449 card->ext_csd.partition_setting_completed = 0;
451 mmc_manage_enhanced_area(card, ext_csd);
453 mmc_manage_gp_partitions(card, ext_csd);
455 card->ext_csd.sec_trim_mult =
456 ext_csd[EXT_CSD_SEC_TRIM_MULT];
457 card->ext_csd.sec_erase_mult =
458 ext_csd[EXT_CSD_SEC_ERASE_MULT];
459 card->ext_csd.sec_feature_support =
460 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
461 card->ext_csd.trim_timeout = 300 *
462 ext_csd[EXT_CSD_TRIM_MULT];
465 * Note that the call to mmc_part_add above defaults to read
466 * only. If this default assumption is changed, the call must
467 * take into account the value of boot_locked below.
469 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
470 card->ext_csd.boot_ro_lockable = true;
472 /* Save power class values */
473 card->ext_csd.raw_pwr_cl_52_195 =
474 ext_csd[EXT_CSD_PWR_CL_52_195];
475 card->ext_csd.raw_pwr_cl_26_195 =
476 ext_csd[EXT_CSD_PWR_CL_26_195];
477 card->ext_csd.raw_pwr_cl_52_360 =
478 ext_csd[EXT_CSD_PWR_CL_52_360];
479 card->ext_csd.raw_pwr_cl_26_360 =
480 ext_csd[EXT_CSD_PWR_CL_26_360];
481 card->ext_csd.raw_pwr_cl_200_195 =
482 ext_csd[EXT_CSD_PWR_CL_200_195];
483 card->ext_csd.raw_pwr_cl_200_360 =
484 ext_csd[EXT_CSD_PWR_CL_200_360];
485 card->ext_csd.raw_pwr_cl_ddr_52_195 =
486 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
487 card->ext_csd.raw_pwr_cl_ddr_52_360 =
488 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
489 card->ext_csd.raw_pwr_cl_ddr_200_360 =
490 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
493 if (card->ext_csd.rev >= 5) {
494 /* Adjust production date as per JEDEC JESD84-B451 */
495 if (card->cid.year < 2010)
496 card->cid.year += 16;
498 /* check whether the eMMC card supports BKOPS */
499 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
500 card->ext_csd.bkops = 1;
501 card->ext_csd.man_bkops_en =
502 (ext_csd[EXT_CSD_BKOPS_EN] &
503 EXT_CSD_MANUAL_BKOPS_MASK);
504 card->ext_csd.raw_bkops_status =
505 ext_csd[EXT_CSD_BKOPS_STATUS];
506 if (!card->ext_csd.man_bkops_en)
507 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
508 mmc_hostname(card->host));
511 /* check whether the eMMC card supports HPI */
512 if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
513 card->ext_csd.hpi = 1;
514 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
515 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
517 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
519 * Indicate the maximum timeout to close
520 * a command interrupted by HPI
522 card->ext_csd.out_of_int_time =
523 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
526 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
527 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
530 * RPMB regions are defined in multiples of 128K.
532 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
533 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
534 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
535 EXT_CSD_PART_CONFIG_ACC_RPMB,
537 MMC_BLK_DATA_AREA_RPMB);
541 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
542 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
543 card->erased_byte = 0xFF;
545 card->erased_byte = 0x0;
547 /* eMMC v4.5 or later */
548 if (card->ext_csd.rev >= 6) {
549 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
551 card->ext_csd.generic_cmd6_time = 10 *
552 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
553 card->ext_csd.power_off_longtime = 10 *
554 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
556 card->ext_csd.cache_size =
557 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
558 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
559 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
560 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
562 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
563 card->ext_csd.data_sector_size = 4096;
565 card->ext_csd.data_sector_size = 512;
567 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
568 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
569 card->ext_csd.data_tag_unit_size =
570 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
571 (card->ext_csd.data_sector_size);
573 card->ext_csd.data_tag_unit_size = 0;
576 card->ext_csd.max_packed_writes =
577 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
578 card->ext_csd.max_packed_reads =
579 ext_csd[EXT_CSD_MAX_PACKED_READS];
581 card->ext_csd.data_sector_size = 512;
585 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
586 * when accessing a specific field", so use it here if there is no
587 * PARTITION_SWITCH_TIME.
589 if (!card->ext_csd.part_time)
590 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
591 /* Some eMMC set the value too low so set a minimum */
592 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
593 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
595 /* eMMC v5 or later */
596 if (card->ext_csd.rev >= 7) {
597 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
599 card->ext_csd.ffu_capable =
600 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
601 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
607 static int mmc_read_ext_csd(struct mmc_card *card)
612 if (!mmc_can_ext_csd(card))
615 err = mmc_get_ext_csd(card, &ext_csd);
617 /* If the host or the card can't do the switch,
618 * fail more gracefully. */
625 * High capacity cards should have this "magic" size
626 * stored in their CSD.
628 if (card->csd.capacity == (4096 * 512)) {
629 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
630 mmc_hostname(card->host));
632 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
633 mmc_hostname(card->host));
640 err = mmc_decode_ext_csd(card, ext_csd);
645 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
650 if (bus_width == MMC_BUS_WIDTH_1)
653 err = mmc_get_ext_csd(card, &bw_ext_csd);
657 /* only compare read only fields */
658 err = !((card->ext_csd.raw_partition_support ==
659 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
660 (card->ext_csd.raw_erased_mem_count ==
661 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
662 (card->ext_csd.rev ==
663 bw_ext_csd[EXT_CSD_REV]) &&
664 (card->ext_csd.raw_ext_csd_structure ==
665 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
666 (card->ext_csd.raw_card_type ==
667 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
668 (card->ext_csd.raw_s_a_timeout ==
669 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
670 (card->ext_csd.raw_hc_erase_gap_size ==
671 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
672 (card->ext_csd.raw_erase_timeout_mult ==
673 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
674 (card->ext_csd.raw_hc_erase_grp_size ==
675 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
676 (card->ext_csd.raw_sec_trim_mult ==
677 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
678 (card->ext_csd.raw_sec_erase_mult ==
679 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
680 (card->ext_csd.raw_sec_feature_support ==
681 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
682 (card->ext_csd.raw_trim_mult ==
683 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
684 (card->ext_csd.raw_sectors[0] ==
685 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
686 (card->ext_csd.raw_sectors[1] ==
687 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
688 (card->ext_csd.raw_sectors[2] ==
689 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
690 (card->ext_csd.raw_sectors[3] ==
691 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
692 (card->ext_csd.raw_pwr_cl_52_195 ==
693 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
694 (card->ext_csd.raw_pwr_cl_26_195 ==
695 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
696 (card->ext_csd.raw_pwr_cl_52_360 ==
697 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
698 (card->ext_csd.raw_pwr_cl_26_360 ==
699 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
700 (card->ext_csd.raw_pwr_cl_200_195 ==
701 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
702 (card->ext_csd.raw_pwr_cl_200_360 ==
703 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
704 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
705 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
706 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
707 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
708 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
709 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
718 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
719 card->raw_cid[2], card->raw_cid[3]);
720 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
721 card->raw_csd[2], card->raw_csd[3]);
722 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
723 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
724 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
725 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
726 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
727 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
728 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
729 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
730 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
731 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
732 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
733 card->ext_csd.enhanced_area_offset);
734 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
735 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
736 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
738 static ssize_t mmc_fwrev_show(struct device *dev,
739 struct device_attribute *attr,
742 struct mmc_card *card = mmc_dev_to_card(dev);
744 if (card->ext_csd.rev < 7) {
745 return sprintf(buf, "0x%x\n", card->cid.fwrev);
747 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
748 card->ext_csd.fwrev);
752 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
754 static struct attribute *mmc_std_attrs[] = {
758 &dev_attr_erase_size.attr,
759 &dev_attr_preferred_erase_size.attr,
760 &dev_attr_fwrev.attr,
761 &dev_attr_ffu_capable.attr,
762 &dev_attr_hwrev.attr,
763 &dev_attr_manfid.attr,
765 &dev_attr_oemid.attr,
767 &dev_attr_serial.attr,
768 &dev_attr_enhanced_area_offset.attr,
769 &dev_attr_enhanced_area_size.attr,
770 &dev_attr_raw_rpmb_size_mult.attr,
771 &dev_attr_rel_sectors.attr,
774 ATTRIBUTE_GROUPS(mmc_std);
776 static struct device_type mmc_type = {
777 .groups = mmc_std_groups,
781 * Select the PowerClass for the current bus width
782 * If power class is defined for 4/8 bit bus in the
783 * extended CSD register, select it by executing the
784 * mmc_switch command.
786 static int __mmc_select_powerclass(struct mmc_card *card,
787 unsigned int bus_width)
789 struct mmc_host *host = card->host;
790 struct mmc_ext_csd *ext_csd = &card->ext_csd;
791 unsigned int pwrclass_val = 0;
794 switch (1 << host->ios.vdd) {
795 case MMC_VDD_165_195:
796 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
797 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
798 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
799 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
800 ext_csd->raw_pwr_cl_52_195 :
801 ext_csd->raw_pwr_cl_ddr_52_195;
802 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
803 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
814 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
815 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
816 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
817 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
818 ext_csd->raw_pwr_cl_52_360 :
819 ext_csd->raw_pwr_cl_ddr_52_360;
820 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
821 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
822 ext_csd->raw_pwr_cl_ddr_200_360 :
823 ext_csd->raw_pwr_cl_200_360;
826 pr_warn("%s: Voltage range not supported for power class\n",
831 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
832 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
833 EXT_CSD_PWR_CL_8BIT_SHIFT;
835 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
836 EXT_CSD_PWR_CL_4BIT_SHIFT;
838 /* If the power class is different from the default value */
839 if (pwrclass_val > 0) {
840 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
843 card->ext_csd.generic_cmd6_time);
849 static int mmc_select_powerclass(struct mmc_card *card)
851 struct mmc_host *host = card->host;
852 u32 bus_width, ext_csd_bits;
855 /* Power class selection is supported for versions >= 4.0 */
856 if (!mmc_can_ext_csd(card))
859 bus_width = host->ios.bus_width;
860 /* Power class values are defined only for 4/8 bit bus */
861 if (bus_width == MMC_BUS_WIDTH_1)
864 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
866 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
867 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
869 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
870 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
872 err = __mmc_select_powerclass(card, ext_csd_bits);
874 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
875 mmc_hostname(host), 1 << bus_width, ddr);
881 * Set the bus speed for the selected speed mode.
883 static void mmc_set_bus_speed(struct mmc_card *card)
885 unsigned int max_dtr = (unsigned int)-1;
887 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
888 max_dtr > card->ext_csd.hs200_max_dtr)
889 max_dtr = card->ext_csd.hs200_max_dtr;
890 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
891 max_dtr = card->ext_csd.hs_max_dtr;
892 else if (max_dtr > card->csd.max_dtr)
893 max_dtr = card->csd.max_dtr;
895 mmc_set_clock(card->host, max_dtr);
899 * Select the bus width amoung 4-bit and 8-bit(SDR).
900 * If the bus width is changed successfully, return the selected width value.
901 * Zero is returned instead of error value if the wide width is not supported.
903 static int mmc_select_bus_width(struct mmc_card *card)
905 static unsigned ext_csd_bits[] = {
909 static unsigned bus_widths[] = {
913 struct mmc_host *host = card->host;
914 unsigned idx, bus_width = 0;
917 if (!mmc_can_ext_csd(card) ||
918 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
921 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
924 * Unlike SD, MMC cards dont have a configuration register to notify
925 * supported bus width. So bus test command should be run to identify
926 * the supported bus width or compare the ext csd values of current
927 * bus width and ext csd values of 1 bit mode read earlier.
929 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
931 * Host is capable of 8bit transfer, then switch
932 * the device to work in 8bit transfer mode. If the
933 * mmc switch command returns error then switch to
934 * 4bit transfer mode. On success set the corresponding
935 * bus width on the host.
937 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
940 card->ext_csd.generic_cmd6_time);
944 bus_width = bus_widths[idx];
945 mmc_set_bus_width(host, bus_width);
948 * If controller can't handle bus width test,
949 * compare ext_csd previously read in 1 bit mode
950 * against ext_csd at new bus width
952 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
953 err = mmc_compare_ext_csds(card, bus_width);
955 err = mmc_bus_test(card, bus_width);
961 pr_warn("%s: switch to bus width %d failed\n",
962 mmc_hostname(host), 1 << bus_width);
970 * Switch to the high-speed mode
972 static int mmc_select_hs(struct mmc_card *card)
976 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
977 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
978 card->ext_csd.generic_cmd6_time,
981 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
987 * Activate wide bus and DDR if supported.
989 static int mmc_select_hs_ddr(struct mmc_card *card)
991 struct mmc_host *host = card->host;
992 u32 bus_width, ext_csd_bits;
995 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
998 bus_width = host->ios.bus_width;
999 if (bus_width == MMC_BUS_WIDTH_1)
1002 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1003 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1005 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1008 card->ext_csd.generic_cmd6_time);
1010 pr_err("%s: switch to bus width %d ddr failed\n",
1011 mmc_hostname(host), 1 << bus_width);
1016 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1019 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1021 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1022 * in the JEDEC spec for DDR.
1024 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1025 * host controller can support this, like some of the SDHCI
1026 * controller which connect to an eMMC device. Some of these
1027 * host controller still needs to use 1.8v vccq for supporting
1030 * So the sequence will be:
1031 * if (host and device can both support 1.2v IO)
1033 * else if (host and device can both support 1.8v IO)
1035 * so if host and device can only support 3.3v IO, this is the
1038 * WARNING: eMMC rules are NOT the same as SD DDR
1041 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1042 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1044 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1045 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1047 /* make sure vccq is 3.3v after switching disaster */
1049 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1052 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1057 /* Caller must hold re-tuning */
1058 static int mmc_switch_status(struct mmc_card *card)
1063 err = mmc_send_status(card, &status);
1067 return mmc_switch_status_error(card->host, status);
1070 static int mmc_select_hs400(struct mmc_card *card)
1072 struct mmc_host *host = card->host;
1073 bool send_status = true;
1074 unsigned int max_dtr;
1079 * HS400 mode requires 8-bit bus width
1081 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1082 host->ios.bus_width == MMC_BUS_WIDTH_8))
1085 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1086 send_status = false;
1088 /* Reduce frequency to HS frequency */
1089 max_dtr = card->ext_csd.hs_max_dtr;
1090 mmc_set_clock(host, max_dtr);
1092 /* Switch card to HS mode */
1093 val = EXT_CSD_TIMING_HS;
1094 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1095 EXT_CSD_HS_TIMING, val,
1096 card->ext_csd.generic_cmd6_time,
1097 true, send_status, true);
1099 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1100 mmc_hostname(host), err);
1104 /* Set host controller to HS timing */
1105 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1108 err = mmc_switch_status(card);
1113 /* Switch card to DDR */
1114 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1116 EXT_CSD_DDR_BUS_WIDTH_8,
1117 card->ext_csd.generic_cmd6_time);
1119 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1120 mmc_hostname(host), err);
1124 /* Switch card to HS400 */
1125 val = EXT_CSD_TIMING_HS400 |
1126 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1127 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1128 EXT_CSD_HS_TIMING, val,
1129 card->ext_csd.generic_cmd6_time,
1130 true, send_status, true);
1132 pr_err("%s: switch to hs400 failed, err:%d\n",
1133 mmc_hostname(host), err);
1137 /* Set host controller to HS400 timing and frequency */
1138 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1139 mmc_set_bus_speed(card);
1142 err = mmc_switch_status(card);
1150 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1155 int mmc_hs200_to_hs400(struct mmc_card *card)
1157 return mmc_select_hs400(card);
1160 int mmc_hs400_to_hs200(struct mmc_card *card)
1162 struct mmc_host *host = card->host;
1163 bool send_status = true;
1164 unsigned int max_dtr;
1168 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1169 send_status = false;
1171 /* Reduce frequency to HS */
1172 max_dtr = card->ext_csd.hs_max_dtr;
1173 mmc_set_clock(host, max_dtr);
1175 /* Switch HS400 to HS DDR */
1176 val = EXT_CSD_TIMING_HS;
1177 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1178 val, card->ext_csd.generic_cmd6_time,
1179 true, send_status, true);
1183 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1186 err = mmc_switch_status(card);
1191 /* Switch HS DDR to HS */
1192 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1193 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1194 true, send_status, true);
1198 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1201 err = mmc_switch_status(card);
1206 /* Switch HS to HS200 */
1207 val = EXT_CSD_TIMING_HS200 |
1208 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1209 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1210 val, card->ext_csd.generic_cmd6_time, true,
1215 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1218 err = mmc_switch_status(card);
1223 mmc_set_bus_speed(card);
1228 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1233 static void mmc_select_driver_type(struct mmc_card *card)
1235 int card_drv_type, drive_strength, drv_type;
1237 card_drv_type = card->ext_csd.raw_driver_strength |
1238 mmc_driver_type_mask(0);
1240 drive_strength = mmc_select_drive_strength(card,
1241 card->ext_csd.hs200_max_dtr,
1242 card_drv_type, &drv_type);
1244 card->drive_strength = drive_strength;
1247 mmc_set_driver_type(card->host, drv_type);
1251 * For device supporting HS200 mode, the following sequence
1252 * should be done before executing the tuning process.
1253 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1254 * 2. switch to HS200 mode
1255 * 3. set the clock to > 52Mhz and <=200MHz
1257 static int mmc_select_hs200(struct mmc_card *card)
1259 struct mmc_host *host = card->host;
1260 bool send_status = true;
1261 unsigned int old_timing, old_signal_voltage;
1265 old_signal_voltage = host->ios.signal_voltage;
1266 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1267 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1269 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1270 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1272 /* If fails try again during next card power cycle */
1276 mmc_select_driver_type(card);
1278 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1279 send_status = false;
1282 * Set the bus width(4 or 8) with host's support and
1283 * switch to HS200 mode if bus width is set successfully.
1285 err = mmc_select_bus_width(card);
1286 if (!IS_ERR_VALUE(err)) {
1287 val = EXT_CSD_TIMING_HS200 |
1288 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1289 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1290 EXT_CSD_HS_TIMING, val,
1291 card->ext_csd.generic_cmd6_time,
1292 true, send_status, true);
1295 old_timing = host->ios.timing;
1296 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1298 err = mmc_switch_status(card);
1300 * mmc_select_timing() assumes timing has not changed if
1301 * it is a switch error.
1303 if (err == -EBADMSG)
1304 mmc_set_timing(host, old_timing);
1309 /* fall back to the old signal voltage, if fails report error */
1310 if (__mmc_set_signal_voltage(host, old_signal_voltage))
1313 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1320 * Activate High Speed or HS200 mode if supported.
1322 static int mmc_select_timing(struct mmc_card *card)
1326 if (!mmc_can_ext_csd(card))
1329 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1330 err = mmc_select_hs200(card);
1331 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1332 err = mmc_select_hs(card);
1334 if (err && err != -EBADMSG)
1338 pr_warn("%s: switch to %s failed\n",
1339 mmc_card_hs(card) ? "high-speed" :
1340 (mmc_card_hs200(card) ? "hs200" : ""),
1341 mmc_hostname(card->host));
1347 * Set the bus speed to the selected bus timing.
1348 * If timing is not selected, backward compatible is the default.
1350 mmc_set_bus_speed(card);
1355 * Execute tuning sequence to seek the proper bus operating
1356 * conditions for HS200 and HS400, which sends CMD21 to the device.
1358 static int mmc_hs200_tuning(struct mmc_card *card)
1360 struct mmc_host *host = card->host;
1363 * Timing should be adjusted to the HS400 target
1364 * operation frequency for tuning process
1366 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1367 host->ios.bus_width == MMC_BUS_WIDTH_8)
1368 if (host->ops->prepare_hs400_tuning)
1369 host->ops->prepare_hs400_tuning(host, &host->ios);
1371 return mmc_execute_tuning(card);
1375 * Handle the detection and initialisation of a card.
1377 * In the case of a resume, "oldcard" will contain the card
1378 * we're trying to reinitialise.
1380 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1381 struct mmc_card *oldcard)
1383 struct mmc_card *card;
1389 WARN_ON(!host->claimed);
1391 /* Set correct bus mode for MMC before attempting init */
1392 if (!mmc_host_is_spi(host))
1393 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1396 * Since we're changing the OCR value, we seem to
1397 * need to tell some cards to go back to the idle
1398 * state. We wait 1ms to give cards time to
1400 * mmc_go_idle is needed for eMMC that are asleep
1404 /* The extra bit indicates that we support high capacity */
1405 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1410 * For SPI, enable CRC as appropriate.
1412 if (mmc_host_is_spi(host)) {
1413 err = mmc_spi_set_crc(host, use_spi_crc);
1419 * Fetch CID from card.
1421 if (mmc_host_is_spi(host))
1422 err = mmc_send_cid(host, cid);
1424 err = mmc_all_send_cid(host, cid);
1429 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1437 * Allocate card structure.
1439 card = mmc_alloc_card(host, &mmc_type);
1441 err = PTR_ERR(card);
1446 card->type = MMC_TYPE_MMC;
1448 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1452 * Call the optional HC's init_card function to handle quirks.
1454 if (host->ops->init_card)
1455 host->ops->init_card(host, card);
1458 * For native busses: set card RCA and quit open drain mode.
1460 if (!mmc_host_is_spi(host)) {
1461 err = mmc_set_relative_addr(card);
1465 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1470 * Fetch CSD from card.
1472 err = mmc_send_csd(card, card->raw_csd);
1476 err = mmc_decode_csd(card);
1479 err = mmc_decode_cid(card);
1485 * handling only for cards supporting DSR and hosts requesting
1488 if (card->csd.dsr_imp && host->dsr_req)
1492 * Select card, as all following commands rely on that.
1494 if (!mmc_host_is_spi(host)) {
1495 err = mmc_select_card(card);
1501 /* Read extended CSD. */
1502 err = mmc_read_ext_csd(card);
1506 /* If doing byte addressing, check if required to do sector
1507 * addressing. Handle the case of <2GB cards needing sector
1508 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1509 * ocr register has bit 30 set for sector addressing.
1511 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1512 mmc_card_set_blockaddr(card);
1514 /* Erase size depends on CSD and Extended CSD */
1515 mmc_set_erase_size(card);
1519 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1520 * bit. This bit will be lost every time after a reset or power off.
1522 if (card->ext_csd.partition_setting_completed ||
1523 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1524 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1525 EXT_CSD_ERASE_GROUP_DEF, 1,
1526 card->ext_csd.generic_cmd6_time);
1528 if (err && err != -EBADMSG)
1534 * Just disable enhanced area off & sz
1535 * will try to enable ERASE_GROUP_DEF
1536 * during next time reinit
1538 card->ext_csd.enhanced_area_offset = -EINVAL;
1539 card->ext_csd.enhanced_area_size = -EINVAL;
1541 card->ext_csd.erase_group_def = 1;
1543 * enable ERASE_GRP_DEF successfully.
1544 * This will affect the erase size, so
1545 * here need to reset erase size
1547 mmc_set_erase_size(card);
1552 * Ensure eMMC user default partition is enabled
1554 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1555 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1556 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1557 card->ext_csd.part_config,
1558 card->ext_csd.part_time);
1559 if (err && err != -EBADMSG)
1564 * Enable power_off_notification byte in the ext_csd register
1566 if (card->ext_csd.rev >= 6) {
1567 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1568 EXT_CSD_POWER_OFF_NOTIFICATION,
1570 card->ext_csd.generic_cmd6_time);
1571 if (err && err != -EBADMSG)
1575 * The err can be -EBADMSG or 0,
1576 * so check for success and update the flag
1579 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1583 * Select timing interface
1585 err = mmc_select_timing(card);
1589 if (mmc_card_hs200(card)) {
1590 err = mmc_hs200_tuning(card);
1594 err = mmc_select_hs400(card);
1598 /* Select the desired bus width optionally */
1599 err = mmc_select_bus_width(card);
1600 if (!IS_ERR_VALUE(err) && mmc_card_hs(card)) {
1601 err = mmc_select_hs_ddr(card);
1608 * Choose the power class with selected bus interface
1610 mmc_select_powerclass(card);
1613 * Enable HPI feature (if supported)
1615 if (card->ext_csd.hpi) {
1616 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1617 EXT_CSD_HPI_MGMT, 1,
1618 card->ext_csd.generic_cmd6_time);
1619 if (err && err != -EBADMSG)
1622 pr_warn("%s: Enabling HPI failed\n",
1623 mmc_hostname(card->host));
1624 card->ext_csd.hpi_en = 0;
1627 card->ext_csd.hpi_en = 1;
1632 * If cache size is higher than 0, this indicates
1633 * the existence of cache and it can be turned on.
1635 if (card->ext_csd.cache_size > 0) {
1636 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1637 EXT_CSD_CACHE_CTRL, 1,
1638 card->ext_csd.generic_cmd6_time);
1639 if (err && err != -EBADMSG)
1643 * Only if no error, cache is turned on successfully.
1646 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1647 mmc_hostname(card->host), err);
1648 card->ext_csd.cache_ctrl = 0;
1651 card->ext_csd.cache_ctrl = 1;
1656 * The mandatory minimum values are defined for packed command.
1659 if (card->ext_csd.max_packed_writes >= 3 &&
1660 card->ext_csd.max_packed_reads >= 5 &&
1661 host->caps2 & MMC_CAP2_PACKED_CMD) {
1662 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1663 EXT_CSD_EXP_EVENTS_CTRL,
1664 EXT_CSD_PACKED_EVENT_EN,
1665 card->ext_csd.generic_cmd6_time);
1666 if (err && err != -EBADMSG)
1669 pr_warn("%s: Enabling packed event failed\n",
1670 mmc_hostname(card->host));
1671 card->ext_csd.packed_event_en = 0;
1674 card->ext_csd.packed_event_en = 1;
1685 mmc_remove_card(card);
1690 static int mmc_can_sleep(struct mmc_card *card)
1692 return (card && card->ext_csd.rev >= 3);
1695 static int mmc_sleep(struct mmc_host *host)
1697 struct mmc_command cmd = {0};
1698 struct mmc_card *card = host->card;
1699 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1702 /* Re-tuning can't be done once the card is deselected */
1703 mmc_retune_hold(host);
1705 err = mmc_deselect_cards(host);
1709 cmd.opcode = MMC_SLEEP_AWAKE;
1710 cmd.arg = card->rca << 16;
1714 * If the max_busy_timeout of the host is specified, validate it against
1715 * the sleep cmd timeout. A failure means we need to prevent the host
1716 * from doing hw busy detection, which is done by converting to a R1
1717 * response instead of a R1B.
1719 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1720 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1722 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1723 cmd.busy_timeout = timeout_ms;
1726 err = mmc_wait_for_cmd(host, &cmd, 0);
1731 * If the host does not wait while the card signals busy, then we will
1732 * will have to wait the sleep/awake timeout. Note, we cannot use the
1733 * SEND_STATUS command to poll the status because that command (and most
1734 * others) is invalid while the card sleeps.
1736 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1737 mmc_delay(timeout_ms);
1740 mmc_retune_release(host);
1744 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1747 mmc_card_mmc(card) &&
1748 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1751 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1753 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1756 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1757 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1758 timeout = card->ext_csd.power_off_longtime;
1760 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1761 EXT_CSD_POWER_OFF_NOTIFICATION,
1762 notify_type, timeout, true, false, false);
1764 pr_err("%s: Power Off Notification timed out, %u\n",
1765 mmc_hostname(card->host), timeout);
1767 /* Disable the power off notification after the switch operation. */
1768 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1774 * Host is being removed. Free up the current card.
1776 static void mmc_remove(struct mmc_host *host)
1779 BUG_ON(!host->card);
1781 mmc_remove_card(host->card);
1786 * Card detection - card is alive.
1788 static int mmc_alive(struct mmc_host *host)
1790 return mmc_send_status(host->card, NULL);
1794 * Card detection callback from host.
1796 static void mmc_detect(struct mmc_host *host)
1801 BUG_ON(!host->card);
1803 mmc_get_card(host->card);
1806 * Just check if our card has been removed.
1808 err = _mmc_detect_card_removed(host);
1810 mmc_put_card(host->card);
1815 mmc_claim_host(host);
1816 mmc_detach_bus(host);
1817 mmc_power_off(host);
1818 mmc_release_host(host);
1822 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1825 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1826 EXT_CSD_POWER_OFF_LONG;
1829 BUG_ON(!host->card);
1831 mmc_claim_host(host);
1833 if (mmc_card_suspended(host->card))
1836 if (mmc_card_doing_bkops(host->card)) {
1837 err = mmc_stop_bkops(host->card);
1842 err = mmc_flush_cache(host->card);
1846 if (mmc_can_poweroff_notify(host->card) &&
1847 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1848 err = mmc_poweroff_notify(host->card, notify_type);
1849 else if (mmc_can_sleep(host->card))
1850 err = mmc_sleep(host);
1851 else if (!mmc_host_is_spi(host))
1852 err = mmc_deselect_cards(host);
1855 mmc_power_off(host);
1856 mmc_card_set_suspended(host->card);
1859 mmc_release_host(host);
1866 static int mmc_suspend(struct mmc_host *host)
1870 err = _mmc_suspend(host, true);
1872 pm_runtime_disable(&host->card->dev);
1873 pm_runtime_set_suspended(&host->card->dev);
1880 * This function tries to determine if the same card is still present
1881 * and, if so, restore all state to it.
1883 static int _mmc_resume(struct mmc_host *host)
1888 BUG_ON(!host->card);
1890 mmc_claim_host(host);
1892 if (!mmc_card_suspended(host->card))
1895 mmc_power_up(host, host->card->ocr);
1896 err = mmc_init_card(host, host->card->ocr, host->card);
1897 mmc_card_clr_suspended(host->card);
1900 mmc_release_host(host);
1907 static int mmc_shutdown(struct mmc_host *host)
1912 * In a specific case for poweroff notify, we need to resume the card
1913 * before we can shutdown it properly.
1915 if (mmc_can_poweroff_notify(host->card) &&
1916 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1917 err = _mmc_resume(host);
1920 err = _mmc_suspend(host, false);
1926 * Callback for resume.
1928 static int mmc_resume(struct mmc_host *host)
1932 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1933 err = _mmc_resume(host);
1934 pm_runtime_set_active(&host->card->dev);
1935 pm_runtime_mark_last_busy(&host->card->dev);
1937 pm_runtime_enable(&host->card->dev);
1943 * Callback for runtime_suspend.
1945 static int mmc_runtime_suspend(struct mmc_host *host)
1949 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1952 err = _mmc_suspend(host, true);
1954 pr_err("%s: error %d doing aggressive suspend\n",
1955 mmc_hostname(host), err);
1961 * Callback for runtime_resume.
1963 static int mmc_runtime_resume(struct mmc_host *host)
1967 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1970 err = _mmc_resume(host);
1972 pr_err("%s: error %d doing aggressive resume\n",
1973 mmc_hostname(host), err);
1978 int mmc_can_reset(struct mmc_card *card)
1982 rst_n_function = card->ext_csd.rst_n_function;
1983 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
1987 EXPORT_SYMBOL(mmc_can_reset);
1989 static int mmc_reset(struct mmc_host *host)
1991 struct mmc_card *card = host->card;
1993 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
1996 if (!mmc_can_reset(card))
1999 mmc_set_clock(host, host->f_init);
2001 host->ops->hw_reset(host);
2003 /* Set initial state and call mmc_set_ios */
2004 mmc_set_initial_state(host);
2006 return mmc_init_card(host, card->ocr, card);
2009 static const struct mmc_bus_ops mmc_ops = {
2010 .remove = mmc_remove,
2011 .detect = mmc_detect,
2012 .suspend = mmc_suspend,
2013 .resume = mmc_resume,
2014 .runtime_suspend = mmc_runtime_suspend,
2015 .runtime_resume = mmc_runtime_resume,
2017 .shutdown = mmc_shutdown,
2022 * Starting point for MMC card init.
2024 int mmc_attach_mmc(struct mmc_host *host)
2030 WARN_ON(!host->claimed);
2032 /* Set correct bus mode for MMC before attempting attach */
2033 if (!mmc_host_is_spi(host))
2034 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2036 err = mmc_send_op_cond(host, 0, &ocr);
2040 mmc_attach_bus(host, &mmc_ops);
2041 if (host->ocr_avail_mmc)
2042 host->ocr_avail = host->ocr_avail_mmc;
2045 * We need to get OCR a different way for SPI.
2047 if (mmc_host_is_spi(host)) {
2048 err = mmc_spi_read_ocr(host, 1, &ocr);
2053 rocr = mmc_select_voltage(host, ocr);
2056 * Can we support the voltage of the card?
2064 * Detect and init the card.
2066 err = mmc_init_card(host, rocr, NULL);
2070 mmc_release_host(host);
2071 err = mmc_add_card(host->card);
2075 mmc_claim_host(host);
2079 mmc_remove_card(host->card);
2080 mmc_claim_host(host);
2083 mmc_detach_bus(host);
2085 pr_err("%s: error %d whilst initialising MMC card\n",
2086 mmc_hostname(host), err);