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>
28 static const unsigned int tran_exp
[] = {
29 10000, 100000, 1000000, 10000000,
33 static const unsigned char tran_mant
[] = {
34 0, 10, 12, 13, 15, 20, 25, 30,
35 35, 40, 45, 50, 55, 60, 70, 80,
38 static const unsigned int tacc_exp
[] = {
39 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
42 static const unsigned int tacc_mant
[] = {
43 0, 10, 12, 13, 15, 20, 25, 30,
44 35, 40, 45, 50, 55, 60, 70, 80,
47 #define UNSTUFF_BITS(resp,start,size) \
49 const int __size = size; \
50 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
51 const int __off = 3 - ((start) / 32); \
52 const int __shft = (start) & 31; \
55 __res = resp[__off] >> __shft; \
56 if (__size + __shft > 32) \
57 __res |= resp[__off-1] << ((32 - __shft) % 32); \
62 * Given the decoded CSD structure, decode the raw CID to our CID structure.
64 static int mmc_decode_cid(struct mmc_card
*card
)
66 u32
*resp
= card
->raw_cid
;
69 * The selection of the format here is based upon published
70 * specs from sandisk and from what people have reported.
72 switch (card
->csd
.mmca_vsn
) {
73 case 0: /* MMC v1.0 - v1.2 */
74 case 1: /* MMC v1.4 */
75 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 104, 24);
76 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
77 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
78 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
79 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
80 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
81 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
82 card
->cid
.prod_name
[6] = UNSTUFF_BITS(resp
, 48, 8);
83 card
->cid
.hwrev
= UNSTUFF_BITS(resp
, 44, 4);
84 card
->cid
.fwrev
= UNSTUFF_BITS(resp
, 40, 4);
85 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 24);
86 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
87 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
90 case 2: /* MMC v2.0 - v2.2 */
91 case 3: /* MMC v3.1 - v3.3 */
93 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 120, 8);
94 card
->cid
.oemid
= UNSTUFF_BITS(resp
, 104, 16);
95 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
96 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
97 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
98 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
99 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
100 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
101 card
->cid
.prv
= UNSTUFF_BITS(resp
, 48, 8);
102 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 32);
103 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
104 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
108 pr_err("%s: card has unknown MMCA version %d\n",
109 mmc_hostname(card
->host
), card
->csd
.mmca_vsn
);
116 static void mmc_set_erase_size(struct mmc_card
*card
)
118 if (card
->ext_csd
.erase_group_def
& 1)
119 card
->erase_size
= card
->ext_csd
.hc_erase_size
;
121 card
->erase_size
= card
->csd
.erase_size
;
123 mmc_init_erase(card
);
127 * Given a 128-bit response, decode to our card CSD structure.
129 static int mmc_decode_csd(struct mmc_card
*card
)
131 struct mmc_csd
*csd
= &card
->csd
;
132 unsigned int e
, m
, a
, b
;
133 u32
*resp
= card
->raw_csd
;
136 * We only understand CSD structure v1.1 and v1.2.
137 * v1.2 has extra information in bits 15, 11 and 10.
138 * We also support eMMC v4.4 & v4.41.
140 csd
->structure
= UNSTUFF_BITS(resp
, 126, 2);
141 if (csd
->structure
== 0) {
142 pr_err("%s: unrecognised CSD structure version %d\n",
143 mmc_hostname(card
->host
), csd
->structure
);
147 csd
->mmca_vsn
= UNSTUFF_BITS(resp
, 122, 4);
148 m
= UNSTUFF_BITS(resp
, 115, 4);
149 e
= UNSTUFF_BITS(resp
, 112, 3);
150 csd
->tacc_ns
= (tacc_exp
[e
] * tacc_mant
[m
] + 9) / 10;
151 csd
->tacc_clks
= UNSTUFF_BITS(resp
, 104, 8) * 100;
153 m
= UNSTUFF_BITS(resp
, 99, 4);
154 e
= UNSTUFF_BITS(resp
, 96, 3);
155 csd
->max_dtr
= tran_exp
[e
] * tran_mant
[m
];
156 csd
->cmdclass
= UNSTUFF_BITS(resp
, 84, 12);
158 e
= UNSTUFF_BITS(resp
, 47, 3);
159 m
= UNSTUFF_BITS(resp
, 62, 12);
160 csd
->capacity
= (1 + m
) << (e
+ 2);
162 csd
->read_blkbits
= UNSTUFF_BITS(resp
, 80, 4);
163 csd
->read_partial
= UNSTUFF_BITS(resp
, 79, 1);
164 csd
->write_misalign
= UNSTUFF_BITS(resp
, 78, 1);
165 csd
->read_misalign
= UNSTUFF_BITS(resp
, 77, 1);
166 csd
->dsr_imp
= UNSTUFF_BITS(resp
, 76, 1);
167 csd
->r2w_factor
= UNSTUFF_BITS(resp
, 26, 3);
168 csd
->write_blkbits
= UNSTUFF_BITS(resp
, 22, 4);
169 csd
->write_partial
= UNSTUFF_BITS(resp
, 21, 1);
171 if (csd
->write_blkbits
>= 9) {
172 a
= UNSTUFF_BITS(resp
, 42, 5);
173 b
= UNSTUFF_BITS(resp
, 37, 5);
174 csd
->erase_size
= (a
+ 1) * (b
+ 1);
175 csd
->erase_size
<<= csd
->write_blkbits
- 9;
181 static void mmc_select_card_type(struct mmc_card
*card
)
183 struct mmc_host
*host
= card
->host
;
184 u8 card_type
= card
->ext_csd
.raw_card_type
;
185 u32 caps
= host
->caps
, caps2
= host
->caps2
;
186 unsigned int hs_max_dtr
= 0, hs200_max_dtr
= 0;
187 unsigned int avail_type
= 0;
189 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
190 card_type
& EXT_CSD_CARD_TYPE_HS_26
) {
191 hs_max_dtr
= MMC_HIGH_26_MAX_DTR
;
192 avail_type
|= EXT_CSD_CARD_TYPE_HS_26
;
195 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
196 card_type
& EXT_CSD_CARD_TYPE_HS_52
) {
197 hs_max_dtr
= MMC_HIGH_52_MAX_DTR
;
198 avail_type
|= EXT_CSD_CARD_TYPE_HS_52
;
201 if (caps
& MMC_CAP_1_8V_DDR
&&
202 card_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
) {
203 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
204 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_8V
;
207 if (caps
& MMC_CAP_1_2V_DDR
&&
208 card_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
) {
209 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
210 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_2V
;
213 if (caps2
& MMC_CAP2_HS200_1_8V_SDR
&&
214 card_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
) {
215 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
216 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_8V
;
219 if (caps2
& MMC_CAP2_HS200_1_2V_SDR
&&
220 card_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
) {
221 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
222 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_2V
;
225 if (caps2
& MMC_CAP2_HS400_1_8V
&&
226 card_type
& EXT_CSD_CARD_TYPE_HS400_1_8V
) {
227 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
228 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_8V
;
231 if (caps2
& MMC_CAP2_HS400_1_2V
&&
232 card_type
& EXT_CSD_CARD_TYPE_HS400_1_2V
) {
233 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
234 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_2V
;
237 card
->ext_csd
.hs_max_dtr
= hs_max_dtr
;
238 card
->ext_csd
.hs200_max_dtr
= hs200_max_dtr
;
239 card
->mmc_avail_type
= avail_type
;
242 static void mmc_manage_enhanced_area(struct mmc_card
*card
, u8
*ext_csd
)
244 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
247 * Disable these attributes by default
249 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
250 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
253 * Enhanced area feature support -- check whether the eMMC
254 * card has the Enhanced area enabled. If so, export enhanced
255 * area offset and size to user by adding sysfs interface.
257 if ((ext_csd
[EXT_CSD_PARTITION_SUPPORT
] & 0x2) &&
258 (ext_csd
[EXT_CSD_PARTITION_ATTRIBUTE
] & 0x1)) {
259 if (card
->ext_csd
.partition_setting_completed
) {
261 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
263 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
266 * calculate the enhanced data area offset, in bytes
268 card
->ext_csd
.enhanced_area_offset
=
269 (ext_csd
[139] << 24) + (ext_csd
[138] << 16) +
270 (ext_csd
[137] << 8) + ext_csd
[136];
271 if (mmc_card_blockaddr(card
))
272 card
->ext_csd
.enhanced_area_offset
<<= 9;
274 * calculate the enhanced data area size, in kilobytes
276 card
->ext_csd
.enhanced_area_size
=
277 (ext_csd
[142] << 16) + (ext_csd
[141] << 8) +
279 card
->ext_csd
.enhanced_area_size
*=
280 (size_t)(hc_erase_grp_sz
* hc_wp_grp_sz
);
281 card
->ext_csd
.enhanced_area_size
<<= 9;
283 pr_warn("%s: defines enhanced area without partition setting complete\n",
284 mmc_hostname(card
->host
));
289 static void mmc_manage_gp_partitions(struct mmc_card
*card
, u8
*ext_csd
)
292 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
293 unsigned int part_size
;
296 * General purpose partition feature support --
297 * If ext_csd has the size of general purpose partitions,
298 * set size, part_cfg, partition name in mmc_part.
300 if (ext_csd
[EXT_CSD_PARTITION_SUPPORT
] &
301 EXT_CSD_PART_SUPPORT_PART_EN
) {
303 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
305 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
307 for (idx
= 0; idx
< MMC_NUM_GP_PARTITION
; idx
++) {
308 if (!ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3] &&
309 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1] &&
310 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2])
312 if (card
->ext_csd
.partition_setting_completed
== 0) {
313 pr_warn("%s: has partition size defined without partition complete\n",
314 mmc_hostname(card
->host
));
318 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2]
320 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1]
322 ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3];
323 part_size
*= (size_t)(hc_erase_grp_sz
*
325 mmc_part_add(card
, part_size
<< 19,
326 EXT_CSD_PART_CONFIG_ACC_GP0
+ idx
,
328 MMC_BLK_DATA_AREA_GP
);
334 * Decode extended CSD.
336 static int mmc_decode_ext_csd(struct mmc_card
*card
, u8
*ext_csd
)
339 unsigned int part_size
;
340 struct device_node
*np
;
341 bool broken_hpi
= false;
343 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
344 card
->ext_csd
.raw_ext_csd_structure
= ext_csd
[EXT_CSD_STRUCTURE
];
345 if (card
->csd
.structure
== 3) {
346 if (card
->ext_csd
.raw_ext_csd_structure
> 2) {
347 pr_err("%s: unrecognised EXT_CSD structure "
348 "version %d\n", mmc_hostname(card
->host
),
349 card
->ext_csd
.raw_ext_csd_structure
);
355 np
= mmc_of_find_child_device(card
->host
, 0);
356 if (np
&& of_device_is_compatible(np
, "mmc-card"))
357 broken_hpi
= of_property_read_bool(np
, "broken-hpi");
361 * The EXT_CSD format is meant to be forward compatible. As long
362 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
363 * are authorized, see JEDEC JESD84-B50 section B.8.
365 card
->ext_csd
.rev
= ext_csd
[EXT_CSD_REV
];
367 card
->ext_csd
.raw_sectors
[0] = ext_csd
[EXT_CSD_SEC_CNT
+ 0];
368 card
->ext_csd
.raw_sectors
[1] = ext_csd
[EXT_CSD_SEC_CNT
+ 1];
369 card
->ext_csd
.raw_sectors
[2] = ext_csd
[EXT_CSD_SEC_CNT
+ 2];
370 card
->ext_csd
.raw_sectors
[3] = ext_csd
[EXT_CSD_SEC_CNT
+ 3];
371 if (card
->ext_csd
.rev
>= 2) {
372 card
->ext_csd
.sectors
=
373 ext_csd
[EXT_CSD_SEC_CNT
+ 0] << 0 |
374 ext_csd
[EXT_CSD_SEC_CNT
+ 1] << 8 |
375 ext_csd
[EXT_CSD_SEC_CNT
+ 2] << 16 |
376 ext_csd
[EXT_CSD_SEC_CNT
+ 3] << 24;
378 /* Cards with density > 2GiB are sector addressed */
379 if (card
->ext_csd
.sectors
> (2u * 1024 * 1024 * 1024) / 512)
380 mmc_card_set_blockaddr(card
);
383 card
->ext_csd
.raw_card_type
= ext_csd
[EXT_CSD_CARD_TYPE
];
384 mmc_select_card_type(card
);
386 card
->ext_csd
.raw_s_a_timeout
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
387 card
->ext_csd
.raw_erase_timeout_mult
=
388 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
389 card
->ext_csd
.raw_hc_erase_grp_size
=
390 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
391 if (card
->ext_csd
.rev
>= 3) {
392 u8 sa_shift
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
393 card
->ext_csd
.part_config
= ext_csd
[EXT_CSD_PART_CONFIG
];
395 /* EXT_CSD value is in units of 10ms, but we store in ms */
396 card
->ext_csd
.part_time
= 10 * ext_csd
[EXT_CSD_PART_SWITCH_TIME
];
398 /* Sleep / awake timeout in 100ns units */
399 if (sa_shift
> 0 && sa_shift
<= 0x17)
400 card
->ext_csd
.sa_timeout
=
401 1 << ext_csd
[EXT_CSD_S_A_TIMEOUT
];
402 card
->ext_csd
.erase_group_def
=
403 ext_csd
[EXT_CSD_ERASE_GROUP_DEF
];
404 card
->ext_csd
.hc_erase_timeout
= 300 *
405 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
406 card
->ext_csd
.hc_erase_size
=
407 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
] << 10;
409 card
->ext_csd
.rel_sectors
= ext_csd
[EXT_CSD_REL_WR_SEC_C
];
412 * There are two boot regions of equal size, defined in
415 if (ext_csd
[EXT_CSD_BOOT_MULT
] && mmc_boot_partition_access(card
->host
)) {
416 for (idx
= 0; idx
< MMC_NUM_BOOT_PARTITION
; idx
++) {
417 part_size
= ext_csd
[EXT_CSD_BOOT_MULT
] << 17;
418 mmc_part_add(card
, part_size
,
419 EXT_CSD_PART_CONFIG_ACC_BOOT0
+ idx
,
421 MMC_BLK_DATA_AREA_BOOT
);
426 card
->ext_csd
.raw_hc_erase_gap_size
=
427 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
428 card
->ext_csd
.raw_sec_trim_mult
=
429 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
430 card
->ext_csd
.raw_sec_erase_mult
=
431 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
432 card
->ext_csd
.raw_sec_feature_support
=
433 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
434 card
->ext_csd
.raw_trim_mult
=
435 ext_csd
[EXT_CSD_TRIM_MULT
];
436 card
->ext_csd
.raw_partition_support
= ext_csd
[EXT_CSD_PARTITION_SUPPORT
];
437 if (card
->ext_csd
.rev
>= 4) {
438 if (ext_csd
[EXT_CSD_PARTITION_SETTING_COMPLETED
] &
439 EXT_CSD_PART_SETTING_COMPLETED
)
440 card
->ext_csd
.partition_setting_completed
= 1;
442 card
->ext_csd
.partition_setting_completed
= 0;
444 mmc_manage_enhanced_area(card
, ext_csd
);
446 mmc_manage_gp_partitions(card
, ext_csd
);
448 card
->ext_csd
.sec_trim_mult
=
449 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
450 card
->ext_csd
.sec_erase_mult
=
451 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
452 card
->ext_csd
.sec_feature_support
=
453 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
454 card
->ext_csd
.trim_timeout
= 300 *
455 ext_csd
[EXT_CSD_TRIM_MULT
];
458 * Note that the call to mmc_part_add above defaults to read
459 * only. If this default assumption is changed, the call must
460 * take into account the value of boot_locked below.
462 card
->ext_csd
.boot_ro_lock
= ext_csd
[EXT_CSD_BOOT_WP
];
463 card
->ext_csd
.boot_ro_lockable
= true;
465 /* Save power class values */
466 card
->ext_csd
.raw_pwr_cl_52_195
=
467 ext_csd
[EXT_CSD_PWR_CL_52_195
];
468 card
->ext_csd
.raw_pwr_cl_26_195
=
469 ext_csd
[EXT_CSD_PWR_CL_26_195
];
470 card
->ext_csd
.raw_pwr_cl_52_360
=
471 ext_csd
[EXT_CSD_PWR_CL_52_360
];
472 card
->ext_csd
.raw_pwr_cl_26_360
=
473 ext_csd
[EXT_CSD_PWR_CL_26_360
];
474 card
->ext_csd
.raw_pwr_cl_200_195
=
475 ext_csd
[EXT_CSD_PWR_CL_200_195
];
476 card
->ext_csd
.raw_pwr_cl_200_360
=
477 ext_csd
[EXT_CSD_PWR_CL_200_360
];
478 card
->ext_csd
.raw_pwr_cl_ddr_52_195
=
479 ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
];
480 card
->ext_csd
.raw_pwr_cl_ddr_52_360
=
481 ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
];
482 card
->ext_csd
.raw_pwr_cl_ddr_200_360
=
483 ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
];
486 if (card
->ext_csd
.rev
>= 5) {
487 /* Adjust production date as per JEDEC JESD84-B451 */
488 if (card
->cid
.year
< 2010)
489 card
->cid
.year
+= 16;
491 /* check whether the eMMC card supports BKOPS */
492 if (ext_csd
[EXT_CSD_BKOPS_SUPPORT
] & 0x1) {
493 card
->ext_csd
.bkops
= 1;
494 card
->ext_csd
.man_bkops_en
=
495 (ext_csd
[EXT_CSD_BKOPS_EN
] &
496 EXT_CSD_MANUAL_BKOPS_MASK
);
497 card
->ext_csd
.raw_bkops_status
=
498 ext_csd
[EXT_CSD_BKOPS_STATUS
];
499 if (!card
->ext_csd
.man_bkops_en
)
500 pr_info("%s: MAN_BKOPS_EN bit is not set\n",
501 mmc_hostname(card
->host
));
504 /* check whether the eMMC card supports HPI */
505 if (!broken_hpi
&& (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x1)) {
506 card
->ext_csd
.hpi
= 1;
507 if (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x2)
508 card
->ext_csd
.hpi_cmd
= MMC_STOP_TRANSMISSION
;
510 card
->ext_csd
.hpi_cmd
= MMC_SEND_STATUS
;
512 * Indicate the maximum timeout to close
513 * a command interrupted by HPI
515 card
->ext_csd
.out_of_int_time
=
516 ext_csd
[EXT_CSD_OUT_OF_INTERRUPT_TIME
] * 10;
519 card
->ext_csd
.rel_param
= ext_csd
[EXT_CSD_WR_REL_PARAM
];
520 card
->ext_csd
.rst_n_function
= ext_csd
[EXT_CSD_RST_N_FUNCTION
];
523 * RPMB regions are defined in multiples of 128K.
525 card
->ext_csd
.raw_rpmb_size_mult
= ext_csd
[EXT_CSD_RPMB_MULT
];
526 if (ext_csd
[EXT_CSD_RPMB_MULT
] && mmc_host_cmd23(card
->host
)) {
527 mmc_part_add(card
, ext_csd
[EXT_CSD_RPMB_MULT
] << 17,
528 EXT_CSD_PART_CONFIG_ACC_RPMB
,
530 MMC_BLK_DATA_AREA_RPMB
);
534 card
->ext_csd
.raw_erased_mem_count
= ext_csd
[EXT_CSD_ERASED_MEM_CONT
];
535 if (ext_csd
[EXT_CSD_ERASED_MEM_CONT
])
536 card
->erased_byte
= 0xFF;
538 card
->erased_byte
= 0x0;
540 /* eMMC v4.5 or later */
541 if (card
->ext_csd
.rev
>= 6) {
542 card
->ext_csd
.feature_support
|= MMC_DISCARD_FEATURE
;
544 card
->ext_csd
.generic_cmd6_time
= 10 *
545 ext_csd
[EXT_CSD_GENERIC_CMD6_TIME
];
546 card
->ext_csd
.power_off_longtime
= 10 *
547 ext_csd
[EXT_CSD_POWER_OFF_LONG_TIME
];
549 card
->ext_csd
.cache_size
=
550 ext_csd
[EXT_CSD_CACHE_SIZE
+ 0] << 0 |
551 ext_csd
[EXT_CSD_CACHE_SIZE
+ 1] << 8 |
552 ext_csd
[EXT_CSD_CACHE_SIZE
+ 2] << 16 |
553 ext_csd
[EXT_CSD_CACHE_SIZE
+ 3] << 24;
555 if (ext_csd
[EXT_CSD_DATA_SECTOR_SIZE
] == 1)
556 card
->ext_csd
.data_sector_size
= 4096;
558 card
->ext_csd
.data_sector_size
= 512;
560 if ((ext_csd
[EXT_CSD_DATA_TAG_SUPPORT
] & 1) &&
561 (ext_csd
[EXT_CSD_TAG_UNIT_SIZE
] <= 8)) {
562 card
->ext_csd
.data_tag_unit_size
=
563 ((unsigned int) 1 << ext_csd
[EXT_CSD_TAG_UNIT_SIZE
]) *
564 (card
->ext_csd
.data_sector_size
);
566 card
->ext_csd
.data_tag_unit_size
= 0;
569 card
->ext_csd
.max_packed_writes
=
570 ext_csd
[EXT_CSD_MAX_PACKED_WRITES
];
571 card
->ext_csd
.max_packed_reads
=
572 ext_csd
[EXT_CSD_MAX_PACKED_READS
];
574 card
->ext_csd
.data_sector_size
= 512;
577 /* eMMC v5 or later */
578 if (card
->ext_csd
.rev
>= 7) {
579 memcpy(card
->ext_csd
.fwrev
, &ext_csd
[EXT_CSD_FIRMWARE_VERSION
],
581 card
->ext_csd
.ffu_capable
=
582 (ext_csd
[EXT_CSD_SUPPORTED_MODE
] & 0x1) &&
583 !(ext_csd
[EXT_CSD_FW_CONFIG
] & 0x1);
589 static int mmc_read_ext_csd(struct mmc_card
*card
)
594 if (!mmc_can_ext_csd(card
))
597 err
= mmc_get_ext_csd(card
, &ext_csd
);
599 /* If the host or the card can't do the switch,
600 * fail more gracefully. */
607 * High capacity cards should have this "magic" size
608 * stored in their CSD.
610 if (card
->csd
.capacity
== (4096 * 512)) {
611 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
612 mmc_hostname(card
->host
));
614 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
615 mmc_hostname(card
->host
));
622 err
= mmc_decode_ext_csd(card
, ext_csd
);
627 static int mmc_compare_ext_csds(struct mmc_card
*card
, unsigned bus_width
)
632 if (bus_width
== MMC_BUS_WIDTH_1
)
635 err
= mmc_get_ext_csd(card
, &bw_ext_csd
);
639 /* only compare read only fields */
640 err
= !((card
->ext_csd
.raw_partition_support
==
641 bw_ext_csd
[EXT_CSD_PARTITION_SUPPORT
]) &&
642 (card
->ext_csd
.raw_erased_mem_count
==
643 bw_ext_csd
[EXT_CSD_ERASED_MEM_CONT
]) &&
644 (card
->ext_csd
.rev
==
645 bw_ext_csd
[EXT_CSD_REV
]) &&
646 (card
->ext_csd
.raw_ext_csd_structure
==
647 bw_ext_csd
[EXT_CSD_STRUCTURE
]) &&
648 (card
->ext_csd
.raw_card_type
==
649 bw_ext_csd
[EXT_CSD_CARD_TYPE
]) &&
650 (card
->ext_csd
.raw_s_a_timeout
==
651 bw_ext_csd
[EXT_CSD_S_A_TIMEOUT
]) &&
652 (card
->ext_csd
.raw_hc_erase_gap_size
==
653 bw_ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
]) &&
654 (card
->ext_csd
.raw_erase_timeout_mult
==
655 bw_ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
]) &&
656 (card
->ext_csd
.raw_hc_erase_grp_size
==
657 bw_ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
]) &&
658 (card
->ext_csd
.raw_sec_trim_mult
==
659 bw_ext_csd
[EXT_CSD_SEC_TRIM_MULT
]) &&
660 (card
->ext_csd
.raw_sec_erase_mult
==
661 bw_ext_csd
[EXT_CSD_SEC_ERASE_MULT
]) &&
662 (card
->ext_csd
.raw_sec_feature_support
==
663 bw_ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
]) &&
664 (card
->ext_csd
.raw_trim_mult
==
665 bw_ext_csd
[EXT_CSD_TRIM_MULT
]) &&
666 (card
->ext_csd
.raw_sectors
[0] ==
667 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 0]) &&
668 (card
->ext_csd
.raw_sectors
[1] ==
669 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 1]) &&
670 (card
->ext_csd
.raw_sectors
[2] ==
671 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 2]) &&
672 (card
->ext_csd
.raw_sectors
[3] ==
673 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 3]) &&
674 (card
->ext_csd
.raw_pwr_cl_52_195
==
675 bw_ext_csd
[EXT_CSD_PWR_CL_52_195
]) &&
676 (card
->ext_csd
.raw_pwr_cl_26_195
==
677 bw_ext_csd
[EXT_CSD_PWR_CL_26_195
]) &&
678 (card
->ext_csd
.raw_pwr_cl_52_360
==
679 bw_ext_csd
[EXT_CSD_PWR_CL_52_360
]) &&
680 (card
->ext_csd
.raw_pwr_cl_26_360
==
681 bw_ext_csd
[EXT_CSD_PWR_CL_26_360
]) &&
682 (card
->ext_csd
.raw_pwr_cl_200_195
==
683 bw_ext_csd
[EXT_CSD_PWR_CL_200_195
]) &&
684 (card
->ext_csd
.raw_pwr_cl_200_360
==
685 bw_ext_csd
[EXT_CSD_PWR_CL_200_360
]) &&
686 (card
->ext_csd
.raw_pwr_cl_ddr_52_195
==
687 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
]) &&
688 (card
->ext_csd
.raw_pwr_cl_ddr_52_360
==
689 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
]) &&
690 (card
->ext_csd
.raw_pwr_cl_ddr_200_360
==
691 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
]));
700 MMC_DEV_ATTR(cid
, "%08x%08x%08x%08x\n", card
->raw_cid
[0], card
->raw_cid
[1],
701 card
->raw_cid
[2], card
->raw_cid
[3]);
702 MMC_DEV_ATTR(csd
, "%08x%08x%08x%08x\n", card
->raw_csd
[0], card
->raw_csd
[1],
703 card
->raw_csd
[2], card
->raw_csd
[3]);
704 MMC_DEV_ATTR(date
, "%02d/%04d\n", card
->cid
.month
, card
->cid
.year
);
705 MMC_DEV_ATTR(erase_size
, "%u\n", card
->erase_size
<< 9);
706 MMC_DEV_ATTR(preferred_erase_size
, "%u\n", card
->pref_erase
<< 9);
707 MMC_DEV_ATTR(ffu_capable
, "%d\n", card
->ext_csd
.ffu_capable
);
708 MMC_DEV_ATTR(hwrev
, "0x%x\n", card
->cid
.hwrev
);
709 MMC_DEV_ATTR(manfid
, "0x%06x\n", card
->cid
.manfid
);
710 MMC_DEV_ATTR(name
, "%s\n", card
->cid
.prod_name
);
711 MMC_DEV_ATTR(oemid
, "0x%04x\n", card
->cid
.oemid
);
712 MMC_DEV_ATTR(prv
, "0x%x\n", card
->cid
.prv
);
713 MMC_DEV_ATTR(serial
, "0x%08x\n", card
->cid
.serial
);
714 MMC_DEV_ATTR(enhanced_area_offset
, "%llu\n",
715 card
->ext_csd
.enhanced_area_offset
);
716 MMC_DEV_ATTR(enhanced_area_size
, "%u\n", card
->ext_csd
.enhanced_area_size
);
717 MMC_DEV_ATTR(raw_rpmb_size_mult
, "%#x\n", card
->ext_csd
.raw_rpmb_size_mult
);
718 MMC_DEV_ATTR(rel_sectors
, "%#x\n", card
->ext_csd
.rel_sectors
);
720 static ssize_t
mmc_fwrev_show(struct device
*dev
,
721 struct device_attribute
*attr
,
724 struct mmc_card
*card
= mmc_dev_to_card(dev
);
726 if (card
->ext_csd
.rev
< 7) {
727 return sprintf(buf
, "0x%x\n", card
->cid
.fwrev
);
729 return sprintf(buf
, "0x%*phN\n", MMC_FIRMWARE_LEN
,
730 card
->ext_csd
.fwrev
);
734 static DEVICE_ATTR(fwrev
, S_IRUGO
, mmc_fwrev_show
, NULL
);
736 static struct attribute
*mmc_std_attrs
[] = {
740 &dev_attr_erase_size
.attr
,
741 &dev_attr_preferred_erase_size
.attr
,
742 &dev_attr_fwrev
.attr
,
743 &dev_attr_ffu_capable
.attr
,
744 &dev_attr_hwrev
.attr
,
745 &dev_attr_manfid
.attr
,
747 &dev_attr_oemid
.attr
,
749 &dev_attr_serial
.attr
,
750 &dev_attr_enhanced_area_offset
.attr
,
751 &dev_attr_enhanced_area_size
.attr
,
752 &dev_attr_raw_rpmb_size_mult
.attr
,
753 &dev_attr_rel_sectors
.attr
,
756 ATTRIBUTE_GROUPS(mmc_std
);
758 static struct device_type mmc_type
= {
759 .groups
= mmc_std_groups
,
763 * Select the PowerClass for the current bus width
764 * If power class is defined for 4/8 bit bus in the
765 * extended CSD register, select it by executing the
766 * mmc_switch command.
768 static int __mmc_select_powerclass(struct mmc_card
*card
,
769 unsigned int bus_width
)
771 struct mmc_host
*host
= card
->host
;
772 struct mmc_ext_csd
*ext_csd
= &card
->ext_csd
;
773 unsigned int pwrclass_val
= 0;
776 switch (1 << host
->ios
.vdd
) {
777 case MMC_VDD_165_195
:
778 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
779 pwrclass_val
= ext_csd
->raw_pwr_cl_26_195
;
780 else if (host
->ios
.clock
<= MMC_HIGH_52_MAX_DTR
)
781 pwrclass_val
= (bus_width
<= EXT_CSD_BUS_WIDTH_8
) ?
782 ext_csd
->raw_pwr_cl_52_195
:
783 ext_csd
->raw_pwr_cl_ddr_52_195
;
784 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
785 pwrclass_val
= ext_csd
->raw_pwr_cl_200_195
;
796 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
797 pwrclass_val
= ext_csd
->raw_pwr_cl_26_360
;
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_360
:
801 ext_csd
->raw_pwr_cl_ddr_52_360
;
802 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
803 pwrclass_val
= (bus_width
== EXT_CSD_DDR_BUS_WIDTH_8
) ?
804 ext_csd
->raw_pwr_cl_ddr_200_360
:
805 ext_csd
->raw_pwr_cl_200_360
;
808 pr_warn("%s: Voltage range not supported for power class\n",
813 if (bus_width
& (EXT_CSD_BUS_WIDTH_8
| EXT_CSD_DDR_BUS_WIDTH_8
))
814 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_8BIT_MASK
) >>
815 EXT_CSD_PWR_CL_8BIT_SHIFT
;
817 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_4BIT_MASK
) >>
818 EXT_CSD_PWR_CL_4BIT_SHIFT
;
820 /* If the power class is different from the default value */
821 if (pwrclass_val
> 0) {
822 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
825 card
->ext_csd
.generic_cmd6_time
);
831 static int mmc_select_powerclass(struct mmc_card
*card
)
833 struct mmc_host
*host
= card
->host
;
834 u32 bus_width
, ext_csd_bits
;
837 /* Power class selection is supported for versions >= 4.0 */
838 if (!mmc_can_ext_csd(card
))
841 bus_width
= host
->ios
.bus_width
;
842 /* Power class values are defined only for 4/8 bit bus */
843 if (bus_width
== MMC_BUS_WIDTH_1
)
846 ddr
= card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
;
848 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
849 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
851 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
852 EXT_CSD_BUS_WIDTH_8
: EXT_CSD_BUS_WIDTH_4
;
854 err
= __mmc_select_powerclass(card
, ext_csd_bits
);
856 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
857 mmc_hostname(host
), 1 << bus_width
, ddr
);
863 * Set the bus speed for the selected speed mode.
865 static void mmc_set_bus_speed(struct mmc_card
*card
)
867 unsigned int max_dtr
= (unsigned int)-1;
869 if ((mmc_card_hs200(card
) || mmc_card_hs400(card
)) &&
870 max_dtr
> card
->ext_csd
.hs200_max_dtr
)
871 max_dtr
= card
->ext_csd
.hs200_max_dtr
;
872 else if (mmc_card_hs(card
) && max_dtr
> card
->ext_csd
.hs_max_dtr
)
873 max_dtr
= card
->ext_csd
.hs_max_dtr
;
874 else if (max_dtr
> card
->csd
.max_dtr
)
875 max_dtr
= card
->csd
.max_dtr
;
877 mmc_set_clock(card
->host
, max_dtr
);
881 * Select the bus width amoung 4-bit and 8-bit(SDR).
882 * If the bus width is changed successfully, return the selected width value.
883 * Zero is returned instead of error value if the wide width is not supported.
885 static int mmc_select_bus_width(struct mmc_card
*card
)
887 static unsigned ext_csd_bits
[] = {
891 static unsigned bus_widths
[] = {
895 struct mmc_host
*host
= card
->host
;
896 unsigned idx
, bus_width
= 0;
899 if (!mmc_can_ext_csd(card
) ||
900 !(host
->caps
& (MMC_CAP_4_BIT_DATA
| MMC_CAP_8_BIT_DATA
)))
903 idx
= (host
->caps
& MMC_CAP_8_BIT_DATA
) ? 0 : 1;
906 * Unlike SD, MMC cards dont have a configuration register to notify
907 * supported bus width. So bus test command should be run to identify
908 * the supported bus width or compare the ext csd values of current
909 * bus width and ext csd values of 1 bit mode read earlier.
911 for (; idx
< ARRAY_SIZE(bus_widths
); idx
++) {
913 * Host is capable of 8bit transfer, then switch
914 * the device to work in 8bit transfer mode. If the
915 * mmc switch command returns error then switch to
916 * 4bit transfer mode. On success set the corresponding
917 * bus width on the host.
919 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
922 card
->ext_csd
.generic_cmd6_time
);
926 bus_width
= bus_widths
[idx
];
927 mmc_set_bus_width(host
, bus_width
);
930 * If controller can't handle bus width test,
931 * compare ext_csd previously read in 1 bit mode
932 * against ext_csd at new bus width
934 if (!(host
->caps
& MMC_CAP_BUS_WIDTH_TEST
))
935 err
= mmc_compare_ext_csds(card
, bus_width
);
937 err
= mmc_bus_test(card
, bus_width
);
943 pr_warn("%s: switch to bus width %d failed\n",
944 mmc_hostname(host
), ext_csd_bits
[idx
]);
952 * Switch to the high-speed mode
954 static int mmc_select_hs(struct mmc_card
*card
)
958 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
959 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS
,
960 card
->ext_csd
.generic_cmd6_time
,
963 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
969 * Activate wide bus and DDR if supported.
971 static int mmc_select_hs_ddr(struct mmc_card
*card
)
973 struct mmc_host
*host
= card
->host
;
974 u32 bus_width
, ext_csd_bits
;
977 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
))
980 bus_width
= host
->ios
.bus_width
;
981 if (bus_width
== MMC_BUS_WIDTH_1
)
984 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
985 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
987 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
990 card
->ext_csd
.generic_cmd6_time
);
992 pr_err("%s: switch to bus width %d ddr failed\n",
993 mmc_hostname(host
), 1 << bus_width
);
998 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1001 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1003 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1004 * in the JEDEC spec for DDR.
1006 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1007 * host controller can support this, like some of the SDHCI
1008 * controller which connect to an eMMC device. Some of these
1009 * host controller still needs to use 1.8v vccq for supporting
1012 * So the sequence will be:
1013 * if (host and device can both support 1.2v IO)
1015 * else if (host and device can both support 1.8v IO)
1017 * so if host and device can only support 3.3v IO, this is the
1020 * WARNING: eMMC rules are NOT the same as SD DDR
1023 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
)
1024 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1026 if (err
&& (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
))
1027 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1029 /* make sure vccq is 3.3v after switching disaster */
1031 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_330
);
1034 mmc_set_timing(host
, MMC_TIMING_MMC_DDR52
);
1039 static int mmc_select_hs400(struct mmc_card
*card
)
1041 struct mmc_host
*host
= card
->host
;
1045 * HS400 mode requires 8-bit bus width
1047 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1048 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
))
1052 * Before switching to dual data rate operation for HS400,
1053 * it is required to convert from HS200 mode to HS mode.
1055 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
1056 mmc_set_bus_speed(card
);
1058 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1059 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS
,
1060 card
->ext_csd
.generic_cmd6_time
,
1063 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1064 mmc_hostname(host
), err
);
1068 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1070 EXT_CSD_DDR_BUS_WIDTH_8
,
1071 card
->ext_csd
.generic_cmd6_time
);
1073 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1074 mmc_hostname(host
), err
);
1078 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1079 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS400
,
1080 card
->ext_csd
.generic_cmd6_time
,
1083 pr_err("%s: switch to hs400 failed, err:%d\n",
1084 mmc_hostname(host
), err
);
1088 mmc_set_timing(host
, MMC_TIMING_MMC_HS400
);
1089 mmc_set_bus_speed(card
);
1095 * For device supporting HS200 mode, the following sequence
1096 * should be done before executing the tuning process.
1097 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1098 * 2. switch to HS200 mode
1099 * 3. set the clock to > 52Mhz and <=200MHz
1101 static int mmc_select_hs200(struct mmc_card
*card
)
1103 struct mmc_host
*host
= card
->host
;
1106 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
)
1107 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1109 if (err
&& card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
)
1110 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1112 /* If fails try again during next card power cycle */
1117 * Set the bus width(4 or 8) with host's support and
1118 * switch to HS200 mode if bus width is set successfully.
1120 err
= mmc_select_bus_width(card
);
1121 if (!IS_ERR_VALUE(err
)) {
1122 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1123 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS200
,
1124 card
->ext_csd
.generic_cmd6_time
,
1127 mmc_set_timing(host
, MMC_TIMING_MMC_HS200
);
1134 * Activate High Speed or HS200 mode if supported.
1136 static int mmc_select_timing(struct mmc_card
*card
)
1140 if (!mmc_can_ext_csd(card
))
1143 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200
)
1144 err
= mmc_select_hs200(card
);
1145 else if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS
)
1146 err
= mmc_select_hs(card
);
1148 if (err
&& err
!= -EBADMSG
)
1152 pr_warn("%s: switch to %s failed\n",
1153 mmc_card_hs(card
) ? "high-speed" :
1154 (mmc_card_hs200(card
) ? "hs200" : ""),
1155 mmc_hostname(card
->host
));
1161 * Set the bus speed to the selected bus timing.
1162 * If timing is not selected, backward compatible is the default.
1164 mmc_set_bus_speed(card
);
1169 * Execute tuning sequence to seek the proper bus operating
1170 * conditions for HS200 and HS400, which sends CMD21 to the device.
1172 static int mmc_hs200_tuning(struct mmc_card
*card
)
1174 struct mmc_host
*host
= card
->host
;
1177 * Timing should be adjusted to the HS400 target
1178 * operation frequency for tuning process
1180 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1181 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
)
1182 if (host
->ops
->prepare_hs400_tuning
)
1183 host
->ops
->prepare_hs400_tuning(host
, &host
->ios
);
1185 return mmc_execute_tuning(card
);
1189 * Handle the detection and initialisation of a card.
1191 * In the case of a resume, "oldcard" will contain the card
1192 * we're trying to reinitialise.
1194 static int mmc_init_card(struct mmc_host
*host
, u32 ocr
,
1195 struct mmc_card
*oldcard
)
1197 struct mmc_card
*card
;
1203 WARN_ON(!host
->claimed
);
1205 /* Set correct bus mode for MMC before attempting init */
1206 if (!mmc_host_is_spi(host
))
1207 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
1210 * Since we're changing the OCR value, we seem to
1211 * need to tell some cards to go back to the idle
1212 * state. We wait 1ms to give cards time to
1214 * mmc_go_idle is needed for eMMC that are asleep
1218 /* The extra bit indicates that we support high capacity */
1219 err
= mmc_send_op_cond(host
, ocr
| (1 << 30), &rocr
);
1224 * For SPI, enable CRC as appropriate.
1226 if (mmc_host_is_spi(host
)) {
1227 err
= mmc_spi_set_crc(host
, use_spi_crc
);
1233 * Fetch CID from card.
1235 if (mmc_host_is_spi(host
))
1236 err
= mmc_send_cid(host
, cid
);
1238 err
= mmc_all_send_cid(host
, cid
);
1243 if (memcmp(cid
, oldcard
->raw_cid
, sizeof(cid
)) != 0) {
1251 * Allocate card structure.
1253 card
= mmc_alloc_card(host
, &mmc_type
);
1255 err
= PTR_ERR(card
);
1260 card
->type
= MMC_TYPE_MMC
;
1262 memcpy(card
->raw_cid
, cid
, sizeof(card
->raw_cid
));
1266 * Call the optional HC's init_card function to handle quirks.
1268 if (host
->ops
->init_card
)
1269 host
->ops
->init_card(host
, card
);
1272 * For native busses: set card RCA and quit open drain mode.
1274 if (!mmc_host_is_spi(host
)) {
1275 err
= mmc_set_relative_addr(card
);
1279 mmc_set_bus_mode(host
, MMC_BUSMODE_PUSHPULL
);
1284 * Fetch CSD from card.
1286 err
= mmc_send_csd(card
, card
->raw_csd
);
1290 err
= mmc_decode_csd(card
);
1293 err
= mmc_decode_cid(card
);
1299 * handling only for cards supporting DSR and hosts requesting
1302 if (card
->csd
.dsr_imp
&& host
->dsr_req
)
1306 * Select card, as all following commands rely on that.
1308 if (!mmc_host_is_spi(host
)) {
1309 err
= mmc_select_card(card
);
1315 /* Read extended CSD. */
1316 err
= mmc_read_ext_csd(card
);
1320 /* If doing byte addressing, check if required to do sector
1321 * addressing. Handle the case of <2GB cards needing sector
1322 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1323 * ocr register has bit 30 set for sector addressing.
1325 if (!(mmc_card_blockaddr(card
)) && (rocr
& (1<<30)))
1326 mmc_card_set_blockaddr(card
);
1328 /* Erase size depends on CSD and Extended CSD */
1329 mmc_set_erase_size(card
);
1333 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1334 * bit. This bit will be lost every time after a reset or power off.
1336 if (card
->ext_csd
.partition_setting_completed
||
1337 (card
->ext_csd
.rev
>= 3 && (host
->caps2
& MMC_CAP2_HC_ERASE_SZ
))) {
1338 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1339 EXT_CSD_ERASE_GROUP_DEF
, 1,
1340 card
->ext_csd
.generic_cmd6_time
);
1342 if (err
&& err
!= -EBADMSG
)
1348 * Just disable enhanced area off & sz
1349 * will try to enable ERASE_GROUP_DEF
1350 * during next time reinit
1352 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
1353 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
1355 card
->ext_csd
.erase_group_def
= 1;
1357 * enable ERASE_GRP_DEF successfully.
1358 * This will affect the erase size, so
1359 * here need to reset erase size
1361 mmc_set_erase_size(card
);
1366 * Ensure eMMC user default partition is enabled
1368 if (card
->ext_csd
.part_config
& EXT_CSD_PART_CONFIG_ACC_MASK
) {
1369 card
->ext_csd
.part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
1370 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_PART_CONFIG
,
1371 card
->ext_csd
.part_config
,
1372 card
->ext_csd
.part_time
);
1373 if (err
&& err
!= -EBADMSG
)
1378 * Enable power_off_notification byte in the ext_csd register
1380 if (card
->ext_csd
.rev
>= 6) {
1381 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1382 EXT_CSD_POWER_OFF_NOTIFICATION
,
1384 card
->ext_csd
.generic_cmd6_time
);
1385 if (err
&& err
!= -EBADMSG
)
1389 * The err can be -EBADMSG or 0,
1390 * so check for success and update the flag
1393 card
->ext_csd
.power_off_notification
= EXT_CSD_POWER_ON
;
1397 * Select timing interface
1399 err
= mmc_select_timing(card
);
1403 if (mmc_card_hs200(card
)) {
1404 err
= mmc_hs200_tuning(card
);
1408 err
= mmc_select_hs400(card
);
1411 } else if (mmc_card_hs(card
)) {
1412 /* Select the desired bus width optionally */
1413 err
= mmc_select_bus_width(card
);
1414 if (!IS_ERR_VALUE(err
)) {
1415 err
= mmc_select_hs_ddr(card
);
1422 * Choose the power class with selected bus interface
1424 mmc_select_powerclass(card
);
1427 * Enable HPI feature (if supported)
1429 if (card
->ext_csd
.hpi
) {
1430 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1431 EXT_CSD_HPI_MGMT
, 1,
1432 card
->ext_csd
.generic_cmd6_time
);
1433 if (err
&& err
!= -EBADMSG
)
1436 pr_warn("%s: Enabling HPI failed\n",
1437 mmc_hostname(card
->host
));
1440 card
->ext_csd
.hpi_en
= 1;
1444 * If cache size is higher than 0, this indicates
1445 * the existence of cache and it can be turned on.
1447 if (card
->ext_csd
.cache_size
> 0) {
1448 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1449 EXT_CSD_CACHE_CTRL
, 1,
1450 card
->ext_csd
.generic_cmd6_time
);
1451 if (err
&& err
!= -EBADMSG
)
1455 * Only if no error, cache is turned on successfully.
1458 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1459 mmc_hostname(card
->host
), err
);
1460 card
->ext_csd
.cache_ctrl
= 0;
1463 card
->ext_csd
.cache_ctrl
= 1;
1468 * The mandatory minimum values are defined for packed command.
1471 if (card
->ext_csd
.max_packed_writes
>= 3 &&
1472 card
->ext_csd
.max_packed_reads
>= 5 &&
1473 host
->caps2
& MMC_CAP2_PACKED_CMD
) {
1474 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1475 EXT_CSD_EXP_EVENTS_CTRL
,
1476 EXT_CSD_PACKED_EVENT_EN
,
1477 card
->ext_csd
.generic_cmd6_time
);
1478 if (err
&& err
!= -EBADMSG
)
1481 pr_warn("%s: Enabling packed event failed\n",
1482 mmc_hostname(card
->host
));
1483 card
->ext_csd
.packed_event_en
= 0;
1486 card
->ext_csd
.packed_event_en
= 1;
1497 mmc_remove_card(card
);
1502 static int mmc_can_sleep(struct mmc_card
*card
)
1504 return (card
&& card
->ext_csd
.rev
>= 3);
1507 static int mmc_sleep(struct mmc_host
*host
)
1509 struct mmc_command cmd
= {0};
1510 struct mmc_card
*card
= host
->card
;
1511 unsigned int timeout_ms
= DIV_ROUND_UP(card
->ext_csd
.sa_timeout
, 10000);
1514 err
= mmc_deselect_cards(host
);
1518 cmd
.opcode
= MMC_SLEEP_AWAKE
;
1519 cmd
.arg
= card
->rca
<< 16;
1523 * If the max_busy_timeout of the host is specified, validate it against
1524 * the sleep cmd timeout. A failure means we need to prevent the host
1525 * from doing hw busy detection, which is done by converting to a R1
1526 * response instead of a R1B.
1528 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
)) {
1529 cmd
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1531 cmd
.flags
= MMC_RSP_R1B
| MMC_CMD_AC
;
1532 cmd
.busy_timeout
= timeout_ms
;
1535 err
= mmc_wait_for_cmd(host
, &cmd
, 0);
1540 * If the host does not wait while the card signals busy, then we will
1541 * will have to wait the sleep/awake timeout. Note, we cannot use the
1542 * SEND_STATUS command to poll the status because that command (and most
1543 * others) is invalid while the card sleeps.
1545 if (!cmd
.busy_timeout
|| !(host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
))
1546 mmc_delay(timeout_ms
);
1551 static int mmc_can_poweroff_notify(const struct mmc_card
*card
)
1554 mmc_card_mmc(card
) &&
1555 (card
->ext_csd
.power_off_notification
== EXT_CSD_POWER_ON
);
1558 static int mmc_poweroff_notify(struct mmc_card
*card
, unsigned int notify_type
)
1560 unsigned int timeout
= card
->ext_csd
.generic_cmd6_time
;
1563 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1564 if (notify_type
== EXT_CSD_POWER_OFF_LONG
)
1565 timeout
= card
->ext_csd
.power_off_longtime
;
1567 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1568 EXT_CSD_POWER_OFF_NOTIFICATION
,
1569 notify_type
, timeout
, true, false, false);
1571 pr_err("%s: Power Off Notification timed out, %u\n",
1572 mmc_hostname(card
->host
), timeout
);
1574 /* Disable the power off notification after the switch operation. */
1575 card
->ext_csd
.power_off_notification
= EXT_CSD_NO_POWER_NOTIFICATION
;
1581 * Host is being removed. Free up the current card.
1583 static void mmc_remove(struct mmc_host
*host
)
1586 BUG_ON(!host
->card
);
1588 mmc_remove_card(host
->card
);
1593 * Card detection - card is alive.
1595 static int mmc_alive(struct mmc_host
*host
)
1597 return mmc_send_status(host
->card
, NULL
);
1601 * Card detection callback from host.
1603 static void mmc_detect(struct mmc_host
*host
)
1608 BUG_ON(!host
->card
);
1610 mmc_get_card(host
->card
);
1613 * Just check if our card has been removed.
1615 err
= _mmc_detect_card_removed(host
);
1617 mmc_put_card(host
->card
);
1622 mmc_claim_host(host
);
1623 mmc_detach_bus(host
);
1624 mmc_power_off(host
);
1625 mmc_release_host(host
);
1629 static int _mmc_suspend(struct mmc_host
*host
, bool is_suspend
)
1632 unsigned int notify_type
= is_suspend
? EXT_CSD_POWER_OFF_SHORT
:
1633 EXT_CSD_POWER_OFF_LONG
;
1636 BUG_ON(!host
->card
);
1638 mmc_claim_host(host
);
1640 if (mmc_card_suspended(host
->card
))
1643 if (mmc_card_doing_bkops(host
->card
)) {
1644 err
= mmc_stop_bkops(host
->card
);
1649 err
= mmc_flush_cache(host
->card
);
1653 if (mmc_can_poweroff_notify(host
->card
) &&
1654 ((host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
) || !is_suspend
))
1655 err
= mmc_poweroff_notify(host
->card
, notify_type
);
1656 else if (mmc_can_sleep(host
->card
))
1657 err
= mmc_sleep(host
);
1658 else if (!mmc_host_is_spi(host
))
1659 err
= mmc_deselect_cards(host
);
1662 mmc_power_off(host
);
1663 mmc_card_set_suspended(host
->card
);
1666 mmc_release_host(host
);
1673 static int mmc_suspend(struct mmc_host
*host
)
1677 err
= _mmc_suspend(host
, true);
1679 pm_runtime_disable(&host
->card
->dev
);
1680 pm_runtime_set_suspended(&host
->card
->dev
);
1687 * This function tries to determine if the same card is still present
1688 * and, if so, restore all state to it.
1690 static int _mmc_resume(struct mmc_host
*host
)
1695 BUG_ON(!host
->card
);
1697 mmc_claim_host(host
);
1699 if (!mmc_card_suspended(host
->card
))
1702 mmc_power_up(host
, host
->card
->ocr
);
1703 err
= mmc_init_card(host
, host
->card
->ocr
, host
->card
);
1704 mmc_card_clr_suspended(host
->card
);
1707 mmc_release_host(host
);
1714 static int mmc_shutdown(struct mmc_host
*host
)
1719 * In a specific case for poweroff notify, we need to resume the card
1720 * before we can shutdown it properly.
1722 if (mmc_can_poweroff_notify(host
->card
) &&
1723 !(host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
))
1724 err
= _mmc_resume(host
);
1727 err
= _mmc_suspend(host
, false);
1733 * Callback for resume.
1735 static int mmc_resume(struct mmc_host
*host
)
1739 if (!(host
->caps
& MMC_CAP_RUNTIME_RESUME
)) {
1740 err
= _mmc_resume(host
);
1741 pm_runtime_set_active(&host
->card
->dev
);
1742 pm_runtime_mark_last_busy(&host
->card
->dev
);
1744 pm_runtime_enable(&host
->card
->dev
);
1750 * Callback for runtime_suspend.
1752 static int mmc_runtime_suspend(struct mmc_host
*host
)
1756 if (!(host
->caps
& MMC_CAP_AGGRESSIVE_PM
))
1759 err
= _mmc_suspend(host
, true);
1761 pr_err("%s: error %d doing aggressive suspend\n",
1762 mmc_hostname(host
), err
);
1768 * Callback for runtime_resume.
1770 static int mmc_runtime_resume(struct mmc_host
*host
)
1774 if (!(host
->caps
& (MMC_CAP_AGGRESSIVE_PM
| MMC_CAP_RUNTIME_RESUME
)))
1777 err
= _mmc_resume(host
);
1779 pr_err("%s: error %d doing aggressive resume\n",
1780 mmc_hostname(host
), err
);
1785 static int mmc_power_restore(struct mmc_host
*host
)
1789 mmc_claim_host(host
);
1790 ret
= mmc_init_card(host
, host
->card
->ocr
, host
->card
);
1791 mmc_release_host(host
);
1796 int mmc_can_reset(struct mmc_card
*card
)
1800 rst_n_function
= card
->ext_csd
.rst_n_function
;
1801 if ((rst_n_function
& EXT_CSD_RST_N_EN_MASK
) != EXT_CSD_RST_N_ENABLED
)
1805 EXPORT_SYMBOL(mmc_can_reset
);
1807 static int mmc_reset(struct mmc_host
*host
)
1809 struct mmc_card
*card
= host
->card
;
1812 if (!(host
->caps
& MMC_CAP_HW_RESET
) || !host
->ops
->hw_reset
)
1815 if (!mmc_can_reset(card
))
1818 mmc_host_clk_hold(host
);
1819 mmc_set_clock(host
, host
->f_init
);
1821 host
->ops
->hw_reset(host
);
1823 /* If the reset has happened, then a status command will fail */
1824 if (!mmc_send_status(card
, &status
)) {
1825 mmc_host_clk_release(host
);
1829 /* Set initial state and call mmc_set_ios */
1830 mmc_set_initial_state(host
);
1831 mmc_host_clk_release(host
);
1833 return mmc_power_restore(host
);
1836 static const struct mmc_bus_ops mmc_ops
= {
1837 .remove
= mmc_remove
,
1838 .detect
= mmc_detect
,
1839 .suspend
= mmc_suspend
,
1840 .resume
= mmc_resume
,
1841 .runtime_suspend
= mmc_runtime_suspend
,
1842 .runtime_resume
= mmc_runtime_resume
,
1843 .power_restore
= mmc_power_restore
,
1845 .shutdown
= mmc_shutdown
,
1850 * Starting point for MMC card init.
1852 int mmc_attach_mmc(struct mmc_host
*host
)
1858 WARN_ON(!host
->claimed
);
1860 /* Set correct bus mode for MMC before attempting attach */
1861 if (!mmc_host_is_spi(host
))
1862 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
1864 err
= mmc_send_op_cond(host
, 0, &ocr
);
1868 mmc_attach_bus(host
, &mmc_ops
);
1869 if (host
->ocr_avail_mmc
)
1870 host
->ocr_avail
= host
->ocr_avail_mmc
;
1873 * We need to get OCR a different way for SPI.
1875 if (mmc_host_is_spi(host
)) {
1876 err
= mmc_spi_read_ocr(host
, 1, &ocr
);
1881 rocr
= mmc_select_voltage(host
, ocr
);
1884 * Can we support the voltage of the card?
1892 * Detect and init the card.
1894 err
= mmc_init_card(host
, rocr
, NULL
);
1898 mmc_release_host(host
);
1899 err
= mmc_add_card(host
->card
);
1900 mmc_claim_host(host
);
1907 mmc_release_host(host
);
1908 mmc_remove_card(host
->card
);
1909 mmc_claim_host(host
);
1912 mmc_detach_bus(host
);
1914 pr_err("%s: error %d whilst initialising MMC card\n",
1915 mmc_hostname(host
), err
);