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>
14 #include <linux/slab.h>
15 #include <linux/stat.h>
16 #include <linux/pm_runtime.h>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/mmc.h>
27 static const unsigned int tran_exp
[] = {
28 10000, 100000, 1000000, 10000000,
32 static const unsigned char tran_mant
[] = {
33 0, 10, 12, 13, 15, 20, 25, 30,
34 35, 40, 45, 50, 55, 60, 70, 80,
37 static const unsigned int tacc_exp
[] = {
38 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
41 static const unsigned int tacc_mant
[] = {
42 0, 10, 12, 13, 15, 20, 25, 30,
43 35, 40, 45, 50, 55, 60, 70, 80,
46 #define UNSTUFF_BITS(resp,start,size) \
48 const int __size = size; \
49 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
50 const int __off = 3 - ((start) / 32); \
51 const int __shft = (start) & 31; \
54 __res = resp[__off] >> __shft; \
55 if (__size + __shft > 32) \
56 __res |= resp[__off-1] << ((32 - __shft) % 32); \
61 * Given the decoded CSD structure, decode the raw CID to our CID structure.
63 static int mmc_decode_cid(struct mmc_card
*card
)
65 u32
*resp
= card
->raw_cid
;
68 * The selection of the format here is based upon published
69 * specs from sandisk and from what people have reported.
71 switch (card
->csd
.mmca_vsn
) {
72 case 0: /* MMC v1.0 - v1.2 */
73 case 1: /* MMC v1.4 */
74 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 104, 24);
75 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
76 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
77 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
78 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
79 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
80 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
81 card
->cid
.prod_name
[6] = UNSTUFF_BITS(resp
, 48, 8);
82 card
->cid
.hwrev
= UNSTUFF_BITS(resp
, 44, 4);
83 card
->cid
.fwrev
= UNSTUFF_BITS(resp
, 40, 4);
84 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 24);
85 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
86 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
89 case 2: /* MMC v2.0 - v2.2 */
90 case 3: /* MMC v3.1 - v3.3 */
92 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 120, 8);
93 card
->cid
.oemid
= UNSTUFF_BITS(resp
, 104, 16);
94 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
95 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
96 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
97 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
98 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
99 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
100 card
->cid
.prv
= UNSTUFF_BITS(resp
, 48, 8);
101 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 32);
102 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
103 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
107 pr_err("%s: card has unknown MMCA version %d\n",
108 mmc_hostname(card
->host
), card
->csd
.mmca_vsn
);
115 static void mmc_set_erase_size(struct mmc_card
*card
)
117 if (card
->ext_csd
.erase_group_def
& 1)
118 card
->erase_size
= card
->ext_csd
.hc_erase_size
;
120 card
->erase_size
= card
->csd
.erase_size
;
122 mmc_init_erase(card
);
126 * Given a 128-bit response, decode to our card CSD structure.
128 static int mmc_decode_csd(struct mmc_card
*card
)
130 struct mmc_csd
*csd
= &card
->csd
;
131 unsigned int e
, m
, a
, b
;
132 u32
*resp
= card
->raw_csd
;
135 * We only understand CSD structure v1.1 and v1.2.
136 * v1.2 has extra information in bits 15, 11 and 10.
137 * We also support eMMC v4.4 & v4.41.
139 csd
->structure
= UNSTUFF_BITS(resp
, 126, 2);
140 if (csd
->structure
== 0) {
141 pr_err("%s: unrecognised CSD structure version %d\n",
142 mmc_hostname(card
->host
), csd
->structure
);
146 csd
->mmca_vsn
= UNSTUFF_BITS(resp
, 122, 4);
147 m
= UNSTUFF_BITS(resp
, 115, 4);
148 e
= UNSTUFF_BITS(resp
, 112, 3);
149 csd
->tacc_ns
= (tacc_exp
[e
] * tacc_mant
[m
] + 9) / 10;
150 csd
->tacc_clks
= UNSTUFF_BITS(resp
, 104, 8) * 100;
152 m
= UNSTUFF_BITS(resp
, 99, 4);
153 e
= UNSTUFF_BITS(resp
, 96, 3);
154 csd
->max_dtr
= tran_exp
[e
] * tran_mant
[m
];
155 csd
->cmdclass
= UNSTUFF_BITS(resp
, 84, 12);
157 e
= UNSTUFF_BITS(resp
, 47, 3);
158 m
= UNSTUFF_BITS(resp
, 62, 12);
159 csd
->capacity
= (1 + m
) << (e
+ 2);
161 csd
->read_blkbits
= UNSTUFF_BITS(resp
, 80, 4);
162 csd
->read_partial
= UNSTUFF_BITS(resp
, 79, 1);
163 csd
->write_misalign
= UNSTUFF_BITS(resp
, 78, 1);
164 csd
->read_misalign
= UNSTUFF_BITS(resp
, 77, 1);
165 csd
->dsr_imp
= UNSTUFF_BITS(resp
, 76, 1);
166 csd
->r2w_factor
= UNSTUFF_BITS(resp
, 26, 3);
167 csd
->write_blkbits
= UNSTUFF_BITS(resp
, 22, 4);
168 csd
->write_partial
= UNSTUFF_BITS(resp
, 21, 1);
170 if (csd
->write_blkbits
>= 9) {
171 a
= UNSTUFF_BITS(resp
, 42, 5);
172 b
= UNSTUFF_BITS(resp
, 37, 5);
173 csd
->erase_size
= (a
+ 1) * (b
+ 1);
174 csd
->erase_size
<<= csd
->write_blkbits
- 9;
180 static void mmc_select_card_type(struct mmc_card
*card
)
182 struct mmc_host
*host
= card
->host
;
183 u8 card_type
= card
->ext_csd
.raw_card_type
;
184 u32 caps
= host
->caps
, caps2
= host
->caps2
;
185 unsigned int hs_max_dtr
= 0, hs200_max_dtr
= 0;
186 unsigned int avail_type
= 0;
188 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
189 card_type
& EXT_CSD_CARD_TYPE_HS_26
) {
190 hs_max_dtr
= MMC_HIGH_26_MAX_DTR
;
191 avail_type
|= EXT_CSD_CARD_TYPE_HS_26
;
194 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
195 card_type
& EXT_CSD_CARD_TYPE_HS_52
) {
196 hs_max_dtr
= MMC_HIGH_52_MAX_DTR
;
197 avail_type
|= EXT_CSD_CARD_TYPE_HS_52
;
200 if (caps
& MMC_CAP_1_8V_DDR
&&
201 card_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
) {
202 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
203 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_8V
;
206 if (caps
& MMC_CAP_1_2V_DDR
&&
207 card_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
) {
208 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
209 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_2V
;
212 if (caps2
& MMC_CAP2_HS200_1_8V_SDR
&&
213 card_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
) {
214 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
215 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_8V
;
218 if (caps2
& MMC_CAP2_HS200_1_2V_SDR
&&
219 card_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
) {
220 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
221 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_2V
;
224 if (caps2
& MMC_CAP2_HS400_1_8V
&&
225 card_type
& EXT_CSD_CARD_TYPE_HS400_1_8V
) {
226 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
227 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_8V
;
230 if (caps2
& MMC_CAP2_HS400_1_2V
&&
231 card_type
& EXT_CSD_CARD_TYPE_HS400_1_2V
) {
232 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
233 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_2V
;
236 card
->ext_csd
.hs_max_dtr
= hs_max_dtr
;
237 card
->ext_csd
.hs200_max_dtr
= hs200_max_dtr
;
238 card
->mmc_avail_type
= avail_type
;
241 static void mmc_manage_enhanced_area(struct mmc_card
*card
, u8
*ext_csd
)
243 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
246 * Disable these attributes by default
248 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
249 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
252 * Enhanced area feature support -- check whether the eMMC
253 * card has the Enhanced area enabled. If so, export enhanced
254 * area offset and size to user by adding sysfs interface.
256 if ((ext_csd
[EXT_CSD_PARTITION_SUPPORT
] & 0x2) &&
257 (ext_csd
[EXT_CSD_PARTITION_ATTRIBUTE
] & 0x1)) {
258 if (card
->ext_csd
.partition_setting_completed
) {
260 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
262 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
265 * calculate the enhanced data area offset, in bytes
267 card
->ext_csd
.enhanced_area_offset
=
268 (ext_csd
[139] << 24) + (ext_csd
[138] << 16) +
269 (ext_csd
[137] << 8) + ext_csd
[136];
270 if (mmc_card_blockaddr(card
))
271 card
->ext_csd
.enhanced_area_offset
<<= 9;
273 * calculate the enhanced data area size, in kilobytes
275 card
->ext_csd
.enhanced_area_size
=
276 (ext_csd
[142] << 16) + (ext_csd
[141] << 8) +
278 card
->ext_csd
.enhanced_area_size
*=
279 (size_t)(hc_erase_grp_sz
* hc_wp_grp_sz
);
280 card
->ext_csd
.enhanced_area_size
<<= 9;
282 pr_warn("%s: defines enhanced area without partition setting complete\n",
283 mmc_hostname(card
->host
));
288 static void mmc_manage_gp_partitions(struct mmc_card
*card
, u8
*ext_csd
)
291 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
292 unsigned int part_size
;
295 * General purpose partition feature support --
296 * If ext_csd has the size of general purpose partitions,
297 * set size, part_cfg, partition name in mmc_part.
299 if (ext_csd
[EXT_CSD_PARTITION_SUPPORT
] &
300 EXT_CSD_PART_SUPPORT_PART_EN
) {
302 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
304 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
306 for (idx
= 0; idx
< MMC_NUM_GP_PARTITION
; idx
++) {
307 if (!ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3] &&
308 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1] &&
309 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2])
311 if (card
->ext_csd
.partition_setting_completed
== 0) {
312 pr_warn("%s: has partition size defined without partition complete\n",
313 mmc_hostname(card
->host
));
317 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2]
319 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1]
321 ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3];
322 part_size
*= (size_t)(hc_erase_grp_sz
*
324 mmc_part_add(card
, part_size
<< 19,
325 EXT_CSD_PART_CONFIG_ACC_GP0
+ idx
,
327 MMC_BLK_DATA_AREA_GP
);
333 * Decode extended CSD.
335 static int mmc_decode_ext_csd(struct mmc_card
*card
, u8
*ext_csd
)
338 unsigned int part_size
;
340 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
341 card
->ext_csd
.raw_ext_csd_structure
= ext_csd
[EXT_CSD_STRUCTURE
];
342 if (card
->csd
.structure
== 3) {
343 if (card
->ext_csd
.raw_ext_csd_structure
> 2) {
344 pr_err("%s: unrecognised EXT_CSD structure "
345 "version %d\n", mmc_hostname(card
->host
),
346 card
->ext_csd
.raw_ext_csd_structure
);
353 * The EXT_CSD format is meant to be forward compatible. As long
354 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
355 * are authorized, see JEDEC JESD84-B50 section B.8.
357 card
->ext_csd
.rev
= ext_csd
[EXT_CSD_REV
];
359 card
->ext_csd
.raw_sectors
[0] = ext_csd
[EXT_CSD_SEC_CNT
+ 0];
360 card
->ext_csd
.raw_sectors
[1] = ext_csd
[EXT_CSD_SEC_CNT
+ 1];
361 card
->ext_csd
.raw_sectors
[2] = ext_csd
[EXT_CSD_SEC_CNT
+ 2];
362 card
->ext_csd
.raw_sectors
[3] = ext_csd
[EXT_CSD_SEC_CNT
+ 3];
363 if (card
->ext_csd
.rev
>= 2) {
364 card
->ext_csd
.sectors
=
365 ext_csd
[EXT_CSD_SEC_CNT
+ 0] << 0 |
366 ext_csd
[EXT_CSD_SEC_CNT
+ 1] << 8 |
367 ext_csd
[EXT_CSD_SEC_CNT
+ 2] << 16 |
368 ext_csd
[EXT_CSD_SEC_CNT
+ 3] << 24;
370 /* Cards with density > 2GiB are sector addressed */
371 if (card
->ext_csd
.sectors
> (2u * 1024 * 1024 * 1024) / 512)
372 mmc_card_set_blockaddr(card
);
375 card
->ext_csd
.raw_card_type
= ext_csd
[EXT_CSD_CARD_TYPE
];
376 mmc_select_card_type(card
);
378 card
->ext_csd
.raw_s_a_timeout
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
379 card
->ext_csd
.raw_erase_timeout_mult
=
380 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
381 card
->ext_csd
.raw_hc_erase_grp_size
=
382 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
383 if (card
->ext_csd
.rev
>= 3) {
384 u8 sa_shift
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
385 card
->ext_csd
.part_config
= ext_csd
[EXT_CSD_PART_CONFIG
];
387 /* EXT_CSD value is in units of 10ms, but we store in ms */
388 card
->ext_csd
.part_time
= 10 * ext_csd
[EXT_CSD_PART_SWITCH_TIME
];
390 /* Sleep / awake timeout in 100ns units */
391 if (sa_shift
> 0 && sa_shift
<= 0x17)
392 card
->ext_csd
.sa_timeout
=
393 1 << ext_csd
[EXT_CSD_S_A_TIMEOUT
];
394 card
->ext_csd
.erase_group_def
=
395 ext_csd
[EXT_CSD_ERASE_GROUP_DEF
];
396 card
->ext_csd
.hc_erase_timeout
= 300 *
397 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
398 card
->ext_csd
.hc_erase_size
=
399 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
] << 10;
401 card
->ext_csd
.rel_sectors
= ext_csd
[EXT_CSD_REL_WR_SEC_C
];
404 * There are two boot regions of equal size, defined in
407 if (ext_csd
[EXT_CSD_BOOT_MULT
] && mmc_boot_partition_access(card
->host
)) {
408 for (idx
= 0; idx
< MMC_NUM_BOOT_PARTITION
; idx
++) {
409 part_size
= ext_csd
[EXT_CSD_BOOT_MULT
] << 17;
410 mmc_part_add(card
, part_size
,
411 EXT_CSD_PART_CONFIG_ACC_BOOT0
+ idx
,
413 MMC_BLK_DATA_AREA_BOOT
);
418 card
->ext_csd
.raw_hc_erase_gap_size
=
419 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
420 card
->ext_csd
.raw_sec_trim_mult
=
421 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
422 card
->ext_csd
.raw_sec_erase_mult
=
423 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
424 card
->ext_csd
.raw_sec_feature_support
=
425 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
426 card
->ext_csd
.raw_trim_mult
=
427 ext_csd
[EXT_CSD_TRIM_MULT
];
428 card
->ext_csd
.raw_partition_support
= ext_csd
[EXT_CSD_PARTITION_SUPPORT
];
429 if (card
->ext_csd
.rev
>= 4) {
430 if (ext_csd
[EXT_CSD_PARTITION_SETTING_COMPLETED
] &
431 EXT_CSD_PART_SETTING_COMPLETED
)
432 card
->ext_csd
.partition_setting_completed
= 1;
434 card
->ext_csd
.partition_setting_completed
= 0;
436 mmc_manage_enhanced_area(card
, ext_csd
);
438 mmc_manage_gp_partitions(card
, ext_csd
);
440 card
->ext_csd
.sec_trim_mult
=
441 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
442 card
->ext_csd
.sec_erase_mult
=
443 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
444 card
->ext_csd
.sec_feature_support
=
445 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
446 card
->ext_csd
.trim_timeout
= 300 *
447 ext_csd
[EXT_CSD_TRIM_MULT
];
450 * Note that the call to mmc_part_add above defaults to read
451 * only. If this default assumption is changed, the call must
452 * take into account the value of boot_locked below.
454 card
->ext_csd
.boot_ro_lock
= ext_csd
[EXT_CSD_BOOT_WP
];
455 card
->ext_csd
.boot_ro_lockable
= true;
457 /* Save power class values */
458 card
->ext_csd
.raw_pwr_cl_52_195
=
459 ext_csd
[EXT_CSD_PWR_CL_52_195
];
460 card
->ext_csd
.raw_pwr_cl_26_195
=
461 ext_csd
[EXT_CSD_PWR_CL_26_195
];
462 card
->ext_csd
.raw_pwr_cl_52_360
=
463 ext_csd
[EXT_CSD_PWR_CL_52_360
];
464 card
->ext_csd
.raw_pwr_cl_26_360
=
465 ext_csd
[EXT_CSD_PWR_CL_26_360
];
466 card
->ext_csd
.raw_pwr_cl_200_195
=
467 ext_csd
[EXT_CSD_PWR_CL_200_195
];
468 card
->ext_csd
.raw_pwr_cl_200_360
=
469 ext_csd
[EXT_CSD_PWR_CL_200_360
];
470 card
->ext_csd
.raw_pwr_cl_ddr_52_195
=
471 ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
];
472 card
->ext_csd
.raw_pwr_cl_ddr_52_360
=
473 ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
];
474 card
->ext_csd
.raw_pwr_cl_ddr_200_360
=
475 ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
];
478 if (card
->ext_csd
.rev
>= 5) {
479 /* Adjust production date as per JEDEC JESD84-B451 */
480 if (card
->cid
.year
< 2010)
481 card
->cid
.year
+= 16;
483 /* check whether the eMMC card supports BKOPS */
484 if (ext_csd
[EXT_CSD_BKOPS_SUPPORT
] & 0x1) {
485 card
->ext_csd
.bkops
= 1;
486 card
->ext_csd
.man_bkops_en
=
487 (ext_csd
[EXT_CSD_BKOPS_EN
] &
488 EXT_CSD_MANUAL_BKOPS_MASK
);
489 card
->ext_csd
.raw_bkops_status
=
490 ext_csd
[EXT_CSD_BKOPS_STATUS
];
491 if (!card
->ext_csd
.man_bkops_en
)
492 pr_info("%s: MAN_BKOPS_EN bit is not set\n",
493 mmc_hostname(card
->host
));
496 /* check whether the eMMC card supports HPI */
497 if (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x1) {
498 card
->ext_csd
.hpi
= 1;
499 if (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x2)
500 card
->ext_csd
.hpi_cmd
= MMC_STOP_TRANSMISSION
;
502 card
->ext_csd
.hpi_cmd
= MMC_SEND_STATUS
;
504 * Indicate the maximum timeout to close
505 * a command interrupted by HPI
507 card
->ext_csd
.out_of_int_time
=
508 ext_csd
[EXT_CSD_OUT_OF_INTERRUPT_TIME
] * 10;
511 card
->ext_csd
.rel_param
= ext_csd
[EXT_CSD_WR_REL_PARAM
];
512 card
->ext_csd
.rst_n_function
= ext_csd
[EXT_CSD_RST_N_FUNCTION
];
515 * RPMB regions are defined in multiples of 128K.
517 card
->ext_csd
.raw_rpmb_size_mult
= ext_csd
[EXT_CSD_RPMB_MULT
];
518 if (ext_csd
[EXT_CSD_RPMB_MULT
] && mmc_host_cmd23(card
->host
)) {
519 mmc_part_add(card
, ext_csd
[EXT_CSD_RPMB_MULT
] << 17,
520 EXT_CSD_PART_CONFIG_ACC_RPMB
,
522 MMC_BLK_DATA_AREA_RPMB
);
526 card
->ext_csd
.raw_erased_mem_count
= ext_csd
[EXT_CSD_ERASED_MEM_CONT
];
527 if (ext_csd
[EXT_CSD_ERASED_MEM_CONT
])
528 card
->erased_byte
= 0xFF;
530 card
->erased_byte
= 0x0;
532 /* eMMC v4.5 or later */
533 if (card
->ext_csd
.rev
>= 6) {
534 card
->ext_csd
.feature_support
|= MMC_DISCARD_FEATURE
;
536 card
->ext_csd
.generic_cmd6_time
= 10 *
537 ext_csd
[EXT_CSD_GENERIC_CMD6_TIME
];
538 card
->ext_csd
.power_off_longtime
= 10 *
539 ext_csd
[EXT_CSD_POWER_OFF_LONG_TIME
];
541 card
->ext_csd
.cache_size
=
542 ext_csd
[EXT_CSD_CACHE_SIZE
+ 0] << 0 |
543 ext_csd
[EXT_CSD_CACHE_SIZE
+ 1] << 8 |
544 ext_csd
[EXT_CSD_CACHE_SIZE
+ 2] << 16 |
545 ext_csd
[EXT_CSD_CACHE_SIZE
+ 3] << 24;
547 if (ext_csd
[EXT_CSD_DATA_SECTOR_SIZE
] == 1)
548 card
->ext_csd
.data_sector_size
= 4096;
550 card
->ext_csd
.data_sector_size
= 512;
552 if ((ext_csd
[EXT_CSD_DATA_TAG_SUPPORT
] & 1) &&
553 (ext_csd
[EXT_CSD_TAG_UNIT_SIZE
] <= 8)) {
554 card
->ext_csd
.data_tag_unit_size
=
555 ((unsigned int) 1 << ext_csd
[EXT_CSD_TAG_UNIT_SIZE
]) *
556 (card
->ext_csd
.data_sector_size
);
558 card
->ext_csd
.data_tag_unit_size
= 0;
561 card
->ext_csd
.max_packed_writes
=
562 ext_csd
[EXT_CSD_MAX_PACKED_WRITES
];
563 card
->ext_csd
.max_packed_reads
=
564 ext_csd
[EXT_CSD_MAX_PACKED_READS
];
566 card
->ext_csd
.data_sector_size
= 512;
569 /* eMMC v5 or later */
570 if (card
->ext_csd
.rev
>= 7) {
571 memcpy(card
->ext_csd
.fwrev
, &ext_csd
[EXT_CSD_FIRMWARE_VERSION
],
573 card
->ext_csd
.ffu_capable
=
574 (ext_csd
[EXT_CSD_SUPPORTED_MODE
] & 0x1) &&
575 !(ext_csd
[EXT_CSD_FW_CONFIG
] & 0x1);
581 static int mmc_read_ext_csd(struct mmc_card
*card
)
586 if (!mmc_can_ext_csd(card
))
589 err
= mmc_get_ext_csd(card
, &ext_csd
);
591 /* If the host or the card can't do the switch,
592 * fail more gracefully. */
599 * High capacity cards should have this "magic" size
600 * stored in their CSD.
602 if (card
->csd
.capacity
== (4096 * 512)) {
603 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
604 mmc_hostname(card
->host
));
606 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
607 mmc_hostname(card
->host
));
614 err
= mmc_decode_ext_csd(card
, ext_csd
);
619 static int mmc_compare_ext_csds(struct mmc_card
*card
, unsigned bus_width
)
624 if (bus_width
== MMC_BUS_WIDTH_1
)
627 err
= mmc_get_ext_csd(card
, &bw_ext_csd
);
631 /* only compare read only fields */
632 err
= !((card
->ext_csd
.raw_partition_support
==
633 bw_ext_csd
[EXT_CSD_PARTITION_SUPPORT
]) &&
634 (card
->ext_csd
.raw_erased_mem_count
==
635 bw_ext_csd
[EXT_CSD_ERASED_MEM_CONT
]) &&
636 (card
->ext_csd
.rev
==
637 bw_ext_csd
[EXT_CSD_REV
]) &&
638 (card
->ext_csd
.raw_ext_csd_structure
==
639 bw_ext_csd
[EXT_CSD_STRUCTURE
]) &&
640 (card
->ext_csd
.raw_card_type
==
641 bw_ext_csd
[EXT_CSD_CARD_TYPE
]) &&
642 (card
->ext_csd
.raw_s_a_timeout
==
643 bw_ext_csd
[EXT_CSD_S_A_TIMEOUT
]) &&
644 (card
->ext_csd
.raw_hc_erase_gap_size
==
645 bw_ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
]) &&
646 (card
->ext_csd
.raw_erase_timeout_mult
==
647 bw_ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
]) &&
648 (card
->ext_csd
.raw_hc_erase_grp_size
==
649 bw_ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
]) &&
650 (card
->ext_csd
.raw_sec_trim_mult
==
651 bw_ext_csd
[EXT_CSD_SEC_TRIM_MULT
]) &&
652 (card
->ext_csd
.raw_sec_erase_mult
==
653 bw_ext_csd
[EXT_CSD_SEC_ERASE_MULT
]) &&
654 (card
->ext_csd
.raw_sec_feature_support
==
655 bw_ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
]) &&
656 (card
->ext_csd
.raw_trim_mult
==
657 bw_ext_csd
[EXT_CSD_TRIM_MULT
]) &&
658 (card
->ext_csd
.raw_sectors
[0] ==
659 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 0]) &&
660 (card
->ext_csd
.raw_sectors
[1] ==
661 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 1]) &&
662 (card
->ext_csd
.raw_sectors
[2] ==
663 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 2]) &&
664 (card
->ext_csd
.raw_sectors
[3] ==
665 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 3]) &&
666 (card
->ext_csd
.raw_pwr_cl_52_195
==
667 bw_ext_csd
[EXT_CSD_PWR_CL_52_195
]) &&
668 (card
->ext_csd
.raw_pwr_cl_26_195
==
669 bw_ext_csd
[EXT_CSD_PWR_CL_26_195
]) &&
670 (card
->ext_csd
.raw_pwr_cl_52_360
==
671 bw_ext_csd
[EXT_CSD_PWR_CL_52_360
]) &&
672 (card
->ext_csd
.raw_pwr_cl_26_360
==
673 bw_ext_csd
[EXT_CSD_PWR_CL_26_360
]) &&
674 (card
->ext_csd
.raw_pwr_cl_200_195
==
675 bw_ext_csd
[EXT_CSD_PWR_CL_200_195
]) &&
676 (card
->ext_csd
.raw_pwr_cl_200_360
==
677 bw_ext_csd
[EXT_CSD_PWR_CL_200_360
]) &&
678 (card
->ext_csd
.raw_pwr_cl_ddr_52_195
==
679 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
]) &&
680 (card
->ext_csd
.raw_pwr_cl_ddr_52_360
==
681 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
]) &&
682 (card
->ext_csd
.raw_pwr_cl_ddr_200_360
==
683 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
]));
692 MMC_DEV_ATTR(cid
, "%08x%08x%08x%08x\n", card
->raw_cid
[0], card
->raw_cid
[1],
693 card
->raw_cid
[2], card
->raw_cid
[3]);
694 MMC_DEV_ATTR(csd
, "%08x%08x%08x%08x\n", card
->raw_csd
[0], card
->raw_csd
[1],
695 card
->raw_csd
[2], card
->raw_csd
[3]);
696 MMC_DEV_ATTR(date
, "%02d/%04d\n", card
->cid
.month
, card
->cid
.year
);
697 MMC_DEV_ATTR(erase_size
, "%u\n", card
->erase_size
<< 9);
698 MMC_DEV_ATTR(preferred_erase_size
, "%u\n", card
->pref_erase
<< 9);
699 MMC_DEV_ATTR(ffu_capable
, "%d\n", card
->ext_csd
.ffu_capable
);
700 MMC_DEV_ATTR(hwrev
, "0x%x\n", card
->cid
.hwrev
);
701 MMC_DEV_ATTR(manfid
, "0x%06x\n", card
->cid
.manfid
);
702 MMC_DEV_ATTR(name
, "%s\n", card
->cid
.prod_name
);
703 MMC_DEV_ATTR(oemid
, "0x%04x\n", card
->cid
.oemid
);
704 MMC_DEV_ATTR(prv
, "0x%x\n", card
->cid
.prv
);
705 MMC_DEV_ATTR(serial
, "0x%08x\n", card
->cid
.serial
);
706 MMC_DEV_ATTR(enhanced_area_offset
, "%llu\n",
707 card
->ext_csd
.enhanced_area_offset
);
708 MMC_DEV_ATTR(enhanced_area_size
, "%u\n", card
->ext_csd
.enhanced_area_size
);
709 MMC_DEV_ATTR(raw_rpmb_size_mult
, "%#x\n", card
->ext_csd
.raw_rpmb_size_mult
);
710 MMC_DEV_ATTR(rel_sectors
, "%#x\n", card
->ext_csd
.rel_sectors
);
712 static ssize_t
mmc_fwrev_show(struct device
*dev
,
713 struct device_attribute
*attr
,
716 struct mmc_card
*card
= mmc_dev_to_card(dev
);
718 if (card
->ext_csd
.rev
< 7) {
719 return sprintf(buf
, "0x%x\n", card
->cid
.fwrev
);
721 return sprintf(buf
, "0x%*phN\n", MMC_FIRMWARE_LEN
,
722 card
->ext_csd
.fwrev
);
726 static DEVICE_ATTR(fwrev
, S_IRUGO
, mmc_fwrev_show
, NULL
);
728 static struct attribute
*mmc_std_attrs
[] = {
732 &dev_attr_erase_size
.attr
,
733 &dev_attr_preferred_erase_size
.attr
,
734 &dev_attr_fwrev
.attr
,
735 &dev_attr_ffu_capable
.attr
,
736 &dev_attr_hwrev
.attr
,
737 &dev_attr_manfid
.attr
,
739 &dev_attr_oemid
.attr
,
741 &dev_attr_serial
.attr
,
742 &dev_attr_enhanced_area_offset
.attr
,
743 &dev_attr_enhanced_area_size
.attr
,
744 &dev_attr_raw_rpmb_size_mult
.attr
,
745 &dev_attr_rel_sectors
.attr
,
748 ATTRIBUTE_GROUPS(mmc_std
);
750 static struct device_type mmc_type
= {
751 .groups
= mmc_std_groups
,
755 * Select the PowerClass for the current bus width
756 * If power class is defined for 4/8 bit bus in the
757 * extended CSD register, select it by executing the
758 * mmc_switch command.
760 static int __mmc_select_powerclass(struct mmc_card
*card
,
761 unsigned int bus_width
)
763 struct mmc_host
*host
= card
->host
;
764 struct mmc_ext_csd
*ext_csd
= &card
->ext_csd
;
765 unsigned int pwrclass_val
= 0;
768 switch (1 << host
->ios
.vdd
) {
769 case MMC_VDD_165_195
:
770 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
771 pwrclass_val
= ext_csd
->raw_pwr_cl_26_195
;
772 else if (host
->ios
.clock
<= MMC_HIGH_52_MAX_DTR
)
773 pwrclass_val
= (bus_width
<= EXT_CSD_BUS_WIDTH_8
) ?
774 ext_csd
->raw_pwr_cl_52_195
:
775 ext_csd
->raw_pwr_cl_ddr_52_195
;
776 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
777 pwrclass_val
= ext_csd
->raw_pwr_cl_200_195
;
788 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
789 pwrclass_val
= ext_csd
->raw_pwr_cl_26_360
;
790 else if (host
->ios
.clock
<= MMC_HIGH_52_MAX_DTR
)
791 pwrclass_val
= (bus_width
<= EXT_CSD_BUS_WIDTH_8
) ?
792 ext_csd
->raw_pwr_cl_52_360
:
793 ext_csd
->raw_pwr_cl_ddr_52_360
;
794 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
795 pwrclass_val
= (bus_width
== EXT_CSD_DDR_BUS_WIDTH_8
) ?
796 ext_csd
->raw_pwr_cl_ddr_200_360
:
797 ext_csd
->raw_pwr_cl_200_360
;
800 pr_warn("%s: Voltage range not supported for power class\n",
805 if (bus_width
& (EXT_CSD_BUS_WIDTH_8
| EXT_CSD_DDR_BUS_WIDTH_8
))
806 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_8BIT_MASK
) >>
807 EXT_CSD_PWR_CL_8BIT_SHIFT
;
809 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_4BIT_MASK
) >>
810 EXT_CSD_PWR_CL_4BIT_SHIFT
;
812 /* If the power class is different from the default value */
813 if (pwrclass_val
> 0) {
814 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
817 card
->ext_csd
.generic_cmd6_time
);
823 static int mmc_select_powerclass(struct mmc_card
*card
)
825 struct mmc_host
*host
= card
->host
;
826 u32 bus_width
, ext_csd_bits
;
829 /* Power class selection is supported for versions >= 4.0 */
830 if (!mmc_can_ext_csd(card
))
833 bus_width
= host
->ios
.bus_width
;
834 /* Power class values are defined only for 4/8 bit bus */
835 if (bus_width
== MMC_BUS_WIDTH_1
)
838 ddr
= card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
;
840 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
841 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
843 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
844 EXT_CSD_BUS_WIDTH_8
: EXT_CSD_BUS_WIDTH_4
;
846 err
= __mmc_select_powerclass(card
, ext_csd_bits
);
848 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
849 mmc_hostname(host
), 1 << bus_width
, ddr
);
855 * Set the bus speed for the selected speed mode.
857 static void mmc_set_bus_speed(struct mmc_card
*card
)
859 unsigned int max_dtr
= (unsigned int)-1;
861 if ((mmc_card_hs200(card
) || mmc_card_hs400(card
)) &&
862 max_dtr
> card
->ext_csd
.hs200_max_dtr
)
863 max_dtr
= card
->ext_csd
.hs200_max_dtr
;
864 else if (mmc_card_hs(card
) && max_dtr
> card
->ext_csd
.hs_max_dtr
)
865 max_dtr
= card
->ext_csd
.hs_max_dtr
;
866 else if (max_dtr
> card
->csd
.max_dtr
)
867 max_dtr
= card
->csd
.max_dtr
;
869 mmc_set_clock(card
->host
, max_dtr
);
873 * Select the bus width amoung 4-bit and 8-bit(SDR).
874 * If the bus width is changed successfully, return the selected width value.
875 * Zero is returned instead of error value if the wide width is not supported.
877 static int mmc_select_bus_width(struct mmc_card
*card
)
879 static unsigned ext_csd_bits
[] = {
883 static unsigned bus_widths
[] = {
887 struct mmc_host
*host
= card
->host
;
888 unsigned idx
, bus_width
= 0;
891 if (!mmc_can_ext_csd(card
) ||
892 !(host
->caps
& (MMC_CAP_4_BIT_DATA
| MMC_CAP_8_BIT_DATA
)))
895 idx
= (host
->caps
& MMC_CAP_8_BIT_DATA
) ? 0 : 1;
898 * Unlike SD, MMC cards dont have a configuration register to notify
899 * supported bus width. So bus test command should be run to identify
900 * the supported bus width or compare the ext csd values of current
901 * bus width and ext csd values of 1 bit mode read earlier.
903 for (; idx
< ARRAY_SIZE(bus_widths
); idx
++) {
905 * Host is capable of 8bit transfer, then switch
906 * the device to work in 8bit transfer mode. If the
907 * mmc switch command returns error then switch to
908 * 4bit transfer mode. On success set the corresponding
909 * bus width on the host.
911 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
914 card
->ext_csd
.generic_cmd6_time
);
918 bus_width
= bus_widths
[idx
];
919 mmc_set_bus_width(host
, bus_width
);
922 * If controller can't handle bus width test,
923 * compare ext_csd previously read in 1 bit mode
924 * against ext_csd at new bus width
926 if (!(host
->caps
& MMC_CAP_BUS_WIDTH_TEST
))
927 err
= mmc_compare_ext_csds(card
, bus_width
);
929 err
= mmc_bus_test(card
, bus_width
);
935 pr_warn("%s: switch to bus width %d failed\n",
936 mmc_hostname(host
), ext_csd_bits
[idx
]);
944 * Switch to the high-speed mode
946 static int mmc_select_hs(struct mmc_card
*card
)
950 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
951 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS
,
952 card
->ext_csd
.generic_cmd6_time
,
955 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
961 * Activate wide bus and DDR if supported.
963 static int mmc_select_hs_ddr(struct mmc_card
*card
)
965 struct mmc_host
*host
= card
->host
;
966 u32 bus_width
, ext_csd_bits
;
969 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
))
972 bus_width
= host
->ios
.bus_width
;
973 if (bus_width
== MMC_BUS_WIDTH_1
)
976 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
977 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
979 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
982 card
->ext_csd
.generic_cmd6_time
);
984 pr_err("%s: switch to bus width %d ddr failed\n",
985 mmc_hostname(host
), 1 << bus_width
);
990 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
993 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
995 * 1.8V vccq at 3.3V core voltage (vcc) is not required
996 * in the JEDEC spec for DDR.
998 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
999 * host controller can support this, like some of the SDHCI
1000 * controller which connect to an eMMC device. Some of these
1001 * host controller still needs to use 1.8v vccq for supporting
1004 * So the sequence will be:
1005 * if (host and device can both support 1.2v IO)
1007 * else if (host and device can both support 1.8v IO)
1009 * so if host and device can only support 3.3v IO, this is the
1012 * WARNING: eMMC rules are NOT the same as SD DDR
1015 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
)
1016 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1018 if (err
&& (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
))
1019 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1021 /* make sure vccq is 3.3v after switching disaster */
1023 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_330
);
1026 mmc_set_timing(host
, MMC_TIMING_MMC_DDR52
);
1031 static int mmc_select_hs400(struct mmc_card
*card
)
1033 struct mmc_host
*host
= card
->host
;
1037 * HS400 mode requires 8-bit bus width
1039 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1040 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
))
1044 * Before switching to dual data rate operation for HS400,
1045 * it is required to convert from HS200 mode to HS mode.
1047 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
1048 mmc_set_bus_speed(card
);
1050 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1051 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS
,
1052 card
->ext_csd
.generic_cmd6_time
,
1055 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1056 mmc_hostname(host
), err
);
1060 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1062 EXT_CSD_DDR_BUS_WIDTH_8
,
1063 card
->ext_csd
.generic_cmd6_time
);
1065 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1066 mmc_hostname(host
), err
);
1070 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1071 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS400
,
1072 card
->ext_csd
.generic_cmd6_time
,
1075 pr_err("%s: switch to hs400 failed, err:%d\n",
1076 mmc_hostname(host
), err
);
1080 mmc_set_timing(host
, MMC_TIMING_MMC_HS400
);
1081 mmc_set_bus_speed(card
);
1087 * For device supporting HS200 mode, the following sequence
1088 * should be done before executing the tuning process.
1089 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1090 * 2. switch to HS200 mode
1091 * 3. set the clock to > 52Mhz and <=200MHz
1093 static int mmc_select_hs200(struct mmc_card
*card
)
1095 struct mmc_host
*host
= card
->host
;
1098 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
)
1099 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1101 if (err
&& card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
)
1102 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1104 /* If fails try again during next card power cycle */
1109 * Set the bus width(4 or 8) with host's support and
1110 * switch to HS200 mode if bus width is set successfully.
1112 err
= mmc_select_bus_width(card
);
1113 if (!IS_ERR_VALUE(err
)) {
1114 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1115 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS200
,
1116 card
->ext_csd
.generic_cmd6_time
,
1119 mmc_set_timing(host
, MMC_TIMING_MMC_HS200
);
1126 * Activate High Speed or HS200 mode if supported.
1128 static int mmc_select_timing(struct mmc_card
*card
)
1132 if (!mmc_can_ext_csd(card
))
1135 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200
)
1136 err
= mmc_select_hs200(card
);
1137 else if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS
)
1138 err
= mmc_select_hs(card
);
1140 if (err
&& err
!= -EBADMSG
)
1144 pr_warn("%s: switch to %s failed\n",
1145 mmc_card_hs(card
) ? "high-speed" :
1146 (mmc_card_hs200(card
) ? "hs200" : ""),
1147 mmc_hostname(card
->host
));
1153 * Set the bus speed to the selected bus timing.
1154 * If timing is not selected, backward compatible is the default.
1156 mmc_set_bus_speed(card
);
1161 * Execute tuning sequence to seek the proper bus operating
1162 * conditions for HS200 and HS400, which sends CMD21 to the device.
1164 static int mmc_hs200_tuning(struct mmc_card
*card
)
1166 struct mmc_host
*host
= card
->host
;
1169 * Timing should be adjusted to the HS400 target
1170 * operation frequency for tuning process
1172 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1173 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
)
1174 if (host
->ops
->prepare_hs400_tuning
)
1175 host
->ops
->prepare_hs400_tuning(host
, &host
->ios
);
1177 return mmc_execute_tuning(card
);
1181 * Handle the detection and initialisation of a card.
1183 * In the case of a resume, "oldcard" will contain the card
1184 * we're trying to reinitialise.
1186 static int mmc_init_card(struct mmc_host
*host
, u32 ocr
,
1187 struct mmc_card
*oldcard
)
1189 struct mmc_card
*card
;
1195 WARN_ON(!host
->claimed
);
1197 /* Set correct bus mode for MMC before attempting init */
1198 if (!mmc_host_is_spi(host
))
1199 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
1202 * Since we're changing the OCR value, we seem to
1203 * need to tell some cards to go back to the idle
1204 * state. We wait 1ms to give cards time to
1206 * mmc_go_idle is needed for eMMC that are asleep
1210 /* The extra bit indicates that we support high capacity */
1211 err
= mmc_send_op_cond(host
, ocr
| (1 << 30), &rocr
);
1216 * For SPI, enable CRC as appropriate.
1218 if (mmc_host_is_spi(host
)) {
1219 err
= mmc_spi_set_crc(host
, use_spi_crc
);
1225 * Fetch CID from card.
1227 if (mmc_host_is_spi(host
))
1228 err
= mmc_send_cid(host
, cid
);
1230 err
= mmc_all_send_cid(host
, cid
);
1235 if (memcmp(cid
, oldcard
->raw_cid
, sizeof(cid
)) != 0) {
1243 * Allocate card structure.
1245 card
= mmc_alloc_card(host
, &mmc_type
);
1247 err
= PTR_ERR(card
);
1252 card
->type
= MMC_TYPE_MMC
;
1254 memcpy(card
->raw_cid
, cid
, sizeof(card
->raw_cid
));
1258 * Call the optional HC's init_card function to handle quirks.
1260 if (host
->ops
->init_card
)
1261 host
->ops
->init_card(host
, card
);
1264 * For native busses: set card RCA and quit open drain mode.
1266 if (!mmc_host_is_spi(host
)) {
1267 err
= mmc_set_relative_addr(card
);
1271 mmc_set_bus_mode(host
, MMC_BUSMODE_PUSHPULL
);
1276 * Fetch CSD from card.
1278 err
= mmc_send_csd(card
, card
->raw_csd
);
1282 err
= mmc_decode_csd(card
);
1285 err
= mmc_decode_cid(card
);
1291 * handling only for cards supporting DSR and hosts requesting
1294 if (card
->csd
.dsr_imp
&& host
->dsr_req
)
1298 * Select card, as all following commands rely on that.
1300 if (!mmc_host_is_spi(host
)) {
1301 err
= mmc_select_card(card
);
1307 /* Read extended CSD. */
1308 err
= mmc_read_ext_csd(card
);
1312 /* If doing byte addressing, check if required to do sector
1313 * addressing. Handle the case of <2GB cards needing sector
1314 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1315 * ocr register has bit 30 set for sector addressing.
1317 if (!(mmc_card_blockaddr(card
)) && (rocr
& (1<<30)))
1318 mmc_card_set_blockaddr(card
);
1320 /* Erase size depends on CSD and Extended CSD */
1321 mmc_set_erase_size(card
);
1325 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1326 * bit. This bit will be lost every time after a reset or power off.
1328 if (card
->ext_csd
.partition_setting_completed
||
1329 (card
->ext_csd
.rev
>= 3 && (host
->caps2
& MMC_CAP2_HC_ERASE_SZ
))) {
1330 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1331 EXT_CSD_ERASE_GROUP_DEF
, 1,
1332 card
->ext_csd
.generic_cmd6_time
);
1334 if (err
&& err
!= -EBADMSG
)
1340 * Just disable enhanced area off & sz
1341 * will try to enable ERASE_GROUP_DEF
1342 * during next time reinit
1344 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
1345 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
1347 card
->ext_csd
.erase_group_def
= 1;
1349 * enable ERASE_GRP_DEF successfully.
1350 * This will affect the erase size, so
1351 * here need to reset erase size
1353 mmc_set_erase_size(card
);
1358 * Ensure eMMC user default partition is enabled
1360 if (card
->ext_csd
.part_config
& EXT_CSD_PART_CONFIG_ACC_MASK
) {
1361 card
->ext_csd
.part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
1362 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_PART_CONFIG
,
1363 card
->ext_csd
.part_config
,
1364 card
->ext_csd
.part_time
);
1365 if (err
&& err
!= -EBADMSG
)
1370 * Enable power_off_notification byte in the ext_csd register
1372 if (card
->ext_csd
.rev
>= 6) {
1373 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1374 EXT_CSD_POWER_OFF_NOTIFICATION
,
1376 card
->ext_csd
.generic_cmd6_time
);
1377 if (err
&& err
!= -EBADMSG
)
1381 * The err can be -EBADMSG or 0,
1382 * so check for success and update the flag
1385 card
->ext_csd
.power_off_notification
= EXT_CSD_POWER_ON
;
1389 * Select timing interface
1391 err
= mmc_select_timing(card
);
1395 if (mmc_card_hs200(card
)) {
1396 err
= mmc_hs200_tuning(card
);
1400 err
= mmc_select_hs400(card
);
1403 } else if (mmc_card_hs(card
)) {
1404 /* Select the desired bus width optionally */
1405 err
= mmc_select_bus_width(card
);
1406 if (!IS_ERR_VALUE(err
)) {
1407 err
= mmc_select_hs_ddr(card
);
1414 * Choose the power class with selected bus interface
1416 mmc_select_powerclass(card
);
1419 * Enable HPI feature (if supported)
1421 if (card
->ext_csd
.hpi
) {
1422 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1423 EXT_CSD_HPI_MGMT
, 1,
1424 card
->ext_csd
.generic_cmd6_time
);
1425 if (err
&& err
!= -EBADMSG
)
1428 pr_warn("%s: Enabling HPI failed\n",
1429 mmc_hostname(card
->host
));
1432 card
->ext_csd
.hpi_en
= 1;
1436 * If cache size is higher than 0, this indicates
1437 * the existence of cache and it can be turned on.
1439 if (card
->ext_csd
.cache_size
> 0) {
1440 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1441 EXT_CSD_CACHE_CTRL
, 1,
1442 card
->ext_csd
.generic_cmd6_time
);
1443 if (err
&& err
!= -EBADMSG
)
1447 * Only if no error, cache is turned on successfully.
1450 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1451 mmc_hostname(card
->host
), err
);
1452 card
->ext_csd
.cache_ctrl
= 0;
1455 card
->ext_csd
.cache_ctrl
= 1;
1460 * The mandatory minimum values are defined for packed command.
1463 if (card
->ext_csd
.max_packed_writes
>= 3 &&
1464 card
->ext_csd
.max_packed_reads
>= 5 &&
1465 host
->caps2
& MMC_CAP2_PACKED_CMD
) {
1466 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1467 EXT_CSD_EXP_EVENTS_CTRL
,
1468 EXT_CSD_PACKED_EVENT_EN
,
1469 card
->ext_csd
.generic_cmd6_time
);
1470 if (err
&& err
!= -EBADMSG
)
1473 pr_warn("%s: Enabling packed event failed\n",
1474 mmc_hostname(card
->host
));
1475 card
->ext_csd
.packed_event_en
= 0;
1478 card
->ext_csd
.packed_event_en
= 1;
1489 mmc_remove_card(card
);
1494 static int mmc_can_sleep(struct mmc_card
*card
)
1496 return (card
&& card
->ext_csd
.rev
>= 3);
1499 static int mmc_sleep(struct mmc_host
*host
)
1501 struct mmc_command cmd
= {0};
1502 struct mmc_card
*card
= host
->card
;
1503 unsigned int timeout_ms
= DIV_ROUND_UP(card
->ext_csd
.sa_timeout
, 10000);
1506 err
= mmc_deselect_cards(host
);
1510 cmd
.opcode
= MMC_SLEEP_AWAKE
;
1511 cmd
.arg
= card
->rca
<< 16;
1515 * If the max_busy_timeout of the host is specified, validate it against
1516 * the sleep cmd timeout. A failure means we need to prevent the host
1517 * from doing hw busy detection, which is done by converting to a R1
1518 * response instead of a R1B.
1520 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
)) {
1521 cmd
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1523 cmd
.flags
= MMC_RSP_R1B
| MMC_CMD_AC
;
1524 cmd
.busy_timeout
= timeout_ms
;
1527 err
= mmc_wait_for_cmd(host
, &cmd
, 0);
1532 * If the host does not wait while the card signals busy, then we will
1533 * will have to wait the sleep/awake timeout. Note, we cannot use the
1534 * SEND_STATUS command to poll the status because that command (and most
1535 * others) is invalid while the card sleeps.
1537 if (!cmd
.busy_timeout
|| !(host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
))
1538 mmc_delay(timeout_ms
);
1543 static int mmc_can_poweroff_notify(const struct mmc_card
*card
)
1546 mmc_card_mmc(card
) &&
1547 (card
->ext_csd
.power_off_notification
== EXT_CSD_POWER_ON
);
1550 static int mmc_poweroff_notify(struct mmc_card
*card
, unsigned int notify_type
)
1552 unsigned int timeout
= card
->ext_csd
.generic_cmd6_time
;
1555 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1556 if (notify_type
== EXT_CSD_POWER_OFF_LONG
)
1557 timeout
= card
->ext_csd
.power_off_longtime
;
1559 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1560 EXT_CSD_POWER_OFF_NOTIFICATION
,
1561 notify_type
, timeout
, true, false, false);
1563 pr_err("%s: Power Off Notification timed out, %u\n",
1564 mmc_hostname(card
->host
), timeout
);
1566 /* Disable the power off notification after the switch operation. */
1567 card
->ext_csd
.power_off_notification
= EXT_CSD_NO_POWER_NOTIFICATION
;
1573 * Host is being removed. Free up the current card.
1575 static void mmc_remove(struct mmc_host
*host
)
1578 BUG_ON(!host
->card
);
1580 mmc_remove_card(host
->card
);
1585 * Card detection - card is alive.
1587 static int mmc_alive(struct mmc_host
*host
)
1589 return mmc_send_status(host
->card
, NULL
);
1593 * Card detection callback from host.
1595 static void mmc_detect(struct mmc_host
*host
)
1600 BUG_ON(!host
->card
);
1602 mmc_get_card(host
->card
);
1605 * Just check if our card has been removed.
1607 err
= _mmc_detect_card_removed(host
);
1609 mmc_put_card(host
->card
);
1614 mmc_claim_host(host
);
1615 mmc_detach_bus(host
);
1616 mmc_power_off(host
);
1617 mmc_release_host(host
);
1621 static int _mmc_suspend(struct mmc_host
*host
, bool is_suspend
)
1624 unsigned int notify_type
= is_suspend
? EXT_CSD_POWER_OFF_SHORT
:
1625 EXT_CSD_POWER_OFF_LONG
;
1628 BUG_ON(!host
->card
);
1630 mmc_claim_host(host
);
1632 if (mmc_card_suspended(host
->card
))
1635 if (mmc_card_doing_bkops(host
->card
)) {
1636 err
= mmc_stop_bkops(host
->card
);
1641 err
= mmc_flush_cache(host
->card
);
1645 if (mmc_can_poweroff_notify(host
->card
) &&
1646 ((host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
) || !is_suspend
))
1647 err
= mmc_poweroff_notify(host
->card
, notify_type
);
1648 else if (mmc_can_sleep(host
->card
))
1649 err
= mmc_sleep(host
);
1650 else if (!mmc_host_is_spi(host
))
1651 err
= mmc_deselect_cards(host
);
1654 mmc_power_off(host
);
1655 mmc_card_set_suspended(host
->card
);
1658 mmc_release_host(host
);
1665 static int mmc_suspend(struct mmc_host
*host
)
1669 err
= _mmc_suspend(host
, true);
1671 pm_runtime_disable(&host
->card
->dev
);
1672 pm_runtime_set_suspended(&host
->card
->dev
);
1679 * This function tries to determine if the same card is still present
1680 * and, if so, restore all state to it.
1682 static int _mmc_resume(struct mmc_host
*host
)
1687 BUG_ON(!host
->card
);
1689 mmc_claim_host(host
);
1691 if (!mmc_card_suspended(host
->card
))
1694 mmc_power_up(host
, host
->card
->ocr
);
1695 err
= mmc_init_card(host
, host
->card
->ocr
, host
->card
);
1696 mmc_card_clr_suspended(host
->card
);
1699 mmc_release_host(host
);
1706 static int mmc_shutdown(struct mmc_host
*host
)
1711 * In a specific case for poweroff notify, we need to resume the card
1712 * before we can shutdown it properly.
1714 if (mmc_can_poweroff_notify(host
->card
) &&
1715 !(host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
))
1716 err
= _mmc_resume(host
);
1719 err
= _mmc_suspend(host
, false);
1725 * Callback for resume.
1727 static int mmc_resume(struct mmc_host
*host
)
1731 if (!(host
->caps
& MMC_CAP_RUNTIME_RESUME
)) {
1732 err
= _mmc_resume(host
);
1733 pm_runtime_set_active(&host
->card
->dev
);
1734 pm_runtime_mark_last_busy(&host
->card
->dev
);
1736 pm_runtime_enable(&host
->card
->dev
);
1742 * Callback for runtime_suspend.
1744 static int mmc_runtime_suspend(struct mmc_host
*host
)
1748 if (!(host
->caps
& MMC_CAP_AGGRESSIVE_PM
))
1751 err
= _mmc_suspend(host
, true);
1753 pr_err("%s: error %d doing aggessive suspend\n",
1754 mmc_hostname(host
), err
);
1760 * Callback for runtime_resume.
1762 static int mmc_runtime_resume(struct mmc_host
*host
)
1766 if (!(host
->caps
& (MMC_CAP_AGGRESSIVE_PM
| MMC_CAP_RUNTIME_RESUME
)))
1769 err
= _mmc_resume(host
);
1771 pr_err("%s: error %d doing aggessive resume\n",
1772 mmc_hostname(host
), err
);
1777 static int mmc_power_restore(struct mmc_host
*host
)
1781 mmc_claim_host(host
);
1782 ret
= mmc_init_card(host
, host
->card
->ocr
, host
->card
);
1783 mmc_release_host(host
);
1788 int mmc_can_reset(struct mmc_card
*card
)
1792 rst_n_function
= card
->ext_csd
.rst_n_function
;
1793 if ((rst_n_function
& EXT_CSD_RST_N_EN_MASK
) != EXT_CSD_RST_N_ENABLED
)
1797 EXPORT_SYMBOL(mmc_can_reset
);
1799 static int mmc_reset(struct mmc_host
*host
)
1801 struct mmc_card
*card
= host
->card
;
1804 if (!(host
->caps
& MMC_CAP_HW_RESET
) || !host
->ops
->hw_reset
)
1807 if (!mmc_can_reset(card
))
1810 mmc_host_clk_hold(host
);
1811 mmc_set_clock(host
, host
->f_init
);
1813 host
->ops
->hw_reset(host
);
1815 /* If the reset has happened, then a status command will fail */
1816 if (!mmc_send_status(card
, &status
)) {
1817 mmc_host_clk_release(host
);
1821 /* Set initial state and call mmc_set_ios */
1822 mmc_set_initial_state(host
);
1823 mmc_host_clk_release(host
);
1825 return mmc_power_restore(host
);
1828 static const struct mmc_bus_ops mmc_ops
= {
1829 .remove
= mmc_remove
,
1830 .detect
= mmc_detect
,
1831 .suspend
= mmc_suspend
,
1832 .resume
= mmc_resume
,
1833 .runtime_suspend
= mmc_runtime_suspend
,
1834 .runtime_resume
= mmc_runtime_resume
,
1835 .power_restore
= mmc_power_restore
,
1837 .shutdown
= mmc_shutdown
,
1842 * Starting point for MMC card init.
1844 int mmc_attach_mmc(struct mmc_host
*host
)
1850 WARN_ON(!host
->claimed
);
1852 /* Set correct bus mode for MMC before attempting attach */
1853 if (!mmc_host_is_spi(host
))
1854 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
1856 err
= mmc_send_op_cond(host
, 0, &ocr
);
1860 mmc_attach_bus(host
, &mmc_ops
);
1861 if (host
->ocr_avail_mmc
)
1862 host
->ocr_avail
= host
->ocr_avail_mmc
;
1865 * We need to get OCR a different way for SPI.
1867 if (mmc_host_is_spi(host
)) {
1868 err
= mmc_spi_read_ocr(host
, 1, &ocr
);
1873 rocr
= mmc_select_voltage(host
, ocr
);
1876 * Can we support the voltage of the card?
1884 * Detect and init the card.
1886 err
= mmc_init_card(host
, rocr
, NULL
);
1890 mmc_release_host(host
);
1891 err
= mmc_add_card(host
->card
);
1892 mmc_claim_host(host
);
1899 mmc_release_host(host
);
1900 mmc_remove_card(host
->card
);
1901 mmc_claim_host(host
);
1904 mmc_detach_bus(host
);
1906 pr_err("%s: error %d whilst initialising MMC card\n",
1907 mmc_hostname(host
), err
);