2 * linux/drivers/mmc/core/mmc.c
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/err.h>
15 #include <linux/slab.h>
16 #include <linux/stat.h>
17 #include <linux/pm_runtime.h>
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/card.h>
21 #include <linux/mmc/mmc.h>
29 static const unsigned int tran_exp
[] = {
30 10000, 100000, 1000000, 10000000,
34 static const unsigned char tran_mant
[] = {
35 0, 10, 12, 13, 15, 20, 25, 30,
36 35, 40, 45, 50, 55, 60, 70, 80,
39 static const unsigned int tacc_exp
[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
43 static const unsigned int tacc_mant
[] = {
44 0, 10, 12, 13, 15, 20, 25, 30,
45 35, 40, 45, 50, 55, 60, 70, 80,
48 #define UNSTUFF_BITS(resp,start,size) \
50 const int __size = size; \
51 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
52 const int __off = 3 - ((start) / 32); \
53 const int __shft = (start) & 31; \
56 __res = resp[__off] >> __shft; \
57 if (__size + __shft > 32) \
58 __res |= resp[__off-1] << ((32 - __shft) % 32); \
63 * Given the decoded CSD structure, decode the raw CID to our CID structure.
65 static int mmc_decode_cid(struct mmc_card
*card
)
67 u32
*resp
= card
->raw_cid
;
70 * The selection of the format here is based upon published
71 * specs from sandisk and from what people have reported.
73 switch (card
->csd
.mmca_vsn
) {
74 case 0: /* MMC v1.0 - v1.2 */
75 case 1: /* MMC v1.4 */
76 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 104, 24);
77 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
78 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
79 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
80 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
81 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
82 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
83 card
->cid
.prod_name
[6] = UNSTUFF_BITS(resp
, 48, 8);
84 card
->cid
.hwrev
= UNSTUFF_BITS(resp
, 44, 4);
85 card
->cid
.fwrev
= UNSTUFF_BITS(resp
, 40, 4);
86 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 24);
87 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
88 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
91 case 2: /* MMC v2.0 - v2.2 */
92 case 3: /* MMC v3.1 - v3.3 */
94 card
->cid
.manfid
= UNSTUFF_BITS(resp
, 120, 8);
95 card
->cid
.oemid
= UNSTUFF_BITS(resp
, 104, 16);
96 card
->cid
.prod_name
[0] = UNSTUFF_BITS(resp
, 96, 8);
97 card
->cid
.prod_name
[1] = UNSTUFF_BITS(resp
, 88, 8);
98 card
->cid
.prod_name
[2] = UNSTUFF_BITS(resp
, 80, 8);
99 card
->cid
.prod_name
[3] = UNSTUFF_BITS(resp
, 72, 8);
100 card
->cid
.prod_name
[4] = UNSTUFF_BITS(resp
, 64, 8);
101 card
->cid
.prod_name
[5] = UNSTUFF_BITS(resp
, 56, 8);
102 card
->cid
.prv
= UNSTUFF_BITS(resp
, 48, 8);
103 card
->cid
.serial
= UNSTUFF_BITS(resp
, 16, 32);
104 card
->cid
.month
= UNSTUFF_BITS(resp
, 12, 4);
105 card
->cid
.year
= UNSTUFF_BITS(resp
, 8, 4) + 1997;
109 pr_err("%s: card has unknown MMCA version %d\n",
110 mmc_hostname(card
->host
), card
->csd
.mmca_vsn
);
117 static void mmc_set_erase_size(struct mmc_card
*card
)
119 if (card
->ext_csd
.erase_group_def
& 1)
120 card
->erase_size
= card
->ext_csd
.hc_erase_size
;
122 card
->erase_size
= card
->csd
.erase_size
;
124 mmc_init_erase(card
);
128 * Given a 128-bit response, decode to our card CSD structure.
130 static int mmc_decode_csd(struct mmc_card
*card
)
132 struct mmc_csd
*csd
= &card
->csd
;
133 unsigned int e
, m
, a
, b
;
134 u32
*resp
= card
->raw_csd
;
137 * We only understand CSD structure v1.1 and v1.2.
138 * v1.2 has extra information in bits 15, 11 and 10.
139 * We also support eMMC v4.4 & v4.41.
141 csd
->structure
= UNSTUFF_BITS(resp
, 126, 2);
142 if (csd
->structure
== 0) {
143 pr_err("%s: unrecognised CSD structure version %d\n",
144 mmc_hostname(card
->host
), csd
->structure
);
148 csd
->mmca_vsn
= UNSTUFF_BITS(resp
, 122, 4);
149 m
= UNSTUFF_BITS(resp
, 115, 4);
150 e
= UNSTUFF_BITS(resp
, 112, 3);
151 csd
->tacc_ns
= (tacc_exp
[e
] * tacc_mant
[m
] + 9) / 10;
152 csd
->tacc_clks
= UNSTUFF_BITS(resp
, 104, 8) * 100;
154 m
= UNSTUFF_BITS(resp
, 99, 4);
155 e
= UNSTUFF_BITS(resp
, 96, 3);
156 csd
->max_dtr
= tran_exp
[e
] * tran_mant
[m
];
157 csd
->cmdclass
= UNSTUFF_BITS(resp
, 84, 12);
159 e
= UNSTUFF_BITS(resp
, 47, 3);
160 m
= UNSTUFF_BITS(resp
, 62, 12);
161 csd
->capacity
= (1 + m
) << (e
+ 2);
163 csd
->read_blkbits
= UNSTUFF_BITS(resp
, 80, 4);
164 csd
->read_partial
= UNSTUFF_BITS(resp
, 79, 1);
165 csd
->write_misalign
= UNSTUFF_BITS(resp
, 78, 1);
166 csd
->read_misalign
= UNSTUFF_BITS(resp
, 77, 1);
167 csd
->dsr_imp
= UNSTUFF_BITS(resp
, 76, 1);
168 csd
->r2w_factor
= UNSTUFF_BITS(resp
, 26, 3);
169 csd
->write_blkbits
= UNSTUFF_BITS(resp
, 22, 4);
170 csd
->write_partial
= UNSTUFF_BITS(resp
, 21, 1);
172 if (csd
->write_blkbits
>= 9) {
173 a
= UNSTUFF_BITS(resp
, 42, 5);
174 b
= UNSTUFF_BITS(resp
, 37, 5);
175 csd
->erase_size
= (a
+ 1) * (b
+ 1);
176 csd
->erase_size
<<= csd
->write_blkbits
- 9;
182 static void mmc_select_card_type(struct mmc_card
*card
)
184 struct mmc_host
*host
= card
->host
;
185 u8 card_type
= card
->ext_csd
.raw_card_type
;
186 u32 caps
= host
->caps
, caps2
= host
->caps2
;
187 unsigned int hs_max_dtr
= 0, hs200_max_dtr
= 0;
188 unsigned int avail_type
= 0;
190 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
191 card_type
& EXT_CSD_CARD_TYPE_HS_26
) {
192 hs_max_dtr
= MMC_HIGH_26_MAX_DTR
;
193 avail_type
|= EXT_CSD_CARD_TYPE_HS_26
;
196 if (caps
& MMC_CAP_MMC_HIGHSPEED
&&
197 card_type
& EXT_CSD_CARD_TYPE_HS_52
) {
198 hs_max_dtr
= MMC_HIGH_52_MAX_DTR
;
199 avail_type
|= EXT_CSD_CARD_TYPE_HS_52
;
202 if (caps
& MMC_CAP_1_8V_DDR
&&
203 card_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
) {
204 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
205 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_8V
;
208 if (caps
& MMC_CAP_1_2V_DDR
&&
209 card_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
) {
210 hs_max_dtr
= MMC_HIGH_DDR_MAX_DTR
;
211 avail_type
|= EXT_CSD_CARD_TYPE_DDR_1_2V
;
214 if (caps2
& MMC_CAP2_HS200_1_8V_SDR
&&
215 card_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
) {
216 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
217 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_8V
;
220 if (caps2
& MMC_CAP2_HS200_1_2V_SDR
&&
221 card_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
) {
222 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
223 avail_type
|= EXT_CSD_CARD_TYPE_HS200_1_2V
;
226 if (caps2
& MMC_CAP2_HS400_1_8V
&&
227 card_type
& EXT_CSD_CARD_TYPE_HS400_1_8V
) {
228 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
229 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_8V
;
232 if (caps2
& MMC_CAP2_HS400_1_2V
&&
233 card_type
& EXT_CSD_CARD_TYPE_HS400_1_2V
) {
234 hs200_max_dtr
= MMC_HS200_MAX_DTR
;
235 avail_type
|= EXT_CSD_CARD_TYPE_HS400_1_2V
;
238 card
->ext_csd
.hs_max_dtr
= hs_max_dtr
;
239 card
->ext_csd
.hs200_max_dtr
= hs200_max_dtr
;
240 card
->mmc_avail_type
= avail_type
;
243 static void mmc_manage_enhanced_area(struct mmc_card
*card
, u8
*ext_csd
)
245 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
248 * Disable these attributes by default
250 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
251 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
254 * Enhanced area feature support -- check whether the eMMC
255 * card has the Enhanced area enabled. If so, export enhanced
256 * area offset and size to user by adding sysfs interface.
258 if ((ext_csd
[EXT_CSD_PARTITION_SUPPORT
] & 0x2) &&
259 (ext_csd
[EXT_CSD_PARTITION_ATTRIBUTE
] & 0x1)) {
260 if (card
->ext_csd
.partition_setting_completed
) {
262 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
264 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
267 * calculate the enhanced data area offset, in bytes
269 card
->ext_csd
.enhanced_area_offset
=
270 (((unsigned long long)ext_csd
[139]) << 24) +
271 (((unsigned long long)ext_csd
[138]) << 16) +
272 (((unsigned long long)ext_csd
[137]) << 8) +
273 (((unsigned long long)ext_csd
[136]));
274 if (mmc_card_blockaddr(card
))
275 card
->ext_csd
.enhanced_area_offset
<<= 9;
277 * calculate the enhanced data area size, in kilobytes
279 card
->ext_csd
.enhanced_area_size
=
280 (ext_csd
[142] << 16) + (ext_csd
[141] << 8) +
282 card
->ext_csd
.enhanced_area_size
*=
283 (size_t)(hc_erase_grp_sz
* hc_wp_grp_sz
);
284 card
->ext_csd
.enhanced_area_size
<<= 9;
286 pr_warn("%s: defines enhanced area without partition setting complete\n",
287 mmc_hostname(card
->host
));
292 static void mmc_manage_gp_partitions(struct mmc_card
*card
, u8
*ext_csd
)
295 u8 hc_erase_grp_sz
, hc_wp_grp_sz
;
296 unsigned int part_size
;
299 * General purpose partition feature support --
300 * If ext_csd has the size of general purpose partitions,
301 * set size, part_cfg, partition name in mmc_part.
303 if (ext_csd
[EXT_CSD_PARTITION_SUPPORT
] &
304 EXT_CSD_PART_SUPPORT_PART_EN
) {
306 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
308 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
310 for (idx
= 0; idx
< MMC_NUM_GP_PARTITION
; idx
++) {
311 if (!ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3] &&
312 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1] &&
313 !ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2])
315 if (card
->ext_csd
.partition_setting_completed
== 0) {
316 pr_warn("%s: has partition size defined without partition complete\n",
317 mmc_hostname(card
->host
));
321 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 2]
323 (ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3 + 1]
325 ext_csd
[EXT_CSD_GP_SIZE_MULT
+ idx
* 3];
326 part_size
*= (size_t)(hc_erase_grp_sz
*
328 mmc_part_add(card
, part_size
<< 19,
329 EXT_CSD_PART_CONFIG_ACC_GP0
+ idx
,
331 MMC_BLK_DATA_AREA_GP
);
336 /* Minimum partition switch timeout in milliseconds */
337 #define MMC_MIN_PART_SWITCH_TIME 300
340 * Decode extended CSD.
342 static int mmc_decode_ext_csd(struct mmc_card
*card
, u8
*ext_csd
)
345 unsigned int part_size
;
346 struct device_node
*np
;
347 bool broken_hpi
= false;
349 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
350 card
->ext_csd
.raw_ext_csd_structure
= ext_csd
[EXT_CSD_STRUCTURE
];
351 if (card
->csd
.structure
== 3) {
352 if (card
->ext_csd
.raw_ext_csd_structure
> 2) {
353 pr_err("%s: unrecognised EXT_CSD structure "
354 "version %d\n", mmc_hostname(card
->host
),
355 card
->ext_csd
.raw_ext_csd_structure
);
361 np
= mmc_of_find_child_device(card
->host
, 0);
362 if (np
&& of_device_is_compatible(np
, "mmc-card"))
363 broken_hpi
= of_property_read_bool(np
, "broken-hpi");
367 * The EXT_CSD format is meant to be forward compatible. As long
368 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
369 * are authorized, see JEDEC JESD84-B50 section B.8.
371 card
->ext_csd
.rev
= ext_csd
[EXT_CSD_REV
];
373 card
->ext_csd
.raw_sectors
[0] = ext_csd
[EXT_CSD_SEC_CNT
+ 0];
374 card
->ext_csd
.raw_sectors
[1] = ext_csd
[EXT_CSD_SEC_CNT
+ 1];
375 card
->ext_csd
.raw_sectors
[2] = ext_csd
[EXT_CSD_SEC_CNT
+ 2];
376 card
->ext_csd
.raw_sectors
[3] = ext_csd
[EXT_CSD_SEC_CNT
+ 3];
377 if (card
->ext_csd
.rev
>= 2) {
378 card
->ext_csd
.sectors
=
379 ext_csd
[EXT_CSD_SEC_CNT
+ 0] << 0 |
380 ext_csd
[EXT_CSD_SEC_CNT
+ 1] << 8 |
381 ext_csd
[EXT_CSD_SEC_CNT
+ 2] << 16 |
382 ext_csd
[EXT_CSD_SEC_CNT
+ 3] << 24;
384 /* Cards with density > 2GiB are sector addressed */
385 if (card
->ext_csd
.sectors
> (2u * 1024 * 1024 * 1024) / 512)
386 mmc_card_set_blockaddr(card
);
389 card
->ext_csd
.raw_card_type
= ext_csd
[EXT_CSD_CARD_TYPE
];
390 mmc_select_card_type(card
);
392 card
->ext_csd
.raw_s_a_timeout
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
393 card
->ext_csd
.raw_erase_timeout_mult
=
394 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
395 card
->ext_csd
.raw_hc_erase_grp_size
=
396 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
];
397 if (card
->ext_csd
.rev
>= 3) {
398 u8 sa_shift
= ext_csd
[EXT_CSD_S_A_TIMEOUT
];
399 card
->ext_csd
.part_config
= ext_csd
[EXT_CSD_PART_CONFIG
];
401 /* EXT_CSD value is in units of 10ms, but we store in ms */
402 card
->ext_csd
.part_time
= 10 * ext_csd
[EXT_CSD_PART_SWITCH_TIME
];
403 /* Some eMMC set the value too low so set a minimum */
404 if (card
->ext_csd
.part_time
&&
405 card
->ext_csd
.part_time
< MMC_MIN_PART_SWITCH_TIME
)
406 card
->ext_csd
.part_time
= MMC_MIN_PART_SWITCH_TIME
;
408 /* Sleep / awake timeout in 100ns units */
409 if (sa_shift
> 0 && sa_shift
<= 0x17)
410 card
->ext_csd
.sa_timeout
=
411 1 << ext_csd
[EXT_CSD_S_A_TIMEOUT
];
412 card
->ext_csd
.erase_group_def
=
413 ext_csd
[EXT_CSD_ERASE_GROUP_DEF
];
414 card
->ext_csd
.hc_erase_timeout
= 300 *
415 ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
];
416 card
->ext_csd
.hc_erase_size
=
417 ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
] << 10;
419 card
->ext_csd
.rel_sectors
= ext_csd
[EXT_CSD_REL_WR_SEC_C
];
422 * There are two boot regions of equal size, defined in
425 if (ext_csd
[EXT_CSD_BOOT_MULT
] && mmc_boot_partition_access(card
->host
)) {
426 for (idx
= 0; idx
< MMC_NUM_BOOT_PARTITION
; idx
++) {
427 part_size
= ext_csd
[EXT_CSD_BOOT_MULT
] << 17;
428 mmc_part_add(card
, part_size
,
429 EXT_CSD_PART_CONFIG_ACC_BOOT0
+ idx
,
431 MMC_BLK_DATA_AREA_BOOT
);
436 card
->ext_csd
.raw_hc_erase_gap_size
=
437 ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
];
438 card
->ext_csd
.raw_sec_trim_mult
=
439 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
440 card
->ext_csd
.raw_sec_erase_mult
=
441 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
442 card
->ext_csd
.raw_sec_feature_support
=
443 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
444 card
->ext_csd
.raw_trim_mult
=
445 ext_csd
[EXT_CSD_TRIM_MULT
];
446 card
->ext_csd
.raw_partition_support
= ext_csd
[EXT_CSD_PARTITION_SUPPORT
];
447 card
->ext_csd
.raw_driver_strength
= ext_csd
[EXT_CSD_DRIVER_STRENGTH
];
448 if (card
->ext_csd
.rev
>= 4) {
449 if (ext_csd
[EXT_CSD_PARTITION_SETTING_COMPLETED
] &
450 EXT_CSD_PART_SETTING_COMPLETED
)
451 card
->ext_csd
.partition_setting_completed
= 1;
453 card
->ext_csd
.partition_setting_completed
= 0;
455 mmc_manage_enhanced_area(card
, ext_csd
);
457 mmc_manage_gp_partitions(card
, ext_csd
);
459 card
->ext_csd
.sec_trim_mult
=
460 ext_csd
[EXT_CSD_SEC_TRIM_MULT
];
461 card
->ext_csd
.sec_erase_mult
=
462 ext_csd
[EXT_CSD_SEC_ERASE_MULT
];
463 card
->ext_csd
.sec_feature_support
=
464 ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
];
465 card
->ext_csd
.trim_timeout
= 300 *
466 ext_csd
[EXT_CSD_TRIM_MULT
];
469 * Note that the call to mmc_part_add above defaults to read
470 * only. If this default assumption is changed, the call must
471 * take into account the value of boot_locked below.
473 card
->ext_csd
.boot_ro_lock
= ext_csd
[EXT_CSD_BOOT_WP
];
474 card
->ext_csd
.boot_ro_lockable
= true;
476 /* Save power class values */
477 card
->ext_csd
.raw_pwr_cl_52_195
=
478 ext_csd
[EXT_CSD_PWR_CL_52_195
];
479 card
->ext_csd
.raw_pwr_cl_26_195
=
480 ext_csd
[EXT_CSD_PWR_CL_26_195
];
481 card
->ext_csd
.raw_pwr_cl_52_360
=
482 ext_csd
[EXT_CSD_PWR_CL_52_360
];
483 card
->ext_csd
.raw_pwr_cl_26_360
=
484 ext_csd
[EXT_CSD_PWR_CL_26_360
];
485 card
->ext_csd
.raw_pwr_cl_200_195
=
486 ext_csd
[EXT_CSD_PWR_CL_200_195
];
487 card
->ext_csd
.raw_pwr_cl_200_360
=
488 ext_csd
[EXT_CSD_PWR_CL_200_360
];
489 card
->ext_csd
.raw_pwr_cl_ddr_52_195
=
490 ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
];
491 card
->ext_csd
.raw_pwr_cl_ddr_52_360
=
492 ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
];
493 card
->ext_csd
.raw_pwr_cl_ddr_200_360
=
494 ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
];
497 if (card
->ext_csd
.rev
>= 5) {
498 /* Adjust production date as per JEDEC JESD84-B451 */
499 if (card
->cid
.year
< 2010)
500 card
->cid
.year
+= 16;
502 /* check whether the eMMC card supports BKOPS */
503 if (ext_csd
[EXT_CSD_BKOPS_SUPPORT
] & 0x1) {
504 card
->ext_csd
.bkops
= 1;
505 card
->ext_csd
.man_bkops_en
=
506 (ext_csd
[EXT_CSD_BKOPS_EN
] &
507 EXT_CSD_MANUAL_BKOPS_MASK
);
508 card
->ext_csd
.raw_bkops_status
=
509 ext_csd
[EXT_CSD_BKOPS_STATUS
];
510 if (!card
->ext_csd
.man_bkops_en
)
511 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
512 mmc_hostname(card
->host
));
515 /* check whether the eMMC card supports HPI */
516 if (!broken_hpi
&& (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x1)) {
517 card
->ext_csd
.hpi
= 1;
518 if (ext_csd
[EXT_CSD_HPI_FEATURES
] & 0x2)
519 card
->ext_csd
.hpi_cmd
= MMC_STOP_TRANSMISSION
;
521 card
->ext_csd
.hpi_cmd
= MMC_SEND_STATUS
;
523 * Indicate the maximum timeout to close
524 * a command interrupted by HPI
526 card
->ext_csd
.out_of_int_time
=
527 ext_csd
[EXT_CSD_OUT_OF_INTERRUPT_TIME
] * 10;
530 card
->ext_csd
.rel_param
= ext_csd
[EXT_CSD_WR_REL_PARAM
];
531 card
->ext_csd
.rst_n_function
= ext_csd
[EXT_CSD_RST_N_FUNCTION
];
534 * RPMB regions are defined in multiples of 128K.
536 card
->ext_csd
.raw_rpmb_size_mult
= ext_csd
[EXT_CSD_RPMB_MULT
];
537 if (ext_csd
[EXT_CSD_RPMB_MULT
] && mmc_host_cmd23(card
->host
)) {
538 mmc_part_add(card
, ext_csd
[EXT_CSD_RPMB_MULT
] << 17,
539 EXT_CSD_PART_CONFIG_ACC_RPMB
,
541 MMC_BLK_DATA_AREA_RPMB
);
545 card
->ext_csd
.raw_erased_mem_count
= ext_csd
[EXT_CSD_ERASED_MEM_CONT
];
546 if (ext_csd
[EXT_CSD_ERASED_MEM_CONT
])
547 card
->erased_byte
= 0xFF;
549 card
->erased_byte
= 0x0;
551 /* eMMC v4.5 or later */
552 if (card
->ext_csd
.rev
>= 6) {
553 card
->ext_csd
.feature_support
|= MMC_DISCARD_FEATURE
;
555 card
->ext_csd
.generic_cmd6_time
= 10 *
556 ext_csd
[EXT_CSD_GENERIC_CMD6_TIME
];
557 card
->ext_csd
.power_off_longtime
= 10 *
558 ext_csd
[EXT_CSD_POWER_OFF_LONG_TIME
];
560 card
->ext_csd
.cache_size
=
561 ext_csd
[EXT_CSD_CACHE_SIZE
+ 0] << 0 |
562 ext_csd
[EXT_CSD_CACHE_SIZE
+ 1] << 8 |
563 ext_csd
[EXT_CSD_CACHE_SIZE
+ 2] << 16 |
564 ext_csd
[EXT_CSD_CACHE_SIZE
+ 3] << 24;
566 if (ext_csd
[EXT_CSD_DATA_SECTOR_SIZE
] == 1)
567 card
->ext_csd
.data_sector_size
= 4096;
569 card
->ext_csd
.data_sector_size
= 512;
571 if ((ext_csd
[EXT_CSD_DATA_TAG_SUPPORT
] & 1) &&
572 (ext_csd
[EXT_CSD_TAG_UNIT_SIZE
] <= 8)) {
573 card
->ext_csd
.data_tag_unit_size
=
574 ((unsigned int) 1 << ext_csd
[EXT_CSD_TAG_UNIT_SIZE
]) *
575 (card
->ext_csd
.data_sector_size
);
577 card
->ext_csd
.data_tag_unit_size
= 0;
580 card
->ext_csd
.max_packed_writes
=
581 ext_csd
[EXT_CSD_MAX_PACKED_WRITES
];
582 card
->ext_csd
.max_packed_reads
=
583 ext_csd
[EXT_CSD_MAX_PACKED_READS
];
585 card
->ext_csd
.data_sector_size
= 512;
588 /* eMMC v5 or later */
589 if (card
->ext_csd
.rev
>= 7) {
590 memcpy(card
->ext_csd
.fwrev
, &ext_csd
[EXT_CSD_FIRMWARE_VERSION
],
592 card
->ext_csd
.ffu_capable
=
593 (ext_csd
[EXT_CSD_SUPPORTED_MODE
] & 0x1) &&
594 !(ext_csd
[EXT_CSD_FW_CONFIG
] & 0x1);
600 static int mmc_read_ext_csd(struct mmc_card
*card
)
605 if (!mmc_can_ext_csd(card
))
608 err
= mmc_get_ext_csd(card
, &ext_csd
);
610 /* If the host or the card can't do the switch,
611 * fail more gracefully. */
618 * High capacity cards should have this "magic" size
619 * stored in their CSD.
621 if (card
->csd
.capacity
== (4096 * 512)) {
622 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
623 mmc_hostname(card
->host
));
625 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
626 mmc_hostname(card
->host
));
633 err
= mmc_decode_ext_csd(card
, ext_csd
);
638 static int mmc_compare_ext_csds(struct mmc_card
*card
, unsigned bus_width
)
643 if (bus_width
== MMC_BUS_WIDTH_1
)
646 err
= mmc_get_ext_csd(card
, &bw_ext_csd
);
650 /* only compare read only fields */
651 err
= !((card
->ext_csd
.raw_partition_support
==
652 bw_ext_csd
[EXT_CSD_PARTITION_SUPPORT
]) &&
653 (card
->ext_csd
.raw_erased_mem_count
==
654 bw_ext_csd
[EXT_CSD_ERASED_MEM_CONT
]) &&
655 (card
->ext_csd
.rev
==
656 bw_ext_csd
[EXT_CSD_REV
]) &&
657 (card
->ext_csd
.raw_ext_csd_structure
==
658 bw_ext_csd
[EXT_CSD_STRUCTURE
]) &&
659 (card
->ext_csd
.raw_card_type
==
660 bw_ext_csd
[EXT_CSD_CARD_TYPE
]) &&
661 (card
->ext_csd
.raw_s_a_timeout
==
662 bw_ext_csd
[EXT_CSD_S_A_TIMEOUT
]) &&
663 (card
->ext_csd
.raw_hc_erase_gap_size
==
664 bw_ext_csd
[EXT_CSD_HC_WP_GRP_SIZE
]) &&
665 (card
->ext_csd
.raw_erase_timeout_mult
==
666 bw_ext_csd
[EXT_CSD_ERASE_TIMEOUT_MULT
]) &&
667 (card
->ext_csd
.raw_hc_erase_grp_size
==
668 bw_ext_csd
[EXT_CSD_HC_ERASE_GRP_SIZE
]) &&
669 (card
->ext_csd
.raw_sec_trim_mult
==
670 bw_ext_csd
[EXT_CSD_SEC_TRIM_MULT
]) &&
671 (card
->ext_csd
.raw_sec_erase_mult
==
672 bw_ext_csd
[EXT_CSD_SEC_ERASE_MULT
]) &&
673 (card
->ext_csd
.raw_sec_feature_support
==
674 bw_ext_csd
[EXT_CSD_SEC_FEATURE_SUPPORT
]) &&
675 (card
->ext_csd
.raw_trim_mult
==
676 bw_ext_csd
[EXT_CSD_TRIM_MULT
]) &&
677 (card
->ext_csd
.raw_sectors
[0] ==
678 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 0]) &&
679 (card
->ext_csd
.raw_sectors
[1] ==
680 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 1]) &&
681 (card
->ext_csd
.raw_sectors
[2] ==
682 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 2]) &&
683 (card
->ext_csd
.raw_sectors
[3] ==
684 bw_ext_csd
[EXT_CSD_SEC_CNT
+ 3]) &&
685 (card
->ext_csd
.raw_pwr_cl_52_195
==
686 bw_ext_csd
[EXT_CSD_PWR_CL_52_195
]) &&
687 (card
->ext_csd
.raw_pwr_cl_26_195
==
688 bw_ext_csd
[EXT_CSD_PWR_CL_26_195
]) &&
689 (card
->ext_csd
.raw_pwr_cl_52_360
==
690 bw_ext_csd
[EXT_CSD_PWR_CL_52_360
]) &&
691 (card
->ext_csd
.raw_pwr_cl_26_360
==
692 bw_ext_csd
[EXT_CSD_PWR_CL_26_360
]) &&
693 (card
->ext_csd
.raw_pwr_cl_200_195
==
694 bw_ext_csd
[EXT_CSD_PWR_CL_200_195
]) &&
695 (card
->ext_csd
.raw_pwr_cl_200_360
==
696 bw_ext_csd
[EXT_CSD_PWR_CL_200_360
]) &&
697 (card
->ext_csd
.raw_pwr_cl_ddr_52_195
==
698 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_195
]) &&
699 (card
->ext_csd
.raw_pwr_cl_ddr_52_360
==
700 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_52_360
]) &&
701 (card
->ext_csd
.raw_pwr_cl_ddr_200_360
==
702 bw_ext_csd
[EXT_CSD_PWR_CL_DDR_200_360
]));
711 MMC_DEV_ATTR(cid
, "%08x%08x%08x%08x\n", card
->raw_cid
[0], card
->raw_cid
[1],
712 card
->raw_cid
[2], card
->raw_cid
[3]);
713 MMC_DEV_ATTR(csd
, "%08x%08x%08x%08x\n", card
->raw_csd
[0], card
->raw_csd
[1],
714 card
->raw_csd
[2], card
->raw_csd
[3]);
715 MMC_DEV_ATTR(date
, "%02d/%04d\n", card
->cid
.month
, card
->cid
.year
);
716 MMC_DEV_ATTR(erase_size
, "%u\n", card
->erase_size
<< 9);
717 MMC_DEV_ATTR(preferred_erase_size
, "%u\n", card
->pref_erase
<< 9);
718 MMC_DEV_ATTR(ffu_capable
, "%d\n", card
->ext_csd
.ffu_capable
);
719 MMC_DEV_ATTR(hwrev
, "0x%x\n", card
->cid
.hwrev
);
720 MMC_DEV_ATTR(manfid
, "0x%06x\n", card
->cid
.manfid
);
721 MMC_DEV_ATTR(name
, "%s\n", card
->cid
.prod_name
);
722 MMC_DEV_ATTR(oemid
, "0x%04x\n", card
->cid
.oemid
);
723 MMC_DEV_ATTR(prv
, "0x%x\n", card
->cid
.prv
);
724 MMC_DEV_ATTR(serial
, "0x%08x\n", card
->cid
.serial
);
725 MMC_DEV_ATTR(enhanced_area_offset
, "%llu\n",
726 card
->ext_csd
.enhanced_area_offset
);
727 MMC_DEV_ATTR(enhanced_area_size
, "%u\n", card
->ext_csd
.enhanced_area_size
);
728 MMC_DEV_ATTR(raw_rpmb_size_mult
, "%#x\n", card
->ext_csd
.raw_rpmb_size_mult
);
729 MMC_DEV_ATTR(rel_sectors
, "%#x\n", card
->ext_csd
.rel_sectors
);
731 static ssize_t
mmc_fwrev_show(struct device
*dev
,
732 struct device_attribute
*attr
,
735 struct mmc_card
*card
= mmc_dev_to_card(dev
);
737 if (card
->ext_csd
.rev
< 7) {
738 return sprintf(buf
, "0x%x\n", card
->cid
.fwrev
);
740 return sprintf(buf
, "0x%*phN\n", MMC_FIRMWARE_LEN
,
741 card
->ext_csd
.fwrev
);
745 static DEVICE_ATTR(fwrev
, S_IRUGO
, mmc_fwrev_show
, NULL
);
747 static struct attribute
*mmc_std_attrs
[] = {
751 &dev_attr_erase_size
.attr
,
752 &dev_attr_preferred_erase_size
.attr
,
753 &dev_attr_fwrev
.attr
,
754 &dev_attr_ffu_capable
.attr
,
755 &dev_attr_hwrev
.attr
,
756 &dev_attr_manfid
.attr
,
758 &dev_attr_oemid
.attr
,
760 &dev_attr_serial
.attr
,
761 &dev_attr_enhanced_area_offset
.attr
,
762 &dev_attr_enhanced_area_size
.attr
,
763 &dev_attr_raw_rpmb_size_mult
.attr
,
764 &dev_attr_rel_sectors
.attr
,
767 ATTRIBUTE_GROUPS(mmc_std
);
769 static struct device_type mmc_type
= {
770 .groups
= mmc_std_groups
,
774 * Select the PowerClass for the current bus width
775 * If power class is defined for 4/8 bit bus in the
776 * extended CSD register, select it by executing the
777 * mmc_switch command.
779 static int __mmc_select_powerclass(struct mmc_card
*card
,
780 unsigned int bus_width
)
782 struct mmc_host
*host
= card
->host
;
783 struct mmc_ext_csd
*ext_csd
= &card
->ext_csd
;
784 unsigned int pwrclass_val
= 0;
787 switch (1 << host
->ios
.vdd
) {
788 case MMC_VDD_165_195
:
789 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
790 pwrclass_val
= ext_csd
->raw_pwr_cl_26_195
;
791 else if (host
->ios
.clock
<= MMC_HIGH_52_MAX_DTR
)
792 pwrclass_val
= (bus_width
<= EXT_CSD_BUS_WIDTH_8
) ?
793 ext_csd
->raw_pwr_cl_52_195
:
794 ext_csd
->raw_pwr_cl_ddr_52_195
;
795 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
796 pwrclass_val
= ext_csd
->raw_pwr_cl_200_195
;
807 if (host
->ios
.clock
<= MMC_HIGH_26_MAX_DTR
)
808 pwrclass_val
= ext_csd
->raw_pwr_cl_26_360
;
809 else if (host
->ios
.clock
<= MMC_HIGH_52_MAX_DTR
)
810 pwrclass_val
= (bus_width
<= EXT_CSD_BUS_WIDTH_8
) ?
811 ext_csd
->raw_pwr_cl_52_360
:
812 ext_csd
->raw_pwr_cl_ddr_52_360
;
813 else if (host
->ios
.clock
<= MMC_HS200_MAX_DTR
)
814 pwrclass_val
= (bus_width
== EXT_CSD_DDR_BUS_WIDTH_8
) ?
815 ext_csd
->raw_pwr_cl_ddr_200_360
:
816 ext_csd
->raw_pwr_cl_200_360
;
819 pr_warn("%s: Voltage range not supported for power class\n",
824 if (bus_width
& (EXT_CSD_BUS_WIDTH_8
| EXT_CSD_DDR_BUS_WIDTH_8
))
825 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_8BIT_MASK
) >>
826 EXT_CSD_PWR_CL_8BIT_SHIFT
;
828 pwrclass_val
= (pwrclass_val
& EXT_CSD_PWR_CL_4BIT_MASK
) >>
829 EXT_CSD_PWR_CL_4BIT_SHIFT
;
831 /* If the power class is different from the default value */
832 if (pwrclass_val
> 0) {
833 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
836 card
->ext_csd
.generic_cmd6_time
);
842 static int mmc_select_powerclass(struct mmc_card
*card
)
844 struct mmc_host
*host
= card
->host
;
845 u32 bus_width
, ext_csd_bits
;
848 /* Power class selection is supported for versions >= 4.0 */
849 if (!mmc_can_ext_csd(card
))
852 bus_width
= host
->ios
.bus_width
;
853 /* Power class values are defined only for 4/8 bit bus */
854 if (bus_width
== MMC_BUS_WIDTH_1
)
857 ddr
= card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
;
859 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
860 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
862 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
863 EXT_CSD_BUS_WIDTH_8
: EXT_CSD_BUS_WIDTH_4
;
865 err
= __mmc_select_powerclass(card
, ext_csd_bits
);
867 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
868 mmc_hostname(host
), 1 << bus_width
, ddr
);
874 * Set the bus speed for the selected speed mode.
876 static void mmc_set_bus_speed(struct mmc_card
*card
)
878 unsigned int max_dtr
= (unsigned int)-1;
880 if ((mmc_card_hs200(card
) || mmc_card_hs400(card
)) &&
881 max_dtr
> card
->ext_csd
.hs200_max_dtr
)
882 max_dtr
= card
->ext_csd
.hs200_max_dtr
;
883 else if (mmc_card_hs(card
) && max_dtr
> card
->ext_csd
.hs_max_dtr
)
884 max_dtr
= card
->ext_csd
.hs_max_dtr
;
885 else if (max_dtr
> card
->csd
.max_dtr
)
886 max_dtr
= card
->csd
.max_dtr
;
888 mmc_set_clock(card
->host
, max_dtr
);
892 * Select the bus width amoung 4-bit and 8-bit(SDR).
893 * If the bus width is changed successfully, return the selected width value.
894 * Zero is returned instead of error value if the wide width is not supported.
896 static int mmc_select_bus_width(struct mmc_card
*card
)
898 static unsigned ext_csd_bits
[] = {
902 static unsigned bus_widths
[] = {
906 struct mmc_host
*host
= card
->host
;
907 unsigned idx
, bus_width
= 0;
910 if (!mmc_can_ext_csd(card
) ||
911 !(host
->caps
& (MMC_CAP_4_BIT_DATA
| MMC_CAP_8_BIT_DATA
)))
914 idx
= (host
->caps
& MMC_CAP_8_BIT_DATA
) ? 0 : 1;
917 * Unlike SD, MMC cards dont have a configuration register to notify
918 * supported bus width. So bus test command should be run to identify
919 * the supported bus width or compare the ext csd values of current
920 * bus width and ext csd values of 1 bit mode read earlier.
922 for (; idx
< ARRAY_SIZE(bus_widths
); idx
++) {
924 * Host is capable of 8bit transfer, then switch
925 * the device to work in 8bit transfer mode. If the
926 * mmc switch command returns error then switch to
927 * 4bit transfer mode. On success set the corresponding
928 * bus width on the host.
930 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
933 card
->ext_csd
.generic_cmd6_time
);
937 bus_width
= bus_widths
[idx
];
938 mmc_set_bus_width(host
, bus_width
);
941 * If controller can't handle bus width test,
942 * compare ext_csd previously read in 1 bit mode
943 * against ext_csd at new bus width
945 if (!(host
->caps
& MMC_CAP_BUS_WIDTH_TEST
))
946 err
= mmc_compare_ext_csds(card
, bus_width
);
948 err
= mmc_bus_test(card
, bus_width
);
954 pr_warn("%s: switch to bus width %d failed\n",
955 mmc_hostname(host
), 1 << bus_width
);
963 * Switch to the high-speed mode
965 static int mmc_select_hs(struct mmc_card
*card
)
969 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
970 EXT_CSD_HS_TIMING
, EXT_CSD_TIMING_HS
,
971 card
->ext_csd
.generic_cmd6_time
,
974 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
980 * Activate wide bus and DDR if supported.
982 static int mmc_select_hs_ddr(struct mmc_card
*card
)
984 struct mmc_host
*host
= card
->host
;
985 u32 bus_width
, ext_csd_bits
;
988 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_52
))
991 bus_width
= host
->ios
.bus_width
;
992 if (bus_width
== MMC_BUS_WIDTH_1
)
995 ext_csd_bits
= (bus_width
== MMC_BUS_WIDTH_8
) ?
996 EXT_CSD_DDR_BUS_WIDTH_8
: EXT_CSD_DDR_BUS_WIDTH_4
;
998 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1001 card
->ext_csd
.generic_cmd6_time
);
1003 pr_err("%s: switch to bus width %d ddr failed\n",
1004 mmc_hostname(host
), 1 << bus_width
);
1009 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1012 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1014 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1015 * in the JEDEC spec for DDR.
1017 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1018 * host controller can support this, like some of the SDHCI
1019 * controller which connect to an eMMC device. Some of these
1020 * host controller still needs to use 1.8v vccq for supporting
1023 * So the sequence will be:
1024 * if (host and device can both support 1.2v IO)
1026 * else if (host and device can both support 1.8v IO)
1028 * so if host and device can only support 3.3v IO, this is the
1031 * WARNING: eMMC rules are NOT the same as SD DDR
1034 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_2V
)
1035 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1037 if (err
&& (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_DDR_1_8V
))
1038 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1040 /* make sure vccq is 3.3v after switching disaster */
1042 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_330
);
1045 mmc_set_timing(host
, MMC_TIMING_MMC_DDR52
);
1050 /* Caller must hold re-tuning */
1051 static int mmc_switch_status(struct mmc_card
*card
)
1056 err
= mmc_send_status(card
, &status
);
1060 return mmc_switch_status_error(card
->host
, status
);
1063 static int mmc_select_hs400(struct mmc_card
*card
)
1065 struct mmc_host
*host
= card
->host
;
1066 bool send_status
= true;
1067 unsigned int max_dtr
;
1072 * HS400 mode requires 8-bit bus width
1074 if (!(card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1075 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
))
1078 if (host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
)
1079 send_status
= false;
1081 /* Reduce frequency to HS frequency */
1082 max_dtr
= card
->ext_csd
.hs_max_dtr
;
1083 mmc_set_clock(host
, max_dtr
);
1085 /* Switch card to HS mode */
1086 val
= EXT_CSD_TIMING_HS
;
1087 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1088 EXT_CSD_HS_TIMING
, val
,
1089 card
->ext_csd
.generic_cmd6_time
,
1090 true, send_status
, true);
1092 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1093 mmc_hostname(host
), err
);
1097 /* Set host controller to HS timing */
1098 mmc_set_timing(card
->host
, MMC_TIMING_MMC_HS
);
1101 err
= mmc_switch_status(card
);
1106 /* Switch card to DDR */
1107 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1109 EXT_CSD_DDR_BUS_WIDTH_8
,
1110 card
->ext_csd
.generic_cmd6_time
);
1112 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1113 mmc_hostname(host
), err
);
1117 /* Switch card to HS400 */
1118 val
= EXT_CSD_TIMING_HS400
|
1119 card
->drive_strength
<< EXT_CSD_DRV_STR_SHIFT
;
1120 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1121 EXT_CSD_HS_TIMING
, val
,
1122 card
->ext_csd
.generic_cmd6_time
,
1123 true, send_status
, true);
1125 pr_err("%s: switch to hs400 failed, err:%d\n",
1126 mmc_hostname(host
), err
);
1130 /* Set host controller to HS400 timing and frequency */
1131 mmc_set_timing(host
, MMC_TIMING_MMC_HS400
);
1132 mmc_set_bus_speed(card
);
1135 err
= mmc_switch_status(card
);
1143 pr_err("%s: %s failed, error %d\n", mmc_hostname(card
->host
),
1148 int mmc_hs200_to_hs400(struct mmc_card
*card
)
1150 return mmc_select_hs400(card
);
1153 int mmc_hs400_to_hs200(struct mmc_card
*card
)
1155 struct mmc_host
*host
= card
->host
;
1156 bool send_status
= true;
1157 unsigned int max_dtr
;
1161 if (host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
)
1162 send_status
= false;
1164 /* Reduce frequency to HS */
1165 max_dtr
= card
->ext_csd
.hs_max_dtr
;
1166 mmc_set_clock(host
, max_dtr
);
1168 /* Switch HS400 to HS DDR */
1169 val
= EXT_CSD_TIMING_HS
;
1170 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_HS_TIMING
,
1171 val
, card
->ext_csd
.generic_cmd6_time
,
1172 true, send_status
, true);
1176 mmc_set_timing(host
, MMC_TIMING_MMC_DDR52
);
1179 err
= mmc_switch_status(card
);
1184 /* Switch HS DDR to HS */
1185 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_BUS_WIDTH
,
1186 EXT_CSD_BUS_WIDTH_8
, card
->ext_csd
.generic_cmd6_time
,
1187 true, send_status
, true);
1191 mmc_set_timing(host
, MMC_TIMING_MMC_HS
);
1194 err
= mmc_switch_status(card
);
1199 /* Switch HS to HS200 */
1200 val
= EXT_CSD_TIMING_HS200
|
1201 card
->drive_strength
<< EXT_CSD_DRV_STR_SHIFT
;
1202 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_HS_TIMING
,
1203 val
, card
->ext_csd
.generic_cmd6_time
, true,
1208 mmc_set_timing(host
, MMC_TIMING_MMC_HS200
);
1211 err
= mmc_switch_status(card
);
1216 mmc_set_bus_speed(card
);
1221 pr_err("%s: %s failed, error %d\n", mmc_hostname(card
->host
),
1226 static void mmc_select_driver_type(struct mmc_card
*card
)
1228 int card_drv_type
, drive_strength
, drv_type
;
1230 card_drv_type
= card
->ext_csd
.raw_driver_strength
|
1231 mmc_driver_type_mask(0);
1233 drive_strength
= mmc_select_drive_strength(card
,
1234 card
->ext_csd
.hs200_max_dtr
,
1235 card_drv_type
, &drv_type
);
1237 card
->drive_strength
= drive_strength
;
1240 mmc_set_driver_type(card
->host
, drv_type
);
1244 * For device supporting HS200 mode, the following sequence
1245 * should be done before executing the tuning process.
1246 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1247 * 2. switch to HS200 mode
1248 * 3. set the clock to > 52Mhz and <=200MHz
1250 static int mmc_select_hs200(struct mmc_card
*card
)
1252 struct mmc_host
*host
= card
->host
;
1253 bool send_status
= true;
1254 unsigned int old_timing
, old_signal_voltage
;
1258 old_signal_voltage
= host
->ios
.signal_voltage
;
1259 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_2V
)
1260 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_120
);
1262 if (err
&& card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200_1_8V
)
1263 err
= __mmc_set_signal_voltage(host
, MMC_SIGNAL_VOLTAGE_180
);
1265 /* If fails try again during next card power cycle */
1269 mmc_select_driver_type(card
);
1271 if (host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
)
1272 send_status
= false;
1275 * Set the bus width(4 or 8) with host's support and
1276 * switch to HS200 mode if bus width is set successfully.
1278 err
= mmc_select_bus_width(card
);
1280 val
= EXT_CSD_TIMING_HS200
|
1281 card
->drive_strength
<< EXT_CSD_DRV_STR_SHIFT
;
1282 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1283 EXT_CSD_HS_TIMING
, val
,
1284 card
->ext_csd
.generic_cmd6_time
,
1285 true, send_status
, true);
1288 old_timing
= host
->ios
.timing
;
1289 mmc_set_timing(host
, MMC_TIMING_MMC_HS200
);
1291 err
= mmc_switch_status(card
);
1293 * mmc_select_timing() assumes timing has not changed if
1294 * it is a switch error.
1296 if (err
== -EBADMSG
)
1297 mmc_set_timing(host
, old_timing
);
1302 /* fall back to the old signal voltage, if fails report error */
1303 if (__mmc_set_signal_voltage(host
, old_signal_voltage
))
1306 pr_err("%s: %s failed, error %d\n", mmc_hostname(card
->host
),
1313 * Activate High Speed or HS200 mode if supported.
1315 static int mmc_select_timing(struct mmc_card
*card
)
1319 if (!mmc_can_ext_csd(card
))
1322 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS200
)
1323 err
= mmc_select_hs200(card
);
1324 else if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS
)
1325 err
= mmc_select_hs(card
);
1327 if (err
&& err
!= -EBADMSG
)
1332 * Set the bus speed to the selected bus timing.
1333 * If timing is not selected, backward compatible is the default.
1335 mmc_set_bus_speed(card
);
1340 * Execute tuning sequence to seek the proper bus operating
1341 * conditions for HS200 and HS400, which sends CMD21 to the device.
1343 static int mmc_hs200_tuning(struct mmc_card
*card
)
1345 struct mmc_host
*host
= card
->host
;
1348 * Timing should be adjusted to the HS400 target
1349 * operation frequency for tuning process
1351 if (card
->mmc_avail_type
& EXT_CSD_CARD_TYPE_HS400
&&
1352 host
->ios
.bus_width
== MMC_BUS_WIDTH_8
)
1353 if (host
->ops
->prepare_hs400_tuning
)
1354 host
->ops
->prepare_hs400_tuning(host
, &host
->ios
);
1356 return mmc_execute_tuning(card
);
1360 * Handle the detection and initialisation of a card.
1362 * In the case of a resume, "oldcard" will contain the card
1363 * we're trying to reinitialise.
1365 static int mmc_init_card(struct mmc_host
*host
, u32 ocr
,
1366 struct mmc_card
*oldcard
)
1368 struct mmc_card
*card
;
1374 WARN_ON(!host
->claimed
);
1376 /* Set correct bus mode for MMC before attempting init */
1377 if (!mmc_host_is_spi(host
))
1378 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
1381 * Since we're changing the OCR value, we seem to
1382 * need to tell some cards to go back to the idle
1383 * state. We wait 1ms to give cards time to
1385 * mmc_go_idle is needed for eMMC that are asleep
1389 /* The extra bit indicates that we support high capacity */
1390 err
= mmc_send_op_cond(host
, ocr
| (1 << 30), &rocr
);
1395 * For SPI, enable CRC as appropriate.
1397 if (mmc_host_is_spi(host
)) {
1398 err
= mmc_spi_set_crc(host
, use_spi_crc
);
1404 * Fetch CID from card.
1406 if (mmc_host_is_spi(host
))
1407 err
= mmc_send_cid(host
, cid
);
1409 err
= mmc_all_send_cid(host
, cid
);
1414 if (memcmp(cid
, oldcard
->raw_cid
, sizeof(cid
)) != 0) {
1422 * Allocate card structure.
1424 card
= mmc_alloc_card(host
, &mmc_type
);
1426 err
= PTR_ERR(card
);
1431 card
->type
= MMC_TYPE_MMC
;
1433 memcpy(card
->raw_cid
, cid
, sizeof(card
->raw_cid
));
1437 * Call the optional HC's init_card function to handle quirks.
1439 if (host
->ops
->init_card
)
1440 host
->ops
->init_card(host
, card
);
1443 * For native busses: set card RCA and quit open drain mode.
1445 if (!mmc_host_is_spi(host
)) {
1446 err
= mmc_set_relative_addr(card
);
1450 mmc_set_bus_mode(host
, MMC_BUSMODE_PUSHPULL
);
1455 * Fetch CSD from card.
1457 err
= mmc_send_csd(card
, card
->raw_csd
);
1461 err
= mmc_decode_csd(card
);
1464 err
= mmc_decode_cid(card
);
1470 * handling only for cards supporting DSR and hosts requesting
1473 if (card
->csd
.dsr_imp
&& host
->dsr_req
)
1477 * Select card, as all following commands rely on that.
1479 if (!mmc_host_is_spi(host
)) {
1480 err
= mmc_select_card(card
);
1486 /* Read extended CSD. */
1487 err
= mmc_read_ext_csd(card
);
1492 * If doing byte addressing, check if required to do sector
1493 * addressing. Handle the case of <2GB cards needing sector
1494 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1495 * ocr register has bit 30 set for sector addressing.
1498 mmc_card_set_blockaddr(card
);
1500 /* Erase size depends on CSD and Extended CSD */
1501 mmc_set_erase_size(card
);
1505 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1506 * bit. This bit will be lost every time after a reset or power off.
1508 if (card
->ext_csd
.partition_setting_completed
||
1509 (card
->ext_csd
.rev
>= 3 && (host
->caps2
& MMC_CAP2_HC_ERASE_SZ
))) {
1510 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1511 EXT_CSD_ERASE_GROUP_DEF
, 1,
1512 card
->ext_csd
.generic_cmd6_time
);
1514 if (err
&& err
!= -EBADMSG
)
1520 * Just disable enhanced area off & sz
1521 * will try to enable ERASE_GROUP_DEF
1522 * during next time reinit
1524 card
->ext_csd
.enhanced_area_offset
= -EINVAL
;
1525 card
->ext_csd
.enhanced_area_size
= -EINVAL
;
1527 card
->ext_csd
.erase_group_def
= 1;
1529 * enable ERASE_GRP_DEF successfully.
1530 * This will affect the erase size, so
1531 * here need to reset erase size
1533 mmc_set_erase_size(card
);
1538 * Ensure eMMC user default partition is enabled
1540 if (card
->ext_csd
.part_config
& EXT_CSD_PART_CONFIG_ACC_MASK
) {
1541 card
->ext_csd
.part_config
&= ~EXT_CSD_PART_CONFIG_ACC_MASK
;
1542 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
, EXT_CSD_PART_CONFIG
,
1543 card
->ext_csd
.part_config
,
1544 card
->ext_csd
.part_time
);
1545 if (err
&& err
!= -EBADMSG
)
1550 * Enable power_off_notification byte in the ext_csd register
1552 if (card
->ext_csd
.rev
>= 6) {
1553 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1554 EXT_CSD_POWER_OFF_NOTIFICATION
,
1556 card
->ext_csd
.generic_cmd6_time
);
1557 if (err
&& err
!= -EBADMSG
)
1561 * The err can be -EBADMSG or 0,
1562 * so check for success and update the flag
1565 card
->ext_csd
.power_off_notification
= EXT_CSD_POWER_ON
;
1569 * Select timing interface
1571 err
= mmc_select_timing(card
);
1575 if (mmc_card_hs200(card
)) {
1576 err
= mmc_hs200_tuning(card
);
1580 err
= mmc_select_hs400(card
);
1583 } else if (mmc_card_hs(card
)) {
1584 /* Select the desired bus width optionally */
1585 err
= mmc_select_bus_width(card
);
1587 err
= mmc_select_hs_ddr(card
);
1594 * Choose the power class with selected bus interface
1596 mmc_select_powerclass(card
);
1599 * Enable HPI feature (if supported)
1601 if (card
->ext_csd
.hpi
) {
1602 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1603 EXT_CSD_HPI_MGMT
, 1,
1604 card
->ext_csd
.generic_cmd6_time
);
1605 if (err
&& err
!= -EBADMSG
)
1608 pr_warn("%s: Enabling HPI failed\n",
1609 mmc_hostname(card
->host
));
1612 card
->ext_csd
.hpi_en
= 1;
1616 * If cache size is higher than 0, this indicates
1617 * the existence of cache and it can be turned on.
1619 if (card
->ext_csd
.cache_size
> 0) {
1620 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1621 EXT_CSD_CACHE_CTRL
, 1,
1622 card
->ext_csd
.generic_cmd6_time
);
1623 if (err
&& err
!= -EBADMSG
)
1627 * Only if no error, cache is turned on successfully.
1630 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1631 mmc_hostname(card
->host
), err
);
1632 card
->ext_csd
.cache_ctrl
= 0;
1635 card
->ext_csd
.cache_ctrl
= 1;
1640 * The mandatory minimum values are defined for packed command.
1643 if (card
->ext_csd
.max_packed_writes
>= 3 &&
1644 card
->ext_csd
.max_packed_reads
>= 5 &&
1645 host
->caps2
& MMC_CAP2_PACKED_CMD
) {
1646 err
= mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1647 EXT_CSD_EXP_EVENTS_CTRL
,
1648 EXT_CSD_PACKED_EVENT_EN
,
1649 card
->ext_csd
.generic_cmd6_time
);
1650 if (err
&& err
!= -EBADMSG
)
1653 pr_warn("%s: Enabling packed event failed\n",
1654 mmc_hostname(card
->host
));
1655 card
->ext_csd
.packed_event_en
= 0;
1658 card
->ext_csd
.packed_event_en
= 1;
1669 mmc_remove_card(card
);
1674 static int mmc_can_sleep(struct mmc_card
*card
)
1676 return (card
&& card
->ext_csd
.rev
>= 3);
1679 static int mmc_sleep(struct mmc_host
*host
)
1681 struct mmc_command cmd
= {0};
1682 struct mmc_card
*card
= host
->card
;
1683 unsigned int timeout_ms
= DIV_ROUND_UP(card
->ext_csd
.sa_timeout
, 10000);
1686 /* Re-tuning can't be done once the card is deselected */
1687 mmc_retune_hold(host
);
1689 err
= mmc_deselect_cards(host
);
1693 cmd
.opcode
= MMC_SLEEP_AWAKE
;
1694 cmd
.arg
= card
->rca
<< 16;
1698 * If the max_busy_timeout of the host is specified, validate it against
1699 * the sleep cmd timeout. A failure means we need to prevent the host
1700 * from doing hw busy detection, which is done by converting to a R1
1701 * response instead of a R1B.
1703 if (host
->max_busy_timeout
&& (timeout_ms
> host
->max_busy_timeout
)) {
1704 cmd
.flags
= MMC_RSP_R1
| MMC_CMD_AC
;
1706 cmd
.flags
= MMC_RSP_R1B
| MMC_CMD_AC
;
1707 cmd
.busy_timeout
= timeout_ms
;
1710 err
= mmc_wait_for_cmd(host
, &cmd
, 0);
1715 * If the host does not wait while the card signals busy, then we will
1716 * will have to wait the sleep/awake timeout. Note, we cannot use the
1717 * SEND_STATUS command to poll the status because that command (and most
1718 * others) is invalid while the card sleeps.
1720 if (!cmd
.busy_timeout
|| !(host
->caps
& MMC_CAP_WAIT_WHILE_BUSY
))
1721 mmc_delay(timeout_ms
);
1724 mmc_retune_release(host
);
1728 static int mmc_can_poweroff_notify(const struct mmc_card
*card
)
1731 mmc_card_mmc(card
) &&
1732 (card
->ext_csd
.power_off_notification
== EXT_CSD_POWER_ON
);
1735 static int mmc_poweroff_notify(struct mmc_card
*card
, unsigned int notify_type
)
1737 unsigned int timeout
= card
->ext_csd
.generic_cmd6_time
;
1740 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1741 if (notify_type
== EXT_CSD_POWER_OFF_LONG
)
1742 timeout
= card
->ext_csd
.power_off_longtime
;
1744 err
= __mmc_switch(card
, EXT_CSD_CMD_SET_NORMAL
,
1745 EXT_CSD_POWER_OFF_NOTIFICATION
,
1746 notify_type
, timeout
, true, false, false);
1748 pr_err("%s: Power Off Notification timed out, %u\n",
1749 mmc_hostname(card
->host
), timeout
);
1751 /* Disable the power off notification after the switch operation. */
1752 card
->ext_csd
.power_off_notification
= EXT_CSD_NO_POWER_NOTIFICATION
;
1758 * Host is being removed. Free up the current card.
1760 static void mmc_remove(struct mmc_host
*host
)
1763 BUG_ON(!host
->card
);
1765 mmc_remove_card(host
->card
);
1770 * Card detection - card is alive.
1772 static int mmc_alive(struct mmc_host
*host
)
1774 return mmc_send_status(host
->card
, NULL
);
1778 * Card detection callback from host.
1780 static void mmc_detect(struct mmc_host
*host
)
1785 BUG_ON(!host
->card
);
1787 mmc_get_card(host
->card
);
1790 * Just check if our card has been removed.
1792 err
= _mmc_detect_card_removed(host
);
1794 mmc_put_card(host
->card
);
1799 mmc_claim_host(host
);
1800 mmc_detach_bus(host
);
1801 mmc_power_off(host
);
1802 mmc_release_host(host
);
1806 static int _mmc_suspend(struct mmc_host
*host
, bool is_suspend
)
1809 unsigned int notify_type
= is_suspend
? EXT_CSD_POWER_OFF_SHORT
:
1810 EXT_CSD_POWER_OFF_LONG
;
1813 BUG_ON(!host
->card
);
1815 mmc_claim_host(host
);
1817 if (mmc_card_suspended(host
->card
))
1820 if (mmc_card_doing_bkops(host
->card
)) {
1821 err
= mmc_stop_bkops(host
->card
);
1826 err
= mmc_flush_cache(host
->card
);
1830 if (mmc_can_poweroff_notify(host
->card
) &&
1831 ((host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
) || !is_suspend
))
1832 err
= mmc_poweroff_notify(host
->card
, notify_type
);
1833 else if (mmc_can_sleep(host
->card
))
1834 err
= mmc_sleep(host
);
1835 else if (!mmc_host_is_spi(host
))
1836 err
= mmc_deselect_cards(host
);
1839 mmc_power_off(host
);
1840 mmc_card_set_suspended(host
->card
);
1843 mmc_release_host(host
);
1850 static int mmc_suspend(struct mmc_host
*host
)
1854 err
= _mmc_suspend(host
, true);
1856 pm_runtime_disable(&host
->card
->dev
);
1857 pm_runtime_set_suspended(&host
->card
->dev
);
1864 * This function tries to determine if the same card is still present
1865 * and, if so, restore all state to it.
1867 static int _mmc_resume(struct mmc_host
*host
)
1872 BUG_ON(!host
->card
);
1874 mmc_claim_host(host
);
1876 if (!mmc_card_suspended(host
->card
))
1879 mmc_power_up(host
, host
->card
->ocr
);
1880 err
= mmc_init_card(host
, host
->card
->ocr
, host
->card
);
1881 mmc_card_clr_suspended(host
->card
);
1884 mmc_release_host(host
);
1891 static int mmc_shutdown(struct mmc_host
*host
)
1896 * In a specific case for poweroff notify, we need to resume the card
1897 * before we can shutdown it properly.
1899 if (mmc_can_poweroff_notify(host
->card
) &&
1900 !(host
->caps2
& MMC_CAP2_FULL_PWR_CYCLE
))
1901 err
= _mmc_resume(host
);
1904 err
= _mmc_suspend(host
, false);
1910 * Callback for resume.
1912 static int mmc_resume(struct mmc_host
*host
)
1914 pm_runtime_enable(&host
->card
->dev
);
1919 * Callback for runtime_suspend.
1921 static int mmc_runtime_suspend(struct mmc_host
*host
)
1925 if (!(host
->caps
& MMC_CAP_AGGRESSIVE_PM
))
1928 err
= _mmc_suspend(host
, true);
1930 pr_err("%s: error %d doing aggressive suspend\n",
1931 mmc_hostname(host
), err
);
1937 * Callback for runtime_resume.
1939 static int mmc_runtime_resume(struct mmc_host
*host
)
1943 err
= _mmc_resume(host
);
1944 if (err
&& err
!= -ENOMEDIUM
)
1945 pr_err("%s: error %d doing runtime resume\n",
1946 mmc_hostname(host
), err
);
1951 int mmc_can_reset(struct mmc_card
*card
)
1955 rst_n_function
= card
->ext_csd
.rst_n_function
;
1956 if ((rst_n_function
& EXT_CSD_RST_N_EN_MASK
) != EXT_CSD_RST_N_ENABLED
)
1960 EXPORT_SYMBOL(mmc_can_reset
);
1962 static int mmc_reset(struct mmc_host
*host
)
1964 struct mmc_card
*card
= host
->card
;
1967 * In the case of recovery, we can't expect flushing the cache to work
1968 * always, but we have a go and ignore errors.
1970 mmc_flush_cache(host
->card
);
1972 if ((host
->caps
& MMC_CAP_HW_RESET
) && host
->ops
->hw_reset
&&
1973 mmc_can_reset(card
)) {
1974 /* If the card accept RST_n signal, send it. */
1975 mmc_set_clock(host
, host
->f_init
);
1976 host
->ops
->hw_reset(host
);
1977 /* Set initial state and call mmc_set_ios */
1978 mmc_set_initial_state(host
);
1980 /* Do a brute force power cycle */
1981 mmc_power_cycle(host
, card
->ocr
);
1983 return mmc_init_card(host
, card
->ocr
, card
);
1986 static const struct mmc_bus_ops mmc_ops
= {
1987 .remove
= mmc_remove
,
1988 .detect
= mmc_detect
,
1989 .suspend
= mmc_suspend
,
1990 .resume
= mmc_resume
,
1991 .runtime_suspend
= mmc_runtime_suspend
,
1992 .runtime_resume
= mmc_runtime_resume
,
1994 .shutdown
= mmc_shutdown
,
1999 * Starting point for MMC card init.
2001 int mmc_attach_mmc(struct mmc_host
*host
)
2007 WARN_ON(!host
->claimed
);
2009 /* Set correct bus mode for MMC before attempting attach */
2010 if (!mmc_host_is_spi(host
))
2011 mmc_set_bus_mode(host
, MMC_BUSMODE_OPENDRAIN
);
2013 err
= mmc_send_op_cond(host
, 0, &ocr
);
2017 mmc_attach_bus(host
, &mmc_ops
);
2018 if (host
->ocr_avail_mmc
)
2019 host
->ocr_avail
= host
->ocr_avail_mmc
;
2022 * We need to get OCR a different way for SPI.
2024 if (mmc_host_is_spi(host
)) {
2025 err
= mmc_spi_read_ocr(host
, 1, &ocr
);
2030 rocr
= mmc_select_voltage(host
, ocr
);
2033 * Can we support the voltage of the card?
2041 * Detect and init the card.
2043 err
= mmc_init_card(host
, rocr
, NULL
);
2047 mmc_release_host(host
);
2048 err
= mmc_add_card(host
->card
);
2052 mmc_claim_host(host
);
2056 mmc_remove_card(host
->card
);
2057 mmc_claim_host(host
);
2060 mmc_detach_bus(host
);
2062 pr_err("%s: error %d whilst initialising MMC card\n",
2063 mmc_hostname(host
), err
);