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mmc: boot partition ro lock support
[linux-2.6-block.git] / drivers / mmc / core / mmc.c
CommitLineData
7ea239d9 1/*
70f10482 2 * linux/drivers/mmc/core/mmc.c
7ea239d9
PO		 3 *
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.
7 *
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.
11 */
12
13#include <linux/err.h>
5a0e3ad6 14#include <linux/slab.h>
0205a904 15#include <linux/stat.h>
7ea239d9
PO		 16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20
21#include "core.h"
4101c16a 22#include "bus.h"
7ea239d9 23#include "mmc_ops.h"
4c4cb171 24#include "sd_ops.h"
7ea239d9
PO		 25
26static const unsigned int tran_exp[] = {
27 10000, 100000, 1000000, 10000000,
28 0, 0, 0, 0
29};
30
31static const unsigned char tran_mant[] = {
32 0, 10, 12, 13, 15, 20, 25, 30,
33 35, 40, 45, 50, 55, 60, 70, 80,
34};
35
36static const unsigned int tacc_exp[] = {
37 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
38};
39
40static const unsigned int tacc_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
43};
44
45#define UNSTUFF_BITS(resp,start,size) \
46 ({ \
47 const int __size = size; \
48 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
49 const int __off = 3 - ((start) / 32); \
50 const int __shft = (start) & 31; \
51 u32 __res; \
52 \
53 __res = resp[__off] >> __shft; \
54 if (__size + __shft > 32) \
55 __res |= resp[__off-1] << ((32 - __shft) % 32); \
56 __res & __mask; \
57 })
58
59/*
60 * Given the decoded CSD structure, decode the raw CID to our CID structure.
61 */
bd766312 62static int mmc_decode_cid(struct mmc_card *card)
7ea239d9
PO		 63{
64 u32 *resp = card->raw_cid;
65
66 /*
67 * The selection of the format here is based upon published
68 * specs from sandisk and from what people have reported.
69 */
70 switch (card->csd.mmca_vsn) {
71 case 0: /* MMC v1.0 - v1.2 */
72 case 1: /* MMC v1.4 */
73 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
74 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
75 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
76 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
77 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
78 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
79 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
80 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
84 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
85 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
86 break;
87
88 case 2: /* MMC v2.0 - v2.2 */
89 case 3: /* MMC v3.1 - v3.3 */
90 case 4: /* MMC v4 */
91 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
92 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
93 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
94 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
95 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
96 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
97 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
98 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
102 break;
103
104 default:
a3c76eb9 105 pr_err("%s: card has unknown MMCA version %d\n",
7ea239d9 106 mmc_hostname(card->host), card->csd.mmca_vsn);
bd766312 107 return -EINVAL;
7ea239d9 108 }
bd766312
PO		 109
110 return 0;
7ea239d9
PO		 111}
112
dfe86cba
AH		 113static void mmc_set_erase_size(struct mmc_card *card)
114{
115 if (card->ext_csd.erase_group_def & 1)
116 card->erase_size = card->ext_csd.hc_erase_size;
117 else
118 card->erase_size = card->csd.erase_size;
119
120 mmc_init_erase(card);
121}
122
7ea239d9
PO		 123/*
124 * Given a 128-bit response, decode to our card CSD structure.
125 */
bd766312 126static int mmc_decode_csd(struct mmc_card *card)
7ea239d9
PO		 127{
128 struct mmc_csd *csd = &card->csd;
dfe86cba 129 unsigned int e, m, a, b;
7ea239d9
PO		 130 u32 *resp = card->raw_csd;
131
132 /*
133 * We only understand CSD structure v1.1 and v1.2.
134 * v1.2 has extra information in bits 15, 11 and 10.
6da24b78 135 * We also support eMMC v4.4 & v4.41.
7ea239d9 136 */
6da24b78
KP		 137 csd->structure = UNSTUFF_BITS(resp, 126, 2);
138 if (csd->structure == 0) {
a3c76eb9 139 pr_err("%s: unrecognised CSD structure version %d\n",
6da24b78 140 mmc_hostname(card->host), csd->structure);
bd766312 141 return -EINVAL;
7ea239d9
PO		 142 }
143
144 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
145 m = UNSTUFF_BITS(resp, 115, 4);
146 e = UNSTUFF_BITS(resp, 112, 3);
147 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
148 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
149
150 m = UNSTUFF_BITS(resp, 99, 4);
151 e = UNSTUFF_BITS(resp, 96, 3);
152 csd->max_dtr = tran_exp[e] * tran_mant[m];
153 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
154
155 e = UNSTUFF_BITS(resp, 47, 3);
156 m = UNSTUFF_BITS(resp, 62, 12);
157 csd->capacity = (1 + m) << (e + 2);
158
159 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
160 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
161 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
162 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
163 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
164 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
165 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
bd766312 166
dfe86cba
AH		 167 if (csd->write_blkbits >= 9) {
168 a = UNSTUFF_BITS(resp, 42, 5);
169 b = UNSTUFF_BITS(resp, 37, 5);
170 csd->erase_size = (a + 1) * (b + 1);
171 csd->erase_size <<= csd->write_blkbits - 9;
172 }
173
bd766312 174 return 0;
7ea239d9
PO		 175}
176
177/*
08ee80cc 178 * Read extended CSD.
7ea239d9 179 */
08ee80cc 180static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
7ea239d9
PO		 181{
182 int err;
183 u8 *ext_csd;
184
185 BUG_ON(!card);
08ee80cc
PR		 186 BUG_ON(!new_ext_csd);
187
188 *new_ext_csd = NULL;
7ea239d9 189
7ea239d9 190 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
17b0429d 191 return 0;
7ea239d9
PO		 192
193 /*
194 * As the ext_csd is so large and mostly unused, we don't store the
195 * raw block in mmc_card.
196 */
197 ext_csd = kmalloc(512, GFP_KERNEL);
198 if (!ext_csd) {
a3c76eb9 199 pr_err("%s: could not allocate a buffer to "
adf66a0d 200 "receive the ext_csd.\n", mmc_hostname(card->host));
17b0429d 201 return -ENOMEM;
7ea239d9
PO		 202 }
203
204 err = mmc_send_ext_csd(card, ext_csd);
17b0429d 205 if (err) {
08ee80cc
PR		 206 kfree(ext_csd);
207 *new_ext_csd = NULL;
208
d08ebedd
WM		 209 /* If the host or the card can't do the switch,
210 * fail more gracefully. */
211 if ((err != -EINVAL)
212 && (err != -ENOSYS)
213 && (err != -EFAULT))
08ee80cc 214 return err;
adf66a0d 215
7ea239d9
PO		 216 /*
217 * High capacity cards should have this "magic" size
218 * stored in their CSD.
219 */
220 if (card->csd.capacity == (4096 * 512)) {
a3c76eb9 221 pr_err("%s: unable to read EXT_CSD "
7ea239d9
PO		 222 "on a possible high capacity card. "
223 "Card will be ignored.\n",
224 mmc_hostname(card->host));
225 } else {
a3c76eb9 226 pr_warning("%s: unable to read "
7ea239d9
PO		 227 "EXT_CSD, performance might "
228 "suffer.\n",
229 mmc_hostname(card->host));
17b0429d 230 err = 0;
7ea239d9 231 }
08ee80cc
PR		 232 } else
233 *new_ext_csd = ext_csd;
adf66a0d 234
08ee80cc
PR		 235 return err;
236}
237
238/*
239 * Decode extended CSD.
240 */
241static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
242{
e0c368d5
NJ		 243 int err = 0, idx;
244 unsigned int part_size;
245 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
08ee80cc
PR		 246
247 BUG_ON(!card);
248
249 if (!ext_csd)
250 return 0;
7ea239d9 251
6da24b78 252 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
f39b2dd9 253 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
6da24b78 254 if (card->csd.structure == 3) {
f39b2dd9 255 if (card->ext_csd.raw_ext_csd_structure > 2) {
a3c76eb9 256 pr_err("%s: unrecognised EXT_CSD structure "
6da24b78 257 "version %d\n", mmc_hostname(card->host),
f39b2dd9 258 card->ext_csd.raw_ext_csd_structure);
6da24b78
KP		 259 err = -EINVAL;
260 goto out;
261 }
262 }
263
b1ebe384 264 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
38ca2850 265 if (card->ext_csd.rev > 6) {
a3c76eb9 266 pr_err("%s: unrecognised EXT_CSD revision %d\n",
6da24b78 267 mmc_hostname(card->host), card->ext_csd.rev);
00cedfa6
FM		 268 err = -EINVAL;
269 goto out;
d7604d76
PO		 270 }
271
f39b2dd9
PR		 272 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
273 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
274 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
275 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
b1ebe384 276 if (card->ext_csd.rev >= 2) {
d7604d76
PO		 277 card->ext_csd.sectors =
278 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
279 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
280 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
281 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
fc8a0985
HP		 282
283 /* Cards with density > 2GiB are sector addressed */
284 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
d7604d76
PO		 285 mmc_card_set_blockaddr(card);
286 }
f39b2dd9 287 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
7198f3c9 288 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
dfc13e84
HP		 289 case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
290 EXT_CSD_CARD_TYPE_26:
291 card->ext_csd.hs_max_dtr = 52000000;
292 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
293 break;
294 case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
295 EXT_CSD_CARD_TYPE_26:
296 card->ext_csd.hs_max_dtr = 52000000;
297 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
298 break;
299 case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
300 EXT_CSD_CARD_TYPE_26:
301 card->ext_csd.hs_max_dtr = 52000000;
302 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
303 break;
7ea239d9
PO		 304 case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
305 card->ext_csd.hs_max_dtr = 52000000;
306 break;
307 case EXT_CSD_CARD_TYPE_26:
308 card->ext_csd.hs_max_dtr = 26000000;
309 break;
310 default:
311 /* MMC v4 spec says this cannot happen */
a3c76eb9 312 pr_warning("%s: card is mmc v4 but doesn't "
7ea239d9
PO		 313 "support any high-speed modes.\n",
314 mmc_hostname(card->host));
7ea239d9
PO		 315 }
316
f39b2dd9
PR		 317 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
318 card->ext_csd.raw_erase_timeout_mult =
319 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
320 card->ext_csd.raw_hc_erase_grp_size =
321 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
b1ebe384
JL		 322 if (card->ext_csd.rev >= 3) {
323 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
371a689f
AW		 324 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
325
326 /* EXT_CSD value is in units of 10ms, but we store in ms */
327 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
b1ebe384
JL		 328
329 /* Sleep / awake timeout in 100ns units */
330 if (sa_shift > 0 && sa_shift <= 0x17)
331 card->ext_csd.sa_timeout =
332 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
dfe86cba
AH		 333 card->ext_csd.erase_group_def =
334 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
335 card->ext_csd.hc_erase_timeout = 300 *
336 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
337 card->ext_csd.hc_erase_size =
338 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
f4c5522b
AW		 339
340 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
371a689f
AW		 341
342 /*
343 * There are two boot regions of equal size, defined in
344 * multiples of 128K.
345 */
e0c368d5
NJ		 346 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
347 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
348 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
349 mmc_part_add(card, part_size,
350 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
add710ea
JR		 351 "boot%d", idx, true,
352 MMC_BLK_DATA_AREA_BOOT);
e0c368d5
NJ		 353 }
354 }
dfe86cba
AH		 355 }
356
f39b2dd9
PR		 357 card->ext_csd.raw_hc_erase_gap_size =
358 ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
359 card->ext_csd.raw_sec_trim_mult =
360 ext_csd[EXT_CSD_SEC_TRIM_MULT];
361 card->ext_csd.raw_sec_erase_mult =
362 ext_csd[EXT_CSD_SEC_ERASE_MULT];
363 card->ext_csd.raw_sec_feature_support =
364 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
365 card->ext_csd.raw_trim_mult =
366 ext_csd[EXT_CSD_TRIM_MULT];
dfe86cba 367 if (card->ext_csd.rev >= 4) {
709de99d
CD		 368 /*
369 * Enhanced area feature support -- check whether the eMMC
370 * card has the Enhanced area enabled. If so, export enhanced
371 * area offset and size to user by adding sysfs interface.
372 */
5238acbe 373 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
709de99d 374 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
f39b2dd9 375 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
e0c368d5 376 hc_erase_grp_sz =
709de99d 377 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
e0c368d5 378 hc_wp_grp_sz =
709de99d
CD		 379 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
380
381 card->ext_csd.enhanced_area_en = 1;
382 /*
383 * calculate the enhanced data area offset, in bytes
384 */
385 card->ext_csd.enhanced_area_offset =
386 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
387 (ext_csd[137] << 8) + ext_csd[136];
388 if (mmc_card_blockaddr(card))
389 card->ext_csd.enhanced_area_offset <<= 9;
390 /*
391 * calculate the enhanced data area size, in kilobytes
392 */
393 card->ext_csd.enhanced_area_size =
394 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
395 ext_csd[140];
396 card->ext_csd.enhanced_area_size *=
397 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
398 card->ext_csd.enhanced_area_size <<= 9;
399 } else {
400 /*
401 * If the enhanced area is not enabled, disable these
402 * device attributes.
403 */
404 card->ext_csd.enhanced_area_offset = -EINVAL;
405 card->ext_csd.enhanced_area_size = -EINVAL;
406 }
e0c368d5
NJ		 407
408 /*
409 * General purpose partition feature support --
410 * If ext_csd has the size of general purpose partitions,
411 * set size, part_cfg, partition name in mmc_part.
412 */
413 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
414 EXT_CSD_PART_SUPPORT_PART_EN) {
415 if (card->ext_csd.enhanced_area_en != 1) {
416 hc_erase_grp_sz =
417 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
418 hc_wp_grp_sz =
419 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
420
421 card->ext_csd.enhanced_area_en = 1;
422 }
423
424 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
425 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
426 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
427 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
428 continue;
429 part_size =
430 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
431 << 16) +
432 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
433 << 8) +
434 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
435 part_size *= (size_t)(hc_erase_grp_sz *
436 hc_wp_grp_sz);
437 mmc_part_add(card, part_size << 19,
438 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
add710ea
JR		 439 "gp%d", idx, false,
440 MMC_BLK_DATA_AREA_GP);
e0c368d5
NJ		 441 }
442 }
dfe86cba
AH		 443 card->ext_csd.sec_trim_mult =
444 ext_csd[EXT_CSD_SEC_TRIM_MULT];
445 card->ext_csd.sec_erase_mult =
446 ext_csd[EXT_CSD_SEC_ERASE_MULT];
447 card->ext_csd.sec_feature_support =
448 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
449 card->ext_csd.trim_timeout = 300 *
450 ext_csd[EXT_CSD_TRIM_MULT];
add710ea
JR		 451
452 /*
453 * Note that the call to mmc_part_add above defaults to read
454 * only. If this default assumption is changed, the call must
455 * take into account the value of boot_locked below.
456 */
457 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
458 card->ext_csd.boot_ro_lockable = true;
b1ebe384
JL		 459 }
460
b2499518 461 if (card->ext_csd.rev >= 5) {
eb0d8f13
JC		 462 /* check whether the eMMC card supports HPI */
463 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
464 card->ext_csd.hpi = 1;
465 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
466 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
467 else
468 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
469 /*
470 * Indicate the maximum timeout to close
471 * a command interrupted by HPI
472 */
473 card->ext_csd.out_of_int_time =
474 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
475 }
476
f4c5522b 477 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
b2499518
AH		 478 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
479 }
f4c5522b 480
5238acbe 481 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
dfe86cba
AH		 482 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
483 card->erased_byte = 0xFF;
484 else
485 card->erased_byte = 0x0;
486
336c716a 487 /* eMMC v4.5 or later */
bec8726a 488 if (card->ext_csd.rev >= 6) {
336c716a
SJ		 489 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
490
b23cf0bd
SJ		 491 card->ext_csd.generic_cmd6_time = 10 *
492 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
bec8726a
G		 493 card->ext_csd.power_off_longtime = 10 *
494 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
b23cf0bd 495
336c716a
SJ		 496 card->ext_csd.cache_size =
497 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
498 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
499 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
500 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
501 }
881d1c25 502
7ea239d9 503out:
08ee80cc
PR		 504 return err;
505}
506
507static inline void mmc_free_ext_csd(u8 *ext_csd)
508{
7ea239d9 509 kfree(ext_csd);
08ee80cc
PR		 510}
511
7ea239d9 512
f39b2dd9 513static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
08ee80cc
PR		 514{
515 u8 *bw_ext_csd;
516 int err;
517
f39b2dd9
PR		 518 if (bus_width == MMC_BUS_WIDTH_1)
519 return 0;
520
08ee80cc 521 err = mmc_get_ext_csd(card, &bw_ext_csd);
08ee80cc 522
f39b2dd9 523 if (err || bw_ext_csd == NULL) {
08ee80cc
PR		 524 if (bus_width != MMC_BUS_WIDTH_1)
525 err = -EINVAL;
526 goto out;
527 }
528
529 if (bus_width == MMC_BUS_WIDTH_1)
530 goto out;
531
532 /* only compare read only fields */
f39b2dd9 533 err = (!(card->ext_csd.raw_partition_support ==
08ee80cc 534 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
f39b2dd9 535 (card->ext_csd.raw_erased_mem_count ==
08ee80cc 536 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
f39b2dd9 537 (card->ext_csd.rev ==
08ee80cc 538 bw_ext_csd[EXT_CSD_REV]) &&
f39b2dd9 539 (card->ext_csd.raw_ext_csd_structure ==
08ee80cc 540 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
f39b2dd9 541 (card->ext_csd.raw_card_type ==
08ee80cc 542 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
f39b2dd9 543 (card->ext_csd.raw_s_a_timeout ==
08ee80cc 544 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
f39b2dd9 545 (card->ext_csd.raw_hc_erase_gap_size ==
08ee80cc 546 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
f39b2dd9 547 (card->ext_csd.raw_erase_timeout_mult ==
08ee80cc 548 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
f39b2dd9 549 (card->ext_csd.raw_hc_erase_grp_size ==
08ee80cc 550 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
f39b2dd9 551 (card->ext_csd.raw_sec_trim_mult ==
08ee80cc 552 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
f39b2dd9 553 (card->ext_csd.raw_sec_erase_mult ==
08ee80cc 554 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
f39b2dd9 555 (card->ext_csd.raw_sec_feature_support ==
08ee80cc 556 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
f39b2dd9 557 (card->ext_csd.raw_trim_mult ==
08ee80cc 558 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
f39b2dd9
PR		 559 (card->ext_csd.raw_sectors[0] ==
560 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
561 (card->ext_csd.raw_sectors[1] ==
562 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
563 (card->ext_csd.raw_sectors[2] ==
564 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
565 (card->ext_csd.raw_sectors[3] ==
566 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
08ee80cc
PR		 567 if (err)
568 err = -EINVAL;
569
570out:
571 mmc_free_ext_csd(bw_ext_csd);
7ea239d9
PO		 572 return err;
573}
574
51ec92e2
PO		 575MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
576 card->raw_cid[2], card->raw_cid[3]);
577MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
578 card->raw_csd[2], card->raw_csd[3]);
579MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
dfe86cba
AH		 580MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
581MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
51ec92e2
PO		 582MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
583MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
584MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
585MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
586MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
587MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
709de99d
CD		 588MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
589 card->ext_csd.enhanced_area_offset);
590MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
51ec92e2
PO		 591
592static struct attribute *mmc_std_attrs[] = {
593 &dev_attr_cid.attr,
594 &dev_attr_csd.attr,
595 &dev_attr_date.attr,
dfe86cba
AH		 596 &dev_attr_erase_size.attr,
597 &dev_attr_preferred_erase_size.attr,
51ec92e2
PO		 598 &dev_attr_fwrev.attr,
599 &dev_attr_hwrev.attr,
600 &dev_attr_manfid.attr,
601 &dev_attr_name.attr,
602 &dev_attr_oemid.attr,
603 &dev_attr_serial.attr,
709de99d
CD		 604 &dev_attr_enhanced_area_offset.attr,
605 &dev_attr_enhanced_area_size.attr,
51ec92e2
PO		 606 NULL,
607};
608
609static struct attribute_group mmc_std_attr_group = {
610 .attrs = mmc_std_attrs,
611};
612
a4dbd674 613static const struct attribute_group *mmc_attr_groups[] = {
51ec92e2
PO		 614 &mmc_std_attr_group,
615 NULL,
616};
617
618static struct device_type mmc_type = {
619 .groups = mmc_attr_groups,
620};
621
b87d8dbf
G		 622/*
623 * Select the PowerClass for the current bus width
624 * If power class is defined for 4/8 bit bus in the
625 * extended CSD register, select it by executing the
626 * mmc_switch command.
627 */
628static int mmc_select_powerclass(struct mmc_card *card,
629 unsigned int bus_width, u8 *ext_csd)
630{
631 int err = 0;
632 unsigned int pwrclass_val;
633 unsigned int index = 0;
634 struct mmc_host *host;
635
636 BUG_ON(!card);
637
638 host = card->host;
639 BUG_ON(!host);
640
641 if (ext_csd == NULL)
642 return 0;
643
644 /* Power class selection is supported for versions >= 4.0 */
645 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
646 return 0;
647
648 /* Power class values are defined only for 4/8 bit bus */
649 if (bus_width == EXT_CSD_BUS_WIDTH_1)
650 return 0;
651
652 switch (1 << host->ios.vdd) {
653 case MMC_VDD_165_195:
654 if (host->ios.clock <= 26000000)
655 index = EXT_CSD_PWR_CL_26_195;
656 else if (host->ios.clock <= 52000000)
657 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
658 EXT_CSD_PWR_CL_52_195 :
659 EXT_CSD_PWR_CL_DDR_52_195;
660 else if (host->ios.clock <= 200000000)
661 index = EXT_CSD_PWR_CL_200_195;
662 break;
663 case MMC_VDD_32_33:
664 case MMC_VDD_33_34:
665 case MMC_VDD_34_35:
666 case MMC_VDD_35_36:
667 if (host->ios.clock <= 26000000)
668 index = EXT_CSD_PWR_CL_26_360;
669 else if (host->ios.clock <= 52000000)
670 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
671 EXT_CSD_PWR_CL_52_360 :
672 EXT_CSD_PWR_CL_DDR_52_360;
673 else if (host->ios.clock <= 200000000)
674 index = EXT_CSD_PWR_CL_200_360;
675 break;
676 default:
677 pr_warning("%s: Voltage range not supported "
678 "for power class.\n", mmc_hostname(host));
679 return -EINVAL;
680 }
681
682 pwrclass_val = ext_csd[index];
683
684 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
685 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
686 EXT_CSD_PWR_CL_8BIT_SHIFT;
687 else
688 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
689 EXT_CSD_PWR_CL_4BIT_SHIFT;
690
691 /* If the power class is different from the default value */
692 if (pwrclass_val > 0) {
693 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
694 EXT_CSD_POWER_CLASS,
695 pwrclass_val,
71fe3eb0 696 card->ext_csd.generic_cmd6_time);
b87d8dbf
G		 697 }
698
699 return err;
700}
701
7ea239d9 702/*
6abaa0c9
PO		 703 * Handle the detection and initialisation of a card.
704 *
8769392b 705 * In the case of a resume, "oldcard" will contain the card
6abaa0c9 706 * we're trying to reinitialise.
7ea239d9 707 */
8c75deae 708static int mmc_init_card(struct mmc_host *host, u32 ocr,
6abaa0c9 709 struct mmc_card *oldcard)
7ea239d9
PO		 710{
711 struct mmc_card *card;
25d5c699 712 int err, ddr = 0;
7ea239d9
PO		 713 u32 cid[4];
714 unsigned int max_dtr;
b676f039 715 u32 rocr;
08ee80cc 716 u8 *ext_csd = NULL;
7ea239d9
PO		 717
718 BUG_ON(!host);
d84075c8 719 WARN_ON(!host->claimed);
7ea239d9 720
44669034
SNX		 721 /* Set correct bus mode for MMC before attempting init */
722 if (!mmc_host_is_spi(host))
723 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
724
7ea239d9
PO		 725 /*
726 * Since we're changing the OCR value, we seem to
727 * need to tell some cards to go back to the idle
728 * state. We wait 1ms to give cards time to
729 * respond.
c3805467 730 * mmc_go_idle is needed for eMMC that are asleep
7ea239d9
PO		 731 */
732 mmc_go_idle(host);
733
734 /* The extra bit indicates that we support high capacity */
b676f039 735 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
17b0429d 736 if (err)
6abaa0c9 737 goto err;
7ea239d9 738
af517150
DB		 739 /*
740 * For SPI, enable CRC as appropriate.
741 */
742 if (mmc_host_is_spi(host)) {
743 err = mmc_spi_set_crc(host, use_spi_crc);
744 if (err)
745 goto err;
746 }
747
7ea239d9
PO		 748 /*
749 * Fetch CID from card.
750 */
af517150
DB		 751 if (mmc_host_is_spi(host))
752 err = mmc_send_cid(host, cid);
753 else
754 err = mmc_all_send_cid(host, cid);
17b0429d 755 if (err)
7ea239d9
PO		 756 goto err;
757
6abaa0c9 758 if (oldcard) {
adf66a0d
PO		 759 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
760 err = -ENOENT;
6abaa0c9 761 goto err;
adf66a0d 762 }
6abaa0c9
PO		 763
764 card = oldcard;
765 } else {
766 /*
767 * Allocate card structure.
768 */
51ec92e2 769 card = mmc_alloc_card(host, &mmc_type);
adf66a0d
PO		 770 if (IS_ERR(card)) {
771 err = PTR_ERR(card);
6abaa0c9 772 goto err;
adf66a0d 773 }
7ea239d9 774
6abaa0c9
PO		 775 card->type = MMC_TYPE_MMC;
776 card->rca = 1;
777 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
778 }
7ea239d9
PO		 779
780 /*
af517150 781 * For native busses: set card RCA and quit open drain mode.
7ea239d9 782 */
af517150
DB		 783 if (!mmc_host_is_spi(host)) {
784 err = mmc_set_relative_addr(card);
785 if (err)
786 goto free_card;
7ea239d9 787
af517150
DB		 788 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
789 }
7ea239d9 790
6abaa0c9
PO		 791 if (!oldcard) {
792 /*
793 * Fetch CSD from card.
794 */
795 err = mmc_send_csd(card, card->raw_csd);
17b0429d 796 if (err)
6abaa0c9 797 goto free_card;
7ea239d9 798
bd766312 799 err = mmc_decode_csd(card);
adf66a0d 800 if (err)
bd766312
PO		 801 goto free_card;
802 err = mmc_decode_cid(card);
adf66a0d 803 if (err)
bd766312 804 goto free_card;
6abaa0c9 805 }
7ea239d9
PO		 806
807 /*
89a73cf5 808 * Select card, as all following commands rely on that.
7ea239d9 809 */
af517150
DB		 810 if (!mmc_host_is_spi(host)) {
811 err = mmc_select_card(card);
812 if (err)
813 goto free_card;
814 }
7ea239d9 815
6abaa0c9
PO		 816 if (!oldcard) {
817 /*
af517150 818 * Fetch and process extended CSD.
6abaa0c9 819 */
08ee80cc
PR		 820
821 err = mmc_get_ext_csd(card, &ext_csd);
822 if (err)
823 goto free_card;
824 err = mmc_read_ext_csd(card, ext_csd);
17b0429d 825 if (err)
6abaa0c9 826 goto free_card;
b676f039
PR		 827
828 /* If doing byte addressing, check if required to do sector
829 * addressing. Handle the case of <2GB cards needing sector
830 * addressing. See section 8.1 JEDEC Standard JED84-A441;
831 * ocr register has bit 30 set for sector addressing.
832 */
833 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
834 mmc_card_set_blockaddr(card);
835
dfe86cba
AH		 836 /* Erase size depends on CSD and Extended CSD */
837 mmc_set_erase_size(card);
6abaa0c9 838 }
7ea239d9 839
709de99d
CD		 840 /*
841 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
25985edc 842 * bit. This bit will be lost every time after a reset or power off.
709de99d
CD		 843 */
844 if (card->ext_csd.enhanced_area_en) {
845 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
b23cf0bd
SJ		 846 EXT_CSD_ERASE_GROUP_DEF, 1,
847 card->ext_csd.generic_cmd6_time);
709de99d
CD		 848
849 if (err && err != -EBADMSG)
850 goto free_card;
851
852 if (err) {
853 err = 0;
854 /*
855 * Just disable enhanced area off & sz
856 * will try to enable ERASE_GROUP_DEF
857 * during next time reinit
858 */
859 card->ext_csd.enhanced_area_offset = -EINVAL;
860 card->ext_csd.enhanced_area_size = -EINVAL;
861 } else {
862 card->ext_csd.erase_group_def = 1;
863 /*
864 * enable ERASE_GRP_DEF successfully.
865 * This will affect the erase size, so
866 * here need to reset erase size
867 */
868 mmc_set_erase_size(card);
869 }
870 }
871
41e2a489
PR		 872 /*
873 * Ensure eMMC user default partition is enabled
874 */
371a689f
AW		 875 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
876 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
877 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
878 card->ext_csd.part_config,
879 card->ext_csd.part_time);
880 if (err && err != -EBADMSG)
881 goto free_card;
41e2a489
PR		 882 }
883
bec8726a
G		 884 /*
885 * If the host supports the power_off_notify capability then
886 * set the notification byte in the ext_csd register of device
887 */
888 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
a80f1627 889 (card->ext_csd.rev >= 6)) {
bec8726a
G		 890 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
891 EXT_CSD_POWER_OFF_NOTIFICATION,
892 EXT_CSD_POWER_ON,
893 card->ext_csd.generic_cmd6_time);
894 if (err && err != -EBADMSG)
895 goto free_card;
bec8726a 896
96a85d54
G		 897 /*
898 * The err can be -EBADMSG or 0,
899 * so check for success and update the flag
900 */
901 if (!err)
902 card->poweroff_notify_state = MMC_POWERED_ON;
903 }
bec8726a 904
89a73cf5
PO		 905 /*
906 * Activate high speed (if supported)
907 */
908 if ((card->ext_csd.hs_max_dtr != 0) &&
909 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
910 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
b23cf0bd
SJ		 911 EXT_CSD_HS_TIMING, 1,
912 card->ext_csd.generic_cmd6_time);
ef0b27d4 913 if (err && err != -EBADMSG)
89a73cf5
PO		 914 goto free_card;
915
ef0b27d4 916 if (err) {
a3c76eb9 917 pr_warning("%s: switch to highspeed failed\n",
ef0b27d4
AH		 918 mmc_hostname(card->host));
919 err = 0;
920 } else {
921 mmc_card_set_highspeed(card);
922 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
923 }
89a73cf5
PO		 924 }
925
eb0d8f13
JC		 926 /*
927 * Enable HPI feature (if supported)
928 */
929 if (card->ext_csd.hpi) {
930 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
931 EXT_CSD_HPI_MGMT, 1, 0);
932 if (err && err != -EBADMSG)
933 goto free_card;
934 if (err) {
935 pr_warning("%s: Enabling HPI failed\n",
936 mmc_hostname(card->host));
937 err = 0;
938 } else
939 card->ext_csd.hpi_en = 1;
940 }
941
7ea239d9
PO		 942 /*
943 * Compute bus speed.
944 */
945 max_dtr = (unsigned int)-1;
946
947 if (mmc_card_highspeed(card)) {
948 if (max_dtr > card->ext_csd.hs_max_dtr)
949 max_dtr = card->ext_csd.hs_max_dtr;
950 } else if (max_dtr > card->csd.max_dtr) {
951 max_dtr = card->csd.max_dtr;
952 }
953
954 mmc_set_clock(host, max_dtr);
955
dfc13e84 956 /*
0f8d8ea6 957 * Indicate DDR mode (if supported).
dfc13e84
HP		 958 */
959 if (mmc_card_highspeed(card)) {
960 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
4c4cb171
PR		 961 && ((host->caps & (MMC_CAP_1_8V_DDR |
962 MMC_CAP_UHS_DDR50))
963 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 964 ddr = MMC_1_8V_DDR_MODE;
dfc13e84 965 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
4c4cb171
PR		 966 && ((host->caps & (MMC_CAP_1_2V_DDR |
967 MMC_CAP_UHS_DDR50))
968 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 969 ddr = MMC_1_2V_DDR_MODE;
dfc13e84
HP		 970 }
971
89a73cf5 972 /*
0f8d8ea6 973 * Activate wide bus and DDR (if supported).
89a73cf5
PO		 974 */
975 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
b30f8af3 976 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
22113efd
AL		 977 static unsigned ext_csd_bits[][2] = {
978 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
979 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
980 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
981 };
982 static unsigned bus_widths[] = {
983 MMC_BUS_WIDTH_8,
984 MMC_BUS_WIDTH_4,
985 MMC_BUS_WIDTH_1
986 };
987 unsigned idx, bus_width = 0;
988
989 if (host->caps & MMC_CAP_8_BIT_DATA)
990 idx = 0;
991 else
992 idx = 1;
993 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
994 bus_width = bus_widths[idx];
995 if (bus_width == MMC_BUS_WIDTH_1)
996 ddr = 0; /* no DDR for 1-bit width */
b87d8dbf
G		 997 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
998 ext_csd);
999 if (err)
1000 pr_err("%s: power class selection to "
1001 "bus width %d failed\n",
1002 mmc_hostname(card->host),
1003 1 << bus_width);
1004
22113efd
AL		 1005 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1006 EXT_CSD_BUS_WIDTH,
d3a8d95d 1007 ext_csd_bits[idx][0],
b23cf0bd 1008 card->ext_csd.generic_cmd6_time);
22113efd 1009 if (!err) {
4c4cb171 1010 mmc_set_bus_width(card->host, bus_width);
08ee80cc 1011
22113efd
AL		 1012 /*
1013 * If controller can't handle bus width test,
08ee80cc
PR		 1014 * compare ext_csd previously read in 1 bit mode
1015 * against ext_csd at new bus width
22113efd
AL		 1016 */
1017 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
08ee80cc 1018 err = mmc_compare_ext_csds(card,
08ee80cc
PR		 1019 bus_width);
1020 else
1021 err = mmc_bus_test(card, bus_width);
22113efd
AL		 1022 if (!err)
1023 break;
1024 }
b30f8af3
JL		 1025 }
1026
22113efd 1027 if (!err && ddr) {
b87d8dbf
G		 1028 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1029 ext_csd);
1030 if (err)
1031 pr_err("%s: power class selection to "
1032 "bus width %d ddr %d failed\n",
1033 mmc_hostname(card->host),
1034 1 << bus_width, ddr);
1035
22113efd 1036 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d
AW		 1037 EXT_CSD_BUS_WIDTH,
1038 ext_csd_bits[idx][1],
b23cf0bd 1039 card->ext_csd.generic_cmd6_time);
22113efd 1040 }
ef0b27d4 1041 if (err) {
a3c76eb9 1042 pr_warning("%s: switch to bus width %d ddr %d "
22113efd
AL		 1043 "failed\n", mmc_hostname(card->host),
1044 1 << bus_width, ddr);
1045 goto free_card;
1046 } else if (ddr) {
4c4cb171
PR		 1047 /*
1048 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1049 * signaling.
1050 *
1051 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1052 *
1053 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1054 * in the JEDEC spec for DDR.
1055 *
1056 * Do not force change in vccq since we are obviously
1057 * working and no change to vccq is needed.
1058 *
1059 * WARNING: eMMC rules are NOT the same as SD DDR
1060 */
1061 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
1062 err = mmc_set_signal_voltage(host,
1063 MMC_SIGNAL_VOLTAGE_120, 0);
1064 if (err)
1065 goto err;
1066 }
22113efd 1067 mmc_card_set_ddr_mode(card);
4c4cb171
PR		 1068 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1069 mmc_set_bus_width(card->host, bus_width);
ef0b27d4 1070 }
89a73cf5
PO		 1071 }
1072
881d1c25
SJ		 1073 /*
1074 * If cache size is higher than 0, this indicates
1075 * the existence of cache and it can be turned on.
1076 */
1077 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1078 card->ext_csd.cache_size > 0) {
1079 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1080 EXT_CSD_CACHE_CTRL, 1, 0);
1081 if (err && err != -EBADMSG)
1082 goto free_card;
1083
1084 /*
1085 * Only if no error, cache is turned on successfully.
1086 */
1087 card->ext_csd.cache_ctrl = err ? 0 : 1;
1088 }
1089
6abaa0c9
PO		 1090 if (!oldcard)
1091 host->card = card;
1092
08ee80cc 1093 mmc_free_ext_csd(ext_csd);
17b0429d 1094 return 0;
6abaa0c9
PO		 1095
1096free_card:
1097 if (!oldcard)
1098 mmc_remove_card(card);
1099err:
08ee80cc 1100 mmc_free_ext_csd(ext_csd);
6abaa0c9 1101
adf66a0d 1102 return err;
6abaa0c9
PO		 1103}
1104
1105/*
1106 * Host is being removed. Free up the current card.
1107 */
1108static void mmc_remove(struct mmc_host *host)
1109{
1110 BUG_ON(!host);
1111 BUG_ON(!host->card);
1112
1113 mmc_remove_card(host->card);
1114 host->card = NULL;
1115}
1116
d3049504
AH		 1117/*
1118 * Card detection - card is alive.
1119 */
1120static int mmc_alive(struct mmc_host *host)
1121{
1122 return mmc_send_status(host->card, NULL);
1123}
1124
6abaa0c9
PO		 1125/*
1126 * Card detection callback from host.
1127 */
1128static void mmc_detect(struct mmc_host *host)
1129{
1130 int err;
1131
1132 BUG_ON(!host);
1133 BUG_ON(!host->card);
1134
1135 mmc_claim_host(host);
1136
1137 /*
1138 * Just check if our card has been removed.
1139 */
d3049504 1140 err = _mmc_detect_card_removed(host);
6abaa0c9
PO		 1141
1142 mmc_release_host(host);
1143
17b0429d 1144 if (err) {
4101c16a 1145 mmc_remove(host);
6abaa0c9
PO		 1146
1147 mmc_claim_host(host);
1148 mmc_detach_bus(host);
7f7e4129 1149 mmc_power_off(host);
6abaa0c9
PO		 1150 mmc_release_host(host);
1151 }
1152}
1153
6abaa0c9
PO		 1154/*
1155 * Suspend callback from host.
1156 */
95cdfb72 1157static int mmc_suspend(struct mmc_host *host)
6abaa0c9 1158{
c3805467
B		 1159 int err = 0;
1160
6abaa0c9
PO		 1161 BUG_ON(!host);
1162 BUG_ON(!host->card);
7ea239d9 1163
6abaa0c9 1164 mmc_claim_host(host);
c3805467
B		 1165 if (mmc_card_can_sleep(host))
1166 err = mmc_card_sleep(host);
1167 else if (!mmc_host_is_spi(host))
af517150 1168 mmc_deselect_cards(host);
6abaa0c9 1169 host->card->state &= ~MMC_STATE_HIGHSPEED;
7ea239d9 1170 mmc_release_host(host);
95cdfb72 1171
c3805467 1172 return err;
6abaa0c9 1173}
7ea239d9 1174
6abaa0c9
PO		 1175/*
1176 * Resume callback from host.
1177 *
1178 * This function tries to determine if the same card is still present
1179 * and, if so, restore all state to it.
1180 */
95cdfb72 1181static int mmc_resume(struct mmc_host *host)
6abaa0c9
PO		 1182{
1183 int err;
1184
1185 BUG_ON(!host);
1186 BUG_ON(!host->card);
1187
1188 mmc_claim_host(host);
8c75deae 1189 err = mmc_init_card(host, host->ocr, host->card);
2986d0bf
PO		 1190 mmc_release_host(host);
1191
95cdfb72 1192 return err;
6abaa0c9
PO		 1193}
1194
12ae637f 1195static int mmc_power_restore(struct mmc_host *host)
eae1aeee 1196{
12ae637f
OBC		 1197 int ret;
1198
eae1aeee
AH		 1199 host->card->state &= ~MMC_STATE_HIGHSPEED;
1200 mmc_claim_host(host);
12ae637f 1201 ret = mmc_init_card(host, host->ocr, host->card);
eae1aeee 1202 mmc_release_host(host);
12ae637f
OBC		 1203
1204 return ret;
eae1aeee
AH		 1205}
1206
b1ebe384
JL		 1207static int mmc_sleep(struct mmc_host *host)
1208{
1209 struct mmc_card *card = host->card;
1210 int err = -ENOSYS;
1211
1212 if (card && card->ext_csd.rev >= 3) {
1213 err = mmc_card_sleepawake(host, 1);
1214 if (err < 0)
1215 pr_debug("%s: Error %d while putting card into sleep",
1216 mmc_hostname(host), err);
1217 }
1218
1219 return err;
1220}
1221
1222static int mmc_awake(struct mmc_host *host)
1223{
1224 struct mmc_card *card = host->card;
1225 int err = -ENOSYS;
1226
1227 if (card && card->ext_csd.rev >= 3) {
1228 err = mmc_card_sleepawake(host, 0);
1229 if (err < 0)
1230 pr_debug("%s: Error %d while awaking sleeping card",
1231 mmc_hostname(host), err);
1232 }
1233
1234 return err;
1235}
1236
6abaa0c9 1237static const struct mmc_bus_ops mmc_ops = {
b1ebe384
JL		 1238 .awake = mmc_awake,
1239 .sleep = mmc_sleep,
9feae246
AH		 1240 .remove = mmc_remove,
1241 .detect = mmc_detect,
1242 .suspend = NULL,
1243 .resume = NULL,
eae1aeee 1244 .power_restore = mmc_power_restore,
d3049504 1245 .alive = mmc_alive,
9feae246
AH		 1246};
1247
1248static const struct mmc_bus_ops mmc_ops_unsafe = {
b1ebe384
JL		 1249 .awake = mmc_awake,
1250 .sleep = mmc_sleep,
6abaa0c9
PO		 1251 .remove = mmc_remove,
1252 .detect = mmc_detect,
1253 .suspend = mmc_suspend,
1254 .resume = mmc_resume,
eae1aeee 1255 .power_restore = mmc_power_restore,
d3049504 1256 .alive = mmc_alive,
6abaa0c9
PO		 1257};
1258
9feae246
AH		 1259static void mmc_attach_bus_ops(struct mmc_host *host)
1260{
1261 const struct mmc_bus_ops *bus_ops;
1262
71d7d3d1 1263 if (!mmc_card_is_removable(host))
9feae246
AH		 1264 bus_ops = &mmc_ops_unsafe;
1265 else
1266 bus_ops = &mmc_ops;
1267 mmc_attach_bus(host, bus_ops);
1268}
1269
6abaa0c9
PO		 1270/*
1271 * Starting point for MMC card init.
1272 */
807e8e40 1273int mmc_attach_mmc(struct mmc_host *host)
6abaa0c9
PO		 1274{
1275 int err;
807e8e40 1276 u32 ocr;
6abaa0c9
PO		 1277
1278 BUG_ON(!host);
d84075c8 1279 WARN_ON(!host->claimed);
6abaa0c9 1280
44669034
SNX		 1281 /* Set correct bus mode for MMC before attempting attach */
1282 if (!mmc_host_is_spi(host))
1283 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1284
807e8e40
AR		 1285 err = mmc_send_op_cond(host, 0, &ocr);
1286 if (err)
1287 return err;
1288
9feae246 1289 mmc_attach_bus_ops(host);
8f230f45
TI		 1290 if (host->ocr_avail_mmc)
1291 host->ocr_avail = host->ocr_avail_mmc;
6abaa0c9 1292
af517150
DB		 1293 /*
1294 * We need to get OCR a different way for SPI.
1295 */
1296 if (mmc_host_is_spi(host)) {
1297 err = mmc_spi_read_ocr(host, 1, &ocr);
1298 if (err)
1299 goto err;
1300 }
1301
6abaa0c9
PO		 1302 /*
1303 * Sanity check the voltages that the card claims to
1304 * support.
1305 */
1306 if (ocr & 0x7F) {
a3c76eb9 1307 pr_warning("%s: card claims to support voltages "
6abaa0c9
PO		 1308 "below the defined range. These will be ignored.\n",
1309 mmc_hostname(host));
1310 ocr &= ~0x7F;
1311 }
1312
1313 host->ocr = mmc_select_voltage(host, ocr);
1314
1315 /*
1316 * Can we support the voltage of the card?
1317 */
109b5bed
PO		 1318 if (!host->ocr) {
1319 err = -EINVAL;
6abaa0c9 1320 goto err;
109b5bed 1321 }
6abaa0c9
PO		 1322
1323 /*
1324 * Detect and init the card.
1325 */
8c75deae 1326 err = mmc_init_card(host, host->ocr, NULL);
17b0429d 1327 if (err)
6abaa0c9
PO		 1328 goto err;
1329
1330 mmc_release_host(host);
4101c16a 1331 err = mmc_add_card(host->card);
807e8e40 1332 mmc_claim_host(host);
7ea239d9 1333 if (err)
2986d0bf 1334 goto remove_card;
7ea239d9
PO		 1335
1336 return 0;
1337
2986d0bf 1338remove_card:
807e8e40 1339 mmc_release_host(host);
6abaa0c9 1340 mmc_remove_card(host->card);
2986d0bf 1341 mmc_claim_host(host);
807e8e40 1342 host->card = NULL;
7ea239d9
PO		 1343err:
1344 mmc_detach_bus(host);
7ea239d9 1345
a3c76eb9 1346 pr_err("%s: error %d whilst initialising MMC card\n",
109b5bed
PO		 1347 mmc_hostname(host), err);
1348
adf66a0d 1349 return err;
7ea239d9 1350}
Linux 6.x block layer and io_uring tree(s)