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