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mmc: core: ext_csd.raw_* used in comparison but never set
[thirdparty/kernel/stable.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:
facba917 104 printk(KERN_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) {
facba917 138 printk(KERN_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) {
198 printk(KERN_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)) {
220 printk(KERN_ERR "%s: unable to read EXT_CSD "
221 "on a possible high capacity card. "
222 "Card will be ignored.\n",
223 mmc_hostname(card->host));
224 } else {
225 printk(KERN_WARNING "%s: unable to read "
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{
242 int err = 0;
243
244 BUG_ON(!card);
245
246 if (!ext_csd)
247 return 0;
7ea239d9 248
6da24b78 249 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
f39b2dd9 250 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
6da24b78 251 if (card->csd.structure == 3) {
f39b2dd9 252 if (card->ext_csd.raw_ext_csd_structure > 2) {
6da24b78
KP		 253 printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
254 "version %d\n", mmc_hostname(card->host),
f39b2dd9 255 card->ext_csd.raw_ext_csd_structure);
6da24b78
KP		 256 err = -EINVAL;
257 goto out;
258 }
259 }
260
b1ebe384 261 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
38ca2850 262 if (card->ext_csd.rev > 6) {
6da24b78
KP		 263 printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
264 mmc_hostname(card->host), card->ext_csd.rev);
00cedfa6
FM		 265 err = -EINVAL;
266 goto out;
d7604d76
PO		 267 }
268
f39b2dd9
PR		 269 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
270 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
271 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
272 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
b1ebe384 273 if (card->ext_csd.rev >= 2) {
d7604d76
PO		 274 card->ext_csd.sectors =
275 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
276 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
277 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
278 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
fc8a0985
HP		 279
280 /* Cards with density > 2GiB are sector addressed */
281 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
d7604d76
PO		 282 mmc_card_set_blockaddr(card);
283 }
f39b2dd9 284 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
7198f3c9 285 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
dfc13e84
HP		 286 case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
287 EXT_CSD_CARD_TYPE_26:
288 card->ext_csd.hs_max_dtr = 52000000;
289 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
290 break;
291 case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
292 EXT_CSD_CARD_TYPE_26:
293 card->ext_csd.hs_max_dtr = 52000000;
294 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
295 break;
296 case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
297 EXT_CSD_CARD_TYPE_26:
298 card->ext_csd.hs_max_dtr = 52000000;
299 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
300 break;
7ea239d9
PO		 301 case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
302 card->ext_csd.hs_max_dtr = 52000000;
303 break;
304 case EXT_CSD_CARD_TYPE_26:
305 card->ext_csd.hs_max_dtr = 26000000;
306 break;
307 default:
308 /* MMC v4 spec says this cannot happen */
309 printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
310 "support any high-speed modes.\n",
311 mmc_hostname(card->host));
7ea239d9
PO		 312 }
313
f39b2dd9
PR		 314 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
315 card->ext_csd.raw_erase_timeout_mult =
316 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
317 card->ext_csd.raw_hc_erase_grp_size =
318 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
b1ebe384
JL		 319 if (card->ext_csd.rev >= 3) {
320 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
371a689f
AW		 321 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
322
323 /* EXT_CSD value is in units of 10ms, but we store in ms */
324 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
b1ebe384
JL		 325
326 /* Sleep / awake timeout in 100ns units */
327 if (sa_shift > 0 && sa_shift <= 0x17)
328 card->ext_csd.sa_timeout =
329 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
dfe86cba
AH		 330 card->ext_csd.erase_group_def =
331 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
332 card->ext_csd.hc_erase_timeout = 300 *
333 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
334 card->ext_csd.hc_erase_size =
335 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
f4c5522b
AW		 336
337 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
371a689f
AW		 338
339 /*
340 * There are two boot regions of equal size, defined in
341 * multiples of 128K.
342 */
343 card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
dfe86cba
AH		 344 }
345
f39b2dd9
PR		 346 card->ext_csd.raw_hc_erase_gap_size =
347 ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
348 card->ext_csd.raw_sec_trim_mult =
349 ext_csd[EXT_CSD_SEC_TRIM_MULT];
350 card->ext_csd.raw_sec_erase_mult =
351 ext_csd[EXT_CSD_SEC_ERASE_MULT];
352 card->ext_csd.raw_sec_feature_support =
353 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
354 card->ext_csd.raw_trim_mult =
355 ext_csd[EXT_CSD_TRIM_MULT];
dfe86cba 356 if (card->ext_csd.rev >= 4) {
709de99d
CD		 357 /*
358 * Enhanced area feature support -- check whether the eMMC
359 * card has the Enhanced area enabled. If so, export enhanced
360 * area offset and size to user by adding sysfs interface.
361 */
5238acbe 362 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
709de99d 363 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
f39b2dd9 364 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
709de99d
CD		 365 u8 hc_erase_grp_sz =
366 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
367 u8 hc_wp_grp_sz =
368 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
369
370 card->ext_csd.enhanced_area_en = 1;
371 /*
372 * calculate the enhanced data area offset, in bytes
373 */
374 card->ext_csd.enhanced_area_offset =
375 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
376 (ext_csd[137] << 8) + ext_csd[136];
377 if (mmc_card_blockaddr(card))
378 card->ext_csd.enhanced_area_offset <<= 9;
379 /*
380 * calculate the enhanced data area size, in kilobytes
381 */
382 card->ext_csd.enhanced_area_size =
383 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
384 ext_csd[140];
385 card->ext_csd.enhanced_area_size *=
386 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
387 card->ext_csd.enhanced_area_size <<= 9;
388 } else {
389 /*
390 * If the enhanced area is not enabled, disable these
391 * device attributes.
392 */
393 card->ext_csd.enhanced_area_offset = -EINVAL;
394 card->ext_csd.enhanced_area_size = -EINVAL;
395 }
dfe86cba
AH		 396 card->ext_csd.sec_trim_mult =
397 ext_csd[EXT_CSD_SEC_TRIM_MULT];
398 card->ext_csd.sec_erase_mult =
399 ext_csd[EXT_CSD_SEC_ERASE_MULT];
400 card->ext_csd.sec_feature_support =
401 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
402 card->ext_csd.trim_timeout = 300 *
403 ext_csd[EXT_CSD_TRIM_MULT];
b1ebe384
JL		 404 }
405
b2499518 406 if (card->ext_csd.rev >= 5) {
f4c5522b 407 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
b2499518
AH		 408 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
409 }
f4c5522b 410
5238acbe 411 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
dfe86cba
AH		 412 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
413 card->erased_byte = 0xFF;
414 else
415 card->erased_byte = 0x0;
416
7ea239d9 417out:
08ee80cc
PR		 418 return err;
419}
420
421static inline void mmc_free_ext_csd(u8 *ext_csd)
422{
7ea239d9 423 kfree(ext_csd);
08ee80cc
PR		 424}
425
7ea239d9 426
f39b2dd9 427static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
08ee80cc
PR		 428{
429 u8 *bw_ext_csd;
430 int err;
431
f39b2dd9
PR		 432 if (bus_width == MMC_BUS_WIDTH_1)
433 return 0;
434
08ee80cc 435 err = mmc_get_ext_csd(card, &bw_ext_csd);
08ee80cc 436
f39b2dd9 437 if (err || bw_ext_csd == NULL) {
08ee80cc
PR		 438 if (bus_width != MMC_BUS_WIDTH_1)
439 err = -EINVAL;
440 goto out;
441 }
442
443 if (bus_width == MMC_BUS_WIDTH_1)
444 goto out;
445
446 /* only compare read only fields */
f39b2dd9 447 err = (!(card->ext_csd.raw_partition_support ==
08ee80cc 448 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
f39b2dd9 449 (card->ext_csd.raw_erased_mem_count ==
08ee80cc 450 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
f39b2dd9 451 (card->ext_csd.rev ==
08ee80cc 452 bw_ext_csd[EXT_CSD_REV]) &&
f39b2dd9 453 (card->ext_csd.raw_ext_csd_structure ==
08ee80cc 454 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
f39b2dd9 455 (card->ext_csd.raw_card_type ==
08ee80cc 456 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
f39b2dd9 457 (card->ext_csd.raw_s_a_timeout ==
08ee80cc 458 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
f39b2dd9 459 (card->ext_csd.raw_hc_erase_gap_size ==
08ee80cc 460 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
f39b2dd9 461 (card->ext_csd.raw_erase_timeout_mult ==
08ee80cc 462 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
f39b2dd9 463 (card->ext_csd.raw_hc_erase_grp_size ==
08ee80cc 464 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
f39b2dd9 465 (card->ext_csd.raw_sec_trim_mult ==
08ee80cc 466 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
f39b2dd9 467 (card->ext_csd.raw_sec_erase_mult ==
08ee80cc 468 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
f39b2dd9 469 (card->ext_csd.raw_sec_feature_support ==
08ee80cc 470 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
f39b2dd9 471 (card->ext_csd.raw_trim_mult ==
08ee80cc 472 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
f39b2dd9
PR		 473 (card->ext_csd.raw_sectors[0] ==
474 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
475 (card->ext_csd.raw_sectors[1] ==
476 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
477 (card->ext_csd.raw_sectors[2] ==
478 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
479 (card->ext_csd.raw_sectors[3] ==
480 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
08ee80cc
PR		 481 if (err)
482 err = -EINVAL;
483
484out:
485 mmc_free_ext_csd(bw_ext_csd);
7ea239d9
PO		 486 return err;
487}
488
51ec92e2
PO		 489MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
490 card->raw_cid[2], card->raw_cid[3]);
491MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
492 card->raw_csd[2], card->raw_csd[3]);
493MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
dfe86cba
AH		 494MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
495MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
51ec92e2
PO		 496MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
497MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
498MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
499MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
500MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
501MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
709de99d
CD		 502MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
503 card->ext_csd.enhanced_area_offset);
504MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
51ec92e2
PO		 505
506static struct attribute *mmc_std_attrs[] = {
507 &dev_attr_cid.attr,
508 &dev_attr_csd.attr,
509 &dev_attr_date.attr,
dfe86cba
AH		 510 &dev_attr_erase_size.attr,
511 &dev_attr_preferred_erase_size.attr,
51ec92e2
PO		 512 &dev_attr_fwrev.attr,
513 &dev_attr_hwrev.attr,
514 &dev_attr_manfid.attr,
515 &dev_attr_name.attr,
516 &dev_attr_oemid.attr,
517 &dev_attr_serial.attr,
709de99d
CD		 518 &dev_attr_enhanced_area_offset.attr,
519 &dev_attr_enhanced_area_size.attr,
51ec92e2
PO		 520 NULL,
521};
522
523static struct attribute_group mmc_std_attr_group = {
524 .attrs = mmc_std_attrs,
525};
526
a4dbd674 527static const struct attribute_group *mmc_attr_groups[] = {
51ec92e2
PO		 528 &mmc_std_attr_group,
529 NULL,
530};
531
532static struct device_type mmc_type = {
533 .groups = mmc_attr_groups,
534};
535
b87d8dbf
G		 536/*
537 * Select the PowerClass for the current bus width
538 * If power class is defined for 4/8 bit bus in the
539 * extended CSD register, select it by executing the
540 * mmc_switch command.
541 */
542static int mmc_select_powerclass(struct mmc_card *card,
543 unsigned int bus_width, u8 *ext_csd)
544{
545 int err = 0;
546 unsigned int pwrclass_val;
547 unsigned int index = 0;
548 struct mmc_host *host;
549
550 BUG_ON(!card);
551
552 host = card->host;
553 BUG_ON(!host);
554
555 if (ext_csd == NULL)
556 return 0;
557
558 /* Power class selection is supported for versions >= 4.0 */
559 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
560 return 0;
561
562 /* Power class values are defined only for 4/8 bit bus */
563 if (bus_width == EXT_CSD_BUS_WIDTH_1)
564 return 0;
565
566 switch (1 << host->ios.vdd) {
567 case MMC_VDD_165_195:
568 if (host->ios.clock <= 26000000)
569 index = EXT_CSD_PWR_CL_26_195;
570 else if (host->ios.clock <= 52000000)
571 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
572 EXT_CSD_PWR_CL_52_195 :
573 EXT_CSD_PWR_CL_DDR_52_195;
574 else if (host->ios.clock <= 200000000)
575 index = EXT_CSD_PWR_CL_200_195;
576 break;
577 case MMC_VDD_32_33:
578 case MMC_VDD_33_34:
579 case MMC_VDD_34_35:
580 case MMC_VDD_35_36:
581 if (host->ios.clock <= 26000000)
582 index = EXT_CSD_PWR_CL_26_360;
583 else if (host->ios.clock <= 52000000)
584 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
585 EXT_CSD_PWR_CL_52_360 :
586 EXT_CSD_PWR_CL_DDR_52_360;
587 else if (host->ios.clock <= 200000000)
588 index = EXT_CSD_PWR_CL_200_360;
589 break;
590 default:
591 pr_warning("%s: Voltage range not supported "
592 "for power class.\n", mmc_hostname(host));
593 return -EINVAL;
594 }
595
596 pwrclass_val = ext_csd[index];
597
598 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
599 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
600 EXT_CSD_PWR_CL_8BIT_SHIFT;
601 else
602 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
603 EXT_CSD_PWR_CL_4BIT_SHIFT;
604
605 /* If the power class is different from the default value */
606 if (pwrclass_val > 0) {
607 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
608 EXT_CSD_POWER_CLASS,
609 pwrclass_val,
610 0);
611 }
612
613 return err;
614}
615
7ea239d9 616/*
6abaa0c9
PO		 617 * Handle the detection and initialisation of a card.
618 *
8769392b 619 * In the case of a resume, "oldcard" will contain the card
6abaa0c9 620 * we're trying to reinitialise.
7ea239d9 621 */
8c75deae 622static int mmc_init_card(struct mmc_host *host, u32 ocr,
6abaa0c9 623 struct mmc_card *oldcard)
7ea239d9
PO		 624{
625 struct mmc_card *card;
25d5c699 626 int err, ddr = 0;
7ea239d9
PO		 627 u32 cid[4];
628 unsigned int max_dtr;
b676f039 629 u32 rocr;
08ee80cc 630 u8 *ext_csd = NULL;
7ea239d9
PO		 631
632 BUG_ON(!host);
d84075c8 633 WARN_ON(!host->claimed);
7ea239d9 634
44669034
SNX		 635 /* Set correct bus mode for MMC before attempting init */
636 if (!mmc_host_is_spi(host))
637 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
638
7ea239d9
PO		 639 /*
640 * Since we're changing the OCR value, we seem to
641 * need to tell some cards to go back to the idle
642 * state. We wait 1ms to give cards time to
643 * respond.
c3805467 644 * mmc_go_idle is needed for eMMC that are asleep
7ea239d9
PO		 645 */
646 mmc_go_idle(host);
647
648 /* The extra bit indicates that we support high capacity */
b676f039 649 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
17b0429d 650 if (err)
6abaa0c9 651 goto err;
7ea239d9 652
af517150
DB		 653 /*
654 * For SPI, enable CRC as appropriate.
655 */
656 if (mmc_host_is_spi(host)) {
657 err = mmc_spi_set_crc(host, use_spi_crc);
658 if (err)
659 goto err;
660 }
661
7ea239d9
PO		 662 /*
663 * Fetch CID from card.
664 */
af517150
DB		 665 if (mmc_host_is_spi(host))
666 err = mmc_send_cid(host, cid);
667 else
668 err = mmc_all_send_cid(host, cid);
17b0429d 669 if (err)
7ea239d9
PO		 670 goto err;
671
6abaa0c9 672 if (oldcard) {
adf66a0d
PO		 673 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
674 err = -ENOENT;
6abaa0c9 675 goto err;
adf66a0d 676 }
6abaa0c9
PO		 677
678 card = oldcard;
679 } else {
680 /*
681 * Allocate card structure.
682 */
51ec92e2 683 card = mmc_alloc_card(host, &mmc_type);
adf66a0d
PO		 684 if (IS_ERR(card)) {
685 err = PTR_ERR(card);
6abaa0c9 686 goto err;
adf66a0d 687 }
7ea239d9 688
6abaa0c9
PO		 689 card->type = MMC_TYPE_MMC;
690 card->rca = 1;
691 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
692 }
7ea239d9
PO		 693
694 /*
af517150 695 * For native busses: set card RCA and quit open drain mode.
7ea239d9 696 */
af517150
DB		 697 if (!mmc_host_is_spi(host)) {
698 err = mmc_set_relative_addr(card);
699 if (err)
700 goto free_card;
7ea239d9 701
af517150
DB		 702 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
703 }
7ea239d9 704
6abaa0c9
PO		 705 if (!oldcard) {
706 /*
707 * Fetch CSD from card.
708 */
709 err = mmc_send_csd(card, card->raw_csd);
17b0429d 710 if (err)
6abaa0c9 711 goto free_card;
7ea239d9 712
bd766312 713 err = mmc_decode_csd(card);
adf66a0d 714 if (err)
bd766312
PO		 715 goto free_card;
716 err = mmc_decode_cid(card);
adf66a0d 717 if (err)
bd766312 718 goto free_card;
6abaa0c9 719 }
7ea239d9
PO		 720
721 /*
89a73cf5 722 * Select card, as all following commands rely on that.
7ea239d9 723 */
af517150
DB		 724 if (!mmc_host_is_spi(host)) {
725 err = mmc_select_card(card);
726 if (err)
727 goto free_card;
728 }
7ea239d9 729
6abaa0c9
PO		 730 if (!oldcard) {
731 /*
af517150 732 * Fetch and process extended CSD.
6abaa0c9 733 */
08ee80cc
PR		 734
735 err = mmc_get_ext_csd(card, &ext_csd);
736 if (err)
737 goto free_card;
738 err = mmc_read_ext_csd(card, ext_csd);
17b0429d 739 if (err)
6abaa0c9 740 goto free_card;
b676f039
PR		 741
742 /* If doing byte addressing, check if required to do sector
743 * addressing. Handle the case of <2GB cards needing sector
744 * addressing. See section 8.1 JEDEC Standard JED84-A441;
745 * ocr register has bit 30 set for sector addressing.
746 */
747 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
748 mmc_card_set_blockaddr(card);
749
dfe86cba
AH		 750 /* Erase size depends on CSD and Extended CSD */
751 mmc_set_erase_size(card);
6abaa0c9 752 }
7ea239d9 753
709de99d
CD		 754 /*
755 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
25985edc 756 * bit. This bit will be lost every time after a reset or power off.
709de99d
CD		 757 */
758 if (card->ext_csd.enhanced_area_en) {
759 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 760 EXT_CSD_ERASE_GROUP_DEF, 1, 0);
709de99d
CD		 761
762 if (err && err != -EBADMSG)
763 goto free_card;
764
765 if (err) {
766 err = 0;
767 /*
768 * Just disable enhanced area off & sz
769 * will try to enable ERASE_GROUP_DEF
770 * during next time reinit
771 */
772 card->ext_csd.enhanced_area_offset = -EINVAL;
773 card->ext_csd.enhanced_area_size = -EINVAL;
774 } else {
775 card->ext_csd.erase_group_def = 1;
776 /*
777 * enable ERASE_GRP_DEF successfully.
778 * This will affect the erase size, so
779 * here need to reset erase size
780 */
781 mmc_set_erase_size(card);
782 }
783 }
784
41e2a489
PR		 785 /*
786 * Ensure eMMC user default partition is enabled
787 */
371a689f
AW		 788 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
789 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
790 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
791 card->ext_csd.part_config,
792 card->ext_csd.part_time);
793 if (err && err != -EBADMSG)
794 goto free_card;
41e2a489
PR		 795 }
796
89a73cf5
PO		 797 /*
798 * Activate high speed (if supported)
799 */
800 if ((card->ext_csd.hs_max_dtr != 0) &&
801 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
802 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 803 EXT_CSD_HS_TIMING, 1, 0);
ef0b27d4 804 if (err && err != -EBADMSG)
89a73cf5
PO		 805 goto free_card;
806
ef0b27d4
AH		 807 if (err) {
808 printk(KERN_WARNING "%s: switch to highspeed failed\n",
809 mmc_hostname(card->host));
810 err = 0;
811 } else {
812 mmc_card_set_highspeed(card);
813 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
814 }
89a73cf5
PO		 815 }
816
7ea239d9
PO		 817 /*
818 * Compute bus speed.
819 */
820 max_dtr = (unsigned int)-1;
821
822 if (mmc_card_highspeed(card)) {
823 if (max_dtr > card->ext_csd.hs_max_dtr)
824 max_dtr = card->ext_csd.hs_max_dtr;
825 } else if (max_dtr > card->csd.max_dtr) {
826 max_dtr = card->csd.max_dtr;
827 }
828
829 mmc_set_clock(host, max_dtr);
830
dfc13e84 831 /*
0f8d8ea6 832 * Indicate DDR mode (if supported).
dfc13e84
HP		 833 */
834 if (mmc_card_highspeed(card)) {
835 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
4c4cb171
PR		 836 && ((host->caps & (MMC_CAP_1_8V_DDR |
837 MMC_CAP_UHS_DDR50))
838 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 839 ddr = MMC_1_8V_DDR_MODE;
dfc13e84 840 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
4c4cb171
PR		 841 && ((host->caps & (MMC_CAP_1_2V_DDR |
842 MMC_CAP_UHS_DDR50))
843 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 844 ddr = MMC_1_2V_DDR_MODE;
dfc13e84
HP		 845 }
846
89a73cf5 847 /*
0f8d8ea6 848 * Activate wide bus and DDR (if supported).
89a73cf5
PO		 849 */
850 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
b30f8af3 851 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
22113efd
AL		 852 static unsigned ext_csd_bits[][2] = {
853 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
854 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
855 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
856 };
857 static unsigned bus_widths[] = {
858 MMC_BUS_WIDTH_8,
859 MMC_BUS_WIDTH_4,
860 MMC_BUS_WIDTH_1
861 };
862 unsigned idx, bus_width = 0;
863
864 if (host->caps & MMC_CAP_8_BIT_DATA)
865 idx = 0;
866 else
867 idx = 1;
868 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
869 bus_width = bus_widths[idx];
870 if (bus_width == MMC_BUS_WIDTH_1)
871 ddr = 0; /* no DDR for 1-bit width */
b87d8dbf
G		 872 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
873 ext_csd);
874 if (err)
875 pr_err("%s: power class selection to "
876 "bus width %d failed\n",
877 mmc_hostname(card->host),
878 1 << bus_width);
879
22113efd
AL		 880 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
881 EXT_CSD_BUS_WIDTH,
d3a8d95d
AW		 882 ext_csd_bits[idx][0],
883 0);
22113efd 884 if (!err) {
4c4cb171 885 mmc_set_bus_width(card->host, bus_width);
08ee80cc 886
22113efd
AL		 887 /*
888 * If controller can't handle bus width test,
08ee80cc
PR		 889 * compare ext_csd previously read in 1 bit mode
890 * against ext_csd at new bus width
22113efd
AL		 891 */
892 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
08ee80cc 893 err = mmc_compare_ext_csds(card,
08ee80cc
PR		 894 bus_width);
895 else
896 err = mmc_bus_test(card, bus_width);
22113efd
AL		 897 if (!err)
898 break;
899 }
b30f8af3
JL		 900 }
901
22113efd 902 if (!err && ddr) {
b87d8dbf
G		 903 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
904 ext_csd);
905 if (err)
906 pr_err("%s: power class selection to "
907 "bus width %d ddr %d failed\n",
908 mmc_hostname(card->host),
909 1 << bus_width, ddr);
910
22113efd 911 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d
AW		 912 EXT_CSD_BUS_WIDTH,
913 ext_csd_bits[idx][1],
914 0);
22113efd 915 }
ef0b27d4 916 if (err) {
0f8d8ea6 917 printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
22113efd
AL		 918 "failed\n", mmc_hostname(card->host),
919 1 << bus_width, ddr);
920 goto free_card;
921 } else if (ddr) {
4c4cb171
PR		 922 /*
923 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
924 * signaling.
925 *
926 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
927 *
928 * 1.8V vccq at 3.3V core voltage (vcc) is not required
929 * in the JEDEC spec for DDR.
930 *
931 * Do not force change in vccq since we are obviously
932 * working and no change to vccq is needed.
933 *
934 * WARNING: eMMC rules are NOT the same as SD DDR
935 */
936 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
937 err = mmc_set_signal_voltage(host,
938 MMC_SIGNAL_VOLTAGE_120, 0);
939 if (err)
940 goto err;
941 }
22113efd 942 mmc_card_set_ddr_mode(card);
4c4cb171
PR		 943 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
944 mmc_set_bus_width(card->host, bus_width);
ef0b27d4 945 }
89a73cf5
PO		 946 }
947
6abaa0c9
PO		 948 if (!oldcard)
949 host->card = card;
950
08ee80cc 951 mmc_free_ext_csd(ext_csd);
17b0429d 952 return 0;
6abaa0c9
PO		 953
954free_card:
955 if (!oldcard)
956 mmc_remove_card(card);
957err:
08ee80cc 958 mmc_free_ext_csd(ext_csd);
6abaa0c9 959
adf66a0d 960 return err;
6abaa0c9
PO		 961}
962
963/*
964 * Host is being removed. Free up the current card.
965 */
966static void mmc_remove(struct mmc_host *host)
967{
968 BUG_ON(!host);
969 BUG_ON(!host->card);
970
971 mmc_remove_card(host->card);
972 host->card = NULL;
973}
974
975/*
976 * Card detection callback from host.
977 */
978static void mmc_detect(struct mmc_host *host)
979{
980 int err;
981
982 BUG_ON(!host);
983 BUG_ON(!host->card);
984
985 mmc_claim_host(host);
986
987 /*
988 * Just check if our card has been removed.
989 */
990 err = mmc_send_status(host->card, NULL);
991
992 mmc_release_host(host);
993
17b0429d 994 if (err) {
4101c16a 995 mmc_remove(host);
6abaa0c9
PO		 996
997 mmc_claim_host(host);
998 mmc_detach_bus(host);
7f7e4129 999 mmc_power_off(host);
6abaa0c9
PO		 1000 mmc_release_host(host);
1001 }
1002}
1003
6abaa0c9
PO		 1004/*
1005 * Suspend callback from host.
1006 */
95cdfb72 1007static int mmc_suspend(struct mmc_host *host)
6abaa0c9 1008{
c3805467
B		 1009 int err = 0;
1010
6abaa0c9
PO		 1011 BUG_ON(!host);
1012 BUG_ON(!host->card);
7ea239d9 1013
6abaa0c9 1014 mmc_claim_host(host);
c3805467
B		 1015 if (mmc_card_can_sleep(host))
1016 err = mmc_card_sleep(host);
1017 else if (!mmc_host_is_spi(host))
af517150 1018 mmc_deselect_cards(host);
6abaa0c9 1019 host->card->state &= ~MMC_STATE_HIGHSPEED;
7ea239d9 1020 mmc_release_host(host);
95cdfb72 1021
c3805467 1022 return err;
6abaa0c9 1023}
7ea239d9 1024
6abaa0c9
PO		 1025/*
1026 * Resume callback from host.
1027 *
1028 * This function tries to determine if the same card is still present
1029 * and, if so, restore all state to it.
1030 */
95cdfb72 1031static int mmc_resume(struct mmc_host *host)
6abaa0c9
PO		 1032{
1033 int err;
1034
1035 BUG_ON(!host);
1036 BUG_ON(!host->card);
1037
1038 mmc_claim_host(host);
8c75deae 1039 err = mmc_init_card(host, host->ocr, host->card);
2986d0bf
PO		 1040 mmc_release_host(host);
1041
95cdfb72 1042 return err;
6abaa0c9
PO		 1043}
1044
12ae637f 1045static int mmc_power_restore(struct mmc_host *host)
eae1aeee 1046{
12ae637f
OBC		 1047 int ret;
1048
eae1aeee
AH		 1049 host->card->state &= ~MMC_STATE_HIGHSPEED;
1050 mmc_claim_host(host);
12ae637f 1051 ret = mmc_init_card(host, host->ocr, host->card);
eae1aeee 1052 mmc_release_host(host);
12ae637f
OBC		 1053
1054 return ret;
eae1aeee
AH		 1055}
1056
b1ebe384
JL		 1057static int mmc_sleep(struct mmc_host *host)
1058{
1059 struct mmc_card *card = host->card;
1060 int err = -ENOSYS;
1061
1062 if (card && card->ext_csd.rev >= 3) {
1063 err = mmc_card_sleepawake(host, 1);
1064 if (err < 0)
1065 pr_debug("%s: Error %d while putting card into sleep",
1066 mmc_hostname(host), err);
1067 }
1068
1069 return err;
1070}
1071
1072static int mmc_awake(struct mmc_host *host)
1073{
1074 struct mmc_card *card = host->card;
1075 int err = -ENOSYS;
1076
1077 if (card && card->ext_csd.rev >= 3) {
1078 err = mmc_card_sleepawake(host, 0);
1079 if (err < 0)
1080 pr_debug("%s: Error %d while awaking sleeping card",
1081 mmc_hostname(host), err);
1082 }
1083
1084 return err;
1085}
1086
6abaa0c9 1087static const struct mmc_bus_ops mmc_ops = {
b1ebe384
JL		 1088 .awake = mmc_awake,
1089 .sleep = mmc_sleep,
9feae246
AH		 1090 .remove = mmc_remove,
1091 .detect = mmc_detect,
1092 .suspend = NULL,
1093 .resume = NULL,
eae1aeee 1094 .power_restore = mmc_power_restore,
9feae246
AH		 1095};
1096
1097static const struct mmc_bus_ops mmc_ops_unsafe = {
b1ebe384
JL		 1098 .awake = mmc_awake,
1099 .sleep = mmc_sleep,
6abaa0c9
PO		 1100 .remove = mmc_remove,
1101 .detect = mmc_detect,
1102 .suspend = mmc_suspend,
1103 .resume = mmc_resume,
eae1aeee 1104 .power_restore = mmc_power_restore,
6abaa0c9
PO		 1105};
1106
9feae246
AH		 1107static void mmc_attach_bus_ops(struct mmc_host *host)
1108{
1109 const struct mmc_bus_ops *bus_ops;
1110
71d7d3d1 1111 if (!mmc_card_is_removable(host))
9feae246
AH		 1112 bus_ops = &mmc_ops_unsafe;
1113 else
1114 bus_ops = &mmc_ops;
1115 mmc_attach_bus(host, bus_ops);
1116}
1117
6abaa0c9
PO		 1118/*
1119 * Starting point for MMC card init.
1120 */
807e8e40 1121int mmc_attach_mmc(struct mmc_host *host)
6abaa0c9
PO		 1122{
1123 int err;
807e8e40 1124 u32 ocr;
6abaa0c9
PO		 1125
1126 BUG_ON(!host);
d84075c8 1127 WARN_ON(!host->claimed);
6abaa0c9 1128
44669034
SNX		 1129 /* Set correct bus mode for MMC before attempting attach */
1130 if (!mmc_host_is_spi(host))
1131 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1132
807e8e40
AR		 1133 err = mmc_send_op_cond(host, 0, &ocr);
1134 if (err)
1135 return err;
1136
9feae246 1137 mmc_attach_bus_ops(host);
8f230f45
TI		 1138 if (host->ocr_avail_mmc)
1139 host->ocr_avail = host->ocr_avail_mmc;
6abaa0c9 1140
af517150
DB		 1141 /*
1142 * We need to get OCR a different way for SPI.
1143 */
1144 if (mmc_host_is_spi(host)) {
1145 err = mmc_spi_read_ocr(host, 1, &ocr);
1146 if (err)
1147 goto err;
1148 }
1149
6abaa0c9
PO		 1150 /*
1151 * Sanity check the voltages that the card claims to
1152 * support.
1153 */
1154 if (ocr & 0x7F) {
1155 printk(KERN_WARNING "%s: card claims to support voltages "
1156 "below the defined range. These will be ignored.\n",
1157 mmc_hostname(host));
1158 ocr &= ~0x7F;
1159 }
1160
1161 host->ocr = mmc_select_voltage(host, ocr);
1162
1163 /*
1164 * Can we support the voltage of the card?
1165 */
109b5bed
PO		 1166 if (!host->ocr) {
1167 err = -EINVAL;
6abaa0c9 1168 goto err;
109b5bed 1169 }
6abaa0c9
PO		 1170
1171 /*
1172 * Detect and init the card.
1173 */
8c75deae 1174 err = mmc_init_card(host, host->ocr, NULL);
17b0429d 1175 if (err)
6abaa0c9
PO		 1176 goto err;
1177
1178 mmc_release_host(host);
4101c16a 1179 err = mmc_add_card(host->card);
807e8e40 1180 mmc_claim_host(host);
7ea239d9 1181 if (err)
2986d0bf 1182 goto remove_card;
7ea239d9
PO		 1183
1184 return 0;
1185
2986d0bf 1186remove_card:
807e8e40 1187 mmc_release_host(host);
6abaa0c9 1188 mmc_remove_card(host->card);
2986d0bf 1189 mmc_claim_host(host);
807e8e40 1190 host->card = NULL;
7ea239d9
PO		 1191err:
1192 mmc_detach_bus(host);
7ea239d9 1193
109b5bed
PO		 1194 printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
1195 mmc_hostname(host), err);
1196
adf66a0d 1197 return err;
7ea239d9 1198}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git