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mmc: sdhci-spear: Don't set power gpio to 1 on probe
[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 */
362 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
f39b2dd9 363 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
709de99d
CD		 364 u8 hc_erase_grp_sz =
365 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
366 u8 hc_wp_grp_sz =
367 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
368
369 card->ext_csd.enhanced_area_en = 1;
370 /*
371 * calculate the enhanced data area offset, in bytes
372 */
373 card->ext_csd.enhanced_area_offset =
374 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
375 (ext_csd[137] << 8) + ext_csd[136];
376 if (mmc_card_blockaddr(card))
377 card->ext_csd.enhanced_area_offset <<= 9;
378 /*
379 * calculate the enhanced data area size, in kilobytes
380 */
381 card->ext_csd.enhanced_area_size =
382 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
383 ext_csd[140];
384 card->ext_csd.enhanced_area_size *=
385 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
386 card->ext_csd.enhanced_area_size <<= 9;
387 } else {
388 /*
389 * If the enhanced area is not enabled, disable these
390 * device attributes.
391 */
392 card->ext_csd.enhanced_area_offset = -EINVAL;
393 card->ext_csd.enhanced_area_size = -EINVAL;
394 }
dfe86cba
AH		 395 card->ext_csd.sec_trim_mult =
396 ext_csd[EXT_CSD_SEC_TRIM_MULT];
397 card->ext_csd.sec_erase_mult =
398 ext_csd[EXT_CSD_SEC_ERASE_MULT];
399 card->ext_csd.sec_feature_support =
400 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
401 card->ext_csd.trim_timeout = 300 *
402 ext_csd[EXT_CSD_TRIM_MULT];
b1ebe384
JL		 403 }
404
f4c5522b
AW		 405 if (card->ext_csd.rev >= 5)
406 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
407
dfe86cba
AH		 408 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
409 card->erased_byte = 0xFF;
410 else
411 card->erased_byte = 0x0;
412
7ea239d9 413out:
08ee80cc
PR		 414 return err;
415}
416
417static inline void mmc_free_ext_csd(u8 *ext_csd)
418{
7ea239d9 419 kfree(ext_csd);
08ee80cc
PR		 420}
421
7ea239d9 422
f39b2dd9 423static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
08ee80cc
PR		 424{
425 u8 *bw_ext_csd;
426 int err;
427
f39b2dd9
PR		 428 if (bus_width == MMC_BUS_WIDTH_1)
429 return 0;
430
08ee80cc 431 err = mmc_get_ext_csd(card, &bw_ext_csd);
08ee80cc 432
f39b2dd9 433 if (err || bw_ext_csd == NULL) {
08ee80cc
PR		 434 if (bus_width != MMC_BUS_WIDTH_1)
435 err = -EINVAL;
436 goto out;
437 }
438
439 if (bus_width == MMC_BUS_WIDTH_1)
440 goto out;
441
442 /* only compare read only fields */
f39b2dd9 443 err = (!(card->ext_csd.raw_partition_support ==
08ee80cc 444 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
f39b2dd9 445 (card->ext_csd.raw_erased_mem_count ==
08ee80cc 446 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
f39b2dd9 447 (card->ext_csd.rev ==
08ee80cc 448 bw_ext_csd[EXT_CSD_REV]) &&
f39b2dd9 449 (card->ext_csd.raw_ext_csd_structure ==
08ee80cc 450 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
f39b2dd9 451 (card->ext_csd.raw_card_type ==
08ee80cc 452 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
f39b2dd9 453 (card->ext_csd.raw_s_a_timeout ==
08ee80cc 454 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
f39b2dd9 455 (card->ext_csd.raw_hc_erase_gap_size ==
08ee80cc 456 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
f39b2dd9 457 (card->ext_csd.raw_erase_timeout_mult ==
08ee80cc 458 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
f39b2dd9 459 (card->ext_csd.raw_hc_erase_grp_size ==
08ee80cc 460 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
f39b2dd9 461 (card->ext_csd.raw_sec_trim_mult ==
08ee80cc 462 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
f39b2dd9 463 (card->ext_csd.raw_sec_erase_mult ==
08ee80cc 464 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
f39b2dd9 465 (card->ext_csd.raw_sec_feature_support ==
08ee80cc 466 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
f39b2dd9 467 (card->ext_csd.raw_trim_mult ==
08ee80cc 468 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
f39b2dd9
PR		 469 (card->ext_csd.raw_sectors[0] ==
470 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
471 (card->ext_csd.raw_sectors[1] ==
472 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
473 (card->ext_csd.raw_sectors[2] ==
474 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
475 (card->ext_csd.raw_sectors[3] ==
476 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
08ee80cc
PR		 477 if (err)
478 err = -EINVAL;
479
480out:
481 mmc_free_ext_csd(bw_ext_csd);
7ea239d9
PO		 482 return err;
483}
484
51ec92e2
PO		 485MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
486 card->raw_cid[2], card->raw_cid[3]);
487MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
488 card->raw_csd[2], card->raw_csd[3]);
489MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
dfe86cba
AH		 490MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
491MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
51ec92e2
PO		 492MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
493MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
494MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
495MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
496MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
497MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
709de99d
CD		 498MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
499 card->ext_csd.enhanced_area_offset);
500MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
51ec92e2
PO		 501
502static struct attribute *mmc_std_attrs[] = {
503 &dev_attr_cid.attr,
504 &dev_attr_csd.attr,
505 &dev_attr_date.attr,
dfe86cba
AH		 506 &dev_attr_erase_size.attr,
507 &dev_attr_preferred_erase_size.attr,
51ec92e2
PO		 508 &dev_attr_fwrev.attr,
509 &dev_attr_hwrev.attr,
510 &dev_attr_manfid.attr,
511 &dev_attr_name.attr,
512 &dev_attr_oemid.attr,
513 &dev_attr_serial.attr,
709de99d
CD		 514 &dev_attr_enhanced_area_offset.attr,
515 &dev_attr_enhanced_area_size.attr,
51ec92e2
PO		 516 NULL,
517};
518
519static struct attribute_group mmc_std_attr_group = {
520 .attrs = mmc_std_attrs,
521};
522
a4dbd674 523static const struct attribute_group *mmc_attr_groups[] = {
51ec92e2
PO		 524 &mmc_std_attr_group,
525 NULL,
526};
527
528static struct device_type mmc_type = {
529 .groups = mmc_attr_groups,
530};
531
7ea239d9 532/*
6abaa0c9
PO		 533 * Handle the detection and initialisation of a card.
534 *
8769392b 535 * In the case of a resume, "oldcard" will contain the card
6abaa0c9 536 * we're trying to reinitialise.
7ea239d9 537 */
8c75deae 538static int mmc_init_card(struct mmc_host *host, u32 ocr,
6abaa0c9 539 struct mmc_card *oldcard)
7ea239d9
PO		 540{
541 struct mmc_card *card;
25d5c699 542 int err, ddr = 0;
7ea239d9
PO		 543 u32 cid[4];
544 unsigned int max_dtr;
b676f039 545 u32 rocr;
08ee80cc 546 u8 *ext_csd = NULL;
7ea239d9
PO		 547
548 BUG_ON(!host);
d84075c8 549 WARN_ON(!host->claimed);
7ea239d9 550
7ea239d9
PO		 551 /*
552 * Since we're changing the OCR value, we seem to
553 * need to tell some cards to go back to the idle
554 * state. We wait 1ms to give cards time to
555 * respond.
c3805467 556 * mmc_go_idle is needed for eMMC that are asleep
7ea239d9
PO		 557 */
558 mmc_go_idle(host);
559
560 /* The extra bit indicates that we support high capacity */
b676f039 561 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
17b0429d 562 if (err)
6abaa0c9 563 goto err;
7ea239d9 564
af517150
DB		 565 /*
566 * For SPI, enable CRC as appropriate.
567 */
568 if (mmc_host_is_spi(host)) {
569 err = mmc_spi_set_crc(host, use_spi_crc);
570 if (err)
571 goto err;
572 }
573
7ea239d9
PO		 574 /*
575 * Fetch CID from card.
576 */
af517150
DB		 577 if (mmc_host_is_spi(host))
578 err = mmc_send_cid(host, cid);
579 else
580 err = mmc_all_send_cid(host, cid);
17b0429d 581 if (err)
7ea239d9
PO		 582 goto err;
583
6abaa0c9 584 if (oldcard) {
adf66a0d
PO		 585 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
586 err = -ENOENT;
6abaa0c9 587 goto err;
adf66a0d 588 }
6abaa0c9
PO		 589
590 card = oldcard;
591 } else {
592 /*
593 * Allocate card structure.
594 */
51ec92e2 595 card = mmc_alloc_card(host, &mmc_type);
adf66a0d
PO		 596 if (IS_ERR(card)) {
597 err = PTR_ERR(card);
6abaa0c9 598 goto err;
adf66a0d 599 }
7ea239d9 600
6abaa0c9
PO		 601 card->type = MMC_TYPE_MMC;
602 card->rca = 1;
603 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
604 }
7ea239d9
PO		 605
606 /*
af517150 607 * For native busses: set card RCA and quit open drain mode.
7ea239d9 608 */
af517150
DB		 609 if (!mmc_host_is_spi(host)) {
610 err = mmc_set_relative_addr(card);
611 if (err)
612 goto free_card;
7ea239d9 613
af517150
DB		 614 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
615 }
7ea239d9 616
6abaa0c9
PO		 617 if (!oldcard) {
618 /*
619 * Fetch CSD from card.
620 */
621 err = mmc_send_csd(card, card->raw_csd);
17b0429d 622 if (err)
6abaa0c9 623 goto free_card;
7ea239d9 624
bd766312 625 err = mmc_decode_csd(card);
adf66a0d 626 if (err)
bd766312
PO		 627 goto free_card;
628 err = mmc_decode_cid(card);
adf66a0d 629 if (err)
bd766312 630 goto free_card;
6abaa0c9 631 }
7ea239d9
PO		 632
633 /*
89a73cf5 634 * Select card, as all following commands rely on that.
7ea239d9 635 */
af517150
DB		 636 if (!mmc_host_is_spi(host)) {
637 err = mmc_select_card(card);
638 if (err)
639 goto free_card;
640 }
7ea239d9 641
6abaa0c9
PO		 642 if (!oldcard) {
643 /*
af517150 644 * Fetch and process extended CSD.
6abaa0c9 645 */
08ee80cc
PR		 646
647 err = mmc_get_ext_csd(card, &ext_csd);
648 if (err)
649 goto free_card;
650 err = mmc_read_ext_csd(card, ext_csd);
17b0429d 651 if (err)
6abaa0c9 652 goto free_card;
b676f039
PR		 653
654 /* If doing byte addressing, check if required to do sector
655 * addressing. Handle the case of <2GB cards needing sector
656 * addressing. See section 8.1 JEDEC Standard JED84-A441;
657 * ocr register has bit 30 set for sector addressing.
658 */
659 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
660 mmc_card_set_blockaddr(card);
661
dfe86cba
AH		 662 /* Erase size depends on CSD and Extended CSD */
663 mmc_set_erase_size(card);
6abaa0c9 664 }
7ea239d9 665
709de99d
CD		 666 /*
667 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
25985edc 668 * bit. This bit will be lost every time after a reset or power off.
709de99d
CD		 669 */
670 if (card->ext_csd.enhanced_area_en) {
671 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 672 EXT_CSD_ERASE_GROUP_DEF, 1, 0);
709de99d
CD		 673
674 if (err && err != -EBADMSG)
675 goto free_card;
676
677 if (err) {
678 err = 0;
679 /*
680 * Just disable enhanced area off & sz
681 * will try to enable ERASE_GROUP_DEF
682 * during next time reinit
683 */
684 card->ext_csd.enhanced_area_offset = -EINVAL;
685 card->ext_csd.enhanced_area_size = -EINVAL;
686 } else {
687 card->ext_csd.erase_group_def = 1;
688 /*
689 * enable ERASE_GRP_DEF successfully.
690 * This will affect the erase size, so
691 * here need to reset erase size
692 */
693 mmc_set_erase_size(card);
694 }
695 }
696
41e2a489
PR		 697 /*
698 * Ensure eMMC user default partition is enabled
699 */
371a689f
AW		 700 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
701 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
702 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
703 card->ext_csd.part_config,
704 card->ext_csd.part_time);
705 if (err && err != -EBADMSG)
706 goto free_card;
41e2a489
PR		 707 }
708
89a73cf5
PO		 709 /*
710 * Activate high speed (if supported)
711 */
712 if ((card->ext_csd.hs_max_dtr != 0) &&
713 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
714 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 715 EXT_CSD_HS_TIMING, 1, 0);
ef0b27d4 716 if (err && err != -EBADMSG)
89a73cf5
PO		 717 goto free_card;
718
ef0b27d4
AH		 719 if (err) {
720 printk(KERN_WARNING "%s: switch to highspeed failed\n",
721 mmc_hostname(card->host));
722 err = 0;
723 } else {
724 mmc_card_set_highspeed(card);
725 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
726 }
89a73cf5
PO		 727 }
728
7ea239d9
PO		 729 /*
730 * Compute bus speed.
731 */
732 max_dtr = (unsigned int)-1;
733
734 if (mmc_card_highspeed(card)) {
735 if (max_dtr > card->ext_csd.hs_max_dtr)
736 max_dtr = card->ext_csd.hs_max_dtr;
737 } else if (max_dtr > card->csd.max_dtr) {
738 max_dtr = card->csd.max_dtr;
739 }
740
741 mmc_set_clock(host, max_dtr);
742
dfc13e84 743 /*
0f8d8ea6 744 * Indicate DDR mode (if supported).
dfc13e84
HP		 745 */
746 if (mmc_card_highspeed(card)) {
747 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
4c4cb171
PR		 748 && ((host->caps & (MMC_CAP_1_8V_DDR |
749 MMC_CAP_UHS_DDR50))
750 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 751 ddr = MMC_1_8V_DDR_MODE;
dfc13e84 752 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
4c4cb171
PR		 753 && ((host->caps & (MMC_CAP_1_2V_DDR |
754 MMC_CAP_UHS_DDR50))
755 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 756 ddr = MMC_1_2V_DDR_MODE;
dfc13e84
HP		 757 }
758
89a73cf5 759 /*
0f8d8ea6 760 * Activate wide bus and DDR (if supported).
89a73cf5
PO		 761 */
762 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
b30f8af3 763 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
22113efd
AL		 764 static unsigned ext_csd_bits[][2] = {
765 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
766 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
767 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
768 };
769 static unsigned bus_widths[] = {
770 MMC_BUS_WIDTH_8,
771 MMC_BUS_WIDTH_4,
772 MMC_BUS_WIDTH_1
773 };
774 unsigned idx, bus_width = 0;
775
776 if (host->caps & MMC_CAP_8_BIT_DATA)
777 idx = 0;
778 else
779 idx = 1;
780 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
781 bus_width = bus_widths[idx];
782 if (bus_width == MMC_BUS_WIDTH_1)
783 ddr = 0; /* no DDR for 1-bit width */
784 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
785 EXT_CSD_BUS_WIDTH,
d3a8d95d
AW		 786 ext_csd_bits[idx][0],
787 0);
22113efd 788 if (!err) {
4c4cb171 789 mmc_set_bus_width(card->host, bus_width);
08ee80cc 790
22113efd
AL		 791 /*
792 * If controller can't handle bus width test,
08ee80cc
PR		 793 * compare ext_csd previously read in 1 bit mode
794 * against ext_csd at new bus width
22113efd
AL		 795 */
796 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
08ee80cc 797 err = mmc_compare_ext_csds(card,
08ee80cc
PR		 798 bus_width);
799 else
800 err = mmc_bus_test(card, bus_width);
22113efd
AL		 801 if (!err)
802 break;
803 }
b30f8af3
JL		 804 }
805
22113efd
AL		 806 if (!err && ddr) {
807 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d
AW		 808 EXT_CSD_BUS_WIDTH,
809 ext_csd_bits[idx][1],
810 0);
22113efd 811 }
ef0b27d4 812 if (err) {
0f8d8ea6 813 printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
22113efd
AL		 814 "failed\n", mmc_hostname(card->host),
815 1 << bus_width, ddr);
816 goto free_card;
817 } else if (ddr) {
4c4cb171
PR		 818 /*
819 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
820 * signaling.
821 *
822 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
823 *
824 * 1.8V vccq at 3.3V core voltage (vcc) is not required
825 * in the JEDEC spec for DDR.
826 *
827 * Do not force change in vccq since we are obviously
828 * working and no change to vccq is needed.
829 *
830 * WARNING: eMMC rules are NOT the same as SD DDR
831 */
832 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
833 err = mmc_set_signal_voltage(host,
834 MMC_SIGNAL_VOLTAGE_120, 0);
835 if (err)
836 goto err;
837 }
22113efd 838 mmc_card_set_ddr_mode(card);
4c4cb171
PR		 839 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
840 mmc_set_bus_width(card->host, bus_width);
ef0b27d4 841 }
89a73cf5
PO		 842 }
843
6abaa0c9
PO		 844 if (!oldcard)
845 host->card = card;
846
08ee80cc 847 mmc_free_ext_csd(ext_csd);
17b0429d 848 return 0;
6abaa0c9
PO		 849
850free_card:
851 if (!oldcard)
852 mmc_remove_card(card);
853err:
08ee80cc 854 mmc_free_ext_csd(ext_csd);
6abaa0c9 855
adf66a0d 856 return err;
6abaa0c9
PO		 857}
858
859/*
860 * Host is being removed. Free up the current card.
861 */
862static void mmc_remove(struct mmc_host *host)
863{
864 BUG_ON(!host);
865 BUG_ON(!host->card);
866
867 mmc_remove_card(host->card);
868 host->card = NULL;
869}
870
871/*
872 * Card detection callback from host.
873 */
874static void mmc_detect(struct mmc_host *host)
875{
876 int err;
877
878 BUG_ON(!host);
879 BUG_ON(!host->card);
880
881 mmc_claim_host(host);
882
883 /*
884 * Just check if our card has been removed.
885 */
886 err = mmc_send_status(host->card, NULL);
887
888 mmc_release_host(host);
889
17b0429d 890 if (err) {
4101c16a 891 mmc_remove(host);
6abaa0c9
PO		 892
893 mmc_claim_host(host);
894 mmc_detach_bus(host);
895 mmc_release_host(host);
896 }
897}
898
6abaa0c9
PO		 899/*
900 * Suspend callback from host.
901 */
95cdfb72 902static int mmc_suspend(struct mmc_host *host)
6abaa0c9 903{
c3805467
B		 904 int err = 0;
905
6abaa0c9
PO		 906 BUG_ON(!host);
907 BUG_ON(!host->card);
7ea239d9 908
6abaa0c9 909 mmc_claim_host(host);
c3805467
B		 910 if (mmc_card_can_sleep(host))
911 err = mmc_card_sleep(host);
912 else if (!mmc_host_is_spi(host))
af517150 913 mmc_deselect_cards(host);
6abaa0c9 914 host->card->state &= ~MMC_STATE_HIGHSPEED;
7ea239d9 915 mmc_release_host(host);
95cdfb72 916
c3805467 917 return err;
6abaa0c9 918}
7ea239d9 919
6abaa0c9
PO		 920/*
921 * Resume callback from host.
922 *
923 * This function tries to determine if the same card is still present
924 * and, if so, restore all state to it.
925 */
95cdfb72 926static int mmc_resume(struct mmc_host *host)
6abaa0c9
PO		 927{
928 int err;
929
930 BUG_ON(!host);
931 BUG_ON(!host->card);
932
933 mmc_claim_host(host);
8c75deae 934 err = mmc_init_card(host, host->ocr, host->card);
2986d0bf
PO		 935 mmc_release_host(host);
936
95cdfb72 937 return err;
6abaa0c9
PO		 938}
939
12ae637f 940static int mmc_power_restore(struct mmc_host *host)
eae1aeee 941{
12ae637f
OBC		 942 int ret;
943
eae1aeee
AH		 944 host->card->state &= ~MMC_STATE_HIGHSPEED;
945 mmc_claim_host(host);
12ae637f 946 ret = mmc_init_card(host, host->ocr, host->card);
eae1aeee 947 mmc_release_host(host);
12ae637f
OBC		 948
949 return ret;
eae1aeee
AH		 950}
951
b1ebe384
JL		 952static int mmc_sleep(struct mmc_host *host)
953{
954 struct mmc_card *card = host->card;
955 int err = -ENOSYS;
956
957 if (card && card->ext_csd.rev >= 3) {
958 err = mmc_card_sleepawake(host, 1);
959 if (err < 0)
960 pr_debug("%s: Error %d while putting card into sleep",
961 mmc_hostname(host), err);
962 }
963
964 return err;
965}
966
967static int mmc_awake(struct mmc_host *host)
968{
969 struct mmc_card *card = host->card;
970 int err = -ENOSYS;
971
972 if (card && card->ext_csd.rev >= 3) {
973 err = mmc_card_sleepawake(host, 0);
974 if (err < 0)
975 pr_debug("%s: Error %d while awaking sleeping card",
976 mmc_hostname(host), err);
977 }
978
979 return err;
980}
981
6abaa0c9 982static const struct mmc_bus_ops mmc_ops = {
b1ebe384
JL		 983 .awake = mmc_awake,
984 .sleep = mmc_sleep,
9feae246
AH		 985 .remove = mmc_remove,
986 .detect = mmc_detect,
987 .suspend = NULL,
988 .resume = NULL,
eae1aeee 989 .power_restore = mmc_power_restore,
9feae246
AH		 990};
991
992static const struct mmc_bus_ops mmc_ops_unsafe = {
b1ebe384
JL		 993 .awake = mmc_awake,
994 .sleep = mmc_sleep,
6abaa0c9
PO		 995 .remove = mmc_remove,
996 .detect = mmc_detect,
997 .suspend = mmc_suspend,
998 .resume = mmc_resume,
eae1aeee 999 .power_restore = mmc_power_restore,
6abaa0c9
PO		 1000};
1001
9feae246
AH		 1002static void mmc_attach_bus_ops(struct mmc_host *host)
1003{
1004 const struct mmc_bus_ops *bus_ops;
1005
71d7d3d1 1006 if (!mmc_card_is_removable(host))
9feae246
AH		 1007 bus_ops = &mmc_ops_unsafe;
1008 else
1009 bus_ops = &mmc_ops;
1010 mmc_attach_bus(host, bus_ops);
1011}
1012
6abaa0c9
PO		 1013/*
1014 * Starting point for MMC card init.
1015 */
807e8e40 1016int mmc_attach_mmc(struct mmc_host *host)
6abaa0c9
PO		 1017{
1018 int err;
807e8e40 1019 u32 ocr;
6abaa0c9
PO		 1020
1021 BUG_ON(!host);
d84075c8 1022 WARN_ON(!host->claimed);
6abaa0c9 1023
807e8e40
AR		 1024 err = mmc_send_op_cond(host, 0, &ocr);
1025 if (err)
1026 return err;
1027
9feae246 1028 mmc_attach_bus_ops(host);
8f230f45
TI		 1029 if (host->ocr_avail_mmc)
1030 host->ocr_avail = host->ocr_avail_mmc;
6abaa0c9 1031
af517150
DB		 1032 /*
1033 * We need to get OCR a different way for SPI.
1034 */
1035 if (mmc_host_is_spi(host)) {
1036 err = mmc_spi_read_ocr(host, 1, &ocr);
1037 if (err)
1038 goto err;
1039 }
1040
6abaa0c9
PO		 1041 /*
1042 * Sanity check the voltages that the card claims to
1043 * support.
1044 */
1045 if (ocr & 0x7F) {
1046 printk(KERN_WARNING "%s: card claims to support voltages "
1047 "below the defined range. These will be ignored.\n",
1048 mmc_hostname(host));
1049 ocr &= ~0x7F;
1050 }
1051
1052 host->ocr = mmc_select_voltage(host, ocr);
1053
1054 /*
1055 * Can we support the voltage of the card?
1056 */
109b5bed
PO		 1057 if (!host->ocr) {
1058 err = -EINVAL;
6abaa0c9 1059 goto err;
109b5bed 1060 }
6abaa0c9
PO		 1061
1062 /*
1063 * Detect and init the card.
1064 */
8c75deae 1065 err = mmc_init_card(host, host->ocr, NULL);
17b0429d 1066 if (err)
6abaa0c9
PO		 1067 goto err;
1068
1069 mmc_release_host(host);
4101c16a 1070 err = mmc_add_card(host->card);
807e8e40 1071 mmc_claim_host(host);
7ea239d9 1072 if (err)
2986d0bf 1073 goto remove_card;
7ea239d9
PO		 1074
1075 return 0;
1076
2986d0bf 1077remove_card:
807e8e40 1078 mmc_release_host(host);
6abaa0c9 1079 mmc_remove_card(host->card);
2986d0bf 1080 mmc_claim_host(host);
807e8e40 1081 host->card = NULL;
7ea239d9
PO		 1082err:
1083 mmc_detach_bus(host);
7ea239d9 1084
109b5bed
PO		 1085 printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
1086 mmc_hostname(host), err);
1087
adf66a0d 1088 return err;
7ea239d9 1089}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git