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mmc: sdhci-s3c: add default controller configuration
[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.
556 */
557 mmc_go_idle(host);
558
559 /* The extra bit indicates that we support high capacity */
b676f039 560 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
17b0429d 561 if (err)
6abaa0c9 562 goto err;
7ea239d9 563
af517150
DB		 564 /*
565 * For SPI, enable CRC as appropriate.
566 */
567 if (mmc_host_is_spi(host)) {
568 err = mmc_spi_set_crc(host, use_spi_crc);
569 if (err)
570 goto err;
571 }
572
7ea239d9
PO		 573 /*
574 * Fetch CID from card.
575 */
af517150
DB		 576 if (mmc_host_is_spi(host))
577 err = mmc_send_cid(host, cid);
578 else
579 err = mmc_all_send_cid(host, cid);
17b0429d 580 if (err)
7ea239d9
PO		 581 goto err;
582
6abaa0c9 583 if (oldcard) {
adf66a0d
PO		 584 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
585 err = -ENOENT;
6abaa0c9 586 goto err;
adf66a0d 587 }
6abaa0c9
PO		 588
589 card = oldcard;
590 } else {
591 /*
592 * Allocate card structure.
593 */
51ec92e2 594 card = mmc_alloc_card(host, &mmc_type);
adf66a0d
PO		 595 if (IS_ERR(card)) {
596 err = PTR_ERR(card);
6abaa0c9 597 goto err;
adf66a0d 598 }
7ea239d9 599
6abaa0c9
PO		 600 card->type = MMC_TYPE_MMC;
601 card->rca = 1;
602 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
603 }
7ea239d9
PO		 604
605 /*
af517150 606 * For native busses: set card RCA and quit open drain mode.
7ea239d9 607 */
af517150
DB		 608 if (!mmc_host_is_spi(host)) {
609 err = mmc_set_relative_addr(card);
610 if (err)
611 goto free_card;
7ea239d9 612
af517150
DB		 613 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
614 }
7ea239d9 615
6abaa0c9
PO		 616 if (!oldcard) {
617 /*
618 * Fetch CSD from card.
619 */
620 err = mmc_send_csd(card, card->raw_csd);
17b0429d 621 if (err)
6abaa0c9 622 goto free_card;
7ea239d9 623
bd766312 624 err = mmc_decode_csd(card);
adf66a0d 625 if (err)
bd766312
PO		 626 goto free_card;
627 err = mmc_decode_cid(card);
adf66a0d 628 if (err)
bd766312 629 goto free_card;
6abaa0c9 630 }
7ea239d9
PO		 631
632 /*
89a73cf5 633 * Select card, as all following commands rely on that.
7ea239d9 634 */
af517150
DB		 635 if (!mmc_host_is_spi(host)) {
636 err = mmc_select_card(card);
637 if (err)
638 goto free_card;
639 }
7ea239d9 640
6abaa0c9
PO		 641 if (!oldcard) {
642 /*
af517150 643 * Fetch and process extended CSD.
6abaa0c9 644 */
08ee80cc
PR		 645
646 err = mmc_get_ext_csd(card, &ext_csd);
647 if (err)
648 goto free_card;
649 err = mmc_read_ext_csd(card, ext_csd);
17b0429d 650 if (err)
6abaa0c9 651 goto free_card;
b676f039
PR		 652
653 /* If doing byte addressing, check if required to do sector
654 * addressing. Handle the case of <2GB cards needing sector
655 * addressing. See section 8.1 JEDEC Standard JED84-A441;
656 * ocr register has bit 30 set for sector addressing.
657 */
658 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
659 mmc_card_set_blockaddr(card);
660
dfe86cba
AH		 661 /* Erase size depends on CSD and Extended CSD */
662 mmc_set_erase_size(card);
6abaa0c9 663 }
7ea239d9 664
709de99d
CD		 665 /*
666 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
25985edc 667 * bit. This bit will be lost every time after a reset or power off.
709de99d
CD		 668 */
669 if (card->ext_csd.enhanced_area_en) {
670 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 671 EXT_CSD_ERASE_GROUP_DEF, 1, 0);
709de99d
CD		 672
673 if (err && err != -EBADMSG)
674 goto free_card;
675
676 if (err) {
677 err = 0;
678 /*
679 * Just disable enhanced area off & sz
680 * will try to enable ERASE_GROUP_DEF
681 * during next time reinit
682 */
683 card->ext_csd.enhanced_area_offset = -EINVAL;
684 card->ext_csd.enhanced_area_size = -EINVAL;
685 } else {
686 card->ext_csd.erase_group_def = 1;
687 /*
688 * enable ERASE_GRP_DEF successfully.
689 * This will affect the erase size, so
690 * here need to reset erase size
691 */
692 mmc_set_erase_size(card);
693 }
694 }
695
41e2a489
PR		 696 /*
697 * Ensure eMMC user default partition is enabled
698 */
371a689f
AW		 699 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
700 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
701 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
702 card->ext_csd.part_config,
703 card->ext_csd.part_time);
704 if (err && err != -EBADMSG)
705 goto free_card;
41e2a489
PR		 706 }
707
89a73cf5
PO		 708 /*
709 * Activate high speed (if supported)
710 */
711 if ((card->ext_csd.hs_max_dtr != 0) &&
712 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
713 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d 714 EXT_CSD_HS_TIMING, 1, 0);
ef0b27d4 715 if (err && err != -EBADMSG)
89a73cf5
PO		 716 goto free_card;
717
ef0b27d4
AH		 718 if (err) {
719 printk(KERN_WARNING "%s: switch to highspeed failed\n",
720 mmc_hostname(card->host));
721 err = 0;
722 } else {
723 mmc_card_set_highspeed(card);
724 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
725 }
89a73cf5
PO		 726 }
727
7ea239d9
PO		 728 /*
729 * Compute bus speed.
730 */
731 max_dtr = (unsigned int)-1;
732
733 if (mmc_card_highspeed(card)) {
734 if (max_dtr > card->ext_csd.hs_max_dtr)
735 max_dtr = card->ext_csd.hs_max_dtr;
736 } else if (max_dtr > card->csd.max_dtr) {
737 max_dtr = card->csd.max_dtr;
738 }
739
740 mmc_set_clock(host, max_dtr);
741
dfc13e84 742 /*
0f8d8ea6 743 * Indicate DDR mode (if supported).
dfc13e84
HP		 744 */
745 if (mmc_card_highspeed(card)) {
746 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
4c4cb171
PR		 747 && ((host->caps & (MMC_CAP_1_8V_DDR |
748 MMC_CAP_UHS_DDR50))
749 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 750 ddr = MMC_1_8V_DDR_MODE;
dfc13e84 751 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
4c4cb171
PR		 752 && ((host->caps & (MMC_CAP_1_2V_DDR |
753 MMC_CAP_UHS_DDR50))
754 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
49e3b5a4 755 ddr = MMC_1_2V_DDR_MODE;
dfc13e84
HP		 756 }
757
89a73cf5 758 /*
0f8d8ea6 759 * Activate wide bus and DDR (if supported).
89a73cf5
PO		 760 */
761 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
b30f8af3 762 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
22113efd
AL		 763 static unsigned ext_csd_bits[][2] = {
764 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
765 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
766 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
767 };
768 static unsigned bus_widths[] = {
769 MMC_BUS_WIDTH_8,
770 MMC_BUS_WIDTH_4,
771 MMC_BUS_WIDTH_1
772 };
773 unsigned idx, bus_width = 0;
774
775 if (host->caps & MMC_CAP_8_BIT_DATA)
776 idx = 0;
777 else
778 idx = 1;
779 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
780 bus_width = bus_widths[idx];
781 if (bus_width == MMC_BUS_WIDTH_1)
782 ddr = 0; /* no DDR for 1-bit width */
783 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
784 EXT_CSD_BUS_WIDTH,
d3a8d95d
AW		 785 ext_csd_bits[idx][0],
786 0);
22113efd 787 if (!err) {
4c4cb171 788 mmc_set_bus_width(card->host, bus_width);
08ee80cc 789
22113efd
AL		 790 /*
791 * If controller can't handle bus width test,
08ee80cc
PR		 792 * compare ext_csd previously read in 1 bit mode
793 * against ext_csd at new bus width
22113efd
AL		 794 */
795 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
08ee80cc 796 err = mmc_compare_ext_csds(card,
08ee80cc
PR		 797 bus_width);
798 else
799 err = mmc_bus_test(card, bus_width);
22113efd
AL		 800 if (!err)
801 break;
802 }
b30f8af3
JL		 803 }
804
22113efd
AL		 805 if (!err && ddr) {
806 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
d3a8d95d
AW		 807 EXT_CSD_BUS_WIDTH,
808 ext_csd_bits[idx][1],
809 0);
22113efd 810 }
ef0b27d4 811 if (err) {
0f8d8ea6 812 printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
22113efd
AL		 813 "failed\n", mmc_hostname(card->host),
814 1 << bus_width, ddr);
815 goto free_card;
816 } else if (ddr) {
4c4cb171
PR		 817 /*
818 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
819 * signaling.
820 *
821 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
822 *
823 * 1.8V vccq at 3.3V core voltage (vcc) is not required
824 * in the JEDEC spec for DDR.
825 *
826 * Do not force change in vccq since we are obviously
827 * working and no change to vccq is needed.
828 *
829 * WARNING: eMMC rules are NOT the same as SD DDR
830 */
831 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
832 err = mmc_set_signal_voltage(host,
833 MMC_SIGNAL_VOLTAGE_120, 0);
834 if (err)
835 goto err;
836 }
22113efd 837 mmc_card_set_ddr_mode(card);
4c4cb171
PR		 838 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
839 mmc_set_bus_width(card->host, bus_width);
ef0b27d4 840 }
89a73cf5
PO		 841 }
842
6abaa0c9
PO		 843 if (!oldcard)
844 host->card = card;
845
08ee80cc 846 mmc_free_ext_csd(ext_csd);
17b0429d 847 return 0;
6abaa0c9
PO		 848
849free_card:
850 if (!oldcard)
851 mmc_remove_card(card);
852err:
08ee80cc 853 mmc_free_ext_csd(ext_csd);
6abaa0c9 854
adf66a0d 855 return err;
6abaa0c9
PO		 856}
857
858/*
859 * Host is being removed. Free up the current card.
860 */
861static void mmc_remove(struct mmc_host *host)
862{
863 BUG_ON(!host);
864 BUG_ON(!host->card);
865
866 mmc_remove_card(host->card);
867 host->card = NULL;
868}
869
870/*
871 * Card detection callback from host.
872 */
873static void mmc_detect(struct mmc_host *host)
874{
875 int err;
876
877 BUG_ON(!host);
878 BUG_ON(!host->card);
879
880 mmc_claim_host(host);
881
882 /*
883 * Just check if our card has been removed.
884 */
885 err = mmc_send_status(host->card, NULL);
886
887 mmc_release_host(host);
888
17b0429d 889 if (err) {
4101c16a 890 mmc_remove(host);
6abaa0c9
PO		 891
892 mmc_claim_host(host);
893 mmc_detach_bus(host);
894 mmc_release_host(host);
895 }
896}
897
6abaa0c9
PO		 898/*
899 * Suspend callback from host.
900 */
95cdfb72 901static int mmc_suspend(struct mmc_host *host)
6abaa0c9
PO		 902{
903 BUG_ON(!host);
904 BUG_ON(!host->card);
7ea239d9 905
6abaa0c9 906 mmc_claim_host(host);
af517150
DB		 907 if (!mmc_host_is_spi(host))
908 mmc_deselect_cards(host);
6abaa0c9 909 host->card->state &= ~MMC_STATE_HIGHSPEED;
7ea239d9 910 mmc_release_host(host);
95cdfb72
NP		 911
912 return 0;
6abaa0c9 913}
7ea239d9 914
6abaa0c9
PO		 915/*
916 * Resume callback from host.
917 *
918 * This function tries to determine if the same card is still present
919 * and, if so, restore all state to it.
920 */
95cdfb72 921static int mmc_resume(struct mmc_host *host)
6abaa0c9
PO		 922{
923 int err;
924
925 BUG_ON(!host);
926 BUG_ON(!host->card);
927
928 mmc_claim_host(host);
8c75deae 929 err = mmc_init_card(host, host->ocr, host->card);
2986d0bf
PO		 930 mmc_release_host(host);
931
95cdfb72 932 return err;
6abaa0c9
PO		 933}
934
12ae637f 935static int mmc_power_restore(struct mmc_host *host)
eae1aeee 936{
12ae637f
OBC		 937 int ret;
938
eae1aeee
AH		 939 host->card->state &= ~MMC_STATE_HIGHSPEED;
940 mmc_claim_host(host);
12ae637f 941 ret = mmc_init_card(host, host->ocr, host->card);
eae1aeee 942 mmc_release_host(host);
12ae637f
OBC		 943
944 return ret;
eae1aeee
AH		 945}
946
b1ebe384
JL		 947static int mmc_sleep(struct mmc_host *host)
948{
949 struct mmc_card *card = host->card;
950 int err = -ENOSYS;
951
952 if (card && card->ext_csd.rev >= 3) {
953 err = mmc_card_sleepawake(host, 1);
954 if (err < 0)
955 pr_debug("%s: Error %d while putting card into sleep",
956 mmc_hostname(host), err);
957 }
958
959 return err;
960}
961
962static int mmc_awake(struct mmc_host *host)
963{
964 struct mmc_card *card = host->card;
965 int err = -ENOSYS;
966
967 if (card && card->ext_csd.rev >= 3) {
968 err = mmc_card_sleepawake(host, 0);
969 if (err < 0)
970 pr_debug("%s: Error %d while awaking sleeping card",
971 mmc_hostname(host), err);
972 }
973
974 return err;
975}
976
6abaa0c9 977static const struct mmc_bus_ops mmc_ops = {
b1ebe384
JL		 978 .awake = mmc_awake,
979 .sleep = mmc_sleep,
9feae246
AH		 980 .remove = mmc_remove,
981 .detect = mmc_detect,
982 .suspend = NULL,
983 .resume = NULL,
eae1aeee 984 .power_restore = mmc_power_restore,
9feae246
AH		 985};
986
987static const struct mmc_bus_ops mmc_ops_unsafe = {
b1ebe384
JL		 988 .awake = mmc_awake,
989 .sleep = mmc_sleep,
6abaa0c9
PO		 990 .remove = mmc_remove,
991 .detect = mmc_detect,
992 .suspend = mmc_suspend,
993 .resume = mmc_resume,
eae1aeee 994 .power_restore = mmc_power_restore,
6abaa0c9
PO		 995};
996
9feae246
AH		 997static void mmc_attach_bus_ops(struct mmc_host *host)
998{
999 const struct mmc_bus_ops *bus_ops;
1000
71d7d3d1 1001 if (!mmc_card_is_removable(host))
9feae246
AH		 1002 bus_ops = &mmc_ops_unsafe;
1003 else
1004 bus_ops = &mmc_ops;
1005 mmc_attach_bus(host, bus_ops);
1006}
1007
6abaa0c9
PO		 1008/*
1009 * Starting point for MMC card init.
1010 */
807e8e40 1011int mmc_attach_mmc(struct mmc_host *host)
6abaa0c9
PO		 1012{
1013 int err;
807e8e40 1014 u32 ocr;
6abaa0c9
PO		 1015
1016 BUG_ON(!host);
d84075c8 1017 WARN_ON(!host->claimed);
6abaa0c9 1018
807e8e40
AR		 1019 err = mmc_send_op_cond(host, 0, &ocr);
1020 if (err)
1021 return err;
1022
9feae246 1023 mmc_attach_bus_ops(host);
8f230f45
TI		 1024 if (host->ocr_avail_mmc)
1025 host->ocr_avail = host->ocr_avail_mmc;
6abaa0c9 1026
af517150
DB		 1027 /*
1028 * We need to get OCR a different way for SPI.
1029 */
1030 if (mmc_host_is_spi(host)) {
1031 err = mmc_spi_read_ocr(host, 1, &ocr);
1032 if (err)
1033 goto err;
1034 }
1035
6abaa0c9
PO		 1036 /*
1037 * Sanity check the voltages that the card claims to
1038 * support.
1039 */
1040 if (ocr & 0x7F) {
1041 printk(KERN_WARNING "%s: card claims to support voltages "
1042 "below the defined range. These will be ignored.\n",
1043 mmc_hostname(host));
1044 ocr &= ~0x7F;
1045 }
1046
1047 host->ocr = mmc_select_voltage(host, ocr);
1048
1049 /*
1050 * Can we support the voltage of the card?
1051 */
109b5bed
PO		 1052 if (!host->ocr) {
1053 err = -EINVAL;
6abaa0c9 1054 goto err;
109b5bed 1055 }
6abaa0c9
PO		 1056
1057 /*
1058 * Detect and init the card.
1059 */
8c75deae 1060 err = mmc_init_card(host, host->ocr, NULL);
17b0429d 1061 if (err)
6abaa0c9
PO		 1062 goto err;
1063
1064 mmc_release_host(host);
4101c16a 1065 err = mmc_add_card(host->card);
807e8e40 1066 mmc_claim_host(host);
7ea239d9 1067 if (err)
2986d0bf 1068 goto remove_card;
7ea239d9
PO		 1069
1070 return 0;
1071
2986d0bf 1072remove_card:
807e8e40 1073 mmc_release_host(host);
6abaa0c9 1074 mmc_remove_card(host->card);
2986d0bf 1075 mmc_claim_host(host);
807e8e40 1076 host->card = NULL;
7ea239d9
PO		 1077err:
1078 mmc_detach_bus(host);
7ea239d9 1079
109b5bed
PO		 1080 printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
1081 mmc_hostname(host), err);
1082
adf66a0d 1083 return err;
7ea239d9 1084}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git