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1/*
2 * linux/drivers/mmc/core/mmc.c
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>
14#include <linux/slab.h>
15#include <linux/stat.h>
16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20
21#include "core.h"
22#include "bus.h"
23#include "mmc_ops.h"
24#include "sd_ops.h"
25
26static const unsigned int tran_exp[] = {
27 10000, 100000, 1000000, 10000000,
28 0, 0, 0, 0
29};
30
31static const unsigned char tran_mant[] = {
32 0, 10, 12, 13, 15, 20, 25, 30,
33 35, 40, 45, 50, 55, 60, 70, 80,
34};
35
36static const unsigned int tacc_exp[] = {
37 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
38};
39
40static const unsigned int tacc_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
43};
44
45#define UNSTUFF_BITS(resp,start,size) \
46 ({ \
47 const int __size = size; \
48 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
49 const int __off = 3 - ((start) / 32); \
50 const int __shft = (start) & 31; \
51 u32 __res; \
52 \
53 __res = resp[__off] >> __shft; \
54 if (__size + __shft > 32) \
55 __res |= resp[__off-1] << ((32 - __shft) % 32); \
56 __res & __mask; \
57 })
58
59/*
60 * Given the decoded CSD structure, decode the raw CID to our CID structure.
61 */
62static int mmc_decode_cid(struct mmc_card *card)
63{
64 u32 *resp = card->raw_cid;
65
66 /*
67 * The selection of the format here is based upon published
68 * specs from sandisk and from what people have reported.
69 */
70 switch (card->csd.mmca_vsn) {
71 case 0: /* MMC v1.0 - v1.2 */
72 case 1: /* MMC v1.4 */
73 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
74 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
75 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
76 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
77 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
78 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
79 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
80 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
84 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
85 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
86 break;
87
88 case 2: /* MMC v2.0 - v2.2 */
89 case 3: /* MMC v3.1 - v3.3 */
90 case 4: /* MMC v4 */
91 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
92 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
93 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
94 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
95 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
96 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
97 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
98 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
102 break;
103
104 default:
105 pr_err("%s: card has unknown MMCA version %d\n",
106 mmc_hostname(card->host), card->csd.mmca_vsn);
107 return -EINVAL;
108 }
109
110 return 0;
111}
112
113static void mmc_set_erase_size(struct mmc_card *card)
114{
115 if (card->ext_csd.erase_group_def & 1)
116 card->erase_size = card->ext_csd.hc_erase_size;
117 else
118 card->erase_size = card->csd.erase_size;
119
120 mmc_init_erase(card);
121}
122
123/*
124 * Given a 128-bit response, decode to our card CSD structure.
125 */
126static int mmc_decode_csd(struct mmc_card *card)
127{
128 struct mmc_csd *csd = &card->csd;
129 unsigned int e, m, a, b;
130 u32 *resp = card->raw_csd;
131
132 /*
133 * We only understand CSD structure v1.1 and v1.2.
134 * v1.2 has extra information in bits 15, 11 and 10.
135 * We also support eMMC v4.4 & v4.41.
136 */
137 csd->structure = UNSTUFF_BITS(resp, 126, 2);
138 if (csd->structure == 0) {
139 pr_err("%s: unrecognised CSD structure version %d\n",
140 mmc_hostname(card->host), csd->structure);
141 return -EINVAL;
142 }
143
144 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
145 m = UNSTUFF_BITS(resp, 115, 4);
146 e = UNSTUFF_BITS(resp, 112, 3);
147 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
148 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
149
150 m = UNSTUFF_BITS(resp, 99, 4);
151 e = UNSTUFF_BITS(resp, 96, 3);
152 csd->max_dtr = tran_exp[e] * tran_mant[m];
153 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
154
155 e = UNSTUFF_BITS(resp, 47, 3);
156 m = UNSTUFF_BITS(resp, 62, 12);
157 csd->capacity = (1 + m) << (e + 2);
158
159 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
160 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
161 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
162 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
163 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
164 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
165 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
166
167 if (csd->write_blkbits >= 9) {
168 a = UNSTUFF_BITS(resp, 42, 5);
169 b = UNSTUFF_BITS(resp, 37, 5);
170 csd->erase_size = (a + 1) * (b + 1);
171 csd->erase_size <<= csd->write_blkbits - 9;
172 }
173
174 return 0;
175}
176
177/*
178 * Read extended CSD.
179 */
180static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
181{
182 int err;
183 u8 *ext_csd;
184
185 BUG_ON(!card);
186 BUG_ON(!new_ext_csd);
187
188 *new_ext_csd = NULL;
189
190 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
191 return 0;
192
193 /*
194 * As the ext_csd is so large and mostly unused, we don't store the
195 * raw block in mmc_card.
196 */
197 ext_csd = kmalloc(512, GFP_KERNEL);
198 if (!ext_csd) {
199 pr_err("%s: could not allocate a buffer to "
200 "receive the ext_csd.\n", mmc_hostname(card->host));
201 return -ENOMEM;
202 }
203
204 err = mmc_send_ext_csd(card, ext_csd);
205 if (err) {
206 kfree(ext_csd);
207 *new_ext_csd = NULL;
208
209 /* If the host or the card can't do the switch,
210 * fail more gracefully. */
211 if ((err != -EINVAL)
212 && (err != -ENOSYS)
213 && (err != -EFAULT))
214 return err;
215
216 /*
217 * High capacity cards should have this "magic" size
218 * stored in their CSD.
219 */
220 if (card->csd.capacity == (4096 * 512)) {
221 pr_err("%s: unable to read EXT_CSD "
222 "on a possible high capacity card. "
223 "Card will be ignored.\n",
224 mmc_hostname(card->host));
225 } else {
226 pr_warning("%s: unable to read "
227 "EXT_CSD, performance might "
228 "suffer.\n",
229 mmc_hostname(card->host));
230 err = 0;
231 }
232 } else
233 *new_ext_csd = ext_csd;
234
235 return err;
236}
237
238static void mmc_select_card_type(struct mmc_card *card)
239{
240 struct mmc_host *host = card->host;
241 u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
242 unsigned int caps = host->caps, caps2 = host->caps2;
243 unsigned int hs_max_dtr = 0;
244
245 if (card_type & EXT_CSD_CARD_TYPE_26)
246 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
247
248 if (caps & MMC_CAP_MMC_HIGHSPEED &&
249 card_type & EXT_CSD_CARD_TYPE_52)
250 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
251
252 if ((caps & MMC_CAP_1_8V_DDR &&
253 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
254 (caps & MMC_CAP_1_2V_DDR &&
255 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
256 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
257
258 if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
259 card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
260 (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
261 card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
262 hs_max_dtr = MMC_HS200_MAX_DTR;
263
264 card->ext_csd.hs_max_dtr = hs_max_dtr;
265 card->ext_csd.card_type = card_type;
266}
267
268/*
269 * Decode extended CSD.
270 */
271static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
272{
273 int err = 0, idx;
274 unsigned int part_size;
275 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
276
277 BUG_ON(!card);
278
279 if (!ext_csd)
280 return 0;
281
282 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
283 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
284 if (card->csd.structure == 3) {
285 if (card->ext_csd.raw_ext_csd_structure > 2) {
286 pr_err("%s: unrecognised EXT_CSD structure "
287 "version %d\n", mmc_hostname(card->host),
288 card->ext_csd.raw_ext_csd_structure);
289 err = -EINVAL;
290 goto out;
291 }
292 }
293
294 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
295 if (card->ext_csd.rev > 6) {
296 pr_err("%s: unrecognised EXT_CSD revision %d\n",
297 mmc_hostname(card->host), card->ext_csd.rev);
298 err = -EINVAL;
299 goto out;
300 }
301
302 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
303 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
304 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
305 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
306 if (card->ext_csd.rev >= 2) {
307 card->ext_csd.sectors =
308 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
309 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
310 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
311 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
312
313 /* Cards with density > 2GiB are sector addressed */
314 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
315 mmc_card_set_blockaddr(card);
316 }
317
318 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
319 mmc_select_card_type(card);
320
321 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
322 card->ext_csd.raw_erase_timeout_mult =
323 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
324 card->ext_csd.raw_hc_erase_grp_size =
325 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
326 if (card->ext_csd.rev >= 3) {
327 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
328 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
329
330 /* EXT_CSD value is in units of 10ms, but we store in ms */
331 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
332
333 /* Sleep / awake timeout in 100ns units */
334 if (sa_shift > 0 && sa_shift <= 0x17)
335 card->ext_csd.sa_timeout =
336 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
337 card->ext_csd.erase_group_def =
338 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
339 card->ext_csd.hc_erase_timeout = 300 *
340 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
341 card->ext_csd.hc_erase_size =
342 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
343
344 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
345
346 /*
347 * There are two boot regions of equal size, defined in
348 * multiples of 128K.
349 */
350 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
351 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
352 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
353 mmc_part_add(card, part_size,
354 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
355 "boot%d", idx, true,
356 MMC_BLK_DATA_AREA_BOOT);
357 }
358 }
359 }
360
361 card->ext_csd.raw_hc_erase_gap_size =
362 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
363 card->ext_csd.raw_sec_trim_mult =
364 ext_csd[EXT_CSD_SEC_TRIM_MULT];
365 card->ext_csd.raw_sec_erase_mult =
366 ext_csd[EXT_CSD_SEC_ERASE_MULT];
367 card->ext_csd.raw_sec_feature_support =
368 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
369 card->ext_csd.raw_trim_mult =
370 ext_csd[EXT_CSD_TRIM_MULT];
371 if (card->ext_csd.rev >= 4) {
372 /*
373 * Enhanced area feature support -- check whether the eMMC
374 * card has the Enhanced area enabled. If so, export enhanced
375 * area offset and size to user by adding sysfs interface.
376 */
377 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
378 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
379 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
380 hc_erase_grp_sz =
381 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
382 hc_wp_grp_sz =
383 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
384
385 card->ext_csd.enhanced_area_en = 1;
386 /*
387 * calculate the enhanced data area offset, in bytes
388 */
389 card->ext_csd.enhanced_area_offset =
390 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
391 (ext_csd[137] << 8) + ext_csd[136];
392 if (mmc_card_blockaddr(card))
393 card->ext_csd.enhanced_area_offset <<= 9;
394 /*
395 * calculate the enhanced data area size, in kilobytes
396 */
397 card->ext_csd.enhanced_area_size =
398 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
399 ext_csd[140];
400 card->ext_csd.enhanced_area_size *=
401 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
402 card->ext_csd.enhanced_area_size <<= 9;
403 } else {
404 /*
405 * If the enhanced area is not enabled, disable these
406 * device attributes.
407 */
408 card->ext_csd.enhanced_area_offset = -EINVAL;
409 card->ext_csd.enhanced_area_size = -EINVAL;
410 }
411
412 /*
413 * General purpose partition feature support --
414 * If ext_csd has the size of general purpose partitions,
415 * set size, part_cfg, partition name in mmc_part.
416 */
417 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
418 EXT_CSD_PART_SUPPORT_PART_EN) {
419 if (card->ext_csd.enhanced_area_en != 1) {
420 hc_erase_grp_sz =
421 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
422 hc_wp_grp_sz =
423 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
424
425 card->ext_csd.enhanced_area_en = 1;
426 }
427
428 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
429 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
430 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
431 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
432 continue;
433 part_size =
434 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
435 << 16) +
436 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
437 << 8) +
438 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
439 part_size *= (size_t)(hc_erase_grp_sz *
440 hc_wp_grp_sz);
441 mmc_part_add(card, part_size << 19,
442 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
443 "gp%d", idx, false,
444 MMC_BLK_DATA_AREA_GP);
445 }
446 }
447 card->ext_csd.sec_trim_mult =
448 ext_csd[EXT_CSD_SEC_TRIM_MULT];
449 card->ext_csd.sec_erase_mult =
450 ext_csd[EXT_CSD_SEC_ERASE_MULT];
451 card->ext_csd.sec_feature_support =
452 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
453 card->ext_csd.trim_timeout = 300 *
454 ext_csd[EXT_CSD_TRIM_MULT];
455
456 /*
457 * Note that the call to mmc_part_add above defaults to read
458 * only. If this default assumption is changed, the call must
459 * take into account the value of boot_locked below.
460 */
461 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
462 card->ext_csd.boot_ro_lockable = true;
463 }
464
465 if (card->ext_csd.rev >= 5) {
466 /* check whether the eMMC card supports HPI */
467 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
468 card->ext_csd.hpi = 1;
469 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
470 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
471 else
472 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
473 /*
474 * Indicate the maximum timeout to close
475 * a command interrupted by HPI
476 */
477 card->ext_csd.out_of_int_time =
478 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
479 }
480
481 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
482 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
483 }
484
485 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
486 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
487 card->erased_byte = 0xFF;
488 else
489 card->erased_byte = 0x0;
490
491 /* eMMC v4.5 or later */
492 if (card->ext_csd.rev >= 6) {
493 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
494
495 card->ext_csd.generic_cmd6_time = 10 *
496 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
497 card->ext_csd.power_off_longtime = 10 *
498 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
499
500 card->ext_csd.cache_size =
501 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
502 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
503 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
504 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
505
506 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
507 card->ext_csd.data_sector_size = 4096;
508 else
509 card->ext_csd.data_sector_size = 512;
510
511 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
512 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
513 card->ext_csd.data_tag_unit_size =
514 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
515 (card->ext_csd.data_sector_size);
516 } else {
517 card->ext_csd.data_tag_unit_size = 0;
518 }
519 } else {
520 card->ext_csd.data_sector_size = 512;
521 }
522
523out:
524 return err;
525}
526
527static inline void mmc_free_ext_csd(u8 *ext_csd)
528{
529 kfree(ext_csd);
530}
531
532
533static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
534{
535 u8 *bw_ext_csd;
536 int err;
537
538 if (bus_width == MMC_BUS_WIDTH_1)
539 return 0;
540
541 err = mmc_get_ext_csd(card, &bw_ext_csd);
542
543 if (err || bw_ext_csd == NULL) {
544 err = -EINVAL;
545 goto out;
546 }
547
548 /* only compare read only fields */
549 err = !((card->ext_csd.raw_partition_support ==
550 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
551 (card->ext_csd.raw_erased_mem_count ==
552 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
553 (card->ext_csd.rev ==
554 bw_ext_csd[EXT_CSD_REV]) &&
555 (card->ext_csd.raw_ext_csd_structure ==
556 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
557 (card->ext_csd.raw_card_type ==
558 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
559 (card->ext_csd.raw_s_a_timeout ==
560 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
561 (card->ext_csd.raw_hc_erase_gap_size ==
562 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
563 (card->ext_csd.raw_erase_timeout_mult ==
564 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
565 (card->ext_csd.raw_hc_erase_grp_size ==
566 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
567 (card->ext_csd.raw_sec_trim_mult ==
568 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
569 (card->ext_csd.raw_sec_erase_mult ==
570 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
571 (card->ext_csd.raw_sec_feature_support ==
572 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
573 (card->ext_csd.raw_trim_mult ==
574 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
575 (card->ext_csd.raw_sectors[0] ==
576 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
577 (card->ext_csd.raw_sectors[1] ==
578 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
579 (card->ext_csd.raw_sectors[2] ==
580 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
581 (card->ext_csd.raw_sectors[3] ==
582 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
583 if (err)
584 err = -EINVAL;
585
586out:
587 mmc_free_ext_csd(bw_ext_csd);
588 return err;
589}
590
591MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
592 card->raw_cid[2], card->raw_cid[3]);
593MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
594 card->raw_csd[2], card->raw_csd[3]);
595MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
596MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
597MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
598MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
599MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
600MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
601MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
602MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
603MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
604MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
605 card->ext_csd.enhanced_area_offset);
606MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
607
608static struct attribute *mmc_std_attrs[] = {
609 &dev_attr_cid.attr,
610 &dev_attr_csd.attr,
611 &dev_attr_date.attr,
612 &dev_attr_erase_size.attr,
613 &dev_attr_preferred_erase_size.attr,
614 &dev_attr_fwrev.attr,
615 &dev_attr_hwrev.attr,
616 &dev_attr_manfid.attr,
617 &dev_attr_name.attr,
618 &dev_attr_oemid.attr,
619 &dev_attr_serial.attr,
620 &dev_attr_enhanced_area_offset.attr,
621 &dev_attr_enhanced_area_size.attr,
622 NULL,
623};
624
625static struct attribute_group mmc_std_attr_group = {
626 .attrs = mmc_std_attrs,
627};
628
629static const struct attribute_group *mmc_attr_groups[] = {
630 &mmc_std_attr_group,
631 NULL,
632};
633
634static struct device_type mmc_type = {
635 .groups = mmc_attr_groups,
636};
637
638/*
639 * Select the PowerClass for the current bus width
640 * If power class is defined for 4/8 bit bus in the
641 * extended CSD register, select it by executing the
642 * mmc_switch command.
643 */
644static int mmc_select_powerclass(struct mmc_card *card,
645 unsigned int bus_width, u8 *ext_csd)
646{
647 int err = 0;
648 unsigned int pwrclass_val;
649 unsigned int index = 0;
650 struct mmc_host *host;
651
652 BUG_ON(!card);
653
654 host = card->host;
655 BUG_ON(!host);
656
657 if (ext_csd == NULL)
658 return 0;
659
660 /* Power class selection is supported for versions >= 4.0 */
661 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
662 return 0;
663
664 /* Power class values are defined only for 4/8 bit bus */
665 if (bus_width == EXT_CSD_BUS_WIDTH_1)
666 return 0;
667
668 switch (1 << host->ios.vdd) {
669 case MMC_VDD_165_195:
670 if (host->ios.clock <= 26000000)
671 index = EXT_CSD_PWR_CL_26_195;
672 else if (host->ios.clock <= 52000000)
673 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
674 EXT_CSD_PWR_CL_52_195 :
675 EXT_CSD_PWR_CL_DDR_52_195;
676 else if (host->ios.clock <= 200000000)
677 index = EXT_CSD_PWR_CL_200_195;
678 break;
679 case MMC_VDD_27_28:
680 case MMC_VDD_28_29:
681 case MMC_VDD_29_30:
682 case MMC_VDD_30_31:
683 case MMC_VDD_31_32:
684 case MMC_VDD_32_33:
685 case MMC_VDD_33_34:
686 case MMC_VDD_34_35:
687 case MMC_VDD_35_36:
688 if (host->ios.clock <= 26000000)
689 index = EXT_CSD_PWR_CL_26_360;
690 else if (host->ios.clock <= 52000000)
691 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
692 EXT_CSD_PWR_CL_52_360 :
693 EXT_CSD_PWR_CL_DDR_52_360;
694 else if (host->ios.clock <= 200000000)
695 index = EXT_CSD_PWR_CL_200_360;
696 break;
697 default:
698 pr_warning("%s: Voltage range not supported "
699 "for power class.\n", mmc_hostname(host));
700 return -EINVAL;
701 }
702
703 pwrclass_val = ext_csd[index];
704
705 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
706 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
707 EXT_CSD_PWR_CL_8BIT_SHIFT;
708 else
709 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
710 EXT_CSD_PWR_CL_4BIT_SHIFT;
711
712 /* If the power class is different from the default value */
713 if (pwrclass_val > 0) {
714 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
715 EXT_CSD_POWER_CLASS,
716 pwrclass_val,
717 card->ext_csd.generic_cmd6_time);
718 }
719
720 return err;
721}
722
723/*
724 * Selects the desired buswidth and switch to the HS200 mode
725 * if bus width set without error
726 */
727static int mmc_select_hs200(struct mmc_card *card)
728{
729 int idx, err = -EINVAL;
730 struct mmc_host *host;
731 static unsigned ext_csd_bits[] = {
732 EXT_CSD_BUS_WIDTH_4,
733 EXT_CSD_BUS_WIDTH_8,
734 };
735 static unsigned bus_widths[] = {
736 MMC_BUS_WIDTH_4,
737 MMC_BUS_WIDTH_8,
738 };
739
740 BUG_ON(!card);
741
742 host = card->host;
743
744 if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
745 host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
746 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0);
747
748 if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
749 host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
750 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 0);
751
752 /* If fails try again during next card power cycle */
753 if (err)
754 goto err;
755
756 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
757
758 /*
759 * Unlike SD, MMC cards dont have a configuration register to notify
760 * supported bus width. So bus test command should be run to identify
761 * the supported bus width or compare the ext csd values of current
762 * bus width and ext csd values of 1 bit mode read earlier.
763 */
764 for (; idx >= 0; idx--) {
765
766 /*
767 * Host is capable of 8bit transfer, then switch
768 * the device to work in 8bit transfer mode. If the
769 * mmc switch command returns error then switch to
770 * 4bit transfer mode. On success set the corresponding
771 * bus width on the host.
772 */
773 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
774 EXT_CSD_BUS_WIDTH,
775 ext_csd_bits[idx],
776 card->ext_csd.generic_cmd6_time);
777 if (err)
778 continue;
779
780 mmc_set_bus_width(card->host, bus_widths[idx]);
781
782 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
783 err = mmc_compare_ext_csds(card, bus_widths[idx]);
784 else
785 err = mmc_bus_test(card, bus_widths[idx]);
786 if (!err)
787 break;
788 }
789
790 /* switch to HS200 mode if bus width set successfully */
791 if (!err)
792 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
793 EXT_CSD_HS_TIMING, 2, 0);
794err:
795 return err;
796}
797
798/*
799 * Handle the detection and initialisation of a card.
800 *
801 * In the case of a resume, "oldcard" will contain the card
802 * we're trying to reinitialise.
803 */
804static int mmc_init_card(struct mmc_host *host, u32 ocr,
805 struct mmc_card *oldcard)
806{
807 struct mmc_card *card;
808 int err, ddr = 0;
809 u32 cid[4];
810 unsigned int max_dtr;
811 u32 rocr;
812 u8 *ext_csd = NULL;
813
814 BUG_ON(!host);
815 WARN_ON(!host->claimed);
816
817 /* Set correct bus mode for MMC before attempting init */
818 if (!mmc_host_is_spi(host))
819 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
820
821 /* Initialization should be done at 3.3 V I/O voltage. */
822 mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
823
824 /*
825 * Since we're changing the OCR value, we seem to
826 * need to tell some cards to go back to the idle
827 * state. We wait 1ms to give cards time to
828 * respond.
829 * mmc_go_idle is needed for eMMC that are asleep
830 */
831 mmc_go_idle(host);
832
833 /* The extra bit indicates that we support high capacity */
834 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
835 if (err)
836 goto err;
837
838 /*
839 * For SPI, enable CRC as appropriate.
840 */
841 if (mmc_host_is_spi(host)) {
842 err = mmc_spi_set_crc(host, use_spi_crc);
843 if (err)
844 goto err;
845 }
846
847 /*
848 * Fetch CID from card.
849 */
850 if (mmc_host_is_spi(host))
851 err = mmc_send_cid(host, cid);
852 else
853 err = mmc_all_send_cid(host, cid);
854 if (err)
855 goto err;
856
857 if (oldcard) {
858 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
859 err = -ENOENT;
860 goto err;
861 }
862
863 card = oldcard;
864 } else {
865 /*
866 * Allocate card structure.
867 */
868 card = mmc_alloc_card(host, &mmc_type);
869 if (IS_ERR(card)) {
870 err = PTR_ERR(card);
871 goto err;
872 }
873
874 card->type = MMC_TYPE_MMC;
875 card->rca = 1;
876 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
877 }
878
879 /*
880 * For native busses: set card RCA and quit open drain mode.
881 */
882 if (!mmc_host_is_spi(host)) {
883 err = mmc_set_relative_addr(card);
884 if (err)
885 goto free_card;
886
887 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
888 }
889
890 if (!oldcard) {
891 /*
892 * Fetch CSD from card.
893 */
894 err = mmc_send_csd(card, card->raw_csd);
895 if (err)
896 goto free_card;
897
898 err = mmc_decode_csd(card);
899 if (err)
900 goto free_card;
901 err = mmc_decode_cid(card);
902 if (err)
903 goto free_card;
904 }
905
906 /*
907 * Select card, as all following commands rely on that.
908 */
909 if (!mmc_host_is_spi(host)) {
910 err = mmc_select_card(card);
911 if (err)
912 goto free_card;
913 }
914
915 if (!oldcard) {
916 /*
917 * Fetch and process extended CSD.
918 */
919
920 err = mmc_get_ext_csd(card, &ext_csd);
921 if (err)
922 goto free_card;
923 err = mmc_read_ext_csd(card, ext_csd);
924 if (err)
925 goto free_card;
926
927 /* If doing byte addressing, check if required to do sector
928 * addressing. Handle the case of <2GB cards needing sector
929 * addressing. See section 8.1 JEDEC Standard JED84-A441;
930 * ocr register has bit 30 set for sector addressing.
931 */
932 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
933 mmc_card_set_blockaddr(card);
934
935 /* Erase size depends on CSD and Extended CSD */
936 mmc_set_erase_size(card);
937 }
938
939 /*
940 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
941 * bit. This bit will be lost every time after a reset or power off.
942 */
943 if (card->ext_csd.enhanced_area_en ||
944 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
945 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
946 EXT_CSD_ERASE_GROUP_DEF, 1,
947 card->ext_csd.generic_cmd6_time);
948
949 if (err && err != -EBADMSG)
950 goto free_card;
951
952 if (err) {
953 err = 0;
954 /*
955 * Just disable enhanced area off & sz
956 * will try to enable ERASE_GROUP_DEF
957 * during next time reinit
958 */
959 card->ext_csd.enhanced_area_offset = -EINVAL;
960 card->ext_csd.enhanced_area_size = -EINVAL;
961 } else {
962 card->ext_csd.erase_group_def = 1;
963 /*
964 * enable ERASE_GRP_DEF successfully.
965 * This will affect the erase size, so
966 * here need to reset erase size
967 */
968 mmc_set_erase_size(card);
969 }
970 }
971
972 /*
973 * Ensure eMMC user default partition is enabled
974 */
975 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
976 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
977 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
978 card->ext_csd.part_config,
979 card->ext_csd.part_time);
980 if (err && err != -EBADMSG)
981 goto free_card;
982 }
983
984 /*
985 * If the host supports the power_off_notify capability then
986 * set the notification byte in the ext_csd register of device
987 */
988 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
989 (card->ext_csd.rev >= 6)) {
990 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
991 EXT_CSD_POWER_OFF_NOTIFICATION,
992 EXT_CSD_POWER_ON,
993 card->ext_csd.generic_cmd6_time);
994 if (err && err != -EBADMSG)
995 goto free_card;
996
997 /*
998 * The err can be -EBADMSG or 0,
999 * so check for success and update the flag
1000 */
1001 if (!err)
1002 card->poweroff_notify_state = MMC_POWERED_ON;
1003 }
1004
1005 /*
1006 * Activate high speed (if supported)
1007 */
1008 if (card->ext_csd.hs_max_dtr != 0) {
1009 err = 0;
1010 if (card->ext_csd.hs_max_dtr > 52000000 &&
1011 host->caps2 & MMC_CAP2_HS200)
1012 err = mmc_select_hs200(card);
1013 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1014 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1015 EXT_CSD_HS_TIMING, 1,
1016 card->ext_csd.generic_cmd6_time);
1017
1018 if (err && err != -EBADMSG)
1019 goto free_card;
1020
1021 if (err) {
1022 pr_warning("%s: switch to highspeed failed\n",
1023 mmc_hostname(card->host));
1024 err = 0;
1025 } else {
1026 if (card->ext_csd.hs_max_dtr > 52000000 &&
1027 host->caps2 & MMC_CAP2_HS200) {
1028 mmc_card_set_hs200(card);
1029 mmc_set_timing(card->host,
1030 MMC_TIMING_MMC_HS200);
1031 } else {
1032 mmc_card_set_highspeed(card);
1033 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1034 }
1035 }
1036 }
1037
1038 /*
1039 * Compute bus speed.
1040 */
1041 max_dtr = (unsigned int)-1;
1042
1043 if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1044 if (max_dtr > card->ext_csd.hs_max_dtr)
1045 max_dtr = card->ext_csd.hs_max_dtr;
1046 } else if (max_dtr > card->csd.max_dtr) {
1047 max_dtr = card->csd.max_dtr;
1048 }
1049
1050 mmc_set_clock(host, max_dtr);
1051
1052 /*
1053 * Indicate DDR mode (if supported).
1054 */
1055 if (mmc_card_highspeed(card)) {
1056 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1057 && ((host->caps & (MMC_CAP_1_8V_DDR |
1058 MMC_CAP_UHS_DDR50))
1059 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
1060 ddr = MMC_1_8V_DDR_MODE;
1061 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1062 && ((host->caps & (MMC_CAP_1_2V_DDR |
1063 MMC_CAP_UHS_DDR50))
1064 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
1065 ddr = MMC_1_2V_DDR_MODE;
1066 }
1067
1068 /*
1069 * Indicate HS200 SDR mode (if supported).
1070 */
1071 if (mmc_card_hs200(card)) {
1072 u32 ext_csd_bits;
1073 u32 bus_width = card->host->ios.bus_width;
1074
1075 /*
1076 * For devices supporting HS200 mode, the bus width has
1077 * to be set before executing the tuning function. If
1078 * set before tuning, then device will respond with CRC
1079 * errors for responses on CMD line. So for HS200 the
1080 * sequence will be
1081 * 1. set bus width 4bit / 8 bit (1 bit not supported)
1082 * 2. switch to HS200 mode
1083 * 3. set the clock to > 52Mhz <=200MHz and
1084 * 4. execute tuning for HS200
1085 */
1086 if ((host->caps2 & MMC_CAP2_HS200) &&
1087 card->host->ops->execute_tuning) {
1088 mmc_host_clk_hold(card->host);
1089 err = card->host->ops->execute_tuning(card->host,
1090 MMC_SEND_TUNING_BLOCK_HS200);
1091 mmc_host_clk_release(card->host);
1092 }
1093 if (err) {
1094 pr_warning("%s: tuning execution failed\n",
1095 mmc_hostname(card->host));
1096 goto err;
1097 }
1098
1099 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1100 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1101 err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
1102 if (err)
1103 pr_warning("%s: power class selection to bus width %d"
1104 " failed\n", mmc_hostname(card->host),
1105 1 << bus_width);
1106 }
1107
1108 /*
1109 * Activate wide bus and DDR (if supported).
1110 */
1111 if (!mmc_card_hs200(card) &&
1112 (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1113 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1114 static unsigned ext_csd_bits[][2] = {
1115 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1116 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1117 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1118 };
1119 static unsigned bus_widths[] = {
1120 MMC_BUS_WIDTH_8,
1121 MMC_BUS_WIDTH_4,
1122 MMC_BUS_WIDTH_1
1123 };
1124 unsigned idx, bus_width = 0;
1125
1126 if (host->caps & MMC_CAP_8_BIT_DATA)
1127 idx = 0;
1128 else
1129 idx = 1;
1130 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1131 bus_width = bus_widths[idx];
1132 if (bus_width == MMC_BUS_WIDTH_1)
1133 ddr = 0; /* no DDR for 1-bit width */
1134 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
1135 ext_csd);
1136 if (err)
1137 pr_warning("%s: power class selection to "
1138 "bus width %d failed\n",
1139 mmc_hostname(card->host),
1140 1 << bus_width);
1141
1142 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1143 EXT_CSD_BUS_WIDTH,
1144 ext_csd_bits[idx][0],
1145 card->ext_csd.generic_cmd6_time);
1146 if (!err) {
1147 mmc_set_bus_width(card->host, bus_width);
1148
1149 /*
1150 * If controller can't handle bus width test,
1151 * compare ext_csd previously read in 1 bit mode
1152 * against ext_csd at new bus width
1153 */
1154 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1155 err = mmc_compare_ext_csds(card,
1156 bus_width);
1157 else
1158 err = mmc_bus_test(card, bus_width);
1159 if (!err)
1160 break;
1161 }
1162 }
1163
1164 if (!err && ddr) {
1165 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1166 ext_csd);
1167 if (err)
1168 pr_warning("%s: power class selection to "
1169 "bus width %d ddr %d failed\n",
1170 mmc_hostname(card->host),
1171 1 << bus_width, ddr);
1172
1173 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1174 EXT_CSD_BUS_WIDTH,
1175 ext_csd_bits[idx][1],
1176 card->ext_csd.generic_cmd6_time);
1177 }
1178 if (err) {
1179 pr_warning("%s: switch to bus width %d ddr %d "
1180 "failed\n", mmc_hostname(card->host),
1181 1 << bus_width, ddr);
1182 goto free_card;
1183 } else if (ddr) {
1184 /*
1185 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1186 * signaling.
1187 *
1188 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1189 *
1190 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1191 * in the JEDEC spec for DDR.
1192 *
1193 * Do not force change in vccq since we are obviously
1194 * working and no change to vccq is needed.
1195 *
1196 * WARNING: eMMC rules are NOT the same as SD DDR
1197 */
1198 if (ddr == MMC_1_2V_DDR_MODE) {
1199 err = mmc_set_signal_voltage(host,
1200 MMC_SIGNAL_VOLTAGE_120, 0);
1201 if (err)
1202 goto err;
1203 }
1204 mmc_card_set_ddr_mode(card);
1205 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1206 mmc_set_bus_width(card->host, bus_width);
1207 }
1208 }
1209
1210 /*
1211 * Enable HPI feature (if supported)
1212 */
1213 if (card->ext_csd.hpi) {
1214 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1215 EXT_CSD_HPI_MGMT, 1,
1216 card->ext_csd.generic_cmd6_time);
1217 if (err && err != -EBADMSG)
1218 goto free_card;
1219 if (err) {
1220 pr_warning("%s: Enabling HPI failed\n",
1221 mmc_hostname(card->host));
1222 err = 0;
1223 } else
1224 card->ext_csd.hpi_en = 1;
1225 }
1226
1227 /*
1228 * If cache size is higher than 0, this indicates
1229 * the existence of cache and it can be turned on.
1230 */
1231 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1232 card->ext_csd.cache_size > 0) {
1233 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1234 EXT_CSD_CACHE_CTRL, 1,
1235 card->ext_csd.generic_cmd6_time);
1236 if (err && err != -EBADMSG)
1237 goto free_card;
1238
1239 /*
1240 * Only if no error, cache is turned on successfully.
1241 */
1242 if (err) {
1243 pr_warning("%s: Cache is supported, "
1244 "but failed to turn on (%d)\n",
1245 mmc_hostname(card->host), err);
1246 card->ext_csd.cache_ctrl = 0;
1247 err = 0;
1248 } else {
1249 card->ext_csd.cache_ctrl = 1;
1250 }
1251 }
1252
1253 if (!oldcard)
1254 host->card = card;
1255
1256 mmc_free_ext_csd(ext_csd);
1257 return 0;
1258
1259free_card:
1260 if (!oldcard)
1261 mmc_remove_card(card);
1262err:
1263 mmc_free_ext_csd(ext_csd);
1264
1265 return err;
1266}
1267
1268/*
1269 * Host is being removed. Free up the current card.
1270 */
1271static void mmc_remove(struct mmc_host *host)
1272{
1273 BUG_ON(!host);
1274 BUG_ON(!host->card);
1275
1276 mmc_remove_card(host->card);
1277 host->card = NULL;
1278}
1279
1280/*
1281 * Card detection - card is alive.
1282 */
1283static int mmc_alive(struct mmc_host *host)
1284{
1285 return mmc_send_status(host->card, NULL);
1286}
1287
1288/*
1289 * Card detection callback from host.
1290 */
1291static void mmc_detect(struct mmc_host *host)
1292{
1293 int err;
1294
1295 BUG_ON(!host);
1296 BUG_ON(!host->card);
1297
1298 mmc_claim_host(host);
1299
1300 /*
1301 * Just check if our card has been removed.
1302 */
1303 err = _mmc_detect_card_removed(host);
1304
1305 mmc_release_host(host);
1306
1307 if (err) {
1308 mmc_remove(host);
1309
1310 mmc_claim_host(host);
1311 mmc_detach_bus(host);
1312 mmc_power_off(host);
1313 mmc_release_host(host);
1314 }
1315}
1316
1317/*
1318 * Suspend callback from host.
1319 */
1320static int mmc_suspend(struct mmc_host *host)
1321{
1322 int err = 0;
1323
1324 BUG_ON(!host);
1325 BUG_ON(!host->card);
1326
1327 mmc_claim_host(host);
1328 if (mmc_card_can_sleep(host)) {
1329 err = mmc_card_sleep(host);
1330 if (!err)
1331 mmc_card_set_sleep(host->card);
1332 } else if (!mmc_host_is_spi(host))
1333 err = mmc_deselect_cards(host);
1334 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1335 mmc_release_host(host);
1336
1337 return err;
1338}
1339
1340/*
1341 * Resume callback from host.
1342 *
1343 * This function tries to determine if the same card is still present
1344 * and, if so, restore all state to it.
1345 */
1346static int mmc_resume(struct mmc_host *host)
1347{
1348 int err;
1349
1350 BUG_ON(!host);
1351 BUG_ON(!host->card);
1352
1353 mmc_claim_host(host);
1354 if (mmc_card_is_sleep(host->card)) {
1355 err = mmc_card_awake(host);
1356 mmc_card_clr_sleep(host->card);
1357 } else
1358 err = mmc_init_card(host, host->ocr, host->card);
1359 mmc_release_host(host);
1360
1361 return err;
1362}
1363
1364static int mmc_power_restore(struct mmc_host *host)
1365{
1366 int ret;
1367
1368 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1369 mmc_card_clr_sleep(host->card);
1370 mmc_claim_host(host);
1371 ret = mmc_init_card(host, host->ocr, host->card);
1372 mmc_release_host(host);
1373
1374 return ret;
1375}
1376
1377static int mmc_sleep(struct mmc_host *host)
1378{
1379 struct mmc_card *card = host->card;
1380 int err = -ENOSYS;
1381
1382 if (card && card->ext_csd.rev >= 3) {
1383 err = mmc_card_sleepawake(host, 1);
1384 if (err < 0)
1385 pr_debug("%s: Error %d while putting card into sleep",
1386 mmc_hostname(host), err);
1387 }
1388
1389 return err;
1390}
1391
1392static int mmc_awake(struct mmc_host *host)
1393{
1394 struct mmc_card *card = host->card;
1395 int err = -ENOSYS;
1396
1397 if (card && card->ext_csd.rev >= 3) {
1398 err = mmc_card_sleepawake(host, 0);
1399 if (err < 0)
1400 pr_debug("%s: Error %d while awaking sleeping card",
1401 mmc_hostname(host), err);
1402 }
1403
1404 return err;
1405}
1406
1407static const struct mmc_bus_ops mmc_ops = {
1408 .awake = mmc_awake,
1409 .sleep = mmc_sleep,
1410 .remove = mmc_remove,
1411 .detect = mmc_detect,
1412 .suspend = NULL,
1413 .resume = NULL,
1414 .power_restore = mmc_power_restore,
1415 .alive = mmc_alive,
1416};
1417
1418static const struct mmc_bus_ops mmc_ops_unsafe = {
1419 .awake = mmc_awake,
1420 .sleep = mmc_sleep,
1421 .remove = mmc_remove,
1422 .detect = mmc_detect,
1423 .suspend = mmc_suspend,
1424 .resume = mmc_resume,
1425 .power_restore = mmc_power_restore,
1426 .alive = mmc_alive,
1427};
1428
1429static void mmc_attach_bus_ops(struct mmc_host *host)
1430{
1431 const struct mmc_bus_ops *bus_ops;
1432
1433 if (!mmc_card_is_removable(host))
1434 bus_ops = &mmc_ops_unsafe;
1435 else
1436 bus_ops = &mmc_ops;
1437 mmc_attach_bus(host, bus_ops);
1438}
1439
1440/*
1441 * Starting point for MMC card init.
1442 */
1443int mmc_attach_mmc(struct mmc_host *host)
1444{
1445 int err;
1446 u32 ocr;
1447
1448 BUG_ON(!host);
1449 WARN_ON(!host->claimed);
1450
1451 /* Set correct bus mode for MMC before attempting attach */
1452 if (!mmc_host_is_spi(host))
1453 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1454
1455 err = mmc_send_op_cond(host, 0, &ocr);
1456 if (err)
1457 return err;
1458
1459 mmc_attach_bus_ops(host);
1460 if (host->ocr_avail_mmc)
1461 host->ocr_avail = host->ocr_avail_mmc;
1462
1463 /*
1464 * We need to get OCR a different way for SPI.
1465 */
1466 if (mmc_host_is_spi(host)) {
1467 err = mmc_spi_read_ocr(host, 1, &ocr);
1468 if (err)
1469 goto err;
1470 }
1471
1472 /*
1473 * Sanity check the voltages that the card claims to
1474 * support.
1475 */
1476 if (ocr & 0x7F) {
1477 pr_warning("%s: card claims to support voltages "
1478 "below the defined range. These will be ignored.\n",
1479 mmc_hostname(host));
1480 ocr &= ~0x7F;
1481 }
1482
1483 host->ocr = mmc_select_voltage(host, ocr);
1484
1485 /*
1486 * Can we support the voltage of the card?
1487 */
1488 if (!host->ocr) {
1489 err = -EINVAL;
1490 goto err;
1491 }
1492
1493 /*
1494 * Detect and init the card.
1495 */
1496 err = mmc_init_card(host, host->ocr, NULL);
1497 if (err)
1498 goto err;
1499
1500 mmc_release_host(host);
1501 err = mmc_add_card(host->card);
1502 mmc_claim_host(host);
1503 if (err)
1504 goto remove_card;
1505
1506 return 0;
1507
1508remove_card:
1509 mmc_release_host(host);
1510 mmc_remove_card(host->card);
1511 mmc_claim_host(host);
1512 host->card = NULL;
1513err:
1514 mmc_detach_bus(host);
1515
1516 pr_err("%s: error %d whilst initialising MMC card\n",
1517 mmc_hostname(host), err);
1518
1519 return err;
1520}
1/*
2 * linux/drivers/mmc/core/mmc.c
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>
14#include <linux/of.h>
15#include <linux/slab.h>
16#include <linux/stat.h>
17#include <linux/pm_runtime.h>
18
19#include <linux/mmc/host.h>
20#include <linux/mmc/card.h>
21#include <linux/mmc/mmc.h>
22
23#include "core.h"
24#include "host.h"
25#include "bus.h"
26#include "mmc_ops.h"
27#include "sd_ops.h"
28
29#define DEFAULT_CMD6_TIMEOUT_MS 500
30
31static const unsigned int tran_exp[] = {
32 10000, 100000, 1000000, 10000000,
33 0, 0, 0, 0
34};
35
36static const unsigned char tran_mant[] = {
37 0, 10, 12, 13, 15, 20, 25, 30,
38 35, 40, 45, 50, 55, 60, 70, 80,
39};
40
41static const unsigned int tacc_exp[] = {
42 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
43};
44
45static const unsigned int tacc_mant[] = {
46 0, 10, 12, 13, 15, 20, 25, 30,
47 35, 40, 45, 50, 55, 60, 70, 80,
48};
49
50static const struct mmc_fixup mmc_ext_csd_fixups[] = {
51 /*
52 * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
53 * is used so disable the HPI feature for such buggy cards.
54 */
55 MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
56 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
57
58 END_FIXUP
59};
60
61#define UNSTUFF_BITS(resp,start,size) \
62 ({ \
63 const int __size = size; \
64 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
65 const int __off = 3 - ((start) / 32); \
66 const int __shft = (start) & 31; \
67 u32 __res; \
68 \
69 __res = resp[__off] >> __shft; \
70 if (__size + __shft > 32) \
71 __res |= resp[__off-1] << ((32 - __shft) % 32); \
72 __res & __mask; \
73 })
74
75/*
76 * Given the decoded CSD structure, decode the raw CID to our CID structure.
77 */
78static int mmc_decode_cid(struct mmc_card *card)
79{
80 u32 *resp = card->raw_cid;
81
82 /*
83 * The selection of the format here is based upon published
84 * specs from sandisk and from what people have reported.
85 */
86 switch (card->csd.mmca_vsn) {
87 case 0: /* MMC v1.0 - v1.2 */
88 case 1: /* MMC v1.4 */
89 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
90 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
91 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
92 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
93 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
94 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
95 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
96 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
97 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
98 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
102 break;
103
104 case 2: /* MMC v2.0 - v2.2 */
105 case 3: /* MMC v3.1 - v3.3 */
106 case 4: /* MMC v4 */
107 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
108 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
109 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
110 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
111 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
112 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
113 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
114 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
115 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
116 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
117 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
118 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
119 break;
120
121 default:
122 pr_err("%s: card has unknown MMCA version %d\n",
123 mmc_hostname(card->host), card->csd.mmca_vsn);
124 return -EINVAL;
125 }
126
127 return 0;
128}
129
130static void mmc_set_erase_size(struct mmc_card *card)
131{
132 if (card->ext_csd.erase_group_def & 1)
133 card->erase_size = card->ext_csd.hc_erase_size;
134 else
135 card->erase_size = card->csd.erase_size;
136
137 mmc_init_erase(card);
138}
139
140/*
141 * Given a 128-bit response, decode to our card CSD structure.
142 */
143static int mmc_decode_csd(struct mmc_card *card)
144{
145 struct mmc_csd *csd = &card->csd;
146 unsigned int e, m, a, b;
147 u32 *resp = card->raw_csd;
148
149 /*
150 * We only understand CSD structure v1.1 and v1.2.
151 * v1.2 has extra information in bits 15, 11 and 10.
152 * We also support eMMC v4.4 & v4.41.
153 */
154 csd->structure = UNSTUFF_BITS(resp, 126, 2);
155 if (csd->structure == 0) {
156 pr_err("%s: unrecognised CSD structure version %d\n",
157 mmc_hostname(card->host), csd->structure);
158 return -EINVAL;
159 }
160
161 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
162 m = UNSTUFF_BITS(resp, 115, 4);
163 e = UNSTUFF_BITS(resp, 112, 3);
164 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
165 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
166
167 m = UNSTUFF_BITS(resp, 99, 4);
168 e = UNSTUFF_BITS(resp, 96, 3);
169 csd->max_dtr = tran_exp[e] * tran_mant[m];
170 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
171
172 e = UNSTUFF_BITS(resp, 47, 3);
173 m = UNSTUFF_BITS(resp, 62, 12);
174 csd->capacity = (1 + m) << (e + 2);
175
176 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
177 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
178 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
179 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
180 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
181 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
182 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
183 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
184
185 if (csd->write_blkbits >= 9) {
186 a = UNSTUFF_BITS(resp, 42, 5);
187 b = UNSTUFF_BITS(resp, 37, 5);
188 csd->erase_size = (a + 1) * (b + 1);
189 csd->erase_size <<= csd->write_blkbits - 9;
190 }
191
192 return 0;
193}
194
195static void mmc_select_card_type(struct mmc_card *card)
196{
197 struct mmc_host *host = card->host;
198 u8 card_type = card->ext_csd.raw_card_type;
199 u32 caps = host->caps, caps2 = host->caps2;
200 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
201 unsigned int avail_type = 0;
202
203 if (caps & MMC_CAP_MMC_HIGHSPEED &&
204 card_type & EXT_CSD_CARD_TYPE_HS_26) {
205 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
206 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
207 }
208
209 if (caps & MMC_CAP_MMC_HIGHSPEED &&
210 card_type & EXT_CSD_CARD_TYPE_HS_52) {
211 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
212 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
213 }
214
215 if (caps & MMC_CAP_1_8V_DDR &&
216 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
217 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
218 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
219 }
220
221 if (caps & MMC_CAP_1_2V_DDR &&
222 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
223 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
224 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
225 }
226
227 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
228 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
229 hs200_max_dtr = MMC_HS200_MAX_DTR;
230 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
231 }
232
233 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
234 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
235 hs200_max_dtr = MMC_HS200_MAX_DTR;
236 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
237 }
238
239 if (caps2 & MMC_CAP2_HS400_1_8V &&
240 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
241 hs200_max_dtr = MMC_HS200_MAX_DTR;
242 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
243 }
244
245 if (caps2 & MMC_CAP2_HS400_1_2V &&
246 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
247 hs200_max_dtr = MMC_HS200_MAX_DTR;
248 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
249 }
250
251 if ((caps2 & MMC_CAP2_HS400_ES) &&
252 card->ext_csd.strobe_support &&
253 (avail_type & EXT_CSD_CARD_TYPE_HS400))
254 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
255
256 card->ext_csd.hs_max_dtr = hs_max_dtr;
257 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
258 card->mmc_avail_type = avail_type;
259}
260
261static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
262{
263 u8 hc_erase_grp_sz, hc_wp_grp_sz;
264
265 /*
266 * Disable these attributes by default
267 */
268 card->ext_csd.enhanced_area_offset = -EINVAL;
269 card->ext_csd.enhanced_area_size = -EINVAL;
270
271 /*
272 * Enhanced area feature support -- check whether the eMMC
273 * card has the Enhanced area enabled. If so, export enhanced
274 * area offset and size to user by adding sysfs interface.
275 */
276 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
277 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
278 if (card->ext_csd.partition_setting_completed) {
279 hc_erase_grp_sz =
280 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
281 hc_wp_grp_sz =
282 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
283
284 /*
285 * calculate the enhanced data area offset, in bytes
286 */
287 card->ext_csd.enhanced_area_offset =
288 (((unsigned long long)ext_csd[139]) << 24) +
289 (((unsigned long long)ext_csd[138]) << 16) +
290 (((unsigned long long)ext_csd[137]) << 8) +
291 (((unsigned long long)ext_csd[136]));
292 if (mmc_card_blockaddr(card))
293 card->ext_csd.enhanced_area_offset <<= 9;
294 /*
295 * calculate the enhanced data area size, in kilobytes
296 */
297 card->ext_csd.enhanced_area_size =
298 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
299 ext_csd[140];
300 card->ext_csd.enhanced_area_size *=
301 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
302 card->ext_csd.enhanced_area_size <<= 9;
303 } else {
304 pr_warn("%s: defines enhanced area without partition setting complete\n",
305 mmc_hostname(card->host));
306 }
307 }
308}
309
310static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
311{
312 int idx;
313 u8 hc_erase_grp_sz, hc_wp_grp_sz;
314 unsigned int part_size;
315
316 /*
317 * General purpose partition feature support --
318 * If ext_csd has the size of general purpose partitions,
319 * set size, part_cfg, partition name in mmc_part.
320 */
321 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
322 EXT_CSD_PART_SUPPORT_PART_EN) {
323 hc_erase_grp_sz =
324 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
325 hc_wp_grp_sz =
326 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
327
328 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
329 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
330 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
331 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
332 continue;
333 if (card->ext_csd.partition_setting_completed == 0) {
334 pr_warn("%s: has partition size defined without partition complete\n",
335 mmc_hostname(card->host));
336 break;
337 }
338 part_size =
339 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
340 << 16) +
341 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
342 << 8) +
343 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
344 part_size *= (size_t)(hc_erase_grp_sz *
345 hc_wp_grp_sz);
346 mmc_part_add(card, part_size << 19,
347 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
348 "gp%d", idx, false,
349 MMC_BLK_DATA_AREA_GP);
350 }
351 }
352}
353
354/* Minimum partition switch timeout in milliseconds */
355#define MMC_MIN_PART_SWITCH_TIME 300
356
357/*
358 * Decode extended CSD.
359 */
360static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
361{
362 int err = 0, idx;
363 unsigned int part_size;
364 struct device_node *np;
365 bool broken_hpi = false;
366
367 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
368 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
369 if (card->csd.structure == 3) {
370 if (card->ext_csd.raw_ext_csd_structure > 2) {
371 pr_err("%s: unrecognised EXT_CSD structure "
372 "version %d\n", mmc_hostname(card->host),
373 card->ext_csd.raw_ext_csd_structure);
374 err = -EINVAL;
375 goto out;
376 }
377 }
378
379 np = mmc_of_find_child_device(card->host, 0);
380 if (np && of_device_is_compatible(np, "mmc-card"))
381 broken_hpi = of_property_read_bool(np, "broken-hpi");
382 of_node_put(np);
383
384 /*
385 * The EXT_CSD format is meant to be forward compatible. As long
386 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
387 * are authorized, see JEDEC JESD84-B50 section B.8.
388 */
389 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
390
391 /* fixup device after ext_csd revision field is updated */
392 mmc_fixup_device(card, mmc_ext_csd_fixups);
393
394 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
395 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
396 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
397 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
398 if (card->ext_csd.rev >= 2) {
399 card->ext_csd.sectors =
400 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
401 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
402 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
403 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
404
405 /* Cards with density > 2GiB are sector addressed */
406 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
407 mmc_card_set_blockaddr(card);
408 }
409
410 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
411 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
412 mmc_select_card_type(card);
413
414 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
415 card->ext_csd.raw_erase_timeout_mult =
416 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
417 card->ext_csd.raw_hc_erase_grp_size =
418 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
419 if (card->ext_csd.rev >= 3) {
420 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
421 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
422
423 /* EXT_CSD value is in units of 10ms, but we store in ms */
424 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
425 /* Some eMMC set the value too low so set a minimum */
426 if (card->ext_csd.part_time &&
427 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
428 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
429
430 /* Sleep / awake timeout in 100ns units */
431 if (sa_shift > 0 && sa_shift <= 0x17)
432 card->ext_csd.sa_timeout =
433 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
434 card->ext_csd.erase_group_def =
435 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
436 card->ext_csd.hc_erase_timeout = 300 *
437 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
438 card->ext_csd.hc_erase_size =
439 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
440
441 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
442
443 /*
444 * There are two boot regions of equal size, defined in
445 * multiples of 128K.
446 */
447 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
448 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
449 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
450 mmc_part_add(card, part_size,
451 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
452 "boot%d", idx, true,
453 MMC_BLK_DATA_AREA_BOOT);
454 }
455 }
456 }
457
458 card->ext_csd.raw_hc_erase_gap_size =
459 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
460 card->ext_csd.raw_sec_trim_mult =
461 ext_csd[EXT_CSD_SEC_TRIM_MULT];
462 card->ext_csd.raw_sec_erase_mult =
463 ext_csd[EXT_CSD_SEC_ERASE_MULT];
464 card->ext_csd.raw_sec_feature_support =
465 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
466 card->ext_csd.raw_trim_mult =
467 ext_csd[EXT_CSD_TRIM_MULT];
468 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
469 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
470 if (card->ext_csd.rev >= 4) {
471 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
472 EXT_CSD_PART_SETTING_COMPLETED)
473 card->ext_csd.partition_setting_completed = 1;
474 else
475 card->ext_csd.partition_setting_completed = 0;
476
477 mmc_manage_enhanced_area(card, ext_csd);
478
479 mmc_manage_gp_partitions(card, ext_csd);
480
481 card->ext_csd.sec_trim_mult =
482 ext_csd[EXT_CSD_SEC_TRIM_MULT];
483 card->ext_csd.sec_erase_mult =
484 ext_csd[EXT_CSD_SEC_ERASE_MULT];
485 card->ext_csd.sec_feature_support =
486 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
487 card->ext_csd.trim_timeout = 300 *
488 ext_csd[EXT_CSD_TRIM_MULT];
489
490 /*
491 * Note that the call to mmc_part_add above defaults to read
492 * only. If this default assumption is changed, the call must
493 * take into account the value of boot_locked below.
494 */
495 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
496 card->ext_csd.boot_ro_lockable = true;
497
498 /* Save power class values */
499 card->ext_csd.raw_pwr_cl_52_195 =
500 ext_csd[EXT_CSD_PWR_CL_52_195];
501 card->ext_csd.raw_pwr_cl_26_195 =
502 ext_csd[EXT_CSD_PWR_CL_26_195];
503 card->ext_csd.raw_pwr_cl_52_360 =
504 ext_csd[EXT_CSD_PWR_CL_52_360];
505 card->ext_csd.raw_pwr_cl_26_360 =
506 ext_csd[EXT_CSD_PWR_CL_26_360];
507 card->ext_csd.raw_pwr_cl_200_195 =
508 ext_csd[EXT_CSD_PWR_CL_200_195];
509 card->ext_csd.raw_pwr_cl_200_360 =
510 ext_csd[EXT_CSD_PWR_CL_200_360];
511 card->ext_csd.raw_pwr_cl_ddr_52_195 =
512 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
513 card->ext_csd.raw_pwr_cl_ddr_52_360 =
514 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
515 card->ext_csd.raw_pwr_cl_ddr_200_360 =
516 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
517 }
518
519 if (card->ext_csd.rev >= 5) {
520 /* Adjust production date as per JEDEC JESD84-B451 */
521 if (card->cid.year < 2010)
522 card->cid.year += 16;
523
524 /* check whether the eMMC card supports BKOPS */
525 if (!mmc_card_broken_hpi(card) &&
526 ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
527 card->ext_csd.bkops = 1;
528 card->ext_csd.man_bkops_en =
529 (ext_csd[EXT_CSD_BKOPS_EN] &
530 EXT_CSD_MANUAL_BKOPS_MASK);
531 card->ext_csd.raw_bkops_status =
532 ext_csd[EXT_CSD_BKOPS_STATUS];
533 if (!card->ext_csd.man_bkops_en)
534 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
535 mmc_hostname(card->host));
536 }
537
538 /* check whether the eMMC card supports HPI */
539 if (!mmc_card_broken_hpi(card) &&
540 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
541 card->ext_csd.hpi = 1;
542 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
543 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
544 else
545 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
546 /*
547 * Indicate the maximum timeout to close
548 * a command interrupted by HPI
549 */
550 card->ext_csd.out_of_int_time =
551 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
552 }
553
554 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
555 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
556
557 /*
558 * RPMB regions are defined in multiples of 128K.
559 */
560 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
561 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
562 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
563 EXT_CSD_PART_CONFIG_ACC_RPMB,
564 "rpmb", 0, false,
565 MMC_BLK_DATA_AREA_RPMB);
566 }
567 }
568
569 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
570 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
571 card->erased_byte = 0xFF;
572 else
573 card->erased_byte = 0x0;
574
575 /* eMMC v4.5 or later */
576 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
577 if (card->ext_csd.rev >= 6) {
578 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
579
580 card->ext_csd.generic_cmd6_time = 10 *
581 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
582 card->ext_csd.power_off_longtime = 10 *
583 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
584
585 card->ext_csd.cache_size =
586 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
587 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
588 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
589 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
590
591 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
592 card->ext_csd.data_sector_size = 4096;
593 else
594 card->ext_csd.data_sector_size = 512;
595
596 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
597 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
598 card->ext_csd.data_tag_unit_size =
599 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
600 (card->ext_csd.data_sector_size);
601 } else {
602 card->ext_csd.data_tag_unit_size = 0;
603 }
604
605 card->ext_csd.max_packed_writes =
606 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
607 card->ext_csd.max_packed_reads =
608 ext_csd[EXT_CSD_MAX_PACKED_READS];
609 } else {
610 card->ext_csd.data_sector_size = 512;
611 }
612
613 /* eMMC v5 or later */
614 if (card->ext_csd.rev >= 7) {
615 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
616 MMC_FIRMWARE_LEN);
617 card->ext_csd.ffu_capable =
618 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
619 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
620 }
621
622 /* eMMC v5.1 or later */
623 if (card->ext_csd.rev >= 8) {
624 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
625 EXT_CSD_CMDQ_SUPPORTED;
626 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
627 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
628 /* Exclude inefficiently small queue depths */
629 if (card->ext_csd.cmdq_depth <= 2) {
630 card->ext_csd.cmdq_support = false;
631 card->ext_csd.cmdq_depth = 0;
632 }
633 if (card->ext_csd.cmdq_support) {
634 pr_debug("%s: Command Queue supported depth %u\n",
635 mmc_hostname(card->host),
636 card->ext_csd.cmdq_depth);
637 }
638 }
639out:
640 return err;
641}
642
643static int mmc_read_ext_csd(struct mmc_card *card)
644{
645 u8 *ext_csd;
646 int err;
647
648 if (!mmc_can_ext_csd(card))
649 return 0;
650
651 err = mmc_get_ext_csd(card, &ext_csd);
652 if (err) {
653 /* If the host or the card can't do the switch,
654 * fail more gracefully. */
655 if ((err != -EINVAL)
656 && (err != -ENOSYS)
657 && (err != -EFAULT))
658 return err;
659
660 /*
661 * High capacity cards should have this "magic" size
662 * stored in their CSD.
663 */
664 if (card->csd.capacity == (4096 * 512)) {
665 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
666 mmc_hostname(card->host));
667 } else {
668 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
669 mmc_hostname(card->host));
670 err = 0;
671 }
672
673 return err;
674 }
675
676 err = mmc_decode_ext_csd(card, ext_csd);
677 kfree(ext_csd);
678 return err;
679}
680
681static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
682{
683 u8 *bw_ext_csd;
684 int err;
685
686 if (bus_width == MMC_BUS_WIDTH_1)
687 return 0;
688
689 err = mmc_get_ext_csd(card, &bw_ext_csd);
690 if (err)
691 return err;
692
693 /* only compare read only fields */
694 err = !((card->ext_csd.raw_partition_support ==
695 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
696 (card->ext_csd.raw_erased_mem_count ==
697 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
698 (card->ext_csd.rev ==
699 bw_ext_csd[EXT_CSD_REV]) &&
700 (card->ext_csd.raw_ext_csd_structure ==
701 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
702 (card->ext_csd.raw_card_type ==
703 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
704 (card->ext_csd.raw_s_a_timeout ==
705 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
706 (card->ext_csd.raw_hc_erase_gap_size ==
707 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
708 (card->ext_csd.raw_erase_timeout_mult ==
709 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
710 (card->ext_csd.raw_hc_erase_grp_size ==
711 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
712 (card->ext_csd.raw_sec_trim_mult ==
713 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
714 (card->ext_csd.raw_sec_erase_mult ==
715 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
716 (card->ext_csd.raw_sec_feature_support ==
717 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
718 (card->ext_csd.raw_trim_mult ==
719 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
720 (card->ext_csd.raw_sectors[0] ==
721 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
722 (card->ext_csd.raw_sectors[1] ==
723 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
724 (card->ext_csd.raw_sectors[2] ==
725 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
726 (card->ext_csd.raw_sectors[3] ==
727 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
728 (card->ext_csd.raw_pwr_cl_52_195 ==
729 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
730 (card->ext_csd.raw_pwr_cl_26_195 ==
731 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
732 (card->ext_csd.raw_pwr_cl_52_360 ==
733 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
734 (card->ext_csd.raw_pwr_cl_26_360 ==
735 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
736 (card->ext_csd.raw_pwr_cl_200_195 ==
737 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
738 (card->ext_csd.raw_pwr_cl_200_360 ==
739 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
740 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
741 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
742 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
743 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
744 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
745 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
746
747 if (err)
748 err = -EINVAL;
749
750 kfree(bw_ext_csd);
751 return err;
752}
753
754MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
755 card->raw_cid[2], card->raw_cid[3]);
756MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
757 card->raw_csd[2], card->raw_csd[3]);
758MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
759MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
760MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
761MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
762MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
763MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
764MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
765MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
766MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
767MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
768MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
769 card->ext_csd.enhanced_area_offset);
770MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
771MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
772MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
773MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
774
775static ssize_t mmc_fwrev_show(struct device *dev,
776 struct device_attribute *attr,
777 char *buf)
778{
779 struct mmc_card *card = mmc_dev_to_card(dev);
780
781 if (card->ext_csd.rev < 7) {
782 return sprintf(buf, "0x%x\n", card->cid.fwrev);
783 } else {
784 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
785 card->ext_csd.fwrev);
786 }
787}
788
789static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
790
791static ssize_t mmc_dsr_show(struct device *dev,
792 struct device_attribute *attr,
793 char *buf)
794{
795 struct mmc_card *card = mmc_dev_to_card(dev);
796 struct mmc_host *host = card->host;
797
798 if (card->csd.dsr_imp && host->dsr_req)
799 return sprintf(buf, "0x%x\n", host->dsr);
800 else
801 /* return default DSR value */
802 return sprintf(buf, "0x%x\n", 0x404);
803}
804
805static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
806
807static struct attribute *mmc_std_attrs[] = {
808 &dev_attr_cid.attr,
809 &dev_attr_csd.attr,
810 &dev_attr_date.attr,
811 &dev_attr_erase_size.attr,
812 &dev_attr_preferred_erase_size.attr,
813 &dev_attr_fwrev.attr,
814 &dev_attr_ffu_capable.attr,
815 &dev_attr_hwrev.attr,
816 &dev_attr_manfid.attr,
817 &dev_attr_name.attr,
818 &dev_attr_oemid.attr,
819 &dev_attr_prv.attr,
820 &dev_attr_serial.attr,
821 &dev_attr_enhanced_area_offset.attr,
822 &dev_attr_enhanced_area_size.attr,
823 &dev_attr_raw_rpmb_size_mult.attr,
824 &dev_attr_rel_sectors.attr,
825 &dev_attr_ocr.attr,
826 &dev_attr_dsr.attr,
827 NULL,
828};
829ATTRIBUTE_GROUPS(mmc_std);
830
831static struct device_type mmc_type = {
832 .groups = mmc_std_groups,
833};
834
835/*
836 * Select the PowerClass for the current bus width
837 * If power class is defined for 4/8 bit bus in the
838 * extended CSD register, select it by executing the
839 * mmc_switch command.
840 */
841static int __mmc_select_powerclass(struct mmc_card *card,
842 unsigned int bus_width)
843{
844 struct mmc_host *host = card->host;
845 struct mmc_ext_csd *ext_csd = &card->ext_csd;
846 unsigned int pwrclass_val = 0;
847 int err = 0;
848
849 switch (1 << host->ios.vdd) {
850 case MMC_VDD_165_195:
851 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
852 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
853 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
854 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
855 ext_csd->raw_pwr_cl_52_195 :
856 ext_csd->raw_pwr_cl_ddr_52_195;
857 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
858 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
859 break;
860 case MMC_VDD_27_28:
861 case MMC_VDD_28_29:
862 case MMC_VDD_29_30:
863 case MMC_VDD_30_31:
864 case MMC_VDD_31_32:
865 case MMC_VDD_32_33:
866 case MMC_VDD_33_34:
867 case MMC_VDD_34_35:
868 case MMC_VDD_35_36:
869 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
870 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
871 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
872 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
873 ext_csd->raw_pwr_cl_52_360 :
874 ext_csd->raw_pwr_cl_ddr_52_360;
875 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
876 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
877 ext_csd->raw_pwr_cl_ddr_200_360 :
878 ext_csd->raw_pwr_cl_200_360;
879 break;
880 default:
881 pr_warn("%s: Voltage range not supported for power class\n",
882 mmc_hostname(host));
883 return -EINVAL;
884 }
885
886 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
887 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
888 EXT_CSD_PWR_CL_8BIT_SHIFT;
889 else
890 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
891 EXT_CSD_PWR_CL_4BIT_SHIFT;
892
893 /* If the power class is different from the default value */
894 if (pwrclass_val > 0) {
895 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
896 EXT_CSD_POWER_CLASS,
897 pwrclass_val,
898 card->ext_csd.generic_cmd6_time);
899 }
900
901 return err;
902}
903
904static int mmc_select_powerclass(struct mmc_card *card)
905{
906 struct mmc_host *host = card->host;
907 u32 bus_width, ext_csd_bits;
908 int err, ddr;
909
910 /* Power class selection is supported for versions >= 4.0 */
911 if (!mmc_can_ext_csd(card))
912 return 0;
913
914 bus_width = host->ios.bus_width;
915 /* Power class values are defined only for 4/8 bit bus */
916 if (bus_width == MMC_BUS_WIDTH_1)
917 return 0;
918
919 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
920 if (ddr)
921 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
922 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
923 else
924 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
925 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
926
927 err = __mmc_select_powerclass(card, ext_csd_bits);
928 if (err)
929 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
930 mmc_hostname(host), 1 << bus_width, ddr);
931
932 return err;
933}
934
935/*
936 * Set the bus speed for the selected speed mode.
937 */
938static void mmc_set_bus_speed(struct mmc_card *card)
939{
940 unsigned int max_dtr = (unsigned int)-1;
941
942 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
943 max_dtr > card->ext_csd.hs200_max_dtr)
944 max_dtr = card->ext_csd.hs200_max_dtr;
945 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
946 max_dtr = card->ext_csd.hs_max_dtr;
947 else if (max_dtr > card->csd.max_dtr)
948 max_dtr = card->csd.max_dtr;
949
950 mmc_set_clock(card->host, max_dtr);
951}
952
953/*
954 * Select the bus width amoung 4-bit and 8-bit(SDR).
955 * If the bus width is changed successfully, return the selected width value.
956 * Zero is returned instead of error value if the wide width is not supported.
957 */
958static int mmc_select_bus_width(struct mmc_card *card)
959{
960 static unsigned ext_csd_bits[] = {
961 EXT_CSD_BUS_WIDTH_8,
962 EXT_CSD_BUS_WIDTH_4,
963 };
964 static unsigned bus_widths[] = {
965 MMC_BUS_WIDTH_8,
966 MMC_BUS_WIDTH_4,
967 };
968 struct mmc_host *host = card->host;
969 unsigned idx, bus_width = 0;
970 int err = 0;
971
972 if (!mmc_can_ext_csd(card) ||
973 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
974 return 0;
975
976 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
977
978 /*
979 * Unlike SD, MMC cards dont have a configuration register to notify
980 * supported bus width. So bus test command should be run to identify
981 * the supported bus width or compare the ext csd values of current
982 * bus width and ext csd values of 1 bit mode read earlier.
983 */
984 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
985 /*
986 * Host is capable of 8bit transfer, then switch
987 * the device to work in 8bit transfer mode. If the
988 * mmc switch command returns error then switch to
989 * 4bit transfer mode. On success set the corresponding
990 * bus width on the host.
991 */
992 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
993 EXT_CSD_BUS_WIDTH,
994 ext_csd_bits[idx],
995 card->ext_csd.generic_cmd6_time);
996 if (err)
997 continue;
998
999 bus_width = bus_widths[idx];
1000 mmc_set_bus_width(host, bus_width);
1001
1002 /*
1003 * If controller can't handle bus width test,
1004 * compare ext_csd previously read in 1 bit mode
1005 * against ext_csd at new bus width
1006 */
1007 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1008 err = mmc_compare_ext_csds(card, bus_width);
1009 else
1010 err = mmc_bus_test(card, bus_width);
1011
1012 if (!err) {
1013 err = bus_width;
1014 break;
1015 } else {
1016 pr_warn("%s: switch to bus width %d failed\n",
1017 mmc_hostname(host), 1 << bus_width);
1018 }
1019 }
1020
1021 return err;
1022}
1023
1024/*
1025 * Switch to the high-speed mode
1026 */
1027static int mmc_select_hs(struct mmc_card *card)
1028{
1029 int err;
1030
1031 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1032 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1033 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1034 true, true, true);
1035 if (err)
1036 pr_warn("%s: switch to high-speed failed, err:%d\n",
1037 mmc_hostname(card->host), err);
1038
1039 return err;
1040}
1041
1042/*
1043 * Activate wide bus and DDR if supported.
1044 */
1045static int mmc_select_hs_ddr(struct mmc_card *card)
1046{
1047 struct mmc_host *host = card->host;
1048 u32 bus_width, ext_csd_bits;
1049 int err = 0;
1050
1051 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1052 return 0;
1053
1054 bus_width = host->ios.bus_width;
1055 if (bus_width == MMC_BUS_WIDTH_1)
1056 return 0;
1057
1058 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1059 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1060
1061 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1062 EXT_CSD_BUS_WIDTH,
1063 ext_csd_bits,
1064 card->ext_csd.generic_cmd6_time,
1065 MMC_TIMING_MMC_DDR52,
1066 true, true, true);
1067 if (err) {
1068 pr_err("%s: switch to bus width %d ddr failed\n",
1069 mmc_hostname(host), 1 << bus_width);
1070 return err;
1071 }
1072
1073 /*
1074 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1075 * signaling.
1076 *
1077 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1078 *
1079 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1080 * in the JEDEC spec for DDR.
1081 *
1082 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1083 * host controller can support this, like some of the SDHCI
1084 * controller which connect to an eMMC device. Some of these
1085 * host controller still needs to use 1.8v vccq for supporting
1086 * DDR mode.
1087 *
1088 * So the sequence will be:
1089 * if (host and device can both support 1.2v IO)
1090 * use 1.2v IO;
1091 * else if (host and device can both support 1.8v IO)
1092 * use 1.8v IO;
1093 * so if host and device can only support 3.3v IO, this is the
1094 * last choice.
1095 *
1096 * WARNING: eMMC rules are NOT the same as SD DDR
1097 */
1098 err = -EINVAL;
1099 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1100 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1101
1102 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1103 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1104
1105 /* make sure vccq is 3.3v after switching disaster */
1106 if (err)
1107 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1108
1109 return err;
1110}
1111
1112static int mmc_select_hs400(struct mmc_card *card)
1113{
1114 struct mmc_host *host = card->host;
1115 unsigned int max_dtr;
1116 int err = 0;
1117 u8 val;
1118
1119 /*
1120 * HS400 mode requires 8-bit bus width
1121 */
1122 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1123 host->ios.bus_width == MMC_BUS_WIDTH_8))
1124 return 0;
1125
1126 /* Switch card to HS mode */
1127 val = EXT_CSD_TIMING_HS;
1128 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1129 EXT_CSD_HS_TIMING, val,
1130 card->ext_csd.generic_cmd6_time, 0,
1131 true, false, true);
1132 if (err) {
1133 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1134 mmc_hostname(host), err);
1135 return err;
1136 }
1137
1138 /* Set host controller to HS timing */
1139 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1140
1141 /* Reduce frequency to HS frequency */
1142 max_dtr = card->ext_csd.hs_max_dtr;
1143 mmc_set_clock(host, max_dtr);
1144
1145 err = mmc_switch_status(card);
1146 if (err)
1147 goto out_err;
1148
1149 /* Switch card to DDR */
1150 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1151 EXT_CSD_BUS_WIDTH,
1152 EXT_CSD_DDR_BUS_WIDTH_8,
1153 card->ext_csd.generic_cmd6_time);
1154 if (err) {
1155 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1156 mmc_hostname(host), err);
1157 return err;
1158 }
1159
1160 /* Switch card to HS400 */
1161 val = EXT_CSD_TIMING_HS400 |
1162 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1163 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1164 EXT_CSD_HS_TIMING, val,
1165 card->ext_csd.generic_cmd6_time, 0,
1166 true, false, true);
1167 if (err) {
1168 pr_err("%s: switch to hs400 failed, err:%d\n",
1169 mmc_hostname(host), err);
1170 return err;
1171 }
1172
1173 /* Set host controller to HS400 timing and frequency */
1174 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1175 mmc_set_bus_speed(card);
1176
1177 err = mmc_switch_status(card);
1178 if (err)
1179 goto out_err;
1180
1181 return 0;
1182
1183out_err:
1184 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1185 __func__, err);
1186 return err;
1187}
1188
1189int mmc_hs200_to_hs400(struct mmc_card *card)
1190{
1191 return mmc_select_hs400(card);
1192}
1193
1194int mmc_hs400_to_hs200(struct mmc_card *card)
1195{
1196 struct mmc_host *host = card->host;
1197 unsigned int max_dtr;
1198 int err;
1199 u8 val;
1200
1201 /* Reduce frequency to HS */
1202 max_dtr = card->ext_csd.hs_max_dtr;
1203 mmc_set_clock(host, max_dtr);
1204
1205 /* Switch HS400 to HS DDR */
1206 val = EXT_CSD_TIMING_HS;
1207 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1208 val, card->ext_csd.generic_cmd6_time, 0,
1209 true, false, true);
1210 if (err)
1211 goto out_err;
1212
1213 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1214
1215 err = mmc_switch_status(card);
1216 if (err)
1217 goto out_err;
1218
1219 /* Switch HS DDR to HS */
1220 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1221 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1222 0, true, false, true);
1223 if (err)
1224 goto out_err;
1225
1226 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1227
1228 err = mmc_switch_status(card);
1229 if (err)
1230 goto out_err;
1231
1232 /* Switch HS to HS200 */
1233 val = EXT_CSD_TIMING_HS200 |
1234 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1235 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1236 val, card->ext_csd.generic_cmd6_time, 0,
1237 true, false, true);
1238 if (err)
1239 goto out_err;
1240
1241 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1242
1243 /*
1244 * For HS200, CRC errors are not a reliable way to know the switch
1245 * failed. If there really is a problem, we would expect tuning will
1246 * fail and the result ends up the same.
1247 */
1248 err = __mmc_switch_status(card, false);
1249 if (err)
1250 goto out_err;
1251
1252 mmc_set_bus_speed(card);
1253
1254 return 0;
1255
1256out_err:
1257 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1258 __func__, err);
1259 return err;
1260}
1261
1262static int mmc_select_hs400es(struct mmc_card *card)
1263{
1264 struct mmc_host *host = card->host;
1265 int err = 0;
1266 u8 val;
1267
1268 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1269 err = -ENOTSUPP;
1270 goto out_err;
1271 }
1272
1273 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1274 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1275
1276 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1277 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1278
1279 /* If fails try again during next card power cycle */
1280 if (err)
1281 goto out_err;
1282
1283 err = mmc_select_bus_width(card);
1284 if (err < 0)
1285 goto out_err;
1286
1287 /* Switch card to HS mode */
1288 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1289 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1290 card->ext_csd.generic_cmd6_time, 0,
1291 true, false, true);
1292 if (err) {
1293 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1294 mmc_hostname(host), err);
1295 goto out_err;
1296 }
1297
1298 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1299 err = mmc_switch_status(card);
1300 if (err)
1301 goto out_err;
1302
1303 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1304
1305 /* Switch card to DDR with strobe bit */
1306 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1307 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1308 EXT_CSD_BUS_WIDTH,
1309 val,
1310 card->ext_csd.generic_cmd6_time);
1311 if (err) {
1312 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1313 mmc_hostname(host), err);
1314 goto out_err;
1315 }
1316
1317 /* Switch card to HS400 */
1318 val = EXT_CSD_TIMING_HS400 |
1319 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1320 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1321 EXT_CSD_HS_TIMING, val,
1322 card->ext_csd.generic_cmd6_time, 0,
1323 true, false, true);
1324 if (err) {
1325 pr_err("%s: switch to hs400es failed, err:%d\n",
1326 mmc_hostname(host), err);
1327 goto out_err;
1328 }
1329
1330 /* Set host controller to HS400 timing and frequency */
1331 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1332
1333 /* Controller enable enhanced strobe function */
1334 host->ios.enhanced_strobe = true;
1335 if (host->ops->hs400_enhanced_strobe)
1336 host->ops->hs400_enhanced_strobe(host, &host->ios);
1337
1338 err = mmc_switch_status(card);
1339 if (err)
1340 goto out_err;
1341
1342 return 0;
1343
1344out_err:
1345 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1346 __func__, err);
1347 return err;
1348}
1349
1350static void mmc_select_driver_type(struct mmc_card *card)
1351{
1352 int card_drv_type, drive_strength, drv_type;
1353
1354 card_drv_type = card->ext_csd.raw_driver_strength |
1355 mmc_driver_type_mask(0);
1356
1357 drive_strength = mmc_select_drive_strength(card,
1358 card->ext_csd.hs200_max_dtr,
1359 card_drv_type, &drv_type);
1360
1361 card->drive_strength = drive_strength;
1362
1363 if (drv_type)
1364 mmc_set_driver_type(card->host, drv_type);
1365}
1366
1367/*
1368 * For device supporting HS200 mode, the following sequence
1369 * should be done before executing the tuning process.
1370 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1371 * 2. switch to HS200 mode
1372 * 3. set the clock to > 52Mhz and <=200MHz
1373 */
1374static int mmc_select_hs200(struct mmc_card *card)
1375{
1376 struct mmc_host *host = card->host;
1377 unsigned int old_timing, old_signal_voltage;
1378 int err = -EINVAL;
1379 u8 val;
1380
1381 old_signal_voltage = host->ios.signal_voltage;
1382 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1383 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1384
1385 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1386 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1387
1388 /* If fails try again during next card power cycle */
1389 if (err)
1390 return err;
1391
1392 mmc_select_driver_type(card);
1393
1394 /*
1395 * Set the bus width(4 or 8) with host's support and
1396 * switch to HS200 mode if bus width is set successfully.
1397 */
1398 err = mmc_select_bus_width(card);
1399 if (err > 0) {
1400 val = EXT_CSD_TIMING_HS200 |
1401 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1402 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1403 EXT_CSD_HS_TIMING, val,
1404 card->ext_csd.generic_cmd6_time, 0,
1405 true, false, true);
1406 if (err)
1407 goto err;
1408 old_timing = host->ios.timing;
1409 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1410
1411 /*
1412 * For HS200, CRC errors are not a reliable way to know the
1413 * switch failed. If there really is a problem, we would expect
1414 * tuning will fail and the result ends up the same.
1415 */
1416 err = __mmc_switch_status(card, false);
1417
1418 /*
1419 * mmc_select_timing() assumes timing has not changed if
1420 * it is a switch error.
1421 */
1422 if (err == -EBADMSG)
1423 mmc_set_timing(host, old_timing);
1424 }
1425err:
1426 if (err) {
1427 /* fall back to the old signal voltage, if fails report error */
1428 if (__mmc_set_signal_voltage(host, old_signal_voltage))
1429 err = -EIO;
1430
1431 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1432 __func__, err);
1433 }
1434 return err;
1435}
1436
1437/*
1438 * Activate High Speed, HS200 or HS400ES mode if supported.
1439 */
1440static int mmc_select_timing(struct mmc_card *card)
1441{
1442 int err = 0;
1443
1444 if (!mmc_can_ext_csd(card))
1445 goto bus_speed;
1446
1447 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1448 err = mmc_select_hs400es(card);
1449 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1450 err = mmc_select_hs200(card);
1451 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1452 err = mmc_select_hs(card);
1453
1454 if (err && err != -EBADMSG)
1455 return err;
1456
1457bus_speed:
1458 /*
1459 * Set the bus speed to the selected bus timing.
1460 * If timing is not selected, backward compatible is the default.
1461 */
1462 mmc_set_bus_speed(card);
1463 return 0;
1464}
1465
1466/*
1467 * Execute tuning sequence to seek the proper bus operating
1468 * conditions for HS200 and HS400, which sends CMD21 to the device.
1469 */
1470static int mmc_hs200_tuning(struct mmc_card *card)
1471{
1472 struct mmc_host *host = card->host;
1473
1474 /*
1475 * Timing should be adjusted to the HS400 target
1476 * operation frequency for tuning process
1477 */
1478 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1479 host->ios.bus_width == MMC_BUS_WIDTH_8)
1480 if (host->ops->prepare_hs400_tuning)
1481 host->ops->prepare_hs400_tuning(host, &host->ios);
1482
1483 return mmc_execute_tuning(card);
1484}
1485
1486/*
1487 * Handle the detection and initialisation of a card.
1488 *
1489 * In the case of a resume, "oldcard" will contain the card
1490 * we're trying to reinitialise.
1491 */
1492static int mmc_init_card(struct mmc_host *host, u32 ocr,
1493 struct mmc_card *oldcard)
1494{
1495 struct mmc_card *card;
1496 int err;
1497 u32 cid[4];
1498 u32 rocr;
1499
1500 WARN_ON(!host->claimed);
1501
1502 /* Set correct bus mode for MMC before attempting init */
1503 if (!mmc_host_is_spi(host))
1504 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1505
1506 /*
1507 * Since we're changing the OCR value, we seem to
1508 * need to tell some cards to go back to the idle
1509 * state. We wait 1ms to give cards time to
1510 * respond.
1511 * mmc_go_idle is needed for eMMC that are asleep
1512 */
1513 mmc_go_idle(host);
1514
1515 /* The extra bit indicates that we support high capacity */
1516 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1517 if (err)
1518 goto err;
1519
1520 /*
1521 * For SPI, enable CRC as appropriate.
1522 */
1523 if (mmc_host_is_spi(host)) {
1524 err = mmc_spi_set_crc(host, use_spi_crc);
1525 if (err)
1526 goto err;
1527 }
1528
1529 /*
1530 * Fetch CID from card.
1531 */
1532 if (mmc_host_is_spi(host))
1533 err = mmc_send_cid(host, cid);
1534 else
1535 err = mmc_all_send_cid(host, cid);
1536 if (err)
1537 goto err;
1538
1539 if (oldcard) {
1540 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1541 err = -ENOENT;
1542 goto err;
1543 }
1544
1545 card = oldcard;
1546 } else {
1547 /*
1548 * Allocate card structure.
1549 */
1550 card = mmc_alloc_card(host, &mmc_type);
1551 if (IS_ERR(card)) {
1552 err = PTR_ERR(card);
1553 goto err;
1554 }
1555
1556 card->ocr = ocr;
1557 card->type = MMC_TYPE_MMC;
1558 card->rca = 1;
1559 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1560 }
1561
1562 /*
1563 * Call the optional HC's init_card function to handle quirks.
1564 */
1565 if (host->ops->init_card)
1566 host->ops->init_card(host, card);
1567
1568 /*
1569 * For native busses: set card RCA and quit open drain mode.
1570 */
1571 if (!mmc_host_is_spi(host)) {
1572 err = mmc_set_relative_addr(card);
1573 if (err)
1574 goto free_card;
1575
1576 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1577 }
1578
1579 if (!oldcard) {
1580 /*
1581 * Fetch CSD from card.
1582 */
1583 err = mmc_send_csd(card, card->raw_csd);
1584 if (err)
1585 goto free_card;
1586
1587 err = mmc_decode_csd(card);
1588 if (err)
1589 goto free_card;
1590 err = mmc_decode_cid(card);
1591 if (err)
1592 goto free_card;
1593 }
1594
1595 /*
1596 * handling only for cards supporting DSR and hosts requesting
1597 * DSR configuration
1598 */
1599 if (card->csd.dsr_imp && host->dsr_req)
1600 mmc_set_dsr(host);
1601
1602 /*
1603 * Select card, as all following commands rely on that.
1604 */
1605 if (!mmc_host_is_spi(host)) {
1606 err = mmc_select_card(card);
1607 if (err)
1608 goto free_card;
1609 }
1610
1611 if (!oldcard) {
1612 /* Read extended CSD. */
1613 err = mmc_read_ext_csd(card);
1614 if (err)
1615 goto free_card;
1616
1617 /*
1618 * If doing byte addressing, check if required to do sector
1619 * addressing. Handle the case of <2GB cards needing sector
1620 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1621 * ocr register has bit 30 set for sector addressing.
1622 */
1623 if (rocr & BIT(30))
1624 mmc_card_set_blockaddr(card);
1625
1626 /* Erase size depends on CSD and Extended CSD */
1627 mmc_set_erase_size(card);
1628 }
1629
1630 /*
1631 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1632 * bit. This bit will be lost every time after a reset or power off.
1633 */
1634 if (card->ext_csd.partition_setting_completed ||
1635 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1636 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1637 EXT_CSD_ERASE_GROUP_DEF, 1,
1638 card->ext_csd.generic_cmd6_time);
1639
1640 if (err && err != -EBADMSG)
1641 goto free_card;
1642
1643 if (err) {
1644 err = 0;
1645 /*
1646 * Just disable enhanced area off & sz
1647 * will try to enable ERASE_GROUP_DEF
1648 * during next time reinit
1649 */
1650 card->ext_csd.enhanced_area_offset = -EINVAL;
1651 card->ext_csd.enhanced_area_size = -EINVAL;
1652 } else {
1653 card->ext_csd.erase_group_def = 1;
1654 /*
1655 * enable ERASE_GRP_DEF successfully.
1656 * This will affect the erase size, so
1657 * here need to reset erase size
1658 */
1659 mmc_set_erase_size(card);
1660 }
1661 }
1662
1663 /*
1664 * Ensure eMMC user default partition is enabled
1665 */
1666 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1667 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1668 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1669 card->ext_csd.part_config,
1670 card->ext_csd.part_time);
1671 if (err && err != -EBADMSG)
1672 goto free_card;
1673 }
1674
1675 /*
1676 * Enable power_off_notification byte in the ext_csd register
1677 */
1678 if (card->ext_csd.rev >= 6) {
1679 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1680 EXT_CSD_POWER_OFF_NOTIFICATION,
1681 EXT_CSD_POWER_ON,
1682 card->ext_csd.generic_cmd6_time);
1683 if (err && err != -EBADMSG)
1684 goto free_card;
1685
1686 /*
1687 * The err can be -EBADMSG or 0,
1688 * so check for success and update the flag
1689 */
1690 if (!err)
1691 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1692 }
1693
1694 /*
1695 * Select timing interface
1696 */
1697 err = mmc_select_timing(card);
1698 if (err)
1699 goto free_card;
1700
1701 if (mmc_card_hs200(card)) {
1702 err = mmc_hs200_tuning(card);
1703 if (err)
1704 goto free_card;
1705
1706 err = mmc_select_hs400(card);
1707 if (err)
1708 goto free_card;
1709 } else if (!mmc_card_hs400es(card)) {
1710 /* Select the desired bus width optionally */
1711 err = mmc_select_bus_width(card);
1712 if (err > 0 && mmc_card_hs(card)) {
1713 err = mmc_select_hs_ddr(card);
1714 if (err)
1715 goto free_card;
1716 }
1717 }
1718
1719 /*
1720 * Choose the power class with selected bus interface
1721 */
1722 mmc_select_powerclass(card);
1723
1724 /*
1725 * Enable HPI feature (if supported)
1726 */
1727 if (card->ext_csd.hpi) {
1728 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1729 EXT_CSD_HPI_MGMT, 1,
1730 card->ext_csd.generic_cmd6_time);
1731 if (err && err != -EBADMSG)
1732 goto free_card;
1733 if (err) {
1734 pr_warn("%s: Enabling HPI failed\n",
1735 mmc_hostname(card->host));
1736 err = 0;
1737 } else
1738 card->ext_csd.hpi_en = 1;
1739 }
1740
1741 /*
1742 * If cache size is higher than 0, this indicates
1743 * the existence of cache and it can be turned on.
1744 */
1745 if (!mmc_card_broken_hpi(card) &&
1746 card->ext_csd.cache_size > 0) {
1747 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1748 EXT_CSD_CACHE_CTRL, 1,
1749 card->ext_csd.generic_cmd6_time);
1750 if (err && err != -EBADMSG)
1751 goto free_card;
1752
1753 /*
1754 * Only if no error, cache is turned on successfully.
1755 */
1756 if (err) {
1757 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1758 mmc_hostname(card->host), err);
1759 card->ext_csd.cache_ctrl = 0;
1760 err = 0;
1761 } else {
1762 card->ext_csd.cache_ctrl = 1;
1763 }
1764 }
1765
1766 /*
1767 * The mandatory minimum values are defined for packed command.
1768 * read: 5, write: 3
1769 */
1770 if (card->ext_csd.max_packed_writes >= 3 &&
1771 card->ext_csd.max_packed_reads >= 5 &&
1772 host->caps2 & MMC_CAP2_PACKED_CMD) {
1773 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1774 EXT_CSD_EXP_EVENTS_CTRL,
1775 EXT_CSD_PACKED_EVENT_EN,
1776 card->ext_csd.generic_cmd6_time);
1777 if (err && err != -EBADMSG)
1778 goto free_card;
1779 if (err) {
1780 pr_warn("%s: Enabling packed event failed\n",
1781 mmc_hostname(card->host));
1782 card->ext_csd.packed_event_en = 0;
1783 err = 0;
1784 } else {
1785 card->ext_csd.packed_event_en = 1;
1786 }
1787 }
1788
1789 if (!oldcard)
1790 host->card = card;
1791
1792 return 0;
1793
1794free_card:
1795 if (!oldcard)
1796 mmc_remove_card(card);
1797err:
1798 return err;
1799}
1800
1801static int mmc_can_sleep(struct mmc_card *card)
1802{
1803 return (card && card->ext_csd.rev >= 3);
1804}
1805
1806static int mmc_sleep(struct mmc_host *host)
1807{
1808 struct mmc_command cmd = {0};
1809 struct mmc_card *card = host->card;
1810 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1811 int err;
1812
1813 /* Re-tuning can't be done once the card is deselected */
1814 mmc_retune_hold(host);
1815
1816 err = mmc_deselect_cards(host);
1817 if (err)
1818 goto out_release;
1819
1820 cmd.opcode = MMC_SLEEP_AWAKE;
1821 cmd.arg = card->rca << 16;
1822 cmd.arg |= 1 << 15;
1823
1824 /*
1825 * If the max_busy_timeout of the host is specified, validate it against
1826 * the sleep cmd timeout. A failure means we need to prevent the host
1827 * from doing hw busy detection, which is done by converting to a R1
1828 * response instead of a R1B.
1829 */
1830 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1831 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1832 } else {
1833 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1834 cmd.busy_timeout = timeout_ms;
1835 }
1836
1837 err = mmc_wait_for_cmd(host, &cmd, 0);
1838 if (err)
1839 goto out_release;
1840
1841 /*
1842 * If the host does not wait while the card signals busy, then we will
1843 * will have to wait the sleep/awake timeout. Note, we cannot use the
1844 * SEND_STATUS command to poll the status because that command (and most
1845 * others) is invalid while the card sleeps.
1846 */
1847 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1848 mmc_delay(timeout_ms);
1849
1850out_release:
1851 mmc_retune_release(host);
1852 return err;
1853}
1854
1855static int mmc_can_poweroff_notify(const struct mmc_card *card)
1856{
1857 return card &&
1858 mmc_card_mmc(card) &&
1859 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1860}
1861
1862static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1863{
1864 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1865 int err;
1866
1867 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1868 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1869 timeout = card->ext_csd.power_off_longtime;
1870
1871 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1872 EXT_CSD_POWER_OFF_NOTIFICATION,
1873 notify_type, timeout, 0, true, false, false);
1874 if (err)
1875 pr_err("%s: Power Off Notification timed out, %u\n",
1876 mmc_hostname(card->host), timeout);
1877
1878 /* Disable the power off notification after the switch operation. */
1879 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1880
1881 return err;
1882}
1883
1884/*
1885 * Host is being removed. Free up the current card.
1886 */
1887static void mmc_remove(struct mmc_host *host)
1888{
1889 mmc_remove_card(host->card);
1890 host->card = NULL;
1891}
1892
1893/*
1894 * Card detection - card is alive.
1895 */
1896static int mmc_alive(struct mmc_host *host)
1897{
1898 return mmc_send_status(host->card, NULL);
1899}
1900
1901/*
1902 * Card detection callback from host.
1903 */
1904static void mmc_detect(struct mmc_host *host)
1905{
1906 int err;
1907
1908 mmc_get_card(host->card);
1909
1910 /*
1911 * Just check if our card has been removed.
1912 */
1913 err = _mmc_detect_card_removed(host);
1914
1915 mmc_put_card(host->card);
1916
1917 if (err) {
1918 mmc_remove(host);
1919
1920 mmc_claim_host(host);
1921 mmc_detach_bus(host);
1922 mmc_power_off(host);
1923 mmc_release_host(host);
1924 }
1925}
1926
1927static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1928{
1929 int err = 0;
1930 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1931 EXT_CSD_POWER_OFF_LONG;
1932
1933 mmc_claim_host(host);
1934
1935 if (mmc_card_suspended(host->card))
1936 goto out;
1937
1938 if (mmc_card_doing_bkops(host->card)) {
1939 err = mmc_stop_bkops(host->card);
1940 if (err)
1941 goto out;
1942 }
1943
1944 err = mmc_flush_cache(host->card);
1945 if (err)
1946 goto out;
1947
1948 if (mmc_can_poweroff_notify(host->card) &&
1949 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1950 err = mmc_poweroff_notify(host->card, notify_type);
1951 else if (mmc_can_sleep(host->card))
1952 err = mmc_sleep(host);
1953 else if (!mmc_host_is_spi(host))
1954 err = mmc_deselect_cards(host);
1955
1956 if (!err) {
1957 mmc_power_off(host);
1958 mmc_card_set_suspended(host->card);
1959 }
1960out:
1961 mmc_release_host(host);
1962 return err;
1963}
1964
1965/*
1966 * Suspend callback
1967 */
1968static int mmc_suspend(struct mmc_host *host)
1969{
1970 int err;
1971
1972 err = _mmc_suspend(host, true);
1973 if (!err) {
1974 pm_runtime_disable(&host->card->dev);
1975 pm_runtime_set_suspended(&host->card->dev);
1976 }
1977
1978 return err;
1979}
1980
1981/*
1982 * This function tries to determine if the same card is still present
1983 * and, if so, restore all state to it.
1984 */
1985static int _mmc_resume(struct mmc_host *host)
1986{
1987 int err = 0;
1988
1989 mmc_claim_host(host);
1990
1991 if (!mmc_card_suspended(host->card))
1992 goto out;
1993
1994 mmc_power_up(host, host->card->ocr);
1995 err = mmc_init_card(host, host->card->ocr, host->card);
1996 mmc_card_clr_suspended(host->card);
1997
1998out:
1999 mmc_release_host(host);
2000 return err;
2001}
2002
2003/*
2004 * Shutdown callback
2005 */
2006static int mmc_shutdown(struct mmc_host *host)
2007{
2008 int err = 0;
2009
2010 /*
2011 * In a specific case for poweroff notify, we need to resume the card
2012 * before we can shutdown it properly.
2013 */
2014 if (mmc_can_poweroff_notify(host->card) &&
2015 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2016 err = _mmc_resume(host);
2017
2018 if (!err)
2019 err = _mmc_suspend(host, false);
2020
2021 return err;
2022}
2023
2024/*
2025 * Callback for resume.
2026 */
2027static int mmc_resume(struct mmc_host *host)
2028{
2029 pm_runtime_enable(&host->card->dev);
2030 return 0;
2031}
2032
2033/*
2034 * Callback for runtime_suspend.
2035 */
2036static int mmc_runtime_suspend(struct mmc_host *host)
2037{
2038 int err;
2039
2040 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2041 return 0;
2042
2043 err = _mmc_suspend(host, true);
2044 if (err)
2045 pr_err("%s: error %d doing aggressive suspend\n",
2046 mmc_hostname(host), err);
2047
2048 return err;
2049}
2050
2051/*
2052 * Callback for runtime_resume.
2053 */
2054static int mmc_runtime_resume(struct mmc_host *host)
2055{
2056 int err;
2057
2058 err = _mmc_resume(host);
2059 if (err && err != -ENOMEDIUM)
2060 pr_err("%s: error %d doing runtime resume\n",
2061 mmc_hostname(host), err);
2062
2063 return 0;
2064}
2065
2066int mmc_can_reset(struct mmc_card *card)
2067{
2068 u8 rst_n_function;
2069
2070 rst_n_function = card->ext_csd.rst_n_function;
2071 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2072 return 0;
2073 return 1;
2074}
2075EXPORT_SYMBOL(mmc_can_reset);
2076
2077static int mmc_reset(struct mmc_host *host)
2078{
2079 struct mmc_card *card = host->card;
2080
2081 /*
2082 * In the case of recovery, we can't expect flushing the cache to work
2083 * always, but we have a go and ignore errors.
2084 */
2085 mmc_flush_cache(host->card);
2086
2087 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2088 mmc_can_reset(card)) {
2089 /* If the card accept RST_n signal, send it. */
2090 mmc_set_clock(host, host->f_init);
2091 host->ops->hw_reset(host);
2092 /* Set initial state and call mmc_set_ios */
2093 mmc_set_initial_state(host);
2094 } else {
2095 /* Do a brute force power cycle */
2096 mmc_power_cycle(host, card->ocr);
2097 }
2098 return mmc_init_card(host, card->ocr, card);
2099}
2100
2101static const struct mmc_bus_ops mmc_ops = {
2102 .remove = mmc_remove,
2103 .detect = mmc_detect,
2104 .suspend = mmc_suspend,
2105 .resume = mmc_resume,
2106 .runtime_suspend = mmc_runtime_suspend,
2107 .runtime_resume = mmc_runtime_resume,
2108 .alive = mmc_alive,
2109 .shutdown = mmc_shutdown,
2110 .reset = mmc_reset,
2111};
2112
2113/*
2114 * Starting point for MMC card init.
2115 */
2116int mmc_attach_mmc(struct mmc_host *host)
2117{
2118 int err;
2119 u32 ocr, rocr;
2120
2121 WARN_ON(!host->claimed);
2122
2123 /* Set correct bus mode for MMC before attempting attach */
2124 if (!mmc_host_is_spi(host))
2125 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2126
2127 err = mmc_send_op_cond(host, 0, &ocr);
2128 if (err)
2129 return err;
2130
2131 mmc_attach_bus(host, &mmc_ops);
2132 if (host->ocr_avail_mmc)
2133 host->ocr_avail = host->ocr_avail_mmc;
2134
2135 /*
2136 * We need to get OCR a different way for SPI.
2137 */
2138 if (mmc_host_is_spi(host)) {
2139 err = mmc_spi_read_ocr(host, 1, &ocr);
2140 if (err)
2141 goto err;
2142 }
2143
2144 rocr = mmc_select_voltage(host, ocr);
2145
2146 /*
2147 * Can we support the voltage of the card?
2148 */
2149 if (!rocr) {
2150 err = -EINVAL;
2151 goto err;
2152 }
2153
2154 /*
2155 * Detect and init the card.
2156 */
2157 err = mmc_init_card(host, rocr, NULL);
2158 if (err)
2159 goto err;
2160
2161 mmc_release_host(host);
2162 err = mmc_add_card(host->card);
2163 if (err)
2164 goto remove_card;
2165
2166 mmc_claim_host(host);
2167 return 0;
2168
2169remove_card:
2170 mmc_remove_card(host->card);
2171 mmc_claim_host(host);
2172 host->card = NULL;
2173err:
2174 mmc_detach_bus(host);
2175
2176 pr_err("%s: error %d whilst initialising MMC card\n",
2177 mmc_hostname(host), err);
2178
2179 return err;
2180}