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mmc: sdhci: Avoid swiotlb buffer being full
[thirdparty/kernel/stable.git] / drivers / mmc / core / mmc.c
CommitLineData
7ea239d9 1/*
70f10482 2 * linux/drivers/mmc/core/mmc.c
7ea239d9
PO		 3 *
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/err.h>
81f8a7be 14#include <linux/of.h>
5a0e3ad6 15#include <linux/slab.h>
0205a904 16#include <linux/stat.h>
0cb403a2 17#include <linux/pm_runtime.h>
7ea239d9
PO		 18
19#include <linux/mmc/host.h>
20#include <linux/mmc/card.h>
21#include <linux/mmc/mmc.h>
22
23#include "core.h"
4facdde1 24#include "card.h"
436f8daa 25#include "host.h"
4101c16a 26#include "bus.h"
7ea239d9 27#include "mmc_ops.h"
28fc64af 28#include "quirks.h"
4c4cb171 29#include "sd_ops.h"
52c8212d 30#include "pwrseq.h"
7ea239d9 31
fe1b5700
UH		 32#define DEFAULT_CMD6_TIMEOUT_MS 500
33
7ea239d9
PO		 34static const unsigned int tran_exp[] = {
35 10000, 100000, 1000000, 10000000,
36 0, 0, 0, 0
37};
38
39static const unsigned char tran_mant[] = {
40 0, 10, 12, 13, 15, 20, 25, 30,
41 35, 40, 45, 50, 55, 60, 70, 80,
42};
43
4406ae21 44static const unsigned int taac_exp[] = {
7ea239d9
PO		 45 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
46};
47
4406ae21 48static const unsigned int taac_mant[] = {
7ea239d9
PO		 49 0, 10, 12, 13, 15, 20, 25, 30,
50 35, 40, 45, 50, 55, 60, 70, 80,
51};
52
53#define UNSTUFF_BITS(resp,start,size) \
54 ({ \
55 const int __size = size; \
56 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
57 const int __off = 3 - ((start) / 32); \
58 const int __shft = (start) & 31; \
59 u32 __res; \
60 \
61 __res = resp[__off] >> __shft; \
62 if (__size + __shft > 32) \
63 __res |= resp[__off-1] << ((32 - __shft) % 32); \
64 __res & __mask; \
65 })
66
67/*
68 * Given the decoded CSD structure, decode the raw CID to our CID structure.
69 */
bd766312 70static int mmc_decode_cid(struct mmc_card *card)
7ea239d9
PO		 71{
72 u32 *resp = card->raw_cid;
73
74 /*
75 * The selection of the format here is based upon published
76 * specs from sandisk and from what people have reported.
77 */
78 switch (card->csd.mmca_vsn) {
79 case 0: /* MMC v1.0 - v1.2 */
80 case 1: /* MMC v1.4 */
81 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
82 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
83 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
84 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
85 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
86 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
87 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
88 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
89 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
90 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
91 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
92 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
93 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
94 break;
95
96 case 2: /* MMC v2.0 - v2.2 */
97 case 3: /* MMC v3.1 - v3.3 */
98 case 4: /* MMC v4 */
99 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
100 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
101 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
102 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
103 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
104 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
105 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
106 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
51e7e8b6 107 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
7ea239d9
PO		 108 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
109 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
110 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
111 break;
112
113 default:
a3c76eb9 114 pr_err("%s: card has unknown MMCA version %d\n",
7ea239d9 115 mmc_hostname(card->host), card->csd.mmca_vsn);
bd766312 116 return -EINVAL;
7ea239d9 117 }
bd766312
PO		 118
119 return 0;
7ea239d9
PO		 120}
121
dfe86cba
AH		 122static void mmc_set_erase_size(struct mmc_card *card)
123{
124 if (card->ext_csd.erase_group_def & 1)
125 card->erase_size = card->ext_csd.hc_erase_size;
126 else
127 card->erase_size = card->csd.erase_size;
128
129 mmc_init_erase(card);
130}
131
7ea239d9
PO		 132/*
133 * Given a 128-bit response, decode to our card CSD structure.
134 */
bd766312 135static int mmc_decode_csd(struct mmc_card *card)
7ea239d9
PO		 136{
137 struct mmc_csd *csd = &card->csd;
dfe86cba 138 unsigned int e, m, a, b;
7ea239d9
PO		 139 u32 *resp = card->raw_csd;
140
141 /*
142 * We only understand CSD structure v1.1 and v1.2.
143 * v1.2 has extra information in bits 15, 11 and 10.
6da24b78 144 * We also support eMMC v4.4 & v4.41.
7ea239d9 145 */
6da24b78
KP		 146 csd->structure = UNSTUFF_BITS(resp, 126, 2);
147 if (csd->structure == 0) {
a3c76eb9 148 pr_err("%s: unrecognised CSD structure version %d\n",
6da24b78 149 mmc_hostname(card->host), csd->structure);
bd766312 150 return -EINVAL;
7ea239d9
PO		 151 }
152
153 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
154 m = UNSTUFF_BITS(resp, 115, 4);
155 e = UNSTUFF_BITS(resp, 112, 3);
4406ae21
SL		 156 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
157 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
7ea239d9
PO		 158
159 m = UNSTUFF_BITS(resp, 99, 4);
160 e = UNSTUFF_BITS(resp, 96, 3);
161 csd->max_dtr = tran_exp[e] * tran_mant[m];
162 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
163
164 e = UNSTUFF_BITS(resp, 47, 3);
165 m = UNSTUFF_BITS(resp, 62, 12);
166 csd->capacity = (1 + m) << (e + 2);
167
168 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
169 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
170 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
171 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
3d705d14 172 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
7ea239d9
PO		 173 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
174 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
175 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
bd766312 176
dfe86cba
AH		 177 if (csd->write_blkbits >= 9) {
178 a = UNSTUFF_BITS(resp, 42, 5);
179 b = UNSTUFF_BITS(resp, 37, 5);
180 csd->erase_size = (a + 1) * (b + 1);
181 csd->erase_size <<= csd->write_blkbits - 9;
182 }
183
bd766312 184 return 0;
7ea239d9
PO		 185}
186
96cf5f02
SJ		 187static void mmc_select_card_type(struct mmc_card *card)
188{
189 struct mmc_host *host = card->host;
0a5b6438 190 u8 card_type = card->ext_csd.raw_card_type;
5f1a4dd0 191 u32 caps = host->caps, caps2 = host->caps2;
577fb131 192 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
2415c0ef 193 unsigned int avail_type = 0;
96cf5f02 194
2415c0ef
SJ		 195 if (caps & MMC_CAP_MMC_HIGHSPEED &&
196 card_type & EXT_CSD_CARD_TYPE_HS_26) {
96cf5f02 197 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
2415c0ef
SJ		 198 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
199 }
96cf5f02
SJ		 200
201 if (caps & MMC_CAP_MMC_HIGHSPEED &&
2415c0ef 202 card_type & EXT_CSD_CARD_TYPE_HS_52) {
96cf5f02 203 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
2415c0ef
SJ		 204 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
205 }
96cf5f02 206
20f921bb 207 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
2415c0ef 208 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
96cf5f02 209 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
2415c0ef
SJ		 210 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
211 }
212
213 if (caps & MMC_CAP_1_2V_DDR &&
214 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
215 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
216 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
217 }
96cf5f02 218
2415c0ef
SJ		 219 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
220 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
577fb131 221 hs200_max_dtr = MMC_HS200_MAX_DTR;
2415c0ef
SJ		 222 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
223 }
224
225 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
226 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
577fb131 227 hs200_max_dtr = MMC_HS200_MAX_DTR;
2415c0ef
SJ		 228 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
229 }
96cf5f02 230
0a5b6438
SJ		 231 if (caps2 & MMC_CAP2_HS400_1_8V &&
232 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
233 hs200_max_dtr = MMC_HS200_MAX_DTR;
234 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
235 }
236
237 if (caps2 & MMC_CAP2_HS400_1_2V &&
238 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
239 hs200_max_dtr = MMC_HS200_MAX_DTR;
240 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
241 }
242
81ac2af6
SL		 243 if ((caps2 & MMC_CAP2_HS400_ES) &&
244 card->ext_csd.strobe_support &&
245 (avail_type & EXT_CSD_CARD_TYPE_HS400))
246 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
247
96cf5f02 248 card->ext_csd.hs_max_dtr = hs_max_dtr;
577fb131 249 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
2415c0ef 250 card->mmc_avail_type = avail_type;
96cf5f02
SJ		 251}
252
b4493eea
GS		 253static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
254{
994324bb
GS		 255 u8 hc_erase_grp_sz, hc_wp_grp_sz;
256
257 /*
258 * Disable these attributes by default
259 */
260 card->ext_csd.enhanced_area_offset = -EINVAL;
261 card->ext_csd.enhanced_area_size = -EINVAL;
b4493eea
GS		 262
263 /*
264 * Enhanced area feature support -- check whether the eMMC
265 * card has the Enhanced area enabled. If so, export enhanced
266 * area offset and size to user by adding sysfs interface.
267 */
268 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
269 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
994324bb
GS		 270 if (card->ext_csd.partition_setting_completed) {
271 hc_erase_grp_sz =
272 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
273 hc_wp_grp_sz =
274 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
b4493eea 275
994324bb
GS		 276 /*
277 * calculate the enhanced data area offset, in bytes
278 */
279 card->ext_csd.enhanced_area_offset =
ded8a5f9
KM		 280 (((unsigned long long)ext_csd[139]) << 24) +
281 (((unsigned long long)ext_csd[138]) << 16) +
282 (((unsigned long long)ext_csd[137]) << 8) +
283 (((unsigned long long)ext_csd[136]));
994324bb
GS		 284 if (mmc_card_blockaddr(card))
285 card->ext_csd.enhanced_area_offset <<= 9;
286 /*
287 * calculate the enhanced data area size, in kilobytes
288 */
289 card->ext_csd.enhanced_area_size =
290 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
291 ext_csd[140];
292 card->ext_csd.enhanced_area_size *=
293 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
294 card->ext_csd.enhanced_area_size <<= 9;
295 } else {
296 pr_warn("%s: defines enhanced area without partition setting complete\n",
297 mmc_hostname(card->host));
298 }
b4493eea
GS		 299 }
300}
301
4facdde1
UH		 302static void mmc_part_add(struct mmc_card *card, unsigned int size,
303 unsigned int part_cfg, char *name, int idx, bool ro,
304 int area_type)
305{
306 card->part[card->nr_parts].size = size;
307 card->part[card->nr_parts].part_cfg = part_cfg;
308 sprintf(card->part[card->nr_parts].name, name, idx);
309 card->part[card->nr_parts].force_ro = ro;
310 card->part[card->nr_parts].area_type = area_type;
311 card->nr_parts++;
312}
313
b4493eea
GS		 314static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
315{
b4493eea 316 int idx;
994324bb
GS		 317 u8 hc_erase_grp_sz, hc_wp_grp_sz;
318 unsigned int part_size;
b4493eea
GS		 319
320 /*
321 * General purpose partition feature support --
322 * If ext_csd has the size of general purpose partitions,
323 * set size, part_cfg, partition name in mmc_part.
324 */
325 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
326 EXT_CSD_PART_SUPPORT_PART_EN) {
994324bb
GS		 327 hc_erase_grp_sz =
328 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
329 hc_wp_grp_sz =
330 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
b4493eea
GS		 331
332 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
333 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
334 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
335 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
336 continue;
994324bb
GS		 337 if (card->ext_csd.partition_setting_completed == 0) {
338 pr_warn("%s: has partition size defined without partition complete\n",
339 mmc_hostname(card->host));
340 break;
341 }
b4493eea
GS		 342 part_size =
343 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
344 << 16) +
345 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
346 << 8) +
347 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
348 part_size *= (size_t)(hc_erase_grp_sz *
349 hc_wp_grp_sz);
350 mmc_part_add(card, part_size << 19,
351 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
352 "gp%d", idx, false,
353 MMC_BLK_DATA_AREA_GP);
354 }
355 }
356}
357
1c447116
AH		 358/* Minimum partition switch timeout in milliseconds */
359#define MMC_MIN_PART_SWITCH_TIME 300
360
08ee80cc
PR		 361/*
362 * Decode extended CSD.
363 */
076ec38a 364static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
08ee80cc 365{
e0c368d5
NJ		 366 int err = 0, idx;
367 unsigned int part_size;
81f8a7be
HG		 368 struct device_node *np;
369 bool broken_hpi = false;
08ee80cc 370
6da24b78 371 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
f39b2dd9 372 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
6da24b78 373 if (card->csd.structure == 3) {
f39b2dd9 374 if (card->ext_csd.raw_ext_csd_structure > 2) {
a3c76eb9 375 pr_err("%s: unrecognised EXT_CSD structure "
6da24b78 376 "version %d\n", mmc_hostname(card->host),
f39b2dd9 377 card->ext_csd.raw_ext_csd_structure);
6da24b78
KP		 378 err = -EINVAL;
379 goto out;
380 }
381 }
382
81f8a7be
HG		 383 np = mmc_of_find_child_device(card->host, 0);
384 if (np && of_device_is_compatible(np, "mmc-card"))
385 broken_hpi = of_property_read_bool(np, "broken-hpi");
386 of_node_put(np);
387
03a59437
RI		 388 /*
389 * The EXT_CSD format is meant to be forward compatible. As long
390 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
391 * are authorized, see JEDEC JESD84-B50 section B.8.
392 */
b1ebe384 393 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
d7604d76 394
5320226a
P		 395 /* fixup device after ext_csd revision field is updated */
396 mmc_fixup_device(card, mmc_ext_csd_fixups);
397
f39b2dd9
PR		 398 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
399 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
400 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
401 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
b1ebe384 402 if (card->ext_csd.rev >= 2) {
d7604d76
PO		 403 card->ext_csd.sectors =
404 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
405 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
406 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
407 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
fc8a0985
HP		 408
409 /* Cards with density > 2GiB are sector addressed */
410 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
d7604d76
PO		 411 mmc_card_set_blockaddr(card);
412 }
96cf5f02 413
81ac2af6 414 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
f39b2dd9 415 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
96cf5f02 416 mmc_select_card_type(card);
7ea239d9 417
f39b2dd9
PR		 418 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
419 card->ext_csd.raw_erase_timeout_mult =
420 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
421 card->ext_csd.raw_hc_erase_grp_size =
422 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
b1ebe384
JL		 423 if (card->ext_csd.rev >= 3) {
424 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
371a689f
AW		 425 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
426
427 /* EXT_CSD value is in units of 10ms, but we store in ms */
428 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
1c447116
AH		 429 /* Some eMMC set the value too low so set a minimum */
430 if (card->ext_csd.part_time &&
431 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
432 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
b1ebe384
JL		 433
434 /* Sleep / awake timeout in 100ns units */
435 if (sa_shift > 0 && sa_shift <= 0x17)
436 card->ext_csd.sa_timeout =
437 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
dfe86cba
AH		 438 card->ext_csd.erase_group_def =
439 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
440 card->ext_csd.hc_erase_timeout = 300 *
441 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
442 card->ext_csd.hc_erase_size =
443 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
f4c5522b
AW		 444
445 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
371a689f
AW		 446
447 /*
448 * There are two boot regions of equal size, defined in
449 * multiples of 128K.
450 */
e0c368d5
NJ		 451 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
452 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
453 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
454 mmc_part_add(card, part_size,
455 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
add710ea
JR		 456 "boot%d", idx, true,
457 MMC_BLK_DATA_AREA_BOOT);
e0c368d5
NJ		 458 }
459 }
dfe86cba
AH		 460 }
461
f39b2dd9 462 card->ext_csd.raw_hc_erase_gap_size =
dd13b4ed 463 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
f39b2dd9
PR		 464 card->ext_csd.raw_sec_trim_mult =
465 ext_csd[EXT_CSD_SEC_TRIM_MULT];
466 card->ext_csd.raw_sec_erase_mult =
467 ext_csd[EXT_CSD_SEC_ERASE_MULT];
468 card->ext_csd.raw_sec_feature_support =
469 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
470 card->ext_csd.raw_trim_mult =
471 ext_csd[EXT_CSD_TRIM_MULT];
836dc2fe 472 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
b097e07f 473 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
dfe86cba 474 if (card->ext_csd.rev >= 4) {
69803d4f
GS		 475 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
476 EXT_CSD_PART_SETTING_COMPLETED)
477 card->ext_csd.partition_setting_completed = 1;
478 else
479 card->ext_csd.partition_setting_completed = 0;
480
b4493eea 481 mmc_manage_enhanced_area(card, ext_csd);
709de99d 482
b4493eea 483 mmc_manage_gp_partitions(card, ext_csd);
e0c368d5 484
dfe86cba
AH		 485 card->ext_csd.sec_trim_mult =
486 ext_csd[EXT_CSD_SEC_TRIM_MULT];
487 card->ext_csd.sec_erase_mult =
488 ext_csd[EXT_CSD_SEC_ERASE_MULT];
489 card->ext_csd.sec_feature_support =
490 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
491 card->ext_csd.trim_timeout = 300 *
492 ext_csd[EXT_CSD_TRIM_MULT];
add710ea
JR		 493
494 /*
495 * Note that the call to mmc_part_add above defaults to read
496 * only. If this default assumption is changed, the call must
497 * take into account the value of boot_locked below.
498 */
499 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
500 card->ext_csd.boot_ro_lockable = true;
60443712
FS		 501
502 /* Save power class values */
503 card->ext_csd.raw_pwr_cl_52_195 =
504 ext_csd[EXT_CSD_PWR_CL_52_195];
505 card->ext_csd.raw_pwr_cl_26_195 =
506 ext_csd[EXT_CSD_PWR_CL_26_195];
507 card->ext_csd.raw_pwr_cl_52_360 =
508 ext_csd[EXT_CSD_PWR_CL_52_360];
509 card->ext_csd.raw_pwr_cl_26_360 =
510 ext_csd[EXT_CSD_PWR_CL_26_360];
511 card->ext_csd.raw_pwr_cl_200_195 =
512 ext_csd[EXT_CSD_PWR_CL_200_195];
513 card->ext_csd.raw_pwr_cl_200_360 =
514 ext_csd[EXT_CSD_PWR_CL_200_360];
515 card->ext_csd.raw_pwr_cl_ddr_52_195 =
516 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
517 card->ext_csd.raw_pwr_cl_ddr_52_360 =
518 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
0a5b6438
SJ		 519 card->ext_csd.raw_pwr_cl_ddr_200_360 =
520 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
b1ebe384
JL		 521 }
522
b2499518 523 if (card->ext_csd.rev >= 5) {
7c4f10ac
RI		 524 /* Adjust production date as per JEDEC JESD84-B451 */
525 if (card->cid.year < 2010)
526 card->cid.year += 16;
527
950d56ac 528 /* check whether the eMMC card supports BKOPS */
5320226a
P		 529 if (!mmc_card_broken_hpi(card) &&
530 ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
950d56ac 531 card->ext_csd.bkops = 1;
0501be64
AS		 532 card->ext_csd.man_bkops_en =
533 (ext_csd[EXT_CSD_BKOPS_EN] &
534 EXT_CSD_MANUAL_BKOPS_MASK);
950d56ac
JC		 535 card->ext_csd.raw_bkops_status =
536 ext_csd[EXT_CSD_BKOPS_STATUS];
6962c2fb
UY		 537 if (card->ext_csd.man_bkops_en)
538 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
950d56ac 539 mmc_hostname(card->host));
efff8e78
UY		 540 card->ext_csd.auto_bkops_en =
541 (ext_csd[EXT_CSD_BKOPS_EN] &
542 EXT_CSD_AUTO_BKOPS_MASK);
543 if (card->ext_csd.auto_bkops_en)
544 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
545 mmc_hostname(card->host));
950d56ac
JC		 546 }
547
eb0d8f13 548 /* check whether the eMMC card supports HPI */
5320226a
P		 549 if (!mmc_card_broken_hpi(card) &&
550 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
eb0d8f13
JC		 551 card->ext_csd.hpi = 1;
552 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
553 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
554 else
555 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
556 /*
557 * Indicate the maximum timeout to close
558 * a command interrupted by HPI
559 */
560 card->ext_csd.out_of_int_time =
561 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
562 }
563
f4c5522b 564 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
b2499518 565 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
090d25fe
LP		 566
567 /*
568 * RPMB regions are defined in multiples of 128K.
569 */
570 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
d0123cca 571 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
090d25fe
LP		 572 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
573 EXT_CSD_PART_CONFIG_ACC_RPMB,
574 "rpmb", 0, false,
575 MMC_BLK_DATA_AREA_RPMB);
576 }
b2499518 577 }
f4c5522b 578
5238acbe 579 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
dfe86cba
AH		 580 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
581 card->erased_byte = 0xFF;
582 else
583 card->erased_byte = 0x0;
584
336c716a 585 /* eMMC v4.5 or later */
fe1b5700 586 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
bec8726a 587 if (card->ext_csd.rev >= 6) {
336c716a
SJ		 588 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
589
b23cf0bd
SJ		 590 card->ext_csd.generic_cmd6_time = 10 *
591 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
bec8726a
G		 592 card->ext_csd.power_off_longtime = 10 *
593 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
b23cf0bd 594
336c716a
SJ		 595 card->ext_csd.cache_size =
596 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
597 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
598 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
599 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
4265900e
SD		 600
601 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
602 card->ext_csd.data_sector_size = 4096;
603 else
604 card->ext_csd.data_sector_size = 512;
605
606 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
607 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
608 card->ext_csd.data_tag_unit_size =
609 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
610 (card->ext_csd.data_sector_size);
611 } else {
612 card->ext_csd.data_tag_unit_size = 0;
613 }
abd9ac14
SJ		 614
615 card->ext_csd.max_packed_writes =
616 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
617 card->ext_csd.max_packed_reads =
618 ext_csd[EXT_CSD_MAX_PACKED_READS];
a5075eb9
SD		 619 } else {
620 card->ext_csd.data_sector_size = 512;
336c716a 621 }
881d1c25 622
0f762426
GG		 623 /* eMMC v5 or later */
624 if (card->ext_csd.rev >= 7) {
625 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
626 MMC_FIRMWARE_LEN);
627 card->ext_csd.ffu_capable =
628 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
629 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
46bc5c40
JL		 630
631 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
632 card->ext_csd.device_life_time_est_typ_a =
633 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
634 card->ext_csd.device_life_time_est_typ_b =
635 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
0f762426 636 }
925ff3a7
AH		 637
638 /* eMMC v5.1 or later */
639 if (card->ext_csd.rev >= 8) {
640 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
641 EXT_CSD_CMDQ_SUPPORTED;
642 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
643 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
644 /* Exclude inefficiently small queue depths */
645 if (card->ext_csd.cmdq_depth <= 2) {
646 card->ext_csd.cmdq_support = false;
647 card->ext_csd.cmdq_depth = 0;
648 }
649 if (card->ext_csd.cmdq_support) {
650 pr_debug("%s: Command Queue supported depth %u\n",
651 mmc_hostname(card->host),
652 card->ext_csd.cmdq_depth);
653 }
654 }
7ea239d9 655out:
08ee80cc
PR		 656 return err;
657}
658
076ec38a
UH		 659static int mmc_read_ext_csd(struct mmc_card *card)
660{
c197787c 661 u8 *ext_csd;
076ec38a
UH		 662 int err;
663
c197787c
UH		 664 if (!mmc_can_ext_csd(card))
665 return 0;
666
076ec38a 667 err = mmc_get_ext_csd(card, &ext_csd);
c197787c
UH		 668 if (err) {
669 /* If the host or the card can't do the switch,
670 * fail more gracefully. */
671 if ((err != -EINVAL)
672 && (err != -ENOSYS)
673 && (err != -EFAULT))
674 return err;
675
676 /*
677 * High capacity cards should have this "magic" size
678 * stored in their CSD.
679 */
680 if (card->csd.capacity == (4096 * 512)) {
681 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
682 mmc_hostname(card->host));
683 } else {
684 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
685 mmc_hostname(card->host));
686 err = 0;
687 }
688
076ec38a 689 return err;
c197787c 690 }
076ec38a
UH		 691
692 err = mmc_decode_ext_csd(card, ext_csd);
693 kfree(ext_csd);
694 return err;
695}
696
f39b2dd9 697static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
08ee80cc
PR		 698{
699 u8 *bw_ext_csd;
700 int err;
701
f39b2dd9
PR		 702 if (bus_width == MMC_BUS_WIDTH_1)
703 return 0;
704
08ee80cc 705 err = mmc_get_ext_csd(card, &bw_ext_csd);
c197787c
UH		 706 if (err)
707 return err;
08ee80cc 708
08ee80cc 709 /* only compare read only fields */
dd13b4ed 710 err = !((card->ext_csd.raw_partition_support ==
08ee80cc 711 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
f39b2dd9 712 (card->ext_csd.raw_erased_mem_count ==
08ee80cc 713 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
f39b2dd9 714 (card->ext_csd.rev ==
08ee80cc 715 bw_ext_csd[EXT_CSD_REV]) &&
f39b2dd9 716 (card->ext_csd.raw_ext_csd_structure ==
08ee80cc 717 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
f39b2dd9 718 (card->ext_csd.raw_card_type ==
08ee80cc 719 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
f39b2dd9 720 (card->ext_csd.raw_s_a_timeout ==
08ee80cc 721 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
f39b2dd9 722 (card->ext_csd.raw_hc_erase_gap_size ==
08ee80cc 723 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
f39b2dd9 724 (card->ext_csd.raw_erase_timeout_mult ==
08ee80cc 725 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
f39b2dd9 726 (card->ext_csd.raw_hc_erase_grp_size ==
08ee80cc 727 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
f39b2dd9 728 (card->ext_csd.raw_sec_trim_mult ==
08ee80cc 729 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
f39b2dd9 730 (card->ext_csd.raw_sec_erase_mult ==
08ee80cc 731 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
f39b2dd9 732 (card->ext_csd.raw_sec_feature_support ==
08ee80cc 733 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
f39b2dd9 734 (card->ext_csd.raw_trim_mult ==
08ee80cc 735 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
f39b2dd9
PR		 736 (card->ext_csd.raw_sectors[0] ==
737 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
738 (card->ext_csd.raw_sectors[1] ==
739 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
740 (card->ext_csd.raw_sectors[2] ==
741 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
742 (card->ext_csd.raw_sectors[3] ==
60443712
FS		 743 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
744 (card->ext_csd.raw_pwr_cl_52_195 ==
745 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
746 (card->ext_csd.raw_pwr_cl_26_195 ==
747 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
748 (card->ext_csd.raw_pwr_cl_52_360 ==
749 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
750 (card->ext_csd.raw_pwr_cl_26_360 ==
751 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
752 (card->ext_csd.raw_pwr_cl_200_195 ==
753 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
754 (card->ext_csd.raw_pwr_cl_200_360 ==
755 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
756 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
757 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
758 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
0a5b6438
SJ		 759 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
760 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
761 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
762
08ee80cc
PR		 763 if (err)
764 err = -EINVAL;
765
00b41b58 766 kfree(bw_ext_csd);
7ea239d9
PO		 767 return err;
768}
769
51ec92e2
PO		 770MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
771 card->raw_cid[2], card->raw_cid[3]);
772MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
773 card->raw_csd[2], card->raw_csd[3]);
774MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
dfe86cba
AH		 775MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
776MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
0f762426 777MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
51ec92e2
PO		 778MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
779MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
780MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
781MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
51e7e8b6 782MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
04fa0540 783MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
46bc5c40
JL		 784MMC_DEV_ATTR(pre_eol_info, "%02x\n", card->ext_csd.pre_eol_info);
785MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
786 card->ext_csd.device_life_time_est_typ_a,
787 card->ext_csd.device_life_time_est_typ_b);
51ec92e2 788MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
709de99d
CD		 789MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
790 card->ext_csd.enhanced_area_offset);
791MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
188cc042
LP		 792MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
793MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
5fb06af7 794MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
b658af71 795MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
51ec92e2 796
0f762426
GG		 797static ssize_t mmc_fwrev_show(struct device *dev,
798 struct device_attribute *attr,
799 char *buf)
800{
801 struct mmc_card *card = mmc_dev_to_card(dev);
802
803 if (card->ext_csd.rev < 7) {
804 return sprintf(buf, "0x%x\n", card->cid.fwrev);
805 } else {
806 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
807 card->ext_csd.fwrev);
808 }
809}
810
811static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
812
6825a606
BP		 813static ssize_t mmc_dsr_show(struct device *dev,
814 struct device_attribute *attr,
815 char *buf)
816{
817 struct mmc_card *card = mmc_dev_to_card(dev);
818 struct mmc_host *host = card->host;
819
820 if (card->csd.dsr_imp && host->dsr_req)
821 return sprintf(buf, "0x%x\n", host->dsr);
822 else
823 /* return default DSR value */
824 return sprintf(buf, "0x%x\n", 0x404);
825}
826
827static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
828
51ec92e2
PO		 829static struct attribute *mmc_std_attrs[] = {
830 &dev_attr_cid.attr,
831 &dev_attr_csd.attr,
832 &dev_attr_date.attr,
dfe86cba
AH		 833 &dev_attr_erase_size.attr,
834 &dev_attr_preferred_erase_size.attr,
51ec92e2 835 &dev_attr_fwrev.attr,
0f762426 836 &dev_attr_ffu_capable.attr,
51ec92e2
PO		 837 &dev_attr_hwrev.attr,
838 &dev_attr_manfid.attr,
839 &dev_attr_name.attr,
840 &dev_attr_oemid.attr,
51e7e8b6 841 &dev_attr_prv.attr,
04fa0540 842 &dev_attr_rev.attr,
46bc5c40
JL		 843 &dev_attr_pre_eol_info.attr,
844 &dev_attr_life_time.attr,
51ec92e2 845 &dev_attr_serial.attr,
709de99d
CD		 846 &dev_attr_enhanced_area_offset.attr,
847 &dev_attr_enhanced_area_size.attr,
188cc042
LP		 848 &dev_attr_raw_rpmb_size_mult.attr,
849 &dev_attr_rel_sectors.attr,
5fb06af7 850 &dev_attr_ocr.attr,
6825a606 851 &dev_attr_dsr.attr,
b658af71 852 &dev_attr_cmdq_en.attr,
51ec92e2
PO		 853 NULL,
854};
d1e58212 855ATTRIBUTE_GROUPS(mmc_std);
51ec92e2
PO		 856
857static struct device_type mmc_type = {
d1e58212 858 .groups = mmc_std_groups,
51ec92e2
PO		 859};
860
b87d8dbf
G		 861/*
862 * Select the PowerClass for the current bus width
863 * If power class is defined for 4/8 bit bus in the
864 * extended CSD register, select it by executing the
865 * mmc_switch command.
866 */
2385049d
SJ		 867static int __mmc_select_powerclass(struct mmc_card *card,
868 unsigned int bus_width)
b87d8dbf 869{
2385049d
SJ		 870 struct mmc_host *host = card->host;
871 struct mmc_ext_csd *ext_csd = &card->ext_csd;
60443712 872 unsigned int pwrclass_val = 0;
2385049d 873 int err = 0;
b87d8dbf 874
b87d8dbf
G		 875 switch (1 << host->ios.vdd) {
876 case MMC_VDD_165_195:
2385049d
SJ		 877 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
878 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
879 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
60443712 880 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
2385049d
SJ		 881 ext_csd->raw_pwr_cl_52_195 :
882 ext_csd->raw_pwr_cl_ddr_52_195;
883 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
884 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
b87d8dbf 885 break;
93fc5a47
SJ		 886 case MMC_VDD_27_28:
887 case MMC_VDD_28_29:
888 case MMC_VDD_29_30:
889 case MMC_VDD_30_31:
890 case MMC_VDD_31_32:
b87d8dbf
G		 891 case MMC_VDD_32_33:
892 case MMC_VDD_33_34:
893 case MMC_VDD_34_35:
894 case MMC_VDD_35_36:
2385049d
SJ		 895 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
896 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
897 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
60443712 898 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
2385049d
SJ		 899 ext_csd->raw_pwr_cl_52_360 :
900 ext_csd->raw_pwr_cl_ddr_52_360;
901 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
0a5b6438
SJ		 902 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
903 ext_csd->raw_pwr_cl_ddr_200_360 :
904 ext_csd->raw_pwr_cl_200_360;
b87d8dbf
G		 905 break;
906 default:
6606110d
JP		 907 pr_warn("%s: Voltage range not supported for power class\n",
908 mmc_hostname(host));
b87d8dbf
G		 909 return -EINVAL;
910 }
911
b87d8dbf
G		 912 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
913 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
914 EXT_CSD_PWR_CL_8BIT_SHIFT;
915 else
916 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
917 EXT_CSD_PWR_CL_4BIT_SHIFT;
918
919 /* If the power class is different from the default value */
920 if (pwrclass_val > 0) {
921 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
922 EXT_CSD_POWER_CLASS,
923 pwrclass_val,
71fe3eb0 924 card->ext_csd.generic_cmd6_time);
b87d8dbf
G		 925 }
926
927 return err;
928}
929
2385049d
SJ		 930static int mmc_select_powerclass(struct mmc_card *card)
931{
932 struct mmc_host *host = card->host;
933 u32 bus_width, ext_csd_bits;
934 int err, ddr;
935
936 /* Power class selection is supported for versions >= 4.0 */
148bcab2 937 if (!mmc_can_ext_csd(card))
2385049d
SJ		 938 return 0;
939
940 bus_width = host->ios.bus_width;
941 /* Power class values are defined only for 4/8 bit bus */
942 if (bus_width == MMC_BUS_WIDTH_1)
943 return 0;
944
945 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
946 if (ddr)
947 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
948 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
949 else
950 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
951 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
952
953 err = __mmc_select_powerclass(card, ext_csd_bits);
954 if (err)
955 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
956 mmc_hostname(host), 1 << bus_width, ddr);
957
958 return err;
959}
960
a4924c71 961/*
577fb131 962 * Set the bus speed for the selected speed mode.
a4924c71 963 */
577fb131
SJ		 964static void mmc_set_bus_speed(struct mmc_card *card)
965{
966 unsigned int max_dtr = (unsigned int)-1;
967
0a5b6438
SJ		 968 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
969 max_dtr > card->ext_csd.hs200_max_dtr)
577fb131
SJ		 970 max_dtr = card->ext_csd.hs200_max_dtr;
971 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
972 max_dtr = card->ext_csd.hs_max_dtr;
973 else if (max_dtr > card->csd.max_dtr)
974 max_dtr = card->csd.max_dtr;
975
976 mmc_set_clock(card->host, max_dtr);
977}
978
979/*
980 * Select the bus width amoung 4-bit and 8-bit(SDR).
981 * If the bus width is changed successfully, return the selected width value.
982 * Zero is returned instead of error value if the wide width is not supported.
983 */
984static int mmc_select_bus_width(struct mmc_card *card)
a4924c71 985{
a4924c71 986 static unsigned ext_csd_bits[] = {
a4924c71 987 EXT_CSD_BUS_WIDTH_8,
577fb131 988 EXT_CSD_BUS_WIDTH_4,
a4924c71
G		 989 };
990 static unsigned bus_widths[] = {
a4924c71 991 MMC_BUS_WIDTH_8,
577fb131 992 MMC_BUS_WIDTH_4,
a4924c71 993 };
577fb131
SJ		 994 struct mmc_host *host = card->host;
995 unsigned idx, bus_width = 0;
996 int err = 0;
a4924c71 997
1c2d26e3 998 if (!mmc_can_ext_csd(card) ||
577fb131
SJ		 999 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1000 return 0;
a4924c71 1001
577fb131 1002 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
a4924c71
G		 1003
1004 /*
1005 * Unlike SD, MMC cards dont have a configuration register to notify
1006 * supported bus width. So bus test command should be run to identify
1007 * the supported bus width or compare the ext csd values of current
1008 * bus width and ext csd values of 1 bit mode read earlier.
1009 */
577fb131 1010 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
a4924c71
G		 1011 /*
1012 * Host is capable of 8bit transfer, then switch
1013 * the device to work in 8bit transfer mode. If the
1014 * mmc switch command returns error then switch to
1015 * 4bit transfer mode. On success set the corresponding
1016 * bus width on the host.
1017 */
1018 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1019 EXT_CSD_BUS_WIDTH,
1020 ext_csd_bits[idx],
1021 card->ext_csd.generic_cmd6_time);
1022 if (err)
1023 continue;
1024
577fb131
SJ		 1025 bus_width = bus_widths[idx];
1026 mmc_set_bus_width(host, bus_width);
a4924c71 1027
577fb131
SJ		 1028 /*
1029 * If controller can't handle bus width test,
1030 * compare ext_csd previously read in 1 bit mode
1031 * against ext_csd at new bus width
1032 */
a4924c71 1033 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
577fb131 1034 err = mmc_compare_ext_csds(card, bus_width);
a4924c71 1035 else
577fb131
SJ		 1036 err = mmc_bus_test(card, bus_width);
1037
1038 if (!err) {
1039 err = bus_width;
a4924c71 1040 break;
577fb131
SJ		 1041 } else {
1042 pr_warn("%s: switch to bus width %d failed\n",
ed9feec7 1043 mmc_hostname(host), 1 << bus_width);
577fb131 1044 }
a4924c71
G		 1045 }
1046
577fb131
SJ		 1047 return err;
1048}
1049
1050/*
1051 * Switch to the high-speed mode
1052 */
1053static int mmc_select_hs(struct mmc_card *card)
1054{
1055 int err;
1056
1057 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1058 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
53e60650
UH		 1059 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1060 true, true, true);
67d35960
JL		 1061 if (err)
1062 pr_warn("%s: switch to high-speed failed, err:%d\n",
1063 mmc_hostname(card->host), err);
1064
577fb131
SJ		 1065 return err;
1066}
1067
1068/*
1069 * Activate wide bus and DDR if supported.
1070 */
1071static int mmc_select_hs_ddr(struct mmc_card *card)
1072{
1073 struct mmc_host *host = card->host;
1074 u32 bus_width, ext_csd_bits;
1075 int err = 0;
1076
1077 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1078 return 0;
1079
1080 bus_width = host->ios.bus_width;
1081 if (bus_width == MMC_BUS_WIDTH_1)
1082 return 0;
1083
1084 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1085 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1086
e173f891
UH		 1087 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1088 EXT_CSD_BUS_WIDTH,
1089 ext_csd_bits,
1090 card->ext_csd.generic_cmd6_time,
1091 MMC_TIMING_MMC_DDR52,
1092 true, true, true);
577fb131 1093 if (err) {
4b75bffc 1094 pr_err("%s: switch to bus width %d ddr failed\n",
577fb131
SJ		 1095 mmc_hostname(host), 1 << bus_width);
1096 return err;
1097 }
1098
1099 /*
1100 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1101 * signaling.
1102 *
1103 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1104 *
1105 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1106 * in the JEDEC spec for DDR.
1107 *
312449ef
CD		 1108 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1109 * host controller can support this, like some of the SDHCI
1110 * controller which connect to an eMMC device. Some of these
1111 * host controller still needs to use 1.8v vccq for supporting
1112 * DDR mode.
1113 *
1114 * So the sequence will be:
1115 * if (host and device can both support 1.2v IO)
1116 * use 1.2v IO;
1117 * else if (host and device can both support 1.8v IO)
1118 * use 1.8v IO;
1119 * so if host and device can only support 3.3v IO, this is the
1120 * last choice.
577fb131
SJ		 1121 *
1122 * WARNING: eMMC rules are NOT the same as SD DDR
1123 */
20f921bb 1124 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
4e74b6b3 1125 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
20f921bb
UH		 1126 if (!err)
1127 return 0;
1128 }
577fb131 1129
20f921bb
UH		 1130 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1131 host->caps & MMC_CAP_1_8V_DDR)
4e74b6b3 1132 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
312449ef
CD		 1133
1134 /* make sure vccq is 3.3v after switching disaster */
1135 if (err)
4e74b6b3 1136 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
312449ef 1137
577fb131
SJ		 1138 return err;
1139}
1140
0a5b6438
SJ		 1141static int mmc_select_hs400(struct mmc_card *card)
1142{
1143 struct mmc_host *host = card->host;
51b12f77 1144 unsigned int max_dtr;
0a5b6438 1145 int err = 0;
cc4f414c 1146 u8 val;
0a5b6438
SJ		 1147
1148 /*
1149 * HS400 mode requires 8-bit bus width
1150 */
1151 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1152 host->ios.bus_width == MMC_BUS_WIDTH_8))
1153 return 0;
1154
51b12f77 1155 /* Switch card to HS mode */
adb24d42 1156 val = EXT_CSD_TIMING_HS;
0a5b6438 1157 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
cc4f414c 1158 EXT_CSD_HS_TIMING, val,
aa33ce3c 1159 card->ext_csd.generic_cmd6_time, 0,
08573eaf 1160 true, false, true);
0a5b6438 1161 if (err) {
4b75bffc 1162 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
0a5b6438
SJ		 1163 mmc_hostname(host), err);
1164 return err;
1165 }
1166
51b12f77
AH		 1167 /* Set host controller to HS timing */
1168 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1169
649c6059
ZX		 1170 /* Reduce frequency to HS frequency */
1171 max_dtr = card->ext_csd.hs_max_dtr;
1172 mmc_set_clock(host, max_dtr);
1173
08573eaf
CJ		 1174 err = mmc_switch_status(card);
1175 if (err)
1176 goto out_err;
d2302933
AH		 1177
1178 /* Switch card to DDR */
0a5b6438
SJ		 1179 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1180 EXT_CSD_BUS_WIDTH,
1181 EXT_CSD_DDR_BUS_WIDTH_8,
1182 card->ext_csd.generic_cmd6_time);
1183 if (err) {
4b75bffc 1184 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
0a5b6438
SJ		 1185 mmc_hostname(host), err);
1186 return err;
1187 }
1188
d2302933 1189 /* Switch card to HS400 */
cc4f414c
AH		 1190 val = EXT_CSD_TIMING_HS400 |
1191 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
0a5b6438 1192 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
cc4f414c 1193 EXT_CSD_HS_TIMING, val,
aa33ce3c 1194 card->ext_csd.generic_cmd6_time, 0,
08573eaf 1195 true, false, true);
0a5b6438 1196 if (err) {
4b75bffc 1197 pr_err("%s: switch to hs400 failed, err:%d\n",
0a5b6438
SJ		 1198 mmc_hostname(host), err);
1199 return err;
1200 }
1201
d2302933 1202 /* Set host controller to HS400 timing and frequency */
0a5b6438
SJ		 1203 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1204 mmc_set_bus_speed(card);
1205
08573eaf
CJ		 1206 err = mmc_switch_status(card);
1207 if (err)
1208 goto out_err;
d2302933 1209
0a5b6438 1210 return 0;
d2302933
AH		 1211
1212out_err:
1213 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1214 __func__, err);
1215 return err;
0a5b6438
SJ		 1216}
1217
6376f69d
AH		 1218int mmc_hs200_to_hs400(struct mmc_card *card)
1219{
1220 return mmc_select_hs400(card);
1221}
1222
6376f69d
AH		 1223int mmc_hs400_to_hs200(struct mmc_card *card)
1224{
1225 struct mmc_host *host = card->host;
6376f69d
AH		 1226 unsigned int max_dtr;
1227 int err;
cc4f414c 1228 u8 val;
6376f69d 1229
6376f69d
AH		 1230 /* Reduce frequency to HS */
1231 max_dtr = card->ext_csd.hs_max_dtr;
1232 mmc_set_clock(host, max_dtr);
1233
1234 /* Switch HS400 to HS DDR */
adb24d42 1235 val = EXT_CSD_TIMING_HS;
6376f69d 1236 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
aa33ce3c 1237 val, card->ext_csd.generic_cmd6_time, 0,
08573eaf 1238 true, false, true);
6376f69d
AH		 1239 if (err)
1240 goto out_err;
1241
1242 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1243
08573eaf
CJ		 1244 err = mmc_switch_status(card);
1245 if (err)
1246 goto out_err;
6376f69d
AH		 1247
1248 /* Switch HS DDR to HS */
1249 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1250 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
aa33ce3c 1251 0, true, false, true);
6376f69d
AH		 1252 if (err)
1253 goto out_err;
1254
1255 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1256
08573eaf
CJ		 1257 err = mmc_switch_status(card);
1258 if (err)
1259 goto out_err;
6376f69d
AH		 1260
1261 /* Switch HS to HS200 */
cc4f414c
AH		 1262 val = EXT_CSD_TIMING_HS200 |
1263 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
6376f69d 1264 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
aa33ce3c 1265 val, card->ext_csd.generic_cmd6_time, 0,
08573eaf 1266 true, false, true);
6376f69d
AH		 1267 if (err)
1268 goto out_err;
1269
1270 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1271
ef3d2322
AH		 1272 /*
1273 * For HS200, CRC errors are not a reliable way to know the switch
1274 * failed. If there really is a problem, we would expect tuning will
1275 * fail and the result ends up the same.
1276 */
1277 err = __mmc_switch_status(card, false);
08573eaf
CJ		 1278 if (err)
1279 goto out_err;
6376f69d
AH		 1280
1281 mmc_set_bus_speed(card);
1282
1283 return 0;
1284
1285out_err:
1286 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1287 __func__, err);
1288 return err;
1289}
1290
fb458864
CM		 1291static void mmc_select_driver_type(struct mmc_card *card)
1292{
1293 int card_drv_type, drive_strength, drv_type;
6186d06c 1294 int fixed_drv_type = card->host->fixed_drv_type;
fb458864
CM		 1295
1296 card_drv_type = card->ext_csd.raw_driver_strength |
1297 mmc_driver_type_mask(0);
1298
6186d06c
WS		 1299 if (fixed_drv_type >= 0)
1300 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1301 ? fixed_drv_type : 0;
1302 else
1303 drive_strength = mmc_select_drive_strength(card,
1304 card->ext_csd.hs200_max_dtr,
1305 card_drv_type, &drv_type);
fb458864
CM		 1306
1307 card->drive_strength = drive_strength;
1308
1309 if (drv_type)
1310 mmc_set_driver_type(card->host, drv_type);
1311}
1312
81ac2af6
SL		 1313static int mmc_select_hs400es(struct mmc_card *card)
1314{
1315 struct mmc_host *host = card->host;
92ddd959 1316 int err = -EINVAL;
81ac2af6
SL		 1317 u8 val;
1318
1319 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1320 err = -ENOTSUPP;
1321 goto out_err;
1322 }
1323
1720d354 1324 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
4e74b6b3 1325 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1720d354
SL		 1326
1327 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
4e74b6b3 1328 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1720d354
SL		 1329
1330 /* If fails try again during next card power cycle */
1331 if (err)
1332 goto out_err;
1333
81ac2af6
SL		 1334 err = mmc_select_bus_width(card);
1335 if (err < 0)
1336 goto out_err;
1337
1338 /* Switch card to HS mode */
53e60650
UH		 1339 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1340 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1341 card->ext_csd.generic_cmd6_time, 0,
1342 true, false, true);
1343 if (err) {
1344 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1345 mmc_hostname(host), err);
81ac2af6 1346 goto out_err;
53e60650 1347 }
81ac2af6 1348
53e60650 1349 mmc_set_timing(host, MMC_TIMING_MMC_HS);
81ac2af6
SL		 1350 err = mmc_switch_status(card);
1351 if (err)
1352 goto out_err;
1353
53e60650
UH		 1354 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1355
81ac2af6
SL		 1356 /* Switch card to DDR with strobe bit */
1357 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1358 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1359 EXT_CSD_BUS_WIDTH,
1360 val,
1361 card->ext_csd.generic_cmd6_time);
1362 if (err) {
1363 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1364 mmc_hostname(host), err);
1365 goto out_err;
1366 }
1367
fb458864
CM		 1368 mmc_select_driver_type(card);
1369
81ac2af6
SL		 1370 /* Switch card to HS400 */
1371 val = EXT_CSD_TIMING_HS400 |
1372 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1373 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1374 EXT_CSD_HS_TIMING, val,
aa33ce3c 1375 card->ext_csd.generic_cmd6_time, 0,
81ac2af6
SL		 1376 true, false, true);
1377 if (err) {
1378 pr_err("%s: switch to hs400es failed, err:%d\n",
1379 mmc_hostname(host), err);
1380 goto out_err;
1381 }
1382
1383 /* Set host controller to HS400 timing and frequency */
1384 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1385
1386 /* Controller enable enhanced strobe function */
1387 host->ios.enhanced_strobe = true;
1388 if (host->ops->hs400_enhanced_strobe)
1389 host->ops->hs400_enhanced_strobe(host, &host->ios);
1390
1391 err = mmc_switch_status(card);
1392 if (err)
1393 goto out_err;
1394
1395 return 0;
1396
1397out_err:
1398 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1399 __func__, err);
1400 return err;
1401}
1402
577fb131
SJ		 1403/*
1404 * For device supporting HS200 mode, the following sequence
1405 * should be done before executing the tuning process.
1406 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1407 * 2. switch to HS200 mode
1408 * 3. set the clock to > 52Mhz and <=200MHz
1409 */
1410static int mmc_select_hs200(struct mmc_card *card)
1411{
1412 struct mmc_host *host = card->host;
e51534c8 1413 unsigned int old_timing, old_signal_voltage;
577fb131 1414 int err = -EINVAL;
cc4f414c 1415 u8 val;
577fb131 1416
e51534c8 1417 old_signal_voltage = host->ios.signal_voltage;
577fb131 1418 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
4e74b6b3 1419 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
577fb131
SJ		 1420
1421 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
4e74b6b3 1422 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
577fb131
SJ		 1423
1424 /* If fails try again during next card power cycle */
1425 if (err)
e51534c8 1426 return err;
577fb131 1427
cc4f414c
AH		 1428 mmc_select_driver_type(card);
1429
577fb131
SJ		 1430 /*
1431 * Set the bus width(4 or 8) with host's support and
1432 * switch to HS200 mode if bus width is set successfully.
1433 */
1434 err = mmc_select_bus_width(card);
8b7be8f2 1435 if (err > 0) {
cc4f414c
AH		 1436 val = EXT_CSD_TIMING_HS200 |
1437 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
4509f847 1438 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
cc4f414c 1439 EXT_CSD_HS_TIMING, val,
aa33ce3c 1440 card->ext_csd.generic_cmd6_time, 0,
08573eaf 1441 true, false, true);
1815e61b
AH		 1442 if (err)
1443 goto err;
1444 old_timing = host->ios.timing;
1445 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
08573eaf 1446
ef3d2322
AH		 1447 /*
1448 * For HS200, CRC errors are not a reliable way to know the
1449 * switch failed. If there really is a problem, we would expect
1450 * tuning will fail and the result ends up the same.
1451 */
1452 err = __mmc_switch_status(card, false);
1453
08573eaf
CJ		 1454 /*
1455 * mmc_select_timing() assumes timing has not changed if
1456 * it is a switch error.
1457 */
1458 if (err == -EBADMSG)
1459 mmc_set_timing(host, old_timing);
577fb131 1460 }
a4924c71 1461err:
e51534c8
DA		 1462 if (err) {
1463 /* fall back to the old signal voltage, if fails report error */
4e74b6b3 1464 if (mmc_set_signal_voltage(host, old_signal_voltage))
e51534c8
DA		 1465 err = -EIO;
1466
1815e61b
AH		 1467 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1468 __func__, err);
e51534c8 1469 }
a4924c71
G		 1470 return err;
1471}
1472
577fb131 1473/*
81ac2af6 1474 * Activate High Speed, HS200 or HS400ES mode if supported.
577fb131
SJ		 1475 */
1476static int mmc_select_timing(struct mmc_card *card)
1477{
1478 int err = 0;
1479
148bcab2 1480 if (!mmc_can_ext_csd(card))
577fb131
SJ		 1481 goto bus_speed;
1482
81ac2af6
SL		 1483 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1484 err = mmc_select_hs400es(card);
1485 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
577fb131
SJ		 1486 err = mmc_select_hs200(card);
1487 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1488 err = mmc_select_hs(card);
1489
1490 if (err && err != -EBADMSG)
1491 return err;
1492
577fb131
SJ		 1493bus_speed:
1494 /*
1495 * Set the bus speed to the selected bus timing.
1496 * If timing is not selected, backward compatible is the default.
1497 */
1498 mmc_set_bus_speed(card);
0400ed0a 1499 return 0;
577fb131
SJ		 1500}
1501
1502/*
1503 * Execute tuning sequence to seek the proper bus operating
0a5b6438 1504 * conditions for HS200 and HS400, which sends CMD21 to the device.
577fb131
SJ		 1505 */
1506static int mmc_hs200_tuning(struct mmc_card *card)
1507{
1508 struct mmc_host *host = card->host;
577fb131 1509
0a5b6438
SJ		 1510 /*
1511 * Timing should be adjusted to the HS400 target
1512 * operation frequency for tuning process
1513 */
1514 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1515 host->ios.bus_width == MMC_BUS_WIDTH_8)
1516 if (host->ops->prepare_hs400_tuning)
1517 host->ops->prepare_hs400_tuning(host, &host->ios);
1518
63e415c6 1519 return mmc_execute_tuning(card);
577fb131
SJ		 1520}
1521
7ea239d9 1522/*
6abaa0c9
PO		 1523 * Handle the detection and initialisation of a card.
1524 *
8769392b 1525 * In the case of a resume, "oldcard" will contain the card
6abaa0c9 1526 * we're trying to reinitialise.
7ea239d9 1527 */
8c75deae 1528static int mmc_init_card(struct mmc_host *host, u32 ocr,
6abaa0c9 1529 struct mmc_card *oldcard)
7ea239d9
PO		 1530{
1531 struct mmc_card *card;
577fb131 1532 int err;
7ea239d9 1533 u32 cid[4];
b676f039 1534 u32 rocr;
7ea239d9 1535
d84075c8 1536 WARN_ON(!host->claimed);
7ea239d9 1537
44669034
SNX		 1538 /* Set correct bus mode for MMC before attempting init */
1539 if (!mmc_host_is_spi(host))
1540 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1541
7ea239d9
PO		 1542 /*
1543 * Since we're changing the OCR value, we seem to
1544 * need to tell some cards to go back to the idle
1545 * state. We wait 1ms to give cards time to
1546 * respond.
c3805467 1547 * mmc_go_idle is needed for eMMC that are asleep
7ea239d9
PO		 1548 */
1549 mmc_go_idle(host);
1550
1551 /* The extra bit indicates that we support high capacity */
b676f039 1552 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
17b0429d 1553 if (err)
6abaa0c9 1554 goto err;
7ea239d9 1555
af517150
DB		 1556 /*
1557 * For SPI, enable CRC as appropriate.
1558 */
1559 if (mmc_host_is_spi(host)) {
1560 err = mmc_spi_set_crc(host, use_spi_crc);
1561 if (err)
1562 goto err;
1563 }
1564
7ea239d9
PO		 1565 /*
1566 * Fetch CID from card.
1567 */
a1473732 1568 err = mmc_send_cid(host, cid);
17b0429d 1569 if (err)
7ea239d9
PO		 1570 goto err;
1571
6abaa0c9 1572 if (oldcard) {
adf66a0d
PO		 1573 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1574 err = -ENOENT;
6abaa0c9 1575 goto err;
adf66a0d 1576 }
6abaa0c9
PO		 1577
1578 card = oldcard;
1579 } else {
1580 /*
1581 * Allocate card structure.
1582 */
51ec92e2 1583 card = mmc_alloc_card(host, &mmc_type);
adf66a0d
PO		 1584 if (IS_ERR(card)) {
1585 err = PTR_ERR(card);
6abaa0c9 1586 goto err;
adf66a0d 1587 }
7ea239d9 1588
69041150 1589 card->ocr = ocr;
6abaa0c9
PO		 1590 card->type = MMC_TYPE_MMC;
1591 card->rca = 1;
1592 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1593 }
7ea239d9 1594
eac86321
DA		 1595 /*
1596 * Call the optional HC's init_card function to handle quirks.
1597 */
1598 if (host->ops->init_card)
1599 host->ops->init_card(host, card);
1600
7ea239d9 1601 /*
af517150 1602 * For native busses: set card RCA and quit open drain mode.
7ea239d9 1603 */
af517150
DB		 1604 if (!mmc_host_is_spi(host)) {
1605 err = mmc_set_relative_addr(card);
1606 if (err)
1607 goto free_card;
7ea239d9 1608
af517150
DB		 1609 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1610 }
7ea239d9 1611
6abaa0c9
PO		 1612 if (!oldcard) {
1613 /*
1614 * Fetch CSD from card.
1615 */
1616 err = mmc_send_csd(card, card->raw_csd);
17b0429d 1617 if (err)
6abaa0c9 1618 goto free_card;
7ea239d9 1619
bd766312 1620 err = mmc_decode_csd(card);
adf66a0d 1621 if (err)
bd766312
PO		 1622 goto free_card;
1623 err = mmc_decode_cid(card);
adf66a0d 1624 if (err)
bd766312 1625 goto free_card;
6abaa0c9 1626 }
7ea239d9 1627
3d705d14
SH		 1628 /*
1629 * handling only for cards supporting DSR and hosts requesting
1630 * DSR configuration
1631 */
1632 if (card->csd.dsr_imp && host->dsr_req)
1633 mmc_set_dsr(host);
1634
7ea239d9 1635 /*
89a73cf5 1636 * Select card, as all following commands rely on that.
7ea239d9 1637 */
af517150
DB		 1638 if (!mmc_host_is_spi(host)) {
1639 err = mmc_select_card(card);
1640 if (err)
1641 goto free_card;
1642 }
7ea239d9 1643
6abaa0c9 1644 if (!oldcard) {
076ec38a
UH		 1645 /* Read extended CSD. */
1646 err = mmc_read_ext_csd(card);
17b0429d 1647 if (err)
6abaa0c9 1648 goto free_card;
b676f039 1649
87e88659
MY		 1650 /*
1651 * If doing byte addressing, check if required to do sector
b676f039
PR		 1652 * addressing. Handle the case of <2GB cards needing sector
1653 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1654 * ocr register has bit 30 set for sector addressing.
1655 */
87e88659 1656 if (rocr & BIT(30))
b676f039
PR		 1657 mmc_card_set_blockaddr(card);
1658
dfe86cba
AH		 1659 /* Erase size depends on CSD and Extended CSD */
1660 mmc_set_erase_size(card);
6abaa0c9 1661 }
7ea239d9 1662
d2a47176
UH		 1663 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1664 if (card->ext_csd.rev >= 3) {
709de99d 1665 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
b23cf0bd
SJ		 1666 EXT_CSD_ERASE_GROUP_DEF, 1,
1667 card->ext_csd.generic_cmd6_time);
709de99d
CD		 1668
1669 if (err && err != -EBADMSG)
1670 goto free_card;
1671
1672 if (err) {
1673 err = 0;
1674 /*
1675 * Just disable enhanced area off & sz
1676 * will try to enable ERASE_GROUP_DEF
1677 * during next time reinit
1678 */
1679 card->ext_csd.enhanced_area_offset = -EINVAL;
1680 card->ext_csd.enhanced_area_size = -EINVAL;
1681 } else {
1682 card->ext_csd.erase_group_def = 1;
1683 /*
1684 * enable ERASE_GRP_DEF successfully.
1685 * This will affect the erase size, so
1686 * here need to reset erase size
1687 */
1688 mmc_set_erase_size(card);
1689 }
1690 }
1691
41e2a489
PR		 1692 /*
1693 * Ensure eMMC user default partition is enabled
1694 */
371a689f
AW		 1695 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1696 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1697 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1698 card->ext_csd.part_config,
1699 card->ext_csd.part_time);
1700 if (err && err != -EBADMSG)
1701 goto free_card;
41e2a489
PR		 1702 }
1703
bec8726a 1704 /*
43235679 1705 * Enable power_off_notification byte in the ext_csd register
bec8726a 1706 */
43235679 1707 if (card->ext_csd.rev >= 6) {
bec8726a
G		 1708 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1709 EXT_CSD_POWER_OFF_NOTIFICATION,
1710 EXT_CSD_POWER_ON,
1711 card->ext_csd.generic_cmd6_time);
1712 if (err && err != -EBADMSG)
1713 goto free_card;
bec8726a 1714
96a85d54
G		 1715 /*
1716 * The err can be -EBADMSG or 0,
1717 * so check for success and update the flag
1718 */
1719 if (!err)
e6c08586 1720 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
96a85d54 1721 }
bec8726a 1722
89a73cf5 1723 /*
577fb131 1724 * Select timing interface
dfc13e84 1725 */
577fb131
SJ		 1726 err = mmc_select_timing(card);
1727 if (err)
1728 goto free_card;
dfc13e84 1729
a4924c71 1730 if (mmc_card_hs200(card)) {
577fb131
SJ		 1731 err = mmc_hs200_tuning(card);
1732 if (err)
4b75bffc 1733 goto free_card;
0a5b6438
SJ		 1734
1735 err = mmc_select_hs400(card);
1736 if (err)
4b75bffc 1737 goto free_card;
773dc118 1738 } else if (!mmc_card_hs400es(card)) {
577fb131
SJ		 1739 /* Select the desired bus width optionally */
1740 err = mmc_select_bus_width(card);
3d4ef329 1741 if (err > 0 && mmc_card_hs(card)) {
577fb131
SJ		 1742 err = mmc_select_hs_ddr(card);
1743 if (err)
4b75bffc 1744 goto free_card;
ef0b27d4 1745 }
89a73cf5
PO		 1746 }
1747
2385049d
SJ		 1748 /*
1749 * Choose the power class with selected bus interface
1750 */
1751 mmc_select_powerclass(card);
1752
52d0974e
SJ		 1753 /*
1754 * Enable HPI feature (if supported)
1755 */
1756 if (card->ext_csd.hpi) {
1757 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1758 EXT_CSD_HPI_MGMT, 1,
1759 card->ext_csd.generic_cmd6_time);
1760 if (err && err != -EBADMSG)
1761 goto free_card;
1762 if (err) {
6606110d
JP		 1763 pr_warn("%s: Enabling HPI failed\n",
1764 mmc_hostname(card->host));
52d0974e
SJ		 1765 err = 0;
1766 } else
1767 card->ext_csd.hpi_en = 1;
1768 }
1769
881d1c25
SJ		 1770 /*
1771 * If cache size is higher than 0, this indicates
1772 * the existence of cache and it can be turned on.
1773 */
5320226a
P		 1774 if (!mmc_card_broken_hpi(card) &&
1775 card->ext_csd.cache_size > 0) {
881d1c25 1776 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
8bc0678b
SJ		 1777 EXT_CSD_CACHE_CTRL, 1,
1778 card->ext_csd.generic_cmd6_time);
881d1c25
SJ		 1779 if (err && err != -EBADMSG)
1780 goto free_card;
1781
1782 /*
1783 * Only if no error, cache is turned on successfully.
1784 */
8bc0678b 1785 if (err) {
6606110d
JP		 1786 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1787 mmc_hostname(card->host), err);
8bc0678b
SJ		 1788 card->ext_csd.cache_ctrl = 0;
1789 err = 0;
1790 } else {
1791 card->ext_csd.cache_ctrl = 1;
1792 }
881d1c25
SJ		 1793 }
1794
98d4f780
AH		 1795 /*
1796 * Enable Command Queue if supported. Note that Packed Commands cannot
1797 * be used with Command Queue.
1798 */
1799 card->ext_csd.cmdq_en = false;
1800 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1801 err = mmc_cmdq_enable(card);
1802 if (err && err != -EBADMSG)
1803 goto free_card;
1804 if (err) {
1805 pr_warn("%s: Enabling CMDQ failed\n",
1806 mmc_hostname(card->host));
1807 card->ext_csd.cmdq_support = false;
1808 card->ext_csd.cmdq_depth = 0;
1809 err = 0;
1810 }
1811 }
9d4579a8
AH		 1812 /*
1813 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1814 * disabled for a time, so a flag is needed to indicate to re-enable the
1815 * Command Queue.
1816 */
1817 card->reenable_cmdq = card->ext_csd.cmdq_en;
1818
f690f440
AH		 1819 if (card->ext_csd.cmdq_en && !host->cqe_enabled) {
1820 err = host->cqe_ops->cqe_enable(host, card);
1821 if (err) {
1822 pr_err("%s: Failed to enable CQE, error %d\n",
1823 mmc_hostname(host), err);
1824 } else {
1825 host->cqe_enabled = true;
1826 pr_info("%s: Command Queue Engine enabled\n",
1827 mmc_hostname(host));
1828 }
1829 }
1830
6abaa0c9
PO		 1831 if (!oldcard)
1832 host->card = card;
1833
17b0429d 1834 return 0;
6abaa0c9
PO		 1835
1836free_card:
1837 if (!oldcard)
1838 mmc_remove_card(card);
1839err:
adf66a0d 1840 return err;
6abaa0c9
PO		 1841}
1842
07a68216
UH		 1843static int mmc_can_sleep(struct mmc_card *card)
1844{
1845 return (card && card->ext_csd.rev >= 3);
1846}
1847
1848static int mmc_sleep(struct mmc_host *host)
1849{
c7836d15 1850 struct mmc_command cmd = {};
07a68216 1851 struct mmc_card *card = host->card;
cb962e04 1852 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
07a68216
UH		 1853 int err;
1854
436f8daa
AH		 1855 /* Re-tuning can't be done once the card is deselected */
1856 mmc_retune_hold(host);
1857
07a68216
UH		 1858 err = mmc_deselect_cards(host);
1859 if (err)
436f8daa 1860 goto out_release;
07a68216
UH		 1861
1862 cmd.opcode = MMC_SLEEP_AWAKE;
1863 cmd.arg = card->rca << 16;
1864 cmd.arg |= 1 << 15;
1865
cb962e04
UH		 1866 /*
1867 * If the max_busy_timeout of the host is specified, validate it against
1868 * the sleep cmd timeout. A failure means we need to prevent the host
1869 * from doing hw busy detection, which is done by converting to a R1
1870 * response instead of a R1B.
1871 */
1872 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1873 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1874 } else {
1875 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1876 cmd.busy_timeout = timeout_ms;
1877 }
1878
07a68216
UH		 1879 err = mmc_wait_for_cmd(host, &cmd, 0);
1880 if (err)
436f8daa 1881 goto out_release;
07a68216
UH		 1882
1883 /*
1884 * If the host does not wait while the card signals busy, then we will
1885 * will have to wait the sleep/awake timeout. Note, we cannot use the
1886 * SEND_STATUS command to poll the status because that command (and most
1887 * others) is invalid while the card sleeps.
1888 */
cb962e04
UH		 1889 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1890 mmc_delay(timeout_ms);
07a68216 1891
436f8daa
AH		 1892out_release:
1893 mmc_retune_release(host);
07a68216
UH		 1894 return err;
1895}
1896
e6c08586
UH		 1897static int mmc_can_poweroff_notify(const struct mmc_card *card)
1898{
1899 return card &&
1900 mmc_card_mmc(card) &&
1901 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1902}
1903
1904static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1905{
1906 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1907 int err;
1908
1909 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1910 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1911 timeout = card->ext_csd.power_off_longtime;
1912
878e200b
UH		 1913 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1914 EXT_CSD_POWER_OFF_NOTIFICATION,
aa33ce3c 1915 notify_type, timeout, 0, true, false, false);
e6c08586
UH		 1916 if (err)
1917 pr_err("%s: Power Off Notification timed out, %u\n",
1918 mmc_hostname(card->host), timeout);
1919
1920 /* Disable the power off notification after the switch operation. */
1921 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1922
1923 return err;
1924}
1925
6abaa0c9
PO		 1926/*
1927 * Host is being removed. Free up the current card.
1928 */
1929static void mmc_remove(struct mmc_host *host)
1930{
6abaa0c9
PO		 1931 mmc_remove_card(host->card);
1932 host->card = NULL;
1933}
1934
d3049504
AH		 1935/*
1936 * Card detection - card is alive.
1937 */
1938static int mmc_alive(struct mmc_host *host)
1939{
1940 return mmc_send_status(host->card, NULL);
1941}
1942
6abaa0c9
PO		 1943/*
1944 * Card detection callback from host.
1945 */
1946static void mmc_detect(struct mmc_host *host)
1947{
1948 int err;
1949
6c0cedd1 1950 mmc_get_card(host->card, NULL);
6abaa0c9
PO		 1951
1952 /*
1953 * Just check if our card has been removed.
1954 */
d3049504 1955 err = _mmc_detect_card_removed(host);
6abaa0c9 1956
6c0cedd1 1957 mmc_put_card(host->card, NULL);
6abaa0c9 1958
17b0429d 1959 if (err) {
4101c16a 1960 mmc_remove(host);
6abaa0c9
PO		 1961
1962 mmc_claim_host(host);
1963 mmc_detach_bus(host);
7f7e4129 1964 mmc_power_off(host);
6abaa0c9
PO		 1965 mmc_release_host(host);
1966 }
1967}
1968
03d071fc 1969static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
6abaa0c9 1970{
c3805467 1971 int err = 0;
03d071fc
UH		 1972 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1973 EXT_CSD_POWER_OFF_LONG;
c3805467 1974
6abaa0c9 1975 mmc_claim_host(host);
881d926d 1976
9ec775f7
UH		 1977 if (mmc_card_suspended(host->card))
1978 goto out;
1979
39b9431b
UH		 1980 if (mmc_card_doing_bkops(host->card)) {
1981 err = mmc_stop_bkops(host->card);
1982 if (err)
1983 goto out;
1984 }
1985
10e5d965 1986 err = mmc_flush_cache(host->card);
881d926d
ME		 1987 if (err)
1988 goto out;
1989
43235679 1990 if (mmc_can_poweroff_notify(host->card) &&
53275c21 1991 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
03d071fc 1992 err = mmc_poweroff_notify(host->card, notify_type);
07a68216
UH		 1993 else if (mmc_can_sleep(host->card))
1994 err = mmc_sleep(host);
e6c08586 1995 else if (!mmc_host_is_spi(host))
85e727ed 1996 err = mmc_deselect_cards(host);
95cdfb72 1997
9ec775f7 1998 if (!err) {
74590263 1999 mmc_power_off(host);
9ec775f7
UH		 2000 mmc_card_set_suspended(host->card);
2001 }
881d926d
ME		 2002out:
2003 mmc_release_host(host);
c3805467 2004 return err;
6abaa0c9 2005}
7ea239d9 2006
03d071fc 2007/*
0cb403a2 2008 * Suspend callback
03d071fc
UH		 2009 */
2010static int mmc_suspend(struct mmc_host *host)
2011{
0cb403a2
UH		 2012 int err;
2013
2014 err = _mmc_suspend(host, true);
2015 if (!err) {
2016 pm_runtime_disable(&host->card->dev);
2017 pm_runtime_set_suspended(&host->card->dev);
2018 }
2019
2020 return err;
03d071fc
UH		 2021}
2022
6abaa0c9 2023/*
6abaa0c9
PO		 2024 * This function tries to determine if the same card is still present
2025 * and, if so, restore all state to it.
2026 */
0cb403a2 2027static int _mmc_resume(struct mmc_host *host)
6abaa0c9 2028{
9ec775f7 2029 int err = 0;
6abaa0c9 2030
6abaa0c9 2031 mmc_claim_host(host);
9ec775f7
UH		 2032
2033 if (!mmc_card_suspended(host->card))
2034 goto out;
2035
69041150 2036 mmc_power_up(host, host->card->ocr);
69041150 2037 err = mmc_init_card(host, host->card->ocr, host->card);
9ec775f7 2038 mmc_card_clr_suspended(host->card);
2986d0bf 2039
9ec775f7
UH		 2040out:
2041 mmc_release_host(host);
95cdfb72 2042 return err;
6abaa0c9
PO		 2043}
2044
9ec775f7
UH		 2045/*
2046 * Shutdown callback
2047 */
2048static int mmc_shutdown(struct mmc_host *host)
2049{
2050 int err = 0;
2051
2052 /*
2053 * In a specific case for poweroff notify, we need to resume the card
2054 * before we can shutdown it properly.
2055 */
2056 if (mmc_can_poweroff_notify(host->card) &&
2057 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
0cb403a2 2058 err = _mmc_resume(host);
9ec775f7
UH		 2059
2060 if (!err)
2061 err = _mmc_suspend(host, false);
2062
2063 return err;
2064}
c4d770d7 2065
0cb403a2
UH		 2066/*
2067 * Callback for resume.
2068 */
2069static int mmc_resume(struct mmc_host *host)
2070{
0cb403a2 2071 pm_runtime_enable(&host->card->dev);
c29536e8 2072 return 0;
0cb403a2
UH		 2073}
2074
c4d770d7
UH		 2075/*
2076 * Callback for runtime_suspend.
2077 */
2078static int mmc_runtime_suspend(struct mmc_host *host)
2079{
2080 int err;
2081
2082 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2083 return 0;
2084
0cb403a2 2085 err = _mmc_suspend(host, true);
0cc81a8c 2086 if (err)
f42cf8d6 2087 pr_err("%s: error %d doing aggressive suspend\n",
c4d770d7 2088 mmc_hostname(host), err);
c4d770d7 2089
c4d770d7
UH		 2090 return err;
2091}
2092
2093/*
2094 * Callback for runtime_resume.
2095 */
2096static int mmc_runtime_resume(struct mmc_host *host)
2097{
2098 int err;
2099
0cb403a2 2100 err = _mmc_resume(host);
520322d9 2101 if (err && err != -ENOMEDIUM)
c29536e8 2102 pr_err("%s: error %d doing runtime resume\n",
c4d770d7
UH		 2103 mmc_hostname(host), err);
2104
c4d770d7
UH		 2105 return 0;
2106}
2107
88bed3a6 2108static int mmc_can_reset(struct mmc_card *card)
f855a371
JR		 2109{
2110 u8 rst_n_function;
2111
2112 rst_n_function = card->ext_csd.rst_n_function;
2113 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2114 return 0;
2115 return 1;
2116}
f855a371
JR		 2117
2118static int mmc_reset(struct mmc_host *host)
2119{
2120 struct mmc_card *card = host->card;
f855a371 2121
437db4c6
AH		 2122 /*
2123 * In the case of recovery, we can't expect flushing the cache to work
2124 * always, but we have a go and ignore errors.
2125 */
2126 mmc_flush_cache(host->card);
2127
4e6c7178
GG		 2128 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2129 mmc_can_reset(card)) {
2130 /* If the card accept RST_n signal, send it. */
2131 mmc_set_clock(host, host->f_init);
2132 host->ops->hw_reset(host);
2133 /* Set initial state and call mmc_set_ios */
2134 mmc_set_initial_state(host);
2135 } else {
2136 /* Do a brute force power cycle */
2137 mmc_power_cycle(host, card->ocr);
52c8212d 2138 mmc_pwrseq_reset(host);
4e6c7178 2139 }
364549dd 2140 return mmc_init_card(host, card->ocr, card);
f855a371
JR		 2141}
2142
6abaa0c9
PO		 2143static const struct mmc_bus_ops mmc_ops = {
2144 .remove = mmc_remove,
2145 .detect = mmc_detect,
2146 .suspend = mmc_suspend,
2147 .resume = mmc_resume,
c4d770d7
UH		 2148 .runtime_suspend = mmc_runtime_suspend,
2149 .runtime_resume = mmc_runtime_resume,
d3049504 2150 .alive = mmc_alive,
486fdbbc 2151 .shutdown = mmc_shutdown,
f855a371 2152 .reset = mmc_reset,
6abaa0c9
PO		 2153};
2154
2155/*
2156 * Starting point for MMC card init.
2157 */
807e8e40 2158int mmc_attach_mmc(struct mmc_host *host)
6abaa0c9
PO		 2159{
2160 int err;
69041150 2161 u32 ocr, rocr;
6abaa0c9 2162
d84075c8 2163 WARN_ON(!host->claimed);
6abaa0c9 2164
44669034
SNX		 2165 /* Set correct bus mode for MMC before attempting attach */
2166 if (!mmc_host_is_spi(host))
2167 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2168
807e8e40
AR		 2169 err = mmc_send_op_cond(host, 0, &ocr);
2170 if (err)
2171 return err;
2172
2501c917 2173 mmc_attach_bus(host, &mmc_ops);
8f230f45
TI		 2174 if (host->ocr_avail_mmc)
2175 host->ocr_avail = host->ocr_avail_mmc;
6abaa0c9 2176
af517150
DB		 2177 /*
2178 * We need to get OCR a different way for SPI.
2179 */
2180 if (mmc_host_is_spi(host)) {
2181 err = mmc_spi_read_ocr(host, 1, &ocr);
2182 if (err)
2183 goto err;
2184 }
2185
69041150 2186 rocr = mmc_select_voltage(host, ocr);
6abaa0c9
PO		 2187
2188 /*
2189 * Can we support the voltage of the card?
2190 */
69041150 2191 if (!rocr) {
109b5bed 2192 err = -EINVAL;
6abaa0c9 2193 goto err;
109b5bed 2194 }
6abaa0c9
PO		 2195
2196 /*
2197 * Detect and init the card.
2198 */
69041150 2199 err = mmc_init_card(host, rocr, NULL);
17b0429d 2200 if (err)
6abaa0c9
PO		 2201 goto err;
2202
2203 mmc_release_host(host);
4101c16a 2204 err = mmc_add_card(host->card);
7ea239d9 2205 if (err)
2986d0bf 2206 goto remove_card;
7ea239d9 2207
2860d060 2208 mmc_claim_host(host);
7ea239d9
PO		 2209 return 0;
2210
2986d0bf 2211remove_card:
6abaa0c9 2212 mmc_remove_card(host->card);
2986d0bf 2213 mmc_claim_host(host);
807e8e40 2214 host->card = NULL;
7ea239d9
PO		 2215err:
2216 mmc_detach_bus(host);
7ea239d9 2217
a3c76eb9 2218 pr_err("%s: error %d whilst initialising MMC card\n",
109b5bed
PO		 2219 mmc_hostname(host), err);
2220
adf66a0d 2221 return err;
7ea239d9 2222}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git