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