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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 "card.h"
25#include "host.h"
26#include "bus.h"
27#include "mmc_ops.h"
28#include "quirks.h"
29#include "sd_ops.h"
30#include "pwrseq.h"
31
32#define DEFAULT_CMD6_TIMEOUT_MS 500
33#define MIN_CACHE_EN_TIMEOUT_MS 1600
34
35static const unsigned int tran_exp[] = {
36 10000, 100000, 1000000, 10000000,
37 0, 0, 0, 0
38};
39
40static const unsigned char tran_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
43};
44
45static const unsigned int taac_exp[] = {
46 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
47};
48
49static const unsigned int taac_mant[] = {
50 0, 10, 12, 13, 15, 20, 25, 30,
51 35, 40, 45, 50, 55, 60, 70, 80,
52};
53
54#define UNSTUFF_BITS(resp,start,size) \
55 ({ \
56 const int __size = size; \
57 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
58 const int __off = 3 - ((start) / 32); \
59 const int __shft = (start) & 31; \
60 u32 __res; \
61 \
62 __res = resp[__off] >> __shft; \
63 if (__size + __shft > 32) \
64 __res |= resp[__off-1] << ((32 - __shft) % 32); \
65 __res & __mask; \
66 })
67
68
69
70
71static int mmc_decode_cid(struct mmc_card *card)
72{
73 u32 *resp = card->raw_cid;
74
75
76
77
78
79 switch (card->csd.mmca_vsn) {
80 case 0:
81 case 1:
82 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
83 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
84 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
85 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
86 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
87 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
88 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
89 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
90 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
91 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
92 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
93 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
94 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
95 break;
96
97 case 2:
98 case 3:
99 case 4:
100 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
101 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
102 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
103 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
104 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
105 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
106 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
107 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
108 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
109 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
110 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
111 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
112 break;
113
114 default:
115 pr_err("%s: card has unknown MMCA version %d\n",
116 mmc_hostname(card->host), card->csd.mmca_vsn);
117 return -EINVAL;
118 }
119
120 return 0;
121}
122
123static void mmc_set_erase_size(struct mmc_card *card)
124{
125 if (card->ext_csd.erase_group_def & 1)
126 card->erase_size = card->ext_csd.hc_erase_size;
127 else
128 card->erase_size = card->csd.erase_size;
129
130 mmc_init_erase(card);
131}
132
133
134
135
136static int mmc_decode_csd(struct mmc_card *card)
137{
138 struct mmc_csd *csd = &card->csd;
139 unsigned int e, m, a, b;
140 u32 *resp = card->raw_csd;
141
142
143
144
145
146
147 csd->structure = UNSTUFF_BITS(resp, 126, 2);
148 if (csd->structure == 0) {
149 pr_err("%s: unrecognised CSD structure version %d\n",
150 mmc_hostname(card->host), csd->structure);
151 return -EINVAL;
152 }
153
154 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
155 m = UNSTUFF_BITS(resp, 115, 4);
156 e = UNSTUFF_BITS(resp, 112, 3);
157 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
158 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
159
160 m = UNSTUFF_BITS(resp, 99, 4);
161 e = UNSTUFF_BITS(resp, 96, 3);
162 csd->max_dtr = tran_exp[e] * tran_mant[m];
163 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
164
165 e = UNSTUFF_BITS(resp, 47, 3);
166 m = UNSTUFF_BITS(resp, 62, 12);
167 csd->capacity = (1 + m) << (e + 2);
168
169 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
170 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
171 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
172 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
173 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
174 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
175 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
176 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
177
178 if (csd->write_blkbits >= 9) {
179 a = UNSTUFF_BITS(resp, 42, 5);
180 b = UNSTUFF_BITS(resp, 37, 5);
181 csd->erase_size = (a + 1) * (b + 1);
182 csd->erase_size <<= csd->write_blkbits - 9;
183 }
184
185 return 0;
186}
187
188static void mmc_select_card_type(struct mmc_card *card)
189{
190 struct mmc_host *host = card->host;
191 u8 card_type = card->ext_csd.raw_card_type;
192 u32 caps = host->caps, caps2 = host->caps2;
193 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
194 unsigned int avail_type = 0;
195
196 if (caps & MMC_CAP_MMC_HIGHSPEED &&
197 card_type & EXT_CSD_CARD_TYPE_HS_26) {
198 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
199 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
200 }
201
202 if (caps & MMC_CAP_MMC_HIGHSPEED &&
203 card_type & EXT_CSD_CARD_TYPE_HS_52) {
204 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
205 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
206 }
207
208 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
209 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
210 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
211 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
212 }
213
214 if (caps & MMC_CAP_1_2V_DDR &&
215 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
216 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
217 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
218 }
219
220 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
221 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
222 hs200_max_dtr = MMC_HS200_MAX_DTR;
223 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
224 }
225
226 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
227 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
228 hs200_max_dtr = MMC_HS200_MAX_DTR;
229 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
230 }
231
232 if (caps2 & MMC_CAP2_HS400_1_8V &&
233 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
234 hs200_max_dtr = MMC_HS200_MAX_DTR;
235 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
236 }
237
238 if (caps2 & MMC_CAP2_HS400_1_2V &&
239 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
240 hs200_max_dtr = MMC_HS200_MAX_DTR;
241 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
242 }
243
244 if ((caps2 & MMC_CAP2_HS400_ES) &&
245 card->ext_csd.strobe_support &&
246 (avail_type & EXT_CSD_CARD_TYPE_HS400))
247 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
248
249 card->ext_csd.hs_max_dtr = hs_max_dtr;
250 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
251 card->mmc_avail_type = avail_type;
252}
253
254static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
255{
256 u8 hc_erase_grp_sz, hc_wp_grp_sz;
257
258
259
260
261 card->ext_csd.enhanced_area_offset = -EINVAL;
262 card->ext_csd.enhanced_area_size = -EINVAL;
263
264
265
266
267
268
269 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
270 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
271 if (card->ext_csd.partition_setting_completed) {
272 hc_erase_grp_sz =
273 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
274 hc_wp_grp_sz =
275 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
276
277
278
279
280 card->ext_csd.enhanced_area_offset =
281 (((unsigned long long)ext_csd[139]) << 24) +
282 (((unsigned long long)ext_csd[138]) << 16) +
283 (((unsigned long long)ext_csd[137]) << 8) +
284 (((unsigned long long)ext_csd[136]));
285 if (mmc_card_blockaddr(card))
286 card->ext_csd.enhanced_area_offset <<= 9;
287
288
289
290 card->ext_csd.enhanced_area_size =
291 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
292 ext_csd[140];
293 card->ext_csd.enhanced_area_size *=
294 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
295 card->ext_csd.enhanced_area_size <<= 9;
296 } else {
297 pr_warn("%s: defines enhanced area without partition setting complete\n",
298 mmc_hostname(card->host));
299 }
300 }
301}
302
303static void mmc_part_add(struct mmc_card *card, unsigned int size,
304 unsigned int part_cfg, char *name, int idx, bool ro,
305 int area_type)
306{
307 card->part[card->nr_parts].size = size;
308 card->part[card->nr_parts].part_cfg = part_cfg;
309 sprintf(card->part[card->nr_parts].name, name, idx);
310 card->part[card->nr_parts].force_ro = ro;
311 card->part[card->nr_parts].area_type = area_type;
312 card->nr_parts++;
313}
314
315static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
316{
317 int idx;
318 u8 hc_erase_grp_sz, hc_wp_grp_sz;
319 unsigned int part_size;
320
321
322
323
324
325
326 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
327 EXT_CSD_PART_SUPPORT_PART_EN) {
328 hc_erase_grp_sz =
329 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
330 hc_wp_grp_sz =
331 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
332
333 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
334 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
335 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
336 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
337 continue;
338 if (card->ext_csd.partition_setting_completed == 0) {
339 pr_warn("%s: has partition size defined without partition complete\n",
340 mmc_hostname(card->host));
341 break;
342 }
343 part_size =
344 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
345 << 16) +
346 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
347 << 8) +
348 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
349 part_size *= (size_t)(hc_erase_grp_sz *
350 hc_wp_grp_sz);
351 mmc_part_add(card, part_size << 19,
352 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
353 "gp%d", idx, false,
354 MMC_BLK_DATA_AREA_GP);
355 }
356 }
357}
358
359
360#define MMC_MIN_PART_SWITCH_TIME 300
361
362
363
364
365static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
366{
367 int err = 0, idx;
368 unsigned int part_size;
369 struct device_node *np;
370 bool broken_hpi = false;
371
372
373 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
374 if (card->csd.structure == 3) {
375 if (card->ext_csd.raw_ext_csd_structure > 2) {
376 pr_err("%s: unrecognised EXT_CSD structure "
377 "version %d\n", mmc_hostname(card->host),
378 card->ext_csd.raw_ext_csd_structure);
379 err = -EINVAL;
380 goto out;
381 }
382 }
383
384 np = mmc_of_find_child_device(card->host, 0);
385 if (np && of_device_is_compatible(np, "mmc-card"))
386 broken_hpi = of_property_read_bool(np, "broken-hpi");
387 of_node_put(np);
388
389
390
391
392
393
394 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
395
396
397 mmc_fixup_device(card, mmc_ext_csd_fixups);
398
399 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
400 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
401 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
402 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
403 if (card->ext_csd.rev >= 2) {
404 card->ext_csd.sectors =
405 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
406 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
407 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
408 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
409
410
411 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
412 mmc_card_set_blockaddr(card);
413 }
414
415 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
416 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
417 mmc_select_card_type(card);
418
419 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
420 card->ext_csd.raw_erase_timeout_mult =
421 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
422 card->ext_csd.raw_hc_erase_grp_size =
423 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
424 if (card->ext_csd.rev >= 3) {
425 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
426 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
427
428
429 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
430
431 if (card->ext_csd.part_time &&
432 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
433 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
434
435
436 if (sa_shift > 0 && sa_shift <= 0x17)
437 card->ext_csd.sa_timeout =
438 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
439 card->ext_csd.erase_group_def =
440 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
441 card->ext_csd.hc_erase_timeout = 300 *
442 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
443 card->ext_csd.hc_erase_size =
444 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
445
446 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
447
448
449
450
451
452 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
453 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
454 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
455 mmc_part_add(card, part_size,
456 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
457 "boot%d", idx, true,
458 MMC_BLK_DATA_AREA_BOOT);
459 }
460 }
461 }
462
463 card->ext_csd.raw_hc_erase_gap_size =
464 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
465 card->ext_csd.raw_sec_trim_mult =
466 ext_csd[EXT_CSD_SEC_TRIM_MULT];
467 card->ext_csd.raw_sec_erase_mult =
468 ext_csd[EXT_CSD_SEC_ERASE_MULT];
469 card->ext_csd.raw_sec_feature_support =
470 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
471 card->ext_csd.raw_trim_mult =
472 ext_csd[EXT_CSD_TRIM_MULT];
473 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
474 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
475 if (card->ext_csd.rev >= 4) {
476 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
477 EXT_CSD_PART_SETTING_COMPLETED)
478 card->ext_csd.partition_setting_completed = 1;
479 else
480 card->ext_csd.partition_setting_completed = 0;
481
482 mmc_manage_enhanced_area(card, ext_csd);
483
484 mmc_manage_gp_partitions(card, ext_csd);
485
486 card->ext_csd.sec_trim_mult =
487 ext_csd[EXT_CSD_SEC_TRIM_MULT];
488 card->ext_csd.sec_erase_mult =
489 ext_csd[EXT_CSD_SEC_ERASE_MULT];
490 card->ext_csd.sec_feature_support =
491 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
492 card->ext_csd.trim_timeout = 300 *
493 ext_csd[EXT_CSD_TRIM_MULT];
494
495
496
497
498
499
500 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
501 card->ext_csd.boot_ro_lockable = true;
502
503
504 card->ext_csd.raw_pwr_cl_52_195 =
505 ext_csd[EXT_CSD_PWR_CL_52_195];
506 card->ext_csd.raw_pwr_cl_26_195 =
507 ext_csd[EXT_CSD_PWR_CL_26_195];
508 card->ext_csd.raw_pwr_cl_52_360 =
509 ext_csd[EXT_CSD_PWR_CL_52_360];
510 card->ext_csd.raw_pwr_cl_26_360 =
511 ext_csd[EXT_CSD_PWR_CL_26_360];
512 card->ext_csd.raw_pwr_cl_200_195 =
513 ext_csd[EXT_CSD_PWR_CL_200_195];
514 card->ext_csd.raw_pwr_cl_200_360 =
515 ext_csd[EXT_CSD_PWR_CL_200_360];
516 card->ext_csd.raw_pwr_cl_ddr_52_195 =
517 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
518 card->ext_csd.raw_pwr_cl_ddr_52_360 =
519 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
520 card->ext_csd.raw_pwr_cl_ddr_200_360 =
521 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
522 }
523
524 if (card->ext_csd.rev >= 5) {
525
526 if (card->cid.year < 2010)
527 card->cid.year += 16;
528
529
530 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
531 card->ext_csd.bkops = 1;
532 card->ext_csd.man_bkops_en =
533 (ext_csd[EXT_CSD_BKOPS_EN] &
534 EXT_CSD_MANUAL_BKOPS_MASK);
535 card->ext_csd.raw_bkops_status =
536 ext_csd[EXT_CSD_BKOPS_STATUS];
537 if (card->ext_csd.man_bkops_en)
538 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
539 mmc_hostname(card->host));
540 card->ext_csd.auto_bkops_en =
541 (ext_csd[EXT_CSD_BKOPS_EN] &
542 EXT_CSD_AUTO_BKOPS_MASK);
543 if (card->ext_csd.auto_bkops_en)
544 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
545 mmc_hostname(card->host));
546 }
547
548
549 if (!mmc_card_broken_hpi(card) &&
550 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
551 card->ext_csd.hpi = 1;
552 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
553 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
554 else
555 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
556
557
558
559
560 card->ext_csd.out_of_int_time =
561 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
562 }
563
564 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
565 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
566
567
568
569
570 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
571 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
572 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
573 EXT_CSD_PART_CONFIG_ACC_RPMB,
574 "rpmb", 0, false,
575 MMC_BLK_DATA_AREA_RPMB);
576 }
577 }
578
579 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
580 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
581 card->erased_byte = 0xFF;
582 else
583 card->erased_byte = 0x0;
584
585
586 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
587 if (card->ext_csd.rev >= 6) {
588 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
589
590 card->ext_csd.generic_cmd6_time = 10 *
591 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
592 card->ext_csd.power_off_longtime = 10 *
593 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
594
595 card->ext_csd.cache_size =
596 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
597 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
598 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
599 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
600
601 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
602 card->ext_csd.data_sector_size = 4096;
603 else
604 card->ext_csd.data_sector_size = 512;
605
606 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
607 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
608 card->ext_csd.data_tag_unit_size =
609 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
610 (card->ext_csd.data_sector_size);
611 } else {
612 card->ext_csd.data_tag_unit_size = 0;
613 }
614
615 card->ext_csd.max_packed_writes =
616 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
617 card->ext_csd.max_packed_reads =
618 ext_csd[EXT_CSD_MAX_PACKED_READS];
619 } else {
620 card->ext_csd.data_sector_size = 512;
621 }
622
623
624 if (card->ext_csd.rev >= 7) {
625 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
626 MMC_FIRMWARE_LEN);
627 card->ext_csd.ffu_capable =
628 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
629 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
630
631 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
632 card->ext_csd.device_life_time_est_typ_a =
633 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
634 card->ext_csd.device_life_time_est_typ_b =
635 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
636 }
637
638
639 if (card->ext_csd.rev >= 8) {
640 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
641 EXT_CSD_CMDQ_SUPPORTED;
642 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
643 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
644
645 if (card->ext_csd.cmdq_depth <= 2) {
646 card->ext_csd.cmdq_support = false;
647 card->ext_csd.cmdq_depth = 0;
648 }
649 if (card->ext_csd.cmdq_support) {
650 pr_debug("%s: Command Queue supported depth %u\n",
651 mmc_hostname(card->host),
652 card->ext_csd.cmdq_depth);
653 }
654 }
655out:
656 return err;
657}
658
659static int mmc_read_ext_csd(struct mmc_card *card)
660{
661 u8 *ext_csd;
662 int err;
663
664 if (!mmc_can_ext_csd(card))
665 return 0;
666
667 err = mmc_get_ext_csd(card, &ext_csd);
668 if (err) {
669
670
671 if ((err != -EINVAL)
672 && (err != -ENOSYS)
673 && (err != -EFAULT))
674 return err;
675
676
677
678
679
680 if (card->csd.capacity == (4096 * 512)) {
681 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
682 mmc_hostname(card->host));
683 } else {
684 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
685 mmc_hostname(card->host));
686 err = 0;
687 }
688
689 return err;
690 }
691
692 err = mmc_decode_ext_csd(card, ext_csd);
693 kfree(ext_csd);
694 return err;
695}
696
697static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
698{
699 u8 *bw_ext_csd;
700 int err;
701
702 if (bus_width == MMC_BUS_WIDTH_1)
703 return 0;
704
705 err = mmc_get_ext_csd(card, &bw_ext_csd);
706 if (err)
707 return err;
708
709
710 err = !((card->ext_csd.raw_partition_support ==
711 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
712 (card->ext_csd.raw_erased_mem_count ==
713 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
714 (card->ext_csd.rev ==
715 bw_ext_csd[EXT_CSD_REV]) &&
716 (card->ext_csd.raw_ext_csd_structure ==
717 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
718 (card->ext_csd.raw_card_type ==
719 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
720 (card->ext_csd.raw_s_a_timeout ==
721 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
722 (card->ext_csd.raw_hc_erase_gap_size ==
723 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
724 (card->ext_csd.raw_erase_timeout_mult ==
725 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
726 (card->ext_csd.raw_hc_erase_grp_size ==
727 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
728 (card->ext_csd.raw_sec_trim_mult ==
729 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
730 (card->ext_csd.raw_sec_erase_mult ==
731 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
732 (card->ext_csd.raw_sec_feature_support ==
733 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
734 (card->ext_csd.raw_trim_mult ==
735 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
736 (card->ext_csd.raw_sectors[0] ==
737 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
738 (card->ext_csd.raw_sectors[1] ==
739 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
740 (card->ext_csd.raw_sectors[2] ==
741 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
742 (card->ext_csd.raw_sectors[3] ==
743 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
744 (card->ext_csd.raw_pwr_cl_52_195 ==
745 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
746 (card->ext_csd.raw_pwr_cl_26_195 ==
747 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
748 (card->ext_csd.raw_pwr_cl_52_360 ==
749 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
750 (card->ext_csd.raw_pwr_cl_26_360 ==
751 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
752 (card->ext_csd.raw_pwr_cl_200_195 ==
753 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
754 (card->ext_csd.raw_pwr_cl_200_360 ==
755 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
756 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
757 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
758 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
759 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
760 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
761 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
762
763 if (err)
764 err = -EINVAL;
765
766 kfree(bw_ext_csd);
767 return err;
768}
769
770MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
771 card->raw_cid[2], card->raw_cid[3]);
772MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
773 card->raw_csd[2], card->raw_csd[3]);
774MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
775MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
776MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
777MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
778MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
779MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
780MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
781MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
782MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
783MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
784MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
785MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
786 card->ext_csd.device_life_time_est_typ_a,
787 card->ext_csd.device_life_time_est_typ_b);
788MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
789MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
790 card->ext_csd.enhanced_area_offset);
791MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
792MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
793MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
794MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
795MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
796MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
797
798static ssize_t mmc_fwrev_show(struct device *dev,
799 struct device_attribute *attr,
800 char *buf)
801{
802 struct mmc_card *card = mmc_dev_to_card(dev);
803
804 if (card->ext_csd.rev < 7) {
805 return sprintf(buf, "0x%x\n", card->cid.fwrev);
806 } else {
807 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
808 card->ext_csd.fwrev);
809 }
810}
811
812static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
813
814static ssize_t mmc_dsr_show(struct device *dev,
815 struct device_attribute *attr,
816 char *buf)
817{
818 struct mmc_card *card = mmc_dev_to_card(dev);
819 struct mmc_host *host = card->host;
820
821 if (card->csd.dsr_imp && host->dsr_req)
822 return sprintf(buf, "0x%x\n", host->dsr);
823 else
824
825 return sprintf(buf, "0x%x\n", 0x404);
826}
827
828static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
829
830static struct attribute *mmc_std_attrs[] = {
831 &dev_attr_cid.attr,
832 &dev_attr_csd.attr,
833 &dev_attr_date.attr,
834 &dev_attr_erase_size.attr,
835 &dev_attr_preferred_erase_size.attr,
836 &dev_attr_fwrev.attr,
837 &dev_attr_ffu_capable.attr,
838 &dev_attr_hwrev.attr,
839 &dev_attr_manfid.attr,
840 &dev_attr_name.attr,
841 &dev_attr_oemid.attr,
842 &dev_attr_prv.attr,
843 &dev_attr_rev.attr,
844 &dev_attr_pre_eol_info.attr,
845 &dev_attr_life_time.attr,
846 &dev_attr_serial.attr,
847 &dev_attr_enhanced_area_offset.attr,
848 &dev_attr_enhanced_area_size.attr,
849 &dev_attr_raw_rpmb_size_mult.attr,
850 &dev_attr_rel_sectors.attr,
851 &dev_attr_ocr.attr,
852 &dev_attr_rca.attr,
853 &dev_attr_dsr.attr,
854 &dev_attr_cmdq_en.attr,
855 NULL,
856};
857ATTRIBUTE_GROUPS(mmc_std);
858
859static struct device_type mmc_type = {
860 .groups = mmc_std_groups,
861};
862
863
864
865
866
867
868
869static int __mmc_select_powerclass(struct mmc_card *card,
870 unsigned int bus_width)
871{
872 struct mmc_host *host = card->host;
873 struct mmc_ext_csd *ext_csd = &card->ext_csd;
874 unsigned int pwrclass_val = 0;
875 int err = 0;
876
877 switch (1 << host->ios.vdd) {
878 case MMC_VDD_165_195:
879 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
880 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
881 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
882 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
883 ext_csd->raw_pwr_cl_52_195 :
884 ext_csd->raw_pwr_cl_ddr_52_195;
885 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
886 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
887 break;
888 case MMC_VDD_27_28:
889 case MMC_VDD_28_29:
890 case MMC_VDD_29_30:
891 case MMC_VDD_30_31:
892 case MMC_VDD_31_32:
893 case MMC_VDD_32_33:
894 case MMC_VDD_33_34:
895 case MMC_VDD_34_35:
896 case MMC_VDD_35_36:
897 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
898 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
899 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
900 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
901 ext_csd->raw_pwr_cl_52_360 :
902 ext_csd->raw_pwr_cl_ddr_52_360;
903 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
904 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
905 ext_csd->raw_pwr_cl_ddr_200_360 :
906 ext_csd->raw_pwr_cl_200_360;
907 break;
908 default:
909 pr_warn("%s: Voltage range not supported for power class\n",
910 mmc_hostname(host));
911 return -EINVAL;
912 }
913
914 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
915 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
916 EXT_CSD_PWR_CL_8BIT_SHIFT;
917 else
918 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
919 EXT_CSD_PWR_CL_4BIT_SHIFT;
920
921
922 if (pwrclass_val > 0) {
923 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
924 EXT_CSD_POWER_CLASS,
925 pwrclass_val,
926 card->ext_csd.generic_cmd6_time);
927 }
928
929 return err;
930}
931
932static int mmc_select_powerclass(struct mmc_card *card)
933{
934 struct mmc_host *host = card->host;
935 u32 bus_width, ext_csd_bits;
936 int err, ddr;
937
938
939 if (!mmc_can_ext_csd(card))
940 return 0;
941
942 bus_width = host->ios.bus_width;
943
944 if (bus_width == MMC_BUS_WIDTH_1)
945 return 0;
946
947 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
948 if (ddr)
949 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
950 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
951 else
952 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
953 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
954
955 err = __mmc_select_powerclass(card, ext_csd_bits);
956 if (err)
957 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
958 mmc_hostname(host), 1 << bus_width, ddr);
959
960 return err;
961}
962
963
964
965
966static void mmc_set_bus_speed(struct mmc_card *card)
967{
968 unsigned int max_dtr = (unsigned int)-1;
969
970 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
971 max_dtr > card->ext_csd.hs200_max_dtr)
972 max_dtr = card->ext_csd.hs200_max_dtr;
973 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
974 max_dtr = card->ext_csd.hs_max_dtr;
975 else if (max_dtr > card->csd.max_dtr)
976 max_dtr = card->csd.max_dtr;
977
978 mmc_set_clock(card->host, max_dtr);
979}
980
981
982
983
984
985
986static int mmc_select_bus_width(struct mmc_card *card)
987{
988 static unsigned ext_csd_bits[] = {
989 EXT_CSD_BUS_WIDTH_8,
990 EXT_CSD_BUS_WIDTH_4,
991 };
992 static unsigned bus_widths[] = {
993 MMC_BUS_WIDTH_8,
994 MMC_BUS_WIDTH_4,
995 };
996 struct mmc_host *host = card->host;
997 unsigned idx, bus_width = 0;
998 int err = 0;
999
1000 if (!mmc_can_ext_csd(card) ||
1001 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1002 return 0;
1003
1004 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1005
1006
1007
1008
1009
1010
1011
1012 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1013
1014
1015
1016
1017
1018
1019
1020 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1021 EXT_CSD_BUS_WIDTH,
1022 ext_csd_bits[idx],
1023 card->ext_csd.generic_cmd6_time);
1024 if (err)
1025 continue;
1026
1027 bus_width = bus_widths[idx];
1028 mmc_set_bus_width(host, bus_width);
1029
1030
1031
1032
1033
1034
1035 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1036 err = mmc_compare_ext_csds(card, bus_width);
1037 else
1038 err = mmc_bus_test(card, bus_width);
1039
1040 if (!err) {
1041 err = bus_width;
1042 break;
1043 } else {
1044 pr_warn("%s: switch to bus width %d failed\n",
1045 mmc_hostname(host), 1 << bus_width);
1046 }
1047 }
1048
1049 return err;
1050}
1051
1052
1053
1054
1055static int mmc_select_hs(struct mmc_card *card)
1056{
1057 int err;
1058
1059 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1060 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1061 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1062 true, true, true);
1063 if (err)
1064 pr_warn("%s: switch to high-speed failed, err:%d\n",
1065 mmc_hostname(card->host), err);
1066
1067 return err;
1068}
1069
1070
1071
1072
1073static int mmc_select_hs_ddr(struct mmc_card *card)
1074{
1075 struct mmc_host *host = card->host;
1076 u32 bus_width, ext_csd_bits;
1077 int err = 0;
1078
1079 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1080 return 0;
1081
1082 bus_width = host->ios.bus_width;
1083 if (bus_width == MMC_BUS_WIDTH_1)
1084 return 0;
1085
1086 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1087 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1088
1089 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1090 EXT_CSD_BUS_WIDTH,
1091 ext_csd_bits,
1092 card->ext_csd.generic_cmd6_time,
1093 MMC_TIMING_MMC_DDR52,
1094 true, true, true);
1095 if (err) {
1096 pr_err("%s: switch to bus width %d ddr failed\n",
1097 mmc_hostname(host), 1 << bus_width);
1098 return err;
1099 }
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1127 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1128 if (!err)
1129 return 0;
1130 }
1131
1132 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1133 host->caps & MMC_CAP_1_8V_DDR)
1134 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1135
1136
1137 if (err)
1138 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1139
1140 return err;
1141}
1142
1143static int mmc_select_hs400(struct mmc_card *card)
1144{
1145 struct mmc_host *host = card->host;
1146 unsigned int max_dtr;
1147 int err = 0;
1148 u8 val;
1149
1150
1151
1152
1153 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1154 host->ios.bus_width == MMC_BUS_WIDTH_8))
1155 return 0;
1156
1157
1158 val = EXT_CSD_TIMING_HS;
1159 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1160 EXT_CSD_HS_TIMING, val,
1161 card->ext_csd.generic_cmd6_time, 0,
1162 true, false, true);
1163 if (err) {
1164 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1165 mmc_hostname(host), err);
1166 return err;
1167 }
1168
1169
1170 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1171
1172
1173 if (host->ops->hs400_downgrade)
1174 host->ops->hs400_downgrade(host);
1175
1176
1177 max_dtr = card->ext_csd.hs_max_dtr;
1178 mmc_set_clock(host, max_dtr);
1179
1180 err = mmc_switch_status(card);
1181 if (err)
1182 goto out_err;
1183
1184 if (host->ops->hs400_prepare_ddr)
1185 host->ops->hs400_prepare_ddr(host);
1186
1187
1188 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1189 EXT_CSD_BUS_WIDTH,
1190 EXT_CSD_DDR_BUS_WIDTH_8,
1191 card->ext_csd.generic_cmd6_time);
1192 if (err) {
1193 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1194 mmc_hostname(host), err);
1195 return err;
1196 }
1197
1198
1199 val = EXT_CSD_TIMING_HS400 |
1200 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1201 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1202 EXT_CSD_HS_TIMING, val,
1203 card->ext_csd.generic_cmd6_time, 0,
1204 true, false, true);
1205 if (err) {
1206 pr_err("%s: switch to hs400 failed, err:%d\n",
1207 mmc_hostname(host), err);
1208 return err;
1209 }
1210
1211
1212 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1213 mmc_set_bus_speed(card);
1214
1215 err = mmc_switch_status(card);
1216 if (err)
1217 goto out_err;
1218
1219 if (host->ops->hs400_complete)
1220 host->ops->hs400_complete(host);
1221
1222 return 0;
1223
1224out_err:
1225 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1226 __func__, err);
1227 return err;
1228}
1229
1230int mmc_hs200_to_hs400(struct mmc_card *card)
1231{
1232 return mmc_select_hs400(card);
1233}
1234
1235int mmc_hs400_to_hs200(struct mmc_card *card)
1236{
1237 struct mmc_host *host = card->host;
1238 unsigned int max_dtr;
1239 int err;
1240 u8 val;
1241
1242
1243 max_dtr = card->ext_csd.hs_max_dtr;
1244 mmc_set_clock(host, max_dtr);
1245
1246
1247 val = EXT_CSD_TIMING_HS;
1248 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1249 val, card->ext_csd.generic_cmd6_time, 0,
1250 true, false, true);
1251 if (err)
1252 goto out_err;
1253
1254 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1255
1256 err = mmc_switch_status(card);
1257 if (err)
1258 goto out_err;
1259
1260
1261 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1262 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1263 0, true, false, true);
1264 if (err)
1265 goto out_err;
1266
1267 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1268
1269 if (host->ops->hs400_downgrade)
1270 host->ops->hs400_downgrade(host);
1271
1272 err = mmc_switch_status(card);
1273 if (err)
1274 goto out_err;
1275
1276
1277 val = EXT_CSD_TIMING_HS200 |
1278 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1279 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1280 val, card->ext_csd.generic_cmd6_time, 0,
1281 true, false, true);
1282 if (err)
1283 goto out_err;
1284
1285 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1286
1287
1288
1289
1290
1291
1292 err = __mmc_switch_status(card, false);
1293 if (err)
1294 goto out_err;
1295
1296 mmc_set_bus_speed(card);
1297
1298
1299 if (host->ops->prepare_hs400_tuning)
1300 host->ops->prepare_hs400_tuning(host, &host->ios);
1301
1302 return 0;
1303
1304out_err:
1305 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1306 __func__, err);
1307 return err;
1308}
1309
1310static void mmc_select_driver_type(struct mmc_card *card)
1311{
1312 int card_drv_type, drive_strength, drv_type = 0;
1313 int fixed_drv_type = card->host->fixed_drv_type;
1314
1315 card_drv_type = card->ext_csd.raw_driver_strength |
1316 mmc_driver_type_mask(0);
1317
1318 if (fixed_drv_type >= 0)
1319 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1320 ? fixed_drv_type : 0;
1321 else
1322 drive_strength = mmc_select_drive_strength(card,
1323 card->ext_csd.hs200_max_dtr,
1324 card_drv_type, &drv_type);
1325
1326 card->drive_strength = drive_strength;
1327
1328 if (drv_type)
1329 mmc_set_driver_type(card->host, drv_type);
1330}
1331
1332static int mmc_select_hs400es(struct mmc_card *card)
1333{
1334 struct mmc_host *host = card->host;
1335 int err = -EINVAL;
1336 u8 val;
1337
1338 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1339 err = -ENOTSUPP;
1340 goto out_err;
1341 }
1342
1343 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1344 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1345
1346 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1347 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1348
1349
1350 if (err)
1351 goto out_err;
1352
1353 err = mmc_select_bus_width(card);
1354 if (err != MMC_BUS_WIDTH_8) {
1355 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1356 mmc_hostname(host), err);
1357 err = err < 0 ? err : -ENOTSUPP;
1358 goto out_err;
1359 }
1360
1361
1362 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1363 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1364 card->ext_csd.generic_cmd6_time, 0,
1365 true, false, true);
1366 if (err) {
1367 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1368 mmc_hostname(host), err);
1369 goto out_err;
1370 }
1371
1372 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1373 err = mmc_switch_status(card);
1374 if (err)
1375 goto out_err;
1376
1377 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1378
1379
1380 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1381 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1382 EXT_CSD_BUS_WIDTH,
1383 val,
1384 card->ext_csd.generic_cmd6_time);
1385 if (err) {
1386 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1387 mmc_hostname(host), err);
1388 goto out_err;
1389 }
1390
1391 mmc_select_driver_type(card);
1392
1393
1394 val = EXT_CSD_TIMING_HS400 |
1395 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1396 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1397 EXT_CSD_HS_TIMING, val,
1398 card->ext_csd.generic_cmd6_time, 0,
1399 true, false, true);
1400 if (err) {
1401 pr_err("%s: switch to hs400es failed, err:%d\n",
1402 mmc_hostname(host), err);
1403 goto out_err;
1404 }
1405
1406
1407 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1408
1409
1410 host->ios.enhanced_strobe = true;
1411 if (host->ops->hs400_enhanced_strobe)
1412 host->ops->hs400_enhanced_strobe(host, &host->ios);
1413
1414 err = mmc_switch_status(card);
1415 if (err)
1416 goto out_err;
1417
1418 return 0;
1419
1420out_err:
1421 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1422 __func__, err);
1423 return err;
1424}
1425
1426
1427
1428
1429
1430
1431
1432
1433static int mmc_select_hs200(struct mmc_card *card)
1434{
1435 struct mmc_host *host = card->host;
1436 unsigned int old_timing, old_signal_voltage;
1437 int err = -EINVAL;
1438 u8 val;
1439
1440 old_signal_voltage = host->ios.signal_voltage;
1441 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1442 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1443
1444 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1445 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1446
1447
1448 if (err)
1449 return err;
1450
1451 mmc_select_driver_type(card);
1452
1453
1454
1455
1456
1457 err = mmc_select_bus_width(card);
1458 if (err > 0) {
1459 val = EXT_CSD_TIMING_HS200 |
1460 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1461 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1462 EXT_CSD_HS_TIMING, val,
1463 card->ext_csd.generic_cmd6_time, 0,
1464 true, false, true);
1465 if (err)
1466 goto err;
1467 old_timing = host->ios.timing;
1468 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1469
1470
1471
1472
1473
1474
1475 err = __mmc_switch_status(card, false);
1476
1477
1478
1479
1480
1481 if (err == -EBADMSG)
1482 mmc_set_timing(host, old_timing);
1483 }
1484err:
1485 if (err) {
1486
1487 if (mmc_set_signal_voltage(host, old_signal_voltage))
1488 err = -EIO;
1489
1490 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1491 __func__, err);
1492 }
1493 return err;
1494}
1495
1496
1497
1498
1499static int mmc_select_timing(struct mmc_card *card)
1500{
1501 int err = 0;
1502
1503 if (!mmc_can_ext_csd(card))
1504 goto bus_speed;
1505
1506 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1507 err = mmc_select_hs400es(card);
1508 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1509 err = mmc_select_hs200(card);
1510 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1511 err = mmc_select_hs(card);
1512
1513 if (err && err != -EBADMSG)
1514 return err;
1515
1516bus_speed:
1517
1518
1519
1520
1521 mmc_set_bus_speed(card);
1522 return 0;
1523}
1524
1525
1526
1527
1528
1529static int mmc_hs200_tuning(struct mmc_card *card)
1530{
1531 struct mmc_host *host = card->host;
1532
1533
1534
1535
1536
1537 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1538 host->ios.bus_width == MMC_BUS_WIDTH_8)
1539 if (host->ops->prepare_hs400_tuning)
1540 host->ops->prepare_hs400_tuning(host, &host->ios);
1541
1542 return mmc_execute_tuning(card);
1543}
1544
1545
1546
1547
1548
1549
1550
1551static int mmc_init_card(struct mmc_host *host, u32 ocr,
1552 struct mmc_card *oldcard)
1553{
1554 struct mmc_card *card;
1555 int err;
1556 u32 cid[4];
1557 u32 rocr;
1558
1559 WARN_ON(!host->claimed);
1560
1561
1562 if (!mmc_host_is_spi(host))
1563 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1564
1565
1566
1567
1568
1569
1570
1571
1572 mmc_go_idle(host);
1573
1574
1575 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1576 if (err)
1577 goto err;
1578
1579
1580
1581
1582 if (mmc_host_is_spi(host)) {
1583 err = mmc_spi_set_crc(host, use_spi_crc);
1584 if (err)
1585 goto err;
1586 }
1587
1588
1589
1590
1591 err = mmc_send_cid(host, cid);
1592 if (err)
1593 goto err;
1594
1595 if (oldcard) {
1596 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1597 err = -ENOENT;
1598 goto err;
1599 }
1600
1601 card = oldcard;
1602 } else {
1603
1604
1605
1606 card = mmc_alloc_card(host, &mmc_type);
1607 if (IS_ERR(card)) {
1608 err = PTR_ERR(card);
1609 goto err;
1610 }
1611
1612 card->ocr = ocr;
1613 card->type = MMC_TYPE_MMC;
1614 card->rca = 1;
1615 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1616 }
1617
1618
1619
1620
1621 if (host->ops->init_card)
1622 host->ops->init_card(host, card);
1623
1624
1625
1626
1627 if (!mmc_host_is_spi(host)) {
1628 err = mmc_set_relative_addr(card);
1629 if (err)
1630 goto free_card;
1631
1632 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1633 }
1634
1635 if (!oldcard) {
1636
1637
1638
1639 err = mmc_send_csd(card, card->raw_csd);
1640 if (err)
1641 goto free_card;
1642
1643 err = mmc_decode_csd(card);
1644 if (err)
1645 goto free_card;
1646 err = mmc_decode_cid(card);
1647 if (err)
1648 goto free_card;
1649 }
1650
1651
1652
1653
1654
1655 if (card->csd.dsr_imp && host->dsr_req)
1656 mmc_set_dsr(host);
1657
1658
1659
1660
1661 if (!mmc_host_is_spi(host)) {
1662 err = mmc_select_card(card);
1663 if (err)
1664 goto free_card;
1665 }
1666
1667 if (!oldcard) {
1668
1669 err = mmc_read_ext_csd(card);
1670 if (err)
1671 goto free_card;
1672
1673
1674
1675
1676
1677
1678
1679 if (rocr & BIT(30))
1680 mmc_card_set_blockaddr(card);
1681
1682
1683 mmc_set_erase_size(card);
1684 }
1685
1686
1687 if (card->ext_csd.rev >= 3) {
1688 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1689 EXT_CSD_ERASE_GROUP_DEF, 1,
1690 card->ext_csd.generic_cmd6_time);
1691
1692 if (err && err != -EBADMSG)
1693 goto free_card;
1694
1695 if (err) {
1696 err = 0;
1697
1698
1699
1700
1701
1702 card->ext_csd.enhanced_area_offset = -EINVAL;
1703 card->ext_csd.enhanced_area_size = -EINVAL;
1704 } else {
1705 card->ext_csd.erase_group_def = 1;
1706
1707
1708
1709
1710
1711 mmc_set_erase_size(card);
1712 }
1713 }
1714
1715
1716
1717
1718 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1719 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1720 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1721 card->ext_csd.part_config,
1722 card->ext_csd.part_time);
1723 if (err && err != -EBADMSG)
1724 goto free_card;
1725 }
1726
1727
1728
1729
1730 if (card->ext_csd.rev >= 6) {
1731 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1732 EXT_CSD_POWER_OFF_NOTIFICATION,
1733 EXT_CSD_POWER_ON,
1734 card->ext_csd.generic_cmd6_time);
1735 if (err && err != -EBADMSG)
1736 goto free_card;
1737
1738
1739
1740
1741
1742 if (!err)
1743 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1744 }
1745
1746
1747
1748
1749 err = mmc_select_timing(card);
1750 if (err)
1751 goto free_card;
1752
1753 if (mmc_card_hs200(card)) {
1754 err = mmc_hs200_tuning(card);
1755 if (err)
1756 goto free_card;
1757
1758 err = mmc_select_hs400(card);
1759 if (err)
1760 goto free_card;
1761 } else if (!mmc_card_hs400es(card)) {
1762
1763 err = mmc_select_bus_width(card);
1764 if (err > 0 && mmc_card_hs(card)) {
1765 err = mmc_select_hs_ddr(card);
1766 if (err)
1767 goto free_card;
1768 }
1769 }
1770
1771
1772
1773
1774 mmc_select_powerclass(card);
1775
1776
1777
1778
1779 if (card->ext_csd.hpi) {
1780 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1781 EXT_CSD_HPI_MGMT, 1,
1782 card->ext_csd.generic_cmd6_time);
1783 if (err && err != -EBADMSG)
1784 goto free_card;
1785 if (err) {
1786 pr_warn("%s: Enabling HPI failed\n",
1787 mmc_hostname(card->host));
1788 card->ext_csd.hpi_en = 0;
1789 err = 0;
1790 } else {
1791 card->ext_csd.hpi_en = 1;
1792 }
1793 }
1794
1795
1796
1797
1798
1799
1800
1801
1802 if (card->ext_csd.cache_size > 0) {
1803 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1804
1805 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1806 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1807 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1808 if (err && err != -EBADMSG)
1809 goto free_card;
1810
1811
1812
1813
1814 if (err) {
1815 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1816 mmc_hostname(card->host), err);
1817 card->ext_csd.cache_ctrl = 0;
1818 err = 0;
1819 } else {
1820 card->ext_csd.cache_ctrl = 1;
1821 }
1822 }
1823
1824
1825
1826
1827
1828 card->ext_csd.cmdq_en = false;
1829 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1830 err = mmc_cmdq_enable(card);
1831 if (err && err != -EBADMSG)
1832 goto free_card;
1833 if (err) {
1834 pr_warn("%s: Enabling CMDQ failed\n",
1835 mmc_hostname(card->host));
1836 card->ext_csd.cmdq_support = false;
1837 card->ext_csd.cmdq_depth = 0;
1838 err = 0;
1839 }
1840 }
1841
1842
1843
1844
1845
1846 card->reenable_cmdq = card->ext_csd.cmdq_en;
1847
1848 if (card->ext_csd.cmdq_en && !host->cqe_enabled) {
1849 err = host->cqe_ops->cqe_enable(host, card);
1850 if (err) {
1851 pr_err("%s: Failed to enable CQE, error %d\n",
1852 mmc_hostname(host), err);
1853 } else {
1854 host->cqe_enabled = true;
1855 pr_info("%s: Command Queue Engine enabled\n",
1856 mmc_hostname(host));
1857 }
1858 }
1859
1860 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1861 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1862 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1863 mmc_hostname(host));
1864 err = -EINVAL;
1865 goto free_card;
1866 }
1867
1868 if (!oldcard)
1869 host->card = card;
1870
1871 return 0;
1872
1873free_card:
1874 if (!oldcard)
1875 mmc_remove_card(card);
1876err:
1877 return err;
1878}
1879
1880static int mmc_can_sleep(struct mmc_card *card)
1881{
1882 return (card && card->ext_csd.rev >= 3);
1883}
1884
1885static int mmc_sleep(struct mmc_host *host)
1886{
1887 struct mmc_command cmd = {};
1888 struct mmc_card *card = host->card;
1889 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1890 int err;
1891
1892
1893 mmc_retune_hold(host);
1894
1895 err = mmc_deselect_cards(host);
1896 if (err)
1897 goto out_release;
1898
1899 cmd.opcode = MMC_SLEEP_AWAKE;
1900 cmd.arg = card->rca << 16;
1901 cmd.arg |= 1 << 15;
1902
1903
1904
1905
1906
1907
1908
1909 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1910 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1911 } else {
1912 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1913 cmd.busy_timeout = timeout_ms;
1914 }
1915
1916 err = mmc_wait_for_cmd(host, &cmd, 0);
1917 if (err)
1918 goto out_release;
1919
1920
1921
1922
1923
1924
1925
1926 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1927 mmc_delay(timeout_ms);
1928
1929out_release:
1930 mmc_retune_release(host);
1931 return err;
1932}
1933
1934static int mmc_can_poweroff_notify(const struct mmc_card *card)
1935{
1936 return card &&
1937 mmc_card_mmc(card) &&
1938 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1939}
1940
1941static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1942{
1943 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1944 int err;
1945
1946
1947 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1948 timeout = card->ext_csd.power_off_longtime;
1949
1950 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1951 EXT_CSD_POWER_OFF_NOTIFICATION,
1952 notify_type, timeout, 0, true, false, false);
1953 if (err)
1954 pr_err("%s: Power Off Notification timed out, %u\n",
1955 mmc_hostname(card->host), timeout);
1956
1957
1958 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1959
1960 return err;
1961}
1962
1963
1964
1965
1966static void mmc_remove(struct mmc_host *host)
1967{
1968 mmc_remove_card(host->card);
1969 host->card = NULL;
1970}
1971
1972
1973
1974
1975static int mmc_alive(struct mmc_host *host)
1976{
1977 return mmc_send_status(host->card, NULL);
1978}
1979
1980
1981
1982
1983static void mmc_detect(struct mmc_host *host)
1984{
1985 int err;
1986
1987 mmc_get_card(host->card, NULL);
1988
1989
1990
1991
1992 err = _mmc_detect_card_removed(host);
1993
1994 mmc_put_card(host->card, NULL);
1995
1996 if (err) {
1997 mmc_remove(host);
1998
1999 mmc_claim_host(host);
2000 mmc_detach_bus(host);
2001 mmc_power_off(host);
2002 mmc_release_host(host);
2003 }
2004}
2005
2006static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2007{
2008 int err = 0;
2009 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2010 EXT_CSD_POWER_OFF_LONG;
2011
2012 mmc_claim_host(host);
2013
2014 if (mmc_card_suspended(host->card))
2015 goto out;
2016
2017 err = mmc_flush_cache(host->card);
2018 if (err)
2019 goto out;
2020
2021 if (mmc_can_poweroff_notify(host->card) &&
2022 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
2023 err = mmc_poweroff_notify(host->card, notify_type);
2024 else if (mmc_can_sleep(host->card))
2025 err = mmc_sleep(host);
2026 else if (!mmc_host_is_spi(host))
2027 err = mmc_deselect_cards(host);
2028
2029 if (!err) {
2030 mmc_power_off(host);
2031 mmc_card_set_suspended(host->card);
2032 }
2033out:
2034 mmc_release_host(host);
2035 return err;
2036}
2037
2038
2039
2040
2041static int mmc_suspend(struct mmc_host *host)
2042{
2043 int err;
2044
2045 err = _mmc_suspend(host, true);
2046 if (!err) {
2047 pm_runtime_disable(&host->card->dev);
2048 pm_runtime_set_suspended(&host->card->dev);
2049 }
2050
2051 return err;
2052}
2053
2054
2055
2056
2057
2058static int _mmc_resume(struct mmc_host *host)
2059{
2060 int err = 0;
2061
2062 mmc_claim_host(host);
2063
2064 if (!mmc_card_suspended(host->card))
2065 goto out;
2066
2067 mmc_power_up(host, host->card->ocr);
2068 err = mmc_init_card(host, host->card->ocr, host->card);
2069 mmc_card_clr_suspended(host->card);
2070
2071out:
2072 mmc_release_host(host);
2073 return err;
2074}
2075
2076
2077
2078
2079static int mmc_shutdown(struct mmc_host *host)
2080{
2081 int err = 0;
2082
2083
2084
2085
2086
2087 if (mmc_can_poweroff_notify(host->card) &&
2088 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2089 err = _mmc_resume(host);
2090
2091 if (!err)
2092 err = _mmc_suspend(host, false);
2093
2094 return err;
2095}
2096
2097
2098
2099
2100static int mmc_resume(struct mmc_host *host)
2101{
2102 pm_runtime_enable(&host->card->dev);
2103 return 0;
2104}
2105
2106
2107
2108
2109static int mmc_runtime_suspend(struct mmc_host *host)
2110{
2111 int err;
2112
2113 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2114 return 0;
2115
2116 err = _mmc_suspend(host, true);
2117 if (err)
2118 pr_err("%s: error %d doing aggressive suspend\n",
2119 mmc_hostname(host), err);
2120
2121 return err;
2122}
2123
2124
2125
2126
2127static int mmc_runtime_resume(struct mmc_host *host)
2128{
2129 int err;
2130
2131 err = _mmc_resume(host);
2132 if (err && err != -ENOMEDIUM)
2133 pr_err("%s: error %d doing runtime resume\n",
2134 mmc_hostname(host), err);
2135
2136 return 0;
2137}
2138
2139static int mmc_can_reset(struct mmc_card *card)
2140{
2141 u8 rst_n_function;
2142
2143 rst_n_function = card->ext_csd.rst_n_function;
2144 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2145 return 0;
2146 return 1;
2147}
2148
2149static int _mmc_hw_reset(struct mmc_host *host)
2150{
2151 struct mmc_card *card = host->card;
2152
2153
2154
2155
2156
2157 mmc_flush_cache(host->card);
2158
2159 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2160 mmc_can_reset(card)) {
2161
2162 mmc_set_clock(host, host->f_init);
2163 host->ops->hw_reset(host);
2164
2165 mmc_set_initial_state(host);
2166 } else {
2167
2168 mmc_power_cycle(host, card->ocr);
2169 mmc_pwrseq_reset(host);
2170 }
2171 return mmc_init_card(host, card->ocr, card);
2172}
2173
2174static const struct mmc_bus_ops mmc_ops = {
2175 .remove = mmc_remove,
2176 .detect = mmc_detect,
2177 .suspend = mmc_suspend,
2178 .resume = mmc_resume,
2179 .runtime_suspend = mmc_runtime_suspend,
2180 .runtime_resume = mmc_runtime_resume,
2181 .alive = mmc_alive,
2182 .shutdown = mmc_shutdown,
2183 .hw_reset = _mmc_hw_reset,
2184};
2185
2186
2187
2188
2189int mmc_attach_mmc(struct mmc_host *host)
2190{
2191 int err;
2192 u32 ocr, rocr;
2193
2194 WARN_ON(!host->claimed);
2195
2196
2197 if (!mmc_host_is_spi(host))
2198 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2199
2200 err = mmc_send_op_cond(host, 0, &ocr);
2201 if (err)
2202 return err;
2203
2204 mmc_attach_bus(host, &mmc_ops);
2205 if (host->ocr_avail_mmc)
2206 host->ocr_avail = host->ocr_avail_mmc;
2207
2208
2209
2210
2211 if (mmc_host_is_spi(host)) {
2212 err = mmc_spi_read_ocr(host, 1, &ocr);
2213 if (err)
2214 goto err;
2215 }
2216
2217 rocr = mmc_select_voltage(host, ocr);
2218
2219
2220
2221
2222 if (!rocr) {
2223 err = -EINVAL;
2224 goto err;
2225 }
2226
2227
2228
2229
2230 err = mmc_init_card(host, rocr, NULL);
2231 if (err)
2232 goto err;
2233
2234 mmc_release_host(host);
2235 err = mmc_add_card(host->card);
2236 if (err)
2237 goto remove_card;
2238
2239 mmc_claim_host(host);
2240 return 0;
2241
2242remove_card:
2243 mmc_remove_card(host->card);
2244 mmc_claim_host(host);
2245 host->card = NULL;
2246err:
2247 mmc_detach_bus(host);
2248
2249 pr_err("%s: error %d whilst initialising MMC card\n",
2250 mmc_hostname(host), err);
2251
2252 return err;
2253}
2254