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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / mmc / core / mmc.c
blob6a23be214543db1189722e2ca2f1f1a7d1bdc9a9
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/mmc/core/mmc.c
4 *
5 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
6 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
7 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
8 */
9
10 #include <linux/err.h>
11 #include <linux/of.h>
12 #include <linux/slab.h>
13 #include <linux/stat.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/random.h>
16 #include <linux/sysfs.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 "card.h"
24 #include "host.h"
25 #include "bus.h"
26 #include "mmc_ops.h"
27 #include "quirks.h"
28 #include "sd_ops.h"
29 #include "pwrseq.h"
30
31 #define DEFAULT_CMD6_TIMEOUT_MS 500
32 #define MIN_CACHE_EN_TIMEOUT_MS 1600
33 #define CACHE_FLUSH_TIMEOUT_MS 30000 /* 30s */
34
35 static const unsigned int tran_exp[] = {
36 10000, 100000, 1000000, 10000000,
37 0, 0, 0, 0
38 };
39
40 static 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
45 static const unsigned int taac_exp[] = {
46 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
47 };
48
49 static 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 /*
55 * Given the decoded CSD structure, decode the raw CID to our CID structure.
56 */
57 static int mmc_decode_cid(struct mmc_card *card)
58 {
59 u32 *resp = card->raw_cid;
60
61 /*
62 * Add the raw card ID (cid) data to the entropy pool. It doesn't
63 * matter that not all of it is unique, it's just bonus entropy.
64 */
65 add_device_randomness(&card->raw_cid, sizeof(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
115 static 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 static void mmc_set_wp_grp_size(struct mmc_card *card)
127 {
128 if (card->ext_csd.erase_group_def & 1)
129 card->wp_grp_size = card->ext_csd.hc_erase_size *
130 card->ext_csd.raw_hc_erase_gap_size;
131 else
132 card->wp_grp_size = card->csd.erase_size *
133 (card->csd.wp_grp_size + 1);
134 }
135
136 /*
137 * Given a 128-bit response, decode to our card CSD structure.
138 */
139 static int mmc_decode_csd(struct mmc_card *card)
140 {
141 struct mmc_csd *csd = &card->csd;
142 unsigned int e, m, a, b;
143 u32 *resp = card->raw_csd;
144
145 /*
146 * We only understand CSD structure v1.1 and v1.2.
147 * v1.2 has extra information in bits 15, 11 and 10.
148 * We also support eMMC v4.4 & v4.41.
149 */
150 csd->structure = unstuff_bits(resp, 126, 2);
151 if (csd->structure == 0) {
152 pr_err("%s: unrecognised CSD structure version %d\n",
153 mmc_hostname(card->host), csd->structure);
154 return -EINVAL;
155 }
156
157 csd->mmca_vsn = unstuff_bits(resp, 122, 4);
158 m = unstuff_bits(resp, 115, 4);
159 e = unstuff_bits(resp, 112, 3);
160 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
161 csd->taac_clks = unstuff_bits(resp, 104, 8) * 100;
162
163 m = unstuff_bits(resp, 99, 4);
164 e = unstuff_bits(resp, 96, 3);
165 csd->max_dtr = tran_exp[e] * tran_mant[m];
166 csd->cmdclass = unstuff_bits(resp, 84, 12);
167
168 e = unstuff_bits(resp, 47, 3);
169 m = unstuff_bits(resp, 62, 12);
170 csd->capacity = (1 + m) << (e + 2);
171
172 csd->read_blkbits = unstuff_bits(resp, 80, 4);
173 csd->read_partial = unstuff_bits(resp, 79, 1);
174 csd->write_misalign = unstuff_bits(resp, 78, 1);
175 csd->read_misalign = unstuff_bits(resp, 77, 1);
176 csd->dsr_imp = unstuff_bits(resp, 76, 1);
177 csd->r2w_factor = unstuff_bits(resp, 26, 3);
178 csd->write_blkbits = unstuff_bits(resp, 22, 4);
179 csd->write_partial = unstuff_bits(resp, 21, 1);
180
181 if (csd->write_blkbits >= 9) {
182 a = unstuff_bits(resp, 42, 5);
183 b = unstuff_bits(resp, 37, 5);
184 csd->erase_size = (a + 1) * (b + 1);
185 csd->erase_size <<= csd->write_blkbits - 9;
186 csd->wp_grp_size = unstuff_bits(resp, 32, 5);
187 }
188
189 return 0;
190 }
191
192 static void mmc_select_card_type(struct mmc_card *card)
193 {
194 struct mmc_host *host = card->host;
195 u8 card_type = card->ext_csd.raw_card_type;
196 u32 caps = host->caps, caps2 = host->caps2;
197 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
198 unsigned int avail_type = 0;
199
200 if (caps & MMC_CAP_MMC_HIGHSPEED &&
201 card_type & EXT_CSD_CARD_TYPE_HS_26) {
202 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
203 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
204 }
205
206 if (caps & MMC_CAP_MMC_HIGHSPEED &&
207 card_type & EXT_CSD_CARD_TYPE_HS_52) {
208 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
209 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
210 }
211
212 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
213 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
214 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
215 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
216 }
217
218 if (caps & MMC_CAP_1_2V_DDR &&
219 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
220 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
221 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
222 }
223
224 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
225 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
226 hs200_max_dtr = MMC_HS200_MAX_DTR;
227 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
228 }
229
230 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
231 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
232 hs200_max_dtr = MMC_HS200_MAX_DTR;
233 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
234 }
235
236 if (caps2 & MMC_CAP2_HS400_1_8V &&
237 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
238 hs200_max_dtr = MMC_HS200_MAX_DTR;
239 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
240 }
241
242 if (caps2 & MMC_CAP2_HS400_1_2V &&
243 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
244 hs200_max_dtr = MMC_HS200_MAX_DTR;
245 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
246 }
247
248 if ((caps2 & MMC_CAP2_HS400_ES) &&
249 card->ext_csd.strobe_support &&
250 (avail_type & EXT_CSD_CARD_TYPE_HS400))
251 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
252
253 card->ext_csd.hs_max_dtr = hs_max_dtr;
254 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
255 card->mmc_avail_type = avail_type;
256 }
257
258 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
259 {
260 u8 hc_erase_grp_sz, hc_wp_grp_sz;
261
262 /*
263 * Disable these attributes by default
264 */
265 card->ext_csd.enhanced_area_offset = -EINVAL;
266 card->ext_csd.enhanced_area_size = -EINVAL;
267
268 /*
269 * Enhanced area feature support -- check whether the eMMC
270 * card has the Enhanced area enabled. If so, export enhanced
271 * area offset and size to user by adding sysfs interface.
272 */
273 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
274 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
275 if (card->ext_csd.partition_setting_completed) {
276 hc_erase_grp_sz =
277 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
278 hc_wp_grp_sz =
279 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
280
281 /*
282 * calculate the enhanced data area offset, in bytes
283 */
284 card->ext_csd.enhanced_area_offset =
285 (((unsigned long long)ext_csd[139]) << 24) +
286 (((unsigned long long)ext_csd[138]) << 16) +
287 (((unsigned long long)ext_csd[137]) << 8) +
288 (((unsigned long long)ext_csd[136]));
289 if (mmc_card_blockaddr(card))
290 card->ext_csd.enhanced_area_offset <<= 9;
291 /*
292 * calculate the enhanced data area size, in kilobytes
293 */
294 card->ext_csd.enhanced_area_size =
295 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
296 ext_csd[140];
297 card->ext_csd.enhanced_area_size *=
298 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
299 card->ext_csd.enhanced_area_size <<= 9;
300 } else {
301 pr_warn("%s: defines enhanced area without partition setting complete\n",
302 mmc_hostname(card->host));
303 }
304 }
305 }
306
307 static void mmc_part_add(struct mmc_card *card, u64 size,
308 unsigned int part_cfg, char *name, int idx, bool ro,
309 int area_type)
310 {
311 card->part[card->nr_parts].size = size;
312 card->part[card->nr_parts].part_cfg = part_cfg;
313 sprintf(card->part[card->nr_parts].name, name, idx);
314 card->part[card->nr_parts].force_ro = ro;
315 card->part[card->nr_parts].area_type = area_type;
316 card->nr_parts++;
317 }
318
319 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
320 {
321 int idx;
322 u8 hc_erase_grp_sz, hc_wp_grp_sz;
323 u64 part_size;
324
325 /*
326 * General purpose partition feature support --
327 * If ext_csd has the size of general purpose partitions,
328 * set size, part_cfg, partition name in mmc_part.
329 */
330 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
331 EXT_CSD_PART_SUPPORT_PART_EN) {
332 hc_erase_grp_sz =
333 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
334 hc_wp_grp_sz =
335 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
336
337 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
338 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
339 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
340 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
341 continue;
342 if (card->ext_csd.partition_setting_completed == 0) {
343 pr_warn("%s: has partition size defined without partition complete\n",
344 mmc_hostname(card->host));
345 break;
346 }
347 part_size =
348 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
349 << 16) +
350 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
351 << 8) +
352 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
353 part_size *= (hc_erase_grp_sz * hc_wp_grp_sz);
354 mmc_part_add(card, part_size << 19,
355 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
356 "gp%d", idx, false,
357 MMC_BLK_DATA_AREA_GP);
358 }
359 }
360 }
361
362 /* Minimum partition switch timeout in milliseconds */
363 #define MMC_MIN_PART_SWITCH_TIME 300
364
365 /*
366 * Decode extended CSD.
367 */
368 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
369 {
370 int err = 0, idx;
371 u64 part_size;
372 struct device_node *np;
373 bool broken_hpi = false;
374
375 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
376 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
377 if (card->csd.structure == 3) {
378 if (card->ext_csd.raw_ext_csd_structure > 2) {
379 pr_err("%s: unrecognised EXT_CSD structure "
380 "version %d\n", mmc_hostname(card->host),
381 card->ext_csd.raw_ext_csd_structure);
382 err = -EINVAL;
383 goto out;
384 }
385 }
386
387 np = mmc_of_find_child_device(card->host, 0);
388 if (np && of_device_is_compatible(np, "mmc-card"))
389 broken_hpi = of_property_read_bool(np, "broken-hpi");
390 of_node_put(np);
391
392 /*
393 * The EXT_CSD format is meant to be forward compatible. As long
394 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
395 * are authorized, see JEDEC JESD84-B50 section B.8.
396 */
397 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
398
399 /* fixup device after ext_csd revision field is updated */
400 mmc_fixup_device(card, mmc_ext_csd_fixups);
401
402 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
403 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
404 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
405 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
406 if (card->ext_csd.rev >= 2) {
407 card->ext_csd.sectors =
408 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
409 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
410 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
411 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
412
413 /* Cards with density > 2GiB are sector addressed */
414 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
415 mmc_card_set_blockaddr(card);
416 }
417
418 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
419 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
420
421 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
422 card->ext_csd.raw_erase_timeout_mult =
423 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
424 card->ext_csd.raw_hc_erase_grp_size =
425 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
426 card->ext_csd.raw_boot_mult =
427 ext_csd[EXT_CSD_BOOT_MULT];
428 if (card->ext_csd.rev >= 3) {
429 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
430 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
431
432 /* EXT_CSD value is in units of 10ms, but we store in ms */
433 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
434
435 /* Sleep / awake timeout in 100ns units */
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 * There are two boot regions of equal size, defined in
450 * multiples of 128K.
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 * Note that the call to mmc_part_add above defaults to read
497 * only. If this default assumption is changed, the call must
498 * take into account the value of boot_locked below.
499 */
500 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
501 card->ext_csd.boot_ro_lockable = true;
502
503 /* Save power class values */
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 /* Adjust production date as per JEDEC JESD84-B451 */
526 if (card->cid.year < 2010)
527 card->cid.year += 16;
528
529 /* check whether the eMMC card supports BKOPS */
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 /* check whether the eMMC card supports HPI */
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 * Indicate the maximum timeout to close
558 * a command interrupted by HPI
559 */
560 card->ext_csd.out_of_int_time =
561 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
562 }
563
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 * RPMB regions are defined in multiples of 128K.
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 /* eMMC v4.5 or later */
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 } else {
615 card->ext_csd.data_sector_size = 512;
616 }
617
618 /*
619 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
620 * when accessing a specific field", so use it here if there is no
621 * PARTITION_SWITCH_TIME.
622 */
623 if (!card->ext_csd.part_time)
624 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
625 /* Some eMMC set the value too low so set a minimum */
626 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
627 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
628
629 /* eMMC v5 or later */
630 if (card->ext_csd.rev >= 7) {
631 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
632 MMC_FIRMWARE_LEN);
633 card->ext_csd.ffu_capable =
634 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
635 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
636
637 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
638 card->ext_csd.device_life_time_est_typ_a =
639 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
640 card->ext_csd.device_life_time_est_typ_b =
641 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
642 }
643
644 /* eMMC v5.1 or later */
645 if (card->ext_csd.rev >= 8) {
646 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
647 EXT_CSD_CMDQ_SUPPORTED;
648 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
649 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
650 /* Exclude inefficiently small queue depths */
651 if (card->ext_csd.cmdq_depth <= 2) {
652 card->ext_csd.cmdq_support = false;
653 card->ext_csd.cmdq_depth = 0;
654 }
655 if (card->ext_csd.cmdq_support) {
656 pr_debug("%s: Command Queue supported depth %u\n",
657 mmc_hostname(card->host),
658 card->ext_csd.cmdq_depth);
659 }
660 card->ext_csd.enhanced_rpmb_supported =
661 (card->ext_csd.rel_param &
662 EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR);
663 }
664 out:
665 return err;
666 }
667
668 static int mmc_read_ext_csd(struct mmc_card *card)
669 {
670 u8 *ext_csd;
671 int err;
672
673 if (!mmc_can_ext_csd(card))
674 return 0;
675
676 err = mmc_get_ext_csd(card, &ext_csd);
677 if (err) {
678 /* If the host or the card can't do the switch,
679 * fail more gracefully. */
680 if ((err != -EINVAL)
681 && (err != -ENOSYS)
682 && (err != -EFAULT))
683 return err;
684
685 /*
686 * High capacity cards should have this "magic" size
687 * stored in their CSD.
688 */
689 if (card->csd.capacity == (4096 * 512)) {
690 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
691 mmc_hostname(card->host));
692 } else {
693 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
694 mmc_hostname(card->host));
695 err = 0;
696 }
697
698 return err;
699 }
700
701 err = mmc_decode_ext_csd(card, ext_csd);
702 kfree(ext_csd);
703 return err;
704 }
705
706 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
707 {
708 u8 *bw_ext_csd;
709 int err;
710
711 if (bus_width == MMC_BUS_WIDTH_1)
712 return 0;
713
714 err = mmc_get_ext_csd(card, &bw_ext_csd);
715 if (err)
716 return err;
717
718 /* only compare read only fields */
719 err = !((card->ext_csd.raw_partition_support ==
720 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
721 (card->ext_csd.raw_erased_mem_count ==
722 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
723 (card->ext_csd.rev ==
724 bw_ext_csd[EXT_CSD_REV]) &&
725 (card->ext_csd.raw_ext_csd_structure ==
726 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
727 (card->ext_csd.raw_card_type ==
728 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
729 (card->ext_csd.raw_s_a_timeout ==
730 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
731 (card->ext_csd.raw_hc_erase_gap_size ==
732 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
733 (card->ext_csd.raw_erase_timeout_mult ==
734 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
735 (card->ext_csd.raw_hc_erase_grp_size ==
736 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
737 (card->ext_csd.raw_sec_trim_mult ==
738 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
739 (card->ext_csd.raw_sec_erase_mult ==
740 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
741 (card->ext_csd.raw_sec_feature_support ==
742 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
743 (card->ext_csd.raw_trim_mult ==
744 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
745 (card->ext_csd.raw_sectors[0] ==
746 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
747 (card->ext_csd.raw_sectors[1] ==
748 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
749 (card->ext_csd.raw_sectors[2] ==
750 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
751 (card->ext_csd.raw_sectors[3] ==
752 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
753 (card->ext_csd.raw_pwr_cl_52_195 ==
754 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
755 (card->ext_csd.raw_pwr_cl_26_195 ==
756 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
757 (card->ext_csd.raw_pwr_cl_52_360 ==
758 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
759 (card->ext_csd.raw_pwr_cl_26_360 ==
760 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
761 (card->ext_csd.raw_pwr_cl_200_195 ==
762 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
763 (card->ext_csd.raw_pwr_cl_200_360 ==
764 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
765 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
766 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
767 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
768 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
769 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
770 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
771
772 if (err)
773 err = -EINVAL;
774
775 kfree(bw_ext_csd);
776 return err;
777 }
778
779 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
780 card->raw_cid[2], card->raw_cid[3]);
781 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
782 card->raw_csd[2], card->raw_csd[3]);
783 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
784 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
785 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
786 MMC_DEV_ATTR(wp_grp_size, "%u\n", card->wp_grp_size << 9);
787 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
788 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
789 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
790 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
791 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
792 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
793 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
794 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
795 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
796 card->ext_csd.device_life_time_est_typ_a,
797 card->ext_csd.device_life_time_est_typ_b);
798 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
799 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
800 card->ext_csd.enhanced_area_offset);
801 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
802 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
803 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n",
804 card->ext_csd.enhanced_rpmb_supported);
805 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
806 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
807 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
808 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
809
810 static ssize_t mmc_fwrev_show(struct device *dev,
811 struct device_attribute *attr,
812 char *buf)
813 {
814 struct mmc_card *card = mmc_dev_to_card(dev);
815
816 if (card->ext_csd.rev < 7)
817 return sysfs_emit(buf, "0x%x\n", card->cid.fwrev);
818 else
819 return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
820 card->ext_csd.fwrev);
821 }
822
823 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
824
825 static ssize_t mmc_dsr_show(struct device *dev,
826 struct device_attribute *attr,
827 char *buf)
828 {
829 struct mmc_card *card = mmc_dev_to_card(dev);
830 struct mmc_host *host = card->host;
831
832 if (card->csd.dsr_imp && host->dsr_req)
833 return sysfs_emit(buf, "0x%x\n", host->dsr);
834 else
835 /* return default DSR value */
836 return sysfs_emit(buf, "0x%x\n", 0x404);
837 }
838
839 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
840
841 static struct attribute *mmc_std_attrs[] = {
842 &dev_attr_cid.attr,
843 &dev_attr_csd.attr,
844 &dev_attr_date.attr,
845 &dev_attr_erase_size.attr,
846 &dev_attr_preferred_erase_size.attr,
847 &dev_attr_wp_grp_size.attr,
848 &dev_attr_fwrev.attr,
849 &dev_attr_ffu_capable.attr,
850 &dev_attr_hwrev.attr,
851 &dev_attr_manfid.attr,
852 &dev_attr_name.attr,
853 &dev_attr_oemid.attr,
854 &dev_attr_prv.attr,
855 &dev_attr_rev.attr,
856 &dev_attr_pre_eol_info.attr,
857 &dev_attr_life_time.attr,
858 &dev_attr_serial.attr,
859 &dev_attr_enhanced_area_offset.attr,
860 &dev_attr_enhanced_area_size.attr,
861 &dev_attr_raw_rpmb_size_mult.attr,
862 &dev_attr_enhanced_rpmb_supported.attr,
863 &dev_attr_rel_sectors.attr,
864 &dev_attr_ocr.attr,
865 &dev_attr_rca.attr,
866 &dev_attr_dsr.attr,
867 &dev_attr_cmdq_en.attr,
868 NULL,
869 };
870 ATTRIBUTE_GROUPS(mmc_std);
871
872 static const struct device_type mmc_type = {
873 .groups = mmc_std_groups,
874 };
875
876 /*
877 * Select the PowerClass for the current bus width
878 * If power class is defined for 4/8 bit bus in the
879 * extended CSD register, select it by executing the
880 * mmc_switch command.
881 */
882 static int __mmc_select_powerclass(struct mmc_card *card,
883 unsigned int bus_width)
884 {
885 struct mmc_host *host = card->host;
886 struct mmc_ext_csd *ext_csd = &card->ext_csd;
887 unsigned int pwrclass_val = 0;
888 int err = 0;
889
890 switch (1 << host->ios.vdd) {
891 case MMC_VDD_165_195:
892 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
893 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
894 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
895 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
896 ext_csd->raw_pwr_cl_52_195 :
897 ext_csd->raw_pwr_cl_ddr_52_195;
898 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
899 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
900 break;
901 case MMC_VDD_27_28:
902 case MMC_VDD_28_29:
903 case MMC_VDD_29_30:
904 case MMC_VDD_30_31:
905 case MMC_VDD_31_32:
906 case MMC_VDD_32_33:
907 case MMC_VDD_33_34:
908 case MMC_VDD_34_35:
909 case MMC_VDD_35_36:
910 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
911 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
912 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
913 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
914 ext_csd->raw_pwr_cl_52_360 :
915 ext_csd->raw_pwr_cl_ddr_52_360;
916 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
917 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
918 ext_csd->raw_pwr_cl_ddr_200_360 :
919 ext_csd->raw_pwr_cl_200_360;
920 break;
921 default:
922 pr_warn("%s: Voltage range not supported for power class\n",
923 mmc_hostname(host));
924 return -EINVAL;
925 }
926
927 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
928 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
929 EXT_CSD_PWR_CL_8BIT_SHIFT;
930 else
931 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
932 EXT_CSD_PWR_CL_4BIT_SHIFT;
933
934 /* If the power class is different from the default value */
935 if (pwrclass_val > 0) {
936 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
937 EXT_CSD_POWER_CLASS,
938 pwrclass_val,
939 card->ext_csd.generic_cmd6_time);
940 }
941
942 return err;
943 }
944
945 static int mmc_select_powerclass(struct mmc_card *card)
946 {
947 struct mmc_host *host = card->host;
948 u32 bus_width, ext_csd_bits;
949 int err, ddr;
950
951 /* Power class selection is supported for versions >= 4.0 */
952 if (!mmc_can_ext_csd(card))
953 return 0;
954
955 bus_width = host->ios.bus_width;
956 /* Power class values are defined only for 4/8 bit bus */
957 if (bus_width == MMC_BUS_WIDTH_1)
958 return 0;
959
960 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
961 if (ddr)
962 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
963 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
964 else
965 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
966 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
967
968 err = __mmc_select_powerclass(card, ext_csd_bits);
969 if (err)
970 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
971 mmc_hostname(host), 1 << bus_width, ddr);
972
973 return err;
974 }
975
976 /*
977 * Set the bus speed for the selected speed mode.
978 */
979 static void mmc_set_bus_speed(struct mmc_card *card)
980 {
981 unsigned int max_dtr = (unsigned int)-1;
982
983 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
984 max_dtr > card->ext_csd.hs200_max_dtr)
985 max_dtr = card->ext_csd.hs200_max_dtr;
986 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
987 max_dtr = card->ext_csd.hs_max_dtr;
988 else if (max_dtr > card->csd.max_dtr)
989 max_dtr = card->csd.max_dtr;
990
991 mmc_set_clock(card->host, max_dtr);
992 }
993
994 /*
995 * Select the bus width amoung 4-bit and 8-bit(SDR).
996 * If the bus width is changed successfully, return the selected width value.
997 * Zero is returned instead of error value if the wide width is not supported.
998 */
999 static int mmc_select_bus_width(struct mmc_card *card)
1000 {
1001 static unsigned ext_csd_bits[] = {
1002 EXT_CSD_BUS_WIDTH_8,
1003 EXT_CSD_BUS_WIDTH_4,
1004 EXT_CSD_BUS_WIDTH_1,
1005 };
1006 static unsigned bus_widths[] = {
1007 MMC_BUS_WIDTH_8,
1008 MMC_BUS_WIDTH_4,
1009 MMC_BUS_WIDTH_1,
1010 };
1011 struct mmc_host *host = card->host;
1012 unsigned idx, bus_width = 0;
1013 int err = 0;
1014
1015 if (!mmc_can_ext_csd(card) ||
1016 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1017 return 0;
1018
1019 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1020
1021 /*
1022 * Unlike SD, MMC cards dont have a configuration register to notify
1023 * supported bus width. So bus test command should be run to identify
1024 * the supported bus width or compare the ext csd values of current
1025 * bus width and ext csd values of 1 bit mode read earlier.
1026 */
1027 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1028 /*
1029 * Host is capable of 8bit transfer, then switch
1030 * the device to work in 8bit transfer mode. If the
1031 * mmc switch command returns error then switch to
1032 * 4bit transfer mode. On success set the corresponding
1033 * bus width on the host.
1034 */
1035 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1036 EXT_CSD_BUS_WIDTH,
1037 ext_csd_bits[idx],
1038 card->ext_csd.generic_cmd6_time);
1039 if (err)
1040 continue;
1041
1042 bus_width = bus_widths[idx];
1043 mmc_set_bus_width(host, bus_width);
1044
1045 /*
1046 * If controller can't handle bus width test,
1047 * compare ext_csd previously read in 1 bit mode
1048 * against ext_csd at new bus width
1049 */
1050 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1051 err = mmc_compare_ext_csds(card, bus_width);
1052 else
1053 err = mmc_bus_test(card, bus_width);
1054
1055 if (!err) {
1056 err = bus_width;
1057 break;
1058 } else {
1059 pr_warn("%s: switch to bus width %d failed\n",
1060 mmc_hostname(host), 1 << bus_width);
1061 }
1062 }
1063
1064 return err;
1065 }
1066
1067 /*
1068 * Switch to the high-speed mode
1069 */
1070 static int mmc_select_hs(struct mmc_card *card)
1071 {
1072 int err;
1073
1074 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1075 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1076 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1077 true, true, MMC_CMD_RETRIES);
1078 if (err)
1079 pr_warn("%s: switch to high-speed failed, err:%d\n",
1080 mmc_hostname(card->host), err);
1081
1082 return err;
1083 }
1084
1085 /*
1086 * Activate wide bus and DDR if supported.
1087 */
1088 static int mmc_select_hs_ddr(struct mmc_card *card)
1089 {
1090 struct mmc_host *host = card->host;
1091 u32 bus_width, ext_csd_bits;
1092 int err = 0;
1093
1094 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1095 return 0;
1096
1097 bus_width = host->ios.bus_width;
1098 if (bus_width == MMC_BUS_WIDTH_1)
1099 return 0;
1100
1101 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1102 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1103
1104 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1105 EXT_CSD_BUS_WIDTH,
1106 ext_csd_bits,
1107 card->ext_csd.generic_cmd6_time,
1108 MMC_TIMING_MMC_DDR52,
1109 true, true, MMC_CMD_RETRIES);
1110 if (err) {
1111 pr_err("%s: switch to bus width %d ddr failed\n",
1112 mmc_hostname(host), 1 << bus_width);
1113 return err;
1114 }
1115
1116 /*
1117 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1118 * signaling.
1119 *
1120 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1121 *
1122 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1123 * in the JEDEC spec for DDR.
1124 *
1125 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1126 * host controller can support this, like some of the SDHCI
1127 * controller which connect to an eMMC device. Some of these
1128 * host controller still needs to use 1.8v vccq for supporting
1129 * DDR mode.
1130 *
1131 * So the sequence will be:
1132 * if (host and device can both support 1.2v IO)
1133 * use 1.2v IO;
1134 * else if (host and device can both support 1.8v IO)
1135 * use 1.8v IO;
1136 * so if host and device can only support 3.3v IO, this is the
1137 * last choice.
1138 *
1139 * WARNING: eMMC rules are NOT the same as SD DDR
1140 */
1141 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1142 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1143 if (!err)
1144 return 0;
1145 }
1146
1147 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1148 host->caps & MMC_CAP_1_8V_DDR)
1149 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1150
1151 /* make sure vccq is 3.3v after switching disaster */
1152 if (err)
1153 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1154
1155 return err;
1156 }
1157
1158 static int mmc_select_hs400(struct mmc_card *card)
1159 {
1160 struct mmc_host *host = card->host;
1161 unsigned int max_dtr;
1162 int err = 0;
1163 u8 val;
1164
1165 /*
1166 * HS400 mode requires 8-bit bus width
1167 */
1168 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1169 host->ios.bus_width == MMC_BUS_WIDTH_8))
1170 return 0;
1171
1172 /* Switch card to HS mode */
1173 val = EXT_CSD_TIMING_HS;
1174 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1175 EXT_CSD_HS_TIMING, val,
1176 card->ext_csd.generic_cmd6_time, 0,
1177 false, true, MMC_CMD_RETRIES);
1178 if (err) {
1179 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1180 mmc_hostname(host), err);
1181 return err;
1182 }
1183
1184 /* Prepare host to downgrade to HS timing */
1185 if (host->ops->hs400_downgrade)
1186 host->ops->hs400_downgrade(host);
1187
1188 /* Set host controller to HS timing */
1189 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1190
1191 /* Reduce frequency to HS frequency */
1192 max_dtr = card->ext_csd.hs_max_dtr;
1193 mmc_set_clock(host, max_dtr);
1194
1195 err = mmc_switch_status(card, true);
1196 if (err)
1197 goto out_err;
1198
1199 if (host->ops->hs400_prepare_ddr)
1200 host->ops->hs400_prepare_ddr(host);
1201
1202 /* Switch card to DDR */
1203 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1204 EXT_CSD_BUS_WIDTH,
1205 EXT_CSD_DDR_BUS_WIDTH_8,
1206 card->ext_csd.generic_cmd6_time);
1207 if (err) {
1208 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1209 mmc_hostname(host), err);
1210 return err;
1211 }
1212
1213 /* Switch card to HS400 */
1214 val = EXT_CSD_TIMING_HS400 |
1215 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1216 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1217 EXT_CSD_HS_TIMING, val,
1218 card->ext_csd.generic_cmd6_time, 0,
1219 false, true, MMC_CMD_RETRIES);
1220 if (err) {
1221 pr_err("%s: switch to hs400 failed, err:%d\n",
1222 mmc_hostname(host), err);
1223 return err;
1224 }
1225
1226 /* Set host controller to HS400 timing and frequency */
1227 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1228 mmc_set_bus_speed(card);
1229
1230 if (host->ops->execute_hs400_tuning) {
1231 mmc_retune_disable(host);
1232 err = host->ops->execute_hs400_tuning(host, card);
1233 mmc_retune_enable(host);
1234 if (err)
1235 goto out_err;
1236 }
1237
1238 if (host->ops->hs400_complete)
1239 host->ops->hs400_complete(host);
1240
1241 err = mmc_switch_status(card, true);
1242 if (err)
1243 goto out_err;
1244
1245 return 0;
1246
1247 out_err:
1248 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1249 __func__, err);
1250 return err;
1251 }
1252
1253 int mmc_hs200_to_hs400(struct mmc_card *card)
1254 {
1255 return mmc_select_hs400(card);
1256 }
1257
1258 int mmc_hs400_to_hs200(struct mmc_card *card)
1259 {
1260 struct mmc_host *host = card->host;
1261 unsigned int max_dtr;
1262 int err;
1263 u8 val;
1264
1265 /* Reduce frequency to HS */
1266 max_dtr = card->ext_csd.hs_max_dtr;
1267 mmc_set_clock(host, max_dtr);
1268
1269 /* Switch HS400 to HS DDR */
1270 val = EXT_CSD_TIMING_HS;
1271 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1272 val, card->ext_csd.generic_cmd6_time, 0,
1273 false, true, MMC_CMD_RETRIES);
1274 if (err)
1275 goto out_err;
1276
1277 if (host->ops->hs400_downgrade)
1278 host->ops->hs400_downgrade(host);
1279
1280 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1281
1282 err = mmc_switch_status(card, true);
1283 if (err)
1284 goto out_err;
1285
1286 /* Switch HS DDR to HS */
1287 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1288 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1289 0, false, true, MMC_CMD_RETRIES);
1290 if (err)
1291 goto out_err;
1292
1293 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1294
1295 err = mmc_switch_status(card, true);
1296 if (err)
1297 goto out_err;
1298
1299 /* Switch HS to HS200 */
1300 val = EXT_CSD_TIMING_HS200 |
1301 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1302 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1303 val, card->ext_csd.generic_cmd6_time, 0,
1304 false, true, MMC_CMD_RETRIES);
1305 if (err)
1306 goto out_err;
1307
1308 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1309
1310 /*
1311 * For HS200, CRC errors are not a reliable way to know the switch
1312 * failed. If there really is a problem, we would expect tuning will
1313 * fail and the result ends up the same.
1314 */
1315 err = mmc_switch_status(card, false);
1316 if (err)
1317 goto out_err;
1318
1319 mmc_set_bus_speed(card);
1320
1321 /* Prepare tuning for HS400 mode. */
1322 if (host->ops->prepare_hs400_tuning)
1323 host->ops->prepare_hs400_tuning(host, &host->ios);
1324
1325 return 0;
1326
1327 out_err:
1328 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1329 __func__, err);
1330 return err;
1331 }
1332
1333 static void mmc_select_driver_type(struct mmc_card *card)
1334 {
1335 int card_drv_type, drive_strength, drv_type = 0;
1336 int fixed_drv_type = card->host->fixed_drv_type;
1337
1338 card_drv_type = card->ext_csd.raw_driver_strength |
1339 mmc_driver_type_mask(0);
1340
1341 if (fixed_drv_type >= 0)
1342 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1343 ? fixed_drv_type : 0;
1344 else
1345 drive_strength = mmc_select_drive_strength(card,
1346 card->ext_csd.hs200_max_dtr,
1347 card_drv_type, &drv_type);
1348
1349 card->drive_strength = drive_strength;
1350
1351 if (drv_type)
1352 mmc_set_driver_type(card->host, drv_type);
1353 }
1354
1355 static int mmc_select_hs400es(struct mmc_card *card)
1356 {
1357 struct mmc_host *host = card->host;
1358 int err = -EINVAL;
1359 u8 val;
1360
1361 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1362 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1363
1364 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1365 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1366
1367 /* If fails try again during next card power cycle */
1368 if (err)
1369 goto out_err;
1370
1371 err = mmc_select_bus_width(card);
1372 if (err != MMC_BUS_WIDTH_8) {
1373 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1374 mmc_hostname(host), err);
1375 err = err < 0 ? err : -ENOTSUPP;
1376 goto out_err;
1377 }
1378
1379 /* Switch card to HS mode */
1380 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1381 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1382 card->ext_csd.generic_cmd6_time, 0,
1383 false, true, MMC_CMD_RETRIES);
1384 if (err) {
1385 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1386 mmc_hostname(host), err);
1387 goto out_err;
1388 }
1389
1390 /*
1391 * Bump to HS timing and frequency. Some cards don't handle
1392 * SEND_STATUS reliably at the initial frequency.
1393 */
1394 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1395 mmc_set_bus_speed(card);
1396
1397 err = mmc_switch_status(card, true);
1398 if (err)
1399 goto out_err;
1400
1401 /* Switch card to DDR with strobe bit */
1402 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1403 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1404 EXT_CSD_BUS_WIDTH,
1405 val,
1406 card->ext_csd.generic_cmd6_time);
1407 if (err) {
1408 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1409 mmc_hostname(host), err);
1410 goto out_err;
1411 }
1412
1413 mmc_select_driver_type(card);
1414
1415 /* Switch card to HS400 */
1416 val = EXT_CSD_TIMING_HS400 |
1417 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1418 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1419 EXT_CSD_HS_TIMING, val,
1420 card->ext_csd.generic_cmd6_time, 0,
1421 false, true, MMC_CMD_RETRIES);
1422 if (err) {
1423 pr_err("%s: switch to hs400es failed, err:%d\n",
1424 mmc_hostname(host), err);
1425 goto out_err;
1426 }
1427
1428 /* Set host controller to HS400 timing and frequency */
1429 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1430
1431 /* Controller enable enhanced strobe function */
1432 host->ios.enhanced_strobe = true;
1433 if (host->ops->hs400_enhanced_strobe)
1434 host->ops->hs400_enhanced_strobe(host, &host->ios);
1435
1436 err = mmc_switch_status(card, true);
1437 if (err)
1438 goto out_err;
1439
1440 return 0;
1441
1442 out_err:
1443 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1444 __func__, err);
1445 return err;
1446 }
1447
1448 /*
1449 * For device supporting HS200 mode, the following sequence
1450 * should be done before executing the tuning process.
1451 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1452 * 2. switch to HS200 mode
1453 * 3. set the clock to > 52Mhz and <=200MHz
1454 */
1455 static int mmc_select_hs200(struct mmc_card *card)
1456 {
1457 struct mmc_host *host = card->host;
1458 unsigned int old_timing, old_signal_voltage, old_clock;
1459 int err = -EINVAL;
1460 u8 val;
1461
1462 old_signal_voltage = host->ios.signal_voltage;
1463 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1464 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1465
1466 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1467 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1468
1469 /* If fails try again during next card power cycle */
1470 if (err)
1471 return err;
1472
1473 mmc_select_driver_type(card);
1474
1475 /*
1476 * Set the bus width(4 or 8) with host's support and
1477 * switch to HS200 mode if bus width is set successfully.
1478 */
1479 err = mmc_select_bus_width(card);
1480 if (err > 0) {
1481 val = EXT_CSD_TIMING_HS200 |
1482 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1483 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1484 EXT_CSD_HS_TIMING, val,
1485 card->ext_csd.generic_cmd6_time, 0,
1486 false, true, MMC_CMD_RETRIES);
1487 if (err)
1488 goto err;
1489
1490 /*
1491 * Bump to HS timing and frequency. Some cards don't handle
1492 * SEND_STATUS reliably at the initial frequency.
1493 * NB: We can't move to full (HS200) speeds until after we've
1494 * successfully switched over.
1495 */
1496 old_timing = host->ios.timing;
1497 old_clock = host->ios.clock;
1498 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1499 mmc_set_clock(card->host, card->ext_csd.hs_max_dtr);
1500
1501 /*
1502 * For HS200, CRC errors are not a reliable way to know the
1503 * switch failed. If there really is a problem, we would expect
1504 * tuning will fail and the result ends up the same.
1505 */
1506 err = mmc_switch_status(card, false);
1507
1508 /*
1509 * mmc_select_timing() assumes timing has not changed if
1510 * it is a switch error.
1511 */
1512 if (err == -EBADMSG) {
1513 mmc_set_clock(host, old_clock);
1514 mmc_set_timing(host, old_timing);
1515 }
1516 }
1517 err:
1518 if (err) {
1519 /* fall back to the old signal voltage, if fails report error */
1520 if (mmc_set_signal_voltage(host, old_signal_voltage))
1521 err = -EIO;
1522
1523 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1524 __func__, err);
1525 }
1526 return err;
1527 }
1528
1529 /*
1530 * Activate High Speed, HS200 or HS400ES mode if supported.
1531 */
1532 static int mmc_select_timing(struct mmc_card *card)
1533 {
1534 int err = 0;
1535
1536 if (!mmc_can_ext_csd(card))
1537 goto bus_speed;
1538
1539 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
1540 err = mmc_select_hs400es(card);
1541 goto out;
1542 }
1543
1544 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) {
1545 err = mmc_select_hs200(card);
1546 if (err == -EBADMSG)
1547 card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200;
1548 else
1549 goto out;
1550 }
1551
1552 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1553 err = mmc_select_hs(card);
1554
1555 out:
1556 if (err && err != -EBADMSG)
1557 return err;
1558
1559 bus_speed:
1560 /*
1561 * Set the bus speed to the selected bus timing.
1562 * If timing is not selected, backward compatible is the default.
1563 */
1564 mmc_set_bus_speed(card);
1565 return 0;
1566 }
1567
1568 /*
1569 * Execute tuning sequence to seek the proper bus operating
1570 * conditions for HS200 and HS400, which sends CMD21 to the device.
1571 */
1572 static int mmc_hs200_tuning(struct mmc_card *card)
1573 {
1574 struct mmc_host *host = card->host;
1575
1576 /*
1577 * Timing should be adjusted to the HS400 target
1578 * operation frequency for tuning process
1579 */
1580 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1581 host->ios.bus_width == MMC_BUS_WIDTH_8)
1582 if (host->ops->prepare_hs400_tuning)
1583 host->ops->prepare_hs400_tuning(host, &host->ios);
1584
1585 return mmc_execute_tuning(card);
1586 }
1587
1588 /*
1589 * Handle the detection and initialisation of a card.
1590 *
1591 * In the case of a resume, "oldcard" will contain the card
1592 * we're trying to reinitialise.
1593 */
1594 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1595 struct mmc_card *oldcard)
1596 {
1597 struct mmc_card *card;
1598 int err;
1599 u32 cid[4];
1600 u32 rocr;
1601
1602 WARN_ON(!host->claimed);
1603
1604 /* Set correct bus mode for MMC before attempting init */
1605 if (!mmc_host_is_spi(host))
1606 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1607
1608 /*
1609 * Since we're changing the OCR value, we seem to
1610 * need to tell some cards to go back to the idle
1611 * state. We wait 1ms to give cards time to
1612 * respond.
1613 * mmc_go_idle is needed for eMMC that are asleep
1614 */
1615 mmc_go_idle(host);
1616
1617 /* The extra bit indicates that we support high capacity */
1618 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1619 if (err)
1620 goto err;
1621
1622 /*
1623 * For SPI, enable CRC as appropriate.
1624 */
1625 if (mmc_host_is_spi(host)) {
1626 err = mmc_spi_set_crc(host, use_spi_crc);
1627 if (err)
1628 goto err;
1629 }
1630
1631 /*
1632 * Fetch CID from card.
1633 */
1634 err = mmc_send_cid(host, cid);
1635 if (err)
1636 goto err;
1637
1638 if (oldcard) {
1639 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1640 pr_debug("%s: Perhaps the card was replaced\n",
1641 mmc_hostname(host));
1642 err = -ENOENT;
1643 goto err;
1644 }
1645
1646 card = oldcard;
1647 } else {
1648 /*
1649 * Allocate card structure.
1650 */
1651 card = mmc_alloc_card(host, &mmc_type);
1652 if (IS_ERR(card)) {
1653 err = PTR_ERR(card);
1654 goto err;
1655 }
1656
1657 card->ocr = ocr;
1658 card->type = MMC_TYPE_MMC;
1659 card->rca = 1;
1660 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1661 }
1662
1663 /*
1664 * Call the optional HC's init_card function to handle quirks.
1665 */
1666 if (host->ops->init_card)
1667 host->ops->init_card(host, card);
1668
1669 /*
1670 * For native busses: set card RCA and quit open drain mode.
1671 */
1672 if (!mmc_host_is_spi(host)) {
1673 err = mmc_set_relative_addr(card);
1674 if (err)
1675 goto free_card;
1676
1677 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1678 }
1679
1680 if (!oldcard) {
1681 /*
1682 * Fetch CSD from card.
1683 */
1684 err = mmc_send_csd(card, card->raw_csd);
1685 if (err)
1686 goto free_card;
1687
1688 err = mmc_decode_csd(card);
1689 if (err)
1690 goto free_card;
1691 err = mmc_decode_cid(card);
1692 if (err)
1693 goto free_card;
1694 }
1695
1696 /*
1697 * handling only for cards supporting DSR and hosts requesting
1698 * DSR configuration
1699 */
1700 if (card->csd.dsr_imp && host->dsr_req)
1701 mmc_set_dsr(host);
1702
1703 /*
1704 * Select card, as all following commands rely on that.
1705 */
1706 if (!mmc_host_is_spi(host)) {
1707 err = mmc_select_card(card);
1708 if (err)
1709 goto free_card;
1710 }
1711
1712 if (!oldcard) {
1713 /* Read extended CSD. */
1714 err = mmc_read_ext_csd(card);
1715 if (err)
1716 goto free_card;
1717
1718 /*
1719 * If doing byte addressing, check if required to do sector
1720 * addressing. Handle the case of <2GB cards needing sector
1721 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1722 * ocr register has bit 30 set for sector addressing.
1723 */
1724 if (rocr & BIT(30))
1725 mmc_card_set_blockaddr(card);
1726
1727 /* Erase size depends on CSD and Extended CSD */
1728 mmc_set_erase_size(card);
1729 }
1730
1731 /*
1732 * Reselect the card type since host caps could have been changed when
1733 * debugging even if the card is not new.
1734 */
1735 mmc_select_card_type(card);
1736
1737 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1738 if (card->ext_csd.rev >= 3) {
1739 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1740 EXT_CSD_ERASE_GROUP_DEF, 1,
1741 card->ext_csd.generic_cmd6_time);
1742
1743 if (err && err != -EBADMSG)
1744 goto free_card;
1745
1746 if (err) {
1747 /*
1748 * Just disable enhanced area off & sz
1749 * will try to enable ERASE_GROUP_DEF
1750 * during next time reinit
1751 */
1752 card->ext_csd.enhanced_area_offset = -EINVAL;
1753 card->ext_csd.enhanced_area_size = -EINVAL;
1754 } else {
1755 card->ext_csd.erase_group_def = 1;
1756 /*
1757 * enable ERASE_GRP_DEF successfully.
1758 * This will affect the erase size, so
1759 * here need to reset erase size
1760 */
1761 mmc_set_erase_size(card);
1762 }
1763 }
1764 mmc_set_wp_grp_size(card);
1765 /*
1766 * Ensure eMMC user default partition is enabled
1767 */
1768 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1769 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1770 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1771 card->ext_csd.part_config,
1772 card->ext_csd.part_time);
1773 if (err && err != -EBADMSG)
1774 goto free_card;
1775 }
1776
1777 /*
1778 * Enable power_off_notification byte in the ext_csd register
1779 */
1780 if (card->ext_csd.rev >= 6) {
1781 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1782 EXT_CSD_POWER_OFF_NOTIFICATION,
1783 EXT_CSD_POWER_ON,
1784 card->ext_csd.generic_cmd6_time);
1785 if (err && err != -EBADMSG)
1786 goto free_card;
1787
1788 /*
1789 * The err can be -EBADMSG or 0,
1790 * so check for success and update the flag
1791 */
1792 if (!err)
1793 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1794 }
1795
1796 /* set erase_arg */
1797 if (mmc_can_discard(card))
1798 card->erase_arg = MMC_DISCARD_ARG;
1799 else if (mmc_can_trim(card))
1800 card->erase_arg = MMC_TRIM_ARG;
1801 else
1802 card->erase_arg = MMC_ERASE_ARG;
1803
1804 /*
1805 * Select timing interface
1806 */
1807 err = mmc_select_timing(card);
1808 if (err)
1809 goto free_card;
1810
1811 if (mmc_card_hs200(card)) {
1812 host->doing_init_tune = 1;
1813
1814 err = mmc_hs200_tuning(card);
1815 if (!err)
1816 err = mmc_select_hs400(card);
1817
1818 host->doing_init_tune = 0;
1819
1820 if (err)
1821 goto free_card;
1822 } else if (mmc_card_hs400es(card)) {
1823 if (host->ops->execute_hs400_tuning) {
1824 err = host->ops->execute_hs400_tuning(host, card);
1825 if (err)
1826 goto free_card;
1827 }
1828 } else {
1829 /* Select the desired bus width optionally */
1830 err = mmc_select_bus_width(card);
1831 if (err > 0 && mmc_card_hs(card)) {
1832 err = mmc_select_hs_ddr(card);
1833 if (err)
1834 goto free_card;
1835 }
1836 }
1837
1838 /*
1839 * Choose the power class with selected bus interface
1840 */
1841 mmc_select_powerclass(card);
1842
1843 /*
1844 * Enable HPI feature (if supported)
1845 */
1846 if (card->ext_csd.hpi) {
1847 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1848 EXT_CSD_HPI_MGMT, 1,
1849 card->ext_csd.generic_cmd6_time);
1850 if (err && err != -EBADMSG)
1851 goto free_card;
1852 if (err) {
1853 pr_warn("%s: Enabling HPI failed\n",
1854 mmc_hostname(card->host));
1855 card->ext_csd.hpi_en = 0;
1856 } else {
1857 card->ext_csd.hpi_en = 1;
1858 }
1859 }
1860
1861 /*
1862 * If cache size is higher than 0, this indicates the existence of cache
1863 * and it can be turned on. Note that some eMMCs from Micron has been
1864 * reported to need ~800 ms timeout, while enabling the cache after
1865 * sudden power failure tests. Let's extend the timeout to a minimum of
1866 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1867 */
1868 if (card->ext_csd.cache_size > 0) {
1869 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1870
1871 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1872 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1873 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1874 if (err && err != -EBADMSG)
1875 goto free_card;
1876
1877 /*
1878 * Only if no error, cache is turned on successfully.
1879 */
1880 if (err) {
1881 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1882 mmc_hostname(card->host), err);
1883 card->ext_csd.cache_ctrl = 0;
1884 } else {
1885 card->ext_csd.cache_ctrl = 1;
1886 }
1887 }
1888
1889 /*
1890 * Enable Command Queue if supported. Note that Packed Commands cannot
1891 * be used with Command Queue.
1892 */
1893 card->ext_csd.cmdq_en = false;
1894 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1895 err = mmc_cmdq_enable(card);
1896 if (err && err != -EBADMSG)
1897 goto free_card;
1898 if (err) {
1899 pr_warn("%s: Enabling CMDQ failed\n",
1900 mmc_hostname(card->host));
1901 card->ext_csd.cmdq_support = false;
1902 card->ext_csd.cmdq_depth = 0;
1903 }
1904 }
1905 /*
1906 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1907 * disabled for a time, so a flag is needed to indicate to re-enable the
1908 * Command Queue.
1909 */
1910 card->reenable_cmdq = card->ext_csd.cmdq_en;
1911
1912 if (host->cqe_ops && !host->cqe_enabled) {
1913 err = host->cqe_ops->cqe_enable(host, card);
1914 if (!err) {
1915 host->cqe_enabled = true;
1916
1917 if (card->ext_csd.cmdq_en) {
1918 pr_info("%s: Command Queue Engine enabled\n",
1919 mmc_hostname(host));
1920 } else {
1921 host->hsq_enabled = true;
1922 pr_info("%s: Host Software Queue enabled\n",
1923 mmc_hostname(host));
1924 }
1925 }
1926 }
1927
1928 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1929 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1930 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1931 mmc_hostname(host));
1932 err = -EINVAL;
1933 goto free_card;
1934 }
1935
1936 if (!oldcard)
1937 host->card = card;
1938
1939 return 0;
1940
1941 free_card:
1942 if (!oldcard)
1943 mmc_remove_card(card);
1944 err:
1945 return err;
1946 }
1947
1948 static int mmc_can_sleep(struct mmc_card *card)
1949 {
1950 return card->ext_csd.rev >= 3;
1951 }
1952
1953 static int mmc_sleep_busy_cb(void *cb_data, bool *busy)
1954 {
1955 struct mmc_host *host = cb_data;
1956
1957 *busy = host->ops->card_busy(host);
1958 return 0;
1959 }
1960
1961 static int mmc_sleep(struct mmc_host *host)
1962 {
1963 struct mmc_command cmd = {};
1964 struct mmc_card *card = host->card;
1965 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1966 bool use_r1b_resp;
1967 int err;
1968
1969 /* Re-tuning can't be done once the card is deselected */
1970 mmc_retune_hold(host);
1971
1972 err = mmc_deselect_cards(host);
1973 if (err)
1974 goto out_release;
1975
1976 cmd.opcode = MMC_SLEEP_AWAKE;
1977 cmd.arg = card->rca << 16;
1978 cmd.arg |= 1 << 15;
1979 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
1980
1981 err = mmc_wait_for_cmd(host, &cmd, 0);
1982 if (err)
1983 goto out_release;
1984
1985 /*
1986 * If the host does not wait while the card signals busy, then we can
1987 * try to poll, but only if the host supports HW polling, as the
1988 * SEND_STATUS cmd is not allowed. If we can't poll, then we simply need
1989 * to wait the sleep/awake timeout.
1990 */
1991 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
1992 goto out_release;
1993
1994 if (!host->ops->card_busy) {
1995 mmc_delay(timeout_ms);
1996 goto out_release;
1997 }
1998
1999 err = __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_sleep_busy_cb, host);
2000
2001 out_release:
2002 mmc_retune_release(host);
2003 return err;
2004 }
2005
2006 static int mmc_can_poweroff_notify(const struct mmc_card *card)
2007 {
2008 return card &&
2009 mmc_card_mmc(card) &&
2010 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
2011 }
2012
2013 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
2014 {
2015 unsigned int timeout = card->ext_csd.generic_cmd6_time;
2016 int err;
2017
2018 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
2019 if (notify_type == EXT_CSD_POWER_OFF_LONG)
2020 timeout = card->ext_csd.power_off_longtime;
2021
2022 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
2023 EXT_CSD_POWER_OFF_NOTIFICATION,
2024 notify_type, timeout, 0, false, false, MMC_CMD_RETRIES);
2025 if (err)
2026 pr_err("%s: Power Off Notification timed out, %u\n",
2027 mmc_hostname(card->host), timeout);
2028
2029 /* Disable the power off notification after the switch operation. */
2030 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
2031
2032 return err;
2033 }
2034
2035 /*
2036 * Host is being removed. Free up the current card.
2037 */
2038 static void mmc_remove(struct mmc_host *host)
2039 {
2040 mmc_remove_card(host->card);
2041 host->card = NULL;
2042 }
2043
2044 /*
2045 * Card detection - card is alive.
2046 */
2047 static int mmc_alive(struct mmc_host *host)
2048 {
2049 return mmc_send_status(host->card, NULL);
2050 }
2051
2052 /*
2053 * Card detection callback from host.
2054 */
2055 static void mmc_detect(struct mmc_host *host)
2056 {
2057 int err;
2058
2059 mmc_get_card(host->card, NULL);
2060
2061 /*
2062 * Just check if our card has been removed.
2063 */
2064 err = _mmc_detect_card_removed(host);
2065
2066 mmc_put_card(host->card, NULL);
2067
2068 if (err) {
2069 mmc_remove(host);
2070
2071 mmc_claim_host(host);
2072 mmc_detach_bus(host);
2073 mmc_power_off(host);
2074 mmc_release_host(host);
2075 }
2076 }
2077
2078 static bool _mmc_cache_enabled(struct mmc_host *host)
2079 {
2080 return host->card->ext_csd.cache_size > 0 &&
2081 host->card->ext_csd.cache_ctrl & 1;
2082 }
2083
2084 /*
2085 * Flush the internal cache of the eMMC to non-volatile storage.
2086 */
2087 static int _mmc_flush_cache(struct mmc_host *host)
2088 {
2089 int err = 0;
2090
2091 if (mmc_card_broken_cache_flush(host->card) && !host->card->written_flag)
2092 return 0;
2093
2094 if (_mmc_cache_enabled(host)) {
2095 err = mmc_switch(host->card, EXT_CSD_CMD_SET_NORMAL,
2096 EXT_CSD_FLUSH_CACHE, 1,
2097 CACHE_FLUSH_TIMEOUT_MS);
2098 if (err)
2099 pr_err("%s: cache flush error %d\n", mmc_hostname(host), err);
2100 else
2101 host->card->written_flag = false;
2102 }
2103
2104 return err;
2105 }
2106
2107 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2108 {
2109 int err = 0;
2110 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2111 EXT_CSD_POWER_OFF_LONG;
2112
2113 mmc_claim_host(host);
2114
2115 if (mmc_card_suspended(host->card))
2116 goto out;
2117
2118 err = _mmc_flush_cache(host);
2119 if (err)
2120 goto out;
2121
2122 if (mmc_can_poweroff_notify(host->card) &&
2123 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend ||
2124 (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND)))
2125 err = mmc_poweroff_notify(host->card, notify_type);
2126 else if (mmc_can_sleep(host->card))
2127 err = mmc_sleep(host);
2128 else if (!mmc_host_is_spi(host))
2129 err = mmc_deselect_cards(host);
2130
2131 if (!err) {
2132 mmc_power_off(host);
2133 mmc_card_set_suspended(host->card);
2134 }
2135 out:
2136 mmc_release_host(host);
2137 return err;
2138 }
2139
2140 /*
2141 * Suspend callback
2142 */
2143 static int mmc_suspend(struct mmc_host *host)
2144 {
2145 int err;
2146
2147 err = _mmc_suspend(host, true);
2148 if (!err) {
2149 pm_runtime_disable(&host->card->dev);
2150 pm_runtime_set_suspended(&host->card->dev);
2151 }
2152
2153 return err;
2154 }
2155
2156 /*
2157 * This function tries to determine if the same card is still present
2158 * and, if so, restore all state to it.
2159 */
2160 static int _mmc_resume(struct mmc_host *host)
2161 {
2162 int err = 0;
2163
2164 mmc_claim_host(host);
2165
2166 if (!mmc_card_suspended(host->card))
2167 goto out;
2168
2169 mmc_power_up(host, host->card->ocr);
2170 err = mmc_init_card(host, host->card->ocr, host->card);
2171 mmc_card_clr_suspended(host->card);
2172
2173 out:
2174 mmc_release_host(host);
2175 return err;
2176 }
2177
2178 /*
2179 * Shutdown callback
2180 */
2181 static int mmc_shutdown(struct mmc_host *host)
2182 {
2183 int err = 0;
2184
2185 /*
2186 * In a specific case for poweroff notify, we need to resume the card
2187 * before we can shutdown it properly.
2188 */
2189 if (mmc_can_poweroff_notify(host->card) &&
2190 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2191 err = _mmc_resume(host);
2192
2193 if (!err)
2194 err = _mmc_suspend(host, false);
2195
2196 return err;
2197 }
2198
2199 /*
2200 * Callback for resume.
2201 */
2202 static int mmc_resume(struct mmc_host *host)
2203 {
2204 pm_runtime_enable(&host->card->dev);
2205 return 0;
2206 }
2207
2208 /*
2209 * Callback for runtime_suspend.
2210 */
2211 static int mmc_runtime_suspend(struct mmc_host *host)
2212 {
2213 int err;
2214
2215 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2216 return 0;
2217
2218 err = _mmc_suspend(host, true);
2219 if (err)
2220 pr_err("%s: error %d doing aggressive suspend\n",
2221 mmc_hostname(host), err);
2222
2223 return err;
2224 }
2225
2226 /*
2227 * Callback for runtime_resume.
2228 */
2229 static int mmc_runtime_resume(struct mmc_host *host)
2230 {
2231 int err;
2232
2233 err = _mmc_resume(host);
2234 if (err && err != -ENOMEDIUM)
2235 pr_err("%s: error %d doing runtime resume\n",
2236 mmc_hostname(host), err);
2237
2238 return 0;
2239 }
2240
2241 static int mmc_can_reset(struct mmc_card *card)
2242 {
2243 u8 rst_n_function;
2244
2245 rst_n_function = card->ext_csd.rst_n_function;
2246 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2247 return 0;
2248 return 1;
2249 }
2250
2251 static int _mmc_hw_reset(struct mmc_host *host)
2252 {
2253 struct mmc_card *card = host->card;
2254
2255 /*
2256 * In the case of recovery, we can't expect flushing the cache to work
2257 * always, but we have a go and ignore errors.
2258 */
2259 _mmc_flush_cache(host);
2260
2261 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->card_hw_reset &&
2262 mmc_can_reset(card)) {
2263 /* If the card accept RST_n signal, send it. */
2264 mmc_set_clock(host, host->f_init);
2265 host->ops->card_hw_reset(host);
2266 /* Set initial state and call mmc_set_ios */
2267 mmc_set_initial_state(host);
2268 } else {
2269 /* Do a brute force power cycle */
2270 mmc_power_cycle(host, card->ocr);
2271 mmc_pwrseq_reset(host);
2272 }
2273 return mmc_init_card(host, card->ocr, card);
2274 }
2275
2276 static const struct mmc_bus_ops mmc_ops = {
2277 .remove = mmc_remove,
2278 .detect = mmc_detect,
2279 .suspend = mmc_suspend,
2280 .resume = mmc_resume,
2281 .runtime_suspend = mmc_runtime_suspend,
2282 .runtime_resume = mmc_runtime_resume,
2283 .alive = mmc_alive,
2284 .shutdown = mmc_shutdown,
2285 .hw_reset = _mmc_hw_reset,
2286 .cache_enabled = _mmc_cache_enabled,
2287 .flush_cache = _mmc_flush_cache,
2288 };
2289
2290 /*
2291 * Starting point for MMC card init.
2292 */
2293 int mmc_attach_mmc(struct mmc_host *host)
2294 {
2295 int err;
2296 u32 ocr, rocr;
2297
2298 WARN_ON(!host->claimed);
2299
2300 /* Set correct bus mode for MMC before attempting attach */
2301 if (!mmc_host_is_spi(host))
2302 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2303
2304 err = mmc_send_op_cond(host, 0, &ocr);
2305 if (err)
2306 return err;
2307
2308 mmc_attach_bus(host, &mmc_ops);
2309 if (host->ocr_avail_mmc)
2310 host->ocr_avail = host->ocr_avail_mmc;
2311
2312 /*
2313 * We need to get OCR a different way for SPI.
2314 */
2315 if (mmc_host_is_spi(host)) {
2316 err = mmc_spi_read_ocr(host, 1, &ocr);
2317 if (err)
2318 goto err;
2319 }
2320
2321 rocr = mmc_select_voltage(host, ocr);
2322
2323 /*
2324 * Can we support the voltage of the card?
2325 */
2326 if (!rocr) {
2327 err = -EINVAL;
2328 goto err;
2329 }
2330
2331 /*
2332 * Detect and init the card.
2333 */
2334 err = mmc_init_card(host, rocr, NULL);
2335 if (err)
2336 goto err;
2337
2338 mmc_release_host(host);
2339 err = mmc_add_card(host->card);
2340 if (err)
2341 goto remove_card;
2342
2343 mmc_claim_host(host);
2344 return 0;
2345
2346 remove_card:
2347 mmc_remove_card(host->card);
2348 mmc_claim_host(host);
2349 host->card = NULL;
2350 err:
2351 mmc_detach_bus(host);
2352
2353 pr_err("%s: error %d whilst initialising MMC card\n",
2354 mmc_hostname(host), err);
2355
2356 return err;
2357 }
Kernel DRM miscellaneous fixes and cross-tree changes