]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - drivers/mmc/core/mmc.c
projects / mirror_ubuntu-focal-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
UBUNTU: Ubuntu-5.4.0-117.132
[mirror_ubuntu-focal-kernel.git] / drivers / mmc / core / mmc.c
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
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
19
20 #include "core.h"
21 #include "card.h"
22 #include "host.h"
23 #include "bus.h"
24 #include "mmc_ops.h"
25 #include "quirks.h"
26 #include "sd_ops.h"
27 #include "pwrseq.h"
28
29 #define DEFAULT_CMD6_TIMEOUT_MS 500
30 #define MIN_CACHE_EN_TIMEOUT_MS 1600
31
32 static const unsigned int tran_exp[] = {
33 10000, 100000, 1000000, 10000000,
34 0, 0, 0, 0
35 };
36
37 static const unsigned char tran_mant[] = {
38 0, 10, 12, 13, 15, 20, 25, 30,
39 35, 40, 45, 50, 55, 60, 70, 80,
40 };
41
42 static const unsigned int taac_exp[] = {
43 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
44 };
45
46 static const unsigned int taac_mant[] = {
47 0, 10, 12, 13, 15, 20, 25, 30,
48 35, 40, 45, 50, 55, 60, 70, 80,
49 };
50
51 #define UNSTUFF_BITS(resp,start,size) \
52 ({ \
53 const int __size = size; \
54 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
55 const int __off = 3 - ((start) / 32); \
56 const int __shft = (start) & 31; \
57 u32 __res; \
58 \
59 __res = resp[__off] >> __shft; \
60 if (__size + __shft > 32) \
61 __res |= resp[__off-1] << ((32 - __shft) % 32); \
62 __res & __mask; \
63 })
64
65 /*
66 * Given the decoded CSD structure, decode the raw CID to our CID structure.
67 */
68 static int mmc_decode_cid(struct mmc_card *card)
69 {
70 u32 *resp = card->raw_cid;
71
72 /*
73 * The selection of the format here is based upon published
74 * specs from sandisk and from what people have reported.
75 */
76 switch (card->csd.mmca_vsn) {
77 case 0: /* MMC v1.0 - v1.2 */
78 case 1: /* MMC v1.4 */
79 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
80 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
81 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
82 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
83 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
84 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
85 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
86 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
87 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
88 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
89 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
90 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
91 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
92 break;
93
94 case 2: /* MMC v2.0 - v2.2 */
95 case 3: /* MMC v3.1 - v3.3 */
96 case 4: /* MMC v4 */
97 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
98 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
99 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
100 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
101 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
102 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
103 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
104 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
105 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
106 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
107 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
108 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
109 break;
110
111 default:
112 pr_err("%s: card has unknown MMCA version %d\n",
113 mmc_hostname(card->host), card->csd.mmca_vsn);
114 return -EINVAL;
115 }
116
117 return 0;
118 }
119
120 static void mmc_set_erase_size(struct mmc_card *card)
121 {
122 if (card->ext_csd.erase_group_def & 1)
123 card->erase_size = card->ext_csd.hc_erase_size;
124 else
125 card->erase_size = card->csd.erase_size;
126
127 mmc_init_erase(card);
128 }
129
130 /*
131 * Given a 128-bit response, decode to our card CSD structure.
132 */
133 static int mmc_decode_csd(struct mmc_card *card)
134 {
135 struct mmc_csd *csd = &card->csd;
136 unsigned int e, m, a, b;
137 u32 *resp = card->raw_csd;
138
139 /*
140 * We only understand CSD structure v1.1 and v1.2.
141 * v1.2 has extra information in bits 15, 11 and 10.
142 * We also support eMMC v4.4 & v4.41.
143 */
144 csd->structure = UNSTUFF_BITS(resp, 126, 2);
145 if (csd->structure == 0) {
146 pr_err("%s: unrecognised CSD structure version %d\n",
147 mmc_hostname(card->host), csd->structure);
148 return -EINVAL;
149 }
150
151 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
152 m = UNSTUFF_BITS(resp, 115, 4);
153 e = UNSTUFF_BITS(resp, 112, 3);
154 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
155 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
156
157 m = UNSTUFF_BITS(resp, 99, 4);
158 e = UNSTUFF_BITS(resp, 96, 3);
159 csd->max_dtr = tran_exp[e] * tran_mant[m];
160 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
161
162 e = UNSTUFF_BITS(resp, 47, 3);
163 m = UNSTUFF_BITS(resp, 62, 12);
164 csd->capacity = (1 + m) << (e + 2);
165
166 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
167 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
168 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
169 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
170 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
171 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
172 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
173 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
174
175 if (csd->write_blkbits >= 9) {
176 a = UNSTUFF_BITS(resp, 42, 5);
177 b = UNSTUFF_BITS(resp, 37, 5);
178 csd->erase_size = (a + 1) * (b + 1);
179 csd->erase_size <<= csd->write_blkbits - 9;
180 }
181
182 return 0;
183 }
184
185 static void mmc_select_card_type(struct mmc_card *card)
186 {
187 struct mmc_host *host = card->host;
188 u8 card_type = card->ext_csd.raw_card_type;
189 u32 caps = host->caps, caps2 = host->caps2;
190 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
191 unsigned int avail_type = 0;
192
193 if (caps & MMC_CAP_MMC_HIGHSPEED &&
194 card_type & EXT_CSD_CARD_TYPE_HS_26) {
195 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
196 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
197 }
198
199 if (caps & MMC_CAP_MMC_HIGHSPEED &&
200 card_type & EXT_CSD_CARD_TYPE_HS_52) {
201 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
202 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
203 }
204
205 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
206 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
207 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
208 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
209 }
210
211 if (caps & MMC_CAP_1_2V_DDR &&
212 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
213 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
214 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
215 }
216
217 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
218 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
219 hs200_max_dtr = MMC_HS200_MAX_DTR;
220 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
221 }
222
223 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
224 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
225 hs200_max_dtr = MMC_HS200_MAX_DTR;
226 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
227 }
228
229 if (caps2 & MMC_CAP2_HS400_1_8V &&
230 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
231 hs200_max_dtr = MMC_HS200_MAX_DTR;
232 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
233 }
234
235 if (caps2 & MMC_CAP2_HS400_1_2V &&
236 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
237 hs200_max_dtr = MMC_HS200_MAX_DTR;
238 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
239 }
240
241 if ((caps2 & MMC_CAP2_HS400_ES) &&
242 card->ext_csd.strobe_support &&
243 (avail_type & EXT_CSD_CARD_TYPE_HS400))
244 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
245
246 card->ext_csd.hs_max_dtr = hs_max_dtr;
247 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
248 card->mmc_avail_type = avail_type;
249 }
250
251 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
252 {
253 u8 hc_erase_grp_sz, hc_wp_grp_sz;
254
255 /*
256 * Disable these attributes by default
257 */
258 card->ext_csd.enhanced_area_offset = -EINVAL;
259 card->ext_csd.enhanced_area_size = -EINVAL;
260
261 /*
262 * Enhanced area feature support -- check whether the eMMC
263 * card has the Enhanced area enabled. If so, export enhanced
264 * area offset and size to user by adding sysfs interface.
265 */
266 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
267 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
268 if (card->ext_csd.partition_setting_completed) {
269 hc_erase_grp_sz =
270 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
271 hc_wp_grp_sz =
272 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
273
274 /*
275 * calculate the enhanced data area offset, in bytes
276 */
277 card->ext_csd.enhanced_area_offset =
278 (((unsigned long long)ext_csd[139]) << 24) +
279 (((unsigned long long)ext_csd[138]) << 16) +
280 (((unsigned long long)ext_csd[137]) << 8) +
281 (((unsigned long long)ext_csd[136]));
282 if (mmc_card_blockaddr(card))
283 card->ext_csd.enhanced_area_offset <<= 9;
284 /*
285 * calculate the enhanced data area size, in kilobytes
286 */
287 card->ext_csd.enhanced_area_size =
288 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
289 ext_csd[140];
290 card->ext_csd.enhanced_area_size *=
291 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
292 card->ext_csd.enhanced_area_size <<= 9;
293 } else {
294 pr_warn("%s: defines enhanced area without partition setting complete\n",
295 mmc_hostname(card->host));
296 }
297 }
298 }
299
300 static void mmc_part_add(struct mmc_card *card, u64 size,
301 unsigned int part_cfg, char *name, int idx, bool ro,
302 int area_type)
303 {
304 card->part[card->nr_parts].size = size;
305 card->part[card->nr_parts].part_cfg = part_cfg;
306 sprintf(card->part[card->nr_parts].name, name, idx);
307 card->part[card->nr_parts].force_ro = ro;
308 card->part[card->nr_parts].area_type = area_type;
309 card->nr_parts++;
310 }
311
312 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
313 {
314 int idx;
315 u8 hc_erase_grp_sz, hc_wp_grp_sz;
316 u64 part_size;
317
318 /*
319 * General purpose partition feature support --
320 * If ext_csd has the size of general purpose partitions,
321 * set size, part_cfg, partition name in mmc_part.
322 */
323 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
324 EXT_CSD_PART_SUPPORT_PART_EN) {
325 hc_erase_grp_sz =
326 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
327 hc_wp_grp_sz =
328 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
329
330 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
331 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
332 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
333 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
334 continue;
335 if (card->ext_csd.partition_setting_completed == 0) {
336 pr_warn("%s: has partition size defined without partition complete\n",
337 mmc_hostname(card->host));
338 break;
339 }
340 part_size =
341 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
342 << 16) +
343 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
344 << 8) +
345 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
346 part_size *= (hc_erase_grp_sz * hc_wp_grp_sz);
347 mmc_part_add(card, part_size << 19,
348 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
349 "gp%d", idx, false,
350 MMC_BLK_DATA_AREA_GP);
351 }
352 }
353 }
354
355 /* Minimum partition switch timeout in milliseconds */
356 #define MMC_MIN_PART_SWITCH_TIME 300
357
358 /*
359 * Decode extended CSD.
360 */
361 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
362 {
363 int err = 0, idx;
364 u64 part_size;
365 struct device_node *np;
366 bool broken_hpi = false;
367
368 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
369 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
370 if (card->csd.structure == 3) {
371 if (card->ext_csd.raw_ext_csd_structure > 2) {
372 pr_err("%s: unrecognised EXT_CSD structure "
373 "version %d\n", mmc_hostname(card->host),
374 card->ext_csd.raw_ext_csd_structure);
375 err = -EINVAL;
376 goto out;
377 }
378 }
379
380 np = mmc_of_find_child_device(card->host, 0);
381 if (np && of_device_is_compatible(np, "mmc-card"))
382 broken_hpi = of_property_read_bool(np, "broken-hpi");
383 of_node_put(np);
384
385 /*
386 * The EXT_CSD format is meant to be forward compatible. As long
387 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
388 * are authorized, see JEDEC JESD84-B50 section B.8.
389 */
390 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
391
392 /* fixup device after ext_csd revision field is updated */
393 mmc_fixup_device(card, mmc_ext_csd_fixups);
394
395 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
396 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
397 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
398 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
399 if (card->ext_csd.rev >= 2) {
400 card->ext_csd.sectors =
401 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
402 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
403 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
404 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
405
406 /* Cards with density > 2GiB are sector addressed */
407 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
408 mmc_card_set_blockaddr(card);
409 }
410
411 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
412 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
413 mmc_select_card_type(card);
414
415 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
416 card->ext_csd.raw_erase_timeout_mult =
417 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
418 card->ext_csd.raw_hc_erase_grp_size =
419 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
420 if (card->ext_csd.rev >= 3) {
421 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
422 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
423
424 /* EXT_CSD value is in units of 10ms, but we store in ms */
425 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
426
427 /* Sleep / awake timeout in 100ns units */
428 if (sa_shift > 0 && sa_shift <= 0x17)
429 card->ext_csd.sa_timeout =
430 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
431 card->ext_csd.erase_group_def =
432 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
433 card->ext_csd.hc_erase_timeout = 300 *
434 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
435 card->ext_csd.hc_erase_size =
436 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
437
438 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
439
440 /*
441 * There are two boot regions of equal size, defined in
442 * multiples of 128K.
443 */
444 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
445 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
446 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
447 mmc_part_add(card, part_size,
448 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
449 "boot%d", idx, true,
450 MMC_BLK_DATA_AREA_BOOT);
451 }
452 }
453 }
454
455 card->ext_csd.raw_hc_erase_gap_size =
456 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
457 card->ext_csd.raw_sec_trim_mult =
458 ext_csd[EXT_CSD_SEC_TRIM_MULT];
459 card->ext_csd.raw_sec_erase_mult =
460 ext_csd[EXT_CSD_SEC_ERASE_MULT];
461 card->ext_csd.raw_sec_feature_support =
462 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
463 card->ext_csd.raw_trim_mult =
464 ext_csd[EXT_CSD_TRIM_MULT];
465 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
466 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
467 if (card->ext_csd.rev >= 4) {
468 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
469 EXT_CSD_PART_SETTING_COMPLETED)
470 card->ext_csd.partition_setting_completed = 1;
471 else
472 card->ext_csd.partition_setting_completed = 0;
473
474 mmc_manage_enhanced_area(card, ext_csd);
475
476 mmc_manage_gp_partitions(card, ext_csd);
477
478 card->ext_csd.sec_trim_mult =
479 ext_csd[EXT_CSD_SEC_TRIM_MULT];
480 card->ext_csd.sec_erase_mult =
481 ext_csd[EXT_CSD_SEC_ERASE_MULT];
482 card->ext_csd.sec_feature_support =
483 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
484 card->ext_csd.trim_timeout = 300 *
485 ext_csd[EXT_CSD_TRIM_MULT];
486
487 /*
488 * Note that the call to mmc_part_add above defaults to read
489 * only. If this default assumption is changed, the call must
490 * take into account the value of boot_locked below.
491 */
492 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
493 card->ext_csd.boot_ro_lockable = true;
494
495 /* Save power class values */
496 card->ext_csd.raw_pwr_cl_52_195 =
497 ext_csd[EXT_CSD_PWR_CL_52_195];
498 card->ext_csd.raw_pwr_cl_26_195 =
499 ext_csd[EXT_CSD_PWR_CL_26_195];
500 card->ext_csd.raw_pwr_cl_52_360 =
501 ext_csd[EXT_CSD_PWR_CL_52_360];
502 card->ext_csd.raw_pwr_cl_26_360 =
503 ext_csd[EXT_CSD_PWR_CL_26_360];
504 card->ext_csd.raw_pwr_cl_200_195 =
505 ext_csd[EXT_CSD_PWR_CL_200_195];
506 card->ext_csd.raw_pwr_cl_200_360 =
507 ext_csd[EXT_CSD_PWR_CL_200_360];
508 card->ext_csd.raw_pwr_cl_ddr_52_195 =
509 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
510 card->ext_csd.raw_pwr_cl_ddr_52_360 =
511 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
512 card->ext_csd.raw_pwr_cl_ddr_200_360 =
513 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
514 }
515
516 if (card->ext_csd.rev >= 5) {
517 /* Adjust production date as per JEDEC JESD84-B451 */
518 if (card->cid.year < 2010)
519 card->cid.year += 16;
520
521 /* check whether the eMMC card supports BKOPS */
522 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
523 card->ext_csd.bkops = 1;
524 card->ext_csd.man_bkops_en =
525 (ext_csd[EXT_CSD_BKOPS_EN] &
526 EXT_CSD_MANUAL_BKOPS_MASK);
527 card->ext_csd.raw_bkops_status =
528 ext_csd[EXT_CSD_BKOPS_STATUS];
529 if (card->ext_csd.man_bkops_en)
530 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
531 mmc_hostname(card->host));
532 card->ext_csd.auto_bkops_en =
533 (ext_csd[EXT_CSD_BKOPS_EN] &
534 EXT_CSD_AUTO_BKOPS_MASK);
535 if (card->ext_csd.auto_bkops_en)
536 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
537 mmc_hostname(card->host));
538 }
539
540 /* check whether the eMMC card supports HPI */
541 if (!mmc_card_broken_hpi(card) &&
542 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
543 card->ext_csd.hpi = 1;
544 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
545 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
546 else
547 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
548 /*
549 * Indicate the maximum timeout to close
550 * a command interrupted by HPI
551 */
552 card->ext_csd.out_of_int_time =
553 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
554 }
555
556 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
557 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
558
559 /*
560 * RPMB regions are defined in multiples of 128K.
561 */
562 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
563 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
564 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
565 EXT_CSD_PART_CONFIG_ACC_RPMB,
566 "rpmb", 0, false,
567 MMC_BLK_DATA_AREA_RPMB);
568 }
569 }
570
571 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
572 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
573 card->erased_byte = 0xFF;
574 else
575 card->erased_byte = 0x0;
576
577 /* eMMC v4.5 or later */
578 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
579 if (card->ext_csd.rev >= 6) {
580 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
581
582 card->ext_csd.generic_cmd6_time = 10 *
583 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
584 card->ext_csd.power_off_longtime = 10 *
585 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
586
587 card->ext_csd.cache_size =
588 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
589 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
590 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
591 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
592
593 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
594 card->ext_csd.data_sector_size = 4096;
595 else
596 card->ext_csd.data_sector_size = 512;
597
598 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
599 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
600 card->ext_csd.data_tag_unit_size =
601 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
602 (card->ext_csd.data_sector_size);
603 } else {
604 card->ext_csd.data_tag_unit_size = 0;
605 }
606
607 card->ext_csd.max_packed_writes =
608 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
609 card->ext_csd.max_packed_reads =
610 ext_csd[EXT_CSD_MAX_PACKED_READS];
611 } else {
612 card->ext_csd.data_sector_size = 512;
613 }
614
615 /*
616 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
617 * when accessing a specific field", so use it here if there is no
618 * PARTITION_SWITCH_TIME.
619 */
620 if (!card->ext_csd.part_time)
621 card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
622 /* Some eMMC set the value too low so set a minimum */
623 if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
624 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
625
626 /* eMMC v5 or later */
627 if (card->ext_csd.rev >= 7) {
628 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
629 MMC_FIRMWARE_LEN);
630 card->ext_csd.ffu_capable =
631 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
632 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
633
634 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
635 card->ext_csd.device_life_time_est_typ_a =
636 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
637 card->ext_csd.device_life_time_est_typ_b =
638 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
639 }
640
641 /* eMMC v5.1 or later */
642 if (card->ext_csd.rev >= 8) {
643 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
644 EXT_CSD_CMDQ_SUPPORTED;
645 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
646 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
647 /* Exclude inefficiently small queue depths */
648 if (card->ext_csd.cmdq_depth <= 2) {
649 card->ext_csd.cmdq_support = false;
650 card->ext_csd.cmdq_depth = 0;
651 }
652 if (card->ext_csd.cmdq_support) {
653 pr_debug("%s: Command Queue supported depth %u\n",
654 mmc_hostname(card->host),
655 card->ext_csd.cmdq_depth);
656 }
657 }
658 out:
659 return err;
660 }
661
662 static int mmc_read_ext_csd(struct mmc_card *card)
663 {
664 u8 *ext_csd;
665 int err;
666
667 if (!mmc_can_ext_csd(card))
668 return 0;
669
670 err = mmc_get_ext_csd(card, &ext_csd);
671 if (err) {
672 /* If the host or the card can't do the switch,
673 * fail more gracefully. */
674 if ((err != -EINVAL)
675 && (err != -ENOSYS)
676 && (err != -EFAULT))
677 return err;
678
679 /*
680 * High capacity cards should have this "magic" size
681 * stored in their CSD.
682 */
683 if (card->csd.capacity == (4096 * 512)) {
684 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
685 mmc_hostname(card->host));
686 } else {
687 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
688 mmc_hostname(card->host));
689 err = 0;
690 }
691
692 return err;
693 }
694
695 err = mmc_decode_ext_csd(card, ext_csd);
696 kfree(ext_csd);
697 return err;
698 }
699
700 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
701 {
702 u8 *bw_ext_csd;
703 int err;
704
705 if (bus_width == MMC_BUS_WIDTH_1)
706 return 0;
707
708 err = mmc_get_ext_csd(card, &bw_ext_csd);
709 if (err)
710 return err;
711
712 /* only compare read only fields */
713 err = !((card->ext_csd.raw_partition_support ==
714 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
715 (card->ext_csd.raw_erased_mem_count ==
716 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
717 (card->ext_csd.rev ==
718 bw_ext_csd[EXT_CSD_REV]) &&
719 (card->ext_csd.raw_ext_csd_structure ==
720 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
721 (card->ext_csd.raw_card_type ==
722 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
723 (card->ext_csd.raw_s_a_timeout ==
724 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
725 (card->ext_csd.raw_hc_erase_gap_size ==
726 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
727 (card->ext_csd.raw_erase_timeout_mult ==
728 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
729 (card->ext_csd.raw_hc_erase_grp_size ==
730 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
731 (card->ext_csd.raw_sec_trim_mult ==
732 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
733 (card->ext_csd.raw_sec_erase_mult ==
734 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
735 (card->ext_csd.raw_sec_feature_support ==
736 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
737 (card->ext_csd.raw_trim_mult ==
738 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
739 (card->ext_csd.raw_sectors[0] ==
740 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
741 (card->ext_csd.raw_sectors[1] ==
742 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
743 (card->ext_csd.raw_sectors[2] ==
744 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
745 (card->ext_csd.raw_sectors[3] ==
746 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
747 (card->ext_csd.raw_pwr_cl_52_195 ==
748 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
749 (card->ext_csd.raw_pwr_cl_26_195 ==
750 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
751 (card->ext_csd.raw_pwr_cl_52_360 ==
752 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
753 (card->ext_csd.raw_pwr_cl_26_360 ==
754 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
755 (card->ext_csd.raw_pwr_cl_200_195 ==
756 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
757 (card->ext_csd.raw_pwr_cl_200_360 ==
758 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
759 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
760 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
761 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
762 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
763 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
764 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
765
766 if (err)
767 err = -EINVAL;
768
769 kfree(bw_ext_csd);
770 return err;
771 }
772
773 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
774 card->raw_cid[2], card->raw_cid[3]);
775 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
776 card->raw_csd[2], card->raw_csd[3]);
777 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
778 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
779 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
780 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
781 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
782 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
783 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
784 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
785 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
786 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
787 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
788 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
789 card->ext_csd.device_life_time_est_typ_a,
790 card->ext_csd.device_life_time_est_typ_b);
791 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
792 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
793 card->ext_csd.enhanced_area_offset);
794 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
795 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
796 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
797 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
798 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
799 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
800
801 static ssize_t mmc_fwrev_show(struct device *dev,
802 struct device_attribute *attr,
803 char *buf)
804 {
805 struct mmc_card *card = mmc_dev_to_card(dev);
806
807 if (card->ext_csd.rev < 7) {
808 return sprintf(buf, "0x%x\n", card->cid.fwrev);
809 } else {
810 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
811 card->ext_csd.fwrev);
812 }
813 }
814
815 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
816
817 static ssize_t mmc_dsr_show(struct device *dev,
818 struct device_attribute *attr,
819 char *buf)
820 {
821 struct mmc_card *card = mmc_dev_to_card(dev);
822 struct mmc_host *host = card->host;
823
824 if (card->csd.dsr_imp && host->dsr_req)
825 return sprintf(buf, "0x%x\n", host->dsr);
826 else
827 /* return default DSR value */
828 return sprintf(buf, "0x%x\n", 0x404);
829 }
830
831 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
832
833 static struct attribute *mmc_std_attrs[] = {
834 &dev_attr_cid.attr,
835 &dev_attr_csd.attr,
836 &dev_attr_date.attr,
837 &dev_attr_erase_size.attr,
838 &dev_attr_preferred_erase_size.attr,
839 &dev_attr_fwrev.attr,
840 &dev_attr_ffu_capable.attr,
841 &dev_attr_hwrev.attr,
842 &dev_attr_manfid.attr,
843 &dev_attr_name.attr,
844 &dev_attr_oemid.attr,
845 &dev_attr_prv.attr,
846 &dev_attr_rev.attr,
847 &dev_attr_pre_eol_info.attr,
848 &dev_attr_life_time.attr,
849 &dev_attr_serial.attr,
850 &dev_attr_enhanced_area_offset.attr,
851 &dev_attr_enhanced_area_size.attr,
852 &dev_attr_raw_rpmb_size_mult.attr,
853 &dev_attr_rel_sectors.attr,
854 &dev_attr_ocr.attr,
855 &dev_attr_rca.attr,
856 &dev_attr_dsr.attr,
857 &dev_attr_cmdq_en.attr,
858 NULL,
859 };
860 ATTRIBUTE_GROUPS(mmc_std);
861
862 static struct device_type mmc_type = {
863 .groups = mmc_std_groups,
864 };
865
866 /*
867 * Select the PowerClass for the current bus width
868 * If power class is defined for 4/8 bit bus in the
869 * extended CSD register, select it by executing the
870 * mmc_switch command.
871 */
872 static int __mmc_select_powerclass(struct mmc_card *card,
873 unsigned int bus_width)
874 {
875 struct mmc_host *host = card->host;
876 struct mmc_ext_csd *ext_csd = &card->ext_csd;
877 unsigned int pwrclass_val = 0;
878 int err = 0;
879
880 switch (1 << host->ios.vdd) {
881 case MMC_VDD_165_195:
882 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
883 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
884 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
885 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
886 ext_csd->raw_pwr_cl_52_195 :
887 ext_csd->raw_pwr_cl_ddr_52_195;
888 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
889 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
890 break;
891 case MMC_VDD_27_28:
892 case MMC_VDD_28_29:
893 case MMC_VDD_29_30:
894 case MMC_VDD_30_31:
895 case MMC_VDD_31_32:
896 case MMC_VDD_32_33:
897 case MMC_VDD_33_34:
898 case MMC_VDD_34_35:
899 case MMC_VDD_35_36:
900 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
901 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
902 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
903 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
904 ext_csd->raw_pwr_cl_52_360 :
905 ext_csd->raw_pwr_cl_ddr_52_360;
906 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
907 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
908 ext_csd->raw_pwr_cl_ddr_200_360 :
909 ext_csd->raw_pwr_cl_200_360;
910 break;
911 default:
912 pr_warn("%s: Voltage range not supported for power class\n",
913 mmc_hostname(host));
914 return -EINVAL;
915 }
916
917 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
918 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
919 EXT_CSD_PWR_CL_8BIT_SHIFT;
920 else
921 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
922 EXT_CSD_PWR_CL_4BIT_SHIFT;
923
924 /* If the power class is different from the default value */
925 if (pwrclass_val > 0) {
926 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
927 EXT_CSD_POWER_CLASS,
928 pwrclass_val,
929 card->ext_csd.generic_cmd6_time);
930 }
931
932 return err;
933 }
934
935 static int mmc_select_powerclass(struct mmc_card *card)
936 {
937 struct mmc_host *host = card->host;
938 u32 bus_width, ext_csd_bits;
939 int err, ddr;
940
941 /* Power class selection is supported for versions >= 4.0 */
942 if (!mmc_can_ext_csd(card))
943 return 0;
944
945 bus_width = host->ios.bus_width;
946 /* Power class values are defined only for 4/8 bit bus */
947 if (bus_width == MMC_BUS_WIDTH_1)
948 return 0;
949
950 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
951 if (ddr)
952 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
953 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
954 else
955 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
956 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
957
958 err = __mmc_select_powerclass(card, ext_csd_bits);
959 if (err)
960 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
961 mmc_hostname(host), 1 << bus_width, ddr);
962
963 return err;
964 }
965
966 /*
967 * Set the bus speed for the selected speed mode.
968 */
969 static void mmc_set_bus_speed(struct mmc_card *card)
970 {
971 unsigned int max_dtr = (unsigned int)-1;
972
973 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
974 max_dtr > card->ext_csd.hs200_max_dtr)
975 max_dtr = card->ext_csd.hs200_max_dtr;
976 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
977 max_dtr = card->ext_csd.hs_max_dtr;
978 else if (max_dtr > card->csd.max_dtr)
979 max_dtr = card->csd.max_dtr;
980
981 mmc_set_clock(card->host, max_dtr);
982 }
983
984 /*
985 * Select the bus width amoung 4-bit and 8-bit(SDR).
986 * If the bus width is changed successfully, return the selected width value.
987 * Zero is returned instead of error value if the wide width is not supported.
988 */
989 static int mmc_select_bus_width(struct mmc_card *card)
990 {
991 static unsigned ext_csd_bits[] = {
992 EXT_CSD_BUS_WIDTH_8,
993 EXT_CSD_BUS_WIDTH_4,
994 };
995 static unsigned bus_widths[] = {
996 MMC_BUS_WIDTH_8,
997 MMC_BUS_WIDTH_4,
998 };
999 struct mmc_host *host = card->host;
1000 unsigned idx, bus_width = 0;
1001 int err = 0;
1002
1003 if (!mmc_can_ext_csd(card) ||
1004 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1005 return 0;
1006
1007 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1008
1009 /*
1010 * Unlike SD, MMC cards dont have a configuration register to notify
1011 * supported bus width. So bus test command should be run to identify
1012 * the supported bus width or compare the ext csd values of current
1013 * bus width and ext csd values of 1 bit mode read earlier.
1014 */
1015 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1016 /*
1017 * Host is capable of 8bit transfer, then switch
1018 * the device to work in 8bit transfer mode. If the
1019 * mmc switch command returns error then switch to
1020 * 4bit transfer mode. On success set the corresponding
1021 * bus width on the host.
1022 */
1023 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1024 EXT_CSD_BUS_WIDTH,
1025 ext_csd_bits[idx],
1026 card->ext_csd.generic_cmd6_time);
1027 if (err)
1028 continue;
1029
1030 bus_width = bus_widths[idx];
1031 mmc_set_bus_width(host, bus_width);
1032
1033 /*
1034 * If controller can't handle bus width test,
1035 * compare ext_csd previously read in 1 bit mode
1036 * against ext_csd at new bus width
1037 */
1038 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1039 err = mmc_compare_ext_csds(card, bus_width);
1040 else
1041 err = mmc_bus_test(card, bus_width);
1042
1043 if (!err) {
1044 err = bus_width;
1045 break;
1046 } else {
1047 pr_warn("%s: switch to bus width %d failed\n",
1048 mmc_hostname(host), 1 << bus_width);
1049 }
1050 }
1051
1052 return err;
1053 }
1054
1055 /*
1056 * Switch to the high-speed mode
1057 */
1058 static int mmc_select_hs(struct mmc_card *card)
1059 {
1060 int err;
1061
1062 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1063 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1064 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1065 true, true, true);
1066 if (err)
1067 pr_warn("%s: switch to high-speed failed, err:%d\n",
1068 mmc_hostname(card->host), err);
1069
1070 return err;
1071 }
1072
1073 /*
1074 * Activate wide bus and DDR if supported.
1075 */
1076 static int mmc_select_hs_ddr(struct mmc_card *card)
1077 {
1078 struct mmc_host *host = card->host;
1079 u32 bus_width, ext_csd_bits;
1080 int err = 0;
1081
1082 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1083 return 0;
1084
1085 bus_width = host->ios.bus_width;
1086 if (bus_width == MMC_BUS_WIDTH_1)
1087 return 0;
1088
1089 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1090 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1091
1092 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1093 EXT_CSD_BUS_WIDTH,
1094 ext_csd_bits,
1095 card->ext_csd.generic_cmd6_time,
1096 MMC_TIMING_MMC_DDR52,
1097 true, true, true);
1098 if (err) {
1099 pr_err("%s: switch to bus width %d ddr failed\n",
1100 mmc_hostname(host), 1 << bus_width);
1101 return err;
1102 }
1103
1104 /*
1105 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1106 * signaling.
1107 *
1108 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1109 *
1110 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1111 * in the JEDEC spec for DDR.
1112 *
1113 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1114 * host controller can support this, like some of the SDHCI
1115 * controller which connect to an eMMC device. Some of these
1116 * host controller still needs to use 1.8v vccq for supporting
1117 * DDR mode.
1118 *
1119 * So the sequence will be:
1120 * if (host and device can both support 1.2v IO)
1121 * use 1.2v IO;
1122 * else if (host and device can both support 1.8v IO)
1123 * use 1.8v IO;
1124 * so if host and device can only support 3.3v IO, this is the
1125 * last choice.
1126 *
1127 * WARNING: eMMC rules are NOT the same as SD DDR
1128 */
1129 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1130 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1131 if (!err)
1132 return 0;
1133 }
1134
1135 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1136 host->caps & MMC_CAP_1_8V_DDR)
1137 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1138
1139 /* make sure vccq is 3.3v after switching disaster */
1140 if (err)
1141 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1142
1143 return err;
1144 }
1145
1146 static int mmc_select_hs400(struct mmc_card *card)
1147 {
1148 struct mmc_host *host = card->host;
1149 unsigned int max_dtr;
1150 int err = 0;
1151 u8 val;
1152
1153 /*
1154 * HS400 mode requires 8-bit bus width
1155 */
1156 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1157 host->ios.bus_width == MMC_BUS_WIDTH_8))
1158 return 0;
1159
1160 /* Switch card to HS mode */
1161 val = EXT_CSD_TIMING_HS;
1162 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1163 EXT_CSD_HS_TIMING, val,
1164 card->ext_csd.generic_cmd6_time, 0,
1165 true, false, true);
1166 if (err) {
1167 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1168 mmc_hostname(host), err);
1169 return err;
1170 }
1171
1172 /* Set host controller to HS timing */
1173 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1174
1175 /* Prepare host to downgrade to HS timing */
1176 if (host->ops->hs400_downgrade)
1177 host->ops->hs400_downgrade(host);
1178
1179 /* Reduce frequency to HS frequency */
1180 max_dtr = card->ext_csd.hs_max_dtr;
1181 mmc_set_clock(host, max_dtr);
1182
1183 err = mmc_switch_status(card);
1184 if (err)
1185 goto out_err;
1186
1187 if (host->ops->hs400_prepare_ddr)
1188 host->ops->hs400_prepare_ddr(host);
1189
1190 /* Switch card to DDR */
1191 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1192 EXT_CSD_BUS_WIDTH,
1193 EXT_CSD_DDR_BUS_WIDTH_8,
1194 card->ext_csd.generic_cmd6_time);
1195 if (err) {
1196 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1197 mmc_hostname(host), err);
1198 return err;
1199 }
1200
1201 /* Switch card to HS400 */
1202 val = EXT_CSD_TIMING_HS400 |
1203 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1204 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1205 EXT_CSD_HS_TIMING, val,
1206 card->ext_csd.generic_cmd6_time, 0,
1207 true, false, true);
1208 if (err) {
1209 pr_err("%s: switch to hs400 failed, err:%d\n",
1210 mmc_hostname(host), err);
1211 return err;
1212 }
1213
1214 /* Set host controller to HS400 timing and frequency */
1215 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1216 mmc_set_bus_speed(card);
1217
1218 if (host->ops->hs400_complete)
1219 host->ops->hs400_complete(host);
1220
1221 err = mmc_switch_status(card);
1222 if (err)
1223 goto out_err;
1224
1225 return 0;
1226
1227 out_err:
1228 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1229 __func__, err);
1230 return err;
1231 }
1232
1233 int mmc_hs200_to_hs400(struct mmc_card *card)
1234 {
1235 return mmc_select_hs400(card);
1236 }
1237
1238 int mmc_hs400_to_hs200(struct mmc_card *card)
1239 {
1240 struct mmc_host *host = card->host;
1241 unsigned int max_dtr;
1242 int err;
1243 u8 val;
1244
1245 /* Reduce frequency to HS */
1246 max_dtr = card->ext_csd.hs_max_dtr;
1247 mmc_set_clock(host, max_dtr);
1248
1249 /* Switch HS400 to HS DDR */
1250 val = EXT_CSD_TIMING_HS;
1251 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1252 val, card->ext_csd.generic_cmd6_time, 0,
1253 true, false, true);
1254 if (err)
1255 goto out_err;
1256
1257 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1258
1259 err = mmc_switch_status(card);
1260 if (err)
1261 goto out_err;
1262
1263 /* Switch HS DDR to HS */
1264 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1265 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1266 0, true, false, true);
1267 if (err)
1268 goto out_err;
1269
1270 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1271
1272 if (host->ops->hs400_downgrade)
1273 host->ops->hs400_downgrade(host);
1274
1275 err = mmc_switch_status(card);
1276 if (err)
1277 goto out_err;
1278
1279 /* Switch HS to HS200 */
1280 val = EXT_CSD_TIMING_HS200 |
1281 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1282 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1283 val, card->ext_csd.generic_cmd6_time, 0,
1284 true, false, true);
1285 if (err)
1286 goto out_err;
1287
1288 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1289
1290 /*
1291 * For HS200, CRC errors are not a reliable way to know the switch
1292 * failed. If there really is a problem, we would expect tuning will
1293 * fail and the result ends up the same.
1294 */
1295 err = __mmc_switch_status(card, false);
1296 if (err)
1297 goto out_err;
1298
1299 mmc_set_bus_speed(card);
1300
1301 /* Prepare tuning for HS400 mode. */
1302 if (host->ops->prepare_hs400_tuning)
1303 host->ops->prepare_hs400_tuning(host, &host->ios);
1304
1305 return 0;
1306
1307 out_err:
1308 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1309 __func__, err);
1310 return err;
1311 }
1312
1313 static void mmc_select_driver_type(struct mmc_card *card)
1314 {
1315 int card_drv_type, drive_strength, drv_type = 0;
1316 int fixed_drv_type = card->host->fixed_drv_type;
1317
1318 card_drv_type = card->ext_csd.raw_driver_strength |
1319 mmc_driver_type_mask(0);
1320
1321 if (fixed_drv_type >= 0)
1322 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1323 ? fixed_drv_type : 0;
1324 else
1325 drive_strength = mmc_select_drive_strength(card,
1326 card->ext_csd.hs200_max_dtr,
1327 card_drv_type, &drv_type);
1328
1329 card->drive_strength = drive_strength;
1330
1331 if (drv_type)
1332 mmc_set_driver_type(card->host, drv_type);
1333 }
1334
1335 static int mmc_select_hs400es(struct mmc_card *card)
1336 {
1337 struct mmc_host *host = card->host;
1338 int err = -EINVAL;
1339 u8 val;
1340
1341 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1342 err = -ENOTSUPP;
1343 goto out_err;
1344 }
1345
1346 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1347 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1348
1349 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1350 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1351
1352 /* If fails try again during next card power cycle */
1353 if (err)
1354 goto out_err;
1355
1356 err = mmc_select_bus_width(card);
1357 if (err != MMC_BUS_WIDTH_8) {
1358 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1359 mmc_hostname(host), err);
1360 err = err < 0 ? err : -ENOTSUPP;
1361 goto out_err;
1362 }
1363
1364 /* Switch card to HS mode */
1365 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1366 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1367 card->ext_csd.generic_cmd6_time, 0,
1368 true, false, true);
1369 if (err) {
1370 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1371 mmc_hostname(host), err);
1372 goto out_err;
1373 }
1374
1375 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1376 err = mmc_switch_status(card);
1377 if (err)
1378 goto out_err;
1379
1380 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1381
1382 /* Switch card to DDR with strobe bit */
1383 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1384 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1385 EXT_CSD_BUS_WIDTH,
1386 val,
1387 card->ext_csd.generic_cmd6_time);
1388 if (err) {
1389 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1390 mmc_hostname(host), err);
1391 goto out_err;
1392 }
1393
1394 mmc_select_driver_type(card);
1395
1396 /* Switch card to HS400 */
1397 val = EXT_CSD_TIMING_HS400 |
1398 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1399 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1400 EXT_CSD_HS_TIMING, val,
1401 card->ext_csd.generic_cmd6_time, 0,
1402 true, false, true);
1403 if (err) {
1404 pr_err("%s: switch to hs400es failed, err:%d\n",
1405 mmc_hostname(host), err);
1406 goto out_err;
1407 }
1408
1409 /* Set host controller to HS400 timing and frequency */
1410 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1411
1412 /* Controller enable enhanced strobe function */
1413 host->ios.enhanced_strobe = true;
1414 if (host->ops->hs400_enhanced_strobe)
1415 host->ops->hs400_enhanced_strobe(host, &host->ios);
1416
1417 err = mmc_switch_status(card);
1418 if (err)
1419 goto out_err;
1420
1421 return 0;
1422
1423 out_err:
1424 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1425 __func__, err);
1426 return err;
1427 }
1428
1429 /*
1430 * For device supporting HS200 mode, the following sequence
1431 * should be done before executing the tuning process.
1432 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1433 * 2. switch to HS200 mode
1434 * 3. set the clock to > 52Mhz and <=200MHz
1435 */
1436 static int mmc_select_hs200(struct mmc_card *card)
1437 {
1438 struct mmc_host *host = card->host;
1439 unsigned int old_timing, old_signal_voltage;
1440 int err = -EINVAL;
1441 u8 val;
1442
1443 old_signal_voltage = host->ios.signal_voltage;
1444 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1445 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1446
1447 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1448 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1449
1450 /* If fails try again during next card power cycle */
1451 if (err)
1452 return err;
1453
1454 mmc_select_driver_type(card);
1455
1456 /*
1457 * Set the bus width(4 or 8) with host's support and
1458 * switch to HS200 mode if bus width is set successfully.
1459 */
1460 err = mmc_select_bus_width(card);
1461 if (err > 0) {
1462 val = EXT_CSD_TIMING_HS200 |
1463 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1464 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1465 EXT_CSD_HS_TIMING, val,
1466 card->ext_csd.generic_cmd6_time, 0,
1467 true, false, true);
1468 if (err)
1469 goto err;
1470 old_timing = host->ios.timing;
1471 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1472
1473 /*
1474 * For HS200, CRC errors are not a reliable way to know the
1475 * switch failed. If there really is a problem, we would expect
1476 * tuning will fail and the result ends up the same.
1477 */
1478 err = __mmc_switch_status(card, false);
1479
1480 /*
1481 * mmc_select_timing() assumes timing has not changed if
1482 * it is a switch error.
1483 */
1484 if (err == -EBADMSG)
1485 mmc_set_timing(host, old_timing);
1486 }
1487 err:
1488 if (err) {
1489 /* fall back to the old signal voltage, if fails report error */
1490 if (mmc_set_signal_voltage(host, old_signal_voltage))
1491 err = -EIO;
1492
1493 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1494 __func__, err);
1495 }
1496 return err;
1497 }
1498
1499 /*
1500 * Activate High Speed, HS200 or HS400ES mode if supported.
1501 */
1502 static int mmc_select_timing(struct mmc_card *card)
1503 {
1504 int err = 0;
1505
1506 if (!mmc_can_ext_csd(card))
1507 goto bus_speed;
1508
1509 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1510 err = mmc_select_hs400es(card);
1511 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1512 err = mmc_select_hs200(card);
1513 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1514 err = mmc_select_hs(card);
1515
1516 if (err && err != -EBADMSG)
1517 return err;
1518
1519 bus_speed:
1520 /*
1521 * Set the bus speed to the selected bus timing.
1522 * If timing is not selected, backward compatible is the default.
1523 */
1524 mmc_set_bus_speed(card);
1525 return 0;
1526 }
1527
1528 /*
1529 * Execute tuning sequence to seek the proper bus operating
1530 * conditions for HS200 and HS400, which sends CMD21 to the device.
1531 */
1532 static int mmc_hs200_tuning(struct mmc_card *card)
1533 {
1534 struct mmc_host *host = card->host;
1535
1536 /*
1537 * Timing should be adjusted to the HS400 target
1538 * operation frequency for tuning process
1539 */
1540 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1541 host->ios.bus_width == MMC_BUS_WIDTH_8)
1542 if (host->ops->prepare_hs400_tuning)
1543 host->ops->prepare_hs400_tuning(host, &host->ios);
1544
1545 return mmc_execute_tuning(card);
1546 }
1547
1548 /*
1549 * Handle the detection and initialisation of a card.
1550 *
1551 * In the case of a resume, "oldcard" will contain the card
1552 * we're trying to reinitialise.
1553 */
1554 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1555 struct mmc_card *oldcard)
1556 {
1557 struct mmc_card *card;
1558 int err;
1559 u32 cid[4];
1560 u32 rocr;
1561
1562 WARN_ON(!host->claimed);
1563
1564 /* Set correct bus mode for MMC before attempting init */
1565 if (!mmc_host_is_spi(host))
1566 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1567
1568 /*
1569 * Since we're changing the OCR value, we seem to
1570 * need to tell some cards to go back to the idle
1571 * state. We wait 1ms to give cards time to
1572 * respond.
1573 * mmc_go_idle is needed for eMMC that are asleep
1574 */
1575 mmc_go_idle(host);
1576
1577 /* The extra bit indicates that we support high capacity */
1578 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1579 if (err)
1580 goto err;
1581
1582 /*
1583 * For SPI, enable CRC as appropriate.
1584 */
1585 if (mmc_host_is_spi(host)) {
1586 err = mmc_spi_set_crc(host, use_spi_crc);
1587 if (err)
1588 goto err;
1589 }
1590
1591 /*
1592 * Fetch CID from card.
1593 */
1594 err = mmc_send_cid(host, cid);
1595 if (err)
1596 goto err;
1597
1598 if (oldcard) {
1599 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1600 pr_debug("%s: Perhaps the card was replaced\n",
1601 mmc_hostname(host));
1602 err = -ENOENT;
1603 goto err;
1604 }
1605
1606 card = oldcard;
1607 } else {
1608 /*
1609 * Allocate card structure.
1610 */
1611 card = mmc_alloc_card(host, &mmc_type);
1612 if (IS_ERR(card)) {
1613 err = PTR_ERR(card);
1614 goto err;
1615 }
1616
1617 card->ocr = ocr;
1618 card->type = MMC_TYPE_MMC;
1619 card->rca = 1;
1620 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1621 }
1622
1623 /*
1624 * Call the optional HC's init_card function to handle quirks.
1625 */
1626 if (host->ops->init_card)
1627 host->ops->init_card(host, card);
1628
1629 /*
1630 * For native busses: set card RCA and quit open drain mode.
1631 */
1632 if (!mmc_host_is_spi(host)) {
1633 err = mmc_set_relative_addr(card);
1634 if (err)
1635 goto free_card;
1636
1637 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1638 }
1639
1640 if (!oldcard) {
1641 /*
1642 * Fetch CSD from card.
1643 */
1644 err = mmc_send_csd(card, card->raw_csd);
1645 if (err)
1646 goto free_card;
1647
1648 err = mmc_decode_csd(card);
1649 if (err)
1650 goto free_card;
1651 err = mmc_decode_cid(card);
1652 if (err)
1653 goto free_card;
1654 }
1655
1656 /*
1657 * handling only for cards supporting DSR and hosts requesting
1658 * DSR configuration
1659 */
1660 if (card->csd.dsr_imp && host->dsr_req)
1661 mmc_set_dsr(host);
1662
1663 /*
1664 * Select card, as all following commands rely on that.
1665 */
1666 if (!mmc_host_is_spi(host)) {
1667 err = mmc_select_card(card);
1668 if (err)
1669 goto free_card;
1670 }
1671
1672 if (!oldcard) {
1673 /* Read extended CSD. */
1674 err = mmc_read_ext_csd(card);
1675 if (err)
1676 goto free_card;
1677
1678 /*
1679 * If doing byte addressing, check if required to do sector
1680 * addressing. Handle the case of <2GB cards needing sector
1681 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1682 * ocr register has bit 30 set for sector addressing.
1683 */
1684 if (rocr & BIT(30))
1685 mmc_card_set_blockaddr(card);
1686
1687 /* Erase size depends on CSD and Extended CSD */
1688 mmc_set_erase_size(card);
1689 }
1690
1691 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1692 if (card->ext_csd.rev >= 3) {
1693 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1694 EXT_CSD_ERASE_GROUP_DEF, 1,
1695 card->ext_csd.generic_cmd6_time);
1696
1697 if (err && err != -EBADMSG)
1698 goto free_card;
1699
1700 if (err) {
1701 err = 0;
1702 /*
1703 * Just disable enhanced area off & sz
1704 * will try to enable ERASE_GROUP_DEF
1705 * during next time reinit
1706 */
1707 card->ext_csd.enhanced_area_offset = -EINVAL;
1708 card->ext_csd.enhanced_area_size = -EINVAL;
1709 } else {
1710 card->ext_csd.erase_group_def = 1;
1711 /*
1712 * enable ERASE_GRP_DEF successfully.
1713 * This will affect the erase size, so
1714 * here need to reset erase size
1715 */
1716 mmc_set_erase_size(card);
1717 }
1718 }
1719
1720 /*
1721 * Ensure eMMC user default partition is enabled
1722 */
1723 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1724 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1725 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1726 card->ext_csd.part_config,
1727 card->ext_csd.part_time);
1728 if (err && err != -EBADMSG)
1729 goto free_card;
1730 }
1731
1732 /*
1733 * Enable power_off_notification byte in the ext_csd register
1734 */
1735 if (card->ext_csd.rev >= 6) {
1736 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1737 EXT_CSD_POWER_OFF_NOTIFICATION,
1738 EXT_CSD_POWER_ON,
1739 card->ext_csd.generic_cmd6_time);
1740 if (err && err != -EBADMSG)
1741 goto free_card;
1742
1743 /*
1744 * The err can be -EBADMSG or 0,
1745 * so check for success and update the flag
1746 */
1747 if (!err)
1748 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1749 }
1750
1751 /* set erase_arg */
1752 if (mmc_can_discard(card))
1753 card->erase_arg = MMC_DISCARD_ARG;
1754 else if (mmc_can_trim(card))
1755 card->erase_arg = MMC_TRIM_ARG;
1756 else
1757 card->erase_arg = MMC_ERASE_ARG;
1758
1759 /*
1760 * Select timing interface
1761 */
1762 err = mmc_select_timing(card);
1763 if (err)
1764 goto free_card;
1765
1766 if (mmc_card_hs200(card)) {
1767 err = mmc_hs200_tuning(card);
1768 if (err)
1769 goto free_card;
1770
1771 err = mmc_select_hs400(card);
1772 if (err)
1773 goto free_card;
1774 } else if (!mmc_card_hs400es(card)) {
1775 /* Select the desired bus width optionally */
1776 err = mmc_select_bus_width(card);
1777 if (err > 0 && mmc_card_hs(card)) {
1778 err = mmc_select_hs_ddr(card);
1779 if (err)
1780 goto free_card;
1781 }
1782 }
1783
1784 /*
1785 * Choose the power class with selected bus interface
1786 */
1787 mmc_select_powerclass(card);
1788
1789 /*
1790 * Enable HPI feature (if supported)
1791 */
1792 if (card->ext_csd.hpi) {
1793 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1794 EXT_CSD_HPI_MGMT, 1,
1795 card->ext_csd.generic_cmd6_time);
1796 if (err && err != -EBADMSG)
1797 goto free_card;
1798 if (err) {
1799 pr_warn("%s: Enabling HPI failed\n",
1800 mmc_hostname(card->host));
1801 card->ext_csd.hpi_en = 0;
1802 err = 0;
1803 } else {
1804 card->ext_csd.hpi_en = 1;
1805 }
1806 }
1807
1808 /*
1809 * If cache size is higher than 0, this indicates the existence of cache
1810 * and it can be turned on. Note that some eMMCs from Micron has been
1811 * reported to need ~800 ms timeout, while enabling the cache after
1812 * sudden power failure tests. Let's extend the timeout to a minimum of
1813 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1814 */
1815 if (card->ext_csd.cache_size > 0) {
1816 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1817
1818 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1819 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1820 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1821 if (err && err != -EBADMSG)
1822 goto free_card;
1823
1824 /*
1825 * Only if no error, cache is turned on successfully.
1826 */
1827 if (err) {
1828 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1829 mmc_hostname(card->host), err);
1830 card->ext_csd.cache_ctrl = 0;
1831 err = 0;
1832 } else {
1833 card->ext_csd.cache_ctrl = 1;
1834 }
1835 }
1836
1837 /*
1838 * Enable Command Queue if supported. Note that Packed Commands cannot
1839 * be used with Command Queue.
1840 */
1841 card->ext_csd.cmdq_en = false;
1842 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1843 err = mmc_cmdq_enable(card);
1844 if (err && err != -EBADMSG)
1845 goto free_card;
1846 if (err) {
1847 pr_warn("%s: Enabling CMDQ failed\n",
1848 mmc_hostname(card->host));
1849 card->ext_csd.cmdq_support = false;
1850 card->ext_csd.cmdq_depth = 0;
1851 err = 0;
1852 }
1853 }
1854 /*
1855 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1856 * disabled for a time, so a flag is needed to indicate to re-enable the
1857 * Command Queue.
1858 */
1859 card->reenable_cmdq = card->ext_csd.cmdq_en;
1860
1861 if (card->ext_csd.cmdq_en && !host->cqe_enabled) {
1862 err = host->cqe_ops->cqe_enable(host, card);
1863 if (err) {
1864 pr_err("%s: Failed to enable CQE, error %d\n",
1865 mmc_hostname(host), err);
1866 } else {
1867 host->cqe_enabled = true;
1868 pr_info("%s: Command Queue Engine enabled\n",
1869 mmc_hostname(host));
1870 }
1871 }
1872
1873 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1874 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1875 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1876 mmc_hostname(host));
1877 err = -EINVAL;
1878 goto free_card;
1879 }
1880
1881 if (!oldcard)
1882 host->card = card;
1883
1884 return 0;
1885
1886 free_card:
1887 if (!oldcard)
1888 mmc_remove_card(card);
1889 err:
1890 return err;
1891 }
1892
1893 static int mmc_can_sleep(struct mmc_card *card)
1894 {
1895 return (card && card->ext_csd.rev >= 3);
1896 }
1897
1898 static int mmc_sleep(struct mmc_host *host)
1899 {
1900 struct mmc_command cmd = {};
1901 struct mmc_card *card = host->card;
1902 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1903 int err;
1904
1905 /* Re-tuning can't be done once the card is deselected */
1906 mmc_retune_hold(host);
1907
1908 err = mmc_deselect_cards(host);
1909 if (err)
1910 goto out_release;
1911
1912 cmd.opcode = MMC_SLEEP_AWAKE;
1913 cmd.arg = card->rca << 16;
1914 cmd.arg |= 1 << 15;
1915
1916 /*
1917 * If the max_busy_timeout of the host is specified, validate it against
1918 * the sleep cmd timeout. A failure means we need to prevent the host
1919 * from doing hw busy detection, which is done by converting to a R1
1920 * response instead of a R1B. Note, some hosts requires R1B, which also
1921 * means they are on their own when it comes to deal with the busy
1922 * timeout.
1923 */
1924 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
1925 (timeout_ms > host->max_busy_timeout)) {
1926 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1927 } else {
1928 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1929 cmd.busy_timeout = timeout_ms;
1930 }
1931
1932 err = mmc_wait_for_cmd(host, &cmd, 0);
1933 if (err)
1934 goto out_release;
1935
1936 /*
1937 * If the host does not wait while the card signals busy, then we will
1938 * will have to wait the sleep/awake timeout. Note, we cannot use the
1939 * SEND_STATUS command to poll the status because that command (and most
1940 * others) is invalid while the card sleeps.
1941 */
1942 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1943 mmc_delay(timeout_ms);
1944
1945 out_release:
1946 mmc_retune_release(host);
1947 return err;
1948 }
1949
1950 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1951 {
1952 return card &&
1953 mmc_card_mmc(card) &&
1954 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1955 }
1956
1957 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1958 {
1959 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1960 int err;
1961
1962 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1963 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1964 timeout = card->ext_csd.power_off_longtime;
1965
1966 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1967 EXT_CSD_POWER_OFF_NOTIFICATION,
1968 notify_type, timeout, 0, true, false, false);
1969 if (err)
1970 pr_err("%s: Power Off Notification timed out, %u\n",
1971 mmc_hostname(card->host), timeout);
1972
1973 /* Disable the power off notification after the switch operation. */
1974 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1975
1976 return err;
1977 }
1978
1979 /*
1980 * Host is being removed. Free up the current card.
1981 */
1982 static void mmc_remove(struct mmc_host *host)
1983 {
1984 mmc_remove_card(host->card);
1985 host->card = NULL;
1986 }
1987
1988 /*
1989 * Card detection - card is alive.
1990 */
1991 static int mmc_alive(struct mmc_host *host)
1992 {
1993 return mmc_send_status(host->card, NULL);
1994 }
1995
1996 /*
1997 * Card detection callback from host.
1998 */
1999 static void mmc_detect(struct mmc_host *host)
2000 {
2001 int err;
2002
2003 mmc_get_card(host->card, NULL);
2004
2005 /*
2006 * Just check if our card has been removed.
2007 */
2008 err = _mmc_detect_card_removed(host);
2009
2010 mmc_put_card(host->card, NULL);
2011
2012 if (err) {
2013 mmc_remove(host);
2014
2015 mmc_claim_host(host);
2016 mmc_detach_bus(host);
2017 mmc_power_off(host);
2018 mmc_release_host(host);
2019 }
2020 }
2021
2022 static bool _mmc_cache_enabled(struct mmc_host *host)
2023 {
2024 return host->card->ext_csd.cache_size > 0 &&
2025 host->card->ext_csd.cache_ctrl & 1;
2026 }
2027
2028 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2029 {
2030 int err = 0;
2031 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2032 EXT_CSD_POWER_OFF_LONG;
2033
2034 mmc_claim_host(host);
2035
2036 if (mmc_card_suspended(host->card))
2037 goto out;
2038
2039 err = mmc_flush_cache(host->card);
2040 if (err)
2041 goto out;
2042
2043 if (mmc_can_poweroff_notify(host->card) &&
2044 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
2045 err = mmc_poweroff_notify(host->card, notify_type);
2046 else if (mmc_can_sleep(host->card))
2047 err = mmc_sleep(host);
2048 else if (!mmc_host_is_spi(host))
2049 err = mmc_deselect_cards(host);
2050
2051 if (!err) {
2052 mmc_power_off(host);
2053 mmc_card_set_suspended(host->card);
2054 }
2055 out:
2056 mmc_release_host(host);
2057 return err;
2058 }
2059
2060 /*
2061 * Suspend callback
2062 */
2063 static int mmc_suspend(struct mmc_host *host)
2064 {
2065 int err;
2066
2067 err = _mmc_suspend(host, true);
2068 if (!err) {
2069 pm_runtime_disable(&host->card->dev);
2070 pm_runtime_set_suspended(&host->card->dev);
2071 }
2072
2073 return err;
2074 }
2075
2076 /*
2077 * This function tries to determine if the same card is still present
2078 * and, if so, restore all state to it.
2079 */
2080 static int _mmc_resume(struct mmc_host *host)
2081 {
2082 int err = 0;
2083
2084 mmc_claim_host(host);
2085
2086 if (!mmc_card_suspended(host->card))
2087 goto out;
2088
2089 mmc_power_up(host, host->card->ocr);
2090 err = mmc_init_card(host, host->card->ocr, host->card);
2091 mmc_card_clr_suspended(host->card);
2092
2093 out:
2094 mmc_release_host(host);
2095 return err;
2096 }
2097
2098 /*
2099 * Shutdown callback
2100 */
2101 static int mmc_shutdown(struct mmc_host *host)
2102 {
2103 int err = 0;
2104
2105 /*
2106 * In a specific case for poweroff notify, we need to resume the card
2107 * before we can shutdown it properly.
2108 */
2109 if (mmc_can_poweroff_notify(host->card) &&
2110 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2111 err = _mmc_resume(host);
2112
2113 if (!err)
2114 err = _mmc_suspend(host, false);
2115
2116 return err;
2117 }
2118
2119 /*
2120 * Callback for resume.
2121 */
2122 static int mmc_resume(struct mmc_host *host)
2123 {
2124 pm_runtime_enable(&host->card->dev);
2125 return 0;
2126 }
2127
2128 /*
2129 * Callback for runtime_suspend.
2130 */
2131 static int mmc_runtime_suspend(struct mmc_host *host)
2132 {
2133 int err;
2134
2135 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2136 return 0;
2137
2138 err = _mmc_suspend(host, true);
2139 if (err)
2140 pr_err("%s: error %d doing aggressive suspend\n",
2141 mmc_hostname(host), err);
2142
2143 return err;
2144 }
2145
2146 /*
2147 * Callback for runtime_resume.
2148 */
2149 static int mmc_runtime_resume(struct mmc_host *host)
2150 {
2151 int err;
2152
2153 err = _mmc_resume(host);
2154 if (err && err != -ENOMEDIUM)
2155 pr_err("%s: error %d doing runtime resume\n",
2156 mmc_hostname(host), err);
2157
2158 return 0;
2159 }
2160
2161 static int mmc_can_reset(struct mmc_card *card)
2162 {
2163 u8 rst_n_function;
2164
2165 rst_n_function = card->ext_csd.rst_n_function;
2166 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2167 return 0;
2168 return 1;
2169 }
2170
2171 static int _mmc_hw_reset(struct mmc_host *host)
2172 {
2173 struct mmc_card *card = host->card;
2174
2175 /*
2176 * In the case of recovery, we can't expect flushing the cache to work
2177 * always, but we have a go and ignore errors.
2178 */
2179 mmc_flush_cache(host->card);
2180
2181 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2182 mmc_can_reset(card)) {
2183 /* If the card accept RST_n signal, send it. */
2184 mmc_set_clock(host, host->f_init);
2185 host->ops->hw_reset(host);
2186 /* Set initial state and call mmc_set_ios */
2187 mmc_set_initial_state(host);
2188 } else {
2189 /* Do a brute force power cycle */
2190 mmc_power_cycle(host, card->ocr);
2191 mmc_pwrseq_reset(host);
2192 }
2193 return mmc_init_card(host, card->ocr, card);
2194 }
2195
2196 static const struct mmc_bus_ops mmc_ops = {
2197 .remove = mmc_remove,
2198 .detect = mmc_detect,
2199 .suspend = mmc_suspend,
2200 .resume = mmc_resume,
2201 .runtime_suspend = mmc_runtime_suspend,
2202 .runtime_resume = mmc_runtime_resume,
2203 .alive = mmc_alive,
2204 .shutdown = mmc_shutdown,
2205 .hw_reset = _mmc_hw_reset,
2206 .cache_enabled = _mmc_cache_enabled,
2207 };
2208
2209 /*
2210 * Starting point for MMC card init.
2211 */
2212 int mmc_attach_mmc(struct mmc_host *host)
2213 {
2214 int err;
2215 u32 ocr, rocr;
2216
2217 WARN_ON(!host->claimed);
2218
2219 /* Set correct bus mode for MMC before attempting attach */
2220 if (!mmc_host_is_spi(host))
2221 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2222
2223 err = mmc_send_op_cond(host, 0, &ocr);
2224 if (err)
2225 return err;
2226
2227 mmc_attach_bus(host, &mmc_ops);
2228 if (host->ocr_avail_mmc)
2229 host->ocr_avail = host->ocr_avail_mmc;
2230
2231 /*
2232 * We need to get OCR a different way for SPI.
2233 */
2234 if (mmc_host_is_spi(host)) {
2235 err = mmc_spi_read_ocr(host, 1, &ocr);
2236 if (err)
2237 goto err;
2238 }
2239
2240 rocr = mmc_select_voltage(host, ocr);
2241
2242 /*
2243 * Can we support the voltage of the card?
2244 */
2245 if (!rocr) {
2246 err = -EINVAL;
2247 goto err;
2248 }
2249
2250 /*
2251 * Detect and init the card.
2252 */
2253 err = mmc_init_card(host, rocr, NULL);
2254 if (err)
2255 goto err;
2256
2257 mmc_release_host(host);
2258 err = mmc_add_card(host->card);
2259 if (err)
2260 goto remove_card;
2261
2262 mmc_claim_host(host);
2263 return 0;
2264
2265 remove_card:
2266 mmc_remove_card(host->card);
2267 mmc_claim_host(host);
2268 host->card = NULL;
2269 err:
2270 mmc_detach_bus(host);
2271
2272 pr_err("%s: error %d whilst initialising MMC card\n",
2273 mmc_hostname(host), err);
2274
2275 return err;
2276 }
Ubuntu Focal Linux kernel mirror