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io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
[linux/fpc-iii.git] / drivers / mmc / core / mmc.c
blobff3063ce2acda41e12ec2c611b06fc4019960d51
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 /* Some eMMC set the value too low so set a minimum */
427 if (card->ext_csd.part_time &&
428 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
429 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
430
431 /* Sleep / awake timeout in 100ns units */
432 if (sa_shift > 0 && sa_shift <= 0x17)
433 card->ext_csd.sa_timeout =
434 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
435 card->ext_csd.erase_group_def =
436 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
437 card->ext_csd.hc_erase_timeout = 300 *
438 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
439 card->ext_csd.hc_erase_size =
440 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
441
442 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
443
444 /*
445 * There are two boot regions of equal size, defined in
446 * multiples of 128K.
447 */
448 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
449 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
450 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
451 mmc_part_add(card, part_size,
452 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
453 "boot%d", idx, true,
454 MMC_BLK_DATA_AREA_BOOT);
455 }
456 }
457 }
458
459 card->ext_csd.raw_hc_erase_gap_size =
460 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
461 card->ext_csd.raw_sec_trim_mult =
462 ext_csd[EXT_CSD_SEC_TRIM_MULT];
463 card->ext_csd.raw_sec_erase_mult =
464 ext_csd[EXT_CSD_SEC_ERASE_MULT];
465 card->ext_csd.raw_sec_feature_support =
466 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
467 card->ext_csd.raw_trim_mult =
468 ext_csd[EXT_CSD_TRIM_MULT];
469 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
470 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
471 if (card->ext_csd.rev >= 4) {
472 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
473 EXT_CSD_PART_SETTING_COMPLETED)
474 card->ext_csd.partition_setting_completed = 1;
475 else
476 card->ext_csd.partition_setting_completed = 0;
477
478 mmc_manage_enhanced_area(card, ext_csd);
479
480 mmc_manage_gp_partitions(card, ext_csd);
481
482 card->ext_csd.sec_trim_mult =
483 ext_csd[EXT_CSD_SEC_TRIM_MULT];
484 card->ext_csd.sec_erase_mult =
485 ext_csd[EXT_CSD_SEC_ERASE_MULT];
486 card->ext_csd.sec_feature_support =
487 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
488 card->ext_csd.trim_timeout = 300 *
489 ext_csd[EXT_CSD_TRIM_MULT];
490
491 /*
492 * Note that the call to mmc_part_add above defaults to read
493 * only. If this default assumption is changed, the call must
494 * take into account the value of boot_locked below.
495 */
496 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
497 card->ext_csd.boot_ro_lockable = true;
498
499 /* Save power class values */
500 card->ext_csd.raw_pwr_cl_52_195 =
501 ext_csd[EXT_CSD_PWR_CL_52_195];
502 card->ext_csd.raw_pwr_cl_26_195 =
503 ext_csd[EXT_CSD_PWR_CL_26_195];
504 card->ext_csd.raw_pwr_cl_52_360 =
505 ext_csd[EXT_CSD_PWR_CL_52_360];
506 card->ext_csd.raw_pwr_cl_26_360 =
507 ext_csd[EXT_CSD_PWR_CL_26_360];
508 card->ext_csd.raw_pwr_cl_200_195 =
509 ext_csd[EXT_CSD_PWR_CL_200_195];
510 card->ext_csd.raw_pwr_cl_200_360 =
511 ext_csd[EXT_CSD_PWR_CL_200_360];
512 card->ext_csd.raw_pwr_cl_ddr_52_195 =
513 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
514 card->ext_csd.raw_pwr_cl_ddr_52_360 =
515 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
516 card->ext_csd.raw_pwr_cl_ddr_200_360 =
517 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
518 }
519
520 if (card->ext_csd.rev >= 5) {
521 /* Adjust production date as per JEDEC JESD84-B451 */
522 if (card->cid.year < 2010)
523 card->cid.year += 16;
524
525 /* check whether the eMMC card supports BKOPS */
526 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
527 card->ext_csd.bkops = 1;
528 card->ext_csd.man_bkops_en =
529 (ext_csd[EXT_CSD_BKOPS_EN] &
530 EXT_CSD_MANUAL_BKOPS_MASK);
531 card->ext_csd.raw_bkops_status =
532 ext_csd[EXT_CSD_BKOPS_STATUS];
533 if (card->ext_csd.man_bkops_en)
534 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
535 mmc_hostname(card->host));
536 card->ext_csd.auto_bkops_en =
537 (ext_csd[EXT_CSD_BKOPS_EN] &
538 EXT_CSD_AUTO_BKOPS_MASK);
539 if (card->ext_csd.auto_bkops_en)
540 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
541 mmc_hostname(card->host));
542 }
543
544 /* check whether the eMMC card supports HPI */
545 if (!mmc_card_broken_hpi(card) &&
546 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
547 card->ext_csd.hpi = 1;
548 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
549 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
550 else
551 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
552 /*
553 * Indicate the maximum timeout to close
554 * a command interrupted by HPI
555 */
556 card->ext_csd.out_of_int_time =
557 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
558 }
559
560 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
561 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
562
563 /*
564 * RPMB regions are defined in multiples of 128K.
565 */
566 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
567 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
568 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
569 EXT_CSD_PART_CONFIG_ACC_RPMB,
570 "rpmb", 0, false,
571 MMC_BLK_DATA_AREA_RPMB);
572 }
573 }
574
575 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
576 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
577 card->erased_byte = 0xFF;
578 else
579 card->erased_byte = 0x0;
580
581 /* eMMC v4.5 or later */
582 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
583 if (card->ext_csd.rev >= 6) {
584 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
585
586 card->ext_csd.generic_cmd6_time = 10 *
587 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
588 card->ext_csd.power_off_longtime = 10 *
589 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
590
591 card->ext_csd.cache_size =
592 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
593 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
594 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
595 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
596
597 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
598 card->ext_csd.data_sector_size = 4096;
599 else
600 card->ext_csd.data_sector_size = 512;
601
602 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
603 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
604 card->ext_csd.data_tag_unit_size =
605 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
606 (card->ext_csd.data_sector_size);
607 } else {
608 card->ext_csd.data_tag_unit_size = 0;
609 }
610
611 card->ext_csd.max_packed_writes =
612 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
613 card->ext_csd.max_packed_reads =
614 ext_csd[EXT_CSD_MAX_PACKED_READS];
615 } else {
616 card->ext_csd.data_sector_size = 512;
617 }
618
619 /* eMMC v5 or later */
620 if (card->ext_csd.rev >= 7) {
621 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
622 MMC_FIRMWARE_LEN);
623 card->ext_csd.ffu_capable =
624 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
625 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
626
627 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
628 card->ext_csd.device_life_time_est_typ_a =
629 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
630 card->ext_csd.device_life_time_est_typ_b =
631 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
632 }
633
634 /* eMMC v5.1 or later */
635 if (card->ext_csd.rev >= 8) {
636 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
637 EXT_CSD_CMDQ_SUPPORTED;
638 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
639 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
640 /* Exclude inefficiently small queue depths */
641 if (card->ext_csd.cmdq_depth <= 2) {
642 card->ext_csd.cmdq_support = false;
643 card->ext_csd.cmdq_depth = 0;
644 }
645 if (card->ext_csd.cmdq_support) {
646 pr_debug("%s: Command Queue supported depth %u\n",
647 mmc_hostname(card->host),
648 card->ext_csd.cmdq_depth);
649 }
650 card->ext_csd.enhanced_rpmb_supported =
651 (card->ext_csd.rel_param &
652 EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR);
653 }
654 out:
655 return err;
656 }
657
658 static int mmc_read_ext_csd(struct mmc_card *card)
659 {
660 u8 *ext_csd;
661 int err;
662
663 if (!mmc_can_ext_csd(card))
664 return 0;
665
666 err = mmc_get_ext_csd(card, &ext_csd);
667 if (err) {
668 /* If the host or the card can't do the switch,
669 * fail more gracefully. */
670 if ((err != -EINVAL)
671 && (err != -ENOSYS)
672 && (err != -EFAULT))
673 return err;
674
675 /*
676 * High capacity cards should have this "magic" size
677 * stored in their CSD.
678 */
679 if (card->csd.capacity == (4096 * 512)) {
680 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
681 mmc_hostname(card->host));
682 } else {
683 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
684 mmc_hostname(card->host));
685 err = 0;
686 }
687
688 return err;
689 }
690
691 err = mmc_decode_ext_csd(card, ext_csd);
692 kfree(ext_csd);
693 return err;
694 }
695
696 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
697 {
698 u8 *bw_ext_csd;
699 int err;
700
701 if (bus_width == MMC_BUS_WIDTH_1)
702 return 0;
703
704 err = mmc_get_ext_csd(card, &bw_ext_csd);
705 if (err)
706 return err;
707
708 /* only compare read only fields */
709 err = !((card->ext_csd.raw_partition_support ==
710 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
711 (card->ext_csd.raw_erased_mem_count ==
712 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
713 (card->ext_csd.rev ==
714 bw_ext_csd[EXT_CSD_REV]) &&
715 (card->ext_csd.raw_ext_csd_structure ==
716 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
717 (card->ext_csd.raw_card_type ==
718 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
719 (card->ext_csd.raw_s_a_timeout ==
720 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
721 (card->ext_csd.raw_hc_erase_gap_size ==
722 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
723 (card->ext_csd.raw_erase_timeout_mult ==
724 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
725 (card->ext_csd.raw_hc_erase_grp_size ==
726 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
727 (card->ext_csd.raw_sec_trim_mult ==
728 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
729 (card->ext_csd.raw_sec_erase_mult ==
730 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
731 (card->ext_csd.raw_sec_feature_support ==
732 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
733 (card->ext_csd.raw_trim_mult ==
734 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
735 (card->ext_csd.raw_sectors[0] ==
736 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
737 (card->ext_csd.raw_sectors[1] ==
738 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
739 (card->ext_csd.raw_sectors[2] ==
740 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
741 (card->ext_csd.raw_sectors[3] ==
742 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
743 (card->ext_csd.raw_pwr_cl_52_195 ==
744 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
745 (card->ext_csd.raw_pwr_cl_26_195 ==
746 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
747 (card->ext_csd.raw_pwr_cl_52_360 ==
748 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
749 (card->ext_csd.raw_pwr_cl_26_360 ==
750 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
751 (card->ext_csd.raw_pwr_cl_200_195 ==
752 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
753 (card->ext_csd.raw_pwr_cl_200_360 ==
754 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
755 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
756 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
757 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
758 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
759 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
760 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
761
762 if (err)
763 err = -EINVAL;
764
765 kfree(bw_ext_csd);
766 return err;
767 }
768
769 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
770 card->raw_cid[2], card->raw_cid[3]);
771 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
772 card->raw_csd[2], card->raw_csd[3]);
773 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
774 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
775 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
776 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
777 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
778 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
779 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
780 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
781 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
782 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
783 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
784 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
785 card->ext_csd.device_life_time_est_typ_a,
786 card->ext_csd.device_life_time_est_typ_b);
787 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
788 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
789 card->ext_csd.enhanced_area_offset);
790 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
791 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
792 MMC_DEV_ATTR(enhanced_rpmb_supported, "%#x\n",
793 card->ext_csd.enhanced_rpmb_supported);
794 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
795 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
796 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
797 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
798
799 static ssize_t mmc_fwrev_show(struct device *dev,
800 struct device_attribute *attr,
801 char *buf)
802 {
803 struct mmc_card *card = mmc_dev_to_card(dev);
804
805 if (card->ext_csd.rev < 7) {
806 return sprintf(buf, "0x%x\n", card->cid.fwrev);
807 } else {
808 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
809 card->ext_csd.fwrev);
810 }
811 }
812
813 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
814
815 static ssize_t mmc_dsr_show(struct device *dev,
816 struct device_attribute *attr,
817 char *buf)
818 {
819 struct mmc_card *card = mmc_dev_to_card(dev);
820 struct mmc_host *host = card->host;
821
822 if (card->csd.dsr_imp && host->dsr_req)
823 return sprintf(buf, "0x%x\n", host->dsr);
824 else
825 /* return default DSR value */
826 return sprintf(buf, "0x%x\n", 0x404);
827 }
828
829 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
830
831 static struct attribute *mmc_std_attrs[] = {
832 &dev_attr_cid.attr,
833 &dev_attr_csd.attr,
834 &dev_attr_date.attr,
835 &dev_attr_erase_size.attr,
836 &dev_attr_preferred_erase_size.attr,
837 &dev_attr_fwrev.attr,
838 &dev_attr_ffu_capable.attr,
839 &dev_attr_hwrev.attr,
840 &dev_attr_manfid.attr,
841 &dev_attr_name.attr,
842 &dev_attr_oemid.attr,
843 &dev_attr_prv.attr,
844 &dev_attr_rev.attr,
845 &dev_attr_pre_eol_info.attr,
846 &dev_attr_life_time.attr,
847 &dev_attr_serial.attr,
848 &dev_attr_enhanced_area_offset.attr,
849 &dev_attr_enhanced_area_size.attr,
850 &dev_attr_raw_rpmb_size_mult.attr,
851 &dev_attr_enhanced_rpmb_supported.attr,
852 &dev_attr_rel_sectors.attr,
853 &dev_attr_ocr.attr,
854 &dev_attr_rca.attr,
855 &dev_attr_dsr.attr,
856 &dev_attr_cmdq_en.attr,
857 NULL,
858 };
859 ATTRIBUTE_GROUPS(mmc_std);
860
861 static struct device_type mmc_type = {
862 .groups = mmc_std_groups,
863 };
864
865 /*
866 * Select the PowerClass for the current bus width
867 * If power class is defined for 4/8 bit bus in the
868 * extended CSD register, select it by executing the
869 * mmc_switch command.
870 */
871 static int __mmc_select_powerclass(struct mmc_card *card,
872 unsigned int bus_width)
873 {
874 struct mmc_host *host = card->host;
875 struct mmc_ext_csd *ext_csd = &card->ext_csd;
876 unsigned int pwrclass_val = 0;
877 int err = 0;
878
879 switch (1 << host->ios.vdd) {
880 case MMC_VDD_165_195:
881 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
882 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
883 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
884 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
885 ext_csd->raw_pwr_cl_52_195 :
886 ext_csd->raw_pwr_cl_ddr_52_195;
887 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
888 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
889 break;
890 case MMC_VDD_27_28:
891 case MMC_VDD_28_29:
892 case MMC_VDD_29_30:
893 case MMC_VDD_30_31:
894 case MMC_VDD_31_32:
895 case MMC_VDD_32_33:
896 case MMC_VDD_33_34:
897 case MMC_VDD_34_35:
898 case MMC_VDD_35_36:
899 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
900 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
901 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
902 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
903 ext_csd->raw_pwr_cl_52_360 :
904 ext_csd->raw_pwr_cl_ddr_52_360;
905 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
906 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
907 ext_csd->raw_pwr_cl_ddr_200_360 :
908 ext_csd->raw_pwr_cl_200_360;
909 break;
910 default:
911 pr_warn("%s: Voltage range not supported for power class\n",
912 mmc_hostname(host));
913 return -EINVAL;
914 }
915
916 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
917 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
918 EXT_CSD_PWR_CL_8BIT_SHIFT;
919 else
920 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
921 EXT_CSD_PWR_CL_4BIT_SHIFT;
922
923 /* If the power class is different from the default value */
924 if (pwrclass_val > 0) {
925 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
926 EXT_CSD_POWER_CLASS,
927 pwrclass_val,
928 card->ext_csd.generic_cmd6_time);
929 }
930
931 return err;
932 }
933
934 static int mmc_select_powerclass(struct mmc_card *card)
935 {
936 struct mmc_host *host = card->host;
937 u32 bus_width, ext_csd_bits;
938 int err, ddr;
939
940 /* Power class selection is supported for versions >= 4.0 */
941 if (!mmc_can_ext_csd(card))
942 return 0;
943
944 bus_width = host->ios.bus_width;
945 /* Power class values are defined only for 4/8 bit bus */
946 if (bus_width == MMC_BUS_WIDTH_1)
947 return 0;
948
949 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
950 if (ddr)
951 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
952 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
953 else
954 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
955 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
956
957 err = __mmc_select_powerclass(card, ext_csd_bits);
958 if (err)
959 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
960 mmc_hostname(host), 1 << bus_width, ddr);
961
962 return err;
963 }
964
965 /*
966 * Set the bus speed for the selected speed mode.
967 */
968 static void mmc_set_bus_speed(struct mmc_card *card)
969 {
970 unsigned int max_dtr = (unsigned int)-1;
971
972 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
973 max_dtr > card->ext_csd.hs200_max_dtr)
974 max_dtr = card->ext_csd.hs200_max_dtr;
975 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
976 max_dtr = card->ext_csd.hs_max_dtr;
977 else if (max_dtr > card->csd.max_dtr)
978 max_dtr = card->csd.max_dtr;
979
980 mmc_set_clock(card->host, max_dtr);
981 }
982
983 /*
984 * Select the bus width amoung 4-bit and 8-bit(SDR).
985 * If the bus width is changed successfully, return the selected width value.
986 * Zero is returned instead of error value if the wide width is not supported.
987 */
988 static int mmc_select_bus_width(struct mmc_card *card)
989 {
990 static unsigned ext_csd_bits[] = {
991 EXT_CSD_BUS_WIDTH_8,
992 EXT_CSD_BUS_WIDTH_4,
993 };
994 static unsigned bus_widths[] = {
995 MMC_BUS_WIDTH_8,
996 MMC_BUS_WIDTH_4,
997 };
998 struct mmc_host *host = card->host;
999 unsigned idx, bus_width = 0;
1000 int err = 0;
1001
1002 if (!mmc_can_ext_csd(card) ||
1003 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1004 return 0;
1005
1006 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1007
1008 /*
1009 * Unlike SD, MMC cards dont have a configuration register to notify
1010 * supported bus width. So bus test command should be run to identify
1011 * the supported bus width or compare the ext csd values of current
1012 * bus width and ext csd values of 1 bit mode read earlier.
1013 */
1014 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1015 /*
1016 * Host is capable of 8bit transfer, then switch
1017 * the device to work in 8bit transfer mode. If the
1018 * mmc switch command returns error then switch to
1019 * 4bit transfer mode. On success set the corresponding
1020 * bus width on the host.
1021 */
1022 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1023 EXT_CSD_BUS_WIDTH,
1024 ext_csd_bits[idx],
1025 card->ext_csd.generic_cmd6_time);
1026 if (err)
1027 continue;
1028
1029 bus_width = bus_widths[idx];
1030 mmc_set_bus_width(host, bus_width);
1031
1032 /*
1033 * If controller can't handle bus width test,
1034 * compare ext_csd previously read in 1 bit mode
1035 * against ext_csd at new bus width
1036 */
1037 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1038 err = mmc_compare_ext_csds(card, bus_width);
1039 else
1040 err = mmc_bus_test(card, bus_width);
1041
1042 if (!err) {
1043 err = bus_width;
1044 break;
1045 } else {
1046 pr_warn("%s: switch to bus width %d failed\n",
1047 mmc_hostname(host), 1 << bus_width);
1048 }
1049 }
1050
1051 return err;
1052 }
1053
1054 /*
1055 * Switch to the high-speed mode
1056 */
1057 static int mmc_select_hs(struct mmc_card *card)
1058 {
1059 int err;
1060
1061 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1062 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1063 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1064 true, true);
1065 if (err)
1066 pr_warn("%s: switch to high-speed failed, err:%d\n",
1067 mmc_hostname(card->host), err);
1068
1069 return err;
1070 }
1071
1072 /*
1073 * Activate wide bus and DDR if supported.
1074 */
1075 static int mmc_select_hs_ddr(struct mmc_card *card)
1076 {
1077 struct mmc_host *host = card->host;
1078 u32 bus_width, ext_csd_bits;
1079 int err = 0;
1080
1081 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1082 return 0;
1083
1084 bus_width = host->ios.bus_width;
1085 if (bus_width == MMC_BUS_WIDTH_1)
1086 return 0;
1087
1088 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1089 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1090
1091 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1092 EXT_CSD_BUS_WIDTH,
1093 ext_csd_bits,
1094 card->ext_csd.generic_cmd6_time,
1095 MMC_TIMING_MMC_DDR52,
1096 true, true);
1097 if (err) {
1098 pr_err("%s: switch to bus width %d ddr failed\n",
1099 mmc_hostname(host), 1 << bus_width);
1100 return err;
1101 }
1102
1103 /*
1104 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1105 * signaling.
1106 *
1107 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1108 *
1109 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1110 * in the JEDEC spec for DDR.
1111 *
1112 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1113 * host controller can support this, like some of the SDHCI
1114 * controller which connect to an eMMC device. Some of these
1115 * host controller still needs to use 1.8v vccq for supporting
1116 * DDR mode.
1117 *
1118 * So the sequence will be:
1119 * if (host and device can both support 1.2v IO)
1120 * use 1.2v IO;
1121 * else if (host and device can both support 1.8v IO)
1122 * use 1.8v IO;
1123 * so if host and device can only support 3.3v IO, this is the
1124 * last choice.
1125 *
1126 * WARNING: eMMC rules are NOT the same as SD DDR
1127 */
1128 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1129 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1130 if (!err)
1131 return 0;
1132 }
1133
1134 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1135 host->caps & MMC_CAP_1_8V_DDR)
1136 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1137
1138 /* make sure vccq is 3.3v after switching disaster */
1139 if (err)
1140 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1141
1142 return err;
1143 }
1144
1145 static int mmc_select_hs400(struct mmc_card *card)
1146 {
1147 struct mmc_host *host = card->host;
1148 unsigned int max_dtr;
1149 int err = 0;
1150 u8 val;
1151
1152 /*
1153 * HS400 mode requires 8-bit bus width
1154 */
1155 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1156 host->ios.bus_width == MMC_BUS_WIDTH_8))
1157 return 0;
1158
1159 /* Switch card to HS mode */
1160 val = EXT_CSD_TIMING_HS;
1161 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1162 EXT_CSD_HS_TIMING, val,
1163 card->ext_csd.generic_cmd6_time, 0,
1164 false, true);
1165 if (err) {
1166 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1167 mmc_hostname(host), err);
1168 return err;
1169 }
1170
1171 /* Prepare host to downgrade to HS timing */
1172 if (host->ops->hs400_downgrade)
1173 host->ops->hs400_downgrade(host);
1174
1175 /* Set host controller to HS timing */
1176 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1177
1178 /* Reduce frequency to HS frequency */
1179 max_dtr = card->ext_csd.hs_max_dtr;
1180 mmc_set_clock(host, max_dtr);
1181
1182 err = mmc_switch_status(card, true);
1183 if (err)
1184 goto out_err;
1185
1186 if (host->ops->hs400_prepare_ddr)
1187 host->ops->hs400_prepare_ddr(host);
1188
1189 /* Switch card to DDR */
1190 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1191 EXT_CSD_BUS_WIDTH,
1192 EXT_CSD_DDR_BUS_WIDTH_8,
1193 card->ext_csd.generic_cmd6_time);
1194 if (err) {
1195 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1196 mmc_hostname(host), err);
1197 return err;
1198 }
1199
1200 /* Switch card to HS400 */
1201 val = EXT_CSD_TIMING_HS400 |
1202 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1203 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1204 EXT_CSD_HS_TIMING, val,
1205 card->ext_csd.generic_cmd6_time, 0,
1206 false, true);
1207 if (err) {
1208 pr_err("%s: switch to hs400 failed, err:%d\n",
1209 mmc_hostname(host), err);
1210 return err;
1211 }
1212
1213 /* Set host controller to HS400 timing and frequency */
1214 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1215 mmc_set_bus_speed(card);
1216
1217 if (host->ops->hs400_complete)
1218 host->ops->hs400_complete(host);
1219
1220 err = mmc_switch_status(card, true);
1221 if (err)
1222 goto out_err;
1223
1224 return 0;
1225
1226 out_err:
1227 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1228 __func__, err);
1229 return err;
1230 }
1231
1232 int mmc_hs200_to_hs400(struct mmc_card *card)
1233 {
1234 return mmc_select_hs400(card);
1235 }
1236
1237 int mmc_hs400_to_hs200(struct mmc_card *card)
1238 {
1239 struct mmc_host *host = card->host;
1240 unsigned int max_dtr;
1241 int err;
1242 u8 val;
1243
1244 /* Reduce frequency to HS */
1245 max_dtr = card->ext_csd.hs_max_dtr;
1246 mmc_set_clock(host, max_dtr);
1247
1248 /* Switch HS400 to HS DDR */
1249 val = EXT_CSD_TIMING_HS;
1250 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1251 val, card->ext_csd.generic_cmd6_time, 0,
1252 false, true);
1253 if (err)
1254 goto out_err;
1255
1256 if (host->ops->hs400_downgrade)
1257 host->ops->hs400_downgrade(host);
1258
1259 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1260
1261 err = mmc_switch_status(card, true);
1262 if (err)
1263 goto out_err;
1264
1265 /* Switch HS DDR to HS */
1266 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1267 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1268 0, false, true);
1269 if (err)
1270 goto out_err;
1271
1272 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1273
1274 err = mmc_switch_status(card, true);
1275 if (err)
1276 goto out_err;
1277
1278 /* Switch HS to HS200 */
1279 val = EXT_CSD_TIMING_HS200 |
1280 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1281 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1282 val, card->ext_csd.generic_cmd6_time, 0,
1283 false, true);
1284 if (err)
1285 goto out_err;
1286
1287 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1288
1289 /*
1290 * For HS200, CRC errors are not a reliable way to know the switch
1291 * failed. If there really is a problem, we would expect tuning will
1292 * fail and the result ends up the same.
1293 */
1294 err = mmc_switch_status(card, false);
1295 if (err)
1296 goto out_err;
1297
1298 mmc_set_bus_speed(card);
1299
1300 /* Prepare tuning for HS400 mode. */
1301 if (host->ops->prepare_hs400_tuning)
1302 host->ops->prepare_hs400_tuning(host, &host->ios);
1303
1304 return 0;
1305
1306 out_err:
1307 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1308 __func__, err);
1309 return err;
1310 }
1311
1312 static void mmc_select_driver_type(struct mmc_card *card)
1313 {
1314 int card_drv_type, drive_strength, drv_type = 0;
1315 int fixed_drv_type = card->host->fixed_drv_type;
1316
1317 card_drv_type = card->ext_csd.raw_driver_strength |
1318 mmc_driver_type_mask(0);
1319
1320 if (fixed_drv_type >= 0)
1321 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1322 ? fixed_drv_type : 0;
1323 else
1324 drive_strength = mmc_select_drive_strength(card,
1325 card->ext_csd.hs200_max_dtr,
1326 card_drv_type, &drv_type);
1327
1328 card->drive_strength = drive_strength;
1329
1330 if (drv_type)
1331 mmc_set_driver_type(card->host, drv_type);
1332 }
1333
1334 static int mmc_select_hs400es(struct mmc_card *card)
1335 {
1336 struct mmc_host *host = card->host;
1337 int err = -EINVAL;
1338 u8 val;
1339
1340 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1341 err = -ENOTSUPP;
1342 goto out_err;
1343 }
1344
1345 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1346 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1347
1348 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1349 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1350
1351 /* If fails try again during next card power cycle */
1352 if (err)
1353 goto out_err;
1354
1355 err = mmc_select_bus_width(card);
1356 if (err != MMC_BUS_WIDTH_8) {
1357 pr_err("%s: switch to 8bit bus width failed, err:%d\n",
1358 mmc_hostname(host), err);
1359 err = err < 0 ? err : -ENOTSUPP;
1360 goto out_err;
1361 }
1362
1363 /* Switch card to HS mode */
1364 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1365 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1366 card->ext_csd.generic_cmd6_time, 0,
1367 false, true);
1368 if (err) {
1369 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1370 mmc_hostname(host), err);
1371 goto out_err;
1372 }
1373
1374 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1375 err = mmc_switch_status(card, true);
1376 if (err)
1377 goto out_err;
1378
1379 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1380
1381 /* Switch card to DDR with strobe bit */
1382 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1383 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1384 EXT_CSD_BUS_WIDTH,
1385 val,
1386 card->ext_csd.generic_cmd6_time);
1387 if (err) {
1388 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1389 mmc_hostname(host), err);
1390 goto out_err;
1391 }
1392
1393 mmc_select_driver_type(card);
1394
1395 /* Switch card to HS400 */
1396 val = EXT_CSD_TIMING_HS400 |
1397 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1398 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1399 EXT_CSD_HS_TIMING, val,
1400 card->ext_csd.generic_cmd6_time, 0,
1401 false, true);
1402 if (err) {
1403 pr_err("%s: switch to hs400es failed, err:%d\n",
1404 mmc_hostname(host), err);
1405 goto out_err;
1406 }
1407
1408 /* Set host controller to HS400 timing and frequency */
1409 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1410
1411 /* Controller enable enhanced strobe function */
1412 host->ios.enhanced_strobe = true;
1413 if (host->ops->hs400_enhanced_strobe)
1414 host->ops->hs400_enhanced_strobe(host, &host->ios);
1415
1416 err = mmc_switch_status(card, true);
1417 if (err)
1418 goto out_err;
1419
1420 return 0;
1421
1422 out_err:
1423 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1424 __func__, err);
1425 return err;
1426 }
1427
1428 /*
1429 * For device supporting HS200 mode, the following sequence
1430 * should be done before executing the tuning process.
1431 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1432 * 2. switch to HS200 mode
1433 * 3. set the clock to > 52Mhz and <=200MHz
1434 */
1435 static int mmc_select_hs200(struct mmc_card *card)
1436 {
1437 struct mmc_host *host = card->host;
1438 unsigned int old_timing, old_signal_voltage;
1439 int err = -EINVAL;
1440 u8 val;
1441
1442 old_signal_voltage = host->ios.signal_voltage;
1443 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1444 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1445
1446 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1447 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1448
1449 /* If fails try again during next card power cycle */
1450 if (err)
1451 return err;
1452
1453 mmc_select_driver_type(card);
1454
1455 /*
1456 * Set the bus width(4 or 8) with host's support and
1457 * switch to HS200 mode if bus width is set successfully.
1458 */
1459 err = mmc_select_bus_width(card);
1460 if (err > 0) {
1461 val = EXT_CSD_TIMING_HS200 |
1462 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1463 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1464 EXT_CSD_HS_TIMING, val,
1465 card->ext_csd.generic_cmd6_time, 0,
1466 false, true);
1467 if (err)
1468 goto err;
1469 old_timing = host->ios.timing;
1470 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1471
1472 /*
1473 * For HS200, CRC errors are not a reliable way to know the
1474 * switch failed. If there really is a problem, we would expect
1475 * tuning will fail and the result ends up the same.
1476 */
1477 err = mmc_switch_status(card, false);
1478
1479 /*
1480 * mmc_select_timing() assumes timing has not changed if
1481 * it is a switch error.
1482 */
1483 if (err == -EBADMSG)
1484 mmc_set_timing(host, old_timing);
1485 }
1486 err:
1487 if (err) {
1488 /* fall back to the old signal voltage, if fails report error */
1489 if (mmc_set_signal_voltage(host, old_signal_voltage))
1490 err = -EIO;
1491
1492 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1493 __func__, err);
1494 }
1495 return err;
1496 }
1497
1498 /*
1499 * Activate High Speed, HS200 or HS400ES mode if supported.
1500 */
1501 static int mmc_select_timing(struct mmc_card *card)
1502 {
1503 int err = 0;
1504
1505 if (!mmc_can_ext_csd(card))
1506 goto bus_speed;
1507
1508 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1509 err = mmc_select_hs400es(card);
1510 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1511 err = mmc_select_hs200(card);
1512 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1513 err = mmc_select_hs(card);
1514
1515 if (err && err != -EBADMSG)
1516 return err;
1517
1518 bus_speed:
1519 /*
1520 * Set the bus speed to the selected bus timing.
1521 * If timing is not selected, backward compatible is the default.
1522 */
1523 mmc_set_bus_speed(card);
1524 return 0;
1525 }
1526
1527 /*
1528 * Execute tuning sequence to seek the proper bus operating
1529 * conditions for HS200 and HS400, which sends CMD21 to the device.
1530 */
1531 static int mmc_hs200_tuning(struct mmc_card *card)
1532 {
1533 struct mmc_host *host = card->host;
1534
1535 /*
1536 * Timing should be adjusted to the HS400 target
1537 * operation frequency for tuning process
1538 */
1539 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1540 host->ios.bus_width == MMC_BUS_WIDTH_8)
1541 if (host->ops->prepare_hs400_tuning)
1542 host->ops->prepare_hs400_tuning(host, &host->ios);
1543
1544 return mmc_execute_tuning(card);
1545 }
1546
1547 /*
1548 * Handle the detection and initialisation of a card.
1549 *
1550 * In the case of a resume, "oldcard" will contain the card
1551 * we're trying to reinitialise.
1552 */
1553 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1554 struct mmc_card *oldcard)
1555 {
1556 struct mmc_card *card;
1557 int err;
1558 u32 cid[4];
1559 u32 rocr;
1560
1561 WARN_ON(!host->claimed);
1562
1563 /* Set correct bus mode for MMC before attempting init */
1564 if (!mmc_host_is_spi(host))
1565 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1566
1567 /*
1568 * Since we're changing the OCR value, we seem to
1569 * need to tell some cards to go back to the idle
1570 * state. We wait 1ms to give cards time to
1571 * respond.
1572 * mmc_go_idle is needed for eMMC that are asleep
1573 */
1574 mmc_go_idle(host);
1575
1576 /* The extra bit indicates that we support high capacity */
1577 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1578 if (err)
1579 goto err;
1580
1581 /*
1582 * For SPI, enable CRC as appropriate.
1583 */
1584 if (mmc_host_is_spi(host)) {
1585 err = mmc_spi_set_crc(host, use_spi_crc);
1586 if (err)
1587 goto err;
1588 }
1589
1590 /*
1591 * Fetch CID from card.
1592 */
1593 err = mmc_send_cid(host, cid);
1594 if (err)
1595 goto err;
1596
1597 if (oldcard) {
1598 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1599 pr_debug("%s: Perhaps the card was replaced\n",
1600 mmc_hostname(host));
1601 err = -ENOENT;
1602 goto err;
1603 }
1604
1605 card = oldcard;
1606 } else {
1607 /*
1608 * Allocate card structure.
1609 */
1610 card = mmc_alloc_card(host, &mmc_type);
1611 if (IS_ERR(card)) {
1612 err = PTR_ERR(card);
1613 goto err;
1614 }
1615
1616 card->ocr = ocr;
1617 card->type = MMC_TYPE_MMC;
1618 card->rca = 1;
1619 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1620 }
1621
1622 /*
1623 * Call the optional HC's init_card function to handle quirks.
1624 */
1625 if (host->ops->init_card)
1626 host->ops->init_card(host, card);
1627
1628 /*
1629 * For native busses: set card RCA and quit open drain mode.
1630 */
1631 if (!mmc_host_is_spi(host)) {
1632 err = mmc_set_relative_addr(card);
1633 if (err)
1634 goto free_card;
1635
1636 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1637 }
1638
1639 if (!oldcard) {
1640 /*
1641 * Fetch CSD from card.
1642 */
1643 err = mmc_send_csd(card, card->raw_csd);
1644 if (err)
1645 goto free_card;
1646
1647 err = mmc_decode_csd(card);
1648 if (err)
1649 goto free_card;
1650 err = mmc_decode_cid(card);
1651 if (err)
1652 goto free_card;
1653 }
1654
1655 /*
1656 * handling only for cards supporting DSR and hosts requesting
1657 * DSR configuration
1658 */
1659 if (card->csd.dsr_imp && host->dsr_req)
1660 mmc_set_dsr(host);
1661
1662 /*
1663 * Select card, as all following commands rely on that.
1664 */
1665 if (!mmc_host_is_spi(host)) {
1666 err = mmc_select_card(card);
1667 if (err)
1668 goto free_card;
1669 }
1670
1671 if (!oldcard) {
1672 /* Read extended CSD. */
1673 err = mmc_read_ext_csd(card);
1674 if (err)
1675 goto free_card;
1676
1677 /*
1678 * If doing byte addressing, check if required to do sector
1679 * addressing. Handle the case of <2GB cards needing sector
1680 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1681 * ocr register has bit 30 set for sector addressing.
1682 */
1683 if (rocr & BIT(30))
1684 mmc_card_set_blockaddr(card);
1685
1686 /* Erase size depends on CSD and Extended CSD */
1687 mmc_set_erase_size(card);
1688 }
1689
1690 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1691 if (card->ext_csd.rev >= 3) {
1692 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1693 EXT_CSD_ERASE_GROUP_DEF, 1,
1694 card->ext_csd.generic_cmd6_time);
1695
1696 if (err && err != -EBADMSG)
1697 goto free_card;
1698
1699 if (err) {
1700 err = 0;
1701 /*
1702 * Just disable enhanced area off & sz
1703 * will try to enable ERASE_GROUP_DEF
1704 * during next time reinit
1705 */
1706 card->ext_csd.enhanced_area_offset = -EINVAL;
1707 card->ext_csd.enhanced_area_size = -EINVAL;
1708 } else {
1709 card->ext_csd.erase_group_def = 1;
1710 /*
1711 * enable ERASE_GRP_DEF successfully.
1712 * This will affect the erase size, so
1713 * here need to reset erase size
1714 */
1715 mmc_set_erase_size(card);
1716 }
1717 }
1718
1719 /*
1720 * Ensure eMMC user default partition is enabled
1721 */
1722 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1723 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1724 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1725 card->ext_csd.part_config,
1726 card->ext_csd.part_time);
1727 if (err && err != -EBADMSG)
1728 goto free_card;
1729 }
1730
1731 /*
1732 * Enable power_off_notification byte in the ext_csd register
1733 */
1734 if (card->ext_csd.rev >= 6) {
1735 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1736 EXT_CSD_POWER_OFF_NOTIFICATION,
1737 EXT_CSD_POWER_ON,
1738 card->ext_csd.generic_cmd6_time);
1739 if (err && err != -EBADMSG)
1740 goto free_card;
1741
1742 /*
1743 * The err can be -EBADMSG or 0,
1744 * so check for success and update the flag
1745 */
1746 if (!err)
1747 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1748 }
1749
1750 /* set erase_arg */
1751 if (mmc_can_discard(card))
1752 card->erase_arg = MMC_DISCARD_ARG;
1753 else if (mmc_can_trim(card))
1754 card->erase_arg = MMC_TRIM_ARG;
1755 else
1756 card->erase_arg = MMC_ERASE_ARG;
1757
1758 /*
1759 * Select timing interface
1760 */
1761 err = mmc_select_timing(card);
1762 if (err)
1763 goto free_card;
1764
1765 if (mmc_card_hs200(card)) {
1766 host->doing_init_tune = 1;
1767
1768 err = mmc_hs200_tuning(card);
1769 if (!err)
1770 err = mmc_select_hs400(card);
1771
1772 host->doing_init_tune = 0;
1773
1774 if (err)
1775 goto free_card;
1776
1777 } else if (!mmc_card_hs400es(card)) {
1778 /* Select the desired bus width optionally */
1779 err = mmc_select_bus_width(card);
1780 if (err > 0 && mmc_card_hs(card)) {
1781 err = mmc_select_hs_ddr(card);
1782 if (err)
1783 goto free_card;
1784 }
1785 }
1786
1787 /*
1788 * Choose the power class with selected bus interface
1789 */
1790 mmc_select_powerclass(card);
1791
1792 /*
1793 * Enable HPI feature (if supported)
1794 */
1795 if (card->ext_csd.hpi) {
1796 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1797 EXT_CSD_HPI_MGMT, 1,
1798 card->ext_csd.generic_cmd6_time);
1799 if (err && err != -EBADMSG)
1800 goto free_card;
1801 if (err) {
1802 pr_warn("%s: Enabling HPI failed\n",
1803 mmc_hostname(card->host));
1804 card->ext_csd.hpi_en = 0;
1805 err = 0;
1806 } else {
1807 card->ext_csd.hpi_en = 1;
1808 }
1809 }
1810
1811 /*
1812 * If cache size is higher than 0, this indicates the existence of cache
1813 * and it can be turned on. Note that some eMMCs from Micron has been
1814 * reported to need ~800 ms timeout, while enabling the cache after
1815 * sudden power failure tests. Let's extend the timeout to a minimum of
1816 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
1817 */
1818 if (card->ext_csd.cache_size > 0) {
1819 unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
1820
1821 timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
1822 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1823 EXT_CSD_CACHE_CTRL, 1, timeout_ms);
1824 if (err && err != -EBADMSG)
1825 goto free_card;
1826
1827 /*
1828 * Only if no error, cache is turned on successfully.
1829 */
1830 if (err) {
1831 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1832 mmc_hostname(card->host), err);
1833 card->ext_csd.cache_ctrl = 0;
1834 err = 0;
1835 } else {
1836 card->ext_csd.cache_ctrl = 1;
1837 }
1838 }
1839
1840 /*
1841 * Enable Command Queue if supported. Note that Packed Commands cannot
1842 * be used with Command Queue.
1843 */
1844 card->ext_csd.cmdq_en = false;
1845 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1846 err = mmc_cmdq_enable(card);
1847 if (err && err != -EBADMSG)
1848 goto free_card;
1849 if (err) {
1850 pr_warn("%s: Enabling CMDQ failed\n",
1851 mmc_hostname(card->host));
1852 card->ext_csd.cmdq_support = false;
1853 card->ext_csd.cmdq_depth = 0;
1854 err = 0;
1855 }
1856 }
1857 /*
1858 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1859 * disabled for a time, so a flag is needed to indicate to re-enable the
1860 * Command Queue.
1861 */
1862 card->reenable_cmdq = card->ext_csd.cmdq_en;
1863
1864 if (host->cqe_ops && !host->cqe_enabled) {
1865 err = host->cqe_ops->cqe_enable(host, card);
1866 if (!err) {
1867 host->cqe_enabled = true;
1868
1869 if (card->ext_csd.cmdq_en) {
1870 pr_info("%s: Command Queue Engine enabled\n",
1871 mmc_hostname(host));
1872 } else {
1873 host->hsq_enabled = true;
1874 pr_info("%s: Host Software Queue enabled\n",
1875 mmc_hostname(host));
1876 }
1877 }
1878 }
1879
1880 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1881 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1882 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1883 mmc_hostname(host));
1884 err = -EINVAL;
1885 goto free_card;
1886 }
1887
1888 if (!oldcard)
1889 host->card = card;
1890
1891 return 0;
1892
1893 free_card:
1894 if (!oldcard)
1895 mmc_remove_card(card);
1896 err:
1897 return err;
1898 }
1899
1900 static int mmc_can_sleep(struct mmc_card *card)
1901 {
1902 return (card && card->ext_csd.rev >= 3);
1903 }
1904
1905 static int mmc_sleep(struct mmc_host *host)
1906 {
1907 struct mmc_command cmd = {};
1908 struct mmc_card *card = host->card;
1909 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1910 int err;
1911
1912 /* Re-tuning can't be done once the card is deselected */
1913 mmc_retune_hold(host);
1914
1915 err = mmc_deselect_cards(host);
1916 if (err)
1917 goto out_release;
1918
1919 cmd.opcode = MMC_SLEEP_AWAKE;
1920 cmd.arg = card->rca << 16;
1921 cmd.arg |= 1 << 15;
1922
1923 /*
1924 * If the max_busy_timeout of the host is specified, validate it against
1925 * the sleep cmd timeout. A failure means we need to prevent the host
1926 * from doing hw busy detection, which is done by converting to a R1
1927 * response instead of a R1B. Note, some hosts requires R1B, which also
1928 * means they are on their own when it comes to deal with the busy
1929 * timeout.
1930 */
1931 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
1932 (timeout_ms > host->max_busy_timeout)) {
1933 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1934 } else {
1935 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1936 cmd.busy_timeout = timeout_ms;
1937 }
1938
1939 err = mmc_wait_for_cmd(host, &cmd, 0);
1940 if (err)
1941 goto out_release;
1942
1943 /*
1944 * If the host does not wait while the card signals busy, then we will
1945 * will have to wait the sleep/awake timeout. Note, we cannot use the
1946 * SEND_STATUS command to poll the status because that command (and most
1947 * others) is invalid while the card sleeps.
1948 */
1949 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1950 mmc_delay(timeout_ms);
1951
1952 out_release:
1953 mmc_retune_release(host);
1954 return err;
1955 }
1956
1957 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1958 {
1959 return card &&
1960 mmc_card_mmc(card) &&
1961 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1962 }
1963
1964 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1965 {
1966 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1967 int err;
1968
1969 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1970 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1971 timeout = card->ext_csd.power_off_longtime;
1972
1973 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1974 EXT_CSD_POWER_OFF_NOTIFICATION,
1975 notify_type, timeout, 0, false, false);
1976 if (err)
1977 pr_err("%s: Power Off Notification timed out, %u\n",
1978 mmc_hostname(card->host), timeout);
1979
1980 /* Disable the power off notification after the switch operation. */
1981 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1982
1983 return err;
1984 }
1985
1986 /*
1987 * Host is being removed. Free up the current card.
1988 */
1989 static void mmc_remove(struct mmc_host *host)
1990 {
1991 mmc_remove_card(host->card);
1992 host->card = NULL;
1993 }
1994
1995 /*
1996 * Card detection - card is alive.
1997 */
1998 static int mmc_alive(struct mmc_host *host)
1999 {
2000 return mmc_send_status(host->card, NULL);
2001 }
2002
2003 /*
2004 * Card detection callback from host.
2005 */
2006 static void mmc_detect(struct mmc_host *host)
2007 {
2008 int err;
2009
2010 mmc_get_card(host->card, NULL);
2011
2012 /*
2013 * Just check if our card has been removed.
2014 */
2015 err = _mmc_detect_card_removed(host);
2016
2017 mmc_put_card(host->card, NULL);
2018
2019 if (err) {
2020 mmc_remove(host);
2021
2022 mmc_claim_host(host);
2023 mmc_detach_bus(host);
2024 mmc_power_off(host);
2025 mmc_release_host(host);
2026 }
2027 }
2028
2029 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
2030 {
2031 int err = 0;
2032 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
2033 EXT_CSD_POWER_OFF_LONG;
2034
2035 mmc_claim_host(host);
2036
2037 if (mmc_card_suspended(host->card))
2038 goto out;
2039
2040 err = mmc_flush_cache(host->card);
2041 if (err)
2042 goto out;
2043
2044 if (mmc_can_poweroff_notify(host->card) &&
2045 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend ||
2046 (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND)))
2047 err = mmc_poweroff_notify(host->card, notify_type);
2048 else if (mmc_can_sleep(host->card))
2049 err = mmc_sleep(host);
2050 else if (!mmc_host_is_spi(host))
2051 err = mmc_deselect_cards(host);
2052
2053 if (!err) {
2054 mmc_power_off(host);
2055 mmc_card_set_suspended(host->card);
2056 }
2057 out:
2058 mmc_release_host(host);
2059 return err;
2060 }
2061
2062 /*
2063 * Suspend callback
2064 */
2065 static int mmc_suspend(struct mmc_host *host)
2066 {
2067 int err;
2068
2069 err = _mmc_suspend(host, true);
2070 if (!err) {
2071 pm_runtime_disable(&host->card->dev);
2072 pm_runtime_set_suspended(&host->card->dev);
2073 }
2074
2075 return err;
2076 }
2077
2078 /*
2079 * This function tries to determine if the same card is still present
2080 * and, if so, restore all state to it.
2081 */
2082 static int _mmc_resume(struct mmc_host *host)
2083 {
2084 int err = 0;
2085
2086 mmc_claim_host(host);
2087
2088 if (!mmc_card_suspended(host->card))
2089 goto out;
2090
2091 mmc_power_up(host, host->card->ocr);
2092 err = mmc_init_card(host, host->card->ocr, host->card);
2093 mmc_card_clr_suspended(host->card);
2094
2095 out:
2096 mmc_release_host(host);
2097 return err;
2098 }
2099
2100 /*
2101 * Shutdown callback
2102 */
2103 static int mmc_shutdown(struct mmc_host *host)
2104 {
2105 int err = 0;
2106
2107 /*
2108 * In a specific case for poweroff notify, we need to resume the card
2109 * before we can shutdown it properly.
2110 */
2111 if (mmc_can_poweroff_notify(host->card) &&
2112 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2113 err = _mmc_resume(host);
2114
2115 if (!err)
2116 err = _mmc_suspend(host, false);
2117
2118 return err;
2119 }
2120
2121 /*
2122 * Callback for resume.
2123 */
2124 static int mmc_resume(struct mmc_host *host)
2125 {
2126 pm_runtime_enable(&host->card->dev);
2127 return 0;
2128 }
2129
2130 /*
2131 * Callback for runtime_suspend.
2132 */
2133 static int mmc_runtime_suspend(struct mmc_host *host)
2134 {
2135 int err;
2136
2137 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2138 return 0;
2139
2140 err = _mmc_suspend(host, true);
2141 if (err)
2142 pr_err("%s: error %d doing aggressive suspend\n",
2143 mmc_hostname(host), err);
2144
2145 return err;
2146 }
2147
2148 /*
2149 * Callback for runtime_resume.
2150 */
2151 static int mmc_runtime_resume(struct mmc_host *host)
2152 {
2153 int err;
2154
2155 err = _mmc_resume(host);
2156 if (err && err != -ENOMEDIUM)
2157 pr_err("%s: error %d doing runtime resume\n",
2158 mmc_hostname(host), err);
2159
2160 return 0;
2161 }
2162
2163 static int mmc_can_reset(struct mmc_card *card)
2164 {
2165 u8 rst_n_function;
2166
2167 rst_n_function = card->ext_csd.rst_n_function;
2168 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2169 return 0;
2170 return 1;
2171 }
2172
2173 static int _mmc_hw_reset(struct mmc_host *host)
2174 {
2175 struct mmc_card *card = host->card;
2176
2177 /*
2178 * In the case of recovery, we can't expect flushing the cache to work
2179 * always, but we have a go and ignore errors.
2180 */
2181 mmc_flush_cache(host->card);
2182
2183 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2184 mmc_can_reset(card)) {
2185 /* If the card accept RST_n signal, send it. */
2186 mmc_set_clock(host, host->f_init);
2187 host->ops->hw_reset(host);
2188 /* Set initial state and call mmc_set_ios */
2189 mmc_set_initial_state(host);
2190 } else {
2191 /* Do a brute force power cycle */
2192 mmc_power_cycle(host, card->ocr);
2193 mmc_pwrseq_reset(host);
2194 }
2195 return mmc_init_card(host, card->ocr, card);
2196 }
2197
2198 static const struct mmc_bus_ops mmc_ops = {
2199 .remove = mmc_remove,
2200 .detect = mmc_detect,
2201 .suspend = mmc_suspend,
2202 .resume = mmc_resume,
2203 .runtime_suspend = mmc_runtime_suspend,
2204 .runtime_resume = mmc_runtime_resume,
2205 .alive = mmc_alive,
2206 .shutdown = mmc_shutdown,
2207 .hw_reset = _mmc_hw_reset,
2208 };
2209
2210 /*
2211 * Starting point for MMC card init.
2212 */
2213 int mmc_attach_mmc(struct mmc_host *host)
2214 {
2215 int err;
2216 u32 ocr, rocr;
2217
2218 WARN_ON(!host->claimed);
2219
2220 /* Set correct bus mode for MMC before attempting attach */
2221 if (!mmc_host_is_spi(host))
2222 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2223
2224 err = mmc_send_op_cond(host, 0, &ocr);
2225 if (err)
2226 return err;
2227
2228 mmc_attach_bus(host, &mmc_ops);
2229 if (host->ocr_avail_mmc)
2230 host->ocr_avail = host->ocr_avail_mmc;
2231
2232 /*
2233 * We need to get OCR a different way for SPI.
2234 */
2235 if (mmc_host_is_spi(host)) {
2236 err = mmc_spi_read_ocr(host, 1, &ocr);
2237 if (err)
2238 goto err;
2239 }
2240
2241 rocr = mmc_select_voltage(host, ocr);
2242
2243 /*
2244 * Can we support the voltage of the card?
2245 */
2246 if (!rocr) {
2247 err = -EINVAL;
2248 goto err;
2249 }
2250
2251 /*
2252 * Detect and init the card.
2253 */
2254 err = mmc_init_card(host, rocr, NULL);
2255 if (err)
2256 goto err;
2257
2258 mmc_release_host(host);
2259 err = mmc_add_card(host->card);
2260 if (err)
2261 goto remove_card;
2262
2263 mmc_claim_host(host);
2264 return 0;
2265
2266 remove_card:
2267 mmc_remove_card(host->card);
2268 mmc_claim_host(host);
2269 host->card = NULL;
2270 err:
2271 mmc_detach_bus(host);
2272
2273 pr_err("%s: error %d whilst initialising MMC card\n",
2274 mmc_hostname(host), err);
2275
2276 return err;
2277 }
Linux with added FPC-III support