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ASoC: acpi: fix machine driver selection based on quirk
[linux/fpc-iii.git] / drivers / mmc / core / mmc.c
blob208a762b87ef2876914d641b38fc61858429a22e
1 /*
2 * linux/drivers/mmc/core/mmc.c
3 *
4 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
5 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
6 * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/err.h>
14 #include <linux/of.h>
15 #include <linux/slab.h>
16 #include <linux/stat.h>
17 #include <linux/pm_runtime.h>
18
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/card.h>
21 #include <linux/mmc/mmc.h>
22
23 #include "core.h"
24 #include "card.h"
25 #include "host.h"
26 #include "bus.h"
27 #include "mmc_ops.h"
28 #include "quirks.h"
29 #include "sd_ops.h"
30 #include "pwrseq.h"
31
32 #define DEFAULT_CMD6_TIMEOUT_MS 500
33
34 static const unsigned int tran_exp[] = {
35 10000, 100000, 1000000, 10000000,
36 0, 0, 0, 0
37 };
38
39 static const unsigned char tran_mant[] = {
40 0, 10, 12, 13, 15, 20, 25, 30,
41 35, 40, 45, 50, 55, 60, 70, 80,
42 };
43
44 static const unsigned int taac_exp[] = {
45 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
46 };
47
48 static const unsigned int taac_mant[] = {
49 0, 10, 12, 13, 15, 20, 25, 30,
50 35, 40, 45, 50, 55, 60, 70, 80,
51 };
52
53 #define UNSTUFF_BITS(resp,start,size) \
54 ({ \
55 const int __size = size; \
56 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
57 const int __off = 3 - ((start) / 32); \
58 const int __shft = (start) & 31; \
59 u32 __res; \
60 \
61 __res = resp[__off] >> __shft; \
62 if (__size + __shft > 32) \
63 __res |= resp[__off-1] << ((32 - __shft) % 32); \
64 __res & __mask; \
65 })
66
67 /*
68 * Given the decoded CSD structure, decode the raw CID to our CID structure.
69 */
70 static int mmc_decode_cid(struct mmc_card *card)
71 {
72 u32 *resp = card->raw_cid;
73
74 /*
75 * The selection of the format here is based upon published
76 * specs from sandisk and from what people have reported.
77 */
78 switch (card->csd.mmca_vsn) {
79 case 0: /* MMC v1.0 - v1.2 */
80 case 1: /* MMC v1.4 */
81 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
82 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
83 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
84 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
85 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
86 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
87 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
88 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
89 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
90 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
91 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
92 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
93 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
94 break;
95
96 case 2: /* MMC v2.0 - v2.2 */
97 case 3: /* MMC v3.1 - v3.3 */
98 case 4: /* MMC v4 */
99 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
100 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
101 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
102 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
103 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
104 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
105 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
106 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
107 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
108 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
109 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
110 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
111 break;
112
113 default:
114 pr_err("%s: card has unknown MMCA version %d\n",
115 mmc_hostname(card->host), card->csd.mmca_vsn);
116 return -EINVAL;
117 }
118
119 return 0;
120 }
121
122 static void mmc_set_erase_size(struct mmc_card *card)
123 {
124 if (card->ext_csd.erase_group_def & 1)
125 card->erase_size = card->ext_csd.hc_erase_size;
126 else
127 card->erase_size = card->csd.erase_size;
128
129 mmc_init_erase(card);
130 }
131
132 /*
133 * Given a 128-bit response, decode to our card CSD structure.
134 */
135 static int mmc_decode_csd(struct mmc_card *card)
136 {
137 struct mmc_csd *csd = &card->csd;
138 unsigned int e, m, a, b;
139 u32 *resp = card->raw_csd;
140
141 /*
142 * We only understand CSD structure v1.1 and v1.2.
143 * v1.2 has extra information in bits 15, 11 and 10.
144 * We also support eMMC v4.4 & v4.41.
145 */
146 csd->structure = UNSTUFF_BITS(resp, 126, 2);
147 if (csd->structure == 0) {
148 pr_err("%s: unrecognised CSD structure version %d\n",
149 mmc_hostname(card->host), csd->structure);
150 return -EINVAL;
151 }
152
153 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
154 m = UNSTUFF_BITS(resp, 115, 4);
155 e = UNSTUFF_BITS(resp, 112, 3);
156 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
157 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
158
159 m = UNSTUFF_BITS(resp, 99, 4);
160 e = UNSTUFF_BITS(resp, 96, 3);
161 csd->max_dtr = tran_exp[e] * tran_mant[m];
162 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
163
164 e = UNSTUFF_BITS(resp, 47, 3);
165 m = UNSTUFF_BITS(resp, 62, 12);
166 csd->capacity = (1 + m) << (e + 2);
167
168 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
169 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
170 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
171 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
172 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
173 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
174 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
175 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
176
177 if (csd->write_blkbits >= 9) {
178 a = UNSTUFF_BITS(resp, 42, 5);
179 b = UNSTUFF_BITS(resp, 37, 5);
180 csd->erase_size = (a + 1) * (b + 1);
181 csd->erase_size <<= csd->write_blkbits - 9;
182 }
183
184 return 0;
185 }
186
187 static void mmc_select_card_type(struct mmc_card *card)
188 {
189 struct mmc_host *host = card->host;
190 u8 card_type = card->ext_csd.raw_card_type;
191 u32 caps = host->caps, caps2 = host->caps2;
192 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
193 unsigned int avail_type = 0;
194
195 if (caps & MMC_CAP_MMC_HIGHSPEED &&
196 card_type & EXT_CSD_CARD_TYPE_HS_26) {
197 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
198 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
199 }
200
201 if (caps & MMC_CAP_MMC_HIGHSPEED &&
202 card_type & EXT_CSD_CARD_TYPE_HS_52) {
203 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
204 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
205 }
206
207 if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
208 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
209 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
210 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
211 }
212
213 if (caps & MMC_CAP_1_2V_DDR &&
214 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
215 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
216 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
217 }
218
219 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
220 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
221 hs200_max_dtr = MMC_HS200_MAX_DTR;
222 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
223 }
224
225 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
226 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
227 hs200_max_dtr = MMC_HS200_MAX_DTR;
228 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
229 }
230
231 if (caps2 & MMC_CAP2_HS400_1_8V &&
232 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
233 hs200_max_dtr = MMC_HS200_MAX_DTR;
234 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
235 }
236
237 if (caps2 & MMC_CAP2_HS400_1_2V &&
238 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
239 hs200_max_dtr = MMC_HS200_MAX_DTR;
240 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
241 }
242
243 if ((caps2 & MMC_CAP2_HS400_ES) &&
244 card->ext_csd.strobe_support &&
245 (avail_type & EXT_CSD_CARD_TYPE_HS400))
246 avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
247
248 card->ext_csd.hs_max_dtr = hs_max_dtr;
249 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
250 card->mmc_avail_type = avail_type;
251 }
252
253 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
254 {
255 u8 hc_erase_grp_sz, hc_wp_grp_sz;
256
257 /*
258 * Disable these attributes by default
259 */
260 card->ext_csd.enhanced_area_offset = -EINVAL;
261 card->ext_csd.enhanced_area_size = -EINVAL;
262
263 /*
264 * Enhanced area feature support -- check whether the eMMC
265 * card has the Enhanced area enabled. If so, export enhanced
266 * area offset and size to user by adding sysfs interface.
267 */
268 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
269 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
270 if (card->ext_csd.partition_setting_completed) {
271 hc_erase_grp_sz =
272 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
273 hc_wp_grp_sz =
274 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
275
276 /*
277 * calculate the enhanced data area offset, in bytes
278 */
279 card->ext_csd.enhanced_area_offset =
280 (((unsigned long long)ext_csd[139]) << 24) +
281 (((unsigned long long)ext_csd[138]) << 16) +
282 (((unsigned long long)ext_csd[137]) << 8) +
283 (((unsigned long long)ext_csd[136]));
284 if (mmc_card_blockaddr(card))
285 card->ext_csd.enhanced_area_offset <<= 9;
286 /*
287 * calculate the enhanced data area size, in kilobytes
288 */
289 card->ext_csd.enhanced_area_size =
290 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
291 ext_csd[140];
292 card->ext_csd.enhanced_area_size *=
293 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
294 card->ext_csd.enhanced_area_size <<= 9;
295 } else {
296 pr_warn("%s: defines enhanced area without partition setting complete\n",
297 mmc_hostname(card->host));
298 }
299 }
300 }
301
302 static void mmc_part_add(struct mmc_card *card, unsigned int size,
303 unsigned int part_cfg, char *name, int idx, bool ro,
304 int area_type)
305 {
306 card->part[card->nr_parts].size = size;
307 card->part[card->nr_parts].part_cfg = part_cfg;
308 sprintf(card->part[card->nr_parts].name, name, idx);
309 card->part[card->nr_parts].force_ro = ro;
310 card->part[card->nr_parts].area_type = area_type;
311 card->nr_parts++;
312 }
313
314 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
315 {
316 int idx;
317 u8 hc_erase_grp_sz, hc_wp_grp_sz;
318 unsigned int part_size;
319
320 /*
321 * General purpose partition feature support --
322 * If ext_csd has the size of general purpose partitions,
323 * set size, part_cfg, partition name in mmc_part.
324 */
325 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
326 EXT_CSD_PART_SUPPORT_PART_EN) {
327 hc_erase_grp_sz =
328 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
329 hc_wp_grp_sz =
330 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
331
332 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
333 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
334 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
335 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
336 continue;
337 if (card->ext_csd.partition_setting_completed == 0) {
338 pr_warn("%s: has partition size defined without partition complete\n",
339 mmc_hostname(card->host));
340 break;
341 }
342 part_size =
343 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
344 << 16) +
345 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
346 << 8) +
347 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
348 part_size *= (size_t)(hc_erase_grp_sz *
349 hc_wp_grp_sz);
350 mmc_part_add(card, part_size << 19,
351 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
352 "gp%d", idx, false,
353 MMC_BLK_DATA_AREA_GP);
354 }
355 }
356 }
357
358 /* Minimum partition switch timeout in milliseconds */
359 #define MMC_MIN_PART_SWITCH_TIME 300
360
361 /*
362 * Decode extended CSD.
363 */
364 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
365 {
366 int err = 0, idx;
367 unsigned int part_size;
368 struct device_node *np;
369 bool broken_hpi = false;
370
371 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
372 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
373 if (card->csd.structure == 3) {
374 if (card->ext_csd.raw_ext_csd_structure > 2) {
375 pr_err("%s: unrecognised EXT_CSD structure "
376 "version %d\n", mmc_hostname(card->host),
377 card->ext_csd.raw_ext_csd_structure);
378 err = -EINVAL;
379 goto out;
380 }
381 }
382
383 np = mmc_of_find_child_device(card->host, 0);
384 if (np && of_device_is_compatible(np, "mmc-card"))
385 broken_hpi = of_property_read_bool(np, "broken-hpi");
386 of_node_put(np);
387
388 /*
389 * The EXT_CSD format is meant to be forward compatible. As long
390 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
391 * are authorized, see JEDEC JESD84-B50 section B.8.
392 */
393 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
394
395 /* fixup device after ext_csd revision field is updated */
396 mmc_fixup_device(card, mmc_ext_csd_fixups);
397
398 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
399 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
400 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
401 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
402 if (card->ext_csd.rev >= 2) {
403 card->ext_csd.sectors =
404 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
405 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
406 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
407 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
408
409 /* Cards with density > 2GiB are sector addressed */
410 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
411 mmc_card_set_blockaddr(card);
412 }
413
414 card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
415 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
416 mmc_select_card_type(card);
417
418 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
419 card->ext_csd.raw_erase_timeout_mult =
420 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
421 card->ext_csd.raw_hc_erase_grp_size =
422 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
423 if (card->ext_csd.rev >= 3) {
424 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
425 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
426
427 /* EXT_CSD value is in units of 10ms, but we store in ms */
428 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
429 /* Some eMMC set the value too low so set a minimum */
430 if (card->ext_csd.part_time &&
431 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
432 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
433
434 /* Sleep / awake timeout in 100ns units */
435 if (sa_shift > 0 && sa_shift <= 0x17)
436 card->ext_csd.sa_timeout =
437 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
438 card->ext_csd.erase_group_def =
439 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
440 card->ext_csd.hc_erase_timeout = 300 *
441 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
442 card->ext_csd.hc_erase_size =
443 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
444
445 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
446
447 /*
448 * There are two boot regions of equal size, defined in
449 * multiples of 128K.
450 */
451 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
452 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
453 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
454 mmc_part_add(card, part_size,
455 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
456 "boot%d", idx, true,
457 MMC_BLK_DATA_AREA_BOOT);
458 }
459 }
460 }
461
462 card->ext_csd.raw_hc_erase_gap_size =
463 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
464 card->ext_csd.raw_sec_trim_mult =
465 ext_csd[EXT_CSD_SEC_TRIM_MULT];
466 card->ext_csd.raw_sec_erase_mult =
467 ext_csd[EXT_CSD_SEC_ERASE_MULT];
468 card->ext_csd.raw_sec_feature_support =
469 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
470 card->ext_csd.raw_trim_mult =
471 ext_csd[EXT_CSD_TRIM_MULT];
472 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
473 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
474 if (card->ext_csd.rev >= 4) {
475 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
476 EXT_CSD_PART_SETTING_COMPLETED)
477 card->ext_csd.partition_setting_completed = 1;
478 else
479 card->ext_csd.partition_setting_completed = 0;
480
481 mmc_manage_enhanced_area(card, ext_csd);
482
483 mmc_manage_gp_partitions(card, ext_csd);
484
485 card->ext_csd.sec_trim_mult =
486 ext_csd[EXT_CSD_SEC_TRIM_MULT];
487 card->ext_csd.sec_erase_mult =
488 ext_csd[EXT_CSD_SEC_ERASE_MULT];
489 card->ext_csd.sec_feature_support =
490 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
491 card->ext_csd.trim_timeout = 300 *
492 ext_csd[EXT_CSD_TRIM_MULT];
493
494 /*
495 * Note that the call to mmc_part_add above defaults to read
496 * only. If this default assumption is changed, the call must
497 * take into account the value of boot_locked below.
498 */
499 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
500 card->ext_csd.boot_ro_lockable = true;
501
502 /* Save power class values */
503 card->ext_csd.raw_pwr_cl_52_195 =
504 ext_csd[EXT_CSD_PWR_CL_52_195];
505 card->ext_csd.raw_pwr_cl_26_195 =
506 ext_csd[EXT_CSD_PWR_CL_26_195];
507 card->ext_csd.raw_pwr_cl_52_360 =
508 ext_csd[EXT_CSD_PWR_CL_52_360];
509 card->ext_csd.raw_pwr_cl_26_360 =
510 ext_csd[EXT_CSD_PWR_CL_26_360];
511 card->ext_csd.raw_pwr_cl_200_195 =
512 ext_csd[EXT_CSD_PWR_CL_200_195];
513 card->ext_csd.raw_pwr_cl_200_360 =
514 ext_csd[EXT_CSD_PWR_CL_200_360];
515 card->ext_csd.raw_pwr_cl_ddr_52_195 =
516 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
517 card->ext_csd.raw_pwr_cl_ddr_52_360 =
518 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
519 card->ext_csd.raw_pwr_cl_ddr_200_360 =
520 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
521 }
522
523 if (card->ext_csd.rev >= 5) {
524 /* Adjust production date as per JEDEC JESD84-B451 */
525 if (card->cid.year < 2010)
526 card->cid.year += 16;
527
528 /* check whether the eMMC card supports BKOPS */
529 if (!mmc_card_broken_hpi(card) &&
530 ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
531 card->ext_csd.bkops = 1;
532 card->ext_csd.man_bkops_en =
533 (ext_csd[EXT_CSD_BKOPS_EN] &
534 EXT_CSD_MANUAL_BKOPS_MASK);
535 card->ext_csd.raw_bkops_status =
536 ext_csd[EXT_CSD_BKOPS_STATUS];
537 if (card->ext_csd.man_bkops_en)
538 pr_debug("%s: MAN_BKOPS_EN bit is set\n",
539 mmc_hostname(card->host));
540 card->ext_csd.auto_bkops_en =
541 (ext_csd[EXT_CSD_BKOPS_EN] &
542 EXT_CSD_AUTO_BKOPS_MASK);
543 if (card->ext_csd.auto_bkops_en)
544 pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
545 mmc_hostname(card->host));
546 }
547
548 /* check whether the eMMC card supports HPI */
549 if (!mmc_card_broken_hpi(card) &&
550 !broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
551 card->ext_csd.hpi = 1;
552 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
553 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
554 else
555 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
556 /*
557 * Indicate the maximum timeout to close
558 * a command interrupted by HPI
559 */
560 card->ext_csd.out_of_int_time =
561 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
562 }
563
564 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
565 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
566
567 /*
568 * RPMB regions are defined in multiples of 128K.
569 */
570 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
571 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
572 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
573 EXT_CSD_PART_CONFIG_ACC_RPMB,
574 "rpmb", 0, false,
575 MMC_BLK_DATA_AREA_RPMB);
576 }
577 }
578
579 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
580 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
581 card->erased_byte = 0xFF;
582 else
583 card->erased_byte = 0x0;
584
585 /* eMMC v4.5 or later */
586 card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
587 if (card->ext_csd.rev >= 6) {
588 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
589
590 card->ext_csd.generic_cmd6_time = 10 *
591 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
592 card->ext_csd.power_off_longtime = 10 *
593 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
594
595 card->ext_csd.cache_size =
596 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
597 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
598 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
599 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
600
601 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
602 card->ext_csd.data_sector_size = 4096;
603 else
604 card->ext_csd.data_sector_size = 512;
605
606 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
607 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
608 card->ext_csd.data_tag_unit_size =
609 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
610 (card->ext_csd.data_sector_size);
611 } else {
612 card->ext_csd.data_tag_unit_size = 0;
613 }
614
615 card->ext_csd.max_packed_writes =
616 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
617 card->ext_csd.max_packed_reads =
618 ext_csd[EXT_CSD_MAX_PACKED_READS];
619 } else {
620 card->ext_csd.data_sector_size = 512;
621 }
622
623 /* eMMC v5 or later */
624 if (card->ext_csd.rev >= 7) {
625 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
626 MMC_FIRMWARE_LEN);
627 card->ext_csd.ffu_capable =
628 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
629 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
630
631 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
632 card->ext_csd.device_life_time_est_typ_a =
633 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
634 card->ext_csd.device_life_time_est_typ_b =
635 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
636 }
637
638 /* eMMC v5.1 or later */
639 if (card->ext_csd.rev >= 8) {
640 card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
641 EXT_CSD_CMDQ_SUPPORTED;
642 card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
643 EXT_CSD_CMDQ_DEPTH_MASK) + 1;
644 /* Exclude inefficiently small queue depths */
645 if (card->ext_csd.cmdq_depth <= 2) {
646 card->ext_csd.cmdq_support = false;
647 card->ext_csd.cmdq_depth = 0;
648 }
649 if (card->ext_csd.cmdq_support) {
650 pr_debug("%s: Command Queue supported depth %u\n",
651 mmc_hostname(card->host),
652 card->ext_csd.cmdq_depth);
653 }
654 }
655 out:
656 return err;
657 }
658
659 static int mmc_read_ext_csd(struct mmc_card *card)
660 {
661 u8 *ext_csd;
662 int err;
663
664 if (!mmc_can_ext_csd(card))
665 return 0;
666
667 err = mmc_get_ext_csd(card, &ext_csd);
668 if (err) {
669 /* If the host or the card can't do the switch,
670 * fail more gracefully. */
671 if ((err != -EINVAL)
672 && (err != -ENOSYS)
673 && (err != -EFAULT))
674 return err;
675
676 /*
677 * High capacity cards should have this "magic" size
678 * stored in their CSD.
679 */
680 if (card->csd.capacity == (4096 * 512)) {
681 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
682 mmc_hostname(card->host));
683 } else {
684 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
685 mmc_hostname(card->host));
686 err = 0;
687 }
688
689 return err;
690 }
691
692 err = mmc_decode_ext_csd(card, ext_csd);
693 kfree(ext_csd);
694 return err;
695 }
696
697 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
698 {
699 u8 *bw_ext_csd;
700 int err;
701
702 if (bus_width == MMC_BUS_WIDTH_1)
703 return 0;
704
705 err = mmc_get_ext_csd(card, &bw_ext_csd);
706 if (err)
707 return err;
708
709 /* only compare read only fields */
710 err = !((card->ext_csd.raw_partition_support ==
711 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
712 (card->ext_csd.raw_erased_mem_count ==
713 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
714 (card->ext_csd.rev ==
715 bw_ext_csd[EXT_CSD_REV]) &&
716 (card->ext_csd.raw_ext_csd_structure ==
717 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
718 (card->ext_csd.raw_card_type ==
719 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
720 (card->ext_csd.raw_s_a_timeout ==
721 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
722 (card->ext_csd.raw_hc_erase_gap_size ==
723 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
724 (card->ext_csd.raw_erase_timeout_mult ==
725 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
726 (card->ext_csd.raw_hc_erase_grp_size ==
727 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
728 (card->ext_csd.raw_sec_trim_mult ==
729 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
730 (card->ext_csd.raw_sec_erase_mult ==
731 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
732 (card->ext_csd.raw_sec_feature_support ==
733 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
734 (card->ext_csd.raw_trim_mult ==
735 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
736 (card->ext_csd.raw_sectors[0] ==
737 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
738 (card->ext_csd.raw_sectors[1] ==
739 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
740 (card->ext_csd.raw_sectors[2] ==
741 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
742 (card->ext_csd.raw_sectors[3] ==
743 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
744 (card->ext_csd.raw_pwr_cl_52_195 ==
745 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
746 (card->ext_csd.raw_pwr_cl_26_195 ==
747 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
748 (card->ext_csd.raw_pwr_cl_52_360 ==
749 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
750 (card->ext_csd.raw_pwr_cl_26_360 ==
751 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
752 (card->ext_csd.raw_pwr_cl_200_195 ==
753 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
754 (card->ext_csd.raw_pwr_cl_200_360 ==
755 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
756 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
757 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
758 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
759 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
760 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
761 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
762
763 if (err)
764 err = -EINVAL;
765
766 kfree(bw_ext_csd);
767 return err;
768 }
769
770 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
771 card->raw_cid[2], card->raw_cid[3]);
772 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
773 card->raw_csd[2], card->raw_csd[3]);
774 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
775 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
776 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
777 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
778 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
779 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
780 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
781 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
782 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
783 MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
784 MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
785 MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
786 card->ext_csd.device_life_time_est_typ_a,
787 card->ext_csd.device_life_time_est_typ_b);
788 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
789 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
790 card->ext_csd.enhanced_area_offset);
791 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
792 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
793 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
794 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
795 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
796
797 static ssize_t mmc_fwrev_show(struct device *dev,
798 struct device_attribute *attr,
799 char *buf)
800 {
801 struct mmc_card *card = mmc_dev_to_card(dev);
802
803 if (card->ext_csd.rev < 7) {
804 return sprintf(buf, "0x%x\n", card->cid.fwrev);
805 } else {
806 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
807 card->ext_csd.fwrev);
808 }
809 }
810
811 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
812
813 static ssize_t mmc_dsr_show(struct device *dev,
814 struct device_attribute *attr,
815 char *buf)
816 {
817 struct mmc_card *card = mmc_dev_to_card(dev);
818 struct mmc_host *host = card->host;
819
820 if (card->csd.dsr_imp && host->dsr_req)
821 return sprintf(buf, "0x%x\n", host->dsr);
822 else
823 /* return default DSR value */
824 return sprintf(buf, "0x%x\n", 0x404);
825 }
826
827 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
828
829 static struct attribute *mmc_std_attrs[] = {
830 &dev_attr_cid.attr,
831 &dev_attr_csd.attr,
832 &dev_attr_date.attr,
833 &dev_attr_erase_size.attr,
834 &dev_attr_preferred_erase_size.attr,
835 &dev_attr_fwrev.attr,
836 &dev_attr_ffu_capable.attr,
837 &dev_attr_hwrev.attr,
838 &dev_attr_manfid.attr,
839 &dev_attr_name.attr,
840 &dev_attr_oemid.attr,
841 &dev_attr_prv.attr,
842 &dev_attr_rev.attr,
843 &dev_attr_pre_eol_info.attr,
844 &dev_attr_life_time.attr,
845 &dev_attr_serial.attr,
846 &dev_attr_enhanced_area_offset.attr,
847 &dev_attr_enhanced_area_size.attr,
848 &dev_attr_raw_rpmb_size_mult.attr,
849 &dev_attr_rel_sectors.attr,
850 &dev_attr_ocr.attr,
851 &dev_attr_dsr.attr,
852 &dev_attr_cmdq_en.attr,
853 NULL,
854 };
855 ATTRIBUTE_GROUPS(mmc_std);
856
857 static struct device_type mmc_type = {
858 .groups = mmc_std_groups,
859 };
860
861 /*
862 * Select the PowerClass for the current bus width
863 * If power class is defined for 4/8 bit bus in the
864 * extended CSD register, select it by executing the
865 * mmc_switch command.
866 */
867 static int __mmc_select_powerclass(struct mmc_card *card,
868 unsigned int bus_width)
869 {
870 struct mmc_host *host = card->host;
871 struct mmc_ext_csd *ext_csd = &card->ext_csd;
872 unsigned int pwrclass_val = 0;
873 int err = 0;
874
875 switch (1 << host->ios.vdd) {
876 case MMC_VDD_165_195:
877 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
878 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
879 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
880 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
881 ext_csd->raw_pwr_cl_52_195 :
882 ext_csd->raw_pwr_cl_ddr_52_195;
883 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
884 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
885 break;
886 case MMC_VDD_27_28:
887 case MMC_VDD_28_29:
888 case MMC_VDD_29_30:
889 case MMC_VDD_30_31:
890 case MMC_VDD_31_32:
891 case MMC_VDD_32_33:
892 case MMC_VDD_33_34:
893 case MMC_VDD_34_35:
894 case MMC_VDD_35_36:
895 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
896 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
897 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
898 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
899 ext_csd->raw_pwr_cl_52_360 :
900 ext_csd->raw_pwr_cl_ddr_52_360;
901 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
902 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
903 ext_csd->raw_pwr_cl_ddr_200_360 :
904 ext_csd->raw_pwr_cl_200_360;
905 break;
906 default:
907 pr_warn("%s: Voltage range not supported for power class\n",
908 mmc_hostname(host));
909 return -EINVAL;
910 }
911
912 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
913 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
914 EXT_CSD_PWR_CL_8BIT_SHIFT;
915 else
916 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
917 EXT_CSD_PWR_CL_4BIT_SHIFT;
918
919 /* If the power class is different from the default value */
920 if (pwrclass_val > 0) {
921 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
922 EXT_CSD_POWER_CLASS,
923 pwrclass_val,
924 card->ext_csd.generic_cmd6_time);
925 }
926
927 return err;
928 }
929
930 static int mmc_select_powerclass(struct mmc_card *card)
931 {
932 struct mmc_host *host = card->host;
933 u32 bus_width, ext_csd_bits;
934 int err, ddr;
935
936 /* Power class selection is supported for versions >= 4.0 */
937 if (!mmc_can_ext_csd(card))
938 return 0;
939
940 bus_width = host->ios.bus_width;
941 /* Power class values are defined only for 4/8 bit bus */
942 if (bus_width == MMC_BUS_WIDTH_1)
943 return 0;
944
945 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
946 if (ddr)
947 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
948 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
949 else
950 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
951 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
952
953 err = __mmc_select_powerclass(card, ext_csd_bits);
954 if (err)
955 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
956 mmc_hostname(host), 1 << bus_width, ddr);
957
958 return err;
959 }
960
961 /*
962 * Set the bus speed for the selected speed mode.
963 */
964 static void mmc_set_bus_speed(struct mmc_card *card)
965 {
966 unsigned int max_dtr = (unsigned int)-1;
967
968 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
969 max_dtr > card->ext_csd.hs200_max_dtr)
970 max_dtr = card->ext_csd.hs200_max_dtr;
971 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
972 max_dtr = card->ext_csd.hs_max_dtr;
973 else if (max_dtr > card->csd.max_dtr)
974 max_dtr = card->csd.max_dtr;
975
976 mmc_set_clock(card->host, max_dtr);
977 }
978
979 /*
980 * Select the bus width amoung 4-bit and 8-bit(SDR).
981 * If the bus width is changed successfully, return the selected width value.
982 * Zero is returned instead of error value if the wide width is not supported.
983 */
984 static int mmc_select_bus_width(struct mmc_card *card)
985 {
986 static unsigned ext_csd_bits[] = {
987 EXT_CSD_BUS_WIDTH_8,
988 EXT_CSD_BUS_WIDTH_4,
989 };
990 static unsigned bus_widths[] = {
991 MMC_BUS_WIDTH_8,
992 MMC_BUS_WIDTH_4,
993 };
994 struct mmc_host *host = card->host;
995 unsigned idx, bus_width = 0;
996 int err = 0;
997
998 if (!mmc_can_ext_csd(card) ||
999 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
1000 return 0;
1001
1002 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
1003
1004 /*
1005 * Unlike SD, MMC cards dont have a configuration register to notify
1006 * supported bus width. So bus test command should be run to identify
1007 * the supported bus width or compare the ext csd values of current
1008 * bus width and ext csd values of 1 bit mode read earlier.
1009 */
1010 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1011 /*
1012 * Host is capable of 8bit transfer, then switch
1013 * the device to work in 8bit transfer mode. If the
1014 * mmc switch command returns error then switch to
1015 * 4bit transfer mode. On success set the corresponding
1016 * bus width on the host.
1017 */
1018 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1019 EXT_CSD_BUS_WIDTH,
1020 ext_csd_bits[idx],
1021 card->ext_csd.generic_cmd6_time);
1022 if (err)
1023 continue;
1024
1025 bus_width = bus_widths[idx];
1026 mmc_set_bus_width(host, bus_width);
1027
1028 /*
1029 * If controller can't handle bus width test,
1030 * compare ext_csd previously read in 1 bit mode
1031 * against ext_csd at new bus width
1032 */
1033 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1034 err = mmc_compare_ext_csds(card, bus_width);
1035 else
1036 err = mmc_bus_test(card, bus_width);
1037
1038 if (!err) {
1039 err = bus_width;
1040 break;
1041 } else {
1042 pr_warn("%s: switch to bus width %d failed\n",
1043 mmc_hostname(host), 1 << bus_width);
1044 }
1045 }
1046
1047 return err;
1048 }
1049
1050 /*
1051 * Switch to the high-speed mode
1052 */
1053 static int mmc_select_hs(struct mmc_card *card)
1054 {
1055 int err;
1056
1057 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1058 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1059 card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
1060 true, true, true);
1061 if (err)
1062 pr_warn("%s: switch to high-speed failed, err:%d\n",
1063 mmc_hostname(card->host), err);
1064
1065 return err;
1066 }
1067
1068 /*
1069 * Activate wide bus and DDR if supported.
1070 */
1071 static int mmc_select_hs_ddr(struct mmc_card *card)
1072 {
1073 struct mmc_host *host = card->host;
1074 u32 bus_width, ext_csd_bits;
1075 int err = 0;
1076
1077 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1078 return 0;
1079
1080 bus_width = host->ios.bus_width;
1081 if (bus_width == MMC_BUS_WIDTH_1)
1082 return 0;
1083
1084 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1085 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1086
1087 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1088 EXT_CSD_BUS_WIDTH,
1089 ext_csd_bits,
1090 card->ext_csd.generic_cmd6_time,
1091 MMC_TIMING_MMC_DDR52,
1092 true, true, true);
1093 if (err) {
1094 pr_err("%s: switch to bus width %d ddr failed\n",
1095 mmc_hostname(host), 1 << bus_width);
1096 return err;
1097 }
1098
1099 /*
1100 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1101 * signaling.
1102 *
1103 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1104 *
1105 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1106 * in the JEDEC spec for DDR.
1107 *
1108 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1109 * host controller can support this, like some of the SDHCI
1110 * controller which connect to an eMMC device. Some of these
1111 * host controller still needs to use 1.8v vccq for supporting
1112 * DDR mode.
1113 *
1114 * So the sequence will be:
1115 * if (host and device can both support 1.2v IO)
1116 * use 1.2v IO;
1117 * else if (host and device can both support 1.8v IO)
1118 * use 1.8v IO;
1119 * so if host and device can only support 3.3v IO, this is the
1120 * last choice.
1121 *
1122 * WARNING: eMMC rules are NOT the same as SD DDR
1123 */
1124 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
1125 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1126 if (!err)
1127 return 0;
1128 }
1129
1130 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
1131 host->caps & MMC_CAP_1_8V_DDR)
1132 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1133
1134 /* make sure vccq is 3.3v after switching disaster */
1135 if (err)
1136 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1137
1138 return err;
1139 }
1140
1141 static int mmc_select_hs400(struct mmc_card *card)
1142 {
1143 struct mmc_host *host = card->host;
1144 unsigned int max_dtr;
1145 int err = 0;
1146 u8 val;
1147
1148 /*
1149 * HS400 mode requires 8-bit bus width
1150 */
1151 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1152 host->ios.bus_width == MMC_BUS_WIDTH_8))
1153 return 0;
1154
1155 /* Switch card to HS mode */
1156 val = EXT_CSD_TIMING_HS;
1157 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1158 EXT_CSD_HS_TIMING, val,
1159 card->ext_csd.generic_cmd6_time, 0,
1160 true, false, true);
1161 if (err) {
1162 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1163 mmc_hostname(host), err);
1164 return err;
1165 }
1166
1167 /* Set host controller to HS timing */
1168 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1169
1170 /* Reduce frequency to HS frequency */
1171 max_dtr = card->ext_csd.hs_max_dtr;
1172 mmc_set_clock(host, max_dtr);
1173
1174 err = mmc_switch_status(card);
1175 if (err)
1176 goto out_err;
1177
1178 /* Switch card to DDR */
1179 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1180 EXT_CSD_BUS_WIDTH,
1181 EXT_CSD_DDR_BUS_WIDTH_8,
1182 card->ext_csd.generic_cmd6_time);
1183 if (err) {
1184 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1185 mmc_hostname(host), err);
1186 return err;
1187 }
1188
1189 /* Switch card to HS400 */
1190 val = EXT_CSD_TIMING_HS400 |
1191 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1192 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1193 EXT_CSD_HS_TIMING, val,
1194 card->ext_csd.generic_cmd6_time, 0,
1195 true, false, true);
1196 if (err) {
1197 pr_err("%s: switch to hs400 failed, err:%d\n",
1198 mmc_hostname(host), err);
1199 return err;
1200 }
1201
1202 /* Set host controller to HS400 timing and frequency */
1203 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1204 mmc_set_bus_speed(card);
1205
1206 err = mmc_switch_status(card);
1207 if (err)
1208 goto out_err;
1209
1210 return 0;
1211
1212 out_err:
1213 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1214 __func__, err);
1215 return err;
1216 }
1217
1218 int mmc_hs200_to_hs400(struct mmc_card *card)
1219 {
1220 return mmc_select_hs400(card);
1221 }
1222
1223 int mmc_hs400_to_hs200(struct mmc_card *card)
1224 {
1225 struct mmc_host *host = card->host;
1226 unsigned int max_dtr;
1227 int err;
1228 u8 val;
1229
1230 /* Reduce frequency to HS */
1231 max_dtr = card->ext_csd.hs_max_dtr;
1232 mmc_set_clock(host, max_dtr);
1233
1234 /* Switch HS400 to HS DDR */
1235 val = EXT_CSD_TIMING_HS;
1236 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1237 val, card->ext_csd.generic_cmd6_time, 0,
1238 true, false, true);
1239 if (err)
1240 goto out_err;
1241
1242 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1243
1244 err = mmc_switch_status(card);
1245 if (err)
1246 goto out_err;
1247
1248 /* Switch HS DDR to HS */
1249 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1250 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1251 0, true, false, true);
1252 if (err)
1253 goto out_err;
1254
1255 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1256
1257 err = mmc_switch_status(card);
1258 if (err)
1259 goto out_err;
1260
1261 /* Switch HS to HS200 */
1262 val = EXT_CSD_TIMING_HS200 |
1263 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1264 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1265 val, card->ext_csd.generic_cmd6_time, 0,
1266 true, false, true);
1267 if (err)
1268 goto out_err;
1269
1270 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1271
1272 /*
1273 * For HS200, CRC errors are not a reliable way to know the switch
1274 * failed. If there really is a problem, we would expect tuning will
1275 * fail and the result ends up the same.
1276 */
1277 err = __mmc_switch_status(card, false);
1278 if (err)
1279 goto out_err;
1280
1281 mmc_set_bus_speed(card);
1282
1283 return 0;
1284
1285 out_err:
1286 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1287 __func__, err);
1288 return err;
1289 }
1290
1291 static void mmc_select_driver_type(struct mmc_card *card)
1292 {
1293 int card_drv_type, drive_strength, drv_type = 0;
1294 int fixed_drv_type = card->host->fixed_drv_type;
1295
1296 card_drv_type = card->ext_csd.raw_driver_strength |
1297 mmc_driver_type_mask(0);
1298
1299 if (fixed_drv_type >= 0)
1300 drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
1301 ? fixed_drv_type : 0;
1302 else
1303 drive_strength = mmc_select_drive_strength(card,
1304 card->ext_csd.hs200_max_dtr,
1305 card_drv_type, &drv_type);
1306
1307 card->drive_strength = drive_strength;
1308
1309 if (drv_type)
1310 mmc_set_driver_type(card->host, drv_type);
1311 }
1312
1313 static int mmc_select_hs400es(struct mmc_card *card)
1314 {
1315 struct mmc_host *host = card->host;
1316 int err = -EINVAL;
1317 u8 val;
1318
1319 if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
1320 err = -ENOTSUPP;
1321 goto out_err;
1322 }
1323
1324 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
1325 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1326
1327 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
1328 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1329
1330 /* If fails try again during next card power cycle */
1331 if (err)
1332 goto out_err;
1333
1334 err = mmc_select_bus_width(card);
1335 if (err < 0)
1336 goto out_err;
1337
1338 /* Switch card to HS mode */
1339 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1340 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
1341 card->ext_csd.generic_cmd6_time, 0,
1342 true, false, true);
1343 if (err) {
1344 pr_err("%s: switch to hs for hs400es failed, err:%d\n",
1345 mmc_hostname(host), err);
1346 goto out_err;
1347 }
1348
1349 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1350 err = mmc_switch_status(card);
1351 if (err)
1352 goto out_err;
1353
1354 mmc_set_clock(host, card->ext_csd.hs_max_dtr);
1355
1356 /* Switch card to DDR with strobe bit */
1357 val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
1358 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1359 EXT_CSD_BUS_WIDTH,
1360 val,
1361 card->ext_csd.generic_cmd6_time);
1362 if (err) {
1363 pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
1364 mmc_hostname(host), err);
1365 goto out_err;
1366 }
1367
1368 mmc_select_driver_type(card);
1369
1370 /* Switch card to HS400 */
1371 val = EXT_CSD_TIMING_HS400 |
1372 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1373 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1374 EXT_CSD_HS_TIMING, val,
1375 card->ext_csd.generic_cmd6_time, 0,
1376 true, false, true);
1377 if (err) {
1378 pr_err("%s: switch to hs400es failed, err:%d\n",
1379 mmc_hostname(host), err);
1380 goto out_err;
1381 }
1382
1383 /* Set host controller to HS400 timing and frequency */
1384 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1385
1386 /* Controller enable enhanced strobe function */
1387 host->ios.enhanced_strobe = true;
1388 if (host->ops->hs400_enhanced_strobe)
1389 host->ops->hs400_enhanced_strobe(host, &host->ios);
1390
1391 err = mmc_switch_status(card);
1392 if (err)
1393 goto out_err;
1394
1395 return 0;
1396
1397 out_err:
1398 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1399 __func__, err);
1400 return err;
1401 }
1402
1403 /*
1404 * For device supporting HS200 mode, the following sequence
1405 * should be done before executing the tuning process.
1406 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1407 * 2. switch to HS200 mode
1408 * 3. set the clock to > 52Mhz and <=200MHz
1409 */
1410 static int mmc_select_hs200(struct mmc_card *card)
1411 {
1412 struct mmc_host *host = card->host;
1413 unsigned int old_timing, old_signal_voltage;
1414 int err = -EINVAL;
1415 u8 val;
1416
1417 old_signal_voltage = host->ios.signal_voltage;
1418 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1419 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1420
1421 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1422 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1423
1424 /* If fails try again during next card power cycle */
1425 if (err)
1426 return err;
1427
1428 mmc_select_driver_type(card);
1429
1430 /*
1431 * Set the bus width(4 or 8) with host's support and
1432 * switch to HS200 mode if bus width is set successfully.
1433 */
1434 err = mmc_select_bus_width(card);
1435 if (err > 0) {
1436 val = EXT_CSD_TIMING_HS200 |
1437 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1438 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1439 EXT_CSD_HS_TIMING, val,
1440 card->ext_csd.generic_cmd6_time, 0,
1441 true, false, true);
1442 if (err)
1443 goto err;
1444 old_timing = host->ios.timing;
1445 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1446
1447 /*
1448 * For HS200, CRC errors are not a reliable way to know the
1449 * switch failed. If there really is a problem, we would expect
1450 * tuning will fail and the result ends up the same.
1451 */
1452 err = __mmc_switch_status(card, false);
1453
1454 /*
1455 * mmc_select_timing() assumes timing has not changed if
1456 * it is a switch error.
1457 */
1458 if (err == -EBADMSG)
1459 mmc_set_timing(host, old_timing);
1460 }
1461 err:
1462 if (err) {
1463 /* fall back to the old signal voltage, if fails report error */
1464 if (mmc_set_signal_voltage(host, old_signal_voltage))
1465 err = -EIO;
1466
1467 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1468 __func__, err);
1469 }
1470 return err;
1471 }
1472
1473 /*
1474 * Activate High Speed, HS200 or HS400ES mode if supported.
1475 */
1476 static int mmc_select_timing(struct mmc_card *card)
1477 {
1478 int err = 0;
1479
1480 if (!mmc_can_ext_csd(card))
1481 goto bus_speed;
1482
1483 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
1484 err = mmc_select_hs400es(card);
1485 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1486 err = mmc_select_hs200(card);
1487 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1488 err = mmc_select_hs(card);
1489
1490 if (err && err != -EBADMSG)
1491 return err;
1492
1493 bus_speed:
1494 /*
1495 * Set the bus speed to the selected bus timing.
1496 * If timing is not selected, backward compatible is the default.
1497 */
1498 mmc_set_bus_speed(card);
1499 return 0;
1500 }
1501
1502 /*
1503 * Execute tuning sequence to seek the proper bus operating
1504 * conditions for HS200 and HS400, which sends CMD21 to the device.
1505 */
1506 static int mmc_hs200_tuning(struct mmc_card *card)
1507 {
1508 struct mmc_host *host = card->host;
1509
1510 /*
1511 * Timing should be adjusted to the HS400 target
1512 * operation frequency for tuning process
1513 */
1514 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1515 host->ios.bus_width == MMC_BUS_WIDTH_8)
1516 if (host->ops->prepare_hs400_tuning)
1517 host->ops->prepare_hs400_tuning(host, &host->ios);
1518
1519 return mmc_execute_tuning(card);
1520 }
1521
1522 /*
1523 * Handle the detection and initialisation of a card.
1524 *
1525 * In the case of a resume, "oldcard" will contain the card
1526 * we're trying to reinitialise.
1527 */
1528 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1529 struct mmc_card *oldcard)
1530 {
1531 struct mmc_card *card;
1532 int err;
1533 u32 cid[4];
1534 u32 rocr;
1535
1536 WARN_ON(!host->claimed);
1537
1538 /* Set correct bus mode for MMC before attempting init */
1539 if (!mmc_host_is_spi(host))
1540 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1541
1542 /*
1543 * Since we're changing the OCR value, we seem to
1544 * need to tell some cards to go back to the idle
1545 * state. We wait 1ms to give cards time to
1546 * respond.
1547 * mmc_go_idle is needed for eMMC that are asleep
1548 */
1549 mmc_go_idle(host);
1550
1551 /* The extra bit indicates that we support high capacity */
1552 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1553 if (err)
1554 goto err;
1555
1556 /*
1557 * For SPI, enable CRC as appropriate.
1558 */
1559 if (mmc_host_is_spi(host)) {
1560 err = mmc_spi_set_crc(host, use_spi_crc);
1561 if (err)
1562 goto err;
1563 }
1564
1565 /*
1566 * Fetch CID from card.
1567 */
1568 err = mmc_send_cid(host, cid);
1569 if (err)
1570 goto err;
1571
1572 if (oldcard) {
1573 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1574 err = -ENOENT;
1575 goto err;
1576 }
1577
1578 card = oldcard;
1579 } else {
1580 /*
1581 * Allocate card structure.
1582 */
1583 card = mmc_alloc_card(host, &mmc_type);
1584 if (IS_ERR(card)) {
1585 err = PTR_ERR(card);
1586 goto err;
1587 }
1588
1589 card->ocr = ocr;
1590 card->type = MMC_TYPE_MMC;
1591 card->rca = 1;
1592 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1593 }
1594
1595 /*
1596 * Call the optional HC's init_card function to handle quirks.
1597 */
1598 if (host->ops->init_card)
1599 host->ops->init_card(host, card);
1600
1601 /*
1602 * For native busses: set card RCA and quit open drain mode.
1603 */
1604 if (!mmc_host_is_spi(host)) {
1605 err = mmc_set_relative_addr(card);
1606 if (err)
1607 goto free_card;
1608
1609 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1610 }
1611
1612 if (!oldcard) {
1613 /*
1614 * Fetch CSD from card.
1615 */
1616 err = mmc_send_csd(card, card->raw_csd);
1617 if (err)
1618 goto free_card;
1619
1620 err = mmc_decode_csd(card);
1621 if (err)
1622 goto free_card;
1623 err = mmc_decode_cid(card);
1624 if (err)
1625 goto free_card;
1626 }
1627
1628 /*
1629 * handling only for cards supporting DSR and hosts requesting
1630 * DSR configuration
1631 */
1632 if (card->csd.dsr_imp && host->dsr_req)
1633 mmc_set_dsr(host);
1634
1635 /*
1636 * Select card, as all following commands rely on that.
1637 */
1638 if (!mmc_host_is_spi(host)) {
1639 err = mmc_select_card(card);
1640 if (err)
1641 goto free_card;
1642 }
1643
1644 if (!oldcard) {
1645 /* Read extended CSD. */
1646 err = mmc_read_ext_csd(card);
1647 if (err)
1648 goto free_card;
1649
1650 /*
1651 * If doing byte addressing, check if required to do sector
1652 * addressing. Handle the case of <2GB cards needing sector
1653 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1654 * ocr register has bit 30 set for sector addressing.
1655 */
1656 if (rocr & BIT(30))
1657 mmc_card_set_blockaddr(card);
1658
1659 /* Erase size depends on CSD and Extended CSD */
1660 mmc_set_erase_size(card);
1661 }
1662
1663 /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
1664 if (card->ext_csd.rev >= 3) {
1665 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1666 EXT_CSD_ERASE_GROUP_DEF, 1,
1667 card->ext_csd.generic_cmd6_time);
1668
1669 if (err && err != -EBADMSG)
1670 goto free_card;
1671
1672 if (err) {
1673 err = 0;
1674 /*
1675 * Just disable enhanced area off & sz
1676 * will try to enable ERASE_GROUP_DEF
1677 * during next time reinit
1678 */
1679 card->ext_csd.enhanced_area_offset = -EINVAL;
1680 card->ext_csd.enhanced_area_size = -EINVAL;
1681 } else {
1682 card->ext_csd.erase_group_def = 1;
1683 /*
1684 * enable ERASE_GRP_DEF successfully.
1685 * This will affect the erase size, so
1686 * here need to reset erase size
1687 */
1688 mmc_set_erase_size(card);
1689 }
1690 }
1691
1692 /*
1693 * Ensure eMMC user default partition is enabled
1694 */
1695 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1696 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1697 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1698 card->ext_csd.part_config,
1699 card->ext_csd.part_time);
1700 if (err && err != -EBADMSG)
1701 goto free_card;
1702 }
1703
1704 /*
1705 * Enable power_off_notification byte in the ext_csd register
1706 */
1707 if (card->ext_csd.rev >= 6) {
1708 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1709 EXT_CSD_POWER_OFF_NOTIFICATION,
1710 EXT_CSD_POWER_ON,
1711 card->ext_csd.generic_cmd6_time);
1712 if (err && err != -EBADMSG)
1713 goto free_card;
1714
1715 /*
1716 * The err can be -EBADMSG or 0,
1717 * so check for success and update the flag
1718 */
1719 if (!err)
1720 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1721 }
1722
1723 /*
1724 * Select timing interface
1725 */
1726 err = mmc_select_timing(card);
1727 if (err)
1728 goto free_card;
1729
1730 if (mmc_card_hs200(card)) {
1731 err = mmc_hs200_tuning(card);
1732 if (err)
1733 goto free_card;
1734
1735 err = mmc_select_hs400(card);
1736 if (err)
1737 goto free_card;
1738 } else if (!mmc_card_hs400es(card)) {
1739 /* Select the desired bus width optionally */
1740 err = mmc_select_bus_width(card);
1741 if (err > 0 && mmc_card_hs(card)) {
1742 err = mmc_select_hs_ddr(card);
1743 if (err)
1744 goto free_card;
1745 }
1746 }
1747
1748 /*
1749 * Choose the power class with selected bus interface
1750 */
1751 mmc_select_powerclass(card);
1752
1753 /*
1754 * Enable HPI feature (if supported)
1755 */
1756 if (card->ext_csd.hpi) {
1757 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1758 EXT_CSD_HPI_MGMT, 1,
1759 card->ext_csd.generic_cmd6_time);
1760 if (err && err != -EBADMSG)
1761 goto free_card;
1762 if (err) {
1763 pr_warn("%s: Enabling HPI failed\n",
1764 mmc_hostname(card->host));
1765 err = 0;
1766 } else
1767 card->ext_csd.hpi_en = 1;
1768 }
1769
1770 /*
1771 * If cache size is higher than 0, this indicates
1772 * the existence of cache and it can be turned on.
1773 */
1774 if (!mmc_card_broken_hpi(card) &&
1775 card->ext_csd.cache_size > 0) {
1776 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1777 EXT_CSD_CACHE_CTRL, 1,
1778 card->ext_csd.generic_cmd6_time);
1779 if (err && err != -EBADMSG)
1780 goto free_card;
1781
1782 /*
1783 * Only if no error, cache is turned on successfully.
1784 */
1785 if (err) {
1786 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1787 mmc_hostname(card->host), err);
1788 card->ext_csd.cache_ctrl = 0;
1789 err = 0;
1790 } else {
1791 card->ext_csd.cache_ctrl = 1;
1792 }
1793 }
1794
1795 /*
1796 * Enable Command Queue if supported. Note that Packed Commands cannot
1797 * be used with Command Queue.
1798 */
1799 card->ext_csd.cmdq_en = false;
1800 if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
1801 err = mmc_cmdq_enable(card);
1802 if (err && err != -EBADMSG)
1803 goto free_card;
1804 if (err) {
1805 pr_warn("%s: Enabling CMDQ failed\n",
1806 mmc_hostname(card->host));
1807 card->ext_csd.cmdq_support = false;
1808 card->ext_csd.cmdq_depth = 0;
1809 err = 0;
1810 }
1811 }
1812 /*
1813 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
1814 * disabled for a time, so a flag is needed to indicate to re-enable the
1815 * Command Queue.
1816 */
1817 card->reenable_cmdq = card->ext_csd.cmdq_en;
1818
1819 if (card->ext_csd.cmdq_en && !host->cqe_enabled) {
1820 err = host->cqe_ops->cqe_enable(host, card);
1821 if (err) {
1822 pr_err("%s: Failed to enable CQE, error %d\n",
1823 mmc_hostname(host), err);
1824 } else {
1825 host->cqe_enabled = true;
1826 pr_info("%s: Command Queue Engine enabled\n",
1827 mmc_hostname(host));
1828 }
1829 }
1830
1831 if (!oldcard)
1832 host->card = card;
1833
1834 return 0;
1835
1836 free_card:
1837 if (!oldcard)
1838 mmc_remove_card(card);
1839 err:
1840 return err;
1841 }
1842
1843 static int mmc_can_sleep(struct mmc_card *card)
1844 {
1845 return (card && card->ext_csd.rev >= 3);
1846 }
1847
1848 static int mmc_sleep(struct mmc_host *host)
1849 {
1850 struct mmc_command cmd = {};
1851 struct mmc_card *card = host->card;
1852 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1853 int err;
1854
1855 /* Re-tuning can't be done once the card is deselected */
1856 mmc_retune_hold(host);
1857
1858 err = mmc_deselect_cards(host);
1859 if (err)
1860 goto out_release;
1861
1862 cmd.opcode = MMC_SLEEP_AWAKE;
1863 cmd.arg = card->rca << 16;
1864 cmd.arg |= 1 << 15;
1865
1866 /*
1867 * If the max_busy_timeout of the host is specified, validate it against
1868 * the sleep cmd timeout. A failure means we need to prevent the host
1869 * from doing hw busy detection, which is done by converting to a R1
1870 * response instead of a R1B.
1871 */
1872 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1873 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1874 } else {
1875 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1876 cmd.busy_timeout = timeout_ms;
1877 }
1878
1879 err = mmc_wait_for_cmd(host, &cmd, 0);
1880 if (err)
1881 goto out_release;
1882
1883 /*
1884 * If the host does not wait while the card signals busy, then we will
1885 * will have to wait the sleep/awake timeout. Note, we cannot use the
1886 * SEND_STATUS command to poll the status because that command (and most
1887 * others) is invalid while the card sleeps.
1888 */
1889 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1890 mmc_delay(timeout_ms);
1891
1892 out_release:
1893 mmc_retune_release(host);
1894 return err;
1895 }
1896
1897 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1898 {
1899 return card &&
1900 mmc_card_mmc(card) &&
1901 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1902 }
1903
1904 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1905 {
1906 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1907 int err;
1908
1909 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1910 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1911 timeout = card->ext_csd.power_off_longtime;
1912
1913 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1914 EXT_CSD_POWER_OFF_NOTIFICATION,
1915 notify_type, timeout, 0, true, false, false);
1916 if (err)
1917 pr_err("%s: Power Off Notification timed out, %u\n",
1918 mmc_hostname(card->host), timeout);
1919
1920 /* Disable the power off notification after the switch operation. */
1921 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1922
1923 return err;
1924 }
1925
1926 /*
1927 * Host is being removed. Free up the current card.
1928 */
1929 static void mmc_remove(struct mmc_host *host)
1930 {
1931 mmc_remove_card(host->card);
1932 host->card = NULL;
1933 }
1934
1935 /*
1936 * Card detection - card is alive.
1937 */
1938 static int mmc_alive(struct mmc_host *host)
1939 {
1940 return mmc_send_status(host->card, NULL);
1941 }
1942
1943 /*
1944 * Card detection callback from host.
1945 */
1946 static void mmc_detect(struct mmc_host *host)
1947 {
1948 int err;
1949
1950 mmc_get_card(host->card, NULL);
1951
1952 /*
1953 * Just check if our card has been removed.
1954 */
1955 err = _mmc_detect_card_removed(host);
1956
1957 mmc_put_card(host->card, NULL);
1958
1959 if (err) {
1960 mmc_remove(host);
1961
1962 mmc_claim_host(host);
1963 mmc_detach_bus(host);
1964 mmc_power_off(host);
1965 mmc_release_host(host);
1966 }
1967 }
1968
1969 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1970 {
1971 int err = 0;
1972 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1973 EXT_CSD_POWER_OFF_LONG;
1974
1975 mmc_claim_host(host);
1976
1977 if (mmc_card_suspended(host->card))
1978 goto out;
1979
1980 if (mmc_card_doing_bkops(host->card)) {
1981 err = mmc_stop_bkops(host->card);
1982 if (err)
1983 goto out;
1984 }
1985
1986 err = mmc_flush_cache(host->card);
1987 if (err)
1988 goto out;
1989
1990 if (mmc_can_poweroff_notify(host->card) &&
1991 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1992 err = mmc_poweroff_notify(host->card, notify_type);
1993 else if (mmc_can_sleep(host->card))
1994 err = mmc_sleep(host);
1995 else if (!mmc_host_is_spi(host))
1996 err = mmc_deselect_cards(host);
1997
1998 if (!err) {
1999 mmc_power_off(host);
2000 mmc_card_set_suspended(host->card);
2001 }
2002 out:
2003 mmc_release_host(host);
2004 return err;
2005 }
2006
2007 /*
2008 * Suspend callback
2009 */
2010 static int mmc_suspend(struct mmc_host *host)
2011 {
2012 int err;
2013
2014 err = _mmc_suspend(host, true);
2015 if (!err) {
2016 pm_runtime_disable(&host->card->dev);
2017 pm_runtime_set_suspended(&host->card->dev);
2018 }
2019
2020 return err;
2021 }
2022
2023 /*
2024 * This function tries to determine if the same card is still present
2025 * and, if so, restore all state to it.
2026 */
2027 static int _mmc_resume(struct mmc_host *host)
2028 {
2029 int err = 0;
2030
2031 mmc_claim_host(host);
2032
2033 if (!mmc_card_suspended(host->card))
2034 goto out;
2035
2036 mmc_power_up(host, host->card->ocr);
2037 err = mmc_init_card(host, host->card->ocr, host->card);
2038 mmc_card_clr_suspended(host->card);
2039
2040 out:
2041 mmc_release_host(host);
2042 return err;
2043 }
2044
2045 /*
2046 * Shutdown callback
2047 */
2048 static int mmc_shutdown(struct mmc_host *host)
2049 {
2050 int err = 0;
2051
2052 /*
2053 * In a specific case for poweroff notify, we need to resume the card
2054 * before we can shutdown it properly.
2055 */
2056 if (mmc_can_poweroff_notify(host->card) &&
2057 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
2058 err = _mmc_resume(host);
2059
2060 if (!err)
2061 err = _mmc_suspend(host, false);
2062
2063 return err;
2064 }
2065
2066 /*
2067 * Callback for resume.
2068 */
2069 static int mmc_resume(struct mmc_host *host)
2070 {
2071 pm_runtime_enable(&host->card->dev);
2072 return 0;
2073 }
2074
2075 /*
2076 * Callback for runtime_suspend.
2077 */
2078 static int mmc_runtime_suspend(struct mmc_host *host)
2079 {
2080 int err;
2081
2082 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2083 return 0;
2084
2085 err = _mmc_suspend(host, true);
2086 if (err)
2087 pr_err("%s: error %d doing aggressive suspend\n",
2088 mmc_hostname(host), err);
2089
2090 return err;
2091 }
2092
2093 /*
2094 * Callback for runtime_resume.
2095 */
2096 static int mmc_runtime_resume(struct mmc_host *host)
2097 {
2098 int err;
2099
2100 err = _mmc_resume(host);
2101 if (err && err != -ENOMEDIUM)
2102 pr_err("%s: error %d doing runtime resume\n",
2103 mmc_hostname(host), err);
2104
2105 return 0;
2106 }
2107
2108 static int mmc_can_reset(struct mmc_card *card)
2109 {
2110 u8 rst_n_function;
2111
2112 rst_n_function = card->ext_csd.rst_n_function;
2113 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2114 return 0;
2115 return 1;
2116 }
2117
2118 static int mmc_reset(struct mmc_host *host)
2119 {
2120 struct mmc_card *card = host->card;
2121
2122 /*
2123 * In the case of recovery, we can't expect flushing the cache to work
2124 * always, but we have a go and ignore errors.
2125 */
2126 mmc_flush_cache(host->card);
2127
2128 if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
2129 mmc_can_reset(card)) {
2130 /* If the card accept RST_n signal, send it. */
2131 mmc_set_clock(host, host->f_init);
2132 host->ops->hw_reset(host);
2133 /* Set initial state and call mmc_set_ios */
2134 mmc_set_initial_state(host);
2135 } else {
2136 /* Do a brute force power cycle */
2137 mmc_power_cycle(host, card->ocr);
2138 mmc_pwrseq_reset(host);
2139 }
2140 return mmc_init_card(host, card->ocr, card);
2141 }
2142
2143 static const struct mmc_bus_ops mmc_ops = {
2144 .remove = mmc_remove,
2145 .detect = mmc_detect,
2146 .suspend = mmc_suspend,
2147 .resume = mmc_resume,
2148 .runtime_suspend = mmc_runtime_suspend,
2149 .runtime_resume = mmc_runtime_resume,
2150 .alive = mmc_alive,
2151 .shutdown = mmc_shutdown,
2152 .reset = mmc_reset,
2153 };
2154
2155 /*
2156 * Starting point for MMC card init.
2157 */
2158 int mmc_attach_mmc(struct mmc_host *host)
2159 {
2160 int err;
2161 u32 ocr, rocr;
2162
2163 WARN_ON(!host->claimed);
2164
2165 /* Set correct bus mode for MMC before attempting attach */
2166 if (!mmc_host_is_spi(host))
2167 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2168
2169 err = mmc_send_op_cond(host, 0, &ocr);
2170 if (err)
2171 return err;
2172
2173 mmc_attach_bus(host, &mmc_ops);
2174 if (host->ocr_avail_mmc)
2175 host->ocr_avail = host->ocr_avail_mmc;
2176
2177 /*
2178 * We need to get OCR a different way for SPI.
2179 */
2180 if (mmc_host_is_spi(host)) {
2181 err = mmc_spi_read_ocr(host, 1, &ocr);
2182 if (err)
2183 goto err;
2184 }
2185
2186 rocr = mmc_select_voltage(host, ocr);
2187
2188 /*
2189 * Can we support the voltage of the card?
2190 */
2191 if (!rocr) {
2192 err = -EINVAL;
2193 goto err;
2194 }
2195
2196 /*
2197 * Detect and init the card.
2198 */
2199 err = mmc_init_card(host, rocr, NULL);
2200 if (err)
2201 goto err;
2202
2203 mmc_release_host(host);
2204 err = mmc_add_card(host->card);
2205 if (err)
2206 goto remove_card;
2207
2208 mmc_claim_host(host);
2209 return 0;
2210
2211 remove_card:
2212 mmc_remove_card(host->card);
2213 mmc_claim_host(host);
2214 host->card = NULL;
2215 err:
2216 mmc_detach_bus(host);
2217
2218 pr_err("%s: error %d whilst initialising MMC card\n",
2219 mmc_hostname(host), err);
2220
2221 return err;
2222 }
Linux with added FPC-III support