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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / mmc / core / mmc.c
blob4dbe3df8024b2cf3ed9206f8d76cff1ba660dc7e
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 "host.h"
25 #include "bus.h"
26 #include "mmc_ops.h"
27 #include "sd_ops.h"
28
29 static const unsigned int tran_exp[] = {
30 10000, 100000, 1000000, 10000000,
31 0, 0, 0, 0
32 };
33
34 static const unsigned char tran_mant[] = {
35 0, 10, 12, 13, 15, 20, 25, 30,
36 35, 40, 45, 50, 55, 60, 70, 80,
37 };
38
39 static const unsigned int tacc_exp[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
41 };
42
43 static const unsigned int tacc_mant[] = {
44 0, 10, 12, 13, 15, 20, 25, 30,
45 35, 40, 45, 50, 55, 60, 70, 80,
46 };
47
48 #define UNSTUFF_BITS(resp,start,size) \
49 ({ \
50 const int __size = size; \
51 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
52 const int __off = 3 - ((start) / 32); \
53 const int __shft = (start) & 31; \
54 u32 __res; \
55 \
56 __res = resp[__off] >> __shft; \
57 if (__size + __shft > 32) \
58 __res |= resp[__off-1] << ((32 - __shft) % 32); \
59 __res & __mask; \
60 })
61
62 /*
63 * Given the decoded CSD structure, decode the raw CID to our CID structure.
64 */
65 static int mmc_decode_cid(struct mmc_card *card)
66 {
67 u32 *resp = card->raw_cid;
68
69 /*
70 * The selection of the format here is based upon published
71 * specs from sandisk and from what people have reported.
72 */
73 switch (card->csd.mmca_vsn) {
74 case 0: /* MMC v1.0 - v1.2 */
75 case 1: /* MMC v1.4 */
76 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
77 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
78 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
79 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
80 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
81 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
82 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
83 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
84 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
85 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
86 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
87 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
88 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
89 break;
90
91 case 2: /* MMC v2.0 - v2.2 */
92 case 3: /* MMC v3.1 - v3.3 */
93 case 4: /* MMC v4 */
94 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
95 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
96 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
97 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
98 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
99 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
100 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
101 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
102 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
103 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
104 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
105 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
106 break;
107
108 default:
109 pr_err("%s: card has unknown MMCA version %d\n",
110 mmc_hostname(card->host), card->csd.mmca_vsn);
111 return -EINVAL;
112 }
113
114 return 0;
115 }
116
117 static void mmc_set_erase_size(struct mmc_card *card)
118 {
119 if (card->ext_csd.erase_group_def & 1)
120 card->erase_size = card->ext_csd.hc_erase_size;
121 else
122 card->erase_size = card->csd.erase_size;
123
124 mmc_init_erase(card);
125 }
126
127 /*
128 * Given a 128-bit response, decode to our card CSD structure.
129 */
130 static int mmc_decode_csd(struct mmc_card *card)
131 {
132 struct mmc_csd *csd = &card->csd;
133 unsigned int e, m, a, b;
134 u32 *resp = card->raw_csd;
135
136 /*
137 * We only understand CSD structure v1.1 and v1.2.
138 * v1.2 has extra information in bits 15, 11 and 10.
139 * We also support eMMC v4.4 & v4.41.
140 */
141 csd->structure = UNSTUFF_BITS(resp, 126, 2);
142 if (csd->structure == 0) {
143 pr_err("%s: unrecognised CSD structure version %d\n",
144 mmc_hostname(card->host), csd->structure);
145 return -EINVAL;
146 }
147
148 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
149 m = UNSTUFF_BITS(resp, 115, 4);
150 e = UNSTUFF_BITS(resp, 112, 3);
151 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
152 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
153
154 m = UNSTUFF_BITS(resp, 99, 4);
155 e = UNSTUFF_BITS(resp, 96, 3);
156 csd->max_dtr = tran_exp[e] * tran_mant[m];
157 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
158
159 e = UNSTUFF_BITS(resp, 47, 3);
160 m = UNSTUFF_BITS(resp, 62, 12);
161 csd->capacity = (1 + m) << (e + 2);
162
163 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
164 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
165 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
166 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
167 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
168 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
169 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
170 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
171
172 if (csd->write_blkbits >= 9) {
173 a = UNSTUFF_BITS(resp, 42, 5);
174 b = UNSTUFF_BITS(resp, 37, 5);
175 csd->erase_size = (a + 1) * (b + 1);
176 csd->erase_size <<= csd->write_blkbits - 9;
177 }
178
179 return 0;
180 }
181
182 static void mmc_select_card_type(struct mmc_card *card)
183 {
184 struct mmc_host *host = card->host;
185 u8 card_type = card->ext_csd.raw_card_type;
186 u32 caps = host->caps, caps2 = host->caps2;
187 unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
188 unsigned int avail_type = 0;
189
190 if (caps & MMC_CAP_MMC_HIGHSPEED &&
191 card_type & EXT_CSD_CARD_TYPE_HS_26) {
192 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
193 avail_type |= EXT_CSD_CARD_TYPE_HS_26;
194 }
195
196 if (caps & MMC_CAP_MMC_HIGHSPEED &&
197 card_type & EXT_CSD_CARD_TYPE_HS_52) {
198 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
199 avail_type |= EXT_CSD_CARD_TYPE_HS_52;
200 }
201
202 if (caps & MMC_CAP_1_8V_DDR &&
203 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
204 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
205 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
206 }
207
208 if (caps & MMC_CAP_1_2V_DDR &&
209 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
210 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
211 avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
212 }
213
214 if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
215 card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
216 hs200_max_dtr = MMC_HS200_MAX_DTR;
217 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
218 }
219
220 if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
221 card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
222 hs200_max_dtr = MMC_HS200_MAX_DTR;
223 avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
224 }
225
226 if (caps2 & MMC_CAP2_HS400_1_8V &&
227 card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
228 hs200_max_dtr = MMC_HS200_MAX_DTR;
229 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
230 }
231
232 if (caps2 & MMC_CAP2_HS400_1_2V &&
233 card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
234 hs200_max_dtr = MMC_HS200_MAX_DTR;
235 avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
236 }
237
238 card->ext_csd.hs_max_dtr = hs_max_dtr;
239 card->ext_csd.hs200_max_dtr = hs200_max_dtr;
240 card->mmc_avail_type = avail_type;
241 }
242
243 static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
244 {
245 u8 hc_erase_grp_sz, hc_wp_grp_sz;
246
247 /*
248 * Disable these attributes by default
249 */
250 card->ext_csd.enhanced_area_offset = -EINVAL;
251 card->ext_csd.enhanced_area_size = -EINVAL;
252
253 /*
254 * Enhanced area feature support -- check whether the eMMC
255 * card has the Enhanced area enabled. If so, export enhanced
256 * area offset and size to user by adding sysfs interface.
257 */
258 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
259 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
260 if (card->ext_csd.partition_setting_completed) {
261 hc_erase_grp_sz =
262 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
263 hc_wp_grp_sz =
264 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
265
266 /*
267 * calculate the enhanced data area offset, in bytes
268 */
269 card->ext_csd.enhanced_area_offset =
270 (((unsigned long long)ext_csd[139]) << 24) +
271 (((unsigned long long)ext_csd[138]) << 16) +
272 (((unsigned long long)ext_csd[137]) << 8) +
273 (((unsigned long long)ext_csd[136]));
274 if (mmc_card_blockaddr(card))
275 card->ext_csd.enhanced_area_offset <<= 9;
276 /*
277 * calculate the enhanced data area size, in kilobytes
278 */
279 card->ext_csd.enhanced_area_size =
280 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
281 ext_csd[140];
282 card->ext_csd.enhanced_area_size *=
283 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
284 card->ext_csd.enhanced_area_size <<= 9;
285 } else {
286 pr_warn("%s: defines enhanced area without partition setting complete\n",
287 mmc_hostname(card->host));
288 }
289 }
290 }
291
292 static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
293 {
294 int idx;
295 u8 hc_erase_grp_sz, hc_wp_grp_sz;
296 unsigned int part_size;
297
298 /*
299 * General purpose partition feature support --
300 * If ext_csd has the size of general purpose partitions,
301 * set size, part_cfg, partition name in mmc_part.
302 */
303 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
304 EXT_CSD_PART_SUPPORT_PART_EN) {
305 hc_erase_grp_sz =
306 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
307 hc_wp_grp_sz =
308 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
309
310 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
311 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
312 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
313 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
314 continue;
315 if (card->ext_csd.partition_setting_completed == 0) {
316 pr_warn("%s: has partition size defined without partition complete\n",
317 mmc_hostname(card->host));
318 break;
319 }
320 part_size =
321 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
322 << 16) +
323 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
324 << 8) +
325 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
326 part_size *= (size_t)(hc_erase_grp_sz *
327 hc_wp_grp_sz);
328 mmc_part_add(card, part_size << 19,
329 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
330 "gp%d", idx, false,
331 MMC_BLK_DATA_AREA_GP);
332 }
333 }
334 }
335
336 /*
337 * Decode extended CSD.
338 */
339 static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
340 {
341 int err = 0, idx;
342 unsigned int part_size;
343 struct device_node *np;
344 bool broken_hpi = false;
345
346 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
347 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
348 if (card->csd.structure == 3) {
349 if (card->ext_csd.raw_ext_csd_structure > 2) {
350 pr_err("%s: unrecognised EXT_CSD structure "
351 "version %d\n", mmc_hostname(card->host),
352 card->ext_csd.raw_ext_csd_structure);
353 err = -EINVAL;
354 goto out;
355 }
356 }
357
358 np = mmc_of_find_child_device(card->host, 0);
359 if (np && of_device_is_compatible(np, "mmc-card"))
360 broken_hpi = of_property_read_bool(np, "broken-hpi");
361 of_node_put(np);
362
363 /*
364 * The EXT_CSD format is meant to be forward compatible. As long
365 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
366 * are authorized, see JEDEC JESD84-B50 section B.8.
367 */
368 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
369
370 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
371 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
372 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
373 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
374 if (card->ext_csd.rev >= 2) {
375 card->ext_csd.sectors =
376 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
377 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
378 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
379 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
380
381 /* Cards with density > 2GiB are sector addressed */
382 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
383 mmc_card_set_blockaddr(card);
384 }
385
386 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
387 mmc_select_card_type(card);
388
389 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
390 card->ext_csd.raw_erase_timeout_mult =
391 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
392 card->ext_csd.raw_hc_erase_grp_size =
393 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
394 if (card->ext_csd.rev >= 3) {
395 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
396 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
397
398 /* EXT_CSD value is in units of 10ms, but we store in ms */
399 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
400
401 /* Sleep / awake timeout in 100ns units */
402 if (sa_shift > 0 && sa_shift <= 0x17)
403 card->ext_csd.sa_timeout =
404 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
405 card->ext_csd.erase_group_def =
406 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
407 card->ext_csd.hc_erase_timeout = 300 *
408 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
409 card->ext_csd.hc_erase_size =
410 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
411
412 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
413
414 /*
415 * There are two boot regions of equal size, defined in
416 * multiples of 128K.
417 */
418 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
419 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
420 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
421 mmc_part_add(card, part_size,
422 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
423 "boot%d", idx, true,
424 MMC_BLK_DATA_AREA_BOOT);
425 }
426 }
427 }
428
429 card->ext_csd.raw_hc_erase_gap_size =
430 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
431 card->ext_csd.raw_sec_trim_mult =
432 ext_csd[EXT_CSD_SEC_TRIM_MULT];
433 card->ext_csd.raw_sec_erase_mult =
434 ext_csd[EXT_CSD_SEC_ERASE_MULT];
435 card->ext_csd.raw_sec_feature_support =
436 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
437 card->ext_csd.raw_trim_mult =
438 ext_csd[EXT_CSD_TRIM_MULT];
439 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
440 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
441 if (card->ext_csd.rev >= 4) {
442 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
443 EXT_CSD_PART_SETTING_COMPLETED)
444 card->ext_csd.partition_setting_completed = 1;
445 else
446 card->ext_csd.partition_setting_completed = 0;
447
448 mmc_manage_enhanced_area(card, ext_csd);
449
450 mmc_manage_gp_partitions(card, ext_csd);
451
452 card->ext_csd.sec_trim_mult =
453 ext_csd[EXT_CSD_SEC_TRIM_MULT];
454 card->ext_csd.sec_erase_mult =
455 ext_csd[EXT_CSD_SEC_ERASE_MULT];
456 card->ext_csd.sec_feature_support =
457 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
458 card->ext_csd.trim_timeout = 300 *
459 ext_csd[EXT_CSD_TRIM_MULT];
460
461 /*
462 * Note that the call to mmc_part_add above defaults to read
463 * only. If this default assumption is changed, the call must
464 * take into account the value of boot_locked below.
465 */
466 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
467 card->ext_csd.boot_ro_lockable = true;
468
469 /* Save power class values */
470 card->ext_csd.raw_pwr_cl_52_195 =
471 ext_csd[EXT_CSD_PWR_CL_52_195];
472 card->ext_csd.raw_pwr_cl_26_195 =
473 ext_csd[EXT_CSD_PWR_CL_26_195];
474 card->ext_csd.raw_pwr_cl_52_360 =
475 ext_csd[EXT_CSD_PWR_CL_52_360];
476 card->ext_csd.raw_pwr_cl_26_360 =
477 ext_csd[EXT_CSD_PWR_CL_26_360];
478 card->ext_csd.raw_pwr_cl_200_195 =
479 ext_csd[EXT_CSD_PWR_CL_200_195];
480 card->ext_csd.raw_pwr_cl_200_360 =
481 ext_csd[EXT_CSD_PWR_CL_200_360];
482 card->ext_csd.raw_pwr_cl_ddr_52_195 =
483 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
484 card->ext_csd.raw_pwr_cl_ddr_52_360 =
485 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
486 card->ext_csd.raw_pwr_cl_ddr_200_360 =
487 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
488 }
489
490 if (card->ext_csd.rev >= 5) {
491 /* Adjust production date as per JEDEC JESD84-B451 */
492 if (card->cid.year < 2010)
493 card->cid.year += 16;
494
495 /* check whether the eMMC card supports BKOPS */
496 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
497 card->ext_csd.bkops = 1;
498 card->ext_csd.man_bkops_en =
499 (ext_csd[EXT_CSD_BKOPS_EN] &
500 EXT_CSD_MANUAL_BKOPS_MASK);
501 card->ext_csd.raw_bkops_status =
502 ext_csd[EXT_CSD_BKOPS_STATUS];
503 if (!card->ext_csd.man_bkops_en)
504 pr_debug("%s: MAN_BKOPS_EN bit is not set\n",
505 mmc_hostname(card->host));
506 }
507
508 /* check whether the eMMC card supports HPI */
509 if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
510 card->ext_csd.hpi = 1;
511 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
512 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
513 else
514 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
515 /*
516 * Indicate the maximum timeout to close
517 * a command interrupted by HPI
518 */
519 card->ext_csd.out_of_int_time =
520 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
521 }
522
523 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
524 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
525
526 /*
527 * RPMB regions are defined in multiples of 128K.
528 */
529 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
530 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
531 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
532 EXT_CSD_PART_CONFIG_ACC_RPMB,
533 "rpmb", 0, false,
534 MMC_BLK_DATA_AREA_RPMB);
535 }
536 }
537
538 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
539 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
540 card->erased_byte = 0xFF;
541 else
542 card->erased_byte = 0x0;
543
544 /* eMMC v4.5 or later */
545 if (card->ext_csd.rev >= 6) {
546 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
547
548 card->ext_csd.generic_cmd6_time = 10 *
549 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
550 card->ext_csd.power_off_longtime = 10 *
551 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
552
553 card->ext_csd.cache_size =
554 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
555 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
556 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
557 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
558
559 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
560 card->ext_csd.data_sector_size = 4096;
561 else
562 card->ext_csd.data_sector_size = 512;
563
564 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
565 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
566 card->ext_csd.data_tag_unit_size =
567 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
568 (card->ext_csd.data_sector_size);
569 } else {
570 card->ext_csd.data_tag_unit_size = 0;
571 }
572
573 card->ext_csd.max_packed_writes =
574 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
575 card->ext_csd.max_packed_reads =
576 ext_csd[EXT_CSD_MAX_PACKED_READS];
577 } else {
578 card->ext_csd.data_sector_size = 512;
579 }
580
581 /* eMMC v5 or later */
582 if (card->ext_csd.rev >= 7) {
583 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
584 MMC_FIRMWARE_LEN);
585 card->ext_csd.ffu_capable =
586 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
587 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
588 }
589 out:
590 return err;
591 }
592
593 static int mmc_read_ext_csd(struct mmc_card *card)
594 {
595 u8 *ext_csd;
596 int err;
597
598 if (!mmc_can_ext_csd(card))
599 return 0;
600
601 err = mmc_get_ext_csd(card, &ext_csd);
602 if (err) {
603 /* If the host or the card can't do the switch,
604 * fail more gracefully. */
605 if ((err != -EINVAL)
606 && (err != -ENOSYS)
607 && (err != -EFAULT))
608 return err;
609
610 /*
611 * High capacity cards should have this "magic" size
612 * stored in their CSD.
613 */
614 if (card->csd.capacity == (4096 * 512)) {
615 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
616 mmc_hostname(card->host));
617 } else {
618 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
619 mmc_hostname(card->host));
620 err = 0;
621 }
622
623 return err;
624 }
625
626 err = mmc_decode_ext_csd(card, ext_csd);
627 kfree(ext_csd);
628 return err;
629 }
630
631 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
632 {
633 u8 *bw_ext_csd;
634 int err;
635
636 if (bus_width == MMC_BUS_WIDTH_1)
637 return 0;
638
639 err = mmc_get_ext_csd(card, &bw_ext_csd);
640 if (err)
641 return err;
642
643 /* only compare read only fields */
644 err = !((card->ext_csd.raw_partition_support ==
645 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
646 (card->ext_csd.raw_erased_mem_count ==
647 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
648 (card->ext_csd.rev ==
649 bw_ext_csd[EXT_CSD_REV]) &&
650 (card->ext_csd.raw_ext_csd_structure ==
651 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
652 (card->ext_csd.raw_card_type ==
653 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
654 (card->ext_csd.raw_s_a_timeout ==
655 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
656 (card->ext_csd.raw_hc_erase_gap_size ==
657 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
658 (card->ext_csd.raw_erase_timeout_mult ==
659 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
660 (card->ext_csd.raw_hc_erase_grp_size ==
661 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
662 (card->ext_csd.raw_sec_trim_mult ==
663 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
664 (card->ext_csd.raw_sec_erase_mult ==
665 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
666 (card->ext_csd.raw_sec_feature_support ==
667 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
668 (card->ext_csd.raw_trim_mult ==
669 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
670 (card->ext_csd.raw_sectors[0] ==
671 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
672 (card->ext_csd.raw_sectors[1] ==
673 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
674 (card->ext_csd.raw_sectors[2] ==
675 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
676 (card->ext_csd.raw_sectors[3] ==
677 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
678 (card->ext_csd.raw_pwr_cl_52_195 ==
679 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
680 (card->ext_csd.raw_pwr_cl_26_195 ==
681 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
682 (card->ext_csd.raw_pwr_cl_52_360 ==
683 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
684 (card->ext_csd.raw_pwr_cl_26_360 ==
685 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
686 (card->ext_csd.raw_pwr_cl_200_195 ==
687 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
688 (card->ext_csd.raw_pwr_cl_200_360 ==
689 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
690 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
691 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
692 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
693 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
694 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
695 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
696
697 if (err)
698 err = -EINVAL;
699
700 kfree(bw_ext_csd);
701 return err;
702 }
703
704 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
705 card->raw_cid[2], card->raw_cid[3]);
706 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
707 card->raw_csd[2], card->raw_csd[3]);
708 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
709 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
710 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
711 MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
712 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
713 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
714 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
715 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
716 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
717 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
718 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
719 card->ext_csd.enhanced_area_offset);
720 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
721 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
722 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
723
724 static ssize_t mmc_fwrev_show(struct device *dev,
725 struct device_attribute *attr,
726 char *buf)
727 {
728 struct mmc_card *card = mmc_dev_to_card(dev);
729
730 if (card->ext_csd.rev < 7) {
731 return sprintf(buf, "0x%x\n", card->cid.fwrev);
732 } else {
733 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
734 card->ext_csd.fwrev);
735 }
736 }
737
738 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
739
740 static struct attribute *mmc_std_attrs[] = {
741 &dev_attr_cid.attr,
742 &dev_attr_csd.attr,
743 &dev_attr_date.attr,
744 &dev_attr_erase_size.attr,
745 &dev_attr_preferred_erase_size.attr,
746 &dev_attr_fwrev.attr,
747 &dev_attr_ffu_capable.attr,
748 &dev_attr_hwrev.attr,
749 &dev_attr_manfid.attr,
750 &dev_attr_name.attr,
751 &dev_attr_oemid.attr,
752 &dev_attr_prv.attr,
753 &dev_attr_serial.attr,
754 &dev_attr_enhanced_area_offset.attr,
755 &dev_attr_enhanced_area_size.attr,
756 &dev_attr_raw_rpmb_size_mult.attr,
757 &dev_attr_rel_sectors.attr,
758 NULL,
759 };
760 ATTRIBUTE_GROUPS(mmc_std);
761
762 static struct device_type mmc_type = {
763 .groups = mmc_std_groups,
764 };
765
766 /*
767 * Select the PowerClass for the current bus width
768 * If power class is defined for 4/8 bit bus in the
769 * extended CSD register, select it by executing the
770 * mmc_switch command.
771 */
772 static int __mmc_select_powerclass(struct mmc_card *card,
773 unsigned int bus_width)
774 {
775 struct mmc_host *host = card->host;
776 struct mmc_ext_csd *ext_csd = &card->ext_csd;
777 unsigned int pwrclass_val = 0;
778 int err = 0;
779
780 switch (1 << host->ios.vdd) {
781 case MMC_VDD_165_195:
782 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
783 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
784 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
785 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
786 ext_csd->raw_pwr_cl_52_195 :
787 ext_csd->raw_pwr_cl_ddr_52_195;
788 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
789 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
790 break;
791 case MMC_VDD_27_28:
792 case MMC_VDD_28_29:
793 case MMC_VDD_29_30:
794 case MMC_VDD_30_31:
795 case MMC_VDD_31_32:
796 case MMC_VDD_32_33:
797 case MMC_VDD_33_34:
798 case MMC_VDD_34_35:
799 case MMC_VDD_35_36:
800 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
801 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
802 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
803 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
804 ext_csd->raw_pwr_cl_52_360 :
805 ext_csd->raw_pwr_cl_ddr_52_360;
806 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
807 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
808 ext_csd->raw_pwr_cl_ddr_200_360 :
809 ext_csd->raw_pwr_cl_200_360;
810 break;
811 default:
812 pr_warn("%s: Voltage range not supported for power class\n",
813 mmc_hostname(host));
814 return -EINVAL;
815 }
816
817 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
818 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
819 EXT_CSD_PWR_CL_8BIT_SHIFT;
820 else
821 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
822 EXT_CSD_PWR_CL_4BIT_SHIFT;
823
824 /* If the power class is different from the default value */
825 if (pwrclass_val > 0) {
826 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
827 EXT_CSD_POWER_CLASS,
828 pwrclass_val,
829 card->ext_csd.generic_cmd6_time);
830 }
831
832 return err;
833 }
834
835 static int mmc_select_powerclass(struct mmc_card *card)
836 {
837 struct mmc_host *host = card->host;
838 u32 bus_width, ext_csd_bits;
839 int err, ddr;
840
841 /* Power class selection is supported for versions >= 4.0 */
842 if (!mmc_can_ext_csd(card))
843 return 0;
844
845 bus_width = host->ios.bus_width;
846 /* Power class values are defined only for 4/8 bit bus */
847 if (bus_width == MMC_BUS_WIDTH_1)
848 return 0;
849
850 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
851 if (ddr)
852 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
853 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
854 else
855 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
856 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
857
858 err = __mmc_select_powerclass(card, ext_csd_bits);
859 if (err)
860 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
861 mmc_hostname(host), 1 << bus_width, ddr);
862
863 return err;
864 }
865
866 /*
867 * Set the bus speed for the selected speed mode.
868 */
869 static void mmc_set_bus_speed(struct mmc_card *card)
870 {
871 unsigned int max_dtr = (unsigned int)-1;
872
873 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
874 max_dtr > card->ext_csd.hs200_max_dtr)
875 max_dtr = card->ext_csd.hs200_max_dtr;
876 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
877 max_dtr = card->ext_csd.hs_max_dtr;
878 else if (max_dtr > card->csd.max_dtr)
879 max_dtr = card->csd.max_dtr;
880
881 mmc_set_clock(card->host, max_dtr);
882 }
883
884 /*
885 * Select the bus width amoung 4-bit and 8-bit(SDR).
886 * If the bus width is changed successfully, return the selected width value.
887 * Zero is returned instead of error value if the wide width is not supported.
888 */
889 static int mmc_select_bus_width(struct mmc_card *card)
890 {
891 static unsigned ext_csd_bits[] = {
892 EXT_CSD_BUS_WIDTH_8,
893 EXT_CSD_BUS_WIDTH_4,
894 };
895 static unsigned bus_widths[] = {
896 MMC_BUS_WIDTH_8,
897 MMC_BUS_WIDTH_4,
898 };
899 struct mmc_host *host = card->host;
900 unsigned idx, bus_width = 0;
901 int err = 0;
902
903 if (!mmc_can_ext_csd(card) ||
904 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
905 return 0;
906
907 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
908
909 /*
910 * Unlike SD, MMC cards dont have a configuration register to notify
911 * supported bus width. So bus test command should be run to identify
912 * the supported bus width or compare the ext csd values of current
913 * bus width and ext csd values of 1 bit mode read earlier.
914 */
915 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
916 /*
917 * Host is capable of 8bit transfer, then switch
918 * the device to work in 8bit transfer mode. If the
919 * mmc switch command returns error then switch to
920 * 4bit transfer mode. On success set the corresponding
921 * bus width on the host.
922 */
923 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
924 EXT_CSD_BUS_WIDTH,
925 ext_csd_bits[idx],
926 card->ext_csd.generic_cmd6_time);
927 if (err)
928 continue;
929
930 bus_width = bus_widths[idx];
931 mmc_set_bus_width(host, bus_width);
932
933 /*
934 * If controller can't handle bus width test,
935 * compare ext_csd previously read in 1 bit mode
936 * against ext_csd at new bus width
937 */
938 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
939 err = mmc_compare_ext_csds(card, bus_width);
940 else
941 err = mmc_bus_test(card, bus_width);
942
943 if (!err) {
944 err = bus_width;
945 break;
946 } else {
947 pr_warn("%s: switch to bus width %d failed\n",
948 mmc_hostname(host), 1 << bus_width);
949 }
950 }
951
952 return err;
953 }
954
955 /*
956 * Switch to the high-speed mode
957 */
958 static int mmc_select_hs(struct mmc_card *card)
959 {
960 int err;
961
962 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
963 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
964 card->ext_csd.generic_cmd6_time,
965 true, true, true);
966 if (!err)
967 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
968
969 return err;
970 }
971
972 /*
973 * Activate wide bus and DDR if supported.
974 */
975 static int mmc_select_hs_ddr(struct mmc_card *card)
976 {
977 struct mmc_host *host = card->host;
978 u32 bus_width, ext_csd_bits;
979 int err = 0;
980
981 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
982 return 0;
983
984 bus_width = host->ios.bus_width;
985 if (bus_width == MMC_BUS_WIDTH_1)
986 return 0;
987
988 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
989 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
990
991 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
992 EXT_CSD_BUS_WIDTH,
993 ext_csd_bits,
994 card->ext_csd.generic_cmd6_time);
995 if (err) {
996 pr_err("%s: switch to bus width %d ddr failed\n",
997 mmc_hostname(host), 1 << bus_width);
998 return err;
999 }
1000
1001 /*
1002 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1003 * signaling.
1004 *
1005 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1006 *
1007 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1008 * in the JEDEC spec for DDR.
1009 *
1010 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1011 * host controller can support this, like some of the SDHCI
1012 * controller which connect to an eMMC device. Some of these
1013 * host controller still needs to use 1.8v vccq for supporting
1014 * DDR mode.
1015 *
1016 * So the sequence will be:
1017 * if (host and device can both support 1.2v IO)
1018 * use 1.2v IO;
1019 * else if (host and device can both support 1.8v IO)
1020 * use 1.8v IO;
1021 * so if host and device can only support 3.3v IO, this is the
1022 * last choice.
1023 *
1024 * WARNING: eMMC rules are NOT the same as SD DDR
1025 */
1026 err = -EINVAL;
1027 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1028 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1029
1030 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1031 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1032
1033 /* make sure vccq is 3.3v after switching disaster */
1034 if (err)
1035 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1036
1037 if (!err)
1038 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1039
1040 return err;
1041 }
1042
1043 /* Caller must hold re-tuning */
1044 static int mmc_switch_status(struct mmc_card *card)
1045 {
1046 u32 status;
1047 int err;
1048
1049 err = mmc_send_status(card, &status);
1050 if (err)
1051 return err;
1052
1053 return mmc_switch_status_error(card->host, status);
1054 }
1055
1056 static int mmc_select_hs400(struct mmc_card *card)
1057 {
1058 struct mmc_host *host = card->host;
1059 bool send_status = true;
1060 unsigned int max_dtr;
1061 int err = 0;
1062 u8 val;
1063
1064 /*
1065 * HS400 mode requires 8-bit bus width
1066 */
1067 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1068 host->ios.bus_width == MMC_BUS_WIDTH_8))
1069 return 0;
1070
1071 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1072 send_status = false;
1073
1074 /* Reduce frequency to HS frequency */
1075 max_dtr = card->ext_csd.hs_max_dtr;
1076 mmc_set_clock(host, max_dtr);
1077
1078 /* Switch card to HS mode */
1079 val = EXT_CSD_TIMING_HS;
1080 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1081 EXT_CSD_HS_TIMING, val,
1082 card->ext_csd.generic_cmd6_time,
1083 true, send_status, true);
1084 if (err) {
1085 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1086 mmc_hostname(host), err);
1087 return err;
1088 }
1089
1090 /* Set host controller to HS timing */
1091 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1092
1093 if (!send_status) {
1094 err = mmc_switch_status(card);
1095 if (err)
1096 goto out_err;
1097 }
1098
1099 /* Switch card to DDR */
1100 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1101 EXT_CSD_BUS_WIDTH,
1102 EXT_CSD_DDR_BUS_WIDTH_8,
1103 card->ext_csd.generic_cmd6_time);
1104 if (err) {
1105 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1106 mmc_hostname(host), err);
1107 return err;
1108 }
1109
1110 /* Switch card to HS400 */
1111 val = EXT_CSD_TIMING_HS400 |
1112 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1113 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1114 EXT_CSD_HS_TIMING, val,
1115 card->ext_csd.generic_cmd6_time,
1116 true, send_status, true);
1117 if (err) {
1118 pr_err("%s: switch to hs400 failed, err:%d\n",
1119 mmc_hostname(host), err);
1120 return err;
1121 }
1122
1123 /* Set host controller to HS400 timing and frequency */
1124 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1125 mmc_set_bus_speed(card);
1126
1127 if (!send_status) {
1128 err = mmc_switch_status(card);
1129 if (err)
1130 goto out_err;
1131 }
1132
1133 return 0;
1134
1135 out_err:
1136 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1137 __func__, err);
1138 return err;
1139 }
1140
1141 int mmc_hs200_to_hs400(struct mmc_card *card)
1142 {
1143 return mmc_select_hs400(card);
1144 }
1145
1146 int mmc_hs400_to_hs200(struct mmc_card *card)
1147 {
1148 struct mmc_host *host = card->host;
1149 bool send_status = true;
1150 unsigned int max_dtr;
1151 int err;
1152 u8 val;
1153
1154 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1155 send_status = false;
1156
1157 /* Reduce frequency to HS */
1158 max_dtr = card->ext_csd.hs_max_dtr;
1159 mmc_set_clock(host, max_dtr);
1160
1161 /* Switch HS400 to HS DDR */
1162 val = EXT_CSD_TIMING_HS;
1163 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1164 val, card->ext_csd.generic_cmd6_time,
1165 true, send_status, true);
1166 if (err)
1167 goto out_err;
1168
1169 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1170
1171 if (!send_status) {
1172 err = mmc_switch_status(card);
1173 if (err)
1174 goto out_err;
1175 }
1176
1177 /* Switch HS DDR to HS */
1178 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1179 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1180 true, send_status, true);
1181 if (err)
1182 goto out_err;
1183
1184 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1185
1186 if (!send_status) {
1187 err = mmc_switch_status(card);
1188 if (err)
1189 goto out_err;
1190 }
1191
1192 /* Switch HS to HS200 */
1193 val = EXT_CSD_TIMING_HS200 |
1194 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1195 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1196 val, card->ext_csd.generic_cmd6_time, true,
1197 send_status, true);
1198 if (err)
1199 goto out_err;
1200
1201 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1202
1203 if (!send_status) {
1204 err = mmc_switch_status(card);
1205 if (err)
1206 goto out_err;
1207 }
1208
1209 mmc_set_bus_speed(card);
1210
1211 return 0;
1212
1213 out_err:
1214 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1215 __func__, err);
1216 return err;
1217 }
1218
1219 static void mmc_select_driver_type(struct mmc_card *card)
1220 {
1221 int card_drv_type, drive_strength, drv_type;
1222
1223 card_drv_type = card->ext_csd.raw_driver_strength |
1224 mmc_driver_type_mask(0);
1225
1226 drive_strength = mmc_select_drive_strength(card,
1227 card->ext_csd.hs200_max_dtr,
1228 card_drv_type, &drv_type);
1229
1230 card->drive_strength = drive_strength;
1231
1232 if (drv_type)
1233 mmc_set_driver_type(card->host, drv_type);
1234 }
1235
1236 /*
1237 * For device supporting HS200 mode, the following sequence
1238 * should be done before executing the tuning process.
1239 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1240 * 2. switch to HS200 mode
1241 * 3. set the clock to > 52Mhz and <=200MHz
1242 */
1243 static int mmc_select_hs200(struct mmc_card *card)
1244 {
1245 struct mmc_host *host = card->host;
1246 bool send_status = true;
1247 unsigned int old_timing;
1248 int err = -EINVAL;
1249 u8 val;
1250
1251 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1252 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1253
1254 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1255 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1256
1257 /* If fails try again during next card power cycle */
1258 if (err)
1259 goto err;
1260
1261 mmc_select_driver_type(card);
1262
1263 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1264 send_status = false;
1265
1266 /*
1267 * Set the bus width(4 or 8) with host's support and
1268 * switch to HS200 mode if bus width is set successfully.
1269 */
1270 err = mmc_select_bus_width(card);
1271 if (!IS_ERR_VALUE(err)) {
1272 val = EXT_CSD_TIMING_HS200 |
1273 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1274 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1275 EXT_CSD_HS_TIMING, val,
1276 card->ext_csd.generic_cmd6_time,
1277 true, send_status, true);
1278 if (err)
1279 goto err;
1280 old_timing = host->ios.timing;
1281 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1282 if (!send_status) {
1283 err = mmc_switch_status(card);
1284 /*
1285 * mmc_select_timing() assumes timing has not changed if
1286 * it is a switch error.
1287 */
1288 if (err == -EBADMSG)
1289 mmc_set_timing(host, old_timing);
1290 }
1291 }
1292 err:
1293 if (err)
1294 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1295 __func__, err);
1296 return err;
1297 }
1298
1299 /*
1300 * Activate High Speed or HS200 mode if supported.
1301 */
1302 static int mmc_select_timing(struct mmc_card *card)
1303 {
1304 int err = 0;
1305
1306 if (!mmc_can_ext_csd(card))
1307 goto bus_speed;
1308
1309 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1310 err = mmc_select_hs200(card);
1311 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1312 err = mmc_select_hs(card);
1313
1314 if (err && err != -EBADMSG)
1315 return err;
1316
1317 if (err) {
1318 pr_warn("%s: switch to %s failed\n",
1319 mmc_card_hs(card) ? "high-speed" :
1320 (mmc_card_hs200(card) ? "hs200" : ""),
1321 mmc_hostname(card->host));
1322 err = 0;
1323 }
1324
1325 bus_speed:
1326 /*
1327 * Set the bus speed to the selected bus timing.
1328 * If timing is not selected, backward compatible is the default.
1329 */
1330 mmc_set_bus_speed(card);
1331 return err;
1332 }
1333
1334 /*
1335 * Execute tuning sequence to seek the proper bus operating
1336 * conditions for HS200 and HS400, which sends CMD21 to the device.
1337 */
1338 static int mmc_hs200_tuning(struct mmc_card *card)
1339 {
1340 struct mmc_host *host = card->host;
1341
1342 /*
1343 * Timing should be adjusted to the HS400 target
1344 * operation frequency for tuning process
1345 */
1346 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1347 host->ios.bus_width == MMC_BUS_WIDTH_8)
1348 if (host->ops->prepare_hs400_tuning)
1349 host->ops->prepare_hs400_tuning(host, &host->ios);
1350
1351 return mmc_execute_tuning(card);
1352 }
1353
1354 /*
1355 * Handle the detection and initialisation of a card.
1356 *
1357 * In the case of a resume, "oldcard" will contain the card
1358 * we're trying to reinitialise.
1359 */
1360 static int mmc_init_card(struct mmc_host *host, u32 ocr,
1361 struct mmc_card *oldcard)
1362 {
1363 struct mmc_card *card;
1364 int err;
1365 u32 cid[4];
1366 u32 rocr;
1367
1368 BUG_ON(!host);
1369 WARN_ON(!host->claimed);
1370
1371 /* Set correct bus mode for MMC before attempting init */
1372 if (!mmc_host_is_spi(host))
1373 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1374
1375 /*
1376 * Since we're changing the OCR value, we seem to
1377 * need to tell some cards to go back to the idle
1378 * state. We wait 1ms to give cards time to
1379 * respond.
1380 * mmc_go_idle is needed for eMMC that are asleep
1381 */
1382 mmc_go_idle(host);
1383
1384 /* The extra bit indicates that we support high capacity */
1385 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1386 if (err)
1387 goto err;
1388
1389 /*
1390 * For SPI, enable CRC as appropriate.
1391 */
1392 if (mmc_host_is_spi(host)) {
1393 err = mmc_spi_set_crc(host, use_spi_crc);
1394 if (err)
1395 goto err;
1396 }
1397
1398 /*
1399 * Fetch CID from card.
1400 */
1401 if (mmc_host_is_spi(host))
1402 err = mmc_send_cid(host, cid);
1403 else
1404 err = mmc_all_send_cid(host, cid);
1405 if (err)
1406 goto err;
1407
1408 if (oldcard) {
1409 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1410 err = -ENOENT;
1411 goto err;
1412 }
1413
1414 card = oldcard;
1415 } else {
1416 /*
1417 * Allocate card structure.
1418 */
1419 card = mmc_alloc_card(host, &mmc_type);
1420 if (IS_ERR(card)) {
1421 err = PTR_ERR(card);
1422 goto err;
1423 }
1424
1425 card->ocr = ocr;
1426 card->type = MMC_TYPE_MMC;
1427 card->rca = 1;
1428 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1429 }
1430
1431 /*
1432 * Call the optional HC's init_card function to handle quirks.
1433 */
1434 if (host->ops->init_card)
1435 host->ops->init_card(host, card);
1436
1437 /*
1438 * For native busses: set card RCA and quit open drain mode.
1439 */
1440 if (!mmc_host_is_spi(host)) {
1441 err = mmc_set_relative_addr(card);
1442 if (err)
1443 goto free_card;
1444
1445 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1446 }
1447
1448 if (!oldcard) {
1449 /*
1450 * Fetch CSD from card.
1451 */
1452 err = mmc_send_csd(card, card->raw_csd);
1453 if (err)
1454 goto free_card;
1455
1456 err = mmc_decode_csd(card);
1457 if (err)
1458 goto free_card;
1459 err = mmc_decode_cid(card);
1460 if (err)
1461 goto free_card;
1462 }
1463
1464 /*
1465 * handling only for cards supporting DSR and hosts requesting
1466 * DSR configuration
1467 */
1468 if (card->csd.dsr_imp && host->dsr_req)
1469 mmc_set_dsr(host);
1470
1471 /*
1472 * Select card, as all following commands rely on that.
1473 */
1474 if (!mmc_host_is_spi(host)) {
1475 err = mmc_select_card(card);
1476 if (err)
1477 goto free_card;
1478 }
1479
1480 if (!oldcard) {
1481 /* Read extended CSD. */
1482 err = mmc_read_ext_csd(card);
1483 if (err)
1484 goto free_card;
1485
1486 /* If doing byte addressing, check if required to do sector
1487 * addressing. Handle the case of <2GB cards needing sector
1488 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1489 * ocr register has bit 30 set for sector addressing.
1490 */
1491 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1492 mmc_card_set_blockaddr(card);
1493
1494 /* Erase size depends on CSD and Extended CSD */
1495 mmc_set_erase_size(card);
1496 }
1497
1498 /*
1499 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1500 * bit. This bit will be lost every time after a reset or power off.
1501 */
1502 if (card->ext_csd.partition_setting_completed ||
1503 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1504 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1505 EXT_CSD_ERASE_GROUP_DEF, 1,
1506 card->ext_csd.generic_cmd6_time);
1507
1508 if (err && err != -EBADMSG)
1509 goto free_card;
1510
1511 if (err) {
1512 err = 0;
1513 /*
1514 * Just disable enhanced area off & sz
1515 * will try to enable ERASE_GROUP_DEF
1516 * during next time reinit
1517 */
1518 card->ext_csd.enhanced_area_offset = -EINVAL;
1519 card->ext_csd.enhanced_area_size = -EINVAL;
1520 } else {
1521 card->ext_csd.erase_group_def = 1;
1522 /*
1523 * enable ERASE_GRP_DEF successfully.
1524 * This will affect the erase size, so
1525 * here need to reset erase size
1526 */
1527 mmc_set_erase_size(card);
1528 }
1529 }
1530
1531 /*
1532 * Ensure eMMC user default partition is enabled
1533 */
1534 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1535 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1536 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1537 card->ext_csd.part_config,
1538 card->ext_csd.part_time);
1539 if (err && err != -EBADMSG)
1540 goto free_card;
1541 }
1542
1543 /*
1544 * Enable power_off_notification byte in the ext_csd register
1545 */
1546 if (card->ext_csd.rev >= 6) {
1547 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1548 EXT_CSD_POWER_OFF_NOTIFICATION,
1549 EXT_CSD_POWER_ON,
1550 card->ext_csd.generic_cmd6_time);
1551 if (err && err != -EBADMSG)
1552 goto free_card;
1553
1554 /*
1555 * The err can be -EBADMSG or 0,
1556 * so check for success and update the flag
1557 */
1558 if (!err)
1559 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1560 }
1561
1562 /*
1563 * Select timing interface
1564 */
1565 err = mmc_select_timing(card);
1566 if (err)
1567 goto free_card;
1568
1569 if (mmc_card_hs200(card)) {
1570 err = mmc_hs200_tuning(card);
1571 if (err)
1572 goto free_card;
1573
1574 err = mmc_select_hs400(card);
1575 if (err)
1576 goto free_card;
1577 } else if (mmc_card_hs(card)) {
1578 /* Select the desired bus width optionally */
1579 err = mmc_select_bus_width(card);
1580 if (!IS_ERR_VALUE(err)) {
1581 err = mmc_select_hs_ddr(card);
1582 if (err)
1583 goto free_card;
1584 }
1585 }
1586
1587 /*
1588 * Choose the power class with selected bus interface
1589 */
1590 mmc_select_powerclass(card);
1591
1592 /*
1593 * Enable HPI feature (if supported)
1594 */
1595 if (card->ext_csd.hpi) {
1596 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1597 EXT_CSD_HPI_MGMT, 1,
1598 card->ext_csd.generic_cmd6_time);
1599 if (err && err != -EBADMSG)
1600 goto free_card;
1601 if (err) {
1602 pr_warn("%s: Enabling HPI failed\n",
1603 mmc_hostname(card->host));
1604 err = 0;
1605 } else
1606 card->ext_csd.hpi_en = 1;
1607 }
1608
1609 /*
1610 * If cache size is higher than 0, this indicates
1611 * the existence of cache and it can be turned on.
1612 */
1613 if (card->ext_csd.cache_size > 0) {
1614 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1615 EXT_CSD_CACHE_CTRL, 1,
1616 card->ext_csd.generic_cmd6_time);
1617 if (err && err != -EBADMSG)
1618 goto free_card;
1619
1620 /*
1621 * Only if no error, cache is turned on successfully.
1622 */
1623 if (err) {
1624 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1625 mmc_hostname(card->host), err);
1626 card->ext_csd.cache_ctrl = 0;
1627 err = 0;
1628 } else {
1629 card->ext_csd.cache_ctrl = 1;
1630 }
1631 }
1632
1633 /*
1634 * The mandatory minimum values are defined for packed command.
1635 * read: 5, write: 3
1636 */
1637 if (card->ext_csd.max_packed_writes >= 3 &&
1638 card->ext_csd.max_packed_reads >= 5 &&
1639 host->caps2 & MMC_CAP2_PACKED_CMD) {
1640 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1641 EXT_CSD_EXP_EVENTS_CTRL,
1642 EXT_CSD_PACKED_EVENT_EN,
1643 card->ext_csd.generic_cmd6_time);
1644 if (err && err != -EBADMSG)
1645 goto free_card;
1646 if (err) {
1647 pr_warn("%s: Enabling packed event failed\n",
1648 mmc_hostname(card->host));
1649 card->ext_csd.packed_event_en = 0;
1650 err = 0;
1651 } else {
1652 card->ext_csd.packed_event_en = 1;
1653 }
1654 }
1655
1656 if (!oldcard)
1657 host->card = card;
1658
1659 return 0;
1660
1661 free_card:
1662 if (!oldcard)
1663 mmc_remove_card(card);
1664 err:
1665 return err;
1666 }
1667
1668 static int mmc_can_sleep(struct mmc_card *card)
1669 {
1670 return (card && card->ext_csd.rev >= 3);
1671 }
1672
1673 static int mmc_sleep(struct mmc_host *host)
1674 {
1675 struct mmc_command cmd = {0};
1676 struct mmc_card *card = host->card;
1677 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1678 int err;
1679
1680 /* Re-tuning can't be done once the card is deselected */
1681 mmc_retune_hold(host);
1682
1683 err = mmc_deselect_cards(host);
1684 if (err)
1685 goto out_release;
1686
1687 cmd.opcode = MMC_SLEEP_AWAKE;
1688 cmd.arg = card->rca << 16;
1689 cmd.arg |= 1 << 15;
1690
1691 /*
1692 * If the max_busy_timeout of the host is specified, validate it against
1693 * the sleep cmd timeout. A failure means we need to prevent the host
1694 * from doing hw busy detection, which is done by converting to a R1
1695 * response instead of a R1B.
1696 */
1697 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1698 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1699 } else {
1700 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1701 cmd.busy_timeout = timeout_ms;
1702 }
1703
1704 err = mmc_wait_for_cmd(host, &cmd, 0);
1705 if (err)
1706 goto out_release;
1707
1708 /*
1709 * If the host does not wait while the card signals busy, then we will
1710 * will have to wait the sleep/awake timeout. Note, we cannot use the
1711 * SEND_STATUS command to poll the status because that command (and most
1712 * others) is invalid while the card sleeps.
1713 */
1714 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1715 mmc_delay(timeout_ms);
1716
1717 out_release:
1718 mmc_retune_release(host);
1719 return err;
1720 }
1721
1722 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1723 {
1724 return card &&
1725 mmc_card_mmc(card) &&
1726 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1727 }
1728
1729 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1730 {
1731 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1732 int err;
1733
1734 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1735 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1736 timeout = card->ext_csd.power_off_longtime;
1737
1738 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1739 EXT_CSD_POWER_OFF_NOTIFICATION,
1740 notify_type, timeout, true, false, false);
1741 if (err)
1742 pr_err("%s: Power Off Notification timed out, %u\n",
1743 mmc_hostname(card->host), timeout);
1744
1745 /* Disable the power off notification after the switch operation. */
1746 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1747
1748 return err;
1749 }
1750
1751 /*
1752 * Host is being removed. Free up the current card.
1753 */
1754 static void mmc_remove(struct mmc_host *host)
1755 {
1756 BUG_ON(!host);
1757 BUG_ON(!host->card);
1758
1759 mmc_remove_card(host->card);
1760 host->card = NULL;
1761 }
1762
1763 /*
1764 * Card detection - card is alive.
1765 */
1766 static int mmc_alive(struct mmc_host *host)
1767 {
1768 return mmc_send_status(host->card, NULL);
1769 }
1770
1771 /*
1772 * Card detection callback from host.
1773 */
1774 static void mmc_detect(struct mmc_host *host)
1775 {
1776 int err;
1777
1778 BUG_ON(!host);
1779 BUG_ON(!host->card);
1780
1781 mmc_get_card(host->card);
1782
1783 /*
1784 * Just check if our card has been removed.
1785 */
1786 err = _mmc_detect_card_removed(host);
1787
1788 mmc_put_card(host->card);
1789
1790 if (err) {
1791 mmc_remove(host);
1792
1793 mmc_claim_host(host);
1794 mmc_detach_bus(host);
1795 mmc_power_off(host);
1796 mmc_release_host(host);
1797 }
1798 }
1799
1800 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1801 {
1802 int err = 0;
1803 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1804 EXT_CSD_POWER_OFF_LONG;
1805
1806 BUG_ON(!host);
1807 BUG_ON(!host->card);
1808
1809 mmc_claim_host(host);
1810
1811 if (mmc_card_suspended(host->card))
1812 goto out;
1813
1814 if (mmc_card_doing_bkops(host->card)) {
1815 err = mmc_stop_bkops(host->card);
1816 if (err)
1817 goto out;
1818 }
1819
1820 err = mmc_flush_cache(host->card);
1821 if (err)
1822 goto out;
1823
1824 if (mmc_can_poweroff_notify(host->card) &&
1825 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1826 err = mmc_poweroff_notify(host->card, notify_type);
1827 else if (mmc_can_sleep(host->card))
1828 err = mmc_sleep(host);
1829 else if (!mmc_host_is_spi(host))
1830 err = mmc_deselect_cards(host);
1831
1832 if (!err) {
1833 mmc_power_off(host);
1834 mmc_card_set_suspended(host->card);
1835 }
1836 out:
1837 mmc_release_host(host);
1838 return err;
1839 }
1840
1841 /*
1842 * Suspend callback
1843 */
1844 static int mmc_suspend(struct mmc_host *host)
1845 {
1846 int err;
1847
1848 err = _mmc_suspend(host, true);
1849 if (!err) {
1850 pm_runtime_disable(&host->card->dev);
1851 pm_runtime_set_suspended(&host->card->dev);
1852 }
1853
1854 return err;
1855 }
1856
1857 /*
1858 * This function tries to determine if the same card is still present
1859 * and, if so, restore all state to it.
1860 */
1861 static int _mmc_resume(struct mmc_host *host)
1862 {
1863 int err = 0;
1864
1865 BUG_ON(!host);
1866 BUG_ON(!host->card);
1867
1868 mmc_claim_host(host);
1869
1870 if (!mmc_card_suspended(host->card))
1871 goto out;
1872
1873 mmc_power_up(host, host->card->ocr);
1874 err = mmc_init_card(host, host->card->ocr, host->card);
1875 mmc_card_clr_suspended(host->card);
1876
1877 out:
1878 mmc_release_host(host);
1879 return err;
1880 }
1881
1882 /*
1883 * Shutdown callback
1884 */
1885 static int mmc_shutdown(struct mmc_host *host)
1886 {
1887 int err = 0;
1888
1889 /*
1890 * In a specific case for poweroff notify, we need to resume the card
1891 * before we can shutdown it properly.
1892 */
1893 if (mmc_can_poweroff_notify(host->card) &&
1894 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1895 err = _mmc_resume(host);
1896
1897 if (!err)
1898 err = _mmc_suspend(host, false);
1899
1900 return err;
1901 }
1902
1903 /*
1904 * Callback for resume.
1905 */
1906 static int mmc_resume(struct mmc_host *host)
1907 {
1908 pm_runtime_enable(&host->card->dev);
1909 return 0;
1910 }
1911
1912 /*
1913 * Callback for runtime_suspend.
1914 */
1915 static int mmc_runtime_suspend(struct mmc_host *host)
1916 {
1917 int err;
1918
1919 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1920 return 0;
1921
1922 err = _mmc_suspend(host, true);
1923 if (err)
1924 pr_err("%s: error %d doing aggressive suspend\n",
1925 mmc_hostname(host), err);
1926
1927 return err;
1928 }
1929
1930 /*
1931 * Callback for runtime_resume.
1932 */
1933 static int mmc_runtime_resume(struct mmc_host *host)
1934 {
1935 int err;
1936
1937 err = _mmc_resume(host);
1938 if (err && err != -ENOMEDIUM)
1939 pr_err("%s: error %d doing runtime resume\n",
1940 mmc_hostname(host), err);
1941
1942 return 0;
1943 }
1944
1945 int mmc_can_reset(struct mmc_card *card)
1946 {
1947 u8 rst_n_function;
1948
1949 rst_n_function = card->ext_csd.rst_n_function;
1950 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
1951 return 0;
1952 return 1;
1953 }
1954 EXPORT_SYMBOL(mmc_can_reset);
1955
1956 static int mmc_reset(struct mmc_host *host)
1957 {
1958 struct mmc_card *card = host->card;
1959
1960 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
1961 return -EOPNOTSUPP;
1962
1963 if (!mmc_can_reset(card))
1964 return -EOPNOTSUPP;
1965
1966 mmc_set_clock(host, host->f_init);
1967
1968 host->ops->hw_reset(host);
1969
1970 /* Set initial state and call mmc_set_ios */
1971 mmc_set_initial_state(host);
1972
1973 return mmc_init_card(host, card->ocr, card);
1974 }
1975
1976 static const struct mmc_bus_ops mmc_ops = {
1977 .remove = mmc_remove,
1978 .detect = mmc_detect,
1979 .suspend = mmc_suspend,
1980 .resume = mmc_resume,
1981 .runtime_suspend = mmc_runtime_suspend,
1982 .runtime_resume = mmc_runtime_resume,
1983 .alive = mmc_alive,
1984 .shutdown = mmc_shutdown,
1985 .reset = mmc_reset,
1986 };
1987
1988 /*
1989 * Starting point for MMC card init.
1990 */
1991 int mmc_attach_mmc(struct mmc_host *host)
1992 {
1993 int err;
1994 u32 ocr, rocr;
1995
1996 BUG_ON(!host);
1997 WARN_ON(!host->claimed);
1998
1999 /* Set correct bus mode for MMC before attempting attach */
2000 if (!mmc_host_is_spi(host))
2001 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2002
2003 err = mmc_send_op_cond(host, 0, &ocr);
2004 if (err)
2005 return err;
2006
2007 mmc_attach_bus(host, &mmc_ops);
2008 if (host->ocr_avail_mmc)
2009 host->ocr_avail = host->ocr_avail_mmc;
2010
2011 /*
2012 * We need to get OCR a different way for SPI.
2013 */
2014 if (mmc_host_is_spi(host)) {
2015 err = mmc_spi_read_ocr(host, 1, &ocr);
2016 if (err)
2017 goto err;
2018 }
2019
2020 rocr = mmc_select_voltage(host, ocr);
2021
2022 /*
2023 * Can we support the voltage of the card?
2024 */
2025 if (!rocr) {
2026 err = -EINVAL;
2027 goto err;
2028 }
2029
2030 /*
2031 * Detect and init the card.
2032 */
2033 err = mmc_init_card(host, rocr, NULL);
2034 if (err)
2035 goto err;
2036
2037 mmc_release_host(host);
2038 err = mmc_add_card(host->card);
2039 if (err)
2040 goto remove_card;
2041
2042 mmc_claim_host(host);
2043 return 0;
2044
2045 remove_card:
2046 mmc_remove_card(host->card);
2047 mmc_claim_host(host);
2048 host->card = NULL;
2049 err:
2050 mmc_detach_bus(host);
2051
2052 pr_err("%s: error %d whilst initialising MMC card\n",
2053 mmc_hostname(host), err);
2054
2055 return err;
2056 }
CRIS linux kernel tree