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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / mmc / core / mmc.c
blob98e9eb0f6643149f6b589cb1319b2a0a0905ee1d
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/slab.h>
15 #include <linux/stat.h>
16 #include <linux/pm_runtime.h>
17
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/mmc.h>
21
22 #include "core.h"
23 #include "bus.h"
24 #include "mmc_ops.h"
25 #include "sd_ops.h"
26
27 static const unsigned int tran_exp[] = {
28 10000, 100000, 1000000, 10000000,
29 0, 0, 0, 0
30 };
31
32 static const unsigned char tran_mant[] = {
33 0, 10, 12, 13, 15, 20, 25, 30,
34 35, 40, 45, 50, 55, 60, 70, 80,
35 };
36
37 static const unsigned int tacc_exp[] = {
38 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
39 };
40
41 static const unsigned int tacc_mant[] = {
42 0, 10, 12, 13, 15, 20, 25, 30,
43 35, 40, 45, 50, 55, 60, 70, 80,
44 };
45
46 #define UNSTUFF_BITS(resp,start,size) \
47 ({ \
48 const int __size = size; \
49 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
50 const int __off = 3 - ((start) / 32); \
51 const int __shft = (start) & 31; \
52 u32 __res; \
53 \
54 __res = resp[__off] >> __shft; \
55 if (__size + __shft > 32) \
56 __res |= resp[__off-1] << ((32 - __shft) % 32); \
57 __res & __mask; \
58 })
59
60 /*
61 * Given the decoded CSD structure, decode the raw CID to our CID structure.
62 */
63 static int mmc_decode_cid(struct mmc_card *card)
64 {
65 u32 *resp = card->raw_cid;
66
67 /*
68 * The selection of the format here is based upon published
69 * specs from sandisk and from what people have reported.
70 */
71 switch (card->csd.mmca_vsn) {
72 case 0: /* MMC v1.0 - v1.2 */
73 case 1: /* MMC v1.4 */
74 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
75 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
76 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
77 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
78 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
79 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
80 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
81 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
82 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
83 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
84 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
85 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
86 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
87 break;
88
89 case 2: /* MMC v2.0 - v2.2 */
90 case 3: /* MMC v3.1 - v3.3 */
91 case 4: /* MMC v4 */
92 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
93 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
94 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
95 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
96 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
97 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
98 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
99 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
100 card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
101 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
102 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
103 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
104 break;
105
106 default:
107 pr_err("%s: card has unknown MMCA version %d\n",
108 mmc_hostname(card->host), card->csd.mmca_vsn);
109 return -EINVAL;
110 }
111
112 return 0;
113 }
114
115 static void mmc_set_erase_size(struct mmc_card *card)
116 {
117 if (card->ext_csd.erase_group_def & 1)
118 card->erase_size = card->ext_csd.hc_erase_size;
119 else
120 card->erase_size = card->csd.erase_size;
121
122 mmc_init_erase(card);
123 }
124
125 /*
126 * Given a 128-bit response, decode to our card CSD structure.
127 */
128 static int mmc_decode_csd(struct mmc_card *card)
129 {
130 struct mmc_csd *csd = &card->csd;
131 unsigned int e, m, a, b;
132 u32 *resp = card->raw_csd;
133
134 /*
135 * We only understand CSD structure v1.1 and v1.2.
136 * v1.2 has extra information in bits 15, 11 and 10.
137 * We also support eMMC v4.4 & v4.41.
138 */
139 csd->structure = UNSTUFF_BITS(resp, 126, 2);
140 if (csd->structure == 0) {
141 pr_err("%s: unrecognised CSD structure version %d\n",
142 mmc_hostname(card->host), csd->structure);
143 return -EINVAL;
144 }
145
146 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
147 m = UNSTUFF_BITS(resp, 115, 4);
148 e = UNSTUFF_BITS(resp, 112, 3);
149 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
150 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
151
152 m = UNSTUFF_BITS(resp, 99, 4);
153 e = UNSTUFF_BITS(resp, 96, 3);
154 csd->max_dtr = tran_exp[e] * tran_mant[m];
155 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
156
157 e = UNSTUFF_BITS(resp, 47, 3);
158 m = UNSTUFF_BITS(resp, 62, 12);
159 csd->capacity = (1 + m) << (e + 2);
160
161 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
162 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
163 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
164 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
165 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
166 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
167 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
168
169 if (csd->write_blkbits >= 9) {
170 a = UNSTUFF_BITS(resp, 42, 5);
171 b = UNSTUFF_BITS(resp, 37, 5);
172 csd->erase_size = (a + 1) * (b + 1);
173 csd->erase_size <<= csd->write_blkbits - 9;
174 }
175
176 return 0;
177 }
178
179 /*
180 * Read extended CSD.
181 */
182 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
183 {
184 int err;
185 u8 *ext_csd;
186
187 BUG_ON(!card);
188 BUG_ON(!new_ext_csd);
189
190 *new_ext_csd = NULL;
191
192 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
193 return 0;
194
195 /*
196 * As the ext_csd is so large and mostly unused, we don't store the
197 * raw block in mmc_card.
198 */
199 ext_csd = kmalloc(512, GFP_KERNEL);
200 if (!ext_csd) {
201 pr_err("%s: could not allocate a buffer to "
202 "receive the ext_csd.\n", mmc_hostname(card->host));
203 return -ENOMEM;
204 }
205
206 err = mmc_send_ext_csd(card, ext_csd);
207 if (err) {
208 kfree(ext_csd);
209 *new_ext_csd = NULL;
210
211 /* If the host or the card can't do the switch,
212 * fail more gracefully. */
213 if ((err != -EINVAL)
214 && (err != -ENOSYS)
215 && (err != -EFAULT))
216 return err;
217
218 /*
219 * High capacity cards should have this "magic" size
220 * stored in their CSD.
221 */
222 if (card->csd.capacity == (4096 * 512)) {
223 pr_err("%s: unable to read EXT_CSD "
224 "on a possible high capacity card. "
225 "Card will be ignored.\n",
226 mmc_hostname(card->host));
227 } else {
228 pr_warning("%s: unable to read "
229 "EXT_CSD, performance might "
230 "suffer.\n",
231 mmc_hostname(card->host));
232 err = 0;
233 }
234 } else
235 *new_ext_csd = ext_csd;
236
237 return err;
238 }
239
240 static void mmc_select_card_type(struct mmc_card *card)
241 {
242 struct mmc_host *host = card->host;
243 u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK;
244 u32 caps = host->caps, caps2 = host->caps2;
245 unsigned int hs_max_dtr = 0;
246
247 if (card_type & EXT_CSD_CARD_TYPE_26)
248 hs_max_dtr = MMC_HIGH_26_MAX_DTR;
249
250 if (caps & MMC_CAP_MMC_HIGHSPEED &&
251 card_type & EXT_CSD_CARD_TYPE_52)
252 hs_max_dtr = MMC_HIGH_52_MAX_DTR;
253
254 if ((caps & MMC_CAP_1_8V_DDR &&
255 card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) ||
256 (caps & MMC_CAP_1_2V_DDR &&
257 card_type & EXT_CSD_CARD_TYPE_DDR_1_2V))
258 hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
259
260 if ((caps2 & MMC_CAP2_HS200_1_8V_SDR &&
261 card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) ||
262 (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
263 card_type & EXT_CSD_CARD_TYPE_SDR_1_2V))
264 hs_max_dtr = MMC_HS200_MAX_DTR;
265
266 card->ext_csd.hs_max_dtr = hs_max_dtr;
267 card->ext_csd.card_type = card_type;
268 }
269
270 /*
271 * Decode extended CSD.
272 */
273 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
274 {
275 int err = 0, idx;
276 unsigned int part_size;
277 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
278
279 BUG_ON(!card);
280
281 if (!ext_csd)
282 return 0;
283
284 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
285 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
286 if (card->csd.structure == 3) {
287 if (card->ext_csd.raw_ext_csd_structure > 2) {
288 pr_err("%s: unrecognised EXT_CSD structure "
289 "version %d\n", mmc_hostname(card->host),
290 card->ext_csd.raw_ext_csd_structure);
291 err = -EINVAL;
292 goto out;
293 }
294 }
295
296 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
297 if (card->ext_csd.rev > 7) {
298 pr_err("%s: unrecognised EXT_CSD revision %d\n",
299 mmc_hostname(card->host), card->ext_csd.rev);
300 err = -EINVAL;
301 goto out;
302 }
303
304 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
305 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
306 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
307 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
308 if (card->ext_csd.rev >= 2) {
309 card->ext_csd.sectors =
310 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
311 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
312 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
313 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
314
315 /* Cards with density > 2GiB are sector addressed */
316 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
317 mmc_card_set_blockaddr(card);
318 }
319
320 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
321 mmc_select_card_type(card);
322
323 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
324 card->ext_csd.raw_erase_timeout_mult =
325 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
326 card->ext_csd.raw_hc_erase_grp_size =
327 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
328 if (card->ext_csd.rev >= 3) {
329 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
330 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
331
332 /* EXT_CSD value is in units of 10ms, but we store in ms */
333 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
334
335 /* Sleep / awake timeout in 100ns units */
336 if (sa_shift > 0 && sa_shift <= 0x17)
337 card->ext_csd.sa_timeout =
338 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
339 card->ext_csd.erase_group_def =
340 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
341 card->ext_csd.hc_erase_timeout = 300 *
342 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
343 card->ext_csd.hc_erase_size =
344 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
345
346 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
347
348 /*
349 * There are two boot regions of equal size, defined in
350 * multiples of 128K.
351 */
352 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
353 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
354 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
355 mmc_part_add(card, part_size,
356 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
357 "boot%d", idx, true,
358 MMC_BLK_DATA_AREA_BOOT);
359 }
360 }
361 }
362
363 card->ext_csd.raw_hc_erase_gap_size =
364 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
365 card->ext_csd.raw_sec_trim_mult =
366 ext_csd[EXT_CSD_SEC_TRIM_MULT];
367 card->ext_csd.raw_sec_erase_mult =
368 ext_csd[EXT_CSD_SEC_ERASE_MULT];
369 card->ext_csd.raw_sec_feature_support =
370 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
371 card->ext_csd.raw_trim_mult =
372 ext_csd[EXT_CSD_TRIM_MULT];
373 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
374 if (card->ext_csd.rev >= 4) {
375 /*
376 * Enhanced area feature support -- check whether the eMMC
377 * card has the Enhanced area enabled. If so, export enhanced
378 * area offset and size to user by adding sysfs interface.
379 */
380 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
381 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
382 hc_erase_grp_sz =
383 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
384 hc_wp_grp_sz =
385 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
386
387 card->ext_csd.enhanced_area_en = 1;
388 /*
389 * calculate the enhanced data area offset, in bytes
390 */
391 card->ext_csd.enhanced_area_offset =
392 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
393 (ext_csd[137] << 8) + ext_csd[136];
394 if (mmc_card_blockaddr(card))
395 card->ext_csd.enhanced_area_offset <<= 9;
396 /*
397 * calculate the enhanced data area size, in kilobytes
398 */
399 card->ext_csd.enhanced_area_size =
400 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
401 ext_csd[140];
402 card->ext_csd.enhanced_area_size *=
403 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
404 card->ext_csd.enhanced_area_size <<= 9;
405 } else {
406 /*
407 * If the enhanced area is not enabled, disable these
408 * device attributes.
409 */
410 card->ext_csd.enhanced_area_offset = -EINVAL;
411 card->ext_csd.enhanced_area_size = -EINVAL;
412 }
413
414 /*
415 * General purpose partition feature support --
416 * If ext_csd has the size of general purpose partitions,
417 * set size, part_cfg, partition name in mmc_part.
418 */
419 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
420 EXT_CSD_PART_SUPPORT_PART_EN) {
421 if (card->ext_csd.enhanced_area_en != 1) {
422 hc_erase_grp_sz =
423 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
424 hc_wp_grp_sz =
425 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
426
427 card->ext_csd.enhanced_area_en = 1;
428 }
429
430 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
431 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
432 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
433 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
434 continue;
435 part_size =
436 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
437 << 16) +
438 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
439 << 8) +
440 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
441 part_size *= (size_t)(hc_erase_grp_sz *
442 hc_wp_grp_sz);
443 mmc_part_add(card, part_size << 19,
444 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
445 "gp%d", idx, false,
446 MMC_BLK_DATA_AREA_GP);
447 }
448 }
449 card->ext_csd.sec_trim_mult =
450 ext_csd[EXT_CSD_SEC_TRIM_MULT];
451 card->ext_csd.sec_erase_mult =
452 ext_csd[EXT_CSD_SEC_ERASE_MULT];
453 card->ext_csd.sec_feature_support =
454 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
455 card->ext_csd.trim_timeout = 300 *
456 ext_csd[EXT_CSD_TRIM_MULT];
457
458 /*
459 * Note that the call to mmc_part_add above defaults to read
460 * only. If this default assumption is changed, the call must
461 * take into account the value of boot_locked below.
462 */
463 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
464 card->ext_csd.boot_ro_lockable = true;
465
466 /* Save power class values */
467 card->ext_csd.raw_pwr_cl_52_195 =
468 ext_csd[EXT_CSD_PWR_CL_52_195];
469 card->ext_csd.raw_pwr_cl_26_195 =
470 ext_csd[EXT_CSD_PWR_CL_26_195];
471 card->ext_csd.raw_pwr_cl_52_360 =
472 ext_csd[EXT_CSD_PWR_CL_52_360];
473 card->ext_csd.raw_pwr_cl_26_360 =
474 ext_csd[EXT_CSD_PWR_CL_26_360];
475 card->ext_csd.raw_pwr_cl_200_195 =
476 ext_csd[EXT_CSD_PWR_CL_200_195];
477 card->ext_csd.raw_pwr_cl_200_360 =
478 ext_csd[EXT_CSD_PWR_CL_200_360];
479 card->ext_csd.raw_pwr_cl_ddr_52_195 =
480 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
481 card->ext_csd.raw_pwr_cl_ddr_52_360 =
482 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
483 }
484
485 if (card->ext_csd.rev >= 5) {
486 /* Adjust production date as per JEDEC JESD84-B451 */
487 if (card->cid.year < 2010)
488 card->cid.year += 16;
489
490 /* check whether the eMMC card supports BKOPS */
491 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
492 card->ext_csd.bkops = 1;
493 card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
494 card->ext_csd.raw_bkops_status =
495 ext_csd[EXT_CSD_BKOPS_STATUS];
496 if (!card->ext_csd.bkops_en)
497 pr_info("%s: BKOPS_EN bit is not set\n",
498 mmc_hostname(card->host));
499 }
500
501 /* check whether the eMMC card supports HPI */
502 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
503 card->ext_csd.hpi = 1;
504 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
505 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
506 else
507 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
508 /*
509 * Indicate the maximum timeout to close
510 * a command interrupted by HPI
511 */
512 card->ext_csd.out_of_int_time =
513 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
514 }
515
516 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
517 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
518
519 /*
520 * RPMB regions are defined in multiples of 128K.
521 */
522 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
523 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
524 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
525 EXT_CSD_PART_CONFIG_ACC_RPMB,
526 "rpmb", 0, false,
527 MMC_BLK_DATA_AREA_RPMB);
528 }
529 }
530
531 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
532 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
533 card->erased_byte = 0xFF;
534 else
535 card->erased_byte = 0x0;
536
537 /* eMMC v4.5 or later */
538 if (card->ext_csd.rev >= 6) {
539 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
540
541 card->ext_csd.generic_cmd6_time = 10 *
542 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
543 card->ext_csd.power_off_longtime = 10 *
544 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
545
546 card->ext_csd.cache_size =
547 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
548 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
549 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
550 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
551
552 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
553 card->ext_csd.data_sector_size = 4096;
554 else
555 card->ext_csd.data_sector_size = 512;
556
557 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
558 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
559 card->ext_csd.data_tag_unit_size =
560 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
561 (card->ext_csd.data_sector_size);
562 } else {
563 card->ext_csd.data_tag_unit_size = 0;
564 }
565
566 card->ext_csd.max_packed_writes =
567 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
568 card->ext_csd.max_packed_reads =
569 ext_csd[EXT_CSD_MAX_PACKED_READS];
570 } else {
571 card->ext_csd.data_sector_size = 512;
572 }
573
574 out:
575 return err;
576 }
577
578 static inline void mmc_free_ext_csd(u8 *ext_csd)
579 {
580 kfree(ext_csd);
581 }
582
583
584 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
585 {
586 u8 *bw_ext_csd;
587 int err;
588
589 if (bus_width == MMC_BUS_WIDTH_1)
590 return 0;
591
592 err = mmc_get_ext_csd(card, &bw_ext_csd);
593
594 if (err || bw_ext_csd == NULL) {
595 err = -EINVAL;
596 goto out;
597 }
598
599 /* only compare read only fields */
600 err = !((card->ext_csd.raw_partition_support ==
601 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
602 (card->ext_csd.raw_erased_mem_count ==
603 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
604 (card->ext_csd.rev ==
605 bw_ext_csd[EXT_CSD_REV]) &&
606 (card->ext_csd.raw_ext_csd_structure ==
607 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
608 (card->ext_csd.raw_card_type ==
609 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
610 (card->ext_csd.raw_s_a_timeout ==
611 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
612 (card->ext_csd.raw_hc_erase_gap_size ==
613 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
614 (card->ext_csd.raw_erase_timeout_mult ==
615 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
616 (card->ext_csd.raw_hc_erase_grp_size ==
617 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
618 (card->ext_csd.raw_sec_trim_mult ==
619 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
620 (card->ext_csd.raw_sec_erase_mult ==
621 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
622 (card->ext_csd.raw_sec_feature_support ==
623 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
624 (card->ext_csd.raw_trim_mult ==
625 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
626 (card->ext_csd.raw_sectors[0] ==
627 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
628 (card->ext_csd.raw_sectors[1] ==
629 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
630 (card->ext_csd.raw_sectors[2] ==
631 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
632 (card->ext_csd.raw_sectors[3] ==
633 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
634 (card->ext_csd.raw_pwr_cl_52_195 ==
635 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
636 (card->ext_csd.raw_pwr_cl_26_195 ==
637 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
638 (card->ext_csd.raw_pwr_cl_52_360 ==
639 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
640 (card->ext_csd.raw_pwr_cl_26_360 ==
641 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
642 (card->ext_csd.raw_pwr_cl_200_195 ==
643 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
644 (card->ext_csd.raw_pwr_cl_200_360 ==
645 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
646 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
647 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
648 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
649 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]));
650 if (err)
651 err = -EINVAL;
652
653 out:
654 mmc_free_ext_csd(bw_ext_csd);
655 return err;
656 }
657
658 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
659 card->raw_cid[2], card->raw_cid[3]);
660 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
661 card->raw_csd[2], card->raw_csd[3]);
662 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
663 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
664 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
665 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
666 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
667 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
668 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
669 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
670 MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
671 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
672 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
673 card->ext_csd.enhanced_area_offset);
674 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
675 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
676 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
677
678 static struct attribute *mmc_std_attrs[] = {
679 &dev_attr_cid.attr,
680 &dev_attr_csd.attr,
681 &dev_attr_date.attr,
682 &dev_attr_erase_size.attr,
683 &dev_attr_preferred_erase_size.attr,
684 &dev_attr_fwrev.attr,
685 &dev_attr_hwrev.attr,
686 &dev_attr_manfid.attr,
687 &dev_attr_name.attr,
688 &dev_attr_oemid.attr,
689 &dev_attr_prv.attr,
690 &dev_attr_serial.attr,
691 &dev_attr_enhanced_area_offset.attr,
692 &dev_attr_enhanced_area_size.attr,
693 &dev_attr_raw_rpmb_size_mult.attr,
694 &dev_attr_rel_sectors.attr,
695 NULL,
696 };
697
698 static struct attribute_group mmc_std_attr_group = {
699 .attrs = mmc_std_attrs,
700 };
701
702 static const struct attribute_group *mmc_attr_groups[] = {
703 &mmc_std_attr_group,
704 NULL,
705 };
706
707 static struct device_type mmc_type = {
708 .groups = mmc_attr_groups,
709 };
710
711 /*
712 * Select the PowerClass for the current bus width
713 * If power class is defined for 4/8 bit bus in the
714 * extended CSD register, select it by executing the
715 * mmc_switch command.
716 */
717 static int mmc_select_powerclass(struct mmc_card *card,
718 unsigned int bus_width)
719 {
720 int err = 0;
721 unsigned int pwrclass_val = 0;
722 struct mmc_host *host;
723
724 BUG_ON(!card);
725
726 host = card->host;
727 BUG_ON(!host);
728
729 /* Power class selection is supported for versions >= 4.0 */
730 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
731 return 0;
732
733 /* Power class values are defined only for 4/8 bit bus */
734 if (bus_width == EXT_CSD_BUS_WIDTH_1)
735 return 0;
736
737 switch (1 << host->ios.vdd) {
738 case MMC_VDD_165_195:
739 if (host->ios.clock <= 26000000)
740 pwrclass_val = card->ext_csd.raw_pwr_cl_26_195;
741 else if (host->ios.clock <= 52000000)
742 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
743 card->ext_csd.raw_pwr_cl_52_195 :
744 card->ext_csd.raw_pwr_cl_ddr_52_195;
745 else if (host->ios.clock <= 200000000)
746 pwrclass_val = card->ext_csd.raw_pwr_cl_200_195;
747 break;
748 case MMC_VDD_27_28:
749 case MMC_VDD_28_29:
750 case MMC_VDD_29_30:
751 case MMC_VDD_30_31:
752 case MMC_VDD_31_32:
753 case MMC_VDD_32_33:
754 case MMC_VDD_33_34:
755 case MMC_VDD_34_35:
756 case MMC_VDD_35_36:
757 if (host->ios.clock <= 26000000)
758 pwrclass_val = card->ext_csd.raw_pwr_cl_26_360;
759 else if (host->ios.clock <= 52000000)
760 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
761 card->ext_csd.raw_pwr_cl_52_360 :
762 card->ext_csd.raw_pwr_cl_ddr_52_360;
763 else if (host->ios.clock <= 200000000)
764 pwrclass_val = card->ext_csd.raw_pwr_cl_200_360;
765 break;
766 default:
767 pr_warning("%s: Voltage range not supported "
768 "for power class.\n", mmc_hostname(host));
769 return -EINVAL;
770 }
771
772 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
773 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
774 EXT_CSD_PWR_CL_8BIT_SHIFT;
775 else
776 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
777 EXT_CSD_PWR_CL_4BIT_SHIFT;
778
779 /* If the power class is different from the default value */
780 if (pwrclass_val > 0) {
781 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
782 EXT_CSD_POWER_CLASS,
783 pwrclass_val,
784 card->ext_csd.generic_cmd6_time);
785 }
786
787 return err;
788 }
789
790 /*
791 * Selects the desired buswidth and switch to the HS200 mode
792 * if bus width set without error
793 */
794 static int mmc_select_hs200(struct mmc_card *card)
795 {
796 int idx, err = -EINVAL;
797 struct mmc_host *host;
798 static unsigned ext_csd_bits[] = {
799 EXT_CSD_BUS_WIDTH_4,
800 EXT_CSD_BUS_WIDTH_8,
801 };
802 static unsigned bus_widths[] = {
803 MMC_BUS_WIDTH_4,
804 MMC_BUS_WIDTH_8,
805 };
806
807 BUG_ON(!card);
808
809 host = card->host;
810
811 if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
812 host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
813 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
814
815 if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
816 host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
817 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
818
819 /* If fails try again during next card power cycle */
820 if (err)
821 goto err;
822
823 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
824
825 /*
826 * Unlike SD, MMC cards dont have a configuration register to notify
827 * supported bus width. So bus test command should be run to identify
828 * the supported bus width or compare the ext csd values of current
829 * bus width and ext csd values of 1 bit mode read earlier.
830 */
831 for (; idx >= 0; idx--) {
832
833 /*
834 * Host is capable of 8bit transfer, then switch
835 * the device to work in 8bit transfer mode. If the
836 * mmc switch command returns error then switch to
837 * 4bit transfer mode. On success set the corresponding
838 * bus width on the host.
839 */
840 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
841 EXT_CSD_BUS_WIDTH,
842 ext_csd_bits[idx],
843 card->ext_csd.generic_cmd6_time);
844 if (err)
845 continue;
846
847 mmc_set_bus_width(card->host, bus_widths[idx]);
848
849 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
850 err = mmc_compare_ext_csds(card, bus_widths[idx]);
851 else
852 err = mmc_bus_test(card, bus_widths[idx]);
853 if (!err)
854 break;
855 }
856
857 /* switch to HS200 mode if bus width set successfully */
858 if (!err)
859 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
860 EXT_CSD_HS_TIMING, 2, 0);
861 err:
862 return err;
863 }
864
865 /*
866 * Handle the detection and initialisation of a card.
867 *
868 * In the case of a resume, "oldcard" will contain the card
869 * we're trying to reinitialise.
870 */
871 static int mmc_init_card(struct mmc_host *host, u32 ocr,
872 struct mmc_card *oldcard)
873 {
874 struct mmc_card *card;
875 int err, ddr = 0;
876 u32 cid[4];
877 unsigned int max_dtr;
878 u32 rocr;
879 u8 *ext_csd = NULL;
880
881 BUG_ON(!host);
882 WARN_ON(!host->claimed);
883
884 /* Set correct bus mode for MMC before attempting init */
885 if (!mmc_host_is_spi(host))
886 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
887
888 /*
889 * Since we're changing the OCR value, we seem to
890 * need to tell some cards to go back to the idle
891 * state. We wait 1ms to give cards time to
892 * respond.
893 * mmc_go_idle is needed for eMMC that are asleep
894 */
895 mmc_go_idle(host);
896
897 /* The extra bit indicates that we support high capacity */
898 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
899 if (err)
900 goto err;
901
902 /*
903 * For SPI, enable CRC as appropriate.
904 */
905 if (mmc_host_is_spi(host)) {
906 err = mmc_spi_set_crc(host, use_spi_crc);
907 if (err)
908 goto err;
909 }
910
911 /*
912 * Fetch CID from card.
913 */
914 if (mmc_host_is_spi(host))
915 err = mmc_send_cid(host, cid);
916 else
917 err = mmc_all_send_cid(host, cid);
918 if (err)
919 goto err;
920
921 if (oldcard) {
922 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
923 err = -ENOENT;
924 goto err;
925 }
926
927 card = oldcard;
928 } else {
929 /*
930 * Allocate card structure.
931 */
932 card = mmc_alloc_card(host, &mmc_type);
933 if (IS_ERR(card)) {
934 err = PTR_ERR(card);
935 goto err;
936 }
937
938 card->ocr = ocr;
939 card->type = MMC_TYPE_MMC;
940 card->rca = 1;
941 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
942 }
943
944 /*
945 * For native busses: set card RCA and quit open drain mode.
946 */
947 if (!mmc_host_is_spi(host)) {
948 err = mmc_set_relative_addr(card);
949 if (err)
950 goto free_card;
951
952 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
953 }
954
955 if (!oldcard) {
956 /*
957 * Fetch CSD from card.
958 */
959 err = mmc_send_csd(card, card->raw_csd);
960 if (err)
961 goto free_card;
962
963 err = mmc_decode_csd(card);
964 if (err)
965 goto free_card;
966 err = mmc_decode_cid(card);
967 if (err)
968 goto free_card;
969 }
970
971 /*
972 * Select card, as all following commands rely on that.
973 */
974 if (!mmc_host_is_spi(host)) {
975 err = mmc_select_card(card);
976 if (err)
977 goto free_card;
978 }
979
980 if (!oldcard) {
981 /*
982 * Fetch and process extended CSD.
983 */
984
985 err = mmc_get_ext_csd(card, &ext_csd);
986 if (err)
987 goto free_card;
988 err = mmc_read_ext_csd(card, ext_csd);
989 if (err)
990 goto free_card;
991
992 /* If doing byte addressing, check if required to do sector
993 * addressing. Handle the case of <2GB cards needing sector
994 * addressing. See section 8.1 JEDEC Standard JED84-A441;
995 * ocr register has bit 30 set for sector addressing.
996 */
997 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
998 mmc_card_set_blockaddr(card);
999
1000 /* Erase size depends on CSD and Extended CSD */
1001 mmc_set_erase_size(card);
1002 }
1003
1004 /*
1005 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1006 * bit. This bit will be lost every time after a reset or power off.
1007 */
1008 if (card->ext_csd.enhanced_area_en ||
1009 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1010 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1011 EXT_CSD_ERASE_GROUP_DEF, 1,
1012 card->ext_csd.generic_cmd6_time);
1013
1014 if (err && err != -EBADMSG)
1015 goto free_card;
1016
1017 if (err) {
1018 err = 0;
1019 /*
1020 * Just disable enhanced area off & sz
1021 * will try to enable ERASE_GROUP_DEF
1022 * during next time reinit
1023 */
1024 card->ext_csd.enhanced_area_offset = -EINVAL;
1025 card->ext_csd.enhanced_area_size = -EINVAL;
1026 } else {
1027 card->ext_csd.erase_group_def = 1;
1028 /*
1029 * enable ERASE_GRP_DEF successfully.
1030 * This will affect the erase size, so
1031 * here need to reset erase size
1032 */
1033 mmc_set_erase_size(card);
1034 }
1035 }
1036
1037 /*
1038 * Ensure eMMC user default partition is enabled
1039 */
1040 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1041 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1042 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1043 card->ext_csd.part_config,
1044 card->ext_csd.part_time);
1045 if (err && err != -EBADMSG)
1046 goto free_card;
1047 }
1048
1049 /*
1050 * Enable power_off_notification byte in the ext_csd register
1051 */
1052 if (card->ext_csd.rev >= 6) {
1053 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1054 EXT_CSD_POWER_OFF_NOTIFICATION,
1055 EXT_CSD_POWER_ON,
1056 card->ext_csd.generic_cmd6_time);
1057 if (err && err != -EBADMSG)
1058 goto free_card;
1059
1060 /*
1061 * The err can be -EBADMSG or 0,
1062 * so check for success and update the flag
1063 */
1064 if (!err)
1065 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1066 }
1067
1068 /*
1069 * Activate high speed (if supported)
1070 */
1071 if (card->ext_csd.hs_max_dtr != 0) {
1072 err = 0;
1073 if (card->ext_csd.hs_max_dtr > 52000000 &&
1074 host->caps2 & MMC_CAP2_HS200)
1075 err = mmc_select_hs200(card);
1076 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1077 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1078 EXT_CSD_HS_TIMING, 1,
1079 card->ext_csd.generic_cmd6_time);
1080
1081 if (err && err != -EBADMSG)
1082 goto free_card;
1083
1084 if (err) {
1085 pr_warning("%s: switch to highspeed failed\n",
1086 mmc_hostname(card->host));
1087 err = 0;
1088 } else {
1089 if (card->ext_csd.hs_max_dtr > 52000000 &&
1090 host->caps2 & MMC_CAP2_HS200) {
1091 mmc_card_set_hs200(card);
1092 mmc_set_timing(card->host,
1093 MMC_TIMING_MMC_HS200);
1094 } else {
1095 mmc_card_set_highspeed(card);
1096 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1097 }
1098 }
1099 }
1100
1101 /*
1102 * Compute bus speed.
1103 */
1104 max_dtr = (unsigned int)-1;
1105
1106 if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1107 if (max_dtr > card->ext_csd.hs_max_dtr)
1108 max_dtr = card->ext_csd.hs_max_dtr;
1109 if (mmc_card_highspeed(card) && (max_dtr > 52000000))
1110 max_dtr = 52000000;
1111 } else if (max_dtr > card->csd.max_dtr) {
1112 max_dtr = card->csd.max_dtr;
1113 }
1114
1115 mmc_set_clock(host, max_dtr);
1116
1117 /*
1118 * Indicate DDR mode (if supported).
1119 */
1120 if (mmc_card_highspeed(card)) {
1121 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1122 && (host->caps & MMC_CAP_1_8V_DDR))
1123 ddr = MMC_1_8V_DDR_MODE;
1124 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1125 && (host->caps & MMC_CAP_1_2V_DDR))
1126 ddr = MMC_1_2V_DDR_MODE;
1127 }
1128
1129 /*
1130 * Indicate HS200 SDR mode (if supported).
1131 */
1132 if (mmc_card_hs200(card)) {
1133 u32 ext_csd_bits;
1134 u32 bus_width = card->host->ios.bus_width;
1135
1136 /*
1137 * For devices supporting HS200 mode, the bus width has
1138 * to be set before executing the tuning function. If
1139 * set before tuning, then device will respond with CRC
1140 * errors for responses on CMD line. So for HS200 the
1141 * sequence will be
1142 * 1. set bus width 4bit / 8 bit (1 bit not supported)
1143 * 2. switch to HS200 mode
1144 * 3. set the clock to > 52Mhz <=200MHz and
1145 * 4. execute tuning for HS200
1146 */
1147 if ((host->caps2 & MMC_CAP2_HS200) &&
1148 card->host->ops->execute_tuning) {
1149 mmc_host_clk_hold(card->host);
1150 err = card->host->ops->execute_tuning(card->host,
1151 MMC_SEND_TUNING_BLOCK_HS200);
1152 mmc_host_clk_release(card->host);
1153 }
1154 if (err) {
1155 pr_warning("%s: tuning execution failed\n",
1156 mmc_hostname(card->host));
1157 goto err;
1158 }
1159
1160 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1161 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1162 err = mmc_select_powerclass(card, ext_csd_bits);
1163 if (err)
1164 pr_warning("%s: power class selection to bus width %d"
1165 " failed\n", mmc_hostname(card->host),
1166 1 << bus_width);
1167 }
1168
1169 /*
1170 * Activate wide bus and DDR (if supported).
1171 */
1172 if (!mmc_card_hs200(card) &&
1173 (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1174 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1175 static unsigned ext_csd_bits[][2] = {
1176 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1177 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1178 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1179 };
1180 static unsigned bus_widths[] = {
1181 MMC_BUS_WIDTH_8,
1182 MMC_BUS_WIDTH_4,
1183 MMC_BUS_WIDTH_1
1184 };
1185 unsigned idx, bus_width = 0;
1186
1187 if (host->caps & MMC_CAP_8_BIT_DATA)
1188 idx = 0;
1189 else
1190 idx = 1;
1191 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1192 bus_width = bus_widths[idx];
1193 if (bus_width == MMC_BUS_WIDTH_1)
1194 ddr = 0; /* no DDR for 1-bit width */
1195 err = mmc_select_powerclass(card, ext_csd_bits[idx][0]);
1196 if (err)
1197 pr_warning("%s: power class selection to "
1198 "bus width %d failed\n",
1199 mmc_hostname(card->host),
1200 1 << bus_width);
1201
1202 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1203 EXT_CSD_BUS_WIDTH,
1204 ext_csd_bits[idx][0],
1205 card->ext_csd.generic_cmd6_time);
1206 if (!err) {
1207 mmc_set_bus_width(card->host, bus_width);
1208
1209 /*
1210 * If controller can't handle bus width test,
1211 * compare ext_csd previously read in 1 bit mode
1212 * against ext_csd at new bus width
1213 */
1214 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1215 err = mmc_compare_ext_csds(card,
1216 bus_width);
1217 else
1218 err = mmc_bus_test(card, bus_width);
1219 if (!err)
1220 break;
1221 }
1222 }
1223
1224 if (!err && ddr) {
1225 err = mmc_select_powerclass(card, ext_csd_bits[idx][1]);
1226 if (err)
1227 pr_warning("%s: power class selection to "
1228 "bus width %d ddr %d failed\n",
1229 mmc_hostname(card->host),
1230 1 << bus_width, ddr);
1231
1232 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1233 EXT_CSD_BUS_WIDTH,
1234 ext_csd_bits[idx][1],
1235 card->ext_csd.generic_cmd6_time);
1236 }
1237 if (err) {
1238 pr_warning("%s: switch to bus width %d ddr %d "
1239 "failed\n", mmc_hostname(card->host),
1240 1 << bus_width, ddr);
1241 goto free_card;
1242 } else if (ddr) {
1243 /*
1244 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1245 * signaling.
1246 *
1247 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1248 *
1249 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1250 * in the JEDEC spec for DDR.
1251 *
1252 * Do not force change in vccq since we are obviously
1253 * working and no change to vccq is needed.
1254 *
1255 * WARNING: eMMC rules are NOT the same as SD DDR
1256 */
1257 if (ddr == MMC_1_2V_DDR_MODE) {
1258 err = __mmc_set_signal_voltage(host,
1259 MMC_SIGNAL_VOLTAGE_120);
1260 if (err)
1261 goto err;
1262 }
1263 mmc_card_set_ddr_mode(card);
1264 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1265 mmc_set_bus_width(card->host, bus_width);
1266 }
1267 }
1268
1269 /*
1270 * Enable HPI feature (if supported)
1271 */
1272 if (card->ext_csd.hpi) {
1273 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1274 EXT_CSD_HPI_MGMT, 1,
1275 card->ext_csd.generic_cmd6_time);
1276 if (err && err != -EBADMSG)
1277 goto free_card;
1278 if (err) {
1279 pr_warning("%s: Enabling HPI failed\n",
1280 mmc_hostname(card->host));
1281 err = 0;
1282 } else
1283 card->ext_csd.hpi_en = 1;
1284 }
1285
1286 /*
1287 * If cache size is higher than 0, this indicates
1288 * the existence of cache and it can be turned on.
1289 */
1290 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1291 card->ext_csd.cache_size > 0) {
1292 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1293 EXT_CSD_CACHE_CTRL, 1,
1294 card->ext_csd.generic_cmd6_time);
1295 if (err && err != -EBADMSG)
1296 goto free_card;
1297
1298 /*
1299 * Only if no error, cache is turned on successfully.
1300 */
1301 if (err) {
1302 pr_warning("%s: Cache is supported, "
1303 "but failed to turn on (%d)\n",
1304 mmc_hostname(card->host), err);
1305 card->ext_csd.cache_ctrl = 0;
1306 err = 0;
1307 } else {
1308 card->ext_csd.cache_ctrl = 1;
1309 }
1310 }
1311
1312 /*
1313 * The mandatory minimum values are defined for packed command.
1314 * read: 5, write: 3
1315 */
1316 if (card->ext_csd.max_packed_writes >= 3 &&
1317 card->ext_csd.max_packed_reads >= 5 &&
1318 host->caps2 & MMC_CAP2_PACKED_CMD) {
1319 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1320 EXT_CSD_EXP_EVENTS_CTRL,
1321 EXT_CSD_PACKED_EVENT_EN,
1322 card->ext_csd.generic_cmd6_time);
1323 if (err && err != -EBADMSG)
1324 goto free_card;
1325 if (err) {
1326 pr_warn("%s: Enabling packed event failed\n",
1327 mmc_hostname(card->host));
1328 card->ext_csd.packed_event_en = 0;
1329 err = 0;
1330 } else {
1331 card->ext_csd.packed_event_en = 1;
1332 }
1333 }
1334
1335 if (!oldcard)
1336 host->card = card;
1337
1338 mmc_free_ext_csd(ext_csd);
1339 return 0;
1340
1341 free_card:
1342 if (!oldcard)
1343 mmc_remove_card(card);
1344 err:
1345 mmc_free_ext_csd(ext_csd);
1346
1347 return err;
1348 }
1349
1350 static int mmc_can_sleep(struct mmc_card *card)
1351 {
1352 return (card && card->ext_csd.rev >= 3);
1353 }
1354
1355 static int mmc_sleep(struct mmc_host *host)
1356 {
1357 struct mmc_command cmd = {0};
1358 struct mmc_card *card = host->card;
1359 int err;
1360
1361 if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
1362 return 0;
1363
1364 err = mmc_deselect_cards(host);
1365 if (err)
1366 return err;
1367
1368 cmd.opcode = MMC_SLEEP_AWAKE;
1369 cmd.arg = card->rca << 16;
1370 cmd.arg |= 1 << 15;
1371
1372 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1373 err = mmc_wait_for_cmd(host, &cmd, 0);
1374 if (err)
1375 return err;
1376
1377 /*
1378 * If the host does not wait while the card signals busy, then we will
1379 * will have to wait the sleep/awake timeout. Note, we cannot use the
1380 * SEND_STATUS command to poll the status because that command (and most
1381 * others) is invalid while the card sleeps.
1382 */
1383 if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1384 mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000));
1385
1386 return err;
1387 }
1388
1389 static int mmc_can_poweroff_notify(const struct mmc_card *card)
1390 {
1391 return card &&
1392 mmc_card_mmc(card) &&
1393 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1394 }
1395
1396 static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1397 {
1398 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1399 int err;
1400
1401 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1402 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1403 timeout = card->ext_csd.power_off_longtime;
1404
1405 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1406 EXT_CSD_POWER_OFF_NOTIFICATION,
1407 notify_type, timeout, true, false);
1408 if (err)
1409 pr_err("%s: Power Off Notification timed out, %u\n",
1410 mmc_hostname(card->host), timeout);
1411
1412 /* Disable the power off notification after the switch operation. */
1413 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1414
1415 return err;
1416 }
1417
1418 /*
1419 * Host is being removed. Free up the current card.
1420 */
1421 static void mmc_remove(struct mmc_host *host)
1422 {
1423 BUG_ON(!host);
1424 BUG_ON(!host->card);
1425
1426 mmc_remove_card(host->card);
1427 host->card = NULL;
1428 }
1429
1430 /*
1431 * Card detection - card is alive.
1432 */
1433 static int mmc_alive(struct mmc_host *host)
1434 {
1435 return mmc_send_status(host->card, NULL);
1436 }
1437
1438 /*
1439 * Card detection callback from host.
1440 */
1441 static void mmc_detect(struct mmc_host *host)
1442 {
1443 int err;
1444
1445 BUG_ON(!host);
1446 BUG_ON(!host->card);
1447
1448 mmc_get_card(host->card);
1449
1450 /*
1451 * Just check if our card has been removed.
1452 */
1453 err = _mmc_detect_card_removed(host);
1454
1455 mmc_put_card(host->card);
1456
1457 if (err) {
1458 mmc_remove(host);
1459
1460 mmc_claim_host(host);
1461 mmc_detach_bus(host);
1462 mmc_power_off(host);
1463 mmc_release_host(host);
1464 }
1465 }
1466
1467 static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1468 {
1469 int err = 0;
1470 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1471 EXT_CSD_POWER_OFF_LONG;
1472
1473 BUG_ON(!host);
1474 BUG_ON(!host->card);
1475
1476 mmc_claim_host(host);
1477
1478 if (mmc_card_suspended(host->card))
1479 goto out;
1480
1481 if (mmc_card_doing_bkops(host->card)) {
1482 err = mmc_stop_bkops(host->card);
1483 if (err)
1484 goto out;
1485 }
1486
1487 err = mmc_cache_ctrl(host, 0);
1488 if (err)
1489 goto out;
1490
1491 if (mmc_can_poweroff_notify(host->card) &&
1492 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1493 err = mmc_poweroff_notify(host->card, notify_type);
1494 else if (mmc_can_sleep(host->card))
1495 err = mmc_sleep(host);
1496 else if (!mmc_host_is_spi(host))
1497 err = mmc_deselect_cards(host);
1498 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1499
1500 if (!err) {
1501 mmc_power_off(host);
1502 mmc_card_set_suspended(host->card);
1503 }
1504 out:
1505 mmc_release_host(host);
1506 return err;
1507 }
1508
1509 /*
1510 * Suspend callback
1511 */
1512 static int mmc_suspend(struct mmc_host *host)
1513 {
1514 int err;
1515
1516 err = _mmc_suspend(host, true);
1517 if (!err) {
1518 pm_runtime_disable(&host->card->dev);
1519 pm_runtime_set_suspended(&host->card->dev);
1520 }
1521
1522 return err;
1523 }
1524
1525 /*
1526 * This function tries to determine if the same card is still present
1527 * and, if so, restore all state to it.
1528 */
1529 static int _mmc_resume(struct mmc_host *host)
1530 {
1531 int err = 0;
1532
1533 BUG_ON(!host);
1534 BUG_ON(!host->card);
1535
1536 mmc_claim_host(host);
1537
1538 if (!mmc_card_suspended(host->card))
1539 goto out;
1540
1541 mmc_power_up(host, host->card->ocr);
1542 err = mmc_init_card(host, host->card->ocr, host->card);
1543 mmc_card_clr_suspended(host->card);
1544
1545 out:
1546 mmc_release_host(host);
1547 return err;
1548 }
1549
1550 /*
1551 * Shutdown callback
1552 */
1553 static int mmc_shutdown(struct mmc_host *host)
1554 {
1555 int err = 0;
1556
1557 /*
1558 * In a specific case for poweroff notify, we need to resume the card
1559 * before we can shutdown it properly.
1560 */
1561 if (mmc_can_poweroff_notify(host->card) &&
1562 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1563 err = _mmc_resume(host);
1564
1565 if (!err)
1566 err = _mmc_suspend(host, false);
1567
1568 return err;
1569 }
1570
1571 /*
1572 * Callback for resume.
1573 */
1574 static int mmc_resume(struct mmc_host *host)
1575 {
1576 int err = 0;
1577
1578 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1579 err = _mmc_resume(host);
1580 pm_runtime_set_active(&host->card->dev);
1581 pm_runtime_mark_last_busy(&host->card->dev);
1582 }
1583 pm_runtime_enable(&host->card->dev);
1584
1585 return err;
1586 }
1587
1588 /*
1589 * Callback for runtime_suspend.
1590 */
1591 static int mmc_runtime_suspend(struct mmc_host *host)
1592 {
1593 int err;
1594
1595 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1596 return 0;
1597
1598 err = _mmc_suspend(host, true);
1599 if (err)
1600 pr_err("%s: error %d doing aggessive suspend\n",
1601 mmc_hostname(host), err);
1602
1603 return err;
1604 }
1605
1606 /*
1607 * Callback for runtime_resume.
1608 */
1609 static int mmc_runtime_resume(struct mmc_host *host)
1610 {
1611 int err;
1612
1613 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1614 return 0;
1615
1616 err = _mmc_resume(host);
1617 if (err)
1618 pr_err("%s: error %d doing aggessive resume\n",
1619 mmc_hostname(host), err);
1620
1621 return 0;
1622 }
1623
1624 static int mmc_power_restore(struct mmc_host *host)
1625 {
1626 int ret;
1627
1628 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1629 mmc_claim_host(host);
1630 ret = mmc_init_card(host, host->card->ocr, host->card);
1631 mmc_release_host(host);
1632
1633 return ret;
1634 }
1635
1636 static const struct mmc_bus_ops mmc_ops = {
1637 .remove = mmc_remove,
1638 .detect = mmc_detect,
1639 .suspend = NULL,
1640 .resume = NULL,
1641 .power_restore = mmc_power_restore,
1642 .alive = mmc_alive,
1643 .shutdown = mmc_shutdown,
1644 };
1645
1646 static const struct mmc_bus_ops mmc_ops_unsafe = {
1647 .remove = mmc_remove,
1648 .detect = mmc_detect,
1649 .suspend = mmc_suspend,
1650 .resume = mmc_resume,
1651 .runtime_suspend = mmc_runtime_suspend,
1652 .runtime_resume = mmc_runtime_resume,
1653 .power_restore = mmc_power_restore,
1654 .alive = mmc_alive,
1655 .shutdown = mmc_shutdown,
1656 };
1657
1658 static void mmc_attach_bus_ops(struct mmc_host *host)
1659 {
1660 const struct mmc_bus_ops *bus_ops;
1661
1662 if (!mmc_card_is_removable(host))
1663 bus_ops = &mmc_ops_unsafe;
1664 else
1665 bus_ops = &mmc_ops;
1666 mmc_attach_bus(host, bus_ops);
1667 }
1668
1669 /*
1670 * Starting point for MMC card init.
1671 */
1672 int mmc_attach_mmc(struct mmc_host *host)
1673 {
1674 int err;
1675 u32 ocr, rocr;
1676
1677 BUG_ON(!host);
1678 WARN_ON(!host->claimed);
1679
1680 /* Set correct bus mode for MMC before attempting attach */
1681 if (!mmc_host_is_spi(host))
1682 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1683
1684 err = mmc_send_op_cond(host, 0, &ocr);
1685 if (err)
1686 return err;
1687
1688 mmc_attach_bus_ops(host);
1689 if (host->ocr_avail_mmc)
1690 host->ocr_avail = host->ocr_avail_mmc;
1691
1692 /*
1693 * We need to get OCR a different way for SPI.
1694 */
1695 if (mmc_host_is_spi(host)) {
1696 err = mmc_spi_read_ocr(host, 1, &ocr);
1697 if (err)
1698 goto err;
1699 }
1700
1701 rocr = mmc_select_voltage(host, ocr);
1702
1703 /*
1704 * Can we support the voltage of the card?
1705 */
1706 if (!rocr) {
1707 err = -EINVAL;
1708 goto err;
1709 }
1710
1711 /*
1712 * Detect and init the card.
1713 */
1714 err = mmc_init_card(host, rocr, NULL);
1715 if (err)
1716 goto err;
1717
1718 mmc_release_host(host);
1719 err = mmc_add_card(host->card);
1720 mmc_claim_host(host);
1721 if (err)
1722 goto remove_card;
1723
1724 return 0;
1725
1726 remove_card:
1727 mmc_release_host(host);
1728 mmc_remove_card(host->card);
1729 mmc_claim_host(host);
1730 host->card = NULL;
1731 err:
1732 mmc_detach_bus(host);
1733
1734 pr_err("%s: error %d whilst initialising MMC card\n",
1735 mmc_hostname(host), err);
1736
1737 return err;
1738 }
Linux with added FPC-III support