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usb: gadget: f_mtp: Avoid race between mtp_read and mtp_function_disable
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / mmc / core / mmc.c
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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
29static const unsigned int tran_exp[] = {
30 10000, 100000, 1000000, 10000000,
31 0, 0, 0, 0
32};
33
34static 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
39static const unsigned int tacc_exp[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
41};
42
43static 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 */
65static 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
117static 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 */
130static 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
182static 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
243static 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
292static 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/* Minimum partition switch timeout in milliseconds */
337#define MMC_MIN_PART_SWITCH_TIME 300
338
339/*
340 * Decode extended CSD.
341 */
342static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
343{
344 int err = 0, idx;
345 unsigned int part_size;
346 struct device_node *np;
347 bool broken_hpi = false;
348
349 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
350 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
351 if (card->csd.structure == 3) {
352 if (card->ext_csd.raw_ext_csd_structure > 2) {
353 pr_err("%s: unrecognised EXT_CSD structure "
354 "version %d\n", mmc_hostname(card->host),
355 card->ext_csd.raw_ext_csd_structure);
356 err = -EINVAL;
357 goto out;
358 }
359 }
360
361 np = mmc_of_find_child_device(card->host, 0);
362 if (np && of_device_is_compatible(np, "mmc-card"))
363 broken_hpi = of_property_read_bool(np, "broken-hpi");
364 of_node_put(np);
365
366 /*
367 * The EXT_CSD format is meant to be forward compatible. As long
368 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
369 * are authorized, see JEDEC JESD84-B50 section B.8.
370 */
371 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
372
373 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
374 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
375 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
376 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
377 if (card->ext_csd.rev >= 2) {
378 card->ext_csd.sectors =
379 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
380 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
381 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
382 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
383
384 /* Cards with density > 2GiB are sector addressed */
385 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
386 mmc_card_set_blockaddr(card);
387 }
388
389 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
390 mmc_select_card_type(card);
391
392 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
393 card->ext_csd.raw_erase_timeout_mult =
394 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
395 card->ext_csd.raw_hc_erase_grp_size =
396 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
397 if (card->ext_csd.rev >= 3) {
398 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
399 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
400
401 /* EXT_CSD value is in units of 10ms, but we store in ms */
402 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
403 /* Some eMMC set the value too low so set a minimum */
404 if (card->ext_csd.part_time &&
405 card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
406 card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
407
408 /* Sleep / awake timeout in 100ns units */
409 if (sa_shift > 0 && sa_shift <= 0x17)
410 card->ext_csd.sa_timeout =
411 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
412 card->ext_csd.erase_group_def =
413 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
414 card->ext_csd.hc_erase_timeout = 300 *
415 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
416 card->ext_csd.hc_erase_size =
417 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
418
419 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
420
421 /*
422 * There are two boot regions of equal size, defined in
423 * multiples of 128K.
424 */
425 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
426 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
427 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
428 mmc_part_add(card, part_size,
429 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
430 "boot%d", idx, true,
431 MMC_BLK_DATA_AREA_BOOT);
432 }
433 }
434 }
435
436 card->ext_csd.raw_hc_erase_gap_size =
437 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
438 card->ext_csd.raw_sec_trim_mult =
439 ext_csd[EXT_CSD_SEC_TRIM_MULT];
440 card->ext_csd.raw_sec_erase_mult =
441 ext_csd[EXT_CSD_SEC_ERASE_MULT];
442 card->ext_csd.raw_sec_feature_support =
443 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
444 card->ext_csd.raw_trim_mult =
445 ext_csd[EXT_CSD_TRIM_MULT];
446 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
447 card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
448 if (card->ext_csd.rev >= 4) {
449 if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
450 EXT_CSD_PART_SETTING_COMPLETED)
451 card->ext_csd.partition_setting_completed = 1;
452 else
453 card->ext_csd.partition_setting_completed = 0;
454
455 mmc_manage_enhanced_area(card, ext_csd);
456
457 mmc_manage_gp_partitions(card, ext_csd);
458
459 card->ext_csd.sec_trim_mult =
460 ext_csd[EXT_CSD_SEC_TRIM_MULT];
461 card->ext_csd.sec_erase_mult =
462 ext_csd[EXT_CSD_SEC_ERASE_MULT];
463 card->ext_csd.sec_feature_support =
464 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
465 card->ext_csd.trim_timeout = 300 *
466 ext_csd[EXT_CSD_TRIM_MULT];
467
468 /*
469 * Note that the call to mmc_part_add above defaults to read
470 * only. If this default assumption is changed, the call must
471 * take into account the value of boot_locked below.
472 */
473 card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
474 card->ext_csd.boot_ro_lockable = true;
475
476 /* Save power class values */
477 card->ext_csd.raw_pwr_cl_52_195 =
478 ext_csd[EXT_CSD_PWR_CL_52_195];
479 card->ext_csd.raw_pwr_cl_26_195 =
480 ext_csd[EXT_CSD_PWR_CL_26_195];
481 card->ext_csd.raw_pwr_cl_52_360 =
482 ext_csd[EXT_CSD_PWR_CL_52_360];
483 card->ext_csd.raw_pwr_cl_26_360 =
484 ext_csd[EXT_CSD_PWR_CL_26_360];
485 card->ext_csd.raw_pwr_cl_200_195 =
486 ext_csd[EXT_CSD_PWR_CL_200_195];
487 card->ext_csd.raw_pwr_cl_200_360 =
488 ext_csd[EXT_CSD_PWR_CL_200_360];
489 card->ext_csd.raw_pwr_cl_ddr_52_195 =
490 ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
491 card->ext_csd.raw_pwr_cl_ddr_52_360 =
492 ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
493 card->ext_csd.raw_pwr_cl_ddr_200_360 =
494 ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
495 }
496
497 if (card->ext_csd.rev >= 5) {
498 /* Adjust production date as per JEDEC JESD84-B451 */
499 if (card->cid.year < 2010)
500 card->cid.year += 16;
501
502 /* check whether the eMMC card supports BKOPS */
503 if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
504 card->ext_csd.bkops = 1;
505 card->ext_csd.man_bkops_en =
506 (ext_csd[EXT_CSD_BKOPS_EN] &
507 EXT_CSD_MANUAL_BKOPS_MASK);
508 card->ext_csd.raw_bkops_status =
509 ext_csd[EXT_CSD_BKOPS_STATUS];
510 if (!card->ext_csd.man_bkops_en)
511 pr_info("%s: MAN_BKOPS_EN bit is not set\n",
512 mmc_hostname(card->host));
513 }
514
515 /* check whether the eMMC card supports HPI */
516 if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
517 card->ext_csd.hpi = 1;
518 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
519 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
520 else
521 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
522 /*
523 * Indicate the maximum timeout to close
524 * a command interrupted by HPI
525 */
526 card->ext_csd.out_of_int_time =
527 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
528 }
529
530 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
531 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
532
533 /*
534 * RPMB regions are defined in multiples of 128K.
535 */
536 card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
537 if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
538 mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
539 EXT_CSD_PART_CONFIG_ACC_RPMB,
540 "rpmb", 0, false,
541 MMC_BLK_DATA_AREA_RPMB);
542 }
543 }
544
545 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
546 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
547 card->erased_byte = 0xFF;
548 else
549 card->erased_byte = 0x0;
550
551 /* eMMC v4.5 or later */
552 if (card->ext_csd.rev >= 6) {
553 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
554
555 card->ext_csd.generic_cmd6_time = 10 *
556 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
557 card->ext_csd.power_off_longtime = 10 *
558 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
559
560 card->ext_csd.cache_size =
561 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
562 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
563 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
564 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
565
566 if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
567 card->ext_csd.data_sector_size = 4096;
568 else
569 card->ext_csd.data_sector_size = 512;
570
571 if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
572 (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
573 card->ext_csd.data_tag_unit_size =
574 ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
575 (card->ext_csd.data_sector_size);
576 } else {
577 card->ext_csd.data_tag_unit_size = 0;
578 }
579
580 card->ext_csd.max_packed_writes =
581 ext_csd[EXT_CSD_MAX_PACKED_WRITES];
582 card->ext_csd.max_packed_reads =
583 ext_csd[EXT_CSD_MAX_PACKED_READS];
584 } else {
585 card->ext_csd.data_sector_size = 512;
586 }
587
588 /* eMMC v5 or later */
589 if (card->ext_csd.rev >= 7) {
590 memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
591 MMC_FIRMWARE_LEN);
592 card->ext_csd.ffu_capable =
593 (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
594 !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
595 card->ext_csd.enhanced_strobe_support =
596 ext_csd[EXT_CSD_STORBE_SUPPORT];
597 card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
598 card->ext_csd.device_life_time_est_typ_a =
599 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
600 card->ext_csd.device_life_time_est_typ_b =
601 ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
602 }
603out:
604 return err;
605}
606
607static int mmc_read_ext_csd(struct mmc_card *card)
608{
609 u8 *ext_csd;
610 int err;
611
612 if (!mmc_can_ext_csd(card))
613 return 0;
614
615 err = mmc_get_ext_csd(card, &ext_csd);
616 if (err) {
617 /* If the host or the card can't do the switch,
618 * fail more gracefully. */
619 if ((err != -EINVAL)
620 && (err != -ENOSYS)
621 && (err != -EFAULT))
622 return err;
623
624 /*
625 * High capacity cards should have this "magic" size
626 * stored in their CSD.
627 */
628 if (card->csd.capacity == (4096 * 512)) {
629 pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
630 mmc_hostname(card->host));
631 } else {
632 pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
633 mmc_hostname(card->host));
634 err = 0;
635 }
636
637 return err;
638 }
639
640 err = mmc_decode_ext_csd(card, ext_csd);
641 kfree(ext_csd);
642 return err;
643}
644
645static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
646{
647 u8 *bw_ext_csd;
648 int err;
649
650 if (bus_width == MMC_BUS_WIDTH_1)
651 return 0;
652
653 err = mmc_get_ext_csd(card, &bw_ext_csd);
654 if (err)
655 return err;
656
657 /* only compare read only fields */
658 err = !((card->ext_csd.raw_partition_support ==
659 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
660 (card->ext_csd.raw_erased_mem_count ==
661 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
662 (card->ext_csd.rev ==
663 bw_ext_csd[EXT_CSD_REV]) &&
664 (card->ext_csd.raw_ext_csd_structure ==
665 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
666 (card->ext_csd.raw_card_type ==
667 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
668 (card->ext_csd.raw_s_a_timeout ==
669 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
670 (card->ext_csd.raw_hc_erase_gap_size ==
671 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
672 (card->ext_csd.raw_erase_timeout_mult ==
673 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
674 (card->ext_csd.raw_hc_erase_grp_size ==
675 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
676 (card->ext_csd.raw_sec_trim_mult ==
677 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
678 (card->ext_csd.raw_sec_erase_mult ==
679 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
680 (card->ext_csd.raw_sec_feature_support ==
681 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
682 (card->ext_csd.raw_trim_mult ==
683 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
684 (card->ext_csd.raw_sectors[0] ==
685 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
686 (card->ext_csd.raw_sectors[1] ==
687 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
688 (card->ext_csd.raw_sectors[2] ==
689 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
690 (card->ext_csd.raw_sectors[3] ==
691 bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
692 (card->ext_csd.raw_pwr_cl_52_195 ==
693 bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
694 (card->ext_csd.raw_pwr_cl_26_195 ==
695 bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
696 (card->ext_csd.raw_pwr_cl_52_360 ==
697 bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
698 (card->ext_csd.raw_pwr_cl_26_360 ==
699 bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
700 (card->ext_csd.raw_pwr_cl_200_195 ==
701 bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
702 (card->ext_csd.raw_pwr_cl_200_360 ==
703 bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
704 (card->ext_csd.raw_pwr_cl_ddr_52_195 ==
705 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
706 (card->ext_csd.raw_pwr_cl_ddr_52_360 ==
707 bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
708 (card->ext_csd.raw_pwr_cl_ddr_200_360 ==
709 bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
710
711 if (err)
712 err = -EINVAL;
713
714 kfree(bw_ext_csd);
715 return err;
716}
717
718MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
719 card->raw_cid[2], card->raw_cid[3]);
720MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
721 card->raw_csd[2], card->raw_csd[3]);
722MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
723MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
724MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
725MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
726MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
727MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
728MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
729MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
730MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
731MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
732MMC_DEV_ATTR(pre_eol_info, "%02x\n", card->ext_csd.pre_eol_info);
733MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
734 card->ext_csd.device_life_time_est_typ_a,
735 card->ext_csd.device_life_time_est_typ_b);
736MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
737MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
738 card->ext_csd.enhanced_area_offset);
739MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
740MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
741MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
742
743static ssize_t mmc_fwrev_show(struct device *dev,
744 struct device_attribute *attr,
745 char *buf)
746{
747 struct mmc_card *card = mmc_dev_to_card(dev);
748
749 if (card->ext_csd.rev < 7) {
750 return sprintf(buf, "0x%x\n", card->cid.fwrev);
751 } else {
752 return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
753 card->ext_csd.fwrev);
754 }
755}
756
757static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
758
759static struct attribute *mmc_std_attrs[] = {
760 &dev_attr_cid.attr,
761 &dev_attr_csd.attr,
762 &dev_attr_date.attr,
763 &dev_attr_erase_size.attr,
764 &dev_attr_preferred_erase_size.attr,
765 &dev_attr_fwrev.attr,
766 &dev_attr_ffu_capable.attr,
767 &dev_attr_hwrev.attr,
768 &dev_attr_manfid.attr,
769 &dev_attr_name.attr,
770 &dev_attr_oemid.attr,
771 &dev_attr_prv.attr,
772 &dev_attr_rev.attr,
773 &dev_attr_pre_eol_info.attr,
774 &dev_attr_life_time.attr,
775 &dev_attr_serial.attr,
776 &dev_attr_enhanced_area_offset.attr,
777 &dev_attr_enhanced_area_size.attr,
778 &dev_attr_raw_rpmb_size_mult.attr,
779 &dev_attr_rel_sectors.attr,
780 NULL,
781};
782ATTRIBUTE_GROUPS(mmc_std);
783
784static struct device_type mmc_type = {
785 .groups = mmc_std_groups,
786};
787
788/*
789 * Select the PowerClass for the current bus width
790 * If power class is defined for 4/8 bit bus in the
791 * extended CSD register, select it by executing the
792 * mmc_switch command.
793 */
794static int __mmc_select_powerclass(struct mmc_card *card,
795 unsigned int bus_width)
796{
797 struct mmc_host *host = card->host;
798 struct mmc_ext_csd *ext_csd = &card->ext_csd;
799 unsigned int pwrclass_val = 0;
800 int err = 0;
801
802 switch (1 << host->ios.vdd) {
803 case MMC_VDD_165_195:
804 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
805 pwrclass_val = ext_csd->raw_pwr_cl_26_195;
806 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
807 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
808 ext_csd->raw_pwr_cl_52_195 :
809 ext_csd->raw_pwr_cl_ddr_52_195;
810 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
811 pwrclass_val = ext_csd->raw_pwr_cl_200_195;
812 break;
813 case MMC_VDD_27_28:
814 case MMC_VDD_28_29:
815 case MMC_VDD_29_30:
816 case MMC_VDD_30_31:
817 case MMC_VDD_31_32:
818 case MMC_VDD_32_33:
819 case MMC_VDD_33_34:
820 case MMC_VDD_34_35:
821 case MMC_VDD_35_36:
822 if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
823 pwrclass_val = ext_csd->raw_pwr_cl_26_360;
824 else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
825 pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
826 ext_csd->raw_pwr_cl_52_360 :
827 ext_csd->raw_pwr_cl_ddr_52_360;
828 else if (host->ios.clock <= MMC_HS200_MAX_DTR)
829 pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
830 ext_csd->raw_pwr_cl_ddr_200_360 :
831 ext_csd->raw_pwr_cl_200_360;
832 break;
833 default:
834 pr_warn("%s: Voltage range not supported for power class\n",
835 mmc_hostname(host));
836 return -EINVAL;
837 }
838
839 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
840 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
841 EXT_CSD_PWR_CL_8BIT_SHIFT;
842 else
843 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
844 EXT_CSD_PWR_CL_4BIT_SHIFT;
845
846 /* If the power class is different from the default value */
847 if (pwrclass_val > 0) {
848 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
849 EXT_CSD_POWER_CLASS,
850 pwrclass_val,
851 card->ext_csd.generic_cmd6_time);
852 }
853
854 return err;
855}
856
857static int mmc_select_powerclass(struct mmc_card *card)
858{
859 struct mmc_host *host = card->host;
860 u32 bus_width, ext_csd_bits;
861 int err, ddr;
862
863 /* Power class selection is supported for versions >= 4.0 */
864 if (!mmc_can_ext_csd(card))
865 return 0;
866
867 bus_width = host->ios.bus_width;
868 /* Power class values are defined only for 4/8 bit bus */
869 if (bus_width == MMC_BUS_WIDTH_1)
870 return 0;
871
872 ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
873 if (ddr)
874 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
875 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
876 else
877 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
878 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
879
880 err = __mmc_select_powerclass(card, ext_csd_bits);
881 if (err)
882 pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
883 mmc_hostname(host), 1 << bus_width, ddr);
884
885 return err;
886}
887
888/*
889 * Set the bus speed for the selected speed mode.
890 */
891static void mmc_set_bus_speed(struct mmc_card *card)
892{
893 unsigned int max_dtr = (unsigned int)-1;
894
895 if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
896 max_dtr > card->ext_csd.hs200_max_dtr)
897 max_dtr = card->ext_csd.hs200_max_dtr;
898 else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
899 max_dtr = card->ext_csd.hs_max_dtr;
900 else if (max_dtr > card->csd.max_dtr)
901 max_dtr = card->csd.max_dtr;
902
903 mmc_set_clock(card->host, max_dtr);
904}
905
906/*
907 * Select the bus width amoung 4-bit and 8-bit(SDR).
908 * If the bus width is changed successfully, return the selected width value.
909 * Zero is returned instead of error value if the wide width is not supported.
910 */
911static int mmc_select_bus_width(struct mmc_card *card)
912{
913 static unsigned ext_csd_bits[] = {
914 EXT_CSD_BUS_WIDTH_8,
915 EXT_CSD_BUS_WIDTH_4,
916 };
917 static unsigned bus_widths[] = {
918 MMC_BUS_WIDTH_8,
919 MMC_BUS_WIDTH_4,
920 };
921 struct mmc_host *host = card->host;
922 unsigned idx, bus_width = 0;
923 int err = 0;
924
925 if (!mmc_can_ext_csd(card) ||
926 !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
927 return 0;
928
929 idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
930
931 /*
932 * Unlike SD, MMC cards dont have a configuration register to notify
933 * supported bus width. So bus test command should be run to identify
934 * the supported bus width or compare the ext csd values of current
935 * bus width and ext csd values of 1 bit mode read earlier.
936 */
937 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
938 /*
939 * Host is capable of 8bit transfer, then switch
940 * the device to work in 8bit transfer mode. If the
941 * mmc switch command returns error then switch to
942 * 4bit transfer mode. On success set the corresponding
943 * bus width on the host.
944 */
945 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
946 EXT_CSD_BUS_WIDTH,
947 ext_csd_bits[idx],
948 card->ext_csd.generic_cmd6_time);
949 if (err)
950 continue;
951
952 bus_width = bus_widths[idx];
953 mmc_set_bus_width(host, bus_width);
954
955 /*
956 * If controller can't handle bus width test,
957 * compare ext_csd previously read in 1 bit mode
958 * against ext_csd at new bus width
959 */
960 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
961 err = mmc_compare_ext_csds(card, bus_width);
962 else
963 err = mmc_bus_test(card, bus_width);
964
965 if (!err) {
966 err = bus_width;
967 break;
968 } else {
969 pr_warn("%s: switch to bus width %d failed\n",
970 mmc_hostname(host), ext_csd_bits[idx]);
971 }
972 }
973
974 return err;
975}
976
977/*
978 * Switch to the high-speed mode
979 */
980static int mmc_select_hs(struct mmc_card *card)
981{
982 int err;
983
984 if (card->en_strobe_enhanced)
985 mmc_select_bus_width(card);
986
987 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
988 EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
989 card->ext_csd.generic_cmd6_time,
990 true, true, true);
991 if (!err)
992 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
993
994 return err;
995}
996
997/*
998 * Activate wide bus and DDR if supported.
999 */
1000static int mmc_select_hs_ddr(struct mmc_card *card)
1001{
1002 struct mmc_host *host = card->host;
1003 u32 bus_width, ext_csd_bits;
1004 int err = 0;
1005
1006 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
1007 return 0;
1008
1009 bus_width = host->ios.bus_width;
1010 if (bus_width == MMC_BUS_WIDTH_1)
1011 return 0;
1012
1013 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1014 EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
1015
1016 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1017 EXT_CSD_BUS_WIDTH,
1018 ext_csd_bits,
1019 card->ext_csd.generic_cmd6_time);
1020 if (err) {
1021 pr_err("%s: switch to bus width %d ddr failed\n",
1022 mmc_hostname(host), 1 << bus_width);
1023 return err;
1024 }
1025
1026 /*
1027 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1028 * signaling.
1029 *
1030 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1031 *
1032 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1033 * in the JEDEC spec for DDR.
1034 *
1035 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
1036 * host controller can support this, like some of the SDHCI
1037 * controller which connect to an eMMC device. Some of these
1038 * host controller still needs to use 1.8v vccq for supporting
1039 * DDR mode.
1040 *
1041 * So the sequence will be:
1042 * if (host and device can both support 1.2v IO)
1043 * use 1.2v IO;
1044 * else if (host and device can both support 1.8v IO)
1045 * use 1.8v IO;
1046 * so if host and device can only support 3.3v IO, this is the
1047 * last choice.
1048 *
1049 * WARNING: eMMC rules are NOT the same as SD DDR
1050 */
1051 err = -EINVAL;
1052 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1053 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1054
1055 if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
1056 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1057
1058 /* make sure vccq is 3.3v after switching disaster */
1059 if (err)
1060 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
1061
1062 if (!err)
1063 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1064
1065 return err;
1066}
1067
1068/* Caller must hold re-tuning */
1069static int mmc_switch_status(struct mmc_card *card)
1070{
1071 u32 status;
1072 int err;
1073
1074 err = mmc_send_status(card, &status);
1075 if (err)
1076 return err;
1077
1078 return mmc_switch_status_error(card->host, status);
1079}
1080
1081static int mmc_select_hs400(struct mmc_card *card)
1082{
1083 struct mmc_host *host = card->host;
1084 u32 ext_csd_bits;
1085 bool send_status = true;
1086 unsigned int max_dtr;
1087 int err = 0;
1088 u8 val;
1089
1090 /*
1091 * HS400 mode requires 8-bit bus width
1092 */
1093 if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1094 host->ios.bus_width == MMC_BUS_WIDTH_8))
1095 return 0;
1096
1097 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1098 send_status = false;
1099
1100 if(card->en_strobe_enhanced) {
1101 ext_csd_bits = EXT_CSD_STROBE_ENHANCED_EN;
1102
1103 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1104 EXT_CSD_BUS_WIDTH,
1105 EXT_CSD_DDR_BUS_WIDTH_8 | ext_csd_bits,
1106 card->ext_csd.generic_cmd6_time);
1107 if (err) {
1108 pr_warn("%s: switch to bus width enhanced strobe failed, err:%d\n",
1109 mmc_hostname(host), err);
1110 return err;
1111 }
1112
1113 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1114 EXT_CSD_HS_TIMING,
1115 EXT_CSD_TIMING_HS400,
1116 card->ext_csd.generic_cmd6_time,
1117 true, true, true);
1118 if (err) {
1119 pr_warn("%s: switch to hs400 failed, err:%d\n",
1120 mmc_hostname(host), err);
1121 return err;
1122 }
1123 mmc_set_timing(host, MMC_TIMING_MMC_HS400_ES);
1124 } else {
1125 /*
1126 * Before switching to dual data rate operation for HS400,
1127 * it is required to convert from HS200 mode to HS mode.
1128 */
1129 /* Reduce frequency to HS frequency */
1130 max_dtr = card->ext_csd.hs_max_dtr;
1131 mmc_set_clock(host, max_dtr);
1132
1133 /* Switch card to HS mode */
1134 val = EXT_CSD_TIMING_HS;
1135 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1136 EXT_CSD_HS_TIMING, val,
1137 card->ext_csd.generic_cmd6_time,
1138 true, send_status, true);
1139 if (err) {
1140 pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
1141 mmc_hostname(host), err);
1142 return err;
1143 }
1144
1145 /* Set host controller to HS timing */
1146 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1147
1148 if (!send_status) {
1149 err = mmc_switch_status(card);
1150 if (err)
1151 goto out_err;
1152 }
1153
1154 /* Switch card to DDR */
1155 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1156 EXT_CSD_BUS_WIDTH,
1157 EXT_CSD_DDR_BUS_WIDTH_8,
1158 card->ext_csd.generic_cmd6_time);
1159 if (err) {
1160 pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
1161 mmc_hostname(host), err);
1162 return err;
1163 }
1164
1165 /* Switch card to HS400 */
1166 val = EXT_CSD_TIMING_HS400 |
1167 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1168 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1169 EXT_CSD_HS_TIMING, val,
1170 card->ext_csd.generic_cmd6_time,
1171 true, send_status, true);
1172 if (err) {
1173 pr_err("%s: switch to hs400 failed, err:%d\n",
1174 mmc_hostname(host), err);
1175 return err;
1176 }
1177
1178 /* Set host controller to HS400 timing and frequency */
1179 mmc_set_timing(host, MMC_TIMING_MMC_HS400);
1180 }
1181 mmc_set_bus_speed(card);
1182
1183 if (!send_status) {
1184 err = mmc_switch_status(card);
1185 if (err)
1186 goto out_err;
1187 }
1188
1189 return 0;
1190
1191out_err:
1192 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1193 __func__, err);
1194 return err;
1195}
1196
1197int mmc_hs200_to_hs400(struct mmc_card *card)
1198{
1199 return mmc_select_hs400(card);
1200}
1201
1202int mmc_hs400_to_hs200(struct mmc_card *card)
1203{
1204 struct mmc_host *host = card->host;
1205 bool send_status = true;
1206 unsigned int max_dtr;
1207 int err;
1208 u8 val;
1209
1210 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1211 send_status = false;
1212
1213 /* Reduce frequency to HS */
1214 max_dtr = card->ext_csd.hs_max_dtr;
1215 mmc_set_clock(host, max_dtr);
1216
1217 /* Switch HS400 to HS DDR */
1218 val = EXT_CSD_TIMING_HS;
1219 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1220 val, card->ext_csd.generic_cmd6_time,
1221 true, send_status, true);
1222 if (err)
1223 goto out_err;
1224
1225 mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
1226
1227 if (!send_status) {
1228 err = mmc_switch_status(card);
1229 if (err)
1230 goto out_err;
1231 }
1232
1233 /* Switch HS DDR to HS */
1234 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
1235 EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
1236 true, send_status, true);
1237 if (err)
1238 goto out_err;
1239
1240 mmc_set_timing(host, MMC_TIMING_MMC_HS);
1241
1242 if (!send_status) {
1243 err = mmc_switch_status(card);
1244 if (err)
1245 goto out_err;
1246 }
1247
1248 /* Switch HS to HS200 */
1249 val = EXT_CSD_TIMING_HS200 |
1250 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1251 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
1252 val, card->ext_csd.generic_cmd6_time, true,
1253 send_status, true);
1254 if (err)
1255 goto out_err;
1256
1257 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1258
1259 if (!send_status) {
1260 err = mmc_switch_status(card);
1261 if (err)
1262 goto out_err;
1263 }
1264
1265 mmc_set_bus_speed(card);
1266
1267 return 0;
1268
1269out_err:
1270 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1271 __func__, err);
1272 return err;
1273}
1274
1275static void mmc_select_driver_type(struct mmc_card *card)
1276{
1277 int card_drv_type, drive_strength, drv_type;
1278
1279 card_drv_type = card->ext_csd.raw_driver_strength |
1280 mmc_driver_type_mask(0);
1281
1282 drive_strength = mmc_select_drive_strength(card,
1283 card->ext_csd.hs200_max_dtr,
1284 card_drv_type, &drv_type);
1285
1286 card->drive_strength = drive_strength;
1287
1288 if (drv_type)
1289 mmc_set_driver_type(card->host, drv_type);
1290}
1291
1292/*
1293 * For device supporting HS200 mode, the following sequence
1294 * should be done before executing the tuning process.
1295 * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
1296 * 2. switch to HS200 mode
1297 * 3. set the clock to > 52Mhz and <=200MHz
1298 */
1299static int mmc_select_hs200(struct mmc_card *card)
1300{
1301 struct mmc_host *host = card->host;
1302 bool send_status = true;
1303 unsigned int old_timing;
1304 int err = -EINVAL;
1305 u8 val;
1306
1307 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
1308 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
1309
1310 if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
1311 err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
1312
1313 /* If fails try again during next card power cycle */
1314 if (err)
1315 goto err;
1316
1317 mmc_select_driver_type(card);
1318
1319 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
1320 send_status = false;
1321
1322 /*
1323 * Set the bus width(4 or 8) with host's support and
1324 * switch to HS200 mode if bus width is set successfully.
1325 */
1326 err = mmc_select_bus_width(card);
1327 if (!IS_ERR_VALUE(err)) {
1328 val = EXT_CSD_TIMING_HS200 |
1329 card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
1330 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1331 EXT_CSD_HS_TIMING, val,
1332 card->ext_csd.generic_cmd6_time,
1333 true, send_status, true);
1334 if (err)
1335 goto err;
1336 old_timing = host->ios.timing;
1337 mmc_set_timing(host, MMC_TIMING_MMC_HS200);
1338 if (!send_status) {
1339 err = mmc_switch_status(card);
1340 /*
1341 * mmc_select_timing() assumes timing has not changed if
1342 * it is a switch error.
1343 */
1344 if (err == -EBADMSG)
1345 mmc_set_timing(host, old_timing);
1346 }
1347 }
1348err:
1349 if (err)
1350 pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
1351 __func__, err);
1352 return err;
1353}
1354
1355/*
1356 * Activate High Speed or HS200 mode if supported.
1357 */
1358static int mmc_select_timing(struct mmc_card *card)
1359{
1360 int err = 0;
1361
1362 if (!mmc_can_ext_csd(card))
1363 goto bus_speed;
1364
1365 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
1366 err = mmc_select_hs200(card);
1367 else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
1368 err = mmc_select_hs(card);
1369
1370 if (err && err != -EBADMSG)
1371 return err;
1372
1373 if (err) {
1374 pr_warn("%s: switch to %s failed\n",
1375 mmc_card_hs(card) ? "high-speed" :
1376 (mmc_card_hs200(card) ? "hs200" : ""),
1377 mmc_hostname(card->host));
1378 err = 0;
1379 }
1380
1381bus_speed:
1382 /*
1383 * Set the bus speed to the selected bus timing.
1384 * If timing is not selected, backward compatible is the default.
1385 */
1386 mmc_set_bus_speed(card);
1387 return err;
1388}
1389
1390/*
1391 * Execute tuning sequence to seek the proper bus operating
1392 * conditions for HS200 and HS400, which sends CMD21 to the device.
1393 */
1394static int mmc_hs200_tuning(struct mmc_card *card)
1395{
1396 struct mmc_host *host = card->host;
1397 int err = 0;
1398
1399 /*
1400 * Timing should be adjusted to the HS400 target
1401 * operation frequency for tuning process
1402 */
1403 if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
1404 host->ios.bus_width == MMC_BUS_WIDTH_8)
1405 if (host->ops->prepare_hs400_tuning && !card->en_strobe_enhanced)
1406 host->ops->prepare_hs400_tuning(host, &host->ios);
1407
1408 if (host->ops->execute_tuning && !card->en_strobe_enhanced) {
1409 err = mmc_execute_tuning(card);
1410
1411 if (err)
1412 pr_warn("%s: tuning execution failed\n",
1413 mmc_hostname(host));
1414 }
1415
1416 return err;
1417}
1418
1419/*
1420 * Handle the detection and initialisation of a card.
1421 *
1422 * In the case of a resume, "oldcard" will contain the card
1423 * we're trying to reinitialise.
1424 */
1425static int mmc_init_card(struct mmc_host *host, u32 ocr,
1426 struct mmc_card *oldcard)
1427{
1428 struct mmc_card *card;
1429 int err;
1430 u32 cid[4];
1431 u32 rocr;
1432
1433 BUG_ON(!host);
1434 WARN_ON(!host->claimed);
1435
1436 /* Set correct bus mode for MMC before attempting init */
1437 if (!mmc_host_is_spi(host))
1438 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1439
1440 /*
1441 * Since we're changing the OCR value, we seem to
1442 * need to tell some cards to go back to the idle
1443 * state. We wait 1ms to give cards time to
1444 * respond.
1445 * mmc_go_idle is needed for eMMC that are asleep
1446 */
1447 mmc_go_idle(host);
1448
1449 /* The extra bit indicates that we support high capacity */
1450 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
1451 if (err)
1452 goto err;
1453
1454 /*
1455 * For SPI, enable CRC as appropriate.
1456 */
1457 if (mmc_host_is_spi(host)) {
1458 err = mmc_spi_set_crc(host, use_spi_crc);
1459 if (err)
1460 goto err;
1461 }
1462
1463 /*
1464 * Fetch CID from card.
1465 */
1466 if (mmc_host_is_spi(host))
1467 err = mmc_send_cid(host, cid);
1468 else
1469 err = mmc_all_send_cid(host, cid);
1470 if (err)
1471 goto err;
1472
1473 if (oldcard) {
1474 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1475 err = -ENOENT;
1476 goto err;
1477 }
1478
1479 card = oldcard;
1480 } else {
1481 /*
1482 * Allocate card structure.
1483 */
1484 card = mmc_alloc_card(host, &mmc_type);
1485 if (IS_ERR(card)) {
1486 err = PTR_ERR(card);
1487 goto err;
1488 }
1489
1490 card->ocr = ocr;
1491 card->type = MMC_TYPE_MMC;
1492 card->rca = 1;
1493 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1494 }
1495
1496 /*
1497 * Call the optional HC's init_card function to handle quirks.
1498 */
1499 if (host->ops->init_card)
1500 host->ops->init_card(host, card);
1501
1502 /*
1503 * For native busses: set card RCA and quit open drain mode.
1504 */
1505 if (!mmc_host_is_spi(host)) {
1506 err = mmc_set_relative_addr(card);
1507 if (err)
1508 goto free_card;
1509
1510 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
1511 }
1512
1513 if (!oldcard) {
1514 /*
1515 * Fetch CSD from card.
1516 */
1517 err = mmc_send_csd(card, card->raw_csd);
1518 if (err)
1519 goto free_card;
1520
1521 err = mmc_decode_csd(card);
1522 if (err)
1523 goto free_card;
1524 err = mmc_decode_cid(card);
1525 if (err)
1526 goto free_card;
1527 }
1528
1529 /*
1530 * handling only for cards supporting DSR and hosts requesting
1531 * DSR configuration
1532 */
1533 if (card->csd.dsr_imp && host->dsr_req)
1534 mmc_set_dsr(host);
1535
1536 /*
1537 * Select card, as all following commands rely on that.
1538 */
1539 if (!mmc_host_is_spi(host)) {
1540 err = mmc_select_card(card);
1541 if (err)
1542 goto free_card;
1543 }
1544
1545 if (!oldcard) {
1546 /* Read extended CSD. */
1547 err = mmc_read_ext_csd(card);
1548 if (err)
1549 goto free_card;
1550
1551 /* If doing byte addressing, check if required to do sector
1552 * addressing. Handle the case of <2GB cards needing sector
1553 * addressing. See section 8.1 JEDEC Standard JED84-A441;
1554 * ocr register has bit 30 set for sector addressing.
1555 */
1556 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1557 mmc_card_set_blockaddr(card);
1558
1559 /* Erase size depends on CSD and Extended CSD */
1560 mmc_set_erase_size(card);
1561 }
1562
1563 card->en_strobe_enhanced = false;
1564
1565 /*
1566 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1567 * bit. This bit will be lost every time after a reset or power off.
1568 */
1569 if (card->ext_csd.partition_setting_completed ||
1570 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1571 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1572 EXT_CSD_ERASE_GROUP_DEF, 1,
1573 card->ext_csd.generic_cmd6_time);
1574
1575 if (err && err != -EBADMSG)
1576 goto free_card;
1577
1578 if (err) {
1579 err = 0;
1580 /*
1581 * Just disable enhanced area off & sz
1582 * will try to enable ERASE_GROUP_DEF
1583 * during next time reinit
1584 */
1585 card->ext_csd.enhanced_area_offset = -EINVAL;
1586 card->ext_csd.enhanced_area_size = -EINVAL;
1587 } else {
1588 card->ext_csd.erase_group_def = 1;
1589 /*
1590 * enable ERASE_GRP_DEF successfully.
1591 * This will affect the erase size, so
1592 * here need to reset erase size
1593 */
1594 mmc_set_erase_size(card);
1595 }
1596 }
1597
1598 /*
1599 * Ensure eMMC user default partition is enabled
1600 */
1601 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1602 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1603 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1604 card->ext_csd.part_config,
1605 card->ext_csd.part_time);
1606 if (err && err != -EBADMSG)
1607 goto free_card;
1608 }
1609
1610 /*
1611 * Enable power_off_notification byte in the ext_csd register
1612 */
1613 if (card->ext_csd.rev >= 6) {
1614 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1615 EXT_CSD_POWER_OFF_NOTIFICATION,
1616 EXT_CSD_POWER_ON,
1617 card->ext_csd.generic_cmd6_time);
1618 if (err && err != -EBADMSG)
1619 goto free_card;
1620
1621 /*
1622 * The err can be -EBADMSG or 0,
1623 * so check for success and update the flag
1624 */
1625 if (!err)
1626 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1627 }
1628
1629 /*
1630 * Sequence for Enhanced Strobe
1631 *
1632 * 1. CMD6(BUS_WIDTH) with 8 bit SDR bus
1633 * 2. CMD6(HS_TIMING) with HS mode
1634 * 3. Set timing and clock as HS mode
1635 * 4. CMD6(BUS_WIDTH) with 8 bit DDR bus and enhanced strobe
1636 * 5. CMD6(HS_TIMING) with HS400 mode
1637 * 6. Set timing and clock as HS400 mode and enhanced strobe
1638 * 7. CMD6(POWER_CLASS) with 8 bit DDR bus and MMC_HS200_MAX_DTR
1639 */
1640 if (card->ext_csd.enhanced_strobe_support &
1641 MMC_STROBE_ENHANCED_SUPPORT) {
1642 if (host->caps2 & MMC_CAP2_STROBE_ENHANCED &&
1643 host->caps2 & MMC_CAP2_HS400) {
1644 card->en_strobe_enhanced = true;
1645 pr_warning("%s: STROBE ENHANCED enable\n",
1646 mmc_hostname(card->host));
1647 }
1648 }
1649
1650 /*
1651 * Select timing interface
1652 */
1653 err = mmc_select_timing(card);
1654 if (err)
1655 goto free_card;
1656
1657 if (card->en_strobe_enhanced) {
1658 err = mmc_select_hs400(card);
1659 if (err)
1660 goto free_card;
1661 } else if (mmc_card_hs200(card)) {
1662 err = mmc_hs200_tuning(card);
1663 if (err)
1664 goto free_card;
1665
1666 err = mmc_select_hs400(card);
1667 if (err)
1668 goto free_card;
1669 } else {
1670 /* Select the desired bus width optionally */
1671 err = mmc_select_bus_width(card);
1672 if (!IS_ERR_VALUE(err) && mmc_card_hs(card)) {
1673 err = mmc_select_hs_ddr(card);
1674 if (err)
1675 goto free_card;
1676 }
1677 }
1678
1679 /*
1680 * Choose the power class with selected bus interface
1681 */
1682 mmc_select_powerclass(card);
1683
1684 /*
1685 * Enable HPI feature (if supported)
1686 */
1687 if (card->ext_csd.hpi) {
1688 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1689 EXT_CSD_HPI_MGMT, 1,
1690 card->ext_csd.generic_cmd6_time);
1691 if (err && err != -EBADMSG)
1692 goto free_card;
1693 if (err) {
1694 pr_warn("%s: Enabling HPI failed\n",
1695 mmc_hostname(card->host));
1696 err = 0;
1697 } else
1698 card->ext_csd.hpi_en = 1;
1699 }
1700
1701 /*
1702 * If cache size is higher than 0, this indicates
1703 * the existence of cache and it can be turned on.
1704 */
1705 if (card->ext_csd.cache_size > 0) {
1706 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1707 EXT_CSD_CACHE_CTRL, 1,
1708 card->ext_csd.generic_cmd6_time);
1709 if (err && err != -EBADMSG)
1710 goto free_card;
1711
1712 /*
1713 * Only if no error, cache is turned on successfully.
1714 */
1715 if (err) {
1716 pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
1717 mmc_hostname(card->host), err);
1718 card->ext_csd.cache_ctrl = 0;
1719 err = 0;
1720 } else {
1721 card->ext_csd.cache_ctrl = 1;
1722 }
1723 }
1724
1725 /*
1726 * The mandatory minimum values are defined for packed command.
1727 * read: 5, write: 3
1728 */
1729 if (card->ext_csd.max_packed_writes >= 3 &&
1730 card->ext_csd.max_packed_reads >= 5 &&
1731 host->caps2 & MMC_CAP2_PACKED_CMD) {
1732 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1733 EXT_CSD_EXP_EVENTS_CTRL,
1734 EXT_CSD_PACKED_EVENT_EN,
1735 card->ext_csd.generic_cmd6_time);
1736 if (err && err != -EBADMSG)
1737 goto free_card;
1738 if (err) {
1739 pr_warn("%s: Enabling packed event failed\n",
1740 mmc_hostname(card->host));
1741 card->ext_csd.packed_event_en = 0;
1742 err = 0;
1743 } else {
1744 card->ext_csd.packed_event_en = 1;
1745 }
1746 }
1747
1748 if (!oldcard)
1749 host->card = card;
1750
1751 return 0;
1752
1753free_card:
1754 if (!oldcard)
1755 mmc_remove_card(card);
1756err:
1757 return err;
1758}
1759
1760static int mmc_can_sleep(struct mmc_card *card)
1761{
1762 return (card && card->ext_csd.rev >= 3);
1763}
1764
1765static int mmc_sleep(struct mmc_host *host)
1766{
1767 struct mmc_command cmd = {0};
1768 struct mmc_card *card = host->card;
1769 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1770 int err;
1771
1772 /* Re-tuning can't be done once the card is deselected */
1773 mmc_retune_hold(host);
1774
1775 err = mmc_deselect_cards(host);
1776 if (err)
1777 goto out_release;
1778
1779 cmd.opcode = MMC_SLEEP_AWAKE;
1780 cmd.arg = card->rca << 16;
1781 cmd.arg |= 1 << 15;
1782
1783 /*
1784 * If the max_busy_timeout of the host is specified, validate it against
1785 * the sleep cmd timeout. A failure means we need to prevent the host
1786 * from doing hw busy detection, which is done by converting to a R1
1787 * response instead of a R1B.
1788 */
1789 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1790 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1791 } else {
1792 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1793 cmd.busy_timeout = timeout_ms;
1794 }
1795
1796 err = mmc_wait_for_cmd(host, &cmd, 0);
1797 if (err)
1798 goto out_release;
1799
1800 /*
1801 * If the host does not wait while the card signals busy, then we will
1802 * will have to wait the sleep/awake timeout. Note, we cannot use the
1803 * SEND_STATUS command to poll the status because that command (and most
1804 * others) is invalid while the card sleeps.
1805 */
1806 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1807 mmc_delay(timeout_ms);
1808
1809out_release:
1810 mmc_retune_release(host);
1811 return err;
1812}
1813
1814static int mmc_can_poweroff_notify(const struct mmc_card *card)
1815{
1816 return card &&
1817 mmc_card_mmc(card) &&
1818 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1819}
1820
1821static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1822{
1823 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1824 int err;
1825
1826 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1827 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1828 timeout = card->ext_csd.power_off_longtime;
1829
1830 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1831 EXT_CSD_POWER_OFF_NOTIFICATION,
1832 notify_type, timeout, true, false, false);
1833 if (err)
1834 pr_err("%s: Power Off Notification timed out, %u\n",
1835 mmc_hostname(card->host), timeout);
1836
1837 /* Disable the power off notification after the switch operation. */
1838 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1839
1840 return err;
1841}
1842
1843/*
1844 * Host is being removed. Free up the current card.
1845 */
1846static void mmc_remove(struct mmc_host *host)
1847{
1848 BUG_ON(!host);
1849 BUG_ON(!host->card);
1850
1851 mmc_remove_card(host->card);
1852 host->card = NULL;
1853}
1854
1855/*
1856 * Card detection - card is alive.
1857 */
1858static int mmc_alive(struct mmc_host *host)
1859{
1860 return mmc_send_status(host->card, NULL);
1861}
1862
1863/*
1864 * Card detection callback from host.
1865 */
1866static void mmc_detect(struct mmc_host *host)
1867{
1868 int err;
1869
1870 BUG_ON(!host);
1871 BUG_ON(!host->card);
1872
1873 mmc_get_card(host->card);
1874
1875 /*
1876 * Just check if our card has been removed.
1877 */
1878 err = _mmc_detect_card_removed(host);
1879
1880 mmc_put_card(host->card);
1881
1882 if (err) {
1883 mmc_remove(host);
1884
1885 mmc_claim_host(host);
1886 mmc_detach_bus(host);
1887 mmc_power_off(host);
1888 mmc_release_host(host);
1889 }
1890}
1891
1892static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1893{
1894 int err = 0;
1895 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1896 EXT_CSD_POWER_OFF_LONG;
1897
1898 BUG_ON(!host);
1899 BUG_ON(!host->card);
1900
1901 mmc_claim_host(host);
1902
1903 if (mmc_card_suspended(host->card))
1904 goto out;
1905
1906 if (mmc_card_doing_bkops(host->card)) {
1907 err = mmc_stop_bkops(host->card);
1908 if (err)
1909 goto out;
1910 }
1911
1912 err = mmc_flush_cache(host->card);
1913 if (err)
1914 goto out;
1915
1916 if (mmc_can_poweroff_notify(host->card) &&
1917 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1918 err = mmc_poweroff_notify(host->card, notify_type);
1919 else if (mmc_can_sleep(host->card))
1920 err = mmc_sleep(host);
1921 else if (!mmc_host_is_spi(host))
1922 err = mmc_deselect_cards(host);
1923
1924 if (!err) {
1925 mmc_power_off(host);
1926 mmc_card_set_suspended(host->card);
1927 }
1928out:
1929 mmc_release_host(host);
1930 return err;
1931}
1932
1933/*
1934 * Suspend callback
1935 */
1936static int mmc_suspend(struct mmc_host *host)
1937{
1938 int err;
1939
1940 err = _mmc_suspend(host, true);
1941 if (!err) {
1942 pm_runtime_disable(&host->card->dev);
1943 pm_runtime_set_suspended(&host->card->dev);
1944 }
1945
1946 return err;
1947}
1948
1949/*
1950 * This function tries to determine if the same card is still present
1951 * and, if so, restore all state to it.
1952 */
1953static int _mmc_resume(struct mmc_host *host)
1954{
1955 int err = 0;
1956
1957 BUG_ON(!host);
1958 BUG_ON(!host->card);
1959
1960 mmc_claim_host(host);
1961
1962 if (!mmc_card_suspended(host->card))
1963 goto out;
1964
1965 mmc_power_up(host, host->card->ocr);
1966 err = mmc_init_card(host, host->card->ocr, host->card);
1967 mmc_card_clr_suspended(host->card);
1968
1969out:
1970 mmc_release_host(host);
1971 return err;
1972}
1973
1974/*
1975 * Shutdown callback
1976 */
1977static int mmc_shutdown(struct mmc_host *host)
1978{
1979 int err = 0;
1980
1981 /*
1982 * In a specific case for poweroff notify, we need to resume the card
1983 * before we can shutdown it properly.
1984 */
1985 if (mmc_can_poweroff_notify(host->card) &&
1986 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1987 err = _mmc_resume(host);
1988
1989 if (!err)
1990 err = _mmc_suspend(host, false);
1991
1992 return err;
1993}
1994
1995/*
1996 * Callback for resume.
1997 */
1998static int mmc_resume(struct mmc_host *host)
1999{
2000 int err = 0;
2001
2002 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
2003 err = _mmc_resume(host);
2004 pm_runtime_set_active(&host->card->dev);
2005 pm_runtime_mark_last_busy(&host->card->dev);
2006 }
2007 pm_runtime_enable(&host->card->dev);
2008
2009 return err;
2010}
2011
2012/*
2013 * Callback for runtime_suspend.
2014 */
2015static int mmc_runtime_suspend(struct mmc_host *host)
2016{
2017 int err;
2018
2019 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
2020 return 0;
2021
2022 err = _mmc_suspend(host, true);
2023 if (err)
2024 pr_err("%s: error %d doing aggressive suspend\n",
2025 mmc_hostname(host), err);
2026
2027 return err;
2028}
2029
2030/*
2031 * Callback for runtime_resume.
2032 */
2033static int mmc_runtime_resume(struct mmc_host *host)
2034{
2035 int err;
2036
2037 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
2038 return 0;
2039
2040 err = _mmc_resume(host);
2041 if (err)
2042 pr_err("%s: error %d doing aggressive resume\n",
2043 mmc_hostname(host), err);
2044
2045 return 0;
2046}
2047
2048int mmc_can_reset(struct mmc_card *card)
2049{
2050 u8 rst_n_function;
2051
2052 rst_n_function = card->ext_csd.rst_n_function;
2053 if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
2054 return 0;
2055 return 1;
2056}
2057EXPORT_SYMBOL(mmc_can_reset);
2058
2059static int mmc_reset(struct mmc_host *host)
2060{
2061 struct mmc_card *card = host->card;
2062
2063 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
2064 return -EOPNOTSUPP;
2065
2066 if (!mmc_can_reset(card))
2067 return -EOPNOTSUPP;
2068
2069 mmc_set_clock(host, host->f_init);
2070
2071 host->ops->hw_reset(host);
2072
2073 /* Set initial state and call mmc_set_ios */
2074 mmc_set_initial_state(host);
2075
2076 return mmc_init_card(host, card->ocr, card);
2077}
2078
2079static const struct mmc_bus_ops mmc_ops = {
2080 .remove = mmc_remove,
2081 .detect = mmc_detect,
2082 .suspend = mmc_suspend,
2083 .resume = mmc_resume,
2084 .runtime_suspend = mmc_runtime_suspend,
2085 .runtime_resume = mmc_runtime_resume,
2086 .alive = mmc_alive,
2087 .shutdown = mmc_shutdown,
2088 .reset = mmc_reset,
2089};
2090
2091/*
2092 * Starting point for MMC card init.
2093 */
2094int mmc_attach_mmc(struct mmc_host *host)
2095{
2096 int err;
2097 u32 ocr, rocr;
2098
2099 BUG_ON(!host);
2100 WARN_ON(!host->claimed);
2101
2102 /* Set correct bus mode for MMC before attempting attach */
2103 if (!mmc_host_is_spi(host))
2104 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
2105
2106 err = mmc_send_op_cond(host, 0, &ocr);
2107 if (err)
2108 return err;
2109
2110 mmc_attach_bus(host, &mmc_ops);
2111 if (host->ocr_avail_mmc)
2112 host->ocr_avail = host->ocr_avail_mmc;
2113
2114 /*
2115 * We need to get OCR a different way for SPI.
2116 */
2117 if (mmc_host_is_spi(host)) {
2118 err = mmc_spi_read_ocr(host, 1, &ocr);
2119 if (err)
2120 goto err;
2121 }
2122
2123 rocr = mmc_select_voltage(host, ocr);
2124
2125 /*
2126 * Can we support the voltage of the card?
2127 */
2128 if (!rocr) {
2129 err = -EINVAL;
2130 goto err;
2131 }
2132
2133 /*
2134 * Detect and init the card.
2135 */
2136 err = mmc_init_card(host, rocr, NULL);
2137 if (err)
2138 goto err;
2139
2140 mmc_release_host(host);
2141 err = mmc_add_card(host->card);
2142 if (err)
2143 goto remove_card;
2144
2145 mmc_claim_host(host);
2146 return 0;
2147
2148remove_card:
2149 mmc_remove_card(host->card);
2150 mmc_claim_host(host);
2151 host->card = NULL;
2152err:
2153 mmc_detach_bus(host);
2154
2155 pr_err("%s: error %d whilst initialising MMC card\n",
2156 mmc_hostname(host), err);
2157
2158 return err;
2159}