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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/slab.h>
15
16#include <linux/mmc/host.h>
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19
20#include "core.h"
21#include "bus.h"
22#include "mmc_ops.h"
23#include "sd_ops.h"
24
25static const unsigned int tran_exp[] = {
26 10000, 100000, 1000000, 10000000,
27 0, 0, 0, 0
28};
29
30static const unsigned char tran_mant[] = {
31 0, 10, 12, 13, 15, 20, 25, 30,
32 35, 40, 45, 50, 55, 60, 70, 80,
33};
34
35static const unsigned int tacc_exp[] = {
36 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
37};
38
39static const unsigned int tacc_mant[] = {
40 0, 10, 12, 13, 15, 20, 25, 30,
41 35, 40, 45, 50, 55, 60, 70, 80,
42};
43
44#define UNSTUFF_BITS(resp,start,size) \
45 ({ \
46 const int __size = size; \
47 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
48 const int __off = 3 - ((start) / 32); \
49 const int __shft = (start) & 31; \
50 u32 __res; \
51 \
52 __res = resp[__off] >> __shft; \
53 if (__size + __shft > 32) \
54 __res |= resp[__off-1] << ((32 - __shft) % 32); \
55 __res & __mask; \
56 })
57
58/*
59 * Given the decoded CSD structure, decode the raw CID to our CID structure.
60 */
61static int mmc_decode_cid(struct mmc_card *card)
62{
63 u32 *resp = card->raw_cid;
64
65 /*
66 * The selection of the format here is based upon published
67 * specs from sandisk and from what people have reported.
68 */
69 switch (card->csd.mmca_vsn) {
70 case 0: /* MMC v1.0 - v1.2 */
71 case 1: /* MMC v1.4 */
72 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
73 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
74 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
75 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
76 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
77 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
78 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
79 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
80 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
81 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
82 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
83 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
84 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
85 break;
86
87 case 2: /* MMC v2.0 - v2.2 */
88 case 3: /* MMC v3.1 - v3.3 */
89 case 4: /* MMC v4 */
90 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
91 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
92 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
93 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
94 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
95 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
96 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
97 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
98 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
99 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
100 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
101 break;
102
103 default:
104 printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
105 mmc_hostname(card->host), card->csd.mmca_vsn);
106 return -EINVAL;
107 }
108
109 return 0;
110}
111
112static void mmc_set_erase_size(struct mmc_card *card)
113{
114 if (card->ext_csd.erase_group_def & 1)
115 card->erase_size = card->ext_csd.hc_erase_size;
116 else
117 card->erase_size = card->csd.erase_size;
118
119 mmc_init_erase(card);
120}
121
122/*
123 * Given a 128-bit response, decode to our card CSD structure.
124 */
125static int mmc_decode_csd(struct mmc_card *card)
126{
127 struct mmc_csd *csd = &card->csd;
128 unsigned int e, m, a, b;
129 u32 *resp = card->raw_csd;
130
131 /*
132 * We only understand CSD structure v1.1 and v1.2.
133 * v1.2 has extra information in bits 15, 11 and 10.
134 * We also support eMMC v4.4 & v4.41.
135 */
136 csd->structure = UNSTUFF_BITS(resp, 126, 2);
137 if (csd->structure == 0) {
138 printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
139 mmc_hostname(card->host), csd->structure);
140 return -EINVAL;
141 }
142
143 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
144 m = UNSTUFF_BITS(resp, 115, 4);
145 e = UNSTUFF_BITS(resp, 112, 3);
146 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
147 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
148
149 m = UNSTUFF_BITS(resp, 99, 4);
150 e = UNSTUFF_BITS(resp, 96, 3);
151 csd->max_dtr = tran_exp[e] * tran_mant[m];
152 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
153
154 e = UNSTUFF_BITS(resp, 47, 3);
155 m = UNSTUFF_BITS(resp, 62, 12);
156 csd->capacity = (1 + m) << (e + 2);
157
158 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
159 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
160 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
161 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
162 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
163 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
164 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
165
166 if (csd->write_blkbits >= 9) {
167 a = UNSTUFF_BITS(resp, 42, 5);
168 b = UNSTUFF_BITS(resp, 37, 5);
169 csd->erase_size = (a + 1) * (b + 1);
170 csd->erase_size <<= csd->write_blkbits - 9;
171 }
172
173 return 0;
174}
175
176/*
177 * Read extended CSD.
178 */
179static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
180{
181 int err;
182 u8 *ext_csd;
183
184 BUG_ON(!card);
185 BUG_ON(!new_ext_csd);
186
187 *new_ext_csd = NULL;
188
189 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
190 return 0;
191
192 /*
193 * As the ext_csd is so large and mostly unused, we don't store the
194 * raw block in mmc_card.
195 */
196 ext_csd = kmalloc(512, GFP_KERNEL);
197 if (!ext_csd) {
198 printk(KERN_ERR "%s: could not allocate a buffer to "
199 "receive the ext_csd.\n", mmc_hostname(card->host));
200 return -ENOMEM;
201 }
202
203 err = mmc_send_ext_csd(card, ext_csd);
204 if (err) {
205 kfree(ext_csd);
206 *new_ext_csd = NULL;
207
208 /* If the host or the card can't do the switch,
209 * fail more gracefully. */
210 if ((err != -EINVAL)
211 && (err != -ENOSYS)
212 && (err != -EFAULT))
213 return err;
214
215 /*
216 * High capacity cards should have this "magic" size
217 * stored in their CSD.
218 */
219 if (card->csd.capacity == (4096 * 512)) {
220 printk(KERN_ERR "%s: unable to read EXT_CSD "
221 "on a possible high capacity card. "
222 "Card will be ignored.\n",
223 mmc_hostname(card->host));
224 } else {
225 printk(KERN_WARNING "%s: unable to read "
226 "EXT_CSD, performance might "
227 "suffer.\n",
228 mmc_hostname(card->host));
229 err = 0;
230 }
231 } else
232 *new_ext_csd = ext_csd;
233
234 return err;
235}
236
237/*
238 * Decode extended CSD.
239 */
240static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
241{
242 int err = 0;
243
244 BUG_ON(!card);
245
246 if (!ext_csd)
247 return 0;
248
249 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
250 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
251 if (card->csd.structure == 3) {
252 if (card->ext_csd.raw_ext_csd_structure > 2) {
253 printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
254 "version %d\n", mmc_hostname(card->host),
255 card->ext_csd.raw_ext_csd_structure);
256 err = -EINVAL;
257 goto out;
258 }
259 }
260
261 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
262 if (card->ext_csd.rev > 6) {
263 printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
264 mmc_hostname(card->host), card->ext_csd.rev);
265 err = -EINVAL;
266 goto out;
267 }
268
269 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
270 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
271 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
272 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
273 if (card->ext_csd.rev >= 2) {
274 card->ext_csd.sectors =
275 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
276 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
277 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
278 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
279
280 /* Cards with density > 2GiB are sector addressed */
281 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
282 mmc_card_set_blockaddr(card);
283 }
284 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
285 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
286 case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
287 EXT_CSD_CARD_TYPE_26:
288 card->ext_csd.hs_max_dtr = 52000000;
289 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
290 break;
291 case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
292 EXT_CSD_CARD_TYPE_26:
293 card->ext_csd.hs_max_dtr = 52000000;
294 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
295 break;
296 case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
297 EXT_CSD_CARD_TYPE_26:
298 card->ext_csd.hs_max_dtr = 52000000;
299 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
300 break;
301 case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
302 card->ext_csd.hs_max_dtr = 52000000;
303 break;
304 case EXT_CSD_CARD_TYPE_26:
305 card->ext_csd.hs_max_dtr = 26000000;
306 break;
307 default:
308 /* MMC v4 spec says this cannot happen */
309 printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
310 "support any high-speed modes.\n",
311 mmc_hostname(card->host));
312 }
313
314 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
315 card->ext_csd.raw_erase_timeout_mult =
316 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
317 card->ext_csd.raw_hc_erase_grp_size =
318 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
319 if (card->ext_csd.rev >= 3) {
320 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
321 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
322
323 /* EXT_CSD value is in units of 10ms, but we store in ms */
324 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
325
326 /* Sleep / awake timeout in 100ns units */
327 if (sa_shift > 0 && sa_shift <= 0x17)
328 card->ext_csd.sa_timeout =
329 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
330 card->ext_csd.erase_group_def =
331 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
332 card->ext_csd.hc_erase_timeout = 300 *
333 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
334 card->ext_csd.hc_erase_size =
335 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
336
337 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
338
339 /*
340 * There are two boot regions of equal size, defined in
341 * multiples of 128K.
342 */
343 card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
344 }
345
346 card->ext_csd.raw_hc_erase_gap_size =
347 ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
348 card->ext_csd.raw_sec_trim_mult =
349 ext_csd[EXT_CSD_SEC_TRIM_MULT];
350 card->ext_csd.raw_sec_erase_mult =
351 ext_csd[EXT_CSD_SEC_ERASE_MULT];
352 card->ext_csd.raw_sec_feature_support =
353 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
354 card->ext_csd.raw_trim_mult =
355 ext_csd[EXT_CSD_TRIM_MULT];
356 if (card->ext_csd.rev >= 4) {
357 /*
358 * Enhanced area feature support -- check whether the eMMC
359 * card has the Enhanced area enabled. If so, export enhanced
360 * area offset and size to user by adding sysfs interface.
361 */
362 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
363 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
364 u8 hc_erase_grp_sz =
365 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
366 u8 hc_wp_grp_sz =
367 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
368
369 card->ext_csd.enhanced_area_en = 1;
370 /*
371 * calculate the enhanced data area offset, in bytes
372 */
373 card->ext_csd.enhanced_area_offset =
374 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
375 (ext_csd[137] << 8) + ext_csd[136];
376 if (mmc_card_blockaddr(card))
377 card->ext_csd.enhanced_area_offset <<= 9;
378 /*
379 * calculate the enhanced data area size, in kilobytes
380 */
381 card->ext_csd.enhanced_area_size =
382 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
383 ext_csd[140];
384 card->ext_csd.enhanced_area_size *=
385 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
386 card->ext_csd.enhanced_area_size <<= 9;
387 } else {
388 /*
389 * If the enhanced area is not enabled, disable these
390 * device attributes.
391 */
392 card->ext_csd.enhanced_area_offset = -EINVAL;
393 card->ext_csd.enhanced_area_size = -EINVAL;
394 }
395 card->ext_csd.sec_trim_mult =
396 ext_csd[EXT_CSD_SEC_TRIM_MULT];
397 card->ext_csd.sec_erase_mult =
398 ext_csd[EXT_CSD_SEC_ERASE_MULT];
399 card->ext_csd.sec_feature_support =
400 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
401 card->ext_csd.trim_timeout = 300 *
402 ext_csd[EXT_CSD_TRIM_MULT];
403 }
404
405 if (card->ext_csd.rev >= 5)
406 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
407
408 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
409 card->erased_byte = 0xFF;
410 else
411 card->erased_byte = 0x0;
412
413out:
414 return err;
415}
416
417static inline void mmc_free_ext_csd(u8 *ext_csd)
418{
419 kfree(ext_csd);
420}
421
422
423static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
424{
425 u8 *bw_ext_csd;
426 int err;
427
428 if (bus_width == MMC_BUS_WIDTH_1)
429 return 0;
430
431 err = mmc_get_ext_csd(card, &bw_ext_csd);
432
433 if (err || bw_ext_csd == NULL) {
434 if (bus_width != MMC_BUS_WIDTH_1)
435 err = -EINVAL;
436 goto out;
437 }
438
439 if (bus_width == MMC_BUS_WIDTH_1)
440 goto out;
441
442 /* only compare read only fields */
443 err = (!(card->ext_csd.raw_partition_support ==
444 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
445 (card->ext_csd.raw_erased_mem_count ==
446 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
447 (card->ext_csd.rev ==
448 bw_ext_csd[EXT_CSD_REV]) &&
449 (card->ext_csd.raw_ext_csd_structure ==
450 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
451 (card->ext_csd.raw_card_type ==
452 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
453 (card->ext_csd.raw_s_a_timeout ==
454 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
455 (card->ext_csd.raw_hc_erase_gap_size ==
456 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
457 (card->ext_csd.raw_erase_timeout_mult ==
458 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
459 (card->ext_csd.raw_hc_erase_grp_size ==
460 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
461 (card->ext_csd.raw_sec_trim_mult ==
462 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
463 (card->ext_csd.raw_sec_erase_mult ==
464 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
465 (card->ext_csd.raw_sec_feature_support ==
466 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
467 (card->ext_csd.raw_trim_mult ==
468 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
469 (card->ext_csd.raw_sectors[0] ==
470 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
471 (card->ext_csd.raw_sectors[1] ==
472 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
473 (card->ext_csd.raw_sectors[2] ==
474 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
475 (card->ext_csd.raw_sectors[3] ==
476 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
477 if (err)
478 err = -EINVAL;
479
480out:
481 mmc_free_ext_csd(bw_ext_csd);
482 return err;
483}
484
485MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
486 card->raw_cid[2], card->raw_cid[3]);
487MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
488 card->raw_csd[2], card->raw_csd[3]);
489MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
490MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
491MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
492MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
493MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
494MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
495MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
496MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
497MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
498MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
499 card->ext_csd.enhanced_area_offset);
500MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
501
502static struct attribute *mmc_std_attrs[] = {
503 &dev_attr_cid.attr,
504 &dev_attr_csd.attr,
505 &dev_attr_date.attr,
506 &dev_attr_erase_size.attr,
507 &dev_attr_preferred_erase_size.attr,
508 &dev_attr_fwrev.attr,
509 &dev_attr_hwrev.attr,
510 &dev_attr_manfid.attr,
511 &dev_attr_name.attr,
512 &dev_attr_oemid.attr,
513 &dev_attr_serial.attr,
514 &dev_attr_enhanced_area_offset.attr,
515 &dev_attr_enhanced_area_size.attr,
516 NULL,
517};
518
519static struct attribute_group mmc_std_attr_group = {
520 .attrs = mmc_std_attrs,
521};
522
523static const struct attribute_group *mmc_attr_groups[] = {
524 &mmc_std_attr_group,
525 NULL,
526};
527
528static struct device_type mmc_type = {
529 .groups = mmc_attr_groups,
530};
531
532/*
533 * Handle the detection and initialisation of a card.
534 *
535 * In the case of a resume, "oldcard" will contain the card
536 * we're trying to reinitialise.
537 */
538static int mmc_init_card(struct mmc_host *host, u32 ocr,
539 struct mmc_card *oldcard)
540{
541 struct mmc_card *card;
542 int err, ddr = 0;
543 u32 cid[4];
544 unsigned int max_dtr;
545 u32 rocr;
546 u8 *ext_csd = NULL;
547
548 BUG_ON(!host);
549 WARN_ON(!host->claimed);
550
551 /*
552 * Since we're changing the OCR value, we seem to
553 * need to tell some cards to go back to the idle
554 * state. We wait 1ms to give cards time to
555 * respond.
556 */
557 mmc_go_idle(host);
558
559 /* The extra bit indicates that we support high capacity */
560 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
561 if (err)
562 goto err;
563
564 /*
565 * For SPI, enable CRC as appropriate.
566 */
567 if (mmc_host_is_spi(host)) {
568 err = mmc_spi_set_crc(host, use_spi_crc);
569 if (err)
570 goto err;
571 }
572
573 /*
574 * Fetch CID from card.
575 */
576 if (mmc_host_is_spi(host))
577 err = mmc_send_cid(host, cid);
578 else
579 err = mmc_all_send_cid(host, cid);
580 if (err)
581 goto err;
582
583 if (oldcard) {
584 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
585 err = -ENOENT;
586 goto err;
587 }
588
589 card = oldcard;
590 } else {
591 /*
592 * Allocate card structure.
593 */
594 card = mmc_alloc_card(host, &mmc_type);
595 if (IS_ERR(card)) {
596 err = PTR_ERR(card);
597 goto err;
598 }
599
600 card->type = MMC_TYPE_MMC;
601 card->rca = 1;
602 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
603 }
604
605 /*
606 * For native busses: set card RCA and quit open drain mode.
607 */
608 if (!mmc_host_is_spi(host)) {
609 err = mmc_set_relative_addr(card);
610 if (err)
611 goto free_card;
612
613 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
614 }
615
616 if (!oldcard) {
617 /*
618 * Fetch CSD from card.
619 */
620 err = mmc_send_csd(card, card->raw_csd);
621 if (err)
622 goto free_card;
623
624 err = mmc_decode_csd(card);
625 if (err)
626 goto free_card;
627 err = mmc_decode_cid(card);
628 if (err)
629 goto free_card;
630 }
631
632 /*
633 * Select card, as all following commands rely on that.
634 */
635 if (!mmc_host_is_spi(host)) {
636 err = mmc_select_card(card);
637 if (err)
638 goto free_card;
639 }
640
641 if (!oldcard) {
642 /*
643 * Fetch and process extended CSD.
644 */
645
646 err = mmc_get_ext_csd(card, &ext_csd);
647 if (err)
648 goto free_card;
649 err = mmc_read_ext_csd(card, ext_csd);
650 if (err)
651 goto free_card;
652
653 /* If doing byte addressing, check if required to do sector
654 * addressing. Handle the case of <2GB cards needing sector
655 * addressing. See section 8.1 JEDEC Standard JED84-A441;
656 * ocr register has bit 30 set for sector addressing.
657 */
658 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
659 mmc_card_set_blockaddr(card);
660
661 /* Erase size depends on CSD and Extended CSD */
662 mmc_set_erase_size(card);
663 }
664
665 /*
666 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
667 * bit. This bit will be lost every time after a reset or power off.
668 */
669 if (card->ext_csd.enhanced_area_en) {
670 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
671 EXT_CSD_ERASE_GROUP_DEF, 1, 0);
672
673 if (err && err != -EBADMSG)
674 goto free_card;
675
676 if (err) {
677 err = 0;
678 /*
679 * Just disable enhanced area off & sz
680 * will try to enable ERASE_GROUP_DEF
681 * during next time reinit
682 */
683 card->ext_csd.enhanced_area_offset = -EINVAL;
684 card->ext_csd.enhanced_area_size = -EINVAL;
685 } else {
686 card->ext_csd.erase_group_def = 1;
687 /*
688 * enable ERASE_GRP_DEF successfully.
689 * This will affect the erase size, so
690 * here need to reset erase size
691 */
692 mmc_set_erase_size(card);
693 }
694 }
695
696 /*
697 * Ensure eMMC user default partition is enabled
698 */
699 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
700 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
701 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
702 card->ext_csd.part_config,
703 card->ext_csd.part_time);
704 if (err && err != -EBADMSG)
705 goto free_card;
706 }
707
708 /*
709 * Activate high speed (if supported)
710 */
711 if ((card->ext_csd.hs_max_dtr != 0) &&
712 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
713 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
714 EXT_CSD_HS_TIMING, 1, 0);
715 if (err && err != -EBADMSG)
716 goto free_card;
717
718 if (err) {
719 printk(KERN_WARNING "%s: switch to highspeed failed\n",
720 mmc_hostname(card->host));
721 err = 0;
722 } else {
723 mmc_card_set_highspeed(card);
724 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
725 }
726 }
727
728 /*
729 * Compute bus speed.
730 */
731 max_dtr = (unsigned int)-1;
732
733 if (mmc_card_highspeed(card)) {
734 if (max_dtr > card->ext_csd.hs_max_dtr)
735 max_dtr = card->ext_csd.hs_max_dtr;
736 } else if (max_dtr > card->csd.max_dtr) {
737 max_dtr = card->csd.max_dtr;
738 }
739
740 mmc_set_clock(host, max_dtr);
741
742 /*
743 * Indicate DDR mode (if supported).
744 */
745 if (mmc_card_highspeed(card)) {
746 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
747 && ((host->caps & (MMC_CAP_1_8V_DDR |
748 MMC_CAP_UHS_DDR50))
749 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
750 ddr = MMC_1_8V_DDR_MODE;
751 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
752 && ((host->caps & (MMC_CAP_1_2V_DDR |
753 MMC_CAP_UHS_DDR50))
754 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
755 ddr = MMC_1_2V_DDR_MODE;
756 }
757
758 /*
759 * Activate wide bus and DDR (if supported).
760 */
761 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
762 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
763 static unsigned ext_csd_bits[][2] = {
764 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
765 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
766 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
767 };
768 static unsigned bus_widths[] = {
769 MMC_BUS_WIDTH_8,
770 MMC_BUS_WIDTH_4,
771 MMC_BUS_WIDTH_1
772 };
773 unsigned idx, bus_width = 0;
774
775 if (host->caps & MMC_CAP_8_BIT_DATA)
776 idx = 0;
777 else
778 idx = 1;
779 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
780 bus_width = bus_widths[idx];
781 if (bus_width == MMC_BUS_WIDTH_1)
782 ddr = 0; /* no DDR for 1-bit width */
783 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
784 EXT_CSD_BUS_WIDTH,
785 ext_csd_bits[idx][0],
786 0);
787 if (!err) {
788 mmc_set_bus_width(card->host, bus_width);
789
790 /*
791 * If controller can't handle bus width test,
792 * compare ext_csd previously read in 1 bit mode
793 * against ext_csd at new bus width
794 */
795 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
796 err = mmc_compare_ext_csds(card,
797 bus_width);
798 else
799 err = mmc_bus_test(card, bus_width);
800 if (!err)
801 break;
802 }
803 }
804
805 if (!err && ddr) {
806 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
807 EXT_CSD_BUS_WIDTH,
808 ext_csd_bits[idx][1],
809 0);
810 }
811 if (err) {
812 printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
813 "failed\n", mmc_hostname(card->host),
814 1 << bus_width, ddr);
815 goto free_card;
816 } else if (ddr) {
817 /*
818 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
819 * signaling.
820 *
821 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
822 *
823 * 1.8V vccq at 3.3V core voltage (vcc) is not required
824 * in the JEDEC spec for DDR.
825 *
826 * Do not force change in vccq since we are obviously
827 * working and no change to vccq is needed.
828 *
829 * WARNING: eMMC rules are NOT the same as SD DDR
830 */
831 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
832 err = mmc_set_signal_voltage(host,
833 MMC_SIGNAL_VOLTAGE_120, 0);
834 if (err)
835 goto err;
836 }
837 mmc_card_set_ddr_mode(card);
838 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
839 mmc_set_bus_width(card->host, bus_width);
840 }
841 }
842
843 if (!oldcard)
844 host->card = card;
845
846 mmc_free_ext_csd(ext_csd);
847 return 0;
848
849free_card:
850 if (!oldcard)
851 mmc_remove_card(card);
852err:
853 mmc_free_ext_csd(ext_csd);
854
855 return err;
856}
857
858/*
859 * Host is being removed. Free up the current card.
860 */
861static void mmc_remove(struct mmc_host *host)
862{
863 BUG_ON(!host);
864 BUG_ON(!host->card);
865
866 mmc_remove_card(host->card);
867 host->card = NULL;
868}
869
870/*
871 * Card detection callback from host.
872 */
873static void mmc_detect(struct mmc_host *host)
874{
875 int err;
876
877 BUG_ON(!host);
878 BUG_ON(!host->card);
879
880 mmc_claim_host(host);
881
882 /*
883 * Just check if our card has been removed.
884 */
885 err = mmc_send_status(host->card, NULL);
886
887 mmc_release_host(host);
888
889 if (err) {
890 mmc_remove(host);
891
892 mmc_claim_host(host);
893 mmc_detach_bus(host);
894 mmc_release_host(host);
895 }
896}
897
898/*
899 * Suspend callback from host.
900 */
901static int mmc_suspend(struct mmc_host *host)
902{
903 BUG_ON(!host);
904 BUG_ON(!host->card);
905
906 mmc_claim_host(host);
907 if (!mmc_host_is_spi(host))
908 mmc_deselect_cards(host);
909 host->card->state &= ~MMC_STATE_HIGHSPEED;
910 mmc_release_host(host);
911
912 return 0;
913}
914
915/*
916 * Resume callback from host.
917 *
918 * This function tries to determine if the same card is still present
919 * and, if so, restore all state to it.
920 */
921static int mmc_resume(struct mmc_host *host)
922{
923 int err;
924
925 BUG_ON(!host);
926 BUG_ON(!host->card);
927
928 mmc_claim_host(host);
929 err = mmc_init_card(host, host->ocr, host->card);
930 mmc_release_host(host);
931
932 return err;
933}
934
935static int mmc_power_restore(struct mmc_host *host)
936{
937 int ret;
938
939 host->card->state &= ~MMC_STATE_HIGHSPEED;
940 mmc_claim_host(host);
941 ret = mmc_init_card(host, host->ocr, host->card);
942 mmc_release_host(host);
943
944 return ret;
945}
946
947static int mmc_sleep(struct mmc_host *host)
948{
949 struct mmc_card *card = host->card;
950 int err = -ENOSYS;
951
952 if (card && card->ext_csd.rev >= 3) {
953 err = mmc_card_sleepawake(host, 1);
954 if (err < 0)
955 pr_debug("%s: Error %d while putting card into sleep",
956 mmc_hostname(host), err);
957 }
958
959 return err;
960}
961
962static int mmc_awake(struct mmc_host *host)
963{
964 struct mmc_card *card = host->card;
965 int err = -ENOSYS;
966
967 if (card && card->ext_csd.rev >= 3) {
968 err = mmc_card_sleepawake(host, 0);
969 if (err < 0)
970 pr_debug("%s: Error %d while awaking sleeping card",
971 mmc_hostname(host), err);
972 }
973
974 return err;
975}
976
977static const struct mmc_bus_ops mmc_ops = {
978 .awake = mmc_awake,
979 .sleep = mmc_sleep,
980 .remove = mmc_remove,
981 .detect = mmc_detect,
982 .suspend = NULL,
983 .resume = NULL,
984 .power_restore = mmc_power_restore,
985};
986
987static const struct mmc_bus_ops mmc_ops_unsafe = {
988 .awake = mmc_awake,
989 .sleep = mmc_sleep,
990 .remove = mmc_remove,
991 .detect = mmc_detect,
992 .suspend = mmc_suspend,
993 .resume = mmc_resume,
994 .power_restore = mmc_power_restore,
995};
996
997static void mmc_attach_bus_ops(struct mmc_host *host)
998{
999 const struct mmc_bus_ops *bus_ops;
1000
1001 if (!mmc_card_is_removable(host))
1002 bus_ops = &mmc_ops_unsafe;
1003 else
1004 bus_ops = &mmc_ops;
1005 mmc_attach_bus(host, bus_ops);
1006}
1007
1008/*
1009 * Starting point for MMC card init.
1010 */
1011int mmc_attach_mmc(struct mmc_host *host)
1012{
1013 int err;
1014 u32 ocr;
1015
1016 BUG_ON(!host);
1017 WARN_ON(!host->claimed);
1018
1019 err = mmc_send_op_cond(host, 0, &ocr);
1020 if (err)
1021 return err;
1022
1023 mmc_attach_bus_ops(host);
1024 if (host->ocr_avail_mmc)
1025 host->ocr_avail = host->ocr_avail_mmc;
1026
1027 /*
1028 * We need to get OCR a different way for SPI.
1029 */
1030 if (mmc_host_is_spi(host)) {
1031 err = mmc_spi_read_ocr(host, 1, &ocr);
1032 if (err)
1033 goto err;
1034 }
1035
1036 /*
1037 * Sanity check the voltages that the card claims to
1038 * support.
1039 */
1040 if (ocr & 0x7F) {
1041 printk(KERN_WARNING "%s: card claims to support voltages "
1042 "below the defined range. These will be ignored.\n",
1043 mmc_hostname(host));
1044 ocr &= ~0x7F;
1045 }
1046
1047 host->ocr = mmc_select_voltage(host, ocr);
1048
1049 /*
1050 * Can we support the voltage of the card?
1051 */
1052 if (!host->ocr) {
1053 err = -EINVAL;
1054 goto err;
1055 }
1056
1057 /*
1058 * Detect and init the card.
1059 */
1060 err = mmc_init_card(host, host->ocr, NULL);
1061 if (err)
1062 goto err;
1063
1064 mmc_release_host(host);
1065 err = mmc_add_card(host->card);
1066 mmc_claim_host(host);
1067 if (err)
1068 goto remove_card;
1069
1070 return 0;
1071
1072remove_card:
1073 mmc_release_host(host);
1074 mmc_remove_card(host->card);
1075 mmc_claim_host(host);
1076 host->card = NULL;
1077err:
1078 mmc_detach_bus(host);
1079
1080 printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
1081 mmc_hostname(host), err);
1082
1083 return err;
1084}
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
27static const unsigned int tran_exp[] = {
28 10000, 100000, 1000000, 10000000,
29 0, 0, 0, 0
30};
31
32static 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
37static const unsigned int tacc_exp[] = {
38 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
39};
40
41static 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 */
63static 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
115static 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 */
128static 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 */
182static 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
240static 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 */
273static 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
574out:
575 return err;
576}
577
578static inline void mmc_free_ext_csd(u8 *ext_csd)
579{
580 kfree(ext_csd);
581}
582
583
584static 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
653out:
654 mmc_free_ext_csd(bw_ext_csd);
655 return err;
656}
657
658MMC_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]);
660MMC_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]);
662MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
663MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
664MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
665MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
666MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
667MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
668MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
669MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
670MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
671MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
672MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
673 card->ext_csd.enhanced_area_offset);
674MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
675MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
676MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
677
678static 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
698static struct attribute_group mmc_std_attr_group = {
699 .attrs = mmc_std_attrs,
700};
701
702static const struct attribute_group *mmc_attr_groups[] = {
703 &mmc_std_attr_group,
704 NULL,
705};
706
707static 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 */
717static 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 */
794static 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,
861 card->ext_csd.generic_cmd6_time,
862 true, true, true);
863err:
864 return err;
865}
866
867/*
868 * Handle the detection and initialisation of a card.
869 *
870 * In the case of a resume, "oldcard" will contain the card
871 * we're trying to reinitialise.
872 */
873static int mmc_init_card(struct mmc_host *host, u32 ocr,
874 struct mmc_card *oldcard)
875{
876 struct mmc_card *card;
877 int err, ddr = 0;
878 u32 cid[4];
879 unsigned int max_dtr;
880 u32 rocr;
881 u8 *ext_csd = NULL;
882
883 BUG_ON(!host);
884 WARN_ON(!host->claimed);
885
886 /* Set correct bus mode for MMC before attempting init */
887 if (!mmc_host_is_spi(host))
888 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
889
890 /*
891 * Since we're changing the OCR value, we seem to
892 * need to tell some cards to go back to the idle
893 * state. We wait 1ms to give cards time to
894 * respond.
895 * mmc_go_idle is needed for eMMC that are asleep
896 */
897 mmc_go_idle(host);
898
899 /* The extra bit indicates that we support high capacity */
900 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
901 if (err)
902 goto err;
903
904 /*
905 * For SPI, enable CRC as appropriate.
906 */
907 if (mmc_host_is_spi(host)) {
908 err = mmc_spi_set_crc(host, use_spi_crc);
909 if (err)
910 goto err;
911 }
912
913 /*
914 * Fetch CID from card.
915 */
916 if (mmc_host_is_spi(host))
917 err = mmc_send_cid(host, cid);
918 else
919 err = mmc_all_send_cid(host, cid);
920 if (err)
921 goto err;
922
923 if (oldcard) {
924 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
925 err = -ENOENT;
926 goto err;
927 }
928
929 card = oldcard;
930 } else {
931 /*
932 * Allocate card structure.
933 */
934 card = mmc_alloc_card(host, &mmc_type);
935 if (IS_ERR(card)) {
936 err = PTR_ERR(card);
937 goto err;
938 }
939
940 card->ocr = ocr;
941 card->type = MMC_TYPE_MMC;
942 card->rca = 1;
943 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
944 }
945
946 /*
947 * For native busses: set card RCA and quit open drain mode.
948 */
949 if (!mmc_host_is_spi(host)) {
950 err = mmc_set_relative_addr(card);
951 if (err)
952 goto free_card;
953
954 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
955 }
956
957 if (!oldcard) {
958 /*
959 * Fetch CSD from card.
960 */
961 err = mmc_send_csd(card, card->raw_csd);
962 if (err)
963 goto free_card;
964
965 err = mmc_decode_csd(card);
966 if (err)
967 goto free_card;
968 err = mmc_decode_cid(card);
969 if (err)
970 goto free_card;
971 }
972
973 /*
974 * Select card, as all following commands rely on that.
975 */
976 if (!mmc_host_is_spi(host)) {
977 err = mmc_select_card(card);
978 if (err)
979 goto free_card;
980 }
981
982 if (!oldcard) {
983 /*
984 * Fetch and process extended CSD.
985 */
986
987 err = mmc_get_ext_csd(card, &ext_csd);
988 if (err)
989 goto free_card;
990 err = mmc_read_ext_csd(card, ext_csd);
991 if (err)
992 goto free_card;
993
994 /* If doing byte addressing, check if required to do sector
995 * addressing. Handle the case of <2GB cards needing sector
996 * addressing. See section 8.1 JEDEC Standard JED84-A441;
997 * ocr register has bit 30 set for sector addressing.
998 */
999 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
1000 mmc_card_set_blockaddr(card);
1001
1002 /* Erase size depends on CSD and Extended CSD */
1003 mmc_set_erase_size(card);
1004 }
1005
1006 /*
1007 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
1008 * bit. This bit will be lost every time after a reset or power off.
1009 */
1010 if (card->ext_csd.enhanced_area_en ||
1011 (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
1012 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1013 EXT_CSD_ERASE_GROUP_DEF, 1,
1014 card->ext_csd.generic_cmd6_time);
1015
1016 if (err && err != -EBADMSG)
1017 goto free_card;
1018
1019 if (err) {
1020 err = 0;
1021 /*
1022 * Just disable enhanced area off & sz
1023 * will try to enable ERASE_GROUP_DEF
1024 * during next time reinit
1025 */
1026 card->ext_csd.enhanced_area_offset = -EINVAL;
1027 card->ext_csd.enhanced_area_size = -EINVAL;
1028 } else {
1029 card->ext_csd.erase_group_def = 1;
1030 /*
1031 * enable ERASE_GRP_DEF successfully.
1032 * This will affect the erase size, so
1033 * here need to reset erase size
1034 */
1035 mmc_set_erase_size(card);
1036 }
1037 }
1038
1039 /*
1040 * Ensure eMMC user default partition is enabled
1041 */
1042 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
1043 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
1044 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
1045 card->ext_csd.part_config,
1046 card->ext_csd.part_time);
1047 if (err && err != -EBADMSG)
1048 goto free_card;
1049 }
1050
1051 /*
1052 * Enable power_off_notification byte in the ext_csd register
1053 */
1054 if (card->ext_csd.rev >= 6) {
1055 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1056 EXT_CSD_POWER_OFF_NOTIFICATION,
1057 EXT_CSD_POWER_ON,
1058 card->ext_csd.generic_cmd6_time);
1059 if (err && err != -EBADMSG)
1060 goto free_card;
1061
1062 /*
1063 * The err can be -EBADMSG or 0,
1064 * so check for success and update the flag
1065 */
1066 if (!err)
1067 card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
1068 }
1069
1070 /*
1071 * Activate high speed (if supported)
1072 */
1073 if (card->ext_csd.hs_max_dtr != 0) {
1074 err = 0;
1075 if (card->ext_csd.hs_max_dtr > 52000000 &&
1076 host->caps2 & MMC_CAP2_HS200)
1077 err = mmc_select_hs200(card);
1078 else if (host->caps & MMC_CAP_MMC_HIGHSPEED)
1079 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1080 EXT_CSD_HS_TIMING, 1,
1081 card->ext_csd.generic_cmd6_time,
1082 true, true, true);
1083
1084 if (err && err != -EBADMSG)
1085 goto free_card;
1086
1087 if (err) {
1088 pr_warning("%s: switch to highspeed failed\n",
1089 mmc_hostname(card->host));
1090 err = 0;
1091 } else {
1092 if (card->ext_csd.hs_max_dtr > 52000000 &&
1093 host->caps2 & MMC_CAP2_HS200) {
1094 mmc_card_set_hs200(card);
1095 mmc_set_timing(card->host,
1096 MMC_TIMING_MMC_HS200);
1097 } else {
1098 mmc_card_set_highspeed(card);
1099 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
1100 }
1101 }
1102 }
1103
1104 /*
1105 * Compute bus speed.
1106 */
1107 max_dtr = (unsigned int)-1;
1108
1109 if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
1110 if (max_dtr > card->ext_csd.hs_max_dtr)
1111 max_dtr = card->ext_csd.hs_max_dtr;
1112 if (mmc_card_highspeed(card) && (max_dtr > 52000000))
1113 max_dtr = 52000000;
1114 } else if (max_dtr > card->csd.max_dtr) {
1115 max_dtr = card->csd.max_dtr;
1116 }
1117
1118 mmc_set_clock(host, max_dtr);
1119
1120 /*
1121 * Indicate DDR mode (if supported).
1122 */
1123 if (mmc_card_highspeed(card)) {
1124 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
1125 && (host->caps & MMC_CAP_1_8V_DDR))
1126 ddr = MMC_1_8V_DDR_MODE;
1127 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
1128 && (host->caps & MMC_CAP_1_2V_DDR))
1129 ddr = MMC_1_2V_DDR_MODE;
1130 }
1131
1132 /*
1133 * Indicate HS200 SDR mode (if supported).
1134 */
1135 if (mmc_card_hs200(card)) {
1136 u32 ext_csd_bits;
1137 u32 bus_width = card->host->ios.bus_width;
1138
1139 /*
1140 * For devices supporting HS200 mode, the bus width has
1141 * to be set before executing the tuning function. If
1142 * set before tuning, then device will respond with CRC
1143 * errors for responses on CMD line. So for HS200 the
1144 * sequence will be
1145 * 1. set bus width 4bit / 8 bit (1 bit not supported)
1146 * 2. switch to HS200 mode
1147 * 3. set the clock to > 52Mhz <=200MHz and
1148 * 4. execute tuning for HS200
1149 */
1150 if ((host->caps2 & MMC_CAP2_HS200) &&
1151 card->host->ops->execute_tuning) {
1152 mmc_host_clk_hold(card->host);
1153 err = card->host->ops->execute_tuning(card->host,
1154 MMC_SEND_TUNING_BLOCK_HS200);
1155 mmc_host_clk_release(card->host);
1156 }
1157 if (err) {
1158 pr_warning("%s: tuning execution failed\n",
1159 mmc_hostname(card->host));
1160 goto err;
1161 }
1162
1163 ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
1164 EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
1165 err = mmc_select_powerclass(card, ext_csd_bits);
1166 if (err)
1167 pr_warning("%s: power class selection to bus width %d"
1168 " failed\n", mmc_hostname(card->host),
1169 1 << bus_width);
1170 }
1171
1172 /*
1173 * Activate wide bus and DDR (if supported).
1174 */
1175 if (!mmc_card_hs200(card) &&
1176 (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
1177 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
1178 static unsigned ext_csd_bits[][2] = {
1179 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
1180 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
1181 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
1182 };
1183 static unsigned bus_widths[] = {
1184 MMC_BUS_WIDTH_8,
1185 MMC_BUS_WIDTH_4,
1186 MMC_BUS_WIDTH_1
1187 };
1188 unsigned idx, bus_width = 0;
1189
1190 if (host->caps & MMC_CAP_8_BIT_DATA)
1191 idx = 0;
1192 else
1193 idx = 1;
1194 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
1195 bus_width = bus_widths[idx];
1196 if (bus_width == MMC_BUS_WIDTH_1)
1197 ddr = 0; /* no DDR for 1-bit width */
1198 err = mmc_select_powerclass(card, ext_csd_bits[idx][0]);
1199 if (err)
1200 pr_warning("%s: power class selection to "
1201 "bus width %d failed\n",
1202 mmc_hostname(card->host),
1203 1 << bus_width);
1204
1205 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1206 EXT_CSD_BUS_WIDTH,
1207 ext_csd_bits[idx][0],
1208 card->ext_csd.generic_cmd6_time);
1209 if (!err) {
1210 mmc_set_bus_width(card->host, bus_width);
1211
1212 /*
1213 * If controller can't handle bus width test,
1214 * compare ext_csd previously read in 1 bit mode
1215 * against ext_csd at new bus width
1216 */
1217 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1218 err = mmc_compare_ext_csds(card,
1219 bus_width);
1220 else
1221 err = mmc_bus_test(card, bus_width);
1222 if (!err)
1223 break;
1224 }
1225 }
1226
1227 if (!err && ddr) {
1228 err = mmc_select_powerclass(card, ext_csd_bits[idx][1]);
1229 if (err)
1230 pr_warning("%s: power class selection to "
1231 "bus width %d ddr %d failed\n",
1232 mmc_hostname(card->host),
1233 1 << bus_width, ddr);
1234
1235 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1236 EXT_CSD_BUS_WIDTH,
1237 ext_csd_bits[idx][1],
1238 card->ext_csd.generic_cmd6_time);
1239 }
1240 if (err) {
1241 pr_warning("%s: switch to bus width %d ddr %d "
1242 "failed\n", mmc_hostname(card->host),
1243 1 << bus_width, ddr);
1244 goto free_card;
1245 } else if (ddr) {
1246 /*
1247 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1248 * signaling.
1249 *
1250 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1251 *
1252 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1253 * in the JEDEC spec for DDR.
1254 *
1255 * Do not force change in vccq since we are obviously
1256 * working and no change to vccq is needed.
1257 *
1258 * WARNING: eMMC rules are NOT the same as SD DDR
1259 */
1260 if (ddr == MMC_1_2V_DDR_MODE) {
1261 err = __mmc_set_signal_voltage(host,
1262 MMC_SIGNAL_VOLTAGE_120);
1263 if (err)
1264 goto err;
1265 }
1266 mmc_card_set_ddr_mode(card);
1267 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1268 mmc_set_bus_width(card->host, bus_width);
1269 }
1270 }
1271
1272 /*
1273 * Enable HPI feature (if supported)
1274 */
1275 if (card->ext_csd.hpi) {
1276 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1277 EXT_CSD_HPI_MGMT, 1,
1278 card->ext_csd.generic_cmd6_time);
1279 if (err && err != -EBADMSG)
1280 goto free_card;
1281 if (err) {
1282 pr_warning("%s: Enabling HPI failed\n",
1283 mmc_hostname(card->host));
1284 err = 0;
1285 } else
1286 card->ext_csd.hpi_en = 1;
1287 }
1288
1289 /*
1290 * If cache size is higher than 0, this indicates
1291 * the existence of cache and it can be turned on.
1292 */
1293 if (card->ext_csd.cache_size > 0) {
1294 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1295 EXT_CSD_CACHE_CTRL, 1,
1296 card->ext_csd.generic_cmd6_time);
1297 if (err && err != -EBADMSG)
1298 goto free_card;
1299
1300 /*
1301 * Only if no error, cache is turned on successfully.
1302 */
1303 if (err) {
1304 pr_warning("%s: Cache is supported, "
1305 "but failed to turn on (%d)\n",
1306 mmc_hostname(card->host), err);
1307 card->ext_csd.cache_ctrl = 0;
1308 err = 0;
1309 } else {
1310 card->ext_csd.cache_ctrl = 1;
1311 }
1312 }
1313
1314 /*
1315 * The mandatory minimum values are defined for packed command.
1316 * read: 5, write: 3
1317 */
1318 if (card->ext_csd.max_packed_writes >= 3 &&
1319 card->ext_csd.max_packed_reads >= 5 &&
1320 host->caps2 & MMC_CAP2_PACKED_CMD) {
1321 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1322 EXT_CSD_EXP_EVENTS_CTRL,
1323 EXT_CSD_PACKED_EVENT_EN,
1324 card->ext_csd.generic_cmd6_time);
1325 if (err && err != -EBADMSG)
1326 goto free_card;
1327 if (err) {
1328 pr_warn("%s: Enabling packed event failed\n",
1329 mmc_hostname(card->host));
1330 card->ext_csd.packed_event_en = 0;
1331 err = 0;
1332 } else {
1333 card->ext_csd.packed_event_en = 1;
1334 }
1335 }
1336
1337 if (!oldcard)
1338 host->card = card;
1339
1340 mmc_free_ext_csd(ext_csd);
1341 return 0;
1342
1343free_card:
1344 if (!oldcard)
1345 mmc_remove_card(card);
1346err:
1347 mmc_free_ext_csd(ext_csd);
1348
1349 return err;
1350}
1351
1352static int mmc_can_sleep(struct mmc_card *card)
1353{
1354 return (card && card->ext_csd.rev >= 3);
1355}
1356
1357static int mmc_sleep(struct mmc_host *host)
1358{
1359 struct mmc_command cmd = {0};
1360 struct mmc_card *card = host->card;
1361 unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
1362 int err;
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 /*
1373 * If the max_busy_timeout of the host is specified, validate it against
1374 * the sleep cmd timeout. A failure means we need to prevent the host
1375 * from doing hw busy detection, which is done by converting to a R1
1376 * response instead of a R1B.
1377 */
1378 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
1379 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1380 } else {
1381 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
1382 cmd.busy_timeout = timeout_ms;
1383 }
1384
1385 err = mmc_wait_for_cmd(host, &cmd, 0);
1386 if (err)
1387 return err;
1388
1389 /*
1390 * If the host does not wait while the card signals busy, then we will
1391 * will have to wait the sleep/awake timeout. Note, we cannot use the
1392 * SEND_STATUS command to poll the status because that command (and most
1393 * others) is invalid while the card sleeps.
1394 */
1395 if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
1396 mmc_delay(timeout_ms);
1397
1398 return err;
1399}
1400
1401static int mmc_can_poweroff_notify(const struct mmc_card *card)
1402{
1403 return card &&
1404 mmc_card_mmc(card) &&
1405 (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
1406}
1407
1408static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
1409{
1410 unsigned int timeout = card->ext_csd.generic_cmd6_time;
1411 int err;
1412
1413 /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
1414 if (notify_type == EXT_CSD_POWER_OFF_LONG)
1415 timeout = card->ext_csd.power_off_longtime;
1416
1417 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1418 EXT_CSD_POWER_OFF_NOTIFICATION,
1419 notify_type, timeout, true, false, false);
1420 if (err)
1421 pr_err("%s: Power Off Notification timed out, %u\n",
1422 mmc_hostname(card->host), timeout);
1423
1424 /* Disable the power off notification after the switch operation. */
1425 card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
1426
1427 return err;
1428}
1429
1430/*
1431 * Host is being removed. Free up the current card.
1432 */
1433static void mmc_remove(struct mmc_host *host)
1434{
1435 BUG_ON(!host);
1436 BUG_ON(!host->card);
1437
1438 mmc_remove_card(host->card);
1439 host->card = NULL;
1440}
1441
1442/*
1443 * Card detection - card is alive.
1444 */
1445static int mmc_alive(struct mmc_host *host)
1446{
1447 return mmc_send_status(host->card, NULL);
1448}
1449
1450/*
1451 * Card detection callback from host.
1452 */
1453static void mmc_detect(struct mmc_host *host)
1454{
1455 int err;
1456
1457 BUG_ON(!host);
1458 BUG_ON(!host->card);
1459
1460 mmc_get_card(host->card);
1461
1462 /*
1463 * Just check if our card has been removed.
1464 */
1465 err = _mmc_detect_card_removed(host);
1466
1467 mmc_put_card(host->card);
1468
1469 if (err) {
1470 mmc_remove(host);
1471
1472 mmc_claim_host(host);
1473 mmc_detach_bus(host);
1474 mmc_power_off(host);
1475 mmc_release_host(host);
1476 }
1477}
1478
1479static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
1480{
1481 int err = 0;
1482 unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
1483 EXT_CSD_POWER_OFF_LONG;
1484
1485 BUG_ON(!host);
1486 BUG_ON(!host->card);
1487
1488 mmc_claim_host(host);
1489
1490 if (mmc_card_suspended(host->card))
1491 goto out;
1492
1493 if (mmc_card_doing_bkops(host->card)) {
1494 err = mmc_stop_bkops(host->card);
1495 if (err)
1496 goto out;
1497 }
1498
1499 err = mmc_flush_cache(host->card);
1500 if (err)
1501 goto out;
1502
1503 if (mmc_can_poweroff_notify(host->card) &&
1504 ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
1505 err = mmc_poweroff_notify(host->card, notify_type);
1506 else if (mmc_can_sleep(host->card))
1507 err = mmc_sleep(host);
1508 else if (!mmc_host_is_spi(host))
1509 err = mmc_deselect_cards(host);
1510 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1511
1512 if (!err) {
1513 mmc_power_off(host);
1514 mmc_card_set_suspended(host->card);
1515 }
1516out:
1517 mmc_release_host(host);
1518 return err;
1519}
1520
1521/*
1522 * Suspend callback
1523 */
1524static int mmc_suspend(struct mmc_host *host)
1525{
1526 int err;
1527
1528 err = _mmc_suspend(host, true);
1529 if (!err) {
1530 pm_runtime_disable(&host->card->dev);
1531 pm_runtime_set_suspended(&host->card->dev);
1532 }
1533
1534 return err;
1535}
1536
1537/*
1538 * This function tries to determine if the same card is still present
1539 * and, if so, restore all state to it.
1540 */
1541static int _mmc_resume(struct mmc_host *host)
1542{
1543 int err = 0;
1544
1545 BUG_ON(!host);
1546 BUG_ON(!host->card);
1547
1548 mmc_claim_host(host);
1549
1550 if (!mmc_card_suspended(host->card))
1551 goto out;
1552
1553 mmc_power_up(host, host->card->ocr);
1554 err = mmc_init_card(host, host->card->ocr, host->card);
1555 mmc_card_clr_suspended(host->card);
1556
1557out:
1558 mmc_release_host(host);
1559 return err;
1560}
1561
1562/*
1563 * Shutdown callback
1564 */
1565static int mmc_shutdown(struct mmc_host *host)
1566{
1567 int err = 0;
1568
1569 /*
1570 * In a specific case for poweroff notify, we need to resume the card
1571 * before we can shutdown it properly.
1572 */
1573 if (mmc_can_poweroff_notify(host->card) &&
1574 !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
1575 err = _mmc_resume(host);
1576
1577 if (!err)
1578 err = _mmc_suspend(host, false);
1579
1580 return err;
1581}
1582
1583/*
1584 * Callback for resume.
1585 */
1586static int mmc_resume(struct mmc_host *host)
1587{
1588 int err = 0;
1589
1590 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1591 err = _mmc_resume(host);
1592 pm_runtime_set_active(&host->card->dev);
1593 pm_runtime_mark_last_busy(&host->card->dev);
1594 }
1595 pm_runtime_enable(&host->card->dev);
1596
1597 return err;
1598}
1599
1600/*
1601 * Callback for runtime_suspend.
1602 */
1603static int mmc_runtime_suspend(struct mmc_host *host)
1604{
1605 int err;
1606
1607 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1608 return 0;
1609
1610 err = _mmc_suspend(host, true);
1611 if (err)
1612 pr_err("%s: error %d doing aggessive suspend\n",
1613 mmc_hostname(host), err);
1614
1615 return err;
1616}
1617
1618/*
1619 * Callback for runtime_resume.
1620 */
1621static int mmc_runtime_resume(struct mmc_host *host)
1622{
1623 int err;
1624
1625 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1626 return 0;
1627
1628 err = _mmc_resume(host);
1629 if (err)
1630 pr_err("%s: error %d doing aggessive resume\n",
1631 mmc_hostname(host), err);
1632
1633 return 0;
1634}
1635
1636static int mmc_power_restore(struct mmc_host *host)
1637{
1638 int ret;
1639
1640 host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
1641 mmc_claim_host(host);
1642 ret = mmc_init_card(host, host->card->ocr, host->card);
1643 mmc_release_host(host);
1644
1645 return ret;
1646}
1647
1648static const struct mmc_bus_ops mmc_ops = {
1649 .remove = mmc_remove,
1650 .detect = mmc_detect,
1651 .suspend = mmc_suspend,
1652 .resume = mmc_resume,
1653 .runtime_suspend = mmc_runtime_suspend,
1654 .runtime_resume = mmc_runtime_resume,
1655 .power_restore = mmc_power_restore,
1656 .alive = mmc_alive,
1657 .shutdown = mmc_shutdown,
1658};
1659
1660/*
1661 * Starting point for MMC card init.
1662 */
1663int mmc_attach_mmc(struct mmc_host *host)
1664{
1665 int err;
1666 u32 ocr, rocr;
1667
1668 BUG_ON(!host);
1669 WARN_ON(!host->claimed);
1670
1671 /* Set correct bus mode for MMC before attempting attach */
1672 if (!mmc_host_is_spi(host))
1673 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1674
1675 err = mmc_send_op_cond(host, 0, &ocr);
1676 if (err)
1677 return err;
1678
1679 mmc_attach_bus(host, &mmc_ops);
1680 if (host->ocr_avail_mmc)
1681 host->ocr_avail = host->ocr_avail_mmc;
1682
1683 /*
1684 * We need to get OCR a different way for SPI.
1685 */
1686 if (mmc_host_is_spi(host)) {
1687 err = mmc_spi_read_ocr(host, 1, &ocr);
1688 if (err)
1689 goto err;
1690 }
1691
1692 rocr = mmc_select_voltage(host, ocr);
1693
1694 /*
1695 * Can we support the voltage of the card?
1696 */
1697 if (!rocr) {
1698 err = -EINVAL;
1699 goto err;
1700 }
1701
1702 /*
1703 * Detect and init the card.
1704 */
1705 err = mmc_init_card(host, rocr, NULL);
1706 if (err)
1707 goto err;
1708
1709 mmc_release_host(host);
1710 err = mmc_add_card(host->card);
1711 mmc_claim_host(host);
1712 if (err)
1713 goto remove_card;
1714
1715 return 0;
1716
1717remove_card:
1718 mmc_release_host(host);
1719 mmc_remove_card(host->card);
1720 mmc_claim_host(host);
1721 host->card = NULL;
1722err:
1723 mmc_detach_bus(host);
1724
1725 pr_err("%s: error %d whilst initialising MMC card\n",
1726 mmc_hostname(host), err);
1727
1728 return err;
1729}