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mmc: core: Fix voltage select in DDR mode
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / mmc / core / mmc.c
blobfb7c27fd41df920cb582842fffec560bb665cd40
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
17 #include <linux/mmc/host.h>
18 #include <linux/mmc/card.h>
19 #include <linux/mmc/mmc.h>
20
21 #include "core.h"
22 #include "bus.h"
23 #include "mmc_ops.h"
24 #include "sd_ops.h"
25
26 static const unsigned int tran_exp[] = {
27 10000, 100000, 1000000, 10000000,
28 0, 0, 0, 0
29 };
30
31 static const unsigned char tran_mant[] = {
32 0, 10, 12, 13, 15, 20, 25, 30,
33 35, 40, 45, 50, 55, 60, 70, 80,
34 };
35
36 static const unsigned int tacc_exp[] = {
37 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
38 };
39
40 static const unsigned int tacc_mant[] = {
41 0, 10, 12, 13, 15, 20, 25, 30,
42 35, 40, 45, 50, 55, 60, 70, 80,
43 };
44
45 #define UNSTUFF_BITS(resp,start,size) \
46 ({ \
47 const int __size = size; \
48 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
49 const int __off = 3 - ((start) / 32); \
50 const int __shft = (start) & 31; \
51 u32 __res; \
52 \
53 __res = resp[__off] >> __shft; \
54 if (__size + __shft > 32) \
55 __res |= resp[__off-1] << ((32 - __shft) % 32); \
56 __res & __mask; \
57 })
58
59 /*
60 * Given the decoded CSD structure, decode the raw CID to our CID structure.
61 */
62 static int mmc_decode_cid(struct mmc_card *card)
63 {
64 u32 *resp = card->raw_cid;
65
66 /*
67 * The selection of the format here is based upon published
68 * specs from sandisk and from what people have reported.
69 */
70 switch (card->csd.mmca_vsn) {
71 case 0: /* MMC v1.0 - v1.2 */
72 case 1: /* MMC v1.4 */
73 card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
74 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
75 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
76 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
77 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
78 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
79 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
80 card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
84 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
85 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
86 break;
87
88 case 2: /* MMC v2.0 - v2.2 */
89 case 3: /* MMC v3.1 - v3.3 */
90 case 4: /* MMC v4 */
91 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
92 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
93 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
94 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
95 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
96 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
97 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
98 card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
99 card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
100 card->cid.month = UNSTUFF_BITS(resp, 12, 4);
101 card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
102 break;
103
104 default:
105 pr_err("%s: card has unknown MMCA version %d\n",
106 mmc_hostname(card->host), card->csd.mmca_vsn);
107 return -EINVAL;
108 }
109
110 return 0;
111 }
112
113 static void mmc_set_erase_size(struct mmc_card *card)
114 {
115 if (card->ext_csd.erase_group_def & 1)
116 card->erase_size = card->ext_csd.hc_erase_size;
117 else
118 card->erase_size = card->csd.erase_size;
119
120 mmc_init_erase(card);
121 }
122
123 /*
124 * Given a 128-bit response, decode to our card CSD structure.
125 */
126 static int mmc_decode_csd(struct mmc_card *card)
127 {
128 struct mmc_csd *csd = &card->csd;
129 unsigned int e, m, a, b;
130 u32 *resp = card->raw_csd;
131
132 /*
133 * We only understand CSD structure v1.1 and v1.2.
134 * v1.2 has extra information in bits 15, 11 and 10.
135 * We also support eMMC v4.4 & v4.41.
136 */
137 csd->structure = UNSTUFF_BITS(resp, 126, 2);
138 if (csd->structure == 0) {
139 pr_err("%s: unrecognised CSD structure version %d\n",
140 mmc_hostname(card->host), csd->structure);
141 return -EINVAL;
142 }
143
144 csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
145 m = UNSTUFF_BITS(resp, 115, 4);
146 e = UNSTUFF_BITS(resp, 112, 3);
147 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
148 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
149
150 m = UNSTUFF_BITS(resp, 99, 4);
151 e = UNSTUFF_BITS(resp, 96, 3);
152 csd->max_dtr = tran_exp[e] * tran_mant[m];
153 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
154
155 e = UNSTUFF_BITS(resp, 47, 3);
156 m = UNSTUFF_BITS(resp, 62, 12);
157 csd->capacity = (1 + m) << (e + 2);
158
159 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
160 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
161 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
162 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
163 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
164 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
165 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
166
167 if (csd->write_blkbits >= 9) {
168 a = UNSTUFF_BITS(resp, 42, 5);
169 b = UNSTUFF_BITS(resp, 37, 5);
170 csd->erase_size = (a + 1) * (b + 1);
171 csd->erase_size <<= csd->write_blkbits - 9;
172 }
173
174 return 0;
175 }
176
177 /*
178 * Read extended CSD.
179 */
180 static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
181 {
182 int err;
183 u8 *ext_csd;
184
185 BUG_ON(!card);
186 BUG_ON(!new_ext_csd);
187
188 *new_ext_csd = NULL;
189
190 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
191 return 0;
192
193 /*
194 * As the ext_csd is so large and mostly unused, we don't store the
195 * raw block in mmc_card.
196 */
197 ext_csd = kmalloc(512, GFP_KERNEL);
198 if (!ext_csd) {
199 pr_err("%s: could not allocate a buffer to "
200 "receive the ext_csd.\n", mmc_hostname(card->host));
201 return -ENOMEM;
202 }
203
204 err = mmc_send_ext_csd(card, ext_csd);
205 if (err) {
206 kfree(ext_csd);
207 *new_ext_csd = NULL;
208
209 /* If the host or the card can't do the switch,
210 * fail more gracefully. */
211 if ((err != -EINVAL)
212 && (err != -ENOSYS)
213 && (err != -EFAULT))
214 return err;
215
216 /*
217 * High capacity cards should have this "magic" size
218 * stored in their CSD.
219 */
220 if (card->csd.capacity == (4096 * 512)) {
221 pr_err("%s: unable to read EXT_CSD "
222 "on a possible high capacity card. "
223 "Card will be ignored.\n",
224 mmc_hostname(card->host));
225 } else {
226 pr_warning("%s: unable to read "
227 "EXT_CSD, performance might "
228 "suffer.\n",
229 mmc_hostname(card->host));
230 err = 0;
231 }
232 } else
233 *new_ext_csd = ext_csd;
234
235 return err;
236 }
237
238 /*
239 * Decode extended CSD.
240 */
241 static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
242 {
243 int err = 0, idx;
244 unsigned int part_size;
245 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
246
247 BUG_ON(!card);
248
249 if (!ext_csd)
250 return 0;
251
252 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
253 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
254 if (card->csd.structure == 3) {
255 if (card->ext_csd.raw_ext_csd_structure > 2) {
256 pr_err("%s: unrecognised EXT_CSD structure "
257 "version %d\n", mmc_hostname(card->host),
258 card->ext_csd.raw_ext_csd_structure);
259 err = -EINVAL;
260 goto out;
261 }
262 }
263
264 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
265 if (card->ext_csd.rev > 6) {
266 pr_err("%s: unrecognised EXT_CSD revision %d\n",
267 mmc_hostname(card->host), card->ext_csd.rev);
268 err = -EINVAL;
269 goto out;
270 }
271
272 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
273 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
274 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
275 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
276 if (card->ext_csd.rev >= 2) {
277 card->ext_csd.sectors =
278 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
279 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
280 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
281 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
282
283 /* Cards with density > 2GiB are sector addressed */
284 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
285 mmc_card_set_blockaddr(card);
286 }
287 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
288 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
289 case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
290 EXT_CSD_CARD_TYPE_26:
291 card->ext_csd.hs_max_dtr = 52000000;
292 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
293 break;
294 case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
295 EXT_CSD_CARD_TYPE_26:
296 card->ext_csd.hs_max_dtr = 52000000;
297 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
298 break;
299 case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
300 EXT_CSD_CARD_TYPE_26:
301 card->ext_csd.hs_max_dtr = 52000000;
302 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
303 break;
304 case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
305 card->ext_csd.hs_max_dtr = 52000000;
306 break;
307 case EXT_CSD_CARD_TYPE_26:
308 card->ext_csd.hs_max_dtr = 26000000;
309 break;
310 default:
311 /* MMC v4 spec says this cannot happen */
312 pr_warning("%s: card is mmc v4 but doesn't "
313 "support any high-speed modes.\n",
314 mmc_hostname(card->host));
315 }
316
317 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
318 card->ext_csd.raw_erase_timeout_mult =
319 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
320 card->ext_csd.raw_hc_erase_grp_size =
321 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
322 if (card->ext_csd.rev >= 3) {
323 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
324 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
325
326 /* EXT_CSD value is in units of 10ms, but we store in ms */
327 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
328
329 /* Sleep / awake timeout in 100ns units */
330 if (sa_shift > 0 && sa_shift <= 0x17)
331 card->ext_csd.sa_timeout =
332 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
333 card->ext_csd.erase_group_def =
334 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
335 card->ext_csd.hc_erase_timeout = 300 *
336 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
337 card->ext_csd.hc_erase_size =
338 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
339
340 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
341
342 /*
343 * There are two boot regions of equal size, defined in
344 * multiples of 128K.
345 */
346 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
347 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
348 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
349 mmc_part_add(card, part_size,
350 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
351 "boot%d", idx, true);
352 }
353 }
354 }
355
356 card->ext_csd.raw_hc_erase_gap_size =
357 ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
358 card->ext_csd.raw_sec_trim_mult =
359 ext_csd[EXT_CSD_SEC_TRIM_MULT];
360 card->ext_csd.raw_sec_erase_mult =
361 ext_csd[EXT_CSD_SEC_ERASE_MULT];
362 card->ext_csd.raw_sec_feature_support =
363 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
364 card->ext_csd.raw_trim_mult =
365 ext_csd[EXT_CSD_TRIM_MULT];
366 if (card->ext_csd.rev >= 4) {
367 /*
368 * Enhanced area feature support -- check whether the eMMC
369 * card has the Enhanced area enabled. If so, export enhanced
370 * area offset and size to user by adding sysfs interface.
371 */
372 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
373 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
374 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
375 hc_erase_grp_sz =
376 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
377 hc_wp_grp_sz =
378 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
379
380 card->ext_csd.enhanced_area_en = 1;
381 /*
382 * calculate the enhanced data area offset, in bytes
383 */
384 card->ext_csd.enhanced_area_offset =
385 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
386 (ext_csd[137] << 8) + ext_csd[136];
387 if (mmc_card_blockaddr(card))
388 card->ext_csd.enhanced_area_offset <<= 9;
389 /*
390 * calculate the enhanced data area size, in kilobytes
391 */
392 card->ext_csd.enhanced_area_size =
393 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
394 ext_csd[140];
395 card->ext_csd.enhanced_area_size *=
396 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
397 card->ext_csd.enhanced_area_size <<= 9;
398 } else {
399 /*
400 * If the enhanced area is not enabled, disable these
401 * device attributes.
402 */
403 card->ext_csd.enhanced_area_offset = -EINVAL;
404 card->ext_csd.enhanced_area_size = -EINVAL;
405 }
406
407 /*
408 * General purpose partition feature support --
409 * If ext_csd has the size of general purpose partitions,
410 * set size, part_cfg, partition name in mmc_part.
411 */
412 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
413 EXT_CSD_PART_SUPPORT_PART_EN) {
414 if (card->ext_csd.enhanced_area_en != 1) {
415 hc_erase_grp_sz =
416 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
417 hc_wp_grp_sz =
418 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
419
420 card->ext_csd.enhanced_area_en = 1;
421 }
422
423 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
424 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
425 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
426 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
427 continue;
428 part_size =
429 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
430 << 16) +
431 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
432 << 8) +
433 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
434 part_size *= (size_t)(hc_erase_grp_sz *
435 hc_wp_grp_sz);
436 mmc_part_add(card, part_size << 19,
437 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
438 "gp%d", idx, false);
439 }
440 }
441 card->ext_csd.sec_trim_mult =
442 ext_csd[EXT_CSD_SEC_TRIM_MULT];
443 card->ext_csd.sec_erase_mult =
444 ext_csd[EXT_CSD_SEC_ERASE_MULT];
445 card->ext_csd.sec_feature_support =
446 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
447 card->ext_csd.trim_timeout = 300 *
448 ext_csd[EXT_CSD_TRIM_MULT];
449 }
450
451 if (card->ext_csd.rev >= 5) {
452 /* check whether the eMMC card supports HPI */
453 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
454 card->ext_csd.hpi = 1;
455 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
456 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
457 else
458 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
459 /*
460 * Indicate the maximum timeout to close
461 * a command interrupted by HPI
462 */
463 card->ext_csd.out_of_int_time =
464 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
465 }
466
467 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
468 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
469 }
470
471 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
472 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
473 card->erased_byte = 0xFF;
474 else
475 card->erased_byte = 0x0;
476
477 /* eMMC v4.5 or later */
478 if (card->ext_csd.rev >= 6) {
479 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
480
481 card->ext_csd.generic_cmd6_time = 10 *
482 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
483 card->ext_csd.power_off_longtime = 10 *
484 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
485
486 card->ext_csd.cache_size =
487 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
488 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
489 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
490 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
491 }
492
493 out:
494 return err;
495 }
496
497 static inline void mmc_free_ext_csd(u8 *ext_csd)
498 {
499 kfree(ext_csd);
500 }
501
502
503 static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
504 {
505 u8 *bw_ext_csd;
506 int err;
507
508 if (bus_width == MMC_BUS_WIDTH_1)
509 return 0;
510
511 err = mmc_get_ext_csd(card, &bw_ext_csd);
512
513 if (err || bw_ext_csd == NULL) {
514 if (bus_width != MMC_BUS_WIDTH_1)
515 err = -EINVAL;
516 goto out;
517 }
518
519 if (bus_width == MMC_BUS_WIDTH_1)
520 goto out;
521
522 /* only compare read only fields */
523 err = (!(card->ext_csd.raw_partition_support ==
524 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
525 (card->ext_csd.raw_erased_mem_count ==
526 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
527 (card->ext_csd.rev ==
528 bw_ext_csd[EXT_CSD_REV]) &&
529 (card->ext_csd.raw_ext_csd_structure ==
530 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
531 (card->ext_csd.raw_card_type ==
532 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
533 (card->ext_csd.raw_s_a_timeout ==
534 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
535 (card->ext_csd.raw_hc_erase_gap_size ==
536 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
537 (card->ext_csd.raw_erase_timeout_mult ==
538 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
539 (card->ext_csd.raw_hc_erase_grp_size ==
540 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
541 (card->ext_csd.raw_sec_trim_mult ==
542 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
543 (card->ext_csd.raw_sec_erase_mult ==
544 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
545 (card->ext_csd.raw_sec_feature_support ==
546 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
547 (card->ext_csd.raw_trim_mult ==
548 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
549 (card->ext_csd.raw_sectors[0] ==
550 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
551 (card->ext_csd.raw_sectors[1] ==
552 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
553 (card->ext_csd.raw_sectors[2] ==
554 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
555 (card->ext_csd.raw_sectors[3] ==
556 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
557 if (err)
558 err = -EINVAL;
559
560 out:
561 mmc_free_ext_csd(bw_ext_csd);
562 return err;
563 }
564
565 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
566 card->raw_cid[2], card->raw_cid[3]);
567 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
568 card->raw_csd[2], card->raw_csd[3]);
569 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
570 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
571 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
572 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
573 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
574 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
575 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
576 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
577 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
578 MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
579 card->ext_csd.enhanced_area_offset);
580 MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
581
582 static struct attribute *mmc_std_attrs[] = {
583 &dev_attr_cid.attr,
584 &dev_attr_csd.attr,
585 &dev_attr_date.attr,
586 &dev_attr_erase_size.attr,
587 &dev_attr_preferred_erase_size.attr,
588 &dev_attr_fwrev.attr,
589 &dev_attr_hwrev.attr,
590 &dev_attr_manfid.attr,
591 &dev_attr_name.attr,
592 &dev_attr_oemid.attr,
593 &dev_attr_serial.attr,
594 &dev_attr_enhanced_area_offset.attr,
595 &dev_attr_enhanced_area_size.attr,
596 NULL,
597 };
598
599 static struct attribute_group mmc_std_attr_group = {
600 .attrs = mmc_std_attrs,
601 };
602
603 static const struct attribute_group *mmc_attr_groups[] = {
604 &mmc_std_attr_group,
605 NULL,
606 };
607
608 static struct device_type mmc_type = {
609 .groups = mmc_attr_groups,
610 };
611
612 /*
613 * Select the PowerClass for the current bus width
614 * If power class is defined for 4/8 bit bus in the
615 * extended CSD register, select it by executing the
616 * mmc_switch command.
617 */
618 static int mmc_select_powerclass(struct mmc_card *card,
619 unsigned int bus_width, u8 *ext_csd)
620 {
621 int err = 0;
622 unsigned int pwrclass_val;
623 unsigned int index = 0;
624 struct mmc_host *host;
625
626 BUG_ON(!card);
627
628 host = card->host;
629 BUG_ON(!host);
630
631 if (ext_csd == NULL)
632 return 0;
633
634 /* Power class selection is supported for versions >= 4.0 */
635 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
636 return 0;
637
638 /* Power class values are defined only for 4/8 bit bus */
639 if (bus_width == EXT_CSD_BUS_WIDTH_1)
640 return 0;
641
642 switch (1 << host->ios.vdd) {
643 case MMC_VDD_165_195:
644 if (host->ios.clock <= 26000000)
645 index = EXT_CSD_PWR_CL_26_195;
646 else if (host->ios.clock <= 52000000)
647 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
648 EXT_CSD_PWR_CL_52_195 :
649 EXT_CSD_PWR_CL_DDR_52_195;
650 else if (host->ios.clock <= 200000000)
651 index = EXT_CSD_PWR_CL_200_195;
652 break;
653 case MMC_VDD_32_33:
654 case MMC_VDD_33_34:
655 case MMC_VDD_34_35:
656 case MMC_VDD_35_36:
657 if (host->ios.clock <= 26000000)
658 index = EXT_CSD_PWR_CL_26_360;
659 else if (host->ios.clock <= 52000000)
660 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
661 EXT_CSD_PWR_CL_52_360 :
662 EXT_CSD_PWR_CL_DDR_52_360;
663 else if (host->ios.clock <= 200000000)
664 index = EXT_CSD_PWR_CL_200_360;
665 break;
666 default:
667 pr_warning("%s: Voltage range not supported "
668 "for power class.\n", mmc_hostname(host));
669 return -EINVAL;
670 }
671
672 pwrclass_val = ext_csd[index];
673
674 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
675 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
676 EXT_CSD_PWR_CL_8BIT_SHIFT;
677 else
678 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
679 EXT_CSD_PWR_CL_4BIT_SHIFT;
680
681 /* If the power class is different from the default value */
682 if (pwrclass_val > 0) {
683 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
684 EXT_CSD_POWER_CLASS,
685 pwrclass_val,
686 card->ext_csd.generic_cmd6_time);
687 }
688
689 return err;
690 }
691
692 /*
693 * Handle the detection and initialisation of a card.
694 *
695 * In the case of a resume, "oldcard" will contain the card
696 * we're trying to reinitialise.
697 */
698 static int mmc_init_card(struct mmc_host *host, u32 ocr,
699 struct mmc_card *oldcard)
700 {
701 struct mmc_card *card;
702 int err, ddr = 0;
703 u32 cid[4];
704 unsigned int max_dtr;
705 u32 rocr;
706 u8 *ext_csd = NULL;
707
708 BUG_ON(!host);
709 WARN_ON(!host->claimed);
710
711 /* Set correct bus mode for MMC before attempting init */
712 if (!mmc_host_is_spi(host))
713 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
714
715 /*
716 * Since we're changing the OCR value, we seem to
717 * need to tell some cards to go back to the idle
718 * state. We wait 1ms to give cards time to
719 * respond.
720 * mmc_go_idle is needed for eMMC that are asleep
721 */
722 mmc_go_idle(host);
723
724 /* The extra bit indicates that we support high capacity */
725 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
726 if (err)
727 goto err;
728
729 /*
730 * For SPI, enable CRC as appropriate.
731 */
732 if (mmc_host_is_spi(host)) {
733 err = mmc_spi_set_crc(host, use_spi_crc);
734 if (err)
735 goto err;
736 }
737
738 /*
739 * Fetch CID from card.
740 */
741 if (mmc_host_is_spi(host))
742 err = mmc_send_cid(host, cid);
743 else
744 err = mmc_all_send_cid(host, cid);
745 if (err)
746 goto err;
747
748 if (oldcard) {
749 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
750 err = -ENOENT;
751 goto err;
752 }
753
754 card = oldcard;
755 } else {
756 /*
757 * Allocate card structure.
758 */
759 card = mmc_alloc_card(host, &mmc_type);
760 if (IS_ERR(card)) {
761 err = PTR_ERR(card);
762 goto err;
763 }
764
765 card->type = MMC_TYPE_MMC;
766 card->rca = 1;
767 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
768 }
769
770 /*
771 * For native busses: set card RCA and quit open drain mode.
772 */
773 if (!mmc_host_is_spi(host)) {
774 err = mmc_set_relative_addr(card);
775 if (err)
776 goto free_card;
777
778 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
779 }
780
781 if (!oldcard) {
782 /*
783 * Fetch CSD from card.
784 */
785 err = mmc_send_csd(card, card->raw_csd);
786 if (err)
787 goto free_card;
788
789 err = mmc_decode_csd(card);
790 if (err)
791 goto free_card;
792 err = mmc_decode_cid(card);
793 if (err)
794 goto free_card;
795 }
796
797 /*
798 * Select card, as all following commands rely on that.
799 */
800 if (!mmc_host_is_spi(host)) {
801 err = mmc_select_card(card);
802 if (err)
803 goto free_card;
804 }
805
806 if (!oldcard) {
807 /*
808 * Fetch and process extended CSD.
809 */
810
811 err = mmc_get_ext_csd(card, &ext_csd);
812 if (err)
813 goto free_card;
814 err = mmc_read_ext_csd(card, ext_csd);
815 if (err)
816 goto free_card;
817
818 /* If doing byte addressing, check if required to do sector
819 * addressing. Handle the case of <2GB cards needing sector
820 * addressing. See section 8.1 JEDEC Standard JED84-A441;
821 * ocr register has bit 30 set for sector addressing.
822 */
823 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
824 mmc_card_set_blockaddr(card);
825
826 /* Erase size depends on CSD and Extended CSD */
827 mmc_set_erase_size(card);
828 }
829
830 /*
831 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
832 * bit. This bit will be lost every time after a reset or power off.
833 */
834 if (card->ext_csd.enhanced_area_en) {
835 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
836 EXT_CSD_ERASE_GROUP_DEF, 1,
837 card->ext_csd.generic_cmd6_time);
838
839 if (err && err != -EBADMSG)
840 goto free_card;
841
842 if (err) {
843 err = 0;
844 /*
845 * Just disable enhanced area off & sz
846 * will try to enable ERASE_GROUP_DEF
847 * during next time reinit
848 */
849 card->ext_csd.enhanced_area_offset = -EINVAL;
850 card->ext_csd.enhanced_area_size = -EINVAL;
851 } else {
852 card->ext_csd.erase_group_def = 1;
853 /*
854 * enable ERASE_GRP_DEF successfully.
855 * This will affect the erase size, so
856 * here need to reset erase size
857 */
858 mmc_set_erase_size(card);
859 }
860 }
861
862 /*
863 * Ensure eMMC user default partition is enabled
864 */
865 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
866 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
867 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
868 card->ext_csd.part_config,
869 card->ext_csd.part_time);
870 if (err && err != -EBADMSG)
871 goto free_card;
872 }
873
874 /*
875 * If the host supports the power_off_notify capability then
876 * set the notification byte in the ext_csd register of device
877 */
878 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
879 (card->ext_csd.rev >= 6)) {
880 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
881 EXT_CSD_POWER_OFF_NOTIFICATION,
882 EXT_CSD_POWER_ON,
883 card->ext_csd.generic_cmd6_time);
884 if (err && err != -EBADMSG)
885 goto free_card;
886
887 /*
888 * The err can be -EBADMSG or 0,
889 * so check for success and update the flag
890 */
891 if (!err)
892 card->poweroff_notify_state = MMC_POWERED_ON;
893 }
894
895 /*
896 * Activate high speed (if supported)
897 */
898 if ((card->ext_csd.hs_max_dtr != 0) &&
899 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
900 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
901 EXT_CSD_HS_TIMING, 1,
902 card->ext_csd.generic_cmd6_time);
903 if (err && err != -EBADMSG)
904 goto free_card;
905
906 if (err) {
907 pr_warning("%s: switch to highspeed failed\n",
908 mmc_hostname(card->host));
909 err = 0;
910 } else {
911 mmc_card_set_highspeed(card);
912 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
913 }
914 }
915
916 /*
917 * Enable HPI feature (if supported)
918 */
919 if (card->ext_csd.hpi) {
920 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
921 EXT_CSD_HPI_MGMT, 1, 0);
922 if (err && err != -EBADMSG)
923 goto free_card;
924 if (err) {
925 pr_warning("%s: Enabling HPI failed\n",
926 mmc_hostname(card->host));
927 err = 0;
928 } else
929 card->ext_csd.hpi_en = 1;
930 }
931
932 /*
933 * Compute bus speed.
934 */
935 max_dtr = (unsigned int)-1;
936
937 if (mmc_card_highspeed(card)) {
938 if (max_dtr > card->ext_csd.hs_max_dtr)
939 max_dtr = card->ext_csd.hs_max_dtr;
940 } else if (max_dtr > card->csd.max_dtr) {
941 max_dtr = card->csd.max_dtr;
942 }
943
944 mmc_set_clock(host, max_dtr);
945
946 /*
947 * Indicate DDR mode (if supported).
948 */
949 if (mmc_card_highspeed(card)) {
950 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
951 && ((host->caps & (MMC_CAP_1_8V_DDR |
952 MMC_CAP_UHS_DDR50))
953 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
954 ddr = MMC_1_8V_DDR_MODE;
955 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
956 && ((host->caps & (MMC_CAP_1_2V_DDR |
957 MMC_CAP_UHS_DDR50))
958 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
959 ddr = MMC_1_2V_DDR_MODE;
960 }
961
962 /*
963 * Activate wide bus and DDR (if supported).
964 */
965 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
966 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
967 static unsigned ext_csd_bits[][2] = {
968 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
969 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
970 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
971 };
972 static unsigned bus_widths[] = {
973 MMC_BUS_WIDTH_8,
974 MMC_BUS_WIDTH_4,
975 MMC_BUS_WIDTH_1
976 };
977 unsigned idx, bus_width = 0;
978
979 if (host->caps & MMC_CAP_8_BIT_DATA)
980 idx = 0;
981 else
982 idx = 1;
983 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
984 bus_width = bus_widths[idx];
985 if (bus_width == MMC_BUS_WIDTH_1)
986 ddr = 0; /* no DDR for 1-bit width */
987 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
988 ext_csd);
989 if (err)
990 pr_err("%s: power class selection to "
991 "bus width %d failed\n",
992 mmc_hostname(card->host),
993 1 << bus_width);
994
995 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
996 EXT_CSD_BUS_WIDTH,
997 ext_csd_bits[idx][0],
998 card->ext_csd.generic_cmd6_time);
999 if (!err) {
1000 mmc_set_bus_width(card->host, bus_width);
1001
1002 /*
1003 * If controller can't handle bus width test,
1004 * compare ext_csd previously read in 1 bit mode
1005 * against ext_csd at new bus width
1006 */
1007 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
1008 err = mmc_compare_ext_csds(card,
1009 bus_width);
1010 else
1011 err = mmc_bus_test(card, bus_width);
1012 if (!err)
1013 break;
1014 }
1015 }
1016
1017 if (!err && ddr) {
1018 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1019 ext_csd);
1020 if (err)
1021 pr_err("%s: power class selection to "
1022 "bus width %d ddr %d failed\n",
1023 mmc_hostname(card->host),
1024 1 << bus_width, ddr);
1025
1026 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1027 EXT_CSD_BUS_WIDTH,
1028 ext_csd_bits[idx][1],
1029 card->ext_csd.generic_cmd6_time);
1030 }
1031 if (err) {
1032 pr_warning("%s: switch to bus width %d ddr %d "
1033 "failed\n", mmc_hostname(card->host),
1034 1 << bus_width, ddr);
1035 goto free_card;
1036 } else if (ddr) {
1037 /*
1038 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1039 * signaling.
1040 *
1041 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1042 *
1043 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1044 * in the JEDEC spec for DDR.
1045 *
1046 * Do not force change in vccq since we are obviously
1047 * working and no change to vccq is needed.
1048 *
1049 * WARNING: eMMC rules are NOT the same as SD DDR
1050 */
1051 if (ddr == MMC_1_2V_DDR_MODE) {
1052 err = mmc_set_signal_voltage(host,
1053 MMC_SIGNAL_VOLTAGE_120, 0);
1054 if (err)
1055 goto err;
1056 }
1057 mmc_card_set_ddr_mode(card);
1058 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1059 mmc_set_bus_width(card->host, bus_width);
1060 }
1061 }
1062
1063 /*
1064 * If cache size is higher than 0, this indicates
1065 * the existence of cache and it can be turned on.
1066 */
1067 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1068 card->ext_csd.cache_size > 0) {
1069 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1070 EXT_CSD_CACHE_CTRL, 1, 0);
1071 if (err && err != -EBADMSG)
1072 goto free_card;
1073
1074 /*
1075 * Only if no error, cache is turned on successfully.
1076 */
1077 card->ext_csd.cache_ctrl = err ? 0 : 1;
1078 }
1079
1080 if (!oldcard)
1081 host->card = card;
1082
1083 mmc_free_ext_csd(ext_csd);
1084 return 0;
1085
1086 free_card:
1087 if (!oldcard)
1088 mmc_remove_card(card);
1089 err:
1090 mmc_free_ext_csd(ext_csd);
1091
1092 return err;
1093 }
1094
1095 /*
1096 * Host is being removed. Free up the current card.
1097 */
1098 static void mmc_remove(struct mmc_host *host)
1099 {
1100 BUG_ON(!host);
1101 BUG_ON(!host->card);
1102
1103 mmc_remove_card(host->card);
1104 host->card = NULL;
1105 }
1106
1107 /*
1108 * Card detection callback from host.
1109 */
1110 static void mmc_detect(struct mmc_host *host)
1111 {
1112 int err;
1113
1114 BUG_ON(!host);
1115 BUG_ON(!host->card);
1116
1117 mmc_claim_host(host);
1118
1119 /*
1120 * Just check if our card has been removed.
1121 */
1122 err = mmc_send_status(host->card, NULL);
1123
1124 mmc_release_host(host);
1125
1126 if (err) {
1127 mmc_remove(host);
1128
1129 mmc_claim_host(host);
1130 mmc_detach_bus(host);
1131 mmc_power_off(host);
1132 mmc_release_host(host);
1133 }
1134 }
1135
1136 /*
1137 * Suspend callback from host.
1138 */
1139 static int mmc_suspend(struct mmc_host *host)
1140 {
1141 int err = 0;
1142
1143 BUG_ON(!host);
1144 BUG_ON(!host->card);
1145
1146 mmc_claim_host(host);
1147 if (mmc_card_can_sleep(host))
1148 err = mmc_card_sleep(host);
1149 else if (!mmc_host_is_spi(host))
1150 mmc_deselect_cards(host);
1151 host->card->state &= ~MMC_STATE_HIGHSPEED;
1152 mmc_release_host(host);
1153
1154 return err;
1155 }
1156
1157 /*
1158 * Resume callback from host.
1159 *
1160 * This function tries to determine if the same card is still present
1161 * and, if so, restore all state to it.
1162 */
1163 static int mmc_resume(struct mmc_host *host)
1164 {
1165 int err;
1166
1167 BUG_ON(!host);
1168 BUG_ON(!host->card);
1169
1170 mmc_claim_host(host);
1171 err = mmc_init_card(host, host->ocr, host->card);
1172 mmc_release_host(host);
1173
1174 return err;
1175 }
1176
1177 static int mmc_power_restore(struct mmc_host *host)
1178 {
1179 int ret;
1180
1181 host->card->state &= ~MMC_STATE_HIGHSPEED;
1182 mmc_claim_host(host);
1183 ret = mmc_init_card(host, host->ocr, host->card);
1184 mmc_release_host(host);
1185
1186 return ret;
1187 }
1188
1189 static int mmc_sleep(struct mmc_host *host)
1190 {
1191 struct mmc_card *card = host->card;
1192 int err = -ENOSYS;
1193
1194 if (card && card->ext_csd.rev >= 3) {
1195 err = mmc_card_sleepawake(host, 1);
1196 if (err < 0)
1197 pr_debug("%s: Error %d while putting card into sleep",
1198 mmc_hostname(host), err);
1199 }
1200
1201 return err;
1202 }
1203
1204 static int mmc_awake(struct mmc_host *host)
1205 {
1206 struct mmc_card *card = host->card;
1207 int err = -ENOSYS;
1208
1209 if (card && card->ext_csd.rev >= 3) {
1210 err = mmc_card_sleepawake(host, 0);
1211 if (err < 0)
1212 pr_debug("%s: Error %d while awaking sleeping card",
1213 mmc_hostname(host), err);
1214 }
1215
1216 return err;
1217 }
1218
1219 static const struct mmc_bus_ops mmc_ops = {
1220 .awake = mmc_awake,
1221 .sleep = mmc_sleep,
1222 .remove = mmc_remove,
1223 .detect = mmc_detect,
1224 .suspend = NULL,
1225 .resume = NULL,
1226 .power_restore = mmc_power_restore,
1227 };
1228
1229 static const struct mmc_bus_ops mmc_ops_unsafe = {
1230 .awake = mmc_awake,
1231 .sleep = mmc_sleep,
1232 .remove = mmc_remove,
1233 .detect = mmc_detect,
1234 .suspend = mmc_suspend,
1235 .resume = mmc_resume,
1236 .power_restore = mmc_power_restore,
1237 };
1238
1239 static void mmc_attach_bus_ops(struct mmc_host *host)
1240 {
1241 const struct mmc_bus_ops *bus_ops;
1242
1243 if (!mmc_card_is_removable(host))
1244 bus_ops = &mmc_ops_unsafe;
1245 else
1246 bus_ops = &mmc_ops;
1247 mmc_attach_bus(host, bus_ops);
1248 }
1249
1250 /*
1251 * Starting point for MMC card init.
1252 */
1253 int mmc_attach_mmc(struct mmc_host *host)
1254 {
1255 int err;
1256 u32 ocr;
1257
1258 BUG_ON(!host);
1259 WARN_ON(!host->claimed);
1260
1261 /* Set correct bus mode for MMC before attempting attach */
1262 if (!mmc_host_is_spi(host))
1263 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1264
1265 err = mmc_send_op_cond(host, 0, &ocr);
1266 if (err)
1267 return err;
1268
1269 mmc_attach_bus_ops(host);
1270 if (host->ocr_avail_mmc)
1271 host->ocr_avail = host->ocr_avail_mmc;
1272
1273 /*
1274 * We need to get OCR a different way for SPI.
1275 */
1276 if (mmc_host_is_spi(host)) {
1277 err = mmc_spi_read_ocr(host, 1, &ocr);
1278 if (err)
1279 goto err;
1280 }
1281
1282 /*
1283 * Sanity check the voltages that the card claims to
1284 * support.
1285 */
1286 if (ocr & 0x7F) {
1287 pr_warning("%s: card claims to support voltages "
1288 "below the defined range. These will be ignored.\n",
1289 mmc_hostname(host));
1290 ocr &= ~0x7F;
1291 }
1292
1293 host->ocr = mmc_select_voltage(host, ocr);
1294
1295 /*
1296 * Can we support the voltage of the card?
1297 */
1298 if (!host->ocr) {
1299 err = -EINVAL;
1300 goto err;
1301 }
1302
1303 /*
1304 * Detect and init the card.
1305 */
1306 err = mmc_init_card(host, host->ocr, NULL);
1307 if (err)
1308 goto err;
1309
1310 mmc_release_host(host);
1311 err = mmc_add_card(host->card);
1312 mmc_claim_host(host);
1313 if (err)
1314 goto remove_card;
1315
1316 return 0;
1317
1318 remove_card:
1319 mmc_release_host(host);
1320 mmc_remove_card(host->card);
1321 mmc_claim_host(host);
1322 host->card = NULL;
1323 err:
1324 mmc_detach_bus(host);
1325
1326 pr_err("%s: error %d whilst initialising MMC card\n",
1327 mmc_hostname(host), err);
1328
1329 return err;
1330 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree