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Pierre Ossman7ea239d2006-12-31 00:11:32 +01001/*
Pierre Ossman70f10482007-07-11 20:04:50 +02002 * linux/drivers/mmc/core/mmc.c
Pierre Ossman7ea239d2006-12-31 00:11:32 +01003 *
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Pierre Ossman7ea239d2006-12-31 00:11:32 +010015
16#include <linux/mmc/host.h>
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19
20#include "core.h"
Pierre Ossman4101c162007-05-19 13:39:01 +020021#include "bus.h"
Pierre Ossman7ea239d2006-12-31 00:11:32 +010022#include "mmc_ops.h"
Philip Rakity4c4cb172011-05-13 11:17:18 +053023#include "sd_ops.h"
Pierre Ossman7ea239d2006-12-31 00:11:32 +010024
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 */
Pierre Ossmanbd766312007-05-01 16:11:57 +020061static int mmc_decode_cid(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +010062{
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:
Pierre Ossmanfacba912007-07-24 21:53:43 +0200104 printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100105 mmc_hostname(card->host), card->csd.mmca_vsn);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200106 return -EINVAL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100107 }
Pierre Ossmanbd766312007-05-01 16:11:57 +0200108
109 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100110}
111
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700112static 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
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100122/*
123 * Given a 128-bit response, decode to our card CSD structure.
124 */
Pierre Ossmanbd766312007-05-01 16:11:57 +0200125static int mmc_decode_csd(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100126{
127 struct mmc_csd *csd = &card->csd;
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700128 unsigned int e, m, a, b;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100129 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.
Kyungmin Park6da24b72010-08-10 18:01:36 -0700134 * We also support eMMC v4.4 & v4.41.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100135 */
Kyungmin Park6da24b72010-08-10 18:01:36 -0700136 csd->structure = UNSTUFF_BITS(resp, 126, 2);
137 if (csd->structure == 0) {
Pierre Ossmanfacba912007-07-24 21:53:43 +0200138 printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
Kyungmin Park6da24b72010-08-10 18:01:36 -0700139 mmc_hostname(card->host), csd->structure);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200140 return -EINVAL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100141 }
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);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200165
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700166 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
Pierre Ossmanbd766312007-05-01 16:11:57 +0200173 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100174}
175
176/*
Philip Rakity08ee80c2011-05-24 18:14:58 -0700177 * Read extended CSD.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100178 */
Philip Rakity08ee80c2011-05-24 18:14:58 -0700179static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100180{
181 int err;
182 u8 *ext_csd;
183
184 BUG_ON(!card);
Philip Rakity08ee80c2011-05-24 18:14:58 -0700185 BUG_ON(!new_ext_csd);
186
187 *new_ext_csd = NULL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100188
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100189 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
Pierre Ossman17b04292007-07-22 22:18:46 +0200190 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100191
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 "
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200199 "receive the ext_csd.\n", mmc_hostname(card->host));
Pierre Ossman17b04292007-07-22 22:18:46 +0200200 return -ENOMEM;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100201 }
202
203 err = mmc_send_ext_csd(card, ext_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +0200204 if (err) {
Philip Rakity08ee80c2011-05-24 18:14:58 -0700205 kfree(ext_csd);
206 *new_ext_csd = NULL;
207
Wolfgang Mueesd08ebed2009-09-22 16:45:26 -0700208 /* 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))
Philip Rakity08ee80c2011-05-24 18:14:58 -0700213 return err;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200214
215 /*
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100216 * 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));
Pierre Ossman17b04292007-07-22 22:18:46 +0200229 err = 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100230 }
Philip Rakity08ee80c2011-05-24 18:14:58 -0700231 } else
232 *new_ext_csd = ext_csd;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200233
Philip Rakity08ee80c2011-05-24 18:14:58 -0700234 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;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100248
Kyungmin Park6da24b72010-08-10 18:01:36 -0700249 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700250 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
Kyungmin Park6da24b72010-08-10 18:01:36 -0700251 if (card->csd.structure == 3) {
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700252 if (card->ext_csd.raw_ext_csd_structure > 2) {
Kyungmin Park6da24b72010-08-10 18:01:36 -0700253 printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
254 "version %d\n", mmc_hostname(card->host),
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700255 card->ext_csd.raw_ext_csd_structure);
Kyungmin Park6da24b72010-08-10 18:01:36 -0700256 err = -EINVAL;
257 goto out;
258 }
259 }
260
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700261 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
Kyungmin Park0d373482011-07-26 17:12:37 +0900262 if (card->ext_csd.rev > 6) {
Kyungmin Park6da24b72010-08-10 18:01:36 -0700263 printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
264 mmc_hostname(card->host), card->ext_csd.rev);
Florin Malita00cedfa2007-10-13 12:27:20 -0400265 err = -EINVAL;
266 goto out;
Pierre Ossmand7604d72007-07-23 00:34:07 +0200267 }
268
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700269 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];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700273 if (card->ext_csd.rev >= 2) {
Pierre Ossmand7604d72007-07-23 00:34:07 +0200274 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;
Hanumath Prasadfc8a0982010-08-10 18:01:45 -0700279
280 /* Cards with density > 2GiB are sector addressed */
281 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
Pierre Ossmand7604d72007-07-23 00:34:07 +0200282 mmc_card_set_blockaddr(card);
283 }
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700284 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
Adrian Hunter7198f3c2010-03-23 13:35:40 -0700285 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400286 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;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100301 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));
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100312 }
313
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700314 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];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700319 if (card->ext_csd.rev >= 3) {
320 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
Andrei Warkentin371a6892011-04-11 18:10:25 -0500321 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];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700325
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];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700330 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;
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500336
337 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
Andrei Warkentin371a6892011-04-11 18:10:25 -0500338
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;
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700344 }
345
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700346 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];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700356 if (card->ext_csd.rev >= 4) {
Chuanxiao Dong709de992011-01-22 04:09:41 +0800357 /*
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 */
Andrei Warkentin8fe21152011-09-24 12:12:30 -0400362 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
Chuanxiao Dong709de992011-01-22 04:09:41 +0800363 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700364 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
Chuanxiao Dong709de992011-01-22 04:09:41 +0800365 u8 hc_erase_grp_sz =
366 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
367 u8 hc_wp_grp_sz =
368 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
369
370 card->ext_csd.enhanced_area_en = 1;
371 /*
372 * calculate the enhanced data area offset, in bytes
373 */
374 card->ext_csd.enhanced_area_offset =
375 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
376 (ext_csd[137] << 8) + ext_csd[136];
377 if (mmc_card_blockaddr(card))
378 card->ext_csd.enhanced_area_offset <<= 9;
379 /*
380 * calculate the enhanced data area size, in kilobytes
381 */
382 card->ext_csd.enhanced_area_size =
383 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
384 ext_csd[140];
385 card->ext_csd.enhanced_area_size *=
386 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
387 card->ext_csd.enhanced_area_size <<= 9;
388 } else {
389 /*
390 * If the enhanced area is not enabled, disable these
391 * device attributes.
392 */
393 card->ext_csd.enhanced_area_offset = -EINVAL;
394 card->ext_csd.enhanced_area_size = -EINVAL;
395 }
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700396 card->ext_csd.sec_trim_mult =
397 ext_csd[EXT_CSD_SEC_TRIM_MULT];
398 card->ext_csd.sec_erase_mult =
399 ext_csd[EXT_CSD_SEC_ERASE_MULT];
400 card->ext_csd.sec_feature_support =
401 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
402 card->ext_csd.trim_timeout = 300 *
403 ext_csd[EXT_CSD_TRIM_MULT];
404 }
405
Adrian Hunter02efa5a2011-08-29 16:42:11 +0300406 if (card->ext_csd.rev >= 5) {
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500407 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
Adrian Hunter02efa5a2011-08-29 16:42:11 +0300408 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
409 }
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500410
Kyungmin Parka3777a72011-10-18 09:34:04 +0900411 /* eMMC v4.5 or later */
412 if (card->ext_csd.rev >= 6)
413 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
414
Andrei Warkentin8fe21152011-09-24 12:12:30 -0400415 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700416 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
417 card->erased_byte = 0xFF;
418 else
419 card->erased_byte = 0x0;
420
Girish K S51abf162011-10-13 12:04:16 +0530421 if (card->ext_csd.rev >= 6) {
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900422 card->ext_csd.generic_cmd6_time = 10 *
423 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
Girish K S51abf162011-10-13 12:04:16 +0530424 card->ext_csd.power_off_longtime = 10 *
425 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
426 } else
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900427 card->ext_csd.generic_cmd6_time = 0;
428
Seungwon Jeonf8764902011-10-14 14:03:21 +0900429 card->ext_csd.cache_size =
430 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
431 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
432 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
433 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
434
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100435out:
Philip Rakity08ee80c2011-05-24 18:14:58 -0700436 return err;
437}
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100438
Philip Rakity08ee80c2011-05-24 18:14:58 -0700439static inline void mmc_free_ext_csd(u8 *ext_csd)
440{
441 kfree(ext_csd);
442}
443
444
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700445static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
Philip Rakity08ee80c2011-05-24 18:14:58 -0700446{
447 u8 *bw_ext_csd;
448 int err;
449
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700450 if (bus_width == MMC_BUS_WIDTH_1)
451 return 0;
Philip Rakity08ee80c2011-05-24 18:14:58 -0700452
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700453 err = mmc_get_ext_csd(card, &bw_ext_csd);
454
455 if (err || bw_ext_csd == NULL) {
Philip Rakity08ee80c2011-05-24 18:14:58 -0700456 if (bus_width != MMC_BUS_WIDTH_1)
457 err = -EINVAL;
458 goto out;
459 }
460
461 if (bus_width == MMC_BUS_WIDTH_1)
462 goto out;
463
464 /* only compare read only fields */
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700465 err = (!(card->ext_csd.raw_partition_support ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700466 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700467 (card->ext_csd.raw_erased_mem_count ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700468 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700469 (card->ext_csd.rev ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700470 bw_ext_csd[EXT_CSD_REV]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700471 (card->ext_csd.raw_ext_csd_structure ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700472 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700473 (card->ext_csd.raw_card_type ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700474 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700475 (card->ext_csd.raw_s_a_timeout ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700476 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700477 (card->ext_csd.raw_hc_erase_gap_size ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700478 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700479 (card->ext_csd.raw_erase_timeout_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700480 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700481 (card->ext_csd.raw_hc_erase_grp_size ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700482 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700483 (card->ext_csd.raw_sec_trim_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700484 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700485 (card->ext_csd.raw_sec_erase_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700486 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700487 (card->ext_csd.raw_sec_feature_support ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700488 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700489 (card->ext_csd.raw_trim_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700490 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700491 (card->ext_csd.raw_sectors[0] ==
492 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
493 (card->ext_csd.raw_sectors[1] ==
494 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
495 (card->ext_csd.raw_sectors[2] ==
496 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
497 (card->ext_csd.raw_sectors[3] ==
498 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
Philip Rakity08ee80c2011-05-24 18:14:58 -0700499 if (err)
500 err = -EINVAL;
501
502out:
503 mmc_free_ext_csd(bw_ext_csd);
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100504 return err;
505}
506
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100507MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
508 card->raw_cid[2], card->raw_cid[3]);
509MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
510 card->raw_csd[2], card->raw_csd[3]);
511MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700512MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
513MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100514MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
515MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
516MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
517MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
518MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
519MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
Chuanxiao Dong709de992011-01-22 04:09:41 +0800520MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
521 card->ext_csd.enhanced_area_offset);
522MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100523
524static struct attribute *mmc_std_attrs[] = {
525 &dev_attr_cid.attr,
526 &dev_attr_csd.attr,
527 &dev_attr_date.attr,
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700528 &dev_attr_erase_size.attr,
529 &dev_attr_preferred_erase_size.attr,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100530 &dev_attr_fwrev.attr,
531 &dev_attr_hwrev.attr,
532 &dev_attr_manfid.attr,
533 &dev_attr_name.attr,
534 &dev_attr_oemid.attr,
535 &dev_attr_serial.attr,
Chuanxiao Dong709de992011-01-22 04:09:41 +0800536 &dev_attr_enhanced_area_offset.attr,
537 &dev_attr_enhanced_area_size.attr,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100538 NULL,
539};
540
541static struct attribute_group mmc_std_attr_group = {
542 .attrs = mmc_std_attrs,
543};
544
David Brownella4dbd672009-06-24 10:06:31 -0700545static const struct attribute_group *mmc_attr_groups[] = {
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100546 &mmc_std_attr_group,
547 NULL,
548};
549
550static struct device_type mmc_type = {
551 .groups = mmc_attr_groups,
552};
553
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100554/*
Girish K Sd4674832011-09-23 20:41:47 +0530555 * Select the PowerClass for the current bus width
556 * If power class is defined for 4/8 bit bus in the
557 * extended CSD register, select it by executing the
558 * mmc_switch command.
559 */
560static int mmc_select_powerclass(struct mmc_card *card,
561 unsigned int bus_width, u8 *ext_csd)
562{
563 int err = 0;
564 unsigned int pwrclass_val;
565 unsigned int index = 0;
566 struct mmc_host *host;
567
568 BUG_ON(!card);
569
570 host = card->host;
571 BUG_ON(!host);
572
573 if (ext_csd == NULL)
574 return 0;
575
576 /* Power class selection is supported for versions >= 4.0 */
577 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
578 return 0;
579
580 /* Power class values are defined only for 4/8 bit bus */
581 if (bus_width == EXT_CSD_BUS_WIDTH_1)
582 return 0;
583
584 switch (1 << host->ios.vdd) {
585 case MMC_VDD_165_195:
586 if (host->ios.clock <= 26000000)
587 index = EXT_CSD_PWR_CL_26_195;
588 else if (host->ios.clock <= 52000000)
589 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
590 EXT_CSD_PWR_CL_52_195 :
591 EXT_CSD_PWR_CL_DDR_52_195;
592 else if (host->ios.clock <= 200000000)
593 index = EXT_CSD_PWR_CL_200_195;
594 break;
595 case MMC_VDD_32_33:
596 case MMC_VDD_33_34:
597 case MMC_VDD_34_35:
598 case MMC_VDD_35_36:
599 if (host->ios.clock <= 26000000)
600 index = EXT_CSD_PWR_CL_26_360;
601 else if (host->ios.clock <= 52000000)
602 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
603 EXT_CSD_PWR_CL_52_360 :
604 EXT_CSD_PWR_CL_DDR_52_360;
605 else if (host->ios.clock <= 200000000)
606 index = EXT_CSD_PWR_CL_200_360;
607 break;
608 default:
609 pr_warning("%s: Voltage range not supported "
610 "for power class.\n", mmc_hostname(host));
611 return -EINVAL;
612 }
613
614 pwrclass_val = ext_csd[index];
615
616 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
617 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
618 EXT_CSD_PWR_CL_8BIT_SHIFT;
619 else
620 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
621 EXT_CSD_PWR_CL_4BIT_SHIFT;
622
623 /* If the power class is different from the default value */
624 if (pwrclass_val > 0) {
625 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
626 EXT_CSD_POWER_CLASS,
627 pwrclass_val,
628 0);
629 }
630
631 return err;
632}
633
634/*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200635 * Handle the detection and initialisation of a card.
636 *
Deepak Saxena87693922008-06-16 19:20:57 -0700637 * In the case of a resume, "oldcard" will contain the card
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200638 * we're trying to reinitialise.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100639 */
Pierre Ossman8c75dea2007-05-19 16:14:43 +0200640static int mmc_init_card(struct mmc_host *host, u32 ocr,
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200641 struct mmc_card *oldcard)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100642{
643 struct mmc_card *card;
Philip Rakity25d5c692010-11-07 16:22:28 -0500644 int err, ddr = 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100645 u32 cid[4];
646 unsigned int max_dtr;
Philip Rakityb676f032011-02-13 23:13:09 -0800647 u32 rocr;
Philip Rakity08ee80c2011-05-24 18:14:58 -0700648 u8 *ext_csd = NULL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100649
650 BUG_ON(!host);
Pierre Ossmand84075c82007-08-09 13:23:56 +0200651 WARN_ON(!host->claimed);
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100652
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100653 /*
654 * Since we're changing the OCR value, we seem to
655 * need to tell some cards to go back to the idle
656 * state. We wait 1ms to give cards time to
657 * respond.
658 */
659 mmc_go_idle(host);
660
661 /* The extra bit indicates that we support high capacity */
Philip Rakityb676f032011-02-13 23:13:09 -0800662 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
Pierre Ossman17b04292007-07-22 22:18:46 +0200663 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200664 goto err;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100665
666 /*
David Brownellaf517152007-08-08 09:11:32 -0700667 * For SPI, enable CRC as appropriate.
668 */
669 if (mmc_host_is_spi(host)) {
670 err = mmc_spi_set_crc(host, use_spi_crc);
671 if (err)
672 goto err;
673 }
674
675 /*
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100676 * Fetch CID from card.
677 */
David Brownellaf517152007-08-08 09:11:32 -0700678 if (mmc_host_is_spi(host))
679 err = mmc_send_cid(host, cid);
680 else
681 err = mmc_all_send_cid(host, cid);
Pierre Ossman17b04292007-07-22 22:18:46 +0200682 if (err)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100683 goto err;
684
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200685 if (oldcard) {
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200686 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
687 err = -ENOENT;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200688 goto err;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200689 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100690
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200691 card = oldcard;
692 } else {
693 /*
694 * Allocate card structure.
695 */
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100696 card = mmc_alloc_card(host, &mmc_type);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200697 if (IS_ERR(card)) {
698 err = PTR_ERR(card);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200699 goto err;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200700 }
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200701
702 card->type = MMC_TYPE_MMC;
703 card->rca = 1;
704 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
705 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100706
707 /*
David Brownellaf517152007-08-08 09:11:32 -0700708 * For native busses: set card RCA and quit open drain mode.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100709 */
David Brownellaf517152007-08-08 09:11:32 -0700710 if (!mmc_host_is_spi(host)) {
711 err = mmc_set_relative_addr(card);
712 if (err)
713 goto free_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100714
David Brownellaf517152007-08-08 09:11:32 -0700715 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
716 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100717
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200718 if (!oldcard) {
719 /*
720 * Fetch CSD from card.
721 */
722 err = mmc_send_csd(card, card->raw_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +0200723 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200724 goto free_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100725
Pierre Ossmanbd766312007-05-01 16:11:57 +0200726 err = mmc_decode_csd(card);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200727 if (err)
Pierre Ossmanbd766312007-05-01 16:11:57 +0200728 goto free_card;
729 err = mmc_decode_cid(card);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200730 if (err)
Pierre Ossmanbd766312007-05-01 16:11:57 +0200731 goto free_card;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200732 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100733
734 /*
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200735 * Select card, as all following commands rely on that.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100736 */
David Brownellaf517152007-08-08 09:11:32 -0700737 if (!mmc_host_is_spi(host)) {
738 err = mmc_select_card(card);
739 if (err)
740 goto free_card;
741 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100742
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200743 if (!oldcard) {
744 /*
David Brownellaf517152007-08-08 09:11:32 -0700745 * Fetch and process extended CSD.
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200746 */
Philip Rakity08ee80c2011-05-24 18:14:58 -0700747
748 err = mmc_get_ext_csd(card, &ext_csd);
749 if (err)
750 goto free_card;
751 err = mmc_read_ext_csd(card, ext_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +0200752 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200753 goto free_card;
Philip Rakityb676f032011-02-13 23:13:09 -0800754
755 /* If doing byte addressing, check if required to do sector
756 * addressing. Handle the case of <2GB cards needing sector
757 * addressing. See section 8.1 JEDEC Standard JED84-A441;
758 * ocr register has bit 30 set for sector addressing.
759 */
760 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
761 mmc_card_set_blockaddr(card);
762
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700763 /* Erase size depends on CSD and Extended CSD */
764 mmc_set_erase_size(card);
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -0700765
766 if (card->ext_csd.sectors && (rocr & MMC_CARD_SECTOR_ADDR))
767 mmc_card_set_blockaddr(card);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200768 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100769
770 /*
Chuanxiao Dong709de992011-01-22 04:09:41 +0800771 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300772 * bit. This bit will be lost every time after a reset or power off.
Chuanxiao Dong709de992011-01-22 04:09:41 +0800773 */
774 if (card->ext_csd.enhanced_area_en) {
775 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900776 EXT_CSD_ERASE_GROUP_DEF, 1,
777 card->ext_csd.generic_cmd6_time);
Chuanxiao Dong709de992011-01-22 04:09:41 +0800778
779 if (err && err != -EBADMSG)
780 goto free_card;
781
782 if (err) {
783 err = 0;
784 /*
785 * Just disable enhanced area off & sz
786 * will try to enable ERASE_GROUP_DEF
787 * during next time reinit
788 */
789 card->ext_csd.enhanced_area_offset = -EINVAL;
790 card->ext_csd.enhanced_area_size = -EINVAL;
791 } else {
792 card->ext_csd.erase_group_def = 1;
793 /*
794 * enable ERASE_GRP_DEF successfully.
795 * This will affect the erase size, so
796 * here need to reset erase size
797 */
798 mmc_set_erase_size(card);
799 }
800 }
801
802 /*
Philip Rakity41e2a482011-03-19 14:10:33 -0400803 * Ensure eMMC user default partition is enabled
804 */
Andrei Warkentin371a6892011-04-11 18:10:25 -0500805 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
806 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
807 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
808 card->ext_csd.part_config,
809 card->ext_csd.part_time);
810 if (err && err != -EBADMSG)
811 goto free_card;
Philip Rakity41e2a482011-03-19 14:10:33 -0400812 }
813
814 /*
Girish K S51abf162011-10-13 12:04:16 +0530815 * If the host supports the power_off_notify capability then
816 * set the notification byte in the ext_csd register of device
817 */
818 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
819 (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) {
820 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
821 EXT_CSD_POWER_OFF_NOTIFICATION,
822 EXT_CSD_POWER_ON,
823 card->ext_csd.generic_cmd6_time);
824 if (err && err != -EBADMSG)
825 goto free_card;
826 }
827
828 if (!err)
829 card->poweroff_notify_state = MMC_POWERED_ON;
830
831 /*
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200832 * Activate high speed (if supported)
833 */
834 if ((card->ext_csd.hs_max_dtr != 0) &&
835 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
836 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900837 EXT_CSD_HS_TIMING, 1,
838 card->ext_csd.generic_cmd6_time);
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700839 if (err && err != -EBADMSG)
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200840 goto free_card;
841
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700842 if (err) {
843 printk(KERN_WARNING "%s: switch to highspeed failed\n",
844 mmc_hostname(card->host));
845 err = 0;
846 } else {
847 mmc_card_set_highspeed(card);
848 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
849 }
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200850 }
851
852 /*
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100853 * Compute bus speed.
854 */
855 max_dtr = (unsigned int)-1;
856
857 if (mmc_card_highspeed(card)) {
858 if (max_dtr > card->ext_csd.hs_max_dtr)
859 max_dtr = card->ext_csd.hs_max_dtr;
860 } else if (max_dtr > card->csd.max_dtr) {
861 max_dtr = card->csd.max_dtr;
862 }
863
864 mmc_set_clock(host, max_dtr);
865
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200866 /*
Adrian Hunter0f8d8ea2010-08-24 13:20:26 +0300867 * Indicate DDR mode (if supported).
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400868 */
869 if (mmc_card_highspeed(card)) {
870 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
Philip Rakity4c4cb172011-05-13 11:17:18 +0530871 && ((host->caps & (MMC_CAP_1_8V_DDR |
872 MMC_CAP_UHS_DDR50))
873 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
Adrian Hunter49e3b5a2010-10-11 12:43:50 +0300874 ddr = MMC_1_8V_DDR_MODE;
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400875 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
Philip Rakity4c4cb172011-05-13 11:17:18 +0530876 && ((host->caps & (MMC_CAP_1_2V_DDR |
877 MMC_CAP_UHS_DDR50))
878 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
Adrian Hunter49e3b5a2010-10-11 12:43:50 +0300879 ddr = MMC_1_2V_DDR_MODE;
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400880 }
881
882 /*
Adrian Hunter0f8d8ea2010-08-24 13:20:26 +0300883 * Activate wide bus and DDR (if supported).
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200884 */
885 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +0200886 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
Aries Lee22113ef2010-12-15 08:14:24 +0100887 static unsigned ext_csd_bits[][2] = {
888 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
889 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
890 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
891 };
892 static unsigned bus_widths[] = {
893 MMC_BUS_WIDTH_8,
894 MMC_BUS_WIDTH_4,
895 MMC_BUS_WIDTH_1
896 };
897 unsigned idx, bus_width = 0;
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +0200898
Aries Lee22113ef2010-12-15 08:14:24 +0100899 if (host->caps & MMC_CAP_8_BIT_DATA)
900 idx = 0;
901 else
902 idx = 1;
903 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
904 bus_width = bus_widths[idx];
905 if (bus_width == MMC_BUS_WIDTH_1)
906 ddr = 0; /* no DDR for 1-bit width */
Girish K Sd4674832011-09-23 20:41:47 +0530907 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
908 ext_csd);
909 if (err)
910 pr_err("%s: power class selection to "
911 "bus width %d failed\n",
912 mmc_hostname(card->host),
913 1 << bus_width);
914
Aries Lee22113ef2010-12-15 08:14:24 +0100915 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
916 EXT_CSD_BUS_WIDTH,
Andrei Warkentind3a8d952011-04-11 16:13:43 -0500917 ext_csd_bits[idx][0],
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900918 card->ext_csd.generic_cmd6_time);
Aries Lee22113ef2010-12-15 08:14:24 +0100919 if (!err) {
Philip Rakity4c4cb172011-05-13 11:17:18 +0530920 mmc_set_bus_width(card->host, bus_width);
Philip Rakity08ee80c2011-05-24 18:14:58 -0700921
Aries Lee22113ef2010-12-15 08:14:24 +0100922 /*
923 * If controller can't handle bus width test,
Philip Rakity08ee80c2011-05-24 18:14:58 -0700924 * compare ext_csd previously read in 1 bit mode
925 * against ext_csd at new bus width
Aries Lee22113ef2010-12-15 08:14:24 +0100926 */
927 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
Philip Rakity08ee80c2011-05-24 18:14:58 -0700928 err = mmc_compare_ext_csds(card,
Philip Rakity08ee80c2011-05-24 18:14:58 -0700929 bus_width);
930 else
931 err = mmc_bus_test(card, bus_width);
Aries Lee22113ef2010-12-15 08:14:24 +0100932 if (!err)
933 break;
934 }
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +0200935 }
936
Aries Lee22113ef2010-12-15 08:14:24 +0100937 if (!err && ddr) {
Girish K Sd4674832011-09-23 20:41:47 +0530938 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
939 ext_csd);
940 if (err)
941 pr_err("%s: power class selection to "
942 "bus width %d ddr %d failed\n",
943 mmc_hostname(card->host),
944 1 << bus_width, ddr);
945
Aries Lee22113ef2010-12-15 08:14:24 +0100946 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Andrei Warkentind3a8d952011-04-11 16:13:43 -0500947 EXT_CSD_BUS_WIDTH,
948 ext_csd_bits[idx][1],
Seungwon Jeon0007bbc2011-09-23 14:15:29 +0900949 card->ext_csd.generic_cmd6_time);
Aries Lee22113ef2010-12-15 08:14:24 +0100950 }
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700951 if (err) {
Adrian Hunter0f8d8ea2010-08-24 13:20:26 +0300952 printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
Aries Lee22113ef2010-12-15 08:14:24 +0100953 "failed\n", mmc_hostname(card->host),
954 1 << bus_width, ddr);
955 goto free_card;
956 } else if (ddr) {
Philip Rakity4c4cb172011-05-13 11:17:18 +0530957 /*
958 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
959 * signaling.
960 *
961 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
962 *
963 * 1.8V vccq at 3.3V core voltage (vcc) is not required
964 * in the JEDEC spec for DDR.
965 *
966 * Do not force change in vccq since we are obviously
967 * working and no change to vccq is needed.
968 *
969 * WARNING: eMMC rules are NOT the same as SD DDR
970 */
Sahitya Tummala21e22822011-11-02 09:48:24 +0530971 if (ddr == MMC_1_2V_DDR_MODE) {
Philip Rakity4c4cb172011-05-13 11:17:18 +0530972 err = mmc_set_signal_voltage(host,
973 MMC_SIGNAL_VOLTAGE_120, 0);
974 if (err)
975 goto err;
976 }
Aries Lee22113ef2010-12-15 08:14:24 +0100977 mmc_card_set_ddr_mode(card);
Philip Rakity4c4cb172011-05-13 11:17:18 +0530978 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
979 mmc_set_bus_width(card->host, bus_width);
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700980 }
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200981 }
982
Seungwon Jeonf8764902011-10-14 14:03:21 +0900983 /*
984 * If cache size is higher than 0, this indicates
985 * the existence of cache and it can be turned on.
986 */
987 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
988 card->ext_csd.cache_size > 0) {
989 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
990 EXT_CSD_CACHE_CTRL, 1, 0);
991 if (err && err != -EBADMSG)
992 goto free_card;
993
994 /*
995 * Only if no error, cache is turned on successfully.
996 */
997 card->ext_csd.cache_ctrl = err ? 0 : 1;
998 }
999
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001000 if (!oldcard)
1001 host->card = card;
1002
Philip Rakity08ee80c2011-05-24 18:14:58 -07001003 mmc_free_ext_csd(ext_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +02001004 return 0;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001005
1006free_card:
1007 if (!oldcard)
1008 mmc_remove_card(card);
1009err:
Philip Rakity08ee80c2011-05-24 18:14:58 -07001010 mmc_free_ext_csd(ext_csd);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001011
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001012 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001013}
1014
1015/*
1016 * Host is being removed. Free up the current card.
1017 */
1018static void mmc_remove(struct mmc_host *host)
1019{
1020 BUG_ON(!host);
1021 BUG_ON(!host->card);
1022
1023 mmc_remove_card(host->card);
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -07001024
1025 mmc_claim_host(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001026 host->card = NULL;
Bryan Huntsman3f2bc4d2011-08-16 17:27:22 -07001027 mmc_release_host(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001028}
1029
1030/*
Adrian Hunter8b581b02011-11-28 16:22:00 +02001031 * Card detection - card is alive.
1032 */
1033static int mmc_alive(struct mmc_host *host)
1034{
1035 return mmc_send_status(host->card, NULL);
1036}
1037
1038/*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001039 * Card detection callback from host.
1040 */
1041static void mmc_detect(struct mmc_host *host)
1042{
1043 int err;
1044
1045 BUG_ON(!host);
1046 BUG_ON(!host->card);
1047
1048 mmc_claim_host(host);
1049
1050 /*
1051 * Just check if our card has been removed.
1052 */
Adrian Hunter8b581b02011-11-28 16:22:00 +02001053 err = _mmc_detect_card_removed(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001054
1055 mmc_release_host(host);
1056
Pierre Ossman17b04292007-07-22 22:18:46 +02001057 if (err) {
Pierre Ossman4101c162007-05-19 13:39:01 +02001058 mmc_remove(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001059
1060 mmc_claim_host(host);
1061 mmc_detach_bus(host);
1062 mmc_release_host(host);
1063 }
1064}
1065
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001066/*
1067 * Suspend callback from host.
1068 */
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001069static int mmc_suspend(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001070{
Balaji T K8df15da2011-07-13 20:06:27 +05301071 int err = 0;
1072
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001073 BUG_ON(!host);
1074 BUG_ON(!host->card);
1075
1076 mmc_claim_host(host);
Balaji T K8df15da2011-07-13 20:06:27 +05301077 if (mmc_card_can_sleep(host))
1078 err = mmc_card_sleep(host);
1079 else if (!mmc_host_is_spi(host))
David Brownellaf517152007-08-08 09:11:32 -07001080 mmc_deselect_cards(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001081 host->card->state &= ~MMC_STATE_HIGHSPEED;
1082 mmc_release_host(host);
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001083
Balaji T K8df15da2011-07-13 20:06:27 +05301084 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001085}
1086
1087/*
1088 * Resume callback from host.
1089 *
1090 * This function tries to determine if the same card is still present
1091 * and, if so, restore all state to it.
1092 */
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001093static int mmc_resume(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001094{
1095 int err;
1096
1097 BUG_ON(!host);
1098 BUG_ON(!host->card);
1099
1100 mmc_claim_host(host);
Pierre Ossman8c75dea2007-05-19 16:14:43 +02001101 err = mmc_init_card(host, host->ocr, host->card);
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001102 mmc_release_host(host);
1103
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001104 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001105}
1106
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001107static int mmc_power_restore(struct mmc_host *host)
Adrian Huntereae1aee2009-09-22 16:44:33 -07001108{
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001109 int ret;
1110
Adrian Huntereae1aee2009-09-22 16:44:33 -07001111 host->card->state &= ~MMC_STATE_HIGHSPEED;
1112 mmc_claim_host(host);
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001113 ret = mmc_init_card(host, host->ocr, host->card);
Adrian Huntereae1aee2009-09-22 16:44:33 -07001114 mmc_release_host(host);
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001115
1116 return ret;
Adrian Huntereae1aee2009-09-22 16:44:33 -07001117}
1118
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001119static int mmc_sleep(struct mmc_host *host)
1120{
1121 struct mmc_card *card = host->card;
1122 int err = -ENOSYS;
1123
1124 if (card && card->ext_csd.rev >= 3) {
1125 err = mmc_card_sleepawake(host, 1);
1126 if (err < 0)
1127 pr_debug("%s: Error %d while putting card into sleep",
1128 mmc_hostname(host), err);
1129 }
1130
1131 return err;
1132}
1133
1134static int mmc_awake(struct mmc_host *host)
1135{
1136 struct mmc_card *card = host->card;
1137 int err = -ENOSYS;
1138
1139 if (card && card->ext_csd.rev >= 3) {
1140 err = mmc_card_sleepawake(host, 0);
1141 if (err < 0)
1142 pr_debug("%s: Error %d while awaking sleeping card",
1143 mmc_hostname(host), err);
1144 }
1145
1146 return err;
1147}
1148
Adrian Hunter9feae242009-09-22 16:44:32 -07001149static const struct mmc_bus_ops mmc_ops = {
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001150 .awake = mmc_awake,
1151 .sleep = mmc_sleep,
Adrian Hunter9feae242009-09-22 16:44:32 -07001152 .remove = mmc_remove,
1153 .detect = mmc_detect,
1154 .suspend = NULL,
1155 .resume = NULL,
Adrian Huntereae1aee2009-09-22 16:44:33 -07001156 .power_restore = mmc_power_restore,
Adrian Hunter8b581b02011-11-28 16:22:00 +02001157 .alive = mmc_alive,
Adrian Hunter9feae242009-09-22 16:44:32 -07001158};
1159
1160static const struct mmc_bus_ops mmc_ops_unsafe = {
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001161 .awake = mmc_awake,
1162 .sleep = mmc_sleep,
Adrian Hunter9feae242009-09-22 16:44:32 -07001163 .remove = mmc_remove,
1164 .detect = mmc_detect,
1165 .suspend = mmc_suspend,
1166 .resume = mmc_resume,
Adrian Huntereae1aee2009-09-22 16:44:33 -07001167 .power_restore = mmc_power_restore,
Adrian Hunter8b581b02011-11-28 16:22:00 +02001168 .alive = mmc_alive,
Adrian Hunter9feae242009-09-22 16:44:32 -07001169};
1170
1171static void mmc_attach_bus_ops(struct mmc_host *host)
1172{
1173 const struct mmc_bus_ops *bus_ops;
1174
Matt Fleming71d7d3d2010-09-27 09:42:19 +01001175 if (!mmc_card_is_removable(host))
Adrian Hunter9feae242009-09-22 16:44:32 -07001176 bus_ops = &mmc_ops_unsafe;
1177 else
1178 bus_ops = &mmc_ops;
1179 mmc_attach_bus(host, bus_ops);
1180}
1181
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001182/*
1183 * Starting point for MMC card init.
1184 */
Andy Ross807e8e42011-01-03 10:36:56 -08001185int mmc_attach_mmc(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001186{
1187 int err;
Andy Ross807e8e42011-01-03 10:36:56 -08001188 u32 ocr;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001189
1190 BUG_ON(!host);
Pierre Ossmand84075c82007-08-09 13:23:56 +02001191 WARN_ON(!host->claimed);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001192
Andy Ross807e8e42011-01-03 10:36:56 -08001193 err = mmc_send_op_cond(host, 0, &ocr);
1194 if (err)
1195 return err;
1196
Adrian Hunter9feae242009-09-22 16:44:32 -07001197 mmc_attach_bus_ops(host);
Takashi Iwai8f230f42010-12-08 10:04:30 +01001198 if (host->ocr_avail_mmc)
1199 host->ocr_avail = host->ocr_avail_mmc;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001200
1201 /*
David Brownellaf517152007-08-08 09:11:32 -07001202 * We need to get OCR a different way for SPI.
1203 */
1204 if (mmc_host_is_spi(host)) {
1205 err = mmc_spi_read_ocr(host, 1, &ocr);
1206 if (err)
1207 goto err;
1208 }
1209
1210 /*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001211 * Sanity check the voltages that the card claims to
1212 * support.
1213 */
1214 if (ocr & 0x7F) {
1215 printk(KERN_WARNING "%s: card claims to support voltages "
1216 "below the defined range. These will be ignored.\n",
1217 mmc_hostname(host));
1218 ocr &= ~0x7F;
1219 }
1220
1221 host->ocr = mmc_select_voltage(host, ocr);
1222
1223 /*
1224 * Can we support the voltage of the card?
1225 */
Pierre Ossman109b5be2007-07-23 00:12:10 +02001226 if (!host->ocr) {
1227 err = -EINVAL;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001228 goto err;
Pierre Ossman109b5be2007-07-23 00:12:10 +02001229 }
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001230
1231 /*
1232 * Detect and init the card.
1233 */
Pierre Ossman8c75dea2007-05-19 16:14:43 +02001234 err = mmc_init_card(host, host->ocr, NULL);
Pierre Ossman17b04292007-07-22 22:18:46 +02001235 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001236 goto err;
1237
1238 mmc_release_host(host);
Pierre Ossman4101c162007-05-19 13:39:01 +02001239 err = mmc_add_card(host->card);
Andy Ross807e8e42011-01-03 10:36:56 -08001240 mmc_claim_host(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001241 if (err)
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001242 goto remove_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001243
1244 return 0;
1245
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001246remove_card:
Andy Ross807e8e42011-01-03 10:36:56 -08001247 mmc_release_host(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001248 mmc_remove_card(host->card);
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001249 mmc_claim_host(host);
Andy Ross807e8e42011-01-03 10:36:56 -08001250 host->card = NULL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001251err:
1252 mmc_detach_bus(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001253
Pierre Ossman109b5be2007-07-23 00:12:10 +02001254 printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
1255 mmc_hostname(host), err);
1256
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001257 return err;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001258}