blob: fb5bf01dd1b2df1b36a33c6616f618976fdfbbac [file] [log] [blame]
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:
Girish K Sa3c76eb2011-10-11 11:44:09 +0530104 pr_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) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530138 pr_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) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530198 pr_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)) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530220 pr_err("%s: unable to read EXT_CSD "
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100221 "on a possible high capacity card. "
222 "Card will be ignored.\n",
223 mmc_hostname(card->host));
224 } else {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530225 pr_warning("%s: unable to read "
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100226 "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{
Namjae Jeone0c368d2011-10-06 23:41:38 +0900242 int err = 0, idx;
243 unsigned int part_size;
244 u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
Philip Rakity08ee80c2011-05-24 18:14:58 -0700245
246 BUG_ON(!card);
247
248 if (!ext_csd)
249 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100250
Kyungmin Park6da24b72010-08-10 18:01:36 -0700251 /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700252 card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
Kyungmin Park6da24b72010-08-10 18:01:36 -0700253 if (card->csd.structure == 3) {
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700254 if (card->ext_csd.raw_ext_csd_structure > 2) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530255 pr_err("%s: unrecognised EXT_CSD structure "
Kyungmin Park6da24b72010-08-10 18:01:36 -0700256 "version %d\n", mmc_hostname(card->host),
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700257 card->ext_csd.raw_ext_csd_structure);
Kyungmin Park6da24b72010-08-10 18:01:36 -0700258 err = -EINVAL;
259 goto out;
260 }
261 }
262
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700263 card->ext_csd.rev = ext_csd[EXT_CSD_REV];
Kyungmin Park38ca2852011-07-26 17:12:37 +0900264 if (card->ext_csd.rev > 6) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530265 pr_err("%s: unrecognised EXT_CSD revision %d\n",
Kyungmin Park6da24b72010-08-10 18:01:36 -0700266 mmc_hostname(card->host), card->ext_csd.rev);
Florin Malita00cedfa2007-10-13 12:27:20 -0400267 err = -EINVAL;
268 goto out;
Pierre Ossmand7604d72007-07-23 00:34:07 +0200269 }
270
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700271 card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
272 card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
273 card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
274 card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700275 if (card->ext_csd.rev >= 2) {
Pierre Ossmand7604d72007-07-23 00:34:07 +0200276 card->ext_csd.sectors =
277 ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
278 ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
279 ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
280 ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
Hanumath Prasadfc8a0982010-08-10 18:01:45 -0700281
282 /* Cards with density > 2GiB are sector addressed */
283 if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
Pierre Ossmand7604d72007-07-23 00:34:07 +0200284 mmc_card_set_blockaddr(card);
285 }
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700286 card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
Adrian Hunter7198f3c2010-03-23 13:35:40 -0700287 switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400288 case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
289 EXT_CSD_CARD_TYPE_26:
290 card->ext_csd.hs_max_dtr = 52000000;
291 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
292 break;
293 case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
294 EXT_CSD_CARD_TYPE_26:
295 card->ext_csd.hs_max_dtr = 52000000;
296 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
297 break;
298 case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
299 EXT_CSD_CARD_TYPE_26:
300 card->ext_csd.hs_max_dtr = 52000000;
301 card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
302 break;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100303 case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
304 card->ext_csd.hs_max_dtr = 52000000;
305 break;
306 case EXT_CSD_CARD_TYPE_26:
307 card->ext_csd.hs_max_dtr = 26000000;
308 break;
309 default:
310 /* MMC v4 spec says this cannot happen */
Girish K Sa3c76eb2011-10-11 11:44:09 +0530311 pr_warning("%s: card is mmc v4 but doesn't "
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100312 "support any high-speed modes.\n",
313 mmc_hostname(card->host));
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100314 }
315
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700316 card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
317 card->ext_csd.raw_erase_timeout_mult =
318 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
319 card->ext_csd.raw_hc_erase_grp_size =
320 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700321 if (card->ext_csd.rev >= 3) {
322 u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
Andrei Warkentin371a6892011-04-11 18:10:25 -0500323 card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
324
325 /* EXT_CSD value is in units of 10ms, but we store in ms */
326 card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700327
328 /* Sleep / awake timeout in 100ns units */
329 if (sa_shift > 0 && sa_shift <= 0x17)
330 card->ext_csd.sa_timeout =
331 1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700332 card->ext_csd.erase_group_def =
333 ext_csd[EXT_CSD_ERASE_GROUP_DEF];
334 card->ext_csd.hc_erase_timeout = 300 *
335 ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
336 card->ext_csd.hc_erase_size =
337 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500338
339 card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
Andrei Warkentin371a6892011-04-11 18:10:25 -0500340
341 /*
342 * There are two boot regions of equal size, defined in
343 * multiples of 128K.
344 */
Namjae Jeone0c368d2011-10-06 23:41:38 +0900345 if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
346 for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
347 part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
348 mmc_part_add(card, part_size,
349 EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
350 "boot%d", idx, true);
351 }
352 }
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -0700353 }
354
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700355 card->ext_csd.raw_hc_erase_gap_size =
356 ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
357 card->ext_csd.raw_sec_trim_mult =
358 ext_csd[EXT_CSD_SEC_TRIM_MULT];
359 card->ext_csd.raw_sec_erase_mult =
360 ext_csd[EXT_CSD_SEC_ERASE_MULT];
361 card->ext_csd.raw_sec_feature_support =
362 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
363 card->ext_csd.raw_trim_mult =
364 ext_csd[EXT_CSD_TRIM_MULT];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700365 if (card->ext_csd.rev >= 4) {
Chuanxiao Dong709de992011-01-22 04:09:41 +0800366 /*
367 * Enhanced area feature support -- check whether the eMMC
368 * card has the Enhanced area enabled. If so, export enhanced
369 * area offset and size to user by adding sysfs interface.
370 */
Andrei Warkentin5238acb2011-09-24 12:12:30 -0400371 card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
Chuanxiao Dong709de992011-01-22 04:09:41 +0800372 if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700373 (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
Namjae Jeone0c368d2011-10-06 23:41:38 +0900374 hc_erase_grp_sz =
Chuanxiao Dong709de992011-01-22 04:09:41 +0800375 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
Namjae Jeone0c368d2011-10-06 23:41:38 +0900376 hc_wp_grp_sz =
Chuanxiao Dong709de992011-01-22 04:09:41 +0800377 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
378
379 card->ext_csd.enhanced_area_en = 1;
380 /*
381 * calculate the enhanced data area offset, in bytes
382 */
383 card->ext_csd.enhanced_area_offset =
384 (ext_csd[139] << 24) + (ext_csd[138] << 16) +
385 (ext_csd[137] << 8) + ext_csd[136];
386 if (mmc_card_blockaddr(card))
387 card->ext_csd.enhanced_area_offset <<= 9;
388 /*
389 * calculate the enhanced data area size, in kilobytes
390 */
391 card->ext_csd.enhanced_area_size =
392 (ext_csd[142] << 16) + (ext_csd[141] << 8) +
393 ext_csd[140];
394 card->ext_csd.enhanced_area_size *=
395 (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
396 card->ext_csd.enhanced_area_size <<= 9;
397 } else {
398 /*
399 * If the enhanced area is not enabled, disable these
400 * device attributes.
401 */
402 card->ext_csd.enhanced_area_offset = -EINVAL;
403 card->ext_csd.enhanced_area_size = -EINVAL;
404 }
Namjae Jeone0c368d2011-10-06 23:41:38 +0900405
406 /*
407 * General purpose partition feature support --
408 * If ext_csd has the size of general purpose partitions,
409 * set size, part_cfg, partition name in mmc_part.
410 */
411 if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
412 EXT_CSD_PART_SUPPORT_PART_EN) {
413 if (card->ext_csd.enhanced_area_en != 1) {
414 hc_erase_grp_sz =
415 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
416 hc_wp_grp_sz =
417 ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
418
419 card->ext_csd.enhanced_area_en = 1;
420 }
421
422 for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
423 if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
424 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
425 !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
426 continue;
427 part_size =
428 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
429 << 16) +
430 (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
431 << 8) +
432 ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
433 part_size *= (size_t)(hc_erase_grp_sz *
434 hc_wp_grp_sz);
435 mmc_part_add(card, part_size << 19,
436 EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
437 "gp%d", idx, false);
438 }
439 }
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700440 card->ext_csd.sec_trim_mult =
441 ext_csd[EXT_CSD_SEC_TRIM_MULT];
442 card->ext_csd.sec_erase_mult =
443 ext_csd[EXT_CSD_SEC_ERASE_MULT];
444 card->ext_csd.sec_feature_support =
445 ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
446 card->ext_csd.trim_timeout = 300 *
447 ext_csd[EXT_CSD_TRIM_MULT];
448 }
449
Adrian Hunterb2499512011-08-29 16:42:11 +0300450 if (card->ext_csd.rev >= 5) {
Jaehoon Chungeb0d8f12011-10-18 01:26:42 -0400451 /* check whether the eMMC card supports HPI */
452 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
453 card->ext_csd.hpi = 1;
454 if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
455 card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
456 else
457 card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
458 /*
459 * Indicate the maximum timeout to close
460 * a command interrupted by HPI
461 */
462 card->ext_csd.out_of_int_time =
463 ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
464 }
465
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500466 card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
Adrian Hunterb2499512011-08-29 16:42:11 +0300467 card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
468 }
Andrei Warkentinf4c55222011-03-31 18:40:00 -0500469
Kyungmin Parkb3bf9152011-10-18 09:34:04 +0900470 /* eMMC v4.5 or later */
471 if (card->ext_csd.rev >= 6)
472 card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
473
Andrei Warkentin5238acb2011-09-24 12:12:30 -0400474 card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700475 if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
476 card->erased_byte = 0xFF;
477 else
478 card->erased_byte = 0x0;
479
Girish K Sbec87262011-10-13 12:04:16 +0530480 if (card->ext_csd.rev >= 6) {
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +0900481 card->ext_csd.generic_cmd6_time = 10 *
482 ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
Girish K Sbec87262011-10-13 12:04:16 +0530483 card->ext_csd.power_off_longtime = 10 *
484 ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
485 } else
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +0900486 card->ext_csd.generic_cmd6_time = 0;
487
Seungwon Jeon881d1c22011-10-14 14:03:21 +0900488 card->ext_csd.cache_size =
489 ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
490 ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
491 ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
492 ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
493
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100494out:
Philip Rakity08ee80c2011-05-24 18:14:58 -0700495 return err;
496}
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100497
Philip Rakity08ee80c2011-05-24 18:14:58 -0700498static inline void mmc_free_ext_csd(u8 *ext_csd)
499{
500 kfree(ext_csd);
501}
502
503
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700504static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
Philip Rakity08ee80c2011-05-24 18:14:58 -0700505{
506 u8 *bw_ext_csd;
507 int err;
508
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700509 if (bus_width == MMC_BUS_WIDTH_1)
510 return 0;
Philip Rakity08ee80c2011-05-24 18:14:58 -0700511
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700512 err = mmc_get_ext_csd(card, &bw_ext_csd);
513
514 if (err || bw_ext_csd == NULL) {
Philip Rakity08ee80c2011-05-24 18:14:58 -0700515 if (bus_width != MMC_BUS_WIDTH_1)
516 err = -EINVAL;
517 goto out;
518 }
519
520 if (bus_width == MMC_BUS_WIDTH_1)
521 goto out;
522
523 /* only compare read only fields */
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700524 err = (!(card->ext_csd.raw_partition_support ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700525 bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700526 (card->ext_csd.raw_erased_mem_count ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700527 bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700528 (card->ext_csd.rev ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700529 bw_ext_csd[EXT_CSD_REV]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700530 (card->ext_csd.raw_ext_csd_structure ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700531 bw_ext_csd[EXT_CSD_STRUCTURE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700532 (card->ext_csd.raw_card_type ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700533 bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700534 (card->ext_csd.raw_s_a_timeout ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700535 bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700536 (card->ext_csd.raw_hc_erase_gap_size ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700537 bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700538 (card->ext_csd.raw_erase_timeout_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700539 bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700540 (card->ext_csd.raw_hc_erase_grp_size ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700541 bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700542 (card->ext_csd.raw_sec_trim_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700543 bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700544 (card->ext_csd.raw_sec_erase_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700545 bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700546 (card->ext_csd.raw_sec_feature_support ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700547 bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700548 (card->ext_csd.raw_trim_mult ==
Philip Rakity08ee80c2011-05-24 18:14:58 -0700549 bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
Philip Rakityf39b2dd2011-07-07 09:04:55 -0700550 (card->ext_csd.raw_sectors[0] ==
551 bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
552 (card->ext_csd.raw_sectors[1] ==
553 bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
554 (card->ext_csd.raw_sectors[2] ==
555 bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
556 (card->ext_csd.raw_sectors[3] ==
557 bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
Philip Rakity08ee80c2011-05-24 18:14:58 -0700558 if (err)
559 err = -EINVAL;
560
561out:
562 mmc_free_ext_csd(bw_ext_csd);
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100563 return err;
564}
565
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100566MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
567 card->raw_cid[2], card->raw_cid[3]);
568MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
569 card->raw_csd[2], card->raw_csd[3]);
570MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700571MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
572MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100573MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
574MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
575MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
576MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
577MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
578MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
Chuanxiao Dong709de992011-01-22 04:09:41 +0800579MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
580 card->ext_csd.enhanced_area_offset);
581MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100582
583static struct attribute *mmc_std_attrs[] = {
584 &dev_attr_cid.attr,
585 &dev_attr_csd.attr,
586 &dev_attr_date.attr,
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700587 &dev_attr_erase_size.attr,
588 &dev_attr_preferred_erase_size.attr,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100589 &dev_attr_fwrev.attr,
590 &dev_attr_hwrev.attr,
591 &dev_attr_manfid.attr,
592 &dev_attr_name.attr,
593 &dev_attr_oemid.attr,
594 &dev_attr_serial.attr,
Chuanxiao Dong709de992011-01-22 04:09:41 +0800595 &dev_attr_enhanced_area_offset.attr,
596 &dev_attr_enhanced_area_size.attr,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100597 NULL,
598};
599
600static struct attribute_group mmc_std_attr_group = {
601 .attrs = mmc_std_attrs,
602};
603
David Brownella4dbd672009-06-24 10:06:31 -0700604static const struct attribute_group *mmc_attr_groups[] = {
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100605 &mmc_std_attr_group,
606 NULL,
607};
608
609static struct device_type mmc_type = {
610 .groups = mmc_attr_groups,
611};
612
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100613/*
Girish K Sb87d8db2011-09-23 20:41:47 +0530614 * Select the PowerClass for the current bus width
615 * If power class is defined for 4/8 bit bus in the
616 * extended CSD register, select it by executing the
617 * mmc_switch command.
618 */
619static int mmc_select_powerclass(struct mmc_card *card,
620 unsigned int bus_width, u8 *ext_csd)
621{
622 int err = 0;
623 unsigned int pwrclass_val;
624 unsigned int index = 0;
625 struct mmc_host *host;
626
627 BUG_ON(!card);
628
629 host = card->host;
630 BUG_ON(!host);
631
632 if (ext_csd == NULL)
633 return 0;
634
635 /* Power class selection is supported for versions >= 4.0 */
636 if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
637 return 0;
638
639 /* Power class values are defined only for 4/8 bit bus */
640 if (bus_width == EXT_CSD_BUS_WIDTH_1)
641 return 0;
642
643 switch (1 << host->ios.vdd) {
644 case MMC_VDD_165_195:
645 if (host->ios.clock <= 26000000)
646 index = EXT_CSD_PWR_CL_26_195;
647 else if (host->ios.clock <= 52000000)
648 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
649 EXT_CSD_PWR_CL_52_195 :
650 EXT_CSD_PWR_CL_DDR_52_195;
651 else if (host->ios.clock <= 200000000)
652 index = EXT_CSD_PWR_CL_200_195;
653 break;
654 case MMC_VDD_32_33:
655 case MMC_VDD_33_34:
656 case MMC_VDD_34_35:
657 case MMC_VDD_35_36:
658 if (host->ios.clock <= 26000000)
659 index = EXT_CSD_PWR_CL_26_360;
660 else if (host->ios.clock <= 52000000)
661 index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
662 EXT_CSD_PWR_CL_52_360 :
663 EXT_CSD_PWR_CL_DDR_52_360;
664 else if (host->ios.clock <= 200000000)
665 index = EXT_CSD_PWR_CL_200_360;
666 break;
667 default:
668 pr_warning("%s: Voltage range not supported "
669 "for power class.\n", mmc_hostname(host));
670 return -EINVAL;
671 }
672
673 pwrclass_val = ext_csd[index];
674
675 if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
676 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
677 EXT_CSD_PWR_CL_8BIT_SHIFT;
678 else
679 pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
680 EXT_CSD_PWR_CL_4BIT_SHIFT;
681
682 /* If the power class is different from the default value */
683 if (pwrclass_val > 0) {
684 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
685 EXT_CSD_POWER_CLASS,
686 pwrclass_val,
Seungwon Jeon71fe3eb2011-10-18 13:20:57 +0900687 card->ext_csd.generic_cmd6_time);
Girish K Sb87d8db2011-09-23 20:41:47 +0530688 }
689
690 return err;
691}
692
693/*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200694 * Handle the detection and initialisation of a card.
695 *
Deepak Saxena87693922008-06-16 19:20:57 -0700696 * In the case of a resume, "oldcard" will contain the card
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200697 * we're trying to reinitialise.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100698 */
Pierre Ossman8c75dea2007-05-19 16:14:43 +0200699static int mmc_init_card(struct mmc_host *host, u32 ocr,
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200700 struct mmc_card *oldcard)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100701{
702 struct mmc_card *card;
Philip Rakity25d5c692010-11-07 16:22:28 -0500703 int err, ddr = 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100704 u32 cid[4];
705 unsigned int max_dtr;
Philip Rakityb676f032011-02-13 23:13:09 -0800706 u32 rocr;
Philip Rakity08ee80c2011-05-24 18:14:58 -0700707 u8 *ext_csd = NULL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100708
709 BUG_ON(!host);
Pierre Ossmand84075c82007-08-09 13:23:56 +0200710 WARN_ON(!host->claimed);
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100711
Stefan Nilsson XK44669032011-09-15 17:50:38 +0200712 /* Set correct bus mode for MMC before attempting init */
713 if (!mmc_host_is_spi(host))
714 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
715
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100716 /*
717 * Since we're changing the OCR value, we seem to
718 * need to tell some cards to go back to the idle
719 * state. We wait 1ms to give cards time to
720 * respond.
Balaji T Kc3805462011-09-08 22:08:39 +0530721 * mmc_go_idle is needed for eMMC that are asleep
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100722 */
723 mmc_go_idle(host);
724
725 /* The extra bit indicates that we support high capacity */
Philip Rakityb676f032011-02-13 23:13:09 -0800726 err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
Pierre Ossman17b04292007-07-22 22:18:46 +0200727 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200728 goto err;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100729
730 /*
David Brownellaf517152007-08-08 09:11:32 -0700731 * For SPI, enable CRC as appropriate.
732 */
733 if (mmc_host_is_spi(host)) {
734 err = mmc_spi_set_crc(host, use_spi_crc);
735 if (err)
736 goto err;
737 }
738
739 /*
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100740 * Fetch CID from card.
741 */
David Brownellaf517152007-08-08 09:11:32 -0700742 if (mmc_host_is_spi(host))
743 err = mmc_send_cid(host, cid);
744 else
745 err = mmc_all_send_cid(host, cid);
Pierre Ossman17b04292007-07-22 22:18:46 +0200746 if (err)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100747 goto err;
748
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200749 if (oldcard) {
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200750 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
751 err = -ENOENT;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200752 goto err;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200753 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100754
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200755 card = oldcard;
756 } else {
757 /*
758 * Allocate card structure.
759 */
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100760 card = mmc_alloc_card(host, &mmc_type);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200761 if (IS_ERR(card)) {
762 err = PTR_ERR(card);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200763 goto err;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200764 }
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200765
766 card->type = MMC_TYPE_MMC;
767 card->rca = 1;
768 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
769 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100770
771 /*
David Brownellaf517152007-08-08 09:11:32 -0700772 * For native busses: set card RCA and quit open drain mode.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100773 */
David Brownellaf517152007-08-08 09:11:32 -0700774 if (!mmc_host_is_spi(host)) {
775 err = mmc_set_relative_addr(card);
776 if (err)
777 goto free_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100778
David Brownellaf517152007-08-08 09:11:32 -0700779 mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
780 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100781
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200782 if (!oldcard) {
783 /*
784 * Fetch CSD from card.
785 */
786 err = mmc_send_csd(card, card->raw_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +0200787 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200788 goto free_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100789
Pierre Ossmanbd766312007-05-01 16:11:57 +0200790 err = mmc_decode_csd(card);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200791 if (err)
Pierre Ossmanbd766312007-05-01 16:11:57 +0200792 goto free_card;
793 err = mmc_decode_cid(card);
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200794 if (err)
Pierre Ossmanbd766312007-05-01 16:11:57 +0200795 goto free_card;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200796 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100797
798 /*
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200799 * Select card, as all following commands rely on that.
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100800 */
David Brownellaf517152007-08-08 09:11:32 -0700801 if (!mmc_host_is_spi(host)) {
802 err = mmc_select_card(card);
803 if (err)
804 goto free_card;
805 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100806
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200807 if (!oldcard) {
808 /*
David Brownellaf517152007-08-08 09:11:32 -0700809 * Fetch and process extended CSD.
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200810 */
Philip Rakity08ee80c2011-05-24 18:14:58 -0700811
812 err = mmc_get_ext_csd(card, &ext_csd);
813 if (err)
814 goto free_card;
815 err = mmc_read_ext_csd(card, ext_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +0200816 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200817 goto free_card;
Philip Rakityb676f032011-02-13 23:13:09 -0800818
819 /* If doing byte addressing, check if required to do sector
820 * addressing. Handle the case of <2GB cards needing sector
821 * addressing. See section 8.1 JEDEC Standard JED84-A441;
822 * ocr register has bit 30 set for sector addressing.
823 */
824 if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
825 mmc_card_set_blockaddr(card);
826
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700827 /* Erase size depends on CSD and Extended CSD */
828 mmc_set_erase_size(card);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200829 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100830
831 /*
Chuanxiao Dong709de992011-01-22 04:09:41 +0800832 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300833 * bit. This bit will be lost every time after a reset or power off.
Chuanxiao Dong709de992011-01-22 04:09:41 +0800834 */
835 if (card->ext_csd.enhanced_area_en) {
836 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +0900837 EXT_CSD_ERASE_GROUP_DEF, 1,
838 card->ext_csd.generic_cmd6_time);
Chuanxiao Dong709de992011-01-22 04:09:41 +0800839
840 if (err && err != -EBADMSG)
841 goto free_card;
842
843 if (err) {
844 err = 0;
845 /*
846 * Just disable enhanced area off & sz
847 * will try to enable ERASE_GROUP_DEF
848 * during next time reinit
849 */
850 card->ext_csd.enhanced_area_offset = -EINVAL;
851 card->ext_csd.enhanced_area_size = -EINVAL;
852 } else {
853 card->ext_csd.erase_group_def = 1;
854 /*
855 * enable ERASE_GRP_DEF successfully.
856 * This will affect the erase size, so
857 * here need to reset erase size
858 */
859 mmc_set_erase_size(card);
860 }
861 }
862
863 /*
Philip Rakity41e2a482011-03-19 14:10:33 -0400864 * Ensure eMMC user default partition is enabled
865 */
Andrei Warkentin371a6892011-04-11 18:10:25 -0500866 if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
867 card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
868 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
869 card->ext_csd.part_config,
870 card->ext_csd.part_time);
871 if (err && err != -EBADMSG)
872 goto free_card;
Philip Rakity41e2a482011-03-19 14:10:33 -0400873 }
874
875 /*
Girish K Sbec87262011-10-13 12:04:16 +0530876 * If the host supports the power_off_notify capability then
877 * set the notification byte in the ext_csd register of device
878 */
879 if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
880 (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) {
881 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
882 EXT_CSD_POWER_OFF_NOTIFICATION,
883 EXT_CSD_POWER_ON,
884 card->ext_csd.generic_cmd6_time);
885 if (err && err != -EBADMSG)
886 goto free_card;
887 }
888
889 if (!err)
890 card->poweroff_notify_state = MMC_POWERED_ON;
891
892 /*
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200893 * Activate high speed (if supported)
894 */
895 if ((card->ext_csd.hs_max_dtr != 0) &&
896 (host->caps & MMC_CAP_MMC_HIGHSPEED)) {
897 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +0900898 EXT_CSD_HS_TIMING, 1,
899 card->ext_csd.generic_cmd6_time);
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700900 if (err && err != -EBADMSG)
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200901 goto free_card;
902
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700903 if (err) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530904 pr_warning("%s: switch to highspeed failed\n",
Adrian Hunteref0b27d2009-09-22 16:44:37 -0700905 mmc_hostname(card->host));
906 err = 0;
907 } else {
908 mmc_card_set_highspeed(card);
909 mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
910 }
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200911 }
912
913 /*
Jaehoon Chungeb0d8f12011-10-18 01:26:42 -0400914 * Enable HPI feature (if supported)
915 */
916 if (card->ext_csd.hpi) {
917 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
918 EXT_CSD_HPI_MGMT, 1, 0);
919 if (err && err != -EBADMSG)
920 goto free_card;
921 if (err) {
922 pr_warning("%s: Enabling HPI failed\n",
923 mmc_hostname(card->host));
924 err = 0;
925 } else
926 card->ext_csd.hpi_en = 1;
927 }
928
929 /*
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100930 * Compute bus speed.
931 */
932 max_dtr = (unsigned int)-1;
933
934 if (mmc_card_highspeed(card)) {
935 if (max_dtr > card->ext_csd.hs_max_dtr)
936 max_dtr = card->ext_csd.hs_max_dtr;
937 } else if (max_dtr > card->csd.max_dtr) {
938 max_dtr = card->csd.max_dtr;
939 }
940
941 mmc_set_clock(host, max_dtr);
942
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200943 /*
Adrian Hunter0f8d8ea2010-08-24 13:20:26 +0300944 * Indicate DDR mode (if supported).
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400945 */
946 if (mmc_card_highspeed(card)) {
947 if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
Philip Rakity4c4cb172011-05-13 11:17:18 +0530948 && ((host->caps & (MMC_CAP_1_8V_DDR |
949 MMC_CAP_UHS_DDR50))
950 == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
Adrian Hunter49e3b5a2010-10-11 12:43:50 +0300951 ddr = MMC_1_8V_DDR_MODE;
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400952 else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
Philip Rakity4c4cb172011-05-13 11:17:18 +0530953 && ((host->caps & (MMC_CAP_1_2V_DDR |
954 MMC_CAP_UHS_DDR50))
955 == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
Adrian Hunter49e3b5a2010-10-11 12:43:50 +0300956 ddr = MMC_1_2V_DDR_MODE;
Hanumath Prasaddfc13e82010-09-30 17:37:23 -0400957 }
958
959 /*
Adrian Hunter0f8d8ea2010-08-24 13:20:26 +0300960 * Activate wide bus and DDR (if supported).
Pierre Ossman89a73cf2007-05-01 15:08:30 +0200961 */
962 if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +0200963 (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
Aries Lee22113ef2010-12-15 08:14:24 +0100964 static unsigned ext_csd_bits[][2] = {
965 { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
966 { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
967 { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
968 };
969 static unsigned bus_widths[] = {
970 MMC_BUS_WIDTH_8,
971 MMC_BUS_WIDTH_4,
972 MMC_BUS_WIDTH_1
973 };
974 unsigned idx, bus_width = 0;
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +0200975
Aries Lee22113ef2010-12-15 08:14:24 +0100976 if (host->caps & MMC_CAP_8_BIT_DATA)
977 idx = 0;
978 else
979 idx = 1;
980 for (; idx < ARRAY_SIZE(bus_widths); idx++) {
981 bus_width = bus_widths[idx];
982 if (bus_width == MMC_BUS_WIDTH_1)
983 ddr = 0; /* no DDR for 1-bit width */
Girish K Sb87d8db2011-09-23 20:41:47 +0530984 err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
985 ext_csd);
986 if (err)
987 pr_err("%s: power class selection to "
988 "bus width %d failed\n",
989 mmc_hostname(card->host),
990 1 << bus_width);
991
Aries Lee22113ef2010-12-15 08:14:24 +0100992 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
993 EXT_CSD_BUS_WIDTH,
Andrei Warkentind3a8d952011-04-11 16:13:43 -0500994 ext_csd_bits[idx][0],
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +0900995 card->ext_csd.generic_cmd6_time);
Aries Lee22113ef2010-12-15 08:14:24 +0100996 if (!err) {
Philip Rakity4c4cb172011-05-13 11:17:18 +0530997 mmc_set_bus_width(card->host, bus_width);
Philip Rakity08ee80c2011-05-24 18:14:58 -0700998
Aries Lee22113ef2010-12-15 08:14:24 +0100999 /*
1000 * If controller can't handle bus width test,
Philip Rakity08ee80c2011-05-24 18:14:58 -07001001 * compare ext_csd previously read in 1 bit mode
1002 * against ext_csd at new bus width
Aries Lee22113ef2010-12-15 08:14:24 +01001003 */
1004 if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
Philip Rakity08ee80c2011-05-24 18:14:58 -07001005 err = mmc_compare_ext_csds(card,
Philip Rakity08ee80c2011-05-24 18:14:58 -07001006 bus_width);
1007 else
1008 err = mmc_bus_test(card, bus_width);
Aries Lee22113ef2010-12-15 08:14:24 +01001009 if (!err)
1010 break;
1011 }
Jarkko Lavinenb30f8af2008-11-17 14:35:21 +02001012 }
1013
Aries Lee22113ef2010-12-15 08:14:24 +01001014 if (!err && ddr) {
Girish K Sb87d8db2011-09-23 20:41:47 +05301015 err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
1016 ext_csd);
1017 if (err)
1018 pr_err("%s: power class selection to "
1019 "bus width %d ddr %d failed\n",
1020 mmc_hostname(card->host),
1021 1 << bus_width, ddr);
1022
Aries Lee22113ef2010-12-15 08:14:24 +01001023 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
Andrei Warkentind3a8d952011-04-11 16:13:43 -05001024 EXT_CSD_BUS_WIDTH,
1025 ext_csd_bits[idx][1],
Seungwon Jeonb23cf0b2011-09-23 14:15:29 +09001026 card->ext_csd.generic_cmd6_time);
Aries Lee22113ef2010-12-15 08:14:24 +01001027 }
Adrian Hunteref0b27d2009-09-22 16:44:37 -07001028 if (err) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301029 pr_warning("%s: switch to bus width %d ddr %d "
Aries Lee22113ef2010-12-15 08:14:24 +01001030 "failed\n", mmc_hostname(card->host),
1031 1 << bus_width, ddr);
1032 goto free_card;
1033 } else if (ddr) {
Philip Rakity4c4cb172011-05-13 11:17:18 +05301034 /*
1035 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
1036 * signaling.
1037 *
1038 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
1039 *
1040 * 1.8V vccq at 3.3V core voltage (vcc) is not required
1041 * in the JEDEC spec for DDR.
1042 *
1043 * Do not force change in vccq since we are obviously
1044 * working and no change to vccq is needed.
1045 *
1046 * WARNING: eMMC rules are NOT the same as SD DDR
1047 */
1048 if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
1049 err = mmc_set_signal_voltage(host,
1050 MMC_SIGNAL_VOLTAGE_120, 0);
1051 if (err)
1052 goto err;
1053 }
Aries Lee22113ef2010-12-15 08:14:24 +01001054 mmc_card_set_ddr_mode(card);
Philip Rakity4c4cb172011-05-13 11:17:18 +05301055 mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
1056 mmc_set_bus_width(card->host, bus_width);
Adrian Hunteref0b27d2009-09-22 16:44:37 -07001057 }
Pierre Ossman89a73cf2007-05-01 15:08:30 +02001058 }
1059
Seungwon Jeon881d1c22011-10-14 14:03:21 +09001060 /*
1061 * If cache size is higher than 0, this indicates
1062 * the existence of cache and it can be turned on.
1063 */
1064 if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
1065 card->ext_csd.cache_size > 0) {
1066 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1067 EXT_CSD_CACHE_CTRL, 1, 0);
1068 if (err && err != -EBADMSG)
1069 goto free_card;
1070
1071 /*
1072 * Only if no error, cache is turned on successfully.
1073 */
1074 card->ext_csd.cache_ctrl = err ? 0 : 1;
1075 }
1076
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001077 if (!oldcard)
1078 host->card = card;
1079
Philip Rakity08ee80c2011-05-24 18:14:58 -07001080 mmc_free_ext_csd(ext_csd);
Pierre Ossman17b04292007-07-22 22:18:46 +02001081 return 0;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001082
1083free_card:
1084 if (!oldcard)
1085 mmc_remove_card(card);
1086err:
Philip Rakity08ee80c2011-05-24 18:14:58 -07001087 mmc_free_ext_csd(ext_csd);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001088
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001089 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001090}
1091
1092/*
1093 * Host is being removed. Free up the current card.
1094 */
1095static void mmc_remove(struct mmc_host *host)
1096{
1097 BUG_ON(!host);
1098 BUG_ON(!host->card);
1099
1100 mmc_remove_card(host->card);
1101 host->card = NULL;
1102}
1103
1104/*
1105 * Card detection callback from host.
1106 */
1107static void mmc_detect(struct mmc_host *host)
1108{
1109 int err;
1110
1111 BUG_ON(!host);
1112 BUG_ON(!host->card);
1113
1114 mmc_claim_host(host);
1115
1116 /*
1117 * Just check if our card has been removed.
1118 */
1119 err = mmc_send_status(host->card, NULL);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001120
1121 mmc_release_host(host);
1122
Pierre Ossman17b04292007-07-22 22:18:46 +02001123 if (err) {
Pierre Ossman4101c162007-05-19 13:39:01 +02001124 mmc_remove(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001125
1126 mmc_claim_host(host);
1127 mmc_detach_bus(host);
Ulf Hansson7f7e4122011-09-21 14:08:13 -04001128 mmc_power_off(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001129 mmc_release_host(host);
1130 }
1131}
1132
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001133/*
1134 * Suspend callback from host.
1135 */
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001136static int mmc_suspend(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001137{
Balaji T Kc3805462011-09-08 22:08:39 +05301138 int err = 0;
1139
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001140 BUG_ON(!host);
1141 BUG_ON(!host->card);
1142
1143 mmc_claim_host(host);
Balaji T Kc3805462011-09-08 22:08:39 +05301144 if (mmc_card_can_sleep(host))
1145 err = mmc_card_sleep(host);
1146 else if (!mmc_host_is_spi(host))
David Brownellaf517152007-08-08 09:11:32 -07001147 mmc_deselect_cards(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001148 host->card->state &= ~MMC_STATE_HIGHSPEED;
1149 mmc_release_host(host);
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001150
Balaji T Kc3805462011-09-08 22:08:39 +05301151 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001152}
1153
1154/*
1155 * Resume callback from host.
1156 *
1157 * This function tries to determine if the same card is still present
1158 * and, if so, restore all state to it.
1159 */
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001160static int mmc_resume(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001161{
1162 int err;
1163
1164 BUG_ON(!host);
1165 BUG_ON(!host->card);
1166
1167 mmc_claim_host(host);
Pierre Ossman8c75dea2007-05-19 16:14:43 +02001168 err = mmc_init_card(host, host->ocr, host->card);
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001169 mmc_release_host(host);
1170
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001171 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001172}
1173
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001174static int mmc_power_restore(struct mmc_host *host)
Adrian Huntereae1aee2009-09-22 16:44:33 -07001175{
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001176 int ret;
1177
Adrian Huntereae1aee2009-09-22 16:44:33 -07001178 host->card->state &= ~MMC_STATE_HIGHSPEED;
1179 mmc_claim_host(host);
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001180 ret = mmc_init_card(host, host->ocr, host->card);
Adrian Huntereae1aee2009-09-22 16:44:33 -07001181 mmc_release_host(host);
Ohad Ben-Cohen12ae6372010-10-02 13:54:06 +02001182
1183 return ret;
Adrian Huntereae1aee2009-09-22 16:44:33 -07001184}
1185
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001186static int mmc_sleep(struct mmc_host *host)
1187{
1188 struct mmc_card *card = host->card;
1189 int err = -ENOSYS;
1190
1191 if (card && card->ext_csd.rev >= 3) {
1192 err = mmc_card_sleepawake(host, 1);
1193 if (err < 0)
1194 pr_debug("%s: Error %d while putting card into sleep",
1195 mmc_hostname(host), err);
1196 }
1197
1198 return err;
1199}
1200
1201static int mmc_awake(struct mmc_host *host)
1202{
1203 struct mmc_card *card = host->card;
1204 int err = -ENOSYS;
1205
1206 if (card && card->ext_csd.rev >= 3) {
1207 err = mmc_card_sleepawake(host, 0);
1208 if (err < 0)
1209 pr_debug("%s: Error %d while awaking sleeping card",
1210 mmc_hostname(host), err);
1211 }
1212
1213 return err;
1214}
1215
Adrian Hunter9feae242009-09-22 16:44:32 -07001216static const struct mmc_bus_ops mmc_ops = {
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001217 .awake = mmc_awake,
1218 .sleep = mmc_sleep,
Adrian Hunter9feae242009-09-22 16:44:32 -07001219 .remove = mmc_remove,
1220 .detect = mmc_detect,
1221 .suspend = NULL,
1222 .resume = NULL,
Adrian Huntereae1aee2009-09-22 16:44:33 -07001223 .power_restore = mmc_power_restore,
Adrian Hunter9feae242009-09-22 16:44:32 -07001224};
1225
1226static const struct mmc_bus_ops mmc_ops_unsafe = {
Jarkko Lavinenb1ebe382009-09-22 16:44:34 -07001227 .awake = mmc_awake,
1228 .sleep = mmc_sleep,
Adrian Hunter9feae242009-09-22 16:44:32 -07001229 .remove = mmc_remove,
1230 .detect = mmc_detect,
1231 .suspend = mmc_suspend,
1232 .resume = mmc_resume,
Adrian Huntereae1aee2009-09-22 16:44:33 -07001233 .power_restore = mmc_power_restore,
Adrian Hunter9feae242009-09-22 16:44:32 -07001234};
1235
1236static void mmc_attach_bus_ops(struct mmc_host *host)
1237{
1238 const struct mmc_bus_ops *bus_ops;
1239
Matt Fleming71d7d3d2010-09-27 09:42:19 +01001240 if (!mmc_card_is_removable(host))
Adrian Hunter9feae242009-09-22 16:44:32 -07001241 bus_ops = &mmc_ops_unsafe;
1242 else
1243 bus_ops = &mmc_ops;
1244 mmc_attach_bus(host, bus_ops);
1245}
1246
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001247/*
1248 * Starting point for MMC card init.
1249 */
Andy Ross807e8e42011-01-03 10:36:56 -08001250int mmc_attach_mmc(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001251{
1252 int err;
Andy Ross807e8e42011-01-03 10:36:56 -08001253 u32 ocr;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001254
1255 BUG_ON(!host);
Pierre Ossmand84075c82007-08-09 13:23:56 +02001256 WARN_ON(!host->claimed);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001257
Stefan Nilsson XK44669032011-09-15 17:50:38 +02001258 /* Set correct bus mode for MMC before attempting attach */
1259 if (!mmc_host_is_spi(host))
1260 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
1261
Andy Ross807e8e42011-01-03 10:36:56 -08001262 err = mmc_send_op_cond(host, 0, &ocr);
1263 if (err)
1264 return err;
1265
Adrian Hunter9feae242009-09-22 16:44:32 -07001266 mmc_attach_bus_ops(host);
Takashi Iwai8f230f42010-12-08 10:04:30 +01001267 if (host->ocr_avail_mmc)
1268 host->ocr_avail = host->ocr_avail_mmc;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001269
1270 /*
David Brownellaf517152007-08-08 09:11:32 -07001271 * We need to get OCR a different way for SPI.
1272 */
1273 if (mmc_host_is_spi(host)) {
1274 err = mmc_spi_read_ocr(host, 1, &ocr);
1275 if (err)
1276 goto err;
1277 }
1278
1279 /*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001280 * Sanity check the voltages that the card claims to
1281 * support.
1282 */
1283 if (ocr & 0x7F) {
Girish K Sa3c76eb2011-10-11 11:44:09 +05301284 pr_warning("%s: card claims to support voltages "
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001285 "below the defined range. These will be ignored.\n",
1286 mmc_hostname(host));
1287 ocr &= ~0x7F;
1288 }
1289
1290 host->ocr = mmc_select_voltage(host, ocr);
1291
1292 /*
1293 * Can we support the voltage of the card?
1294 */
Pierre Ossman109b5be2007-07-23 00:12:10 +02001295 if (!host->ocr) {
1296 err = -EINVAL;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001297 goto err;
Pierre Ossman109b5be2007-07-23 00:12:10 +02001298 }
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001299
1300 /*
1301 * Detect and init the card.
1302 */
Pierre Ossman8c75dea2007-05-19 16:14:43 +02001303 err = mmc_init_card(host, host->ocr, NULL);
Pierre Ossman17b04292007-07-22 22:18:46 +02001304 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001305 goto err;
1306
1307 mmc_release_host(host);
Pierre Ossman4101c162007-05-19 13:39:01 +02001308 err = mmc_add_card(host->card);
Andy Ross807e8e42011-01-03 10:36:56 -08001309 mmc_claim_host(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001310 if (err)
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001311 goto remove_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001312
1313 return 0;
1314
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001315remove_card:
Andy Ross807e8e42011-01-03 10:36:56 -08001316 mmc_release_host(host);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001317 mmc_remove_card(host->card);
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001318 mmc_claim_host(host);
Andy Ross807e8e42011-01-03 10:36:56 -08001319 host->card = NULL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001320err:
1321 mmc_detach_bus(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001322
Girish K Sa3c76eb2011-10-11 11:44:09 +05301323 pr_err("%s: error %d whilst initialising MMC card\n",
Pierre Ossman109b5be2007-07-23 00:12:10 +02001324 mmc_hostname(host), err);
1325
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001326 return err;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001327}