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Commit | Line | Data |
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7ea239d9 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/core/mmc.c |
7ea239d9 PO |
3 | * |
4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5 | * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. | |
6 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/err.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
7ea239d9 PO |
15 | |
16 | #include <linux/mmc/host.h> | |
17 | #include <linux/mmc/card.h> | |
18 | #include <linux/mmc/mmc.h> | |
19 | ||
20 | #include "core.h" | |
4101c16a | 21 | #include "bus.h" |
7ea239d9 PO |
22 | #include "mmc_ops.h" |
23 | ||
24 | static const unsigned int tran_exp[] = { | |
25 | 10000, 100000, 1000000, 10000000, | |
26 | 0, 0, 0, 0 | |
27 | }; | |
28 | ||
29 | static const unsigned char tran_mant[] = { | |
30 | 0, 10, 12, 13, 15, 20, 25, 30, | |
31 | 35, 40, 45, 50, 55, 60, 70, 80, | |
32 | }; | |
33 | ||
34 | static const unsigned int tacc_exp[] = { | |
35 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
36 | }; | |
37 | ||
38 | static const unsigned int tacc_mant[] = { | |
39 | 0, 10, 12, 13, 15, 20, 25, 30, | |
40 | 35, 40, 45, 50, 55, 60, 70, 80, | |
41 | }; | |
42 | ||
43 | #define UNSTUFF_BITS(resp,start,size) \ | |
44 | ({ \ | |
45 | const int __size = size; \ | |
46 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
47 | const int __off = 3 - ((start) / 32); \ | |
48 | const int __shft = (start) & 31; \ | |
49 | u32 __res; \ | |
50 | \ | |
51 | __res = resp[__off] >> __shft; \ | |
52 | if (__size + __shft > 32) \ | |
53 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
54 | __res & __mask; \ | |
55 | }) | |
56 | ||
57 | /* | |
58 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
59 | */ | |
bd766312 | 60 | static int mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
61 | { |
62 | u32 *resp = card->raw_cid; | |
63 | ||
64 | /* | |
65 | * The selection of the format here is based upon published | |
66 | * specs from sandisk and from what people have reported. | |
67 | */ | |
68 | switch (card->csd.mmca_vsn) { | |
69 | case 0: /* MMC v1.0 - v1.2 */ | |
70 | case 1: /* MMC v1.4 */ | |
71 | card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); | |
72 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
73 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
74 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
75 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
76 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
77 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
78 | card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); | |
79 | card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); | |
80 | card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); | |
81 | card->cid.serial = UNSTUFF_BITS(resp, 16, 24); | |
82 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
83 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
84 | break; | |
85 | ||
86 | case 2: /* MMC v2.0 - v2.2 */ | |
87 | case 3: /* MMC v3.1 - v3.3 */ | |
88 | case 4: /* MMC v4 */ | |
89 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
90 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
91 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
92 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
93 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
94 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
95 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
96 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
97 | card->cid.serial = UNSTUFF_BITS(resp, 16, 32); | |
98 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
99 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
100 | break; | |
101 | ||
102 | default: | |
facba917 | 103 | printk(KERN_ERR "%s: card has unknown MMCA version %d\n", |
7ea239d9 | 104 | mmc_hostname(card->host), card->csd.mmca_vsn); |
bd766312 | 105 | return -EINVAL; |
7ea239d9 | 106 | } |
bd766312 PO |
107 | |
108 | return 0; | |
7ea239d9 PO |
109 | } |
110 | ||
dfe86cba AH |
111 | static void mmc_set_erase_size(struct mmc_card *card) |
112 | { | |
113 | if (card->ext_csd.erase_group_def & 1) | |
114 | card->erase_size = card->ext_csd.hc_erase_size; | |
115 | else | |
116 | card->erase_size = card->csd.erase_size; | |
117 | ||
118 | mmc_init_erase(card); | |
119 | } | |
120 | ||
7ea239d9 PO |
121 | /* |
122 | * Given a 128-bit response, decode to our card CSD structure. | |
123 | */ | |
bd766312 | 124 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
125 | { |
126 | struct mmc_csd *csd = &card->csd; | |
dfe86cba | 127 | unsigned int e, m, a, b; |
7ea239d9 PO |
128 | u32 *resp = card->raw_csd; |
129 | ||
130 | /* | |
131 | * We only understand CSD structure v1.1 and v1.2. | |
132 | * v1.2 has extra information in bits 15, 11 and 10. | |
6da24b78 | 133 | * We also support eMMC v4.4 & v4.41. |
7ea239d9 | 134 | */ |
6da24b78 KP |
135 | csd->structure = UNSTUFF_BITS(resp, 126, 2); |
136 | if (csd->structure == 0) { | |
facba917 | 137 | printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", |
6da24b78 | 138 | mmc_hostname(card->host), csd->structure); |
bd766312 | 139 | return -EINVAL; |
7ea239d9 PO |
140 | } |
141 | ||
142 | csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); | |
143 | m = UNSTUFF_BITS(resp, 115, 4); | |
144 | e = UNSTUFF_BITS(resp, 112, 3); | |
145 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
146 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
147 | ||
148 | m = UNSTUFF_BITS(resp, 99, 4); | |
149 | e = UNSTUFF_BITS(resp, 96, 3); | |
150 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
151 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
152 | ||
153 | e = UNSTUFF_BITS(resp, 47, 3); | |
154 | m = UNSTUFF_BITS(resp, 62, 12); | |
155 | csd->capacity = (1 + m) << (e + 2); | |
156 | ||
157 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
158 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
159 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
160 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
161 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
162 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
163 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
bd766312 | 164 | |
dfe86cba AH |
165 | if (csd->write_blkbits >= 9) { |
166 | a = UNSTUFF_BITS(resp, 42, 5); | |
167 | b = UNSTUFF_BITS(resp, 37, 5); | |
168 | csd->erase_size = (a + 1) * (b + 1); | |
169 | csd->erase_size <<= csd->write_blkbits - 9; | |
170 | } | |
171 | ||
bd766312 | 172 | return 0; |
7ea239d9 PO |
173 | } |
174 | ||
175 | /* | |
89a73cf5 | 176 | * Read and decode extended CSD. |
7ea239d9 | 177 | */ |
89a73cf5 | 178 | static int mmc_read_ext_csd(struct mmc_card *card) |
7ea239d9 PO |
179 | { |
180 | int err; | |
181 | u8 *ext_csd; | |
182 | ||
183 | BUG_ON(!card); | |
184 | ||
7ea239d9 | 185 | if (card->csd.mmca_vsn < CSD_SPEC_VER_4) |
17b0429d | 186 | return 0; |
7ea239d9 PO |
187 | |
188 | /* | |
189 | * As the ext_csd is so large and mostly unused, we don't store the | |
190 | * raw block in mmc_card. | |
191 | */ | |
192 | ext_csd = kmalloc(512, GFP_KERNEL); | |
193 | if (!ext_csd) { | |
194 | printk(KERN_ERR "%s: could not allocate a buffer to " | |
adf66a0d | 195 | "receive the ext_csd.\n", mmc_hostname(card->host)); |
17b0429d | 196 | return -ENOMEM; |
7ea239d9 PO |
197 | } |
198 | ||
199 | err = mmc_send_ext_csd(card, ext_csd); | |
17b0429d | 200 | if (err) { |
d08ebedd WM |
201 | /* If the host or the card can't do the switch, |
202 | * fail more gracefully. */ | |
203 | if ((err != -EINVAL) | |
204 | && (err != -ENOSYS) | |
205 | && (err != -EFAULT)) | |
adf66a0d PO |
206 | goto out; |
207 | ||
7ea239d9 PO |
208 | /* |
209 | * High capacity cards should have this "magic" size | |
210 | * stored in their CSD. | |
211 | */ | |
212 | if (card->csd.capacity == (4096 * 512)) { | |
213 | printk(KERN_ERR "%s: unable to read EXT_CSD " | |
214 | "on a possible high capacity card. " | |
215 | "Card will be ignored.\n", | |
216 | mmc_hostname(card->host)); | |
217 | } else { | |
218 | printk(KERN_WARNING "%s: unable to read " | |
219 | "EXT_CSD, performance might " | |
220 | "suffer.\n", | |
221 | mmc_hostname(card->host)); | |
17b0429d | 222 | err = 0; |
7ea239d9 | 223 | } |
adf66a0d | 224 | |
7ea239d9 PO |
225 | goto out; |
226 | } | |
227 | ||
6da24b78 KP |
228 | /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ |
229 | if (card->csd.structure == 3) { | |
230 | int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE]; | |
231 | if (ext_csd_struct > 2) { | |
232 | printk(KERN_ERR "%s: unrecognised EXT_CSD structure " | |
233 | "version %d\n", mmc_hostname(card->host), | |
234 | ext_csd_struct); | |
235 | err = -EINVAL; | |
236 | goto out; | |
237 | } | |
238 | } | |
239 | ||
b1ebe384 | 240 | card->ext_csd.rev = ext_csd[EXT_CSD_REV]; |
11723ab1 | 241 | if (card->ext_csd.rev > 5) { |
6da24b78 KP |
242 | printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n", |
243 | mmc_hostname(card->host), card->ext_csd.rev); | |
00cedfa6 FM |
244 | err = -EINVAL; |
245 | goto out; | |
d7604d76 PO |
246 | } |
247 | ||
b1ebe384 | 248 | if (card->ext_csd.rev >= 2) { |
d7604d76 PO |
249 | card->ext_csd.sectors = |
250 | ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | | |
251 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | | |
252 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | | |
253 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; | |
fc8a0985 HP |
254 | |
255 | /* Cards with density > 2GiB are sector addressed */ | |
256 | if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) | |
d7604d76 PO |
257 | mmc_card_set_blockaddr(card); |
258 | } | |
7ea239d9 | 259 | |
7198f3c9 | 260 | switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { |
dfc13e84 HP |
261 | case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | |
262 | EXT_CSD_CARD_TYPE_26: | |
263 | card->ext_csd.hs_max_dtr = 52000000; | |
264 | card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; | |
265 | break; | |
266 | case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | | |
267 | EXT_CSD_CARD_TYPE_26: | |
268 | card->ext_csd.hs_max_dtr = 52000000; | |
269 | card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; | |
270 | break; | |
271 | case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | | |
272 | EXT_CSD_CARD_TYPE_26: | |
273 | card->ext_csd.hs_max_dtr = 52000000; | |
274 | card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; | |
275 | break; | |
7ea239d9 PO |
276 | case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: |
277 | card->ext_csd.hs_max_dtr = 52000000; | |
278 | break; | |
279 | case EXT_CSD_CARD_TYPE_26: | |
280 | card->ext_csd.hs_max_dtr = 26000000; | |
281 | break; | |
282 | default: | |
283 | /* MMC v4 spec says this cannot happen */ | |
284 | printk(KERN_WARNING "%s: card is mmc v4 but doesn't " | |
285 | "support any high-speed modes.\n", | |
286 | mmc_hostname(card->host)); | |
7ea239d9 PO |
287 | } |
288 | ||
b1ebe384 JL |
289 | if (card->ext_csd.rev >= 3) { |
290 | u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; | |
291 | ||
292 | /* Sleep / awake timeout in 100ns units */ | |
293 | if (sa_shift > 0 && sa_shift <= 0x17) | |
294 | card->ext_csd.sa_timeout = | |
295 | 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; | |
dfe86cba AH |
296 | card->ext_csd.erase_group_def = |
297 | ext_csd[EXT_CSD_ERASE_GROUP_DEF]; | |
298 | card->ext_csd.hc_erase_timeout = 300 * | |
299 | ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; | |
300 | card->ext_csd.hc_erase_size = | |
301 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; | |
302 | } | |
303 | ||
304 | if (card->ext_csd.rev >= 4) { | |
709de99d CD |
305 | /* |
306 | * Enhanced area feature support -- check whether the eMMC | |
307 | * card has the Enhanced area enabled. If so, export enhanced | |
308 | * area offset and size to user by adding sysfs interface. | |
309 | */ | |
310 | if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && | |
311 | (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { | |
312 | u8 hc_erase_grp_sz = | |
313 | ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; | |
314 | u8 hc_wp_grp_sz = | |
315 | ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; | |
316 | ||
317 | card->ext_csd.enhanced_area_en = 1; | |
318 | /* | |
319 | * calculate the enhanced data area offset, in bytes | |
320 | */ | |
321 | card->ext_csd.enhanced_area_offset = | |
322 | (ext_csd[139] << 24) + (ext_csd[138] << 16) + | |
323 | (ext_csd[137] << 8) + ext_csd[136]; | |
324 | if (mmc_card_blockaddr(card)) | |
325 | card->ext_csd.enhanced_area_offset <<= 9; | |
326 | /* | |
327 | * calculate the enhanced data area size, in kilobytes | |
328 | */ | |
329 | card->ext_csd.enhanced_area_size = | |
330 | (ext_csd[142] << 16) + (ext_csd[141] << 8) + | |
331 | ext_csd[140]; | |
332 | card->ext_csd.enhanced_area_size *= | |
333 | (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); | |
334 | card->ext_csd.enhanced_area_size <<= 9; | |
335 | } else { | |
336 | /* | |
337 | * If the enhanced area is not enabled, disable these | |
338 | * device attributes. | |
339 | */ | |
340 | card->ext_csd.enhanced_area_offset = -EINVAL; | |
341 | card->ext_csd.enhanced_area_size = -EINVAL; | |
342 | } | |
dfe86cba AH |
343 | card->ext_csd.sec_trim_mult = |
344 | ext_csd[EXT_CSD_SEC_TRIM_MULT]; | |
345 | card->ext_csd.sec_erase_mult = | |
346 | ext_csd[EXT_CSD_SEC_ERASE_MULT]; | |
347 | card->ext_csd.sec_feature_support = | |
348 | ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; | |
349 | card->ext_csd.trim_timeout = 300 * | |
350 | ext_csd[EXT_CSD_TRIM_MULT]; | |
b1ebe384 JL |
351 | } |
352 | ||
dfe86cba AH |
353 | if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) |
354 | card->erased_byte = 0xFF; | |
355 | else | |
356 | card->erased_byte = 0x0; | |
357 | ||
7ea239d9 PO |
358 | out: |
359 | kfree(ext_csd); | |
360 | ||
361 | return err; | |
362 | } | |
363 | ||
51ec92e2 PO |
364 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
365 | card->raw_cid[2], card->raw_cid[3]); | |
366 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
367 | card->raw_csd[2], card->raw_csd[3]); | |
368 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
369 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
370 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
371 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
372 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
373 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
374 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
375 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
376 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
709de99d CD |
377 | MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", |
378 | card->ext_csd.enhanced_area_offset); | |
379 | MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); | |
51ec92e2 PO |
380 | |
381 | static struct attribute *mmc_std_attrs[] = { | |
382 | &dev_attr_cid.attr, | |
383 | &dev_attr_csd.attr, | |
384 | &dev_attr_date.attr, | |
dfe86cba AH |
385 | &dev_attr_erase_size.attr, |
386 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
387 | &dev_attr_fwrev.attr, |
388 | &dev_attr_hwrev.attr, | |
389 | &dev_attr_manfid.attr, | |
390 | &dev_attr_name.attr, | |
391 | &dev_attr_oemid.attr, | |
392 | &dev_attr_serial.attr, | |
709de99d CD |
393 | &dev_attr_enhanced_area_offset.attr, |
394 | &dev_attr_enhanced_area_size.attr, | |
51ec92e2 PO |
395 | NULL, |
396 | }; | |
397 | ||
398 | static struct attribute_group mmc_std_attr_group = { | |
399 | .attrs = mmc_std_attrs, | |
400 | }; | |
401 | ||
a4dbd674 | 402 | static const struct attribute_group *mmc_attr_groups[] = { |
51ec92e2 PO |
403 | &mmc_std_attr_group, |
404 | NULL, | |
405 | }; | |
406 | ||
407 | static struct device_type mmc_type = { | |
408 | .groups = mmc_attr_groups, | |
409 | }; | |
410 | ||
7ea239d9 | 411 | /* |
6abaa0c9 PO |
412 | * Handle the detection and initialisation of a card. |
413 | * | |
8769392b | 414 | * In the case of a resume, "oldcard" will contain the card |
6abaa0c9 | 415 | * we're trying to reinitialise. |
7ea239d9 | 416 | */ |
8c75deae | 417 | static int mmc_init_card(struct mmc_host *host, u32 ocr, |
6abaa0c9 | 418 | struct mmc_card *oldcard) |
7ea239d9 PO |
419 | { |
420 | struct mmc_card *card; | |
25d5c699 | 421 | int err, ddr = 0; |
7ea239d9 PO |
422 | u32 cid[4]; |
423 | unsigned int max_dtr; | |
b676f039 | 424 | u32 rocr; |
7ea239d9 PO |
425 | |
426 | BUG_ON(!host); | |
d84075c8 | 427 | WARN_ON(!host->claimed); |
7ea239d9 | 428 | |
7ea239d9 PO |
429 | /* |
430 | * Since we're changing the OCR value, we seem to | |
431 | * need to tell some cards to go back to the idle | |
432 | * state. We wait 1ms to give cards time to | |
433 | * respond. | |
434 | */ | |
435 | mmc_go_idle(host); | |
436 | ||
437 | /* The extra bit indicates that we support high capacity */ | |
b676f039 | 438 | err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); |
17b0429d | 439 | if (err) |
6abaa0c9 | 440 | goto err; |
7ea239d9 | 441 | |
af517150 DB |
442 | /* |
443 | * For SPI, enable CRC as appropriate. | |
444 | */ | |
445 | if (mmc_host_is_spi(host)) { | |
446 | err = mmc_spi_set_crc(host, use_spi_crc); | |
447 | if (err) | |
448 | goto err; | |
449 | } | |
450 | ||
7ea239d9 PO |
451 | /* |
452 | * Fetch CID from card. | |
453 | */ | |
af517150 DB |
454 | if (mmc_host_is_spi(host)) |
455 | err = mmc_send_cid(host, cid); | |
456 | else | |
457 | err = mmc_all_send_cid(host, cid); | |
17b0429d | 458 | if (err) |
7ea239d9 PO |
459 | goto err; |
460 | ||
6abaa0c9 | 461 | if (oldcard) { |
adf66a0d PO |
462 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
463 | err = -ENOENT; | |
6abaa0c9 | 464 | goto err; |
adf66a0d | 465 | } |
6abaa0c9 PO |
466 | |
467 | card = oldcard; | |
468 | } else { | |
469 | /* | |
470 | * Allocate card structure. | |
471 | */ | |
51ec92e2 | 472 | card = mmc_alloc_card(host, &mmc_type); |
adf66a0d PO |
473 | if (IS_ERR(card)) { |
474 | err = PTR_ERR(card); | |
6abaa0c9 | 475 | goto err; |
adf66a0d | 476 | } |
7ea239d9 | 477 | |
6abaa0c9 PO |
478 | card->type = MMC_TYPE_MMC; |
479 | card->rca = 1; | |
480 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
481 | } | |
7ea239d9 PO |
482 | |
483 | /* | |
af517150 | 484 | * For native busses: set card RCA and quit open drain mode. |
7ea239d9 | 485 | */ |
af517150 DB |
486 | if (!mmc_host_is_spi(host)) { |
487 | err = mmc_set_relative_addr(card); | |
488 | if (err) | |
489 | goto free_card; | |
7ea239d9 | 490 | |
af517150 DB |
491 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
492 | } | |
7ea239d9 | 493 | |
6abaa0c9 PO |
494 | if (!oldcard) { |
495 | /* | |
496 | * Fetch CSD from card. | |
497 | */ | |
498 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 499 | if (err) |
6abaa0c9 | 500 | goto free_card; |
7ea239d9 | 501 | |
bd766312 | 502 | err = mmc_decode_csd(card); |
adf66a0d | 503 | if (err) |
bd766312 PO |
504 | goto free_card; |
505 | err = mmc_decode_cid(card); | |
adf66a0d | 506 | if (err) |
bd766312 | 507 | goto free_card; |
6abaa0c9 | 508 | } |
7ea239d9 PO |
509 | |
510 | /* | |
89a73cf5 | 511 | * Select card, as all following commands rely on that. |
7ea239d9 | 512 | */ |
af517150 DB |
513 | if (!mmc_host_is_spi(host)) { |
514 | err = mmc_select_card(card); | |
515 | if (err) | |
516 | goto free_card; | |
517 | } | |
7ea239d9 | 518 | |
6abaa0c9 PO |
519 | if (!oldcard) { |
520 | /* | |
af517150 | 521 | * Fetch and process extended CSD. |
6abaa0c9 PO |
522 | */ |
523 | err = mmc_read_ext_csd(card); | |
17b0429d | 524 | if (err) |
6abaa0c9 | 525 | goto free_card; |
b676f039 PR |
526 | |
527 | /* If doing byte addressing, check if required to do sector | |
528 | * addressing. Handle the case of <2GB cards needing sector | |
529 | * addressing. See section 8.1 JEDEC Standard JED84-A441; | |
530 | * ocr register has bit 30 set for sector addressing. | |
531 | */ | |
532 | if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) | |
533 | mmc_card_set_blockaddr(card); | |
534 | ||
dfe86cba AH |
535 | /* Erase size depends on CSD and Extended CSD */ |
536 | mmc_set_erase_size(card); | |
6abaa0c9 | 537 | } |
7ea239d9 | 538 | |
709de99d CD |
539 | /* |
540 | * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF | |
25985edc | 541 | * bit. This bit will be lost every time after a reset or power off. |
709de99d CD |
542 | */ |
543 | if (card->ext_csd.enhanced_area_en) { | |
544 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
545 | EXT_CSD_ERASE_GROUP_DEF, 1); | |
546 | ||
547 | if (err && err != -EBADMSG) | |
548 | goto free_card; | |
549 | ||
550 | if (err) { | |
551 | err = 0; | |
552 | /* | |
553 | * Just disable enhanced area off & sz | |
554 | * will try to enable ERASE_GROUP_DEF | |
555 | * during next time reinit | |
556 | */ | |
557 | card->ext_csd.enhanced_area_offset = -EINVAL; | |
558 | card->ext_csd.enhanced_area_size = -EINVAL; | |
559 | } else { | |
560 | card->ext_csd.erase_group_def = 1; | |
561 | /* | |
562 | * enable ERASE_GRP_DEF successfully. | |
563 | * This will affect the erase size, so | |
564 | * here need to reset erase size | |
565 | */ | |
566 | mmc_set_erase_size(card); | |
567 | } | |
568 | } | |
569 | ||
89a73cf5 PO |
570 | /* |
571 | * Activate high speed (if supported) | |
572 | */ | |
573 | if ((card->ext_csd.hs_max_dtr != 0) && | |
574 | (host->caps & MMC_CAP_MMC_HIGHSPEED)) { | |
575 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
576 | EXT_CSD_HS_TIMING, 1); | |
ef0b27d4 | 577 | if (err && err != -EBADMSG) |
89a73cf5 PO |
578 | goto free_card; |
579 | ||
ef0b27d4 AH |
580 | if (err) { |
581 | printk(KERN_WARNING "%s: switch to highspeed failed\n", | |
582 | mmc_hostname(card->host)); | |
583 | err = 0; | |
584 | } else { | |
585 | mmc_card_set_highspeed(card); | |
586 | mmc_set_timing(card->host, MMC_TIMING_MMC_HS); | |
587 | } | |
89a73cf5 PO |
588 | } |
589 | ||
7ea239d9 PO |
590 | /* |
591 | * Compute bus speed. | |
592 | */ | |
593 | max_dtr = (unsigned int)-1; | |
594 | ||
595 | if (mmc_card_highspeed(card)) { | |
596 | if (max_dtr > card->ext_csd.hs_max_dtr) | |
597 | max_dtr = card->ext_csd.hs_max_dtr; | |
598 | } else if (max_dtr > card->csd.max_dtr) { | |
599 | max_dtr = card->csd.max_dtr; | |
600 | } | |
601 | ||
602 | mmc_set_clock(host, max_dtr); | |
603 | ||
dfc13e84 | 604 | /* |
0f8d8ea6 | 605 | * Indicate DDR mode (if supported). |
dfc13e84 HP |
606 | */ |
607 | if (mmc_card_highspeed(card)) { | |
608 | if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) | |
609 | && (host->caps & (MMC_CAP_1_8V_DDR))) | |
49e3b5a4 | 610 | ddr = MMC_1_8V_DDR_MODE; |
dfc13e84 HP |
611 | else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) |
612 | && (host->caps & (MMC_CAP_1_2V_DDR))) | |
49e3b5a4 | 613 | ddr = MMC_1_2V_DDR_MODE; |
dfc13e84 HP |
614 | } |
615 | ||
89a73cf5 | 616 | /* |
0f8d8ea6 | 617 | * Activate wide bus and DDR (if supported). |
89a73cf5 PO |
618 | */ |
619 | if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && | |
b30f8af3 | 620 | (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { |
22113efd AL |
621 | static unsigned ext_csd_bits[][2] = { |
622 | { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, | |
623 | { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, | |
624 | { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, | |
625 | }; | |
626 | static unsigned bus_widths[] = { | |
627 | MMC_BUS_WIDTH_8, | |
628 | MMC_BUS_WIDTH_4, | |
629 | MMC_BUS_WIDTH_1 | |
630 | }; | |
631 | unsigned idx, bus_width = 0; | |
632 | ||
633 | if (host->caps & MMC_CAP_8_BIT_DATA) | |
634 | idx = 0; | |
635 | else | |
636 | idx = 1; | |
637 | for (; idx < ARRAY_SIZE(bus_widths); idx++) { | |
638 | bus_width = bus_widths[idx]; | |
639 | if (bus_width == MMC_BUS_WIDTH_1) | |
640 | ddr = 0; /* no DDR for 1-bit width */ | |
641 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
642 | EXT_CSD_BUS_WIDTH, | |
643 | ext_csd_bits[idx][0]); | |
644 | if (!err) { | |
08c82dfa TI |
645 | mmc_set_bus_width_ddr(card->host, |
646 | bus_width, MMC_SDR_MODE); | |
22113efd AL |
647 | /* |
648 | * If controller can't handle bus width test, | |
649 | * use the highest bus width to maintain | |
650 | * compatibility with previous MMC behavior. | |
651 | */ | |
652 | if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) | |
653 | break; | |
22113efd AL |
654 | err = mmc_bus_test(card, bus_width); |
655 | if (!err) | |
656 | break; | |
657 | } | |
b30f8af3 JL |
658 | } |
659 | ||
22113efd AL |
660 | if (!err && ddr) { |
661 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
662 | EXT_CSD_BUS_WIDTH, | |
663 | ext_csd_bits[idx][1]); | |
664 | } | |
ef0b27d4 | 665 | if (err) { |
0f8d8ea6 | 666 | printk(KERN_WARNING "%s: switch to bus width %d ddr %d " |
22113efd AL |
667 | "failed\n", mmc_hostname(card->host), |
668 | 1 << bus_width, ddr); | |
669 | goto free_card; | |
670 | } else if (ddr) { | |
671 | mmc_card_set_ddr_mode(card); | |
0f8d8ea6 | 672 | mmc_set_bus_width_ddr(card->host, bus_width, ddr); |
ef0b27d4 | 673 | } |
89a73cf5 PO |
674 | } |
675 | ||
6abaa0c9 PO |
676 | if (!oldcard) |
677 | host->card = card; | |
678 | ||
17b0429d | 679 | return 0; |
6abaa0c9 PO |
680 | |
681 | free_card: | |
682 | if (!oldcard) | |
683 | mmc_remove_card(card); | |
684 | err: | |
685 | ||
adf66a0d | 686 | return err; |
6abaa0c9 PO |
687 | } |
688 | ||
689 | /* | |
690 | * Host is being removed. Free up the current card. | |
691 | */ | |
692 | static void mmc_remove(struct mmc_host *host) | |
693 | { | |
694 | BUG_ON(!host); | |
695 | BUG_ON(!host->card); | |
696 | ||
697 | mmc_remove_card(host->card); | |
698 | host->card = NULL; | |
699 | } | |
700 | ||
701 | /* | |
702 | * Card detection callback from host. | |
703 | */ | |
704 | static void mmc_detect(struct mmc_host *host) | |
705 | { | |
706 | int err; | |
707 | ||
708 | BUG_ON(!host); | |
709 | BUG_ON(!host->card); | |
710 | ||
711 | mmc_claim_host(host); | |
712 | ||
713 | /* | |
714 | * Just check if our card has been removed. | |
715 | */ | |
716 | err = mmc_send_status(host->card, NULL); | |
717 | ||
718 | mmc_release_host(host); | |
719 | ||
17b0429d | 720 | if (err) { |
4101c16a | 721 | mmc_remove(host); |
6abaa0c9 PO |
722 | |
723 | mmc_claim_host(host); | |
724 | mmc_detach_bus(host); | |
725 | mmc_release_host(host); | |
726 | } | |
727 | } | |
728 | ||
6abaa0c9 PO |
729 | /* |
730 | * Suspend callback from host. | |
731 | */ | |
95cdfb72 | 732 | static int mmc_suspend(struct mmc_host *host) |
6abaa0c9 PO |
733 | { |
734 | BUG_ON(!host); | |
735 | BUG_ON(!host->card); | |
7ea239d9 | 736 | |
6abaa0c9 | 737 | mmc_claim_host(host); |
af517150 DB |
738 | if (!mmc_host_is_spi(host)) |
739 | mmc_deselect_cards(host); | |
6abaa0c9 | 740 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
7ea239d9 | 741 | mmc_release_host(host); |
95cdfb72 NP |
742 | |
743 | return 0; | |
6abaa0c9 | 744 | } |
7ea239d9 | 745 | |
6abaa0c9 PO |
746 | /* |
747 | * Resume callback from host. | |
748 | * | |
749 | * This function tries to determine if the same card is still present | |
750 | * and, if so, restore all state to it. | |
751 | */ | |
95cdfb72 | 752 | static int mmc_resume(struct mmc_host *host) |
6abaa0c9 PO |
753 | { |
754 | int err; | |
755 | ||
756 | BUG_ON(!host); | |
757 | BUG_ON(!host->card); | |
758 | ||
759 | mmc_claim_host(host); | |
8c75deae | 760 | err = mmc_init_card(host, host->ocr, host->card); |
2986d0bf PO |
761 | mmc_release_host(host); |
762 | ||
95cdfb72 | 763 | return err; |
6abaa0c9 PO |
764 | } |
765 | ||
12ae637f | 766 | static int mmc_power_restore(struct mmc_host *host) |
eae1aeee | 767 | { |
12ae637f OBC |
768 | int ret; |
769 | ||
eae1aeee AH |
770 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
771 | mmc_claim_host(host); | |
12ae637f | 772 | ret = mmc_init_card(host, host->ocr, host->card); |
eae1aeee | 773 | mmc_release_host(host); |
12ae637f OBC |
774 | |
775 | return ret; | |
eae1aeee AH |
776 | } |
777 | ||
b1ebe384 JL |
778 | static int mmc_sleep(struct mmc_host *host) |
779 | { | |
780 | struct mmc_card *card = host->card; | |
781 | int err = -ENOSYS; | |
782 | ||
783 | if (card && card->ext_csd.rev >= 3) { | |
784 | err = mmc_card_sleepawake(host, 1); | |
785 | if (err < 0) | |
786 | pr_debug("%s: Error %d while putting card into sleep", | |
787 | mmc_hostname(host), err); | |
788 | } | |
789 | ||
790 | return err; | |
791 | } | |
792 | ||
793 | static int mmc_awake(struct mmc_host *host) | |
794 | { | |
795 | struct mmc_card *card = host->card; | |
796 | int err = -ENOSYS; | |
797 | ||
798 | if (card && card->ext_csd.rev >= 3) { | |
799 | err = mmc_card_sleepawake(host, 0); | |
800 | if (err < 0) | |
801 | pr_debug("%s: Error %d while awaking sleeping card", | |
802 | mmc_hostname(host), err); | |
803 | } | |
804 | ||
805 | return err; | |
806 | } | |
807 | ||
6abaa0c9 | 808 | static const struct mmc_bus_ops mmc_ops = { |
b1ebe384 JL |
809 | .awake = mmc_awake, |
810 | .sleep = mmc_sleep, | |
9feae246 AH |
811 | .remove = mmc_remove, |
812 | .detect = mmc_detect, | |
813 | .suspend = NULL, | |
814 | .resume = NULL, | |
eae1aeee | 815 | .power_restore = mmc_power_restore, |
9feae246 AH |
816 | }; |
817 | ||
818 | static const struct mmc_bus_ops mmc_ops_unsafe = { | |
b1ebe384 JL |
819 | .awake = mmc_awake, |
820 | .sleep = mmc_sleep, | |
6abaa0c9 PO |
821 | .remove = mmc_remove, |
822 | .detect = mmc_detect, | |
823 | .suspend = mmc_suspend, | |
824 | .resume = mmc_resume, | |
eae1aeee | 825 | .power_restore = mmc_power_restore, |
6abaa0c9 PO |
826 | }; |
827 | ||
9feae246 AH |
828 | static void mmc_attach_bus_ops(struct mmc_host *host) |
829 | { | |
830 | const struct mmc_bus_ops *bus_ops; | |
831 | ||
71d7d3d1 | 832 | if (!mmc_card_is_removable(host)) |
9feae246 AH |
833 | bus_ops = &mmc_ops_unsafe; |
834 | else | |
835 | bus_ops = &mmc_ops; | |
836 | mmc_attach_bus(host, bus_ops); | |
837 | } | |
838 | ||
6abaa0c9 PO |
839 | /* |
840 | * Starting point for MMC card init. | |
841 | */ | |
807e8e40 | 842 | int mmc_attach_mmc(struct mmc_host *host) |
6abaa0c9 PO |
843 | { |
844 | int err; | |
807e8e40 | 845 | u32 ocr; |
6abaa0c9 PO |
846 | |
847 | BUG_ON(!host); | |
d84075c8 | 848 | WARN_ON(!host->claimed); |
6abaa0c9 | 849 | |
807e8e40 AR |
850 | err = mmc_send_op_cond(host, 0, &ocr); |
851 | if (err) | |
852 | return err; | |
853 | ||
9feae246 | 854 | mmc_attach_bus_ops(host); |
8f230f45 TI |
855 | if (host->ocr_avail_mmc) |
856 | host->ocr_avail = host->ocr_avail_mmc; | |
6abaa0c9 | 857 | |
af517150 DB |
858 | /* |
859 | * We need to get OCR a different way for SPI. | |
860 | */ | |
861 | if (mmc_host_is_spi(host)) { | |
862 | err = mmc_spi_read_ocr(host, 1, &ocr); | |
863 | if (err) | |
864 | goto err; | |
865 | } | |
866 | ||
6abaa0c9 PO |
867 | /* |
868 | * Sanity check the voltages that the card claims to | |
869 | * support. | |
870 | */ | |
871 | if (ocr & 0x7F) { | |
872 | printk(KERN_WARNING "%s: card claims to support voltages " | |
873 | "below the defined range. These will be ignored.\n", | |
874 | mmc_hostname(host)); | |
875 | ocr &= ~0x7F; | |
876 | } | |
877 | ||
878 | host->ocr = mmc_select_voltage(host, ocr); | |
879 | ||
880 | /* | |
881 | * Can we support the voltage of the card? | |
882 | */ | |
109b5bed PO |
883 | if (!host->ocr) { |
884 | err = -EINVAL; | |
6abaa0c9 | 885 | goto err; |
109b5bed | 886 | } |
6abaa0c9 PO |
887 | |
888 | /* | |
889 | * Detect and init the card. | |
890 | */ | |
8c75deae | 891 | err = mmc_init_card(host, host->ocr, NULL); |
17b0429d | 892 | if (err) |
6abaa0c9 PO |
893 | goto err; |
894 | ||
895 | mmc_release_host(host); | |
4101c16a | 896 | err = mmc_add_card(host->card); |
807e8e40 | 897 | mmc_claim_host(host); |
7ea239d9 | 898 | if (err) |
2986d0bf | 899 | goto remove_card; |
7ea239d9 PO |
900 | |
901 | return 0; | |
902 | ||
2986d0bf | 903 | remove_card: |
807e8e40 | 904 | mmc_release_host(host); |
6abaa0c9 | 905 | mmc_remove_card(host->card); |
2986d0bf | 906 | mmc_claim_host(host); |
807e8e40 | 907 | host->card = NULL; |
7ea239d9 PO |
908 | err: |
909 | mmc_detach_bus(host); | |
7ea239d9 | 910 | |
109b5bed PO |
911 | printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", |
912 | mmc_hostname(host), err); | |
913 | ||
adf66a0d | 914 | return err; |
7ea239d9 | 915 | } |