Commit | Line | Data |
---|---|---|
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) { | |
305 | card->ext_csd.sec_trim_mult = | |
306 | ext_csd[EXT_CSD_SEC_TRIM_MULT]; | |
307 | card->ext_csd.sec_erase_mult = | |
308 | ext_csd[EXT_CSD_SEC_ERASE_MULT]; | |
309 | card->ext_csd.sec_feature_support = | |
310 | ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; | |
311 | card->ext_csd.trim_timeout = 300 * | |
312 | ext_csd[EXT_CSD_TRIM_MULT]; | |
b1ebe384 JL |
313 | } |
314 | ||
dfe86cba AH |
315 | if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) |
316 | card->erased_byte = 0xFF; | |
317 | else | |
318 | card->erased_byte = 0x0; | |
319 | ||
7ea239d9 PO |
320 | out: |
321 | kfree(ext_csd); | |
322 | ||
323 | return err; | |
324 | } | |
325 | ||
51ec92e2 PO |
326 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
327 | card->raw_cid[2], card->raw_cid[3]); | |
328 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
329 | card->raw_csd[2], card->raw_csd[3]); | |
330 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
331 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
332 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
333 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
334 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
335 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
336 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
337 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
338 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
339 | ||
340 | static struct attribute *mmc_std_attrs[] = { | |
341 | &dev_attr_cid.attr, | |
342 | &dev_attr_csd.attr, | |
343 | &dev_attr_date.attr, | |
dfe86cba AH |
344 | &dev_attr_erase_size.attr, |
345 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
346 | &dev_attr_fwrev.attr, |
347 | &dev_attr_hwrev.attr, | |
348 | &dev_attr_manfid.attr, | |
349 | &dev_attr_name.attr, | |
350 | &dev_attr_oemid.attr, | |
351 | &dev_attr_serial.attr, | |
352 | NULL, | |
353 | }; | |
354 | ||
355 | static struct attribute_group mmc_std_attr_group = { | |
356 | .attrs = mmc_std_attrs, | |
357 | }; | |
358 | ||
a4dbd674 | 359 | static const struct attribute_group *mmc_attr_groups[] = { |
51ec92e2 PO |
360 | &mmc_std_attr_group, |
361 | NULL, | |
362 | }; | |
363 | ||
364 | static struct device_type mmc_type = { | |
365 | .groups = mmc_attr_groups, | |
366 | }; | |
367 | ||
7ea239d9 | 368 | /* |
6abaa0c9 PO |
369 | * Handle the detection and initialisation of a card. |
370 | * | |
8769392b | 371 | * In the case of a resume, "oldcard" will contain the card |
6abaa0c9 | 372 | * we're trying to reinitialise. |
7ea239d9 | 373 | */ |
8c75deae | 374 | static int mmc_init_card(struct mmc_host *host, u32 ocr, |
6abaa0c9 | 375 | struct mmc_card *oldcard) |
7ea239d9 PO |
376 | { |
377 | struct mmc_card *card; | |
0f8d8ea6 | 378 | int err, ddr = 0; |
7ea239d9 PO |
379 | u32 cid[4]; |
380 | unsigned int max_dtr; | |
381 | ||
382 | BUG_ON(!host); | |
d84075c8 | 383 | WARN_ON(!host->claimed); |
7ea239d9 | 384 | |
7ea239d9 PO |
385 | /* |
386 | * Since we're changing the OCR value, we seem to | |
387 | * need to tell some cards to go back to the idle | |
388 | * state. We wait 1ms to give cards time to | |
389 | * respond. | |
390 | */ | |
391 | mmc_go_idle(host); | |
392 | ||
393 | /* The extra bit indicates that we support high capacity */ | |
6abaa0c9 | 394 | err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); |
17b0429d | 395 | if (err) |
6abaa0c9 | 396 | goto err; |
7ea239d9 | 397 | |
af517150 DB |
398 | /* |
399 | * For SPI, enable CRC as appropriate. | |
400 | */ | |
401 | if (mmc_host_is_spi(host)) { | |
402 | err = mmc_spi_set_crc(host, use_spi_crc); | |
403 | if (err) | |
404 | goto err; | |
405 | } | |
406 | ||
7ea239d9 PO |
407 | /* |
408 | * Fetch CID from card. | |
409 | */ | |
af517150 DB |
410 | if (mmc_host_is_spi(host)) |
411 | err = mmc_send_cid(host, cid); | |
412 | else | |
413 | err = mmc_all_send_cid(host, cid); | |
17b0429d | 414 | if (err) |
7ea239d9 PO |
415 | goto err; |
416 | ||
6abaa0c9 | 417 | if (oldcard) { |
adf66a0d PO |
418 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
419 | err = -ENOENT; | |
6abaa0c9 | 420 | goto err; |
adf66a0d | 421 | } |
6abaa0c9 PO |
422 | |
423 | card = oldcard; | |
424 | } else { | |
425 | /* | |
426 | * Allocate card structure. | |
427 | */ | |
51ec92e2 | 428 | card = mmc_alloc_card(host, &mmc_type); |
adf66a0d PO |
429 | if (IS_ERR(card)) { |
430 | err = PTR_ERR(card); | |
6abaa0c9 | 431 | goto err; |
adf66a0d | 432 | } |
7ea239d9 | 433 | |
6abaa0c9 PO |
434 | card->type = MMC_TYPE_MMC; |
435 | card->rca = 1; | |
436 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
437 | } | |
7ea239d9 PO |
438 | |
439 | /* | |
af517150 | 440 | * For native busses: set card RCA and quit open drain mode. |
7ea239d9 | 441 | */ |
af517150 DB |
442 | if (!mmc_host_is_spi(host)) { |
443 | err = mmc_set_relative_addr(card); | |
444 | if (err) | |
445 | goto free_card; | |
7ea239d9 | 446 | |
af517150 DB |
447 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
448 | } | |
7ea239d9 | 449 | |
6abaa0c9 PO |
450 | if (!oldcard) { |
451 | /* | |
452 | * Fetch CSD from card. | |
453 | */ | |
454 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 455 | if (err) |
6abaa0c9 | 456 | goto free_card; |
7ea239d9 | 457 | |
bd766312 | 458 | err = mmc_decode_csd(card); |
adf66a0d | 459 | if (err) |
bd766312 PO |
460 | goto free_card; |
461 | err = mmc_decode_cid(card); | |
adf66a0d | 462 | if (err) |
bd766312 | 463 | goto free_card; |
6abaa0c9 | 464 | } |
7ea239d9 PO |
465 | |
466 | /* | |
89a73cf5 | 467 | * Select card, as all following commands rely on that. |
7ea239d9 | 468 | */ |
af517150 DB |
469 | if (!mmc_host_is_spi(host)) { |
470 | err = mmc_select_card(card); | |
471 | if (err) | |
472 | goto free_card; | |
473 | } | |
7ea239d9 | 474 | |
6abaa0c9 PO |
475 | if (!oldcard) { |
476 | /* | |
af517150 | 477 | * Fetch and process extended CSD. |
6abaa0c9 PO |
478 | */ |
479 | err = mmc_read_ext_csd(card); | |
17b0429d | 480 | if (err) |
6abaa0c9 | 481 | goto free_card; |
dfe86cba AH |
482 | /* Erase size depends on CSD and Extended CSD */ |
483 | mmc_set_erase_size(card); | |
6abaa0c9 | 484 | } |
7ea239d9 | 485 | |
89a73cf5 PO |
486 | /* |
487 | * Activate high speed (if supported) | |
488 | */ | |
489 | if ((card->ext_csd.hs_max_dtr != 0) && | |
490 | (host->caps & MMC_CAP_MMC_HIGHSPEED)) { | |
491 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
492 | EXT_CSD_HS_TIMING, 1); | |
ef0b27d4 | 493 | if (err && err != -EBADMSG) |
89a73cf5 PO |
494 | goto free_card; |
495 | ||
ef0b27d4 AH |
496 | if (err) { |
497 | printk(KERN_WARNING "%s: switch to highspeed failed\n", | |
498 | mmc_hostname(card->host)); | |
499 | err = 0; | |
500 | } else { | |
501 | mmc_card_set_highspeed(card); | |
502 | mmc_set_timing(card->host, MMC_TIMING_MMC_HS); | |
503 | } | |
89a73cf5 PO |
504 | } |
505 | ||
7ea239d9 PO |
506 | /* |
507 | * Compute bus speed. | |
508 | */ | |
509 | max_dtr = (unsigned int)-1; | |
510 | ||
511 | if (mmc_card_highspeed(card)) { | |
512 | if (max_dtr > card->ext_csd.hs_max_dtr) | |
513 | max_dtr = card->ext_csd.hs_max_dtr; | |
514 | } else if (max_dtr > card->csd.max_dtr) { | |
515 | max_dtr = card->csd.max_dtr; | |
516 | } | |
517 | ||
518 | mmc_set_clock(host, max_dtr); | |
519 | ||
dfc13e84 | 520 | /* |
0f8d8ea6 | 521 | * Indicate DDR mode (if supported). |
dfc13e84 HP |
522 | */ |
523 | if (mmc_card_highspeed(card)) { | |
524 | if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) | |
525 | && (host->caps & (MMC_CAP_1_8V_DDR))) | |
0f8d8ea6 | 526 | ddr = 1; |
dfc13e84 HP |
527 | else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) |
528 | && (host->caps & (MMC_CAP_1_2V_DDR))) | |
0f8d8ea6 | 529 | ddr = 1; |
dfc13e84 HP |
530 | } |
531 | ||
89a73cf5 | 532 | /* |
0f8d8ea6 | 533 | * Activate wide bus and DDR (if supported). |
89a73cf5 PO |
534 | */ |
535 | if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && | |
b30f8af3 JL |
536 | (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { |
537 | unsigned ext_csd_bit, bus_width; | |
538 | ||
539 | if (host->caps & MMC_CAP_8_BIT_DATA) { | |
0f8d8ea6 | 540 | if (ddr) |
dfc13e84 HP |
541 | ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_8; |
542 | else | |
543 | ext_csd_bit = EXT_CSD_BUS_WIDTH_8; | |
b30f8af3 JL |
544 | bus_width = MMC_BUS_WIDTH_8; |
545 | } else { | |
0f8d8ea6 | 546 | if (ddr) |
dfc13e84 HP |
547 | ext_csd_bit = EXT_CSD_DDR_BUS_WIDTH_4; |
548 | else | |
549 | ext_csd_bit = EXT_CSD_BUS_WIDTH_4; | |
b30f8af3 JL |
550 | bus_width = MMC_BUS_WIDTH_4; |
551 | } | |
552 | ||
89a73cf5 | 553 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
b30f8af3 JL |
554 | EXT_CSD_BUS_WIDTH, ext_csd_bit); |
555 | ||
ef0b27d4 | 556 | if (err && err != -EBADMSG) |
89a73cf5 PO |
557 | goto free_card; |
558 | ||
ef0b27d4 | 559 | if (err) { |
0f8d8ea6 | 560 | printk(KERN_WARNING "%s: switch to bus width %d ddr %d " |
ef0b27d4 | 561 | "failed\n", mmc_hostname(card->host), |
0f8d8ea6 | 562 | 1 << bus_width, ddr); |
ef0b27d4 AH |
563 | err = 0; |
564 | } else { | |
0f8d8ea6 AH |
565 | mmc_card_set_ddr_mode(card); |
566 | mmc_set_bus_width_ddr(card->host, bus_width, ddr); | |
ef0b27d4 | 567 | } |
89a73cf5 PO |
568 | } |
569 | ||
6abaa0c9 PO |
570 | if (!oldcard) |
571 | host->card = card; | |
572 | ||
17b0429d | 573 | return 0; |
6abaa0c9 PO |
574 | |
575 | free_card: | |
576 | if (!oldcard) | |
577 | mmc_remove_card(card); | |
578 | err: | |
579 | ||
adf66a0d | 580 | return err; |
6abaa0c9 PO |
581 | } |
582 | ||
583 | /* | |
584 | * Host is being removed. Free up the current card. | |
585 | */ | |
586 | static void mmc_remove(struct mmc_host *host) | |
587 | { | |
588 | BUG_ON(!host); | |
589 | BUG_ON(!host->card); | |
590 | ||
591 | mmc_remove_card(host->card); | |
592 | host->card = NULL; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Card detection callback from host. | |
597 | */ | |
598 | static void mmc_detect(struct mmc_host *host) | |
599 | { | |
600 | int err; | |
601 | ||
602 | BUG_ON(!host); | |
603 | BUG_ON(!host->card); | |
604 | ||
605 | mmc_claim_host(host); | |
606 | ||
607 | /* | |
608 | * Just check if our card has been removed. | |
609 | */ | |
610 | err = mmc_send_status(host->card, NULL); | |
611 | ||
612 | mmc_release_host(host); | |
613 | ||
17b0429d | 614 | if (err) { |
4101c16a | 615 | mmc_remove(host); |
6abaa0c9 PO |
616 | |
617 | mmc_claim_host(host); | |
618 | mmc_detach_bus(host); | |
619 | mmc_release_host(host); | |
620 | } | |
621 | } | |
622 | ||
6abaa0c9 PO |
623 | /* |
624 | * Suspend callback from host. | |
625 | */ | |
95cdfb72 | 626 | static int mmc_suspend(struct mmc_host *host) |
6abaa0c9 PO |
627 | { |
628 | BUG_ON(!host); | |
629 | BUG_ON(!host->card); | |
7ea239d9 | 630 | |
6abaa0c9 | 631 | mmc_claim_host(host); |
af517150 DB |
632 | if (!mmc_host_is_spi(host)) |
633 | mmc_deselect_cards(host); | |
6abaa0c9 | 634 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
7ea239d9 | 635 | mmc_release_host(host); |
95cdfb72 NP |
636 | |
637 | return 0; | |
6abaa0c9 | 638 | } |
7ea239d9 | 639 | |
6abaa0c9 PO |
640 | /* |
641 | * Resume callback from host. | |
642 | * | |
643 | * This function tries to determine if the same card is still present | |
644 | * and, if so, restore all state to it. | |
645 | */ | |
95cdfb72 | 646 | static int mmc_resume(struct mmc_host *host) |
6abaa0c9 PO |
647 | { |
648 | int err; | |
649 | ||
650 | BUG_ON(!host); | |
651 | BUG_ON(!host->card); | |
652 | ||
653 | mmc_claim_host(host); | |
8c75deae | 654 | err = mmc_init_card(host, host->ocr, host->card); |
2986d0bf PO |
655 | mmc_release_host(host); |
656 | ||
95cdfb72 | 657 | return err; |
6abaa0c9 PO |
658 | } |
659 | ||
eae1aeee AH |
660 | static void mmc_power_restore(struct mmc_host *host) |
661 | { | |
662 | host->card->state &= ~MMC_STATE_HIGHSPEED; | |
663 | mmc_claim_host(host); | |
664 | mmc_init_card(host, host->ocr, host->card); | |
665 | mmc_release_host(host); | |
666 | } | |
667 | ||
b1ebe384 JL |
668 | static int mmc_sleep(struct mmc_host *host) |
669 | { | |
670 | struct mmc_card *card = host->card; | |
671 | int err = -ENOSYS; | |
672 | ||
673 | if (card && card->ext_csd.rev >= 3) { | |
674 | err = mmc_card_sleepawake(host, 1); | |
675 | if (err < 0) | |
676 | pr_debug("%s: Error %d while putting card into sleep", | |
677 | mmc_hostname(host), err); | |
678 | } | |
679 | ||
680 | return err; | |
681 | } | |
682 | ||
683 | static int mmc_awake(struct mmc_host *host) | |
684 | { | |
685 | struct mmc_card *card = host->card; | |
686 | int err = -ENOSYS; | |
687 | ||
688 | if (card && card->ext_csd.rev >= 3) { | |
689 | err = mmc_card_sleepawake(host, 0); | |
690 | if (err < 0) | |
691 | pr_debug("%s: Error %d while awaking sleeping card", | |
692 | mmc_hostname(host), err); | |
693 | } | |
694 | ||
695 | return err; | |
696 | } | |
697 | ||
6abaa0c9 | 698 | static const struct mmc_bus_ops mmc_ops = { |
b1ebe384 JL |
699 | .awake = mmc_awake, |
700 | .sleep = mmc_sleep, | |
9feae246 AH |
701 | .remove = mmc_remove, |
702 | .detect = mmc_detect, | |
703 | .suspend = NULL, | |
704 | .resume = NULL, | |
eae1aeee | 705 | .power_restore = mmc_power_restore, |
9feae246 AH |
706 | }; |
707 | ||
708 | static const struct mmc_bus_ops mmc_ops_unsafe = { | |
b1ebe384 JL |
709 | .awake = mmc_awake, |
710 | .sleep = mmc_sleep, | |
6abaa0c9 PO |
711 | .remove = mmc_remove, |
712 | .detect = mmc_detect, | |
713 | .suspend = mmc_suspend, | |
714 | .resume = mmc_resume, | |
eae1aeee | 715 | .power_restore = mmc_power_restore, |
6abaa0c9 PO |
716 | }; |
717 | ||
9feae246 AH |
718 | static void mmc_attach_bus_ops(struct mmc_host *host) |
719 | { | |
720 | const struct mmc_bus_ops *bus_ops; | |
721 | ||
71d7d3d1 | 722 | if (!mmc_card_is_removable(host)) |
9feae246 AH |
723 | bus_ops = &mmc_ops_unsafe; |
724 | else | |
725 | bus_ops = &mmc_ops; | |
726 | mmc_attach_bus(host, bus_ops); | |
727 | } | |
728 | ||
6abaa0c9 PO |
729 | /* |
730 | * Starting point for MMC card init. | |
731 | */ | |
732 | int mmc_attach_mmc(struct mmc_host *host, u32 ocr) | |
733 | { | |
734 | int err; | |
735 | ||
736 | BUG_ON(!host); | |
d84075c8 | 737 | WARN_ON(!host->claimed); |
6abaa0c9 | 738 | |
9feae246 | 739 | mmc_attach_bus_ops(host); |
6abaa0c9 | 740 | |
af517150 DB |
741 | /* |
742 | * We need to get OCR a different way for SPI. | |
743 | */ | |
744 | if (mmc_host_is_spi(host)) { | |
745 | err = mmc_spi_read_ocr(host, 1, &ocr); | |
746 | if (err) | |
747 | goto err; | |
748 | } | |
749 | ||
6abaa0c9 PO |
750 | /* |
751 | * Sanity check the voltages that the card claims to | |
752 | * support. | |
753 | */ | |
754 | if (ocr & 0x7F) { | |
755 | printk(KERN_WARNING "%s: card claims to support voltages " | |
756 | "below the defined range. These will be ignored.\n", | |
757 | mmc_hostname(host)); | |
758 | ocr &= ~0x7F; | |
759 | } | |
760 | ||
761 | host->ocr = mmc_select_voltage(host, ocr); | |
762 | ||
763 | /* | |
764 | * Can we support the voltage of the card? | |
765 | */ | |
109b5bed PO |
766 | if (!host->ocr) { |
767 | err = -EINVAL; | |
6abaa0c9 | 768 | goto err; |
109b5bed | 769 | } |
6abaa0c9 PO |
770 | |
771 | /* | |
772 | * Detect and init the card. | |
773 | */ | |
8c75deae | 774 | err = mmc_init_card(host, host->ocr, NULL); |
17b0429d | 775 | if (err) |
6abaa0c9 PO |
776 | goto err; |
777 | ||
778 | mmc_release_host(host); | |
779 | ||
4101c16a | 780 | err = mmc_add_card(host->card); |
7ea239d9 | 781 | if (err) |
2986d0bf | 782 | goto remove_card; |
7ea239d9 PO |
783 | |
784 | return 0; | |
785 | ||
2986d0bf | 786 | remove_card: |
6abaa0c9 | 787 | mmc_remove_card(host->card); |
7ea239d9 | 788 | host->card = NULL; |
2986d0bf | 789 | mmc_claim_host(host); |
7ea239d9 PO |
790 | err: |
791 | mmc_detach_bus(host); | |
792 | mmc_release_host(host); | |
793 | ||
109b5bed PO |
794 | printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", |
795 | mmc_hostname(host), err); | |
796 | ||
adf66a0d | 797 | return err; |
7ea239d9 | 798 | } |