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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> | |
14 | ||
15 | #include <linux/mmc/host.h> | |
16 | #include <linux/mmc/card.h> | |
17 | #include <linux/mmc/mmc.h> | |
18 | ||
19 | #include "core.h" | |
20 | #include "sysfs.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 | ||
111 | /* | |
112 | * Given a 128-bit response, decode to our card CSD structure. | |
113 | */ | |
bd766312 | 114 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
115 | { |
116 | struct mmc_csd *csd = &card->csd; | |
117 | unsigned int e, m, csd_struct; | |
118 | u32 *resp = card->raw_csd; | |
119 | ||
120 | /* | |
121 | * We only understand CSD structure v1.1 and v1.2. | |
122 | * v1.2 has extra information in bits 15, 11 and 10. | |
123 | */ | |
124 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
125 | if (csd_struct != 1 && csd_struct != 2) { | |
facba917 | 126 | printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 127 | mmc_hostname(card->host), csd_struct); |
bd766312 | 128 | return -EINVAL; |
7ea239d9 PO |
129 | } |
130 | ||
131 | csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); | |
132 | m = UNSTUFF_BITS(resp, 115, 4); | |
133 | e = UNSTUFF_BITS(resp, 112, 3); | |
134 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
135 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
136 | ||
137 | m = UNSTUFF_BITS(resp, 99, 4); | |
138 | e = UNSTUFF_BITS(resp, 96, 3); | |
139 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
140 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
141 | ||
142 | e = UNSTUFF_BITS(resp, 47, 3); | |
143 | m = UNSTUFF_BITS(resp, 62, 12); | |
144 | csd->capacity = (1 + m) << (e + 2); | |
145 | ||
146 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
147 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
148 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
149 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
150 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
151 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
152 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
bd766312 PO |
153 | |
154 | return 0; | |
7ea239d9 PO |
155 | } |
156 | ||
157 | /* | |
89a73cf5 | 158 | * Read and decode extended CSD. |
7ea239d9 | 159 | */ |
89a73cf5 | 160 | static int mmc_read_ext_csd(struct mmc_card *card) |
7ea239d9 PO |
161 | { |
162 | int err; | |
163 | u8 *ext_csd; | |
d7604d76 | 164 | unsigned int ext_csd_struct; |
7ea239d9 PO |
165 | |
166 | BUG_ON(!card); | |
167 | ||
17b0429d | 168 | err = -EIO; |
7ea239d9 PO |
169 | |
170 | if (card->csd.mmca_vsn < CSD_SPEC_VER_4) | |
17b0429d | 171 | return 0; |
7ea239d9 PO |
172 | |
173 | /* | |
174 | * As the ext_csd is so large and mostly unused, we don't store the | |
175 | * raw block in mmc_card. | |
176 | */ | |
177 | ext_csd = kmalloc(512, GFP_KERNEL); | |
178 | if (!ext_csd) { | |
179 | printk(KERN_ERR "%s: could not allocate a buffer to " | |
adf66a0d | 180 | "receive the ext_csd.\n", mmc_hostname(card->host)); |
17b0429d | 181 | return -ENOMEM; |
7ea239d9 PO |
182 | } |
183 | ||
184 | err = mmc_send_ext_csd(card, ext_csd); | |
17b0429d | 185 | if (err) { |
adf66a0d PO |
186 | /* |
187 | * We all hosts that cannot perform the command | |
188 | * to fail more gracefully | |
189 | */ | |
190 | if (err != -EINVAL) | |
191 | goto out; | |
192 | ||
7ea239d9 PO |
193 | /* |
194 | * High capacity cards should have this "magic" size | |
195 | * stored in their CSD. | |
196 | */ | |
197 | if (card->csd.capacity == (4096 * 512)) { | |
198 | printk(KERN_ERR "%s: unable to read EXT_CSD " | |
199 | "on a possible high capacity card. " | |
200 | "Card will be ignored.\n", | |
201 | mmc_hostname(card->host)); | |
202 | } else { | |
203 | printk(KERN_WARNING "%s: unable to read " | |
204 | "EXT_CSD, performance might " | |
205 | "suffer.\n", | |
206 | mmc_hostname(card->host)); | |
17b0429d | 207 | err = 0; |
7ea239d9 | 208 | } |
adf66a0d | 209 | |
7ea239d9 PO |
210 | goto out; |
211 | } | |
212 | ||
d7604d76 PO |
213 | ext_csd_struct = ext_csd[EXT_CSD_REV]; |
214 | if (ext_csd_struct > 2) { | |
8fdd8521 PO |
215 | printk(KERN_ERR "%s: unrecognised EXT_CSD structure " |
216 | "version %d\n", mmc_hostname(card->host), | |
217 | ext_csd_struct); | |
d7604d76 PO |
218 | return -EINVAL; |
219 | } | |
220 | ||
221 | if (ext_csd_struct >= 2) { | |
222 | card->ext_csd.sectors = | |
223 | ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | | |
224 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | | |
225 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | | |
226 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; | |
227 | if (card->ext_csd.sectors) | |
228 | mmc_card_set_blockaddr(card); | |
229 | } | |
7ea239d9 PO |
230 | |
231 | switch (ext_csd[EXT_CSD_CARD_TYPE]) { | |
232 | case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: | |
233 | card->ext_csd.hs_max_dtr = 52000000; | |
234 | break; | |
235 | case EXT_CSD_CARD_TYPE_26: | |
236 | card->ext_csd.hs_max_dtr = 26000000; | |
237 | break; | |
238 | default: | |
239 | /* MMC v4 spec says this cannot happen */ | |
240 | printk(KERN_WARNING "%s: card is mmc v4 but doesn't " | |
241 | "support any high-speed modes.\n", | |
242 | mmc_hostname(card->host)); | |
243 | goto out; | |
244 | } | |
245 | ||
7ea239d9 PO |
246 | out: |
247 | kfree(ext_csd); | |
248 | ||
249 | return err; | |
250 | } | |
251 | ||
252 | /* | |
6abaa0c9 PO |
253 | * Handle the detection and initialisation of a card. |
254 | * | |
255 | * In the case of a resume, "curcard" will contain the card | |
256 | * we're trying to reinitialise. | |
7ea239d9 | 257 | */ |
8c75deae | 258 | static int mmc_init_card(struct mmc_host *host, u32 ocr, |
6abaa0c9 | 259 | struct mmc_card *oldcard) |
7ea239d9 PO |
260 | { |
261 | struct mmc_card *card; | |
262 | int err; | |
263 | u32 cid[4]; | |
264 | unsigned int max_dtr; | |
265 | ||
266 | BUG_ON(!host); | |
267 | BUG_ON(!host->claimed); | |
268 | ||
7ea239d9 PO |
269 | /* |
270 | * Since we're changing the OCR value, we seem to | |
271 | * need to tell some cards to go back to the idle | |
272 | * state. We wait 1ms to give cards time to | |
273 | * respond. | |
274 | */ | |
275 | mmc_go_idle(host); | |
276 | ||
277 | /* The extra bit indicates that we support high capacity */ | |
6abaa0c9 | 278 | err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); |
17b0429d | 279 | if (err) |
6abaa0c9 | 280 | goto err; |
7ea239d9 PO |
281 | |
282 | /* | |
283 | * Fetch CID from card. | |
284 | */ | |
285 | err = mmc_all_send_cid(host, cid); | |
17b0429d | 286 | if (err) |
7ea239d9 PO |
287 | goto err; |
288 | ||
6abaa0c9 | 289 | if (oldcard) { |
adf66a0d PO |
290 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
291 | err = -ENOENT; | |
6abaa0c9 | 292 | goto err; |
adf66a0d | 293 | } |
6abaa0c9 PO |
294 | |
295 | card = oldcard; | |
296 | } else { | |
297 | /* | |
298 | * Allocate card structure. | |
299 | */ | |
300 | card = mmc_alloc_card(host); | |
adf66a0d PO |
301 | if (IS_ERR(card)) { |
302 | err = PTR_ERR(card); | |
6abaa0c9 | 303 | goto err; |
adf66a0d | 304 | } |
7ea239d9 | 305 | |
6abaa0c9 PO |
306 | card->type = MMC_TYPE_MMC; |
307 | card->rca = 1; | |
308 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
309 | } | |
7ea239d9 PO |
310 | |
311 | /* | |
312 | * Set card RCA. | |
313 | */ | |
314 | err = mmc_set_relative_addr(card); | |
17b0429d | 315 | if (err) |
7ea239d9 PO |
316 | goto free_card; |
317 | ||
318 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); | |
319 | ||
6abaa0c9 PO |
320 | if (!oldcard) { |
321 | /* | |
322 | * Fetch CSD from card. | |
323 | */ | |
324 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 325 | if (err) |
6abaa0c9 | 326 | goto free_card; |
7ea239d9 | 327 | |
bd766312 | 328 | err = mmc_decode_csd(card); |
adf66a0d | 329 | if (err) |
bd766312 PO |
330 | goto free_card; |
331 | err = mmc_decode_cid(card); | |
adf66a0d | 332 | if (err) |
bd766312 | 333 | goto free_card; |
6abaa0c9 | 334 | } |
7ea239d9 PO |
335 | |
336 | /* | |
89a73cf5 | 337 | * Select card, as all following commands rely on that. |
7ea239d9 PO |
338 | */ |
339 | err = mmc_select_card(card); | |
17b0429d | 340 | if (err) |
7ea239d9 PO |
341 | goto free_card; |
342 | ||
6abaa0c9 PO |
343 | if (!oldcard) { |
344 | /* | |
345 | * Fetch and process extened CSD. | |
346 | */ | |
347 | err = mmc_read_ext_csd(card); | |
17b0429d | 348 | if (err) |
6abaa0c9 PO |
349 | goto free_card; |
350 | } | |
7ea239d9 | 351 | |
89a73cf5 PO |
352 | /* |
353 | * Activate high speed (if supported) | |
354 | */ | |
355 | if ((card->ext_csd.hs_max_dtr != 0) && | |
356 | (host->caps & MMC_CAP_MMC_HIGHSPEED)) { | |
357 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
358 | EXT_CSD_HS_TIMING, 1); | |
17b0429d | 359 | if (err) |
89a73cf5 PO |
360 | goto free_card; |
361 | ||
362 | mmc_card_set_highspeed(card); | |
363 | ||
364 | mmc_set_timing(card->host, MMC_TIMING_MMC_HS); | |
365 | } | |
366 | ||
7ea239d9 PO |
367 | /* |
368 | * Compute bus speed. | |
369 | */ | |
370 | max_dtr = (unsigned int)-1; | |
371 | ||
372 | if (mmc_card_highspeed(card)) { | |
373 | if (max_dtr > card->ext_csd.hs_max_dtr) | |
374 | max_dtr = card->ext_csd.hs_max_dtr; | |
375 | } else if (max_dtr > card->csd.max_dtr) { | |
376 | max_dtr = card->csd.max_dtr; | |
377 | } | |
378 | ||
379 | mmc_set_clock(host, max_dtr); | |
380 | ||
89a73cf5 PO |
381 | /* |
382 | * Activate wide bus (if supported). | |
383 | */ | |
384 | if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && | |
385 | (host->caps & MMC_CAP_4_BIT_DATA)) { | |
386 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
387 | EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); | |
17b0429d | 388 | if (err) |
89a73cf5 PO |
389 | goto free_card; |
390 | ||
391 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
392 | } | |
393 | ||
6abaa0c9 PO |
394 | if (!oldcard) |
395 | host->card = card; | |
396 | ||
17b0429d | 397 | return 0; |
6abaa0c9 PO |
398 | |
399 | free_card: | |
400 | if (!oldcard) | |
401 | mmc_remove_card(card); | |
402 | err: | |
403 | ||
adf66a0d | 404 | return err; |
6abaa0c9 PO |
405 | } |
406 | ||
407 | /* | |
408 | * Host is being removed. Free up the current card. | |
409 | */ | |
410 | static void mmc_remove(struct mmc_host *host) | |
411 | { | |
412 | BUG_ON(!host); | |
413 | BUG_ON(!host->card); | |
414 | ||
415 | mmc_remove_card(host->card); | |
416 | host->card = NULL; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Card detection callback from host. | |
421 | */ | |
422 | static void mmc_detect(struct mmc_host *host) | |
423 | { | |
424 | int err; | |
425 | ||
426 | BUG_ON(!host); | |
427 | BUG_ON(!host->card); | |
428 | ||
429 | mmc_claim_host(host); | |
430 | ||
431 | /* | |
432 | * Just check if our card has been removed. | |
433 | */ | |
434 | err = mmc_send_status(host->card, NULL); | |
435 | ||
436 | mmc_release_host(host); | |
437 | ||
17b0429d | 438 | if (err) { |
4101c16a | 439 | mmc_remove(host); |
6abaa0c9 PO |
440 | |
441 | mmc_claim_host(host); | |
442 | mmc_detach_bus(host); | |
443 | mmc_release_host(host); | |
444 | } | |
445 | } | |
446 | ||
4101c16a PO |
447 | MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
448 | card->raw_cid[2], card->raw_cid[3]); | |
449 | MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
450 | card->raw_csd[2], card->raw_csd[3]); | |
451 | MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
452 | MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); | |
453 | MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); | |
454 | MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); | |
455 | MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); | |
456 | MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); | |
457 | MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); | |
458 | ||
459 | static struct device_attribute mmc_dev_attrs[] = { | |
460 | MMC_ATTR_RO(cid), | |
461 | MMC_ATTR_RO(csd), | |
462 | MMC_ATTR_RO(date), | |
463 | MMC_ATTR_RO(fwrev), | |
464 | MMC_ATTR_RO(hwrev), | |
465 | MMC_ATTR_RO(manfid), | |
466 | MMC_ATTR_RO(name), | |
467 | MMC_ATTR_RO(oemid), | |
468 | MMC_ATTR_RO(serial), | |
469 | __ATTR_NULL, | |
470 | }; | |
471 | ||
472 | /* | |
473 | * Adds sysfs entries as relevant. | |
474 | */ | |
475 | static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) | |
476 | { | |
477 | int ret; | |
478 | ||
479 | ret = mmc_add_attrs(card, mmc_dev_attrs); | |
480 | if (ret < 0) | |
481 | return ret; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | /* | |
487 | * Removes the sysfs entries added by mmc_sysfs_add(). | |
488 | */ | |
489 | static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) | |
490 | { | |
491 | mmc_remove_attrs(card, mmc_dev_attrs); | |
492 | } | |
493 | ||
6abaa0c9 PO |
494 | #ifdef CONFIG_MMC_UNSAFE_RESUME |
495 | ||
496 | /* | |
497 | * Suspend callback from host. | |
498 | */ | |
499 | static void mmc_suspend(struct mmc_host *host) | |
500 | { | |
501 | BUG_ON(!host); | |
502 | BUG_ON(!host->card); | |
7ea239d9 | 503 | |
6abaa0c9 PO |
504 | mmc_claim_host(host); |
505 | mmc_deselect_cards(host); | |
506 | host->card->state &= ~MMC_STATE_HIGHSPEED; | |
7ea239d9 | 507 | mmc_release_host(host); |
6abaa0c9 | 508 | } |
7ea239d9 | 509 | |
6abaa0c9 PO |
510 | /* |
511 | * Resume callback from host. | |
512 | * | |
513 | * This function tries to determine if the same card is still present | |
514 | * and, if so, restore all state to it. | |
515 | */ | |
516 | static void mmc_resume(struct mmc_host *host) | |
517 | { | |
518 | int err; | |
519 | ||
520 | BUG_ON(!host); | |
521 | BUG_ON(!host->card); | |
522 | ||
523 | mmc_claim_host(host); | |
8c75deae | 524 | err = mmc_init_card(host, host->ocr, host->card); |
2986d0bf PO |
525 | mmc_release_host(host); |
526 | ||
17b0429d | 527 | if (err) { |
4101c16a | 528 | mmc_remove(host); |
2986d0bf PO |
529 | |
530 | mmc_claim_host(host); | |
6abaa0c9 | 531 | mmc_detach_bus(host); |
2986d0bf | 532 | mmc_release_host(host); |
6abaa0c9 PO |
533 | } |
534 | ||
6abaa0c9 PO |
535 | } |
536 | ||
537 | #else | |
538 | ||
539 | #define mmc_suspend NULL | |
540 | #define mmc_resume NULL | |
541 | ||
542 | #endif | |
543 | ||
544 | static const struct mmc_bus_ops mmc_ops = { | |
545 | .remove = mmc_remove, | |
546 | .detect = mmc_detect, | |
4101c16a PO |
547 | .sysfs_add = mmc_sysfs_add, |
548 | .sysfs_remove = mmc_sysfs_remove, | |
6abaa0c9 PO |
549 | .suspend = mmc_suspend, |
550 | .resume = mmc_resume, | |
551 | }; | |
552 | ||
553 | /* | |
554 | * Starting point for MMC card init. | |
555 | */ | |
556 | int mmc_attach_mmc(struct mmc_host *host, u32 ocr) | |
557 | { | |
558 | int err; | |
559 | ||
560 | BUG_ON(!host); | |
561 | BUG_ON(!host->claimed); | |
562 | ||
563 | mmc_attach_bus(host, &mmc_ops); | |
564 | ||
565 | /* | |
566 | * Sanity check the voltages that the card claims to | |
567 | * support. | |
568 | */ | |
569 | if (ocr & 0x7F) { | |
570 | printk(KERN_WARNING "%s: card claims to support voltages " | |
571 | "below the defined range. These will be ignored.\n", | |
572 | mmc_hostname(host)); | |
573 | ocr &= ~0x7F; | |
574 | } | |
575 | ||
576 | host->ocr = mmc_select_voltage(host, ocr); | |
577 | ||
578 | /* | |
579 | * Can we support the voltage of the card? | |
580 | */ | |
109b5bed PO |
581 | if (!host->ocr) { |
582 | err = -EINVAL; | |
6abaa0c9 | 583 | goto err; |
109b5bed | 584 | } |
6abaa0c9 PO |
585 | |
586 | /* | |
587 | * Detect and init the card. | |
588 | */ | |
8c75deae | 589 | err = mmc_init_card(host, host->ocr, NULL); |
17b0429d | 590 | if (err) |
6abaa0c9 PO |
591 | goto err; |
592 | ||
593 | mmc_release_host(host); | |
594 | ||
4101c16a | 595 | err = mmc_add_card(host->card); |
7ea239d9 | 596 | if (err) |
2986d0bf | 597 | goto remove_card; |
7ea239d9 PO |
598 | |
599 | return 0; | |
600 | ||
2986d0bf | 601 | remove_card: |
6abaa0c9 | 602 | mmc_remove_card(host->card); |
7ea239d9 | 603 | host->card = NULL; |
2986d0bf | 604 | mmc_claim_host(host); |
7ea239d9 PO |
605 | err: |
606 | mmc_detach_bus(host); | |
607 | mmc_release_host(host); | |
608 | ||
109b5bed PO |
609 | printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", |
610 | mmc_hostname(host), err); | |
611 | ||
adf66a0d | 612 | return err; |
7ea239d9 PO |
613 | } |
614 |