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> | |
14 | ||
15 | #include <linux/mmc/host.h> | |
16 | #include <linux/mmc/card.h> | |
17 | #include <linux/mmc/mmc.h> | |
18 | ||
19 | #include "core.h" | |
4101c16a | 20 | #include "bus.h" |
7ea239d9 PO |
21 | #include "mmc_ops.h" |
22 | ||
23 | static const unsigned int tran_exp[] = { | |
24 | 10000, 100000, 1000000, 10000000, | |
25 | 0, 0, 0, 0 | |
26 | }; | |
27 | ||
28 | static const unsigned char tran_mant[] = { | |
29 | 0, 10, 12, 13, 15, 20, 25, 30, | |
30 | 35, 40, 45, 50, 55, 60, 70, 80, | |
31 | }; | |
32 | ||
33 | static const unsigned int tacc_exp[] = { | |
34 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
35 | }; | |
36 | ||
37 | static const unsigned int tacc_mant[] = { | |
38 | 0, 10, 12, 13, 15, 20, 25, 30, | |
39 | 35, 40, 45, 50, 55, 60, 70, 80, | |
40 | }; | |
41 | ||
42 | #define UNSTUFF_BITS(resp,start,size) \ | |
43 | ({ \ | |
44 | const int __size = size; \ | |
45 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
46 | const int __off = 3 - ((start) / 32); \ | |
47 | const int __shft = (start) & 31; \ | |
48 | u32 __res; \ | |
49 | \ | |
50 | __res = resp[__off] >> __shft; \ | |
51 | if (__size + __shft > 32) \ | |
52 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
53 | __res & __mask; \ | |
54 | }) | |
55 | ||
56 | /* | |
57 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
58 | */ | |
bd766312 | 59 | static int mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
60 | { |
61 | u32 *resp = card->raw_cid; | |
62 | ||
63 | /* | |
64 | * The selection of the format here is based upon published | |
65 | * specs from sandisk and from what people have reported. | |
66 | */ | |
67 | switch (card->csd.mmca_vsn) { | |
68 | case 0: /* MMC v1.0 - v1.2 */ | |
69 | case 1: /* MMC v1.4 */ | |
70 | card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); | |
71 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
72 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
73 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
74 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
75 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
76 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
77 | card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); | |
78 | card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); | |
79 | card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); | |
80 | card->cid.serial = UNSTUFF_BITS(resp, 16, 24); | |
81 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
82 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
83 | break; | |
84 | ||
85 | case 2: /* MMC v2.0 - v2.2 */ | |
86 | case 3: /* MMC v3.1 - v3.3 */ | |
87 | case 4: /* MMC v4 */ | |
88 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
89 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
90 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
91 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
92 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
93 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
94 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
95 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
96 | card->cid.serial = UNSTUFF_BITS(resp, 16, 32); | |
97 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
98 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
99 | break; | |
100 | ||
101 | default: | |
facba917 | 102 | printk(KERN_ERR "%s: card has unknown MMCA version %d\n", |
7ea239d9 | 103 | mmc_hostname(card->host), card->csd.mmca_vsn); |
bd766312 | 104 | return -EINVAL; |
7ea239d9 | 105 | } |
bd766312 PO |
106 | |
107 | return 0; | |
7ea239d9 PO |
108 | } |
109 | ||
110 | /* | |
111 | * Given a 128-bit response, decode to our card CSD structure. | |
112 | */ | |
bd766312 | 113 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
114 | { |
115 | struct mmc_csd *csd = &card->csd; | |
116 | unsigned int e, m, csd_struct; | |
117 | u32 *resp = card->raw_csd; | |
118 | ||
119 | /* | |
120 | * We only understand CSD structure v1.1 and v1.2. | |
121 | * v1.2 has extra information in bits 15, 11 and 10. | |
122 | */ | |
123 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
124 | if (csd_struct != 1 && csd_struct != 2) { | |
facba917 | 125 | printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 126 | mmc_hostname(card->host), csd_struct); |
bd766312 | 127 | return -EINVAL; |
7ea239d9 PO |
128 | } |
129 | ||
130 | csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); | |
131 | m = UNSTUFF_BITS(resp, 115, 4); | |
132 | e = UNSTUFF_BITS(resp, 112, 3); | |
133 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
134 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
135 | ||
136 | m = UNSTUFF_BITS(resp, 99, 4); | |
137 | e = UNSTUFF_BITS(resp, 96, 3); | |
138 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
139 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
140 | ||
141 | e = UNSTUFF_BITS(resp, 47, 3); | |
142 | m = UNSTUFF_BITS(resp, 62, 12); | |
143 | csd->capacity = (1 + m) << (e + 2); | |
144 | ||
145 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
146 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
147 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
148 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
149 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
150 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
151 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
bd766312 PO |
152 | |
153 | return 0; | |
7ea239d9 PO |
154 | } |
155 | ||
156 | /* | |
89a73cf5 | 157 | * Read and decode extended CSD. |
7ea239d9 | 158 | */ |
89a73cf5 | 159 | static int mmc_read_ext_csd(struct mmc_card *card) |
7ea239d9 PO |
160 | { |
161 | int err; | |
162 | u8 *ext_csd; | |
163 | ||
164 | BUG_ON(!card); | |
165 | ||
7ea239d9 | 166 | if (card->csd.mmca_vsn < CSD_SPEC_VER_4) |
17b0429d | 167 | return 0; |
7ea239d9 PO |
168 | |
169 | /* | |
170 | * As the ext_csd is so large and mostly unused, we don't store the | |
171 | * raw block in mmc_card. | |
172 | */ | |
173 | ext_csd = kmalloc(512, GFP_KERNEL); | |
174 | if (!ext_csd) { | |
175 | printk(KERN_ERR "%s: could not allocate a buffer to " | |
adf66a0d | 176 | "receive the ext_csd.\n", mmc_hostname(card->host)); |
17b0429d | 177 | return -ENOMEM; |
7ea239d9 PO |
178 | } |
179 | ||
180 | err = mmc_send_ext_csd(card, ext_csd); | |
17b0429d | 181 | if (err) { |
d08ebedd WM |
182 | /* If the host or the card can't do the switch, |
183 | * fail more gracefully. */ | |
184 | if ((err != -EINVAL) | |
185 | && (err != -ENOSYS) | |
186 | && (err != -EFAULT)) | |
adf66a0d PO |
187 | goto out; |
188 | ||
7ea239d9 PO |
189 | /* |
190 | * High capacity cards should have this "magic" size | |
191 | * stored in their CSD. | |
192 | */ | |
193 | if (card->csd.capacity == (4096 * 512)) { | |
194 | printk(KERN_ERR "%s: unable to read EXT_CSD " | |
195 | "on a possible high capacity card. " | |
196 | "Card will be ignored.\n", | |
197 | mmc_hostname(card->host)); | |
198 | } else { | |
199 | printk(KERN_WARNING "%s: unable to read " | |
200 | "EXT_CSD, performance might " | |
201 | "suffer.\n", | |
202 | mmc_hostname(card->host)); | |
17b0429d | 203 | err = 0; |
7ea239d9 | 204 | } |
adf66a0d | 205 | |
7ea239d9 PO |
206 | goto out; |
207 | } | |
208 | ||
b1ebe384 | 209 | card->ext_csd.rev = ext_csd[EXT_CSD_REV]; |
11723ab1 | 210 | if (card->ext_csd.rev > 5) { |
8fdd8521 PO |
211 | printk(KERN_ERR "%s: unrecognised EXT_CSD structure " |
212 | "version %d\n", mmc_hostname(card->host), | |
b1ebe384 | 213 | card->ext_csd.rev); |
00cedfa6 FM |
214 | err = -EINVAL; |
215 | goto out; | |
d7604d76 PO |
216 | } |
217 | ||
b1ebe384 | 218 | if (card->ext_csd.rev >= 2) { |
d7604d76 PO |
219 | card->ext_csd.sectors = |
220 | ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | | |
221 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | | |
222 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | | |
223 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; | |
224 | if (card->ext_csd.sectors) | |
225 | mmc_card_set_blockaddr(card); | |
226 | } | |
7ea239d9 PO |
227 | |
228 | switch (ext_csd[EXT_CSD_CARD_TYPE]) { | |
229 | case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: | |
230 | card->ext_csd.hs_max_dtr = 52000000; | |
231 | break; | |
232 | case EXT_CSD_CARD_TYPE_26: | |
233 | card->ext_csd.hs_max_dtr = 26000000; | |
234 | break; | |
235 | default: | |
236 | /* MMC v4 spec says this cannot happen */ | |
237 | printk(KERN_WARNING "%s: card is mmc v4 but doesn't " | |
238 | "support any high-speed modes.\n", | |
239 | mmc_hostname(card->host)); | |
240 | goto out; | |
241 | } | |
242 | ||
b1ebe384 JL |
243 | if (card->ext_csd.rev >= 3) { |
244 | u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; | |
245 | ||
246 | /* Sleep / awake timeout in 100ns units */ | |
247 | if (sa_shift > 0 && sa_shift <= 0x17) | |
248 | card->ext_csd.sa_timeout = | |
249 | 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; | |
250 | } | |
251 | ||
7ea239d9 PO |
252 | out: |
253 | kfree(ext_csd); | |
254 | ||
255 | return err; | |
256 | } | |
257 | ||
51ec92e2 PO |
258 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
259 | card->raw_cid[2], card->raw_cid[3]); | |
260 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
261 | card->raw_csd[2], card->raw_csd[3]); | |
262 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
263 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); | |
264 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
265 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
266 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
267 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
268 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
269 | ||
270 | static struct attribute *mmc_std_attrs[] = { | |
271 | &dev_attr_cid.attr, | |
272 | &dev_attr_csd.attr, | |
273 | &dev_attr_date.attr, | |
274 | &dev_attr_fwrev.attr, | |
275 | &dev_attr_hwrev.attr, | |
276 | &dev_attr_manfid.attr, | |
277 | &dev_attr_name.attr, | |
278 | &dev_attr_oemid.attr, | |
279 | &dev_attr_serial.attr, | |
280 | NULL, | |
281 | }; | |
282 | ||
283 | static struct attribute_group mmc_std_attr_group = { | |
284 | .attrs = mmc_std_attrs, | |
285 | }; | |
286 | ||
a4dbd674 | 287 | static const struct attribute_group *mmc_attr_groups[] = { |
51ec92e2 PO |
288 | &mmc_std_attr_group, |
289 | NULL, | |
290 | }; | |
291 | ||
292 | static struct device_type mmc_type = { | |
293 | .groups = mmc_attr_groups, | |
294 | }; | |
295 | ||
7ea239d9 | 296 | /* |
6abaa0c9 PO |
297 | * Handle the detection and initialisation of a card. |
298 | * | |
8769392b | 299 | * In the case of a resume, "oldcard" will contain the card |
6abaa0c9 | 300 | * we're trying to reinitialise. |
7ea239d9 | 301 | */ |
8c75deae | 302 | static int mmc_init_card(struct mmc_host *host, u32 ocr, |
6abaa0c9 | 303 | struct mmc_card *oldcard) |
7ea239d9 PO |
304 | { |
305 | struct mmc_card *card; | |
306 | int err; | |
307 | u32 cid[4]; | |
308 | unsigned int max_dtr; | |
309 | ||
310 | BUG_ON(!host); | |
d84075c8 | 311 | WARN_ON(!host->claimed); |
7ea239d9 | 312 | |
7ea239d9 PO |
313 | /* |
314 | * Since we're changing the OCR value, we seem to | |
315 | * need to tell some cards to go back to the idle | |
316 | * state. We wait 1ms to give cards time to | |
317 | * respond. | |
318 | */ | |
319 | mmc_go_idle(host); | |
320 | ||
321 | /* The extra bit indicates that we support high capacity */ | |
6abaa0c9 | 322 | err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); |
17b0429d | 323 | if (err) |
6abaa0c9 | 324 | goto err; |
7ea239d9 | 325 | |
af517150 DB |
326 | /* |
327 | * For SPI, enable CRC as appropriate. | |
328 | */ | |
329 | if (mmc_host_is_spi(host)) { | |
330 | err = mmc_spi_set_crc(host, use_spi_crc); | |
331 | if (err) | |
332 | goto err; | |
333 | } | |
334 | ||
7ea239d9 PO |
335 | /* |
336 | * Fetch CID from card. | |
337 | */ | |
af517150 DB |
338 | if (mmc_host_is_spi(host)) |
339 | err = mmc_send_cid(host, cid); | |
340 | else | |
341 | err = mmc_all_send_cid(host, cid); | |
17b0429d | 342 | if (err) |
7ea239d9 PO |
343 | goto err; |
344 | ||
6abaa0c9 | 345 | if (oldcard) { |
adf66a0d PO |
346 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
347 | err = -ENOENT; | |
6abaa0c9 | 348 | goto err; |
adf66a0d | 349 | } |
6abaa0c9 PO |
350 | |
351 | card = oldcard; | |
352 | } else { | |
353 | /* | |
354 | * Allocate card structure. | |
355 | */ | |
51ec92e2 | 356 | card = mmc_alloc_card(host, &mmc_type); |
adf66a0d PO |
357 | if (IS_ERR(card)) { |
358 | err = PTR_ERR(card); | |
6abaa0c9 | 359 | goto err; |
adf66a0d | 360 | } |
7ea239d9 | 361 | |
6abaa0c9 PO |
362 | card->type = MMC_TYPE_MMC; |
363 | card->rca = 1; | |
364 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
365 | } | |
7ea239d9 PO |
366 | |
367 | /* | |
af517150 | 368 | * For native busses: set card RCA and quit open drain mode. |
7ea239d9 | 369 | */ |
af517150 DB |
370 | if (!mmc_host_is_spi(host)) { |
371 | err = mmc_set_relative_addr(card); | |
372 | if (err) | |
373 | goto free_card; | |
7ea239d9 | 374 | |
af517150 DB |
375 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
376 | } | |
7ea239d9 | 377 | |
6abaa0c9 PO |
378 | if (!oldcard) { |
379 | /* | |
380 | * Fetch CSD from card. | |
381 | */ | |
382 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 383 | if (err) |
6abaa0c9 | 384 | goto free_card; |
7ea239d9 | 385 | |
bd766312 | 386 | err = mmc_decode_csd(card); |
adf66a0d | 387 | if (err) |
bd766312 PO |
388 | goto free_card; |
389 | err = mmc_decode_cid(card); | |
adf66a0d | 390 | if (err) |
bd766312 | 391 | goto free_card; |
6abaa0c9 | 392 | } |
7ea239d9 PO |
393 | |
394 | /* | |
89a73cf5 | 395 | * Select card, as all following commands rely on that. |
7ea239d9 | 396 | */ |
af517150 DB |
397 | if (!mmc_host_is_spi(host)) { |
398 | err = mmc_select_card(card); | |
399 | if (err) | |
400 | goto free_card; | |
401 | } | |
7ea239d9 | 402 | |
6abaa0c9 PO |
403 | if (!oldcard) { |
404 | /* | |
af517150 | 405 | * Fetch and process extended CSD. |
6abaa0c9 PO |
406 | */ |
407 | err = mmc_read_ext_csd(card); | |
17b0429d | 408 | if (err) |
6abaa0c9 PO |
409 | goto free_card; |
410 | } | |
7ea239d9 | 411 | |
89a73cf5 PO |
412 | /* |
413 | * Activate high speed (if supported) | |
414 | */ | |
415 | if ((card->ext_csd.hs_max_dtr != 0) && | |
416 | (host->caps & MMC_CAP_MMC_HIGHSPEED)) { | |
417 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
418 | EXT_CSD_HS_TIMING, 1); | |
ef0b27d4 | 419 | if (err && err != -EBADMSG) |
89a73cf5 PO |
420 | goto free_card; |
421 | ||
ef0b27d4 AH |
422 | if (err) { |
423 | printk(KERN_WARNING "%s: switch to highspeed failed\n", | |
424 | mmc_hostname(card->host)); | |
425 | err = 0; | |
426 | } else { | |
427 | mmc_card_set_highspeed(card); | |
428 | mmc_set_timing(card->host, MMC_TIMING_MMC_HS); | |
429 | } | |
89a73cf5 PO |
430 | } |
431 | ||
7ea239d9 PO |
432 | /* |
433 | * Compute bus speed. | |
434 | */ | |
435 | max_dtr = (unsigned int)-1; | |
436 | ||
437 | if (mmc_card_highspeed(card)) { | |
438 | if (max_dtr > card->ext_csd.hs_max_dtr) | |
439 | max_dtr = card->ext_csd.hs_max_dtr; | |
440 | } else if (max_dtr > card->csd.max_dtr) { | |
441 | max_dtr = card->csd.max_dtr; | |
442 | } | |
443 | ||
444 | mmc_set_clock(host, max_dtr); | |
445 | ||
89a73cf5 PO |
446 | /* |
447 | * Activate wide bus (if supported). | |
448 | */ | |
449 | if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && | |
b30f8af3 JL |
450 | (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { |
451 | unsigned ext_csd_bit, bus_width; | |
452 | ||
453 | if (host->caps & MMC_CAP_8_BIT_DATA) { | |
454 | ext_csd_bit = EXT_CSD_BUS_WIDTH_8; | |
455 | bus_width = MMC_BUS_WIDTH_8; | |
456 | } else { | |
457 | ext_csd_bit = EXT_CSD_BUS_WIDTH_4; | |
458 | bus_width = MMC_BUS_WIDTH_4; | |
459 | } | |
460 | ||
89a73cf5 | 461 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
b30f8af3 JL |
462 | EXT_CSD_BUS_WIDTH, ext_csd_bit); |
463 | ||
ef0b27d4 | 464 | if (err && err != -EBADMSG) |
89a73cf5 PO |
465 | goto free_card; |
466 | ||
ef0b27d4 AH |
467 | if (err) { |
468 | printk(KERN_WARNING "%s: switch to bus width %d " | |
469 | "failed\n", mmc_hostname(card->host), | |
470 | 1 << bus_width); | |
471 | err = 0; | |
472 | } else { | |
473 | mmc_set_bus_width(card->host, bus_width); | |
474 | } | |
89a73cf5 PO |
475 | } |
476 | ||
6abaa0c9 PO |
477 | if (!oldcard) |
478 | host->card = card; | |
479 | ||
17b0429d | 480 | return 0; |
6abaa0c9 PO |
481 | |
482 | free_card: | |
483 | if (!oldcard) | |
484 | mmc_remove_card(card); | |
485 | err: | |
486 | ||
adf66a0d | 487 | return err; |
6abaa0c9 PO |
488 | } |
489 | ||
490 | /* | |
491 | * Host is being removed. Free up the current card. | |
492 | */ | |
493 | static void mmc_remove(struct mmc_host *host) | |
494 | { | |
495 | BUG_ON(!host); | |
496 | BUG_ON(!host->card); | |
497 | ||
498 | mmc_remove_card(host->card); | |
499 | host->card = NULL; | |
500 | } | |
501 | ||
502 | /* | |
503 | * Card detection callback from host. | |
504 | */ | |
505 | static void mmc_detect(struct mmc_host *host) | |
506 | { | |
507 | int err; | |
508 | ||
509 | BUG_ON(!host); | |
510 | BUG_ON(!host->card); | |
511 | ||
512 | mmc_claim_host(host); | |
513 | ||
514 | /* | |
515 | * Just check if our card has been removed. | |
516 | */ | |
517 | err = mmc_send_status(host->card, NULL); | |
518 | ||
519 | mmc_release_host(host); | |
520 | ||
17b0429d | 521 | if (err) { |
4101c16a | 522 | mmc_remove(host); |
6abaa0c9 PO |
523 | |
524 | mmc_claim_host(host); | |
525 | mmc_detach_bus(host); | |
526 | mmc_release_host(host); | |
527 | } | |
528 | } | |
529 | ||
6abaa0c9 PO |
530 | /* |
531 | * Suspend callback from host. | |
532 | */ | |
95cdfb72 | 533 | static int mmc_suspend(struct mmc_host *host) |
6abaa0c9 PO |
534 | { |
535 | BUG_ON(!host); | |
536 | BUG_ON(!host->card); | |
7ea239d9 | 537 | |
6abaa0c9 | 538 | mmc_claim_host(host); |
af517150 DB |
539 | if (!mmc_host_is_spi(host)) |
540 | mmc_deselect_cards(host); | |
6abaa0c9 | 541 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
7ea239d9 | 542 | mmc_release_host(host); |
95cdfb72 NP |
543 | |
544 | return 0; | |
6abaa0c9 | 545 | } |
7ea239d9 | 546 | |
6abaa0c9 PO |
547 | /* |
548 | * Resume callback from host. | |
549 | * | |
550 | * This function tries to determine if the same card is still present | |
551 | * and, if so, restore all state to it. | |
552 | */ | |
95cdfb72 | 553 | static int mmc_resume(struct mmc_host *host) |
6abaa0c9 PO |
554 | { |
555 | int err; | |
556 | ||
557 | BUG_ON(!host); | |
558 | BUG_ON(!host->card); | |
559 | ||
560 | mmc_claim_host(host); | |
8c75deae | 561 | err = mmc_init_card(host, host->ocr, host->card); |
2986d0bf PO |
562 | mmc_release_host(host); |
563 | ||
95cdfb72 | 564 | return err; |
6abaa0c9 PO |
565 | } |
566 | ||
eae1aeee AH |
567 | static void mmc_power_restore(struct mmc_host *host) |
568 | { | |
569 | host->card->state &= ~MMC_STATE_HIGHSPEED; | |
570 | mmc_claim_host(host); | |
571 | mmc_init_card(host, host->ocr, host->card); | |
572 | mmc_release_host(host); | |
573 | } | |
574 | ||
b1ebe384 JL |
575 | static int mmc_sleep(struct mmc_host *host) |
576 | { | |
577 | struct mmc_card *card = host->card; | |
578 | int err = -ENOSYS; | |
579 | ||
580 | if (card && card->ext_csd.rev >= 3) { | |
581 | err = mmc_card_sleepawake(host, 1); | |
582 | if (err < 0) | |
583 | pr_debug("%s: Error %d while putting card into sleep", | |
584 | mmc_hostname(host), err); | |
585 | } | |
586 | ||
587 | return err; | |
588 | } | |
589 | ||
590 | static int mmc_awake(struct mmc_host *host) | |
591 | { | |
592 | struct mmc_card *card = host->card; | |
593 | int err = -ENOSYS; | |
594 | ||
595 | if (card && card->ext_csd.rev >= 3) { | |
596 | err = mmc_card_sleepawake(host, 0); | |
597 | if (err < 0) | |
598 | pr_debug("%s: Error %d while awaking sleeping card", | |
599 | mmc_hostname(host), err); | |
600 | } | |
601 | ||
602 | return err; | |
603 | } | |
604 | ||
6abaa0c9 | 605 | static const struct mmc_bus_ops mmc_ops = { |
b1ebe384 JL |
606 | .awake = mmc_awake, |
607 | .sleep = mmc_sleep, | |
9feae246 AH |
608 | .remove = mmc_remove, |
609 | .detect = mmc_detect, | |
610 | .suspend = NULL, | |
611 | .resume = NULL, | |
eae1aeee | 612 | .power_restore = mmc_power_restore, |
9feae246 AH |
613 | }; |
614 | ||
615 | static const struct mmc_bus_ops mmc_ops_unsafe = { | |
b1ebe384 JL |
616 | .awake = mmc_awake, |
617 | .sleep = mmc_sleep, | |
6abaa0c9 PO |
618 | .remove = mmc_remove, |
619 | .detect = mmc_detect, | |
620 | .suspend = mmc_suspend, | |
621 | .resume = mmc_resume, | |
eae1aeee | 622 | .power_restore = mmc_power_restore, |
6abaa0c9 PO |
623 | }; |
624 | ||
9feae246 AH |
625 | static void mmc_attach_bus_ops(struct mmc_host *host) |
626 | { | |
627 | const struct mmc_bus_ops *bus_ops; | |
628 | ||
bd68e083 | 629 | if (host->caps & MMC_CAP_NONREMOVABLE || !mmc_assume_removable) |
9feae246 AH |
630 | bus_ops = &mmc_ops_unsafe; |
631 | else | |
632 | bus_ops = &mmc_ops; | |
633 | mmc_attach_bus(host, bus_ops); | |
634 | } | |
635 | ||
6abaa0c9 PO |
636 | /* |
637 | * Starting point for MMC card init. | |
638 | */ | |
639 | int mmc_attach_mmc(struct mmc_host *host, u32 ocr) | |
640 | { | |
641 | int err; | |
642 | ||
643 | BUG_ON(!host); | |
d84075c8 | 644 | WARN_ON(!host->claimed); |
6abaa0c9 | 645 | |
9feae246 | 646 | mmc_attach_bus_ops(host); |
6abaa0c9 | 647 | |
af517150 DB |
648 | /* |
649 | * We need to get OCR a different way for SPI. | |
650 | */ | |
651 | if (mmc_host_is_spi(host)) { | |
652 | err = mmc_spi_read_ocr(host, 1, &ocr); | |
653 | if (err) | |
654 | goto err; | |
655 | } | |
656 | ||
6abaa0c9 PO |
657 | /* |
658 | * Sanity check the voltages that the card claims to | |
659 | * support. | |
660 | */ | |
661 | if (ocr & 0x7F) { | |
662 | printk(KERN_WARNING "%s: card claims to support voltages " | |
663 | "below the defined range. These will be ignored.\n", | |
664 | mmc_hostname(host)); | |
665 | ocr &= ~0x7F; | |
666 | } | |
667 | ||
668 | host->ocr = mmc_select_voltage(host, ocr); | |
669 | ||
670 | /* | |
671 | * Can we support the voltage of the card? | |
672 | */ | |
109b5bed PO |
673 | if (!host->ocr) { |
674 | err = -EINVAL; | |
6abaa0c9 | 675 | goto err; |
109b5bed | 676 | } |
6abaa0c9 PO |
677 | |
678 | /* | |
679 | * Detect and init the card. | |
680 | */ | |
8c75deae | 681 | err = mmc_init_card(host, host->ocr, NULL); |
17b0429d | 682 | if (err) |
6abaa0c9 PO |
683 | goto err; |
684 | ||
685 | mmc_release_host(host); | |
686 | ||
4101c16a | 687 | err = mmc_add_card(host->card); |
7ea239d9 | 688 | if (err) |
2986d0bf | 689 | goto remove_card; |
7ea239d9 PO |
690 | |
691 | return 0; | |
692 | ||
2986d0bf | 693 | remove_card: |
6abaa0c9 | 694 | mmc_remove_card(host->card); |
7ea239d9 | 695 | host->card = NULL; |
2986d0bf | 696 | mmc_claim_host(host); |
7ea239d9 PO |
697 | err: |
698 | mmc_detach_bus(host); | |
699 | mmc_release_host(host); | |
700 | ||
109b5bed PO |
701 | printk(KERN_ERR "%s: error %d whilst initialising MMC card\n", |
702 | mmc_hostname(host), err); | |
703 | ||
adf66a0d | 704 | return err; |
7ea239d9 | 705 | } |