Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
aaac1b47 | 2 | * linux/drivers/mmc/core/core.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5b4fd9ae | 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
b855885e | 6 | * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. |
bce40a36 | 7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/err.h> | |
b57c43ad PO |
21 | #include <asm/scatterlist.h> |
22 | #include <linux/scatterlist.h> | |
1da177e4 LT |
23 | |
24 | #include <linux/mmc/card.h> | |
25 | #include <linux/mmc/host.h> | |
26 | #include <linux/mmc/protocol.h> | |
27 | ||
aaac1b47 | 28 | #include "core.h" |
1da177e4 | 29 | |
1da177e4 LT |
30 | #define CMD_RETRIES 3 |
31 | ||
32 | /* | |
33 | * OCR Bit positions to 10s of Vdd mV. | |
34 | */ | |
35 | static const unsigned short mmc_ocr_bit_to_vdd[] = { | |
36 | 150, 155, 160, 165, 170, 180, 190, 200, | |
37 | 210, 220, 230, 240, 250, 260, 270, 280, | |
38 | 290, 300, 310, 320, 330, 340, 350, 360 | |
39 | }; | |
40 | ||
41 | static const unsigned int tran_exp[] = { | |
42 | 10000, 100000, 1000000, 10000000, | |
43 | 0, 0, 0, 0 | |
44 | }; | |
45 | ||
46 | static const unsigned char tran_mant[] = { | |
47 | 0, 10, 12, 13, 15, 20, 25, 30, | |
48 | 35, 40, 45, 50, 55, 60, 70, 80, | |
49 | }; | |
50 | ||
51 | static const unsigned int tacc_exp[] = { | |
52 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
53 | }; | |
54 | ||
55 | static const unsigned int tacc_mant[] = { | |
56 | 0, 10, 12, 13, 15, 20, 25, 30, | |
57 | 35, 40, 45, 50, 55, 60, 70, 80, | |
58 | }; | |
59 | ||
60 | ||
61 | /** | |
fe10c6ab RK |
62 | * mmc_request_done - finish processing an MMC request |
63 | * @host: MMC host which completed request | |
64 | * @mrq: MMC request which request | |
1da177e4 LT |
65 | * |
66 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 67 | * their processing of a request. |
1da177e4 LT |
68 | */ |
69 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
70 | { | |
71 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
72 | int err = cmd->error; |
73 | ||
74 | pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n", | |
75 | mmc_hostname(host), cmd->opcode, err, | |
76 | mrq->data ? mrq->data->error : 0, | |
77 | mrq->stop ? mrq->stop->error : 0, | |
78 | cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); | |
1da177e4 LT |
79 | |
80 | if (err && cmd->retries) { | |
81 | cmd->retries--; | |
82 | cmd->error = 0; | |
83 | host->ops->request(host, mrq); | |
84 | } else if (mrq->done) { | |
85 | mrq->done(mrq); | |
86 | } | |
87 | } | |
88 | ||
89 | EXPORT_SYMBOL(mmc_request_done); | |
90 | ||
91 | /** | |
92 | * mmc_start_request - start a command on a host | |
93 | * @host: MMC host to start command on | |
94 | * @mrq: MMC request to start | |
95 | * | |
96 | * Queue a command on the specified host. We expect the | |
97 | * caller to be holding the host lock with interrupts disabled. | |
98 | */ | |
99 | void | |
100 | mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) | |
101 | { | |
976d9276 PO |
102 | #ifdef CONFIG_MMC_DEBUG |
103 | unsigned int i, sz; | |
104 | #endif | |
105 | ||
920e70c5 RK |
106 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
107 | mmc_hostname(host), mrq->cmd->opcode, | |
108 | mrq->cmd->arg, mrq->cmd->flags); | |
1da177e4 | 109 | |
f22ee4ed | 110 | WARN_ON(!host->claimed); |
1da177e4 LT |
111 | |
112 | mrq->cmd->error = 0; | |
113 | mrq->cmd->mrq = mrq; | |
114 | if (mrq->data) { | |
fe4a3c7a | 115 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
55db890a PO |
116 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
117 | BUG_ON(mrq->data->blocks * mrq->data->blksz > | |
118 | host->max_req_size); | |
fe4a3c7a | 119 | |
976d9276 PO |
120 | #ifdef CONFIG_MMC_DEBUG |
121 | sz = 0; | |
122 | for (i = 0;i < mrq->data->sg_len;i++) | |
123 | sz += mrq->data->sg[i].length; | |
124 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); | |
125 | #endif | |
126 | ||
1da177e4 LT |
127 | mrq->cmd->data = mrq->data; |
128 | mrq->data->error = 0; | |
129 | mrq->data->mrq = mrq; | |
130 | if (mrq->stop) { | |
131 | mrq->data->stop = mrq->stop; | |
132 | mrq->stop->error = 0; | |
133 | mrq->stop->mrq = mrq; | |
134 | } | |
135 | } | |
136 | host->ops->request(host, mrq); | |
137 | } | |
138 | ||
139 | EXPORT_SYMBOL(mmc_start_request); | |
140 | ||
141 | static void mmc_wait_done(struct mmc_request *mrq) | |
142 | { | |
143 | complete(mrq->done_data); | |
144 | } | |
145 | ||
146 | int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
147 | { | |
0afffc72 | 148 | DECLARE_COMPLETION_ONSTACK(complete); |
1da177e4 LT |
149 | |
150 | mrq->done_data = &complete; | |
151 | mrq->done = mmc_wait_done; | |
152 | ||
153 | mmc_start_request(host, mrq); | |
154 | ||
155 | wait_for_completion(&complete); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | EXPORT_SYMBOL(mmc_wait_for_req); | |
161 | ||
162 | /** | |
163 | * mmc_wait_for_cmd - start a command and wait for completion | |
164 | * @host: MMC host to start command | |
165 | * @cmd: MMC command to start | |
166 | * @retries: maximum number of retries | |
167 | * | |
168 | * Start a new MMC command for a host, and wait for the command | |
169 | * to complete. Return any error that occurred while the command | |
170 | * was executing. Do not attempt to parse the response. | |
171 | */ | |
172 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
173 | { | |
174 | struct mmc_request mrq; | |
175 | ||
f22ee4ed | 176 | BUG_ON(!host->claimed); |
1da177e4 LT |
177 | |
178 | memset(&mrq, 0, sizeof(struct mmc_request)); | |
179 | ||
180 | memset(cmd->resp, 0, sizeof(cmd->resp)); | |
181 | cmd->retries = retries; | |
182 | ||
183 | mrq.cmd = cmd; | |
184 | cmd->data = NULL; | |
185 | ||
186 | mmc_wait_for_req(host, &mrq); | |
187 | ||
188 | return cmd->error; | |
189 | } | |
190 | ||
191 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
192 | ||
335eadf2 PO |
193 | /** |
194 | * mmc_wait_for_app_cmd - start an application command and wait for | |
195 | completion | |
196 | * @host: MMC host to start command | |
197 | * @rca: RCA to send MMC_APP_CMD to | |
198 | * @cmd: MMC command to start | |
199 | * @retries: maximum number of retries | |
200 | * | |
201 | * Sends a MMC_APP_CMD, checks the card response, sends the command | |
202 | * in the parameter and waits for it to complete. Return any error | |
203 | * that occurred while the command was executing. Do not attempt to | |
204 | * parse the response. | |
205 | */ | |
206 | int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca, | |
207 | struct mmc_command *cmd, int retries) | |
208 | { | |
209 | struct mmc_request mrq; | |
210 | struct mmc_command appcmd; | |
211 | ||
212 | int i, err; | |
213 | ||
f22ee4ed | 214 | BUG_ON(!host->claimed); |
335eadf2 PO |
215 | BUG_ON(retries < 0); |
216 | ||
217 | err = MMC_ERR_INVALID; | |
218 | ||
219 | /* | |
220 | * We have to resend MMC_APP_CMD for each attempt so | |
221 | * we cannot use the retries field in mmc_command. | |
222 | */ | |
223 | for (i = 0;i <= retries;i++) { | |
224 | memset(&mrq, 0, sizeof(struct mmc_request)); | |
225 | ||
226 | appcmd.opcode = MMC_APP_CMD; | |
227 | appcmd.arg = rca << 16; | |
e9225176 | 228 | appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
335eadf2 PO |
229 | appcmd.retries = 0; |
230 | memset(appcmd.resp, 0, sizeof(appcmd.resp)); | |
231 | appcmd.data = NULL; | |
232 | ||
233 | mrq.cmd = &appcmd; | |
234 | appcmd.data = NULL; | |
235 | ||
236 | mmc_wait_for_req(host, &mrq); | |
237 | ||
238 | if (appcmd.error) { | |
239 | err = appcmd.error; | |
240 | continue; | |
241 | } | |
242 | ||
243 | /* Check that card supported application commands */ | |
244 | if (!(appcmd.resp[0] & R1_APP_CMD)) | |
245 | return MMC_ERR_FAILED; | |
246 | ||
247 | memset(&mrq, 0, sizeof(struct mmc_request)); | |
248 | ||
249 | memset(cmd->resp, 0, sizeof(cmd->resp)); | |
250 | cmd->retries = 0; | |
251 | ||
252 | mrq.cmd = cmd; | |
253 | cmd->data = NULL; | |
1da177e4 | 254 | |
335eadf2 PO |
255 | mmc_wait_for_req(host, &mrq); |
256 | ||
257 | err = cmd->error; | |
258 | if (cmd->error == MMC_ERR_NONE) | |
259 | break; | |
260 | } | |
261 | ||
262 | return err; | |
263 | } | |
264 | ||
265 | EXPORT_SYMBOL(mmc_wait_for_app_cmd); | |
1da177e4 | 266 | |
d773d725 RK |
267 | /** |
268 | * mmc_set_data_timeout - set the timeout for a data command | |
269 | * @data: data phase for command | |
270 | * @card: the MMC card associated with the data transfer | |
271 | * @write: flag to differentiate reads from writes | |
272 | */ | |
273 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, | |
274 | int write) | |
275 | { | |
276 | unsigned int mult; | |
277 | ||
278 | /* | |
279 | * SD cards use a 100 multiplier rather than 10 | |
280 | */ | |
281 | mult = mmc_card_sd(card) ? 100 : 10; | |
282 | ||
283 | /* | |
284 | * Scale up the multiplier (and therefore the timeout) by | |
285 | * the r2w factor for writes. | |
286 | */ | |
287 | if (write) | |
288 | mult <<= card->csd.r2w_factor; | |
289 | ||
290 | data->timeout_ns = card->csd.tacc_ns * mult; | |
291 | data->timeout_clks = card->csd.tacc_clks * mult; | |
292 | ||
293 | /* | |
294 | * SD cards also have an upper limit on the timeout. | |
295 | */ | |
296 | if (mmc_card_sd(card)) { | |
297 | unsigned int timeout_us, limit_us; | |
298 | ||
299 | timeout_us = data->timeout_ns / 1000; | |
300 | timeout_us += data->timeout_clks * 1000 / | |
301 | (card->host->ios.clock / 1000); | |
302 | ||
303 | if (write) | |
304 | limit_us = 250000; | |
305 | else | |
306 | limit_us = 100000; | |
307 | ||
fba68bd2 PL |
308 | /* |
309 | * SDHC cards always use these fixed values. | |
310 | */ | |
311 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
312 | data->timeout_ns = limit_us * 1000; |
313 | data->timeout_clks = 0; | |
314 | } | |
315 | } | |
316 | } | |
317 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
318 | ||
1da177e4 LT |
319 | /** |
320 | * __mmc_claim_host - exclusively claim a host | |
321 | * @host: mmc host to claim | |
322 | * @card: mmc card to claim host for | |
323 | * | |
324 | * Claim a host for a set of operations. If a valid card | |
325 | * is passed and this wasn't the last card selected, select | |
326 | * the card before returning. | |
327 | * | |
328 | * Note: you should use mmc_card_claim_host or mmc_claim_host. | |
329 | */ | |
b855885e | 330 | void mmc_claim_host(struct mmc_host *host) |
1da177e4 LT |
331 | { |
332 | DECLARE_WAITQUEUE(wait, current); | |
333 | unsigned long flags; | |
1da177e4 LT |
334 | |
335 | add_wait_queue(&host->wq, &wait); | |
336 | spin_lock_irqsave(&host->lock, flags); | |
337 | while (1) { | |
338 | set_current_state(TASK_UNINTERRUPTIBLE); | |
f22ee4ed | 339 | if (!host->claimed) |
1da177e4 LT |
340 | break; |
341 | spin_unlock_irqrestore(&host->lock, flags); | |
342 | schedule(); | |
343 | spin_lock_irqsave(&host->lock, flags); | |
344 | } | |
345 | set_current_state(TASK_RUNNING); | |
f22ee4ed | 346 | host->claimed = 1; |
1da177e4 LT |
347 | spin_unlock_irqrestore(&host->lock, flags); |
348 | remove_wait_queue(&host->wq, &wait); | |
1da177e4 LT |
349 | } |
350 | ||
b855885e | 351 | EXPORT_SYMBOL(mmc_claim_host); |
1da177e4 LT |
352 | |
353 | /** | |
354 | * mmc_release_host - release a host | |
355 | * @host: mmc host to release | |
356 | * | |
357 | * Release a MMC host, allowing others to claim the host | |
358 | * for their operations. | |
359 | */ | |
360 | void mmc_release_host(struct mmc_host *host) | |
361 | { | |
362 | unsigned long flags; | |
363 | ||
f22ee4ed | 364 | BUG_ON(!host->claimed); |
1da177e4 LT |
365 | |
366 | spin_lock_irqsave(&host->lock, flags); | |
f22ee4ed | 367 | host->claimed = 0; |
1da177e4 LT |
368 | spin_unlock_irqrestore(&host->lock, flags); |
369 | ||
370 | wake_up(&host->wq); | |
371 | } | |
372 | ||
373 | EXPORT_SYMBOL(mmc_release_host); | |
374 | ||
920e70c5 RK |
375 | static inline void mmc_set_ios(struct mmc_host *host) |
376 | { | |
377 | struct mmc_ios *ios = &host->ios; | |
378 | ||
cd9277c0 PO |
379 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
380 | "width %u timing %u\n", | |
920e70c5 RK |
381 | mmc_hostname(host), ios->clock, ios->bus_mode, |
382 | ios->power_mode, ios->chip_select, ios->vdd, | |
cd9277c0 | 383 | ios->bus_width, ios->timing); |
fba68bd2 | 384 | |
920e70c5 RK |
385 | host->ops->set_ios(host, ios); |
386 | } | |
387 | ||
b855885e | 388 | static int mmc_select_card(struct mmc_card *card) |
b57c43ad PO |
389 | { |
390 | int err; | |
391 | struct mmc_command cmd; | |
392 | ||
b855885e | 393 | BUG_ON(!card->host->claimed); |
b57c43ad PO |
394 | |
395 | cmd.opcode = MMC_SELECT_CARD; | |
396 | cmd.arg = card->rca << 16; | |
e9225176 | 397 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
b57c43ad | 398 | |
b855885e | 399 | err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES); |
b57c43ad PO |
400 | if (err != MMC_ERR_NONE) |
401 | return err; | |
402 | ||
f218278a | 403 | /* |
e45a1bd2 PL |
404 | * We can only change the bus width of SD cards when |
405 | * they are selected so we have to put the handling | |
f218278a | 406 | * here. |
e45a1bd2 PL |
407 | * |
408 | * The card is in 1 bit mode by default so | |
409 | * we only need to change if it supports the | |
410 | * wider version. | |
f218278a | 411 | */ |
e45a1bd2 | 412 | if (mmc_card_sd(card) && |
b855885e PO |
413 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) && |
414 | (card->host->caps & MMC_CAP_4_BIT_DATA)) { | |
e45a1bd2 | 415 | |
b855885e PO |
416 | struct mmc_command cmd; |
417 | cmd.opcode = SD_APP_SET_BUS_WIDTH; | |
418 | cmd.arg = SD_BUS_WIDTH_4; | |
419 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1da177e4 | 420 | |
b855885e PO |
421 | err = mmc_wait_for_app_cmd(card->host, card->rca, |
422 | &cmd, CMD_RETRIES); | |
423 | if (err != MMC_ERR_NONE) | |
424 | return err; | |
1da177e4 | 425 | |
b855885e PO |
426 | card->host->ios.bus_width = MMC_BUS_WIDTH_4; |
427 | mmc_set_ios(card->host); | |
1da177e4 | 428 | } |
b855885e PO |
429 | |
430 | return MMC_ERR_NONE; | |
1da177e4 LT |
431 | } |
432 | ||
433 | ||
434 | static inline void mmc_delay(unsigned int ms) | |
435 | { | |
73778120 PO |
436 | if (ms < 1000 / HZ) { |
437 | cond_resched(); | |
1da177e4 LT |
438 | mdelay(ms); |
439 | } else { | |
73778120 | 440 | msleep(ms); |
1da177e4 LT |
441 | } |
442 | } | |
443 | ||
444 | /* | |
445 | * Mask off any voltages we don't support and select | |
446 | * the lowest voltage | |
447 | */ | |
448 | static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) | |
449 | { | |
450 | int bit; | |
451 | ||
452 | ocr &= host->ocr_avail; | |
453 | ||
454 | bit = ffs(ocr); | |
455 | if (bit) { | |
456 | bit -= 1; | |
457 | ||
63ef731a | 458 | ocr &= 3 << bit; |
1da177e4 LT |
459 | |
460 | host->ios.vdd = bit; | |
920e70c5 | 461 | mmc_set_ios(host); |
1da177e4 LT |
462 | } else { |
463 | ocr = 0; | |
464 | } | |
465 | ||
466 | return ocr; | |
467 | } | |
468 | ||
469 | #define UNSTUFF_BITS(resp,start,size) \ | |
470 | ({ \ | |
471 | const int __size = size; \ | |
472 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
473 | const int __off = 3 - ((start) / 32); \ | |
474 | const int __shft = (start) & 31; \ | |
475 | u32 __res; \ | |
476 | \ | |
477 | __res = resp[__off] >> __shft; \ | |
478 | if (__size + __shft > 32) \ | |
479 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
480 | __res & __mask; \ | |
481 | }) | |
482 | ||
483 | /* | |
484 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
485 | */ | |
486 | static void mmc_decode_cid(struct mmc_card *card) | |
487 | { | |
488 | u32 *resp = card->raw_cid; | |
489 | ||
490 | memset(&card->cid, 0, sizeof(struct mmc_cid)); | |
491 | ||
335eadf2 PO |
492 | if (mmc_card_sd(card)) { |
493 | /* | |
494 | * SD doesn't currently have a version field so we will | |
495 | * have to assume we can parse this. | |
496 | */ | |
497 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
498 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
499 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
500 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
501 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
502 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
503 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
504 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); | |
505 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); | |
506 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); | |
507 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); | |
508 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); | |
509 | ||
510 | card->cid.year += 2000; /* SD cards year offset */ | |
a00fc090 | 511 | } else { |
335eadf2 PO |
512 | /* |
513 | * The selection of the format here is based upon published | |
514 | * specs from sandisk and from what people have reported. | |
515 | */ | |
516 | switch (card->csd.mmca_vsn) { | |
517 | case 0: /* MMC v1.0 - v1.2 */ | |
518 | case 1: /* MMC v1.4 */ | |
519 | card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); | |
520 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
521 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
522 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
523 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
524 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
525 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
526 | card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); | |
527 | card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); | |
528 | card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); | |
529 | card->cid.serial = UNSTUFF_BITS(resp, 16, 24); | |
530 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
531 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
532 | break; | |
533 | ||
534 | case 2: /* MMC v2.0 - v2.2 */ | |
535 | case 3: /* MMC v3.1 - v3.3 */ | |
cb757b4e | 536 | case 4: /* MMC v4 */ |
335eadf2 PO |
537 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); |
538 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
539 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
540 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
541 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
542 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
543 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
544 | card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); | |
545 | card->cid.serial = UNSTUFF_BITS(resp, 16, 32); | |
546 | card->cid.month = UNSTUFF_BITS(resp, 12, 4); | |
547 | card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; | |
548 | break; | |
549 | ||
550 | default: | |
551 | printk("%s: card has unknown MMCA version %d\n", | |
552 | mmc_hostname(card->host), card->csd.mmca_vsn); | |
553 | mmc_card_set_bad(card); | |
554 | break; | |
555 | } | |
1da177e4 LT |
556 | } |
557 | } | |
558 | ||
559 | /* | |
560 | * Given a 128-bit response, decode to our card CSD structure. | |
561 | */ | |
562 | static void mmc_decode_csd(struct mmc_card *card) | |
563 | { | |
564 | struct mmc_csd *csd = &card->csd; | |
565 | unsigned int e, m, csd_struct; | |
566 | u32 *resp = card->raw_csd; | |
567 | ||
335eadf2 PO |
568 | if (mmc_card_sd(card)) { |
569 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
fba68bd2 PL |
570 | |
571 | switch (csd_struct) { | |
572 | case 0: | |
573 | m = UNSTUFF_BITS(resp, 115, 4); | |
574 | e = UNSTUFF_BITS(resp, 112, 3); | |
575 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
576 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
577 | ||
578 | m = UNSTUFF_BITS(resp, 99, 4); | |
579 | e = UNSTUFF_BITS(resp, 96, 3); | |
580 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
581 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
582 | ||
583 | e = UNSTUFF_BITS(resp, 47, 3); | |
584 | m = UNSTUFF_BITS(resp, 62, 12); | |
585 | csd->capacity = (1 + m) << (e + 2); | |
586 | ||
587 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
588 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
589 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
590 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
591 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
592 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
593 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
594 | break; | |
595 | case 1: | |
596 | /* | |
597 | * This is a block-addressed SDHC card. Most | |
598 | * interesting fields are unused and have fixed | |
599 | * values. To avoid getting tripped by buggy cards, | |
600 | * we assume those fixed values ourselves. | |
601 | */ | |
602 | mmc_card_set_blockaddr(card); | |
603 | ||
604 | csd->tacc_ns = 0; /* Unused */ | |
605 | csd->tacc_clks = 0; /* Unused */ | |
606 | ||
607 | m = UNSTUFF_BITS(resp, 99, 4); | |
608 | e = UNSTUFF_BITS(resp, 96, 3); | |
609 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
610 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
611 | ||
612 | m = UNSTUFF_BITS(resp, 48, 22); | |
613 | csd->capacity = (1 + m) << 10; | |
614 | ||
615 | csd->read_blkbits = 9; | |
616 | csd->read_partial = 0; | |
617 | csd->write_misalign = 0; | |
618 | csd->read_misalign = 0; | |
619 | csd->r2w_factor = 4; /* Unused */ | |
620 | csd->write_blkbits = 9; | |
621 | csd->write_partial = 0; | |
622 | break; | |
623 | default: | |
335eadf2 PO |
624 | printk("%s: unrecognised CSD structure version %d\n", |
625 | mmc_hostname(card->host), csd_struct); | |
626 | mmc_card_set_bad(card); | |
627 | return; | |
628 | } | |
a00fc090 | 629 | } else { |
335eadf2 PO |
630 | /* |
631 | * We only understand CSD structure v1.1 and v1.2. | |
632 | * v1.2 has extra information in bits 15, 11 and 10. | |
633 | */ | |
634 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
635 | if (csd_struct != 1 && csd_struct != 2) { | |
636 | printk("%s: unrecognised CSD structure version %d\n", | |
637 | mmc_hostname(card->host), csd_struct); | |
638 | mmc_card_set_bad(card); | |
639 | return; | |
640 | } | |
1da177e4 | 641 | |
335eadf2 PO |
642 | csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); |
643 | m = UNSTUFF_BITS(resp, 115, 4); | |
644 | e = UNSTUFF_BITS(resp, 112, 3); | |
645 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
646 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
1da177e4 | 647 | |
335eadf2 PO |
648 | m = UNSTUFF_BITS(resp, 99, 4); |
649 | e = UNSTUFF_BITS(resp, 96, 3); | |
650 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
651 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
1da177e4 | 652 | |
335eadf2 PO |
653 | e = UNSTUFF_BITS(resp, 47, 3); |
654 | m = UNSTUFF_BITS(resp, 62, 12); | |
655 | csd->capacity = (1 + m) << (e + 2); | |
1da177e4 | 656 | |
335eadf2 | 657 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); |
a6f6c96b RK |
658 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); |
659 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
660 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
37be4e78 | 661 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); |
a6f6c96b RK |
662 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); |
663 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
335eadf2 | 664 | } |
1da177e4 LT |
665 | } |
666 | ||
b57c43ad PO |
667 | /* |
668 | * Given a 64-bit response, decode to our card SCR structure. | |
669 | */ | |
670 | static void mmc_decode_scr(struct mmc_card *card) | |
671 | { | |
672 | struct sd_scr *scr = &card->scr; | |
673 | unsigned int scr_struct; | |
674 | u32 resp[4]; | |
675 | ||
676 | BUG_ON(!mmc_card_sd(card)); | |
677 | ||
678 | resp[3] = card->raw_scr[1]; | |
679 | resp[2] = card->raw_scr[0]; | |
680 | ||
681 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
682 | if (scr_struct != 0) { | |
683 | printk("%s: unrecognised SCR structure version %d\n", | |
684 | mmc_hostname(card->host), scr_struct); | |
685 | mmc_card_set_bad(card); | |
686 | return; | |
687 | } | |
688 | ||
689 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
690 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
691 | } | |
692 | ||
1da177e4 | 693 | /* |
b855885e | 694 | * Allocate a new MMC card |
1da177e4 LT |
695 | */ |
696 | static struct mmc_card * | |
b855885e | 697 | mmc_alloc_card(struct mmc_host *host, u32 *raw_cid) |
1da177e4 | 698 | { |
b855885e | 699 | struct mmc_card *card; |
1da177e4 LT |
700 | |
701 | card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); | |
702 | if (!card) | |
703 | return ERR_PTR(-ENOMEM); | |
704 | ||
705 | mmc_init_card(card, host); | |
706 | memcpy(card->raw_cid, raw_cid, sizeof(card->raw_cid)); | |
707 | ||
1da177e4 LT |
708 | return card; |
709 | } | |
710 | ||
711 | /* | |
712 | * Tell attached cards to go to IDLE state | |
713 | */ | |
714 | static void mmc_idle_cards(struct mmc_host *host) | |
715 | { | |
716 | struct mmc_command cmd; | |
717 | ||
865e9f13 | 718 | host->ios.chip_select = MMC_CS_HIGH; |
920e70c5 | 719 | mmc_set_ios(host); |
865e9f13 PO |
720 | |
721 | mmc_delay(1); | |
722 | ||
1da177e4 LT |
723 | cmd.opcode = MMC_GO_IDLE_STATE; |
724 | cmd.arg = 0; | |
e9225176 | 725 | cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; |
1da177e4 LT |
726 | |
727 | mmc_wait_for_cmd(host, &cmd, 0); | |
728 | ||
729 | mmc_delay(1); | |
865e9f13 PO |
730 | |
731 | host->ios.chip_select = MMC_CS_DONTCARE; | |
920e70c5 | 732 | mmc_set_ios(host); |
865e9f13 PO |
733 | |
734 | mmc_delay(1); | |
1da177e4 LT |
735 | } |
736 | ||
737 | /* | |
45f8245b RK |
738 | * Apply power to the MMC stack. This is a two-stage process. |
739 | * First, we enable power to the card without the clock running. | |
740 | * We then wait a bit for the power to stabilise. Finally, | |
741 | * enable the bus drivers and clock to the card. | |
742 | * | |
743 | * We must _NOT_ enable the clock prior to power stablising. | |
744 | * | |
745 | * If a host does all the power sequencing itself, ignore the | |
746 | * initial MMC_POWER_UP stage. | |
1da177e4 LT |
747 | */ |
748 | static void mmc_power_up(struct mmc_host *host) | |
749 | { | |
750 | int bit = fls(host->ocr_avail) - 1; | |
751 | ||
752 | host->ios.vdd = bit; | |
753 | host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; | |
865e9f13 | 754 | host->ios.chip_select = MMC_CS_DONTCARE; |
1da177e4 | 755 | host->ios.power_mode = MMC_POWER_UP; |
f218278a | 756 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
cd9277c0 | 757 | host->ios.timing = MMC_TIMING_LEGACY; |
920e70c5 | 758 | mmc_set_ios(host); |
1da177e4 LT |
759 | |
760 | mmc_delay(1); | |
761 | ||
762 | host->ios.clock = host->f_min; | |
763 | host->ios.power_mode = MMC_POWER_ON; | |
920e70c5 | 764 | mmc_set_ios(host); |
1da177e4 LT |
765 | |
766 | mmc_delay(2); | |
767 | } | |
768 | ||
769 | static void mmc_power_off(struct mmc_host *host) | |
770 | { | |
771 | host->ios.clock = 0; | |
772 | host->ios.vdd = 0; | |
773 | host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; | |
865e9f13 | 774 | host->ios.chip_select = MMC_CS_DONTCARE; |
1da177e4 | 775 | host->ios.power_mode = MMC_POWER_OFF; |
f218278a | 776 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
cd9277c0 | 777 | host->ios.timing = MMC_TIMING_LEGACY; |
920e70c5 | 778 | mmc_set_ios(host); |
1da177e4 LT |
779 | } |
780 | ||
781 | static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) | |
782 | { | |
783 | struct mmc_command cmd; | |
784 | int i, err = 0; | |
785 | ||
786 | cmd.opcode = MMC_SEND_OP_COND; | |
787 | cmd.arg = ocr; | |
e9225176 | 788 | cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; |
1da177e4 LT |
789 | |
790 | for (i = 100; i; i--) { | |
791 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
792 | if (err != MMC_ERR_NONE) | |
793 | break; | |
794 | ||
795 | if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) | |
796 | break; | |
797 | ||
798 | err = MMC_ERR_TIMEOUT; | |
799 | ||
800 | mmc_delay(10); | |
801 | } | |
802 | ||
803 | if (rocr) | |
804 | *rocr = cmd.resp[0]; | |
805 | ||
806 | return err; | |
807 | } | |
808 | ||
335eadf2 PO |
809 | static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
810 | { | |
811 | struct mmc_command cmd; | |
812 | int i, err = 0; | |
813 | ||
814 | cmd.opcode = SD_APP_OP_COND; | |
815 | cmd.arg = ocr; | |
e9225176 | 816 | cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; |
335eadf2 PO |
817 | |
818 | for (i = 100; i; i--) { | |
819 | err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES); | |
820 | if (err != MMC_ERR_NONE) | |
821 | break; | |
822 | ||
823 | if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) | |
824 | break; | |
825 | ||
826 | err = MMC_ERR_TIMEOUT; | |
827 | ||
828 | mmc_delay(10); | |
829 | } | |
830 | ||
831 | if (rocr) | |
832 | *rocr = cmd.resp[0]; | |
833 | ||
834 | return err; | |
835 | } | |
836 | ||
fba68bd2 PL |
837 | static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2) |
838 | { | |
839 | struct mmc_command cmd; | |
840 | int err, sd2; | |
841 | static const u8 test_pattern = 0xAA; | |
842 | ||
843 | /* | |
844 | * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND | |
845 | * before SD_APP_OP_COND. This command will harmlessly fail for | |
846 | * SD 1.0 cards. | |
847 | */ | |
848 | cmd.opcode = SD_SEND_IF_COND; | |
849 | cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; | |
850 | cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; | |
851 | ||
852 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
853 | if (err == MMC_ERR_NONE) { | |
854 | if ((cmd.resp[0] & 0xFF) == test_pattern) { | |
855 | sd2 = 1; | |
856 | } else { | |
857 | sd2 = 0; | |
858 | err = MMC_ERR_FAILED; | |
859 | } | |
860 | } else { | |
861 | /* | |
862 | * Treat errors as SD 1.0 card. | |
863 | */ | |
864 | sd2 = 0; | |
865 | err = MMC_ERR_NONE; | |
866 | } | |
867 | if (rsd2) | |
868 | *rsd2 = sd2; | |
869 | return err; | |
870 | } | |
871 | ||
1da177e4 | 872 | /* |
b855885e | 873 | * Discover the card by requesting its CID. |
1da177e4 | 874 | * |
b855885e | 875 | * Create a mmc_card entry for the discovered card, assigning |
1da177e4 LT |
876 | * it an RCA, and save the raw CID for decoding later. |
877 | */ | |
b855885e | 878 | static void mmc_discover_card(struct mmc_host *host) |
1da177e4 | 879 | { |
b855885e | 880 | unsigned int err; |
1da177e4 | 881 | |
b855885e | 882 | struct mmc_command cmd; |
1da177e4 | 883 | |
b855885e PO |
884 | BUG_ON(host->card); |
885 | ||
886 | cmd.opcode = MMC_ALL_SEND_CID; | |
887 | cmd.arg = 0; | |
888 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; | |
889 | ||
890 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); | |
891 | if (err == MMC_ERR_TIMEOUT) { | |
892 | err = MMC_ERR_NONE; | |
893 | return; | |
894 | } | |
895 | if (err != MMC_ERR_NONE) { | |
896 | printk(KERN_ERR "%s: error requesting CID: %d\n", | |
897 | mmc_hostname(host), err); | |
898 | return; | |
899 | } | |
900 | ||
901 | host->card = mmc_alloc_card(host, cmd.resp); | |
902 | if (IS_ERR(host->card)) { | |
903 | err = PTR_ERR(host->card); | |
904 | host->card = NULL; | |
905 | return; | |
906 | } | |
907 | ||
908 | if (host->mode == MMC_MODE_SD) { | |
909 | host->card->type = MMC_TYPE_SD; | |
910 | ||
911 | cmd.opcode = SD_SEND_RELATIVE_ADDR; | |
1da177e4 | 912 | cmd.arg = 0; |
b855885e | 913 | cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; |
1da177e4 LT |
914 | |
915 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); | |
b855885e PO |
916 | if (err != MMC_ERR_NONE) |
917 | mmc_card_set_dead(host->card); | |
918 | else { | |
919 | host->card->rca = cmd.resp[0] >> 16; | |
920 | ||
921 | if (!host->ops->get_ro) { | |
922 | printk(KERN_WARNING "%s: host does not " | |
923 | "support reading read-only " | |
924 | "switch. assuming write-enable.\n", | |
925 | mmc_hostname(host)); | |
926 | } else { | |
927 | if (host->ops->get_ro(host)) | |
928 | mmc_card_set_readonly(host->card); | |
1da177e4 | 929 | } |
1da177e4 | 930 | } |
b855885e PO |
931 | } else { |
932 | host->card->type = MMC_TYPE_MMC; | |
933 | host->card->rca = 1; | |
1da177e4 | 934 | |
b855885e PO |
935 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
936 | cmd.arg = host->card->rca << 16; | |
937 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
938 | ||
939 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); | |
940 | if (err != MMC_ERR_NONE) | |
941 | mmc_card_set_dead(host->card); | |
1da177e4 LT |
942 | } |
943 | } | |
944 | ||
b855885e | 945 | static void mmc_read_csd(struct mmc_host *host) |
1da177e4 | 946 | { |
b855885e PO |
947 | struct mmc_command cmd; |
948 | int err; | |
1da177e4 | 949 | |
b855885e PO |
950 | if (!host->card) |
951 | return; | |
952 | if (mmc_card_dead(host->card)) | |
953 | return; | |
1da177e4 | 954 | |
b855885e PO |
955 | cmd.opcode = MMC_SEND_CSD; |
956 | cmd.arg = host->card->rca << 16; | |
957 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; | |
1da177e4 | 958 | |
b855885e PO |
959 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); |
960 | if (err != MMC_ERR_NONE) { | |
961 | mmc_card_set_dead(host->card); | |
962 | return; | |
963 | } | |
1da177e4 | 964 | |
b855885e | 965 | memcpy(host->card->raw_csd, cmd.resp, sizeof(host->card->raw_csd)); |
1da177e4 | 966 | |
b855885e PO |
967 | mmc_decode_csd(host->card); |
968 | mmc_decode_cid(host->card); | |
1da177e4 LT |
969 | } |
970 | ||
b855885e | 971 | static void mmc_process_ext_csd(struct mmc_host *host) |
bce40a36 PL |
972 | { |
973 | int err; | |
bce40a36 PL |
974 | |
975 | struct mmc_request mrq; | |
976 | struct mmc_command cmd; | |
977 | struct mmc_data data; | |
978 | ||
b855885e | 979 | u8 *ext_csd; |
bce40a36 PL |
980 | struct scatterlist sg; |
981 | ||
b855885e PO |
982 | if (!host->card) |
983 | return; | |
984 | if (mmc_card_dead(host->card)) | |
985 | return; | |
986 | if (mmc_card_sd(host->card)) | |
987 | return; | |
988 | if (host->card->csd.mmca_vsn < CSD_SPEC_VER_4) | |
989 | return; | |
990 | ||
bce40a36 PL |
991 | /* |
992 | * As the ext_csd is so large and mostly unused, we don't store the | |
993 | * raw block in mmc_card. | |
994 | */ | |
bce40a36 PL |
995 | ext_csd = kmalloc(512, GFP_KERNEL); |
996 | if (!ext_csd) { | |
997 | printk("%s: could not allocate a buffer to receive the ext_csd." | |
998 | "mmc v4 cards will be treated as v3.\n", | |
999 | mmc_hostname(host)); | |
1000 | return; | |
1001 | } | |
1002 | ||
b855885e | 1003 | memset(&cmd, 0, sizeof(struct mmc_command)); |
bce40a36 | 1004 | |
b855885e PO |
1005 | cmd.opcode = MMC_SEND_EXT_CSD; |
1006 | cmd.arg = 0; | |
1007 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
bce40a36 | 1008 | |
b855885e | 1009 | memset(&data, 0, sizeof(struct mmc_data)); |
bce40a36 | 1010 | |
b855885e | 1011 | mmc_set_data_timeout(&data, host->card, 0); |
bce40a36 | 1012 | |
b855885e PO |
1013 | data.blksz = 512; |
1014 | data.blocks = 1; | |
1015 | data.flags = MMC_DATA_READ; | |
1016 | data.sg = &sg; | |
1017 | data.sg_len = 1; | |
bce40a36 | 1018 | |
b855885e | 1019 | memset(&mrq, 0, sizeof(struct mmc_request)); |
bce40a36 | 1020 | |
b855885e PO |
1021 | mrq.cmd = &cmd; |
1022 | mrq.data = &data; | |
bce40a36 | 1023 | |
b855885e | 1024 | sg_init_one(&sg, ext_csd, 512); |
bce40a36 | 1025 | |
b855885e | 1026 | mmc_wait_for_req(host, &mrq); |
bce40a36 | 1027 | |
b855885e PO |
1028 | if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { |
1029 | if (host->card->csd.capacity == (4096 * 512)) { | |
1030 | printk(KERN_ERR "%s: unable to read EXT_CSD " | |
1031 | "on a possible high capacity card. " | |
1032 | "Card will be ignored.\n", | |
1033 | mmc_hostname(host)); | |
1034 | mmc_card_set_dead(host->card); | |
1035 | } else { | |
1036 | printk(KERN_WARNING "%s: unable to read " | |
1037 | "EXT_CSD, performance might " | |
1038 | "suffer.\n", | |
1039 | mmc_hostname(host)); | |
bce40a36 | 1040 | } |
b855885e PO |
1041 | goto out; |
1042 | } | |
bce40a36 | 1043 | |
b855885e PO |
1044 | host->card->ext_csd.sectors = |
1045 | ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | | |
1046 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | | |
1047 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | | |
1048 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; | |
1049 | if (host->card->ext_csd.sectors) | |
1050 | mmc_card_set_blockaddr(host->card); | |
1051 | ||
1052 | switch (ext_csd[EXT_CSD_CARD_TYPE]) { | |
1053 | case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: | |
1054 | host->card->ext_csd.hs_max_dtr = 52000000; | |
1055 | break; | |
1056 | case EXT_CSD_CARD_TYPE_26: | |
1057 | host->card->ext_csd.hs_max_dtr = 26000000; | |
1058 | break; | |
1059 | default: | |
1060 | /* MMC v4 spec says this cannot happen */ | |
1061 | printk("%s: card is mmc v4 but doesn't support " | |
1062 | "any high-speed modes.\n", | |
1063 | mmc_hostname(host)); | |
1064 | goto out; | |
1065 | } | |
85a18ad9 | 1066 | |
b855885e PO |
1067 | if (host->caps & MMC_CAP_MMC_HIGHSPEED) { |
1068 | /* Activate highspeed support. */ | |
1069 | cmd.opcode = MMC_SWITCH; | |
1070 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1071 | (EXT_CSD_HS_TIMING << 16) | | |
1072 | (1 << 8) | | |
1073 | EXT_CSD_CMD_SET_NORMAL; | |
1074 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; | |
bce40a36 | 1075 | |
b855885e PO |
1076 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); |
1077 | if (err != MMC_ERR_NONE) { | |
1078 | printk("%s: failed to switch card to mmc v4 " | |
1079 | "high-speed mode.\n", | |
1080 | mmc_hostname(host)); | |
1081 | goto out; | |
1082 | } | |
bce40a36 | 1083 | |
b855885e | 1084 | mmc_card_set_highspeed(host->card); |
e45a1bd2 | 1085 | |
b855885e PO |
1086 | host->ios.timing = MMC_TIMING_MMC_HS; |
1087 | mmc_set_ios(host); | |
1088 | } | |
e45a1bd2 | 1089 | |
b855885e PO |
1090 | /* Check for host support for wide-bus modes. */ |
1091 | if (host->caps & MMC_CAP_4_BIT_DATA) { | |
1092 | /* Activate 4-bit support. */ | |
1093 | cmd.opcode = MMC_SWITCH; | |
1094 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
1095 | (EXT_CSD_BUS_WIDTH << 16) | | |
1096 | (EXT_CSD_BUS_WIDTH_4 << 8) | | |
1097 | EXT_CSD_CMD_SET_NORMAL; | |
1098 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; | |
e45a1bd2 | 1099 | |
b855885e PO |
1100 | err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); |
1101 | if (err != MMC_ERR_NONE) { | |
1102 | printk("%s: failed to switch card to " | |
1103 | "mmc v4 4-bit bus mode.\n", | |
1104 | mmc_hostname(host)); | |
1105 | goto out; | |
cd9277c0 | 1106 | } |
b855885e PO |
1107 | |
1108 | host->ios.bus_width = MMC_BUS_WIDTH_4; | |
1109 | mmc_set_ios(host); | |
bce40a36 PL |
1110 | } |
1111 | ||
b855885e | 1112 | out: |
bce40a36 | 1113 | kfree(ext_csd); |
bce40a36 PL |
1114 | } |
1115 | ||
b855885e | 1116 | static void mmc_read_scr(struct mmc_host *host) |
b57c43ad PO |
1117 | { |
1118 | int err; | |
b57c43ad PO |
1119 | struct mmc_request mrq; |
1120 | struct mmc_command cmd; | |
1121 | struct mmc_data data; | |
b57c43ad PO |
1122 | struct scatterlist sg; |
1123 | ||
b855885e PO |
1124 | if (!host->card) |
1125 | return; | |
1126 | if (mmc_card_dead(host->card)) | |
1127 | return; | |
1128 | if (!mmc_card_sd(host->card)) | |
1129 | return; | |
b57c43ad | 1130 | |
b855885e | 1131 | memset(&cmd, 0, sizeof(struct mmc_command)); |
b57c43ad | 1132 | |
b855885e PO |
1133 | cmd.opcode = MMC_APP_CMD; |
1134 | cmd.arg = host->card->rca << 16; | |
1135 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
b57c43ad | 1136 | |
b855885e PO |
1137 | err = mmc_wait_for_cmd(host, &cmd, 0); |
1138 | if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) { | |
1139 | mmc_card_set_dead(host->card); | |
1140 | return; | |
1141 | } | |
b57c43ad | 1142 | |
b855885e | 1143 | memset(&cmd, 0, sizeof(struct mmc_command)); |
b57c43ad | 1144 | |
b855885e PO |
1145 | cmd.opcode = SD_APP_SEND_SCR; |
1146 | cmd.arg = 0; | |
1147 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
385e3227 | 1148 | |
b855885e | 1149 | memset(&data, 0, sizeof(struct mmc_data)); |
b57c43ad | 1150 | |
b855885e | 1151 | mmc_set_data_timeout(&data, host->card, 0); |
b57c43ad | 1152 | |
b855885e PO |
1153 | data.blksz = 1 << 3; |
1154 | data.blocks = 1; | |
1155 | data.flags = MMC_DATA_READ; | |
1156 | data.sg = &sg; | |
1157 | data.sg_len = 1; | |
b57c43ad | 1158 | |
b855885e | 1159 | memset(&mrq, 0, sizeof(struct mmc_request)); |
b57c43ad | 1160 | |
b855885e PO |
1161 | mrq.cmd = &cmd; |
1162 | mrq.data = &data; | |
e781de44 | 1163 | |
b855885e | 1164 | sg_init_one(&sg, (u8*)host->card->raw_scr, 8); |
b57c43ad | 1165 | |
b855885e | 1166 | mmc_wait_for_req(host, &mrq); |
b57c43ad | 1167 | |
b855885e PO |
1168 | if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { |
1169 | mmc_card_set_dead(host->card); | |
1170 | return; | |
b57c43ad PO |
1171 | } |
1172 | ||
b855885e PO |
1173 | host->card->raw_scr[0] = ntohl(host->card->raw_scr[0]); |
1174 | host->card->raw_scr[1] = ntohl(host->card->raw_scr[1]); | |
1175 | ||
1176 | mmc_decode_scr(host->card); | |
b57c43ad PO |
1177 | } |
1178 | ||
7ccd266e PO |
1179 | static void mmc_read_switch_caps(struct mmc_host *host) |
1180 | { | |
7ccd266e PO |
1181 | struct mmc_request mrq; |
1182 | struct mmc_command cmd; | |
1183 | struct mmc_data data; | |
1184 | unsigned char *status; | |
1185 | struct scatterlist sg; | |
1186 | ||
cd9277c0 PO |
1187 | if (!(host->caps & MMC_CAP_SD_HIGHSPEED)) |
1188 | return; | |
1189 | ||
b855885e PO |
1190 | if (!host->card) |
1191 | return; | |
1192 | if (mmc_card_dead(host->card)) | |
1193 | return; | |
1194 | if (!mmc_card_sd(host->card)) | |
1195 | return; | |
1196 | if (host->card->scr.sda_vsn < SCR_SPEC_VER_1) | |
1197 | return; | |
1198 | ||
7ccd266e PO |
1199 | status = kmalloc(64, GFP_KERNEL); |
1200 | if (!status) { | |
1201 | printk(KERN_WARNING "%s: Unable to allocate buffer for " | |
1202 | "reading switch capabilities.\n", | |
1203 | mmc_hostname(host)); | |
1204 | return; | |
1205 | } | |
1206 | ||
b855885e | 1207 | memset(&cmd, 0, sizeof(struct mmc_command)); |
7ccd266e | 1208 | |
b855885e PO |
1209 | cmd.opcode = SD_SWITCH; |
1210 | cmd.arg = 0x00FFFFF1; | |
1211 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
7ccd266e | 1212 | |
b855885e | 1213 | memset(&data, 0, sizeof(struct mmc_data)); |
7ccd266e | 1214 | |
b855885e | 1215 | mmc_set_data_timeout(&data, host->card, 0); |
7ccd266e | 1216 | |
b855885e PO |
1217 | data.blksz = 64; |
1218 | data.blocks = 1; | |
1219 | data.flags = MMC_DATA_READ; | |
1220 | data.sg = &sg; | |
1221 | data.sg_len = 1; | |
7ccd266e | 1222 | |
b855885e | 1223 | memset(&mrq, 0, sizeof(struct mmc_request)); |
7ccd266e | 1224 | |
b855885e PO |
1225 | mrq.cmd = &cmd; |
1226 | mrq.data = &data; | |
7ccd266e | 1227 | |
b855885e | 1228 | sg_init_one(&sg, status, 64); |
7ccd266e | 1229 | |
b855885e | 1230 | mmc_wait_for_req(host, &mrq); |
7ccd266e | 1231 | |
b855885e PO |
1232 | if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { |
1233 | printk("%s: unable to read switch capabilities, " | |
1234 | "performance might suffer.\n", | |
1235 | mmc_hostname(host)); | |
1236 | goto out; | |
1237 | } | |
7ccd266e | 1238 | |
b855885e PO |
1239 | if (status[13] & 0x02) |
1240 | host->card->sw_caps.hs_max_dtr = 50000000; | |
7ccd266e | 1241 | |
b855885e | 1242 | memset(&cmd, 0, sizeof(struct mmc_command)); |
7ccd266e | 1243 | |
b855885e PO |
1244 | cmd.opcode = SD_SWITCH; |
1245 | cmd.arg = 0x80FFFFF1; | |
1246 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
7ccd266e | 1247 | |
b855885e | 1248 | memset(&data, 0, sizeof(struct mmc_data)); |
7ccd266e | 1249 | |
b855885e | 1250 | mmc_set_data_timeout(&data, host->card, 0); |
7ccd266e | 1251 | |
b855885e PO |
1252 | data.blksz = 64; |
1253 | data.blocks = 1; | |
1254 | data.flags = MMC_DATA_READ; | |
1255 | data.sg = &sg; | |
1256 | data.sg_len = 1; | |
7ccd266e | 1257 | |
b855885e | 1258 | memset(&mrq, 0, sizeof(struct mmc_request)); |
7ccd266e | 1259 | |
b855885e PO |
1260 | mrq.cmd = &cmd; |
1261 | mrq.data = &data; | |
7ccd266e | 1262 | |
b855885e | 1263 | sg_init_one(&sg, status, 64); |
7ccd266e | 1264 | |
b855885e | 1265 | mmc_wait_for_req(host, &mrq); |
7ccd266e | 1266 | |
b855885e PO |
1267 | if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE || |
1268 | (status[16] & 0xF) != 1) { | |
1269 | printk(KERN_WARNING "%s: Problem switching card " | |
1270 | "into high-speed mode!\n", | |
1271 | mmc_hostname(host)); | |
1272 | goto out; | |
1273 | } | |
7ccd266e | 1274 | |
b855885e | 1275 | mmc_card_set_highspeed(host->card); |
cd9277c0 | 1276 | |
b855885e PO |
1277 | host->ios.timing = MMC_TIMING_SD_HS; |
1278 | mmc_set_ios(host); | |
7ccd266e | 1279 | |
b855885e | 1280 | out: |
7ccd266e | 1281 | kfree(status); |
7ccd266e PO |
1282 | } |
1283 | ||
1da177e4 LT |
1284 | static unsigned int mmc_calculate_clock(struct mmc_host *host) |
1285 | { | |
1da177e4 LT |
1286 | unsigned int max_dtr = host->f_max; |
1287 | ||
b855885e PO |
1288 | if (host->card && !mmc_card_dead(host->card)) { |
1289 | if (mmc_card_highspeed(host->card) && mmc_card_sd(host->card)) { | |
1290 | if (max_dtr > host->card->sw_caps.hs_max_dtr) | |
1291 | max_dtr = host->card->sw_caps.hs_max_dtr; | |
1292 | } else if (mmc_card_highspeed(host->card) && !mmc_card_sd(host->card)) { | |
1293 | if (max_dtr > host->card->ext_csd.hs_max_dtr) | |
1294 | max_dtr = host->card->ext_csd.hs_max_dtr; | |
1295 | } else if (max_dtr > host->card->csd.max_dtr) { | |
1296 | max_dtr = host->card->csd.max_dtr; | |
bce40a36 | 1297 | } |
b855885e | 1298 | } |
1da177e4 | 1299 | |
920e70c5 RK |
1300 | pr_debug("%s: selected %d.%03dMHz transfer rate\n", |
1301 | mmc_hostname(host), | |
c6563178 | 1302 | max_dtr / 1000000, (max_dtr / 1000) % 1000); |
1da177e4 LT |
1303 | |
1304 | return max_dtr; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Check whether cards we already know about are still present. | |
1309 | * We do this by requesting status, and checking whether a card | |
1310 | * responds. | |
1311 | * | |
1312 | * A request for status does not cause a state change in data | |
1313 | * transfer mode. | |
1314 | */ | |
b855885e | 1315 | static void mmc_check_card(struct mmc_card *card) |
1da177e4 | 1316 | { |
b855885e PO |
1317 | struct mmc_command cmd; |
1318 | int err; | |
1da177e4 | 1319 | |
b855885e | 1320 | BUG_ON(!card); |
1da177e4 | 1321 | |
b855885e PO |
1322 | cmd.opcode = MMC_SEND_STATUS; |
1323 | cmd.arg = card->rca << 16; | |
1324 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1da177e4 | 1325 | |
b855885e PO |
1326 | err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES); |
1327 | if (err == MMC_ERR_NONE) | |
1328 | return; | |
1da177e4 | 1329 | |
b855885e | 1330 | mmc_card_set_dead(card); |
1da177e4 LT |
1331 | } |
1332 | ||
1333 | static void mmc_setup(struct mmc_host *host) | |
1334 | { | |
b855885e PO |
1335 | int err; |
1336 | u32 ocr; | |
1da177e4 | 1337 | |
b855885e | 1338 | host->mode = MMC_MODE_SD; |
335eadf2 | 1339 | |
b855885e PO |
1340 | mmc_power_up(host); |
1341 | mmc_idle_cards(host); | |
1da177e4 | 1342 | |
b855885e PO |
1343 | err = mmc_send_if_cond(host, host->ocr_avail, NULL); |
1344 | if (err != MMC_ERR_NONE) { | |
1345 | return; | |
1346 | } | |
1347 | err = mmc_send_app_op_cond(host, 0, &ocr); | |
1da177e4 | 1348 | |
b855885e PO |
1349 | /* |
1350 | * If we fail to detect any SD cards then try | |
1351 | * searching for MMC cards. | |
1352 | */ | |
1353 | if (err != MMC_ERR_NONE) { | |
1354 | host->mode = MMC_MODE_MMC; | |
1da177e4 | 1355 | |
b855885e PO |
1356 | err = mmc_send_op_cond(host, 0, &ocr); |
1357 | if (err != MMC_ERR_NONE) | |
1358 | return; | |
1da177e4 LT |
1359 | } |
1360 | ||
b855885e PO |
1361 | host->ocr = mmc_select_voltage(host, ocr); |
1362 | ||
1da177e4 LT |
1363 | if (host->ocr == 0) |
1364 | return; | |
1365 | ||
b855885e PO |
1366 | /* |
1367 | * Since we're changing the OCR value, we seem to | |
1368 | * need to tell some cards to go back to the idle | |
1369 | * state. We wait 1ms to give cards time to | |
1370 | * respond. | |
1371 | */ | |
1372 | mmc_idle_cards(host); | |
1373 | ||
1da177e4 LT |
1374 | /* |
1375 | * Send the selected OCR multiple times... until the cards | |
1376 | * all get the idea that they should be ready for CMD2. | |
1377 | * (My SanDisk card seems to need this.) | |
1378 | */ | |
fba68bd2 PL |
1379 | if (host->mode == MMC_MODE_SD) { |
1380 | int err, sd2; | |
1381 | err = mmc_send_if_cond(host, host->ocr, &sd2); | |
1382 | if (err == MMC_ERR_NONE) { | |
1383 | /* | |
1384 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
1385 | * compliant card and we should set bit 30 | |
1386 | * of the ocr to indicate that we can handle | |
1387 | * block-addressed SDHC cards. | |
1388 | */ | |
1389 | mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL); | |
1390 | } | |
1391 | } else { | |
85a18ad9 PO |
1392 | /* The extra bit indicates that we support high capacity */ |
1393 | mmc_send_op_cond(host, host->ocr | (1 << 30), NULL); | |
fba68bd2 | 1394 | } |
1da177e4 | 1395 | |
b855885e | 1396 | mmc_discover_card(host); |
1da177e4 LT |
1397 | |
1398 | /* | |
1399 | * Ok, now switch to push-pull mode. | |
1400 | */ | |
1401 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
920e70c5 | 1402 | mmc_set_ios(host); |
1da177e4 | 1403 | |
b855885e PO |
1404 | mmc_read_csd(host); |
1405 | ||
1406 | if (host->card && !mmc_card_dead(host->card)) { | |
1407 | err = mmc_select_card(host->card); | |
1408 | if (err != MMC_ERR_NONE) | |
1409 | mmc_card_set_dead(host->card); | |
1410 | } | |
b57c43ad | 1411 | |
7ccd266e | 1412 | if (host->mode == MMC_MODE_SD) { |
b855885e | 1413 | mmc_read_scr(host); |
7ccd266e PO |
1414 | mmc_read_switch_caps(host); |
1415 | } else | |
b855885e | 1416 | mmc_process_ext_csd(host); |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | ||
1420 | /** | |
1421 | * mmc_detect_change - process change of state on a MMC socket | |
1422 | * @host: host which changed state. | |
8dc00335 | 1423 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 LT |
1424 | * |
1425 | * All we know is that card(s) have been inserted or removed | |
1426 | * from the socket(s). We don't know which socket or cards. | |
1427 | */ | |
8dc00335 | 1428 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1429 | { |
3b91e550 PO |
1430 | #ifdef CONFIG_MMC_DEBUG |
1431 | mmc_claim_host(host); | |
1432 | BUG_ON(host->removed); | |
1433 | mmc_release_host(host); | |
1434 | #endif | |
1435 | ||
c4028958 | 1436 | mmc_schedule_delayed_work(&host->detect, delay); |
1da177e4 LT |
1437 | } |
1438 | ||
1439 | EXPORT_SYMBOL(mmc_detect_change); | |
1440 | ||
1441 | ||
c4028958 | 1442 | static void mmc_rescan(struct work_struct *work) |
1da177e4 | 1443 | { |
c4028958 DH |
1444 | struct mmc_host *host = |
1445 | container_of(work, struct mmc_host, detect.work); | |
1da177e4 LT |
1446 | |
1447 | mmc_claim_host(host); | |
1448 | ||
25a122fd | 1449 | /* |
b855885e | 1450 | * Check for removed card and newly inserted ones. We check for |
25a122fd TT |
1451 | * removed cards first so we can intelligently re-select the VDD. |
1452 | */ | |
b855885e PO |
1453 | if (host->card) { |
1454 | mmc_check_card(host->card); | |
1da177e4 | 1455 | |
b855885e | 1456 | mmc_release_host(host); |
1da177e4 | 1457 | |
b855885e PO |
1458 | if (mmc_card_dead(host->card)) { |
1459 | mmc_remove_card(host->card); | |
1460 | host->card = NULL; | |
1461 | } | |
1462 | ||
1463 | goto out; | |
1464 | } | |
25a122fd | 1465 | |
b855885e PO |
1466 | mmc_setup(host); |
1467 | ||
1468 | if (host->card && !mmc_card_dead(host->card)) { | |
1da177e4 LT |
1469 | /* |
1470 | * (Re-)calculate the fastest clock rate which the | |
1471 | * attached cards and the host support. | |
1472 | */ | |
1473 | host->ios.clock = mmc_calculate_clock(host); | |
920e70c5 | 1474 | mmc_set_ios(host); |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | mmc_release_host(host); | |
1478 | ||
b855885e PO |
1479 | /* |
1480 | * If this is a new and good card, register it. | |
1481 | */ | |
1482 | if (host->card && !mmc_card_dead(host->card)) { | |
1483 | if (mmc_register_card(host->card)) | |
1484 | mmc_card_set_dead(host->card); | |
1485 | } | |
1da177e4 | 1486 | |
b855885e PO |
1487 | /* |
1488 | * If this card is dead, destroy it. | |
1489 | */ | |
1490 | if (host->card && mmc_card_dead(host->card)) { | |
1491 | mmc_remove_card(host->card); | |
1492 | host->card = NULL; | |
1da177e4 LT |
1493 | } |
1494 | ||
b855885e | 1495 | out: |
1da177e4 LT |
1496 | /* |
1497 | * If we discover that there are no cards on the | |
1498 | * bus, turn off the clock and power down. | |
1499 | */ | |
b855885e | 1500 | if (!host->card) |
1da177e4 LT |
1501 | mmc_power_off(host); |
1502 | } | |
1503 | ||
1504 | ||
1505 | /** | |
1506 | * mmc_alloc_host - initialise the per-host structure. | |
1507 | * @extra: sizeof private data structure | |
1508 | * @dev: pointer to host device model structure | |
1509 | * | |
1510 | * Initialise the per-host structure. | |
1511 | */ | |
1512 | struct mmc_host *mmc_alloc_host(int extra, struct device *dev) | |
1513 | { | |
1514 | struct mmc_host *host; | |
1515 | ||
00b137cf | 1516 | host = mmc_alloc_host_sysfs(extra, dev); |
1da177e4 | 1517 | if (host) { |
1da177e4 LT |
1518 | spin_lock_init(&host->lock); |
1519 | init_waitqueue_head(&host->wq); | |
c4028958 | 1520 | INIT_DELAYED_WORK(&host->detect, mmc_rescan); |
1da177e4 | 1521 | |
1da177e4 LT |
1522 | /* |
1523 | * By default, hosts do not support SGIO or large requests. | |
1524 | * They have to set these according to their abilities. | |
1525 | */ | |
1526 | host->max_hw_segs = 1; | |
1527 | host->max_phys_segs = 1; | |
1da177e4 | 1528 | host->max_seg_size = PAGE_CACHE_SIZE; |
fe4a3c7a | 1529 | |
55db890a | 1530 | host->max_req_size = PAGE_CACHE_SIZE; |
fe4a3c7a | 1531 | host->max_blk_size = 512; |
55db890a | 1532 | host->max_blk_count = PAGE_CACHE_SIZE / 512; |
1da177e4 LT |
1533 | } |
1534 | ||
1535 | return host; | |
1536 | } | |
1537 | ||
1538 | EXPORT_SYMBOL(mmc_alloc_host); | |
1539 | ||
1540 | /** | |
1541 | * mmc_add_host - initialise host hardware | |
1542 | * @host: mmc host | |
1543 | */ | |
1544 | int mmc_add_host(struct mmc_host *host) | |
1545 | { | |
00b137cf | 1546 | int ret; |
1da177e4 | 1547 | |
00b137cf RK |
1548 | ret = mmc_add_host_sysfs(host); |
1549 | if (ret == 0) { | |
1550 | mmc_power_off(host); | |
8dc00335 | 1551 | mmc_detect_change(host, 0); |
00b137cf | 1552 | } |
1da177e4 | 1553 | |
00b137cf | 1554 | return ret; |
1da177e4 LT |
1555 | } |
1556 | ||
1557 | EXPORT_SYMBOL(mmc_add_host); | |
1558 | ||
1559 | /** | |
1560 | * mmc_remove_host - remove host hardware | |
1561 | * @host: mmc host | |
1562 | * | |
1563 | * Unregister and remove all cards associated with this host, | |
1564 | * and power down the MMC bus. | |
1565 | */ | |
1566 | void mmc_remove_host(struct mmc_host *host) | |
1567 | { | |
3b91e550 PO |
1568 | #ifdef CONFIG_MMC_DEBUG |
1569 | mmc_claim_host(host); | |
1570 | host->removed = 1; | |
1571 | mmc_release_host(host); | |
1572 | #endif | |
1573 | ||
1574 | mmc_flush_scheduled_work(); | |
1575 | ||
b855885e PO |
1576 | if (host->card) { |
1577 | mmc_remove_card(host->card); | |
1578 | host->card = NULL; | |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | mmc_power_off(host); | |
00b137cf | 1582 | mmc_remove_host_sysfs(host); |
1da177e4 LT |
1583 | } |
1584 | ||
1585 | EXPORT_SYMBOL(mmc_remove_host); | |
1586 | ||
1587 | /** | |
1588 | * mmc_free_host - free the host structure | |
1589 | * @host: mmc host | |
1590 | * | |
1591 | * Free the host once all references to it have been dropped. | |
1592 | */ | |
1593 | void mmc_free_host(struct mmc_host *host) | |
1594 | { | |
00b137cf | 1595 | mmc_free_host_sysfs(host); |
1da177e4 LT |
1596 | } |
1597 | ||
1598 | EXPORT_SYMBOL(mmc_free_host); | |
1599 | ||
1600 | #ifdef CONFIG_PM | |
1601 | ||
1602 | /** | |
1603 | * mmc_suspend_host - suspend a host | |
1604 | * @host: mmc host | |
1605 | * @state: suspend mode (PM_SUSPEND_xxx) | |
1606 | */ | |
e5378ca8 | 1607 | int mmc_suspend_host(struct mmc_host *host, pm_message_t state) |
1da177e4 | 1608 | { |
b5af25be PO |
1609 | mmc_flush_scheduled_work(); |
1610 | ||
b855885e PO |
1611 | if (host->card) { |
1612 | mmc_remove_card(host->card); | |
1613 | host->card = NULL; | |
b5af25be PO |
1614 | } |
1615 | ||
1da177e4 | 1616 | mmc_power_off(host); |
1da177e4 LT |
1617 | |
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | EXPORT_SYMBOL(mmc_suspend_host); | |
1622 | ||
1623 | /** | |
1624 | * mmc_resume_host - resume a previously suspended host | |
1625 | * @host: mmc host | |
1626 | */ | |
1627 | int mmc_resume_host(struct mmc_host *host) | |
1628 | { | |
c4028958 | 1629 | mmc_rescan(&host->detect.work); |
1da177e4 LT |
1630 | |
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | EXPORT_SYMBOL(mmc_resume_host); | |
1635 | ||
1636 | #endif | |
1637 | ||
1638 | MODULE_LICENSE("GPL"); |