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. |
ad3868b2 | 6 | * Copyright (C) 2005-2008 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> | |
af8350c7 | 21 | #include <linux/leds.h> |
b57c43ad | 22 | #include <linux/scatterlist.h> |
86e8286a | 23 | #include <linux/log2.h> |
5c13941a | 24 | #include <linux/regulator/consumer.h> |
e594573d | 25 | #include <linux/pm_runtime.h> |
bbd43682 | 26 | #include <linux/pm_wakeup.h> |
35eb6db1 | 27 | #include <linux/suspend.h> |
1b676f70 PF |
28 | #include <linux/fault-inject.h> |
29 | #include <linux/random.h> | |
950d56ac | 30 | #include <linux/slab.h> |
6e9e318b | 31 | #include <linux/of.h> |
1da177e4 LT |
32 | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/host.h> | |
da7fbe58 PO |
35 | #include <linux/mmc/mmc.h> |
36 | #include <linux/mmc/sd.h> | |
740a221e | 37 | #include <linux/mmc/slot-gpio.h> |
1da177e4 | 38 | |
aaac1b47 | 39 | #include "core.h" |
ffce2e7e PO |
40 | #include "bus.h" |
41 | #include "host.h" | |
e29a7d73 | 42 | #include "sdio_bus.h" |
3aa8793f | 43 | #include "pwrseq.h" |
da7fbe58 PO |
44 | |
45 | #include "mmc_ops.h" | |
46 | #include "sd_ops.h" | |
5c4e6f13 | 47 | #include "sdio_ops.h" |
1da177e4 | 48 | |
8fee476b TR |
49 | /* If the device is not responding */ |
50 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ | |
51 | ||
950d56ac JC |
52 | /* |
53 | * Background operations can take a long time, depending on the housekeeping | |
54 | * operations the card has to perform. | |
55 | */ | |
56 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ | |
57 | ||
ffce2e7e | 58 | static struct workqueue_struct *workqueue; |
fa550189 | 59 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 60 | |
af517150 DB |
61 | /* |
62 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
63 | * performance cost, and for other reasons may not always be desired. | |
64 | * So we allow it it to be disabled. | |
65 | */ | |
90ab5ee9 | 66 | bool use_spi_crc = 1; |
af517150 DB |
67 | module_param(use_spi_crc, bool, 0); |
68 | ||
ffce2e7e PO |
69 | /* |
70 | * Internal function. Schedule delayed work in the MMC work queue. | |
71 | */ | |
72 | static int mmc_schedule_delayed_work(struct delayed_work *work, | |
73 | unsigned long delay) | |
74 | { | |
75 | return queue_delayed_work(workqueue, work, delay); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Internal function. Flush all scheduled work from the MMC work queue. | |
80 | */ | |
81 | static void mmc_flush_scheduled_work(void) | |
82 | { | |
83 | flush_workqueue(workqueue); | |
84 | } | |
85 | ||
1b676f70 PF |
86 | #ifdef CONFIG_FAIL_MMC_REQUEST |
87 | ||
88 | /* | |
89 | * Internal function. Inject random data errors. | |
90 | * If mmc_data is NULL no errors are injected. | |
91 | */ | |
92 | static void mmc_should_fail_request(struct mmc_host *host, | |
93 | struct mmc_request *mrq) | |
94 | { | |
95 | struct mmc_command *cmd = mrq->cmd; | |
96 | struct mmc_data *data = mrq->data; | |
97 | static const int data_errors[] = { | |
98 | -ETIMEDOUT, | |
99 | -EILSEQ, | |
100 | -EIO, | |
101 | }; | |
102 | ||
103 | if (!data) | |
104 | return; | |
105 | ||
106 | if (cmd->error || data->error || | |
107 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) | |
108 | return; | |
109 | ||
2e744fcb AM |
110 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
111 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
112 | } |
113 | ||
114 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
115 | ||
116 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
117 | struct mmc_request *mrq) | |
118 | { | |
119 | } | |
120 | ||
121 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
122 | ||
1da177e4 | 123 | /** |
fe10c6ab RK |
124 | * mmc_request_done - finish processing an MMC request |
125 | * @host: MMC host which completed request | |
126 | * @mrq: MMC request which request | |
1da177e4 LT |
127 | * |
128 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 129 | * their processing of a request. |
1da177e4 LT |
130 | */ |
131 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
132 | { | |
133 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
134 | int err = cmd->error; |
135 | ||
af517150 DB |
136 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
137 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
138 | cmd->retries = 0; | |
139 | } | |
140 | ||
d3049504 | 141 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
08a7e1df AH |
142 | /* |
143 | * Request starter must handle retries - see | |
144 | * mmc_wait_for_req_done(). | |
145 | */ | |
146 | if (mrq->done) | |
147 | mrq->done(mrq); | |
e4d21708 | 148 | } else { |
1b676f70 PF |
149 | mmc_should_fail_request(host, mrq); |
150 | ||
af8350c7 PO |
151 | led_trigger_event(host->led, LED_OFF); |
152 | ||
fc75b708 AG |
153 | if (mrq->sbc) { |
154 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
155 | mmc_hostname(host), mrq->sbc->opcode, | |
156 | mrq->sbc->error, | |
157 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
158 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
159 | } | |
160 | ||
e4d21708 PO |
161 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
162 | mmc_hostname(host), cmd->opcode, err, | |
163 | cmd->resp[0], cmd->resp[1], | |
164 | cmd->resp[2], cmd->resp[3]); | |
165 | ||
166 | if (mrq->data) { | |
167 | pr_debug("%s: %d bytes transferred: %d\n", | |
168 | mmc_hostname(host), | |
169 | mrq->data->bytes_xfered, mrq->data->error); | |
170 | } | |
171 | ||
172 | if (mrq->stop) { | |
173 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
174 | mmc_hostname(host), mrq->stop->opcode, | |
175 | mrq->stop->error, | |
176 | mrq->stop->resp[0], mrq->stop->resp[1], | |
177 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
178 | } | |
179 | ||
180 | if (mrq->done) | |
181 | mrq->done(mrq); | |
04566831 | 182 | |
08c14071 | 183 | mmc_host_clk_release(host); |
1da177e4 LT |
184 | } |
185 | } | |
186 | ||
187 | EXPORT_SYMBOL(mmc_request_done); | |
188 | ||
90a81489 AH |
189 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
190 | { | |
191 | int err; | |
192 | ||
193 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
194 | err = mmc_retune(host); | |
195 | if (err) { | |
196 | mrq->cmd->error = err; | |
197 | mmc_request_done(host, mrq); | |
198 | return; | |
199 | } | |
200 | ||
201 | host->ops->request(host, mrq); | |
202 | } | |
203 | ||
f100c1c2 | 204 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
1da177e4 | 205 | { |
976d9276 PO |
206 | #ifdef CONFIG_MMC_DEBUG |
207 | unsigned int i, sz; | |
a84756c5 | 208 | struct scatterlist *sg; |
976d9276 | 209 | #endif |
90a81489 AH |
210 | mmc_retune_hold(host); |
211 | ||
f100c1c2 AH |
212 | if (mmc_card_removed(host->card)) |
213 | return -ENOMEDIUM; | |
976d9276 | 214 | |
7b2fd4f2 JC |
215 | if (mrq->sbc) { |
216 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
217 | mmc_hostname(host), mrq->sbc->opcode, | |
218 | mrq->sbc->arg, mrq->sbc->flags); | |
219 | } | |
220 | ||
920e70c5 RK |
221 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
222 | mmc_hostname(host), mrq->cmd->opcode, | |
223 | mrq->cmd->arg, mrq->cmd->flags); | |
1da177e4 | 224 | |
e4d21708 PO |
225 | if (mrq->data) { |
226 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
227 | "tsac %d ms nsac %d\n", | |
228 | mmc_hostname(host), mrq->data->blksz, | |
229 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 230 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
231 | mrq->data->timeout_clks); |
232 | } | |
233 | ||
234 | if (mrq->stop) { | |
235 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
236 | mmc_hostname(host), mrq->stop->opcode, | |
237 | mrq->stop->arg, mrq->stop->flags); | |
238 | } | |
239 | ||
f22ee4ed | 240 | WARN_ON(!host->claimed); |
1da177e4 LT |
241 | |
242 | mrq->cmd->error = 0; | |
243 | mrq->cmd->mrq = mrq; | |
cce411e6 AG |
244 | if (mrq->sbc) { |
245 | mrq->sbc->error = 0; | |
246 | mrq->sbc->mrq = mrq; | |
247 | } | |
1da177e4 | 248 | if (mrq->data) { |
fe4a3c7a | 249 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
55db890a PO |
250 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
251 | BUG_ON(mrq->data->blocks * mrq->data->blksz > | |
252 | host->max_req_size); | |
fe4a3c7a | 253 | |
976d9276 PO |
254 | #ifdef CONFIG_MMC_DEBUG |
255 | sz = 0; | |
a84756c5 PO |
256 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
257 | sz += sg->length; | |
976d9276 PO |
258 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
259 | #endif | |
260 | ||
1da177e4 LT |
261 | mrq->cmd->data = mrq->data; |
262 | mrq->data->error = 0; | |
263 | mrq->data->mrq = mrq; | |
264 | if (mrq->stop) { | |
265 | mrq->data->stop = mrq->stop; | |
266 | mrq->stop->error = 0; | |
267 | mrq->stop->mrq = mrq; | |
268 | } | |
269 | } | |
08c14071 | 270 | mmc_host_clk_hold(host); |
66c036e0 | 271 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 272 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
273 | |
274 | return 0; | |
1da177e4 LT |
275 | } |
276 | ||
950d56ac JC |
277 | /** |
278 | * mmc_start_bkops - start BKOPS for supported cards | |
279 | * @card: MMC card to start BKOPS | |
280 | * @form_exception: A flag to indicate if this function was | |
281 | * called due to an exception raised by the card | |
282 | * | |
283 | * Start background operations whenever requested. | |
284 | * When the urgent BKOPS bit is set in a R1 command response | |
285 | * then background operations should be started immediately. | |
286 | */ | |
287 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) | |
288 | { | |
289 | int err; | |
290 | int timeout; | |
291 | bool use_busy_signal; | |
292 | ||
293 | BUG_ON(!card); | |
294 | ||
0501be64 | 295 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
950d56ac JC |
296 | return; |
297 | ||
298 | err = mmc_read_bkops_status(card); | |
299 | if (err) { | |
300 | pr_err("%s: Failed to read bkops status: %d\n", | |
301 | mmc_hostname(card->host), err); | |
302 | return; | |
303 | } | |
304 | ||
305 | if (!card->ext_csd.raw_bkops_status) | |
306 | return; | |
307 | ||
308 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && | |
309 | from_exception) | |
310 | return; | |
311 | ||
312 | mmc_claim_host(card->host); | |
313 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { | |
314 | timeout = MMC_BKOPS_MAX_TIMEOUT; | |
315 | use_busy_signal = true; | |
316 | } else { | |
317 | timeout = 0; | |
318 | use_busy_signal = false; | |
319 | } | |
320 | ||
321 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
4509f847 UH |
322 | EXT_CSD_BKOPS_START, 1, timeout, |
323 | use_busy_signal, true, false); | |
950d56ac JC |
324 | if (err) { |
325 | pr_warn("%s: Error %d starting bkops\n", | |
326 | mmc_hostname(card->host), err); | |
327 | goto out; | |
328 | } | |
329 | ||
330 | /* | |
331 | * For urgent bkops status (LEVEL_2 and more) | |
332 | * bkops executed synchronously, otherwise | |
333 | * the operation is in progress | |
334 | */ | |
335 | if (!use_busy_signal) | |
336 | mmc_card_set_doing_bkops(card); | |
337 | out: | |
338 | mmc_release_host(card->host); | |
339 | } | |
340 | EXPORT_SYMBOL(mmc_start_bkops); | |
341 | ||
2220eedf KD |
342 | /* |
343 | * mmc_wait_data_done() - done callback for data request | |
344 | * @mrq: done data request | |
345 | * | |
346 | * Wakes up mmc context, passed as a callback to host controller driver | |
347 | */ | |
348 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
349 | { | |
350 | mrq->host->context_info.is_done_rcv = true; | |
351 | wake_up_interruptible(&mrq->host->context_info.wait); | |
352 | } | |
353 | ||
1da177e4 LT |
354 | static void mmc_wait_done(struct mmc_request *mrq) |
355 | { | |
aa8b683a PF |
356 | complete(&mrq->completion); |
357 | } | |
358 | ||
2220eedf KD |
359 | /* |
360 | *__mmc_start_data_req() - starts data request | |
361 | * @host: MMC host to start the request | |
362 | * @mrq: data request to start | |
363 | * | |
364 | * Sets the done callback to be called when request is completed by the card. | |
365 | * Starts data mmc request execution | |
366 | */ | |
367 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
368 | { | |
f100c1c2 AH |
369 | int err; |
370 | ||
2220eedf KD |
371 | mrq->done = mmc_wait_data_done; |
372 | mrq->host = host; | |
f100c1c2 AH |
373 | |
374 | err = mmc_start_request(host, mrq); | |
375 | if (err) { | |
376 | mrq->cmd->error = err; | |
9b844961 | 377 | mmc_wait_data_done(mrq); |
2220eedf | 378 | } |
2220eedf | 379 | |
f100c1c2 | 380 | return err; |
2220eedf KD |
381 | } |
382 | ||
956d9fd5 | 383 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 384 | { |
f100c1c2 AH |
385 | int err; |
386 | ||
aa8b683a PF |
387 | init_completion(&mrq->completion); |
388 | mrq->done = mmc_wait_done; | |
f100c1c2 AH |
389 | |
390 | err = mmc_start_request(host, mrq); | |
391 | if (err) { | |
392 | mrq->cmd->error = err; | |
d3049504 | 393 | complete(&mrq->completion); |
d3049504 | 394 | } |
f100c1c2 AH |
395 | |
396 | return err; | |
aa8b683a PF |
397 | } |
398 | ||
2220eedf KD |
399 | /* |
400 | * mmc_wait_for_data_req_done() - wait for request completed | |
401 | * @host: MMC host to prepare the command. | |
402 | * @mrq: MMC request to wait for | |
403 | * | |
404 | * Blocks MMC context till host controller will ack end of data request | |
405 | * execution or new request notification arrives from the block layer. | |
406 | * Handles command retries. | |
407 | * | |
408 | * Returns enum mmc_blk_status after checking errors. | |
409 | */ | |
410 | static int mmc_wait_for_data_req_done(struct mmc_host *host, | |
411 | struct mmc_request *mrq, | |
412 | struct mmc_async_req *next_req) | |
413 | { | |
414 | struct mmc_command *cmd; | |
415 | struct mmc_context_info *context_info = &host->context_info; | |
416 | int err; | |
417 | unsigned long flags; | |
418 | ||
419 | while (1) { | |
420 | wait_event_interruptible(context_info->wait, | |
421 | (context_info->is_done_rcv || | |
422 | context_info->is_new_req)); | |
423 | spin_lock_irqsave(&context_info->lock, flags); | |
424 | context_info->is_waiting_last_req = false; | |
425 | spin_unlock_irqrestore(&context_info->lock, flags); | |
426 | if (context_info->is_done_rcv) { | |
427 | context_info->is_done_rcv = false; | |
428 | context_info->is_new_req = false; | |
429 | cmd = mrq->cmd; | |
775a9362 | 430 | |
2220eedf KD |
431 | if (!cmd->error || !cmd->retries || |
432 | mmc_card_removed(host->card)) { | |
433 | err = host->areq->err_check(host->card, | |
434 | host->areq); | |
435 | break; /* return err */ | |
436 | } else { | |
90a81489 | 437 | mmc_retune_recheck(host); |
2220eedf KD |
438 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
439 | mmc_hostname(host), | |
440 | cmd->opcode, cmd->error); | |
441 | cmd->retries--; | |
442 | cmd->error = 0; | |
90a81489 | 443 | __mmc_start_request(host, mrq); |
2220eedf KD |
444 | continue; /* wait for done/new event again */ |
445 | } | |
446 | } else if (context_info->is_new_req) { | |
447 | context_info->is_new_req = false; | |
90a81489 AH |
448 | if (!next_req) |
449 | return MMC_BLK_NEW_REQUEST; | |
2220eedf KD |
450 | } |
451 | } | |
90a81489 | 452 | mmc_retune_release(host); |
2220eedf KD |
453 | return err; |
454 | } | |
455 | ||
aa8b683a PF |
456 | static void mmc_wait_for_req_done(struct mmc_host *host, |
457 | struct mmc_request *mrq) | |
458 | { | |
08a7e1df AH |
459 | struct mmc_command *cmd; |
460 | ||
461 | while (1) { | |
462 | wait_for_completion(&mrq->completion); | |
463 | ||
464 | cmd = mrq->cmd; | |
775a9362 ME |
465 | |
466 | /* | |
467 | * If host has timed out waiting for the sanitize | |
468 | * to complete, card might be still in programming state | |
469 | * so let's try to bring the card out of programming | |
470 | * state. | |
471 | */ | |
472 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
473 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
474 | pr_warn("%s: %s: Interrupted sanitize\n", |
475 | mmc_hostname(host), __func__); | |
775a9362 ME |
476 | cmd->error = 0; |
477 | break; | |
478 | } else { | |
479 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
480 | mmc_hostname(host), __func__); | |
481 | } | |
482 | } | |
d3049504 AH |
483 | if (!cmd->error || !cmd->retries || |
484 | mmc_card_removed(host->card)) | |
08a7e1df AH |
485 | break; |
486 | ||
90a81489 AH |
487 | mmc_retune_recheck(host); |
488 | ||
08a7e1df AH |
489 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
490 | mmc_hostname(host), cmd->opcode, cmd->error); | |
491 | cmd->retries--; | |
492 | cmd->error = 0; | |
90a81489 | 493 | __mmc_start_request(host, mrq); |
08a7e1df | 494 | } |
90a81489 AH |
495 | |
496 | mmc_retune_release(host); | |
aa8b683a PF |
497 | } |
498 | ||
499 | /** | |
500 | * mmc_pre_req - Prepare for a new request | |
501 | * @host: MMC host to prepare command | |
502 | * @mrq: MMC request to prepare for | |
503 | * @is_first_req: true if there is no previous started request | |
504 | * that may run in parellel to this call, otherwise false | |
505 | * | |
506 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
507 | * host prepare for the new request. Preparation of a request may be | |
508 | * performed while another request is running on the host. | |
509 | */ | |
510 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, | |
511 | bool is_first_req) | |
512 | { | |
2c4967f7 SRT |
513 | if (host->ops->pre_req) { |
514 | mmc_host_clk_hold(host); | |
aa8b683a | 515 | host->ops->pre_req(host, mrq, is_first_req); |
2c4967f7 SRT |
516 | mmc_host_clk_release(host); |
517 | } | |
aa8b683a PF |
518 | } |
519 | ||
520 | /** | |
521 | * mmc_post_req - Post process a completed request | |
522 | * @host: MMC host to post process command | |
523 | * @mrq: MMC request to post process for | |
524 | * @err: Error, if non zero, clean up any resources made in pre_req | |
525 | * | |
526 | * Let the host post process a completed request. Post processing of | |
527 | * a request may be performed while another reuqest is running. | |
528 | */ | |
529 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
530 | int err) | |
531 | { | |
2c4967f7 SRT |
532 | if (host->ops->post_req) { |
533 | mmc_host_clk_hold(host); | |
aa8b683a | 534 | host->ops->post_req(host, mrq, err); |
2c4967f7 SRT |
535 | mmc_host_clk_release(host); |
536 | } | |
1da177e4 LT |
537 | } |
538 | ||
aa8b683a PF |
539 | /** |
540 | * mmc_start_req - start a non-blocking request | |
541 | * @host: MMC host to start command | |
542 | * @areq: async request to start | |
543 | * @error: out parameter returns 0 for success, otherwise non zero | |
544 | * | |
545 | * Start a new MMC custom command request for a host. | |
546 | * If there is on ongoing async request wait for completion | |
547 | * of that request and start the new one and return. | |
548 | * Does not wait for the new request to complete. | |
549 | * | |
550 | * Returns the completed request, NULL in case of none completed. | |
551 | * Wait for the an ongoing request (previoulsy started) to complete and | |
552 | * return the completed request. If there is no ongoing request, NULL | |
553 | * is returned without waiting. NULL is not an error condition. | |
554 | */ | |
555 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, | |
556 | struct mmc_async_req *areq, int *error) | |
557 | { | |
558 | int err = 0; | |
956d9fd5 | 559 | int start_err = 0; |
aa8b683a PF |
560 | struct mmc_async_req *data = host->areq; |
561 | ||
562 | /* Prepare a new request */ | |
563 | if (areq) | |
564 | mmc_pre_req(host, areq->mrq, !host->areq); | |
565 | ||
566 | if (host->areq) { | |
f5c2758f JC |
567 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
568 | if (err == MMC_BLK_NEW_REQUEST) { | |
569 | if (error) | |
570 | *error = err; | |
571 | /* | |
572 | * The previous request was not completed, | |
573 | * nothing to return | |
574 | */ | |
575 | return NULL; | |
576 | } | |
950d56ac JC |
577 | /* |
578 | * Check BKOPS urgency for each R1 response | |
579 | */ | |
580 | if (host->card && mmc_card_mmc(host->card) && | |
581 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
582 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
64b12a68 SK |
583 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
584 | ||
585 | /* Cancel the prepared request */ | |
586 | if (areq) | |
587 | mmc_post_req(host, areq->mrq, -EINVAL); | |
588 | ||
950d56ac | 589 | mmc_start_bkops(host->card, true); |
64b12a68 SK |
590 | |
591 | /* prepare the request again */ | |
592 | if (areq) | |
593 | mmc_pre_req(host, areq->mrq, !host->areq); | |
594 | } | |
aa8b683a PF |
595 | } |
596 | ||
956d9fd5 | 597 | if (!err && areq) |
2220eedf | 598 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a PF |
599 | |
600 | if (host->areq) | |
601 | mmc_post_req(host, host->areq->mrq, 0); | |
602 | ||
956d9fd5 UH |
603 | /* Cancel a prepared request if it was not started. */ |
604 | if ((err || start_err) && areq) | |
f5c2758f | 605 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 UH |
606 | |
607 | if (err) | |
608 | host->areq = NULL; | |
609 | else | |
610 | host->areq = areq; | |
611 | ||
aa8b683a PF |
612 | if (error) |
613 | *error = err; | |
614 | return data; | |
615 | } | |
616 | EXPORT_SYMBOL(mmc_start_req); | |
617 | ||
67a61c48 PO |
618 | /** |
619 | * mmc_wait_for_req - start a request and wait for completion | |
620 | * @host: MMC host to start command | |
621 | * @mrq: MMC request to start | |
622 | * | |
623 | * Start a new MMC custom command request for a host, and wait | |
624 | * for the command to complete. Does not attempt to parse the | |
625 | * response. | |
626 | */ | |
627 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 628 | { |
aa8b683a PF |
629 | __mmc_start_req(host, mrq); |
630 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 631 | } |
1da177e4 LT |
632 | EXPORT_SYMBOL(mmc_wait_for_req); |
633 | ||
eb0d8f13 JC |
634 | /** |
635 | * mmc_interrupt_hpi - Issue for High priority Interrupt | |
636 | * @card: the MMC card associated with the HPI transfer | |
637 | * | |
638 | * Issued High Priority Interrupt, and check for card status | |
950d56ac | 639 | * until out-of prg-state. |
eb0d8f13 JC |
640 | */ |
641 | int mmc_interrupt_hpi(struct mmc_card *card) | |
642 | { | |
643 | int err; | |
644 | u32 status; | |
6af9e96e | 645 | unsigned long prg_wait; |
eb0d8f13 JC |
646 | |
647 | BUG_ON(!card); | |
648 | ||
649 | if (!card->ext_csd.hpi_en) { | |
650 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | mmc_claim_host(card->host); | |
655 | err = mmc_send_status(card, &status); | |
656 | if (err) { | |
657 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); | |
658 | goto out; | |
659 | } | |
660 | ||
6af9e96e V |
661 | switch (R1_CURRENT_STATE(status)) { |
662 | case R1_STATE_IDLE: | |
663 | case R1_STATE_READY: | |
664 | case R1_STATE_STBY: | |
211d4fe5 | 665 | case R1_STATE_TRAN: |
6af9e96e | 666 | /* |
211d4fe5 | 667 | * In idle and transfer states, HPI is not needed and the caller |
6af9e96e V |
668 | * can issue the next intended command immediately |
669 | */ | |
670 | goto out; | |
671 | case R1_STATE_PRG: | |
672 | break; | |
673 | default: | |
674 | /* In all other states, it's illegal to issue HPI */ | |
675 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", | |
676 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); | |
677 | err = -EINVAL; | |
678 | goto out; | |
679 | } | |
680 | ||
681 | err = mmc_send_hpi_cmd(card, &status); | |
682 | if (err) | |
683 | goto out; | |
684 | ||
685 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); | |
686 | do { | |
687 | err = mmc_send_status(card, &status); | |
688 | ||
689 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) | |
690 | break; | |
691 | if (time_after(jiffies, prg_wait)) | |
692 | err = -ETIMEDOUT; | |
693 | } while (!err); | |
eb0d8f13 JC |
694 | |
695 | out: | |
696 | mmc_release_host(card->host); | |
697 | return err; | |
698 | } | |
699 | EXPORT_SYMBOL(mmc_interrupt_hpi); | |
700 | ||
1da177e4 LT |
701 | /** |
702 | * mmc_wait_for_cmd - start a command and wait for completion | |
703 | * @host: MMC host to start command | |
704 | * @cmd: MMC command to start | |
705 | * @retries: maximum number of retries | |
706 | * | |
707 | * Start a new MMC command for a host, and wait for the command | |
708 | * to complete. Return any error that occurred while the command | |
709 | * was executing. Do not attempt to parse the response. | |
710 | */ | |
711 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
712 | { | |
ad5fd972 | 713 | struct mmc_request mrq = {NULL}; |
1da177e4 | 714 | |
d84075c8 | 715 | WARN_ON(!host->claimed); |
1da177e4 | 716 | |
1da177e4 LT |
717 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
718 | cmd->retries = retries; | |
719 | ||
720 | mrq.cmd = cmd; | |
721 | cmd->data = NULL; | |
722 | ||
723 | mmc_wait_for_req(host, &mrq); | |
724 | ||
725 | return cmd->error; | |
726 | } | |
727 | ||
728 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
729 | ||
950d56ac JC |
730 | /** |
731 | * mmc_stop_bkops - stop ongoing BKOPS | |
732 | * @card: MMC card to check BKOPS | |
733 | * | |
734 | * Send HPI command to stop ongoing background operations to | |
735 | * allow rapid servicing of foreground operations, e.g. read/ | |
736 | * writes. Wait until the card comes out of the programming state | |
737 | * to avoid errors in servicing read/write requests. | |
738 | */ | |
739 | int mmc_stop_bkops(struct mmc_card *card) | |
740 | { | |
741 | int err = 0; | |
742 | ||
743 | BUG_ON(!card); | |
744 | err = mmc_interrupt_hpi(card); | |
745 | ||
746 | /* | |
747 | * If err is EINVAL, we can't issue an HPI. | |
748 | * It should complete the BKOPS. | |
749 | */ | |
750 | if (!err || (err == -EINVAL)) { | |
751 | mmc_card_clr_doing_bkops(card); | |
752 | err = 0; | |
753 | } | |
754 | ||
755 | return err; | |
756 | } | |
757 | EXPORT_SYMBOL(mmc_stop_bkops); | |
758 | ||
759 | int mmc_read_bkops_status(struct mmc_card *card) | |
760 | { | |
761 | int err; | |
762 | u8 *ext_csd; | |
763 | ||
950d56ac | 764 | mmc_claim_host(card->host); |
b2cada73 | 765 | err = mmc_get_ext_csd(card, &ext_csd); |
950d56ac JC |
766 | mmc_release_host(card->host); |
767 | if (err) | |
b2cada73 | 768 | return err; |
950d56ac JC |
769 | |
770 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; | |
771 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; | |
950d56ac | 772 | kfree(ext_csd); |
b2cada73 | 773 | return 0; |
950d56ac JC |
774 | } |
775 | EXPORT_SYMBOL(mmc_read_bkops_status); | |
776 | ||
d773d725 RK |
777 | /** |
778 | * mmc_set_data_timeout - set the timeout for a data command | |
779 | * @data: data phase for command | |
780 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
781 | * |
782 | * Computes the data timeout parameters according to the | |
783 | * correct algorithm given the card type. | |
d773d725 | 784 | */ |
b146d26a | 785 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
786 | { |
787 | unsigned int mult; | |
788 | ||
e6f918bf PO |
789 | /* |
790 | * SDIO cards only define an upper 1 s limit on access. | |
791 | */ | |
792 | if (mmc_card_sdio(card)) { | |
793 | data->timeout_ns = 1000000000; | |
794 | data->timeout_clks = 0; | |
795 | return; | |
796 | } | |
797 | ||
d773d725 RK |
798 | /* |
799 | * SD cards use a 100 multiplier rather than 10 | |
800 | */ | |
801 | mult = mmc_card_sd(card) ? 100 : 10; | |
802 | ||
803 | /* | |
804 | * Scale up the multiplier (and therefore the timeout) by | |
805 | * the r2w factor for writes. | |
806 | */ | |
b146d26a | 807 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
808 | mult <<= card->csd.r2w_factor; |
809 | ||
810 | data->timeout_ns = card->csd.tacc_ns * mult; | |
811 | data->timeout_clks = card->csd.tacc_clks * mult; | |
812 | ||
813 | /* | |
814 | * SD cards also have an upper limit on the timeout. | |
815 | */ | |
816 | if (mmc_card_sd(card)) { | |
817 | unsigned int timeout_us, limit_us; | |
818 | ||
819 | timeout_us = data->timeout_ns / 1000; | |
e9b86841 LW |
820 | if (mmc_host_clk_rate(card->host)) |
821 | timeout_us += data->timeout_clks * 1000 / | |
822 | (mmc_host_clk_rate(card->host) / 1000); | |
d773d725 | 823 | |
b146d26a | 824 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 825 | /* |
3bdc9ba8 PW |
826 | * The MMC spec "It is strongly recommended |
827 | * for hosts to implement more than 500ms | |
828 | * timeout value even if the card indicates | |
829 | * the 250ms maximum busy length." Even the | |
830 | * previous value of 300ms is known to be | |
831 | * insufficient for some cards. | |
493890e7 | 832 | */ |
3bdc9ba8 | 833 | limit_us = 3000000; |
d773d725 RK |
834 | else |
835 | limit_us = 100000; | |
836 | ||
fba68bd2 PL |
837 | /* |
838 | * SDHC cards always use these fixed values. | |
839 | */ | |
840 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
841 | data->timeout_ns = limit_us * 1000; |
842 | data->timeout_clks = 0; | |
843 | } | |
f7bf11a3 SW |
844 | |
845 | /* assign limit value if invalid */ | |
846 | if (timeout_us == 0) | |
847 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 848 | } |
6de5fc9c SNX |
849 | |
850 | /* | |
851 | * Some cards require longer data read timeout than indicated in CSD. | |
852 | * Address this by setting the read timeout to a "reasonably high" | |
853 | * value. For the cards tested, 300ms has proven enough. If necessary, | |
854 | * this value can be increased if other problematic cards require this. | |
855 | */ | |
856 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
857 | data->timeout_ns = 300000000; | |
858 | data->timeout_clks = 0; | |
859 | } | |
860 | ||
c0c88871 WM |
861 | /* |
862 | * Some cards need very high timeouts if driven in SPI mode. | |
863 | * The worst observed timeout was 900ms after writing a | |
864 | * continuous stream of data until the internal logic | |
865 | * overflowed. | |
866 | */ | |
867 | if (mmc_host_is_spi(card->host)) { | |
868 | if (data->flags & MMC_DATA_WRITE) { | |
869 | if (data->timeout_ns < 1000000000) | |
870 | data->timeout_ns = 1000000000; /* 1s */ | |
871 | } else { | |
872 | if (data->timeout_ns < 100000000) | |
873 | data->timeout_ns = 100000000; /* 100ms */ | |
874 | } | |
875 | } | |
d773d725 RK |
876 | } |
877 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
878 | ||
ad3868b2 PO |
879 | /** |
880 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
881 | * @card: the MMC card associated with the data transfer | |
882 | * @sz: original transfer size | |
883 | * | |
884 | * Pads the original data size with a number of extra bytes in | |
885 | * order to avoid controller bugs and/or performance hits | |
886 | * (e.g. some controllers revert to PIO for certain sizes). | |
887 | * | |
888 | * Returns the improved size, which might be unmodified. | |
889 | * | |
890 | * Note that this function is only relevant when issuing a | |
891 | * single scatter gather entry. | |
892 | */ | |
893 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
894 | { | |
895 | /* | |
896 | * FIXME: We don't have a system for the controller to tell | |
897 | * the core about its problems yet, so for now we just 32-bit | |
898 | * align the size. | |
899 | */ | |
900 | sz = ((sz + 3) / 4) * 4; | |
901 | ||
902 | return sz; | |
903 | } | |
904 | EXPORT_SYMBOL(mmc_align_data_size); | |
905 | ||
1da177e4 | 906 | /** |
2342f332 | 907 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 908 | * @host: mmc host to claim |
2342f332 | 909 | * @abort: whether or not the operation should be aborted |
1da177e4 | 910 | * |
2342f332 NP |
911 | * Claim a host for a set of operations. If @abort is non null and |
912 | * dereference a non-zero value then this will return prematurely with | |
913 | * that non-zero value without acquiring the lock. Returns zero | |
914 | * with the lock held otherwise. | |
1da177e4 | 915 | */ |
2342f332 | 916 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
917 | { |
918 | DECLARE_WAITQUEUE(wait, current); | |
919 | unsigned long flags; | |
2342f332 | 920 | int stop; |
9250aea7 | 921 | bool pm = false; |
1da177e4 | 922 | |
cf795bfb PO |
923 | might_sleep(); |
924 | ||
1da177e4 LT |
925 | add_wait_queue(&host->wq, &wait); |
926 | spin_lock_irqsave(&host->lock, flags); | |
927 | while (1) { | |
928 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 929 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 930 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
931 | break; |
932 | spin_unlock_irqrestore(&host->lock, flags); | |
933 | schedule(); | |
934 | spin_lock_irqsave(&host->lock, flags); | |
935 | } | |
936 | set_current_state(TASK_RUNNING); | |
319a3f14 | 937 | if (!stop) { |
2342f332 | 938 | host->claimed = 1; |
319a3f14 AH |
939 | host->claimer = current; |
940 | host->claim_cnt += 1; | |
9250aea7 UH |
941 | if (host->claim_cnt == 1) |
942 | pm = true; | |
319a3f14 | 943 | } else |
2342f332 | 944 | wake_up(&host->wq); |
1da177e4 LT |
945 | spin_unlock_irqrestore(&host->lock, flags); |
946 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
947 | |
948 | if (pm) | |
949 | pm_runtime_get_sync(mmc_dev(host)); | |
950 | ||
2342f332 | 951 | return stop; |
1da177e4 | 952 | } |
2342f332 | 953 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 954 | |
ab1efd27 | 955 | /** |
907d2e7c | 956 | * mmc_release_host - release a host |
ab1efd27 UH |
957 | * @host: mmc host to release |
958 | * | |
907d2e7c AH |
959 | * Release a MMC host, allowing others to claim the host |
960 | * for their operations. | |
ab1efd27 | 961 | */ |
907d2e7c | 962 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
963 | { |
964 | unsigned long flags; | |
965 | ||
907d2e7c AH |
966 | WARN_ON(!host->claimed); |
967 | ||
8ea926b2 | 968 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
969 | if (--host->claim_cnt) { |
970 | /* Release for nested claim */ | |
971 | spin_unlock_irqrestore(&host->lock, flags); | |
972 | } else { | |
973 | host->claimed = 0; | |
974 | host->claimer = NULL; | |
975 | spin_unlock_irqrestore(&host->lock, flags); | |
976 | wake_up(&host->wq); | |
9250aea7 UH |
977 | pm_runtime_mark_last_busy(mmc_dev(host)); |
978 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 979 | } |
8ea926b2 | 980 | } |
1da177e4 LT |
981 | EXPORT_SYMBOL(mmc_release_host); |
982 | ||
e94cfef6 UH |
983 | /* |
984 | * This is a helper function, which fetches a runtime pm reference for the | |
985 | * card device and also claims the host. | |
986 | */ | |
987 | void mmc_get_card(struct mmc_card *card) | |
988 | { | |
989 | pm_runtime_get_sync(&card->dev); | |
990 | mmc_claim_host(card->host); | |
991 | } | |
992 | EXPORT_SYMBOL(mmc_get_card); | |
993 | ||
994 | /* | |
995 | * This is a helper function, which releases the host and drops the runtime | |
996 | * pm reference for the card device. | |
997 | */ | |
998 | void mmc_put_card(struct mmc_card *card) | |
999 | { | |
1000 | mmc_release_host(card->host); | |
1001 | pm_runtime_mark_last_busy(&card->dev); | |
1002 | pm_runtime_put_autosuspend(&card->dev); | |
1003 | } | |
1004 | EXPORT_SYMBOL(mmc_put_card); | |
1005 | ||
7ea239d9 PO |
1006 | /* |
1007 | * Internal function that does the actual ios call to the host driver, | |
1008 | * optionally printing some debug output. | |
1009 | */ | |
920e70c5 RK |
1010 | static inline void mmc_set_ios(struct mmc_host *host) |
1011 | { | |
1012 | struct mmc_ios *ios = &host->ios; | |
1013 | ||
cd9277c0 PO |
1014 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
1015 | "width %u timing %u\n", | |
920e70c5 RK |
1016 | mmc_hostname(host), ios->clock, ios->bus_mode, |
1017 | ios->power_mode, ios->chip_select, ios->vdd, | |
cd9277c0 | 1018 | ios->bus_width, ios->timing); |
fba68bd2 | 1019 | |
04566831 LW |
1020 | if (ios->clock > 0) |
1021 | mmc_set_ungated(host); | |
920e70c5 RK |
1022 | host->ops->set_ios(host, ios); |
1023 | } | |
1024 | ||
7ea239d9 PO |
1025 | /* |
1026 | * Control chip select pin on a host. | |
1027 | */ | |
da7fbe58 | 1028 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 1029 | { |
778e277c | 1030 | mmc_host_clk_hold(host); |
da7fbe58 PO |
1031 | host->ios.chip_select = mode; |
1032 | mmc_set_ios(host); | |
778e277c | 1033 | mmc_host_clk_release(host); |
1da177e4 LT |
1034 | } |
1035 | ||
7ea239d9 PO |
1036 | /* |
1037 | * Sets the host clock to the highest possible frequency that | |
1038 | * is below "hz". | |
1039 | */ | |
778e277c | 1040 | static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 1041 | { |
6a98f1e8 | 1042 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
1043 | |
1044 | if (hz > host->f_max) | |
1045 | hz = host->f_max; | |
1046 | ||
1047 | host->ios.clock = hz; | |
1048 | mmc_set_ios(host); | |
1049 | } | |
1050 | ||
778e277c MW |
1051 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
1052 | { | |
1053 | mmc_host_clk_hold(host); | |
1054 | __mmc_set_clock(host, hz); | |
1055 | mmc_host_clk_release(host); | |
1056 | } | |
1057 | ||
04566831 LW |
1058 | #ifdef CONFIG_MMC_CLKGATE |
1059 | /* | |
1060 | * This gates the clock by setting it to 0 Hz. | |
1061 | */ | |
1062 | void mmc_gate_clock(struct mmc_host *host) | |
1063 | { | |
1064 | unsigned long flags; | |
1065 | ||
1066 | spin_lock_irqsave(&host->clk_lock, flags); | |
1067 | host->clk_old = host->ios.clock; | |
1068 | host->ios.clock = 0; | |
1069 | host->clk_gated = true; | |
1070 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1071 | mmc_set_ios(host); | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * This restores the clock from gating by using the cached | |
1076 | * clock value. | |
1077 | */ | |
1078 | void mmc_ungate_clock(struct mmc_host *host) | |
1079 | { | |
1080 | /* | |
1081 | * We should previously have gated the clock, so the clock shall | |
1082 | * be 0 here! The clock may however be 0 during initialization, | |
1083 | * when some request operations are performed before setting | |
1084 | * the frequency. When ungate is requested in that situation | |
1085 | * we just ignore the call. | |
1086 | */ | |
1087 | if (host->clk_old) { | |
1088 | BUG_ON(host->ios.clock); | |
1089 | /* This call will also set host->clk_gated to false */ | |
778e277c | 1090 | __mmc_set_clock(host, host->clk_old); |
04566831 LW |
1091 | } |
1092 | } | |
1093 | ||
1094 | void mmc_set_ungated(struct mmc_host *host) | |
1095 | { | |
1096 | unsigned long flags; | |
1097 | ||
1098 | /* | |
1099 | * We've been given a new frequency while the clock is gated, | |
1100 | * so make sure we regard this as ungating it. | |
1101 | */ | |
1102 | spin_lock_irqsave(&host->clk_lock, flags); | |
1103 | host->clk_gated = false; | |
1104 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1105 | } | |
1106 | ||
1107 | #else | |
1108 | void mmc_set_ungated(struct mmc_host *host) | |
1109 | { | |
1110 | } | |
1111 | #endif | |
1112 | ||
63e415c6 AH |
1113 | int mmc_execute_tuning(struct mmc_card *card) |
1114 | { | |
1115 | struct mmc_host *host = card->host; | |
1116 | u32 opcode; | |
1117 | int err; | |
1118 | ||
1119 | if (!host->ops->execute_tuning) | |
1120 | return 0; | |
1121 | ||
1122 | if (mmc_card_mmc(card)) | |
1123 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
1124 | else | |
1125 | opcode = MMC_SEND_TUNING_BLOCK; | |
1126 | ||
1127 | mmc_host_clk_hold(host); | |
1128 | err = host->ops->execute_tuning(host, opcode); | |
1129 | mmc_host_clk_release(host); | |
1130 | ||
1131 | if (err) | |
1132 | pr_err("%s: tuning execution failed\n", mmc_hostname(host)); | |
79d5a65a AH |
1133 | else |
1134 | mmc_retune_enable(host); | |
63e415c6 AH |
1135 | |
1136 | return err; | |
1137 | } | |
1138 | ||
7ea239d9 PO |
1139 | /* |
1140 | * Change the bus mode (open drain/push-pull) of a host. | |
1141 | */ | |
1142 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1143 | { | |
778e277c | 1144 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1145 | host->ios.bus_mode = mode; |
1146 | mmc_set_ios(host); | |
778e277c | 1147 | mmc_host_clk_release(host); |
7ea239d9 PO |
1148 | } |
1149 | ||
0f8d8ea6 AH |
1150 | /* |
1151 | * Change data bus width of a host. | |
1152 | */ | |
1153 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1154 | { | |
778e277c | 1155 | mmc_host_clk_hold(host); |
4c4cb171 PR |
1156 | host->ios.bus_width = width; |
1157 | mmc_set_ios(host); | |
778e277c | 1158 | mmc_host_clk_release(host); |
0f8d8ea6 AH |
1159 | } |
1160 | ||
2d079c43 JR |
1161 | /* |
1162 | * Set initial state after a power cycle or a hw_reset. | |
1163 | */ | |
1164 | void mmc_set_initial_state(struct mmc_host *host) | |
1165 | { | |
79d5a65a AH |
1166 | mmc_retune_disable(host); |
1167 | ||
2d079c43 JR |
1168 | if (mmc_host_is_spi(host)) |
1169 | host->ios.chip_select = MMC_CS_HIGH; | |
1170 | else | |
1171 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1172 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
1173 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
1174 | host->ios.timing = MMC_TIMING_LEGACY; | |
1175 | ||
1176 | mmc_set_ios(host); | |
1177 | } | |
1178 | ||
86e8286a AV |
1179 | /** |
1180 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1181 | * @vdd: voltage (mV) | |
1182 | * @low_bits: prefer low bits in boundary cases | |
1183 | * | |
1184 | * This function returns the OCR bit number according to the provided @vdd | |
1185 | * value. If conversion is not possible a negative errno value returned. | |
1186 | * | |
1187 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1188 | * on boundary voltages. For example, | |
1189 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1190 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1191 | * | |
1192 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1193 | */ | |
1194 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1195 | { | |
1196 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1197 | int bit; | |
1198 | ||
1199 | if (vdd < 1650 || vdd > 3600) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | if (vdd >= 1650 && vdd <= 1950) | |
1203 | return ilog2(MMC_VDD_165_195); | |
1204 | ||
1205 | if (low_bits) | |
1206 | vdd -= 1; | |
1207 | ||
1208 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1209 | bit = (vdd - 2000) / 100 + 8; | |
1210 | if (bit > max_bit) | |
1211 | return max_bit; | |
1212 | return bit; | |
1213 | } | |
1214 | ||
1215 | /** | |
1216 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1217 | * @vdd_min: minimum voltage value (mV) | |
1218 | * @vdd_max: maximum voltage value (mV) | |
1219 | * | |
1220 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1221 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1222 | * | |
1223 | * Notes wrt boundary cases: | |
1224 | * This function sets the OCR bits for all boundary voltages, for example | |
1225 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1226 | * MMC_VDD_34_35 mask. | |
1227 | */ | |
1228 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1229 | { | |
1230 | u32 mask = 0; | |
1231 | ||
1232 | if (vdd_max < vdd_min) | |
1233 | return 0; | |
1234 | ||
1235 | /* Prefer high bits for the boundary vdd_max values. */ | |
1236 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1237 | if (vdd_max < 0) | |
1238 | return 0; | |
1239 | ||
1240 | /* Prefer low bits for the boundary vdd_min values. */ | |
1241 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1242 | if (vdd_min < 0) | |
1243 | return 0; | |
1244 | ||
1245 | /* Fill the mask, from max bit to min bit. */ | |
1246 | while (vdd_max >= vdd_min) | |
1247 | mask |= 1 << vdd_max--; | |
1248 | ||
1249 | return mask; | |
1250 | } | |
1251 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1252 | ||
6e9e318b HZ |
1253 | #ifdef CONFIG_OF |
1254 | ||
1255 | /** | |
1256 | * mmc_of_parse_voltage - return mask of supported voltages | |
1257 | * @np: The device node need to be parsed. | |
1258 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1259 | * | |
1260 | * 1. Return zero on success. | |
1261 | * 2. Return negative errno: voltage-range is invalid. | |
1262 | */ | |
1263 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1264 | { | |
1265 | const u32 *voltage_ranges; | |
1266 | int num_ranges, i; | |
1267 | ||
1268 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1269 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
1270 | if (!voltage_ranges || !num_ranges) { | |
1271 | pr_info("%s: voltage-ranges unspecified\n", np->full_name); | |
1272 | return -EINVAL; | |
1273 | } | |
1274 | ||
1275 | for (i = 0; i < num_ranges; i++) { | |
1276 | const int j = i * 2; | |
1277 | u32 ocr_mask; | |
1278 | ||
1279 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1280 | be32_to_cpu(voltage_ranges[j]), | |
1281 | be32_to_cpu(voltage_ranges[j + 1])); | |
1282 | if (!ocr_mask) { | |
1283 | pr_err("%s: voltage-range #%d is invalid\n", | |
1284 | np->full_name, i); | |
1285 | return -EINVAL; | |
1286 | } | |
1287 | *mask |= ocr_mask; | |
1288 | } | |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1293 | ||
1294 | #endif /* CONFIG_OF */ | |
1295 | ||
25185f3f SH |
1296 | static int mmc_of_get_func_num(struct device_node *node) |
1297 | { | |
1298 | u32 reg; | |
1299 | int ret; | |
1300 | ||
1301 | ret = of_property_read_u32(node, "reg", ®); | |
1302 | if (ret < 0) | |
1303 | return ret; | |
1304 | ||
1305 | return reg; | |
1306 | } | |
1307 | ||
1308 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1309 | unsigned func_num) | |
1310 | { | |
1311 | struct device_node *node; | |
1312 | ||
1313 | if (!host->parent || !host->parent->of_node) | |
1314 | return NULL; | |
1315 | ||
1316 | for_each_child_of_node(host->parent->of_node, node) { | |
1317 | if (mmc_of_get_func_num(node) == func_num) | |
1318 | return node; | |
1319 | } | |
1320 | ||
1321 | return NULL; | |
1322 | } | |
1323 | ||
5c13941a DB |
1324 | #ifdef CONFIG_REGULATOR |
1325 | ||
1326 | /** | |
1327 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1328 | * @supply: regulator to use | |
1329 | * | |
1330 | * This returns either a negative errno, or a mask of voltages that | |
1331 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1332 | * regulator. This would normally be called before registering the | |
1333 | * MMC host adapter. | |
1334 | */ | |
1335 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1336 | { | |
1337 | int result = 0; | |
1338 | int count; | |
1339 | int i; | |
9ed7ca89 JMC |
1340 | int vdd_uV; |
1341 | int vdd_mV; | |
5c13941a DB |
1342 | |
1343 | count = regulator_count_voltages(supply); | |
1344 | if (count < 0) | |
1345 | return count; | |
1346 | ||
1347 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1348 | vdd_uV = regulator_list_voltage(supply, i); |
1349 | if (vdd_uV <= 0) | |
1350 | continue; | |
1351 | ||
1352 | vdd_mV = vdd_uV / 1000; | |
1353 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1354 | } | |
1355 | ||
9ed7ca89 JMC |
1356 | if (!result) { |
1357 | vdd_uV = regulator_get_voltage(supply); | |
1358 | if (vdd_uV <= 0) | |
1359 | return vdd_uV; | |
1360 | ||
1361 | vdd_mV = vdd_uV / 1000; | |
1362 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1363 | } | |
1364 | ||
5c13941a DB |
1365 | return result; |
1366 | } | |
45a6b32e | 1367 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1368 | |
1369 | /** | |
1370 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1371 | * @mmc: the host to regulate |
5c13941a | 1372 | * @supply: regulator to use |
99fc5131 | 1373 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1374 | * |
1375 | * Returns zero on success, else negative errno. | |
1376 | * | |
1377 | * MMC host drivers may use this to enable or disable a regulator using | |
1378 | * a particular supply voltage. This would normally be called from the | |
1379 | * set_ios() method. | |
1380 | */ | |
99fc5131 LW |
1381 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1382 | struct regulator *supply, | |
1383 | unsigned short vdd_bit) | |
5c13941a DB |
1384 | { |
1385 | int result = 0; | |
1386 | int min_uV, max_uV; | |
5c13941a DB |
1387 | |
1388 | if (vdd_bit) { | |
1389 | int tmp; | |
5c13941a | 1390 | |
9cde5b7a CB |
1391 | /* |
1392 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
5c13941a DB |
1393 | * bits this regulator doesn't quite support ... don't |
1394 | * be too picky, most cards and regulators are OK with | |
1395 | * a 0.1V range goof (it's a small error percentage). | |
1396 | */ | |
1397 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1398 | if (tmp == 0) { | |
1399 | min_uV = 1650 * 1000; | |
1400 | max_uV = 1950 * 1000; | |
1401 | } else { | |
1402 | min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1403 | max_uV = min_uV + 100 * 1000; | |
1404 | } | |
1405 | ||
ca6429d4 | 1406 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1407 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1408 | result = regulator_enable(supply); |
99fc5131 LW |
1409 | if (!result) |
1410 | mmc->regulator_enabled = true; | |
1411 | } | |
1412 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1413 | result = regulator_disable(supply); |
99fc5131 LW |
1414 | if (result == 0) |
1415 | mmc->regulator_enabled = false; | |
5c13941a DB |
1416 | } |
1417 | ||
99fc5131 LW |
1418 | if (result) |
1419 | dev_err(mmc_dev(mmc), | |
1420 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1421 | return result; |
1422 | } | |
45a6b32e | 1423 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1424 | |
4d1f52f9 TK |
1425 | #endif /* CONFIG_REGULATOR */ |
1426 | ||
e137788d GL |
1427 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1428 | { | |
1429 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1430 | int ret; |
1431 | ||
4d1f52f9 | 1432 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1433 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1434 | |
4d1f52f9 TK |
1435 | if (IS_ERR(mmc->supply.vmmc)) { |
1436 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1437 | return -EPROBE_DEFER; | |
1438 | dev_info(dev, "No vmmc regulator found\n"); | |
1439 | } else { | |
1440 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1441 | if (ret > 0) | |
1442 | mmc->ocr_avail = ret; | |
1443 | else | |
1444 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1445 | } | |
e137788d | 1446 | |
4d1f52f9 TK |
1447 | if (IS_ERR(mmc->supply.vqmmc)) { |
1448 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1449 | return -EPROBE_DEFER; | |
1450 | dev_info(dev, "No vqmmc regulator found\n"); | |
1451 | } | |
e137788d GL |
1452 | |
1453 | return 0; | |
1454 | } | |
1455 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1456 | ||
1da177e4 LT |
1457 | /* |
1458 | * Mask off any voltages we don't support and select | |
1459 | * the lowest voltage | |
1460 | */ | |
7ea239d9 | 1461 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1462 | { |
1463 | int bit; | |
1464 | ||
726d6f23 UH |
1465 | /* |
1466 | * Sanity check the voltages that the card claims to | |
1467 | * support. | |
1468 | */ | |
1469 | if (ocr & 0x7F) { | |
1470 | dev_warn(mmc_dev(host), | |
1471 | "card claims to support voltages below defined range\n"); | |
1472 | ocr &= ~0x7F; | |
1473 | } | |
1474 | ||
1da177e4 | 1475 | ocr &= host->ocr_avail; |
ce69d37b UH |
1476 | if (!ocr) { |
1477 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1478 | return 0; | |
1479 | } | |
1da177e4 | 1480 | |
ce69d37b UH |
1481 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1482 | bit = ffs(ocr) - 1; | |
63ef731a | 1483 | ocr &= 3 << bit; |
ce69d37b | 1484 | mmc_power_cycle(host, ocr); |
1da177e4 | 1485 | } else { |
ce69d37b UH |
1486 | bit = fls(ocr) - 1; |
1487 | ocr &= 3 << bit; | |
1488 | if (bit != host->ios.vdd) | |
1489 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | return ocr; | |
1493 | } | |
1494 | ||
567c8903 JR |
1495 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
1496 | { | |
1497 | int err = 0; | |
1498 | int old_signal_voltage = host->ios.signal_voltage; | |
1499 | ||
1500 | host->ios.signal_voltage = signal_voltage; | |
1501 | if (host->ops->start_signal_voltage_switch) { | |
1502 | mmc_host_clk_hold(host); | |
1503 | err = host->ops->start_signal_voltage_switch(host, &host->ios); | |
1504 | mmc_host_clk_release(host); | |
1505 | } | |
1506 | ||
1507 | if (err) | |
1508 | host->ios.signal_voltage = old_signal_voltage; | |
1509 | ||
1510 | return err; | |
1511 | ||
1512 | } | |
1513 | ||
0f791fda | 1514 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr) |
f2119df6 AN |
1515 | { |
1516 | struct mmc_command cmd = {0}; | |
1517 | int err = 0; | |
0797e5f1 | 1518 | u32 clock; |
f2119df6 AN |
1519 | |
1520 | BUG_ON(!host); | |
1521 | ||
1522 | /* | |
1523 | * Send CMD11 only if the request is to switch the card to | |
1524 | * 1.8V signalling. | |
1525 | */ | |
0797e5f1 JR |
1526 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
1527 | return __mmc_set_signal_voltage(host, signal_voltage); | |
f2119df6 | 1528 | |
0797e5f1 JR |
1529 | /* |
1530 | * If we cannot switch voltages, return failure so the caller | |
1531 | * can continue without UHS mode | |
1532 | */ | |
1533 | if (!host->ops->start_signal_voltage_switch) | |
1534 | return -EPERM; | |
1535 | if (!host->ops->card_busy) | |
6606110d JP |
1536 | pr_warn("%s: cannot verify signal voltage switch\n", |
1537 | mmc_hostname(host)); | |
0797e5f1 | 1538 | |
c6eb5880 VY |
1539 | mmc_host_clk_hold(host); |
1540 | ||
0797e5f1 JR |
1541 | cmd.opcode = SD_SWITCH_VOLTAGE; |
1542 | cmd.arg = 0; | |
1543 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1544 | ||
1545 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1546 | if (err) | |
c6eb5880 | 1547 | goto err_command; |
0797e5f1 | 1548 | |
c6eb5880 VY |
1549 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) { |
1550 | err = -EIO; | |
1551 | goto err_command; | |
1552 | } | |
0797e5f1 JR |
1553 | /* |
1554 | * The card should drive cmd and dat[0:3] low immediately | |
1555 | * after the response of cmd11, but wait 1 ms to be sure | |
1556 | */ | |
1557 | mmc_delay(1); | |
1558 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1559 | err = -EAGAIN; | |
1560 | goto power_cycle; | |
1561 | } | |
1562 | /* | |
1563 | * During a signal voltage level switch, the clock must be gated | |
1564 | * for 5 ms according to the SD spec | |
1565 | */ | |
1566 | clock = host->ios.clock; | |
1567 | host->ios.clock = 0; | |
1568 | mmc_set_ios(host); | |
f2119df6 | 1569 | |
0797e5f1 JR |
1570 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
1571 | /* | |
1572 | * Voltages may not have been switched, but we've already | |
1573 | * sent CMD11, so a power cycle is required anyway | |
1574 | */ | |
1575 | err = -EAGAIN; | |
1576 | goto power_cycle; | |
f2119df6 AN |
1577 | } |
1578 | ||
0797e5f1 JR |
1579 | /* Keep clock gated for at least 5 ms */ |
1580 | mmc_delay(5); | |
1581 | host->ios.clock = clock; | |
1582 | mmc_set_ios(host); | |
1583 | ||
1584 | /* Wait for at least 1 ms according to spec */ | |
1585 | mmc_delay(1); | |
1586 | ||
1587 | /* | |
1588 | * Failure to switch is indicated by the card holding | |
1589 | * dat[0:3] low | |
1590 | */ | |
1591 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1592 | err = -EAGAIN; | |
1593 | ||
1594 | power_cycle: | |
1595 | if (err) { | |
1596 | pr_debug("%s: Signal voltage switch failed, " | |
1597 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1598 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1599 | } |
1600 | ||
c6eb5880 | 1601 | err_command: |
0797e5f1 JR |
1602 | mmc_host_clk_release(host); |
1603 | ||
1604 | return err; | |
f2119df6 AN |
1605 | } |
1606 | ||
b57c43ad | 1607 | /* |
7ea239d9 | 1608 | * Select timing parameters for host. |
b57c43ad | 1609 | */ |
7ea239d9 | 1610 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1611 | { |
778e277c | 1612 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1613 | host->ios.timing = timing; |
1614 | mmc_set_ios(host); | |
778e277c | 1615 | mmc_host_clk_release(host); |
b57c43ad PO |
1616 | } |
1617 | ||
d6d50a15 AN |
1618 | /* |
1619 | * Select appropriate driver type for host. | |
1620 | */ | |
1621 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1622 | { | |
778e277c | 1623 | mmc_host_clk_hold(host); |
d6d50a15 AN |
1624 | host->ios.drv_type = drv_type; |
1625 | mmc_set_ios(host); | |
778e277c | 1626 | mmc_host_clk_release(host); |
d6d50a15 AN |
1627 | } |
1628 | ||
1da177e4 | 1629 | /* |
45f8245b RK |
1630 | * Apply power to the MMC stack. This is a two-stage process. |
1631 | * First, we enable power to the card without the clock running. | |
1632 | * We then wait a bit for the power to stabilise. Finally, | |
1633 | * enable the bus drivers and clock to the card. | |
1634 | * | |
1635 | * We must _NOT_ enable the clock prior to power stablising. | |
1636 | * | |
1637 | * If a host does all the power sequencing itself, ignore the | |
1638 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1639 | */ |
4a065193 | 1640 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1641 | { |
fa550189 UH |
1642 | if (host->ios.power_mode == MMC_POWER_ON) |
1643 | return; | |
1644 | ||
778e277c MW |
1645 | mmc_host_clk_hold(host); |
1646 | ||
3aa8793f UH |
1647 | mmc_pwrseq_pre_power_on(host); |
1648 | ||
4a065193 | 1649 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1650 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1651 | /* Set initial state and call mmc_set_ios */ |
1652 | mmc_set_initial_state(host); | |
1da177e4 | 1653 | |
ceae98f2 TK |
1654 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
1655 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) | |
1656 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1657 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) | |
1658 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1659 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) | |
1660 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
108ecc4c | 1661 | |
f9996aee PO |
1662 | /* |
1663 | * This delay should be sufficient to allow the power supply | |
1664 | * to reach the minimum voltage. | |
1665 | */ | |
79bccc5a | 1666 | mmc_delay(10); |
1da177e4 | 1667 | |
4febb7e2 UH |
1668 | mmc_pwrseq_post_power_on(host); |
1669 | ||
88ae8b86 | 1670 | host->ios.clock = host->f_init; |
8dfd0374 | 1671 | |
1da177e4 | 1672 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1673 | mmc_set_ios(host); |
1da177e4 | 1674 | |
f9996aee PO |
1675 | /* |
1676 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1677 | * time required to reach a stable voltage. | |
1678 | */ | |
79bccc5a | 1679 | mmc_delay(10); |
778e277c MW |
1680 | |
1681 | mmc_host_clk_release(host); | |
1da177e4 LT |
1682 | } |
1683 | ||
7f7e4129 | 1684 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1685 | { |
fa550189 UH |
1686 | if (host->ios.power_mode == MMC_POWER_OFF) |
1687 | return; | |
1688 | ||
778e277c MW |
1689 | mmc_host_clk_hold(host); |
1690 | ||
3aa8793f UH |
1691 | mmc_pwrseq_power_off(host); |
1692 | ||
1da177e4 LT |
1693 | host->ios.clock = 0; |
1694 | host->ios.vdd = 0; | |
b33d46c3 | 1695 | |
1da177e4 | 1696 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1697 | /* Set initial state and call mmc_set_ios */ |
1698 | mmc_set_initial_state(host); | |
778e277c | 1699 | |
041beb1d DD |
1700 | /* |
1701 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1702 | * XO-1.5, require a short delay after poweroff before the card | |
1703 | * can be successfully turned on again. | |
1704 | */ | |
1705 | mmc_delay(1); | |
1706 | ||
778e277c | 1707 | mmc_host_clk_release(host); |
1da177e4 LT |
1708 | } |
1709 | ||
4a065193 | 1710 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1711 | { |
1712 | mmc_power_off(host); | |
1713 | /* Wait at least 1 ms according to SD spec */ | |
1714 | mmc_delay(1); | |
4a065193 | 1715 | mmc_power_up(host, ocr); |
276e090f JR |
1716 | } |
1717 | ||
39361851 AB |
1718 | /* |
1719 | * Cleanup when the last reference to the bus operator is dropped. | |
1720 | */ | |
261172fd | 1721 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 AB |
1722 | { |
1723 | BUG_ON(!host); | |
1724 | BUG_ON(host->bus_refs); | |
1725 | BUG_ON(!host->bus_dead); | |
1726 | ||
1727 | host->bus_ops = NULL; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * Increase reference count of bus operator | |
1732 | */ | |
1733 | static inline void mmc_bus_get(struct mmc_host *host) | |
1734 | { | |
1735 | unsigned long flags; | |
1736 | ||
1737 | spin_lock_irqsave(&host->lock, flags); | |
1738 | host->bus_refs++; | |
1739 | spin_unlock_irqrestore(&host->lock, flags); | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * Decrease reference count of bus operator and free it if | |
1744 | * it is the last reference. | |
1745 | */ | |
1746 | static inline void mmc_bus_put(struct mmc_host *host) | |
1747 | { | |
1748 | unsigned long flags; | |
1749 | ||
1750 | spin_lock_irqsave(&host->lock, flags); | |
1751 | host->bus_refs--; | |
1752 | if ((host->bus_refs == 0) && host->bus_ops) | |
1753 | __mmc_release_bus(host); | |
1754 | spin_unlock_irqrestore(&host->lock, flags); | |
1755 | } | |
1756 | ||
1da177e4 | 1757 | /* |
7ea239d9 PO |
1758 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1759 | * host at any given time. | |
1da177e4 | 1760 | */ |
7ea239d9 | 1761 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1762 | { |
7ea239d9 | 1763 | unsigned long flags; |
e45a1bd2 | 1764 | |
7ea239d9 PO |
1765 | BUG_ON(!host); |
1766 | BUG_ON(!ops); | |
b855885e | 1767 | |
d84075c8 | 1768 | WARN_ON(!host->claimed); |
bce40a36 | 1769 | |
7ea239d9 | 1770 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1771 | |
7ea239d9 PO |
1772 | BUG_ON(host->bus_ops); |
1773 | BUG_ON(host->bus_refs); | |
b57c43ad | 1774 | |
7ea239d9 PO |
1775 | host->bus_ops = ops; |
1776 | host->bus_refs = 1; | |
1777 | host->bus_dead = 0; | |
b57c43ad | 1778 | |
7ea239d9 | 1779 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1780 | } |
1781 | ||
7ea239d9 | 1782 | /* |
7f7e4129 | 1783 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1784 | */ |
1785 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1786 | { |
7ea239d9 | 1787 | unsigned long flags; |
7ccd266e | 1788 | |
7ea239d9 | 1789 | BUG_ON(!host); |
7ccd266e | 1790 | |
d84075c8 PO |
1791 | WARN_ON(!host->claimed); |
1792 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1793 | |
7ea239d9 | 1794 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1795 | |
7ea239d9 | 1796 | host->bus_dead = 1; |
7ccd266e | 1797 | |
7ea239d9 | 1798 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1799 | |
7ea239d9 | 1800 | mmc_bus_put(host); |
1da177e4 LT |
1801 | } |
1802 | ||
bbd43682 UH |
1803 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1804 | bool cd_irq) | |
1805 | { | |
1806 | #ifdef CONFIG_MMC_DEBUG | |
1807 | unsigned long flags; | |
1808 | spin_lock_irqsave(&host->lock, flags); | |
1809 | WARN_ON(host->removed); | |
1810 | spin_unlock_irqrestore(&host->lock, flags); | |
1811 | #endif | |
1812 | ||
1813 | /* | |
1814 | * If the device is configured as wakeup, we prevent a new sleep for | |
1815 | * 5 s to give provision for user space to consume the event. | |
1816 | */ | |
1817 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1818 | device_can_wakeup(mmc_dev(host))) | |
1819 | pm_wakeup_event(mmc_dev(host), 5000); | |
1820 | ||
1821 | host->detect_change = 1; | |
1822 | mmc_schedule_delayed_work(&host->detect, delay); | |
1823 | } | |
1824 | ||
1da177e4 LT |
1825 | /** |
1826 | * mmc_detect_change - process change of state on a MMC socket | |
1827 | * @host: host which changed state. | |
8dc00335 | 1828 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1829 | * |
67a61c48 PO |
1830 | * MMC drivers should call this when they detect a card has been |
1831 | * inserted or removed. The MMC layer will confirm that any | |
1832 | * present card is still functional, and initialize any newly | |
1833 | * inserted. | |
1da177e4 | 1834 | */ |
8dc00335 | 1835 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1836 | { |
bbd43682 | 1837 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1838 | } |
1da177e4 LT |
1839 | EXPORT_SYMBOL(mmc_detect_change); |
1840 | ||
dfe86cba AH |
1841 | void mmc_init_erase(struct mmc_card *card) |
1842 | { | |
1843 | unsigned int sz; | |
1844 | ||
1845 | if (is_power_of_2(card->erase_size)) | |
1846 | card->erase_shift = ffs(card->erase_size) - 1; | |
1847 | else | |
1848 | card->erase_shift = 0; | |
1849 | ||
1850 | /* | |
1851 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1852 | * card. That is not desirable because it can take a long time | |
1853 | * (minutes) potentially delaying more important I/O, and also the | |
1854 | * timeout calculations become increasingly hugely over-estimated. | |
1855 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1856 | * to that size and alignment. | |
1857 | * | |
1858 | * For SD cards that define Allocation Unit size, limit erases to one | |
1859 | * Allocation Unit at a time. For MMC cards that define High Capacity | |
1860 | * Erase Size, whether it is switched on or not, limit to that size. | |
1861 | * Otherwise just have a stab at a good value. For modern cards it | |
1862 | * will end up being 4MiB. Note that if the value is too small, it | |
1863 | * can end up taking longer to erase. | |
1864 | */ | |
1865 | if (mmc_card_sd(card) && card->ssr.au) { | |
1866 | card->pref_erase = card->ssr.au; | |
1867 | card->erase_shift = ffs(card->ssr.au) - 1; | |
1868 | } else if (card->ext_csd.hc_erase_size) { | |
1869 | card->pref_erase = card->ext_csd.hc_erase_size; | |
cc8aa7de | 1870 | } else if (card->erase_size) { |
dfe86cba AH |
1871 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1872 | if (sz < 128) | |
1873 | card->pref_erase = 512 * 1024 / 512; | |
1874 | else if (sz < 512) | |
1875 | card->pref_erase = 1024 * 1024 / 512; | |
1876 | else if (sz < 1024) | |
1877 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1878 | else | |
1879 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1880 | if (card->pref_erase < card->erase_size) | |
1881 | card->pref_erase = card->erase_size; | |
1882 | else { | |
1883 | sz = card->pref_erase % card->erase_size; | |
1884 | if (sz) | |
1885 | card->pref_erase += card->erase_size - sz; | |
1886 | } | |
cc8aa7de CD |
1887 | } else |
1888 | card->pref_erase = 0; | |
dfe86cba AH |
1889 | } |
1890 | ||
eaa02f75 AW |
1891 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1892 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1893 | { |
1894 | unsigned int erase_timeout; | |
1895 | ||
7194efb8 AH |
1896 | if (arg == MMC_DISCARD_ARG || |
1897 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1898 | erase_timeout = card->ext_csd.trim_timeout; | |
1899 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1900 | /* High Capacity Erase Group Size uses HC timeouts */ |
1901 | if (arg == MMC_TRIM_ARG) | |
1902 | erase_timeout = card->ext_csd.trim_timeout; | |
1903 | else | |
1904 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1905 | } else { | |
1906 | /* CSD Erase Group Size uses write timeout */ | |
1907 | unsigned int mult = (10 << card->csd.r2w_factor); | |
1908 | unsigned int timeout_clks = card->csd.tacc_clks * mult; | |
1909 | unsigned int timeout_us; | |
1910 | ||
1911 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ | |
1912 | if (card->csd.tacc_ns < 1000000) | |
1913 | timeout_us = (card->csd.tacc_ns * mult) / 1000; | |
1914 | else | |
1915 | timeout_us = (card->csd.tacc_ns / 1000) * mult; | |
1916 | ||
1917 | /* | |
1918 | * ios.clock is only a target. The real clock rate might be | |
1919 | * less but not that much less, so fudge it by multiplying by 2. | |
1920 | */ | |
1921 | timeout_clks <<= 1; | |
1922 | timeout_us += (timeout_clks * 1000) / | |
4cf8c6dd | 1923 | (mmc_host_clk_rate(card->host) / 1000); |
dfe86cba AH |
1924 | |
1925 | erase_timeout = timeout_us / 1000; | |
1926 | ||
1927 | /* | |
1928 | * Theoretically, the calculation could underflow so round up | |
1929 | * to 1ms in that case. | |
1930 | */ | |
1931 | if (!erase_timeout) | |
1932 | erase_timeout = 1; | |
1933 | } | |
1934 | ||
1935 | /* Multiplier for secure operations */ | |
1936 | if (arg & MMC_SECURE_ARGS) { | |
1937 | if (arg == MMC_SECURE_ERASE_ARG) | |
1938 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1939 | else | |
1940 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1941 | } | |
1942 | ||
1943 | erase_timeout *= qty; | |
1944 | ||
1945 | /* | |
1946 | * Ensure at least a 1 second timeout for SPI as per | |
1947 | * 'mmc_set_data_timeout()' | |
1948 | */ | |
1949 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
1950 | erase_timeout = 1000; | |
1951 | ||
eaa02f75 | 1952 | return erase_timeout; |
dfe86cba AH |
1953 | } |
1954 | ||
eaa02f75 AW |
1955 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
1956 | unsigned int arg, | |
1957 | unsigned int qty) | |
dfe86cba | 1958 | { |
eaa02f75 AW |
1959 | unsigned int erase_timeout; |
1960 | ||
dfe86cba AH |
1961 | if (card->ssr.erase_timeout) { |
1962 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
1963 | erase_timeout = card->ssr.erase_timeout * qty + |
1964 | card->ssr.erase_offset; | |
dfe86cba AH |
1965 | } else { |
1966 | /* | |
1967 | * Erase timeout not specified in SD Status Register (SSR) so | |
1968 | * use 250ms per write block. | |
1969 | */ | |
eaa02f75 | 1970 | erase_timeout = 250 * qty; |
dfe86cba AH |
1971 | } |
1972 | ||
1973 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
1974 | if (erase_timeout < 1000) |
1975 | erase_timeout = 1000; | |
1976 | ||
1977 | return erase_timeout; | |
dfe86cba AH |
1978 | } |
1979 | ||
eaa02f75 AW |
1980 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
1981 | unsigned int arg, | |
1982 | unsigned int qty) | |
dfe86cba AH |
1983 | { |
1984 | if (mmc_card_sd(card)) | |
eaa02f75 | 1985 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 1986 | else |
eaa02f75 | 1987 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1988 | } |
1989 | ||
1990 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
1991 | unsigned int to, unsigned int arg) | |
1992 | { | |
1278dba1 | 1993 | struct mmc_command cmd = {0}; |
dfe86cba | 1994 | unsigned int qty = 0; |
8fee476b | 1995 | unsigned long timeout; |
dfe86cba AH |
1996 | int err; |
1997 | ||
1998 | /* | |
1999 | * qty is used to calculate the erase timeout which depends on how many | |
2000 | * erase groups (or allocation units in SD terminology) are affected. | |
2001 | * We count erasing part of an erase group as one erase group. | |
2002 | * For SD, the allocation units are always a power of 2. For MMC, the | |
2003 | * erase group size is almost certainly also power of 2, but it does not | |
2004 | * seem to insist on that in the JEDEC standard, so we fall back to | |
2005 | * division in that case. SD may not specify an allocation unit size, | |
2006 | * in which case the timeout is based on the number of write blocks. | |
2007 | * | |
2008 | * Note that the timeout for secure trim 2 will only be correct if the | |
2009 | * number of erase groups specified is the same as the total of all | |
2010 | * preceding secure trim 1 commands. Since the power may have been | |
2011 | * lost since the secure trim 1 commands occurred, it is generally | |
2012 | * impossible to calculate the secure trim 2 timeout correctly. | |
2013 | */ | |
2014 | if (card->erase_shift) | |
2015 | qty += ((to >> card->erase_shift) - | |
2016 | (from >> card->erase_shift)) + 1; | |
2017 | else if (mmc_card_sd(card)) | |
2018 | qty += to - from + 1; | |
2019 | else | |
2020 | qty += ((to / card->erase_size) - | |
2021 | (from / card->erase_size)) + 1; | |
2022 | ||
2023 | if (!mmc_card_blockaddr(card)) { | |
2024 | from <<= 9; | |
2025 | to <<= 9; | |
2026 | } | |
2027 | ||
dfe86cba AH |
2028 | if (mmc_card_sd(card)) |
2029 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
2030 | else | |
2031 | cmd.opcode = MMC_ERASE_GROUP_START; | |
2032 | cmd.arg = from; | |
2033 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2034 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2035 | if (err) { | |
a3c76eb9 | 2036 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 2037 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 2038 | err = -EIO; |
dfe86cba AH |
2039 | goto out; |
2040 | } | |
2041 | ||
2042 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2043 | if (mmc_card_sd(card)) | |
2044 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
2045 | else | |
2046 | cmd.opcode = MMC_ERASE_GROUP_END; | |
2047 | cmd.arg = to; | |
2048 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2049 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2050 | if (err) { | |
a3c76eb9 | 2051 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 2052 | err, cmd.resp[0]); |
67716327 | 2053 | err = -EIO; |
dfe86cba AH |
2054 | goto out; |
2055 | } | |
2056 | ||
2057 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2058 | cmd.opcode = MMC_ERASE; | |
2059 | cmd.arg = arg; | |
2060 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1d4d7744 | 2061 | cmd.busy_timeout = mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2062 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
2063 | if (err) { | |
a3c76eb9 | 2064 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
2065 | err, cmd.resp[0]); |
2066 | err = -EIO; | |
2067 | goto out; | |
2068 | } | |
2069 | ||
2070 | if (mmc_host_is_spi(card->host)) | |
2071 | goto out; | |
2072 | ||
8fee476b | 2073 | timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); |
dfe86cba AH |
2074 | do { |
2075 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2076 | cmd.opcode = MMC_SEND_STATUS; | |
2077 | cmd.arg = card->rca << 16; | |
2078 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
2079 | /* Do not retry else we can't see errors */ | |
2080 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2081 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 2082 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
2083 | err, cmd.resp[0]); |
2084 | err = -EIO; | |
2085 | goto out; | |
2086 | } | |
8fee476b TR |
2087 | |
2088 | /* Timeout if the device never becomes ready for data and | |
2089 | * never leaves the program state. | |
2090 | */ | |
2091 | if (time_after(jiffies, timeout)) { | |
2092 | pr_err("%s: Card stuck in programming state! %s\n", | |
2093 | mmc_hostname(card->host), __func__); | |
2094 | err = -EIO; | |
2095 | goto out; | |
2096 | } | |
2097 | ||
dfe86cba | 2098 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2099 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba AH |
2100 | out: |
2101 | return err; | |
2102 | } | |
2103 | ||
2104 | /** | |
2105 | * mmc_erase - erase sectors. | |
2106 | * @card: card to erase | |
2107 | * @from: first sector to erase | |
2108 | * @nr: number of sectors to erase | |
2109 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2110 | * | |
2111 | * Caller must claim host before calling this function. | |
2112 | */ | |
2113 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2114 | unsigned int arg) | |
2115 | { | |
2116 | unsigned int rem, to = from + nr; | |
2117 | ||
2118 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2119 | !(card->csd.cmdclass & CCC_ERASE)) | |
2120 | return -EOPNOTSUPP; | |
2121 | ||
2122 | if (!card->erase_size) | |
2123 | return -EOPNOTSUPP; | |
2124 | ||
2125 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2126 | return -EOPNOTSUPP; | |
2127 | ||
2128 | if ((arg & MMC_SECURE_ARGS) && | |
2129 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2130 | return -EOPNOTSUPP; | |
2131 | ||
2132 | if ((arg & MMC_TRIM_ARGS) && | |
2133 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2134 | return -EOPNOTSUPP; | |
2135 | ||
2136 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2137 | if (from % card->erase_size || nr % card->erase_size) | |
2138 | return -EINVAL; | |
2139 | } | |
2140 | ||
2141 | if (arg == MMC_ERASE_ARG) { | |
2142 | rem = from % card->erase_size; | |
2143 | if (rem) { | |
2144 | rem = card->erase_size - rem; | |
2145 | from += rem; | |
2146 | if (nr > rem) | |
2147 | nr -= rem; | |
2148 | else | |
2149 | return 0; | |
2150 | } | |
2151 | rem = nr % card->erase_size; | |
2152 | if (rem) | |
2153 | nr -= rem; | |
2154 | } | |
2155 | ||
2156 | if (nr == 0) | |
2157 | return 0; | |
2158 | ||
2159 | to = from + nr; | |
2160 | ||
2161 | if (to <= from) | |
2162 | return -EINVAL; | |
2163 | ||
2164 | /* 'from' and 'to' are inclusive */ | |
2165 | to -= 1; | |
2166 | ||
2167 | return mmc_do_erase(card, from, to, arg); | |
2168 | } | |
2169 | EXPORT_SYMBOL(mmc_erase); | |
2170 | ||
2171 | int mmc_can_erase(struct mmc_card *card) | |
2172 | { | |
2173 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2174 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2175 | return 1; | |
2176 | return 0; | |
2177 | } | |
2178 | EXPORT_SYMBOL(mmc_can_erase); | |
2179 | ||
2180 | int mmc_can_trim(struct mmc_card *card) | |
2181 | { | |
2182 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) | |
2183 | return 1; | |
2184 | return 0; | |
2185 | } | |
2186 | EXPORT_SYMBOL(mmc_can_trim); | |
2187 | ||
b3bf9153 KP |
2188 | int mmc_can_discard(struct mmc_card *card) |
2189 | { | |
2190 | /* | |
2191 | * As there's no way to detect the discard support bit at v4.5 | |
2192 | * use the s/w feature support filed. | |
2193 | */ | |
2194 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2195 | return 1; | |
2196 | return 0; | |
2197 | } | |
2198 | EXPORT_SYMBOL(mmc_can_discard); | |
2199 | ||
d9ddd629 KP |
2200 | int mmc_can_sanitize(struct mmc_card *card) |
2201 | { | |
28302812 AH |
2202 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2203 | return 0; | |
d9ddd629 KP |
2204 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2205 | return 1; | |
2206 | return 0; | |
2207 | } | |
2208 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2209 | ||
dfe86cba AH |
2210 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2211 | { | |
5204d00f LC |
2212 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2213 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2214 | return 1; |
2215 | return 0; | |
2216 | } | |
2217 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2218 | ||
2219 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2220 | unsigned int nr) | |
2221 | { | |
2222 | if (!card->erase_size) | |
2223 | return 0; | |
2224 | if (from % card->erase_size || nr % card->erase_size) | |
2225 | return 0; | |
2226 | return 1; | |
2227 | } | |
2228 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2229 | |
e056a1b5 AH |
2230 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2231 | unsigned int arg) | |
2232 | { | |
2233 | struct mmc_host *host = card->host; | |
2234 | unsigned int max_discard, x, y, qty = 0, max_qty, timeout; | |
2235 | unsigned int last_timeout = 0; | |
2236 | ||
2237 | if (card->erase_shift) | |
2238 | max_qty = UINT_MAX >> card->erase_shift; | |
2239 | else if (mmc_card_sd(card)) | |
2240 | max_qty = UINT_MAX; | |
2241 | else | |
2242 | max_qty = UINT_MAX / card->erase_size; | |
2243 | ||
2244 | /* Find the largest qty with an OK timeout */ | |
2245 | do { | |
2246 | y = 0; | |
2247 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2248 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
68eb80e0 | 2249 | if (timeout > host->max_busy_timeout) |
e056a1b5 AH |
2250 | break; |
2251 | if (timeout < last_timeout) | |
2252 | break; | |
2253 | last_timeout = timeout; | |
2254 | y = x; | |
2255 | } | |
2256 | qty += y; | |
2257 | } while (y); | |
2258 | ||
2259 | if (!qty) | |
2260 | return 0; | |
2261 | ||
2262 | if (qty == 1) | |
2263 | return 1; | |
2264 | ||
2265 | /* Convert qty to sectors */ | |
2266 | if (card->erase_shift) | |
2267 | max_discard = --qty << card->erase_shift; | |
2268 | else if (mmc_card_sd(card)) | |
2269 | max_discard = qty; | |
2270 | else | |
2271 | max_discard = --qty * card->erase_size; | |
2272 | ||
2273 | return max_discard; | |
2274 | } | |
2275 | ||
2276 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2277 | { | |
2278 | struct mmc_host *host = card->host; | |
2279 | unsigned int max_discard, max_trim; | |
2280 | ||
68eb80e0 | 2281 | if (!host->max_busy_timeout) |
e056a1b5 AH |
2282 | return UINT_MAX; |
2283 | ||
2284 | /* | |
2285 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2286 | * frequence which can change. In that case, the best choice is | |
2287 | * just the preferred erase size. | |
2288 | */ | |
2289 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2290 | return card->pref_erase; | |
2291 | ||
2292 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2293 | if (mmc_can_trim(card)) { | |
2294 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2295 | if (max_trim < max_discard) | |
2296 | max_discard = max_trim; | |
2297 | } else if (max_discard < card->erase_size) { | |
2298 | max_discard = 0; | |
2299 | } | |
2300 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
68eb80e0 | 2301 | mmc_hostname(host), max_discard, host->max_busy_timeout); |
e056a1b5 AH |
2302 | return max_discard; |
2303 | } | |
2304 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2305 | ||
0f8d8ea6 AH |
2306 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2307 | { | |
1278dba1 | 2308 | struct mmc_command cmd = {0}; |
0f8d8ea6 | 2309 | |
cdc99179 | 2310 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card)) |
0f8d8ea6 AH |
2311 | return 0; |
2312 | ||
0f8d8ea6 AH |
2313 | cmd.opcode = MMC_SET_BLOCKLEN; |
2314 | cmd.arg = blocklen; | |
2315 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2316 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2317 | } | |
2318 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2319 | ||
67c79db8 LP |
2320 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2321 | bool is_rel_write) | |
2322 | { | |
2323 | struct mmc_command cmd = {0}; | |
2324 | ||
2325 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2326 | cmd.arg = blockcount & 0x0000FFFF; | |
2327 | if (is_rel_write) | |
2328 | cmd.arg |= 1 << 31; | |
2329 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2330 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2331 | } | |
2332 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2333 | ||
b2499518 AH |
2334 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2335 | { | |
2336 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) | |
2337 | return; | |
2338 | mmc_host_clk_hold(host); | |
2339 | host->ops->hw_reset(host); | |
2340 | mmc_host_clk_release(host); | |
2341 | } | |
2342 | ||
83533ab2 | 2343 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2344 | { |
f855a371 | 2345 | int ret; |
b2499518 | 2346 | |
f855a371 | 2347 | if (!host->card) |
b2499518 AH |
2348 | return -EINVAL; |
2349 | ||
f855a371 JR |
2350 | mmc_bus_get(host); |
2351 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { | |
2352 | mmc_bus_put(host); | |
b2499518 | 2353 | return -EOPNOTSUPP; |
b2499518 AH |
2354 | } |
2355 | ||
f855a371 JR |
2356 | ret = host->bus_ops->reset(host); |
2357 | mmc_bus_put(host); | |
b2499518 | 2358 | |
f855a371 | 2359 | pr_warn("%s: tried to reset card\n", mmc_hostname(host)); |
b2499518 | 2360 | |
f855a371 | 2361 | return ret; |
b2499518 | 2362 | } |
b2499518 AH |
2363 | EXPORT_SYMBOL(mmc_hw_reset); |
2364 | ||
807e8e40 AR |
2365 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2366 | { | |
2367 | host->f_init = freq; | |
2368 | ||
2369 | #ifdef CONFIG_MMC_DEBUG | |
2370 | pr_info("%s: %s: trying to init card at %u Hz\n", | |
2371 | mmc_hostname(host), __func__, host->f_init); | |
2372 | #endif | |
4a065193 | 2373 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2374 | |
b2499518 AH |
2375 | /* |
2376 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2377 | * do a hardware reset if possible. | |
2378 | */ | |
2379 | mmc_hw_reset_for_init(host); | |
2380 | ||
2f94e55a PR |
2381 | /* |
2382 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2383 | * if the card is being re-initialized, just send it. CMD52 | |
2384 | * should be ignored by SD/eMMC cards. | |
2385 | */ | |
807e8e40 AR |
2386 | sdio_reset(host); |
2387 | mmc_go_idle(host); | |
2388 | ||
2389 | mmc_send_if_cond(host, host->ocr_avail); | |
2390 | ||
2391 | /* Order's important: probe SDIO, then SD, then MMC */ | |
2392 | if (!mmc_attach_sdio(host)) | |
2393 | return 0; | |
2394 | if (!mmc_attach_sd(host)) | |
2395 | return 0; | |
2396 | if (!mmc_attach_mmc(host)) | |
2397 | return 0; | |
2398 | ||
2399 | mmc_power_off(host); | |
2400 | return -EIO; | |
2401 | } | |
2402 | ||
d3049504 AH |
2403 | int _mmc_detect_card_removed(struct mmc_host *host) |
2404 | { | |
2405 | int ret; | |
2406 | ||
5601aaf7 | 2407 | if (host->caps & MMC_CAP_NONREMOVABLE) |
d3049504 AH |
2408 | return 0; |
2409 | ||
2410 | if (!host->card || mmc_card_removed(host->card)) | |
2411 | return 1; | |
2412 | ||
2413 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2414 | |
2415 | /* | |
2416 | * Card detect status and alive check may be out of sync if card is | |
2417 | * removed slowly, when card detect switch changes while card/slot | |
2418 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2419 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2420 | * detect work 200ms later for this case. | |
2421 | */ | |
2422 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2423 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2424 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2425 | } | |
2426 | ||
d3049504 AH |
2427 | if (ret) { |
2428 | mmc_card_set_removed(host->card); | |
2429 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2430 | } | |
2431 | ||
2432 | return ret; | |
2433 | } | |
2434 | ||
2435 | int mmc_detect_card_removed(struct mmc_host *host) | |
2436 | { | |
2437 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2438 | int ret; |
d3049504 AH |
2439 | |
2440 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2441 | |
2442 | if (!card) | |
2443 | return 1; | |
2444 | ||
2445 | ret = mmc_card_removed(card); | |
d3049504 AH |
2446 | /* |
2447 | * The card will be considered unchanged unless we have been asked to | |
2448 | * detect a change or host requires polling to provide card detection. | |
2449 | */ | |
b6891679 | 2450 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2451 | return ret; |
d3049504 AH |
2452 | |
2453 | host->detect_change = 0; | |
f0cc9cf9 UH |
2454 | if (!ret) { |
2455 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2456 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2457 | /* |
2458 | * Schedule a detect work as soon as possible to let a | |
2459 | * rescan handle the card removal. | |
2460 | */ | |
2461 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2462 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2463 | } |
2464 | } | |
d3049504 | 2465 | |
f0cc9cf9 | 2466 | return ret; |
d3049504 AH |
2467 | } |
2468 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2469 | ||
b93931a6 | 2470 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2471 | { |
c4028958 DH |
2472 | struct mmc_host *host = |
2473 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2474 | int i; |
4c2ef25f | 2475 | |
fa372a51 MM |
2476 | if (host->trigger_card_event && host->ops->card_event) { |
2477 | host->ops->card_event(host); | |
2478 | host->trigger_card_event = false; | |
2479 | } | |
2480 | ||
807e8e40 | 2481 | if (host->rescan_disable) |
4c2ef25f | 2482 | return; |
1da177e4 | 2483 | |
3339d1e3 JR |
2484 | /* If there is a non-removable card registered, only scan once */ |
2485 | if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) | |
2486 | return; | |
2487 | host->rescan_entered = 1; | |
2488 | ||
7ea239d9 | 2489 | mmc_bus_get(host); |
b855885e | 2490 | |
30201e7f OBC |
2491 | /* |
2492 | * if there is a _removable_ card registered, check whether it is | |
2493 | * still present | |
2494 | */ | |
5601aaf7 | 2495 | if (host->bus_ops && !host->bus_dead |
bad3baba | 2496 | && !(host->caps & MMC_CAP_NONREMOVABLE)) |
94d89efb JS |
2497 | host->bus_ops->detect(host); |
2498 | ||
d3049504 AH |
2499 | host->detect_change = 0; |
2500 | ||
c5841798 CB |
2501 | /* |
2502 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2503 | * the card is no longer present. | |
2504 | */ | |
94d89efb | 2505 | mmc_bus_put(host); |
94d89efb JS |
2506 | mmc_bus_get(host); |
2507 | ||
2508 | /* if there still is a card present, stop here */ | |
2509 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2510 | mmc_bus_put(host); |
94d89efb JS |
2511 | goto out; |
2512 | } | |
1da177e4 | 2513 | |
94d89efb JS |
2514 | /* |
2515 | * Only we can add a new handler, so it's safe to | |
2516 | * release the lock here. | |
2517 | */ | |
2518 | mmc_bus_put(host); | |
1da177e4 | 2519 | |
c1b55bfc SH |
2520 | if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && |
2521 | host->ops->get_cd(host) == 0) { | |
fa550189 UH |
2522 | mmc_claim_host(host); |
2523 | mmc_power_off(host); | |
2524 | mmc_release_host(host); | |
94d89efb | 2525 | goto out; |
fa550189 | 2526 | } |
1da177e4 | 2527 | |
807e8e40 | 2528 | mmc_claim_host(host); |
88ae8b86 | 2529 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2530 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2531 | break; | |
06b2233a | 2532 | if (freqs[i] <= host->f_min) |
807e8e40 | 2533 | break; |
88ae8b86 | 2534 | } |
807e8e40 AR |
2535 | mmc_release_host(host); |
2536 | ||
2537 | out: | |
28f52482 AV |
2538 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2539 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2540 | } |
2541 | ||
b93931a6 | 2542 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2543 | { |
fa550189 | 2544 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2545 | host->rescan_disable = 0; |
8af465db | 2546 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
a08b17be AH |
2547 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
2548 | mmc_power_off(host); | |
2549 | else | |
4a065193 | 2550 | mmc_power_up(host, host->ocr_avail); |
740a221e | 2551 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2552 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2553 | } |
2554 | ||
b93931a6 | 2555 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2556 | { |
3b91e550 | 2557 | #ifdef CONFIG_MMC_DEBUG |
1efd48b3 PO |
2558 | unsigned long flags; |
2559 | spin_lock_irqsave(&host->lock, flags); | |
3b91e550 | 2560 | host->removed = 1; |
1efd48b3 | 2561 | spin_unlock_irqrestore(&host->lock, flags); |
3b91e550 | 2562 | #endif |
740a221e AH |
2563 | if (host->slot.cd_irq >= 0) |
2564 | disable_irq(host->slot.cd_irq); | |
3b91e550 | 2565 | |
d9adcc12 | 2566 | host->rescan_disable = 1; |
d9bcbf34 | 2567 | cancel_delayed_work_sync(&host->detect); |
3b91e550 PO |
2568 | mmc_flush_scheduled_work(); |
2569 | ||
da68c4eb NP |
2570 | /* clear pm flags now and let card drivers set them as needed */ |
2571 | host->pm_flags = 0; | |
2572 | ||
7ea239d9 PO |
2573 | mmc_bus_get(host); |
2574 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2575 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2576 | host->bus_ops->remove(host); |
7ea239d9 PO |
2577 | mmc_claim_host(host); |
2578 | mmc_detach_bus(host); | |
7f7e4129 | 2579 | mmc_power_off(host); |
7ea239d9 | 2580 | mmc_release_host(host); |
53509f0f DK |
2581 | mmc_bus_put(host); |
2582 | return; | |
1da177e4 | 2583 | } |
7ea239d9 PO |
2584 | mmc_bus_put(host); |
2585 | ||
2586 | BUG_ON(host->card); | |
1da177e4 LT |
2587 | |
2588 | mmc_power_off(host); | |
2589 | } | |
2590 | ||
12ae637f | 2591 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2592 | { |
12ae637f OBC |
2593 | int ret = 0; |
2594 | ||
bb9cab94 DD |
2595 | #ifdef CONFIG_MMC_DEBUG |
2596 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); | |
2597 | #endif | |
2598 | ||
eae1aeee AH |
2599 | mmc_bus_get(host); |
2600 | ||
5601aaf7 | 2601 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2602 | mmc_bus_put(host); |
12ae637f | 2603 | return -EINVAL; |
eae1aeee AH |
2604 | } |
2605 | ||
2606 | if (host->bus_ops->power_save) | |
12ae637f | 2607 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2608 | |
2609 | mmc_bus_put(host); | |
2610 | ||
2611 | mmc_power_off(host); | |
12ae637f OBC |
2612 | |
2613 | return ret; | |
eae1aeee AH |
2614 | } |
2615 | EXPORT_SYMBOL(mmc_power_save_host); | |
2616 | ||
12ae637f | 2617 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2618 | { |
12ae637f OBC |
2619 | int ret; |
2620 | ||
bb9cab94 DD |
2621 | #ifdef CONFIG_MMC_DEBUG |
2622 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); | |
2623 | #endif | |
2624 | ||
eae1aeee AH |
2625 | mmc_bus_get(host); |
2626 | ||
5601aaf7 | 2627 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2628 | mmc_bus_put(host); |
12ae637f | 2629 | return -EINVAL; |
eae1aeee AH |
2630 | } |
2631 | ||
69041150 | 2632 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2633 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2634 | |
2635 | mmc_bus_put(host); | |
12ae637f OBC |
2636 | |
2637 | return ret; | |
eae1aeee AH |
2638 | } |
2639 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2640 | ||
881d1c25 SJ |
2641 | /* |
2642 | * Flush the cache to the non-volatile storage. | |
2643 | */ | |
2644 | int mmc_flush_cache(struct mmc_card *card) | |
2645 | { | |
881d1c25 SJ |
2646 | int err = 0; |
2647 | ||
881d1c25 SJ |
2648 | if (mmc_card_mmc(card) && |
2649 | (card->ext_csd.cache_size > 0) && | |
2650 | (card->ext_csd.cache_ctrl & 1)) { | |
2651 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
2652 | EXT_CSD_FLUSH_CACHE, 1, 0); | |
2653 | if (err) | |
2654 | pr_err("%s: cache flush error %d\n", | |
2655 | mmc_hostname(card->host), err); | |
2656 | } | |
2657 | ||
2658 | return err; | |
2659 | } | |
2660 | EXPORT_SYMBOL(mmc_flush_cache); | |
2661 | ||
1da177e4 LT |
2662 | #ifdef CONFIG_PM |
2663 | ||
4c2ef25f ML |
2664 | /* Do the card removal on suspend if card is assumed removeable |
2665 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2666 | to sync the card. | |
2667 | */ | |
2668 | int mmc_pm_notify(struct notifier_block *notify_block, | |
2669 | unsigned long mode, void *unused) | |
2670 | { | |
2671 | struct mmc_host *host = container_of( | |
2672 | notify_block, struct mmc_host, pm_notify); | |
2673 | unsigned long flags; | |
810caddb | 2674 | int err = 0; |
4c2ef25f ML |
2675 | |
2676 | switch (mode) { | |
2677 | case PM_HIBERNATION_PREPARE: | |
2678 | case PM_SUSPEND_PREPARE: | |
184af16b | 2679 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2680 | spin_lock_irqsave(&host->lock, flags); |
2681 | host->rescan_disable = 1; | |
2682 | spin_unlock_irqrestore(&host->lock, flags); | |
2683 | cancel_delayed_work_sync(&host->detect); | |
2684 | ||
810caddb UH |
2685 | if (!host->bus_ops) |
2686 | break; | |
2687 | ||
2688 | /* Validate prerequisites for suspend */ | |
2689 | if (host->bus_ops->pre_suspend) | |
2690 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2691 | if (!err) |
4c2ef25f ML |
2692 | break; |
2693 | ||
0db13fc2 | 2694 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2695 | host->bus_ops->remove(host); |
0db13fc2 | 2696 | mmc_claim_host(host); |
4c2ef25f | 2697 | mmc_detach_bus(host); |
7f7e4129 | 2698 | mmc_power_off(host); |
4c2ef25f ML |
2699 | mmc_release_host(host); |
2700 | host->pm_flags = 0; | |
2701 | break; | |
2702 | ||
2703 | case PM_POST_SUSPEND: | |
2704 | case PM_POST_HIBERNATION: | |
274476f8 | 2705 | case PM_POST_RESTORE: |
4c2ef25f ML |
2706 | |
2707 | spin_lock_irqsave(&host->lock, flags); | |
2708 | host->rescan_disable = 0; | |
2709 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2710 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2711 | |
2712 | } | |
2713 | ||
2714 | return 0; | |
2715 | } | |
1da177e4 LT |
2716 | #endif |
2717 | ||
2220eedf KD |
2718 | /** |
2719 | * mmc_init_context_info() - init synchronization context | |
2720 | * @host: mmc host | |
2721 | * | |
2722 | * Init struct context_info needed to implement asynchronous | |
2723 | * request mechanism, used by mmc core, host driver and mmc requests | |
2724 | * supplier. | |
2725 | */ | |
2726 | void mmc_init_context_info(struct mmc_host *host) | |
2727 | { | |
2728 | spin_lock_init(&host->context_info.lock); | |
2729 | host->context_info.is_new_req = false; | |
2730 | host->context_info.is_done_rcv = false; | |
2731 | host->context_info.is_waiting_last_req = false; | |
2732 | init_waitqueue_head(&host->context_info.wait); | |
2733 | } | |
2734 | ||
ffce2e7e PO |
2735 | static int __init mmc_init(void) |
2736 | { | |
2737 | int ret; | |
2738 | ||
0d9ee5b2 | 2739 | workqueue = alloc_ordered_workqueue("kmmcd", 0); |
ffce2e7e PO |
2740 | if (!workqueue) |
2741 | return -ENOMEM; | |
2742 | ||
2743 | ret = mmc_register_bus(); | |
e29a7d73 PO |
2744 | if (ret) |
2745 | goto destroy_workqueue; | |
2746 | ||
2747 | ret = mmc_register_host_class(); | |
2748 | if (ret) | |
2749 | goto unregister_bus; | |
2750 | ||
2751 | ret = sdio_register_bus(); | |
2752 | if (ret) | |
2753 | goto unregister_host_class; | |
2754 | ||
2755 | return 0; | |
2756 | ||
2757 | unregister_host_class: | |
2758 | mmc_unregister_host_class(); | |
2759 | unregister_bus: | |
2760 | mmc_unregister_bus(); | |
2761 | destroy_workqueue: | |
2762 | destroy_workqueue(workqueue); | |
2763 | ||
ffce2e7e PO |
2764 | return ret; |
2765 | } | |
2766 | ||
2767 | static void __exit mmc_exit(void) | |
2768 | { | |
e29a7d73 | 2769 | sdio_unregister_bus(); |
ffce2e7e PO |
2770 | mmc_unregister_host_class(); |
2771 | mmc_unregister_bus(); | |
2772 | destroy_workqueue(workqueue); | |
2773 | } | |
2774 | ||
26074962 | 2775 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2776 | module_exit(mmc_exit); |
2777 | ||
1da177e4 | 2778 | MODULE_LICENSE("GPL"); |