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 | |
7962fc37 BW |
39 | #define CREATE_TRACE_POINTS |
40 | #include <trace/events/mmc.h> | |
41 | ||
aaac1b47 | 42 | #include "core.h" |
4facdde1 | 43 | #include "card.h" |
ffce2e7e PO |
44 | #include "bus.h" |
45 | #include "host.h" | |
e29a7d73 | 46 | #include "sdio_bus.h" |
3aa8793f | 47 | #include "pwrseq.h" |
da7fbe58 PO |
48 | |
49 | #include "mmc_ops.h" | |
50 | #include "sd_ops.h" | |
5c4e6f13 | 51 | #include "sdio_ops.h" |
1da177e4 | 52 | |
8fee476b TR |
53 | /* If the device is not responding */ |
54 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ | |
55 | ||
950d56ac JC |
56 | /* |
57 | * Background operations can take a long time, depending on the housekeeping | |
58 | * operations the card has to perform. | |
59 | */ | |
60 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ | |
61 | ||
12182aff UH |
62 | /* The max erase timeout, used when host->max_busy_timeout isn't specified */ |
63 | #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ | |
64 | ||
fa550189 | 65 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 66 | |
af517150 DB |
67 | /* |
68 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
69 | * performance cost, and for other reasons may not always be desired. | |
70 | * So we allow it it to be disabled. | |
71 | */ | |
90ab5ee9 | 72 | bool use_spi_crc = 1; |
af517150 DB |
73 | module_param(use_spi_crc, bool, 0); |
74 | ||
ffce2e7e PO |
75 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
76 | unsigned long delay) | |
77 | { | |
520bd7a8 UH |
78 | /* |
79 | * We use the system_freezable_wq, because of two reasons. | |
80 | * First, it allows several works (not the same work item) to be | |
81 | * executed simultaneously. Second, the queue becomes frozen when | |
82 | * userspace becomes frozen during system PM. | |
83 | */ | |
84 | return queue_delayed_work(system_freezable_wq, work, delay); | |
ffce2e7e PO |
85 | } |
86 | ||
1b676f70 PF |
87 | #ifdef CONFIG_FAIL_MMC_REQUEST |
88 | ||
89 | /* | |
90 | * Internal function. Inject random data errors. | |
91 | * If mmc_data is NULL no errors are injected. | |
92 | */ | |
93 | static void mmc_should_fail_request(struct mmc_host *host, | |
94 | struct mmc_request *mrq) | |
95 | { | |
96 | struct mmc_command *cmd = mrq->cmd; | |
97 | struct mmc_data *data = mrq->data; | |
98 | static const int data_errors[] = { | |
99 | -ETIMEDOUT, | |
100 | -EILSEQ, | |
101 | -EIO, | |
102 | }; | |
103 | ||
104 | if (!data) | |
105 | return; | |
106 | ||
107 | if (cmd->error || data->error || | |
108 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) | |
109 | return; | |
110 | ||
2e744fcb AM |
111 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
112 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
113 | } |
114 | ||
115 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
116 | ||
117 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
118 | struct mmc_request *mrq) | |
119 | { | |
120 | } | |
121 | ||
122 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
123 | ||
5163af5a AH |
124 | static inline void mmc_complete_cmd(struct mmc_request *mrq) |
125 | { | |
126 | if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) | |
127 | complete_all(&mrq->cmd_completion); | |
128 | } | |
129 | ||
130 | void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) | |
131 | { | |
132 | if (!mrq->cap_cmd_during_tfr) | |
133 | return; | |
134 | ||
135 | mmc_complete_cmd(mrq); | |
136 | ||
137 | pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", | |
138 | mmc_hostname(host), mrq->cmd->opcode); | |
139 | } | |
140 | EXPORT_SYMBOL(mmc_command_done); | |
141 | ||
1da177e4 | 142 | /** |
fe10c6ab RK |
143 | * mmc_request_done - finish processing an MMC request |
144 | * @host: MMC host which completed request | |
145 | * @mrq: MMC request which request | |
1da177e4 LT |
146 | * |
147 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 148 | * their processing of a request. |
1da177e4 LT |
149 | */ |
150 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
151 | { | |
152 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
153 | int err = cmd->error; |
154 | ||
bd11e8bd | 155 | /* Flag re-tuning needed on CRC errors */ |
031277d4 CJ |
156 | if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && |
157 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && | |
158 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || | |
bd11e8bd | 159 | (mrq->data && mrq->data->error == -EILSEQ) || |
031277d4 | 160 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
bd11e8bd AH |
161 | mmc_retune_needed(host); |
162 | ||
af517150 DB |
163 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
164 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
165 | cmd->retries = 0; | |
166 | } | |
167 | ||
5163af5a AH |
168 | if (host->ongoing_mrq == mrq) |
169 | host->ongoing_mrq = NULL; | |
170 | ||
171 | mmc_complete_cmd(mrq); | |
172 | ||
7962fc37 BW |
173 | trace_mmc_request_done(host, mrq); |
174 | ||
d3049504 | 175 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
08a7e1df AH |
176 | /* |
177 | * Request starter must handle retries - see | |
178 | * mmc_wait_for_req_done(). | |
179 | */ | |
180 | if (mrq->done) | |
181 | mrq->done(mrq); | |
e4d21708 | 182 | } else { |
1b676f70 PF |
183 | mmc_should_fail_request(host, mrq); |
184 | ||
5163af5a AH |
185 | if (!host->ongoing_mrq) |
186 | led_trigger_event(host->led, LED_OFF); | |
af8350c7 | 187 | |
fc75b708 AG |
188 | if (mrq->sbc) { |
189 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
190 | mmc_hostname(host), mrq->sbc->opcode, | |
191 | mrq->sbc->error, | |
192 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
193 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
194 | } | |
195 | ||
e4d21708 PO |
196 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
197 | mmc_hostname(host), cmd->opcode, err, | |
198 | cmd->resp[0], cmd->resp[1], | |
199 | cmd->resp[2], cmd->resp[3]); | |
200 | ||
201 | if (mrq->data) { | |
202 | pr_debug("%s: %d bytes transferred: %d\n", | |
203 | mmc_hostname(host), | |
204 | mrq->data->bytes_xfered, mrq->data->error); | |
205 | } | |
206 | ||
207 | if (mrq->stop) { | |
208 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
209 | mmc_hostname(host), mrq->stop->opcode, | |
210 | mrq->stop->error, | |
211 | mrq->stop->resp[0], mrq->stop->resp[1], | |
212 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
213 | } | |
214 | ||
215 | if (mrq->done) | |
216 | mrq->done(mrq); | |
1da177e4 LT |
217 | } |
218 | } | |
219 | ||
220 | EXPORT_SYMBOL(mmc_request_done); | |
221 | ||
90a81489 AH |
222 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
223 | { | |
224 | int err; | |
225 | ||
226 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
227 | err = mmc_retune(host); | |
228 | if (err) { | |
229 | mrq->cmd->error = err; | |
230 | mmc_request_done(host, mrq); | |
231 | return; | |
232 | } | |
233 | ||
5d3f6ef0 HG |
234 | /* |
235 | * For sdio rw commands we must wait for card busy otherwise some | |
236 | * sdio devices won't work properly. | |
237 | */ | |
238 | if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) { | |
239 | int tries = 500; /* Wait aprox 500ms at maximum */ | |
240 | ||
241 | while (host->ops->card_busy(host) && --tries) | |
242 | mmc_delay(1); | |
243 | ||
244 | if (tries == 0) { | |
245 | mrq->cmd->error = -EBUSY; | |
246 | mmc_request_done(host, mrq); | |
247 | return; | |
248 | } | |
249 | } | |
250 | ||
5163af5a AH |
251 | if (mrq->cap_cmd_during_tfr) { |
252 | host->ongoing_mrq = mrq; | |
253 | /* | |
254 | * Retry path could come through here without having waiting on | |
255 | * cmd_completion, so ensure it is reinitialised. | |
256 | */ | |
257 | reinit_completion(&mrq->cmd_completion); | |
258 | } | |
259 | ||
7962fc37 BW |
260 | trace_mmc_request_start(host, mrq); |
261 | ||
90a81489 AH |
262 | host->ops->request(host, mrq); |
263 | } | |
264 | ||
4b67e63f | 265 | static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq) |
1da177e4 | 266 | { |
7b2fd4f2 JC |
267 | if (mrq->sbc) { |
268 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
269 | mmc_hostname(host), mrq->sbc->opcode, | |
270 | mrq->sbc->arg, mrq->sbc->flags); | |
271 | } | |
272 | ||
4b67e63f AH |
273 | if (mrq->cmd) { |
274 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", | |
275 | mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->arg, | |
276 | mrq->cmd->flags); | |
277 | } | |
1da177e4 | 278 | |
e4d21708 PO |
279 | if (mrq->data) { |
280 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
281 | "tsac %d ms nsac %d\n", | |
282 | mmc_hostname(host), mrq->data->blksz, | |
283 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 284 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
285 | mrq->data->timeout_clks); |
286 | } | |
287 | ||
288 | if (mrq->stop) { | |
289 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
290 | mmc_hostname(host), mrq->stop->opcode, | |
291 | mrq->stop->arg, mrq->stop->flags); | |
292 | } | |
4b67e63f AH |
293 | } |
294 | ||
295 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) | |
296 | { | |
297 | #ifdef CONFIG_MMC_DEBUG | |
298 | unsigned int i, sz; | |
299 | struct scatterlist *sg; | |
300 | #endif | |
301 | mmc_retune_hold(host); | |
302 | ||
303 | if (mmc_card_removed(host->card)) | |
304 | return -ENOMEDIUM; | |
305 | ||
306 | mmc_mrq_pr_debug(host, mrq); | |
e4d21708 | 307 | |
f22ee4ed | 308 | WARN_ON(!host->claimed); |
1da177e4 LT |
309 | |
310 | mrq->cmd->error = 0; | |
311 | mrq->cmd->mrq = mrq; | |
cce411e6 AG |
312 | if (mrq->sbc) { |
313 | mrq->sbc->error = 0; | |
314 | mrq->sbc->mrq = mrq; | |
315 | } | |
1da177e4 | 316 | if (mrq->data) { |
6ff897ff SL |
317 | if (mrq->data->blksz > host->max_blk_size || |
318 | mrq->data->blocks > host->max_blk_count || | |
319 | mrq->data->blocks * mrq->data->blksz > host->max_req_size) | |
320 | return -EINVAL; | |
976d9276 PO |
321 | #ifdef CONFIG_MMC_DEBUG |
322 | sz = 0; | |
a84756c5 PO |
323 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
324 | sz += sg->length; | |
6ff897ff SL |
325 | if (sz != mrq->data->blocks * mrq->data->blksz) |
326 | return -EINVAL; | |
976d9276 PO |
327 | #endif |
328 | ||
1da177e4 LT |
329 | mrq->cmd->data = mrq->data; |
330 | mrq->data->error = 0; | |
331 | mrq->data->mrq = mrq; | |
332 | if (mrq->stop) { | |
333 | mrq->data->stop = mrq->stop; | |
334 | mrq->stop->error = 0; | |
335 | mrq->stop->mrq = mrq; | |
336 | } | |
337 | } | |
66c036e0 | 338 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 339 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
340 | |
341 | return 0; | |
1da177e4 LT |
342 | } |
343 | ||
950d56ac JC |
344 | /** |
345 | * mmc_start_bkops - start BKOPS for supported cards | |
346 | * @card: MMC card to start BKOPS | |
347 | * @form_exception: A flag to indicate if this function was | |
348 | * called due to an exception raised by the card | |
349 | * | |
350 | * Start background operations whenever requested. | |
351 | * When the urgent BKOPS bit is set in a R1 command response | |
352 | * then background operations should be started immediately. | |
353 | */ | |
354 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) | |
355 | { | |
356 | int err; | |
357 | int timeout; | |
358 | bool use_busy_signal; | |
359 | ||
0501be64 | 360 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
950d56ac JC |
361 | return; |
362 | ||
363 | err = mmc_read_bkops_status(card); | |
364 | if (err) { | |
365 | pr_err("%s: Failed to read bkops status: %d\n", | |
366 | mmc_hostname(card->host), err); | |
367 | return; | |
368 | } | |
369 | ||
370 | if (!card->ext_csd.raw_bkops_status) | |
371 | return; | |
372 | ||
373 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && | |
374 | from_exception) | |
375 | return; | |
376 | ||
377 | mmc_claim_host(card->host); | |
378 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { | |
379 | timeout = MMC_BKOPS_MAX_TIMEOUT; | |
380 | use_busy_signal = true; | |
381 | } else { | |
382 | timeout = 0; | |
383 | use_busy_signal = false; | |
384 | } | |
385 | ||
66073d86 AH |
386 | mmc_retune_hold(card->host); |
387 | ||
950d56ac | 388 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
aa33ce3c | 389 | EXT_CSD_BKOPS_START, 1, timeout, 0, |
4509f847 | 390 | use_busy_signal, true, false); |
950d56ac JC |
391 | if (err) { |
392 | pr_warn("%s: Error %d starting bkops\n", | |
393 | mmc_hostname(card->host), err); | |
66073d86 | 394 | mmc_retune_release(card->host); |
950d56ac JC |
395 | goto out; |
396 | } | |
397 | ||
398 | /* | |
399 | * For urgent bkops status (LEVEL_2 and more) | |
400 | * bkops executed synchronously, otherwise | |
401 | * the operation is in progress | |
402 | */ | |
403 | if (!use_busy_signal) | |
404 | mmc_card_set_doing_bkops(card); | |
66073d86 AH |
405 | else |
406 | mmc_retune_release(card->host); | |
950d56ac JC |
407 | out: |
408 | mmc_release_host(card->host); | |
409 | } | |
410 | EXPORT_SYMBOL(mmc_start_bkops); | |
411 | ||
2220eedf KD |
412 | /* |
413 | * mmc_wait_data_done() - done callback for data request | |
414 | * @mrq: done data request | |
415 | * | |
416 | * Wakes up mmc context, passed as a callback to host controller driver | |
417 | */ | |
418 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
419 | { | |
71f8a4b8 JF |
420 | struct mmc_context_info *context_info = &mrq->host->context_info; |
421 | ||
422 | context_info->is_done_rcv = true; | |
423 | wake_up_interruptible(&context_info->wait); | |
2220eedf KD |
424 | } |
425 | ||
1da177e4 LT |
426 | static void mmc_wait_done(struct mmc_request *mrq) |
427 | { | |
aa8b683a PF |
428 | complete(&mrq->completion); |
429 | } | |
430 | ||
5163af5a AH |
431 | static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) |
432 | { | |
433 | struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); | |
434 | ||
435 | /* | |
436 | * If there is an ongoing transfer, wait for the command line to become | |
437 | * available. | |
438 | */ | |
439 | if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) | |
440 | wait_for_completion(&ongoing_mrq->cmd_completion); | |
441 | } | |
442 | ||
2220eedf KD |
443 | /* |
444 | *__mmc_start_data_req() - starts data request | |
445 | * @host: MMC host to start the request | |
446 | * @mrq: data request to start | |
447 | * | |
448 | * Sets the done callback to be called when request is completed by the card. | |
449 | * Starts data mmc request execution | |
5163af5a AH |
450 | * If an ongoing transfer is already in progress, wait for the command line |
451 | * to become available before sending another command. | |
2220eedf KD |
452 | */ |
453 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
454 | { | |
f100c1c2 AH |
455 | int err; |
456 | ||
5163af5a AH |
457 | mmc_wait_ongoing_tfr_cmd(host); |
458 | ||
2220eedf KD |
459 | mrq->done = mmc_wait_data_done; |
460 | mrq->host = host; | |
f100c1c2 | 461 | |
5163af5a AH |
462 | init_completion(&mrq->cmd_completion); |
463 | ||
f100c1c2 AH |
464 | err = mmc_start_request(host, mrq); |
465 | if (err) { | |
466 | mrq->cmd->error = err; | |
5163af5a | 467 | mmc_complete_cmd(mrq); |
9b844961 | 468 | mmc_wait_data_done(mrq); |
2220eedf | 469 | } |
2220eedf | 470 | |
f100c1c2 | 471 | return err; |
2220eedf KD |
472 | } |
473 | ||
956d9fd5 | 474 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 475 | { |
f100c1c2 AH |
476 | int err; |
477 | ||
5163af5a AH |
478 | mmc_wait_ongoing_tfr_cmd(host); |
479 | ||
aa8b683a PF |
480 | init_completion(&mrq->completion); |
481 | mrq->done = mmc_wait_done; | |
f100c1c2 | 482 | |
5163af5a AH |
483 | init_completion(&mrq->cmd_completion); |
484 | ||
f100c1c2 AH |
485 | err = mmc_start_request(host, mrq); |
486 | if (err) { | |
487 | mrq->cmd->error = err; | |
5163af5a | 488 | mmc_complete_cmd(mrq); |
d3049504 | 489 | complete(&mrq->completion); |
d3049504 | 490 | } |
f100c1c2 AH |
491 | |
492 | return err; | |
aa8b683a PF |
493 | } |
494 | ||
2220eedf KD |
495 | /* |
496 | * mmc_wait_for_data_req_done() - wait for request completed | |
497 | * @host: MMC host to prepare the command. | |
498 | * @mrq: MMC request to wait for | |
499 | * | |
500 | * Blocks MMC context till host controller will ack end of data request | |
501 | * execution or new request notification arrives from the block layer. | |
502 | * Handles command retries. | |
503 | * | |
504 | * Returns enum mmc_blk_status after checking errors. | |
505 | */ | |
8e8b3f51 | 506 | static enum mmc_blk_status mmc_wait_for_data_req_done(struct mmc_host *host, |
15520111 | 507 | struct mmc_request *mrq) |
2220eedf KD |
508 | { |
509 | struct mmc_command *cmd; | |
510 | struct mmc_context_info *context_info = &host->context_info; | |
8e8b3f51 | 511 | enum mmc_blk_status status; |
2220eedf KD |
512 | |
513 | while (1) { | |
514 | wait_event_interruptible(context_info->wait, | |
515 | (context_info->is_done_rcv || | |
516 | context_info->is_new_req)); | |
15520111 | 517 | |
2220eedf KD |
518 | if (context_info->is_done_rcv) { |
519 | context_info->is_done_rcv = false; | |
2220eedf | 520 | cmd = mrq->cmd; |
775a9362 | 521 | |
2220eedf KD |
522 | if (!cmd->error || !cmd->retries || |
523 | mmc_card_removed(host->card)) { | |
8e8b3f51 LW |
524 | status = host->areq->err_check(host->card, |
525 | host->areq); | |
526 | break; /* return status */ | |
2220eedf | 527 | } else { |
90a81489 | 528 | mmc_retune_recheck(host); |
2220eedf KD |
529 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
530 | mmc_hostname(host), | |
531 | cmd->opcode, cmd->error); | |
532 | cmd->retries--; | |
533 | cmd->error = 0; | |
90a81489 | 534 | __mmc_start_request(host, mrq); |
2220eedf KD |
535 | continue; /* wait for done/new event again */ |
536 | } | |
2220eedf | 537 | } |
15520111 AH |
538 | |
539 | return MMC_BLK_NEW_REQUEST; | |
2220eedf | 540 | } |
90a81489 | 541 | mmc_retune_release(host); |
8e8b3f51 | 542 | return status; |
2220eedf KD |
543 | } |
544 | ||
5163af5a | 545 | void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 546 | { |
08a7e1df AH |
547 | struct mmc_command *cmd; |
548 | ||
549 | while (1) { | |
550 | wait_for_completion(&mrq->completion); | |
551 | ||
552 | cmd = mrq->cmd; | |
775a9362 ME |
553 | |
554 | /* | |
555 | * If host has timed out waiting for the sanitize | |
556 | * to complete, card might be still in programming state | |
557 | * so let's try to bring the card out of programming | |
558 | * state. | |
559 | */ | |
560 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
561 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
562 | pr_warn("%s: %s: Interrupted sanitize\n", |
563 | mmc_hostname(host), __func__); | |
775a9362 ME |
564 | cmd->error = 0; |
565 | break; | |
566 | } else { | |
567 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
568 | mmc_hostname(host), __func__); | |
569 | } | |
570 | } | |
d3049504 AH |
571 | if (!cmd->error || !cmd->retries || |
572 | mmc_card_removed(host->card)) | |
08a7e1df AH |
573 | break; |
574 | ||
90a81489 AH |
575 | mmc_retune_recheck(host); |
576 | ||
08a7e1df AH |
577 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
578 | mmc_hostname(host), cmd->opcode, cmd->error); | |
579 | cmd->retries--; | |
580 | cmd->error = 0; | |
90a81489 | 581 | __mmc_start_request(host, mrq); |
08a7e1df | 582 | } |
90a81489 AH |
583 | |
584 | mmc_retune_release(host); | |
aa8b683a | 585 | } |
5163af5a AH |
586 | EXPORT_SYMBOL(mmc_wait_for_req_done); |
587 | ||
588 | /** | |
589 | * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done | |
590 | * @host: MMC host | |
591 | * @mrq: MMC request | |
592 | * | |
593 | * mmc_is_req_done() is used with requests that have | |
594 | * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after | |
595 | * starting a request and before waiting for it to complete. That is, | |
596 | * either in between calls to mmc_start_req(), or after mmc_wait_for_req() | |
597 | * and before mmc_wait_for_req_done(). If it is called at other times the | |
598 | * result is not meaningful. | |
599 | */ | |
600 | bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) | |
601 | { | |
602 | if (host->areq) | |
603 | return host->context_info.is_done_rcv; | |
604 | else | |
605 | return completion_done(&mrq->completion); | |
606 | } | |
607 | EXPORT_SYMBOL(mmc_is_req_done); | |
aa8b683a PF |
608 | |
609 | /** | |
610 | * mmc_pre_req - Prepare for a new request | |
611 | * @host: MMC host to prepare command | |
612 | * @mrq: MMC request to prepare for | |
aa8b683a PF |
613 | * |
614 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
615 | * host prepare for the new request. Preparation of a request may be | |
616 | * performed while another request is running on the host. | |
617 | */ | |
d3c6aac3 | 618 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 619 | { |
9eadcc05 | 620 | if (host->ops->pre_req) |
d3c6aac3 | 621 | host->ops->pre_req(host, mrq); |
aa8b683a PF |
622 | } |
623 | ||
624 | /** | |
625 | * mmc_post_req - Post process a completed request | |
626 | * @host: MMC host to post process command | |
627 | * @mrq: MMC request to post process for | |
628 | * @err: Error, if non zero, clean up any resources made in pre_req | |
629 | * | |
630 | * Let the host post process a completed request. Post processing of | |
631 | * a request may be performed while another reuqest is running. | |
632 | */ | |
633 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
634 | int err) | |
635 | { | |
9eadcc05 | 636 | if (host->ops->post_req) |
aa8b683a | 637 | host->ops->post_req(host, mrq, err); |
1da177e4 LT |
638 | } |
639 | ||
37dac068 LW |
640 | /** |
641 | * mmc_finalize_areq() - finalize an asynchronous request | |
642 | * @host: MMC host to finalize any ongoing request on | |
643 | * | |
644 | * Returns the status of the ongoing asynchronous request, but | |
645 | * MMC_BLK_SUCCESS if no request was going on. | |
646 | */ | |
647 | static enum mmc_blk_status mmc_finalize_areq(struct mmc_host *host) | |
648 | { | |
649 | enum mmc_blk_status status; | |
650 | ||
651 | if (!host->areq) | |
652 | return MMC_BLK_SUCCESS; | |
653 | ||
654 | status = mmc_wait_for_data_req_done(host, host->areq->mrq); | |
655 | if (status == MMC_BLK_NEW_REQUEST) | |
656 | return status; | |
657 | ||
658 | /* | |
659 | * Check BKOPS urgency for each R1 response | |
660 | */ | |
661 | if (host->card && mmc_card_mmc(host->card) && | |
662 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
663 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
664 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { | |
665 | mmc_start_bkops(host->card, true); | |
666 | } | |
667 | ||
668 | return status; | |
669 | } | |
670 | ||
aa8b683a | 671 | /** |
c3399ef5 | 672 | * mmc_start_areq - start an asynchronous request |
aa8b683a | 673 | * @host: MMC host to start command |
c3399ef5 LW |
674 | * @areq: asynchronous request to start |
675 | * @ret_stat: out parameter for status | |
aa8b683a PF |
676 | * |
677 | * Start a new MMC custom command request for a host. | |
678 | * If there is on ongoing async request wait for completion | |
679 | * of that request and start the new one and return. | |
680 | * Does not wait for the new request to complete. | |
681 | * | |
682 | * Returns the completed request, NULL in case of none completed. | |
683 | * Wait for the an ongoing request (previoulsy started) to complete and | |
684 | * return the completed request. If there is no ongoing request, NULL | |
685 | * is returned without waiting. NULL is not an error condition. | |
686 | */ | |
c3399ef5 LW |
687 | struct mmc_async_req *mmc_start_areq(struct mmc_host *host, |
688 | struct mmc_async_req *areq, | |
689 | enum mmc_blk_status *ret_stat) | |
aa8b683a | 690 | { |
37dac068 | 691 | enum mmc_blk_status status; |
956d9fd5 | 692 | int start_err = 0; |
aa8b683a PF |
693 | struct mmc_async_req *data = host->areq; |
694 | ||
695 | /* Prepare a new request */ | |
696 | if (areq) | |
d3c6aac3 | 697 | mmc_pre_req(host, areq->mrq); |
aa8b683a | 698 | |
37dac068 LW |
699 | /* Finalize previous request */ |
700 | status = mmc_finalize_areq(host); | |
701 | ||
702 | /* The previous request is still going on... */ | |
703 | if (status == MMC_BLK_NEW_REQUEST) { | |
704 | if (ret_stat) | |
705 | *ret_stat = status; | |
706 | return NULL; | |
aa8b683a PF |
707 | } |
708 | ||
37dac068 | 709 | /* Fine so far, start the new request! */ |
8e8b3f51 | 710 | if (status == MMC_BLK_SUCCESS && areq) |
2220eedf | 711 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a | 712 | |
37dac068 | 713 | /* Postprocess the old request at this point */ |
aa8b683a PF |
714 | if (host->areq) |
715 | mmc_post_req(host, host->areq->mrq, 0); | |
716 | ||
37dac068 | 717 | /* Cancel a prepared request if it was not started. */ |
8e8b3f51 | 718 | if ((status != MMC_BLK_SUCCESS || start_err) && areq) |
f5c2758f | 719 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 | 720 | |
8e8b3f51 | 721 | if (status != MMC_BLK_SUCCESS) |
956d9fd5 UH |
722 | host->areq = NULL; |
723 | else | |
724 | host->areq = areq; | |
725 | ||
8e8b3f51 LW |
726 | if (ret_stat) |
727 | *ret_stat = status; | |
aa8b683a PF |
728 | return data; |
729 | } | |
c3399ef5 | 730 | EXPORT_SYMBOL(mmc_start_areq); |
aa8b683a | 731 | |
67a61c48 PO |
732 | /** |
733 | * mmc_wait_for_req - start a request and wait for completion | |
734 | * @host: MMC host to start command | |
735 | * @mrq: MMC request to start | |
736 | * | |
737 | * Start a new MMC custom command request for a host, and wait | |
5163af5a AH |
738 | * for the command to complete. In the case of 'cap_cmd_during_tfr' |
739 | * requests, the transfer is ongoing and the caller can issue further | |
740 | * commands that do not use the data lines, and then wait by calling | |
741 | * mmc_wait_for_req_done(). | |
742 | * Does not attempt to parse the response. | |
67a61c48 PO |
743 | */ |
744 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 745 | { |
aa8b683a | 746 | __mmc_start_req(host, mrq); |
5163af5a AH |
747 | |
748 | if (!mrq->cap_cmd_during_tfr) | |
749 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 750 | } |
1da177e4 LT |
751 | EXPORT_SYMBOL(mmc_wait_for_req); |
752 | ||
eb0d8f13 JC |
753 | /** |
754 | * mmc_interrupt_hpi - Issue for High priority Interrupt | |
755 | * @card: the MMC card associated with the HPI transfer | |
756 | * | |
757 | * Issued High Priority Interrupt, and check for card status | |
950d56ac | 758 | * until out-of prg-state. |
eb0d8f13 JC |
759 | */ |
760 | int mmc_interrupt_hpi(struct mmc_card *card) | |
761 | { | |
762 | int err; | |
763 | u32 status; | |
6af9e96e | 764 | unsigned long prg_wait; |
eb0d8f13 | 765 | |
eb0d8f13 JC |
766 | if (!card->ext_csd.hpi_en) { |
767 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); | |
768 | return 1; | |
769 | } | |
770 | ||
771 | mmc_claim_host(card->host); | |
772 | err = mmc_send_status(card, &status); | |
773 | if (err) { | |
774 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); | |
775 | goto out; | |
776 | } | |
777 | ||
6af9e96e V |
778 | switch (R1_CURRENT_STATE(status)) { |
779 | case R1_STATE_IDLE: | |
780 | case R1_STATE_READY: | |
781 | case R1_STATE_STBY: | |
211d4fe5 | 782 | case R1_STATE_TRAN: |
6af9e96e | 783 | /* |
211d4fe5 | 784 | * In idle and transfer states, HPI is not needed and the caller |
6af9e96e V |
785 | * can issue the next intended command immediately |
786 | */ | |
787 | goto out; | |
788 | case R1_STATE_PRG: | |
789 | break; | |
790 | default: | |
791 | /* In all other states, it's illegal to issue HPI */ | |
792 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", | |
793 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); | |
794 | err = -EINVAL; | |
795 | goto out; | |
796 | } | |
797 | ||
798 | err = mmc_send_hpi_cmd(card, &status); | |
799 | if (err) | |
800 | goto out; | |
801 | ||
802 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); | |
803 | do { | |
804 | err = mmc_send_status(card, &status); | |
805 | ||
806 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) | |
807 | break; | |
808 | if (time_after(jiffies, prg_wait)) | |
809 | err = -ETIMEDOUT; | |
810 | } while (!err); | |
eb0d8f13 JC |
811 | |
812 | out: | |
813 | mmc_release_host(card->host); | |
814 | return err; | |
815 | } | |
816 | EXPORT_SYMBOL(mmc_interrupt_hpi); | |
817 | ||
1da177e4 LT |
818 | /** |
819 | * mmc_wait_for_cmd - start a command and wait for completion | |
820 | * @host: MMC host to start command | |
821 | * @cmd: MMC command to start | |
822 | * @retries: maximum number of retries | |
823 | * | |
824 | * Start a new MMC command for a host, and wait for the command | |
825 | * to complete. Return any error that occurred while the command | |
826 | * was executing. Do not attempt to parse the response. | |
827 | */ | |
828 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
829 | { | |
c7836d15 | 830 | struct mmc_request mrq = {}; |
1da177e4 | 831 | |
d84075c8 | 832 | WARN_ON(!host->claimed); |
1da177e4 | 833 | |
1da177e4 LT |
834 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
835 | cmd->retries = retries; | |
836 | ||
837 | mrq.cmd = cmd; | |
838 | cmd->data = NULL; | |
839 | ||
840 | mmc_wait_for_req(host, &mrq); | |
841 | ||
842 | return cmd->error; | |
843 | } | |
844 | ||
845 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
846 | ||
950d56ac JC |
847 | /** |
848 | * mmc_stop_bkops - stop ongoing BKOPS | |
849 | * @card: MMC card to check BKOPS | |
850 | * | |
851 | * Send HPI command to stop ongoing background operations to | |
852 | * allow rapid servicing of foreground operations, e.g. read/ | |
853 | * writes. Wait until the card comes out of the programming state | |
854 | * to avoid errors in servicing read/write requests. | |
855 | */ | |
856 | int mmc_stop_bkops(struct mmc_card *card) | |
857 | { | |
858 | int err = 0; | |
859 | ||
950d56ac JC |
860 | err = mmc_interrupt_hpi(card); |
861 | ||
862 | /* | |
863 | * If err is EINVAL, we can't issue an HPI. | |
864 | * It should complete the BKOPS. | |
865 | */ | |
866 | if (!err || (err == -EINVAL)) { | |
867 | mmc_card_clr_doing_bkops(card); | |
66073d86 | 868 | mmc_retune_release(card->host); |
950d56ac JC |
869 | err = 0; |
870 | } | |
871 | ||
872 | return err; | |
873 | } | |
874 | EXPORT_SYMBOL(mmc_stop_bkops); | |
875 | ||
876 | int mmc_read_bkops_status(struct mmc_card *card) | |
877 | { | |
878 | int err; | |
879 | u8 *ext_csd; | |
880 | ||
950d56ac | 881 | mmc_claim_host(card->host); |
b2cada73 | 882 | err = mmc_get_ext_csd(card, &ext_csd); |
950d56ac JC |
883 | mmc_release_host(card->host); |
884 | if (err) | |
b2cada73 | 885 | return err; |
950d56ac JC |
886 | |
887 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; | |
888 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; | |
950d56ac | 889 | kfree(ext_csd); |
b2cada73 | 890 | return 0; |
950d56ac JC |
891 | } |
892 | EXPORT_SYMBOL(mmc_read_bkops_status); | |
893 | ||
d773d725 RK |
894 | /** |
895 | * mmc_set_data_timeout - set the timeout for a data command | |
896 | * @data: data phase for command | |
897 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
898 | * |
899 | * Computes the data timeout parameters according to the | |
900 | * correct algorithm given the card type. | |
d773d725 | 901 | */ |
b146d26a | 902 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
903 | { |
904 | unsigned int mult; | |
905 | ||
e6f918bf PO |
906 | /* |
907 | * SDIO cards only define an upper 1 s limit on access. | |
908 | */ | |
909 | if (mmc_card_sdio(card)) { | |
910 | data->timeout_ns = 1000000000; | |
911 | data->timeout_clks = 0; | |
912 | return; | |
913 | } | |
914 | ||
d773d725 RK |
915 | /* |
916 | * SD cards use a 100 multiplier rather than 10 | |
917 | */ | |
918 | mult = mmc_card_sd(card) ? 100 : 10; | |
919 | ||
920 | /* | |
921 | * Scale up the multiplier (and therefore the timeout) by | |
922 | * the r2w factor for writes. | |
923 | */ | |
b146d26a | 924 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
925 | mult <<= card->csd.r2w_factor; |
926 | ||
927 | data->timeout_ns = card->csd.tacc_ns * mult; | |
928 | data->timeout_clks = card->csd.tacc_clks * mult; | |
929 | ||
930 | /* | |
931 | * SD cards also have an upper limit on the timeout. | |
932 | */ | |
933 | if (mmc_card_sd(card)) { | |
934 | unsigned int timeout_us, limit_us; | |
935 | ||
936 | timeout_us = data->timeout_ns / 1000; | |
9eadcc05 | 937 | if (card->host->ios.clock) |
e9b86841 | 938 | timeout_us += data->timeout_clks * 1000 / |
9eadcc05 | 939 | (card->host->ios.clock / 1000); |
d773d725 | 940 | |
b146d26a | 941 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 942 | /* |
3bdc9ba8 PW |
943 | * The MMC spec "It is strongly recommended |
944 | * for hosts to implement more than 500ms | |
945 | * timeout value even if the card indicates | |
946 | * the 250ms maximum busy length." Even the | |
947 | * previous value of 300ms is known to be | |
948 | * insufficient for some cards. | |
493890e7 | 949 | */ |
3bdc9ba8 | 950 | limit_us = 3000000; |
d773d725 RK |
951 | else |
952 | limit_us = 100000; | |
953 | ||
fba68bd2 PL |
954 | /* |
955 | * SDHC cards always use these fixed values. | |
956 | */ | |
957 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
958 | data->timeout_ns = limit_us * 1000; |
959 | data->timeout_clks = 0; | |
960 | } | |
f7bf11a3 SW |
961 | |
962 | /* assign limit value if invalid */ | |
963 | if (timeout_us == 0) | |
964 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 965 | } |
6de5fc9c SNX |
966 | |
967 | /* | |
968 | * Some cards require longer data read timeout than indicated in CSD. | |
969 | * Address this by setting the read timeout to a "reasonably high" | |
32ecd320 | 970 | * value. For the cards tested, 600ms has proven enough. If necessary, |
6de5fc9c SNX |
971 | * this value can be increased if other problematic cards require this. |
972 | */ | |
973 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
32ecd320 | 974 | data->timeout_ns = 600000000; |
6de5fc9c SNX |
975 | data->timeout_clks = 0; |
976 | } | |
977 | ||
c0c88871 WM |
978 | /* |
979 | * Some cards need very high timeouts if driven in SPI mode. | |
980 | * The worst observed timeout was 900ms after writing a | |
981 | * continuous stream of data until the internal logic | |
982 | * overflowed. | |
983 | */ | |
984 | if (mmc_host_is_spi(card->host)) { | |
985 | if (data->flags & MMC_DATA_WRITE) { | |
986 | if (data->timeout_ns < 1000000000) | |
987 | data->timeout_ns = 1000000000; /* 1s */ | |
988 | } else { | |
989 | if (data->timeout_ns < 100000000) | |
990 | data->timeout_ns = 100000000; /* 100ms */ | |
991 | } | |
992 | } | |
d773d725 RK |
993 | } |
994 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
995 | ||
ad3868b2 PO |
996 | /** |
997 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
998 | * @card: the MMC card associated with the data transfer | |
999 | * @sz: original transfer size | |
1000 | * | |
1001 | * Pads the original data size with a number of extra bytes in | |
1002 | * order to avoid controller bugs and/or performance hits | |
1003 | * (e.g. some controllers revert to PIO for certain sizes). | |
1004 | * | |
1005 | * Returns the improved size, which might be unmodified. | |
1006 | * | |
1007 | * Note that this function is only relevant when issuing a | |
1008 | * single scatter gather entry. | |
1009 | */ | |
1010 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
1011 | { | |
1012 | /* | |
1013 | * FIXME: We don't have a system for the controller to tell | |
1014 | * the core about its problems yet, so for now we just 32-bit | |
1015 | * align the size. | |
1016 | */ | |
1017 | sz = ((sz + 3) / 4) * 4; | |
1018 | ||
1019 | return sz; | |
1020 | } | |
1021 | EXPORT_SYMBOL(mmc_align_data_size); | |
1022 | ||
1da177e4 | 1023 | /** |
2342f332 | 1024 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 1025 | * @host: mmc host to claim |
2342f332 | 1026 | * @abort: whether or not the operation should be aborted |
1da177e4 | 1027 | * |
2342f332 NP |
1028 | * Claim a host for a set of operations. If @abort is non null and |
1029 | * dereference a non-zero value then this will return prematurely with | |
1030 | * that non-zero value without acquiring the lock. Returns zero | |
1031 | * with the lock held otherwise. | |
1da177e4 | 1032 | */ |
2342f332 | 1033 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
1034 | { |
1035 | DECLARE_WAITQUEUE(wait, current); | |
1036 | unsigned long flags; | |
2342f332 | 1037 | int stop; |
9250aea7 | 1038 | bool pm = false; |
1da177e4 | 1039 | |
cf795bfb PO |
1040 | might_sleep(); |
1041 | ||
1da177e4 LT |
1042 | add_wait_queue(&host->wq, &wait); |
1043 | spin_lock_irqsave(&host->lock, flags); | |
1044 | while (1) { | |
1045 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 1046 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 1047 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
1048 | break; |
1049 | spin_unlock_irqrestore(&host->lock, flags); | |
1050 | schedule(); | |
1051 | spin_lock_irqsave(&host->lock, flags); | |
1052 | } | |
1053 | set_current_state(TASK_RUNNING); | |
319a3f14 | 1054 | if (!stop) { |
2342f332 | 1055 | host->claimed = 1; |
319a3f14 AH |
1056 | host->claimer = current; |
1057 | host->claim_cnt += 1; | |
9250aea7 UH |
1058 | if (host->claim_cnt == 1) |
1059 | pm = true; | |
319a3f14 | 1060 | } else |
2342f332 | 1061 | wake_up(&host->wq); |
1da177e4 LT |
1062 | spin_unlock_irqrestore(&host->lock, flags); |
1063 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
1064 | |
1065 | if (pm) | |
1066 | pm_runtime_get_sync(mmc_dev(host)); | |
1067 | ||
2342f332 | 1068 | return stop; |
1da177e4 | 1069 | } |
2342f332 | 1070 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 1071 | |
ab1efd27 | 1072 | /** |
907d2e7c | 1073 | * mmc_release_host - release a host |
ab1efd27 UH |
1074 | * @host: mmc host to release |
1075 | * | |
907d2e7c AH |
1076 | * Release a MMC host, allowing others to claim the host |
1077 | * for their operations. | |
ab1efd27 | 1078 | */ |
907d2e7c | 1079 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
1080 | { |
1081 | unsigned long flags; | |
1082 | ||
907d2e7c AH |
1083 | WARN_ON(!host->claimed); |
1084 | ||
8ea926b2 | 1085 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
1086 | if (--host->claim_cnt) { |
1087 | /* Release for nested claim */ | |
1088 | spin_unlock_irqrestore(&host->lock, flags); | |
1089 | } else { | |
1090 | host->claimed = 0; | |
1091 | host->claimer = NULL; | |
1092 | spin_unlock_irqrestore(&host->lock, flags); | |
1093 | wake_up(&host->wq); | |
9250aea7 UH |
1094 | pm_runtime_mark_last_busy(mmc_dev(host)); |
1095 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 1096 | } |
8ea926b2 | 1097 | } |
1da177e4 LT |
1098 | EXPORT_SYMBOL(mmc_release_host); |
1099 | ||
e94cfef6 UH |
1100 | /* |
1101 | * This is a helper function, which fetches a runtime pm reference for the | |
1102 | * card device and also claims the host. | |
1103 | */ | |
1104 | void mmc_get_card(struct mmc_card *card) | |
1105 | { | |
1106 | pm_runtime_get_sync(&card->dev); | |
1107 | mmc_claim_host(card->host); | |
1108 | } | |
1109 | EXPORT_SYMBOL(mmc_get_card); | |
1110 | ||
1111 | /* | |
1112 | * This is a helper function, which releases the host and drops the runtime | |
1113 | * pm reference for the card device. | |
1114 | */ | |
1115 | void mmc_put_card(struct mmc_card *card) | |
1116 | { | |
1117 | mmc_release_host(card->host); | |
1118 | pm_runtime_mark_last_busy(&card->dev); | |
1119 | pm_runtime_put_autosuspend(&card->dev); | |
1120 | } | |
1121 | EXPORT_SYMBOL(mmc_put_card); | |
1122 | ||
7ea239d9 PO |
1123 | /* |
1124 | * Internal function that does the actual ios call to the host driver, | |
1125 | * optionally printing some debug output. | |
1126 | */ | |
920e70c5 RK |
1127 | static inline void mmc_set_ios(struct mmc_host *host) |
1128 | { | |
1129 | struct mmc_ios *ios = &host->ios; | |
1130 | ||
cd9277c0 PO |
1131 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
1132 | "width %u timing %u\n", | |
920e70c5 RK |
1133 | mmc_hostname(host), ios->clock, ios->bus_mode, |
1134 | ios->power_mode, ios->chip_select, ios->vdd, | |
ed9feec7 | 1135 | 1 << ios->bus_width, ios->timing); |
fba68bd2 | 1136 | |
920e70c5 RK |
1137 | host->ops->set_ios(host, ios); |
1138 | } | |
1139 | ||
7ea239d9 PO |
1140 | /* |
1141 | * Control chip select pin on a host. | |
1142 | */ | |
da7fbe58 | 1143 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 1144 | { |
da7fbe58 PO |
1145 | host->ios.chip_select = mode; |
1146 | mmc_set_ios(host); | |
1da177e4 LT |
1147 | } |
1148 | ||
7ea239d9 PO |
1149 | /* |
1150 | * Sets the host clock to the highest possible frequency that | |
1151 | * is below "hz". | |
1152 | */ | |
9eadcc05 | 1153 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 1154 | { |
6a98f1e8 | 1155 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
1156 | |
1157 | if (hz > host->f_max) | |
1158 | hz = host->f_max; | |
1159 | ||
1160 | host->ios.clock = hz; | |
1161 | mmc_set_ios(host); | |
1162 | } | |
1163 | ||
63e415c6 AH |
1164 | int mmc_execute_tuning(struct mmc_card *card) |
1165 | { | |
1166 | struct mmc_host *host = card->host; | |
1167 | u32 opcode; | |
1168 | int err; | |
1169 | ||
1170 | if (!host->ops->execute_tuning) | |
1171 | return 0; | |
1172 | ||
1173 | if (mmc_card_mmc(card)) | |
1174 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
1175 | else | |
1176 | opcode = MMC_SEND_TUNING_BLOCK; | |
1177 | ||
63e415c6 | 1178 | err = host->ops->execute_tuning(host, opcode); |
63e415c6 AH |
1179 | |
1180 | if (err) | |
07d97d87 RK |
1181 | pr_err("%s: tuning execution failed: %d\n", |
1182 | mmc_hostname(host), err); | |
79d5a65a AH |
1183 | else |
1184 | mmc_retune_enable(host); | |
63e415c6 AH |
1185 | |
1186 | return err; | |
1187 | } | |
1188 | ||
7ea239d9 PO |
1189 | /* |
1190 | * Change the bus mode (open drain/push-pull) of a host. | |
1191 | */ | |
1192 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1193 | { | |
1194 | host->ios.bus_mode = mode; | |
1195 | mmc_set_ios(host); | |
1196 | } | |
1197 | ||
0f8d8ea6 AH |
1198 | /* |
1199 | * Change data bus width of a host. | |
1200 | */ | |
1201 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1202 | { | |
4c4cb171 PR |
1203 | host->ios.bus_width = width; |
1204 | mmc_set_ios(host); | |
0f8d8ea6 AH |
1205 | } |
1206 | ||
2d079c43 JR |
1207 | /* |
1208 | * Set initial state after a power cycle or a hw_reset. | |
1209 | */ | |
1210 | void mmc_set_initial_state(struct mmc_host *host) | |
1211 | { | |
79d5a65a AH |
1212 | mmc_retune_disable(host); |
1213 | ||
2d079c43 JR |
1214 | if (mmc_host_is_spi(host)) |
1215 | host->ios.chip_select = MMC_CS_HIGH; | |
1216 | else | |
1217 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1218 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
1219 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
1220 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 1221 | host->ios.drv_type = 0; |
81ac2af6 SL |
1222 | host->ios.enhanced_strobe = false; |
1223 | ||
1224 | /* | |
1225 | * Make sure we are in non-enhanced strobe mode before we | |
1226 | * actually enable it in ext_csd. | |
1227 | */ | |
1228 | if ((host->caps2 & MMC_CAP2_HS400_ES) && | |
1229 | host->ops->hs400_enhanced_strobe) | |
1230 | host->ops->hs400_enhanced_strobe(host, &host->ios); | |
2d079c43 JR |
1231 | |
1232 | mmc_set_ios(host); | |
1233 | } | |
1234 | ||
86e8286a AV |
1235 | /** |
1236 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1237 | * @vdd: voltage (mV) | |
1238 | * @low_bits: prefer low bits in boundary cases | |
1239 | * | |
1240 | * This function returns the OCR bit number according to the provided @vdd | |
1241 | * value. If conversion is not possible a negative errno value returned. | |
1242 | * | |
1243 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1244 | * on boundary voltages. For example, | |
1245 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1246 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1247 | * | |
1248 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1249 | */ | |
1250 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1251 | { | |
1252 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1253 | int bit; | |
1254 | ||
1255 | if (vdd < 1650 || vdd > 3600) | |
1256 | return -EINVAL; | |
1257 | ||
1258 | if (vdd >= 1650 && vdd <= 1950) | |
1259 | return ilog2(MMC_VDD_165_195); | |
1260 | ||
1261 | if (low_bits) | |
1262 | vdd -= 1; | |
1263 | ||
1264 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1265 | bit = (vdd - 2000) / 100 + 8; | |
1266 | if (bit > max_bit) | |
1267 | return max_bit; | |
1268 | return bit; | |
1269 | } | |
1270 | ||
1271 | /** | |
1272 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1273 | * @vdd_min: minimum voltage value (mV) | |
1274 | * @vdd_max: maximum voltage value (mV) | |
1275 | * | |
1276 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1277 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1278 | * | |
1279 | * Notes wrt boundary cases: | |
1280 | * This function sets the OCR bits for all boundary voltages, for example | |
1281 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1282 | * MMC_VDD_34_35 mask. | |
1283 | */ | |
1284 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1285 | { | |
1286 | u32 mask = 0; | |
1287 | ||
1288 | if (vdd_max < vdd_min) | |
1289 | return 0; | |
1290 | ||
1291 | /* Prefer high bits for the boundary vdd_max values. */ | |
1292 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1293 | if (vdd_max < 0) | |
1294 | return 0; | |
1295 | ||
1296 | /* Prefer low bits for the boundary vdd_min values. */ | |
1297 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1298 | if (vdd_min < 0) | |
1299 | return 0; | |
1300 | ||
1301 | /* Fill the mask, from max bit to min bit. */ | |
1302 | while (vdd_max >= vdd_min) | |
1303 | mask |= 1 << vdd_max--; | |
1304 | ||
1305 | return mask; | |
1306 | } | |
1307 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1308 | ||
6e9e318b HZ |
1309 | #ifdef CONFIG_OF |
1310 | ||
1311 | /** | |
1312 | * mmc_of_parse_voltage - return mask of supported voltages | |
1313 | * @np: The device node need to be parsed. | |
1314 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1315 | * | |
cf925747 RK |
1316 | * Parse the "voltage-ranges" DT property, returning zero if it is not |
1317 | * found, negative errno if the voltage-range specification is invalid, | |
1318 | * or one if the voltage-range is specified and successfully parsed. | |
6e9e318b HZ |
1319 | */ |
1320 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1321 | { | |
1322 | const u32 *voltage_ranges; | |
1323 | int num_ranges, i; | |
1324 | ||
1325 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1326 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
10a16a01 RK |
1327 | if (!voltage_ranges) { |
1328 | pr_debug("%s: voltage-ranges unspecified\n", np->full_name); | |
cf925747 | 1329 | return 0; |
10a16a01 RK |
1330 | } |
1331 | if (!num_ranges) { | |
1332 | pr_err("%s: voltage-ranges empty\n", np->full_name); | |
6e9e318b HZ |
1333 | return -EINVAL; |
1334 | } | |
1335 | ||
1336 | for (i = 0; i < num_ranges; i++) { | |
1337 | const int j = i * 2; | |
1338 | u32 ocr_mask; | |
1339 | ||
1340 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1341 | be32_to_cpu(voltage_ranges[j]), | |
1342 | be32_to_cpu(voltage_ranges[j + 1])); | |
1343 | if (!ocr_mask) { | |
1344 | pr_err("%s: voltage-range #%d is invalid\n", | |
1345 | np->full_name, i); | |
1346 | return -EINVAL; | |
1347 | } | |
1348 | *mask |= ocr_mask; | |
1349 | } | |
1350 | ||
cf925747 | 1351 | return 1; |
6e9e318b HZ |
1352 | } |
1353 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1354 | ||
1355 | #endif /* CONFIG_OF */ | |
1356 | ||
25185f3f SH |
1357 | static int mmc_of_get_func_num(struct device_node *node) |
1358 | { | |
1359 | u32 reg; | |
1360 | int ret; | |
1361 | ||
1362 | ret = of_property_read_u32(node, "reg", ®); | |
1363 | if (ret < 0) | |
1364 | return ret; | |
1365 | ||
1366 | return reg; | |
1367 | } | |
1368 | ||
1369 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1370 | unsigned func_num) | |
1371 | { | |
1372 | struct device_node *node; | |
1373 | ||
1374 | if (!host->parent || !host->parent->of_node) | |
1375 | return NULL; | |
1376 | ||
1377 | for_each_child_of_node(host->parent->of_node, node) { | |
1378 | if (mmc_of_get_func_num(node) == func_num) | |
1379 | return node; | |
1380 | } | |
1381 | ||
1382 | return NULL; | |
1383 | } | |
1384 | ||
5c13941a DB |
1385 | #ifdef CONFIG_REGULATOR |
1386 | ||
310c805e HS |
1387 | /** |
1388 | * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage | |
1389 | * @vdd_bit: OCR bit number | |
1390 | * @min_uV: minimum voltage value (mV) | |
1391 | * @max_uV: maximum voltage value (mV) | |
1392 | * | |
1393 | * This function returns the voltage range according to the provided OCR | |
1394 | * bit number. If conversion is not possible a negative errno value returned. | |
1395 | */ | |
1396 | static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV) | |
1397 | { | |
1398 | int tmp; | |
1399 | ||
1400 | if (!vdd_bit) | |
1401 | return -EINVAL; | |
1402 | ||
1403 | /* | |
1404 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
1405 | * bits this regulator doesn't quite support ... don't | |
1406 | * be too picky, most cards and regulators are OK with | |
1407 | * a 0.1V range goof (it's a small error percentage). | |
1408 | */ | |
1409 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1410 | if (tmp == 0) { | |
1411 | *min_uV = 1650 * 1000; | |
1412 | *max_uV = 1950 * 1000; | |
1413 | } else { | |
1414 | *min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1415 | *max_uV = *min_uV + 100 * 1000; | |
1416 | } | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
5c13941a DB |
1421 | /** |
1422 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1423 | * @supply: regulator to use | |
1424 | * | |
1425 | * This returns either a negative errno, or a mask of voltages that | |
1426 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1427 | * regulator. This would normally be called before registering the | |
1428 | * MMC host adapter. | |
1429 | */ | |
1430 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1431 | { | |
1432 | int result = 0; | |
1433 | int count; | |
1434 | int i; | |
9ed7ca89 JMC |
1435 | int vdd_uV; |
1436 | int vdd_mV; | |
5c13941a DB |
1437 | |
1438 | count = regulator_count_voltages(supply); | |
1439 | if (count < 0) | |
1440 | return count; | |
1441 | ||
1442 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1443 | vdd_uV = regulator_list_voltage(supply, i); |
1444 | if (vdd_uV <= 0) | |
1445 | continue; | |
1446 | ||
1447 | vdd_mV = vdd_uV / 1000; | |
1448 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1449 | } | |
1450 | ||
9ed7ca89 JMC |
1451 | if (!result) { |
1452 | vdd_uV = regulator_get_voltage(supply); | |
1453 | if (vdd_uV <= 0) | |
1454 | return vdd_uV; | |
1455 | ||
1456 | vdd_mV = vdd_uV / 1000; | |
1457 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1458 | } | |
1459 | ||
5c13941a DB |
1460 | return result; |
1461 | } | |
45a6b32e | 1462 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1463 | |
1464 | /** | |
1465 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1466 | * @mmc: the host to regulate |
5c13941a | 1467 | * @supply: regulator to use |
99fc5131 | 1468 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1469 | * |
1470 | * Returns zero on success, else negative errno. | |
1471 | * | |
1472 | * MMC host drivers may use this to enable or disable a regulator using | |
1473 | * a particular supply voltage. This would normally be called from the | |
1474 | * set_ios() method. | |
1475 | */ | |
99fc5131 LW |
1476 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1477 | struct regulator *supply, | |
1478 | unsigned short vdd_bit) | |
5c13941a DB |
1479 | { |
1480 | int result = 0; | |
1481 | int min_uV, max_uV; | |
5c13941a DB |
1482 | |
1483 | if (vdd_bit) { | |
310c805e | 1484 | mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV); |
5c13941a | 1485 | |
ca6429d4 | 1486 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1487 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1488 | result = regulator_enable(supply); |
99fc5131 LW |
1489 | if (!result) |
1490 | mmc->regulator_enabled = true; | |
1491 | } | |
1492 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1493 | result = regulator_disable(supply); |
99fc5131 LW |
1494 | if (result == 0) |
1495 | mmc->regulator_enabled = false; | |
5c13941a DB |
1496 | } |
1497 | ||
99fc5131 LW |
1498 | if (result) |
1499 | dev_err(mmc_dev(mmc), | |
1500 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1501 | return result; |
1502 | } | |
45a6b32e | 1503 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1504 | |
2086f801 DA |
1505 | static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator, |
1506 | int min_uV, int target_uV, | |
1507 | int max_uV) | |
1508 | { | |
1509 | /* | |
1510 | * Check if supported first to avoid errors since we may try several | |
1511 | * signal levels during power up and don't want to show errors. | |
1512 | */ | |
1513 | if (!regulator_is_supported_voltage(regulator, min_uV, max_uV)) | |
1514 | return -EINVAL; | |
1515 | ||
1516 | return regulator_set_voltage_triplet(regulator, min_uV, target_uV, | |
1517 | max_uV); | |
1518 | } | |
1519 | ||
1520 | /** | |
1521 | * mmc_regulator_set_vqmmc - Set VQMMC as per the ios | |
1522 | * | |
1523 | * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible. | |
1524 | * That will match the behavior of old boards where VQMMC and VMMC were supplied | |
1525 | * by the same supply. The Bus Operating conditions for 3.3V signaling in the | |
1526 | * SD card spec also define VQMMC in terms of VMMC. | |
1527 | * If this is not possible we'll try the full 2.7-3.6V of the spec. | |
1528 | * | |
1529 | * For 1.2V and 1.8V signaling we'll try to get as close as possible to the | |
1530 | * requested voltage. This is definitely a good idea for UHS where there's a | |
1531 | * separate regulator on the card that's trying to make 1.8V and it's best if | |
1532 | * we match. | |
1533 | * | |
1534 | * This function is expected to be used by a controller's | |
1535 | * start_signal_voltage_switch() function. | |
1536 | */ | |
1537 | int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios) | |
1538 | { | |
1539 | struct device *dev = mmc_dev(mmc); | |
1540 | int ret, volt, min_uV, max_uV; | |
1541 | ||
1542 | /* If no vqmmc supply then we can't change the voltage */ | |
1543 | if (IS_ERR(mmc->supply.vqmmc)) | |
1544 | return -EINVAL; | |
1545 | ||
1546 | switch (ios->signal_voltage) { | |
1547 | case MMC_SIGNAL_VOLTAGE_120: | |
1548 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1549 | 1100000, 1200000, 1300000); | |
1550 | case MMC_SIGNAL_VOLTAGE_180: | |
1551 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1552 | 1700000, 1800000, 1950000); | |
1553 | case MMC_SIGNAL_VOLTAGE_330: | |
1554 | ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV); | |
1555 | if (ret < 0) | |
1556 | return ret; | |
1557 | ||
1558 | dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n", | |
1559 | __func__, volt, max_uV); | |
1560 | ||
1561 | min_uV = max(volt - 300000, 2700000); | |
1562 | max_uV = min(max_uV + 200000, 3600000); | |
1563 | ||
1564 | /* | |
1565 | * Due to a limitation in the current implementation of | |
1566 | * regulator_set_voltage_triplet() which is taking the lowest | |
1567 | * voltage possible if below the target, search for a suitable | |
1568 | * voltage in two steps and try to stay close to vmmc | |
1569 | * with a 0.3V tolerance at first. | |
1570 | */ | |
1571 | if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1572 | min_uV, volt, max_uV)) | |
1573 | return 0; | |
1574 | ||
1575 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1576 | 2700000, volt, 3600000); | |
1577 | default: | |
1578 | return -EINVAL; | |
1579 | } | |
1580 | } | |
1581 | EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); | |
1582 | ||
4d1f52f9 TK |
1583 | #endif /* CONFIG_REGULATOR */ |
1584 | ||
e137788d GL |
1585 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1586 | { | |
1587 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1588 | int ret; |
1589 | ||
4d1f52f9 | 1590 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1591 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1592 | |
4d1f52f9 TK |
1593 | if (IS_ERR(mmc->supply.vmmc)) { |
1594 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1595 | return -EPROBE_DEFER; | |
6e1bbc51 | 1596 | dev_dbg(dev, "No vmmc regulator found\n"); |
4d1f52f9 TK |
1597 | } else { |
1598 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1599 | if (ret > 0) | |
1600 | mmc->ocr_avail = ret; | |
1601 | else | |
1602 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1603 | } | |
e137788d | 1604 | |
4d1f52f9 TK |
1605 | if (IS_ERR(mmc->supply.vqmmc)) { |
1606 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1607 | return -EPROBE_DEFER; | |
6e1bbc51 | 1608 | dev_dbg(dev, "No vqmmc regulator found\n"); |
4d1f52f9 | 1609 | } |
e137788d GL |
1610 | |
1611 | return 0; | |
1612 | } | |
1613 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1614 | ||
1da177e4 LT |
1615 | /* |
1616 | * Mask off any voltages we don't support and select | |
1617 | * the lowest voltage | |
1618 | */ | |
7ea239d9 | 1619 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1620 | { |
1621 | int bit; | |
1622 | ||
726d6f23 UH |
1623 | /* |
1624 | * Sanity check the voltages that the card claims to | |
1625 | * support. | |
1626 | */ | |
1627 | if (ocr & 0x7F) { | |
1628 | dev_warn(mmc_dev(host), | |
1629 | "card claims to support voltages below defined range\n"); | |
1630 | ocr &= ~0x7F; | |
1631 | } | |
1632 | ||
1da177e4 | 1633 | ocr &= host->ocr_avail; |
ce69d37b UH |
1634 | if (!ocr) { |
1635 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1636 | return 0; | |
1637 | } | |
1da177e4 | 1638 | |
ce69d37b UH |
1639 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1640 | bit = ffs(ocr) - 1; | |
63ef731a | 1641 | ocr &= 3 << bit; |
ce69d37b | 1642 | mmc_power_cycle(host, ocr); |
1da177e4 | 1643 | } else { |
ce69d37b UH |
1644 | bit = fls(ocr) - 1; |
1645 | ocr &= 3 << bit; | |
1646 | if (bit != host->ios.vdd) | |
1647 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | return ocr; | |
1651 | } | |
1652 | ||
4e74b6b3 | 1653 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
567c8903 JR |
1654 | { |
1655 | int err = 0; | |
1656 | int old_signal_voltage = host->ios.signal_voltage; | |
1657 | ||
1658 | host->ios.signal_voltage = signal_voltage; | |
9eadcc05 | 1659 | if (host->ops->start_signal_voltage_switch) |
567c8903 | 1660 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
567c8903 JR |
1661 | |
1662 | if (err) | |
1663 | host->ios.signal_voltage = old_signal_voltage; | |
1664 | ||
1665 | return err; | |
1666 | ||
1667 | } | |
1668 | ||
2ed573b6 | 1669 | int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) |
f2119df6 | 1670 | { |
c7836d15 | 1671 | struct mmc_command cmd = {}; |
f2119df6 | 1672 | int err = 0; |
0797e5f1 | 1673 | u32 clock; |
f2119df6 | 1674 | |
0797e5f1 JR |
1675 | /* |
1676 | * If we cannot switch voltages, return failure so the caller | |
1677 | * can continue without UHS mode | |
1678 | */ | |
1679 | if (!host->ops->start_signal_voltage_switch) | |
1680 | return -EPERM; | |
1681 | if (!host->ops->card_busy) | |
6606110d JP |
1682 | pr_warn("%s: cannot verify signal voltage switch\n", |
1683 | mmc_hostname(host)); | |
0797e5f1 JR |
1684 | |
1685 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1686 | cmd.arg = 0; | |
1687 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1688 | ||
1689 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1690 | if (err) | |
9eadcc05 UH |
1691 | return err; |
1692 | ||
1693 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1694 | return -EIO; | |
0797e5f1 | 1695 | |
0797e5f1 JR |
1696 | /* |
1697 | * The card should drive cmd and dat[0:3] low immediately | |
1698 | * after the response of cmd11, but wait 1 ms to be sure | |
1699 | */ | |
1700 | mmc_delay(1); | |
1701 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1702 | err = -EAGAIN; | |
1703 | goto power_cycle; | |
1704 | } | |
1705 | /* | |
1706 | * During a signal voltage level switch, the clock must be gated | |
1707 | * for 5 ms according to the SD spec | |
1708 | */ | |
1709 | clock = host->ios.clock; | |
1710 | host->ios.clock = 0; | |
1711 | mmc_set_ios(host); | |
f2119df6 | 1712 | |
4e74b6b3 | 1713 | if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) { |
0797e5f1 JR |
1714 | /* |
1715 | * Voltages may not have been switched, but we've already | |
1716 | * sent CMD11, so a power cycle is required anyway | |
1717 | */ | |
1718 | err = -EAGAIN; | |
1719 | goto power_cycle; | |
f2119df6 AN |
1720 | } |
1721 | ||
7c5209c3 DA |
1722 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
1723 | mmc_delay(10); | |
0797e5f1 JR |
1724 | host->ios.clock = clock; |
1725 | mmc_set_ios(host); | |
1726 | ||
1727 | /* Wait for at least 1 ms according to spec */ | |
1728 | mmc_delay(1); | |
1729 | ||
1730 | /* | |
1731 | * Failure to switch is indicated by the card holding | |
1732 | * dat[0:3] low | |
1733 | */ | |
1734 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1735 | err = -EAGAIN; | |
1736 | ||
1737 | power_cycle: | |
1738 | if (err) { | |
1739 | pr_debug("%s: Signal voltage switch failed, " | |
1740 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1741 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1742 | } |
1743 | ||
0797e5f1 | 1744 | return err; |
f2119df6 AN |
1745 | } |
1746 | ||
b57c43ad | 1747 | /* |
7ea239d9 | 1748 | * Select timing parameters for host. |
b57c43ad | 1749 | */ |
7ea239d9 | 1750 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1751 | { |
7ea239d9 PO |
1752 | host->ios.timing = timing; |
1753 | mmc_set_ios(host); | |
b57c43ad PO |
1754 | } |
1755 | ||
d6d50a15 AN |
1756 | /* |
1757 | * Select appropriate driver type for host. | |
1758 | */ | |
1759 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1760 | { | |
1761 | host->ios.drv_type = drv_type; | |
1762 | mmc_set_ios(host); | |
1763 | } | |
1764 | ||
e23350b3 AH |
1765 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1766 | int card_drv_type, int *drv_type) | |
1767 | { | |
1768 | struct mmc_host *host = card->host; | |
1769 | int host_drv_type = SD_DRIVER_TYPE_B; | |
e23350b3 AH |
1770 | |
1771 | *drv_type = 0; | |
1772 | ||
1773 | if (!host->ops->select_drive_strength) | |
1774 | return 0; | |
1775 | ||
1776 | /* Use SD definition of driver strength for hosts */ | |
1777 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1778 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1779 | ||
1780 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1781 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1782 | ||
1783 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1784 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1785 | ||
1786 | /* | |
1787 | * The drive strength that the hardware can support | |
1788 | * depends on the board design. Pass the appropriate | |
1789 | * information and let the hardware specific code | |
1790 | * return what is possible given the options | |
1791 | */ | |
9eadcc05 UH |
1792 | return host->ops->select_drive_strength(card, max_dtr, |
1793 | host_drv_type, | |
1794 | card_drv_type, | |
1795 | drv_type); | |
e23350b3 AH |
1796 | } |
1797 | ||
1da177e4 | 1798 | /* |
45f8245b RK |
1799 | * Apply power to the MMC stack. This is a two-stage process. |
1800 | * First, we enable power to the card without the clock running. | |
1801 | * We then wait a bit for the power to stabilise. Finally, | |
1802 | * enable the bus drivers and clock to the card. | |
1803 | * | |
1804 | * We must _NOT_ enable the clock prior to power stablising. | |
1805 | * | |
1806 | * If a host does all the power sequencing itself, ignore the | |
1807 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1808 | */ |
4a065193 | 1809 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1810 | { |
fa550189 UH |
1811 | if (host->ios.power_mode == MMC_POWER_ON) |
1812 | return; | |
1813 | ||
3aa8793f UH |
1814 | mmc_pwrseq_pre_power_on(host); |
1815 | ||
4a065193 | 1816 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1817 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1818 | /* Set initial state and call mmc_set_ios */ |
1819 | mmc_set_initial_state(host); | |
1da177e4 | 1820 | |
ceae98f2 | 1821 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
4e74b6b3 | 1822 | if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) |
ceae98f2 | 1823 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); |
4e74b6b3 | 1824 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) |
ceae98f2 | 1825 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); |
4e74b6b3 | 1826 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) |
ceae98f2 | 1827 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); |
108ecc4c | 1828 | |
f9996aee PO |
1829 | /* |
1830 | * This delay should be sufficient to allow the power supply | |
1831 | * to reach the minimum voltage. | |
1832 | */ | |
79bccc5a | 1833 | mmc_delay(10); |
1da177e4 | 1834 | |
4febb7e2 UH |
1835 | mmc_pwrseq_post_power_on(host); |
1836 | ||
88ae8b86 | 1837 | host->ios.clock = host->f_init; |
8dfd0374 | 1838 | |
1da177e4 | 1839 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1840 | mmc_set_ios(host); |
1da177e4 | 1841 | |
f9996aee PO |
1842 | /* |
1843 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1844 | * time required to reach a stable voltage. | |
1845 | */ | |
79bccc5a | 1846 | mmc_delay(10); |
1da177e4 LT |
1847 | } |
1848 | ||
7f7e4129 | 1849 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1850 | { |
fa550189 UH |
1851 | if (host->ios.power_mode == MMC_POWER_OFF) |
1852 | return; | |
1853 | ||
3aa8793f UH |
1854 | mmc_pwrseq_power_off(host); |
1855 | ||
1da177e4 LT |
1856 | host->ios.clock = 0; |
1857 | host->ios.vdd = 0; | |
b33d46c3 | 1858 | |
1da177e4 | 1859 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1860 | /* Set initial state and call mmc_set_ios */ |
1861 | mmc_set_initial_state(host); | |
778e277c | 1862 | |
041beb1d DD |
1863 | /* |
1864 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1865 | * XO-1.5, require a short delay after poweroff before the card | |
1866 | * can be successfully turned on again. | |
1867 | */ | |
1868 | mmc_delay(1); | |
1da177e4 LT |
1869 | } |
1870 | ||
4a065193 | 1871 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1872 | { |
1873 | mmc_power_off(host); | |
1874 | /* Wait at least 1 ms according to SD spec */ | |
1875 | mmc_delay(1); | |
4a065193 | 1876 | mmc_power_up(host, ocr); |
276e090f JR |
1877 | } |
1878 | ||
39361851 AB |
1879 | /* |
1880 | * Cleanup when the last reference to the bus operator is dropped. | |
1881 | */ | |
261172fd | 1882 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 | 1883 | { |
6ff897ff | 1884 | WARN_ON(!host->bus_dead); |
39361851 AB |
1885 | |
1886 | host->bus_ops = NULL; | |
1887 | } | |
1888 | ||
1889 | /* | |
1890 | * Increase reference count of bus operator | |
1891 | */ | |
1892 | static inline void mmc_bus_get(struct mmc_host *host) | |
1893 | { | |
1894 | unsigned long flags; | |
1895 | ||
1896 | spin_lock_irqsave(&host->lock, flags); | |
1897 | host->bus_refs++; | |
1898 | spin_unlock_irqrestore(&host->lock, flags); | |
1899 | } | |
1900 | ||
1901 | /* | |
1902 | * Decrease reference count of bus operator and free it if | |
1903 | * it is the last reference. | |
1904 | */ | |
1905 | static inline void mmc_bus_put(struct mmc_host *host) | |
1906 | { | |
1907 | unsigned long flags; | |
1908 | ||
1909 | spin_lock_irqsave(&host->lock, flags); | |
1910 | host->bus_refs--; | |
1911 | if ((host->bus_refs == 0) && host->bus_ops) | |
1912 | __mmc_release_bus(host); | |
1913 | spin_unlock_irqrestore(&host->lock, flags); | |
1914 | } | |
1915 | ||
1da177e4 | 1916 | /* |
7ea239d9 PO |
1917 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1918 | * host at any given time. | |
1da177e4 | 1919 | */ |
7ea239d9 | 1920 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1921 | { |
7ea239d9 | 1922 | unsigned long flags; |
e45a1bd2 | 1923 | |
d84075c8 | 1924 | WARN_ON(!host->claimed); |
bce40a36 | 1925 | |
7ea239d9 | 1926 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1927 | |
6ff897ff SL |
1928 | WARN_ON(host->bus_ops); |
1929 | WARN_ON(host->bus_refs); | |
b57c43ad | 1930 | |
7ea239d9 PO |
1931 | host->bus_ops = ops; |
1932 | host->bus_refs = 1; | |
1933 | host->bus_dead = 0; | |
b57c43ad | 1934 | |
7ea239d9 | 1935 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1936 | } |
1937 | ||
7ea239d9 | 1938 | /* |
7f7e4129 | 1939 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1940 | */ |
1941 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1942 | { |
7ea239d9 | 1943 | unsigned long flags; |
7ccd266e | 1944 | |
d84075c8 PO |
1945 | WARN_ON(!host->claimed); |
1946 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1947 | |
7ea239d9 | 1948 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1949 | |
7ea239d9 | 1950 | host->bus_dead = 1; |
7ccd266e | 1951 | |
7ea239d9 | 1952 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1953 | |
7ea239d9 | 1954 | mmc_bus_put(host); |
1da177e4 LT |
1955 | } |
1956 | ||
bbd43682 UH |
1957 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1958 | bool cd_irq) | |
1959 | { | |
1960 | #ifdef CONFIG_MMC_DEBUG | |
1961 | unsigned long flags; | |
1962 | spin_lock_irqsave(&host->lock, flags); | |
1963 | WARN_ON(host->removed); | |
1964 | spin_unlock_irqrestore(&host->lock, flags); | |
1965 | #endif | |
1966 | ||
1967 | /* | |
1968 | * If the device is configured as wakeup, we prevent a new sleep for | |
1969 | * 5 s to give provision for user space to consume the event. | |
1970 | */ | |
1971 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1972 | device_can_wakeup(mmc_dev(host))) | |
1973 | pm_wakeup_event(mmc_dev(host), 5000); | |
1974 | ||
1975 | host->detect_change = 1; | |
1976 | mmc_schedule_delayed_work(&host->detect, delay); | |
1977 | } | |
1978 | ||
1da177e4 LT |
1979 | /** |
1980 | * mmc_detect_change - process change of state on a MMC socket | |
1981 | * @host: host which changed state. | |
8dc00335 | 1982 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1983 | * |
67a61c48 PO |
1984 | * MMC drivers should call this when they detect a card has been |
1985 | * inserted or removed. The MMC layer will confirm that any | |
1986 | * present card is still functional, and initialize any newly | |
1987 | * inserted. | |
1da177e4 | 1988 | */ |
8dc00335 | 1989 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1990 | { |
bbd43682 | 1991 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1992 | } |
1da177e4 LT |
1993 | EXPORT_SYMBOL(mmc_detect_change); |
1994 | ||
dfe86cba AH |
1995 | void mmc_init_erase(struct mmc_card *card) |
1996 | { | |
1997 | unsigned int sz; | |
1998 | ||
1999 | if (is_power_of_2(card->erase_size)) | |
2000 | card->erase_shift = ffs(card->erase_size) - 1; | |
2001 | else | |
2002 | card->erase_shift = 0; | |
2003 | ||
2004 | /* | |
2005 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
2006 | * card. That is not desirable because it can take a long time | |
2007 | * (minutes) potentially delaying more important I/O, and also the | |
2008 | * timeout calculations become increasingly hugely over-estimated. | |
2009 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
2010 | * to that size and alignment. | |
2011 | * | |
2012 | * For SD cards that define Allocation Unit size, limit erases to one | |
c6d8fd61 GG |
2013 | * Allocation Unit at a time. |
2014 | * For MMC, have a stab at ai good value and for modern cards it will | |
2015 | * end up being 4MiB. Note that if the value is too small, it can end | |
2016 | * up taking longer to erase. Also note, erase_size is already set to | |
2017 | * High Capacity Erase Size if available when this function is called. | |
dfe86cba AH |
2018 | */ |
2019 | if (mmc_card_sd(card) && card->ssr.au) { | |
2020 | card->pref_erase = card->ssr.au; | |
2021 | card->erase_shift = ffs(card->ssr.au) - 1; | |
cc8aa7de | 2022 | } else if (card->erase_size) { |
dfe86cba AH |
2023 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
2024 | if (sz < 128) | |
2025 | card->pref_erase = 512 * 1024 / 512; | |
2026 | else if (sz < 512) | |
2027 | card->pref_erase = 1024 * 1024 / 512; | |
2028 | else if (sz < 1024) | |
2029 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
2030 | else | |
2031 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
2032 | if (card->pref_erase < card->erase_size) | |
2033 | card->pref_erase = card->erase_size; | |
2034 | else { | |
2035 | sz = card->pref_erase % card->erase_size; | |
2036 | if (sz) | |
2037 | card->pref_erase += card->erase_size - sz; | |
2038 | } | |
cc8aa7de CD |
2039 | } else |
2040 | card->pref_erase = 0; | |
dfe86cba AH |
2041 | } |
2042 | ||
eaa02f75 AW |
2043 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
2044 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
2045 | { |
2046 | unsigned int erase_timeout; | |
2047 | ||
7194efb8 AH |
2048 | if (arg == MMC_DISCARD_ARG || |
2049 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
2050 | erase_timeout = card->ext_csd.trim_timeout; | |
2051 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
2052 | /* High Capacity Erase Group Size uses HC timeouts */ |
2053 | if (arg == MMC_TRIM_ARG) | |
2054 | erase_timeout = card->ext_csd.trim_timeout; | |
2055 | else | |
2056 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
2057 | } else { | |
2058 | /* CSD Erase Group Size uses write timeout */ | |
2059 | unsigned int mult = (10 << card->csd.r2w_factor); | |
2060 | unsigned int timeout_clks = card->csd.tacc_clks * mult; | |
2061 | unsigned int timeout_us; | |
2062 | ||
2063 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ | |
2064 | if (card->csd.tacc_ns < 1000000) | |
2065 | timeout_us = (card->csd.tacc_ns * mult) / 1000; | |
2066 | else | |
2067 | timeout_us = (card->csd.tacc_ns / 1000) * mult; | |
2068 | ||
2069 | /* | |
2070 | * ios.clock is only a target. The real clock rate might be | |
2071 | * less but not that much less, so fudge it by multiplying by 2. | |
2072 | */ | |
2073 | timeout_clks <<= 1; | |
2074 | timeout_us += (timeout_clks * 1000) / | |
9eadcc05 | 2075 | (card->host->ios.clock / 1000); |
dfe86cba AH |
2076 | |
2077 | erase_timeout = timeout_us / 1000; | |
2078 | ||
2079 | /* | |
2080 | * Theoretically, the calculation could underflow so round up | |
2081 | * to 1ms in that case. | |
2082 | */ | |
2083 | if (!erase_timeout) | |
2084 | erase_timeout = 1; | |
2085 | } | |
2086 | ||
2087 | /* Multiplier for secure operations */ | |
2088 | if (arg & MMC_SECURE_ARGS) { | |
2089 | if (arg == MMC_SECURE_ERASE_ARG) | |
2090 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
2091 | else | |
2092 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
2093 | } | |
2094 | ||
2095 | erase_timeout *= qty; | |
2096 | ||
2097 | /* | |
2098 | * Ensure at least a 1 second timeout for SPI as per | |
2099 | * 'mmc_set_data_timeout()' | |
2100 | */ | |
2101 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
2102 | erase_timeout = 1000; | |
2103 | ||
eaa02f75 | 2104 | return erase_timeout; |
dfe86cba AH |
2105 | } |
2106 | ||
eaa02f75 AW |
2107 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
2108 | unsigned int arg, | |
2109 | unsigned int qty) | |
dfe86cba | 2110 | { |
eaa02f75 AW |
2111 | unsigned int erase_timeout; |
2112 | ||
dfe86cba AH |
2113 | if (card->ssr.erase_timeout) { |
2114 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
2115 | erase_timeout = card->ssr.erase_timeout * qty + |
2116 | card->ssr.erase_offset; | |
dfe86cba AH |
2117 | } else { |
2118 | /* | |
2119 | * Erase timeout not specified in SD Status Register (SSR) so | |
2120 | * use 250ms per write block. | |
2121 | */ | |
eaa02f75 | 2122 | erase_timeout = 250 * qty; |
dfe86cba AH |
2123 | } |
2124 | ||
2125 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
2126 | if (erase_timeout < 1000) |
2127 | erase_timeout = 1000; | |
2128 | ||
2129 | return erase_timeout; | |
dfe86cba AH |
2130 | } |
2131 | ||
eaa02f75 AW |
2132 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
2133 | unsigned int arg, | |
2134 | unsigned int qty) | |
dfe86cba AH |
2135 | { |
2136 | if (mmc_card_sd(card)) | |
eaa02f75 | 2137 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 2138 | else |
eaa02f75 | 2139 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2140 | } |
2141 | ||
2142 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
2143 | unsigned int to, unsigned int arg) | |
2144 | { | |
c7836d15 | 2145 | struct mmc_command cmd = {}; |
bb4eecf2 BW |
2146 | unsigned int qty = 0, busy_timeout = 0; |
2147 | bool use_r1b_resp = false; | |
8fee476b | 2148 | unsigned long timeout; |
dfe86cba AH |
2149 | int err; |
2150 | ||
8f11d106 AH |
2151 | mmc_retune_hold(card->host); |
2152 | ||
dfe86cba AH |
2153 | /* |
2154 | * qty is used to calculate the erase timeout which depends on how many | |
2155 | * erase groups (or allocation units in SD terminology) are affected. | |
2156 | * We count erasing part of an erase group as one erase group. | |
2157 | * For SD, the allocation units are always a power of 2. For MMC, the | |
2158 | * erase group size is almost certainly also power of 2, but it does not | |
2159 | * seem to insist on that in the JEDEC standard, so we fall back to | |
2160 | * division in that case. SD may not specify an allocation unit size, | |
2161 | * in which case the timeout is based on the number of write blocks. | |
2162 | * | |
2163 | * Note that the timeout for secure trim 2 will only be correct if the | |
2164 | * number of erase groups specified is the same as the total of all | |
2165 | * preceding secure trim 1 commands. Since the power may have been | |
2166 | * lost since the secure trim 1 commands occurred, it is generally | |
2167 | * impossible to calculate the secure trim 2 timeout correctly. | |
2168 | */ | |
2169 | if (card->erase_shift) | |
2170 | qty += ((to >> card->erase_shift) - | |
2171 | (from >> card->erase_shift)) + 1; | |
2172 | else if (mmc_card_sd(card)) | |
2173 | qty += to - from + 1; | |
2174 | else | |
2175 | qty += ((to / card->erase_size) - | |
2176 | (from / card->erase_size)) + 1; | |
2177 | ||
2178 | if (!mmc_card_blockaddr(card)) { | |
2179 | from <<= 9; | |
2180 | to <<= 9; | |
2181 | } | |
2182 | ||
dfe86cba AH |
2183 | if (mmc_card_sd(card)) |
2184 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
2185 | else | |
2186 | cmd.opcode = MMC_ERASE_GROUP_START; | |
2187 | cmd.arg = from; | |
2188 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2189 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2190 | if (err) { | |
a3c76eb9 | 2191 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 2192 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 2193 | err = -EIO; |
dfe86cba AH |
2194 | goto out; |
2195 | } | |
2196 | ||
2197 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2198 | if (mmc_card_sd(card)) | |
2199 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
2200 | else | |
2201 | cmd.opcode = MMC_ERASE_GROUP_END; | |
2202 | cmd.arg = to; | |
2203 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2204 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2205 | if (err) { | |
a3c76eb9 | 2206 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 2207 | err, cmd.resp[0]); |
67716327 | 2208 | err = -EIO; |
dfe86cba AH |
2209 | goto out; |
2210 | } | |
2211 | ||
2212 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2213 | cmd.opcode = MMC_ERASE; | |
2214 | cmd.arg = arg; | |
bb4eecf2 BW |
2215 | busy_timeout = mmc_erase_timeout(card, arg, qty); |
2216 | /* | |
2217 | * If the host controller supports busy signalling and the timeout for | |
2218 | * the erase operation does not exceed the max_busy_timeout, we should | |
2219 | * use R1B response. Or we need to prevent the host from doing hw busy | |
2220 | * detection, which is done by converting to a R1 response instead. | |
2221 | */ | |
2222 | if (card->host->max_busy_timeout && | |
2223 | busy_timeout > card->host->max_busy_timeout) { | |
2224 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2225 | } else { | |
2226 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
2227 | cmd.busy_timeout = busy_timeout; | |
2228 | use_r1b_resp = true; | |
2229 | } | |
2230 | ||
dfe86cba AH |
2231 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
2232 | if (err) { | |
a3c76eb9 | 2233 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
2234 | err, cmd.resp[0]); |
2235 | err = -EIO; | |
2236 | goto out; | |
2237 | } | |
2238 | ||
2239 | if (mmc_host_is_spi(card->host)) | |
2240 | goto out; | |
2241 | ||
bb4eecf2 BW |
2242 | /* |
2243 | * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling | |
2244 | * shall be avoided. | |
2245 | */ | |
2246 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) | |
2247 | goto out; | |
2248 | ||
2249 | timeout = jiffies + msecs_to_jiffies(busy_timeout); | |
dfe86cba AH |
2250 | do { |
2251 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2252 | cmd.opcode = MMC_SEND_STATUS; | |
2253 | cmd.arg = card->rca << 16; | |
2254 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
2255 | /* Do not retry else we can't see errors */ | |
2256 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2257 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 2258 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
2259 | err, cmd.resp[0]); |
2260 | err = -EIO; | |
2261 | goto out; | |
2262 | } | |
8fee476b TR |
2263 | |
2264 | /* Timeout if the device never becomes ready for data and | |
2265 | * never leaves the program state. | |
2266 | */ | |
2267 | if (time_after(jiffies, timeout)) { | |
2268 | pr_err("%s: Card stuck in programming state! %s\n", | |
2269 | mmc_hostname(card->host), __func__); | |
2270 | err = -EIO; | |
2271 | goto out; | |
2272 | } | |
2273 | ||
dfe86cba | 2274 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2275 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba | 2276 | out: |
8f11d106 | 2277 | mmc_retune_release(card->host); |
dfe86cba AH |
2278 | return err; |
2279 | } | |
2280 | ||
71085123 BW |
2281 | static unsigned int mmc_align_erase_size(struct mmc_card *card, |
2282 | unsigned int *from, | |
2283 | unsigned int *to, | |
2284 | unsigned int nr) | |
2285 | { | |
2286 | unsigned int from_new = *from, nr_new = nr, rem; | |
2287 | ||
6c689886 BW |
2288 | /* |
2289 | * When the 'card->erase_size' is power of 2, we can use round_up/down() | |
2290 | * to align the erase size efficiently. | |
2291 | */ | |
2292 | if (is_power_of_2(card->erase_size)) { | |
2293 | unsigned int temp = from_new; | |
2294 | ||
2295 | from_new = round_up(temp, card->erase_size); | |
2296 | rem = from_new - temp; | |
2297 | ||
71085123 BW |
2298 | if (nr_new > rem) |
2299 | nr_new -= rem; | |
2300 | else | |
2301 | return 0; | |
71085123 | 2302 | |
6c689886 BW |
2303 | nr_new = round_down(nr_new, card->erase_size); |
2304 | } else { | |
2305 | rem = from_new % card->erase_size; | |
2306 | if (rem) { | |
2307 | rem = card->erase_size - rem; | |
2308 | from_new += rem; | |
2309 | if (nr_new > rem) | |
2310 | nr_new -= rem; | |
2311 | else | |
2312 | return 0; | |
2313 | } | |
2314 | ||
2315 | rem = nr_new % card->erase_size; | |
2316 | if (rem) | |
2317 | nr_new -= rem; | |
2318 | } | |
71085123 BW |
2319 | |
2320 | if (nr_new == 0) | |
2321 | return 0; | |
2322 | ||
2323 | *to = from_new + nr_new; | |
2324 | *from = from_new; | |
2325 | ||
2326 | return nr_new; | |
2327 | } | |
2328 | ||
dfe86cba AH |
2329 | /** |
2330 | * mmc_erase - erase sectors. | |
2331 | * @card: card to erase | |
2332 | * @from: first sector to erase | |
2333 | * @nr: number of sectors to erase | |
2334 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2335 | * | |
2336 | * Caller must claim host before calling this function. | |
2337 | */ | |
2338 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2339 | unsigned int arg) | |
2340 | { | |
2341 | unsigned int rem, to = from + nr; | |
642c28ab | 2342 | int err; |
dfe86cba AH |
2343 | |
2344 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2345 | !(card->csd.cmdclass & CCC_ERASE)) | |
2346 | return -EOPNOTSUPP; | |
2347 | ||
2348 | if (!card->erase_size) | |
2349 | return -EOPNOTSUPP; | |
2350 | ||
2351 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2352 | return -EOPNOTSUPP; | |
2353 | ||
2354 | if ((arg & MMC_SECURE_ARGS) && | |
2355 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2356 | return -EOPNOTSUPP; | |
2357 | ||
2358 | if ((arg & MMC_TRIM_ARGS) && | |
2359 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2360 | return -EOPNOTSUPP; | |
2361 | ||
2362 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2363 | if (from % card->erase_size || nr % card->erase_size) | |
2364 | return -EINVAL; | |
2365 | } | |
2366 | ||
71085123 BW |
2367 | if (arg == MMC_ERASE_ARG) |
2368 | nr = mmc_align_erase_size(card, &from, &to, nr); | |
dfe86cba AH |
2369 | |
2370 | if (nr == 0) | |
2371 | return 0; | |
2372 | ||
dfe86cba AH |
2373 | if (to <= from) |
2374 | return -EINVAL; | |
2375 | ||
2376 | /* 'from' and 'to' are inclusive */ | |
2377 | to -= 1; | |
2378 | ||
642c28ab DJ |
2379 | /* |
2380 | * Special case where only one erase-group fits in the timeout budget: | |
2381 | * If the region crosses an erase-group boundary on this particular | |
2382 | * case, we will be trimming more than one erase-group which, does not | |
2383 | * fit in the timeout budget of the controller, so we need to split it | |
2384 | * and call mmc_do_erase() twice if necessary. This special case is | |
2385 | * identified by the card->eg_boundary flag. | |
2386 | */ | |
22d7e85f RG |
2387 | rem = card->erase_size - (from % card->erase_size); |
2388 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
2389 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
2390 | from += rem; | |
2391 | if ((err) || (to <= from)) | |
2392 | return err; | |
2393 | } | |
2394 | ||
dfe86cba AH |
2395 | return mmc_do_erase(card, from, to, arg); |
2396 | } | |
2397 | EXPORT_SYMBOL(mmc_erase); | |
2398 | ||
2399 | int mmc_can_erase(struct mmc_card *card) | |
2400 | { | |
2401 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2402 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2403 | return 1; | |
2404 | return 0; | |
2405 | } | |
2406 | EXPORT_SYMBOL(mmc_can_erase); | |
2407 | ||
2408 | int mmc_can_trim(struct mmc_card *card) | |
2409 | { | |
b5b4ff0a SL |
2410 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
2411 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
2412 | return 1; |
2413 | return 0; | |
2414 | } | |
2415 | EXPORT_SYMBOL(mmc_can_trim); | |
2416 | ||
b3bf9153 KP |
2417 | int mmc_can_discard(struct mmc_card *card) |
2418 | { | |
2419 | /* | |
2420 | * As there's no way to detect the discard support bit at v4.5 | |
2421 | * use the s/w feature support filed. | |
2422 | */ | |
2423 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2424 | return 1; | |
2425 | return 0; | |
2426 | } | |
2427 | EXPORT_SYMBOL(mmc_can_discard); | |
2428 | ||
d9ddd629 KP |
2429 | int mmc_can_sanitize(struct mmc_card *card) |
2430 | { | |
28302812 AH |
2431 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2432 | return 0; | |
d9ddd629 KP |
2433 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2434 | return 1; | |
2435 | return 0; | |
2436 | } | |
2437 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2438 | ||
dfe86cba AH |
2439 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2440 | { | |
5204d00f LC |
2441 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2442 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2443 | return 1; |
2444 | return 0; | |
2445 | } | |
2446 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2447 | ||
2448 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2449 | unsigned int nr) | |
2450 | { | |
2451 | if (!card->erase_size) | |
2452 | return 0; | |
2453 | if (from % card->erase_size || nr % card->erase_size) | |
2454 | return 0; | |
2455 | return 1; | |
2456 | } | |
2457 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2458 | |
e056a1b5 AH |
2459 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2460 | unsigned int arg) | |
2461 | { | |
2462 | struct mmc_host *host = card->host; | |
bb4eecf2 | 2463 | unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; |
e056a1b5 | 2464 | unsigned int last_timeout = 0; |
12182aff UH |
2465 | unsigned int max_busy_timeout = host->max_busy_timeout ? |
2466 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; | |
e056a1b5 | 2467 | |
bb4eecf2 | 2468 | if (card->erase_shift) { |
e056a1b5 | 2469 | max_qty = UINT_MAX >> card->erase_shift; |
bb4eecf2 BW |
2470 | min_qty = card->pref_erase >> card->erase_shift; |
2471 | } else if (mmc_card_sd(card)) { | |
e056a1b5 | 2472 | max_qty = UINT_MAX; |
bb4eecf2 BW |
2473 | min_qty = card->pref_erase; |
2474 | } else { | |
e056a1b5 | 2475 | max_qty = UINT_MAX / card->erase_size; |
bb4eecf2 BW |
2476 | min_qty = card->pref_erase / card->erase_size; |
2477 | } | |
e056a1b5 | 2478 | |
bb4eecf2 BW |
2479 | /* |
2480 | * We should not only use 'host->max_busy_timeout' as the limitation | |
2481 | * when deciding the max discard sectors. We should set a balance value | |
2482 | * to improve the erase speed, and it can not get too long timeout at | |
2483 | * the same time. | |
2484 | * | |
2485 | * Here we set 'card->pref_erase' as the minimal discard sectors no | |
2486 | * matter what size of 'host->max_busy_timeout', but if the | |
2487 | * 'host->max_busy_timeout' is large enough for more discard sectors, | |
2488 | * then we can continue to increase the max discard sectors until we | |
12182aff UH |
2489 | * get a balance value. In cases when the 'host->max_busy_timeout' |
2490 | * isn't specified, use the default max erase timeout. | |
bb4eecf2 | 2491 | */ |
e056a1b5 AH |
2492 | do { |
2493 | y = 0; | |
2494 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2495 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
bb4eecf2 | 2496 | |
12182aff | 2497 | if (qty + x > min_qty && timeout > max_busy_timeout) |
e056a1b5 | 2498 | break; |
bb4eecf2 | 2499 | |
e056a1b5 AH |
2500 | if (timeout < last_timeout) |
2501 | break; | |
2502 | last_timeout = timeout; | |
2503 | y = x; | |
2504 | } | |
2505 | qty += y; | |
2506 | } while (y); | |
2507 | ||
2508 | if (!qty) | |
2509 | return 0; | |
2510 | ||
642c28ab DJ |
2511 | /* |
2512 | * When specifying a sector range to trim, chances are we might cross | |
2513 | * an erase-group boundary even if the amount of sectors is less than | |
2514 | * one erase-group. | |
2515 | * If we can only fit one erase-group in the controller timeout budget, | |
2516 | * we have to care that erase-group boundaries are not crossed by a | |
2517 | * single trim operation. We flag that special case with "eg_boundary". | |
2518 | * In all other cases we can just decrement qty and pretend that we | |
2519 | * always touch (qty + 1) erase-groups as a simple optimization. | |
2520 | */ | |
e056a1b5 | 2521 | if (qty == 1) |
642c28ab DJ |
2522 | card->eg_boundary = 1; |
2523 | else | |
2524 | qty--; | |
e056a1b5 AH |
2525 | |
2526 | /* Convert qty to sectors */ | |
2527 | if (card->erase_shift) | |
642c28ab | 2528 | max_discard = qty << card->erase_shift; |
e056a1b5 | 2529 | else if (mmc_card_sd(card)) |
642c28ab | 2530 | max_discard = qty + 1; |
e056a1b5 | 2531 | else |
642c28ab | 2532 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
2533 | |
2534 | return max_discard; | |
2535 | } | |
2536 | ||
2537 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2538 | { | |
2539 | struct mmc_host *host = card->host; | |
2540 | unsigned int max_discard, max_trim; | |
2541 | ||
e056a1b5 AH |
2542 | /* |
2543 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2544 | * frequence which can change. In that case, the best choice is | |
2545 | * just the preferred erase size. | |
2546 | */ | |
2547 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2548 | return card->pref_erase; | |
2549 | ||
2550 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2551 | if (mmc_can_trim(card)) { | |
2552 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2553 | if (max_trim < max_discard) | |
2554 | max_discard = max_trim; | |
2555 | } else if (max_discard < card->erase_size) { | |
2556 | max_discard = 0; | |
2557 | } | |
2558 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
12182aff UH |
2559 | mmc_hostname(host), max_discard, host->max_busy_timeout ? |
2560 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); | |
e056a1b5 AH |
2561 | return max_discard; |
2562 | } | |
2563 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2564 | ||
0f8d8ea6 AH |
2565 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2566 | { | |
c7836d15 | 2567 | struct mmc_command cmd = {}; |
0f8d8ea6 | 2568 | |
1712c937 ZX |
2569 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || |
2570 | mmc_card_hs400(card) || mmc_card_hs400es(card)) | |
0f8d8ea6 AH |
2571 | return 0; |
2572 | ||
0f8d8ea6 AH |
2573 | cmd.opcode = MMC_SET_BLOCKLEN; |
2574 | cmd.arg = blocklen; | |
2575 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2576 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2577 | } | |
2578 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2579 | ||
67c79db8 LP |
2580 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2581 | bool is_rel_write) | |
2582 | { | |
c7836d15 | 2583 | struct mmc_command cmd = {}; |
67c79db8 LP |
2584 | |
2585 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2586 | cmd.arg = blockcount & 0x0000FFFF; | |
2587 | if (is_rel_write) | |
2588 | cmd.arg |= 1 << 31; | |
2589 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2590 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2591 | } | |
2592 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2593 | ||
b2499518 AH |
2594 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2595 | { | |
2596 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) | |
2597 | return; | |
b2499518 | 2598 | host->ops->hw_reset(host); |
b2499518 AH |
2599 | } |
2600 | ||
83533ab2 | 2601 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2602 | { |
f855a371 | 2603 | int ret; |
b2499518 | 2604 | |
f855a371 | 2605 | if (!host->card) |
b2499518 AH |
2606 | return -EINVAL; |
2607 | ||
f855a371 JR |
2608 | mmc_bus_get(host); |
2609 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { | |
2610 | mmc_bus_put(host); | |
b2499518 | 2611 | return -EOPNOTSUPP; |
b2499518 AH |
2612 | } |
2613 | ||
f855a371 JR |
2614 | ret = host->bus_ops->reset(host); |
2615 | mmc_bus_put(host); | |
b2499518 | 2616 | |
4e6c7178 GG |
2617 | if (ret) |
2618 | pr_warn("%s: tried to reset card, got error %d\n", | |
2619 | mmc_hostname(host), ret); | |
b2499518 | 2620 | |
f855a371 | 2621 | return ret; |
b2499518 | 2622 | } |
b2499518 AH |
2623 | EXPORT_SYMBOL(mmc_hw_reset); |
2624 | ||
807e8e40 AR |
2625 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2626 | { | |
2627 | host->f_init = freq; | |
2628 | ||
2629 | #ifdef CONFIG_MMC_DEBUG | |
2630 | pr_info("%s: %s: trying to init card at %u Hz\n", | |
2631 | mmc_hostname(host), __func__, host->f_init); | |
2632 | #endif | |
4a065193 | 2633 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2634 | |
b2499518 AH |
2635 | /* |
2636 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2637 | * do a hardware reset if possible. | |
2638 | */ | |
2639 | mmc_hw_reset_for_init(host); | |
2640 | ||
2f94e55a PR |
2641 | /* |
2642 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2643 | * if the card is being re-initialized, just send it. CMD52 | |
2644 | * should be ignored by SD/eMMC cards. | |
100a606d | 2645 | * Skip it if we already know that we do not support SDIO commands |
2f94e55a | 2646 | */ |
100a606d CC |
2647 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2648 | sdio_reset(host); | |
2649 | ||
807e8e40 AR |
2650 | mmc_go_idle(host); |
2651 | ||
1b8d79c5 UH |
2652 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2653 | mmc_send_if_cond(host, host->ocr_avail); | |
807e8e40 AR |
2654 | |
2655 | /* Order's important: probe SDIO, then SD, then MMC */ | |
100a606d CC |
2656 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2657 | if (!mmc_attach_sdio(host)) | |
2658 | return 0; | |
2659 | ||
1b8d79c5 UH |
2660 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2661 | if (!mmc_attach_sd(host)) | |
2662 | return 0; | |
2663 | ||
a0c3b68c SL |
2664 | if (!(host->caps2 & MMC_CAP2_NO_MMC)) |
2665 | if (!mmc_attach_mmc(host)) | |
2666 | return 0; | |
807e8e40 AR |
2667 | |
2668 | mmc_power_off(host); | |
2669 | return -EIO; | |
2670 | } | |
2671 | ||
d3049504 AH |
2672 | int _mmc_detect_card_removed(struct mmc_host *host) |
2673 | { | |
2674 | int ret; | |
2675 | ||
d3049504 AH |
2676 | if (!host->card || mmc_card_removed(host->card)) |
2677 | return 1; | |
2678 | ||
2679 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2680 | |
2681 | /* | |
2682 | * Card detect status and alive check may be out of sync if card is | |
2683 | * removed slowly, when card detect switch changes while card/slot | |
2684 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2685 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2686 | * detect work 200ms later for this case. | |
2687 | */ | |
2688 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2689 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2690 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2691 | } | |
2692 | ||
d3049504 AH |
2693 | if (ret) { |
2694 | mmc_card_set_removed(host->card); | |
2695 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2696 | } | |
2697 | ||
2698 | return ret; | |
2699 | } | |
2700 | ||
2701 | int mmc_detect_card_removed(struct mmc_host *host) | |
2702 | { | |
2703 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2704 | int ret; |
d3049504 AH |
2705 | |
2706 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2707 | |
2708 | if (!card) | |
2709 | return 1; | |
2710 | ||
6067bafe | 2711 | if (!mmc_card_is_removable(host)) |
1ff2575b UH |
2712 | return 0; |
2713 | ||
f0cc9cf9 | 2714 | ret = mmc_card_removed(card); |
d3049504 AH |
2715 | /* |
2716 | * The card will be considered unchanged unless we have been asked to | |
2717 | * detect a change or host requires polling to provide card detection. | |
2718 | */ | |
b6891679 | 2719 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2720 | return ret; |
d3049504 AH |
2721 | |
2722 | host->detect_change = 0; | |
f0cc9cf9 UH |
2723 | if (!ret) { |
2724 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2725 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2726 | /* |
2727 | * Schedule a detect work as soon as possible to let a | |
2728 | * rescan handle the card removal. | |
2729 | */ | |
2730 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2731 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2732 | } |
2733 | } | |
d3049504 | 2734 | |
f0cc9cf9 | 2735 | return ret; |
d3049504 AH |
2736 | } |
2737 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2738 | ||
b93931a6 | 2739 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2740 | { |
c4028958 DH |
2741 | struct mmc_host *host = |
2742 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2743 | int i; |
4c2ef25f | 2744 | |
807e8e40 | 2745 | if (host->rescan_disable) |
4c2ef25f | 2746 | return; |
1da177e4 | 2747 | |
3339d1e3 | 2748 | /* If there is a non-removable card registered, only scan once */ |
6067bafe | 2749 | if (!mmc_card_is_removable(host) && host->rescan_entered) |
3339d1e3 JR |
2750 | return; |
2751 | host->rescan_entered = 1; | |
2752 | ||
86236813 | 2753 | if (host->trigger_card_event && host->ops->card_event) { |
d234d212 | 2754 | mmc_claim_host(host); |
86236813 | 2755 | host->ops->card_event(host); |
d234d212 | 2756 | mmc_release_host(host); |
86236813 UH |
2757 | host->trigger_card_event = false; |
2758 | } | |
2759 | ||
7ea239d9 | 2760 | mmc_bus_get(host); |
b855885e | 2761 | |
30201e7f OBC |
2762 | /* |
2763 | * if there is a _removable_ card registered, check whether it is | |
2764 | * still present | |
2765 | */ | |
6067bafe | 2766 | if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host)) |
94d89efb JS |
2767 | host->bus_ops->detect(host); |
2768 | ||
d3049504 AH |
2769 | host->detect_change = 0; |
2770 | ||
c5841798 CB |
2771 | /* |
2772 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2773 | * the card is no longer present. | |
2774 | */ | |
94d89efb | 2775 | mmc_bus_put(host); |
94d89efb JS |
2776 | mmc_bus_get(host); |
2777 | ||
2778 | /* if there still is a card present, stop here */ | |
2779 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2780 | mmc_bus_put(host); |
94d89efb JS |
2781 | goto out; |
2782 | } | |
1da177e4 | 2783 | |
94d89efb JS |
2784 | /* |
2785 | * Only we can add a new handler, so it's safe to | |
2786 | * release the lock here. | |
2787 | */ | |
2788 | mmc_bus_put(host); | |
1da177e4 | 2789 | |
d234d212 | 2790 | mmc_claim_host(host); |
6067bafe | 2791 | if (mmc_card_is_removable(host) && host->ops->get_cd && |
c1b55bfc | 2792 | host->ops->get_cd(host) == 0) { |
fa550189 UH |
2793 | mmc_power_off(host); |
2794 | mmc_release_host(host); | |
94d89efb | 2795 | goto out; |
fa550189 | 2796 | } |
1da177e4 | 2797 | |
88ae8b86 | 2798 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2799 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2800 | break; | |
06b2233a | 2801 | if (freqs[i] <= host->f_min) |
807e8e40 | 2802 | break; |
88ae8b86 | 2803 | } |
807e8e40 AR |
2804 | mmc_release_host(host); |
2805 | ||
2806 | out: | |
28f52482 AV |
2807 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2808 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2809 | } |
2810 | ||
b93931a6 | 2811 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2812 | { |
fa550189 | 2813 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2814 | host->rescan_disable = 0; |
8af465db | 2815 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
8d1ffc8c | 2816 | |
c2c24819 UH |
2817 | if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) { |
2818 | mmc_claim_host(host); | |
4a065193 | 2819 | mmc_power_up(host, host->ocr_avail); |
c2c24819 UH |
2820 | mmc_release_host(host); |
2821 | } | |
8d1ffc8c | 2822 | |
740a221e | 2823 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2824 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2825 | } |
2826 | ||
b93931a6 | 2827 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2828 | { |
3b91e550 | 2829 | #ifdef CONFIG_MMC_DEBUG |
1efd48b3 PO |
2830 | unsigned long flags; |
2831 | spin_lock_irqsave(&host->lock, flags); | |
3b91e550 | 2832 | host->removed = 1; |
1efd48b3 | 2833 | spin_unlock_irqrestore(&host->lock, flags); |
3b91e550 | 2834 | #endif |
740a221e AH |
2835 | if (host->slot.cd_irq >= 0) |
2836 | disable_irq(host->slot.cd_irq); | |
3b91e550 | 2837 | |
d9adcc12 | 2838 | host->rescan_disable = 1; |
d9bcbf34 | 2839 | cancel_delayed_work_sync(&host->detect); |
3b91e550 | 2840 | |
da68c4eb NP |
2841 | /* clear pm flags now and let card drivers set them as needed */ |
2842 | host->pm_flags = 0; | |
2843 | ||
7ea239d9 PO |
2844 | mmc_bus_get(host); |
2845 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2846 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2847 | host->bus_ops->remove(host); |
7ea239d9 PO |
2848 | mmc_claim_host(host); |
2849 | mmc_detach_bus(host); | |
7f7e4129 | 2850 | mmc_power_off(host); |
7ea239d9 | 2851 | mmc_release_host(host); |
53509f0f DK |
2852 | mmc_bus_put(host); |
2853 | return; | |
1da177e4 | 2854 | } |
7ea239d9 PO |
2855 | mmc_bus_put(host); |
2856 | ||
8d1ffc8c | 2857 | mmc_claim_host(host); |
1da177e4 | 2858 | mmc_power_off(host); |
8d1ffc8c | 2859 | mmc_release_host(host); |
1da177e4 LT |
2860 | } |
2861 | ||
12ae637f | 2862 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2863 | { |
12ae637f OBC |
2864 | int ret = 0; |
2865 | ||
bb9cab94 DD |
2866 | #ifdef CONFIG_MMC_DEBUG |
2867 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); | |
2868 | #endif | |
2869 | ||
eae1aeee AH |
2870 | mmc_bus_get(host); |
2871 | ||
5601aaf7 | 2872 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2873 | mmc_bus_put(host); |
12ae637f | 2874 | return -EINVAL; |
eae1aeee AH |
2875 | } |
2876 | ||
2877 | if (host->bus_ops->power_save) | |
12ae637f | 2878 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2879 | |
2880 | mmc_bus_put(host); | |
2881 | ||
2882 | mmc_power_off(host); | |
12ae637f OBC |
2883 | |
2884 | return ret; | |
eae1aeee AH |
2885 | } |
2886 | EXPORT_SYMBOL(mmc_power_save_host); | |
2887 | ||
12ae637f | 2888 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2889 | { |
12ae637f OBC |
2890 | int ret; |
2891 | ||
bb9cab94 DD |
2892 | #ifdef CONFIG_MMC_DEBUG |
2893 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); | |
2894 | #endif | |
2895 | ||
eae1aeee AH |
2896 | mmc_bus_get(host); |
2897 | ||
5601aaf7 | 2898 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2899 | mmc_bus_put(host); |
12ae637f | 2900 | return -EINVAL; |
eae1aeee AH |
2901 | } |
2902 | ||
69041150 | 2903 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2904 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2905 | |
2906 | mmc_bus_put(host); | |
12ae637f OBC |
2907 | |
2908 | return ret; | |
eae1aeee AH |
2909 | } |
2910 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2911 | ||
881d1c25 SJ |
2912 | /* |
2913 | * Flush the cache to the non-volatile storage. | |
2914 | */ | |
2915 | int mmc_flush_cache(struct mmc_card *card) | |
2916 | { | |
881d1c25 SJ |
2917 | int err = 0; |
2918 | ||
881d1c25 SJ |
2919 | if (mmc_card_mmc(card) && |
2920 | (card->ext_csd.cache_size > 0) && | |
2921 | (card->ext_csd.cache_ctrl & 1)) { | |
2922 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
2923 | EXT_CSD_FLUSH_CACHE, 1, 0); | |
2924 | if (err) | |
2925 | pr_err("%s: cache flush error %d\n", | |
2926 | mmc_hostname(card->host), err); | |
2927 | } | |
2928 | ||
2929 | return err; | |
2930 | } | |
2931 | EXPORT_SYMBOL(mmc_flush_cache); | |
2932 | ||
8dede18e | 2933 | #ifdef CONFIG_PM_SLEEP |
4c2ef25f ML |
2934 | /* Do the card removal on suspend if card is assumed removeable |
2935 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2936 | to sync the card. | |
2937 | */ | |
8dede18e UH |
2938 | static int mmc_pm_notify(struct notifier_block *notify_block, |
2939 | unsigned long mode, void *unused) | |
4c2ef25f ML |
2940 | { |
2941 | struct mmc_host *host = container_of( | |
2942 | notify_block, struct mmc_host, pm_notify); | |
2943 | unsigned long flags; | |
810caddb | 2944 | int err = 0; |
4c2ef25f ML |
2945 | |
2946 | switch (mode) { | |
2947 | case PM_HIBERNATION_PREPARE: | |
2948 | case PM_SUSPEND_PREPARE: | |
184af16b | 2949 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2950 | spin_lock_irqsave(&host->lock, flags); |
2951 | host->rescan_disable = 1; | |
2952 | spin_unlock_irqrestore(&host->lock, flags); | |
2953 | cancel_delayed_work_sync(&host->detect); | |
2954 | ||
810caddb UH |
2955 | if (!host->bus_ops) |
2956 | break; | |
2957 | ||
2958 | /* Validate prerequisites for suspend */ | |
2959 | if (host->bus_ops->pre_suspend) | |
2960 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2961 | if (!err) |
4c2ef25f ML |
2962 | break; |
2963 | ||
0db13fc2 | 2964 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2965 | host->bus_ops->remove(host); |
0db13fc2 | 2966 | mmc_claim_host(host); |
4c2ef25f | 2967 | mmc_detach_bus(host); |
7f7e4129 | 2968 | mmc_power_off(host); |
4c2ef25f ML |
2969 | mmc_release_host(host); |
2970 | host->pm_flags = 0; | |
2971 | break; | |
2972 | ||
2973 | case PM_POST_SUSPEND: | |
2974 | case PM_POST_HIBERNATION: | |
274476f8 | 2975 | case PM_POST_RESTORE: |
4c2ef25f ML |
2976 | |
2977 | spin_lock_irqsave(&host->lock, flags); | |
2978 | host->rescan_disable = 0; | |
2979 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2980 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2981 | |
2982 | } | |
2983 | ||
2984 | return 0; | |
2985 | } | |
8dede18e UH |
2986 | |
2987 | void mmc_register_pm_notifier(struct mmc_host *host) | |
2988 | { | |
2989 | host->pm_notify.notifier_call = mmc_pm_notify; | |
2990 | register_pm_notifier(&host->pm_notify); | |
2991 | } | |
2992 | ||
2993 | void mmc_unregister_pm_notifier(struct mmc_host *host) | |
2994 | { | |
2995 | unregister_pm_notifier(&host->pm_notify); | |
2996 | } | |
1da177e4 LT |
2997 | #endif |
2998 | ||
2220eedf KD |
2999 | /** |
3000 | * mmc_init_context_info() - init synchronization context | |
3001 | * @host: mmc host | |
3002 | * | |
3003 | * Init struct context_info needed to implement asynchronous | |
3004 | * request mechanism, used by mmc core, host driver and mmc requests | |
3005 | * supplier. | |
3006 | */ | |
3007 | void mmc_init_context_info(struct mmc_host *host) | |
3008 | { | |
2220eedf KD |
3009 | host->context_info.is_new_req = false; |
3010 | host->context_info.is_done_rcv = false; | |
3011 | host->context_info.is_waiting_last_req = false; | |
3012 | init_waitqueue_head(&host->context_info.wait); | |
3013 | } | |
3014 | ||
ffce2e7e PO |
3015 | static int __init mmc_init(void) |
3016 | { | |
3017 | int ret; | |
3018 | ||
ffce2e7e | 3019 | ret = mmc_register_bus(); |
e29a7d73 | 3020 | if (ret) |
520bd7a8 | 3021 | return ret; |
e29a7d73 PO |
3022 | |
3023 | ret = mmc_register_host_class(); | |
3024 | if (ret) | |
3025 | goto unregister_bus; | |
3026 | ||
3027 | ret = sdio_register_bus(); | |
3028 | if (ret) | |
3029 | goto unregister_host_class; | |
3030 | ||
3031 | return 0; | |
3032 | ||
3033 | unregister_host_class: | |
3034 | mmc_unregister_host_class(); | |
3035 | unregister_bus: | |
3036 | mmc_unregister_bus(); | |
ffce2e7e PO |
3037 | return ret; |
3038 | } | |
3039 | ||
3040 | static void __exit mmc_exit(void) | |
3041 | { | |
e29a7d73 | 3042 | sdio_unregister_bus(); |
ffce2e7e PO |
3043 | mmc_unregister_host_class(); |
3044 | mmc_unregister_bus(); | |
ffce2e7e PO |
3045 | } |
3046 | ||
26074962 | 3047 | subsys_initcall(mmc_init); |
ffce2e7e PO |
3048 | module_exit(mmc_exit); |
3049 | ||
1da177e4 | 3050 | MODULE_LICENSE("GPL"); |