Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
aaac1b47 | 3 | * linux/drivers/mmc/core/core.c |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5b4fd9ae | 6 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
ad3868b2 | 7 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
bce40a36 | 8 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
1da177e4 | 9 | */ |
1da177e4 LT |
10 | #include <linux/module.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/pagemap.h> | |
17 | #include <linux/err.h> | |
af8350c7 | 18 | #include <linux/leds.h> |
b57c43ad | 19 | #include <linux/scatterlist.h> |
86e8286a | 20 | #include <linux/log2.h> |
e594573d | 21 | #include <linux/pm_runtime.h> |
bbd43682 | 22 | #include <linux/pm_wakeup.h> |
35eb6db1 | 23 | #include <linux/suspend.h> |
1b676f70 PF |
24 | #include <linux/fault-inject.h> |
25 | #include <linux/random.h> | |
950d56ac | 26 | #include <linux/slab.h> |
6e9e318b | 27 | #include <linux/of.h> |
1da177e4 LT |
28 | |
29 | #include <linux/mmc/card.h> | |
30 | #include <linux/mmc/host.h> | |
da7fbe58 PO |
31 | #include <linux/mmc/mmc.h> |
32 | #include <linux/mmc/sd.h> | |
740a221e | 33 | #include <linux/mmc/slot-gpio.h> |
1da177e4 | 34 | |
7962fc37 BW |
35 | #define CREATE_TRACE_POINTS |
36 | #include <trace/events/mmc.h> | |
37 | ||
aaac1b47 | 38 | #include "core.h" |
4facdde1 | 39 | #include "card.h" |
93f1c150 | 40 | #include "crypto.h" |
ffce2e7e PO |
41 | #include "bus.h" |
42 | #include "host.h" | |
e29a7d73 | 43 | #include "sdio_bus.h" |
3aa8793f | 44 | #include "pwrseq.h" |
da7fbe58 PO |
45 | |
46 | #include "mmc_ops.h" | |
47 | #include "sd_ops.h" | |
5c4e6f13 | 48 | #include "sdio_ops.h" |
1da177e4 | 49 | |
12182aff UH |
50 | /* The max erase timeout, used when host->max_busy_timeout isn't specified */ |
51 | #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ | |
ad9be7ff | 52 | #define SD_DISCARD_TIMEOUT_MS (250) |
12182aff | 53 | |
fa550189 | 54 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 55 | |
af517150 DB |
56 | /* |
57 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
58 | * performance cost, and for other reasons may not always be desired. | |
59 | * So we allow it it to be disabled. | |
60 | */ | |
90ab5ee9 | 61 | bool use_spi_crc = 1; |
af517150 DB |
62 | module_param(use_spi_crc, bool, 0); |
63 | ||
ffce2e7e PO |
64 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
65 | unsigned long delay) | |
66 | { | |
520bd7a8 UH |
67 | /* |
68 | * We use the system_freezable_wq, because of two reasons. | |
69 | * First, it allows several works (not the same work item) to be | |
70 | * executed simultaneously. Second, the queue becomes frozen when | |
71 | * userspace becomes frozen during system PM. | |
72 | */ | |
73 | return queue_delayed_work(system_freezable_wq, work, delay); | |
ffce2e7e PO |
74 | } |
75 | ||
1b676f70 PF |
76 | #ifdef CONFIG_FAIL_MMC_REQUEST |
77 | ||
78 | /* | |
79 | * Internal function. Inject random data errors. | |
80 | * If mmc_data is NULL no errors are injected. | |
81 | */ | |
82 | static void mmc_should_fail_request(struct mmc_host *host, | |
83 | struct mmc_request *mrq) | |
84 | { | |
85 | struct mmc_command *cmd = mrq->cmd; | |
86 | struct mmc_data *data = mrq->data; | |
87 | static const int data_errors[] = { | |
88 | -ETIMEDOUT, | |
89 | -EILSEQ, | |
90 | -EIO, | |
91 | }; | |
92 | ||
93 | if (!data) | |
94 | return; | |
95 | ||
e5723f95 | 96 | if ((cmd && cmd->error) || data->error || |
1b676f70 PF |
97 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) |
98 | return; | |
99 | ||
2e744fcb AM |
100 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
101 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
102 | } |
103 | ||
104 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
105 | ||
106 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
107 | struct mmc_request *mrq) | |
108 | { | |
109 | } | |
110 | ||
111 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
112 | ||
5163af5a AH |
113 | static inline void mmc_complete_cmd(struct mmc_request *mrq) |
114 | { | |
115 | if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) | |
116 | complete_all(&mrq->cmd_completion); | |
117 | } | |
118 | ||
119 | void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) | |
120 | { | |
121 | if (!mrq->cap_cmd_during_tfr) | |
122 | return; | |
123 | ||
124 | mmc_complete_cmd(mrq); | |
125 | ||
126 | pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", | |
127 | mmc_hostname(host), mrq->cmd->opcode); | |
128 | } | |
129 | EXPORT_SYMBOL(mmc_command_done); | |
130 | ||
1da177e4 | 131 | /** |
fe10c6ab RK |
132 | * mmc_request_done - finish processing an MMC request |
133 | * @host: MMC host which completed request | |
134 | * @mrq: MMC request which request | |
1da177e4 LT |
135 | * |
136 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 137 | * their processing of a request. |
1da177e4 LT |
138 | */ |
139 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
140 | { | |
141 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
142 | int err = cmd->error; |
143 | ||
bd11e8bd | 144 | /* Flag re-tuning needed on CRC errors */ |
0a55f4ab DA |
145 | if (cmd->opcode != MMC_SEND_TUNING_BLOCK && |
146 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && | |
147 | !host->retune_crc_disable && | |
031277d4 | 148 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || |
bd11e8bd | 149 | (mrq->data && mrq->data->error == -EILSEQ) || |
031277d4 | 150 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
bd11e8bd AH |
151 | mmc_retune_needed(host); |
152 | ||
af517150 DB |
153 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
154 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
155 | cmd->retries = 0; | |
156 | } | |
157 | ||
5163af5a AH |
158 | if (host->ongoing_mrq == mrq) |
159 | host->ongoing_mrq = NULL; | |
160 | ||
161 | mmc_complete_cmd(mrq); | |
162 | ||
7962fc37 BW |
163 | trace_mmc_request_done(host, mrq); |
164 | ||
67b8360a LW |
165 | /* |
166 | * We list various conditions for the command to be considered | |
167 | * properly done: | |
168 | * | |
169 | * - There was no error, OK fine then | |
170 | * - We are not doing some kind of retry | |
171 | * - The card was removed (...so just complete everything no matter | |
172 | * if there are errors or retries) | |
173 | */ | |
174 | if (!err || !cmd->retries || mmc_card_removed(host->card)) { | |
1b676f70 PF |
175 | mmc_should_fail_request(host, mrq); |
176 | ||
5163af5a AH |
177 | if (!host->ongoing_mrq) |
178 | led_trigger_event(host->led, LED_OFF); | |
af8350c7 | 179 | |
fc75b708 AG |
180 | if (mrq->sbc) { |
181 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
182 | mmc_hostname(host), mrq->sbc->opcode, | |
183 | mrq->sbc->error, | |
184 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
185 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
186 | } | |
187 | ||
e4d21708 PO |
188 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
189 | mmc_hostname(host), cmd->opcode, err, | |
190 | cmd->resp[0], cmd->resp[1], | |
191 | cmd->resp[2], cmd->resp[3]); | |
192 | ||
193 | if (mrq->data) { | |
194 | pr_debug("%s: %d bytes transferred: %d\n", | |
195 | mmc_hostname(host), | |
196 | mrq->data->bytes_xfered, mrq->data->error); | |
197 | } | |
198 | ||
199 | if (mrq->stop) { | |
200 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
201 | mmc_hostname(host), mrq->stop->opcode, | |
202 | mrq->stop->error, | |
203 | mrq->stop->resp[0], mrq->stop->resp[1], | |
204 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
205 | } | |
1da177e4 | 206 | } |
67b8360a LW |
207 | /* |
208 | * Request starter must handle retries - see | |
209 | * mmc_wait_for_req_done(). | |
210 | */ | |
211 | if (mrq->done) | |
212 | mrq->done(mrq); | |
1da177e4 LT |
213 | } |
214 | ||
215 | EXPORT_SYMBOL(mmc_request_done); | |
216 | ||
90a81489 AH |
217 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
218 | { | |
219 | int err; | |
220 | ||
221 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
222 | err = mmc_retune(host); | |
223 | if (err) { | |
224 | mrq->cmd->error = err; | |
225 | mmc_request_done(host, mrq); | |
226 | return; | |
227 | } | |
228 | ||
5d3f6ef0 HG |
229 | /* |
230 | * For sdio rw commands we must wait for card busy otherwise some | |
231 | * sdio devices won't work properly. | |
f328c76e | 232 | * And bypass I/O abort, reset and bus suspend operations. |
5d3f6ef0 | 233 | */ |
f328c76e | 234 | if (sdio_is_io_busy(mrq->cmd->opcode, mrq->cmd->arg) && |
235 | host->ops->card_busy) { | |
5d3f6ef0 HG |
236 | int tries = 500; /* Wait aprox 500ms at maximum */ |
237 | ||
238 | while (host->ops->card_busy(host) && --tries) | |
239 | mmc_delay(1); | |
240 | ||
241 | if (tries == 0) { | |
242 | mrq->cmd->error = -EBUSY; | |
243 | mmc_request_done(host, mrq); | |
244 | return; | |
245 | } | |
246 | } | |
247 | ||
5163af5a AH |
248 | if (mrq->cap_cmd_during_tfr) { |
249 | host->ongoing_mrq = mrq; | |
250 | /* | |
251 | * Retry path could come through here without having waiting on | |
252 | * cmd_completion, so ensure it is reinitialised. | |
253 | */ | |
254 | reinit_completion(&mrq->cmd_completion); | |
255 | } | |
256 | ||
7962fc37 BW |
257 | trace_mmc_request_start(host, mrq); |
258 | ||
3e207c8c AH |
259 | if (host->cqe_on) |
260 | host->cqe_ops->cqe_off(host); | |
261 | ||
90a81489 AH |
262 | host->ops->request(host, mrq); |
263 | } | |
264 | ||
72a5af55 AH |
265 | static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq, |
266 | bool cqe) | |
1da177e4 | 267 | { |
7b2fd4f2 JC |
268 | if (mrq->sbc) { |
269 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
270 | mmc_hostname(host), mrq->sbc->opcode, | |
271 | mrq->sbc->arg, mrq->sbc->flags); | |
272 | } | |
273 | ||
4b67e63f | 274 | if (mrq->cmd) { |
72a5af55 AH |
275 | pr_debug("%s: starting %sCMD%u arg %08x flags %08x\n", |
276 | mmc_hostname(host), cqe ? "CQE direct " : "", | |
277 | mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags); | |
278 | } else if (cqe) { | |
279 | pr_debug("%s: starting CQE transfer for tag %d blkaddr %u\n", | |
280 | mmc_hostname(host), mrq->tag, mrq->data->blk_addr); | |
4b67e63f | 281 | } |
1da177e4 | 282 | |
e4d21708 PO |
283 | if (mrq->data) { |
284 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
285 | "tsac %d ms nsac %d\n", | |
286 | mmc_hostname(host), mrq->data->blksz, | |
287 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 288 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
289 | mrq->data->timeout_clks); |
290 | } | |
291 | ||
292 | if (mrq->stop) { | |
293 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
294 | mmc_hostname(host), mrq->stop->opcode, | |
295 | mrq->stop->arg, mrq->stop->flags); | |
296 | } | |
4b67e63f AH |
297 | } |
298 | ||
f34bdd2f | 299 | static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq) |
4b67e63f | 300 | { |
b044b1bc | 301 | unsigned int i, sz = 0; |
4b67e63f | 302 | struct scatterlist *sg; |
1da177e4 | 303 | |
f34bdd2f AH |
304 | if (mrq->cmd) { |
305 | mrq->cmd->error = 0; | |
306 | mrq->cmd->mrq = mrq; | |
307 | mrq->cmd->data = mrq->data; | |
308 | } | |
cce411e6 AG |
309 | if (mrq->sbc) { |
310 | mrq->sbc->error = 0; | |
311 | mrq->sbc->mrq = mrq; | |
312 | } | |
1da177e4 | 313 | if (mrq->data) { |
6ff897ff SL |
314 | if (mrq->data->blksz > host->max_blk_size || |
315 | mrq->data->blocks > host->max_blk_count || | |
316 | mrq->data->blocks * mrq->data->blksz > host->max_req_size) | |
317 | return -EINVAL; | |
b044b1bc | 318 | |
a84756c5 PO |
319 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
320 | sz += sg->length; | |
6ff897ff SL |
321 | if (sz != mrq->data->blocks * mrq->data->blksz) |
322 | return -EINVAL; | |
b044b1bc | 323 | |
1da177e4 LT |
324 | mrq->data->error = 0; |
325 | mrq->data->mrq = mrq; | |
326 | if (mrq->stop) { | |
327 | mrq->data->stop = mrq->stop; | |
328 | mrq->stop->error = 0; | |
329 | mrq->stop->mrq = mrq; | |
330 | } | |
331 | } | |
f34bdd2f AH |
332 | |
333 | return 0; | |
334 | } | |
335 | ||
cb39f61e | 336 | int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
f34bdd2f AH |
337 | { |
338 | int err; | |
339 | ||
d2383318 AH |
340 | init_completion(&mrq->cmd_completion); |
341 | ||
f34bdd2f AH |
342 | mmc_retune_hold(host); |
343 | ||
344 | if (mmc_card_removed(host->card)) | |
345 | return -ENOMEDIUM; | |
346 | ||
72a5af55 | 347 | mmc_mrq_pr_debug(host, mrq, false); |
f34bdd2f AH |
348 | |
349 | WARN_ON(!host->claimed); | |
350 | ||
351 | err = mmc_mrq_prep(host, mrq); | |
352 | if (err) | |
353 | return err; | |
354 | ||
66c036e0 | 355 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 356 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
357 | |
358 | return 0; | |
1da177e4 | 359 | } |
cb39f61e | 360 | EXPORT_SYMBOL(mmc_start_request); |
1da177e4 | 361 | |
1da177e4 LT |
362 | static void mmc_wait_done(struct mmc_request *mrq) |
363 | { | |
aa8b683a PF |
364 | complete(&mrq->completion); |
365 | } | |
366 | ||
5163af5a AH |
367 | static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) |
368 | { | |
369 | struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); | |
370 | ||
371 | /* | |
372 | * If there is an ongoing transfer, wait for the command line to become | |
373 | * available. | |
374 | */ | |
375 | if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) | |
376 | wait_for_completion(&ongoing_mrq->cmd_completion); | |
377 | } | |
378 | ||
956d9fd5 | 379 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 380 | { |
f100c1c2 AH |
381 | int err; |
382 | ||
5163af5a AH |
383 | mmc_wait_ongoing_tfr_cmd(host); |
384 | ||
aa8b683a PF |
385 | init_completion(&mrq->completion); |
386 | mrq->done = mmc_wait_done; | |
f100c1c2 AH |
387 | |
388 | err = mmc_start_request(host, mrq); | |
389 | if (err) { | |
390 | mrq->cmd->error = err; | |
5163af5a | 391 | mmc_complete_cmd(mrq); |
d3049504 | 392 | complete(&mrq->completion); |
d3049504 | 393 | } |
f100c1c2 AH |
394 | |
395 | return err; | |
aa8b683a PF |
396 | } |
397 | ||
5163af5a | 398 | void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 399 | { |
08a7e1df AH |
400 | struct mmc_command *cmd; |
401 | ||
402 | while (1) { | |
403 | wait_for_completion(&mrq->completion); | |
404 | ||
405 | cmd = mrq->cmd; | |
775a9362 | 406 | |
d3049504 AH |
407 | if (!cmd->error || !cmd->retries || |
408 | mmc_card_removed(host->card)) | |
08a7e1df AH |
409 | break; |
410 | ||
90a81489 AH |
411 | mmc_retune_recheck(host); |
412 | ||
08a7e1df AH |
413 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
414 | mmc_hostname(host), cmd->opcode, cmd->error); | |
415 | cmd->retries--; | |
416 | cmd->error = 0; | |
90a81489 | 417 | __mmc_start_request(host, mrq); |
08a7e1df | 418 | } |
90a81489 AH |
419 | |
420 | mmc_retune_release(host); | |
aa8b683a | 421 | } |
5163af5a AH |
422 | EXPORT_SYMBOL(mmc_wait_for_req_done); |
423 | ||
72a5af55 AH |
424 | /* |
425 | * mmc_cqe_start_req - Start a CQE request. | |
426 | * @host: MMC host to start the request | |
427 | * @mrq: request to start | |
428 | * | |
429 | * Start the request, re-tuning if needed and it is possible. Returns an error | |
430 | * code if the request fails to start or -EBUSY if CQE is busy. | |
431 | */ | |
432 | int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
433 | { | |
434 | int err; | |
435 | ||
436 | /* | |
437 | * CQE cannot process re-tuning commands. Caller must hold retuning | |
438 | * while CQE is in use. Re-tuning can happen here only when CQE has no | |
439 | * active requests i.e. this is the first. Note, re-tuning will call | |
440 | * ->cqe_off(). | |
441 | */ | |
442 | err = mmc_retune(host); | |
443 | if (err) | |
444 | goto out_err; | |
445 | ||
446 | mrq->host = host; | |
447 | ||
448 | mmc_mrq_pr_debug(host, mrq, true); | |
449 | ||
450 | err = mmc_mrq_prep(host, mrq); | |
451 | if (err) | |
452 | goto out_err; | |
453 | ||
454 | err = host->cqe_ops->cqe_request(host, mrq); | |
455 | if (err) | |
456 | goto out_err; | |
457 | ||
458 | trace_mmc_request_start(host, mrq); | |
459 | ||
460 | return 0; | |
461 | ||
462 | out_err: | |
463 | if (mrq->cmd) { | |
464 | pr_debug("%s: failed to start CQE direct CMD%u, error %d\n", | |
465 | mmc_hostname(host), mrq->cmd->opcode, err); | |
466 | } else { | |
467 | pr_debug("%s: failed to start CQE transfer for tag %d, error %d\n", | |
468 | mmc_hostname(host), mrq->tag, err); | |
469 | } | |
470 | return err; | |
471 | } | |
472 | EXPORT_SYMBOL(mmc_cqe_start_req); | |
473 | ||
474 | /** | |
475 | * mmc_cqe_request_done - CQE has finished processing an MMC request | |
476 | * @host: MMC host which completed request | |
477 | * @mrq: MMC request which completed | |
478 | * | |
479 | * CQE drivers should call this function when they have completed | |
480 | * their processing of a request. | |
481 | */ | |
482 | void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
483 | { | |
484 | mmc_should_fail_request(host, mrq); | |
485 | ||
486 | /* Flag re-tuning needed on CRC errors */ | |
487 | if ((mrq->cmd && mrq->cmd->error == -EILSEQ) || | |
488 | (mrq->data && mrq->data->error == -EILSEQ)) | |
489 | mmc_retune_needed(host); | |
490 | ||
491 | trace_mmc_request_done(host, mrq); | |
492 | ||
493 | if (mrq->cmd) { | |
494 | pr_debug("%s: CQE req done (direct CMD%u): %d\n", | |
495 | mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->error); | |
496 | } else { | |
497 | pr_debug("%s: CQE transfer done tag %d\n", | |
498 | mmc_hostname(host), mrq->tag); | |
499 | } | |
500 | ||
501 | if (mrq->data) { | |
502 | pr_debug("%s: %d bytes transferred: %d\n", | |
503 | mmc_hostname(host), | |
504 | mrq->data->bytes_xfered, mrq->data->error); | |
505 | } | |
506 | ||
507 | mrq->done(mrq); | |
508 | } | |
509 | EXPORT_SYMBOL(mmc_cqe_request_done); | |
510 | ||
511 | /** | |
512 | * mmc_cqe_post_req - CQE post process of a completed MMC request | |
513 | * @host: MMC host | |
514 | * @mrq: MMC request to be processed | |
515 | */ | |
516 | void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq) | |
517 | { | |
518 | if (host->cqe_ops->cqe_post_req) | |
519 | host->cqe_ops->cqe_post_req(host, mrq); | |
520 | } | |
521 | EXPORT_SYMBOL(mmc_cqe_post_req); | |
522 | ||
523 | /* Arbitrary 1 second timeout */ | |
524 | #define MMC_CQE_RECOVERY_TIMEOUT 1000 | |
525 | ||
526 | /* | |
527 | * mmc_cqe_recovery - Recover from CQE errors. | |
528 | * @host: MMC host to recover | |
529 | * | |
530 | * Recovery consists of stopping CQE, stopping eMMC, discarding the queue in | |
531 | * in eMMC, and discarding the queue in CQE. CQE must call | |
532 | * mmc_cqe_request_done() on all requests. An error is returned if the eMMC | |
533 | * fails to discard its queue. | |
534 | */ | |
535 | int mmc_cqe_recovery(struct mmc_host *host) | |
536 | { | |
537 | struct mmc_command cmd; | |
538 | int err; | |
539 | ||
540 | mmc_retune_hold_now(host); | |
541 | ||
542 | /* | |
543 | * Recovery is expected seldom, if at all, but it reduces performance, | |
544 | * so make sure it is not completely silent. | |
545 | */ | |
546 | pr_warn("%s: running CQE recovery\n", mmc_hostname(host)); | |
547 | ||
548 | host->cqe_ops->cqe_recovery_start(host); | |
549 | ||
550 | memset(&cmd, 0, sizeof(cmd)); | |
6b1dc622 ZY |
551 | cmd.opcode = MMC_STOP_TRANSMISSION; |
552 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; | |
72a5af55 | 553 | cmd.flags &= ~MMC_RSP_CRC; /* Ignore CRC */ |
6b1dc622 | 554 | cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT; |
72a5af55 AH |
555 | mmc_wait_for_cmd(host, &cmd, 0); |
556 | ||
557 | memset(&cmd, 0, sizeof(cmd)); | |
558 | cmd.opcode = MMC_CMDQ_TASK_MGMT; | |
559 | cmd.arg = 1; /* Discard entire queue */ | |
560 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; | |
561 | cmd.flags &= ~MMC_RSP_CRC; /* Ignore CRC */ | |
6b1dc622 | 562 | cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT; |
72a5af55 AH |
563 | err = mmc_wait_for_cmd(host, &cmd, 0); |
564 | ||
565 | host->cqe_ops->cqe_recovery_finish(host); | |
566 | ||
567 | mmc_retune_release(host); | |
568 | ||
569 | return err; | |
570 | } | |
571 | EXPORT_SYMBOL(mmc_cqe_recovery); | |
572 | ||
5163af5a AH |
573 | /** |
574 | * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done | |
575 | * @host: MMC host | |
576 | * @mrq: MMC request | |
577 | * | |
578 | * mmc_is_req_done() is used with requests that have | |
579 | * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after | |
580 | * starting a request and before waiting for it to complete. That is, | |
581 | * either in between calls to mmc_start_req(), or after mmc_wait_for_req() | |
582 | * and before mmc_wait_for_req_done(). If it is called at other times the | |
583 | * result is not meaningful. | |
584 | */ | |
585 | bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) | |
586 | { | |
126b6270 | 587 | return completion_done(&mrq->completion); |
5163af5a AH |
588 | } |
589 | EXPORT_SYMBOL(mmc_is_req_done); | |
aa8b683a | 590 | |
67a61c48 PO |
591 | /** |
592 | * mmc_wait_for_req - start a request and wait for completion | |
593 | * @host: MMC host to start command | |
594 | * @mrq: MMC request to start | |
595 | * | |
596 | * Start a new MMC custom command request for a host, and wait | |
5163af5a AH |
597 | * for the command to complete. In the case of 'cap_cmd_during_tfr' |
598 | * requests, the transfer is ongoing and the caller can issue further | |
599 | * commands that do not use the data lines, and then wait by calling | |
600 | * mmc_wait_for_req_done(). | |
601 | * Does not attempt to parse the response. | |
67a61c48 PO |
602 | */ |
603 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 604 | { |
aa8b683a | 605 | __mmc_start_req(host, mrq); |
5163af5a AH |
606 | |
607 | if (!mrq->cap_cmd_during_tfr) | |
608 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 609 | } |
1da177e4 LT |
610 | EXPORT_SYMBOL(mmc_wait_for_req); |
611 | ||
612 | /** | |
613 | * mmc_wait_for_cmd - start a command and wait for completion | |
614 | * @host: MMC host to start command | |
615 | * @cmd: MMC command to start | |
616 | * @retries: maximum number of retries | |
617 | * | |
618 | * Start a new MMC command for a host, and wait for the command | |
619 | * to complete. Return any error that occurred while the command | |
620 | * was executing. Do not attempt to parse the response. | |
621 | */ | |
622 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
623 | { | |
c7836d15 | 624 | struct mmc_request mrq = {}; |
1da177e4 | 625 | |
d84075c8 | 626 | WARN_ON(!host->claimed); |
1da177e4 | 627 | |
1da177e4 LT |
628 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
629 | cmd->retries = retries; | |
630 | ||
631 | mrq.cmd = cmd; | |
632 | cmd->data = NULL; | |
633 | ||
634 | mmc_wait_for_req(host, &mrq); | |
635 | ||
636 | return cmd->error; | |
637 | } | |
638 | ||
639 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
640 | ||
d773d725 RK |
641 | /** |
642 | * mmc_set_data_timeout - set the timeout for a data command | |
643 | * @data: data phase for command | |
644 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
645 | * |
646 | * Computes the data timeout parameters according to the | |
647 | * correct algorithm given the card type. | |
d773d725 | 648 | */ |
b146d26a | 649 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
650 | { |
651 | unsigned int mult; | |
652 | ||
e6f918bf PO |
653 | /* |
654 | * SDIO cards only define an upper 1 s limit on access. | |
655 | */ | |
656 | if (mmc_card_sdio(card)) { | |
657 | data->timeout_ns = 1000000000; | |
658 | data->timeout_clks = 0; | |
659 | return; | |
660 | } | |
661 | ||
d773d725 RK |
662 | /* |
663 | * SD cards use a 100 multiplier rather than 10 | |
664 | */ | |
665 | mult = mmc_card_sd(card) ? 100 : 10; | |
666 | ||
667 | /* | |
668 | * Scale up the multiplier (and therefore the timeout) by | |
669 | * the r2w factor for writes. | |
670 | */ | |
b146d26a | 671 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
672 | mult <<= card->csd.r2w_factor; |
673 | ||
4406ae21 SL |
674 | data->timeout_ns = card->csd.taac_ns * mult; |
675 | data->timeout_clks = card->csd.taac_clks * mult; | |
d773d725 RK |
676 | |
677 | /* | |
678 | * SD cards also have an upper limit on the timeout. | |
679 | */ | |
680 | if (mmc_card_sd(card)) { | |
681 | unsigned int timeout_us, limit_us; | |
682 | ||
683 | timeout_us = data->timeout_ns / 1000; | |
9eadcc05 | 684 | if (card->host->ios.clock) |
e9b86841 | 685 | timeout_us += data->timeout_clks * 1000 / |
9eadcc05 | 686 | (card->host->ios.clock / 1000); |
d773d725 | 687 | |
b146d26a | 688 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 689 | /* |
3bdc9ba8 PW |
690 | * The MMC spec "It is strongly recommended |
691 | * for hosts to implement more than 500ms | |
692 | * timeout value even if the card indicates | |
693 | * the 250ms maximum busy length." Even the | |
694 | * previous value of 300ms is known to be | |
695 | * insufficient for some cards. | |
493890e7 | 696 | */ |
3bdc9ba8 | 697 | limit_us = 3000000; |
d773d725 RK |
698 | else |
699 | limit_us = 100000; | |
700 | ||
fba68bd2 PL |
701 | /* |
702 | * SDHC cards always use these fixed values. | |
703 | */ | |
6ca2920d | 704 | if (timeout_us > limit_us) { |
d773d725 RK |
705 | data->timeout_ns = limit_us * 1000; |
706 | data->timeout_clks = 0; | |
707 | } | |
f7bf11a3 SW |
708 | |
709 | /* assign limit value if invalid */ | |
710 | if (timeout_us == 0) | |
711 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 712 | } |
6de5fc9c SNX |
713 | |
714 | /* | |
715 | * Some cards require longer data read timeout than indicated in CSD. | |
716 | * Address this by setting the read timeout to a "reasonably high" | |
32ecd320 | 717 | * value. For the cards tested, 600ms has proven enough. If necessary, |
6de5fc9c SNX |
718 | * this value can be increased if other problematic cards require this. |
719 | */ | |
720 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
32ecd320 | 721 | data->timeout_ns = 600000000; |
6de5fc9c SNX |
722 | data->timeout_clks = 0; |
723 | } | |
724 | ||
c0c88871 WM |
725 | /* |
726 | * Some cards need very high timeouts if driven in SPI mode. | |
727 | * The worst observed timeout was 900ms after writing a | |
728 | * continuous stream of data until the internal logic | |
729 | * overflowed. | |
730 | */ | |
731 | if (mmc_host_is_spi(card->host)) { | |
732 | if (data->flags & MMC_DATA_WRITE) { | |
733 | if (data->timeout_ns < 1000000000) | |
734 | data->timeout_ns = 1000000000; /* 1s */ | |
735 | } else { | |
736 | if (data->timeout_ns < 100000000) | |
737 | data->timeout_ns = 100000000; /* 100ms */ | |
738 | } | |
739 | } | |
d773d725 RK |
740 | } |
741 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
742 | ||
6c0cedd1 AH |
743 | /* |
744 | * Allow claiming an already claimed host if the context is the same or there is | |
745 | * no context but the task is the same. | |
746 | */ | |
747 | static inline bool mmc_ctx_matches(struct mmc_host *host, struct mmc_ctx *ctx, | |
748 | struct task_struct *task) | |
749 | { | |
750 | return host->claimer == ctx || | |
751 | (!ctx && task && host->claimer->task == task); | |
752 | } | |
753 | ||
754 | static inline void mmc_ctx_set_claimer(struct mmc_host *host, | |
755 | struct mmc_ctx *ctx, | |
756 | struct task_struct *task) | |
757 | { | |
758 | if (!host->claimer) { | |
759 | if (ctx) | |
760 | host->claimer = ctx; | |
761 | else | |
762 | host->claimer = &host->default_ctx; | |
763 | } | |
764 | if (task) | |
765 | host->claimer->task = task; | |
766 | } | |
767 | ||
1da177e4 | 768 | /** |
2342f332 | 769 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 770 | * @host: mmc host to claim |
6c0cedd1 AH |
771 | * @ctx: context that claims the host or NULL in which case the default |
772 | * context will be used | |
2342f332 | 773 | * @abort: whether or not the operation should be aborted |
1da177e4 | 774 | * |
2342f332 NP |
775 | * Claim a host for a set of operations. If @abort is non null and |
776 | * dereference a non-zero value then this will return prematurely with | |
777 | * that non-zero value without acquiring the lock. Returns zero | |
778 | * with the lock held otherwise. | |
1da177e4 | 779 | */ |
6c0cedd1 AH |
780 | int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx, |
781 | atomic_t *abort) | |
1da177e4 | 782 | { |
6c0cedd1 | 783 | struct task_struct *task = ctx ? NULL : current; |
1da177e4 LT |
784 | DECLARE_WAITQUEUE(wait, current); |
785 | unsigned long flags; | |
2342f332 | 786 | int stop; |
9250aea7 | 787 | bool pm = false; |
1da177e4 | 788 | |
cf795bfb PO |
789 | might_sleep(); |
790 | ||
1da177e4 LT |
791 | add_wait_queue(&host->wq, &wait); |
792 | spin_lock_irqsave(&host->lock, flags); | |
793 | while (1) { | |
794 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 795 | stop = abort ? atomic_read(abort) : 0; |
6c0cedd1 | 796 | if (stop || !host->claimed || mmc_ctx_matches(host, ctx, task)) |
1da177e4 LT |
797 | break; |
798 | spin_unlock_irqrestore(&host->lock, flags); | |
799 | schedule(); | |
800 | spin_lock_irqsave(&host->lock, flags); | |
801 | } | |
802 | set_current_state(TASK_RUNNING); | |
319a3f14 | 803 | if (!stop) { |
2342f332 | 804 | host->claimed = 1; |
6c0cedd1 | 805 | mmc_ctx_set_claimer(host, ctx, task); |
319a3f14 | 806 | host->claim_cnt += 1; |
9250aea7 UH |
807 | if (host->claim_cnt == 1) |
808 | pm = true; | |
319a3f14 | 809 | } else |
2342f332 | 810 | wake_up(&host->wq); |
1da177e4 LT |
811 | spin_unlock_irqrestore(&host->lock, flags); |
812 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
813 | |
814 | if (pm) | |
815 | pm_runtime_get_sync(mmc_dev(host)); | |
816 | ||
2342f332 | 817 | return stop; |
1da177e4 | 818 | } |
2342f332 | 819 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 820 | |
ab1efd27 | 821 | /** |
907d2e7c | 822 | * mmc_release_host - release a host |
ab1efd27 UH |
823 | * @host: mmc host to release |
824 | * | |
907d2e7c AH |
825 | * Release a MMC host, allowing others to claim the host |
826 | * for their operations. | |
ab1efd27 | 827 | */ |
907d2e7c | 828 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
829 | { |
830 | unsigned long flags; | |
831 | ||
907d2e7c AH |
832 | WARN_ON(!host->claimed); |
833 | ||
8ea926b2 | 834 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
835 | if (--host->claim_cnt) { |
836 | /* Release for nested claim */ | |
837 | spin_unlock_irqrestore(&host->lock, flags); | |
838 | } else { | |
839 | host->claimed = 0; | |
6c0cedd1 | 840 | host->claimer->task = NULL; |
319a3f14 AH |
841 | host->claimer = NULL; |
842 | spin_unlock_irqrestore(&host->lock, flags); | |
843 | wake_up(&host->wq); | |
9250aea7 | 844 | pm_runtime_mark_last_busy(mmc_dev(host)); |
7d5ef512 UH |
845 | if (host->caps & MMC_CAP_SYNC_RUNTIME_PM) |
846 | pm_runtime_put_sync_suspend(mmc_dev(host)); | |
847 | else | |
848 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 849 | } |
8ea926b2 | 850 | } |
1da177e4 LT |
851 | EXPORT_SYMBOL(mmc_release_host); |
852 | ||
e94cfef6 UH |
853 | /* |
854 | * This is a helper function, which fetches a runtime pm reference for the | |
855 | * card device and also claims the host. | |
856 | */ | |
6c0cedd1 | 857 | void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx) |
e94cfef6 UH |
858 | { |
859 | pm_runtime_get_sync(&card->dev); | |
6c0cedd1 | 860 | __mmc_claim_host(card->host, ctx, NULL); |
e94cfef6 UH |
861 | } |
862 | EXPORT_SYMBOL(mmc_get_card); | |
863 | ||
864 | /* | |
865 | * This is a helper function, which releases the host and drops the runtime | |
866 | * pm reference for the card device. | |
867 | */ | |
6c0cedd1 | 868 | void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx) |
e94cfef6 | 869 | { |
6c0cedd1 AH |
870 | struct mmc_host *host = card->host; |
871 | ||
872 | WARN_ON(ctx && host->claimer != ctx); | |
873 | ||
874 | mmc_release_host(host); | |
e94cfef6 UH |
875 | pm_runtime_mark_last_busy(&card->dev); |
876 | pm_runtime_put_autosuspend(&card->dev); | |
877 | } | |
878 | EXPORT_SYMBOL(mmc_put_card); | |
879 | ||
7ea239d9 PO |
880 | /* |
881 | * Internal function that does the actual ios call to the host driver, | |
882 | * optionally printing some debug output. | |
883 | */ | |
920e70c5 RK |
884 | static inline void mmc_set_ios(struct mmc_host *host) |
885 | { | |
886 | struct mmc_ios *ios = &host->ios; | |
887 | ||
cd9277c0 PO |
888 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
889 | "width %u timing %u\n", | |
920e70c5 RK |
890 | mmc_hostname(host), ios->clock, ios->bus_mode, |
891 | ios->power_mode, ios->chip_select, ios->vdd, | |
ed9feec7 | 892 | 1 << ios->bus_width, ios->timing); |
fba68bd2 | 893 | |
920e70c5 RK |
894 | host->ops->set_ios(host, ios); |
895 | } | |
896 | ||
7ea239d9 PO |
897 | /* |
898 | * Control chip select pin on a host. | |
899 | */ | |
da7fbe58 | 900 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 901 | { |
da7fbe58 PO |
902 | host->ios.chip_select = mode; |
903 | mmc_set_ios(host); | |
1da177e4 LT |
904 | } |
905 | ||
7ea239d9 PO |
906 | /* |
907 | * Sets the host clock to the highest possible frequency that | |
908 | * is below "hz". | |
909 | */ | |
9eadcc05 | 910 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 911 | { |
6a98f1e8 | 912 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
913 | |
914 | if (hz > host->f_max) | |
915 | hz = host->f_max; | |
916 | ||
917 | host->ios.clock = hz; | |
918 | mmc_set_ios(host); | |
919 | } | |
920 | ||
63e415c6 AH |
921 | int mmc_execute_tuning(struct mmc_card *card) |
922 | { | |
923 | struct mmc_host *host = card->host; | |
924 | u32 opcode; | |
925 | int err; | |
926 | ||
927 | if (!host->ops->execute_tuning) | |
928 | return 0; | |
929 | ||
3e207c8c AH |
930 | if (host->cqe_on) |
931 | host->cqe_ops->cqe_off(host); | |
932 | ||
63e415c6 AH |
933 | if (mmc_card_mmc(card)) |
934 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
935 | else | |
936 | opcode = MMC_SEND_TUNING_BLOCK; | |
937 | ||
63e415c6 | 938 | err = host->ops->execute_tuning(host, opcode); |
63e415c6 | 939 | |
77347eda | 940 | if (err) { |
07d97d87 RK |
941 | pr_err("%s: tuning execution failed: %d\n", |
942 | mmc_hostname(host), err); | |
77347eda | 943 | } else { |
8ffb2611 | 944 | mmc_retune_clear(host); |
79d5a65a | 945 | mmc_retune_enable(host); |
77347eda | 946 | } |
63e415c6 AH |
947 | |
948 | return err; | |
949 | } | |
950 | ||
7ea239d9 PO |
951 | /* |
952 | * Change the bus mode (open drain/push-pull) of a host. | |
953 | */ | |
954 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
955 | { | |
956 | host->ios.bus_mode = mode; | |
957 | mmc_set_ios(host); | |
958 | } | |
959 | ||
0f8d8ea6 AH |
960 | /* |
961 | * Change data bus width of a host. | |
962 | */ | |
963 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
964 | { | |
4c4cb171 PR |
965 | host->ios.bus_width = width; |
966 | mmc_set_ios(host); | |
0f8d8ea6 AH |
967 | } |
968 | ||
2d079c43 JR |
969 | /* |
970 | * Set initial state after a power cycle or a hw_reset. | |
971 | */ | |
972 | void mmc_set_initial_state(struct mmc_host *host) | |
973 | { | |
3e207c8c AH |
974 | if (host->cqe_on) |
975 | host->cqe_ops->cqe_off(host); | |
976 | ||
79d5a65a AH |
977 | mmc_retune_disable(host); |
978 | ||
2d079c43 JR |
979 | if (mmc_host_is_spi(host)) |
980 | host->ios.chip_select = MMC_CS_HIGH; | |
981 | else | |
982 | host->ios.chip_select = MMC_CS_DONTCARE; | |
983 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
984 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
985 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 986 | host->ios.drv_type = 0; |
81ac2af6 SL |
987 | host->ios.enhanced_strobe = false; |
988 | ||
989 | /* | |
990 | * Make sure we are in non-enhanced strobe mode before we | |
991 | * actually enable it in ext_csd. | |
992 | */ | |
993 | if ((host->caps2 & MMC_CAP2_HS400_ES) && | |
994 | host->ops->hs400_enhanced_strobe) | |
995 | host->ops->hs400_enhanced_strobe(host, &host->ios); | |
2d079c43 JR |
996 | |
997 | mmc_set_ios(host); | |
93f1c150 EB |
998 | |
999 | mmc_crypto_set_initial_state(host); | |
2d079c43 JR |
1000 | } |
1001 | ||
86e8286a AV |
1002 | /** |
1003 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1004 | * @vdd: voltage (mV) | |
1005 | * @low_bits: prefer low bits in boundary cases | |
1006 | * | |
1007 | * This function returns the OCR bit number according to the provided @vdd | |
1008 | * value. If conversion is not possible a negative errno value returned. | |
1009 | * | |
1010 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1011 | * on boundary voltages. For example, | |
1012 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1013 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1014 | * | |
1015 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1016 | */ | |
1017 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1018 | { | |
1019 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1020 | int bit; | |
1021 | ||
1022 | if (vdd < 1650 || vdd > 3600) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | if (vdd >= 1650 && vdd <= 1950) | |
1026 | return ilog2(MMC_VDD_165_195); | |
1027 | ||
1028 | if (low_bits) | |
1029 | vdd -= 1; | |
1030 | ||
1031 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1032 | bit = (vdd - 2000) / 100 + 8; | |
1033 | if (bit > max_bit) | |
1034 | return max_bit; | |
1035 | return bit; | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1040 | * @vdd_min: minimum voltage value (mV) | |
1041 | * @vdd_max: maximum voltage value (mV) | |
1042 | * | |
1043 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1044 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1045 | * | |
1046 | * Notes wrt boundary cases: | |
1047 | * This function sets the OCR bits for all boundary voltages, for example | |
1048 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1049 | * MMC_VDD_34_35 mask. | |
1050 | */ | |
1051 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1052 | { | |
1053 | u32 mask = 0; | |
1054 | ||
1055 | if (vdd_max < vdd_min) | |
1056 | return 0; | |
1057 | ||
1058 | /* Prefer high bits for the boundary vdd_max values. */ | |
1059 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1060 | if (vdd_max < 0) | |
1061 | return 0; | |
1062 | ||
1063 | /* Prefer low bits for the boundary vdd_min values. */ | |
1064 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1065 | if (vdd_min < 0) | |
1066 | return 0; | |
1067 | ||
1068 | /* Fill the mask, from max bit to min bit. */ | |
1069 | while (vdd_max >= vdd_min) | |
1070 | mask |= 1 << vdd_max--; | |
1071 | ||
1072 | return mask; | |
1073 | } | |
86e8286a | 1074 | |
25185f3f SH |
1075 | static int mmc_of_get_func_num(struct device_node *node) |
1076 | { | |
1077 | u32 reg; | |
1078 | int ret; | |
1079 | ||
1080 | ret = of_property_read_u32(node, "reg", ®); | |
1081 | if (ret < 0) | |
1082 | return ret; | |
1083 | ||
1084 | return reg; | |
1085 | } | |
1086 | ||
1087 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1088 | unsigned func_num) | |
1089 | { | |
1090 | struct device_node *node; | |
1091 | ||
1092 | if (!host->parent || !host->parent->of_node) | |
1093 | return NULL; | |
1094 | ||
1095 | for_each_child_of_node(host->parent->of_node, node) { | |
1096 | if (mmc_of_get_func_num(node) == func_num) | |
1097 | return node; | |
1098 | } | |
1099 | ||
1100 | return NULL; | |
1101 | } | |
1102 | ||
1da177e4 LT |
1103 | /* |
1104 | * Mask off any voltages we don't support and select | |
1105 | * the lowest voltage | |
1106 | */ | |
7ea239d9 | 1107 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1108 | { |
1109 | int bit; | |
1110 | ||
726d6f23 UH |
1111 | /* |
1112 | * Sanity check the voltages that the card claims to | |
1113 | * support. | |
1114 | */ | |
1115 | if (ocr & 0x7F) { | |
1116 | dev_warn(mmc_dev(host), | |
1117 | "card claims to support voltages below defined range\n"); | |
1118 | ocr &= ~0x7F; | |
1119 | } | |
1120 | ||
1da177e4 | 1121 | ocr &= host->ocr_avail; |
ce69d37b UH |
1122 | if (!ocr) { |
1123 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1124 | return 0; | |
1125 | } | |
1da177e4 | 1126 | |
ce69d37b UH |
1127 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1128 | bit = ffs(ocr) - 1; | |
63ef731a | 1129 | ocr &= 3 << bit; |
ce69d37b | 1130 | mmc_power_cycle(host, ocr); |
1da177e4 | 1131 | } else { |
ce69d37b UH |
1132 | bit = fls(ocr) - 1; |
1133 | ocr &= 3 << bit; | |
1134 | if (bit != host->ios.vdd) | |
1135 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | return ocr; | |
1139 | } | |
1140 | ||
4e74b6b3 | 1141 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
567c8903 JR |
1142 | { |
1143 | int err = 0; | |
1144 | int old_signal_voltage = host->ios.signal_voltage; | |
1145 | ||
1146 | host->ios.signal_voltage = signal_voltage; | |
9eadcc05 | 1147 | if (host->ops->start_signal_voltage_switch) |
567c8903 | 1148 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
567c8903 JR |
1149 | |
1150 | if (err) | |
1151 | host->ios.signal_voltage = old_signal_voltage; | |
1152 | ||
1153 | return err; | |
1154 | ||
1155 | } | |
1156 | ||
508c9864 UH |
1157 | void mmc_set_initial_signal_voltage(struct mmc_host *host) |
1158 | { | |
1159 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ | |
1160 | if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) | |
1161 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1162 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) | |
1163 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1164 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) | |
1165 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
1166 | } | |
1167 | ||
3f496afb AH |
1168 | int mmc_host_set_uhs_voltage(struct mmc_host *host) |
1169 | { | |
1170 | u32 clock; | |
1171 | ||
1172 | /* | |
1173 | * During a signal voltage level switch, the clock must be gated | |
1174 | * for 5 ms according to the SD spec | |
1175 | */ | |
1176 | clock = host->ios.clock; | |
1177 | host->ios.clock = 0; | |
1178 | mmc_set_ios(host); | |
1179 | ||
1180 | if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) | |
1181 | return -EAGAIN; | |
1182 | ||
1183 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ | |
1184 | mmc_delay(10); | |
1185 | host->ios.clock = clock; | |
1186 | mmc_set_ios(host); | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
2ed573b6 | 1191 | int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) |
f2119df6 | 1192 | { |
c7836d15 | 1193 | struct mmc_command cmd = {}; |
f2119df6 AN |
1194 | int err = 0; |
1195 | ||
0797e5f1 JR |
1196 | /* |
1197 | * If we cannot switch voltages, return failure so the caller | |
1198 | * can continue without UHS mode | |
1199 | */ | |
1200 | if (!host->ops->start_signal_voltage_switch) | |
1201 | return -EPERM; | |
1202 | if (!host->ops->card_busy) | |
6606110d JP |
1203 | pr_warn("%s: cannot verify signal voltage switch\n", |
1204 | mmc_hostname(host)); | |
0797e5f1 JR |
1205 | |
1206 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1207 | cmd.arg = 0; | |
1208 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1209 | ||
1210 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1211 | if (err) | |
147186f5 | 1212 | goto power_cycle; |
9eadcc05 UH |
1213 | |
1214 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1215 | return -EIO; | |
0797e5f1 | 1216 | |
0797e5f1 JR |
1217 | /* |
1218 | * The card should drive cmd and dat[0:3] low immediately | |
1219 | * after the response of cmd11, but wait 1 ms to be sure | |
1220 | */ | |
1221 | mmc_delay(1); | |
1222 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1223 | err = -EAGAIN; | |
1224 | goto power_cycle; | |
1225 | } | |
f2119df6 | 1226 | |
3f496afb | 1227 | if (mmc_host_set_uhs_voltage(host)) { |
0797e5f1 JR |
1228 | /* |
1229 | * Voltages may not have been switched, but we've already | |
1230 | * sent CMD11, so a power cycle is required anyway | |
1231 | */ | |
1232 | err = -EAGAIN; | |
1233 | goto power_cycle; | |
f2119df6 AN |
1234 | } |
1235 | ||
0797e5f1 JR |
1236 | /* Wait for at least 1 ms according to spec */ |
1237 | mmc_delay(1); | |
1238 | ||
1239 | /* | |
1240 | * Failure to switch is indicated by the card holding | |
1241 | * dat[0:3] low | |
1242 | */ | |
1243 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1244 | err = -EAGAIN; | |
1245 | ||
1246 | power_cycle: | |
1247 | if (err) { | |
1248 | pr_debug("%s: Signal voltage switch failed, " | |
1249 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1250 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1251 | } |
1252 | ||
0797e5f1 | 1253 | return err; |
f2119df6 AN |
1254 | } |
1255 | ||
b57c43ad | 1256 | /* |
7ea239d9 | 1257 | * Select timing parameters for host. |
b57c43ad | 1258 | */ |
7ea239d9 | 1259 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1260 | { |
7ea239d9 PO |
1261 | host->ios.timing = timing; |
1262 | mmc_set_ios(host); | |
b57c43ad PO |
1263 | } |
1264 | ||
d6d50a15 AN |
1265 | /* |
1266 | * Select appropriate driver type for host. | |
1267 | */ | |
1268 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1269 | { | |
1270 | host->ios.drv_type = drv_type; | |
1271 | mmc_set_ios(host); | |
1272 | } | |
1273 | ||
e23350b3 AH |
1274 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1275 | int card_drv_type, int *drv_type) | |
1276 | { | |
1277 | struct mmc_host *host = card->host; | |
1278 | int host_drv_type = SD_DRIVER_TYPE_B; | |
e23350b3 AH |
1279 | |
1280 | *drv_type = 0; | |
1281 | ||
1282 | if (!host->ops->select_drive_strength) | |
1283 | return 0; | |
1284 | ||
1285 | /* Use SD definition of driver strength for hosts */ | |
1286 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1287 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1288 | ||
1289 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1290 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1291 | ||
1292 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1293 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1294 | ||
1295 | /* | |
1296 | * The drive strength that the hardware can support | |
1297 | * depends on the board design. Pass the appropriate | |
1298 | * information and let the hardware specific code | |
1299 | * return what is possible given the options | |
1300 | */ | |
9eadcc05 UH |
1301 | return host->ops->select_drive_strength(card, max_dtr, |
1302 | host_drv_type, | |
1303 | card_drv_type, | |
1304 | drv_type); | |
e23350b3 AH |
1305 | } |
1306 | ||
1da177e4 | 1307 | /* |
45f8245b RK |
1308 | * Apply power to the MMC stack. This is a two-stage process. |
1309 | * First, we enable power to the card without the clock running. | |
1310 | * We then wait a bit for the power to stabilise. Finally, | |
1311 | * enable the bus drivers and clock to the card. | |
1312 | * | |
1313 | * We must _NOT_ enable the clock prior to power stablising. | |
1314 | * | |
1315 | * If a host does all the power sequencing itself, ignore the | |
1316 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1317 | */ |
4a065193 | 1318 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1319 | { |
fa550189 UH |
1320 | if (host->ios.power_mode == MMC_POWER_ON) |
1321 | return; | |
1322 | ||
3aa8793f UH |
1323 | mmc_pwrseq_pre_power_on(host); |
1324 | ||
4a065193 | 1325 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1326 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1327 | /* Set initial state and call mmc_set_ios */ |
1328 | mmc_set_initial_state(host); | |
1da177e4 | 1329 | |
508c9864 | 1330 | mmc_set_initial_signal_voltage(host); |
108ecc4c | 1331 | |
f9996aee PO |
1332 | /* |
1333 | * This delay should be sufficient to allow the power supply | |
1334 | * to reach the minimum voltage. | |
1335 | */ | |
6d796c68 | 1336 | mmc_delay(host->ios.power_delay_ms); |
1da177e4 | 1337 | |
4febb7e2 UH |
1338 | mmc_pwrseq_post_power_on(host); |
1339 | ||
88ae8b86 | 1340 | host->ios.clock = host->f_init; |
8dfd0374 | 1341 | |
1da177e4 | 1342 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1343 | mmc_set_ios(host); |
1da177e4 | 1344 | |
f9996aee PO |
1345 | /* |
1346 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1347 | * time required to reach a stable voltage. | |
1348 | */ | |
6d796c68 | 1349 | mmc_delay(host->ios.power_delay_ms); |
1da177e4 LT |
1350 | } |
1351 | ||
7f7e4129 | 1352 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1353 | { |
fa550189 UH |
1354 | if (host->ios.power_mode == MMC_POWER_OFF) |
1355 | return; | |
1356 | ||
3aa8793f UH |
1357 | mmc_pwrseq_power_off(host); |
1358 | ||
1da177e4 LT |
1359 | host->ios.clock = 0; |
1360 | host->ios.vdd = 0; | |
b33d46c3 | 1361 | |
1da177e4 | 1362 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1363 | /* Set initial state and call mmc_set_ios */ |
1364 | mmc_set_initial_state(host); | |
778e277c | 1365 | |
041beb1d DD |
1366 | /* |
1367 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1368 | * XO-1.5, require a short delay after poweroff before the card | |
1369 | * can be successfully turned on again. | |
1370 | */ | |
1371 | mmc_delay(1); | |
1da177e4 LT |
1372 | } |
1373 | ||
4a065193 | 1374 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1375 | { |
1376 | mmc_power_off(host); | |
1377 | /* Wait at least 1 ms according to SD spec */ | |
1378 | mmc_delay(1); | |
4a065193 | 1379 | mmc_power_up(host, ocr); |
276e090f JR |
1380 | } |
1381 | ||
1da177e4 | 1382 | /* |
7ea239d9 PO |
1383 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1384 | * host at any given time. | |
1da177e4 | 1385 | */ |
7ea239d9 | 1386 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1387 | { |
7ea239d9 | 1388 | host->bus_ops = ops; |
b57c43ad PO |
1389 | } |
1390 | ||
7ea239d9 | 1391 | /* |
7f7e4129 | 1392 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1393 | */ |
1394 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1395 | { |
e9ce2ce1 | 1396 | host->bus_ops = NULL; |
1da177e4 LT |
1397 | } |
1398 | ||
2ac55d5e | 1399 | void _mmc_detect_change(struct mmc_host *host, unsigned long delay, bool cd_irq) |
bbd43682 | 1400 | { |
bbd43682 | 1401 | /* |
b52fb259 UH |
1402 | * Prevent system sleep for 5s to allow user space to consume the |
1403 | * corresponding uevent. This is especially useful, when CD irq is used | |
1404 | * as a system wakeup, but doesn't hurt in other cases. | |
bbd43682 | 1405 | */ |
b52fb259 UH |
1406 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL)) |
1407 | __pm_wakeup_event(host->ws, 5000); | |
bbd43682 UH |
1408 | |
1409 | host->detect_change = 1; | |
1410 | mmc_schedule_delayed_work(&host->detect, delay); | |
1411 | } | |
1412 | ||
1da177e4 LT |
1413 | /** |
1414 | * mmc_detect_change - process change of state on a MMC socket | |
1415 | * @host: host which changed state. | |
8dc00335 | 1416 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1417 | * |
67a61c48 PO |
1418 | * MMC drivers should call this when they detect a card has been |
1419 | * inserted or removed. The MMC layer will confirm that any | |
1420 | * present card is still functional, and initialize any newly | |
1421 | * inserted. | |
1da177e4 | 1422 | */ |
8dc00335 | 1423 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1424 | { |
bbd43682 | 1425 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1426 | } |
1da177e4 LT |
1427 | EXPORT_SYMBOL(mmc_detect_change); |
1428 | ||
dfe86cba AH |
1429 | void mmc_init_erase(struct mmc_card *card) |
1430 | { | |
1431 | unsigned int sz; | |
1432 | ||
1433 | if (is_power_of_2(card->erase_size)) | |
1434 | card->erase_shift = ffs(card->erase_size) - 1; | |
1435 | else | |
1436 | card->erase_shift = 0; | |
1437 | ||
1438 | /* | |
1439 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1440 | * card. That is not desirable because it can take a long time | |
1441 | * (minutes) potentially delaying more important I/O, and also the | |
1442 | * timeout calculations become increasingly hugely over-estimated. | |
1443 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1444 | * to that size and alignment. | |
1445 | * | |
1446 | * For SD cards that define Allocation Unit size, limit erases to one | |
c6d8fd61 GG |
1447 | * Allocation Unit at a time. |
1448 | * For MMC, have a stab at ai good value and for modern cards it will | |
1449 | * end up being 4MiB. Note that if the value is too small, it can end | |
1450 | * up taking longer to erase. Also note, erase_size is already set to | |
1451 | * High Capacity Erase Size if available when this function is called. | |
dfe86cba AH |
1452 | */ |
1453 | if (mmc_card_sd(card) && card->ssr.au) { | |
1454 | card->pref_erase = card->ssr.au; | |
1455 | card->erase_shift = ffs(card->ssr.au) - 1; | |
cc8aa7de | 1456 | } else if (card->erase_size) { |
dfe86cba AH |
1457 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1458 | if (sz < 128) | |
1459 | card->pref_erase = 512 * 1024 / 512; | |
1460 | else if (sz < 512) | |
1461 | card->pref_erase = 1024 * 1024 / 512; | |
1462 | else if (sz < 1024) | |
1463 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1464 | else | |
1465 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1466 | if (card->pref_erase < card->erase_size) | |
1467 | card->pref_erase = card->erase_size; | |
1468 | else { | |
1469 | sz = card->pref_erase % card->erase_size; | |
1470 | if (sz) | |
1471 | card->pref_erase += card->erase_size - sz; | |
1472 | } | |
cc8aa7de CD |
1473 | } else |
1474 | card->pref_erase = 0; | |
dfe86cba AH |
1475 | } |
1476 | ||
eaa02f75 AW |
1477 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1478 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1479 | { |
1480 | unsigned int erase_timeout; | |
1481 | ||
7194efb8 AH |
1482 | if (arg == MMC_DISCARD_ARG || |
1483 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1484 | erase_timeout = card->ext_csd.trim_timeout; | |
1485 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1486 | /* High Capacity Erase Group Size uses HC timeouts */ |
1487 | if (arg == MMC_TRIM_ARG) | |
1488 | erase_timeout = card->ext_csd.trim_timeout; | |
1489 | else | |
1490 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1491 | } else { | |
1492 | /* CSD Erase Group Size uses write timeout */ | |
1493 | unsigned int mult = (10 << card->csd.r2w_factor); | |
4406ae21 | 1494 | unsigned int timeout_clks = card->csd.taac_clks * mult; |
dfe86cba AH |
1495 | unsigned int timeout_us; |
1496 | ||
4406ae21 SL |
1497 | /* Avoid overflow: e.g. taac_ns=80000000 mult=1280 */ |
1498 | if (card->csd.taac_ns < 1000000) | |
1499 | timeout_us = (card->csd.taac_ns * mult) / 1000; | |
dfe86cba | 1500 | else |
4406ae21 | 1501 | timeout_us = (card->csd.taac_ns / 1000) * mult; |
dfe86cba AH |
1502 | |
1503 | /* | |
1504 | * ios.clock is only a target. The real clock rate might be | |
1505 | * less but not that much less, so fudge it by multiplying by 2. | |
1506 | */ | |
1507 | timeout_clks <<= 1; | |
1508 | timeout_us += (timeout_clks * 1000) / | |
9eadcc05 | 1509 | (card->host->ios.clock / 1000); |
dfe86cba AH |
1510 | |
1511 | erase_timeout = timeout_us / 1000; | |
1512 | ||
1513 | /* | |
1514 | * Theoretically, the calculation could underflow so round up | |
1515 | * to 1ms in that case. | |
1516 | */ | |
1517 | if (!erase_timeout) | |
1518 | erase_timeout = 1; | |
1519 | } | |
1520 | ||
1521 | /* Multiplier for secure operations */ | |
1522 | if (arg & MMC_SECURE_ARGS) { | |
1523 | if (arg == MMC_SECURE_ERASE_ARG) | |
1524 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1525 | else | |
1526 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1527 | } | |
1528 | ||
1529 | erase_timeout *= qty; | |
1530 | ||
1531 | /* | |
1532 | * Ensure at least a 1 second timeout for SPI as per | |
1533 | * 'mmc_set_data_timeout()' | |
1534 | */ | |
1535 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
1536 | erase_timeout = 1000; | |
1537 | ||
eaa02f75 | 1538 | return erase_timeout; |
dfe86cba AH |
1539 | } |
1540 | ||
eaa02f75 AW |
1541 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
1542 | unsigned int arg, | |
1543 | unsigned int qty) | |
dfe86cba | 1544 | { |
eaa02f75 AW |
1545 | unsigned int erase_timeout; |
1546 | ||
ad9be7ff AA |
1547 | /* for DISCARD none of the below calculation applies. |
1548 | * the busy timeout is 250msec per discard command. | |
1549 | */ | |
1550 | if (arg == SD_DISCARD_ARG) | |
1551 | return SD_DISCARD_TIMEOUT_MS; | |
1552 | ||
dfe86cba AH |
1553 | if (card->ssr.erase_timeout) { |
1554 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
1555 | erase_timeout = card->ssr.erase_timeout * qty + |
1556 | card->ssr.erase_offset; | |
dfe86cba AH |
1557 | } else { |
1558 | /* | |
1559 | * Erase timeout not specified in SD Status Register (SSR) so | |
1560 | * use 250ms per write block. | |
1561 | */ | |
eaa02f75 | 1562 | erase_timeout = 250 * qty; |
dfe86cba AH |
1563 | } |
1564 | ||
1565 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
1566 | if (erase_timeout < 1000) |
1567 | erase_timeout = 1000; | |
1568 | ||
1569 | return erase_timeout; | |
dfe86cba AH |
1570 | } |
1571 | ||
eaa02f75 AW |
1572 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
1573 | unsigned int arg, | |
1574 | unsigned int qty) | |
dfe86cba AH |
1575 | { |
1576 | if (mmc_card_sd(card)) | |
eaa02f75 | 1577 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 1578 | else |
eaa02f75 | 1579 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1580 | } |
1581 | ||
1582 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
1583 | unsigned int to, unsigned int arg) | |
1584 | { | |
c7836d15 | 1585 | struct mmc_command cmd = {}; |
bb4eecf2 | 1586 | unsigned int qty = 0, busy_timeout = 0; |
e62f1e0b | 1587 | bool use_r1b_resp; |
dfe86cba AH |
1588 | int err; |
1589 | ||
8f11d106 AH |
1590 | mmc_retune_hold(card->host); |
1591 | ||
dfe86cba AH |
1592 | /* |
1593 | * qty is used to calculate the erase timeout which depends on how many | |
1594 | * erase groups (or allocation units in SD terminology) are affected. | |
1595 | * We count erasing part of an erase group as one erase group. | |
1596 | * For SD, the allocation units are always a power of 2. For MMC, the | |
1597 | * erase group size is almost certainly also power of 2, but it does not | |
1598 | * seem to insist on that in the JEDEC standard, so we fall back to | |
1599 | * division in that case. SD may not specify an allocation unit size, | |
1600 | * in which case the timeout is based on the number of write blocks. | |
1601 | * | |
1602 | * Note that the timeout for secure trim 2 will only be correct if the | |
1603 | * number of erase groups specified is the same as the total of all | |
1604 | * preceding secure trim 1 commands. Since the power may have been | |
1605 | * lost since the secure trim 1 commands occurred, it is generally | |
1606 | * impossible to calculate the secure trim 2 timeout correctly. | |
1607 | */ | |
1608 | if (card->erase_shift) | |
1609 | qty += ((to >> card->erase_shift) - | |
1610 | (from >> card->erase_shift)) + 1; | |
1611 | else if (mmc_card_sd(card)) | |
1612 | qty += to - from + 1; | |
1613 | else | |
1614 | qty += ((to / card->erase_size) - | |
1615 | (from / card->erase_size)) + 1; | |
1616 | ||
1617 | if (!mmc_card_blockaddr(card)) { | |
1618 | from <<= 9; | |
1619 | to <<= 9; | |
1620 | } | |
1621 | ||
dfe86cba AH |
1622 | if (mmc_card_sd(card)) |
1623 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
1624 | else | |
1625 | cmd.opcode = MMC_ERASE_GROUP_START; | |
1626 | cmd.arg = from; | |
1627 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1628 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1629 | if (err) { | |
a3c76eb9 | 1630 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 1631 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 1632 | err = -EIO; |
dfe86cba AH |
1633 | goto out; |
1634 | } | |
1635 | ||
1636 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1637 | if (mmc_card_sd(card)) | |
1638 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
1639 | else | |
1640 | cmd.opcode = MMC_ERASE_GROUP_END; | |
1641 | cmd.arg = to; | |
1642 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1643 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1644 | if (err) { | |
a3c76eb9 | 1645 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 1646 | err, cmd.resp[0]); |
67716327 | 1647 | err = -EIO; |
dfe86cba AH |
1648 | goto out; |
1649 | } | |
1650 | ||
1651 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1652 | cmd.opcode = MMC_ERASE; | |
1653 | cmd.arg = arg; | |
bb4eecf2 | 1654 | busy_timeout = mmc_erase_timeout(card, arg, qty); |
e62f1e0b | 1655 | use_r1b_resp = mmc_prepare_busy_cmd(card->host, &cmd, busy_timeout); |
bb4eecf2 | 1656 | |
dfe86cba AH |
1657 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
1658 | if (err) { | |
a3c76eb9 | 1659 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
1660 | err, cmd.resp[0]); |
1661 | err = -EIO; | |
1662 | goto out; | |
1663 | } | |
1664 | ||
1665 | if (mmc_host_is_spi(card->host)) | |
1666 | goto out; | |
1667 | ||
bb4eecf2 BW |
1668 | /* |
1669 | * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling | |
1670 | * shall be avoided. | |
1671 | */ | |
1672 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) | |
1673 | goto out; | |
1674 | ||
0d84c3e6 | 1675 | /* Let's poll to find out when the erase operation completes. */ |
04f967ad | 1676 | err = mmc_poll_for_busy(card, busy_timeout, false, MMC_BUSY_ERASE); |
8fee476b | 1677 | |
dfe86cba | 1678 | out: |
8f11d106 | 1679 | mmc_retune_release(card->host); |
dfe86cba AH |
1680 | return err; |
1681 | } | |
1682 | ||
71085123 BW |
1683 | static unsigned int mmc_align_erase_size(struct mmc_card *card, |
1684 | unsigned int *from, | |
1685 | unsigned int *to, | |
1686 | unsigned int nr) | |
1687 | { | |
1688 | unsigned int from_new = *from, nr_new = nr, rem; | |
1689 | ||
6c689886 BW |
1690 | /* |
1691 | * When the 'card->erase_size' is power of 2, we can use round_up/down() | |
1692 | * to align the erase size efficiently. | |
1693 | */ | |
1694 | if (is_power_of_2(card->erase_size)) { | |
1695 | unsigned int temp = from_new; | |
1696 | ||
1697 | from_new = round_up(temp, card->erase_size); | |
1698 | rem = from_new - temp; | |
1699 | ||
71085123 BW |
1700 | if (nr_new > rem) |
1701 | nr_new -= rem; | |
1702 | else | |
1703 | return 0; | |
71085123 | 1704 | |
6c689886 BW |
1705 | nr_new = round_down(nr_new, card->erase_size); |
1706 | } else { | |
1707 | rem = from_new % card->erase_size; | |
1708 | if (rem) { | |
1709 | rem = card->erase_size - rem; | |
1710 | from_new += rem; | |
1711 | if (nr_new > rem) | |
1712 | nr_new -= rem; | |
1713 | else | |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | rem = nr_new % card->erase_size; | |
1718 | if (rem) | |
1719 | nr_new -= rem; | |
1720 | } | |
71085123 BW |
1721 | |
1722 | if (nr_new == 0) | |
1723 | return 0; | |
1724 | ||
1725 | *to = from_new + nr_new; | |
1726 | *from = from_new; | |
1727 | ||
1728 | return nr_new; | |
1729 | } | |
1730 | ||
dfe86cba AH |
1731 | /** |
1732 | * mmc_erase - erase sectors. | |
1733 | * @card: card to erase | |
1734 | * @from: first sector to erase | |
1735 | * @nr: number of sectors to erase | |
bc47e2f6 | 1736 | * @arg: erase command argument |
dfe86cba AH |
1737 | * |
1738 | * Caller must claim host before calling this function. | |
1739 | */ | |
1740 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
1741 | unsigned int arg) | |
1742 | { | |
1743 | unsigned int rem, to = from + nr; | |
642c28ab | 1744 | int err; |
dfe86cba | 1745 | |
94fe2580 | 1746 | if (!(card->csd.cmdclass & CCC_ERASE)) |
dfe86cba AH |
1747 | return -EOPNOTSUPP; |
1748 | ||
1749 | if (!card->erase_size) | |
1750 | return -EOPNOTSUPP; | |
1751 | ||
bc47e2f6 | 1752 | if (mmc_card_sd(card) && arg != SD_ERASE_ARG && arg != SD_DISCARD_ARG) |
dfe86cba AH |
1753 | return -EOPNOTSUPP; |
1754 | ||
bc47e2f6 | 1755 | if (mmc_card_mmc(card) && (arg & MMC_SECURE_ARGS) && |
dfe86cba AH |
1756 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) |
1757 | return -EOPNOTSUPP; | |
1758 | ||
bc47e2f6 | 1759 | if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) && |
dfe86cba AH |
1760 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) |
1761 | return -EOPNOTSUPP; | |
1762 | ||
1763 | if (arg == MMC_SECURE_ERASE_ARG) { | |
1764 | if (from % card->erase_size || nr % card->erase_size) | |
1765 | return -EINVAL; | |
1766 | } | |
1767 | ||
71085123 BW |
1768 | if (arg == MMC_ERASE_ARG) |
1769 | nr = mmc_align_erase_size(card, &from, &to, nr); | |
dfe86cba AH |
1770 | |
1771 | if (nr == 0) | |
1772 | return 0; | |
1773 | ||
dfe86cba AH |
1774 | if (to <= from) |
1775 | return -EINVAL; | |
1776 | ||
1777 | /* 'from' and 'to' are inclusive */ | |
1778 | to -= 1; | |
1779 | ||
642c28ab DJ |
1780 | /* |
1781 | * Special case where only one erase-group fits in the timeout budget: | |
1782 | * If the region crosses an erase-group boundary on this particular | |
1783 | * case, we will be trimming more than one erase-group which, does not | |
1784 | * fit in the timeout budget of the controller, so we need to split it | |
1785 | * and call mmc_do_erase() twice if necessary. This special case is | |
1786 | * identified by the card->eg_boundary flag. | |
1787 | */ | |
22d7e85f RG |
1788 | rem = card->erase_size - (from % card->erase_size); |
1789 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
1790 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
1791 | from += rem; | |
1792 | if ((err) || (to <= from)) | |
1793 | return err; | |
1794 | } | |
1795 | ||
dfe86cba AH |
1796 | return mmc_do_erase(card, from, to, arg); |
1797 | } | |
1798 | EXPORT_SYMBOL(mmc_erase); | |
1799 | ||
1800 | int mmc_can_erase(struct mmc_card *card) | |
1801 | { | |
94fe2580 | 1802 | if (card->csd.cmdclass & CCC_ERASE && card->erase_size) |
dfe86cba AH |
1803 | return 1; |
1804 | return 0; | |
1805 | } | |
1806 | EXPORT_SYMBOL(mmc_can_erase); | |
1807 | ||
1808 | int mmc_can_trim(struct mmc_card *card) | |
1809 | { | |
b5b4ff0a SL |
1810 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
1811 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
1812 | return 1; |
1813 | return 0; | |
1814 | } | |
1815 | EXPORT_SYMBOL(mmc_can_trim); | |
1816 | ||
b3bf9153 KP |
1817 | int mmc_can_discard(struct mmc_card *card) |
1818 | { | |
1819 | /* | |
1820 | * As there's no way to detect the discard support bit at v4.5 | |
1821 | * use the s/w feature support filed. | |
1822 | */ | |
1823 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
1824 | return 1; | |
1825 | return 0; | |
1826 | } | |
1827 | EXPORT_SYMBOL(mmc_can_discard); | |
1828 | ||
d9ddd629 KP |
1829 | int mmc_can_sanitize(struct mmc_card *card) |
1830 | { | |
28302812 AH |
1831 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
1832 | return 0; | |
d9ddd629 KP |
1833 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
1834 | return 1; | |
1835 | return 0; | |
1836 | } | |
d9ddd629 | 1837 | |
dfe86cba AH |
1838 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
1839 | { | |
5204d00f LC |
1840 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
1841 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
1842 | return 1; |
1843 | return 0; | |
1844 | } | |
1845 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
1846 | ||
1847 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
1848 | unsigned int nr) | |
1849 | { | |
1850 | if (!card->erase_size) | |
1851 | return 0; | |
1852 | if (from % card->erase_size || nr % card->erase_size) | |
1853 | return 0; | |
1854 | return 1; | |
1855 | } | |
1856 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 1857 | |
e056a1b5 AH |
1858 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
1859 | unsigned int arg) | |
1860 | { | |
1861 | struct mmc_host *host = card->host; | |
bb4eecf2 | 1862 | unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; |
e056a1b5 | 1863 | unsigned int last_timeout = 0; |
12182aff UH |
1864 | unsigned int max_busy_timeout = host->max_busy_timeout ? |
1865 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; | |
e056a1b5 | 1866 | |
bb4eecf2 | 1867 | if (card->erase_shift) { |
e056a1b5 | 1868 | max_qty = UINT_MAX >> card->erase_shift; |
bb4eecf2 BW |
1869 | min_qty = card->pref_erase >> card->erase_shift; |
1870 | } else if (mmc_card_sd(card)) { | |
e056a1b5 | 1871 | max_qty = UINT_MAX; |
bb4eecf2 BW |
1872 | min_qty = card->pref_erase; |
1873 | } else { | |
e056a1b5 | 1874 | max_qty = UINT_MAX / card->erase_size; |
bb4eecf2 BW |
1875 | min_qty = card->pref_erase / card->erase_size; |
1876 | } | |
e056a1b5 | 1877 | |
bb4eecf2 BW |
1878 | /* |
1879 | * We should not only use 'host->max_busy_timeout' as the limitation | |
1880 | * when deciding the max discard sectors. We should set a balance value | |
1881 | * to improve the erase speed, and it can not get too long timeout at | |
1882 | * the same time. | |
1883 | * | |
1884 | * Here we set 'card->pref_erase' as the minimal discard sectors no | |
1885 | * matter what size of 'host->max_busy_timeout', but if the | |
1886 | * 'host->max_busy_timeout' is large enough for more discard sectors, | |
1887 | * then we can continue to increase the max discard sectors until we | |
12182aff UH |
1888 | * get a balance value. In cases when the 'host->max_busy_timeout' |
1889 | * isn't specified, use the default max erase timeout. | |
bb4eecf2 | 1890 | */ |
e056a1b5 AH |
1891 | do { |
1892 | y = 0; | |
1893 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
1894 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
bb4eecf2 | 1895 | |
12182aff | 1896 | if (qty + x > min_qty && timeout > max_busy_timeout) |
e056a1b5 | 1897 | break; |
bb4eecf2 | 1898 | |
e056a1b5 AH |
1899 | if (timeout < last_timeout) |
1900 | break; | |
1901 | last_timeout = timeout; | |
1902 | y = x; | |
1903 | } | |
1904 | qty += y; | |
1905 | } while (y); | |
1906 | ||
1907 | if (!qty) | |
1908 | return 0; | |
1909 | ||
642c28ab DJ |
1910 | /* |
1911 | * When specifying a sector range to trim, chances are we might cross | |
1912 | * an erase-group boundary even if the amount of sectors is less than | |
1913 | * one erase-group. | |
1914 | * If we can only fit one erase-group in the controller timeout budget, | |
1915 | * we have to care that erase-group boundaries are not crossed by a | |
1916 | * single trim operation. We flag that special case with "eg_boundary". | |
1917 | * In all other cases we can just decrement qty and pretend that we | |
1918 | * always touch (qty + 1) erase-groups as a simple optimization. | |
1919 | */ | |
e056a1b5 | 1920 | if (qty == 1) |
642c28ab DJ |
1921 | card->eg_boundary = 1; |
1922 | else | |
1923 | qty--; | |
e056a1b5 AH |
1924 | |
1925 | /* Convert qty to sectors */ | |
1926 | if (card->erase_shift) | |
642c28ab | 1927 | max_discard = qty << card->erase_shift; |
e056a1b5 | 1928 | else if (mmc_card_sd(card)) |
642c28ab | 1929 | max_discard = qty + 1; |
e056a1b5 | 1930 | else |
642c28ab | 1931 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
1932 | |
1933 | return max_discard; | |
1934 | } | |
1935 | ||
1936 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
1937 | { | |
1938 | struct mmc_host *host = card->host; | |
1939 | unsigned int max_discard, max_trim; | |
1940 | ||
e056a1b5 AH |
1941 | /* |
1942 | * Without erase_group_def set, MMC erase timeout depends on clock | |
1943 | * frequence which can change. In that case, the best choice is | |
1944 | * just the preferred erase size. | |
1945 | */ | |
1946 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
1947 | return card->pref_erase; | |
1948 | ||
1949 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
d4721339 | 1950 | if (mmc_can_trim(card)) { |
e056a1b5 | 1951 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); |
d4721339 | 1952 | if (max_trim < max_discard || max_discard == 0) |
e056a1b5 AH |
1953 | max_discard = max_trim; |
1954 | } else if (max_discard < card->erase_size) { | |
1955 | max_discard = 0; | |
1956 | } | |
1957 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
12182aff UH |
1958 | mmc_hostname(host), max_discard, host->max_busy_timeout ? |
1959 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); | |
e056a1b5 AH |
1960 | return max_discard; |
1961 | } | |
1962 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
1963 | ||
33e6d74d UH |
1964 | bool mmc_card_is_blockaddr(struct mmc_card *card) |
1965 | { | |
1966 | return card ? mmc_card_blockaddr(card) : false; | |
1967 | } | |
1968 | EXPORT_SYMBOL(mmc_card_is_blockaddr); | |
1969 | ||
0f8d8ea6 AH |
1970 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
1971 | { | |
c7836d15 | 1972 | struct mmc_command cmd = {}; |
0f8d8ea6 | 1973 | |
1712c937 ZX |
1974 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || |
1975 | mmc_card_hs400(card) || mmc_card_hs400es(card)) | |
0f8d8ea6 AH |
1976 | return 0; |
1977 | ||
0f8d8ea6 AH |
1978 | cmd.opcode = MMC_SET_BLOCKLEN; |
1979 | cmd.arg = blocklen; | |
1980 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1981 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
1982 | } | |
1983 | EXPORT_SYMBOL(mmc_set_blocklen); | |
1984 | ||
b2499518 AH |
1985 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
1986 | { | |
52c8212d UH |
1987 | mmc_pwrseq_reset(host); |
1988 | ||
b2499518 AH |
1989 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
1990 | return; | |
b2499518 | 1991 | host->ops->hw_reset(host); |
b2499518 AH |
1992 | } |
1993 | ||
3439c588 WS |
1994 | /** |
1995 | * mmc_hw_reset - reset the card in hardware | |
1996 | * @host: MMC host to which the card is attached | |
1997 | * | |
1998 | * Hard reset the card. This function is only for upper layers, like the | |
1999 | * block layer or card drivers. You cannot use it in host drivers (struct | |
2000 | * mmc_card might be gone then). | |
2001 | * | |
2002 | * Return: 0 on success, -errno on failure | |
2003 | */ | |
83533ab2 | 2004 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2005 | { |
f855a371 | 2006 | int ret; |
b2499518 | 2007 | |
3a3db603 | 2008 | ret = host->bus_ops->hw_reset(host); |
2ac55d5e | 2009 | if (ret < 0) |
3a3db603 | 2010 | pr_warn("%s: tried to HW reset card, got error %d\n", |
4e6c7178 | 2011 | mmc_hostname(host), ret); |
b2499518 | 2012 | |
f855a371 | 2013 | return ret; |
b2499518 | 2014 | } |
b2499518 AH |
2015 | EXPORT_SYMBOL(mmc_hw_reset); |
2016 | ||
1433269c UH |
2017 | int mmc_sw_reset(struct mmc_host *host) |
2018 | { | |
2019 | int ret; | |
2020 | ||
fefdd3c9 | 2021 | if (!host->bus_ops->sw_reset) |
1433269c | 2022 | return -EOPNOTSUPP; |
1433269c UH |
2023 | |
2024 | ret = host->bus_ops->sw_reset(host); | |
1433269c UH |
2025 | if (ret) |
2026 | pr_warn("%s: tried to SW reset card, got error %d\n", | |
2027 | mmc_hostname(host), ret); | |
2028 | ||
2029 | return ret; | |
2030 | } | |
2031 | EXPORT_SYMBOL(mmc_sw_reset); | |
2032 | ||
807e8e40 AR |
2033 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2034 | { | |
2035 | host->f_init = freq; | |
2036 | ||
69f25f9b | 2037 | pr_debug("%s: %s: trying to init card at %u Hz\n", |
807e8e40 | 2038 | mmc_hostname(host), __func__, host->f_init); |
69f25f9b | 2039 | |
4a065193 | 2040 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2041 | |
b2499518 AH |
2042 | /* |
2043 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2044 | * do a hardware reset if possible. | |
2045 | */ | |
2046 | mmc_hw_reset_for_init(host); | |
2047 | ||
2f94e55a PR |
2048 | /* |
2049 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2050 | * if the card is being re-initialized, just send it. CMD52 | |
2051 | * should be ignored by SD/eMMC cards. | |
100a606d | 2052 | * Skip it if we already know that we do not support SDIO commands |
2f94e55a | 2053 | */ |
100a606d CC |
2054 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2055 | sdio_reset(host); | |
2056 | ||
807e8e40 AR |
2057 | mmc_go_idle(host); |
2058 | ||
ead49373 UH |
2059 | if (!(host->caps2 & MMC_CAP2_NO_SD)) { |
2060 | if (mmc_send_if_cond_pcie(host, host->ocr_avail)) | |
2061 | goto out; | |
2062 | if (mmc_card_sd_express(host)) | |
2063 | return 0; | |
2064 | } | |
807e8e40 AR |
2065 | |
2066 | /* Order's important: probe SDIO, then SD, then MMC */ | |
100a606d CC |
2067 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2068 | if (!mmc_attach_sdio(host)) | |
2069 | return 0; | |
2070 | ||
1b8d79c5 UH |
2071 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2072 | if (!mmc_attach_sd(host)) | |
2073 | return 0; | |
2074 | ||
a0c3b68c SL |
2075 | if (!(host->caps2 & MMC_CAP2_NO_MMC)) |
2076 | if (!mmc_attach_mmc(host)) | |
2077 | return 0; | |
807e8e40 | 2078 | |
ead49373 | 2079 | out: |
807e8e40 AR |
2080 | mmc_power_off(host); |
2081 | return -EIO; | |
2082 | } | |
2083 | ||
d3049504 AH |
2084 | int _mmc_detect_card_removed(struct mmc_host *host) |
2085 | { | |
2086 | int ret; | |
2087 | ||
d3049504 AH |
2088 | if (!host->card || mmc_card_removed(host->card)) |
2089 | return 1; | |
2090 | ||
2091 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2092 | |
2093 | /* | |
2094 | * Card detect status and alive check may be out of sync if card is | |
2095 | * removed slowly, when card detect switch changes while card/slot | |
2096 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2097 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2098 | * detect work 200ms later for this case. | |
2099 | */ | |
2100 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2101 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2102 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2103 | } | |
2104 | ||
d3049504 AH |
2105 | if (ret) { |
2106 | mmc_card_set_removed(host->card); | |
2107 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2108 | } | |
2109 | ||
2110 | return ret; | |
2111 | } | |
2112 | ||
2113 | int mmc_detect_card_removed(struct mmc_host *host) | |
2114 | { | |
2115 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2116 | int ret; |
d3049504 AH |
2117 | |
2118 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2119 | |
2120 | if (!card) | |
2121 | return 1; | |
2122 | ||
6067bafe | 2123 | if (!mmc_card_is_removable(host)) |
1ff2575b UH |
2124 | return 0; |
2125 | ||
f0cc9cf9 | 2126 | ret = mmc_card_removed(card); |
d3049504 AH |
2127 | /* |
2128 | * The card will be considered unchanged unless we have been asked to | |
2129 | * detect a change or host requires polling to provide card detection. | |
2130 | */ | |
b6891679 | 2131 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2132 | return ret; |
d3049504 AH |
2133 | |
2134 | host->detect_change = 0; | |
f0cc9cf9 UH |
2135 | if (!ret) { |
2136 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2137 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2138 | /* |
2139 | * Schedule a detect work as soon as possible to let a | |
2140 | * rescan handle the card removal. | |
2141 | */ | |
2142 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2143 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2144 | } |
2145 | } | |
d3049504 | 2146 | |
f0cc9cf9 | 2147 | return ret; |
d3049504 AH |
2148 | } |
2149 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2150 | ||
b93931a6 | 2151 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2152 | { |
c4028958 DH |
2153 | struct mmc_host *host = |
2154 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2155 | int i; |
4c2ef25f | 2156 | |
807e8e40 | 2157 | if (host->rescan_disable) |
4c2ef25f | 2158 | return; |
1da177e4 | 2159 | |
3339d1e3 | 2160 | /* If there is a non-removable card registered, only scan once */ |
6067bafe | 2161 | if (!mmc_card_is_removable(host) && host->rescan_entered) |
3339d1e3 JR |
2162 | return; |
2163 | host->rescan_entered = 1; | |
2164 | ||
86236813 | 2165 | if (host->trigger_card_event && host->ops->card_event) { |
d234d212 | 2166 | mmc_claim_host(host); |
86236813 | 2167 | host->ops->card_event(host); |
d234d212 | 2168 | mmc_release_host(host); |
86236813 UH |
2169 | host->trigger_card_event = false; |
2170 | } | |
2171 | ||
99b4ddd8 | 2172 | /* Verify a registered card to be functional, else remove it. */ |
e9ce2ce1 | 2173 | if (host->bus_ops) |
94d89efb JS |
2174 | host->bus_ops->detect(host); |
2175 | ||
d3049504 AH |
2176 | host->detect_change = 0; |
2177 | ||
94d89efb | 2178 | /* if there still is a card present, stop here */ |
e9ce2ce1 | 2179 | if (host->bus_ops != NULL) |
94d89efb | 2180 | goto out; |
1da177e4 | 2181 | |
d234d212 | 2182 | mmc_claim_host(host); |
6067bafe | 2183 | if (mmc_card_is_removable(host) && host->ops->get_cd && |
c1b55bfc | 2184 | host->ops->get_cd(host) == 0) { |
fa550189 UH |
2185 | mmc_power_off(host); |
2186 | mmc_release_host(host); | |
94d89efb | 2187 | goto out; |
fa550189 | 2188 | } |
1da177e4 | 2189 | |
ead49373 UH |
2190 | /* If an SD express card is present, then leave it as is. */ |
2191 | if (mmc_card_sd_express(host)) { | |
2192 | mmc_release_host(host); | |
2193 | goto out; | |
2194 | } | |
2195 | ||
88ae8b86 | 2196 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
661cf2d8 MM |
2197 | unsigned int freq = freqs[i]; |
2198 | if (freq > host->f_max) { | |
2199 | if (i + 1 < ARRAY_SIZE(freqs)) | |
2200 | continue; | |
2201 | freq = host->f_max; | |
2202 | } | |
2203 | if (!mmc_rescan_try_freq(host, max(freq, host->f_min))) | |
807e8e40 | 2204 | break; |
06b2233a | 2205 | if (freqs[i] <= host->f_min) |
807e8e40 | 2206 | break; |
88ae8b86 | 2207 | } |
807e8e40 AR |
2208 | mmc_release_host(host); |
2209 | ||
2210 | out: | |
28f52482 AV |
2211 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2212 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2213 | } |
2214 | ||
b93931a6 | 2215 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2216 | { |
661cf2d8 | 2217 | host->f_init = max(min(freqs[0], host->f_max), host->f_min); |
d9adcc12 | 2218 | host->rescan_disable = 0; |
8d1ffc8c | 2219 | |
c2c24819 UH |
2220 | if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) { |
2221 | mmc_claim_host(host); | |
4a065193 | 2222 | mmc_power_up(host, host->ocr_avail); |
c2c24819 UH |
2223 | mmc_release_host(host); |
2224 | } | |
8d1ffc8c | 2225 | |
740a221e | 2226 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2227 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2228 | } |
2229 | ||
b93931a6 | 2230 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2231 | { |
03dbaa04 | 2232 | if (host->slot.cd_irq >= 0) { |
36f1d7e8 | 2233 | mmc_gpio_set_cd_wake(host, false); |
740a221e | 2234 | disable_irq(host->slot.cd_irq); |
03dbaa04 | 2235 | } |
3b91e550 | 2236 | |
d9adcc12 | 2237 | host->rescan_disable = 1; |
d9bcbf34 | 2238 | cancel_delayed_work_sync(&host->detect); |
3b91e550 | 2239 | |
da68c4eb NP |
2240 | /* clear pm flags now and let card drivers set them as needed */ |
2241 | host->pm_flags = 0; | |
2242 | ||
e9ce2ce1 | 2243 | if (host->bus_ops) { |
0db13fc2 | 2244 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2245 | host->bus_ops->remove(host); |
7ea239d9 PO |
2246 | mmc_claim_host(host); |
2247 | mmc_detach_bus(host); | |
7f7e4129 | 2248 | mmc_power_off(host); |
7ea239d9 | 2249 | mmc_release_host(host); |
53509f0f | 2250 | return; |
1da177e4 | 2251 | } |
7ea239d9 | 2252 | |
8d1ffc8c | 2253 | mmc_claim_host(host); |
1da177e4 | 2254 | mmc_power_off(host); |
8d1ffc8c | 2255 | mmc_release_host(host); |
1da177e4 LT |
2256 | } |
2257 | ||
ffce2e7e PO |
2258 | static int __init mmc_init(void) |
2259 | { | |
2260 | int ret; | |
2261 | ||
ffce2e7e | 2262 | ret = mmc_register_bus(); |
e29a7d73 | 2263 | if (ret) |
520bd7a8 | 2264 | return ret; |
e29a7d73 PO |
2265 | |
2266 | ret = mmc_register_host_class(); | |
2267 | if (ret) | |
2268 | goto unregister_bus; | |
2269 | ||
2270 | ret = sdio_register_bus(); | |
2271 | if (ret) | |
2272 | goto unregister_host_class; | |
2273 | ||
2274 | return 0; | |
2275 | ||
2276 | unregister_host_class: | |
2277 | mmc_unregister_host_class(); | |
2278 | unregister_bus: | |
2279 | mmc_unregister_bus(); | |
ffce2e7e PO |
2280 | return ret; |
2281 | } | |
2282 | ||
2283 | static void __exit mmc_exit(void) | |
2284 | { | |
e29a7d73 | 2285 | sdio_unregister_bus(); |
ffce2e7e PO |
2286 | mmc_unregister_host_class(); |
2287 | mmc_unregister_bus(); | |
ffce2e7e PO |
2288 | } |
2289 | ||
26074962 | 2290 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2291 | module_exit(mmc_exit); |
2292 | ||
1da177e4 | 2293 | MODULE_LICENSE("GPL"); |