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" |
ffce2e7e PO |
40 | #include "bus.h" |
41 | #include "host.h" | |
e29a7d73 | 42 | #include "sdio_bus.h" |
3aa8793f | 43 | #include "pwrseq.h" |
da7fbe58 PO |
44 | |
45 | #include "mmc_ops.h" | |
46 | #include "sd_ops.h" | |
5c4e6f13 | 47 | #include "sdio_ops.h" |
1da177e4 | 48 | |
12182aff UH |
49 | /* The max erase timeout, used when host->max_busy_timeout isn't specified */ |
50 | #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ | |
ad9be7ff | 51 | #define SD_DISCARD_TIMEOUT_MS (250) |
12182aff | 52 | |
fa550189 | 53 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 54 | |
af517150 DB |
55 | /* |
56 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
57 | * performance cost, and for other reasons may not always be desired. | |
58 | * So we allow it it to be disabled. | |
59 | */ | |
90ab5ee9 | 60 | bool use_spi_crc = 1; |
af517150 DB |
61 | module_param(use_spi_crc, bool, 0); |
62 | ||
ffce2e7e PO |
63 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
64 | unsigned long delay) | |
65 | { | |
520bd7a8 UH |
66 | /* |
67 | * We use the system_freezable_wq, because of two reasons. | |
68 | * First, it allows several works (not the same work item) to be | |
69 | * executed simultaneously. Second, the queue becomes frozen when | |
70 | * userspace becomes frozen during system PM. | |
71 | */ | |
72 | return queue_delayed_work(system_freezable_wq, work, delay); | |
ffce2e7e PO |
73 | } |
74 | ||
1b676f70 PF |
75 | #ifdef CONFIG_FAIL_MMC_REQUEST |
76 | ||
77 | /* | |
78 | * Internal function. Inject random data errors. | |
79 | * If mmc_data is NULL no errors are injected. | |
80 | */ | |
81 | static void mmc_should_fail_request(struct mmc_host *host, | |
82 | struct mmc_request *mrq) | |
83 | { | |
84 | struct mmc_command *cmd = mrq->cmd; | |
85 | struct mmc_data *data = mrq->data; | |
86 | static const int data_errors[] = { | |
87 | -ETIMEDOUT, | |
88 | -EILSEQ, | |
89 | -EIO, | |
90 | }; | |
91 | ||
92 | if (!data) | |
93 | return; | |
94 | ||
e5723f95 | 95 | if ((cmd && cmd->error) || data->error || |
1b676f70 PF |
96 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) |
97 | return; | |
98 | ||
2e744fcb AM |
99 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
100 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
101 | } |
102 | ||
103 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
104 | ||
105 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
106 | struct mmc_request *mrq) | |
107 | { | |
108 | } | |
109 | ||
110 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
111 | ||
5163af5a AH |
112 | static inline void mmc_complete_cmd(struct mmc_request *mrq) |
113 | { | |
114 | if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) | |
115 | complete_all(&mrq->cmd_completion); | |
116 | } | |
117 | ||
118 | void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) | |
119 | { | |
120 | if (!mrq->cap_cmd_during_tfr) | |
121 | return; | |
122 | ||
123 | mmc_complete_cmd(mrq); | |
124 | ||
125 | pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", | |
126 | mmc_hostname(host), mrq->cmd->opcode); | |
127 | } | |
128 | EXPORT_SYMBOL(mmc_command_done); | |
129 | ||
1da177e4 | 130 | /** |
fe10c6ab RK |
131 | * mmc_request_done - finish processing an MMC request |
132 | * @host: MMC host which completed request | |
133 | * @mrq: MMC request which request | |
1da177e4 LT |
134 | * |
135 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 136 | * their processing of a request. |
1da177e4 LT |
137 | */ |
138 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
139 | { | |
140 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
141 | int err = cmd->error; |
142 | ||
bd11e8bd | 143 | /* Flag re-tuning needed on CRC errors */ |
0a55f4ab DA |
144 | if (cmd->opcode != MMC_SEND_TUNING_BLOCK && |
145 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && | |
146 | !host->retune_crc_disable && | |
031277d4 | 147 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || |
bd11e8bd | 148 | (mrq->data && mrq->data->error == -EILSEQ) || |
031277d4 | 149 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
bd11e8bd AH |
150 | mmc_retune_needed(host); |
151 | ||
af517150 DB |
152 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
153 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
154 | cmd->retries = 0; | |
155 | } | |
156 | ||
5163af5a AH |
157 | if (host->ongoing_mrq == mrq) |
158 | host->ongoing_mrq = NULL; | |
159 | ||
160 | mmc_complete_cmd(mrq); | |
161 | ||
7962fc37 BW |
162 | trace_mmc_request_done(host, mrq); |
163 | ||
67b8360a LW |
164 | /* |
165 | * We list various conditions for the command to be considered | |
166 | * properly done: | |
167 | * | |
168 | * - There was no error, OK fine then | |
169 | * - We are not doing some kind of retry | |
170 | * - The card was removed (...so just complete everything no matter | |
171 | * if there are errors or retries) | |
172 | */ | |
173 | if (!err || !cmd->retries || mmc_card_removed(host->card)) { | |
1b676f70 PF |
174 | mmc_should_fail_request(host, mrq); |
175 | ||
5163af5a AH |
176 | if (!host->ongoing_mrq) |
177 | led_trigger_event(host->led, LED_OFF); | |
af8350c7 | 178 | |
fc75b708 AG |
179 | if (mrq->sbc) { |
180 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
181 | mmc_hostname(host), mrq->sbc->opcode, | |
182 | mrq->sbc->error, | |
183 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
184 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
185 | } | |
186 | ||
e4d21708 PO |
187 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
188 | mmc_hostname(host), cmd->opcode, err, | |
189 | cmd->resp[0], cmd->resp[1], | |
190 | cmd->resp[2], cmd->resp[3]); | |
191 | ||
192 | if (mrq->data) { | |
193 | pr_debug("%s: %d bytes transferred: %d\n", | |
194 | mmc_hostname(host), | |
195 | mrq->data->bytes_xfered, mrq->data->error); | |
196 | } | |
197 | ||
198 | if (mrq->stop) { | |
199 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
200 | mmc_hostname(host), mrq->stop->opcode, | |
201 | mrq->stop->error, | |
202 | mrq->stop->resp[0], mrq->stop->resp[1], | |
203 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
204 | } | |
1da177e4 | 205 | } |
67b8360a LW |
206 | /* |
207 | * Request starter must handle retries - see | |
208 | * mmc_wait_for_req_done(). | |
209 | */ | |
210 | if (mrq->done) | |
211 | mrq->done(mrq); | |
1da177e4 LT |
212 | } |
213 | ||
214 | EXPORT_SYMBOL(mmc_request_done); | |
215 | ||
90a81489 AH |
216 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
217 | { | |
218 | int err; | |
219 | ||
220 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
221 | err = mmc_retune(host); | |
222 | if (err) { | |
223 | mrq->cmd->error = err; | |
224 | mmc_request_done(host, mrq); | |
225 | return; | |
226 | } | |
227 | ||
5d3f6ef0 HG |
228 | /* |
229 | * For sdio rw commands we must wait for card busy otherwise some | |
230 | * sdio devices won't work properly. | |
f328c76e | 231 | * And bypass I/O abort, reset and bus suspend operations. |
5d3f6ef0 | 232 | */ |
f328c76e | 233 | if (sdio_is_io_busy(mrq->cmd->opcode, mrq->cmd->arg) && |
234 | host->ops->card_busy) { | |
5d3f6ef0 HG |
235 | int tries = 500; /* Wait aprox 500ms at maximum */ |
236 | ||
237 | while (host->ops->card_busy(host) && --tries) | |
238 | mmc_delay(1); | |
239 | ||
240 | if (tries == 0) { | |
241 | mrq->cmd->error = -EBUSY; | |
242 | mmc_request_done(host, mrq); | |
243 | return; | |
244 | } | |
245 | } | |
246 | ||
5163af5a AH |
247 | if (mrq->cap_cmd_during_tfr) { |
248 | host->ongoing_mrq = mrq; | |
249 | /* | |
250 | * Retry path could come through here without having waiting on | |
251 | * cmd_completion, so ensure it is reinitialised. | |
252 | */ | |
253 | reinit_completion(&mrq->cmd_completion); | |
254 | } | |
255 | ||
7962fc37 BW |
256 | trace_mmc_request_start(host, mrq); |
257 | ||
3e207c8c AH |
258 | if (host->cqe_on) |
259 | host->cqe_ops->cqe_off(host); | |
260 | ||
90a81489 AH |
261 | host->ops->request(host, mrq); |
262 | } | |
263 | ||
72a5af55 AH |
264 | static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq, |
265 | bool cqe) | |
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 | 273 | if (mrq->cmd) { |
72a5af55 AH |
274 | pr_debug("%s: starting %sCMD%u arg %08x flags %08x\n", |
275 | mmc_hostname(host), cqe ? "CQE direct " : "", | |
276 | mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags); | |
277 | } else if (cqe) { | |
278 | pr_debug("%s: starting CQE transfer for tag %d blkaddr %u\n", | |
279 | mmc_hostname(host), mrq->tag, mrq->data->blk_addr); | |
4b67e63f | 280 | } |
1da177e4 | 281 | |
e4d21708 PO |
282 | if (mrq->data) { |
283 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
284 | "tsac %d ms nsac %d\n", | |
285 | mmc_hostname(host), mrq->data->blksz, | |
286 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 287 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
288 | mrq->data->timeout_clks); |
289 | } | |
290 | ||
291 | if (mrq->stop) { | |
292 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
293 | mmc_hostname(host), mrq->stop->opcode, | |
294 | mrq->stop->arg, mrq->stop->flags); | |
295 | } | |
4b67e63f AH |
296 | } |
297 | ||
f34bdd2f | 298 | static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq) |
4b67e63f | 299 | { |
b044b1bc | 300 | unsigned int i, sz = 0; |
4b67e63f | 301 | struct scatterlist *sg; |
1da177e4 | 302 | |
f34bdd2f AH |
303 | if (mrq->cmd) { |
304 | mrq->cmd->error = 0; | |
305 | mrq->cmd->mrq = mrq; | |
306 | mrq->cmd->data = mrq->data; | |
307 | } | |
cce411e6 AG |
308 | if (mrq->sbc) { |
309 | mrq->sbc->error = 0; | |
310 | mrq->sbc->mrq = mrq; | |
311 | } | |
1da177e4 | 312 | if (mrq->data) { |
6ff897ff SL |
313 | if (mrq->data->blksz > host->max_blk_size || |
314 | mrq->data->blocks > host->max_blk_count || | |
315 | mrq->data->blocks * mrq->data->blksz > host->max_req_size) | |
316 | return -EINVAL; | |
b044b1bc | 317 | |
a84756c5 PO |
318 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
319 | sz += sg->length; | |
6ff897ff SL |
320 | if (sz != mrq->data->blocks * mrq->data->blksz) |
321 | return -EINVAL; | |
b044b1bc | 322 | |
1da177e4 LT |
323 | mrq->data->error = 0; |
324 | mrq->data->mrq = mrq; | |
325 | if (mrq->stop) { | |
326 | mrq->data->stop = mrq->stop; | |
327 | mrq->stop->error = 0; | |
328 | mrq->stop->mrq = mrq; | |
329 | } | |
330 | } | |
f34bdd2f AH |
331 | |
332 | return 0; | |
333 | } | |
334 | ||
cb39f61e | 335 | int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
f34bdd2f AH |
336 | { |
337 | int err; | |
338 | ||
d2383318 AH |
339 | init_completion(&mrq->cmd_completion); |
340 | ||
f34bdd2f AH |
341 | mmc_retune_hold(host); |
342 | ||
343 | if (mmc_card_removed(host->card)) | |
344 | return -ENOMEDIUM; | |
345 | ||
72a5af55 | 346 | mmc_mrq_pr_debug(host, mrq, false); |
f34bdd2f AH |
347 | |
348 | WARN_ON(!host->claimed); | |
349 | ||
350 | err = mmc_mrq_prep(host, mrq); | |
351 | if (err) | |
352 | return err; | |
353 | ||
66c036e0 | 354 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 355 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
356 | |
357 | return 0; | |
1da177e4 | 358 | } |
cb39f61e | 359 | EXPORT_SYMBOL(mmc_start_request); |
1da177e4 | 360 | |
1da177e4 LT |
361 | static void mmc_wait_done(struct mmc_request *mrq) |
362 | { | |
aa8b683a PF |
363 | complete(&mrq->completion); |
364 | } | |
365 | ||
5163af5a AH |
366 | static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) |
367 | { | |
368 | struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); | |
369 | ||
370 | /* | |
371 | * If there is an ongoing transfer, wait for the command line to become | |
372 | * available. | |
373 | */ | |
374 | if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) | |
375 | wait_for_completion(&ongoing_mrq->cmd_completion); | |
376 | } | |
377 | ||
956d9fd5 | 378 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 379 | { |
f100c1c2 AH |
380 | int err; |
381 | ||
5163af5a AH |
382 | mmc_wait_ongoing_tfr_cmd(host); |
383 | ||
aa8b683a PF |
384 | init_completion(&mrq->completion); |
385 | mrq->done = mmc_wait_done; | |
f100c1c2 AH |
386 | |
387 | err = mmc_start_request(host, mrq); | |
388 | if (err) { | |
389 | mrq->cmd->error = err; | |
5163af5a | 390 | mmc_complete_cmd(mrq); |
d3049504 | 391 | complete(&mrq->completion); |
d3049504 | 392 | } |
f100c1c2 AH |
393 | |
394 | return err; | |
aa8b683a PF |
395 | } |
396 | ||
5163af5a | 397 | void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 398 | { |
08a7e1df AH |
399 | struct mmc_command *cmd; |
400 | ||
401 | while (1) { | |
402 | wait_for_completion(&mrq->completion); | |
403 | ||
404 | cmd = mrq->cmd; | |
775a9362 | 405 | |
d3049504 AH |
406 | if (!cmd->error || !cmd->retries || |
407 | mmc_card_removed(host->card)) | |
08a7e1df AH |
408 | break; |
409 | ||
90a81489 AH |
410 | mmc_retune_recheck(host); |
411 | ||
08a7e1df AH |
412 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
413 | mmc_hostname(host), cmd->opcode, cmd->error); | |
414 | cmd->retries--; | |
415 | cmd->error = 0; | |
90a81489 | 416 | __mmc_start_request(host, mrq); |
08a7e1df | 417 | } |
90a81489 AH |
418 | |
419 | mmc_retune_release(host); | |
aa8b683a | 420 | } |
5163af5a AH |
421 | EXPORT_SYMBOL(mmc_wait_for_req_done); |
422 | ||
72a5af55 AH |
423 | /* |
424 | * mmc_cqe_start_req - Start a CQE request. | |
425 | * @host: MMC host to start the request | |
426 | * @mrq: request to start | |
427 | * | |
428 | * Start the request, re-tuning if needed and it is possible. Returns an error | |
429 | * code if the request fails to start or -EBUSY if CQE is busy. | |
430 | */ | |
431 | int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) | |
432 | { | |
433 | int err; | |
434 | ||
435 | /* | |
436 | * CQE cannot process re-tuning commands. Caller must hold retuning | |
437 | * while CQE is in use. Re-tuning can happen here only when CQE has no | |
438 | * active requests i.e. this is the first. Note, re-tuning will call | |
439 | * ->cqe_off(). | |
440 | */ | |
441 | err = mmc_retune(host); | |
442 | if (err) | |
443 | goto out_err; | |
444 | ||
445 | mrq->host = host; | |
446 | ||
447 | mmc_mrq_pr_debug(host, mrq, true); | |
448 | ||
449 | err = mmc_mrq_prep(host, mrq); | |
450 | if (err) | |
451 | goto out_err; | |
452 | ||
453 | err = host->cqe_ops->cqe_request(host, mrq); | |
454 | if (err) | |
455 | goto out_err; | |
456 | ||
457 | trace_mmc_request_start(host, mrq); | |
458 | ||
459 | return 0; | |
460 | ||
461 | out_err: | |
462 | if (mrq->cmd) { | |
463 | pr_debug("%s: failed to start CQE direct CMD%u, error %d\n", | |
464 | mmc_hostname(host), mrq->cmd->opcode, err); | |
465 | } else { | |
466 | pr_debug("%s: failed to start CQE transfer for tag %d, error %d\n", | |
467 | mmc_hostname(host), mrq->tag, err); | |
468 | } | |
469 | return err; | |
470 | } | |
471 | EXPORT_SYMBOL(mmc_cqe_start_req); | |
472 | ||
473 | /** | |
474 | * mmc_cqe_request_done - CQE has finished processing an MMC request | |
475 | * @host: MMC host which completed request | |
476 | * @mrq: MMC request which completed | |
477 | * | |
478 | * CQE drivers should call this function when they have completed | |
479 | * their processing of a request. | |
480 | */ | |
481 | void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
482 | { | |
483 | mmc_should_fail_request(host, mrq); | |
484 | ||
485 | /* Flag re-tuning needed on CRC errors */ | |
486 | if ((mrq->cmd && mrq->cmd->error == -EILSEQ) || | |
487 | (mrq->data && mrq->data->error == -EILSEQ)) | |
488 | mmc_retune_needed(host); | |
489 | ||
490 | trace_mmc_request_done(host, mrq); | |
491 | ||
492 | if (mrq->cmd) { | |
493 | pr_debug("%s: CQE req done (direct CMD%u): %d\n", | |
494 | mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->error); | |
495 | } else { | |
496 | pr_debug("%s: CQE transfer done tag %d\n", | |
497 | mmc_hostname(host), mrq->tag); | |
498 | } | |
499 | ||
500 | if (mrq->data) { | |
501 | pr_debug("%s: %d bytes transferred: %d\n", | |
502 | mmc_hostname(host), | |
503 | mrq->data->bytes_xfered, mrq->data->error); | |
504 | } | |
505 | ||
506 | mrq->done(mrq); | |
507 | } | |
508 | EXPORT_SYMBOL(mmc_cqe_request_done); | |
509 | ||
510 | /** | |
511 | * mmc_cqe_post_req - CQE post process of a completed MMC request | |
512 | * @host: MMC host | |
513 | * @mrq: MMC request to be processed | |
514 | */ | |
515 | void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq) | |
516 | { | |
517 | if (host->cqe_ops->cqe_post_req) | |
518 | host->cqe_ops->cqe_post_req(host, mrq); | |
519 | } | |
520 | EXPORT_SYMBOL(mmc_cqe_post_req); | |
521 | ||
522 | /* Arbitrary 1 second timeout */ | |
523 | #define MMC_CQE_RECOVERY_TIMEOUT 1000 | |
524 | ||
525 | /* | |
526 | * mmc_cqe_recovery - Recover from CQE errors. | |
527 | * @host: MMC host to recover | |
528 | * | |
529 | * Recovery consists of stopping CQE, stopping eMMC, discarding the queue in | |
530 | * in eMMC, and discarding the queue in CQE. CQE must call | |
531 | * mmc_cqe_request_done() on all requests. An error is returned if the eMMC | |
532 | * fails to discard its queue. | |
533 | */ | |
534 | int mmc_cqe_recovery(struct mmc_host *host) | |
535 | { | |
536 | struct mmc_command cmd; | |
537 | int err; | |
538 | ||
539 | mmc_retune_hold_now(host); | |
540 | ||
541 | /* | |
542 | * Recovery is expected seldom, if at all, but it reduces performance, | |
543 | * so make sure it is not completely silent. | |
544 | */ | |
545 | pr_warn("%s: running CQE recovery\n", mmc_hostname(host)); | |
546 | ||
547 | host->cqe_ops->cqe_recovery_start(host); | |
548 | ||
549 | memset(&cmd, 0, sizeof(cmd)); | |
550 | cmd.opcode = MMC_STOP_TRANSMISSION, | |
551 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC, | |
552 | cmd.flags &= ~MMC_RSP_CRC; /* Ignore CRC */ | |
553 | cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT, | |
554 | mmc_wait_for_cmd(host, &cmd, 0); | |
555 | ||
556 | memset(&cmd, 0, sizeof(cmd)); | |
557 | cmd.opcode = MMC_CMDQ_TASK_MGMT; | |
558 | cmd.arg = 1; /* Discard entire queue */ | |
559 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; | |
560 | cmd.flags &= ~MMC_RSP_CRC; /* Ignore CRC */ | |
561 | cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT, | |
562 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
563 | ||
564 | host->cqe_ops->cqe_recovery_finish(host); | |
565 | ||
566 | mmc_retune_release(host); | |
567 | ||
568 | return err; | |
569 | } | |
570 | EXPORT_SYMBOL(mmc_cqe_recovery); | |
571 | ||
5163af5a AH |
572 | /** |
573 | * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done | |
574 | * @host: MMC host | |
575 | * @mrq: MMC request | |
576 | * | |
577 | * mmc_is_req_done() is used with requests that have | |
578 | * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after | |
579 | * starting a request and before waiting for it to complete. That is, | |
580 | * either in between calls to mmc_start_req(), or after mmc_wait_for_req() | |
581 | * and before mmc_wait_for_req_done(). If it is called at other times the | |
582 | * result is not meaningful. | |
583 | */ | |
584 | bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) | |
585 | { | |
126b6270 | 586 | return completion_done(&mrq->completion); |
5163af5a AH |
587 | } |
588 | EXPORT_SYMBOL(mmc_is_req_done); | |
aa8b683a | 589 | |
67a61c48 PO |
590 | /** |
591 | * mmc_wait_for_req - start a request and wait for completion | |
592 | * @host: MMC host to start command | |
593 | * @mrq: MMC request to start | |
594 | * | |
595 | * Start a new MMC custom command request for a host, and wait | |
5163af5a AH |
596 | * for the command to complete. In the case of 'cap_cmd_during_tfr' |
597 | * requests, the transfer is ongoing and the caller can issue further | |
598 | * commands that do not use the data lines, and then wait by calling | |
599 | * mmc_wait_for_req_done(). | |
600 | * Does not attempt to parse the response. | |
67a61c48 PO |
601 | */ |
602 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 603 | { |
aa8b683a | 604 | __mmc_start_req(host, mrq); |
5163af5a AH |
605 | |
606 | if (!mrq->cap_cmd_during_tfr) | |
607 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 608 | } |
1da177e4 LT |
609 | EXPORT_SYMBOL(mmc_wait_for_req); |
610 | ||
611 | /** | |
612 | * mmc_wait_for_cmd - start a command and wait for completion | |
613 | * @host: MMC host to start command | |
614 | * @cmd: MMC command to start | |
615 | * @retries: maximum number of retries | |
616 | * | |
617 | * Start a new MMC command for a host, and wait for the command | |
618 | * to complete. Return any error that occurred while the command | |
619 | * was executing. Do not attempt to parse the response. | |
620 | */ | |
621 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
622 | { | |
c7836d15 | 623 | struct mmc_request mrq = {}; |
1da177e4 | 624 | |
d84075c8 | 625 | WARN_ON(!host->claimed); |
1da177e4 | 626 | |
1da177e4 LT |
627 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
628 | cmd->retries = retries; | |
629 | ||
630 | mrq.cmd = cmd; | |
631 | cmd->data = NULL; | |
632 | ||
633 | mmc_wait_for_req(host, &mrq); | |
634 | ||
635 | return cmd->error; | |
636 | } | |
637 | ||
638 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
639 | ||
d773d725 RK |
640 | /** |
641 | * mmc_set_data_timeout - set the timeout for a data command | |
642 | * @data: data phase for command | |
643 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
644 | * |
645 | * Computes the data timeout parameters according to the | |
646 | * correct algorithm given the card type. | |
d773d725 | 647 | */ |
b146d26a | 648 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
649 | { |
650 | unsigned int mult; | |
651 | ||
e6f918bf PO |
652 | /* |
653 | * SDIO cards only define an upper 1 s limit on access. | |
654 | */ | |
655 | if (mmc_card_sdio(card)) { | |
656 | data->timeout_ns = 1000000000; | |
657 | data->timeout_clks = 0; | |
658 | return; | |
659 | } | |
660 | ||
d773d725 RK |
661 | /* |
662 | * SD cards use a 100 multiplier rather than 10 | |
663 | */ | |
664 | mult = mmc_card_sd(card) ? 100 : 10; | |
665 | ||
666 | /* | |
667 | * Scale up the multiplier (and therefore the timeout) by | |
668 | * the r2w factor for writes. | |
669 | */ | |
b146d26a | 670 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
671 | mult <<= card->csd.r2w_factor; |
672 | ||
4406ae21 SL |
673 | data->timeout_ns = card->csd.taac_ns * mult; |
674 | data->timeout_clks = card->csd.taac_clks * mult; | |
d773d725 RK |
675 | |
676 | /* | |
677 | * SD cards also have an upper limit on the timeout. | |
678 | */ | |
679 | if (mmc_card_sd(card)) { | |
680 | unsigned int timeout_us, limit_us; | |
681 | ||
682 | timeout_us = data->timeout_ns / 1000; | |
9eadcc05 | 683 | if (card->host->ios.clock) |
e9b86841 | 684 | timeout_us += data->timeout_clks * 1000 / |
9eadcc05 | 685 | (card->host->ios.clock / 1000); |
d773d725 | 686 | |
b146d26a | 687 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 688 | /* |
3bdc9ba8 PW |
689 | * The MMC spec "It is strongly recommended |
690 | * for hosts to implement more than 500ms | |
691 | * timeout value even if the card indicates | |
692 | * the 250ms maximum busy length." Even the | |
693 | * previous value of 300ms is known to be | |
694 | * insufficient for some cards. | |
493890e7 | 695 | */ |
3bdc9ba8 | 696 | limit_us = 3000000; |
d773d725 RK |
697 | else |
698 | limit_us = 100000; | |
699 | ||
fba68bd2 PL |
700 | /* |
701 | * SDHC cards always use these fixed values. | |
702 | */ | |
6ca2920d | 703 | if (timeout_us > limit_us) { |
d773d725 RK |
704 | data->timeout_ns = limit_us * 1000; |
705 | data->timeout_clks = 0; | |
706 | } | |
f7bf11a3 SW |
707 | |
708 | /* assign limit value if invalid */ | |
709 | if (timeout_us == 0) | |
710 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 711 | } |
6de5fc9c SNX |
712 | |
713 | /* | |
714 | * Some cards require longer data read timeout than indicated in CSD. | |
715 | * Address this by setting the read timeout to a "reasonably high" | |
32ecd320 | 716 | * value. For the cards tested, 600ms has proven enough. If necessary, |
6de5fc9c SNX |
717 | * this value can be increased if other problematic cards require this. |
718 | */ | |
719 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
32ecd320 | 720 | data->timeout_ns = 600000000; |
6de5fc9c SNX |
721 | data->timeout_clks = 0; |
722 | } | |
723 | ||
c0c88871 WM |
724 | /* |
725 | * Some cards need very high timeouts if driven in SPI mode. | |
726 | * The worst observed timeout was 900ms after writing a | |
727 | * continuous stream of data until the internal logic | |
728 | * overflowed. | |
729 | */ | |
730 | if (mmc_host_is_spi(card->host)) { | |
731 | if (data->flags & MMC_DATA_WRITE) { | |
732 | if (data->timeout_ns < 1000000000) | |
733 | data->timeout_ns = 1000000000; /* 1s */ | |
734 | } else { | |
735 | if (data->timeout_ns < 100000000) | |
736 | data->timeout_ns = 100000000; /* 100ms */ | |
737 | } | |
738 | } | |
d773d725 RK |
739 | } |
740 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
741 | ||
6c0cedd1 AH |
742 | /* |
743 | * Allow claiming an already claimed host if the context is the same or there is | |
744 | * no context but the task is the same. | |
745 | */ | |
746 | static inline bool mmc_ctx_matches(struct mmc_host *host, struct mmc_ctx *ctx, | |
747 | struct task_struct *task) | |
748 | { | |
749 | return host->claimer == ctx || | |
750 | (!ctx && task && host->claimer->task == task); | |
751 | } | |
752 | ||
753 | static inline void mmc_ctx_set_claimer(struct mmc_host *host, | |
754 | struct mmc_ctx *ctx, | |
755 | struct task_struct *task) | |
756 | { | |
757 | if (!host->claimer) { | |
758 | if (ctx) | |
759 | host->claimer = ctx; | |
760 | else | |
761 | host->claimer = &host->default_ctx; | |
762 | } | |
763 | if (task) | |
764 | host->claimer->task = task; | |
765 | } | |
766 | ||
1da177e4 | 767 | /** |
2342f332 | 768 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 769 | * @host: mmc host to claim |
6c0cedd1 AH |
770 | * @ctx: context that claims the host or NULL in which case the default |
771 | * context will be used | |
2342f332 | 772 | * @abort: whether or not the operation should be aborted |
1da177e4 | 773 | * |
2342f332 NP |
774 | * Claim a host for a set of operations. If @abort is non null and |
775 | * dereference a non-zero value then this will return prematurely with | |
776 | * that non-zero value without acquiring the lock. Returns zero | |
777 | * with the lock held otherwise. | |
1da177e4 | 778 | */ |
6c0cedd1 AH |
779 | int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx, |
780 | atomic_t *abort) | |
1da177e4 | 781 | { |
6c0cedd1 | 782 | struct task_struct *task = ctx ? NULL : current; |
1da177e4 LT |
783 | DECLARE_WAITQUEUE(wait, current); |
784 | unsigned long flags; | |
2342f332 | 785 | int stop; |
9250aea7 | 786 | bool pm = false; |
1da177e4 | 787 | |
cf795bfb PO |
788 | might_sleep(); |
789 | ||
1da177e4 LT |
790 | add_wait_queue(&host->wq, &wait); |
791 | spin_lock_irqsave(&host->lock, flags); | |
792 | while (1) { | |
793 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 794 | stop = abort ? atomic_read(abort) : 0; |
6c0cedd1 | 795 | if (stop || !host->claimed || mmc_ctx_matches(host, ctx, task)) |
1da177e4 LT |
796 | break; |
797 | spin_unlock_irqrestore(&host->lock, flags); | |
798 | schedule(); | |
799 | spin_lock_irqsave(&host->lock, flags); | |
800 | } | |
801 | set_current_state(TASK_RUNNING); | |
319a3f14 | 802 | if (!stop) { |
2342f332 | 803 | host->claimed = 1; |
6c0cedd1 | 804 | mmc_ctx_set_claimer(host, ctx, task); |
319a3f14 | 805 | host->claim_cnt += 1; |
9250aea7 UH |
806 | if (host->claim_cnt == 1) |
807 | pm = true; | |
319a3f14 | 808 | } else |
2342f332 | 809 | wake_up(&host->wq); |
1da177e4 LT |
810 | spin_unlock_irqrestore(&host->lock, flags); |
811 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
812 | |
813 | if (pm) | |
814 | pm_runtime_get_sync(mmc_dev(host)); | |
815 | ||
2342f332 | 816 | return stop; |
1da177e4 | 817 | } |
2342f332 | 818 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 819 | |
ab1efd27 | 820 | /** |
907d2e7c | 821 | * mmc_release_host - release a host |
ab1efd27 UH |
822 | * @host: mmc host to release |
823 | * | |
907d2e7c AH |
824 | * Release a MMC host, allowing others to claim the host |
825 | * for their operations. | |
ab1efd27 | 826 | */ |
907d2e7c | 827 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
828 | { |
829 | unsigned long flags; | |
830 | ||
907d2e7c AH |
831 | WARN_ON(!host->claimed); |
832 | ||
8ea926b2 | 833 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
834 | if (--host->claim_cnt) { |
835 | /* Release for nested claim */ | |
836 | spin_unlock_irqrestore(&host->lock, flags); | |
837 | } else { | |
838 | host->claimed = 0; | |
6c0cedd1 | 839 | host->claimer->task = NULL; |
319a3f14 AH |
840 | host->claimer = NULL; |
841 | spin_unlock_irqrestore(&host->lock, flags); | |
842 | wake_up(&host->wq); | |
9250aea7 | 843 | pm_runtime_mark_last_busy(mmc_dev(host)); |
7d5ef512 UH |
844 | if (host->caps & MMC_CAP_SYNC_RUNTIME_PM) |
845 | pm_runtime_put_sync_suspend(mmc_dev(host)); | |
846 | else | |
847 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 848 | } |
8ea926b2 | 849 | } |
1da177e4 LT |
850 | EXPORT_SYMBOL(mmc_release_host); |
851 | ||
e94cfef6 UH |
852 | /* |
853 | * This is a helper function, which fetches a runtime pm reference for the | |
854 | * card device and also claims the host. | |
855 | */ | |
6c0cedd1 | 856 | void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx) |
e94cfef6 UH |
857 | { |
858 | pm_runtime_get_sync(&card->dev); | |
6c0cedd1 | 859 | __mmc_claim_host(card->host, ctx, NULL); |
e94cfef6 UH |
860 | } |
861 | EXPORT_SYMBOL(mmc_get_card); | |
862 | ||
863 | /* | |
864 | * This is a helper function, which releases the host and drops the runtime | |
865 | * pm reference for the card device. | |
866 | */ | |
6c0cedd1 | 867 | void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx) |
e94cfef6 | 868 | { |
6c0cedd1 AH |
869 | struct mmc_host *host = card->host; |
870 | ||
871 | WARN_ON(ctx && host->claimer != ctx); | |
872 | ||
873 | mmc_release_host(host); | |
e94cfef6 UH |
874 | pm_runtime_mark_last_busy(&card->dev); |
875 | pm_runtime_put_autosuspend(&card->dev); | |
876 | } | |
877 | EXPORT_SYMBOL(mmc_put_card); | |
878 | ||
7ea239d9 PO |
879 | /* |
880 | * Internal function that does the actual ios call to the host driver, | |
881 | * optionally printing some debug output. | |
882 | */ | |
920e70c5 RK |
883 | static inline void mmc_set_ios(struct mmc_host *host) |
884 | { | |
885 | struct mmc_ios *ios = &host->ios; | |
886 | ||
cd9277c0 PO |
887 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
888 | "width %u timing %u\n", | |
920e70c5 RK |
889 | mmc_hostname(host), ios->clock, ios->bus_mode, |
890 | ios->power_mode, ios->chip_select, ios->vdd, | |
ed9feec7 | 891 | 1 << ios->bus_width, ios->timing); |
fba68bd2 | 892 | |
920e70c5 RK |
893 | host->ops->set_ios(host, ios); |
894 | } | |
895 | ||
7ea239d9 PO |
896 | /* |
897 | * Control chip select pin on a host. | |
898 | */ | |
da7fbe58 | 899 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 900 | { |
da7fbe58 PO |
901 | host->ios.chip_select = mode; |
902 | mmc_set_ios(host); | |
1da177e4 LT |
903 | } |
904 | ||
7ea239d9 PO |
905 | /* |
906 | * Sets the host clock to the highest possible frequency that | |
907 | * is below "hz". | |
908 | */ | |
9eadcc05 | 909 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 910 | { |
6a98f1e8 | 911 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
912 | |
913 | if (hz > host->f_max) | |
914 | hz = host->f_max; | |
915 | ||
916 | host->ios.clock = hz; | |
917 | mmc_set_ios(host); | |
918 | } | |
919 | ||
63e415c6 AH |
920 | int mmc_execute_tuning(struct mmc_card *card) |
921 | { | |
922 | struct mmc_host *host = card->host; | |
923 | u32 opcode; | |
924 | int err; | |
925 | ||
926 | if (!host->ops->execute_tuning) | |
927 | return 0; | |
928 | ||
3e207c8c AH |
929 | if (host->cqe_on) |
930 | host->cqe_ops->cqe_off(host); | |
931 | ||
63e415c6 AH |
932 | if (mmc_card_mmc(card)) |
933 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
934 | else | |
935 | opcode = MMC_SEND_TUNING_BLOCK; | |
936 | ||
63e415c6 | 937 | err = host->ops->execute_tuning(host, opcode); |
63e415c6 AH |
938 | |
939 | if (err) | |
07d97d87 RK |
940 | pr_err("%s: tuning execution failed: %d\n", |
941 | mmc_hostname(host), err); | |
79d5a65a AH |
942 | else |
943 | mmc_retune_enable(host); | |
63e415c6 AH |
944 | |
945 | return err; | |
946 | } | |
947 | ||
7ea239d9 PO |
948 | /* |
949 | * Change the bus mode (open drain/push-pull) of a host. | |
950 | */ | |
951 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
952 | { | |
953 | host->ios.bus_mode = mode; | |
954 | mmc_set_ios(host); | |
955 | } | |
956 | ||
0f8d8ea6 AH |
957 | /* |
958 | * Change data bus width of a host. | |
959 | */ | |
960 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
961 | { | |
4c4cb171 PR |
962 | host->ios.bus_width = width; |
963 | mmc_set_ios(host); | |
0f8d8ea6 AH |
964 | } |
965 | ||
2d079c43 JR |
966 | /* |
967 | * Set initial state after a power cycle or a hw_reset. | |
968 | */ | |
969 | void mmc_set_initial_state(struct mmc_host *host) | |
970 | { | |
3e207c8c AH |
971 | if (host->cqe_on) |
972 | host->cqe_ops->cqe_off(host); | |
973 | ||
79d5a65a AH |
974 | mmc_retune_disable(host); |
975 | ||
2d079c43 JR |
976 | if (mmc_host_is_spi(host)) |
977 | host->ios.chip_select = MMC_CS_HIGH; | |
978 | else | |
979 | host->ios.chip_select = MMC_CS_DONTCARE; | |
980 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
981 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
982 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 983 | host->ios.drv_type = 0; |
81ac2af6 SL |
984 | host->ios.enhanced_strobe = false; |
985 | ||
986 | /* | |
987 | * Make sure we are in non-enhanced strobe mode before we | |
988 | * actually enable it in ext_csd. | |
989 | */ | |
990 | if ((host->caps2 & MMC_CAP2_HS400_ES) && | |
991 | host->ops->hs400_enhanced_strobe) | |
992 | host->ops->hs400_enhanced_strobe(host, &host->ios); | |
2d079c43 JR |
993 | |
994 | mmc_set_ios(host); | |
995 | } | |
996 | ||
86e8286a AV |
997 | /** |
998 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
999 | * @vdd: voltage (mV) | |
1000 | * @low_bits: prefer low bits in boundary cases | |
1001 | * | |
1002 | * This function returns the OCR bit number according to the provided @vdd | |
1003 | * value. If conversion is not possible a negative errno value returned. | |
1004 | * | |
1005 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1006 | * on boundary voltages. For example, | |
1007 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1008 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1009 | * | |
1010 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1011 | */ | |
1012 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1013 | { | |
1014 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1015 | int bit; | |
1016 | ||
1017 | if (vdd < 1650 || vdd > 3600) | |
1018 | return -EINVAL; | |
1019 | ||
1020 | if (vdd >= 1650 && vdd <= 1950) | |
1021 | return ilog2(MMC_VDD_165_195); | |
1022 | ||
1023 | if (low_bits) | |
1024 | vdd -= 1; | |
1025 | ||
1026 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1027 | bit = (vdd - 2000) / 100 + 8; | |
1028 | if (bit > max_bit) | |
1029 | return max_bit; | |
1030 | return bit; | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1035 | * @vdd_min: minimum voltage value (mV) | |
1036 | * @vdd_max: maximum voltage value (mV) | |
1037 | * | |
1038 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1039 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1040 | * | |
1041 | * Notes wrt boundary cases: | |
1042 | * This function sets the OCR bits for all boundary voltages, for example | |
1043 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1044 | * MMC_VDD_34_35 mask. | |
1045 | */ | |
1046 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1047 | { | |
1048 | u32 mask = 0; | |
1049 | ||
1050 | if (vdd_max < vdd_min) | |
1051 | return 0; | |
1052 | ||
1053 | /* Prefer high bits for the boundary vdd_max values. */ | |
1054 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1055 | if (vdd_max < 0) | |
1056 | return 0; | |
1057 | ||
1058 | /* Prefer low bits for the boundary vdd_min values. */ | |
1059 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1060 | if (vdd_min < 0) | |
1061 | return 0; | |
1062 | ||
1063 | /* Fill the mask, from max bit to min bit. */ | |
1064 | while (vdd_max >= vdd_min) | |
1065 | mask |= 1 << vdd_max--; | |
1066 | ||
1067 | return mask; | |
1068 | } | |
86e8286a | 1069 | |
25185f3f SH |
1070 | static int mmc_of_get_func_num(struct device_node *node) |
1071 | { | |
1072 | u32 reg; | |
1073 | int ret; | |
1074 | ||
1075 | ret = of_property_read_u32(node, "reg", ®); | |
1076 | if (ret < 0) | |
1077 | return ret; | |
1078 | ||
1079 | return reg; | |
1080 | } | |
1081 | ||
1082 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1083 | unsigned func_num) | |
1084 | { | |
1085 | struct device_node *node; | |
1086 | ||
1087 | if (!host->parent || !host->parent->of_node) | |
1088 | return NULL; | |
1089 | ||
1090 | for_each_child_of_node(host->parent->of_node, node) { | |
1091 | if (mmc_of_get_func_num(node) == func_num) | |
1092 | return node; | |
1093 | } | |
1094 | ||
1095 | return NULL; | |
1096 | } | |
1097 | ||
1da177e4 LT |
1098 | /* |
1099 | * Mask off any voltages we don't support and select | |
1100 | * the lowest voltage | |
1101 | */ | |
7ea239d9 | 1102 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1103 | { |
1104 | int bit; | |
1105 | ||
726d6f23 UH |
1106 | /* |
1107 | * Sanity check the voltages that the card claims to | |
1108 | * support. | |
1109 | */ | |
1110 | if (ocr & 0x7F) { | |
1111 | dev_warn(mmc_dev(host), | |
1112 | "card claims to support voltages below defined range\n"); | |
1113 | ocr &= ~0x7F; | |
1114 | } | |
1115 | ||
1da177e4 | 1116 | ocr &= host->ocr_avail; |
ce69d37b UH |
1117 | if (!ocr) { |
1118 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1119 | return 0; | |
1120 | } | |
1da177e4 | 1121 | |
ce69d37b UH |
1122 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1123 | bit = ffs(ocr) - 1; | |
63ef731a | 1124 | ocr &= 3 << bit; |
ce69d37b | 1125 | mmc_power_cycle(host, ocr); |
1da177e4 | 1126 | } else { |
ce69d37b UH |
1127 | bit = fls(ocr) - 1; |
1128 | ocr &= 3 << bit; | |
1129 | if (bit != host->ios.vdd) | |
1130 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1131 | } |
1132 | ||
1133 | return ocr; | |
1134 | } | |
1135 | ||
4e74b6b3 | 1136 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
567c8903 JR |
1137 | { |
1138 | int err = 0; | |
1139 | int old_signal_voltage = host->ios.signal_voltage; | |
1140 | ||
1141 | host->ios.signal_voltage = signal_voltage; | |
9eadcc05 | 1142 | if (host->ops->start_signal_voltage_switch) |
567c8903 | 1143 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
567c8903 JR |
1144 | |
1145 | if (err) | |
1146 | host->ios.signal_voltage = old_signal_voltage; | |
1147 | ||
1148 | return err; | |
1149 | ||
1150 | } | |
1151 | ||
508c9864 UH |
1152 | void mmc_set_initial_signal_voltage(struct mmc_host *host) |
1153 | { | |
1154 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ | |
1155 | if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) | |
1156 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1157 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) | |
1158 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1159 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) | |
1160 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
1161 | } | |
1162 | ||
3f496afb AH |
1163 | int mmc_host_set_uhs_voltage(struct mmc_host *host) |
1164 | { | |
1165 | u32 clock; | |
1166 | ||
1167 | /* | |
1168 | * During a signal voltage level switch, the clock must be gated | |
1169 | * for 5 ms according to the SD spec | |
1170 | */ | |
1171 | clock = host->ios.clock; | |
1172 | host->ios.clock = 0; | |
1173 | mmc_set_ios(host); | |
1174 | ||
1175 | if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) | |
1176 | return -EAGAIN; | |
1177 | ||
1178 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ | |
1179 | mmc_delay(10); | |
1180 | host->ios.clock = clock; | |
1181 | mmc_set_ios(host); | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
2ed573b6 | 1186 | int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) |
f2119df6 | 1187 | { |
c7836d15 | 1188 | struct mmc_command cmd = {}; |
f2119df6 AN |
1189 | int err = 0; |
1190 | ||
0797e5f1 JR |
1191 | /* |
1192 | * If we cannot switch voltages, return failure so the caller | |
1193 | * can continue without UHS mode | |
1194 | */ | |
1195 | if (!host->ops->start_signal_voltage_switch) | |
1196 | return -EPERM; | |
1197 | if (!host->ops->card_busy) | |
6606110d JP |
1198 | pr_warn("%s: cannot verify signal voltage switch\n", |
1199 | mmc_hostname(host)); | |
0797e5f1 JR |
1200 | |
1201 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1202 | cmd.arg = 0; | |
1203 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1204 | ||
1205 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1206 | if (err) | |
9eadcc05 UH |
1207 | return err; |
1208 | ||
1209 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1210 | return -EIO; | |
0797e5f1 | 1211 | |
0797e5f1 JR |
1212 | /* |
1213 | * The card should drive cmd and dat[0:3] low immediately | |
1214 | * after the response of cmd11, but wait 1 ms to be sure | |
1215 | */ | |
1216 | mmc_delay(1); | |
1217 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1218 | err = -EAGAIN; | |
1219 | goto power_cycle; | |
1220 | } | |
f2119df6 | 1221 | |
3f496afb | 1222 | if (mmc_host_set_uhs_voltage(host)) { |
0797e5f1 JR |
1223 | /* |
1224 | * Voltages may not have been switched, but we've already | |
1225 | * sent CMD11, so a power cycle is required anyway | |
1226 | */ | |
1227 | err = -EAGAIN; | |
1228 | goto power_cycle; | |
f2119df6 AN |
1229 | } |
1230 | ||
0797e5f1 JR |
1231 | /* Wait for at least 1 ms according to spec */ |
1232 | mmc_delay(1); | |
1233 | ||
1234 | /* | |
1235 | * Failure to switch is indicated by the card holding | |
1236 | * dat[0:3] low | |
1237 | */ | |
1238 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1239 | err = -EAGAIN; | |
1240 | ||
1241 | power_cycle: | |
1242 | if (err) { | |
1243 | pr_debug("%s: Signal voltage switch failed, " | |
1244 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1245 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1246 | } |
1247 | ||
0797e5f1 | 1248 | return err; |
f2119df6 AN |
1249 | } |
1250 | ||
b57c43ad | 1251 | /* |
7ea239d9 | 1252 | * Select timing parameters for host. |
b57c43ad | 1253 | */ |
7ea239d9 | 1254 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1255 | { |
7ea239d9 PO |
1256 | host->ios.timing = timing; |
1257 | mmc_set_ios(host); | |
b57c43ad PO |
1258 | } |
1259 | ||
d6d50a15 AN |
1260 | /* |
1261 | * Select appropriate driver type for host. | |
1262 | */ | |
1263 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1264 | { | |
1265 | host->ios.drv_type = drv_type; | |
1266 | mmc_set_ios(host); | |
1267 | } | |
1268 | ||
e23350b3 AH |
1269 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1270 | int card_drv_type, int *drv_type) | |
1271 | { | |
1272 | struct mmc_host *host = card->host; | |
1273 | int host_drv_type = SD_DRIVER_TYPE_B; | |
e23350b3 AH |
1274 | |
1275 | *drv_type = 0; | |
1276 | ||
1277 | if (!host->ops->select_drive_strength) | |
1278 | return 0; | |
1279 | ||
1280 | /* Use SD definition of driver strength for hosts */ | |
1281 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1282 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1283 | ||
1284 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1285 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1286 | ||
1287 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1288 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1289 | ||
1290 | /* | |
1291 | * The drive strength that the hardware can support | |
1292 | * depends on the board design. Pass the appropriate | |
1293 | * information and let the hardware specific code | |
1294 | * return what is possible given the options | |
1295 | */ | |
9eadcc05 UH |
1296 | return host->ops->select_drive_strength(card, max_dtr, |
1297 | host_drv_type, | |
1298 | card_drv_type, | |
1299 | drv_type); | |
e23350b3 AH |
1300 | } |
1301 | ||
1da177e4 | 1302 | /* |
45f8245b RK |
1303 | * Apply power to the MMC stack. This is a two-stage process. |
1304 | * First, we enable power to the card without the clock running. | |
1305 | * We then wait a bit for the power to stabilise. Finally, | |
1306 | * enable the bus drivers and clock to the card. | |
1307 | * | |
1308 | * We must _NOT_ enable the clock prior to power stablising. | |
1309 | * | |
1310 | * If a host does all the power sequencing itself, ignore the | |
1311 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1312 | */ |
4a065193 | 1313 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1314 | { |
fa550189 UH |
1315 | if (host->ios.power_mode == MMC_POWER_ON) |
1316 | return; | |
1317 | ||
3aa8793f UH |
1318 | mmc_pwrseq_pre_power_on(host); |
1319 | ||
4a065193 | 1320 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1321 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1322 | /* Set initial state and call mmc_set_ios */ |
1323 | mmc_set_initial_state(host); | |
1da177e4 | 1324 | |
508c9864 | 1325 | mmc_set_initial_signal_voltage(host); |
108ecc4c | 1326 | |
f9996aee PO |
1327 | /* |
1328 | * This delay should be sufficient to allow the power supply | |
1329 | * to reach the minimum voltage. | |
1330 | */ | |
6d796c68 | 1331 | mmc_delay(host->ios.power_delay_ms); |
1da177e4 | 1332 | |
4febb7e2 UH |
1333 | mmc_pwrseq_post_power_on(host); |
1334 | ||
88ae8b86 | 1335 | host->ios.clock = host->f_init; |
8dfd0374 | 1336 | |
1da177e4 | 1337 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1338 | mmc_set_ios(host); |
1da177e4 | 1339 | |
f9996aee PO |
1340 | /* |
1341 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1342 | * time required to reach a stable voltage. | |
1343 | */ | |
6d796c68 | 1344 | mmc_delay(host->ios.power_delay_ms); |
1da177e4 LT |
1345 | } |
1346 | ||
7f7e4129 | 1347 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1348 | { |
fa550189 UH |
1349 | if (host->ios.power_mode == MMC_POWER_OFF) |
1350 | return; | |
1351 | ||
3aa8793f UH |
1352 | mmc_pwrseq_power_off(host); |
1353 | ||
1da177e4 LT |
1354 | host->ios.clock = 0; |
1355 | host->ios.vdd = 0; | |
b33d46c3 | 1356 | |
1da177e4 | 1357 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1358 | /* Set initial state and call mmc_set_ios */ |
1359 | mmc_set_initial_state(host); | |
778e277c | 1360 | |
041beb1d DD |
1361 | /* |
1362 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1363 | * XO-1.5, require a short delay after poweroff before the card | |
1364 | * can be successfully turned on again. | |
1365 | */ | |
1366 | mmc_delay(1); | |
1da177e4 LT |
1367 | } |
1368 | ||
4a065193 | 1369 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1370 | { |
1371 | mmc_power_off(host); | |
1372 | /* Wait at least 1 ms according to SD spec */ | |
1373 | mmc_delay(1); | |
4a065193 | 1374 | mmc_power_up(host, ocr); |
276e090f JR |
1375 | } |
1376 | ||
39361851 AB |
1377 | /* |
1378 | * Cleanup when the last reference to the bus operator is dropped. | |
1379 | */ | |
261172fd | 1380 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 | 1381 | { |
6ff897ff | 1382 | WARN_ON(!host->bus_dead); |
39361851 AB |
1383 | |
1384 | host->bus_ops = NULL; | |
1385 | } | |
1386 | ||
1387 | /* | |
1388 | * Increase reference count of bus operator | |
1389 | */ | |
1390 | static inline void mmc_bus_get(struct mmc_host *host) | |
1391 | { | |
1392 | unsigned long flags; | |
1393 | ||
1394 | spin_lock_irqsave(&host->lock, flags); | |
1395 | host->bus_refs++; | |
1396 | spin_unlock_irqrestore(&host->lock, flags); | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Decrease reference count of bus operator and free it if | |
1401 | * it is the last reference. | |
1402 | */ | |
1403 | static inline void mmc_bus_put(struct mmc_host *host) | |
1404 | { | |
1405 | unsigned long flags; | |
1406 | ||
1407 | spin_lock_irqsave(&host->lock, flags); | |
1408 | host->bus_refs--; | |
1409 | if ((host->bus_refs == 0) && host->bus_ops) | |
1410 | __mmc_release_bus(host); | |
1411 | spin_unlock_irqrestore(&host->lock, flags); | |
1412 | } | |
1413 | ||
1da177e4 | 1414 | /* |
7ea239d9 PO |
1415 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1416 | * host at any given time. | |
1da177e4 | 1417 | */ |
7ea239d9 | 1418 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1419 | { |
7ea239d9 | 1420 | unsigned long flags; |
e45a1bd2 | 1421 | |
d84075c8 | 1422 | WARN_ON(!host->claimed); |
bce40a36 | 1423 | |
7ea239d9 | 1424 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1425 | |
6ff897ff SL |
1426 | WARN_ON(host->bus_ops); |
1427 | WARN_ON(host->bus_refs); | |
b57c43ad | 1428 | |
7ea239d9 PO |
1429 | host->bus_ops = ops; |
1430 | host->bus_refs = 1; | |
1431 | host->bus_dead = 0; | |
b57c43ad | 1432 | |
7ea239d9 | 1433 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1434 | } |
1435 | ||
7ea239d9 | 1436 | /* |
7f7e4129 | 1437 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1438 | */ |
1439 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1440 | { |
7ea239d9 | 1441 | unsigned long flags; |
7ccd266e | 1442 | |
d84075c8 PO |
1443 | WARN_ON(!host->claimed); |
1444 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1445 | |
7ea239d9 | 1446 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1447 | |
7ea239d9 | 1448 | host->bus_dead = 1; |
7ccd266e | 1449 | |
7ea239d9 | 1450 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1451 | |
7ea239d9 | 1452 | mmc_bus_put(host); |
1da177e4 LT |
1453 | } |
1454 | ||
2ac55d5e | 1455 | void _mmc_detect_change(struct mmc_host *host, unsigned long delay, bool cd_irq) |
bbd43682 | 1456 | { |
bbd43682 UH |
1457 | /* |
1458 | * If the device is configured as wakeup, we prevent a new sleep for | |
1459 | * 5 s to give provision for user space to consume the event. | |
1460 | */ | |
1461 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1462 | device_can_wakeup(mmc_dev(host))) | |
1463 | pm_wakeup_event(mmc_dev(host), 5000); | |
1464 | ||
1465 | host->detect_change = 1; | |
1466 | mmc_schedule_delayed_work(&host->detect, delay); | |
1467 | } | |
1468 | ||
1da177e4 LT |
1469 | /** |
1470 | * mmc_detect_change - process change of state on a MMC socket | |
1471 | * @host: host which changed state. | |
8dc00335 | 1472 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1473 | * |
67a61c48 PO |
1474 | * MMC drivers should call this when they detect a card has been |
1475 | * inserted or removed. The MMC layer will confirm that any | |
1476 | * present card is still functional, and initialize any newly | |
1477 | * inserted. | |
1da177e4 | 1478 | */ |
8dc00335 | 1479 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1480 | { |
bbd43682 | 1481 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1482 | } |
1da177e4 LT |
1483 | EXPORT_SYMBOL(mmc_detect_change); |
1484 | ||
dfe86cba AH |
1485 | void mmc_init_erase(struct mmc_card *card) |
1486 | { | |
1487 | unsigned int sz; | |
1488 | ||
1489 | if (is_power_of_2(card->erase_size)) | |
1490 | card->erase_shift = ffs(card->erase_size) - 1; | |
1491 | else | |
1492 | card->erase_shift = 0; | |
1493 | ||
1494 | /* | |
1495 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1496 | * card. That is not desirable because it can take a long time | |
1497 | * (minutes) potentially delaying more important I/O, and also the | |
1498 | * timeout calculations become increasingly hugely over-estimated. | |
1499 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1500 | * to that size and alignment. | |
1501 | * | |
1502 | * For SD cards that define Allocation Unit size, limit erases to one | |
c6d8fd61 GG |
1503 | * Allocation Unit at a time. |
1504 | * For MMC, have a stab at ai good value and for modern cards it will | |
1505 | * end up being 4MiB. Note that if the value is too small, it can end | |
1506 | * up taking longer to erase. Also note, erase_size is already set to | |
1507 | * High Capacity Erase Size if available when this function is called. | |
dfe86cba AH |
1508 | */ |
1509 | if (mmc_card_sd(card) && card->ssr.au) { | |
1510 | card->pref_erase = card->ssr.au; | |
1511 | card->erase_shift = ffs(card->ssr.au) - 1; | |
cc8aa7de | 1512 | } else if (card->erase_size) { |
dfe86cba AH |
1513 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1514 | if (sz < 128) | |
1515 | card->pref_erase = 512 * 1024 / 512; | |
1516 | else if (sz < 512) | |
1517 | card->pref_erase = 1024 * 1024 / 512; | |
1518 | else if (sz < 1024) | |
1519 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1520 | else | |
1521 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1522 | if (card->pref_erase < card->erase_size) | |
1523 | card->pref_erase = card->erase_size; | |
1524 | else { | |
1525 | sz = card->pref_erase % card->erase_size; | |
1526 | if (sz) | |
1527 | card->pref_erase += card->erase_size - sz; | |
1528 | } | |
cc8aa7de CD |
1529 | } else |
1530 | card->pref_erase = 0; | |
dfe86cba AH |
1531 | } |
1532 | ||
eaa02f75 AW |
1533 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1534 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1535 | { |
1536 | unsigned int erase_timeout; | |
1537 | ||
7194efb8 AH |
1538 | if (arg == MMC_DISCARD_ARG || |
1539 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1540 | erase_timeout = card->ext_csd.trim_timeout; | |
1541 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1542 | /* High Capacity Erase Group Size uses HC timeouts */ |
1543 | if (arg == MMC_TRIM_ARG) | |
1544 | erase_timeout = card->ext_csd.trim_timeout; | |
1545 | else | |
1546 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1547 | } else { | |
1548 | /* CSD Erase Group Size uses write timeout */ | |
1549 | unsigned int mult = (10 << card->csd.r2w_factor); | |
4406ae21 | 1550 | unsigned int timeout_clks = card->csd.taac_clks * mult; |
dfe86cba AH |
1551 | unsigned int timeout_us; |
1552 | ||
4406ae21 SL |
1553 | /* Avoid overflow: e.g. taac_ns=80000000 mult=1280 */ |
1554 | if (card->csd.taac_ns < 1000000) | |
1555 | timeout_us = (card->csd.taac_ns * mult) / 1000; | |
dfe86cba | 1556 | else |
4406ae21 | 1557 | timeout_us = (card->csd.taac_ns / 1000) * mult; |
dfe86cba AH |
1558 | |
1559 | /* | |
1560 | * ios.clock is only a target. The real clock rate might be | |
1561 | * less but not that much less, so fudge it by multiplying by 2. | |
1562 | */ | |
1563 | timeout_clks <<= 1; | |
1564 | timeout_us += (timeout_clks * 1000) / | |
9eadcc05 | 1565 | (card->host->ios.clock / 1000); |
dfe86cba AH |
1566 | |
1567 | erase_timeout = timeout_us / 1000; | |
1568 | ||
1569 | /* | |
1570 | * Theoretically, the calculation could underflow so round up | |
1571 | * to 1ms in that case. | |
1572 | */ | |
1573 | if (!erase_timeout) | |
1574 | erase_timeout = 1; | |
1575 | } | |
1576 | ||
1577 | /* Multiplier for secure operations */ | |
1578 | if (arg & MMC_SECURE_ARGS) { | |
1579 | if (arg == MMC_SECURE_ERASE_ARG) | |
1580 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1581 | else | |
1582 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1583 | } | |
1584 | ||
1585 | erase_timeout *= qty; | |
1586 | ||
1587 | /* | |
1588 | * Ensure at least a 1 second timeout for SPI as per | |
1589 | * 'mmc_set_data_timeout()' | |
1590 | */ | |
1591 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
1592 | erase_timeout = 1000; | |
1593 | ||
eaa02f75 | 1594 | return erase_timeout; |
dfe86cba AH |
1595 | } |
1596 | ||
eaa02f75 AW |
1597 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
1598 | unsigned int arg, | |
1599 | unsigned int qty) | |
dfe86cba | 1600 | { |
eaa02f75 AW |
1601 | unsigned int erase_timeout; |
1602 | ||
ad9be7ff AA |
1603 | /* for DISCARD none of the below calculation applies. |
1604 | * the busy timeout is 250msec per discard command. | |
1605 | */ | |
1606 | if (arg == SD_DISCARD_ARG) | |
1607 | return SD_DISCARD_TIMEOUT_MS; | |
1608 | ||
dfe86cba AH |
1609 | if (card->ssr.erase_timeout) { |
1610 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
1611 | erase_timeout = card->ssr.erase_timeout * qty + |
1612 | card->ssr.erase_offset; | |
dfe86cba AH |
1613 | } else { |
1614 | /* | |
1615 | * Erase timeout not specified in SD Status Register (SSR) so | |
1616 | * use 250ms per write block. | |
1617 | */ | |
eaa02f75 | 1618 | erase_timeout = 250 * qty; |
dfe86cba AH |
1619 | } |
1620 | ||
1621 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
1622 | if (erase_timeout < 1000) |
1623 | erase_timeout = 1000; | |
1624 | ||
1625 | return erase_timeout; | |
dfe86cba AH |
1626 | } |
1627 | ||
eaa02f75 AW |
1628 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
1629 | unsigned int arg, | |
1630 | unsigned int qty) | |
dfe86cba AH |
1631 | { |
1632 | if (mmc_card_sd(card)) | |
eaa02f75 | 1633 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 1634 | else |
eaa02f75 | 1635 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1636 | } |
1637 | ||
1638 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
1639 | unsigned int to, unsigned int arg) | |
1640 | { | |
c7836d15 | 1641 | struct mmc_command cmd = {}; |
bb4eecf2 BW |
1642 | unsigned int qty = 0, busy_timeout = 0; |
1643 | bool use_r1b_resp = false; | |
dfe86cba AH |
1644 | int err; |
1645 | ||
8f11d106 AH |
1646 | mmc_retune_hold(card->host); |
1647 | ||
dfe86cba AH |
1648 | /* |
1649 | * qty is used to calculate the erase timeout which depends on how many | |
1650 | * erase groups (or allocation units in SD terminology) are affected. | |
1651 | * We count erasing part of an erase group as one erase group. | |
1652 | * For SD, the allocation units are always a power of 2. For MMC, the | |
1653 | * erase group size is almost certainly also power of 2, but it does not | |
1654 | * seem to insist on that in the JEDEC standard, so we fall back to | |
1655 | * division in that case. SD may not specify an allocation unit size, | |
1656 | * in which case the timeout is based on the number of write blocks. | |
1657 | * | |
1658 | * Note that the timeout for secure trim 2 will only be correct if the | |
1659 | * number of erase groups specified is the same as the total of all | |
1660 | * preceding secure trim 1 commands. Since the power may have been | |
1661 | * lost since the secure trim 1 commands occurred, it is generally | |
1662 | * impossible to calculate the secure trim 2 timeout correctly. | |
1663 | */ | |
1664 | if (card->erase_shift) | |
1665 | qty += ((to >> card->erase_shift) - | |
1666 | (from >> card->erase_shift)) + 1; | |
1667 | else if (mmc_card_sd(card)) | |
1668 | qty += to - from + 1; | |
1669 | else | |
1670 | qty += ((to / card->erase_size) - | |
1671 | (from / card->erase_size)) + 1; | |
1672 | ||
1673 | if (!mmc_card_blockaddr(card)) { | |
1674 | from <<= 9; | |
1675 | to <<= 9; | |
1676 | } | |
1677 | ||
dfe86cba AH |
1678 | if (mmc_card_sd(card)) |
1679 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
1680 | else | |
1681 | cmd.opcode = MMC_ERASE_GROUP_START; | |
1682 | cmd.arg = from; | |
1683 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1684 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1685 | if (err) { | |
a3c76eb9 | 1686 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 1687 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 1688 | err = -EIO; |
dfe86cba AH |
1689 | goto out; |
1690 | } | |
1691 | ||
1692 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1693 | if (mmc_card_sd(card)) | |
1694 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
1695 | else | |
1696 | cmd.opcode = MMC_ERASE_GROUP_END; | |
1697 | cmd.arg = to; | |
1698 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1699 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1700 | if (err) { | |
a3c76eb9 | 1701 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 1702 | err, cmd.resp[0]); |
67716327 | 1703 | err = -EIO; |
dfe86cba AH |
1704 | goto out; |
1705 | } | |
1706 | ||
1707 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1708 | cmd.opcode = MMC_ERASE; | |
1709 | cmd.arg = arg; | |
bb4eecf2 BW |
1710 | busy_timeout = mmc_erase_timeout(card, arg, qty); |
1711 | /* | |
1712 | * If the host controller supports busy signalling and the timeout for | |
1713 | * the erase operation does not exceed the max_busy_timeout, we should | |
1714 | * use R1B response. Or we need to prevent the host from doing hw busy | |
1715 | * detection, which is done by converting to a R1 response instead. | |
43cc64e5 UH |
1716 | * Note, some hosts requires R1B, which also means they are on their own |
1717 | * when it comes to deal with the busy timeout. | |
bb4eecf2 | 1718 | */ |
43cc64e5 UH |
1719 | if (!(card->host->caps & MMC_CAP_NEED_RSP_BUSY) && |
1720 | card->host->max_busy_timeout && | |
bb4eecf2 BW |
1721 | busy_timeout > card->host->max_busy_timeout) { |
1722 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1723 | } else { | |
1724 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1725 | cmd.busy_timeout = busy_timeout; | |
1726 | use_r1b_resp = true; | |
1727 | } | |
1728 | ||
dfe86cba AH |
1729 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
1730 | if (err) { | |
a3c76eb9 | 1731 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
1732 | err, cmd.resp[0]); |
1733 | err = -EIO; | |
1734 | goto out; | |
1735 | } | |
1736 | ||
1737 | if (mmc_host_is_spi(card->host)) | |
1738 | goto out; | |
1739 | ||
bb4eecf2 BW |
1740 | /* |
1741 | * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling | |
1742 | * shall be avoided. | |
1743 | */ | |
1744 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) | |
1745 | goto out; | |
1746 | ||
0d84c3e6 UH |
1747 | /* Let's poll to find out when the erase operation completes. */ |
1748 | err = mmc_poll_for_busy(card, busy_timeout, MMC_BUSY_ERASE); | |
8fee476b | 1749 | |
dfe86cba | 1750 | out: |
8f11d106 | 1751 | mmc_retune_release(card->host); |
dfe86cba AH |
1752 | return err; |
1753 | } | |
1754 | ||
71085123 BW |
1755 | static unsigned int mmc_align_erase_size(struct mmc_card *card, |
1756 | unsigned int *from, | |
1757 | unsigned int *to, | |
1758 | unsigned int nr) | |
1759 | { | |
1760 | unsigned int from_new = *from, nr_new = nr, rem; | |
1761 | ||
6c689886 BW |
1762 | /* |
1763 | * When the 'card->erase_size' is power of 2, we can use round_up/down() | |
1764 | * to align the erase size efficiently. | |
1765 | */ | |
1766 | if (is_power_of_2(card->erase_size)) { | |
1767 | unsigned int temp = from_new; | |
1768 | ||
1769 | from_new = round_up(temp, card->erase_size); | |
1770 | rem = from_new - temp; | |
1771 | ||
71085123 BW |
1772 | if (nr_new > rem) |
1773 | nr_new -= rem; | |
1774 | else | |
1775 | return 0; | |
71085123 | 1776 | |
6c689886 BW |
1777 | nr_new = round_down(nr_new, card->erase_size); |
1778 | } else { | |
1779 | rem = from_new % card->erase_size; | |
1780 | if (rem) { | |
1781 | rem = card->erase_size - rem; | |
1782 | from_new += rem; | |
1783 | if (nr_new > rem) | |
1784 | nr_new -= rem; | |
1785 | else | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | rem = nr_new % card->erase_size; | |
1790 | if (rem) | |
1791 | nr_new -= rem; | |
1792 | } | |
71085123 BW |
1793 | |
1794 | if (nr_new == 0) | |
1795 | return 0; | |
1796 | ||
1797 | *to = from_new + nr_new; | |
1798 | *from = from_new; | |
1799 | ||
1800 | return nr_new; | |
1801 | } | |
1802 | ||
dfe86cba AH |
1803 | /** |
1804 | * mmc_erase - erase sectors. | |
1805 | * @card: card to erase | |
1806 | * @from: first sector to erase | |
1807 | * @nr: number of sectors to erase | |
bc47e2f6 | 1808 | * @arg: erase command argument |
dfe86cba AH |
1809 | * |
1810 | * Caller must claim host before calling this function. | |
1811 | */ | |
1812 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
1813 | unsigned int arg) | |
1814 | { | |
1815 | unsigned int rem, to = from + nr; | |
642c28ab | 1816 | int err; |
dfe86cba AH |
1817 | |
1818 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
1819 | !(card->csd.cmdclass & CCC_ERASE)) | |
1820 | return -EOPNOTSUPP; | |
1821 | ||
1822 | if (!card->erase_size) | |
1823 | return -EOPNOTSUPP; | |
1824 | ||
bc47e2f6 | 1825 | if (mmc_card_sd(card) && arg != SD_ERASE_ARG && arg != SD_DISCARD_ARG) |
dfe86cba AH |
1826 | return -EOPNOTSUPP; |
1827 | ||
bc47e2f6 | 1828 | if (mmc_card_mmc(card) && (arg & MMC_SECURE_ARGS) && |
dfe86cba AH |
1829 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) |
1830 | return -EOPNOTSUPP; | |
1831 | ||
bc47e2f6 | 1832 | if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) && |
dfe86cba AH |
1833 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) |
1834 | return -EOPNOTSUPP; | |
1835 | ||
1836 | if (arg == MMC_SECURE_ERASE_ARG) { | |
1837 | if (from % card->erase_size || nr % card->erase_size) | |
1838 | return -EINVAL; | |
1839 | } | |
1840 | ||
71085123 BW |
1841 | if (arg == MMC_ERASE_ARG) |
1842 | nr = mmc_align_erase_size(card, &from, &to, nr); | |
dfe86cba AH |
1843 | |
1844 | if (nr == 0) | |
1845 | return 0; | |
1846 | ||
dfe86cba AH |
1847 | if (to <= from) |
1848 | return -EINVAL; | |
1849 | ||
1850 | /* 'from' and 'to' are inclusive */ | |
1851 | to -= 1; | |
1852 | ||
642c28ab DJ |
1853 | /* |
1854 | * Special case where only one erase-group fits in the timeout budget: | |
1855 | * If the region crosses an erase-group boundary on this particular | |
1856 | * case, we will be trimming more than one erase-group which, does not | |
1857 | * fit in the timeout budget of the controller, so we need to split it | |
1858 | * and call mmc_do_erase() twice if necessary. This special case is | |
1859 | * identified by the card->eg_boundary flag. | |
1860 | */ | |
22d7e85f RG |
1861 | rem = card->erase_size - (from % card->erase_size); |
1862 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
1863 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
1864 | from += rem; | |
1865 | if ((err) || (to <= from)) | |
1866 | return err; | |
1867 | } | |
1868 | ||
dfe86cba AH |
1869 | return mmc_do_erase(card, from, to, arg); |
1870 | } | |
1871 | EXPORT_SYMBOL(mmc_erase); | |
1872 | ||
1873 | int mmc_can_erase(struct mmc_card *card) | |
1874 | { | |
1875 | if ((card->host->caps & MMC_CAP_ERASE) && | |
1876 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
1877 | return 1; | |
1878 | return 0; | |
1879 | } | |
1880 | EXPORT_SYMBOL(mmc_can_erase); | |
1881 | ||
1882 | int mmc_can_trim(struct mmc_card *card) | |
1883 | { | |
b5b4ff0a SL |
1884 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
1885 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
1886 | return 1; |
1887 | return 0; | |
1888 | } | |
1889 | EXPORT_SYMBOL(mmc_can_trim); | |
1890 | ||
b3bf9153 KP |
1891 | int mmc_can_discard(struct mmc_card *card) |
1892 | { | |
1893 | /* | |
1894 | * As there's no way to detect the discard support bit at v4.5 | |
1895 | * use the s/w feature support filed. | |
1896 | */ | |
1897 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
1898 | return 1; | |
1899 | return 0; | |
1900 | } | |
1901 | EXPORT_SYMBOL(mmc_can_discard); | |
1902 | ||
d9ddd629 KP |
1903 | int mmc_can_sanitize(struct mmc_card *card) |
1904 | { | |
28302812 AH |
1905 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
1906 | return 0; | |
d9ddd629 KP |
1907 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
1908 | return 1; | |
1909 | return 0; | |
1910 | } | |
d9ddd629 | 1911 | |
dfe86cba AH |
1912 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
1913 | { | |
5204d00f LC |
1914 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
1915 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
1916 | return 1; |
1917 | return 0; | |
1918 | } | |
1919 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
1920 | ||
1921 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
1922 | unsigned int nr) | |
1923 | { | |
1924 | if (!card->erase_size) | |
1925 | return 0; | |
1926 | if (from % card->erase_size || nr % card->erase_size) | |
1927 | return 0; | |
1928 | return 1; | |
1929 | } | |
1930 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 1931 | |
e056a1b5 AH |
1932 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
1933 | unsigned int arg) | |
1934 | { | |
1935 | struct mmc_host *host = card->host; | |
bb4eecf2 | 1936 | unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; |
e056a1b5 | 1937 | unsigned int last_timeout = 0; |
12182aff UH |
1938 | unsigned int max_busy_timeout = host->max_busy_timeout ? |
1939 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; | |
e056a1b5 | 1940 | |
bb4eecf2 | 1941 | if (card->erase_shift) { |
e056a1b5 | 1942 | max_qty = UINT_MAX >> card->erase_shift; |
bb4eecf2 BW |
1943 | min_qty = card->pref_erase >> card->erase_shift; |
1944 | } else if (mmc_card_sd(card)) { | |
e056a1b5 | 1945 | max_qty = UINT_MAX; |
bb4eecf2 BW |
1946 | min_qty = card->pref_erase; |
1947 | } else { | |
e056a1b5 | 1948 | max_qty = UINT_MAX / card->erase_size; |
bb4eecf2 BW |
1949 | min_qty = card->pref_erase / card->erase_size; |
1950 | } | |
e056a1b5 | 1951 | |
bb4eecf2 BW |
1952 | /* |
1953 | * We should not only use 'host->max_busy_timeout' as the limitation | |
1954 | * when deciding the max discard sectors. We should set a balance value | |
1955 | * to improve the erase speed, and it can not get too long timeout at | |
1956 | * the same time. | |
1957 | * | |
1958 | * Here we set 'card->pref_erase' as the minimal discard sectors no | |
1959 | * matter what size of 'host->max_busy_timeout', but if the | |
1960 | * 'host->max_busy_timeout' is large enough for more discard sectors, | |
1961 | * then we can continue to increase the max discard sectors until we | |
12182aff UH |
1962 | * get a balance value. In cases when the 'host->max_busy_timeout' |
1963 | * isn't specified, use the default max erase timeout. | |
bb4eecf2 | 1964 | */ |
e056a1b5 AH |
1965 | do { |
1966 | y = 0; | |
1967 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
1968 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
bb4eecf2 | 1969 | |
12182aff | 1970 | if (qty + x > min_qty && timeout > max_busy_timeout) |
e056a1b5 | 1971 | break; |
bb4eecf2 | 1972 | |
e056a1b5 AH |
1973 | if (timeout < last_timeout) |
1974 | break; | |
1975 | last_timeout = timeout; | |
1976 | y = x; | |
1977 | } | |
1978 | qty += y; | |
1979 | } while (y); | |
1980 | ||
1981 | if (!qty) | |
1982 | return 0; | |
1983 | ||
642c28ab DJ |
1984 | /* |
1985 | * When specifying a sector range to trim, chances are we might cross | |
1986 | * an erase-group boundary even if the amount of sectors is less than | |
1987 | * one erase-group. | |
1988 | * If we can only fit one erase-group in the controller timeout budget, | |
1989 | * we have to care that erase-group boundaries are not crossed by a | |
1990 | * single trim operation. We flag that special case with "eg_boundary". | |
1991 | * In all other cases we can just decrement qty and pretend that we | |
1992 | * always touch (qty + 1) erase-groups as a simple optimization. | |
1993 | */ | |
e056a1b5 | 1994 | if (qty == 1) |
642c28ab DJ |
1995 | card->eg_boundary = 1; |
1996 | else | |
1997 | qty--; | |
e056a1b5 AH |
1998 | |
1999 | /* Convert qty to sectors */ | |
2000 | if (card->erase_shift) | |
642c28ab | 2001 | max_discard = qty << card->erase_shift; |
e056a1b5 | 2002 | else if (mmc_card_sd(card)) |
642c28ab | 2003 | max_discard = qty + 1; |
e056a1b5 | 2004 | else |
642c28ab | 2005 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
2006 | |
2007 | return max_discard; | |
2008 | } | |
2009 | ||
2010 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2011 | { | |
2012 | struct mmc_host *host = card->host; | |
2013 | unsigned int max_discard, max_trim; | |
2014 | ||
e056a1b5 AH |
2015 | /* |
2016 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2017 | * frequence which can change. In that case, the best choice is | |
2018 | * just the preferred erase size. | |
2019 | */ | |
2020 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2021 | return card->pref_erase; | |
2022 | ||
2023 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
d4721339 | 2024 | if (mmc_can_trim(card)) { |
e056a1b5 | 2025 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); |
d4721339 | 2026 | if (max_trim < max_discard || max_discard == 0) |
e056a1b5 AH |
2027 | max_discard = max_trim; |
2028 | } else if (max_discard < card->erase_size) { | |
2029 | max_discard = 0; | |
2030 | } | |
2031 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
12182aff UH |
2032 | mmc_hostname(host), max_discard, host->max_busy_timeout ? |
2033 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); | |
e056a1b5 AH |
2034 | return max_discard; |
2035 | } | |
2036 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2037 | ||
33e6d74d UH |
2038 | bool mmc_card_is_blockaddr(struct mmc_card *card) |
2039 | { | |
2040 | return card ? mmc_card_blockaddr(card) : false; | |
2041 | } | |
2042 | EXPORT_SYMBOL(mmc_card_is_blockaddr); | |
2043 | ||
0f8d8ea6 AH |
2044 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2045 | { | |
c7836d15 | 2046 | struct mmc_command cmd = {}; |
0f8d8ea6 | 2047 | |
1712c937 ZX |
2048 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || |
2049 | mmc_card_hs400(card) || mmc_card_hs400es(card)) | |
0f8d8ea6 AH |
2050 | return 0; |
2051 | ||
0f8d8ea6 AH |
2052 | cmd.opcode = MMC_SET_BLOCKLEN; |
2053 | cmd.arg = blocklen; | |
2054 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2055 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2056 | } | |
2057 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2058 | ||
b2499518 AH |
2059 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2060 | { | |
52c8212d UH |
2061 | mmc_pwrseq_reset(host); |
2062 | ||
b2499518 AH |
2063 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
2064 | return; | |
b2499518 | 2065 | host->ops->hw_reset(host); |
b2499518 AH |
2066 | } |
2067 | ||
83533ab2 | 2068 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2069 | { |
f855a371 | 2070 | int ret; |
b2499518 | 2071 | |
f855a371 | 2072 | if (!host->card) |
b2499518 AH |
2073 | return -EINVAL; |
2074 | ||
f855a371 | 2075 | mmc_bus_get(host); |
3a3db603 | 2076 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->hw_reset) { |
f855a371 | 2077 | mmc_bus_put(host); |
b2499518 | 2078 | return -EOPNOTSUPP; |
b2499518 AH |
2079 | } |
2080 | ||
3a3db603 | 2081 | ret = host->bus_ops->hw_reset(host); |
f855a371 | 2082 | mmc_bus_put(host); |
b2499518 | 2083 | |
2ac55d5e | 2084 | if (ret < 0) |
3a3db603 | 2085 | pr_warn("%s: tried to HW reset card, got error %d\n", |
4e6c7178 | 2086 | mmc_hostname(host), ret); |
b2499518 | 2087 | |
f855a371 | 2088 | return ret; |
b2499518 | 2089 | } |
b2499518 AH |
2090 | EXPORT_SYMBOL(mmc_hw_reset); |
2091 | ||
1433269c UH |
2092 | int mmc_sw_reset(struct mmc_host *host) |
2093 | { | |
2094 | int ret; | |
2095 | ||
2096 | if (!host->card) | |
2097 | return -EINVAL; | |
2098 | ||
2099 | mmc_bus_get(host); | |
2100 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->sw_reset) { | |
2101 | mmc_bus_put(host); | |
2102 | return -EOPNOTSUPP; | |
2103 | } | |
2104 | ||
2105 | ret = host->bus_ops->sw_reset(host); | |
2106 | mmc_bus_put(host); | |
2107 | ||
2108 | if (ret) | |
2109 | pr_warn("%s: tried to SW reset card, got error %d\n", | |
2110 | mmc_hostname(host), ret); | |
2111 | ||
2112 | return ret; | |
2113 | } | |
2114 | EXPORT_SYMBOL(mmc_sw_reset); | |
2115 | ||
807e8e40 AR |
2116 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2117 | { | |
2118 | host->f_init = freq; | |
2119 | ||
69f25f9b | 2120 | pr_debug("%s: %s: trying to init card at %u Hz\n", |
807e8e40 | 2121 | mmc_hostname(host), __func__, host->f_init); |
69f25f9b | 2122 | |
4a065193 | 2123 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2124 | |
b2499518 AH |
2125 | /* |
2126 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2127 | * do a hardware reset if possible. | |
2128 | */ | |
2129 | mmc_hw_reset_for_init(host); | |
2130 | ||
2f94e55a PR |
2131 | /* |
2132 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2133 | * if the card is being re-initialized, just send it. CMD52 | |
2134 | * should be ignored by SD/eMMC cards. | |
100a606d | 2135 | * Skip it if we already know that we do not support SDIO commands |
2f94e55a | 2136 | */ |
100a606d CC |
2137 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2138 | sdio_reset(host); | |
2139 | ||
807e8e40 AR |
2140 | mmc_go_idle(host); |
2141 | ||
1b8d79c5 UH |
2142 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2143 | mmc_send_if_cond(host, host->ocr_avail); | |
807e8e40 AR |
2144 | |
2145 | /* Order's important: probe SDIO, then SD, then MMC */ | |
100a606d CC |
2146 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2147 | if (!mmc_attach_sdio(host)) | |
2148 | return 0; | |
2149 | ||
1b8d79c5 UH |
2150 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2151 | if (!mmc_attach_sd(host)) | |
2152 | return 0; | |
2153 | ||
a0c3b68c SL |
2154 | if (!(host->caps2 & MMC_CAP2_NO_MMC)) |
2155 | if (!mmc_attach_mmc(host)) | |
2156 | return 0; | |
807e8e40 AR |
2157 | |
2158 | mmc_power_off(host); | |
2159 | return -EIO; | |
2160 | } | |
2161 | ||
d3049504 AH |
2162 | int _mmc_detect_card_removed(struct mmc_host *host) |
2163 | { | |
2164 | int ret; | |
2165 | ||
d3049504 AH |
2166 | if (!host->card || mmc_card_removed(host->card)) |
2167 | return 1; | |
2168 | ||
2169 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2170 | |
2171 | /* | |
2172 | * Card detect status and alive check may be out of sync if card is | |
2173 | * removed slowly, when card detect switch changes while card/slot | |
2174 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2175 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2176 | * detect work 200ms later for this case. | |
2177 | */ | |
2178 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2179 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2180 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2181 | } | |
2182 | ||
d3049504 AH |
2183 | if (ret) { |
2184 | mmc_card_set_removed(host->card); | |
2185 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2186 | } | |
2187 | ||
2188 | return ret; | |
2189 | } | |
2190 | ||
2191 | int mmc_detect_card_removed(struct mmc_host *host) | |
2192 | { | |
2193 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2194 | int ret; |
d3049504 AH |
2195 | |
2196 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2197 | |
2198 | if (!card) | |
2199 | return 1; | |
2200 | ||
6067bafe | 2201 | if (!mmc_card_is_removable(host)) |
1ff2575b UH |
2202 | return 0; |
2203 | ||
f0cc9cf9 | 2204 | ret = mmc_card_removed(card); |
d3049504 AH |
2205 | /* |
2206 | * The card will be considered unchanged unless we have been asked to | |
2207 | * detect a change or host requires polling to provide card detection. | |
2208 | */ | |
b6891679 | 2209 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2210 | return ret; |
d3049504 AH |
2211 | |
2212 | host->detect_change = 0; | |
f0cc9cf9 UH |
2213 | if (!ret) { |
2214 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2215 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2216 | /* |
2217 | * Schedule a detect work as soon as possible to let a | |
2218 | * rescan handle the card removal. | |
2219 | */ | |
2220 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2221 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2222 | } |
2223 | } | |
d3049504 | 2224 | |
f0cc9cf9 | 2225 | return ret; |
d3049504 AH |
2226 | } |
2227 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2228 | ||
b93931a6 | 2229 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2230 | { |
c4028958 DH |
2231 | struct mmc_host *host = |
2232 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2233 | int i; |
4c2ef25f | 2234 | |
807e8e40 | 2235 | if (host->rescan_disable) |
4c2ef25f | 2236 | return; |
1da177e4 | 2237 | |
3339d1e3 | 2238 | /* If there is a non-removable card registered, only scan once */ |
6067bafe | 2239 | if (!mmc_card_is_removable(host) && host->rescan_entered) |
3339d1e3 JR |
2240 | return; |
2241 | host->rescan_entered = 1; | |
2242 | ||
86236813 | 2243 | if (host->trigger_card_event && host->ops->card_event) { |
d234d212 | 2244 | mmc_claim_host(host); |
86236813 | 2245 | host->ops->card_event(host); |
d234d212 | 2246 | mmc_release_host(host); |
86236813 UH |
2247 | host->trigger_card_event = false; |
2248 | } | |
2249 | ||
7ea239d9 | 2250 | mmc_bus_get(host); |
b855885e | 2251 | |
99b4ddd8 UH |
2252 | /* Verify a registered card to be functional, else remove it. */ |
2253 | if (host->bus_ops && !host->bus_dead) | |
94d89efb JS |
2254 | host->bus_ops->detect(host); |
2255 | ||
d3049504 AH |
2256 | host->detect_change = 0; |
2257 | ||
c5841798 CB |
2258 | /* |
2259 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2260 | * the card is no longer present. | |
2261 | */ | |
94d89efb | 2262 | mmc_bus_put(host); |
94d89efb JS |
2263 | mmc_bus_get(host); |
2264 | ||
2265 | /* if there still is a card present, stop here */ | |
2266 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2267 | mmc_bus_put(host); |
94d89efb JS |
2268 | goto out; |
2269 | } | |
1da177e4 | 2270 | |
94d89efb JS |
2271 | /* |
2272 | * Only we can add a new handler, so it's safe to | |
2273 | * release the lock here. | |
2274 | */ | |
2275 | mmc_bus_put(host); | |
1da177e4 | 2276 | |
d234d212 | 2277 | mmc_claim_host(host); |
6067bafe | 2278 | if (mmc_card_is_removable(host) && host->ops->get_cd && |
c1b55bfc | 2279 | host->ops->get_cd(host) == 0) { |
fa550189 UH |
2280 | mmc_power_off(host); |
2281 | mmc_release_host(host); | |
94d89efb | 2282 | goto out; |
fa550189 | 2283 | } |
1da177e4 | 2284 | |
88ae8b86 | 2285 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
661cf2d8 MM |
2286 | unsigned int freq = freqs[i]; |
2287 | if (freq > host->f_max) { | |
2288 | if (i + 1 < ARRAY_SIZE(freqs)) | |
2289 | continue; | |
2290 | freq = host->f_max; | |
2291 | } | |
2292 | if (!mmc_rescan_try_freq(host, max(freq, host->f_min))) | |
807e8e40 | 2293 | break; |
06b2233a | 2294 | if (freqs[i] <= host->f_min) |
807e8e40 | 2295 | break; |
88ae8b86 | 2296 | } |
807e8e40 AR |
2297 | mmc_release_host(host); |
2298 | ||
2299 | out: | |
28f52482 AV |
2300 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2301 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2302 | } |
2303 | ||
b93931a6 | 2304 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2305 | { |
661cf2d8 | 2306 | host->f_init = max(min(freqs[0], host->f_max), host->f_min); |
d9adcc12 | 2307 | host->rescan_disable = 0; |
8af465db | 2308 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
8d1ffc8c | 2309 | |
c2c24819 UH |
2310 | if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) { |
2311 | mmc_claim_host(host); | |
4a065193 | 2312 | mmc_power_up(host, host->ocr_avail); |
c2c24819 UH |
2313 | mmc_release_host(host); |
2314 | } | |
8d1ffc8c | 2315 | |
740a221e | 2316 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2317 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2318 | } |
2319 | ||
b93931a6 | 2320 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2321 | { |
03dbaa04 | 2322 | if (host->slot.cd_irq >= 0) { |
36f1d7e8 | 2323 | mmc_gpio_set_cd_wake(host, false); |
740a221e | 2324 | disable_irq(host->slot.cd_irq); |
03dbaa04 | 2325 | } |
3b91e550 | 2326 | |
d9adcc12 | 2327 | host->rescan_disable = 1; |
d9bcbf34 | 2328 | cancel_delayed_work_sync(&host->detect); |
3b91e550 | 2329 | |
da68c4eb NP |
2330 | /* clear pm flags now and let card drivers set them as needed */ |
2331 | host->pm_flags = 0; | |
2332 | ||
7ea239d9 PO |
2333 | mmc_bus_get(host); |
2334 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2335 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2336 | host->bus_ops->remove(host); |
7ea239d9 PO |
2337 | mmc_claim_host(host); |
2338 | mmc_detach_bus(host); | |
7f7e4129 | 2339 | mmc_power_off(host); |
7ea239d9 | 2340 | mmc_release_host(host); |
53509f0f DK |
2341 | mmc_bus_put(host); |
2342 | return; | |
1da177e4 | 2343 | } |
7ea239d9 PO |
2344 | mmc_bus_put(host); |
2345 | ||
8d1ffc8c | 2346 | mmc_claim_host(host); |
1da177e4 | 2347 | mmc_power_off(host); |
8d1ffc8c | 2348 | mmc_release_host(host); |
1da177e4 LT |
2349 | } |
2350 | ||
8dede18e | 2351 | #ifdef CONFIG_PM_SLEEP |
4c2ef25f ML |
2352 | /* Do the card removal on suspend if card is assumed removeable |
2353 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2354 | to sync the card. | |
2355 | */ | |
8dede18e UH |
2356 | static int mmc_pm_notify(struct notifier_block *notify_block, |
2357 | unsigned long mode, void *unused) | |
4c2ef25f ML |
2358 | { |
2359 | struct mmc_host *host = container_of( | |
2360 | notify_block, struct mmc_host, pm_notify); | |
2361 | unsigned long flags; | |
810caddb | 2362 | int err = 0; |
4c2ef25f ML |
2363 | |
2364 | switch (mode) { | |
2365 | case PM_HIBERNATION_PREPARE: | |
2366 | case PM_SUSPEND_PREPARE: | |
184af16b | 2367 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2368 | spin_lock_irqsave(&host->lock, flags); |
2369 | host->rescan_disable = 1; | |
2370 | spin_unlock_irqrestore(&host->lock, flags); | |
2371 | cancel_delayed_work_sync(&host->detect); | |
2372 | ||
810caddb UH |
2373 | if (!host->bus_ops) |
2374 | break; | |
2375 | ||
2376 | /* Validate prerequisites for suspend */ | |
2377 | if (host->bus_ops->pre_suspend) | |
2378 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2379 | if (!err) |
4c2ef25f ML |
2380 | break; |
2381 | ||
de8dcc3d DD |
2382 | if (!mmc_card_is_removable(host)) { |
2383 | dev_warn(mmc_dev(host), | |
2384 | "pre_suspend failed for non-removable host: " | |
2385 | "%d\n", err); | |
2386 | /* Avoid removing non-removable hosts */ | |
2387 | break; | |
2388 | } | |
2389 | ||
0db13fc2 | 2390 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2391 | host->bus_ops->remove(host); |
0db13fc2 | 2392 | mmc_claim_host(host); |
4c2ef25f | 2393 | mmc_detach_bus(host); |
7f7e4129 | 2394 | mmc_power_off(host); |
4c2ef25f ML |
2395 | mmc_release_host(host); |
2396 | host->pm_flags = 0; | |
2397 | break; | |
2398 | ||
2399 | case PM_POST_SUSPEND: | |
2400 | case PM_POST_HIBERNATION: | |
274476f8 | 2401 | case PM_POST_RESTORE: |
4c2ef25f ML |
2402 | |
2403 | spin_lock_irqsave(&host->lock, flags); | |
2404 | host->rescan_disable = 0; | |
2405 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2406 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2407 | |
2408 | } | |
2409 | ||
2410 | return 0; | |
2411 | } | |
8dede18e UH |
2412 | |
2413 | void mmc_register_pm_notifier(struct mmc_host *host) | |
2414 | { | |
2415 | host->pm_notify.notifier_call = mmc_pm_notify; | |
2416 | register_pm_notifier(&host->pm_notify); | |
2417 | } | |
2418 | ||
2419 | void mmc_unregister_pm_notifier(struct mmc_host *host) | |
2420 | { | |
2421 | unregister_pm_notifier(&host->pm_notify); | |
2422 | } | |
1da177e4 LT |
2423 | #endif |
2424 | ||
ffce2e7e PO |
2425 | static int __init mmc_init(void) |
2426 | { | |
2427 | int ret; | |
2428 | ||
ffce2e7e | 2429 | ret = mmc_register_bus(); |
e29a7d73 | 2430 | if (ret) |
520bd7a8 | 2431 | return ret; |
e29a7d73 PO |
2432 | |
2433 | ret = mmc_register_host_class(); | |
2434 | if (ret) | |
2435 | goto unregister_bus; | |
2436 | ||
2437 | ret = sdio_register_bus(); | |
2438 | if (ret) | |
2439 | goto unregister_host_class; | |
2440 | ||
2441 | return 0; | |
2442 | ||
2443 | unregister_host_class: | |
2444 | mmc_unregister_host_class(); | |
2445 | unregister_bus: | |
2446 | mmc_unregister_bus(); | |
ffce2e7e PO |
2447 | return ret; |
2448 | } | |
2449 | ||
2450 | static void __exit mmc_exit(void) | |
2451 | { | |
e29a7d73 | 2452 | sdio_unregister_bus(); |
ffce2e7e PO |
2453 | mmc_unregister_host_class(); |
2454 | mmc_unregister_bus(); | |
ffce2e7e PO |
2455 | } |
2456 | ||
26074962 | 2457 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2458 | module_exit(mmc_exit); |
2459 | ||
1da177e4 | 2460 | MODULE_LICENSE("GPL"); |