Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
aaac1b47 | 2 | * linux/drivers/mmc/core/core.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5b4fd9ae | 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
ad3868b2 | 6 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
bce40a36 | 7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/err.h> | |
af8350c7 | 21 | #include <linux/leds.h> |
b57c43ad | 22 | #include <linux/scatterlist.h> |
86e8286a | 23 | #include <linux/log2.h> |
5c13941a | 24 | #include <linux/regulator/consumer.h> |
e594573d | 25 | #include <linux/pm_runtime.h> |
bbd43682 | 26 | #include <linux/pm_wakeup.h> |
35eb6db1 | 27 | #include <linux/suspend.h> |
1b676f70 PF |
28 | #include <linux/fault-inject.h> |
29 | #include <linux/random.h> | |
950d56ac | 30 | #include <linux/slab.h> |
6e9e318b | 31 | #include <linux/of.h> |
1da177e4 LT |
32 | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/host.h> | |
da7fbe58 PO |
35 | #include <linux/mmc/mmc.h> |
36 | #include <linux/mmc/sd.h> | |
740a221e | 37 | #include <linux/mmc/slot-gpio.h> |
1da177e4 | 38 | |
7962fc37 BW |
39 | #define CREATE_TRACE_POINTS |
40 | #include <trace/events/mmc.h> | |
41 | ||
aaac1b47 | 42 | #include "core.h" |
4facdde1 | 43 | #include "card.h" |
ffce2e7e PO |
44 | #include "bus.h" |
45 | #include "host.h" | |
e29a7d73 | 46 | #include "sdio_bus.h" |
3aa8793f | 47 | #include "pwrseq.h" |
da7fbe58 PO |
48 | |
49 | #include "mmc_ops.h" | |
50 | #include "sd_ops.h" | |
5c4e6f13 | 51 | #include "sdio_ops.h" |
1da177e4 | 52 | |
8fee476b TR |
53 | /* If the device is not responding */ |
54 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ | |
55 | ||
12182aff UH |
56 | /* The max erase timeout, used when host->max_busy_timeout isn't specified */ |
57 | #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ | |
58 | ||
fa550189 | 59 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 60 | |
af517150 DB |
61 | /* |
62 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
63 | * performance cost, and for other reasons may not always be desired. | |
64 | * So we allow it it to be disabled. | |
65 | */ | |
90ab5ee9 | 66 | bool use_spi_crc = 1; |
af517150 DB |
67 | module_param(use_spi_crc, bool, 0); |
68 | ||
ffce2e7e PO |
69 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
70 | unsigned long delay) | |
71 | { | |
520bd7a8 UH |
72 | /* |
73 | * We use the system_freezable_wq, because of two reasons. | |
74 | * First, it allows several works (not the same work item) to be | |
75 | * executed simultaneously. Second, the queue becomes frozen when | |
76 | * userspace becomes frozen during system PM. | |
77 | */ | |
78 | return queue_delayed_work(system_freezable_wq, work, delay); | |
ffce2e7e PO |
79 | } |
80 | ||
1b676f70 PF |
81 | #ifdef CONFIG_FAIL_MMC_REQUEST |
82 | ||
83 | /* | |
84 | * Internal function. Inject random data errors. | |
85 | * If mmc_data is NULL no errors are injected. | |
86 | */ | |
87 | static void mmc_should_fail_request(struct mmc_host *host, | |
88 | struct mmc_request *mrq) | |
89 | { | |
90 | struct mmc_command *cmd = mrq->cmd; | |
91 | struct mmc_data *data = mrq->data; | |
92 | static const int data_errors[] = { | |
93 | -ETIMEDOUT, | |
94 | -EILSEQ, | |
95 | -EIO, | |
96 | }; | |
97 | ||
98 | if (!data) | |
99 | return; | |
100 | ||
101 | if (cmd->error || data->error || | |
102 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) | |
103 | return; | |
104 | ||
2e744fcb AM |
105 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
106 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
107 | } |
108 | ||
109 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
110 | ||
111 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
112 | struct mmc_request *mrq) | |
113 | { | |
114 | } | |
115 | ||
116 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
117 | ||
5163af5a AH |
118 | static inline void mmc_complete_cmd(struct mmc_request *mrq) |
119 | { | |
120 | if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) | |
121 | complete_all(&mrq->cmd_completion); | |
122 | } | |
123 | ||
124 | void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) | |
125 | { | |
126 | if (!mrq->cap_cmd_during_tfr) | |
127 | return; | |
128 | ||
129 | mmc_complete_cmd(mrq); | |
130 | ||
131 | pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", | |
132 | mmc_hostname(host), mrq->cmd->opcode); | |
133 | } | |
134 | EXPORT_SYMBOL(mmc_command_done); | |
135 | ||
1da177e4 | 136 | /** |
fe10c6ab RK |
137 | * mmc_request_done - finish processing an MMC request |
138 | * @host: MMC host which completed request | |
139 | * @mrq: MMC request which request | |
1da177e4 LT |
140 | * |
141 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 142 | * their processing of a request. |
1da177e4 LT |
143 | */ |
144 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
145 | { | |
146 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
147 | int err = cmd->error; |
148 | ||
bd11e8bd | 149 | /* Flag re-tuning needed on CRC errors */ |
031277d4 CJ |
150 | if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && |
151 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && | |
152 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || | |
bd11e8bd | 153 | (mrq->data && mrq->data->error == -EILSEQ) || |
031277d4 | 154 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
bd11e8bd AH |
155 | mmc_retune_needed(host); |
156 | ||
af517150 DB |
157 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
158 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
159 | cmd->retries = 0; | |
160 | } | |
161 | ||
5163af5a AH |
162 | if (host->ongoing_mrq == mrq) |
163 | host->ongoing_mrq = NULL; | |
164 | ||
165 | mmc_complete_cmd(mrq); | |
166 | ||
7962fc37 BW |
167 | trace_mmc_request_done(host, mrq); |
168 | ||
67b8360a LW |
169 | /* |
170 | * We list various conditions for the command to be considered | |
171 | * properly done: | |
172 | * | |
173 | * - There was no error, OK fine then | |
174 | * - We are not doing some kind of retry | |
175 | * - The card was removed (...so just complete everything no matter | |
176 | * if there are errors or retries) | |
177 | */ | |
178 | if (!err || !cmd->retries || mmc_card_removed(host->card)) { | |
1b676f70 PF |
179 | mmc_should_fail_request(host, mrq); |
180 | ||
5163af5a AH |
181 | if (!host->ongoing_mrq) |
182 | led_trigger_event(host->led, LED_OFF); | |
af8350c7 | 183 | |
fc75b708 AG |
184 | if (mrq->sbc) { |
185 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
186 | mmc_hostname(host), mrq->sbc->opcode, | |
187 | mrq->sbc->error, | |
188 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
189 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
190 | } | |
191 | ||
e4d21708 PO |
192 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
193 | mmc_hostname(host), cmd->opcode, err, | |
194 | cmd->resp[0], cmd->resp[1], | |
195 | cmd->resp[2], cmd->resp[3]); | |
196 | ||
197 | if (mrq->data) { | |
198 | pr_debug("%s: %d bytes transferred: %d\n", | |
199 | mmc_hostname(host), | |
200 | mrq->data->bytes_xfered, mrq->data->error); | |
201 | } | |
202 | ||
203 | if (mrq->stop) { | |
204 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
205 | mmc_hostname(host), mrq->stop->opcode, | |
206 | mrq->stop->error, | |
207 | mrq->stop->resp[0], mrq->stop->resp[1], | |
208 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
209 | } | |
1da177e4 | 210 | } |
67b8360a LW |
211 | /* |
212 | * Request starter must handle retries - see | |
213 | * mmc_wait_for_req_done(). | |
214 | */ | |
215 | if (mrq->done) | |
216 | mrq->done(mrq); | |
1da177e4 LT |
217 | } |
218 | ||
219 | EXPORT_SYMBOL(mmc_request_done); | |
220 | ||
90a81489 AH |
221 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
222 | { | |
223 | int err; | |
224 | ||
225 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
226 | err = mmc_retune(host); | |
227 | if (err) { | |
228 | mrq->cmd->error = err; | |
229 | mmc_request_done(host, mrq); | |
230 | return; | |
231 | } | |
232 | ||
5d3f6ef0 HG |
233 | /* |
234 | * For sdio rw commands we must wait for card busy otherwise some | |
235 | * sdio devices won't work properly. | |
f328c76e | 236 | * And bypass I/O abort, reset and bus suspend operations. |
5d3f6ef0 | 237 | */ |
f328c76e | 238 | if (sdio_is_io_busy(mrq->cmd->opcode, mrq->cmd->arg) && |
239 | host->ops->card_busy) { | |
5d3f6ef0 HG |
240 | int tries = 500; /* Wait aprox 500ms at maximum */ |
241 | ||
242 | while (host->ops->card_busy(host) && --tries) | |
243 | mmc_delay(1); | |
244 | ||
245 | if (tries == 0) { | |
246 | mrq->cmd->error = -EBUSY; | |
247 | mmc_request_done(host, mrq); | |
248 | return; | |
249 | } | |
250 | } | |
251 | ||
5163af5a AH |
252 | if (mrq->cap_cmd_during_tfr) { |
253 | host->ongoing_mrq = mrq; | |
254 | /* | |
255 | * Retry path could come through here without having waiting on | |
256 | * cmd_completion, so ensure it is reinitialised. | |
257 | */ | |
258 | reinit_completion(&mrq->cmd_completion); | |
259 | } | |
260 | ||
7962fc37 BW |
261 | trace_mmc_request_start(host, mrq); |
262 | ||
3e207c8c AH |
263 | if (host->cqe_on) |
264 | host->cqe_ops->cqe_off(host); | |
265 | ||
90a81489 AH |
266 | host->ops->request(host, mrq); |
267 | } | |
268 | ||
4b67e63f | 269 | static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq) |
1da177e4 | 270 | { |
7b2fd4f2 JC |
271 | if (mrq->sbc) { |
272 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
273 | mmc_hostname(host), mrq->sbc->opcode, | |
274 | mrq->sbc->arg, mrq->sbc->flags); | |
275 | } | |
276 | ||
4b67e63f AH |
277 | if (mrq->cmd) { |
278 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", | |
279 | mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->arg, | |
280 | mrq->cmd->flags); | |
281 | } | |
1da177e4 | 282 | |
e4d21708 PO |
283 | if (mrq->data) { |
284 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
285 | "tsac %d ms nsac %d\n", | |
286 | mmc_hostname(host), mrq->data->blksz, | |
287 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 288 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
289 | mrq->data->timeout_clks); |
290 | } | |
291 | ||
292 | if (mrq->stop) { | |
293 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
294 | mmc_hostname(host), mrq->stop->opcode, | |
295 | mrq->stop->arg, mrq->stop->flags); | |
296 | } | |
4b67e63f AH |
297 | } |
298 | ||
f34bdd2f | 299 | static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq) |
4b67e63f | 300 | { |
b044b1bc | 301 | unsigned int i, sz = 0; |
4b67e63f | 302 | struct scatterlist *sg; |
1da177e4 | 303 | |
f34bdd2f AH |
304 | if (mrq->cmd) { |
305 | mrq->cmd->error = 0; | |
306 | mrq->cmd->mrq = mrq; | |
307 | mrq->cmd->data = mrq->data; | |
308 | } | |
cce411e6 AG |
309 | if (mrq->sbc) { |
310 | mrq->sbc->error = 0; | |
311 | mrq->sbc->mrq = mrq; | |
312 | } | |
1da177e4 | 313 | if (mrq->data) { |
6ff897ff SL |
314 | if (mrq->data->blksz > host->max_blk_size || |
315 | mrq->data->blocks > host->max_blk_count || | |
316 | mrq->data->blocks * mrq->data->blksz > host->max_req_size) | |
317 | return -EINVAL; | |
b044b1bc | 318 | |
a84756c5 PO |
319 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
320 | sz += sg->length; | |
6ff897ff SL |
321 | if (sz != mrq->data->blocks * mrq->data->blksz) |
322 | return -EINVAL; | |
b044b1bc | 323 | |
1da177e4 LT |
324 | mrq->data->error = 0; |
325 | mrq->data->mrq = mrq; | |
326 | if (mrq->stop) { | |
327 | mrq->data->stop = mrq->stop; | |
328 | mrq->stop->error = 0; | |
329 | mrq->stop->mrq = mrq; | |
330 | } | |
331 | } | |
f34bdd2f AH |
332 | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) | |
337 | { | |
338 | int err; | |
339 | ||
340 | mmc_retune_hold(host); | |
341 | ||
342 | if (mmc_card_removed(host->card)) | |
343 | return -ENOMEDIUM; | |
344 | ||
345 | mmc_mrq_pr_debug(host, mrq); | |
346 | ||
347 | WARN_ON(!host->claimed); | |
348 | ||
349 | err = mmc_mrq_prep(host, mrq); | |
350 | if (err) | |
351 | return err; | |
352 | ||
66c036e0 | 353 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 354 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
355 | |
356 | return 0; | |
1da177e4 LT |
357 | } |
358 | ||
2220eedf KD |
359 | /* |
360 | * mmc_wait_data_done() - done callback for data request | |
361 | * @mrq: done data request | |
362 | * | |
363 | * Wakes up mmc context, passed as a callback to host controller driver | |
364 | */ | |
365 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
366 | { | |
71f8a4b8 JF |
367 | struct mmc_context_info *context_info = &mrq->host->context_info; |
368 | ||
369 | context_info->is_done_rcv = true; | |
370 | wake_up_interruptible(&context_info->wait); | |
2220eedf KD |
371 | } |
372 | ||
1da177e4 LT |
373 | static void mmc_wait_done(struct mmc_request *mrq) |
374 | { | |
aa8b683a PF |
375 | complete(&mrq->completion); |
376 | } | |
377 | ||
5163af5a AH |
378 | static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) |
379 | { | |
380 | struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); | |
381 | ||
382 | /* | |
383 | * If there is an ongoing transfer, wait for the command line to become | |
384 | * available. | |
385 | */ | |
386 | if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) | |
387 | wait_for_completion(&ongoing_mrq->cmd_completion); | |
388 | } | |
389 | ||
2220eedf KD |
390 | /* |
391 | *__mmc_start_data_req() - starts data request | |
392 | * @host: MMC host to start the request | |
393 | * @mrq: data request to start | |
394 | * | |
395 | * Sets the done callback to be called when request is completed by the card. | |
396 | * Starts data mmc request execution | |
5163af5a AH |
397 | * If an ongoing transfer is already in progress, wait for the command line |
398 | * to become available before sending another command. | |
2220eedf KD |
399 | */ |
400 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
401 | { | |
f100c1c2 AH |
402 | int err; |
403 | ||
5163af5a AH |
404 | mmc_wait_ongoing_tfr_cmd(host); |
405 | ||
2220eedf KD |
406 | mrq->done = mmc_wait_data_done; |
407 | mrq->host = host; | |
f100c1c2 | 408 | |
5163af5a AH |
409 | init_completion(&mrq->cmd_completion); |
410 | ||
f100c1c2 AH |
411 | err = mmc_start_request(host, mrq); |
412 | if (err) { | |
413 | mrq->cmd->error = err; | |
5163af5a | 414 | mmc_complete_cmd(mrq); |
9b844961 | 415 | mmc_wait_data_done(mrq); |
2220eedf | 416 | } |
2220eedf | 417 | |
f100c1c2 | 418 | return err; |
2220eedf KD |
419 | } |
420 | ||
956d9fd5 | 421 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 422 | { |
f100c1c2 AH |
423 | int err; |
424 | ||
5163af5a AH |
425 | mmc_wait_ongoing_tfr_cmd(host); |
426 | ||
aa8b683a PF |
427 | init_completion(&mrq->completion); |
428 | mrq->done = mmc_wait_done; | |
f100c1c2 | 429 | |
5163af5a AH |
430 | init_completion(&mrq->cmd_completion); |
431 | ||
f100c1c2 AH |
432 | err = mmc_start_request(host, mrq); |
433 | if (err) { | |
434 | mrq->cmd->error = err; | |
5163af5a | 435 | mmc_complete_cmd(mrq); |
d3049504 | 436 | complete(&mrq->completion); |
d3049504 | 437 | } |
f100c1c2 AH |
438 | |
439 | return err; | |
aa8b683a PF |
440 | } |
441 | ||
5163af5a | 442 | void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 443 | { |
08a7e1df AH |
444 | struct mmc_command *cmd; |
445 | ||
446 | while (1) { | |
447 | wait_for_completion(&mrq->completion); | |
448 | ||
449 | cmd = mrq->cmd; | |
775a9362 ME |
450 | |
451 | /* | |
452 | * If host has timed out waiting for the sanitize | |
453 | * to complete, card might be still in programming state | |
454 | * so let's try to bring the card out of programming | |
455 | * state. | |
456 | */ | |
457 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
458 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
459 | pr_warn("%s: %s: Interrupted sanitize\n", |
460 | mmc_hostname(host), __func__); | |
775a9362 ME |
461 | cmd->error = 0; |
462 | break; | |
463 | } else { | |
464 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
465 | mmc_hostname(host), __func__); | |
466 | } | |
467 | } | |
d3049504 AH |
468 | if (!cmd->error || !cmd->retries || |
469 | mmc_card_removed(host->card)) | |
08a7e1df AH |
470 | break; |
471 | ||
90a81489 AH |
472 | mmc_retune_recheck(host); |
473 | ||
08a7e1df AH |
474 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
475 | mmc_hostname(host), cmd->opcode, cmd->error); | |
476 | cmd->retries--; | |
477 | cmd->error = 0; | |
90a81489 | 478 | __mmc_start_request(host, mrq); |
08a7e1df | 479 | } |
90a81489 AH |
480 | |
481 | mmc_retune_release(host); | |
aa8b683a | 482 | } |
5163af5a AH |
483 | EXPORT_SYMBOL(mmc_wait_for_req_done); |
484 | ||
485 | /** | |
486 | * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done | |
487 | * @host: MMC host | |
488 | * @mrq: MMC request | |
489 | * | |
490 | * mmc_is_req_done() is used with requests that have | |
491 | * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after | |
492 | * starting a request and before waiting for it to complete. That is, | |
493 | * either in between calls to mmc_start_req(), or after mmc_wait_for_req() | |
494 | * and before mmc_wait_for_req_done(). If it is called at other times the | |
495 | * result is not meaningful. | |
496 | */ | |
497 | bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) | |
498 | { | |
499 | if (host->areq) | |
500 | return host->context_info.is_done_rcv; | |
501 | else | |
502 | return completion_done(&mrq->completion); | |
503 | } | |
504 | EXPORT_SYMBOL(mmc_is_req_done); | |
aa8b683a PF |
505 | |
506 | /** | |
507 | * mmc_pre_req - Prepare for a new request | |
508 | * @host: MMC host to prepare command | |
509 | * @mrq: MMC request to prepare for | |
aa8b683a PF |
510 | * |
511 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
512 | * host prepare for the new request. Preparation of a request may be | |
513 | * performed while another request is running on the host. | |
514 | */ | |
d3c6aac3 | 515 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 516 | { |
9eadcc05 | 517 | if (host->ops->pre_req) |
d3c6aac3 | 518 | host->ops->pre_req(host, mrq); |
aa8b683a PF |
519 | } |
520 | ||
521 | /** | |
522 | * mmc_post_req - Post process a completed request | |
523 | * @host: MMC host to post process command | |
524 | * @mrq: MMC request to post process for | |
525 | * @err: Error, if non zero, clean up any resources made in pre_req | |
526 | * | |
527 | * Let the host post process a completed request. Post processing of | |
528 | * a request may be performed while another reuqest is running. | |
529 | */ | |
530 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
531 | int err) | |
532 | { | |
9eadcc05 | 533 | if (host->ops->post_req) |
aa8b683a | 534 | host->ops->post_req(host, mrq, err); |
1da177e4 LT |
535 | } |
536 | ||
37dac068 LW |
537 | /** |
538 | * mmc_finalize_areq() - finalize an asynchronous request | |
539 | * @host: MMC host to finalize any ongoing request on | |
540 | * | |
541 | * Returns the status of the ongoing asynchronous request, but | |
542 | * MMC_BLK_SUCCESS if no request was going on. | |
543 | */ | |
544 | static enum mmc_blk_status mmc_finalize_areq(struct mmc_host *host) | |
545 | { | |
0e72f95b | 546 | struct mmc_context_info *context_info = &host->context_info; |
37dac068 LW |
547 | enum mmc_blk_status status; |
548 | ||
549 | if (!host->areq) | |
550 | return MMC_BLK_SUCCESS; | |
551 | ||
0e72f95b LW |
552 | while (1) { |
553 | wait_event_interruptible(context_info->wait, | |
554 | (context_info->is_done_rcv || | |
555 | context_info->is_new_req)); | |
556 | ||
557 | if (context_info->is_done_rcv) { | |
558 | struct mmc_command *cmd; | |
559 | ||
560 | context_info->is_done_rcv = false; | |
561 | cmd = host->areq->mrq->cmd; | |
562 | ||
563 | if (!cmd->error || !cmd->retries || | |
564 | mmc_card_removed(host->card)) { | |
565 | status = host->areq->err_check(host->card, | |
566 | host->areq); | |
567 | break; /* return status */ | |
568 | } else { | |
569 | mmc_retune_recheck(host); | |
570 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", | |
571 | mmc_hostname(host), | |
572 | cmd->opcode, cmd->error); | |
573 | cmd->retries--; | |
574 | cmd->error = 0; | |
575 | __mmc_start_request(host, host->areq->mrq); | |
576 | continue; /* wait for done/new event again */ | |
577 | } | |
578 | } | |
579 | ||
580 | return MMC_BLK_NEW_REQUEST; | |
581 | } | |
582 | ||
583 | mmc_retune_release(host); | |
37dac068 LW |
584 | |
585 | /* | |
586 | * Check BKOPS urgency for each R1 response | |
587 | */ | |
588 | if (host->card && mmc_card_mmc(host->card) && | |
589 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
590 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
591 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { | |
592 | mmc_start_bkops(host->card, true); | |
593 | } | |
594 | ||
595 | return status; | |
596 | } | |
597 | ||
aa8b683a | 598 | /** |
c3399ef5 | 599 | * mmc_start_areq - start an asynchronous request |
aa8b683a | 600 | * @host: MMC host to start command |
c3399ef5 LW |
601 | * @areq: asynchronous request to start |
602 | * @ret_stat: out parameter for status | |
aa8b683a PF |
603 | * |
604 | * Start a new MMC custom command request for a host. | |
605 | * If there is on ongoing async request wait for completion | |
606 | * of that request and start the new one and return. | |
607 | * Does not wait for the new request to complete. | |
608 | * | |
609 | * Returns the completed request, NULL in case of none completed. | |
610 | * Wait for the an ongoing request (previoulsy started) to complete and | |
611 | * return the completed request. If there is no ongoing request, NULL | |
612 | * is returned without waiting. NULL is not an error condition. | |
613 | */ | |
c3399ef5 LW |
614 | struct mmc_async_req *mmc_start_areq(struct mmc_host *host, |
615 | struct mmc_async_req *areq, | |
616 | enum mmc_blk_status *ret_stat) | |
aa8b683a | 617 | { |
37dac068 | 618 | enum mmc_blk_status status; |
956d9fd5 | 619 | int start_err = 0; |
5744d50d | 620 | struct mmc_async_req *previous = host->areq; |
aa8b683a PF |
621 | |
622 | /* Prepare a new request */ | |
623 | if (areq) | |
d3c6aac3 | 624 | mmc_pre_req(host, areq->mrq); |
aa8b683a | 625 | |
37dac068 LW |
626 | /* Finalize previous request */ |
627 | status = mmc_finalize_areq(host); | |
5744d50d LW |
628 | if (ret_stat) |
629 | *ret_stat = status; | |
37dac068 LW |
630 | |
631 | /* The previous request is still going on... */ | |
5744d50d | 632 | if (status == MMC_BLK_NEW_REQUEST) |
37dac068 | 633 | return NULL; |
aa8b683a | 634 | |
37dac068 | 635 | /* Fine so far, start the new request! */ |
8e8b3f51 | 636 | if (status == MMC_BLK_SUCCESS && areq) |
2220eedf | 637 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a | 638 | |
37dac068 | 639 | /* Postprocess the old request at this point */ |
aa8b683a PF |
640 | if (host->areq) |
641 | mmc_post_req(host, host->areq->mrq, 0); | |
642 | ||
37dac068 | 643 | /* Cancel a prepared request if it was not started. */ |
8e8b3f51 | 644 | if ((status != MMC_BLK_SUCCESS || start_err) && areq) |
f5c2758f | 645 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 | 646 | |
8e8b3f51 | 647 | if (status != MMC_BLK_SUCCESS) |
956d9fd5 UH |
648 | host->areq = NULL; |
649 | else | |
650 | host->areq = areq; | |
651 | ||
5744d50d | 652 | return previous; |
aa8b683a | 653 | } |
c3399ef5 | 654 | EXPORT_SYMBOL(mmc_start_areq); |
aa8b683a | 655 | |
67a61c48 PO |
656 | /** |
657 | * mmc_wait_for_req - start a request and wait for completion | |
658 | * @host: MMC host to start command | |
659 | * @mrq: MMC request to start | |
660 | * | |
661 | * Start a new MMC custom command request for a host, and wait | |
5163af5a AH |
662 | * for the command to complete. In the case of 'cap_cmd_during_tfr' |
663 | * requests, the transfer is ongoing and the caller can issue further | |
664 | * commands that do not use the data lines, and then wait by calling | |
665 | * mmc_wait_for_req_done(). | |
666 | * Does not attempt to parse the response. | |
67a61c48 PO |
667 | */ |
668 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 669 | { |
aa8b683a | 670 | __mmc_start_req(host, mrq); |
5163af5a AH |
671 | |
672 | if (!mrq->cap_cmd_during_tfr) | |
673 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 674 | } |
1da177e4 LT |
675 | EXPORT_SYMBOL(mmc_wait_for_req); |
676 | ||
677 | /** | |
678 | * mmc_wait_for_cmd - start a command and wait for completion | |
679 | * @host: MMC host to start command | |
680 | * @cmd: MMC command to start | |
681 | * @retries: maximum number of retries | |
682 | * | |
683 | * Start a new MMC command for a host, and wait for the command | |
684 | * to complete. Return any error that occurred while the command | |
685 | * was executing. Do not attempt to parse the response. | |
686 | */ | |
687 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
688 | { | |
c7836d15 | 689 | struct mmc_request mrq = {}; |
1da177e4 | 690 | |
d84075c8 | 691 | WARN_ON(!host->claimed); |
1da177e4 | 692 | |
1da177e4 LT |
693 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
694 | cmd->retries = retries; | |
695 | ||
696 | mrq.cmd = cmd; | |
697 | cmd->data = NULL; | |
698 | ||
699 | mmc_wait_for_req(host, &mrq); | |
700 | ||
701 | return cmd->error; | |
702 | } | |
703 | ||
704 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
705 | ||
d773d725 RK |
706 | /** |
707 | * mmc_set_data_timeout - set the timeout for a data command | |
708 | * @data: data phase for command | |
709 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
710 | * |
711 | * Computes the data timeout parameters according to the | |
712 | * correct algorithm given the card type. | |
d773d725 | 713 | */ |
b146d26a | 714 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
715 | { |
716 | unsigned int mult; | |
717 | ||
e6f918bf PO |
718 | /* |
719 | * SDIO cards only define an upper 1 s limit on access. | |
720 | */ | |
721 | if (mmc_card_sdio(card)) { | |
722 | data->timeout_ns = 1000000000; | |
723 | data->timeout_clks = 0; | |
724 | return; | |
725 | } | |
726 | ||
d773d725 RK |
727 | /* |
728 | * SD cards use a 100 multiplier rather than 10 | |
729 | */ | |
730 | mult = mmc_card_sd(card) ? 100 : 10; | |
731 | ||
732 | /* | |
733 | * Scale up the multiplier (and therefore the timeout) by | |
734 | * the r2w factor for writes. | |
735 | */ | |
b146d26a | 736 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
737 | mult <<= card->csd.r2w_factor; |
738 | ||
4406ae21 SL |
739 | data->timeout_ns = card->csd.taac_ns * mult; |
740 | data->timeout_clks = card->csd.taac_clks * mult; | |
d773d725 RK |
741 | |
742 | /* | |
743 | * SD cards also have an upper limit on the timeout. | |
744 | */ | |
745 | if (mmc_card_sd(card)) { | |
746 | unsigned int timeout_us, limit_us; | |
747 | ||
748 | timeout_us = data->timeout_ns / 1000; | |
9eadcc05 | 749 | if (card->host->ios.clock) |
e9b86841 | 750 | timeout_us += data->timeout_clks * 1000 / |
9eadcc05 | 751 | (card->host->ios.clock / 1000); |
d773d725 | 752 | |
b146d26a | 753 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 754 | /* |
3bdc9ba8 PW |
755 | * The MMC spec "It is strongly recommended |
756 | * for hosts to implement more than 500ms | |
757 | * timeout value even if the card indicates | |
758 | * the 250ms maximum busy length." Even the | |
759 | * previous value of 300ms is known to be | |
760 | * insufficient for some cards. | |
493890e7 | 761 | */ |
3bdc9ba8 | 762 | limit_us = 3000000; |
d773d725 RK |
763 | else |
764 | limit_us = 100000; | |
765 | ||
fba68bd2 PL |
766 | /* |
767 | * SDHC cards always use these fixed values. | |
768 | */ | |
6ca2920d | 769 | if (timeout_us > limit_us) { |
d773d725 RK |
770 | data->timeout_ns = limit_us * 1000; |
771 | data->timeout_clks = 0; | |
772 | } | |
f7bf11a3 SW |
773 | |
774 | /* assign limit value if invalid */ | |
775 | if (timeout_us == 0) | |
776 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 777 | } |
6de5fc9c SNX |
778 | |
779 | /* | |
780 | * Some cards require longer data read timeout than indicated in CSD. | |
781 | * Address this by setting the read timeout to a "reasonably high" | |
32ecd320 | 782 | * value. For the cards tested, 600ms has proven enough. If necessary, |
6de5fc9c SNX |
783 | * this value can be increased if other problematic cards require this. |
784 | */ | |
785 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
32ecd320 | 786 | data->timeout_ns = 600000000; |
6de5fc9c SNX |
787 | data->timeout_clks = 0; |
788 | } | |
789 | ||
c0c88871 WM |
790 | /* |
791 | * Some cards need very high timeouts if driven in SPI mode. | |
792 | * The worst observed timeout was 900ms after writing a | |
793 | * continuous stream of data until the internal logic | |
794 | * overflowed. | |
795 | */ | |
796 | if (mmc_host_is_spi(card->host)) { | |
797 | if (data->flags & MMC_DATA_WRITE) { | |
798 | if (data->timeout_ns < 1000000000) | |
799 | data->timeout_ns = 1000000000; /* 1s */ | |
800 | } else { | |
801 | if (data->timeout_ns < 100000000) | |
802 | data->timeout_ns = 100000000; /* 100ms */ | |
803 | } | |
804 | } | |
d773d725 RK |
805 | } |
806 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
807 | ||
ad3868b2 PO |
808 | /** |
809 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
810 | * @card: the MMC card associated with the data transfer | |
811 | * @sz: original transfer size | |
812 | * | |
813 | * Pads the original data size with a number of extra bytes in | |
814 | * order to avoid controller bugs and/or performance hits | |
815 | * (e.g. some controllers revert to PIO for certain sizes). | |
816 | * | |
817 | * Returns the improved size, which might be unmodified. | |
818 | * | |
819 | * Note that this function is only relevant when issuing a | |
820 | * single scatter gather entry. | |
821 | */ | |
822 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
823 | { | |
824 | /* | |
825 | * FIXME: We don't have a system for the controller to tell | |
826 | * the core about its problems yet, so for now we just 32-bit | |
827 | * align the size. | |
828 | */ | |
829 | sz = ((sz + 3) / 4) * 4; | |
830 | ||
831 | return sz; | |
832 | } | |
833 | EXPORT_SYMBOL(mmc_align_data_size); | |
834 | ||
1da177e4 | 835 | /** |
2342f332 | 836 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 837 | * @host: mmc host to claim |
2342f332 | 838 | * @abort: whether or not the operation should be aborted |
1da177e4 | 839 | * |
2342f332 NP |
840 | * Claim a host for a set of operations. If @abort is non null and |
841 | * dereference a non-zero value then this will return prematurely with | |
842 | * that non-zero value without acquiring the lock. Returns zero | |
843 | * with the lock held otherwise. | |
1da177e4 | 844 | */ |
2342f332 | 845 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
846 | { |
847 | DECLARE_WAITQUEUE(wait, current); | |
848 | unsigned long flags; | |
2342f332 | 849 | int stop; |
9250aea7 | 850 | bool pm = false; |
1da177e4 | 851 | |
cf795bfb PO |
852 | might_sleep(); |
853 | ||
1da177e4 LT |
854 | add_wait_queue(&host->wq, &wait); |
855 | spin_lock_irqsave(&host->lock, flags); | |
856 | while (1) { | |
857 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 858 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 859 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
860 | break; |
861 | spin_unlock_irqrestore(&host->lock, flags); | |
862 | schedule(); | |
863 | spin_lock_irqsave(&host->lock, flags); | |
864 | } | |
865 | set_current_state(TASK_RUNNING); | |
319a3f14 | 866 | if (!stop) { |
2342f332 | 867 | host->claimed = 1; |
319a3f14 AH |
868 | host->claimer = current; |
869 | host->claim_cnt += 1; | |
9250aea7 UH |
870 | if (host->claim_cnt == 1) |
871 | pm = true; | |
319a3f14 | 872 | } else |
2342f332 | 873 | wake_up(&host->wq); |
1da177e4 LT |
874 | spin_unlock_irqrestore(&host->lock, flags); |
875 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
876 | |
877 | if (pm) | |
878 | pm_runtime_get_sync(mmc_dev(host)); | |
879 | ||
2342f332 | 880 | return stop; |
1da177e4 | 881 | } |
2342f332 | 882 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 883 | |
ab1efd27 | 884 | /** |
907d2e7c | 885 | * mmc_release_host - release a host |
ab1efd27 UH |
886 | * @host: mmc host to release |
887 | * | |
907d2e7c AH |
888 | * Release a MMC host, allowing others to claim the host |
889 | * for their operations. | |
ab1efd27 | 890 | */ |
907d2e7c | 891 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
892 | { |
893 | unsigned long flags; | |
894 | ||
907d2e7c AH |
895 | WARN_ON(!host->claimed); |
896 | ||
8ea926b2 | 897 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
898 | if (--host->claim_cnt) { |
899 | /* Release for nested claim */ | |
900 | spin_unlock_irqrestore(&host->lock, flags); | |
901 | } else { | |
902 | host->claimed = 0; | |
903 | host->claimer = NULL; | |
904 | spin_unlock_irqrestore(&host->lock, flags); | |
905 | wake_up(&host->wq); | |
9250aea7 UH |
906 | pm_runtime_mark_last_busy(mmc_dev(host)); |
907 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 908 | } |
8ea926b2 | 909 | } |
1da177e4 LT |
910 | EXPORT_SYMBOL(mmc_release_host); |
911 | ||
e94cfef6 UH |
912 | /* |
913 | * This is a helper function, which fetches a runtime pm reference for the | |
914 | * card device and also claims the host. | |
915 | */ | |
916 | void mmc_get_card(struct mmc_card *card) | |
917 | { | |
918 | pm_runtime_get_sync(&card->dev); | |
919 | mmc_claim_host(card->host); | |
920 | } | |
921 | EXPORT_SYMBOL(mmc_get_card); | |
922 | ||
923 | /* | |
924 | * This is a helper function, which releases the host and drops the runtime | |
925 | * pm reference for the card device. | |
926 | */ | |
927 | void mmc_put_card(struct mmc_card *card) | |
928 | { | |
929 | mmc_release_host(card->host); | |
930 | pm_runtime_mark_last_busy(&card->dev); | |
931 | pm_runtime_put_autosuspend(&card->dev); | |
932 | } | |
933 | EXPORT_SYMBOL(mmc_put_card); | |
934 | ||
7ea239d9 PO |
935 | /* |
936 | * Internal function that does the actual ios call to the host driver, | |
937 | * optionally printing some debug output. | |
938 | */ | |
920e70c5 RK |
939 | static inline void mmc_set_ios(struct mmc_host *host) |
940 | { | |
941 | struct mmc_ios *ios = &host->ios; | |
942 | ||
cd9277c0 PO |
943 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
944 | "width %u timing %u\n", | |
920e70c5 RK |
945 | mmc_hostname(host), ios->clock, ios->bus_mode, |
946 | ios->power_mode, ios->chip_select, ios->vdd, | |
ed9feec7 | 947 | 1 << ios->bus_width, ios->timing); |
fba68bd2 | 948 | |
920e70c5 RK |
949 | host->ops->set_ios(host, ios); |
950 | } | |
951 | ||
7ea239d9 PO |
952 | /* |
953 | * Control chip select pin on a host. | |
954 | */ | |
da7fbe58 | 955 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 956 | { |
da7fbe58 PO |
957 | host->ios.chip_select = mode; |
958 | mmc_set_ios(host); | |
1da177e4 LT |
959 | } |
960 | ||
7ea239d9 PO |
961 | /* |
962 | * Sets the host clock to the highest possible frequency that | |
963 | * is below "hz". | |
964 | */ | |
9eadcc05 | 965 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 966 | { |
6a98f1e8 | 967 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
968 | |
969 | if (hz > host->f_max) | |
970 | hz = host->f_max; | |
971 | ||
972 | host->ios.clock = hz; | |
973 | mmc_set_ios(host); | |
974 | } | |
975 | ||
63e415c6 AH |
976 | int mmc_execute_tuning(struct mmc_card *card) |
977 | { | |
978 | struct mmc_host *host = card->host; | |
979 | u32 opcode; | |
980 | int err; | |
981 | ||
982 | if (!host->ops->execute_tuning) | |
983 | return 0; | |
984 | ||
3e207c8c AH |
985 | if (host->cqe_on) |
986 | host->cqe_ops->cqe_off(host); | |
987 | ||
63e415c6 AH |
988 | if (mmc_card_mmc(card)) |
989 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
990 | else | |
991 | opcode = MMC_SEND_TUNING_BLOCK; | |
992 | ||
63e415c6 | 993 | err = host->ops->execute_tuning(host, opcode); |
63e415c6 AH |
994 | |
995 | if (err) | |
07d97d87 RK |
996 | pr_err("%s: tuning execution failed: %d\n", |
997 | mmc_hostname(host), err); | |
79d5a65a AH |
998 | else |
999 | mmc_retune_enable(host); | |
63e415c6 AH |
1000 | |
1001 | return err; | |
1002 | } | |
1003 | ||
7ea239d9 PO |
1004 | /* |
1005 | * Change the bus mode (open drain/push-pull) of a host. | |
1006 | */ | |
1007 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1008 | { | |
1009 | host->ios.bus_mode = mode; | |
1010 | mmc_set_ios(host); | |
1011 | } | |
1012 | ||
0f8d8ea6 AH |
1013 | /* |
1014 | * Change data bus width of a host. | |
1015 | */ | |
1016 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1017 | { | |
4c4cb171 PR |
1018 | host->ios.bus_width = width; |
1019 | mmc_set_ios(host); | |
0f8d8ea6 AH |
1020 | } |
1021 | ||
2d079c43 JR |
1022 | /* |
1023 | * Set initial state after a power cycle or a hw_reset. | |
1024 | */ | |
1025 | void mmc_set_initial_state(struct mmc_host *host) | |
1026 | { | |
3e207c8c AH |
1027 | if (host->cqe_on) |
1028 | host->cqe_ops->cqe_off(host); | |
1029 | ||
79d5a65a AH |
1030 | mmc_retune_disable(host); |
1031 | ||
2d079c43 JR |
1032 | if (mmc_host_is_spi(host)) |
1033 | host->ios.chip_select = MMC_CS_HIGH; | |
1034 | else | |
1035 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1036 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
1037 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
1038 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 1039 | host->ios.drv_type = 0; |
81ac2af6 SL |
1040 | host->ios.enhanced_strobe = false; |
1041 | ||
1042 | /* | |
1043 | * Make sure we are in non-enhanced strobe mode before we | |
1044 | * actually enable it in ext_csd. | |
1045 | */ | |
1046 | if ((host->caps2 & MMC_CAP2_HS400_ES) && | |
1047 | host->ops->hs400_enhanced_strobe) | |
1048 | host->ops->hs400_enhanced_strobe(host, &host->ios); | |
2d079c43 JR |
1049 | |
1050 | mmc_set_ios(host); | |
1051 | } | |
1052 | ||
86e8286a AV |
1053 | /** |
1054 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1055 | * @vdd: voltage (mV) | |
1056 | * @low_bits: prefer low bits in boundary cases | |
1057 | * | |
1058 | * This function returns the OCR bit number according to the provided @vdd | |
1059 | * value. If conversion is not possible a negative errno value returned. | |
1060 | * | |
1061 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1062 | * on boundary voltages. For example, | |
1063 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1064 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1065 | * | |
1066 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1067 | */ | |
1068 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1069 | { | |
1070 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1071 | int bit; | |
1072 | ||
1073 | if (vdd < 1650 || vdd > 3600) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | if (vdd >= 1650 && vdd <= 1950) | |
1077 | return ilog2(MMC_VDD_165_195); | |
1078 | ||
1079 | if (low_bits) | |
1080 | vdd -= 1; | |
1081 | ||
1082 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1083 | bit = (vdd - 2000) / 100 + 8; | |
1084 | if (bit > max_bit) | |
1085 | return max_bit; | |
1086 | return bit; | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1091 | * @vdd_min: minimum voltage value (mV) | |
1092 | * @vdd_max: maximum voltage value (mV) | |
1093 | * | |
1094 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1095 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1096 | * | |
1097 | * Notes wrt boundary cases: | |
1098 | * This function sets the OCR bits for all boundary voltages, for example | |
1099 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1100 | * MMC_VDD_34_35 mask. | |
1101 | */ | |
1102 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1103 | { | |
1104 | u32 mask = 0; | |
1105 | ||
1106 | if (vdd_max < vdd_min) | |
1107 | return 0; | |
1108 | ||
1109 | /* Prefer high bits for the boundary vdd_max values. */ | |
1110 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1111 | if (vdd_max < 0) | |
1112 | return 0; | |
1113 | ||
1114 | /* Prefer low bits for the boundary vdd_min values. */ | |
1115 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1116 | if (vdd_min < 0) | |
1117 | return 0; | |
1118 | ||
1119 | /* Fill the mask, from max bit to min bit. */ | |
1120 | while (vdd_max >= vdd_min) | |
1121 | mask |= 1 << vdd_max--; | |
1122 | ||
1123 | return mask; | |
1124 | } | |
1125 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1126 | ||
6e9e318b HZ |
1127 | #ifdef CONFIG_OF |
1128 | ||
1129 | /** | |
1130 | * mmc_of_parse_voltage - return mask of supported voltages | |
1131 | * @np: The device node need to be parsed. | |
1132 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1133 | * | |
cf925747 RK |
1134 | * Parse the "voltage-ranges" DT property, returning zero if it is not |
1135 | * found, negative errno if the voltage-range specification is invalid, | |
1136 | * or one if the voltage-range is specified and successfully parsed. | |
6e9e318b HZ |
1137 | */ |
1138 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1139 | { | |
1140 | const u32 *voltage_ranges; | |
1141 | int num_ranges, i; | |
1142 | ||
1143 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1144 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
10a16a01 | 1145 | if (!voltage_ranges) { |
bf892de9 | 1146 | pr_debug("%pOF: voltage-ranges unspecified\n", np); |
cf925747 | 1147 | return 0; |
10a16a01 RK |
1148 | } |
1149 | if (!num_ranges) { | |
bf892de9 | 1150 | pr_err("%pOF: voltage-ranges empty\n", np); |
6e9e318b HZ |
1151 | return -EINVAL; |
1152 | } | |
1153 | ||
1154 | for (i = 0; i < num_ranges; i++) { | |
1155 | const int j = i * 2; | |
1156 | u32 ocr_mask; | |
1157 | ||
1158 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1159 | be32_to_cpu(voltage_ranges[j]), | |
1160 | be32_to_cpu(voltage_ranges[j + 1])); | |
1161 | if (!ocr_mask) { | |
bf892de9 RH |
1162 | pr_err("%pOF: voltage-range #%d is invalid\n", |
1163 | np, i); | |
6e9e318b HZ |
1164 | return -EINVAL; |
1165 | } | |
1166 | *mask |= ocr_mask; | |
1167 | } | |
1168 | ||
cf925747 | 1169 | return 1; |
6e9e318b HZ |
1170 | } |
1171 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1172 | ||
1173 | #endif /* CONFIG_OF */ | |
1174 | ||
25185f3f SH |
1175 | static int mmc_of_get_func_num(struct device_node *node) |
1176 | { | |
1177 | u32 reg; | |
1178 | int ret; | |
1179 | ||
1180 | ret = of_property_read_u32(node, "reg", ®); | |
1181 | if (ret < 0) | |
1182 | return ret; | |
1183 | ||
1184 | return reg; | |
1185 | } | |
1186 | ||
1187 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1188 | unsigned func_num) | |
1189 | { | |
1190 | struct device_node *node; | |
1191 | ||
1192 | if (!host->parent || !host->parent->of_node) | |
1193 | return NULL; | |
1194 | ||
1195 | for_each_child_of_node(host->parent->of_node, node) { | |
1196 | if (mmc_of_get_func_num(node) == func_num) | |
1197 | return node; | |
1198 | } | |
1199 | ||
1200 | return NULL; | |
1201 | } | |
1202 | ||
5c13941a DB |
1203 | #ifdef CONFIG_REGULATOR |
1204 | ||
310c805e HS |
1205 | /** |
1206 | * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage | |
1207 | * @vdd_bit: OCR bit number | |
1208 | * @min_uV: minimum voltage value (mV) | |
1209 | * @max_uV: maximum voltage value (mV) | |
1210 | * | |
1211 | * This function returns the voltage range according to the provided OCR | |
1212 | * bit number. If conversion is not possible a negative errno value returned. | |
1213 | */ | |
1214 | static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV) | |
1215 | { | |
1216 | int tmp; | |
1217 | ||
1218 | if (!vdd_bit) | |
1219 | return -EINVAL; | |
1220 | ||
1221 | /* | |
1222 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
1223 | * bits this regulator doesn't quite support ... don't | |
1224 | * be too picky, most cards and regulators are OK with | |
1225 | * a 0.1V range goof (it's a small error percentage). | |
1226 | */ | |
1227 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1228 | if (tmp == 0) { | |
1229 | *min_uV = 1650 * 1000; | |
1230 | *max_uV = 1950 * 1000; | |
1231 | } else { | |
1232 | *min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1233 | *max_uV = *min_uV + 100 * 1000; | |
1234 | } | |
1235 | ||
1236 | return 0; | |
1237 | } | |
1238 | ||
5c13941a DB |
1239 | /** |
1240 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1241 | * @supply: regulator to use | |
1242 | * | |
1243 | * This returns either a negative errno, or a mask of voltages that | |
1244 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1245 | * regulator. This would normally be called before registering the | |
1246 | * MMC host adapter. | |
1247 | */ | |
1248 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1249 | { | |
1250 | int result = 0; | |
1251 | int count; | |
1252 | int i; | |
9ed7ca89 JMC |
1253 | int vdd_uV; |
1254 | int vdd_mV; | |
5c13941a DB |
1255 | |
1256 | count = regulator_count_voltages(supply); | |
1257 | if (count < 0) | |
1258 | return count; | |
1259 | ||
1260 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1261 | vdd_uV = regulator_list_voltage(supply, i); |
1262 | if (vdd_uV <= 0) | |
1263 | continue; | |
1264 | ||
1265 | vdd_mV = vdd_uV / 1000; | |
1266 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1267 | } | |
1268 | ||
9ed7ca89 JMC |
1269 | if (!result) { |
1270 | vdd_uV = regulator_get_voltage(supply); | |
1271 | if (vdd_uV <= 0) | |
1272 | return vdd_uV; | |
1273 | ||
1274 | vdd_mV = vdd_uV / 1000; | |
1275 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1276 | } | |
1277 | ||
5c13941a DB |
1278 | return result; |
1279 | } | |
45a6b32e | 1280 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1281 | |
1282 | /** | |
1283 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1284 | * @mmc: the host to regulate |
5c13941a | 1285 | * @supply: regulator to use |
99fc5131 | 1286 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1287 | * |
1288 | * Returns zero on success, else negative errno. | |
1289 | * | |
1290 | * MMC host drivers may use this to enable or disable a regulator using | |
1291 | * a particular supply voltage. This would normally be called from the | |
1292 | * set_ios() method. | |
1293 | */ | |
99fc5131 LW |
1294 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1295 | struct regulator *supply, | |
1296 | unsigned short vdd_bit) | |
5c13941a DB |
1297 | { |
1298 | int result = 0; | |
1299 | int min_uV, max_uV; | |
5c13941a DB |
1300 | |
1301 | if (vdd_bit) { | |
310c805e | 1302 | mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV); |
5c13941a | 1303 | |
ca6429d4 | 1304 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1305 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1306 | result = regulator_enable(supply); |
99fc5131 LW |
1307 | if (!result) |
1308 | mmc->regulator_enabled = true; | |
1309 | } | |
1310 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1311 | result = regulator_disable(supply); |
99fc5131 LW |
1312 | if (result == 0) |
1313 | mmc->regulator_enabled = false; | |
5c13941a DB |
1314 | } |
1315 | ||
99fc5131 LW |
1316 | if (result) |
1317 | dev_err(mmc_dev(mmc), | |
1318 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1319 | return result; |
1320 | } | |
45a6b32e | 1321 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1322 | |
2086f801 DA |
1323 | static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator, |
1324 | int min_uV, int target_uV, | |
1325 | int max_uV) | |
1326 | { | |
1327 | /* | |
1328 | * Check if supported first to avoid errors since we may try several | |
1329 | * signal levels during power up and don't want to show errors. | |
1330 | */ | |
1331 | if (!regulator_is_supported_voltage(regulator, min_uV, max_uV)) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | return regulator_set_voltage_triplet(regulator, min_uV, target_uV, | |
1335 | max_uV); | |
1336 | } | |
1337 | ||
1338 | /** | |
1339 | * mmc_regulator_set_vqmmc - Set VQMMC as per the ios | |
1340 | * | |
1341 | * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible. | |
1342 | * That will match the behavior of old boards where VQMMC and VMMC were supplied | |
1343 | * by the same supply. The Bus Operating conditions for 3.3V signaling in the | |
1344 | * SD card spec also define VQMMC in terms of VMMC. | |
1345 | * If this is not possible we'll try the full 2.7-3.6V of the spec. | |
1346 | * | |
1347 | * For 1.2V and 1.8V signaling we'll try to get as close as possible to the | |
1348 | * requested voltage. This is definitely a good idea for UHS where there's a | |
1349 | * separate regulator on the card that's trying to make 1.8V and it's best if | |
1350 | * we match. | |
1351 | * | |
1352 | * This function is expected to be used by a controller's | |
1353 | * start_signal_voltage_switch() function. | |
1354 | */ | |
1355 | int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios) | |
1356 | { | |
1357 | struct device *dev = mmc_dev(mmc); | |
1358 | int ret, volt, min_uV, max_uV; | |
1359 | ||
1360 | /* If no vqmmc supply then we can't change the voltage */ | |
1361 | if (IS_ERR(mmc->supply.vqmmc)) | |
1362 | return -EINVAL; | |
1363 | ||
1364 | switch (ios->signal_voltage) { | |
1365 | case MMC_SIGNAL_VOLTAGE_120: | |
1366 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1367 | 1100000, 1200000, 1300000); | |
1368 | case MMC_SIGNAL_VOLTAGE_180: | |
1369 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1370 | 1700000, 1800000, 1950000); | |
1371 | case MMC_SIGNAL_VOLTAGE_330: | |
1372 | ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV); | |
1373 | if (ret < 0) | |
1374 | return ret; | |
1375 | ||
1376 | dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n", | |
1377 | __func__, volt, max_uV); | |
1378 | ||
1379 | min_uV = max(volt - 300000, 2700000); | |
1380 | max_uV = min(max_uV + 200000, 3600000); | |
1381 | ||
1382 | /* | |
1383 | * Due to a limitation in the current implementation of | |
1384 | * regulator_set_voltage_triplet() which is taking the lowest | |
1385 | * voltage possible if below the target, search for a suitable | |
1386 | * voltage in two steps and try to stay close to vmmc | |
1387 | * with a 0.3V tolerance at first. | |
1388 | */ | |
1389 | if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1390 | min_uV, volt, max_uV)) | |
1391 | return 0; | |
1392 | ||
1393 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1394 | 2700000, volt, 3600000); | |
1395 | default: | |
1396 | return -EINVAL; | |
1397 | } | |
1398 | } | |
1399 | EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); | |
1400 | ||
4d1f52f9 TK |
1401 | #endif /* CONFIG_REGULATOR */ |
1402 | ||
e137788d GL |
1403 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1404 | { | |
1405 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1406 | int ret; |
1407 | ||
4d1f52f9 | 1408 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1409 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1410 | |
4d1f52f9 TK |
1411 | if (IS_ERR(mmc->supply.vmmc)) { |
1412 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1413 | return -EPROBE_DEFER; | |
6e1bbc51 | 1414 | dev_dbg(dev, "No vmmc regulator found\n"); |
4d1f52f9 TK |
1415 | } else { |
1416 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1417 | if (ret > 0) | |
1418 | mmc->ocr_avail = ret; | |
1419 | else | |
1420 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1421 | } | |
e137788d | 1422 | |
4d1f52f9 TK |
1423 | if (IS_ERR(mmc->supply.vqmmc)) { |
1424 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1425 | return -EPROBE_DEFER; | |
6e1bbc51 | 1426 | dev_dbg(dev, "No vqmmc regulator found\n"); |
4d1f52f9 | 1427 | } |
e137788d GL |
1428 | |
1429 | return 0; | |
1430 | } | |
1431 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1432 | ||
1da177e4 LT |
1433 | /* |
1434 | * Mask off any voltages we don't support and select | |
1435 | * the lowest voltage | |
1436 | */ | |
7ea239d9 | 1437 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1438 | { |
1439 | int bit; | |
1440 | ||
726d6f23 UH |
1441 | /* |
1442 | * Sanity check the voltages that the card claims to | |
1443 | * support. | |
1444 | */ | |
1445 | if (ocr & 0x7F) { | |
1446 | dev_warn(mmc_dev(host), | |
1447 | "card claims to support voltages below defined range\n"); | |
1448 | ocr &= ~0x7F; | |
1449 | } | |
1450 | ||
1da177e4 | 1451 | ocr &= host->ocr_avail; |
ce69d37b UH |
1452 | if (!ocr) { |
1453 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1454 | return 0; | |
1455 | } | |
1da177e4 | 1456 | |
ce69d37b UH |
1457 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1458 | bit = ffs(ocr) - 1; | |
63ef731a | 1459 | ocr &= 3 << bit; |
ce69d37b | 1460 | mmc_power_cycle(host, ocr); |
1da177e4 | 1461 | } else { |
ce69d37b UH |
1462 | bit = fls(ocr) - 1; |
1463 | ocr &= 3 << bit; | |
1464 | if (bit != host->ios.vdd) | |
1465 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1466 | } |
1467 | ||
1468 | return ocr; | |
1469 | } | |
1470 | ||
4e74b6b3 | 1471 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
567c8903 JR |
1472 | { |
1473 | int err = 0; | |
1474 | int old_signal_voltage = host->ios.signal_voltage; | |
1475 | ||
1476 | host->ios.signal_voltage = signal_voltage; | |
9eadcc05 | 1477 | if (host->ops->start_signal_voltage_switch) |
567c8903 | 1478 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
567c8903 JR |
1479 | |
1480 | if (err) | |
1481 | host->ios.signal_voltage = old_signal_voltage; | |
1482 | ||
1483 | return err; | |
1484 | ||
1485 | } | |
1486 | ||
2ed573b6 | 1487 | int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) |
f2119df6 | 1488 | { |
c7836d15 | 1489 | struct mmc_command cmd = {}; |
f2119df6 | 1490 | int err = 0; |
0797e5f1 | 1491 | u32 clock; |
f2119df6 | 1492 | |
0797e5f1 JR |
1493 | /* |
1494 | * If we cannot switch voltages, return failure so the caller | |
1495 | * can continue without UHS mode | |
1496 | */ | |
1497 | if (!host->ops->start_signal_voltage_switch) | |
1498 | return -EPERM; | |
1499 | if (!host->ops->card_busy) | |
6606110d JP |
1500 | pr_warn("%s: cannot verify signal voltage switch\n", |
1501 | mmc_hostname(host)); | |
0797e5f1 JR |
1502 | |
1503 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1504 | cmd.arg = 0; | |
1505 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1506 | ||
1507 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1508 | if (err) | |
9eadcc05 UH |
1509 | return err; |
1510 | ||
1511 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1512 | return -EIO; | |
0797e5f1 | 1513 | |
0797e5f1 JR |
1514 | /* |
1515 | * The card should drive cmd and dat[0:3] low immediately | |
1516 | * after the response of cmd11, but wait 1 ms to be sure | |
1517 | */ | |
1518 | mmc_delay(1); | |
1519 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1520 | err = -EAGAIN; | |
1521 | goto power_cycle; | |
1522 | } | |
1523 | /* | |
1524 | * During a signal voltage level switch, the clock must be gated | |
1525 | * for 5 ms according to the SD spec | |
1526 | */ | |
1527 | clock = host->ios.clock; | |
1528 | host->ios.clock = 0; | |
1529 | mmc_set_ios(host); | |
f2119df6 | 1530 | |
4e74b6b3 | 1531 | if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) { |
0797e5f1 JR |
1532 | /* |
1533 | * Voltages may not have been switched, but we've already | |
1534 | * sent CMD11, so a power cycle is required anyway | |
1535 | */ | |
1536 | err = -EAGAIN; | |
1537 | goto power_cycle; | |
f2119df6 AN |
1538 | } |
1539 | ||
7c5209c3 DA |
1540 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
1541 | mmc_delay(10); | |
0797e5f1 JR |
1542 | host->ios.clock = clock; |
1543 | mmc_set_ios(host); | |
1544 | ||
1545 | /* Wait for at least 1 ms according to spec */ | |
1546 | mmc_delay(1); | |
1547 | ||
1548 | /* | |
1549 | * Failure to switch is indicated by the card holding | |
1550 | * dat[0:3] low | |
1551 | */ | |
1552 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1553 | err = -EAGAIN; | |
1554 | ||
1555 | power_cycle: | |
1556 | if (err) { | |
1557 | pr_debug("%s: Signal voltage switch failed, " | |
1558 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1559 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1560 | } |
1561 | ||
0797e5f1 | 1562 | return err; |
f2119df6 AN |
1563 | } |
1564 | ||
b57c43ad | 1565 | /* |
7ea239d9 | 1566 | * Select timing parameters for host. |
b57c43ad | 1567 | */ |
7ea239d9 | 1568 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1569 | { |
7ea239d9 PO |
1570 | host->ios.timing = timing; |
1571 | mmc_set_ios(host); | |
b57c43ad PO |
1572 | } |
1573 | ||
d6d50a15 AN |
1574 | /* |
1575 | * Select appropriate driver type for host. | |
1576 | */ | |
1577 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1578 | { | |
1579 | host->ios.drv_type = drv_type; | |
1580 | mmc_set_ios(host); | |
1581 | } | |
1582 | ||
e23350b3 AH |
1583 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1584 | int card_drv_type, int *drv_type) | |
1585 | { | |
1586 | struct mmc_host *host = card->host; | |
1587 | int host_drv_type = SD_DRIVER_TYPE_B; | |
e23350b3 AH |
1588 | |
1589 | *drv_type = 0; | |
1590 | ||
1591 | if (!host->ops->select_drive_strength) | |
1592 | return 0; | |
1593 | ||
1594 | /* Use SD definition of driver strength for hosts */ | |
1595 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1596 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1597 | ||
1598 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1599 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1600 | ||
1601 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1602 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1603 | ||
1604 | /* | |
1605 | * The drive strength that the hardware can support | |
1606 | * depends on the board design. Pass the appropriate | |
1607 | * information and let the hardware specific code | |
1608 | * return what is possible given the options | |
1609 | */ | |
9eadcc05 UH |
1610 | return host->ops->select_drive_strength(card, max_dtr, |
1611 | host_drv_type, | |
1612 | card_drv_type, | |
1613 | drv_type); | |
e23350b3 AH |
1614 | } |
1615 | ||
1da177e4 | 1616 | /* |
45f8245b RK |
1617 | * Apply power to the MMC stack. This is a two-stage process. |
1618 | * First, we enable power to the card without the clock running. | |
1619 | * We then wait a bit for the power to stabilise. Finally, | |
1620 | * enable the bus drivers and clock to the card. | |
1621 | * | |
1622 | * We must _NOT_ enable the clock prior to power stablising. | |
1623 | * | |
1624 | * If a host does all the power sequencing itself, ignore the | |
1625 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1626 | */ |
4a065193 | 1627 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1628 | { |
fa550189 UH |
1629 | if (host->ios.power_mode == MMC_POWER_ON) |
1630 | return; | |
1631 | ||
3aa8793f UH |
1632 | mmc_pwrseq_pre_power_on(host); |
1633 | ||
4a065193 | 1634 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1635 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1636 | /* Set initial state and call mmc_set_ios */ |
1637 | mmc_set_initial_state(host); | |
1da177e4 | 1638 | |
ceae98f2 | 1639 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
4e74b6b3 | 1640 | if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) |
ceae98f2 | 1641 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); |
4e74b6b3 | 1642 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) |
ceae98f2 | 1643 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); |
4e74b6b3 | 1644 | else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) |
ceae98f2 | 1645 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); |
108ecc4c | 1646 | |
f9996aee PO |
1647 | /* |
1648 | * This delay should be sufficient to allow the power supply | |
1649 | * to reach the minimum voltage. | |
1650 | */ | |
79bccc5a | 1651 | mmc_delay(10); |
1da177e4 | 1652 | |
4febb7e2 UH |
1653 | mmc_pwrseq_post_power_on(host); |
1654 | ||
88ae8b86 | 1655 | host->ios.clock = host->f_init; |
8dfd0374 | 1656 | |
1da177e4 | 1657 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1658 | mmc_set_ios(host); |
1da177e4 | 1659 | |
f9996aee PO |
1660 | /* |
1661 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1662 | * time required to reach a stable voltage. | |
1663 | */ | |
79bccc5a | 1664 | mmc_delay(10); |
1da177e4 LT |
1665 | } |
1666 | ||
7f7e4129 | 1667 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1668 | { |
fa550189 UH |
1669 | if (host->ios.power_mode == MMC_POWER_OFF) |
1670 | return; | |
1671 | ||
3aa8793f UH |
1672 | mmc_pwrseq_power_off(host); |
1673 | ||
1da177e4 LT |
1674 | host->ios.clock = 0; |
1675 | host->ios.vdd = 0; | |
b33d46c3 | 1676 | |
1da177e4 | 1677 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1678 | /* Set initial state and call mmc_set_ios */ |
1679 | mmc_set_initial_state(host); | |
778e277c | 1680 | |
041beb1d DD |
1681 | /* |
1682 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1683 | * XO-1.5, require a short delay after poweroff before the card | |
1684 | * can be successfully turned on again. | |
1685 | */ | |
1686 | mmc_delay(1); | |
1da177e4 LT |
1687 | } |
1688 | ||
4a065193 | 1689 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1690 | { |
1691 | mmc_power_off(host); | |
1692 | /* Wait at least 1 ms according to SD spec */ | |
1693 | mmc_delay(1); | |
4a065193 | 1694 | mmc_power_up(host, ocr); |
276e090f JR |
1695 | } |
1696 | ||
39361851 AB |
1697 | /* |
1698 | * Cleanup when the last reference to the bus operator is dropped. | |
1699 | */ | |
261172fd | 1700 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 | 1701 | { |
6ff897ff | 1702 | WARN_ON(!host->bus_dead); |
39361851 AB |
1703 | |
1704 | host->bus_ops = NULL; | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * Increase reference count of bus operator | |
1709 | */ | |
1710 | static inline void mmc_bus_get(struct mmc_host *host) | |
1711 | { | |
1712 | unsigned long flags; | |
1713 | ||
1714 | spin_lock_irqsave(&host->lock, flags); | |
1715 | host->bus_refs++; | |
1716 | spin_unlock_irqrestore(&host->lock, flags); | |
1717 | } | |
1718 | ||
1719 | /* | |
1720 | * Decrease reference count of bus operator and free it if | |
1721 | * it is the last reference. | |
1722 | */ | |
1723 | static inline void mmc_bus_put(struct mmc_host *host) | |
1724 | { | |
1725 | unsigned long flags; | |
1726 | ||
1727 | spin_lock_irqsave(&host->lock, flags); | |
1728 | host->bus_refs--; | |
1729 | if ((host->bus_refs == 0) && host->bus_ops) | |
1730 | __mmc_release_bus(host); | |
1731 | spin_unlock_irqrestore(&host->lock, flags); | |
1732 | } | |
1733 | ||
1da177e4 | 1734 | /* |
7ea239d9 PO |
1735 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1736 | * host at any given time. | |
1da177e4 | 1737 | */ |
7ea239d9 | 1738 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1739 | { |
7ea239d9 | 1740 | unsigned long flags; |
e45a1bd2 | 1741 | |
d84075c8 | 1742 | WARN_ON(!host->claimed); |
bce40a36 | 1743 | |
7ea239d9 | 1744 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1745 | |
6ff897ff SL |
1746 | WARN_ON(host->bus_ops); |
1747 | WARN_ON(host->bus_refs); | |
b57c43ad | 1748 | |
7ea239d9 PO |
1749 | host->bus_ops = ops; |
1750 | host->bus_refs = 1; | |
1751 | host->bus_dead = 0; | |
b57c43ad | 1752 | |
7ea239d9 | 1753 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1754 | } |
1755 | ||
7ea239d9 | 1756 | /* |
7f7e4129 | 1757 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1758 | */ |
1759 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1760 | { |
7ea239d9 | 1761 | unsigned long flags; |
7ccd266e | 1762 | |
d84075c8 PO |
1763 | WARN_ON(!host->claimed); |
1764 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1765 | |
7ea239d9 | 1766 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1767 | |
7ea239d9 | 1768 | host->bus_dead = 1; |
7ccd266e | 1769 | |
7ea239d9 | 1770 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1771 | |
7ea239d9 | 1772 | mmc_bus_put(host); |
1da177e4 LT |
1773 | } |
1774 | ||
bbd43682 UH |
1775 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1776 | bool cd_irq) | |
1777 | { | |
bbd43682 UH |
1778 | /* |
1779 | * If the device is configured as wakeup, we prevent a new sleep for | |
1780 | * 5 s to give provision for user space to consume the event. | |
1781 | */ | |
1782 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1783 | device_can_wakeup(mmc_dev(host))) | |
1784 | pm_wakeup_event(mmc_dev(host), 5000); | |
1785 | ||
1786 | host->detect_change = 1; | |
1787 | mmc_schedule_delayed_work(&host->detect, delay); | |
1788 | } | |
1789 | ||
1da177e4 LT |
1790 | /** |
1791 | * mmc_detect_change - process change of state on a MMC socket | |
1792 | * @host: host which changed state. | |
8dc00335 | 1793 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1794 | * |
67a61c48 PO |
1795 | * MMC drivers should call this when they detect a card has been |
1796 | * inserted or removed. The MMC layer will confirm that any | |
1797 | * present card is still functional, and initialize any newly | |
1798 | * inserted. | |
1da177e4 | 1799 | */ |
8dc00335 | 1800 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1801 | { |
bbd43682 | 1802 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1803 | } |
1da177e4 LT |
1804 | EXPORT_SYMBOL(mmc_detect_change); |
1805 | ||
dfe86cba AH |
1806 | void mmc_init_erase(struct mmc_card *card) |
1807 | { | |
1808 | unsigned int sz; | |
1809 | ||
1810 | if (is_power_of_2(card->erase_size)) | |
1811 | card->erase_shift = ffs(card->erase_size) - 1; | |
1812 | else | |
1813 | card->erase_shift = 0; | |
1814 | ||
1815 | /* | |
1816 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1817 | * card. That is not desirable because it can take a long time | |
1818 | * (minutes) potentially delaying more important I/O, and also the | |
1819 | * timeout calculations become increasingly hugely over-estimated. | |
1820 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1821 | * to that size and alignment. | |
1822 | * | |
1823 | * For SD cards that define Allocation Unit size, limit erases to one | |
c6d8fd61 GG |
1824 | * Allocation Unit at a time. |
1825 | * For MMC, have a stab at ai good value and for modern cards it will | |
1826 | * end up being 4MiB. Note that if the value is too small, it can end | |
1827 | * up taking longer to erase. Also note, erase_size is already set to | |
1828 | * High Capacity Erase Size if available when this function is called. | |
dfe86cba AH |
1829 | */ |
1830 | if (mmc_card_sd(card) && card->ssr.au) { | |
1831 | card->pref_erase = card->ssr.au; | |
1832 | card->erase_shift = ffs(card->ssr.au) - 1; | |
cc8aa7de | 1833 | } else if (card->erase_size) { |
dfe86cba AH |
1834 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1835 | if (sz < 128) | |
1836 | card->pref_erase = 512 * 1024 / 512; | |
1837 | else if (sz < 512) | |
1838 | card->pref_erase = 1024 * 1024 / 512; | |
1839 | else if (sz < 1024) | |
1840 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1841 | else | |
1842 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1843 | if (card->pref_erase < card->erase_size) | |
1844 | card->pref_erase = card->erase_size; | |
1845 | else { | |
1846 | sz = card->pref_erase % card->erase_size; | |
1847 | if (sz) | |
1848 | card->pref_erase += card->erase_size - sz; | |
1849 | } | |
cc8aa7de CD |
1850 | } else |
1851 | card->pref_erase = 0; | |
dfe86cba AH |
1852 | } |
1853 | ||
eaa02f75 AW |
1854 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1855 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1856 | { |
1857 | unsigned int erase_timeout; | |
1858 | ||
7194efb8 AH |
1859 | if (arg == MMC_DISCARD_ARG || |
1860 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1861 | erase_timeout = card->ext_csd.trim_timeout; | |
1862 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1863 | /* High Capacity Erase Group Size uses HC timeouts */ |
1864 | if (arg == MMC_TRIM_ARG) | |
1865 | erase_timeout = card->ext_csd.trim_timeout; | |
1866 | else | |
1867 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1868 | } else { | |
1869 | /* CSD Erase Group Size uses write timeout */ | |
1870 | unsigned int mult = (10 << card->csd.r2w_factor); | |
4406ae21 | 1871 | unsigned int timeout_clks = card->csd.taac_clks * mult; |
dfe86cba AH |
1872 | unsigned int timeout_us; |
1873 | ||
4406ae21 SL |
1874 | /* Avoid overflow: e.g. taac_ns=80000000 mult=1280 */ |
1875 | if (card->csd.taac_ns < 1000000) | |
1876 | timeout_us = (card->csd.taac_ns * mult) / 1000; | |
dfe86cba | 1877 | else |
4406ae21 | 1878 | timeout_us = (card->csd.taac_ns / 1000) * mult; |
dfe86cba AH |
1879 | |
1880 | /* | |
1881 | * ios.clock is only a target. The real clock rate might be | |
1882 | * less but not that much less, so fudge it by multiplying by 2. | |
1883 | */ | |
1884 | timeout_clks <<= 1; | |
1885 | timeout_us += (timeout_clks * 1000) / | |
9eadcc05 | 1886 | (card->host->ios.clock / 1000); |
dfe86cba AH |
1887 | |
1888 | erase_timeout = timeout_us / 1000; | |
1889 | ||
1890 | /* | |
1891 | * Theoretically, the calculation could underflow so round up | |
1892 | * to 1ms in that case. | |
1893 | */ | |
1894 | if (!erase_timeout) | |
1895 | erase_timeout = 1; | |
1896 | } | |
1897 | ||
1898 | /* Multiplier for secure operations */ | |
1899 | if (arg & MMC_SECURE_ARGS) { | |
1900 | if (arg == MMC_SECURE_ERASE_ARG) | |
1901 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1902 | else | |
1903 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1904 | } | |
1905 | ||
1906 | erase_timeout *= qty; | |
1907 | ||
1908 | /* | |
1909 | * Ensure at least a 1 second timeout for SPI as per | |
1910 | * 'mmc_set_data_timeout()' | |
1911 | */ | |
1912 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
1913 | erase_timeout = 1000; | |
1914 | ||
eaa02f75 | 1915 | return erase_timeout; |
dfe86cba AH |
1916 | } |
1917 | ||
eaa02f75 AW |
1918 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
1919 | unsigned int arg, | |
1920 | unsigned int qty) | |
dfe86cba | 1921 | { |
eaa02f75 AW |
1922 | unsigned int erase_timeout; |
1923 | ||
dfe86cba AH |
1924 | if (card->ssr.erase_timeout) { |
1925 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
1926 | erase_timeout = card->ssr.erase_timeout * qty + |
1927 | card->ssr.erase_offset; | |
dfe86cba AH |
1928 | } else { |
1929 | /* | |
1930 | * Erase timeout not specified in SD Status Register (SSR) so | |
1931 | * use 250ms per write block. | |
1932 | */ | |
eaa02f75 | 1933 | erase_timeout = 250 * qty; |
dfe86cba AH |
1934 | } |
1935 | ||
1936 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
1937 | if (erase_timeout < 1000) |
1938 | erase_timeout = 1000; | |
1939 | ||
1940 | return erase_timeout; | |
dfe86cba AH |
1941 | } |
1942 | ||
eaa02f75 AW |
1943 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
1944 | unsigned int arg, | |
1945 | unsigned int qty) | |
dfe86cba AH |
1946 | { |
1947 | if (mmc_card_sd(card)) | |
eaa02f75 | 1948 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 1949 | else |
eaa02f75 | 1950 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1951 | } |
1952 | ||
1953 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
1954 | unsigned int to, unsigned int arg) | |
1955 | { | |
c7836d15 | 1956 | struct mmc_command cmd = {}; |
bb4eecf2 BW |
1957 | unsigned int qty = 0, busy_timeout = 0; |
1958 | bool use_r1b_resp = false; | |
8fee476b | 1959 | unsigned long timeout; |
dfe86cba AH |
1960 | int err; |
1961 | ||
8f11d106 AH |
1962 | mmc_retune_hold(card->host); |
1963 | ||
dfe86cba AH |
1964 | /* |
1965 | * qty is used to calculate the erase timeout which depends on how many | |
1966 | * erase groups (or allocation units in SD terminology) are affected. | |
1967 | * We count erasing part of an erase group as one erase group. | |
1968 | * For SD, the allocation units are always a power of 2. For MMC, the | |
1969 | * erase group size is almost certainly also power of 2, but it does not | |
1970 | * seem to insist on that in the JEDEC standard, so we fall back to | |
1971 | * division in that case. SD may not specify an allocation unit size, | |
1972 | * in which case the timeout is based on the number of write blocks. | |
1973 | * | |
1974 | * Note that the timeout for secure trim 2 will only be correct if the | |
1975 | * number of erase groups specified is the same as the total of all | |
1976 | * preceding secure trim 1 commands. Since the power may have been | |
1977 | * lost since the secure trim 1 commands occurred, it is generally | |
1978 | * impossible to calculate the secure trim 2 timeout correctly. | |
1979 | */ | |
1980 | if (card->erase_shift) | |
1981 | qty += ((to >> card->erase_shift) - | |
1982 | (from >> card->erase_shift)) + 1; | |
1983 | else if (mmc_card_sd(card)) | |
1984 | qty += to - from + 1; | |
1985 | else | |
1986 | qty += ((to / card->erase_size) - | |
1987 | (from / card->erase_size)) + 1; | |
1988 | ||
1989 | if (!mmc_card_blockaddr(card)) { | |
1990 | from <<= 9; | |
1991 | to <<= 9; | |
1992 | } | |
1993 | ||
dfe86cba AH |
1994 | if (mmc_card_sd(card)) |
1995 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
1996 | else | |
1997 | cmd.opcode = MMC_ERASE_GROUP_START; | |
1998 | cmd.arg = from; | |
1999 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2000 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2001 | if (err) { | |
a3c76eb9 | 2002 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 2003 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 2004 | err = -EIO; |
dfe86cba AH |
2005 | goto out; |
2006 | } | |
2007 | ||
2008 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2009 | if (mmc_card_sd(card)) | |
2010 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
2011 | else | |
2012 | cmd.opcode = MMC_ERASE_GROUP_END; | |
2013 | cmd.arg = to; | |
2014 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2015 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2016 | if (err) { | |
a3c76eb9 | 2017 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 2018 | err, cmd.resp[0]); |
67716327 | 2019 | err = -EIO; |
dfe86cba AH |
2020 | goto out; |
2021 | } | |
2022 | ||
2023 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2024 | cmd.opcode = MMC_ERASE; | |
2025 | cmd.arg = arg; | |
bb4eecf2 BW |
2026 | busy_timeout = mmc_erase_timeout(card, arg, qty); |
2027 | /* | |
2028 | * If the host controller supports busy signalling and the timeout for | |
2029 | * the erase operation does not exceed the max_busy_timeout, we should | |
2030 | * use R1B response. Or we need to prevent the host from doing hw busy | |
2031 | * detection, which is done by converting to a R1 response instead. | |
2032 | */ | |
2033 | if (card->host->max_busy_timeout && | |
2034 | busy_timeout > card->host->max_busy_timeout) { | |
2035 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2036 | } else { | |
2037 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
2038 | cmd.busy_timeout = busy_timeout; | |
2039 | use_r1b_resp = true; | |
2040 | } | |
2041 | ||
dfe86cba AH |
2042 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
2043 | if (err) { | |
a3c76eb9 | 2044 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
2045 | err, cmd.resp[0]); |
2046 | err = -EIO; | |
2047 | goto out; | |
2048 | } | |
2049 | ||
2050 | if (mmc_host_is_spi(card->host)) | |
2051 | goto out; | |
2052 | ||
bb4eecf2 BW |
2053 | /* |
2054 | * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling | |
2055 | * shall be avoided. | |
2056 | */ | |
2057 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) | |
2058 | goto out; | |
2059 | ||
2060 | timeout = jiffies + msecs_to_jiffies(busy_timeout); | |
dfe86cba AH |
2061 | do { |
2062 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2063 | cmd.opcode = MMC_SEND_STATUS; | |
2064 | cmd.arg = card->rca << 16; | |
2065 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
2066 | /* Do not retry else we can't see errors */ | |
2067 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2068 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 2069 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
2070 | err, cmd.resp[0]); |
2071 | err = -EIO; | |
2072 | goto out; | |
2073 | } | |
8fee476b TR |
2074 | |
2075 | /* Timeout if the device never becomes ready for data and | |
2076 | * never leaves the program state. | |
2077 | */ | |
2078 | if (time_after(jiffies, timeout)) { | |
2079 | pr_err("%s: Card stuck in programming state! %s\n", | |
2080 | mmc_hostname(card->host), __func__); | |
2081 | err = -EIO; | |
2082 | goto out; | |
2083 | } | |
2084 | ||
dfe86cba | 2085 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2086 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba | 2087 | out: |
8f11d106 | 2088 | mmc_retune_release(card->host); |
dfe86cba AH |
2089 | return err; |
2090 | } | |
2091 | ||
71085123 BW |
2092 | static unsigned int mmc_align_erase_size(struct mmc_card *card, |
2093 | unsigned int *from, | |
2094 | unsigned int *to, | |
2095 | unsigned int nr) | |
2096 | { | |
2097 | unsigned int from_new = *from, nr_new = nr, rem; | |
2098 | ||
6c689886 BW |
2099 | /* |
2100 | * When the 'card->erase_size' is power of 2, we can use round_up/down() | |
2101 | * to align the erase size efficiently. | |
2102 | */ | |
2103 | if (is_power_of_2(card->erase_size)) { | |
2104 | unsigned int temp = from_new; | |
2105 | ||
2106 | from_new = round_up(temp, card->erase_size); | |
2107 | rem = from_new - temp; | |
2108 | ||
71085123 BW |
2109 | if (nr_new > rem) |
2110 | nr_new -= rem; | |
2111 | else | |
2112 | return 0; | |
71085123 | 2113 | |
6c689886 BW |
2114 | nr_new = round_down(nr_new, card->erase_size); |
2115 | } else { | |
2116 | rem = from_new % card->erase_size; | |
2117 | if (rem) { | |
2118 | rem = card->erase_size - rem; | |
2119 | from_new += rem; | |
2120 | if (nr_new > rem) | |
2121 | nr_new -= rem; | |
2122 | else | |
2123 | return 0; | |
2124 | } | |
2125 | ||
2126 | rem = nr_new % card->erase_size; | |
2127 | if (rem) | |
2128 | nr_new -= rem; | |
2129 | } | |
71085123 BW |
2130 | |
2131 | if (nr_new == 0) | |
2132 | return 0; | |
2133 | ||
2134 | *to = from_new + nr_new; | |
2135 | *from = from_new; | |
2136 | ||
2137 | return nr_new; | |
2138 | } | |
2139 | ||
dfe86cba AH |
2140 | /** |
2141 | * mmc_erase - erase sectors. | |
2142 | * @card: card to erase | |
2143 | * @from: first sector to erase | |
2144 | * @nr: number of sectors to erase | |
2145 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2146 | * | |
2147 | * Caller must claim host before calling this function. | |
2148 | */ | |
2149 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2150 | unsigned int arg) | |
2151 | { | |
2152 | unsigned int rem, to = from + nr; | |
642c28ab | 2153 | int err; |
dfe86cba AH |
2154 | |
2155 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2156 | !(card->csd.cmdclass & CCC_ERASE)) | |
2157 | return -EOPNOTSUPP; | |
2158 | ||
2159 | if (!card->erase_size) | |
2160 | return -EOPNOTSUPP; | |
2161 | ||
2162 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2163 | return -EOPNOTSUPP; | |
2164 | ||
2165 | if ((arg & MMC_SECURE_ARGS) && | |
2166 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2167 | return -EOPNOTSUPP; | |
2168 | ||
2169 | if ((arg & MMC_TRIM_ARGS) && | |
2170 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2171 | return -EOPNOTSUPP; | |
2172 | ||
2173 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2174 | if (from % card->erase_size || nr % card->erase_size) | |
2175 | return -EINVAL; | |
2176 | } | |
2177 | ||
71085123 BW |
2178 | if (arg == MMC_ERASE_ARG) |
2179 | nr = mmc_align_erase_size(card, &from, &to, nr); | |
dfe86cba AH |
2180 | |
2181 | if (nr == 0) | |
2182 | return 0; | |
2183 | ||
dfe86cba AH |
2184 | if (to <= from) |
2185 | return -EINVAL; | |
2186 | ||
2187 | /* 'from' and 'to' are inclusive */ | |
2188 | to -= 1; | |
2189 | ||
642c28ab DJ |
2190 | /* |
2191 | * Special case where only one erase-group fits in the timeout budget: | |
2192 | * If the region crosses an erase-group boundary on this particular | |
2193 | * case, we will be trimming more than one erase-group which, does not | |
2194 | * fit in the timeout budget of the controller, so we need to split it | |
2195 | * and call mmc_do_erase() twice if necessary. This special case is | |
2196 | * identified by the card->eg_boundary flag. | |
2197 | */ | |
22d7e85f RG |
2198 | rem = card->erase_size - (from % card->erase_size); |
2199 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
2200 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
2201 | from += rem; | |
2202 | if ((err) || (to <= from)) | |
2203 | return err; | |
2204 | } | |
2205 | ||
dfe86cba AH |
2206 | return mmc_do_erase(card, from, to, arg); |
2207 | } | |
2208 | EXPORT_SYMBOL(mmc_erase); | |
2209 | ||
2210 | int mmc_can_erase(struct mmc_card *card) | |
2211 | { | |
2212 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2213 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2214 | return 1; | |
2215 | return 0; | |
2216 | } | |
2217 | EXPORT_SYMBOL(mmc_can_erase); | |
2218 | ||
2219 | int mmc_can_trim(struct mmc_card *card) | |
2220 | { | |
b5b4ff0a SL |
2221 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
2222 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
2223 | return 1; |
2224 | return 0; | |
2225 | } | |
2226 | EXPORT_SYMBOL(mmc_can_trim); | |
2227 | ||
b3bf9153 KP |
2228 | int mmc_can_discard(struct mmc_card *card) |
2229 | { | |
2230 | /* | |
2231 | * As there's no way to detect the discard support bit at v4.5 | |
2232 | * use the s/w feature support filed. | |
2233 | */ | |
2234 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2235 | return 1; | |
2236 | return 0; | |
2237 | } | |
2238 | EXPORT_SYMBOL(mmc_can_discard); | |
2239 | ||
d9ddd629 KP |
2240 | int mmc_can_sanitize(struct mmc_card *card) |
2241 | { | |
28302812 AH |
2242 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2243 | return 0; | |
d9ddd629 KP |
2244 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2245 | return 1; | |
2246 | return 0; | |
2247 | } | |
2248 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2249 | ||
dfe86cba AH |
2250 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2251 | { | |
5204d00f LC |
2252 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2253 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2254 | return 1; |
2255 | return 0; | |
2256 | } | |
2257 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2258 | ||
2259 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2260 | unsigned int nr) | |
2261 | { | |
2262 | if (!card->erase_size) | |
2263 | return 0; | |
2264 | if (from % card->erase_size || nr % card->erase_size) | |
2265 | return 0; | |
2266 | return 1; | |
2267 | } | |
2268 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2269 | |
e056a1b5 AH |
2270 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2271 | unsigned int arg) | |
2272 | { | |
2273 | struct mmc_host *host = card->host; | |
bb4eecf2 | 2274 | unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; |
e056a1b5 | 2275 | unsigned int last_timeout = 0; |
12182aff UH |
2276 | unsigned int max_busy_timeout = host->max_busy_timeout ? |
2277 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; | |
e056a1b5 | 2278 | |
bb4eecf2 | 2279 | if (card->erase_shift) { |
e056a1b5 | 2280 | max_qty = UINT_MAX >> card->erase_shift; |
bb4eecf2 BW |
2281 | min_qty = card->pref_erase >> card->erase_shift; |
2282 | } else if (mmc_card_sd(card)) { | |
e056a1b5 | 2283 | max_qty = UINT_MAX; |
bb4eecf2 BW |
2284 | min_qty = card->pref_erase; |
2285 | } else { | |
e056a1b5 | 2286 | max_qty = UINT_MAX / card->erase_size; |
bb4eecf2 BW |
2287 | min_qty = card->pref_erase / card->erase_size; |
2288 | } | |
e056a1b5 | 2289 | |
bb4eecf2 BW |
2290 | /* |
2291 | * We should not only use 'host->max_busy_timeout' as the limitation | |
2292 | * when deciding the max discard sectors. We should set a balance value | |
2293 | * to improve the erase speed, and it can not get too long timeout at | |
2294 | * the same time. | |
2295 | * | |
2296 | * Here we set 'card->pref_erase' as the minimal discard sectors no | |
2297 | * matter what size of 'host->max_busy_timeout', but if the | |
2298 | * 'host->max_busy_timeout' is large enough for more discard sectors, | |
2299 | * then we can continue to increase the max discard sectors until we | |
12182aff UH |
2300 | * get a balance value. In cases when the 'host->max_busy_timeout' |
2301 | * isn't specified, use the default max erase timeout. | |
bb4eecf2 | 2302 | */ |
e056a1b5 AH |
2303 | do { |
2304 | y = 0; | |
2305 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2306 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
bb4eecf2 | 2307 | |
12182aff | 2308 | if (qty + x > min_qty && timeout > max_busy_timeout) |
e056a1b5 | 2309 | break; |
bb4eecf2 | 2310 | |
e056a1b5 AH |
2311 | if (timeout < last_timeout) |
2312 | break; | |
2313 | last_timeout = timeout; | |
2314 | y = x; | |
2315 | } | |
2316 | qty += y; | |
2317 | } while (y); | |
2318 | ||
2319 | if (!qty) | |
2320 | return 0; | |
2321 | ||
642c28ab DJ |
2322 | /* |
2323 | * When specifying a sector range to trim, chances are we might cross | |
2324 | * an erase-group boundary even if the amount of sectors is less than | |
2325 | * one erase-group. | |
2326 | * If we can only fit one erase-group in the controller timeout budget, | |
2327 | * we have to care that erase-group boundaries are not crossed by a | |
2328 | * single trim operation. We flag that special case with "eg_boundary". | |
2329 | * In all other cases we can just decrement qty and pretend that we | |
2330 | * always touch (qty + 1) erase-groups as a simple optimization. | |
2331 | */ | |
e056a1b5 | 2332 | if (qty == 1) |
642c28ab DJ |
2333 | card->eg_boundary = 1; |
2334 | else | |
2335 | qty--; | |
e056a1b5 AH |
2336 | |
2337 | /* Convert qty to sectors */ | |
2338 | if (card->erase_shift) | |
642c28ab | 2339 | max_discard = qty << card->erase_shift; |
e056a1b5 | 2340 | else if (mmc_card_sd(card)) |
642c28ab | 2341 | max_discard = qty + 1; |
e056a1b5 | 2342 | else |
642c28ab | 2343 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
2344 | |
2345 | return max_discard; | |
2346 | } | |
2347 | ||
2348 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2349 | { | |
2350 | struct mmc_host *host = card->host; | |
2351 | unsigned int max_discard, max_trim; | |
2352 | ||
e056a1b5 AH |
2353 | /* |
2354 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2355 | * frequence which can change. In that case, the best choice is | |
2356 | * just the preferred erase size. | |
2357 | */ | |
2358 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2359 | return card->pref_erase; | |
2360 | ||
2361 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2362 | if (mmc_can_trim(card)) { | |
2363 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2364 | if (max_trim < max_discard) | |
2365 | max_discard = max_trim; | |
2366 | } else if (max_discard < card->erase_size) { | |
2367 | max_discard = 0; | |
2368 | } | |
2369 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
12182aff UH |
2370 | mmc_hostname(host), max_discard, host->max_busy_timeout ? |
2371 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); | |
e056a1b5 AH |
2372 | return max_discard; |
2373 | } | |
2374 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2375 | ||
33e6d74d UH |
2376 | bool mmc_card_is_blockaddr(struct mmc_card *card) |
2377 | { | |
2378 | return card ? mmc_card_blockaddr(card) : false; | |
2379 | } | |
2380 | EXPORT_SYMBOL(mmc_card_is_blockaddr); | |
2381 | ||
0f8d8ea6 AH |
2382 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2383 | { | |
c7836d15 | 2384 | struct mmc_command cmd = {}; |
0f8d8ea6 | 2385 | |
1712c937 ZX |
2386 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || |
2387 | mmc_card_hs400(card) || mmc_card_hs400es(card)) | |
0f8d8ea6 AH |
2388 | return 0; |
2389 | ||
0f8d8ea6 AH |
2390 | cmd.opcode = MMC_SET_BLOCKLEN; |
2391 | cmd.arg = blocklen; | |
2392 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2393 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2394 | } | |
2395 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2396 | ||
67c79db8 LP |
2397 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2398 | bool is_rel_write) | |
2399 | { | |
c7836d15 | 2400 | struct mmc_command cmd = {}; |
67c79db8 LP |
2401 | |
2402 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2403 | cmd.arg = blockcount & 0x0000FFFF; | |
2404 | if (is_rel_write) | |
2405 | cmd.arg |= 1 << 31; | |
2406 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2407 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2408 | } | |
2409 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2410 | ||
b2499518 AH |
2411 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2412 | { | |
52c8212d UH |
2413 | mmc_pwrseq_reset(host); |
2414 | ||
b2499518 AH |
2415 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
2416 | return; | |
b2499518 | 2417 | host->ops->hw_reset(host); |
b2499518 AH |
2418 | } |
2419 | ||
83533ab2 | 2420 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2421 | { |
f855a371 | 2422 | int ret; |
b2499518 | 2423 | |
f855a371 | 2424 | if (!host->card) |
b2499518 AH |
2425 | return -EINVAL; |
2426 | ||
f855a371 JR |
2427 | mmc_bus_get(host); |
2428 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { | |
2429 | mmc_bus_put(host); | |
b2499518 | 2430 | return -EOPNOTSUPP; |
b2499518 AH |
2431 | } |
2432 | ||
f855a371 JR |
2433 | ret = host->bus_ops->reset(host); |
2434 | mmc_bus_put(host); | |
b2499518 | 2435 | |
4e6c7178 GG |
2436 | if (ret) |
2437 | pr_warn("%s: tried to reset card, got error %d\n", | |
2438 | mmc_hostname(host), ret); | |
b2499518 | 2439 | |
f855a371 | 2440 | return ret; |
b2499518 | 2441 | } |
b2499518 AH |
2442 | EXPORT_SYMBOL(mmc_hw_reset); |
2443 | ||
807e8e40 AR |
2444 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2445 | { | |
2446 | host->f_init = freq; | |
2447 | ||
69f25f9b | 2448 | pr_debug("%s: %s: trying to init card at %u Hz\n", |
807e8e40 | 2449 | mmc_hostname(host), __func__, host->f_init); |
69f25f9b | 2450 | |
4a065193 | 2451 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2452 | |
b2499518 AH |
2453 | /* |
2454 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2455 | * do a hardware reset if possible. | |
2456 | */ | |
2457 | mmc_hw_reset_for_init(host); | |
2458 | ||
2f94e55a PR |
2459 | /* |
2460 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2461 | * if the card is being re-initialized, just send it. CMD52 | |
2462 | * should be ignored by SD/eMMC cards. | |
100a606d | 2463 | * Skip it if we already know that we do not support SDIO commands |
2f94e55a | 2464 | */ |
100a606d CC |
2465 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2466 | sdio_reset(host); | |
2467 | ||
807e8e40 AR |
2468 | mmc_go_idle(host); |
2469 | ||
1b8d79c5 UH |
2470 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2471 | mmc_send_if_cond(host, host->ocr_avail); | |
807e8e40 AR |
2472 | |
2473 | /* Order's important: probe SDIO, then SD, then MMC */ | |
100a606d CC |
2474 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
2475 | if (!mmc_attach_sdio(host)) | |
2476 | return 0; | |
2477 | ||
1b8d79c5 UH |
2478 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
2479 | if (!mmc_attach_sd(host)) | |
2480 | return 0; | |
2481 | ||
a0c3b68c SL |
2482 | if (!(host->caps2 & MMC_CAP2_NO_MMC)) |
2483 | if (!mmc_attach_mmc(host)) | |
2484 | return 0; | |
807e8e40 AR |
2485 | |
2486 | mmc_power_off(host); | |
2487 | return -EIO; | |
2488 | } | |
2489 | ||
d3049504 AH |
2490 | int _mmc_detect_card_removed(struct mmc_host *host) |
2491 | { | |
2492 | int ret; | |
2493 | ||
d3049504 AH |
2494 | if (!host->card || mmc_card_removed(host->card)) |
2495 | return 1; | |
2496 | ||
2497 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2498 | |
2499 | /* | |
2500 | * Card detect status and alive check may be out of sync if card is | |
2501 | * removed slowly, when card detect switch changes while card/slot | |
2502 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2503 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2504 | * detect work 200ms later for this case. | |
2505 | */ | |
2506 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2507 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2508 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2509 | } | |
2510 | ||
d3049504 AH |
2511 | if (ret) { |
2512 | mmc_card_set_removed(host->card); | |
2513 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2514 | } | |
2515 | ||
2516 | return ret; | |
2517 | } | |
2518 | ||
2519 | int mmc_detect_card_removed(struct mmc_host *host) | |
2520 | { | |
2521 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2522 | int ret; |
d3049504 AH |
2523 | |
2524 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2525 | |
2526 | if (!card) | |
2527 | return 1; | |
2528 | ||
6067bafe | 2529 | if (!mmc_card_is_removable(host)) |
1ff2575b UH |
2530 | return 0; |
2531 | ||
f0cc9cf9 | 2532 | ret = mmc_card_removed(card); |
d3049504 AH |
2533 | /* |
2534 | * The card will be considered unchanged unless we have been asked to | |
2535 | * detect a change or host requires polling to provide card detection. | |
2536 | */ | |
b6891679 | 2537 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2538 | return ret; |
d3049504 AH |
2539 | |
2540 | host->detect_change = 0; | |
f0cc9cf9 UH |
2541 | if (!ret) { |
2542 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2543 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2544 | /* |
2545 | * Schedule a detect work as soon as possible to let a | |
2546 | * rescan handle the card removal. | |
2547 | */ | |
2548 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2549 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2550 | } |
2551 | } | |
d3049504 | 2552 | |
f0cc9cf9 | 2553 | return ret; |
d3049504 AH |
2554 | } |
2555 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2556 | ||
b93931a6 | 2557 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2558 | { |
c4028958 DH |
2559 | struct mmc_host *host = |
2560 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2561 | int i; |
4c2ef25f | 2562 | |
807e8e40 | 2563 | if (host->rescan_disable) |
4c2ef25f | 2564 | return; |
1da177e4 | 2565 | |
3339d1e3 | 2566 | /* If there is a non-removable card registered, only scan once */ |
6067bafe | 2567 | if (!mmc_card_is_removable(host) && host->rescan_entered) |
3339d1e3 JR |
2568 | return; |
2569 | host->rescan_entered = 1; | |
2570 | ||
86236813 | 2571 | if (host->trigger_card_event && host->ops->card_event) { |
d234d212 | 2572 | mmc_claim_host(host); |
86236813 | 2573 | host->ops->card_event(host); |
d234d212 | 2574 | mmc_release_host(host); |
86236813 UH |
2575 | host->trigger_card_event = false; |
2576 | } | |
2577 | ||
7ea239d9 | 2578 | mmc_bus_get(host); |
b855885e | 2579 | |
30201e7f OBC |
2580 | /* |
2581 | * if there is a _removable_ card registered, check whether it is | |
2582 | * still present | |
2583 | */ | |
6067bafe | 2584 | if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host)) |
94d89efb JS |
2585 | host->bus_ops->detect(host); |
2586 | ||
d3049504 AH |
2587 | host->detect_change = 0; |
2588 | ||
c5841798 CB |
2589 | /* |
2590 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2591 | * the card is no longer present. | |
2592 | */ | |
94d89efb | 2593 | mmc_bus_put(host); |
94d89efb JS |
2594 | mmc_bus_get(host); |
2595 | ||
2596 | /* if there still is a card present, stop here */ | |
2597 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2598 | mmc_bus_put(host); |
94d89efb JS |
2599 | goto out; |
2600 | } | |
1da177e4 | 2601 | |
94d89efb JS |
2602 | /* |
2603 | * Only we can add a new handler, so it's safe to | |
2604 | * release the lock here. | |
2605 | */ | |
2606 | mmc_bus_put(host); | |
1da177e4 | 2607 | |
d234d212 | 2608 | mmc_claim_host(host); |
6067bafe | 2609 | if (mmc_card_is_removable(host) && host->ops->get_cd && |
c1b55bfc | 2610 | host->ops->get_cd(host) == 0) { |
fa550189 UH |
2611 | mmc_power_off(host); |
2612 | mmc_release_host(host); | |
94d89efb | 2613 | goto out; |
fa550189 | 2614 | } |
1da177e4 | 2615 | |
88ae8b86 | 2616 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2617 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2618 | break; | |
06b2233a | 2619 | if (freqs[i] <= host->f_min) |
807e8e40 | 2620 | break; |
88ae8b86 | 2621 | } |
807e8e40 AR |
2622 | mmc_release_host(host); |
2623 | ||
2624 | out: | |
28f52482 AV |
2625 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2626 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2627 | } |
2628 | ||
b93931a6 | 2629 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2630 | { |
fa550189 | 2631 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2632 | host->rescan_disable = 0; |
8af465db | 2633 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
8d1ffc8c | 2634 | |
c2c24819 UH |
2635 | if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) { |
2636 | mmc_claim_host(host); | |
4a065193 | 2637 | mmc_power_up(host, host->ocr_avail); |
c2c24819 UH |
2638 | mmc_release_host(host); |
2639 | } | |
8d1ffc8c | 2640 | |
740a221e | 2641 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2642 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2643 | } |
2644 | ||
b93931a6 | 2645 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2646 | { |
03dbaa04 AH |
2647 | if (host->slot.cd_irq >= 0) { |
2648 | if (host->slot.cd_wake_enabled) | |
2649 | disable_irq_wake(host->slot.cd_irq); | |
740a221e | 2650 | disable_irq(host->slot.cd_irq); |
03dbaa04 | 2651 | } |
3b91e550 | 2652 | |
d9adcc12 | 2653 | host->rescan_disable = 1; |
d9bcbf34 | 2654 | cancel_delayed_work_sync(&host->detect); |
3b91e550 | 2655 | |
da68c4eb NP |
2656 | /* clear pm flags now and let card drivers set them as needed */ |
2657 | host->pm_flags = 0; | |
2658 | ||
7ea239d9 PO |
2659 | mmc_bus_get(host); |
2660 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2661 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2662 | host->bus_ops->remove(host); |
7ea239d9 PO |
2663 | mmc_claim_host(host); |
2664 | mmc_detach_bus(host); | |
7f7e4129 | 2665 | mmc_power_off(host); |
7ea239d9 | 2666 | mmc_release_host(host); |
53509f0f DK |
2667 | mmc_bus_put(host); |
2668 | return; | |
1da177e4 | 2669 | } |
7ea239d9 PO |
2670 | mmc_bus_put(host); |
2671 | ||
8d1ffc8c | 2672 | mmc_claim_host(host); |
1da177e4 | 2673 | mmc_power_off(host); |
8d1ffc8c | 2674 | mmc_release_host(host); |
1da177e4 LT |
2675 | } |
2676 | ||
12ae637f | 2677 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2678 | { |
12ae637f OBC |
2679 | int ret = 0; |
2680 | ||
69f25f9b | 2681 | pr_debug("%s: %s: powering down\n", mmc_hostname(host), __func__); |
bb9cab94 | 2682 | |
eae1aeee AH |
2683 | mmc_bus_get(host); |
2684 | ||
5601aaf7 | 2685 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2686 | mmc_bus_put(host); |
12ae637f | 2687 | return -EINVAL; |
eae1aeee AH |
2688 | } |
2689 | ||
2690 | if (host->bus_ops->power_save) | |
12ae637f | 2691 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2692 | |
2693 | mmc_bus_put(host); | |
2694 | ||
2695 | mmc_power_off(host); | |
12ae637f OBC |
2696 | |
2697 | return ret; | |
eae1aeee AH |
2698 | } |
2699 | EXPORT_SYMBOL(mmc_power_save_host); | |
2700 | ||
12ae637f | 2701 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2702 | { |
12ae637f OBC |
2703 | int ret; |
2704 | ||
69f25f9b | 2705 | pr_debug("%s: %s: powering up\n", mmc_hostname(host), __func__); |
bb9cab94 | 2706 | |
eae1aeee AH |
2707 | mmc_bus_get(host); |
2708 | ||
5601aaf7 | 2709 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2710 | mmc_bus_put(host); |
12ae637f | 2711 | return -EINVAL; |
eae1aeee AH |
2712 | } |
2713 | ||
69041150 | 2714 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2715 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2716 | |
2717 | mmc_bus_put(host); | |
12ae637f OBC |
2718 | |
2719 | return ret; | |
eae1aeee AH |
2720 | } |
2721 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2722 | ||
8dede18e | 2723 | #ifdef CONFIG_PM_SLEEP |
4c2ef25f ML |
2724 | /* Do the card removal on suspend if card is assumed removeable |
2725 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2726 | to sync the card. | |
2727 | */ | |
8dede18e UH |
2728 | static int mmc_pm_notify(struct notifier_block *notify_block, |
2729 | unsigned long mode, void *unused) | |
4c2ef25f ML |
2730 | { |
2731 | struct mmc_host *host = container_of( | |
2732 | notify_block, struct mmc_host, pm_notify); | |
2733 | unsigned long flags; | |
810caddb | 2734 | int err = 0; |
4c2ef25f ML |
2735 | |
2736 | switch (mode) { | |
2737 | case PM_HIBERNATION_PREPARE: | |
2738 | case PM_SUSPEND_PREPARE: | |
184af16b | 2739 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2740 | spin_lock_irqsave(&host->lock, flags); |
2741 | host->rescan_disable = 1; | |
2742 | spin_unlock_irqrestore(&host->lock, flags); | |
2743 | cancel_delayed_work_sync(&host->detect); | |
2744 | ||
810caddb UH |
2745 | if (!host->bus_ops) |
2746 | break; | |
2747 | ||
2748 | /* Validate prerequisites for suspend */ | |
2749 | if (host->bus_ops->pre_suspend) | |
2750 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2751 | if (!err) |
4c2ef25f ML |
2752 | break; |
2753 | ||
0db13fc2 | 2754 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2755 | host->bus_ops->remove(host); |
0db13fc2 | 2756 | mmc_claim_host(host); |
4c2ef25f | 2757 | mmc_detach_bus(host); |
7f7e4129 | 2758 | mmc_power_off(host); |
4c2ef25f ML |
2759 | mmc_release_host(host); |
2760 | host->pm_flags = 0; | |
2761 | break; | |
2762 | ||
2763 | case PM_POST_SUSPEND: | |
2764 | case PM_POST_HIBERNATION: | |
274476f8 | 2765 | case PM_POST_RESTORE: |
4c2ef25f ML |
2766 | |
2767 | spin_lock_irqsave(&host->lock, flags); | |
2768 | host->rescan_disable = 0; | |
2769 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2770 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2771 | |
2772 | } | |
2773 | ||
2774 | return 0; | |
2775 | } | |
8dede18e UH |
2776 | |
2777 | void mmc_register_pm_notifier(struct mmc_host *host) | |
2778 | { | |
2779 | host->pm_notify.notifier_call = mmc_pm_notify; | |
2780 | register_pm_notifier(&host->pm_notify); | |
2781 | } | |
2782 | ||
2783 | void mmc_unregister_pm_notifier(struct mmc_host *host) | |
2784 | { | |
2785 | unregister_pm_notifier(&host->pm_notify); | |
2786 | } | |
1da177e4 LT |
2787 | #endif |
2788 | ||
2220eedf KD |
2789 | /** |
2790 | * mmc_init_context_info() - init synchronization context | |
2791 | * @host: mmc host | |
2792 | * | |
2793 | * Init struct context_info needed to implement asynchronous | |
2794 | * request mechanism, used by mmc core, host driver and mmc requests | |
2795 | * supplier. | |
2796 | */ | |
2797 | void mmc_init_context_info(struct mmc_host *host) | |
2798 | { | |
2220eedf KD |
2799 | host->context_info.is_new_req = false; |
2800 | host->context_info.is_done_rcv = false; | |
2801 | host->context_info.is_waiting_last_req = false; | |
2802 | init_waitqueue_head(&host->context_info.wait); | |
2803 | } | |
2804 | ||
ffce2e7e PO |
2805 | static int __init mmc_init(void) |
2806 | { | |
2807 | int ret; | |
2808 | ||
ffce2e7e | 2809 | ret = mmc_register_bus(); |
e29a7d73 | 2810 | if (ret) |
520bd7a8 | 2811 | return ret; |
e29a7d73 PO |
2812 | |
2813 | ret = mmc_register_host_class(); | |
2814 | if (ret) | |
2815 | goto unregister_bus; | |
2816 | ||
2817 | ret = sdio_register_bus(); | |
2818 | if (ret) | |
2819 | goto unregister_host_class; | |
2820 | ||
2821 | return 0; | |
2822 | ||
2823 | unregister_host_class: | |
2824 | mmc_unregister_host_class(); | |
2825 | unregister_bus: | |
2826 | mmc_unregister_bus(); | |
ffce2e7e PO |
2827 | return ret; |
2828 | } | |
2829 | ||
2830 | static void __exit mmc_exit(void) | |
2831 | { | |
e29a7d73 | 2832 | sdio_unregister_bus(); |
ffce2e7e PO |
2833 | mmc_unregister_host_class(); |
2834 | mmc_unregister_bus(); | |
ffce2e7e PO |
2835 | } |
2836 | ||
26074962 | 2837 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2838 | module_exit(mmc_exit); |
2839 | ||
1da177e4 | 2840 | MODULE_LICENSE("GPL"); |