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Commit | Line | Data |
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1da177e4 | 1 | /* |
aaac1b47 | 2 | * linux/drivers/mmc/core/core.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5b4fd9ae | 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
ad3868b2 | 6 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
bce40a36 | 7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/err.h> | |
af8350c7 | 21 | #include <linux/leds.h> |
b57c43ad | 22 | #include <linux/scatterlist.h> |
86e8286a | 23 | #include <linux/log2.h> |
5c13941a | 24 | #include <linux/regulator/consumer.h> |
e594573d | 25 | #include <linux/pm_runtime.h> |
bbd43682 | 26 | #include <linux/pm_wakeup.h> |
35eb6db1 | 27 | #include <linux/suspend.h> |
1b676f70 PF |
28 | #include <linux/fault-inject.h> |
29 | #include <linux/random.h> | |
950d56ac | 30 | #include <linux/slab.h> |
6e9e318b | 31 | #include <linux/of.h> |
1da177e4 LT |
32 | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/host.h> | |
da7fbe58 PO |
35 | #include <linux/mmc/mmc.h> |
36 | #include <linux/mmc/sd.h> | |
740a221e | 37 | #include <linux/mmc/slot-gpio.h> |
1da177e4 | 38 | |
aaac1b47 | 39 | #include "core.h" |
ffce2e7e PO |
40 | #include "bus.h" |
41 | #include "host.h" | |
e29a7d73 | 42 | #include "sdio_bus.h" |
3aa8793f | 43 | #include "pwrseq.h" |
da7fbe58 PO |
44 | |
45 | #include "mmc_ops.h" | |
46 | #include "sd_ops.h" | |
5c4e6f13 | 47 | #include "sdio_ops.h" |
1da177e4 | 48 | |
8fee476b TR |
49 | /* If the device is not responding */ |
50 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ | |
51 | ||
950d56ac JC |
52 | /* |
53 | * Background operations can take a long time, depending on the housekeeping | |
54 | * operations the card has to perform. | |
55 | */ | |
56 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ | |
57 | ||
ffce2e7e | 58 | static struct workqueue_struct *workqueue; |
fa550189 | 59 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 60 | |
af517150 DB |
61 | /* |
62 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
63 | * performance cost, and for other reasons may not always be desired. | |
64 | * So we allow it it to be disabled. | |
65 | */ | |
90ab5ee9 | 66 | bool use_spi_crc = 1; |
af517150 DB |
67 | module_param(use_spi_crc, bool, 0); |
68 | ||
ffce2e7e PO |
69 | /* |
70 | * Internal function. Schedule delayed work in the MMC work queue. | |
71 | */ | |
72 | static int mmc_schedule_delayed_work(struct delayed_work *work, | |
73 | unsigned long delay) | |
74 | { | |
75 | return queue_delayed_work(workqueue, work, delay); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Internal function. Flush all scheduled work from the MMC work queue. | |
80 | */ | |
81 | static void mmc_flush_scheduled_work(void) | |
82 | { | |
83 | flush_workqueue(workqueue); | |
84 | } | |
85 | ||
1b676f70 PF |
86 | #ifdef CONFIG_FAIL_MMC_REQUEST |
87 | ||
88 | /* | |
89 | * Internal function. Inject random data errors. | |
90 | * If mmc_data is NULL no errors are injected. | |
91 | */ | |
92 | static void mmc_should_fail_request(struct mmc_host *host, | |
93 | struct mmc_request *mrq) | |
94 | { | |
95 | struct mmc_command *cmd = mrq->cmd; | |
96 | struct mmc_data *data = mrq->data; | |
97 | static const int data_errors[] = { | |
98 | -ETIMEDOUT, | |
99 | -EILSEQ, | |
100 | -EIO, | |
101 | }; | |
102 | ||
103 | if (!data) | |
104 | return; | |
105 | ||
106 | if (cmd->error || data->error || | |
107 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) | |
108 | return; | |
109 | ||
2e744fcb AM |
110 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
111 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
112 | } |
113 | ||
114 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
115 | ||
116 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
117 | struct mmc_request *mrq) | |
118 | { | |
119 | } | |
120 | ||
121 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
122 | ||
1da177e4 | 123 | /** |
fe10c6ab RK |
124 | * mmc_request_done - finish processing an MMC request |
125 | * @host: MMC host which completed request | |
126 | * @mrq: MMC request which request | |
1da177e4 LT |
127 | * |
128 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 129 | * their processing of a request. |
1da177e4 LT |
130 | */ |
131 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
132 | { | |
133 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
134 | int err = cmd->error; |
135 | ||
bd11e8bd | 136 | /* Flag re-tuning needed on CRC errors */ |
031277d4 CJ |
137 | if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && |
138 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && | |
139 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || | |
bd11e8bd | 140 | (mrq->data && mrq->data->error == -EILSEQ) || |
031277d4 | 141 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
bd11e8bd AH |
142 | mmc_retune_needed(host); |
143 | ||
af517150 DB |
144 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
145 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
146 | cmd->retries = 0; | |
147 | } | |
148 | ||
d3049504 | 149 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
08a7e1df AH |
150 | /* |
151 | * Request starter must handle retries - see | |
152 | * mmc_wait_for_req_done(). | |
153 | */ | |
154 | if (mrq->done) | |
155 | mrq->done(mrq); | |
e4d21708 | 156 | } else { |
1b676f70 PF |
157 | mmc_should_fail_request(host, mrq); |
158 | ||
af8350c7 PO |
159 | led_trigger_event(host->led, LED_OFF); |
160 | ||
fc75b708 AG |
161 | if (mrq->sbc) { |
162 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
163 | mmc_hostname(host), mrq->sbc->opcode, | |
164 | mrq->sbc->error, | |
165 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
166 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
167 | } | |
168 | ||
e4d21708 PO |
169 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
170 | mmc_hostname(host), cmd->opcode, err, | |
171 | cmd->resp[0], cmd->resp[1], | |
172 | cmd->resp[2], cmd->resp[3]); | |
173 | ||
174 | if (mrq->data) { | |
175 | pr_debug("%s: %d bytes transferred: %d\n", | |
176 | mmc_hostname(host), | |
177 | mrq->data->bytes_xfered, mrq->data->error); | |
178 | } | |
179 | ||
180 | if (mrq->stop) { | |
181 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
182 | mmc_hostname(host), mrq->stop->opcode, | |
183 | mrq->stop->error, | |
184 | mrq->stop->resp[0], mrq->stop->resp[1], | |
185 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
186 | } | |
187 | ||
188 | if (mrq->done) | |
189 | mrq->done(mrq); | |
1da177e4 LT |
190 | } |
191 | } | |
192 | ||
193 | EXPORT_SYMBOL(mmc_request_done); | |
194 | ||
90a81489 AH |
195 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
196 | { | |
197 | int err; | |
198 | ||
199 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
200 | err = mmc_retune(host); | |
201 | if (err) { | |
202 | mrq->cmd->error = err; | |
203 | mmc_request_done(host, mrq); | |
204 | return; | |
205 | } | |
206 | ||
5d3f6ef0 HG |
207 | /* |
208 | * For sdio rw commands we must wait for card busy otherwise some | |
209 | * sdio devices won't work properly. | |
210 | */ | |
211 | if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) { | |
212 | int tries = 500; /* Wait aprox 500ms at maximum */ | |
213 | ||
214 | while (host->ops->card_busy(host) && --tries) | |
215 | mmc_delay(1); | |
216 | ||
217 | if (tries == 0) { | |
218 | mrq->cmd->error = -EBUSY; | |
219 | mmc_request_done(host, mrq); | |
220 | return; | |
221 | } | |
222 | } | |
223 | ||
90a81489 AH |
224 | host->ops->request(host, mrq); |
225 | } | |
226 | ||
f100c1c2 | 227 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
1da177e4 | 228 | { |
976d9276 PO |
229 | #ifdef CONFIG_MMC_DEBUG |
230 | unsigned int i, sz; | |
a84756c5 | 231 | struct scatterlist *sg; |
976d9276 | 232 | #endif |
90a81489 AH |
233 | mmc_retune_hold(host); |
234 | ||
f100c1c2 AH |
235 | if (mmc_card_removed(host->card)) |
236 | return -ENOMEDIUM; | |
976d9276 | 237 | |
7b2fd4f2 JC |
238 | if (mrq->sbc) { |
239 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
240 | mmc_hostname(host), mrq->sbc->opcode, | |
241 | mrq->sbc->arg, mrq->sbc->flags); | |
242 | } | |
243 | ||
920e70c5 RK |
244 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
245 | mmc_hostname(host), mrq->cmd->opcode, | |
246 | mrq->cmd->arg, mrq->cmd->flags); | |
1da177e4 | 247 | |
e4d21708 PO |
248 | if (mrq->data) { |
249 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
250 | "tsac %d ms nsac %d\n", | |
251 | mmc_hostname(host), mrq->data->blksz, | |
252 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 253 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
254 | mrq->data->timeout_clks); |
255 | } | |
256 | ||
257 | if (mrq->stop) { | |
258 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
259 | mmc_hostname(host), mrq->stop->opcode, | |
260 | mrq->stop->arg, mrq->stop->flags); | |
261 | } | |
262 | ||
f22ee4ed | 263 | WARN_ON(!host->claimed); |
1da177e4 LT |
264 | |
265 | mrq->cmd->error = 0; | |
266 | mrq->cmd->mrq = mrq; | |
cce411e6 AG |
267 | if (mrq->sbc) { |
268 | mrq->sbc->error = 0; | |
269 | mrq->sbc->mrq = mrq; | |
270 | } | |
1da177e4 | 271 | if (mrq->data) { |
fe4a3c7a | 272 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
55db890a PO |
273 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
274 | BUG_ON(mrq->data->blocks * mrq->data->blksz > | |
275 | host->max_req_size); | |
fe4a3c7a | 276 | |
976d9276 PO |
277 | #ifdef CONFIG_MMC_DEBUG |
278 | sz = 0; | |
a84756c5 PO |
279 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
280 | sz += sg->length; | |
976d9276 PO |
281 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
282 | #endif | |
283 | ||
1da177e4 LT |
284 | mrq->cmd->data = mrq->data; |
285 | mrq->data->error = 0; | |
286 | mrq->data->mrq = mrq; | |
287 | if (mrq->stop) { | |
288 | mrq->data->stop = mrq->stop; | |
289 | mrq->stop->error = 0; | |
290 | mrq->stop->mrq = mrq; | |
291 | } | |
292 | } | |
66c036e0 | 293 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 294 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
295 | |
296 | return 0; | |
1da177e4 LT |
297 | } |
298 | ||
950d56ac JC |
299 | /** |
300 | * mmc_start_bkops - start BKOPS for supported cards | |
301 | * @card: MMC card to start BKOPS | |
302 | * @form_exception: A flag to indicate if this function was | |
303 | * called due to an exception raised by the card | |
304 | * | |
305 | * Start background operations whenever requested. | |
306 | * When the urgent BKOPS bit is set in a R1 command response | |
307 | * then background operations should be started immediately. | |
308 | */ | |
309 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) | |
310 | { | |
311 | int err; | |
312 | int timeout; | |
313 | bool use_busy_signal; | |
314 | ||
315 | BUG_ON(!card); | |
316 | ||
0501be64 | 317 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
950d56ac JC |
318 | return; |
319 | ||
320 | err = mmc_read_bkops_status(card); | |
321 | if (err) { | |
322 | pr_err("%s: Failed to read bkops status: %d\n", | |
323 | mmc_hostname(card->host), err); | |
324 | return; | |
325 | } | |
326 | ||
327 | if (!card->ext_csd.raw_bkops_status) | |
328 | return; | |
329 | ||
330 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && | |
331 | from_exception) | |
332 | return; | |
333 | ||
334 | mmc_claim_host(card->host); | |
335 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { | |
336 | timeout = MMC_BKOPS_MAX_TIMEOUT; | |
337 | use_busy_signal = true; | |
338 | } else { | |
339 | timeout = 0; | |
340 | use_busy_signal = false; | |
341 | } | |
342 | ||
66073d86 AH |
343 | mmc_retune_hold(card->host); |
344 | ||
950d56ac | 345 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
4509f847 UH |
346 | EXT_CSD_BKOPS_START, 1, timeout, |
347 | use_busy_signal, true, false); | |
950d56ac JC |
348 | if (err) { |
349 | pr_warn("%s: Error %d starting bkops\n", | |
350 | mmc_hostname(card->host), err); | |
66073d86 | 351 | mmc_retune_release(card->host); |
950d56ac JC |
352 | goto out; |
353 | } | |
354 | ||
355 | /* | |
356 | * For urgent bkops status (LEVEL_2 and more) | |
357 | * bkops executed synchronously, otherwise | |
358 | * the operation is in progress | |
359 | */ | |
360 | if (!use_busy_signal) | |
361 | mmc_card_set_doing_bkops(card); | |
66073d86 AH |
362 | else |
363 | mmc_retune_release(card->host); | |
950d56ac JC |
364 | out: |
365 | mmc_release_host(card->host); | |
366 | } | |
367 | EXPORT_SYMBOL(mmc_start_bkops); | |
368 | ||
2220eedf KD |
369 | /* |
370 | * mmc_wait_data_done() - done callback for data request | |
371 | * @mrq: done data request | |
372 | * | |
373 | * Wakes up mmc context, passed as a callback to host controller driver | |
374 | */ | |
375 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
376 | { | |
71f8a4b8 JF |
377 | struct mmc_context_info *context_info = &mrq->host->context_info; |
378 | ||
379 | context_info->is_done_rcv = true; | |
380 | wake_up_interruptible(&context_info->wait); | |
2220eedf KD |
381 | } |
382 | ||
1da177e4 LT |
383 | static void mmc_wait_done(struct mmc_request *mrq) |
384 | { | |
aa8b683a PF |
385 | complete(&mrq->completion); |
386 | } | |
387 | ||
2220eedf KD |
388 | /* |
389 | *__mmc_start_data_req() - starts data request | |
390 | * @host: MMC host to start the request | |
391 | * @mrq: data request to start | |
392 | * | |
393 | * Sets the done callback to be called when request is completed by the card. | |
394 | * Starts data mmc request execution | |
395 | */ | |
396 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
397 | { | |
f100c1c2 AH |
398 | int err; |
399 | ||
2220eedf KD |
400 | mrq->done = mmc_wait_data_done; |
401 | mrq->host = host; | |
f100c1c2 AH |
402 | |
403 | err = mmc_start_request(host, mrq); | |
404 | if (err) { | |
405 | mrq->cmd->error = err; | |
9b844961 | 406 | mmc_wait_data_done(mrq); |
2220eedf | 407 | } |
2220eedf | 408 | |
f100c1c2 | 409 | return err; |
2220eedf KD |
410 | } |
411 | ||
956d9fd5 | 412 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 413 | { |
f100c1c2 AH |
414 | int err; |
415 | ||
aa8b683a PF |
416 | init_completion(&mrq->completion); |
417 | mrq->done = mmc_wait_done; | |
f100c1c2 AH |
418 | |
419 | err = mmc_start_request(host, mrq); | |
420 | if (err) { | |
421 | mrq->cmd->error = err; | |
d3049504 | 422 | complete(&mrq->completion); |
d3049504 | 423 | } |
f100c1c2 AH |
424 | |
425 | return err; | |
aa8b683a PF |
426 | } |
427 | ||
2220eedf KD |
428 | /* |
429 | * mmc_wait_for_data_req_done() - wait for request completed | |
430 | * @host: MMC host to prepare the command. | |
431 | * @mrq: MMC request to wait for | |
432 | * | |
433 | * Blocks MMC context till host controller will ack end of data request | |
434 | * execution or new request notification arrives from the block layer. | |
435 | * Handles command retries. | |
436 | * | |
437 | * Returns enum mmc_blk_status after checking errors. | |
438 | */ | |
439 | static int mmc_wait_for_data_req_done(struct mmc_host *host, | |
440 | struct mmc_request *mrq, | |
441 | struct mmc_async_req *next_req) | |
442 | { | |
443 | struct mmc_command *cmd; | |
444 | struct mmc_context_info *context_info = &host->context_info; | |
445 | int err; | |
446 | unsigned long flags; | |
447 | ||
448 | while (1) { | |
449 | wait_event_interruptible(context_info->wait, | |
450 | (context_info->is_done_rcv || | |
451 | context_info->is_new_req)); | |
452 | spin_lock_irqsave(&context_info->lock, flags); | |
453 | context_info->is_waiting_last_req = false; | |
454 | spin_unlock_irqrestore(&context_info->lock, flags); | |
455 | if (context_info->is_done_rcv) { | |
456 | context_info->is_done_rcv = false; | |
457 | context_info->is_new_req = false; | |
458 | cmd = mrq->cmd; | |
775a9362 | 459 | |
2220eedf KD |
460 | if (!cmd->error || !cmd->retries || |
461 | mmc_card_removed(host->card)) { | |
462 | err = host->areq->err_check(host->card, | |
463 | host->areq); | |
464 | break; /* return err */ | |
465 | } else { | |
90a81489 | 466 | mmc_retune_recheck(host); |
2220eedf KD |
467 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
468 | mmc_hostname(host), | |
469 | cmd->opcode, cmd->error); | |
470 | cmd->retries--; | |
471 | cmd->error = 0; | |
90a81489 | 472 | __mmc_start_request(host, mrq); |
2220eedf KD |
473 | continue; /* wait for done/new event again */ |
474 | } | |
475 | } else if (context_info->is_new_req) { | |
476 | context_info->is_new_req = false; | |
90a81489 AH |
477 | if (!next_req) |
478 | return MMC_BLK_NEW_REQUEST; | |
2220eedf KD |
479 | } |
480 | } | |
90a81489 | 481 | mmc_retune_release(host); |
2220eedf KD |
482 | return err; |
483 | } | |
484 | ||
aa8b683a PF |
485 | static void mmc_wait_for_req_done(struct mmc_host *host, |
486 | struct mmc_request *mrq) | |
487 | { | |
08a7e1df AH |
488 | struct mmc_command *cmd; |
489 | ||
490 | while (1) { | |
491 | wait_for_completion(&mrq->completion); | |
492 | ||
493 | cmd = mrq->cmd; | |
775a9362 ME |
494 | |
495 | /* | |
496 | * If host has timed out waiting for the sanitize | |
497 | * to complete, card might be still in programming state | |
498 | * so let's try to bring the card out of programming | |
499 | * state. | |
500 | */ | |
501 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
502 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
503 | pr_warn("%s: %s: Interrupted sanitize\n", |
504 | mmc_hostname(host), __func__); | |
775a9362 ME |
505 | cmd->error = 0; |
506 | break; | |
507 | } else { | |
508 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
509 | mmc_hostname(host), __func__); | |
510 | } | |
511 | } | |
d3049504 AH |
512 | if (!cmd->error || !cmd->retries || |
513 | mmc_card_removed(host->card)) | |
08a7e1df AH |
514 | break; |
515 | ||
90a81489 AH |
516 | mmc_retune_recheck(host); |
517 | ||
08a7e1df AH |
518 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
519 | mmc_hostname(host), cmd->opcode, cmd->error); | |
520 | cmd->retries--; | |
521 | cmd->error = 0; | |
90a81489 | 522 | __mmc_start_request(host, mrq); |
08a7e1df | 523 | } |
90a81489 AH |
524 | |
525 | mmc_retune_release(host); | |
aa8b683a PF |
526 | } |
527 | ||
528 | /** | |
529 | * mmc_pre_req - Prepare for a new request | |
530 | * @host: MMC host to prepare command | |
531 | * @mrq: MMC request to prepare for | |
532 | * @is_first_req: true if there is no previous started request | |
533 | * that may run in parellel to this call, otherwise false | |
534 | * | |
535 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
536 | * host prepare for the new request. Preparation of a request may be | |
537 | * performed while another request is running on the host. | |
538 | */ | |
539 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, | |
540 | bool is_first_req) | |
541 | { | |
9eadcc05 | 542 | if (host->ops->pre_req) |
aa8b683a PF |
543 | host->ops->pre_req(host, mrq, is_first_req); |
544 | } | |
545 | ||
546 | /** | |
547 | * mmc_post_req - Post process a completed request | |
548 | * @host: MMC host to post process command | |
549 | * @mrq: MMC request to post process for | |
550 | * @err: Error, if non zero, clean up any resources made in pre_req | |
551 | * | |
552 | * Let the host post process a completed request. Post processing of | |
553 | * a request may be performed while another reuqest is running. | |
554 | */ | |
555 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
556 | int err) | |
557 | { | |
9eadcc05 | 558 | if (host->ops->post_req) |
aa8b683a | 559 | host->ops->post_req(host, mrq, err); |
1da177e4 LT |
560 | } |
561 | ||
aa8b683a PF |
562 | /** |
563 | * mmc_start_req - start a non-blocking request | |
564 | * @host: MMC host to start command | |
565 | * @areq: async request to start | |
566 | * @error: out parameter returns 0 for success, otherwise non zero | |
567 | * | |
568 | * Start a new MMC custom command request for a host. | |
569 | * If there is on ongoing async request wait for completion | |
570 | * of that request and start the new one and return. | |
571 | * Does not wait for the new request to complete. | |
572 | * | |
573 | * Returns the completed request, NULL in case of none completed. | |
574 | * Wait for the an ongoing request (previoulsy started) to complete and | |
575 | * return the completed request. If there is no ongoing request, NULL | |
576 | * is returned without waiting. NULL is not an error condition. | |
577 | */ | |
578 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, | |
579 | struct mmc_async_req *areq, int *error) | |
580 | { | |
581 | int err = 0; | |
956d9fd5 | 582 | int start_err = 0; |
aa8b683a PF |
583 | struct mmc_async_req *data = host->areq; |
584 | ||
585 | /* Prepare a new request */ | |
586 | if (areq) | |
587 | mmc_pre_req(host, areq->mrq, !host->areq); | |
588 | ||
589 | if (host->areq) { | |
f5c2758f JC |
590 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
591 | if (err == MMC_BLK_NEW_REQUEST) { | |
592 | if (error) | |
593 | *error = err; | |
594 | /* | |
595 | * The previous request was not completed, | |
596 | * nothing to return | |
597 | */ | |
598 | return NULL; | |
599 | } | |
950d56ac JC |
600 | /* |
601 | * Check BKOPS urgency for each R1 response | |
602 | */ | |
603 | if (host->card && mmc_card_mmc(host->card) && | |
604 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
605 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
64b12a68 SK |
606 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
607 | ||
608 | /* Cancel the prepared request */ | |
609 | if (areq) | |
610 | mmc_post_req(host, areq->mrq, -EINVAL); | |
611 | ||
950d56ac | 612 | mmc_start_bkops(host->card, true); |
64b12a68 SK |
613 | |
614 | /* prepare the request again */ | |
615 | if (areq) | |
616 | mmc_pre_req(host, areq->mrq, !host->areq); | |
617 | } | |
aa8b683a PF |
618 | } |
619 | ||
956d9fd5 | 620 | if (!err && areq) |
2220eedf | 621 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a PF |
622 | |
623 | if (host->areq) | |
624 | mmc_post_req(host, host->areq->mrq, 0); | |
625 | ||
956d9fd5 UH |
626 | /* Cancel a prepared request if it was not started. */ |
627 | if ((err || start_err) && areq) | |
f5c2758f | 628 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 UH |
629 | |
630 | if (err) | |
631 | host->areq = NULL; | |
632 | else | |
633 | host->areq = areq; | |
634 | ||
aa8b683a PF |
635 | if (error) |
636 | *error = err; | |
637 | return data; | |
638 | } | |
639 | EXPORT_SYMBOL(mmc_start_req); | |
640 | ||
67a61c48 PO |
641 | /** |
642 | * mmc_wait_for_req - start a request and wait for completion | |
643 | * @host: MMC host to start command | |
644 | * @mrq: MMC request to start | |
645 | * | |
646 | * Start a new MMC custom command request for a host, and wait | |
647 | * for the command to complete. Does not attempt to parse the | |
648 | * response. | |
649 | */ | |
650 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 651 | { |
aa8b683a PF |
652 | __mmc_start_req(host, mrq); |
653 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 654 | } |
1da177e4 LT |
655 | EXPORT_SYMBOL(mmc_wait_for_req); |
656 | ||
eb0d8f13 JC |
657 | /** |
658 | * mmc_interrupt_hpi - Issue for High priority Interrupt | |
659 | * @card: the MMC card associated with the HPI transfer | |
660 | * | |
661 | * Issued High Priority Interrupt, and check for card status | |
950d56ac | 662 | * until out-of prg-state. |
eb0d8f13 JC |
663 | */ |
664 | int mmc_interrupt_hpi(struct mmc_card *card) | |
665 | { | |
666 | int err; | |
667 | u32 status; | |
6af9e96e | 668 | unsigned long prg_wait; |
eb0d8f13 JC |
669 | |
670 | BUG_ON(!card); | |
671 | ||
672 | if (!card->ext_csd.hpi_en) { | |
673 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); | |
674 | return 1; | |
675 | } | |
676 | ||
677 | mmc_claim_host(card->host); | |
678 | err = mmc_send_status(card, &status); | |
679 | if (err) { | |
680 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); | |
681 | goto out; | |
682 | } | |
683 | ||
6af9e96e V |
684 | switch (R1_CURRENT_STATE(status)) { |
685 | case R1_STATE_IDLE: | |
686 | case R1_STATE_READY: | |
687 | case R1_STATE_STBY: | |
211d4fe5 | 688 | case R1_STATE_TRAN: |
6af9e96e | 689 | /* |
211d4fe5 | 690 | * In idle and transfer states, HPI is not needed and the caller |
6af9e96e V |
691 | * can issue the next intended command immediately |
692 | */ | |
693 | goto out; | |
694 | case R1_STATE_PRG: | |
695 | break; | |
696 | default: | |
697 | /* In all other states, it's illegal to issue HPI */ | |
698 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", | |
699 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); | |
700 | err = -EINVAL; | |
701 | goto out; | |
702 | } | |
703 | ||
704 | err = mmc_send_hpi_cmd(card, &status); | |
705 | if (err) | |
706 | goto out; | |
707 | ||
708 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); | |
709 | do { | |
710 | err = mmc_send_status(card, &status); | |
711 | ||
712 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) | |
713 | break; | |
714 | if (time_after(jiffies, prg_wait)) | |
715 | err = -ETIMEDOUT; | |
716 | } while (!err); | |
eb0d8f13 JC |
717 | |
718 | out: | |
719 | mmc_release_host(card->host); | |
720 | return err; | |
721 | } | |
722 | EXPORT_SYMBOL(mmc_interrupt_hpi); | |
723 | ||
1da177e4 LT |
724 | /** |
725 | * mmc_wait_for_cmd - start a command and wait for completion | |
726 | * @host: MMC host to start command | |
727 | * @cmd: MMC command to start | |
728 | * @retries: maximum number of retries | |
729 | * | |
730 | * Start a new MMC command for a host, and wait for the command | |
731 | * to complete. Return any error that occurred while the command | |
732 | * was executing. Do not attempt to parse the response. | |
733 | */ | |
734 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
735 | { | |
ad5fd972 | 736 | struct mmc_request mrq = {NULL}; |
1da177e4 | 737 | |
d84075c8 | 738 | WARN_ON(!host->claimed); |
1da177e4 | 739 | |
1da177e4 LT |
740 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
741 | cmd->retries = retries; | |
742 | ||
743 | mrq.cmd = cmd; | |
744 | cmd->data = NULL; | |
745 | ||
746 | mmc_wait_for_req(host, &mrq); | |
747 | ||
748 | return cmd->error; | |
749 | } | |
750 | ||
751 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
752 | ||
950d56ac JC |
753 | /** |
754 | * mmc_stop_bkops - stop ongoing BKOPS | |
755 | * @card: MMC card to check BKOPS | |
756 | * | |
757 | * Send HPI command to stop ongoing background operations to | |
758 | * allow rapid servicing of foreground operations, e.g. read/ | |
759 | * writes. Wait until the card comes out of the programming state | |
760 | * to avoid errors in servicing read/write requests. | |
761 | */ | |
762 | int mmc_stop_bkops(struct mmc_card *card) | |
763 | { | |
764 | int err = 0; | |
765 | ||
766 | BUG_ON(!card); | |
767 | err = mmc_interrupt_hpi(card); | |
768 | ||
769 | /* | |
770 | * If err is EINVAL, we can't issue an HPI. | |
771 | * It should complete the BKOPS. | |
772 | */ | |
773 | if (!err || (err == -EINVAL)) { | |
774 | mmc_card_clr_doing_bkops(card); | |
66073d86 | 775 | mmc_retune_release(card->host); |
950d56ac JC |
776 | err = 0; |
777 | } | |
778 | ||
779 | return err; | |
780 | } | |
781 | EXPORT_SYMBOL(mmc_stop_bkops); | |
782 | ||
783 | int mmc_read_bkops_status(struct mmc_card *card) | |
784 | { | |
785 | int err; | |
786 | u8 *ext_csd; | |
787 | ||
950d56ac | 788 | mmc_claim_host(card->host); |
b2cada73 | 789 | err = mmc_get_ext_csd(card, &ext_csd); |
950d56ac JC |
790 | mmc_release_host(card->host); |
791 | if (err) | |
b2cada73 | 792 | return err; |
950d56ac JC |
793 | |
794 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; | |
795 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; | |
950d56ac | 796 | kfree(ext_csd); |
b2cada73 | 797 | return 0; |
950d56ac JC |
798 | } |
799 | EXPORT_SYMBOL(mmc_read_bkops_status); | |
800 | ||
d773d725 RK |
801 | /** |
802 | * mmc_set_data_timeout - set the timeout for a data command | |
803 | * @data: data phase for command | |
804 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
805 | * |
806 | * Computes the data timeout parameters according to the | |
807 | * correct algorithm given the card type. | |
d773d725 | 808 | */ |
b146d26a | 809 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
810 | { |
811 | unsigned int mult; | |
812 | ||
e6f918bf PO |
813 | /* |
814 | * SDIO cards only define an upper 1 s limit on access. | |
815 | */ | |
816 | if (mmc_card_sdio(card)) { | |
817 | data->timeout_ns = 1000000000; | |
818 | data->timeout_clks = 0; | |
819 | return; | |
820 | } | |
821 | ||
d773d725 RK |
822 | /* |
823 | * SD cards use a 100 multiplier rather than 10 | |
824 | */ | |
825 | mult = mmc_card_sd(card) ? 100 : 10; | |
826 | ||
827 | /* | |
828 | * Scale up the multiplier (and therefore the timeout) by | |
829 | * the r2w factor for writes. | |
830 | */ | |
b146d26a | 831 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
832 | mult <<= card->csd.r2w_factor; |
833 | ||
834 | data->timeout_ns = card->csd.tacc_ns * mult; | |
835 | data->timeout_clks = card->csd.tacc_clks * mult; | |
836 | ||
837 | /* | |
838 | * SD cards also have an upper limit on the timeout. | |
839 | */ | |
840 | if (mmc_card_sd(card)) { | |
841 | unsigned int timeout_us, limit_us; | |
842 | ||
843 | timeout_us = data->timeout_ns / 1000; | |
9eadcc05 | 844 | if (card->host->ios.clock) |
e9b86841 | 845 | timeout_us += data->timeout_clks * 1000 / |
9eadcc05 | 846 | (card->host->ios.clock / 1000); |
d773d725 | 847 | |
b146d26a | 848 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 849 | /* |
3bdc9ba8 PW |
850 | * The MMC spec "It is strongly recommended |
851 | * for hosts to implement more than 500ms | |
852 | * timeout value even if the card indicates | |
853 | * the 250ms maximum busy length." Even the | |
854 | * previous value of 300ms is known to be | |
855 | * insufficient for some cards. | |
493890e7 | 856 | */ |
3bdc9ba8 | 857 | limit_us = 3000000; |
d773d725 RK |
858 | else |
859 | limit_us = 100000; | |
860 | ||
fba68bd2 PL |
861 | /* |
862 | * SDHC cards always use these fixed values. | |
863 | */ | |
864 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
865 | data->timeout_ns = limit_us * 1000; |
866 | data->timeout_clks = 0; | |
867 | } | |
f7bf11a3 SW |
868 | |
869 | /* assign limit value if invalid */ | |
870 | if (timeout_us == 0) | |
871 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 872 | } |
6de5fc9c SNX |
873 | |
874 | /* | |
875 | * Some cards require longer data read timeout than indicated in CSD. | |
876 | * Address this by setting the read timeout to a "reasonably high" | |
877 | * value. For the cards tested, 300ms has proven enough. If necessary, | |
878 | * this value can be increased if other problematic cards require this. | |
879 | */ | |
880 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
881 | data->timeout_ns = 300000000; | |
882 | data->timeout_clks = 0; | |
883 | } | |
884 | ||
c0c88871 WM |
885 | /* |
886 | * Some cards need very high timeouts if driven in SPI mode. | |
887 | * The worst observed timeout was 900ms after writing a | |
888 | * continuous stream of data until the internal logic | |
889 | * overflowed. | |
890 | */ | |
891 | if (mmc_host_is_spi(card->host)) { | |
892 | if (data->flags & MMC_DATA_WRITE) { | |
893 | if (data->timeout_ns < 1000000000) | |
894 | data->timeout_ns = 1000000000; /* 1s */ | |
895 | } else { | |
896 | if (data->timeout_ns < 100000000) | |
897 | data->timeout_ns = 100000000; /* 100ms */ | |
898 | } | |
899 | } | |
d773d725 RK |
900 | } |
901 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
902 | ||
ad3868b2 PO |
903 | /** |
904 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
905 | * @card: the MMC card associated with the data transfer | |
906 | * @sz: original transfer size | |
907 | * | |
908 | * Pads the original data size with a number of extra bytes in | |
909 | * order to avoid controller bugs and/or performance hits | |
910 | * (e.g. some controllers revert to PIO for certain sizes). | |
911 | * | |
912 | * Returns the improved size, which might be unmodified. | |
913 | * | |
914 | * Note that this function is only relevant when issuing a | |
915 | * single scatter gather entry. | |
916 | */ | |
917 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
918 | { | |
919 | /* | |
920 | * FIXME: We don't have a system for the controller to tell | |
921 | * the core about its problems yet, so for now we just 32-bit | |
922 | * align the size. | |
923 | */ | |
924 | sz = ((sz + 3) / 4) * 4; | |
925 | ||
926 | return sz; | |
927 | } | |
928 | EXPORT_SYMBOL(mmc_align_data_size); | |
929 | ||
1da177e4 | 930 | /** |
2342f332 | 931 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 932 | * @host: mmc host to claim |
2342f332 | 933 | * @abort: whether or not the operation should be aborted |
1da177e4 | 934 | * |
2342f332 NP |
935 | * Claim a host for a set of operations. If @abort is non null and |
936 | * dereference a non-zero value then this will return prematurely with | |
937 | * that non-zero value without acquiring the lock. Returns zero | |
938 | * with the lock held otherwise. | |
1da177e4 | 939 | */ |
2342f332 | 940 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
941 | { |
942 | DECLARE_WAITQUEUE(wait, current); | |
943 | unsigned long flags; | |
2342f332 | 944 | int stop; |
9250aea7 | 945 | bool pm = false; |
1da177e4 | 946 | |
cf795bfb PO |
947 | might_sleep(); |
948 | ||
1da177e4 LT |
949 | add_wait_queue(&host->wq, &wait); |
950 | spin_lock_irqsave(&host->lock, flags); | |
951 | while (1) { | |
952 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 953 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 954 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
955 | break; |
956 | spin_unlock_irqrestore(&host->lock, flags); | |
957 | schedule(); | |
958 | spin_lock_irqsave(&host->lock, flags); | |
959 | } | |
960 | set_current_state(TASK_RUNNING); | |
319a3f14 | 961 | if (!stop) { |
2342f332 | 962 | host->claimed = 1; |
319a3f14 AH |
963 | host->claimer = current; |
964 | host->claim_cnt += 1; | |
9250aea7 UH |
965 | if (host->claim_cnt == 1) |
966 | pm = true; | |
319a3f14 | 967 | } else |
2342f332 | 968 | wake_up(&host->wq); |
1da177e4 LT |
969 | spin_unlock_irqrestore(&host->lock, flags); |
970 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
971 | |
972 | if (pm) | |
973 | pm_runtime_get_sync(mmc_dev(host)); | |
974 | ||
2342f332 | 975 | return stop; |
1da177e4 | 976 | } |
2342f332 | 977 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 978 | |
ab1efd27 | 979 | /** |
907d2e7c | 980 | * mmc_release_host - release a host |
ab1efd27 UH |
981 | * @host: mmc host to release |
982 | * | |
907d2e7c AH |
983 | * Release a MMC host, allowing others to claim the host |
984 | * for their operations. | |
ab1efd27 | 985 | */ |
907d2e7c | 986 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
987 | { |
988 | unsigned long flags; | |
989 | ||
907d2e7c AH |
990 | WARN_ON(!host->claimed); |
991 | ||
8ea926b2 | 992 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
993 | if (--host->claim_cnt) { |
994 | /* Release for nested claim */ | |
995 | spin_unlock_irqrestore(&host->lock, flags); | |
996 | } else { | |
997 | host->claimed = 0; | |
998 | host->claimer = NULL; | |
999 | spin_unlock_irqrestore(&host->lock, flags); | |
1000 | wake_up(&host->wq); | |
9250aea7 UH |
1001 | pm_runtime_mark_last_busy(mmc_dev(host)); |
1002 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 1003 | } |
8ea926b2 | 1004 | } |
1da177e4 LT |
1005 | EXPORT_SYMBOL(mmc_release_host); |
1006 | ||
e94cfef6 UH |
1007 | /* |
1008 | * This is a helper function, which fetches a runtime pm reference for the | |
1009 | * card device and also claims the host. | |
1010 | */ | |
1011 | void mmc_get_card(struct mmc_card *card) | |
1012 | { | |
1013 | pm_runtime_get_sync(&card->dev); | |
1014 | mmc_claim_host(card->host); | |
1015 | } | |
1016 | EXPORT_SYMBOL(mmc_get_card); | |
1017 | ||
1018 | /* | |
1019 | * This is a helper function, which releases the host and drops the runtime | |
1020 | * pm reference for the card device. | |
1021 | */ | |
1022 | void mmc_put_card(struct mmc_card *card) | |
1023 | { | |
1024 | mmc_release_host(card->host); | |
1025 | pm_runtime_mark_last_busy(&card->dev); | |
1026 | pm_runtime_put_autosuspend(&card->dev); | |
1027 | } | |
1028 | EXPORT_SYMBOL(mmc_put_card); | |
1029 | ||
7ea239d9 PO |
1030 | /* |
1031 | * Internal function that does the actual ios call to the host driver, | |
1032 | * optionally printing some debug output. | |
1033 | */ | |
920e70c5 RK |
1034 | static inline void mmc_set_ios(struct mmc_host *host) |
1035 | { | |
1036 | struct mmc_ios *ios = &host->ios; | |
1037 | ||
cd9277c0 PO |
1038 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
1039 | "width %u timing %u\n", | |
920e70c5 RK |
1040 | mmc_hostname(host), ios->clock, ios->bus_mode, |
1041 | ios->power_mode, ios->chip_select, ios->vdd, | |
cd9277c0 | 1042 | ios->bus_width, ios->timing); |
fba68bd2 | 1043 | |
920e70c5 RK |
1044 | host->ops->set_ios(host, ios); |
1045 | } | |
1046 | ||
7ea239d9 PO |
1047 | /* |
1048 | * Control chip select pin on a host. | |
1049 | */ | |
da7fbe58 | 1050 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 1051 | { |
da7fbe58 PO |
1052 | host->ios.chip_select = mode; |
1053 | mmc_set_ios(host); | |
1da177e4 LT |
1054 | } |
1055 | ||
7ea239d9 PO |
1056 | /* |
1057 | * Sets the host clock to the highest possible frequency that | |
1058 | * is below "hz". | |
1059 | */ | |
9eadcc05 | 1060 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 1061 | { |
6a98f1e8 | 1062 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
1063 | |
1064 | if (hz > host->f_max) | |
1065 | hz = host->f_max; | |
1066 | ||
1067 | host->ios.clock = hz; | |
1068 | mmc_set_ios(host); | |
1069 | } | |
1070 | ||
63e415c6 AH |
1071 | int mmc_execute_tuning(struct mmc_card *card) |
1072 | { | |
1073 | struct mmc_host *host = card->host; | |
1074 | u32 opcode; | |
1075 | int err; | |
1076 | ||
1077 | if (!host->ops->execute_tuning) | |
1078 | return 0; | |
1079 | ||
1080 | if (mmc_card_mmc(card)) | |
1081 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
1082 | else | |
1083 | opcode = MMC_SEND_TUNING_BLOCK; | |
1084 | ||
63e415c6 | 1085 | err = host->ops->execute_tuning(host, opcode); |
63e415c6 AH |
1086 | |
1087 | if (err) | |
1088 | pr_err("%s: tuning execution failed\n", mmc_hostname(host)); | |
79d5a65a AH |
1089 | else |
1090 | mmc_retune_enable(host); | |
63e415c6 AH |
1091 | |
1092 | return err; | |
1093 | } | |
1094 | ||
7ea239d9 PO |
1095 | /* |
1096 | * Change the bus mode (open drain/push-pull) of a host. | |
1097 | */ | |
1098 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1099 | { | |
1100 | host->ios.bus_mode = mode; | |
1101 | mmc_set_ios(host); | |
1102 | } | |
1103 | ||
0f8d8ea6 AH |
1104 | /* |
1105 | * Change data bus width of a host. | |
1106 | */ | |
1107 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1108 | { | |
4c4cb171 PR |
1109 | host->ios.bus_width = width; |
1110 | mmc_set_ios(host); | |
0f8d8ea6 AH |
1111 | } |
1112 | ||
2d079c43 JR |
1113 | /* |
1114 | * Set initial state after a power cycle or a hw_reset. | |
1115 | */ | |
1116 | void mmc_set_initial_state(struct mmc_host *host) | |
1117 | { | |
79d5a65a AH |
1118 | mmc_retune_disable(host); |
1119 | ||
2d079c43 JR |
1120 | if (mmc_host_is_spi(host)) |
1121 | host->ios.chip_select = MMC_CS_HIGH; | |
1122 | else | |
1123 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1124 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
1125 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
1126 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 1127 | host->ios.drv_type = 0; |
2d079c43 JR |
1128 | |
1129 | mmc_set_ios(host); | |
1130 | } | |
1131 | ||
86e8286a AV |
1132 | /** |
1133 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1134 | * @vdd: voltage (mV) | |
1135 | * @low_bits: prefer low bits in boundary cases | |
1136 | * | |
1137 | * This function returns the OCR bit number according to the provided @vdd | |
1138 | * value. If conversion is not possible a negative errno value returned. | |
1139 | * | |
1140 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1141 | * on boundary voltages. For example, | |
1142 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1143 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1144 | * | |
1145 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1146 | */ | |
1147 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1148 | { | |
1149 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1150 | int bit; | |
1151 | ||
1152 | if (vdd < 1650 || vdd > 3600) | |
1153 | return -EINVAL; | |
1154 | ||
1155 | if (vdd >= 1650 && vdd <= 1950) | |
1156 | return ilog2(MMC_VDD_165_195); | |
1157 | ||
1158 | if (low_bits) | |
1159 | vdd -= 1; | |
1160 | ||
1161 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1162 | bit = (vdd - 2000) / 100 + 8; | |
1163 | if (bit > max_bit) | |
1164 | return max_bit; | |
1165 | return bit; | |
1166 | } | |
1167 | ||
1168 | /** | |
1169 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1170 | * @vdd_min: minimum voltage value (mV) | |
1171 | * @vdd_max: maximum voltage value (mV) | |
1172 | * | |
1173 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1174 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1175 | * | |
1176 | * Notes wrt boundary cases: | |
1177 | * This function sets the OCR bits for all boundary voltages, for example | |
1178 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1179 | * MMC_VDD_34_35 mask. | |
1180 | */ | |
1181 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1182 | { | |
1183 | u32 mask = 0; | |
1184 | ||
1185 | if (vdd_max < vdd_min) | |
1186 | return 0; | |
1187 | ||
1188 | /* Prefer high bits for the boundary vdd_max values. */ | |
1189 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1190 | if (vdd_max < 0) | |
1191 | return 0; | |
1192 | ||
1193 | /* Prefer low bits for the boundary vdd_min values. */ | |
1194 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1195 | if (vdd_min < 0) | |
1196 | return 0; | |
1197 | ||
1198 | /* Fill the mask, from max bit to min bit. */ | |
1199 | while (vdd_max >= vdd_min) | |
1200 | mask |= 1 << vdd_max--; | |
1201 | ||
1202 | return mask; | |
1203 | } | |
1204 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1205 | ||
6e9e318b HZ |
1206 | #ifdef CONFIG_OF |
1207 | ||
1208 | /** | |
1209 | * mmc_of_parse_voltage - return mask of supported voltages | |
1210 | * @np: The device node need to be parsed. | |
1211 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1212 | * | |
1213 | * 1. Return zero on success. | |
1214 | * 2. Return negative errno: voltage-range is invalid. | |
1215 | */ | |
1216 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1217 | { | |
1218 | const u32 *voltage_ranges; | |
1219 | int num_ranges, i; | |
1220 | ||
1221 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1222 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
1223 | if (!voltage_ranges || !num_ranges) { | |
1224 | pr_info("%s: voltage-ranges unspecified\n", np->full_name); | |
1225 | return -EINVAL; | |
1226 | } | |
1227 | ||
1228 | for (i = 0; i < num_ranges; i++) { | |
1229 | const int j = i * 2; | |
1230 | u32 ocr_mask; | |
1231 | ||
1232 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1233 | be32_to_cpu(voltage_ranges[j]), | |
1234 | be32_to_cpu(voltage_ranges[j + 1])); | |
1235 | if (!ocr_mask) { | |
1236 | pr_err("%s: voltage-range #%d is invalid\n", | |
1237 | np->full_name, i); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | *mask |= ocr_mask; | |
1241 | } | |
1242 | ||
1243 | return 0; | |
1244 | } | |
1245 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1246 | ||
1247 | #endif /* CONFIG_OF */ | |
1248 | ||
25185f3f SH |
1249 | static int mmc_of_get_func_num(struct device_node *node) |
1250 | { | |
1251 | u32 reg; | |
1252 | int ret; | |
1253 | ||
1254 | ret = of_property_read_u32(node, "reg", ®); | |
1255 | if (ret < 0) | |
1256 | return ret; | |
1257 | ||
1258 | return reg; | |
1259 | } | |
1260 | ||
1261 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1262 | unsigned func_num) | |
1263 | { | |
1264 | struct device_node *node; | |
1265 | ||
1266 | if (!host->parent || !host->parent->of_node) | |
1267 | return NULL; | |
1268 | ||
1269 | for_each_child_of_node(host->parent->of_node, node) { | |
1270 | if (mmc_of_get_func_num(node) == func_num) | |
1271 | return node; | |
1272 | } | |
1273 | ||
1274 | return NULL; | |
1275 | } | |
1276 | ||
5c13941a DB |
1277 | #ifdef CONFIG_REGULATOR |
1278 | ||
310c805e HS |
1279 | /** |
1280 | * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage | |
1281 | * @vdd_bit: OCR bit number | |
1282 | * @min_uV: minimum voltage value (mV) | |
1283 | * @max_uV: maximum voltage value (mV) | |
1284 | * | |
1285 | * This function returns the voltage range according to the provided OCR | |
1286 | * bit number. If conversion is not possible a negative errno value returned. | |
1287 | */ | |
1288 | static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV) | |
1289 | { | |
1290 | int tmp; | |
1291 | ||
1292 | if (!vdd_bit) | |
1293 | return -EINVAL; | |
1294 | ||
1295 | /* | |
1296 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
1297 | * bits this regulator doesn't quite support ... don't | |
1298 | * be too picky, most cards and regulators are OK with | |
1299 | * a 0.1V range goof (it's a small error percentage). | |
1300 | */ | |
1301 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1302 | if (tmp == 0) { | |
1303 | *min_uV = 1650 * 1000; | |
1304 | *max_uV = 1950 * 1000; | |
1305 | } else { | |
1306 | *min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1307 | *max_uV = *min_uV + 100 * 1000; | |
1308 | } | |
1309 | ||
1310 | return 0; | |
1311 | } | |
1312 | ||
5c13941a DB |
1313 | /** |
1314 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1315 | * @supply: regulator to use | |
1316 | * | |
1317 | * This returns either a negative errno, or a mask of voltages that | |
1318 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1319 | * regulator. This would normally be called before registering the | |
1320 | * MMC host adapter. | |
1321 | */ | |
1322 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1323 | { | |
1324 | int result = 0; | |
1325 | int count; | |
1326 | int i; | |
9ed7ca89 JMC |
1327 | int vdd_uV; |
1328 | int vdd_mV; | |
5c13941a DB |
1329 | |
1330 | count = regulator_count_voltages(supply); | |
1331 | if (count < 0) | |
1332 | return count; | |
1333 | ||
1334 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1335 | vdd_uV = regulator_list_voltage(supply, i); |
1336 | if (vdd_uV <= 0) | |
1337 | continue; | |
1338 | ||
1339 | vdd_mV = vdd_uV / 1000; | |
1340 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1341 | } | |
1342 | ||
9ed7ca89 JMC |
1343 | if (!result) { |
1344 | vdd_uV = regulator_get_voltage(supply); | |
1345 | if (vdd_uV <= 0) | |
1346 | return vdd_uV; | |
1347 | ||
1348 | vdd_mV = vdd_uV / 1000; | |
1349 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1350 | } | |
1351 | ||
5c13941a DB |
1352 | return result; |
1353 | } | |
45a6b32e | 1354 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1355 | |
1356 | /** | |
1357 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1358 | * @mmc: the host to regulate |
5c13941a | 1359 | * @supply: regulator to use |
99fc5131 | 1360 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1361 | * |
1362 | * Returns zero on success, else negative errno. | |
1363 | * | |
1364 | * MMC host drivers may use this to enable or disable a regulator using | |
1365 | * a particular supply voltage. This would normally be called from the | |
1366 | * set_ios() method. | |
1367 | */ | |
99fc5131 LW |
1368 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1369 | struct regulator *supply, | |
1370 | unsigned short vdd_bit) | |
5c13941a DB |
1371 | { |
1372 | int result = 0; | |
1373 | int min_uV, max_uV; | |
5c13941a DB |
1374 | |
1375 | if (vdd_bit) { | |
310c805e | 1376 | mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV); |
5c13941a | 1377 | |
ca6429d4 | 1378 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1379 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1380 | result = regulator_enable(supply); |
99fc5131 LW |
1381 | if (!result) |
1382 | mmc->regulator_enabled = true; | |
1383 | } | |
1384 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1385 | result = regulator_disable(supply); |
99fc5131 LW |
1386 | if (result == 0) |
1387 | mmc->regulator_enabled = false; | |
5c13941a DB |
1388 | } |
1389 | ||
99fc5131 LW |
1390 | if (result) |
1391 | dev_err(mmc_dev(mmc), | |
1392 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1393 | return result; |
1394 | } | |
45a6b32e | 1395 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1396 | |
2086f801 DA |
1397 | static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator, |
1398 | int min_uV, int target_uV, | |
1399 | int max_uV) | |
1400 | { | |
1401 | /* | |
1402 | * Check if supported first to avoid errors since we may try several | |
1403 | * signal levels during power up and don't want to show errors. | |
1404 | */ | |
1405 | if (!regulator_is_supported_voltage(regulator, min_uV, max_uV)) | |
1406 | return -EINVAL; | |
1407 | ||
1408 | return regulator_set_voltage_triplet(regulator, min_uV, target_uV, | |
1409 | max_uV); | |
1410 | } | |
1411 | ||
1412 | /** | |
1413 | * mmc_regulator_set_vqmmc - Set VQMMC as per the ios | |
1414 | * | |
1415 | * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible. | |
1416 | * That will match the behavior of old boards where VQMMC and VMMC were supplied | |
1417 | * by the same supply. The Bus Operating conditions for 3.3V signaling in the | |
1418 | * SD card spec also define VQMMC in terms of VMMC. | |
1419 | * If this is not possible we'll try the full 2.7-3.6V of the spec. | |
1420 | * | |
1421 | * For 1.2V and 1.8V signaling we'll try to get as close as possible to the | |
1422 | * requested voltage. This is definitely a good idea for UHS where there's a | |
1423 | * separate regulator on the card that's trying to make 1.8V and it's best if | |
1424 | * we match. | |
1425 | * | |
1426 | * This function is expected to be used by a controller's | |
1427 | * start_signal_voltage_switch() function. | |
1428 | */ | |
1429 | int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios) | |
1430 | { | |
1431 | struct device *dev = mmc_dev(mmc); | |
1432 | int ret, volt, min_uV, max_uV; | |
1433 | ||
1434 | /* If no vqmmc supply then we can't change the voltage */ | |
1435 | if (IS_ERR(mmc->supply.vqmmc)) | |
1436 | return -EINVAL; | |
1437 | ||
1438 | switch (ios->signal_voltage) { | |
1439 | case MMC_SIGNAL_VOLTAGE_120: | |
1440 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1441 | 1100000, 1200000, 1300000); | |
1442 | case MMC_SIGNAL_VOLTAGE_180: | |
1443 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1444 | 1700000, 1800000, 1950000); | |
1445 | case MMC_SIGNAL_VOLTAGE_330: | |
1446 | ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV); | |
1447 | if (ret < 0) | |
1448 | return ret; | |
1449 | ||
1450 | dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n", | |
1451 | __func__, volt, max_uV); | |
1452 | ||
1453 | min_uV = max(volt - 300000, 2700000); | |
1454 | max_uV = min(max_uV + 200000, 3600000); | |
1455 | ||
1456 | /* | |
1457 | * Due to a limitation in the current implementation of | |
1458 | * regulator_set_voltage_triplet() which is taking the lowest | |
1459 | * voltage possible if below the target, search for a suitable | |
1460 | * voltage in two steps and try to stay close to vmmc | |
1461 | * with a 0.3V tolerance at first. | |
1462 | */ | |
1463 | if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1464 | min_uV, volt, max_uV)) | |
1465 | return 0; | |
1466 | ||
1467 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, | |
1468 | 2700000, volt, 3600000); | |
1469 | default: | |
1470 | return -EINVAL; | |
1471 | } | |
1472 | } | |
1473 | EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); | |
1474 | ||
4d1f52f9 TK |
1475 | #endif /* CONFIG_REGULATOR */ |
1476 | ||
e137788d GL |
1477 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1478 | { | |
1479 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1480 | int ret; |
1481 | ||
4d1f52f9 | 1482 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1483 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1484 | |
4d1f52f9 TK |
1485 | if (IS_ERR(mmc->supply.vmmc)) { |
1486 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1487 | return -EPROBE_DEFER; | |
1488 | dev_info(dev, "No vmmc regulator found\n"); | |
1489 | } else { | |
1490 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1491 | if (ret > 0) | |
1492 | mmc->ocr_avail = ret; | |
1493 | else | |
1494 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1495 | } | |
e137788d | 1496 | |
4d1f52f9 TK |
1497 | if (IS_ERR(mmc->supply.vqmmc)) { |
1498 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1499 | return -EPROBE_DEFER; | |
1500 | dev_info(dev, "No vqmmc regulator found\n"); | |
1501 | } | |
e137788d GL |
1502 | |
1503 | return 0; | |
1504 | } | |
1505 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1506 | ||
1da177e4 LT |
1507 | /* |
1508 | * Mask off any voltages we don't support and select | |
1509 | * the lowest voltage | |
1510 | */ | |
7ea239d9 | 1511 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1512 | { |
1513 | int bit; | |
1514 | ||
726d6f23 UH |
1515 | /* |
1516 | * Sanity check the voltages that the card claims to | |
1517 | * support. | |
1518 | */ | |
1519 | if (ocr & 0x7F) { | |
1520 | dev_warn(mmc_dev(host), | |
1521 | "card claims to support voltages below defined range\n"); | |
1522 | ocr &= ~0x7F; | |
1523 | } | |
1524 | ||
1da177e4 | 1525 | ocr &= host->ocr_avail; |
ce69d37b UH |
1526 | if (!ocr) { |
1527 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1528 | return 0; | |
1529 | } | |
1da177e4 | 1530 | |
ce69d37b UH |
1531 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1532 | bit = ffs(ocr) - 1; | |
63ef731a | 1533 | ocr &= 3 << bit; |
ce69d37b | 1534 | mmc_power_cycle(host, ocr); |
1da177e4 | 1535 | } else { |
ce69d37b UH |
1536 | bit = fls(ocr) - 1; |
1537 | ocr &= 3 << bit; | |
1538 | if (bit != host->ios.vdd) | |
1539 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1540 | } |
1541 | ||
1542 | return ocr; | |
1543 | } | |
1544 | ||
567c8903 JR |
1545 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
1546 | { | |
1547 | int err = 0; | |
1548 | int old_signal_voltage = host->ios.signal_voltage; | |
1549 | ||
1550 | host->ios.signal_voltage = signal_voltage; | |
9eadcc05 | 1551 | if (host->ops->start_signal_voltage_switch) |
567c8903 | 1552 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
567c8903 JR |
1553 | |
1554 | if (err) | |
1555 | host->ios.signal_voltage = old_signal_voltage; | |
1556 | ||
1557 | return err; | |
1558 | ||
1559 | } | |
1560 | ||
0f791fda | 1561 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr) |
f2119df6 AN |
1562 | { |
1563 | struct mmc_command cmd = {0}; | |
1564 | int err = 0; | |
0797e5f1 | 1565 | u32 clock; |
f2119df6 AN |
1566 | |
1567 | BUG_ON(!host); | |
1568 | ||
1569 | /* | |
1570 | * Send CMD11 only if the request is to switch the card to | |
1571 | * 1.8V signalling. | |
1572 | */ | |
0797e5f1 JR |
1573 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
1574 | return __mmc_set_signal_voltage(host, signal_voltage); | |
f2119df6 | 1575 | |
0797e5f1 JR |
1576 | /* |
1577 | * If we cannot switch voltages, return failure so the caller | |
1578 | * can continue without UHS mode | |
1579 | */ | |
1580 | if (!host->ops->start_signal_voltage_switch) | |
1581 | return -EPERM; | |
1582 | if (!host->ops->card_busy) | |
6606110d JP |
1583 | pr_warn("%s: cannot verify signal voltage switch\n", |
1584 | mmc_hostname(host)); | |
0797e5f1 JR |
1585 | |
1586 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1587 | cmd.arg = 0; | |
1588 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1589 | ||
1590 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1591 | if (err) | |
9eadcc05 UH |
1592 | return err; |
1593 | ||
1594 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1595 | return -EIO; | |
0797e5f1 | 1596 | |
0797e5f1 JR |
1597 | /* |
1598 | * The card should drive cmd and dat[0:3] low immediately | |
1599 | * after the response of cmd11, but wait 1 ms to be sure | |
1600 | */ | |
1601 | mmc_delay(1); | |
1602 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1603 | err = -EAGAIN; | |
1604 | goto power_cycle; | |
1605 | } | |
1606 | /* | |
1607 | * During a signal voltage level switch, the clock must be gated | |
1608 | * for 5 ms according to the SD spec | |
1609 | */ | |
1610 | clock = host->ios.clock; | |
1611 | host->ios.clock = 0; | |
1612 | mmc_set_ios(host); | |
f2119df6 | 1613 | |
0797e5f1 JR |
1614 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
1615 | /* | |
1616 | * Voltages may not have been switched, but we've already | |
1617 | * sent CMD11, so a power cycle is required anyway | |
1618 | */ | |
1619 | err = -EAGAIN; | |
1620 | goto power_cycle; | |
f2119df6 AN |
1621 | } |
1622 | ||
7c5209c3 DA |
1623 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
1624 | mmc_delay(10); | |
0797e5f1 JR |
1625 | host->ios.clock = clock; |
1626 | mmc_set_ios(host); | |
1627 | ||
1628 | /* Wait for at least 1 ms according to spec */ | |
1629 | mmc_delay(1); | |
1630 | ||
1631 | /* | |
1632 | * Failure to switch is indicated by the card holding | |
1633 | * dat[0:3] low | |
1634 | */ | |
1635 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1636 | err = -EAGAIN; | |
1637 | ||
1638 | power_cycle: | |
1639 | if (err) { | |
1640 | pr_debug("%s: Signal voltage switch failed, " | |
1641 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1642 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1643 | } |
1644 | ||
0797e5f1 | 1645 | return err; |
f2119df6 AN |
1646 | } |
1647 | ||
b57c43ad | 1648 | /* |
7ea239d9 | 1649 | * Select timing parameters for host. |
b57c43ad | 1650 | */ |
7ea239d9 | 1651 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1652 | { |
7ea239d9 PO |
1653 | host->ios.timing = timing; |
1654 | mmc_set_ios(host); | |
b57c43ad PO |
1655 | } |
1656 | ||
d6d50a15 AN |
1657 | /* |
1658 | * Select appropriate driver type for host. | |
1659 | */ | |
1660 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1661 | { | |
1662 | host->ios.drv_type = drv_type; | |
1663 | mmc_set_ios(host); | |
1664 | } | |
1665 | ||
e23350b3 AH |
1666 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1667 | int card_drv_type, int *drv_type) | |
1668 | { | |
1669 | struct mmc_host *host = card->host; | |
1670 | int host_drv_type = SD_DRIVER_TYPE_B; | |
e23350b3 AH |
1671 | |
1672 | *drv_type = 0; | |
1673 | ||
1674 | if (!host->ops->select_drive_strength) | |
1675 | return 0; | |
1676 | ||
1677 | /* Use SD definition of driver strength for hosts */ | |
1678 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1679 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1680 | ||
1681 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1682 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1683 | ||
1684 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1685 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1686 | ||
1687 | /* | |
1688 | * The drive strength that the hardware can support | |
1689 | * depends on the board design. Pass the appropriate | |
1690 | * information and let the hardware specific code | |
1691 | * return what is possible given the options | |
1692 | */ | |
9eadcc05 UH |
1693 | return host->ops->select_drive_strength(card, max_dtr, |
1694 | host_drv_type, | |
1695 | card_drv_type, | |
1696 | drv_type); | |
e23350b3 AH |
1697 | } |
1698 | ||
1da177e4 | 1699 | /* |
45f8245b RK |
1700 | * Apply power to the MMC stack. This is a two-stage process. |
1701 | * First, we enable power to the card without the clock running. | |
1702 | * We then wait a bit for the power to stabilise. Finally, | |
1703 | * enable the bus drivers and clock to the card. | |
1704 | * | |
1705 | * We must _NOT_ enable the clock prior to power stablising. | |
1706 | * | |
1707 | * If a host does all the power sequencing itself, ignore the | |
1708 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1709 | */ |
4a065193 | 1710 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1711 | { |
fa550189 UH |
1712 | if (host->ios.power_mode == MMC_POWER_ON) |
1713 | return; | |
1714 | ||
3aa8793f UH |
1715 | mmc_pwrseq_pre_power_on(host); |
1716 | ||
4a065193 | 1717 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1718 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1719 | /* Set initial state and call mmc_set_ios */ |
1720 | mmc_set_initial_state(host); | |
1da177e4 | 1721 | |
ceae98f2 TK |
1722 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
1723 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) | |
1724 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1725 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) | |
1726 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1727 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) | |
1728 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
108ecc4c | 1729 | |
f9996aee PO |
1730 | /* |
1731 | * This delay should be sufficient to allow the power supply | |
1732 | * to reach the minimum voltage. | |
1733 | */ | |
79bccc5a | 1734 | mmc_delay(10); |
1da177e4 | 1735 | |
4febb7e2 UH |
1736 | mmc_pwrseq_post_power_on(host); |
1737 | ||
88ae8b86 | 1738 | host->ios.clock = host->f_init; |
8dfd0374 | 1739 | |
1da177e4 | 1740 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1741 | mmc_set_ios(host); |
1da177e4 | 1742 | |
f9996aee PO |
1743 | /* |
1744 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1745 | * time required to reach a stable voltage. | |
1746 | */ | |
79bccc5a | 1747 | mmc_delay(10); |
1da177e4 LT |
1748 | } |
1749 | ||
7f7e4129 | 1750 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1751 | { |
fa550189 UH |
1752 | if (host->ios.power_mode == MMC_POWER_OFF) |
1753 | return; | |
1754 | ||
3aa8793f UH |
1755 | mmc_pwrseq_power_off(host); |
1756 | ||
1da177e4 LT |
1757 | host->ios.clock = 0; |
1758 | host->ios.vdd = 0; | |
b33d46c3 | 1759 | |
1da177e4 | 1760 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1761 | /* Set initial state and call mmc_set_ios */ |
1762 | mmc_set_initial_state(host); | |
778e277c | 1763 | |
041beb1d DD |
1764 | /* |
1765 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1766 | * XO-1.5, require a short delay after poweroff before the card | |
1767 | * can be successfully turned on again. | |
1768 | */ | |
1769 | mmc_delay(1); | |
1da177e4 LT |
1770 | } |
1771 | ||
4a065193 | 1772 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1773 | { |
1774 | mmc_power_off(host); | |
1775 | /* Wait at least 1 ms according to SD spec */ | |
1776 | mmc_delay(1); | |
4a065193 | 1777 | mmc_power_up(host, ocr); |
276e090f JR |
1778 | } |
1779 | ||
39361851 AB |
1780 | /* |
1781 | * Cleanup when the last reference to the bus operator is dropped. | |
1782 | */ | |
261172fd | 1783 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 AB |
1784 | { |
1785 | BUG_ON(!host); | |
1786 | BUG_ON(host->bus_refs); | |
1787 | BUG_ON(!host->bus_dead); | |
1788 | ||
1789 | host->bus_ops = NULL; | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Increase reference count of bus operator | |
1794 | */ | |
1795 | static inline void mmc_bus_get(struct mmc_host *host) | |
1796 | { | |
1797 | unsigned long flags; | |
1798 | ||
1799 | spin_lock_irqsave(&host->lock, flags); | |
1800 | host->bus_refs++; | |
1801 | spin_unlock_irqrestore(&host->lock, flags); | |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * Decrease reference count of bus operator and free it if | |
1806 | * it is the last reference. | |
1807 | */ | |
1808 | static inline void mmc_bus_put(struct mmc_host *host) | |
1809 | { | |
1810 | unsigned long flags; | |
1811 | ||
1812 | spin_lock_irqsave(&host->lock, flags); | |
1813 | host->bus_refs--; | |
1814 | if ((host->bus_refs == 0) && host->bus_ops) | |
1815 | __mmc_release_bus(host); | |
1816 | spin_unlock_irqrestore(&host->lock, flags); | |
1817 | } | |
1818 | ||
1da177e4 | 1819 | /* |
7ea239d9 PO |
1820 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1821 | * host at any given time. | |
1da177e4 | 1822 | */ |
7ea239d9 | 1823 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1824 | { |
7ea239d9 | 1825 | unsigned long flags; |
e45a1bd2 | 1826 | |
7ea239d9 PO |
1827 | BUG_ON(!host); |
1828 | BUG_ON(!ops); | |
b855885e | 1829 | |
d84075c8 | 1830 | WARN_ON(!host->claimed); |
bce40a36 | 1831 | |
7ea239d9 | 1832 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1833 | |
7ea239d9 PO |
1834 | BUG_ON(host->bus_ops); |
1835 | BUG_ON(host->bus_refs); | |
b57c43ad | 1836 | |
7ea239d9 PO |
1837 | host->bus_ops = ops; |
1838 | host->bus_refs = 1; | |
1839 | host->bus_dead = 0; | |
b57c43ad | 1840 | |
7ea239d9 | 1841 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1842 | } |
1843 | ||
7ea239d9 | 1844 | /* |
7f7e4129 | 1845 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1846 | */ |
1847 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1848 | { |
7ea239d9 | 1849 | unsigned long flags; |
7ccd266e | 1850 | |
7ea239d9 | 1851 | BUG_ON(!host); |
7ccd266e | 1852 | |
d84075c8 PO |
1853 | WARN_ON(!host->claimed); |
1854 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1855 | |
7ea239d9 | 1856 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1857 | |
7ea239d9 | 1858 | host->bus_dead = 1; |
7ccd266e | 1859 | |
7ea239d9 | 1860 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1861 | |
7ea239d9 | 1862 | mmc_bus_put(host); |
1da177e4 LT |
1863 | } |
1864 | ||
bbd43682 UH |
1865 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1866 | bool cd_irq) | |
1867 | { | |
1868 | #ifdef CONFIG_MMC_DEBUG | |
1869 | unsigned long flags; | |
1870 | spin_lock_irqsave(&host->lock, flags); | |
1871 | WARN_ON(host->removed); | |
1872 | spin_unlock_irqrestore(&host->lock, flags); | |
1873 | #endif | |
1874 | ||
1875 | /* | |
1876 | * If the device is configured as wakeup, we prevent a new sleep for | |
1877 | * 5 s to give provision for user space to consume the event. | |
1878 | */ | |
1879 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1880 | device_can_wakeup(mmc_dev(host))) | |
1881 | pm_wakeup_event(mmc_dev(host), 5000); | |
1882 | ||
1883 | host->detect_change = 1; | |
1884 | mmc_schedule_delayed_work(&host->detect, delay); | |
1885 | } | |
1886 | ||
1da177e4 LT |
1887 | /** |
1888 | * mmc_detect_change - process change of state on a MMC socket | |
1889 | * @host: host which changed state. | |
8dc00335 | 1890 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1891 | * |
67a61c48 PO |
1892 | * MMC drivers should call this when they detect a card has been |
1893 | * inserted or removed. The MMC layer will confirm that any | |
1894 | * present card is still functional, and initialize any newly | |
1895 | * inserted. | |
1da177e4 | 1896 | */ |
8dc00335 | 1897 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1898 | { |
bbd43682 | 1899 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1900 | } |
1da177e4 LT |
1901 | EXPORT_SYMBOL(mmc_detect_change); |
1902 | ||
dfe86cba AH |
1903 | void mmc_init_erase(struct mmc_card *card) |
1904 | { | |
1905 | unsigned int sz; | |
1906 | ||
1907 | if (is_power_of_2(card->erase_size)) | |
1908 | card->erase_shift = ffs(card->erase_size) - 1; | |
1909 | else | |
1910 | card->erase_shift = 0; | |
1911 | ||
1912 | /* | |
1913 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1914 | * card. That is not desirable because it can take a long time | |
1915 | * (minutes) potentially delaying more important I/O, and also the | |
1916 | * timeout calculations become increasingly hugely over-estimated. | |
1917 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1918 | * to that size and alignment. | |
1919 | * | |
1920 | * For SD cards that define Allocation Unit size, limit erases to one | |
1921 | * Allocation Unit at a time. For MMC cards that define High Capacity | |
1922 | * Erase Size, whether it is switched on or not, limit to that size. | |
1923 | * Otherwise just have a stab at a good value. For modern cards it | |
1924 | * will end up being 4MiB. Note that if the value is too small, it | |
1925 | * can end up taking longer to erase. | |
1926 | */ | |
1927 | if (mmc_card_sd(card) && card->ssr.au) { | |
1928 | card->pref_erase = card->ssr.au; | |
1929 | card->erase_shift = ffs(card->ssr.au) - 1; | |
1930 | } else if (card->ext_csd.hc_erase_size) { | |
1931 | card->pref_erase = card->ext_csd.hc_erase_size; | |
cc8aa7de | 1932 | } else if (card->erase_size) { |
dfe86cba AH |
1933 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1934 | if (sz < 128) | |
1935 | card->pref_erase = 512 * 1024 / 512; | |
1936 | else if (sz < 512) | |
1937 | card->pref_erase = 1024 * 1024 / 512; | |
1938 | else if (sz < 1024) | |
1939 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1940 | else | |
1941 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1942 | if (card->pref_erase < card->erase_size) | |
1943 | card->pref_erase = card->erase_size; | |
1944 | else { | |
1945 | sz = card->pref_erase % card->erase_size; | |
1946 | if (sz) | |
1947 | card->pref_erase += card->erase_size - sz; | |
1948 | } | |
cc8aa7de CD |
1949 | } else |
1950 | card->pref_erase = 0; | |
dfe86cba AH |
1951 | } |
1952 | ||
eaa02f75 AW |
1953 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1954 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1955 | { |
1956 | unsigned int erase_timeout; | |
1957 | ||
7194efb8 AH |
1958 | if (arg == MMC_DISCARD_ARG || |
1959 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1960 | erase_timeout = card->ext_csd.trim_timeout; | |
1961 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1962 | /* High Capacity Erase Group Size uses HC timeouts */ |
1963 | if (arg == MMC_TRIM_ARG) | |
1964 | erase_timeout = card->ext_csd.trim_timeout; | |
1965 | else | |
1966 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1967 | } else { | |
1968 | /* CSD Erase Group Size uses write timeout */ | |
1969 | unsigned int mult = (10 << card->csd.r2w_factor); | |
1970 | unsigned int timeout_clks = card->csd.tacc_clks * mult; | |
1971 | unsigned int timeout_us; | |
1972 | ||
1973 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ | |
1974 | if (card->csd.tacc_ns < 1000000) | |
1975 | timeout_us = (card->csd.tacc_ns * mult) / 1000; | |
1976 | else | |
1977 | timeout_us = (card->csd.tacc_ns / 1000) * mult; | |
1978 | ||
1979 | /* | |
1980 | * ios.clock is only a target. The real clock rate might be | |
1981 | * less but not that much less, so fudge it by multiplying by 2. | |
1982 | */ | |
1983 | timeout_clks <<= 1; | |
1984 | timeout_us += (timeout_clks * 1000) / | |
9eadcc05 | 1985 | (card->host->ios.clock / 1000); |
dfe86cba AH |
1986 | |
1987 | erase_timeout = timeout_us / 1000; | |
1988 | ||
1989 | /* | |
1990 | * Theoretically, the calculation could underflow so round up | |
1991 | * to 1ms in that case. | |
1992 | */ | |
1993 | if (!erase_timeout) | |
1994 | erase_timeout = 1; | |
1995 | } | |
1996 | ||
1997 | /* Multiplier for secure operations */ | |
1998 | if (arg & MMC_SECURE_ARGS) { | |
1999 | if (arg == MMC_SECURE_ERASE_ARG) | |
2000 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
2001 | else | |
2002 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
2003 | } | |
2004 | ||
2005 | erase_timeout *= qty; | |
2006 | ||
2007 | /* | |
2008 | * Ensure at least a 1 second timeout for SPI as per | |
2009 | * 'mmc_set_data_timeout()' | |
2010 | */ | |
2011 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
2012 | erase_timeout = 1000; | |
2013 | ||
eaa02f75 | 2014 | return erase_timeout; |
dfe86cba AH |
2015 | } |
2016 | ||
eaa02f75 AW |
2017 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
2018 | unsigned int arg, | |
2019 | unsigned int qty) | |
dfe86cba | 2020 | { |
eaa02f75 AW |
2021 | unsigned int erase_timeout; |
2022 | ||
dfe86cba AH |
2023 | if (card->ssr.erase_timeout) { |
2024 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
2025 | erase_timeout = card->ssr.erase_timeout * qty + |
2026 | card->ssr.erase_offset; | |
dfe86cba AH |
2027 | } else { |
2028 | /* | |
2029 | * Erase timeout not specified in SD Status Register (SSR) so | |
2030 | * use 250ms per write block. | |
2031 | */ | |
eaa02f75 | 2032 | erase_timeout = 250 * qty; |
dfe86cba AH |
2033 | } |
2034 | ||
2035 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
2036 | if (erase_timeout < 1000) |
2037 | erase_timeout = 1000; | |
2038 | ||
2039 | return erase_timeout; | |
dfe86cba AH |
2040 | } |
2041 | ||
eaa02f75 AW |
2042 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
2043 | unsigned int arg, | |
2044 | unsigned int qty) | |
dfe86cba AH |
2045 | { |
2046 | if (mmc_card_sd(card)) | |
eaa02f75 | 2047 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 2048 | else |
eaa02f75 | 2049 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2050 | } |
2051 | ||
2052 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
2053 | unsigned int to, unsigned int arg) | |
2054 | { | |
1278dba1 | 2055 | struct mmc_command cmd = {0}; |
dfe86cba | 2056 | unsigned int qty = 0; |
8fee476b | 2057 | unsigned long timeout; |
dfe86cba AH |
2058 | int err; |
2059 | ||
8f11d106 AH |
2060 | mmc_retune_hold(card->host); |
2061 | ||
dfe86cba AH |
2062 | /* |
2063 | * qty is used to calculate the erase timeout which depends on how many | |
2064 | * erase groups (or allocation units in SD terminology) are affected. | |
2065 | * We count erasing part of an erase group as one erase group. | |
2066 | * For SD, the allocation units are always a power of 2. For MMC, the | |
2067 | * erase group size is almost certainly also power of 2, but it does not | |
2068 | * seem to insist on that in the JEDEC standard, so we fall back to | |
2069 | * division in that case. SD may not specify an allocation unit size, | |
2070 | * in which case the timeout is based on the number of write blocks. | |
2071 | * | |
2072 | * Note that the timeout for secure trim 2 will only be correct if the | |
2073 | * number of erase groups specified is the same as the total of all | |
2074 | * preceding secure trim 1 commands. Since the power may have been | |
2075 | * lost since the secure trim 1 commands occurred, it is generally | |
2076 | * impossible to calculate the secure trim 2 timeout correctly. | |
2077 | */ | |
2078 | if (card->erase_shift) | |
2079 | qty += ((to >> card->erase_shift) - | |
2080 | (from >> card->erase_shift)) + 1; | |
2081 | else if (mmc_card_sd(card)) | |
2082 | qty += to - from + 1; | |
2083 | else | |
2084 | qty += ((to / card->erase_size) - | |
2085 | (from / card->erase_size)) + 1; | |
2086 | ||
2087 | if (!mmc_card_blockaddr(card)) { | |
2088 | from <<= 9; | |
2089 | to <<= 9; | |
2090 | } | |
2091 | ||
dfe86cba AH |
2092 | if (mmc_card_sd(card)) |
2093 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
2094 | else | |
2095 | cmd.opcode = MMC_ERASE_GROUP_START; | |
2096 | cmd.arg = from; | |
2097 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2098 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2099 | if (err) { | |
a3c76eb9 | 2100 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 2101 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 2102 | err = -EIO; |
dfe86cba AH |
2103 | goto out; |
2104 | } | |
2105 | ||
2106 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2107 | if (mmc_card_sd(card)) | |
2108 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
2109 | else | |
2110 | cmd.opcode = MMC_ERASE_GROUP_END; | |
2111 | cmd.arg = to; | |
2112 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2113 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2114 | if (err) { | |
a3c76eb9 | 2115 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 2116 | err, cmd.resp[0]); |
67716327 | 2117 | err = -EIO; |
dfe86cba AH |
2118 | goto out; |
2119 | } | |
2120 | ||
2121 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2122 | cmd.opcode = MMC_ERASE; | |
2123 | cmd.arg = arg; | |
2124 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1d4d7744 | 2125 | cmd.busy_timeout = mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2126 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
2127 | if (err) { | |
a3c76eb9 | 2128 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
2129 | err, cmd.resp[0]); |
2130 | err = -EIO; | |
2131 | goto out; | |
2132 | } | |
2133 | ||
2134 | if (mmc_host_is_spi(card->host)) | |
2135 | goto out; | |
2136 | ||
8fee476b | 2137 | timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); |
dfe86cba AH |
2138 | do { |
2139 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2140 | cmd.opcode = MMC_SEND_STATUS; | |
2141 | cmd.arg = card->rca << 16; | |
2142 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
2143 | /* Do not retry else we can't see errors */ | |
2144 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2145 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 2146 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
2147 | err, cmd.resp[0]); |
2148 | err = -EIO; | |
2149 | goto out; | |
2150 | } | |
8fee476b TR |
2151 | |
2152 | /* Timeout if the device never becomes ready for data and | |
2153 | * never leaves the program state. | |
2154 | */ | |
2155 | if (time_after(jiffies, timeout)) { | |
2156 | pr_err("%s: Card stuck in programming state! %s\n", | |
2157 | mmc_hostname(card->host), __func__); | |
2158 | err = -EIO; | |
2159 | goto out; | |
2160 | } | |
2161 | ||
dfe86cba | 2162 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2163 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba | 2164 | out: |
8f11d106 | 2165 | mmc_retune_release(card->host); |
dfe86cba AH |
2166 | return err; |
2167 | } | |
2168 | ||
2169 | /** | |
2170 | * mmc_erase - erase sectors. | |
2171 | * @card: card to erase | |
2172 | * @from: first sector to erase | |
2173 | * @nr: number of sectors to erase | |
2174 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2175 | * | |
2176 | * Caller must claim host before calling this function. | |
2177 | */ | |
2178 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2179 | unsigned int arg) | |
2180 | { | |
2181 | unsigned int rem, to = from + nr; | |
642c28ab | 2182 | int err; |
dfe86cba AH |
2183 | |
2184 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2185 | !(card->csd.cmdclass & CCC_ERASE)) | |
2186 | return -EOPNOTSUPP; | |
2187 | ||
2188 | if (!card->erase_size) | |
2189 | return -EOPNOTSUPP; | |
2190 | ||
2191 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2192 | return -EOPNOTSUPP; | |
2193 | ||
2194 | if ((arg & MMC_SECURE_ARGS) && | |
2195 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2196 | return -EOPNOTSUPP; | |
2197 | ||
2198 | if ((arg & MMC_TRIM_ARGS) && | |
2199 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2200 | return -EOPNOTSUPP; | |
2201 | ||
2202 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2203 | if (from % card->erase_size || nr % card->erase_size) | |
2204 | return -EINVAL; | |
2205 | } | |
2206 | ||
2207 | if (arg == MMC_ERASE_ARG) { | |
2208 | rem = from % card->erase_size; | |
2209 | if (rem) { | |
2210 | rem = card->erase_size - rem; | |
2211 | from += rem; | |
2212 | if (nr > rem) | |
2213 | nr -= rem; | |
2214 | else | |
2215 | return 0; | |
2216 | } | |
2217 | rem = nr % card->erase_size; | |
2218 | if (rem) | |
2219 | nr -= rem; | |
2220 | } | |
2221 | ||
2222 | if (nr == 0) | |
2223 | return 0; | |
2224 | ||
2225 | to = from + nr; | |
2226 | ||
2227 | if (to <= from) | |
2228 | return -EINVAL; | |
2229 | ||
2230 | /* 'from' and 'to' are inclusive */ | |
2231 | to -= 1; | |
2232 | ||
642c28ab DJ |
2233 | /* |
2234 | * Special case where only one erase-group fits in the timeout budget: | |
2235 | * If the region crosses an erase-group boundary on this particular | |
2236 | * case, we will be trimming more than one erase-group which, does not | |
2237 | * fit in the timeout budget of the controller, so we need to split it | |
2238 | * and call mmc_do_erase() twice if necessary. This special case is | |
2239 | * identified by the card->eg_boundary flag. | |
2240 | */ | |
22d7e85f RG |
2241 | rem = card->erase_size - (from % card->erase_size); |
2242 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
2243 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
2244 | from += rem; | |
2245 | if ((err) || (to <= from)) | |
2246 | return err; | |
2247 | } | |
2248 | ||
dfe86cba AH |
2249 | return mmc_do_erase(card, from, to, arg); |
2250 | } | |
2251 | EXPORT_SYMBOL(mmc_erase); | |
2252 | ||
2253 | int mmc_can_erase(struct mmc_card *card) | |
2254 | { | |
2255 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2256 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2257 | return 1; | |
2258 | return 0; | |
2259 | } | |
2260 | EXPORT_SYMBOL(mmc_can_erase); | |
2261 | ||
2262 | int mmc_can_trim(struct mmc_card *card) | |
2263 | { | |
b5b4ff0a SL |
2264 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
2265 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
2266 | return 1; |
2267 | return 0; | |
2268 | } | |
2269 | EXPORT_SYMBOL(mmc_can_trim); | |
2270 | ||
b3bf9153 KP |
2271 | int mmc_can_discard(struct mmc_card *card) |
2272 | { | |
2273 | /* | |
2274 | * As there's no way to detect the discard support bit at v4.5 | |
2275 | * use the s/w feature support filed. | |
2276 | */ | |
2277 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2278 | return 1; | |
2279 | return 0; | |
2280 | } | |
2281 | EXPORT_SYMBOL(mmc_can_discard); | |
2282 | ||
d9ddd629 KP |
2283 | int mmc_can_sanitize(struct mmc_card *card) |
2284 | { | |
28302812 AH |
2285 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2286 | return 0; | |
d9ddd629 KP |
2287 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2288 | return 1; | |
2289 | return 0; | |
2290 | } | |
2291 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2292 | ||
dfe86cba AH |
2293 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2294 | { | |
5204d00f LC |
2295 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2296 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2297 | return 1; |
2298 | return 0; | |
2299 | } | |
2300 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2301 | ||
2302 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2303 | unsigned int nr) | |
2304 | { | |
2305 | if (!card->erase_size) | |
2306 | return 0; | |
2307 | if (from % card->erase_size || nr % card->erase_size) | |
2308 | return 0; | |
2309 | return 1; | |
2310 | } | |
2311 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2312 | |
e056a1b5 AH |
2313 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2314 | unsigned int arg) | |
2315 | { | |
2316 | struct mmc_host *host = card->host; | |
2317 | unsigned int max_discard, x, y, qty = 0, max_qty, timeout; | |
2318 | unsigned int last_timeout = 0; | |
2319 | ||
2320 | if (card->erase_shift) | |
2321 | max_qty = UINT_MAX >> card->erase_shift; | |
2322 | else if (mmc_card_sd(card)) | |
2323 | max_qty = UINT_MAX; | |
2324 | else | |
2325 | max_qty = UINT_MAX / card->erase_size; | |
2326 | ||
2327 | /* Find the largest qty with an OK timeout */ | |
2328 | do { | |
2329 | y = 0; | |
2330 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2331 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
68eb80e0 | 2332 | if (timeout > host->max_busy_timeout) |
e056a1b5 AH |
2333 | break; |
2334 | if (timeout < last_timeout) | |
2335 | break; | |
2336 | last_timeout = timeout; | |
2337 | y = x; | |
2338 | } | |
2339 | qty += y; | |
2340 | } while (y); | |
2341 | ||
2342 | if (!qty) | |
2343 | return 0; | |
2344 | ||
642c28ab DJ |
2345 | /* |
2346 | * When specifying a sector range to trim, chances are we might cross | |
2347 | * an erase-group boundary even if the amount of sectors is less than | |
2348 | * one erase-group. | |
2349 | * If we can only fit one erase-group in the controller timeout budget, | |
2350 | * we have to care that erase-group boundaries are not crossed by a | |
2351 | * single trim operation. We flag that special case with "eg_boundary". | |
2352 | * In all other cases we can just decrement qty and pretend that we | |
2353 | * always touch (qty + 1) erase-groups as a simple optimization. | |
2354 | */ | |
e056a1b5 | 2355 | if (qty == 1) |
642c28ab DJ |
2356 | card->eg_boundary = 1; |
2357 | else | |
2358 | qty--; | |
e056a1b5 AH |
2359 | |
2360 | /* Convert qty to sectors */ | |
2361 | if (card->erase_shift) | |
642c28ab | 2362 | max_discard = qty << card->erase_shift; |
e056a1b5 | 2363 | else if (mmc_card_sd(card)) |
642c28ab | 2364 | max_discard = qty + 1; |
e056a1b5 | 2365 | else |
642c28ab | 2366 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
2367 | |
2368 | return max_discard; | |
2369 | } | |
2370 | ||
2371 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2372 | { | |
2373 | struct mmc_host *host = card->host; | |
2374 | unsigned int max_discard, max_trim; | |
2375 | ||
68eb80e0 | 2376 | if (!host->max_busy_timeout) |
e056a1b5 AH |
2377 | return UINT_MAX; |
2378 | ||
2379 | /* | |
2380 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2381 | * frequence which can change. In that case, the best choice is | |
2382 | * just the preferred erase size. | |
2383 | */ | |
2384 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2385 | return card->pref_erase; | |
2386 | ||
2387 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2388 | if (mmc_can_trim(card)) { | |
2389 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2390 | if (max_trim < max_discard) | |
2391 | max_discard = max_trim; | |
2392 | } else if (max_discard < card->erase_size) { | |
2393 | max_discard = 0; | |
2394 | } | |
2395 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
68eb80e0 | 2396 | mmc_hostname(host), max_discard, host->max_busy_timeout); |
e056a1b5 AH |
2397 | return max_discard; |
2398 | } | |
2399 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2400 | ||
0f8d8ea6 AH |
2401 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2402 | { | |
1278dba1 | 2403 | struct mmc_command cmd = {0}; |
0f8d8ea6 | 2404 | |
cdc99179 | 2405 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card)) |
0f8d8ea6 AH |
2406 | return 0; |
2407 | ||
0f8d8ea6 AH |
2408 | cmd.opcode = MMC_SET_BLOCKLEN; |
2409 | cmd.arg = blocklen; | |
2410 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2411 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2412 | } | |
2413 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2414 | ||
67c79db8 LP |
2415 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2416 | bool is_rel_write) | |
2417 | { | |
2418 | struct mmc_command cmd = {0}; | |
2419 | ||
2420 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2421 | cmd.arg = blockcount & 0x0000FFFF; | |
2422 | if (is_rel_write) | |
2423 | cmd.arg |= 1 << 31; | |
2424 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2425 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2426 | } | |
2427 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2428 | ||
b2499518 AH |
2429 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2430 | { | |
2431 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) | |
2432 | return; | |
b2499518 | 2433 | host->ops->hw_reset(host); |
b2499518 AH |
2434 | } |
2435 | ||
83533ab2 | 2436 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2437 | { |
f855a371 | 2438 | int ret; |
b2499518 | 2439 | |
f855a371 | 2440 | if (!host->card) |
b2499518 AH |
2441 | return -EINVAL; |
2442 | ||
f855a371 JR |
2443 | mmc_bus_get(host); |
2444 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { | |
2445 | mmc_bus_put(host); | |
b2499518 | 2446 | return -EOPNOTSUPP; |
b2499518 AH |
2447 | } |
2448 | ||
f855a371 JR |
2449 | ret = host->bus_ops->reset(host); |
2450 | mmc_bus_put(host); | |
b2499518 | 2451 | |
0250fdf2 AH |
2452 | if (ret != -EOPNOTSUPP) |
2453 | pr_warn("%s: tried to reset card\n", mmc_hostname(host)); | |
b2499518 | 2454 | |
f855a371 | 2455 | return ret; |
b2499518 | 2456 | } |
b2499518 AH |
2457 | EXPORT_SYMBOL(mmc_hw_reset); |
2458 | ||
807e8e40 AR |
2459 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2460 | { | |
2461 | host->f_init = freq; | |
2462 | ||
2463 | #ifdef CONFIG_MMC_DEBUG | |
2464 | pr_info("%s: %s: trying to init card at %u Hz\n", | |
2465 | mmc_hostname(host), __func__, host->f_init); | |
2466 | #endif | |
4a065193 | 2467 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2468 | |
b2499518 AH |
2469 | /* |
2470 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2471 | * do a hardware reset if possible. | |
2472 | */ | |
2473 | mmc_hw_reset_for_init(host); | |
2474 | ||
2f94e55a PR |
2475 | /* |
2476 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2477 | * if the card is being re-initialized, just send it. CMD52 | |
2478 | * should be ignored by SD/eMMC cards. | |
2479 | */ | |
807e8e40 AR |
2480 | sdio_reset(host); |
2481 | mmc_go_idle(host); | |
2482 | ||
2483 | mmc_send_if_cond(host, host->ocr_avail); | |
2484 | ||
2485 | /* Order's important: probe SDIO, then SD, then MMC */ | |
2486 | if (!mmc_attach_sdio(host)) | |
2487 | return 0; | |
2488 | if (!mmc_attach_sd(host)) | |
2489 | return 0; | |
2490 | if (!mmc_attach_mmc(host)) | |
2491 | return 0; | |
2492 | ||
2493 | mmc_power_off(host); | |
2494 | return -EIO; | |
2495 | } | |
2496 | ||
d3049504 AH |
2497 | int _mmc_detect_card_removed(struct mmc_host *host) |
2498 | { | |
2499 | int ret; | |
2500 | ||
5601aaf7 | 2501 | if (host->caps & MMC_CAP_NONREMOVABLE) |
d3049504 AH |
2502 | return 0; |
2503 | ||
2504 | if (!host->card || mmc_card_removed(host->card)) | |
2505 | return 1; | |
2506 | ||
2507 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2508 | |
2509 | /* | |
2510 | * Card detect status and alive check may be out of sync if card is | |
2511 | * removed slowly, when card detect switch changes while card/slot | |
2512 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2513 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2514 | * detect work 200ms later for this case. | |
2515 | */ | |
2516 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2517 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2518 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2519 | } | |
2520 | ||
d3049504 AH |
2521 | if (ret) { |
2522 | mmc_card_set_removed(host->card); | |
2523 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2524 | } | |
2525 | ||
2526 | return ret; | |
2527 | } | |
2528 | ||
2529 | int mmc_detect_card_removed(struct mmc_host *host) | |
2530 | { | |
2531 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2532 | int ret; |
d3049504 AH |
2533 | |
2534 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2535 | |
2536 | if (!card) | |
2537 | return 1; | |
2538 | ||
2539 | ret = mmc_card_removed(card); | |
d3049504 AH |
2540 | /* |
2541 | * The card will be considered unchanged unless we have been asked to | |
2542 | * detect a change or host requires polling to provide card detection. | |
2543 | */ | |
b6891679 | 2544 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2545 | return ret; |
d3049504 AH |
2546 | |
2547 | host->detect_change = 0; | |
f0cc9cf9 UH |
2548 | if (!ret) { |
2549 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2550 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2551 | /* |
2552 | * Schedule a detect work as soon as possible to let a | |
2553 | * rescan handle the card removal. | |
2554 | */ | |
2555 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2556 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2557 | } |
2558 | } | |
d3049504 | 2559 | |
f0cc9cf9 | 2560 | return ret; |
d3049504 AH |
2561 | } |
2562 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2563 | ||
b93931a6 | 2564 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2565 | { |
c4028958 DH |
2566 | struct mmc_host *host = |
2567 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2568 | int i; |
4c2ef25f | 2569 | |
fa372a51 MM |
2570 | if (host->trigger_card_event && host->ops->card_event) { |
2571 | host->ops->card_event(host); | |
2572 | host->trigger_card_event = false; | |
2573 | } | |
2574 | ||
807e8e40 | 2575 | if (host->rescan_disable) |
4c2ef25f | 2576 | return; |
1da177e4 | 2577 | |
3339d1e3 JR |
2578 | /* If there is a non-removable card registered, only scan once */ |
2579 | if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) | |
2580 | return; | |
2581 | host->rescan_entered = 1; | |
2582 | ||
7ea239d9 | 2583 | mmc_bus_get(host); |
b855885e | 2584 | |
30201e7f OBC |
2585 | /* |
2586 | * if there is a _removable_ card registered, check whether it is | |
2587 | * still present | |
2588 | */ | |
5601aaf7 | 2589 | if (host->bus_ops && !host->bus_dead |
bad3baba | 2590 | && !(host->caps & MMC_CAP_NONREMOVABLE)) |
94d89efb JS |
2591 | host->bus_ops->detect(host); |
2592 | ||
d3049504 AH |
2593 | host->detect_change = 0; |
2594 | ||
c5841798 CB |
2595 | /* |
2596 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2597 | * the card is no longer present. | |
2598 | */ | |
94d89efb | 2599 | mmc_bus_put(host); |
94d89efb JS |
2600 | mmc_bus_get(host); |
2601 | ||
2602 | /* if there still is a card present, stop here */ | |
2603 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2604 | mmc_bus_put(host); |
94d89efb JS |
2605 | goto out; |
2606 | } | |
1da177e4 | 2607 | |
94d89efb JS |
2608 | /* |
2609 | * Only we can add a new handler, so it's safe to | |
2610 | * release the lock here. | |
2611 | */ | |
2612 | mmc_bus_put(host); | |
1da177e4 | 2613 | |
c1b55bfc SH |
2614 | if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && |
2615 | host->ops->get_cd(host) == 0) { | |
fa550189 UH |
2616 | mmc_claim_host(host); |
2617 | mmc_power_off(host); | |
2618 | mmc_release_host(host); | |
94d89efb | 2619 | goto out; |
fa550189 | 2620 | } |
1da177e4 | 2621 | |
807e8e40 | 2622 | mmc_claim_host(host); |
88ae8b86 | 2623 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2624 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2625 | break; | |
06b2233a | 2626 | if (freqs[i] <= host->f_min) |
807e8e40 | 2627 | break; |
88ae8b86 | 2628 | } |
807e8e40 AR |
2629 | mmc_release_host(host); |
2630 | ||
2631 | out: | |
28f52482 AV |
2632 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2633 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2634 | } |
2635 | ||
b93931a6 | 2636 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2637 | { |
fa550189 | 2638 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2639 | host->rescan_disable = 0; |
8af465db | 2640 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
8d1ffc8c UH |
2641 | |
2642 | mmc_claim_host(host); | |
a08b17be AH |
2643 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
2644 | mmc_power_off(host); | |
2645 | else | |
4a065193 | 2646 | mmc_power_up(host, host->ocr_avail); |
8d1ffc8c UH |
2647 | mmc_release_host(host); |
2648 | ||
740a221e | 2649 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2650 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2651 | } |
2652 | ||
b93931a6 | 2653 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2654 | { |
3b91e550 | 2655 | #ifdef CONFIG_MMC_DEBUG |
1efd48b3 PO |
2656 | unsigned long flags; |
2657 | spin_lock_irqsave(&host->lock, flags); | |
3b91e550 | 2658 | host->removed = 1; |
1efd48b3 | 2659 | spin_unlock_irqrestore(&host->lock, flags); |
3b91e550 | 2660 | #endif |
740a221e AH |
2661 | if (host->slot.cd_irq >= 0) |
2662 | disable_irq(host->slot.cd_irq); | |
3b91e550 | 2663 | |
d9adcc12 | 2664 | host->rescan_disable = 1; |
d9bcbf34 | 2665 | cancel_delayed_work_sync(&host->detect); |
3b91e550 PO |
2666 | mmc_flush_scheduled_work(); |
2667 | ||
da68c4eb NP |
2668 | /* clear pm flags now and let card drivers set them as needed */ |
2669 | host->pm_flags = 0; | |
2670 | ||
7ea239d9 PO |
2671 | mmc_bus_get(host); |
2672 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2673 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2674 | host->bus_ops->remove(host); |
7ea239d9 PO |
2675 | mmc_claim_host(host); |
2676 | mmc_detach_bus(host); | |
7f7e4129 | 2677 | mmc_power_off(host); |
7ea239d9 | 2678 | mmc_release_host(host); |
53509f0f DK |
2679 | mmc_bus_put(host); |
2680 | return; | |
1da177e4 | 2681 | } |
7ea239d9 PO |
2682 | mmc_bus_put(host); |
2683 | ||
2684 | BUG_ON(host->card); | |
1da177e4 | 2685 | |
8d1ffc8c | 2686 | mmc_claim_host(host); |
1da177e4 | 2687 | mmc_power_off(host); |
8d1ffc8c | 2688 | mmc_release_host(host); |
1da177e4 LT |
2689 | } |
2690 | ||
12ae637f | 2691 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2692 | { |
12ae637f OBC |
2693 | int ret = 0; |
2694 | ||
bb9cab94 DD |
2695 | #ifdef CONFIG_MMC_DEBUG |
2696 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); | |
2697 | #endif | |
2698 | ||
eae1aeee AH |
2699 | mmc_bus_get(host); |
2700 | ||
5601aaf7 | 2701 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2702 | mmc_bus_put(host); |
12ae637f | 2703 | return -EINVAL; |
eae1aeee AH |
2704 | } |
2705 | ||
2706 | if (host->bus_ops->power_save) | |
12ae637f | 2707 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2708 | |
2709 | mmc_bus_put(host); | |
2710 | ||
2711 | mmc_power_off(host); | |
12ae637f OBC |
2712 | |
2713 | return ret; | |
eae1aeee AH |
2714 | } |
2715 | EXPORT_SYMBOL(mmc_power_save_host); | |
2716 | ||
12ae637f | 2717 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2718 | { |
12ae637f OBC |
2719 | int ret; |
2720 | ||
bb9cab94 DD |
2721 | #ifdef CONFIG_MMC_DEBUG |
2722 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); | |
2723 | #endif | |
2724 | ||
eae1aeee AH |
2725 | mmc_bus_get(host); |
2726 | ||
5601aaf7 | 2727 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2728 | mmc_bus_put(host); |
12ae637f | 2729 | return -EINVAL; |
eae1aeee AH |
2730 | } |
2731 | ||
69041150 | 2732 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2733 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2734 | |
2735 | mmc_bus_put(host); | |
12ae637f OBC |
2736 | |
2737 | return ret; | |
eae1aeee AH |
2738 | } |
2739 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2740 | ||
881d1c25 SJ |
2741 | /* |
2742 | * Flush the cache to the non-volatile storage. | |
2743 | */ | |
2744 | int mmc_flush_cache(struct mmc_card *card) | |
2745 | { | |
881d1c25 SJ |
2746 | int err = 0; |
2747 | ||
881d1c25 SJ |
2748 | if (mmc_card_mmc(card) && |
2749 | (card->ext_csd.cache_size > 0) && | |
2750 | (card->ext_csd.cache_ctrl & 1)) { | |
2751 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
2752 | EXT_CSD_FLUSH_CACHE, 1, 0); | |
2753 | if (err) | |
2754 | pr_err("%s: cache flush error %d\n", | |
2755 | mmc_hostname(card->host), err); | |
2756 | } | |
2757 | ||
2758 | return err; | |
2759 | } | |
2760 | EXPORT_SYMBOL(mmc_flush_cache); | |
2761 | ||
1da177e4 LT |
2762 | #ifdef CONFIG_PM |
2763 | ||
4c2ef25f ML |
2764 | /* Do the card removal on suspend if card is assumed removeable |
2765 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2766 | to sync the card. | |
2767 | */ | |
2768 | int mmc_pm_notify(struct notifier_block *notify_block, | |
2769 | unsigned long mode, void *unused) | |
2770 | { | |
2771 | struct mmc_host *host = container_of( | |
2772 | notify_block, struct mmc_host, pm_notify); | |
2773 | unsigned long flags; | |
810caddb | 2774 | int err = 0; |
4c2ef25f ML |
2775 | |
2776 | switch (mode) { | |
2777 | case PM_HIBERNATION_PREPARE: | |
2778 | case PM_SUSPEND_PREPARE: | |
184af16b | 2779 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2780 | spin_lock_irqsave(&host->lock, flags); |
2781 | host->rescan_disable = 1; | |
2782 | spin_unlock_irqrestore(&host->lock, flags); | |
2783 | cancel_delayed_work_sync(&host->detect); | |
2784 | ||
810caddb UH |
2785 | if (!host->bus_ops) |
2786 | break; | |
2787 | ||
2788 | /* Validate prerequisites for suspend */ | |
2789 | if (host->bus_ops->pre_suspend) | |
2790 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2791 | if (!err) |
4c2ef25f ML |
2792 | break; |
2793 | ||
0db13fc2 | 2794 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2795 | host->bus_ops->remove(host); |
0db13fc2 | 2796 | mmc_claim_host(host); |
4c2ef25f | 2797 | mmc_detach_bus(host); |
7f7e4129 | 2798 | mmc_power_off(host); |
4c2ef25f ML |
2799 | mmc_release_host(host); |
2800 | host->pm_flags = 0; | |
2801 | break; | |
2802 | ||
2803 | case PM_POST_SUSPEND: | |
2804 | case PM_POST_HIBERNATION: | |
274476f8 | 2805 | case PM_POST_RESTORE: |
4c2ef25f ML |
2806 | |
2807 | spin_lock_irqsave(&host->lock, flags); | |
2808 | host->rescan_disable = 0; | |
2809 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2810 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2811 | |
2812 | } | |
2813 | ||
2814 | return 0; | |
2815 | } | |
1da177e4 LT |
2816 | #endif |
2817 | ||
2220eedf KD |
2818 | /** |
2819 | * mmc_init_context_info() - init synchronization context | |
2820 | * @host: mmc host | |
2821 | * | |
2822 | * Init struct context_info needed to implement asynchronous | |
2823 | * request mechanism, used by mmc core, host driver and mmc requests | |
2824 | * supplier. | |
2825 | */ | |
2826 | void mmc_init_context_info(struct mmc_host *host) | |
2827 | { | |
2828 | spin_lock_init(&host->context_info.lock); | |
2829 | host->context_info.is_new_req = false; | |
2830 | host->context_info.is_done_rcv = false; | |
2831 | host->context_info.is_waiting_last_req = false; | |
2832 | init_waitqueue_head(&host->context_info.wait); | |
2833 | } | |
2834 | ||
ffce2e7e PO |
2835 | static int __init mmc_init(void) |
2836 | { | |
2837 | int ret; | |
2838 | ||
0d9ee5b2 | 2839 | workqueue = alloc_ordered_workqueue("kmmcd", 0); |
ffce2e7e PO |
2840 | if (!workqueue) |
2841 | return -ENOMEM; | |
2842 | ||
2843 | ret = mmc_register_bus(); | |
e29a7d73 PO |
2844 | if (ret) |
2845 | goto destroy_workqueue; | |
2846 | ||
2847 | ret = mmc_register_host_class(); | |
2848 | if (ret) | |
2849 | goto unregister_bus; | |
2850 | ||
2851 | ret = sdio_register_bus(); | |
2852 | if (ret) | |
2853 | goto unregister_host_class; | |
2854 | ||
2855 | return 0; | |
2856 | ||
2857 | unregister_host_class: | |
2858 | mmc_unregister_host_class(); | |
2859 | unregister_bus: | |
2860 | mmc_unregister_bus(); | |
2861 | destroy_workqueue: | |
2862 | destroy_workqueue(workqueue); | |
2863 | ||
ffce2e7e PO |
2864 | return ret; |
2865 | } | |
2866 | ||
2867 | static void __exit mmc_exit(void) | |
2868 | { | |
e29a7d73 | 2869 | sdio_unregister_bus(); |
ffce2e7e PO |
2870 | mmc_unregister_host_class(); |
2871 | mmc_unregister_bus(); | |
2872 | destroy_workqueue(workqueue); | |
2873 | } | |
2874 | ||
26074962 | 2875 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2876 | module_exit(mmc_exit); |
2877 | ||
1da177e4 | 2878 | MODULE_LICENSE("GPL"); |