Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
aaac1b47 | 2 | * linux/drivers/mmc/core/core.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. | |
5b4fd9ae | 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
ad3868b2 | 6 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
bce40a36 | 7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/err.h> | |
af8350c7 | 21 | #include <linux/leds.h> |
b57c43ad | 22 | #include <linux/scatterlist.h> |
86e8286a | 23 | #include <linux/log2.h> |
5c13941a | 24 | #include <linux/regulator/consumer.h> |
e594573d | 25 | #include <linux/pm_runtime.h> |
bbd43682 | 26 | #include <linux/pm_wakeup.h> |
35eb6db1 | 27 | #include <linux/suspend.h> |
1b676f70 PF |
28 | #include <linux/fault-inject.h> |
29 | #include <linux/random.h> | |
950d56ac | 30 | #include <linux/slab.h> |
6e9e318b | 31 | #include <linux/of.h> |
1da177e4 LT |
32 | |
33 | #include <linux/mmc/card.h> | |
34 | #include <linux/mmc/host.h> | |
da7fbe58 PO |
35 | #include <linux/mmc/mmc.h> |
36 | #include <linux/mmc/sd.h> | |
740a221e | 37 | #include <linux/mmc/slot-gpio.h> |
1da177e4 | 38 | |
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); | |
04566831 | 190 | |
08c14071 | 191 | mmc_host_clk_release(host); |
1da177e4 LT |
192 | } |
193 | } | |
194 | ||
195 | EXPORT_SYMBOL(mmc_request_done); | |
196 | ||
90a81489 AH |
197 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
198 | { | |
199 | int err; | |
200 | ||
201 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ | |
202 | err = mmc_retune(host); | |
203 | if (err) { | |
204 | mrq->cmd->error = err; | |
205 | mmc_request_done(host, mrq); | |
206 | return; | |
207 | } | |
208 | ||
209 | host->ops->request(host, mrq); | |
210 | } | |
211 | ||
f100c1c2 | 212 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
1da177e4 | 213 | { |
976d9276 PO |
214 | #ifdef CONFIG_MMC_DEBUG |
215 | unsigned int i, sz; | |
a84756c5 | 216 | struct scatterlist *sg; |
976d9276 | 217 | #endif |
90a81489 AH |
218 | mmc_retune_hold(host); |
219 | ||
f100c1c2 AH |
220 | if (mmc_card_removed(host->card)) |
221 | return -ENOMEDIUM; | |
976d9276 | 222 | |
7b2fd4f2 JC |
223 | if (mrq->sbc) { |
224 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
225 | mmc_hostname(host), mrq->sbc->opcode, | |
226 | mrq->sbc->arg, mrq->sbc->flags); | |
227 | } | |
228 | ||
920e70c5 RK |
229 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
230 | mmc_hostname(host), mrq->cmd->opcode, | |
231 | mrq->cmd->arg, mrq->cmd->flags); | |
1da177e4 | 232 | |
e4d21708 PO |
233 | if (mrq->data) { |
234 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
235 | "tsac %d ms nsac %d\n", | |
236 | mmc_hostname(host), mrq->data->blksz, | |
237 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 238 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
239 | mrq->data->timeout_clks); |
240 | } | |
241 | ||
242 | if (mrq->stop) { | |
243 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
244 | mmc_hostname(host), mrq->stop->opcode, | |
245 | mrq->stop->arg, mrq->stop->flags); | |
246 | } | |
247 | ||
f22ee4ed | 248 | WARN_ON(!host->claimed); |
1da177e4 LT |
249 | |
250 | mrq->cmd->error = 0; | |
251 | mrq->cmd->mrq = mrq; | |
cce411e6 AG |
252 | if (mrq->sbc) { |
253 | mrq->sbc->error = 0; | |
254 | mrq->sbc->mrq = mrq; | |
255 | } | |
1da177e4 | 256 | if (mrq->data) { |
fe4a3c7a | 257 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
55db890a PO |
258 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
259 | BUG_ON(mrq->data->blocks * mrq->data->blksz > | |
260 | host->max_req_size); | |
fe4a3c7a | 261 | |
976d9276 PO |
262 | #ifdef CONFIG_MMC_DEBUG |
263 | sz = 0; | |
a84756c5 PO |
264 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
265 | sz += sg->length; | |
976d9276 PO |
266 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
267 | #endif | |
268 | ||
1da177e4 LT |
269 | mrq->cmd->data = mrq->data; |
270 | mrq->data->error = 0; | |
271 | mrq->data->mrq = mrq; | |
272 | if (mrq->stop) { | |
273 | mrq->data->stop = mrq->stop; | |
274 | mrq->stop->error = 0; | |
275 | mrq->stop->mrq = mrq; | |
276 | } | |
277 | } | |
08c14071 | 278 | mmc_host_clk_hold(host); |
66c036e0 | 279 | led_trigger_event(host->led, LED_FULL); |
90a81489 | 280 | __mmc_start_request(host, mrq); |
f100c1c2 AH |
281 | |
282 | return 0; | |
1da177e4 LT |
283 | } |
284 | ||
950d56ac JC |
285 | /** |
286 | * mmc_start_bkops - start BKOPS for supported cards | |
287 | * @card: MMC card to start BKOPS | |
288 | * @form_exception: A flag to indicate if this function was | |
289 | * called due to an exception raised by the card | |
290 | * | |
291 | * Start background operations whenever requested. | |
292 | * When the urgent BKOPS bit is set in a R1 command response | |
293 | * then background operations should be started immediately. | |
294 | */ | |
295 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) | |
296 | { | |
297 | int err; | |
298 | int timeout; | |
299 | bool use_busy_signal; | |
300 | ||
301 | BUG_ON(!card); | |
302 | ||
0501be64 | 303 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
950d56ac JC |
304 | return; |
305 | ||
306 | err = mmc_read_bkops_status(card); | |
307 | if (err) { | |
308 | pr_err("%s: Failed to read bkops status: %d\n", | |
309 | mmc_hostname(card->host), err); | |
310 | return; | |
311 | } | |
312 | ||
313 | if (!card->ext_csd.raw_bkops_status) | |
314 | return; | |
315 | ||
316 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && | |
317 | from_exception) | |
318 | return; | |
319 | ||
320 | mmc_claim_host(card->host); | |
321 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { | |
322 | timeout = MMC_BKOPS_MAX_TIMEOUT; | |
323 | use_busy_signal = true; | |
324 | } else { | |
325 | timeout = 0; | |
326 | use_busy_signal = false; | |
327 | } | |
328 | ||
66073d86 AH |
329 | mmc_retune_hold(card->host); |
330 | ||
950d56ac | 331 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
4509f847 UH |
332 | EXT_CSD_BKOPS_START, 1, timeout, |
333 | use_busy_signal, true, false); | |
950d56ac JC |
334 | if (err) { |
335 | pr_warn("%s: Error %d starting bkops\n", | |
336 | mmc_hostname(card->host), err); | |
66073d86 | 337 | mmc_retune_release(card->host); |
950d56ac JC |
338 | goto out; |
339 | } | |
340 | ||
341 | /* | |
342 | * For urgent bkops status (LEVEL_2 and more) | |
343 | * bkops executed synchronously, otherwise | |
344 | * the operation is in progress | |
345 | */ | |
346 | if (!use_busy_signal) | |
347 | mmc_card_set_doing_bkops(card); | |
66073d86 AH |
348 | else |
349 | mmc_retune_release(card->host); | |
950d56ac JC |
350 | out: |
351 | mmc_release_host(card->host); | |
352 | } | |
353 | EXPORT_SYMBOL(mmc_start_bkops); | |
354 | ||
2220eedf KD |
355 | /* |
356 | * mmc_wait_data_done() - done callback for data request | |
357 | * @mrq: done data request | |
358 | * | |
359 | * Wakes up mmc context, passed as a callback to host controller driver | |
360 | */ | |
361 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
362 | { | |
71f8a4b8 JF |
363 | struct mmc_context_info *context_info = &mrq->host->context_info; |
364 | ||
365 | context_info->is_done_rcv = true; | |
366 | wake_up_interruptible(&context_info->wait); | |
2220eedf KD |
367 | } |
368 | ||
1da177e4 LT |
369 | static void mmc_wait_done(struct mmc_request *mrq) |
370 | { | |
aa8b683a PF |
371 | complete(&mrq->completion); |
372 | } | |
373 | ||
2220eedf KD |
374 | /* |
375 | *__mmc_start_data_req() - starts data request | |
376 | * @host: MMC host to start the request | |
377 | * @mrq: data request to start | |
378 | * | |
379 | * Sets the done callback to be called when request is completed by the card. | |
380 | * Starts data mmc request execution | |
381 | */ | |
382 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
383 | { | |
f100c1c2 AH |
384 | int err; |
385 | ||
2220eedf KD |
386 | mrq->done = mmc_wait_data_done; |
387 | mrq->host = host; | |
f100c1c2 AH |
388 | |
389 | err = mmc_start_request(host, mrq); | |
390 | if (err) { | |
391 | mrq->cmd->error = err; | |
9b844961 | 392 | mmc_wait_data_done(mrq); |
2220eedf | 393 | } |
2220eedf | 394 | |
f100c1c2 | 395 | return err; |
2220eedf KD |
396 | } |
397 | ||
956d9fd5 | 398 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a | 399 | { |
f100c1c2 AH |
400 | int err; |
401 | ||
aa8b683a PF |
402 | init_completion(&mrq->completion); |
403 | mrq->done = mmc_wait_done; | |
f100c1c2 AH |
404 | |
405 | err = mmc_start_request(host, mrq); | |
406 | if (err) { | |
407 | mrq->cmd->error = err; | |
d3049504 | 408 | complete(&mrq->completion); |
d3049504 | 409 | } |
f100c1c2 AH |
410 | |
411 | return err; | |
aa8b683a PF |
412 | } |
413 | ||
2220eedf KD |
414 | /* |
415 | * mmc_wait_for_data_req_done() - wait for request completed | |
416 | * @host: MMC host to prepare the command. | |
417 | * @mrq: MMC request to wait for | |
418 | * | |
419 | * Blocks MMC context till host controller will ack end of data request | |
420 | * execution or new request notification arrives from the block layer. | |
421 | * Handles command retries. | |
422 | * | |
423 | * Returns enum mmc_blk_status after checking errors. | |
424 | */ | |
425 | static int mmc_wait_for_data_req_done(struct mmc_host *host, | |
426 | struct mmc_request *mrq, | |
427 | struct mmc_async_req *next_req) | |
428 | { | |
429 | struct mmc_command *cmd; | |
430 | struct mmc_context_info *context_info = &host->context_info; | |
431 | int err; | |
432 | unsigned long flags; | |
433 | ||
434 | while (1) { | |
435 | wait_event_interruptible(context_info->wait, | |
436 | (context_info->is_done_rcv || | |
437 | context_info->is_new_req)); | |
438 | spin_lock_irqsave(&context_info->lock, flags); | |
439 | context_info->is_waiting_last_req = false; | |
440 | spin_unlock_irqrestore(&context_info->lock, flags); | |
441 | if (context_info->is_done_rcv) { | |
442 | context_info->is_done_rcv = false; | |
443 | context_info->is_new_req = false; | |
444 | cmd = mrq->cmd; | |
775a9362 | 445 | |
2220eedf KD |
446 | if (!cmd->error || !cmd->retries || |
447 | mmc_card_removed(host->card)) { | |
448 | err = host->areq->err_check(host->card, | |
449 | host->areq); | |
450 | break; /* return err */ | |
451 | } else { | |
90a81489 | 452 | mmc_retune_recheck(host); |
2220eedf KD |
453 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
454 | mmc_hostname(host), | |
455 | cmd->opcode, cmd->error); | |
456 | cmd->retries--; | |
457 | cmd->error = 0; | |
90a81489 | 458 | __mmc_start_request(host, mrq); |
2220eedf KD |
459 | continue; /* wait for done/new event again */ |
460 | } | |
461 | } else if (context_info->is_new_req) { | |
462 | context_info->is_new_req = false; | |
90a81489 AH |
463 | if (!next_req) |
464 | return MMC_BLK_NEW_REQUEST; | |
2220eedf KD |
465 | } |
466 | } | |
90a81489 | 467 | mmc_retune_release(host); |
2220eedf KD |
468 | return err; |
469 | } | |
470 | ||
aa8b683a PF |
471 | static void mmc_wait_for_req_done(struct mmc_host *host, |
472 | struct mmc_request *mrq) | |
473 | { | |
08a7e1df AH |
474 | struct mmc_command *cmd; |
475 | ||
476 | while (1) { | |
477 | wait_for_completion(&mrq->completion); | |
478 | ||
479 | cmd = mrq->cmd; | |
775a9362 ME |
480 | |
481 | /* | |
482 | * If host has timed out waiting for the sanitize | |
483 | * to complete, card might be still in programming state | |
484 | * so let's try to bring the card out of programming | |
485 | * state. | |
486 | */ | |
487 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
488 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
489 | pr_warn("%s: %s: Interrupted sanitize\n", |
490 | mmc_hostname(host), __func__); | |
775a9362 ME |
491 | cmd->error = 0; |
492 | break; | |
493 | } else { | |
494 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
495 | mmc_hostname(host), __func__); | |
496 | } | |
497 | } | |
d3049504 AH |
498 | if (!cmd->error || !cmd->retries || |
499 | mmc_card_removed(host->card)) | |
08a7e1df AH |
500 | break; |
501 | ||
90a81489 AH |
502 | mmc_retune_recheck(host); |
503 | ||
08a7e1df AH |
504 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
505 | mmc_hostname(host), cmd->opcode, cmd->error); | |
506 | cmd->retries--; | |
507 | cmd->error = 0; | |
90a81489 | 508 | __mmc_start_request(host, mrq); |
08a7e1df | 509 | } |
90a81489 AH |
510 | |
511 | mmc_retune_release(host); | |
aa8b683a PF |
512 | } |
513 | ||
514 | /** | |
515 | * mmc_pre_req - Prepare for a new request | |
516 | * @host: MMC host to prepare command | |
517 | * @mrq: MMC request to prepare for | |
518 | * @is_first_req: true if there is no previous started request | |
519 | * that may run in parellel to this call, otherwise false | |
520 | * | |
521 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
522 | * host prepare for the new request. Preparation of a request may be | |
523 | * performed while another request is running on the host. | |
524 | */ | |
525 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, | |
526 | bool is_first_req) | |
527 | { | |
2c4967f7 SRT |
528 | if (host->ops->pre_req) { |
529 | mmc_host_clk_hold(host); | |
aa8b683a | 530 | host->ops->pre_req(host, mrq, is_first_req); |
2c4967f7 SRT |
531 | mmc_host_clk_release(host); |
532 | } | |
aa8b683a PF |
533 | } |
534 | ||
535 | /** | |
536 | * mmc_post_req - Post process a completed request | |
537 | * @host: MMC host to post process command | |
538 | * @mrq: MMC request to post process for | |
539 | * @err: Error, if non zero, clean up any resources made in pre_req | |
540 | * | |
541 | * Let the host post process a completed request. Post processing of | |
542 | * a request may be performed while another reuqest is running. | |
543 | */ | |
544 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
545 | int err) | |
546 | { | |
2c4967f7 SRT |
547 | if (host->ops->post_req) { |
548 | mmc_host_clk_hold(host); | |
aa8b683a | 549 | host->ops->post_req(host, mrq, err); |
2c4967f7 SRT |
550 | mmc_host_clk_release(host); |
551 | } | |
1da177e4 LT |
552 | } |
553 | ||
aa8b683a PF |
554 | /** |
555 | * mmc_start_req - start a non-blocking request | |
556 | * @host: MMC host to start command | |
557 | * @areq: async request to start | |
558 | * @error: out parameter returns 0 for success, otherwise non zero | |
559 | * | |
560 | * Start a new MMC custom command request for a host. | |
561 | * If there is on ongoing async request wait for completion | |
562 | * of that request and start the new one and return. | |
563 | * Does not wait for the new request to complete. | |
564 | * | |
565 | * Returns the completed request, NULL in case of none completed. | |
566 | * Wait for the an ongoing request (previoulsy started) to complete and | |
567 | * return the completed request. If there is no ongoing request, NULL | |
568 | * is returned without waiting. NULL is not an error condition. | |
569 | */ | |
570 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, | |
571 | struct mmc_async_req *areq, int *error) | |
572 | { | |
573 | int err = 0; | |
956d9fd5 | 574 | int start_err = 0; |
aa8b683a PF |
575 | struct mmc_async_req *data = host->areq; |
576 | ||
577 | /* Prepare a new request */ | |
578 | if (areq) | |
579 | mmc_pre_req(host, areq->mrq, !host->areq); | |
580 | ||
581 | if (host->areq) { | |
f5c2758f JC |
582 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
583 | if (err == MMC_BLK_NEW_REQUEST) { | |
584 | if (error) | |
585 | *error = err; | |
586 | /* | |
587 | * The previous request was not completed, | |
588 | * nothing to return | |
589 | */ | |
590 | return NULL; | |
591 | } | |
950d56ac JC |
592 | /* |
593 | * Check BKOPS urgency for each R1 response | |
594 | */ | |
595 | if (host->card && mmc_card_mmc(host->card) && | |
596 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
597 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
64b12a68 SK |
598 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
599 | ||
600 | /* Cancel the prepared request */ | |
601 | if (areq) | |
602 | mmc_post_req(host, areq->mrq, -EINVAL); | |
603 | ||
950d56ac | 604 | mmc_start_bkops(host->card, true); |
64b12a68 SK |
605 | |
606 | /* prepare the request again */ | |
607 | if (areq) | |
608 | mmc_pre_req(host, areq->mrq, !host->areq); | |
609 | } | |
aa8b683a PF |
610 | } |
611 | ||
956d9fd5 | 612 | if (!err && areq) |
2220eedf | 613 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a PF |
614 | |
615 | if (host->areq) | |
616 | mmc_post_req(host, host->areq->mrq, 0); | |
617 | ||
956d9fd5 UH |
618 | /* Cancel a prepared request if it was not started. */ |
619 | if ((err || start_err) && areq) | |
f5c2758f | 620 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 UH |
621 | |
622 | if (err) | |
623 | host->areq = NULL; | |
624 | else | |
625 | host->areq = areq; | |
626 | ||
aa8b683a PF |
627 | if (error) |
628 | *error = err; | |
629 | return data; | |
630 | } | |
631 | EXPORT_SYMBOL(mmc_start_req); | |
632 | ||
67a61c48 PO |
633 | /** |
634 | * mmc_wait_for_req - start a request and wait for completion | |
635 | * @host: MMC host to start command | |
636 | * @mrq: MMC request to start | |
637 | * | |
638 | * Start a new MMC custom command request for a host, and wait | |
639 | * for the command to complete. Does not attempt to parse the | |
640 | * response. | |
641 | */ | |
642 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 643 | { |
aa8b683a PF |
644 | __mmc_start_req(host, mrq); |
645 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 646 | } |
1da177e4 LT |
647 | EXPORT_SYMBOL(mmc_wait_for_req); |
648 | ||
eb0d8f13 JC |
649 | /** |
650 | * mmc_interrupt_hpi - Issue for High priority Interrupt | |
651 | * @card: the MMC card associated with the HPI transfer | |
652 | * | |
653 | * Issued High Priority Interrupt, and check for card status | |
950d56ac | 654 | * until out-of prg-state. |
eb0d8f13 JC |
655 | */ |
656 | int mmc_interrupt_hpi(struct mmc_card *card) | |
657 | { | |
658 | int err; | |
659 | u32 status; | |
6af9e96e | 660 | unsigned long prg_wait; |
eb0d8f13 JC |
661 | |
662 | BUG_ON(!card); | |
663 | ||
664 | if (!card->ext_csd.hpi_en) { | |
665 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); | |
666 | return 1; | |
667 | } | |
668 | ||
669 | mmc_claim_host(card->host); | |
670 | err = mmc_send_status(card, &status); | |
671 | if (err) { | |
672 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); | |
673 | goto out; | |
674 | } | |
675 | ||
6af9e96e V |
676 | switch (R1_CURRENT_STATE(status)) { |
677 | case R1_STATE_IDLE: | |
678 | case R1_STATE_READY: | |
679 | case R1_STATE_STBY: | |
211d4fe5 | 680 | case R1_STATE_TRAN: |
6af9e96e | 681 | /* |
211d4fe5 | 682 | * In idle and transfer states, HPI is not needed and the caller |
6af9e96e V |
683 | * can issue the next intended command immediately |
684 | */ | |
685 | goto out; | |
686 | case R1_STATE_PRG: | |
687 | break; | |
688 | default: | |
689 | /* In all other states, it's illegal to issue HPI */ | |
690 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", | |
691 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); | |
692 | err = -EINVAL; | |
693 | goto out; | |
694 | } | |
695 | ||
696 | err = mmc_send_hpi_cmd(card, &status); | |
697 | if (err) | |
698 | goto out; | |
699 | ||
700 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); | |
701 | do { | |
702 | err = mmc_send_status(card, &status); | |
703 | ||
704 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) | |
705 | break; | |
706 | if (time_after(jiffies, prg_wait)) | |
707 | err = -ETIMEDOUT; | |
708 | } while (!err); | |
eb0d8f13 JC |
709 | |
710 | out: | |
711 | mmc_release_host(card->host); | |
712 | return err; | |
713 | } | |
714 | EXPORT_SYMBOL(mmc_interrupt_hpi); | |
715 | ||
1da177e4 LT |
716 | /** |
717 | * mmc_wait_for_cmd - start a command and wait for completion | |
718 | * @host: MMC host to start command | |
719 | * @cmd: MMC command to start | |
720 | * @retries: maximum number of retries | |
721 | * | |
722 | * Start a new MMC command for a host, and wait for the command | |
723 | * to complete. Return any error that occurred while the command | |
724 | * was executing. Do not attempt to parse the response. | |
725 | */ | |
726 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
727 | { | |
ad5fd972 | 728 | struct mmc_request mrq = {NULL}; |
1da177e4 | 729 | |
d84075c8 | 730 | WARN_ON(!host->claimed); |
1da177e4 | 731 | |
1da177e4 LT |
732 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
733 | cmd->retries = retries; | |
734 | ||
735 | mrq.cmd = cmd; | |
736 | cmd->data = NULL; | |
737 | ||
738 | mmc_wait_for_req(host, &mrq); | |
739 | ||
740 | return cmd->error; | |
741 | } | |
742 | ||
743 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
744 | ||
950d56ac JC |
745 | /** |
746 | * mmc_stop_bkops - stop ongoing BKOPS | |
747 | * @card: MMC card to check BKOPS | |
748 | * | |
749 | * Send HPI command to stop ongoing background operations to | |
750 | * allow rapid servicing of foreground operations, e.g. read/ | |
751 | * writes. Wait until the card comes out of the programming state | |
752 | * to avoid errors in servicing read/write requests. | |
753 | */ | |
754 | int mmc_stop_bkops(struct mmc_card *card) | |
755 | { | |
756 | int err = 0; | |
757 | ||
758 | BUG_ON(!card); | |
759 | err = mmc_interrupt_hpi(card); | |
760 | ||
761 | /* | |
762 | * If err is EINVAL, we can't issue an HPI. | |
763 | * It should complete the BKOPS. | |
764 | */ | |
765 | if (!err || (err == -EINVAL)) { | |
766 | mmc_card_clr_doing_bkops(card); | |
66073d86 | 767 | mmc_retune_release(card->host); |
950d56ac JC |
768 | err = 0; |
769 | } | |
770 | ||
771 | return err; | |
772 | } | |
773 | EXPORT_SYMBOL(mmc_stop_bkops); | |
774 | ||
775 | int mmc_read_bkops_status(struct mmc_card *card) | |
776 | { | |
777 | int err; | |
778 | u8 *ext_csd; | |
779 | ||
950d56ac | 780 | mmc_claim_host(card->host); |
b2cada73 | 781 | err = mmc_get_ext_csd(card, &ext_csd); |
950d56ac JC |
782 | mmc_release_host(card->host); |
783 | if (err) | |
b2cada73 | 784 | return err; |
950d56ac JC |
785 | |
786 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; | |
787 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; | |
950d56ac | 788 | kfree(ext_csd); |
b2cada73 | 789 | return 0; |
950d56ac JC |
790 | } |
791 | EXPORT_SYMBOL(mmc_read_bkops_status); | |
792 | ||
d773d725 RK |
793 | /** |
794 | * mmc_set_data_timeout - set the timeout for a data command | |
795 | * @data: data phase for command | |
796 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
797 | * |
798 | * Computes the data timeout parameters according to the | |
799 | * correct algorithm given the card type. | |
d773d725 | 800 | */ |
b146d26a | 801 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
802 | { |
803 | unsigned int mult; | |
804 | ||
e6f918bf PO |
805 | /* |
806 | * SDIO cards only define an upper 1 s limit on access. | |
807 | */ | |
808 | if (mmc_card_sdio(card)) { | |
809 | data->timeout_ns = 1000000000; | |
810 | data->timeout_clks = 0; | |
811 | return; | |
812 | } | |
813 | ||
d773d725 RK |
814 | /* |
815 | * SD cards use a 100 multiplier rather than 10 | |
816 | */ | |
817 | mult = mmc_card_sd(card) ? 100 : 10; | |
818 | ||
819 | /* | |
820 | * Scale up the multiplier (and therefore the timeout) by | |
821 | * the r2w factor for writes. | |
822 | */ | |
b146d26a | 823 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
824 | mult <<= card->csd.r2w_factor; |
825 | ||
826 | data->timeout_ns = card->csd.tacc_ns * mult; | |
827 | data->timeout_clks = card->csd.tacc_clks * mult; | |
828 | ||
829 | /* | |
830 | * SD cards also have an upper limit on the timeout. | |
831 | */ | |
832 | if (mmc_card_sd(card)) { | |
833 | unsigned int timeout_us, limit_us; | |
834 | ||
835 | timeout_us = data->timeout_ns / 1000; | |
e9b86841 LW |
836 | if (mmc_host_clk_rate(card->host)) |
837 | timeout_us += data->timeout_clks * 1000 / | |
838 | (mmc_host_clk_rate(card->host) / 1000); | |
d773d725 | 839 | |
b146d26a | 840 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 841 | /* |
3bdc9ba8 PW |
842 | * The MMC spec "It is strongly recommended |
843 | * for hosts to implement more than 500ms | |
844 | * timeout value even if the card indicates | |
845 | * the 250ms maximum busy length." Even the | |
846 | * previous value of 300ms is known to be | |
847 | * insufficient for some cards. | |
493890e7 | 848 | */ |
3bdc9ba8 | 849 | limit_us = 3000000; |
d773d725 RK |
850 | else |
851 | limit_us = 100000; | |
852 | ||
fba68bd2 PL |
853 | /* |
854 | * SDHC cards always use these fixed values. | |
855 | */ | |
856 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
857 | data->timeout_ns = limit_us * 1000; |
858 | data->timeout_clks = 0; | |
859 | } | |
f7bf11a3 SW |
860 | |
861 | /* assign limit value if invalid */ | |
862 | if (timeout_us == 0) | |
863 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 864 | } |
6de5fc9c SNX |
865 | |
866 | /* | |
867 | * Some cards require longer data read timeout than indicated in CSD. | |
868 | * Address this by setting the read timeout to a "reasonably high" | |
869 | * value. For the cards tested, 300ms has proven enough. If necessary, | |
870 | * this value can be increased if other problematic cards require this. | |
871 | */ | |
872 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
873 | data->timeout_ns = 300000000; | |
874 | data->timeout_clks = 0; | |
875 | } | |
876 | ||
c0c88871 WM |
877 | /* |
878 | * Some cards need very high timeouts if driven in SPI mode. | |
879 | * The worst observed timeout was 900ms after writing a | |
880 | * continuous stream of data until the internal logic | |
881 | * overflowed. | |
882 | */ | |
883 | if (mmc_host_is_spi(card->host)) { | |
884 | if (data->flags & MMC_DATA_WRITE) { | |
885 | if (data->timeout_ns < 1000000000) | |
886 | data->timeout_ns = 1000000000; /* 1s */ | |
887 | } else { | |
888 | if (data->timeout_ns < 100000000) | |
889 | data->timeout_ns = 100000000; /* 100ms */ | |
890 | } | |
891 | } | |
d773d725 RK |
892 | } |
893 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
894 | ||
ad3868b2 PO |
895 | /** |
896 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
897 | * @card: the MMC card associated with the data transfer | |
898 | * @sz: original transfer size | |
899 | * | |
900 | * Pads the original data size with a number of extra bytes in | |
901 | * order to avoid controller bugs and/or performance hits | |
902 | * (e.g. some controllers revert to PIO for certain sizes). | |
903 | * | |
904 | * Returns the improved size, which might be unmodified. | |
905 | * | |
906 | * Note that this function is only relevant when issuing a | |
907 | * single scatter gather entry. | |
908 | */ | |
909 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
910 | { | |
911 | /* | |
912 | * FIXME: We don't have a system for the controller to tell | |
913 | * the core about its problems yet, so for now we just 32-bit | |
914 | * align the size. | |
915 | */ | |
916 | sz = ((sz + 3) / 4) * 4; | |
917 | ||
918 | return sz; | |
919 | } | |
920 | EXPORT_SYMBOL(mmc_align_data_size); | |
921 | ||
1da177e4 | 922 | /** |
2342f332 | 923 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 924 | * @host: mmc host to claim |
2342f332 | 925 | * @abort: whether or not the operation should be aborted |
1da177e4 | 926 | * |
2342f332 NP |
927 | * Claim a host for a set of operations. If @abort is non null and |
928 | * dereference a non-zero value then this will return prematurely with | |
929 | * that non-zero value without acquiring the lock. Returns zero | |
930 | * with the lock held otherwise. | |
1da177e4 | 931 | */ |
2342f332 | 932 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
933 | { |
934 | DECLARE_WAITQUEUE(wait, current); | |
935 | unsigned long flags; | |
2342f332 | 936 | int stop; |
9250aea7 | 937 | bool pm = false; |
1da177e4 | 938 | |
cf795bfb PO |
939 | might_sleep(); |
940 | ||
1da177e4 LT |
941 | add_wait_queue(&host->wq, &wait); |
942 | spin_lock_irqsave(&host->lock, flags); | |
943 | while (1) { | |
944 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 945 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 946 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
947 | break; |
948 | spin_unlock_irqrestore(&host->lock, flags); | |
949 | schedule(); | |
950 | spin_lock_irqsave(&host->lock, flags); | |
951 | } | |
952 | set_current_state(TASK_RUNNING); | |
319a3f14 | 953 | if (!stop) { |
2342f332 | 954 | host->claimed = 1; |
319a3f14 AH |
955 | host->claimer = current; |
956 | host->claim_cnt += 1; | |
9250aea7 UH |
957 | if (host->claim_cnt == 1) |
958 | pm = true; | |
319a3f14 | 959 | } else |
2342f332 | 960 | wake_up(&host->wq); |
1da177e4 LT |
961 | spin_unlock_irqrestore(&host->lock, flags); |
962 | remove_wait_queue(&host->wq, &wait); | |
9250aea7 UH |
963 | |
964 | if (pm) | |
965 | pm_runtime_get_sync(mmc_dev(host)); | |
966 | ||
2342f332 | 967 | return stop; |
1da177e4 | 968 | } |
2342f332 | 969 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 970 | |
ab1efd27 | 971 | /** |
907d2e7c | 972 | * mmc_release_host - release a host |
ab1efd27 UH |
973 | * @host: mmc host to release |
974 | * | |
907d2e7c AH |
975 | * Release a MMC host, allowing others to claim the host |
976 | * for their operations. | |
ab1efd27 | 977 | */ |
907d2e7c | 978 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
979 | { |
980 | unsigned long flags; | |
981 | ||
907d2e7c AH |
982 | WARN_ON(!host->claimed); |
983 | ||
8ea926b2 | 984 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
985 | if (--host->claim_cnt) { |
986 | /* Release for nested claim */ | |
987 | spin_unlock_irqrestore(&host->lock, flags); | |
988 | } else { | |
989 | host->claimed = 0; | |
990 | host->claimer = NULL; | |
991 | spin_unlock_irqrestore(&host->lock, flags); | |
992 | wake_up(&host->wq); | |
9250aea7 UH |
993 | pm_runtime_mark_last_busy(mmc_dev(host)); |
994 | pm_runtime_put_autosuspend(mmc_dev(host)); | |
319a3f14 | 995 | } |
8ea926b2 | 996 | } |
1da177e4 LT |
997 | EXPORT_SYMBOL(mmc_release_host); |
998 | ||
e94cfef6 UH |
999 | /* |
1000 | * This is a helper function, which fetches a runtime pm reference for the | |
1001 | * card device and also claims the host. | |
1002 | */ | |
1003 | void mmc_get_card(struct mmc_card *card) | |
1004 | { | |
1005 | pm_runtime_get_sync(&card->dev); | |
1006 | mmc_claim_host(card->host); | |
1007 | } | |
1008 | EXPORT_SYMBOL(mmc_get_card); | |
1009 | ||
1010 | /* | |
1011 | * This is a helper function, which releases the host and drops the runtime | |
1012 | * pm reference for the card device. | |
1013 | */ | |
1014 | void mmc_put_card(struct mmc_card *card) | |
1015 | { | |
1016 | mmc_release_host(card->host); | |
1017 | pm_runtime_mark_last_busy(&card->dev); | |
1018 | pm_runtime_put_autosuspend(&card->dev); | |
1019 | } | |
1020 | EXPORT_SYMBOL(mmc_put_card); | |
1021 | ||
7ea239d9 PO |
1022 | /* |
1023 | * Internal function that does the actual ios call to the host driver, | |
1024 | * optionally printing some debug output. | |
1025 | */ | |
920e70c5 RK |
1026 | static inline void mmc_set_ios(struct mmc_host *host) |
1027 | { | |
1028 | struct mmc_ios *ios = &host->ios; | |
1029 | ||
cd9277c0 PO |
1030 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
1031 | "width %u timing %u\n", | |
920e70c5 RK |
1032 | mmc_hostname(host), ios->clock, ios->bus_mode, |
1033 | ios->power_mode, ios->chip_select, ios->vdd, | |
cd9277c0 | 1034 | ios->bus_width, ios->timing); |
fba68bd2 | 1035 | |
04566831 LW |
1036 | if (ios->clock > 0) |
1037 | mmc_set_ungated(host); | |
920e70c5 RK |
1038 | host->ops->set_ios(host, ios); |
1039 | } | |
1040 | ||
7ea239d9 PO |
1041 | /* |
1042 | * Control chip select pin on a host. | |
1043 | */ | |
da7fbe58 | 1044 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 1045 | { |
778e277c | 1046 | mmc_host_clk_hold(host); |
da7fbe58 PO |
1047 | host->ios.chip_select = mode; |
1048 | mmc_set_ios(host); | |
778e277c | 1049 | mmc_host_clk_release(host); |
1da177e4 LT |
1050 | } |
1051 | ||
7ea239d9 PO |
1052 | /* |
1053 | * Sets the host clock to the highest possible frequency that | |
1054 | * is below "hz". | |
1055 | */ | |
778e277c | 1056 | static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 1057 | { |
6a98f1e8 | 1058 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
1059 | |
1060 | if (hz > host->f_max) | |
1061 | hz = host->f_max; | |
1062 | ||
1063 | host->ios.clock = hz; | |
1064 | mmc_set_ios(host); | |
1065 | } | |
1066 | ||
778e277c MW |
1067 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
1068 | { | |
1069 | mmc_host_clk_hold(host); | |
1070 | __mmc_set_clock(host, hz); | |
1071 | mmc_host_clk_release(host); | |
1072 | } | |
1073 | ||
04566831 LW |
1074 | #ifdef CONFIG_MMC_CLKGATE |
1075 | /* | |
1076 | * This gates the clock by setting it to 0 Hz. | |
1077 | */ | |
1078 | void mmc_gate_clock(struct mmc_host *host) | |
1079 | { | |
1080 | unsigned long flags; | |
1081 | ||
1082 | spin_lock_irqsave(&host->clk_lock, flags); | |
1083 | host->clk_old = host->ios.clock; | |
1084 | host->ios.clock = 0; | |
1085 | host->clk_gated = true; | |
1086 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1087 | mmc_set_ios(host); | |
1088 | } | |
1089 | ||
1090 | /* | |
1091 | * This restores the clock from gating by using the cached | |
1092 | * clock value. | |
1093 | */ | |
1094 | void mmc_ungate_clock(struct mmc_host *host) | |
1095 | { | |
1096 | /* | |
1097 | * We should previously have gated the clock, so the clock shall | |
1098 | * be 0 here! The clock may however be 0 during initialization, | |
1099 | * when some request operations are performed before setting | |
1100 | * the frequency. When ungate is requested in that situation | |
1101 | * we just ignore the call. | |
1102 | */ | |
1103 | if (host->clk_old) { | |
1104 | BUG_ON(host->ios.clock); | |
1105 | /* This call will also set host->clk_gated to false */ | |
778e277c | 1106 | __mmc_set_clock(host, host->clk_old); |
04566831 LW |
1107 | } |
1108 | } | |
1109 | ||
1110 | void mmc_set_ungated(struct mmc_host *host) | |
1111 | { | |
1112 | unsigned long flags; | |
1113 | ||
1114 | /* | |
1115 | * We've been given a new frequency while the clock is gated, | |
1116 | * so make sure we regard this as ungating it. | |
1117 | */ | |
1118 | spin_lock_irqsave(&host->clk_lock, flags); | |
1119 | host->clk_gated = false; | |
1120 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1121 | } | |
1122 | ||
1123 | #else | |
1124 | void mmc_set_ungated(struct mmc_host *host) | |
1125 | { | |
1126 | } | |
1127 | #endif | |
1128 | ||
63e415c6 AH |
1129 | int mmc_execute_tuning(struct mmc_card *card) |
1130 | { | |
1131 | struct mmc_host *host = card->host; | |
1132 | u32 opcode; | |
1133 | int err; | |
1134 | ||
1135 | if (!host->ops->execute_tuning) | |
1136 | return 0; | |
1137 | ||
1138 | if (mmc_card_mmc(card)) | |
1139 | opcode = MMC_SEND_TUNING_BLOCK_HS200; | |
1140 | else | |
1141 | opcode = MMC_SEND_TUNING_BLOCK; | |
1142 | ||
1143 | mmc_host_clk_hold(host); | |
1144 | err = host->ops->execute_tuning(host, opcode); | |
1145 | mmc_host_clk_release(host); | |
1146 | ||
1147 | if (err) | |
1148 | pr_err("%s: tuning execution failed\n", mmc_hostname(host)); | |
79d5a65a AH |
1149 | else |
1150 | mmc_retune_enable(host); | |
63e415c6 AH |
1151 | |
1152 | return err; | |
1153 | } | |
1154 | ||
7ea239d9 PO |
1155 | /* |
1156 | * Change the bus mode (open drain/push-pull) of a host. | |
1157 | */ | |
1158 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1159 | { | |
778e277c | 1160 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1161 | host->ios.bus_mode = mode; |
1162 | mmc_set_ios(host); | |
778e277c | 1163 | mmc_host_clk_release(host); |
7ea239d9 PO |
1164 | } |
1165 | ||
0f8d8ea6 AH |
1166 | /* |
1167 | * Change data bus width of a host. | |
1168 | */ | |
1169 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1170 | { | |
778e277c | 1171 | mmc_host_clk_hold(host); |
4c4cb171 PR |
1172 | host->ios.bus_width = width; |
1173 | mmc_set_ios(host); | |
778e277c | 1174 | mmc_host_clk_release(host); |
0f8d8ea6 AH |
1175 | } |
1176 | ||
2d079c43 JR |
1177 | /* |
1178 | * Set initial state after a power cycle or a hw_reset. | |
1179 | */ | |
1180 | void mmc_set_initial_state(struct mmc_host *host) | |
1181 | { | |
79d5a65a AH |
1182 | mmc_retune_disable(host); |
1183 | ||
2d079c43 JR |
1184 | if (mmc_host_is_spi(host)) |
1185 | host->ios.chip_select = MMC_CS_HIGH; | |
1186 | else | |
1187 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1188 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
1189 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
1190 | host->ios.timing = MMC_TIMING_LEGACY; | |
75e8a228 | 1191 | host->ios.drv_type = 0; |
2d079c43 JR |
1192 | |
1193 | mmc_set_ios(host); | |
1194 | } | |
1195 | ||
86e8286a AV |
1196 | /** |
1197 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1198 | * @vdd: voltage (mV) | |
1199 | * @low_bits: prefer low bits in boundary cases | |
1200 | * | |
1201 | * This function returns the OCR bit number according to the provided @vdd | |
1202 | * value. If conversion is not possible a negative errno value returned. | |
1203 | * | |
1204 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1205 | * on boundary voltages. For example, | |
1206 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1207 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1208 | * | |
1209 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1210 | */ | |
1211 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1212 | { | |
1213 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1214 | int bit; | |
1215 | ||
1216 | if (vdd < 1650 || vdd > 3600) | |
1217 | return -EINVAL; | |
1218 | ||
1219 | if (vdd >= 1650 && vdd <= 1950) | |
1220 | return ilog2(MMC_VDD_165_195); | |
1221 | ||
1222 | if (low_bits) | |
1223 | vdd -= 1; | |
1224 | ||
1225 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1226 | bit = (vdd - 2000) / 100 + 8; | |
1227 | if (bit > max_bit) | |
1228 | return max_bit; | |
1229 | return bit; | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1234 | * @vdd_min: minimum voltage value (mV) | |
1235 | * @vdd_max: maximum voltage value (mV) | |
1236 | * | |
1237 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1238 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1239 | * | |
1240 | * Notes wrt boundary cases: | |
1241 | * This function sets the OCR bits for all boundary voltages, for example | |
1242 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1243 | * MMC_VDD_34_35 mask. | |
1244 | */ | |
1245 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1246 | { | |
1247 | u32 mask = 0; | |
1248 | ||
1249 | if (vdd_max < vdd_min) | |
1250 | return 0; | |
1251 | ||
1252 | /* Prefer high bits for the boundary vdd_max values. */ | |
1253 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1254 | if (vdd_max < 0) | |
1255 | return 0; | |
1256 | ||
1257 | /* Prefer low bits for the boundary vdd_min values. */ | |
1258 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1259 | if (vdd_min < 0) | |
1260 | return 0; | |
1261 | ||
1262 | /* Fill the mask, from max bit to min bit. */ | |
1263 | while (vdd_max >= vdd_min) | |
1264 | mask |= 1 << vdd_max--; | |
1265 | ||
1266 | return mask; | |
1267 | } | |
1268 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1269 | ||
6e9e318b HZ |
1270 | #ifdef CONFIG_OF |
1271 | ||
1272 | /** | |
1273 | * mmc_of_parse_voltage - return mask of supported voltages | |
1274 | * @np: The device node need to be parsed. | |
1275 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1276 | * | |
1277 | * 1. Return zero on success. | |
1278 | * 2. Return negative errno: voltage-range is invalid. | |
1279 | */ | |
1280 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1281 | { | |
1282 | const u32 *voltage_ranges; | |
1283 | int num_ranges, i; | |
1284 | ||
1285 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1286 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
1287 | if (!voltage_ranges || !num_ranges) { | |
1288 | pr_info("%s: voltage-ranges unspecified\n", np->full_name); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | ||
1292 | for (i = 0; i < num_ranges; i++) { | |
1293 | const int j = i * 2; | |
1294 | u32 ocr_mask; | |
1295 | ||
1296 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1297 | be32_to_cpu(voltage_ranges[j]), | |
1298 | be32_to_cpu(voltage_ranges[j + 1])); | |
1299 | if (!ocr_mask) { | |
1300 | pr_err("%s: voltage-range #%d is invalid\n", | |
1301 | np->full_name, i); | |
1302 | return -EINVAL; | |
1303 | } | |
1304 | *mask |= ocr_mask; | |
1305 | } | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1310 | ||
1311 | #endif /* CONFIG_OF */ | |
1312 | ||
25185f3f SH |
1313 | static int mmc_of_get_func_num(struct device_node *node) |
1314 | { | |
1315 | u32 reg; | |
1316 | int ret; | |
1317 | ||
1318 | ret = of_property_read_u32(node, "reg", ®); | |
1319 | if (ret < 0) | |
1320 | return ret; | |
1321 | ||
1322 | return reg; | |
1323 | } | |
1324 | ||
1325 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, | |
1326 | unsigned func_num) | |
1327 | { | |
1328 | struct device_node *node; | |
1329 | ||
1330 | if (!host->parent || !host->parent->of_node) | |
1331 | return NULL; | |
1332 | ||
1333 | for_each_child_of_node(host->parent->of_node, node) { | |
1334 | if (mmc_of_get_func_num(node) == func_num) | |
1335 | return node; | |
1336 | } | |
1337 | ||
1338 | return NULL; | |
1339 | } | |
1340 | ||
5c13941a DB |
1341 | #ifdef CONFIG_REGULATOR |
1342 | ||
1343 | /** | |
1344 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1345 | * @supply: regulator to use | |
1346 | * | |
1347 | * This returns either a negative errno, or a mask of voltages that | |
1348 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1349 | * regulator. This would normally be called before registering the | |
1350 | * MMC host adapter. | |
1351 | */ | |
1352 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1353 | { | |
1354 | int result = 0; | |
1355 | int count; | |
1356 | int i; | |
9ed7ca89 JMC |
1357 | int vdd_uV; |
1358 | int vdd_mV; | |
5c13941a DB |
1359 | |
1360 | count = regulator_count_voltages(supply); | |
1361 | if (count < 0) | |
1362 | return count; | |
1363 | ||
1364 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1365 | vdd_uV = regulator_list_voltage(supply, i); |
1366 | if (vdd_uV <= 0) | |
1367 | continue; | |
1368 | ||
1369 | vdd_mV = vdd_uV / 1000; | |
1370 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1371 | } | |
1372 | ||
9ed7ca89 JMC |
1373 | if (!result) { |
1374 | vdd_uV = regulator_get_voltage(supply); | |
1375 | if (vdd_uV <= 0) | |
1376 | return vdd_uV; | |
1377 | ||
1378 | vdd_mV = vdd_uV / 1000; | |
1379 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1380 | } | |
1381 | ||
5c13941a DB |
1382 | return result; |
1383 | } | |
45a6b32e | 1384 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1385 | |
1386 | /** | |
1387 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1388 | * @mmc: the host to regulate |
5c13941a | 1389 | * @supply: regulator to use |
99fc5131 | 1390 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1391 | * |
1392 | * Returns zero on success, else negative errno. | |
1393 | * | |
1394 | * MMC host drivers may use this to enable or disable a regulator using | |
1395 | * a particular supply voltage. This would normally be called from the | |
1396 | * set_ios() method. | |
1397 | */ | |
99fc5131 LW |
1398 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1399 | struct regulator *supply, | |
1400 | unsigned short vdd_bit) | |
5c13941a DB |
1401 | { |
1402 | int result = 0; | |
1403 | int min_uV, max_uV; | |
5c13941a DB |
1404 | |
1405 | if (vdd_bit) { | |
1406 | int tmp; | |
5c13941a | 1407 | |
9cde5b7a CB |
1408 | /* |
1409 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
5c13941a DB |
1410 | * bits this regulator doesn't quite support ... don't |
1411 | * be too picky, most cards and regulators are OK with | |
1412 | * a 0.1V range goof (it's a small error percentage). | |
1413 | */ | |
1414 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1415 | if (tmp == 0) { | |
1416 | min_uV = 1650 * 1000; | |
1417 | max_uV = 1950 * 1000; | |
1418 | } else { | |
1419 | min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1420 | max_uV = min_uV + 100 * 1000; | |
1421 | } | |
1422 | ||
ca6429d4 | 1423 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1424 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1425 | result = regulator_enable(supply); |
99fc5131 LW |
1426 | if (!result) |
1427 | mmc->regulator_enabled = true; | |
1428 | } | |
1429 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1430 | result = regulator_disable(supply); |
99fc5131 LW |
1431 | if (result == 0) |
1432 | mmc->regulator_enabled = false; | |
5c13941a DB |
1433 | } |
1434 | ||
99fc5131 LW |
1435 | if (result) |
1436 | dev_err(mmc_dev(mmc), | |
1437 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1438 | return result; |
1439 | } | |
45a6b32e | 1440 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1441 | |
4d1f52f9 TK |
1442 | #endif /* CONFIG_REGULATOR */ |
1443 | ||
e137788d GL |
1444 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1445 | { | |
1446 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1447 | int ret; |
1448 | ||
4d1f52f9 | 1449 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1450 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1451 | |
4d1f52f9 TK |
1452 | if (IS_ERR(mmc->supply.vmmc)) { |
1453 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1454 | return -EPROBE_DEFER; | |
1455 | dev_info(dev, "No vmmc regulator found\n"); | |
1456 | } else { | |
1457 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1458 | if (ret > 0) | |
1459 | mmc->ocr_avail = ret; | |
1460 | else | |
1461 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1462 | } | |
e137788d | 1463 | |
4d1f52f9 TK |
1464 | if (IS_ERR(mmc->supply.vqmmc)) { |
1465 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1466 | return -EPROBE_DEFER; | |
1467 | dev_info(dev, "No vqmmc regulator found\n"); | |
1468 | } | |
e137788d GL |
1469 | |
1470 | return 0; | |
1471 | } | |
1472 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1473 | ||
1da177e4 LT |
1474 | /* |
1475 | * Mask off any voltages we don't support and select | |
1476 | * the lowest voltage | |
1477 | */ | |
7ea239d9 | 1478 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1479 | { |
1480 | int bit; | |
1481 | ||
726d6f23 UH |
1482 | /* |
1483 | * Sanity check the voltages that the card claims to | |
1484 | * support. | |
1485 | */ | |
1486 | if (ocr & 0x7F) { | |
1487 | dev_warn(mmc_dev(host), | |
1488 | "card claims to support voltages below defined range\n"); | |
1489 | ocr &= ~0x7F; | |
1490 | } | |
1491 | ||
1da177e4 | 1492 | ocr &= host->ocr_avail; |
ce69d37b UH |
1493 | if (!ocr) { |
1494 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1495 | return 0; | |
1496 | } | |
1da177e4 | 1497 | |
ce69d37b UH |
1498 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1499 | bit = ffs(ocr) - 1; | |
63ef731a | 1500 | ocr &= 3 << bit; |
ce69d37b | 1501 | mmc_power_cycle(host, ocr); |
1da177e4 | 1502 | } else { |
ce69d37b UH |
1503 | bit = fls(ocr) - 1; |
1504 | ocr &= 3 << bit; | |
1505 | if (bit != host->ios.vdd) | |
1506 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | return ocr; | |
1510 | } | |
1511 | ||
567c8903 JR |
1512 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
1513 | { | |
1514 | int err = 0; | |
1515 | int old_signal_voltage = host->ios.signal_voltage; | |
1516 | ||
1517 | host->ios.signal_voltage = signal_voltage; | |
1518 | if (host->ops->start_signal_voltage_switch) { | |
1519 | mmc_host_clk_hold(host); | |
1520 | err = host->ops->start_signal_voltage_switch(host, &host->ios); | |
1521 | mmc_host_clk_release(host); | |
1522 | } | |
1523 | ||
1524 | if (err) | |
1525 | host->ios.signal_voltage = old_signal_voltage; | |
1526 | ||
1527 | return err; | |
1528 | ||
1529 | } | |
1530 | ||
0f791fda | 1531 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr) |
f2119df6 AN |
1532 | { |
1533 | struct mmc_command cmd = {0}; | |
1534 | int err = 0; | |
0797e5f1 | 1535 | u32 clock; |
f2119df6 AN |
1536 | |
1537 | BUG_ON(!host); | |
1538 | ||
1539 | /* | |
1540 | * Send CMD11 only if the request is to switch the card to | |
1541 | * 1.8V signalling. | |
1542 | */ | |
0797e5f1 JR |
1543 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
1544 | return __mmc_set_signal_voltage(host, signal_voltage); | |
f2119df6 | 1545 | |
0797e5f1 JR |
1546 | /* |
1547 | * If we cannot switch voltages, return failure so the caller | |
1548 | * can continue without UHS mode | |
1549 | */ | |
1550 | if (!host->ops->start_signal_voltage_switch) | |
1551 | return -EPERM; | |
1552 | if (!host->ops->card_busy) | |
6606110d JP |
1553 | pr_warn("%s: cannot verify signal voltage switch\n", |
1554 | mmc_hostname(host)); | |
0797e5f1 | 1555 | |
c6eb5880 VY |
1556 | mmc_host_clk_hold(host); |
1557 | ||
0797e5f1 JR |
1558 | cmd.opcode = SD_SWITCH_VOLTAGE; |
1559 | cmd.arg = 0; | |
1560 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1561 | ||
1562 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1563 | if (err) | |
c6eb5880 | 1564 | goto err_command; |
0797e5f1 | 1565 | |
c6eb5880 VY |
1566 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) { |
1567 | err = -EIO; | |
1568 | goto err_command; | |
1569 | } | |
0797e5f1 JR |
1570 | /* |
1571 | * The card should drive cmd and dat[0:3] low immediately | |
1572 | * after the response of cmd11, but wait 1 ms to be sure | |
1573 | */ | |
1574 | mmc_delay(1); | |
1575 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1576 | err = -EAGAIN; | |
1577 | goto power_cycle; | |
1578 | } | |
1579 | /* | |
1580 | * During a signal voltage level switch, the clock must be gated | |
1581 | * for 5 ms according to the SD spec | |
1582 | */ | |
1583 | clock = host->ios.clock; | |
1584 | host->ios.clock = 0; | |
1585 | mmc_set_ios(host); | |
f2119df6 | 1586 | |
0797e5f1 JR |
1587 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
1588 | /* | |
1589 | * Voltages may not have been switched, but we've already | |
1590 | * sent CMD11, so a power cycle is required anyway | |
1591 | */ | |
1592 | err = -EAGAIN; | |
1593 | goto power_cycle; | |
f2119df6 AN |
1594 | } |
1595 | ||
7c5209c3 DA |
1596 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
1597 | mmc_delay(10); | |
0797e5f1 JR |
1598 | host->ios.clock = clock; |
1599 | mmc_set_ios(host); | |
1600 | ||
1601 | /* Wait for at least 1 ms according to spec */ | |
1602 | mmc_delay(1); | |
1603 | ||
1604 | /* | |
1605 | * Failure to switch is indicated by the card holding | |
1606 | * dat[0:3] low | |
1607 | */ | |
1608 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1609 | err = -EAGAIN; | |
1610 | ||
1611 | power_cycle: | |
1612 | if (err) { | |
1613 | pr_debug("%s: Signal voltage switch failed, " | |
1614 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1615 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1616 | } |
1617 | ||
c6eb5880 | 1618 | err_command: |
0797e5f1 JR |
1619 | mmc_host_clk_release(host); |
1620 | ||
1621 | return err; | |
f2119df6 AN |
1622 | } |
1623 | ||
b57c43ad | 1624 | /* |
7ea239d9 | 1625 | * Select timing parameters for host. |
b57c43ad | 1626 | */ |
7ea239d9 | 1627 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1628 | { |
778e277c | 1629 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1630 | host->ios.timing = timing; |
1631 | mmc_set_ios(host); | |
778e277c | 1632 | mmc_host_clk_release(host); |
b57c43ad PO |
1633 | } |
1634 | ||
d6d50a15 AN |
1635 | /* |
1636 | * Select appropriate driver type for host. | |
1637 | */ | |
1638 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1639 | { | |
778e277c | 1640 | mmc_host_clk_hold(host); |
d6d50a15 AN |
1641 | host->ios.drv_type = drv_type; |
1642 | mmc_set_ios(host); | |
778e277c | 1643 | mmc_host_clk_release(host); |
d6d50a15 AN |
1644 | } |
1645 | ||
e23350b3 AH |
1646 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
1647 | int card_drv_type, int *drv_type) | |
1648 | { | |
1649 | struct mmc_host *host = card->host; | |
1650 | int host_drv_type = SD_DRIVER_TYPE_B; | |
1651 | int drive_strength; | |
1652 | ||
1653 | *drv_type = 0; | |
1654 | ||
1655 | if (!host->ops->select_drive_strength) | |
1656 | return 0; | |
1657 | ||
1658 | /* Use SD definition of driver strength for hosts */ | |
1659 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) | |
1660 | host_drv_type |= SD_DRIVER_TYPE_A; | |
1661 | ||
1662 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) | |
1663 | host_drv_type |= SD_DRIVER_TYPE_C; | |
1664 | ||
1665 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) | |
1666 | host_drv_type |= SD_DRIVER_TYPE_D; | |
1667 | ||
1668 | /* | |
1669 | * The drive strength that the hardware can support | |
1670 | * depends on the board design. Pass the appropriate | |
1671 | * information and let the hardware specific code | |
1672 | * return what is possible given the options | |
1673 | */ | |
1674 | mmc_host_clk_hold(host); | |
1675 | drive_strength = host->ops->select_drive_strength(card, max_dtr, | |
1676 | host_drv_type, | |
1677 | card_drv_type, | |
1678 | drv_type); | |
1679 | mmc_host_clk_release(host); | |
1680 | ||
1681 | return drive_strength; | |
1682 | } | |
1683 | ||
1da177e4 | 1684 | /* |
45f8245b RK |
1685 | * Apply power to the MMC stack. This is a two-stage process. |
1686 | * First, we enable power to the card without the clock running. | |
1687 | * We then wait a bit for the power to stabilise. Finally, | |
1688 | * enable the bus drivers and clock to the card. | |
1689 | * | |
1690 | * We must _NOT_ enable the clock prior to power stablising. | |
1691 | * | |
1692 | * If a host does all the power sequencing itself, ignore the | |
1693 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1694 | */ |
4a065193 | 1695 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1696 | { |
fa550189 UH |
1697 | if (host->ios.power_mode == MMC_POWER_ON) |
1698 | return; | |
1699 | ||
778e277c MW |
1700 | mmc_host_clk_hold(host); |
1701 | ||
3aa8793f UH |
1702 | mmc_pwrseq_pre_power_on(host); |
1703 | ||
4a065193 | 1704 | host->ios.vdd = fls(ocr) - 1; |
1da177e4 | 1705 | host->ios.power_mode = MMC_POWER_UP; |
2d079c43 JR |
1706 | /* Set initial state and call mmc_set_ios */ |
1707 | mmc_set_initial_state(host); | |
1da177e4 | 1708 | |
ceae98f2 TK |
1709 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
1710 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) | |
1711 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1712 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) | |
1713 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1714 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) | |
1715 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
108ecc4c | 1716 | |
f9996aee PO |
1717 | /* |
1718 | * This delay should be sufficient to allow the power supply | |
1719 | * to reach the minimum voltage. | |
1720 | */ | |
79bccc5a | 1721 | mmc_delay(10); |
1da177e4 | 1722 | |
4febb7e2 UH |
1723 | mmc_pwrseq_post_power_on(host); |
1724 | ||
88ae8b86 | 1725 | host->ios.clock = host->f_init; |
8dfd0374 | 1726 | |
1da177e4 | 1727 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1728 | mmc_set_ios(host); |
1da177e4 | 1729 | |
f9996aee PO |
1730 | /* |
1731 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1732 | * time required to reach a stable voltage. | |
1733 | */ | |
79bccc5a | 1734 | mmc_delay(10); |
778e277c MW |
1735 | |
1736 | mmc_host_clk_release(host); | |
1da177e4 LT |
1737 | } |
1738 | ||
7f7e4129 | 1739 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1740 | { |
fa550189 UH |
1741 | if (host->ios.power_mode == MMC_POWER_OFF) |
1742 | return; | |
1743 | ||
778e277c MW |
1744 | mmc_host_clk_hold(host); |
1745 | ||
3aa8793f UH |
1746 | mmc_pwrseq_power_off(host); |
1747 | ||
1da177e4 LT |
1748 | host->ios.clock = 0; |
1749 | host->ios.vdd = 0; | |
b33d46c3 | 1750 | |
1da177e4 | 1751 | host->ios.power_mode = MMC_POWER_OFF; |
2d079c43 JR |
1752 | /* Set initial state and call mmc_set_ios */ |
1753 | mmc_set_initial_state(host); | |
778e277c | 1754 | |
041beb1d DD |
1755 | /* |
1756 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1757 | * XO-1.5, require a short delay after poweroff before the card | |
1758 | * can be successfully turned on again. | |
1759 | */ | |
1760 | mmc_delay(1); | |
1761 | ||
778e277c | 1762 | mmc_host_clk_release(host); |
1da177e4 LT |
1763 | } |
1764 | ||
4a065193 | 1765 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1766 | { |
1767 | mmc_power_off(host); | |
1768 | /* Wait at least 1 ms according to SD spec */ | |
1769 | mmc_delay(1); | |
4a065193 | 1770 | mmc_power_up(host, ocr); |
276e090f JR |
1771 | } |
1772 | ||
39361851 AB |
1773 | /* |
1774 | * Cleanup when the last reference to the bus operator is dropped. | |
1775 | */ | |
261172fd | 1776 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 AB |
1777 | { |
1778 | BUG_ON(!host); | |
1779 | BUG_ON(host->bus_refs); | |
1780 | BUG_ON(!host->bus_dead); | |
1781 | ||
1782 | host->bus_ops = NULL; | |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * Increase reference count of bus operator | |
1787 | */ | |
1788 | static inline void mmc_bus_get(struct mmc_host *host) | |
1789 | { | |
1790 | unsigned long flags; | |
1791 | ||
1792 | spin_lock_irqsave(&host->lock, flags); | |
1793 | host->bus_refs++; | |
1794 | spin_unlock_irqrestore(&host->lock, flags); | |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * Decrease reference count of bus operator and free it if | |
1799 | * it is the last reference. | |
1800 | */ | |
1801 | static inline void mmc_bus_put(struct mmc_host *host) | |
1802 | { | |
1803 | unsigned long flags; | |
1804 | ||
1805 | spin_lock_irqsave(&host->lock, flags); | |
1806 | host->bus_refs--; | |
1807 | if ((host->bus_refs == 0) && host->bus_ops) | |
1808 | __mmc_release_bus(host); | |
1809 | spin_unlock_irqrestore(&host->lock, flags); | |
1810 | } | |
1811 | ||
1da177e4 | 1812 | /* |
7ea239d9 PO |
1813 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1814 | * host at any given time. | |
1da177e4 | 1815 | */ |
7ea239d9 | 1816 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1817 | { |
7ea239d9 | 1818 | unsigned long flags; |
e45a1bd2 | 1819 | |
7ea239d9 PO |
1820 | BUG_ON(!host); |
1821 | BUG_ON(!ops); | |
b855885e | 1822 | |
d84075c8 | 1823 | WARN_ON(!host->claimed); |
bce40a36 | 1824 | |
7ea239d9 | 1825 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1826 | |
7ea239d9 PO |
1827 | BUG_ON(host->bus_ops); |
1828 | BUG_ON(host->bus_refs); | |
b57c43ad | 1829 | |
7ea239d9 PO |
1830 | host->bus_ops = ops; |
1831 | host->bus_refs = 1; | |
1832 | host->bus_dead = 0; | |
b57c43ad | 1833 | |
7ea239d9 | 1834 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1835 | } |
1836 | ||
7ea239d9 | 1837 | /* |
7f7e4129 | 1838 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1839 | */ |
1840 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1841 | { |
7ea239d9 | 1842 | unsigned long flags; |
7ccd266e | 1843 | |
7ea239d9 | 1844 | BUG_ON(!host); |
7ccd266e | 1845 | |
d84075c8 PO |
1846 | WARN_ON(!host->claimed); |
1847 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1848 | |
7ea239d9 | 1849 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1850 | |
7ea239d9 | 1851 | host->bus_dead = 1; |
7ccd266e | 1852 | |
7ea239d9 | 1853 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1854 | |
7ea239d9 | 1855 | mmc_bus_put(host); |
1da177e4 LT |
1856 | } |
1857 | ||
bbd43682 UH |
1858 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1859 | bool cd_irq) | |
1860 | { | |
1861 | #ifdef CONFIG_MMC_DEBUG | |
1862 | unsigned long flags; | |
1863 | spin_lock_irqsave(&host->lock, flags); | |
1864 | WARN_ON(host->removed); | |
1865 | spin_unlock_irqrestore(&host->lock, flags); | |
1866 | #endif | |
1867 | ||
1868 | /* | |
1869 | * If the device is configured as wakeup, we prevent a new sleep for | |
1870 | * 5 s to give provision for user space to consume the event. | |
1871 | */ | |
1872 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1873 | device_can_wakeup(mmc_dev(host))) | |
1874 | pm_wakeup_event(mmc_dev(host), 5000); | |
1875 | ||
1876 | host->detect_change = 1; | |
1877 | mmc_schedule_delayed_work(&host->detect, delay); | |
1878 | } | |
1879 | ||
1da177e4 LT |
1880 | /** |
1881 | * mmc_detect_change - process change of state on a MMC socket | |
1882 | * @host: host which changed state. | |
8dc00335 | 1883 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1884 | * |
67a61c48 PO |
1885 | * MMC drivers should call this when they detect a card has been |
1886 | * inserted or removed. The MMC layer will confirm that any | |
1887 | * present card is still functional, and initialize any newly | |
1888 | * inserted. | |
1da177e4 | 1889 | */ |
8dc00335 | 1890 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1891 | { |
bbd43682 | 1892 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1893 | } |
1da177e4 LT |
1894 | EXPORT_SYMBOL(mmc_detect_change); |
1895 | ||
dfe86cba AH |
1896 | void mmc_init_erase(struct mmc_card *card) |
1897 | { | |
1898 | unsigned int sz; | |
1899 | ||
1900 | if (is_power_of_2(card->erase_size)) | |
1901 | card->erase_shift = ffs(card->erase_size) - 1; | |
1902 | else | |
1903 | card->erase_shift = 0; | |
1904 | ||
1905 | /* | |
1906 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1907 | * card. That is not desirable because it can take a long time | |
1908 | * (minutes) potentially delaying more important I/O, and also the | |
1909 | * timeout calculations become increasingly hugely over-estimated. | |
1910 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1911 | * to that size and alignment. | |
1912 | * | |
1913 | * For SD cards that define Allocation Unit size, limit erases to one | |
1914 | * Allocation Unit at a time. For MMC cards that define High Capacity | |
1915 | * Erase Size, whether it is switched on or not, limit to that size. | |
1916 | * Otherwise just have a stab at a good value. For modern cards it | |
1917 | * will end up being 4MiB. Note that if the value is too small, it | |
1918 | * can end up taking longer to erase. | |
1919 | */ | |
1920 | if (mmc_card_sd(card) && card->ssr.au) { | |
1921 | card->pref_erase = card->ssr.au; | |
1922 | card->erase_shift = ffs(card->ssr.au) - 1; | |
1923 | } else if (card->ext_csd.hc_erase_size) { | |
1924 | card->pref_erase = card->ext_csd.hc_erase_size; | |
cc8aa7de | 1925 | } else if (card->erase_size) { |
dfe86cba AH |
1926 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1927 | if (sz < 128) | |
1928 | card->pref_erase = 512 * 1024 / 512; | |
1929 | else if (sz < 512) | |
1930 | card->pref_erase = 1024 * 1024 / 512; | |
1931 | else if (sz < 1024) | |
1932 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1933 | else | |
1934 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1935 | if (card->pref_erase < card->erase_size) | |
1936 | card->pref_erase = card->erase_size; | |
1937 | else { | |
1938 | sz = card->pref_erase % card->erase_size; | |
1939 | if (sz) | |
1940 | card->pref_erase += card->erase_size - sz; | |
1941 | } | |
cc8aa7de CD |
1942 | } else |
1943 | card->pref_erase = 0; | |
dfe86cba AH |
1944 | } |
1945 | ||
eaa02f75 AW |
1946 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1947 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1948 | { |
1949 | unsigned int erase_timeout; | |
1950 | ||
7194efb8 AH |
1951 | if (arg == MMC_DISCARD_ARG || |
1952 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1953 | erase_timeout = card->ext_csd.trim_timeout; | |
1954 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1955 | /* High Capacity Erase Group Size uses HC timeouts */ |
1956 | if (arg == MMC_TRIM_ARG) | |
1957 | erase_timeout = card->ext_csd.trim_timeout; | |
1958 | else | |
1959 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1960 | } else { | |
1961 | /* CSD Erase Group Size uses write timeout */ | |
1962 | unsigned int mult = (10 << card->csd.r2w_factor); | |
1963 | unsigned int timeout_clks = card->csd.tacc_clks * mult; | |
1964 | unsigned int timeout_us; | |
1965 | ||
1966 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ | |
1967 | if (card->csd.tacc_ns < 1000000) | |
1968 | timeout_us = (card->csd.tacc_ns * mult) / 1000; | |
1969 | else | |
1970 | timeout_us = (card->csd.tacc_ns / 1000) * mult; | |
1971 | ||
1972 | /* | |
1973 | * ios.clock is only a target. The real clock rate might be | |
1974 | * less but not that much less, so fudge it by multiplying by 2. | |
1975 | */ | |
1976 | timeout_clks <<= 1; | |
1977 | timeout_us += (timeout_clks * 1000) / | |
4cf8c6dd | 1978 | (mmc_host_clk_rate(card->host) / 1000); |
dfe86cba AH |
1979 | |
1980 | erase_timeout = timeout_us / 1000; | |
1981 | ||
1982 | /* | |
1983 | * Theoretically, the calculation could underflow so round up | |
1984 | * to 1ms in that case. | |
1985 | */ | |
1986 | if (!erase_timeout) | |
1987 | erase_timeout = 1; | |
1988 | } | |
1989 | ||
1990 | /* Multiplier for secure operations */ | |
1991 | if (arg & MMC_SECURE_ARGS) { | |
1992 | if (arg == MMC_SECURE_ERASE_ARG) | |
1993 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1994 | else | |
1995 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1996 | } | |
1997 | ||
1998 | erase_timeout *= qty; | |
1999 | ||
2000 | /* | |
2001 | * Ensure at least a 1 second timeout for SPI as per | |
2002 | * 'mmc_set_data_timeout()' | |
2003 | */ | |
2004 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
2005 | erase_timeout = 1000; | |
2006 | ||
eaa02f75 | 2007 | return erase_timeout; |
dfe86cba AH |
2008 | } |
2009 | ||
eaa02f75 AW |
2010 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
2011 | unsigned int arg, | |
2012 | unsigned int qty) | |
dfe86cba | 2013 | { |
eaa02f75 AW |
2014 | unsigned int erase_timeout; |
2015 | ||
dfe86cba AH |
2016 | if (card->ssr.erase_timeout) { |
2017 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
2018 | erase_timeout = card->ssr.erase_timeout * qty + |
2019 | card->ssr.erase_offset; | |
dfe86cba AH |
2020 | } else { |
2021 | /* | |
2022 | * Erase timeout not specified in SD Status Register (SSR) so | |
2023 | * use 250ms per write block. | |
2024 | */ | |
eaa02f75 | 2025 | erase_timeout = 250 * qty; |
dfe86cba AH |
2026 | } |
2027 | ||
2028 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
2029 | if (erase_timeout < 1000) |
2030 | erase_timeout = 1000; | |
2031 | ||
2032 | return erase_timeout; | |
dfe86cba AH |
2033 | } |
2034 | ||
eaa02f75 AW |
2035 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
2036 | unsigned int arg, | |
2037 | unsigned int qty) | |
dfe86cba AH |
2038 | { |
2039 | if (mmc_card_sd(card)) | |
eaa02f75 | 2040 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 2041 | else |
eaa02f75 | 2042 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2043 | } |
2044 | ||
2045 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
2046 | unsigned int to, unsigned int arg) | |
2047 | { | |
1278dba1 | 2048 | struct mmc_command cmd = {0}; |
dfe86cba | 2049 | unsigned int qty = 0; |
8fee476b | 2050 | unsigned long timeout; |
dfe86cba AH |
2051 | int err; |
2052 | ||
8f11d106 AH |
2053 | mmc_retune_hold(card->host); |
2054 | ||
dfe86cba AH |
2055 | /* |
2056 | * qty is used to calculate the erase timeout which depends on how many | |
2057 | * erase groups (or allocation units in SD terminology) are affected. | |
2058 | * We count erasing part of an erase group as one erase group. | |
2059 | * For SD, the allocation units are always a power of 2. For MMC, the | |
2060 | * erase group size is almost certainly also power of 2, but it does not | |
2061 | * seem to insist on that in the JEDEC standard, so we fall back to | |
2062 | * division in that case. SD may not specify an allocation unit size, | |
2063 | * in which case the timeout is based on the number of write blocks. | |
2064 | * | |
2065 | * Note that the timeout for secure trim 2 will only be correct if the | |
2066 | * number of erase groups specified is the same as the total of all | |
2067 | * preceding secure trim 1 commands. Since the power may have been | |
2068 | * lost since the secure trim 1 commands occurred, it is generally | |
2069 | * impossible to calculate the secure trim 2 timeout correctly. | |
2070 | */ | |
2071 | if (card->erase_shift) | |
2072 | qty += ((to >> card->erase_shift) - | |
2073 | (from >> card->erase_shift)) + 1; | |
2074 | else if (mmc_card_sd(card)) | |
2075 | qty += to - from + 1; | |
2076 | else | |
2077 | qty += ((to / card->erase_size) - | |
2078 | (from / card->erase_size)) + 1; | |
2079 | ||
2080 | if (!mmc_card_blockaddr(card)) { | |
2081 | from <<= 9; | |
2082 | to <<= 9; | |
2083 | } | |
2084 | ||
dfe86cba AH |
2085 | if (mmc_card_sd(card)) |
2086 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
2087 | else | |
2088 | cmd.opcode = MMC_ERASE_GROUP_START; | |
2089 | cmd.arg = from; | |
2090 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2091 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2092 | if (err) { | |
a3c76eb9 | 2093 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 2094 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 2095 | err = -EIO; |
dfe86cba AH |
2096 | goto out; |
2097 | } | |
2098 | ||
2099 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2100 | if (mmc_card_sd(card)) | |
2101 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
2102 | else | |
2103 | cmd.opcode = MMC_ERASE_GROUP_END; | |
2104 | cmd.arg = to; | |
2105 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2106 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2107 | if (err) { | |
a3c76eb9 | 2108 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 2109 | err, cmd.resp[0]); |
67716327 | 2110 | err = -EIO; |
dfe86cba AH |
2111 | goto out; |
2112 | } | |
2113 | ||
2114 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2115 | cmd.opcode = MMC_ERASE; | |
2116 | cmd.arg = arg; | |
2117 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1d4d7744 | 2118 | cmd.busy_timeout = mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
2119 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
2120 | if (err) { | |
a3c76eb9 | 2121 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
2122 | err, cmd.resp[0]); |
2123 | err = -EIO; | |
2124 | goto out; | |
2125 | } | |
2126 | ||
2127 | if (mmc_host_is_spi(card->host)) | |
2128 | goto out; | |
2129 | ||
8fee476b | 2130 | timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); |
dfe86cba AH |
2131 | do { |
2132 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
2133 | cmd.opcode = MMC_SEND_STATUS; | |
2134 | cmd.arg = card->rca << 16; | |
2135 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
2136 | /* Do not retry else we can't see errors */ | |
2137 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2138 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 2139 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
2140 | err, cmd.resp[0]); |
2141 | err = -EIO; | |
2142 | goto out; | |
2143 | } | |
8fee476b TR |
2144 | |
2145 | /* Timeout if the device never becomes ready for data and | |
2146 | * never leaves the program state. | |
2147 | */ | |
2148 | if (time_after(jiffies, timeout)) { | |
2149 | pr_err("%s: Card stuck in programming state! %s\n", | |
2150 | mmc_hostname(card->host), __func__); | |
2151 | err = -EIO; | |
2152 | goto out; | |
2153 | } | |
2154 | ||
dfe86cba | 2155 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2156 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba | 2157 | out: |
8f11d106 | 2158 | mmc_retune_release(card->host); |
dfe86cba AH |
2159 | return err; |
2160 | } | |
2161 | ||
2162 | /** | |
2163 | * mmc_erase - erase sectors. | |
2164 | * @card: card to erase | |
2165 | * @from: first sector to erase | |
2166 | * @nr: number of sectors to erase | |
2167 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2168 | * | |
2169 | * Caller must claim host before calling this function. | |
2170 | */ | |
2171 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2172 | unsigned int arg) | |
2173 | { | |
2174 | unsigned int rem, to = from + nr; | |
642c28ab | 2175 | int err; |
dfe86cba AH |
2176 | |
2177 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2178 | !(card->csd.cmdclass & CCC_ERASE)) | |
2179 | return -EOPNOTSUPP; | |
2180 | ||
2181 | if (!card->erase_size) | |
2182 | return -EOPNOTSUPP; | |
2183 | ||
2184 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2185 | return -EOPNOTSUPP; | |
2186 | ||
2187 | if ((arg & MMC_SECURE_ARGS) && | |
2188 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2189 | return -EOPNOTSUPP; | |
2190 | ||
2191 | if ((arg & MMC_TRIM_ARGS) && | |
2192 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2193 | return -EOPNOTSUPP; | |
2194 | ||
2195 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2196 | if (from % card->erase_size || nr % card->erase_size) | |
2197 | return -EINVAL; | |
2198 | } | |
2199 | ||
2200 | if (arg == MMC_ERASE_ARG) { | |
2201 | rem = from % card->erase_size; | |
2202 | if (rem) { | |
2203 | rem = card->erase_size - rem; | |
2204 | from += rem; | |
2205 | if (nr > rem) | |
2206 | nr -= rem; | |
2207 | else | |
2208 | return 0; | |
2209 | } | |
2210 | rem = nr % card->erase_size; | |
2211 | if (rem) | |
2212 | nr -= rem; | |
2213 | } | |
2214 | ||
2215 | if (nr == 0) | |
2216 | return 0; | |
2217 | ||
2218 | to = from + nr; | |
2219 | ||
2220 | if (to <= from) | |
2221 | return -EINVAL; | |
2222 | ||
2223 | /* 'from' and 'to' are inclusive */ | |
2224 | to -= 1; | |
2225 | ||
642c28ab DJ |
2226 | /* |
2227 | * Special case where only one erase-group fits in the timeout budget: | |
2228 | * If the region crosses an erase-group boundary on this particular | |
2229 | * case, we will be trimming more than one erase-group which, does not | |
2230 | * fit in the timeout budget of the controller, so we need to split it | |
2231 | * and call mmc_do_erase() twice if necessary. This special case is | |
2232 | * identified by the card->eg_boundary flag. | |
2233 | */ | |
22d7e85f RG |
2234 | rem = card->erase_size - (from % card->erase_size); |
2235 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { | |
642c28ab DJ |
2236 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
2237 | from += rem; | |
2238 | if ((err) || (to <= from)) | |
2239 | return err; | |
2240 | } | |
2241 | ||
dfe86cba AH |
2242 | return mmc_do_erase(card, from, to, arg); |
2243 | } | |
2244 | EXPORT_SYMBOL(mmc_erase); | |
2245 | ||
2246 | int mmc_can_erase(struct mmc_card *card) | |
2247 | { | |
2248 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2249 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2250 | return 1; | |
2251 | return 0; | |
2252 | } | |
2253 | EXPORT_SYMBOL(mmc_can_erase); | |
2254 | ||
2255 | int mmc_can_trim(struct mmc_card *card) | |
2256 | { | |
b5b4ff0a SL |
2257 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
2258 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) | |
dfe86cba AH |
2259 | return 1; |
2260 | return 0; | |
2261 | } | |
2262 | EXPORT_SYMBOL(mmc_can_trim); | |
2263 | ||
b3bf9153 KP |
2264 | int mmc_can_discard(struct mmc_card *card) |
2265 | { | |
2266 | /* | |
2267 | * As there's no way to detect the discard support bit at v4.5 | |
2268 | * use the s/w feature support filed. | |
2269 | */ | |
2270 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2271 | return 1; | |
2272 | return 0; | |
2273 | } | |
2274 | EXPORT_SYMBOL(mmc_can_discard); | |
2275 | ||
d9ddd629 KP |
2276 | int mmc_can_sanitize(struct mmc_card *card) |
2277 | { | |
28302812 AH |
2278 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2279 | return 0; | |
d9ddd629 KP |
2280 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2281 | return 1; | |
2282 | return 0; | |
2283 | } | |
2284 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2285 | ||
dfe86cba AH |
2286 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2287 | { | |
5204d00f LC |
2288 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2289 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2290 | return 1; |
2291 | return 0; | |
2292 | } | |
2293 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2294 | ||
2295 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2296 | unsigned int nr) | |
2297 | { | |
2298 | if (!card->erase_size) | |
2299 | return 0; | |
2300 | if (from % card->erase_size || nr % card->erase_size) | |
2301 | return 0; | |
2302 | return 1; | |
2303 | } | |
2304 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2305 | |
e056a1b5 AH |
2306 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2307 | unsigned int arg) | |
2308 | { | |
2309 | struct mmc_host *host = card->host; | |
2310 | unsigned int max_discard, x, y, qty = 0, max_qty, timeout; | |
2311 | unsigned int last_timeout = 0; | |
2312 | ||
2313 | if (card->erase_shift) | |
2314 | max_qty = UINT_MAX >> card->erase_shift; | |
2315 | else if (mmc_card_sd(card)) | |
2316 | max_qty = UINT_MAX; | |
2317 | else | |
2318 | max_qty = UINT_MAX / card->erase_size; | |
2319 | ||
2320 | /* Find the largest qty with an OK timeout */ | |
2321 | do { | |
2322 | y = 0; | |
2323 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2324 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
68eb80e0 | 2325 | if (timeout > host->max_busy_timeout) |
e056a1b5 AH |
2326 | break; |
2327 | if (timeout < last_timeout) | |
2328 | break; | |
2329 | last_timeout = timeout; | |
2330 | y = x; | |
2331 | } | |
2332 | qty += y; | |
2333 | } while (y); | |
2334 | ||
2335 | if (!qty) | |
2336 | return 0; | |
2337 | ||
642c28ab DJ |
2338 | /* |
2339 | * When specifying a sector range to trim, chances are we might cross | |
2340 | * an erase-group boundary even if the amount of sectors is less than | |
2341 | * one erase-group. | |
2342 | * If we can only fit one erase-group in the controller timeout budget, | |
2343 | * we have to care that erase-group boundaries are not crossed by a | |
2344 | * single trim operation. We flag that special case with "eg_boundary". | |
2345 | * In all other cases we can just decrement qty and pretend that we | |
2346 | * always touch (qty + 1) erase-groups as a simple optimization. | |
2347 | */ | |
e056a1b5 | 2348 | if (qty == 1) |
642c28ab DJ |
2349 | card->eg_boundary = 1; |
2350 | else | |
2351 | qty--; | |
e056a1b5 AH |
2352 | |
2353 | /* Convert qty to sectors */ | |
2354 | if (card->erase_shift) | |
642c28ab | 2355 | max_discard = qty << card->erase_shift; |
e056a1b5 | 2356 | else if (mmc_card_sd(card)) |
642c28ab | 2357 | max_discard = qty + 1; |
e056a1b5 | 2358 | else |
642c28ab | 2359 | max_discard = qty * card->erase_size; |
e056a1b5 AH |
2360 | |
2361 | return max_discard; | |
2362 | } | |
2363 | ||
2364 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2365 | { | |
2366 | struct mmc_host *host = card->host; | |
2367 | unsigned int max_discard, max_trim; | |
2368 | ||
68eb80e0 | 2369 | if (!host->max_busy_timeout) |
e056a1b5 AH |
2370 | return UINT_MAX; |
2371 | ||
2372 | /* | |
2373 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2374 | * frequence which can change. In that case, the best choice is | |
2375 | * just the preferred erase size. | |
2376 | */ | |
2377 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2378 | return card->pref_erase; | |
2379 | ||
2380 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2381 | if (mmc_can_trim(card)) { | |
2382 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2383 | if (max_trim < max_discard) | |
2384 | max_discard = max_trim; | |
2385 | } else if (max_discard < card->erase_size) { | |
2386 | max_discard = 0; | |
2387 | } | |
2388 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
68eb80e0 | 2389 | mmc_hostname(host), max_discard, host->max_busy_timeout); |
e056a1b5 AH |
2390 | return max_discard; |
2391 | } | |
2392 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2393 | ||
0f8d8ea6 AH |
2394 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2395 | { | |
1278dba1 | 2396 | struct mmc_command cmd = {0}; |
0f8d8ea6 | 2397 | |
cdc99179 | 2398 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card)) |
0f8d8ea6 AH |
2399 | return 0; |
2400 | ||
0f8d8ea6 AH |
2401 | cmd.opcode = MMC_SET_BLOCKLEN; |
2402 | cmd.arg = blocklen; | |
2403 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2404 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2405 | } | |
2406 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2407 | ||
67c79db8 LP |
2408 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2409 | bool is_rel_write) | |
2410 | { | |
2411 | struct mmc_command cmd = {0}; | |
2412 | ||
2413 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2414 | cmd.arg = blockcount & 0x0000FFFF; | |
2415 | if (is_rel_write) | |
2416 | cmd.arg |= 1 << 31; | |
2417 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2418 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2419 | } | |
2420 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2421 | ||
b2499518 AH |
2422 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2423 | { | |
2424 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) | |
2425 | return; | |
2426 | mmc_host_clk_hold(host); | |
2427 | host->ops->hw_reset(host); | |
2428 | mmc_host_clk_release(host); | |
2429 | } | |
2430 | ||
83533ab2 | 2431 | int mmc_hw_reset(struct mmc_host *host) |
b2499518 | 2432 | { |
f855a371 | 2433 | int ret; |
b2499518 | 2434 | |
f855a371 | 2435 | if (!host->card) |
b2499518 AH |
2436 | return -EINVAL; |
2437 | ||
f855a371 JR |
2438 | mmc_bus_get(host); |
2439 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { | |
2440 | mmc_bus_put(host); | |
b2499518 | 2441 | return -EOPNOTSUPP; |
b2499518 AH |
2442 | } |
2443 | ||
f855a371 JR |
2444 | ret = host->bus_ops->reset(host); |
2445 | mmc_bus_put(host); | |
b2499518 | 2446 | |
0250fdf2 AH |
2447 | if (ret != -EOPNOTSUPP) |
2448 | pr_warn("%s: tried to reset card\n", mmc_hostname(host)); | |
b2499518 | 2449 | |
f855a371 | 2450 | return ret; |
b2499518 | 2451 | } |
b2499518 AH |
2452 | EXPORT_SYMBOL(mmc_hw_reset); |
2453 | ||
807e8e40 AR |
2454 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2455 | { | |
2456 | host->f_init = freq; | |
2457 | ||
2458 | #ifdef CONFIG_MMC_DEBUG | |
2459 | pr_info("%s: %s: trying to init card at %u Hz\n", | |
2460 | mmc_hostname(host), __func__, host->f_init); | |
2461 | #endif | |
4a065193 | 2462 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2463 | |
b2499518 AH |
2464 | /* |
2465 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2466 | * do a hardware reset if possible. | |
2467 | */ | |
2468 | mmc_hw_reset_for_init(host); | |
2469 | ||
2f94e55a PR |
2470 | /* |
2471 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2472 | * if the card is being re-initialized, just send it. CMD52 | |
2473 | * should be ignored by SD/eMMC cards. | |
2474 | */ | |
807e8e40 AR |
2475 | sdio_reset(host); |
2476 | mmc_go_idle(host); | |
2477 | ||
2478 | mmc_send_if_cond(host, host->ocr_avail); | |
2479 | ||
2480 | /* Order's important: probe SDIO, then SD, then MMC */ | |
2481 | if (!mmc_attach_sdio(host)) | |
2482 | return 0; | |
2483 | if (!mmc_attach_sd(host)) | |
2484 | return 0; | |
2485 | if (!mmc_attach_mmc(host)) | |
2486 | return 0; | |
2487 | ||
2488 | mmc_power_off(host); | |
2489 | return -EIO; | |
2490 | } | |
2491 | ||
d3049504 AH |
2492 | int _mmc_detect_card_removed(struct mmc_host *host) |
2493 | { | |
2494 | int ret; | |
2495 | ||
5601aaf7 | 2496 | if (host->caps & MMC_CAP_NONREMOVABLE) |
d3049504 AH |
2497 | return 0; |
2498 | ||
2499 | if (!host->card || mmc_card_removed(host->card)) | |
2500 | return 1; | |
2501 | ||
2502 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2503 | |
2504 | /* | |
2505 | * Card detect status and alive check may be out of sync if card is | |
2506 | * removed slowly, when card detect switch changes while card/slot | |
2507 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2508 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2509 | * detect work 200ms later for this case. | |
2510 | */ | |
2511 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2512 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2513 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2514 | } | |
2515 | ||
d3049504 AH |
2516 | if (ret) { |
2517 | mmc_card_set_removed(host->card); | |
2518 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2519 | } | |
2520 | ||
2521 | return ret; | |
2522 | } | |
2523 | ||
2524 | int mmc_detect_card_removed(struct mmc_host *host) | |
2525 | { | |
2526 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2527 | int ret; |
d3049504 AH |
2528 | |
2529 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2530 | |
2531 | if (!card) | |
2532 | return 1; | |
2533 | ||
2534 | ret = mmc_card_removed(card); | |
d3049504 AH |
2535 | /* |
2536 | * The card will be considered unchanged unless we have been asked to | |
2537 | * detect a change or host requires polling to provide card detection. | |
2538 | */ | |
b6891679 | 2539 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2540 | return ret; |
d3049504 AH |
2541 | |
2542 | host->detect_change = 0; | |
f0cc9cf9 UH |
2543 | if (!ret) { |
2544 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2545 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2546 | /* |
2547 | * Schedule a detect work as soon as possible to let a | |
2548 | * rescan handle the card removal. | |
2549 | */ | |
2550 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2551 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2552 | } |
2553 | } | |
d3049504 | 2554 | |
f0cc9cf9 | 2555 | return ret; |
d3049504 AH |
2556 | } |
2557 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2558 | ||
b93931a6 | 2559 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2560 | { |
c4028958 DH |
2561 | struct mmc_host *host = |
2562 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2563 | int i; |
4c2ef25f | 2564 | |
fa372a51 MM |
2565 | if (host->trigger_card_event && host->ops->card_event) { |
2566 | host->ops->card_event(host); | |
2567 | host->trigger_card_event = false; | |
2568 | } | |
2569 | ||
807e8e40 | 2570 | if (host->rescan_disable) |
4c2ef25f | 2571 | return; |
1da177e4 | 2572 | |
3339d1e3 JR |
2573 | /* If there is a non-removable card registered, only scan once */ |
2574 | if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) | |
2575 | return; | |
2576 | host->rescan_entered = 1; | |
2577 | ||
7ea239d9 | 2578 | mmc_bus_get(host); |
b855885e | 2579 | |
30201e7f OBC |
2580 | /* |
2581 | * if there is a _removable_ card registered, check whether it is | |
2582 | * still present | |
2583 | */ | |
5601aaf7 | 2584 | if (host->bus_ops && !host->bus_dead |
bad3baba | 2585 | && !(host->caps & MMC_CAP_NONREMOVABLE)) |
94d89efb JS |
2586 | host->bus_ops->detect(host); |
2587 | ||
d3049504 AH |
2588 | host->detect_change = 0; |
2589 | ||
c5841798 CB |
2590 | /* |
2591 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2592 | * the card is no longer present. | |
2593 | */ | |
94d89efb | 2594 | mmc_bus_put(host); |
94d89efb JS |
2595 | mmc_bus_get(host); |
2596 | ||
2597 | /* if there still is a card present, stop here */ | |
2598 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2599 | mmc_bus_put(host); |
94d89efb JS |
2600 | goto out; |
2601 | } | |
1da177e4 | 2602 | |
94d89efb JS |
2603 | /* |
2604 | * Only we can add a new handler, so it's safe to | |
2605 | * release the lock here. | |
2606 | */ | |
2607 | mmc_bus_put(host); | |
1da177e4 | 2608 | |
c1b55bfc SH |
2609 | if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && |
2610 | host->ops->get_cd(host) == 0) { | |
fa550189 UH |
2611 | mmc_claim_host(host); |
2612 | mmc_power_off(host); | |
2613 | mmc_release_host(host); | |
94d89efb | 2614 | goto out; |
fa550189 | 2615 | } |
1da177e4 | 2616 | |
807e8e40 | 2617 | mmc_claim_host(host); |
88ae8b86 | 2618 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2619 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2620 | break; | |
06b2233a | 2621 | if (freqs[i] <= host->f_min) |
807e8e40 | 2622 | break; |
88ae8b86 | 2623 | } |
807e8e40 AR |
2624 | mmc_release_host(host); |
2625 | ||
2626 | out: | |
28f52482 AV |
2627 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2628 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2629 | } |
2630 | ||
b93931a6 | 2631 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2632 | { |
fa550189 | 2633 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2634 | host->rescan_disable = 0; |
8af465db | 2635 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
a08b17be AH |
2636 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
2637 | mmc_power_off(host); | |
2638 | else | |
4a065193 | 2639 | mmc_power_up(host, host->ocr_avail); |
740a221e | 2640 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2641 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2642 | } |
2643 | ||
b93931a6 | 2644 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2645 | { |
3b91e550 | 2646 | #ifdef CONFIG_MMC_DEBUG |
1efd48b3 PO |
2647 | unsigned long flags; |
2648 | spin_lock_irqsave(&host->lock, flags); | |
3b91e550 | 2649 | host->removed = 1; |
1efd48b3 | 2650 | spin_unlock_irqrestore(&host->lock, flags); |
3b91e550 | 2651 | #endif |
740a221e AH |
2652 | if (host->slot.cd_irq >= 0) |
2653 | disable_irq(host->slot.cd_irq); | |
3b91e550 | 2654 | |
d9adcc12 | 2655 | host->rescan_disable = 1; |
d9bcbf34 | 2656 | cancel_delayed_work_sync(&host->detect); |
3b91e550 PO |
2657 | mmc_flush_scheduled_work(); |
2658 | ||
da68c4eb NP |
2659 | /* clear pm flags now and let card drivers set them as needed */ |
2660 | host->pm_flags = 0; | |
2661 | ||
7ea239d9 PO |
2662 | mmc_bus_get(host); |
2663 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2664 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2665 | host->bus_ops->remove(host); |
7ea239d9 PO |
2666 | mmc_claim_host(host); |
2667 | mmc_detach_bus(host); | |
7f7e4129 | 2668 | mmc_power_off(host); |
7ea239d9 | 2669 | mmc_release_host(host); |
53509f0f DK |
2670 | mmc_bus_put(host); |
2671 | return; | |
1da177e4 | 2672 | } |
7ea239d9 PO |
2673 | mmc_bus_put(host); |
2674 | ||
2675 | BUG_ON(host->card); | |
1da177e4 LT |
2676 | |
2677 | mmc_power_off(host); | |
2678 | } | |
2679 | ||
12ae637f | 2680 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2681 | { |
12ae637f OBC |
2682 | int ret = 0; |
2683 | ||
bb9cab94 DD |
2684 | #ifdef CONFIG_MMC_DEBUG |
2685 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); | |
2686 | #endif | |
2687 | ||
eae1aeee AH |
2688 | mmc_bus_get(host); |
2689 | ||
5601aaf7 | 2690 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2691 | mmc_bus_put(host); |
12ae637f | 2692 | return -EINVAL; |
eae1aeee AH |
2693 | } |
2694 | ||
2695 | if (host->bus_ops->power_save) | |
12ae637f | 2696 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2697 | |
2698 | mmc_bus_put(host); | |
2699 | ||
2700 | mmc_power_off(host); | |
12ae637f OBC |
2701 | |
2702 | return ret; | |
eae1aeee AH |
2703 | } |
2704 | EXPORT_SYMBOL(mmc_power_save_host); | |
2705 | ||
12ae637f | 2706 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2707 | { |
12ae637f OBC |
2708 | int ret; |
2709 | ||
bb9cab94 DD |
2710 | #ifdef CONFIG_MMC_DEBUG |
2711 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); | |
2712 | #endif | |
2713 | ||
eae1aeee AH |
2714 | mmc_bus_get(host); |
2715 | ||
5601aaf7 | 2716 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2717 | mmc_bus_put(host); |
12ae637f | 2718 | return -EINVAL; |
eae1aeee AH |
2719 | } |
2720 | ||
69041150 | 2721 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2722 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2723 | |
2724 | mmc_bus_put(host); | |
12ae637f OBC |
2725 | |
2726 | return ret; | |
eae1aeee AH |
2727 | } |
2728 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2729 | ||
881d1c25 SJ |
2730 | /* |
2731 | * Flush the cache to the non-volatile storage. | |
2732 | */ | |
2733 | int mmc_flush_cache(struct mmc_card *card) | |
2734 | { | |
881d1c25 SJ |
2735 | int err = 0; |
2736 | ||
881d1c25 SJ |
2737 | if (mmc_card_mmc(card) && |
2738 | (card->ext_csd.cache_size > 0) && | |
2739 | (card->ext_csd.cache_ctrl & 1)) { | |
2740 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
2741 | EXT_CSD_FLUSH_CACHE, 1, 0); | |
2742 | if (err) | |
2743 | pr_err("%s: cache flush error %d\n", | |
2744 | mmc_hostname(card->host), err); | |
2745 | } | |
2746 | ||
2747 | return err; | |
2748 | } | |
2749 | EXPORT_SYMBOL(mmc_flush_cache); | |
2750 | ||
1da177e4 LT |
2751 | #ifdef CONFIG_PM |
2752 | ||
4c2ef25f ML |
2753 | /* Do the card removal on suspend if card is assumed removeable |
2754 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2755 | to sync the card. | |
2756 | */ | |
2757 | int mmc_pm_notify(struct notifier_block *notify_block, | |
2758 | unsigned long mode, void *unused) | |
2759 | { | |
2760 | struct mmc_host *host = container_of( | |
2761 | notify_block, struct mmc_host, pm_notify); | |
2762 | unsigned long flags; | |
810caddb | 2763 | int err = 0; |
4c2ef25f ML |
2764 | |
2765 | switch (mode) { | |
2766 | case PM_HIBERNATION_PREPARE: | |
2767 | case PM_SUSPEND_PREPARE: | |
184af16b | 2768 | case PM_RESTORE_PREPARE: |
4c2ef25f ML |
2769 | spin_lock_irqsave(&host->lock, flags); |
2770 | host->rescan_disable = 1; | |
2771 | spin_unlock_irqrestore(&host->lock, flags); | |
2772 | cancel_delayed_work_sync(&host->detect); | |
2773 | ||
810caddb UH |
2774 | if (!host->bus_ops) |
2775 | break; | |
2776 | ||
2777 | /* Validate prerequisites for suspend */ | |
2778 | if (host->bus_ops->pre_suspend) | |
2779 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2780 | if (!err) |
4c2ef25f ML |
2781 | break; |
2782 | ||
0db13fc2 | 2783 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2784 | host->bus_ops->remove(host); |
0db13fc2 | 2785 | mmc_claim_host(host); |
4c2ef25f | 2786 | mmc_detach_bus(host); |
7f7e4129 | 2787 | mmc_power_off(host); |
4c2ef25f ML |
2788 | mmc_release_host(host); |
2789 | host->pm_flags = 0; | |
2790 | break; | |
2791 | ||
2792 | case PM_POST_SUSPEND: | |
2793 | case PM_POST_HIBERNATION: | |
274476f8 | 2794 | case PM_POST_RESTORE: |
4c2ef25f ML |
2795 | |
2796 | spin_lock_irqsave(&host->lock, flags); | |
2797 | host->rescan_disable = 0; | |
2798 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2799 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2800 | |
2801 | } | |
2802 | ||
2803 | return 0; | |
2804 | } | |
1da177e4 LT |
2805 | #endif |
2806 | ||
2220eedf KD |
2807 | /** |
2808 | * mmc_init_context_info() - init synchronization context | |
2809 | * @host: mmc host | |
2810 | * | |
2811 | * Init struct context_info needed to implement asynchronous | |
2812 | * request mechanism, used by mmc core, host driver and mmc requests | |
2813 | * supplier. | |
2814 | */ | |
2815 | void mmc_init_context_info(struct mmc_host *host) | |
2816 | { | |
2817 | spin_lock_init(&host->context_info.lock); | |
2818 | host->context_info.is_new_req = false; | |
2819 | host->context_info.is_done_rcv = false; | |
2820 | host->context_info.is_waiting_last_req = false; | |
2821 | init_waitqueue_head(&host->context_info.wait); | |
2822 | } | |
2823 | ||
ffce2e7e PO |
2824 | static int __init mmc_init(void) |
2825 | { | |
2826 | int ret; | |
2827 | ||
0d9ee5b2 | 2828 | workqueue = alloc_ordered_workqueue("kmmcd", 0); |
ffce2e7e PO |
2829 | if (!workqueue) |
2830 | return -ENOMEM; | |
2831 | ||
2832 | ret = mmc_register_bus(); | |
e29a7d73 PO |
2833 | if (ret) |
2834 | goto destroy_workqueue; | |
2835 | ||
2836 | ret = mmc_register_host_class(); | |
2837 | if (ret) | |
2838 | goto unregister_bus; | |
2839 | ||
2840 | ret = sdio_register_bus(); | |
2841 | if (ret) | |
2842 | goto unregister_host_class; | |
2843 | ||
2844 | return 0; | |
2845 | ||
2846 | unregister_host_class: | |
2847 | mmc_unregister_host_class(); | |
2848 | unregister_bus: | |
2849 | mmc_unregister_bus(); | |
2850 | destroy_workqueue: | |
2851 | destroy_workqueue(workqueue); | |
2852 | ||
ffce2e7e PO |
2853 | return ret; |
2854 | } | |
2855 | ||
2856 | static void __exit mmc_exit(void) | |
2857 | { | |
e29a7d73 | 2858 | sdio_unregister_bus(); |
ffce2e7e PO |
2859 | mmc_unregister_host_class(); |
2860 | mmc_unregister_bus(); | |
2861 | destroy_workqueue(workqueue); | |
2862 | } | |
2863 | ||
26074962 | 2864 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2865 | module_exit(mmc_exit); |
2866 | ||
1da177e4 | 2867 | MODULE_LICENSE("GPL"); |