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" |
da7fbe58 PO |
43 | |
44 | #include "mmc_ops.h" | |
45 | #include "sd_ops.h" | |
5c4e6f13 | 46 | #include "sdio_ops.h" |
1da177e4 | 47 | |
8fee476b TR |
48 | /* If the device is not responding */ |
49 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ | |
50 | ||
950d56ac JC |
51 | /* |
52 | * Background operations can take a long time, depending on the housekeeping | |
53 | * operations the card has to perform. | |
54 | */ | |
55 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ | |
56 | ||
ffce2e7e | 57 | static struct workqueue_struct *workqueue; |
fa550189 | 58 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
ffce2e7e | 59 | |
af517150 DB |
60 | /* |
61 | * Enabling software CRCs on the data blocks can be a significant (30%) | |
62 | * performance cost, and for other reasons may not always be desired. | |
63 | * So we allow it it to be disabled. | |
64 | */ | |
90ab5ee9 | 65 | bool use_spi_crc = 1; |
af517150 DB |
66 | module_param(use_spi_crc, bool, 0); |
67 | ||
ffce2e7e PO |
68 | /* |
69 | * Internal function. Schedule delayed work in the MMC work queue. | |
70 | */ | |
71 | static int mmc_schedule_delayed_work(struct delayed_work *work, | |
72 | unsigned long delay) | |
73 | { | |
74 | return queue_delayed_work(workqueue, work, delay); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Internal function. Flush all scheduled work from the MMC work queue. | |
79 | */ | |
80 | static void mmc_flush_scheduled_work(void) | |
81 | { | |
82 | flush_workqueue(workqueue); | |
83 | } | |
84 | ||
1b676f70 PF |
85 | #ifdef CONFIG_FAIL_MMC_REQUEST |
86 | ||
87 | /* | |
88 | * Internal function. Inject random data errors. | |
89 | * If mmc_data is NULL no errors are injected. | |
90 | */ | |
91 | static void mmc_should_fail_request(struct mmc_host *host, | |
92 | struct mmc_request *mrq) | |
93 | { | |
94 | struct mmc_command *cmd = mrq->cmd; | |
95 | struct mmc_data *data = mrq->data; | |
96 | static const int data_errors[] = { | |
97 | -ETIMEDOUT, | |
98 | -EILSEQ, | |
99 | -EIO, | |
100 | }; | |
101 | ||
102 | if (!data) | |
103 | return; | |
104 | ||
105 | if (cmd->error || data->error || | |
106 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) | |
107 | return; | |
108 | ||
2e744fcb AM |
109 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
110 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; | |
1b676f70 PF |
111 | } |
112 | ||
113 | #else /* CONFIG_FAIL_MMC_REQUEST */ | |
114 | ||
115 | static inline void mmc_should_fail_request(struct mmc_host *host, | |
116 | struct mmc_request *mrq) | |
117 | { | |
118 | } | |
119 | ||
120 | #endif /* CONFIG_FAIL_MMC_REQUEST */ | |
121 | ||
1da177e4 | 122 | /** |
fe10c6ab RK |
123 | * mmc_request_done - finish processing an MMC request |
124 | * @host: MMC host which completed request | |
125 | * @mrq: MMC request which request | |
1da177e4 LT |
126 | * |
127 | * MMC drivers should call this function when they have completed | |
fe10c6ab | 128 | * their processing of a request. |
1da177e4 LT |
129 | */ |
130 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) | |
131 | { | |
132 | struct mmc_command *cmd = mrq->cmd; | |
920e70c5 RK |
133 | int err = cmd->error; |
134 | ||
af517150 DB |
135 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
136 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) | |
137 | cmd->retries = 0; | |
138 | } | |
139 | ||
d3049504 | 140 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
08a7e1df AH |
141 | /* |
142 | * Request starter must handle retries - see | |
143 | * mmc_wait_for_req_done(). | |
144 | */ | |
145 | if (mrq->done) | |
146 | mrq->done(mrq); | |
e4d21708 | 147 | } else { |
1b676f70 PF |
148 | mmc_should_fail_request(host, mrq); |
149 | ||
af8350c7 PO |
150 | led_trigger_event(host->led, LED_OFF); |
151 | ||
fc75b708 AG |
152 | if (mrq->sbc) { |
153 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", | |
154 | mmc_hostname(host), mrq->sbc->opcode, | |
155 | mrq->sbc->error, | |
156 | mrq->sbc->resp[0], mrq->sbc->resp[1], | |
157 | mrq->sbc->resp[2], mrq->sbc->resp[3]); | |
158 | } | |
159 | ||
e4d21708 PO |
160 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
161 | mmc_hostname(host), cmd->opcode, err, | |
162 | cmd->resp[0], cmd->resp[1], | |
163 | cmd->resp[2], cmd->resp[3]); | |
164 | ||
165 | if (mrq->data) { | |
166 | pr_debug("%s: %d bytes transferred: %d\n", | |
167 | mmc_hostname(host), | |
168 | mrq->data->bytes_xfered, mrq->data->error); | |
169 | } | |
170 | ||
171 | if (mrq->stop) { | |
172 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", | |
173 | mmc_hostname(host), mrq->stop->opcode, | |
174 | mrq->stop->error, | |
175 | mrq->stop->resp[0], mrq->stop->resp[1], | |
176 | mrq->stop->resp[2], mrq->stop->resp[3]); | |
177 | } | |
178 | ||
179 | if (mrq->done) | |
180 | mrq->done(mrq); | |
04566831 | 181 | |
08c14071 | 182 | mmc_host_clk_release(host); |
1da177e4 LT |
183 | } |
184 | } | |
185 | ||
186 | EXPORT_SYMBOL(mmc_request_done); | |
187 | ||
39361851 | 188 | static void |
1da177e4 LT |
189 | mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
190 | { | |
976d9276 PO |
191 | #ifdef CONFIG_MMC_DEBUG |
192 | unsigned int i, sz; | |
a84756c5 | 193 | struct scatterlist *sg; |
976d9276 PO |
194 | #endif |
195 | ||
7b2fd4f2 JC |
196 | if (mrq->sbc) { |
197 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", | |
198 | mmc_hostname(host), mrq->sbc->opcode, | |
199 | mrq->sbc->arg, mrq->sbc->flags); | |
200 | } | |
201 | ||
920e70c5 RK |
202 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
203 | mmc_hostname(host), mrq->cmd->opcode, | |
204 | mrq->cmd->arg, mrq->cmd->flags); | |
1da177e4 | 205 | |
e4d21708 PO |
206 | if (mrq->data) { |
207 | pr_debug("%s: blksz %d blocks %d flags %08x " | |
208 | "tsac %d ms nsac %d\n", | |
209 | mmc_hostname(host), mrq->data->blksz, | |
210 | mrq->data->blocks, mrq->data->flags, | |
ce252edd | 211 | mrq->data->timeout_ns / 1000000, |
e4d21708 PO |
212 | mrq->data->timeout_clks); |
213 | } | |
214 | ||
215 | if (mrq->stop) { | |
216 | pr_debug("%s: CMD%u arg %08x flags %08x\n", | |
217 | mmc_hostname(host), mrq->stop->opcode, | |
218 | mrq->stop->arg, mrq->stop->flags); | |
219 | } | |
220 | ||
f22ee4ed | 221 | WARN_ON(!host->claimed); |
1da177e4 LT |
222 | |
223 | mrq->cmd->error = 0; | |
224 | mrq->cmd->mrq = mrq; | |
cce411e6 AG |
225 | if (mrq->sbc) { |
226 | mrq->sbc->error = 0; | |
227 | mrq->sbc->mrq = mrq; | |
228 | } | |
1da177e4 | 229 | if (mrq->data) { |
fe4a3c7a | 230 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
55db890a PO |
231 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
232 | BUG_ON(mrq->data->blocks * mrq->data->blksz > | |
233 | host->max_req_size); | |
fe4a3c7a | 234 | |
976d9276 PO |
235 | #ifdef CONFIG_MMC_DEBUG |
236 | sz = 0; | |
a84756c5 PO |
237 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
238 | sz += sg->length; | |
976d9276 PO |
239 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
240 | #endif | |
241 | ||
1da177e4 LT |
242 | mrq->cmd->data = mrq->data; |
243 | mrq->data->error = 0; | |
244 | mrq->data->mrq = mrq; | |
245 | if (mrq->stop) { | |
246 | mrq->data->stop = mrq->stop; | |
247 | mrq->stop->error = 0; | |
248 | mrq->stop->mrq = mrq; | |
249 | } | |
250 | } | |
08c14071 | 251 | mmc_host_clk_hold(host); |
66c036e0 | 252 | led_trigger_event(host->led, LED_FULL); |
1da177e4 LT |
253 | host->ops->request(host, mrq); |
254 | } | |
255 | ||
950d56ac JC |
256 | /** |
257 | * mmc_start_bkops - start BKOPS for supported cards | |
258 | * @card: MMC card to start BKOPS | |
259 | * @form_exception: A flag to indicate if this function was | |
260 | * called due to an exception raised by the card | |
261 | * | |
262 | * Start background operations whenever requested. | |
263 | * When the urgent BKOPS bit is set in a R1 command response | |
264 | * then background operations should be started immediately. | |
265 | */ | |
266 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) | |
267 | { | |
268 | int err; | |
269 | int timeout; | |
270 | bool use_busy_signal; | |
271 | ||
272 | BUG_ON(!card); | |
273 | ||
274 | if (!card->ext_csd.bkops_en || mmc_card_doing_bkops(card)) | |
275 | return; | |
276 | ||
277 | err = mmc_read_bkops_status(card); | |
278 | if (err) { | |
279 | pr_err("%s: Failed to read bkops status: %d\n", | |
280 | mmc_hostname(card->host), err); | |
281 | return; | |
282 | } | |
283 | ||
284 | if (!card->ext_csd.raw_bkops_status) | |
285 | return; | |
286 | ||
287 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && | |
288 | from_exception) | |
289 | return; | |
290 | ||
291 | mmc_claim_host(card->host); | |
292 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { | |
293 | timeout = MMC_BKOPS_MAX_TIMEOUT; | |
294 | use_busy_signal = true; | |
295 | } else { | |
296 | timeout = 0; | |
297 | use_busy_signal = false; | |
298 | } | |
299 | ||
300 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
4509f847 UH |
301 | EXT_CSD_BKOPS_START, 1, timeout, |
302 | use_busy_signal, true, false); | |
950d56ac JC |
303 | if (err) { |
304 | pr_warn("%s: Error %d starting bkops\n", | |
305 | mmc_hostname(card->host), err); | |
306 | goto out; | |
307 | } | |
308 | ||
309 | /* | |
310 | * For urgent bkops status (LEVEL_2 and more) | |
311 | * bkops executed synchronously, otherwise | |
312 | * the operation is in progress | |
313 | */ | |
314 | if (!use_busy_signal) | |
315 | mmc_card_set_doing_bkops(card); | |
316 | out: | |
317 | mmc_release_host(card->host); | |
318 | } | |
319 | EXPORT_SYMBOL(mmc_start_bkops); | |
320 | ||
2220eedf KD |
321 | /* |
322 | * mmc_wait_data_done() - done callback for data request | |
323 | * @mrq: done data request | |
324 | * | |
325 | * Wakes up mmc context, passed as a callback to host controller driver | |
326 | */ | |
327 | static void mmc_wait_data_done(struct mmc_request *mrq) | |
328 | { | |
329 | mrq->host->context_info.is_done_rcv = true; | |
330 | wake_up_interruptible(&mrq->host->context_info.wait); | |
331 | } | |
332 | ||
1da177e4 LT |
333 | static void mmc_wait_done(struct mmc_request *mrq) |
334 | { | |
aa8b683a PF |
335 | complete(&mrq->completion); |
336 | } | |
337 | ||
2220eedf KD |
338 | /* |
339 | *__mmc_start_data_req() - starts data request | |
340 | * @host: MMC host to start the request | |
341 | * @mrq: data request to start | |
342 | * | |
343 | * Sets the done callback to be called when request is completed by the card. | |
344 | * Starts data mmc request execution | |
345 | */ | |
346 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) | |
347 | { | |
348 | mrq->done = mmc_wait_data_done; | |
349 | mrq->host = host; | |
350 | if (mmc_card_removed(host->card)) { | |
351 | mrq->cmd->error = -ENOMEDIUM; | |
9b844961 | 352 | mmc_wait_data_done(mrq); |
2220eedf KD |
353 | return -ENOMEDIUM; |
354 | } | |
355 | mmc_start_request(host, mrq); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
956d9fd5 | 360 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
aa8b683a PF |
361 | { |
362 | init_completion(&mrq->completion); | |
363 | mrq->done = mmc_wait_done; | |
d3049504 AH |
364 | if (mmc_card_removed(host->card)) { |
365 | mrq->cmd->error = -ENOMEDIUM; | |
366 | complete(&mrq->completion); | |
956d9fd5 | 367 | return -ENOMEDIUM; |
d3049504 | 368 | } |
aa8b683a | 369 | mmc_start_request(host, mrq); |
956d9fd5 | 370 | return 0; |
aa8b683a PF |
371 | } |
372 | ||
2220eedf KD |
373 | /* |
374 | * mmc_wait_for_data_req_done() - wait for request completed | |
375 | * @host: MMC host to prepare the command. | |
376 | * @mrq: MMC request to wait for | |
377 | * | |
378 | * Blocks MMC context till host controller will ack end of data request | |
379 | * execution or new request notification arrives from the block layer. | |
380 | * Handles command retries. | |
381 | * | |
382 | * Returns enum mmc_blk_status after checking errors. | |
383 | */ | |
384 | static int mmc_wait_for_data_req_done(struct mmc_host *host, | |
385 | struct mmc_request *mrq, | |
386 | struct mmc_async_req *next_req) | |
387 | { | |
388 | struct mmc_command *cmd; | |
389 | struct mmc_context_info *context_info = &host->context_info; | |
390 | int err; | |
391 | unsigned long flags; | |
392 | ||
393 | while (1) { | |
394 | wait_event_interruptible(context_info->wait, | |
395 | (context_info->is_done_rcv || | |
396 | context_info->is_new_req)); | |
397 | spin_lock_irqsave(&context_info->lock, flags); | |
398 | context_info->is_waiting_last_req = false; | |
399 | spin_unlock_irqrestore(&context_info->lock, flags); | |
400 | if (context_info->is_done_rcv) { | |
401 | context_info->is_done_rcv = false; | |
402 | context_info->is_new_req = false; | |
403 | cmd = mrq->cmd; | |
775a9362 | 404 | |
2220eedf KD |
405 | if (!cmd->error || !cmd->retries || |
406 | mmc_card_removed(host->card)) { | |
407 | err = host->areq->err_check(host->card, | |
408 | host->areq); | |
409 | break; /* return err */ | |
410 | } else { | |
411 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", | |
412 | mmc_hostname(host), | |
413 | cmd->opcode, cmd->error); | |
414 | cmd->retries--; | |
415 | cmd->error = 0; | |
416 | host->ops->request(host, mrq); | |
417 | continue; /* wait for done/new event again */ | |
418 | } | |
419 | } else if (context_info->is_new_req) { | |
420 | context_info->is_new_req = false; | |
421 | if (!next_req) { | |
422 | err = MMC_BLK_NEW_REQUEST; | |
423 | break; /* return err */ | |
424 | } | |
425 | } | |
426 | } | |
427 | return err; | |
428 | } | |
429 | ||
aa8b683a PF |
430 | static void mmc_wait_for_req_done(struct mmc_host *host, |
431 | struct mmc_request *mrq) | |
432 | { | |
08a7e1df AH |
433 | struct mmc_command *cmd; |
434 | ||
435 | while (1) { | |
436 | wait_for_completion(&mrq->completion); | |
437 | ||
438 | cmd = mrq->cmd; | |
775a9362 ME |
439 | |
440 | /* | |
441 | * If host has timed out waiting for the sanitize | |
442 | * to complete, card might be still in programming state | |
443 | * so let's try to bring the card out of programming | |
444 | * state. | |
445 | */ | |
446 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { | |
447 | if (!mmc_interrupt_hpi(host->card)) { | |
6606110d JP |
448 | pr_warn("%s: %s: Interrupted sanitize\n", |
449 | mmc_hostname(host), __func__); | |
775a9362 ME |
450 | cmd->error = 0; |
451 | break; | |
452 | } else { | |
453 | pr_err("%s: %s: Failed to interrupt sanitize\n", | |
454 | mmc_hostname(host), __func__); | |
455 | } | |
456 | } | |
d3049504 AH |
457 | if (!cmd->error || !cmd->retries || |
458 | mmc_card_removed(host->card)) | |
08a7e1df AH |
459 | break; |
460 | ||
461 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", | |
462 | mmc_hostname(host), cmd->opcode, cmd->error); | |
463 | cmd->retries--; | |
464 | cmd->error = 0; | |
465 | host->ops->request(host, mrq); | |
466 | } | |
aa8b683a PF |
467 | } |
468 | ||
469 | /** | |
470 | * mmc_pre_req - Prepare for a new request | |
471 | * @host: MMC host to prepare command | |
472 | * @mrq: MMC request to prepare for | |
473 | * @is_first_req: true if there is no previous started request | |
474 | * that may run in parellel to this call, otherwise false | |
475 | * | |
476 | * mmc_pre_req() is called in prior to mmc_start_req() to let | |
477 | * host prepare for the new request. Preparation of a request may be | |
478 | * performed while another request is running on the host. | |
479 | */ | |
480 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, | |
481 | bool is_first_req) | |
482 | { | |
2c4967f7 SRT |
483 | if (host->ops->pre_req) { |
484 | mmc_host_clk_hold(host); | |
aa8b683a | 485 | host->ops->pre_req(host, mrq, is_first_req); |
2c4967f7 SRT |
486 | mmc_host_clk_release(host); |
487 | } | |
aa8b683a PF |
488 | } |
489 | ||
490 | /** | |
491 | * mmc_post_req - Post process a completed request | |
492 | * @host: MMC host to post process command | |
493 | * @mrq: MMC request to post process for | |
494 | * @err: Error, if non zero, clean up any resources made in pre_req | |
495 | * | |
496 | * Let the host post process a completed request. Post processing of | |
497 | * a request may be performed while another reuqest is running. | |
498 | */ | |
499 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, | |
500 | int err) | |
501 | { | |
2c4967f7 SRT |
502 | if (host->ops->post_req) { |
503 | mmc_host_clk_hold(host); | |
aa8b683a | 504 | host->ops->post_req(host, mrq, err); |
2c4967f7 SRT |
505 | mmc_host_clk_release(host); |
506 | } | |
1da177e4 LT |
507 | } |
508 | ||
aa8b683a PF |
509 | /** |
510 | * mmc_start_req - start a non-blocking request | |
511 | * @host: MMC host to start command | |
512 | * @areq: async request to start | |
513 | * @error: out parameter returns 0 for success, otherwise non zero | |
514 | * | |
515 | * Start a new MMC custom command request for a host. | |
516 | * If there is on ongoing async request wait for completion | |
517 | * of that request and start the new one and return. | |
518 | * Does not wait for the new request to complete. | |
519 | * | |
520 | * Returns the completed request, NULL in case of none completed. | |
521 | * Wait for the an ongoing request (previoulsy started) to complete and | |
522 | * return the completed request. If there is no ongoing request, NULL | |
523 | * is returned without waiting. NULL is not an error condition. | |
524 | */ | |
525 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, | |
526 | struct mmc_async_req *areq, int *error) | |
527 | { | |
528 | int err = 0; | |
956d9fd5 | 529 | int start_err = 0; |
aa8b683a PF |
530 | struct mmc_async_req *data = host->areq; |
531 | ||
532 | /* Prepare a new request */ | |
533 | if (areq) | |
534 | mmc_pre_req(host, areq->mrq, !host->areq); | |
535 | ||
536 | if (host->areq) { | |
f5c2758f JC |
537 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
538 | if (err == MMC_BLK_NEW_REQUEST) { | |
539 | if (error) | |
540 | *error = err; | |
541 | /* | |
542 | * The previous request was not completed, | |
543 | * nothing to return | |
544 | */ | |
545 | return NULL; | |
546 | } | |
950d56ac JC |
547 | /* |
548 | * Check BKOPS urgency for each R1 response | |
549 | */ | |
550 | if (host->card && mmc_card_mmc(host->card) && | |
551 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || | |
552 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && | |
64b12a68 SK |
553 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
554 | ||
555 | /* Cancel the prepared request */ | |
556 | if (areq) | |
557 | mmc_post_req(host, areq->mrq, -EINVAL); | |
558 | ||
950d56ac | 559 | mmc_start_bkops(host->card, true); |
64b12a68 SK |
560 | |
561 | /* prepare the request again */ | |
562 | if (areq) | |
563 | mmc_pre_req(host, areq->mrq, !host->areq); | |
564 | } | |
aa8b683a PF |
565 | } |
566 | ||
956d9fd5 | 567 | if (!err && areq) |
2220eedf | 568 | start_err = __mmc_start_data_req(host, areq->mrq); |
aa8b683a PF |
569 | |
570 | if (host->areq) | |
571 | mmc_post_req(host, host->areq->mrq, 0); | |
572 | ||
956d9fd5 UH |
573 | /* Cancel a prepared request if it was not started. */ |
574 | if ((err || start_err) && areq) | |
f5c2758f | 575 | mmc_post_req(host, areq->mrq, -EINVAL); |
956d9fd5 UH |
576 | |
577 | if (err) | |
578 | host->areq = NULL; | |
579 | else | |
580 | host->areq = areq; | |
581 | ||
aa8b683a PF |
582 | if (error) |
583 | *error = err; | |
584 | return data; | |
585 | } | |
586 | EXPORT_SYMBOL(mmc_start_req); | |
587 | ||
67a61c48 PO |
588 | /** |
589 | * mmc_wait_for_req - start a request and wait for completion | |
590 | * @host: MMC host to start command | |
591 | * @mrq: MMC request to start | |
592 | * | |
593 | * Start a new MMC custom command request for a host, and wait | |
594 | * for the command to complete. Does not attempt to parse the | |
595 | * response. | |
596 | */ | |
597 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) | |
1da177e4 | 598 | { |
aa8b683a PF |
599 | __mmc_start_req(host, mrq); |
600 | mmc_wait_for_req_done(host, mrq); | |
1da177e4 | 601 | } |
1da177e4 LT |
602 | EXPORT_SYMBOL(mmc_wait_for_req); |
603 | ||
eb0d8f13 JC |
604 | /** |
605 | * mmc_interrupt_hpi - Issue for High priority Interrupt | |
606 | * @card: the MMC card associated with the HPI transfer | |
607 | * | |
608 | * Issued High Priority Interrupt, and check for card status | |
950d56ac | 609 | * until out-of prg-state. |
eb0d8f13 JC |
610 | */ |
611 | int mmc_interrupt_hpi(struct mmc_card *card) | |
612 | { | |
613 | int err; | |
614 | u32 status; | |
6af9e96e | 615 | unsigned long prg_wait; |
eb0d8f13 JC |
616 | |
617 | BUG_ON(!card); | |
618 | ||
619 | if (!card->ext_csd.hpi_en) { | |
620 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); | |
621 | return 1; | |
622 | } | |
623 | ||
624 | mmc_claim_host(card->host); | |
625 | err = mmc_send_status(card, &status); | |
626 | if (err) { | |
627 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); | |
628 | goto out; | |
629 | } | |
630 | ||
6af9e96e V |
631 | switch (R1_CURRENT_STATE(status)) { |
632 | case R1_STATE_IDLE: | |
633 | case R1_STATE_READY: | |
634 | case R1_STATE_STBY: | |
211d4fe5 | 635 | case R1_STATE_TRAN: |
6af9e96e | 636 | /* |
211d4fe5 | 637 | * In idle and transfer states, HPI is not needed and the caller |
6af9e96e V |
638 | * can issue the next intended command immediately |
639 | */ | |
640 | goto out; | |
641 | case R1_STATE_PRG: | |
642 | break; | |
643 | default: | |
644 | /* In all other states, it's illegal to issue HPI */ | |
645 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", | |
646 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); | |
647 | err = -EINVAL; | |
648 | goto out; | |
649 | } | |
650 | ||
651 | err = mmc_send_hpi_cmd(card, &status); | |
652 | if (err) | |
653 | goto out; | |
654 | ||
655 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); | |
656 | do { | |
657 | err = mmc_send_status(card, &status); | |
658 | ||
659 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) | |
660 | break; | |
661 | if (time_after(jiffies, prg_wait)) | |
662 | err = -ETIMEDOUT; | |
663 | } while (!err); | |
eb0d8f13 JC |
664 | |
665 | out: | |
666 | mmc_release_host(card->host); | |
667 | return err; | |
668 | } | |
669 | EXPORT_SYMBOL(mmc_interrupt_hpi); | |
670 | ||
1da177e4 LT |
671 | /** |
672 | * mmc_wait_for_cmd - start a command and wait for completion | |
673 | * @host: MMC host to start command | |
674 | * @cmd: MMC command to start | |
675 | * @retries: maximum number of retries | |
676 | * | |
677 | * Start a new MMC command for a host, and wait for the command | |
678 | * to complete. Return any error that occurred while the command | |
679 | * was executing. Do not attempt to parse the response. | |
680 | */ | |
681 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) | |
682 | { | |
ad5fd972 | 683 | struct mmc_request mrq = {NULL}; |
1da177e4 | 684 | |
d84075c8 | 685 | WARN_ON(!host->claimed); |
1da177e4 | 686 | |
1da177e4 LT |
687 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
688 | cmd->retries = retries; | |
689 | ||
690 | mrq.cmd = cmd; | |
691 | cmd->data = NULL; | |
692 | ||
693 | mmc_wait_for_req(host, &mrq); | |
694 | ||
695 | return cmd->error; | |
696 | } | |
697 | ||
698 | EXPORT_SYMBOL(mmc_wait_for_cmd); | |
699 | ||
950d56ac JC |
700 | /** |
701 | * mmc_stop_bkops - stop ongoing BKOPS | |
702 | * @card: MMC card to check BKOPS | |
703 | * | |
704 | * Send HPI command to stop ongoing background operations to | |
705 | * allow rapid servicing of foreground operations, e.g. read/ | |
706 | * writes. Wait until the card comes out of the programming state | |
707 | * to avoid errors in servicing read/write requests. | |
708 | */ | |
709 | int mmc_stop_bkops(struct mmc_card *card) | |
710 | { | |
711 | int err = 0; | |
712 | ||
713 | BUG_ON(!card); | |
714 | err = mmc_interrupt_hpi(card); | |
715 | ||
716 | /* | |
717 | * If err is EINVAL, we can't issue an HPI. | |
718 | * It should complete the BKOPS. | |
719 | */ | |
720 | if (!err || (err == -EINVAL)) { | |
721 | mmc_card_clr_doing_bkops(card); | |
722 | err = 0; | |
723 | } | |
724 | ||
725 | return err; | |
726 | } | |
727 | EXPORT_SYMBOL(mmc_stop_bkops); | |
728 | ||
729 | int mmc_read_bkops_status(struct mmc_card *card) | |
730 | { | |
731 | int err; | |
732 | u8 *ext_csd; | |
733 | ||
734 | /* | |
735 | * In future work, we should consider storing the entire ext_csd. | |
736 | */ | |
737 | ext_csd = kmalloc(512, GFP_KERNEL); | |
738 | if (!ext_csd) { | |
739 | pr_err("%s: could not allocate buffer to receive the ext_csd.\n", | |
740 | mmc_hostname(card->host)); | |
741 | return -ENOMEM; | |
742 | } | |
743 | ||
744 | mmc_claim_host(card->host); | |
745 | err = mmc_send_ext_csd(card, ext_csd); | |
746 | mmc_release_host(card->host); | |
747 | if (err) | |
748 | goto out; | |
749 | ||
750 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; | |
751 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; | |
752 | out: | |
753 | kfree(ext_csd); | |
754 | return err; | |
755 | } | |
756 | EXPORT_SYMBOL(mmc_read_bkops_status); | |
757 | ||
d773d725 RK |
758 | /** |
759 | * mmc_set_data_timeout - set the timeout for a data command | |
760 | * @data: data phase for command | |
761 | * @card: the MMC card associated with the data transfer | |
67a61c48 PO |
762 | * |
763 | * Computes the data timeout parameters according to the | |
764 | * correct algorithm given the card type. | |
d773d725 | 765 | */ |
b146d26a | 766 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
d773d725 RK |
767 | { |
768 | unsigned int mult; | |
769 | ||
e6f918bf PO |
770 | /* |
771 | * SDIO cards only define an upper 1 s limit on access. | |
772 | */ | |
773 | if (mmc_card_sdio(card)) { | |
774 | data->timeout_ns = 1000000000; | |
775 | data->timeout_clks = 0; | |
776 | return; | |
777 | } | |
778 | ||
d773d725 RK |
779 | /* |
780 | * SD cards use a 100 multiplier rather than 10 | |
781 | */ | |
782 | mult = mmc_card_sd(card) ? 100 : 10; | |
783 | ||
784 | /* | |
785 | * Scale up the multiplier (and therefore the timeout) by | |
786 | * the r2w factor for writes. | |
787 | */ | |
b146d26a | 788 | if (data->flags & MMC_DATA_WRITE) |
d773d725 RK |
789 | mult <<= card->csd.r2w_factor; |
790 | ||
791 | data->timeout_ns = card->csd.tacc_ns * mult; | |
792 | data->timeout_clks = card->csd.tacc_clks * mult; | |
793 | ||
794 | /* | |
795 | * SD cards also have an upper limit on the timeout. | |
796 | */ | |
797 | if (mmc_card_sd(card)) { | |
798 | unsigned int timeout_us, limit_us; | |
799 | ||
800 | timeout_us = data->timeout_ns / 1000; | |
e9b86841 LW |
801 | if (mmc_host_clk_rate(card->host)) |
802 | timeout_us += data->timeout_clks * 1000 / | |
803 | (mmc_host_clk_rate(card->host) / 1000); | |
d773d725 | 804 | |
b146d26a | 805 | if (data->flags & MMC_DATA_WRITE) |
493890e7 | 806 | /* |
3bdc9ba8 PW |
807 | * The MMC spec "It is strongly recommended |
808 | * for hosts to implement more than 500ms | |
809 | * timeout value even if the card indicates | |
810 | * the 250ms maximum busy length." Even the | |
811 | * previous value of 300ms is known to be | |
812 | * insufficient for some cards. | |
493890e7 | 813 | */ |
3bdc9ba8 | 814 | limit_us = 3000000; |
d773d725 RK |
815 | else |
816 | limit_us = 100000; | |
817 | ||
fba68bd2 PL |
818 | /* |
819 | * SDHC cards always use these fixed values. | |
820 | */ | |
821 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { | |
d773d725 RK |
822 | data->timeout_ns = limit_us * 1000; |
823 | data->timeout_clks = 0; | |
824 | } | |
f7bf11a3 SW |
825 | |
826 | /* assign limit value if invalid */ | |
827 | if (timeout_us == 0) | |
828 | data->timeout_ns = limit_us * 1000; | |
d773d725 | 829 | } |
6de5fc9c SNX |
830 | |
831 | /* | |
832 | * Some cards require longer data read timeout than indicated in CSD. | |
833 | * Address this by setting the read timeout to a "reasonably high" | |
834 | * value. For the cards tested, 300ms has proven enough. If necessary, | |
835 | * this value can be increased if other problematic cards require this. | |
836 | */ | |
837 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { | |
838 | data->timeout_ns = 300000000; | |
839 | data->timeout_clks = 0; | |
840 | } | |
841 | ||
c0c88871 WM |
842 | /* |
843 | * Some cards need very high timeouts if driven in SPI mode. | |
844 | * The worst observed timeout was 900ms after writing a | |
845 | * continuous stream of data until the internal logic | |
846 | * overflowed. | |
847 | */ | |
848 | if (mmc_host_is_spi(card->host)) { | |
849 | if (data->flags & MMC_DATA_WRITE) { | |
850 | if (data->timeout_ns < 1000000000) | |
851 | data->timeout_ns = 1000000000; /* 1s */ | |
852 | } else { | |
853 | if (data->timeout_ns < 100000000) | |
854 | data->timeout_ns = 100000000; /* 100ms */ | |
855 | } | |
856 | } | |
d773d725 RK |
857 | } |
858 | EXPORT_SYMBOL(mmc_set_data_timeout); | |
859 | ||
ad3868b2 PO |
860 | /** |
861 | * mmc_align_data_size - pads a transfer size to a more optimal value | |
862 | * @card: the MMC card associated with the data transfer | |
863 | * @sz: original transfer size | |
864 | * | |
865 | * Pads the original data size with a number of extra bytes in | |
866 | * order to avoid controller bugs and/or performance hits | |
867 | * (e.g. some controllers revert to PIO for certain sizes). | |
868 | * | |
869 | * Returns the improved size, which might be unmodified. | |
870 | * | |
871 | * Note that this function is only relevant when issuing a | |
872 | * single scatter gather entry. | |
873 | */ | |
874 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) | |
875 | { | |
876 | /* | |
877 | * FIXME: We don't have a system for the controller to tell | |
878 | * the core about its problems yet, so for now we just 32-bit | |
879 | * align the size. | |
880 | */ | |
881 | sz = ((sz + 3) / 4) * 4; | |
882 | ||
883 | return sz; | |
884 | } | |
885 | EXPORT_SYMBOL(mmc_align_data_size); | |
886 | ||
1da177e4 | 887 | /** |
2342f332 | 888 | * __mmc_claim_host - exclusively claim a host |
1da177e4 | 889 | * @host: mmc host to claim |
2342f332 | 890 | * @abort: whether or not the operation should be aborted |
1da177e4 | 891 | * |
2342f332 NP |
892 | * Claim a host for a set of operations. If @abort is non null and |
893 | * dereference a non-zero value then this will return prematurely with | |
894 | * that non-zero value without acquiring the lock. Returns zero | |
895 | * with the lock held otherwise. | |
1da177e4 | 896 | */ |
2342f332 | 897 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
1da177e4 LT |
898 | { |
899 | DECLARE_WAITQUEUE(wait, current); | |
900 | unsigned long flags; | |
2342f332 | 901 | int stop; |
1da177e4 | 902 | |
cf795bfb PO |
903 | might_sleep(); |
904 | ||
1da177e4 LT |
905 | add_wait_queue(&host->wq, &wait); |
906 | spin_lock_irqsave(&host->lock, flags); | |
907 | while (1) { | |
908 | set_current_state(TASK_UNINTERRUPTIBLE); | |
2342f332 | 909 | stop = abort ? atomic_read(abort) : 0; |
319a3f14 | 910 | if (stop || !host->claimed || host->claimer == current) |
1da177e4 LT |
911 | break; |
912 | spin_unlock_irqrestore(&host->lock, flags); | |
913 | schedule(); | |
914 | spin_lock_irqsave(&host->lock, flags); | |
915 | } | |
916 | set_current_state(TASK_RUNNING); | |
319a3f14 | 917 | if (!stop) { |
2342f332 | 918 | host->claimed = 1; |
319a3f14 AH |
919 | host->claimer = current; |
920 | host->claim_cnt += 1; | |
921 | } else | |
2342f332 | 922 | wake_up(&host->wq); |
1da177e4 LT |
923 | spin_unlock_irqrestore(&host->lock, flags); |
924 | remove_wait_queue(&host->wq, &wait); | |
907d2e7c AH |
925 | if (host->ops->enable && !stop && host->claim_cnt == 1) |
926 | host->ops->enable(host); | |
2342f332 | 927 | return stop; |
1da177e4 LT |
928 | } |
929 | ||
2342f332 | 930 | EXPORT_SYMBOL(__mmc_claim_host); |
8ea926b2 | 931 | |
ab1efd27 | 932 | /** |
907d2e7c | 933 | * mmc_release_host - release a host |
ab1efd27 UH |
934 | * @host: mmc host to release |
935 | * | |
907d2e7c AH |
936 | * Release a MMC host, allowing others to claim the host |
937 | * for their operations. | |
ab1efd27 | 938 | */ |
907d2e7c | 939 | void mmc_release_host(struct mmc_host *host) |
8ea926b2 AH |
940 | { |
941 | unsigned long flags; | |
942 | ||
907d2e7c AH |
943 | WARN_ON(!host->claimed); |
944 | ||
945 | if (host->ops->disable && host->claim_cnt == 1) | |
946 | host->ops->disable(host); | |
947 | ||
8ea926b2 | 948 | spin_lock_irqsave(&host->lock, flags); |
319a3f14 AH |
949 | if (--host->claim_cnt) { |
950 | /* Release for nested claim */ | |
951 | spin_unlock_irqrestore(&host->lock, flags); | |
952 | } else { | |
953 | host->claimed = 0; | |
954 | host->claimer = NULL; | |
955 | spin_unlock_irqrestore(&host->lock, flags); | |
956 | wake_up(&host->wq); | |
957 | } | |
8ea926b2 | 958 | } |
1da177e4 LT |
959 | EXPORT_SYMBOL(mmc_release_host); |
960 | ||
e94cfef6 UH |
961 | /* |
962 | * This is a helper function, which fetches a runtime pm reference for the | |
963 | * card device and also claims the host. | |
964 | */ | |
965 | void mmc_get_card(struct mmc_card *card) | |
966 | { | |
967 | pm_runtime_get_sync(&card->dev); | |
968 | mmc_claim_host(card->host); | |
969 | } | |
970 | EXPORT_SYMBOL(mmc_get_card); | |
971 | ||
972 | /* | |
973 | * This is a helper function, which releases the host and drops the runtime | |
974 | * pm reference for the card device. | |
975 | */ | |
976 | void mmc_put_card(struct mmc_card *card) | |
977 | { | |
978 | mmc_release_host(card->host); | |
979 | pm_runtime_mark_last_busy(&card->dev); | |
980 | pm_runtime_put_autosuspend(&card->dev); | |
981 | } | |
982 | EXPORT_SYMBOL(mmc_put_card); | |
983 | ||
7ea239d9 PO |
984 | /* |
985 | * Internal function that does the actual ios call to the host driver, | |
986 | * optionally printing some debug output. | |
987 | */ | |
920e70c5 RK |
988 | static inline void mmc_set_ios(struct mmc_host *host) |
989 | { | |
990 | struct mmc_ios *ios = &host->ios; | |
991 | ||
cd9277c0 PO |
992 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
993 | "width %u timing %u\n", | |
920e70c5 RK |
994 | mmc_hostname(host), ios->clock, ios->bus_mode, |
995 | ios->power_mode, ios->chip_select, ios->vdd, | |
cd9277c0 | 996 | ios->bus_width, ios->timing); |
fba68bd2 | 997 | |
04566831 LW |
998 | if (ios->clock > 0) |
999 | mmc_set_ungated(host); | |
920e70c5 RK |
1000 | host->ops->set_ios(host, ios); |
1001 | } | |
1002 | ||
7ea239d9 PO |
1003 | /* |
1004 | * Control chip select pin on a host. | |
1005 | */ | |
da7fbe58 | 1006 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
1da177e4 | 1007 | { |
778e277c | 1008 | mmc_host_clk_hold(host); |
da7fbe58 PO |
1009 | host->ios.chip_select = mode; |
1010 | mmc_set_ios(host); | |
778e277c | 1011 | mmc_host_clk_release(host); |
1da177e4 LT |
1012 | } |
1013 | ||
7ea239d9 PO |
1014 | /* |
1015 | * Sets the host clock to the highest possible frequency that | |
1016 | * is below "hz". | |
1017 | */ | |
778e277c | 1018 | static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) |
7ea239d9 | 1019 | { |
6a98f1e8 | 1020 | WARN_ON(hz && hz < host->f_min); |
7ea239d9 PO |
1021 | |
1022 | if (hz > host->f_max) | |
1023 | hz = host->f_max; | |
1024 | ||
1025 | host->ios.clock = hz; | |
1026 | mmc_set_ios(host); | |
1027 | } | |
1028 | ||
778e277c MW |
1029 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
1030 | { | |
1031 | mmc_host_clk_hold(host); | |
1032 | __mmc_set_clock(host, hz); | |
1033 | mmc_host_clk_release(host); | |
1034 | } | |
1035 | ||
04566831 LW |
1036 | #ifdef CONFIG_MMC_CLKGATE |
1037 | /* | |
1038 | * This gates the clock by setting it to 0 Hz. | |
1039 | */ | |
1040 | void mmc_gate_clock(struct mmc_host *host) | |
1041 | { | |
1042 | unsigned long flags; | |
1043 | ||
1044 | spin_lock_irqsave(&host->clk_lock, flags); | |
1045 | host->clk_old = host->ios.clock; | |
1046 | host->ios.clock = 0; | |
1047 | host->clk_gated = true; | |
1048 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1049 | mmc_set_ios(host); | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * This restores the clock from gating by using the cached | |
1054 | * clock value. | |
1055 | */ | |
1056 | void mmc_ungate_clock(struct mmc_host *host) | |
1057 | { | |
1058 | /* | |
1059 | * We should previously have gated the clock, so the clock shall | |
1060 | * be 0 here! The clock may however be 0 during initialization, | |
1061 | * when some request operations are performed before setting | |
1062 | * the frequency. When ungate is requested in that situation | |
1063 | * we just ignore the call. | |
1064 | */ | |
1065 | if (host->clk_old) { | |
1066 | BUG_ON(host->ios.clock); | |
1067 | /* This call will also set host->clk_gated to false */ | |
778e277c | 1068 | __mmc_set_clock(host, host->clk_old); |
04566831 LW |
1069 | } |
1070 | } | |
1071 | ||
1072 | void mmc_set_ungated(struct mmc_host *host) | |
1073 | { | |
1074 | unsigned long flags; | |
1075 | ||
1076 | /* | |
1077 | * We've been given a new frequency while the clock is gated, | |
1078 | * so make sure we regard this as ungating it. | |
1079 | */ | |
1080 | spin_lock_irqsave(&host->clk_lock, flags); | |
1081 | host->clk_gated = false; | |
1082 | spin_unlock_irqrestore(&host->clk_lock, flags); | |
1083 | } | |
1084 | ||
1085 | #else | |
1086 | void mmc_set_ungated(struct mmc_host *host) | |
1087 | { | |
1088 | } | |
1089 | #endif | |
1090 | ||
7ea239d9 PO |
1091 | /* |
1092 | * Change the bus mode (open drain/push-pull) of a host. | |
1093 | */ | |
1094 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) | |
1095 | { | |
778e277c | 1096 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1097 | host->ios.bus_mode = mode; |
1098 | mmc_set_ios(host); | |
778e277c | 1099 | mmc_host_clk_release(host); |
7ea239d9 PO |
1100 | } |
1101 | ||
0f8d8ea6 AH |
1102 | /* |
1103 | * Change data bus width of a host. | |
1104 | */ | |
1105 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) | |
1106 | { | |
778e277c | 1107 | mmc_host_clk_hold(host); |
4c4cb171 PR |
1108 | host->ios.bus_width = width; |
1109 | mmc_set_ios(host); | |
778e277c | 1110 | mmc_host_clk_release(host); |
0f8d8ea6 AH |
1111 | } |
1112 | ||
86e8286a AV |
1113 | /** |
1114 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number | |
1115 | * @vdd: voltage (mV) | |
1116 | * @low_bits: prefer low bits in boundary cases | |
1117 | * | |
1118 | * This function returns the OCR bit number according to the provided @vdd | |
1119 | * value. If conversion is not possible a negative errno value returned. | |
1120 | * | |
1121 | * Depending on the @low_bits flag the function prefers low or high OCR bits | |
1122 | * on boundary voltages. For example, | |
1123 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); | |
1124 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); | |
1125 | * | |
1126 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). | |
1127 | */ | |
1128 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) | |
1129 | { | |
1130 | const int max_bit = ilog2(MMC_VDD_35_36); | |
1131 | int bit; | |
1132 | ||
1133 | if (vdd < 1650 || vdd > 3600) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | if (vdd >= 1650 && vdd <= 1950) | |
1137 | return ilog2(MMC_VDD_165_195); | |
1138 | ||
1139 | if (low_bits) | |
1140 | vdd -= 1; | |
1141 | ||
1142 | /* Base 2000 mV, step 100 mV, bit's base 8. */ | |
1143 | bit = (vdd - 2000) / 100 + 8; | |
1144 | if (bit > max_bit) | |
1145 | return max_bit; | |
1146 | return bit; | |
1147 | } | |
1148 | ||
1149 | /** | |
1150 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask | |
1151 | * @vdd_min: minimum voltage value (mV) | |
1152 | * @vdd_max: maximum voltage value (mV) | |
1153 | * | |
1154 | * This function returns the OCR mask bits according to the provided @vdd_min | |
1155 | * and @vdd_max values. If conversion is not possible the function returns 0. | |
1156 | * | |
1157 | * Notes wrt boundary cases: | |
1158 | * This function sets the OCR bits for all boundary voltages, for example | |
1159 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | | |
1160 | * MMC_VDD_34_35 mask. | |
1161 | */ | |
1162 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) | |
1163 | { | |
1164 | u32 mask = 0; | |
1165 | ||
1166 | if (vdd_max < vdd_min) | |
1167 | return 0; | |
1168 | ||
1169 | /* Prefer high bits for the boundary vdd_max values. */ | |
1170 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); | |
1171 | if (vdd_max < 0) | |
1172 | return 0; | |
1173 | ||
1174 | /* Prefer low bits for the boundary vdd_min values. */ | |
1175 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); | |
1176 | if (vdd_min < 0) | |
1177 | return 0; | |
1178 | ||
1179 | /* Fill the mask, from max bit to min bit. */ | |
1180 | while (vdd_max >= vdd_min) | |
1181 | mask |= 1 << vdd_max--; | |
1182 | ||
1183 | return mask; | |
1184 | } | |
1185 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); | |
1186 | ||
6e9e318b HZ |
1187 | #ifdef CONFIG_OF |
1188 | ||
1189 | /** | |
1190 | * mmc_of_parse_voltage - return mask of supported voltages | |
1191 | * @np: The device node need to be parsed. | |
1192 | * @mask: mask of voltages available for MMC/SD/SDIO | |
1193 | * | |
1194 | * 1. Return zero on success. | |
1195 | * 2. Return negative errno: voltage-range is invalid. | |
1196 | */ | |
1197 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) | |
1198 | { | |
1199 | const u32 *voltage_ranges; | |
1200 | int num_ranges, i; | |
1201 | ||
1202 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); | |
1203 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; | |
1204 | if (!voltage_ranges || !num_ranges) { | |
1205 | pr_info("%s: voltage-ranges unspecified\n", np->full_name); | |
1206 | return -EINVAL; | |
1207 | } | |
1208 | ||
1209 | for (i = 0; i < num_ranges; i++) { | |
1210 | const int j = i * 2; | |
1211 | u32 ocr_mask; | |
1212 | ||
1213 | ocr_mask = mmc_vddrange_to_ocrmask( | |
1214 | be32_to_cpu(voltage_ranges[j]), | |
1215 | be32_to_cpu(voltage_ranges[j + 1])); | |
1216 | if (!ocr_mask) { | |
1217 | pr_err("%s: voltage-range #%d is invalid\n", | |
1218 | np->full_name, i); | |
1219 | return -EINVAL; | |
1220 | } | |
1221 | *mask |= ocr_mask; | |
1222 | } | |
1223 | ||
1224 | return 0; | |
1225 | } | |
1226 | EXPORT_SYMBOL(mmc_of_parse_voltage); | |
1227 | ||
1228 | #endif /* CONFIG_OF */ | |
1229 | ||
5c13941a DB |
1230 | #ifdef CONFIG_REGULATOR |
1231 | ||
1232 | /** | |
1233 | * mmc_regulator_get_ocrmask - return mask of supported voltages | |
1234 | * @supply: regulator to use | |
1235 | * | |
1236 | * This returns either a negative errno, or a mask of voltages that | |
1237 | * can be provided to MMC/SD/SDIO devices using the specified voltage | |
1238 | * regulator. This would normally be called before registering the | |
1239 | * MMC host adapter. | |
1240 | */ | |
1241 | int mmc_regulator_get_ocrmask(struct regulator *supply) | |
1242 | { | |
1243 | int result = 0; | |
1244 | int count; | |
1245 | int i; | |
9ed7ca89 JMC |
1246 | int vdd_uV; |
1247 | int vdd_mV; | |
5c13941a DB |
1248 | |
1249 | count = regulator_count_voltages(supply); | |
1250 | if (count < 0) | |
1251 | return count; | |
1252 | ||
1253 | for (i = 0; i < count; i++) { | |
5c13941a DB |
1254 | vdd_uV = regulator_list_voltage(supply, i); |
1255 | if (vdd_uV <= 0) | |
1256 | continue; | |
1257 | ||
1258 | vdd_mV = vdd_uV / 1000; | |
1259 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1260 | } | |
1261 | ||
9ed7ca89 JMC |
1262 | if (!result) { |
1263 | vdd_uV = regulator_get_voltage(supply); | |
1264 | if (vdd_uV <= 0) | |
1265 | return vdd_uV; | |
1266 | ||
1267 | vdd_mV = vdd_uV / 1000; | |
1268 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); | |
1269 | } | |
1270 | ||
5c13941a DB |
1271 | return result; |
1272 | } | |
45a6b32e | 1273 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
5c13941a DB |
1274 | |
1275 | /** | |
1276 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage | |
99fc5131 | 1277 | * @mmc: the host to regulate |
5c13941a | 1278 | * @supply: regulator to use |
99fc5131 | 1279 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
5c13941a DB |
1280 | * |
1281 | * Returns zero on success, else negative errno. | |
1282 | * | |
1283 | * MMC host drivers may use this to enable or disable a regulator using | |
1284 | * a particular supply voltage. This would normally be called from the | |
1285 | * set_ios() method. | |
1286 | */ | |
99fc5131 LW |
1287 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
1288 | struct regulator *supply, | |
1289 | unsigned short vdd_bit) | |
5c13941a DB |
1290 | { |
1291 | int result = 0; | |
1292 | int min_uV, max_uV; | |
5c13941a DB |
1293 | |
1294 | if (vdd_bit) { | |
1295 | int tmp; | |
5c13941a | 1296 | |
9cde5b7a CB |
1297 | /* |
1298 | * REVISIT mmc_vddrange_to_ocrmask() may have set some | |
5c13941a DB |
1299 | * bits this regulator doesn't quite support ... don't |
1300 | * be too picky, most cards and regulators are OK with | |
1301 | * a 0.1V range goof (it's a small error percentage). | |
1302 | */ | |
1303 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); | |
1304 | if (tmp == 0) { | |
1305 | min_uV = 1650 * 1000; | |
1306 | max_uV = 1950 * 1000; | |
1307 | } else { | |
1308 | min_uV = 1900 * 1000 + tmp * 100 * 1000; | |
1309 | max_uV = min_uV + 100 * 1000; | |
1310 | } | |
1311 | ||
ca6429d4 | 1312 | result = regulator_set_voltage(supply, min_uV, max_uV); |
99fc5131 | 1313 | if (result == 0 && !mmc->regulator_enabled) { |
5c13941a | 1314 | result = regulator_enable(supply); |
99fc5131 LW |
1315 | if (!result) |
1316 | mmc->regulator_enabled = true; | |
1317 | } | |
1318 | } else if (mmc->regulator_enabled) { | |
5c13941a | 1319 | result = regulator_disable(supply); |
99fc5131 LW |
1320 | if (result == 0) |
1321 | mmc->regulator_enabled = false; | |
5c13941a DB |
1322 | } |
1323 | ||
99fc5131 LW |
1324 | if (result) |
1325 | dev_err(mmc_dev(mmc), | |
1326 | "could not set regulator OCR (%d)\n", result); | |
5c13941a DB |
1327 | return result; |
1328 | } | |
45a6b32e | 1329 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
5c13941a | 1330 | |
4d1f52f9 TK |
1331 | #endif /* CONFIG_REGULATOR */ |
1332 | ||
e137788d GL |
1333 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
1334 | { | |
1335 | struct device *dev = mmc_dev(mmc); | |
e137788d GL |
1336 | int ret; |
1337 | ||
4d1f52f9 | 1338 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
bc35d5ed | 1339 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
e137788d | 1340 | |
4d1f52f9 TK |
1341 | if (IS_ERR(mmc->supply.vmmc)) { |
1342 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) | |
1343 | return -EPROBE_DEFER; | |
1344 | dev_info(dev, "No vmmc regulator found\n"); | |
1345 | } else { | |
1346 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); | |
1347 | if (ret > 0) | |
1348 | mmc->ocr_avail = ret; | |
1349 | else | |
1350 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); | |
1351 | } | |
e137788d | 1352 | |
4d1f52f9 TK |
1353 | if (IS_ERR(mmc->supply.vqmmc)) { |
1354 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) | |
1355 | return -EPROBE_DEFER; | |
1356 | dev_info(dev, "No vqmmc regulator found\n"); | |
1357 | } | |
e137788d GL |
1358 | |
1359 | return 0; | |
1360 | } | |
1361 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); | |
1362 | ||
1da177e4 LT |
1363 | /* |
1364 | * Mask off any voltages we don't support and select | |
1365 | * the lowest voltage | |
1366 | */ | |
7ea239d9 | 1367 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
1da177e4 LT |
1368 | { |
1369 | int bit; | |
1370 | ||
726d6f23 UH |
1371 | /* |
1372 | * Sanity check the voltages that the card claims to | |
1373 | * support. | |
1374 | */ | |
1375 | if (ocr & 0x7F) { | |
1376 | dev_warn(mmc_dev(host), | |
1377 | "card claims to support voltages below defined range\n"); | |
1378 | ocr &= ~0x7F; | |
1379 | } | |
1380 | ||
1da177e4 | 1381 | ocr &= host->ocr_avail; |
ce69d37b UH |
1382 | if (!ocr) { |
1383 | dev_warn(mmc_dev(host), "no support for card's volts\n"); | |
1384 | return 0; | |
1385 | } | |
1da177e4 | 1386 | |
ce69d37b UH |
1387 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
1388 | bit = ffs(ocr) - 1; | |
63ef731a | 1389 | ocr &= 3 << bit; |
ce69d37b | 1390 | mmc_power_cycle(host, ocr); |
1da177e4 | 1391 | } else { |
ce69d37b UH |
1392 | bit = fls(ocr) - 1; |
1393 | ocr &= 3 << bit; | |
1394 | if (bit != host->ios.vdd) | |
1395 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); | |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | return ocr; | |
1399 | } | |
1400 | ||
567c8903 JR |
1401 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
1402 | { | |
1403 | int err = 0; | |
1404 | int old_signal_voltage = host->ios.signal_voltage; | |
1405 | ||
1406 | host->ios.signal_voltage = signal_voltage; | |
1407 | if (host->ops->start_signal_voltage_switch) { | |
1408 | mmc_host_clk_hold(host); | |
1409 | err = host->ops->start_signal_voltage_switch(host, &host->ios); | |
1410 | mmc_host_clk_release(host); | |
1411 | } | |
1412 | ||
1413 | if (err) | |
1414 | host->ios.signal_voltage = old_signal_voltage; | |
1415 | ||
1416 | return err; | |
1417 | ||
1418 | } | |
1419 | ||
0f791fda | 1420 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr) |
f2119df6 AN |
1421 | { |
1422 | struct mmc_command cmd = {0}; | |
1423 | int err = 0; | |
0797e5f1 | 1424 | u32 clock; |
f2119df6 AN |
1425 | |
1426 | BUG_ON(!host); | |
1427 | ||
1428 | /* | |
1429 | * Send CMD11 only if the request is to switch the card to | |
1430 | * 1.8V signalling. | |
1431 | */ | |
0797e5f1 JR |
1432 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
1433 | return __mmc_set_signal_voltage(host, signal_voltage); | |
f2119df6 | 1434 | |
0797e5f1 JR |
1435 | /* |
1436 | * If we cannot switch voltages, return failure so the caller | |
1437 | * can continue without UHS mode | |
1438 | */ | |
1439 | if (!host->ops->start_signal_voltage_switch) | |
1440 | return -EPERM; | |
1441 | if (!host->ops->card_busy) | |
6606110d JP |
1442 | pr_warn("%s: cannot verify signal voltage switch\n", |
1443 | mmc_hostname(host)); | |
0797e5f1 JR |
1444 | |
1445 | cmd.opcode = SD_SWITCH_VOLTAGE; | |
1446 | cmd.arg = 0; | |
1447 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1448 | ||
1449 | err = mmc_wait_for_cmd(host, &cmd, 0); | |
1450 | if (err) | |
1451 | return err; | |
1452 | ||
1453 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) | |
1454 | return -EIO; | |
1455 | ||
1456 | mmc_host_clk_hold(host); | |
1457 | /* | |
1458 | * The card should drive cmd and dat[0:3] low immediately | |
1459 | * after the response of cmd11, but wait 1 ms to be sure | |
1460 | */ | |
1461 | mmc_delay(1); | |
1462 | if (host->ops->card_busy && !host->ops->card_busy(host)) { | |
1463 | err = -EAGAIN; | |
1464 | goto power_cycle; | |
1465 | } | |
1466 | /* | |
1467 | * During a signal voltage level switch, the clock must be gated | |
1468 | * for 5 ms according to the SD spec | |
1469 | */ | |
1470 | clock = host->ios.clock; | |
1471 | host->ios.clock = 0; | |
1472 | mmc_set_ios(host); | |
f2119df6 | 1473 | |
0797e5f1 JR |
1474 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
1475 | /* | |
1476 | * Voltages may not have been switched, but we've already | |
1477 | * sent CMD11, so a power cycle is required anyway | |
1478 | */ | |
1479 | err = -EAGAIN; | |
1480 | goto power_cycle; | |
f2119df6 AN |
1481 | } |
1482 | ||
0797e5f1 JR |
1483 | /* Keep clock gated for at least 5 ms */ |
1484 | mmc_delay(5); | |
1485 | host->ios.clock = clock; | |
1486 | mmc_set_ios(host); | |
1487 | ||
1488 | /* Wait for at least 1 ms according to spec */ | |
1489 | mmc_delay(1); | |
1490 | ||
1491 | /* | |
1492 | * Failure to switch is indicated by the card holding | |
1493 | * dat[0:3] low | |
1494 | */ | |
1495 | if (host->ops->card_busy && host->ops->card_busy(host)) | |
1496 | err = -EAGAIN; | |
1497 | ||
1498 | power_cycle: | |
1499 | if (err) { | |
1500 | pr_debug("%s: Signal voltage switch failed, " | |
1501 | "power cycling card\n", mmc_hostname(host)); | |
0f791fda | 1502 | mmc_power_cycle(host, ocr); |
0797e5f1 JR |
1503 | } |
1504 | ||
1505 | mmc_host_clk_release(host); | |
1506 | ||
1507 | return err; | |
f2119df6 AN |
1508 | } |
1509 | ||
b57c43ad | 1510 | /* |
7ea239d9 | 1511 | * Select timing parameters for host. |
b57c43ad | 1512 | */ |
7ea239d9 | 1513 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
b57c43ad | 1514 | { |
778e277c | 1515 | mmc_host_clk_hold(host); |
7ea239d9 PO |
1516 | host->ios.timing = timing; |
1517 | mmc_set_ios(host); | |
778e277c | 1518 | mmc_host_clk_release(host); |
b57c43ad PO |
1519 | } |
1520 | ||
d6d50a15 AN |
1521 | /* |
1522 | * Select appropriate driver type for host. | |
1523 | */ | |
1524 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) | |
1525 | { | |
778e277c | 1526 | mmc_host_clk_hold(host); |
d6d50a15 AN |
1527 | host->ios.drv_type = drv_type; |
1528 | mmc_set_ios(host); | |
778e277c | 1529 | mmc_host_clk_release(host); |
d6d50a15 AN |
1530 | } |
1531 | ||
1da177e4 | 1532 | /* |
45f8245b RK |
1533 | * Apply power to the MMC stack. This is a two-stage process. |
1534 | * First, we enable power to the card without the clock running. | |
1535 | * We then wait a bit for the power to stabilise. Finally, | |
1536 | * enable the bus drivers and clock to the card. | |
1537 | * | |
1538 | * We must _NOT_ enable the clock prior to power stablising. | |
1539 | * | |
1540 | * If a host does all the power sequencing itself, ignore the | |
1541 | * initial MMC_POWER_UP stage. | |
1da177e4 | 1542 | */ |
4a065193 | 1543 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
1da177e4 | 1544 | { |
fa550189 UH |
1545 | if (host->ios.power_mode == MMC_POWER_ON) |
1546 | return; | |
1547 | ||
778e277c MW |
1548 | mmc_host_clk_hold(host); |
1549 | ||
4a065193 | 1550 | host->ios.vdd = fls(ocr) - 1; |
44669034 | 1551 | if (mmc_host_is_spi(host)) |
af517150 | 1552 | host->ios.chip_select = MMC_CS_HIGH; |
44669034 | 1553 | else |
af517150 | 1554 | host->ios.chip_select = MMC_CS_DONTCARE; |
44669034 | 1555 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; |
1da177e4 | 1556 | host->ios.power_mode = MMC_POWER_UP; |
f218278a | 1557 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
cd9277c0 | 1558 | host->ios.timing = MMC_TIMING_LEGACY; |
920e70c5 | 1559 | mmc_set_ios(host); |
1da177e4 | 1560 | |
ceae98f2 TK |
1561 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
1562 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) | |
1563 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); | |
1564 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) | |
1565 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); | |
1566 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) | |
1567 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); | |
108ecc4c | 1568 | |
f9996aee PO |
1569 | /* |
1570 | * This delay should be sufficient to allow the power supply | |
1571 | * to reach the minimum voltage. | |
1572 | */ | |
79bccc5a | 1573 | mmc_delay(10); |
1da177e4 | 1574 | |
88ae8b86 | 1575 | host->ios.clock = host->f_init; |
8dfd0374 | 1576 | |
1da177e4 | 1577 | host->ios.power_mode = MMC_POWER_ON; |
920e70c5 | 1578 | mmc_set_ios(host); |
1da177e4 | 1579 | |
f9996aee PO |
1580 | /* |
1581 | * This delay must be at least 74 clock sizes, or 1 ms, or the | |
1582 | * time required to reach a stable voltage. | |
1583 | */ | |
79bccc5a | 1584 | mmc_delay(10); |
778e277c MW |
1585 | |
1586 | mmc_host_clk_release(host); | |
1da177e4 LT |
1587 | } |
1588 | ||
7f7e4129 | 1589 | void mmc_power_off(struct mmc_host *host) |
1da177e4 | 1590 | { |
fa550189 UH |
1591 | if (host->ios.power_mode == MMC_POWER_OFF) |
1592 | return; | |
1593 | ||
778e277c MW |
1594 | mmc_host_clk_hold(host); |
1595 | ||
1da177e4 LT |
1596 | host->ios.clock = 0; |
1597 | host->ios.vdd = 0; | |
b33d46c3 | 1598 | |
af517150 DB |
1599 | if (!mmc_host_is_spi(host)) { |
1600 | host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; | |
1601 | host->ios.chip_select = MMC_CS_DONTCARE; | |
1602 | } | |
1da177e4 | 1603 | host->ios.power_mode = MMC_POWER_OFF; |
f218278a | 1604 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
cd9277c0 | 1605 | host->ios.timing = MMC_TIMING_LEGACY; |
920e70c5 | 1606 | mmc_set_ios(host); |
778e277c | 1607 | |
041beb1d DD |
1608 | /* |
1609 | * Some configurations, such as the 802.11 SDIO card in the OLPC | |
1610 | * XO-1.5, require a short delay after poweroff before the card | |
1611 | * can be successfully turned on again. | |
1612 | */ | |
1613 | mmc_delay(1); | |
1614 | ||
778e277c | 1615 | mmc_host_clk_release(host); |
1da177e4 LT |
1616 | } |
1617 | ||
4a065193 | 1618 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
276e090f JR |
1619 | { |
1620 | mmc_power_off(host); | |
1621 | /* Wait at least 1 ms according to SD spec */ | |
1622 | mmc_delay(1); | |
4a065193 | 1623 | mmc_power_up(host, ocr); |
276e090f JR |
1624 | } |
1625 | ||
39361851 AB |
1626 | /* |
1627 | * Cleanup when the last reference to the bus operator is dropped. | |
1628 | */ | |
261172fd | 1629 | static void __mmc_release_bus(struct mmc_host *host) |
39361851 AB |
1630 | { |
1631 | BUG_ON(!host); | |
1632 | BUG_ON(host->bus_refs); | |
1633 | BUG_ON(!host->bus_dead); | |
1634 | ||
1635 | host->bus_ops = NULL; | |
1636 | } | |
1637 | ||
1638 | /* | |
1639 | * Increase reference count of bus operator | |
1640 | */ | |
1641 | static inline void mmc_bus_get(struct mmc_host *host) | |
1642 | { | |
1643 | unsigned long flags; | |
1644 | ||
1645 | spin_lock_irqsave(&host->lock, flags); | |
1646 | host->bus_refs++; | |
1647 | spin_unlock_irqrestore(&host->lock, flags); | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * Decrease reference count of bus operator and free it if | |
1652 | * it is the last reference. | |
1653 | */ | |
1654 | static inline void mmc_bus_put(struct mmc_host *host) | |
1655 | { | |
1656 | unsigned long flags; | |
1657 | ||
1658 | spin_lock_irqsave(&host->lock, flags); | |
1659 | host->bus_refs--; | |
1660 | if ((host->bus_refs == 0) && host->bus_ops) | |
1661 | __mmc_release_bus(host); | |
1662 | spin_unlock_irqrestore(&host->lock, flags); | |
1663 | } | |
1664 | ||
1da177e4 | 1665 | /* |
7ea239d9 PO |
1666 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
1667 | * host at any given time. | |
1da177e4 | 1668 | */ |
7ea239d9 | 1669 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
1da177e4 | 1670 | { |
7ea239d9 | 1671 | unsigned long flags; |
e45a1bd2 | 1672 | |
7ea239d9 PO |
1673 | BUG_ON(!host); |
1674 | BUG_ON(!ops); | |
b855885e | 1675 | |
d84075c8 | 1676 | WARN_ON(!host->claimed); |
bce40a36 | 1677 | |
7ea239d9 | 1678 | spin_lock_irqsave(&host->lock, flags); |
bce40a36 | 1679 | |
7ea239d9 PO |
1680 | BUG_ON(host->bus_ops); |
1681 | BUG_ON(host->bus_refs); | |
b57c43ad | 1682 | |
7ea239d9 PO |
1683 | host->bus_ops = ops; |
1684 | host->bus_refs = 1; | |
1685 | host->bus_dead = 0; | |
b57c43ad | 1686 | |
7ea239d9 | 1687 | spin_unlock_irqrestore(&host->lock, flags); |
b57c43ad PO |
1688 | } |
1689 | ||
7ea239d9 | 1690 | /* |
7f7e4129 | 1691 | * Remove the current bus handler from a host. |
7ea239d9 PO |
1692 | */ |
1693 | void mmc_detach_bus(struct mmc_host *host) | |
7ccd266e | 1694 | { |
7ea239d9 | 1695 | unsigned long flags; |
7ccd266e | 1696 | |
7ea239d9 | 1697 | BUG_ON(!host); |
7ccd266e | 1698 | |
d84075c8 PO |
1699 | WARN_ON(!host->claimed); |
1700 | WARN_ON(!host->bus_ops); | |
cd9277c0 | 1701 | |
7ea239d9 | 1702 | spin_lock_irqsave(&host->lock, flags); |
7ccd266e | 1703 | |
7ea239d9 | 1704 | host->bus_dead = 1; |
7ccd266e | 1705 | |
7ea239d9 | 1706 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 | 1707 | |
7ea239d9 | 1708 | mmc_bus_put(host); |
1da177e4 LT |
1709 | } |
1710 | ||
bbd43682 UH |
1711 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
1712 | bool cd_irq) | |
1713 | { | |
1714 | #ifdef CONFIG_MMC_DEBUG | |
1715 | unsigned long flags; | |
1716 | spin_lock_irqsave(&host->lock, flags); | |
1717 | WARN_ON(host->removed); | |
1718 | spin_unlock_irqrestore(&host->lock, flags); | |
1719 | #endif | |
1720 | ||
1721 | /* | |
1722 | * If the device is configured as wakeup, we prevent a new sleep for | |
1723 | * 5 s to give provision for user space to consume the event. | |
1724 | */ | |
1725 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && | |
1726 | device_can_wakeup(mmc_dev(host))) | |
1727 | pm_wakeup_event(mmc_dev(host), 5000); | |
1728 | ||
1729 | host->detect_change = 1; | |
1730 | mmc_schedule_delayed_work(&host->detect, delay); | |
1731 | } | |
1732 | ||
1da177e4 LT |
1733 | /** |
1734 | * mmc_detect_change - process change of state on a MMC socket | |
1735 | * @host: host which changed state. | |
8dc00335 | 1736 | * @delay: optional delay to wait before detection (jiffies) |
1da177e4 | 1737 | * |
67a61c48 PO |
1738 | * MMC drivers should call this when they detect a card has been |
1739 | * inserted or removed. The MMC layer will confirm that any | |
1740 | * present card is still functional, and initialize any newly | |
1741 | * inserted. | |
1da177e4 | 1742 | */ |
8dc00335 | 1743 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
1da177e4 | 1744 | { |
bbd43682 | 1745 | _mmc_detect_change(host, delay, true); |
1da177e4 | 1746 | } |
1da177e4 LT |
1747 | EXPORT_SYMBOL(mmc_detect_change); |
1748 | ||
dfe86cba AH |
1749 | void mmc_init_erase(struct mmc_card *card) |
1750 | { | |
1751 | unsigned int sz; | |
1752 | ||
1753 | if (is_power_of_2(card->erase_size)) | |
1754 | card->erase_shift = ffs(card->erase_size) - 1; | |
1755 | else | |
1756 | card->erase_shift = 0; | |
1757 | ||
1758 | /* | |
1759 | * It is possible to erase an arbitrarily large area of an SD or MMC | |
1760 | * card. That is not desirable because it can take a long time | |
1761 | * (minutes) potentially delaying more important I/O, and also the | |
1762 | * timeout calculations become increasingly hugely over-estimated. | |
1763 | * Consequently, 'pref_erase' is defined as a guide to limit erases | |
1764 | * to that size and alignment. | |
1765 | * | |
1766 | * For SD cards that define Allocation Unit size, limit erases to one | |
1767 | * Allocation Unit at a time. For MMC cards that define High Capacity | |
1768 | * Erase Size, whether it is switched on or not, limit to that size. | |
1769 | * Otherwise just have a stab at a good value. For modern cards it | |
1770 | * will end up being 4MiB. Note that if the value is too small, it | |
1771 | * can end up taking longer to erase. | |
1772 | */ | |
1773 | if (mmc_card_sd(card) && card->ssr.au) { | |
1774 | card->pref_erase = card->ssr.au; | |
1775 | card->erase_shift = ffs(card->ssr.au) - 1; | |
1776 | } else if (card->ext_csd.hc_erase_size) { | |
1777 | card->pref_erase = card->ext_csd.hc_erase_size; | |
cc8aa7de | 1778 | } else if (card->erase_size) { |
dfe86cba AH |
1779 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
1780 | if (sz < 128) | |
1781 | card->pref_erase = 512 * 1024 / 512; | |
1782 | else if (sz < 512) | |
1783 | card->pref_erase = 1024 * 1024 / 512; | |
1784 | else if (sz < 1024) | |
1785 | card->pref_erase = 2 * 1024 * 1024 / 512; | |
1786 | else | |
1787 | card->pref_erase = 4 * 1024 * 1024 / 512; | |
1788 | if (card->pref_erase < card->erase_size) | |
1789 | card->pref_erase = card->erase_size; | |
1790 | else { | |
1791 | sz = card->pref_erase % card->erase_size; | |
1792 | if (sz) | |
1793 | card->pref_erase += card->erase_size - sz; | |
1794 | } | |
cc8aa7de CD |
1795 | } else |
1796 | card->pref_erase = 0; | |
dfe86cba AH |
1797 | } |
1798 | ||
eaa02f75 AW |
1799 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
1800 | unsigned int arg, unsigned int qty) | |
dfe86cba AH |
1801 | { |
1802 | unsigned int erase_timeout; | |
1803 | ||
7194efb8 AH |
1804 | if (arg == MMC_DISCARD_ARG || |
1805 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { | |
1806 | erase_timeout = card->ext_csd.trim_timeout; | |
1807 | } else if (card->ext_csd.erase_group_def & 1) { | |
dfe86cba AH |
1808 | /* High Capacity Erase Group Size uses HC timeouts */ |
1809 | if (arg == MMC_TRIM_ARG) | |
1810 | erase_timeout = card->ext_csd.trim_timeout; | |
1811 | else | |
1812 | erase_timeout = card->ext_csd.hc_erase_timeout; | |
1813 | } else { | |
1814 | /* CSD Erase Group Size uses write timeout */ | |
1815 | unsigned int mult = (10 << card->csd.r2w_factor); | |
1816 | unsigned int timeout_clks = card->csd.tacc_clks * mult; | |
1817 | unsigned int timeout_us; | |
1818 | ||
1819 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ | |
1820 | if (card->csd.tacc_ns < 1000000) | |
1821 | timeout_us = (card->csd.tacc_ns * mult) / 1000; | |
1822 | else | |
1823 | timeout_us = (card->csd.tacc_ns / 1000) * mult; | |
1824 | ||
1825 | /* | |
1826 | * ios.clock is only a target. The real clock rate might be | |
1827 | * less but not that much less, so fudge it by multiplying by 2. | |
1828 | */ | |
1829 | timeout_clks <<= 1; | |
1830 | timeout_us += (timeout_clks * 1000) / | |
4cf8c6dd | 1831 | (mmc_host_clk_rate(card->host) / 1000); |
dfe86cba AH |
1832 | |
1833 | erase_timeout = timeout_us / 1000; | |
1834 | ||
1835 | /* | |
1836 | * Theoretically, the calculation could underflow so round up | |
1837 | * to 1ms in that case. | |
1838 | */ | |
1839 | if (!erase_timeout) | |
1840 | erase_timeout = 1; | |
1841 | } | |
1842 | ||
1843 | /* Multiplier for secure operations */ | |
1844 | if (arg & MMC_SECURE_ARGS) { | |
1845 | if (arg == MMC_SECURE_ERASE_ARG) | |
1846 | erase_timeout *= card->ext_csd.sec_erase_mult; | |
1847 | else | |
1848 | erase_timeout *= card->ext_csd.sec_trim_mult; | |
1849 | } | |
1850 | ||
1851 | erase_timeout *= qty; | |
1852 | ||
1853 | /* | |
1854 | * Ensure at least a 1 second timeout for SPI as per | |
1855 | * 'mmc_set_data_timeout()' | |
1856 | */ | |
1857 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) | |
1858 | erase_timeout = 1000; | |
1859 | ||
eaa02f75 | 1860 | return erase_timeout; |
dfe86cba AH |
1861 | } |
1862 | ||
eaa02f75 AW |
1863 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
1864 | unsigned int arg, | |
1865 | unsigned int qty) | |
dfe86cba | 1866 | { |
eaa02f75 AW |
1867 | unsigned int erase_timeout; |
1868 | ||
dfe86cba AH |
1869 | if (card->ssr.erase_timeout) { |
1870 | /* Erase timeout specified in SD Status Register (SSR) */ | |
eaa02f75 AW |
1871 | erase_timeout = card->ssr.erase_timeout * qty + |
1872 | card->ssr.erase_offset; | |
dfe86cba AH |
1873 | } else { |
1874 | /* | |
1875 | * Erase timeout not specified in SD Status Register (SSR) so | |
1876 | * use 250ms per write block. | |
1877 | */ | |
eaa02f75 | 1878 | erase_timeout = 250 * qty; |
dfe86cba AH |
1879 | } |
1880 | ||
1881 | /* Must not be less than 1 second */ | |
eaa02f75 AW |
1882 | if (erase_timeout < 1000) |
1883 | erase_timeout = 1000; | |
1884 | ||
1885 | return erase_timeout; | |
dfe86cba AH |
1886 | } |
1887 | ||
eaa02f75 AW |
1888 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
1889 | unsigned int arg, | |
1890 | unsigned int qty) | |
dfe86cba AH |
1891 | { |
1892 | if (mmc_card_sd(card)) | |
eaa02f75 | 1893 | return mmc_sd_erase_timeout(card, arg, qty); |
dfe86cba | 1894 | else |
eaa02f75 | 1895 | return mmc_mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1896 | } |
1897 | ||
1898 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, | |
1899 | unsigned int to, unsigned int arg) | |
1900 | { | |
1278dba1 | 1901 | struct mmc_command cmd = {0}; |
dfe86cba | 1902 | unsigned int qty = 0; |
8fee476b | 1903 | unsigned long timeout; |
dfe86cba AH |
1904 | int err; |
1905 | ||
1906 | /* | |
1907 | * qty is used to calculate the erase timeout which depends on how many | |
1908 | * erase groups (or allocation units in SD terminology) are affected. | |
1909 | * We count erasing part of an erase group as one erase group. | |
1910 | * For SD, the allocation units are always a power of 2. For MMC, the | |
1911 | * erase group size is almost certainly also power of 2, but it does not | |
1912 | * seem to insist on that in the JEDEC standard, so we fall back to | |
1913 | * division in that case. SD may not specify an allocation unit size, | |
1914 | * in which case the timeout is based on the number of write blocks. | |
1915 | * | |
1916 | * Note that the timeout for secure trim 2 will only be correct if the | |
1917 | * number of erase groups specified is the same as the total of all | |
1918 | * preceding secure trim 1 commands. Since the power may have been | |
1919 | * lost since the secure trim 1 commands occurred, it is generally | |
1920 | * impossible to calculate the secure trim 2 timeout correctly. | |
1921 | */ | |
1922 | if (card->erase_shift) | |
1923 | qty += ((to >> card->erase_shift) - | |
1924 | (from >> card->erase_shift)) + 1; | |
1925 | else if (mmc_card_sd(card)) | |
1926 | qty += to - from + 1; | |
1927 | else | |
1928 | qty += ((to / card->erase_size) - | |
1929 | (from / card->erase_size)) + 1; | |
1930 | ||
1931 | if (!mmc_card_blockaddr(card)) { | |
1932 | from <<= 9; | |
1933 | to <<= 9; | |
1934 | } | |
1935 | ||
dfe86cba AH |
1936 | if (mmc_card_sd(card)) |
1937 | cmd.opcode = SD_ERASE_WR_BLK_START; | |
1938 | else | |
1939 | cmd.opcode = MMC_ERASE_GROUP_START; | |
1940 | cmd.arg = from; | |
1941 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1942 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1943 | if (err) { | |
a3c76eb9 | 1944 | pr_err("mmc_erase: group start error %d, " |
dfe86cba | 1945 | "status %#x\n", err, cmd.resp[0]); |
67716327 | 1946 | err = -EIO; |
dfe86cba AH |
1947 | goto out; |
1948 | } | |
1949 | ||
1950 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1951 | if (mmc_card_sd(card)) | |
1952 | cmd.opcode = SD_ERASE_WR_BLK_END; | |
1953 | else | |
1954 | cmd.opcode = MMC_ERASE_GROUP_END; | |
1955 | cmd.arg = to; | |
1956 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
1957 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1958 | if (err) { | |
a3c76eb9 | 1959 | pr_err("mmc_erase: group end error %d, status %#x\n", |
dfe86cba | 1960 | err, cmd.resp[0]); |
67716327 | 1961 | err = -EIO; |
dfe86cba AH |
1962 | goto out; |
1963 | } | |
1964 | ||
1965 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1966 | cmd.opcode = MMC_ERASE; | |
1967 | cmd.arg = arg; | |
1968 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1d4d7744 | 1969 | cmd.busy_timeout = mmc_erase_timeout(card, arg, qty); |
dfe86cba AH |
1970 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
1971 | if (err) { | |
a3c76eb9 | 1972 | pr_err("mmc_erase: erase error %d, status %#x\n", |
dfe86cba AH |
1973 | err, cmd.resp[0]); |
1974 | err = -EIO; | |
1975 | goto out; | |
1976 | } | |
1977 | ||
1978 | if (mmc_host_is_spi(card->host)) | |
1979 | goto out; | |
1980 | ||
8fee476b | 1981 | timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); |
dfe86cba AH |
1982 | do { |
1983 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
1984 | cmd.opcode = MMC_SEND_STATUS; | |
1985 | cmd.arg = card->rca << 16; | |
1986 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1987 | /* Do not retry else we can't see errors */ | |
1988 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
1989 | if (err || (cmd.resp[0] & 0xFDF92000)) { | |
a3c76eb9 | 1990 | pr_err("error %d requesting status %#x\n", |
dfe86cba AH |
1991 | err, cmd.resp[0]); |
1992 | err = -EIO; | |
1993 | goto out; | |
1994 | } | |
8fee476b TR |
1995 | |
1996 | /* Timeout if the device never becomes ready for data and | |
1997 | * never leaves the program state. | |
1998 | */ | |
1999 | if (time_after(jiffies, timeout)) { | |
2000 | pr_err("%s: Card stuck in programming state! %s\n", | |
2001 | mmc_hostname(card->host), __func__); | |
2002 | err = -EIO; | |
2003 | goto out; | |
2004 | } | |
2005 | ||
dfe86cba | 2006 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
8fee476b | 2007 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
dfe86cba AH |
2008 | out: |
2009 | return err; | |
2010 | } | |
2011 | ||
2012 | /** | |
2013 | * mmc_erase - erase sectors. | |
2014 | * @card: card to erase | |
2015 | * @from: first sector to erase | |
2016 | * @nr: number of sectors to erase | |
2017 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) | |
2018 | * | |
2019 | * Caller must claim host before calling this function. | |
2020 | */ | |
2021 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, | |
2022 | unsigned int arg) | |
2023 | { | |
2024 | unsigned int rem, to = from + nr; | |
2025 | ||
2026 | if (!(card->host->caps & MMC_CAP_ERASE) || | |
2027 | !(card->csd.cmdclass & CCC_ERASE)) | |
2028 | return -EOPNOTSUPP; | |
2029 | ||
2030 | if (!card->erase_size) | |
2031 | return -EOPNOTSUPP; | |
2032 | ||
2033 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) | |
2034 | return -EOPNOTSUPP; | |
2035 | ||
2036 | if ((arg & MMC_SECURE_ARGS) && | |
2037 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) | |
2038 | return -EOPNOTSUPP; | |
2039 | ||
2040 | if ((arg & MMC_TRIM_ARGS) && | |
2041 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) | |
2042 | return -EOPNOTSUPP; | |
2043 | ||
2044 | if (arg == MMC_SECURE_ERASE_ARG) { | |
2045 | if (from % card->erase_size || nr % card->erase_size) | |
2046 | return -EINVAL; | |
2047 | } | |
2048 | ||
2049 | if (arg == MMC_ERASE_ARG) { | |
2050 | rem = from % card->erase_size; | |
2051 | if (rem) { | |
2052 | rem = card->erase_size - rem; | |
2053 | from += rem; | |
2054 | if (nr > rem) | |
2055 | nr -= rem; | |
2056 | else | |
2057 | return 0; | |
2058 | } | |
2059 | rem = nr % card->erase_size; | |
2060 | if (rem) | |
2061 | nr -= rem; | |
2062 | } | |
2063 | ||
2064 | if (nr == 0) | |
2065 | return 0; | |
2066 | ||
2067 | to = from + nr; | |
2068 | ||
2069 | if (to <= from) | |
2070 | return -EINVAL; | |
2071 | ||
2072 | /* 'from' and 'to' are inclusive */ | |
2073 | to -= 1; | |
2074 | ||
2075 | return mmc_do_erase(card, from, to, arg); | |
2076 | } | |
2077 | EXPORT_SYMBOL(mmc_erase); | |
2078 | ||
2079 | int mmc_can_erase(struct mmc_card *card) | |
2080 | { | |
2081 | if ((card->host->caps & MMC_CAP_ERASE) && | |
2082 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) | |
2083 | return 1; | |
2084 | return 0; | |
2085 | } | |
2086 | EXPORT_SYMBOL(mmc_can_erase); | |
2087 | ||
2088 | int mmc_can_trim(struct mmc_card *card) | |
2089 | { | |
2090 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) | |
2091 | return 1; | |
2092 | return 0; | |
2093 | } | |
2094 | EXPORT_SYMBOL(mmc_can_trim); | |
2095 | ||
b3bf9153 KP |
2096 | int mmc_can_discard(struct mmc_card *card) |
2097 | { | |
2098 | /* | |
2099 | * As there's no way to detect the discard support bit at v4.5 | |
2100 | * use the s/w feature support filed. | |
2101 | */ | |
2102 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) | |
2103 | return 1; | |
2104 | return 0; | |
2105 | } | |
2106 | EXPORT_SYMBOL(mmc_can_discard); | |
2107 | ||
d9ddd629 KP |
2108 | int mmc_can_sanitize(struct mmc_card *card) |
2109 | { | |
28302812 AH |
2110 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
2111 | return 0; | |
d9ddd629 KP |
2112 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
2113 | return 1; | |
2114 | return 0; | |
2115 | } | |
2116 | EXPORT_SYMBOL(mmc_can_sanitize); | |
2117 | ||
dfe86cba AH |
2118 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
2119 | { | |
5204d00f LC |
2120 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
2121 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) | |
dfe86cba AH |
2122 | return 1; |
2123 | return 0; | |
2124 | } | |
2125 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); | |
2126 | ||
2127 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, | |
2128 | unsigned int nr) | |
2129 | { | |
2130 | if (!card->erase_size) | |
2131 | return 0; | |
2132 | if (from % card->erase_size || nr % card->erase_size) | |
2133 | return 0; | |
2134 | return 1; | |
2135 | } | |
2136 | EXPORT_SYMBOL(mmc_erase_group_aligned); | |
1da177e4 | 2137 | |
e056a1b5 AH |
2138 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
2139 | unsigned int arg) | |
2140 | { | |
2141 | struct mmc_host *host = card->host; | |
2142 | unsigned int max_discard, x, y, qty = 0, max_qty, timeout; | |
2143 | unsigned int last_timeout = 0; | |
2144 | ||
2145 | if (card->erase_shift) | |
2146 | max_qty = UINT_MAX >> card->erase_shift; | |
2147 | else if (mmc_card_sd(card)) | |
2148 | max_qty = UINT_MAX; | |
2149 | else | |
2150 | max_qty = UINT_MAX / card->erase_size; | |
2151 | ||
2152 | /* Find the largest qty with an OK timeout */ | |
2153 | do { | |
2154 | y = 0; | |
2155 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { | |
2156 | timeout = mmc_erase_timeout(card, arg, qty + x); | |
68eb80e0 | 2157 | if (timeout > host->max_busy_timeout) |
e056a1b5 AH |
2158 | break; |
2159 | if (timeout < last_timeout) | |
2160 | break; | |
2161 | last_timeout = timeout; | |
2162 | y = x; | |
2163 | } | |
2164 | qty += y; | |
2165 | } while (y); | |
2166 | ||
2167 | if (!qty) | |
2168 | return 0; | |
2169 | ||
2170 | if (qty == 1) | |
2171 | return 1; | |
2172 | ||
2173 | /* Convert qty to sectors */ | |
2174 | if (card->erase_shift) | |
2175 | max_discard = --qty << card->erase_shift; | |
2176 | else if (mmc_card_sd(card)) | |
2177 | max_discard = qty; | |
2178 | else | |
2179 | max_discard = --qty * card->erase_size; | |
2180 | ||
2181 | return max_discard; | |
2182 | } | |
2183 | ||
2184 | unsigned int mmc_calc_max_discard(struct mmc_card *card) | |
2185 | { | |
2186 | struct mmc_host *host = card->host; | |
2187 | unsigned int max_discard, max_trim; | |
2188 | ||
68eb80e0 | 2189 | if (!host->max_busy_timeout) |
e056a1b5 AH |
2190 | return UINT_MAX; |
2191 | ||
2192 | /* | |
2193 | * Without erase_group_def set, MMC erase timeout depends on clock | |
2194 | * frequence which can change. In that case, the best choice is | |
2195 | * just the preferred erase size. | |
2196 | */ | |
2197 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) | |
2198 | return card->pref_erase; | |
2199 | ||
2200 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); | |
2201 | if (mmc_can_trim(card)) { | |
2202 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); | |
2203 | if (max_trim < max_discard) | |
2204 | max_discard = max_trim; | |
2205 | } else if (max_discard < card->erase_size) { | |
2206 | max_discard = 0; | |
2207 | } | |
2208 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", | |
68eb80e0 | 2209 | mmc_hostname(host), max_discard, host->max_busy_timeout); |
e056a1b5 AH |
2210 | return max_discard; |
2211 | } | |
2212 | EXPORT_SYMBOL(mmc_calc_max_discard); | |
2213 | ||
0f8d8ea6 AH |
2214 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
2215 | { | |
1278dba1 | 2216 | struct mmc_command cmd = {0}; |
0f8d8ea6 | 2217 | |
cdc99179 | 2218 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card)) |
0f8d8ea6 AH |
2219 | return 0; |
2220 | ||
0f8d8ea6 AH |
2221 | cmd.opcode = MMC_SET_BLOCKLEN; |
2222 | cmd.arg = blocklen; | |
2223 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2224 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2225 | } | |
2226 | EXPORT_SYMBOL(mmc_set_blocklen); | |
2227 | ||
67c79db8 LP |
2228 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
2229 | bool is_rel_write) | |
2230 | { | |
2231 | struct mmc_command cmd = {0}; | |
2232 | ||
2233 | cmd.opcode = MMC_SET_BLOCK_COUNT; | |
2234 | cmd.arg = blockcount & 0x0000FFFF; | |
2235 | if (is_rel_write) | |
2236 | cmd.arg |= 1 << 31; | |
2237 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; | |
2238 | return mmc_wait_for_cmd(card->host, &cmd, 5); | |
2239 | } | |
2240 | EXPORT_SYMBOL(mmc_set_blockcount); | |
2241 | ||
b2499518 AH |
2242 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
2243 | { | |
2244 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) | |
2245 | return; | |
2246 | mmc_host_clk_hold(host); | |
2247 | host->ops->hw_reset(host); | |
2248 | mmc_host_clk_release(host); | |
2249 | } | |
2250 | ||
2251 | int mmc_can_reset(struct mmc_card *card) | |
2252 | { | |
2253 | u8 rst_n_function; | |
2254 | ||
2255 | if (!mmc_card_mmc(card)) | |
2256 | return 0; | |
2257 | rst_n_function = card->ext_csd.rst_n_function; | |
2258 | if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) | |
2259 | return 0; | |
2260 | return 1; | |
2261 | } | |
2262 | EXPORT_SYMBOL(mmc_can_reset); | |
2263 | ||
2264 | static int mmc_do_hw_reset(struct mmc_host *host, int check) | |
2265 | { | |
2266 | struct mmc_card *card = host->card; | |
2267 | ||
b2499518 AH |
2268 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
2269 | return -EOPNOTSUPP; | |
2270 | ||
2271 | if (!card) | |
2272 | return -EINVAL; | |
2273 | ||
2274 | if (!mmc_can_reset(card)) | |
2275 | return -EOPNOTSUPP; | |
2276 | ||
2277 | mmc_host_clk_hold(host); | |
2278 | mmc_set_clock(host, host->f_init); | |
2279 | ||
2280 | host->ops->hw_reset(host); | |
2281 | ||
2282 | /* If the reset has happened, then a status command will fail */ | |
2283 | if (check) { | |
2284 | struct mmc_command cmd = {0}; | |
2285 | int err; | |
2286 | ||
2287 | cmd.opcode = MMC_SEND_STATUS; | |
2288 | if (!mmc_host_is_spi(card->host)) | |
2289 | cmd.arg = card->rca << 16; | |
2290 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; | |
2291 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
2292 | if (!err) { | |
2293 | mmc_host_clk_release(host); | |
2294 | return -ENOSYS; | |
2295 | } | |
2296 | } | |
2297 | ||
b2499518 AH |
2298 | if (mmc_host_is_spi(host)) { |
2299 | host->ios.chip_select = MMC_CS_HIGH; | |
2300 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; | |
2301 | } else { | |
2302 | host->ios.chip_select = MMC_CS_DONTCARE; | |
2303 | host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; | |
2304 | } | |
2305 | host->ios.bus_width = MMC_BUS_WIDTH_1; | |
2306 | host->ios.timing = MMC_TIMING_LEGACY; | |
2307 | mmc_set_ios(host); | |
2308 | ||
2309 | mmc_host_clk_release(host); | |
2310 | ||
2311 | return host->bus_ops->power_restore(host); | |
2312 | } | |
2313 | ||
2314 | int mmc_hw_reset(struct mmc_host *host) | |
2315 | { | |
2316 | return mmc_do_hw_reset(host, 0); | |
2317 | } | |
2318 | EXPORT_SYMBOL(mmc_hw_reset); | |
2319 | ||
2320 | int mmc_hw_reset_check(struct mmc_host *host) | |
2321 | { | |
2322 | return mmc_do_hw_reset(host, 1); | |
2323 | } | |
2324 | EXPORT_SYMBOL(mmc_hw_reset_check); | |
2325 | ||
807e8e40 AR |
2326 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
2327 | { | |
2328 | host->f_init = freq; | |
2329 | ||
2330 | #ifdef CONFIG_MMC_DEBUG | |
2331 | pr_info("%s: %s: trying to init card at %u Hz\n", | |
2332 | mmc_hostname(host), __func__, host->f_init); | |
2333 | #endif | |
4a065193 | 2334 | mmc_power_up(host, host->ocr_avail); |
2f94e55a | 2335 | |
b2499518 AH |
2336 | /* |
2337 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so | |
2338 | * do a hardware reset if possible. | |
2339 | */ | |
2340 | mmc_hw_reset_for_init(host); | |
2341 | ||
2f94e55a PR |
2342 | /* |
2343 | * sdio_reset sends CMD52 to reset card. Since we do not know | |
2344 | * if the card is being re-initialized, just send it. CMD52 | |
2345 | * should be ignored by SD/eMMC cards. | |
2346 | */ | |
807e8e40 AR |
2347 | sdio_reset(host); |
2348 | mmc_go_idle(host); | |
2349 | ||
2350 | mmc_send_if_cond(host, host->ocr_avail); | |
2351 | ||
2352 | /* Order's important: probe SDIO, then SD, then MMC */ | |
2353 | if (!mmc_attach_sdio(host)) | |
2354 | return 0; | |
2355 | if (!mmc_attach_sd(host)) | |
2356 | return 0; | |
2357 | if (!mmc_attach_mmc(host)) | |
2358 | return 0; | |
2359 | ||
2360 | mmc_power_off(host); | |
2361 | return -EIO; | |
2362 | } | |
2363 | ||
d3049504 AH |
2364 | int _mmc_detect_card_removed(struct mmc_host *host) |
2365 | { | |
2366 | int ret; | |
2367 | ||
5601aaf7 | 2368 | if (host->caps & MMC_CAP_NONREMOVABLE) |
d3049504 AH |
2369 | return 0; |
2370 | ||
2371 | if (!host->card || mmc_card_removed(host->card)) | |
2372 | return 1; | |
2373 | ||
2374 | ret = host->bus_ops->alive(host); | |
1450734e KL |
2375 | |
2376 | /* | |
2377 | * Card detect status and alive check may be out of sync if card is | |
2378 | * removed slowly, when card detect switch changes while card/slot | |
2379 | * pads are still contacted in hardware (refer to "SD Card Mechanical | |
2380 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a | |
2381 | * detect work 200ms later for this case. | |
2382 | */ | |
2383 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { | |
2384 | mmc_detect_change(host, msecs_to_jiffies(200)); | |
2385 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); | |
2386 | } | |
2387 | ||
d3049504 AH |
2388 | if (ret) { |
2389 | mmc_card_set_removed(host->card); | |
2390 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); | |
2391 | } | |
2392 | ||
2393 | return ret; | |
2394 | } | |
2395 | ||
2396 | int mmc_detect_card_removed(struct mmc_host *host) | |
2397 | { | |
2398 | struct mmc_card *card = host->card; | |
f0cc9cf9 | 2399 | int ret; |
d3049504 AH |
2400 | |
2401 | WARN_ON(!host->claimed); | |
f0cc9cf9 UH |
2402 | |
2403 | if (!card) | |
2404 | return 1; | |
2405 | ||
2406 | ret = mmc_card_removed(card); | |
d3049504 AH |
2407 | /* |
2408 | * The card will be considered unchanged unless we have been asked to | |
2409 | * detect a change or host requires polling to provide card detection. | |
2410 | */ | |
b6891679 | 2411 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
f0cc9cf9 | 2412 | return ret; |
d3049504 AH |
2413 | |
2414 | host->detect_change = 0; | |
f0cc9cf9 UH |
2415 | if (!ret) { |
2416 | ret = _mmc_detect_card_removed(host); | |
b6891679 | 2417 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
f0cc9cf9 UH |
2418 | /* |
2419 | * Schedule a detect work as soon as possible to let a | |
2420 | * rescan handle the card removal. | |
2421 | */ | |
2422 | cancel_delayed_work(&host->detect); | |
bbd43682 | 2423 | _mmc_detect_change(host, 0, false); |
f0cc9cf9 UH |
2424 | } |
2425 | } | |
d3049504 | 2426 | |
f0cc9cf9 | 2427 | return ret; |
d3049504 AH |
2428 | } |
2429 | EXPORT_SYMBOL(mmc_detect_card_removed); | |
2430 | ||
b93931a6 | 2431 | void mmc_rescan(struct work_struct *work) |
1da177e4 | 2432 | { |
c4028958 DH |
2433 | struct mmc_host *host = |
2434 | container_of(work, struct mmc_host, detect.work); | |
88ae8b86 | 2435 | int i; |
4c2ef25f | 2436 | |
fa372a51 MM |
2437 | if (host->trigger_card_event && host->ops->card_event) { |
2438 | host->ops->card_event(host); | |
2439 | host->trigger_card_event = false; | |
2440 | } | |
2441 | ||
807e8e40 | 2442 | if (host->rescan_disable) |
4c2ef25f | 2443 | return; |
1da177e4 | 2444 | |
3339d1e3 JR |
2445 | /* If there is a non-removable card registered, only scan once */ |
2446 | if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) | |
2447 | return; | |
2448 | host->rescan_entered = 1; | |
2449 | ||
7ea239d9 | 2450 | mmc_bus_get(host); |
b855885e | 2451 | |
30201e7f OBC |
2452 | /* |
2453 | * if there is a _removable_ card registered, check whether it is | |
2454 | * still present | |
2455 | */ | |
5601aaf7 | 2456 | if (host->bus_ops && !host->bus_dead |
bad3baba | 2457 | && !(host->caps & MMC_CAP_NONREMOVABLE)) |
94d89efb JS |
2458 | host->bus_ops->detect(host); |
2459 | ||
d3049504 AH |
2460 | host->detect_change = 0; |
2461 | ||
c5841798 CB |
2462 | /* |
2463 | * Let mmc_bus_put() free the bus/bus_ops if we've found that | |
2464 | * the card is no longer present. | |
2465 | */ | |
94d89efb | 2466 | mmc_bus_put(host); |
94d89efb JS |
2467 | mmc_bus_get(host); |
2468 | ||
2469 | /* if there still is a card present, stop here */ | |
2470 | if (host->bus_ops != NULL) { | |
7ea239d9 | 2471 | mmc_bus_put(host); |
94d89efb JS |
2472 | goto out; |
2473 | } | |
1da177e4 | 2474 | |
94d89efb JS |
2475 | /* |
2476 | * Only we can add a new handler, so it's safe to | |
2477 | * release the lock here. | |
2478 | */ | |
2479 | mmc_bus_put(host); | |
1da177e4 | 2480 | |
c1b55bfc SH |
2481 | if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && |
2482 | host->ops->get_cd(host) == 0) { | |
fa550189 UH |
2483 | mmc_claim_host(host); |
2484 | mmc_power_off(host); | |
2485 | mmc_release_host(host); | |
94d89efb | 2486 | goto out; |
fa550189 | 2487 | } |
1da177e4 | 2488 | |
807e8e40 | 2489 | mmc_claim_host(host); |
88ae8b86 | 2490 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
807e8e40 AR |
2491 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
2492 | break; | |
06b2233a | 2493 | if (freqs[i] <= host->f_min) |
807e8e40 | 2494 | break; |
88ae8b86 | 2495 | } |
807e8e40 AR |
2496 | mmc_release_host(host); |
2497 | ||
2498 | out: | |
28f52482 AV |
2499 | if (host->caps & MMC_CAP_NEEDS_POLL) |
2500 | mmc_schedule_delayed_work(&host->detect, HZ); | |
1da177e4 LT |
2501 | } |
2502 | ||
b93931a6 | 2503 | void mmc_start_host(struct mmc_host *host) |
1da177e4 | 2504 | { |
fa550189 | 2505 | host->f_init = max(freqs[0], host->f_min); |
d9adcc12 | 2506 | host->rescan_disable = 0; |
8af465db | 2507 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
a08b17be AH |
2508 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
2509 | mmc_power_off(host); | |
2510 | else | |
4a065193 | 2511 | mmc_power_up(host, host->ocr_avail); |
740a221e | 2512 | mmc_gpiod_request_cd_irq(host); |
bbd43682 | 2513 | _mmc_detect_change(host, 0, false); |
1da177e4 LT |
2514 | } |
2515 | ||
b93931a6 | 2516 | void mmc_stop_host(struct mmc_host *host) |
1da177e4 | 2517 | { |
3b91e550 | 2518 | #ifdef CONFIG_MMC_DEBUG |
1efd48b3 PO |
2519 | unsigned long flags; |
2520 | spin_lock_irqsave(&host->lock, flags); | |
3b91e550 | 2521 | host->removed = 1; |
1efd48b3 | 2522 | spin_unlock_irqrestore(&host->lock, flags); |
3b91e550 | 2523 | #endif |
740a221e AH |
2524 | if (host->slot.cd_irq >= 0) |
2525 | disable_irq(host->slot.cd_irq); | |
3b91e550 | 2526 | |
d9adcc12 | 2527 | host->rescan_disable = 1; |
d9bcbf34 | 2528 | cancel_delayed_work_sync(&host->detect); |
3b91e550 PO |
2529 | mmc_flush_scheduled_work(); |
2530 | ||
da68c4eb NP |
2531 | /* clear pm flags now and let card drivers set them as needed */ |
2532 | host->pm_flags = 0; | |
2533 | ||
7ea239d9 PO |
2534 | mmc_bus_get(host); |
2535 | if (host->bus_ops && !host->bus_dead) { | |
0db13fc2 | 2536 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2537 | host->bus_ops->remove(host); |
7ea239d9 PO |
2538 | mmc_claim_host(host); |
2539 | mmc_detach_bus(host); | |
7f7e4129 | 2540 | mmc_power_off(host); |
7ea239d9 | 2541 | mmc_release_host(host); |
53509f0f DK |
2542 | mmc_bus_put(host); |
2543 | return; | |
1da177e4 | 2544 | } |
7ea239d9 PO |
2545 | mmc_bus_put(host); |
2546 | ||
2547 | BUG_ON(host->card); | |
1da177e4 LT |
2548 | |
2549 | mmc_power_off(host); | |
2550 | } | |
2551 | ||
12ae637f | 2552 | int mmc_power_save_host(struct mmc_host *host) |
eae1aeee | 2553 | { |
12ae637f OBC |
2554 | int ret = 0; |
2555 | ||
bb9cab94 DD |
2556 | #ifdef CONFIG_MMC_DEBUG |
2557 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); | |
2558 | #endif | |
2559 | ||
eae1aeee AH |
2560 | mmc_bus_get(host); |
2561 | ||
5601aaf7 | 2562 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2563 | mmc_bus_put(host); |
12ae637f | 2564 | return -EINVAL; |
eae1aeee AH |
2565 | } |
2566 | ||
2567 | if (host->bus_ops->power_save) | |
12ae637f | 2568 | ret = host->bus_ops->power_save(host); |
eae1aeee AH |
2569 | |
2570 | mmc_bus_put(host); | |
2571 | ||
2572 | mmc_power_off(host); | |
12ae637f OBC |
2573 | |
2574 | return ret; | |
eae1aeee AH |
2575 | } |
2576 | EXPORT_SYMBOL(mmc_power_save_host); | |
2577 | ||
12ae637f | 2578 | int mmc_power_restore_host(struct mmc_host *host) |
eae1aeee | 2579 | { |
12ae637f OBC |
2580 | int ret; |
2581 | ||
bb9cab94 DD |
2582 | #ifdef CONFIG_MMC_DEBUG |
2583 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); | |
2584 | #endif | |
2585 | ||
eae1aeee AH |
2586 | mmc_bus_get(host); |
2587 | ||
5601aaf7 | 2588 | if (!host->bus_ops || host->bus_dead) { |
eae1aeee | 2589 | mmc_bus_put(host); |
12ae637f | 2590 | return -EINVAL; |
eae1aeee AH |
2591 | } |
2592 | ||
69041150 | 2593 | mmc_power_up(host, host->card->ocr); |
12ae637f | 2594 | ret = host->bus_ops->power_restore(host); |
eae1aeee AH |
2595 | |
2596 | mmc_bus_put(host); | |
12ae637f OBC |
2597 | |
2598 | return ret; | |
eae1aeee AH |
2599 | } |
2600 | EXPORT_SYMBOL(mmc_power_restore_host); | |
2601 | ||
881d1c25 SJ |
2602 | /* |
2603 | * Flush the cache to the non-volatile storage. | |
2604 | */ | |
2605 | int mmc_flush_cache(struct mmc_card *card) | |
2606 | { | |
881d1c25 SJ |
2607 | int err = 0; |
2608 | ||
881d1c25 SJ |
2609 | if (mmc_card_mmc(card) && |
2610 | (card->ext_csd.cache_size > 0) && | |
2611 | (card->ext_csd.cache_ctrl & 1)) { | |
2612 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
2613 | EXT_CSD_FLUSH_CACHE, 1, 0); | |
2614 | if (err) | |
2615 | pr_err("%s: cache flush error %d\n", | |
2616 | mmc_hostname(card->host), err); | |
2617 | } | |
2618 | ||
2619 | return err; | |
2620 | } | |
2621 | EXPORT_SYMBOL(mmc_flush_cache); | |
2622 | ||
1da177e4 LT |
2623 | #ifdef CONFIG_PM |
2624 | ||
4c2ef25f ML |
2625 | /* Do the card removal on suspend if card is assumed removeable |
2626 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able | |
2627 | to sync the card. | |
2628 | */ | |
2629 | int mmc_pm_notify(struct notifier_block *notify_block, | |
2630 | unsigned long mode, void *unused) | |
2631 | { | |
2632 | struct mmc_host *host = container_of( | |
2633 | notify_block, struct mmc_host, pm_notify); | |
2634 | unsigned long flags; | |
810caddb | 2635 | int err = 0; |
4c2ef25f ML |
2636 | |
2637 | switch (mode) { | |
2638 | case PM_HIBERNATION_PREPARE: | |
2639 | case PM_SUSPEND_PREPARE: | |
4c2ef25f ML |
2640 | spin_lock_irqsave(&host->lock, flags); |
2641 | host->rescan_disable = 1; | |
2642 | spin_unlock_irqrestore(&host->lock, flags); | |
2643 | cancel_delayed_work_sync(&host->detect); | |
2644 | ||
810caddb UH |
2645 | if (!host->bus_ops) |
2646 | break; | |
2647 | ||
2648 | /* Validate prerequisites for suspend */ | |
2649 | if (host->bus_ops->pre_suspend) | |
2650 | err = host->bus_ops->pre_suspend(host); | |
5601aaf7 | 2651 | if (!err) |
4c2ef25f ML |
2652 | break; |
2653 | ||
0db13fc2 | 2654 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
58a8a4a1 | 2655 | host->bus_ops->remove(host); |
0db13fc2 | 2656 | mmc_claim_host(host); |
4c2ef25f | 2657 | mmc_detach_bus(host); |
7f7e4129 | 2658 | mmc_power_off(host); |
4c2ef25f ML |
2659 | mmc_release_host(host); |
2660 | host->pm_flags = 0; | |
2661 | break; | |
2662 | ||
2663 | case PM_POST_SUSPEND: | |
2664 | case PM_POST_HIBERNATION: | |
274476f8 | 2665 | case PM_POST_RESTORE: |
4c2ef25f ML |
2666 | |
2667 | spin_lock_irqsave(&host->lock, flags); | |
2668 | host->rescan_disable = 0; | |
2669 | spin_unlock_irqrestore(&host->lock, flags); | |
bbd43682 | 2670 | _mmc_detect_change(host, 0, false); |
4c2ef25f ML |
2671 | |
2672 | } | |
2673 | ||
2674 | return 0; | |
2675 | } | |
1da177e4 LT |
2676 | #endif |
2677 | ||
2220eedf KD |
2678 | /** |
2679 | * mmc_init_context_info() - init synchronization context | |
2680 | * @host: mmc host | |
2681 | * | |
2682 | * Init struct context_info needed to implement asynchronous | |
2683 | * request mechanism, used by mmc core, host driver and mmc requests | |
2684 | * supplier. | |
2685 | */ | |
2686 | void mmc_init_context_info(struct mmc_host *host) | |
2687 | { | |
2688 | spin_lock_init(&host->context_info.lock); | |
2689 | host->context_info.is_new_req = false; | |
2690 | host->context_info.is_done_rcv = false; | |
2691 | host->context_info.is_waiting_last_req = false; | |
2692 | init_waitqueue_head(&host->context_info.wait); | |
2693 | } | |
2694 | ||
ffce2e7e PO |
2695 | static int __init mmc_init(void) |
2696 | { | |
2697 | int ret; | |
2698 | ||
0d9ee5b2 | 2699 | workqueue = alloc_ordered_workqueue("kmmcd", 0); |
ffce2e7e PO |
2700 | if (!workqueue) |
2701 | return -ENOMEM; | |
2702 | ||
2703 | ret = mmc_register_bus(); | |
e29a7d73 PO |
2704 | if (ret) |
2705 | goto destroy_workqueue; | |
2706 | ||
2707 | ret = mmc_register_host_class(); | |
2708 | if (ret) | |
2709 | goto unregister_bus; | |
2710 | ||
2711 | ret = sdio_register_bus(); | |
2712 | if (ret) | |
2713 | goto unregister_host_class; | |
2714 | ||
2715 | return 0; | |
2716 | ||
2717 | unregister_host_class: | |
2718 | mmc_unregister_host_class(); | |
2719 | unregister_bus: | |
2720 | mmc_unregister_bus(); | |
2721 | destroy_workqueue: | |
2722 | destroy_workqueue(workqueue); | |
2723 | ||
ffce2e7e PO |
2724 | return ret; |
2725 | } | |
2726 | ||
2727 | static void __exit mmc_exit(void) | |
2728 | { | |
e29a7d73 | 2729 | sdio_unregister_bus(); |
ffce2e7e PO |
2730 | mmc_unregister_host_class(); |
2731 | mmc_unregister_bus(); | |
2732 | destroy_workqueue(workqueue); | |
2733 | } | |
2734 | ||
26074962 | 2735 | subsys_initcall(mmc_init); |
ffce2e7e PO |
2736 | module_exit(mmc_exit); |
2737 | ||
1da177e4 | 2738 | MODULE_LICENSE("GPL"); |