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