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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/mmc/core/mmc_ops.h
4 *
5 * Copyright 2006-2007 Pierre Ossman
6 */
7
8#include <linux/slab.h>
9#include <linux/export.h>
10#include <linux/types.h>
11#include <linux/scatterlist.h>
12
13#include <linux/mmc/host.h>
14#include <linux/mmc/card.h>
15#include <linux/mmc/mmc.h>
16
17#include "core.h"
18#include "card.h"
19#include "host.h"
20#include "mmc_ops.h"
21
22#define MMC_BKOPS_TIMEOUT_MS (120 * 1000) /* 120s */
23#define MMC_SANITIZE_TIMEOUT_MS (240 * 1000) /* 240s */
24#define MMC_OP_COND_PERIOD_US (4 * 1000) /* 4ms */
25#define MMC_OP_COND_TIMEOUT_MS 1000 /* 1s */
26
27static const u8 tuning_blk_pattern_4bit[] = {
28 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
29 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
30 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
31 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
32 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
33 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
34 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
35 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
36};
37
38static const u8 tuning_blk_pattern_8bit[] = {
39 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
40 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
41 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
42 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
43 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
44 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
45 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
46 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
47 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
48 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
49 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
50 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
51 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
52 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
53 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
54 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
55};
56
57struct mmc_busy_data {
58 struct mmc_card *card;
59 bool retry_crc_err;
60 enum mmc_busy_cmd busy_cmd;
61};
62
63struct mmc_op_cond_busy_data {
64 struct mmc_host *host;
65 u32 ocr;
66 struct mmc_command *cmd;
67};
68
69int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
70{
71 int err;
72 struct mmc_command cmd = {};
73
74 cmd.opcode = MMC_SEND_STATUS;
75 if (!mmc_host_is_spi(card->host))
76 cmd.arg = card->rca << 16;
77 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
78
79 err = mmc_wait_for_cmd(card->host, &cmd, retries);
80 if (err)
81 return err;
82
83 /* NOTE: callers are required to understand the difference
84 * between "native" and SPI format status words!
85 */
86 if (status)
87 *status = cmd.resp[0];
88
89 return 0;
90}
91EXPORT_SYMBOL_GPL(__mmc_send_status);
92
93int mmc_send_status(struct mmc_card *card, u32 *status)
94{
95 return __mmc_send_status(card, status, MMC_CMD_RETRIES);
96}
97EXPORT_SYMBOL_GPL(mmc_send_status);
98
99static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
100{
101 struct mmc_command cmd = {};
102
103 cmd.opcode = MMC_SELECT_CARD;
104
105 if (card) {
106 cmd.arg = card->rca << 16;
107 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
108 } else {
109 cmd.arg = 0;
110 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
111 }
112
113 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
114}
115
116int mmc_select_card(struct mmc_card *card)
117{
118
119 return _mmc_select_card(card->host, card);
120}
121
122int mmc_deselect_cards(struct mmc_host *host)
123{
124 return _mmc_select_card(host, NULL);
125}
126
127/*
128 * Write the value specified in the device tree or board code into the optional
129 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
130 * drive strength of the DAT and CMD outputs. The actual meaning of a given
131 * value is hardware dependant.
132 * The presence of the DSR register can be determined from the CSD register,
133 * bit 76.
134 */
135int mmc_set_dsr(struct mmc_host *host)
136{
137 struct mmc_command cmd = {};
138
139 cmd.opcode = MMC_SET_DSR;
140
141 cmd.arg = (host->dsr << 16) | 0xffff;
142 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
143
144 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
145}
146
147int mmc_go_idle(struct mmc_host *host)
148{
149 int err;
150 struct mmc_command cmd = {};
151
152 /*
153 * Non-SPI hosts need to prevent chipselect going active during
154 * GO_IDLE; that would put chips into SPI mode. Remind them of
155 * that in case of hardware that won't pull up DAT3/nCS otherwise.
156 *
157 * SPI hosts ignore ios.chip_select; it's managed according to
158 * rules that must accommodate non-MMC slaves which this layer
159 * won't even know about.
160 */
161 if (!mmc_host_is_spi(host)) {
162 mmc_set_chip_select(host, MMC_CS_HIGH);
163 mmc_delay(1);
164 }
165
166 cmd.opcode = MMC_GO_IDLE_STATE;
167 cmd.arg = 0;
168 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
169
170 err = mmc_wait_for_cmd(host, &cmd, 0);
171
172 mmc_delay(1);
173
174 if (!mmc_host_is_spi(host)) {
175 mmc_set_chip_select(host, MMC_CS_DONTCARE);
176 mmc_delay(1);
177 }
178
179 host->use_spi_crc = 0;
180
181 return err;
182}
183
184static int __mmc_send_op_cond_cb(void *cb_data, bool *busy)
185{
186 struct mmc_op_cond_busy_data *data = cb_data;
187 struct mmc_host *host = data->host;
188 struct mmc_command *cmd = data->cmd;
189 u32 ocr = data->ocr;
190 int err = 0;
191
192 err = mmc_wait_for_cmd(host, cmd, 0);
193 if (err)
194 return err;
195
196 if (mmc_host_is_spi(host)) {
197 if (!(cmd->resp[0] & R1_SPI_IDLE)) {
198 *busy = false;
199 return 0;
200 }
201 } else {
202 if (cmd->resp[0] & MMC_CARD_BUSY) {
203 *busy = false;
204 return 0;
205 }
206 }
207
208 *busy = true;
209
210 /*
211 * According to eMMC specification v5.1 section 6.4.3, we
212 * should issue CMD1 repeatedly in the idle state until
213 * the eMMC is ready. Otherwise some eMMC devices seem to enter
214 * the inactive mode after mmc_init_card() issued CMD0 when
215 * the eMMC device is busy.
216 */
217 if (!ocr && !mmc_host_is_spi(host))
218 cmd->arg = cmd->resp[0] | BIT(30);
219
220 return 0;
221}
222
223int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
224{
225 struct mmc_command cmd = {};
226 int err = 0;
227 struct mmc_op_cond_busy_data cb_data = {
228 .host = host,
229 .ocr = ocr,
230 .cmd = &cmd
231 };
232
233 cmd.opcode = MMC_SEND_OP_COND;
234 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
235 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
236
237 err = __mmc_poll_for_busy(host, MMC_OP_COND_PERIOD_US,
238 MMC_OP_COND_TIMEOUT_MS,
239 &__mmc_send_op_cond_cb, &cb_data);
240 if (err)
241 return err;
242
243 if (rocr && !mmc_host_is_spi(host))
244 *rocr = cmd.resp[0];
245
246 return err;
247}
248
249int mmc_set_relative_addr(struct mmc_card *card)
250{
251 struct mmc_command cmd = {};
252
253 cmd.opcode = MMC_SET_RELATIVE_ADDR;
254 cmd.arg = card->rca << 16;
255 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
256
257 return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
258}
259
260static int
261mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
262{
263 int err;
264 struct mmc_command cmd = {};
265
266 cmd.opcode = opcode;
267 cmd.arg = arg;
268 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
269
270 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
271 if (err)
272 return err;
273
274 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
275
276 return 0;
277}
278
279/*
280 * NOTE: void *buf, caller for the buf is required to use DMA-capable
281 * buffer or on-stack buffer (with some overhead in callee).
282 */
283int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode,
284 u32 args, void *buf, unsigned len)
285{
286 struct mmc_request mrq = {};
287 struct mmc_command cmd = {};
288 struct mmc_data data = {};
289 struct scatterlist sg;
290
291 mrq.cmd = &cmd;
292 mrq.data = &data;
293
294 cmd.opcode = opcode;
295 cmd.arg = args;
296
297 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
298 * rely on callers to never use this with "native" calls for reading
299 * CSD or CID. Native versions of those commands use the R2 type,
300 * not R1 plus a data block.
301 */
302 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
303
304 data.blksz = len;
305 data.blocks = 1;
306 data.flags = MMC_DATA_READ;
307 data.sg = &sg;
308 data.sg_len = 1;
309
310 sg_init_one(&sg, buf, len);
311
312 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
313 /*
314 * The spec states that CSR and CID accesses have a timeout
315 * of 64 clock cycles.
316 */
317 data.timeout_ns = 0;
318 data.timeout_clks = 64;
319 } else
320 mmc_set_data_timeout(&data, card);
321
322 mmc_wait_for_req(host, &mrq);
323
324 if (cmd.error)
325 return cmd.error;
326 if (data.error)
327 return data.error;
328
329 return 0;
330}
331
332static int mmc_spi_send_cxd(struct mmc_host *host, u32 *cxd, u32 opcode)
333{
334 int ret, i;
335 __be32 *cxd_tmp;
336
337 cxd_tmp = kzalloc(16, GFP_KERNEL);
338 if (!cxd_tmp)
339 return -ENOMEM;
340
341 ret = mmc_send_adtc_data(NULL, host, opcode, 0, cxd_tmp, 16);
342 if (ret)
343 goto err;
344
345 for (i = 0; i < 4; i++)
346 cxd[i] = be32_to_cpu(cxd_tmp[i]);
347
348err:
349 kfree(cxd_tmp);
350 return ret;
351}
352
353int mmc_send_csd(struct mmc_card *card, u32 *csd)
354{
355 if (mmc_host_is_spi(card->host))
356 return mmc_spi_send_cxd(card->host, csd, MMC_SEND_CSD);
357
358 return mmc_send_cxd_native(card->host, card->rca << 16, csd,
359 MMC_SEND_CSD);
360}
361
362int mmc_send_cid(struct mmc_host *host, u32 *cid)
363{
364 if (mmc_host_is_spi(host))
365 return mmc_spi_send_cxd(host, cid, MMC_SEND_CID);
366
367 return mmc_send_cxd_native(host, 0, cid, MMC_ALL_SEND_CID);
368}
369
370int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
371{
372 int err;
373 u8 *ext_csd;
374
375 if (!card || !new_ext_csd)
376 return -EINVAL;
377
378 if (!mmc_can_ext_csd(card))
379 return -EOPNOTSUPP;
380
381 /*
382 * As the ext_csd is so large and mostly unused, we don't store the
383 * raw block in mmc_card.
384 */
385 ext_csd = kzalloc(512, GFP_KERNEL);
386 if (!ext_csd)
387 return -ENOMEM;
388
389 err = mmc_send_adtc_data(card, card->host, MMC_SEND_EXT_CSD, 0, ext_csd,
390 512);
391 if (err)
392 kfree(ext_csd);
393 else
394 *new_ext_csd = ext_csd;
395
396 return err;
397}
398EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
399
400int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
401{
402 struct mmc_command cmd = {};
403 int err;
404
405 cmd.opcode = MMC_SPI_READ_OCR;
406 cmd.arg = highcap ? (1 << 30) : 0;
407 cmd.flags = MMC_RSP_SPI_R3;
408
409 err = mmc_wait_for_cmd(host, &cmd, 0);
410
411 *ocrp = cmd.resp[1];
412 return err;
413}
414
415int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
416{
417 struct mmc_command cmd = {};
418 int err;
419
420 cmd.opcode = MMC_SPI_CRC_ON_OFF;
421 cmd.flags = MMC_RSP_SPI_R1;
422 cmd.arg = use_crc;
423
424 err = mmc_wait_for_cmd(host, &cmd, 0);
425 if (!err)
426 host->use_spi_crc = use_crc;
427 return err;
428}
429
430static int mmc_switch_status_error(struct mmc_host *host, u32 status)
431{
432 if (mmc_host_is_spi(host)) {
433 if (status & R1_SPI_ILLEGAL_COMMAND)
434 return -EBADMSG;
435 } else {
436 if (R1_STATUS(status))
437 pr_warn("%s: unexpected status %#x after switch\n",
438 mmc_hostname(host), status);
439 if (status & R1_SWITCH_ERROR)
440 return -EBADMSG;
441 }
442 return 0;
443}
444
445/* Caller must hold re-tuning */
446int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
447{
448 u32 status;
449 int err;
450
451 err = mmc_send_status(card, &status);
452 if (!crc_err_fatal && err == -EILSEQ)
453 return 0;
454 if (err)
455 return err;
456
457 return mmc_switch_status_error(card->host, status);
458}
459
460static int mmc_busy_cb(void *cb_data, bool *busy)
461{
462 struct mmc_busy_data *data = cb_data;
463 struct mmc_host *host = data->card->host;
464 u32 status = 0;
465 int err;
466
467 if (data->busy_cmd != MMC_BUSY_IO && host->ops->card_busy) {
468 *busy = host->ops->card_busy(host);
469 return 0;
470 }
471
472 err = mmc_send_status(data->card, &status);
473 if (data->retry_crc_err && err == -EILSEQ) {
474 *busy = true;
475 return 0;
476 }
477 if (err)
478 return err;
479
480 switch (data->busy_cmd) {
481 case MMC_BUSY_CMD6:
482 err = mmc_switch_status_error(host, status);
483 break;
484 case MMC_BUSY_ERASE:
485 err = R1_STATUS(status) ? -EIO : 0;
486 break;
487 case MMC_BUSY_HPI:
488 case MMC_BUSY_EXTR_SINGLE:
489 case MMC_BUSY_IO:
490 break;
491 default:
492 err = -EINVAL;
493 }
494
495 if (err)
496 return err;
497
498 *busy = !mmc_ready_for_data(status);
499 return 0;
500}
501
502int __mmc_poll_for_busy(struct mmc_host *host, unsigned int period_us,
503 unsigned int timeout_ms,
504 int (*busy_cb)(void *cb_data, bool *busy),
505 void *cb_data)
506{
507 int err;
508 unsigned long timeout;
509 unsigned int udelay = period_us ? period_us : 32, udelay_max = 32768;
510 bool expired = false;
511 bool busy = false;
512
513 timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
514 do {
515 /*
516 * Due to the possibility of being preempted while polling,
517 * check the expiration time first.
518 */
519 expired = time_after(jiffies, timeout);
520
521 err = (*busy_cb)(cb_data, &busy);
522 if (err)
523 return err;
524
525 /* Timeout if the device still remains busy. */
526 if (expired && busy) {
527 pr_err("%s: Card stuck being busy! %s\n",
528 mmc_hostname(host), __func__);
529 return -ETIMEDOUT;
530 }
531
532 /* Throttle the polling rate to avoid hogging the CPU. */
533 if (busy) {
534 usleep_range(udelay, udelay * 2);
535 if (udelay < udelay_max)
536 udelay *= 2;
537 }
538 } while (busy);
539
540 return 0;
541}
542EXPORT_SYMBOL_GPL(__mmc_poll_for_busy);
543
544int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
545 bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
546{
547 struct mmc_host *host = card->host;
548 struct mmc_busy_data cb_data;
549
550 cb_data.card = card;
551 cb_data.retry_crc_err = retry_crc_err;
552 cb_data.busy_cmd = busy_cmd;
553
554 return __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_busy_cb, &cb_data);
555}
556EXPORT_SYMBOL_GPL(mmc_poll_for_busy);
557
558bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
559 unsigned int timeout_ms)
560{
561 /*
562 * If the max_busy_timeout of the host is specified, make sure it's
563 * enough to fit the used timeout_ms. In case it's not, let's instruct
564 * the host to avoid HW busy detection, by converting to a R1 response
565 * instead of a R1B. Note, some hosts requires R1B, which also means
566 * they are on their own when it comes to deal with the busy timeout.
567 */
568 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
569 (timeout_ms > host->max_busy_timeout)) {
570 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1 | MMC_RSP_R1;
571 return false;
572 }
573
574 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1B | MMC_RSP_R1B;
575 cmd->busy_timeout = timeout_ms;
576 return true;
577}
578
579/**
580 * __mmc_switch - modify EXT_CSD register
581 * @card: the MMC card associated with the data transfer
582 * @set: cmd set values
583 * @index: EXT_CSD register index
584 * @value: value to program into EXT_CSD register
585 * @timeout_ms: timeout (ms) for operation performed by register write,
586 * timeout of zero implies maximum possible timeout
587 * @timing: new timing to change to
588 * @send_status: send status cmd to poll for busy
589 * @retry_crc_err: retry when CRC errors when polling with CMD13 for busy
590 * @retries: number of retries
591 *
592 * Modifies the EXT_CSD register for selected card.
593 */
594int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
595 unsigned int timeout_ms, unsigned char timing,
596 bool send_status, bool retry_crc_err, unsigned int retries)
597{
598 struct mmc_host *host = card->host;
599 int err;
600 struct mmc_command cmd = {};
601 bool use_r1b_resp;
602 unsigned char old_timing = host->ios.timing;
603
604 mmc_retune_hold(host);
605
606 if (!timeout_ms) {
607 pr_warn("%s: unspecified timeout for CMD6 - use generic\n",
608 mmc_hostname(host));
609 timeout_ms = card->ext_csd.generic_cmd6_time;
610 }
611
612 cmd.opcode = MMC_SWITCH;
613 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
614 (index << 16) |
615 (value << 8) |
616 set;
617 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
618
619 err = mmc_wait_for_cmd(host, &cmd, retries);
620 if (err)
621 goto out;
622
623 /*If SPI or used HW busy detection above, then we don't need to poll. */
624 if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
625 mmc_host_is_spi(host))
626 goto out_tim;
627
628 /*
629 * If the host doesn't support HW polling via the ->card_busy() ops and
630 * when it's not allowed to poll by using CMD13, then we need to rely on
631 * waiting the stated timeout to be sufficient.
632 */
633 if (!send_status && !host->ops->card_busy) {
634 mmc_delay(timeout_ms);
635 goto out_tim;
636 }
637
638 /* Let's try to poll to find out when the command is completed. */
639 err = mmc_poll_for_busy(card, timeout_ms, retry_crc_err, MMC_BUSY_CMD6);
640 if (err)
641 goto out;
642
643out_tim:
644 /* Switch to new timing before check switch status. */
645 if (timing)
646 mmc_set_timing(host, timing);
647
648 if (send_status) {
649 err = mmc_switch_status(card, true);
650 if (err && timing)
651 mmc_set_timing(host, old_timing);
652 }
653out:
654 mmc_retune_release(host);
655
656 return err;
657}
658
659int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
660 unsigned int timeout_ms)
661{
662 return __mmc_switch(card, set, index, value, timeout_ms, 0,
663 true, false, MMC_CMD_RETRIES);
664}
665EXPORT_SYMBOL_GPL(mmc_switch);
666
667int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
668{
669 struct mmc_request mrq = {};
670 struct mmc_command cmd = {};
671 struct mmc_data data = {};
672 struct scatterlist sg;
673 struct mmc_ios *ios = &host->ios;
674 const u8 *tuning_block_pattern;
675 int size, err = 0;
676 u8 *data_buf;
677
678 if (ios->bus_width == MMC_BUS_WIDTH_8) {
679 tuning_block_pattern = tuning_blk_pattern_8bit;
680 size = sizeof(tuning_blk_pattern_8bit);
681 } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
682 tuning_block_pattern = tuning_blk_pattern_4bit;
683 size = sizeof(tuning_blk_pattern_4bit);
684 } else
685 return -EINVAL;
686
687 data_buf = kzalloc(size, GFP_KERNEL);
688 if (!data_buf)
689 return -ENOMEM;
690
691 mrq.cmd = &cmd;
692 mrq.data = &data;
693
694 cmd.opcode = opcode;
695 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
696
697 data.blksz = size;
698 data.blocks = 1;
699 data.flags = MMC_DATA_READ;
700
701 /*
702 * According to the tuning specs, Tuning process
703 * is normally shorter 40 executions of CMD19,
704 * and timeout value should be shorter than 150 ms
705 */
706 data.timeout_ns = 150 * NSEC_PER_MSEC;
707
708 data.sg = &sg;
709 data.sg_len = 1;
710 sg_init_one(&sg, data_buf, size);
711
712 mmc_wait_for_req(host, &mrq);
713
714 if (cmd_error)
715 *cmd_error = cmd.error;
716
717 if (cmd.error) {
718 err = cmd.error;
719 goto out;
720 }
721
722 if (data.error) {
723 err = data.error;
724 goto out;
725 }
726
727 if (memcmp(data_buf, tuning_block_pattern, size))
728 err = -EIO;
729
730out:
731 kfree(data_buf);
732 return err;
733}
734EXPORT_SYMBOL_GPL(mmc_send_tuning);
735
736int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode)
737{
738 struct mmc_command cmd = {};
739
740 /*
741 * eMMC specification specifies that CMD12 can be used to stop a tuning
742 * command, but SD specification does not, so do nothing unless it is
743 * eMMC.
744 */
745 if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
746 return 0;
747
748 cmd.opcode = MMC_STOP_TRANSMISSION;
749 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
750
751 /*
752 * For drivers that override R1 to R1b, set an arbitrary timeout based
753 * on the tuning timeout i.e. 150ms.
754 */
755 cmd.busy_timeout = 150;
756
757 return mmc_wait_for_cmd(host, &cmd, 0);
758}
759EXPORT_SYMBOL_GPL(mmc_send_abort_tuning);
760
761static int
762mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
763 u8 len)
764{
765 struct mmc_request mrq = {};
766 struct mmc_command cmd = {};
767 struct mmc_data data = {};
768 struct scatterlist sg;
769 u8 *data_buf;
770 u8 *test_buf;
771 int i, err;
772 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
773 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
774
775 /* dma onto stack is unsafe/nonportable, but callers to this
776 * routine normally provide temporary on-stack buffers ...
777 */
778 data_buf = kmalloc(len, GFP_KERNEL);
779 if (!data_buf)
780 return -ENOMEM;
781
782 if (len == 8)
783 test_buf = testdata_8bit;
784 else if (len == 4)
785 test_buf = testdata_4bit;
786 else {
787 pr_err("%s: Invalid bus_width %d\n",
788 mmc_hostname(host), len);
789 kfree(data_buf);
790 return -EINVAL;
791 }
792
793 if (opcode == MMC_BUS_TEST_W)
794 memcpy(data_buf, test_buf, len);
795
796 mrq.cmd = &cmd;
797 mrq.data = &data;
798 cmd.opcode = opcode;
799 cmd.arg = 0;
800
801 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
802 * rely on callers to never use this with "native" calls for reading
803 * CSD or CID. Native versions of those commands use the R2 type,
804 * not R1 plus a data block.
805 */
806 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
807
808 data.blksz = len;
809 data.blocks = 1;
810 if (opcode == MMC_BUS_TEST_R)
811 data.flags = MMC_DATA_READ;
812 else
813 data.flags = MMC_DATA_WRITE;
814
815 data.sg = &sg;
816 data.sg_len = 1;
817 mmc_set_data_timeout(&data, card);
818 sg_init_one(&sg, data_buf, len);
819 mmc_wait_for_req(host, &mrq);
820 err = 0;
821 if (opcode == MMC_BUS_TEST_R) {
822 for (i = 0; i < len / 4; i++)
823 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
824 err = -EIO;
825 break;
826 }
827 }
828 kfree(data_buf);
829
830 if (cmd.error)
831 return cmd.error;
832 if (data.error)
833 return data.error;
834
835 return err;
836}
837
838int mmc_bus_test(struct mmc_card *card, u8 bus_width)
839{
840 int width;
841
842 if (bus_width == MMC_BUS_WIDTH_8)
843 width = 8;
844 else if (bus_width == MMC_BUS_WIDTH_4)
845 width = 4;
846 else if (bus_width == MMC_BUS_WIDTH_1)
847 return 0; /* no need for test */
848 else
849 return -EINVAL;
850
851 /*
852 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
853 * is a problem. This improves chances that the test will work.
854 */
855 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
856 return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
857}
858
859static int mmc_send_hpi_cmd(struct mmc_card *card)
860{
861 unsigned int busy_timeout_ms = card->ext_csd.out_of_int_time;
862 struct mmc_host *host = card->host;
863 bool use_r1b_resp = false;
864 struct mmc_command cmd = {};
865 int err;
866
867 cmd.opcode = card->ext_csd.hpi_cmd;
868 cmd.arg = card->rca << 16 | 1;
869 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
870
871 if (cmd.opcode == MMC_STOP_TRANSMISSION)
872 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd,
873 busy_timeout_ms);
874
875 err = mmc_wait_for_cmd(host, &cmd, 0);
876 if (err) {
877 pr_warn("%s: HPI error %d. Command response %#x\n",
878 mmc_hostname(host), err, cmd.resp[0]);
879 return err;
880 }
881
882 /* No need to poll when using HW busy detection. */
883 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
884 return 0;
885
886 /* Let's poll to find out when the HPI request completes. */
887 return mmc_poll_for_busy(card, busy_timeout_ms, false, MMC_BUSY_HPI);
888}
889
890/**
891 * mmc_interrupt_hpi - Issue for High priority Interrupt
892 * @card: the MMC card associated with the HPI transfer
893 *
894 * Issued High Priority Interrupt, and check for card status
895 * until out-of prg-state.
896 */
897static int mmc_interrupt_hpi(struct mmc_card *card)
898{
899 int err;
900 u32 status;
901
902 if (!card->ext_csd.hpi_en) {
903 pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
904 return 1;
905 }
906
907 err = mmc_send_status(card, &status);
908 if (err) {
909 pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
910 goto out;
911 }
912
913 switch (R1_CURRENT_STATE(status)) {
914 case R1_STATE_IDLE:
915 case R1_STATE_READY:
916 case R1_STATE_STBY:
917 case R1_STATE_TRAN:
918 /*
919 * In idle and transfer states, HPI is not needed and the caller
920 * can issue the next intended command immediately
921 */
922 goto out;
923 case R1_STATE_PRG:
924 break;
925 default:
926 /* In all other states, it's illegal to issue HPI */
927 pr_debug("%s: HPI cannot be sent. Card state=%d\n",
928 mmc_hostname(card->host), R1_CURRENT_STATE(status));
929 err = -EINVAL;
930 goto out;
931 }
932
933 err = mmc_send_hpi_cmd(card);
934out:
935 return err;
936}
937
938int mmc_can_ext_csd(struct mmc_card *card)
939{
940 return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
941}
942
943static int mmc_read_bkops_status(struct mmc_card *card)
944{
945 int err;
946 u8 *ext_csd;
947
948 err = mmc_get_ext_csd(card, &ext_csd);
949 if (err)
950 return err;
951
952 card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
953 card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
954 kfree(ext_csd);
955 return 0;
956}
957
958/**
959 * mmc_run_bkops - Run BKOPS for supported cards
960 * @card: MMC card to run BKOPS for
961 *
962 * Run background operations synchronously for cards having manual BKOPS
963 * enabled and in case it reports urgent BKOPS level.
964*/
965void mmc_run_bkops(struct mmc_card *card)
966{
967 int err;
968
969 if (!card->ext_csd.man_bkops_en)
970 return;
971
972 err = mmc_read_bkops_status(card);
973 if (err) {
974 pr_err("%s: Failed to read bkops status: %d\n",
975 mmc_hostname(card->host), err);
976 return;
977 }
978
979 if (!card->ext_csd.raw_bkops_status ||
980 card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
981 return;
982
983 mmc_retune_hold(card->host);
984
985 /*
986 * For urgent BKOPS status, LEVEL_2 and higher, let's execute
987 * synchronously. Future wise, we may consider to start BKOPS, for less
988 * urgent levels by using an asynchronous background task, when idle.
989 */
990 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
991 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
992 /*
993 * If the BKOPS timed out, the card is probably still busy in the
994 * R1_STATE_PRG. Rather than continue to wait, let's try to abort
995 * it with a HPI command to get back into R1_STATE_TRAN.
996 */
997 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
998 pr_warn("%s: BKOPS aborted\n", mmc_hostname(card->host));
999 else if (err)
1000 pr_warn("%s: Error %d running bkops\n",
1001 mmc_hostname(card->host), err);
1002
1003 mmc_retune_release(card->host);
1004}
1005EXPORT_SYMBOL(mmc_run_bkops);
1006
1007static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
1008{
1009 u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
1010 int err;
1011
1012 if (!card->ext_csd.cmdq_support)
1013 return -EOPNOTSUPP;
1014
1015 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
1016 val, card->ext_csd.generic_cmd6_time);
1017 if (!err)
1018 card->ext_csd.cmdq_en = enable;
1019
1020 return err;
1021}
1022
1023int mmc_cmdq_enable(struct mmc_card *card)
1024{
1025 return mmc_cmdq_switch(card, true);
1026}
1027EXPORT_SYMBOL_GPL(mmc_cmdq_enable);
1028
1029int mmc_cmdq_disable(struct mmc_card *card)
1030{
1031 return mmc_cmdq_switch(card, false);
1032}
1033EXPORT_SYMBOL_GPL(mmc_cmdq_disable);
1034
1035int mmc_sanitize(struct mmc_card *card, unsigned int timeout_ms)
1036{
1037 struct mmc_host *host = card->host;
1038 int err;
1039
1040 if (!mmc_can_sanitize(card)) {
1041 pr_warn("%s: Sanitize not supported\n", mmc_hostname(host));
1042 return -EOPNOTSUPP;
1043 }
1044
1045 if (!timeout_ms)
1046 timeout_ms = MMC_SANITIZE_TIMEOUT_MS;
1047
1048 pr_debug("%s: Sanitize in progress...\n", mmc_hostname(host));
1049
1050 mmc_retune_hold(host);
1051
1052 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_SANITIZE_START,
1053 1, timeout_ms, 0, true, false, 0);
1054 if (err)
1055 pr_err("%s: Sanitize failed err=%d\n", mmc_hostname(host), err);
1056
1057 /*
1058 * If the sanitize operation timed out, the card is probably still busy
1059 * in the R1_STATE_PRG. Rather than continue to wait, let's try to abort
1060 * it with a HPI command to get back into R1_STATE_TRAN.
1061 */
1062 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
1063 pr_warn("%s: Sanitize aborted\n", mmc_hostname(host));
1064
1065 mmc_retune_release(host);
1066
1067 pr_debug("%s: Sanitize completed\n", mmc_hostname(host));
1068 return err;
1069}
1070EXPORT_SYMBOL_GPL(mmc_sanitize);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/mmc/core/mmc_ops.h
4 *
5 * Copyright 2006-2007 Pierre Ossman
6 */
7
8#include <linux/slab.h>
9#include <linux/export.h>
10#include <linux/types.h>
11#include <linux/scatterlist.h>
12
13#include <linux/mmc/host.h>
14#include <linux/mmc/card.h>
15#include <linux/mmc/mmc.h>
16
17#include "core.h"
18#include "card.h"
19#include "host.h"
20#include "mmc_ops.h"
21
22#define MMC_BKOPS_TIMEOUT_MS (120 * 1000) /* 120s */
23#define MMC_SANITIZE_TIMEOUT_MS (240 * 1000) /* 240s */
24
25static const u8 tuning_blk_pattern_4bit[] = {
26 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
27 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
28 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
29 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
30 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
31 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
32 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
33 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
34};
35
36static const u8 tuning_blk_pattern_8bit[] = {
37 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
38 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
39 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
40 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
41 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
42 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
43 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
44 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
45 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
46 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
47 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
48 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
49 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
50 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
51 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
52 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
53};
54
55struct mmc_busy_data {
56 struct mmc_card *card;
57 bool retry_crc_err;
58 enum mmc_busy_cmd busy_cmd;
59};
60
61int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
62{
63 int err;
64 struct mmc_command cmd = {};
65
66 cmd.opcode = MMC_SEND_STATUS;
67 if (!mmc_host_is_spi(card->host))
68 cmd.arg = card->rca << 16;
69 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
70
71 err = mmc_wait_for_cmd(card->host, &cmd, retries);
72 if (err)
73 return err;
74
75 /* NOTE: callers are required to understand the difference
76 * between "native" and SPI format status words!
77 */
78 if (status)
79 *status = cmd.resp[0];
80
81 return 0;
82}
83EXPORT_SYMBOL_GPL(__mmc_send_status);
84
85int mmc_send_status(struct mmc_card *card, u32 *status)
86{
87 return __mmc_send_status(card, status, MMC_CMD_RETRIES);
88}
89EXPORT_SYMBOL_GPL(mmc_send_status);
90
91static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
92{
93 struct mmc_command cmd = {};
94
95 cmd.opcode = MMC_SELECT_CARD;
96
97 if (card) {
98 cmd.arg = card->rca << 16;
99 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
100 } else {
101 cmd.arg = 0;
102 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
103 }
104
105 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
106}
107
108int mmc_select_card(struct mmc_card *card)
109{
110
111 return _mmc_select_card(card->host, card);
112}
113
114int mmc_deselect_cards(struct mmc_host *host)
115{
116 return _mmc_select_card(host, NULL);
117}
118
119/*
120 * Write the value specified in the device tree or board code into the optional
121 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
122 * drive strength of the DAT and CMD outputs. The actual meaning of a given
123 * value is hardware dependant.
124 * The presence of the DSR register can be determined from the CSD register,
125 * bit 76.
126 */
127int mmc_set_dsr(struct mmc_host *host)
128{
129 struct mmc_command cmd = {};
130
131 cmd.opcode = MMC_SET_DSR;
132
133 cmd.arg = (host->dsr << 16) | 0xffff;
134 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
135
136 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
137}
138
139int mmc_go_idle(struct mmc_host *host)
140{
141 int err;
142 struct mmc_command cmd = {};
143
144 /*
145 * Non-SPI hosts need to prevent chipselect going active during
146 * GO_IDLE; that would put chips into SPI mode. Remind them of
147 * that in case of hardware that won't pull up DAT3/nCS otherwise.
148 *
149 * SPI hosts ignore ios.chip_select; it's managed according to
150 * rules that must accommodate non-MMC slaves which this layer
151 * won't even know about.
152 */
153 if (!mmc_host_is_spi(host)) {
154 mmc_set_chip_select(host, MMC_CS_HIGH);
155 mmc_delay(1);
156 }
157
158 cmd.opcode = MMC_GO_IDLE_STATE;
159 cmd.arg = 0;
160 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
161
162 err = mmc_wait_for_cmd(host, &cmd, 0);
163
164 mmc_delay(1);
165
166 if (!mmc_host_is_spi(host)) {
167 mmc_set_chip_select(host, MMC_CS_DONTCARE);
168 mmc_delay(1);
169 }
170
171 host->use_spi_crc = 0;
172
173 return err;
174}
175
176int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
177{
178 struct mmc_command cmd = {};
179 int i, err = 0;
180
181 cmd.opcode = MMC_SEND_OP_COND;
182 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
183 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
184
185 for (i = 100; i; i--) {
186 err = mmc_wait_for_cmd(host, &cmd, 0);
187 if (err)
188 break;
189
190 /* wait until reset completes */
191 if (mmc_host_is_spi(host)) {
192 if (!(cmd.resp[0] & R1_SPI_IDLE))
193 break;
194 } else {
195 if (cmd.resp[0] & MMC_CARD_BUSY)
196 break;
197 }
198
199 err = -ETIMEDOUT;
200
201 mmc_delay(10);
202
203 /*
204 * According to eMMC specification v5.1 section 6.4.3, we
205 * should issue CMD1 repeatedly in the idle state until
206 * the eMMC is ready. Otherwise some eMMC devices seem to enter
207 * the inactive mode after mmc_init_card() issued CMD0 when
208 * the eMMC device is busy.
209 */
210 if (!ocr && !mmc_host_is_spi(host))
211 cmd.arg = cmd.resp[0] | BIT(30);
212 }
213
214 if (rocr && !mmc_host_is_spi(host))
215 *rocr = cmd.resp[0];
216
217 return err;
218}
219
220int mmc_set_relative_addr(struct mmc_card *card)
221{
222 struct mmc_command cmd = {};
223
224 cmd.opcode = MMC_SET_RELATIVE_ADDR;
225 cmd.arg = card->rca << 16;
226 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
227
228 return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
229}
230
231static int
232mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
233{
234 int err;
235 struct mmc_command cmd = {};
236
237 cmd.opcode = opcode;
238 cmd.arg = arg;
239 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
240
241 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
242 if (err)
243 return err;
244
245 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
246
247 return 0;
248}
249
250/*
251 * NOTE: void *buf, caller for the buf is required to use DMA-capable
252 * buffer or on-stack buffer (with some overhead in callee).
253 */
254int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode,
255 u32 args, void *buf, unsigned len)
256{
257 struct mmc_request mrq = {};
258 struct mmc_command cmd = {};
259 struct mmc_data data = {};
260 struct scatterlist sg;
261
262 mrq.cmd = &cmd;
263 mrq.data = &data;
264
265 cmd.opcode = opcode;
266 cmd.arg = args;
267
268 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
269 * rely on callers to never use this with "native" calls for reading
270 * CSD or CID. Native versions of those commands use the R2 type,
271 * not R1 plus a data block.
272 */
273 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
274
275 data.blksz = len;
276 data.blocks = 1;
277 data.flags = MMC_DATA_READ;
278 data.sg = &sg;
279 data.sg_len = 1;
280
281 sg_init_one(&sg, buf, len);
282
283 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
284 /*
285 * The spec states that CSR and CID accesses have a timeout
286 * of 64 clock cycles.
287 */
288 data.timeout_ns = 0;
289 data.timeout_clks = 64;
290 } else
291 mmc_set_data_timeout(&data, card);
292
293 mmc_wait_for_req(host, &mrq);
294
295 if (cmd.error)
296 return cmd.error;
297 if (data.error)
298 return data.error;
299
300 return 0;
301}
302
303static int mmc_spi_send_cxd(struct mmc_host *host, u32 *cxd, u32 opcode)
304{
305 int ret, i;
306 __be32 *cxd_tmp;
307
308 cxd_tmp = kzalloc(16, GFP_KERNEL);
309 if (!cxd_tmp)
310 return -ENOMEM;
311
312 ret = mmc_send_adtc_data(NULL, host, opcode, 0, cxd_tmp, 16);
313 if (ret)
314 goto err;
315
316 for (i = 0; i < 4; i++)
317 cxd[i] = be32_to_cpu(cxd_tmp[i]);
318
319err:
320 kfree(cxd_tmp);
321 return ret;
322}
323
324int mmc_send_csd(struct mmc_card *card, u32 *csd)
325{
326 if (mmc_host_is_spi(card->host))
327 return mmc_spi_send_cxd(card->host, csd, MMC_SEND_CSD);
328
329 return mmc_send_cxd_native(card->host, card->rca << 16, csd,
330 MMC_SEND_CSD);
331}
332
333int mmc_send_cid(struct mmc_host *host, u32 *cid)
334{
335 if (mmc_host_is_spi(host))
336 return mmc_spi_send_cxd(host, cid, MMC_SEND_CID);
337
338 return mmc_send_cxd_native(host, 0, cid, MMC_ALL_SEND_CID);
339}
340
341int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
342{
343 int err;
344 u8 *ext_csd;
345
346 if (!card || !new_ext_csd)
347 return -EINVAL;
348
349 if (!mmc_can_ext_csd(card))
350 return -EOPNOTSUPP;
351
352 /*
353 * As the ext_csd is so large and mostly unused, we don't store the
354 * raw block in mmc_card.
355 */
356 ext_csd = kzalloc(512, GFP_KERNEL);
357 if (!ext_csd)
358 return -ENOMEM;
359
360 err = mmc_send_adtc_data(card, card->host, MMC_SEND_EXT_CSD, 0, ext_csd,
361 512);
362 if (err)
363 kfree(ext_csd);
364 else
365 *new_ext_csd = ext_csd;
366
367 return err;
368}
369EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
370
371int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
372{
373 struct mmc_command cmd = {};
374 int err;
375
376 cmd.opcode = MMC_SPI_READ_OCR;
377 cmd.arg = highcap ? (1 << 30) : 0;
378 cmd.flags = MMC_RSP_SPI_R3;
379
380 err = mmc_wait_for_cmd(host, &cmd, 0);
381
382 *ocrp = cmd.resp[1];
383 return err;
384}
385
386int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
387{
388 struct mmc_command cmd = {};
389 int err;
390
391 cmd.opcode = MMC_SPI_CRC_ON_OFF;
392 cmd.flags = MMC_RSP_SPI_R1;
393 cmd.arg = use_crc;
394
395 err = mmc_wait_for_cmd(host, &cmd, 0);
396 if (!err)
397 host->use_spi_crc = use_crc;
398 return err;
399}
400
401static int mmc_switch_status_error(struct mmc_host *host, u32 status)
402{
403 if (mmc_host_is_spi(host)) {
404 if (status & R1_SPI_ILLEGAL_COMMAND)
405 return -EBADMSG;
406 } else {
407 if (R1_STATUS(status))
408 pr_warn("%s: unexpected status %#x after switch\n",
409 mmc_hostname(host), status);
410 if (status & R1_SWITCH_ERROR)
411 return -EBADMSG;
412 }
413 return 0;
414}
415
416/* Caller must hold re-tuning */
417int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
418{
419 u32 status;
420 int err;
421
422 err = mmc_send_status(card, &status);
423 if (!crc_err_fatal && err == -EILSEQ)
424 return 0;
425 if (err)
426 return err;
427
428 return mmc_switch_status_error(card->host, status);
429}
430
431static int mmc_busy_cb(void *cb_data, bool *busy)
432{
433 struct mmc_busy_data *data = cb_data;
434 struct mmc_host *host = data->card->host;
435 u32 status = 0;
436 int err;
437
438 if (data->busy_cmd != MMC_BUSY_IO && host->ops->card_busy) {
439 *busy = host->ops->card_busy(host);
440 return 0;
441 }
442
443 err = mmc_send_status(data->card, &status);
444 if (data->retry_crc_err && err == -EILSEQ) {
445 *busy = true;
446 return 0;
447 }
448 if (err)
449 return err;
450
451 switch (data->busy_cmd) {
452 case MMC_BUSY_CMD6:
453 err = mmc_switch_status_error(host, status);
454 break;
455 case MMC_BUSY_ERASE:
456 err = R1_STATUS(status) ? -EIO : 0;
457 break;
458 case MMC_BUSY_HPI:
459 case MMC_BUSY_EXTR_SINGLE:
460 case MMC_BUSY_IO:
461 break;
462 default:
463 err = -EINVAL;
464 }
465
466 if (err)
467 return err;
468
469 *busy = !mmc_ready_for_data(status);
470 return 0;
471}
472
473int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
474 int (*busy_cb)(void *cb_data, bool *busy),
475 void *cb_data)
476{
477 struct mmc_host *host = card->host;
478 int err;
479 unsigned long timeout;
480 unsigned int udelay = 32, udelay_max = 32768;
481 bool expired = false;
482 bool busy = false;
483
484 timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
485 do {
486 /*
487 * Due to the possibility of being preempted while polling,
488 * check the expiration time first.
489 */
490 expired = time_after(jiffies, timeout);
491
492 err = (*busy_cb)(cb_data, &busy);
493 if (err)
494 return err;
495
496 /* Timeout if the device still remains busy. */
497 if (expired && busy) {
498 pr_err("%s: Card stuck being busy! %s\n",
499 mmc_hostname(host), __func__);
500 return -ETIMEDOUT;
501 }
502
503 /* Throttle the polling rate to avoid hogging the CPU. */
504 if (busy) {
505 usleep_range(udelay, udelay * 2);
506 if (udelay < udelay_max)
507 udelay *= 2;
508 }
509 } while (busy);
510
511 return 0;
512}
513EXPORT_SYMBOL_GPL(__mmc_poll_for_busy);
514
515int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
516 bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
517{
518 struct mmc_busy_data cb_data;
519
520 cb_data.card = card;
521 cb_data.retry_crc_err = retry_crc_err;
522 cb_data.busy_cmd = busy_cmd;
523
524 return __mmc_poll_for_busy(card, timeout_ms, &mmc_busy_cb, &cb_data);
525}
526EXPORT_SYMBOL_GPL(mmc_poll_for_busy);
527
528bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
529 unsigned int timeout_ms)
530{
531 /*
532 * If the max_busy_timeout of the host is specified, make sure it's
533 * enough to fit the used timeout_ms. In case it's not, let's instruct
534 * the host to avoid HW busy detection, by converting to a R1 response
535 * instead of a R1B. Note, some hosts requires R1B, which also means
536 * they are on their own when it comes to deal with the busy timeout.
537 */
538 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
539 (timeout_ms > host->max_busy_timeout)) {
540 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1 | MMC_RSP_R1;
541 return false;
542 }
543
544 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1B | MMC_RSP_R1B;
545 cmd->busy_timeout = timeout_ms;
546 return true;
547}
548
549/**
550 * __mmc_switch - modify EXT_CSD register
551 * @card: the MMC card associated with the data transfer
552 * @set: cmd set values
553 * @index: EXT_CSD register index
554 * @value: value to program into EXT_CSD register
555 * @timeout_ms: timeout (ms) for operation performed by register write,
556 * timeout of zero implies maximum possible timeout
557 * @timing: new timing to change to
558 * @send_status: send status cmd to poll for busy
559 * @retry_crc_err: retry when CRC errors when polling with CMD13 for busy
560 * @retries: number of retries
561 *
562 * Modifies the EXT_CSD register for selected card.
563 */
564int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
565 unsigned int timeout_ms, unsigned char timing,
566 bool send_status, bool retry_crc_err, unsigned int retries)
567{
568 struct mmc_host *host = card->host;
569 int err;
570 struct mmc_command cmd = {};
571 bool use_r1b_resp;
572 unsigned char old_timing = host->ios.timing;
573
574 mmc_retune_hold(host);
575
576 if (!timeout_ms) {
577 pr_warn("%s: unspecified timeout for CMD6 - use generic\n",
578 mmc_hostname(host));
579 timeout_ms = card->ext_csd.generic_cmd6_time;
580 }
581
582 cmd.opcode = MMC_SWITCH;
583 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
584 (index << 16) |
585 (value << 8) |
586 set;
587 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
588
589 err = mmc_wait_for_cmd(host, &cmd, retries);
590 if (err)
591 goto out;
592
593 /*If SPI or used HW busy detection above, then we don't need to poll. */
594 if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
595 mmc_host_is_spi(host))
596 goto out_tim;
597
598 /*
599 * If the host doesn't support HW polling via the ->card_busy() ops and
600 * when it's not allowed to poll by using CMD13, then we need to rely on
601 * waiting the stated timeout to be sufficient.
602 */
603 if (!send_status && !host->ops->card_busy) {
604 mmc_delay(timeout_ms);
605 goto out_tim;
606 }
607
608 /* Let's try to poll to find out when the command is completed. */
609 err = mmc_poll_for_busy(card, timeout_ms, retry_crc_err, MMC_BUSY_CMD6);
610 if (err)
611 goto out;
612
613out_tim:
614 /* Switch to new timing before check switch status. */
615 if (timing)
616 mmc_set_timing(host, timing);
617
618 if (send_status) {
619 err = mmc_switch_status(card, true);
620 if (err && timing)
621 mmc_set_timing(host, old_timing);
622 }
623out:
624 mmc_retune_release(host);
625
626 return err;
627}
628
629int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
630 unsigned int timeout_ms)
631{
632 return __mmc_switch(card, set, index, value, timeout_ms, 0,
633 true, false, MMC_CMD_RETRIES);
634}
635EXPORT_SYMBOL_GPL(mmc_switch);
636
637int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
638{
639 struct mmc_request mrq = {};
640 struct mmc_command cmd = {};
641 struct mmc_data data = {};
642 struct scatterlist sg;
643 struct mmc_ios *ios = &host->ios;
644 const u8 *tuning_block_pattern;
645 int size, err = 0;
646 u8 *data_buf;
647
648 if (ios->bus_width == MMC_BUS_WIDTH_8) {
649 tuning_block_pattern = tuning_blk_pattern_8bit;
650 size = sizeof(tuning_blk_pattern_8bit);
651 } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
652 tuning_block_pattern = tuning_blk_pattern_4bit;
653 size = sizeof(tuning_blk_pattern_4bit);
654 } else
655 return -EINVAL;
656
657 data_buf = kzalloc(size, GFP_KERNEL);
658 if (!data_buf)
659 return -ENOMEM;
660
661 mrq.cmd = &cmd;
662 mrq.data = &data;
663
664 cmd.opcode = opcode;
665 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
666
667 data.blksz = size;
668 data.blocks = 1;
669 data.flags = MMC_DATA_READ;
670
671 /*
672 * According to the tuning specs, Tuning process
673 * is normally shorter 40 executions of CMD19,
674 * and timeout value should be shorter than 150 ms
675 */
676 data.timeout_ns = 150 * NSEC_PER_MSEC;
677
678 data.sg = &sg;
679 data.sg_len = 1;
680 sg_init_one(&sg, data_buf, size);
681
682 mmc_wait_for_req(host, &mrq);
683
684 if (cmd_error)
685 *cmd_error = cmd.error;
686
687 if (cmd.error) {
688 err = cmd.error;
689 goto out;
690 }
691
692 if (data.error) {
693 err = data.error;
694 goto out;
695 }
696
697 if (memcmp(data_buf, tuning_block_pattern, size))
698 err = -EIO;
699
700out:
701 kfree(data_buf);
702 return err;
703}
704EXPORT_SYMBOL_GPL(mmc_send_tuning);
705
706int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode)
707{
708 struct mmc_command cmd = {};
709
710 /*
711 * eMMC specification specifies that CMD12 can be used to stop a tuning
712 * command, but SD specification does not, so do nothing unless it is
713 * eMMC.
714 */
715 if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
716 return 0;
717
718 cmd.opcode = MMC_STOP_TRANSMISSION;
719 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
720
721 /*
722 * For drivers that override R1 to R1b, set an arbitrary timeout based
723 * on the tuning timeout i.e. 150ms.
724 */
725 cmd.busy_timeout = 150;
726
727 return mmc_wait_for_cmd(host, &cmd, 0);
728}
729EXPORT_SYMBOL_GPL(mmc_send_abort_tuning);
730
731static int
732mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
733 u8 len)
734{
735 struct mmc_request mrq = {};
736 struct mmc_command cmd = {};
737 struct mmc_data data = {};
738 struct scatterlist sg;
739 u8 *data_buf;
740 u8 *test_buf;
741 int i, err;
742 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
743 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
744
745 /* dma onto stack is unsafe/nonportable, but callers to this
746 * routine normally provide temporary on-stack buffers ...
747 */
748 data_buf = kmalloc(len, GFP_KERNEL);
749 if (!data_buf)
750 return -ENOMEM;
751
752 if (len == 8)
753 test_buf = testdata_8bit;
754 else if (len == 4)
755 test_buf = testdata_4bit;
756 else {
757 pr_err("%s: Invalid bus_width %d\n",
758 mmc_hostname(host), len);
759 kfree(data_buf);
760 return -EINVAL;
761 }
762
763 if (opcode == MMC_BUS_TEST_W)
764 memcpy(data_buf, test_buf, len);
765
766 mrq.cmd = &cmd;
767 mrq.data = &data;
768 cmd.opcode = opcode;
769 cmd.arg = 0;
770
771 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
772 * rely on callers to never use this with "native" calls for reading
773 * CSD or CID. Native versions of those commands use the R2 type,
774 * not R1 plus a data block.
775 */
776 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
777
778 data.blksz = len;
779 data.blocks = 1;
780 if (opcode == MMC_BUS_TEST_R)
781 data.flags = MMC_DATA_READ;
782 else
783 data.flags = MMC_DATA_WRITE;
784
785 data.sg = &sg;
786 data.sg_len = 1;
787 mmc_set_data_timeout(&data, card);
788 sg_init_one(&sg, data_buf, len);
789 mmc_wait_for_req(host, &mrq);
790 err = 0;
791 if (opcode == MMC_BUS_TEST_R) {
792 for (i = 0; i < len / 4; i++)
793 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
794 err = -EIO;
795 break;
796 }
797 }
798 kfree(data_buf);
799
800 if (cmd.error)
801 return cmd.error;
802 if (data.error)
803 return data.error;
804
805 return err;
806}
807
808int mmc_bus_test(struct mmc_card *card, u8 bus_width)
809{
810 int width;
811
812 if (bus_width == MMC_BUS_WIDTH_8)
813 width = 8;
814 else if (bus_width == MMC_BUS_WIDTH_4)
815 width = 4;
816 else if (bus_width == MMC_BUS_WIDTH_1)
817 return 0; /* no need for test */
818 else
819 return -EINVAL;
820
821 /*
822 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
823 * is a problem. This improves chances that the test will work.
824 */
825 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
826 return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
827}
828
829static int mmc_send_hpi_cmd(struct mmc_card *card)
830{
831 unsigned int busy_timeout_ms = card->ext_csd.out_of_int_time;
832 struct mmc_host *host = card->host;
833 bool use_r1b_resp = false;
834 struct mmc_command cmd = {};
835 int err;
836
837 cmd.opcode = card->ext_csd.hpi_cmd;
838 cmd.arg = card->rca << 16 | 1;
839 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
840
841 if (cmd.opcode == MMC_STOP_TRANSMISSION)
842 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd,
843 busy_timeout_ms);
844
845 err = mmc_wait_for_cmd(host, &cmd, 0);
846 if (err) {
847 pr_warn("%s: HPI error %d. Command response %#x\n",
848 mmc_hostname(host), err, cmd.resp[0]);
849 return err;
850 }
851
852 /* No need to poll when using HW busy detection. */
853 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
854 return 0;
855
856 /* Let's poll to find out when the HPI request completes. */
857 return mmc_poll_for_busy(card, busy_timeout_ms, false, MMC_BUSY_HPI);
858}
859
860/**
861 * mmc_interrupt_hpi - Issue for High priority Interrupt
862 * @card: the MMC card associated with the HPI transfer
863 *
864 * Issued High Priority Interrupt, and check for card status
865 * until out-of prg-state.
866 */
867static int mmc_interrupt_hpi(struct mmc_card *card)
868{
869 int err;
870 u32 status;
871
872 if (!card->ext_csd.hpi_en) {
873 pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
874 return 1;
875 }
876
877 err = mmc_send_status(card, &status);
878 if (err) {
879 pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
880 goto out;
881 }
882
883 switch (R1_CURRENT_STATE(status)) {
884 case R1_STATE_IDLE:
885 case R1_STATE_READY:
886 case R1_STATE_STBY:
887 case R1_STATE_TRAN:
888 /*
889 * In idle and transfer states, HPI is not needed and the caller
890 * can issue the next intended command immediately
891 */
892 goto out;
893 case R1_STATE_PRG:
894 break;
895 default:
896 /* In all other states, it's illegal to issue HPI */
897 pr_debug("%s: HPI cannot be sent. Card state=%d\n",
898 mmc_hostname(card->host), R1_CURRENT_STATE(status));
899 err = -EINVAL;
900 goto out;
901 }
902
903 err = mmc_send_hpi_cmd(card);
904out:
905 return err;
906}
907
908int mmc_can_ext_csd(struct mmc_card *card)
909{
910 return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
911}
912
913static int mmc_read_bkops_status(struct mmc_card *card)
914{
915 int err;
916 u8 *ext_csd;
917
918 err = mmc_get_ext_csd(card, &ext_csd);
919 if (err)
920 return err;
921
922 card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
923 card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
924 kfree(ext_csd);
925 return 0;
926}
927
928/**
929 * mmc_run_bkops - Run BKOPS for supported cards
930 * @card: MMC card to run BKOPS for
931 *
932 * Run background operations synchronously for cards having manual BKOPS
933 * enabled and in case it reports urgent BKOPS level.
934*/
935void mmc_run_bkops(struct mmc_card *card)
936{
937 int err;
938
939 if (!card->ext_csd.man_bkops_en)
940 return;
941
942 err = mmc_read_bkops_status(card);
943 if (err) {
944 pr_err("%s: Failed to read bkops status: %d\n",
945 mmc_hostname(card->host), err);
946 return;
947 }
948
949 if (!card->ext_csd.raw_bkops_status ||
950 card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
951 return;
952
953 mmc_retune_hold(card->host);
954
955 /*
956 * For urgent BKOPS status, LEVEL_2 and higher, let's execute
957 * synchronously. Future wise, we may consider to start BKOPS, for less
958 * urgent levels by using an asynchronous background task, when idle.
959 */
960 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
961 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
962 if (err)
963 pr_warn("%s: Error %d starting bkops\n",
964 mmc_hostname(card->host), err);
965
966 mmc_retune_release(card->host);
967}
968EXPORT_SYMBOL(mmc_run_bkops);
969
970static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
971{
972 u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
973 int err;
974
975 if (!card->ext_csd.cmdq_support)
976 return -EOPNOTSUPP;
977
978 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
979 val, card->ext_csd.generic_cmd6_time);
980 if (!err)
981 card->ext_csd.cmdq_en = enable;
982
983 return err;
984}
985
986int mmc_cmdq_enable(struct mmc_card *card)
987{
988 return mmc_cmdq_switch(card, true);
989}
990EXPORT_SYMBOL_GPL(mmc_cmdq_enable);
991
992int mmc_cmdq_disable(struct mmc_card *card)
993{
994 return mmc_cmdq_switch(card, false);
995}
996EXPORT_SYMBOL_GPL(mmc_cmdq_disable);
997
998int mmc_sanitize(struct mmc_card *card, unsigned int timeout_ms)
999{
1000 struct mmc_host *host = card->host;
1001 int err;
1002
1003 if (!mmc_can_sanitize(card)) {
1004 pr_warn("%s: Sanitize not supported\n", mmc_hostname(host));
1005 return -EOPNOTSUPP;
1006 }
1007
1008 if (!timeout_ms)
1009 timeout_ms = MMC_SANITIZE_TIMEOUT_MS;
1010
1011 pr_debug("%s: Sanitize in progress...\n", mmc_hostname(host));
1012
1013 mmc_retune_hold(host);
1014
1015 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_SANITIZE_START,
1016 1, timeout_ms, 0, true, false, 0);
1017 if (err)
1018 pr_err("%s: Sanitize failed err=%d\n", mmc_hostname(host), err);
1019
1020 /*
1021 * If the sanitize operation timed out, the card is probably still busy
1022 * in the R1_STATE_PRG. Rather than continue to wait, let's try to abort
1023 * it with a HPI command to get back into R1_STATE_TRAN.
1024 */
1025 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
1026 pr_warn("%s: Sanitize aborted\n", mmc_hostname(host));
1027
1028 mmc_retune_release(host);
1029
1030 pr_debug("%s: Sanitize completed\n", mmc_hostname(host));
1031 return err;
1032}
1033EXPORT_SYMBOL_GPL(mmc_sanitize);