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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>
21#include <linux/leds.h>
22#include <linux/scatterlist.h>
23#include <linux/log2.h>
24#include <linux/regulator/consumer.h>
25#include <linux/pm_runtime.h>
26#include <linux/pm_wakeup.h>
27#include <linux/suspend.h>
28#include <linux/fault-inject.h>
29#include <linux/random.h>
30#include <linux/slab.h>
31#include <linux/of.h>
32
33#include <linux/mmc/card.h>
34#include <linux/mmc/host.h>
35#include <linux/mmc/mmc.h>
36#include <linux/mmc/sd.h>
37#include <linux/mmc/slot-gpio.h>
38
39#include "core.h"
40#include "bus.h"
41#include "host.h"
42#include "sdio_bus.h"
43#include "pwrseq.h"
44
45#include "mmc_ops.h"
46#include "sd_ops.h"
47#include "sdio_ops.h"
48
49
50#define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000)
51
52
53
54
55
56#define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000)
57
58static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
59
60
61
62
63
64
65bool use_spi_crc = 1;
66module_param(use_spi_crc, bool, 0);
67
68static int mmc_schedule_delayed_work(struct delayed_work *work,
69 unsigned long delay)
70{
71
72
73
74
75
76
77 return queue_delayed_work(system_freezable_wq, work, delay);
78}
79
80#ifdef CONFIG_FAIL_MMC_REQUEST
81
82
83
84
85
86static void mmc_should_fail_request(struct mmc_host *host,
87 struct mmc_request *mrq)
88{
89 struct mmc_command *cmd = mrq->cmd;
90 struct mmc_data *data = mrq->data;
91 static const int data_errors[] = {
92 -ETIMEDOUT,
93 -EILSEQ,
94 -EIO,
95 };
96
97 if (!data)
98 return;
99
100 if (cmd->error || data->error ||
101 !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
102 return;
103
104 data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)];
105 data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9;
106}
107
108#else
109
110static inline void mmc_should_fail_request(struct mmc_host *host,
111 struct mmc_request *mrq)
112{
113}
114
115#endif
116
117
118
119
120
121
122
123
124
125void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
126{
127 struct mmc_command *cmd = mrq->cmd;
128 int err = cmd->error;
129
130
131 if ((cmd->opcode != MMC_SEND_TUNING_BLOCK &&
132 cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
133 (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
134 (mrq->data && mrq->data->error == -EILSEQ) ||
135 (mrq->stop && mrq->stop->error == -EILSEQ)))
136 mmc_retune_needed(host);
137
138 if (err && cmd->retries && mmc_host_is_spi(host)) {
139 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
140 cmd->retries = 0;
141 }
142
143 if (err && cmd->retries && !mmc_card_removed(host->card)) {
144
145
146
147
148 if (mrq->done)
149 mrq->done(mrq);
150 } else {
151 mmc_should_fail_request(host, mrq);
152
153 led_trigger_event(host->led, LED_OFF);
154
155 if (mrq->sbc) {
156 pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n",
157 mmc_hostname(host), mrq->sbc->opcode,
158 mrq->sbc->error,
159 mrq->sbc->resp[0], mrq->sbc->resp[1],
160 mrq->sbc->resp[2], mrq->sbc->resp[3]);
161 }
162
163 pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
164 mmc_hostname(host), cmd->opcode, err,
165 cmd->resp[0], cmd->resp[1],
166 cmd->resp[2], cmd->resp[3]);
167
168 if (mrq->data) {
169 pr_debug("%s: %d bytes transferred: %d\n",
170 mmc_hostname(host),
171 mrq->data->bytes_xfered, mrq->data->error);
172 }
173
174 if (mrq->stop) {
175 pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n",
176 mmc_hostname(host), mrq->stop->opcode,
177 mrq->stop->error,
178 mrq->stop->resp[0], mrq->stop->resp[1],
179 mrq->stop->resp[2], mrq->stop->resp[3]);
180 }
181
182 if (mrq->done)
183 mrq->done(mrq);
184 }
185}
186
187EXPORT_SYMBOL(mmc_request_done);
188
189static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
190{
191 int err;
192
193
194 err = mmc_retune(host);
195 if (err) {
196 mrq->cmd->error = err;
197 mmc_request_done(host, mrq);
198 return;
199 }
200
201
202
203
204
205 if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) {
206 int tries = 500;
207
208 while (host->ops->card_busy(host) && --tries)
209 mmc_delay(1);
210
211 if (tries == 0) {
212 mrq->cmd->error = -EBUSY;
213 mmc_request_done(host, mrq);
214 return;
215 }
216 }
217
218 host->ops->request(host, mrq);
219}
220
221static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
222{
223#ifdef CONFIG_MMC_DEBUG
224 unsigned int i, sz;
225 struct scatterlist *sg;
226#endif
227 mmc_retune_hold(host);
228
229 if (mmc_card_removed(host->card))
230 return -ENOMEDIUM;
231
232 if (mrq->sbc) {
233 pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n",
234 mmc_hostname(host), mrq->sbc->opcode,
235 mrq->sbc->arg, mrq->sbc->flags);
236 }
237
238 pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
239 mmc_hostname(host), mrq->cmd->opcode,
240 mrq->cmd->arg, mrq->cmd->flags);
241
242 if (mrq->data) {
243 pr_debug("%s: blksz %d blocks %d flags %08x "
244 "tsac %d ms nsac %d\n",
245 mmc_hostname(host), mrq->data->blksz,
246 mrq->data->blocks, mrq->data->flags,
247 mrq->data->timeout_ns / 1000000,
248 mrq->data->timeout_clks);
249 }
250
251 if (mrq->stop) {
252 pr_debug("%s: CMD%u arg %08x flags %08x\n",
253 mmc_hostname(host), mrq->stop->opcode,
254 mrq->stop->arg, mrq->stop->flags);
255 }
256
257 WARN_ON(!host->claimed);
258
259 mrq->cmd->error = 0;
260 mrq->cmd->mrq = mrq;
261 if (mrq->sbc) {
262 mrq->sbc->error = 0;
263 mrq->sbc->mrq = mrq;
264 }
265 if (mrq->data) {
266 BUG_ON(mrq->data->blksz > host->max_blk_size);
267 BUG_ON(mrq->data->blocks > host->max_blk_count);
268 BUG_ON(mrq->data->blocks * mrq->data->blksz >
269 host->max_req_size);
270
271#ifdef CONFIG_MMC_DEBUG
272 sz = 0;
273 for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i)
274 sz += sg->length;
275 BUG_ON(sz != mrq->data->blocks * mrq->data->blksz);
276#endif
277
278 mrq->cmd->data = mrq->data;
279 mrq->data->error = 0;
280 mrq->data->mrq = mrq;
281 if (mrq->stop) {
282 mrq->data->stop = mrq->stop;
283 mrq->stop->error = 0;
284 mrq->stop->mrq = mrq;
285 }
286 }
287 led_trigger_event(host->led, LED_FULL);
288 __mmc_start_request(host, mrq);
289
290 return 0;
291}
292
293
294
295
296
297
298
299
300
301
302
303void mmc_start_bkops(struct mmc_card *card, bool from_exception)
304{
305 int err;
306 int timeout;
307 bool use_busy_signal;
308
309 BUG_ON(!card);
310
311 if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card))
312 return;
313
314 err = mmc_read_bkops_status(card);
315 if (err) {
316 pr_err("%s: Failed to read bkops status: %d\n",
317 mmc_hostname(card->host), err);
318 return;
319 }
320
321 if (!card->ext_csd.raw_bkops_status)
322 return;
323
324 if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 &&
325 from_exception)
326 return;
327
328 mmc_claim_host(card->host);
329 if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) {
330 timeout = MMC_BKOPS_MAX_TIMEOUT;
331 use_busy_signal = true;
332 } else {
333 timeout = 0;
334 use_busy_signal = false;
335 }
336
337 mmc_retune_hold(card->host);
338
339 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
340 EXT_CSD_BKOPS_START, 1, timeout,
341 use_busy_signal, true, false);
342 if (err) {
343 pr_warn("%s: Error %d starting bkops\n",
344 mmc_hostname(card->host), err);
345 mmc_retune_release(card->host);
346 goto out;
347 }
348
349
350
351
352
353
354 if (!use_busy_signal)
355 mmc_card_set_doing_bkops(card);
356 else
357 mmc_retune_release(card->host);
358out:
359 mmc_release_host(card->host);
360}
361EXPORT_SYMBOL(mmc_start_bkops);
362
363
364
365
366
367
368
369static void mmc_wait_data_done(struct mmc_request *mrq)
370{
371 struct mmc_context_info *context_info = &mrq->host->context_info;
372
373 context_info->is_done_rcv = true;
374 wake_up_interruptible(&context_info->wait);
375}
376
377static void mmc_wait_done(struct mmc_request *mrq)
378{
379 complete(&mrq->completion);
380}
381
382
383
384
385
386
387
388
389
390static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq)
391{
392 int err;
393
394 mrq->done = mmc_wait_data_done;
395 mrq->host = host;
396
397 err = mmc_start_request(host, mrq);
398 if (err) {
399 mrq->cmd->error = err;
400 mmc_wait_data_done(mrq);
401 }
402
403 return err;
404}
405
406static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
407{
408 int err;
409
410 init_completion(&mrq->completion);
411 mrq->done = mmc_wait_done;
412
413 err = mmc_start_request(host, mrq);
414 if (err) {
415 mrq->cmd->error = err;
416 complete(&mrq->completion);
417 }
418
419 return err;
420}
421
422
423
424
425
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427
428
429
430
431
432
433static int mmc_wait_for_data_req_done(struct mmc_host *host,
434 struct mmc_request *mrq,
435 struct mmc_async_req *next_req)
436{
437 struct mmc_command *cmd;
438 struct mmc_context_info *context_info = &host->context_info;
439 int err;
440 unsigned long flags;
441
442 while (1) {
443 wait_event_interruptible(context_info->wait,
444 (context_info->is_done_rcv ||
445 context_info->is_new_req));
446 spin_lock_irqsave(&context_info->lock, flags);
447 context_info->is_waiting_last_req = false;
448 spin_unlock_irqrestore(&context_info->lock, flags);
449 if (context_info->is_done_rcv) {
450 context_info->is_done_rcv = false;
451 context_info->is_new_req = false;
452 cmd = mrq->cmd;
453
454 if (!cmd->error || !cmd->retries ||
455 mmc_card_removed(host->card)) {
456 err = host->areq->err_check(host->card,
457 host->areq);
458 break;
459 } else {
460 mmc_retune_recheck(host);
461 pr_info("%s: req failed (CMD%u): %d, retrying...\n",
462 mmc_hostname(host),
463 cmd->opcode, cmd->error);
464 cmd->retries--;
465 cmd->error = 0;
466 __mmc_start_request(host, mrq);
467 continue;
468 }
469 } else if (context_info->is_new_req) {
470 context_info->is_new_req = false;
471 if (!next_req)
472 return MMC_BLK_NEW_REQUEST;
473 }
474 }
475 mmc_retune_release(host);
476 return err;
477}
478
479static void mmc_wait_for_req_done(struct mmc_host *host,
480 struct mmc_request *mrq)
481{
482 struct mmc_command *cmd;
483
484 while (1) {
485 wait_for_completion(&mrq->completion);
486
487 cmd = mrq->cmd;
488
489
490
491
492
493
494
495 if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
496 if (!mmc_interrupt_hpi(host->card)) {
497 pr_warn("%s: %s: Interrupted sanitize\n",
498 mmc_hostname(host), __func__);
499 cmd->error = 0;
500 break;
501 } else {
502 pr_err("%s: %s: Failed to interrupt sanitize\n",
503 mmc_hostname(host), __func__);
504 }
505 }
506 if (!cmd->error || !cmd->retries ||
507 mmc_card_removed(host->card))
508 break;
509
510 mmc_retune_recheck(host);
511
512 pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
513 mmc_hostname(host), cmd->opcode, cmd->error);
514 cmd->retries--;
515 cmd->error = 0;
516 __mmc_start_request(host, mrq);
517 }
518
519 mmc_retune_release(host);
520}
521
522
523
524
525
526
527
528
529
530
531
532
533static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
534 bool is_first_req)
535{
536 if (host->ops->pre_req)
537 host->ops->pre_req(host, mrq, is_first_req);
538}
539
540
541
542
543
544
545
546
547
548
549static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
550 int err)
551{
552 if (host->ops->post_req)
553 host->ops->post_req(host, mrq, err);
554}
555
556
557
558
559
560
561
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564
565
566
567
568
569
570
571
572struct mmc_async_req *mmc_start_req(struct mmc_host *host,
573 struct mmc_async_req *areq, int *error)
574{
575 int err = 0;
576 int start_err = 0;
577 struct mmc_async_req *data = host->areq;
578
579
580 if (areq)
581 mmc_pre_req(host, areq->mrq, !host->areq);
582
583 if (host->areq) {
584 err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq);
585 if (err == MMC_BLK_NEW_REQUEST) {
586 if (error)
587 *error = err;
588
589
590
591
592 return NULL;
593 }
594
595
596
597 if (host->card && mmc_card_mmc(host->card) &&
598 ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) ||
599 (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) &&
600 (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) {
601
602
603 if (areq)
604 mmc_post_req(host, areq->mrq, -EINVAL);
605
606 mmc_start_bkops(host->card, true);
607
608
609 if (areq)
610 mmc_pre_req(host, areq->mrq, !host->areq);
611 }
612 }
613
614 if (!err && areq)
615 start_err = __mmc_start_data_req(host, areq->mrq);
616
617 if (host->areq)
618 mmc_post_req(host, host->areq->mrq, 0);
619
620
621 if ((err || start_err) && areq)
622 mmc_post_req(host, areq->mrq, -EINVAL);
623
624 if (err)
625 host->areq = NULL;
626 else
627 host->areq = areq;
628
629 if (error)
630 *error = err;
631 return data;
632}
633EXPORT_SYMBOL(mmc_start_req);
634
635
636
637
638
639
640
641
642
643
644void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
645{
646 __mmc_start_req(host, mrq);
647 mmc_wait_for_req_done(host, mrq);
648}
649EXPORT_SYMBOL(mmc_wait_for_req);
650
651
652
653
654
655
656
657
658int mmc_interrupt_hpi(struct mmc_card *card)
659{
660 int err;
661 u32 status;
662 unsigned long prg_wait;
663
664 BUG_ON(!card);
665
666 if (!card->ext_csd.hpi_en) {
667 pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
668 return 1;
669 }
670
671 mmc_claim_host(card->host);
672 err = mmc_send_status(card, &status);
673 if (err) {
674 pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
675 goto out;
676 }
677
678 switch (R1_CURRENT_STATE(status)) {
679 case R1_STATE_IDLE:
680 case R1_STATE_READY:
681 case R1_STATE_STBY:
682 case R1_STATE_TRAN:
683
684
685
686
687 goto out;
688 case R1_STATE_PRG:
689 break;
690 default:
691
692 pr_debug("%s: HPI cannot be sent. Card state=%d\n",
693 mmc_hostname(card->host), R1_CURRENT_STATE(status));
694 err = -EINVAL;
695 goto out;
696 }
697
698 err = mmc_send_hpi_cmd(card, &status);
699 if (err)
700 goto out;
701
702 prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time);
703 do {
704 err = mmc_send_status(card, &status);
705
706 if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN)
707 break;
708 if (time_after(jiffies, prg_wait))
709 err = -ETIMEDOUT;
710 } while (!err);
711
712out:
713 mmc_release_host(card->host);
714 return err;
715}
716EXPORT_SYMBOL(mmc_interrupt_hpi);
717
718
719
720
721
722
723
724
725
726
727
728int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
729{
730 struct mmc_request mrq = {NULL};
731
732 WARN_ON(!host->claimed);
733
734 memset(cmd->resp, 0, sizeof(cmd->resp));
735 cmd->retries = retries;
736
737 mrq.cmd = cmd;
738 cmd->data = NULL;
739
740 mmc_wait_for_req(host, &mrq);
741
742 return cmd->error;
743}
744
745EXPORT_SYMBOL(mmc_wait_for_cmd);
746
747
748
749
750
751
752
753
754
755
756int mmc_stop_bkops(struct mmc_card *card)
757{
758 int err = 0;
759
760 BUG_ON(!card);
761 err = mmc_interrupt_hpi(card);
762
763
764
765
766
767 if (!err || (err == -EINVAL)) {
768 mmc_card_clr_doing_bkops(card);
769 mmc_retune_release(card->host);
770 err = 0;
771 }
772
773 return err;
774}
775EXPORT_SYMBOL(mmc_stop_bkops);
776
777int mmc_read_bkops_status(struct mmc_card *card)
778{
779 int err;
780 u8 *ext_csd;
781
782 mmc_claim_host(card->host);
783 err = mmc_get_ext_csd(card, &ext_csd);
784 mmc_release_host(card->host);
785 if (err)
786 return err;
787
788 card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
789 card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
790 kfree(ext_csd);
791 return 0;
792}
793EXPORT_SYMBOL(mmc_read_bkops_status);
794
795
796
797
798
799
800
801
802
803void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
804{
805 unsigned int mult;
806
807
808
809
810 if (mmc_card_sdio(card)) {
811 data->timeout_ns = 1000000000;
812 data->timeout_clks = 0;
813 return;
814 }
815
816
817
818
819 mult = mmc_card_sd(card) ? 100 : 10;
820
821
822
823
824
825 if (data->flags & MMC_DATA_WRITE)
826 mult <<= card->csd.r2w_factor;
827
828 data->timeout_ns = card->csd.tacc_ns * mult;
829 data->timeout_clks = card->csd.tacc_clks * mult;
830
831
832
833
834 if (mmc_card_sd(card)) {
835 unsigned int timeout_us, limit_us;
836
837 timeout_us = data->timeout_ns / 1000;
838 if (card->host->ios.clock)
839 timeout_us += data->timeout_clks * 1000 /
840 (card->host->ios.clock / 1000);
841
842 if (data->flags & MMC_DATA_WRITE)
843
844
845
846
847
848
849
850
851 limit_us = 3000000;
852 else
853 limit_us = 100000;
854
855
856
857
858 if (timeout_us > limit_us || mmc_card_blockaddr(card)) {
859 data->timeout_ns = limit_us * 1000;
860 data->timeout_clks = 0;
861 }
862
863
864 if (timeout_us == 0)
865 data->timeout_ns = limit_us * 1000;
866 }
867
868
869
870
871
872
873
874 if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
875 data->timeout_ns = 300000000;
876 data->timeout_clks = 0;
877 }
878
879
880
881
882
883
884
885 if (mmc_host_is_spi(card->host)) {
886 if (data->flags & MMC_DATA_WRITE) {
887 if (data->timeout_ns < 1000000000)
888 data->timeout_ns = 1000000000;
889 } else {
890 if (data->timeout_ns < 100000000)
891 data->timeout_ns = 100000000;
892 }
893 }
894}
895EXPORT_SYMBOL(mmc_set_data_timeout);
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz)
912{
913
914
915
916
917
918 sz = ((sz + 3) / 4) * 4;
919
920 return sz;
921}
922EXPORT_SYMBOL(mmc_align_data_size);
923
924
925
926
927
928
929
930
931
932
933
934int __mmc_claim_host(struct mmc_host *host, atomic_t *abort)
935{
936 DECLARE_WAITQUEUE(wait, current);
937 unsigned long flags;
938 int stop;
939 bool pm = false;
940
941 might_sleep();
942
943 add_wait_queue(&host->wq, &wait);
944 spin_lock_irqsave(&host->lock, flags);
945 while (1) {
946 set_current_state(TASK_UNINTERRUPTIBLE);
947 stop = abort ? atomic_read(abort) : 0;
948 if (stop || !host->claimed || host->claimer == current)
949 break;
950 spin_unlock_irqrestore(&host->lock, flags);
951 schedule();
952 spin_lock_irqsave(&host->lock, flags);
953 }
954 set_current_state(TASK_RUNNING);
955 if (!stop) {
956 host->claimed = 1;
957 host->claimer = current;
958 host->claim_cnt += 1;
959 if (host->claim_cnt == 1)
960 pm = true;
961 } else
962 wake_up(&host->wq);
963 spin_unlock_irqrestore(&host->lock, flags);
964 remove_wait_queue(&host->wq, &wait);
965
966 if (pm)
967 pm_runtime_get_sync(mmc_dev(host));
968
969 return stop;
970}
971EXPORT_SYMBOL(__mmc_claim_host);
972
973
974
975
976
977
978
979
980void mmc_release_host(struct mmc_host *host)
981{
982 unsigned long flags;
983
984 WARN_ON(!host->claimed);
985
986 spin_lock_irqsave(&host->lock, flags);
987 if (--host->claim_cnt) {
988
989 spin_unlock_irqrestore(&host->lock, flags);
990 } else {
991 host->claimed = 0;
992 host->claimer = NULL;
993 spin_unlock_irqrestore(&host->lock, flags);
994 wake_up(&host->wq);
995 pm_runtime_mark_last_busy(mmc_dev(host));
996 pm_runtime_put_autosuspend(mmc_dev(host));
997 }
998}
999EXPORT_SYMBOL(mmc_release_host);
1000
1001
1002
1003
1004
1005void mmc_get_card(struct mmc_card *card)
1006{
1007 pm_runtime_get_sync(&card->dev);
1008 mmc_claim_host(card->host);
1009}
1010EXPORT_SYMBOL(mmc_get_card);
1011
1012
1013
1014
1015
1016void mmc_put_card(struct mmc_card *card)
1017{
1018 mmc_release_host(card->host);
1019 pm_runtime_mark_last_busy(&card->dev);
1020 pm_runtime_put_autosuspend(&card->dev);
1021}
1022EXPORT_SYMBOL(mmc_put_card);
1023
1024
1025
1026
1027
1028static inline void mmc_set_ios(struct mmc_host *host)
1029{
1030 struct mmc_ios *ios = &host->ios;
1031
1032 pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u "
1033 "width %u timing %u\n",
1034 mmc_hostname(host), ios->clock, ios->bus_mode,
1035 ios->power_mode, ios->chip_select, ios->vdd,
1036 1 << ios->bus_width, ios->timing);
1037
1038 host->ops->set_ios(host, ios);
1039}
1040
1041
1042
1043
1044void mmc_set_chip_select(struct mmc_host *host, int mode)
1045{
1046 host->ios.chip_select = mode;
1047 mmc_set_ios(host);
1048}
1049
1050
1051
1052
1053
1054void mmc_set_clock(struct mmc_host *host, unsigned int hz)
1055{
1056 WARN_ON(hz && hz < host->f_min);
1057
1058 if (hz > host->f_max)
1059 hz = host->f_max;
1060
1061 host->ios.clock = hz;
1062 mmc_set_ios(host);
1063}
1064
1065int mmc_execute_tuning(struct mmc_card *card)
1066{
1067 struct mmc_host *host = card->host;
1068 u32 opcode;
1069 int err;
1070
1071 if (!host->ops->execute_tuning)
1072 return 0;
1073
1074 if (mmc_card_mmc(card))
1075 opcode = MMC_SEND_TUNING_BLOCK_HS200;
1076 else
1077 opcode = MMC_SEND_TUNING_BLOCK;
1078
1079 err = host->ops->execute_tuning(host, opcode);
1080
1081 if (err)
1082 pr_err("%s: tuning execution failed: %d\n",
1083 mmc_hostname(host), err);
1084 else
1085 mmc_retune_enable(host);
1086
1087 return err;
1088}
1089
1090
1091
1092
1093void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
1094{
1095 host->ios.bus_mode = mode;
1096 mmc_set_ios(host);
1097}
1098
1099
1100
1101
1102void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
1103{
1104 host->ios.bus_width = width;
1105 mmc_set_ios(host);
1106}
1107
1108
1109
1110
1111void mmc_set_initial_state(struct mmc_host *host)
1112{
1113 mmc_retune_disable(host);
1114
1115 if (mmc_host_is_spi(host))
1116 host->ios.chip_select = MMC_CS_HIGH;
1117 else
1118 host->ios.chip_select = MMC_CS_DONTCARE;
1119 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
1120 host->ios.bus_width = MMC_BUS_WIDTH_1;
1121 host->ios.timing = MMC_TIMING_LEGACY;
1122 host->ios.drv_type = 0;
1123
1124 mmc_set_ios(host);
1125}
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits)
1143{
1144 const int max_bit = ilog2(MMC_VDD_35_36);
1145 int bit;
1146
1147 if (vdd < 1650 || vdd > 3600)
1148 return -EINVAL;
1149
1150 if (vdd >= 1650 && vdd <= 1950)
1151 return ilog2(MMC_VDD_165_195);
1152
1153 if (low_bits)
1154 vdd -= 1;
1155
1156
1157 bit = (vdd - 2000) / 100 + 8;
1158 if (bit > max_bit)
1159 return max_bit;
1160 return bit;
1161}
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
1177{
1178 u32 mask = 0;
1179
1180 if (vdd_max < vdd_min)
1181 return 0;
1182
1183
1184 vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false);
1185 if (vdd_max < 0)
1186 return 0;
1187
1188
1189 vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true);
1190 if (vdd_min < 0)
1191 return 0;
1192
1193
1194 while (vdd_max >= vdd_min)
1195 mask |= 1 << vdd_max--;
1196
1197 return mask;
1198}
1199EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);
1200
1201#ifdef CONFIG_OF
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212int mmc_of_parse_voltage(struct device_node *np, u32 *mask)
1213{
1214 const u32 *voltage_ranges;
1215 int num_ranges, i;
1216
1217 voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
1218 num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
1219 if (!voltage_ranges) {
1220 pr_debug("%s: voltage-ranges unspecified\n", np->full_name);
1221 return 0;
1222 }
1223 if (!num_ranges) {
1224 pr_err("%s: voltage-ranges empty\n", np->full_name);
1225 return -EINVAL;
1226 }
1227
1228 for (i = 0; i < num_ranges; i++) {
1229 const int j = i * 2;
1230 u32 ocr_mask;
1231
1232 ocr_mask = mmc_vddrange_to_ocrmask(
1233 be32_to_cpu(voltage_ranges[j]),
1234 be32_to_cpu(voltage_ranges[j + 1]));
1235 if (!ocr_mask) {
1236 pr_err("%s: voltage-range #%d is invalid\n",
1237 np->full_name, i);
1238 return -EINVAL;
1239 }
1240 *mask |= ocr_mask;
1241 }
1242
1243 return 1;
1244}
1245EXPORT_SYMBOL(mmc_of_parse_voltage);
1246
1247#endif
1248
1249static int mmc_of_get_func_num(struct device_node *node)
1250{
1251 u32 reg;
1252 int ret;
1253
1254 ret = of_property_read_u32(node, "reg", ®);
1255 if (ret < 0)
1256 return ret;
1257
1258 return reg;
1259}
1260
1261struct device_node *mmc_of_find_child_device(struct mmc_host *host,
1262 unsigned func_num)
1263{
1264 struct device_node *node;
1265
1266 if (!host->parent || !host->parent->of_node)
1267 return NULL;
1268
1269 for_each_child_of_node(host->parent->of_node, node) {
1270 if (mmc_of_get_func_num(node) == func_num)
1271 return node;
1272 }
1273
1274 return NULL;
1275}
1276
1277#ifdef CONFIG_REGULATOR
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV)
1289{
1290 int tmp;
1291
1292 if (!vdd_bit)
1293 return -EINVAL;
1294
1295
1296
1297
1298
1299
1300
1301 tmp = vdd_bit - ilog2(MMC_VDD_165_195);
1302 if (tmp == 0) {
1303 *min_uV = 1650 * 1000;
1304 *max_uV = 1950 * 1000;
1305 } else {
1306 *min_uV = 1900 * 1000 + tmp * 100 * 1000;
1307 *max_uV = *min_uV + 100 * 1000;
1308 }
1309
1310 return 0;
1311}
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322int mmc_regulator_get_ocrmask(struct regulator *supply)
1323{
1324 int result = 0;
1325 int count;
1326 int i;
1327 int vdd_uV;
1328 int vdd_mV;
1329
1330 count = regulator_count_voltages(supply);
1331 if (count < 0)
1332 return count;
1333
1334 for (i = 0; i < count; i++) {
1335 vdd_uV = regulator_list_voltage(supply, i);
1336 if (vdd_uV <= 0)
1337 continue;
1338
1339 vdd_mV = vdd_uV / 1000;
1340 result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
1341 }
1342
1343 if (!result) {
1344 vdd_uV = regulator_get_voltage(supply);
1345 if (vdd_uV <= 0)
1346 return vdd_uV;
1347
1348 vdd_mV = vdd_uV / 1000;
1349 result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
1350 }
1351
1352 return result;
1353}
1354EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368int mmc_regulator_set_ocr(struct mmc_host *mmc,
1369 struct regulator *supply,
1370 unsigned short vdd_bit)
1371{
1372 int result = 0;
1373 int min_uV, max_uV;
1374
1375 if (vdd_bit) {
1376 mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV);
1377
1378 result = regulator_set_voltage(supply, min_uV, max_uV);
1379 if (result == 0 && !mmc->regulator_enabled) {
1380 result = regulator_enable(supply);
1381 if (!result)
1382 mmc->regulator_enabled = true;
1383 }
1384 } else if (mmc->regulator_enabled) {
1385 result = regulator_disable(supply);
1386 if (result == 0)
1387 mmc->regulator_enabled = false;
1388 }
1389
1390 if (result)
1391 dev_err(mmc_dev(mmc),
1392 "could not set regulator OCR (%d)\n", result);
1393 return result;
1394}
1395EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr);
1396
1397static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator,
1398 int min_uV, int target_uV,
1399 int max_uV)
1400{
1401
1402
1403
1404
1405 if (!regulator_is_supported_voltage(regulator, min_uV, max_uV))
1406 return -EINVAL;
1407
1408 return regulator_set_voltage_triplet(regulator, min_uV, target_uV,
1409 max_uV);
1410}
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios)
1430{
1431 struct device *dev = mmc_dev(mmc);
1432 int ret, volt, min_uV, max_uV;
1433
1434
1435 if (IS_ERR(mmc->supply.vqmmc))
1436 return -EINVAL;
1437
1438 switch (ios->signal_voltage) {
1439 case MMC_SIGNAL_VOLTAGE_120:
1440 return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
1441 1100000, 1200000, 1300000);
1442 case MMC_SIGNAL_VOLTAGE_180:
1443 return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
1444 1700000, 1800000, 1950000);
1445 case MMC_SIGNAL_VOLTAGE_330:
1446 ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV);
1447 if (ret < 0)
1448 return ret;
1449
1450 dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n",
1451 __func__, volt, max_uV);
1452
1453 min_uV = max(volt - 300000, 2700000);
1454 max_uV = min(max_uV + 200000, 3600000);
1455
1456
1457
1458
1459
1460
1461
1462
1463 if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
1464 min_uV, volt, max_uV))
1465 return 0;
1466
1467 return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
1468 2700000, volt, 3600000);
1469 default:
1470 return -EINVAL;
1471 }
1472}
1473EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc);
1474
1475#endif
1476
1477int mmc_regulator_get_supply(struct mmc_host *mmc)
1478{
1479 struct device *dev = mmc_dev(mmc);
1480 int ret;
1481
1482 mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc");
1483 mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc");
1484
1485 if (IS_ERR(mmc->supply.vmmc)) {
1486 if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
1487 return -EPROBE_DEFER;
1488 dev_dbg(dev, "No vmmc regulator found\n");
1489 } else {
1490 ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
1491 if (ret > 0)
1492 mmc->ocr_avail = ret;
1493 else
1494 dev_warn(dev, "Failed getting OCR mask: %d\n", ret);
1495 }
1496
1497 if (IS_ERR(mmc->supply.vqmmc)) {
1498 if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER)
1499 return -EPROBE_DEFER;
1500 dev_dbg(dev, "No vqmmc regulator found\n");
1501 }
1502
1503 return 0;
1504}
1505EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);
1506
1507
1508
1509
1510
1511u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
1512{
1513 int bit;
1514
1515
1516
1517
1518
1519 if (ocr & 0x7F) {
1520 dev_warn(mmc_dev(host),
1521 "card claims to support voltages below defined range\n");
1522 ocr &= ~0x7F;
1523 }
1524
1525 ocr &= host->ocr_avail;
1526 if (!ocr) {
1527 dev_warn(mmc_dev(host), "no support for card's volts\n");
1528 return 0;
1529 }
1530
1531 if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) {
1532 bit = ffs(ocr) - 1;
1533 ocr &= 3 << bit;
1534 mmc_power_cycle(host, ocr);
1535 } else {
1536 bit = fls(ocr) - 1;
1537 ocr &= 3 << bit;
1538 if (bit != host->ios.vdd)
1539 dev_warn(mmc_dev(host), "exceeding card's volts\n");
1540 }
1541
1542 return ocr;
1543}
1544
1545int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
1546{
1547 int err = 0;
1548 int old_signal_voltage = host->ios.signal_voltage;
1549
1550 host->ios.signal_voltage = signal_voltage;
1551 if (host->ops->start_signal_voltage_switch)
1552 err = host->ops->start_signal_voltage_switch(host, &host->ios);
1553
1554 if (err)
1555 host->ios.signal_voltage = old_signal_voltage;
1556
1557 return err;
1558
1559}
1560
1561int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr)
1562{
1563 struct mmc_command cmd = {0};
1564 int err = 0;
1565 u32 clock;
1566
1567 BUG_ON(!host);
1568
1569
1570
1571
1572
1573 if (signal_voltage == MMC_SIGNAL_VOLTAGE_330)
1574 return __mmc_set_signal_voltage(host, signal_voltage);
1575
1576
1577
1578
1579
1580 if (!host->ops->start_signal_voltage_switch)
1581 return -EPERM;
1582 if (!host->ops->card_busy)
1583 pr_warn("%s: cannot verify signal voltage switch\n",
1584 mmc_hostname(host));
1585
1586 cmd.opcode = SD_SWITCH_VOLTAGE;
1587 cmd.arg = 0;
1588 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
1589
1590 err = mmc_wait_for_cmd(host, &cmd, 0);
1591 if (err)
1592 return err;
1593
1594 if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
1595 return -EIO;
1596
1597
1598
1599
1600
1601 mmc_delay(1);
1602 if (host->ops->card_busy && !host->ops->card_busy(host)) {
1603 err = -EAGAIN;
1604 goto power_cycle;
1605 }
1606
1607
1608
1609
1610 clock = host->ios.clock;
1611 host->ios.clock = 0;
1612 mmc_set_ios(host);
1613
1614 if (__mmc_set_signal_voltage(host, signal_voltage)) {
1615
1616
1617
1618
1619 err = -EAGAIN;
1620 goto power_cycle;
1621 }
1622
1623
1624 mmc_delay(10);
1625 host->ios.clock = clock;
1626 mmc_set_ios(host);
1627
1628
1629 mmc_delay(1);
1630
1631
1632
1633
1634
1635 if (host->ops->card_busy && host->ops->card_busy(host))
1636 err = -EAGAIN;
1637
1638power_cycle:
1639 if (err) {
1640 pr_debug("%s: Signal voltage switch failed, "
1641 "power cycling card\n", mmc_hostname(host));
1642 mmc_power_cycle(host, ocr);
1643 }
1644
1645 return err;
1646}
1647
1648
1649
1650
1651void mmc_set_timing(struct mmc_host *host, unsigned int timing)
1652{
1653 host->ios.timing = timing;
1654 mmc_set_ios(host);
1655}
1656
1657
1658
1659
1660void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
1661{
1662 host->ios.drv_type = drv_type;
1663 mmc_set_ios(host);
1664}
1665
1666int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
1667 int card_drv_type, int *drv_type)
1668{
1669 struct mmc_host *host = card->host;
1670 int host_drv_type = SD_DRIVER_TYPE_B;
1671
1672 *drv_type = 0;
1673
1674 if (!host->ops->select_drive_strength)
1675 return 0;
1676
1677
1678 if (host->caps & MMC_CAP_DRIVER_TYPE_A)
1679 host_drv_type |= SD_DRIVER_TYPE_A;
1680
1681 if (host->caps & MMC_CAP_DRIVER_TYPE_C)
1682 host_drv_type |= SD_DRIVER_TYPE_C;
1683
1684 if (host->caps & MMC_CAP_DRIVER_TYPE_D)
1685 host_drv_type |= SD_DRIVER_TYPE_D;
1686
1687
1688
1689
1690
1691
1692
1693 return host->ops->select_drive_strength(card, max_dtr,
1694 host_drv_type,
1695 card_drv_type,
1696 drv_type);
1697}
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710void mmc_power_up(struct mmc_host *host, u32 ocr)
1711{
1712 if (host->ios.power_mode == MMC_POWER_ON)
1713 return;
1714
1715 mmc_pwrseq_pre_power_on(host);
1716
1717 host->ios.vdd = fls(ocr) - 1;
1718 host->ios.power_mode = MMC_POWER_UP;
1719
1720 mmc_set_initial_state(host);
1721
1722
1723 if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0)
1724 dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
1725 else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0)
1726 dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
1727 else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0)
1728 dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");
1729
1730
1731
1732
1733
1734 mmc_delay(10);
1735
1736 mmc_pwrseq_post_power_on(host);
1737
1738 host->ios.clock = host->f_init;
1739
1740 host->ios.power_mode = MMC_POWER_ON;
1741 mmc_set_ios(host);
1742
1743
1744
1745
1746
1747 mmc_delay(10);
1748}
1749
1750void mmc_power_off(struct mmc_host *host)
1751{
1752 if (host->ios.power_mode == MMC_POWER_OFF)
1753 return;
1754
1755 mmc_pwrseq_power_off(host);
1756
1757 host->ios.clock = 0;
1758 host->ios.vdd = 0;
1759
1760 host->ios.power_mode = MMC_POWER_OFF;
1761
1762 mmc_set_initial_state(host);
1763
1764
1765
1766
1767
1768
1769 mmc_delay(1);
1770}
1771
1772void mmc_power_cycle(struct mmc_host *host, u32 ocr)
1773{
1774 mmc_power_off(host);
1775
1776 mmc_delay(1);
1777 mmc_power_up(host, ocr);
1778}
1779
1780
1781
1782
1783static void __mmc_release_bus(struct mmc_host *host)
1784{
1785 BUG_ON(!host);
1786 BUG_ON(host->bus_refs);
1787 BUG_ON(!host->bus_dead);
1788
1789 host->bus_ops = NULL;
1790}
1791
1792
1793
1794
1795static inline void mmc_bus_get(struct mmc_host *host)
1796{
1797 unsigned long flags;
1798
1799 spin_lock_irqsave(&host->lock, flags);
1800 host->bus_refs++;
1801 spin_unlock_irqrestore(&host->lock, flags);
1802}
1803
1804
1805
1806
1807
1808static inline void mmc_bus_put(struct mmc_host *host)
1809{
1810 unsigned long flags;
1811
1812 spin_lock_irqsave(&host->lock, flags);
1813 host->bus_refs--;
1814 if ((host->bus_refs == 0) && host->bus_ops)
1815 __mmc_release_bus(host);
1816 spin_unlock_irqrestore(&host->lock, flags);
1817}
1818
1819
1820
1821
1822
1823void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops)
1824{
1825 unsigned long flags;
1826
1827 BUG_ON(!host);
1828 BUG_ON(!ops);
1829
1830 WARN_ON(!host->claimed);
1831
1832 spin_lock_irqsave(&host->lock, flags);
1833
1834 BUG_ON(host->bus_ops);
1835 BUG_ON(host->bus_refs);
1836
1837 host->bus_ops = ops;
1838 host->bus_refs = 1;
1839 host->bus_dead = 0;
1840
1841 spin_unlock_irqrestore(&host->lock, flags);
1842}
1843
1844
1845
1846
1847void mmc_detach_bus(struct mmc_host *host)
1848{
1849 unsigned long flags;
1850
1851 BUG_ON(!host);
1852
1853 WARN_ON(!host->claimed);
1854 WARN_ON(!host->bus_ops);
1855
1856 spin_lock_irqsave(&host->lock, flags);
1857
1858 host->bus_dead = 1;
1859
1860 spin_unlock_irqrestore(&host->lock, flags);
1861
1862 mmc_bus_put(host);
1863}
1864
1865static void _mmc_detect_change(struct mmc_host *host, unsigned long delay,
1866 bool cd_irq)
1867{
1868#ifdef CONFIG_MMC_DEBUG
1869 unsigned long flags;
1870 spin_lock_irqsave(&host->lock, flags);
1871 WARN_ON(host->removed);
1872 spin_unlock_irqrestore(&host->lock, flags);
1873#endif
1874
1875
1876
1877
1878
1879 if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) &&
1880 device_can_wakeup(mmc_dev(host)))
1881 pm_wakeup_event(mmc_dev(host), 5000);
1882
1883 host->detect_change = 1;
1884 mmc_schedule_delayed_work(&host->detect, delay);
1885}
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897void mmc_detect_change(struct mmc_host *host, unsigned long delay)
1898{
1899 _mmc_detect_change(host, delay, true);
1900}
1901EXPORT_SYMBOL(mmc_detect_change);
1902
1903void mmc_init_erase(struct mmc_card *card)
1904{
1905 unsigned int sz;
1906
1907 if (is_power_of_2(card->erase_size))
1908 card->erase_shift = ffs(card->erase_size) - 1;
1909 else
1910 card->erase_shift = 0;
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927 if (mmc_card_sd(card) && card->ssr.au) {
1928 card->pref_erase = card->ssr.au;
1929 card->erase_shift = ffs(card->ssr.au) - 1;
1930 } else if (card->ext_csd.hc_erase_size) {
1931 card->pref_erase = card->ext_csd.hc_erase_size;
1932 } else if (card->erase_size) {
1933 sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
1934 if (sz < 128)
1935 card->pref_erase = 512 * 1024 / 512;
1936 else if (sz < 512)
1937 card->pref_erase = 1024 * 1024 / 512;
1938 else if (sz < 1024)
1939 card->pref_erase = 2 * 1024 * 1024 / 512;
1940 else
1941 card->pref_erase = 4 * 1024 * 1024 / 512;
1942 if (card->pref_erase < card->erase_size)
1943 card->pref_erase = card->erase_size;
1944 else {
1945 sz = card->pref_erase % card->erase_size;
1946 if (sz)
1947 card->pref_erase += card->erase_size - sz;
1948 }
1949 } else
1950 card->pref_erase = 0;
1951}
1952
1953static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
1954 unsigned int arg, unsigned int qty)
1955{
1956 unsigned int erase_timeout;
1957
1958 if (arg == MMC_DISCARD_ARG ||
1959 (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) {
1960 erase_timeout = card->ext_csd.trim_timeout;
1961 } else if (card->ext_csd.erase_group_def & 1) {
1962
1963 if (arg == MMC_TRIM_ARG)
1964 erase_timeout = card->ext_csd.trim_timeout;
1965 else
1966 erase_timeout = card->ext_csd.hc_erase_timeout;
1967 } else {
1968
1969 unsigned int mult = (10 << card->csd.r2w_factor);
1970 unsigned int timeout_clks = card->csd.tacc_clks * mult;
1971 unsigned int timeout_us;
1972
1973
1974 if (card->csd.tacc_ns < 1000000)
1975 timeout_us = (card->csd.tacc_ns * mult) / 1000;
1976 else
1977 timeout_us = (card->csd.tacc_ns / 1000) * mult;
1978
1979
1980
1981
1982
1983 timeout_clks <<= 1;
1984 timeout_us += (timeout_clks * 1000) /
1985 (card->host->ios.clock / 1000);
1986
1987 erase_timeout = timeout_us / 1000;
1988
1989
1990
1991
1992
1993 if (!erase_timeout)
1994 erase_timeout = 1;
1995 }
1996
1997
1998 if (arg & MMC_SECURE_ARGS) {
1999 if (arg == MMC_SECURE_ERASE_ARG)
2000 erase_timeout *= card->ext_csd.sec_erase_mult;
2001 else
2002 erase_timeout *= card->ext_csd.sec_trim_mult;
2003 }
2004
2005 erase_timeout *= qty;
2006
2007
2008
2009
2010
2011 if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
2012 erase_timeout = 1000;
2013
2014 return erase_timeout;
2015}
2016
2017static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
2018 unsigned int arg,
2019 unsigned int qty)
2020{
2021 unsigned int erase_timeout;
2022
2023 if (card->ssr.erase_timeout) {
2024
2025 erase_timeout = card->ssr.erase_timeout * qty +
2026 card->ssr.erase_offset;
2027 } else {
2028
2029
2030
2031
2032 erase_timeout = 250 * qty;
2033 }
2034
2035
2036 if (erase_timeout < 1000)
2037 erase_timeout = 1000;
2038
2039 return erase_timeout;
2040}
2041
2042static unsigned int mmc_erase_timeout(struct mmc_card *card,
2043 unsigned int arg,
2044 unsigned int qty)
2045{
2046 if (mmc_card_sd(card))
2047 return mmc_sd_erase_timeout(card, arg, qty);
2048 else
2049 return mmc_mmc_erase_timeout(card, arg, qty);
2050}
2051
2052static int mmc_do_erase(struct mmc_card *card, unsigned int from,
2053 unsigned int to, unsigned int arg)
2054{
2055 struct mmc_command cmd = {0};
2056 unsigned int qty = 0;
2057 unsigned long timeout;
2058 int err;
2059
2060 mmc_retune_hold(card->host);
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078 if (card->erase_shift)
2079 qty += ((to >> card->erase_shift) -
2080 (from >> card->erase_shift)) + 1;
2081 else if (mmc_card_sd(card))
2082 qty += to - from + 1;
2083 else
2084 qty += ((to / card->erase_size) -
2085 (from / card->erase_size)) + 1;
2086
2087 if (!mmc_card_blockaddr(card)) {
2088 from <<= 9;
2089 to <<= 9;
2090 }
2091
2092 if (mmc_card_sd(card))
2093 cmd.opcode = SD_ERASE_WR_BLK_START;
2094 else
2095 cmd.opcode = MMC_ERASE_GROUP_START;
2096 cmd.arg = from;
2097 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
2098 err = mmc_wait_for_cmd(card->host, &cmd, 0);
2099 if (err) {
2100 pr_err("mmc_erase: group start error %d, "
2101 "status %#x\n", err, cmd.resp[0]);
2102 err = -EIO;
2103 goto out;
2104 }
2105
2106 memset(&cmd, 0, sizeof(struct mmc_command));
2107 if (mmc_card_sd(card))
2108 cmd.opcode = SD_ERASE_WR_BLK_END;
2109 else
2110 cmd.opcode = MMC_ERASE_GROUP_END;
2111 cmd.arg = to;
2112 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
2113 err = mmc_wait_for_cmd(card->host, &cmd, 0);
2114 if (err) {
2115 pr_err("mmc_erase: group end error %d, status %#x\n",
2116 err, cmd.resp[0]);
2117 err = -EIO;
2118 goto out;
2119 }
2120
2121 memset(&cmd, 0, sizeof(struct mmc_command));
2122 cmd.opcode = MMC_ERASE;
2123 cmd.arg = arg;
2124 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
2125 cmd.busy_timeout = mmc_erase_timeout(card, arg, qty);
2126 err = mmc_wait_for_cmd(card->host, &cmd, 0);
2127 if (err) {
2128 pr_err("mmc_erase: erase error %d, status %#x\n",
2129 err, cmd.resp[0]);
2130 err = -EIO;
2131 goto out;
2132 }
2133
2134 if (mmc_host_is_spi(card->host))
2135 goto out;
2136
2137 timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS);
2138 do {
2139 memset(&cmd, 0, sizeof(struct mmc_command));
2140 cmd.opcode = MMC_SEND_STATUS;
2141 cmd.arg = card->rca << 16;
2142 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
2143
2144 err = mmc_wait_for_cmd(card->host, &cmd, 0);
2145 if (err || (cmd.resp[0] & 0xFDF92000)) {
2146 pr_err("error %d requesting status %#x\n",
2147 err, cmd.resp[0]);
2148 err = -EIO;
2149 goto out;
2150 }
2151
2152
2153
2154
2155 if (time_after(jiffies, timeout)) {
2156 pr_err("%s: Card stuck in programming state! %s\n",
2157 mmc_hostname(card->host), __func__);
2158 err = -EIO;
2159 goto out;
2160 }
2161
2162 } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
2163 (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG));
2164out:
2165 mmc_retune_release(card->host);
2166 return err;
2167}
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
2179 unsigned int arg)
2180{
2181 unsigned int rem, to = from + nr;
2182 int err;
2183
2184 if (!(card->host->caps & MMC_CAP_ERASE) ||
2185 !(card->csd.cmdclass & CCC_ERASE))
2186 return -EOPNOTSUPP;
2187
2188 if (!card->erase_size)
2189 return -EOPNOTSUPP;
2190
2191 if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
2192 return -EOPNOTSUPP;
2193
2194 if ((arg & MMC_SECURE_ARGS) &&
2195 !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
2196 return -EOPNOTSUPP;
2197
2198 if ((arg & MMC_TRIM_ARGS) &&
2199 !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
2200 return -EOPNOTSUPP;
2201
2202 if (arg == MMC_SECURE_ERASE_ARG) {
2203 if (from % card->erase_size || nr % card->erase_size)
2204 return -EINVAL;
2205 }
2206
2207 if (arg == MMC_ERASE_ARG) {
2208 rem = from % card->erase_size;
2209 if (rem) {
2210 rem = card->erase_size - rem;
2211 from += rem;
2212 if (nr > rem)
2213 nr -= rem;
2214 else
2215 return 0;
2216 }
2217 rem = nr % card->erase_size;
2218 if (rem)
2219 nr -= rem;
2220 }
2221
2222 if (nr == 0)
2223 return 0;
2224
2225 to = from + nr;
2226
2227 if (to <= from)
2228 return -EINVAL;
2229
2230
2231 to -= 1;
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241 rem = card->erase_size - (from % card->erase_size);
2242 if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) {
2243 err = mmc_do_erase(card, from, from + rem - 1, arg);
2244 from += rem;
2245 if ((err) || (to <= from))
2246 return err;
2247 }
2248
2249 return mmc_do_erase(card, from, to, arg);
2250}
2251EXPORT_SYMBOL(mmc_erase);
2252
2253int mmc_can_erase(struct mmc_card *card)
2254{
2255 if ((card->host->caps & MMC_CAP_ERASE) &&
2256 (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
2257 return 1;
2258 return 0;
2259}
2260EXPORT_SYMBOL(mmc_can_erase);
2261
2262int mmc_can_trim(struct mmc_card *card)
2263{
2264 if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) &&
2265 (!(card->quirks & MMC_QUIRK_TRIM_BROKEN)))
2266 return 1;
2267 return 0;
2268}
2269EXPORT_SYMBOL(mmc_can_trim);
2270
2271int mmc_can_discard(struct mmc_card *card)
2272{
2273
2274
2275
2276
2277 if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE)
2278 return 1;
2279 return 0;
2280}
2281EXPORT_SYMBOL(mmc_can_discard);
2282
2283int mmc_can_sanitize(struct mmc_card *card)
2284{
2285 if (!mmc_can_trim(card) && !mmc_can_erase(card))
2286 return 0;
2287 if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
2288 return 1;
2289 return 0;
2290}
2291EXPORT_SYMBOL(mmc_can_sanitize);
2292
2293int mmc_can_secure_erase_trim(struct mmc_card *card)
2294{
2295 if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) &&
2296 !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
2297 return 1;
2298 return 0;
2299}
2300EXPORT_SYMBOL(mmc_can_secure_erase_trim);
2301
2302int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
2303 unsigned int nr)
2304{
2305 if (!card->erase_size)
2306 return 0;
2307 if (from % card->erase_size || nr % card->erase_size)
2308 return 0;
2309 return 1;
2310}
2311EXPORT_SYMBOL(mmc_erase_group_aligned);
2312
2313static unsigned int mmc_do_calc_max_discard(struct mmc_card *card,
2314 unsigned int arg)
2315{
2316 struct mmc_host *host = card->host;
2317 unsigned int max_discard, x, y, qty = 0, max_qty, timeout;
2318 unsigned int last_timeout = 0;
2319
2320 if (card->erase_shift)
2321 max_qty = UINT_MAX >> card->erase_shift;
2322 else if (mmc_card_sd(card))
2323 max_qty = UINT_MAX;
2324 else
2325 max_qty = UINT_MAX / card->erase_size;
2326
2327
2328 do {
2329 y = 0;
2330 for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) {
2331 timeout = mmc_erase_timeout(card, arg, qty + x);
2332 if (timeout > host->max_busy_timeout)
2333 break;
2334 if (timeout < last_timeout)
2335 break;
2336 last_timeout = timeout;
2337 y = x;
2338 }
2339 qty += y;
2340 } while (y);
2341
2342 if (!qty)
2343 return 0;
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355 if (qty == 1)
2356 card->eg_boundary = 1;
2357 else
2358 qty--;
2359
2360
2361 if (card->erase_shift)
2362 max_discard = qty << card->erase_shift;
2363 else if (mmc_card_sd(card))
2364 max_discard = qty + 1;
2365 else
2366 max_discard = qty * card->erase_size;
2367
2368 return max_discard;
2369}
2370
2371unsigned int mmc_calc_max_discard(struct mmc_card *card)
2372{
2373 struct mmc_host *host = card->host;
2374 unsigned int max_discard, max_trim;
2375
2376 if (!host->max_busy_timeout)
2377 return UINT_MAX;
2378
2379
2380
2381
2382
2383
2384 if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1))
2385 return card->pref_erase;
2386
2387 max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG);
2388 if (mmc_can_trim(card)) {
2389 max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG);
2390 if (max_trim < max_discard)
2391 max_discard = max_trim;
2392 } else if (max_discard < card->erase_size) {
2393 max_discard = 0;
2394 }
2395 pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n",
2396 mmc_hostname(host), max_discard, host->max_busy_timeout);
2397 return max_discard;
2398}
2399EXPORT_SYMBOL(mmc_calc_max_discard);
2400
2401int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
2402{
2403 struct mmc_command cmd = {0};
2404
2405 if (mmc_card_blockaddr(card) || mmc_card_ddr52(card))
2406 return 0;
2407
2408 cmd.opcode = MMC_SET_BLOCKLEN;
2409 cmd.arg = blocklen;
2410 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
2411 return mmc_wait_for_cmd(card->host, &cmd, 5);
2412}
2413EXPORT_SYMBOL(mmc_set_blocklen);
2414
2415int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
2416 bool is_rel_write)
2417{
2418 struct mmc_command cmd = {0};
2419
2420 cmd.opcode = MMC_SET_BLOCK_COUNT;
2421 cmd.arg = blockcount & 0x0000FFFF;
2422 if (is_rel_write)
2423 cmd.arg |= 1 << 31;
2424 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
2425 return mmc_wait_for_cmd(card->host, &cmd, 5);
2426}
2427EXPORT_SYMBOL(mmc_set_blockcount);
2428
2429static void mmc_hw_reset_for_init(struct mmc_host *host)
2430{
2431 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
2432 return;
2433 host->ops->hw_reset(host);
2434}
2435
2436int mmc_hw_reset(struct mmc_host *host)
2437{
2438 int ret;
2439
2440 if (!host->card)
2441 return -EINVAL;
2442
2443 mmc_bus_get(host);
2444 if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) {
2445 mmc_bus_put(host);
2446 return -EOPNOTSUPP;
2447 }
2448
2449 ret = host->bus_ops->reset(host);
2450 mmc_bus_put(host);
2451
2452 if (ret != -EOPNOTSUPP)
2453 pr_warn("%s: tried to reset card\n", mmc_hostname(host));
2454
2455 return ret;
2456}
2457EXPORT_SYMBOL(mmc_hw_reset);
2458
2459static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
2460{
2461 host->f_init = freq;
2462
2463#ifdef CONFIG_MMC_DEBUG
2464 pr_info("%s: %s: trying to init card at %u Hz\n",
2465 mmc_hostname(host), __func__, host->f_init);
2466#endif
2467 mmc_power_up(host, host->ocr_avail);
2468
2469
2470
2471
2472
2473 mmc_hw_reset_for_init(host);
2474
2475
2476
2477
2478
2479
2480
2481 if (!(host->caps2 & MMC_CAP2_NO_SDIO))
2482 sdio_reset(host);
2483
2484 mmc_go_idle(host);
2485
2486 mmc_send_if_cond(host, host->ocr_avail);
2487
2488
2489 if (!(host->caps2 & MMC_CAP2_NO_SDIO))
2490 if (!mmc_attach_sdio(host))
2491 return 0;
2492
2493 if (!mmc_attach_sd(host))
2494 return 0;
2495 if (!mmc_attach_mmc(host))
2496 return 0;
2497
2498 mmc_power_off(host);
2499 return -EIO;
2500}
2501
2502int _mmc_detect_card_removed(struct mmc_host *host)
2503{
2504 int ret;
2505
2506 if (!host->card || mmc_card_removed(host->card))
2507 return 1;
2508
2509 ret = host->bus_ops->alive(host);
2510
2511
2512
2513
2514
2515
2516
2517
2518 if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) {
2519 mmc_detect_change(host, msecs_to_jiffies(200));
2520 pr_debug("%s: card removed too slowly\n", mmc_hostname(host));
2521 }
2522
2523 if (ret) {
2524 mmc_card_set_removed(host->card);
2525 pr_debug("%s: card remove detected\n", mmc_hostname(host));
2526 }
2527
2528 return ret;
2529}
2530
2531int mmc_detect_card_removed(struct mmc_host *host)
2532{
2533 struct mmc_card *card = host->card;
2534 int ret;
2535
2536 WARN_ON(!host->claimed);
2537
2538 if (!card)
2539 return 1;
2540
2541 if (!mmc_card_is_removable(host))
2542 return 0;
2543
2544 ret = mmc_card_removed(card);
2545
2546
2547
2548
2549 if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL))
2550 return ret;
2551
2552 host->detect_change = 0;
2553 if (!ret) {
2554 ret = _mmc_detect_card_removed(host);
2555 if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) {
2556
2557
2558
2559
2560 cancel_delayed_work(&host->detect);
2561 _mmc_detect_change(host, 0, false);
2562 }
2563 }
2564
2565 return ret;
2566}
2567EXPORT_SYMBOL(mmc_detect_card_removed);
2568
2569void mmc_rescan(struct work_struct *work)
2570{
2571 struct mmc_host *host =
2572 container_of(work, struct mmc_host, detect.work);
2573 int i;
2574
2575 if (host->rescan_disable)
2576 return;
2577
2578
2579 if (!mmc_card_is_removable(host) && host->rescan_entered)
2580 return;
2581 host->rescan_entered = 1;
2582
2583 if (host->trigger_card_event && host->ops->card_event) {
2584 mmc_claim_host(host);
2585 host->ops->card_event(host);
2586 mmc_release_host(host);
2587 host->trigger_card_event = false;
2588 }
2589
2590 mmc_bus_get(host);
2591
2592
2593
2594
2595
2596 if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host))
2597 host->bus_ops->detect(host);
2598
2599 host->detect_change = 0;
2600
2601
2602
2603
2604
2605 mmc_bus_put(host);
2606 mmc_bus_get(host);
2607
2608
2609 if (host->bus_ops != NULL) {
2610 mmc_bus_put(host);
2611 goto out;
2612 }
2613
2614
2615
2616
2617
2618 mmc_bus_put(host);
2619
2620 mmc_claim_host(host);
2621 if (mmc_card_is_removable(host) && host->ops->get_cd &&
2622 host->ops->get_cd(host) == 0) {
2623 mmc_power_off(host);
2624 mmc_release_host(host);
2625 goto out;
2626 }
2627
2628 for (i = 0; i < ARRAY_SIZE(freqs); i++) {
2629 if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
2630 break;
2631 if (freqs[i] <= host->f_min)
2632 break;
2633 }
2634 mmc_release_host(host);
2635
2636 out:
2637 if (host->caps & MMC_CAP_NEEDS_POLL)
2638 mmc_schedule_delayed_work(&host->detect, HZ);
2639}
2640
2641void mmc_start_host(struct mmc_host *host)
2642{
2643 host->f_init = max(freqs[0], host->f_min);
2644 host->rescan_disable = 0;
2645 host->ios.power_mode = MMC_POWER_UNDEFINED;
2646
2647 mmc_claim_host(host);
2648 if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)
2649 mmc_power_off(host);
2650 else
2651 mmc_power_up(host, host->ocr_avail);
2652 mmc_release_host(host);
2653
2654 mmc_gpiod_request_cd_irq(host);
2655 _mmc_detect_change(host, 0, false);
2656}
2657
2658void mmc_stop_host(struct mmc_host *host)
2659{
2660#ifdef CONFIG_MMC_DEBUG
2661 unsigned long flags;
2662 spin_lock_irqsave(&host->lock, flags);
2663 host->removed = 1;
2664 spin_unlock_irqrestore(&host->lock, flags);
2665#endif
2666 if (host->slot.cd_irq >= 0)
2667 disable_irq(host->slot.cd_irq);
2668
2669 host->rescan_disable = 1;
2670 cancel_delayed_work_sync(&host->detect);
2671
2672
2673 host->pm_flags = 0;
2674
2675 mmc_bus_get(host);
2676 if (host->bus_ops && !host->bus_dead) {
2677
2678 host->bus_ops->remove(host);
2679 mmc_claim_host(host);
2680 mmc_detach_bus(host);
2681 mmc_power_off(host);
2682 mmc_release_host(host);
2683 mmc_bus_put(host);
2684 return;
2685 }
2686 mmc_bus_put(host);
2687
2688 BUG_ON(host->card);
2689
2690 mmc_claim_host(host);
2691 mmc_power_off(host);
2692 mmc_release_host(host);
2693}
2694
2695int mmc_power_save_host(struct mmc_host *host)
2696{
2697 int ret = 0;
2698
2699#ifdef CONFIG_MMC_DEBUG
2700 pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__);
2701#endif
2702
2703 mmc_bus_get(host);
2704
2705 if (!host->bus_ops || host->bus_dead) {
2706 mmc_bus_put(host);
2707 return -EINVAL;
2708 }
2709
2710 if (host->bus_ops->power_save)
2711 ret = host->bus_ops->power_save(host);
2712
2713 mmc_bus_put(host);
2714
2715 mmc_power_off(host);
2716
2717 return ret;
2718}
2719EXPORT_SYMBOL(mmc_power_save_host);
2720
2721int mmc_power_restore_host(struct mmc_host *host)
2722{
2723 int ret;
2724
2725#ifdef CONFIG_MMC_DEBUG
2726 pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__);
2727#endif
2728
2729 mmc_bus_get(host);
2730
2731 if (!host->bus_ops || host->bus_dead) {
2732 mmc_bus_put(host);
2733 return -EINVAL;
2734 }
2735
2736 mmc_power_up(host, host->card->ocr);
2737 ret = host->bus_ops->power_restore(host);
2738
2739 mmc_bus_put(host);
2740
2741 return ret;
2742}
2743EXPORT_SYMBOL(mmc_power_restore_host);
2744
2745
2746
2747
2748int mmc_flush_cache(struct mmc_card *card)
2749{
2750 int err = 0;
2751
2752 if (mmc_card_mmc(card) &&
2753 (card->ext_csd.cache_size > 0) &&
2754 (card->ext_csd.cache_ctrl & 1)) {
2755 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
2756 EXT_CSD_FLUSH_CACHE, 1, 0);
2757 if (err)
2758 pr_err("%s: cache flush error %d\n",
2759 mmc_hostname(card->host), err);
2760 }
2761
2762 return err;
2763}
2764EXPORT_SYMBOL(mmc_flush_cache);
2765
2766#ifdef CONFIG_PM_SLEEP
2767
2768
2769
2770
2771static int mmc_pm_notify(struct notifier_block *notify_block,
2772 unsigned long mode, void *unused)
2773{
2774 struct mmc_host *host = container_of(
2775 notify_block, struct mmc_host, pm_notify);
2776 unsigned long flags;
2777 int err = 0;
2778
2779 switch (mode) {
2780 case PM_HIBERNATION_PREPARE:
2781 case PM_SUSPEND_PREPARE:
2782 case PM_RESTORE_PREPARE:
2783 spin_lock_irqsave(&host->lock, flags);
2784 host->rescan_disable = 1;
2785 spin_unlock_irqrestore(&host->lock, flags);
2786 cancel_delayed_work_sync(&host->detect);
2787
2788 if (!host->bus_ops)
2789 break;
2790
2791
2792 if (host->bus_ops->pre_suspend)
2793 err = host->bus_ops->pre_suspend(host);
2794 if (!err)
2795 break;
2796
2797
2798 host->bus_ops->remove(host);
2799 mmc_claim_host(host);
2800 mmc_detach_bus(host);
2801 mmc_power_off(host);
2802 mmc_release_host(host);
2803 host->pm_flags = 0;
2804 break;
2805
2806 case PM_POST_SUSPEND:
2807 case PM_POST_HIBERNATION:
2808 case PM_POST_RESTORE:
2809
2810 spin_lock_irqsave(&host->lock, flags);
2811 host->rescan_disable = 0;
2812 spin_unlock_irqrestore(&host->lock, flags);
2813 _mmc_detect_change(host, 0, false);
2814
2815 }
2816
2817 return 0;
2818}
2819
2820void mmc_register_pm_notifier(struct mmc_host *host)
2821{
2822 host->pm_notify.notifier_call = mmc_pm_notify;
2823 register_pm_notifier(&host->pm_notify);
2824}
2825
2826void mmc_unregister_pm_notifier(struct mmc_host *host)
2827{
2828 unregister_pm_notifier(&host->pm_notify);
2829}
2830#endif
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840void mmc_init_context_info(struct mmc_host *host)
2841{
2842 spin_lock_init(&host->context_info.lock);
2843 host->context_info.is_new_req = false;
2844 host->context_info.is_done_rcv = false;
2845 host->context_info.is_waiting_last_req = false;
2846 init_waitqueue_head(&host->context_info.wait);
2847}
2848
2849static int __init mmc_init(void)
2850{
2851 int ret;
2852
2853 ret = mmc_register_bus();
2854 if (ret)
2855 return ret;
2856
2857 ret = mmc_register_host_class();
2858 if (ret)
2859 goto unregister_bus;
2860
2861 ret = sdio_register_bus();
2862 if (ret)
2863 goto unregister_host_class;
2864
2865 return 0;
2866
2867unregister_host_class:
2868 mmc_unregister_host_class();
2869unregister_bus:
2870 mmc_unregister_bus();
2871 return ret;
2872}
2873
2874static void __exit mmc_exit(void)
2875{
2876 sdio_unregister_bus();
2877 mmc_unregister_host_class();
2878 mmc_unregister_bus();
2879}
2880
2881subsys_initcall(mmc_init);
2882module_exit(mmc_exit);
2883
2884MODULE_LICENSE("GPL");
2885