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12#include <linux/err.h>
13#include <linux/pm_runtime.h>
14
15#include <linux/mmc/host.h>
16#include <linux/mmc/card.h>
17#include <linux/mmc/mmc.h>
18#include <linux/mmc/sdio.h>
19#include <linux/mmc/sdio_func.h>
20#include <linux/mmc/sdio_ids.h>
21
22#include "core.h"
23#include "card.h"
24#include "host.h"
25#include "bus.h"
26#include "quirks.h"
27#include "sd.h"
28#include "sdio_bus.h"
29#include "mmc_ops.h"
30#include "sd_ops.h"
31#include "sdio_ops.h"
32#include "sdio_cis.h"
33
34static int sdio_read_fbr(struct sdio_func *func)
35{
36 int ret;
37 unsigned char data;
38
39 if (mmc_card_nonstd_func_interface(func->card)) {
40 func->class = SDIO_CLASS_NONE;
41 return 0;
42 }
43
44 ret = mmc_io_rw_direct(func->card, 0, 0,
45 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
46 if (ret)
47 goto out;
48
49 data &= 0x0f;
50
51 if (data == 0x0f) {
52 ret = mmc_io_rw_direct(func->card, 0, 0,
53 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
54 if (ret)
55 goto out;
56 }
57
58 func->class = data;
59
60out:
61 return ret;
62}
63
64static int sdio_init_func(struct mmc_card *card, unsigned int fn)
65{
66 int ret;
67 struct sdio_func *func;
68
69 if (WARN_ON(fn > SDIO_MAX_FUNCS))
70 return -EINVAL;
71
72 func = sdio_alloc_func(card);
73 if (IS_ERR(func))
74 return PTR_ERR(func);
75
76 func->num = fn;
77
78 if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
79 ret = sdio_read_fbr(func);
80 if (ret)
81 goto fail;
82
83 ret = sdio_read_func_cis(func);
84 if (ret)
85 goto fail;
86 } else {
87 func->vendor = func->card->cis.vendor;
88 func->device = func->card->cis.device;
89 func->max_blksize = func->card->cis.blksize;
90 }
91
92 card->sdio_func[fn - 1] = func;
93
94 return 0;
95
96fail:
97
98
99
100
101 sdio_remove_func(func);
102 return ret;
103}
104
105static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
106{
107 int ret;
108 int cccr_vsn;
109 int uhs = ocr & R4_18V_PRESENT;
110 unsigned char data;
111 unsigned char speed;
112
113 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
114 if (ret)
115 goto out;
116
117 cccr_vsn = data & 0x0f;
118
119 if (cccr_vsn > SDIO_CCCR_REV_3_00) {
120 pr_err("%s: unrecognised CCCR structure version %d\n",
121 mmc_hostname(card->host), cccr_vsn);
122 return -EINVAL;
123 }
124
125 card->cccr.sdio_vsn = (data & 0xf0) >> 4;
126
127 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
128 if (ret)
129 goto out;
130
131 if (data & SDIO_CCCR_CAP_SMB)
132 card->cccr.multi_block = 1;
133 if (data & SDIO_CCCR_CAP_LSC)
134 card->cccr.low_speed = 1;
135 if (data & SDIO_CCCR_CAP_4BLS)
136 card->cccr.wide_bus = 1;
137
138 if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
139 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
140 if (ret)
141 goto out;
142
143 if (data & SDIO_POWER_SMPC)
144 card->cccr.high_power = 1;
145 }
146
147 if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
148 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
149 if (ret)
150 goto out;
151
152 card->scr.sda_spec3 = 0;
153 card->sw_caps.sd3_bus_mode = 0;
154 card->sw_caps.sd3_drv_type = 0;
155 if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
156 card->scr.sda_spec3 = 1;
157 ret = mmc_io_rw_direct(card, 0, 0,
158 SDIO_CCCR_UHS, 0, &data);
159 if (ret)
160 goto out;
161
162 if (mmc_host_uhs(card->host)) {
163 if (data & SDIO_UHS_DDR50)
164 card->sw_caps.sd3_bus_mode
165 |= SD_MODE_UHS_DDR50;
166
167 if (data & SDIO_UHS_SDR50)
168 card->sw_caps.sd3_bus_mode
169 |= SD_MODE_UHS_SDR50;
170
171 if (data & SDIO_UHS_SDR104)
172 card->sw_caps.sd3_bus_mode
173 |= SD_MODE_UHS_SDR104;
174 }
175
176 ret = mmc_io_rw_direct(card, 0, 0,
177 SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
178 if (ret)
179 goto out;
180
181 if (data & SDIO_DRIVE_SDTA)
182 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
183 if (data & SDIO_DRIVE_SDTC)
184 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
185 if (data & SDIO_DRIVE_SDTD)
186 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
187 }
188
189
190 if (!card->sw_caps.sd3_bus_mode) {
191 if (speed & SDIO_SPEED_SHS) {
192 card->cccr.high_speed = 1;
193 card->sw_caps.hs_max_dtr = 50000000;
194 } else {
195 card->cccr.high_speed = 0;
196 card->sw_caps.hs_max_dtr = 25000000;
197 }
198 }
199 }
200
201out:
202 return ret;
203}
204
205static int sdio_enable_wide(struct mmc_card *card)
206{
207 int ret;
208 u8 ctrl;
209
210 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
211 return 0;
212
213 if (card->cccr.low_speed && !card->cccr.wide_bus)
214 return 0;
215
216 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
217 if (ret)
218 return ret;
219
220 if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
221 pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
222 mmc_hostname(card->host), ctrl);
223
224
225 ctrl &= ~SDIO_BUS_WIDTH_MASK;
226 ctrl |= SDIO_BUS_WIDTH_4BIT;
227
228 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
229 if (ret)
230 return ret;
231
232 return 1;
233}
234
235
236
237
238
239
240
241static int sdio_disable_cd(struct mmc_card *card)
242{
243 int ret;
244 u8 ctrl;
245
246 if (!mmc_card_disable_cd(card))
247 return 0;
248
249 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
250 if (ret)
251 return ret;
252
253 ctrl |= SDIO_BUS_CD_DISABLE;
254
255 return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
256}
257
258
259
260
261
262static int sdio_disable_wide(struct mmc_card *card)
263{
264 int ret;
265 u8 ctrl;
266
267 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
268 return 0;
269
270 if (card->cccr.low_speed && !card->cccr.wide_bus)
271 return 0;
272
273 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
274 if (ret)
275 return ret;
276
277 if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
278 return 0;
279
280 ctrl &= ~SDIO_BUS_WIDTH_4BIT;
281 ctrl |= SDIO_BUS_ASYNC_INT;
282
283 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
284 if (ret)
285 return ret;
286
287 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
288
289 return 0;
290}
291
292
293static int sdio_enable_4bit_bus(struct mmc_card *card)
294{
295 int err;
296
297 if (card->type == MMC_TYPE_SDIO)
298 err = sdio_enable_wide(card);
299 else if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
300 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
301 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
302 if (err)
303 return err;
304 err = sdio_enable_wide(card);
305 if (err <= 0)
306 mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
307 } else
308 return 0;
309
310 if (err > 0) {
311 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
312 err = 0;
313 }
314
315 return err;
316}
317
318
319
320
321
322static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
323{
324 int ret;
325 u8 speed;
326
327 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
328 return 0;
329
330 if (!card->cccr.high_speed)
331 return 0;
332
333 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
334 if (ret)
335 return ret;
336
337 if (enable)
338 speed |= SDIO_SPEED_EHS;
339 else
340 speed &= ~SDIO_SPEED_EHS;
341
342 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
343 if (ret)
344 return ret;
345
346 return 1;
347}
348
349
350
351
352static int sdio_enable_hs(struct mmc_card *card)
353{
354 int ret;
355
356 ret = mmc_sdio_switch_hs(card, true);
357 if (ret <= 0 || card->type == MMC_TYPE_SDIO)
358 return ret;
359
360 ret = mmc_sd_switch_hs(card);
361 if (ret <= 0)
362 mmc_sdio_switch_hs(card, false);
363
364 return ret;
365}
366
367static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
368{
369 unsigned max_dtr;
370
371 if (mmc_card_hs(card)) {
372
373
374
375
376
377
378 max_dtr = 50000000;
379 } else {
380 max_dtr = card->cis.max_dtr;
381 }
382
383 if (card->type == MMC_TYPE_SD_COMBO)
384 max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
385
386 return max_dtr;
387}
388
389static unsigned char host_drive_to_sdio_drive(int host_strength)
390{
391 switch (host_strength) {
392 case MMC_SET_DRIVER_TYPE_A:
393 return SDIO_DTSx_SET_TYPE_A;
394 case MMC_SET_DRIVER_TYPE_B:
395 return SDIO_DTSx_SET_TYPE_B;
396 case MMC_SET_DRIVER_TYPE_C:
397 return SDIO_DTSx_SET_TYPE_C;
398 case MMC_SET_DRIVER_TYPE_D:
399 return SDIO_DTSx_SET_TYPE_D;
400 default:
401 return SDIO_DTSx_SET_TYPE_B;
402 }
403}
404
405static void sdio_select_driver_type(struct mmc_card *card)
406{
407 int card_drv_type, drive_strength, drv_type;
408 unsigned char card_strength;
409 int err;
410
411 card->drive_strength = 0;
412
413 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
414
415 drive_strength = mmc_select_drive_strength(card,
416 card->sw_caps.uhs_max_dtr,
417 card_drv_type, &drv_type);
418
419 if (drive_strength) {
420
421 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
422 &card_strength);
423 if (err)
424 return;
425
426 card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
427 card_strength |= host_drive_to_sdio_drive(drive_strength);
428
429
430 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
431 card_strength, NULL);
432 if (err)
433 return;
434 card->drive_strength = drive_strength;
435 }
436
437 if (drv_type)
438 mmc_set_driver_type(card->host, drv_type);
439}
440
441
442static int sdio_set_bus_speed_mode(struct mmc_card *card)
443{
444 unsigned int bus_speed, timing;
445 int err;
446 unsigned char speed;
447
448
449
450
451
452 if (!mmc_host_uhs(card->host))
453 return 0;
454
455 bus_speed = SDIO_SPEED_SDR12;
456 timing = MMC_TIMING_UHS_SDR12;
457 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
458 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
459 bus_speed = SDIO_SPEED_SDR104;
460 timing = MMC_TIMING_UHS_SDR104;
461 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
462 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
463 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
464 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
465 bus_speed = SDIO_SPEED_DDR50;
466 timing = MMC_TIMING_UHS_DDR50;
467 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
468 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
469 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
470 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
471 SD_MODE_UHS_SDR50)) {
472 bus_speed = SDIO_SPEED_SDR50;
473 timing = MMC_TIMING_UHS_SDR50;
474 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
475 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
476 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
477 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
478 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
479 bus_speed = SDIO_SPEED_SDR25;
480 timing = MMC_TIMING_UHS_SDR25;
481 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
482 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
483 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
484 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
485 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
486 SD_MODE_UHS_SDR12)) {
487 bus_speed = SDIO_SPEED_SDR12;
488 timing = MMC_TIMING_UHS_SDR12;
489 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
490 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
491 }
492
493 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
494 if (err)
495 return err;
496
497 speed &= ~SDIO_SPEED_BSS_MASK;
498 speed |= bus_speed;
499 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
500 if (err)
501 return err;
502
503 if (bus_speed) {
504 mmc_set_timing(card->host, timing);
505 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
506 }
507
508 return 0;
509}
510
511
512
513
514static int mmc_sdio_init_uhs_card(struct mmc_card *card)
515{
516 int err;
517
518 if (!card->scr.sda_spec3)
519 return 0;
520
521
522 err = sdio_enable_4bit_bus(card);
523 if (err)
524 goto out;
525
526
527 sdio_select_driver_type(card);
528
529
530 err = sdio_set_bus_speed_mode(card);
531 if (err)
532 goto out;
533
534
535
536
537
538 if (!mmc_host_is_spi(card->host) &&
539 ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
540 (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
541 err = mmc_execute_tuning(card);
542out:
543 return err;
544}
545
546static void mmc_sdio_resend_if_cond(struct mmc_host *host,
547 struct mmc_card *card)
548{
549 sdio_reset(host);
550 mmc_go_idle(host);
551 mmc_send_if_cond(host, host->ocr_avail);
552 mmc_remove_card(card);
553}
554
555
556
557
558
559
560
561static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
562 struct mmc_card *oldcard, int powered_resume)
563{
564 struct mmc_card *card;
565 int err;
566 int retries = 10;
567 u32 rocr = 0;
568 u32 ocr_card = ocr;
569
570 WARN_ON(!host->claimed);
571
572
573 if (mmc_host_uhs(host))
574 ocr |= R4_18V_PRESENT;
575
576try_again:
577 if (!retries) {
578 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
579 ocr &= ~R4_18V_PRESENT;
580 }
581
582
583
584
585 if (!powered_resume) {
586 err = mmc_send_io_op_cond(host, ocr, &rocr);
587 if (err)
588 goto err;
589 }
590
591
592
593
594 if (mmc_host_is_spi(host)) {
595 err = mmc_spi_set_crc(host, use_spi_crc);
596 if (err)
597 goto err;
598 }
599
600
601
602
603 card = mmc_alloc_card(host, NULL);
604 if (IS_ERR(card)) {
605 err = PTR_ERR(card);
606 goto err;
607 }
608
609 if ((rocr & R4_MEMORY_PRESENT) &&
610 mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) {
611 card->type = MMC_TYPE_SD_COMBO;
612
613 if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
614 memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
615 mmc_remove_card(card);
616 return -ENOENT;
617 }
618 } else {
619 card->type = MMC_TYPE_SDIO;
620
621 if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
622 mmc_remove_card(card);
623 return -ENOENT;
624 }
625 }
626
627
628
629
630 if (host->ops->init_card)
631 host->ops->init_card(host, card);
632
633
634
635
636
637
638
639
640
641
642
643
644 if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) {
645 err = mmc_set_uhs_voltage(host, ocr_card);
646 if (err == -EAGAIN) {
647 mmc_sdio_resend_if_cond(host, card);
648 retries--;
649 goto try_again;
650 } else if (err) {
651 ocr &= ~R4_18V_PRESENT;
652 }
653 }
654
655
656
657
658 if (!powered_resume && !mmc_host_is_spi(host)) {
659 err = mmc_send_relative_addr(host, &card->rca);
660 if (err)
661 goto remove;
662
663
664
665
666
667
668 if (oldcard)
669 oldcard->rca = card->rca;
670 }
671
672
673
674
675 if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
676 err = mmc_sd_get_csd(host, card);
677 if (err)
678 return err;
679
680 mmc_decode_cid(card);
681 }
682
683
684
685
686 if (!powered_resume && !mmc_host_is_spi(host)) {
687 err = mmc_select_card(card);
688 if (err)
689 goto remove;
690 }
691
692 if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
693
694
695
696
697
698
699 mmc_set_clock(host, card->cis.max_dtr);
700
701 if (card->cccr.high_speed) {
702 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
703 }
704
705 goto finish;
706 }
707
708
709
710
711
712 err = sdio_read_cccr(card, ocr);
713 if (err) {
714 mmc_sdio_resend_if_cond(host, card);
715 if (ocr & R4_18V_PRESENT) {
716
717 retries = 0;
718 goto try_again;
719 } else {
720 goto remove;
721 }
722 }
723
724
725
726
727 err = sdio_read_common_cis(card);
728 if (err)
729 goto remove;
730
731 if (oldcard) {
732 int same = (card->cis.vendor == oldcard->cis.vendor &&
733 card->cis.device == oldcard->cis.device);
734 mmc_remove_card(card);
735 if (!same)
736 return -ENOENT;
737
738 card = oldcard;
739 }
740 card->ocr = ocr_card;
741 mmc_fixup_device(card, sdio_fixup_methods);
742
743 if (card->type == MMC_TYPE_SD_COMBO) {
744 err = mmc_sd_setup_card(host, card, oldcard != NULL);
745
746 if (err) {
747 mmc_go_idle(host);
748 if (mmc_host_is_spi(host))
749
750 mmc_spi_set_crc(host, use_spi_crc);
751 card->type = MMC_TYPE_SDIO;
752 } else
753 card->dev.type = &sd_type;
754 }
755
756
757
758
759 err = sdio_disable_cd(card);
760 if (err)
761 goto remove;
762
763
764
765 if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
766 err = mmc_sdio_init_uhs_card(card);
767 if (err)
768 goto remove;
769 } else {
770
771
772
773 err = sdio_enable_hs(card);
774 if (err > 0)
775 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
776 else if (err)
777 goto remove;
778
779
780
781
782 mmc_set_clock(host, mmc_sdio_get_max_clock(card));
783
784
785
786
787 err = sdio_enable_4bit_bus(card);
788 if (err)
789 goto remove;
790 }
791finish:
792 if (!oldcard)
793 host->card = card;
794 return 0;
795
796remove:
797 if (!oldcard)
798 mmc_remove_card(card);
799
800err:
801 return err;
802}
803
804
805
806
807static void mmc_sdio_remove(struct mmc_host *host)
808{
809 int i;
810
811 for (i = 0;i < host->card->sdio_funcs;i++) {
812 if (host->card->sdio_func[i]) {
813 sdio_remove_func(host->card->sdio_func[i]);
814 host->card->sdio_func[i] = NULL;
815 }
816 }
817
818 mmc_remove_card(host->card);
819 host->card = NULL;
820}
821
822
823
824
825static int mmc_sdio_alive(struct mmc_host *host)
826{
827 return mmc_select_card(host->card);
828}
829
830
831
832
833static void mmc_sdio_detect(struct mmc_host *host)
834{
835 int err;
836
837
838 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
839 err = pm_runtime_get_sync(&host->card->dev);
840 if (err < 0) {
841 pm_runtime_put_noidle(&host->card->dev);
842 goto out;
843 }
844 }
845
846 mmc_claim_host(host);
847
848
849
850
851 err = _mmc_detect_card_removed(host);
852
853 mmc_release_host(host);
854
855
856
857
858
859
860
861
862
863
864
865
866 if (host->caps & MMC_CAP_POWER_OFF_CARD)
867 pm_runtime_put_sync(&host->card->dev);
868
869out:
870 if (err) {
871 mmc_sdio_remove(host);
872
873 mmc_claim_host(host);
874 mmc_detach_bus(host);
875 mmc_power_off(host);
876 mmc_release_host(host);
877 }
878}
879
880
881
882
883
884
885static int mmc_sdio_pre_suspend(struct mmc_host *host)
886{
887 int i, err = 0;
888
889 for (i = 0; i < host->card->sdio_funcs; i++) {
890 struct sdio_func *func = host->card->sdio_func[i];
891 if (func && sdio_func_present(func) && func->dev.driver) {
892 const struct dev_pm_ops *pmops = func->dev.driver->pm;
893 if (!pmops || !pmops->suspend || !pmops->resume) {
894
895 err = -ENOSYS;
896 break;
897 }
898 }
899 }
900
901 return err;
902}
903
904
905
906
907static int mmc_sdio_suspend(struct mmc_host *host)
908{
909 mmc_claim_host(host);
910
911 if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
912 sdio_disable_wide(host->card);
913
914 if (!mmc_card_keep_power(host)) {
915 mmc_power_off(host);
916 } else if (host->retune_period) {
917 mmc_retune_timer_stop(host);
918 mmc_retune_needed(host);
919 }
920
921 mmc_release_host(host);
922
923 return 0;
924}
925
926static int mmc_sdio_resume(struct mmc_host *host)
927{
928 int err = 0;
929
930
931 mmc_claim_host(host);
932
933
934 if (!mmc_card_keep_power(host)) {
935 mmc_power_up(host, host->card->ocr);
936
937
938
939
940
941
942 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
943 pm_runtime_disable(&host->card->dev);
944 pm_runtime_set_active(&host->card->dev);
945 pm_runtime_enable(&host->card->dev);
946 }
947 }
948
949
950 if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) {
951 sdio_reset(host);
952 mmc_go_idle(host);
953 mmc_send_if_cond(host, host->card->ocr);
954 err = mmc_send_io_op_cond(host, 0, NULL);
955 if (!err)
956 err = mmc_sdio_init_card(host, host->card->ocr,
957 host->card,
958 mmc_card_keep_power(host));
959 } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
960
961 err = sdio_enable_4bit_bus(host->card);
962 }
963
964 if (!err && host->sdio_irqs) {
965 if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
966 wake_up_process(host->sdio_irq_thread);
967 else if (host->caps & MMC_CAP_SDIO_IRQ)
968 host->ops->enable_sdio_irq(host, 1);
969 }
970
971 mmc_release_host(host);
972
973 host->pm_flags &= ~MMC_PM_KEEP_POWER;
974 return err;
975}
976
977static int mmc_sdio_power_restore(struct mmc_host *host)
978{
979 int ret;
980
981 mmc_claim_host(host);
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000 sdio_reset(host);
1001 mmc_go_idle(host);
1002 mmc_send_if_cond(host, host->card->ocr);
1003
1004 ret = mmc_send_io_op_cond(host, 0, NULL);
1005 if (ret)
1006 goto out;
1007
1008 ret = mmc_sdio_init_card(host, host->card->ocr, host->card,
1009 mmc_card_keep_power(host));
1010 if (!ret && host->sdio_irqs)
1011 mmc_signal_sdio_irq(host);
1012
1013out:
1014 mmc_release_host(host);
1015
1016 return ret;
1017}
1018
1019static int mmc_sdio_runtime_suspend(struct mmc_host *host)
1020{
1021
1022 mmc_claim_host(host);
1023 mmc_power_off(host);
1024 mmc_release_host(host);
1025
1026 return 0;
1027}
1028
1029static int mmc_sdio_runtime_resume(struct mmc_host *host)
1030{
1031 int ret;
1032
1033
1034 mmc_claim_host(host);
1035 mmc_power_up(host, host->card->ocr);
1036 ret = mmc_sdio_power_restore(host);
1037 mmc_release_host(host);
1038
1039 return ret;
1040}
1041
1042static int mmc_sdio_reset(struct mmc_host *host)
1043{
1044 mmc_power_cycle(host, host->card->ocr);
1045 return mmc_sdio_power_restore(host);
1046}
1047
1048static const struct mmc_bus_ops mmc_sdio_ops = {
1049 .remove = mmc_sdio_remove,
1050 .detect = mmc_sdio_detect,
1051 .pre_suspend = mmc_sdio_pre_suspend,
1052 .suspend = mmc_sdio_suspend,
1053 .resume = mmc_sdio_resume,
1054 .runtime_suspend = mmc_sdio_runtime_suspend,
1055 .runtime_resume = mmc_sdio_runtime_resume,
1056 .power_restore = mmc_sdio_power_restore,
1057 .alive = mmc_sdio_alive,
1058 .reset = mmc_sdio_reset,
1059};
1060
1061
1062
1063
1064
1065int mmc_attach_sdio(struct mmc_host *host)
1066{
1067 int err, i, funcs;
1068 u32 ocr, rocr;
1069 struct mmc_card *card;
1070
1071 WARN_ON(!host->claimed);
1072
1073 err = mmc_send_io_op_cond(host, 0, &ocr);
1074 if (err)
1075 return err;
1076
1077 mmc_attach_bus(host, &mmc_sdio_ops);
1078 if (host->ocr_avail_sdio)
1079 host->ocr_avail = host->ocr_avail_sdio;
1080
1081
1082 rocr = mmc_select_voltage(host, ocr);
1083
1084
1085
1086
1087 if (!rocr) {
1088 err = -EINVAL;
1089 goto err;
1090 }
1091
1092
1093
1094
1095 err = mmc_sdio_init_card(host, rocr, NULL, 0);
1096 if (err)
1097 goto err;
1098
1099 card = host->card;
1100
1101
1102
1103
1104 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
1105
1106
1107
1108
1109 pm_runtime_get_noresume(&card->dev);
1110
1111
1112
1113
1114 err = pm_runtime_set_active(&card->dev);
1115 if (err)
1116 goto remove;
1117
1118
1119
1120
1121 pm_runtime_enable(&card->dev);
1122 }
1123
1124
1125
1126
1127
1128 funcs = (ocr & 0x70000000) >> 28;
1129 card->sdio_funcs = 0;
1130
1131
1132
1133
1134 for (i = 0; i < funcs; i++, card->sdio_funcs++) {
1135 err = sdio_init_func(host->card, i + 1);
1136 if (err)
1137 goto remove;
1138
1139
1140
1141
1142 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1143 pm_runtime_enable(&card->sdio_func[i]->dev);
1144 }
1145
1146
1147
1148
1149 mmc_release_host(host);
1150 err = mmc_add_card(host->card);
1151 if (err)
1152 goto remove_added;
1153
1154
1155
1156
1157 for (i = 0;i < funcs;i++) {
1158 err = sdio_add_func(host->card->sdio_func[i]);
1159 if (err)
1160 goto remove_added;
1161 }
1162
1163 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1164 pm_runtime_put(&card->dev);
1165
1166 mmc_claim_host(host);
1167 return 0;
1168
1169
1170remove:
1171 mmc_release_host(host);
1172remove_added:
1173
1174
1175
1176
1177
1178
1179 mmc_sdio_remove(host);
1180 mmc_claim_host(host);
1181err:
1182 mmc_detach_bus(host);
1183
1184 pr_err("%s: error %d whilst initialising SDIO card\n",
1185 mmc_hostname(host), err);
1186
1187 return err;
1188}
1189
1190