1
2
3
4
5
6
7
8#include <linux/err.h>
9#include <linux/pm_runtime.h>
10
11#include <linux/mmc/host.h>
12#include <linux/mmc/card.h>
13#include <linux/mmc/mmc.h>
14#include <linux/mmc/sdio.h>
15#include <linux/mmc/sdio_func.h>
16#include <linux/mmc/sdio_ids.h>
17
18#include "core.h"
19#include "card.h"
20#include "host.h"
21#include "bus.h"
22#include "quirks.h"
23#include "sd.h"
24#include "sdio_bus.h"
25#include "mmc_ops.h"
26#include "sd_ops.h"
27#include "sdio_ops.h"
28#include "sdio_cis.h"
29
30MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
31MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
32MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
33MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
34
35static struct attribute *sdio_std_attrs[] = {
36 &dev_attr_vendor.attr,
37 &dev_attr_device.attr,
38 &dev_attr_ocr.attr,
39 &dev_attr_rca.attr,
40 NULL,
41};
42ATTRIBUTE_GROUPS(sdio_std);
43
44static struct device_type sdio_type = {
45 .groups = sdio_std_groups,
46};
47
48static int sdio_read_fbr(struct sdio_func *func)
49{
50 int ret;
51 unsigned char data;
52
53 if (mmc_card_nonstd_func_interface(func->card)) {
54 func->class = SDIO_CLASS_NONE;
55 return 0;
56 }
57
58 ret = mmc_io_rw_direct(func->card, 0, 0,
59 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
60 if (ret)
61 goto out;
62
63 data &= 0x0f;
64
65 if (data == 0x0f) {
66 ret = mmc_io_rw_direct(func->card, 0, 0,
67 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
68 if (ret)
69 goto out;
70 }
71
72 func->class = data;
73
74out:
75 return ret;
76}
77
78static int sdio_init_func(struct mmc_card *card, unsigned int fn)
79{
80 int ret;
81 struct sdio_func *func;
82
83 if (WARN_ON(fn > SDIO_MAX_FUNCS))
84 return -EINVAL;
85
86 func = sdio_alloc_func(card);
87 if (IS_ERR(func))
88 return PTR_ERR(func);
89
90 func->num = fn;
91
92 if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
93 ret = sdio_read_fbr(func);
94 if (ret)
95 goto fail;
96
97 ret = sdio_read_func_cis(func);
98 if (ret)
99 goto fail;
100 } else {
101 func->vendor = func->card->cis.vendor;
102 func->device = func->card->cis.device;
103 func->max_blksize = func->card->cis.blksize;
104 }
105
106 card->sdio_func[fn - 1] = func;
107
108 return 0;
109
110fail:
111
112
113
114
115 sdio_remove_func(func);
116 return ret;
117}
118
119static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
120{
121 int ret;
122 int cccr_vsn;
123 int uhs = ocr & R4_18V_PRESENT;
124 unsigned char data;
125 unsigned char speed;
126
127 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
128 if (ret)
129 goto out;
130
131 cccr_vsn = data & 0x0f;
132
133 if (cccr_vsn > SDIO_CCCR_REV_3_00) {
134 pr_err("%s: unrecognised CCCR structure version %d\n",
135 mmc_hostname(card->host), cccr_vsn);
136 return -EINVAL;
137 }
138
139 card->cccr.sdio_vsn = (data & 0xf0) >> 4;
140
141 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
142 if (ret)
143 goto out;
144
145 if (data & SDIO_CCCR_CAP_SMB)
146 card->cccr.multi_block = 1;
147 if (data & SDIO_CCCR_CAP_LSC)
148 card->cccr.low_speed = 1;
149 if (data & SDIO_CCCR_CAP_4BLS)
150 card->cccr.wide_bus = 1;
151
152 if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
153 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
154 if (ret)
155 goto out;
156
157 if (data & SDIO_POWER_SMPC)
158 card->cccr.high_power = 1;
159 }
160
161 if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
162 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
163 if (ret)
164 goto out;
165
166 card->scr.sda_spec3 = 0;
167 card->sw_caps.sd3_bus_mode = 0;
168 card->sw_caps.sd3_drv_type = 0;
169 if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
170 card->scr.sda_spec3 = 1;
171 ret = mmc_io_rw_direct(card, 0, 0,
172 SDIO_CCCR_UHS, 0, &data);
173 if (ret)
174 goto out;
175
176 if (mmc_host_uhs(card->host)) {
177 if (data & SDIO_UHS_DDR50)
178 card->sw_caps.sd3_bus_mode
179 |= SD_MODE_UHS_DDR50 | SD_MODE_UHS_SDR50
180 | SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12;
181
182 if (data & SDIO_UHS_SDR50)
183 card->sw_caps.sd3_bus_mode
184 |= SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR25
185 | SD_MODE_UHS_SDR12;
186
187 if (data & SDIO_UHS_SDR104)
188 card->sw_caps.sd3_bus_mode
189 |= SD_MODE_UHS_SDR104 | SD_MODE_UHS_SDR50
190 | SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12;
191 }
192
193 ret = mmc_io_rw_direct(card, 0, 0,
194 SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
195 if (ret)
196 goto out;
197
198 if (data & SDIO_DRIVE_SDTA)
199 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
200 if (data & SDIO_DRIVE_SDTC)
201 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
202 if (data & SDIO_DRIVE_SDTD)
203 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
204 }
205
206
207 if (!card->sw_caps.sd3_bus_mode) {
208 if (speed & SDIO_SPEED_SHS) {
209 card->cccr.high_speed = 1;
210 card->sw_caps.hs_max_dtr = 50000000;
211 } else {
212 card->cccr.high_speed = 0;
213 card->sw_caps.hs_max_dtr = 25000000;
214 }
215 }
216 }
217
218out:
219 return ret;
220}
221
222static int sdio_enable_wide(struct mmc_card *card)
223{
224 int ret;
225 u8 ctrl;
226
227 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
228 return 0;
229
230 if (card->cccr.low_speed && !card->cccr.wide_bus)
231 return 0;
232
233 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
234 if (ret)
235 return ret;
236
237 if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
238 pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
239 mmc_hostname(card->host), ctrl);
240
241
242 ctrl &= ~SDIO_BUS_WIDTH_MASK;
243 ctrl |= SDIO_BUS_WIDTH_4BIT;
244
245 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
246 if (ret)
247 return ret;
248
249 return 1;
250}
251
252
253
254
255
256
257
258static int sdio_disable_cd(struct mmc_card *card)
259{
260 int ret;
261 u8 ctrl;
262
263 if (!mmc_card_disable_cd(card))
264 return 0;
265
266 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
267 if (ret)
268 return ret;
269
270 ctrl |= SDIO_BUS_CD_DISABLE;
271
272 return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
273}
274
275
276
277
278
279static int sdio_disable_wide(struct mmc_card *card)
280{
281 int ret;
282 u8 ctrl;
283
284 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
285 return 0;
286
287 if (card->cccr.low_speed && !card->cccr.wide_bus)
288 return 0;
289
290 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
291 if (ret)
292 return ret;
293
294 if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
295 return 0;
296
297 ctrl &= ~SDIO_BUS_WIDTH_4BIT;
298 ctrl |= SDIO_BUS_ASYNC_INT;
299
300 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
301 if (ret)
302 return ret;
303
304 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
305
306 return 0;
307}
308
309static int sdio_disable_4bit_bus(struct mmc_card *card)
310{
311 int err;
312
313 if (card->type == MMC_TYPE_SDIO)
314 goto out;
315
316 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
317 return 0;
318
319 if (!(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4))
320 return 0;
321
322 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
323 if (err)
324 return err;
325
326out:
327 return sdio_disable_wide(card);
328}
329
330
331static int sdio_enable_4bit_bus(struct mmc_card *card)
332{
333 int err;
334
335 err = sdio_enable_wide(card);
336 if (err <= 0)
337 return err;
338 if (card->type == MMC_TYPE_SDIO)
339 goto out;
340
341 if (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) {
342 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
343 if (err) {
344 sdio_disable_wide(card);
345 return err;
346 }
347 }
348out:
349 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
350
351 return 0;
352}
353
354
355
356
357
358static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
359{
360 int ret;
361 u8 speed;
362
363 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
364 return 0;
365
366 if (!card->cccr.high_speed)
367 return 0;
368
369 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
370 if (ret)
371 return ret;
372
373 if (enable)
374 speed |= SDIO_SPEED_EHS;
375 else
376 speed &= ~SDIO_SPEED_EHS;
377
378 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
379 if (ret)
380 return ret;
381
382 return 1;
383}
384
385
386
387
388static int sdio_enable_hs(struct mmc_card *card)
389{
390 int ret;
391
392 ret = mmc_sdio_switch_hs(card, true);
393 if (ret <= 0 || card->type == MMC_TYPE_SDIO)
394 return ret;
395
396 ret = mmc_sd_switch_hs(card);
397 if (ret <= 0)
398 mmc_sdio_switch_hs(card, false);
399
400 return ret;
401}
402
403static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
404{
405 unsigned max_dtr;
406
407 if (mmc_card_hs(card)) {
408
409
410
411
412
413
414 max_dtr = 50000000;
415 } else {
416 max_dtr = card->cis.max_dtr;
417 }
418
419 if (card->type == MMC_TYPE_SD_COMBO)
420 max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
421
422 return max_dtr;
423}
424
425static unsigned char host_drive_to_sdio_drive(int host_strength)
426{
427 switch (host_strength) {
428 case MMC_SET_DRIVER_TYPE_A:
429 return SDIO_DTSx_SET_TYPE_A;
430 case MMC_SET_DRIVER_TYPE_B:
431 return SDIO_DTSx_SET_TYPE_B;
432 case MMC_SET_DRIVER_TYPE_C:
433 return SDIO_DTSx_SET_TYPE_C;
434 case MMC_SET_DRIVER_TYPE_D:
435 return SDIO_DTSx_SET_TYPE_D;
436 default:
437 return SDIO_DTSx_SET_TYPE_B;
438 }
439}
440
441static void sdio_select_driver_type(struct mmc_card *card)
442{
443 int card_drv_type, drive_strength, drv_type;
444 unsigned char card_strength;
445 int err;
446
447 card->drive_strength = 0;
448
449 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
450
451 drive_strength = mmc_select_drive_strength(card,
452 card->sw_caps.uhs_max_dtr,
453 card_drv_type, &drv_type);
454
455 if (drive_strength) {
456
457 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
458 &card_strength);
459 if (err)
460 return;
461
462 card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
463 card_strength |= host_drive_to_sdio_drive(drive_strength);
464
465
466 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
467 card_strength, NULL);
468 if (err)
469 return;
470 card->drive_strength = drive_strength;
471 }
472
473 if (drv_type)
474 mmc_set_driver_type(card->host, drv_type);
475}
476
477
478static int sdio_set_bus_speed_mode(struct mmc_card *card)
479{
480 unsigned int bus_speed, timing;
481 int err;
482 unsigned char speed;
483 unsigned int max_rate;
484
485
486
487
488
489 if (!mmc_host_uhs(card->host))
490 return 0;
491
492 bus_speed = SDIO_SPEED_SDR12;
493 timing = MMC_TIMING_UHS_SDR12;
494 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
495 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
496 bus_speed = SDIO_SPEED_SDR104;
497 timing = MMC_TIMING_UHS_SDR104;
498 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
499 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
500 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
501 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
502 bus_speed = SDIO_SPEED_DDR50;
503 timing = MMC_TIMING_UHS_DDR50;
504 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
505 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
506 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
507 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
508 SD_MODE_UHS_SDR50)) {
509 bus_speed = SDIO_SPEED_SDR50;
510 timing = MMC_TIMING_UHS_SDR50;
511 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
512 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
513 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
514 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
515 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
516 bus_speed = SDIO_SPEED_SDR25;
517 timing = MMC_TIMING_UHS_SDR25;
518 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
519 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
520 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
521 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
522 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
523 SD_MODE_UHS_SDR12)) {
524 bus_speed = SDIO_SPEED_SDR12;
525 timing = MMC_TIMING_UHS_SDR12;
526 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
527 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
528 }
529
530 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
531 if (err)
532 return err;
533
534 speed &= ~SDIO_SPEED_BSS_MASK;
535 speed |= bus_speed;
536 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
537 if (err)
538 return err;
539
540 max_rate = min_not_zero(card->quirk_max_rate,
541 card->sw_caps.uhs_max_dtr);
542
543 mmc_set_timing(card->host, timing);
544 mmc_set_clock(card->host, max_rate);
545
546 return 0;
547}
548
549
550
551
552static int mmc_sdio_init_uhs_card(struct mmc_card *card)
553{
554 int err;
555
556 if (!card->scr.sda_spec3)
557 return 0;
558
559
560 err = sdio_enable_4bit_bus(card);
561 if (err)
562 goto out;
563
564
565 sdio_select_driver_type(card);
566
567
568 err = sdio_set_bus_speed_mode(card);
569 if (err)
570 goto out;
571
572
573
574
575
576 if (!mmc_host_is_spi(card->host) &&
577 ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
578 (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
579 err = mmc_execute_tuning(card);
580out:
581 return err;
582}
583
584static int mmc_sdio_pre_init(struct mmc_host *host, u32 ocr,
585 struct mmc_card *card)
586{
587 if (card)
588 mmc_remove_card(card);
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607 sdio_reset(host);
608 mmc_go_idle(host);
609 mmc_send_if_cond(host, ocr);
610 return mmc_send_io_op_cond(host, 0, NULL);
611}
612
613
614
615
616
617
618
619static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
620 struct mmc_card *oldcard)
621{
622 struct mmc_card *card;
623 int err;
624 int retries = 10;
625 u32 rocr = 0;
626 u32 ocr_card = ocr;
627
628 WARN_ON(!host->claimed);
629
630
631 if (mmc_host_uhs(host))
632 ocr |= R4_18V_PRESENT;
633
634try_again:
635 if (!retries) {
636 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
637 ocr &= ~R4_18V_PRESENT;
638 }
639
640
641
642
643 err = mmc_send_io_op_cond(host, ocr, &rocr);
644 if (err)
645 return err;
646
647
648
649
650 if (mmc_host_is_spi(host)) {
651 err = mmc_spi_set_crc(host, use_spi_crc);
652 if (err)
653 return err;
654 }
655
656
657
658
659 card = mmc_alloc_card(host, &sdio_type);
660 if (IS_ERR(card))
661 return PTR_ERR(card);
662
663 if ((rocr & R4_MEMORY_PRESENT) &&
664 mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) {
665 card->type = MMC_TYPE_SD_COMBO;
666
667 if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
668 memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
669 err = -ENOENT;
670 goto mismatch;
671 }
672 } else {
673 card->type = MMC_TYPE_SDIO;
674
675 if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
676 err = -ENOENT;
677 goto mismatch;
678 }
679 }
680
681
682
683
684 if (host->ops->init_card)
685 host->ops->init_card(host, card);
686
687
688
689
690
691
692
693
694
695
696
697
698 if (rocr & ocr & R4_18V_PRESENT) {
699 err = mmc_set_uhs_voltage(host, ocr_card);
700 if (err == -EAGAIN) {
701 mmc_sdio_pre_init(host, ocr_card, card);
702 retries--;
703 goto try_again;
704 } else if (err) {
705 ocr &= ~R4_18V_PRESENT;
706 }
707 }
708
709
710
711
712 if (!mmc_host_is_spi(host)) {
713 err = mmc_send_relative_addr(host, &card->rca);
714 if (err)
715 goto remove;
716
717
718
719
720
721
722 if (oldcard)
723 oldcard->rca = card->rca;
724 }
725
726
727
728
729 if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
730 err = mmc_sd_get_csd(host, card);
731 if (err)
732 goto remove;
733
734 mmc_decode_cid(card);
735 }
736
737
738
739
740 if (!mmc_host_is_spi(host)) {
741 err = mmc_select_card(card);
742 if (err)
743 goto remove;
744 }
745
746 if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
747
748
749
750
751
752
753 mmc_set_clock(host, card->cis.max_dtr);
754
755 if (card->cccr.high_speed) {
756 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
757 }
758
759 if (oldcard)
760 mmc_remove_card(card);
761 else
762 host->card = card;
763
764 return 0;
765 }
766
767
768
769
770
771 err = sdio_read_cccr(card, ocr);
772 if (err) {
773 mmc_sdio_pre_init(host, ocr_card, card);
774 if (ocr & R4_18V_PRESENT) {
775
776 retries = 0;
777 goto try_again;
778 }
779 return err;
780 }
781
782
783
784
785 err = sdio_read_common_cis(card);
786 if (err)
787 goto remove;
788
789 if (oldcard) {
790 if (card->cis.vendor == oldcard->cis.vendor &&
791 card->cis.device == oldcard->cis.device) {
792 mmc_remove_card(card);
793 card = oldcard;
794 } else {
795 err = -ENOENT;
796 goto mismatch;
797 }
798 }
799 card->ocr = ocr_card;
800 mmc_fixup_device(card, sdio_fixup_methods);
801
802 if (card->type == MMC_TYPE_SD_COMBO) {
803 err = mmc_sd_setup_card(host, card, oldcard != NULL);
804
805 if (err) {
806 mmc_go_idle(host);
807 if (mmc_host_is_spi(host))
808
809 mmc_spi_set_crc(host, use_spi_crc);
810 card->type = MMC_TYPE_SDIO;
811 } else
812 card->dev.type = &sd_type;
813 }
814
815
816
817
818 err = sdio_disable_cd(card);
819 if (err)
820 goto remove;
821
822
823
824 if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
825 err = mmc_sdio_init_uhs_card(card);
826 if (err)
827 goto remove;
828 } else {
829
830
831
832 err = sdio_enable_hs(card);
833 if (err > 0)
834 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
835 else if (err)
836 goto remove;
837
838
839
840
841 mmc_set_clock(host, mmc_sdio_get_max_clock(card));
842
843
844
845
846 err = sdio_enable_4bit_bus(card);
847 if (err)
848 goto remove;
849 }
850
851 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
852 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
853 pr_err("%s: Host failed to negotiate down from 3.3V\n",
854 mmc_hostname(host));
855 err = -EINVAL;
856 goto remove;
857 }
858
859 host->card = card;
860 return 0;
861
862mismatch:
863 pr_debug("%s: Perhaps the card was replaced\n", mmc_hostname(host));
864remove:
865 if (oldcard != card)
866 mmc_remove_card(card);
867 return err;
868}
869
870static int mmc_sdio_reinit_card(struct mmc_host *host)
871{
872 int ret;
873
874 ret = mmc_sdio_pre_init(host, host->card->ocr, NULL);
875 if (ret)
876 return ret;
877
878 return mmc_sdio_init_card(host, host->card->ocr, host->card);
879}
880
881
882
883
884static void mmc_sdio_remove(struct mmc_host *host)
885{
886 int i;
887
888 for (i = 0;i < host->card->sdio_funcs;i++) {
889 if (host->card->sdio_func[i]) {
890 sdio_remove_func(host->card->sdio_func[i]);
891 host->card->sdio_func[i] = NULL;
892 }
893 }
894
895 mmc_remove_card(host->card);
896 host->card = NULL;
897}
898
899
900
901
902static int mmc_sdio_alive(struct mmc_host *host)
903{
904 return mmc_select_card(host->card);
905}
906
907
908
909
910static void mmc_sdio_detect(struct mmc_host *host)
911{
912 int err;
913
914
915 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
916 err = pm_runtime_get_sync(&host->card->dev);
917 if (err < 0) {
918 pm_runtime_put_noidle(&host->card->dev);
919 goto out;
920 }
921 }
922
923 mmc_claim_host(host);
924
925
926
927
928 err = _mmc_detect_card_removed(host);
929
930 mmc_release_host(host);
931
932
933
934
935
936
937
938
939
940
941
942
943 if (host->caps & MMC_CAP_POWER_OFF_CARD)
944 pm_runtime_put_sync(&host->card->dev);
945
946out:
947 if (err) {
948 mmc_sdio_remove(host);
949
950 mmc_claim_host(host);
951 mmc_detach_bus(host);
952 mmc_power_off(host);
953 mmc_release_host(host);
954 }
955}
956
957
958
959
960
961
962static int mmc_sdio_pre_suspend(struct mmc_host *host)
963{
964 int i, err = 0;
965
966 for (i = 0; i < host->card->sdio_funcs; i++) {
967 struct sdio_func *func = host->card->sdio_func[i];
968 if (func && sdio_func_present(func) && func->dev.driver) {
969 const struct dev_pm_ops *pmops = func->dev.driver->pm;
970 if (!pmops || !pmops->suspend || !pmops->resume) {
971
972 err = -ENOSYS;
973 break;
974 }
975 }
976 }
977
978 return err;
979}
980
981
982
983
984static int mmc_sdio_suspend(struct mmc_host *host)
985{
986 WARN_ON(host->sdio_irqs && !mmc_card_keep_power(host));
987
988
989 mmc_card_set_suspended(host->card);
990 cancel_delayed_work_sync(&host->sdio_irq_work);
991
992 mmc_claim_host(host);
993
994 if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
995 sdio_disable_4bit_bus(host->card);
996
997 if (!mmc_card_keep_power(host)) {
998 mmc_power_off(host);
999 } else if (host->retune_period) {
1000 mmc_retune_timer_stop(host);
1001 mmc_retune_needed(host);
1002 }
1003
1004 mmc_release_host(host);
1005
1006 return 0;
1007}
1008
1009static int mmc_sdio_resume(struct mmc_host *host)
1010{
1011 int err = 0;
1012
1013
1014 mmc_claim_host(host);
1015
1016
1017
1018
1019
1020
1021 if (!mmc_card_keep_power(host)) {
1022 mmc_power_up(host, host->card->ocr);
1023
1024
1025
1026
1027
1028
1029 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
1030 pm_runtime_disable(&host->card->dev);
1031 pm_runtime_set_active(&host->card->dev);
1032 pm_runtime_enable(&host->card->dev);
1033 }
1034 err = mmc_sdio_reinit_card(host);
1035 } else if (mmc_card_wake_sdio_irq(host)) {
1036
1037 err = sdio_enable_4bit_bus(host->card);
1038 }
1039
1040 if (err)
1041 goto out;
1042
1043
1044 mmc_card_clr_suspended(host->card);
1045
1046 if (host->sdio_irqs) {
1047 if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
1048 wake_up_process(host->sdio_irq_thread);
1049 else if (host->caps & MMC_CAP_SDIO_IRQ)
1050 queue_delayed_work(system_wq, &host->sdio_irq_work, 0);
1051 }
1052
1053out:
1054 mmc_release_host(host);
1055
1056 host->pm_flags &= ~MMC_PM_KEEP_POWER;
1057 return err;
1058}
1059
1060static int mmc_sdio_runtime_suspend(struct mmc_host *host)
1061{
1062
1063 mmc_claim_host(host);
1064 mmc_power_off(host);
1065 mmc_release_host(host);
1066
1067 return 0;
1068}
1069
1070static int mmc_sdio_runtime_resume(struct mmc_host *host)
1071{
1072 int ret;
1073
1074
1075 mmc_claim_host(host);
1076 mmc_power_up(host, host->card->ocr);
1077 ret = mmc_sdio_reinit_card(host);
1078 mmc_release_host(host);
1079
1080 return ret;
1081}
1082
1083
1084
1085
1086
1087
1088
1089static int mmc_sdio_hw_reset(struct mmc_host *host)
1090{
1091 struct mmc_card *card = host->card;
1092
1093
1094
1095
1096
1097
1098 if (atomic_read(&card->sdio_funcs_probed) > 1) {
1099 if (mmc_card_removed(card))
1100 return 1;
1101 host->rescan_entered = 0;
1102 mmc_card_set_removed(card);
1103 _mmc_detect_change(host, 0, false);
1104 return 1;
1105 }
1106
1107
1108
1109
1110
1111 mmc_power_cycle(host, card->ocr);
1112 return mmc_sdio_reinit_card(host);
1113}
1114
1115static int mmc_sdio_sw_reset(struct mmc_host *host)
1116{
1117 mmc_set_clock(host, host->f_init);
1118 sdio_reset(host);
1119 mmc_go_idle(host);
1120
1121 mmc_set_initial_state(host);
1122 mmc_set_initial_signal_voltage(host);
1123
1124 return mmc_sdio_reinit_card(host);
1125}
1126
1127static const struct mmc_bus_ops mmc_sdio_ops = {
1128 .remove = mmc_sdio_remove,
1129 .detect = mmc_sdio_detect,
1130 .pre_suspend = mmc_sdio_pre_suspend,
1131 .suspend = mmc_sdio_suspend,
1132 .resume = mmc_sdio_resume,
1133 .runtime_suspend = mmc_sdio_runtime_suspend,
1134 .runtime_resume = mmc_sdio_runtime_resume,
1135 .alive = mmc_sdio_alive,
1136 .hw_reset = mmc_sdio_hw_reset,
1137 .sw_reset = mmc_sdio_sw_reset,
1138};
1139
1140
1141
1142
1143
1144int mmc_attach_sdio(struct mmc_host *host)
1145{
1146 int err, i, funcs;
1147 u32 ocr, rocr;
1148 struct mmc_card *card;
1149
1150 WARN_ON(!host->claimed);
1151
1152 err = mmc_send_io_op_cond(host, 0, &ocr);
1153 if (err)
1154 return err;
1155
1156 mmc_attach_bus(host, &mmc_sdio_ops);
1157 if (host->ocr_avail_sdio)
1158 host->ocr_avail = host->ocr_avail_sdio;
1159
1160
1161 rocr = mmc_select_voltage(host, ocr);
1162
1163
1164
1165
1166 if (!rocr) {
1167 err = -EINVAL;
1168 goto err;
1169 }
1170
1171
1172
1173
1174 err = mmc_sdio_init_card(host, rocr, NULL);
1175 if (err)
1176 goto err;
1177
1178 card = host->card;
1179
1180
1181
1182
1183 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
1184
1185
1186
1187
1188 pm_runtime_get_noresume(&card->dev);
1189
1190
1191
1192
1193 err = pm_runtime_set_active(&card->dev);
1194 if (err)
1195 goto remove;
1196
1197
1198
1199
1200 pm_runtime_enable(&card->dev);
1201 }
1202
1203
1204
1205
1206
1207 funcs = (ocr & 0x70000000) >> 28;
1208 card->sdio_funcs = 0;
1209
1210
1211
1212
1213 for (i = 0; i < funcs; i++, card->sdio_funcs++) {
1214 err = sdio_init_func(host->card, i + 1);
1215 if (err)
1216 goto remove;
1217
1218
1219
1220
1221 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1222 pm_runtime_enable(&card->sdio_func[i]->dev);
1223 }
1224
1225
1226
1227
1228 mmc_release_host(host);
1229 err = mmc_add_card(host->card);
1230 if (err)
1231 goto remove_added;
1232
1233
1234
1235
1236 for (i = 0;i < funcs;i++) {
1237 err = sdio_add_func(host->card->sdio_func[i]);
1238 if (err)
1239 goto remove_added;
1240 }
1241
1242 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1243 pm_runtime_put(&card->dev);
1244
1245 mmc_claim_host(host);
1246 return 0;
1247
1248
1249remove:
1250 mmc_release_host(host);
1251remove_added:
1252
1253
1254
1255
1256
1257
1258 mmc_sdio_remove(host);
1259 mmc_claim_host(host);
1260err:
1261 mmc_detach_bus(host);
1262
1263 pr_err("%s: error %d whilst initialising SDIO card\n",
1264 mmc_hostname(host), err);
1265
1266 return err;
1267}
1268
1269