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13#include <linux/err.h>
14#include <linux/sizes.h>
15#include <linux/slab.h>
16#include <linux/stat.h>
17#include <linux/pm_runtime.h>
18
19#include <linux/mmc/host.h>
20#include <linux/mmc/card.h>
21#include <linux/mmc/mmc.h>
22#include <linux/mmc/sd.h>
23
24#include "core.h"
25#include "bus.h"
26#include "mmc_ops.h"
27#include "sd.h"
28#include "sd_ops.h"
29
30static const unsigned int tran_exp[] = {
31 10000, 100000, 1000000, 10000000,
32 0, 0, 0, 0
33};
34
35static const unsigned char tran_mant[] = {
36 0, 10, 12, 13, 15, 20, 25, 30,
37 35, 40, 45, 50, 55, 60, 70, 80,
38};
39
40static const unsigned int tacc_exp[] = {
41 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
42};
43
44static const unsigned int tacc_mant[] = {
45 0, 10, 12, 13, 15, 20, 25, 30,
46 35, 40, 45, 50, 55, 60, 70, 80,
47};
48
49static const unsigned int sd_au_size[] = {
50 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512,
51 SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512,
52 SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
53 SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512,
54};
55
56#define UNSTUFF_BITS(resp,start,size) \
57 ({ \
58 const int __size = size; \
59 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
60 const int __off = 3 - ((start) / 32); \
61 const int __shft = (start) & 31; \
62 u32 __res; \
63 \
64 __res = resp[__off] >> __shft; \
65 if (__size + __shft > 32) \
66 __res |= resp[__off-1] << ((32 - __shft) % 32); \
67 __res & __mask; \
68 })
69
70
71
72
73void mmc_decode_cid(struct mmc_card *card)
74{
75 u32 *resp = card->raw_cid;
76
77 memset(&card->cid, 0, sizeof(struct mmc_cid));
78
79
80
81
82
83 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
84 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
85 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
86 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
87 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
88 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
89 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
90 card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
91 card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
92 card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
93 card->cid.year = UNSTUFF_BITS(resp, 12, 8);
94 card->cid.month = UNSTUFF_BITS(resp, 8, 4);
95
96 card->cid.year += 2000;
97}
98
99
100
101
102static int mmc_decode_csd(struct mmc_card *card)
103{
104 struct mmc_csd *csd = &card->csd;
105 unsigned int e, m, csd_struct;
106 u32 *resp = card->raw_csd;
107
108 csd_struct = UNSTUFF_BITS(resp, 126, 2);
109
110 switch (csd_struct) {
111 case 0:
112 m = UNSTUFF_BITS(resp, 115, 4);
113 e = UNSTUFF_BITS(resp, 112, 3);
114 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
115 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
116
117 m = UNSTUFF_BITS(resp, 99, 4);
118 e = UNSTUFF_BITS(resp, 96, 3);
119 csd->max_dtr = tran_exp[e] * tran_mant[m];
120 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
121
122 e = UNSTUFF_BITS(resp, 47, 3);
123 m = UNSTUFF_BITS(resp, 62, 12);
124 csd->capacity = (1 + m) << (e + 2);
125
126 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
127 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
128 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
129 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
130 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
131 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
132 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
133
134 if (UNSTUFF_BITS(resp, 46, 1)) {
135 csd->erase_size = 1;
136 } else if (csd->write_blkbits >= 9) {
137 csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
138 csd->erase_size <<= csd->write_blkbits - 9;
139 }
140 break;
141 case 1:
142
143
144
145
146
147
148 mmc_card_set_blockaddr(card);
149
150 csd->tacc_ns = 0;
151 csd->tacc_clks = 0;
152
153 m = UNSTUFF_BITS(resp, 99, 4);
154 e = UNSTUFF_BITS(resp, 96, 3);
155 csd->max_dtr = tran_exp[e] * tran_mant[m];
156 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
157 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
158
159
160 if (csd->c_size >= 0xFFFF)
161 mmc_card_set_ext_capacity(card);
162
163 m = UNSTUFF_BITS(resp, 48, 22);
164 csd->capacity = (1 + m) << 10;
165
166 csd->read_blkbits = 9;
167 csd->read_partial = 0;
168 csd->write_misalign = 0;
169 csd->read_misalign = 0;
170 csd->r2w_factor = 4;
171 csd->write_blkbits = 9;
172 csd->write_partial = 0;
173 csd->erase_size = 1;
174 break;
175 default:
176 pr_err("%s: unrecognised CSD structure version %d\n",
177 mmc_hostname(card->host), csd_struct);
178 return -EINVAL;
179 }
180
181 card->erase_size = csd->erase_size;
182
183 return 0;
184}
185
186
187
188
189static int mmc_decode_scr(struct mmc_card *card)
190{
191 struct sd_scr *scr = &card->scr;
192 unsigned int scr_struct;
193 u32 resp[4];
194
195 resp[3] = card->raw_scr[1];
196 resp[2] = card->raw_scr[0];
197
198 scr_struct = UNSTUFF_BITS(resp, 60, 4);
199 if (scr_struct != 0) {
200 pr_err("%s: unrecognised SCR structure version %d\n",
201 mmc_hostname(card->host), scr_struct);
202 return -EINVAL;
203 }
204
205 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
206 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
207 if (scr->sda_vsn == SCR_SPEC_VER_2)
208
209 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
210
211 if (UNSTUFF_BITS(resp, 55, 1))
212 card->erased_byte = 0xFF;
213 else
214 card->erased_byte = 0x0;
215
216 if (scr->sda_spec3)
217 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
218 return 0;
219}
220
221
222
223
224static int mmc_read_ssr(struct mmc_card *card)
225{
226 unsigned int au, es, et, eo;
227 int err, i;
228 u32 *ssr;
229
230 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
231 pr_warning("%s: card lacks mandatory SD Status "
232 "function.\n", mmc_hostname(card->host));
233 return 0;
234 }
235
236 ssr = kmalloc(64, GFP_KERNEL);
237 if (!ssr)
238 return -ENOMEM;
239
240 err = mmc_app_sd_status(card, ssr);
241 if (err) {
242 pr_warning("%s: problem reading SD Status "
243 "register.\n", mmc_hostname(card->host));
244 err = 0;
245 goto out;
246 }
247
248 for (i = 0; i < 16; i++)
249 ssr[i] = be32_to_cpu(ssr[i]);
250
251
252
253
254
255 au = UNSTUFF_BITS(ssr, 428 - 384, 4);
256 if (au) {
257 if (au <= 9 || card->scr.sda_spec3) {
258 card->ssr.au = sd_au_size[au];
259 es = UNSTUFF_BITS(ssr, 408 - 384, 16);
260 et = UNSTUFF_BITS(ssr, 402 - 384, 6);
261 if (es && et) {
262 eo = UNSTUFF_BITS(ssr, 400 - 384, 2);
263 card->ssr.erase_timeout = (et * 1000) / es;
264 card->ssr.erase_offset = eo * 1000;
265 }
266 } else {
267 pr_warning("%s: SD Status: Invalid Allocation Unit size.\n",
268 mmc_hostname(card->host));
269 }
270 }
271out:
272 kfree(ssr);
273 return err;
274}
275
276
277
278
279static int mmc_read_switch(struct mmc_card *card)
280{
281 int err;
282 u8 *status;
283
284 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
285 return 0;
286
287 if (!(card->csd.cmdclass & CCC_SWITCH)) {
288 pr_warning("%s: card lacks mandatory switch "
289 "function, performance might suffer.\n",
290 mmc_hostname(card->host));
291 return 0;
292 }
293
294 err = -EIO;
295
296 status = kmalloc(64, GFP_KERNEL);
297 if (!status) {
298 pr_err("%s: could not allocate a buffer for "
299 "switch capabilities.\n",
300 mmc_hostname(card->host));
301 return -ENOMEM;
302 }
303
304
305
306
307
308
309 err = mmc_sd_switch(card, 0, 0, 0, status);
310 if (err) {
311
312
313
314
315 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
316 goto out;
317
318 pr_warning("%s: problem reading Bus Speed modes.\n",
319 mmc_hostname(card->host));
320 err = 0;
321
322 goto out;
323 }
324
325 if (status[13] & SD_MODE_HIGH_SPEED)
326 card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
327
328 if (card->scr.sda_spec3) {
329 card->sw_caps.sd3_bus_mode = status[13];
330
331 card->sw_caps.sd3_drv_type = status[9];
332 }
333
334out:
335 kfree(status);
336
337 return err;
338}
339
340
341
342
343int mmc_sd_switch_hs(struct mmc_card *card)
344{
345 int err;
346 u8 *status;
347
348 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
349 return 0;
350
351 if (!(card->csd.cmdclass & CCC_SWITCH))
352 return 0;
353
354 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
355 return 0;
356
357 if (card->sw_caps.hs_max_dtr == 0)
358 return 0;
359
360 err = -EIO;
361
362 status = kmalloc(64, GFP_KERNEL);
363 if (!status) {
364 pr_err("%s: could not allocate a buffer for "
365 "switch capabilities.\n", mmc_hostname(card->host));
366 return -ENOMEM;
367 }
368
369 err = mmc_sd_switch(card, 1, 0, 1, status);
370 if (err)
371 goto out;
372
373 if ((status[16] & 0xF) != 1) {
374 pr_warning("%s: Problem switching card "
375 "into high-speed mode!\n",
376 mmc_hostname(card->host));
377 err = 0;
378 } else {
379 err = 1;
380 }
381
382out:
383 kfree(status);
384
385 return err;
386}
387
388static int sd_select_driver_type(struct mmc_card *card, u8 *status)
389{
390 int host_drv_type = SD_DRIVER_TYPE_B;
391 int card_drv_type = SD_DRIVER_TYPE_B;
392 int drive_strength;
393 int err;
394
395
396
397
398
399
400 if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
401 | MMC_CAP_DRIVER_TYPE_D)))
402 return 0;
403
404 if (!card->host->ops->select_drive_strength)
405 return 0;
406
407 if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
408 host_drv_type |= SD_DRIVER_TYPE_A;
409
410 if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
411 host_drv_type |= SD_DRIVER_TYPE_C;
412
413 if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
414 host_drv_type |= SD_DRIVER_TYPE_D;
415
416 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
417 card_drv_type |= SD_DRIVER_TYPE_A;
418
419 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
420 card_drv_type |= SD_DRIVER_TYPE_C;
421
422 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D)
423 card_drv_type |= SD_DRIVER_TYPE_D;
424
425
426
427
428
429
430
431 mmc_host_clk_hold(card->host);
432 drive_strength = card->host->ops->select_drive_strength(
433 card->sw_caps.uhs_max_dtr,
434 host_drv_type, card_drv_type);
435 mmc_host_clk_release(card->host);
436
437 err = mmc_sd_switch(card, 1, 2, drive_strength, status);
438 if (err)
439 return err;
440
441 if ((status[15] & 0xF) != drive_strength) {
442 pr_warning("%s: Problem setting drive strength!\n",
443 mmc_hostname(card->host));
444 return 0;
445 }
446
447 mmc_set_driver_type(card->host, drive_strength);
448
449 return 0;
450}
451
452static void sd_update_bus_speed_mode(struct mmc_card *card)
453{
454
455
456
457
458 if (!mmc_host_uhs(card->host)) {
459 card->sd_bus_speed = 0;
460 return;
461 }
462
463 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
464 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
465 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
466 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
467 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
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 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
473 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
474 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
475 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
476 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
477 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
478 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
479 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
480 SD_MODE_UHS_SDR12)) {
481 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
482 }
483}
484
485static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
486{
487 int err;
488 unsigned int timing = 0;
489
490 switch (card->sd_bus_speed) {
491 case UHS_SDR104_BUS_SPEED:
492 timing = MMC_TIMING_UHS_SDR104;
493 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
494 break;
495 case UHS_DDR50_BUS_SPEED:
496 timing = MMC_TIMING_UHS_DDR50;
497 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
498 break;
499 case UHS_SDR50_BUS_SPEED:
500 timing = MMC_TIMING_UHS_SDR50;
501 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
502 break;
503 case UHS_SDR25_BUS_SPEED:
504 timing = MMC_TIMING_UHS_SDR25;
505 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
506 break;
507 case UHS_SDR12_BUS_SPEED:
508 timing = MMC_TIMING_UHS_SDR12;
509 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
510 break;
511 default:
512 return 0;
513 }
514
515 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
516 if (err)
517 return err;
518
519 if ((status[16] & 0xF) != card->sd_bus_speed)
520 pr_warning("%s: Problem setting bus speed mode!\n",
521 mmc_hostname(card->host));
522 else {
523 mmc_set_timing(card->host, timing);
524 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
525 }
526
527 return 0;
528}
529
530
531static u32 sd_get_host_max_current(struct mmc_host *host)
532{
533 u32 voltage, max_current;
534
535 voltage = 1 << host->ios.vdd;
536 switch (voltage) {
537 case MMC_VDD_165_195:
538 max_current = host->max_current_180;
539 break;
540 case MMC_VDD_29_30:
541 case MMC_VDD_30_31:
542 max_current = host->max_current_300;
543 break;
544 case MMC_VDD_32_33:
545 case MMC_VDD_33_34:
546 max_current = host->max_current_330;
547 break;
548 default:
549 max_current = 0;
550 }
551
552 return max_current;
553}
554
555static int sd_set_current_limit(struct mmc_card *card, u8 *status)
556{
557 int current_limit = SD_SET_CURRENT_NO_CHANGE;
558 int err;
559 u32 max_current;
560
561
562
563
564
565
566 if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
567 (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
568 (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
569 return 0;
570
571
572
573
574
575 max_current = sd_get_host_max_current(card->host);
576
577
578
579
580
581
582
583
584
585 if (max_current >= 800)
586 current_limit = SD_SET_CURRENT_LIMIT_800;
587 else if (max_current >= 600)
588 current_limit = SD_SET_CURRENT_LIMIT_600;
589 else if (max_current >= 400)
590 current_limit = SD_SET_CURRENT_LIMIT_400;
591 else if (max_current >= 200)
592 current_limit = SD_SET_CURRENT_LIMIT_200;
593
594 if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
595 err = mmc_sd_switch(card, 1, 3, current_limit, status);
596 if (err)
597 return err;
598
599 if (((status[15] >> 4) & 0x0F) != current_limit)
600 pr_warning("%s: Problem setting current limit!\n",
601 mmc_hostname(card->host));
602
603 }
604
605 return 0;
606}
607
608
609
610
611static int mmc_sd_init_uhs_card(struct mmc_card *card)
612{
613 int err;
614 u8 *status;
615
616 if (!card->scr.sda_spec3)
617 return 0;
618
619 if (!(card->csd.cmdclass & CCC_SWITCH))
620 return 0;
621
622 status = kmalloc(64, GFP_KERNEL);
623 if (!status) {
624 pr_err("%s: could not allocate a buffer for "
625 "switch capabilities.\n", mmc_hostname(card->host));
626 return -ENOMEM;
627 }
628
629
630 if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
631 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
632 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
633 if (err)
634 goto out;
635
636 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
637 }
638
639
640
641
642
643 sd_update_bus_speed_mode(card);
644
645
646 err = sd_select_driver_type(card, status);
647 if (err)
648 goto out;
649
650
651 err = sd_set_current_limit(card, status);
652 if (err)
653 goto out;
654
655
656 err = sd_set_bus_speed_mode(card, status);
657 if (err)
658 goto out;
659
660
661
662
663
664 if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
665 (card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
666 card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) {
667 mmc_host_clk_hold(card->host);
668 err = card->host->ops->execute_tuning(card->host,
669 MMC_SEND_TUNING_BLOCK);
670 mmc_host_clk_release(card->host);
671 }
672
673out:
674 kfree(status);
675
676 return err;
677}
678
679MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
680 card->raw_cid[2], card->raw_cid[3]);
681MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
682 card->raw_csd[2], card->raw_csd[3]);
683MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
684MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
685MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
686MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
687MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
688MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
689MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
690MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
691MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
692MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
693
694
695static struct attribute *sd_std_attrs[] = {
696 &dev_attr_cid.attr,
697 &dev_attr_csd.attr,
698 &dev_attr_scr.attr,
699 &dev_attr_date.attr,
700 &dev_attr_erase_size.attr,
701 &dev_attr_preferred_erase_size.attr,
702 &dev_attr_fwrev.attr,
703 &dev_attr_hwrev.attr,
704 &dev_attr_manfid.attr,
705 &dev_attr_name.attr,
706 &dev_attr_oemid.attr,
707 &dev_attr_serial.attr,
708 NULL,
709};
710ATTRIBUTE_GROUPS(sd_std);
711
712struct device_type sd_type = {
713 .groups = sd_std_groups,
714};
715
716
717
718
719int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
720{
721 int err;
722 u32 max_current;
723 int retries = 10;
724 u32 pocr = ocr;
725
726try_again:
727 if (!retries) {
728 ocr &= ~SD_OCR_S18R;
729 pr_warning("%s: Skipping voltage switch\n",
730 mmc_hostname(host));
731 }
732
733
734
735
736
737
738
739 mmc_go_idle(host);
740
741
742
743
744
745
746
747 err = mmc_send_if_cond(host, ocr);
748 if (!err)
749 ocr |= SD_OCR_CCS;
750
751
752
753
754
755
756 if (retries && mmc_host_uhs(host))
757 ocr |= SD_OCR_S18R;
758
759
760
761
762
763 max_current = sd_get_host_max_current(host);
764 if (max_current > 150)
765 ocr |= SD_OCR_XPC;
766
767 err = mmc_send_app_op_cond(host, ocr, rocr);
768 if (err)
769 return err;
770
771
772
773
774
775 if (!mmc_host_is_spi(host) && rocr &&
776 ((*rocr & 0x41000000) == 0x41000000)) {
777 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
778 pocr);
779 if (err == -EAGAIN) {
780 retries--;
781 goto try_again;
782 } else if (err) {
783 retries = 0;
784 goto try_again;
785 }
786 }
787
788 if (mmc_host_is_spi(host))
789 err = mmc_send_cid(host, cid);
790 else
791 err = mmc_all_send_cid(host, cid);
792
793 return err;
794}
795
796int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card)
797{
798 int err;
799
800
801
802
803 err = mmc_send_csd(card, card->raw_csd);
804 if (err)
805 return err;
806
807 err = mmc_decode_csd(card);
808 if (err)
809 return err;
810
811 return 0;
812}
813
814int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
815 bool reinit)
816{
817 int err;
818
819 if (!reinit) {
820
821
822
823 err = mmc_app_send_scr(card, card->raw_scr);
824 if (err)
825 return err;
826
827 err = mmc_decode_scr(card);
828 if (err)
829 return err;
830
831
832
833
834 err = mmc_read_ssr(card);
835 if (err)
836 return err;
837
838
839 mmc_init_erase(card);
840
841
842
843
844 err = mmc_read_switch(card);
845 if (err)
846 return err;
847 }
848
849
850
851
852
853
854
855 if (mmc_host_is_spi(host)) {
856 err = mmc_spi_set_crc(host, use_spi_crc);
857 if (err)
858 return err;
859 }
860
861
862
863
864 if (!reinit) {
865 int ro = -1;
866
867 if (host->ops->get_ro) {
868 mmc_host_clk_hold(card->host);
869 ro = host->ops->get_ro(host);
870 mmc_host_clk_release(card->host);
871 }
872
873 if (ro < 0) {
874 pr_warning("%s: host does not "
875 "support reading read-only "
876 "switch. assuming write-enable.\n",
877 mmc_hostname(host));
878 } else if (ro > 0) {
879 mmc_card_set_readonly(card);
880 }
881 }
882
883 return 0;
884}
885
886unsigned mmc_sd_get_max_clock(struct mmc_card *card)
887{
888 unsigned max_dtr = (unsigned int)-1;
889
890 if (mmc_card_hs(card)) {
891 if (max_dtr > card->sw_caps.hs_max_dtr)
892 max_dtr = card->sw_caps.hs_max_dtr;
893 } else if (max_dtr > card->csd.max_dtr) {
894 max_dtr = card->csd.max_dtr;
895 }
896
897 return max_dtr;
898}
899
900
901
902
903
904
905
906static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
907 struct mmc_card *oldcard)
908{
909 struct mmc_card *card;
910 int err;
911 u32 cid[4];
912 u32 rocr = 0;
913
914 BUG_ON(!host);
915 WARN_ON(!host->claimed);
916
917 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
918 if (err)
919 return err;
920
921 if (oldcard) {
922 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
923 return -ENOENT;
924
925 card = oldcard;
926 } else {
927
928
929
930 card = mmc_alloc_card(host, &sd_type);
931 if (IS_ERR(card))
932 return PTR_ERR(card);
933
934 card->ocr = ocr;
935 card->type = MMC_TYPE_SD;
936 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
937 }
938
939
940
941
942 if (!mmc_host_is_spi(host)) {
943 err = mmc_send_relative_addr(host, &card->rca);
944 if (err)
945 goto free_card;
946 }
947
948 if (!oldcard) {
949 err = mmc_sd_get_csd(host, card);
950 if (err)
951 goto free_card;
952
953 mmc_decode_cid(card);
954 }
955
956
957
958
959 if (!mmc_host_is_spi(host)) {
960 err = mmc_select_card(card);
961 if (err)
962 goto free_card;
963 }
964
965 err = mmc_sd_setup_card(host, card, oldcard != NULL);
966 if (err)
967 goto free_card;
968
969
970 if (rocr & SD_ROCR_S18A) {
971 err = mmc_sd_init_uhs_card(card);
972 if (err)
973 goto free_card;
974 } else {
975
976
977
978 err = mmc_sd_switch_hs(card);
979 if (err > 0)
980 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
981 else if (err)
982 goto free_card;
983
984
985
986
987 mmc_set_clock(host, mmc_sd_get_max_clock(card));
988
989
990
991
992 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
993 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
994 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
995 if (err)
996 goto free_card;
997
998 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
999 }
1000 }
1001
1002 host->card = card;
1003 return 0;
1004
1005free_card:
1006 if (!oldcard)
1007 mmc_remove_card(card);
1008
1009 return err;
1010}
1011
1012
1013
1014
1015static void mmc_sd_remove(struct mmc_host *host)
1016{
1017 BUG_ON(!host);
1018 BUG_ON(!host->card);
1019
1020 mmc_remove_card(host->card);
1021 host->card = NULL;
1022}
1023
1024
1025
1026
1027static int mmc_sd_alive(struct mmc_host *host)
1028{
1029 return mmc_send_status(host->card, NULL);
1030}
1031
1032
1033
1034
1035static void mmc_sd_detect(struct mmc_host *host)
1036{
1037 int err;
1038
1039 BUG_ON(!host);
1040 BUG_ON(!host->card);
1041
1042 mmc_get_card(host->card);
1043
1044
1045
1046
1047 err = _mmc_detect_card_removed(host);
1048
1049 mmc_put_card(host->card);
1050
1051 if (err) {
1052 mmc_sd_remove(host);
1053
1054 mmc_claim_host(host);
1055 mmc_detach_bus(host);
1056 mmc_power_off(host);
1057 mmc_release_host(host);
1058 }
1059}
1060
1061static int _mmc_sd_suspend(struct mmc_host *host)
1062{
1063 int err = 0;
1064
1065 BUG_ON(!host);
1066 BUG_ON(!host->card);
1067
1068 mmc_claim_host(host);
1069
1070 if (mmc_card_suspended(host->card))
1071 goto out;
1072
1073 if (!mmc_host_is_spi(host))
1074 err = mmc_deselect_cards(host);
1075
1076 if (!err) {
1077 mmc_power_off(host);
1078 mmc_card_set_suspended(host->card);
1079 }
1080
1081out:
1082 mmc_release_host(host);
1083 return err;
1084}
1085
1086
1087
1088
1089static int mmc_sd_suspend(struct mmc_host *host)
1090{
1091 int err;
1092
1093 err = _mmc_sd_suspend(host);
1094 if (!err) {
1095 pm_runtime_disable(&host->card->dev);
1096 pm_runtime_set_suspended(&host->card->dev);
1097 }
1098
1099 return err;
1100}
1101
1102
1103
1104
1105
1106static int _mmc_sd_resume(struct mmc_host *host)
1107{
1108 int err = 0;
1109
1110 BUG_ON(!host);
1111 BUG_ON(!host->card);
1112
1113 mmc_claim_host(host);
1114
1115 if (!mmc_card_suspended(host->card))
1116 goto out;
1117
1118 mmc_power_up(host, host->card->ocr);
1119 err = mmc_sd_init_card(host, host->card->ocr, host->card);
1120 mmc_card_clr_suspended(host->card);
1121
1122out:
1123 mmc_release_host(host);
1124 return err;
1125}
1126
1127
1128
1129
1130static int mmc_sd_resume(struct mmc_host *host)
1131{
1132 int err = 0;
1133
1134 if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
1135 err = _mmc_sd_resume(host);
1136 pm_runtime_set_active(&host->card->dev);
1137 pm_runtime_mark_last_busy(&host->card->dev);
1138 }
1139 pm_runtime_enable(&host->card->dev);
1140
1141 return err;
1142}
1143
1144
1145
1146
1147static int mmc_sd_runtime_suspend(struct mmc_host *host)
1148{
1149 int err;
1150
1151 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1152 return 0;
1153
1154 err = _mmc_sd_suspend(host);
1155 if (err)
1156 pr_err("%s: error %d doing aggessive suspend\n",
1157 mmc_hostname(host), err);
1158
1159 return err;
1160}
1161
1162
1163
1164
1165static int mmc_sd_runtime_resume(struct mmc_host *host)
1166{
1167 int err;
1168
1169 if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
1170 return 0;
1171
1172 err = _mmc_sd_resume(host);
1173 if (err)
1174 pr_err("%s: error %d doing aggessive resume\n",
1175 mmc_hostname(host), err);
1176
1177 return 0;
1178}
1179
1180static int mmc_sd_power_restore(struct mmc_host *host)
1181{
1182 int ret;
1183
1184 mmc_claim_host(host);
1185 ret = mmc_sd_init_card(host, host->card->ocr, host->card);
1186 mmc_release_host(host);
1187
1188 return ret;
1189}
1190
1191static const struct mmc_bus_ops mmc_sd_ops = {
1192 .remove = mmc_sd_remove,
1193 .detect = mmc_sd_detect,
1194 .runtime_suspend = mmc_sd_runtime_suspend,
1195 .runtime_resume = mmc_sd_runtime_resume,
1196 .suspend = mmc_sd_suspend,
1197 .resume = mmc_sd_resume,
1198 .power_restore = mmc_sd_power_restore,
1199 .alive = mmc_sd_alive,
1200 .shutdown = mmc_sd_suspend,
1201};
1202
1203
1204
1205
1206int mmc_attach_sd(struct mmc_host *host)
1207{
1208 int err;
1209 u32 ocr, rocr;
1210
1211 BUG_ON(!host);
1212 WARN_ON(!host->claimed);
1213
1214 err = mmc_send_app_op_cond(host, 0, &ocr);
1215 if (err)
1216 return err;
1217
1218 mmc_attach_bus(host, &mmc_sd_ops);
1219 if (host->ocr_avail_sd)
1220 host->ocr_avail = host->ocr_avail_sd;
1221
1222
1223
1224
1225 if (mmc_host_is_spi(host)) {
1226 mmc_go_idle(host);
1227
1228 err = mmc_spi_read_ocr(host, 0, &ocr);
1229 if (err)
1230 goto err;
1231 }
1232
1233 rocr = mmc_select_voltage(host, ocr);
1234
1235
1236
1237
1238 if (!rocr) {
1239 err = -EINVAL;
1240 goto err;
1241 }
1242
1243
1244
1245
1246 err = mmc_sd_init_card(host, rocr, NULL);
1247 if (err)
1248 goto err;
1249
1250 mmc_release_host(host);
1251 err = mmc_add_card(host->card);
1252 mmc_claim_host(host);
1253 if (err)
1254 goto remove_card;
1255
1256 return 0;
1257
1258remove_card:
1259 mmc_release_host(host);
1260 mmc_remove_card(host->card);
1261 host->card = NULL;
1262 mmc_claim_host(host);
1263err:
1264 mmc_detach_bus(host);
1265
1266 pr_err("%s: error %d whilst initialising SD card\n",
1267 mmc_hostname(host), err);
1268
1269 return err;
1270}
1271
1272