1
2
3
4
5
6
7
8
9
10
11
12
13#include <linux/err.h>
14#include <linux/slab.h>
15#include <linux/stat.h>
16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20#include <linux/mmc/sd.h>
21
22#include "core.h"
23#include "bus.h"
24#include "mmc_ops.h"
25#include "sd.h"
26#include "sd_ops.h"
27
28static const unsigned int tran_exp[] = {
29 10000, 100000, 1000000, 10000000,
30 0, 0, 0, 0
31};
32
33static const unsigned char tran_mant[] = {
34 0, 10, 12, 13, 15, 20, 25, 30,
35 35, 40, 45, 50, 55, 60, 70, 80,
36};
37
38static const unsigned int tacc_exp[] = {
39 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
40};
41
42static const unsigned int tacc_mant[] = {
43 0, 10, 12, 13, 15, 20, 25, 30,
44 35, 40, 45, 50, 55, 60, 70, 80,
45};
46
47#define UNSTUFF_BITS(resp,start,size) \
48 ({ \
49 const int __size = size; \
50 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
51 const int __off = 3 - ((start) / 32); \
52 const int __shft = (start) & 31; \
53 u32 __res; \
54 \
55 __res = resp[__off] >> __shft; \
56 if (__size + __shft > 32) \
57 __res |= resp[__off-1] << ((32 - __shft) % 32); \
58 __res & __mask; \
59 })
60
61
62
63
64void mmc_decode_cid(struct mmc_card *card)
65{
66 u32 *resp = card->raw_cid;
67
68 memset(&card->cid, 0, sizeof(struct mmc_cid));
69
70
71
72
73
74 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
75 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
76 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
77 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
78 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
79 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
80 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
81 card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
82 card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
83 card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
84 card->cid.year = UNSTUFF_BITS(resp, 12, 8);
85 card->cid.month = UNSTUFF_BITS(resp, 8, 4);
86
87 card->cid.year += 2000;
88}
89
90
91
92
93static int mmc_decode_csd(struct mmc_card *card)
94{
95 struct mmc_csd *csd = &card->csd;
96 unsigned int e, m, csd_struct;
97 u32 *resp = card->raw_csd;
98
99 csd_struct = UNSTUFF_BITS(resp, 126, 2);
100
101 switch (csd_struct) {
102 case 0:
103 m = UNSTUFF_BITS(resp, 115, 4);
104 e = UNSTUFF_BITS(resp, 112, 3);
105 csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
106 csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
107
108 m = UNSTUFF_BITS(resp, 99, 4);
109 e = UNSTUFF_BITS(resp, 96, 3);
110 csd->max_dtr = tran_exp[e] * tran_mant[m];
111 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
112
113 e = UNSTUFF_BITS(resp, 47, 3);
114 m = UNSTUFF_BITS(resp, 62, 12);
115 csd->capacity = (1 + m) << (e + 2);
116
117 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
118 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
119 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
120 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
121 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
122 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
123 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
124
125 if (UNSTUFF_BITS(resp, 46, 1)) {
126 csd->erase_size = 1;
127 } else if (csd->write_blkbits >= 9) {
128 csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
129 csd->erase_size <<= csd->write_blkbits - 9;
130 }
131 break;
132 case 1:
133
134
135
136
137
138
139 mmc_card_set_blockaddr(card);
140
141 csd->tacc_ns = 0;
142 csd->tacc_clks = 0;
143
144 m = UNSTUFF_BITS(resp, 99, 4);
145 e = UNSTUFF_BITS(resp, 96, 3);
146 csd->max_dtr = tran_exp[e] * tran_mant[m];
147 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
148 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
149
150
151 if (csd->c_size >= 0xFFFF)
152 mmc_card_set_ext_capacity(card);
153
154 m = UNSTUFF_BITS(resp, 48, 22);
155 csd->capacity = (1 + m) << 10;
156
157 csd->read_blkbits = 9;
158 csd->read_partial = 0;
159 csd->write_misalign = 0;
160 csd->read_misalign = 0;
161 csd->r2w_factor = 4;
162 csd->write_blkbits = 9;
163 csd->write_partial = 0;
164 csd->erase_size = 1;
165 break;
166 default:
167 pr_err("%s: unrecognised CSD structure version %d\n",
168 mmc_hostname(card->host), csd_struct);
169 return -EINVAL;
170 }
171
172 card->erase_size = csd->erase_size;
173
174 return 0;
175}
176
177
178
179
180static int mmc_decode_scr(struct mmc_card *card)
181{
182 struct sd_scr *scr = &card->scr;
183 unsigned int scr_struct;
184 u32 resp[4];
185
186 resp[3] = card->raw_scr[1];
187 resp[2] = card->raw_scr[0];
188
189 scr_struct = UNSTUFF_BITS(resp, 60, 4);
190 if (scr_struct != 0) {
191 pr_err("%s: unrecognised SCR structure version %d\n",
192 mmc_hostname(card->host), scr_struct);
193 return -EINVAL;
194 }
195
196 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
197 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
198 if (scr->sda_vsn == SCR_SPEC_VER_2)
199
200 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
201
202 if (UNSTUFF_BITS(resp, 55, 1))
203 card->erased_byte = 0xFF;
204 else
205 card->erased_byte = 0x0;
206
207 if (scr->sda_spec3)
208 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
209 return 0;
210}
211
212
213
214
215static int mmc_read_ssr(struct mmc_card *card)
216{
217 unsigned int au, es, et, eo;
218 int err, i;
219 u32 *ssr;
220
221 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
222 pr_warning("%s: card lacks mandatory SD Status "
223 "function.\n", mmc_hostname(card->host));
224 return 0;
225 }
226
227 ssr = kmalloc(64, GFP_KERNEL);
228 if (!ssr)
229 return -ENOMEM;
230
231 err = mmc_app_sd_status(card, ssr);
232 if (err) {
233 pr_warning("%s: problem reading SD Status "
234 "register.\n", mmc_hostname(card->host));
235 err = 0;
236 goto out;
237 }
238
239 for (i = 0; i < 16; i++)
240 ssr[i] = be32_to_cpu(ssr[i]);
241
242
243
244
245
246 au = UNSTUFF_BITS(ssr, 428 - 384, 4);
247 if (au > 0 || au <= 9) {
248 card->ssr.au = 1 << (au + 4);
249 es = UNSTUFF_BITS(ssr, 408 - 384, 16);
250 et = UNSTUFF_BITS(ssr, 402 - 384, 6);
251 eo = UNSTUFF_BITS(ssr, 400 - 384, 2);
252 if (es && et) {
253 card->ssr.erase_timeout = (et * 1000) / es;
254 card->ssr.erase_offset = eo * 1000;
255 }
256 } else {
257 pr_warning("%s: SD Status: Invalid Allocation Unit "
258 "size.\n", mmc_hostname(card->host));
259 }
260out:
261 kfree(ssr);
262 return err;
263}
264
265
266
267
268static int mmc_read_switch(struct mmc_card *card)
269{
270 int err;
271 u8 *status;
272
273 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
274 return 0;
275
276 if (!(card->csd.cmdclass & CCC_SWITCH)) {
277 pr_warning("%s: card lacks mandatory switch "
278 "function, performance might suffer.\n",
279 mmc_hostname(card->host));
280 return 0;
281 }
282
283 err = -EIO;
284
285 status = kmalloc(64, GFP_KERNEL);
286 if (!status) {
287 pr_err("%s: could not allocate a buffer for "
288 "switch capabilities.\n",
289 mmc_hostname(card->host));
290 return -ENOMEM;
291 }
292
293
294 err = mmc_sd_switch(card, 0, 0, 1, status);
295 if (err) {
296
297
298
299
300 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
301 goto out;
302
303 pr_warning("%s: problem reading Bus Speed modes.\n",
304 mmc_hostname(card->host));
305 err = 0;
306
307 goto out;
308 }
309
310 if (status[13] & UHS_SDR50_BUS_SPEED)
311 card->sw_caps.hs_max_dtr = 50000000;
312
313 if (card->scr.sda_spec3) {
314 card->sw_caps.sd3_bus_mode = status[13];
315
316
317 err = mmc_sd_switch(card, 0, 2, 1, status);
318 if (err) {
319
320
321
322
323 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
324 goto out;
325
326 pr_warning("%s: problem reading "
327 "Driver Strength.\n",
328 mmc_hostname(card->host));
329 err = 0;
330
331 goto out;
332 }
333
334 card->sw_caps.sd3_drv_type = status[9];
335
336
337 err = mmc_sd_switch(card, 0, 3, 1, status);
338 if (err) {
339
340
341
342
343 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
344 goto out;
345
346 pr_warning("%s: problem reading "
347 "Current Limit.\n",
348 mmc_hostname(card->host));
349 err = 0;
350
351 goto out;
352 }
353
354 card->sw_caps.sd3_curr_limit = status[7];
355 }
356
357out:
358 kfree(status);
359
360 return err;
361}
362
363
364
365
366int mmc_sd_switch_hs(struct mmc_card *card)
367{
368 int err;
369 u8 *status;
370
371 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
372 return 0;
373
374 if (!(card->csd.cmdclass & CCC_SWITCH))
375 return 0;
376
377 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
378 return 0;
379
380 if (card->sw_caps.hs_max_dtr == 0)
381 return 0;
382
383 err = -EIO;
384
385 status = kmalloc(64, GFP_KERNEL);
386 if (!status) {
387 pr_err("%s: could not allocate a buffer for "
388 "switch capabilities.\n", mmc_hostname(card->host));
389 return -ENOMEM;
390 }
391
392 err = mmc_sd_switch(card, 1, 0, 1, status);
393 if (err)
394 goto out;
395
396 if ((status[16] & 0xF) != 1) {
397 pr_warning("%s: Problem switching card "
398 "into high-speed mode!\n",
399 mmc_hostname(card->host));
400 err = 0;
401 } else {
402 err = 1;
403 }
404
405out:
406 kfree(status);
407
408 return err;
409}
410
411static int sd_select_driver_type(struct mmc_card *card, u8 *status)
412{
413 int host_drv_type = SD_DRIVER_TYPE_B;
414 int card_drv_type = SD_DRIVER_TYPE_B;
415 int drive_strength;
416 int err;
417
418
419
420
421
422
423 if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
424 | MMC_CAP_DRIVER_TYPE_D)))
425 return 0;
426
427 if (!card->host->ops->select_drive_strength)
428 return 0;
429
430 if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
431 host_drv_type |= SD_DRIVER_TYPE_A;
432
433 if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
434 host_drv_type |= SD_DRIVER_TYPE_C;
435
436 if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
437 host_drv_type |= SD_DRIVER_TYPE_D;
438
439 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
440 card_drv_type |= SD_DRIVER_TYPE_A;
441
442 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
443 card_drv_type |= SD_DRIVER_TYPE_C;
444
445 if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D)
446 card_drv_type |= SD_DRIVER_TYPE_D;
447
448
449
450
451
452
453
454 drive_strength = card->host->ops->select_drive_strength(
455 card->sw_caps.uhs_max_dtr,
456 host_drv_type, card_drv_type);
457
458 err = mmc_sd_switch(card, 1, 2, drive_strength, status);
459 if (err)
460 return err;
461
462 if ((status[15] & 0xF) != drive_strength) {
463 pr_warning("%s: Problem setting drive strength!\n",
464 mmc_hostname(card->host));
465 return 0;
466 }
467
468 mmc_set_driver_type(card->host, drive_strength);
469
470 return 0;
471}
472
473static void sd_update_bus_speed_mode(struct mmc_card *card)
474{
475
476
477
478
479 if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
480 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))) {
481 card->sd_bus_speed = 0;
482 return;
483 }
484
485 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
486 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
487 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
488 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
489 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
490 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
491 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
492 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
493 SD_MODE_UHS_SDR50)) {
494 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
495 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
496 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
497 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
498 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
499 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
500 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
501 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
502 SD_MODE_UHS_SDR12)) {
503 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
504 }
505}
506
507static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
508{
509 int err;
510 unsigned int timing = 0;
511
512 switch (card->sd_bus_speed) {
513 case UHS_SDR104_BUS_SPEED:
514 timing = MMC_TIMING_UHS_SDR104;
515 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
516 break;
517 case UHS_DDR50_BUS_SPEED:
518 timing = MMC_TIMING_UHS_DDR50;
519 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
520 break;
521 case UHS_SDR50_BUS_SPEED:
522 timing = MMC_TIMING_UHS_SDR50;
523 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
524 break;
525 case UHS_SDR25_BUS_SPEED:
526 timing = MMC_TIMING_UHS_SDR25;
527 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
528 break;
529 case UHS_SDR12_BUS_SPEED:
530 timing = MMC_TIMING_UHS_SDR12;
531 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
532 break;
533 default:
534 return 0;
535 }
536
537 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
538 if (err)
539 return err;
540
541 if ((status[16] & 0xF) != card->sd_bus_speed)
542 pr_warning("%s: Problem setting bus speed mode!\n",
543 mmc_hostname(card->host));
544 else {
545 mmc_set_timing(card->host, timing);
546 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
547 }
548
549 return 0;
550}
551
552static int sd_set_current_limit(struct mmc_card *card, u8 *status)
553{
554 int current_limit = 0;
555 int err;
556
557
558
559
560
561
562 if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
563 (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
564 (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
565 if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
566 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
567 current_limit = SD_SET_CURRENT_LIMIT_800;
568 else if (card->sw_caps.sd3_curr_limit &
569 SD_MAX_CURRENT_600)
570 current_limit = SD_SET_CURRENT_LIMIT_600;
571 else if (card->sw_caps.sd3_curr_limit &
572 SD_MAX_CURRENT_400)
573 current_limit = SD_SET_CURRENT_LIMIT_400;
574 else if (card->sw_caps.sd3_curr_limit &
575 SD_MAX_CURRENT_200)
576 current_limit = SD_SET_CURRENT_LIMIT_200;
577 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
578 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
579 current_limit = SD_SET_CURRENT_LIMIT_600;
580 else if (card->sw_caps.sd3_curr_limit &
581 SD_MAX_CURRENT_400)
582 current_limit = SD_SET_CURRENT_LIMIT_400;
583 else if (card->sw_caps.sd3_curr_limit &
584 SD_MAX_CURRENT_200)
585 current_limit = SD_SET_CURRENT_LIMIT_200;
586 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
587 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
588 current_limit = SD_SET_CURRENT_LIMIT_400;
589 else if (card->sw_caps.sd3_curr_limit &
590 SD_MAX_CURRENT_200)
591 current_limit = SD_SET_CURRENT_LIMIT_200;
592 } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
593 if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
594 current_limit = SD_SET_CURRENT_LIMIT_200;
595 }
596 } else
597 current_limit = SD_SET_CURRENT_LIMIT_200;
598
599 err = mmc_sd_switch(card, 1, 3, current_limit, status);
600 if (err)
601 return err;
602
603 if (((status[15] >> 4) & 0x0F) != current_limit)
604 pr_warning("%s: Problem setting current limit!\n",
605 mmc_hostname(card->host));
606
607 return 0;
608}
609
610
611
612
613static int mmc_sd_init_uhs_card(struct mmc_card *card)
614{
615 int err;
616 u8 *status;
617
618 if (!card->scr.sda_spec3)
619 return 0;
620
621 if (!(card->csd.cmdclass & CCC_SWITCH))
622 return 0;
623
624 status = kmalloc(64, GFP_KERNEL);
625 if (!status) {
626 pr_err("%s: could not allocate a buffer for "
627 "switch capabilities.\n", mmc_hostname(card->host));
628 return -ENOMEM;
629 }
630
631
632 if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
633 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
634 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
635 if (err)
636 goto out;
637
638 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
639 }
640
641
642
643
644
645 sd_update_bus_speed_mode(card);
646
647
648 err = sd_select_driver_type(card, status);
649 if (err)
650 goto out;
651
652
653 err = sd_set_current_limit(card, status);
654 if (err)
655 goto out;
656
657
658 err = sd_set_bus_speed_mode(card, status);
659 if (err)
660 goto out;
661
662
663 if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
664 err = card->host->ops->execute_tuning(card->host);
665
666out:
667 kfree(status);
668
669 return err;
670}
671
672MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
673 card->raw_cid[2], card->raw_cid[3]);
674MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
675 card->raw_csd[2], card->raw_csd[3]);
676MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
677MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
678MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
679MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
680MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
681MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
682MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
683MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
684MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
685MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
686
687
688static struct attribute *sd_std_attrs[] = {
689 &dev_attr_cid.attr,
690 &dev_attr_csd.attr,
691 &dev_attr_scr.attr,
692 &dev_attr_date.attr,
693 &dev_attr_erase_size.attr,
694 &dev_attr_preferred_erase_size.attr,
695 &dev_attr_fwrev.attr,
696 &dev_attr_hwrev.attr,
697 &dev_attr_manfid.attr,
698 &dev_attr_name.attr,
699 &dev_attr_oemid.attr,
700 &dev_attr_serial.attr,
701 NULL,
702};
703
704static struct attribute_group sd_std_attr_group = {
705 .attrs = sd_std_attrs,
706};
707
708static const struct attribute_group *sd_attr_groups[] = {
709 &sd_std_attr_group,
710 NULL,
711};
712
713struct device_type sd_type = {
714 .groups = sd_attr_groups,
715};
716
717
718
719
720int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
721{
722 int err;
723
724
725
726
727
728
729
730 mmc_go_idle(host);
731
732
733
734
735
736
737
738 err = mmc_send_if_cond(host, ocr);
739 if (!err)
740 ocr |= SD_OCR_CCS;
741
742
743
744
745
746 if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
747 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
748 ocr |= SD_OCR_S18R;
749
750
751 if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
752 MMC_CAP_SET_XPC_180))
753 ocr |= SD_OCR_XPC;
754
755try_again:
756 err = mmc_send_app_op_cond(host, ocr, rocr);
757 if (err)
758 return err;
759
760
761
762
763
764 if (!mmc_host_is_spi(host) && rocr &&
765 ((*rocr & 0x41000000) == 0x41000000)) {
766 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true);
767 if (err) {
768 ocr &= ~SD_OCR_S18R;
769 goto try_again;
770 }
771 }
772
773 if (mmc_host_is_spi(host))
774 err = mmc_send_cid(host, cid);
775 else
776 err = mmc_all_send_cid(host, cid);
777
778 return err;
779}
780
781int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card)
782{
783 int err;
784
785
786
787
788 err = mmc_send_csd(card, card->raw_csd);
789 if (err)
790 return err;
791
792 err = mmc_decode_csd(card);
793 if (err)
794 return err;
795
796 return 0;
797}
798
799int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
800 bool reinit)
801{
802 int err;
803
804 if (!reinit) {
805
806
807
808 err = mmc_app_send_scr(card, card->raw_scr);
809 if (err)
810 return err;
811
812 err = mmc_decode_scr(card);
813 if (err)
814 return err;
815
816
817
818
819 err = mmc_read_ssr(card);
820 if (err)
821 return err;
822
823
824 mmc_init_erase(card);
825
826
827
828
829 err = mmc_read_switch(card);
830 if (err)
831 return err;
832 }
833
834
835
836
837
838
839
840 if (mmc_host_is_spi(host)) {
841 err = mmc_spi_set_crc(host, use_spi_crc);
842 if (err)
843 return err;
844 }
845
846
847
848
849 if (!reinit) {
850 int ro = -1;
851
852 if (host->ops->get_ro)
853 ro = host->ops->get_ro(host);
854
855 if (ro < 0) {
856 pr_warning("%s: host does not "
857 "support reading read-only "
858 "switch. assuming write-enable.\n",
859 mmc_hostname(host));
860 } else if (ro > 0) {
861 mmc_card_set_readonly(card);
862 }
863 }
864
865 return 0;
866}
867
868unsigned mmc_sd_get_max_clock(struct mmc_card *card)
869{
870 unsigned max_dtr = (unsigned int)-1;
871
872 if (mmc_card_highspeed(card)) {
873 if (max_dtr > card->sw_caps.hs_max_dtr)
874 max_dtr = card->sw_caps.hs_max_dtr;
875 } else if (max_dtr > card->csd.max_dtr) {
876 max_dtr = card->csd.max_dtr;
877 }
878
879 return max_dtr;
880}
881
882void mmc_sd_go_highspeed(struct mmc_card *card)
883{
884 mmc_card_set_highspeed(card);
885 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
886}
887
888
889
890
891
892
893
894static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
895 struct mmc_card *oldcard)
896{
897 struct mmc_card *card;
898 int err;
899 u32 cid[4];
900 u32 rocr = 0;
901
902 BUG_ON(!host);
903 WARN_ON(!host->claimed);
904
905 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
906 if (err)
907 return err;
908
909 if (oldcard) {
910 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
911 return -ENOENT;
912
913 card = oldcard;
914 } else {
915
916
917
918 card = mmc_alloc_card(host, &sd_type);
919 if (IS_ERR(card))
920 return PTR_ERR(card);
921
922 card->type = MMC_TYPE_SD;
923 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
924 }
925
926
927
928
929 if (!mmc_host_is_spi(host)) {
930 err = mmc_send_relative_addr(host, &card->rca);
931 if (err)
932 return err;
933 }
934
935 if (!oldcard) {
936 err = mmc_sd_get_csd(host, card);
937 if (err)
938 return err;
939
940 mmc_decode_cid(card);
941 }
942
943
944
945
946 if (!mmc_host_is_spi(host)) {
947 err = mmc_select_card(card);
948 if (err)
949 return err;
950 }
951
952 err = mmc_sd_setup_card(host, card, oldcard != NULL);
953 if (err)
954 goto free_card;
955
956
957 if (rocr & SD_ROCR_S18A) {
958 err = mmc_sd_init_uhs_card(card);
959 if (err)
960 goto free_card;
961
962
963 mmc_sd_card_set_uhs(card);
964
965
966
967
968
969 if (host->ops->enable_preset_value)
970 host->ops->enable_preset_value(host, true);
971 } else {
972
973
974
975 err = mmc_sd_switch_hs(card);
976 if (err > 0)
977 mmc_sd_go_highspeed(card);
978 else if (err)
979 goto free_card;
980
981
982
983
984 mmc_set_clock(host, mmc_sd_get_max_clock(card));
985
986
987
988
989 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
990 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
991 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
992 if (err)
993 goto free_card;
994
995 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
996 }
997 }
998
999 host->card = card;
1000 return 0;
1001
1002free_card:
1003 if (!oldcard)
1004 mmc_remove_card(card);
1005
1006 return err;
1007}
1008
1009
1010
1011
1012static void mmc_sd_remove(struct mmc_host *host)
1013{
1014 BUG_ON(!host);
1015 BUG_ON(!host->card);
1016
1017 mmc_remove_card(host->card);
1018 host->card = NULL;
1019}
1020
1021
1022
1023
1024static void mmc_sd_detect(struct mmc_host *host)
1025{
1026 int err;
1027
1028 BUG_ON(!host);
1029 BUG_ON(!host->card);
1030
1031 mmc_claim_host(host);
1032
1033
1034
1035
1036 err = mmc_send_status(host->card, NULL);
1037
1038 mmc_release_host(host);
1039
1040 if (err) {
1041 mmc_sd_remove(host);
1042
1043 mmc_claim_host(host);
1044 mmc_detach_bus(host);
1045 mmc_power_off(host);
1046 mmc_release_host(host);
1047 }
1048}
1049
1050
1051
1052
1053static int mmc_sd_suspend(struct mmc_host *host)
1054{
1055 BUG_ON(!host);
1056 BUG_ON(!host->card);
1057
1058 mmc_claim_host(host);
1059 if (!mmc_host_is_spi(host))
1060 mmc_deselect_cards(host);
1061 host->card->state &= ~MMC_STATE_HIGHSPEED;
1062 mmc_release_host(host);
1063
1064 return 0;
1065}
1066
1067
1068
1069
1070
1071
1072
1073static int mmc_sd_resume(struct mmc_host *host)
1074{
1075 int err;
1076
1077 BUG_ON(!host);
1078 BUG_ON(!host->card);
1079
1080 mmc_claim_host(host);
1081 err = mmc_sd_init_card(host, host->ocr, host->card);
1082 mmc_release_host(host);
1083
1084 return err;
1085}
1086
1087static int mmc_sd_power_restore(struct mmc_host *host)
1088{
1089 int ret;
1090
1091 host->card->state &= ~MMC_STATE_HIGHSPEED;
1092 mmc_claim_host(host);
1093 ret = mmc_sd_init_card(host, host->ocr, host->card);
1094 mmc_release_host(host);
1095
1096 return ret;
1097}
1098
1099static const struct mmc_bus_ops mmc_sd_ops = {
1100 .remove = mmc_sd_remove,
1101 .detect = mmc_sd_detect,
1102 .suspend = NULL,
1103 .resume = NULL,
1104 .power_restore = mmc_sd_power_restore,
1105};
1106
1107static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
1108 .remove = mmc_sd_remove,
1109 .detect = mmc_sd_detect,
1110 .suspend = mmc_sd_suspend,
1111 .resume = mmc_sd_resume,
1112 .power_restore = mmc_sd_power_restore,
1113};
1114
1115static void mmc_sd_attach_bus_ops(struct mmc_host *host)
1116{
1117 const struct mmc_bus_ops *bus_ops;
1118
1119 if (!mmc_card_is_removable(host))
1120 bus_ops = &mmc_sd_ops_unsafe;
1121 else
1122 bus_ops = &mmc_sd_ops;
1123 mmc_attach_bus(host, bus_ops);
1124}
1125
1126
1127
1128
1129int mmc_attach_sd(struct mmc_host *host)
1130{
1131 int err;
1132 u32 ocr;
1133
1134 BUG_ON(!host);
1135 WARN_ON(!host->claimed);
1136
1137
1138 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false);
1139 if (err)
1140 return err;
1141
1142
1143 if (host->ops->enable_preset_value)
1144 host->ops->enable_preset_value(host, false);
1145
1146 err = mmc_send_app_op_cond(host, 0, &ocr);
1147 if (err)
1148 return err;
1149
1150 mmc_sd_attach_bus_ops(host);
1151 if (host->ocr_avail_sd)
1152 host->ocr_avail = host->ocr_avail_sd;
1153
1154
1155
1156
1157 if (mmc_host_is_spi(host)) {
1158 mmc_go_idle(host);
1159
1160 err = mmc_spi_read_ocr(host, 0, &ocr);
1161 if (err)
1162 goto err;
1163 }
1164
1165
1166
1167
1168
1169 if (ocr & 0x7F) {
1170 pr_warning("%s: card claims to support voltages "
1171 "below the defined range. These will be ignored.\n",
1172 mmc_hostname(host));
1173 ocr &= ~0x7F;
1174 }
1175
1176 if ((ocr & MMC_VDD_165_195) &&
1177 !(host->ocr_avail_sd & MMC_VDD_165_195)) {
1178 pr_warning("%s: SD card claims to support the "
1179 "incompletely defined 'low voltage range'. This "
1180 "will be ignored.\n", mmc_hostname(host));
1181 ocr &= ~MMC_VDD_165_195;
1182 }
1183
1184 host->ocr = mmc_select_voltage(host, ocr);
1185
1186
1187
1188
1189 if (!host->ocr) {
1190 err = -EINVAL;
1191 goto err;
1192 }
1193
1194
1195
1196
1197 err = mmc_sd_init_card(host, host->ocr, NULL);
1198 if (err)
1199 goto err;
1200
1201 mmc_release_host(host);
1202 err = mmc_add_card(host->card);
1203 mmc_claim_host(host);
1204 if (err)
1205 goto remove_card;
1206
1207 return 0;
1208
1209remove_card:
1210 mmc_release_host(host);
1211 mmc_remove_card(host->card);
1212 host->card = NULL;
1213 mmc_claim_host(host);
1214err:
1215 mmc_detach_bus(host);
1216
1217 pr_err("%s: error %d whilst initialising SD card\n",
1218 mmc_hostname(host), err);
1219
1220 return err;
1221}
1222
1223