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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / mmc / core / sd.c
blob6f054c449d467537f3d52338510ef81eaecf86a9
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/mmc/core/sd.c
4 *
5 * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
6 * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
7 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
8 */
9
10 #include <linux/err.h>
11 #include <linux/sizes.h>
12 #include <linux/slab.h>
13 #include <linux/stat.h>
14 #include <linux/pm_runtime.h>
15
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
19 #include <linux/mmc/sd.h>
20
21 #include "core.h"
22 #include "card.h"
23 #include "host.h"
24 #include "bus.h"
25 #include "mmc_ops.h"
26 #include "sd.h"
27 #include "sd_ops.h"
28
29 static const unsigned int tran_exp[] = {
30 10000, 100000, 1000000, 10000000,
31 0, 0, 0, 0
32 };
33
34 static const unsigned char tran_mant[] = {
35 0, 10, 12, 13, 15, 20, 25, 30,
36 35, 40, 45, 50, 55, 60, 70, 80,
37 };
38
39 static const unsigned int taac_exp[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
41 };
42
43 static const unsigned int taac_mant[] = {
44 0, 10, 12, 13, 15, 20, 25, 30,
45 35, 40, 45, 50, 55, 60, 70, 80,
46 };
47
48 static const unsigned int sd_au_size[] = {
49 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512,
50 SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512,
51 SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
52 SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512,
53 };
54
55 #define UNSTUFF_BITS(resp,start,size) \
56 ({ \
57 const int __size = size; \
58 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
59 const int __off = 3 - ((start) / 32); \
60 const int __shft = (start) & 31; \
61 u32 __res; \
62 \
63 __res = resp[__off] >> __shft; \
64 if (__size + __shft > 32) \
65 __res |= resp[__off-1] << ((32 - __shft) % 32); \
66 __res & __mask; \
67 })
68
69 /*
70 * Given the decoded CSD structure, decode the raw CID to our CID structure.
71 */
72 void mmc_decode_cid(struct mmc_card *card)
73 {
74 u32 *resp = card->raw_cid;
75
76 /*
77 * SD doesn't currently have a version field so we will
78 * have to assume we can parse this.
79 */
80 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
81 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
82 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
83 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
84 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
85 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
86 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
87 card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
88 card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
89 card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
90 card->cid.year = UNSTUFF_BITS(resp, 12, 8);
91 card->cid.month = UNSTUFF_BITS(resp, 8, 4);
92
93 card->cid.year += 2000; /* SD cards year offset */
94 }
95
96 /*
97 * Given a 128-bit response, decode to our card CSD structure.
98 */
99 static int mmc_decode_csd(struct mmc_card *card)
100 {
101 struct mmc_csd *csd = &card->csd;
102 unsigned int e, m, csd_struct;
103 u32 *resp = card->raw_csd;
104
105 csd_struct = UNSTUFF_BITS(resp, 126, 2);
106
107 switch (csd_struct) {
108 case 0:
109 m = UNSTUFF_BITS(resp, 115, 4);
110 e = UNSTUFF_BITS(resp, 112, 3);
111 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
112 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
113
114 m = UNSTUFF_BITS(resp, 99, 4);
115 e = UNSTUFF_BITS(resp, 96, 3);
116 csd->max_dtr = tran_exp[e] * tran_mant[m];
117 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
118
119 e = UNSTUFF_BITS(resp, 47, 3);
120 m = UNSTUFF_BITS(resp, 62, 12);
121 csd->capacity = (1 + m) << (e + 2);
122
123 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
124 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
125 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
126 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
127 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
128 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
129 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
130 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
131
132 if (UNSTUFF_BITS(resp, 46, 1)) {
133 csd->erase_size = 1;
134 } else if (csd->write_blkbits >= 9) {
135 csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
136 csd->erase_size <<= csd->write_blkbits - 9;
137 }
138 break;
139 case 1:
140 /*
141 * This is a block-addressed SDHC or SDXC card. Most
142 * interesting fields are unused and have fixed
143 * values. To avoid getting tripped by buggy cards,
144 * we assume those fixed values ourselves.
145 */
146 mmc_card_set_blockaddr(card);
147
148 csd->taac_ns = 0; /* Unused */
149 csd->taac_clks = 0; /* Unused */
150
151 m = UNSTUFF_BITS(resp, 99, 4);
152 e = UNSTUFF_BITS(resp, 96, 3);
153 csd->max_dtr = tran_exp[e] * tran_mant[m];
154 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
155 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
156
157 /* SDXC cards have a minimum C_SIZE of 0x00FFFF */
158 if (csd->c_size >= 0xFFFF)
159 mmc_card_set_ext_capacity(card);
160
161 m = UNSTUFF_BITS(resp, 48, 22);
162 csd->capacity = (1 + m) << 10;
163
164 csd->read_blkbits = 9;
165 csd->read_partial = 0;
166 csd->write_misalign = 0;
167 csd->read_misalign = 0;
168 csd->r2w_factor = 4; /* Unused */
169 csd->write_blkbits = 9;
170 csd->write_partial = 0;
171 csd->erase_size = 1;
172 break;
173 default:
174 pr_err("%s: unrecognised CSD structure version %d\n",
175 mmc_hostname(card->host), csd_struct);
176 return -EINVAL;
177 }
178
179 card->erase_size = csd->erase_size;
180
181 return 0;
182 }
183
184 /*
185 * Given a 64-bit response, decode to our card SCR structure.
186 */
187 static int mmc_decode_scr(struct mmc_card *card)
188 {
189 struct sd_scr *scr = &card->scr;
190 unsigned int scr_struct;
191 u32 resp[4];
192
193 resp[3] = card->raw_scr[1];
194 resp[2] = card->raw_scr[0];
195
196 scr_struct = UNSTUFF_BITS(resp, 60, 4);
197 if (scr_struct != 0) {
198 pr_err("%s: unrecognised SCR structure version %d\n",
199 mmc_hostname(card->host), scr_struct);
200 return -EINVAL;
201 }
202
203 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
204 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
205 if (scr->sda_vsn == SCR_SPEC_VER_2)
206 /* Check if Physical Layer Spec v3.0 is supported */
207 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
208
209 if (scr->sda_spec3) {
210 scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1);
211 scr->sda_specx = UNSTUFF_BITS(resp, 38, 4);
212 }
213
214 if (UNSTUFF_BITS(resp, 55, 1))
215 card->erased_byte = 0xFF;
216 else
217 card->erased_byte = 0x0;
218
219 if (scr->sda_spec3)
220 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
221
222 /* SD Spec says: any SD Card shall set at least bits 0 and 2 */
223 if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) ||
224 !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) {
225 pr_err("%s: invalid bus width\n", mmc_hostname(card->host));
226 return -EINVAL;
227 }
228
229 return 0;
230 }
231
232 /*
233 * Fetch and process SD Status register.
234 */
235 static int mmc_read_ssr(struct mmc_card *card)
236 {
237 unsigned int au, es, et, eo;
238 __be32 *raw_ssr;
239 u32 resp[4] = {};
240 u8 discard_support;
241 int i;
242
243 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
244 pr_warn("%s: card lacks mandatory SD Status function\n",
245 mmc_hostname(card->host));
246 return 0;
247 }
248
249 raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
250 if (!raw_ssr)
251 return -ENOMEM;
252
253 if (mmc_app_sd_status(card, raw_ssr)) {
254 pr_warn("%s: problem reading SD Status register\n",
255 mmc_hostname(card->host));
256 kfree(raw_ssr);
257 return 0;
258 }
259
260 for (i = 0; i < 16; i++)
261 card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
262
263 kfree(raw_ssr);
264
265 /*
266 * UNSTUFF_BITS only works with four u32s so we have to offset the
267 * bitfield positions accordingly.
268 */
269 au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4);
270 if (au) {
271 if (au <= 9 || card->scr.sda_spec3) {
272 card->ssr.au = sd_au_size[au];
273 es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16);
274 et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6);
275 if (es && et) {
276 eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2);
277 card->ssr.erase_timeout = (et * 1000) / es;
278 card->ssr.erase_offset = eo * 1000;
279 }
280 } else {
281 pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
282 mmc_hostname(card->host));
283 }
284 }
285
286 /*
287 * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set
288 */
289 resp[3] = card->raw_ssr[6];
290 discard_support = UNSTUFF_BITS(resp, 313 - 288, 1);
291 card->erase_arg = (card->scr.sda_specx && discard_support) ?
292 SD_DISCARD_ARG : SD_ERASE_ARG;
293
294 return 0;
295 }
296
297 /*
298 * Fetches and decodes switch information
299 */
300 static int mmc_read_switch(struct mmc_card *card)
301 {
302 int err;
303 u8 *status;
304
305 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
306 return 0;
307
308 if (!(card->csd.cmdclass & CCC_SWITCH)) {
309 pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
310 mmc_hostname(card->host));
311 return 0;
312 }
313
314 status = kmalloc(64, GFP_KERNEL);
315 if (!status)
316 return -ENOMEM;
317
318 /*
319 * Find out the card's support bits with a mode 0 operation.
320 * The argument does not matter, as the support bits do not
321 * change with the arguments.
322 */
323 err = mmc_sd_switch(card, 0, 0, 0, status);
324 if (err) {
325 /*
326 * If the host or the card can't do the switch,
327 * fail more gracefully.
328 */
329 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
330 goto out;
331
332 pr_warn("%s: problem reading Bus Speed modes\n",
333 mmc_hostname(card->host));
334 err = 0;
335
336 goto out;
337 }
338
339 if (status[13] & SD_MODE_HIGH_SPEED)
340 card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
341
342 if (card->scr.sda_spec3) {
343 card->sw_caps.sd3_bus_mode = status[13];
344 /* Driver Strengths supported by the card */
345 card->sw_caps.sd3_drv_type = status[9];
346 card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
347 }
348
349 out:
350 kfree(status);
351
352 return err;
353 }
354
355 /*
356 * Test if the card supports high-speed mode and, if so, switch to it.
357 */
358 int mmc_sd_switch_hs(struct mmc_card *card)
359 {
360 int err;
361 u8 *status;
362
363 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
364 return 0;
365
366 if (!(card->csd.cmdclass & CCC_SWITCH))
367 return 0;
368
369 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
370 return 0;
371
372 if (card->sw_caps.hs_max_dtr == 0)
373 return 0;
374
375 status = kmalloc(64, GFP_KERNEL);
376 if (!status)
377 return -ENOMEM;
378
379 err = mmc_sd_switch(card, 1, 0, HIGH_SPEED_BUS_SPEED, status);
380 if (err)
381 goto out;
382
383 if ((status[16] & 0xF) != HIGH_SPEED_BUS_SPEED) {
384 pr_warn("%s: Problem switching card into high-speed mode!\n",
385 mmc_hostname(card->host));
386 err = 0;
387 } else {
388 err = 1;
389 }
390
391 out:
392 kfree(status);
393
394 return err;
395 }
396
397 static int sd_select_driver_type(struct mmc_card *card, u8 *status)
398 {
399 int card_drv_type, drive_strength, drv_type;
400 int err;
401
402 card->drive_strength = 0;
403
404 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
405
406 drive_strength = mmc_select_drive_strength(card,
407 card->sw_caps.uhs_max_dtr,
408 card_drv_type, &drv_type);
409
410 if (drive_strength) {
411 err = mmc_sd_switch(card, 1, 2, drive_strength, status);
412 if (err)
413 return err;
414 if ((status[15] & 0xF) != drive_strength) {
415 pr_warn("%s: Problem setting drive strength!\n",
416 mmc_hostname(card->host));
417 return 0;
418 }
419 card->drive_strength = drive_strength;
420 }
421
422 if (drv_type)
423 mmc_set_driver_type(card->host, drv_type);
424
425 return 0;
426 }
427
428 static void sd_update_bus_speed_mode(struct mmc_card *card)
429 {
430 /*
431 * If the host doesn't support any of the UHS-I modes, fallback on
432 * default speed.
433 */
434 if (!mmc_host_uhs(card->host)) {
435 card->sd_bus_speed = 0;
436 return;
437 }
438
439 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
440 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
441 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
442 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
443 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
444 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
445 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
446 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
447 SD_MODE_UHS_SDR50)) {
448 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
449 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
450 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
451 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
452 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
453 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
454 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
455 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
456 SD_MODE_UHS_SDR12)) {
457 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
458 }
459 }
460
461 static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
462 {
463 int err;
464 unsigned int timing = 0;
465
466 switch (card->sd_bus_speed) {
467 case UHS_SDR104_BUS_SPEED:
468 timing = MMC_TIMING_UHS_SDR104;
469 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
470 break;
471 case UHS_DDR50_BUS_SPEED:
472 timing = MMC_TIMING_UHS_DDR50;
473 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
474 break;
475 case UHS_SDR50_BUS_SPEED:
476 timing = MMC_TIMING_UHS_SDR50;
477 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
478 break;
479 case UHS_SDR25_BUS_SPEED:
480 timing = MMC_TIMING_UHS_SDR25;
481 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
482 break;
483 case UHS_SDR12_BUS_SPEED:
484 timing = MMC_TIMING_UHS_SDR12;
485 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
486 break;
487 default:
488 return 0;
489 }
490
491 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
492 if (err)
493 return err;
494
495 if ((status[16] & 0xF) != card->sd_bus_speed)
496 pr_warn("%s: Problem setting bus speed mode!\n",
497 mmc_hostname(card->host));
498 else {
499 mmc_set_timing(card->host, timing);
500 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
501 }
502
503 return 0;
504 }
505
506 /* Get host's max current setting at its current voltage */
507 static u32 sd_get_host_max_current(struct mmc_host *host)
508 {
509 u32 voltage, max_current;
510
511 voltage = 1 << host->ios.vdd;
512 switch (voltage) {
513 case MMC_VDD_165_195:
514 max_current = host->max_current_180;
515 break;
516 case MMC_VDD_29_30:
517 case MMC_VDD_30_31:
518 max_current = host->max_current_300;
519 break;
520 case MMC_VDD_32_33:
521 case MMC_VDD_33_34:
522 max_current = host->max_current_330;
523 break;
524 default:
525 max_current = 0;
526 }
527
528 return max_current;
529 }
530
531 static int sd_set_current_limit(struct mmc_card *card, u8 *status)
532 {
533 int current_limit = SD_SET_CURRENT_NO_CHANGE;
534 int err;
535 u32 max_current;
536
537 /*
538 * Current limit switch is only defined for SDR50, SDR104, and DDR50
539 * bus speed modes. For other bus speed modes, we do not change the
540 * current limit.
541 */
542 if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
543 (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
544 (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
545 return 0;
546
547 /*
548 * Host has different current capabilities when operating at
549 * different voltages, so find out its max current first.
550 */
551 max_current = sd_get_host_max_current(card->host);
552
553 /*
554 * We only check host's capability here, if we set a limit that is
555 * higher than the card's maximum current, the card will be using its
556 * maximum current, e.g. if the card's maximum current is 300ma, and
557 * when we set current limit to 200ma, the card will draw 200ma, and
558 * when we set current limit to 400/600/800ma, the card will draw its
559 * maximum 300ma from the host.
560 *
561 * The above is incorrect: if we try to set a current limit that is
562 * not supported by the card, the card can rightfully error out the
563 * attempt, and remain at the default current limit. This results
564 * in a 300mA card being limited to 200mA even though the host
565 * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
566 * an iMX6 host. --rmk
567 */
568 if (max_current >= 800 &&
569 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
570 current_limit = SD_SET_CURRENT_LIMIT_800;
571 else if (max_current >= 600 &&
572 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
573 current_limit = SD_SET_CURRENT_LIMIT_600;
574 else if (max_current >= 400 &&
575 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
576 current_limit = SD_SET_CURRENT_LIMIT_400;
577 else if (max_current >= 200 &&
578 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
579 current_limit = SD_SET_CURRENT_LIMIT_200;
580
581 if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
582 err = mmc_sd_switch(card, 1, 3, current_limit, status);
583 if (err)
584 return err;
585
586 if (((status[15] >> 4) & 0x0F) != current_limit)
587 pr_warn("%s: Problem setting current limit!\n",
588 mmc_hostname(card->host));
589
590 }
591
592 return 0;
593 }
594
595 /*
596 * UHS-I specific initialization procedure
597 */
598 static int mmc_sd_init_uhs_card(struct mmc_card *card)
599 {
600 int err;
601 u8 *status;
602
603 if (!(card->csd.cmdclass & CCC_SWITCH))
604 return 0;
605
606 status = kmalloc(64, GFP_KERNEL);
607 if (!status)
608 return -ENOMEM;
609
610 /* Set 4-bit bus width */
611 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
612 if (err)
613 goto out;
614
615 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
616
617 /*
618 * Select the bus speed mode depending on host
619 * and card capability.
620 */
621 sd_update_bus_speed_mode(card);
622
623 /* Set the driver strength for the card */
624 err = sd_select_driver_type(card, status);
625 if (err)
626 goto out;
627
628 /* Set current limit for the card */
629 err = sd_set_current_limit(card, status);
630 if (err)
631 goto out;
632
633 /* Set bus speed mode of the card */
634 err = sd_set_bus_speed_mode(card, status);
635 if (err)
636 goto out;
637
638 /*
639 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
640 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
641 */
642 if (!mmc_host_is_spi(card->host) &&
643 (card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
644 card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
645 card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
646 err = mmc_execute_tuning(card);
647
648 /*
649 * As SD Specifications Part1 Physical Layer Specification
650 * Version 3.01 says, CMD19 tuning is available for unlocked
651 * cards in transfer state of 1.8V signaling mode. The small
652 * difference between v3.00 and 3.01 spec means that CMD19
653 * tuning is also available for DDR50 mode.
654 */
655 if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
656 pr_warn("%s: ddr50 tuning failed\n",
657 mmc_hostname(card->host));
658 err = 0;
659 }
660 }
661
662 out:
663 kfree(status);
664
665 return err;
666 }
667
668 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
669 card->raw_cid[2], card->raw_cid[3]);
670 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
671 card->raw_csd[2], card->raw_csd[3]);
672 MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
673 MMC_DEV_ATTR(ssr,
674 "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n",
675 card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2],
676 card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5],
677 card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8],
678 card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11],
679 card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14],
680 card->raw_ssr[15]);
681 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
682 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
683 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
684 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
685 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
686 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
687 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
688 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
689 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
690 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
691 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
692
693
694 static ssize_t mmc_dsr_show(struct device *dev,
695 struct device_attribute *attr,
696 char *buf)
697 {
698 struct mmc_card *card = mmc_dev_to_card(dev);
699 struct mmc_host *host = card->host;
700
701 if (card->csd.dsr_imp && host->dsr_req)
702 return sprintf(buf, "0x%x\n", host->dsr);
703 else
704 /* return default DSR value */
705 return sprintf(buf, "0x%x\n", 0x404);
706 }
707
708 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
709
710 MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
711 MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
712 MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
713
714 #define sdio_info_attr(num) \
715 static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \
716 { \
717 struct mmc_card *card = mmc_dev_to_card(dev); \
718 \
719 if (num > card->num_info) \
720 return -ENODATA; \
721 if (!card->info[num-1][0]) \
722 return 0; \
723 return sprintf(buf, "%s\n", card->info[num-1]); \
724 } \
725 static DEVICE_ATTR_RO(info##num)
726
727 sdio_info_attr(1);
728 sdio_info_attr(2);
729 sdio_info_attr(3);
730 sdio_info_attr(4);
731
732 static struct attribute *sd_std_attrs[] = {
733 &dev_attr_vendor.attr,
734 &dev_attr_device.attr,
735 &dev_attr_revision.attr,
736 &dev_attr_info1.attr,
737 &dev_attr_info2.attr,
738 &dev_attr_info3.attr,
739 &dev_attr_info4.attr,
740 &dev_attr_cid.attr,
741 &dev_attr_csd.attr,
742 &dev_attr_scr.attr,
743 &dev_attr_ssr.attr,
744 &dev_attr_date.attr,
745 &dev_attr_erase_size.attr,
746 &dev_attr_preferred_erase_size.attr,
747 &dev_attr_fwrev.attr,
748 &dev_attr_hwrev.attr,
749 &dev_attr_manfid.attr,
750 &dev_attr_name.attr,
751 &dev_attr_oemid.attr,
752 &dev_attr_serial.attr,
753 &dev_attr_ocr.attr,
754 &dev_attr_rca.attr,
755 &dev_attr_dsr.attr,
756 NULL,
757 };
758
759 static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr,
760 int index)
761 {
762 struct device *dev = kobj_to_dev(kobj);
763 struct mmc_card *card = mmc_dev_to_card(dev);
764
765 /* CIS vendor and device ids, revision and info string are available only for Combo cards */
766 if ((attr == &dev_attr_vendor.attr ||
767 attr == &dev_attr_device.attr ||
768 attr == &dev_attr_revision.attr ||
769 attr == &dev_attr_info1.attr ||
770 attr == &dev_attr_info2.attr ||
771 attr == &dev_attr_info3.attr ||
772 attr == &dev_attr_info4.attr
773 ) && card->type != MMC_TYPE_SD_COMBO)
774 return 0;
775
776 return attr->mode;
777 }
778
779 static const struct attribute_group sd_std_group = {
780 .attrs = sd_std_attrs,
781 .is_visible = sd_std_is_visible,
782 };
783 __ATTRIBUTE_GROUPS(sd_std);
784
785 struct device_type sd_type = {
786 .groups = sd_std_groups,
787 };
788
789 /*
790 * Fetch CID from card.
791 */
792 int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
793 {
794 int err;
795 u32 max_current;
796 int retries = 10;
797 u32 pocr = ocr;
798
799 try_again:
800 if (!retries) {
801 ocr &= ~SD_OCR_S18R;
802 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
803 }
804
805 /*
806 * Since we're changing the OCR value, we seem to
807 * need to tell some cards to go back to the idle
808 * state. We wait 1ms to give cards time to
809 * respond.
810 */
811 mmc_go_idle(host);
812
813 /*
814 * If SD_SEND_IF_COND indicates an SD 2.0
815 * compliant card and we should set bit 30
816 * of the ocr to indicate that we can handle
817 * block-addressed SDHC cards.
818 */
819 err = mmc_send_if_cond(host, ocr);
820 if (!err)
821 ocr |= SD_OCR_CCS;
822
823 /*
824 * If the host supports one of UHS-I modes, request the card
825 * to switch to 1.8V signaling level. If the card has failed
826 * repeatedly to switch however, skip this.
827 */
828 if (retries && mmc_host_uhs(host))
829 ocr |= SD_OCR_S18R;
830
831 /*
832 * If the host can supply more than 150mA at current voltage,
833 * XPC should be set to 1.
834 */
835 max_current = sd_get_host_max_current(host);
836 if (max_current > 150)
837 ocr |= SD_OCR_XPC;
838
839 err = mmc_send_app_op_cond(host, ocr, rocr);
840 if (err)
841 return err;
842
843 /*
844 * In case CCS and S18A in the response is set, start Signal Voltage
845 * Switch procedure. SPI mode doesn't support CMD11.
846 */
847 if (!mmc_host_is_spi(host) && rocr &&
848 ((*rocr & 0x41000000) == 0x41000000)) {
849 err = mmc_set_uhs_voltage(host, pocr);
850 if (err == -EAGAIN) {
851 retries--;
852 goto try_again;
853 } else if (err) {
854 retries = 0;
855 goto try_again;
856 }
857 }
858
859 err = mmc_send_cid(host, cid);
860 return err;
861 }
862
863 int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card)
864 {
865 int err;
866
867 /*
868 * Fetch CSD from card.
869 */
870 err = mmc_send_csd(card, card->raw_csd);
871 if (err)
872 return err;
873
874 err = mmc_decode_csd(card);
875 if (err)
876 return err;
877
878 return 0;
879 }
880
881 static int mmc_sd_get_ro(struct mmc_host *host)
882 {
883 int ro;
884
885 /*
886 * Some systems don't feature a write-protect pin and don't need one.
887 * E.g. because they only have micro-SD card slot. For those systems
888 * assume that the SD card is always read-write.
889 */
890 if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
891 return 0;
892
893 if (!host->ops->get_ro)
894 return -1;
895
896 ro = host->ops->get_ro(host);
897
898 return ro;
899 }
900
901 int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
902 bool reinit)
903 {
904 int err;
905
906 if (!reinit) {
907 /*
908 * Fetch SCR from card.
909 */
910 err = mmc_app_send_scr(card);
911 if (err)
912 return err;
913
914 err = mmc_decode_scr(card);
915 if (err)
916 return err;
917
918 /*
919 * Fetch and process SD Status register.
920 */
921 err = mmc_read_ssr(card);
922 if (err)
923 return err;
924
925 /* Erase init depends on CSD and SSR */
926 mmc_init_erase(card);
927
928 /*
929 * Fetch switch information from card.
930 */
931 err = mmc_read_switch(card);
932 if (err)
933 return err;
934 }
935
936 /*
937 * For SPI, enable CRC as appropriate.
938 * This CRC enable is located AFTER the reading of the
939 * card registers because some SDHC cards are not able
940 * to provide valid CRCs for non-512-byte blocks.
941 */
942 if (mmc_host_is_spi(host)) {
943 err = mmc_spi_set_crc(host, use_spi_crc);
944 if (err)
945 return err;
946 }
947
948 /*
949 * Check if read-only switch is active.
950 */
951 if (!reinit) {
952 int ro = mmc_sd_get_ro(host);
953
954 if (ro < 0) {
955 pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
956 mmc_hostname(host));
957 } else if (ro > 0) {
958 mmc_card_set_readonly(card);
959 }
960 }
961
962 return 0;
963 }
964
965 unsigned mmc_sd_get_max_clock(struct mmc_card *card)
966 {
967 unsigned max_dtr = (unsigned int)-1;
968
969 if (mmc_card_hs(card)) {
970 if (max_dtr > card->sw_caps.hs_max_dtr)
971 max_dtr = card->sw_caps.hs_max_dtr;
972 } else if (max_dtr > card->csd.max_dtr) {
973 max_dtr = card->csd.max_dtr;
974 }
975
976 return max_dtr;
977 }
978
979 static bool mmc_sd_card_using_v18(struct mmc_card *card)
980 {
981 /*
982 * According to the SD spec., the Bus Speed Mode (function group 1) bits
983 * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
984 * they can be used to determine if the card has already switched to
985 * 1.8V signaling.
986 */
987 return card->sw_caps.sd3_bus_mode &
988 (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
989 }
990
991 /*
992 * Handle the detection and initialisation of a card.
993 *
994 * In the case of a resume, "oldcard" will contain the card
995 * we're trying to reinitialise.
996 */
997 static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
998 struct mmc_card *oldcard)
999 {
1000 struct mmc_card *card;
1001 int err;
1002 u32 cid[4];
1003 u32 rocr = 0;
1004 bool v18_fixup_failed = false;
1005
1006 WARN_ON(!host->claimed);
1007 retry:
1008 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
1009 if (err)
1010 return err;
1011
1012 if (oldcard) {
1013 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1014 pr_debug("%s: Perhaps the card was replaced\n",
1015 mmc_hostname(host));
1016 return -ENOENT;
1017 }
1018
1019 card = oldcard;
1020 } else {
1021 /*
1022 * Allocate card structure.
1023 */
1024 card = mmc_alloc_card(host, &sd_type);
1025 if (IS_ERR(card))
1026 return PTR_ERR(card);
1027
1028 card->ocr = ocr;
1029 card->type = MMC_TYPE_SD;
1030 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1031 }
1032
1033 /*
1034 * Call the optional HC's init_card function to handle quirks.
1035 */
1036 if (host->ops->init_card)
1037 host->ops->init_card(host, card);
1038
1039 /*
1040 * For native busses: get card RCA and quit open drain mode.
1041 */
1042 if (!mmc_host_is_spi(host)) {
1043 err = mmc_send_relative_addr(host, &card->rca);
1044 if (err)
1045 goto free_card;
1046 }
1047
1048 if (!oldcard) {
1049 err = mmc_sd_get_csd(host, card);
1050 if (err)
1051 goto free_card;
1052
1053 mmc_decode_cid(card);
1054 }
1055
1056 /*
1057 * handling only for cards supporting DSR and hosts requesting
1058 * DSR configuration
1059 */
1060 if (card->csd.dsr_imp && host->dsr_req)
1061 mmc_set_dsr(host);
1062
1063 /*
1064 * Select card, as all following commands rely on that.
1065 */
1066 if (!mmc_host_is_spi(host)) {
1067 err = mmc_select_card(card);
1068 if (err)
1069 goto free_card;
1070 }
1071
1072 err = mmc_sd_setup_card(host, card, oldcard != NULL);
1073 if (err)
1074 goto free_card;
1075
1076 /*
1077 * If the card has not been power cycled, it may still be using 1.8V
1078 * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
1079 * transfer mode.
1080 */
1081 if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
1082 mmc_sd_card_using_v18(card) &&
1083 host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1084 /*
1085 * Re-read switch information in case it has changed since
1086 * oldcard was initialized.
1087 */
1088 if (oldcard) {
1089 err = mmc_read_switch(card);
1090 if (err)
1091 goto free_card;
1092 }
1093 if (mmc_sd_card_using_v18(card)) {
1094 if (mmc_host_set_uhs_voltage(host) ||
1095 mmc_sd_init_uhs_card(card)) {
1096 v18_fixup_failed = true;
1097 mmc_power_cycle(host, ocr);
1098 if (!oldcard)
1099 mmc_remove_card(card);
1100 goto retry;
1101 }
1102 goto done;
1103 }
1104 }
1105
1106 /* Initialization sequence for UHS-I cards */
1107 if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
1108 err = mmc_sd_init_uhs_card(card);
1109 if (err)
1110 goto free_card;
1111 } else {
1112 /*
1113 * Attempt to change to high-speed (if supported)
1114 */
1115 err = mmc_sd_switch_hs(card);
1116 if (err > 0)
1117 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
1118 else if (err)
1119 goto free_card;
1120
1121 /*
1122 * Set bus speed.
1123 */
1124 mmc_set_clock(host, mmc_sd_get_max_clock(card));
1125
1126 /*
1127 * Switch to wider bus (if supported).
1128 */
1129 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
1130 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
1131 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
1132 if (err)
1133 goto free_card;
1134
1135 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
1136 }
1137 }
1138
1139 if (host->cqe_ops && !host->cqe_enabled) {
1140 err = host->cqe_ops->cqe_enable(host, card);
1141 if (!err) {
1142 host->cqe_enabled = true;
1143 host->hsq_enabled = true;
1144 pr_info("%s: Host Software Queue enabled\n",
1145 mmc_hostname(host));
1146 }
1147 }
1148
1149 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1150 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1151 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1152 mmc_hostname(host));
1153 err = -EINVAL;
1154 goto free_card;
1155 }
1156 done:
1157 host->card = card;
1158 return 0;
1159
1160 free_card:
1161 if (!oldcard)
1162 mmc_remove_card(card);
1163
1164 return err;
1165 }
1166
1167 /*
1168 * Host is being removed. Free up the current card.
1169 */
1170 static void mmc_sd_remove(struct mmc_host *host)
1171 {
1172 mmc_remove_card(host->card);
1173 host->card = NULL;
1174 }
1175
1176 /*
1177 * Card detection - card is alive.
1178 */
1179 static int mmc_sd_alive(struct mmc_host *host)
1180 {
1181 return mmc_send_status(host->card, NULL);
1182 }
1183
1184 /*
1185 * Card detection callback from host.
1186 */
1187 static void mmc_sd_detect(struct mmc_host *host)
1188 {
1189 int err;
1190
1191 mmc_get_card(host->card, NULL);
1192
1193 /*
1194 * Just check if our card has been removed.
1195 */
1196 err = _mmc_detect_card_removed(host);
1197
1198 mmc_put_card(host->card, NULL);
1199
1200 if (err) {
1201 mmc_sd_remove(host);
1202
1203 mmc_claim_host(host);
1204 mmc_detach_bus(host);
1205 mmc_power_off(host);
1206 mmc_release_host(host);
1207 }
1208 }
1209
1210 static int _mmc_sd_suspend(struct mmc_host *host)
1211 {
1212 int err = 0;
1213
1214 mmc_claim_host(host);
1215
1216 if (mmc_card_suspended(host->card))
1217 goto out;
1218
1219 if (!mmc_host_is_spi(host))
1220 err = mmc_deselect_cards(host);
1221
1222 if (!err) {
1223 mmc_power_off(host);
1224 mmc_card_set_suspended(host->card);
1225 }
1226
1227 out:
1228 mmc_release_host(host);
1229 return err;
1230 }
1231
1232 /*
1233 * Callback for suspend
1234 */
1235 static int mmc_sd_suspend(struct mmc_host *host)
1236 {
1237 int err;
1238
1239 err = _mmc_sd_suspend(host);
1240 if (!err) {
1241 pm_runtime_disable(&host->card->dev);
1242 pm_runtime_set_suspended(&host->card->dev);
1243 }
1244
1245 return err;
1246 }
1247
1248 /*
1249 * This function tries to determine if the same card is still present
1250 * and, if so, restore all state to it.
1251 */
1252 static int _mmc_sd_resume(struct mmc_host *host)
1253 {
1254 int err = 0;
1255
1256 mmc_claim_host(host);
1257
1258 if (!mmc_card_suspended(host->card))
1259 goto out;
1260
1261 mmc_power_up(host, host->card->ocr);
1262 err = mmc_sd_init_card(host, host->card->ocr, host->card);
1263 mmc_card_clr_suspended(host->card);
1264
1265 out:
1266 mmc_release_host(host);
1267 return err;
1268 }
1269
1270 /*
1271 * Callback for resume
1272 */
1273 static int mmc_sd_resume(struct mmc_host *host)
1274 {
1275 pm_runtime_enable(&host->card->dev);
1276 return 0;
1277 }
1278
1279 /*
1280 * Callback for runtime_suspend.
1281 */
1282 static int mmc_sd_runtime_suspend(struct mmc_host *host)
1283 {
1284 int err;
1285
1286 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1287 return 0;
1288
1289 err = _mmc_sd_suspend(host);
1290 if (err)
1291 pr_err("%s: error %d doing aggressive suspend\n",
1292 mmc_hostname(host), err);
1293
1294 return err;
1295 }
1296
1297 /*
1298 * Callback for runtime_resume.
1299 */
1300 static int mmc_sd_runtime_resume(struct mmc_host *host)
1301 {
1302 int err;
1303
1304 err = _mmc_sd_resume(host);
1305 if (err && err != -ENOMEDIUM)
1306 pr_err("%s: error %d doing runtime resume\n",
1307 mmc_hostname(host), err);
1308
1309 return 0;
1310 }
1311
1312 static int mmc_sd_hw_reset(struct mmc_host *host)
1313 {
1314 mmc_power_cycle(host, host->card->ocr);
1315 return mmc_sd_init_card(host, host->card->ocr, host->card);
1316 }
1317
1318 static const struct mmc_bus_ops mmc_sd_ops = {
1319 .remove = mmc_sd_remove,
1320 .detect = mmc_sd_detect,
1321 .runtime_suspend = mmc_sd_runtime_suspend,
1322 .runtime_resume = mmc_sd_runtime_resume,
1323 .suspend = mmc_sd_suspend,
1324 .resume = mmc_sd_resume,
1325 .alive = mmc_sd_alive,
1326 .shutdown = mmc_sd_suspend,
1327 .hw_reset = mmc_sd_hw_reset,
1328 };
1329
1330 /*
1331 * Starting point for SD card init.
1332 */
1333 int mmc_attach_sd(struct mmc_host *host)
1334 {
1335 int err;
1336 u32 ocr, rocr;
1337
1338 WARN_ON(!host->claimed);
1339
1340 err = mmc_send_app_op_cond(host, 0, &ocr);
1341 if (err)
1342 return err;
1343
1344 mmc_attach_bus(host, &mmc_sd_ops);
1345 if (host->ocr_avail_sd)
1346 host->ocr_avail = host->ocr_avail_sd;
1347
1348 /*
1349 * We need to get OCR a different way for SPI.
1350 */
1351 if (mmc_host_is_spi(host)) {
1352 mmc_go_idle(host);
1353
1354 err = mmc_spi_read_ocr(host, 0, &ocr);
1355 if (err)
1356 goto err;
1357 }
1358
1359 /*
1360 * Some SD cards claims an out of spec VDD voltage range. Let's treat
1361 * these bits as being in-valid and especially also bit7.
1362 */
1363 ocr &= ~0x7FFF;
1364
1365 rocr = mmc_select_voltage(host, ocr);
1366
1367 /*
1368 * Can we support the voltage(s) of the card(s)?
1369 */
1370 if (!rocr) {
1371 err = -EINVAL;
1372 goto err;
1373 }
1374
1375 /*
1376 * Detect and init the card.
1377 */
1378 err = mmc_sd_init_card(host, rocr, NULL);
1379 if (err)
1380 goto err;
1381
1382 mmc_release_host(host);
1383 err = mmc_add_card(host->card);
1384 if (err)
1385 goto remove_card;
1386
1387 mmc_claim_host(host);
1388 return 0;
1389
1390 remove_card:
1391 mmc_remove_card(host->card);
1392 host->card = NULL;
1393 mmc_claim_host(host);
1394 err:
1395 mmc_detach_bus(host);
1396
1397 pr_err("%s: error %d whilst initialising SD card\n",
1398 mmc_hostname(host), err);
1399
1400 return err;
1401 }
Linux with added FPC-III support