1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/mmc/core/sd.c
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.
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>
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
19 #include <linux/mmc/sd.h>
29 static const unsigned int tran_exp[] = {
30 10000, 100000, 1000000, 10000000,
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,
39 static const unsigned int taac_exp[] = {
40 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
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,
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,
55 #define UNSTUFF_BITS(resp,start,size) \
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; \
63 __res = resp[__off] >> __shft; \
64 if (__size + __shft > 32) \
65 __res |= resp[__off-1] << ((32 - __shft) % 32); \
70 * Given the decoded CSD structure, decode the raw CID to our CID structure.
72 void mmc_decode_cid(struct mmc_card *card)
74 u32 *resp = card->raw_cid;
77 * SD doesn't currently have a version field so we will
78 * have to assume we can parse this.
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);
93 card->cid.year += 2000; /* SD cards year offset */
97 * Given a 128-bit response, decode to our card CSD structure.
99 static int mmc_decode_csd(struct mmc_card *card)
101 struct mmc_csd *csd = &card->csd;
102 unsigned int e, m, csd_struct;
103 u32 *resp = card->raw_csd;
105 csd_struct = UNSTUFF_BITS(resp, 126, 2);
107 switch (csd_struct) {
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;
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);
119 e = UNSTUFF_BITS(resp, 47, 3);
120 m = UNSTUFF_BITS(resp, 62, 12);
121 csd->capacity = (1 + m) << (e + 2);
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);
132 if (UNSTUFF_BITS(resp, 46, 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;
139 if (UNSTUFF_BITS(resp, 13, 1))
140 mmc_card_set_readonly(card);
144 * This is a block-addressed SDHC or SDXC card. Most
145 * interesting fields are unused and have fixed
146 * values. To avoid getting tripped by buggy cards,
147 * we assume those fixed values ourselves.
149 mmc_card_set_blockaddr(card);
151 csd->taac_ns = 0; /* Unused */
152 csd->taac_clks = 0; /* Unused */
154 m = UNSTUFF_BITS(resp, 99, 4);
155 e = UNSTUFF_BITS(resp, 96, 3);
156 csd->max_dtr = tran_exp[e] * tran_mant[m];
157 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
158 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
160 /* SDXC cards have a minimum C_SIZE of 0x00FFFF */
161 if (csd->c_size >= 0xFFFF)
162 mmc_card_set_ext_capacity(card);
164 m = UNSTUFF_BITS(resp, 48, 22);
165 csd->capacity = (1 + m) << 10;
167 csd->read_blkbits = 9;
168 csd->read_partial = 0;
169 csd->write_misalign = 0;
170 csd->read_misalign = 0;
171 csd->r2w_factor = 4; /* Unused */
172 csd->write_blkbits = 9;
173 csd->write_partial = 0;
176 if (UNSTUFF_BITS(resp, 13, 1))
177 mmc_card_set_readonly(card);
180 pr_err("%s: unrecognised CSD structure version %d\n",
181 mmc_hostname(card->host), csd_struct);
185 card->erase_size = csd->erase_size;
191 * Given a 64-bit response, decode to our card SCR structure.
193 static int mmc_decode_scr(struct mmc_card *card)
195 struct sd_scr *scr = &card->scr;
196 unsigned int scr_struct;
199 resp[3] = card->raw_scr[1];
200 resp[2] = card->raw_scr[0];
202 scr_struct = UNSTUFF_BITS(resp, 60, 4);
203 if (scr_struct != 0) {
204 pr_err("%s: unrecognised SCR structure version %d\n",
205 mmc_hostname(card->host), scr_struct);
209 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
210 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
211 if (scr->sda_vsn == SCR_SPEC_VER_2)
212 /* Check if Physical Layer Spec v3.0 is supported */
213 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
215 if (scr->sda_spec3) {
216 scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1);
217 scr->sda_specx = UNSTUFF_BITS(resp, 38, 4);
220 if (UNSTUFF_BITS(resp, 55, 1))
221 card->erased_byte = 0xFF;
223 card->erased_byte = 0x0;
226 scr->cmds = UNSTUFF_BITS(resp, 32, 4);
227 else if (scr->sda_spec3)
228 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
230 /* SD Spec says: any SD Card shall set at least bits 0 and 2 */
231 if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) ||
232 !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) {
233 pr_err("%s: invalid bus width\n", mmc_hostname(card->host));
241 * Fetch and process SD Status register.
243 static int mmc_read_ssr(struct mmc_card *card)
245 unsigned int au, es, et, eo;
251 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
252 pr_warn("%s: card lacks mandatory SD Status function\n",
253 mmc_hostname(card->host));
257 raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
261 if (mmc_app_sd_status(card, raw_ssr)) {
262 pr_warn("%s: problem reading SD Status register\n",
263 mmc_hostname(card->host));
268 for (i = 0; i < 16; i++)
269 card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
274 * UNSTUFF_BITS only works with four u32s so we have to offset the
275 * bitfield positions accordingly.
277 au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4);
279 if (au <= 9 || card->scr.sda_spec3) {
280 card->ssr.au = sd_au_size[au];
281 es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16);
282 et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6);
284 eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2);
285 card->ssr.erase_timeout = (et * 1000) / es;
286 card->ssr.erase_offset = eo * 1000;
289 pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
290 mmc_hostname(card->host));
295 * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set
297 resp[3] = card->raw_ssr[6];
298 discard_support = UNSTUFF_BITS(resp, 313 - 288, 1);
299 card->erase_arg = (card->scr.sda_specx && discard_support) ?
300 SD_DISCARD_ARG : SD_ERASE_ARG;
306 * Fetches and decodes switch information
308 static int mmc_read_switch(struct mmc_card *card)
313 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
316 if (!(card->csd.cmdclass & CCC_SWITCH)) {
317 pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
318 mmc_hostname(card->host));
322 status = kmalloc(64, GFP_KERNEL);
327 * Find out the card's support bits with a mode 0 operation.
328 * The argument does not matter, as the support bits do not
329 * change with the arguments.
331 err = mmc_sd_switch(card, 0, 0, 0, status);
334 * If the host or the card can't do the switch,
335 * fail more gracefully.
337 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
340 pr_warn("%s: problem reading Bus Speed modes\n",
341 mmc_hostname(card->host));
347 if (status[13] & SD_MODE_HIGH_SPEED)
348 card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
350 if (card->scr.sda_spec3) {
351 card->sw_caps.sd3_bus_mode = status[13];
352 /* Driver Strengths supported by the card */
353 card->sw_caps.sd3_drv_type = status[9];
354 card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
364 * Test if the card supports high-speed mode and, if so, switch to it.
366 int mmc_sd_switch_hs(struct mmc_card *card)
371 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
374 if (!(card->csd.cmdclass & CCC_SWITCH))
377 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
380 if (card->sw_caps.hs_max_dtr == 0)
383 status = kmalloc(64, GFP_KERNEL);
387 err = mmc_sd_switch(card, 1, 0, HIGH_SPEED_BUS_SPEED, status);
391 if ((status[16] & 0xF) != HIGH_SPEED_BUS_SPEED) {
392 pr_warn("%s: Problem switching card into high-speed mode!\n",
393 mmc_hostname(card->host));
405 static int sd_select_driver_type(struct mmc_card *card, u8 *status)
407 int card_drv_type, drive_strength, drv_type;
410 card->drive_strength = 0;
412 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
414 drive_strength = mmc_select_drive_strength(card,
415 card->sw_caps.uhs_max_dtr,
416 card_drv_type, &drv_type);
418 if (drive_strength) {
419 err = mmc_sd_switch(card, 1, 2, drive_strength, status);
422 if ((status[15] & 0xF) != drive_strength) {
423 pr_warn("%s: Problem setting drive strength!\n",
424 mmc_hostname(card->host));
427 card->drive_strength = drive_strength;
431 mmc_set_driver_type(card->host, drv_type);
436 static void sd_update_bus_speed_mode(struct mmc_card *card)
439 * If the host doesn't support any of the UHS-I modes, fallback on
442 if (!mmc_host_uhs(card->host)) {
443 card->sd_bus_speed = 0;
447 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
448 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
449 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
450 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
451 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
452 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
453 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
454 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
455 SD_MODE_UHS_SDR50)) {
456 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
457 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
458 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
459 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
460 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
461 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
462 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
463 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
464 SD_MODE_UHS_SDR12)) {
465 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
469 static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
472 unsigned int timing = 0;
474 switch (card->sd_bus_speed) {
475 case UHS_SDR104_BUS_SPEED:
476 timing = MMC_TIMING_UHS_SDR104;
477 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
479 case UHS_DDR50_BUS_SPEED:
480 timing = MMC_TIMING_UHS_DDR50;
481 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
483 case UHS_SDR50_BUS_SPEED:
484 timing = MMC_TIMING_UHS_SDR50;
485 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
487 case UHS_SDR25_BUS_SPEED:
488 timing = MMC_TIMING_UHS_SDR25;
489 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
491 case UHS_SDR12_BUS_SPEED:
492 timing = MMC_TIMING_UHS_SDR12;
493 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
499 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
503 if ((status[16] & 0xF) != card->sd_bus_speed)
504 pr_warn("%s: Problem setting bus speed mode!\n",
505 mmc_hostname(card->host));
507 mmc_set_timing(card->host, timing);
508 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
514 /* Get host's max current setting at its current voltage */
515 static u32 sd_get_host_max_current(struct mmc_host *host)
517 u32 voltage, max_current;
519 voltage = 1 << host->ios.vdd;
521 case MMC_VDD_165_195:
522 max_current = host->max_current_180;
526 max_current = host->max_current_300;
530 max_current = host->max_current_330;
539 static int sd_set_current_limit(struct mmc_card *card, u8 *status)
541 int current_limit = SD_SET_CURRENT_NO_CHANGE;
546 * Current limit switch is only defined for SDR50, SDR104, and DDR50
547 * bus speed modes. For other bus speed modes, we do not change the
550 if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
551 (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
552 (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
556 * Host has different current capabilities when operating at
557 * different voltages, so find out its max current first.
559 max_current = sd_get_host_max_current(card->host);
562 * We only check host's capability here, if we set a limit that is
563 * higher than the card's maximum current, the card will be using its
564 * maximum current, e.g. if the card's maximum current is 300ma, and
565 * when we set current limit to 200ma, the card will draw 200ma, and
566 * when we set current limit to 400/600/800ma, the card will draw its
567 * maximum 300ma from the host.
569 * The above is incorrect: if we try to set a current limit that is
570 * not supported by the card, the card can rightfully error out the
571 * attempt, and remain at the default current limit. This results
572 * in a 300mA card being limited to 200mA even though the host
573 * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
574 * an iMX6 host. --rmk
576 if (max_current >= 800 &&
577 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
578 current_limit = SD_SET_CURRENT_LIMIT_800;
579 else if (max_current >= 600 &&
580 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
581 current_limit = SD_SET_CURRENT_LIMIT_600;
582 else if (max_current >= 400 &&
583 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
584 current_limit = SD_SET_CURRENT_LIMIT_400;
585 else if (max_current >= 200 &&
586 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
587 current_limit = SD_SET_CURRENT_LIMIT_200;
589 if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
590 err = mmc_sd_switch(card, 1, 3, current_limit, status);
594 if (((status[15] >> 4) & 0x0F) != current_limit)
595 pr_warn("%s: Problem setting current limit!\n",
596 mmc_hostname(card->host));
604 * UHS-I specific initialization procedure
606 static int mmc_sd_init_uhs_card(struct mmc_card *card)
611 if (!(card->csd.cmdclass & CCC_SWITCH))
614 status = kmalloc(64, GFP_KERNEL);
618 /* Set 4-bit bus width */
619 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
623 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
626 * Select the bus speed mode depending on host
627 * and card capability.
629 sd_update_bus_speed_mode(card);
631 /* Set the driver strength for the card */
632 err = sd_select_driver_type(card, status);
636 /* Set current limit for the card */
637 err = sd_set_current_limit(card, status);
641 /* Set bus speed mode of the card */
642 err = sd_set_bus_speed_mode(card, status);
647 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
648 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
650 if (!mmc_host_is_spi(card->host) &&
651 (card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
652 card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
653 card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
654 err = mmc_execute_tuning(card);
657 * As SD Specifications Part1 Physical Layer Specification
658 * Version 3.01 says, CMD19 tuning is available for unlocked
659 * cards in transfer state of 1.8V signaling mode. The small
660 * difference between v3.00 and 3.01 spec means that CMD19
661 * tuning is also available for DDR50 mode.
663 if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
664 pr_warn("%s: ddr50 tuning failed\n",
665 mmc_hostname(card->host));
676 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
677 card->raw_cid[2], card->raw_cid[3]);
678 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
679 card->raw_csd[2], card->raw_csd[3]);
680 MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
682 "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n",
683 card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2],
684 card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5],
685 card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8],
686 card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11],
687 card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14],
689 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
690 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
691 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
692 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
693 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
694 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
695 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
696 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
697 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
698 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
699 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
702 static ssize_t mmc_dsr_show(struct device *dev,
703 struct device_attribute *attr,
706 struct mmc_card *card = mmc_dev_to_card(dev);
707 struct mmc_host *host = card->host;
709 if (card->csd.dsr_imp && host->dsr_req)
710 return sprintf(buf, "0x%x\n", host->dsr);
712 /* return default DSR value */
713 return sprintf(buf, "0x%x\n", 0x404);
716 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
718 MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
719 MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
720 MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
722 #define sdio_info_attr(num) \
723 static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \
725 struct mmc_card *card = mmc_dev_to_card(dev); \
727 if (num > card->num_info) \
729 if (!card->info[num-1][0]) \
731 return sprintf(buf, "%s\n", card->info[num-1]); \
733 static DEVICE_ATTR_RO(info##num)
740 static struct attribute *sd_std_attrs[] = {
741 &dev_attr_vendor.attr,
742 &dev_attr_device.attr,
743 &dev_attr_revision.attr,
744 &dev_attr_info1.attr,
745 &dev_attr_info2.attr,
746 &dev_attr_info3.attr,
747 &dev_attr_info4.attr,
753 &dev_attr_erase_size.attr,
754 &dev_attr_preferred_erase_size.attr,
755 &dev_attr_fwrev.attr,
756 &dev_attr_hwrev.attr,
757 &dev_attr_manfid.attr,
759 &dev_attr_oemid.attr,
760 &dev_attr_serial.attr,
767 static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr,
770 struct device *dev = kobj_to_dev(kobj);
771 struct mmc_card *card = mmc_dev_to_card(dev);
773 /* CIS vendor and device ids, revision and info string are available only for Combo cards */
774 if ((attr == &dev_attr_vendor.attr ||
775 attr == &dev_attr_device.attr ||
776 attr == &dev_attr_revision.attr ||
777 attr == &dev_attr_info1.attr ||
778 attr == &dev_attr_info2.attr ||
779 attr == &dev_attr_info3.attr ||
780 attr == &dev_attr_info4.attr
781 ) && card->type != MMC_TYPE_SD_COMBO)
787 static const struct attribute_group sd_std_group = {
788 .attrs = sd_std_attrs,
789 .is_visible = sd_std_is_visible,
791 __ATTRIBUTE_GROUPS(sd_std);
793 struct device_type sd_type = {
794 .groups = sd_std_groups,
798 * Fetch CID from card.
800 int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
810 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
814 * Since we're changing the OCR value, we seem to
815 * need to tell some cards to go back to the idle
816 * state. We wait 1ms to give cards time to
822 * If SD_SEND_IF_COND indicates an SD 2.0
823 * compliant card and we should set bit 30
824 * of the ocr to indicate that we can handle
825 * block-addressed SDHC cards.
827 err = mmc_send_if_cond(host, ocr);
832 * If the host supports one of UHS-I modes, request the card
833 * to switch to 1.8V signaling level. If the card has failed
834 * repeatedly to switch however, skip this.
836 if (retries && mmc_host_uhs(host))
840 * If the host can supply more than 150mA at current voltage,
841 * XPC should be set to 1.
843 max_current = sd_get_host_max_current(host);
844 if (max_current > 150)
847 err = mmc_send_app_op_cond(host, ocr, rocr);
852 * In case CCS and S18A in the response is set, start Signal Voltage
853 * Switch procedure. SPI mode doesn't support CMD11.
855 if (!mmc_host_is_spi(host) && rocr &&
856 ((*rocr & 0x41000000) == 0x41000000)) {
857 err = mmc_set_uhs_voltage(host, pocr);
858 if (err == -EAGAIN) {
867 err = mmc_send_cid(host, cid);
871 int mmc_sd_get_csd(struct mmc_card *card)
876 * Fetch CSD from card.
878 err = mmc_send_csd(card, card->raw_csd);
882 err = mmc_decode_csd(card);
889 static int mmc_sd_get_ro(struct mmc_host *host)
894 * Some systems don't feature a write-protect pin and don't need one.
895 * E.g. because they only have micro-SD card slot. For those systems
896 * assume that the SD card is always read-write.
898 if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
901 if (!host->ops->get_ro)
904 ro = host->ops->get_ro(host);
909 int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
916 * Fetch SCR from card.
918 err = mmc_app_send_scr(card);
922 err = mmc_decode_scr(card);
927 * Fetch and process SD Status register.
929 err = mmc_read_ssr(card);
933 /* Erase init depends on CSD and SSR */
934 mmc_init_erase(card);
937 * Fetch switch information from card.
939 err = mmc_read_switch(card);
945 * For SPI, enable CRC as appropriate.
946 * This CRC enable is located AFTER the reading of the
947 * card registers because some SDHC cards are not able
948 * to provide valid CRCs for non-512-byte blocks.
950 if (mmc_host_is_spi(host)) {
951 err = mmc_spi_set_crc(host, use_spi_crc);
957 * Check if read-only switch is active.
960 int ro = mmc_sd_get_ro(host);
963 pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
966 mmc_card_set_readonly(card);
973 unsigned mmc_sd_get_max_clock(struct mmc_card *card)
975 unsigned max_dtr = (unsigned int)-1;
977 if (mmc_card_hs(card)) {
978 if (max_dtr > card->sw_caps.hs_max_dtr)
979 max_dtr = card->sw_caps.hs_max_dtr;
980 } else if (max_dtr > card->csd.max_dtr) {
981 max_dtr = card->csd.max_dtr;
987 static bool mmc_sd_card_using_v18(struct mmc_card *card)
990 * According to the SD spec., the Bus Speed Mode (function group 1) bits
991 * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
992 * they can be used to determine if the card has already switched to
995 return card->sw_caps.sd3_bus_mode &
996 (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
999 static int sd_read_ext_reg(struct mmc_card *card, u8 fno, u8 page,
1000 u16 offset, u16 len, u8 *reg_buf)
1005 * Command arguments of CMD48:
1006 * [31:31] MIO (0 = memory).
1007 * [30:27] FNO (function number).
1008 * [26:26] reserved (0).
1009 * [25:18] page number.
1010 * [17:9] offset address.
1011 * [8:0] length (0 = 1 byte, 1ff = 512 bytes).
1013 cmd_args = fno << 27 | page << 18 | offset << 9 | (len -1);
1015 return mmc_send_adtc_data(card, card->host, SD_READ_EXTR_SINGLE,
1016 cmd_args, reg_buf, 512);
1019 static int sd_parse_ext_reg_power(struct mmc_card *card, u8 fno, u8 page,
1025 reg_buf = kzalloc(512, GFP_KERNEL);
1029 /* Read the extension register for power management function. */
1030 err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
1032 pr_warn("%s: error %d reading PM func of ext reg\n",
1033 mmc_hostname(card->host), err);
1037 /* PM revision consists of 4 bits. */
1038 card->ext_power.rev = reg_buf[0] & 0xf;
1040 /* Power Off Notification support at bit 4. */
1041 if (reg_buf[1] & BIT(4))
1042 card->ext_power.feature_support |= SD_EXT_POWER_OFF_NOTIFY;
1044 /* Power Sustenance support at bit 5. */
1045 if (reg_buf[1] & BIT(5))
1046 card->ext_power.feature_support |= SD_EXT_POWER_SUSTENANCE;
1048 /* Power Down Mode support at bit 6. */
1049 if (reg_buf[1] & BIT(6))
1050 card->ext_power.feature_support |= SD_EXT_POWER_DOWN_MODE;
1052 card->ext_power.fno = fno;
1053 card->ext_power.page = page;
1054 card->ext_power.offset = offset;
1061 static int sd_parse_ext_reg_perf(struct mmc_card *card, u8 fno, u8 page,
1067 reg_buf = kzalloc(512, GFP_KERNEL);
1071 err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
1073 pr_warn("%s: error %d reading PERF func of ext reg\n",
1074 mmc_hostname(card->host), err);
1078 /* PERF revision. */
1079 card->ext_perf.rev = reg_buf[0];
1081 /* FX_EVENT support at bit 0. */
1082 if (reg_buf[1] & BIT(0))
1083 card->ext_perf.feature_support |= SD_EXT_PERF_FX_EVENT;
1085 /* Card initiated self-maintenance support at bit 0. */
1086 if (reg_buf[2] & BIT(0))
1087 card->ext_perf.feature_support |= SD_EXT_PERF_CARD_MAINT;
1089 /* Host initiated self-maintenance support at bit 1. */
1090 if (reg_buf[2] & BIT(1))
1091 card->ext_perf.feature_support |= SD_EXT_PERF_HOST_MAINT;
1093 /* Cache support at bit 0. */
1094 if (reg_buf[4] & BIT(0))
1095 card->ext_perf.feature_support |= SD_EXT_PERF_CACHE;
1097 /* Command queue support indicated via queue depth bits (0 to 4). */
1098 if (reg_buf[6] & 0x1f)
1099 card->ext_perf.feature_support |= SD_EXT_PERF_CMD_QUEUE;
1101 card->ext_perf.fno = fno;
1102 card->ext_perf.page = page;
1103 card->ext_perf.offset = offset;
1110 static int sd_parse_ext_reg(struct mmc_card *card, u8 *gen_info_buf,
1113 u8 num_regs, fno, page;
1114 u16 sfc, offset, ext = *next_ext_addr;
1118 * Parse only one register set per extension, as that is sufficient to
1119 * support the standard functions. This means another 48 bytes in the
1120 * buffer must be available.
1125 /* Standard Function Code */
1126 memcpy(&sfc, &gen_info_buf[ext], 2);
1128 /* Address to the next extension. */
1129 memcpy(next_ext_addr, &gen_info_buf[ext + 40], 2);
1131 /* Number of registers for this extension. */
1132 num_regs = gen_info_buf[ext + 42];
1134 /* We support only one register per extension. */
1138 /* Extension register address. */
1139 memcpy(®_addr, &gen_info_buf[ext + 44], 4);
1141 /* 9 bits (0 to 8) contains the offset address. */
1142 offset = reg_addr & 0x1ff;
1144 /* 8 bits (9 to 16) contains the page number. */
1145 page = reg_addr >> 9 & 0xff ;
1147 /* 4 bits (18 to 21) contains the function number. */
1148 fno = reg_addr >> 18 & 0xf;
1150 /* Standard Function Code for power management. */
1152 return sd_parse_ext_reg_power(card, fno, page, offset);
1154 /* Standard Function Code for performance enhancement. */
1156 return sd_parse_ext_reg_perf(card, fno, page, offset);
1161 static int sd_read_ext_regs(struct mmc_card *card)
1164 u8 num_ext, *gen_info_buf;
1165 u16 rev, len, next_ext_addr;
1167 if (mmc_host_is_spi(card->host))
1170 if (!(card->scr.cmds & SD_SCR_CMD48_SUPPORT))
1173 gen_info_buf = kzalloc(512, GFP_KERNEL);
1178 * Read 512 bytes of general info, which is found at function number 0,
1179 * at page 0 and with no offset.
1181 err = sd_read_ext_reg(card, 0, 0, 0, 512, gen_info_buf);
1183 pr_warn("%s: error %d reading general info of SD ext reg\n",
1184 mmc_hostname(card->host), err);
1188 /* General info structure revision. */
1189 memcpy(&rev, &gen_info_buf[0], 2);
1191 /* Length of general info in bytes. */
1192 memcpy(&len, &gen_info_buf[2], 2);
1194 /* Number of extensions to be find. */
1195 num_ext = gen_info_buf[4];
1197 /* We support revision 0, but limit it to 512 bytes for simplicity. */
1198 if (rev != 0 || len > 512) {
1199 pr_warn("%s: non-supported SD ext reg layout\n",
1200 mmc_hostname(card->host));
1205 * Parse the extension registers. The first extension should start
1206 * immediately after the general info header (16 bytes).
1209 for (i = 0; i < num_ext; i++) {
1210 err = sd_parse_ext_reg(card, gen_info_buf, &next_ext_addr);
1212 pr_warn("%s: error %d parsing SD ext reg\n",
1213 mmc_hostname(card->host), err);
1219 kfree(gen_info_buf);
1224 * Handle the detection and initialisation of a card.
1226 * In the case of a resume, "oldcard" will contain the card
1227 * we're trying to reinitialise.
1229 static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
1230 struct mmc_card *oldcard)
1232 struct mmc_card *card;
1236 bool v18_fixup_failed = false;
1238 WARN_ON(!host->claimed);
1240 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
1245 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1246 pr_debug("%s: Perhaps the card was replaced\n",
1247 mmc_hostname(host));
1254 * Allocate card structure.
1256 card = mmc_alloc_card(host, &sd_type);
1258 return PTR_ERR(card);
1261 card->type = MMC_TYPE_SD;
1262 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1266 * Call the optional HC's init_card function to handle quirks.
1268 if (host->ops->init_card)
1269 host->ops->init_card(host, card);
1272 * For native busses: get card RCA and quit open drain mode.
1274 if (!mmc_host_is_spi(host)) {
1275 err = mmc_send_relative_addr(host, &card->rca);
1281 err = mmc_sd_get_csd(card);
1285 mmc_decode_cid(card);
1289 * handling only for cards supporting DSR and hosts requesting
1292 if (card->csd.dsr_imp && host->dsr_req)
1296 * Select card, as all following commands rely on that.
1298 if (!mmc_host_is_spi(host)) {
1299 err = mmc_select_card(card);
1304 err = mmc_sd_setup_card(host, card, oldcard != NULL);
1309 * If the card has not been power cycled, it may still be using 1.8V
1310 * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
1313 if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
1314 mmc_sd_card_using_v18(card) &&
1315 host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1317 * Re-read switch information in case it has changed since
1318 * oldcard was initialized.
1321 err = mmc_read_switch(card);
1325 if (mmc_sd_card_using_v18(card)) {
1326 if (mmc_host_set_uhs_voltage(host) ||
1327 mmc_sd_init_uhs_card(card)) {
1328 v18_fixup_failed = true;
1329 mmc_power_cycle(host, ocr);
1331 mmc_remove_card(card);
1338 /* Initialization sequence for UHS-I cards */
1339 if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
1340 err = mmc_sd_init_uhs_card(card);
1345 * Attempt to change to high-speed (if supported)
1347 err = mmc_sd_switch_hs(card);
1349 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
1356 mmc_set_clock(host, mmc_sd_get_max_clock(card));
1359 * Switch to wider bus (if supported).
1361 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
1362 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
1363 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
1367 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
1372 /* Read/parse the extension registers. */
1373 err = sd_read_ext_regs(card);
1378 if (host->cqe_ops && !host->cqe_enabled) {
1379 err = host->cqe_ops->cqe_enable(host, card);
1381 host->cqe_enabled = true;
1382 host->hsq_enabled = true;
1383 pr_info("%s: Host Software Queue enabled\n",
1384 mmc_hostname(host));
1388 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1389 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1390 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1391 mmc_hostname(host));
1401 mmc_remove_card(card);
1407 * Host is being removed. Free up the current card.
1409 static void mmc_sd_remove(struct mmc_host *host)
1411 mmc_remove_card(host->card);
1416 * Card detection - card is alive.
1418 static int mmc_sd_alive(struct mmc_host *host)
1420 return mmc_send_status(host->card, NULL);
1424 * Card detection callback from host.
1426 static void mmc_sd_detect(struct mmc_host *host)
1430 mmc_get_card(host->card, NULL);
1433 * Just check if our card has been removed.
1435 err = _mmc_detect_card_removed(host);
1437 mmc_put_card(host->card, NULL);
1440 mmc_sd_remove(host);
1442 mmc_claim_host(host);
1443 mmc_detach_bus(host);
1444 mmc_power_off(host);
1445 mmc_release_host(host);
1449 static int _mmc_sd_suspend(struct mmc_host *host)
1453 mmc_claim_host(host);
1455 if (mmc_card_suspended(host->card))
1458 if (!mmc_host_is_spi(host))
1459 err = mmc_deselect_cards(host);
1462 mmc_power_off(host);
1463 mmc_card_set_suspended(host->card);
1467 mmc_release_host(host);
1472 * Callback for suspend
1474 static int mmc_sd_suspend(struct mmc_host *host)
1478 err = _mmc_sd_suspend(host);
1480 pm_runtime_disable(&host->card->dev);
1481 pm_runtime_set_suspended(&host->card->dev);
1488 * This function tries to determine if the same card is still present
1489 * and, if so, restore all state to it.
1491 static int _mmc_sd_resume(struct mmc_host *host)
1495 mmc_claim_host(host);
1497 if (!mmc_card_suspended(host->card))
1500 mmc_power_up(host, host->card->ocr);
1501 err = mmc_sd_init_card(host, host->card->ocr, host->card);
1502 mmc_card_clr_suspended(host->card);
1505 mmc_release_host(host);
1510 * Callback for resume
1512 static int mmc_sd_resume(struct mmc_host *host)
1514 pm_runtime_enable(&host->card->dev);
1519 * Callback for runtime_suspend.
1521 static int mmc_sd_runtime_suspend(struct mmc_host *host)
1525 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1528 err = _mmc_sd_suspend(host);
1530 pr_err("%s: error %d doing aggressive suspend\n",
1531 mmc_hostname(host), err);
1537 * Callback for runtime_resume.
1539 static int mmc_sd_runtime_resume(struct mmc_host *host)
1543 err = _mmc_sd_resume(host);
1544 if (err && err != -ENOMEDIUM)
1545 pr_err("%s: error %d doing runtime resume\n",
1546 mmc_hostname(host), err);
1551 static int mmc_sd_hw_reset(struct mmc_host *host)
1553 mmc_power_cycle(host, host->card->ocr);
1554 return mmc_sd_init_card(host, host->card->ocr, host->card);
1557 static const struct mmc_bus_ops mmc_sd_ops = {
1558 .remove = mmc_sd_remove,
1559 .detect = mmc_sd_detect,
1560 .runtime_suspend = mmc_sd_runtime_suspend,
1561 .runtime_resume = mmc_sd_runtime_resume,
1562 .suspend = mmc_sd_suspend,
1563 .resume = mmc_sd_resume,
1564 .alive = mmc_sd_alive,
1565 .shutdown = mmc_sd_suspend,
1566 .hw_reset = mmc_sd_hw_reset,
1570 * Starting point for SD card init.
1572 int mmc_attach_sd(struct mmc_host *host)
1577 WARN_ON(!host->claimed);
1579 err = mmc_send_app_op_cond(host, 0, &ocr);
1583 mmc_attach_bus(host, &mmc_sd_ops);
1584 if (host->ocr_avail_sd)
1585 host->ocr_avail = host->ocr_avail_sd;
1588 * We need to get OCR a different way for SPI.
1590 if (mmc_host_is_spi(host)) {
1593 err = mmc_spi_read_ocr(host, 0, &ocr);
1599 * Some SD cards claims an out of spec VDD voltage range. Let's treat
1600 * these bits as being in-valid and especially also bit7.
1604 rocr = mmc_select_voltage(host, ocr);
1607 * Can we support the voltage(s) of the card(s)?
1615 * Detect and init the card.
1617 err = mmc_sd_init_card(host, rocr, NULL);
1621 mmc_release_host(host);
1622 err = mmc_add_card(host->card);
1626 mmc_claim_host(host);
1630 mmc_remove_card(host->card);
1632 mmc_claim_host(host);
1634 mmc_detach_bus(host);
1636 pr_err("%s: error %d whilst initialising SD card\n",
1637 mmc_hostname(host), err);