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>
15 #include <linux/random.h>
16 #include <linux/scatterlist.h>
17 #include <linux/sysfs.h>
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/card.h>
21 #include <linux/mmc/mmc.h>
22 #include <linux/mmc/sd.h>
32 static const unsigned int tran_exp[] = {
33 10000, 100000, 1000000, 10000000,
37 static const unsigned char tran_mant[] = {
38 0, 10, 12, 13, 15, 20, 25, 30,
39 35, 40, 45, 50, 55, 60, 70, 80,
42 static const unsigned int taac_exp[] = {
43 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
46 static const unsigned int taac_mant[] = {
47 0, 10, 12, 13, 15, 20, 25, 30,
48 35, 40, 45, 50, 55, 60, 70, 80,
51 static const unsigned int sd_au_size[] = {
52 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512,
53 SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512,
54 SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
55 SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512,
58 #define UNSTUFF_BITS(resp,start,size) \
60 const int __size = size; \
61 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
62 const int __off = 3 - ((start) / 32); \
63 const int __shft = (start) & 31; \
66 __res = resp[__off] >> __shft; \
67 if (__size + __shft > 32) \
68 __res |= resp[__off-1] << ((32 - __shft) % 32); \
72 #define SD_POWEROFF_NOTIFY_TIMEOUT_MS 1000
73 #define SD_WRITE_EXTR_SINGLE_TIMEOUT_MS 1000
76 struct mmc_card *card;
81 * Given the decoded CSD structure, decode the raw CID to our CID structure.
83 void mmc_decode_cid(struct mmc_card *card)
85 u32 *resp = card->raw_cid;
88 * Add the raw card ID (cid) data to the entropy pool. It doesn't
89 * matter that not all of it is unique, it's just bonus entropy.
91 add_device_randomness(&card->raw_cid, sizeof(card->raw_cid));
94 * SD doesn't currently have a version field so we will
95 * have to assume we can parse this.
97 card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
98 card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
99 card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
100 card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
101 card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
102 card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
103 card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
104 card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
105 card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
106 card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
107 card->cid.year = UNSTUFF_BITS(resp, 12, 8);
108 card->cid.month = UNSTUFF_BITS(resp, 8, 4);
110 card->cid.year += 2000; /* SD cards year offset */
114 * Given a 128-bit response, decode to our card CSD structure.
116 static int mmc_decode_csd(struct mmc_card *card)
118 struct mmc_csd *csd = &card->csd;
119 unsigned int e, m, csd_struct;
120 u32 *resp = card->raw_csd;
122 csd_struct = UNSTUFF_BITS(resp, 126, 2);
124 switch (csd_struct) {
126 m = UNSTUFF_BITS(resp, 115, 4);
127 e = UNSTUFF_BITS(resp, 112, 3);
128 csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
129 csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
131 m = UNSTUFF_BITS(resp, 99, 4);
132 e = UNSTUFF_BITS(resp, 96, 3);
133 csd->max_dtr = tran_exp[e] * tran_mant[m];
134 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
136 e = UNSTUFF_BITS(resp, 47, 3);
137 m = UNSTUFF_BITS(resp, 62, 12);
138 csd->capacity = (1 + m) << (e + 2);
140 csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
141 csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
142 csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
143 csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
144 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
145 csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
146 csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
147 csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
149 if (UNSTUFF_BITS(resp, 46, 1)) {
151 } else if (csd->write_blkbits >= 9) {
152 csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
153 csd->erase_size <<= csd->write_blkbits - 9;
156 if (UNSTUFF_BITS(resp, 13, 1))
157 mmc_card_set_readonly(card);
161 * This is a block-addressed SDHC or SDXC card. Most
162 * interesting fields are unused and have fixed
163 * values. To avoid getting tripped by buggy cards,
164 * we assume those fixed values ourselves.
166 mmc_card_set_blockaddr(card);
168 csd->taac_ns = 0; /* Unused */
169 csd->taac_clks = 0; /* Unused */
171 m = UNSTUFF_BITS(resp, 99, 4);
172 e = UNSTUFF_BITS(resp, 96, 3);
173 csd->max_dtr = tran_exp[e] * tran_mant[m];
174 csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
175 csd->c_size = UNSTUFF_BITS(resp, 48, 22);
177 /* SDXC cards have a minimum C_SIZE of 0x00FFFF */
178 if (csd->c_size >= 0xFFFF)
179 mmc_card_set_ext_capacity(card);
181 m = UNSTUFF_BITS(resp, 48, 22);
182 csd->capacity = (1 + m) << 10;
184 csd->read_blkbits = 9;
185 csd->read_partial = 0;
186 csd->write_misalign = 0;
187 csd->read_misalign = 0;
188 csd->r2w_factor = 4; /* Unused */
189 csd->write_blkbits = 9;
190 csd->write_partial = 0;
193 if (UNSTUFF_BITS(resp, 13, 1))
194 mmc_card_set_readonly(card);
197 pr_err("%s: unrecognised CSD structure version %d\n",
198 mmc_hostname(card->host), csd_struct);
202 card->erase_size = csd->erase_size;
208 * Given a 64-bit response, decode to our card SCR structure.
210 static int mmc_decode_scr(struct mmc_card *card)
212 struct sd_scr *scr = &card->scr;
213 unsigned int scr_struct;
216 resp[3] = card->raw_scr[1];
217 resp[2] = card->raw_scr[0];
219 scr_struct = UNSTUFF_BITS(resp, 60, 4);
220 if (scr_struct != 0) {
221 pr_err("%s: unrecognised SCR structure version %d\n",
222 mmc_hostname(card->host), scr_struct);
226 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
227 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
228 if (scr->sda_vsn == SCR_SPEC_VER_2)
229 /* Check if Physical Layer Spec v3.0 is supported */
230 scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
232 if (scr->sda_spec3) {
233 scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1);
234 scr->sda_specx = UNSTUFF_BITS(resp, 38, 4);
237 if (UNSTUFF_BITS(resp, 55, 1))
238 card->erased_byte = 0xFF;
240 card->erased_byte = 0x0;
243 scr->cmds = UNSTUFF_BITS(resp, 32, 4);
244 else if (scr->sda_spec3)
245 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
247 /* SD Spec says: any SD Card shall set at least bits 0 and 2 */
248 if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) ||
249 !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) {
250 pr_err("%s: invalid bus width\n", mmc_hostname(card->host));
258 * Fetch and process SD Status register.
260 static int mmc_read_ssr(struct mmc_card *card)
262 unsigned int au, es, et, eo;
268 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
269 pr_warn("%s: card lacks mandatory SD Status function\n",
270 mmc_hostname(card->host));
274 raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
278 if (mmc_app_sd_status(card, raw_ssr)) {
279 pr_warn("%s: problem reading SD Status register\n",
280 mmc_hostname(card->host));
285 for (i = 0; i < 16; i++)
286 card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
291 * UNSTUFF_BITS only works with four u32s so we have to offset the
292 * bitfield positions accordingly.
294 au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4);
296 if (au <= 9 || card->scr.sda_spec3) {
297 card->ssr.au = sd_au_size[au];
298 es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16);
299 et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6);
301 eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2);
302 card->ssr.erase_timeout = (et * 1000) / es;
303 card->ssr.erase_offset = eo * 1000;
306 pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
307 mmc_hostname(card->host));
312 * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set
314 resp[3] = card->raw_ssr[6];
315 discard_support = UNSTUFF_BITS(resp, 313 - 288, 1);
316 card->erase_arg = (card->scr.sda_specx && discard_support) ?
317 SD_DISCARD_ARG : SD_ERASE_ARG;
323 * Fetches and decodes switch information
325 static int mmc_read_switch(struct mmc_card *card)
330 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
333 if (!(card->csd.cmdclass & CCC_SWITCH)) {
334 pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
335 mmc_hostname(card->host));
339 status = kmalloc(64, GFP_KERNEL);
344 * Find out the card's support bits with a mode 0 operation.
345 * The argument does not matter, as the support bits do not
346 * change with the arguments.
348 err = mmc_sd_switch(card, 0, 0, 0, status);
351 * If the host or the card can't do the switch,
352 * fail more gracefully.
354 if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
357 pr_warn("%s: problem reading Bus Speed modes\n",
358 mmc_hostname(card->host));
364 if (status[13] & SD_MODE_HIGH_SPEED)
365 card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
367 if (card->scr.sda_spec3) {
368 card->sw_caps.sd3_bus_mode = status[13];
369 /* Driver Strengths supported by the card */
370 card->sw_caps.sd3_drv_type = status[9];
371 card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
381 * Test if the card supports high-speed mode and, if so, switch to it.
383 int mmc_sd_switch_hs(struct mmc_card *card)
388 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
391 if (!(card->csd.cmdclass & CCC_SWITCH))
394 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
397 if (card->sw_caps.hs_max_dtr == 0)
400 status = kmalloc(64, GFP_KERNEL);
404 err = mmc_sd_switch(card, 1, 0, HIGH_SPEED_BUS_SPEED, status);
408 if ((status[16] & 0xF) != HIGH_SPEED_BUS_SPEED) {
409 pr_warn("%s: Problem switching card into high-speed mode!\n",
410 mmc_hostname(card->host));
422 static int sd_select_driver_type(struct mmc_card *card, u8 *status)
424 int card_drv_type, drive_strength, drv_type;
427 card->drive_strength = 0;
429 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
431 drive_strength = mmc_select_drive_strength(card,
432 card->sw_caps.uhs_max_dtr,
433 card_drv_type, &drv_type);
435 if (drive_strength) {
436 err = mmc_sd_switch(card, 1, 2, drive_strength, status);
439 if ((status[15] & 0xF) != drive_strength) {
440 pr_warn("%s: Problem setting drive strength!\n",
441 mmc_hostname(card->host));
444 card->drive_strength = drive_strength;
448 mmc_set_driver_type(card->host, drv_type);
453 static void sd_update_bus_speed_mode(struct mmc_card *card)
456 * If the host doesn't support any of the UHS-I modes, fallback on
459 if (!mmc_host_uhs(card->host)) {
460 card->sd_bus_speed = 0;
464 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
465 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
466 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
467 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
468 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
469 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
470 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
471 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
472 SD_MODE_UHS_SDR50)) {
473 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
474 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
475 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
476 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
477 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
478 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
479 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
480 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
481 SD_MODE_UHS_SDR12)) {
482 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
486 static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
489 unsigned int timing = 0;
491 switch (card->sd_bus_speed) {
492 case UHS_SDR104_BUS_SPEED:
493 timing = MMC_TIMING_UHS_SDR104;
494 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
496 case UHS_DDR50_BUS_SPEED:
497 timing = MMC_TIMING_UHS_DDR50;
498 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
500 case UHS_SDR50_BUS_SPEED:
501 timing = MMC_TIMING_UHS_SDR50;
502 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
504 case UHS_SDR25_BUS_SPEED:
505 timing = MMC_TIMING_UHS_SDR25;
506 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
508 case UHS_SDR12_BUS_SPEED:
509 timing = MMC_TIMING_UHS_SDR12;
510 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
516 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
520 if ((status[16] & 0xF) != card->sd_bus_speed)
521 pr_warn("%s: Problem setting bus speed mode!\n",
522 mmc_hostname(card->host));
524 mmc_set_timing(card->host, timing);
525 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
531 /* Get host's max current setting at its current voltage */
532 static u32 sd_get_host_max_current(struct mmc_host *host)
534 u32 voltage, max_current;
536 voltage = 1 << host->ios.vdd;
538 case MMC_VDD_165_195:
539 max_current = host->max_current_180;
543 max_current = host->max_current_300;
547 max_current = host->max_current_330;
556 static int sd_set_current_limit(struct mmc_card *card, u8 *status)
558 int current_limit = SD_SET_CURRENT_NO_CHANGE;
563 * Current limit switch is only defined for SDR50, SDR104, and DDR50
564 * bus speed modes. For other bus speed modes, we do not change the
567 if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
568 (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
569 (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
573 * Host has different current capabilities when operating at
574 * different voltages, so find out its max current first.
576 max_current = sd_get_host_max_current(card->host);
579 * We only check host's capability here, if we set a limit that is
580 * higher than the card's maximum current, the card will be using its
581 * maximum current, e.g. if the card's maximum current is 300ma, and
582 * when we set current limit to 200ma, the card will draw 200ma, and
583 * when we set current limit to 400/600/800ma, the card will draw its
584 * maximum 300ma from the host.
586 * The above is incorrect: if we try to set a current limit that is
587 * not supported by the card, the card can rightfully error out the
588 * attempt, and remain at the default current limit. This results
589 * in a 300mA card being limited to 200mA even though the host
590 * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
591 * an iMX6 host. --rmk
593 if (max_current >= 800 &&
594 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
595 current_limit = SD_SET_CURRENT_LIMIT_800;
596 else if (max_current >= 600 &&
597 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
598 current_limit = SD_SET_CURRENT_LIMIT_600;
599 else if (max_current >= 400 &&
600 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
601 current_limit = SD_SET_CURRENT_LIMIT_400;
602 else if (max_current >= 200 &&
603 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
604 current_limit = SD_SET_CURRENT_LIMIT_200;
606 if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
607 err = mmc_sd_switch(card, 1, 3, current_limit, status);
611 if (((status[15] >> 4) & 0x0F) != current_limit)
612 pr_warn("%s: Problem setting current limit!\n",
613 mmc_hostname(card->host));
621 * UHS-I specific initialization procedure
623 static int mmc_sd_init_uhs_card(struct mmc_card *card)
628 if (!(card->csd.cmdclass & CCC_SWITCH))
631 status = kmalloc(64, GFP_KERNEL);
635 /* Set 4-bit bus width */
636 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
640 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
643 * Select the bus speed mode depending on host
644 * and card capability.
646 sd_update_bus_speed_mode(card);
648 /* Set the driver strength for the card */
649 err = sd_select_driver_type(card, status);
653 /* Set current limit for the card */
654 err = sd_set_current_limit(card, status);
658 /* Set bus speed mode of the card */
659 err = sd_set_bus_speed_mode(card, status);
664 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
665 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
667 if (!mmc_host_is_spi(card->host) &&
668 (card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
669 card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
670 card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
671 err = mmc_execute_tuning(card);
674 * As SD Specifications Part1 Physical Layer Specification
675 * Version 3.01 says, CMD19 tuning is available for unlocked
676 * cards in transfer state of 1.8V signaling mode. The small
677 * difference between v3.00 and 3.01 spec means that CMD19
678 * tuning is also available for DDR50 mode.
680 if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
681 pr_warn("%s: ddr50 tuning failed\n",
682 mmc_hostname(card->host));
693 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
694 card->raw_cid[2], card->raw_cid[3]);
695 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
696 card->raw_csd[2], card->raw_csd[3]);
697 MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
699 "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n",
700 card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2],
701 card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5],
702 card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8],
703 card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11],
704 card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14],
706 MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
707 MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
708 MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
709 MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
710 MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
711 MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
712 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
713 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
714 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
715 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
716 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
719 static ssize_t mmc_dsr_show(struct device *dev, struct device_attribute *attr,
722 struct mmc_card *card = mmc_dev_to_card(dev);
723 struct mmc_host *host = card->host;
725 if (card->csd.dsr_imp && host->dsr_req)
726 return sysfs_emit(buf, "0x%x\n", host->dsr);
727 /* return default DSR value */
728 return sysfs_emit(buf, "0x%x\n", 0x404);
731 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
733 MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
734 MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
735 MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
737 #define sdio_info_attr(num) \
738 static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \
740 struct mmc_card *card = mmc_dev_to_card(dev); \
742 if (num > card->num_info) \
744 if (!card->info[num - 1][0]) \
746 return sysfs_emit(buf, "%s\n", card->info[num - 1]); \
748 static DEVICE_ATTR_RO(info##num)
755 static struct attribute *sd_std_attrs[] = {
756 &dev_attr_vendor.attr,
757 &dev_attr_device.attr,
758 &dev_attr_revision.attr,
759 &dev_attr_info1.attr,
760 &dev_attr_info2.attr,
761 &dev_attr_info3.attr,
762 &dev_attr_info4.attr,
768 &dev_attr_erase_size.attr,
769 &dev_attr_preferred_erase_size.attr,
770 &dev_attr_fwrev.attr,
771 &dev_attr_hwrev.attr,
772 &dev_attr_manfid.attr,
774 &dev_attr_oemid.attr,
775 &dev_attr_serial.attr,
782 static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr,
785 struct device *dev = kobj_to_dev(kobj);
786 struct mmc_card *card = mmc_dev_to_card(dev);
788 /* CIS vendor and device ids, revision and info string are available only for Combo cards */
789 if ((attr == &dev_attr_vendor.attr ||
790 attr == &dev_attr_device.attr ||
791 attr == &dev_attr_revision.attr ||
792 attr == &dev_attr_info1.attr ||
793 attr == &dev_attr_info2.attr ||
794 attr == &dev_attr_info3.attr ||
795 attr == &dev_attr_info4.attr
796 ) &&!mmc_card_sd_combo(card))
802 static const struct attribute_group sd_std_group = {
803 .attrs = sd_std_attrs,
804 .is_visible = sd_std_is_visible,
806 __ATTRIBUTE_GROUPS(sd_std);
808 struct device_type sd_type = {
809 .groups = sd_std_groups,
813 * Fetch CID from card.
815 int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
825 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
829 * Since we're changing the OCR value, we seem to
830 * need to tell some cards to go back to the idle
831 * state. We wait 1ms to give cards time to
837 * If SD_SEND_IF_COND indicates an SD 2.0
838 * compliant card and we should set bit 30
839 * of the ocr to indicate that we can handle
840 * block-addressed SDHC cards.
842 err = mmc_send_if_cond(host, ocr);
847 * If the host supports one of UHS-I modes, request the card
848 * to switch to 1.8V signaling level. If the card has failed
849 * repeatedly to switch however, skip this.
851 if (retries && mmc_host_uhs(host))
855 * If the host can supply more than 150mA at current voltage,
856 * XPC should be set to 1.
858 max_current = sd_get_host_max_current(host);
859 if (max_current > 150)
862 err = mmc_send_app_op_cond(host, ocr, rocr);
867 * In case the S18A bit is set in the response, let's start the signal
868 * voltage switch procedure. SPI mode doesn't support CMD11.
869 * Note that, according to the spec, the S18A bit is not valid unless
870 * the CCS bit is set as well. We deliberately deviate from the spec in
871 * regards to this, which allows UHS-I to be supported for SDSC cards.
873 if (!mmc_host_is_spi(host) && (ocr & SD_OCR_S18R) &&
874 rocr && (*rocr & SD_ROCR_S18A)) {
875 err = mmc_set_uhs_voltage(host, pocr);
876 if (err == -EAGAIN) {
885 err = mmc_send_cid(host, cid);
889 int mmc_sd_get_csd(struct mmc_card *card)
894 * Fetch CSD from card.
896 err = mmc_send_csd(card, card->raw_csd);
900 err = mmc_decode_csd(card);
907 static int mmc_sd_get_ro(struct mmc_host *host)
912 * Some systems don't feature a write-protect pin and don't need one.
913 * E.g. because they only have micro-SD card slot. For those systems
914 * assume that the SD card is always read-write.
916 if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
919 if (!host->ops->get_ro)
922 ro = host->ops->get_ro(host);
927 int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
934 * Fetch SCR from card.
936 err = mmc_app_send_scr(card);
940 err = mmc_decode_scr(card);
945 * Fetch and process SD Status register.
947 err = mmc_read_ssr(card);
951 /* Erase init depends on CSD and SSR */
952 mmc_init_erase(card);
956 * Fetch switch information from card. Note, sd3_bus_mode can change if
957 * voltage switch outcome changes, so do this always.
959 err = mmc_read_switch(card);
964 * For SPI, enable CRC as appropriate.
965 * This CRC enable is located AFTER the reading of the
966 * card registers because some SDHC cards are not able
967 * to provide valid CRCs for non-512-byte blocks.
969 if (mmc_host_is_spi(host)) {
970 err = mmc_spi_set_crc(host, use_spi_crc);
976 * Check if read-only switch is active.
979 int ro = mmc_sd_get_ro(host);
982 pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
985 mmc_card_set_readonly(card);
992 unsigned mmc_sd_get_max_clock(struct mmc_card *card)
994 unsigned max_dtr = (unsigned int)-1;
996 if (mmc_card_hs(card)) {
997 if (max_dtr > card->sw_caps.hs_max_dtr)
998 max_dtr = card->sw_caps.hs_max_dtr;
999 } else if (max_dtr > card->csd.max_dtr) {
1000 max_dtr = card->csd.max_dtr;
1006 static bool mmc_sd_card_using_v18(struct mmc_card *card)
1009 * According to the SD spec., the Bus Speed Mode (function group 1) bits
1010 * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
1011 * they can be used to determine if the card has already switched to
1014 return card->sw_caps.sd3_bus_mode &
1015 (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
1018 static int sd_write_ext_reg(struct mmc_card *card, u8 fno, u8 page, u16 offset,
1021 struct mmc_host *host = card->host;
1022 struct mmc_request mrq = {};
1023 struct mmc_command cmd = {};
1024 struct mmc_data data = {};
1025 struct scatterlist sg;
1028 reg_buf = kzalloc(512, GFP_KERNEL);
1036 * Arguments of CMD49:
1037 * [31:31] MIO (0 = memory).
1038 * [30:27] FNO (function number).
1039 * [26:26] MW - mask write mode (0 = disable).
1040 * [25:18] page number.
1041 * [17:9] offset address.
1042 * [8:0] length (0 = 1 byte).
1044 cmd.arg = fno << 27 | page << 18 | offset << 9;
1046 /* The first byte in the buffer is the data to be written. */
1047 reg_buf[0] = reg_data;
1049 data.flags = MMC_DATA_WRITE;
1054 sg_init_one(&sg, reg_buf, 512);
1056 cmd.opcode = SD_WRITE_EXTR_SINGLE;
1057 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1059 mmc_set_data_timeout(&data, card);
1060 mmc_wait_for_req(host, &mrq);
1065 * Note that, the SD card is allowed to signal busy on DAT0 up to 1s
1066 * after the CMD49. Although, let's leave this to be managed by the
1078 static int sd_read_ext_reg(struct mmc_card *card, u8 fno, u8 page,
1079 u16 offset, u16 len, u8 *reg_buf)
1084 * Command arguments of CMD48:
1085 * [31:31] MIO (0 = memory).
1086 * [30:27] FNO (function number).
1087 * [26:26] reserved (0).
1088 * [25:18] page number.
1089 * [17:9] offset address.
1090 * [8:0] length (0 = 1 byte, 1ff = 512 bytes).
1092 cmd_args = fno << 27 | page << 18 | offset << 9 | (len -1);
1094 return mmc_send_adtc_data(card, card->host, SD_READ_EXTR_SINGLE,
1095 cmd_args, reg_buf, 512);
1098 static int sd_parse_ext_reg_power(struct mmc_card *card, u8 fno, u8 page,
1104 reg_buf = kzalloc(512, GFP_KERNEL);
1108 /* Read the extension register for power management function. */
1109 err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
1111 pr_warn("%s: error %d reading PM func of ext reg\n",
1112 mmc_hostname(card->host), err);
1116 /* PM revision consists of 4 bits. */
1117 card->ext_power.rev = reg_buf[0] & 0xf;
1119 /* Power Off Notification support at bit 4. */
1120 if (reg_buf[1] & BIT(4))
1121 card->ext_power.feature_support |= SD_EXT_POWER_OFF_NOTIFY;
1123 /* Power Sustenance support at bit 5. */
1124 if (reg_buf[1] & BIT(5))
1125 card->ext_power.feature_support |= SD_EXT_POWER_SUSTENANCE;
1127 /* Power Down Mode support at bit 6. */
1128 if (reg_buf[1] & BIT(6))
1129 card->ext_power.feature_support |= SD_EXT_POWER_DOWN_MODE;
1131 card->ext_power.fno = fno;
1132 card->ext_power.page = page;
1133 card->ext_power.offset = offset;
1140 static int sd_parse_ext_reg_perf(struct mmc_card *card, u8 fno, u8 page,
1146 reg_buf = kzalloc(512, GFP_KERNEL);
1150 err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
1152 pr_warn("%s: error %d reading PERF func of ext reg\n",
1153 mmc_hostname(card->host), err);
1157 /* PERF revision. */
1158 card->ext_perf.rev = reg_buf[0];
1160 /* FX_EVENT support at bit 0. */
1161 if (reg_buf[1] & BIT(0))
1162 card->ext_perf.feature_support |= SD_EXT_PERF_FX_EVENT;
1164 /* Card initiated self-maintenance support at bit 0. */
1165 if (reg_buf[2] & BIT(0))
1166 card->ext_perf.feature_support |= SD_EXT_PERF_CARD_MAINT;
1168 /* Host initiated self-maintenance support at bit 1. */
1169 if (reg_buf[2] & BIT(1))
1170 card->ext_perf.feature_support |= SD_EXT_PERF_HOST_MAINT;
1172 /* Cache support at bit 0. */
1173 if ((reg_buf[4] & BIT(0)) && !mmc_card_broken_sd_cache(card))
1174 card->ext_perf.feature_support |= SD_EXT_PERF_CACHE;
1176 /* Command queue support indicated via queue depth bits (0 to 4). */
1177 if (reg_buf[6] & 0x1f)
1178 card->ext_perf.feature_support |= SD_EXT_PERF_CMD_QUEUE;
1180 card->ext_perf.fno = fno;
1181 card->ext_perf.page = page;
1182 card->ext_perf.offset = offset;
1189 static int sd_parse_ext_reg(struct mmc_card *card, u8 *gen_info_buf,
1192 u8 num_regs, fno, page;
1193 u16 sfc, offset, ext = *next_ext_addr;
1197 * Parse only one register set per extension, as that is sufficient to
1198 * support the standard functions. This means another 48 bytes in the
1199 * buffer must be available.
1204 /* Standard Function Code */
1205 memcpy(&sfc, &gen_info_buf[ext], 2);
1207 /* Address to the next extension. */
1208 memcpy(next_ext_addr, &gen_info_buf[ext + 40], 2);
1210 /* Number of registers for this extension. */
1211 num_regs = gen_info_buf[ext + 42];
1213 /* We support only one register per extension. */
1217 /* Extension register address. */
1218 memcpy(®_addr, &gen_info_buf[ext + 44], 4);
1220 /* 9 bits (0 to 8) contains the offset address. */
1221 offset = reg_addr & 0x1ff;
1223 /* 8 bits (9 to 16) contains the page number. */
1224 page = reg_addr >> 9 & 0xff ;
1226 /* 4 bits (18 to 21) contains the function number. */
1227 fno = reg_addr >> 18 & 0xf;
1229 /* Standard Function Code for power management. */
1231 return sd_parse_ext_reg_power(card, fno, page, offset);
1233 /* Standard Function Code for performance enhancement. */
1235 return sd_parse_ext_reg_perf(card, fno, page, offset);
1240 static int sd_read_ext_regs(struct mmc_card *card)
1243 u8 num_ext, *gen_info_buf;
1244 u16 rev, len, next_ext_addr;
1246 if (mmc_host_is_spi(card->host))
1249 if (!(card->scr.cmds & SD_SCR_CMD48_SUPPORT))
1252 gen_info_buf = kzalloc(512, GFP_KERNEL);
1257 * Read 512 bytes of general info, which is found at function number 0,
1258 * at page 0 and with no offset.
1260 err = sd_read_ext_reg(card, 0, 0, 0, 512, gen_info_buf);
1262 pr_err("%s: error %d reading general info of SD ext reg\n",
1263 mmc_hostname(card->host), err);
1267 /* General info structure revision. */
1268 memcpy(&rev, &gen_info_buf[0], 2);
1270 /* Length of general info in bytes. */
1271 memcpy(&len, &gen_info_buf[2], 2);
1273 /* Number of extensions to be find. */
1274 num_ext = gen_info_buf[4];
1277 * We only support revision 0 and limit it to 512 bytes for simplicity.
1278 * No matter what, let's return zero to allow us to continue using the
1279 * card, even if we can't support the features from the SD function
1280 * extensions registers.
1282 if (rev != 0 || len > 512) {
1283 pr_warn("%s: non-supported SD ext reg layout\n",
1284 mmc_hostname(card->host));
1289 * Parse the extension registers. The first extension should start
1290 * immediately after the general info header (16 bytes).
1293 for (i = 0; i < num_ext; i++) {
1294 err = sd_parse_ext_reg(card, gen_info_buf, &next_ext_addr);
1296 pr_err("%s: error %d parsing SD ext reg\n",
1297 mmc_hostname(card->host), err);
1303 kfree(gen_info_buf);
1307 static bool sd_cache_enabled(struct mmc_host *host)
1309 return host->card->ext_perf.feature_enabled & SD_EXT_PERF_CACHE;
1312 static int sd_flush_cache(struct mmc_host *host)
1314 struct mmc_card *card = host->card;
1315 u8 *reg_buf, fno, page;
1319 if (!sd_cache_enabled(host))
1322 reg_buf = kzalloc(512, GFP_KERNEL);
1327 * Set Flush Cache at bit 0 in the performance enhancement register at
1330 fno = card->ext_perf.fno;
1331 page = card->ext_perf.page;
1332 offset = card->ext_perf.offset + 261;
1334 err = sd_write_ext_reg(card, fno, page, offset, BIT(0));
1336 pr_warn("%s: error %d writing Cache Flush bit\n",
1337 mmc_hostname(host), err);
1341 err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1342 MMC_BUSY_EXTR_SINGLE);
1347 * Read the Flush Cache bit. The card shall reset it, to confirm that
1348 * it's has completed the flushing of the cache.
1350 err = sd_read_ext_reg(card, fno, page, offset, 1, reg_buf);
1352 pr_warn("%s: error %d reading Cache Flush bit\n",
1353 mmc_hostname(host), err);
1357 if (reg_buf[0] & BIT(0))
1364 static int sd_enable_cache(struct mmc_card *card)
1369 card->ext_perf.feature_enabled &= ~SD_EXT_PERF_CACHE;
1371 reg_buf = kzalloc(512, GFP_KERNEL);
1376 * Set Cache Enable at bit 0 in the performance enhancement register at
1379 err = sd_write_ext_reg(card, card->ext_perf.fno, card->ext_perf.page,
1380 card->ext_perf.offset + 260, BIT(0));
1382 pr_warn("%s: error %d writing Cache Enable bit\n",
1383 mmc_hostname(card->host), err);
1387 err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1388 MMC_BUSY_EXTR_SINGLE);
1390 card->ext_perf.feature_enabled |= SD_EXT_PERF_CACHE;
1398 * Handle the detection and initialisation of a card.
1400 * In the case of a resume, "oldcard" will contain the card
1401 * we're trying to reinitialise.
1403 static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
1404 struct mmc_card *oldcard)
1406 struct mmc_card *card;
1410 bool v18_fixup_failed = false;
1412 WARN_ON(!host->claimed);
1414 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
1419 if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1420 pr_debug("%s: Perhaps the card was replaced\n",
1421 mmc_hostname(host));
1428 * Allocate card structure.
1430 card = mmc_alloc_card(host, &sd_type);
1432 return PTR_ERR(card);
1435 card->type = MMC_TYPE_SD;
1436 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
1440 * Call the optional HC's init_card function to handle quirks.
1442 if (host->ops->init_card)
1443 host->ops->init_card(host, card);
1446 * For native busses: get card RCA and quit open drain mode.
1448 if (!mmc_host_is_spi(host)) {
1449 err = mmc_send_relative_addr(host, &card->rca);
1455 err = mmc_sd_get_csd(card);
1459 mmc_decode_cid(card);
1463 * handling only for cards supporting DSR and hosts requesting
1466 if (card->csd.dsr_imp && host->dsr_req)
1470 * Select card, as all following commands rely on that.
1472 if (!mmc_host_is_spi(host)) {
1473 err = mmc_select_card(card);
1478 err = mmc_sd_setup_card(host, card, oldcard != NULL);
1483 * If the card has not been power cycled, it may still be using 1.8V
1484 * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
1487 if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
1488 mmc_sd_card_using_v18(card) &&
1489 host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1490 if (mmc_host_set_uhs_voltage(host) ||
1491 mmc_sd_init_uhs_card(card)) {
1492 v18_fixup_failed = true;
1493 mmc_power_cycle(host, ocr);
1495 mmc_remove_card(card);
1501 /* Initialization sequence for UHS-I cards */
1502 if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
1503 err = mmc_sd_init_uhs_card(card);
1508 * Attempt to change to high-speed (if supported)
1510 err = mmc_sd_switch_hs(card);
1512 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
1519 mmc_set_clock(host, mmc_sd_get_max_clock(card));
1521 if (host->ios.timing == MMC_TIMING_SD_HS &&
1522 host->ops->prepare_sd_hs_tuning) {
1523 err = host->ops->prepare_sd_hs_tuning(host, card);
1529 * Switch to wider bus (if supported).
1531 if ((host->caps & MMC_CAP_4_BIT_DATA) &&
1532 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
1533 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
1537 mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
1540 if (host->ios.timing == MMC_TIMING_SD_HS &&
1541 host->ops->execute_sd_hs_tuning) {
1542 err = host->ops->execute_sd_hs_tuning(host, card);
1549 /* Read/parse the extension registers. */
1550 err = sd_read_ext_regs(card);
1555 /* Enable internal SD cache if supported. */
1556 if (card->ext_perf.feature_support & SD_EXT_PERF_CACHE) {
1557 err = sd_enable_cache(card);
1562 if (host->cqe_ops && !host->cqe_enabled) {
1563 err = host->cqe_ops->cqe_enable(host, card);
1565 host->cqe_enabled = true;
1566 host->hsq_enabled = true;
1567 pr_info("%s: Host Software Queue enabled\n",
1568 mmc_hostname(host));
1572 if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1573 host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1574 pr_err("%s: Host failed to negotiate down from 3.3V\n",
1575 mmc_hostname(host));
1585 mmc_remove_card(card);
1591 * Host is being removed. Free up the current card.
1593 static void mmc_sd_remove(struct mmc_host *host)
1595 mmc_remove_card(host->card);
1600 * Card detection - card is alive.
1602 static int mmc_sd_alive(struct mmc_host *host)
1604 return mmc_send_status(host->card, NULL);
1608 * Card detection callback from host.
1610 static void mmc_sd_detect(struct mmc_host *host)
1614 mmc_get_card(host->card, NULL);
1617 * Just check if our card has been removed.
1619 err = _mmc_detect_card_removed(host);
1621 mmc_put_card(host->card, NULL);
1624 mmc_sd_remove(host);
1626 mmc_claim_host(host);
1627 mmc_detach_bus(host);
1628 mmc_power_off(host);
1629 mmc_release_host(host);
1633 static int sd_can_poweroff_notify(struct mmc_card *card)
1635 return card->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY;
1638 static int sd_busy_poweroff_notify_cb(void *cb_data, bool *busy)
1640 struct sd_busy_data *data = cb_data;
1641 struct mmc_card *card = data->card;
1645 * Read the status register for the power management function. It's at
1646 * one byte offset and is one byte long. The Power Off Notification
1649 err = sd_read_ext_reg(card, card->ext_power.fno, card->ext_power.page,
1650 card->ext_power.offset + 1, 1, data->reg_buf);
1652 pr_warn("%s: error %d reading status reg of PM func\n",
1653 mmc_hostname(card->host), err);
1657 *busy = !(data->reg_buf[0] & BIT(0));
1661 static int sd_poweroff_notify(struct mmc_card *card)
1663 struct sd_busy_data cb_data;
1667 reg_buf = kzalloc(512, GFP_KERNEL);
1672 * Set the Power Off Notification bit in the power management settings
1673 * register at 2 bytes offset.
1675 err = sd_write_ext_reg(card, card->ext_power.fno, card->ext_power.page,
1676 card->ext_power.offset + 2, BIT(0));
1678 pr_warn("%s: error %d writing Power Off Notify bit\n",
1679 mmc_hostname(card->host), err);
1683 /* Find out when the command is completed. */
1684 err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1685 MMC_BUSY_EXTR_SINGLE);
1689 cb_data.card = card;
1690 cb_data.reg_buf = reg_buf;
1691 err = __mmc_poll_for_busy(card->host, 0, SD_POWEROFF_NOTIFY_TIMEOUT_MS,
1692 &sd_busy_poweroff_notify_cb, &cb_data);
1699 static int _mmc_sd_suspend(struct mmc_host *host)
1701 struct mmc_card *card = host->card;
1704 mmc_claim_host(host);
1706 if (mmc_card_suspended(card))
1709 if (sd_can_poweroff_notify(card))
1710 err = sd_poweroff_notify(card);
1711 else if (!mmc_host_is_spi(host))
1712 err = mmc_deselect_cards(host);
1715 mmc_power_off(host);
1716 mmc_card_set_suspended(card);
1720 mmc_release_host(host);
1725 * Callback for suspend
1727 static int mmc_sd_suspend(struct mmc_host *host)
1731 err = _mmc_sd_suspend(host);
1733 pm_runtime_disable(&host->card->dev);
1734 pm_runtime_set_suspended(&host->card->dev);
1741 * This function tries to determine if the same card is still present
1742 * and, if so, restore all state to it.
1744 static int _mmc_sd_resume(struct mmc_host *host)
1748 mmc_claim_host(host);
1750 if (!mmc_card_suspended(host->card))
1753 mmc_power_up(host, host->card->ocr);
1754 err = mmc_sd_init_card(host, host->card->ocr, host->card);
1755 mmc_card_clr_suspended(host->card);
1758 mmc_release_host(host);
1763 * Callback for resume
1765 static int mmc_sd_resume(struct mmc_host *host)
1767 pm_runtime_enable(&host->card->dev);
1772 * Callback for runtime_suspend.
1774 static int mmc_sd_runtime_suspend(struct mmc_host *host)
1778 if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1781 err = _mmc_sd_suspend(host);
1783 pr_err("%s: error %d doing aggressive suspend\n",
1784 mmc_hostname(host), err);
1790 * Callback for runtime_resume.
1792 static int mmc_sd_runtime_resume(struct mmc_host *host)
1796 err = _mmc_sd_resume(host);
1797 if (err && err != -ENOMEDIUM)
1798 pr_err("%s: error %d doing runtime resume\n",
1799 mmc_hostname(host), err);
1804 static int mmc_sd_hw_reset(struct mmc_host *host)
1806 mmc_power_cycle(host, host->card->ocr);
1807 return mmc_sd_init_card(host, host->card->ocr, host->card);
1810 static const struct mmc_bus_ops mmc_sd_ops = {
1811 .remove = mmc_sd_remove,
1812 .detect = mmc_sd_detect,
1813 .runtime_suspend = mmc_sd_runtime_suspend,
1814 .runtime_resume = mmc_sd_runtime_resume,
1815 .suspend = mmc_sd_suspend,
1816 .resume = mmc_sd_resume,
1817 .alive = mmc_sd_alive,
1818 .shutdown = mmc_sd_suspend,
1819 .hw_reset = mmc_sd_hw_reset,
1820 .cache_enabled = sd_cache_enabled,
1821 .flush_cache = sd_flush_cache,
1825 * Starting point for SD card init.
1827 int mmc_attach_sd(struct mmc_host *host)
1832 WARN_ON(!host->claimed);
1834 err = mmc_send_app_op_cond(host, 0, &ocr);
1838 mmc_attach_bus(host, &mmc_sd_ops);
1839 if (host->ocr_avail_sd)
1840 host->ocr_avail = host->ocr_avail_sd;
1843 * We need to get OCR a different way for SPI.
1845 if (mmc_host_is_spi(host)) {
1848 err = mmc_spi_read_ocr(host, 0, &ocr);
1854 * Some SD cards claims an out of spec VDD voltage range. Let's treat
1855 * these bits as being in-valid and especially also bit7.
1859 rocr = mmc_select_voltage(host, ocr);
1862 * Can we support the voltage(s) of the card(s)?
1870 * Detect and init the card.
1872 err = mmc_sd_init_card(host, rocr, NULL);
1876 mmc_release_host(host);
1877 err = mmc_add_card(host->card);
1881 mmc_claim_host(host);
1885 mmc_remove_card(host->card);
1887 mmc_claim_host(host);
1889 mmc_detach_bus(host);
1891 pr_err("%s: error %d whilst initialising SD card\n",
1892 mmc_hostname(host), err);