1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
27ea239d9SPierre Ossman /*
370f10482SPierre Ossman * linux/drivers/mmc/core/sd.c
47ea239d9SPierre Ossman *
57ea239d9SPierre Ossman * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
67ea239d9SPierre Ossman * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
77ea239d9SPierre Ossman * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
87ea239d9SPierre Ossman */
97ea239d9SPierre Ossman
107ea239d9SPierre Ossman #include <linux/err.h>
119288cac0SWolfram Sang #include <linux/sizes.h>
125a0e3ad6STejun Heo #include <linux/slab.h>
130205a904SPaul Gortmaker #include <linux/stat.h>
140cb403a2SUlf Hansson #include <linux/pm_runtime.h>
15ac9d2555SLinus Walleij #include <linux/random.h>
1624b83debSChristoph Hellwig #include <linux/scatterlist.h>
17f5d8a5feSSergey Shtylyov #include <linux/sysfs.h>
187ea239d9SPierre Ossman
197ea239d9SPierre Ossman #include <linux/mmc/host.h>
207ea239d9SPierre Ossman #include <linux/mmc/card.h>
217ea239d9SPierre Ossman #include <linux/mmc/mmc.h>
223373c0aeSPierre Ossman #include <linux/mmc/sd.h>
237ea239d9SPierre Ossman
247ea239d9SPierre Ossman #include "core.h"
254facdde1SUlf Hansson #include "card.h"
265857b29bSUlf Hansson #include "host.h"
274101c16aSPierre Ossman #include "bus.h"
287ea239d9SPierre Ossman #include "mmc_ops.h"
29ce101496SMark Brown #include "sd.h"
307ea239d9SPierre Ossman #include "sd_ops.h"
317ea239d9SPierre Ossman
327ea239d9SPierre Ossman static const unsigned int tran_exp[] = {
337ea239d9SPierre Ossman 10000, 100000, 1000000, 10000000,
347ea239d9SPierre Ossman 0, 0, 0, 0
357ea239d9SPierre Ossman };
367ea239d9SPierre Ossman
377ea239d9SPierre Ossman static const unsigned char tran_mant[] = {
387ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30,
397ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80,
407ea239d9SPierre Ossman };
417ea239d9SPierre Ossman
424406ae21SShawn Lin static const unsigned int taac_exp[] = {
437ea239d9SPierre Ossman 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
447ea239d9SPierre Ossman };
457ea239d9SPierre Ossman
464406ae21SShawn Lin static const unsigned int taac_mant[] = {
477ea239d9SPierre Ossman 0, 10, 12, 13, 15, 20, 25, 30,
487ea239d9SPierre Ossman 35, 40, 45, 50, 55, 60, 70, 80,
497ea239d9SPierre Ossman };
507ea239d9SPierre Ossman
519288cac0SWolfram Sang static const unsigned int sd_au_size[] = {
529288cac0SWolfram Sang 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512,
539288cac0SWolfram Sang SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512,
549288cac0SWolfram Sang SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
559288cac0SWolfram Sang SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512,
569288cac0SWolfram Sang };
579288cac0SWolfram Sang
587ea239d9SPierre Ossman #define UNSTUFF_BITS(resp,start,size) \
597ea239d9SPierre Ossman ({ \
607ea239d9SPierre Ossman const int __size = size; \
617ea239d9SPierre Ossman const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
627ea239d9SPierre Ossman const int __off = 3 - ((start) / 32); \
637ea239d9SPierre Ossman const int __shft = (start) & 31; \
647ea239d9SPierre Ossman u32 __res; \
657ea239d9SPierre Ossman \
667ea239d9SPierre Ossman __res = resp[__off] >> __shft; \
677ea239d9SPierre Ossman if (__size + __shft > 32) \
687ea239d9SPierre Ossman __res |= resp[__off-1] << ((32 - __shft) % 32); \
697ea239d9SPierre Ossman __res & __mask; \
707ea239d9SPierre Ossman })
717ea239d9SPierre Ossman
72379f56c2SAndrey Skvortsov #define SD_POWEROFF_NOTIFY_TIMEOUT_MS 1000
73130206a6SUlf Hansson #define SD_WRITE_EXTR_SINGLE_TIMEOUT_MS 1000
742c5d4276SUlf Hansson
752c5d4276SUlf Hansson struct sd_busy_data {
762c5d4276SUlf Hansson struct mmc_card *card;
772c5d4276SUlf Hansson u8 *reg_buf;
782c5d4276SUlf Hansson };
792c5d4276SUlf Hansson
807ea239d9SPierre Ossman /*
817ea239d9SPierre Ossman * Given the decoded CSD structure, decode the raw CID to our CID structure.
827ea239d9SPierre Ossman */
mmc_decode_cid(struct mmc_card * card)8371578a1eSMichal Miroslaw void mmc_decode_cid(struct mmc_card *card)
847ea239d9SPierre Ossman {
857ea239d9SPierre Ossman u32 *resp = card->raw_cid;
867ea239d9SPierre Ossman
877ea239d9SPierre Ossman /*
88ac9d2555SLinus Walleij * Add the raw card ID (cid) data to the entropy pool. It doesn't
89ac9d2555SLinus Walleij * matter that not all of it is unique, it's just bonus entropy.
90ac9d2555SLinus Walleij */
91ac9d2555SLinus Walleij add_device_randomness(&card->raw_cid, sizeof(card->raw_cid));
92ac9d2555SLinus Walleij
93ac9d2555SLinus Walleij /*
947ea239d9SPierre Ossman * SD doesn't currently have a version field so we will
957ea239d9SPierre Ossman * have to assume we can parse this.
967ea239d9SPierre Ossman */
977ea239d9SPierre Ossman card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
987ea239d9SPierre Ossman card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
997ea239d9SPierre Ossman card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
1007ea239d9SPierre Ossman card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
1017ea239d9SPierre Ossman card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
1027ea239d9SPierre Ossman card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
1037ea239d9SPierre Ossman card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
1047ea239d9SPierre Ossman card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
1057ea239d9SPierre Ossman card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
1067ea239d9SPierre Ossman card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
1077ea239d9SPierre Ossman card->cid.year = UNSTUFF_BITS(resp, 12, 8);
1087ea239d9SPierre Ossman card->cid.month = UNSTUFF_BITS(resp, 8, 4);
1097ea239d9SPierre Ossman
1107ea239d9SPierre Ossman card->cid.year += 2000; /* SD cards year offset */
1117ea239d9SPierre Ossman }
1127ea239d9SPierre Ossman
1137ea239d9SPierre Ossman /*
1147ea239d9SPierre Ossman * Given a 128-bit response, decode to our card CSD structure.
1157ea239d9SPierre Ossman */
mmc_decode_csd(struct mmc_card * card)116bd766312SPierre Ossman static int mmc_decode_csd(struct mmc_card *card)
1177ea239d9SPierre Ossman {
1187ea239d9SPierre Ossman struct mmc_csd *csd = &card->csd;
1197ea239d9SPierre Ossman unsigned int e, m, csd_struct;
1207ea239d9SPierre Ossman u32 *resp = card->raw_csd;
1217ea239d9SPierre Ossman
1227ea239d9SPierre Ossman csd_struct = UNSTUFF_BITS(resp, 126, 2);
1237ea239d9SPierre Ossman
1247ea239d9SPierre Ossman switch (csd_struct) {
1257ea239d9SPierre Ossman case 0:
1267ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 115, 4);
1277ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 112, 3);
1284406ae21SShawn Lin csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10;
1294406ae21SShawn Lin csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
1307ea239d9SPierre Ossman
1317ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4);
1327ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3);
1337ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m];
1347ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
1357ea239d9SPierre Ossman
1367ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 47, 3);
1377ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 62, 12);
1387ea239d9SPierre Ossman csd->capacity = (1 + m) << (e + 2);
1397ea239d9SPierre Ossman
1407ea239d9SPierre Ossman csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
1417ea239d9SPierre Ossman csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
1427ea239d9SPierre Ossman csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
1437ea239d9SPierre Ossman csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
1443d705d14SSascha Hauer csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
1457ea239d9SPierre Ossman csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
1467ea239d9SPierre Ossman csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
1477ea239d9SPierre Ossman csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
148dfe86cbaSAdrian Hunter
149dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 46, 1)) {
150dfe86cbaSAdrian Hunter csd->erase_size = 1;
151dfe86cbaSAdrian Hunter } else if (csd->write_blkbits >= 9) {
152dfe86cbaSAdrian Hunter csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
153dfe86cbaSAdrian Hunter csd->erase_size <<= csd->write_blkbits - 9;
154dfe86cbaSAdrian Hunter }
155917a5336SSeunghui Lee
156917a5336SSeunghui Lee if (UNSTUFF_BITS(resp, 13, 1))
157917a5336SSeunghui Lee mmc_card_set_readonly(card);
1587ea239d9SPierre Ossman break;
1597ea239d9SPierre Ossman case 1:
1607ea239d9SPierre Ossman /*
1613a303511SArindam Nath * This is a block-addressed SDHC or SDXC card. Most
1627ea239d9SPierre Ossman * interesting fields are unused and have fixed
1637ea239d9SPierre Ossman * values. To avoid getting tripped by buggy cards,
1647ea239d9SPierre Ossman * we assume those fixed values ourselves.
1657ea239d9SPierre Ossman */
1667ea239d9SPierre Ossman mmc_card_set_blockaddr(card);
1677ea239d9SPierre Ossman
1684406ae21SShawn Lin csd->taac_ns = 0; /* Unused */
1694406ae21SShawn Lin csd->taac_clks = 0; /* Unused */
1707ea239d9SPierre Ossman
1717ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 99, 4);
1727ea239d9SPierre Ossman e = UNSTUFF_BITS(resp, 96, 3);
1737ea239d9SPierre Ossman csd->max_dtr = tran_exp[e] * tran_mant[m];
1747ea239d9SPierre Ossman csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
1753a303511SArindam Nath csd->c_size = UNSTUFF_BITS(resp, 48, 22);
1763a303511SArindam Nath
1773a303511SArindam Nath /* SDXC cards have a minimum C_SIZE of 0x00FFFF */
1783a303511SArindam Nath if (csd->c_size >= 0xFFFF)
1793a303511SArindam Nath mmc_card_set_ext_capacity(card);
1807ea239d9SPierre Ossman
1817ea239d9SPierre Ossman m = UNSTUFF_BITS(resp, 48, 22);
1827ea239d9SPierre Ossman csd->capacity = (1 + m) << 10;
1837ea239d9SPierre Ossman
1847ea239d9SPierre Ossman csd->read_blkbits = 9;
1857ea239d9SPierre Ossman csd->read_partial = 0;
1867ea239d9SPierre Ossman csd->write_misalign = 0;
1877ea239d9SPierre Ossman csd->read_misalign = 0;
1887ea239d9SPierre Ossman csd->r2w_factor = 4; /* Unused */
1897ea239d9SPierre Ossman csd->write_blkbits = 9;
1907ea239d9SPierre Ossman csd->write_partial = 0;
191dfe86cbaSAdrian Hunter csd->erase_size = 1;
192917a5336SSeunghui Lee
193917a5336SSeunghui Lee if (UNSTUFF_BITS(resp, 13, 1))
194917a5336SSeunghui Lee mmc_card_set_readonly(card);
1957ea239d9SPierre Ossman break;
1967ea239d9SPierre Ossman default:
197a3c76eb9SGirish K S pr_err("%s: unrecognised CSD structure version %d\n",
1987ea239d9SPierre Ossman mmc_hostname(card->host), csd_struct);
199bd766312SPierre Ossman return -EINVAL;
2007ea239d9SPierre Ossman }
201bd766312SPierre Ossman
202dfe86cbaSAdrian Hunter card->erase_size = csd->erase_size;
203dfe86cbaSAdrian Hunter
204bd766312SPierre Ossman return 0;
2057ea239d9SPierre Ossman }
2067ea239d9SPierre Ossman
2077ea239d9SPierre Ossman /*
2087ea239d9SPierre Ossman * Given a 64-bit response, decode to our card SCR structure.
2097ea239d9SPierre Ossman */
mmc_decode_scr(struct mmc_card * card)210bd766312SPierre Ossman static int mmc_decode_scr(struct mmc_card *card)
2117ea239d9SPierre Ossman {
2127ea239d9SPierre Ossman struct sd_scr *scr = &card->scr;
2137ea239d9SPierre Ossman unsigned int scr_struct;
2147ea239d9SPierre Ossman u32 resp[4];
2157ea239d9SPierre Ossman
2167ea239d9SPierre Ossman resp[3] = card->raw_scr[1];
2177ea239d9SPierre Ossman resp[2] = card->raw_scr[0];
2187ea239d9SPierre Ossman
2197ea239d9SPierre Ossman scr_struct = UNSTUFF_BITS(resp, 60, 4);
2207ea239d9SPierre Ossman if (scr_struct != 0) {
221a3c76eb9SGirish K S pr_err("%s: unrecognised SCR structure version %d\n",
2227ea239d9SPierre Ossman mmc_hostname(card->host), scr_struct);
223bd766312SPierre Ossman return -EINVAL;
2247ea239d9SPierre Ossman }
2257ea239d9SPierre Ossman
2267ea239d9SPierre Ossman scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
2277ea239d9SPierre Ossman scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
228013909c4SArindam Nath if (scr->sda_vsn == SCR_SPEC_VER_2)
229013909c4SArindam Nath /* Check if Physical Layer Spec v3.0 is supported */
230013909c4SArindam Nath scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
231bd766312SPierre Ossman
23268539e2bSAvri Altman if (scr->sda_spec3) {
23368539e2bSAvri Altman scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1);
23468539e2bSAvri Altman scr->sda_specx = UNSTUFF_BITS(resp, 38, 4);
23568539e2bSAvri Altman }
23668539e2bSAvri Altman
237dfe86cbaSAdrian Hunter if (UNSTUFF_BITS(resp, 55, 1))
238dfe86cbaSAdrian Hunter card->erased_byte = 0xFF;
239dfe86cbaSAdrian Hunter else
240dfe86cbaSAdrian Hunter card->erased_byte = 0x0;
241dfe86cbaSAdrian Hunter
242dbea8ae9SUlf Hansson if (scr->sda_spec4)
243dbea8ae9SUlf Hansson scr->cmds = UNSTUFF_BITS(resp, 32, 4);
244dbea8ae9SUlf Hansson else if (scr->sda_spec3)
245f0d89972SAndrei Warkentin scr->cmds = UNSTUFF_BITS(resp, 32, 2);
2469e4be8d0SRaul E Rangel
2479e4be8d0SRaul E Rangel /* SD Spec says: any SD Card shall set at least bits 0 and 2 */
2489e4be8d0SRaul E Rangel if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) ||
2499e4be8d0SRaul E Rangel !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) {
2509e4be8d0SRaul E Rangel pr_err("%s: invalid bus width\n", mmc_hostname(card->host));
2519e4be8d0SRaul E Rangel return -EINVAL;
2529e4be8d0SRaul E Rangel }
2539e4be8d0SRaul E Rangel
254bd766312SPierre Ossman return 0;
2557ea239d9SPierre Ossman }
2567ea239d9SPierre Ossman
2577ea239d9SPierre Ossman /*
258dfe86cbaSAdrian Hunter * Fetch and process SD Status register.
259dfe86cbaSAdrian Hunter */
mmc_read_ssr(struct mmc_card * card)260dfe86cbaSAdrian Hunter static int mmc_read_ssr(struct mmc_card *card)
261dfe86cbaSAdrian Hunter {
262dfe86cbaSAdrian Hunter unsigned int au, es, et, eo;
26306c9ccb7SWinkler, Tomas __be32 *raw_ssr;
264bc47e2f6SAvri Altman u32 resp[4] = {};
265bc47e2f6SAvri Altman u8 discard_support;
2665275a652SUri Yanai int i;
267dfe86cbaSAdrian Hunter
268dfe86cbaSAdrian Hunter if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
2696606110dSJoe Perches pr_warn("%s: card lacks mandatory SD Status function\n",
2706606110dSJoe Perches mmc_hostname(card->host));
271dfe86cbaSAdrian Hunter return 0;
272dfe86cbaSAdrian Hunter }
273dfe86cbaSAdrian Hunter
274e85baa88SPaul Burton raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
275e85baa88SPaul Burton if (!raw_ssr)
276e85baa88SPaul Burton return -ENOMEM;
277e85baa88SPaul Burton
278e85baa88SPaul Burton if (mmc_app_sd_status(card, raw_ssr)) {
2796606110dSJoe Perches pr_warn("%s: problem reading SD Status register\n",
2806606110dSJoe Perches mmc_hostname(card->host));
281e85baa88SPaul Burton kfree(raw_ssr);
2825275a652SUri Yanai return 0;
283dfe86cbaSAdrian Hunter }
284dfe86cbaSAdrian Hunter
285dfe86cbaSAdrian Hunter for (i = 0; i < 16; i++)
286e85baa88SPaul Burton card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
287e85baa88SPaul Burton
288e85baa88SPaul Burton kfree(raw_ssr);
289dfe86cbaSAdrian Hunter
290dfe86cbaSAdrian Hunter /*
291dfe86cbaSAdrian Hunter * UNSTUFF_BITS only works with four u32s so we have to offset the
292dfe86cbaSAdrian Hunter * bitfield positions accordingly.
293dfe86cbaSAdrian Hunter */
2945275a652SUri Yanai au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4);
2959288cac0SWolfram Sang if (au) {
2969288cac0SWolfram Sang if (au <= 9 || card->scr.sda_spec3) {
2979288cac0SWolfram Sang card->ssr.au = sd_au_size[au];
2985275a652SUri Yanai es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16);
2995275a652SUri Yanai et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6);
300dfe86cbaSAdrian Hunter if (es && et) {
3015275a652SUri Yanai eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2);
302dfe86cbaSAdrian Hunter card->ssr.erase_timeout = (et * 1000) / es;
303dfe86cbaSAdrian Hunter card->ssr.erase_offset = eo * 1000;
304dfe86cbaSAdrian Hunter }
305dfe86cbaSAdrian Hunter } else {
3066606110dSJoe Perches pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
3079288cac0SWolfram Sang mmc_hostname(card->host));
3089288cac0SWolfram Sang }
309dfe86cbaSAdrian Hunter }
3105275a652SUri Yanai
311bc47e2f6SAvri Altman /*
312bc47e2f6SAvri Altman * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set
313bc47e2f6SAvri Altman */
314bc47e2f6SAvri Altman resp[3] = card->raw_ssr[6];
315bc47e2f6SAvri Altman discard_support = UNSTUFF_BITS(resp, 313 - 288, 1);
316bc47e2f6SAvri Altman card->erase_arg = (card->scr.sda_specx && discard_support) ?
317bc47e2f6SAvri Altman SD_DISCARD_ARG : SD_ERASE_ARG;
31801904ff7SAvri Altman
3195275a652SUri Yanai return 0;
320dfe86cbaSAdrian Hunter }
321dfe86cbaSAdrian Hunter
322dfe86cbaSAdrian Hunter /*
3231addfcdbSPierre Ossman * Fetches and decodes switch information
3247ea239d9SPierre Ossman */
mmc_read_switch(struct mmc_card * card)3251addfcdbSPierre Ossman static int mmc_read_switch(struct mmc_card *card)
3267ea239d9SPierre Ossman {
3277ea239d9SPierre Ossman int err;
3287ea239d9SPierre Ossman u8 *status;
3297ea239d9SPierre Ossman
3303373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1)
33117b0429dSPierre Ossman return 0;
3323373c0aeSPierre Ossman
3333373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH)) {
3346606110dSJoe Perches pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
3353373c0aeSPierre Ossman mmc_hostname(card->host));
33617b0429dSPierre Ossman return 0;
3373373c0aeSPierre Ossman }
3383373c0aeSPierre Ossman
3397ea239d9SPierre Ossman status = kmalloc(64, GFP_KERNEL);
340e1df7ae3SMarkus Elfring if (!status)
34117b0429dSPierre Ossman return -ENOMEM;
3427ea239d9SPierre Ossman
343a39ca6aeSAaron Lu /*
344a39ca6aeSAaron Lu * Find out the card's support bits with a mode 0 operation.
345a39ca6aeSAaron Lu * The argument does not matter, as the support bits do not
346a39ca6aeSAaron Lu * change with the arguments.
347a39ca6aeSAaron Lu */
348a39ca6aeSAaron Lu err = mmc_sd_switch(card, 0, 0, 0, status);
34917b0429dSPierre Ossman if (err) {
350013909c4SArindam Nath /*
351013909c4SArindam Nath * If the host or the card can't do the switch,
352013909c4SArindam Nath * fail more gracefully.
353013909c4SArindam Nath */
354013909c4SArindam Nath if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
355adf66a0dSPierre Ossman goto out;
356adf66a0dSPierre Ossman
3576606110dSJoe Perches pr_warn("%s: problem reading Bus Speed modes\n",
3583373c0aeSPierre Ossman mmc_hostname(card->host));
35917b0429dSPierre Ossman err = 0;
360adf66a0dSPierre Ossman
3617ea239d9SPierre Ossman goto out;
3627ea239d9SPierre Ossman }
3637ea239d9SPierre Ossman
364fffe5d5aSQiang Liu if (status[13] & SD_MODE_HIGH_SPEED)
365fffe5d5aSQiang Liu card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
366f2815f68SSubhash Jadavani
367013909c4SArindam Nath if (card->scr.sda_spec3) {
368013909c4SArindam Nath card->sw_caps.sd3_bus_mode = status[13];
369a39ca6aeSAaron Lu /* Driver Strengths supported by the card */
370013909c4SArindam Nath card->sw_caps.sd3_drv_type = status[9];
371d9812780SRussell King card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
372013909c4SArindam Nath }
3737ea239d9SPierre Ossman
3741addfcdbSPierre Ossman out:
3751addfcdbSPierre Ossman kfree(status);
3761addfcdbSPierre Ossman
3771addfcdbSPierre Ossman return err;
3781addfcdbSPierre Ossman }
3791addfcdbSPierre Ossman
3801addfcdbSPierre Ossman /*
3811addfcdbSPierre Ossman * Test if the card supports high-speed mode and, if so, switch to it.
3821addfcdbSPierre Ossman */
mmc_sd_switch_hs(struct mmc_card * card)38371578a1eSMichal Miroslaw int mmc_sd_switch_hs(struct mmc_card *card)
3841addfcdbSPierre Ossman {
3851addfcdbSPierre Ossman int err;
3861addfcdbSPierre Ossman u8 *status;
3871addfcdbSPierre Ossman
3883373c0aeSPierre Ossman if (card->scr.sda_vsn < SCR_SPEC_VER_1)
38917b0429dSPierre Ossman return 0;
3903373c0aeSPierre Ossman
3913373c0aeSPierre Ossman if (!(card->csd.cmdclass & CCC_SWITCH))
39217b0429dSPierre Ossman return 0;
3933373c0aeSPierre Ossman
3941addfcdbSPierre Ossman if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
39517b0429dSPierre Ossman return 0;
3961addfcdbSPierre Ossman
3971addfcdbSPierre Ossman if (card->sw_caps.hs_max_dtr == 0)
39817b0429dSPierre Ossman return 0;
3991addfcdbSPierre Ossman
4001addfcdbSPierre Ossman status = kmalloc(64, GFP_KERNEL);
401e1df7ae3SMarkus Elfring if (!status)
40217b0429dSPierre Ossman return -ENOMEM;
4031addfcdbSPierre Ossman
4049d624f4fSJisheng Zhang err = mmc_sd_switch(card, 1, 0, HIGH_SPEED_BUS_SPEED, status);
40517b0429dSPierre Ossman if (err)
4067ea239d9SPierre Ossman goto out;
4077ea239d9SPierre Ossman
4089d624f4fSJisheng Zhang if ((status[16] & 0xF) != HIGH_SPEED_BUS_SPEED) {
4096606110dSJoe Perches pr_warn("%s: Problem switching card into high-speed mode!\n",
4107ea239d9SPierre Ossman mmc_hostname(card->host));
41171578a1eSMichal Miroslaw err = 0;
4127ea239d9SPierre Ossman } else {
41371578a1eSMichal Miroslaw err = 1;
4147ea239d9SPierre Ossman }
4157ea239d9SPierre Ossman
4167ea239d9SPierre Ossman out:
4177ea239d9SPierre Ossman kfree(status);
4187ea239d9SPierre Ossman
4197ea239d9SPierre Ossman return err;
4207ea239d9SPierre Ossman }
4217ea239d9SPierre Ossman
sd_select_driver_type(struct mmc_card * card,u8 * status)422d6d50a15SArindam Nath static int sd_select_driver_type(struct mmc_card *card, u8 *status)
423d6d50a15SArindam Nath {
424fa021cefSAdrian Hunter int card_drv_type, drive_strength, drv_type;
425d6d50a15SArindam Nath int err;
426d6d50a15SArindam Nath
4273853a042SAdrian Hunter card->drive_strength = 0;
4283853a042SAdrian Hunter
429fa021cefSAdrian Hunter card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
430ca8e99b3SPhilip Rakity
431e23350b3SAdrian Hunter drive_strength = mmc_select_drive_strength(card,
432ca8e99b3SPhilip Rakity card->sw_caps.uhs_max_dtr,
433e23350b3SAdrian Hunter card_drv_type, &drv_type);
434ca8e99b3SPhilip Rakity
435b4f30a17SAdrian Hunter if (drive_strength) {
436ca8e99b3SPhilip Rakity err = mmc_sd_switch(card, 1, 2, drive_strength, status);
437d6d50a15SArindam Nath if (err)
438d6d50a15SArindam Nath return err;
439ca8e99b3SPhilip Rakity if ((status[15] & 0xF) != drive_strength) {
4406606110dSJoe Perches pr_warn("%s: Problem setting drive strength!\n",
441d6d50a15SArindam Nath mmc_hostname(card->host));
442d6d50a15SArindam Nath return 0;
443d6d50a15SArindam Nath }
4443853a042SAdrian Hunter card->drive_strength = drive_strength;
445b4f30a17SAdrian Hunter }
446d6d50a15SArindam Nath
447b4f30a17SAdrian Hunter if (drv_type)
448b4f30a17SAdrian Hunter mmc_set_driver_type(card->host, drv_type);
449d6d50a15SArindam Nath
450d6d50a15SArindam Nath return 0;
451d6d50a15SArindam Nath }
452d6d50a15SArindam Nath
sd_update_bus_speed_mode(struct mmc_card * card)45393c712f9SSubhash Jadavani static void sd_update_bus_speed_mode(struct mmc_card *card)
45449c468fcSArindam Nath {
45549c468fcSArindam Nath /*
45649c468fcSArindam Nath * If the host doesn't support any of the UHS-I modes, fallback on
45749c468fcSArindam Nath * default speed.
45849c468fcSArindam Nath */
4593f8a7fabSJohan Rudholm if (!mmc_host_uhs(card->host)) {
46093c712f9SSubhash Jadavani card->sd_bus_speed = 0;
46193c712f9SSubhash Jadavani return;
46293c712f9SSubhash Jadavani }
46349c468fcSArindam Nath
46449c468fcSArindam Nath if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
46549c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
46693c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
46749c468fcSArindam Nath } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
46849c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
46993c712f9SSubhash Jadavani card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
47049c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
47149c468fcSArindam Nath MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
47249c468fcSArindam Nath SD_MODE_UHS_SDR50)) {
47393c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
47449c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
47549c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
47649c468fcSArindam Nath (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
47793c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
47849c468fcSArindam Nath } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
47949c468fcSArindam Nath MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
48049c468fcSArindam Nath MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
48149c468fcSArindam Nath SD_MODE_UHS_SDR12)) {
48293c712f9SSubhash Jadavani card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
48393c712f9SSubhash Jadavani }
48449c468fcSArindam Nath }
48549c468fcSArindam Nath
sd_set_bus_speed_mode(struct mmc_card * card,u8 * status)48693c712f9SSubhash Jadavani static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
48793c712f9SSubhash Jadavani {
48893c712f9SSubhash Jadavani int err;
48993c712f9SSubhash Jadavani unsigned int timing = 0;
49093c712f9SSubhash Jadavani
49193c712f9SSubhash Jadavani switch (card->sd_bus_speed) {
49293c712f9SSubhash Jadavani case UHS_SDR104_BUS_SPEED:
49393c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR104;
49493c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
49593c712f9SSubhash Jadavani break;
49693c712f9SSubhash Jadavani case UHS_DDR50_BUS_SPEED:
49793c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_DDR50;
49893c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
49993c712f9SSubhash Jadavani break;
50093c712f9SSubhash Jadavani case UHS_SDR50_BUS_SPEED:
50193c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR50;
50293c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
50393c712f9SSubhash Jadavani break;
50493c712f9SSubhash Jadavani case UHS_SDR25_BUS_SPEED:
50593c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR25;
50693c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
50793c712f9SSubhash Jadavani break;
50893c712f9SSubhash Jadavani case UHS_SDR12_BUS_SPEED:
50993c712f9SSubhash Jadavani timing = MMC_TIMING_UHS_SDR12;
51093c712f9SSubhash Jadavani card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
51193c712f9SSubhash Jadavani break;
51293c712f9SSubhash Jadavani default:
51393c712f9SSubhash Jadavani return 0;
51493c712f9SSubhash Jadavani }
51593c712f9SSubhash Jadavani
51693c712f9SSubhash Jadavani err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
51749c468fcSArindam Nath if (err)
51849c468fcSArindam Nath return err;
51949c468fcSArindam Nath
52093c712f9SSubhash Jadavani if ((status[16] & 0xF) != card->sd_bus_speed)
5216606110dSJoe Perches pr_warn("%s: Problem setting bus speed mode!\n",
52249c468fcSArindam Nath mmc_hostname(card->host));
52349c468fcSArindam Nath else {
52449c468fcSArindam Nath mmc_set_timing(card->host, timing);
52549c468fcSArindam Nath mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
52649c468fcSArindam Nath }
52749c468fcSArindam Nath
52849c468fcSArindam Nath return 0;
52949c468fcSArindam Nath }
53049c468fcSArindam Nath
53155c4665eSAaron Lu /* Get host's max current setting at its current voltage */
sd_get_host_max_current(struct mmc_host * host)53255c4665eSAaron Lu static u32 sd_get_host_max_current(struct mmc_host *host)
53355c4665eSAaron Lu {
53455c4665eSAaron Lu u32 voltage, max_current;
53555c4665eSAaron Lu
53655c4665eSAaron Lu voltage = 1 << host->ios.vdd;
53755c4665eSAaron Lu switch (voltage) {
53855c4665eSAaron Lu case MMC_VDD_165_195:
53955c4665eSAaron Lu max_current = host->max_current_180;
54055c4665eSAaron Lu break;
54155c4665eSAaron Lu case MMC_VDD_29_30:
54255c4665eSAaron Lu case MMC_VDD_30_31:
54355c4665eSAaron Lu max_current = host->max_current_300;
54455c4665eSAaron Lu break;
54555c4665eSAaron Lu case MMC_VDD_32_33:
54655c4665eSAaron Lu case MMC_VDD_33_34:
54755c4665eSAaron Lu max_current = host->max_current_330;
54855c4665eSAaron Lu break;
54955c4665eSAaron Lu default:
55055c4665eSAaron Lu max_current = 0;
55155c4665eSAaron Lu }
55255c4665eSAaron Lu
55355c4665eSAaron Lu return max_current;
55455c4665eSAaron Lu }
55555c4665eSAaron Lu
sd_set_current_limit(struct mmc_card * card,u8 * status)5565371c927SArindam Nath static int sd_set_current_limit(struct mmc_card *card, u8 *status)
5575371c927SArindam Nath {
5580aa67700SPhilip Rakity int current_limit = SD_SET_CURRENT_NO_CHANGE;
5595371c927SArindam Nath int err;
56055c4665eSAaron Lu u32 max_current;
5615371c927SArindam Nath
5625371c927SArindam Nath /*
5635371c927SArindam Nath * Current limit switch is only defined for SDR50, SDR104, and DDR50
5640aa67700SPhilip Rakity * bus speed modes. For other bus speed modes, we do not change the
5650aa67700SPhilip Rakity * current limit.
56655c4665eSAaron Lu */
56755c4665eSAaron Lu if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
56855c4665eSAaron Lu (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
56955c4665eSAaron Lu (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
57055c4665eSAaron Lu return 0;
57155c4665eSAaron Lu
57255c4665eSAaron Lu /*
57355c4665eSAaron Lu * Host has different current capabilities when operating at
57455c4665eSAaron Lu * different voltages, so find out its max current first.
57555c4665eSAaron Lu */
57655c4665eSAaron Lu max_current = sd_get_host_max_current(card->host);
57755c4665eSAaron Lu
57855c4665eSAaron Lu /*
579a39ca6aeSAaron Lu * We only check host's capability here, if we set a limit that is
580a39ca6aeSAaron Lu * higher than the card's maximum current, the card will be using its
581a39ca6aeSAaron Lu * maximum current, e.g. if the card's maximum current is 300ma, and
582a39ca6aeSAaron Lu * when we set current limit to 200ma, the card will draw 200ma, and
583a39ca6aeSAaron Lu * when we set current limit to 400/600/800ma, the card will draw its
584a39ca6aeSAaron Lu * maximum 300ma from the host.
585d9812780SRussell King *
586d9812780SRussell King * The above is incorrect: if we try to set a current limit that is
587d9812780SRussell King * not supported by the card, the card can rightfully error out the
588d9812780SRussell King * attempt, and remain at the default current limit. This results
589d9812780SRussell King * in a 300mA card being limited to 200mA even though the host
590d9812780SRussell King * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
591d9812780SRussell King * an iMX6 host. --rmk
5925371c927SArindam Nath */
593d9812780SRussell King if (max_current >= 800 &&
594d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
5955371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_800;
596d9812780SRussell King else if (max_current >= 600 &&
597d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
5985371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_600;
599d9812780SRussell King else if (max_current >= 400 &&
600d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
6015371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_400;
602d9812780SRussell King else if (max_current >= 200 &&
603d9812780SRussell King card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
6045371c927SArindam Nath current_limit = SD_SET_CURRENT_LIMIT_200;
6055371c927SArindam Nath
6060aa67700SPhilip Rakity if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
6075371c927SArindam Nath err = mmc_sd_switch(card, 1, 3, current_limit, status);
6085371c927SArindam Nath if (err)
6095371c927SArindam Nath return err;
6105371c927SArindam Nath
6115371c927SArindam Nath if (((status[15] >> 4) & 0x0F) != current_limit)
6126606110dSJoe Perches pr_warn("%s: Problem setting current limit!\n",
6135371c927SArindam Nath mmc_hostname(card->host));
6145371c927SArindam Nath
6150aa67700SPhilip Rakity }
616a39ca6aeSAaron Lu
6175371c927SArindam Nath return 0;
6185371c927SArindam Nath }
6195371c927SArindam Nath
620d6d50a15SArindam Nath /*
621d6d50a15SArindam Nath * UHS-I specific initialization procedure
622d6d50a15SArindam Nath */
mmc_sd_init_uhs_card(struct mmc_card * card)623d6d50a15SArindam Nath static int mmc_sd_init_uhs_card(struct mmc_card *card)
624d6d50a15SArindam Nath {
625d6d50a15SArindam Nath int err;
626d6d50a15SArindam Nath u8 *status;
627d6d50a15SArindam Nath
628d6d50a15SArindam Nath if (!(card->csd.cmdclass & CCC_SWITCH))
629d6d50a15SArindam Nath return 0;
630d6d50a15SArindam Nath
631d6d50a15SArindam Nath status = kmalloc(64, GFP_KERNEL);
632e1df7ae3SMarkus Elfring if (!status)
633d6d50a15SArindam Nath return -ENOMEM;
634d6d50a15SArindam Nath
635d6d50a15SArindam Nath /* Set 4-bit bus width */
636d6d50a15SArindam Nath err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
637d6d50a15SArindam Nath if (err)
638d6d50a15SArindam Nath goto out;
639d6d50a15SArindam Nath
640d6d50a15SArindam Nath mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
641d6d50a15SArindam Nath
64293c712f9SSubhash Jadavani /*
64393c712f9SSubhash Jadavani * Select the bus speed mode depending on host
64493c712f9SSubhash Jadavani * and card capability.
64593c712f9SSubhash Jadavani */
64693c712f9SSubhash Jadavani sd_update_bus_speed_mode(card);
64793c712f9SSubhash Jadavani
648d6d50a15SArindam Nath /* Set the driver strength for the card */
649d6d50a15SArindam Nath err = sd_select_driver_type(card, status);
65049c468fcSArindam Nath if (err)
65149c468fcSArindam Nath goto out;
65249c468fcSArindam Nath
65393c712f9SSubhash Jadavani /* Set current limit for the card */
65493c712f9SSubhash Jadavani err = sd_set_current_limit(card, status);
6555371c927SArindam Nath if (err)
6565371c927SArindam Nath goto out;
6575371c927SArindam Nath
65893c712f9SSubhash Jadavani /* Set bus speed mode of the card */
65993c712f9SSubhash Jadavani err = sd_set_bus_speed_mode(card, status);
660b513ea25SArindam Nath if (err)
661b513ea25SArindam Nath goto out;
662b513ea25SArindam Nath
663810e08eeSFredrik Soderstedt /*
664810e08eeSFredrik Soderstedt * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
665810e08eeSFredrik Soderstedt * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
666810e08eeSFredrik Soderstedt */
66763e415c6SAdrian Hunter if (!mmc_host_is_spi(card->host) &&
668e10c3219SCarlo Caione (card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
669e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
670e10c3219SCarlo Caione card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
67163e415c6SAdrian Hunter err = mmc_execute_tuning(card);
6724324f6deSWeijun Yang
6734324f6deSWeijun Yang /*
6744324f6deSWeijun Yang * As SD Specifications Part1 Physical Layer Specification
6754324f6deSWeijun Yang * Version 3.01 says, CMD19 tuning is available for unlocked
6764324f6deSWeijun Yang * cards in transfer state of 1.8V signaling mode. The small
6774324f6deSWeijun Yang * difference between v3.00 and 3.01 spec means that CMD19
6784324f6deSWeijun Yang * tuning is also available for DDR50 mode.
6794324f6deSWeijun Yang */
680e10c3219SCarlo Caione if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
6814324f6deSWeijun Yang pr_warn("%s: ddr50 tuning failed\n",
6824324f6deSWeijun Yang mmc_hostname(card->host));
6834324f6deSWeijun Yang err = 0;
6844324f6deSWeijun Yang }
6854324f6deSWeijun Yang }
6864324f6deSWeijun Yang
687d6d50a15SArindam Nath out:
688d6d50a15SArindam Nath kfree(status);
689d6d50a15SArindam Nath
690d6d50a15SArindam Nath return err;
691d6d50a15SArindam Nath }
692d6d50a15SArindam Nath
69351ec92e2SPierre Ossman MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
69451ec92e2SPierre Ossman card->raw_cid[2], card->raw_cid[3]);
69551ec92e2SPierre Ossman MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
69651ec92e2SPierre Ossman card->raw_csd[2], card->raw_csd[3]);
69751ec92e2SPierre Ossman MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
6985275a652SUri Yanai MMC_DEV_ATTR(ssr,
6995275a652SUri Yanai "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n",
7005275a652SUri Yanai card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2],
7015275a652SUri Yanai card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5],
7025275a652SUri Yanai card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8],
7035275a652SUri Yanai card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11],
7045275a652SUri Yanai card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14],
7055275a652SUri Yanai card->raw_ssr[15]);
70651ec92e2SPierre Ossman MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
707dfe86cbaSAdrian Hunter MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
708dfe86cbaSAdrian Hunter MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
70951ec92e2SPierre Ossman MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
71051ec92e2SPierre Ossman MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
71151ec92e2SPierre Ossman MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
71251ec92e2SPierre Ossman MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
71351ec92e2SPierre Ossman MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
71451ec92e2SPierre Ossman MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
715c892b0d8SBastian Stender MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
716974e85e9SHarish Jenny K N MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
71751ec92e2SPierre Ossman
71851ec92e2SPierre Ossman
mmc_dsr_show(struct device * dev,struct device_attribute * attr,char * buf)719f5d8a5feSSergey Shtylyov static ssize_t mmc_dsr_show(struct device *dev, struct device_attribute *attr,
7206825a606SBojan Prtvar char *buf)
7216825a606SBojan Prtvar {
7226825a606SBojan Prtvar struct mmc_card *card = mmc_dev_to_card(dev);
7236825a606SBojan Prtvar struct mmc_host *host = card->host;
7246825a606SBojan Prtvar
7256825a606SBojan Prtvar if (card->csd.dsr_imp && host->dsr_req)
726f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "0x%x\n", host->dsr);
7276825a606SBojan Prtvar /* return default DSR value */
728f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "0x%x\n", 0x404);
7296825a606SBojan Prtvar }
7306825a606SBojan Prtvar
7316825a606SBojan Prtvar static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
7326825a606SBojan Prtvar
733254e1754SPali Rohár MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
734254e1754SPali Rohár MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
735b698f6abSPali Rohár MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
736b698f6abSPali Rohár
737b698f6abSPali Rohár #define sdio_info_attr(num) \
738b698f6abSPali Rohár static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \
739b698f6abSPali Rohár { \
740b698f6abSPali Rohár struct mmc_card *card = mmc_dev_to_card(dev); \
741b698f6abSPali Rohár \
742b698f6abSPali Rohár if (num > card->num_info) \
743b698f6abSPali Rohár return -ENODATA; \
744b698f6abSPali Rohár if (!card->info[num - 1][0]) \
745b698f6abSPali Rohár return 0; \
746f5d8a5feSSergey Shtylyov return sysfs_emit(buf, "%s\n", card->info[num - 1]); \
747b698f6abSPali Rohár } \
748b698f6abSPali Rohár static DEVICE_ATTR_RO(info##num)
749b698f6abSPali Rohár
750b698f6abSPali Rohár sdio_info_attr(1);
751b698f6abSPali Rohár sdio_info_attr(2);
752b698f6abSPali Rohár sdio_info_attr(3);
753b698f6abSPali Rohár sdio_info_attr(4);
754254e1754SPali Rohár
75551ec92e2SPierre Ossman static struct attribute *sd_std_attrs[] = {
756254e1754SPali Rohár &dev_attr_vendor.attr,
757254e1754SPali Rohár &dev_attr_device.attr,
758b698f6abSPali Rohár &dev_attr_revision.attr,
759b698f6abSPali Rohár &dev_attr_info1.attr,
760b698f6abSPali Rohár &dev_attr_info2.attr,
761b698f6abSPali Rohár &dev_attr_info3.attr,
762b698f6abSPali Rohár &dev_attr_info4.attr,
76351ec92e2SPierre Ossman &dev_attr_cid.attr,
76451ec92e2SPierre Ossman &dev_attr_csd.attr,
76551ec92e2SPierre Ossman &dev_attr_scr.attr,
7665275a652SUri Yanai &dev_attr_ssr.attr,
76751ec92e2SPierre Ossman &dev_attr_date.attr,
768dfe86cbaSAdrian Hunter &dev_attr_erase_size.attr,
769dfe86cbaSAdrian Hunter &dev_attr_preferred_erase_size.attr,
77051ec92e2SPierre Ossman &dev_attr_fwrev.attr,
77151ec92e2SPierre Ossman &dev_attr_hwrev.attr,
77251ec92e2SPierre Ossman &dev_attr_manfid.attr,
77351ec92e2SPierre Ossman &dev_attr_name.attr,
77451ec92e2SPierre Ossman &dev_attr_oemid.attr,
77551ec92e2SPierre Ossman &dev_attr_serial.attr,
7765fb06af7SBojan Prtvar &dev_attr_ocr.attr,
777974e85e9SHarish Jenny K N &dev_attr_rca.attr,
7786825a606SBojan Prtvar &dev_attr_dsr.attr,
77951ec92e2SPierre Ossman NULL,
78051ec92e2SPierre Ossman };
781254e1754SPali Rohár
sd_std_is_visible(struct kobject * kobj,struct attribute * attr,int index)782254e1754SPali Rohár static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr,
783254e1754SPali Rohár int index)
784254e1754SPali Rohár {
785e449d983STian Tao struct device *dev = kobj_to_dev(kobj);
786254e1754SPali Rohár struct mmc_card *card = mmc_dev_to_card(dev);
787254e1754SPali Rohár
788b698f6abSPali Rohár /* CIS vendor and device ids, revision and info string are available only for Combo cards */
789b698f6abSPali Rohár if ((attr == &dev_attr_vendor.attr ||
790b698f6abSPali Rohár attr == &dev_attr_device.attr ||
791b698f6abSPali Rohár attr == &dev_attr_revision.attr ||
792b698f6abSPali Rohár attr == &dev_attr_info1.attr ||
793b698f6abSPali Rohár attr == &dev_attr_info2.attr ||
794b698f6abSPali Rohár attr == &dev_attr_info3.attr ||
795b698f6abSPali Rohár attr == &dev_attr_info4.attr
7963beb0ab5SSeunghui Lee ) &&!mmc_card_sd_combo(card))
797254e1754SPali Rohár return 0;
798254e1754SPali Rohár
799254e1754SPali Rohár return attr->mode;
800254e1754SPali Rohár }
801254e1754SPali Rohár
802254e1754SPali Rohár static const struct attribute_group sd_std_group = {
803254e1754SPali Rohár .attrs = sd_std_attrs,
804254e1754SPali Rohár .is_visible = sd_std_is_visible,
805254e1754SPali Rohár };
806254e1754SPali Rohár __ATTRIBUTE_GROUPS(sd_std);
80751ec92e2SPierre Ossman
80871578a1eSMichal Miroslaw struct device_type sd_type = {
809d1e58212SAxel Lin .groups = sd_std_groups,
81051ec92e2SPierre Ossman };
81151ec92e2SPierre Ossman
8127ea239d9SPierre Ossman /*
81371578a1eSMichal Miroslaw * Fetch CID from card.
8146abaa0c9SPierre Ossman */
mmc_sd_get_cid(struct mmc_host * host,u32 ocr,u32 * cid,u32 * rocr)815d6d50a15SArindam Nath int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
8166abaa0c9SPierre Ossman {
8176abaa0c9SPierre Ossman int err;
81855c4665eSAaron Lu u32 max_current;
8190797e5f1SJohan Rudholm int retries = 10;
82069041150SUlf Hansson u32 pocr = ocr;
8210797e5f1SJohan Rudholm
8220797e5f1SJohan Rudholm try_again:
8230797e5f1SJohan Rudholm if (!retries) {
8240797e5f1SJohan Rudholm ocr &= ~SD_OCR_S18R;
8256606110dSJoe Perches pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
8260797e5f1SJohan Rudholm }
8276abaa0c9SPierre Ossman
8286abaa0c9SPierre Ossman /*
8296abaa0c9SPierre Ossman * Since we're changing the OCR value, we seem to
8306abaa0c9SPierre Ossman * need to tell some cards to go back to the idle
8316abaa0c9SPierre Ossman * state. We wait 1ms to give cards time to
8326abaa0c9SPierre Ossman * respond.
8336abaa0c9SPierre Ossman */
8346abaa0c9SPierre Ossman mmc_go_idle(host);
8356abaa0c9SPierre Ossman
8366abaa0c9SPierre Ossman /*
8376abaa0c9SPierre Ossman * If SD_SEND_IF_COND indicates an SD 2.0
8386abaa0c9SPierre Ossman * compliant card and we should set bit 30
8396abaa0c9SPierre Ossman * of the ocr to indicate that we can handle
8406abaa0c9SPierre Ossman * block-addressed SDHC cards.
8416abaa0c9SPierre Ossman */
8426abaa0c9SPierre Ossman err = mmc_send_if_cond(host, ocr);
84317b0429dSPierre Ossman if (!err)
844f2119df6SArindam Nath ocr |= SD_OCR_CCS;
8456abaa0c9SPierre Ossman
846f2119df6SArindam Nath /*
847f2119df6SArindam Nath * If the host supports one of UHS-I modes, request the card
8480797e5f1SJohan Rudholm * to switch to 1.8V signaling level. If the card has failed
8490797e5f1SJohan Rudholm * repeatedly to switch however, skip this.
850f2119df6SArindam Nath */
8510797e5f1SJohan Rudholm if (retries && mmc_host_uhs(host))
852f2119df6SArindam Nath ocr |= SD_OCR_S18R;
853f2119df6SArindam Nath
85455c4665eSAaron Lu /*
85555c4665eSAaron Lu * If the host can supply more than 150mA at current voltage,
85655c4665eSAaron Lu * XPC should be set to 1.
85755c4665eSAaron Lu */
85855c4665eSAaron Lu max_current = sd_get_host_max_current(host);
85955c4665eSAaron Lu if (max_current > 150)
860f2119df6SArindam Nath ocr |= SD_OCR_XPC;
861f2119df6SArindam Nath
862d6d50a15SArindam Nath err = mmc_send_app_op_cond(host, ocr, rocr);
86317b0429dSPierre Ossman if (err)
86471578a1eSMichal Miroslaw return err;
8656abaa0c9SPierre Ossman
866f2119df6SArindam Nath /*
86709247e11SChristian Löhle * In case the S18A bit is set in the response, let's start the signal
86809247e11SChristian Löhle * voltage switch procedure. SPI mode doesn't support CMD11.
86909247e11SChristian Löhle * Note that, according to the spec, the S18A bit is not valid unless
87009247e11SChristian Löhle * the CCS bit is set as well. We deliberately deviate from the spec in
87109247e11SChristian Löhle * regards to this, which allows UHS-I to be supported for SDSC cards.
872f2119df6SArindam Nath */
873e9233917SBrian Norris if (!mmc_host_is_spi(host) && (ocr & SD_OCR_S18R) &&
874e9233917SBrian Norris rocr && (*rocr & SD_ROCR_S18A)) {
8752ed573b6SUlf Hansson err = mmc_set_uhs_voltage(host, pocr);
8760797e5f1SJohan Rudholm if (err == -EAGAIN) {
8770797e5f1SJohan Rudholm retries--;
8780797e5f1SJohan Rudholm goto try_again;
8790797e5f1SJohan Rudholm } else if (err) {
8800797e5f1SJohan Rudholm retries = 0;
881f2119df6SArindam Nath goto try_again;
882f2119df6SArindam Nath }
883f2119df6SArindam Nath }
884f2119df6SArindam Nath
885af517150SDavid Brownell err = mmc_send_cid(host, cid);
88671578a1eSMichal Miroslaw return err;
887adf66a0dSPierre Ossman }
8886abaa0c9SPierre Ossman
mmc_sd_get_csd(struct mmc_card * card)889bd7342feSYue Hu int mmc_sd_get_csd(struct mmc_card *card)
89071578a1eSMichal Miroslaw {
89171578a1eSMichal Miroslaw int err;
8926abaa0c9SPierre Ossman
8936abaa0c9SPierre Ossman /*
8946abaa0c9SPierre Ossman * Fetch CSD from card.
8956abaa0c9SPierre Ossman */
8966abaa0c9SPierre Ossman err = mmc_send_csd(card, card->raw_csd);
89717b0429dSPierre Ossman if (err)
89871578a1eSMichal Miroslaw return err;
8996abaa0c9SPierre Ossman
900bd766312SPierre Ossman err = mmc_decode_csd(card);
901adf66a0dSPierre Ossman if (err)
90271578a1eSMichal Miroslaw return err;
903bd766312SPierre Ossman
90471578a1eSMichal Miroslaw return 0;
9056abaa0c9SPierre Ossman }
9066abaa0c9SPierre Ossman
mmc_sd_get_ro(struct mmc_host * host)9079f6e0bffSLars-Peter Clausen static int mmc_sd_get_ro(struct mmc_host *host)
9089f6e0bffSLars-Peter Clausen {
9099f6e0bffSLars-Peter Clausen int ro;
9109f6e0bffSLars-Peter Clausen
9119f6e0bffSLars-Peter Clausen /*
9129f6e0bffSLars-Peter Clausen * Some systems don't feature a write-protect pin and don't need one.
9139f6e0bffSLars-Peter Clausen * E.g. because they only have micro-SD card slot. For those systems
9149f6e0bffSLars-Peter Clausen * assume that the SD card is always read-write.
9159f6e0bffSLars-Peter Clausen */
9169f6e0bffSLars-Peter Clausen if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
9179f6e0bffSLars-Peter Clausen return 0;
9189f6e0bffSLars-Peter Clausen
9199f6e0bffSLars-Peter Clausen if (!host->ops->get_ro)
9209f6e0bffSLars-Peter Clausen return -1;
9219f6e0bffSLars-Peter Clausen
9229f6e0bffSLars-Peter Clausen ro = host->ops->get_ro(host);
9239f6e0bffSLars-Peter Clausen
9249f6e0bffSLars-Peter Clausen return ro;
9259f6e0bffSLars-Peter Clausen }
9269f6e0bffSLars-Peter Clausen
mmc_sd_setup_card(struct mmc_host * host,struct mmc_card * card,bool reinit)92771578a1eSMichal Miroslaw int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
92871578a1eSMichal Miroslaw bool reinit)
92971578a1eSMichal Miroslaw {
93071578a1eSMichal Miroslaw int err;
9316abaa0c9SPierre Ossman
93271578a1eSMichal Miroslaw if (!reinit) {
9336abaa0c9SPierre Ossman /*
9346abaa0c9SPierre Ossman * Fetch SCR from card.
9356abaa0c9SPierre Ossman */
93606c9ccb7SWinkler, Tomas err = mmc_app_send_scr(card);
93717b0429dSPierre Ossman if (err)
93871578a1eSMichal Miroslaw return err;
9396abaa0c9SPierre Ossman
940bd766312SPierre Ossman err = mmc_decode_scr(card);
94171578a1eSMichal Miroslaw if (err)
94271578a1eSMichal Miroslaw return err;
9436abaa0c9SPierre Ossman
9446abaa0c9SPierre Ossman /*
945dfe86cbaSAdrian Hunter * Fetch and process SD Status register.
946dfe86cbaSAdrian Hunter */
947dfe86cbaSAdrian Hunter err = mmc_read_ssr(card);
948dfe86cbaSAdrian Hunter if (err)
949dfe86cbaSAdrian Hunter return err;
950dfe86cbaSAdrian Hunter
951dfe86cbaSAdrian Hunter /* Erase init depends on CSD and SSR */
952dfe86cbaSAdrian Hunter mmc_init_erase(card);
95363f15609SAdrian Hunter }
954dfe86cbaSAdrian Hunter
955dfe86cbaSAdrian Hunter /*
95663f15609SAdrian Hunter * Fetch switch information from card. Note, sd3_bus_mode can change if
95763f15609SAdrian Hunter * voltage switch outcome changes, so do this always.
9586abaa0c9SPierre Ossman */
9596abaa0c9SPierre Ossman err = mmc_read_switch(card);
96017b0429dSPierre Ossman if (err)
96171578a1eSMichal Miroslaw return err;
9626abaa0c9SPierre Ossman
9636abaa0c9SPierre Ossman /*
9649d9f25c0SWolfgang Muees * For SPI, enable CRC as appropriate.
9659d9f25c0SWolfgang Muees * This CRC enable is located AFTER the reading of the
9669d9f25c0SWolfgang Muees * card registers because some SDHC cards are not able
9679d9f25c0SWolfgang Muees * to provide valid CRCs for non-512-byte blocks.
9689d9f25c0SWolfgang Muees */
9699d9f25c0SWolfgang Muees if (mmc_host_is_spi(host)) {
9709d9f25c0SWolfgang Muees err = mmc_spi_set_crc(host, use_spi_crc);
9719d9f25c0SWolfgang Muees if (err)
97271578a1eSMichal Miroslaw return err;
9739d9f25c0SWolfgang Muees }
9749d9f25c0SWolfgang Muees
9759d9f25c0SWolfgang Muees /*
97671578a1eSMichal Miroslaw * Check if read-only switch is active.
9776abaa0c9SPierre Ossman */
97871578a1eSMichal Miroslaw if (!reinit) {
9799f6e0bffSLars-Peter Clausen int ro = mmc_sd_get_ro(host);
98071578a1eSMichal Miroslaw
98171578a1eSMichal Miroslaw if (ro < 0) {
9826606110dSJoe Perches pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
98371578a1eSMichal Miroslaw mmc_hostname(host));
98471578a1eSMichal Miroslaw } else if (ro > 0) {
98571578a1eSMichal Miroslaw mmc_card_set_readonly(card);
98671578a1eSMichal Miroslaw }
98771578a1eSMichal Miroslaw }
98871578a1eSMichal Miroslaw
98971578a1eSMichal Miroslaw return 0;
99071578a1eSMichal Miroslaw }
99171578a1eSMichal Miroslaw
mmc_sd_get_max_clock(struct mmc_card * card)99271578a1eSMichal Miroslaw unsigned mmc_sd_get_max_clock(struct mmc_card *card)
99371578a1eSMichal Miroslaw {
99471578a1eSMichal Miroslaw unsigned max_dtr = (unsigned int)-1;
9956abaa0c9SPierre Ossman
996cdc99179SSeungwon Jeon if (mmc_card_hs(card)) {
9976abaa0c9SPierre Ossman if (max_dtr > card->sw_caps.hs_max_dtr)
9986abaa0c9SPierre Ossman max_dtr = card->sw_caps.hs_max_dtr;
9996abaa0c9SPierre Ossman } else if (max_dtr > card->csd.max_dtr) {
10006abaa0c9SPierre Ossman max_dtr = card->csd.max_dtr;
10016abaa0c9SPierre Ossman }
10026abaa0c9SPierre Ossman
100371578a1eSMichal Miroslaw return max_dtr;
100471578a1eSMichal Miroslaw }
100571578a1eSMichal Miroslaw
mmc_sd_card_using_v18(struct mmc_card * card)10066a11fc47SAdrian Hunter static bool mmc_sd_card_using_v18(struct mmc_card *card)
10076a11fc47SAdrian Hunter {
10086a11fc47SAdrian Hunter /*
10096a11fc47SAdrian Hunter * According to the SD spec., the Bus Speed Mode (function group 1) bits
10106a11fc47SAdrian Hunter * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
10116a11fc47SAdrian Hunter * they can be used to determine if the card has already switched to
10126a11fc47SAdrian Hunter * 1.8V signaling.
10136a11fc47SAdrian Hunter */
10146a11fc47SAdrian Hunter return card->sw_caps.sd3_bus_mode &
10156a11fc47SAdrian Hunter (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
10166a11fc47SAdrian Hunter }
10176a11fc47SAdrian Hunter
sd_write_ext_reg(struct mmc_card * card,u8 fno,u8 page,u16 offset,u8 reg_data)10182c5d4276SUlf Hansson static int sd_write_ext_reg(struct mmc_card *card, u8 fno, u8 page, u16 offset,
10192c5d4276SUlf Hansson u8 reg_data)
10202c5d4276SUlf Hansson {
10212c5d4276SUlf Hansson struct mmc_host *host = card->host;
10222c5d4276SUlf Hansson struct mmc_request mrq = {};
10232c5d4276SUlf Hansson struct mmc_command cmd = {};
10242c5d4276SUlf Hansson struct mmc_data data = {};
10252c5d4276SUlf Hansson struct scatterlist sg;
10262c5d4276SUlf Hansson u8 *reg_buf;
10272c5d4276SUlf Hansson
10282c5d4276SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
10292c5d4276SUlf Hansson if (!reg_buf)
10302c5d4276SUlf Hansson return -ENOMEM;
10312c5d4276SUlf Hansson
10322c5d4276SUlf Hansson mrq.cmd = &cmd;
10332c5d4276SUlf Hansson mrq.data = &data;
10342c5d4276SUlf Hansson
10352c5d4276SUlf Hansson /*
10362c5d4276SUlf Hansson * Arguments of CMD49:
10372c5d4276SUlf Hansson * [31:31] MIO (0 = memory).
10382c5d4276SUlf Hansson * [30:27] FNO (function number).
10392c5d4276SUlf Hansson * [26:26] MW - mask write mode (0 = disable).
10402c5d4276SUlf Hansson * [25:18] page number.
10412c5d4276SUlf Hansson * [17:9] offset address.
10422c5d4276SUlf Hansson * [8:0] length (0 = 1 byte).
10432c5d4276SUlf Hansson */
10442c5d4276SUlf Hansson cmd.arg = fno << 27 | page << 18 | offset << 9;
10452c5d4276SUlf Hansson
10462c5d4276SUlf Hansson /* The first byte in the buffer is the data to be written. */
10472c5d4276SUlf Hansson reg_buf[0] = reg_data;
10482c5d4276SUlf Hansson
10492c5d4276SUlf Hansson data.flags = MMC_DATA_WRITE;
10502c5d4276SUlf Hansson data.blksz = 512;
10512c5d4276SUlf Hansson data.blocks = 1;
10522c5d4276SUlf Hansson data.sg = &sg;
10532c5d4276SUlf Hansson data.sg_len = 1;
10542c5d4276SUlf Hansson sg_init_one(&sg, reg_buf, 512);
10552c5d4276SUlf Hansson
10562c5d4276SUlf Hansson cmd.opcode = SD_WRITE_EXTR_SINGLE;
10572c5d4276SUlf Hansson cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
10582c5d4276SUlf Hansson
10592c5d4276SUlf Hansson mmc_set_data_timeout(&data, card);
10602c5d4276SUlf Hansson mmc_wait_for_req(host, &mrq);
10612c5d4276SUlf Hansson
10622c5d4276SUlf Hansson kfree(reg_buf);
10632c5d4276SUlf Hansson
10642c5d4276SUlf Hansson /*
10652c5d4276SUlf Hansson * Note that, the SD card is allowed to signal busy on DAT0 up to 1s
10662c5d4276SUlf Hansson * after the CMD49. Although, let's leave this to be managed by the
10672c5d4276SUlf Hansson * caller.
10682c5d4276SUlf Hansson */
10692c5d4276SUlf Hansson
10702c5d4276SUlf Hansson if (cmd.error)
10712c5d4276SUlf Hansson return cmd.error;
10722c5d4276SUlf Hansson if (data.error)
10732c5d4276SUlf Hansson return data.error;
10742c5d4276SUlf Hansson
10752c5d4276SUlf Hansson return 0;
10762c5d4276SUlf Hansson }
10772c5d4276SUlf Hansson
sd_read_ext_reg(struct mmc_card * card,u8 fno,u8 page,u16 offset,u16 len,u8 * reg_buf)1078c784f927SUlf Hansson static int sd_read_ext_reg(struct mmc_card *card, u8 fno, u8 page,
1079c784f927SUlf Hansson u16 offset, u16 len, u8 *reg_buf)
1080c784f927SUlf Hansson {
1081c784f927SUlf Hansson u32 cmd_args;
1082c784f927SUlf Hansson
1083c784f927SUlf Hansson /*
1084c784f927SUlf Hansson * Command arguments of CMD48:
1085c784f927SUlf Hansson * [31:31] MIO (0 = memory).
1086c784f927SUlf Hansson * [30:27] FNO (function number).
1087c784f927SUlf Hansson * [26:26] reserved (0).
1088c784f927SUlf Hansson * [25:18] page number.
1089c784f927SUlf Hansson * [17:9] offset address.
1090c784f927SUlf Hansson * [8:0] length (0 = 1 byte, 1ff = 512 bytes).
1091c784f927SUlf Hansson */
1092c784f927SUlf Hansson cmd_args = fno << 27 | page << 18 | offset << 9 | (len -1);
1093c784f927SUlf Hansson
1094c784f927SUlf Hansson return mmc_send_adtc_data(card, card->host, SD_READ_EXTR_SINGLE,
1095c784f927SUlf Hansson cmd_args, reg_buf, 512);
1096c784f927SUlf Hansson }
1097c784f927SUlf Hansson
sd_parse_ext_reg_power(struct mmc_card * card,u8 fno,u8 page,u16 offset)1098c784f927SUlf Hansson static int sd_parse_ext_reg_power(struct mmc_card *card, u8 fno, u8 page,
1099c784f927SUlf Hansson u16 offset)
1100c784f927SUlf Hansson {
1101c784f927SUlf Hansson int err;
1102c784f927SUlf Hansson u8 *reg_buf;
1103c784f927SUlf Hansson
1104c784f927SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
1105c784f927SUlf Hansson if (!reg_buf)
1106c784f927SUlf Hansson return -ENOMEM;
1107c784f927SUlf Hansson
1108c784f927SUlf Hansson /* Read the extension register for power management function. */
1109c784f927SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
1110c784f927SUlf Hansson if (err) {
1111c784f927SUlf Hansson pr_warn("%s: error %d reading PM func of ext reg\n",
1112c784f927SUlf Hansson mmc_hostname(card->host), err);
1113c784f927SUlf Hansson goto out;
1114c784f927SUlf Hansson }
1115c784f927SUlf Hansson
1116c784f927SUlf Hansson /* PM revision consists of 4 bits. */
1117c784f927SUlf Hansson card->ext_power.rev = reg_buf[0] & 0xf;
1118c784f927SUlf Hansson
1119c784f927SUlf Hansson /* Power Off Notification support at bit 4. */
1120c784f927SUlf Hansson if (reg_buf[1] & BIT(4))
1121c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_OFF_NOTIFY;
1122c784f927SUlf Hansson
1123c784f927SUlf Hansson /* Power Sustenance support at bit 5. */
1124c784f927SUlf Hansson if (reg_buf[1] & BIT(5))
1125c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_SUSTENANCE;
1126c784f927SUlf Hansson
1127c784f927SUlf Hansson /* Power Down Mode support at bit 6. */
1128c784f927SUlf Hansson if (reg_buf[1] & BIT(6))
1129c784f927SUlf Hansson card->ext_power.feature_support |= SD_EXT_POWER_DOWN_MODE;
1130c784f927SUlf Hansson
1131c784f927SUlf Hansson card->ext_power.fno = fno;
1132c784f927SUlf Hansson card->ext_power.page = page;
1133c784f927SUlf Hansson card->ext_power.offset = offset;
1134c784f927SUlf Hansson
1135c784f927SUlf Hansson out:
1136c784f927SUlf Hansson kfree(reg_buf);
1137c784f927SUlf Hansson return err;
1138c784f927SUlf Hansson }
1139c784f927SUlf Hansson
sd_parse_ext_reg_perf(struct mmc_card * card,u8 fno,u8 page,u16 offset)11404e6306e0SUlf Hansson static int sd_parse_ext_reg_perf(struct mmc_card *card, u8 fno, u8 page,
11414e6306e0SUlf Hansson u16 offset)
11424e6306e0SUlf Hansson {
11434e6306e0SUlf Hansson int err;
11444e6306e0SUlf Hansson u8 *reg_buf;
11454e6306e0SUlf Hansson
11464e6306e0SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
11474e6306e0SUlf Hansson if (!reg_buf)
11484e6306e0SUlf Hansson return -ENOMEM;
11494e6306e0SUlf Hansson
11504e6306e0SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 512, reg_buf);
11514e6306e0SUlf Hansson if (err) {
11524e6306e0SUlf Hansson pr_warn("%s: error %d reading PERF func of ext reg\n",
11534e6306e0SUlf Hansson mmc_hostname(card->host), err);
11544e6306e0SUlf Hansson goto out;
11554e6306e0SUlf Hansson }
11564e6306e0SUlf Hansson
11574e6306e0SUlf Hansson /* PERF revision. */
11584e6306e0SUlf Hansson card->ext_perf.rev = reg_buf[0];
11594e6306e0SUlf Hansson
11604e6306e0SUlf Hansson /* FX_EVENT support at bit 0. */
11614e6306e0SUlf Hansson if (reg_buf[1] & BIT(0))
11624e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_FX_EVENT;
11634e6306e0SUlf Hansson
11644e6306e0SUlf Hansson /* Card initiated self-maintenance support at bit 0. */
11654e6306e0SUlf Hansson if (reg_buf[2] & BIT(0))
11664e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CARD_MAINT;
11674e6306e0SUlf Hansson
11684e6306e0SUlf Hansson /* Host initiated self-maintenance support at bit 1. */
11694e6306e0SUlf Hansson if (reg_buf[2] & BIT(1))
11704e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_HOST_MAINT;
11714e6306e0SUlf Hansson
11724e6306e0SUlf Hansson /* Cache support at bit 0. */
1173c467c8f0SMarek Vasut if ((reg_buf[4] & BIT(0)) && !mmc_card_broken_sd_cache(card))
11744e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CACHE;
11754e6306e0SUlf Hansson
11764e6306e0SUlf Hansson /* Command queue support indicated via queue depth bits (0 to 4). */
11774e6306e0SUlf Hansson if (reg_buf[6] & 0x1f)
11784e6306e0SUlf Hansson card->ext_perf.feature_support |= SD_EXT_PERF_CMD_QUEUE;
11794e6306e0SUlf Hansson
11804e6306e0SUlf Hansson card->ext_perf.fno = fno;
11814e6306e0SUlf Hansson card->ext_perf.page = page;
11824e6306e0SUlf Hansson card->ext_perf.offset = offset;
11834e6306e0SUlf Hansson
11844e6306e0SUlf Hansson out:
11854e6306e0SUlf Hansson kfree(reg_buf);
11864e6306e0SUlf Hansson return err;
11874e6306e0SUlf Hansson }
11884e6306e0SUlf Hansson
sd_parse_ext_reg(struct mmc_card * card,u8 * gen_info_buf,u16 * next_ext_addr)1189c784f927SUlf Hansson static int sd_parse_ext_reg(struct mmc_card *card, u8 *gen_info_buf,
1190c784f927SUlf Hansson u16 *next_ext_addr)
1191c784f927SUlf Hansson {
1192c784f927SUlf Hansson u8 num_regs, fno, page;
1193c784f927SUlf Hansson u16 sfc, offset, ext = *next_ext_addr;
1194c784f927SUlf Hansson u32 reg_addr;
1195c784f927SUlf Hansson
1196c784f927SUlf Hansson /*
1197c784f927SUlf Hansson * Parse only one register set per extension, as that is sufficient to
1198c784f927SUlf Hansson * support the standard functions. This means another 48 bytes in the
1199c784f927SUlf Hansson * buffer must be available.
1200c784f927SUlf Hansson */
1201c784f927SUlf Hansson if (ext + 48 > 512)
1202c784f927SUlf Hansson return -EFAULT;
1203c784f927SUlf Hansson
1204c784f927SUlf Hansson /* Standard Function Code */
1205c784f927SUlf Hansson memcpy(&sfc, &gen_info_buf[ext], 2);
1206c784f927SUlf Hansson
1207c784f927SUlf Hansson /* Address to the next extension. */
1208c784f927SUlf Hansson memcpy(next_ext_addr, &gen_info_buf[ext + 40], 2);
1209c784f927SUlf Hansson
1210c784f927SUlf Hansson /* Number of registers for this extension. */
1211c784f927SUlf Hansson num_regs = gen_info_buf[ext + 42];
1212c784f927SUlf Hansson
1213c784f927SUlf Hansson /* We support only one register per extension. */
1214c784f927SUlf Hansson if (num_regs != 1)
1215c784f927SUlf Hansson return 0;
1216c784f927SUlf Hansson
1217c784f927SUlf Hansson /* Extension register address. */
1218c784f927SUlf Hansson memcpy(®_addr, &gen_info_buf[ext + 44], 4);
1219c784f927SUlf Hansson
1220c784f927SUlf Hansson /* 9 bits (0 to 8) contains the offset address. */
1221c784f927SUlf Hansson offset = reg_addr & 0x1ff;
1222c784f927SUlf Hansson
1223c784f927SUlf Hansson /* 8 bits (9 to 16) contains the page number. */
1224c784f927SUlf Hansson page = reg_addr >> 9 & 0xff ;
1225c784f927SUlf Hansson
1226c784f927SUlf Hansson /* 4 bits (18 to 21) contains the function number. */
1227c784f927SUlf Hansson fno = reg_addr >> 18 & 0xf;
1228c784f927SUlf Hansson
1229c784f927SUlf Hansson /* Standard Function Code for power management. */
1230c784f927SUlf Hansson if (sfc == 0x1)
1231c784f927SUlf Hansson return sd_parse_ext_reg_power(card, fno, page, offset);
1232c784f927SUlf Hansson
12334e6306e0SUlf Hansson /* Standard Function Code for performance enhancement. */
12344e6306e0SUlf Hansson if (sfc == 0x2)
12354e6306e0SUlf Hansson return sd_parse_ext_reg_perf(card, fno, page, offset);
12364e6306e0SUlf Hansson
1237c784f927SUlf Hansson return 0;
1238c784f927SUlf Hansson }
1239c784f927SUlf Hansson
sd_read_ext_regs(struct mmc_card * card)1240c784f927SUlf Hansson static int sd_read_ext_regs(struct mmc_card *card)
1241c784f927SUlf Hansson {
1242c784f927SUlf Hansson int err, i;
1243c784f927SUlf Hansson u8 num_ext, *gen_info_buf;
1244c784f927SUlf Hansson u16 rev, len, next_ext_addr;
1245c784f927SUlf Hansson
1246c784f927SUlf Hansson if (mmc_host_is_spi(card->host))
1247c784f927SUlf Hansson return 0;
1248c784f927SUlf Hansson
1249c784f927SUlf Hansson if (!(card->scr.cmds & SD_SCR_CMD48_SUPPORT))
1250c784f927SUlf Hansson return 0;
1251c784f927SUlf Hansson
1252c784f927SUlf Hansson gen_info_buf = kzalloc(512, GFP_KERNEL);
1253c784f927SUlf Hansson if (!gen_info_buf)
1254c784f927SUlf Hansson return -ENOMEM;
1255c784f927SUlf Hansson
1256c784f927SUlf Hansson /*
1257c784f927SUlf Hansson * Read 512 bytes of general info, which is found at function number 0,
1258c784f927SUlf Hansson * at page 0 and with no offset.
1259c784f927SUlf Hansson */
1260c784f927SUlf Hansson err = sd_read_ext_reg(card, 0, 0, 0, 512, gen_info_buf);
1261c784f927SUlf Hansson if (err) {
1262fc02e2b5SZhen Lei pr_err("%s: error %d reading general info of SD ext reg\n",
1263c784f927SUlf Hansson mmc_hostname(card->host), err);
1264c784f927SUlf Hansson goto out;
1265c784f927SUlf Hansson }
1266c784f927SUlf Hansson
1267c784f927SUlf Hansson /* General info structure revision. */
1268c784f927SUlf Hansson memcpy(&rev, &gen_info_buf[0], 2);
1269c784f927SUlf Hansson
1270c784f927SUlf Hansson /* Length of general info in bytes. */
1271c784f927SUlf Hansson memcpy(&len, &gen_info_buf[2], 2);
1272c784f927SUlf Hansson
1273c784f927SUlf Hansson /* Number of extensions to be find. */
1274c784f927SUlf Hansson num_ext = gen_info_buf[4];
1275c784f927SUlf Hansson
1276fc02e2b5SZhen Lei /*
1277fc02e2b5SZhen Lei * We only support revision 0 and limit it to 512 bytes for simplicity.
1278fc02e2b5SZhen Lei * No matter what, let's return zero to allow us to continue using the
1279fc02e2b5SZhen Lei * card, even if we can't support the features from the SD function
1280fc02e2b5SZhen Lei * extensions registers.
1281fc02e2b5SZhen Lei */
1282c784f927SUlf Hansson if (rev != 0 || len > 512) {
1283c784f927SUlf Hansson pr_warn("%s: non-supported SD ext reg layout\n",
1284c784f927SUlf Hansson mmc_hostname(card->host));
1285c784f927SUlf Hansson goto out;
1286c784f927SUlf Hansson }
1287c784f927SUlf Hansson
1288c784f927SUlf Hansson /*
1289c784f927SUlf Hansson * Parse the extension registers. The first extension should start
1290c784f927SUlf Hansson * immediately after the general info header (16 bytes).
1291c784f927SUlf Hansson */
1292c784f927SUlf Hansson next_ext_addr = 16;
1293c784f927SUlf Hansson for (i = 0; i < num_ext; i++) {
1294c784f927SUlf Hansson err = sd_parse_ext_reg(card, gen_info_buf, &next_ext_addr);
1295c784f927SUlf Hansson if (err) {
1296fc02e2b5SZhen Lei pr_err("%s: error %d parsing SD ext reg\n",
1297c784f927SUlf Hansson mmc_hostname(card->host), err);
1298c784f927SUlf Hansson goto out;
1299c784f927SUlf Hansson }
1300c784f927SUlf Hansson }
1301c784f927SUlf Hansson
1302c784f927SUlf Hansson out:
1303c784f927SUlf Hansson kfree(gen_info_buf);
1304c784f927SUlf Hansson return err;
1305c784f927SUlf Hansson }
1306c784f927SUlf Hansson
sd_cache_enabled(struct mmc_host * host)1307130206a6SUlf Hansson static bool sd_cache_enabled(struct mmc_host *host)
1308130206a6SUlf Hansson {
1309130206a6SUlf Hansson return host->card->ext_perf.feature_enabled & SD_EXT_PERF_CACHE;
1310130206a6SUlf Hansson }
1311130206a6SUlf Hansson
sd_flush_cache(struct mmc_host * host)1312130206a6SUlf Hansson static int sd_flush_cache(struct mmc_host *host)
1313130206a6SUlf Hansson {
1314130206a6SUlf Hansson struct mmc_card *card = host->card;
1315130206a6SUlf Hansson u8 *reg_buf, fno, page;
1316130206a6SUlf Hansson u16 offset;
1317130206a6SUlf Hansson int err;
1318130206a6SUlf Hansson
1319130206a6SUlf Hansson if (!sd_cache_enabled(host))
1320130206a6SUlf Hansson return 0;
1321130206a6SUlf Hansson
1322130206a6SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
1323130206a6SUlf Hansson if (!reg_buf)
1324130206a6SUlf Hansson return -ENOMEM;
1325130206a6SUlf Hansson
1326130206a6SUlf Hansson /*
1327130206a6SUlf Hansson * Set Flush Cache at bit 0 in the performance enhancement register at
1328130206a6SUlf Hansson * 261 bytes offset.
1329130206a6SUlf Hansson */
1330130206a6SUlf Hansson fno = card->ext_perf.fno;
1331130206a6SUlf Hansson page = card->ext_perf.page;
1332130206a6SUlf Hansson offset = card->ext_perf.offset + 261;
1333130206a6SUlf Hansson
1334130206a6SUlf Hansson err = sd_write_ext_reg(card, fno, page, offset, BIT(0));
1335130206a6SUlf Hansson if (err) {
1336130206a6SUlf Hansson pr_warn("%s: error %d writing Cache Flush bit\n",
1337130206a6SUlf Hansson mmc_hostname(host), err);
1338130206a6SUlf Hansson goto out;
1339130206a6SUlf Hansson }
1340130206a6SUlf Hansson
1341130206a6SUlf Hansson err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1342130206a6SUlf Hansson MMC_BUSY_EXTR_SINGLE);
1343130206a6SUlf Hansson if (err)
1344130206a6SUlf Hansson goto out;
1345130206a6SUlf Hansson
1346130206a6SUlf Hansson /*
1347130206a6SUlf Hansson * Read the Flush Cache bit. The card shall reset it, to confirm that
1348130206a6SUlf Hansson * it's has completed the flushing of the cache.
1349130206a6SUlf Hansson */
1350130206a6SUlf Hansson err = sd_read_ext_reg(card, fno, page, offset, 1, reg_buf);
1351130206a6SUlf Hansson if (err) {
1352130206a6SUlf Hansson pr_warn("%s: error %d reading Cache Flush bit\n",
1353130206a6SUlf Hansson mmc_hostname(host), err);
1354130206a6SUlf Hansson goto out;
1355130206a6SUlf Hansson }
1356130206a6SUlf Hansson
1357130206a6SUlf Hansson if (reg_buf[0] & BIT(0))
1358130206a6SUlf Hansson err = -ETIMEDOUT;
1359130206a6SUlf Hansson out:
1360130206a6SUlf Hansson kfree(reg_buf);
1361130206a6SUlf Hansson return err;
1362130206a6SUlf Hansson }
1363130206a6SUlf Hansson
sd_enable_cache(struct mmc_card * card)1364130206a6SUlf Hansson static int sd_enable_cache(struct mmc_card *card)
1365130206a6SUlf Hansson {
1366130206a6SUlf Hansson u8 *reg_buf;
1367130206a6SUlf Hansson int err;
1368130206a6SUlf Hansson
1369130206a6SUlf Hansson card->ext_perf.feature_enabled &= ~SD_EXT_PERF_CACHE;
1370130206a6SUlf Hansson
1371130206a6SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
1372130206a6SUlf Hansson if (!reg_buf)
1373130206a6SUlf Hansson return -ENOMEM;
1374130206a6SUlf Hansson
1375130206a6SUlf Hansson /*
1376130206a6SUlf Hansson * Set Cache Enable at bit 0 in the performance enhancement register at
1377130206a6SUlf Hansson * 260 bytes offset.
1378130206a6SUlf Hansson */
1379130206a6SUlf Hansson err = sd_write_ext_reg(card, card->ext_perf.fno, card->ext_perf.page,
1380130206a6SUlf Hansson card->ext_perf.offset + 260, BIT(0));
1381130206a6SUlf Hansson if (err) {
1382130206a6SUlf Hansson pr_warn("%s: error %d writing Cache Enable bit\n",
1383130206a6SUlf Hansson mmc_hostname(card->host), err);
1384130206a6SUlf Hansson goto out;
1385130206a6SUlf Hansson }
1386130206a6SUlf Hansson
1387130206a6SUlf Hansson err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1388130206a6SUlf Hansson MMC_BUSY_EXTR_SINGLE);
1389130206a6SUlf Hansson if (!err)
1390130206a6SUlf Hansson card->ext_perf.feature_enabled |= SD_EXT_PERF_CACHE;
1391130206a6SUlf Hansson
1392130206a6SUlf Hansson out:
1393130206a6SUlf Hansson kfree(reg_buf);
1394130206a6SUlf Hansson return err;
1395130206a6SUlf Hansson }
1396130206a6SUlf Hansson
139771578a1eSMichal Miroslaw /*
139871578a1eSMichal Miroslaw * Handle the detection and initialisation of a card.
139971578a1eSMichal Miroslaw *
140071578a1eSMichal Miroslaw * In the case of a resume, "oldcard" will contain the card
140171578a1eSMichal Miroslaw * we're trying to reinitialise.
140271578a1eSMichal Miroslaw */
mmc_sd_init_card(struct mmc_host * host,u32 ocr,struct mmc_card * oldcard)140371578a1eSMichal Miroslaw static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
140471578a1eSMichal Miroslaw struct mmc_card *oldcard)
140571578a1eSMichal Miroslaw {
140671578a1eSMichal Miroslaw struct mmc_card *card;
140771578a1eSMichal Miroslaw int err;
140871578a1eSMichal Miroslaw u32 cid[4];
1409d6d50a15SArindam Nath u32 rocr = 0;
14106a11fc47SAdrian Hunter bool v18_fixup_failed = false;
141171578a1eSMichal Miroslaw
141271578a1eSMichal Miroslaw WARN_ON(!host->claimed);
14136a11fc47SAdrian Hunter retry:
1414d6d50a15SArindam Nath err = mmc_sd_get_cid(host, ocr, cid, &rocr);
141571578a1eSMichal Miroslaw if (err)
141671578a1eSMichal Miroslaw return err;
141771578a1eSMichal Miroslaw
141871578a1eSMichal Miroslaw if (oldcard) {
1419099b6481Shongjiefang if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
1420099b6481Shongjiefang pr_debug("%s: Perhaps the card was replaced\n",
1421099b6481Shongjiefang mmc_hostname(host));
142271578a1eSMichal Miroslaw return -ENOENT;
1423099b6481Shongjiefang }
142471578a1eSMichal Miroslaw
142571578a1eSMichal Miroslaw card = oldcard;
142671578a1eSMichal Miroslaw } else {
142771578a1eSMichal Miroslaw /*
142871578a1eSMichal Miroslaw * Allocate card structure.
142971578a1eSMichal Miroslaw */
143071578a1eSMichal Miroslaw card = mmc_alloc_card(host, &sd_type);
143171578a1eSMichal Miroslaw if (IS_ERR(card))
143271578a1eSMichal Miroslaw return PTR_ERR(card);
143371578a1eSMichal Miroslaw
143469041150SUlf Hansson card->ocr = ocr;
143571578a1eSMichal Miroslaw card->type = MMC_TYPE_SD;
143671578a1eSMichal Miroslaw memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
143771578a1eSMichal Miroslaw }
143871578a1eSMichal Miroslaw
143971578a1eSMichal Miroslaw /*
1440eac86321SDoug Anderson * Call the optional HC's init_card function to handle quirks.
1441eac86321SDoug Anderson */
1442eac86321SDoug Anderson if (host->ops->init_card)
1443eac86321SDoug Anderson host->ops->init_card(host, card);
1444eac86321SDoug Anderson
1445eac86321SDoug Anderson /*
144671578a1eSMichal Miroslaw * For native busses: get card RCA and quit open drain mode.
144771578a1eSMichal Miroslaw */
144871578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) {
144971578a1eSMichal Miroslaw err = mmc_send_relative_addr(host, &card->rca);
145071578a1eSMichal Miroslaw if (err)
14517fca9675SWei WANG goto free_card;
145271578a1eSMichal Miroslaw }
145371578a1eSMichal Miroslaw
145471578a1eSMichal Miroslaw if (!oldcard) {
1455bd7342feSYue Hu err = mmc_sd_get_csd(card);
145671578a1eSMichal Miroslaw if (err)
14577fca9675SWei WANG goto free_card;
145871578a1eSMichal Miroslaw
145971578a1eSMichal Miroslaw mmc_decode_cid(card);
146071578a1eSMichal Miroslaw }
146171578a1eSMichal Miroslaw
146271578a1eSMichal Miroslaw /*
14633d705d14SSascha Hauer * handling only for cards supporting DSR and hosts requesting
14643d705d14SSascha Hauer * DSR configuration
14653d705d14SSascha Hauer */
14663d705d14SSascha Hauer if (card->csd.dsr_imp && host->dsr_req)
14673d705d14SSascha Hauer mmc_set_dsr(host);
14683d705d14SSascha Hauer
14693d705d14SSascha Hauer /*
147071578a1eSMichal Miroslaw * Select card, as all following commands rely on that.
147171578a1eSMichal Miroslaw */
147271578a1eSMichal Miroslaw if (!mmc_host_is_spi(host)) {
147371578a1eSMichal Miroslaw err = mmc_select_card(card);
147471578a1eSMichal Miroslaw if (err)
14757fca9675SWei WANG goto free_card;
147671578a1eSMichal Miroslaw }
147771578a1eSMichal Miroslaw
147871578a1eSMichal Miroslaw err = mmc_sd_setup_card(host, card, oldcard != NULL);
147971578a1eSMichal Miroslaw if (err)
148071578a1eSMichal Miroslaw goto free_card;
148171578a1eSMichal Miroslaw
14826a11fc47SAdrian Hunter /*
14836a11fc47SAdrian Hunter * If the card has not been power cycled, it may still be using 1.8V
14846a11fc47SAdrian Hunter * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
14856a11fc47SAdrian Hunter * transfer mode.
14866a11fc47SAdrian Hunter */
14876a11fc47SAdrian Hunter if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
14886a11fc47SAdrian Hunter mmc_sd_card_using_v18(card) &&
14896a11fc47SAdrian Hunter host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
14906a11fc47SAdrian Hunter if (mmc_host_set_uhs_voltage(host) ||
14916a11fc47SAdrian Hunter mmc_sd_init_uhs_card(card)) {
14926a11fc47SAdrian Hunter v18_fixup_failed = true;
14936a11fc47SAdrian Hunter mmc_power_cycle(host, ocr);
14946a11fc47SAdrian Hunter if (!oldcard)
14956a11fc47SAdrian Hunter mmc_remove_card(card);
14966a11fc47SAdrian Hunter goto retry;
14976a11fc47SAdrian Hunter }
149815c56208SAdrian Hunter goto cont;
14996a11fc47SAdrian Hunter }
15006a11fc47SAdrian Hunter
1501d6d50a15SArindam Nath /* Initialization sequence for UHS-I cards */
1502d6743a8aSShawn Lin if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
1503d6d50a15SArindam Nath err = mmc_sd_init_uhs_card(card);
1504d6d50a15SArindam Nath if (err)
1505d6d50a15SArindam Nath goto free_card;
1506d6d50a15SArindam Nath } else {
150771578a1eSMichal Miroslaw /*
150871578a1eSMichal Miroslaw * Attempt to change to high-speed (if supported)
150971578a1eSMichal Miroslaw */
151071578a1eSMichal Miroslaw err = mmc_sd_switch_hs(card);
151171578a1eSMichal Miroslaw if (err > 0)
1512cdc99179SSeungwon Jeon mmc_set_timing(card->host, MMC_TIMING_SD_HS);
151371578a1eSMichal Miroslaw else if (err)
151471578a1eSMichal Miroslaw goto free_card;
151571578a1eSMichal Miroslaw
151671578a1eSMichal Miroslaw /*
151771578a1eSMichal Miroslaw * Set bus speed.
151871578a1eSMichal Miroslaw */
151971578a1eSMichal Miroslaw mmc_set_clock(host, mmc_sd_get_max_clock(card));
15206abaa0c9SPierre Ossman
1521*bac80683SWenchao Chen if (host->ios.timing == MMC_TIMING_SD_HS &&
1522*bac80683SWenchao Chen host->ops->prepare_sd_hs_tuning) {
1523*bac80683SWenchao Chen err = host->ops->prepare_sd_hs_tuning(host, card);
1524*bac80683SWenchao Chen if (err)
1525*bac80683SWenchao Chen goto free_card;
1526*bac80683SWenchao Chen }
1527*bac80683SWenchao Chen
15286abaa0c9SPierre Ossman /*
15296abaa0c9SPierre Ossman * Switch to wider bus (if supported).
15306abaa0c9SPierre Ossman */
153171651297SPierre Ossman if ((host->caps & MMC_CAP_4_BIT_DATA) &&
15326abaa0c9SPierre Ossman (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
15336abaa0c9SPierre Ossman err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
153417b0429dSPierre Ossman if (err)
15356abaa0c9SPierre Ossman goto free_card;
15366abaa0c9SPierre Ossman
15376abaa0c9SPierre Ossman mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
15386abaa0c9SPierre Ossman }
1539*bac80683SWenchao Chen
1540*bac80683SWenchao Chen if (host->ios.timing == MMC_TIMING_SD_HS &&
1541*bac80683SWenchao Chen host->ops->execute_sd_hs_tuning) {
1542*bac80683SWenchao Chen err = host->ops->execute_sd_hs_tuning(host, card);
1543*bac80683SWenchao Chen if (err)
1544*bac80683SWenchao Chen goto free_card;
1545*bac80683SWenchao Chen }
1546d6d50a15SArindam Nath }
154715c56208SAdrian Hunter cont:
1548c784f927SUlf Hansson if (!oldcard) {
1549c784f927SUlf Hansson /* Read/parse the extension registers. */
1550c784f927SUlf Hansson err = sd_read_ext_regs(card);
1551c784f927SUlf Hansson if (err)
1552c784f927SUlf Hansson goto free_card;
1553c784f927SUlf Hansson }
1554c784f927SUlf Hansson
1555130206a6SUlf Hansson /* Enable internal SD cache if supported. */
1556130206a6SUlf Hansson if (card->ext_perf.feature_support & SD_EXT_PERF_CACHE) {
1557130206a6SUlf Hansson err = sd_enable_cache(card);
1558130206a6SUlf Hansson if (err)
1559130206a6SUlf Hansson goto free_card;
1560130206a6SUlf Hansson }
1561130206a6SUlf Hansson
1562045d705dSBaolin Wang if (host->cqe_ops && !host->cqe_enabled) {
1563045d705dSBaolin Wang err = host->cqe_ops->cqe_enable(host, card);
1564045d705dSBaolin Wang if (!err) {
1565045d705dSBaolin Wang host->cqe_enabled = true;
1566045d705dSBaolin Wang host->hsq_enabled = true;
1567045d705dSBaolin Wang pr_info("%s: Host Software Queue enabled\n",
1568045d705dSBaolin Wang mmc_hostname(host));
1569045d705dSBaolin Wang }
1570045d705dSBaolin Wang }
1571045d705dSBaolin Wang
1572247cfe53SKyle Roeschley if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
1573247cfe53SKyle Roeschley host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
1574247cfe53SKyle Roeschley pr_err("%s: Host failed to negotiate down from 3.3V\n",
1575247cfe53SKyle Roeschley mmc_hostname(host));
1576247cfe53SKyle Roeschley err = -EINVAL;
1577247cfe53SKyle Roeschley goto free_card;
1578247cfe53SKyle Roeschley }
157915c56208SAdrian Hunter
15806abaa0c9SPierre Ossman host->card = card;
158117b0429dSPierre Ossman return 0;
15826abaa0c9SPierre Ossman
15836abaa0c9SPierre Ossman free_card:
15846abaa0c9SPierre Ossman if (!oldcard)
15856abaa0c9SPierre Ossman mmc_remove_card(card);
15866abaa0c9SPierre Ossman
1587adf66a0dSPierre Ossman return err;
15886abaa0c9SPierre Ossman }
15896abaa0c9SPierre Ossman
15906abaa0c9SPierre Ossman /*
15917ea239d9SPierre Ossman * Host is being removed. Free up the current card.
15927ea239d9SPierre Ossman */
mmc_sd_remove(struct mmc_host * host)15937ea239d9SPierre Ossman static void mmc_sd_remove(struct mmc_host *host)
15947ea239d9SPierre Ossman {
15957ea239d9SPierre Ossman mmc_remove_card(host->card);
15967ea239d9SPierre Ossman host->card = NULL;
15977ea239d9SPierre Ossman }
15987ea239d9SPierre Ossman
15997ea239d9SPierre Ossman /*
1600d3049504SAdrian Hunter * Card detection - card is alive.
1601d3049504SAdrian Hunter */
mmc_sd_alive(struct mmc_host * host)1602d3049504SAdrian Hunter static int mmc_sd_alive(struct mmc_host *host)
1603d3049504SAdrian Hunter {
1604d3049504SAdrian Hunter return mmc_send_status(host->card, NULL);
1605d3049504SAdrian Hunter }
1606d3049504SAdrian Hunter
1607d3049504SAdrian Hunter /*
16087ea239d9SPierre Ossman * Card detection callback from host.
16097ea239d9SPierre Ossman */
mmc_sd_detect(struct mmc_host * host)16107ea239d9SPierre Ossman static void mmc_sd_detect(struct mmc_host *host)
16117ea239d9SPierre Ossman {
16127ea239d9SPierre Ossman int err;
16137ea239d9SPierre Ossman
16146c0cedd1SAdrian Hunter mmc_get_card(host->card, NULL);
16157ea239d9SPierre Ossman
16167ea239d9SPierre Ossman /*
16177ea239d9SPierre Ossman * Just check if our card has been removed.
16187ea239d9SPierre Ossman */
1619d3049504SAdrian Hunter err = _mmc_detect_card_removed(host);
16207ea239d9SPierre Ossman
16216c0cedd1SAdrian Hunter mmc_put_card(host->card, NULL);
16227ea239d9SPierre Ossman
162317b0429dSPierre Ossman if (err) {
16244101c16aSPierre Ossman mmc_sd_remove(host);
16257ea239d9SPierre Ossman
16267ea239d9SPierre Ossman mmc_claim_host(host);
16277ea239d9SPierre Ossman mmc_detach_bus(host);
16287f7e4129SUlf Hansson mmc_power_off(host);
16297ea239d9SPierre Ossman mmc_release_host(host);
16307ea239d9SPierre Ossman }
16317ea239d9SPierre Ossman }
16327ea239d9SPierre Ossman
sd_can_poweroff_notify(struct mmc_card * card)16332c5d4276SUlf Hansson static int sd_can_poweroff_notify(struct mmc_card *card)
16342c5d4276SUlf Hansson {
16352c5d4276SUlf Hansson return card->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY;
16362c5d4276SUlf Hansson }
16372c5d4276SUlf Hansson
sd_busy_poweroff_notify_cb(void * cb_data,bool * busy)16382c5d4276SUlf Hansson static int sd_busy_poweroff_notify_cb(void *cb_data, bool *busy)
16392c5d4276SUlf Hansson {
16402c5d4276SUlf Hansson struct sd_busy_data *data = cb_data;
16412c5d4276SUlf Hansson struct mmc_card *card = data->card;
16422c5d4276SUlf Hansson int err;
16432c5d4276SUlf Hansson
16442c5d4276SUlf Hansson /*
16452c5d4276SUlf Hansson * Read the status register for the power management function. It's at
16462c5d4276SUlf Hansson * one byte offset and is one byte long. The Power Off Notification
16472c5d4276SUlf Hansson * Ready is bit 0.
16482c5d4276SUlf Hansson */
16492c5d4276SUlf Hansson err = sd_read_ext_reg(card, card->ext_power.fno, card->ext_power.page,
16502c5d4276SUlf Hansson card->ext_power.offset + 1, 1, data->reg_buf);
16512c5d4276SUlf Hansson if (err) {
16522c5d4276SUlf Hansson pr_warn("%s: error %d reading status reg of PM func\n",
16532c5d4276SUlf Hansson mmc_hostname(card->host), err);
16542c5d4276SUlf Hansson return err;
16552c5d4276SUlf Hansson }
16562c5d4276SUlf Hansson
16572c5d4276SUlf Hansson *busy = !(data->reg_buf[0] & BIT(0));
16582c5d4276SUlf Hansson return 0;
16592c5d4276SUlf Hansson }
16602c5d4276SUlf Hansson
sd_poweroff_notify(struct mmc_card * card)16612c5d4276SUlf Hansson static int sd_poweroff_notify(struct mmc_card *card)
16622c5d4276SUlf Hansson {
16632c5d4276SUlf Hansson struct sd_busy_data cb_data;
16642c5d4276SUlf Hansson u8 *reg_buf;
16652c5d4276SUlf Hansson int err;
16662c5d4276SUlf Hansson
16672c5d4276SUlf Hansson reg_buf = kzalloc(512, GFP_KERNEL);
16682c5d4276SUlf Hansson if (!reg_buf)
16692c5d4276SUlf Hansson return -ENOMEM;
16702c5d4276SUlf Hansson
16712c5d4276SUlf Hansson /*
16722c5d4276SUlf Hansson * Set the Power Off Notification bit in the power management settings
16732c5d4276SUlf Hansson * register at 2 bytes offset.
16742c5d4276SUlf Hansson */
16752c5d4276SUlf Hansson err = sd_write_ext_reg(card, card->ext_power.fno, card->ext_power.page,
16762c5d4276SUlf Hansson card->ext_power.offset + 2, BIT(0));
16772c5d4276SUlf Hansson if (err) {
16782c5d4276SUlf Hansson pr_warn("%s: error %d writing Power Off Notify bit\n",
16792c5d4276SUlf Hansson mmc_hostname(card->host), err);
16802c5d4276SUlf Hansson goto out;
16812c5d4276SUlf Hansson }
16822c5d4276SUlf Hansson
1683379f56c2SAndrey Skvortsov /* Find out when the command is completed. */
1684379f56c2SAndrey Skvortsov err = mmc_poll_for_busy(card, SD_WRITE_EXTR_SINGLE_TIMEOUT_MS, false,
1685379f56c2SAndrey Skvortsov MMC_BUSY_EXTR_SINGLE);
1686379f56c2SAndrey Skvortsov if (err)
1687379f56c2SAndrey Skvortsov goto out;
1688379f56c2SAndrey Skvortsov
16892c5d4276SUlf Hansson cb_data.card = card;
16902c5d4276SUlf Hansson cb_data.reg_buf = reg_buf;
16911760fdb6SUlf Hansson err = __mmc_poll_for_busy(card->host, 0, SD_POWEROFF_NOTIFY_TIMEOUT_MS,
16922c5d4276SUlf Hansson &sd_busy_poweroff_notify_cb, &cb_data);
16932c5d4276SUlf Hansson
16942c5d4276SUlf Hansson out:
16952c5d4276SUlf Hansson kfree(reg_buf);
16962c5d4276SUlf Hansson return err;
16972c5d4276SUlf Hansson }
16982c5d4276SUlf Hansson
_mmc_sd_suspend(struct mmc_host * host)16990cb403a2SUlf Hansson static int _mmc_sd_suspend(struct mmc_host *host)
17006abaa0c9SPierre Ossman {
17012c5d4276SUlf Hansson struct mmc_card *card = host->card;
170285e727edSJaehoon Chung int err = 0;
170385e727edSJaehoon Chung
17046abaa0c9SPierre Ossman mmc_claim_host(host);
17059ec775f7SUlf Hansson
17062c5d4276SUlf Hansson if (mmc_card_suspended(card))
17079ec775f7SUlf Hansson goto out;
17089ec775f7SUlf Hansson
17092c5d4276SUlf Hansson if (sd_can_poweroff_notify(card))
17102c5d4276SUlf Hansson err = sd_poweroff_notify(card);
17112c5d4276SUlf Hansson else if (!mmc_host_is_spi(host))
171285e727edSJaehoon Chung err = mmc_deselect_cards(host);
1713cdc99179SSeungwon Jeon
17149ec775f7SUlf Hansson if (!err) {
171574590263SUlf Hansson mmc_power_off(host);
17162c5d4276SUlf Hansson mmc_card_set_suspended(card);
17179ec775f7SUlf Hansson }
171895cdfb72SNicolas Pitre
17199ec775f7SUlf Hansson out:
17209ec775f7SUlf Hansson mmc_release_host(host);
172185e727edSJaehoon Chung return err;
17226abaa0c9SPierre Ossman }
17236abaa0c9SPierre Ossman
17246abaa0c9SPierre Ossman /*
17250cb403a2SUlf Hansson * Callback for suspend
17260cb403a2SUlf Hansson */
mmc_sd_suspend(struct mmc_host * host)17270cb403a2SUlf Hansson static int mmc_sd_suspend(struct mmc_host *host)
17280cb403a2SUlf Hansson {
17290cb403a2SUlf Hansson int err;
17300cb403a2SUlf Hansson
17310cb403a2SUlf Hansson err = _mmc_sd_suspend(host);
17320cb403a2SUlf Hansson if (!err) {
17330cb403a2SUlf Hansson pm_runtime_disable(&host->card->dev);
17340cb403a2SUlf Hansson pm_runtime_set_suspended(&host->card->dev);
17350cb403a2SUlf Hansson }
17360cb403a2SUlf Hansson
17370cb403a2SUlf Hansson return err;
17380cb403a2SUlf Hansson }
17390cb403a2SUlf Hansson
17400cb403a2SUlf Hansson /*
17416abaa0c9SPierre Ossman * This function tries to determine if the same card is still present
17426abaa0c9SPierre Ossman * and, if so, restore all state to it.
17436abaa0c9SPierre Ossman */
_mmc_sd_resume(struct mmc_host * host)17440cb403a2SUlf Hansson static int _mmc_sd_resume(struct mmc_host *host)
17456abaa0c9SPierre Ossman {
17469ec775f7SUlf Hansson int err = 0;
17476abaa0c9SPierre Ossman
17486abaa0c9SPierre Ossman mmc_claim_host(host);
17499ec775f7SUlf Hansson
17509ec775f7SUlf Hansson if (!mmc_card_suspended(host->card))
17519ec775f7SUlf Hansson goto out;
17529ec775f7SUlf Hansson
175369041150SUlf Hansson mmc_power_up(host, host->card->ocr);
175469041150SUlf Hansson err = mmc_sd_init_card(host, host->card->ocr, host->card);
17559ec775f7SUlf Hansson mmc_card_clr_suspended(host->card);
17562986d0bfSPierre Ossman
17579ec775f7SUlf Hansson out:
17589ec775f7SUlf Hansson mmc_release_host(host);
175995cdfb72SNicolas Pitre return err;
17606abaa0c9SPierre Ossman }
17616abaa0c9SPierre Ossman
1762c4d770d7SUlf Hansson /*
17630cb403a2SUlf Hansson * Callback for resume
17640cb403a2SUlf Hansson */
mmc_sd_resume(struct mmc_host * host)17650cb403a2SUlf Hansson static int mmc_sd_resume(struct mmc_host *host)
17660cb403a2SUlf Hansson {
17670cb403a2SUlf Hansson pm_runtime_enable(&host->card->dev);
1768c29536e8SUlf Hansson return 0;
17690cb403a2SUlf Hansson }
17700cb403a2SUlf Hansson
17710cb403a2SUlf Hansson /*
1772c4d770d7SUlf Hansson * Callback for runtime_suspend.
1773c4d770d7SUlf Hansson */
mmc_sd_runtime_suspend(struct mmc_host * host)1774c4d770d7SUlf Hansson static int mmc_sd_runtime_suspend(struct mmc_host *host)
1775c4d770d7SUlf Hansson {
1776c4d770d7SUlf Hansson int err;
1777c4d770d7SUlf Hansson
1778c4d770d7SUlf Hansson if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
1779c4d770d7SUlf Hansson return 0;
1780c4d770d7SUlf Hansson
17810cb403a2SUlf Hansson err = _mmc_sd_suspend(host);
17820cc81a8cSUlf Hansson if (err)
1783f42cf8d6SMasanari Iida pr_err("%s: error %d doing aggressive suspend\n",
1784c4d770d7SUlf Hansson mmc_hostname(host), err);
1785c4d770d7SUlf Hansson
1786c4d770d7SUlf Hansson return err;
1787c4d770d7SUlf Hansson }
1788c4d770d7SUlf Hansson
1789c4d770d7SUlf Hansson /*
1790c4d770d7SUlf Hansson * Callback for runtime_resume.
1791c4d770d7SUlf Hansson */
mmc_sd_runtime_resume(struct mmc_host * host)1792c4d770d7SUlf Hansson static int mmc_sd_runtime_resume(struct mmc_host *host)
1793c4d770d7SUlf Hansson {
1794c4d770d7SUlf Hansson int err;
1795c4d770d7SUlf Hansson
17960cb403a2SUlf Hansson err = _mmc_sd_resume(host);
1797520322d9SAdrian Hunter if (err && err != -ENOMEDIUM)
1798c29536e8SUlf Hansson pr_err("%s: error %d doing runtime resume\n",
1799c4d770d7SUlf Hansson mmc_hostname(host), err);
1800c4d770d7SUlf Hansson
1801c4d770d7SUlf Hansson return 0;
1802c4d770d7SUlf Hansson }
1803c4d770d7SUlf Hansson
mmc_sd_hw_reset(struct mmc_host * host)18043a3db603SUlf Hansson static int mmc_sd_hw_reset(struct mmc_host *host)
1805dc0ecfefSJohan Rudholm {
1806dc0ecfefSJohan Rudholm mmc_power_cycle(host, host->card->ocr);
18073056c49cSUlf Hansson return mmc_sd_init_card(host, host->card->ocr, host->card);
1808dc0ecfefSJohan Rudholm }
1809dc0ecfefSJohan Rudholm
18109feae246SAdrian Hunter static const struct mmc_bus_ops mmc_sd_ops = {
18119feae246SAdrian Hunter .remove = mmc_sd_remove,
18129feae246SAdrian Hunter .detect = mmc_sd_detect,
1813c4d770d7SUlf Hansson .runtime_suspend = mmc_sd_runtime_suspend,
1814c4d770d7SUlf Hansson .runtime_resume = mmc_sd_runtime_resume,
18159feae246SAdrian Hunter .suspend = mmc_sd_suspend,
18169feae246SAdrian Hunter .resume = mmc_sd_resume,
1817d3049504SAdrian Hunter .alive = mmc_sd_alive,
18185992e786SUlf Hansson .shutdown = mmc_sd_suspend,
18193a3db603SUlf Hansson .hw_reset = mmc_sd_hw_reset,
1820130206a6SUlf Hansson .cache_enabled = sd_cache_enabled,
1821130206a6SUlf Hansson .flush_cache = sd_flush_cache,
18229feae246SAdrian Hunter };
18239feae246SAdrian Hunter
18247ea239d9SPierre Ossman /*
18257ea239d9SPierre Ossman * Starting point for SD card init.
18267ea239d9SPierre Ossman */
mmc_attach_sd(struct mmc_host * host)1827807e8e40SAndy Ross int mmc_attach_sd(struct mmc_host *host)
18287ea239d9SPierre Ossman {
18297ea239d9SPierre Ossman int err;
183069041150SUlf Hansson u32 ocr, rocr;
18317ea239d9SPierre Ossman
1832d84075c8SPierre Ossman WARN_ON(!host->claimed);
18337ea239d9SPierre Ossman
1834807e8e40SAndy Ross err = mmc_send_app_op_cond(host, 0, &ocr);
1835807e8e40SAndy Ross if (err)
1836807e8e40SAndy Ross return err;
1837807e8e40SAndy Ross
18382501c917SUlf Hansson mmc_attach_bus(host, &mmc_sd_ops);
18398f230f45STakashi Iwai if (host->ocr_avail_sd)
18408f230f45STakashi Iwai host->ocr_avail = host->ocr_avail_sd;
18417ea239d9SPierre Ossman
184255556da0SPhilip Langdale /*
1843af517150SDavid Brownell * We need to get OCR a different way for SPI.
1844af517150SDavid Brownell */
1845af517150SDavid Brownell if (mmc_host_is_spi(host)) {
1846af517150SDavid Brownell mmc_go_idle(host);
1847af517150SDavid Brownell
1848af517150SDavid Brownell err = mmc_spi_read_ocr(host, 0, &ocr);
1849af517150SDavid Brownell if (err)
1850af517150SDavid Brownell goto err;
1851af517150SDavid Brownell }
1852af517150SDavid Brownell
185372741084SUlf Hansson /*
185472741084SUlf Hansson * Some SD cards claims an out of spec VDD voltage range. Let's treat
185572741084SUlf Hansson * these bits as being in-valid and especially also bit7.
185672741084SUlf Hansson */
185772741084SUlf Hansson ocr &= ~0x7FFF;
185872741084SUlf Hansson
185969041150SUlf Hansson rocr = mmc_select_voltage(host, ocr);
18607ea239d9SPierre Ossman
18617ea239d9SPierre Ossman /*
18627ea239d9SPierre Ossman * Can we support the voltage(s) of the card(s)?
18637ea239d9SPierre Ossman */
186469041150SUlf Hansson if (!rocr) {
1865109b5bedSPierre Ossman err = -EINVAL;
18667ea239d9SPierre Ossman goto err;
1867109b5bedSPierre Ossman }
18687ea239d9SPierre Ossman
18697ea239d9SPierre Ossman /*
18706abaa0c9SPierre Ossman * Detect and init the card.
18717ea239d9SPierre Ossman */
187269041150SUlf Hansson err = mmc_sd_init_card(host, rocr, NULL);
187317b0429dSPierre Ossman if (err)
18747ea239d9SPierre Ossman goto err;
18757ea239d9SPierre Ossman
18767ea239d9SPierre Ossman mmc_release_host(host);
18774101c16aSPierre Ossman err = mmc_add_card(host->card);
18787ea239d9SPierre Ossman if (err)
18792986d0bfSPierre Ossman goto remove_card;
18807ea239d9SPierre Ossman
18812860d060SSergei Shtylyov mmc_claim_host(host);
18827ea239d9SPierre Ossman return 0;
18837ea239d9SPierre Ossman
18842986d0bfSPierre Ossman remove_card:
18856abaa0c9SPierre Ossman mmc_remove_card(host->card);
18867ea239d9SPierre Ossman host->card = NULL;
18872986d0bfSPierre Ossman mmc_claim_host(host);
18887ea239d9SPierre Ossman err:
18897ea239d9SPierre Ossman mmc_detach_bus(host);
18907ea239d9SPierre Ossman
1891a3c76eb9SGirish K S pr_err("%s: error %d whilst initialising SD card\n",
1892109b5bedSPierre Ossman mmc_hostname(host), err);
1893109b5bedSPierre Ossman
1894adf66a0dSPierre Ossman return err;
18957ea239d9SPierre Ossman }
1896