Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1 | /* |
Pierre Ossman | 70f1048 | 2007-07-11 20:04:50 +0200 | [diff] [blame] | 2 | * linux/drivers/mmc/core/sd.c |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. |
| 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
| 6 | * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/err.h> |
Wolfram Sang | 9288cac | 2013-11-26 02:16:25 +0100 | [diff] [blame] | 14 | #include <linux/sizes.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Paul Gortmaker | 0205a90 | 2011-07-15 12:01:27 -0400 | [diff] [blame] | 16 | #include <linux/stat.h> |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 17 | #include <linux/pm_runtime.h> |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 18 | |
| 19 | #include <linux/mmc/host.h> |
| 20 | #include <linux/mmc/card.h> |
| 21 | #include <linux/mmc/mmc.h> |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 22 | #include <linux/mmc/sd.h> |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 23 | |
| 24 | #include "core.h" |
Pierre Ossman | 4101c16 | 2007-05-19 13:39:01 +0200 | [diff] [blame] | 25 | #include "bus.h" |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 26 | #include "mmc_ops.h" |
Mark Brown | ce10149 | 2011-02-10 10:58:37 +0000 | [diff] [blame] | 27 | #include "sd.h" |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 28 | #include "sd_ops.h" |
| 29 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 30 | static const unsigned int tran_exp[] = { |
| 31 | 10000, 100000, 1000000, 10000000, |
| 32 | 0, 0, 0, 0 |
| 33 | }; |
| 34 | |
| 35 | static const unsigned char tran_mant[] = { |
| 36 | 0, 10, 12, 13, 15, 20, 25, 30, |
| 37 | 35, 40, 45, 50, 55, 60, 70, 80, |
| 38 | }; |
| 39 | |
| 40 | static const unsigned int tacc_exp[] = { |
| 41 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, |
| 42 | }; |
| 43 | |
| 44 | static const unsigned int tacc_mant[] = { |
| 45 | 0, 10, 12, 13, 15, 20, 25, 30, |
| 46 | 35, 40, 45, 50, 55, 60, 70, 80, |
| 47 | }; |
| 48 | |
Wolfram Sang | 9288cac | 2013-11-26 02:16:25 +0100 | [diff] [blame] | 49 | static const unsigned int sd_au_size[] = { |
| 50 | 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, |
| 51 | SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, |
| 52 | SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, |
| 53 | SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, |
| 54 | }; |
| 55 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 56 | #define UNSTUFF_BITS(resp,start,size) \ |
| 57 | ({ \ |
| 58 | const int __size = size; \ |
| 59 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ |
| 60 | const int __off = 3 - ((start) / 32); \ |
| 61 | const int __shft = (start) & 31; \ |
| 62 | u32 __res; \ |
| 63 | \ |
| 64 | __res = resp[__off] >> __shft; \ |
| 65 | if (__size + __shft > 32) \ |
| 66 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ |
| 67 | __res & __mask; \ |
| 68 | }) |
| 69 | |
| 70 | /* |
| 71 | * Given the decoded CSD structure, decode the raw CID to our CID structure. |
| 72 | */ |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 73 | void mmc_decode_cid(struct mmc_card *card) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 74 | { |
| 75 | u32 *resp = card->raw_cid; |
| 76 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 77 | /* |
| 78 | * SD doesn't currently have a version field so we will |
| 79 | * have to assume we can parse this. |
| 80 | */ |
| 81 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); |
| 82 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); |
| 83 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); |
| 84 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); |
| 85 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); |
| 86 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); |
| 87 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); |
| 88 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); |
| 89 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); |
| 90 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); |
| 91 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); |
| 92 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); |
| 93 | |
| 94 | card->cid.year += 2000; /* SD cards year offset */ |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Given a 128-bit response, decode to our card CSD structure. |
| 99 | */ |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 100 | static int mmc_decode_csd(struct mmc_card *card) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 101 | { |
| 102 | struct mmc_csd *csd = &card->csd; |
| 103 | unsigned int e, m, csd_struct; |
| 104 | u32 *resp = card->raw_csd; |
| 105 | |
| 106 | csd_struct = UNSTUFF_BITS(resp, 126, 2); |
| 107 | |
| 108 | switch (csd_struct) { |
| 109 | case 0: |
| 110 | m = UNSTUFF_BITS(resp, 115, 4); |
| 111 | e = UNSTUFF_BITS(resp, 112, 3); |
| 112 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; |
| 113 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; |
| 114 | |
| 115 | m = UNSTUFF_BITS(resp, 99, 4); |
| 116 | e = UNSTUFF_BITS(resp, 96, 3); |
| 117 | csd->max_dtr = tran_exp[e] * tran_mant[m]; |
| 118 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); |
| 119 | |
| 120 | e = UNSTUFF_BITS(resp, 47, 3); |
| 121 | m = UNSTUFF_BITS(resp, 62, 12); |
| 122 | csd->capacity = (1 + m) << (e + 2); |
| 123 | |
| 124 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); |
| 125 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); |
| 126 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); |
| 127 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); |
Sascha Hauer | 3d705d1 | 2014-08-19 10:45:51 +0200 | [diff] [blame] | 128 | csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 129 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); |
| 130 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); |
| 131 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 132 | |
| 133 | if (UNSTUFF_BITS(resp, 46, 1)) { |
| 134 | csd->erase_size = 1; |
| 135 | } else if (csd->write_blkbits >= 9) { |
| 136 | csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; |
| 137 | csd->erase_size <<= csd->write_blkbits - 9; |
| 138 | } |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 139 | break; |
| 140 | case 1: |
| 141 | /* |
Arindam Nath | 3a30351 | 2011-05-05 12:19:03 +0530 | [diff] [blame] | 142 | * This is a block-addressed SDHC or SDXC card. Most |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 143 | * interesting fields are unused and have fixed |
| 144 | * values. To avoid getting tripped by buggy cards, |
| 145 | * we assume those fixed values ourselves. |
| 146 | */ |
| 147 | mmc_card_set_blockaddr(card); |
| 148 | |
| 149 | csd->tacc_ns = 0; /* Unused */ |
| 150 | csd->tacc_clks = 0; /* Unused */ |
| 151 | |
| 152 | m = UNSTUFF_BITS(resp, 99, 4); |
| 153 | e = UNSTUFF_BITS(resp, 96, 3); |
| 154 | csd->max_dtr = tran_exp[e] * tran_mant[m]; |
| 155 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); |
Arindam Nath | 3a30351 | 2011-05-05 12:19:03 +0530 | [diff] [blame] | 156 | csd->c_size = UNSTUFF_BITS(resp, 48, 22); |
| 157 | |
| 158 | /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ |
| 159 | if (csd->c_size >= 0xFFFF) |
| 160 | mmc_card_set_ext_capacity(card); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 161 | |
| 162 | m = UNSTUFF_BITS(resp, 48, 22); |
| 163 | csd->capacity = (1 + m) << 10; |
| 164 | |
| 165 | csd->read_blkbits = 9; |
| 166 | csd->read_partial = 0; |
| 167 | csd->write_misalign = 0; |
| 168 | csd->read_misalign = 0; |
| 169 | csd->r2w_factor = 4; /* Unused */ |
| 170 | csd->write_blkbits = 9; |
| 171 | csd->write_partial = 0; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 172 | csd->erase_size = 1; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 173 | break; |
| 174 | default: |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 175 | pr_err("%s: unrecognised CSD structure version %d\n", |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 176 | mmc_hostname(card->host), csd_struct); |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 177 | return -EINVAL; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 178 | } |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 179 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 180 | card->erase_size = csd->erase_size; |
| 181 | |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 182 | return 0; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | /* |
| 186 | * Given a 64-bit response, decode to our card SCR structure. |
| 187 | */ |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 188 | static int mmc_decode_scr(struct mmc_card *card) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 189 | { |
| 190 | struct sd_scr *scr = &card->scr; |
| 191 | unsigned int scr_struct; |
| 192 | u32 resp[4]; |
| 193 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 194 | resp[3] = card->raw_scr[1]; |
| 195 | resp[2] = card->raw_scr[0]; |
| 196 | |
| 197 | scr_struct = UNSTUFF_BITS(resp, 60, 4); |
| 198 | if (scr_struct != 0) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 199 | pr_err("%s: unrecognised SCR structure version %d\n", |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 200 | mmc_hostname(card->host), scr_struct); |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 201 | return -EINVAL; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); |
| 205 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 206 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
| 207 | /* Check if Physical Layer Spec v3.0 is supported */ |
| 208 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 209 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 210 | if (UNSTUFF_BITS(resp, 55, 1)) |
| 211 | card->erased_byte = 0xFF; |
| 212 | else |
| 213 | card->erased_byte = 0x0; |
| 214 | |
Andrei Warkentin | f0d8997 | 2011-05-23 15:06:38 -0500 | [diff] [blame] | 215 | if (scr->sda_spec3) |
| 216 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 217 | return 0; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | /* |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 221 | * Fetch and process SD Status register. |
| 222 | */ |
| 223 | static int mmc_read_ssr(struct mmc_card *card) |
| 224 | { |
| 225 | unsigned int au, es, et, eo; |
Wolfram Sang | 9288cac | 2013-11-26 02:16:25 +0100 | [diff] [blame] | 226 | int err, i; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 227 | u32 *ssr; |
| 228 | |
| 229 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 230 | pr_warn("%s: card lacks mandatory SD Status function\n", |
| 231 | mmc_hostname(card->host)); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | ssr = kmalloc(64, GFP_KERNEL); |
| 236 | if (!ssr) |
| 237 | return -ENOMEM; |
| 238 | |
| 239 | err = mmc_app_sd_status(card, ssr); |
| 240 | if (err) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 241 | pr_warn("%s: problem reading SD Status register\n", |
| 242 | mmc_hostname(card->host)); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 243 | err = 0; |
| 244 | goto out; |
| 245 | } |
| 246 | |
| 247 | for (i = 0; i < 16; i++) |
| 248 | ssr[i] = be32_to_cpu(ssr[i]); |
| 249 | |
| 250 | /* |
| 251 | * UNSTUFF_BITS only works with four u32s so we have to offset the |
| 252 | * bitfield positions accordingly. |
| 253 | */ |
| 254 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); |
Wolfram Sang | 9288cac | 2013-11-26 02:16:25 +0100 | [diff] [blame] | 255 | if (au) { |
| 256 | if (au <= 9 || card->scr.sda_spec3) { |
| 257 | card->ssr.au = sd_au_size[au]; |
| 258 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); |
| 259 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); |
| 260 | if (es && et) { |
| 261 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); |
| 262 | card->ssr.erase_timeout = (et * 1000) / es; |
| 263 | card->ssr.erase_offset = eo * 1000; |
| 264 | } |
| 265 | } else { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 266 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
| 267 | mmc_hostname(card->host)); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 268 | } |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 269 | } |
| 270 | out: |
| 271 | kfree(ssr); |
| 272 | return err; |
| 273 | } |
| 274 | |
| 275 | /* |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 276 | * Fetches and decodes switch information |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 277 | */ |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 278 | static int mmc_read_switch(struct mmc_card *card) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 279 | { |
| 280 | int err; |
| 281 | u8 *status; |
| 282 | |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 283 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 284 | return 0; |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 285 | |
| 286 | if (!(card->csd.cmdclass & CCC_SWITCH)) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 287 | pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 288 | mmc_hostname(card->host)); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 289 | return 0; |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 290 | } |
| 291 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 292 | err = -EIO; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 293 | |
| 294 | status = kmalloc(64, GFP_KERNEL); |
| 295 | if (!status) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 296 | pr_err("%s: could not allocate a buffer for " |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 297 | "switch capabilities.\n", |
| 298 | mmc_hostname(card->host)); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 299 | return -ENOMEM; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 300 | } |
| 301 | |
Aaron Lu | a39ca6ae | 2012-07-03 14:16:11 +0800 | [diff] [blame] | 302 | /* |
| 303 | * Find out the card's support bits with a mode 0 operation. |
| 304 | * The argument does not matter, as the support bits do not |
| 305 | * change with the arguments. |
| 306 | */ |
| 307 | err = mmc_sd_switch(card, 0, 0, 0, status); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 308 | if (err) { |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 309 | /* |
| 310 | * If the host or the card can't do the switch, |
| 311 | * fail more gracefully. |
| 312 | */ |
| 313 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) |
Pierre Ossman | adf66a0 | 2007-07-22 23:08:30 +0200 | [diff] [blame] | 314 | goto out; |
| 315 | |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 316 | pr_warn("%s: problem reading Bus Speed modes\n", |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 317 | mmc_hostname(card->host)); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 318 | err = 0; |
Pierre Ossman | adf66a0 | 2007-07-22 23:08:30 +0200 | [diff] [blame] | 319 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 320 | goto out; |
| 321 | } |
| 322 | |
Qiang Liu | fffe5d5 | 2011-11-08 08:43:08 -0500 | [diff] [blame] | 323 | if (status[13] & SD_MODE_HIGH_SPEED) |
| 324 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; |
Subhash Jadavani | f2815f6 | 2011-08-10 11:16:01 +0530 | [diff] [blame] | 325 | |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 326 | if (card->scr.sda_spec3) { |
| 327 | card->sw_caps.sd3_bus_mode = status[13]; |
Aaron Lu | a39ca6ae | 2012-07-03 14:16:11 +0800 | [diff] [blame] | 328 | /* Driver Strengths supported by the card */ |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 329 | card->sw_caps.sd3_drv_type = status[9]; |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 330 | card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; |
Arindam Nath | 013909c | 2011-05-05 12:18:58 +0530 | [diff] [blame] | 331 | } |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 332 | |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 333 | out: |
| 334 | kfree(status); |
| 335 | |
| 336 | return err; |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * Test if the card supports high-speed mode and, if so, switch to it. |
| 341 | */ |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 342 | int mmc_sd_switch_hs(struct mmc_card *card) |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 343 | { |
| 344 | int err; |
| 345 | u8 *status; |
| 346 | |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 347 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 348 | return 0; |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 349 | |
| 350 | if (!(card->csd.cmdclass & CCC_SWITCH)) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 351 | return 0; |
Pierre Ossman | 3373c0a | 2007-05-31 22:25:11 +0200 | [diff] [blame] | 352 | |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 353 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 354 | return 0; |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 355 | |
| 356 | if (card->sw_caps.hs_max_dtr == 0) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 357 | return 0; |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 358 | |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 359 | status = kmalloc(64, GFP_KERNEL); |
| 360 | if (!status) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 361 | pr_err("%s: could not allocate a buffer for " |
Pierre Ossman | facba91 | 2007-07-24 21:53:43 +0200 | [diff] [blame] | 362 | "switch capabilities.\n", mmc_hostname(card->host)); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 363 | return -ENOMEM; |
Pierre Ossman | 1addfcd | 2007-05-01 14:46:08 +0200 | [diff] [blame] | 364 | } |
| 365 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 366 | err = mmc_sd_switch(card, 1, 0, 1, status); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 367 | if (err) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 368 | goto out; |
| 369 | |
| 370 | if ((status[16] & 0xF) != 1) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 371 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 372 | mmc_hostname(card->host)); |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 373 | err = 0; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 374 | } else { |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 375 | err = 1; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | out: |
| 379 | kfree(status); |
| 380 | |
| 381 | return err; |
| 382 | } |
| 383 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 384 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
| 385 | { |
Adrian Hunter | fa021ce | 2015-02-06 14:12:53 +0200 | [diff] [blame] | 386 | int card_drv_type, drive_strength, drv_type; |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 387 | int err; |
| 388 | |
Adrian Hunter | 3853a04 | 2015-02-06 14:12:56 +0200 | [diff] [blame] | 389 | card->drive_strength = 0; |
| 390 | |
Adrian Hunter | fa021ce | 2015-02-06 14:12:53 +0200 | [diff] [blame] | 391 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
Philip Rakity | ca8e99b | 2011-07-06 08:51:32 -0700 | [diff] [blame] | 392 | |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 393 | drive_strength = mmc_select_drive_strength(card, |
| 394 | card->sw_caps.uhs_max_dtr, |
| 395 | card_drv_type, &drv_type); |
Philip Rakity | ca8e99b | 2011-07-06 08:51:32 -0700 | [diff] [blame] | 396 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 397 | if (drive_strength) { |
| 398 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); |
| 399 | if (err) |
| 400 | return err; |
| 401 | if ((status[15] & 0xF) != drive_strength) { |
| 402 | pr_warn("%s: Problem setting drive strength!\n", |
| 403 | mmc_hostname(card->host)); |
| 404 | return 0; |
| 405 | } |
Adrian Hunter | 3853a04 | 2015-02-06 14:12:56 +0200 | [diff] [blame] | 406 | card->drive_strength = drive_strength; |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 407 | } |
| 408 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 409 | if (drv_type) |
| 410 | mmc_set_driver_type(card->host, drv_type); |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 415 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 416 | { |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 417 | /* |
| 418 | * If the host doesn't support any of the UHS-I modes, fallback on |
| 419 | * default speed. |
| 420 | */ |
Johan Rudholm | 3f8a7fa | 2013-01-28 15:08:24 +0100 | [diff] [blame] | 421 | if (!mmc_host_uhs(card->host)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 422 | card->sd_bus_speed = 0; |
| 423 | return; |
| 424 | } |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 425 | |
| 426 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && |
| 427 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 428 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 429 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
| 430 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 431 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 432 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
| 433 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & |
| 434 | SD_MODE_UHS_SDR50)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 435 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 436 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
| 437 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && |
| 438 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 439 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 440 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
| 441 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | |
| 442 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & |
| 443 | SD_MODE_UHS_SDR12)) { |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 444 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) |
| 449 | { |
| 450 | int err; |
| 451 | unsigned int timing = 0; |
| 452 | |
| 453 | switch (card->sd_bus_speed) { |
| 454 | case UHS_SDR104_BUS_SPEED: |
| 455 | timing = MMC_TIMING_UHS_SDR104; |
| 456 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; |
| 457 | break; |
| 458 | case UHS_DDR50_BUS_SPEED: |
| 459 | timing = MMC_TIMING_UHS_DDR50; |
| 460 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; |
| 461 | break; |
| 462 | case UHS_SDR50_BUS_SPEED: |
| 463 | timing = MMC_TIMING_UHS_SDR50; |
| 464 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; |
| 465 | break; |
| 466 | case UHS_SDR25_BUS_SPEED: |
| 467 | timing = MMC_TIMING_UHS_SDR25; |
| 468 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; |
| 469 | break; |
| 470 | case UHS_SDR12_BUS_SPEED: |
| 471 | timing = MMC_TIMING_UHS_SDR12; |
| 472 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; |
| 473 | break; |
| 474 | default: |
| 475 | return 0; |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 476 | } |
| 477 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 478 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 479 | if (err) |
| 480 | return err; |
| 481 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 482 | if ((status[16] & 0xF) != card->sd_bus_speed) |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 483 | pr_warn("%s: Problem setting bus speed mode!\n", |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 484 | mmc_hostname(card->host)); |
| 485 | else { |
| 486 | mmc_set_timing(card->host, timing); |
| 487 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); |
| 488 | } |
| 489 | |
| 490 | return 0; |
| 491 | } |
| 492 | |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 493 | /* Get host's max current setting at its current voltage */ |
| 494 | static u32 sd_get_host_max_current(struct mmc_host *host) |
| 495 | { |
| 496 | u32 voltage, max_current; |
| 497 | |
| 498 | voltage = 1 << host->ios.vdd; |
| 499 | switch (voltage) { |
| 500 | case MMC_VDD_165_195: |
| 501 | max_current = host->max_current_180; |
| 502 | break; |
| 503 | case MMC_VDD_29_30: |
| 504 | case MMC_VDD_30_31: |
| 505 | max_current = host->max_current_300; |
| 506 | break; |
| 507 | case MMC_VDD_32_33: |
| 508 | case MMC_VDD_33_34: |
| 509 | max_current = host->max_current_330; |
| 510 | break; |
| 511 | default: |
| 512 | max_current = 0; |
| 513 | } |
| 514 | |
| 515 | return max_current; |
| 516 | } |
| 517 | |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 518 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
| 519 | { |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 520 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 521 | int err; |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 522 | u32 max_current; |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 523 | |
| 524 | /* |
| 525 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 526 | * bus speed modes. For other bus speed modes, we do not change the |
| 527 | * current limit. |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 528 | */ |
| 529 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && |
| 530 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && |
| 531 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) |
| 532 | return 0; |
| 533 | |
| 534 | /* |
| 535 | * Host has different current capabilities when operating at |
| 536 | * different voltages, so find out its max current first. |
| 537 | */ |
| 538 | max_current = sd_get_host_max_current(card->host); |
| 539 | |
| 540 | /* |
Aaron Lu | a39ca6ae | 2012-07-03 14:16:11 +0800 | [diff] [blame] | 541 | * We only check host's capability here, if we set a limit that is |
| 542 | * higher than the card's maximum current, the card will be using its |
| 543 | * maximum current, e.g. if the card's maximum current is 300ma, and |
| 544 | * when we set current limit to 200ma, the card will draw 200ma, and |
| 545 | * when we set current limit to 400/600/800ma, the card will draw its |
| 546 | * maximum 300ma from the host. |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 547 | * |
| 548 | * The above is incorrect: if we try to set a current limit that is |
| 549 | * not supported by the card, the card can rightfully error out the |
| 550 | * attempt, and remain at the default current limit. This results |
| 551 | * in a 300mA card being limited to 200mA even though the host |
| 552 | * supports 800mA. Failures seen with SanDisk 8GB UHS cards with |
| 553 | * an iMX6 host. --rmk |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 554 | */ |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 555 | if (max_current >= 800 && |
| 556 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 557 | current_limit = SD_SET_CURRENT_LIMIT_800; |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 558 | else if (max_current >= 600 && |
| 559 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 560 | current_limit = SD_SET_CURRENT_LIMIT_600; |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 561 | else if (max_current >= 400 && |
| 562 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 563 | current_limit = SD_SET_CURRENT_LIMIT_400; |
Russell King | d981278 | 2016-01-02 10:06:29 +0000 | [diff] [blame] | 564 | else if (max_current >= 200 && |
| 565 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 566 | current_limit = SD_SET_CURRENT_LIMIT_200; |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 567 | |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 568 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
| 569 | err = mmc_sd_switch(card, 1, 3, current_limit, status); |
| 570 | if (err) |
| 571 | return err; |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 572 | |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 573 | if (((status[15] >> 4) & 0x0F) != current_limit) |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 574 | pr_warn("%s: Problem setting current limit!\n", |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 575 | mmc_hostname(card->host)); |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 576 | |
Philip Rakity | 0aa6770 | 2012-05-27 18:36:33 -0700 | [diff] [blame] | 577 | } |
Aaron Lu | a39ca6ae | 2012-07-03 14:16:11 +0800 | [diff] [blame] | 578 | |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 579 | return 0; |
| 580 | } |
| 581 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 582 | /* |
| 583 | * UHS-I specific initialization procedure |
| 584 | */ |
| 585 | static int mmc_sd_init_uhs_card(struct mmc_card *card) |
| 586 | { |
| 587 | int err; |
| 588 | u8 *status; |
| 589 | |
| 590 | if (!card->scr.sda_spec3) |
| 591 | return 0; |
| 592 | |
| 593 | if (!(card->csd.cmdclass & CCC_SWITCH)) |
| 594 | return 0; |
| 595 | |
| 596 | status = kmalloc(64, GFP_KERNEL); |
| 597 | if (!status) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 598 | pr_err("%s: could not allocate a buffer for " |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 599 | "switch capabilities.\n", mmc_hostname(card->host)); |
| 600 | return -ENOMEM; |
| 601 | } |
| 602 | |
| 603 | /* Set 4-bit bus width */ |
| 604 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && |
| 605 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { |
| 606 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
| 607 | if (err) |
| 608 | goto out; |
| 609 | |
| 610 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); |
| 611 | } |
| 612 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 613 | /* |
| 614 | * Select the bus speed mode depending on host |
| 615 | * and card capability. |
| 616 | */ |
| 617 | sd_update_bus_speed_mode(card); |
| 618 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 619 | /* Set the driver strength for the card */ |
| 620 | err = sd_select_driver_type(card, status); |
Arindam Nath | 49c468f | 2011-05-05 12:19:01 +0530 | [diff] [blame] | 621 | if (err) |
| 622 | goto out; |
| 623 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 624 | /* Set current limit for the card */ |
| 625 | err = sd_set_current_limit(card, status); |
Arindam Nath | 5371c92 | 2011-05-05 12:19:02 +0530 | [diff] [blame] | 626 | if (err) |
| 627 | goto out; |
| 628 | |
Subhash Jadavani | 93c712f | 2011-08-09 12:19:31 +0530 | [diff] [blame] | 629 | /* Set bus speed mode of the card */ |
| 630 | err = sd_set_bus_speed_mode(card, status); |
Arindam Nath | b513ea2 | 2011-05-05 12:19:04 +0530 | [diff] [blame] | 631 | if (err) |
| 632 | goto out; |
| 633 | |
Fredrik Soderstedt | 810e08e | 2013-04-17 13:50:53 +0200 | [diff] [blame] | 634 | /* |
| 635 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and |
| 636 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. |
| 637 | */ |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 638 | if (!mmc_host_is_spi(card->host) && |
Carlo Caione | e10c321 | 2016-01-13 09:36:55 +0100 | [diff] [blame] | 639 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
| 640 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || |
| 641 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 642 | err = mmc_execute_tuning(card); |
Weijun Yang | 4324f6d | 2015-10-04 12:04:11 +0000 | [diff] [blame] | 643 | |
| 644 | /* |
| 645 | * As SD Specifications Part1 Physical Layer Specification |
| 646 | * Version 3.01 says, CMD19 tuning is available for unlocked |
| 647 | * cards in transfer state of 1.8V signaling mode. The small |
| 648 | * difference between v3.00 and 3.01 spec means that CMD19 |
| 649 | * tuning is also available for DDR50 mode. |
| 650 | */ |
Carlo Caione | e10c321 | 2016-01-13 09:36:55 +0100 | [diff] [blame] | 651 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
Weijun Yang | 4324f6d | 2015-10-04 12:04:11 +0000 | [diff] [blame] | 652 | pr_warn("%s: ddr50 tuning failed\n", |
| 653 | mmc_hostname(card->host)); |
| 654 | err = 0; |
| 655 | } |
| 656 | } |
| 657 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 658 | out: |
| 659 | kfree(status); |
| 660 | |
| 661 | return err; |
| 662 | } |
| 663 | |
Pierre Ossman | 51ec92e | 2008-03-21 23:54:50 +0100 | [diff] [blame] | 664 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
| 665 | card->raw_cid[2], card->raw_cid[3]); |
| 666 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], |
| 667 | card->raw_csd[2], card->raw_csd[3]); |
| 668 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); |
| 669 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 670 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
| 671 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); |
Pierre Ossman | 51ec92e | 2008-03-21 23:54:50 +0100 | [diff] [blame] | 672 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
| 673 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); |
| 674 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); |
| 675 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); |
| 676 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); |
| 677 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); |
| 678 | |
| 679 | |
| 680 | static struct attribute *sd_std_attrs[] = { |
| 681 | &dev_attr_cid.attr, |
| 682 | &dev_attr_csd.attr, |
| 683 | &dev_attr_scr.attr, |
| 684 | &dev_attr_date.attr, |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 685 | &dev_attr_erase_size.attr, |
| 686 | &dev_attr_preferred_erase_size.attr, |
Pierre Ossman | 51ec92e | 2008-03-21 23:54:50 +0100 | [diff] [blame] | 687 | &dev_attr_fwrev.attr, |
| 688 | &dev_attr_hwrev.attr, |
| 689 | &dev_attr_manfid.attr, |
| 690 | &dev_attr_name.attr, |
| 691 | &dev_attr_oemid.attr, |
| 692 | &dev_attr_serial.attr, |
| 693 | NULL, |
| 694 | }; |
Axel Lin | d1e5821 | 2014-03-08 15:05:27 +0800 | [diff] [blame] | 695 | ATTRIBUTE_GROUPS(sd_std); |
Pierre Ossman | 51ec92e | 2008-03-21 23:54:50 +0100 | [diff] [blame] | 696 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 697 | struct device_type sd_type = { |
Axel Lin | d1e5821 | 2014-03-08 15:05:27 +0800 | [diff] [blame] | 698 | .groups = sd_std_groups, |
Pierre Ossman | 51ec92e | 2008-03-21 23:54:50 +0100 | [diff] [blame] | 699 | }; |
| 700 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 701 | /* |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 702 | * Fetch CID from card. |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 703 | */ |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 704 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 705 | { |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 706 | int err; |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 707 | u32 max_current; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 708 | int retries = 10; |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 709 | u32 pocr = ocr; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 710 | |
| 711 | try_again: |
| 712 | if (!retries) { |
| 713 | ocr &= ~SD_OCR_S18R; |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 714 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 715 | } |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 716 | |
| 717 | /* |
| 718 | * Since we're changing the OCR value, we seem to |
| 719 | * need to tell some cards to go back to the idle |
| 720 | * state. We wait 1ms to give cards time to |
| 721 | * respond. |
| 722 | */ |
| 723 | mmc_go_idle(host); |
| 724 | |
| 725 | /* |
| 726 | * If SD_SEND_IF_COND indicates an SD 2.0 |
| 727 | * compliant card and we should set bit 30 |
| 728 | * of the ocr to indicate that we can handle |
| 729 | * block-addressed SDHC cards. |
| 730 | */ |
| 731 | err = mmc_send_if_cond(host, ocr); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 732 | if (!err) |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 733 | ocr |= SD_OCR_CCS; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 734 | |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 735 | /* |
| 736 | * If the host supports one of UHS-I modes, request the card |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 737 | * to switch to 1.8V signaling level. If the card has failed |
| 738 | * repeatedly to switch however, skip this. |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 739 | */ |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 740 | if (retries && mmc_host_uhs(host)) |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 741 | ocr |= SD_OCR_S18R; |
| 742 | |
Aaron Lu | 55c4665 | 2012-07-04 13:31:48 +0800 | [diff] [blame] | 743 | /* |
| 744 | * If the host can supply more than 150mA at current voltage, |
| 745 | * XPC should be set to 1. |
| 746 | */ |
| 747 | max_current = sd_get_host_max_current(host); |
| 748 | if (max_current > 150) |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 749 | ocr |= SD_OCR_XPC; |
| 750 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 751 | err = mmc_send_app_op_cond(host, ocr, rocr); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 752 | if (err) |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 753 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 754 | |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 755 | /* |
| 756 | * In case CCS and S18A in the response is set, start Signal Voltage |
| 757 | * Switch procedure. SPI mode doesn't support CMD11. |
| 758 | */ |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 759 | if (!mmc_host_is_spi(host) && rocr && |
| 760 | ((*rocr & 0x41000000) == 0x41000000)) { |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 761 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 762 | pocr); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 763 | if (err == -EAGAIN) { |
| 764 | retries--; |
| 765 | goto try_again; |
| 766 | } else if (err) { |
| 767 | retries = 0; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 768 | goto try_again; |
| 769 | } |
| 770 | } |
| 771 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 772 | if (mmc_host_is_spi(host)) |
| 773 | err = mmc_send_cid(host, cid); |
| 774 | else |
| 775 | err = mmc_all_send_cid(host, cid); |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 776 | |
| 777 | return err; |
| 778 | } |
| 779 | |
| 780 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) |
| 781 | { |
| 782 | int err; |
| 783 | |
| 784 | /* |
| 785 | * Fetch CSD from card. |
| 786 | */ |
| 787 | err = mmc_send_csd(card, card->raw_csd); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 788 | if (err) |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 789 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 790 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 791 | err = mmc_decode_csd(card); |
| 792 | if (err) |
| 793 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 794 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 795 | return 0; |
| 796 | } |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 797 | |
Lars-Peter Clausen | 9f6e0bf | 2015-05-06 20:31:19 +0200 | [diff] [blame] | 798 | static int mmc_sd_get_ro(struct mmc_host *host) |
| 799 | { |
| 800 | int ro; |
| 801 | |
| 802 | /* |
| 803 | * Some systems don't feature a write-protect pin and don't need one. |
| 804 | * E.g. because they only have micro-SD card slot. For those systems |
| 805 | * assume that the SD card is always read-write. |
| 806 | */ |
| 807 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) |
| 808 | return 0; |
| 809 | |
| 810 | if (!host->ops->get_ro) |
| 811 | return -1; |
| 812 | |
Lars-Peter Clausen | 9f6e0bf | 2015-05-06 20:31:19 +0200 | [diff] [blame] | 813 | ro = host->ops->get_ro(host); |
Lars-Peter Clausen | 9f6e0bf | 2015-05-06 20:31:19 +0200 | [diff] [blame] | 814 | |
| 815 | return ro; |
| 816 | } |
| 817 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 818 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
| 819 | bool reinit) |
| 820 | { |
| 821 | int err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 822 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 823 | if (!reinit) { |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 824 | /* |
| 825 | * Fetch SCR from card. |
| 826 | */ |
| 827 | err = mmc_app_send_scr(card, card->raw_scr); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 828 | if (err) |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 829 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 830 | |
Pierre Ossman | bd76631 | 2007-05-01 16:11:57 +0200 | [diff] [blame] | 831 | err = mmc_decode_scr(card); |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 832 | if (err) |
| 833 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 834 | |
| 835 | /* |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 836 | * Fetch and process SD Status register. |
| 837 | */ |
| 838 | err = mmc_read_ssr(card); |
| 839 | if (err) |
| 840 | return err; |
| 841 | |
| 842 | /* Erase init depends on CSD and SSR */ |
| 843 | mmc_init_erase(card); |
| 844 | |
| 845 | /* |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 846 | * Fetch switch information from card. |
| 847 | */ |
| 848 | err = mmc_read_switch(card); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 849 | if (err) |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 850 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 851 | } |
| 852 | |
| 853 | /* |
Wolfgang Muees | 9d9f25c | 2009-04-07 14:48:16 +0100 | [diff] [blame] | 854 | * For SPI, enable CRC as appropriate. |
| 855 | * This CRC enable is located AFTER the reading of the |
| 856 | * card registers because some SDHC cards are not able |
| 857 | * to provide valid CRCs for non-512-byte blocks. |
| 858 | */ |
| 859 | if (mmc_host_is_spi(host)) { |
| 860 | err = mmc_spi_set_crc(host, use_spi_crc); |
| 861 | if (err) |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 862 | return err; |
Wolfgang Muees | 9d9f25c | 2009-04-07 14:48:16 +0100 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | /* |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 866 | * Check if read-only switch is active. |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 867 | */ |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 868 | if (!reinit) { |
Lars-Peter Clausen | 9f6e0bf | 2015-05-06 20:31:19 +0200 | [diff] [blame] | 869 | int ro = mmc_sd_get_ro(host); |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 870 | |
| 871 | if (ro < 0) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 872 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 873 | mmc_hostname(host)); |
| 874 | } else if (ro > 0) { |
| 875 | mmc_card_set_readonly(card); |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) |
| 883 | { |
| 884 | unsigned max_dtr = (unsigned int)-1; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 885 | |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 886 | if (mmc_card_hs(card)) { |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 887 | if (max_dtr > card->sw_caps.hs_max_dtr) |
| 888 | max_dtr = card->sw_caps.hs_max_dtr; |
| 889 | } else if (max_dtr > card->csd.max_dtr) { |
| 890 | max_dtr = card->csd.max_dtr; |
| 891 | } |
| 892 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 893 | return max_dtr; |
| 894 | } |
| 895 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 896 | /* |
| 897 | * Handle the detection and initialisation of a card. |
| 898 | * |
| 899 | * In the case of a resume, "oldcard" will contain the card |
| 900 | * we're trying to reinitialise. |
| 901 | */ |
| 902 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, |
| 903 | struct mmc_card *oldcard) |
| 904 | { |
| 905 | struct mmc_card *card; |
| 906 | int err; |
| 907 | u32 cid[4]; |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 908 | u32 rocr = 0; |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 909 | |
| 910 | BUG_ON(!host); |
| 911 | WARN_ON(!host->claimed); |
| 912 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 913 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 914 | if (err) |
| 915 | return err; |
| 916 | |
| 917 | if (oldcard) { |
| 918 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) |
| 919 | return -ENOENT; |
| 920 | |
| 921 | card = oldcard; |
| 922 | } else { |
| 923 | /* |
| 924 | * Allocate card structure. |
| 925 | */ |
| 926 | card = mmc_alloc_card(host, &sd_type); |
| 927 | if (IS_ERR(card)) |
| 928 | return PTR_ERR(card); |
| 929 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 930 | card->ocr = ocr; |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 931 | card->type = MMC_TYPE_SD; |
| 932 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); |
| 933 | } |
| 934 | |
| 935 | /* |
Doug Anderson | eac8632 | 2014-12-02 15:42:45 -0800 | [diff] [blame] | 936 | * Call the optional HC's init_card function to handle quirks. |
| 937 | */ |
| 938 | if (host->ops->init_card) |
| 939 | host->ops->init_card(host, card); |
| 940 | |
| 941 | /* |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 942 | * For native busses: get card RCA and quit open drain mode. |
| 943 | */ |
| 944 | if (!mmc_host_is_spi(host)) { |
| 945 | err = mmc_send_relative_addr(host, &card->rca); |
| 946 | if (err) |
Wei WANG | 7fca967 | 2013-07-17 14:21:10 +0800 | [diff] [blame] | 947 | goto free_card; |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | if (!oldcard) { |
| 951 | err = mmc_sd_get_csd(host, card); |
| 952 | if (err) |
Wei WANG | 7fca967 | 2013-07-17 14:21:10 +0800 | [diff] [blame] | 953 | goto free_card; |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 954 | |
| 955 | mmc_decode_cid(card); |
| 956 | } |
| 957 | |
| 958 | /* |
Sascha Hauer | 3d705d1 | 2014-08-19 10:45:51 +0200 | [diff] [blame] | 959 | * handling only for cards supporting DSR and hosts requesting |
| 960 | * DSR configuration |
| 961 | */ |
| 962 | if (card->csd.dsr_imp && host->dsr_req) |
| 963 | mmc_set_dsr(host); |
| 964 | |
| 965 | /* |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 966 | * Select card, as all following commands rely on that. |
| 967 | */ |
| 968 | if (!mmc_host_is_spi(host)) { |
| 969 | err = mmc_select_card(card); |
| 970 | if (err) |
Wei WANG | 7fca967 | 2013-07-17 14:21:10 +0800 | [diff] [blame] | 971 | goto free_card; |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
| 975 | if (err) |
| 976 | goto free_card; |
| 977 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 978 | /* Initialization sequence for UHS-I cards */ |
| 979 | if (rocr & SD_ROCR_S18A) { |
| 980 | err = mmc_sd_init_uhs_card(card); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 981 | if (err) |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 982 | goto free_card; |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 983 | } else { |
| 984 | /* |
| 985 | * Attempt to change to high-speed (if supported) |
| 986 | */ |
| 987 | err = mmc_sd_switch_hs(card); |
| 988 | if (err > 0) |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 989 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 990 | else if (err) |
| 991 | goto free_card; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 992 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 993 | /* |
| 994 | * Set bus speed. |
| 995 | */ |
| 996 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); |
| 997 | |
| 998 | /* |
| 999 | * Switch to wider bus (if supported). |
| 1000 | */ |
| 1001 | if ((host->caps & MMC_CAP_4_BIT_DATA) && |
| 1002 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { |
| 1003 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
| 1004 | if (err) |
| 1005 | goto free_card; |
| 1006 | |
| 1007 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); |
| 1008 | } |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1009 | } |
| 1010 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 1011 | host->card = card; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 1012 | return 0; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1013 | |
| 1014 | free_card: |
| 1015 | if (!oldcard) |
| 1016 | mmc_remove_card(card); |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1017 | |
Pierre Ossman | adf66a0 | 2007-07-22 23:08:30 +0200 | [diff] [blame] | 1018 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1019 | } |
| 1020 | |
| 1021 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1022 | * Host is being removed. Free up the current card. |
| 1023 | */ |
| 1024 | static void mmc_sd_remove(struct mmc_host *host) |
| 1025 | { |
| 1026 | BUG_ON(!host); |
| 1027 | BUG_ON(!host->card); |
| 1028 | |
| 1029 | mmc_remove_card(host->card); |
| 1030 | host->card = NULL; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 1034 | * Card detection - card is alive. |
| 1035 | */ |
| 1036 | static int mmc_sd_alive(struct mmc_host *host) |
| 1037 | { |
| 1038 | return mmc_send_status(host->card, NULL); |
| 1039 | } |
| 1040 | |
| 1041 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1042 | * Card detection callback from host. |
| 1043 | */ |
| 1044 | static void mmc_sd_detect(struct mmc_host *host) |
| 1045 | { |
| 1046 | int err; |
| 1047 | |
| 1048 | BUG_ON(!host); |
| 1049 | BUG_ON(!host->card); |
| 1050 | |
Ulf Hansson | e94cfef | 2013-05-02 14:02:38 +0200 | [diff] [blame] | 1051 | mmc_get_card(host->card); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1052 | |
| 1053 | /* |
| 1054 | * Just check if our card has been removed. |
| 1055 | */ |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 1056 | err = _mmc_detect_card_removed(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1057 | |
Ulf Hansson | e94cfef | 2013-05-02 14:02:38 +0200 | [diff] [blame] | 1058 | mmc_put_card(host->card); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1059 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 1060 | if (err) { |
Pierre Ossman | 4101c16 | 2007-05-19 13:39:01 +0200 | [diff] [blame] | 1061 | mmc_sd_remove(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1062 | |
| 1063 | mmc_claim_host(host); |
| 1064 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 1065 | mmc_power_off(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1066 | mmc_release_host(host); |
| 1067 | } |
| 1068 | } |
| 1069 | |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1070 | static int _mmc_sd_suspend(struct mmc_host *host) |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1071 | { |
Jaehoon Chung | 85e727e | 2012-05-31 20:31:47 +0900 | [diff] [blame] | 1072 | int err = 0; |
| 1073 | |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1074 | BUG_ON(!host); |
| 1075 | BUG_ON(!host->card); |
| 1076 | |
| 1077 | mmc_claim_host(host); |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1078 | |
| 1079 | if (mmc_card_suspended(host->card)) |
| 1080 | goto out; |
| 1081 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 1082 | if (!mmc_host_is_spi(host)) |
Jaehoon Chung | 85e727e | 2012-05-31 20:31:47 +0900 | [diff] [blame] | 1083 | err = mmc_deselect_cards(host); |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 1084 | |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1085 | if (!err) { |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 1086 | mmc_power_off(host); |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1087 | mmc_card_set_suspended(host->card); |
| 1088 | } |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 1089 | |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1090 | out: |
| 1091 | mmc_release_host(host); |
Jaehoon Chung | 85e727e | 2012-05-31 20:31:47 +0900 | [diff] [blame] | 1092 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | /* |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1096 | * Callback for suspend |
| 1097 | */ |
| 1098 | static int mmc_sd_suspend(struct mmc_host *host) |
| 1099 | { |
| 1100 | int err; |
| 1101 | |
| 1102 | err = _mmc_sd_suspend(host); |
| 1103 | if (!err) { |
| 1104 | pm_runtime_disable(&host->card->dev); |
| 1105 | pm_runtime_set_suspended(&host->card->dev); |
| 1106 | } |
| 1107 | |
| 1108 | return err; |
| 1109 | } |
| 1110 | |
| 1111 | /* |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1112 | * This function tries to determine if the same card is still present |
| 1113 | * and, if so, restore all state to it. |
| 1114 | */ |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1115 | static int _mmc_sd_resume(struct mmc_host *host) |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1116 | { |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1117 | int err = 0; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1118 | |
| 1119 | BUG_ON(!host); |
| 1120 | BUG_ON(!host->card); |
| 1121 | |
| 1122 | mmc_claim_host(host); |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1123 | |
| 1124 | if (!mmc_card_suspended(host->card)) |
| 1125 | goto out; |
| 1126 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1127 | mmc_power_up(host, host->card->ocr); |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1128 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1129 | mmc_card_clr_suspended(host->card); |
Pierre Ossman | 2986d0b | 2007-07-22 17:52:06 +0200 | [diff] [blame] | 1130 | |
Ulf Hansson | 9ec775f | 2013-10-02 17:37:09 +0200 | [diff] [blame] | 1131 | out: |
| 1132 | mmc_release_host(host); |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 1133 | return err; |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1134 | } |
| 1135 | |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1136 | /* |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1137 | * Callback for resume |
| 1138 | */ |
| 1139 | static int mmc_sd_resume(struct mmc_host *host) |
| 1140 | { |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1141 | pm_runtime_enable(&host->card->dev); |
Ulf Hansson | c29536e | 2015-11-05 16:01:32 +0100 | [diff] [blame] | 1142 | return 0; |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | /* |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1146 | * Callback for runtime_suspend. |
| 1147 | */ |
| 1148 | static int mmc_sd_runtime_suspend(struct mmc_host *host) |
| 1149 | { |
| 1150 | int err; |
| 1151 | |
| 1152 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) |
| 1153 | return 0; |
| 1154 | |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1155 | err = _mmc_sd_suspend(host); |
Ulf Hansson | 0cc81a8 | 2013-10-03 11:24:44 +0200 | [diff] [blame] | 1156 | if (err) |
Masanari Iida | f42cf8d | 2015-02-24 23:11:26 +0900 | [diff] [blame] | 1157 | pr_err("%s: error %d doing aggressive suspend\n", |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1158 | mmc_hostname(host), err); |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1159 | |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1160 | return err; |
| 1161 | } |
| 1162 | |
| 1163 | /* |
| 1164 | * Callback for runtime_resume. |
| 1165 | */ |
| 1166 | static int mmc_sd_runtime_resume(struct mmc_host *host) |
| 1167 | { |
| 1168 | int err; |
| 1169 | |
Ulf Hansson | 0cb403a | 2013-10-10 14:20:05 +0200 | [diff] [blame] | 1170 | err = _mmc_sd_resume(host); |
Adrian Hunter | 520322d | 2015-12-14 15:51:27 +0200 | [diff] [blame] | 1171 | if (err && err != -ENOMEDIUM) |
Ulf Hansson | c29536e | 2015-11-05 16:01:32 +0100 | [diff] [blame] | 1172 | pr_err("%s: error %d doing runtime resume\n", |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1173 | mmc_hostname(host), err); |
| 1174 | |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1175 | return 0; |
| 1176 | } |
| 1177 | |
Johan Rudholm | dc0ecfe | 2015-01-12 15:38:06 +0100 | [diff] [blame] | 1178 | static int mmc_sd_reset(struct mmc_host *host) |
| 1179 | { |
| 1180 | mmc_power_cycle(host, host->card->ocr); |
Ulf Hansson | 3056c49 | 2015-06-01 11:14:58 +0200 | [diff] [blame] | 1181 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
Johan Rudholm | dc0ecfe | 2015-01-12 15:38:06 +0100 | [diff] [blame] | 1182 | } |
| 1183 | |
Adrian Hunter | 9feae24 | 2009-09-22 16:44:32 -0700 | [diff] [blame] | 1184 | static const struct mmc_bus_ops mmc_sd_ops = { |
| 1185 | .remove = mmc_sd_remove, |
| 1186 | .detect = mmc_sd_detect, |
Ulf Hansson | c4d770d | 2013-05-02 14:02:39 +0200 | [diff] [blame] | 1187 | .runtime_suspend = mmc_sd_runtime_suspend, |
| 1188 | .runtime_resume = mmc_sd_runtime_resume, |
Adrian Hunter | 9feae24 | 2009-09-22 16:44:32 -0700 | [diff] [blame] | 1189 | .suspend = mmc_sd_suspend, |
| 1190 | .resume = mmc_sd_resume, |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 1191 | .alive = mmc_sd_alive, |
Ulf Hansson | 5992e78 | 2013-06-10 17:03:42 +0200 | [diff] [blame] | 1192 | .shutdown = mmc_sd_suspend, |
Johan Rudholm | dc0ecfe | 2015-01-12 15:38:06 +0100 | [diff] [blame] | 1193 | .reset = mmc_sd_reset, |
Adrian Hunter | 9feae24 | 2009-09-22 16:44:32 -0700 | [diff] [blame] | 1194 | }; |
| 1195 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1196 | /* |
| 1197 | * Starting point for SD card init. |
| 1198 | */ |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1199 | int mmc_attach_sd(struct mmc_host *host) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1200 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1201 | int err; |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1202 | u32 ocr, rocr; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1203 | |
| 1204 | BUG_ON(!host); |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1205 | WARN_ON(!host->claimed); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1206 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1207 | err = mmc_send_app_op_cond(host, 0, &ocr); |
| 1208 | if (err) |
| 1209 | return err; |
| 1210 | |
Ulf Hansson | 2501c91 | 2013-10-30 01:00:18 +0100 | [diff] [blame] | 1211 | mmc_attach_bus(host, &mmc_sd_ops); |
Takashi Iwai | 8f230f4 | 2010-12-08 10:04:30 +0100 | [diff] [blame] | 1212 | if (host->ocr_avail_sd) |
| 1213 | host->ocr_avail = host->ocr_avail_sd; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1214 | |
Philip Langdale | 55556da | 2007-03-16 19:39:00 -0700 | [diff] [blame] | 1215 | /* |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 1216 | * We need to get OCR a different way for SPI. |
| 1217 | */ |
| 1218 | if (mmc_host_is_spi(host)) { |
| 1219 | mmc_go_idle(host); |
| 1220 | |
| 1221 | err = mmc_spi_read_ocr(host, 0, &ocr); |
| 1222 | if (err) |
| 1223 | goto err; |
| 1224 | } |
| 1225 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1226 | rocr = mmc_select_voltage(host, ocr); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1227 | |
| 1228 | /* |
| 1229 | * Can we support the voltage(s) of the card(s)? |
| 1230 | */ |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1231 | if (!rocr) { |
Pierre Ossman | 109b5be | 2007-07-23 00:12:10 +0200 | [diff] [blame] | 1232 | err = -EINVAL; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1233 | goto err; |
Pierre Ossman | 109b5be | 2007-07-23 00:12:10 +0200 | [diff] [blame] | 1234 | } |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1235 | |
| 1236 | /* |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1237 | * Detect and init the card. |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1238 | */ |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1239 | err = mmc_sd_init_card(host, rocr, NULL); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 1240 | if (err) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1241 | goto err; |
| 1242 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1243 | mmc_release_host(host); |
Pierre Ossman | 4101c16 | 2007-05-19 13:39:01 +0200 | [diff] [blame] | 1244 | err = mmc_add_card(host->card); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1245 | if (err) |
Pierre Ossman | 2986d0b | 2007-07-22 17:52:06 +0200 | [diff] [blame] | 1246 | goto remove_card; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1247 | |
Sergei Shtylyov | 2860d06 | 2015-10-14 23:53:03 +0300 | [diff] [blame] | 1248 | mmc_claim_host(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1249 | return 0; |
| 1250 | |
Pierre Ossman | 2986d0b | 2007-07-22 17:52:06 +0200 | [diff] [blame] | 1251 | remove_card: |
Pierre Ossman | 6abaa0c | 2007-05-01 16:00:02 +0200 | [diff] [blame] | 1252 | mmc_remove_card(host->card); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1253 | host->card = NULL; |
Pierre Ossman | 2986d0b | 2007-07-22 17:52:06 +0200 | [diff] [blame] | 1254 | mmc_claim_host(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1255 | err: |
| 1256 | mmc_detach_bus(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1257 | |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 1258 | pr_err("%s: error %d whilst initialising SD card\n", |
Pierre Ossman | 109b5be | 2007-07-23 00:12:10 +0200 | [diff] [blame] | 1259 | mmc_hostname(host), err); |
| 1260 | |
Pierre Ossman | adf66a0 | 2007-07-22 23:08:30 +0200 | [diff] [blame] | 1261 | return err; |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1262 | } |