blob: b95bd24d92f415f4c8da8d622da62be6e6a61b5e [file] [log] [blame]
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001/*
Pierre Ossman70f10482007-07-11 20:04:50 +02002 * linux/drivers/mmc/core/sd.c
Pierre Ossman7ea239d2006-12-31 00:11:32 +01003 *
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 Sang9288cac2013-11-26 02:16:25 +010014#include <linux/sizes.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090015#include <linux/slab.h>
Paul Gortmaker0205a902011-07-15 12:01:27 -040016#include <linux/stat.h>
Ulf Hansson0cb403a2013-10-10 14:20:05 +020017#include <linux/pm_runtime.h>
Pierre Ossman7ea239d2006-12-31 00:11:32 +010018
19#include <linux/mmc/host.h>
20#include <linux/mmc/card.h>
21#include <linux/mmc/mmc.h>
Pierre Ossman3373c0a2007-05-31 22:25:11 +020022#include <linux/mmc/sd.h>
Pierre Ossman7ea239d2006-12-31 00:11:32 +010023
24#include "core.h"
Pierre Ossman4101c162007-05-19 13:39:01 +020025#include "bus.h"
Pierre Ossman7ea239d2006-12-31 00:11:32 +010026#include "mmc_ops.h"
Mark Brownce101492011-02-10 10:58:37 +000027#include "sd.h"
Pierre Ossman7ea239d2006-12-31 00:11:32 +010028#include "sd_ops.h"
29
Pierre Ossman7ea239d2006-12-31 00:11:32 +010030static const unsigned int tran_exp[] = {
31 10000, 100000, 1000000, 10000000,
32 0, 0, 0, 0
33};
34
35static 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
40static const unsigned int tacc_exp[] = {
41 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
42};
43
44static 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 Sang9288cac2013-11-26 02:16:25 +010049static 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 Ossman7ea239d2006-12-31 00:11:32 +010056#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 Miroslaw71578a12010-08-10 18:01:40 -070073void mmc_decode_cid(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +010074{
75 u32 *resp = card->raw_cid;
76
Pierre Ossman7ea239d2006-12-31 00:11:32 +010077 /*
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 Ossmanbd766312007-05-01 16:11:57 +0200100static int mmc_decode_csd(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100101{
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 Hauer3d705d12014-08-19 10:45:51 +0200128 csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100129 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 Hunterdfe86cb2010-08-11 14:17:46 -0700132
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 Ossman7ea239d2006-12-31 00:11:32 +0100139 break;
140 case 1:
141 /*
Arindam Nath3a303512011-05-05 12:19:03 +0530142 * This is a block-addressed SDHC or SDXC card. Most
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100143 * 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 Nath3a303512011-05-05 12:19:03 +0530156 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 Ossman7ea239d2006-12-31 00:11:32 +0100161
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 Hunterdfe86cb2010-08-11 14:17:46 -0700172 csd->erase_size = 1;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100173 break;
174 default:
Girish K Sa3c76eb2011-10-11 11:44:09 +0530175 pr_err("%s: unrecognised CSD structure version %d\n",
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100176 mmc_hostname(card->host), csd_struct);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200177 return -EINVAL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100178 }
Pierre Ossmanbd766312007-05-01 16:11:57 +0200179
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700180 card->erase_size = csd->erase_size;
181
Pierre Ossmanbd766312007-05-01 16:11:57 +0200182 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100183}
184
185/*
186 * Given a 64-bit response, decode to our card SCR structure.
187 */
Pierre Ossmanbd766312007-05-01 16:11:57 +0200188static int mmc_decode_scr(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100189{
190 struct sd_scr *scr = &card->scr;
191 unsigned int scr_struct;
192 u32 resp[4];
193
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100194 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 Sa3c76eb2011-10-11 11:44:09 +0530199 pr_err("%s: unrecognised SCR structure version %d\n",
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100200 mmc_hostname(card->host), scr_struct);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200201 return -EINVAL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100202 }
203
204 scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
205 scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
Arindam Nath013909c2011-05-05 12:18:58 +0530206 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 Ossmanbd766312007-05-01 16:11:57 +0200209
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700210 if (UNSTUFF_BITS(resp, 55, 1))
211 card->erased_byte = 0xFF;
212 else
213 card->erased_byte = 0x0;
214
Andrei Warkentinf0d89972011-05-23 15:06:38 -0500215 if (scr->sda_spec3)
216 scr->cmds = UNSTUFF_BITS(resp, 32, 2);
Pierre Ossmanbd766312007-05-01 16:11:57 +0200217 return 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100218}
219
220/*
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700221 * Fetch and process SD Status register.
222 */
223static int mmc_read_ssr(struct mmc_card *card)
224{
225 unsigned int au, es, et, eo;
Wolfram Sang9288cac2013-11-26 02:16:25 +0100226 int err, i;
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700227 u32 *ssr;
228
229 if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
Joe Perches66061102014-09-12 14:56:56 -0700230 pr_warn("%s: card lacks mandatory SD Status function\n",
231 mmc_hostname(card->host));
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700232 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 Perches66061102014-09-12 14:56:56 -0700241 pr_warn("%s: problem reading SD Status register\n",
242 mmc_hostname(card->host));
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700243 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 Sang9288cac2013-11-26 02:16:25 +0100255 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 Perches66061102014-09-12 14:56:56 -0700266 pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
267 mmc_hostname(card->host));
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700268 }
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700269 }
270out:
271 kfree(ssr);
272 return err;
273}
274
275/*
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200276 * Fetches and decodes switch information
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100277 */
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200278static int mmc_read_switch(struct mmc_card *card)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100279{
280 int err;
281 u8 *status;
282
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200283 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
Pierre Ossman17b04292007-07-22 22:18:46 +0200284 return 0;
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200285
286 if (!(card->csd.cmdclass & CCC_SWITCH)) {
Joe Perches66061102014-09-12 14:56:56 -0700287 pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200288 mmc_hostname(card->host));
Pierre Ossman17b04292007-07-22 22:18:46 +0200289 return 0;
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200290 }
291
Pierre Ossman17b04292007-07-22 22:18:46 +0200292 err = -EIO;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100293
294 status = kmalloc(64, GFP_KERNEL);
295 if (!status) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530296 pr_err("%s: could not allocate a buffer for "
Arindam Nath013909c2011-05-05 12:18:58 +0530297 "switch capabilities.\n",
298 mmc_hostname(card->host));
Pierre Ossman17b04292007-07-22 22:18:46 +0200299 return -ENOMEM;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100300 }
301
Aaron Lua39ca6ae2012-07-03 14:16:11 +0800302 /*
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 Ossman17b04292007-07-22 22:18:46 +0200308 if (err) {
Arindam Nath013909c2011-05-05 12:18:58 +0530309 /*
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 Ossmanadf66a02007-07-22 23:08:30 +0200314 goto out;
315
Joe Perches66061102014-09-12 14:56:56 -0700316 pr_warn("%s: problem reading Bus Speed modes\n",
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200317 mmc_hostname(card->host));
Pierre Ossman17b04292007-07-22 22:18:46 +0200318 err = 0;
Pierre Ossmanadf66a02007-07-22 23:08:30 +0200319
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100320 goto out;
321 }
322
Qiang Liufffe5d52011-11-08 08:43:08 -0500323 if (status[13] & SD_MODE_HIGH_SPEED)
324 card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
Subhash Jadavanif2815f62011-08-10 11:16:01 +0530325
Arindam Nath013909c2011-05-05 12:18:58 +0530326 if (card->scr.sda_spec3) {
327 card->sw_caps.sd3_bus_mode = status[13];
Aaron Lua39ca6ae2012-07-03 14:16:11 +0800328 /* Driver Strengths supported by the card */
Arindam Nath013909c2011-05-05 12:18:58 +0530329 card->sw_caps.sd3_drv_type = status[9];
Russell Kingd9812782016-01-02 10:06:29 +0000330 card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
Arindam Nath013909c2011-05-05 12:18:58 +0530331 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100332
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200333out:
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 Miroslaw71578a12010-08-10 18:01:40 -0700342int mmc_sd_switch_hs(struct mmc_card *card)
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200343{
344 int err;
345 u8 *status;
346
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200347 if (card->scr.sda_vsn < SCR_SPEC_VER_1)
Pierre Ossman17b04292007-07-22 22:18:46 +0200348 return 0;
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200349
350 if (!(card->csd.cmdclass & CCC_SWITCH))
Pierre Ossman17b04292007-07-22 22:18:46 +0200351 return 0;
Pierre Ossman3373c0a2007-05-31 22:25:11 +0200352
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200353 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
Pierre Ossman17b04292007-07-22 22:18:46 +0200354 return 0;
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200355
356 if (card->sw_caps.hs_max_dtr == 0)
Pierre Ossman17b04292007-07-22 22:18:46 +0200357 return 0;
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200358
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200359 status = kmalloc(64, GFP_KERNEL);
360 if (!status) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530361 pr_err("%s: could not allocate a buffer for "
Pierre Ossmanfacba912007-07-24 21:53:43 +0200362 "switch capabilities.\n", mmc_hostname(card->host));
Pierre Ossman17b04292007-07-22 22:18:46 +0200363 return -ENOMEM;
Pierre Ossman1addfcd2007-05-01 14:46:08 +0200364 }
365
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100366 err = mmc_sd_switch(card, 1, 0, 1, status);
Pierre Ossman17b04292007-07-22 22:18:46 +0200367 if (err)
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100368 goto out;
369
370 if ((status[16] & 0xF) != 1) {
Joe Perches66061102014-09-12 14:56:56 -0700371 pr_warn("%s: Problem switching card into high-speed mode!\n",
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100372 mmc_hostname(card->host));
Michal Miroslaw71578a12010-08-10 18:01:40 -0700373 err = 0;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100374 } else {
Michal Miroslaw71578a12010-08-10 18:01:40 -0700375 err = 1;
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100376 }
377
378out:
379 kfree(status);
380
381 return err;
382}
383
Arindam Nathd6d50a12011-05-05 12:18:59 +0530384static int sd_select_driver_type(struct mmc_card *card, u8 *status)
385{
Adrian Hunterfa021ce2015-02-06 14:12:53 +0200386 int card_drv_type, drive_strength, drv_type;
Arindam Nathd6d50a12011-05-05 12:18:59 +0530387 int err;
388
Adrian Hunter3853a042015-02-06 14:12:56 +0200389 card->drive_strength = 0;
390
Adrian Hunterfa021ce2015-02-06 14:12:53 +0200391 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
Philip Rakityca8e99b2011-07-06 08:51:32 -0700392
Adrian Huntere23350b2015-02-06 14:12:55 +0200393 drive_strength = mmc_select_drive_strength(card,
394 card->sw_caps.uhs_max_dtr,
395 card_drv_type, &drv_type);
Philip Rakityca8e99b2011-07-06 08:51:32 -0700396
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200397 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 Hunter3853a042015-02-06 14:12:56 +0200406 card->drive_strength = drive_strength;
Arindam Nathd6d50a12011-05-05 12:18:59 +0530407 }
408
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200409 if (drv_type)
410 mmc_set_driver_type(card->host, drv_type);
Arindam Nathd6d50a12011-05-05 12:18:59 +0530411
412 return 0;
413}
414
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530415static void sd_update_bus_speed_mode(struct mmc_card *card)
Arindam Nath49c468f2011-05-05 12:19:01 +0530416{
Arindam Nath49c468f2011-05-05 12:19:01 +0530417 /*
418 * If the host doesn't support any of the UHS-I modes, fallback on
419 * default speed.
420 */
Johan Rudholm3f8a7fa2013-01-28 15:08:24 +0100421 if (!mmc_host_uhs(card->host)) {
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530422 card->sd_bus_speed = 0;
423 return;
424 }
Arindam Nath49c468f2011-05-05 12:19:01 +0530425
426 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
427 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530428 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
Arindam Nath49c468f2011-05-05 12:19:01 +0530429 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
430 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530431 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
Arindam Nath49c468f2011-05-05 12:19:01 +0530432 } 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 Jadavani93c712f2011-08-09 12:19:31 +0530435 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
Arindam Nath49c468f2011-05-05 12:19:01 +0530436 } 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 Jadavani93c712f2011-08-09 12:19:31 +0530439 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
Arindam Nath49c468f2011-05-05 12:19:01 +0530440 } 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 Jadavani93c712f2011-08-09 12:19:31 +0530444 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
445 }
446}
447
448static 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 Nath49c468f2011-05-05 12:19:01 +0530476 }
477
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530478 err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
Arindam Nath49c468f2011-05-05 12:19:01 +0530479 if (err)
480 return err;
481
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530482 if ((status[16] & 0xF) != card->sd_bus_speed)
Joe Perches66061102014-09-12 14:56:56 -0700483 pr_warn("%s: Problem setting bus speed mode!\n",
Arindam Nath49c468f2011-05-05 12:19:01 +0530484 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 Lu55c46652012-07-04 13:31:48 +0800493/* Get host's max current setting at its current voltage */
494static 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 Nath5371c922011-05-05 12:19:02 +0530518static int sd_set_current_limit(struct mmc_card *card, u8 *status)
519{
Philip Rakity0aa67702012-05-27 18:36:33 -0700520 int current_limit = SD_SET_CURRENT_NO_CHANGE;
Arindam Nath5371c922011-05-05 12:19:02 +0530521 int err;
Aaron Lu55c46652012-07-04 13:31:48 +0800522 u32 max_current;
Arindam Nath5371c922011-05-05 12:19:02 +0530523
524 /*
525 * Current limit switch is only defined for SDR50, SDR104, and DDR50
Philip Rakity0aa67702012-05-27 18:36:33 -0700526 * bus speed modes. For other bus speed modes, we do not change the
527 * current limit.
Aaron Lu55c46652012-07-04 13:31:48 +0800528 */
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 Lua39ca6ae2012-07-03 14:16:11 +0800541 * 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 Kingd9812782016-01-02 10:06:29 +0000547 *
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 Nath5371c922011-05-05 12:19:02 +0530554 */
Russell Kingd9812782016-01-02 10:06:29 +0000555 if (max_current >= 800 &&
556 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
Aaron Lu55c46652012-07-04 13:31:48 +0800557 current_limit = SD_SET_CURRENT_LIMIT_800;
Russell Kingd9812782016-01-02 10:06:29 +0000558 else if (max_current >= 600 &&
559 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
Aaron Lu55c46652012-07-04 13:31:48 +0800560 current_limit = SD_SET_CURRENT_LIMIT_600;
Russell Kingd9812782016-01-02 10:06:29 +0000561 else if (max_current >= 400 &&
562 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
Aaron Lu55c46652012-07-04 13:31:48 +0800563 current_limit = SD_SET_CURRENT_LIMIT_400;
Russell Kingd9812782016-01-02 10:06:29 +0000564 else if (max_current >= 200 &&
565 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
Aaron Lu55c46652012-07-04 13:31:48 +0800566 current_limit = SD_SET_CURRENT_LIMIT_200;
Arindam Nath5371c922011-05-05 12:19:02 +0530567
Philip Rakity0aa67702012-05-27 18:36:33 -0700568 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 Nath5371c922011-05-05 12:19:02 +0530572
Philip Rakity0aa67702012-05-27 18:36:33 -0700573 if (((status[15] >> 4) & 0x0F) != current_limit)
Joe Perches66061102014-09-12 14:56:56 -0700574 pr_warn("%s: Problem setting current limit!\n",
Philip Rakity0aa67702012-05-27 18:36:33 -0700575 mmc_hostname(card->host));
Arindam Nath5371c922011-05-05 12:19:02 +0530576
Philip Rakity0aa67702012-05-27 18:36:33 -0700577 }
Aaron Lua39ca6ae2012-07-03 14:16:11 +0800578
Arindam Nath5371c922011-05-05 12:19:02 +0530579 return 0;
580}
581
Arindam Nathd6d50a12011-05-05 12:18:59 +0530582/*
583 * UHS-I specific initialization procedure
584 */
585static 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 Sa3c76eb2011-10-11 11:44:09 +0530598 pr_err("%s: could not allocate a buffer for "
Arindam Nathd6d50a12011-05-05 12:18:59 +0530599 "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 Jadavani93c712f2011-08-09 12:19:31 +0530613 /*
614 * Select the bus speed mode depending on host
615 * and card capability.
616 */
617 sd_update_bus_speed_mode(card);
618
Arindam Nathd6d50a12011-05-05 12:18:59 +0530619 /* Set the driver strength for the card */
620 err = sd_select_driver_type(card, status);
Arindam Nath49c468f2011-05-05 12:19:01 +0530621 if (err)
622 goto out;
623
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530624 /* Set current limit for the card */
625 err = sd_set_current_limit(card, status);
Arindam Nath5371c922011-05-05 12:19:02 +0530626 if (err)
627 goto out;
628
Subhash Jadavani93c712f2011-08-09 12:19:31 +0530629 /* Set bus speed mode of the card */
630 err = sd_set_bus_speed_mode(card, status);
Arindam Nathb513ea22011-05-05 12:19:04 +0530631 if (err)
632 goto out;
633
Fredrik Soderstedt810e08e2013-04-17 13:50:53 +0200634 /*
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 Hunter63e415c2014-12-05 19:40:59 +0200638 if (!mmc_host_is_spi(card->host) &&
Carlo Caionee10c3212016-01-13 09:36:55 +0100639 (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 Hunter63e415c2014-12-05 19:40:59 +0200642 err = mmc_execute_tuning(card);
Weijun Yang4324f6d2015-10-04 12:04:11 +0000643
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 Caionee10c3212016-01-13 09:36:55 +0100651 if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
Weijun Yang4324f6d2015-10-04 12:04:11 +0000652 pr_warn("%s: ddr50 tuning failed\n",
653 mmc_hostname(card->host));
654 err = 0;
655 }
656 }
657
Arindam Nathd6d50a12011-05-05 12:18:59 +0530658out:
659 kfree(status);
660
661 return err;
662}
663
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100664MMC_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]);
666MMC_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]);
668MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
669MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700670MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
671MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100672MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
673MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
674MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
675MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
676MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
677MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
678
679
680static 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 Hunterdfe86cb2010-08-11 14:17:46 -0700685 &dev_attr_erase_size.attr,
686 &dev_attr_preferred_erase_size.attr,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100687 &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 Lind1e58212014-03-08 15:05:27 +0800695ATTRIBUTE_GROUPS(sd_std);
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100696
Michal Miroslaw71578a12010-08-10 18:01:40 -0700697struct device_type sd_type = {
Axel Lind1e58212014-03-08 15:05:27 +0800698 .groups = sd_std_groups,
Pierre Ossman51ec92e2008-03-21 23:54:50 +0100699};
700
Pierre Ossman7ea239d2006-12-31 00:11:32 +0100701/*
Michal Miroslaw71578a12010-08-10 18:01:40 -0700702 * Fetch CID from card.
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200703 */
Arindam Nathd6d50a12011-05-05 12:18:59 +0530704int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200705{
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200706 int err;
Aaron Lu55c46652012-07-04 13:31:48 +0800707 u32 max_current;
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100708 int retries = 10;
Ulf Hansson69041152013-09-13 11:31:33 +0200709 u32 pocr = ocr;
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100710
711try_again:
712 if (!retries) {
713 ocr &= ~SD_OCR_S18R;
Joe Perches66061102014-09-12 14:56:56 -0700714 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100715 }
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200716
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 Ossman17b04292007-07-22 22:18:46 +0200732 if (!err)
Arindam Nathf2119df2011-05-05 12:18:57 +0530733 ocr |= SD_OCR_CCS;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200734
Arindam Nathf2119df2011-05-05 12:18:57 +0530735 /*
736 * If the host supports one of UHS-I modes, request the card
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100737 * to switch to 1.8V signaling level. If the card has failed
738 * repeatedly to switch however, skip this.
Arindam Nathf2119df2011-05-05 12:18:57 +0530739 */
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100740 if (retries && mmc_host_uhs(host))
Arindam Nathf2119df2011-05-05 12:18:57 +0530741 ocr |= SD_OCR_S18R;
742
Aaron Lu55c46652012-07-04 13:31:48 +0800743 /*
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 Nathf2119df2011-05-05 12:18:57 +0530749 ocr |= SD_OCR_XPC;
750
Arindam Nathd6d50a12011-05-05 12:18:59 +0530751 err = mmc_send_app_op_cond(host, ocr, rocr);
Pierre Ossman17b04292007-07-22 22:18:46 +0200752 if (err)
Michal Miroslaw71578a12010-08-10 18:01:40 -0700753 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200754
Arindam Nathf2119df2011-05-05 12:18:57 +0530755 /*
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 Nathd6d50a12011-05-05 12:18:59 +0530759 if (!mmc_host_is_spi(host) && rocr &&
760 ((*rocr & 0x41000000) == 0x41000000)) {
Ulf Hansson0f791fd2013-09-12 15:36:34 +0200761 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
Ulf Hansson69041152013-09-13 11:31:33 +0200762 pocr);
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100763 if (err == -EAGAIN) {
764 retries--;
765 goto try_again;
766 } else if (err) {
767 retries = 0;
Arindam Nathf2119df2011-05-05 12:18:57 +0530768 goto try_again;
769 }
770 }
771
David Brownellaf517152007-08-08 09:11:32 -0700772 if (mmc_host_is_spi(host))
773 err = mmc_send_cid(host, cid);
774 else
775 err = mmc_all_send_cid(host, cid);
Michal Miroslaw71578a12010-08-10 18:01:40 -0700776
777 return err;
778}
779
780int 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 Ossman17b04292007-07-22 22:18:46 +0200788 if (err)
Michal Miroslaw71578a12010-08-10 18:01:40 -0700789 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200790
Michal Miroslaw71578a12010-08-10 18:01:40 -0700791 err = mmc_decode_csd(card);
792 if (err)
793 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200794
Michal Miroslaw71578a12010-08-10 18:01:40 -0700795 return 0;
796}
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200797
Lars-Peter Clausen9f6e0bf2015-05-06 20:31:19 +0200798static 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 Clausen9f6e0bf2015-05-06 20:31:19 +0200813 ro = host->ops->get_ro(host);
Lars-Peter Clausen9f6e0bf2015-05-06 20:31:19 +0200814
815 return ro;
816}
817
Michal Miroslaw71578a12010-08-10 18:01:40 -0700818int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
819 bool reinit)
820{
821 int err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200822
Michal Miroslaw71578a12010-08-10 18:01:40 -0700823 if (!reinit) {
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200824 /*
825 * Fetch SCR from card.
826 */
827 err = mmc_app_send_scr(card, card->raw_scr);
Pierre Ossman17b04292007-07-22 22:18:46 +0200828 if (err)
Michal Miroslaw71578a12010-08-10 18:01:40 -0700829 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200830
Pierre Ossmanbd766312007-05-01 16:11:57 +0200831 err = mmc_decode_scr(card);
Michal Miroslaw71578a12010-08-10 18:01:40 -0700832 if (err)
833 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200834
835 /*
Adrian Hunterdfe86cb2010-08-11 14:17:46 -0700836 * 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 Ossman6abaa0c2007-05-01 16:00:02 +0200846 * Fetch switch information from card.
847 */
848 err = mmc_read_switch(card);
Pierre Ossman17b04292007-07-22 22:18:46 +0200849 if (err)
Michal Miroslaw71578a12010-08-10 18:01:40 -0700850 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200851 }
852
853 /*
Wolfgang Muees9d9f25c2009-04-07 14:48:16 +0100854 * 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 Miroslaw71578a12010-08-10 18:01:40 -0700862 return err;
Wolfgang Muees9d9f25c2009-04-07 14:48:16 +0100863 }
864
865 /*
Michal Miroslaw71578a12010-08-10 18:01:40 -0700866 * Check if read-only switch is active.
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200867 */
Michal Miroslaw71578a12010-08-10 18:01:40 -0700868 if (!reinit) {
Lars-Peter Clausen9f6e0bf2015-05-06 20:31:19 +0200869 int ro = mmc_sd_get_ro(host);
Michal Miroslaw71578a12010-08-10 18:01:40 -0700870
871 if (ro < 0) {
Joe Perches66061102014-09-12 14:56:56 -0700872 pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
Michal Miroslaw71578a12010-08-10 18:01:40 -0700873 mmc_hostname(host));
874 } else if (ro > 0) {
875 mmc_card_set_readonly(card);
876 }
877 }
878
879 return 0;
880}
881
882unsigned mmc_sd_get_max_clock(struct mmc_card *card)
883{
884 unsigned max_dtr = (unsigned int)-1;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200885
Seungwon Jeoncdc99172014-04-23 17:07:35 +0900886 if (mmc_card_hs(card)) {
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200887 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 Miroslaw71578a12010-08-10 18:01:40 -0700893 return max_dtr;
894}
895
Michal Miroslaw71578a12010-08-10 18:01:40 -0700896/*
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 */
902static 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 Nathd6d50a12011-05-05 12:18:59 +0530908 u32 rocr = 0;
Michal Miroslaw71578a12010-08-10 18:01:40 -0700909
910 BUG_ON(!host);
911 WARN_ON(!host->claimed);
912
Arindam Nathd6d50a12011-05-05 12:18:59 +0530913 err = mmc_sd_get_cid(host, ocr, cid, &rocr);
Michal Miroslaw71578a12010-08-10 18:01:40 -0700914 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 Hansson69041152013-09-13 11:31:33 +0200930 card->ocr = ocr;
Michal Miroslaw71578a12010-08-10 18:01:40 -0700931 card->type = MMC_TYPE_SD;
932 memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
933 }
934
935 /*
Doug Andersoneac86322014-12-02 15:42:45 -0800936 * 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 Miroslaw71578a12010-08-10 18:01:40 -0700942 * 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 WANG7fca9672013-07-17 14:21:10 +0800947 goto free_card;
Michal Miroslaw71578a12010-08-10 18:01:40 -0700948 }
949
950 if (!oldcard) {
951 err = mmc_sd_get_csd(host, card);
952 if (err)
Wei WANG7fca9672013-07-17 14:21:10 +0800953 goto free_card;
Michal Miroslaw71578a12010-08-10 18:01:40 -0700954
955 mmc_decode_cid(card);
956 }
957
958 /*
Sascha Hauer3d705d12014-08-19 10:45:51 +0200959 * 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 Miroslaw71578a12010-08-10 18:01:40 -0700966 * 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 WANG7fca9672013-07-17 14:21:10 +0800971 goto free_card;
Michal Miroslaw71578a12010-08-10 18:01:40 -0700972 }
973
974 err = mmc_sd_setup_card(host, card, oldcard != NULL);
975 if (err)
976 goto free_card;
977
Arindam Nathd6d50a12011-05-05 12:18:59 +0530978 /* Initialization sequence for UHS-I cards */
979 if (rocr & SD_ROCR_S18A) {
980 err = mmc_sd_init_uhs_card(card);
Pierre Ossman17b04292007-07-22 22:18:46 +0200981 if (err)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200982 goto free_card;
Arindam Nathd6d50a12011-05-05 12:18:59 +0530983 } else {
984 /*
985 * Attempt to change to high-speed (if supported)
986 */
987 err = mmc_sd_switch_hs(card);
988 if (err > 0)
Seungwon Jeoncdc99172014-04-23 17:07:35 +0900989 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
Arindam Nathd6d50a12011-05-05 12:18:59 +0530990 else if (err)
991 goto free_card;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +0200992
Arindam Nathd6d50a12011-05-05 12:18:59 +0530993 /*
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 Ossman6abaa0c2007-05-01 16:00:02 +02001009 }
1010
Michal Miroslaw71578a12010-08-10 18:01:40 -07001011 host->card = card;
Pierre Ossman17b04292007-07-22 22:18:46 +02001012 return 0;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001013
1014free_card:
1015 if (!oldcard)
1016 mmc_remove_card(card);
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001017
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001018 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001019}
1020
1021/*
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001022 * Host is being removed. Free up the current card.
1023 */
1024static 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 Hunterd3049502011-11-28 16:22:00 +02001034 * Card detection - card is alive.
1035 */
1036static int mmc_sd_alive(struct mmc_host *host)
1037{
1038 return mmc_send_status(host->card, NULL);
1039}
1040
1041/*
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001042 * Card detection callback from host.
1043 */
1044static void mmc_sd_detect(struct mmc_host *host)
1045{
1046 int err;
1047
1048 BUG_ON(!host);
1049 BUG_ON(!host->card);
1050
Ulf Hanssone94cfef2013-05-02 14:02:38 +02001051 mmc_get_card(host->card);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001052
1053 /*
1054 * Just check if our card has been removed.
1055 */
Adrian Hunterd3049502011-11-28 16:22:00 +02001056 err = _mmc_detect_card_removed(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001057
Ulf Hanssone94cfef2013-05-02 14:02:38 +02001058 mmc_put_card(host->card);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001059
Pierre Ossman17b04292007-07-22 22:18:46 +02001060 if (err) {
Pierre Ossman4101c162007-05-19 13:39:01 +02001061 mmc_sd_remove(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001062
1063 mmc_claim_host(host);
1064 mmc_detach_bus(host);
Ulf Hansson7f7e4122011-09-21 14:08:13 -04001065 mmc_power_off(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001066 mmc_release_host(host);
1067 }
1068}
1069
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001070static int _mmc_sd_suspend(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001071{
Jaehoon Chung85e727e2012-05-31 20:31:47 +09001072 int err = 0;
1073
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001074 BUG_ON(!host);
1075 BUG_ON(!host->card);
1076
1077 mmc_claim_host(host);
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001078
1079 if (mmc_card_suspended(host->card))
1080 goto out;
1081
David Brownellaf517152007-08-08 09:11:32 -07001082 if (!mmc_host_is_spi(host))
Jaehoon Chung85e727e2012-05-31 20:31:47 +09001083 err = mmc_deselect_cards(host);
Seungwon Jeoncdc99172014-04-23 17:07:35 +09001084
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001085 if (!err) {
Ulf Hansson74590262013-06-10 17:03:38 +02001086 mmc_power_off(host);
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001087 mmc_card_set_suspended(host->card);
1088 }
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001089
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001090out:
1091 mmc_release_host(host);
Jaehoon Chung85e727e2012-05-31 20:31:47 +09001092 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001093}
1094
1095/*
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001096 * Callback for suspend
1097 */
1098static 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 Ossman6abaa0c2007-05-01 16:00:02 +02001112 * This function tries to determine if the same card is still present
1113 * and, if so, restore all state to it.
1114 */
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001115static int _mmc_sd_resume(struct mmc_host *host)
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001116{
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001117 int err = 0;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001118
1119 BUG_ON(!host);
1120 BUG_ON(!host->card);
1121
1122 mmc_claim_host(host);
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001123
1124 if (!mmc_card_suspended(host->card))
1125 goto out;
1126
Ulf Hansson69041152013-09-13 11:31:33 +02001127 mmc_power_up(host, host->card->ocr);
Ulf Hansson69041152013-09-13 11:31:33 +02001128 err = mmc_sd_init_card(host, host->card->ocr, host->card);
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001129 mmc_card_clr_suspended(host->card);
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001130
Ulf Hansson9ec775f2013-10-02 17:37:09 +02001131out:
1132 mmc_release_host(host);
Nicolas Pitre95cdfb72009-09-22 16:45:29 -07001133 return err;
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001134}
1135
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001136/*
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001137 * Callback for resume
1138 */
1139static int mmc_sd_resume(struct mmc_host *host)
1140{
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001141 pm_runtime_enable(&host->card->dev);
Ulf Hanssonc29536e2015-11-05 16:01:32 +01001142 return 0;
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001143}
1144
1145/*
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001146 * Callback for runtime_suspend.
1147 */
1148static 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 Hansson0cb403a2013-10-10 14:20:05 +02001155 err = _mmc_sd_suspend(host);
Ulf Hansson0cc81a82013-10-03 11:24:44 +02001156 if (err)
Masanari Iidaf42cf8d2015-02-24 23:11:26 +09001157 pr_err("%s: error %d doing aggressive suspend\n",
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001158 mmc_hostname(host), err);
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001159
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001160 return err;
1161}
1162
1163/*
1164 * Callback for runtime_resume.
1165 */
1166static int mmc_sd_runtime_resume(struct mmc_host *host)
1167{
1168 int err;
1169
Ulf Hansson0cb403a2013-10-10 14:20:05 +02001170 err = _mmc_sd_resume(host);
Adrian Hunter520322d2015-12-14 15:51:27 +02001171 if (err && err != -ENOMEDIUM)
Ulf Hanssonc29536e2015-11-05 16:01:32 +01001172 pr_err("%s: error %d doing runtime resume\n",
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001173 mmc_hostname(host), err);
1174
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001175 return 0;
1176}
1177
Johan Rudholmdc0ecfe2015-01-12 15:38:06 +01001178static int mmc_sd_reset(struct mmc_host *host)
1179{
1180 mmc_power_cycle(host, host->card->ocr);
Ulf Hansson3056c492015-06-01 11:14:58 +02001181 return mmc_sd_init_card(host, host->card->ocr, host->card);
Johan Rudholmdc0ecfe2015-01-12 15:38:06 +01001182}
1183
Adrian Hunter9feae242009-09-22 16:44:32 -07001184static const struct mmc_bus_ops mmc_sd_ops = {
1185 .remove = mmc_sd_remove,
1186 .detect = mmc_sd_detect,
Ulf Hanssonc4d770d2013-05-02 14:02:39 +02001187 .runtime_suspend = mmc_sd_runtime_suspend,
1188 .runtime_resume = mmc_sd_runtime_resume,
Adrian Hunter9feae242009-09-22 16:44:32 -07001189 .suspend = mmc_sd_suspend,
1190 .resume = mmc_sd_resume,
Adrian Hunterd3049502011-11-28 16:22:00 +02001191 .alive = mmc_sd_alive,
Ulf Hansson5992e782013-06-10 17:03:42 +02001192 .shutdown = mmc_sd_suspend,
Johan Rudholmdc0ecfe2015-01-12 15:38:06 +01001193 .reset = mmc_sd_reset,
Adrian Hunter9feae242009-09-22 16:44:32 -07001194};
1195
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001196/*
1197 * Starting point for SD card init.
1198 */
Andy Ross807e8e42011-01-03 10:36:56 -08001199int mmc_attach_sd(struct mmc_host *host)
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001200{
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001201 int err;
Ulf Hansson69041152013-09-13 11:31:33 +02001202 u32 ocr, rocr;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001203
1204 BUG_ON(!host);
Pierre Ossmand84075c82007-08-09 13:23:56 +02001205 WARN_ON(!host->claimed);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001206
Andy Ross807e8e42011-01-03 10:36:56 -08001207 err = mmc_send_app_op_cond(host, 0, &ocr);
1208 if (err)
1209 return err;
1210
Ulf Hansson2501c912013-10-30 01:00:18 +01001211 mmc_attach_bus(host, &mmc_sd_ops);
Takashi Iwai8f230f42010-12-08 10:04:30 +01001212 if (host->ocr_avail_sd)
1213 host->ocr_avail = host->ocr_avail_sd;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001214
Philip Langdale55556da2007-03-16 19:39:00 -07001215 /*
David Brownellaf517152007-08-08 09:11:32 -07001216 * 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 Hansson69041152013-09-13 11:31:33 +02001226 rocr = mmc_select_voltage(host, ocr);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001227
1228 /*
1229 * Can we support the voltage(s) of the card(s)?
1230 */
Ulf Hansson69041152013-09-13 11:31:33 +02001231 if (!rocr) {
Pierre Ossman109b5be2007-07-23 00:12:10 +02001232 err = -EINVAL;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001233 goto err;
Pierre Ossman109b5be2007-07-23 00:12:10 +02001234 }
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001235
1236 /*
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001237 * Detect and init the card.
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001238 */
Ulf Hansson69041152013-09-13 11:31:33 +02001239 err = mmc_sd_init_card(host, rocr, NULL);
Pierre Ossman17b04292007-07-22 22:18:46 +02001240 if (err)
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001241 goto err;
1242
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001243 mmc_release_host(host);
Pierre Ossman4101c162007-05-19 13:39:01 +02001244 err = mmc_add_card(host->card);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001245 if (err)
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001246 goto remove_card;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001247
Sergei Shtylyov2860d062015-10-14 23:53:03 +03001248 mmc_claim_host(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001249 return 0;
1250
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001251remove_card:
Pierre Ossman6abaa0c2007-05-01 16:00:02 +02001252 mmc_remove_card(host->card);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001253 host->card = NULL;
Pierre Ossman2986d0b2007-07-22 17:52:06 +02001254 mmc_claim_host(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001255err:
1256 mmc_detach_bus(host);
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001257
Girish K Sa3c76eb2011-10-11 11:44:09 +05301258 pr_err("%s: error %d whilst initialising SD card\n",
Pierre Ossman109b5be2007-07-23 00:12:10 +02001259 mmc_hostname(host), err);
1260
Pierre Ossmanadf66a02007-07-22 23:08:30 +02001261 return err;
Pierre Ossman7ea239d2006-12-31 00:11:32 +01001262}