Commit | Line | Data |
---|---|---|
7ea239d9 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/core/sd.c |
7ea239d9 PO |
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> | |
9288cac0 | 14 | #include <linux/sizes.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
0205a904 | 16 | #include <linux/stat.h> |
0cb403a2 | 17 | #include <linux/pm_runtime.h> |
7ea239d9 PO |
18 | |
19 | #include <linux/mmc/host.h> | |
20 | #include <linux/mmc/card.h> | |
21 | #include <linux/mmc/mmc.h> | |
3373c0ae | 22 | #include <linux/mmc/sd.h> |
7ea239d9 PO |
23 | |
24 | #include "core.h" | |
4facdde1 | 25 | #include "card.h" |
5857b29b | 26 | #include "host.h" |
4101c16a | 27 | #include "bus.h" |
7ea239d9 | 28 | #include "mmc_ops.h" |
ce101496 | 29 | #include "sd.h" |
7ea239d9 PO |
30 | #include "sd_ops.h" |
31 | ||
7ea239d9 PO |
32 | static const unsigned int tran_exp[] = { |
33 | 10000, 100000, 1000000, 10000000, | |
34 | 0, 0, 0, 0 | |
35 | }; | |
36 | ||
37 | static const unsigned char tran_mant[] = { | |
38 | 0, 10, 12, 13, 15, 20, 25, 30, | |
39 | 35, 40, 45, 50, 55, 60, 70, 80, | |
40 | }; | |
41 | ||
4406ae21 | 42 | static const unsigned int taac_exp[] = { |
7ea239d9 PO |
43 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, |
44 | }; | |
45 | ||
4406ae21 | 46 | static const unsigned int taac_mant[] = { |
7ea239d9 PO |
47 | 0, 10, 12, 13, 15, 20, 25, 30, |
48 | 35, 40, 45, 50, 55, 60, 70, 80, | |
49 | }; | |
50 | ||
9288cac0 WS |
51 | static const unsigned int sd_au_size[] = { |
52 | 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, | |
53 | SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, | |
54 | SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, | |
55 | SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, | |
56 | }; | |
57 | ||
7ea239d9 PO |
58 | #define UNSTUFF_BITS(resp,start,size) \ |
59 | ({ \ | |
60 | const int __size = size; \ | |
61 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
62 | const int __off = 3 - ((start) / 32); \ | |
63 | const int __shft = (start) & 31; \ | |
64 | u32 __res; \ | |
65 | \ | |
66 | __res = resp[__off] >> __shft; \ | |
67 | if (__size + __shft > 32) \ | |
68 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
69 | __res & __mask; \ | |
70 | }) | |
71 | ||
72 | /* | |
73 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
74 | */ | |
71578a1e | 75 | void mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
76 | { |
77 | u32 *resp = card->raw_cid; | |
78 | ||
7ea239d9 PO |
79 | /* |
80 | * SD doesn't currently have a version field so we will | |
81 | * have to assume we can parse this. | |
82 | */ | |
83 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
84 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
85 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
86 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
87 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
88 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
89 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
90 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); | |
91 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); | |
92 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); | |
93 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); | |
94 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); | |
95 | ||
96 | card->cid.year += 2000; /* SD cards year offset */ | |
97 | } | |
98 | ||
99 | /* | |
100 | * Given a 128-bit response, decode to our card CSD structure. | |
101 | */ | |
bd766312 | 102 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
103 | { |
104 | struct mmc_csd *csd = &card->csd; | |
105 | unsigned int e, m, csd_struct; | |
106 | u32 *resp = card->raw_csd; | |
107 | ||
108 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
109 | ||
110 | switch (csd_struct) { | |
111 | case 0: | |
112 | m = UNSTUFF_BITS(resp, 115, 4); | |
113 | e = UNSTUFF_BITS(resp, 112, 3); | |
4406ae21 SL |
114 | csd->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; |
115 | csd->taac_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
7ea239d9 PO |
116 | |
117 | m = UNSTUFF_BITS(resp, 99, 4); | |
118 | e = UNSTUFF_BITS(resp, 96, 3); | |
119 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
120 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
121 | ||
122 | e = UNSTUFF_BITS(resp, 47, 3); | |
123 | m = UNSTUFF_BITS(resp, 62, 12); | |
124 | csd->capacity = (1 + m) << (e + 2); | |
125 | ||
126 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
127 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
128 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
129 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
3d705d14 | 130 | csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); |
7ea239d9 PO |
131 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); |
132 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
133 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
dfe86cba AH |
134 | |
135 | if (UNSTUFF_BITS(resp, 46, 1)) { | |
136 | csd->erase_size = 1; | |
137 | } else if (csd->write_blkbits >= 9) { | |
138 | csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; | |
139 | csd->erase_size <<= csd->write_blkbits - 9; | |
140 | } | |
7ea239d9 PO |
141 | break; |
142 | case 1: | |
143 | /* | |
3a303511 | 144 | * This is a block-addressed SDHC or SDXC card. Most |
7ea239d9 PO |
145 | * interesting fields are unused and have fixed |
146 | * values. To avoid getting tripped by buggy cards, | |
147 | * we assume those fixed values ourselves. | |
148 | */ | |
149 | mmc_card_set_blockaddr(card); | |
150 | ||
4406ae21 SL |
151 | csd->taac_ns = 0; /* Unused */ |
152 | csd->taac_clks = 0; /* Unused */ | |
7ea239d9 PO |
153 | |
154 | m = UNSTUFF_BITS(resp, 99, 4); | |
155 | e = UNSTUFF_BITS(resp, 96, 3); | |
156 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
157 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
3a303511 AN |
158 | csd->c_size = UNSTUFF_BITS(resp, 48, 22); |
159 | ||
160 | /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ | |
161 | if (csd->c_size >= 0xFFFF) | |
162 | mmc_card_set_ext_capacity(card); | |
7ea239d9 PO |
163 | |
164 | m = UNSTUFF_BITS(resp, 48, 22); | |
165 | csd->capacity = (1 + m) << 10; | |
166 | ||
167 | csd->read_blkbits = 9; | |
168 | csd->read_partial = 0; | |
169 | csd->write_misalign = 0; | |
170 | csd->read_misalign = 0; | |
171 | csd->r2w_factor = 4; /* Unused */ | |
172 | csd->write_blkbits = 9; | |
173 | csd->write_partial = 0; | |
dfe86cba | 174 | csd->erase_size = 1; |
7ea239d9 PO |
175 | break; |
176 | default: | |
a3c76eb9 | 177 | pr_err("%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 178 | mmc_hostname(card->host), csd_struct); |
bd766312 | 179 | return -EINVAL; |
7ea239d9 | 180 | } |
bd766312 | 181 | |
dfe86cba AH |
182 | card->erase_size = csd->erase_size; |
183 | ||
bd766312 | 184 | return 0; |
7ea239d9 PO |
185 | } |
186 | ||
187 | /* | |
188 | * Given a 64-bit response, decode to our card SCR structure. | |
189 | */ | |
bd766312 | 190 | static int mmc_decode_scr(struct mmc_card *card) |
7ea239d9 PO |
191 | { |
192 | struct sd_scr *scr = &card->scr; | |
193 | unsigned int scr_struct; | |
194 | u32 resp[4]; | |
195 | ||
7ea239d9 PO |
196 | resp[3] = card->raw_scr[1]; |
197 | resp[2] = card->raw_scr[0]; | |
198 | ||
199 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
200 | if (scr_struct != 0) { | |
a3c76eb9 | 201 | pr_err("%s: unrecognised SCR structure version %d\n", |
7ea239d9 | 202 | mmc_hostname(card->host), scr_struct); |
bd766312 | 203 | return -EINVAL; |
7ea239d9 PO |
204 | } |
205 | ||
206 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
207 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
013909c4 AN |
208 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
209 | /* Check if Physical Layer Spec v3.0 is supported */ | |
210 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); | |
bd766312 | 211 | |
68539e2b AA |
212 | if (scr->sda_spec3) { |
213 | scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1); | |
214 | scr->sda_specx = UNSTUFF_BITS(resp, 38, 4); | |
215 | } | |
216 | ||
dfe86cba AH |
217 | if (UNSTUFF_BITS(resp, 55, 1)) |
218 | card->erased_byte = 0xFF; | |
219 | else | |
220 | card->erased_byte = 0x0; | |
221 | ||
f0d89972 AW |
222 | if (scr->sda_spec3) |
223 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); | |
bd766312 | 224 | return 0; |
7ea239d9 PO |
225 | } |
226 | ||
dfe86cba AH |
227 | /* |
228 | * Fetch and process SD Status register. | |
229 | */ | |
230 | static int mmc_read_ssr(struct mmc_card *card) | |
231 | { | |
232 | unsigned int au, es, et, eo; | |
06c9ccb7 | 233 | __be32 *raw_ssr; |
bc47e2f6 AA |
234 | u32 resp[4] = {}; |
235 | u8 discard_support; | |
5275a652 | 236 | int i; |
dfe86cba AH |
237 | |
238 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
6606110d JP |
239 | pr_warn("%s: card lacks mandatory SD Status function\n", |
240 | mmc_hostname(card->host)); | |
dfe86cba AH |
241 | return 0; |
242 | } | |
243 | ||
e85baa88 PB |
244 | raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL); |
245 | if (!raw_ssr) | |
246 | return -ENOMEM; | |
247 | ||
248 | if (mmc_app_sd_status(card, raw_ssr)) { | |
6606110d JP |
249 | pr_warn("%s: problem reading SD Status register\n", |
250 | mmc_hostname(card->host)); | |
e85baa88 | 251 | kfree(raw_ssr); |
5275a652 | 252 | return 0; |
dfe86cba AH |
253 | } |
254 | ||
255 | for (i = 0; i < 16; i++) | |
e85baa88 PB |
256 | card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]); |
257 | ||
258 | kfree(raw_ssr); | |
dfe86cba AH |
259 | |
260 | /* | |
261 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
262 | * bitfield positions accordingly. | |
263 | */ | |
5275a652 | 264 | au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4); |
9288cac0 WS |
265 | if (au) { |
266 | if (au <= 9 || card->scr.sda_spec3) { | |
267 | card->ssr.au = sd_au_size[au]; | |
5275a652 UY |
268 | es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16); |
269 | et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6); | |
9288cac0 | 270 | if (es && et) { |
5275a652 | 271 | eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2); |
9288cac0 WS |
272 | card->ssr.erase_timeout = (et * 1000) / es; |
273 | card->ssr.erase_offset = eo * 1000; | |
274 | } | |
275 | } else { | |
6606110d JP |
276 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
277 | mmc_hostname(card->host)); | |
dfe86cba | 278 | } |
dfe86cba | 279 | } |
5275a652 | 280 | |
bc47e2f6 AA |
281 | /* |
282 | * starting SD5.1 discard is supported if DISCARD_SUPPORT (b313) is set | |
283 | */ | |
284 | resp[3] = card->raw_ssr[6]; | |
285 | discard_support = UNSTUFF_BITS(resp, 313 - 288, 1); | |
286 | card->erase_arg = (card->scr.sda_specx && discard_support) ? | |
287 | SD_DISCARD_ARG : SD_ERASE_ARG; | |
01904ff7 | 288 | |
5275a652 | 289 | return 0; |
dfe86cba AH |
290 | } |
291 | ||
7ea239d9 | 292 | /* |
1addfcdb | 293 | * Fetches and decodes switch information |
7ea239d9 | 294 | */ |
1addfcdb | 295 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
296 | { |
297 | int err; | |
298 | u8 *status; | |
299 | ||
3373c0ae | 300 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 301 | return 0; |
3373c0ae PO |
302 | |
303 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
6606110d | 304 | pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", |
3373c0ae | 305 | mmc_hostname(card->host)); |
17b0429d | 306 | return 0; |
3373c0ae PO |
307 | } |
308 | ||
7ea239d9 | 309 | status = kmalloc(64, GFP_KERNEL); |
e1df7ae3 | 310 | if (!status) |
17b0429d | 311 | return -ENOMEM; |
7ea239d9 | 312 | |
a39ca6ae AL |
313 | /* |
314 | * Find out the card's support bits with a mode 0 operation. | |
315 | * The argument does not matter, as the support bits do not | |
316 | * change with the arguments. | |
317 | */ | |
318 | err = mmc_sd_switch(card, 0, 0, 0, status); | |
17b0429d | 319 | if (err) { |
013909c4 AN |
320 | /* |
321 | * If the host or the card can't do the switch, | |
322 | * fail more gracefully. | |
323 | */ | |
324 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
325 | goto out; |
326 | ||
6606110d | 327 | pr_warn("%s: problem reading Bus Speed modes\n", |
3373c0ae | 328 | mmc_hostname(card->host)); |
17b0429d | 329 | err = 0; |
adf66a0d | 330 | |
7ea239d9 PO |
331 | goto out; |
332 | } | |
333 | ||
fffe5d5a QL |
334 | if (status[13] & SD_MODE_HIGH_SPEED) |
335 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; | |
f2815f68 | 336 | |
013909c4 AN |
337 | if (card->scr.sda_spec3) { |
338 | card->sw_caps.sd3_bus_mode = status[13]; | |
a39ca6ae | 339 | /* Driver Strengths supported by the card */ |
013909c4 | 340 | card->sw_caps.sd3_drv_type = status[9]; |
d9812780 | 341 | card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; |
013909c4 | 342 | } |
7ea239d9 | 343 | |
1addfcdb PO |
344 | out: |
345 | kfree(status); | |
346 | ||
347 | return err; | |
348 | } | |
349 | ||
350 | /* | |
351 | * Test if the card supports high-speed mode and, if so, switch to it. | |
352 | */ | |
71578a1e | 353 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
354 | { |
355 | int err; | |
356 | u8 *status; | |
357 | ||
3373c0ae | 358 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 359 | return 0; |
3373c0ae PO |
360 | |
361 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 362 | return 0; |
3373c0ae | 363 | |
1addfcdb | 364 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 365 | return 0; |
1addfcdb PO |
366 | |
367 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 368 | return 0; |
1addfcdb | 369 | |
1addfcdb | 370 | status = kmalloc(64, GFP_KERNEL); |
e1df7ae3 | 371 | if (!status) |
17b0429d | 372 | return -ENOMEM; |
1addfcdb | 373 | |
7ea239d9 | 374 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 375 | if (err) |
7ea239d9 PO |
376 | goto out; |
377 | ||
378 | if ((status[16] & 0xF) != 1) { | |
6606110d | 379 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 380 | mmc_hostname(card->host)); |
71578a1e | 381 | err = 0; |
7ea239d9 | 382 | } else { |
71578a1e | 383 | err = 1; |
7ea239d9 PO |
384 | } |
385 | ||
386 | out: | |
387 | kfree(status); | |
388 | ||
389 | return err; | |
390 | } | |
391 | ||
d6d50a15 AN |
392 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
393 | { | |
fa021cef | 394 | int card_drv_type, drive_strength, drv_type; |
d6d50a15 AN |
395 | int err; |
396 | ||
3853a042 AH |
397 | card->drive_strength = 0; |
398 | ||
fa021cef | 399 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
ca8e99b3 | 400 | |
e23350b3 AH |
401 | drive_strength = mmc_select_drive_strength(card, |
402 | card->sw_caps.uhs_max_dtr, | |
403 | card_drv_type, &drv_type); | |
d6d50a15 | 404 | |
b4f30a17 AH |
405 | if (drive_strength) { |
406 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); | |
407 | if (err) | |
408 | return err; | |
409 | if ((status[15] & 0xF) != drive_strength) { | |
410 | pr_warn("%s: Problem setting drive strength!\n", | |
411 | mmc_hostname(card->host)); | |
412 | return 0; | |
413 | } | |
3853a042 | 414 | card->drive_strength = drive_strength; |
d6d50a15 AN |
415 | } |
416 | ||
b4f30a17 AH |
417 | if (drv_type) |
418 | mmc_set_driver_type(card->host, drv_type); | |
d6d50a15 AN |
419 | |
420 | return 0; | |
421 | } | |
422 | ||
93c712f9 | 423 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 424 | { |
49c468fc AN |
425 | /* |
426 | * If the host doesn't support any of the UHS-I modes, fallback on | |
427 | * default speed. | |
428 | */ | |
3f8a7fab | 429 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
430 | card->sd_bus_speed = 0; |
431 | return; | |
432 | } | |
49c468fc AN |
433 | |
434 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
435 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 436 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
437 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
438 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 439 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
440 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
441 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
442 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 443 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
444 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
445 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
446 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 447 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
448 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
449 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
450 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
451 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
452 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
453 | } | |
454 | } | |
455 | ||
456 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
457 | { | |
458 | int err; | |
459 | unsigned int timing = 0; | |
460 | ||
461 | switch (card->sd_bus_speed) { | |
462 | case UHS_SDR104_BUS_SPEED: | |
463 | timing = MMC_TIMING_UHS_SDR104; | |
464 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
465 | break; | |
466 | case UHS_DDR50_BUS_SPEED: | |
467 | timing = MMC_TIMING_UHS_DDR50; | |
468 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
469 | break; | |
470 | case UHS_SDR50_BUS_SPEED: | |
471 | timing = MMC_TIMING_UHS_SDR50; | |
472 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
473 | break; | |
474 | case UHS_SDR25_BUS_SPEED: | |
475 | timing = MMC_TIMING_UHS_SDR25; | |
476 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
477 | break; | |
478 | case UHS_SDR12_BUS_SPEED: | |
479 | timing = MMC_TIMING_UHS_SDR12; | |
480 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
481 | break; | |
482 | default: | |
483 | return 0; | |
49c468fc AN |
484 | } |
485 | ||
93c712f9 | 486 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
487 | if (err) |
488 | return err; | |
489 | ||
93c712f9 | 490 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 491 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
492 | mmc_hostname(card->host)); |
493 | else { | |
494 | mmc_set_timing(card->host, timing); | |
495 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
496 | } | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
55c4665e AL |
501 | /* Get host's max current setting at its current voltage */ |
502 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
503 | { | |
504 | u32 voltage, max_current; | |
505 | ||
506 | voltage = 1 << host->ios.vdd; | |
507 | switch (voltage) { | |
508 | case MMC_VDD_165_195: | |
509 | max_current = host->max_current_180; | |
510 | break; | |
511 | case MMC_VDD_29_30: | |
512 | case MMC_VDD_30_31: | |
513 | max_current = host->max_current_300; | |
514 | break; | |
515 | case MMC_VDD_32_33: | |
516 | case MMC_VDD_33_34: | |
517 | max_current = host->max_current_330; | |
518 | break; | |
519 | default: | |
520 | max_current = 0; | |
521 | } | |
522 | ||
523 | return max_current; | |
524 | } | |
525 | ||
5371c927 AN |
526 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
527 | { | |
0aa67700 | 528 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 529 | int err; |
55c4665e | 530 | u32 max_current; |
5371c927 AN |
531 | |
532 | /* | |
533 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
534 | * bus speed modes. For other bus speed modes, we do not change the |
535 | * current limit. | |
55c4665e AL |
536 | */ |
537 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
538 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
539 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
540 | return 0; | |
541 | ||
542 | /* | |
543 | * Host has different current capabilities when operating at | |
544 | * different voltages, so find out its max current first. | |
545 | */ | |
546 | max_current = sd_get_host_max_current(card->host); | |
547 | ||
548 | /* | |
a39ca6ae AL |
549 | * We only check host's capability here, if we set a limit that is |
550 | * higher than the card's maximum current, the card will be using its | |
551 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
552 | * when we set current limit to 200ma, the card will draw 200ma, and | |
553 | * when we set current limit to 400/600/800ma, the card will draw its | |
554 | * maximum 300ma from the host. | |
d9812780 RK |
555 | * |
556 | * The above is incorrect: if we try to set a current limit that is | |
557 | * not supported by the card, the card can rightfully error out the | |
558 | * attempt, and remain at the default current limit. This results | |
559 | * in a 300mA card being limited to 200mA even though the host | |
560 | * supports 800mA. Failures seen with SanDisk 8GB UHS cards with | |
561 | * an iMX6 host. --rmk | |
5371c927 | 562 | */ |
d9812780 RK |
563 | if (max_current >= 800 && |
564 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
55c4665e | 565 | current_limit = SD_SET_CURRENT_LIMIT_800; |
d9812780 RK |
566 | else if (max_current >= 600 && |
567 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
55c4665e | 568 | current_limit = SD_SET_CURRENT_LIMIT_600; |
d9812780 RK |
569 | else if (max_current >= 400 && |
570 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
55c4665e | 571 | current_limit = SD_SET_CURRENT_LIMIT_400; |
d9812780 RK |
572 | else if (max_current >= 200 && |
573 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
55c4665e | 574 | current_limit = SD_SET_CURRENT_LIMIT_200; |
5371c927 | 575 | |
0aa67700 PR |
576 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
577 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
578 | if (err) | |
579 | return err; | |
5371c927 | 580 | |
0aa67700 | 581 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 582 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 583 | mmc_hostname(card->host)); |
5371c927 | 584 | |
0aa67700 | 585 | } |
a39ca6ae | 586 | |
5371c927 AN |
587 | return 0; |
588 | } | |
589 | ||
d6d50a15 AN |
590 | /* |
591 | * UHS-I specific initialization procedure | |
592 | */ | |
593 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
594 | { | |
595 | int err; | |
596 | u8 *status; | |
597 | ||
d6d50a15 AN |
598 | if (!(card->csd.cmdclass & CCC_SWITCH)) |
599 | return 0; | |
600 | ||
601 | status = kmalloc(64, GFP_KERNEL); | |
e1df7ae3 | 602 | if (!status) |
d6d50a15 | 603 | return -ENOMEM; |
d6d50a15 AN |
604 | |
605 | /* Set 4-bit bus width */ | |
d6743a8a SL |
606 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
607 | if (err) | |
608 | goto out; | |
d6d50a15 | 609 | |
d6743a8a | 610 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); |
d6d50a15 | 611 | |
93c712f9 SJ |
612 | /* |
613 | * Select the bus speed mode depending on host | |
614 | * and card capability. | |
615 | */ | |
616 | sd_update_bus_speed_mode(card); | |
617 | ||
d6d50a15 AN |
618 | /* Set the driver strength for the card */ |
619 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
620 | if (err) |
621 | goto out; | |
622 | ||
93c712f9 SJ |
623 | /* Set current limit for the card */ |
624 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
625 | if (err) |
626 | goto out; | |
627 | ||
93c712f9 SJ |
628 | /* Set bus speed mode of the card */ |
629 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
630 | if (err) |
631 | goto out; | |
632 | ||
810e08ee FS |
633 | /* |
634 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
635 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
636 | */ | |
63e415c6 | 637 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
638 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
639 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || | |
640 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { | |
63e415c6 | 641 | err = mmc_execute_tuning(card); |
4324f6de WY |
642 | |
643 | /* | |
644 | * As SD Specifications Part1 Physical Layer Specification | |
645 | * Version 3.01 says, CMD19 tuning is available for unlocked | |
646 | * cards in transfer state of 1.8V signaling mode. The small | |
647 | * difference between v3.00 and 3.01 spec means that CMD19 | |
648 | * tuning is also available for DDR50 mode. | |
649 | */ | |
e10c3219 | 650 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
4324f6de WY |
651 | pr_warn("%s: ddr50 tuning failed\n", |
652 | mmc_hostname(card->host)); | |
653 | err = 0; | |
654 | } | |
655 | } | |
656 | ||
d6d50a15 AN |
657 | out: |
658 | kfree(status); | |
659 | ||
660 | return err; | |
661 | } | |
662 | ||
51ec92e2 PO |
663 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
664 | card->raw_cid[2], card->raw_cid[3]); | |
665 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
666 | card->raw_csd[2], card->raw_csd[3]); | |
667 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
5275a652 UY |
668 | MMC_DEV_ATTR(ssr, |
669 | "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
670 | card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], | |
671 | card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], | |
672 | card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], | |
673 | card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], | |
674 | card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], | |
675 | card->raw_ssr[15]); | |
51ec92e2 | 676 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
dfe86cba AH |
677 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
678 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
679 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
680 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
681 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
682 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
683 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
684 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
c892b0d8 | 685 | MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); |
974e85e9 | 686 | MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); |
51ec92e2 PO |
687 | |
688 | ||
6825a606 BP |
689 | static ssize_t mmc_dsr_show(struct device *dev, |
690 | struct device_attribute *attr, | |
691 | char *buf) | |
692 | { | |
693 | struct mmc_card *card = mmc_dev_to_card(dev); | |
694 | struct mmc_host *host = card->host; | |
695 | ||
696 | if (card->csd.dsr_imp && host->dsr_req) | |
697 | return sprintf(buf, "0x%x\n", host->dsr); | |
698 | else | |
699 | /* return default DSR value */ | |
700 | return sprintf(buf, "0x%x\n", 0x404); | |
701 | } | |
702 | ||
703 | static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); | |
704 | ||
51ec92e2 PO |
705 | static struct attribute *sd_std_attrs[] = { |
706 | &dev_attr_cid.attr, | |
707 | &dev_attr_csd.attr, | |
708 | &dev_attr_scr.attr, | |
5275a652 | 709 | &dev_attr_ssr.attr, |
51ec92e2 | 710 | &dev_attr_date.attr, |
dfe86cba AH |
711 | &dev_attr_erase_size.attr, |
712 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
713 | &dev_attr_fwrev.attr, |
714 | &dev_attr_hwrev.attr, | |
715 | &dev_attr_manfid.attr, | |
716 | &dev_attr_name.attr, | |
717 | &dev_attr_oemid.attr, | |
718 | &dev_attr_serial.attr, | |
5fb06af7 | 719 | &dev_attr_ocr.attr, |
974e85e9 | 720 | &dev_attr_rca.attr, |
6825a606 | 721 | &dev_attr_dsr.attr, |
51ec92e2 PO |
722 | NULL, |
723 | }; | |
d1e58212 | 724 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 725 | |
71578a1e | 726 | struct device_type sd_type = { |
d1e58212 | 727 | .groups = sd_std_groups, |
51ec92e2 PO |
728 | }; |
729 | ||
7ea239d9 | 730 | /* |
71578a1e | 731 | * Fetch CID from card. |
7ea239d9 | 732 | */ |
d6d50a15 | 733 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 734 | { |
7ea239d9 | 735 | int err; |
55c4665e | 736 | u32 max_current; |
0797e5f1 | 737 | int retries = 10; |
69041150 | 738 | u32 pocr = ocr; |
0797e5f1 JR |
739 | |
740 | try_again: | |
741 | if (!retries) { | |
742 | ocr &= ~SD_OCR_S18R; | |
6606110d | 743 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 744 | } |
7ea239d9 | 745 | |
7ea239d9 PO |
746 | /* |
747 | * Since we're changing the OCR value, we seem to | |
748 | * need to tell some cards to go back to the idle | |
749 | * state. We wait 1ms to give cards time to | |
750 | * respond. | |
751 | */ | |
752 | mmc_go_idle(host); | |
753 | ||
754 | /* | |
755 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
756 | * compliant card and we should set bit 30 | |
757 | * of the ocr to indicate that we can handle | |
758 | * block-addressed SDHC cards. | |
759 | */ | |
6abaa0c9 | 760 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 761 | if (!err) |
f2119df6 | 762 | ocr |= SD_OCR_CCS; |
7ea239d9 | 763 | |
f2119df6 AN |
764 | /* |
765 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
766 | * to switch to 1.8V signaling level. If the card has failed |
767 | * repeatedly to switch however, skip this. | |
f2119df6 | 768 | */ |
0797e5f1 | 769 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
770 | ocr |= SD_OCR_S18R; |
771 | ||
55c4665e AL |
772 | /* |
773 | * If the host can supply more than 150mA at current voltage, | |
774 | * XPC should be set to 1. | |
775 | */ | |
776 | max_current = sd_get_host_max_current(host); | |
777 | if (max_current > 150) | |
f2119df6 AN |
778 | ocr |= SD_OCR_XPC; |
779 | ||
d6d50a15 | 780 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 781 | if (err) |
71578a1e | 782 | return err; |
7ea239d9 | 783 | |
f2119df6 AN |
784 | /* |
785 | * In case CCS and S18A in the response is set, start Signal Voltage | |
786 | * Switch procedure. SPI mode doesn't support CMD11. | |
787 | */ | |
d6d50a15 AN |
788 | if (!mmc_host_is_spi(host) && rocr && |
789 | ((*rocr & 0x41000000) == 0x41000000)) { | |
2ed573b6 | 790 | err = mmc_set_uhs_voltage(host, pocr); |
0797e5f1 JR |
791 | if (err == -EAGAIN) { |
792 | retries--; | |
793 | goto try_again; | |
794 | } else if (err) { | |
795 | retries = 0; | |
f2119df6 AN |
796 | goto try_again; |
797 | } | |
798 | } | |
799 | ||
a1473732 | 800 | err = mmc_send_cid(host, cid); |
71578a1e MM |
801 | return err; |
802 | } | |
803 | ||
804 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
805 | { | |
806 | int err; | |
807 | ||
808 | /* | |
809 | * Fetch CSD from card. | |
810 | */ | |
811 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 812 | if (err) |
71578a1e | 813 | return err; |
7ea239d9 | 814 | |
71578a1e MM |
815 | err = mmc_decode_csd(card); |
816 | if (err) | |
817 | return err; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
9f6e0bff LPC |
822 | static int mmc_sd_get_ro(struct mmc_host *host) |
823 | { | |
824 | int ro; | |
825 | ||
826 | /* | |
827 | * Some systems don't feature a write-protect pin and don't need one. | |
828 | * E.g. because they only have micro-SD card slot. For those systems | |
829 | * assume that the SD card is always read-write. | |
830 | */ | |
831 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) | |
832 | return 0; | |
833 | ||
834 | if (!host->ops->get_ro) | |
835 | return -1; | |
836 | ||
9f6e0bff | 837 | ro = host->ops->get_ro(host); |
9f6e0bff LPC |
838 | |
839 | return ro; | |
840 | } | |
841 | ||
71578a1e MM |
842 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
843 | bool reinit) | |
844 | { | |
845 | int err; | |
846 | ||
847 | if (!reinit) { | |
848 | /* | |
849 | * Fetch SCR from card. | |
850 | */ | |
06c9ccb7 | 851 | err = mmc_app_send_scr(card); |
71578a1e MM |
852 | if (err) |
853 | return err; | |
854 | ||
855 | err = mmc_decode_scr(card); | |
856 | if (err) | |
857 | return err; | |
858 | ||
dfe86cba AH |
859 | /* |
860 | * Fetch and process SD Status register. | |
861 | */ | |
862 | err = mmc_read_ssr(card); | |
863 | if (err) | |
864 | return err; | |
865 | ||
866 | /* Erase init depends on CSD and SSR */ | |
867 | mmc_init_erase(card); | |
868 | ||
71578a1e MM |
869 | /* |
870 | * Fetch switch information from card. | |
871 | */ | |
872 | err = mmc_read_switch(card); | |
873 | if (err) | |
874 | return err; | |
875 | } | |
876 | ||
877 | /* | |
878 | * For SPI, enable CRC as appropriate. | |
879 | * This CRC enable is located AFTER the reading of the | |
880 | * card registers because some SDHC cards are not able | |
881 | * to provide valid CRCs for non-512-byte blocks. | |
882 | */ | |
883 | if (mmc_host_is_spi(host)) { | |
884 | err = mmc_spi_set_crc(host, use_spi_crc); | |
885 | if (err) | |
886 | return err; | |
887 | } | |
888 | ||
889 | /* | |
890 | * Check if read-only switch is active. | |
891 | */ | |
892 | if (!reinit) { | |
9f6e0bff | 893 | int ro = mmc_sd_get_ro(host); |
71578a1e MM |
894 | |
895 | if (ro < 0) { | |
6606110d | 896 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
897 | mmc_hostname(host)); |
898 | } else if (ro > 0) { | |
899 | mmc_card_set_readonly(card); | |
adf66a0d | 900 | } |
71578a1e MM |
901 | } |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
907 | { | |
908 | unsigned max_dtr = (unsigned int)-1; | |
909 | ||
cdc99179 | 910 | if (mmc_card_hs(card)) { |
71578a1e MM |
911 | if (max_dtr > card->sw_caps.hs_max_dtr) |
912 | max_dtr = card->sw_caps.hs_max_dtr; | |
913 | } else if (max_dtr > card->csd.max_dtr) { | |
914 | max_dtr = card->csd.max_dtr; | |
915 | } | |
916 | ||
917 | return max_dtr; | |
918 | } | |
919 | ||
6a11fc47 AH |
920 | static bool mmc_sd_card_using_v18(struct mmc_card *card) |
921 | { | |
922 | /* | |
923 | * According to the SD spec., the Bus Speed Mode (function group 1) bits | |
924 | * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus | |
925 | * they can be used to determine if the card has already switched to | |
926 | * 1.8V signaling. | |
927 | */ | |
928 | return card->sw_caps.sd3_bus_mode & | |
929 | (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50); | |
930 | } | |
931 | ||
71578a1e MM |
932 | /* |
933 | * Handle the detection and initialisation of a card. | |
934 | * | |
935 | * In the case of a resume, "oldcard" will contain the card | |
936 | * we're trying to reinitialise. | |
937 | */ | |
938 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
939 | struct mmc_card *oldcard) | |
940 | { | |
941 | struct mmc_card *card; | |
942 | int err; | |
943 | u32 cid[4]; | |
d6d50a15 | 944 | u32 rocr = 0; |
6a11fc47 | 945 | bool v18_fixup_failed = false; |
71578a1e | 946 | |
71578a1e | 947 | WARN_ON(!host->claimed); |
6a11fc47 | 948 | retry: |
d6d50a15 | 949 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
950 | if (err) |
951 | return err; | |
952 | ||
953 | if (oldcard) { | |
099b6481 | 954 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
955 | pr_debug("%s: Perhaps the card was replaced\n", | |
956 | mmc_hostname(host)); | |
71578a1e | 957 | return -ENOENT; |
099b6481 | 958 | } |
7ea239d9 | 959 | |
6abaa0c9 PO |
960 | card = oldcard; |
961 | } else { | |
962 | /* | |
963 | * Allocate card structure. | |
964 | */ | |
51ec92e2 | 965 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
966 | if (IS_ERR(card)) |
967 | return PTR_ERR(card); | |
6abaa0c9 | 968 | |
69041150 | 969 | card->ocr = ocr; |
6abaa0c9 PO |
970 | card->type = MMC_TYPE_SD; |
971 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
972 | } | |
7ea239d9 | 973 | |
eac86321 DA |
974 | /* |
975 | * Call the optional HC's init_card function to handle quirks. | |
976 | */ | |
977 | if (host->ops->init_card) | |
978 | host->ops->init_card(host, card); | |
979 | ||
7ea239d9 | 980 | /* |
af517150 | 981 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 982 | */ |
af517150 DB |
983 | if (!mmc_host_is_spi(host)) { |
984 | err = mmc_send_relative_addr(host, &card->rca); | |
985 | if (err) | |
7fca9675 | 986 | goto free_card; |
af517150 | 987 | } |
7ea239d9 | 988 | |
6abaa0c9 | 989 | if (!oldcard) { |
71578a1e | 990 | err = mmc_sd_get_csd(host, card); |
17b0429d | 991 | if (err) |
7fca9675 | 992 | goto free_card; |
bd766312 | 993 | |
6abaa0c9 PO |
994 | mmc_decode_cid(card); |
995 | } | |
7ea239d9 | 996 | |
3d705d14 SH |
997 | /* |
998 | * handling only for cards supporting DSR and hosts requesting | |
999 | * DSR configuration | |
1000 | */ | |
1001 | if (card->csd.dsr_imp && host->dsr_req) | |
1002 | mmc_set_dsr(host); | |
1003 | ||
7ea239d9 | 1004 | /* |
6abaa0c9 | 1005 | * Select card, as all following commands rely on that. |
7ea239d9 | 1006 | */ |
af517150 DB |
1007 | if (!mmc_host_is_spi(host)) { |
1008 | err = mmc_select_card(card); | |
1009 | if (err) | |
7fca9675 | 1010 | goto free_card; |
6abaa0c9 | 1011 | } |
1addfcdb | 1012 | |
71578a1e MM |
1013 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
1014 | if (err) | |
1015 | goto free_card; | |
9d9f25c0 | 1016 | |
6a11fc47 AH |
1017 | /* |
1018 | * If the card has not been power cycled, it may still be using 1.8V | |
1019 | * signaling. Detect that situation and try to initialize a UHS-I (1.8V) | |
1020 | * transfer mode. | |
1021 | */ | |
1022 | if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) && | |
1023 | mmc_sd_card_using_v18(card) && | |
1024 | host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) { | |
1025 | /* | |
1026 | * Re-read switch information in case it has changed since | |
1027 | * oldcard was initialized. | |
1028 | */ | |
1029 | if (oldcard) { | |
1030 | err = mmc_read_switch(card); | |
1031 | if (err) | |
1032 | goto free_card; | |
1033 | } | |
1034 | if (mmc_sd_card_using_v18(card)) { | |
1035 | if (mmc_host_set_uhs_voltage(host) || | |
1036 | mmc_sd_init_uhs_card(card)) { | |
1037 | v18_fixup_failed = true; | |
1038 | mmc_power_cycle(host, ocr); | |
1039 | if (!oldcard) | |
1040 | mmc_remove_card(card); | |
1041 | goto retry; | |
1042 | } | |
1043 | goto done; | |
1044 | } | |
1045 | } | |
1046 | ||
d6d50a15 | 1047 | /* Initialization sequence for UHS-I cards */ |
d6743a8a | 1048 | if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) { |
d6d50a15 | 1049 | err = mmc_sd_init_uhs_card(card); |
17b0429d | 1050 | if (err) |
7ea239d9 | 1051 | goto free_card; |
d6d50a15 AN |
1052 | } else { |
1053 | /* | |
1054 | * Attempt to change to high-speed (if supported) | |
1055 | */ | |
1056 | err = mmc_sd_switch_hs(card); | |
1057 | if (err > 0) | |
cdc99179 | 1058 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
1059 | else if (err) |
1060 | goto free_card; | |
1061 | ||
1062 | /* | |
1063 | * Set bus speed. | |
1064 | */ | |
1065 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 1066 | |
d6d50a15 AN |
1067 | /* |
1068 | * Switch to wider bus (if supported). | |
1069 | */ | |
1070 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
1071 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
1072 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
1073 | if (err) | |
1074 | goto free_card; | |
1075 | ||
1076 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1077 | } | |
7ea239d9 | 1078 | } |
247cfe53 KR |
1079 | |
1080 | if (host->caps2 & MMC_CAP2_AVOID_3_3V && | |
1081 | host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { | |
1082 | pr_err("%s: Host failed to negotiate down from 3.3V\n", | |
1083 | mmc_hostname(host)); | |
1084 | err = -EINVAL; | |
1085 | goto free_card; | |
1086 | } | |
6a11fc47 | 1087 | done: |
71578a1e | 1088 | host->card = card; |
17b0429d | 1089 | return 0; |
6abaa0c9 PO |
1090 | |
1091 | free_card: | |
1092 | if (!oldcard) | |
1093 | mmc_remove_card(card); | |
6abaa0c9 | 1094 | |
adf66a0d | 1095 | return err; |
6abaa0c9 PO |
1096 | } |
1097 | ||
1098 | /* | |
1099 | * Host is being removed. Free up the current card. | |
1100 | */ | |
1101 | static void mmc_sd_remove(struct mmc_host *host) | |
1102 | { | |
6abaa0c9 PO |
1103 | mmc_remove_card(host->card); |
1104 | host->card = NULL; | |
1105 | } | |
1106 | ||
d3049504 AH |
1107 | /* |
1108 | * Card detection - card is alive. | |
1109 | */ | |
1110 | static int mmc_sd_alive(struct mmc_host *host) | |
1111 | { | |
1112 | return mmc_send_status(host->card, NULL); | |
1113 | } | |
1114 | ||
6abaa0c9 PO |
1115 | /* |
1116 | * Card detection callback from host. | |
1117 | */ | |
1118 | static void mmc_sd_detect(struct mmc_host *host) | |
1119 | { | |
1120 | int err; | |
1121 | ||
6c0cedd1 | 1122 | mmc_get_card(host->card, NULL); |
6abaa0c9 PO |
1123 | |
1124 | /* | |
1125 | * Just check if our card has been removed. | |
1126 | */ | |
d3049504 | 1127 | err = _mmc_detect_card_removed(host); |
7ea239d9 | 1128 | |
6c0cedd1 | 1129 | mmc_put_card(host->card, NULL); |
7ea239d9 | 1130 | |
17b0429d | 1131 | if (err) { |
4101c16a | 1132 | mmc_sd_remove(host); |
6abaa0c9 PO |
1133 | |
1134 | mmc_claim_host(host); | |
1135 | mmc_detach_bus(host); | |
7f7e4129 | 1136 | mmc_power_off(host); |
6abaa0c9 PO |
1137 | mmc_release_host(host); |
1138 | } | |
1139 | } | |
1140 | ||
0cb403a2 | 1141 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1142 | { |
85e727ed JC |
1143 | int err = 0; |
1144 | ||
6abaa0c9 | 1145 | mmc_claim_host(host); |
9ec775f7 UH |
1146 | |
1147 | if (mmc_card_suspended(host->card)) | |
1148 | goto out; | |
1149 | ||
af517150 | 1150 | if (!mmc_host_is_spi(host)) |
85e727ed | 1151 | err = mmc_deselect_cards(host); |
cdc99179 | 1152 | |
9ec775f7 | 1153 | if (!err) { |
74590263 | 1154 | mmc_power_off(host); |
9ec775f7 UH |
1155 | mmc_card_set_suspended(host->card); |
1156 | } | |
95cdfb72 | 1157 | |
9ec775f7 UH |
1158 | out: |
1159 | mmc_release_host(host); | |
85e727ed | 1160 | return err; |
6abaa0c9 PO |
1161 | } |
1162 | ||
1163 | /* | |
0cb403a2 UH |
1164 | * Callback for suspend |
1165 | */ | |
1166 | static int mmc_sd_suspend(struct mmc_host *host) | |
1167 | { | |
1168 | int err; | |
1169 | ||
1170 | err = _mmc_sd_suspend(host); | |
1171 | if (!err) { | |
1172 | pm_runtime_disable(&host->card->dev); | |
1173 | pm_runtime_set_suspended(&host->card->dev); | |
1174 | } | |
1175 | ||
1176 | return err; | |
1177 | } | |
1178 | ||
1179 | /* | |
6abaa0c9 PO |
1180 | * This function tries to determine if the same card is still present |
1181 | * and, if so, restore all state to it. | |
1182 | */ | |
0cb403a2 | 1183 | static int _mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 | 1184 | { |
9ec775f7 | 1185 | int err = 0; |
6abaa0c9 | 1186 | |
6abaa0c9 | 1187 | mmc_claim_host(host); |
9ec775f7 UH |
1188 | |
1189 | if (!mmc_card_suspended(host->card)) | |
1190 | goto out; | |
1191 | ||
69041150 | 1192 | mmc_power_up(host, host->card->ocr); |
69041150 | 1193 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
9ec775f7 | 1194 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1195 | |
9ec775f7 UH |
1196 | out: |
1197 | mmc_release_host(host); | |
95cdfb72 | 1198 | return err; |
6abaa0c9 PO |
1199 | } |
1200 | ||
0cb403a2 UH |
1201 | /* |
1202 | * Callback for resume | |
1203 | */ | |
1204 | static int mmc_sd_resume(struct mmc_host *host) | |
1205 | { | |
0cb403a2 | 1206 | pm_runtime_enable(&host->card->dev); |
c29536e8 | 1207 | return 0; |
0cb403a2 UH |
1208 | } |
1209 | ||
c4d770d7 UH |
1210 | /* |
1211 | * Callback for runtime_suspend. | |
1212 | */ | |
1213 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1214 | { | |
1215 | int err; | |
1216 | ||
1217 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1218 | return 0; | |
1219 | ||
0cb403a2 | 1220 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1221 | if (err) |
f42cf8d6 | 1222 | pr_err("%s: error %d doing aggressive suspend\n", |
c4d770d7 | 1223 | mmc_hostname(host), err); |
c4d770d7 | 1224 | |
c4d770d7 UH |
1225 | return err; |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * Callback for runtime_resume. | |
1230 | */ | |
1231 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1232 | { | |
1233 | int err; | |
1234 | ||
0cb403a2 | 1235 | err = _mmc_sd_resume(host); |
520322d9 | 1236 | if (err && err != -ENOMEDIUM) |
c29536e8 | 1237 | pr_err("%s: error %d doing runtime resume\n", |
c4d770d7 UH |
1238 | mmc_hostname(host), err); |
1239 | ||
c4d770d7 UH |
1240 | return 0; |
1241 | } | |
1242 | ||
3a3db603 | 1243 | static int mmc_sd_hw_reset(struct mmc_host *host) |
dc0ecfef JR |
1244 | { |
1245 | mmc_power_cycle(host, host->card->ocr); | |
3056c49c | 1246 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
dc0ecfef JR |
1247 | } |
1248 | ||
6abaa0c9 PO |
1249 | static const struct mmc_bus_ops mmc_sd_ops = { |
1250 | .remove = mmc_sd_remove, | |
1251 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1252 | .runtime_suspend = mmc_sd_runtime_suspend, |
1253 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1254 | .suspend = mmc_sd_suspend, |
1255 | .resume = mmc_sd_resume, | |
d3049504 | 1256 | .alive = mmc_sd_alive, |
5992e786 | 1257 | .shutdown = mmc_sd_suspend, |
3a3db603 | 1258 | .hw_reset = mmc_sd_hw_reset, |
6abaa0c9 PO |
1259 | }; |
1260 | ||
1261 | /* | |
1262 | * Starting point for SD card init. | |
1263 | */ | |
807e8e40 | 1264 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1265 | { |
1266 | int err; | |
69041150 | 1267 | u32 ocr, rocr; |
6abaa0c9 | 1268 | |
d84075c8 | 1269 | WARN_ON(!host->claimed); |
6abaa0c9 | 1270 | |
807e8e40 AR |
1271 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1272 | if (err) | |
1273 | return err; | |
1274 | ||
2501c917 | 1275 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1276 | if (host->ocr_avail_sd) |
1277 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1278 | |
af517150 DB |
1279 | /* |
1280 | * We need to get OCR a different way for SPI. | |
1281 | */ | |
1282 | if (mmc_host_is_spi(host)) { | |
1283 | mmc_go_idle(host); | |
1284 | ||
1285 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1286 | if (err) | |
1287 | goto err; | |
1288 | } | |
1289 | ||
69041150 | 1290 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1291 | |
1292 | /* | |
1293 | * Can we support the voltage(s) of the card(s)? | |
1294 | */ | |
69041150 | 1295 | if (!rocr) { |
109b5bed | 1296 | err = -EINVAL; |
6abaa0c9 | 1297 | goto err; |
109b5bed | 1298 | } |
6abaa0c9 PO |
1299 | |
1300 | /* | |
1301 | * Detect and init the card. | |
1302 | */ | |
69041150 | 1303 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1304 | if (err) |
6abaa0c9 PO |
1305 | goto err; |
1306 | ||
1307 | mmc_release_host(host); | |
4101c16a | 1308 | err = mmc_add_card(host->card); |
7ea239d9 | 1309 | if (err) |
2986d0bf | 1310 | goto remove_card; |
7ea239d9 | 1311 | |
2860d060 | 1312 | mmc_claim_host(host); |
7ea239d9 PO |
1313 | return 0; |
1314 | ||
2986d0bf | 1315 | remove_card: |
6abaa0c9 | 1316 | mmc_remove_card(host->card); |
7ea239d9 | 1317 | host->card = NULL; |
2986d0bf | 1318 | mmc_claim_host(host); |
7ea239d9 PO |
1319 | err: |
1320 | mmc_detach_bus(host); | |
7ea239d9 | 1321 | |
a3c76eb9 | 1322 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1323 | mmc_hostname(host), err); |
1324 | ||
adf66a0d | 1325 | return err; |
7ea239d9 | 1326 | } |