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 | ||
42 | static const unsigned int tacc_exp[] = { | |
43 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
44 | }; | |
45 | ||
46 | static const unsigned int tacc_mant[] = { | |
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); | |
114 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
115 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
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 | ||
151 | csd->tacc_ns = 0; /* Unused */ | |
152 | csd->tacc_clks = 0; /* Unused */ | |
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 | |
dfe86cba AH |
212 | if (UNSTUFF_BITS(resp, 55, 1)) |
213 | card->erased_byte = 0xFF; | |
214 | else | |
215 | card->erased_byte = 0x0; | |
216 | ||
f0d89972 AW |
217 | if (scr->sda_spec3) |
218 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); | |
bd766312 | 219 | return 0; |
7ea239d9 PO |
220 | } |
221 | ||
dfe86cba AH |
222 | /* |
223 | * Fetch and process SD Status register. | |
224 | */ | |
225 | static int mmc_read_ssr(struct mmc_card *card) | |
226 | { | |
227 | unsigned int au, es, et, eo; | |
e85baa88 | 228 | u32 *raw_ssr; |
5275a652 | 229 | int i; |
dfe86cba AH |
230 | |
231 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
6606110d JP |
232 | pr_warn("%s: card lacks mandatory SD Status function\n", |
233 | mmc_hostname(card->host)); | |
dfe86cba AH |
234 | return 0; |
235 | } | |
236 | ||
e85baa88 PB |
237 | raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL); |
238 | if (!raw_ssr) | |
239 | return -ENOMEM; | |
240 | ||
241 | if (mmc_app_sd_status(card, raw_ssr)) { | |
6606110d JP |
242 | pr_warn("%s: problem reading SD Status register\n", |
243 | mmc_hostname(card->host)); | |
e85baa88 | 244 | kfree(raw_ssr); |
5275a652 | 245 | return 0; |
dfe86cba AH |
246 | } |
247 | ||
248 | for (i = 0; i < 16; i++) | |
e85baa88 PB |
249 | card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]); |
250 | ||
251 | kfree(raw_ssr); | |
dfe86cba AH |
252 | |
253 | /* | |
254 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
255 | * bitfield positions accordingly. | |
256 | */ | |
5275a652 | 257 | au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4); |
9288cac0 WS |
258 | if (au) { |
259 | if (au <= 9 || card->scr.sda_spec3) { | |
260 | card->ssr.au = sd_au_size[au]; | |
5275a652 UY |
261 | es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16); |
262 | et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6); | |
9288cac0 | 263 | if (es && et) { |
5275a652 | 264 | eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2); |
9288cac0 WS |
265 | card->ssr.erase_timeout = (et * 1000) / es; |
266 | card->ssr.erase_offset = eo * 1000; | |
267 | } | |
268 | } else { | |
6606110d JP |
269 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
270 | mmc_hostname(card->host)); | |
dfe86cba | 271 | } |
dfe86cba | 272 | } |
5275a652 UY |
273 | |
274 | return 0; | |
dfe86cba AH |
275 | } |
276 | ||
7ea239d9 | 277 | /* |
1addfcdb | 278 | * Fetches and decodes switch information |
7ea239d9 | 279 | */ |
1addfcdb | 280 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
281 | { |
282 | int err; | |
283 | u8 *status; | |
284 | ||
3373c0ae | 285 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 286 | return 0; |
3373c0ae PO |
287 | |
288 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
6606110d | 289 | pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", |
3373c0ae | 290 | mmc_hostname(card->host)); |
17b0429d | 291 | return 0; |
3373c0ae PO |
292 | } |
293 | ||
17b0429d | 294 | err = -EIO; |
7ea239d9 PO |
295 | |
296 | status = kmalloc(64, GFP_KERNEL); | |
297 | if (!status) { | |
a3c76eb9 | 298 | pr_err("%s: could not allocate a buffer for " |
013909c4 AN |
299 | "switch capabilities.\n", |
300 | mmc_hostname(card->host)); | |
17b0429d | 301 | return -ENOMEM; |
7ea239d9 PO |
302 | } |
303 | ||
a39ca6ae AL |
304 | /* |
305 | * Find out the card's support bits with a mode 0 operation. | |
306 | * The argument does not matter, as the support bits do not | |
307 | * change with the arguments. | |
308 | */ | |
309 | err = mmc_sd_switch(card, 0, 0, 0, status); | |
17b0429d | 310 | if (err) { |
013909c4 AN |
311 | /* |
312 | * If the host or the card can't do the switch, | |
313 | * fail more gracefully. | |
314 | */ | |
315 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
316 | goto out; |
317 | ||
6606110d | 318 | pr_warn("%s: problem reading Bus Speed modes\n", |
3373c0ae | 319 | mmc_hostname(card->host)); |
17b0429d | 320 | err = 0; |
adf66a0d | 321 | |
7ea239d9 PO |
322 | goto out; |
323 | } | |
324 | ||
fffe5d5a QL |
325 | if (status[13] & SD_MODE_HIGH_SPEED) |
326 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; | |
f2815f68 | 327 | |
013909c4 AN |
328 | if (card->scr.sda_spec3) { |
329 | card->sw_caps.sd3_bus_mode = status[13]; | |
a39ca6ae | 330 | /* Driver Strengths supported by the card */ |
013909c4 | 331 | card->sw_caps.sd3_drv_type = status[9]; |
d9812780 | 332 | card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; |
013909c4 | 333 | } |
7ea239d9 | 334 | |
1addfcdb PO |
335 | out: |
336 | kfree(status); | |
337 | ||
338 | return err; | |
339 | } | |
340 | ||
341 | /* | |
342 | * Test if the card supports high-speed mode and, if so, switch to it. | |
343 | */ | |
71578a1e | 344 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
345 | { |
346 | int err; | |
347 | u8 *status; | |
348 | ||
3373c0ae | 349 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 350 | return 0; |
3373c0ae PO |
351 | |
352 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 353 | return 0; |
3373c0ae | 354 | |
1addfcdb | 355 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 356 | return 0; |
1addfcdb PO |
357 | |
358 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 359 | return 0; |
1addfcdb | 360 | |
1addfcdb PO |
361 | status = kmalloc(64, GFP_KERNEL); |
362 | if (!status) { | |
a3c76eb9 | 363 | pr_err("%s: could not allocate a buffer for " |
facba917 | 364 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 365 | return -ENOMEM; |
1addfcdb PO |
366 | } |
367 | ||
7ea239d9 | 368 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 369 | if (err) |
7ea239d9 PO |
370 | goto out; |
371 | ||
372 | if ((status[16] & 0xF) != 1) { | |
6606110d | 373 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 374 | mmc_hostname(card->host)); |
71578a1e | 375 | err = 0; |
7ea239d9 | 376 | } else { |
71578a1e | 377 | err = 1; |
7ea239d9 PO |
378 | } |
379 | ||
380 | out: | |
381 | kfree(status); | |
382 | ||
383 | return err; | |
384 | } | |
385 | ||
d6d50a15 AN |
386 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
387 | { | |
fa021cef | 388 | int card_drv_type, drive_strength, drv_type; |
d6d50a15 AN |
389 | int err; |
390 | ||
3853a042 AH |
391 | card->drive_strength = 0; |
392 | ||
fa021cef | 393 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
ca8e99b3 | 394 | |
e23350b3 AH |
395 | drive_strength = mmc_select_drive_strength(card, |
396 | card->sw_caps.uhs_max_dtr, | |
397 | card_drv_type, &drv_type); | |
d6d50a15 | 398 | |
b4f30a17 AH |
399 | if (drive_strength) { |
400 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); | |
401 | if (err) | |
402 | return err; | |
403 | if ((status[15] & 0xF) != drive_strength) { | |
404 | pr_warn("%s: Problem setting drive strength!\n", | |
405 | mmc_hostname(card->host)); | |
406 | return 0; | |
407 | } | |
3853a042 | 408 | card->drive_strength = drive_strength; |
d6d50a15 AN |
409 | } |
410 | ||
b4f30a17 AH |
411 | if (drv_type) |
412 | mmc_set_driver_type(card->host, drv_type); | |
d6d50a15 AN |
413 | |
414 | return 0; | |
415 | } | |
416 | ||
93c712f9 | 417 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 418 | { |
49c468fc AN |
419 | /* |
420 | * If the host doesn't support any of the UHS-I modes, fallback on | |
421 | * default speed. | |
422 | */ | |
3f8a7fab | 423 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
424 | card->sd_bus_speed = 0; |
425 | return; | |
426 | } | |
49c468fc AN |
427 | |
428 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
429 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 430 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
431 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
432 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 433 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
434 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
435 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
436 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 437 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
438 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
439 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
440 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 441 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
442 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
443 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
444 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
445 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
446 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
447 | } | |
448 | } | |
449 | ||
450 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
451 | { | |
452 | int err; | |
453 | unsigned int timing = 0; | |
454 | ||
455 | switch (card->sd_bus_speed) { | |
456 | case UHS_SDR104_BUS_SPEED: | |
457 | timing = MMC_TIMING_UHS_SDR104; | |
458 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
459 | break; | |
460 | case UHS_DDR50_BUS_SPEED: | |
461 | timing = MMC_TIMING_UHS_DDR50; | |
462 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
463 | break; | |
464 | case UHS_SDR50_BUS_SPEED: | |
465 | timing = MMC_TIMING_UHS_SDR50; | |
466 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
467 | break; | |
468 | case UHS_SDR25_BUS_SPEED: | |
469 | timing = MMC_TIMING_UHS_SDR25; | |
470 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
471 | break; | |
472 | case UHS_SDR12_BUS_SPEED: | |
473 | timing = MMC_TIMING_UHS_SDR12; | |
474 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
475 | break; | |
476 | default: | |
477 | return 0; | |
49c468fc AN |
478 | } |
479 | ||
93c712f9 | 480 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
481 | if (err) |
482 | return err; | |
483 | ||
93c712f9 | 484 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 485 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
486 | mmc_hostname(card->host)); |
487 | else { | |
488 | mmc_set_timing(card->host, timing); | |
489 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
55c4665e AL |
495 | /* Get host's max current setting at its current voltage */ |
496 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
497 | { | |
498 | u32 voltage, max_current; | |
499 | ||
500 | voltage = 1 << host->ios.vdd; | |
501 | switch (voltage) { | |
502 | case MMC_VDD_165_195: | |
503 | max_current = host->max_current_180; | |
504 | break; | |
505 | case MMC_VDD_29_30: | |
506 | case MMC_VDD_30_31: | |
507 | max_current = host->max_current_300; | |
508 | break; | |
509 | case MMC_VDD_32_33: | |
510 | case MMC_VDD_33_34: | |
511 | max_current = host->max_current_330; | |
512 | break; | |
513 | default: | |
514 | max_current = 0; | |
515 | } | |
516 | ||
517 | return max_current; | |
518 | } | |
519 | ||
5371c927 AN |
520 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
521 | { | |
0aa67700 | 522 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 523 | int err; |
55c4665e | 524 | u32 max_current; |
5371c927 AN |
525 | |
526 | /* | |
527 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
528 | * bus speed modes. For other bus speed modes, we do not change the |
529 | * current limit. | |
55c4665e AL |
530 | */ |
531 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
532 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
533 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
534 | return 0; | |
535 | ||
536 | /* | |
537 | * Host has different current capabilities when operating at | |
538 | * different voltages, so find out its max current first. | |
539 | */ | |
540 | max_current = sd_get_host_max_current(card->host); | |
541 | ||
542 | /* | |
a39ca6ae AL |
543 | * We only check host's capability here, if we set a limit that is |
544 | * higher than the card's maximum current, the card will be using its | |
545 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
546 | * when we set current limit to 200ma, the card will draw 200ma, and | |
547 | * when we set current limit to 400/600/800ma, the card will draw its | |
548 | * maximum 300ma from the host. | |
d9812780 RK |
549 | * |
550 | * The above is incorrect: if we try to set a current limit that is | |
551 | * not supported by the card, the card can rightfully error out the | |
552 | * attempt, and remain at the default current limit. This results | |
553 | * in a 300mA card being limited to 200mA even though the host | |
554 | * supports 800mA. Failures seen with SanDisk 8GB UHS cards with | |
555 | * an iMX6 host. --rmk | |
5371c927 | 556 | */ |
d9812780 RK |
557 | if (max_current >= 800 && |
558 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
55c4665e | 559 | current_limit = SD_SET_CURRENT_LIMIT_800; |
d9812780 RK |
560 | else if (max_current >= 600 && |
561 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
55c4665e | 562 | current_limit = SD_SET_CURRENT_LIMIT_600; |
d9812780 RK |
563 | else if (max_current >= 400 && |
564 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
55c4665e | 565 | current_limit = SD_SET_CURRENT_LIMIT_400; |
d9812780 RK |
566 | else if (max_current >= 200 && |
567 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
55c4665e | 568 | current_limit = SD_SET_CURRENT_LIMIT_200; |
5371c927 | 569 | |
0aa67700 PR |
570 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
571 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
572 | if (err) | |
573 | return err; | |
5371c927 | 574 | |
0aa67700 | 575 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 576 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 577 | mmc_hostname(card->host)); |
5371c927 | 578 | |
0aa67700 | 579 | } |
a39ca6ae | 580 | |
5371c927 AN |
581 | return 0; |
582 | } | |
583 | ||
d6d50a15 AN |
584 | /* |
585 | * UHS-I specific initialization procedure | |
586 | */ | |
587 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
588 | { | |
589 | int err; | |
590 | u8 *status; | |
591 | ||
592 | if (!card->scr.sda_spec3) | |
593 | return 0; | |
594 | ||
595 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
596 | return 0; | |
597 | ||
598 | status = kmalloc(64, GFP_KERNEL); | |
599 | if (!status) { | |
a3c76eb9 | 600 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
601 | "switch capabilities.\n", mmc_hostname(card->host)); |
602 | return -ENOMEM; | |
603 | } | |
604 | ||
605 | /* Set 4-bit bus width */ | |
606 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
607 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
608 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
609 | if (err) | |
610 | goto out; | |
611 | ||
612 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
613 | } | |
614 | ||
93c712f9 SJ |
615 | /* |
616 | * Select the bus speed mode depending on host | |
617 | * and card capability. | |
618 | */ | |
619 | sd_update_bus_speed_mode(card); | |
620 | ||
d6d50a15 AN |
621 | /* Set the driver strength for the card */ |
622 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
623 | if (err) |
624 | goto out; | |
625 | ||
93c712f9 SJ |
626 | /* Set current limit for the card */ |
627 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
628 | if (err) |
629 | goto out; | |
630 | ||
93c712f9 SJ |
631 | /* Set bus speed mode of the card */ |
632 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
633 | if (err) |
634 | goto out; | |
635 | ||
810e08ee FS |
636 | /* |
637 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
638 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
639 | */ | |
63e415c6 | 640 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
641 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
642 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || | |
643 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { | |
63e415c6 | 644 | err = mmc_execute_tuning(card); |
4324f6de WY |
645 | |
646 | /* | |
647 | * As SD Specifications Part1 Physical Layer Specification | |
648 | * Version 3.01 says, CMD19 tuning is available for unlocked | |
649 | * cards in transfer state of 1.8V signaling mode. The small | |
650 | * difference between v3.00 and 3.01 spec means that CMD19 | |
651 | * tuning is also available for DDR50 mode. | |
652 | */ | |
e10c3219 | 653 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
4324f6de WY |
654 | pr_warn("%s: ddr50 tuning failed\n", |
655 | mmc_hostname(card->host)); | |
656 | err = 0; | |
657 | } | |
658 | } | |
659 | ||
d6d50a15 AN |
660 | out: |
661 | kfree(status); | |
662 | ||
663 | return err; | |
664 | } | |
665 | ||
51ec92e2 PO |
666 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
667 | card->raw_cid[2], card->raw_cid[3]); | |
668 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
669 | card->raw_csd[2], card->raw_csd[3]); | |
670 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
5275a652 UY |
671 | MMC_DEV_ATTR(ssr, |
672 | "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
673 | card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], | |
674 | card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], | |
675 | card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], | |
676 | card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], | |
677 | card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], | |
678 | card->raw_ssr[15]); | |
51ec92e2 | 679 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
dfe86cba AH |
680 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
681 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
682 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
683 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
684 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
685 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
686 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
687 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
5fb06af7 | 688 | MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); |
51ec92e2 PO |
689 | |
690 | ||
6825a606 BP |
691 | static ssize_t mmc_dsr_show(struct device *dev, |
692 | struct device_attribute *attr, | |
693 | char *buf) | |
694 | { | |
695 | struct mmc_card *card = mmc_dev_to_card(dev); | |
696 | struct mmc_host *host = card->host; | |
697 | ||
698 | if (card->csd.dsr_imp && host->dsr_req) | |
699 | return sprintf(buf, "0x%x\n", host->dsr); | |
700 | else | |
701 | /* return default DSR value */ | |
702 | return sprintf(buf, "0x%x\n", 0x404); | |
703 | } | |
704 | ||
705 | static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); | |
706 | ||
51ec92e2 PO |
707 | static struct attribute *sd_std_attrs[] = { |
708 | &dev_attr_cid.attr, | |
709 | &dev_attr_csd.attr, | |
710 | &dev_attr_scr.attr, | |
5275a652 | 711 | &dev_attr_ssr.attr, |
51ec92e2 | 712 | &dev_attr_date.attr, |
dfe86cba AH |
713 | &dev_attr_erase_size.attr, |
714 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
715 | &dev_attr_fwrev.attr, |
716 | &dev_attr_hwrev.attr, | |
717 | &dev_attr_manfid.attr, | |
718 | &dev_attr_name.attr, | |
719 | &dev_attr_oemid.attr, | |
720 | &dev_attr_serial.attr, | |
5fb06af7 | 721 | &dev_attr_ocr.attr, |
6825a606 | 722 | &dev_attr_dsr.attr, |
51ec92e2 PO |
723 | NULL, |
724 | }; | |
d1e58212 | 725 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 726 | |
71578a1e | 727 | struct device_type sd_type = { |
d1e58212 | 728 | .groups = sd_std_groups, |
51ec92e2 PO |
729 | }; |
730 | ||
7ea239d9 | 731 | /* |
71578a1e | 732 | * Fetch CID from card. |
7ea239d9 | 733 | */ |
d6d50a15 | 734 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 735 | { |
7ea239d9 | 736 | int err; |
55c4665e | 737 | u32 max_current; |
0797e5f1 | 738 | int retries = 10; |
69041150 | 739 | u32 pocr = ocr; |
0797e5f1 JR |
740 | |
741 | try_again: | |
742 | if (!retries) { | |
743 | ocr &= ~SD_OCR_S18R; | |
6606110d | 744 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 745 | } |
7ea239d9 | 746 | |
7ea239d9 PO |
747 | /* |
748 | * Since we're changing the OCR value, we seem to | |
749 | * need to tell some cards to go back to the idle | |
750 | * state. We wait 1ms to give cards time to | |
751 | * respond. | |
752 | */ | |
753 | mmc_go_idle(host); | |
754 | ||
755 | /* | |
756 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
757 | * compliant card and we should set bit 30 | |
758 | * of the ocr to indicate that we can handle | |
759 | * block-addressed SDHC cards. | |
760 | */ | |
6abaa0c9 | 761 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 762 | if (!err) |
f2119df6 | 763 | ocr |= SD_OCR_CCS; |
7ea239d9 | 764 | |
f2119df6 AN |
765 | /* |
766 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
767 | * to switch to 1.8V signaling level. If the card has failed |
768 | * repeatedly to switch however, skip this. | |
f2119df6 | 769 | */ |
0797e5f1 | 770 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
771 | ocr |= SD_OCR_S18R; |
772 | ||
55c4665e AL |
773 | /* |
774 | * If the host can supply more than 150mA at current voltage, | |
775 | * XPC should be set to 1. | |
776 | */ | |
777 | max_current = sd_get_host_max_current(host); | |
778 | if (max_current > 150) | |
f2119df6 AN |
779 | ocr |= SD_OCR_XPC; |
780 | ||
d6d50a15 | 781 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 782 | if (err) |
71578a1e | 783 | return err; |
7ea239d9 | 784 | |
f2119df6 AN |
785 | /* |
786 | * In case CCS and S18A in the response is set, start Signal Voltage | |
787 | * Switch procedure. SPI mode doesn't support CMD11. | |
788 | */ | |
d6d50a15 AN |
789 | if (!mmc_host_is_spi(host) && rocr && |
790 | ((*rocr & 0x41000000) == 0x41000000)) { | |
0f791fda | 791 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
69041150 | 792 | pocr); |
0797e5f1 JR |
793 | if (err == -EAGAIN) { |
794 | retries--; | |
795 | goto try_again; | |
796 | } else if (err) { | |
797 | retries = 0; | |
f2119df6 AN |
798 | goto try_again; |
799 | } | |
800 | } | |
801 | ||
af517150 DB |
802 | if (mmc_host_is_spi(host)) |
803 | err = mmc_send_cid(host, cid); | |
804 | else | |
805 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
806 | |
807 | return err; | |
808 | } | |
809 | ||
810 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
811 | { | |
812 | int err; | |
813 | ||
814 | /* | |
815 | * Fetch CSD from card. | |
816 | */ | |
817 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 818 | if (err) |
71578a1e | 819 | return err; |
7ea239d9 | 820 | |
71578a1e MM |
821 | err = mmc_decode_csd(card); |
822 | if (err) | |
823 | return err; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
9f6e0bff LPC |
828 | static int mmc_sd_get_ro(struct mmc_host *host) |
829 | { | |
830 | int ro; | |
831 | ||
832 | /* | |
833 | * Some systems don't feature a write-protect pin and don't need one. | |
834 | * E.g. because they only have micro-SD card slot. For those systems | |
835 | * assume that the SD card is always read-write. | |
836 | */ | |
837 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) | |
838 | return 0; | |
839 | ||
840 | if (!host->ops->get_ro) | |
841 | return -1; | |
842 | ||
9f6e0bff | 843 | ro = host->ops->get_ro(host); |
9f6e0bff LPC |
844 | |
845 | return ro; | |
846 | } | |
847 | ||
71578a1e MM |
848 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
849 | bool reinit) | |
850 | { | |
851 | int err; | |
852 | ||
853 | if (!reinit) { | |
854 | /* | |
855 | * Fetch SCR from card. | |
856 | */ | |
857 | err = mmc_app_send_scr(card, card->raw_scr); | |
858 | if (err) | |
859 | return err; | |
860 | ||
861 | err = mmc_decode_scr(card); | |
862 | if (err) | |
863 | return err; | |
864 | ||
dfe86cba AH |
865 | /* |
866 | * Fetch and process SD Status register. | |
867 | */ | |
868 | err = mmc_read_ssr(card); | |
869 | if (err) | |
870 | return err; | |
871 | ||
872 | /* Erase init depends on CSD and SSR */ | |
873 | mmc_init_erase(card); | |
874 | ||
71578a1e MM |
875 | /* |
876 | * Fetch switch information from card. | |
877 | */ | |
878 | err = mmc_read_switch(card); | |
879 | if (err) | |
880 | return err; | |
881 | } | |
882 | ||
883 | /* | |
884 | * For SPI, enable CRC as appropriate. | |
885 | * This CRC enable is located AFTER the reading of the | |
886 | * card registers because some SDHC cards are not able | |
887 | * to provide valid CRCs for non-512-byte blocks. | |
888 | */ | |
889 | if (mmc_host_is_spi(host)) { | |
890 | err = mmc_spi_set_crc(host, use_spi_crc); | |
891 | if (err) | |
892 | return err; | |
893 | } | |
894 | ||
895 | /* | |
896 | * Check if read-only switch is active. | |
897 | */ | |
898 | if (!reinit) { | |
9f6e0bff | 899 | int ro = mmc_sd_get_ro(host); |
71578a1e MM |
900 | |
901 | if (ro < 0) { | |
6606110d | 902 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
903 | mmc_hostname(host)); |
904 | } else if (ro > 0) { | |
905 | mmc_card_set_readonly(card); | |
adf66a0d | 906 | } |
71578a1e MM |
907 | } |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
913 | { | |
914 | unsigned max_dtr = (unsigned int)-1; | |
915 | ||
cdc99179 | 916 | if (mmc_card_hs(card)) { |
71578a1e MM |
917 | if (max_dtr > card->sw_caps.hs_max_dtr) |
918 | max_dtr = card->sw_caps.hs_max_dtr; | |
919 | } else if (max_dtr > card->csd.max_dtr) { | |
920 | max_dtr = card->csd.max_dtr; | |
921 | } | |
922 | ||
923 | return max_dtr; | |
924 | } | |
925 | ||
71578a1e MM |
926 | /* |
927 | * Handle the detection and initialisation of a card. | |
928 | * | |
929 | * In the case of a resume, "oldcard" will contain the card | |
930 | * we're trying to reinitialise. | |
931 | */ | |
932 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
933 | struct mmc_card *oldcard) | |
934 | { | |
935 | struct mmc_card *card; | |
936 | int err; | |
937 | u32 cid[4]; | |
d6d50a15 | 938 | u32 rocr = 0; |
71578a1e | 939 | |
71578a1e MM |
940 | WARN_ON(!host->claimed); |
941 | ||
d6d50a15 | 942 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
943 | if (err) |
944 | return err; | |
945 | ||
946 | if (oldcard) { | |
947 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
948 | return -ENOENT; | |
7ea239d9 | 949 | |
6abaa0c9 PO |
950 | card = oldcard; |
951 | } else { | |
952 | /* | |
953 | * Allocate card structure. | |
954 | */ | |
51ec92e2 | 955 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
956 | if (IS_ERR(card)) |
957 | return PTR_ERR(card); | |
6abaa0c9 | 958 | |
69041150 | 959 | card->ocr = ocr; |
6abaa0c9 PO |
960 | card->type = MMC_TYPE_SD; |
961 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
962 | } | |
7ea239d9 | 963 | |
eac86321 DA |
964 | /* |
965 | * Call the optional HC's init_card function to handle quirks. | |
966 | */ | |
967 | if (host->ops->init_card) | |
968 | host->ops->init_card(host, card); | |
969 | ||
7ea239d9 | 970 | /* |
af517150 | 971 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 972 | */ |
af517150 DB |
973 | if (!mmc_host_is_spi(host)) { |
974 | err = mmc_send_relative_addr(host, &card->rca); | |
975 | if (err) | |
7fca9675 | 976 | goto free_card; |
af517150 | 977 | } |
7ea239d9 | 978 | |
6abaa0c9 | 979 | if (!oldcard) { |
71578a1e | 980 | err = mmc_sd_get_csd(host, card); |
17b0429d | 981 | if (err) |
7fca9675 | 982 | goto free_card; |
bd766312 | 983 | |
6abaa0c9 PO |
984 | mmc_decode_cid(card); |
985 | } | |
7ea239d9 | 986 | |
3d705d14 SH |
987 | /* |
988 | * handling only for cards supporting DSR and hosts requesting | |
989 | * DSR configuration | |
990 | */ | |
991 | if (card->csd.dsr_imp && host->dsr_req) | |
992 | mmc_set_dsr(host); | |
993 | ||
7ea239d9 | 994 | /* |
6abaa0c9 | 995 | * Select card, as all following commands rely on that. |
7ea239d9 | 996 | */ |
af517150 DB |
997 | if (!mmc_host_is_spi(host)) { |
998 | err = mmc_select_card(card); | |
999 | if (err) | |
7fca9675 | 1000 | goto free_card; |
6abaa0c9 | 1001 | } |
1addfcdb | 1002 | |
71578a1e MM |
1003 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
1004 | if (err) | |
1005 | goto free_card; | |
9d9f25c0 | 1006 | |
d6d50a15 AN |
1007 | /* Initialization sequence for UHS-I cards */ |
1008 | if (rocr & SD_ROCR_S18A) { | |
1009 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 1010 | if (err) |
7ea239d9 | 1011 | goto free_card; |
d6d50a15 AN |
1012 | } else { |
1013 | /* | |
1014 | * Attempt to change to high-speed (if supported) | |
1015 | */ | |
1016 | err = mmc_sd_switch_hs(card); | |
1017 | if (err > 0) | |
cdc99179 | 1018 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
1019 | else if (err) |
1020 | goto free_card; | |
1021 | ||
1022 | /* | |
1023 | * Set bus speed. | |
1024 | */ | |
1025 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 1026 | |
d6d50a15 AN |
1027 | /* |
1028 | * Switch to wider bus (if supported). | |
1029 | */ | |
1030 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
1031 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
1032 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
1033 | if (err) | |
1034 | goto free_card; | |
1035 | ||
1036 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1037 | } | |
7ea239d9 PO |
1038 | } |
1039 | ||
71578a1e | 1040 | host->card = card; |
17b0429d | 1041 | return 0; |
6abaa0c9 PO |
1042 | |
1043 | free_card: | |
1044 | if (!oldcard) | |
1045 | mmc_remove_card(card); | |
6abaa0c9 | 1046 | |
adf66a0d | 1047 | return err; |
6abaa0c9 PO |
1048 | } |
1049 | ||
1050 | /* | |
1051 | * Host is being removed. Free up the current card. | |
1052 | */ | |
1053 | static void mmc_sd_remove(struct mmc_host *host) | |
1054 | { | |
6abaa0c9 PO |
1055 | mmc_remove_card(host->card); |
1056 | host->card = NULL; | |
1057 | } | |
1058 | ||
d3049504 AH |
1059 | /* |
1060 | * Card detection - card is alive. | |
1061 | */ | |
1062 | static int mmc_sd_alive(struct mmc_host *host) | |
1063 | { | |
1064 | return mmc_send_status(host->card, NULL); | |
1065 | } | |
1066 | ||
6abaa0c9 PO |
1067 | /* |
1068 | * Card detection callback from host. | |
1069 | */ | |
1070 | static void mmc_sd_detect(struct mmc_host *host) | |
1071 | { | |
1072 | int err; | |
1073 | ||
e94cfef6 | 1074 | mmc_get_card(host->card); |
6abaa0c9 PO |
1075 | |
1076 | /* | |
1077 | * Just check if our card has been removed. | |
1078 | */ | |
d3049504 | 1079 | err = _mmc_detect_card_removed(host); |
7ea239d9 | 1080 | |
e94cfef6 | 1081 | mmc_put_card(host->card); |
7ea239d9 | 1082 | |
17b0429d | 1083 | if (err) { |
4101c16a | 1084 | mmc_sd_remove(host); |
6abaa0c9 PO |
1085 | |
1086 | mmc_claim_host(host); | |
1087 | mmc_detach_bus(host); | |
7f7e4129 | 1088 | mmc_power_off(host); |
6abaa0c9 PO |
1089 | mmc_release_host(host); |
1090 | } | |
1091 | } | |
1092 | ||
0cb403a2 | 1093 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1094 | { |
85e727ed JC |
1095 | int err = 0; |
1096 | ||
6abaa0c9 | 1097 | mmc_claim_host(host); |
9ec775f7 UH |
1098 | |
1099 | if (mmc_card_suspended(host->card)) | |
1100 | goto out; | |
1101 | ||
af517150 | 1102 | if (!mmc_host_is_spi(host)) |
85e727ed | 1103 | err = mmc_deselect_cards(host); |
cdc99179 | 1104 | |
9ec775f7 | 1105 | if (!err) { |
74590263 | 1106 | mmc_power_off(host); |
9ec775f7 UH |
1107 | mmc_card_set_suspended(host->card); |
1108 | } | |
95cdfb72 | 1109 | |
9ec775f7 UH |
1110 | out: |
1111 | mmc_release_host(host); | |
85e727ed | 1112 | return err; |
6abaa0c9 PO |
1113 | } |
1114 | ||
1115 | /* | |
0cb403a2 UH |
1116 | * Callback for suspend |
1117 | */ | |
1118 | static int mmc_sd_suspend(struct mmc_host *host) | |
1119 | { | |
1120 | int err; | |
1121 | ||
1122 | err = _mmc_sd_suspend(host); | |
1123 | if (!err) { | |
1124 | pm_runtime_disable(&host->card->dev); | |
1125 | pm_runtime_set_suspended(&host->card->dev); | |
1126 | } | |
1127 | ||
1128 | return err; | |
1129 | } | |
1130 | ||
1131 | /* | |
6abaa0c9 PO |
1132 | * This function tries to determine if the same card is still present |
1133 | * and, if so, restore all state to it. | |
1134 | */ | |
0cb403a2 | 1135 | static int _mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 | 1136 | { |
9ec775f7 | 1137 | int err = 0; |
6abaa0c9 | 1138 | |
6abaa0c9 | 1139 | mmc_claim_host(host); |
9ec775f7 UH |
1140 | |
1141 | if (!mmc_card_suspended(host->card)) | |
1142 | goto out; | |
1143 | ||
69041150 | 1144 | mmc_power_up(host, host->card->ocr); |
69041150 | 1145 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
9ec775f7 | 1146 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1147 | |
9ec775f7 UH |
1148 | out: |
1149 | mmc_release_host(host); | |
95cdfb72 | 1150 | return err; |
6abaa0c9 PO |
1151 | } |
1152 | ||
0cb403a2 UH |
1153 | /* |
1154 | * Callback for resume | |
1155 | */ | |
1156 | static int mmc_sd_resume(struct mmc_host *host) | |
1157 | { | |
0cb403a2 | 1158 | pm_runtime_enable(&host->card->dev); |
c29536e8 | 1159 | return 0; |
0cb403a2 UH |
1160 | } |
1161 | ||
c4d770d7 UH |
1162 | /* |
1163 | * Callback for runtime_suspend. | |
1164 | */ | |
1165 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1166 | { | |
1167 | int err; | |
1168 | ||
1169 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1170 | return 0; | |
1171 | ||
0cb403a2 | 1172 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1173 | if (err) |
f42cf8d6 | 1174 | pr_err("%s: error %d doing aggressive suspend\n", |
c4d770d7 | 1175 | mmc_hostname(host), err); |
c4d770d7 | 1176 | |
c4d770d7 UH |
1177 | return err; |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Callback for runtime_resume. | |
1182 | */ | |
1183 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1184 | { | |
1185 | int err; | |
1186 | ||
0cb403a2 | 1187 | err = _mmc_sd_resume(host); |
520322d9 | 1188 | if (err && err != -ENOMEDIUM) |
c29536e8 | 1189 | pr_err("%s: error %d doing runtime resume\n", |
c4d770d7 UH |
1190 | mmc_hostname(host), err); |
1191 | ||
c4d770d7 UH |
1192 | return 0; |
1193 | } | |
1194 | ||
dc0ecfef JR |
1195 | static int mmc_sd_reset(struct mmc_host *host) |
1196 | { | |
1197 | mmc_power_cycle(host, host->card->ocr); | |
3056c49c | 1198 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
dc0ecfef JR |
1199 | } |
1200 | ||
6abaa0c9 PO |
1201 | static const struct mmc_bus_ops mmc_sd_ops = { |
1202 | .remove = mmc_sd_remove, | |
1203 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1204 | .runtime_suspend = mmc_sd_runtime_suspend, |
1205 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1206 | .suspend = mmc_sd_suspend, |
1207 | .resume = mmc_sd_resume, | |
d3049504 | 1208 | .alive = mmc_sd_alive, |
5992e786 | 1209 | .shutdown = mmc_sd_suspend, |
dc0ecfef | 1210 | .reset = mmc_sd_reset, |
6abaa0c9 PO |
1211 | }; |
1212 | ||
1213 | /* | |
1214 | * Starting point for SD card init. | |
1215 | */ | |
807e8e40 | 1216 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1217 | { |
1218 | int err; | |
69041150 | 1219 | u32 ocr, rocr; |
6abaa0c9 | 1220 | |
d84075c8 | 1221 | WARN_ON(!host->claimed); |
6abaa0c9 | 1222 | |
807e8e40 AR |
1223 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1224 | if (err) | |
1225 | return err; | |
1226 | ||
2501c917 | 1227 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1228 | if (host->ocr_avail_sd) |
1229 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1230 | |
af517150 DB |
1231 | /* |
1232 | * We need to get OCR a different way for SPI. | |
1233 | */ | |
1234 | if (mmc_host_is_spi(host)) { | |
1235 | mmc_go_idle(host); | |
1236 | ||
1237 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1238 | if (err) | |
1239 | goto err; | |
1240 | } | |
1241 | ||
69041150 | 1242 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1243 | |
1244 | /* | |
1245 | * Can we support the voltage(s) of the card(s)? | |
1246 | */ | |
69041150 | 1247 | if (!rocr) { |
109b5bed | 1248 | err = -EINVAL; |
6abaa0c9 | 1249 | goto err; |
109b5bed | 1250 | } |
6abaa0c9 PO |
1251 | |
1252 | /* | |
1253 | * Detect and init the card. | |
1254 | */ | |
69041150 | 1255 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1256 | if (err) |
6abaa0c9 PO |
1257 | goto err; |
1258 | ||
1259 | mmc_release_host(host); | |
4101c16a | 1260 | err = mmc_add_card(host->card); |
7ea239d9 | 1261 | if (err) |
2986d0bf | 1262 | goto remove_card; |
7ea239d9 | 1263 | |
2860d060 | 1264 | mmc_claim_host(host); |
7ea239d9 PO |
1265 | return 0; |
1266 | ||
2986d0bf | 1267 | remove_card: |
6abaa0c9 | 1268 | mmc_remove_card(host->card); |
7ea239d9 | 1269 | host->card = NULL; |
2986d0bf | 1270 | mmc_claim_host(host); |
7ea239d9 PO |
1271 | err: |
1272 | mmc_detach_bus(host); | |
7ea239d9 | 1273 | |
a3c76eb9 | 1274 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1275 | mmc_hostname(host), err); |
1276 | ||
adf66a0d | 1277 | return err; |
7ea239d9 | 1278 | } |