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" | |
4101c16a | 25 | #include "bus.h" |
7ea239d9 | 26 | #include "mmc_ops.h" |
ce101496 | 27 | #include "sd.h" |
7ea239d9 PO |
28 | #include "sd_ops.h" |
29 | ||
7ea239d9 PO |
30 | static const unsigned int tran_exp[] = { |
31 | 10000, 100000, 1000000, 10000000, | |
32 | 0, 0, 0, 0 | |
33 | }; | |
34 | ||
35 | static const unsigned char tran_mant[] = { | |
36 | 0, 10, 12, 13, 15, 20, 25, 30, | |
37 | 35, 40, 45, 50, 55, 60, 70, 80, | |
38 | }; | |
39 | ||
40 | static const unsigned int tacc_exp[] = { | |
41 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
42 | }; | |
43 | ||
44 | static const unsigned int tacc_mant[] = { | |
45 | 0, 10, 12, 13, 15, 20, 25, 30, | |
46 | 35, 40, 45, 50, 55, 60, 70, 80, | |
47 | }; | |
48 | ||
9288cac0 WS |
49 | static const unsigned int sd_au_size[] = { |
50 | 0, SZ_16K / 512, SZ_32K / 512, SZ_64K / 512, | |
51 | SZ_128K / 512, SZ_256K / 512, SZ_512K / 512, SZ_1M / 512, | |
52 | SZ_2M / 512, SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512, | |
53 | SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512, | |
54 | }; | |
55 | ||
7ea239d9 PO |
56 | #define UNSTUFF_BITS(resp,start,size) \ |
57 | ({ \ | |
58 | const int __size = size; \ | |
59 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
60 | const int __off = 3 - ((start) / 32); \ | |
61 | const int __shft = (start) & 31; \ | |
62 | u32 __res; \ | |
63 | \ | |
64 | __res = resp[__off] >> __shft; \ | |
65 | if (__size + __shft > 32) \ | |
66 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
67 | __res & __mask; \ | |
68 | }) | |
69 | ||
70 | /* | |
71 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
72 | */ | |
71578a1e | 73 | void mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
74 | { |
75 | u32 *resp = card->raw_cid; | |
76 | ||
7ea239d9 PO |
77 | /* |
78 | * SD doesn't currently have a version field so we will | |
79 | * have to assume we can parse this. | |
80 | */ | |
81 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
82 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
83 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
84 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
85 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
86 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
87 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
88 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); | |
89 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); | |
90 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); | |
91 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); | |
92 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); | |
93 | ||
94 | card->cid.year += 2000; /* SD cards year offset */ | |
95 | } | |
96 | ||
97 | /* | |
98 | * Given a 128-bit response, decode to our card CSD structure. | |
99 | */ | |
bd766312 | 100 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
101 | { |
102 | struct mmc_csd *csd = &card->csd; | |
103 | unsigned int e, m, csd_struct; | |
104 | u32 *resp = card->raw_csd; | |
105 | ||
106 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
107 | ||
108 | switch (csd_struct) { | |
109 | case 0: | |
110 | m = UNSTUFF_BITS(resp, 115, 4); | |
111 | e = UNSTUFF_BITS(resp, 112, 3); | |
112 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
113 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
114 | ||
115 | m = UNSTUFF_BITS(resp, 99, 4); | |
116 | e = UNSTUFF_BITS(resp, 96, 3); | |
117 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
118 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
119 | ||
120 | e = UNSTUFF_BITS(resp, 47, 3); | |
121 | m = UNSTUFF_BITS(resp, 62, 12); | |
122 | csd->capacity = (1 + m) << (e + 2); | |
123 | ||
124 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
125 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
126 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
127 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
3d705d14 | 128 | csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1); |
7ea239d9 PO |
129 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); |
130 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
131 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
dfe86cba AH |
132 | |
133 | if (UNSTUFF_BITS(resp, 46, 1)) { | |
134 | csd->erase_size = 1; | |
135 | } else if (csd->write_blkbits >= 9) { | |
136 | csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; | |
137 | csd->erase_size <<= csd->write_blkbits - 9; | |
138 | } | |
7ea239d9 PO |
139 | break; |
140 | case 1: | |
141 | /* | |
3a303511 | 142 | * This is a block-addressed SDHC or SDXC card. Most |
7ea239d9 PO |
143 | * interesting fields are unused and have fixed |
144 | * values. To avoid getting tripped by buggy cards, | |
145 | * we assume those fixed values ourselves. | |
146 | */ | |
147 | mmc_card_set_blockaddr(card); | |
148 | ||
149 | csd->tacc_ns = 0; /* Unused */ | |
150 | csd->tacc_clks = 0; /* Unused */ | |
151 | ||
152 | m = UNSTUFF_BITS(resp, 99, 4); | |
153 | e = UNSTUFF_BITS(resp, 96, 3); | |
154 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
155 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
3a303511 AN |
156 | csd->c_size = UNSTUFF_BITS(resp, 48, 22); |
157 | ||
158 | /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ | |
159 | if (csd->c_size >= 0xFFFF) | |
160 | mmc_card_set_ext_capacity(card); | |
7ea239d9 PO |
161 | |
162 | m = UNSTUFF_BITS(resp, 48, 22); | |
163 | csd->capacity = (1 + m) << 10; | |
164 | ||
165 | csd->read_blkbits = 9; | |
166 | csd->read_partial = 0; | |
167 | csd->write_misalign = 0; | |
168 | csd->read_misalign = 0; | |
169 | csd->r2w_factor = 4; /* Unused */ | |
170 | csd->write_blkbits = 9; | |
171 | csd->write_partial = 0; | |
dfe86cba | 172 | csd->erase_size = 1; |
7ea239d9 PO |
173 | break; |
174 | default: | |
a3c76eb9 | 175 | pr_err("%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 176 | mmc_hostname(card->host), csd_struct); |
bd766312 | 177 | return -EINVAL; |
7ea239d9 | 178 | } |
bd766312 | 179 | |
dfe86cba AH |
180 | card->erase_size = csd->erase_size; |
181 | ||
bd766312 | 182 | return 0; |
7ea239d9 PO |
183 | } |
184 | ||
185 | /* | |
186 | * Given a 64-bit response, decode to our card SCR structure. | |
187 | */ | |
bd766312 | 188 | static int mmc_decode_scr(struct mmc_card *card) |
7ea239d9 PO |
189 | { |
190 | struct sd_scr *scr = &card->scr; | |
191 | unsigned int scr_struct; | |
192 | u32 resp[4]; | |
193 | ||
7ea239d9 PO |
194 | resp[3] = card->raw_scr[1]; |
195 | resp[2] = card->raw_scr[0]; | |
196 | ||
197 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
198 | if (scr_struct != 0) { | |
a3c76eb9 | 199 | pr_err("%s: unrecognised SCR structure version %d\n", |
7ea239d9 | 200 | mmc_hostname(card->host), scr_struct); |
bd766312 | 201 | return -EINVAL; |
7ea239d9 PO |
202 | } |
203 | ||
204 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
205 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
013909c4 AN |
206 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
207 | /* Check if Physical Layer Spec v3.0 is supported */ | |
208 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); | |
bd766312 | 209 | |
dfe86cba AH |
210 | if (UNSTUFF_BITS(resp, 55, 1)) |
211 | card->erased_byte = 0xFF; | |
212 | else | |
213 | card->erased_byte = 0x0; | |
214 | ||
f0d89972 AW |
215 | if (scr->sda_spec3) |
216 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); | |
bd766312 | 217 | return 0; |
7ea239d9 PO |
218 | } |
219 | ||
dfe86cba AH |
220 | /* |
221 | * Fetch and process SD Status register. | |
222 | */ | |
223 | static int mmc_read_ssr(struct mmc_card *card) | |
224 | { | |
225 | unsigned int au, es, et, eo; | |
581369f2 | 226 | int i; |
dfe86cba AH |
227 | |
228 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
6606110d JP |
229 | pr_warn("%s: card lacks mandatory SD Status function\n", |
230 | mmc_hostname(card->host)); | |
dfe86cba AH |
231 | return 0; |
232 | } | |
233 | ||
581369f2 | 234 | if (mmc_app_sd_status(card, card->raw_ssr)) { |
6606110d JP |
235 | pr_warn("%s: problem reading SD Status register\n", |
236 | mmc_hostname(card->host)); | |
581369f2 | 237 | return 0; |
dfe86cba AH |
238 | } |
239 | ||
240 | for (i = 0; i < 16; i++) | |
581369f2 | 241 | card->raw_ssr[i] = be32_to_cpu(card->raw_ssr[i]); |
dfe86cba AH |
242 | |
243 | /* | |
244 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
245 | * bitfield positions accordingly. | |
246 | */ | |
581369f2 | 247 | au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4); |
9288cac0 WS |
248 | if (au) { |
249 | if (au <= 9 || card->scr.sda_spec3) { | |
250 | card->ssr.au = sd_au_size[au]; | |
581369f2 UY |
251 | es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16); |
252 | et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6); | |
9288cac0 | 253 | if (es && et) { |
581369f2 | 254 | eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2); |
9288cac0 WS |
255 | card->ssr.erase_timeout = (et * 1000) / es; |
256 | card->ssr.erase_offset = eo * 1000; | |
257 | } | |
258 | } else { | |
6606110d JP |
259 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
260 | mmc_hostname(card->host)); | |
dfe86cba | 261 | } |
dfe86cba | 262 | } |
581369f2 UY |
263 | |
264 | return 0; | |
dfe86cba AH |
265 | } |
266 | ||
7ea239d9 | 267 | /* |
1addfcdb | 268 | * Fetches and decodes switch information |
7ea239d9 | 269 | */ |
1addfcdb | 270 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
271 | { |
272 | int err; | |
273 | u8 *status; | |
274 | ||
3373c0ae | 275 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 276 | return 0; |
3373c0ae PO |
277 | |
278 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
6606110d | 279 | pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", |
3373c0ae | 280 | mmc_hostname(card->host)); |
17b0429d | 281 | return 0; |
3373c0ae PO |
282 | } |
283 | ||
17b0429d | 284 | err = -EIO; |
7ea239d9 PO |
285 | |
286 | status = kmalloc(64, GFP_KERNEL); | |
287 | if (!status) { | |
a3c76eb9 | 288 | pr_err("%s: could not allocate a buffer for " |
013909c4 AN |
289 | "switch capabilities.\n", |
290 | mmc_hostname(card->host)); | |
17b0429d | 291 | return -ENOMEM; |
7ea239d9 PO |
292 | } |
293 | ||
a39ca6ae AL |
294 | /* |
295 | * Find out the card's support bits with a mode 0 operation. | |
296 | * The argument does not matter, as the support bits do not | |
297 | * change with the arguments. | |
298 | */ | |
299 | err = mmc_sd_switch(card, 0, 0, 0, status); | |
17b0429d | 300 | if (err) { |
013909c4 AN |
301 | /* |
302 | * If the host or the card can't do the switch, | |
303 | * fail more gracefully. | |
304 | */ | |
305 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
306 | goto out; |
307 | ||
6606110d | 308 | pr_warn("%s: problem reading Bus Speed modes\n", |
3373c0ae | 309 | mmc_hostname(card->host)); |
17b0429d | 310 | err = 0; |
adf66a0d | 311 | |
7ea239d9 PO |
312 | goto out; |
313 | } | |
314 | ||
fffe5d5a QL |
315 | if (status[13] & SD_MODE_HIGH_SPEED) |
316 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; | |
f2815f68 | 317 | |
013909c4 AN |
318 | if (card->scr.sda_spec3) { |
319 | card->sw_caps.sd3_bus_mode = status[13]; | |
a39ca6ae | 320 | /* Driver Strengths supported by the card */ |
013909c4 | 321 | card->sw_caps.sd3_drv_type = status[9]; |
d9812780 | 322 | card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; |
013909c4 | 323 | } |
7ea239d9 | 324 | |
1addfcdb PO |
325 | out: |
326 | kfree(status); | |
327 | ||
328 | return err; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Test if the card supports high-speed mode and, if so, switch to it. | |
333 | */ | |
71578a1e | 334 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
335 | { |
336 | int err; | |
337 | u8 *status; | |
338 | ||
3373c0ae | 339 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 340 | return 0; |
3373c0ae PO |
341 | |
342 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 343 | return 0; |
3373c0ae | 344 | |
1addfcdb | 345 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 346 | return 0; |
1addfcdb PO |
347 | |
348 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 349 | return 0; |
1addfcdb | 350 | |
1addfcdb PO |
351 | status = kmalloc(64, GFP_KERNEL); |
352 | if (!status) { | |
a3c76eb9 | 353 | pr_err("%s: could not allocate a buffer for " |
facba917 | 354 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 355 | return -ENOMEM; |
1addfcdb PO |
356 | } |
357 | ||
7ea239d9 | 358 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 359 | if (err) |
7ea239d9 PO |
360 | goto out; |
361 | ||
362 | if ((status[16] & 0xF) != 1) { | |
6606110d | 363 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 364 | mmc_hostname(card->host)); |
71578a1e | 365 | err = 0; |
7ea239d9 | 366 | } else { |
71578a1e | 367 | err = 1; |
7ea239d9 PO |
368 | } |
369 | ||
370 | out: | |
371 | kfree(status); | |
372 | ||
373 | return err; | |
374 | } | |
375 | ||
d6d50a15 AN |
376 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
377 | { | |
fa021cef | 378 | int card_drv_type, drive_strength, drv_type; |
d6d50a15 AN |
379 | int err; |
380 | ||
3853a042 AH |
381 | card->drive_strength = 0; |
382 | ||
fa021cef | 383 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
ca8e99b3 | 384 | |
e23350b3 AH |
385 | drive_strength = mmc_select_drive_strength(card, |
386 | card->sw_caps.uhs_max_dtr, | |
387 | card_drv_type, &drv_type); | |
d6d50a15 | 388 | |
b4f30a17 AH |
389 | if (drive_strength) { |
390 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); | |
391 | if (err) | |
392 | return err; | |
393 | if ((status[15] & 0xF) != drive_strength) { | |
394 | pr_warn("%s: Problem setting drive strength!\n", | |
395 | mmc_hostname(card->host)); | |
396 | return 0; | |
397 | } | |
3853a042 | 398 | card->drive_strength = drive_strength; |
d6d50a15 AN |
399 | } |
400 | ||
b4f30a17 AH |
401 | if (drv_type) |
402 | mmc_set_driver_type(card->host, drv_type); | |
d6d50a15 AN |
403 | |
404 | return 0; | |
405 | } | |
406 | ||
93c712f9 | 407 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 408 | { |
49c468fc AN |
409 | /* |
410 | * If the host doesn't support any of the UHS-I modes, fallback on | |
411 | * default speed. | |
412 | */ | |
3f8a7fab | 413 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
414 | card->sd_bus_speed = 0; |
415 | return; | |
416 | } | |
49c468fc AN |
417 | |
418 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
419 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 420 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
421 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
422 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 423 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
424 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
425 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
426 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 427 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
428 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
429 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
430 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 431 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
432 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
433 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
434 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
435 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
436 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
437 | } | |
438 | } | |
439 | ||
440 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
441 | { | |
442 | int err; | |
443 | unsigned int timing = 0; | |
444 | ||
445 | switch (card->sd_bus_speed) { | |
446 | case UHS_SDR104_BUS_SPEED: | |
447 | timing = MMC_TIMING_UHS_SDR104; | |
448 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
449 | break; | |
450 | case UHS_DDR50_BUS_SPEED: | |
451 | timing = MMC_TIMING_UHS_DDR50; | |
452 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
453 | break; | |
454 | case UHS_SDR50_BUS_SPEED: | |
455 | timing = MMC_TIMING_UHS_SDR50; | |
456 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
457 | break; | |
458 | case UHS_SDR25_BUS_SPEED: | |
459 | timing = MMC_TIMING_UHS_SDR25; | |
460 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
461 | break; | |
462 | case UHS_SDR12_BUS_SPEED: | |
463 | timing = MMC_TIMING_UHS_SDR12; | |
464 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
465 | break; | |
466 | default: | |
467 | return 0; | |
49c468fc AN |
468 | } |
469 | ||
93c712f9 | 470 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
471 | if (err) |
472 | return err; | |
473 | ||
93c712f9 | 474 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 475 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
476 | mmc_hostname(card->host)); |
477 | else { | |
478 | mmc_set_timing(card->host, timing); | |
479 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
480 | } | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
55c4665e AL |
485 | /* Get host's max current setting at its current voltage */ |
486 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
487 | { | |
488 | u32 voltage, max_current; | |
489 | ||
490 | voltage = 1 << host->ios.vdd; | |
491 | switch (voltage) { | |
492 | case MMC_VDD_165_195: | |
493 | max_current = host->max_current_180; | |
494 | break; | |
495 | case MMC_VDD_29_30: | |
496 | case MMC_VDD_30_31: | |
497 | max_current = host->max_current_300; | |
498 | break; | |
499 | case MMC_VDD_32_33: | |
500 | case MMC_VDD_33_34: | |
501 | max_current = host->max_current_330; | |
502 | break; | |
503 | default: | |
504 | max_current = 0; | |
505 | } | |
506 | ||
507 | return max_current; | |
508 | } | |
509 | ||
5371c927 AN |
510 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
511 | { | |
0aa67700 | 512 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 513 | int err; |
55c4665e | 514 | u32 max_current; |
5371c927 AN |
515 | |
516 | /* | |
517 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
518 | * bus speed modes. For other bus speed modes, we do not change the |
519 | * current limit. | |
55c4665e AL |
520 | */ |
521 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
522 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
523 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
524 | return 0; | |
525 | ||
526 | /* | |
527 | * Host has different current capabilities when operating at | |
528 | * different voltages, so find out its max current first. | |
529 | */ | |
530 | max_current = sd_get_host_max_current(card->host); | |
531 | ||
532 | /* | |
a39ca6ae AL |
533 | * We only check host's capability here, if we set a limit that is |
534 | * higher than the card's maximum current, the card will be using its | |
535 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
536 | * when we set current limit to 200ma, the card will draw 200ma, and | |
537 | * when we set current limit to 400/600/800ma, the card will draw its | |
538 | * maximum 300ma from the host. | |
d9812780 RK |
539 | * |
540 | * The above is incorrect: if we try to set a current limit that is | |
541 | * not supported by the card, the card can rightfully error out the | |
542 | * attempt, and remain at the default current limit. This results | |
543 | * in a 300mA card being limited to 200mA even though the host | |
544 | * supports 800mA. Failures seen with SanDisk 8GB UHS cards with | |
545 | * an iMX6 host. --rmk | |
5371c927 | 546 | */ |
d9812780 RK |
547 | if (max_current >= 800 && |
548 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
55c4665e | 549 | current_limit = SD_SET_CURRENT_LIMIT_800; |
d9812780 RK |
550 | else if (max_current >= 600 && |
551 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
55c4665e | 552 | current_limit = SD_SET_CURRENT_LIMIT_600; |
d9812780 RK |
553 | else if (max_current >= 400 && |
554 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
55c4665e | 555 | current_limit = SD_SET_CURRENT_LIMIT_400; |
d9812780 RK |
556 | else if (max_current >= 200 && |
557 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
55c4665e | 558 | current_limit = SD_SET_CURRENT_LIMIT_200; |
5371c927 | 559 | |
0aa67700 PR |
560 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
561 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
562 | if (err) | |
563 | return err; | |
5371c927 | 564 | |
0aa67700 | 565 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 566 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 567 | mmc_hostname(card->host)); |
5371c927 | 568 | |
0aa67700 | 569 | } |
a39ca6ae | 570 | |
5371c927 AN |
571 | return 0; |
572 | } | |
573 | ||
d6d50a15 AN |
574 | /* |
575 | * UHS-I specific initialization procedure | |
576 | */ | |
577 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
578 | { | |
579 | int err; | |
580 | u8 *status; | |
581 | ||
582 | if (!card->scr.sda_spec3) | |
583 | return 0; | |
584 | ||
585 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
586 | return 0; | |
587 | ||
588 | status = kmalloc(64, GFP_KERNEL); | |
589 | if (!status) { | |
a3c76eb9 | 590 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
591 | "switch capabilities.\n", mmc_hostname(card->host)); |
592 | return -ENOMEM; | |
593 | } | |
594 | ||
595 | /* Set 4-bit bus width */ | |
596 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
597 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
598 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
599 | if (err) | |
600 | goto out; | |
601 | ||
602 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
603 | } | |
604 | ||
93c712f9 SJ |
605 | /* |
606 | * Select the bus speed mode depending on host | |
607 | * and card capability. | |
608 | */ | |
609 | sd_update_bus_speed_mode(card); | |
610 | ||
d6d50a15 AN |
611 | /* Set the driver strength for the card */ |
612 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
613 | if (err) |
614 | goto out; | |
615 | ||
93c712f9 SJ |
616 | /* Set current limit for the card */ |
617 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
618 | if (err) |
619 | goto out; | |
620 | ||
93c712f9 SJ |
621 | /* Set bus speed mode of the card */ |
622 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
623 | if (err) |
624 | goto out; | |
625 | ||
810e08ee FS |
626 | /* |
627 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
628 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
629 | */ | |
63e415c6 | 630 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
631 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
632 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || | |
633 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { | |
63e415c6 | 634 | err = mmc_execute_tuning(card); |
4324f6de WY |
635 | |
636 | /* | |
637 | * As SD Specifications Part1 Physical Layer Specification | |
638 | * Version 3.01 says, CMD19 tuning is available for unlocked | |
639 | * cards in transfer state of 1.8V signaling mode. The small | |
640 | * difference between v3.00 and 3.01 spec means that CMD19 | |
641 | * tuning is also available for DDR50 mode. | |
642 | */ | |
e10c3219 | 643 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
4324f6de WY |
644 | pr_warn("%s: ddr50 tuning failed\n", |
645 | mmc_hostname(card->host)); | |
646 | err = 0; | |
647 | } | |
648 | } | |
649 | ||
d6d50a15 AN |
650 | out: |
651 | kfree(status); | |
652 | ||
653 | return err; | |
654 | } | |
655 | ||
51ec92e2 PO |
656 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
657 | card->raw_cid[2], card->raw_cid[3]); | |
658 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
659 | card->raw_csd[2], card->raw_csd[3]); | |
660 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
581369f2 UY |
661 | MMC_DEV_ATTR(ssr, |
662 | "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n", | |
663 | card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2], | |
664 | card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5], | |
665 | card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8], | |
666 | card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11], | |
667 | card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14], | |
668 | card->raw_ssr[15]); | |
51ec92e2 | 669 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); |
dfe86cba AH |
670 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
671 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
672 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
673 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
674 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
675 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
676 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
677 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
5fb06af7 | 678 | MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); |
51ec92e2 PO |
679 | |
680 | ||
6825a606 BP |
681 | static ssize_t mmc_dsr_show(struct device *dev, |
682 | struct device_attribute *attr, | |
683 | char *buf) | |
684 | { | |
685 | struct mmc_card *card = mmc_dev_to_card(dev); | |
686 | struct mmc_host *host = card->host; | |
687 | ||
688 | if (card->csd.dsr_imp && host->dsr_req) | |
689 | return sprintf(buf, "0x%x\n", host->dsr); | |
690 | else | |
691 | /* return default DSR value */ | |
692 | return sprintf(buf, "0x%x\n", 0x404); | |
693 | } | |
694 | ||
695 | static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); | |
696 | ||
51ec92e2 PO |
697 | static struct attribute *sd_std_attrs[] = { |
698 | &dev_attr_cid.attr, | |
699 | &dev_attr_csd.attr, | |
700 | &dev_attr_scr.attr, | |
581369f2 | 701 | &dev_attr_ssr.attr, |
51ec92e2 | 702 | &dev_attr_date.attr, |
dfe86cba AH |
703 | &dev_attr_erase_size.attr, |
704 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
705 | &dev_attr_fwrev.attr, |
706 | &dev_attr_hwrev.attr, | |
707 | &dev_attr_manfid.attr, | |
708 | &dev_attr_name.attr, | |
709 | &dev_attr_oemid.attr, | |
710 | &dev_attr_serial.attr, | |
5fb06af7 | 711 | &dev_attr_ocr.attr, |
6825a606 | 712 | &dev_attr_dsr.attr, |
51ec92e2 PO |
713 | NULL, |
714 | }; | |
d1e58212 | 715 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 716 | |
71578a1e | 717 | struct device_type sd_type = { |
d1e58212 | 718 | .groups = sd_std_groups, |
51ec92e2 PO |
719 | }; |
720 | ||
7ea239d9 | 721 | /* |
71578a1e | 722 | * Fetch CID from card. |
7ea239d9 | 723 | */ |
d6d50a15 | 724 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 725 | { |
7ea239d9 | 726 | int err; |
55c4665e | 727 | u32 max_current; |
0797e5f1 | 728 | int retries = 10; |
69041150 | 729 | u32 pocr = ocr; |
0797e5f1 JR |
730 | |
731 | try_again: | |
732 | if (!retries) { | |
733 | ocr &= ~SD_OCR_S18R; | |
6606110d | 734 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 735 | } |
7ea239d9 | 736 | |
7ea239d9 PO |
737 | /* |
738 | * Since we're changing the OCR value, we seem to | |
739 | * need to tell some cards to go back to the idle | |
740 | * state. We wait 1ms to give cards time to | |
741 | * respond. | |
742 | */ | |
743 | mmc_go_idle(host); | |
744 | ||
745 | /* | |
746 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
747 | * compliant card and we should set bit 30 | |
748 | * of the ocr to indicate that we can handle | |
749 | * block-addressed SDHC cards. | |
750 | */ | |
6abaa0c9 | 751 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 752 | if (!err) |
f2119df6 | 753 | ocr |= SD_OCR_CCS; |
7ea239d9 | 754 | |
f2119df6 AN |
755 | /* |
756 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
757 | * to switch to 1.8V signaling level. If the card has failed |
758 | * repeatedly to switch however, skip this. | |
f2119df6 | 759 | */ |
0797e5f1 | 760 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
761 | ocr |= SD_OCR_S18R; |
762 | ||
55c4665e AL |
763 | /* |
764 | * If the host can supply more than 150mA at current voltage, | |
765 | * XPC should be set to 1. | |
766 | */ | |
767 | max_current = sd_get_host_max_current(host); | |
768 | if (max_current > 150) | |
f2119df6 AN |
769 | ocr |= SD_OCR_XPC; |
770 | ||
d6d50a15 | 771 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 772 | if (err) |
71578a1e | 773 | return err; |
7ea239d9 | 774 | |
f2119df6 AN |
775 | /* |
776 | * In case CCS and S18A in the response is set, start Signal Voltage | |
777 | * Switch procedure. SPI mode doesn't support CMD11. | |
778 | */ | |
d6d50a15 AN |
779 | if (!mmc_host_is_spi(host) && rocr && |
780 | ((*rocr & 0x41000000) == 0x41000000)) { | |
0f791fda | 781 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
69041150 | 782 | pocr); |
0797e5f1 JR |
783 | if (err == -EAGAIN) { |
784 | retries--; | |
785 | goto try_again; | |
786 | } else if (err) { | |
787 | retries = 0; | |
f2119df6 AN |
788 | goto try_again; |
789 | } | |
790 | } | |
791 | ||
af517150 DB |
792 | if (mmc_host_is_spi(host)) |
793 | err = mmc_send_cid(host, cid); | |
794 | else | |
795 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
796 | |
797 | return err; | |
798 | } | |
799 | ||
800 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
801 | { | |
802 | int err; | |
803 | ||
804 | /* | |
805 | * Fetch CSD from card. | |
806 | */ | |
807 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 808 | if (err) |
71578a1e | 809 | return err; |
7ea239d9 | 810 | |
71578a1e MM |
811 | err = mmc_decode_csd(card); |
812 | if (err) | |
813 | return err; | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
9f6e0bff LPC |
818 | static int mmc_sd_get_ro(struct mmc_host *host) |
819 | { | |
820 | int ro; | |
821 | ||
822 | /* | |
823 | * Some systems don't feature a write-protect pin and don't need one. | |
824 | * E.g. because they only have micro-SD card slot. For those systems | |
825 | * assume that the SD card is always read-write. | |
826 | */ | |
827 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) | |
828 | return 0; | |
829 | ||
830 | if (!host->ops->get_ro) | |
831 | return -1; | |
832 | ||
9f6e0bff | 833 | ro = host->ops->get_ro(host); |
9f6e0bff LPC |
834 | |
835 | return ro; | |
836 | } | |
837 | ||
71578a1e MM |
838 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
839 | bool reinit) | |
840 | { | |
841 | int err; | |
842 | ||
843 | if (!reinit) { | |
844 | /* | |
845 | * Fetch SCR from card. | |
846 | */ | |
847 | err = mmc_app_send_scr(card, card->raw_scr); | |
848 | if (err) | |
849 | return err; | |
850 | ||
851 | err = mmc_decode_scr(card); | |
852 | if (err) | |
853 | return err; | |
854 | ||
dfe86cba AH |
855 | /* |
856 | * Fetch and process SD Status register. | |
857 | */ | |
858 | err = mmc_read_ssr(card); | |
859 | if (err) | |
860 | return err; | |
861 | ||
862 | /* Erase init depends on CSD and SSR */ | |
863 | mmc_init_erase(card); | |
864 | ||
71578a1e MM |
865 | /* |
866 | * Fetch switch information from card. | |
867 | */ | |
868 | err = mmc_read_switch(card); | |
869 | if (err) | |
870 | return err; | |
871 | } | |
872 | ||
873 | /* | |
874 | * For SPI, enable CRC as appropriate. | |
875 | * This CRC enable is located AFTER the reading of the | |
876 | * card registers because some SDHC cards are not able | |
877 | * to provide valid CRCs for non-512-byte blocks. | |
878 | */ | |
879 | if (mmc_host_is_spi(host)) { | |
880 | err = mmc_spi_set_crc(host, use_spi_crc); | |
881 | if (err) | |
882 | return err; | |
883 | } | |
884 | ||
885 | /* | |
886 | * Check if read-only switch is active. | |
887 | */ | |
888 | if (!reinit) { | |
9f6e0bff | 889 | int ro = mmc_sd_get_ro(host); |
71578a1e MM |
890 | |
891 | if (ro < 0) { | |
6606110d | 892 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
893 | mmc_hostname(host)); |
894 | } else if (ro > 0) { | |
895 | mmc_card_set_readonly(card); | |
adf66a0d | 896 | } |
71578a1e MM |
897 | } |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
902 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
903 | { | |
904 | unsigned max_dtr = (unsigned int)-1; | |
905 | ||
cdc99179 | 906 | if (mmc_card_hs(card)) { |
71578a1e MM |
907 | if (max_dtr > card->sw_caps.hs_max_dtr) |
908 | max_dtr = card->sw_caps.hs_max_dtr; | |
909 | } else if (max_dtr > card->csd.max_dtr) { | |
910 | max_dtr = card->csd.max_dtr; | |
911 | } | |
912 | ||
913 | return max_dtr; | |
914 | } | |
915 | ||
71578a1e MM |
916 | /* |
917 | * Handle the detection and initialisation of a card. | |
918 | * | |
919 | * In the case of a resume, "oldcard" will contain the card | |
920 | * we're trying to reinitialise. | |
921 | */ | |
922 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
923 | struct mmc_card *oldcard) | |
924 | { | |
925 | struct mmc_card *card; | |
926 | int err; | |
927 | u32 cid[4]; | |
d6d50a15 | 928 | u32 rocr = 0; |
71578a1e MM |
929 | |
930 | BUG_ON(!host); | |
931 | WARN_ON(!host->claimed); | |
932 | ||
d6d50a15 | 933 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
934 | if (err) |
935 | return err; | |
936 | ||
937 | if (oldcard) { | |
938 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
939 | return -ENOENT; | |
7ea239d9 | 940 | |
6abaa0c9 PO |
941 | card = oldcard; |
942 | } else { | |
943 | /* | |
944 | * Allocate card structure. | |
945 | */ | |
51ec92e2 | 946 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
947 | if (IS_ERR(card)) |
948 | return PTR_ERR(card); | |
6abaa0c9 | 949 | |
69041150 | 950 | card->ocr = ocr; |
6abaa0c9 PO |
951 | card->type = MMC_TYPE_SD; |
952 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
953 | } | |
7ea239d9 | 954 | |
eac86321 DA |
955 | /* |
956 | * Call the optional HC's init_card function to handle quirks. | |
957 | */ | |
958 | if (host->ops->init_card) | |
959 | host->ops->init_card(host, card); | |
960 | ||
7ea239d9 | 961 | /* |
af517150 | 962 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 963 | */ |
af517150 DB |
964 | if (!mmc_host_is_spi(host)) { |
965 | err = mmc_send_relative_addr(host, &card->rca); | |
966 | if (err) | |
7fca9675 | 967 | goto free_card; |
af517150 | 968 | } |
7ea239d9 | 969 | |
6abaa0c9 | 970 | if (!oldcard) { |
71578a1e | 971 | err = mmc_sd_get_csd(host, card); |
17b0429d | 972 | if (err) |
7fca9675 | 973 | goto free_card; |
bd766312 | 974 | |
6abaa0c9 PO |
975 | mmc_decode_cid(card); |
976 | } | |
7ea239d9 | 977 | |
3d705d14 SH |
978 | /* |
979 | * handling only for cards supporting DSR and hosts requesting | |
980 | * DSR configuration | |
981 | */ | |
982 | if (card->csd.dsr_imp && host->dsr_req) | |
983 | mmc_set_dsr(host); | |
984 | ||
7ea239d9 | 985 | /* |
6abaa0c9 | 986 | * Select card, as all following commands rely on that. |
7ea239d9 | 987 | */ |
af517150 DB |
988 | if (!mmc_host_is_spi(host)) { |
989 | err = mmc_select_card(card); | |
990 | if (err) | |
7fca9675 | 991 | goto free_card; |
6abaa0c9 | 992 | } |
1addfcdb | 993 | |
71578a1e MM |
994 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
995 | if (err) | |
996 | goto free_card; | |
9d9f25c0 | 997 | |
d6d50a15 AN |
998 | /* Initialization sequence for UHS-I cards */ |
999 | if (rocr & SD_ROCR_S18A) { | |
1000 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 1001 | if (err) |
7ea239d9 | 1002 | goto free_card; |
d6d50a15 AN |
1003 | } else { |
1004 | /* | |
1005 | * Attempt to change to high-speed (if supported) | |
1006 | */ | |
1007 | err = mmc_sd_switch_hs(card); | |
1008 | if (err > 0) | |
cdc99179 | 1009 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
1010 | else if (err) |
1011 | goto free_card; | |
1012 | ||
1013 | /* | |
1014 | * Set bus speed. | |
1015 | */ | |
1016 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 1017 | |
d6d50a15 AN |
1018 | /* |
1019 | * Switch to wider bus (if supported). | |
1020 | */ | |
1021 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
1022 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
1023 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
1024 | if (err) | |
1025 | goto free_card; | |
1026 | ||
1027 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1028 | } | |
7ea239d9 PO |
1029 | } |
1030 | ||
71578a1e | 1031 | host->card = card; |
17b0429d | 1032 | return 0; |
6abaa0c9 PO |
1033 | |
1034 | free_card: | |
1035 | if (!oldcard) | |
1036 | mmc_remove_card(card); | |
6abaa0c9 | 1037 | |
adf66a0d | 1038 | return err; |
6abaa0c9 PO |
1039 | } |
1040 | ||
1041 | /* | |
1042 | * Host is being removed. Free up the current card. | |
1043 | */ | |
1044 | static void mmc_sd_remove(struct mmc_host *host) | |
1045 | { | |
1046 | BUG_ON(!host); | |
1047 | BUG_ON(!host->card); | |
1048 | ||
1049 | mmc_remove_card(host->card); | |
1050 | host->card = NULL; | |
1051 | } | |
1052 | ||
d3049504 AH |
1053 | /* |
1054 | * Card detection - card is alive. | |
1055 | */ | |
1056 | static int mmc_sd_alive(struct mmc_host *host) | |
1057 | { | |
1058 | return mmc_send_status(host->card, NULL); | |
1059 | } | |
1060 | ||
6abaa0c9 PO |
1061 | /* |
1062 | * Card detection callback from host. | |
1063 | */ | |
1064 | static void mmc_sd_detect(struct mmc_host *host) | |
1065 | { | |
1066 | int err; | |
1067 | ||
1068 | BUG_ON(!host); | |
1069 | BUG_ON(!host->card); | |
1070 | ||
e94cfef6 | 1071 | mmc_get_card(host->card); |
6abaa0c9 PO |
1072 | |
1073 | /* | |
1074 | * Just check if our card has been removed. | |
1075 | */ | |
d3049504 | 1076 | err = _mmc_detect_card_removed(host); |
7ea239d9 | 1077 | |
e94cfef6 | 1078 | mmc_put_card(host->card); |
7ea239d9 | 1079 | |
17b0429d | 1080 | if (err) { |
4101c16a | 1081 | mmc_sd_remove(host); |
6abaa0c9 PO |
1082 | |
1083 | mmc_claim_host(host); | |
1084 | mmc_detach_bus(host); | |
7f7e4129 | 1085 | mmc_power_off(host); |
6abaa0c9 PO |
1086 | mmc_release_host(host); |
1087 | } | |
1088 | } | |
1089 | ||
0cb403a2 | 1090 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1091 | { |
85e727ed JC |
1092 | int err = 0; |
1093 | ||
6abaa0c9 PO |
1094 | BUG_ON(!host); |
1095 | BUG_ON(!host->card); | |
1096 | ||
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 PO |
1138 | |
1139 | BUG_ON(!host); | |
1140 | BUG_ON(!host->card); | |
1141 | ||
1142 | mmc_claim_host(host); | |
9ec775f7 UH |
1143 | |
1144 | if (!mmc_card_suspended(host->card)) | |
1145 | goto out; | |
1146 | ||
69041150 | 1147 | mmc_power_up(host, host->card->ocr); |
69041150 | 1148 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
9ec775f7 | 1149 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1150 | |
9ec775f7 UH |
1151 | out: |
1152 | mmc_release_host(host); | |
95cdfb72 | 1153 | return err; |
6abaa0c9 PO |
1154 | } |
1155 | ||
0cb403a2 UH |
1156 | /* |
1157 | * Callback for resume | |
1158 | */ | |
1159 | static int mmc_sd_resume(struct mmc_host *host) | |
1160 | { | |
0cb403a2 | 1161 | pm_runtime_enable(&host->card->dev); |
c29536e8 | 1162 | return 0; |
0cb403a2 UH |
1163 | } |
1164 | ||
c4d770d7 UH |
1165 | /* |
1166 | * Callback for runtime_suspend. | |
1167 | */ | |
1168 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1169 | { | |
1170 | int err; | |
1171 | ||
1172 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1173 | return 0; | |
1174 | ||
0cb403a2 | 1175 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1176 | if (err) |
f42cf8d6 | 1177 | pr_err("%s: error %d doing aggressive suspend\n", |
c4d770d7 | 1178 | mmc_hostname(host), err); |
c4d770d7 | 1179 | |
c4d770d7 UH |
1180 | return err; |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Callback for runtime_resume. | |
1185 | */ | |
1186 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1187 | { | |
1188 | int err; | |
1189 | ||
0cb403a2 | 1190 | err = _mmc_sd_resume(host); |
520322d9 | 1191 | if (err && err != -ENOMEDIUM) |
c29536e8 | 1192 | pr_err("%s: error %d doing runtime resume\n", |
c4d770d7 UH |
1193 | mmc_hostname(host), err); |
1194 | ||
c4d770d7 UH |
1195 | return 0; |
1196 | } | |
1197 | ||
dc0ecfef JR |
1198 | static int mmc_sd_reset(struct mmc_host *host) |
1199 | { | |
1200 | mmc_power_cycle(host, host->card->ocr); | |
3056c49c | 1201 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
dc0ecfef JR |
1202 | } |
1203 | ||
6abaa0c9 PO |
1204 | static const struct mmc_bus_ops mmc_sd_ops = { |
1205 | .remove = mmc_sd_remove, | |
1206 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1207 | .runtime_suspend = mmc_sd_runtime_suspend, |
1208 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1209 | .suspend = mmc_sd_suspend, |
1210 | .resume = mmc_sd_resume, | |
d3049504 | 1211 | .alive = mmc_sd_alive, |
5992e786 | 1212 | .shutdown = mmc_sd_suspend, |
dc0ecfef | 1213 | .reset = mmc_sd_reset, |
6abaa0c9 PO |
1214 | }; |
1215 | ||
1216 | /* | |
1217 | * Starting point for SD card init. | |
1218 | */ | |
807e8e40 | 1219 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1220 | { |
1221 | int err; | |
69041150 | 1222 | u32 ocr, rocr; |
6abaa0c9 PO |
1223 | |
1224 | BUG_ON(!host); | |
d84075c8 | 1225 | WARN_ON(!host->claimed); |
6abaa0c9 | 1226 | |
807e8e40 AR |
1227 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1228 | if (err) | |
1229 | return err; | |
1230 | ||
2501c917 | 1231 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1232 | if (host->ocr_avail_sd) |
1233 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1234 | |
af517150 DB |
1235 | /* |
1236 | * We need to get OCR a different way for SPI. | |
1237 | */ | |
1238 | if (mmc_host_is_spi(host)) { | |
1239 | mmc_go_idle(host); | |
1240 | ||
1241 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1242 | if (err) | |
1243 | goto err; | |
1244 | } | |
1245 | ||
69041150 | 1246 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1247 | |
1248 | /* | |
1249 | * Can we support the voltage(s) of the card(s)? | |
1250 | */ | |
69041150 | 1251 | if (!rocr) { |
109b5bed | 1252 | err = -EINVAL; |
6abaa0c9 | 1253 | goto err; |
109b5bed | 1254 | } |
6abaa0c9 PO |
1255 | |
1256 | /* | |
1257 | * Detect and init the card. | |
1258 | */ | |
69041150 | 1259 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1260 | if (err) |
6abaa0c9 PO |
1261 | goto err; |
1262 | ||
1263 | mmc_release_host(host); | |
4101c16a | 1264 | err = mmc_add_card(host->card); |
7ea239d9 | 1265 | if (err) |
2986d0bf | 1266 | goto remove_card; |
7ea239d9 | 1267 | |
2860d060 | 1268 | mmc_claim_host(host); |
7ea239d9 PO |
1269 | return 0; |
1270 | ||
2986d0bf | 1271 | remove_card: |
6abaa0c9 | 1272 | mmc_remove_card(host->card); |
7ea239d9 | 1273 | host->card = NULL; |
2986d0bf | 1274 | mmc_claim_host(host); |
7ea239d9 PO |
1275 | err: |
1276 | mmc_detach_bus(host); | |
7ea239d9 | 1277 | |
a3c76eb9 | 1278 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1279 | mmc_hostname(host), err); |
1280 | ||
adf66a0d | 1281 | return err; |
7ea239d9 | 1282 | } |