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; | |
9288cac0 | 226 | int err, i; |
dfe86cba AH |
227 | u32 *ssr; |
228 | ||
229 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
6606110d JP |
230 | pr_warn("%s: card lacks mandatory SD Status function\n", |
231 | mmc_hostname(card->host)); | |
dfe86cba AH |
232 | return 0; |
233 | } | |
234 | ||
235 | ssr = kmalloc(64, GFP_KERNEL); | |
236 | if (!ssr) | |
237 | return -ENOMEM; | |
238 | ||
239 | err = mmc_app_sd_status(card, ssr); | |
240 | if (err) { | |
6606110d JP |
241 | pr_warn("%s: problem reading SD Status register\n", |
242 | mmc_hostname(card->host)); | |
dfe86cba AH |
243 | err = 0; |
244 | goto out; | |
245 | } | |
246 | ||
247 | for (i = 0; i < 16; i++) | |
248 | ssr[i] = be32_to_cpu(ssr[i]); | |
249 | ||
250 | /* | |
251 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
252 | * bitfield positions accordingly. | |
253 | */ | |
254 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); | |
9288cac0 WS |
255 | if (au) { |
256 | if (au <= 9 || card->scr.sda_spec3) { | |
257 | card->ssr.au = sd_au_size[au]; | |
258 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); | |
259 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); | |
260 | if (es && et) { | |
261 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); | |
262 | card->ssr.erase_timeout = (et * 1000) / es; | |
263 | card->ssr.erase_offset = eo * 1000; | |
264 | } | |
265 | } else { | |
6606110d JP |
266 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
267 | mmc_hostname(card->host)); | |
dfe86cba | 268 | } |
dfe86cba AH |
269 | } |
270 | out: | |
271 | kfree(ssr); | |
272 | return err; | |
273 | } | |
274 | ||
7ea239d9 | 275 | /* |
1addfcdb | 276 | * Fetches and decodes switch information |
7ea239d9 | 277 | */ |
1addfcdb | 278 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
279 | { |
280 | int err; | |
281 | u8 *status; | |
282 | ||
3373c0ae | 283 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 284 | return 0; |
3373c0ae PO |
285 | |
286 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
6606110d | 287 | pr_warn("%s: card lacks mandatory switch function, performance might suffer\n", |
3373c0ae | 288 | mmc_hostname(card->host)); |
17b0429d | 289 | return 0; |
3373c0ae PO |
290 | } |
291 | ||
17b0429d | 292 | err = -EIO; |
7ea239d9 PO |
293 | |
294 | status = kmalloc(64, GFP_KERNEL); | |
295 | if (!status) { | |
a3c76eb9 | 296 | pr_err("%s: could not allocate a buffer for " |
013909c4 AN |
297 | "switch capabilities.\n", |
298 | mmc_hostname(card->host)); | |
17b0429d | 299 | return -ENOMEM; |
7ea239d9 PO |
300 | } |
301 | ||
a39ca6ae AL |
302 | /* |
303 | * Find out the card's support bits with a mode 0 operation. | |
304 | * The argument does not matter, as the support bits do not | |
305 | * change with the arguments. | |
306 | */ | |
307 | err = mmc_sd_switch(card, 0, 0, 0, status); | |
17b0429d | 308 | if (err) { |
013909c4 AN |
309 | /* |
310 | * If the host or the card can't do the switch, | |
311 | * fail more gracefully. | |
312 | */ | |
313 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
314 | goto out; |
315 | ||
6606110d | 316 | pr_warn("%s: problem reading Bus Speed modes\n", |
3373c0ae | 317 | mmc_hostname(card->host)); |
17b0429d | 318 | err = 0; |
adf66a0d | 319 | |
7ea239d9 PO |
320 | goto out; |
321 | } | |
322 | ||
fffe5d5a QL |
323 | if (status[13] & SD_MODE_HIGH_SPEED) |
324 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; | |
f2815f68 | 325 | |
013909c4 AN |
326 | if (card->scr.sda_spec3) { |
327 | card->sw_caps.sd3_bus_mode = status[13]; | |
a39ca6ae | 328 | /* Driver Strengths supported by the card */ |
013909c4 | 329 | card->sw_caps.sd3_drv_type = status[9]; |
d9812780 | 330 | card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8; |
013909c4 | 331 | } |
7ea239d9 | 332 | |
1addfcdb PO |
333 | out: |
334 | kfree(status); | |
335 | ||
336 | return err; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Test if the card supports high-speed mode and, if so, switch to it. | |
341 | */ | |
71578a1e | 342 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
343 | { |
344 | int err; | |
345 | u8 *status; | |
346 | ||
3373c0ae | 347 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 348 | return 0; |
3373c0ae PO |
349 | |
350 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 351 | return 0; |
3373c0ae | 352 | |
1addfcdb | 353 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 354 | return 0; |
1addfcdb PO |
355 | |
356 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 357 | return 0; |
1addfcdb | 358 | |
1addfcdb PO |
359 | status = kmalloc(64, GFP_KERNEL); |
360 | if (!status) { | |
a3c76eb9 | 361 | pr_err("%s: could not allocate a buffer for " |
facba917 | 362 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 363 | return -ENOMEM; |
1addfcdb PO |
364 | } |
365 | ||
7ea239d9 | 366 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 367 | if (err) |
7ea239d9 PO |
368 | goto out; |
369 | ||
370 | if ((status[16] & 0xF) != 1) { | |
6606110d | 371 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 372 | mmc_hostname(card->host)); |
71578a1e | 373 | err = 0; |
7ea239d9 | 374 | } else { |
71578a1e | 375 | err = 1; |
7ea239d9 PO |
376 | } |
377 | ||
378 | out: | |
379 | kfree(status); | |
380 | ||
381 | return err; | |
382 | } | |
383 | ||
d6d50a15 AN |
384 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
385 | { | |
fa021cef | 386 | int card_drv_type, drive_strength, drv_type; |
d6d50a15 AN |
387 | int err; |
388 | ||
3853a042 AH |
389 | card->drive_strength = 0; |
390 | ||
fa021cef | 391 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
ca8e99b3 | 392 | |
e23350b3 AH |
393 | drive_strength = mmc_select_drive_strength(card, |
394 | card->sw_caps.uhs_max_dtr, | |
395 | card_drv_type, &drv_type); | |
d6d50a15 | 396 | |
b4f30a17 AH |
397 | if (drive_strength) { |
398 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); | |
399 | if (err) | |
400 | return err; | |
401 | if ((status[15] & 0xF) != drive_strength) { | |
402 | pr_warn("%s: Problem setting drive strength!\n", | |
403 | mmc_hostname(card->host)); | |
404 | return 0; | |
405 | } | |
3853a042 | 406 | card->drive_strength = drive_strength; |
d6d50a15 AN |
407 | } |
408 | ||
b4f30a17 AH |
409 | if (drv_type) |
410 | mmc_set_driver_type(card->host, drv_type); | |
d6d50a15 AN |
411 | |
412 | return 0; | |
413 | } | |
414 | ||
93c712f9 | 415 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 416 | { |
49c468fc AN |
417 | /* |
418 | * If the host doesn't support any of the UHS-I modes, fallback on | |
419 | * default speed. | |
420 | */ | |
3f8a7fab | 421 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
422 | card->sd_bus_speed = 0; |
423 | return; | |
424 | } | |
49c468fc AN |
425 | |
426 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
427 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 428 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
429 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
430 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 431 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
432 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
433 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
434 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 435 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
436 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
437 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
438 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 439 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
440 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
441 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
442 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
443 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
444 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
445 | } | |
446 | } | |
447 | ||
448 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
449 | { | |
450 | int err; | |
451 | unsigned int timing = 0; | |
452 | ||
453 | switch (card->sd_bus_speed) { | |
454 | case UHS_SDR104_BUS_SPEED: | |
455 | timing = MMC_TIMING_UHS_SDR104; | |
456 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
457 | break; | |
458 | case UHS_DDR50_BUS_SPEED: | |
459 | timing = MMC_TIMING_UHS_DDR50; | |
460 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
461 | break; | |
462 | case UHS_SDR50_BUS_SPEED: | |
463 | timing = MMC_TIMING_UHS_SDR50; | |
464 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
465 | break; | |
466 | case UHS_SDR25_BUS_SPEED: | |
467 | timing = MMC_TIMING_UHS_SDR25; | |
468 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
469 | break; | |
470 | case UHS_SDR12_BUS_SPEED: | |
471 | timing = MMC_TIMING_UHS_SDR12; | |
472 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
473 | break; | |
474 | default: | |
475 | return 0; | |
49c468fc AN |
476 | } |
477 | ||
93c712f9 | 478 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
479 | if (err) |
480 | return err; | |
481 | ||
93c712f9 | 482 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 483 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
484 | mmc_hostname(card->host)); |
485 | else { | |
486 | mmc_set_timing(card->host, timing); | |
487 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
488 | } | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
55c4665e AL |
493 | /* Get host's max current setting at its current voltage */ |
494 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
495 | { | |
496 | u32 voltage, max_current; | |
497 | ||
498 | voltage = 1 << host->ios.vdd; | |
499 | switch (voltage) { | |
500 | case MMC_VDD_165_195: | |
501 | max_current = host->max_current_180; | |
502 | break; | |
503 | case MMC_VDD_29_30: | |
504 | case MMC_VDD_30_31: | |
505 | max_current = host->max_current_300; | |
506 | break; | |
507 | case MMC_VDD_32_33: | |
508 | case MMC_VDD_33_34: | |
509 | max_current = host->max_current_330; | |
510 | break; | |
511 | default: | |
512 | max_current = 0; | |
513 | } | |
514 | ||
515 | return max_current; | |
516 | } | |
517 | ||
5371c927 AN |
518 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
519 | { | |
0aa67700 | 520 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 521 | int err; |
55c4665e | 522 | u32 max_current; |
5371c927 AN |
523 | |
524 | /* | |
525 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
526 | * bus speed modes. For other bus speed modes, we do not change the |
527 | * current limit. | |
55c4665e AL |
528 | */ |
529 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
530 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
531 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
532 | return 0; | |
533 | ||
534 | /* | |
535 | * Host has different current capabilities when operating at | |
536 | * different voltages, so find out its max current first. | |
537 | */ | |
538 | max_current = sd_get_host_max_current(card->host); | |
539 | ||
540 | /* | |
a39ca6ae AL |
541 | * We only check host's capability here, if we set a limit that is |
542 | * higher than the card's maximum current, the card will be using its | |
543 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
544 | * when we set current limit to 200ma, the card will draw 200ma, and | |
545 | * when we set current limit to 400/600/800ma, the card will draw its | |
546 | * maximum 300ma from the host. | |
d9812780 RK |
547 | * |
548 | * The above is incorrect: if we try to set a current limit that is | |
549 | * not supported by the card, the card can rightfully error out the | |
550 | * attempt, and remain at the default current limit. This results | |
551 | * in a 300mA card being limited to 200mA even though the host | |
552 | * supports 800mA. Failures seen with SanDisk 8GB UHS cards with | |
553 | * an iMX6 host. --rmk | |
5371c927 | 554 | */ |
d9812780 RK |
555 | if (max_current >= 800 && |
556 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
55c4665e | 557 | current_limit = SD_SET_CURRENT_LIMIT_800; |
d9812780 RK |
558 | else if (max_current >= 600 && |
559 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
55c4665e | 560 | current_limit = SD_SET_CURRENT_LIMIT_600; |
d9812780 RK |
561 | else if (max_current >= 400 && |
562 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
55c4665e | 563 | current_limit = SD_SET_CURRENT_LIMIT_400; |
d9812780 RK |
564 | else if (max_current >= 200 && |
565 | card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
55c4665e | 566 | current_limit = SD_SET_CURRENT_LIMIT_200; |
5371c927 | 567 | |
0aa67700 PR |
568 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
569 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
570 | if (err) | |
571 | return err; | |
5371c927 | 572 | |
0aa67700 | 573 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 574 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 575 | mmc_hostname(card->host)); |
5371c927 | 576 | |
0aa67700 | 577 | } |
a39ca6ae | 578 | |
5371c927 AN |
579 | return 0; |
580 | } | |
581 | ||
d6d50a15 AN |
582 | /* |
583 | * UHS-I specific initialization procedure | |
584 | */ | |
585 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
586 | { | |
587 | int err; | |
588 | u8 *status; | |
589 | ||
590 | if (!card->scr.sda_spec3) | |
591 | return 0; | |
592 | ||
593 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
594 | return 0; | |
595 | ||
596 | status = kmalloc(64, GFP_KERNEL); | |
597 | if (!status) { | |
a3c76eb9 | 598 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
599 | "switch capabilities.\n", mmc_hostname(card->host)); |
600 | return -ENOMEM; | |
601 | } | |
602 | ||
603 | /* Set 4-bit bus width */ | |
604 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
605 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
606 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
607 | if (err) | |
608 | goto out; | |
609 | ||
610 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
611 | } | |
612 | ||
93c712f9 SJ |
613 | /* |
614 | * Select the bus speed mode depending on host | |
615 | * and card capability. | |
616 | */ | |
617 | sd_update_bus_speed_mode(card); | |
618 | ||
d6d50a15 AN |
619 | /* Set the driver strength for the card */ |
620 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
621 | if (err) |
622 | goto out; | |
623 | ||
93c712f9 SJ |
624 | /* Set current limit for the card */ |
625 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
626 | if (err) |
627 | goto out; | |
628 | ||
93c712f9 SJ |
629 | /* Set bus speed mode of the card */ |
630 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
631 | if (err) |
632 | goto out; | |
633 | ||
810e08ee FS |
634 | /* |
635 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
636 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
637 | */ | |
63e415c6 | 638 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
639 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
640 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || | |
641 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { | |
63e415c6 | 642 | err = mmc_execute_tuning(card); |
4324f6de WY |
643 | |
644 | /* | |
645 | * As SD Specifications Part1 Physical Layer Specification | |
646 | * Version 3.01 says, CMD19 tuning is available for unlocked | |
647 | * cards in transfer state of 1.8V signaling mode. The small | |
648 | * difference between v3.00 and 3.01 spec means that CMD19 | |
649 | * tuning is also available for DDR50 mode. | |
650 | */ | |
e10c3219 | 651 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
4324f6de WY |
652 | pr_warn("%s: ddr50 tuning failed\n", |
653 | mmc_hostname(card->host)); | |
654 | err = 0; | |
655 | } | |
656 | } | |
657 | ||
d6d50a15 AN |
658 | out: |
659 | kfree(status); | |
660 | ||
661 | return err; | |
662 | } | |
663 | ||
51ec92e2 PO |
664 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
665 | card->raw_cid[2], card->raw_cid[3]); | |
666 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
667 | card->raw_csd[2], card->raw_csd[3]); | |
668 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
669 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
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, | |
701 | &dev_attr_date.attr, | |
dfe86cba AH |
702 | &dev_attr_erase_size.attr, |
703 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
704 | &dev_attr_fwrev.attr, |
705 | &dev_attr_hwrev.attr, | |
706 | &dev_attr_manfid.attr, | |
707 | &dev_attr_name.attr, | |
708 | &dev_attr_oemid.attr, | |
709 | &dev_attr_serial.attr, | |
5fb06af7 | 710 | &dev_attr_ocr.attr, |
6825a606 | 711 | &dev_attr_dsr.attr, |
51ec92e2 PO |
712 | NULL, |
713 | }; | |
d1e58212 | 714 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 715 | |
71578a1e | 716 | struct device_type sd_type = { |
d1e58212 | 717 | .groups = sd_std_groups, |
51ec92e2 PO |
718 | }; |
719 | ||
7ea239d9 | 720 | /* |
71578a1e | 721 | * Fetch CID from card. |
7ea239d9 | 722 | */ |
d6d50a15 | 723 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 724 | { |
7ea239d9 | 725 | int err; |
55c4665e | 726 | u32 max_current; |
0797e5f1 | 727 | int retries = 10; |
69041150 | 728 | u32 pocr = ocr; |
0797e5f1 JR |
729 | |
730 | try_again: | |
731 | if (!retries) { | |
732 | ocr &= ~SD_OCR_S18R; | |
6606110d | 733 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 734 | } |
7ea239d9 | 735 | |
7ea239d9 PO |
736 | /* |
737 | * Since we're changing the OCR value, we seem to | |
738 | * need to tell some cards to go back to the idle | |
739 | * state. We wait 1ms to give cards time to | |
740 | * respond. | |
741 | */ | |
742 | mmc_go_idle(host); | |
743 | ||
744 | /* | |
745 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
746 | * compliant card and we should set bit 30 | |
747 | * of the ocr to indicate that we can handle | |
748 | * block-addressed SDHC cards. | |
749 | */ | |
6abaa0c9 | 750 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 751 | if (!err) |
f2119df6 | 752 | ocr |= SD_OCR_CCS; |
7ea239d9 | 753 | |
f2119df6 AN |
754 | /* |
755 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
756 | * to switch to 1.8V signaling level. If the card has failed |
757 | * repeatedly to switch however, skip this. | |
f2119df6 | 758 | */ |
0797e5f1 | 759 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
760 | ocr |= SD_OCR_S18R; |
761 | ||
55c4665e AL |
762 | /* |
763 | * If the host can supply more than 150mA at current voltage, | |
764 | * XPC should be set to 1. | |
765 | */ | |
766 | max_current = sd_get_host_max_current(host); | |
767 | if (max_current > 150) | |
f2119df6 AN |
768 | ocr |= SD_OCR_XPC; |
769 | ||
d6d50a15 | 770 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 771 | if (err) |
71578a1e | 772 | return err; |
7ea239d9 | 773 | |
f2119df6 AN |
774 | /* |
775 | * In case CCS and S18A in the response is set, start Signal Voltage | |
776 | * Switch procedure. SPI mode doesn't support CMD11. | |
777 | */ | |
d6d50a15 AN |
778 | if (!mmc_host_is_spi(host) && rocr && |
779 | ((*rocr & 0x41000000) == 0x41000000)) { | |
0f791fda | 780 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
69041150 | 781 | pocr); |
0797e5f1 JR |
782 | if (err == -EAGAIN) { |
783 | retries--; | |
784 | goto try_again; | |
785 | } else if (err) { | |
786 | retries = 0; | |
f2119df6 AN |
787 | goto try_again; |
788 | } | |
789 | } | |
790 | ||
af517150 DB |
791 | if (mmc_host_is_spi(host)) |
792 | err = mmc_send_cid(host, cid); | |
793 | else | |
794 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
795 | |
796 | return err; | |
797 | } | |
798 | ||
799 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
800 | { | |
801 | int err; | |
802 | ||
803 | /* | |
804 | * Fetch CSD from card. | |
805 | */ | |
806 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 807 | if (err) |
71578a1e | 808 | return err; |
7ea239d9 | 809 | |
71578a1e MM |
810 | err = mmc_decode_csd(card); |
811 | if (err) | |
812 | return err; | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
9f6e0bff LPC |
817 | static int mmc_sd_get_ro(struct mmc_host *host) |
818 | { | |
819 | int ro; | |
820 | ||
821 | /* | |
822 | * Some systems don't feature a write-protect pin and don't need one. | |
823 | * E.g. because they only have micro-SD card slot. For those systems | |
824 | * assume that the SD card is always read-write. | |
825 | */ | |
826 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) | |
827 | return 0; | |
828 | ||
829 | if (!host->ops->get_ro) | |
830 | return -1; | |
831 | ||
9f6e0bff | 832 | ro = host->ops->get_ro(host); |
9f6e0bff LPC |
833 | |
834 | return ro; | |
835 | } | |
836 | ||
71578a1e MM |
837 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
838 | bool reinit) | |
839 | { | |
840 | int err; | |
841 | ||
842 | if (!reinit) { | |
843 | /* | |
844 | * Fetch SCR from card. | |
845 | */ | |
846 | err = mmc_app_send_scr(card, card->raw_scr); | |
847 | if (err) | |
848 | return err; | |
849 | ||
850 | err = mmc_decode_scr(card); | |
851 | if (err) | |
852 | return err; | |
853 | ||
dfe86cba AH |
854 | /* |
855 | * Fetch and process SD Status register. | |
856 | */ | |
857 | err = mmc_read_ssr(card); | |
858 | if (err) | |
859 | return err; | |
860 | ||
861 | /* Erase init depends on CSD and SSR */ | |
862 | mmc_init_erase(card); | |
863 | ||
71578a1e MM |
864 | /* |
865 | * Fetch switch information from card. | |
866 | */ | |
867 | err = mmc_read_switch(card); | |
868 | if (err) | |
869 | return err; | |
870 | } | |
871 | ||
872 | /* | |
873 | * For SPI, enable CRC as appropriate. | |
874 | * This CRC enable is located AFTER the reading of the | |
875 | * card registers because some SDHC cards are not able | |
876 | * to provide valid CRCs for non-512-byte blocks. | |
877 | */ | |
878 | if (mmc_host_is_spi(host)) { | |
879 | err = mmc_spi_set_crc(host, use_spi_crc); | |
880 | if (err) | |
881 | return err; | |
882 | } | |
883 | ||
884 | /* | |
885 | * Check if read-only switch is active. | |
886 | */ | |
887 | if (!reinit) { | |
9f6e0bff | 888 | int ro = mmc_sd_get_ro(host); |
71578a1e MM |
889 | |
890 | if (ro < 0) { | |
6606110d | 891 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
892 | mmc_hostname(host)); |
893 | } else if (ro > 0) { | |
894 | mmc_card_set_readonly(card); | |
adf66a0d | 895 | } |
71578a1e MM |
896 | } |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
902 | { | |
903 | unsigned max_dtr = (unsigned int)-1; | |
904 | ||
cdc99179 | 905 | if (mmc_card_hs(card)) { |
71578a1e MM |
906 | if (max_dtr > card->sw_caps.hs_max_dtr) |
907 | max_dtr = card->sw_caps.hs_max_dtr; | |
908 | } else if (max_dtr > card->csd.max_dtr) { | |
909 | max_dtr = card->csd.max_dtr; | |
910 | } | |
911 | ||
912 | return max_dtr; | |
913 | } | |
914 | ||
71578a1e MM |
915 | /* |
916 | * Handle the detection and initialisation of a card. | |
917 | * | |
918 | * In the case of a resume, "oldcard" will contain the card | |
919 | * we're trying to reinitialise. | |
920 | */ | |
921 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
922 | struct mmc_card *oldcard) | |
923 | { | |
924 | struct mmc_card *card; | |
925 | int err; | |
926 | u32 cid[4]; | |
d6d50a15 | 927 | u32 rocr = 0; |
71578a1e MM |
928 | |
929 | BUG_ON(!host); | |
930 | WARN_ON(!host->claimed); | |
931 | ||
d6d50a15 | 932 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
933 | if (err) |
934 | return err; | |
935 | ||
936 | if (oldcard) { | |
937 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
938 | return -ENOENT; | |
7ea239d9 | 939 | |
6abaa0c9 PO |
940 | card = oldcard; |
941 | } else { | |
942 | /* | |
943 | * Allocate card structure. | |
944 | */ | |
51ec92e2 | 945 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
946 | if (IS_ERR(card)) |
947 | return PTR_ERR(card); | |
6abaa0c9 | 948 | |
69041150 | 949 | card->ocr = ocr; |
6abaa0c9 PO |
950 | card->type = MMC_TYPE_SD; |
951 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
952 | } | |
7ea239d9 | 953 | |
eac86321 DA |
954 | /* |
955 | * Call the optional HC's init_card function to handle quirks. | |
956 | */ | |
957 | if (host->ops->init_card) | |
958 | host->ops->init_card(host, card); | |
959 | ||
7ea239d9 | 960 | /* |
af517150 | 961 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 962 | */ |
af517150 DB |
963 | if (!mmc_host_is_spi(host)) { |
964 | err = mmc_send_relative_addr(host, &card->rca); | |
965 | if (err) | |
7fca9675 | 966 | goto free_card; |
af517150 | 967 | } |
7ea239d9 | 968 | |
6abaa0c9 | 969 | if (!oldcard) { |
71578a1e | 970 | err = mmc_sd_get_csd(host, card); |
17b0429d | 971 | if (err) |
7fca9675 | 972 | goto free_card; |
bd766312 | 973 | |
6abaa0c9 PO |
974 | mmc_decode_cid(card); |
975 | } | |
7ea239d9 | 976 | |
3d705d14 SH |
977 | /* |
978 | * handling only for cards supporting DSR and hosts requesting | |
979 | * DSR configuration | |
980 | */ | |
981 | if (card->csd.dsr_imp && host->dsr_req) | |
982 | mmc_set_dsr(host); | |
983 | ||
7ea239d9 | 984 | /* |
6abaa0c9 | 985 | * Select card, as all following commands rely on that. |
7ea239d9 | 986 | */ |
af517150 DB |
987 | if (!mmc_host_is_spi(host)) { |
988 | err = mmc_select_card(card); | |
989 | if (err) | |
7fca9675 | 990 | goto free_card; |
6abaa0c9 | 991 | } |
1addfcdb | 992 | |
71578a1e MM |
993 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
994 | if (err) | |
995 | goto free_card; | |
9d9f25c0 | 996 | |
d6d50a15 AN |
997 | /* Initialization sequence for UHS-I cards */ |
998 | if (rocr & SD_ROCR_S18A) { | |
999 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 1000 | if (err) |
7ea239d9 | 1001 | goto free_card; |
d6d50a15 AN |
1002 | } else { |
1003 | /* | |
1004 | * Attempt to change to high-speed (if supported) | |
1005 | */ | |
1006 | err = mmc_sd_switch_hs(card); | |
1007 | if (err > 0) | |
cdc99179 | 1008 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
1009 | else if (err) |
1010 | goto free_card; | |
1011 | ||
1012 | /* | |
1013 | * Set bus speed. | |
1014 | */ | |
1015 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 1016 | |
d6d50a15 AN |
1017 | /* |
1018 | * Switch to wider bus (if supported). | |
1019 | */ | |
1020 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
1021 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
1022 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
1023 | if (err) | |
1024 | goto free_card; | |
1025 | ||
1026 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1027 | } | |
7ea239d9 PO |
1028 | } |
1029 | ||
71578a1e | 1030 | host->card = card; |
17b0429d | 1031 | return 0; |
6abaa0c9 PO |
1032 | |
1033 | free_card: | |
1034 | if (!oldcard) | |
1035 | mmc_remove_card(card); | |
6abaa0c9 | 1036 | |
adf66a0d | 1037 | return err; |
6abaa0c9 PO |
1038 | } |
1039 | ||
1040 | /* | |
1041 | * Host is being removed. Free up the current card. | |
1042 | */ | |
1043 | static void mmc_sd_remove(struct mmc_host *host) | |
1044 | { | |
1045 | BUG_ON(!host); | |
1046 | BUG_ON(!host->card); | |
1047 | ||
1048 | mmc_remove_card(host->card); | |
1049 | host->card = NULL; | |
1050 | } | |
1051 | ||
d3049504 AH |
1052 | /* |
1053 | * Card detection - card is alive. | |
1054 | */ | |
1055 | static int mmc_sd_alive(struct mmc_host *host) | |
1056 | { | |
1057 | return mmc_send_status(host->card, NULL); | |
1058 | } | |
1059 | ||
6abaa0c9 PO |
1060 | /* |
1061 | * Card detection callback from host. | |
1062 | */ | |
1063 | static void mmc_sd_detect(struct mmc_host *host) | |
1064 | { | |
1065 | int err; | |
1066 | ||
1067 | BUG_ON(!host); | |
1068 | BUG_ON(!host->card); | |
1069 | ||
e94cfef6 | 1070 | mmc_get_card(host->card); |
6abaa0c9 PO |
1071 | |
1072 | /* | |
1073 | * Just check if our card has been removed. | |
1074 | */ | |
d3049504 | 1075 | err = _mmc_detect_card_removed(host); |
7ea239d9 | 1076 | |
e94cfef6 | 1077 | mmc_put_card(host->card); |
7ea239d9 | 1078 | |
17b0429d | 1079 | if (err) { |
4101c16a | 1080 | mmc_sd_remove(host); |
6abaa0c9 PO |
1081 | |
1082 | mmc_claim_host(host); | |
1083 | mmc_detach_bus(host); | |
7f7e4129 | 1084 | mmc_power_off(host); |
6abaa0c9 PO |
1085 | mmc_release_host(host); |
1086 | } | |
1087 | } | |
1088 | ||
0cb403a2 | 1089 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1090 | { |
85e727ed JC |
1091 | int err = 0; |
1092 | ||
6abaa0c9 PO |
1093 | BUG_ON(!host); |
1094 | BUG_ON(!host->card); | |
1095 | ||
1096 | mmc_claim_host(host); | |
9ec775f7 UH |
1097 | |
1098 | if (mmc_card_suspended(host->card)) | |
1099 | goto out; | |
1100 | ||
af517150 | 1101 | if (!mmc_host_is_spi(host)) |
85e727ed | 1102 | err = mmc_deselect_cards(host); |
cdc99179 | 1103 | |
9ec775f7 | 1104 | if (!err) { |
74590263 | 1105 | mmc_power_off(host); |
9ec775f7 UH |
1106 | mmc_card_set_suspended(host->card); |
1107 | } | |
95cdfb72 | 1108 | |
9ec775f7 UH |
1109 | out: |
1110 | mmc_release_host(host); | |
85e727ed | 1111 | return err; |
6abaa0c9 PO |
1112 | } |
1113 | ||
1114 | /* | |
0cb403a2 UH |
1115 | * Callback for suspend |
1116 | */ | |
1117 | static int mmc_sd_suspend(struct mmc_host *host) | |
1118 | { | |
1119 | int err; | |
1120 | ||
1121 | err = _mmc_sd_suspend(host); | |
1122 | if (!err) { | |
1123 | pm_runtime_disable(&host->card->dev); | |
1124 | pm_runtime_set_suspended(&host->card->dev); | |
1125 | } | |
1126 | ||
1127 | return err; | |
1128 | } | |
1129 | ||
1130 | /* | |
6abaa0c9 PO |
1131 | * This function tries to determine if the same card is still present |
1132 | * and, if so, restore all state to it. | |
1133 | */ | |
0cb403a2 | 1134 | static int _mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 | 1135 | { |
9ec775f7 | 1136 | int err = 0; |
6abaa0c9 PO |
1137 | |
1138 | BUG_ON(!host); | |
1139 | BUG_ON(!host->card); | |
1140 | ||
1141 | mmc_claim_host(host); | |
9ec775f7 UH |
1142 | |
1143 | if (!mmc_card_suspended(host->card)) | |
1144 | goto out; | |
1145 | ||
69041150 | 1146 | mmc_power_up(host, host->card->ocr); |
69041150 | 1147 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
9ec775f7 | 1148 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1149 | |
9ec775f7 UH |
1150 | out: |
1151 | mmc_release_host(host); | |
95cdfb72 | 1152 | return err; |
6abaa0c9 PO |
1153 | } |
1154 | ||
0cb403a2 UH |
1155 | /* |
1156 | * Callback for resume | |
1157 | */ | |
1158 | static int mmc_sd_resume(struct mmc_host *host) | |
1159 | { | |
0cb403a2 | 1160 | pm_runtime_enable(&host->card->dev); |
c29536e8 | 1161 | return 0; |
0cb403a2 UH |
1162 | } |
1163 | ||
c4d770d7 UH |
1164 | /* |
1165 | * Callback for runtime_suspend. | |
1166 | */ | |
1167 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1168 | { | |
1169 | int err; | |
1170 | ||
1171 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1172 | return 0; | |
1173 | ||
0cb403a2 | 1174 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1175 | if (err) |
f42cf8d6 | 1176 | pr_err("%s: error %d doing aggressive suspend\n", |
c4d770d7 | 1177 | mmc_hostname(host), err); |
c4d770d7 | 1178 | |
c4d770d7 UH |
1179 | return err; |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * Callback for runtime_resume. | |
1184 | */ | |
1185 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1186 | { | |
1187 | int err; | |
1188 | ||
0cb403a2 | 1189 | err = _mmc_sd_resume(host); |
520322d9 | 1190 | if (err && err != -ENOMEDIUM) |
c29536e8 | 1191 | pr_err("%s: error %d doing runtime resume\n", |
c4d770d7 UH |
1192 | mmc_hostname(host), err); |
1193 | ||
c4d770d7 UH |
1194 | return 0; |
1195 | } | |
1196 | ||
dc0ecfef JR |
1197 | static int mmc_sd_reset(struct mmc_host *host) |
1198 | { | |
1199 | mmc_power_cycle(host, host->card->ocr); | |
3056c49c | 1200 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
dc0ecfef JR |
1201 | } |
1202 | ||
6abaa0c9 PO |
1203 | static const struct mmc_bus_ops mmc_sd_ops = { |
1204 | .remove = mmc_sd_remove, | |
1205 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1206 | .runtime_suspend = mmc_sd_runtime_suspend, |
1207 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1208 | .suspend = mmc_sd_suspend, |
1209 | .resume = mmc_sd_resume, | |
d3049504 | 1210 | .alive = mmc_sd_alive, |
5992e786 | 1211 | .shutdown = mmc_sd_suspend, |
dc0ecfef | 1212 | .reset = mmc_sd_reset, |
6abaa0c9 PO |
1213 | }; |
1214 | ||
1215 | /* | |
1216 | * Starting point for SD card init. | |
1217 | */ | |
807e8e40 | 1218 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1219 | { |
1220 | int err; | |
69041150 | 1221 | u32 ocr, rocr; |
6abaa0c9 PO |
1222 | |
1223 | BUG_ON(!host); | |
d84075c8 | 1224 | WARN_ON(!host->claimed); |
6abaa0c9 | 1225 | |
807e8e40 AR |
1226 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1227 | if (err) | |
1228 | return err; | |
1229 | ||
2501c917 | 1230 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1231 | if (host->ocr_avail_sd) |
1232 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1233 | |
af517150 DB |
1234 | /* |
1235 | * We need to get OCR a different way for SPI. | |
1236 | */ | |
1237 | if (mmc_host_is_spi(host)) { | |
1238 | mmc_go_idle(host); | |
1239 | ||
1240 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1241 | if (err) | |
1242 | goto err; | |
1243 | } | |
1244 | ||
69041150 | 1245 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1246 | |
1247 | /* | |
1248 | * Can we support the voltage(s) of the card(s)? | |
1249 | */ | |
69041150 | 1250 | if (!rocr) { |
109b5bed | 1251 | err = -EINVAL; |
6abaa0c9 | 1252 | goto err; |
109b5bed | 1253 | } |
6abaa0c9 PO |
1254 | |
1255 | /* | |
1256 | * Detect and init the card. | |
1257 | */ | |
69041150 | 1258 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1259 | if (err) |
6abaa0c9 PO |
1260 | goto err; |
1261 | ||
1262 | mmc_release_host(host); | |
4101c16a | 1263 | err = mmc_add_card(host->card); |
7ea239d9 | 1264 | if (err) |
2986d0bf | 1265 | goto remove_card; |
7ea239d9 | 1266 | |
2860d060 | 1267 | mmc_claim_host(host); |
7ea239d9 PO |
1268 | return 0; |
1269 | ||
2986d0bf | 1270 | remove_card: |
6abaa0c9 | 1271 | mmc_remove_card(host->card); |
7ea239d9 | 1272 | host->card = NULL; |
2986d0bf | 1273 | mmc_claim_host(host); |
7ea239d9 PO |
1274 | err: |
1275 | mmc_detach_bus(host); | |
7ea239d9 | 1276 | |
a3c76eb9 | 1277 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1278 | mmc_hostname(host), err); |
1279 | ||
adf66a0d | 1280 | return err; |
7ea239d9 | 1281 | } |