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 | ||
77 | memset(&card->cid, 0, sizeof(struct mmc_cid)); | |
78 | ||
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; | |
9288cac0 | 228 | int err, i; |
dfe86cba AH |
229 | u32 *ssr; |
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 | ||
237 | ssr = kmalloc(64, GFP_KERNEL); | |
238 | if (!ssr) | |
239 | return -ENOMEM; | |
240 | ||
241 | err = mmc_app_sd_status(card, ssr); | |
242 | if (err) { | |
6606110d JP |
243 | pr_warn("%s: problem reading SD Status register\n", |
244 | mmc_hostname(card->host)); | |
dfe86cba AH |
245 | err = 0; |
246 | goto out; | |
247 | } | |
248 | ||
249 | for (i = 0; i < 16; i++) | |
250 | ssr[i] = be32_to_cpu(ssr[i]); | |
251 | ||
252 | /* | |
253 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
254 | * bitfield positions accordingly. | |
255 | */ | |
256 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); | |
9288cac0 WS |
257 | if (au) { |
258 | if (au <= 9 || card->scr.sda_spec3) { | |
259 | card->ssr.au = sd_au_size[au]; | |
260 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); | |
261 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); | |
262 | if (es && et) { | |
263 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); | |
264 | card->ssr.erase_timeout = (et * 1000) / es; | |
265 | card->ssr.erase_offset = eo * 1000; | |
266 | } | |
267 | } else { | |
6606110d JP |
268 | pr_warn("%s: SD Status: Invalid Allocation Unit size\n", |
269 | mmc_hostname(card->host)); | |
dfe86cba | 270 | } |
dfe86cba AH |
271 | } |
272 | out: | |
273 | kfree(ssr); | |
274 | return err; | |
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]; |
013909c4 | 332 | } |
7ea239d9 | 333 | |
1addfcdb PO |
334 | out: |
335 | kfree(status); | |
336 | ||
337 | return err; | |
338 | } | |
339 | ||
340 | /* | |
341 | * Test if the card supports high-speed mode and, if so, switch to it. | |
342 | */ | |
71578a1e | 343 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
344 | { |
345 | int err; | |
346 | u8 *status; | |
347 | ||
3373c0ae | 348 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 349 | return 0; |
3373c0ae PO |
350 | |
351 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 352 | return 0; |
3373c0ae | 353 | |
1addfcdb | 354 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 355 | return 0; |
1addfcdb PO |
356 | |
357 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 358 | return 0; |
1addfcdb | 359 | |
1addfcdb PO |
360 | status = kmalloc(64, GFP_KERNEL); |
361 | if (!status) { | |
a3c76eb9 | 362 | pr_err("%s: could not allocate a buffer for " |
facba917 | 363 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 364 | return -ENOMEM; |
1addfcdb PO |
365 | } |
366 | ||
7ea239d9 | 367 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 368 | if (err) |
7ea239d9 PO |
369 | goto out; |
370 | ||
371 | if ((status[16] & 0xF) != 1) { | |
6606110d | 372 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 373 | mmc_hostname(card->host)); |
71578a1e | 374 | err = 0; |
7ea239d9 | 375 | } else { |
71578a1e | 376 | err = 1; |
7ea239d9 PO |
377 | } |
378 | ||
379 | out: | |
380 | kfree(status); | |
381 | ||
382 | return err; | |
383 | } | |
384 | ||
d6d50a15 AN |
385 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
386 | { | |
fa021cef | 387 | int card_drv_type, drive_strength, drv_type; |
d6d50a15 AN |
388 | int err; |
389 | ||
3853a042 AH |
390 | card->drive_strength = 0; |
391 | ||
fa021cef | 392 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
ca8e99b3 | 393 | |
e23350b3 AH |
394 | drive_strength = mmc_select_drive_strength(card, |
395 | card->sw_caps.uhs_max_dtr, | |
396 | card_drv_type, &drv_type); | |
d6d50a15 | 397 | |
b4f30a17 AH |
398 | if (drive_strength) { |
399 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); | |
400 | if (err) | |
401 | return err; | |
402 | if ((status[15] & 0xF) != drive_strength) { | |
403 | pr_warn("%s: Problem setting drive strength!\n", | |
404 | mmc_hostname(card->host)); | |
405 | return 0; | |
406 | } | |
3853a042 | 407 | card->drive_strength = drive_strength; |
d6d50a15 AN |
408 | } |
409 | ||
b4f30a17 AH |
410 | if (drv_type) |
411 | mmc_set_driver_type(card->host, drv_type); | |
d6d50a15 AN |
412 | |
413 | return 0; | |
414 | } | |
415 | ||
93c712f9 | 416 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 417 | { |
49c468fc AN |
418 | /* |
419 | * If the host doesn't support any of the UHS-I modes, fallback on | |
420 | * default speed. | |
421 | */ | |
3f8a7fab | 422 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
423 | card->sd_bus_speed = 0; |
424 | return; | |
425 | } | |
49c468fc AN |
426 | |
427 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
428 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 429 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
430 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
431 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 432 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
433 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
434 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
435 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 436 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
437 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
438 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
439 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 440 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
441 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
442 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
443 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
444 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
445 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
446 | } | |
447 | } | |
448 | ||
449 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
450 | { | |
451 | int err; | |
452 | unsigned int timing = 0; | |
453 | ||
454 | switch (card->sd_bus_speed) { | |
455 | case UHS_SDR104_BUS_SPEED: | |
456 | timing = MMC_TIMING_UHS_SDR104; | |
457 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
458 | break; | |
459 | case UHS_DDR50_BUS_SPEED: | |
460 | timing = MMC_TIMING_UHS_DDR50; | |
461 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
462 | break; | |
463 | case UHS_SDR50_BUS_SPEED: | |
464 | timing = MMC_TIMING_UHS_SDR50; | |
465 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
466 | break; | |
467 | case UHS_SDR25_BUS_SPEED: | |
468 | timing = MMC_TIMING_UHS_SDR25; | |
469 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
470 | break; | |
471 | case UHS_SDR12_BUS_SPEED: | |
472 | timing = MMC_TIMING_UHS_SDR12; | |
473 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
474 | break; | |
475 | default: | |
476 | return 0; | |
49c468fc AN |
477 | } |
478 | ||
93c712f9 | 479 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
480 | if (err) |
481 | return err; | |
482 | ||
93c712f9 | 483 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 484 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
485 | mmc_hostname(card->host)); |
486 | else { | |
487 | mmc_set_timing(card->host, timing); | |
488 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
55c4665e AL |
494 | /* Get host's max current setting at its current voltage */ |
495 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
496 | { | |
497 | u32 voltage, max_current; | |
498 | ||
499 | voltage = 1 << host->ios.vdd; | |
500 | switch (voltage) { | |
501 | case MMC_VDD_165_195: | |
502 | max_current = host->max_current_180; | |
503 | break; | |
504 | case MMC_VDD_29_30: | |
505 | case MMC_VDD_30_31: | |
506 | max_current = host->max_current_300; | |
507 | break; | |
508 | case MMC_VDD_32_33: | |
509 | case MMC_VDD_33_34: | |
510 | max_current = host->max_current_330; | |
511 | break; | |
512 | default: | |
513 | max_current = 0; | |
514 | } | |
515 | ||
516 | return max_current; | |
517 | } | |
518 | ||
5371c927 AN |
519 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
520 | { | |
0aa67700 | 521 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 522 | int err; |
55c4665e | 523 | u32 max_current; |
5371c927 AN |
524 | |
525 | /* | |
526 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
527 | * bus speed modes. For other bus speed modes, we do not change the |
528 | * current limit. | |
55c4665e AL |
529 | */ |
530 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
531 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
532 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
533 | return 0; | |
534 | ||
535 | /* | |
536 | * Host has different current capabilities when operating at | |
537 | * different voltages, so find out its max current first. | |
538 | */ | |
539 | max_current = sd_get_host_max_current(card->host); | |
540 | ||
541 | /* | |
a39ca6ae AL |
542 | * We only check host's capability here, if we set a limit that is |
543 | * higher than the card's maximum current, the card will be using its | |
544 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
545 | * when we set current limit to 200ma, the card will draw 200ma, and | |
546 | * when we set current limit to 400/600/800ma, the card will draw its | |
547 | * maximum 300ma from the host. | |
5371c927 | 548 | */ |
55c4665e AL |
549 | if (max_current >= 800) |
550 | current_limit = SD_SET_CURRENT_LIMIT_800; | |
551 | else if (max_current >= 600) | |
552 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
553 | else if (max_current >= 400) | |
554 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
555 | else if (max_current >= 200) | |
556 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
5371c927 | 557 | |
0aa67700 PR |
558 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
559 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
560 | if (err) | |
561 | return err; | |
5371c927 | 562 | |
0aa67700 | 563 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 564 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 565 | mmc_hostname(card->host)); |
5371c927 | 566 | |
0aa67700 | 567 | } |
a39ca6ae | 568 | |
5371c927 AN |
569 | return 0; |
570 | } | |
571 | ||
d6d50a15 AN |
572 | /* |
573 | * UHS-I specific initialization procedure | |
574 | */ | |
575 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
576 | { | |
577 | int err; | |
578 | u8 *status; | |
579 | ||
580 | if (!card->scr.sda_spec3) | |
581 | return 0; | |
582 | ||
583 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
584 | return 0; | |
585 | ||
586 | status = kmalloc(64, GFP_KERNEL); | |
587 | if (!status) { | |
a3c76eb9 | 588 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
589 | "switch capabilities.\n", mmc_hostname(card->host)); |
590 | return -ENOMEM; | |
591 | } | |
592 | ||
593 | /* Set 4-bit bus width */ | |
594 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
595 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
596 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
597 | if (err) | |
598 | goto out; | |
599 | ||
600 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
601 | } | |
602 | ||
93c712f9 SJ |
603 | /* |
604 | * Select the bus speed mode depending on host | |
605 | * and card capability. | |
606 | */ | |
607 | sd_update_bus_speed_mode(card); | |
608 | ||
d6d50a15 AN |
609 | /* Set the driver strength for the card */ |
610 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
611 | if (err) |
612 | goto out; | |
613 | ||
93c712f9 SJ |
614 | /* Set current limit for the card */ |
615 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
616 | if (err) |
617 | goto out; | |
618 | ||
93c712f9 SJ |
619 | /* Set bus speed mode of the card */ |
620 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
621 | if (err) |
622 | goto out; | |
623 | ||
810e08ee FS |
624 | /* |
625 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
626 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
627 | */ | |
63e415c6 | 628 | if (!mmc_host_is_spi(card->host) && |
3cafb70c CC |
629 | (card->host->ios.timing == MMC_TIMING_UHS_SDR50 || |
630 | card->host->ios.timing == MMC_TIMING_UHS_DDR50 || | |
631 | card->host->ios.timing == MMC_TIMING_UHS_SDR104)) { | |
63e415c6 | 632 | err = mmc_execute_tuning(card); |
4324f6de WY |
633 | |
634 | /* | |
635 | * As SD Specifications Part1 Physical Layer Specification | |
636 | * Version 3.01 says, CMD19 tuning is available for unlocked | |
637 | * cards in transfer state of 1.8V signaling mode. The small | |
638 | * difference between v3.00 and 3.01 spec means that CMD19 | |
639 | * tuning is also available for DDR50 mode. | |
640 | */ | |
3cafb70c | 641 | if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) { |
4324f6de WY |
642 | pr_warn("%s: ddr50 tuning failed\n", |
643 | mmc_hostname(card->host)); | |
644 | err = 0; | |
645 | } | |
646 | } | |
647 | ||
d6d50a15 AN |
648 | out: |
649 | kfree(status); | |
650 | ||
651 | return err; | |
652 | } | |
653 | ||
51ec92e2 PO |
654 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
655 | card->raw_cid[2], card->raw_cid[3]); | |
656 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
657 | card->raw_csd[2], card->raw_csd[3]); | |
658 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
659 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
660 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
661 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
662 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
663 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
664 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
665 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
666 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
667 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
668 | ||
669 | ||
670 | static struct attribute *sd_std_attrs[] = { | |
671 | &dev_attr_cid.attr, | |
672 | &dev_attr_csd.attr, | |
673 | &dev_attr_scr.attr, | |
674 | &dev_attr_date.attr, | |
dfe86cba AH |
675 | &dev_attr_erase_size.attr, |
676 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
677 | &dev_attr_fwrev.attr, |
678 | &dev_attr_hwrev.attr, | |
679 | &dev_attr_manfid.attr, | |
680 | &dev_attr_name.attr, | |
681 | &dev_attr_oemid.attr, | |
682 | &dev_attr_serial.attr, | |
683 | NULL, | |
684 | }; | |
d1e58212 | 685 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 686 | |
71578a1e | 687 | struct device_type sd_type = { |
d1e58212 | 688 | .groups = sd_std_groups, |
51ec92e2 PO |
689 | }; |
690 | ||
7ea239d9 | 691 | /* |
71578a1e | 692 | * Fetch CID from card. |
7ea239d9 | 693 | */ |
d6d50a15 | 694 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 695 | { |
7ea239d9 | 696 | int err; |
55c4665e | 697 | u32 max_current; |
0797e5f1 | 698 | int retries = 10; |
69041150 | 699 | u32 pocr = ocr; |
0797e5f1 JR |
700 | |
701 | try_again: | |
702 | if (!retries) { | |
703 | ocr &= ~SD_OCR_S18R; | |
6606110d | 704 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 705 | } |
7ea239d9 | 706 | |
7ea239d9 PO |
707 | /* |
708 | * Since we're changing the OCR value, we seem to | |
709 | * need to tell some cards to go back to the idle | |
710 | * state. We wait 1ms to give cards time to | |
711 | * respond. | |
712 | */ | |
713 | mmc_go_idle(host); | |
714 | ||
715 | /* | |
716 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
717 | * compliant card and we should set bit 30 | |
718 | * of the ocr to indicate that we can handle | |
719 | * block-addressed SDHC cards. | |
720 | */ | |
6abaa0c9 | 721 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 722 | if (!err) |
f2119df6 | 723 | ocr |= SD_OCR_CCS; |
7ea239d9 | 724 | |
f2119df6 AN |
725 | /* |
726 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
727 | * to switch to 1.8V signaling level. If the card has failed |
728 | * repeatedly to switch however, skip this. | |
f2119df6 | 729 | */ |
0797e5f1 | 730 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
731 | ocr |= SD_OCR_S18R; |
732 | ||
55c4665e AL |
733 | /* |
734 | * If the host can supply more than 150mA at current voltage, | |
735 | * XPC should be set to 1. | |
736 | */ | |
737 | max_current = sd_get_host_max_current(host); | |
738 | if (max_current > 150) | |
f2119df6 AN |
739 | ocr |= SD_OCR_XPC; |
740 | ||
d6d50a15 | 741 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 742 | if (err) |
71578a1e | 743 | return err; |
7ea239d9 | 744 | |
f2119df6 AN |
745 | /* |
746 | * In case CCS and S18A in the response is set, start Signal Voltage | |
747 | * Switch procedure. SPI mode doesn't support CMD11. | |
748 | */ | |
d6d50a15 AN |
749 | if (!mmc_host_is_spi(host) && rocr && |
750 | ((*rocr & 0x41000000) == 0x41000000)) { | |
0f791fda | 751 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
69041150 | 752 | pocr); |
0797e5f1 JR |
753 | if (err == -EAGAIN) { |
754 | retries--; | |
755 | goto try_again; | |
756 | } else if (err) { | |
757 | retries = 0; | |
f2119df6 AN |
758 | goto try_again; |
759 | } | |
760 | } | |
761 | ||
af517150 DB |
762 | if (mmc_host_is_spi(host)) |
763 | err = mmc_send_cid(host, cid); | |
764 | else | |
765 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
766 | |
767 | return err; | |
768 | } | |
769 | ||
770 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
771 | { | |
772 | int err; | |
773 | ||
774 | /* | |
775 | * Fetch CSD from card. | |
776 | */ | |
777 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 778 | if (err) |
71578a1e | 779 | return err; |
7ea239d9 | 780 | |
71578a1e MM |
781 | err = mmc_decode_csd(card); |
782 | if (err) | |
783 | return err; | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
9f6e0bff LPC |
788 | static int mmc_sd_get_ro(struct mmc_host *host) |
789 | { | |
790 | int ro; | |
791 | ||
792 | /* | |
793 | * Some systems don't feature a write-protect pin and don't need one. | |
794 | * E.g. because they only have micro-SD card slot. For those systems | |
795 | * assume that the SD card is always read-write. | |
796 | */ | |
797 | if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT) | |
798 | return 0; | |
799 | ||
800 | if (!host->ops->get_ro) | |
801 | return -1; | |
802 | ||
9f6e0bff | 803 | ro = host->ops->get_ro(host); |
9f6e0bff LPC |
804 | |
805 | return ro; | |
806 | } | |
807 | ||
71578a1e MM |
808 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, |
809 | bool reinit) | |
810 | { | |
811 | int err; | |
94d5306d SM |
812 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
813 | int retries; | |
814 | #endif | |
71578a1e MM |
815 | |
816 | if (!reinit) { | |
817 | /* | |
818 | * Fetch SCR from card. | |
819 | */ | |
820 | err = mmc_app_send_scr(card, card->raw_scr); | |
821 | if (err) | |
822 | return err; | |
823 | ||
824 | err = mmc_decode_scr(card); | |
825 | if (err) | |
826 | return err; | |
827 | ||
dfe86cba AH |
828 | /* |
829 | * Fetch and process SD Status register. | |
830 | */ | |
831 | err = mmc_read_ssr(card); | |
832 | if (err) | |
833 | return err; | |
834 | ||
835 | /* Erase init depends on CSD and SSR */ | |
836 | mmc_init_erase(card); | |
837 | ||
71578a1e MM |
838 | /* |
839 | * Fetch switch information from card. | |
840 | */ | |
94d5306d SM |
841 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
842 | for (retries = 1; retries <= 3; retries++) { | |
843 | err = mmc_read_switch(card); | |
844 | if (!err) { | |
845 | if (retries > 1) { | |
846 | printk(KERN_WARNING | |
847 | "%s: recovered\n", | |
848 | mmc_hostname(host)); | |
849 | } | |
850 | break; | |
851 | } else { | |
852 | printk(KERN_WARNING | |
853 | "%s: read switch failed (attempt %d)\n", | |
854 | mmc_hostname(host), retries); | |
855 | } | |
856 | } | |
857 | #else | |
71578a1e | 858 | err = mmc_read_switch(card); |
94d5306d SM |
859 | #endif |
860 | ||
71578a1e MM |
861 | if (err) |
862 | return err; | |
863 | } | |
864 | ||
865 | /* | |
866 | * For SPI, enable CRC as appropriate. | |
867 | * This CRC enable is located AFTER the reading of the | |
868 | * card registers because some SDHC cards are not able | |
869 | * to provide valid CRCs for non-512-byte blocks. | |
870 | */ | |
871 | if (mmc_host_is_spi(host)) { | |
872 | err = mmc_spi_set_crc(host, use_spi_crc); | |
873 | if (err) | |
874 | return err; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Check if read-only switch is active. | |
879 | */ | |
880 | if (!reinit) { | |
9f6e0bff | 881 | int ro = mmc_sd_get_ro(host); |
71578a1e MM |
882 | |
883 | if (ro < 0) { | |
6606110d | 884 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
885 | mmc_hostname(host)); |
886 | } else if (ro > 0) { | |
887 | mmc_card_set_readonly(card); | |
adf66a0d | 888 | } |
71578a1e MM |
889 | } |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
894 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
895 | { | |
896 | unsigned max_dtr = (unsigned int)-1; | |
897 | ||
cdc99179 | 898 | if (mmc_card_hs(card)) { |
71578a1e MM |
899 | if (max_dtr > card->sw_caps.hs_max_dtr) |
900 | max_dtr = card->sw_caps.hs_max_dtr; | |
901 | } else if (max_dtr > card->csd.max_dtr) { | |
902 | max_dtr = card->csd.max_dtr; | |
903 | } | |
904 | ||
905 | return max_dtr; | |
906 | } | |
907 | ||
71578a1e MM |
908 | /* |
909 | * Handle the detection and initialisation of a card. | |
910 | * | |
911 | * In the case of a resume, "oldcard" will contain the card | |
912 | * we're trying to reinitialise. | |
913 | */ | |
914 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
915 | struct mmc_card *oldcard) | |
916 | { | |
917 | struct mmc_card *card; | |
918 | int err; | |
919 | u32 cid[4]; | |
d6d50a15 | 920 | u32 rocr = 0; |
71578a1e MM |
921 | |
922 | BUG_ON(!host); | |
923 | WARN_ON(!host->claimed); | |
924 | ||
d6d50a15 | 925 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
926 | if (err) |
927 | return err; | |
928 | ||
929 | if (oldcard) { | |
930 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
931 | return -ENOENT; | |
7ea239d9 | 932 | |
6abaa0c9 PO |
933 | card = oldcard; |
934 | } else { | |
935 | /* | |
936 | * Allocate card structure. | |
937 | */ | |
51ec92e2 | 938 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
939 | if (IS_ERR(card)) |
940 | return PTR_ERR(card); | |
6abaa0c9 | 941 | |
69041150 | 942 | card->ocr = ocr; |
6abaa0c9 PO |
943 | card->type = MMC_TYPE_SD; |
944 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
945 | } | |
7ea239d9 | 946 | |
eac86321 DA |
947 | /* |
948 | * Call the optional HC's init_card function to handle quirks. | |
949 | */ | |
950 | if (host->ops->init_card) | |
951 | host->ops->init_card(host, card); | |
952 | ||
7ea239d9 | 953 | /* |
af517150 | 954 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 955 | */ |
af517150 DB |
956 | if (!mmc_host_is_spi(host)) { |
957 | err = mmc_send_relative_addr(host, &card->rca); | |
958 | if (err) | |
7fca9675 | 959 | goto free_card; |
af517150 | 960 | } |
7ea239d9 | 961 | |
6abaa0c9 | 962 | if (!oldcard) { |
71578a1e | 963 | err = mmc_sd_get_csd(host, card); |
17b0429d | 964 | if (err) |
7fca9675 | 965 | goto free_card; |
bd766312 | 966 | |
6abaa0c9 PO |
967 | mmc_decode_cid(card); |
968 | } | |
7ea239d9 | 969 | |
3d705d14 SH |
970 | /* |
971 | * handling only for cards supporting DSR and hosts requesting | |
972 | * DSR configuration | |
973 | */ | |
974 | if (card->csd.dsr_imp && host->dsr_req) | |
975 | mmc_set_dsr(host); | |
976 | ||
7ea239d9 | 977 | /* |
6abaa0c9 | 978 | * Select card, as all following commands rely on that. |
7ea239d9 | 979 | */ |
af517150 DB |
980 | if (!mmc_host_is_spi(host)) { |
981 | err = mmc_select_card(card); | |
982 | if (err) | |
7fca9675 | 983 | goto free_card; |
6abaa0c9 | 984 | } |
1addfcdb | 985 | |
71578a1e MM |
986 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
987 | if (err) | |
988 | goto free_card; | |
9d9f25c0 | 989 | |
d6d50a15 AN |
990 | /* Initialization sequence for UHS-I cards */ |
991 | if (rocr & SD_ROCR_S18A) { | |
992 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 993 | if (err) |
7ea239d9 | 994 | goto free_card; |
d6d50a15 AN |
995 | } else { |
996 | /* | |
997 | * Attempt to change to high-speed (if supported) | |
998 | */ | |
999 | err = mmc_sd_switch_hs(card); | |
1000 | if (err > 0) | |
cdc99179 | 1001 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
1002 | else if (err) |
1003 | goto free_card; | |
1004 | ||
1005 | /* | |
1006 | * Set bus speed. | |
1007 | */ | |
1008 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 1009 | |
d6d50a15 AN |
1010 | /* |
1011 | * Switch to wider bus (if supported). | |
1012 | */ | |
1013 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
1014 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
1015 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
1016 | if (err) | |
1017 | goto free_card; | |
1018 | ||
1019 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1020 | } | |
7ea239d9 PO |
1021 | } |
1022 | ||
71578a1e | 1023 | host->card = card; |
17b0429d | 1024 | return 0; |
6abaa0c9 PO |
1025 | |
1026 | free_card: | |
1027 | if (!oldcard) | |
1028 | mmc_remove_card(card); | |
6abaa0c9 | 1029 | |
adf66a0d | 1030 | return err; |
6abaa0c9 PO |
1031 | } |
1032 | ||
1033 | /* | |
1034 | * Host is being removed. Free up the current card. | |
1035 | */ | |
1036 | static void mmc_sd_remove(struct mmc_host *host) | |
1037 | { | |
1038 | BUG_ON(!host); | |
1039 | BUG_ON(!host->card); | |
1040 | ||
1041 | mmc_remove_card(host->card); | |
1042 | host->card = NULL; | |
1043 | } | |
1044 | ||
d3049504 AH |
1045 | /* |
1046 | * Card detection - card is alive. | |
1047 | */ | |
1048 | static int mmc_sd_alive(struct mmc_host *host) | |
1049 | { | |
1050 | return mmc_send_status(host->card, NULL); | |
1051 | } | |
1052 | ||
6abaa0c9 PO |
1053 | /* |
1054 | * Card detection callback from host. | |
1055 | */ | |
1056 | static void mmc_sd_detect(struct mmc_host *host) | |
1057 | { | |
2f5481a4 SM |
1058 | int err = 0; |
1059 | #ifdef CONFIG_MMC_PARANOID_SD_INIT | |
1060 | int retries = 5; | |
1061 | #endif | |
6abaa0c9 PO |
1062 | |
1063 | BUG_ON(!host); | |
1064 | BUG_ON(!host->card); | |
1065 | ||
1cac41cb MB |
1066 | if (host->ops->get_cd && host->ops->get_cd(host) == 0) { |
1067 | mmc_card_set_removed(host->card); | |
1068 | mmc_sd_remove(host); | |
1069 | ||
1070 | mmc_claim_host(host); | |
1071 | mmc_detach_bus(host); | |
1072 | mmc_power_off(host); | |
1073 | mmc_release_host(host); | |
1074 | pr_err("%s: card(tray) removed...\n", __func__); | |
1075 | return; | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Try to acquire claim host. If failed to get the lock in 2 sec, | |
1080 | * just return; This is to ensure that when this call is invoked | |
1081 | * due to pm_suspend, not to block suspend for longer duration. | |
1082 | */ | |
1083 | pm_runtime_get_sync(&host->card->dev); | |
1084 | if (!mmc_try_claim_host(host, 2000)) { | |
1085 | pm_runtime_mark_last_busy(&host->card->dev); | |
1086 | pm_runtime_put_autosuspend(&host->card->dev); | |
1087 | return; | |
1088 | } | |
6abaa0c9 PO |
1089 | |
1090 | /* | |
1091 | * Just check if our card has been removed. | |
1092 | */ | |
2f5481a4 SM |
1093 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
1094 | while(retries) { | |
1095 | err = mmc_send_status(host->card, NULL); | |
1096 | if (err) { | |
1097 | retries--; | |
1098 | udelay(5); | |
1099 | continue; | |
1100 | } | |
1101 | break; | |
1102 | } | |
1103 | if (!retries) { | |
1104 | printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n", | |
1105 | __func__, mmc_hostname(host), err); | |
1106 | } | |
1107 | #else | |
d3049504 | 1108 | err = _mmc_detect_card_removed(host); |
2f5481a4 | 1109 | #endif |
7ea239d9 | 1110 | |
e94cfef6 | 1111 | mmc_put_card(host->card); |
7ea239d9 | 1112 | |
17b0429d | 1113 | if (err) { |
4101c16a | 1114 | mmc_sd_remove(host); |
6abaa0c9 PO |
1115 | |
1116 | mmc_claim_host(host); | |
1117 | mmc_detach_bus(host); | |
7f7e4129 | 1118 | mmc_power_off(host); |
6abaa0c9 PO |
1119 | mmc_release_host(host); |
1120 | } | |
1121 | } | |
1122 | ||
0cb403a2 | 1123 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1124 | { |
85e727ed JC |
1125 | int err = 0; |
1126 | ||
6abaa0c9 PO |
1127 | BUG_ON(!host); |
1128 | BUG_ON(!host->card); | |
1129 | ||
1130 | mmc_claim_host(host); | |
9ec775f7 UH |
1131 | |
1132 | if (mmc_card_suspended(host->card)) | |
1133 | goto out; | |
1134 | ||
af517150 | 1135 | if (!mmc_host_is_spi(host)) |
85e727ed | 1136 | err = mmc_deselect_cards(host); |
cdc99179 | 1137 | |
9ec775f7 | 1138 | if (!err) { |
74590263 | 1139 | mmc_power_off(host); |
9ec775f7 UH |
1140 | mmc_card_set_suspended(host->card); |
1141 | } | |
95cdfb72 | 1142 | |
9ec775f7 UH |
1143 | out: |
1144 | mmc_release_host(host); | |
85e727ed | 1145 | return err; |
6abaa0c9 PO |
1146 | } |
1147 | ||
1148 | /* | |
0cb403a2 UH |
1149 | * Callback for suspend |
1150 | */ | |
1151 | static int mmc_sd_suspend(struct mmc_host *host) | |
1152 | { | |
1153 | int err; | |
1154 | ||
1155 | err = _mmc_sd_suspend(host); | |
1156 | if (!err) { | |
1157 | pm_runtime_disable(&host->card->dev); | |
1158 | pm_runtime_set_suspended(&host->card->dev); | |
1159 | } | |
1160 | ||
1161 | return err; | |
1162 | } | |
1163 | ||
1164 | /* | |
6abaa0c9 PO |
1165 | * This function tries to determine if the same card is still present |
1166 | * and, if so, restore all state to it. | |
1167 | */ | |
0cb403a2 | 1168 | static int _mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 | 1169 | { |
9ec775f7 | 1170 | int err = 0; |
f1da17ac SM |
1171 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
1172 | int retries; | |
1173 | #endif | |
6abaa0c9 PO |
1174 | |
1175 | BUG_ON(!host); | |
1176 | BUG_ON(!host->card); | |
1177 | ||
1178 | mmc_claim_host(host); | |
9ec775f7 UH |
1179 | |
1180 | if (!mmc_card_suspended(host->card)) | |
1181 | goto out; | |
1182 | ||
69041150 | 1183 | mmc_power_up(host, host->card->ocr); |
f1da17ac SM |
1184 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
1185 | retries = 5; | |
1186 | while (retries) { | |
1187 | err = mmc_sd_init_card(host, host->card->ocr, host->card); | |
1188 | ||
1189 | if (err) { | |
1190 | printk(KERN_ERR "%s: Re-init card rc = %d (retries = %d)\n", | |
1191 | mmc_hostname(host), err, retries); | |
1192 | mdelay(5); | |
1193 | retries--; | |
1194 | continue; | |
1195 | } | |
1196 | break; | |
1197 | } | |
1198 | #else | |
69041150 | 1199 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
f1da17ac | 1200 | #endif |
9ec775f7 | 1201 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1202 | |
9ec775f7 UH |
1203 | out: |
1204 | mmc_release_host(host); | |
95cdfb72 | 1205 | return err; |
6abaa0c9 PO |
1206 | } |
1207 | ||
0cb403a2 UH |
1208 | /* |
1209 | * Callback for resume | |
1210 | */ | |
1211 | static int mmc_sd_resume(struct mmc_host *host) | |
1212 | { | |
4d223782 | 1213 | int err = 0; |
0cb403a2 | 1214 | |
4d223782 UH |
1215 | if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { |
1216 | err = _mmc_sd_resume(host); | |
1217 | pm_runtime_set_active(&host->card->dev); | |
1218 | pm_runtime_mark_last_busy(&host->card->dev); | |
1219 | } | |
0cb403a2 UH |
1220 | pm_runtime_enable(&host->card->dev); |
1221 | ||
1222 | return err; | |
1223 | } | |
1224 | ||
c4d770d7 UH |
1225 | /* |
1226 | * Callback for runtime_suspend. | |
1227 | */ | |
1228 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1229 | { | |
1230 | int err; | |
1231 | ||
1232 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1233 | return 0; | |
1234 | ||
0cb403a2 | 1235 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1236 | if (err) |
f42cf8d6 | 1237 | pr_err("%s: error %d doing aggressive suspend\n", |
c4d770d7 | 1238 | mmc_hostname(host), err); |
c4d770d7 | 1239 | |
c4d770d7 UH |
1240 | return err; |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Callback for runtime_resume. | |
1245 | */ | |
1246 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1247 | { | |
1248 | int err; | |
1249 | ||
4d223782 | 1250 | if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME))) |
c4d770d7 UH |
1251 | return 0; |
1252 | ||
0cb403a2 | 1253 | err = _mmc_sd_resume(host); |
c4d770d7 | 1254 | if (err) |
f42cf8d6 | 1255 | pr_err("%s: error %d doing aggressive resume\n", |
c4d770d7 UH |
1256 | mmc_hostname(host), err); |
1257 | ||
c4d770d7 UH |
1258 | return 0; |
1259 | } | |
1260 | ||
dc0ecfef JR |
1261 | static int mmc_sd_reset(struct mmc_host *host) |
1262 | { | |
1263 | mmc_power_cycle(host, host->card->ocr); | |
3056c49c | 1264 | return mmc_sd_init_card(host, host->card->ocr, host->card); |
dc0ecfef JR |
1265 | } |
1266 | ||
6abaa0c9 PO |
1267 | static const struct mmc_bus_ops mmc_sd_ops = { |
1268 | .remove = mmc_sd_remove, | |
1269 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1270 | .runtime_suspend = mmc_sd_runtime_suspend, |
1271 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1272 | .suspend = mmc_sd_suspend, |
1273 | .resume = mmc_sd_resume, | |
d3049504 | 1274 | .alive = mmc_sd_alive, |
5992e786 | 1275 | .shutdown = mmc_sd_suspend, |
dc0ecfef | 1276 | .reset = mmc_sd_reset, |
6abaa0c9 PO |
1277 | }; |
1278 | ||
1279 | /* | |
1280 | * Starting point for SD card init. | |
1281 | */ | |
807e8e40 | 1282 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1283 | { |
1284 | int err; | |
69041150 | 1285 | u32 ocr, rocr; |
2f5481a4 SM |
1286 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
1287 | int retries; | |
1288 | #endif | |
6abaa0c9 PO |
1289 | |
1290 | BUG_ON(!host); | |
d84075c8 | 1291 | WARN_ON(!host->claimed); |
6abaa0c9 | 1292 | |
807e8e40 AR |
1293 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1294 | if (err) | |
1295 | return err; | |
1296 | ||
2501c917 | 1297 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1298 | if (host->ocr_avail_sd) |
1299 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1300 | |
af517150 DB |
1301 | /* |
1302 | * We need to get OCR a different way for SPI. | |
1303 | */ | |
1304 | if (mmc_host_is_spi(host)) { | |
1305 | mmc_go_idle(host); | |
1306 | ||
1307 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1308 | if (err) | |
1309 | goto err; | |
1310 | } | |
1311 | ||
69041150 | 1312 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1313 | |
1314 | /* | |
1315 | * Can we support the voltage(s) of the card(s)? | |
1316 | */ | |
69041150 | 1317 | if (!rocr) { |
109b5bed | 1318 | err = -EINVAL; |
6abaa0c9 | 1319 | goto err; |
109b5bed | 1320 | } |
6abaa0c9 PO |
1321 | |
1322 | /* | |
1323 | * Detect and init the card. | |
1324 | */ | |
2f5481a4 SM |
1325 | #ifdef CONFIG_MMC_PARANOID_SD_INIT |
1326 | retries = 5; | |
1327 | while (retries) { | |
1328 | err = mmc_sd_init_card(host, rocr, NULL); | |
1329 | if (err) { | |
1330 | retries--; | |
1331 | continue; | |
1332 | } | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | if (!retries) { | |
1337 | printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n", | |
1338 | mmc_hostname(host), err); | |
1339 | goto err; | |
1340 | } | |
1341 | #else | |
69041150 | 1342 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1343 | if (err) |
6abaa0c9 | 1344 | goto err; |
2f5481a4 | 1345 | #endif |
6abaa0c9 PO |
1346 | |
1347 | mmc_release_host(host); | |
4101c16a | 1348 | err = mmc_add_card(host->card); |
7ea239d9 | 1349 | if (err) |
2986d0bf | 1350 | goto remove_card; |
7ea239d9 | 1351 | |
2860d060 | 1352 | mmc_claim_host(host); |
7ea239d9 PO |
1353 | return 0; |
1354 | ||
2986d0bf | 1355 | remove_card: |
6abaa0c9 | 1356 | mmc_remove_card(host->card); |
7ea239d9 | 1357 | host->card = NULL; |
2986d0bf | 1358 | mmc_claim_host(host); |
7ea239d9 PO |
1359 | err: |
1360 | mmc_detach_bus(host); | |
7ea239d9 | 1361 | |
a3c76eb9 | 1362 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1363 | mmc_hostname(host), err); |
1364 | ||
adf66a0d | 1365 | return err; |
7ea239d9 | 1366 | } |