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 | |
17b0429d | 360 | err = -EIO; |
1addfcdb PO |
361 | |
362 | status = kmalloc(64, GFP_KERNEL); | |
363 | if (!status) { | |
a3c76eb9 | 364 | pr_err("%s: could not allocate a buffer for " |
facba917 | 365 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 366 | return -ENOMEM; |
1addfcdb PO |
367 | } |
368 | ||
7ea239d9 | 369 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 370 | if (err) |
7ea239d9 PO |
371 | goto out; |
372 | ||
373 | if ((status[16] & 0xF) != 1) { | |
6606110d | 374 | pr_warn("%s: Problem switching card into high-speed mode!\n", |
7ea239d9 | 375 | mmc_hostname(card->host)); |
71578a1e | 376 | err = 0; |
7ea239d9 | 377 | } else { |
71578a1e | 378 | err = 1; |
7ea239d9 PO |
379 | } |
380 | ||
381 | out: | |
382 | kfree(status); | |
383 | ||
384 | return err; | |
385 | } | |
386 | ||
d6d50a15 AN |
387 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
388 | { | |
ca8e99b3 PR |
389 | int host_drv_type = SD_DRIVER_TYPE_B; |
390 | int card_drv_type = SD_DRIVER_TYPE_B; | |
391 | int drive_strength; | |
d6d50a15 AN |
392 | int err; |
393 | ||
394 | /* | |
395 | * If the host doesn't support any of the Driver Types A,C or D, | |
ca8e99b3 PR |
396 | * or there is no board specific handler then default Driver |
397 | * Type B is used. | |
d6d50a15 AN |
398 | */ |
399 | if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C | |
400 | | MMC_CAP_DRIVER_TYPE_D))) | |
401 | return 0; | |
402 | ||
ca8e99b3 PR |
403 | if (!card->host->ops->select_drive_strength) |
404 | return 0; | |
405 | ||
406 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) | |
407 | host_drv_type |= SD_DRIVER_TYPE_A; | |
408 | ||
409 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) | |
410 | host_drv_type |= SD_DRIVER_TYPE_C; | |
411 | ||
412 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) | |
413 | host_drv_type |= SD_DRIVER_TYPE_D; | |
414 | ||
415 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) | |
416 | card_drv_type |= SD_DRIVER_TYPE_A; | |
417 | ||
418 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
419 | card_drv_type |= SD_DRIVER_TYPE_C; | |
420 | ||
421 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) | |
422 | card_drv_type |= SD_DRIVER_TYPE_D; | |
423 | ||
424 | /* | |
425 | * The drive strength that the hardware can support | |
426 | * depends on the board design. Pass the appropriate | |
427 | * information and let the hardware specific code | |
428 | * return what is possible given the options | |
429 | */ | |
2c4967f7 | 430 | mmc_host_clk_hold(card->host); |
ca8e99b3 PR |
431 | drive_strength = card->host->ops->select_drive_strength( |
432 | card->sw_caps.uhs_max_dtr, | |
433 | host_drv_type, card_drv_type); | |
2c4967f7 | 434 | mmc_host_clk_release(card->host); |
d6d50a15 | 435 | |
ca8e99b3 | 436 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); |
d6d50a15 AN |
437 | if (err) |
438 | return err; | |
439 | ||
ca8e99b3 | 440 | if ((status[15] & 0xF) != drive_strength) { |
6606110d | 441 | pr_warn("%s: Problem setting drive strength!\n", |
d6d50a15 AN |
442 | mmc_hostname(card->host)); |
443 | return 0; | |
444 | } | |
445 | ||
ca8e99b3 | 446 | mmc_set_driver_type(card->host, drive_strength); |
d6d50a15 AN |
447 | |
448 | return 0; | |
449 | } | |
450 | ||
93c712f9 | 451 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 452 | { |
49c468fc AN |
453 | /* |
454 | * If the host doesn't support any of the UHS-I modes, fallback on | |
455 | * default speed. | |
456 | */ | |
3f8a7fab | 457 | if (!mmc_host_uhs(card->host)) { |
93c712f9 SJ |
458 | card->sd_bus_speed = 0; |
459 | return; | |
460 | } | |
49c468fc AN |
461 | |
462 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
463 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 464 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
465 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
466 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 467 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
468 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
469 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
470 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 471 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
472 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
473 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
474 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 475 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
476 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
477 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
478 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
479 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
480 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
481 | } | |
482 | } | |
483 | ||
484 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
485 | { | |
486 | int err; | |
487 | unsigned int timing = 0; | |
488 | ||
489 | switch (card->sd_bus_speed) { | |
490 | case UHS_SDR104_BUS_SPEED: | |
491 | timing = MMC_TIMING_UHS_SDR104; | |
492 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
493 | break; | |
494 | case UHS_DDR50_BUS_SPEED: | |
495 | timing = MMC_TIMING_UHS_DDR50; | |
496 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
497 | break; | |
498 | case UHS_SDR50_BUS_SPEED: | |
499 | timing = MMC_TIMING_UHS_SDR50; | |
500 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
501 | break; | |
502 | case UHS_SDR25_BUS_SPEED: | |
503 | timing = MMC_TIMING_UHS_SDR25; | |
504 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
505 | break; | |
506 | case UHS_SDR12_BUS_SPEED: | |
507 | timing = MMC_TIMING_UHS_SDR12; | |
508 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
509 | break; | |
510 | default: | |
511 | return 0; | |
49c468fc AN |
512 | } |
513 | ||
93c712f9 | 514 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
515 | if (err) |
516 | return err; | |
517 | ||
93c712f9 | 518 | if ((status[16] & 0xF) != card->sd_bus_speed) |
6606110d | 519 | pr_warn("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
520 | mmc_hostname(card->host)); |
521 | else { | |
522 | mmc_set_timing(card->host, timing); | |
523 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
524 | } | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
55c4665e AL |
529 | /* Get host's max current setting at its current voltage */ |
530 | static u32 sd_get_host_max_current(struct mmc_host *host) | |
531 | { | |
532 | u32 voltage, max_current; | |
533 | ||
534 | voltage = 1 << host->ios.vdd; | |
535 | switch (voltage) { | |
536 | case MMC_VDD_165_195: | |
537 | max_current = host->max_current_180; | |
538 | break; | |
539 | case MMC_VDD_29_30: | |
540 | case MMC_VDD_30_31: | |
541 | max_current = host->max_current_300; | |
542 | break; | |
543 | case MMC_VDD_32_33: | |
544 | case MMC_VDD_33_34: | |
545 | max_current = host->max_current_330; | |
546 | break; | |
547 | default: | |
548 | max_current = 0; | |
549 | } | |
550 | ||
551 | return max_current; | |
552 | } | |
553 | ||
5371c927 AN |
554 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
555 | { | |
0aa67700 | 556 | int current_limit = SD_SET_CURRENT_NO_CHANGE; |
5371c927 | 557 | int err; |
55c4665e | 558 | u32 max_current; |
5371c927 AN |
559 | |
560 | /* | |
561 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
0aa67700 PR |
562 | * bus speed modes. For other bus speed modes, we do not change the |
563 | * current limit. | |
55c4665e AL |
564 | */ |
565 | if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) && | |
566 | (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) && | |
567 | (card->sd_bus_speed != UHS_DDR50_BUS_SPEED)) | |
568 | return 0; | |
569 | ||
570 | /* | |
571 | * Host has different current capabilities when operating at | |
572 | * different voltages, so find out its max current first. | |
573 | */ | |
574 | max_current = sd_get_host_max_current(card->host); | |
575 | ||
576 | /* | |
a39ca6ae AL |
577 | * We only check host's capability here, if we set a limit that is |
578 | * higher than the card's maximum current, the card will be using its | |
579 | * maximum current, e.g. if the card's maximum current is 300ma, and | |
580 | * when we set current limit to 200ma, the card will draw 200ma, and | |
581 | * when we set current limit to 400/600/800ma, the card will draw its | |
582 | * maximum 300ma from the host. | |
5371c927 | 583 | */ |
55c4665e AL |
584 | if (max_current >= 800) |
585 | current_limit = SD_SET_CURRENT_LIMIT_800; | |
586 | else if (max_current >= 600) | |
587 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
588 | else if (max_current >= 400) | |
589 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
590 | else if (max_current >= 200) | |
591 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
5371c927 | 592 | |
0aa67700 PR |
593 | if (current_limit != SD_SET_CURRENT_NO_CHANGE) { |
594 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
595 | if (err) | |
596 | return err; | |
5371c927 | 597 | |
0aa67700 | 598 | if (((status[15] >> 4) & 0x0F) != current_limit) |
6606110d | 599 | pr_warn("%s: Problem setting current limit!\n", |
0aa67700 | 600 | mmc_hostname(card->host)); |
5371c927 | 601 | |
0aa67700 | 602 | } |
a39ca6ae | 603 | |
5371c927 AN |
604 | return 0; |
605 | } | |
606 | ||
d6d50a15 AN |
607 | /* |
608 | * UHS-I specific initialization procedure | |
609 | */ | |
610 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
611 | { | |
612 | int err; | |
613 | u8 *status; | |
614 | ||
615 | if (!card->scr.sda_spec3) | |
616 | return 0; | |
617 | ||
618 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
619 | return 0; | |
620 | ||
621 | status = kmalloc(64, GFP_KERNEL); | |
622 | if (!status) { | |
a3c76eb9 | 623 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
624 | "switch capabilities.\n", mmc_hostname(card->host)); |
625 | return -ENOMEM; | |
626 | } | |
627 | ||
628 | /* Set 4-bit bus width */ | |
629 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
630 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
631 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
632 | if (err) | |
633 | goto out; | |
634 | ||
635 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
636 | } | |
637 | ||
93c712f9 SJ |
638 | /* |
639 | * Select the bus speed mode depending on host | |
640 | * and card capability. | |
641 | */ | |
642 | sd_update_bus_speed_mode(card); | |
643 | ||
d6d50a15 AN |
644 | /* Set the driver strength for the card */ |
645 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
646 | if (err) |
647 | goto out; | |
648 | ||
93c712f9 SJ |
649 | /* Set current limit for the card */ |
650 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
651 | if (err) |
652 | goto out; | |
653 | ||
93c712f9 SJ |
654 | /* Set bus speed mode of the card */ |
655 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
656 | if (err) |
657 | goto out; | |
658 | ||
810e08ee FS |
659 | /* |
660 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
661 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
662 | */ | |
663 | if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning && | |
664 | (card->sd_bus_speed == UHS_SDR50_BUS_SPEED || | |
665 | card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) { | |
2c4967f7 | 666 | mmc_host_clk_hold(card->host); |
a4924c71 G |
667 | err = card->host->ops->execute_tuning(card->host, |
668 | MMC_SEND_TUNING_BLOCK); | |
2c4967f7 SRT |
669 | mmc_host_clk_release(card->host); |
670 | } | |
d6d50a15 AN |
671 | |
672 | out: | |
673 | kfree(status); | |
674 | ||
675 | return err; | |
676 | } | |
677 | ||
51ec92e2 PO |
678 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
679 | card->raw_cid[2], card->raw_cid[3]); | |
680 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
681 | card->raw_csd[2], card->raw_csd[3]); | |
682 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
683 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
684 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
685 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
686 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
687 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
688 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
689 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
690 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
691 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
692 | ||
693 | ||
694 | static struct attribute *sd_std_attrs[] = { | |
695 | &dev_attr_cid.attr, | |
696 | &dev_attr_csd.attr, | |
697 | &dev_attr_scr.attr, | |
698 | &dev_attr_date.attr, | |
dfe86cba AH |
699 | &dev_attr_erase_size.attr, |
700 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
701 | &dev_attr_fwrev.attr, |
702 | &dev_attr_hwrev.attr, | |
703 | &dev_attr_manfid.attr, | |
704 | &dev_attr_name.attr, | |
705 | &dev_attr_oemid.attr, | |
706 | &dev_attr_serial.attr, | |
707 | NULL, | |
708 | }; | |
d1e58212 | 709 | ATTRIBUTE_GROUPS(sd_std); |
51ec92e2 | 710 | |
71578a1e | 711 | struct device_type sd_type = { |
d1e58212 | 712 | .groups = sd_std_groups, |
51ec92e2 PO |
713 | }; |
714 | ||
7ea239d9 | 715 | /* |
71578a1e | 716 | * Fetch CID from card. |
7ea239d9 | 717 | */ |
d6d50a15 | 718 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 719 | { |
7ea239d9 | 720 | int err; |
55c4665e | 721 | u32 max_current; |
0797e5f1 | 722 | int retries = 10; |
69041150 | 723 | u32 pocr = ocr; |
0797e5f1 JR |
724 | |
725 | try_again: | |
726 | if (!retries) { | |
727 | ocr &= ~SD_OCR_S18R; | |
6606110d | 728 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 729 | } |
7ea239d9 | 730 | |
7ea239d9 PO |
731 | /* |
732 | * Since we're changing the OCR value, we seem to | |
733 | * need to tell some cards to go back to the idle | |
734 | * state. We wait 1ms to give cards time to | |
735 | * respond. | |
736 | */ | |
737 | mmc_go_idle(host); | |
738 | ||
739 | /* | |
740 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
741 | * compliant card and we should set bit 30 | |
742 | * of the ocr to indicate that we can handle | |
743 | * block-addressed SDHC cards. | |
744 | */ | |
6abaa0c9 | 745 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 746 | if (!err) |
f2119df6 | 747 | ocr |= SD_OCR_CCS; |
7ea239d9 | 748 | |
f2119df6 AN |
749 | /* |
750 | * If the host supports one of UHS-I modes, request the card | |
0797e5f1 JR |
751 | * to switch to 1.8V signaling level. If the card has failed |
752 | * repeatedly to switch however, skip this. | |
f2119df6 | 753 | */ |
0797e5f1 | 754 | if (retries && mmc_host_uhs(host)) |
f2119df6 AN |
755 | ocr |= SD_OCR_S18R; |
756 | ||
55c4665e AL |
757 | /* |
758 | * If the host can supply more than 150mA at current voltage, | |
759 | * XPC should be set to 1. | |
760 | */ | |
761 | max_current = sd_get_host_max_current(host); | |
762 | if (max_current > 150) | |
f2119df6 AN |
763 | ocr |= SD_OCR_XPC; |
764 | ||
d6d50a15 | 765 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 766 | if (err) |
71578a1e | 767 | return err; |
7ea239d9 | 768 | |
f2119df6 AN |
769 | /* |
770 | * In case CCS and S18A in the response is set, start Signal Voltage | |
771 | * Switch procedure. SPI mode doesn't support CMD11. | |
772 | */ | |
d6d50a15 AN |
773 | if (!mmc_host_is_spi(host) && rocr && |
774 | ((*rocr & 0x41000000) == 0x41000000)) { | |
0f791fda | 775 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
69041150 | 776 | pocr); |
0797e5f1 JR |
777 | if (err == -EAGAIN) { |
778 | retries--; | |
779 | goto try_again; | |
780 | } else if (err) { | |
781 | retries = 0; | |
f2119df6 AN |
782 | goto try_again; |
783 | } | |
784 | } | |
785 | ||
af517150 DB |
786 | if (mmc_host_is_spi(host)) |
787 | err = mmc_send_cid(host, cid); | |
788 | else | |
789 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
790 | |
791 | return err; | |
792 | } | |
793 | ||
794 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
795 | { | |
796 | int err; | |
797 | ||
798 | /* | |
799 | * Fetch CSD from card. | |
800 | */ | |
801 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 802 | if (err) |
71578a1e | 803 | return err; |
7ea239d9 | 804 | |
71578a1e MM |
805 | err = mmc_decode_csd(card); |
806 | if (err) | |
807 | return err; | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, | |
813 | bool reinit) | |
814 | { | |
815 | int err; | |
816 | ||
817 | if (!reinit) { | |
818 | /* | |
819 | * Fetch SCR from card. | |
820 | */ | |
821 | err = mmc_app_send_scr(card, card->raw_scr); | |
822 | if (err) | |
823 | return err; | |
824 | ||
825 | err = mmc_decode_scr(card); | |
826 | if (err) | |
827 | return err; | |
828 | ||
dfe86cba AH |
829 | /* |
830 | * Fetch and process SD Status register. | |
831 | */ | |
832 | err = mmc_read_ssr(card); | |
833 | if (err) | |
834 | return err; | |
835 | ||
836 | /* Erase init depends on CSD and SSR */ | |
837 | mmc_init_erase(card); | |
838 | ||
71578a1e MM |
839 | /* |
840 | * Fetch switch information from card. | |
841 | */ | |
842 | err = mmc_read_switch(card); | |
843 | if (err) | |
844 | return err; | |
845 | } | |
846 | ||
847 | /* | |
848 | * For SPI, enable CRC as appropriate. | |
849 | * This CRC enable is located AFTER the reading of the | |
850 | * card registers because some SDHC cards are not able | |
851 | * to provide valid CRCs for non-512-byte blocks. | |
852 | */ | |
853 | if (mmc_host_is_spi(host)) { | |
854 | err = mmc_spi_set_crc(host, use_spi_crc); | |
855 | if (err) | |
856 | return err; | |
857 | } | |
858 | ||
859 | /* | |
860 | * Check if read-only switch is active. | |
861 | */ | |
862 | if (!reinit) { | |
863 | int ro = -1; | |
864 | ||
2c4967f7 SRT |
865 | if (host->ops->get_ro) { |
866 | mmc_host_clk_hold(card->host); | |
71578a1e | 867 | ro = host->ops->get_ro(host); |
2c4967f7 SRT |
868 | mmc_host_clk_release(card->host); |
869 | } | |
71578a1e MM |
870 | |
871 | if (ro < 0) { | |
6606110d | 872 | pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n", |
71578a1e MM |
873 | mmc_hostname(host)); |
874 | } else if (ro > 0) { | |
875 | mmc_card_set_readonly(card); | |
adf66a0d | 876 | } |
71578a1e MM |
877 | } |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
883 | { | |
884 | unsigned max_dtr = (unsigned int)-1; | |
885 | ||
cdc99179 | 886 | if (mmc_card_hs(card)) { |
71578a1e MM |
887 | if (max_dtr > card->sw_caps.hs_max_dtr) |
888 | max_dtr = card->sw_caps.hs_max_dtr; | |
889 | } else if (max_dtr > card->csd.max_dtr) { | |
890 | max_dtr = card->csd.max_dtr; | |
891 | } | |
892 | ||
893 | return max_dtr; | |
894 | } | |
895 | ||
71578a1e MM |
896 | /* |
897 | * Handle the detection and initialisation of a card. | |
898 | * | |
899 | * In the case of a resume, "oldcard" will contain the card | |
900 | * we're trying to reinitialise. | |
901 | */ | |
902 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
903 | struct mmc_card *oldcard) | |
904 | { | |
905 | struct mmc_card *card; | |
906 | int err; | |
907 | u32 cid[4]; | |
d6d50a15 | 908 | u32 rocr = 0; |
71578a1e MM |
909 | |
910 | BUG_ON(!host); | |
911 | WARN_ON(!host->claimed); | |
912 | ||
d6d50a15 | 913 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
914 | if (err) |
915 | return err; | |
916 | ||
917 | if (oldcard) { | |
918 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
919 | return -ENOENT; | |
7ea239d9 | 920 | |
6abaa0c9 PO |
921 | card = oldcard; |
922 | } else { | |
923 | /* | |
924 | * Allocate card structure. | |
925 | */ | |
51ec92e2 | 926 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
927 | if (IS_ERR(card)) |
928 | return PTR_ERR(card); | |
6abaa0c9 | 929 | |
69041150 | 930 | card->ocr = ocr; |
6abaa0c9 PO |
931 | card->type = MMC_TYPE_SD; |
932 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
933 | } | |
7ea239d9 PO |
934 | |
935 | /* | |
af517150 | 936 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 937 | */ |
af517150 DB |
938 | if (!mmc_host_is_spi(host)) { |
939 | err = mmc_send_relative_addr(host, &card->rca); | |
940 | if (err) | |
7fca9675 | 941 | goto free_card; |
af517150 | 942 | } |
7ea239d9 | 943 | |
6abaa0c9 | 944 | if (!oldcard) { |
71578a1e | 945 | err = mmc_sd_get_csd(host, card); |
17b0429d | 946 | if (err) |
7fca9675 | 947 | goto free_card; |
bd766312 | 948 | |
6abaa0c9 PO |
949 | mmc_decode_cid(card); |
950 | } | |
7ea239d9 | 951 | |
3d705d14 SH |
952 | /* |
953 | * handling only for cards supporting DSR and hosts requesting | |
954 | * DSR configuration | |
955 | */ | |
956 | if (card->csd.dsr_imp && host->dsr_req) | |
957 | mmc_set_dsr(host); | |
958 | ||
7ea239d9 | 959 | /* |
6abaa0c9 | 960 | * Select card, as all following commands rely on that. |
7ea239d9 | 961 | */ |
af517150 DB |
962 | if (!mmc_host_is_spi(host)) { |
963 | err = mmc_select_card(card); | |
964 | if (err) | |
7fca9675 | 965 | goto free_card; |
6abaa0c9 | 966 | } |
1addfcdb | 967 | |
71578a1e MM |
968 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
969 | if (err) | |
970 | goto free_card; | |
9d9f25c0 | 971 | |
d6d50a15 AN |
972 | /* Initialization sequence for UHS-I cards */ |
973 | if (rocr & SD_ROCR_S18A) { | |
974 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 975 | if (err) |
7ea239d9 | 976 | goto free_card; |
d6d50a15 AN |
977 | } else { |
978 | /* | |
979 | * Attempt to change to high-speed (if supported) | |
980 | */ | |
981 | err = mmc_sd_switch_hs(card); | |
982 | if (err > 0) | |
cdc99179 | 983 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
d6d50a15 AN |
984 | else if (err) |
985 | goto free_card; | |
986 | ||
987 | /* | |
988 | * Set bus speed. | |
989 | */ | |
990 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 991 | |
d6d50a15 AN |
992 | /* |
993 | * Switch to wider bus (if supported). | |
994 | */ | |
995 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
996 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
997 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
998 | if (err) | |
999 | goto free_card; | |
1000 | ||
1001 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
1002 | } | |
7ea239d9 PO |
1003 | } |
1004 | ||
71578a1e | 1005 | host->card = card; |
17b0429d | 1006 | return 0; |
6abaa0c9 PO |
1007 | |
1008 | free_card: | |
1009 | if (!oldcard) | |
1010 | mmc_remove_card(card); | |
6abaa0c9 | 1011 | |
adf66a0d | 1012 | return err; |
6abaa0c9 PO |
1013 | } |
1014 | ||
1015 | /* | |
1016 | * Host is being removed. Free up the current card. | |
1017 | */ | |
1018 | static void mmc_sd_remove(struct mmc_host *host) | |
1019 | { | |
1020 | BUG_ON(!host); | |
1021 | BUG_ON(!host->card); | |
1022 | ||
1023 | mmc_remove_card(host->card); | |
1024 | host->card = NULL; | |
1025 | } | |
1026 | ||
d3049504 AH |
1027 | /* |
1028 | * Card detection - card is alive. | |
1029 | */ | |
1030 | static int mmc_sd_alive(struct mmc_host *host) | |
1031 | { | |
1032 | return mmc_send_status(host->card, NULL); | |
1033 | } | |
1034 | ||
6abaa0c9 PO |
1035 | /* |
1036 | * Card detection callback from host. | |
1037 | */ | |
1038 | static void mmc_sd_detect(struct mmc_host *host) | |
1039 | { | |
1040 | int err; | |
1041 | ||
1042 | BUG_ON(!host); | |
1043 | BUG_ON(!host->card); | |
1044 | ||
e94cfef6 | 1045 | mmc_get_card(host->card); |
6abaa0c9 PO |
1046 | |
1047 | /* | |
1048 | * Just check if our card has been removed. | |
1049 | */ | |
d3049504 | 1050 | err = _mmc_detect_card_removed(host); |
7ea239d9 | 1051 | |
e94cfef6 | 1052 | mmc_put_card(host->card); |
7ea239d9 | 1053 | |
17b0429d | 1054 | if (err) { |
4101c16a | 1055 | mmc_sd_remove(host); |
6abaa0c9 PO |
1056 | |
1057 | mmc_claim_host(host); | |
1058 | mmc_detach_bus(host); | |
7f7e4129 | 1059 | mmc_power_off(host); |
6abaa0c9 PO |
1060 | mmc_release_host(host); |
1061 | } | |
1062 | } | |
1063 | ||
0cb403a2 | 1064 | static int _mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 | 1065 | { |
85e727ed JC |
1066 | int err = 0; |
1067 | ||
6abaa0c9 PO |
1068 | BUG_ON(!host); |
1069 | BUG_ON(!host->card); | |
1070 | ||
1071 | mmc_claim_host(host); | |
9ec775f7 UH |
1072 | |
1073 | if (mmc_card_suspended(host->card)) | |
1074 | goto out; | |
1075 | ||
af517150 | 1076 | if (!mmc_host_is_spi(host)) |
85e727ed | 1077 | err = mmc_deselect_cards(host); |
cdc99179 | 1078 | |
9ec775f7 | 1079 | if (!err) { |
74590263 | 1080 | mmc_power_off(host); |
9ec775f7 UH |
1081 | mmc_card_set_suspended(host->card); |
1082 | } | |
95cdfb72 | 1083 | |
9ec775f7 UH |
1084 | out: |
1085 | mmc_release_host(host); | |
85e727ed | 1086 | return err; |
6abaa0c9 PO |
1087 | } |
1088 | ||
1089 | /* | |
0cb403a2 UH |
1090 | * Callback for suspend |
1091 | */ | |
1092 | static int mmc_sd_suspend(struct mmc_host *host) | |
1093 | { | |
1094 | int err; | |
1095 | ||
1096 | err = _mmc_sd_suspend(host); | |
1097 | if (!err) { | |
1098 | pm_runtime_disable(&host->card->dev); | |
1099 | pm_runtime_set_suspended(&host->card->dev); | |
1100 | } | |
1101 | ||
1102 | return err; | |
1103 | } | |
1104 | ||
1105 | /* | |
6abaa0c9 PO |
1106 | * This function tries to determine if the same card is still present |
1107 | * and, if so, restore all state to it. | |
1108 | */ | |
0cb403a2 | 1109 | static int _mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 | 1110 | { |
9ec775f7 | 1111 | int err = 0; |
6abaa0c9 PO |
1112 | |
1113 | BUG_ON(!host); | |
1114 | BUG_ON(!host->card); | |
1115 | ||
1116 | mmc_claim_host(host); | |
9ec775f7 UH |
1117 | |
1118 | if (!mmc_card_suspended(host->card)) | |
1119 | goto out; | |
1120 | ||
69041150 | 1121 | mmc_power_up(host, host->card->ocr); |
69041150 | 1122 | err = mmc_sd_init_card(host, host->card->ocr, host->card); |
9ec775f7 | 1123 | mmc_card_clr_suspended(host->card); |
2986d0bf | 1124 | |
9ec775f7 UH |
1125 | out: |
1126 | mmc_release_host(host); | |
95cdfb72 | 1127 | return err; |
6abaa0c9 PO |
1128 | } |
1129 | ||
0cb403a2 UH |
1130 | /* |
1131 | * Callback for resume | |
1132 | */ | |
1133 | static int mmc_sd_resume(struct mmc_host *host) | |
1134 | { | |
4d223782 | 1135 | int err = 0; |
0cb403a2 | 1136 | |
4d223782 UH |
1137 | if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { |
1138 | err = _mmc_sd_resume(host); | |
1139 | pm_runtime_set_active(&host->card->dev); | |
1140 | pm_runtime_mark_last_busy(&host->card->dev); | |
1141 | } | |
0cb403a2 UH |
1142 | pm_runtime_enable(&host->card->dev); |
1143 | ||
1144 | return err; | |
1145 | } | |
1146 | ||
c4d770d7 UH |
1147 | /* |
1148 | * Callback for runtime_suspend. | |
1149 | */ | |
1150 | static int mmc_sd_runtime_suspend(struct mmc_host *host) | |
1151 | { | |
1152 | int err; | |
1153 | ||
1154 | if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) | |
1155 | return 0; | |
1156 | ||
0cb403a2 | 1157 | err = _mmc_sd_suspend(host); |
0cc81a8c | 1158 | if (err) |
c4d770d7 UH |
1159 | pr_err("%s: error %d doing aggessive suspend\n", |
1160 | mmc_hostname(host), err); | |
c4d770d7 | 1161 | |
c4d770d7 UH |
1162 | return err; |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * Callback for runtime_resume. | |
1167 | */ | |
1168 | static int mmc_sd_runtime_resume(struct mmc_host *host) | |
1169 | { | |
1170 | int err; | |
1171 | ||
4d223782 | 1172 | if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME))) |
c4d770d7 UH |
1173 | return 0; |
1174 | ||
0cb403a2 | 1175 | err = _mmc_sd_resume(host); |
c4d770d7 UH |
1176 | if (err) |
1177 | pr_err("%s: error %d doing aggessive resume\n", | |
1178 | mmc_hostname(host), err); | |
1179 | ||
c4d770d7 UH |
1180 | return 0; |
1181 | } | |
1182 | ||
12ae637f | 1183 | static int mmc_sd_power_restore(struct mmc_host *host) |
eae1aeee | 1184 | { |
12ae637f OBC |
1185 | int ret; |
1186 | ||
eae1aeee | 1187 | mmc_claim_host(host); |
69041150 | 1188 | ret = mmc_sd_init_card(host, host->card->ocr, host->card); |
eae1aeee | 1189 | mmc_release_host(host); |
12ae637f OBC |
1190 | |
1191 | return ret; | |
eae1aeee AH |
1192 | } |
1193 | ||
6abaa0c9 PO |
1194 | static const struct mmc_bus_ops mmc_sd_ops = { |
1195 | .remove = mmc_sd_remove, | |
1196 | .detect = mmc_sd_detect, | |
c4d770d7 UH |
1197 | .runtime_suspend = mmc_sd_runtime_suspend, |
1198 | .runtime_resume = mmc_sd_runtime_resume, | |
6abaa0c9 PO |
1199 | .suspend = mmc_sd_suspend, |
1200 | .resume = mmc_sd_resume, | |
eae1aeee | 1201 | .power_restore = mmc_sd_power_restore, |
d3049504 | 1202 | .alive = mmc_sd_alive, |
5992e786 | 1203 | .shutdown = mmc_sd_suspend, |
6abaa0c9 PO |
1204 | }; |
1205 | ||
1206 | /* | |
1207 | * Starting point for SD card init. | |
1208 | */ | |
807e8e40 | 1209 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1210 | { |
1211 | int err; | |
69041150 | 1212 | u32 ocr, rocr; |
6abaa0c9 PO |
1213 | |
1214 | BUG_ON(!host); | |
d84075c8 | 1215 | WARN_ON(!host->claimed); |
6abaa0c9 | 1216 | |
807e8e40 AR |
1217 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1218 | if (err) | |
1219 | return err; | |
1220 | ||
2501c917 | 1221 | mmc_attach_bus(host, &mmc_sd_ops); |
8f230f45 TI |
1222 | if (host->ocr_avail_sd) |
1223 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1224 | |
af517150 DB |
1225 | /* |
1226 | * We need to get OCR a different way for SPI. | |
1227 | */ | |
1228 | if (mmc_host_is_spi(host)) { | |
1229 | mmc_go_idle(host); | |
1230 | ||
1231 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1232 | if (err) | |
1233 | goto err; | |
1234 | } | |
1235 | ||
69041150 | 1236 | rocr = mmc_select_voltage(host, ocr); |
6abaa0c9 PO |
1237 | |
1238 | /* | |
1239 | * Can we support the voltage(s) of the card(s)? | |
1240 | */ | |
69041150 | 1241 | if (!rocr) { |
109b5bed | 1242 | err = -EINVAL; |
6abaa0c9 | 1243 | goto err; |
109b5bed | 1244 | } |
6abaa0c9 PO |
1245 | |
1246 | /* | |
1247 | * Detect and init the card. | |
1248 | */ | |
69041150 | 1249 | err = mmc_sd_init_card(host, rocr, NULL); |
17b0429d | 1250 | if (err) |
6abaa0c9 PO |
1251 | goto err; |
1252 | ||
1253 | mmc_release_host(host); | |
4101c16a | 1254 | err = mmc_add_card(host->card); |
807e8e40 | 1255 | mmc_claim_host(host); |
7ea239d9 | 1256 | if (err) |
2986d0bf | 1257 | goto remove_card; |
7ea239d9 PO |
1258 | |
1259 | return 0; | |
1260 | ||
2986d0bf | 1261 | remove_card: |
807e8e40 | 1262 | mmc_release_host(host); |
6abaa0c9 | 1263 | mmc_remove_card(host->card); |
7ea239d9 | 1264 | host->card = NULL; |
2986d0bf | 1265 | mmc_claim_host(host); |
7ea239d9 PO |
1266 | err: |
1267 | mmc_detach_bus(host); | |
7ea239d9 | 1268 | |
a3c76eb9 | 1269 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1270 | mmc_hostname(host), err); |
1271 | ||
adf66a0d | 1272 | return err; |
7ea239d9 PO |
1273 | } |
1274 |