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> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
0205a904 | 15 | #include <linux/stat.h> |
7ea239d9 PO |
16 | |
17 | #include <linux/mmc/host.h> | |
18 | #include <linux/mmc/card.h> | |
19 | #include <linux/mmc/mmc.h> | |
3373c0ae | 20 | #include <linux/mmc/sd.h> |
7ea239d9 PO |
21 | |
22 | #include "core.h" | |
4101c16a | 23 | #include "bus.h" |
7ea239d9 | 24 | #include "mmc_ops.h" |
ce101496 | 25 | #include "sd.h" |
7ea239d9 PO |
26 | #include "sd_ops.h" |
27 | ||
7ea239d9 PO |
28 | static const unsigned int tran_exp[] = { |
29 | 10000, 100000, 1000000, 10000000, | |
30 | 0, 0, 0, 0 | |
31 | }; | |
32 | ||
33 | static const unsigned char tran_mant[] = { | |
34 | 0, 10, 12, 13, 15, 20, 25, 30, | |
35 | 35, 40, 45, 50, 55, 60, 70, 80, | |
36 | }; | |
37 | ||
38 | static const unsigned int tacc_exp[] = { | |
39 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
40 | }; | |
41 | ||
42 | static const unsigned int tacc_mant[] = { | |
43 | 0, 10, 12, 13, 15, 20, 25, 30, | |
44 | 35, 40, 45, 50, 55, 60, 70, 80, | |
45 | }; | |
46 | ||
47 | #define UNSTUFF_BITS(resp,start,size) \ | |
48 | ({ \ | |
49 | const int __size = size; \ | |
50 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
51 | const int __off = 3 - ((start) / 32); \ | |
52 | const int __shft = (start) & 31; \ | |
53 | u32 __res; \ | |
54 | \ | |
55 | __res = resp[__off] >> __shft; \ | |
56 | if (__size + __shft > 32) \ | |
57 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
58 | __res & __mask; \ | |
59 | }) | |
60 | ||
61 | /* | |
62 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
63 | */ | |
71578a1e | 64 | void mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
65 | { |
66 | u32 *resp = card->raw_cid; | |
67 | ||
68 | memset(&card->cid, 0, sizeof(struct mmc_cid)); | |
69 | ||
70 | /* | |
71 | * SD doesn't currently have a version field so we will | |
72 | * have to assume we can parse this. | |
73 | */ | |
74 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
75 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
76 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
77 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
78 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
79 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
80 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
81 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); | |
82 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); | |
83 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); | |
84 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); | |
85 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); | |
86 | ||
87 | card->cid.year += 2000; /* SD cards year offset */ | |
88 | } | |
89 | ||
90 | /* | |
91 | * Given a 128-bit response, decode to our card CSD structure. | |
92 | */ | |
bd766312 | 93 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
94 | { |
95 | struct mmc_csd *csd = &card->csd; | |
96 | unsigned int e, m, csd_struct; | |
97 | u32 *resp = card->raw_csd; | |
98 | ||
99 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
100 | ||
101 | switch (csd_struct) { | |
102 | case 0: | |
103 | m = UNSTUFF_BITS(resp, 115, 4); | |
104 | e = UNSTUFF_BITS(resp, 112, 3); | |
105 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
106 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
107 | ||
108 | m = UNSTUFF_BITS(resp, 99, 4); | |
109 | e = UNSTUFF_BITS(resp, 96, 3); | |
110 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
111 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
112 | ||
113 | e = UNSTUFF_BITS(resp, 47, 3); | |
114 | m = UNSTUFF_BITS(resp, 62, 12); | |
115 | csd->capacity = (1 + m) << (e + 2); | |
116 | ||
117 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
118 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
119 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
120 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
121 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
122 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
123 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
dfe86cba AH |
124 | |
125 | if (UNSTUFF_BITS(resp, 46, 1)) { | |
126 | csd->erase_size = 1; | |
127 | } else if (csd->write_blkbits >= 9) { | |
128 | csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; | |
129 | csd->erase_size <<= csd->write_blkbits - 9; | |
130 | } | |
7ea239d9 PO |
131 | break; |
132 | case 1: | |
133 | /* | |
3a303511 | 134 | * This is a block-addressed SDHC or SDXC card. Most |
7ea239d9 PO |
135 | * interesting fields are unused and have fixed |
136 | * values. To avoid getting tripped by buggy cards, | |
137 | * we assume those fixed values ourselves. | |
138 | */ | |
139 | mmc_card_set_blockaddr(card); | |
140 | ||
141 | csd->tacc_ns = 0; /* Unused */ | |
142 | csd->tacc_clks = 0; /* Unused */ | |
143 | ||
144 | m = UNSTUFF_BITS(resp, 99, 4); | |
145 | e = UNSTUFF_BITS(resp, 96, 3); | |
146 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
147 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
3a303511 AN |
148 | csd->c_size = UNSTUFF_BITS(resp, 48, 22); |
149 | ||
150 | /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ | |
151 | if (csd->c_size >= 0xFFFF) | |
152 | mmc_card_set_ext_capacity(card); | |
7ea239d9 PO |
153 | |
154 | m = UNSTUFF_BITS(resp, 48, 22); | |
155 | csd->capacity = (1 + m) << 10; | |
156 | ||
157 | csd->read_blkbits = 9; | |
158 | csd->read_partial = 0; | |
159 | csd->write_misalign = 0; | |
160 | csd->read_misalign = 0; | |
161 | csd->r2w_factor = 4; /* Unused */ | |
162 | csd->write_blkbits = 9; | |
163 | csd->write_partial = 0; | |
dfe86cba | 164 | csd->erase_size = 1; |
7ea239d9 PO |
165 | break; |
166 | default: | |
a3c76eb9 | 167 | pr_err("%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 168 | mmc_hostname(card->host), csd_struct); |
bd766312 | 169 | return -EINVAL; |
7ea239d9 | 170 | } |
bd766312 | 171 | |
dfe86cba AH |
172 | card->erase_size = csd->erase_size; |
173 | ||
bd766312 | 174 | return 0; |
7ea239d9 PO |
175 | } |
176 | ||
177 | /* | |
178 | * Given a 64-bit response, decode to our card SCR structure. | |
179 | */ | |
bd766312 | 180 | static int mmc_decode_scr(struct mmc_card *card) |
7ea239d9 PO |
181 | { |
182 | struct sd_scr *scr = &card->scr; | |
183 | unsigned int scr_struct; | |
184 | u32 resp[4]; | |
185 | ||
7ea239d9 PO |
186 | resp[3] = card->raw_scr[1]; |
187 | resp[2] = card->raw_scr[0]; | |
188 | ||
189 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
190 | if (scr_struct != 0) { | |
a3c76eb9 | 191 | pr_err("%s: unrecognised SCR structure version %d\n", |
7ea239d9 | 192 | mmc_hostname(card->host), scr_struct); |
bd766312 | 193 | return -EINVAL; |
7ea239d9 PO |
194 | } |
195 | ||
196 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
197 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
013909c4 AN |
198 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
199 | /* Check if Physical Layer Spec v3.0 is supported */ | |
200 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); | |
bd766312 | 201 | |
dfe86cba AH |
202 | if (UNSTUFF_BITS(resp, 55, 1)) |
203 | card->erased_byte = 0xFF; | |
204 | else | |
205 | card->erased_byte = 0x0; | |
206 | ||
f0d89972 AW |
207 | if (scr->sda_spec3) |
208 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); | |
bd766312 | 209 | return 0; |
7ea239d9 PO |
210 | } |
211 | ||
dfe86cba AH |
212 | /* |
213 | * Fetch and process SD Status register. | |
214 | */ | |
215 | static int mmc_read_ssr(struct mmc_card *card) | |
216 | { | |
217 | unsigned int au, es, et, eo; | |
218 | int err, i; | |
219 | u32 *ssr; | |
220 | ||
221 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
a3c76eb9 | 222 | pr_warning("%s: card lacks mandatory SD Status " |
dfe86cba AH |
223 | "function.\n", mmc_hostname(card->host)); |
224 | return 0; | |
225 | } | |
226 | ||
227 | ssr = kmalloc(64, GFP_KERNEL); | |
228 | if (!ssr) | |
229 | return -ENOMEM; | |
230 | ||
231 | err = mmc_app_sd_status(card, ssr); | |
232 | if (err) { | |
a3c76eb9 | 233 | pr_warning("%s: problem reading SD Status " |
dfe86cba AH |
234 | "register.\n", mmc_hostname(card->host)); |
235 | err = 0; | |
236 | goto out; | |
237 | } | |
238 | ||
239 | for (i = 0; i < 16; i++) | |
240 | ssr[i] = be32_to_cpu(ssr[i]); | |
241 | ||
242 | /* | |
243 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
244 | * bitfield positions accordingly. | |
245 | */ | |
246 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); | |
247 | if (au > 0 || au <= 9) { | |
248 | card->ssr.au = 1 << (au + 4); | |
249 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); | |
250 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); | |
251 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); | |
252 | if (es && et) { | |
253 | card->ssr.erase_timeout = (et * 1000) / es; | |
254 | card->ssr.erase_offset = eo * 1000; | |
255 | } | |
256 | } else { | |
a3c76eb9 | 257 | pr_warning("%s: SD Status: Invalid Allocation Unit " |
dfe86cba AH |
258 | "size.\n", mmc_hostname(card->host)); |
259 | } | |
260 | out: | |
261 | kfree(ssr); | |
262 | return err; | |
263 | } | |
264 | ||
7ea239d9 | 265 | /* |
1addfcdb | 266 | * Fetches and decodes switch information |
7ea239d9 | 267 | */ |
1addfcdb | 268 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
269 | { |
270 | int err; | |
271 | u8 *status; | |
272 | ||
3373c0ae | 273 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 274 | return 0; |
3373c0ae PO |
275 | |
276 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
a3c76eb9 | 277 | pr_warning("%s: card lacks mandatory switch " |
3373c0ae PO |
278 | "function, performance might suffer.\n", |
279 | mmc_hostname(card->host)); | |
17b0429d | 280 | return 0; |
3373c0ae PO |
281 | } |
282 | ||
17b0429d | 283 | err = -EIO; |
7ea239d9 PO |
284 | |
285 | status = kmalloc(64, GFP_KERNEL); | |
286 | if (!status) { | |
a3c76eb9 | 287 | pr_err("%s: could not allocate a buffer for " |
013909c4 AN |
288 | "switch capabilities.\n", |
289 | mmc_hostname(card->host)); | |
17b0429d | 290 | return -ENOMEM; |
7ea239d9 PO |
291 | } |
292 | ||
013909c4 | 293 | /* Find out the supported Bus Speed Modes. */ |
7ea239d9 | 294 | err = mmc_sd_switch(card, 0, 0, 1, status); |
17b0429d | 295 | if (err) { |
013909c4 AN |
296 | /* |
297 | * If the host or the card can't do the switch, | |
298 | * fail more gracefully. | |
299 | */ | |
300 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
301 | goto out; |
302 | ||
a3c76eb9 | 303 | pr_warning("%s: problem reading Bus Speed modes.\n", |
3373c0ae | 304 | mmc_hostname(card->host)); |
17b0429d | 305 | err = 0; |
adf66a0d | 306 | |
7ea239d9 PO |
307 | goto out; |
308 | } | |
309 | ||
fffe5d5a QL |
310 | if (status[13] & SD_MODE_HIGH_SPEED) |
311 | card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR; | |
f2815f68 | 312 | |
013909c4 AN |
313 | if (card->scr.sda_spec3) { |
314 | card->sw_caps.sd3_bus_mode = status[13]; | |
315 | ||
316 | /* Find out Driver Strengths supported by the card */ | |
317 | err = mmc_sd_switch(card, 0, 2, 1, status); | |
318 | if (err) { | |
319 | /* | |
320 | * If the host or the card can't do the switch, | |
321 | * fail more gracefully. | |
322 | */ | |
323 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
324 | goto out; | |
325 | ||
a3c76eb9 | 326 | pr_warning("%s: problem reading " |
013909c4 AN |
327 | "Driver Strength.\n", |
328 | mmc_hostname(card->host)); | |
329 | err = 0; | |
330 | ||
331 | goto out; | |
332 | } | |
333 | ||
334 | card->sw_caps.sd3_drv_type = status[9]; | |
335 | ||
336 | /* Find out Current Limits supported by the card */ | |
337 | err = mmc_sd_switch(card, 0, 3, 1, status); | |
338 | if (err) { | |
339 | /* | |
340 | * If the host or the card can't do the switch, | |
341 | * fail more gracefully. | |
342 | */ | |
343 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
344 | goto out; | |
345 | ||
a3c76eb9 | 346 | pr_warning("%s: problem reading " |
013909c4 AN |
347 | "Current Limit.\n", |
348 | mmc_hostname(card->host)); | |
349 | err = 0; | |
350 | ||
351 | goto out; | |
352 | } | |
353 | ||
354 | card->sw_caps.sd3_curr_limit = status[7]; | |
013909c4 | 355 | } |
7ea239d9 | 356 | |
1addfcdb PO |
357 | out: |
358 | kfree(status); | |
359 | ||
360 | return err; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Test if the card supports high-speed mode and, if so, switch to it. | |
365 | */ | |
71578a1e | 366 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
367 | { |
368 | int err; | |
369 | u8 *status; | |
370 | ||
3373c0ae | 371 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 372 | return 0; |
3373c0ae PO |
373 | |
374 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 375 | return 0; |
3373c0ae | 376 | |
1addfcdb | 377 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 378 | return 0; |
1addfcdb PO |
379 | |
380 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 381 | return 0; |
1addfcdb | 382 | |
17b0429d | 383 | err = -EIO; |
1addfcdb PO |
384 | |
385 | status = kmalloc(64, GFP_KERNEL); | |
386 | if (!status) { | |
a3c76eb9 | 387 | pr_err("%s: could not allocate a buffer for " |
facba917 | 388 | "switch capabilities.\n", mmc_hostname(card->host)); |
17b0429d | 389 | return -ENOMEM; |
1addfcdb PO |
390 | } |
391 | ||
7ea239d9 | 392 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 393 | if (err) |
7ea239d9 PO |
394 | goto out; |
395 | ||
396 | if ((status[16] & 0xF) != 1) { | |
a3c76eb9 | 397 | pr_warning("%s: Problem switching card " |
7ea239d9 PO |
398 | "into high-speed mode!\n", |
399 | mmc_hostname(card->host)); | |
71578a1e | 400 | err = 0; |
7ea239d9 | 401 | } else { |
71578a1e | 402 | err = 1; |
7ea239d9 PO |
403 | } |
404 | ||
405 | out: | |
406 | kfree(status); | |
407 | ||
408 | return err; | |
409 | } | |
410 | ||
d6d50a15 AN |
411 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
412 | { | |
ca8e99b3 PR |
413 | int host_drv_type = SD_DRIVER_TYPE_B; |
414 | int card_drv_type = SD_DRIVER_TYPE_B; | |
415 | int drive_strength; | |
d6d50a15 AN |
416 | int err; |
417 | ||
418 | /* | |
419 | * If the host doesn't support any of the Driver Types A,C or D, | |
ca8e99b3 PR |
420 | * or there is no board specific handler then default Driver |
421 | * Type B is used. | |
d6d50a15 AN |
422 | */ |
423 | if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C | |
424 | | MMC_CAP_DRIVER_TYPE_D))) | |
425 | return 0; | |
426 | ||
ca8e99b3 PR |
427 | if (!card->host->ops->select_drive_strength) |
428 | return 0; | |
429 | ||
430 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) | |
431 | host_drv_type |= SD_DRIVER_TYPE_A; | |
432 | ||
433 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) | |
434 | host_drv_type |= SD_DRIVER_TYPE_C; | |
435 | ||
436 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) | |
437 | host_drv_type |= SD_DRIVER_TYPE_D; | |
438 | ||
439 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) | |
440 | card_drv_type |= SD_DRIVER_TYPE_A; | |
441 | ||
442 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
443 | card_drv_type |= SD_DRIVER_TYPE_C; | |
444 | ||
445 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) | |
446 | card_drv_type |= SD_DRIVER_TYPE_D; | |
447 | ||
448 | /* | |
449 | * The drive strength that the hardware can support | |
450 | * depends on the board design. Pass the appropriate | |
451 | * information and let the hardware specific code | |
452 | * return what is possible given the options | |
453 | */ | |
454 | drive_strength = card->host->ops->select_drive_strength( | |
455 | card->sw_caps.uhs_max_dtr, | |
456 | host_drv_type, card_drv_type); | |
d6d50a15 | 457 | |
ca8e99b3 | 458 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); |
d6d50a15 AN |
459 | if (err) |
460 | return err; | |
461 | ||
ca8e99b3 | 462 | if ((status[15] & 0xF) != drive_strength) { |
a3c76eb9 | 463 | pr_warning("%s: Problem setting drive strength!\n", |
d6d50a15 AN |
464 | mmc_hostname(card->host)); |
465 | return 0; | |
466 | } | |
467 | ||
ca8e99b3 | 468 | mmc_set_driver_type(card->host, drive_strength); |
d6d50a15 AN |
469 | |
470 | return 0; | |
471 | } | |
472 | ||
93c712f9 | 473 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 474 | { |
49c468fc AN |
475 | /* |
476 | * If the host doesn't support any of the UHS-I modes, fallback on | |
477 | * default speed. | |
478 | */ | |
479 | if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | | |
93c712f9 SJ |
480 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))) { |
481 | card->sd_bus_speed = 0; | |
482 | return; | |
483 | } | |
49c468fc AN |
484 | |
485 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
486 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 487 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
488 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
489 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 490 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
491 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
492 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
493 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 494 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
495 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
496 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
497 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 498 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
499 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
500 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
501 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
502 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
503 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
504 | } | |
505 | } | |
506 | ||
507 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
508 | { | |
509 | int err; | |
510 | unsigned int timing = 0; | |
511 | ||
512 | switch (card->sd_bus_speed) { | |
513 | case UHS_SDR104_BUS_SPEED: | |
514 | timing = MMC_TIMING_UHS_SDR104; | |
515 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
516 | break; | |
517 | case UHS_DDR50_BUS_SPEED: | |
518 | timing = MMC_TIMING_UHS_DDR50; | |
519 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
520 | break; | |
521 | case UHS_SDR50_BUS_SPEED: | |
522 | timing = MMC_TIMING_UHS_SDR50; | |
523 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
524 | break; | |
525 | case UHS_SDR25_BUS_SPEED: | |
526 | timing = MMC_TIMING_UHS_SDR25; | |
527 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
528 | break; | |
529 | case UHS_SDR12_BUS_SPEED: | |
530 | timing = MMC_TIMING_UHS_SDR12; | |
531 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
532 | break; | |
533 | default: | |
534 | return 0; | |
49c468fc AN |
535 | } |
536 | ||
93c712f9 | 537 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
538 | if (err) |
539 | return err; | |
540 | ||
93c712f9 | 541 | if ((status[16] & 0xF) != card->sd_bus_speed) |
a3c76eb9 | 542 | pr_warning("%s: Problem setting bus speed mode!\n", |
49c468fc AN |
543 | mmc_hostname(card->host)); |
544 | else { | |
545 | mmc_set_timing(card->host, timing); | |
546 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
547 | } | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
5371c927 AN |
552 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
553 | { | |
554 | int current_limit = 0; | |
555 | int err; | |
556 | ||
557 | /* | |
558 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
559 | * bus speed modes. For other bus speed modes, we set the default | |
560 | * current limit of 200mA. | |
561 | */ | |
562 | if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) || | |
563 | (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) || | |
564 | (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) { | |
565 | if (card->host->caps & MMC_CAP_MAX_CURRENT_800) { | |
566 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
567 | current_limit = SD_SET_CURRENT_LIMIT_800; | |
568 | else if (card->sw_caps.sd3_curr_limit & | |
569 | SD_MAX_CURRENT_600) | |
570 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
571 | else if (card->sw_caps.sd3_curr_limit & | |
572 | SD_MAX_CURRENT_400) | |
573 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
574 | else if (card->sw_caps.sd3_curr_limit & | |
575 | SD_MAX_CURRENT_200) | |
576 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
577 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) { | |
578 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
579 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
580 | else if (card->sw_caps.sd3_curr_limit & | |
581 | SD_MAX_CURRENT_400) | |
582 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
583 | else if (card->sw_caps.sd3_curr_limit & | |
584 | SD_MAX_CURRENT_200) | |
585 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
586 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) { | |
587 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
588 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
589 | else if (card->sw_caps.sd3_curr_limit & | |
590 | SD_MAX_CURRENT_200) | |
591 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
592 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) { | |
593 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
594 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
595 | } | |
596 | } else | |
597 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
598 | ||
599 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
600 | if (err) | |
601 | return err; | |
602 | ||
603 | if (((status[15] >> 4) & 0x0F) != current_limit) | |
a3c76eb9 | 604 | pr_warning("%s: Problem setting current limit!\n", |
5371c927 AN |
605 | mmc_hostname(card->host)); |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
d6d50a15 AN |
610 | /* |
611 | * UHS-I specific initialization procedure | |
612 | */ | |
613 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
614 | { | |
615 | int err; | |
616 | u8 *status; | |
617 | ||
618 | if (!card->scr.sda_spec3) | |
619 | return 0; | |
620 | ||
621 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
622 | return 0; | |
623 | ||
624 | status = kmalloc(64, GFP_KERNEL); | |
625 | if (!status) { | |
a3c76eb9 | 626 | pr_err("%s: could not allocate a buffer for " |
d6d50a15 AN |
627 | "switch capabilities.\n", mmc_hostname(card->host)); |
628 | return -ENOMEM; | |
629 | } | |
630 | ||
631 | /* Set 4-bit bus width */ | |
632 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
633 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
634 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
635 | if (err) | |
636 | goto out; | |
637 | ||
638 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
639 | } | |
640 | ||
93c712f9 SJ |
641 | /* |
642 | * Select the bus speed mode depending on host | |
643 | * and card capability. | |
644 | */ | |
645 | sd_update_bus_speed_mode(card); | |
646 | ||
d6d50a15 AN |
647 | /* Set the driver strength for the card */ |
648 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
649 | if (err) |
650 | goto out; | |
651 | ||
93c712f9 SJ |
652 | /* Set current limit for the card */ |
653 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
654 | if (err) |
655 | goto out; | |
656 | ||
93c712f9 SJ |
657 | /* Set bus speed mode of the card */ |
658 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
659 | if (err) |
660 | goto out; | |
661 | ||
662 | /* SPI mode doesn't define CMD19 */ | |
663 | if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning) | |
664 | err = card->host->ops->execute_tuning(card->host); | |
d6d50a15 AN |
665 | |
666 | out: | |
667 | kfree(status); | |
668 | ||
669 | return err; | |
670 | } | |
671 | ||
51ec92e2 PO |
672 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
673 | card->raw_cid[2], card->raw_cid[3]); | |
674 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
675 | card->raw_csd[2], card->raw_csd[3]); | |
676 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
677 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
678 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
679 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
680 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
681 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
682 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
683 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
684 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
685 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
686 | ||
687 | ||
688 | static struct attribute *sd_std_attrs[] = { | |
689 | &dev_attr_cid.attr, | |
690 | &dev_attr_csd.attr, | |
691 | &dev_attr_scr.attr, | |
692 | &dev_attr_date.attr, | |
dfe86cba AH |
693 | &dev_attr_erase_size.attr, |
694 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
695 | &dev_attr_fwrev.attr, |
696 | &dev_attr_hwrev.attr, | |
697 | &dev_attr_manfid.attr, | |
698 | &dev_attr_name.attr, | |
699 | &dev_attr_oemid.attr, | |
700 | &dev_attr_serial.attr, | |
701 | NULL, | |
702 | }; | |
703 | ||
704 | static struct attribute_group sd_std_attr_group = { | |
705 | .attrs = sd_std_attrs, | |
706 | }; | |
707 | ||
a4dbd674 | 708 | static const struct attribute_group *sd_attr_groups[] = { |
51ec92e2 PO |
709 | &sd_std_attr_group, |
710 | NULL, | |
711 | }; | |
712 | ||
71578a1e | 713 | struct device_type sd_type = { |
51ec92e2 PO |
714 | .groups = sd_attr_groups, |
715 | }; | |
716 | ||
7ea239d9 | 717 | /* |
71578a1e | 718 | * Fetch CID from card. |
7ea239d9 | 719 | */ |
d6d50a15 | 720 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 721 | { |
7ea239d9 | 722 | int err; |
7ea239d9 | 723 | |
7ea239d9 PO |
724 | /* |
725 | * Since we're changing the OCR value, we seem to | |
726 | * need to tell some cards to go back to the idle | |
727 | * state. We wait 1ms to give cards time to | |
728 | * respond. | |
729 | */ | |
730 | mmc_go_idle(host); | |
731 | ||
732 | /* | |
733 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
734 | * compliant card and we should set bit 30 | |
735 | * of the ocr to indicate that we can handle | |
736 | * block-addressed SDHC cards. | |
737 | */ | |
6abaa0c9 | 738 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 739 | if (!err) |
f2119df6 | 740 | ocr |= SD_OCR_CCS; |
7ea239d9 | 741 | |
f2119df6 AN |
742 | /* |
743 | * If the host supports one of UHS-I modes, request the card | |
744 | * to switch to 1.8V signaling level. | |
745 | */ | |
746 | if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | | |
747 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)) | |
748 | ocr |= SD_OCR_S18R; | |
749 | ||
750 | /* If the host can supply more than 150mA, XPC should be set to 1. */ | |
751 | if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 | | |
752 | MMC_CAP_SET_XPC_180)) | |
753 | ocr |= SD_OCR_XPC; | |
754 | ||
755 | try_again: | |
d6d50a15 | 756 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 757 | if (err) |
71578a1e | 758 | return err; |
7ea239d9 | 759 | |
f2119df6 AN |
760 | /* |
761 | * In case CCS and S18A in the response is set, start Signal Voltage | |
762 | * Switch procedure. SPI mode doesn't support CMD11. | |
763 | */ | |
d6d50a15 AN |
764 | if (!mmc_host_is_spi(host) && rocr && |
765 | ((*rocr & 0x41000000) == 0x41000000)) { | |
261bbd46 | 766 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true); |
f2119df6 AN |
767 | if (err) { |
768 | ocr &= ~SD_OCR_S18R; | |
769 | goto try_again; | |
770 | } | |
771 | } | |
772 | ||
af517150 DB |
773 | if (mmc_host_is_spi(host)) |
774 | err = mmc_send_cid(host, cid); | |
775 | else | |
776 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
777 | |
778 | return err; | |
779 | } | |
780 | ||
781 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
782 | { | |
783 | int err; | |
784 | ||
785 | /* | |
786 | * Fetch CSD from card. | |
787 | */ | |
788 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 789 | if (err) |
71578a1e | 790 | return err; |
7ea239d9 | 791 | |
71578a1e MM |
792 | err = mmc_decode_csd(card); |
793 | if (err) | |
794 | return err; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, | |
800 | bool reinit) | |
801 | { | |
802 | int err; | |
803 | ||
804 | if (!reinit) { | |
805 | /* | |
806 | * Fetch SCR from card. | |
807 | */ | |
808 | err = mmc_app_send_scr(card, card->raw_scr); | |
809 | if (err) | |
810 | return err; | |
811 | ||
812 | err = mmc_decode_scr(card); | |
813 | if (err) | |
814 | return err; | |
815 | ||
dfe86cba AH |
816 | /* |
817 | * Fetch and process SD Status register. | |
818 | */ | |
819 | err = mmc_read_ssr(card); | |
820 | if (err) | |
821 | return err; | |
822 | ||
823 | /* Erase init depends on CSD and SSR */ | |
824 | mmc_init_erase(card); | |
825 | ||
71578a1e MM |
826 | /* |
827 | * Fetch switch information from card. | |
828 | */ | |
829 | err = mmc_read_switch(card); | |
830 | if (err) | |
831 | return err; | |
832 | } | |
833 | ||
834 | /* | |
835 | * For SPI, enable CRC as appropriate. | |
836 | * This CRC enable is located AFTER the reading of the | |
837 | * card registers because some SDHC cards are not able | |
838 | * to provide valid CRCs for non-512-byte blocks. | |
839 | */ | |
840 | if (mmc_host_is_spi(host)) { | |
841 | err = mmc_spi_set_crc(host, use_spi_crc); | |
842 | if (err) | |
843 | return err; | |
844 | } | |
845 | ||
846 | /* | |
847 | * Check if read-only switch is active. | |
848 | */ | |
849 | if (!reinit) { | |
850 | int ro = -1; | |
851 | ||
852 | if (host->ops->get_ro) | |
853 | ro = host->ops->get_ro(host); | |
854 | ||
855 | if (ro < 0) { | |
a3c76eb9 | 856 | pr_warning("%s: host does not " |
71578a1e MM |
857 | "support reading read-only " |
858 | "switch. assuming write-enable.\n", | |
859 | mmc_hostname(host)); | |
860 | } else if (ro > 0) { | |
861 | mmc_card_set_readonly(card); | |
adf66a0d | 862 | } |
71578a1e MM |
863 | } |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
869 | { | |
870 | unsigned max_dtr = (unsigned int)-1; | |
871 | ||
872 | if (mmc_card_highspeed(card)) { | |
873 | if (max_dtr > card->sw_caps.hs_max_dtr) | |
874 | max_dtr = card->sw_caps.hs_max_dtr; | |
875 | } else if (max_dtr > card->csd.max_dtr) { | |
876 | max_dtr = card->csd.max_dtr; | |
877 | } | |
878 | ||
879 | return max_dtr; | |
880 | } | |
881 | ||
882 | void mmc_sd_go_highspeed(struct mmc_card *card) | |
883 | { | |
884 | mmc_card_set_highspeed(card); | |
885 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Handle the detection and initialisation of a card. | |
890 | * | |
891 | * In the case of a resume, "oldcard" will contain the card | |
892 | * we're trying to reinitialise. | |
893 | */ | |
894 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
895 | struct mmc_card *oldcard) | |
896 | { | |
897 | struct mmc_card *card; | |
898 | int err; | |
899 | u32 cid[4]; | |
d6d50a15 | 900 | u32 rocr = 0; |
71578a1e MM |
901 | |
902 | BUG_ON(!host); | |
903 | WARN_ON(!host->claimed); | |
904 | ||
d6d50a15 | 905 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
906 | if (err) |
907 | return err; | |
908 | ||
909 | if (oldcard) { | |
910 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
911 | return -ENOENT; | |
7ea239d9 | 912 | |
6abaa0c9 PO |
913 | card = oldcard; |
914 | } else { | |
915 | /* | |
916 | * Allocate card structure. | |
917 | */ | |
51ec92e2 | 918 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
919 | if (IS_ERR(card)) |
920 | return PTR_ERR(card); | |
6abaa0c9 PO |
921 | |
922 | card->type = MMC_TYPE_SD; | |
923 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
924 | } | |
7ea239d9 PO |
925 | |
926 | /* | |
af517150 | 927 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 928 | */ |
af517150 DB |
929 | if (!mmc_host_is_spi(host)) { |
930 | err = mmc_send_relative_addr(host, &card->rca); | |
931 | if (err) | |
71578a1e | 932 | return err; |
af517150 | 933 | } |
7ea239d9 | 934 | |
6abaa0c9 | 935 | if (!oldcard) { |
71578a1e | 936 | err = mmc_sd_get_csd(host, card); |
17b0429d | 937 | if (err) |
71578a1e | 938 | return err; |
bd766312 | 939 | |
6abaa0c9 PO |
940 | mmc_decode_cid(card); |
941 | } | |
7ea239d9 PO |
942 | |
943 | /* | |
6abaa0c9 | 944 | * Select card, as all following commands rely on that. |
7ea239d9 | 945 | */ |
af517150 DB |
946 | if (!mmc_host_is_spi(host)) { |
947 | err = mmc_select_card(card); | |
948 | if (err) | |
71578a1e | 949 | return err; |
6abaa0c9 | 950 | } |
1addfcdb | 951 | |
71578a1e MM |
952 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
953 | if (err) | |
954 | goto free_card; | |
9d9f25c0 | 955 | |
d6d50a15 AN |
956 | /* Initialization sequence for UHS-I cards */ |
957 | if (rocr & SD_ROCR_S18A) { | |
958 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 959 | if (err) |
7ea239d9 | 960 | goto free_card; |
3a303511 AN |
961 | |
962 | /* Card is an ultra-high-speed card */ | |
963 | mmc_sd_card_set_uhs(card); | |
4d55c5a1 AN |
964 | |
965 | /* | |
966 | * Since initialization is now complete, enable preset | |
967 | * value registers for UHS-I cards. | |
968 | */ | |
969 | if (host->ops->enable_preset_value) | |
970 | host->ops->enable_preset_value(host, true); | |
d6d50a15 AN |
971 | } else { |
972 | /* | |
973 | * Attempt to change to high-speed (if supported) | |
974 | */ | |
975 | err = mmc_sd_switch_hs(card); | |
976 | if (err > 0) | |
977 | mmc_sd_go_highspeed(card); | |
978 | else if (err) | |
979 | goto free_card; | |
980 | ||
981 | /* | |
982 | * Set bus speed. | |
983 | */ | |
984 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 985 | |
d6d50a15 AN |
986 | /* |
987 | * Switch to wider bus (if supported). | |
988 | */ | |
989 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
990 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
991 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
992 | if (err) | |
993 | goto free_card; | |
994 | ||
995 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
996 | } | |
7ea239d9 PO |
997 | } |
998 | ||
71578a1e | 999 | host->card = card; |
17b0429d | 1000 | return 0; |
6abaa0c9 PO |
1001 | |
1002 | free_card: | |
1003 | if (!oldcard) | |
1004 | mmc_remove_card(card); | |
6abaa0c9 | 1005 | |
adf66a0d | 1006 | return err; |
6abaa0c9 PO |
1007 | } |
1008 | ||
1009 | /* | |
1010 | * Host is being removed. Free up the current card. | |
1011 | */ | |
1012 | static void mmc_sd_remove(struct mmc_host *host) | |
1013 | { | |
1014 | BUG_ON(!host); | |
1015 | BUG_ON(!host->card); | |
1016 | ||
1017 | mmc_remove_card(host->card); | |
1018 | host->card = NULL; | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Card detection callback from host. | |
1023 | */ | |
1024 | static void mmc_sd_detect(struct mmc_host *host) | |
1025 | { | |
1026 | int err; | |
1027 | ||
1028 | BUG_ON(!host); | |
1029 | BUG_ON(!host->card); | |
1030 | ||
1031 | mmc_claim_host(host); | |
1032 | ||
1033 | /* | |
1034 | * Just check if our card has been removed. | |
1035 | */ | |
1036 | err = mmc_send_status(host->card, NULL); | |
7ea239d9 PO |
1037 | |
1038 | mmc_release_host(host); | |
1039 | ||
17b0429d | 1040 | if (err) { |
4101c16a | 1041 | mmc_sd_remove(host); |
6abaa0c9 PO |
1042 | |
1043 | mmc_claim_host(host); | |
1044 | mmc_detach_bus(host); | |
7f7e4129 | 1045 | mmc_power_off(host); |
6abaa0c9 PO |
1046 | mmc_release_host(host); |
1047 | } | |
1048 | } | |
1049 | ||
6abaa0c9 PO |
1050 | /* |
1051 | * Suspend callback from host. | |
1052 | */ | |
95cdfb72 | 1053 | static int mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 PO |
1054 | { |
1055 | BUG_ON(!host); | |
1056 | BUG_ON(!host->card); | |
1057 | ||
1058 | mmc_claim_host(host); | |
af517150 DB |
1059 | if (!mmc_host_is_spi(host)) |
1060 | mmc_deselect_cards(host); | |
6abaa0c9 PO |
1061 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
1062 | mmc_release_host(host); | |
95cdfb72 NP |
1063 | |
1064 | return 0; | |
6abaa0c9 PO |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * Resume callback from host. | |
1069 | * | |
1070 | * This function tries to determine if the same card is still present | |
1071 | * and, if so, restore all state to it. | |
1072 | */ | |
95cdfb72 | 1073 | static int mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 PO |
1074 | { |
1075 | int err; | |
1076 | ||
1077 | BUG_ON(!host); | |
1078 | BUG_ON(!host->card); | |
1079 | ||
1080 | mmc_claim_host(host); | |
6abaa0c9 | 1081 | err = mmc_sd_init_card(host, host->ocr, host->card); |
2986d0bf PO |
1082 | mmc_release_host(host); |
1083 | ||
95cdfb72 | 1084 | return err; |
6abaa0c9 PO |
1085 | } |
1086 | ||
12ae637f | 1087 | static int mmc_sd_power_restore(struct mmc_host *host) |
eae1aeee | 1088 | { |
12ae637f OBC |
1089 | int ret; |
1090 | ||
eae1aeee AH |
1091 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
1092 | mmc_claim_host(host); | |
12ae637f | 1093 | ret = mmc_sd_init_card(host, host->ocr, host->card); |
eae1aeee | 1094 | mmc_release_host(host); |
12ae637f OBC |
1095 | |
1096 | return ret; | |
eae1aeee AH |
1097 | } |
1098 | ||
6abaa0c9 | 1099 | static const struct mmc_bus_ops mmc_sd_ops = { |
9feae246 AH |
1100 | .remove = mmc_sd_remove, |
1101 | .detect = mmc_sd_detect, | |
1102 | .suspend = NULL, | |
1103 | .resume = NULL, | |
eae1aeee | 1104 | .power_restore = mmc_sd_power_restore, |
9feae246 AH |
1105 | }; |
1106 | ||
1107 | static const struct mmc_bus_ops mmc_sd_ops_unsafe = { | |
6abaa0c9 PO |
1108 | .remove = mmc_sd_remove, |
1109 | .detect = mmc_sd_detect, | |
1110 | .suspend = mmc_sd_suspend, | |
1111 | .resume = mmc_sd_resume, | |
eae1aeee | 1112 | .power_restore = mmc_sd_power_restore, |
6abaa0c9 PO |
1113 | }; |
1114 | ||
9feae246 AH |
1115 | static void mmc_sd_attach_bus_ops(struct mmc_host *host) |
1116 | { | |
1117 | const struct mmc_bus_ops *bus_ops; | |
1118 | ||
71d7d3d1 | 1119 | if (!mmc_card_is_removable(host)) |
9feae246 AH |
1120 | bus_ops = &mmc_sd_ops_unsafe; |
1121 | else | |
1122 | bus_ops = &mmc_sd_ops; | |
1123 | mmc_attach_bus(host, bus_ops); | |
1124 | } | |
1125 | ||
6abaa0c9 PO |
1126 | /* |
1127 | * Starting point for SD card init. | |
1128 | */ | |
807e8e40 | 1129 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1130 | { |
1131 | int err; | |
807e8e40 | 1132 | u32 ocr; |
6abaa0c9 PO |
1133 | |
1134 | BUG_ON(!host); | |
d84075c8 | 1135 | WARN_ON(!host->claimed); |
6abaa0c9 | 1136 | |
f2119df6 | 1137 | /* Make sure we are at 3.3V signalling voltage */ |
261bbd46 | 1138 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false); |
f2119df6 AN |
1139 | if (err) |
1140 | return err; | |
1141 | ||
4d55c5a1 AN |
1142 | /* Disable preset value enable if already set since last time */ |
1143 | if (host->ops->enable_preset_value) | |
1144 | host->ops->enable_preset_value(host, false); | |
1145 | ||
807e8e40 AR |
1146 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1147 | if (err) | |
1148 | return err; | |
1149 | ||
9feae246 | 1150 | mmc_sd_attach_bus_ops(host); |
8f230f45 TI |
1151 | if (host->ocr_avail_sd) |
1152 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1153 | |
af517150 DB |
1154 | /* |
1155 | * We need to get OCR a different way for SPI. | |
1156 | */ | |
1157 | if (mmc_host_is_spi(host)) { | |
1158 | mmc_go_idle(host); | |
1159 | ||
1160 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1161 | if (err) | |
1162 | goto err; | |
1163 | } | |
1164 | ||
6abaa0c9 PO |
1165 | /* |
1166 | * Sanity check the voltages that the card claims to | |
1167 | * support. | |
1168 | */ | |
1169 | if (ocr & 0x7F) { | |
a3c76eb9 | 1170 | pr_warning("%s: card claims to support voltages " |
6abaa0c9 PO |
1171 | "below the defined range. These will be ignored.\n", |
1172 | mmc_hostname(host)); | |
1173 | ocr &= ~0x7F; | |
1174 | } | |
1175 | ||
8f230f45 TI |
1176 | if ((ocr & MMC_VDD_165_195) && |
1177 | !(host->ocr_avail_sd & MMC_VDD_165_195)) { | |
a3c76eb9 | 1178 | pr_warning("%s: SD card claims to support the " |
6abaa0c9 PO |
1179 | "incompletely defined 'low voltage range'. This " |
1180 | "will be ignored.\n", mmc_hostname(host)); | |
1181 | ocr &= ~MMC_VDD_165_195; | |
1182 | } | |
1183 | ||
1184 | host->ocr = mmc_select_voltage(host, ocr); | |
1185 | ||
1186 | /* | |
1187 | * Can we support the voltage(s) of the card(s)? | |
1188 | */ | |
109b5bed PO |
1189 | if (!host->ocr) { |
1190 | err = -EINVAL; | |
6abaa0c9 | 1191 | goto err; |
109b5bed | 1192 | } |
6abaa0c9 PO |
1193 | |
1194 | /* | |
1195 | * Detect and init the card. | |
1196 | */ | |
1197 | err = mmc_sd_init_card(host, host->ocr, NULL); | |
17b0429d | 1198 | if (err) |
6abaa0c9 PO |
1199 | goto err; |
1200 | ||
1201 | mmc_release_host(host); | |
4101c16a | 1202 | err = mmc_add_card(host->card); |
807e8e40 | 1203 | mmc_claim_host(host); |
7ea239d9 | 1204 | if (err) |
2986d0bf | 1205 | goto remove_card; |
7ea239d9 PO |
1206 | |
1207 | return 0; | |
1208 | ||
2986d0bf | 1209 | remove_card: |
807e8e40 | 1210 | mmc_release_host(host); |
6abaa0c9 | 1211 | mmc_remove_card(host->card); |
7ea239d9 | 1212 | host->card = NULL; |
2986d0bf | 1213 | mmc_claim_host(host); |
7ea239d9 PO |
1214 | err: |
1215 | mmc_detach_bus(host); | |
7ea239d9 | 1216 | |
a3c76eb9 | 1217 | pr_err("%s: error %d whilst initialising SD card\n", |
109b5bed PO |
1218 | mmc_hostname(host), err); |
1219 | ||
adf66a0d | 1220 | return err; |
7ea239d9 PO |
1221 | } |
1222 |