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> |
7ea239d9 PO |
15 | |
16 | #include <linux/mmc/host.h> | |
17 | #include <linux/mmc/card.h> | |
18 | #include <linux/mmc/mmc.h> | |
3373c0ae | 19 | #include <linux/mmc/sd.h> |
7ea239d9 PO |
20 | |
21 | #include "core.h" | |
4101c16a | 22 | #include "bus.h" |
7ea239d9 | 23 | #include "mmc_ops.h" |
ce101496 | 24 | #include "sd.h" |
7ea239d9 PO |
25 | #include "sd_ops.h" |
26 | ||
7ea239d9 PO |
27 | static const unsigned int tran_exp[] = { |
28 | 10000, 100000, 1000000, 10000000, | |
29 | 0, 0, 0, 0 | |
30 | }; | |
31 | ||
32 | static const unsigned char tran_mant[] = { | |
33 | 0, 10, 12, 13, 15, 20, 25, 30, | |
34 | 35, 40, 45, 50, 55, 60, 70, 80, | |
35 | }; | |
36 | ||
37 | static const unsigned int tacc_exp[] = { | |
38 | 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, | |
39 | }; | |
40 | ||
41 | static const unsigned int tacc_mant[] = { | |
42 | 0, 10, 12, 13, 15, 20, 25, 30, | |
43 | 35, 40, 45, 50, 55, 60, 70, 80, | |
44 | }; | |
45 | ||
46 | #define UNSTUFF_BITS(resp,start,size) \ | |
47 | ({ \ | |
48 | const int __size = size; \ | |
49 | const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ | |
50 | const int __off = 3 - ((start) / 32); \ | |
51 | const int __shft = (start) & 31; \ | |
52 | u32 __res; \ | |
53 | \ | |
54 | __res = resp[__off] >> __shft; \ | |
55 | if (__size + __shft > 32) \ | |
56 | __res |= resp[__off-1] << ((32 - __shft) % 32); \ | |
57 | __res & __mask; \ | |
58 | }) | |
59 | ||
60 | /* | |
61 | * Given the decoded CSD structure, decode the raw CID to our CID structure. | |
62 | */ | |
71578a1e | 63 | void mmc_decode_cid(struct mmc_card *card) |
7ea239d9 PO |
64 | { |
65 | u32 *resp = card->raw_cid; | |
66 | ||
67 | memset(&card->cid, 0, sizeof(struct mmc_cid)); | |
68 | ||
69 | /* | |
70 | * SD doesn't currently have a version field so we will | |
71 | * have to assume we can parse this. | |
72 | */ | |
73 | card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); | |
74 | card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); | |
75 | card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); | |
76 | card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); | |
77 | card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); | |
78 | card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); | |
79 | card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); | |
80 | card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); | |
81 | card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); | |
82 | card->cid.serial = UNSTUFF_BITS(resp, 24, 32); | |
83 | card->cid.year = UNSTUFF_BITS(resp, 12, 8); | |
84 | card->cid.month = UNSTUFF_BITS(resp, 8, 4); | |
85 | ||
86 | card->cid.year += 2000; /* SD cards year offset */ | |
87 | } | |
88 | ||
89 | /* | |
90 | * Given a 128-bit response, decode to our card CSD structure. | |
91 | */ | |
bd766312 | 92 | static int mmc_decode_csd(struct mmc_card *card) |
7ea239d9 PO |
93 | { |
94 | struct mmc_csd *csd = &card->csd; | |
95 | unsigned int e, m, csd_struct; | |
96 | u32 *resp = card->raw_csd; | |
97 | ||
98 | csd_struct = UNSTUFF_BITS(resp, 126, 2); | |
99 | ||
100 | switch (csd_struct) { | |
101 | case 0: | |
102 | m = UNSTUFF_BITS(resp, 115, 4); | |
103 | e = UNSTUFF_BITS(resp, 112, 3); | |
104 | csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; | |
105 | csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; | |
106 | ||
107 | m = UNSTUFF_BITS(resp, 99, 4); | |
108 | e = UNSTUFF_BITS(resp, 96, 3); | |
109 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
110 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
111 | ||
112 | e = UNSTUFF_BITS(resp, 47, 3); | |
113 | m = UNSTUFF_BITS(resp, 62, 12); | |
114 | csd->capacity = (1 + m) << (e + 2); | |
115 | ||
116 | csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); | |
117 | csd->read_partial = UNSTUFF_BITS(resp, 79, 1); | |
118 | csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); | |
119 | csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); | |
120 | csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); | |
121 | csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); | |
122 | csd->write_partial = UNSTUFF_BITS(resp, 21, 1); | |
dfe86cba AH |
123 | |
124 | if (UNSTUFF_BITS(resp, 46, 1)) { | |
125 | csd->erase_size = 1; | |
126 | } else if (csd->write_blkbits >= 9) { | |
127 | csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1; | |
128 | csd->erase_size <<= csd->write_blkbits - 9; | |
129 | } | |
7ea239d9 PO |
130 | break; |
131 | case 1: | |
132 | /* | |
3a303511 | 133 | * This is a block-addressed SDHC or SDXC card. Most |
7ea239d9 PO |
134 | * interesting fields are unused and have fixed |
135 | * values. To avoid getting tripped by buggy cards, | |
136 | * we assume those fixed values ourselves. | |
137 | */ | |
138 | mmc_card_set_blockaddr(card); | |
139 | ||
140 | csd->tacc_ns = 0; /* Unused */ | |
141 | csd->tacc_clks = 0; /* Unused */ | |
142 | ||
143 | m = UNSTUFF_BITS(resp, 99, 4); | |
144 | e = UNSTUFF_BITS(resp, 96, 3); | |
145 | csd->max_dtr = tran_exp[e] * tran_mant[m]; | |
146 | csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); | |
3a303511 AN |
147 | csd->c_size = UNSTUFF_BITS(resp, 48, 22); |
148 | ||
149 | /* SDXC cards have a minimum C_SIZE of 0x00FFFF */ | |
150 | if (csd->c_size >= 0xFFFF) | |
151 | mmc_card_set_ext_capacity(card); | |
7ea239d9 PO |
152 | |
153 | m = UNSTUFF_BITS(resp, 48, 22); | |
154 | csd->capacity = (1 + m) << 10; | |
155 | ||
156 | csd->read_blkbits = 9; | |
157 | csd->read_partial = 0; | |
158 | csd->write_misalign = 0; | |
159 | csd->read_misalign = 0; | |
160 | csd->r2w_factor = 4; /* Unused */ | |
161 | csd->write_blkbits = 9; | |
162 | csd->write_partial = 0; | |
dfe86cba | 163 | csd->erase_size = 1; |
7ea239d9 PO |
164 | break; |
165 | default: | |
facba917 | 166 | printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 167 | mmc_hostname(card->host), csd_struct); |
bd766312 | 168 | return -EINVAL; |
7ea239d9 | 169 | } |
bd766312 | 170 | |
dfe86cba AH |
171 | card->erase_size = csd->erase_size; |
172 | ||
bd766312 | 173 | return 0; |
7ea239d9 PO |
174 | } |
175 | ||
176 | /* | |
177 | * Given a 64-bit response, decode to our card SCR structure. | |
178 | */ | |
bd766312 | 179 | static int mmc_decode_scr(struct mmc_card *card) |
7ea239d9 PO |
180 | { |
181 | struct sd_scr *scr = &card->scr; | |
182 | unsigned int scr_struct; | |
183 | u32 resp[4]; | |
184 | ||
7ea239d9 PO |
185 | resp[3] = card->raw_scr[1]; |
186 | resp[2] = card->raw_scr[0]; | |
187 | ||
188 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
189 | if (scr_struct != 0) { | |
facba917 | 190 | printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", |
7ea239d9 | 191 | mmc_hostname(card->host), scr_struct); |
bd766312 | 192 | return -EINVAL; |
7ea239d9 PO |
193 | } |
194 | ||
195 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
196 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
013909c4 AN |
197 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
198 | /* Check if Physical Layer Spec v3.0 is supported */ | |
199 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); | |
bd766312 | 200 | |
dfe86cba AH |
201 | if (UNSTUFF_BITS(resp, 55, 1)) |
202 | card->erased_byte = 0xFF; | |
203 | else | |
204 | card->erased_byte = 0x0; | |
205 | ||
f0d89972 AW |
206 | if (scr->sda_spec3) |
207 | scr->cmds = UNSTUFF_BITS(resp, 32, 2); | |
bd766312 | 208 | return 0; |
7ea239d9 PO |
209 | } |
210 | ||
dfe86cba AH |
211 | /* |
212 | * Fetch and process SD Status register. | |
213 | */ | |
214 | static int mmc_read_ssr(struct mmc_card *card) | |
215 | { | |
216 | unsigned int au, es, et, eo; | |
217 | int err, i; | |
218 | u32 *ssr; | |
219 | ||
220 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
221 | printk(KERN_WARNING "%s: card lacks mandatory SD Status " | |
222 | "function.\n", mmc_hostname(card->host)); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | ssr = kmalloc(64, GFP_KERNEL); | |
227 | if (!ssr) | |
228 | return -ENOMEM; | |
229 | ||
230 | err = mmc_app_sd_status(card, ssr); | |
231 | if (err) { | |
232 | printk(KERN_WARNING "%s: problem reading SD Status " | |
233 | "register.\n", mmc_hostname(card->host)); | |
234 | err = 0; | |
235 | goto out; | |
236 | } | |
237 | ||
238 | for (i = 0; i < 16; i++) | |
239 | ssr[i] = be32_to_cpu(ssr[i]); | |
240 | ||
241 | /* | |
242 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
243 | * bitfield positions accordingly. | |
244 | */ | |
245 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); | |
246 | if (au > 0 || au <= 9) { | |
247 | card->ssr.au = 1 << (au + 4); | |
248 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); | |
249 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); | |
250 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); | |
251 | if (es && et) { | |
252 | card->ssr.erase_timeout = (et * 1000) / es; | |
253 | card->ssr.erase_offset = eo * 1000; | |
254 | } | |
255 | } else { | |
256 | printk(KERN_WARNING "%s: SD Status: Invalid Allocation Unit " | |
257 | "size.\n", mmc_hostname(card->host)); | |
258 | } | |
259 | out: | |
260 | kfree(ssr); | |
261 | return err; | |
262 | } | |
263 | ||
7ea239d9 | 264 | /* |
1addfcdb | 265 | * Fetches and decodes switch information |
7ea239d9 | 266 | */ |
1addfcdb | 267 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
268 | { |
269 | int err; | |
270 | u8 *status; | |
271 | ||
3373c0ae | 272 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 273 | return 0; |
3373c0ae PO |
274 | |
275 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
276 | printk(KERN_WARNING "%s: card lacks mandatory switch " | |
277 | "function, performance might suffer.\n", | |
278 | mmc_hostname(card->host)); | |
17b0429d | 279 | return 0; |
3373c0ae PO |
280 | } |
281 | ||
17b0429d | 282 | err = -EIO; |
7ea239d9 PO |
283 | |
284 | status = kmalloc(64, GFP_KERNEL); | |
285 | if (!status) { | |
facba917 | 286 | printk(KERN_ERR "%s: could not allocate a buffer for " |
013909c4 AN |
287 | "switch capabilities.\n", |
288 | mmc_hostname(card->host)); | |
17b0429d | 289 | return -ENOMEM; |
7ea239d9 PO |
290 | } |
291 | ||
013909c4 | 292 | /* Find out the supported Bus Speed Modes. */ |
7ea239d9 | 293 | err = mmc_sd_switch(card, 0, 0, 1, status); |
17b0429d | 294 | if (err) { |
013909c4 AN |
295 | /* |
296 | * If the host or the card can't do the switch, | |
297 | * fail more gracefully. | |
298 | */ | |
299 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
300 | goto out; |
301 | ||
013909c4 | 302 | printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n", |
3373c0ae | 303 | mmc_hostname(card->host)); |
17b0429d | 304 | err = 0; |
adf66a0d | 305 | |
7ea239d9 PO |
306 | goto out; |
307 | } | |
308 | ||
013909c4 AN |
309 | if (card->scr.sda_spec3) { |
310 | card->sw_caps.sd3_bus_mode = status[13]; | |
311 | ||
312 | /* Find out Driver Strengths supported by the card */ | |
313 | err = mmc_sd_switch(card, 0, 2, 1, status); | |
314 | if (err) { | |
315 | /* | |
316 | * If the host or the card can't do the switch, | |
317 | * fail more gracefully. | |
318 | */ | |
319 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
320 | goto out; | |
321 | ||
322 | printk(KERN_WARNING "%s: problem reading " | |
323 | "Driver Strength.\n", | |
324 | mmc_hostname(card->host)); | |
325 | err = 0; | |
326 | ||
327 | goto out; | |
328 | } | |
329 | ||
330 | card->sw_caps.sd3_drv_type = status[9]; | |
331 | ||
332 | /* Find out Current Limits supported by the card */ | |
333 | err = mmc_sd_switch(card, 0, 3, 1, status); | |
334 | if (err) { | |
335 | /* | |
336 | * If the host or the card can't do the switch, | |
337 | * fail more gracefully. | |
338 | */ | |
339 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
340 | goto out; | |
341 | ||
342 | printk(KERN_WARNING "%s: problem reading " | |
343 | "Current Limit.\n", | |
344 | mmc_hostname(card->host)); | |
345 | err = 0; | |
346 | ||
347 | goto out; | |
348 | } | |
349 | ||
350 | card->sw_caps.sd3_curr_limit = status[7]; | |
351 | } else { | |
352 | if (status[13] & 0x02) | |
353 | card->sw_caps.hs_max_dtr = 50000000; | |
354 | } | |
7ea239d9 | 355 | |
1addfcdb PO |
356 | out: |
357 | kfree(status); | |
358 | ||
359 | return err; | |
360 | } | |
361 | ||
362 | /* | |
363 | * Test if the card supports high-speed mode and, if so, switch to it. | |
364 | */ | |
71578a1e | 365 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
366 | { |
367 | int err; | |
368 | u8 *status; | |
369 | ||
3373c0ae | 370 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 371 | return 0; |
3373c0ae PO |
372 | |
373 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 374 | return 0; |
3373c0ae | 375 | |
1addfcdb | 376 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 377 | return 0; |
1addfcdb PO |
378 | |
379 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 380 | return 0; |
1addfcdb | 381 | |
17b0429d | 382 | err = -EIO; |
1addfcdb PO |
383 | |
384 | status = kmalloc(64, GFP_KERNEL); | |
385 | if (!status) { | |
facba917 PO |
386 | printk(KERN_ERR "%s: could not allocate a buffer for " |
387 | "switch capabilities.\n", mmc_hostname(card->host)); | |
17b0429d | 388 | return -ENOMEM; |
1addfcdb PO |
389 | } |
390 | ||
7ea239d9 | 391 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 392 | if (err) |
7ea239d9 PO |
393 | goto out; |
394 | ||
395 | if ((status[16] & 0xF) != 1) { | |
396 | printk(KERN_WARNING "%s: Problem switching card " | |
397 | "into high-speed mode!\n", | |
398 | mmc_hostname(card->host)); | |
71578a1e | 399 | err = 0; |
7ea239d9 | 400 | } else { |
71578a1e | 401 | err = 1; |
7ea239d9 PO |
402 | } |
403 | ||
404 | out: | |
405 | kfree(status); | |
406 | ||
407 | return err; | |
408 | } | |
409 | ||
d6d50a15 AN |
410 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
411 | { | |
ca8e99b3 PR |
412 | int host_drv_type = SD_DRIVER_TYPE_B; |
413 | int card_drv_type = SD_DRIVER_TYPE_B; | |
414 | int drive_strength; | |
d6d50a15 AN |
415 | int err; |
416 | ||
417 | /* | |
418 | * If the host doesn't support any of the Driver Types A,C or D, | |
ca8e99b3 PR |
419 | * or there is no board specific handler then default Driver |
420 | * Type B is used. | |
d6d50a15 AN |
421 | */ |
422 | if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C | |
423 | | MMC_CAP_DRIVER_TYPE_D))) | |
424 | return 0; | |
425 | ||
ca8e99b3 PR |
426 | if (!card->host->ops->select_drive_strength) |
427 | return 0; | |
428 | ||
429 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) | |
430 | host_drv_type |= SD_DRIVER_TYPE_A; | |
431 | ||
432 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) | |
433 | host_drv_type |= SD_DRIVER_TYPE_C; | |
434 | ||
435 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) | |
436 | host_drv_type |= SD_DRIVER_TYPE_D; | |
437 | ||
438 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) | |
439 | card_drv_type |= SD_DRIVER_TYPE_A; | |
440 | ||
441 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
442 | card_drv_type |= SD_DRIVER_TYPE_C; | |
443 | ||
444 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) | |
445 | card_drv_type |= SD_DRIVER_TYPE_D; | |
446 | ||
447 | /* | |
448 | * The drive strength that the hardware can support | |
449 | * depends on the board design. Pass the appropriate | |
450 | * information and let the hardware specific code | |
451 | * return what is possible given the options | |
452 | */ | |
453 | drive_strength = card->host->ops->select_drive_strength( | |
454 | card->sw_caps.uhs_max_dtr, | |
455 | host_drv_type, card_drv_type); | |
d6d50a15 | 456 | |
ca8e99b3 | 457 | err = mmc_sd_switch(card, 1, 2, drive_strength, status); |
d6d50a15 AN |
458 | if (err) |
459 | return err; | |
460 | ||
ca8e99b3 PR |
461 | if ((status[15] & 0xF) != drive_strength) { |
462 | printk(KERN_WARNING "%s: Problem setting drive strength!\n", | |
d6d50a15 AN |
463 | mmc_hostname(card->host)); |
464 | return 0; | |
465 | } | |
466 | ||
ca8e99b3 | 467 | mmc_set_driver_type(card->host, drive_strength); |
d6d50a15 AN |
468 | |
469 | return 0; | |
470 | } | |
471 | ||
93c712f9 | 472 | static void sd_update_bus_speed_mode(struct mmc_card *card) |
49c468fc | 473 | { |
49c468fc AN |
474 | /* |
475 | * If the host doesn't support any of the UHS-I modes, fallback on | |
476 | * default speed. | |
477 | */ | |
478 | if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | | |
93c712f9 SJ |
479 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))) { |
480 | card->sd_bus_speed = 0; | |
481 | return; | |
482 | } | |
49c468fc AN |
483 | |
484 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
485 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
93c712f9 | 486 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
49c468fc AN |
487 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
488 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
93c712f9 | 489 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
49c468fc AN |
490 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
491 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
492 | SD_MODE_UHS_SDR50)) { | |
93c712f9 | 493 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
49c468fc AN |
494 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
495 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
496 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
93c712f9 | 497 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
49c468fc AN |
498 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
499 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
500 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
501 | SD_MODE_UHS_SDR12)) { | |
93c712f9 SJ |
502 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
503 | } | |
504 | } | |
505 | ||
506 | static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status) | |
507 | { | |
508 | int err; | |
509 | unsigned int timing = 0; | |
510 | ||
511 | switch (card->sd_bus_speed) { | |
512 | case UHS_SDR104_BUS_SPEED: | |
513 | timing = MMC_TIMING_UHS_SDR104; | |
514 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
515 | break; | |
516 | case UHS_DDR50_BUS_SPEED: | |
517 | timing = MMC_TIMING_UHS_DDR50; | |
518 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
519 | break; | |
520 | case UHS_SDR50_BUS_SPEED: | |
521 | timing = MMC_TIMING_UHS_SDR50; | |
522 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
523 | break; | |
524 | case UHS_SDR25_BUS_SPEED: | |
525 | timing = MMC_TIMING_UHS_SDR25; | |
526 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
527 | break; | |
528 | case UHS_SDR12_BUS_SPEED: | |
529 | timing = MMC_TIMING_UHS_SDR12; | |
530 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
531 | break; | |
532 | default: | |
533 | return 0; | |
49c468fc AN |
534 | } |
535 | ||
93c712f9 | 536 | err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status); |
49c468fc AN |
537 | if (err) |
538 | return err; | |
539 | ||
93c712f9 | 540 | if ((status[16] & 0xF) != card->sd_bus_speed) |
49c468fc AN |
541 | printk(KERN_WARNING "%s: Problem setting bus speed mode!\n", |
542 | mmc_hostname(card->host)); | |
543 | else { | |
544 | mmc_set_timing(card->host, timing); | |
545 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
546 | } | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
5371c927 AN |
551 | static int sd_set_current_limit(struct mmc_card *card, u8 *status) |
552 | { | |
553 | int current_limit = 0; | |
554 | int err; | |
555 | ||
556 | /* | |
557 | * Current limit switch is only defined for SDR50, SDR104, and DDR50 | |
558 | * bus speed modes. For other bus speed modes, we set the default | |
559 | * current limit of 200mA. | |
560 | */ | |
561 | if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) || | |
562 | (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) || | |
563 | (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) { | |
564 | if (card->host->caps & MMC_CAP_MAX_CURRENT_800) { | |
565 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800) | |
566 | current_limit = SD_SET_CURRENT_LIMIT_800; | |
567 | else if (card->sw_caps.sd3_curr_limit & | |
568 | SD_MAX_CURRENT_600) | |
569 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
570 | else if (card->sw_caps.sd3_curr_limit & | |
571 | SD_MAX_CURRENT_400) | |
572 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
573 | else if (card->sw_caps.sd3_curr_limit & | |
574 | SD_MAX_CURRENT_200) | |
575 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
576 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) { | |
577 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600) | |
578 | current_limit = SD_SET_CURRENT_LIMIT_600; | |
579 | else if (card->sw_caps.sd3_curr_limit & | |
580 | SD_MAX_CURRENT_400) | |
581 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
582 | else if (card->sw_caps.sd3_curr_limit & | |
583 | SD_MAX_CURRENT_200) | |
584 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
585 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) { | |
586 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400) | |
587 | current_limit = SD_SET_CURRENT_LIMIT_400; | |
588 | else if (card->sw_caps.sd3_curr_limit & | |
589 | SD_MAX_CURRENT_200) | |
590 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
591 | } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) { | |
592 | if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200) | |
593 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
594 | } | |
595 | } else | |
596 | current_limit = SD_SET_CURRENT_LIMIT_200; | |
597 | ||
598 | err = mmc_sd_switch(card, 1, 3, current_limit, status); | |
599 | if (err) | |
600 | return err; | |
601 | ||
602 | if (((status[15] >> 4) & 0x0F) != current_limit) | |
603 | printk(KERN_WARNING "%s: Problem setting current limit!\n", | |
604 | mmc_hostname(card->host)); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
d6d50a15 AN |
609 | /* |
610 | * UHS-I specific initialization procedure | |
611 | */ | |
612 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
613 | { | |
614 | int err; | |
615 | u8 *status; | |
616 | ||
617 | if (!card->scr.sda_spec3) | |
618 | return 0; | |
619 | ||
620 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
621 | return 0; | |
622 | ||
623 | status = kmalloc(64, GFP_KERNEL); | |
624 | if (!status) { | |
625 | printk(KERN_ERR "%s: could not allocate a buffer for " | |
626 | "switch capabilities.\n", mmc_hostname(card->host)); | |
627 | return -ENOMEM; | |
628 | } | |
629 | ||
630 | /* Set 4-bit bus width */ | |
631 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
632 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
633 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
634 | if (err) | |
635 | goto out; | |
636 | ||
637 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
638 | } | |
639 | ||
93c712f9 SJ |
640 | /* |
641 | * Select the bus speed mode depending on host | |
642 | * and card capability. | |
643 | */ | |
644 | sd_update_bus_speed_mode(card); | |
645 | ||
d6d50a15 AN |
646 | /* Set the driver strength for the card */ |
647 | err = sd_select_driver_type(card, status); | |
49c468fc AN |
648 | if (err) |
649 | goto out; | |
650 | ||
93c712f9 SJ |
651 | /* Set current limit for the card */ |
652 | err = sd_set_current_limit(card, status); | |
5371c927 AN |
653 | if (err) |
654 | goto out; | |
655 | ||
93c712f9 SJ |
656 | /* Set bus speed mode of the card */ |
657 | err = sd_set_bus_speed_mode(card, status); | |
b513ea25 AN |
658 | if (err) |
659 | goto out; | |
660 | ||
661 | /* SPI mode doesn't define CMD19 */ | |
662 | if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning) | |
663 | err = card->host->ops->execute_tuning(card->host); | |
d6d50a15 AN |
664 | |
665 | out: | |
666 | kfree(status); | |
667 | ||
668 | return err; | |
669 | } | |
670 | ||
51ec92e2 PO |
671 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
672 | card->raw_cid[2], card->raw_cid[3]); | |
673 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
674 | card->raw_csd[2], card->raw_csd[3]); | |
675 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
676 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
677 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
678 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
679 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
680 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
681 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
682 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
683 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
684 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
685 | ||
686 | ||
687 | static struct attribute *sd_std_attrs[] = { | |
688 | &dev_attr_cid.attr, | |
689 | &dev_attr_csd.attr, | |
690 | &dev_attr_scr.attr, | |
691 | &dev_attr_date.attr, | |
dfe86cba AH |
692 | &dev_attr_erase_size.attr, |
693 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
694 | &dev_attr_fwrev.attr, |
695 | &dev_attr_hwrev.attr, | |
696 | &dev_attr_manfid.attr, | |
697 | &dev_attr_name.attr, | |
698 | &dev_attr_oemid.attr, | |
699 | &dev_attr_serial.attr, | |
700 | NULL, | |
701 | }; | |
702 | ||
703 | static struct attribute_group sd_std_attr_group = { | |
704 | .attrs = sd_std_attrs, | |
705 | }; | |
706 | ||
a4dbd674 | 707 | static const struct attribute_group *sd_attr_groups[] = { |
51ec92e2 PO |
708 | &sd_std_attr_group, |
709 | NULL, | |
710 | }; | |
711 | ||
71578a1e | 712 | struct device_type sd_type = { |
51ec92e2 PO |
713 | .groups = sd_attr_groups, |
714 | }; | |
715 | ||
7ea239d9 | 716 | /* |
71578a1e | 717 | * Fetch CID from card. |
7ea239d9 | 718 | */ |
d6d50a15 | 719 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 720 | { |
7ea239d9 | 721 | int err; |
7ea239d9 | 722 | |
7ea239d9 PO |
723 | /* |
724 | * Since we're changing the OCR value, we seem to | |
725 | * need to tell some cards to go back to the idle | |
726 | * state. We wait 1ms to give cards time to | |
727 | * respond. | |
728 | */ | |
729 | mmc_go_idle(host); | |
730 | ||
731 | /* | |
732 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
733 | * compliant card and we should set bit 30 | |
734 | * of the ocr to indicate that we can handle | |
735 | * block-addressed SDHC cards. | |
736 | */ | |
6abaa0c9 | 737 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 738 | if (!err) |
f2119df6 | 739 | ocr |= SD_OCR_CCS; |
7ea239d9 | 740 | |
f2119df6 AN |
741 | /* |
742 | * If the host supports one of UHS-I modes, request the card | |
743 | * to switch to 1.8V signaling level. | |
744 | */ | |
745 | if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | | |
746 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)) | |
747 | ocr |= SD_OCR_S18R; | |
748 | ||
749 | /* If the host can supply more than 150mA, XPC should be set to 1. */ | |
750 | if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 | | |
751 | MMC_CAP_SET_XPC_180)) | |
752 | ocr |= SD_OCR_XPC; | |
753 | ||
754 | try_again: | |
d6d50a15 | 755 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 756 | if (err) |
71578a1e | 757 | return err; |
7ea239d9 | 758 | |
f2119df6 AN |
759 | /* |
760 | * In case CCS and S18A in the response is set, start Signal Voltage | |
761 | * Switch procedure. SPI mode doesn't support CMD11. | |
762 | */ | |
d6d50a15 AN |
763 | if (!mmc_host_is_spi(host) && rocr && |
764 | ((*rocr & 0x41000000) == 0x41000000)) { | |
261bbd46 | 765 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true); |
f2119df6 AN |
766 | if (err) { |
767 | ocr &= ~SD_OCR_S18R; | |
768 | goto try_again; | |
769 | } | |
770 | } | |
771 | ||
af517150 DB |
772 | if (mmc_host_is_spi(host)) |
773 | err = mmc_send_cid(host, cid); | |
774 | else | |
775 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
776 | |
777 | return err; | |
778 | } | |
779 | ||
780 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
781 | { | |
782 | int err; | |
783 | ||
784 | /* | |
785 | * Fetch CSD from card. | |
786 | */ | |
787 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 788 | if (err) |
71578a1e | 789 | return err; |
7ea239d9 | 790 | |
71578a1e MM |
791 | err = mmc_decode_csd(card); |
792 | if (err) | |
793 | return err; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, | |
799 | bool reinit) | |
800 | { | |
801 | int err; | |
802 | ||
803 | if (!reinit) { | |
804 | /* | |
805 | * Fetch SCR from card. | |
806 | */ | |
807 | err = mmc_app_send_scr(card, card->raw_scr); | |
808 | if (err) | |
809 | return err; | |
810 | ||
811 | err = mmc_decode_scr(card); | |
812 | if (err) | |
813 | return err; | |
814 | ||
dfe86cba AH |
815 | /* |
816 | * Fetch and process SD Status register. | |
817 | */ | |
818 | err = mmc_read_ssr(card); | |
819 | if (err) | |
820 | return err; | |
821 | ||
822 | /* Erase init depends on CSD and SSR */ | |
823 | mmc_init_erase(card); | |
824 | ||
71578a1e MM |
825 | /* |
826 | * Fetch switch information from card. | |
827 | */ | |
828 | err = mmc_read_switch(card); | |
829 | if (err) | |
830 | return err; | |
831 | } | |
832 | ||
833 | /* | |
834 | * For SPI, enable CRC as appropriate. | |
835 | * This CRC enable is located AFTER the reading of the | |
836 | * card registers because some SDHC cards are not able | |
837 | * to provide valid CRCs for non-512-byte blocks. | |
838 | */ | |
839 | if (mmc_host_is_spi(host)) { | |
840 | err = mmc_spi_set_crc(host, use_spi_crc); | |
841 | if (err) | |
842 | return err; | |
843 | } | |
844 | ||
845 | /* | |
846 | * Check if read-only switch is active. | |
847 | */ | |
848 | if (!reinit) { | |
849 | int ro = -1; | |
850 | ||
851 | if (host->ops->get_ro) | |
852 | ro = host->ops->get_ro(host); | |
853 | ||
854 | if (ro < 0) { | |
855 | printk(KERN_WARNING "%s: host does not " | |
856 | "support reading read-only " | |
857 | "switch. assuming write-enable.\n", | |
858 | mmc_hostname(host)); | |
859 | } else if (ro > 0) { | |
860 | mmc_card_set_readonly(card); | |
adf66a0d | 861 | } |
71578a1e MM |
862 | } |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
868 | { | |
869 | unsigned max_dtr = (unsigned int)-1; | |
870 | ||
871 | if (mmc_card_highspeed(card)) { | |
872 | if (max_dtr > card->sw_caps.hs_max_dtr) | |
873 | max_dtr = card->sw_caps.hs_max_dtr; | |
874 | } else if (max_dtr > card->csd.max_dtr) { | |
875 | max_dtr = card->csd.max_dtr; | |
876 | } | |
877 | ||
878 | return max_dtr; | |
879 | } | |
880 | ||
881 | void mmc_sd_go_highspeed(struct mmc_card *card) | |
882 | { | |
883 | mmc_card_set_highspeed(card); | |
884 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); | |
885 | } | |
886 | ||
887 | /* | |
888 | * Handle the detection and initialisation of a card. | |
889 | * | |
890 | * In the case of a resume, "oldcard" will contain the card | |
891 | * we're trying to reinitialise. | |
892 | */ | |
893 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
894 | struct mmc_card *oldcard) | |
895 | { | |
896 | struct mmc_card *card; | |
897 | int err; | |
898 | u32 cid[4]; | |
d6d50a15 | 899 | u32 rocr = 0; |
71578a1e MM |
900 | |
901 | BUG_ON(!host); | |
902 | WARN_ON(!host->claimed); | |
903 | ||
d6d50a15 | 904 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
905 | if (err) |
906 | return err; | |
907 | ||
908 | if (oldcard) { | |
909 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
910 | return -ENOENT; | |
7ea239d9 | 911 | |
6abaa0c9 PO |
912 | card = oldcard; |
913 | } else { | |
914 | /* | |
915 | * Allocate card structure. | |
916 | */ | |
51ec92e2 | 917 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
918 | if (IS_ERR(card)) |
919 | return PTR_ERR(card); | |
6abaa0c9 PO |
920 | |
921 | card->type = MMC_TYPE_SD; | |
922 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
923 | } | |
7ea239d9 PO |
924 | |
925 | /* | |
af517150 | 926 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 927 | */ |
af517150 DB |
928 | if (!mmc_host_is_spi(host)) { |
929 | err = mmc_send_relative_addr(host, &card->rca); | |
930 | if (err) | |
71578a1e | 931 | return err; |
af517150 | 932 | } |
7ea239d9 | 933 | |
6abaa0c9 | 934 | if (!oldcard) { |
71578a1e | 935 | err = mmc_sd_get_csd(host, card); |
17b0429d | 936 | if (err) |
71578a1e | 937 | return err; |
bd766312 | 938 | |
6abaa0c9 PO |
939 | mmc_decode_cid(card); |
940 | } | |
7ea239d9 PO |
941 | |
942 | /* | |
6abaa0c9 | 943 | * Select card, as all following commands rely on that. |
7ea239d9 | 944 | */ |
af517150 DB |
945 | if (!mmc_host_is_spi(host)) { |
946 | err = mmc_select_card(card); | |
947 | if (err) | |
71578a1e | 948 | return err; |
6abaa0c9 | 949 | } |
1addfcdb | 950 | |
71578a1e MM |
951 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
952 | if (err) | |
953 | goto free_card; | |
9d9f25c0 | 954 | |
d6d50a15 AN |
955 | /* Initialization sequence for UHS-I cards */ |
956 | if (rocr & SD_ROCR_S18A) { | |
957 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 958 | if (err) |
7ea239d9 | 959 | goto free_card; |
3a303511 AN |
960 | |
961 | /* Card is an ultra-high-speed card */ | |
962 | mmc_sd_card_set_uhs(card); | |
4d55c5a1 AN |
963 | |
964 | /* | |
965 | * Since initialization is now complete, enable preset | |
966 | * value registers for UHS-I cards. | |
967 | */ | |
968 | if (host->ops->enable_preset_value) | |
969 | host->ops->enable_preset_value(host, true); | |
d6d50a15 AN |
970 | } else { |
971 | /* | |
972 | * Attempt to change to high-speed (if supported) | |
973 | */ | |
974 | err = mmc_sd_switch_hs(card); | |
975 | if (err > 0) | |
976 | mmc_sd_go_highspeed(card); | |
977 | else if (err) | |
978 | goto free_card; | |
979 | ||
980 | /* | |
981 | * Set bus speed. | |
982 | */ | |
983 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 984 | |
d6d50a15 AN |
985 | /* |
986 | * Switch to wider bus (if supported). | |
987 | */ | |
988 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
989 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
990 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
991 | if (err) | |
992 | goto free_card; | |
993 | ||
994 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
995 | } | |
7ea239d9 PO |
996 | } |
997 | ||
71578a1e | 998 | host->card = card; |
17b0429d | 999 | return 0; |
6abaa0c9 PO |
1000 | |
1001 | free_card: | |
1002 | if (!oldcard) | |
1003 | mmc_remove_card(card); | |
6abaa0c9 | 1004 | |
adf66a0d | 1005 | return err; |
6abaa0c9 PO |
1006 | } |
1007 | ||
1008 | /* | |
1009 | * Host is being removed. Free up the current card. | |
1010 | */ | |
1011 | static void mmc_sd_remove(struct mmc_host *host) | |
1012 | { | |
1013 | BUG_ON(!host); | |
1014 | BUG_ON(!host->card); | |
1015 | ||
1016 | mmc_remove_card(host->card); | |
1017 | host->card = NULL; | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Card detection callback from host. | |
1022 | */ | |
1023 | static void mmc_sd_detect(struct mmc_host *host) | |
1024 | { | |
1025 | int err; | |
1026 | ||
1027 | BUG_ON(!host); | |
1028 | BUG_ON(!host->card); | |
1029 | ||
1030 | mmc_claim_host(host); | |
1031 | ||
1032 | /* | |
1033 | * Just check if our card has been removed. | |
1034 | */ | |
1035 | err = mmc_send_status(host->card, NULL); | |
7ea239d9 PO |
1036 | |
1037 | mmc_release_host(host); | |
1038 | ||
17b0429d | 1039 | if (err) { |
4101c16a | 1040 | mmc_sd_remove(host); |
6abaa0c9 PO |
1041 | |
1042 | mmc_claim_host(host); | |
1043 | mmc_detach_bus(host); | |
7f7e4129 | 1044 | mmc_power_off(host); |
6abaa0c9 PO |
1045 | mmc_release_host(host); |
1046 | } | |
1047 | } | |
1048 | ||
6abaa0c9 PO |
1049 | /* |
1050 | * Suspend callback from host. | |
1051 | */ | |
95cdfb72 | 1052 | static int mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 PO |
1053 | { |
1054 | BUG_ON(!host); | |
1055 | BUG_ON(!host->card); | |
1056 | ||
1057 | mmc_claim_host(host); | |
af517150 DB |
1058 | if (!mmc_host_is_spi(host)) |
1059 | mmc_deselect_cards(host); | |
6abaa0c9 PO |
1060 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
1061 | mmc_release_host(host); | |
95cdfb72 NP |
1062 | |
1063 | return 0; | |
6abaa0c9 PO |
1064 | } |
1065 | ||
1066 | /* | |
1067 | * Resume callback from host. | |
1068 | * | |
1069 | * This function tries to determine if the same card is still present | |
1070 | * and, if so, restore all state to it. | |
1071 | */ | |
95cdfb72 | 1072 | static int mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 PO |
1073 | { |
1074 | int err; | |
1075 | ||
1076 | BUG_ON(!host); | |
1077 | BUG_ON(!host->card); | |
1078 | ||
1079 | mmc_claim_host(host); | |
6abaa0c9 | 1080 | err = mmc_sd_init_card(host, host->ocr, host->card); |
2986d0bf PO |
1081 | mmc_release_host(host); |
1082 | ||
95cdfb72 | 1083 | return err; |
6abaa0c9 PO |
1084 | } |
1085 | ||
12ae637f | 1086 | static int mmc_sd_power_restore(struct mmc_host *host) |
eae1aeee | 1087 | { |
12ae637f OBC |
1088 | int ret; |
1089 | ||
eae1aeee AH |
1090 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
1091 | mmc_claim_host(host); | |
12ae637f | 1092 | ret = mmc_sd_init_card(host, host->ocr, host->card); |
eae1aeee | 1093 | mmc_release_host(host); |
12ae637f OBC |
1094 | |
1095 | return ret; | |
eae1aeee AH |
1096 | } |
1097 | ||
6abaa0c9 | 1098 | static const struct mmc_bus_ops mmc_sd_ops = { |
9feae246 AH |
1099 | .remove = mmc_sd_remove, |
1100 | .detect = mmc_sd_detect, | |
1101 | .suspend = NULL, | |
1102 | .resume = NULL, | |
eae1aeee | 1103 | .power_restore = mmc_sd_power_restore, |
9feae246 AH |
1104 | }; |
1105 | ||
1106 | static const struct mmc_bus_ops mmc_sd_ops_unsafe = { | |
6abaa0c9 PO |
1107 | .remove = mmc_sd_remove, |
1108 | .detect = mmc_sd_detect, | |
1109 | .suspend = mmc_sd_suspend, | |
1110 | .resume = mmc_sd_resume, | |
eae1aeee | 1111 | .power_restore = mmc_sd_power_restore, |
6abaa0c9 PO |
1112 | }; |
1113 | ||
9feae246 AH |
1114 | static void mmc_sd_attach_bus_ops(struct mmc_host *host) |
1115 | { | |
1116 | const struct mmc_bus_ops *bus_ops; | |
1117 | ||
71d7d3d1 | 1118 | if (!mmc_card_is_removable(host)) |
9feae246 AH |
1119 | bus_ops = &mmc_sd_ops_unsafe; |
1120 | else | |
1121 | bus_ops = &mmc_sd_ops; | |
1122 | mmc_attach_bus(host, bus_ops); | |
1123 | } | |
1124 | ||
6abaa0c9 PO |
1125 | /* |
1126 | * Starting point for SD card init. | |
1127 | */ | |
807e8e40 | 1128 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
1129 | { |
1130 | int err; | |
807e8e40 | 1131 | u32 ocr; |
6abaa0c9 PO |
1132 | |
1133 | BUG_ON(!host); | |
d84075c8 | 1134 | WARN_ON(!host->claimed); |
6abaa0c9 | 1135 | |
f2119df6 | 1136 | /* Make sure we are at 3.3V signalling voltage */ |
261bbd46 | 1137 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false); |
f2119df6 AN |
1138 | if (err) |
1139 | return err; | |
1140 | ||
4d55c5a1 AN |
1141 | /* Disable preset value enable if already set since last time */ |
1142 | if (host->ops->enable_preset_value) | |
1143 | host->ops->enable_preset_value(host, false); | |
1144 | ||
807e8e40 AR |
1145 | err = mmc_send_app_op_cond(host, 0, &ocr); |
1146 | if (err) | |
1147 | return err; | |
1148 | ||
9feae246 | 1149 | mmc_sd_attach_bus_ops(host); |
8f230f45 TI |
1150 | if (host->ocr_avail_sd) |
1151 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 1152 | |
af517150 DB |
1153 | /* |
1154 | * We need to get OCR a different way for SPI. | |
1155 | */ | |
1156 | if (mmc_host_is_spi(host)) { | |
1157 | mmc_go_idle(host); | |
1158 | ||
1159 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
1160 | if (err) | |
1161 | goto err; | |
1162 | } | |
1163 | ||
6abaa0c9 PO |
1164 | /* |
1165 | * Sanity check the voltages that the card claims to | |
1166 | * support. | |
1167 | */ | |
1168 | if (ocr & 0x7F) { | |
1169 | printk(KERN_WARNING "%s: card claims to support voltages " | |
1170 | "below the defined range. These will be ignored.\n", | |
1171 | mmc_hostname(host)); | |
1172 | ocr &= ~0x7F; | |
1173 | } | |
1174 | ||
8f230f45 TI |
1175 | if ((ocr & MMC_VDD_165_195) && |
1176 | !(host->ocr_avail_sd & MMC_VDD_165_195)) { | |
6abaa0c9 PO |
1177 | printk(KERN_WARNING "%s: SD card claims to support the " |
1178 | "incompletely defined 'low voltage range'. This " | |
1179 | "will be ignored.\n", mmc_hostname(host)); | |
1180 | ocr &= ~MMC_VDD_165_195; | |
1181 | } | |
1182 | ||
1183 | host->ocr = mmc_select_voltage(host, ocr); | |
1184 | ||
1185 | /* | |
1186 | * Can we support the voltage(s) of the card(s)? | |
1187 | */ | |
109b5bed PO |
1188 | if (!host->ocr) { |
1189 | err = -EINVAL; | |
6abaa0c9 | 1190 | goto err; |
109b5bed | 1191 | } |
6abaa0c9 PO |
1192 | |
1193 | /* | |
1194 | * Detect and init the card. | |
1195 | */ | |
1196 | err = mmc_sd_init_card(host, host->ocr, NULL); | |
17b0429d | 1197 | if (err) |
6abaa0c9 PO |
1198 | goto err; |
1199 | ||
1200 | mmc_release_host(host); | |
4101c16a | 1201 | err = mmc_add_card(host->card); |
807e8e40 | 1202 | mmc_claim_host(host); |
7ea239d9 | 1203 | if (err) |
2986d0bf | 1204 | goto remove_card; |
7ea239d9 PO |
1205 | |
1206 | return 0; | |
1207 | ||
2986d0bf | 1208 | remove_card: |
807e8e40 | 1209 | mmc_release_host(host); |
6abaa0c9 | 1210 | mmc_remove_card(host->card); |
7ea239d9 | 1211 | host->card = NULL; |
2986d0bf | 1212 | mmc_claim_host(host); |
7ea239d9 PO |
1213 | err: |
1214 | mmc_detach_bus(host); | |
7ea239d9 | 1215 | |
109b5bed PO |
1216 | printk(KERN_ERR "%s: error %d whilst initialising SD card\n", |
1217 | mmc_hostname(host), err); | |
1218 | ||
adf66a0d | 1219 | return err; |
7ea239d9 PO |
1220 | } |
1221 |