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