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 | /* | |
133 | * This is a block-addressed SDHC card. Most | |
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); | |
147 | ||
148 | m = UNSTUFF_BITS(resp, 48, 22); | |
149 | csd->capacity = (1 + m) << 10; | |
150 | ||
151 | csd->read_blkbits = 9; | |
152 | csd->read_partial = 0; | |
153 | csd->write_misalign = 0; | |
154 | csd->read_misalign = 0; | |
155 | csd->r2w_factor = 4; /* Unused */ | |
156 | csd->write_blkbits = 9; | |
157 | csd->write_partial = 0; | |
dfe86cba | 158 | csd->erase_size = 1; |
7ea239d9 PO |
159 | break; |
160 | default: | |
facba917 | 161 | printk(KERN_ERR "%s: unrecognised CSD structure version %d\n", |
7ea239d9 | 162 | mmc_hostname(card->host), csd_struct); |
bd766312 | 163 | return -EINVAL; |
7ea239d9 | 164 | } |
bd766312 | 165 | |
dfe86cba AH |
166 | card->erase_size = csd->erase_size; |
167 | ||
bd766312 | 168 | return 0; |
7ea239d9 PO |
169 | } |
170 | ||
171 | /* | |
172 | * Given a 64-bit response, decode to our card SCR structure. | |
173 | */ | |
bd766312 | 174 | static int mmc_decode_scr(struct mmc_card *card) |
7ea239d9 PO |
175 | { |
176 | struct sd_scr *scr = &card->scr; | |
177 | unsigned int scr_struct; | |
178 | u32 resp[4]; | |
179 | ||
7ea239d9 PO |
180 | resp[3] = card->raw_scr[1]; |
181 | resp[2] = card->raw_scr[0]; | |
182 | ||
183 | scr_struct = UNSTUFF_BITS(resp, 60, 4); | |
184 | if (scr_struct != 0) { | |
facba917 | 185 | printk(KERN_ERR "%s: unrecognised SCR structure version %d\n", |
7ea239d9 | 186 | mmc_hostname(card->host), scr_struct); |
bd766312 | 187 | return -EINVAL; |
7ea239d9 PO |
188 | } |
189 | ||
190 | scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); | |
191 | scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); | |
013909c4 AN |
192 | if (scr->sda_vsn == SCR_SPEC_VER_2) |
193 | /* Check if Physical Layer Spec v3.0 is supported */ | |
194 | scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1); | |
bd766312 | 195 | |
dfe86cba AH |
196 | if (UNSTUFF_BITS(resp, 55, 1)) |
197 | card->erased_byte = 0xFF; | |
198 | else | |
199 | card->erased_byte = 0x0; | |
200 | ||
bd766312 | 201 | return 0; |
7ea239d9 PO |
202 | } |
203 | ||
dfe86cba AH |
204 | /* |
205 | * Fetch and process SD Status register. | |
206 | */ | |
207 | static int mmc_read_ssr(struct mmc_card *card) | |
208 | { | |
209 | unsigned int au, es, et, eo; | |
210 | int err, i; | |
211 | u32 *ssr; | |
212 | ||
213 | if (!(card->csd.cmdclass & CCC_APP_SPEC)) { | |
214 | printk(KERN_WARNING "%s: card lacks mandatory SD Status " | |
215 | "function.\n", mmc_hostname(card->host)); | |
216 | return 0; | |
217 | } | |
218 | ||
219 | ssr = kmalloc(64, GFP_KERNEL); | |
220 | if (!ssr) | |
221 | return -ENOMEM; | |
222 | ||
223 | err = mmc_app_sd_status(card, ssr); | |
224 | if (err) { | |
225 | printk(KERN_WARNING "%s: problem reading SD Status " | |
226 | "register.\n", mmc_hostname(card->host)); | |
227 | err = 0; | |
228 | goto out; | |
229 | } | |
230 | ||
231 | for (i = 0; i < 16; i++) | |
232 | ssr[i] = be32_to_cpu(ssr[i]); | |
233 | ||
234 | /* | |
235 | * UNSTUFF_BITS only works with four u32s so we have to offset the | |
236 | * bitfield positions accordingly. | |
237 | */ | |
238 | au = UNSTUFF_BITS(ssr, 428 - 384, 4); | |
239 | if (au > 0 || au <= 9) { | |
240 | card->ssr.au = 1 << (au + 4); | |
241 | es = UNSTUFF_BITS(ssr, 408 - 384, 16); | |
242 | et = UNSTUFF_BITS(ssr, 402 - 384, 6); | |
243 | eo = UNSTUFF_BITS(ssr, 400 - 384, 2); | |
244 | if (es && et) { | |
245 | card->ssr.erase_timeout = (et * 1000) / es; | |
246 | card->ssr.erase_offset = eo * 1000; | |
247 | } | |
248 | } else { | |
249 | printk(KERN_WARNING "%s: SD Status: Invalid Allocation Unit " | |
250 | "size.\n", mmc_hostname(card->host)); | |
251 | } | |
252 | out: | |
253 | kfree(ssr); | |
254 | return err; | |
255 | } | |
256 | ||
7ea239d9 | 257 | /* |
1addfcdb | 258 | * Fetches and decodes switch information |
7ea239d9 | 259 | */ |
1addfcdb | 260 | static int mmc_read_switch(struct mmc_card *card) |
7ea239d9 PO |
261 | { |
262 | int err; | |
263 | u8 *status; | |
264 | ||
3373c0ae | 265 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 266 | return 0; |
3373c0ae PO |
267 | |
268 | if (!(card->csd.cmdclass & CCC_SWITCH)) { | |
269 | printk(KERN_WARNING "%s: card lacks mandatory switch " | |
270 | "function, performance might suffer.\n", | |
271 | mmc_hostname(card->host)); | |
17b0429d | 272 | return 0; |
3373c0ae PO |
273 | } |
274 | ||
17b0429d | 275 | err = -EIO; |
7ea239d9 PO |
276 | |
277 | status = kmalloc(64, GFP_KERNEL); | |
278 | if (!status) { | |
facba917 | 279 | printk(KERN_ERR "%s: could not allocate a buffer for " |
013909c4 AN |
280 | "switch capabilities.\n", |
281 | mmc_hostname(card->host)); | |
17b0429d | 282 | return -ENOMEM; |
7ea239d9 PO |
283 | } |
284 | ||
013909c4 | 285 | /* Find out the supported Bus Speed Modes. */ |
7ea239d9 | 286 | err = mmc_sd_switch(card, 0, 0, 1, status); |
17b0429d | 287 | if (err) { |
013909c4 AN |
288 | /* |
289 | * If the host or the card can't do the switch, | |
290 | * fail more gracefully. | |
291 | */ | |
292 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
adf66a0d PO |
293 | goto out; |
294 | ||
013909c4 | 295 | printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n", |
3373c0ae | 296 | mmc_hostname(card->host)); |
17b0429d | 297 | err = 0; |
adf66a0d | 298 | |
7ea239d9 PO |
299 | goto out; |
300 | } | |
301 | ||
013909c4 AN |
302 | if (card->scr.sda_spec3) { |
303 | card->sw_caps.sd3_bus_mode = status[13]; | |
304 | ||
305 | /* Find out Driver Strengths supported by the card */ | |
306 | err = mmc_sd_switch(card, 0, 2, 1, status); | |
307 | if (err) { | |
308 | /* | |
309 | * If the host or the card can't do the switch, | |
310 | * fail more gracefully. | |
311 | */ | |
312 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
313 | goto out; | |
314 | ||
315 | printk(KERN_WARNING "%s: problem reading " | |
316 | "Driver Strength.\n", | |
317 | mmc_hostname(card->host)); | |
318 | err = 0; | |
319 | ||
320 | goto out; | |
321 | } | |
322 | ||
323 | card->sw_caps.sd3_drv_type = status[9]; | |
324 | ||
325 | /* Find out Current Limits supported by the card */ | |
326 | err = mmc_sd_switch(card, 0, 3, 1, status); | |
327 | if (err) { | |
328 | /* | |
329 | * If the host or the card can't do the switch, | |
330 | * fail more gracefully. | |
331 | */ | |
332 | if (err != -EINVAL && err != -ENOSYS && err != -EFAULT) | |
333 | goto out; | |
334 | ||
335 | printk(KERN_WARNING "%s: problem reading " | |
336 | "Current Limit.\n", | |
337 | mmc_hostname(card->host)); | |
338 | err = 0; | |
339 | ||
340 | goto out; | |
341 | } | |
342 | ||
343 | card->sw_caps.sd3_curr_limit = status[7]; | |
344 | } else { | |
345 | if (status[13] & 0x02) | |
346 | card->sw_caps.hs_max_dtr = 50000000; | |
347 | } | |
7ea239d9 | 348 | |
1addfcdb PO |
349 | out: |
350 | kfree(status); | |
351 | ||
352 | return err; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Test if the card supports high-speed mode and, if so, switch to it. | |
357 | */ | |
71578a1e | 358 | int mmc_sd_switch_hs(struct mmc_card *card) |
1addfcdb PO |
359 | { |
360 | int err; | |
361 | u8 *status; | |
362 | ||
3373c0ae | 363 | if (card->scr.sda_vsn < SCR_SPEC_VER_1) |
17b0429d | 364 | return 0; |
3373c0ae PO |
365 | |
366 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
17b0429d | 367 | return 0; |
3373c0ae | 368 | |
1addfcdb | 369 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) |
17b0429d | 370 | return 0; |
1addfcdb PO |
371 | |
372 | if (card->sw_caps.hs_max_dtr == 0) | |
17b0429d | 373 | return 0; |
1addfcdb | 374 | |
17b0429d | 375 | err = -EIO; |
1addfcdb PO |
376 | |
377 | status = kmalloc(64, GFP_KERNEL); | |
378 | if (!status) { | |
facba917 PO |
379 | printk(KERN_ERR "%s: could not allocate a buffer for " |
380 | "switch capabilities.\n", mmc_hostname(card->host)); | |
17b0429d | 381 | return -ENOMEM; |
1addfcdb PO |
382 | } |
383 | ||
7ea239d9 | 384 | err = mmc_sd_switch(card, 1, 0, 1, status); |
17b0429d | 385 | if (err) |
7ea239d9 PO |
386 | goto out; |
387 | ||
388 | if ((status[16] & 0xF) != 1) { | |
389 | printk(KERN_WARNING "%s: Problem switching card " | |
390 | "into high-speed mode!\n", | |
391 | mmc_hostname(card->host)); | |
71578a1e | 392 | err = 0; |
7ea239d9 | 393 | } else { |
71578a1e | 394 | err = 1; |
7ea239d9 PO |
395 | } |
396 | ||
397 | out: | |
398 | kfree(status); | |
399 | ||
400 | return err; | |
401 | } | |
402 | ||
d6d50a15 AN |
403 | static int sd_select_driver_type(struct mmc_card *card, u8 *status) |
404 | { | |
405 | int host_drv_type = 0, card_drv_type = 0; | |
406 | int err; | |
407 | ||
408 | /* | |
409 | * If the host doesn't support any of the Driver Types A,C or D, | |
410 | * default Driver Type B is used. | |
411 | */ | |
412 | if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C | |
413 | | MMC_CAP_DRIVER_TYPE_D))) | |
414 | return 0; | |
415 | ||
416 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) { | |
417 | host_drv_type = MMC_SET_DRIVER_TYPE_A; | |
418 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) | |
419 | card_drv_type = MMC_SET_DRIVER_TYPE_A; | |
420 | else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B) | |
421 | card_drv_type = MMC_SET_DRIVER_TYPE_B; | |
422 | else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
423 | card_drv_type = MMC_SET_DRIVER_TYPE_C; | |
424 | } else if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) { | |
425 | host_drv_type = MMC_SET_DRIVER_TYPE_C; | |
426 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
427 | card_drv_type = MMC_SET_DRIVER_TYPE_C; | |
428 | } else if (!(card->host->caps & MMC_CAP_DRIVER_TYPE_D)) { | |
429 | /* | |
430 | * If we are here, that means only the default driver type | |
431 | * B is supported by the host. | |
432 | */ | |
433 | host_drv_type = MMC_SET_DRIVER_TYPE_B; | |
434 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B) | |
435 | card_drv_type = MMC_SET_DRIVER_TYPE_B; | |
436 | else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
437 | card_drv_type = MMC_SET_DRIVER_TYPE_C; | |
438 | } | |
439 | ||
440 | err = mmc_sd_switch(card, 1, 2, card_drv_type, status); | |
441 | if (err) | |
442 | return err; | |
443 | ||
444 | if ((status[15] & 0xF) != card_drv_type) { | |
445 | printk(KERN_WARNING "%s: Problem setting driver strength!\n", | |
446 | mmc_hostname(card->host)); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | mmc_set_driver_type(card->host, host_drv_type); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | /* | |
456 | * UHS-I specific initialization procedure | |
457 | */ | |
458 | static int mmc_sd_init_uhs_card(struct mmc_card *card) | |
459 | { | |
460 | int err; | |
461 | u8 *status; | |
462 | ||
463 | if (!card->scr.sda_spec3) | |
464 | return 0; | |
465 | ||
466 | if (!(card->csd.cmdclass & CCC_SWITCH)) | |
467 | return 0; | |
468 | ||
469 | status = kmalloc(64, GFP_KERNEL); | |
470 | if (!status) { | |
471 | printk(KERN_ERR "%s: could not allocate a buffer for " | |
472 | "switch capabilities.\n", mmc_hostname(card->host)); | |
473 | return -ENOMEM; | |
474 | } | |
475 | ||
476 | /* Set 4-bit bus width */ | |
477 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
478 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
479 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
480 | if (err) | |
481 | goto out; | |
482 | ||
483 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
484 | } | |
485 | ||
486 | /* Set the driver strength for the card */ | |
487 | err = sd_select_driver_type(card, status); | |
488 | ||
489 | out: | |
490 | kfree(status); | |
491 | ||
492 | return err; | |
493 | } | |
494 | ||
51ec92e2 PO |
495 | MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
496 | card->raw_cid[2], card->raw_cid[3]); | |
497 | MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], | |
498 | card->raw_csd[2], card->raw_csd[3]); | |
499 | MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]); | |
500 | MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); | |
dfe86cba AH |
501 | MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); |
502 | MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); | |
51ec92e2 PO |
503 | MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); |
504 | MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); | |
505 | MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); | |
506 | MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); | |
507 | MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); | |
508 | MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); | |
509 | ||
510 | ||
511 | static struct attribute *sd_std_attrs[] = { | |
512 | &dev_attr_cid.attr, | |
513 | &dev_attr_csd.attr, | |
514 | &dev_attr_scr.attr, | |
515 | &dev_attr_date.attr, | |
dfe86cba AH |
516 | &dev_attr_erase_size.attr, |
517 | &dev_attr_preferred_erase_size.attr, | |
51ec92e2 PO |
518 | &dev_attr_fwrev.attr, |
519 | &dev_attr_hwrev.attr, | |
520 | &dev_attr_manfid.attr, | |
521 | &dev_attr_name.attr, | |
522 | &dev_attr_oemid.attr, | |
523 | &dev_attr_serial.attr, | |
524 | NULL, | |
525 | }; | |
526 | ||
527 | static struct attribute_group sd_std_attr_group = { | |
528 | .attrs = sd_std_attrs, | |
529 | }; | |
530 | ||
a4dbd674 | 531 | static const struct attribute_group *sd_attr_groups[] = { |
51ec92e2 PO |
532 | &sd_std_attr_group, |
533 | NULL, | |
534 | }; | |
535 | ||
71578a1e | 536 | struct device_type sd_type = { |
51ec92e2 PO |
537 | .groups = sd_attr_groups, |
538 | }; | |
539 | ||
7ea239d9 | 540 | /* |
71578a1e | 541 | * Fetch CID from card. |
7ea239d9 | 542 | */ |
d6d50a15 | 543 | int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) |
7ea239d9 | 544 | { |
7ea239d9 | 545 | int err; |
7ea239d9 | 546 | |
7ea239d9 PO |
547 | /* |
548 | * Since we're changing the OCR value, we seem to | |
549 | * need to tell some cards to go back to the idle | |
550 | * state. We wait 1ms to give cards time to | |
551 | * respond. | |
552 | */ | |
553 | mmc_go_idle(host); | |
554 | ||
555 | /* | |
556 | * If SD_SEND_IF_COND indicates an SD 2.0 | |
557 | * compliant card and we should set bit 30 | |
558 | * of the ocr to indicate that we can handle | |
559 | * block-addressed SDHC cards. | |
560 | */ | |
6abaa0c9 | 561 | err = mmc_send_if_cond(host, ocr); |
17b0429d | 562 | if (!err) |
f2119df6 | 563 | ocr |= SD_OCR_CCS; |
7ea239d9 | 564 | |
f2119df6 AN |
565 | /* |
566 | * If the host supports one of UHS-I modes, request the card | |
567 | * to switch to 1.8V signaling level. | |
568 | */ | |
569 | if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | | |
570 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)) | |
571 | ocr |= SD_OCR_S18R; | |
572 | ||
573 | /* If the host can supply more than 150mA, XPC should be set to 1. */ | |
574 | if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 | | |
575 | MMC_CAP_SET_XPC_180)) | |
576 | ocr |= SD_OCR_XPC; | |
577 | ||
578 | try_again: | |
d6d50a15 | 579 | err = mmc_send_app_op_cond(host, ocr, rocr); |
17b0429d | 580 | if (err) |
71578a1e | 581 | return err; |
7ea239d9 | 582 | |
f2119df6 AN |
583 | /* |
584 | * In case CCS and S18A in the response is set, start Signal Voltage | |
585 | * Switch procedure. SPI mode doesn't support CMD11. | |
586 | */ | |
d6d50a15 AN |
587 | if (!mmc_host_is_spi(host) && rocr && |
588 | ((*rocr & 0x41000000) == 0x41000000)) { | |
f2119df6 AN |
589 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
590 | if (err) { | |
591 | ocr &= ~SD_OCR_S18R; | |
592 | goto try_again; | |
593 | } | |
594 | } | |
595 | ||
af517150 DB |
596 | if (mmc_host_is_spi(host)) |
597 | err = mmc_send_cid(host, cid); | |
598 | else | |
599 | err = mmc_all_send_cid(host, cid); | |
71578a1e MM |
600 | |
601 | return err; | |
602 | } | |
603 | ||
604 | int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card) | |
605 | { | |
606 | int err; | |
607 | ||
608 | /* | |
609 | * Fetch CSD from card. | |
610 | */ | |
611 | err = mmc_send_csd(card, card->raw_csd); | |
17b0429d | 612 | if (err) |
71578a1e | 613 | return err; |
7ea239d9 | 614 | |
71578a1e MM |
615 | err = mmc_decode_csd(card); |
616 | if (err) | |
617 | return err; | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card, | |
623 | bool reinit) | |
624 | { | |
625 | int err; | |
626 | ||
627 | if (!reinit) { | |
628 | /* | |
629 | * Fetch SCR from card. | |
630 | */ | |
631 | err = mmc_app_send_scr(card, card->raw_scr); | |
632 | if (err) | |
633 | return err; | |
634 | ||
635 | err = mmc_decode_scr(card); | |
636 | if (err) | |
637 | return err; | |
638 | ||
dfe86cba AH |
639 | /* |
640 | * Fetch and process SD Status register. | |
641 | */ | |
642 | err = mmc_read_ssr(card); | |
643 | if (err) | |
644 | return err; | |
645 | ||
646 | /* Erase init depends on CSD and SSR */ | |
647 | mmc_init_erase(card); | |
648 | ||
71578a1e MM |
649 | /* |
650 | * Fetch switch information from card. | |
651 | */ | |
652 | err = mmc_read_switch(card); | |
653 | if (err) | |
654 | return err; | |
655 | } | |
656 | ||
657 | /* | |
658 | * For SPI, enable CRC as appropriate. | |
659 | * This CRC enable is located AFTER the reading of the | |
660 | * card registers because some SDHC cards are not able | |
661 | * to provide valid CRCs for non-512-byte blocks. | |
662 | */ | |
663 | if (mmc_host_is_spi(host)) { | |
664 | err = mmc_spi_set_crc(host, use_spi_crc); | |
665 | if (err) | |
666 | return err; | |
667 | } | |
668 | ||
669 | /* | |
670 | * Check if read-only switch is active. | |
671 | */ | |
672 | if (!reinit) { | |
673 | int ro = -1; | |
674 | ||
675 | if (host->ops->get_ro) | |
676 | ro = host->ops->get_ro(host); | |
677 | ||
678 | if (ro < 0) { | |
679 | printk(KERN_WARNING "%s: host does not " | |
680 | "support reading read-only " | |
681 | "switch. assuming write-enable.\n", | |
682 | mmc_hostname(host)); | |
683 | } else if (ro > 0) { | |
684 | mmc_card_set_readonly(card); | |
adf66a0d | 685 | } |
71578a1e MM |
686 | } |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | unsigned mmc_sd_get_max_clock(struct mmc_card *card) | |
692 | { | |
693 | unsigned max_dtr = (unsigned int)-1; | |
694 | ||
695 | if (mmc_card_highspeed(card)) { | |
696 | if (max_dtr > card->sw_caps.hs_max_dtr) | |
697 | max_dtr = card->sw_caps.hs_max_dtr; | |
698 | } else if (max_dtr > card->csd.max_dtr) { | |
699 | max_dtr = card->csd.max_dtr; | |
700 | } | |
701 | ||
702 | return max_dtr; | |
703 | } | |
704 | ||
705 | void mmc_sd_go_highspeed(struct mmc_card *card) | |
706 | { | |
707 | mmc_card_set_highspeed(card); | |
708 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); | |
709 | } | |
710 | ||
711 | /* | |
712 | * Handle the detection and initialisation of a card. | |
713 | * | |
714 | * In the case of a resume, "oldcard" will contain the card | |
715 | * we're trying to reinitialise. | |
716 | */ | |
717 | static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, | |
718 | struct mmc_card *oldcard) | |
719 | { | |
720 | struct mmc_card *card; | |
721 | int err; | |
722 | u32 cid[4]; | |
d6d50a15 | 723 | u32 rocr = 0; |
71578a1e MM |
724 | |
725 | BUG_ON(!host); | |
726 | WARN_ON(!host->claimed); | |
727 | ||
d6d50a15 | 728 | err = mmc_sd_get_cid(host, ocr, cid, &rocr); |
71578a1e MM |
729 | if (err) |
730 | return err; | |
731 | ||
732 | if (oldcard) { | |
733 | if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) | |
734 | return -ENOENT; | |
7ea239d9 | 735 | |
6abaa0c9 PO |
736 | card = oldcard; |
737 | } else { | |
738 | /* | |
739 | * Allocate card structure. | |
740 | */ | |
51ec92e2 | 741 | card = mmc_alloc_card(host, &sd_type); |
71578a1e MM |
742 | if (IS_ERR(card)) |
743 | return PTR_ERR(card); | |
6abaa0c9 PO |
744 | |
745 | card->type = MMC_TYPE_SD; | |
746 | memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); | |
747 | } | |
7ea239d9 PO |
748 | |
749 | /* | |
af517150 | 750 | * For native busses: get card RCA and quit open drain mode. |
7ea239d9 | 751 | */ |
af517150 DB |
752 | if (!mmc_host_is_spi(host)) { |
753 | err = mmc_send_relative_addr(host, &card->rca); | |
754 | if (err) | |
71578a1e | 755 | return err; |
7ea239d9 | 756 | |
af517150 DB |
757 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
758 | } | |
7ea239d9 | 759 | |
6abaa0c9 | 760 | if (!oldcard) { |
71578a1e | 761 | err = mmc_sd_get_csd(host, card); |
17b0429d | 762 | if (err) |
71578a1e | 763 | return err; |
bd766312 | 764 | |
6abaa0c9 PO |
765 | mmc_decode_cid(card); |
766 | } | |
7ea239d9 PO |
767 | |
768 | /* | |
6abaa0c9 | 769 | * Select card, as all following commands rely on that. |
7ea239d9 | 770 | */ |
af517150 DB |
771 | if (!mmc_host_is_spi(host)) { |
772 | err = mmc_select_card(card); | |
773 | if (err) | |
71578a1e | 774 | return err; |
6abaa0c9 | 775 | } |
1addfcdb | 776 | |
71578a1e MM |
777 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
778 | if (err) | |
779 | goto free_card; | |
9d9f25c0 | 780 | |
d6d50a15 AN |
781 | /* Initialization sequence for UHS-I cards */ |
782 | if (rocr & SD_ROCR_S18A) { | |
783 | err = mmc_sd_init_uhs_card(card); | |
17b0429d | 784 | if (err) |
7ea239d9 | 785 | goto free_card; |
d6d50a15 AN |
786 | } else { |
787 | /* | |
788 | * Attempt to change to high-speed (if supported) | |
789 | */ | |
790 | err = mmc_sd_switch_hs(card); | |
791 | if (err > 0) | |
792 | mmc_sd_go_highspeed(card); | |
793 | else if (err) | |
794 | goto free_card; | |
795 | ||
796 | /* | |
797 | * Set bus speed. | |
798 | */ | |
799 | mmc_set_clock(host, mmc_sd_get_max_clock(card)); | |
7ea239d9 | 800 | |
d6d50a15 AN |
801 | /* |
802 | * Switch to wider bus (if supported). | |
803 | */ | |
804 | if ((host->caps & MMC_CAP_4_BIT_DATA) && | |
805 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
806 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
807 | if (err) | |
808 | goto free_card; | |
809 | ||
810 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
811 | } | |
7ea239d9 PO |
812 | } |
813 | ||
71578a1e | 814 | host->card = card; |
17b0429d | 815 | return 0; |
6abaa0c9 PO |
816 | |
817 | free_card: | |
818 | if (!oldcard) | |
819 | mmc_remove_card(card); | |
6abaa0c9 | 820 | |
adf66a0d | 821 | return err; |
6abaa0c9 PO |
822 | } |
823 | ||
824 | /* | |
825 | * Host is being removed. Free up the current card. | |
826 | */ | |
827 | static void mmc_sd_remove(struct mmc_host *host) | |
828 | { | |
829 | BUG_ON(!host); | |
830 | BUG_ON(!host->card); | |
831 | ||
832 | mmc_remove_card(host->card); | |
833 | host->card = NULL; | |
834 | } | |
835 | ||
836 | /* | |
837 | * Card detection callback from host. | |
838 | */ | |
839 | static void mmc_sd_detect(struct mmc_host *host) | |
840 | { | |
841 | int err; | |
842 | ||
843 | BUG_ON(!host); | |
844 | BUG_ON(!host->card); | |
845 | ||
846 | mmc_claim_host(host); | |
847 | ||
848 | /* | |
849 | * Just check if our card has been removed. | |
850 | */ | |
851 | err = mmc_send_status(host->card, NULL); | |
7ea239d9 PO |
852 | |
853 | mmc_release_host(host); | |
854 | ||
17b0429d | 855 | if (err) { |
4101c16a | 856 | mmc_sd_remove(host); |
6abaa0c9 PO |
857 | |
858 | mmc_claim_host(host); | |
859 | mmc_detach_bus(host); | |
860 | mmc_release_host(host); | |
861 | } | |
862 | } | |
863 | ||
6abaa0c9 PO |
864 | /* |
865 | * Suspend callback from host. | |
866 | */ | |
95cdfb72 | 867 | static int mmc_sd_suspend(struct mmc_host *host) |
6abaa0c9 PO |
868 | { |
869 | BUG_ON(!host); | |
870 | BUG_ON(!host->card); | |
871 | ||
872 | mmc_claim_host(host); | |
af517150 DB |
873 | if (!mmc_host_is_spi(host)) |
874 | mmc_deselect_cards(host); | |
6abaa0c9 PO |
875 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
876 | mmc_release_host(host); | |
95cdfb72 NP |
877 | |
878 | return 0; | |
6abaa0c9 PO |
879 | } |
880 | ||
881 | /* | |
882 | * Resume callback from host. | |
883 | * | |
884 | * This function tries to determine if the same card is still present | |
885 | * and, if so, restore all state to it. | |
886 | */ | |
95cdfb72 | 887 | static int mmc_sd_resume(struct mmc_host *host) |
6abaa0c9 PO |
888 | { |
889 | int err; | |
890 | ||
891 | BUG_ON(!host); | |
892 | BUG_ON(!host->card); | |
893 | ||
894 | mmc_claim_host(host); | |
6abaa0c9 | 895 | err = mmc_sd_init_card(host, host->ocr, host->card); |
2986d0bf PO |
896 | mmc_release_host(host); |
897 | ||
95cdfb72 | 898 | return err; |
6abaa0c9 PO |
899 | } |
900 | ||
12ae637f | 901 | static int mmc_sd_power_restore(struct mmc_host *host) |
eae1aeee | 902 | { |
12ae637f OBC |
903 | int ret; |
904 | ||
eae1aeee AH |
905 | host->card->state &= ~MMC_STATE_HIGHSPEED; |
906 | mmc_claim_host(host); | |
12ae637f | 907 | ret = mmc_sd_init_card(host, host->ocr, host->card); |
eae1aeee | 908 | mmc_release_host(host); |
12ae637f OBC |
909 | |
910 | return ret; | |
eae1aeee AH |
911 | } |
912 | ||
6abaa0c9 | 913 | static const struct mmc_bus_ops mmc_sd_ops = { |
9feae246 AH |
914 | .remove = mmc_sd_remove, |
915 | .detect = mmc_sd_detect, | |
916 | .suspend = NULL, | |
917 | .resume = NULL, | |
eae1aeee | 918 | .power_restore = mmc_sd_power_restore, |
9feae246 AH |
919 | }; |
920 | ||
921 | static const struct mmc_bus_ops mmc_sd_ops_unsafe = { | |
6abaa0c9 PO |
922 | .remove = mmc_sd_remove, |
923 | .detect = mmc_sd_detect, | |
924 | .suspend = mmc_sd_suspend, | |
925 | .resume = mmc_sd_resume, | |
eae1aeee | 926 | .power_restore = mmc_sd_power_restore, |
6abaa0c9 PO |
927 | }; |
928 | ||
9feae246 AH |
929 | static void mmc_sd_attach_bus_ops(struct mmc_host *host) |
930 | { | |
931 | const struct mmc_bus_ops *bus_ops; | |
932 | ||
71d7d3d1 | 933 | if (!mmc_card_is_removable(host)) |
9feae246 AH |
934 | bus_ops = &mmc_sd_ops_unsafe; |
935 | else | |
936 | bus_ops = &mmc_sd_ops; | |
937 | mmc_attach_bus(host, bus_ops); | |
938 | } | |
939 | ||
6abaa0c9 PO |
940 | /* |
941 | * Starting point for SD card init. | |
942 | */ | |
807e8e40 | 943 | int mmc_attach_sd(struct mmc_host *host) |
6abaa0c9 PO |
944 | { |
945 | int err; | |
807e8e40 | 946 | u32 ocr; |
6abaa0c9 PO |
947 | |
948 | BUG_ON(!host); | |
d84075c8 | 949 | WARN_ON(!host->claimed); |
6abaa0c9 | 950 | |
f2119df6 AN |
951 | /* Make sure we are at 3.3V signalling voltage */ |
952 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); | |
953 | if (err) | |
954 | return err; | |
955 | ||
807e8e40 AR |
956 | err = mmc_send_app_op_cond(host, 0, &ocr); |
957 | if (err) | |
958 | return err; | |
959 | ||
9feae246 | 960 | mmc_sd_attach_bus_ops(host); |
8f230f45 TI |
961 | if (host->ocr_avail_sd) |
962 | host->ocr_avail = host->ocr_avail_sd; | |
6abaa0c9 | 963 | |
af517150 DB |
964 | /* |
965 | * We need to get OCR a different way for SPI. | |
966 | */ | |
967 | if (mmc_host_is_spi(host)) { | |
968 | mmc_go_idle(host); | |
969 | ||
970 | err = mmc_spi_read_ocr(host, 0, &ocr); | |
971 | if (err) | |
972 | goto err; | |
973 | } | |
974 | ||
6abaa0c9 PO |
975 | /* |
976 | * Sanity check the voltages that the card claims to | |
977 | * support. | |
978 | */ | |
979 | if (ocr & 0x7F) { | |
980 | printk(KERN_WARNING "%s: card claims to support voltages " | |
981 | "below the defined range. These will be ignored.\n", | |
982 | mmc_hostname(host)); | |
983 | ocr &= ~0x7F; | |
984 | } | |
985 | ||
8f230f45 TI |
986 | if ((ocr & MMC_VDD_165_195) && |
987 | !(host->ocr_avail_sd & MMC_VDD_165_195)) { | |
6abaa0c9 PO |
988 | printk(KERN_WARNING "%s: SD card claims to support the " |
989 | "incompletely defined 'low voltage range'. This " | |
990 | "will be ignored.\n", mmc_hostname(host)); | |
991 | ocr &= ~MMC_VDD_165_195; | |
992 | } | |
993 | ||
994 | host->ocr = mmc_select_voltage(host, ocr); | |
995 | ||
996 | /* | |
997 | * Can we support the voltage(s) of the card(s)? | |
998 | */ | |
109b5bed PO |
999 | if (!host->ocr) { |
1000 | err = -EINVAL; | |
6abaa0c9 | 1001 | goto err; |
109b5bed | 1002 | } |
6abaa0c9 PO |
1003 | |
1004 | /* | |
1005 | * Detect and init the card. | |
1006 | */ | |
1007 | err = mmc_sd_init_card(host, host->ocr, NULL); | |
17b0429d | 1008 | if (err) |
6abaa0c9 PO |
1009 | goto err; |
1010 | ||
1011 | mmc_release_host(host); | |
4101c16a | 1012 | err = mmc_add_card(host->card); |
807e8e40 | 1013 | mmc_claim_host(host); |
7ea239d9 | 1014 | if (err) |
2986d0bf | 1015 | goto remove_card; |
7ea239d9 PO |
1016 | |
1017 | return 0; | |
1018 | ||
2986d0bf | 1019 | remove_card: |
807e8e40 | 1020 | mmc_release_host(host); |
6abaa0c9 | 1021 | mmc_remove_card(host->card); |
7ea239d9 | 1022 | host->card = NULL; |
2986d0bf | 1023 | mmc_claim_host(host); |
7ea239d9 PO |
1024 | err: |
1025 | mmc_detach_bus(host); | |
7ea239d9 | 1026 | |
109b5bed PO |
1027 | printk(KERN_ERR "%s: error %d whilst initialising SD card\n", |
1028 | mmc_hostname(host), err); | |
1029 | ||
adf66a0d | 1030 | return err; |
7ea239d9 PO |
1031 | } |
1032 |