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Commit | Line | Data |
---|---|---|
5c4e6f13 PO |
1 | /* |
2 | * linux/drivers/mmc/sdio.c | |
3 | * | |
4 | * Copyright 2006-2007 Pierre Ossman | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or (at | |
9 | * your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/err.h> | |
81968561 | 13 | #include <linux/pm_runtime.h> |
5c4e6f13 PO |
14 | |
15 | #include <linux/mmc/host.h> | |
16 | #include <linux/mmc/card.h> | |
35c66c19 | 17 | #include <linux/mmc/sdio.h> |
e29a7d73 | 18 | #include <linux/mmc/sdio_func.h> |
5c4e6f13 PO |
19 | |
20 | #include "core.h" | |
21 | #include "bus.h" | |
71578a1e | 22 | #include "sd.h" |
e29a7d73 | 23 | #include "sdio_bus.h" |
5c4e6f13 PO |
24 | #include "mmc_ops.h" |
25 | #include "sd_ops.h" | |
26 | #include "sdio_ops.h" | |
b7261261 | 27 | #include "sdio_cis.h" |
5c4e6f13 | 28 | |
0597007f PO |
29 | static int sdio_read_fbr(struct sdio_func *func) |
30 | { | |
31 | int ret; | |
32 | unsigned char data; | |
33 | ||
34 | ret = mmc_io_rw_direct(func->card, 0, 0, | |
7616ee95 | 35 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data); |
0597007f PO |
36 | if (ret) |
37 | goto out; | |
38 | ||
39 | data &= 0x0f; | |
40 | ||
41 | if (data == 0x0f) { | |
42 | ret = mmc_io_rw_direct(func->card, 0, 0, | |
7616ee95 | 43 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data); |
0597007f PO |
44 | if (ret) |
45 | goto out; | |
46 | } | |
47 | ||
48 | func->class = data; | |
49 | ||
50 | out: | |
51 | return ret; | |
52 | } | |
53 | ||
e29a7d73 PO |
54 | static int sdio_init_func(struct mmc_card *card, unsigned int fn) |
55 | { | |
0597007f | 56 | int ret; |
e29a7d73 PO |
57 | struct sdio_func *func; |
58 | ||
59 | BUG_ON(fn > SDIO_MAX_FUNCS); | |
60 | ||
61 | func = sdio_alloc_func(card); | |
62 | if (IS_ERR(func)) | |
63 | return PTR_ERR(func); | |
64 | ||
65 | func->num = fn; | |
66 | ||
6f51be3d GI |
67 | if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) { |
68 | ret = sdio_read_fbr(func); | |
69 | if (ret) | |
70 | goto fail; | |
0597007f | 71 | |
6f51be3d GI |
72 | ret = sdio_read_func_cis(func); |
73 | if (ret) | |
74 | goto fail; | |
75 | } else { | |
76 | func->vendor = func->card->cis.vendor; | |
77 | func->device = func->card->cis.device; | |
78 | func->max_blksize = func->card->cis.blksize; | |
79 | } | |
b7261261 | 80 | |
e29a7d73 PO |
81 | card->sdio_func[fn - 1] = func; |
82 | ||
83 | return 0; | |
0597007f PO |
84 | |
85 | fail: | |
86 | /* | |
87 | * It is okay to remove the function here even though we hold | |
88 | * the host lock as we haven't registered the device yet. | |
89 | */ | |
90 | sdio_remove_func(func); | |
91 | return ret; | |
e29a7d73 PO |
92 | } |
93 | ||
35c66c19 PO |
94 | static int sdio_read_cccr(struct mmc_card *card) |
95 | { | |
96 | int ret; | |
97 | int cccr_vsn; | |
98 | unsigned char data; | |
99 | ||
100 | memset(&card->cccr, 0, sizeof(struct sdio_cccr)); | |
101 | ||
102 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); | |
103 | if (ret) | |
104 | goto out; | |
105 | ||
106 | cccr_vsn = data & 0x0f; | |
107 | ||
108 | if (cccr_vsn > SDIO_CCCR_REV_1_20) { | |
109 | printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n", | |
110 | mmc_hostname(card->host), cccr_vsn); | |
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | card->cccr.sdio_vsn = (data & 0xf0) >> 4; | |
115 | ||
116 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); | |
117 | if (ret) | |
118 | goto out; | |
119 | ||
120 | if (data & SDIO_CCCR_CAP_SMB) | |
121 | card->cccr.multi_block = 1; | |
122 | if (data & SDIO_CCCR_CAP_LSC) | |
123 | card->cccr.low_speed = 1; | |
124 | if (data & SDIO_CCCR_CAP_4BLS) | |
125 | card->cccr.wide_bus = 1; | |
126 | ||
127 | if (cccr_vsn >= SDIO_CCCR_REV_1_10) { | |
128 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); | |
129 | if (ret) | |
130 | goto out; | |
131 | ||
132 | if (data & SDIO_POWER_SMPC) | |
133 | card->cccr.high_power = 1; | |
134 | } | |
135 | ||
136 | if (cccr_vsn >= SDIO_CCCR_REV_1_20) { | |
137 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data); | |
138 | if (ret) | |
139 | goto out; | |
140 | ||
141 | if (data & SDIO_SPEED_SHS) | |
142 | card->cccr.high_speed = 1; | |
143 | } | |
144 | ||
145 | out: | |
146 | return ret; | |
147 | } | |
148 | ||
4ff6471c PO |
149 | static int sdio_enable_wide(struct mmc_card *card) |
150 | { | |
151 | int ret; | |
152 | u8 ctrl; | |
153 | ||
154 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
155 | return 0; | |
156 | ||
157 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
158 | return 0; | |
159 | ||
160 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
161 | if (ret) | |
162 | return ret; | |
163 | ||
164 | ctrl |= SDIO_BUS_WIDTH_4BIT; | |
165 | ||
166 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
167 | if (ret) | |
168 | return ret; | |
169 | ||
7310ece8 | 170 | return 1; |
4ff6471c PO |
171 | } |
172 | ||
006ebd5d OBC |
173 | /* |
174 | * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1) | |
175 | * of the card. This may be required on certain setups of boards, | |
176 | * controllers and embedded sdio device which do not need the card's | |
177 | * pull-up. As a result, card detection is disabled and power is saved. | |
178 | */ | |
179 | static int sdio_disable_cd(struct mmc_card *card) | |
180 | { | |
181 | int ret; | |
182 | u8 ctrl; | |
183 | ||
184 | if (!card->cccr.disable_cd) | |
185 | return 0; | |
186 | ||
187 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
188 | if (ret) | |
189 | return ret; | |
190 | ||
191 | ctrl |= SDIO_BUS_CD_DISABLE; | |
192 | ||
193 | return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
194 | } | |
195 | ||
6b5eda36 DD |
196 | /* |
197 | * Devices that remain active during a system suspend are | |
198 | * put back into 1-bit mode. | |
199 | */ | |
200 | static int sdio_disable_wide(struct mmc_card *card) | |
201 | { | |
202 | int ret; | |
203 | u8 ctrl; | |
204 | ||
205 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
206 | return 0; | |
207 | ||
208 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
209 | return 0; | |
210 | ||
211 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
212 | if (ret) | |
213 | return ret; | |
214 | ||
215 | if (!(ctrl & SDIO_BUS_WIDTH_4BIT)) | |
216 | return 0; | |
217 | ||
218 | ctrl &= ~SDIO_BUS_WIDTH_4BIT; | |
219 | ctrl |= SDIO_BUS_ASYNC_INT; | |
220 | ||
221 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
222 | if (ret) | |
223 | return ret; | |
224 | ||
225 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1); | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
7310ece8 MM |
230 | |
231 | static int sdio_enable_4bit_bus(struct mmc_card *card) | |
232 | { | |
233 | int err; | |
234 | ||
235 | if (card->type == MMC_TYPE_SDIO) | |
236 | return sdio_enable_wide(card); | |
237 | ||
238 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
239 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
240 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
241 | if (err) | |
242 | return err; | |
243 | } else | |
244 | return 0; | |
245 | ||
246 | err = sdio_enable_wide(card); | |
247 | if (err <= 0) | |
248 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); | |
249 | ||
250 | return err; | |
251 | } | |
252 | ||
253 | ||
d16f5770 PO |
254 | /* |
255 | * Test if the card supports high-speed mode and, if so, switch to it. | |
256 | */ | |
7310ece8 | 257 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
d16f5770 PO |
258 | { |
259 | int ret; | |
260 | u8 speed; | |
261 | ||
262 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) | |
263 | return 0; | |
264 | ||
265 | if (!card->cccr.high_speed) | |
266 | return 0; | |
267 | ||
268 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
269 | if (ret) | |
270 | return ret; | |
271 | ||
7310ece8 MM |
272 | if (enable) |
273 | speed |= SDIO_SPEED_EHS; | |
274 | else | |
275 | speed &= ~SDIO_SPEED_EHS; | |
d16f5770 PO |
276 | |
277 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
278 | if (ret) | |
279 | return ret; | |
280 | ||
71578a1e MM |
281 | return 1; |
282 | } | |
d16f5770 | 283 | |
7310ece8 MM |
284 | /* |
285 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. | |
286 | */ | |
287 | static int sdio_enable_hs(struct mmc_card *card) | |
288 | { | |
289 | int ret; | |
290 | ||
291 | ret = mmc_sdio_switch_hs(card, true); | |
292 | if (ret <= 0 || card->type == MMC_TYPE_SDIO) | |
293 | return ret; | |
294 | ||
295 | ret = mmc_sd_switch_hs(card); | |
296 | if (ret <= 0) | |
297 | mmc_sdio_switch_hs(card, false); | |
298 | ||
299 | return ret; | |
300 | } | |
301 | ||
71578a1e MM |
302 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
303 | { | |
304 | unsigned max_dtr; | |
305 | ||
306 | if (mmc_card_highspeed(card)) { | |
307 | /* | |
308 | * The SDIO specification doesn't mention how | |
309 | * the CIS transfer speed register relates to | |
310 | * high-speed, but it seems that 50 MHz is | |
311 | * mandatory. | |
312 | */ | |
313 | max_dtr = 50000000; | |
314 | } else { | |
315 | max_dtr = card->cis.max_dtr; | |
316 | } | |
317 | ||
7310ece8 MM |
318 | if (card->type == MMC_TYPE_SD_COMBO) |
319 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); | |
320 | ||
71578a1e | 321 | return max_dtr; |
d16f5770 PO |
322 | } |
323 | ||
17d33e14 NP |
324 | /* |
325 | * Handle the detection and initialisation of a card. | |
326 | * | |
327 | * In the case of a resume, "oldcard" will contain the card | |
328 | * we're trying to reinitialise. | |
329 | */ | |
330 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 331 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
332 | { |
333 | struct mmc_card *card; | |
334 | int err; | |
335 | ||
336 | BUG_ON(!host); | |
337 | WARN_ON(!host->claimed); | |
338 | ||
339 | /* | |
340 | * Inform the card of the voltage | |
341 | */ | |
3bca4cf7 CB |
342 | if (!powered_resume) { |
343 | err = mmc_send_io_op_cond(host, host->ocr, &ocr); | |
344 | if (err) | |
345 | goto err; | |
346 | } | |
17d33e14 NP |
347 | |
348 | /* | |
349 | * For SPI, enable CRC as appropriate. | |
350 | */ | |
351 | if (mmc_host_is_spi(host)) { | |
352 | err = mmc_spi_set_crc(host, use_spi_crc); | |
353 | if (err) | |
354 | goto err; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Allocate card structure. | |
359 | */ | |
360 | card = mmc_alloc_card(host, NULL); | |
361 | if (IS_ERR(card)) { | |
362 | err = PTR_ERR(card); | |
363 | goto err; | |
364 | } | |
365 | ||
f3c65b28 DV |
366 | if (ocr & R4_MEMORY_PRESENT |
367 | && mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid) == 0) { | |
7310ece8 MM |
368 | card->type = MMC_TYPE_SD_COMBO; |
369 | ||
370 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
371 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
372 | mmc_remove_card(card); | |
373 | return -ENOENT; | |
374 | } | |
375 | } else { | |
376 | card->type = MMC_TYPE_SDIO; | |
377 | ||
378 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
379 | mmc_remove_card(card); | |
380 | return -ENOENT; | |
381 | } | |
382 | } | |
17d33e14 | 383 | |
3fcb027d DM |
384 | /* |
385 | * Call the optional HC's init_card function to handle quirks. | |
386 | */ | |
387 | if (host->ops->init_card) | |
388 | host->ops->init_card(host, card); | |
389 | ||
17d33e14 NP |
390 | /* |
391 | * For native busses: set card RCA and quit open drain mode. | |
392 | */ | |
3bca4cf7 | 393 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
394 | err = mmc_send_relative_addr(host, &card->rca); |
395 | if (err) | |
396 | goto remove; | |
397 | ||
0aab3995 SNX |
398 | /* |
399 | * Update oldcard with the new RCA received from the SDIO | |
400 | * device -- we're doing this so that it's updated in the | |
401 | * "card" struct when oldcard overwrites that later. | |
402 | */ | |
403 | if (oldcard) | |
404 | oldcard->rca = card->rca; | |
405 | ||
17d33e14 NP |
406 | mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
407 | } | |
408 | ||
7310ece8 MM |
409 | /* |
410 | * Read CSD, before selecting the card | |
411 | */ | |
412 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
413 | err = mmc_sd_get_csd(host, card); | |
414 | if (err) | |
415 | return err; | |
416 | ||
417 | mmc_decode_cid(card); | |
418 | } | |
419 | ||
17d33e14 NP |
420 | /* |
421 | * Select card, as all following commands rely on that. | |
422 | */ | |
3bca4cf7 | 423 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
424 | err = mmc_select_card(card); |
425 | if (err) | |
426 | goto remove; | |
427 | } | |
428 | ||
6f51be3d GI |
429 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
430 | /* | |
431 | * This is non-standard SDIO device, meaning it doesn't | |
432 | * have any CIA (Common I/O area) registers present. | |
433 | * It's host's responsibility to fill cccr and cis | |
434 | * structures in init_card(). | |
435 | */ | |
436 | mmc_set_clock(host, card->cis.max_dtr); | |
437 | ||
438 | if (card->cccr.high_speed) { | |
439 | mmc_card_set_highspeed(card); | |
440 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); | |
441 | } | |
442 | ||
443 | goto finish; | |
444 | } | |
445 | ||
17d33e14 NP |
446 | /* |
447 | * Read the common registers. | |
448 | */ | |
449 | err = sdio_read_cccr(card); | |
450 | if (err) | |
451 | goto remove; | |
452 | ||
453 | /* | |
454 | * Read the common CIS tuples. | |
455 | */ | |
456 | err = sdio_read_common_cis(card); | |
457 | if (err) | |
458 | goto remove; | |
459 | ||
460 | if (oldcard) { | |
461 | int same = (card->cis.vendor == oldcard->cis.vendor && | |
462 | card->cis.device == oldcard->cis.device); | |
463 | mmc_remove_card(card); | |
7310ece8 MM |
464 | if (!same) |
465 | return -ENOENT; | |
466 | ||
17d33e14 NP |
467 | card = oldcard; |
468 | } | |
57f0adc7 | 469 | mmc_fixup_device(card); |
17d33e14 | 470 | |
7310ece8 MM |
471 | if (card->type == MMC_TYPE_SD_COMBO) { |
472 | err = mmc_sd_setup_card(host, card, oldcard != NULL); | |
473 | /* handle as SDIO-only card if memory init failed */ | |
474 | if (err) { | |
475 | mmc_go_idle(host); | |
476 | if (mmc_host_is_spi(host)) | |
477 | /* should not fail, as it worked previously */ | |
478 | mmc_spi_set_crc(host, use_spi_crc); | |
479 | card->type = MMC_TYPE_SDIO; | |
480 | } else | |
481 | card->dev.type = &sd_type; | |
482 | } | |
483 | ||
484 | /* | |
485 | * If needed, disconnect card detection pull-up resistor. | |
486 | */ | |
487 | err = sdio_disable_cd(card); | |
488 | if (err) | |
489 | goto remove; | |
490 | ||
17d33e14 NP |
491 | /* |
492 | * Switch to high-speed (if supported). | |
493 | */ | |
494 | err = sdio_enable_hs(card); | |
71578a1e MM |
495 | if (err > 0) |
496 | mmc_sd_go_highspeed(card); | |
497 | else if (err) | |
17d33e14 NP |
498 | goto remove; |
499 | ||
500 | /* | |
501 | * Change to the card's maximum speed. | |
502 | */ | |
71578a1e | 503 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); |
17d33e14 NP |
504 | |
505 | /* | |
506 | * Switch to wider bus (if supported). | |
507 | */ | |
7310ece8 MM |
508 | err = sdio_enable_4bit_bus(card); |
509 | if (err > 0) | |
510 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
511 | else if (err) | |
17d33e14 NP |
512 | goto remove; |
513 | ||
6f51be3d | 514 | finish: |
17d33e14 NP |
515 | if (!oldcard) |
516 | host->card = card; | |
517 | return 0; | |
518 | ||
519 | remove: | |
520 | if (!oldcard) | |
521 | mmc_remove_card(card); | |
522 | ||
523 | err: | |
524 | return err; | |
525 | } | |
526 | ||
5c4e6f13 PO |
527 | /* |
528 | * Host is being removed. Free up the current card. | |
529 | */ | |
530 | static void mmc_sdio_remove(struct mmc_host *host) | |
531 | { | |
e29a7d73 PO |
532 | int i; |
533 | ||
5c4e6f13 PO |
534 | BUG_ON(!host); |
535 | BUG_ON(!host->card); | |
536 | ||
e29a7d73 PO |
537 | for (i = 0;i < host->card->sdio_funcs;i++) { |
538 | if (host->card->sdio_func[i]) { | |
539 | sdio_remove_func(host->card->sdio_func[i]); | |
540 | host->card->sdio_func[i] = NULL; | |
541 | } | |
542 | } | |
543 | ||
5c4e6f13 PO |
544 | mmc_remove_card(host->card); |
545 | host->card = NULL; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Card detection callback from host. | |
550 | */ | |
551 | static void mmc_sdio_detect(struct mmc_host *host) | |
552 | { | |
553 | int err; | |
554 | ||
555 | BUG_ON(!host); | |
556 | BUG_ON(!host->card); | |
557 | ||
87973ba2 | 558 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
559 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
560 | err = pm_runtime_get_sync(&host->card->dev); | |
561 | if (err < 0) | |
562 | goto out; | |
563 | } | |
87973ba2 | 564 | |
5c4e6f13 PO |
565 | mmc_claim_host(host); |
566 | ||
567 | /* | |
568 | * Just check if our card has been removed. | |
569 | */ | |
570 | err = mmc_select_card(host->card); | |
571 | ||
572 | mmc_release_host(host); | |
573 | ||
4d0812c3 OBC |
574 | /* |
575 | * Tell PM core it's OK to power off the card now. | |
576 | * | |
577 | * The _sync variant is used in order to ensure that the card | |
578 | * is left powered off in case an error occurred, and the card | |
579 | * is going to be removed. | |
580 | * | |
581 | * Since there is no specific reason to believe a new user | |
582 | * is about to show up at this point, the _sync variant is | |
583 | * desirable anyway. | |
584 | */ | |
ed919b01 OBC |
585 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
586 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 587 | |
87973ba2 | 588 | out: |
5c4e6f13 PO |
589 | if (err) { |
590 | mmc_sdio_remove(host); | |
591 | ||
592 | mmc_claim_host(host); | |
593 | mmc_detach_bus(host); | |
594 | mmc_release_host(host); | |
595 | } | |
596 | } | |
597 | ||
17d33e14 NP |
598 | /* |
599 | * SDIO suspend. We need to suspend all functions separately. | |
600 | * Therefore all registered functions must have drivers with suspend | |
601 | * and resume methods. Failing that we simply remove the whole card. | |
602 | */ | |
95cdfb72 | 603 | static int mmc_sdio_suspend(struct mmc_host *host) |
17d33e14 | 604 | { |
95cdfb72 | 605 | int i, err = 0; |
17d33e14 | 606 | |
17d33e14 NP |
607 | for (i = 0; i < host->card->sdio_funcs; i++) { |
608 | struct sdio_func *func = host->card->sdio_func[i]; | |
609 | if (func && sdio_func_present(func) && func->dev.driver) { | |
610 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
611 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
612 | /* force removal of entire card in that case */ |
613 | err = -ENOSYS; | |
614 | } else | |
615 | err = pmops->suspend(&func->dev); | |
616 | if (err) | |
617 | break; | |
17d33e14 NP |
618 | } |
619 | } | |
95cdfb72 | 620 | while (err && --i >= 0) { |
17d33e14 NP |
621 | struct sdio_func *func = host->card->sdio_func[i]; |
622 | if (func && sdio_func_present(func) && func->dev.driver) { | |
623 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
95cdfb72 | 624 | pmops->resume(&func->dev); |
17d33e14 NP |
625 | } |
626 | } | |
95cdfb72 | 627 | |
a5e9425d | 628 | if (!err && mmc_card_keep_power(host)) { |
6b5eda36 DD |
629 | mmc_claim_host(host); |
630 | sdio_disable_wide(host->card); | |
631 | mmc_release_host(host); | |
632 | } | |
633 | ||
95cdfb72 | 634 | return err; |
17d33e14 NP |
635 | } |
636 | ||
95cdfb72 | 637 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 638 | { |
080bc977 | 639 | int i, err = 0; |
17d33e14 NP |
640 | |
641 | BUG_ON(!host); | |
642 | BUG_ON(!host->card); | |
643 | ||
95cdfb72 | 644 | /* Basic card reinitialization. */ |
17d33e14 | 645 | mmc_claim_host(host); |
080bc977 OBC |
646 | |
647 | /* No need to reinitialize powered-resumed nonremovable cards */ | |
a5e9425d | 648 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) |
080bc977 | 649 | err = mmc_sdio_init_card(host, host->ocr, host->card, |
a5e9425d OBC |
650 | mmc_card_keep_power(host)); |
651 | else if (mmc_card_keep_power(host)) { | |
080bc977 OBC |
652 | /* We may have switched to 1-bit mode during suspend */ |
653 | err = sdio_enable_4bit_bus(host->card); | |
654 | if (err > 0) { | |
655 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
656 | err = 0; | |
657 | } | |
658 | } | |
659 | ||
40216842 NP |
660 | if (!err && host->sdio_irqs) |
661 | mmc_signal_sdio_irq(host); | |
17d33e14 | 662 | mmc_release_host(host); |
17d33e14 | 663 | |
95cdfb72 NP |
664 | /* |
665 | * If the card looked to be the same as before suspending, then | |
666 | * we proceed to resume all card functions. If one of them returns | |
667 | * an error then we simply return that error to the core and the | |
668 | * card will be redetected as new. It is the responsibility of | |
669 | * the function driver to perform further tests with the extra | |
670 | * knowledge it has of the card to confirm the card is indeed the | |
671 | * same as before suspending (same MAC address for network cards, | |
672 | * etc.) and return an error otherwise. | |
673 | */ | |
674 | for (i = 0; !err && i < host->card->sdio_funcs; i++) { | |
17d33e14 NP |
675 | struct sdio_func *func = host->card->sdio_func[i]; |
676 | if (func && sdio_func_present(func) && func->dev.driver) { | |
677 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
95cdfb72 | 678 | err = pmops->resume(&func->dev); |
17d33e14 NP |
679 | } |
680 | } | |
95cdfb72 NP |
681 | |
682 | return err; | |
17d33e14 | 683 | } |
5c4e6f13 | 684 | |
d3fe37b1 OBC |
685 | static int mmc_sdio_power_restore(struct mmc_host *host) |
686 | { | |
687 | int ret; | |
688 | ||
689 | BUG_ON(!host); | |
690 | BUG_ON(!host->card); | |
691 | ||
692 | mmc_claim_host(host); | |
693 | ret = mmc_sdio_init_card(host, host->ocr, host->card, | |
a5e9425d | 694 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
695 | if (!ret && host->sdio_irqs) |
696 | mmc_signal_sdio_irq(host); | |
697 | mmc_release_host(host); | |
698 | ||
699 | return ret; | |
700 | } | |
701 | ||
5c4e6f13 PO |
702 | static const struct mmc_bus_ops mmc_sdio_ops = { |
703 | .remove = mmc_sdio_remove, | |
704 | .detect = mmc_sdio_detect, | |
17d33e14 NP |
705 | .suspend = mmc_sdio_suspend, |
706 | .resume = mmc_sdio_resume, | |
d3fe37b1 | 707 | .power_restore = mmc_sdio_power_restore, |
5c4e6f13 PO |
708 | }; |
709 | ||
710 | ||
711 | /* | |
712 | * Starting point for SDIO card init. | |
713 | */ | |
807e8e40 | 714 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 715 | { |
807e8e40 AR |
716 | int err, i, funcs; |
717 | u32 ocr; | |
5c4e6f13 PO |
718 | struct mmc_card *card; |
719 | ||
720 | BUG_ON(!host); | |
d84075c8 | 721 | WARN_ON(!host->claimed); |
5c4e6f13 | 722 | |
807e8e40 AR |
723 | err = mmc_send_io_op_cond(host, 0, &ocr); |
724 | if (err) | |
725 | return err; | |
726 | ||
5c4e6f13 | 727 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
728 | if (host->ocr_avail_sdio) |
729 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 PO |
730 | |
731 | /* | |
732 | * Sanity check the voltages that the card claims to | |
733 | * support. | |
734 | */ | |
735 | if (ocr & 0x7F) { | |
736 | printk(KERN_WARNING "%s: card claims to support voltages " | |
737 | "below the defined range. These will be ignored.\n", | |
738 | mmc_hostname(host)); | |
739 | ocr &= ~0x7F; | |
740 | } | |
741 | ||
5c4e6f13 PO |
742 | host->ocr = mmc_select_voltage(host, ocr); |
743 | ||
744 | /* | |
745 | * Can we support the voltage(s) of the card(s)? | |
746 | */ | |
747 | if (!host->ocr) { | |
748 | err = -EINVAL; | |
749 | goto err; | |
750 | } | |
751 | ||
752 | /* | |
17d33e14 | 753 | * Detect and init the card. |
5c4e6f13 | 754 | */ |
3bca4cf7 | 755 | err = mmc_sdio_init_card(host, host->ocr, NULL, 0); |
5c4e6f13 PO |
756 | if (err) |
757 | goto err; | |
17d33e14 | 758 | card = host->card; |
af517150 | 759 | |
81968561 | 760 | /* |
ed919b01 | 761 | * Enable runtime PM only if supported by host+card+board |
81968561 | 762 | */ |
ed919b01 OBC |
763 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
764 | /* | |
765 | * Let runtime PM core know our card is active | |
766 | */ | |
767 | err = pm_runtime_set_active(&card->dev); | |
768 | if (err) | |
769 | goto remove; | |
81968561 | 770 | |
ed919b01 OBC |
771 | /* |
772 | * Enable runtime PM for this card | |
773 | */ | |
774 | pm_runtime_enable(&card->dev); | |
775 | } | |
81968561 | 776 | |
5c4e6f13 PO |
777 | /* |
778 | * The number of functions on the card is encoded inside | |
779 | * the ocr. | |
780 | */ | |
e8812793 MF |
781 | funcs = (ocr & 0x70000000) >> 28; |
782 | card->sdio_funcs = 0; | |
4ff6471c | 783 | |
e29a7d73 PO |
784 | /* |
785 | * Initialize (but don't add) all present functions. | |
786 | */ | |
e8812793 | 787 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
788 | err = sdio_init_func(host->card, i + 1); |
789 | if (err) | |
790 | goto remove; | |
40bba0c1 OBC |
791 | |
792 | /* | |
ed919b01 | 793 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 794 | */ |
ed919b01 OBC |
795 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
796 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 797 | } |
5c4e6f13 | 798 | |
e29a7d73 PO |
799 | /* |
800 | * First add the card to the driver model... | |
801 | */ | |
807e8e40 | 802 | mmc_release_host(host); |
5c4e6f13 PO |
803 | err = mmc_add_card(host->card); |
804 | if (err) | |
e29a7d73 PO |
805 | goto remove_added; |
806 | ||
807 | /* | |
808 | * ...then the SDIO functions. | |
809 | */ | |
810 | for (i = 0;i < funcs;i++) { | |
811 | err = sdio_add_func(host->card->sdio_func[i]); | |
812 | if (err) | |
813 | goto remove_added; | |
814 | } | |
5c4e6f13 | 815 | |
34497913 | 816 | mmc_claim_host(host); |
5c4e6f13 PO |
817 | return 0; |
818 | ||
e29a7d73 PO |
819 | |
820 | remove_added: | |
821 | /* Remove without lock if the device has been added. */ | |
822 | mmc_sdio_remove(host); | |
5c4e6f13 | 823 | mmc_claim_host(host); |
e29a7d73 PO |
824 | remove: |
825 | /* And with lock if it hasn't been added. */ | |
807e8e40 | 826 | mmc_release_host(host); |
e29a7d73 PO |
827 | if (host->card) |
828 | mmc_sdio_remove(host); | |
807e8e40 | 829 | mmc_claim_host(host); |
5c4e6f13 PO |
830 | err: |
831 | mmc_detach_bus(host); | |
5c4e6f13 PO |
832 | |
833 | printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n", | |
834 | mmc_hostname(host), err); | |
835 | ||
836 | return err; | |
837 | } | |
838 |