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x86/boot: Rename overlapping memcpy() to memmove()
[linux/fpc-iii.git] / drivers / mmc / core / sdio.c
blobbd44ba8116d1584767e15ace328c72efb133f272
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>
13 #include <linux/pm_runtime.h>
14
15 #include <linux/mmc/host.h>
16 #include <linux/mmc/card.h>
17 #include <linux/mmc/mmc.h>
18 #include <linux/mmc/sdio.h>
19 #include <linux/mmc/sdio_func.h>
20 #include <linux/mmc/sdio_ids.h>
21
22 #include "core.h"
23 #include "bus.h"
24 #include "sd.h"
25 #include "sdio_bus.h"
26 #include "mmc_ops.h"
27 #include "sd_ops.h"
28 #include "sdio_ops.h"
29 #include "sdio_cis.h"
30
31 static int sdio_read_fbr(struct sdio_func *func)
32 {
33 int ret;
34 unsigned char data;
35
36 if (mmc_card_nonstd_func_interface(func->card)) {
37 func->class = SDIO_CLASS_NONE;
38 return 0;
39 }
40
41 ret = mmc_io_rw_direct(func->card, 0, 0,
42 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
43 if (ret)
44 goto out;
45
46 data &= 0x0f;
47
48 if (data == 0x0f) {
49 ret = mmc_io_rw_direct(func->card, 0, 0,
50 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
51 if (ret)
52 goto out;
53 }
54
55 func->class = data;
56
57 out:
58 return ret;
59 }
60
61 static int sdio_init_func(struct mmc_card *card, unsigned int fn)
62 {
63 int ret;
64 struct sdio_func *func;
65
66 BUG_ON(fn > SDIO_MAX_FUNCS);
67
68 func = sdio_alloc_func(card);
69 if (IS_ERR(func))
70 return PTR_ERR(func);
71
72 func->num = fn;
73
74 if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
75 ret = sdio_read_fbr(func);
76 if (ret)
77 goto fail;
78
79 ret = sdio_read_func_cis(func);
80 if (ret)
81 goto fail;
82 } else {
83 func->vendor = func->card->cis.vendor;
84 func->device = func->card->cis.device;
85 func->max_blksize = func->card->cis.blksize;
86 }
87
88 card->sdio_func[fn - 1] = func;
89
90 return 0;
91
92 fail:
93 /*
94 * It is okay to remove the function here even though we hold
95 * the host lock as we haven't registered the device yet.
96 */
97 sdio_remove_func(func);
98 return ret;
99 }
100
101 static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
102 {
103 int ret;
104 int cccr_vsn;
105 int uhs = ocr & R4_18V_PRESENT;
106 unsigned char data;
107 unsigned char speed;
108
109 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
110 if (ret)
111 goto out;
112
113 cccr_vsn = data & 0x0f;
114
115 if (cccr_vsn > SDIO_CCCR_REV_3_00) {
116 pr_err("%s: unrecognised CCCR structure version %d\n",
117 mmc_hostname(card->host), cccr_vsn);
118 return -EINVAL;
119 }
120
121 card->cccr.sdio_vsn = (data & 0xf0) >> 4;
122
123 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
124 if (ret)
125 goto out;
126
127 if (data & SDIO_CCCR_CAP_SMB)
128 card->cccr.multi_block = 1;
129 if (data & SDIO_CCCR_CAP_LSC)
130 card->cccr.low_speed = 1;
131 if (data & SDIO_CCCR_CAP_4BLS)
132 card->cccr.wide_bus = 1;
133
134 if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
135 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
136 if (ret)
137 goto out;
138
139 if (data & SDIO_POWER_SMPC)
140 card->cccr.high_power = 1;
141 }
142
143 if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
144 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
145 if (ret)
146 goto out;
147
148 card->scr.sda_spec3 = 0;
149 card->sw_caps.sd3_bus_mode = 0;
150 card->sw_caps.sd3_drv_type = 0;
151 if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
152 card->scr.sda_spec3 = 1;
153 ret = mmc_io_rw_direct(card, 0, 0,
154 SDIO_CCCR_UHS, 0, &data);
155 if (ret)
156 goto out;
157
158 if (mmc_host_uhs(card->host)) {
159 if (data & SDIO_UHS_DDR50)
160 card->sw_caps.sd3_bus_mode
161 |= SD_MODE_UHS_DDR50;
162
163 if (data & SDIO_UHS_SDR50)
164 card->sw_caps.sd3_bus_mode
165 |= SD_MODE_UHS_SDR50;
166
167 if (data & SDIO_UHS_SDR104)
168 card->sw_caps.sd3_bus_mode
169 |= SD_MODE_UHS_SDR104;
170 }
171
172 ret = mmc_io_rw_direct(card, 0, 0,
173 SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
174 if (ret)
175 goto out;
176
177 if (data & SDIO_DRIVE_SDTA)
178 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
179 if (data & SDIO_DRIVE_SDTC)
180 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
181 if (data & SDIO_DRIVE_SDTD)
182 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
183 }
184
185 /* if no uhs mode ensure we check for high speed */
186 if (!card->sw_caps.sd3_bus_mode) {
187 if (speed & SDIO_SPEED_SHS) {
188 card->cccr.high_speed = 1;
189 card->sw_caps.hs_max_dtr = 50000000;
190 } else {
191 card->cccr.high_speed = 0;
192 card->sw_caps.hs_max_dtr = 25000000;
193 }
194 }
195 }
196
197 out:
198 return ret;
199 }
200
201 static int sdio_enable_wide(struct mmc_card *card)
202 {
203 int ret;
204 u8 ctrl;
205
206 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
207 return 0;
208
209 if (card->cccr.low_speed && !card->cccr.wide_bus)
210 return 0;
211
212 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
213 if (ret)
214 return ret;
215
216 if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
217 pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
218 mmc_hostname(card->host), ctrl);
219
220 /* set as 4-bit bus width */
221 ctrl &= ~SDIO_BUS_WIDTH_MASK;
222 ctrl |= SDIO_BUS_WIDTH_4BIT;
223
224 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
225 if (ret)
226 return ret;
227
228 return 1;
229 }
230
231 /*
232 * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
233 * of the card. This may be required on certain setups of boards,
234 * controllers and embedded sdio device which do not need the card's
235 * pull-up. As a result, card detection is disabled and power is saved.
236 */
237 static int sdio_disable_cd(struct mmc_card *card)
238 {
239 int ret;
240 u8 ctrl;
241
242 if (!mmc_card_disable_cd(card))
243 return 0;
244
245 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
246 if (ret)
247 return ret;
248
249 ctrl |= SDIO_BUS_CD_DISABLE;
250
251 return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
252 }
253
254 /*
255 * Devices that remain active during a system suspend are
256 * put back into 1-bit mode.
257 */
258 static int sdio_disable_wide(struct mmc_card *card)
259 {
260 int ret;
261 u8 ctrl;
262
263 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
264 return 0;
265
266 if (card->cccr.low_speed && !card->cccr.wide_bus)
267 return 0;
268
269 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
270 if (ret)
271 return ret;
272
273 if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
274 return 0;
275
276 ctrl &= ~SDIO_BUS_WIDTH_4BIT;
277 ctrl |= SDIO_BUS_ASYNC_INT;
278
279 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
280 if (ret)
281 return ret;
282
283 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
284
285 return 0;
286 }
287
288
289 static int sdio_enable_4bit_bus(struct mmc_card *card)
290 {
291 int err;
292
293 if (card->type == MMC_TYPE_SDIO)
294 err = sdio_enable_wide(card);
295 else if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
296 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
297 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
298 if (err)
299 return err;
300 err = sdio_enable_wide(card);
301 if (err <= 0)
302 mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
303 } else
304 return 0;
305
306 if (err > 0) {
307 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
308 err = 0;
309 }
310
311 return err;
312 }
313
314
315 /*
316 * Test if the card supports high-speed mode and, if so, switch to it.
317 */
318 static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
319 {
320 int ret;
321 u8 speed;
322
323 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
324 return 0;
325
326 if (!card->cccr.high_speed)
327 return 0;
328
329 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
330 if (ret)
331 return ret;
332
333 if (enable)
334 speed |= SDIO_SPEED_EHS;
335 else
336 speed &= ~SDIO_SPEED_EHS;
337
338 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
339 if (ret)
340 return ret;
341
342 return 1;
343 }
344
345 /*
346 * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
347 */
348 static int sdio_enable_hs(struct mmc_card *card)
349 {
350 int ret;
351
352 ret = mmc_sdio_switch_hs(card, true);
353 if (ret <= 0 || card->type == MMC_TYPE_SDIO)
354 return ret;
355
356 ret = mmc_sd_switch_hs(card);
357 if (ret <= 0)
358 mmc_sdio_switch_hs(card, false);
359
360 return ret;
361 }
362
363 static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
364 {
365 unsigned max_dtr;
366
367 if (mmc_card_hs(card)) {
368 /*
369 * The SDIO specification doesn't mention how
370 * the CIS transfer speed register relates to
371 * high-speed, but it seems that 50 MHz is
372 * mandatory.
373 */
374 max_dtr = 50000000;
375 } else {
376 max_dtr = card->cis.max_dtr;
377 }
378
379 if (card->type == MMC_TYPE_SD_COMBO)
380 max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
381
382 return max_dtr;
383 }
384
385 static unsigned char host_drive_to_sdio_drive(int host_strength)
386 {
387 switch (host_strength) {
388 case MMC_SET_DRIVER_TYPE_A:
389 return SDIO_DTSx_SET_TYPE_A;
390 case MMC_SET_DRIVER_TYPE_B:
391 return SDIO_DTSx_SET_TYPE_B;
392 case MMC_SET_DRIVER_TYPE_C:
393 return SDIO_DTSx_SET_TYPE_C;
394 case MMC_SET_DRIVER_TYPE_D:
395 return SDIO_DTSx_SET_TYPE_D;
396 default:
397 return SDIO_DTSx_SET_TYPE_B;
398 }
399 }
400
401 static void sdio_select_driver_type(struct mmc_card *card)
402 {
403 int card_drv_type, drive_strength, drv_type;
404 unsigned char card_strength;
405 int err;
406
407 card->drive_strength = 0;
408
409 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
410
411 drive_strength = mmc_select_drive_strength(card,
412 card->sw_caps.uhs_max_dtr,
413 card_drv_type, &drv_type);
414
415 if (drive_strength) {
416 /* if error just use default for drive strength B */
417 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
418 &card_strength);
419 if (err)
420 return;
421
422 card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
423 card_strength |= host_drive_to_sdio_drive(drive_strength);
424
425 /* if error default to drive strength B */
426 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
427 card_strength, NULL);
428 if (err)
429 return;
430 card->drive_strength = drive_strength;
431 }
432
433 if (drv_type)
434 mmc_set_driver_type(card->host, drv_type);
435 }
436
437
438 static int sdio_set_bus_speed_mode(struct mmc_card *card)
439 {
440 unsigned int bus_speed, timing;
441 int err;
442 unsigned char speed;
443
444 /*
445 * If the host doesn't support any of the UHS-I modes, fallback on
446 * default speed.
447 */
448 if (!mmc_host_uhs(card->host))
449 return 0;
450
451 bus_speed = SDIO_SPEED_SDR12;
452 timing = MMC_TIMING_UHS_SDR12;
453 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
454 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
455 bus_speed = SDIO_SPEED_SDR104;
456 timing = MMC_TIMING_UHS_SDR104;
457 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
458 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
459 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
460 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
461 bus_speed = SDIO_SPEED_DDR50;
462 timing = MMC_TIMING_UHS_DDR50;
463 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
464 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
465 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
466 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
467 SD_MODE_UHS_SDR50)) {
468 bus_speed = SDIO_SPEED_SDR50;
469 timing = MMC_TIMING_UHS_SDR50;
470 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
471 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
472 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
473 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
474 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
475 bus_speed = SDIO_SPEED_SDR25;
476 timing = MMC_TIMING_UHS_SDR25;
477 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
478 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
479 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
480 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
481 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
482 SD_MODE_UHS_SDR12)) {
483 bus_speed = SDIO_SPEED_SDR12;
484 timing = MMC_TIMING_UHS_SDR12;
485 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
486 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
487 }
488
489 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
490 if (err)
491 return err;
492
493 speed &= ~SDIO_SPEED_BSS_MASK;
494 speed |= bus_speed;
495 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
496 if (err)
497 return err;
498
499 if (bus_speed) {
500 mmc_set_timing(card->host, timing);
501 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
502 }
503
504 return 0;
505 }
506
507 /*
508 * UHS-I specific initialization procedure
509 */
510 static int mmc_sdio_init_uhs_card(struct mmc_card *card)
511 {
512 int err;
513
514 if (!card->scr.sda_spec3)
515 return 0;
516
517 /*
518 * Switch to wider bus (if supported).
519 */
520 if (card->host->caps & MMC_CAP_4_BIT_DATA)
521 err = sdio_enable_4bit_bus(card);
522
523 /* Set the driver strength for the card */
524 sdio_select_driver_type(card);
525
526 /* Set bus speed mode of the card */
527 err = sdio_set_bus_speed_mode(card);
528 if (err)
529 goto out;
530
531 /*
532 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
533 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
534 */
535 if (!mmc_host_is_spi(card->host) &&
536 ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
537 (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
538 err = mmc_execute_tuning(card);
539 out:
540 return err;
541 }
542
543 /*
544 * Handle the detection and initialisation of a card.
545 *
546 * In the case of a resume, "oldcard" will contain the card
547 * we're trying to reinitialise.
548 */
549 static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
550 struct mmc_card *oldcard, int powered_resume)
551 {
552 struct mmc_card *card;
553 int err;
554 int retries = 10;
555 u32 rocr = 0;
556 u32 ocr_card = ocr;
557
558 BUG_ON(!host);
559 WARN_ON(!host->claimed);
560
561 /* to query card if 1.8V signalling is supported */
562 if (mmc_host_uhs(host))
563 ocr |= R4_18V_PRESENT;
564
565 try_again:
566 if (!retries) {
567 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
568 ocr &= ~R4_18V_PRESENT;
569 }
570
571 /*
572 * Inform the card of the voltage
573 */
574 if (!powered_resume) {
575 err = mmc_send_io_op_cond(host, ocr, &rocr);
576 if (err)
577 goto err;
578 }
579
580 /*
581 * For SPI, enable CRC as appropriate.
582 */
583 if (mmc_host_is_spi(host)) {
584 err = mmc_spi_set_crc(host, use_spi_crc);
585 if (err)
586 goto err;
587 }
588
589 /*
590 * Allocate card structure.
591 */
592 card = mmc_alloc_card(host, NULL);
593 if (IS_ERR(card)) {
594 err = PTR_ERR(card);
595 goto err;
596 }
597
598 if ((rocr & R4_MEMORY_PRESENT) &&
599 mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) {
600 card->type = MMC_TYPE_SD_COMBO;
601
602 if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
603 memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
604 mmc_remove_card(card);
605 return -ENOENT;
606 }
607 } else {
608 card->type = MMC_TYPE_SDIO;
609
610 if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
611 mmc_remove_card(card);
612 return -ENOENT;
613 }
614 }
615
616 /*
617 * Call the optional HC's init_card function to handle quirks.
618 */
619 if (host->ops->init_card)
620 host->ops->init_card(host, card);
621
622 /*
623 * If the host and card support UHS-I mode request the card
624 * to switch to 1.8V signaling level. No 1.8v signalling if
625 * UHS mode is not enabled to maintain compatibility and some
626 * systems that claim 1.8v signalling in fact do not support
627 * it.
628 */
629 if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) {
630 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
631 ocr_card);
632 if (err == -EAGAIN) {
633 sdio_reset(host);
634 mmc_go_idle(host);
635 mmc_send_if_cond(host, host->ocr_avail);
636 mmc_remove_card(card);
637 retries--;
638 goto try_again;
639 } else if (err) {
640 ocr &= ~R4_18V_PRESENT;
641 }
642 err = 0;
643 } else {
644 ocr &= ~R4_18V_PRESENT;
645 }
646
647 /*
648 * For native busses: set card RCA and quit open drain mode.
649 */
650 if (!powered_resume && !mmc_host_is_spi(host)) {
651 err = mmc_send_relative_addr(host, &card->rca);
652 if (err)
653 goto remove;
654
655 /*
656 * Update oldcard with the new RCA received from the SDIO
657 * device -- we're doing this so that it's updated in the
658 * "card" struct when oldcard overwrites that later.
659 */
660 if (oldcard)
661 oldcard->rca = card->rca;
662 }
663
664 /*
665 * Read CSD, before selecting the card
666 */
667 if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
668 err = mmc_sd_get_csd(host, card);
669 if (err)
670 return err;
671
672 mmc_decode_cid(card);
673 }
674
675 /*
676 * Select card, as all following commands rely on that.
677 */
678 if (!powered_resume && !mmc_host_is_spi(host)) {
679 err = mmc_select_card(card);
680 if (err)
681 goto remove;
682 }
683
684 if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
685 /*
686 * This is non-standard SDIO device, meaning it doesn't
687 * have any CIA (Common I/O area) registers present.
688 * It's host's responsibility to fill cccr and cis
689 * structures in init_card().
690 */
691 mmc_set_clock(host, card->cis.max_dtr);
692
693 if (card->cccr.high_speed) {
694 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
695 }
696
697 goto finish;
698 }
699
700 /*
701 * Read the common registers.
702 */
703 err = sdio_read_cccr(card, ocr);
704 if (err)
705 goto remove;
706
707 /*
708 * Read the common CIS tuples.
709 */
710 err = sdio_read_common_cis(card);
711 if (err)
712 goto remove;
713
714 if (oldcard) {
715 int same = (card->cis.vendor == oldcard->cis.vendor &&
716 card->cis.device == oldcard->cis.device);
717 mmc_remove_card(card);
718 if (!same)
719 return -ENOENT;
720
721 card = oldcard;
722 }
723 card->ocr = ocr_card;
724 mmc_fixup_device(card, NULL);
725
726 if (card->type == MMC_TYPE_SD_COMBO) {
727 err = mmc_sd_setup_card(host, card, oldcard != NULL);
728 /* handle as SDIO-only card if memory init failed */
729 if (err) {
730 mmc_go_idle(host);
731 if (mmc_host_is_spi(host))
732 /* should not fail, as it worked previously */
733 mmc_spi_set_crc(host, use_spi_crc);
734 card->type = MMC_TYPE_SDIO;
735 } else
736 card->dev.type = &sd_type;
737 }
738
739 /*
740 * If needed, disconnect card detection pull-up resistor.
741 */
742 err = sdio_disable_cd(card);
743 if (err)
744 goto remove;
745
746 /* Initialization sequence for UHS-I cards */
747 /* Only if card supports 1.8v and UHS signaling */
748 if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
749 err = mmc_sdio_init_uhs_card(card);
750 if (err)
751 goto remove;
752 } else {
753 /*
754 * Switch to high-speed (if supported).
755 */
756 err = sdio_enable_hs(card);
757 if (err > 0)
758 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
759 else if (err)
760 goto remove;
761
762 /*
763 * Change to the card's maximum speed.
764 */
765 mmc_set_clock(host, mmc_sdio_get_max_clock(card));
766
767 /*
768 * Switch to wider bus (if supported).
769 */
770 err = sdio_enable_4bit_bus(card);
771 if (err)
772 goto remove;
773 }
774 finish:
775 if (!oldcard)
776 host->card = card;
777 return 0;
778
779 remove:
780 if (!oldcard)
781 mmc_remove_card(card);
782
783 err:
784 return err;
785 }
786
787 /*
788 * Host is being removed. Free up the current card.
789 */
790 static void mmc_sdio_remove(struct mmc_host *host)
791 {
792 int i;
793
794 BUG_ON(!host);
795 BUG_ON(!host->card);
796
797 for (i = 0;i < host->card->sdio_funcs;i++) {
798 if (host->card->sdio_func[i]) {
799 sdio_remove_func(host->card->sdio_func[i]);
800 host->card->sdio_func[i] = NULL;
801 }
802 }
803
804 mmc_remove_card(host->card);
805 host->card = NULL;
806 }
807
808 /*
809 * Card detection - card is alive.
810 */
811 static int mmc_sdio_alive(struct mmc_host *host)
812 {
813 return mmc_select_card(host->card);
814 }
815
816 /*
817 * Card detection callback from host.
818 */
819 static void mmc_sdio_detect(struct mmc_host *host)
820 {
821 int err;
822
823 BUG_ON(!host);
824 BUG_ON(!host->card);
825
826 /* Make sure card is powered before detecting it */
827 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
828 err = pm_runtime_get_sync(&host->card->dev);
829 if (err < 0) {
830 pm_runtime_put_noidle(&host->card->dev);
831 goto out;
832 }
833 }
834
835 mmc_claim_host(host);
836
837 /*
838 * Just check if our card has been removed.
839 */
840 err = _mmc_detect_card_removed(host);
841
842 mmc_release_host(host);
843
844 /*
845 * Tell PM core it's OK to power off the card now.
846 *
847 * The _sync variant is used in order to ensure that the card
848 * is left powered off in case an error occurred, and the card
849 * is going to be removed.
850 *
851 * Since there is no specific reason to believe a new user
852 * is about to show up at this point, the _sync variant is
853 * desirable anyway.
854 */
855 if (host->caps & MMC_CAP_POWER_OFF_CARD)
856 pm_runtime_put_sync(&host->card->dev);
857
858 out:
859 if (err) {
860 mmc_sdio_remove(host);
861
862 mmc_claim_host(host);
863 mmc_detach_bus(host);
864 mmc_power_off(host);
865 mmc_release_host(host);
866 }
867 }
868
869 /*
870 * SDIO pre_suspend. We need to suspend all functions separately.
871 * Therefore all registered functions must have drivers with suspend
872 * and resume methods. Failing that we simply remove the whole card.
873 */
874 static int mmc_sdio_pre_suspend(struct mmc_host *host)
875 {
876 int i, err = 0;
877
878 for (i = 0; i < host->card->sdio_funcs; i++) {
879 struct sdio_func *func = host->card->sdio_func[i];
880 if (func && sdio_func_present(func) && func->dev.driver) {
881 const struct dev_pm_ops *pmops = func->dev.driver->pm;
882 if (!pmops || !pmops->suspend || !pmops->resume) {
883 /* force removal of entire card in that case */
884 err = -ENOSYS;
885 break;
886 }
887 }
888 }
889
890 return err;
891 }
892
893 /*
894 * SDIO suspend. Suspend all functions separately.
895 */
896 static int mmc_sdio_suspend(struct mmc_host *host)
897 {
898 mmc_claim_host(host);
899
900 if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
901 sdio_disable_wide(host->card);
902
903 if (!mmc_card_keep_power(host)) {
904 mmc_power_off(host);
905 } else if (host->retune_period) {
906 mmc_retune_timer_stop(host);
907 mmc_retune_needed(host);
908 }
909
910 mmc_release_host(host);
911
912 return 0;
913 }
914
915 static int mmc_sdio_resume(struct mmc_host *host)
916 {
917 int err = 0;
918
919 BUG_ON(!host);
920 BUG_ON(!host->card);
921
922 /* Basic card reinitialization. */
923 mmc_claim_host(host);
924
925 /* Restore power if needed */
926 if (!mmc_card_keep_power(host)) {
927 mmc_power_up(host, host->card->ocr);
928 /*
929 * Tell runtime PM core we just powered up the card,
930 * since it still believes the card is powered off.
931 * Note that currently runtime PM is only enabled
932 * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
933 */
934 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
935 pm_runtime_disable(&host->card->dev);
936 pm_runtime_set_active(&host->card->dev);
937 pm_runtime_enable(&host->card->dev);
938 }
939 }
940
941 /* No need to reinitialize powered-resumed nonremovable cards */
942 if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) {
943 sdio_reset(host);
944 mmc_go_idle(host);
945 mmc_send_if_cond(host, host->card->ocr);
946 err = mmc_send_io_op_cond(host, 0, NULL);
947 if (!err)
948 err = mmc_sdio_init_card(host, host->card->ocr,
949 host->card,
950 mmc_card_keep_power(host));
951 } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
952 /* We may have switched to 1-bit mode during suspend */
953 err = sdio_enable_4bit_bus(host->card);
954 }
955
956 if (!err && host->sdio_irqs) {
957 if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
958 wake_up_process(host->sdio_irq_thread);
959 else if (host->caps & MMC_CAP_SDIO_IRQ)
960 host->ops->enable_sdio_irq(host, 1);
961 }
962
963 mmc_release_host(host);
964
965 host->pm_flags &= ~MMC_PM_KEEP_POWER;
966 return err;
967 }
968
969 static int mmc_sdio_power_restore(struct mmc_host *host)
970 {
971 int ret;
972
973 BUG_ON(!host);
974 BUG_ON(!host->card);
975
976 mmc_claim_host(host);
977
978 /*
979 * Reset the card by performing the same steps that are taken by
980 * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe.
981 *
982 * sdio_reset() is technically not needed. Having just powered up the
983 * hardware, it should already be in reset state. However, some
984 * platforms (such as SD8686 on OLPC) do not instantly cut power,
985 * meaning that a reset is required when restoring power soon after
986 * powering off. It is harmless in other cases.
987 *
988 * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec,
989 * is not necessary for non-removable cards. However, it is required
990 * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and
991 * harmless in other situations.
992 *
993 */
994
995 sdio_reset(host);
996 mmc_go_idle(host);
997 mmc_send_if_cond(host, host->card->ocr);
998
999 ret = mmc_send_io_op_cond(host, 0, NULL);
1000 if (ret)
1001 goto out;
1002
1003 ret = mmc_sdio_init_card(host, host->card->ocr, host->card,
1004 mmc_card_keep_power(host));
1005 if (!ret && host->sdio_irqs)
1006 mmc_signal_sdio_irq(host);
1007
1008 out:
1009 mmc_release_host(host);
1010
1011 return ret;
1012 }
1013
1014 static int mmc_sdio_runtime_suspend(struct mmc_host *host)
1015 {
1016 /* No references to the card, cut the power to it. */
1017 mmc_claim_host(host);
1018 mmc_power_off(host);
1019 mmc_release_host(host);
1020
1021 return 0;
1022 }
1023
1024 static int mmc_sdio_runtime_resume(struct mmc_host *host)
1025 {
1026 int ret;
1027
1028 /* Restore power and re-initialize. */
1029 mmc_claim_host(host);
1030 mmc_power_up(host, host->card->ocr);
1031 ret = mmc_sdio_power_restore(host);
1032 mmc_release_host(host);
1033
1034 return ret;
1035 }
1036
1037 static int mmc_sdio_reset(struct mmc_host *host)
1038 {
1039 mmc_power_cycle(host, host->card->ocr);
1040 return mmc_sdio_power_restore(host);
1041 }
1042
1043 static const struct mmc_bus_ops mmc_sdio_ops = {
1044 .remove = mmc_sdio_remove,
1045 .detect = mmc_sdio_detect,
1046 .pre_suspend = mmc_sdio_pre_suspend,
1047 .suspend = mmc_sdio_suspend,
1048 .resume = mmc_sdio_resume,
1049 .runtime_suspend = mmc_sdio_runtime_suspend,
1050 .runtime_resume = mmc_sdio_runtime_resume,
1051 .power_restore = mmc_sdio_power_restore,
1052 .alive = mmc_sdio_alive,
1053 .reset = mmc_sdio_reset,
1054 };
1055
1056
1057 /*
1058 * Starting point for SDIO card init.
1059 */
1060 int mmc_attach_sdio(struct mmc_host *host)
1061 {
1062 int err, i, funcs;
1063 u32 ocr, rocr;
1064 struct mmc_card *card;
1065
1066 BUG_ON(!host);
1067 WARN_ON(!host->claimed);
1068
1069 err = mmc_send_io_op_cond(host, 0, &ocr);
1070 if (err)
1071 return err;
1072
1073 mmc_attach_bus(host, &mmc_sdio_ops);
1074 if (host->ocr_avail_sdio)
1075 host->ocr_avail = host->ocr_avail_sdio;
1076
1077
1078 rocr = mmc_select_voltage(host, ocr);
1079
1080 /*
1081 * Can we support the voltage(s) of the card(s)?
1082 */
1083 if (!rocr) {
1084 err = -EINVAL;
1085 goto err;
1086 }
1087
1088 /*
1089 * Detect and init the card.
1090 */
1091 err = mmc_sdio_init_card(host, rocr, NULL, 0);
1092 if (err)
1093 goto err;
1094
1095 card = host->card;
1096
1097 /*
1098 * Enable runtime PM only if supported by host+card+board
1099 */
1100 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
1101 /*
1102 * Let runtime PM core know our card is active
1103 */
1104 err = pm_runtime_set_active(&card->dev);
1105 if (err)
1106 goto remove;
1107
1108 /*
1109 * Enable runtime PM for this card
1110 */
1111 pm_runtime_enable(&card->dev);
1112 }
1113
1114 /*
1115 * The number of functions on the card is encoded inside
1116 * the ocr.
1117 */
1118 funcs = (ocr & 0x70000000) >> 28;
1119 card->sdio_funcs = 0;
1120
1121 /*
1122 * Initialize (but don't add) all present functions.
1123 */
1124 for (i = 0; i < funcs; i++, card->sdio_funcs++) {
1125 err = sdio_init_func(host->card, i + 1);
1126 if (err)
1127 goto remove;
1128
1129 /*
1130 * Enable Runtime PM for this func (if supported)
1131 */
1132 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1133 pm_runtime_enable(&card->sdio_func[i]->dev);
1134 }
1135
1136 /*
1137 * First add the card to the driver model...
1138 */
1139 mmc_release_host(host);
1140 err = mmc_add_card(host->card);
1141 if (err)
1142 goto remove_added;
1143
1144 /*
1145 * ...then the SDIO functions.
1146 */
1147 for (i = 0;i < funcs;i++) {
1148 err = sdio_add_func(host->card->sdio_func[i]);
1149 if (err)
1150 goto remove_added;
1151 }
1152
1153 mmc_claim_host(host);
1154 return 0;
1155
1156
1157 remove_added:
1158 /* Remove without lock if the device has been added. */
1159 mmc_sdio_remove(host);
1160 mmc_claim_host(host);
1161 remove:
1162 /* And with lock if it hasn't been added. */
1163 mmc_release_host(host);
1164 if (host->card)
1165 mmc_sdio_remove(host);
1166 mmc_claim_host(host);
1167 err:
1168 mmc_detach_bus(host);
1169
1170 pr_err("%s: error %d whilst initialising SDIO card\n",
1171 mmc_hostname(host), err);
1172
1173 return err;
1174 }
1175
Linux with added FPC-III support