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> | |
a4924c71 | 17 | #include <linux/mmc/mmc.h> |
35c66c19 | 18 | #include <linux/mmc/sdio.h> |
e29a7d73 | 19 | #include <linux/mmc/sdio_func.h> |
eab40687 | 20 | #include <linux/mmc/sdio_ids.h> |
5c4e6f13 PO |
21 | |
22 | #include "core.h" | |
23 | #include "bus.h" | |
71578a1e | 24 | #include "sd.h" |
e29a7d73 | 25 | #include "sdio_bus.h" |
5c4e6f13 PO |
26 | #include "mmc_ops.h" |
27 | #include "sd_ops.h" | |
28 | #include "sdio_ops.h" | |
b7261261 | 29 | #include "sdio_cis.h" |
5c4e6f13 | 30 | |
0597007f PO |
31 | static int sdio_read_fbr(struct sdio_func *func) |
32 | { | |
33 | int ret; | |
34 | unsigned char data; | |
35 | ||
eab40687 OBC |
36 | if (mmc_card_nonstd_func_interface(func->card)) { |
37 | func->class = SDIO_CLASS_NONE; | |
38 | return 0; | |
39 | } | |
40 | ||
0597007f | 41 | ret = mmc_io_rw_direct(func->card, 0, 0, |
7616ee95 | 42 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data); |
0597007f PO |
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, | |
7616ee95 | 50 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data); |
0597007f PO |
51 | if (ret) |
52 | goto out; | |
53 | } | |
54 | ||
55 | func->class = data; | |
56 | ||
57 | out: | |
58 | return ret; | |
59 | } | |
60 | ||
e29a7d73 PO |
61 | static int sdio_init_func(struct mmc_card *card, unsigned int fn) |
62 | { | |
0597007f | 63 | int ret; |
e29a7d73 PO |
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 | ||
6f51be3d GI |
74 | if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) { |
75 | ret = sdio_read_fbr(func); | |
76 | if (ret) | |
77 | goto fail; | |
0597007f | 78 | |
6f51be3d GI |
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 | } | |
b7261261 | 87 | |
e29a7d73 PO |
88 | card->sdio_func[fn - 1] = func; |
89 | ||
90 | return 0; | |
0597007f PO |
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; | |
e29a7d73 PO |
99 | } |
100 | ||
2d0d68f5 | 101 | static int sdio_read_cccr(struct mmc_card *card, u32 ocr) |
35c66c19 PO |
102 | { |
103 | int ret; | |
104 | int cccr_vsn; | |
2d0d68f5 | 105 | int uhs = ocr & R4_18V_PRESENT; |
35c66c19 | 106 | unsigned char data; |
a303c531 | 107 | unsigned char speed; |
35c66c19 PO |
108 | |
109 | memset(&card->cccr, 0, sizeof(struct sdio_cccr)); | |
110 | ||
111 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); | |
112 | if (ret) | |
113 | goto out; | |
114 | ||
115 | cccr_vsn = data & 0x0f; | |
116 | ||
b4625dab | 117 | if (cccr_vsn > SDIO_CCCR_REV_3_00) { |
a3c76eb9 | 118 | pr_err("%s: unrecognised CCCR structure version %d\n", |
35c66c19 PO |
119 | mmc_hostname(card->host), cccr_vsn); |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | card->cccr.sdio_vsn = (data & 0xf0) >> 4; | |
124 | ||
125 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); | |
126 | if (ret) | |
127 | goto out; | |
128 | ||
129 | if (data & SDIO_CCCR_CAP_SMB) | |
130 | card->cccr.multi_block = 1; | |
131 | if (data & SDIO_CCCR_CAP_LSC) | |
132 | card->cccr.low_speed = 1; | |
133 | if (data & SDIO_CCCR_CAP_4BLS) | |
134 | card->cccr.wide_bus = 1; | |
135 | ||
136 | if (cccr_vsn >= SDIO_CCCR_REV_1_10) { | |
137 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); | |
138 | if (ret) | |
139 | goto out; | |
140 | ||
141 | if (data & SDIO_POWER_SMPC) | |
142 | card->cccr.high_power = 1; | |
143 | } | |
144 | ||
145 | if (cccr_vsn >= SDIO_CCCR_REV_1_20) { | |
a303c531 | 146 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); |
35c66c19 PO |
147 | if (ret) |
148 | goto out; | |
149 | ||
a303c531 PR |
150 | card->scr.sda_spec3 = 0; |
151 | card->sw_caps.sd3_bus_mode = 0; | |
152 | card->sw_caps.sd3_drv_type = 0; | |
2d0d68f5 | 153 | if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) { |
a303c531 PR |
154 | card->scr.sda_spec3 = 1; |
155 | ret = mmc_io_rw_direct(card, 0, 0, | |
156 | SDIO_CCCR_UHS, 0, &data); | |
157 | if (ret) | |
158 | goto out; | |
159 | ||
41875e38 | 160 | if (mmc_host_uhs(card->host)) { |
a303c531 PR |
161 | if (data & SDIO_UHS_DDR50) |
162 | card->sw_caps.sd3_bus_mode | |
163 | |= SD_MODE_UHS_DDR50; | |
164 | ||
165 | if (data & SDIO_UHS_SDR50) | |
166 | card->sw_caps.sd3_bus_mode | |
167 | |= SD_MODE_UHS_SDR50; | |
168 | ||
169 | if (data & SDIO_UHS_SDR104) | |
170 | card->sw_caps.sd3_bus_mode | |
171 | |= SD_MODE_UHS_SDR104; | |
172 | } | |
173 | ||
174 | ret = mmc_io_rw_direct(card, 0, 0, | |
175 | SDIO_CCCR_DRIVE_STRENGTH, 0, &data); | |
176 | if (ret) | |
177 | goto out; | |
178 | ||
179 | if (data & SDIO_DRIVE_SDTA) | |
180 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A; | |
181 | if (data & SDIO_DRIVE_SDTC) | |
182 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C; | |
183 | if (data & SDIO_DRIVE_SDTD) | |
184 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D; | |
185 | } | |
186 | ||
187 | /* if no uhs mode ensure we check for high speed */ | |
188 | if (!card->sw_caps.sd3_bus_mode) { | |
189 | if (speed & SDIO_SPEED_SHS) { | |
190 | card->cccr.high_speed = 1; | |
191 | card->sw_caps.hs_max_dtr = 50000000; | |
192 | } else { | |
193 | card->cccr.high_speed = 0; | |
194 | card->sw_caps.hs_max_dtr = 25000000; | |
195 | } | |
196 | } | |
35c66c19 PO |
197 | } |
198 | ||
199 | out: | |
200 | return ret; | |
201 | } | |
202 | ||
4ff6471c PO |
203 | static int sdio_enable_wide(struct mmc_card *card) |
204 | { | |
205 | int ret; | |
206 | u8 ctrl; | |
207 | ||
208 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
209 | return 0; | |
210 | ||
211 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
212 | return 0; | |
213 | ||
214 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
215 | if (ret) | |
216 | return ret; | |
217 | ||
2a0fe914 | 218 | if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED) |
6606110d JP |
219 | pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n", |
220 | mmc_hostname(card->host), ctrl); | |
2a0fe914 YD |
221 | |
222 | /* set as 4-bit bus width */ | |
223 | ctrl &= ~SDIO_BUS_WIDTH_MASK; | |
4ff6471c PO |
224 | ctrl |= SDIO_BUS_WIDTH_4BIT; |
225 | ||
226 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
227 | if (ret) | |
228 | return ret; | |
229 | ||
7310ece8 | 230 | return 1; |
4ff6471c PO |
231 | } |
232 | ||
006ebd5d OBC |
233 | /* |
234 | * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1) | |
235 | * of the card. This may be required on certain setups of boards, | |
236 | * controllers and embedded sdio device which do not need the card's | |
237 | * pull-up. As a result, card detection is disabled and power is saved. | |
238 | */ | |
239 | static int sdio_disable_cd(struct mmc_card *card) | |
240 | { | |
241 | int ret; | |
242 | u8 ctrl; | |
243 | ||
2059a02d | 244 | if (!mmc_card_disable_cd(card)) |
006ebd5d OBC |
245 | return 0; |
246 | ||
247 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
248 | if (ret) | |
249 | return ret; | |
250 | ||
251 | ctrl |= SDIO_BUS_CD_DISABLE; | |
252 | ||
253 | return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
254 | } | |
255 | ||
6b5eda36 DD |
256 | /* |
257 | * Devices that remain active during a system suspend are | |
258 | * put back into 1-bit mode. | |
259 | */ | |
260 | static int sdio_disable_wide(struct mmc_card *card) | |
261 | { | |
262 | int ret; | |
263 | u8 ctrl; | |
264 | ||
265 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
266 | return 0; | |
267 | ||
268 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
269 | return 0; | |
270 | ||
271 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
272 | if (ret) | |
273 | return ret; | |
274 | ||
275 | if (!(ctrl & SDIO_BUS_WIDTH_4BIT)) | |
276 | return 0; | |
277 | ||
278 | ctrl &= ~SDIO_BUS_WIDTH_4BIT; | |
279 | ctrl |= SDIO_BUS_ASYNC_INT; | |
280 | ||
281 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
282 | if (ret) | |
283 | return ret; | |
284 | ||
285 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
7310ece8 MM |
290 | |
291 | static int sdio_enable_4bit_bus(struct mmc_card *card) | |
292 | { | |
293 | int err; | |
294 | ||
295 | if (card->type == MMC_TYPE_SDIO) | |
303dbedc N |
296 | err = sdio_enable_wide(card); |
297 | else if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
298 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
7310ece8 MM |
299 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
300 | if (err) | |
301 | return err; | |
303dbedc N |
302 | err = sdio_enable_wide(card); |
303 | if (err <= 0) | |
304 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); | |
7310ece8 MM |
305 | } else |
306 | return 0; | |
307 | ||
303dbedc N |
308 | if (err > 0) { |
309 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
310 | err = 0; | |
311 | } | |
7310ece8 MM |
312 | |
313 | return err; | |
314 | } | |
315 | ||
316 | ||
d16f5770 PO |
317 | /* |
318 | * Test if the card supports high-speed mode and, if so, switch to it. | |
319 | */ | |
7310ece8 | 320 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
d16f5770 PO |
321 | { |
322 | int ret; | |
323 | u8 speed; | |
324 | ||
325 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) | |
326 | return 0; | |
327 | ||
328 | if (!card->cccr.high_speed) | |
329 | return 0; | |
330 | ||
331 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
332 | if (ret) | |
333 | return ret; | |
334 | ||
7310ece8 MM |
335 | if (enable) |
336 | speed |= SDIO_SPEED_EHS; | |
337 | else | |
338 | speed &= ~SDIO_SPEED_EHS; | |
d16f5770 PO |
339 | |
340 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
341 | if (ret) | |
342 | return ret; | |
343 | ||
71578a1e MM |
344 | return 1; |
345 | } | |
d16f5770 | 346 | |
7310ece8 MM |
347 | /* |
348 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. | |
349 | */ | |
350 | static int sdio_enable_hs(struct mmc_card *card) | |
351 | { | |
352 | int ret; | |
353 | ||
354 | ret = mmc_sdio_switch_hs(card, true); | |
355 | if (ret <= 0 || card->type == MMC_TYPE_SDIO) | |
356 | return ret; | |
357 | ||
358 | ret = mmc_sd_switch_hs(card); | |
359 | if (ret <= 0) | |
360 | mmc_sdio_switch_hs(card, false); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
71578a1e MM |
365 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
366 | { | |
367 | unsigned max_dtr; | |
368 | ||
cdc99179 | 369 | if (mmc_card_hs(card)) { |
71578a1e MM |
370 | /* |
371 | * The SDIO specification doesn't mention how | |
372 | * the CIS transfer speed register relates to | |
373 | * high-speed, but it seems that 50 MHz is | |
374 | * mandatory. | |
375 | */ | |
376 | max_dtr = 50000000; | |
377 | } else { | |
378 | max_dtr = card->cis.max_dtr; | |
379 | } | |
380 | ||
7310ece8 MM |
381 | if (card->type == MMC_TYPE_SD_COMBO) |
382 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); | |
383 | ||
71578a1e | 384 | return max_dtr; |
d16f5770 PO |
385 | } |
386 | ||
a303c531 PR |
387 | static unsigned char host_drive_to_sdio_drive(int host_strength) |
388 | { | |
389 | switch (host_strength) { | |
390 | case MMC_SET_DRIVER_TYPE_A: | |
391 | return SDIO_DTSx_SET_TYPE_A; | |
392 | case MMC_SET_DRIVER_TYPE_B: | |
393 | return SDIO_DTSx_SET_TYPE_B; | |
394 | case MMC_SET_DRIVER_TYPE_C: | |
395 | return SDIO_DTSx_SET_TYPE_C; | |
396 | case MMC_SET_DRIVER_TYPE_D: | |
397 | return SDIO_DTSx_SET_TYPE_D; | |
398 | default: | |
399 | return SDIO_DTSx_SET_TYPE_B; | |
400 | } | |
401 | } | |
402 | ||
403 | static void sdio_select_driver_type(struct mmc_card *card) | |
404 | { | |
405 | int host_drv_type = SD_DRIVER_TYPE_B; | |
fa021cef | 406 | int card_drv_type, drive_strength, drv_type; |
a303c531 PR |
407 | unsigned char card_strength; |
408 | int err; | |
409 | ||
a303c531 PR |
410 | if (!card->host->ops->select_drive_strength) |
411 | return; | |
412 | ||
413 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) | |
414 | host_drv_type |= SD_DRIVER_TYPE_A; | |
415 | ||
416 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) | |
417 | host_drv_type |= SD_DRIVER_TYPE_C; | |
418 | ||
419 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) | |
420 | host_drv_type |= SD_DRIVER_TYPE_D; | |
421 | ||
fa021cef | 422 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
a303c531 PR |
423 | |
424 | /* | |
425 | * The drive strength that the hardware can support | |
426 | * depends on the board design. Pass the appropriate | |
427 | * information and let the hardware specific code | |
428 | * return what is possible given the options | |
429 | */ | |
f168359e | 430 | drive_strength = card->host->ops->select_drive_strength(card, |
a303c531 | 431 | card->sw_caps.uhs_max_dtr, |
b4f30a17 | 432 | host_drv_type, card_drv_type, &drv_type); |
a303c531 | 433 | |
b4f30a17 AH |
434 | if (drive_strength) { |
435 | /* if error just use default for drive strength B */ | |
436 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0, | |
437 | &card_strength); | |
438 | if (err) | |
439 | return; | |
a303c531 | 440 | |
b4f30a17 AH |
441 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); |
442 | card_strength |= host_drive_to_sdio_drive(drive_strength); | |
a303c531 | 443 | |
b4f30a17 AH |
444 | /* if error default to drive strength B */ |
445 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH, | |
446 | card_strength, NULL); | |
447 | if (err) | |
448 | return; | |
449 | } | |
a303c531 | 450 | |
b4f30a17 AH |
451 | if (drv_type) |
452 | mmc_set_driver_type(card->host, drv_type); | |
a303c531 PR |
453 | } |
454 | ||
455 | ||
456 | static int sdio_set_bus_speed_mode(struct mmc_card *card) | |
457 | { | |
458 | unsigned int bus_speed, timing; | |
459 | int err; | |
460 | unsigned char speed; | |
461 | ||
462 | /* | |
463 | * If the host doesn't support any of the UHS-I modes, fallback on | |
464 | * default speed. | |
465 | */ | |
41875e38 | 466 | if (!mmc_host_uhs(card->host)) |
a303c531 PR |
467 | return 0; |
468 | ||
469 | bus_speed = SDIO_SPEED_SDR12; | |
470 | timing = MMC_TIMING_UHS_SDR12; | |
471 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
472 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
473 | bus_speed = SDIO_SPEED_SDR104; | |
474 | timing = MMC_TIMING_UHS_SDR104; | |
475 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
77e2ff08 | 476 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
a303c531 PR |
477 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
478 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
479 | bus_speed = SDIO_SPEED_DDR50; | |
480 | timing = MMC_TIMING_UHS_DDR50; | |
481 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
77e2ff08 | 482 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
a303c531 PR |
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 = SDIO_SPEED_SDR50; | |
487 | timing = MMC_TIMING_UHS_SDR50; | |
488 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
77e2ff08 | 489 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
a303c531 PR |
490 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
491 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
492 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
493 | bus_speed = SDIO_SPEED_SDR25; | |
494 | timing = MMC_TIMING_UHS_SDR25; | |
495 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
77e2ff08 | 496 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
a303c531 PR |
497 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
498 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
499 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
500 | SD_MODE_UHS_SDR12)) { | |
501 | bus_speed = SDIO_SPEED_SDR12; | |
502 | timing = MMC_TIMING_UHS_SDR12; | |
503 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
77e2ff08 | 504 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
a303c531 PR |
505 | } |
506 | ||
507 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
508 | if (err) | |
509 | return err; | |
510 | ||
511 | speed &= ~SDIO_SPEED_BSS_MASK; | |
512 | speed |= bus_speed; | |
513 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
514 | if (err) | |
515 | return err; | |
516 | ||
517 | if (bus_speed) { | |
518 | mmc_set_timing(card->host, timing); | |
519 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
520 | } | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | /* | |
526 | * UHS-I specific initialization procedure | |
527 | */ | |
528 | static int mmc_sdio_init_uhs_card(struct mmc_card *card) | |
529 | { | |
530 | int err; | |
531 | ||
532 | if (!card->scr.sda_spec3) | |
533 | return 0; | |
534 | ||
535 | /* | |
536 | * Switch to wider bus (if supported). | |
537 | */ | |
303dbedc | 538 | if (card->host->caps & MMC_CAP_4_BIT_DATA) |
a303c531 | 539 | err = sdio_enable_4bit_bus(card); |
a303c531 PR |
540 | |
541 | /* Set the driver strength for the card */ | |
542 | sdio_select_driver_type(card); | |
543 | ||
544 | /* Set bus speed mode of the card */ | |
545 | err = sdio_set_bus_speed_mode(card); | |
546 | if (err) | |
547 | goto out; | |
548 | ||
810e08ee FS |
549 | /* |
550 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
551 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
552 | */ | |
63e415c6 AH |
553 | if (!mmc_host_is_spi(card->host) && |
554 | ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) || | |
555 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104))) | |
556 | err = mmc_execute_tuning(card); | |
a303c531 | 557 | out: |
a303c531 PR |
558 | return err; |
559 | } | |
560 | ||
17d33e14 NP |
561 | /* |
562 | * Handle the detection and initialisation of a card. | |
563 | * | |
564 | * In the case of a resume, "oldcard" will contain the card | |
565 | * we're trying to reinitialise. | |
566 | */ | |
567 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 568 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
569 | { |
570 | struct mmc_card *card; | |
571 | int err; | |
0797e5f1 | 572 | int retries = 10; |
db4a0d05 | 573 | u32 rocr = 0; |
69041150 | 574 | u32 ocr_card = ocr; |
17d33e14 NP |
575 | |
576 | BUG_ON(!host); | |
577 | WARN_ON(!host->claimed); | |
578 | ||
db4a0d05 UH |
579 | /* to query card if 1.8V signalling is supported */ |
580 | if (mmc_host_uhs(host)) | |
581 | ocr |= R4_18V_PRESENT; | |
582 | ||
0797e5f1 JR |
583 | try_again: |
584 | if (!retries) { | |
6606110d | 585 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 586 | ocr &= ~R4_18V_PRESENT; |
0797e5f1 JR |
587 | } |
588 | ||
17d33e14 NP |
589 | /* |
590 | * Inform the card of the voltage | |
591 | */ | |
3bca4cf7 | 592 | if (!powered_resume) { |
db4a0d05 | 593 | err = mmc_send_io_op_cond(host, ocr, &rocr); |
3bca4cf7 CB |
594 | if (err) |
595 | goto err; | |
596 | } | |
17d33e14 NP |
597 | |
598 | /* | |
599 | * For SPI, enable CRC as appropriate. | |
600 | */ | |
601 | if (mmc_host_is_spi(host)) { | |
602 | err = mmc_spi_set_crc(host, use_spi_crc); | |
603 | if (err) | |
604 | goto err; | |
605 | } | |
606 | ||
607 | /* | |
608 | * Allocate card structure. | |
609 | */ | |
610 | card = mmc_alloc_card(host, NULL); | |
611 | if (IS_ERR(card)) { | |
612 | err = PTR_ERR(card); | |
613 | goto err; | |
614 | } | |
615 | ||
db4a0d05 UH |
616 | if ((rocr & R4_MEMORY_PRESENT) && |
617 | mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) { | |
7310ece8 MM |
618 | card->type = MMC_TYPE_SD_COMBO; |
619 | ||
620 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
621 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
622 | mmc_remove_card(card); | |
623 | return -ENOENT; | |
624 | } | |
625 | } else { | |
626 | card->type = MMC_TYPE_SDIO; | |
627 | ||
628 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
629 | mmc_remove_card(card); | |
630 | return -ENOENT; | |
631 | } | |
632 | } | |
17d33e14 | 633 | |
3fcb027d DM |
634 | /* |
635 | * Call the optional HC's init_card function to handle quirks. | |
636 | */ | |
637 | if (host->ops->init_card) | |
638 | host->ops->init_card(host, card); | |
639 | ||
a303c531 PR |
640 | /* |
641 | * If the host and card support UHS-I mode request the card | |
642 | * to switch to 1.8V signaling level. No 1.8v signalling if | |
7122bbb0 | 643 | * UHS mode is not enabled to maintain compatibility and some |
a303c531 PR |
644 | * systems that claim 1.8v signalling in fact do not support |
645 | * it. | |
646 | */ | |
db4a0d05 | 647 | if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) { |
0f791fda | 648 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
db4a0d05 | 649 | ocr); |
0797e5f1 JR |
650 | if (err == -EAGAIN) { |
651 | sdio_reset(host); | |
652 | mmc_go_idle(host); | |
653 | mmc_send_if_cond(host, host->ocr_avail); | |
654 | mmc_remove_card(card); | |
655 | retries--; | |
656 | goto try_again; | |
657 | } else if (err) { | |
a303c531 | 658 | ocr &= ~R4_18V_PRESENT; |
a303c531 PR |
659 | } |
660 | err = 0; | |
661 | } else { | |
662 | ocr &= ~R4_18V_PRESENT; | |
a303c531 PR |
663 | } |
664 | ||
17d33e14 NP |
665 | /* |
666 | * For native busses: set card RCA and quit open drain mode. | |
667 | */ | |
3bca4cf7 | 668 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
669 | err = mmc_send_relative_addr(host, &card->rca); |
670 | if (err) | |
671 | goto remove; | |
672 | ||
0aab3995 SNX |
673 | /* |
674 | * Update oldcard with the new RCA received from the SDIO | |
675 | * device -- we're doing this so that it's updated in the | |
676 | * "card" struct when oldcard overwrites that later. | |
677 | */ | |
678 | if (oldcard) | |
679 | oldcard->rca = card->rca; | |
17d33e14 NP |
680 | } |
681 | ||
7310ece8 MM |
682 | /* |
683 | * Read CSD, before selecting the card | |
684 | */ | |
685 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
686 | err = mmc_sd_get_csd(host, card); | |
687 | if (err) | |
688 | return err; | |
689 | ||
690 | mmc_decode_cid(card); | |
691 | } | |
692 | ||
17d33e14 NP |
693 | /* |
694 | * Select card, as all following commands rely on that. | |
695 | */ | |
3bca4cf7 | 696 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
697 | err = mmc_select_card(card); |
698 | if (err) | |
699 | goto remove; | |
700 | } | |
701 | ||
6f51be3d GI |
702 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
703 | /* | |
704 | * This is non-standard SDIO device, meaning it doesn't | |
705 | * have any CIA (Common I/O area) registers present. | |
706 | * It's host's responsibility to fill cccr and cis | |
707 | * structures in init_card(). | |
708 | */ | |
709 | mmc_set_clock(host, card->cis.max_dtr); | |
710 | ||
711 | if (card->cccr.high_speed) { | |
6f51be3d GI |
712 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
713 | } | |
714 | ||
715 | goto finish; | |
716 | } | |
717 | ||
17d33e14 NP |
718 | /* |
719 | * Read the common registers. | |
720 | */ | |
2d0d68f5 | 721 | err = sdio_read_cccr(card, ocr); |
17d33e14 NP |
722 | if (err) |
723 | goto remove; | |
724 | ||
725 | /* | |
726 | * Read the common CIS tuples. | |
727 | */ | |
728 | err = sdio_read_common_cis(card); | |
729 | if (err) | |
730 | goto remove; | |
731 | ||
732 | if (oldcard) { | |
733 | int same = (card->cis.vendor == oldcard->cis.vendor && | |
734 | card->cis.device == oldcard->cis.device); | |
735 | mmc_remove_card(card); | |
7310ece8 MM |
736 | if (!same) |
737 | return -ENOENT; | |
738 | ||
17d33e14 NP |
739 | card = oldcard; |
740 | } | |
69041150 | 741 | card->ocr = ocr_card; |
32780cd1 | 742 | mmc_fixup_device(card, NULL); |
17d33e14 | 743 | |
7310ece8 MM |
744 | if (card->type == MMC_TYPE_SD_COMBO) { |
745 | err = mmc_sd_setup_card(host, card, oldcard != NULL); | |
746 | /* handle as SDIO-only card if memory init failed */ | |
747 | if (err) { | |
748 | mmc_go_idle(host); | |
749 | if (mmc_host_is_spi(host)) | |
750 | /* should not fail, as it worked previously */ | |
751 | mmc_spi_set_crc(host, use_spi_crc); | |
752 | card->type = MMC_TYPE_SDIO; | |
753 | } else | |
754 | card->dev.type = &sd_type; | |
755 | } | |
756 | ||
757 | /* | |
758 | * If needed, disconnect card detection pull-up resistor. | |
759 | */ | |
760 | err = sdio_disable_cd(card); | |
761 | if (err) | |
762 | goto remove; | |
763 | ||
a303c531 PR |
764 | /* Initialization sequence for UHS-I cards */ |
765 | /* Only if card supports 1.8v and UHS signaling */ | |
766 | if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) { | |
767 | err = mmc_sdio_init_uhs_card(card); | |
768 | if (err) | |
769 | goto remove; | |
a303c531 PR |
770 | } else { |
771 | /* | |
772 | * Switch to high-speed (if supported). | |
773 | */ | |
774 | err = sdio_enable_hs(card); | |
775 | if (err > 0) | |
cdc99179 | 776 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
a303c531 PR |
777 | else if (err) |
778 | goto remove; | |
17d33e14 | 779 | |
a303c531 PR |
780 | /* |
781 | * Change to the card's maximum speed. | |
782 | */ | |
783 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); | |
17d33e14 | 784 | |
a303c531 PR |
785 | /* |
786 | * Switch to wider bus (if supported). | |
787 | */ | |
788 | err = sdio_enable_4bit_bus(card); | |
303dbedc | 789 | if (err) |
a303c531 PR |
790 | goto remove; |
791 | } | |
6f51be3d | 792 | finish: |
17d33e14 NP |
793 | if (!oldcard) |
794 | host->card = card; | |
795 | return 0; | |
796 | ||
797 | remove: | |
798 | if (!oldcard) | |
799 | mmc_remove_card(card); | |
800 | ||
801 | err: | |
802 | return err; | |
803 | } | |
804 | ||
5c4e6f13 PO |
805 | /* |
806 | * Host is being removed. Free up the current card. | |
807 | */ | |
808 | static void mmc_sdio_remove(struct mmc_host *host) | |
809 | { | |
e29a7d73 PO |
810 | int i; |
811 | ||
5c4e6f13 PO |
812 | BUG_ON(!host); |
813 | BUG_ON(!host->card); | |
814 | ||
e29a7d73 PO |
815 | for (i = 0;i < host->card->sdio_funcs;i++) { |
816 | if (host->card->sdio_func[i]) { | |
817 | sdio_remove_func(host->card->sdio_func[i]); | |
818 | host->card->sdio_func[i] = NULL; | |
819 | } | |
820 | } | |
821 | ||
5c4e6f13 PO |
822 | mmc_remove_card(host->card); |
823 | host->card = NULL; | |
824 | } | |
825 | ||
d3049504 AH |
826 | /* |
827 | * Card detection - card is alive. | |
828 | */ | |
829 | static int mmc_sdio_alive(struct mmc_host *host) | |
830 | { | |
831 | return mmc_select_card(host->card); | |
832 | } | |
833 | ||
5c4e6f13 PO |
834 | /* |
835 | * Card detection callback from host. | |
836 | */ | |
837 | static void mmc_sdio_detect(struct mmc_host *host) | |
838 | { | |
839 | int err; | |
840 | ||
841 | BUG_ON(!host); | |
842 | BUG_ON(!host->card); | |
843 | ||
87973ba2 | 844 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
845 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
846 | err = pm_runtime_get_sync(&host->card->dev); | |
3bffb800 LF |
847 | if (err < 0) { |
848 | pm_runtime_put_noidle(&host->card->dev); | |
ed919b01 | 849 | goto out; |
3bffb800 | 850 | } |
ed919b01 | 851 | } |
87973ba2 | 852 | |
5c4e6f13 PO |
853 | mmc_claim_host(host); |
854 | ||
855 | /* | |
856 | * Just check if our card has been removed. | |
857 | */ | |
d3049504 | 858 | err = _mmc_detect_card_removed(host); |
5c4e6f13 PO |
859 | |
860 | mmc_release_host(host); | |
861 | ||
4d0812c3 OBC |
862 | /* |
863 | * Tell PM core it's OK to power off the card now. | |
864 | * | |
865 | * The _sync variant is used in order to ensure that the card | |
866 | * is left powered off in case an error occurred, and the card | |
867 | * is going to be removed. | |
868 | * | |
869 | * Since there is no specific reason to believe a new user | |
870 | * is about to show up at this point, the _sync variant is | |
871 | * desirable anyway. | |
872 | */ | |
ed919b01 OBC |
873 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
874 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 875 | |
87973ba2 | 876 | out: |
5c4e6f13 PO |
877 | if (err) { |
878 | mmc_sdio_remove(host); | |
879 | ||
880 | mmc_claim_host(host); | |
881 | mmc_detach_bus(host); | |
7f7e4129 | 882 | mmc_power_off(host); |
5c4e6f13 PO |
883 | mmc_release_host(host); |
884 | } | |
885 | } | |
886 | ||
17d33e14 | 887 | /* |
810caddb | 888 | * SDIO pre_suspend. We need to suspend all functions separately. |
17d33e14 NP |
889 | * Therefore all registered functions must have drivers with suspend |
890 | * and resume methods. Failing that we simply remove the whole card. | |
891 | */ | |
810caddb | 892 | static int mmc_sdio_pre_suspend(struct mmc_host *host) |
17d33e14 | 893 | { |
95cdfb72 | 894 | int i, err = 0; |
17d33e14 | 895 | |
17d33e14 NP |
896 | for (i = 0; i < host->card->sdio_funcs; i++) { |
897 | struct sdio_func *func = host->card->sdio_func[i]; | |
898 | if (func && sdio_func_present(func) && func->dev.driver) { | |
899 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
900 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
901 | /* force removal of entire card in that case */ |
902 | err = -ENOSYS; | |
810caddb UH |
903 | break; |
904 | } | |
905 | } | |
906 | } | |
907 | ||
908 | return err; | |
909 | } | |
910 | ||
911 | /* | |
912 | * SDIO suspend. Suspend all functions separately. | |
913 | */ | |
914 | static int mmc_sdio_suspend(struct mmc_host *host) | |
915 | { | |
573185cc | 916 | if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
6b5eda36 DD |
917 | mmc_claim_host(host); |
918 | sdio_disable_wide(host->card); | |
919 | mmc_release_host(host); | |
920 | } | |
921 | ||
79d5a65a | 922 | if (!mmc_card_keep_power(host)) { |
74590263 | 923 | mmc_power_off(host); |
79d5a65a AH |
924 | } else if (host->retune_period) { |
925 | mmc_retune_timer_stop(host); | |
926 | mmc_retune_needed(host); | |
927 | } | |
74590263 | 928 | |
573185cc | 929 | return 0; |
17d33e14 NP |
930 | } |
931 | ||
95cdfb72 | 932 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 933 | { |
573185cc | 934 | int err = 0; |
17d33e14 NP |
935 | |
936 | BUG_ON(!host); | |
937 | BUG_ON(!host->card); | |
938 | ||
95cdfb72 | 939 | /* Basic card reinitialization. */ |
17d33e14 | 940 | mmc_claim_host(host); |
080bc977 | 941 | |
74590263 UH |
942 | /* Restore power if needed */ |
943 | if (!mmc_card_keep_power(host)) { | |
69041150 | 944 | mmc_power_up(host, host->card->ocr); |
74590263 UH |
945 | /* |
946 | * Tell runtime PM core we just powered up the card, | |
947 | * since it still believes the card is powered off. | |
948 | * Note that currently runtime PM is only enabled | |
949 | * for SDIO cards that are MMC_CAP_POWER_OFF_CARD | |
950 | */ | |
951 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { | |
952 | pm_runtime_disable(&host->card->dev); | |
953 | pm_runtime_set_active(&host->card->dev); | |
954 | pm_runtime_enable(&host->card->dev); | |
955 | } | |
956 | } | |
957 | ||
080bc977 | 958 | /* No need to reinitialize powered-resumed nonremovable cards */ |
51aa66a5 SJ |
959 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
960 | sdio_reset(host); | |
961 | mmc_go_idle(host); | |
006fc51c N |
962 | mmc_send_if_cond(host, host->card->ocr); |
963 | err = mmc_send_io_op_cond(host, 0, NULL); | |
964 | if (!err) | |
965 | err = mmc_sdio_init_card(host, host->card->ocr, | |
966 | host->card, | |
967 | mmc_card_keep_power(host)); | |
51aa66a5 | 968 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
080bc977 OBC |
969 | /* We may have switched to 1-bit mode during suspend */ |
970 | err = sdio_enable_4bit_bus(host->card); | |
080bc977 OBC |
971 | } |
972 | ||
dea67c4e FZ |
973 | if (!err && host->sdio_irqs) { |
974 | if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) { | |
975 | wake_up_process(host->sdio_irq_thread); | |
976 | } else if (host->caps & MMC_CAP_SDIO_IRQ) { | |
977 | mmc_host_clk_hold(host); | |
978 | host->ops->enable_sdio_irq(host, 1); | |
979 | mmc_host_clk_release(host); | |
980 | } | |
981 | } | |
982 | ||
17d33e14 | 983 | mmc_release_host(host); |
17d33e14 | 984 | |
74590263 | 985 | host->pm_flags &= ~MMC_PM_KEEP_POWER; |
95cdfb72 | 986 | return err; |
17d33e14 | 987 | } |
5c4e6f13 | 988 | |
d3fe37b1 OBC |
989 | static int mmc_sdio_power_restore(struct mmc_host *host) |
990 | { | |
991 | int ret; | |
992 | ||
993 | BUG_ON(!host); | |
994 | BUG_ON(!host->card); | |
995 | ||
996 | mmc_claim_host(host); | |
c6e633ad DD |
997 | |
998 | /* | |
999 | * Reset the card by performing the same steps that are taken by | |
1000 | * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe. | |
1001 | * | |
1002 | * sdio_reset() is technically not needed. Having just powered up the | |
1003 | * hardware, it should already be in reset state. However, some | |
1004 | * platforms (such as SD8686 on OLPC) do not instantly cut power, | |
1005 | * meaning that a reset is required when restoring power soon after | |
1006 | * powering off. It is harmless in other cases. | |
1007 | * | |
1008 | * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec, | |
1009 | * is not necessary for non-removable cards. However, it is required | |
1010 | * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and | |
1011 | * harmless in other situations. | |
1012 | * | |
c6e633ad | 1013 | */ |
e7747475 | 1014 | |
c6e633ad DD |
1015 | sdio_reset(host); |
1016 | mmc_go_idle(host); | |
59b6c9e0 | 1017 | mmc_send_if_cond(host, host->card->ocr); |
c6e633ad | 1018 | |
ce69d37b | 1019 | ret = mmc_send_io_op_cond(host, 0, NULL); |
c6e633ad DD |
1020 | if (ret) |
1021 | goto out; | |
1022 | ||
ce69d37b | 1023 | ret = mmc_sdio_init_card(host, host->card->ocr, host->card, |
a5e9425d | 1024 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
1025 | if (!ret && host->sdio_irqs) |
1026 | mmc_signal_sdio_irq(host); | |
c6e633ad DD |
1027 | |
1028 | out: | |
d3fe37b1 OBC |
1029 | mmc_release_host(host); |
1030 | ||
1031 | return ret; | |
1032 | } | |
1033 | ||
12d01d0b UH |
1034 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
1035 | { | |
1036 | /* No references to the card, cut the power to it. */ | |
1037 | mmc_power_off(host); | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | static int mmc_sdio_runtime_resume(struct mmc_host *host) | |
1042 | { | |
1043 | /* Restore power and re-initialize. */ | |
69041150 | 1044 | mmc_power_up(host, host->card->ocr); |
12d01d0b UH |
1045 | return mmc_sdio_power_restore(host); |
1046 | } | |
1047 | ||
1fb654fd AF |
1048 | static int mmc_sdio_reset(struct mmc_host *host) |
1049 | { | |
1050 | mmc_power_cycle(host, host->card->ocr); | |
1051 | return mmc_sdio_power_restore(host); | |
1052 | } | |
1053 | ||
5c4e6f13 PO |
1054 | static const struct mmc_bus_ops mmc_sdio_ops = { |
1055 | .remove = mmc_sdio_remove, | |
1056 | .detect = mmc_sdio_detect, | |
810caddb | 1057 | .pre_suspend = mmc_sdio_pre_suspend, |
17d33e14 NP |
1058 | .suspend = mmc_sdio_suspend, |
1059 | .resume = mmc_sdio_resume, | |
12d01d0b UH |
1060 | .runtime_suspend = mmc_sdio_runtime_suspend, |
1061 | .runtime_resume = mmc_sdio_runtime_resume, | |
d3fe37b1 | 1062 | .power_restore = mmc_sdio_power_restore, |
d3049504 | 1063 | .alive = mmc_sdio_alive, |
1fb654fd | 1064 | .reset = mmc_sdio_reset, |
5c4e6f13 PO |
1065 | }; |
1066 | ||
1067 | ||
1068 | /* | |
1069 | * Starting point for SDIO card init. | |
1070 | */ | |
807e8e40 | 1071 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 1072 | { |
807e8e40 | 1073 | int err, i, funcs; |
69041150 | 1074 | u32 ocr, rocr; |
5c4e6f13 PO |
1075 | struct mmc_card *card; |
1076 | ||
1077 | BUG_ON(!host); | |
d84075c8 | 1078 | WARN_ON(!host->claimed); |
5c4e6f13 | 1079 | |
807e8e40 AR |
1080 | err = mmc_send_io_op_cond(host, 0, &ocr); |
1081 | if (err) | |
1082 | return err; | |
1083 | ||
5c4e6f13 | 1084 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
1085 | if (host->ocr_avail_sdio) |
1086 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 | 1087 | |
5c4e6f13 | 1088 | |
69041150 | 1089 | rocr = mmc_select_voltage(host, ocr); |
5c4e6f13 PO |
1090 | |
1091 | /* | |
1092 | * Can we support the voltage(s) of the card(s)? | |
1093 | */ | |
69041150 | 1094 | if (!rocr) { |
5c4e6f13 PO |
1095 | err = -EINVAL; |
1096 | goto err; | |
1097 | } | |
1098 | ||
1099 | /* | |
17d33e14 | 1100 | * Detect and init the card. |
5c4e6f13 | 1101 | */ |
69041150 | 1102 | err = mmc_sdio_init_card(host, rocr, NULL, 0); |
ec2ed700 UH |
1103 | if (err) |
1104 | goto err; | |
1105 | ||
17d33e14 | 1106 | card = host->card; |
af517150 | 1107 | |
81968561 | 1108 | /* |
ed919b01 | 1109 | * Enable runtime PM only if supported by host+card+board |
81968561 | 1110 | */ |
ed919b01 OBC |
1111 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
1112 | /* | |
1113 | * Let runtime PM core know our card is active | |
1114 | */ | |
1115 | err = pm_runtime_set_active(&card->dev); | |
1116 | if (err) | |
1117 | goto remove; | |
81968561 | 1118 | |
ed919b01 OBC |
1119 | /* |
1120 | * Enable runtime PM for this card | |
1121 | */ | |
1122 | pm_runtime_enable(&card->dev); | |
1123 | } | |
81968561 | 1124 | |
5c4e6f13 PO |
1125 | /* |
1126 | * The number of functions on the card is encoded inside | |
1127 | * the ocr. | |
1128 | */ | |
e8812793 MF |
1129 | funcs = (ocr & 0x70000000) >> 28; |
1130 | card->sdio_funcs = 0; | |
4ff6471c | 1131 | |
e29a7d73 PO |
1132 | /* |
1133 | * Initialize (but don't add) all present functions. | |
1134 | */ | |
e8812793 | 1135 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
1136 | err = sdio_init_func(host->card, i + 1); |
1137 | if (err) | |
1138 | goto remove; | |
40bba0c1 OBC |
1139 | |
1140 | /* | |
ed919b01 | 1141 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 1142 | */ |
ed919b01 OBC |
1143 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1144 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 1145 | } |
5c4e6f13 | 1146 | |
e29a7d73 PO |
1147 | /* |
1148 | * First add the card to the driver model... | |
1149 | */ | |
807e8e40 | 1150 | mmc_release_host(host); |
5c4e6f13 PO |
1151 | err = mmc_add_card(host->card); |
1152 | if (err) | |
e29a7d73 PO |
1153 | goto remove_added; |
1154 | ||
1155 | /* | |
1156 | * ...then the SDIO functions. | |
1157 | */ | |
1158 | for (i = 0;i < funcs;i++) { | |
1159 | err = sdio_add_func(host->card->sdio_func[i]); | |
1160 | if (err) | |
1161 | goto remove_added; | |
1162 | } | |
5c4e6f13 | 1163 | |
34497913 | 1164 | mmc_claim_host(host); |
5c4e6f13 PO |
1165 | return 0; |
1166 | ||
e29a7d73 PO |
1167 | |
1168 | remove_added: | |
1169 | /* Remove without lock if the device has been added. */ | |
1170 | mmc_sdio_remove(host); | |
5c4e6f13 | 1171 | mmc_claim_host(host); |
e29a7d73 PO |
1172 | remove: |
1173 | /* And with lock if it hasn't been added. */ | |
807e8e40 | 1174 | mmc_release_host(host); |
e29a7d73 PO |
1175 | if (host->card) |
1176 | mmc_sdio_remove(host); | |
807e8e40 | 1177 | mmc_claim_host(host); |
5c4e6f13 PO |
1178 | err: |
1179 | mmc_detach_bus(host); | |
5c4e6f13 | 1180 | |
a3c76eb9 | 1181 | pr_err("%s: error %d whilst initialising SDIO card\n", |
5c4e6f13 PO |
1182 | mmc_hostname(host), err); |
1183 | ||
1184 | return err; | |
1185 | } | |
1186 |