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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> | |
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" | |
4facdde1 | 23 | #include "card.h" |
5857b29b | 24 | #include "host.h" |
5c4e6f13 | 25 | #include "bus.h" |
28fc64af | 26 | #include "quirks.h" |
71578a1e | 27 | #include "sd.h" |
e29a7d73 | 28 | #include "sdio_bus.h" |
5c4e6f13 PO |
29 | #include "mmc_ops.h" |
30 | #include "sd_ops.h" | |
31 | #include "sdio_ops.h" | |
b7261261 | 32 | #include "sdio_cis.h" |
5c4e6f13 | 33 | |
0597007f PO |
34 | static int sdio_read_fbr(struct sdio_func *func) |
35 | { | |
36 | int ret; | |
37 | unsigned char data; | |
38 | ||
eab40687 OBC |
39 | if (mmc_card_nonstd_func_interface(func->card)) { |
40 | func->class = SDIO_CLASS_NONE; | |
41 | return 0; | |
42 | } | |
43 | ||
0597007f | 44 | ret = mmc_io_rw_direct(func->card, 0, 0, |
7616ee95 | 45 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data); |
0597007f PO |
46 | if (ret) |
47 | goto out; | |
48 | ||
49 | data &= 0x0f; | |
50 | ||
51 | if (data == 0x0f) { | |
52 | ret = mmc_io_rw_direct(func->card, 0, 0, | |
7616ee95 | 53 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data); |
0597007f PO |
54 | if (ret) |
55 | goto out; | |
56 | } | |
57 | ||
58 | func->class = data; | |
59 | ||
60 | out: | |
61 | return ret; | |
62 | } | |
63 | ||
e29a7d73 PO |
64 | static int sdio_init_func(struct mmc_card *card, unsigned int fn) |
65 | { | |
0597007f | 66 | int ret; |
e29a7d73 PO |
67 | struct sdio_func *func; |
68 | ||
5df0e823 SL |
69 | if (WARN_ON(fn > SDIO_MAX_FUNCS)) |
70 | return -EINVAL; | |
e29a7d73 PO |
71 | |
72 | func = sdio_alloc_func(card); | |
73 | if (IS_ERR(func)) | |
74 | return PTR_ERR(func); | |
75 | ||
76 | func->num = fn; | |
77 | ||
6f51be3d GI |
78 | if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) { |
79 | ret = sdio_read_fbr(func); | |
80 | if (ret) | |
81 | goto fail; | |
0597007f | 82 | |
6f51be3d GI |
83 | ret = sdio_read_func_cis(func); |
84 | if (ret) | |
85 | goto fail; | |
86 | } else { | |
87 | func->vendor = func->card->cis.vendor; | |
88 | func->device = func->card->cis.device; | |
89 | func->max_blksize = func->card->cis.blksize; | |
90 | } | |
b7261261 | 91 | |
e29a7d73 PO |
92 | card->sdio_func[fn - 1] = func; |
93 | ||
94 | return 0; | |
0597007f PO |
95 | |
96 | fail: | |
97 | /* | |
98 | * It is okay to remove the function here even though we hold | |
99 | * the host lock as we haven't registered the device yet. | |
100 | */ | |
101 | sdio_remove_func(func); | |
102 | return ret; | |
e29a7d73 PO |
103 | } |
104 | ||
2d0d68f5 | 105 | static int sdio_read_cccr(struct mmc_card *card, u32 ocr) |
35c66c19 PO |
106 | { |
107 | int ret; | |
108 | int cccr_vsn; | |
2d0d68f5 | 109 | int uhs = ocr & R4_18V_PRESENT; |
35c66c19 | 110 | unsigned char data; |
a303c531 | 111 | unsigned char speed; |
35c66c19 | 112 | |
35c66c19 PO |
113 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); |
114 | if (ret) | |
115 | goto out; | |
116 | ||
117 | cccr_vsn = data & 0x0f; | |
118 | ||
b4625dab | 119 | if (cccr_vsn > SDIO_CCCR_REV_3_00) { |
a3c76eb9 | 120 | pr_err("%s: unrecognised CCCR structure version %d\n", |
35c66c19 PO |
121 | mmc_hostname(card->host), cccr_vsn); |
122 | return -EINVAL; | |
123 | } | |
124 | ||
125 | card->cccr.sdio_vsn = (data & 0xf0) >> 4; | |
126 | ||
127 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); | |
128 | if (ret) | |
129 | goto out; | |
130 | ||
131 | if (data & SDIO_CCCR_CAP_SMB) | |
132 | card->cccr.multi_block = 1; | |
133 | if (data & SDIO_CCCR_CAP_LSC) | |
134 | card->cccr.low_speed = 1; | |
135 | if (data & SDIO_CCCR_CAP_4BLS) | |
136 | card->cccr.wide_bus = 1; | |
137 | ||
138 | if (cccr_vsn >= SDIO_CCCR_REV_1_10) { | |
139 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); | |
140 | if (ret) | |
141 | goto out; | |
142 | ||
143 | if (data & SDIO_POWER_SMPC) | |
144 | card->cccr.high_power = 1; | |
145 | } | |
146 | ||
147 | if (cccr_vsn >= SDIO_CCCR_REV_1_20) { | |
a303c531 | 148 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); |
35c66c19 PO |
149 | if (ret) |
150 | goto out; | |
151 | ||
a303c531 PR |
152 | card->scr.sda_spec3 = 0; |
153 | card->sw_caps.sd3_bus_mode = 0; | |
154 | card->sw_caps.sd3_drv_type = 0; | |
2d0d68f5 | 155 | if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) { |
a303c531 PR |
156 | card->scr.sda_spec3 = 1; |
157 | ret = mmc_io_rw_direct(card, 0, 0, | |
158 | SDIO_CCCR_UHS, 0, &data); | |
159 | if (ret) | |
160 | goto out; | |
161 | ||
41875e38 | 162 | if (mmc_host_uhs(card->host)) { |
a303c531 PR |
163 | if (data & SDIO_UHS_DDR50) |
164 | card->sw_caps.sd3_bus_mode | |
165 | |= SD_MODE_UHS_DDR50; | |
166 | ||
167 | if (data & SDIO_UHS_SDR50) | |
168 | card->sw_caps.sd3_bus_mode | |
169 | |= SD_MODE_UHS_SDR50; | |
170 | ||
171 | if (data & SDIO_UHS_SDR104) | |
172 | card->sw_caps.sd3_bus_mode | |
173 | |= SD_MODE_UHS_SDR104; | |
174 | } | |
175 | ||
176 | ret = mmc_io_rw_direct(card, 0, 0, | |
177 | SDIO_CCCR_DRIVE_STRENGTH, 0, &data); | |
178 | if (ret) | |
179 | goto out; | |
180 | ||
181 | if (data & SDIO_DRIVE_SDTA) | |
182 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A; | |
183 | if (data & SDIO_DRIVE_SDTC) | |
184 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C; | |
185 | if (data & SDIO_DRIVE_SDTD) | |
186 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D; | |
187 | } | |
188 | ||
189 | /* if no uhs mode ensure we check for high speed */ | |
190 | if (!card->sw_caps.sd3_bus_mode) { | |
191 | if (speed & SDIO_SPEED_SHS) { | |
192 | card->cccr.high_speed = 1; | |
193 | card->sw_caps.hs_max_dtr = 50000000; | |
194 | } else { | |
195 | card->cccr.high_speed = 0; | |
196 | card->sw_caps.hs_max_dtr = 25000000; | |
197 | } | |
198 | } | |
35c66c19 PO |
199 | } |
200 | ||
201 | out: | |
202 | return ret; | |
203 | } | |
204 | ||
4ff6471c PO |
205 | static int sdio_enable_wide(struct mmc_card *card) |
206 | { | |
207 | int ret; | |
208 | u8 ctrl; | |
209 | ||
210 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
211 | return 0; | |
212 | ||
213 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
214 | return 0; | |
215 | ||
216 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
217 | if (ret) | |
218 | return ret; | |
219 | ||
2a0fe914 | 220 | if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED) |
6606110d JP |
221 | pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n", |
222 | mmc_hostname(card->host), ctrl); | |
2a0fe914 YD |
223 | |
224 | /* set as 4-bit bus width */ | |
225 | ctrl &= ~SDIO_BUS_WIDTH_MASK; | |
4ff6471c PO |
226 | ctrl |= SDIO_BUS_WIDTH_4BIT; |
227 | ||
228 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
229 | if (ret) | |
230 | return ret; | |
231 | ||
7310ece8 | 232 | return 1; |
4ff6471c PO |
233 | } |
234 | ||
006ebd5d OBC |
235 | /* |
236 | * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1) | |
237 | * of the card. This may be required on certain setups of boards, | |
238 | * controllers and embedded sdio device which do not need the card's | |
239 | * pull-up. As a result, card detection is disabled and power is saved. | |
240 | */ | |
241 | static int sdio_disable_cd(struct mmc_card *card) | |
242 | { | |
243 | int ret; | |
244 | u8 ctrl; | |
245 | ||
2059a02d | 246 | if (!mmc_card_disable_cd(card)) |
006ebd5d OBC |
247 | return 0; |
248 | ||
249 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
250 | if (ret) | |
251 | return ret; | |
252 | ||
253 | ctrl |= SDIO_BUS_CD_DISABLE; | |
254 | ||
255 | return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
256 | } | |
257 | ||
6b5eda36 DD |
258 | /* |
259 | * Devices that remain active during a system suspend are | |
260 | * put back into 1-bit mode. | |
261 | */ | |
262 | static int sdio_disable_wide(struct mmc_card *card) | |
263 | { | |
264 | int ret; | |
265 | u8 ctrl; | |
266 | ||
267 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
268 | return 0; | |
269 | ||
270 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
271 | return 0; | |
272 | ||
273 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
274 | if (ret) | |
275 | return ret; | |
276 | ||
277 | if (!(ctrl & SDIO_BUS_WIDTH_4BIT)) | |
278 | return 0; | |
279 | ||
280 | ctrl &= ~SDIO_BUS_WIDTH_4BIT; | |
281 | ctrl |= SDIO_BUS_ASYNC_INT; | |
282 | ||
283 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
284 | if (ret) | |
285 | return ret; | |
286 | ||
287 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1); | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
7310ece8 MM |
292 | |
293 | static int sdio_enable_4bit_bus(struct mmc_card *card) | |
294 | { | |
295 | int err; | |
296 | ||
297 | if (card->type == MMC_TYPE_SDIO) | |
303dbedc N |
298 | err = sdio_enable_wide(card); |
299 | else if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
300 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
7310ece8 MM |
301 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
302 | if (err) | |
303 | return err; | |
303dbedc N |
304 | err = sdio_enable_wide(card); |
305 | if (err <= 0) | |
306 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); | |
7310ece8 MM |
307 | } else |
308 | return 0; | |
309 | ||
303dbedc N |
310 | if (err > 0) { |
311 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
312 | err = 0; | |
313 | } | |
7310ece8 MM |
314 | |
315 | return err; | |
316 | } | |
317 | ||
318 | ||
d16f5770 PO |
319 | /* |
320 | * Test if the card supports high-speed mode and, if so, switch to it. | |
321 | */ | |
7310ece8 | 322 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
d16f5770 PO |
323 | { |
324 | int ret; | |
325 | u8 speed; | |
326 | ||
327 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) | |
328 | return 0; | |
329 | ||
330 | if (!card->cccr.high_speed) | |
331 | return 0; | |
332 | ||
333 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
334 | if (ret) | |
335 | return ret; | |
336 | ||
7310ece8 MM |
337 | if (enable) |
338 | speed |= SDIO_SPEED_EHS; | |
339 | else | |
340 | speed &= ~SDIO_SPEED_EHS; | |
d16f5770 PO |
341 | |
342 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
343 | if (ret) | |
344 | return ret; | |
345 | ||
71578a1e MM |
346 | return 1; |
347 | } | |
d16f5770 | 348 | |
7310ece8 MM |
349 | /* |
350 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. | |
351 | */ | |
352 | static int sdio_enable_hs(struct mmc_card *card) | |
353 | { | |
354 | int ret; | |
355 | ||
356 | ret = mmc_sdio_switch_hs(card, true); | |
357 | if (ret <= 0 || card->type == MMC_TYPE_SDIO) | |
358 | return ret; | |
359 | ||
360 | ret = mmc_sd_switch_hs(card); | |
361 | if (ret <= 0) | |
362 | mmc_sdio_switch_hs(card, false); | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
71578a1e MM |
367 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
368 | { | |
369 | unsigned max_dtr; | |
370 | ||
cdc99179 | 371 | if (mmc_card_hs(card)) { |
71578a1e MM |
372 | /* |
373 | * The SDIO specification doesn't mention how | |
374 | * the CIS transfer speed register relates to | |
375 | * high-speed, but it seems that 50 MHz is | |
376 | * mandatory. | |
377 | */ | |
378 | max_dtr = 50000000; | |
379 | } else { | |
380 | max_dtr = card->cis.max_dtr; | |
381 | } | |
382 | ||
7310ece8 MM |
383 | if (card->type == MMC_TYPE_SD_COMBO) |
384 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); | |
385 | ||
71578a1e | 386 | return max_dtr; |
d16f5770 PO |
387 | } |
388 | ||
a303c531 PR |
389 | static unsigned char host_drive_to_sdio_drive(int host_strength) |
390 | { | |
391 | switch (host_strength) { | |
392 | case MMC_SET_DRIVER_TYPE_A: | |
393 | return SDIO_DTSx_SET_TYPE_A; | |
394 | case MMC_SET_DRIVER_TYPE_B: | |
395 | return SDIO_DTSx_SET_TYPE_B; | |
396 | case MMC_SET_DRIVER_TYPE_C: | |
397 | return SDIO_DTSx_SET_TYPE_C; | |
398 | case MMC_SET_DRIVER_TYPE_D: | |
399 | return SDIO_DTSx_SET_TYPE_D; | |
400 | default: | |
401 | return SDIO_DTSx_SET_TYPE_B; | |
402 | } | |
403 | } | |
404 | ||
405 | static void sdio_select_driver_type(struct mmc_card *card) | |
406 | { | |
fa021cef | 407 | int card_drv_type, drive_strength, drv_type; |
a303c531 PR |
408 | unsigned char card_strength; |
409 | int err; | |
410 | ||
3853a042 AH |
411 | card->drive_strength = 0; |
412 | ||
fa021cef | 413 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
a303c531 | 414 | |
e23350b3 AH |
415 | drive_strength = mmc_select_drive_strength(card, |
416 | card->sw_caps.uhs_max_dtr, | |
417 | card_drv_type, &drv_type); | |
a303c531 | 418 | |
b4f30a17 AH |
419 | if (drive_strength) { |
420 | /* if error just use default for drive strength B */ | |
421 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0, | |
422 | &card_strength); | |
423 | if (err) | |
424 | return; | |
a303c531 | 425 | |
b4f30a17 AH |
426 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); |
427 | card_strength |= host_drive_to_sdio_drive(drive_strength); | |
a303c531 | 428 | |
b4f30a17 AH |
429 | /* if error default to drive strength B */ |
430 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH, | |
431 | card_strength, NULL); | |
432 | if (err) | |
433 | return; | |
3853a042 | 434 | card->drive_strength = drive_strength; |
b4f30a17 | 435 | } |
a303c531 | 436 | |
b4f30a17 AH |
437 | if (drv_type) |
438 | mmc_set_driver_type(card->host, drv_type); | |
a303c531 PR |
439 | } |
440 | ||
441 | ||
442 | static int sdio_set_bus_speed_mode(struct mmc_card *card) | |
443 | { | |
444 | unsigned int bus_speed, timing; | |
445 | int err; | |
446 | unsigned char speed; | |
447 | ||
448 | /* | |
449 | * If the host doesn't support any of the UHS-I modes, fallback on | |
450 | * default speed. | |
451 | */ | |
41875e38 | 452 | if (!mmc_host_uhs(card->host)) |
a303c531 PR |
453 | return 0; |
454 | ||
455 | bus_speed = SDIO_SPEED_SDR12; | |
456 | timing = MMC_TIMING_UHS_SDR12; | |
457 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
458 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
459 | bus_speed = SDIO_SPEED_SDR104; | |
460 | timing = MMC_TIMING_UHS_SDR104; | |
461 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
77e2ff08 | 462 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
a303c531 PR |
463 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
464 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
465 | bus_speed = SDIO_SPEED_DDR50; | |
466 | timing = MMC_TIMING_UHS_DDR50; | |
467 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
77e2ff08 | 468 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
a303c531 PR |
469 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
470 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
471 | SD_MODE_UHS_SDR50)) { | |
472 | bus_speed = SDIO_SPEED_SDR50; | |
473 | timing = MMC_TIMING_UHS_SDR50; | |
474 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
77e2ff08 | 475 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
a303c531 PR |
476 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
477 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
478 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
479 | bus_speed = SDIO_SPEED_SDR25; | |
480 | timing = MMC_TIMING_UHS_SDR25; | |
481 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
77e2ff08 | 482 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
a303c531 PR |
483 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
484 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
485 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
486 | SD_MODE_UHS_SDR12)) { | |
487 | bus_speed = SDIO_SPEED_SDR12; | |
488 | timing = MMC_TIMING_UHS_SDR12; | |
489 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
77e2ff08 | 490 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
a303c531 PR |
491 | } |
492 | ||
493 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
494 | if (err) | |
495 | return err; | |
496 | ||
497 | speed &= ~SDIO_SPEED_BSS_MASK; | |
498 | speed |= bus_speed; | |
499 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
500 | if (err) | |
501 | return err; | |
502 | ||
503 | if (bus_speed) { | |
504 | mmc_set_timing(card->host, timing); | |
505 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
506 | } | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | /* | |
512 | * UHS-I specific initialization procedure | |
513 | */ | |
514 | static int mmc_sdio_init_uhs_card(struct mmc_card *card) | |
515 | { | |
516 | int err; | |
517 | ||
518 | if (!card->scr.sda_spec3) | |
519 | return 0; | |
520 | ||
521 | /* | |
522 | * Switch to wider bus (if supported). | |
523 | */ | |
303dbedc | 524 | if (card->host->caps & MMC_CAP_4_BIT_DATA) |
a303c531 | 525 | err = sdio_enable_4bit_bus(card); |
a303c531 PR |
526 | |
527 | /* Set the driver strength for the card */ | |
528 | sdio_select_driver_type(card); | |
529 | ||
530 | /* Set bus speed mode of the card */ | |
531 | err = sdio_set_bus_speed_mode(card); | |
532 | if (err) | |
533 | goto out; | |
534 | ||
810e08ee FS |
535 | /* |
536 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
537 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
538 | */ | |
63e415c6 | 539 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
540 | ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) || |
541 | (card->host->ios.timing == MMC_TIMING_UHS_SDR104))) | |
63e415c6 | 542 | err = mmc_execute_tuning(card); |
a303c531 | 543 | out: |
a303c531 PR |
544 | return err; |
545 | } | |
546 | ||
0eb51a58 SL |
547 | static void mmc_sdio_resend_if_cond(struct mmc_host *host, |
548 | struct mmc_card *card) | |
549 | { | |
550 | sdio_reset(host); | |
551 | mmc_go_idle(host); | |
552 | mmc_send_if_cond(host, host->ocr_avail); | |
553 | mmc_remove_card(card); | |
554 | } | |
555 | ||
17d33e14 NP |
556 | /* |
557 | * Handle the detection and initialisation of a card. | |
558 | * | |
559 | * In the case of a resume, "oldcard" will contain the card | |
560 | * we're trying to reinitialise. | |
561 | */ | |
562 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 563 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
564 | { |
565 | struct mmc_card *card; | |
566 | int err; | |
0797e5f1 | 567 | int retries = 10; |
db4a0d05 | 568 | u32 rocr = 0; |
69041150 | 569 | u32 ocr_card = ocr; |
17d33e14 | 570 | |
17d33e14 NP |
571 | WARN_ON(!host->claimed); |
572 | ||
db4a0d05 UH |
573 | /* to query card if 1.8V signalling is supported */ |
574 | if (mmc_host_uhs(host)) | |
575 | ocr |= R4_18V_PRESENT; | |
576 | ||
0797e5f1 JR |
577 | try_again: |
578 | if (!retries) { | |
6606110d | 579 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 580 | ocr &= ~R4_18V_PRESENT; |
0797e5f1 JR |
581 | } |
582 | ||
17d33e14 NP |
583 | /* |
584 | * Inform the card of the voltage | |
585 | */ | |
3bca4cf7 | 586 | if (!powered_resume) { |
db4a0d05 | 587 | err = mmc_send_io_op_cond(host, ocr, &rocr); |
3bca4cf7 CB |
588 | if (err) |
589 | goto err; | |
590 | } | |
17d33e14 NP |
591 | |
592 | /* | |
593 | * For SPI, enable CRC as appropriate. | |
594 | */ | |
595 | if (mmc_host_is_spi(host)) { | |
596 | err = mmc_spi_set_crc(host, use_spi_crc); | |
597 | if (err) | |
598 | goto err; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Allocate card structure. | |
603 | */ | |
604 | card = mmc_alloc_card(host, NULL); | |
605 | if (IS_ERR(card)) { | |
606 | err = PTR_ERR(card); | |
607 | goto err; | |
608 | } | |
609 | ||
db4a0d05 UH |
610 | if ((rocr & R4_MEMORY_PRESENT) && |
611 | mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) { | |
7310ece8 MM |
612 | card->type = MMC_TYPE_SD_COMBO; |
613 | ||
614 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
615 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
616 | mmc_remove_card(card); | |
617 | return -ENOENT; | |
618 | } | |
619 | } else { | |
620 | card->type = MMC_TYPE_SDIO; | |
621 | ||
622 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
623 | mmc_remove_card(card); | |
624 | return -ENOENT; | |
625 | } | |
626 | } | |
17d33e14 | 627 | |
3fcb027d DM |
628 | /* |
629 | * Call the optional HC's init_card function to handle quirks. | |
630 | */ | |
631 | if (host->ops->init_card) | |
632 | host->ops->init_card(host, card); | |
633 | ||
a303c531 PR |
634 | /* |
635 | * If the host and card support UHS-I mode request the card | |
636 | * to switch to 1.8V signaling level. No 1.8v signalling if | |
7122bbb0 | 637 | * UHS mode is not enabled to maintain compatibility and some |
a303c531 | 638 | * systems that claim 1.8v signalling in fact do not support |
5fc3d80e SL |
639 | * it. Per SDIO spec v3, section 3.1.2, if the voltage is already |
640 | * 1.8v, the card sets S18A to 0 in the R4 response. So it will | |
641 | * fails to check rocr & R4_18V_PRESENT, but we still need to | |
642 | * try to init uhs card. sdio_read_cccr will take over this task | |
643 | * to make sure which speed mode should work. | |
a303c531 | 644 | */ |
db4a0d05 | 645 | if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) { |
2ed573b6 | 646 | err = mmc_set_uhs_voltage(host, ocr_card); |
0797e5f1 | 647 | if (err == -EAGAIN) { |
0eb51a58 | 648 | mmc_sdio_resend_if_cond(host, card); |
0797e5f1 JR |
649 | retries--; |
650 | goto try_again; | |
651 | } else if (err) { | |
a303c531 | 652 | ocr &= ~R4_18V_PRESENT; |
a303c531 | 653 | } |
a303c531 PR |
654 | } |
655 | ||
17d33e14 NP |
656 | /* |
657 | * For native busses: set card RCA and quit open drain mode. | |
658 | */ | |
3bca4cf7 | 659 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
660 | err = mmc_send_relative_addr(host, &card->rca); |
661 | if (err) | |
662 | goto remove; | |
663 | ||
0aab3995 SNX |
664 | /* |
665 | * Update oldcard with the new RCA received from the SDIO | |
666 | * device -- we're doing this so that it's updated in the | |
667 | * "card" struct when oldcard overwrites that later. | |
668 | */ | |
669 | if (oldcard) | |
670 | oldcard->rca = card->rca; | |
17d33e14 NP |
671 | } |
672 | ||
7310ece8 MM |
673 | /* |
674 | * Read CSD, before selecting the card | |
675 | */ | |
676 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
677 | err = mmc_sd_get_csd(host, card); | |
678 | if (err) | |
679 | return err; | |
680 | ||
681 | mmc_decode_cid(card); | |
682 | } | |
683 | ||
17d33e14 NP |
684 | /* |
685 | * Select card, as all following commands rely on that. | |
686 | */ | |
3bca4cf7 | 687 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
688 | err = mmc_select_card(card); |
689 | if (err) | |
690 | goto remove; | |
691 | } | |
692 | ||
6f51be3d GI |
693 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
694 | /* | |
695 | * This is non-standard SDIO device, meaning it doesn't | |
696 | * have any CIA (Common I/O area) registers present. | |
697 | * It's host's responsibility to fill cccr and cis | |
698 | * structures in init_card(). | |
699 | */ | |
700 | mmc_set_clock(host, card->cis.max_dtr); | |
701 | ||
702 | if (card->cccr.high_speed) { | |
6f51be3d GI |
703 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
704 | } | |
705 | ||
706 | goto finish; | |
707 | } | |
708 | ||
17d33e14 | 709 | /* |
5fc3d80e SL |
710 | * Read the common registers. Note that we should try to |
711 | * validate whether UHS would work or not. | |
17d33e14 | 712 | */ |
2d0d68f5 | 713 | err = sdio_read_cccr(card, ocr); |
5fc3d80e SL |
714 | if (err) { |
715 | mmc_sdio_resend_if_cond(host, card); | |
716 | if (ocr & R4_18V_PRESENT) { | |
717 | /* Retry init sequence, but without R4_18V_PRESENT. */ | |
718 | retries = 0; | |
719 | goto try_again; | |
720 | } else { | |
721 | goto remove; | |
722 | } | |
723 | } | |
17d33e14 NP |
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; |
1144c1e4 | 742 | mmc_fixup_device(card, sdio_fixup_methods); |
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 | ||
e29a7d73 PO |
812 | for (i = 0;i < host->card->sdio_funcs;i++) { |
813 | if (host->card->sdio_func[i]) { | |
814 | sdio_remove_func(host->card->sdio_func[i]); | |
815 | host->card->sdio_func[i] = NULL; | |
816 | } | |
817 | } | |
818 | ||
5c4e6f13 PO |
819 | mmc_remove_card(host->card); |
820 | host->card = NULL; | |
821 | } | |
822 | ||
d3049504 AH |
823 | /* |
824 | * Card detection - card is alive. | |
825 | */ | |
826 | static int mmc_sdio_alive(struct mmc_host *host) | |
827 | { | |
828 | return mmc_select_card(host->card); | |
829 | } | |
830 | ||
5c4e6f13 PO |
831 | /* |
832 | * Card detection callback from host. | |
833 | */ | |
834 | static void mmc_sdio_detect(struct mmc_host *host) | |
835 | { | |
836 | int err; | |
837 | ||
87973ba2 | 838 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
839 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
840 | err = pm_runtime_get_sync(&host->card->dev); | |
3bffb800 LF |
841 | if (err < 0) { |
842 | pm_runtime_put_noidle(&host->card->dev); | |
ed919b01 | 843 | goto out; |
3bffb800 | 844 | } |
ed919b01 | 845 | } |
87973ba2 | 846 | |
5c4e6f13 PO |
847 | mmc_claim_host(host); |
848 | ||
849 | /* | |
850 | * Just check if our card has been removed. | |
851 | */ | |
d3049504 | 852 | err = _mmc_detect_card_removed(host); |
5c4e6f13 PO |
853 | |
854 | mmc_release_host(host); | |
855 | ||
4d0812c3 OBC |
856 | /* |
857 | * Tell PM core it's OK to power off the card now. | |
858 | * | |
859 | * The _sync variant is used in order to ensure that the card | |
860 | * is left powered off in case an error occurred, and the card | |
861 | * is going to be removed. | |
862 | * | |
863 | * Since there is no specific reason to believe a new user | |
864 | * is about to show up at this point, the _sync variant is | |
865 | * desirable anyway. | |
866 | */ | |
ed919b01 OBC |
867 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
868 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 869 | |
87973ba2 | 870 | out: |
5c4e6f13 PO |
871 | if (err) { |
872 | mmc_sdio_remove(host); | |
873 | ||
874 | mmc_claim_host(host); | |
875 | mmc_detach_bus(host); | |
7f7e4129 | 876 | mmc_power_off(host); |
5c4e6f13 PO |
877 | mmc_release_host(host); |
878 | } | |
879 | } | |
880 | ||
17d33e14 | 881 | /* |
810caddb | 882 | * SDIO pre_suspend. We need to suspend all functions separately. |
17d33e14 NP |
883 | * Therefore all registered functions must have drivers with suspend |
884 | * and resume methods. Failing that we simply remove the whole card. | |
885 | */ | |
810caddb | 886 | static int mmc_sdio_pre_suspend(struct mmc_host *host) |
17d33e14 | 887 | { |
95cdfb72 | 888 | int i, err = 0; |
17d33e14 | 889 | |
17d33e14 NP |
890 | for (i = 0; i < host->card->sdio_funcs; i++) { |
891 | struct sdio_func *func = host->card->sdio_func[i]; | |
892 | if (func && sdio_func_present(func) && func->dev.driver) { | |
893 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
894 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
895 | /* force removal of entire card in that case */ |
896 | err = -ENOSYS; | |
810caddb UH |
897 | break; |
898 | } | |
899 | } | |
900 | } | |
901 | ||
902 | return err; | |
903 | } | |
904 | ||
905 | /* | |
906 | * SDIO suspend. Suspend all functions separately. | |
907 | */ | |
908 | static int mmc_sdio_suspend(struct mmc_host *host) | |
909 | { | |
79202138 UH |
910 | /* Prevent processing of SDIO IRQs in suspended state. */ |
911 | mmc_card_set_suspended(host->card); | |
912 | cancel_delayed_work_sync(&host->sdio_irq_work); | |
913 | ||
8d1ffc8c UH |
914 | mmc_claim_host(host); |
915 | ||
916 | if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) | |
6b5eda36 | 917 | sdio_disable_wide(host->card); |
6b5eda36 | 918 | |
79d5a65a | 919 | if (!mmc_card_keep_power(host)) { |
74590263 | 920 | mmc_power_off(host); |
79d5a65a AH |
921 | } else if (host->retune_period) { |
922 | mmc_retune_timer_stop(host); | |
923 | mmc_retune_needed(host); | |
924 | } | |
74590263 | 925 | |
8d1ffc8c UH |
926 | mmc_release_host(host); |
927 | ||
573185cc | 928 | return 0; |
17d33e14 NP |
929 | } |
930 | ||
95cdfb72 | 931 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 932 | { |
573185cc | 933 | int err = 0; |
17d33e14 | 934 | |
95cdfb72 | 935 | /* Basic card reinitialization. */ |
17d33e14 | 936 | mmc_claim_host(host); |
080bc977 | 937 | |
74590263 UH |
938 | /* Restore power if needed */ |
939 | if (!mmc_card_keep_power(host)) { | |
69041150 | 940 | mmc_power_up(host, host->card->ocr); |
74590263 UH |
941 | /* |
942 | * Tell runtime PM core we just powered up the card, | |
943 | * since it still believes the card is powered off. | |
944 | * Note that currently runtime PM is only enabled | |
945 | * for SDIO cards that are MMC_CAP_POWER_OFF_CARD | |
946 | */ | |
947 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { | |
948 | pm_runtime_disable(&host->card->dev); | |
949 | pm_runtime_set_active(&host->card->dev); | |
950 | pm_runtime_enable(&host->card->dev); | |
951 | } | |
952 | } | |
953 | ||
080bc977 | 954 | /* No need to reinitialize powered-resumed nonremovable cards */ |
51aa66a5 SJ |
955 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
956 | sdio_reset(host); | |
957 | mmc_go_idle(host); | |
006fc51c N |
958 | mmc_send_if_cond(host, host->card->ocr); |
959 | err = mmc_send_io_op_cond(host, 0, NULL); | |
960 | if (!err) | |
961 | err = mmc_sdio_init_card(host, host->card->ocr, | |
962 | host->card, | |
963 | mmc_card_keep_power(host)); | |
51aa66a5 | 964 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
080bc977 OBC |
965 | /* We may have switched to 1-bit mode during suspend */ |
966 | err = sdio_enable_4bit_bus(host->card); | |
080bc977 OBC |
967 | } |
968 | ||
79202138 UH |
969 | if (err) |
970 | goto out; | |
971 | ||
972 | /* Allow SDIO IRQs to be processed again. */ | |
973 | mmc_card_clr_suspended(host->card); | |
974 | ||
975 | if (host->sdio_irqs) { | |
9eadcc05 | 976 | if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) |
dea67c4e | 977 | wake_up_process(host->sdio_irq_thread); |
9eadcc05 | 978 | else if (host->caps & MMC_CAP_SDIO_IRQ) |
dea67c4e | 979 | host->ops->enable_sdio_irq(host, 1); |
dea67c4e FZ |
980 | } |
981 | ||
79202138 | 982 | out: |
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 | ||
d3fe37b1 | 993 | mmc_claim_host(host); |
c6e633ad DD |
994 | |
995 | /* | |
996 | * Reset the card by performing the same steps that are taken by | |
997 | * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe. | |
998 | * | |
999 | * sdio_reset() is technically not needed. Having just powered up the | |
1000 | * hardware, it should already be in reset state. However, some | |
1001 | * platforms (such as SD8686 on OLPC) do not instantly cut power, | |
1002 | * meaning that a reset is required when restoring power soon after | |
1003 | * powering off. It is harmless in other cases. | |
1004 | * | |
1005 | * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec, | |
1006 | * is not necessary for non-removable cards. However, it is required | |
1007 | * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and | |
1008 | * harmless in other situations. | |
1009 | * | |
c6e633ad | 1010 | */ |
e7747475 | 1011 | |
c6e633ad DD |
1012 | sdio_reset(host); |
1013 | mmc_go_idle(host); | |
59b6c9e0 | 1014 | mmc_send_if_cond(host, host->card->ocr); |
c6e633ad | 1015 | |
ce69d37b | 1016 | ret = mmc_send_io_op_cond(host, 0, NULL); |
c6e633ad DD |
1017 | if (ret) |
1018 | goto out; | |
1019 | ||
ce69d37b | 1020 | ret = mmc_sdio_init_card(host, host->card->ocr, host->card, |
a5e9425d | 1021 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
1022 | if (!ret && host->sdio_irqs) |
1023 | mmc_signal_sdio_irq(host); | |
c6e633ad DD |
1024 | |
1025 | out: | |
d3fe37b1 OBC |
1026 | mmc_release_host(host); |
1027 | ||
1028 | return ret; | |
1029 | } | |
1030 | ||
12d01d0b UH |
1031 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
1032 | { | |
1033 | /* No references to the card, cut the power to it. */ | |
8d1ffc8c | 1034 | mmc_claim_host(host); |
12d01d0b | 1035 | mmc_power_off(host); |
8d1ffc8c UH |
1036 | mmc_release_host(host); |
1037 | ||
12d01d0b UH |
1038 | return 0; |
1039 | } | |
1040 | ||
1041 | static int mmc_sdio_runtime_resume(struct mmc_host *host) | |
1042 | { | |
8d1ffc8c UH |
1043 | int ret; |
1044 | ||
12d01d0b | 1045 | /* Restore power and re-initialize. */ |
8d1ffc8c | 1046 | mmc_claim_host(host); |
69041150 | 1047 | mmc_power_up(host, host->card->ocr); |
8d1ffc8c UH |
1048 | ret = mmc_sdio_power_restore(host); |
1049 | mmc_release_host(host); | |
1050 | ||
1051 | return ret; | |
12d01d0b UH |
1052 | } |
1053 | ||
1fb654fd AF |
1054 | static int mmc_sdio_reset(struct mmc_host *host) |
1055 | { | |
1056 | mmc_power_cycle(host, host->card->ocr); | |
1057 | return mmc_sdio_power_restore(host); | |
1058 | } | |
1059 | ||
5c4e6f13 PO |
1060 | static const struct mmc_bus_ops mmc_sdio_ops = { |
1061 | .remove = mmc_sdio_remove, | |
1062 | .detect = mmc_sdio_detect, | |
810caddb | 1063 | .pre_suspend = mmc_sdio_pre_suspend, |
17d33e14 NP |
1064 | .suspend = mmc_sdio_suspend, |
1065 | .resume = mmc_sdio_resume, | |
12d01d0b UH |
1066 | .runtime_suspend = mmc_sdio_runtime_suspend, |
1067 | .runtime_resume = mmc_sdio_runtime_resume, | |
d3fe37b1 | 1068 | .power_restore = mmc_sdio_power_restore, |
d3049504 | 1069 | .alive = mmc_sdio_alive, |
1fb654fd | 1070 | .reset = mmc_sdio_reset, |
5c4e6f13 PO |
1071 | }; |
1072 | ||
1073 | ||
1074 | /* | |
1075 | * Starting point for SDIO card init. | |
1076 | */ | |
807e8e40 | 1077 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 1078 | { |
807e8e40 | 1079 | int err, i, funcs; |
69041150 | 1080 | u32 ocr, rocr; |
5c4e6f13 PO |
1081 | struct mmc_card *card; |
1082 | ||
d84075c8 | 1083 | WARN_ON(!host->claimed); |
5c4e6f13 | 1084 | |
807e8e40 AR |
1085 | err = mmc_send_io_op_cond(host, 0, &ocr); |
1086 | if (err) | |
1087 | return err; | |
1088 | ||
5c4e6f13 | 1089 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
1090 | if (host->ocr_avail_sdio) |
1091 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 | 1092 | |
5c4e6f13 | 1093 | |
69041150 | 1094 | rocr = mmc_select_voltage(host, ocr); |
5c4e6f13 PO |
1095 | |
1096 | /* | |
1097 | * Can we support the voltage(s) of the card(s)? | |
1098 | */ | |
69041150 | 1099 | if (!rocr) { |
5c4e6f13 PO |
1100 | err = -EINVAL; |
1101 | goto err; | |
1102 | } | |
1103 | ||
1104 | /* | |
17d33e14 | 1105 | * Detect and init the card. |
5c4e6f13 | 1106 | */ |
69041150 | 1107 | err = mmc_sdio_init_card(host, rocr, NULL, 0); |
ec2ed700 UH |
1108 | if (err) |
1109 | goto err; | |
1110 | ||
17d33e14 | 1111 | card = host->card; |
af517150 | 1112 | |
81968561 | 1113 | /* |
ed919b01 | 1114 | * Enable runtime PM only if supported by host+card+board |
81968561 | 1115 | */ |
ed919b01 | 1116 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
4760257c AH |
1117 | /* |
1118 | * Do not allow runtime suspend until after SDIO function | |
1119 | * devices are added. | |
1120 | */ | |
1121 | pm_runtime_get_noresume(&card->dev); | |
1122 | ||
ed919b01 OBC |
1123 | /* |
1124 | * Let runtime PM core know our card is active | |
1125 | */ | |
1126 | err = pm_runtime_set_active(&card->dev); | |
1127 | if (err) | |
1128 | goto remove; | |
81968561 | 1129 | |
ed919b01 OBC |
1130 | /* |
1131 | * Enable runtime PM for this card | |
1132 | */ | |
1133 | pm_runtime_enable(&card->dev); | |
1134 | } | |
81968561 | 1135 | |
5c4e6f13 PO |
1136 | /* |
1137 | * The number of functions on the card is encoded inside | |
1138 | * the ocr. | |
1139 | */ | |
e8812793 MF |
1140 | funcs = (ocr & 0x70000000) >> 28; |
1141 | card->sdio_funcs = 0; | |
4ff6471c | 1142 | |
e29a7d73 PO |
1143 | /* |
1144 | * Initialize (but don't add) all present functions. | |
1145 | */ | |
e8812793 | 1146 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
1147 | err = sdio_init_func(host->card, i + 1); |
1148 | if (err) | |
1149 | goto remove; | |
40bba0c1 OBC |
1150 | |
1151 | /* | |
ed919b01 | 1152 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 1153 | */ |
ed919b01 OBC |
1154 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1155 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 1156 | } |
5c4e6f13 | 1157 | |
e29a7d73 PO |
1158 | /* |
1159 | * First add the card to the driver model... | |
1160 | */ | |
807e8e40 | 1161 | mmc_release_host(host); |
5c4e6f13 PO |
1162 | err = mmc_add_card(host->card); |
1163 | if (err) | |
e29a7d73 PO |
1164 | goto remove_added; |
1165 | ||
1166 | /* | |
1167 | * ...then the SDIO functions. | |
1168 | */ | |
1169 | for (i = 0;i < funcs;i++) { | |
1170 | err = sdio_add_func(host->card->sdio_func[i]); | |
1171 | if (err) | |
1172 | goto remove_added; | |
1173 | } | |
5c4e6f13 | 1174 | |
4760257c AH |
1175 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1176 | pm_runtime_put(&card->dev); | |
1177 | ||
34497913 | 1178 | mmc_claim_host(host); |
5c4e6f13 PO |
1179 | return 0; |
1180 | ||
e29a7d73 | 1181 | |
e29a7d73 | 1182 | remove: |
807e8e40 | 1183 | mmc_release_host(host); |
82e7edc2 AH |
1184 | remove_added: |
1185 | /* | |
1186 | * The devices are being deleted so it is not necessary to disable | |
4760257c AH |
1187 | * runtime PM. Similarly we also don't pm_runtime_put() the SDIO card |
1188 | * because it needs to be active to remove any function devices that | |
1189 | * were probed, and after that it gets deleted. | |
82e7edc2 AH |
1190 | */ |
1191 | mmc_sdio_remove(host); | |
807e8e40 | 1192 | mmc_claim_host(host); |
5c4e6f13 PO |
1193 | err: |
1194 | mmc_detach_bus(host); | |
5c4e6f13 | 1195 | |
a3c76eb9 | 1196 | pr_err("%s: error %d whilst initialising SDIO card\n", |
5c4e6f13 PO |
1197 | mmc_hostname(host), err); |
1198 | ||
1199 | return err; | |
1200 | } | |
1201 |