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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" | |
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 | ||
5df0e823 SL |
66 | if (WARN_ON(fn > SDIO_MAX_FUNCS)) |
67 | return -EINVAL; | |
e29a7d73 PO |
68 | |
69 | func = sdio_alloc_func(card); | |
70 | if (IS_ERR(func)) | |
71 | return PTR_ERR(func); | |
72 | ||
73 | func->num = fn; | |
74 | ||
6f51be3d GI |
75 | if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) { |
76 | ret = sdio_read_fbr(func); | |
77 | if (ret) | |
78 | goto fail; | |
0597007f | 79 | |
6f51be3d GI |
80 | ret = sdio_read_func_cis(func); |
81 | if (ret) | |
82 | goto fail; | |
83 | } else { | |
84 | func->vendor = func->card->cis.vendor; | |
85 | func->device = func->card->cis.device; | |
86 | func->max_blksize = func->card->cis.blksize; | |
87 | } | |
b7261261 | 88 | |
e29a7d73 PO |
89 | card->sdio_func[fn - 1] = func; |
90 | ||
91 | return 0; | |
0597007f PO |
92 | |
93 | fail: | |
94 | /* | |
95 | * It is okay to remove the function here even though we hold | |
96 | * the host lock as we haven't registered the device yet. | |
97 | */ | |
98 | sdio_remove_func(func); | |
99 | return ret; | |
e29a7d73 PO |
100 | } |
101 | ||
2d0d68f5 | 102 | static int sdio_read_cccr(struct mmc_card *card, u32 ocr) |
35c66c19 PO |
103 | { |
104 | int ret; | |
105 | int cccr_vsn; | |
2d0d68f5 | 106 | int uhs = ocr & R4_18V_PRESENT; |
35c66c19 | 107 | unsigned char data; |
a303c531 | 108 | unsigned char speed; |
35c66c19 | 109 | |
35c66c19 PO |
110 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); |
111 | if (ret) | |
112 | goto out; | |
113 | ||
114 | cccr_vsn = data & 0x0f; | |
115 | ||
b4625dab | 116 | if (cccr_vsn > SDIO_CCCR_REV_3_00) { |
a3c76eb9 | 117 | pr_err("%s: unrecognised CCCR structure version %d\n", |
35c66c19 PO |
118 | mmc_hostname(card->host), cccr_vsn); |
119 | return -EINVAL; | |
120 | } | |
121 | ||
122 | card->cccr.sdio_vsn = (data & 0xf0) >> 4; | |
123 | ||
124 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); | |
125 | if (ret) | |
126 | goto out; | |
127 | ||
128 | if (data & SDIO_CCCR_CAP_SMB) | |
129 | card->cccr.multi_block = 1; | |
130 | if (data & SDIO_CCCR_CAP_LSC) | |
131 | card->cccr.low_speed = 1; | |
132 | if (data & SDIO_CCCR_CAP_4BLS) | |
133 | card->cccr.wide_bus = 1; | |
134 | ||
135 | if (cccr_vsn >= SDIO_CCCR_REV_1_10) { | |
136 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); | |
137 | if (ret) | |
138 | goto out; | |
139 | ||
140 | if (data & SDIO_POWER_SMPC) | |
141 | card->cccr.high_power = 1; | |
142 | } | |
143 | ||
144 | if (cccr_vsn >= SDIO_CCCR_REV_1_20) { | |
a303c531 | 145 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); |
35c66c19 PO |
146 | if (ret) |
147 | goto out; | |
148 | ||
a303c531 PR |
149 | card->scr.sda_spec3 = 0; |
150 | card->sw_caps.sd3_bus_mode = 0; | |
151 | card->sw_caps.sd3_drv_type = 0; | |
2d0d68f5 | 152 | if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) { |
a303c531 PR |
153 | card->scr.sda_spec3 = 1; |
154 | ret = mmc_io_rw_direct(card, 0, 0, | |
155 | SDIO_CCCR_UHS, 0, &data); | |
156 | if (ret) | |
157 | goto out; | |
158 | ||
41875e38 | 159 | if (mmc_host_uhs(card->host)) { |
a303c531 PR |
160 | if (data & SDIO_UHS_DDR50) |
161 | card->sw_caps.sd3_bus_mode | |
162 | |= SD_MODE_UHS_DDR50; | |
163 | ||
164 | if (data & SDIO_UHS_SDR50) | |
165 | card->sw_caps.sd3_bus_mode | |
166 | |= SD_MODE_UHS_SDR50; | |
167 | ||
168 | if (data & SDIO_UHS_SDR104) | |
169 | card->sw_caps.sd3_bus_mode | |
170 | |= SD_MODE_UHS_SDR104; | |
171 | } | |
172 | ||
173 | ret = mmc_io_rw_direct(card, 0, 0, | |
174 | SDIO_CCCR_DRIVE_STRENGTH, 0, &data); | |
175 | if (ret) | |
176 | goto out; | |
177 | ||
178 | if (data & SDIO_DRIVE_SDTA) | |
179 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A; | |
180 | if (data & SDIO_DRIVE_SDTC) | |
181 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C; | |
182 | if (data & SDIO_DRIVE_SDTD) | |
183 | card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D; | |
184 | } | |
185 | ||
186 | /* if no uhs mode ensure we check for high speed */ | |
187 | if (!card->sw_caps.sd3_bus_mode) { | |
188 | if (speed & SDIO_SPEED_SHS) { | |
189 | card->cccr.high_speed = 1; | |
190 | card->sw_caps.hs_max_dtr = 50000000; | |
191 | } else { | |
192 | card->cccr.high_speed = 0; | |
193 | card->sw_caps.hs_max_dtr = 25000000; | |
194 | } | |
195 | } | |
35c66c19 PO |
196 | } |
197 | ||
198 | out: | |
199 | return ret; | |
200 | } | |
201 | ||
4ff6471c PO |
202 | static int sdio_enable_wide(struct mmc_card *card) |
203 | { | |
204 | int ret; | |
205 | u8 ctrl; | |
206 | ||
207 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
208 | return 0; | |
209 | ||
210 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
211 | return 0; | |
212 | ||
213 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
214 | if (ret) | |
215 | return ret; | |
216 | ||
2a0fe914 | 217 | if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED) |
6606110d JP |
218 | pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n", |
219 | mmc_hostname(card->host), ctrl); | |
2a0fe914 YD |
220 | |
221 | /* set as 4-bit bus width */ | |
222 | ctrl &= ~SDIO_BUS_WIDTH_MASK; | |
4ff6471c PO |
223 | ctrl |= SDIO_BUS_WIDTH_4BIT; |
224 | ||
225 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
226 | if (ret) | |
227 | return ret; | |
228 | ||
7310ece8 | 229 | return 1; |
4ff6471c PO |
230 | } |
231 | ||
006ebd5d OBC |
232 | /* |
233 | * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1) | |
234 | * of the card. This may be required on certain setups of boards, | |
235 | * controllers and embedded sdio device which do not need the card's | |
236 | * pull-up. As a result, card detection is disabled and power is saved. | |
237 | */ | |
238 | static int sdio_disable_cd(struct mmc_card *card) | |
239 | { | |
240 | int ret; | |
241 | u8 ctrl; | |
242 | ||
2059a02d | 243 | if (!mmc_card_disable_cd(card)) |
006ebd5d OBC |
244 | return 0; |
245 | ||
246 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
247 | if (ret) | |
248 | return ret; | |
249 | ||
250 | ctrl |= SDIO_BUS_CD_DISABLE; | |
251 | ||
252 | return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
253 | } | |
254 | ||
6b5eda36 DD |
255 | /* |
256 | * Devices that remain active during a system suspend are | |
257 | * put back into 1-bit mode. | |
258 | */ | |
259 | static int sdio_disable_wide(struct mmc_card *card) | |
260 | { | |
261 | int ret; | |
262 | u8 ctrl; | |
263 | ||
264 | if (!(card->host->caps & MMC_CAP_4_BIT_DATA)) | |
265 | return 0; | |
266 | ||
267 | if (card->cccr.low_speed && !card->cccr.wide_bus) | |
268 | return 0; | |
269 | ||
270 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); | |
271 | if (ret) | |
272 | return ret; | |
273 | ||
274 | if (!(ctrl & SDIO_BUS_WIDTH_4BIT)) | |
275 | return 0; | |
276 | ||
277 | ctrl &= ~SDIO_BUS_WIDTH_4BIT; | |
278 | ctrl |= SDIO_BUS_ASYNC_INT; | |
279 | ||
280 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); | |
281 | if (ret) | |
282 | return ret; | |
283 | ||
284 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
7310ece8 MM |
289 | |
290 | static int sdio_enable_4bit_bus(struct mmc_card *card) | |
291 | { | |
292 | int err; | |
293 | ||
294 | if (card->type == MMC_TYPE_SDIO) | |
303dbedc N |
295 | err = sdio_enable_wide(card); |
296 | else if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
297 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
7310ece8 MM |
298 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
299 | if (err) | |
300 | return err; | |
303dbedc N |
301 | err = sdio_enable_wide(card); |
302 | if (err <= 0) | |
303 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); | |
7310ece8 MM |
304 | } else |
305 | return 0; | |
306 | ||
303dbedc N |
307 | if (err > 0) { |
308 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
309 | err = 0; | |
310 | } | |
7310ece8 MM |
311 | |
312 | return err; | |
313 | } | |
314 | ||
315 | ||
d16f5770 PO |
316 | /* |
317 | * Test if the card supports high-speed mode and, if so, switch to it. | |
318 | */ | |
7310ece8 | 319 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
d16f5770 PO |
320 | { |
321 | int ret; | |
322 | u8 speed; | |
323 | ||
324 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) | |
325 | return 0; | |
326 | ||
327 | if (!card->cccr.high_speed) | |
328 | return 0; | |
329 | ||
330 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
331 | if (ret) | |
332 | return ret; | |
333 | ||
7310ece8 MM |
334 | if (enable) |
335 | speed |= SDIO_SPEED_EHS; | |
336 | else | |
337 | speed &= ~SDIO_SPEED_EHS; | |
d16f5770 PO |
338 | |
339 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
340 | if (ret) | |
341 | return ret; | |
342 | ||
71578a1e MM |
343 | return 1; |
344 | } | |
d16f5770 | 345 | |
7310ece8 MM |
346 | /* |
347 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. | |
348 | */ | |
349 | static int sdio_enable_hs(struct mmc_card *card) | |
350 | { | |
351 | int ret; | |
352 | ||
353 | ret = mmc_sdio_switch_hs(card, true); | |
354 | if (ret <= 0 || card->type == MMC_TYPE_SDIO) | |
355 | return ret; | |
356 | ||
357 | ret = mmc_sd_switch_hs(card); | |
358 | if (ret <= 0) | |
359 | mmc_sdio_switch_hs(card, false); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
71578a1e MM |
364 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
365 | { | |
366 | unsigned max_dtr; | |
367 | ||
cdc99179 | 368 | if (mmc_card_hs(card)) { |
71578a1e MM |
369 | /* |
370 | * The SDIO specification doesn't mention how | |
371 | * the CIS transfer speed register relates to | |
372 | * high-speed, but it seems that 50 MHz is | |
373 | * mandatory. | |
374 | */ | |
375 | max_dtr = 50000000; | |
376 | } else { | |
377 | max_dtr = card->cis.max_dtr; | |
378 | } | |
379 | ||
7310ece8 MM |
380 | if (card->type == MMC_TYPE_SD_COMBO) |
381 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); | |
382 | ||
71578a1e | 383 | return max_dtr; |
d16f5770 PO |
384 | } |
385 | ||
a303c531 PR |
386 | static unsigned char host_drive_to_sdio_drive(int host_strength) |
387 | { | |
388 | switch (host_strength) { | |
389 | case MMC_SET_DRIVER_TYPE_A: | |
390 | return SDIO_DTSx_SET_TYPE_A; | |
391 | case MMC_SET_DRIVER_TYPE_B: | |
392 | return SDIO_DTSx_SET_TYPE_B; | |
393 | case MMC_SET_DRIVER_TYPE_C: | |
394 | return SDIO_DTSx_SET_TYPE_C; | |
395 | case MMC_SET_DRIVER_TYPE_D: | |
396 | return SDIO_DTSx_SET_TYPE_D; | |
397 | default: | |
398 | return SDIO_DTSx_SET_TYPE_B; | |
399 | } | |
400 | } | |
401 | ||
402 | static void sdio_select_driver_type(struct mmc_card *card) | |
403 | { | |
fa021cef | 404 | int card_drv_type, drive_strength, drv_type; |
a303c531 PR |
405 | unsigned char card_strength; |
406 | int err; | |
407 | ||
3853a042 AH |
408 | card->drive_strength = 0; |
409 | ||
fa021cef | 410 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
a303c531 | 411 | |
e23350b3 AH |
412 | drive_strength = mmc_select_drive_strength(card, |
413 | card->sw_caps.uhs_max_dtr, | |
414 | card_drv_type, &drv_type); | |
a303c531 | 415 | |
b4f30a17 AH |
416 | if (drive_strength) { |
417 | /* if error just use default for drive strength B */ | |
418 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0, | |
419 | &card_strength); | |
420 | if (err) | |
421 | return; | |
a303c531 | 422 | |
b4f30a17 AH |
423 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); |
424 | card_strength |= host_drive_to_sdio_drive(drive_strength); | |
a303c531 | 425 | |
b4f30a17 AH |
426 | /* if error default to drive strength B */ |
427 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH, | |
428 | card_strength, NULL); | |
429 | if (err) | |
430 | return; | |
3853a042 | 431 | card->drive_strength = drive_strength; |
b4f30a17 | 432 | } |
a303c531 | 433 | |
b4f30a17 AH |
434 | if (drv_type) |
435 | mmc_set_driver_type(card->host, drv_type); | |
a303c531 PR |
436 | } |
437 | ||
438 | ||
439 | static int sdio_set_bus_speed_mode(struct mmc_card *card) | |
440 | { | |
441 | unsigned int bus_speed, timing; | |
442 | int err; | |
443 | unsigned char speed; | |
444 | ||
445 | /* | |
446 | * If the host doesn't support any of the UHS-I modes, fallback on | |
447 | * default speed. | |
448 | */ | |
41875e38 | 449 | if (!mmc_host_uhs(card->host)) |
a303c531 PR |
450 | return 0; |
451 | ||
452 | bus_speed = SDIO_SPEED_SDR12; | |
453 | timing = MMC_TIMING_UHS_SDR12; | |
454 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
455 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
456 | bus_speed = SDIO_SPEED_SDR104; | |
457 | timing = MMC_TIMING_UHS_SDR104; | |
458 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
77e2ff08 | 459 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
a303c531 PR |
460 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
461 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
462 | bus_speed = SDIO_SPEED_DDR50; | |
463 | timing = MMC_TIMING_UHS_DDR50; | |
464 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
77e2ff08 | 465 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
a303c531 PR |
466 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
467 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
468 | SD_MODE_UHS_SDR50)) { | |
469 | bus_speed = SDIO_SPEED_SDR50; | |
470 | timing = MMC_TIMING_UHS_SDR50; | |
471 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
77e2ff08 | 472 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
a303c531 PR |
473 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
474 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
475 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
476 | bus_speed = SDIO_SPEED_SDR25; | |
477 | timing = MMC_TIMING_UHS_SDR25; | |
478 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
77e2ff08 | 479 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
a303c531 PR |
480 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
481 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
482 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
483 | SD_MODE_UHS_SDR12)) { | |
484 | bus_speed = SDIO_SPEED_SDR12; | |
485 | timing = MMC_TIMING_UHS_SDR12; | |
486 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
77e2ff08 | 487 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
a303c531 PR |
488 | } |
489 | ||
490 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
491 | if (err) | |
492 | return err; | |
493 | ||
494 | speed &= ~SDIO_SPEED_BSS_MASK; | |
495 | speed |= bus_speed; | |
496 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
497 | if (err) | |
498 | return err; | |
499 | ||
500 | if (bus_speed) { | |
501 | mmc_set_timing(card->host, timing); | |
502 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | /* | |
509 | * UHS-I specific initialization procedure | |
510 | */ | |
511 | static int mmc_sdio_init_uhs_card(struct mmc_card *card) | |
512 | { | |
513 | int err; | |
514 | ||
515 | if (!card->scr.sda_spec3) | |
516 | return 0; | |
517 | ||
518 | /* | |
519 | * Switch to wider bus (if supported). | |
520 | */ | |
303dbedc | 521 | if (card->host->caps & MMC_CAP_4_BIT_DATA) |
a303c531 | 522 | err = sdio_enable_4bit_bus(card); |
a303c531 PR |
523 | |
524 | /* Set the driver strength for the card */ | |
525 | sdio_select_driver_type(card); | |
526 | ||
527 | /* Set bus speed mode of the card */ | |
528 | err = sdio_set_bus_speed_mode(card); | |
529 | if (err) | |
530 | goto out; | |
531 | ||
810e08ee FS |
532 | /* |
533 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
534 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
535 | */ | |
63e415c6 | 536 | if (!mmc_host_is_spi(card->host) && |
e10c3219 CC |
537 | ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) || |
538 | (card->host->ios.timing == MMC_TIMING_UHS_SDR104))) | |
63e415c6 | 539 | err = mmc_execute_tuning(card); |
a303c531 | 540 | out: |
a303c531 PR |
541 | return err; |
542 | } | |
543 | ||
0eb51a58 SL |
544 | static void mmc_sdio_resend_if_cond(struct mmc_host *host, |
545 | struct mmc_card *card) | |
546 | { | |
547 | sdio_reset(host); | |
548 | mmc_go_idle(host); | |
549 | mmc_send_if_cond(host, host->ocr_avail); | |
550 | mmc_remove_card(card); | |
551 | } | |
552 | ||
17d33e14 NP |
553 | /* |
554 | * Handle the detection and initialisation of a card. | |
555 | * | |
556 | * In the case of a resume, "oldcard" will contain the card | |
557 | * we're trying to reinitialise. | |
558 | */ | |
559 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 560 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
561 | { |
562 | struct mmc_card *card; | |
563 | int err; | |
0797e5f1 | 564 | int retries = 10; |
db4a0d05 | 565 | u32 rocr = 0; |
69041150 | 566 | u32 ocr_card = ocr; |
17d33e14 | 567 | |
17d33e14 NP |
568 | WARN_ON(!host->claimed); |
569 | ||
db4a0d05 UH |
570 | /* to query card if 1.8V signalling is supported */ |
571 | if (mmc_host_uhs(host)) | |
572 | ocr |= R4_18V_PRESENT; | |
573 | ||
0797e5f1 JR |
574 | try_again: |
575 | if (!retries) { | |
6606110d | 576 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 577 | ocr &= ~R4_18V_PRESENT; |
0797e5f1 JR |
578 | } |
579 | ||
17d33e14 NP |
580 | /* |
581 | * Inform the card of the voltage | |
582 | */ | |
3bca4cf7 | 583 | if (!powered_resume) { |
db4a0d05 | 584 | err = mmc_send_io_op_cond(host, ocr, &rocr); |
3bca4cf7 CB |
585 | if (err) |
586 | goto err; | |
587 | } | |
17d33e14 NP |
588 | |
589 | /* | |
590 | * For SPI, enable CRC as appropriate. | |
591 | */ | |
592 | if (mmc_host_is_spi(host)) { | |
593 | err = mmc_spi_set_crc(host, use_spi_crc); | |
594 | if (err) | |
595 | goto err; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Allocate card structure. | |
600 | */ | |
601 | card = mmc_alloc_card(host, NULL); | |
602 | if (IS_ERR(card)) { | |
603 | err = PTR_ERR(card); | |
604 | goto err; | |
605 | } | |
606 | ||
db4a0d05 UH |
607 | if ((rocr & R4_MEMORY_PRESENT) && |
608 | mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) { | |
7310ece8 MM |
609 | card->type = MMC_TYPE_SD_COMBO; |
610 | ||
611 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
612 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
613 | mmc_remove_card(card); | |
614 | return -ENOENT; | |
615 | } | |
616 | } else { | |
617 | card->type = MMC_TYPE_SDIO; | |
618 | ||
619 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
620 | mmc_remove_card(card); | |
621 | return -ENOENT; | |
622 | } | |
623 | } | |
17d33e14 | 624 | |
3fcb027d DM |
625 | /* |
626 | * Call the optional HC's init_card function to handle quirks. | |
627 | */ | |
628 | if (host->ops->init_card) | |
629 | host->ops->init_card(host, card); | |
630 | ||
a303c531 PR |
631 | /* |
632 | * If the host and card support UHS-I mode request the card | |
633 | * to switch to 1.8V signaling level. No 1.8v signalling if | |
7122bbb0 | 634 | * UHS mode is not enabled to maintain compatibility and some |
a303c531 | 635 | * systems that claim 1.8v signalling in fact do not support |
5fc3d80e SL |
636 | * it. Per SDIO spec v3, section 3.1.2, if the voltage is already |
637 | * 1.8v, the card sets S18A to 0 in the R4 response. So it will | |
638 | * fails to check rocr & R4_18V_PRESENT, but we still need to | |
639 | * try to init uhs card. sdio_read_cccr will take over this task | |
640 | * to make sure which speed mode should work. | |
a303c531 | 641 | */ |
db4a0d05 | 642 | if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) { |
0f791fda | 643 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
d9bfbb95 | 644 | ocr_card); |
0797e5f1 | 645 | if (err == -EAGAIN) { |
0eb51a58 | 646 | mmc_sdio_resend_if_cond(host, card); |
0797e5f1 JR |
647 | retries--; |
648 | goto try_again; | |
649 | } else if (err) { | |
a303c531 | 650 | ocr &= ~R4_18V_PRESENT; |
a303c531 | 651 | } |
a303c531 PR |
652 | } |
653 | ||
17d33e14 NP |
654 | /* |
655 | * For native busses: set card RCA and quit open drain mode. | |
656 | */ | |
3bca4cf7 | 657 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
658 | err = mmc_send_relative_addr(host, &card->rca); |
659 | if (err) | |
660 | goto remove; | |
661 | ||
0aab3995 SNX |
662 | /* |
663 | * Update oldcard with the new RCA received from the SDIO | |
664 | * device -- we're doing this so that it's updated in the | |
665 | * "card" struct when oldcard overwrites that later. | |
666 | */ | |
667 | if (oldcard) | |
668 | oldcard->rca = card->rca; | |
17d33e14 NP |
669 | } |
670 | ||
7310ece8 MM |
671 | /* |
672 | * Read CSD, before selecting the card | |
673 | */ | |
674 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
675 | err = mmc_sd_get_csd(host, card); | |
676 | if (err) | |
677 | return err; | |
678 | ||
679 | mmc_decode_cid(card); | |
680 | } | |
681 | ||
17d33e14 NP |
682 | /* |
683 | * Select card, as all following commands rely on that. | |
684 | */ | |
3bca4cf7 | 685 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
686 | err = mmc_select_card(card); |
687 | if (err) | |
688 | goto remove; | |
689 | } | |
690 | ||
6f51be3d GI |
691 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
692 | /* | |
693 | * This is non-standard SDIO device, meaning it doesn't | |
694 | * have any CIA (Common I/O area) registers present. | |
695 | * It's host's responsibility to fill cccr and cis | |
696 | * structures in init_card(). | |
697 | */ | |
698 | mmc_set_clock(host, card->cis.max_dtr); | |
699 | ||
700 | if (card->cccr.high_speed) { | |
6f51be3d GI |
701 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
702 | } | |
703 | ||
704 | goto finish; | |
705 | } | |
706 | ||
17d33e14 | 707 | /* |
5fc3d80e SL |
708 | * Read the common registers. Note that we should try to |
709 | * validate whether UHS would work or not. | |
17d33e14 | 710 | */ |
2d0d68f5 | 711 | err = sdio_read_cccr(card, ocr); |
5fc3d80e SL |
712 | if (err) { |
713 | mmc_sdio_resend_if_cond(host, card); | |
714 | if (ocr & R4_18V_PRESENT) { | |
715 | /* Retry init sequence, but without R4_18V_PRESENT. */ | |
716 | retries = 0; | |
717 | goto try_again; | |
718 | } else { | |
719 | goto remove; | |
720 | } | |
721 | } | |
17d33e14 NP |
722 | |
723 | /* | |
724 | * Read the common CIS tuples. | |
725 | */ | |
726 | err = sdio_read_common_cis(card); | |
727 | if (err) | |
728 | goto remove; | |
729 | ||
730 | if (oldcard) { | |
731 | int same = (card->cis.vendor == oldcard->cis.vendor && | |
732 | card->cis.device == oldcard->cis.device); | |
733 | mmc_remove_card(card); | |
7310ece8 MM |
734 | if (!same) |
735 | return -ENOENT; | |
736 | ||
17d33e14 NP |
737 | card = oldcard; |
738 | } | |
69041150 | 739 | card->ocr = ocr_card; |
32780cd1 | 740 | mmc_fixup_device(card, NULL); |
17d33e14 | 741 | |
7310ece8 MM |
742 | if (card->type == MMC_TYPE_SD_COMBO) { |
743 | err = mmc_sd_setup_card(host, card, oldcard != NULL); | |
744 | /* handle as SDIO-only card if memory init failed */ | |
745 | if (err) { | |
746 | mmc_go_idle(host); | |
747 | if (mmc_host_is_spi(host)) | |
748 | /* should not fail, as it worked previously */ | |
749 | mmc_spi_set_crc(host, use_spi_crc); | |
750 | card->type = MMC_TYPE_SDIO; | |
751 | } else | |
752 | card->dev.type = &sd_type; | |
753 | } | |
754 | ||
755 | /* | |
756 | * If needed, disconnect card detection pull-up resistor. | |
757 | */ | |
758 | err = sdio_disable_cd(card); | |
759 | if (err) | |
760 | goto remove; | |
761 | ||
a303c531 PR |
762 | /* Initialization sequence for UHS-I cards */ |
763 | /* Only if card supports 1.8v and UHS signaling */ | |
764 | if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) { | |
765 | err = mmc_sdio_init_uhs_card(card); | |
766 | if (err) | |
767 | goto remove; | |
a303c531 PR |
768 | } else { |
769 | /* | |
770 | * Switch to high-speed (if supported). | |
771 | */ | |
772 | err = sdio_enable_hs(card); | |
773 | if (err > 0) | |
cdc99179 | 774 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
a303c531 PR |
775 | else if (err) |
776 | goto remove; | |
17d33e14 | 777 | |
a303c531 PR |
778 | /* |
779 | * Change to the card's maximum speed. | |
780 | */ | |
781 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); | |
17d33e14 | 782 | |
a303c531 PR |
783 | /* |
784 | * Switch to wider bus (if supported). | |
785 | */ | |
786 | err = sdio_enable_4bit_bus(card); | |
303dbedc | 787 | if (err) |
a303c531 PR |
788 | goto remove; |
789 | } | |
6f51be3d | 790 | finish: |
17d33e14 NP |
791 | if (!oldcard) |
792 | host->card = card; | |
793 | return 0; | |
794 | ||
795 | remove: | |
796 | if (!oldcard) | |
797 | mmc_remove_card(card); | |
798 | ||
799 | err: | |
800 | return err; | |
801 | } | |
802 | ||
5c4e6f13 PO |
803 | /* |
804 | * Host is being removed. Free up the current card. | |
805 | */ | |
806 | static void mmc_sdio_remove(struct mmc_host *host) | |
807 | { | |
e29a7d73 PO |
808 | int i; |
809 | ||
e29a7d73 PO |
810 | for (i = 0;i < host->card->sdio_funcs;i++) { |
811 | if (host->card->sdio_func[i]) { | |
812 | sdio_remove_func(host->card->sdio_func[i]); | |
813 | host->card->sdio_func[i] = NULL; | |
814 | } | |
815 | } | |
816 | ||
5c4e6f13 PO |
817 | mmc_remove_card(host->card); |
818 | host->card = NULL; | |
819 | } | |
820 | ||
d3049504 AH |
821 | /* |
822 | * Card detection - card is alive. | |
823 | */ | |
824 | static int mmc_sdio_alive(struct mmc_host *host) | |
825 | { | |
826 | return mmc_select_card(host->card); | |
827 | } | |
828 | ||
5c4e6f13 PO |
829 | /* |
830 | * Card detection callback from host. | |
831 | */ | |
832 | static void mmc_sdio_detect(struct mmc_host *host) | |
833 | { | |
834 | int err; | |
835 | ||
87973ba2 | 836 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
837 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
838 | err = pm_runtime_get_sync(&host->card->dev); | |
3bffb800 LF |
839 | if (err < 0) { |
840 | pm_runtime_put_noidle(&host->card->dev); | |
ed919b01 | 841 | goto out; |
3bffb800 | 842 | } |
ed919b01 | 843 | } |
87973ba2 | 844 | |
5c4e6f13 PO |
845 | mmc_claim_host(host); |
846 | ||
847 | /* | |
848 | * Just check if our card has been removed. | |
849 | */ | |
d3049504 | 850 | err = _mmc_detect_card_removed(host); |
5c4e6f13 PO |
851 | |
852 | mmc_release_host(host); | |
853 | ||
4d0812c3 OBC |
854 | /* |
855 | * Tell PM core it's OK to power off the card now. | |
856 | * | |
857 | * The _sync variant is used in order to ensure that the card | |
858 | * is left powered off in case an error occurred, and the card | |
859 | * is going to be removed. | |
860 | * | |
861 | * Since there is no specific reason to believe a new user | |
862 | * is about to show up at this point, the _sync variant is | |
863 | * desirable anyway. | |
864 | */ | |
ed919b01 OBC |
865 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
866 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 867 | |
87973ba2 | 868 | out: |
5c4e6f13 PO |
869 | if (err) { |
870 | mmc_sdio_remove(host); | |
871 | ||
872 | mmc_claim_host(host); | |
873 | mmc_detach_bus(host); | |
7f7e4129 | 874 | mmc_power_off(host); |
5c4e6f13 PO |
875 | mmc_release_host(host); |
876 | } | |
877 | } | |
878 | ||
17d33e14 | 879 | /* |
810caddb | 880 | * SDIO pre_suspend. We need to suspend all functions separately. |
17d33e14 NP |
881 | * Therefore all registered functions must have drivers with suspend |
882 | * and resume methods. Failing that we simply remove the whole card. | |
883 | */ | |
810caddb | 884 | static int mmc_sdio_pre_suspend(struct mmc_host *host) |
17d33e14 | 885 | { |
95cdfb72 | 886 | int i, err = 0; |
17d33e14 | 887 | |
17d33e14 NP |
888 | for (i = 0; i < host->card->sdio_funcs; i++) { |
889 | struct sdio_func *func = host->card->sdio_func[i]; | |
890 | if (func && sdio_func_present(func) && func->dev.driver) { | |
891 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
892 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
893 | /* force removal of entire card in that case */ |
894 | err = -ENOSYS; | |
810caddb UH |
895 | break; |
896 | } | |
897 | } | |
898 | } | |
899 | ||
900 | return err; | |
901 | } | |
902 | ||
903 | /* | |
904 | * SDIO suspend. Suspend all functions separately. | |
905 | */ | |
906 | static int mmc_sdio_suspend(struct mmc_host *host) | |
907 | { | |
8d1ffc8c UH |
908 | mmc_claim_host(host); |
909 | ||
910 | if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) | |
6b5eda36 | 911 | sdio_disable_wide(host->card); |
6b5eda36 | 912 | |
79d5a65a | 913 | if (!mmc_card_keep_power(host)) { |
74590263 | 914 | mmc_power_off(host); |
79d5a65a AH |
915 | } else if (host->retune_period) { |
916 | mmc_retune_timer_stop(host); | |
917 | mmc_retune_needed(host); | |
918 | } | |
74590263 | 919 | |
8d1ffc8c UH |
920 | mmc_release_host(host); |
921 | ||
573185cc | 922 | return 0; |
17d33e14 NP |
923 | } |
924 | ||
95cdfb72 | 925 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 926 | { |
573185cc | 927 | int err = 0; |
17d33e14 | 928 | |
95cdfb72 | 929 | /* Basic card reinitialization. */ |
17d33e14 | 930 | mmc_claim_host(host); |
080bc977 | 931 | |
74590263 UH |
932 | /* Restore power if needed */ |
933 | if (!mmc_card_keep_power(host)) { | |
69041150 | 934 | mmc_power_up(host, host->card->ocr); |
74590263 UH |
935 | /* |
936 | * Tell runtime PM core we just powered up the card, | |
937 | * since it still believes the card is powered off. | |
938 | * Note that currently runtime PM is only enabled | |
939 | * for SDIO cards that are MMC_CAP_POWER_OFF_CARD | |
940 | */ | |
941 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { | |
942 | pm_runtime_disable(&host->card->dev); | |
943 | pm_runtime_set_active(&host->card->dev); | |
944 | pm_runtime_enable(&host->card->dev); | |
945 | } | |
946 | } | |
947 | ||
080bc977 | 948 | /* No need to reinitialize powered-resumed nonremovable cards */ |
51aa66a5 SJ |
949 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
950 | sdio_reset(host); | |
951 | mmc_go_idle(host); | |
006fc51c N |
952 | mmc_send_if_cond(host, host->card->ocr); |
953 | err = mmc_send_io_op_cond(host, 0, NULL); | |
954 | if (!err) | |
955 | err = mmc_sdio_init_card(host, host->card->ocr, | |
956 | host->card, | |
957 | mmc_card_keep_power(host)); | |
51aa66a5 | 958 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
080bc977 OBC |
959 | /* We may have switched to 1-bit mode during suspend */ |
960 | err = sdio_enable_4bit_bus(host->card); | |
080bc977 OBC |
961 | } |
962 | ||
dea67c4e | 963 | if (!err && host->sdio_irqs) { |
9eadcc05 | 964 | if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) |
dea67c4e | 965 | wake_up_process(host->sdio_irq_thread); |
9eadcc05 | 966 | else if (host->caps & MMC_CAP_SDIO_IRQ) |
dea67c4e | 967 | host->ops->enable_sdio_irq(host, 1); |
dea67c4e FZ |
968 | } |
969 | ||
17d33e14 | 970 | mmc_release_host(host); |
17d33e14 | 971 | |
74590263 | 972 | host->pm_flags &= ~MMC_PM_KEEP_POWER; |
95cdfb72 | 973 | return err; |
17d33e14 | 974 | } |
5c4e6f13 | 975 | |
d3fe37b1 OBC |
976 | static int mmc_sdio_power_restore(struct mmc_host *host) |
977 | { | |
978 | int ret; | |
979 | ||
d3fe37b1 | 980 | mmc_claim_host(host); |
c6e633ad DD |
981 | |
982 | /* | |
983 | * Reset the card by performing the same steps that are taken by | |
984 | * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe. | |
985 | * | |
986 | * sdio_reset() is technically not needed. Having just powered up the | |
987 | * hardware, it should already be in reset state. However, some | |
988 | * platforms (such as SD8686 on OLPC) do not instantly cut power, | |
989 | * meaning that a reset is required when restoring power soon after | |
990 | * powering off. It is harmless in other cases. | |
991 | * | |
992 | * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec, | |
993 | * is not necessary for non-removable cards. However, it is required | |
994 | * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and | |
995 | * harmless in other situations. | |
996 | * | |
c6e633ad | 997 | */ |
e7747475 | 998 | |
c6e633ad DD |
999 | sdio_reset(host); |
1000 | mmc_go_idle(host); | |
59b6c9e0 | 1001 | mmc_send_if_cond(host, host->card->ocr); |
c6e633ad | 1002 | |
ce69d37b | 1003 | ret = mmc_send_io_op_cond(host, 0, NULL); |
c6e633ad DD |
1004 | if (ret) |
1005 | goto out; | |
1006 | ||
ce69d37b | 1007 | ret = mmc_sdio_init_card(host, host->card->ocr, host->card, |
a5e9425d | 1008 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
1009 | if (!ret && host->sdio_irqs) |
1010 | mmc_signal_sdio_irq(host); | |
c6e633ad DD |
1011 | |
1012 | out: | |
d3fe37b1 OBC |
1013 | mmc_release_host(host); |
1014 | ||
1015 | return ret; | |
1016 | } | |
1017 | ||
12d01d0b UH |
1018 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
1019 | { | |
1020 | /* No references to the card, cut the power to it. */ | |
8d1ffc8c | 1021 | mmc_claim_host(host); |
12d01d0b | 1022 | mmc_power_off(host); |
8d1ffc8c UH |
1023 | mmc_release_host(host); |
1024 | ||
12d01d0b UH |
1025 | return 0; |
1026 | } | |
1027 | ||
1028 | static int mmc_sdio_runtime_resume(struct mmc_host *host) | |
1029 | { | |
8d1ffc8c UH |
1030 | int ret; |
1031 | ||
12d01d0b | 1032 | /* Restore power and re-initialize. */ |
8d1ffc8c | 1033 | mmc_claim_host(host); |
69041150 | 1034 | mmc_power_up(host, host->card->ocr); |
8d1ffc8c UH |
1035 | ret = mmc_sdio_power_restore(host); |
1036 | mmc_release_host(host); | |
1037 | ||
1038 | return ret; | |
12d01d0b UH |
1039 | } |
1040 | ||
1fb654fd AF |
1041 | static int mmc_sdio_reset(struct mmc_host *host) |
1042 | { | |
1043 | mmc_power_cycle(host, host->card->ocr); | |
1044 | return mmc_sdio_power_restore(host); | |
1045 | } | |
1046 | ||
5c4e6f13 PO |
1047 | static const struct mmc_bus_ops mmc_sdio_ops = { |
1048 | .remove = mmc_sdio_remove, | |
1049 | .detect = mmc_sdio_detect, | |
810caddb | 1050 | .pre_suspend = mmc_sdio_pre_suspend, |
17d33e14 NP |
1051 | .suspend = mmc_sdio_suspend, |
1052 | .resume = mmc_sdio_resume, | |
12d01d0b UH |
1053 | .runtime_suspend = mmc_sdio_runtime_suspend, |
1054 | .runtime_resume = mmc_sdio_runtime_resume, | |
d3fe37b1 | 1055 | .power_restore = mmc_sdio_power_restore, |
d3049504 | 1056 | .alive = mmc_sdio_alive, |
1fb654fd | 1057 | .reset = mmc_sdio_reset, |
5c4e6f13 PO |
1058 | }; |
1059 | ||
1060 | ||
1061 | /* | |
1062 | * Starting point for SDIO card init. | |
1063 | */ | |
807e8e40 | 1064 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 1065 | { |
807e8e40 | 1066 | int err, i, funcs; |
69041150 | 1067 | u32 ocr, rocr; |
5c4e6f13 PO |
1068 | struct mmc_card *card; |
1069 | ||
d84075c8 | 1070 | WARN_ON(!host->claimed); |
5c4e6f13 | 1071 | |
807e8e40 AR |
1072 | err = mmc_send_io_op_cond(host, 0, &ocr); |
1073 | if (err) | |
1074 | return err; | |
1075 | ||
5c4e6f13 | 1076 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
1077 | if (host->ocr_avail_sdio) |
1078 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 | 1079 | |
5c4e6f13 | 1080 | |
69041150 | 1081 | rocr = mmc_select_voltage(host, ocr); |
5c4e6f13 PO |
1082 | |
1083 | /* | |
1084 | * Can we support the voltage(s) of the card(s)? | |
1085 | */ | |
69041150 | 1086 | if (!rocr) { |
5c4e6f13 PO |
1087 | err = -EINVAL; |
1088 | goto err; | |
1089 | } | |
1090 | ||
1091 | /* | |
17d33e14 | 1092 | * Detect and init the card. |
5c4e6f13 | 1093 | */ |
69041150 | 1094 | err = mmc_sdio_init_card(host, rocr, NULL, 0); |
ec2ed700 UH |
1095 | if (err) |
1096 | goto err; | |
1097 | ||
17d33e14 | 1098 | card = host->card; |
af517150 | 1099 | |
81968561 | 1100 | /* |
ed919b01 | 1101 | * Enable runtime PM only if supported by host+card+board |
81968561 | 1102 | */ |
ed919b01 OBC |
1103 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
1104 | /* | |
1105 | * Let runtime PM core know our card is active | |
1106 | */ | |
1107 | err = pm_runtime_set_active(&card->dev); | |
1108 | if (err) | |
1109 | goto remove; | |
81968561 | 1110 | |
ed919b01 OBC |
1111 | /* |
1112 | * Enable runtime PM for this card | |
1113 | */ | |
1114 | pm_runtime_enable(&card->dev); | |
1115 | } | |
81968561 | 1116 | |
5c4e6f13 PO |
1117 | /* |
1118 | * The number of functions on the card is encoded inside | |
1119 | * the ocr. | |
1120 | */ | |
e8812793 MF |
1121 | funcs = (ocr & 0x70000000) >> 28; |
1122 | card->sdio_funcs = 0; | |
4ff6471c | 1123 | |
e29a7d73 PO |
1124 | /* |
1125 | * Initialize (but don't add) all present functions. | |
1126 | */ | |
e8812793 | 1127 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
1128 | err = sdio_init_func(host->card, i + 1); |
1129 | if (err) | |
1130 | goto remove; | |
40bba0c1 OBC |
1131 | |
1132 | /* | |
ed919b01 | 1133 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 1134 | */ |
ed919b01 OBC |
1135 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1136 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 1137 | } |
5c4e6f13 | 1138 | |
e29a7d73 PO |
1139 | /* |
1140 | * First add the card to the driver model... | |
1141 | */ | |
807e8e40 | 1142 | mmc_release_host(host); |
5c4e6f13 PO |
1143 | err = mmc_add_card(host->card); |
1144 | if (err) | |
e29a7d73 PO |
1145 | goto remove_added; |
1146 | ||
1147 | /* | |
1148 | * ...then the SDIO functions. | |
1149 | */ | |
1150 | for (i = 0;i < funcs;i++) { | |
1151 | err = sdio_add_func(host->card->sdio_func[i]); | |
1152 | if (err) | |
1153 | goto remove_added; | |
1154 | } | |
5c4e6f13 | 1155 | |
34497913 | 1156 | mmc_claim_host(host); |
5c4e6f13 PO |
1157 | return 0; |
1158 | ||
e29a7d73 PO |
1159 | |
1160 | remove_added: | |
1161 | /* Remove without lock if the device has been added. */ | |
1162 | mmc_sdio_remove(host); | |
5c4e6f13 | 1163 | mmc_claim_host(host); |
e29a7d73 PO |
1164 | remove: |
1165 | /* And with lock if it hasn't been added. */ | |
807e8e40 | 1166 | mmc_release_host(host); |
e29a7d73 PO |
1167 | if (host->card) |
1168 | mmc_sdio_remove(host); | |
807e8e40 | 1169 | mmc_claim_host(host); |
5c4e6f13 PO |
1170 | err: |
1171 | mmc_detach_bus(host); | |
5c4e6f13 | 1172 | |
a3c76eb9 | 1173 | pr_err("%s: error %d whilst initialising SDIO card\n", |
5c4e6f13 PO |
1174 | mmc_hostname(host), err); |
1175 | ||
1176 | return err; | |
1177 | } | |
1178 |