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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 | ||
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 | { | |
fa021cef | 405 | int card_drv_type, drive_strength, drv_type; |
a303c531 PR |
406 | unsigned char card_strength; |
407 | int err; | |
408 | ||
3853a042 AH |
409 | card->drive_strength = 0; |
410 | ||
fa021cef | 411 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
a303c531 | 412 | |
e23350b3 AH |
413 | drive_strength = mmc_select_drive_strength(card, |
414 | card->sw_caps.uhs_max_dtr, | |
415 | card_drv_type, &drv_type); | |
a303c531 | 416 | |
b4f30a17 AH |
417 | if (drive_strength) { |
418 | /* if error just use default for drive strength B */ | |
419 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0, | |
420 | &card_strength); | |
421 | if (err) | |
422 | return; | |
a303c531 | 423 | |
b4f30a17 AH |
424 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); |
425 | card_strength |= host_drive_to_sdio_drive(drive_strength); | |
a303c531 | 426 | |
b4f30a17 AH |
427 | /* if error default to drive strength B */ |
428 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH, | |
429 | card_strength, NULL); | |
430 | if (err) | |
431 | return; | |
3853a042 | 432 | card->drive_strength = drive_strength; |
b4f30a17 | 433 | } |
a303c531 | 434 | |
b4f30a17 AH |
435 | if (drv_type) |
436 | mmc_set_driver_type(card->host, drv_type); | |
a303c531 PR |
437 | } |
438 | ||
439 | ||
440 | static int sdio_set_bus_speed_mode(struct mmc_card *card) | |
441 | { | |
442 | unsigned int bus_speed, timing; | |
443 | int err; | |
444 | unsigned char speed; | |
445 | ||
446 | /* | |
447 | * If the host doesn't support any of the UHS-I modes, fallback on | |
448 | * default speed. | |
449 | */ | |
41875e38 | 450 | if (!mmc_host_uhs(card->host)) |
a303c531 PR |
451 | return 0; |
452 | ||
453 | bus_speed = SDIO_SPEED_SDR12; | |
454 | timing = MMC_TIMING_UHS_SDR12; | |
455 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
456 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
457 | bus_speed = SDIO_SPEED_SDR104; | |
458 | timing = MMC_TIMING_UHS_SDR104; | |
459 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
77e2ff08 | 460 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
a303c531 PR |
461 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
462 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
463 | bus_speed = SDIO_SPEED_DDR50; | |
464 | timing = MMC_TIMING_UHS_DDR50; | |
465 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
77e2ff08 | 466 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
a303c531 PR |
467 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
468 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
469 | SD_MODE_UHS_SDR50)) { | |
470 | bus_speed = SDIO_SPEED_SDR50; | |
471 | timing = MMC_TIMING_UHS_SDR50; | |
472 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
77e2ff08 | 473 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
a303c531 PR |
474 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
475 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
476 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
477 | bus_speed = SDIO_SPEED_SDR25; | |
478 | timing = MMC_TIMING_UHS_SDR25; | |
479 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
77e2ff08 | 480 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
a303c531 PR |
481 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
482 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
483 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
484 | SD_MODE_UHS_SDR12)) { | |
485 | bus_speed = SDIO_SPEED_SDR12; | |
486 | timing = MMC_TIMING_UHS_SDR12; | |
487 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
77e2ff08 | 488 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
a303c531 PR |
489 | } |
490 | ||
491 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
492 | if (err) | |
493 | return err; | |
494 | ||
495 | speed &= ~SDIO_SPEED_BSS_MASK; | |
496 | speed |= bus_speed; | |
497 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
498 | if (err) | |
499 | return err; | |
500 | ||
501 | if (bus_speed) { | |
502 | mmc_set_timing(card->host, timing); | |
503 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
504 | } | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | /* | |
510 | * UHS-I specific initialization procedure | |
511 | */ | |
512 | static int mmc_sdio_init_uhs_card(struct mmc_card *card) | |
513 | { | |
514 | int err; | |
515 | ||
516 | if (!card->scr.sda_spec3) | |
517 | return 0; | |
518 | ||
519 | /* | |
520 | * Switch to wider bus (if supported). | |
521 | */ | |
303dbedc | 522 | if (card->host->caps & MMC_CAP_4_BIT_DATA) |
a303c531 | 523 | err = sdio_enable_4bit_bus(card); |
a303c531 PR |
524 | |
525 | /* Set the driver strength for the card */ | |
526 | sdio_select_driver_type(card); | |
527 | ||
528 | /* Set bus speed mode of the card */ | |
529 | err = sdio_set_bus_speed_mode(card); | |
530 | if (err) | |
531 | goto out; | |
532 | ||
810e08ee FS |
533 | /* |
534 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
535 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
536 | */ | |
63e415c6 AH |
537 | if (!mmc_host_is_spi(card->host) && |
538 | ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) || | |
539 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104))) | |
540 | err = mmc_execute_tuning(card); | |
a303c531 | 541 | out: |
a303c531 PR |
542 | return err; |
543 | } | |
544 | ||
17d33e14 NP |
545 | /* |
546 | * Handle the detection and initialisation of a card. | |
547 | * | |
548 | * In the case of a resume, "oldcard" will contain the card | |
549 | * we're trying to reinitialise. | |
550 | */ | |
551 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 552 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
553 | { |
554 | struct mmc_card *card; | |
555 | int err; | |
0797e5f1 | 556 | int retries = 10; |
db4a0d05 | 557 | u32 rocr = 0; |
69041150 | 558 | u32 ocr_card = ocr; |
17d33e14 NP |
559 | |
560 | BUG_ON(!host); | |
561 | WARN_ON(!host->claimed); | |
562 | ||
db4a0d05 UH |
563 | /* to query card if 1.8V signalling is supported */ |
564 | if (mmc_host_uhs(host)) | |
565 | ocr |= R4_18V_PRESENT; | |
566 | ||
0797e5f1 JR |
567 | try_again: |
568 | if (!retries) { | |
6606110d | 569 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
0797e5f1 | 570 | ocr &= ~R4_18V_PRESENT; |
0797e5f1 JR |
571 | } |
572 | ||
17d33e14 NP |
573 | /* |
574 | * Inform the card of the voltage | |
575 | */ | |
3bca4cf7 | 576 | if (!powered_resume) { |
db4a0d05 | 577 | err = mmc_send_io_op_cond(host, ocr, &rocr); |
3bca4cf7 CB |
578 | if (err) |
579 | goto err; | |
580 | } | |
17d33e14 NP |
581 | |
582 | /* | |
583 | * For SPI, enable CRC as appropriate. | |
584 | */ | |
585 | if (mmc_host_is_spi(host)) { | |
586 | err = mmc_spi_set_crc(host, use_spi_crc); | |
587 | if (err) | |
588 | goto err; | |
589 | } | |
590 | ||
591 | /* | |
592 | * Allocate card structure. | |
593 | */ | |
594 | card = mmc_alloc_card(host, NULL); | |
595 | if (IS_ERR(card)) { | |
596 | err = PTR_ERR(card); | |
597 | goto err; | |
598 | } | |
599 | ||
db4a0d05 UH |
600 | if ((rocr & R4_MEMORY_PRESENT) && |
601 | mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) { | |
7310ece8 MM |
602 | card->type = MMC_TYPE_SD_COMBO; |
603 | ||
604 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
605 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
606 | mmc_remove_card(card); | |
607 | return -ENOENT; | |
608 | } | |
609 | } else { | |
610 | card->type = MMC_TYPE_SDIO; | |
611 | ||
612 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
613 | mmc_remove_card(card); | |
614 | return -ENOENT; | |
615 | } | |
616 | } | |
17d33e14 | 617 | |
3fcb027d DM |
618 | /* |
619 | * Call the optional HC's init_card function to handle quirks. | |
620 | */ | |
621 | if (host->ops->init_card) | |
622 | host->ops->init_card(host, card); | |
623 | ||
a303c531 PR |
624 | /* |
625 | * If the host and card support UHS-I mode request the card | |
626 | * to switch to 1.8V signaling level. No 1.8v signalling if | |
7122bbb0 | 627 | * UHS mode is not enabled to maintain compatibility and some |
a303c531 PR |
628 | * systems that claim 1.8v signalling in fact do not support |
629 | * it. | |
630 | */ | |
db4a0d05 | 631 | if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) { |
0f791fda | 632 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
d9bfbb95 | 633 | ocr_card); |
0797e5f1 JR |
634 | if (err == -EAGAIN) { |
635 | sdio_reset(host); | |
636 | mmc_go_idle(host); | |
637 | mmc_send_if_cond(host, host->ocr_avail); | |
638 | mmc_remove_card(card); | |
639 | retries--; | |
640 | goto try_again; | |
641 | } else if (err) { | |
a303c531 | 642 | ocr &= ~R4_18V_PRESENT; |
a303c531 PR |
643 | } |
644 | err = 0; | |
645 | } else { | |
646 | ocr &= ~R4_18V_PRESENT; | |
a303c531 PR |
647 | } |
648 | ||
17d33e14 NP |
649 | /* |
650 | * For native busses: set card RCA and quit open drain mode. | |
651 | */ | |
3bca4cf7 | 652 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
653 | err = mmc_send_relative_addr(host, &card->rca); |
654 | if (err) | |
655 | goto remove; | |
656 | ||
0aab3995 SNX |
657 | /* |
658 | * Update oldcard with the new RCA received from the SDIO | |
659 | * device -- we're doing this so that it's updated in the | |
660 | * "card" struct when oldcard overwrites that later. | |
661 | */ | |
662 | if (oldcard) | |
663 | oldcard->rca = card->rca; | |
17d33e14 NP |
664 | } |
665 | ||
7310ece8 MM |
666 | /* |
667 | * Read CSD, before selecting the card | |
668 | */ | |
669 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
670 | err = mmc_sd_get_csd(host, card); | |
671 | if (err) | |
672 | return err; | |
673 | ||
674 | mmc_decode_cid(card); | |
675 | } | |
676 | ||
17d33e14 NP |
677 | /* |
678 | * Select card, as all following commands rely on that. | |
679 | */ | |
3bca4cf7 | 680 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
681 | err = mmc_select_card(card); |
682 | if (err) | |
683 | goto remove; | |
684 | } | |
685 | ||
6f51be3d GI |
686 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
687 | /* | |
688 | * This is non-standard SDIO device, meaning it doesn't | |
689 | * have any CIA (Common I/O area) registers present. | |
690 | * It's host's responsibility to fill cccr and cis | |
691 | * structures in init_card(). | |
692 | */ | |
693 | mmc_set_clock(host, card->cis.max_dtr); | |
694 | ||
695 | if (card->cccr.high_speed) { | |
6f51be3d GI |
696 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
697 | } | |
698 | ||
699 | goto finish; | |
700 | } | |
701 | ||
17d33e14 NP |
702 | /* |
703 | * Read the common registers. | |
704 | */ | |
2d0d68f5 | 705 | err = sdio_read_cccr(card, ocr); |
17d33e14 NP |
706 | if (err) |
707 | goto remove; | |
708 | ||
709 | /* | |
710 | * Read the common CIS tuples. | |
711 | */ | |
712 | err = sdio_read_common_cis(card); | |
713 | if (err) | |
714 | goto remove; | |
715 | ||
716 | if (oldcard) { | |
717 | int same = (card->cis.vendor == oldcard->cis.vendor && | |
718 | card->cis.device == oldcard->cis.device); | |
719 | mmc_remove_card(card); | |
7310ece8 MM |
720 | if (!same) |
721 | return -ENOENT; | |
722 | ||
17d33e14 NP |
723 | card = oldcard; |
724 | } | |
69041150 | 725 | card->ocr = ocr_card; |
32780cd1 | 726 | mmc_fixup_device(card, NULL); |
17d33e14 | 727 | |
7310ece8 MM |
728 | if (card->type == MMC_TYPE_SD_COMBO) { |
729 | err = mmc_sd_setup_card(host, card, oldcard != NULL); | |
730 | /* handle as SDIO-only card if memory init failed */ | |
731 | if (err) { | |
732 | mmc_go_idle(host); | |
733 | if (mmc_host_is_spi(host)) | |
734 | /* should not fail, as it worked previously */ | |
735 | mmc_spi_set_crc(host, use_spi_crc); | |
736 | card->type = MMC_TYPE_SDIO; | |
737 | } else | |
738 | card->dev.type = &sd_type; | |
739 | } | |
740 | ||
741 | /* | |
742 | * If needed, disconnect card detection pull-up resistor. | |
743 | */ | |
744 | err = sdio_disable_cd(card); | |
745 | if (err) | |
746 | goto remove; | |
747 | ||
a303c531 PR |
748 | /* Initialization sequence for UHS-I cards */ |
749 | /* Only if card supports 1.8v and UHS signaling */ | |
750 | if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) { | |
751 | err = mmc_sdio_init_uhs_card(card); | |
752 | if (err) | |
753 | goto remove; | |
a303c531 PR |
754 | } else { |
755 | /* | |
756 | * Switch to high-speed (if supported). | |
757 | */ | |
758 | err = sdio_enable_hs(card); | |
759 | if (err > 0) | |
cdc99179 | 760 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
a303c531 PR |
761 | else if (err) |
762 | goto remove; | |
17d33e14 | 763 | |
a303c531 PR |
764 | /* |
765 | * Change to the card's maximum speed. | |
766 | */ | |
767 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); | |
17d33e14 | 768 | |
a303c531 PR |
769 | /* |
770 | * Switch to wider bus (if supported). | |
771 | */ | |
772 | err = sdio_enable_4bit_bus(card); | |
303dbedc | 773 | if (err) |
a303c531 PR |
774 | goto remove; |
775 | } | |
6f51be3d | 776 | finish: |
17d33e14 NP |
777 | if (!oldcard) |
778 | host->card = card; | |
779 | return 0; | |
780 | ||
781 | remove: | |
782 | if (!oldcard) | |
783 | mmc_remove_card(card); | |
784 | ||
785 | err: | |
786 | return err; | |
787 | } | |
788 | ||
5c4e6f13 PO |
789 | /* |
790 | * Host is being removed. Free up the current card. | |
791 | */ | |
792 | static void mmc_sdio_remove(struct mmc_host *host) | |
793 | { | |
e29a7d73 PO |
794 | int i; |
795 | ||
5c4e6f13 PO |
796 | BUG_ON(!host); |
797 | BUG_ON(!host->card); | |
798 | ||
e29a7d73 PO |
799 | for (i = 0;i < host->card->sdio_funcs;i++) { |
800 | if (host->card->sdio_func[i]) { | |
801 | sdio_remove_func(host->card->sdio_func[i]); | |
802 | host->card->sdio_func[i] = NULL; | |
803 | } | |
804 | } | |
805 | ||
5c4e6f13 PO |
806 | mmc_remove_card(host->card); |
807 | host->card = NULL; | |
808 | } | |
809 | ||
d3049504 AH |
810 | /* |
811 | * Card detection - card is alive. | |
812 | */ | |
813 | static int mmc_sdio_alive(struct mmc_host *host) | |
814 | { | |
815 | return mmc_select_card(host->card); | |
816 | } | |
817 | ||
5c4e6f13 PO |
818 | /* |
819 | * Card detection callback from host. | |
820 | */ | |
821 | static void mmc_sdio_detect(struct mmc_host *host) | |
822 | { | |
823 | int err; | |
824 | ||
825 | BUG_ON(!host); | |
826 | BUG_ON(!host->card); | |
827 | ||
87973ba2 | 828 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
829 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
830 | err = pm_runtime_get_sync(&host->card->dev); | |
3bffb800 LF |
831 | if (err < 0) { |
832 | pm_runtime_put_noidle(&host->card->dev); | |
ed919b01 | 833 | goto out; |
3bffb800 | 834 | } |
ed919b01 | 835 | } |
87973ba2 | 836 | |
5c4e6f13 PO |
837 | mmc_claim_host(host); |
838 | ||
839 | /* | |
840 | * Just check if our card has been removed. | |
841 | */ | |
d3049504 | 842 | err = _mmc_detect_card_removed(host); |
5c4e6f13 PO |
843 | |
844 | mmc_release_host(host); | |
845 | ||
4d0812c3 OBC |
846 | /* |
847 | * Tell PM core it's OK to power off the card now. | |
848 | * | |
849 | * The _sync variant is used in order to ensure that the card | |
850 | * is left powered off in case an error occurred, and the card | |
851 | * is going to be removed. | |
852 | * | |
853 | * Since there is no specific reason to believe a new user | |
854 | * is about to show up at this point, the _sync variant is | |
855 | * desirable anyway. | |
856 | */ | |
ed919b01 OBC |
857 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
858 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 859 | |
87973ba2 | 860 | out: |
5c4e6f13 PO |
861 | if (err) { |
862 | mmc_sdio_remove(host); | |
863 | ||
864 | mmc_claim_host(host); | |
865 | mmc_detach_bus(host); | |
7f7e4129 | 866 | mmc_power_off(host); |
5c4e6f13 PO |
867 | mmc_release_host(host); |
868 | } | |
869 | } | |
870 | ||
17d33e14 | 871 | /* |
810caddb | 872 | * SDIO pre_suspend. We need to suspend all functions separately. |
17d33e14 NP |
873 | * Therefore all registered functions must have drivers with suspend |
874 | * and resume methods. Failing that we simply remove the whole card. | |
875 | */ | |
810caddb | 876 | static int mmc_sdio_pre_suspend(struct mmc_host *host) |
17d33e14 | 877 | { |
95cdfb72 | 878 | int i, err = 0; |
17d33e14 | 879 | |
17d33e14 NP |
880 | for (i = 0; i < host->card->sdio_funcs; i++) { |
881 | struct sdio_func *func = host->card->sdio_func[i]; | |
882 | if (func && sdio_func_present(func) && func->dev.driver) { | |
883 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
884 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
885 | /* force removal of entire card in that case */ |
886 | err = -ENOSYS; | |
810caddb UH |
887 | break; |
888 | } | |
889 | } | |
890 | } | |
891 | ||
892 | return err; | |
893 | } | |
894 | ||
895 | /* | |
896 | * SDIO suspend. Suspend all functions separately. | |
897 | */ | |
898 | static int mmc_sdio_suspend(struct mmc_host *host) | |
899 | { | |
8d1ffc8c UH |
900 | mmc_claim_host(host); |
901 | ||
902 | if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) | |
6b5eda36 | 903 | sdio_disable_wide(host->card); |
6b5eda36 | 904 | |
79d5a65a | 905 | if (!mmc_card_keep_power(host)) { |
74590263 | 906 | mmc_power_off(host); |
79d5a65a AH |
907 | } else if (host->retune_period) { |
908 | mmc_retune_timer_stop(host); | |
909 | mmc_retune_needed(host); | |
910 | } | |
74590263 | 911 | |
8d1ffc8c UH |
912 | mmc_release_host(host); |
913 | ||
573185cc | 914 | return 0; |
17d33e14 NP |
915 | } |
916 | ||
95cdfb72 | 917 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 918 | { |
573185cc | 919 | int err = 0; |
17d33e14 NP |
920 | |
921 | BUG_ON(!host); | |
922 | BUG_ON(!host->card); | |
923 | ||
95cdfb72 | 924 | /* Basic card reinitialization. */ |
17d33e14 | 925 | mmc_claim_host(host); |
080bc977 | 926 | |
74590263 UH |
927 | /* Restore power if needed */ |
928 | if (!mmc_card_keep_power(host)) { | |
69041150 | 929 | mmc_power_up(host, host->card->ocr); |
74590263 UH |
930 | /* |
931 | * Tell runtime PM core we just powered up the card, | |
932 | * since it still believes the card is powered off. | |
933 | * Note that currently runtime PM is only enabled | |
934 | * for SDIO cards that are MMC_CAP_POWER_OFF_CARD | |
935 | */ | |
936 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { | |
937 | pm_runtime_disable(&host->card->dev); | |
938 | pm_runtime_set_active(&host->card->dev); | |
939 | pm_runtime_enable(&host->card->dev); | |
940 | } | |
941 | } | |
942 | ||
080bc977 | 943 | /* No need to reinitialize powered-resumed nonremovable cards */ |
51aa66a5 SJ |
944 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
945 | sdio_reset(host); | |
946 | mmc_go_idle(host); | |
006fc51c N |
947 | mmc_send_if_cond(host, host->card->ocr); |
948 | err = mmc_send_io_op_cond(host, 0, NULL); | |
949 | if (!err) | |
950 | err = mmc_sdio_init_card(host, host->card->ocr, | |
951 | host->card, | |
952 | mmc_card_keep_power(host)); | |
51aa66a5 | 953 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
080bc977 OBC |
954 | /* We may have switched to 1-bit mode during suspend */ |
955 | err = sdio_enable_4bit_bus(host->card); | |
080bc977 OBC |
956 | } |
957 | ||
dea67c4e | 958 | if (!err && host->sdio_irqs) { |
9eadcc05 | 959 | if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) |
dea67c4e | 960 | wake_up_process(host->sdio_irq_thread); |
9eadcc05 | 961 | else if (host->caps & MMC_CAP_SDIO_IRQ) |
dea67c4e | 962 | host->ops->enable_sdio_irq(host, 1); |
dea67c4e FZ |
963 | } |
964 | ||
17d33e14 | 965 | mmc_release_host(host); |
17d33e14 | 966 | |
74590263 | 967 | host->pm_flags &= ~MMC_PM_KEEP_POWER; |
95cdfb72 | 968 | return err; |
17d33e14 | 969 | } |
5c4e6f13 | 970 | |
d3fe37b1 OBC |
971 | static int mmc_sdio_power_restore(struct mmc_host *host) |
972 | { | |
973 | int ret; | |
974 | ||
975 | BUG_ON(!host); | |
976 | BUG_ON(!host->card); | |
977 | ||
978 | mmc_claim_host(host); | |
c6e633ad DD |
979 | |
980 | /* | |
981 | * Reset the card by performing the same steps that are taken by | |
982 | * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe. | |
983 | * | |
984 | * sdio_reset() is technically not needed. Having just powered up the | |
985 | * hardware, it should already be in reset state. However, some | |
986 | * platforms (such as SD8686 on OLPC) do not instantly cut power, | |
987 | * meaning that a reset is required when restoring power soon after | |
988 | * powering off. It is harmless in other cases. | |
989 | * | |
990 | * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec, | |
991 | * is not necessary for non-removable cards. However, it is required | |
992 | * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and | |
993 | * harmless in other situations. | |
994 | * | |
c6e633ad | 995 | */ |
e7747475 | 996 | |
c6e633ad DD |
997 | sdio_reset(host); |
998 | mmc_go_idle(host); | |
59b6c9e0 | 999 | mmc_send_if_cond(host, host->card->ocr); |
c6e633ad | 1000 | |
ce69d37b | 1001 | ret = mmc_send_io_op_cond(host, 0, NULL); |
c6e633ad DD |
1002 | if (ret) |
1003 | goto out; | |
1004 | ||
ce69d37b | 1005 | ret = mmc_sdio_init_card(host, host->card->ocr, host->card, |
a5e9425d | 1006 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
1007 | if (!ret && host->sdio_irqs) |
1008 | mmc_signal_sdio_irq(host); | |
c6e633ad DD |
1009 | |
1010 | out: | |
d3fe37b1 OBC |
1011 | mmc_release_host(host); |
1012 | ||
1013 | return ret; | |
1014 | } | |
1015 | ||
12d01d0b UH |
1016 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
1017 | { | |
1018 | /* No references to the card, cut the power to it. */ | |
8d1ffc8c | 1019 | mmc_claim_host(host); |
12d01d0b | 1020 | mmc_power_off(host); |
8d1ffc8c UH |
1021 | mmc_release_host(host); |
1022 | ||
12d01d0b UH |
1023 | return 0; |
1024 | } | |
1025 | ||
1026 | static int mmc_sdio_runtime_resume(struct mmc_host *host) | |
1027 | { | |
8d1ffc8c UH |
1028 | int ret; |
1029 | ||
12d01d0b | 1030 | /* Restore power and re-initialize. */ |
8d1ffc8c | 1031 | mmc_claim_host(host); |
69041150 | 1032 | mmc_power_up(host, host->card->ocr); |
8d1ffc8c UH |
1033 | ret = mmc_sdio_power_restore(host); |
1034 | mmc_release_host(host); | |
1035 | ||
1036 | return ret; | |
12d01d0b UH |
1037 | } |
1038 | ||
1fb654fd AF |
1039 | static int mmc_sdio_reset(struct mmc_host *host) |
1040 | { | |
1041 | mmc_power_cycle(host, host->card->ocr); | |
1042 | return mmc_sdio_power_restore(host); | |
1043 | } | |
1044 | ||
5c4e6f13 PO |
1045 | static const struct mmc_bus_ops mmc_sdio_ops = { |
1046 | .remove = mmc_sdio_remove, | |
1047 | .detect = mmc_sdio_detect, | |
810caddb | 1048 | .pre_suspend = mmc_sdio_pre_suspend, |
17d33e14 NP |
1049 | .suspend = mmc_sdio_suspend, |
1050 | .resume = mmc_sdio_resume, | |
12d01d0b UH |
1051 | .runtime_suspend = mmc_sdio_runtime_suspend, |
1052 | .runtime_resume = mmc_sdio_runtime_resume, | |
d3fe37b1 | 1053 | .power_restore = mmc_sdio_power_restore, |
d3049504 | 1054 | .alive = mmc_sdio_alive, |
1fb654fd | 1055 | .reset = mmc_sdio_reset, |
5c4e6f13 PO |
1056 | }; |
1057 | ||
1058 | ||
1059 | /* | |
1060 | * Starting point for SDIO card init. | |
1061 | */ | |
807e8e40 | 1062 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 1063 | { |
807e8e40 | 1064 | int err, i, funcs; |
69041150 | 1065 | u32 ocr, rocr; |
5c4e6f13 PO |
1066 | struct mmc_card *card; |
1067 | ||
1068 | BUG_ON(!host); | |
d84075c8 | 1069 | WARN_ON(!host->claimed); |
5c4e6f13 | 1070 | |
807e8e40 AR |
1071 | err = mmc_send_io_op_cond(host, 0, &ocr); |
1072 | if (err) | |
1073 | return err; | |
1074 | ||
5c4e6f13 | 1075 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
1076 | if (host->ocr_avail_sdio) |
1077 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 | 1078 | |
5c4e6f13 | 1079 | |
69041150 | 1080 | rocr = mmc_select_voltage(host, ocr); |
5c4e6f13 PO |
1081 | |
1082 | /* | |
1083 | * Can we support the voltage(s) of the card(s)? | |
1084 | */ | |
69041150 | 1085 | if (!rocr) { |
5c4e6f13 PO |
1086 | err = -EINVAL; |
1087 | goto err; | |
1088 | } | |
1089 | ||
1090 | /* | |
17d33e14 | 1091 | * Detect and init the card. |
5c4e6f13 | 1092 | */ |
69041150 | 1093 | err = mmc_sdio_init_card(host, rocr, NULL, 0); |
ec2ed700 UH |
1094 | if (err) |
1095 | goto err; | |
1096 | ||
17d33e14 | 1097 | card = host->card; |
af517150 | 1098 | |
81968561 | 1099 | /* |
ed919b01 | 1100 | * Enable runtime PM only if supported by host+card+board |
81968561 | 1101 | */ |
ed919b01 OBC |
1102 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
1103 | /* | |
1104 | * Let runtime PM core know our card is active | |
1105 | */ | |
1106 | err = pm_runtime_set_active(&card->dev); | |
1107 | if (err) | |
1108 | goto remove; | |
81968561 | 1109 | |
ed919b01 OBC |
1110 | /* |
1111 | * Enable runtime PM for this card | |
1112 | */ | |
1113 | pm_runtime_enable(&card->dev); | |
1114 | } | |
81968561 | 1115 | |
5c4e6f13 PO |
1116 | /* |
1117 | * The number of functions on the card is encoded inside | |
1118 | * the ocr. | |
1119 | */ | |
e8812793 MF |
1120 | funcs = (ocr & 0x70000000) >> 28; |
1121 | card->sdio_funcs = 0; | |
4ff6471c | 1122 | |
e29a7d73 PO |
1123 | /* |
1124 | * Initialize (but don't add) all present functions. | |
1125 | */ | |
e8812793 | 1126 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
1127 | err = sdio_init_func(host->card, i + 1); |
1128 | if (err) | |
1129 | goto remove; | |
40bba0c1 OBC |
1130 | |
1131 | /* | |
ed919b01 | 1132 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 1133 | */ |
ed919b01 OBC |
1134 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1135 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 1136 | } |
5c4e6f13 | 1137 | |
e29a7d73 PO |
1138 | /* |
1139 | * First add the card to the driver model... | |
1140 | */ | |
807e8e40 | 1141 | mmc_release_host(host); |
5c4e6f13 PO |
1142 | err = mmc_add_card(host->card); |
1143 | if (err) | |
e29a7d73 PO |
1144 | goto remove_added; |
1145 | ||
1146 | /* | |
1147 | * ...then the SDIO functions. | |
1148 | */ | |
1149 | for (i = 0;i < funcs;i++) { | |
1150 | err = sdio_add_func(host->card->sdio_func[i]); | |
1151 | if (err) | |
1152 | goto remove_added; | |
1153 | } | |
5c4e6f13 | 1154 | |
34497913 | 1155 | mmc_claim_host(host); |
5c4e6f13 PO |
1156 | return 0; |
1157 | ||
e29a7d73 PO |
1158 | |
1159 | remove_added: | |
1160 | /* Remove without lock if the device has been added. */ | |
1161 | mmc_sdio_remove(host); | |
5c4e6f13 | 1162 | mmc_claim_host(host); |
e29a7d73 PO |
1163 | remove: |
1164 | /* And with lock if it hasn't been added. */ | |
807e8e40 | 1165 | mmc_release_host(host); |
e29a7d73 PO |
1166 | if (host->card) |
1167 | mmc_sdio_remove(host); | |
807e8e40 | 1168 | mmc_claim_host(host); |
5c4e6f13 PO |
1169 | err: |
1170 | mmc_detach_bus(host); | |
5c4e6f13 | 1171 | |
a3c76eb9 | 1172 | pr_err("%s: error %d whilst initialising SDIO card\n", |
5c4e6f13 PO |
1173 | mmc_hostname(host), err); |
1174 | ||
1175 | return err; | |
1176 | } | |
1177 |