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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 YD |
218 | if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED) |
219 | pr_warning("%s: SDIO_CCCR_IF is invalid: 0x%02x\n", | |
220 | mmc_hostname(card->host), ctrl); | |
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) | |
296 | return sdio_enable_wide(card); | |
297 | ||
298 | if ((card->host->caps & MMC_CAP_4_BIT_DATA) && | |
299 | (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { | |
300 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); | |
301 | if (err) | |
302 | return err; | |
303 | } else | |
304 | return 0; | |
305 | ||
306 | err = sdio_enable_wide(card); | |
307 | if (err <= 0) | |
308 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); | |
309 | ||
310 | return err; | |
311 | } | |
312 | ||
313 | ||
d16f5770 PO |
314 | /* |
315 | * Test if the card supports high-speed mode and, if so, switch to it. | |
316 | */ | |
7310ece8 | 317 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
d16f5770 PO |
318 | { |
319 | int ret; | |
320 | u8 speed; | |
321 | ||
322 | if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) | |
323 | return 0; | |
324 | ||
325 | if (!card->cccr.high_speed) | |
326 | return 0; | |
327 | ||
328 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
329 | if (ret) | |
330 | return ret; | |
331 | ||
7310ece8 MM |
332 | if (enable) |
333 | speed |= SDIO_SPEED_EHS; | |
334 | else | |
335 | speed &= ~SDIO_SPEED_EHS; | |
d16f5770 PO |
336 | |
337 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
338 | if (ret) | |
339 | return ret; | |
340 | ||
71578a1e MM |
341 | return 1; |
342 | } | |
d16f5770 | 343 | |
7310ece8 MM |
344 | /* |
345 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. | |
346 | */ | |
347 | static int sdio_enable_hs(struct mmc_card *card) | |
348 | { | |
349 | int ret; | |
350 | ||
351 | ret = mmc_sdio_switch_hs(card, true); | |
352 | if (ret <= 0 || card->type == MMC_TYPE_SDIO) | |
353 | return ret; | |
354 | ||
355 | ret = mmc_sd_switch_hs(card); | |
356 | if (ret <= 0) | |
357 | mmc_sdio_switch_hs(card, false); | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
71578a1e MM |
362 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
363 | { | |
364 | unsigned max_dtr; | |
365 | ||
366 | if (mmc_card_highspeed(card)) { | |
367 | /* | |
368 | * The SDIO specification doesn't mention how | |
369 | * the CIS transfer speed register relates to | |
370 | * high-speed, but it seems that 50 MHz is | |
371 | * mandatory. | |
372 | */ | |
373 | max_dtr = 50000000; | |
374 | } else { | |
375 | max_dtr = card->cis.max_dtr; | |
376 | } | |
377 | ||
7310ece8 MM |
378 | if (card->type == MMC_TYPE_SD_COMBO) |
379 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); | |
380 | ||
71578a1e | 381 | return max_dtr; |
d16f5770 PO |
382 | } |
383 | ||
a303c531 PR |
384 | static unsigned char host_drive_to_sdio_drive(int host_strength) |
385 | { | |
386 | switch (host_strength) { | |
387 | case MMC_SET_DRIVER_TYPE_A: | |
388 | return SDIO_DTSx_SET_TYPE_A; | |
389 | case MMC_SET_DRIVER_TYPE_B: | |
390 | return SDIO_DTSx_SET_TYPE_B; | |
391 | case MMC_SET_DRIVER_TYPE_C: | |
392 | return SDIO_DTSx_SET_TYPE_C; | |
393 | case MMC_SET_DRIVER_TYPE_D: | |
394 | return SDIO_DTSx_SET_TYPE_D; | |
395 | default: | |
396 | return SDIO_DTSx_SET_TYPE_B; | |
397 | } | |
398 | } | |
399 | ||
400 | static void sdio_select_driver_type(struct mmc_card *card) | |
401 | { | |
402 | int host_drv_type = SD_DRIVER_TYPE_B; | |
403 | int card_drv_type = SD_DRIVER_TYPE_B; | |
404 | int drive_strength; | |
405 | unsigned char card_strength; | |
406 | int err; | |
407 | ||
408 | /* | |
409 | * If the host doesn't support any of the Driver Types A,C or D, | |
410 | * or there is no board specific handler then default Driver | |
411 | * Type B is used. | |
412 | */ | |
413 | if (!(card->host->caps & | |
414 | (MMC_CAP_DRIVER_TYPE_A | | |
415 | MMC_CAP_DRIVER_TYPE_C | | |
416 | MMC_CAP_DRIVER_TYPE_D))) | |
417 | return; | |
418 | ||
419 | if (!card->host->ops->select_drive_strength) | |
420 | return; | |
421 | ||
422 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) | |
423 | host_drv_type |= SD_DRIVER_TYPE_A; | |
424 | ||
425 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) | |
426 | host_drv_type |= SD_DRIVER_TYPE_C; | |
427 | ||
428 | if (card->host->caps & MMC_CAP_DRIVER_TYPE_D) | |
429 | host_drv_type |= SD_DRIVER_TYPE_D; | |
430 | ||
431 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A) | |
432 | card_drv_type |= SD_DRIVER_TYPE_A; | |
433 | ||
434 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C) | |
435 | card_drv_type |= SD_DRIVER_TYPE_C; | |
436 | ||
437 | if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D) | |
438 | card_drv_type |= SD_DRIVER_TYPE_D; | |
439 | ||
440 | /* | |
441 | * The drive strength that the hardware can support | |
442 | * depends on the board design. Pass the appropriate | |
443 | * information and let the hardware specific code | |
444 | * return what is possible given the options | |
445 | */ | |
446 | drive_strength = card->host->ops->select_drive_strength( | |
447 | card->sw_caps.uhs_max_dtr, | |
448 | host_drv_type, card_drv_type); | |
449 | ||
450 | /* if error just use default for drive strength B */ | |
451 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0, | |
452 | &card_strength); | |
453 | if (err) | |
454 | return; | |
455 | ||
456 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); | |
457 | card_strength |= host_drive_to_sdio_drive(drive_strength); | |
458 | ||
459 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH, | |
460 | card_strength, NULL); | |
461 | ||
462 | /* if error default to drive strength B */ | |
463 | if (!err) | |
464 | mmc_set_driver_type(card->host, drive_strength); | |
465 | } | |
466 | ||
467 | ||
468 | static int sdio_set_bus_speed_mode(struct mmc_card *card) | |
469 | { | |
470 | unsigned int bus_speed, timing; | |
471 | int err; | |
472 | unsigned char speed; | |
473 | ||
474 | /* | |
475 | * If the host doesn't support any of the UHS-I modes, fallback on | |
476 | * default speed. | |
477 | */ | |
41875e38 | 478 | if (!mmc_host_uhs(card->host)) |
a303c531 PR |
479 | return 0; |
480 | ||
481 | bus_speed = SDIO_SPEED_SDR12; | |
482 | timing = MMC_TIMING_UHS_SDR12; | |
483 | if ((card->host->caps & MMC_CAP_UHS_SDR104) && | |
484 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) { | |
485 | bus_speed = SDIO_SPEED_SDR104; | |
486 | timing = MMC_TIMING_UHS_SDR104; | |
487 | card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR; | |
77e2ff08 | 488 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
a303c531 PR |
489 | } else if ((card->host->caps & MMC_CAP_UHS_DDR50) && |
490 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) { | |
491 | bus_speed = SDIO_SPEED_DDR50; | |
492 | timing = MMC_TIMING_UHS_DDR50; | |
493 | card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR; | |
77e2ff08 | 494 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
a303c531 PR |
495 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
496 | MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode & | |
497 | SD_MODE_UHS_SDR50)) { | |
498 | bus_speed = SDIO_SPEED_SDR50; | |
499 | timing = MMC_TIMING_UHS_SDR50; | |
500 | card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR; | |
77e2ff08 | 501 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
a303c531 PR |
502 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
503 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) && | |
504 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) { | |
505 | bus_speed = SDIO_SPEED_SDR25; | |
506 | timing = MMC_TIMING_UHS_SDR25; | |
507 | card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR; | |
77e2ff08 | 508 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
a303c531 PR |
509 | } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 | |
510 | MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 | | |
511 | MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode & | |
512 | SD_MODE_UHS_SDR12)) { | |
513 | bus_speed = SDIO_SPEED_SDR12; | |
514 | timing = MMC_TIMING_UHS_SDR12; | |
515 | card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR; | |
77e2ff08 | 516 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
a303c531 PR |
517 | } |
518 | ||
519 | err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); | |
520 | if (err) | |
521 | return err; | |
522 | ||
523 | speed &= ~SDIO_SPEED_BSS_MASK; | |
524 | speed |= bus_speed; | |
525 | err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); | |
526 | if (err) | |
527 | return err; | |
528 | ||
529 | if (bus_speed) { | |
530 | mmc_set_timing(card->host, timing); | |
531 | mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr); | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | /* | |
538 | * UHS-I specific initialization procedure | |
539 | */ | |
540 | static int mmc_sdio_init_uhs_card(struct mmc_card *card) | |
541 | { | |
542 | int err; | |
543 | ||
544 | if (!card->scr.sda_spec3) | |
545 | return 0; | |
546 | ||
547 | /* | |
548 | * Switch to wider bus (if supported). | |
549 | */ | |
550 | if (card->host->caps & MMC_CAP_4_BIT_DATA) { | |
551 | err = sdio_enable_4bit_bus(card); | |
552 | if (err > 0) { | |
553 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
554 | err = 0; | |
555 | } | |
556 | } | |
557 | ||
558 | /* Set the driver strength for the card */ | |
559 | sdio_select_driver_type(card); | |
560 | ||
561 | /* Set bus speed mode of the card */ | |
562 | err = sdio_set_bus_speed_mode(card); | |
563 | if (err) | |
564 | goto out; | |
565 | ||
810e08ee FS |
566 | /* |
567 | * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and | |
568 | * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104. | |
569 | */ | |
570 | if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning && | |
571 | ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) || | |
572 | (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104))) { | |
573 | mmc_host_clk_hold(card->host); | |
a4924c71 G |
574 | err = card->host->ops->execute_tuning(card->host, |
575 | MMC_SEND_TUNING_BLOCK); | |
810e08ee FS |
576 | mmc_host_clk_release(card->host); |
577 | } | |
a303c531 PR |
578 | |
579 | out: | |
580 | ||
581 | return err; | |
582 | } | |
583 | ||
17d33e14 NP |
584 | /* |
585 | * Handle the detection and initialisation of a card. | |
586 | * | |
587 | * In the case of a resume, "oldcard" will contain the card | |
588 | * we're trying to reinitialise. | |
589 | */ | |
590 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, | |
3bca4cf7 | 591 | struct mmc_card *oldcard, int powered_resume) |
17d33e14 NP |
592 | { |
593 | struct mmc_card *card; | |
594 | int err; | |
0797e5f1 | 595 | int retries = 10; |
17d33e14 NP |
596 | |
597 | BUG_ON(!host); | |
598 | WARN_ON(!host->claimed); | |
599 | ||
0797e5f1 JR |
600 | try_again: |
601 | if (!retries) { | |
602 | pr_warning("%s: Skipping voltage switch\n", | |
603 | mmc_hostname(host)); | |
604 | ocr &= ~R4_18V_PRESENT; | |
605 | host->ocr &= ~R4_18V_PRESENT; | |
606 | } | |
607 | ||
17d33e14 NP |
608 | /* |
609 | * Inform the card of the voltage | |
610 | */ | |
3bca4cf7 CB |
611 | if (!powered_resume) { |
612 | err = mmc_send_io_op_cond(host, host->ocr, &ocr); | |
613 | if (err) | |
614 | goto err; | |
615 | } | |
17d33e14 NP |
616 | |
617 | /* | |
618 | * For SPI, enable CRC as appropriate. | |
619 | */ | |
620 | if (mmc_host_is_spi(host)) { | |
621 | err = mmc_spi_set_crc(host, use_spi_crc); | |
622 | if (err) | |
623 | goto err; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Allocate card structure. | |
628 | */ | |
629 | card = mmc_alloc_card(host, NULL); | |
630 | if (IS_ERR(card)) { | |
631 | err = PTR_ERR(card); | |
632 | goto err; | |
633 | } | |
634 | ||
d6d50a15 AN |
635 | if ((ocr & R4_MEMORY_PRESENT) && |
636 | mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid, NULL) == 0) { | |
7310ece8 MM |
637 | card->type = MMC_TYPE_SD_COMBO; |
638 | ||
639 | if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || | |
640 | memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { | |
641 | mmc_remove_card(card); | |
642 | return -ENOENT; | |
643 | } | |
644 | } else { | |
645 | card->type = MMC_TYPE_SDIO; | |
646 | ||
647 | if (oldcard && oldcard->type != MMC_TYPE_SDIO) { | |
648 | mmc_remove_card(card); | |
649 | return -ENOENT; | |
650 | } | |
651 | } | |
17d33e14 | 652 | |
3fcb027d DM |
653 | /* |
654 | * Call the optional HC's init_card function to handle quirks. | |
655 | */ | |
656 | if (host->ops->init_card) | |
657 | host->ops->init_card(host, card); | |
658 | ||
a303c531 PR |
659 | /* |
660 | * If the host and card support UHS-I mode request the card | |
661 | * to switch to 1.8V signaling level. No 1.8v signalling if | |
7122bbb0 | 662 | * UHS mode is not enabled to maintain compatibility and some |
a303c531 PR |
663 | * systems that claim 1.8v signalling in fact do not support |
664 | * it. | |
665 | */ | |
0797e5f1 | 666 | if (!powered_resume && (ocr & R4_18V_PRESENT) && mmc_host_uhs(host)) { |
567c8903 | 667 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
0797e5f1 JR |
668 | if (err == -EAGAIN) { |
669 | sdio_reset(host); | |
670 | mmc_go_idle(host); | |
671 | mmc_send_if_cond(host, host->ocr_avail); | |
672 | mmc_remove_card(card); | |
673 | retries--; | |
674 | goto try_again; | |
675 | } else if (err) { | |
a303c531 PR |
676 | ocr &= ~R4_18V_PRESENT; |
677 | host->ocr &= ~R4_18V_PRESENT; | |
678 | } | |
679 | err = 0; | |
680 | } else { | |
681 | ocr &= ~R4_18V_PRESENT; | |
682 | host->ocr &= ~R4_18V_PRESENT; | |
683 | } | |
684 | ||
17d33e14 NP |
685 | /* |
686 | * For native busses: set card RCA and quit open drain mode. | |
687 | */ | |
3bca4cf7 | 688 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
689 | err = mmc_send_relative_addr(host, &card->rca); |
690 | if (err) | |
691 | goto remove; | |
692 | ||
0aab3995 SNX |
693 | /* |
694 | * Update oldcard with the new RCA received from the SDIO | |
695 | * device -- we're doing this so that it's updated in the | |
696 | * "card" struct when oldcard overwrites that later. | |
697 | */ | |
698 | if (oldcard) | |
699 | oldcard->rca = card->rca; | |
17d33e14 NP |
700 | } |
701 | ||
7310ece8 MM |
702 | /* |
703 | * Read CSD, before selecting the card | |
704 | */ | |
705 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { | |
706 | err = mmc_sd_get_csd(host, card); | |
707 | if (err) | |
708 | return err; | |
709 | ||
710 | mmc_decode_cid(card); | |
711 | } | |
712 | ||
17d33e14 NP |
713 | /* |
714 | * Select card, as all following commands rely on that. | |
715 | */ | |
3bca4cf7 | 716 | if (!powered_resume && !mmc_host_is_spi(host)) { |
17d33e14 NP |
717 | err = mmc_select_card(card); |
718 | if (err) | |
719 | goto remove; | |
720 | } | |
721 | ||
6f51be3d GI |
722 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
723 | /* | |
724 | * This is non-standard SDIO device, meaning it doesn't | |
725 | * have any CIA (Common I/O area) registers present. | |
726 | * It's host's responsibility to fill cccr and cis | |
727 | * structures in init_card(). | |
728 | */ | |
729 | mmc_set_clock(host, card->cis.max_dtr); | |
730 | ||
731 | if (card->cccr.high_speed) { | |
732 | mmc_card_set_highspeed(card); | |
733 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); | |
734 | } | |
735 | ||
736 | goto finish; | |
737 | } | |
738 | ||
17d33e14 NP |
739 | /* |
740 | * Read the common registers. | |
741 | */ | |
2d0d68f5 | 742 | err = sdio_read_cccr(card, ocr); |
17d33e14 NP |
743 | if (err) |
744 | goto remove; | |
745 | ||
746 | /* | |
747 | * Read the common CIS tuples. | |
748 | */ | |
749 | err = sdio_read_common_cis(card); | |
750 | if (err) | |
751 | goto remove; | |
752 | ||
753 | if (oldcard) { | |
754 | int same = (card->cis.vendor == oldcard->cis.vendor && | |
755 | card->cis.device == oldcard->cis.device); | |
756 | mmc_remove_card(card); | |
7310ece8 MM |
757 | if (!same) |
758 | return -ENOENT; | |
759 | ||
17d33e14 NP |
760 | card = oldcard; |
761 | } | |
32780cd1 | 762 | mmc_fixup_device(card, NULL); |
17d33e14 | 763 | |
7310ece8 MM |
764 | if (card->type == MMC_TYPE_SD_COMBO) { |
765 | err = mmc_sd_setup_card(host, card, oldcard != NULL); | |
766 | /* handle as SDIO-only card if memory init failed */ | |
767 | if (err) { | |
768 | mmc_go_idle(host); | |
769 | if (mmc_host_is_spi(host)) | |
770 | /* should not fail, as it worked previously */ | |
771 | mmc_spi_set_crc(host, use_spi_crc); | |
772 | card->type = MMC_TYPE_SDIO; | |
773 | } else | |
774 | card->dev.type = &sd_type; | |
775 | } | |
776 | ||
777 | /* | |
778 | * If needed, disconnect card detection pull-up resistor. | |
779 | */ | |
780 | err = sdio_disable_cd(card); | |
781 | if (err) | |
782 | goto remove; | |
783 | ||
a303c531 PR |
784 | /* Initialization sequence for UHS-I cards */ |
785 | /* Only if card supports 1.8v and UHS signaling */ | |
786 | if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) { | |
787 | err = mmc_sdio_init_uhs_card(card); | |
788 | if (err) | |
789 | goto remove; | |
17d33e14 | 790 | |
a303c531 PR |
791 | /* Card is an ultra-high-speed card */ |
792 | mmc_card_set_uhs(card); | |
793 | } else { | |
794 | /* | |
795 | * Switch to high-speed (if supported). | |
796 | */ | |
797 | err = sdio_enable_hs(card); | |
798 | if (err > 0) | |
799 | mmc_sd_go_highspeed(card); | |
800 | else if (err) | |
801 | goto remove; | |
17d33e14 | 802 | |
a303c531 PR |
803 | /* |
804 | * Change to the card's maximum speed. | |
805 | */ | |
806 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); | |
17d33e14 | 807 | |
a303c531 PR |
808 | /* |
809 | * Switch to wider bus (if supported). | |
810 | */ | |
811 | err = sdio_enable_4bit_bus(card); | |
812 | if (err > 0) | |
813 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); | |
814 | else if (err) | |
815 | goto remove; | |
816 | } | |
6f51be3d | 817 | finish: |
17d33e14 NP |
818 | if (!oldcard) |
819 | host->card = card; | |
820 | return 0; | |
821 | ||
822 | remove: | |
823 | if (!oldcard) | |
824 | mmc_remove_card(card); | |
825 | ||
826 | err: | |
827 | return err; | |
828 | } | |
829 | ||
5c4e6f13 PO |
830 | /* |
831 | * Host is being removed. Free up the current card. | |
832 | */ | |
833 | static void mmc_sdio_remove(struct mmc_host *host) | |
834 | { | |
e29a7d73 PO |
835 | int i; |
836 | ||
5c4e6f13 PO |
837 | BUG_ON(!host); |
838 | BUG_ON(!host->card); | |
839 | ||
e29a7d73 PO |
840 | for (i = 0;i < host->card->sdio_funcs;i++) { |
841 | if (host->card->sdio_func[i]) { | |
842 | sdio_remove_func(host->card->sdio_func[i]); | |
843 | host->card->sdio_func[i] = NULL; | |
844 | } | |
845 | } | |
846 | ||
5c4e6f13 PO |
847 | mmc_remove_card(host->card); |
848 | host->card = NULL; | |
849 | } | |
850 | ||
d3049504 AH |
851 | /* |
852 | * Card detection - card is alive. | |
853 | */ | |
854 | static int mmc_sdio_alive(struct mmc_host *host) | |
855 | { | |
856 | return mmc_select_card(host->card); | |
857 | } | |
858 | ||
5c4e6f13 PO |
859 | /* |
860 | * Card detection callback from host. | |
861 | */ | |
862 | static void mmc_sdio_detect(struct mmc_host *host) | |
863 | { | |
864 | int err; | |
865 | ||
866 | BUG_ON(!host); | |
867 | BUG_ON(!host->card); | |
868 | ||
87973ba2 | 869 | /* Make sure card is powered before detecting it */ |
ed919b01 OBC |
870 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
871 | err = pm_runtime_get_sync(&host->card->dev); | |
3bffb800 LF |
872 | if (err < 0) { |
873 | pm_runtime_put_noidle(&host->card->dev); | |
ed919b01 | 874 | goto out; |
3bffb800 | 875 | } |
ed919b01 | 876 | } |
87973ba2 | 877 | |
5c4e6f13 PO |
878 | mmc_claim_host(host); |
879 | ||
880 | /* | |
881 | * Just check if our card has been removed. | |
882 | */ | |
d3049504 | 883 | err = _mmc_detect_card_removed(host); |
5c4e6f13 PO |
884 | |
885 | mmc_release_host(host); | |
886 | ||
4d0812c3 OBC |
887 | /* |
888 | * Tell PM core it's OK to power off the card now. | |
889 | * | |
890 | * The _sync variant is used in order to ensure that the card | |
891 | * is left powered off in case an error occurred, and the card | |
892 | * is going to be removed. | |
893 | * | |
894 | * Since there is no specific reason to believe a new user | |
895 | * is about to show up at this point, the _sync variant is | |
896 | * desirable anyway. | |
897 | */ | |
ed919b01 OBC |
898 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
899 | pm_runtime_put_sync(&host->card->dev); | |
4d0812c3 | 900 | |
87973ba2 | 901 | out: |
5c4e6f13 PO |
902 | if (err) { |
903 | mmc_sdio_remove(host); | |
904 | ||
905 | mmc_claim_host(host); | |
906 | mmc_detach_bus(host); | |
7f7e4129 | 907 | mmc_power_off(host); |
5c4e6f13 PO |
908 | mmc_release_host(host); |
909 | } | |
910 | } | |
911 | ||
17d33e14 NP |
912 | /* |
913 | * SDIO suspend. We need to suspend all functions separately. | |
914 | * Therefore all registered functions must have drivers with suspend | |
915 | * and resume methods. Failing that we simply remove the whole card. | |
916 | */ | |
95cdfb72 | 917 | static int mmc_sdio_suspend(struct mmc_host *host) |
17d33e14 | 918 | { |
95cdfb72 | 919 | int i, err = 0; |
17d33e14 | 920 | |
17d33e14 NP |
921 | for (i = 0; i < host->card->sdio_funcs; i++) { |
922 | struct sdio_func *func = host->card->sdio_func[i]; | |
923 | if (func && sdio_func_present(func) && func->dev.driver) { | |
924 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
925 | if (!pmops || !pmops->suspend || !pmops->resume) { | |
95cdfb72 NP |
926 | /* force removal of entire card in that case */ |
927 | err = -ENOSYS; | |
928 | } else | |
929 | err = pmops->suspend(&func->dev); | |
930 | if (err) | |
931 | break; | |
17d33e14 NP |
932 | } |
933 | } | |
95cdfb72 | 934 | while (err && --i >= 0) { |
17d33e14 NP |
935 | struct sdio_func *func = host->card->sdio_func[i]; |
936 | if (func && sdio_func_present(func) && func->dev.driver) { | |
937 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
95cdfb72 | 938 | pmops->resume(&func->dev); |
17d33e14 NP |
939 | } |
940 | } | |
95cdfb72 | 941 | |
6b93d01f | 942 | if (!err && mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
6b5eda36 DD |
943 | mmc_claim_host(host); |
944 | sdio_disable_wide(host->card); | |
945 | mmc_release_host(host); | |
946 | } | |
947 | ||
95cdfb72 | 948 | return err; |
17d33e14 NP |
949 | } |
950 | ||
95cdfb72 | 951 | static int mmc_sdio_resume(struct mmc_host *host) |
17d33e14 | 952 | { |
080bc977 | 953 | int i, err = 0; |
17d33e14 NP |
954 | |
955 | BUG_ON(!host); | |
956 | BUG_ON(!host->card); | |
957 | ||
95cdfb72 | 958 | /* Basic card reinitialization. */ |
17d33e14 | 959 | mmc_claim_host(host); |
080bc977 OBC |
960 | |
961 | /* No need to reinitialize powered-resumed nonremovable cards */ | |
51aa66a5 SJ |
962 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
963 | sdio_reset(host); | |
964 | mmc_go_idle(host); | |
080bc977 | 965 | err = mmc_sdio_init_card(host, host->ocr, host->card, |
a5e9425d | 966 | mmc_card_keep_power(host)); |
51aa66a5 | 967 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
080bc977 OBC |
968 | /* We may have switched to 1-bit mode during suspend */ |
969 | err = sdio_enable_4bit_bus(host->card); | |
970 | if (err > 0) { | |
971 | mmc_set_bus_width(host, MMC_BUS_WIDTH_4); | |
972 | err = 0; | |
973 | } | |
974 | } | |
975 | ||
40216842 | 976 | if (!err && host->sdio_irqs) |
bbbc4c4d | 977 | wake_up_process(host->sdio_irq_thread); |
17d33e14 | 978 | mmc_release_host(host); |
17d33e14 | 979 | |
95cdfb72 NP |
980 | /* |
981 | * If the card looked to be the same as before suspending, then | |
982 | * we proceed to resume all card functions. If one of them returns | |
983 | * an error then we simply return that error to the core and the | |
984 | * card will be redetected as new. It is the responsibility of | |
985 | * the function driver to perform further tests with the extra | |
986 | * knowledge it has of the card to confirm the card is indeed the | |
987 | * same as before suspending (same MAC address for network cards, | |
988 | * etc.) and return an error otherwise. | |
989 | */ | |
990 | for (i = 0; !err && i < host->card->sdio_funcs; i++) { | |
17d33e14 NP |
991 | struct sdio_func *func = host->card->sdio_func[i]; |
992 | if (func && sdio_func_present(func) && func->dev.driver) { | |
993 | const struct dev_pm_ops *pmops = func->dev.driver->pm; | |
95cdfb72 | 994 | err = pmops->resume(&func->dev); |
17d33e14 NP |
995 | } |
996 | } | |
95cdfb72 NP |
997 | |
998 | return err; | |
17d33e14 | 999 | } |
5c4e6f13 | 1000 | |
d3fe37b1 OBC |
1001 | static int mmc_sdio_power_restore(struct mmc_host *host) |
1002 | { | |
1003 | int ret; | |
c6e633ad | 1004 | u32 ocr; |
d3fe37b1 OBC |
1005 | |
1006 | BUG_ON(!host); | |
1007 | BUG_ON(!host->card); | |
1008 | ||
1009 | mmc_claim_host(host); | |
c6e633ad DD |
1010 | |
1011 | /* | |
1012 | * Reset the card by performing the same steps that are taken by | |
1013 | * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe. | |
1014 | * | |
1015 | * sdio_reset() is technically not needed. Having just powered up the | |
1016 | * hardware, it should already be in reset state. However, some | |
1017 | * platforms (such as SD8686 on OLPC) do not instantly cut power, | |
1018 | * meaning that a reset is required when restoring power soon after | |
1019 | * powering off. It is harmless in other cases. | |
1020 | * | |
1021 | * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec, | |
1022 | * is not necessary for non-removable cards. However, it is required | |
1023 | * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and | |
1024 | * harmless in other situations. | |
1025 | * | |
1026 | * With these steps taken, mmc_select_voltage() is also required to | |
1027 | * restore the correct voltage setting of the card. | |
1028 | */ | |
e7747475 | 1029 | |
c6e633ad DD |
1030 | sdio_reset(host); |
1031 | mmc_go_idle(host); | |
1032 | mmc_send_if_cond(host, host->ocr_avail); | |
1033 | ||
1034 | ret = mmc_send_io_op_cond(host, 0, &ocr); | |
1035 | if (ret) | |
1036 | goto out; | |
1037 | ||
1038 | if (host->ocr_avail_sdio) | |
1039 | host->ocr_avail = host->ocr_avail_sdio; | |
1040 | ||
1041 | host->ocr = mmc_select_voltage(host, ocr & ~0x7F); | |
1042 | if (!host->ocr) { | |
1043 | ret = -EINVAL; | |
1044 | goto out; | |
1045 | } | |
1046 | ||
41875e38 SRT |
1047 | if (mmc_host_uhs(host)) |
1048 | /* to query card if 1.8V signalling is supported */ | |
1049 | host->ocr |= R4_18V_PRESENT; | |
1050 | ||
d3fe37b1 | 1051 | ret = mmc_sdio_init_card(host, host->ocr, host->card, |
a5e9425d | 1052 | mmc_card_keep_power(host)); |
d3fe37b1 OBC |
1053 | if (!ret && host->sdio_irqs) |
1054 | mmc_signal_sdio_irq(host); | |
c6e633ad DD |
1055 | |
1056 | out: | |
d3fe37b1 OBC |
1057 | mmc_release_host(host); |
1058 | ||
1059 | return ret; | |
1060 | } | |
1061 | ||
12d01d0b UH |
1062 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
1063 | { | |
1064 | /* No references to the card, cut the power to it. */ | |
1065 | mmc_power_off(host); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | static int mmc_sdio_runtime_resume(struct mmc_host *host) | |
1070 | { | |
1071 | /* Restore power and re-initialize. */ | |
1072 | mmc_power_up(host); | |
1073 | return mmc_sdio_power_restore(host); | |
1074 | } | |
1075 | ||
5c4e6f13 PO |
1076 | static const struct mmc_bus_ops mmc_sdio_ops = { |
1077 | .remove = mmc_sdio_remove, | |
1078 | .detect = mmc_sdio_detect, | |
17d33e14 NP |
1079 | .suspend = mmc_sdio_suspend, |
1080 | .resume = mmc_sdio_resume, | |
12d01d0b UH |
1081 | .runtime_suspend = mmc_sdio_runtime_suspend, |
1082 | .runtime_resume = mmc_sdio_runtime_resume, | |
d3fe37b1 | 1083 | .power_restore = mmc_sdio_power_restore, |
d3049504 | 1084 | .alive = mmc_sdio_alive, |
5c4e6f13 PO |
1085 | }; |
1086 | ||
1087 | ||
1088 | /* | |
1089 | * Starting point for SDIO card init. | |
1090 | */ | |
807e8e40 | 1091 | int mmc_attach_sdio(struct mmc_host *host) |
5c4e6f13 | 1092 | { |
807e8e40 AR |
1093 | int err, i, funcs; |
1094 | u32 ocr; | |
5c4e6f13 PO |
1095 | struct mmc_card *card; |
1096 | ||
1097 | BUG_ON(!host); | |
d84075c8 | 1098 | WARN_ON(!host->claimed); |
5c4e6f13 | 1099 | |
807e8e40 AR |
1100 | err = mmc_send_io_op_cond(host, 0, &ocr); |
1101 | if (err) | |
1102 | return err; | |
1103 | ||
5c4e6f13 | 1104 | mmc_attach_bus(host, &mmc_sdio_ops); |
8f230f45 TI |
1105 | if (host->ocr_avail_sdio) |
1106 | host->ocr_avail = host->ocr_avail_sdio; | |
5c4e6f13 PO |
1107 | |
1108 | /* | |
1109 | * Sanity check the voltages that the card claims to | |
1110 | * support. | |
1111 | */ | |
1112 | if (ocr & 0x7F) { | |
a3c76eb9 | 1113 | pr_warning("%s: card claims to support voltages " |
5c4e6f13 PO |
1114 | "below the defined range. These will be ignored.\n", |
1115 | mmc_hostname(host)); | |
1116 | ocr &= ~0x7F; | |
1117 | } | |
1118 | ||
5c4e6f13 PO |
1119 | host->ocr = mmc_select_voltage(host, ocr); |
1120 | ||
1121 | /* | |
1122 | * Can we support the voltage(s) of the card(s)? | |
1123 | */ | |
1124 | if (!host->ocr) { | |
1125 | err = -EINVAL; | |
1126 | goto err; | |
1127 | } | |
1128 | ||
1129 | /* | |
17d33e14 | 1130 | * Detect and init the card. |
5c4e6f13 | 1131 | */ |
41875e38 SRT |
1132 | if (mmc_host_uhs(host)) |
1133 | /* to query card if 1.8V signalling is supported */ | |
1134 | host->ocr |= R4_18V_PRESENT; | |
1135 | ||
3bca4cf7 | 1136 | err = mmc_sdio_init_card(host, host->ocr, NULL, 0); |
a303c531 PR |
1137 | if (err) { |
1138 | if (err == -EAGAIN) { | |
1139 | /* | |
1140 | * Retry initialization with S18R set to 0. | |
1141 | */ | |
1142 | host->ocr &= ~R4_18V_PRESENT; | |
1143 | err = mmc_sdio_init_card(host, host->ocr, NULL, 0); | |
1144 | } | |
1145 | if (err) | |
1146 | goto err; | |
1147 | } | |
17d33e14 | 1148 | card = host->card; |
af517150 | 1149 | |
81968561 | 1150 | /* |
ed919b01 | 1151 | * Enable runtime PM only if supported by host+card+board |
81968561 | 1152 | */ |
ed919b01 OBC |
1153 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
1154 | /* | |
1155 | * Let runtime PM core know our card is active | |
1156 | */ | |
1157 | err = pm_runtime_set_active(&card->dev); | |
1158 | if (err) | |
1159 | goto remove; | |
81968561 | 1160 | |
ed919b01 OBC |
1161 | /* |
1162 | * Enable runtime PM for this card | |
1163 | */ | |
1164 | pm_runtime_enable(&card->dev); | |
1165 | } | |
81968561 | 1166 | |
5c4e6f13 PO |
1167 | /* |
1168 | * The number of functions on the card is encoded inside | |
1169 | * the ocr. | |
1170 | */ | |
e8812793 MF |
1171 | funcs = (ocr & 0x70000000) >> 28; |
1172 | card->sdio_funcs = 0; | |
4ff6471c | 1173 | |
e29a7d73 PO |
1174 | /* |
1175 | * Initialize (but don't add) all present functions. | |
1176 | */ | |
e8812793 | 1177 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
e29a7d73 PO |
1178 | err = sdio_init_func(host->card, i + 1); |
1179 | if (err) | |
1180 | goto remove; | |
40bba0c1 OBC |
1181 | |
1182 | /* | |
ed919b01 | 1183 | * Enable Runtime PM for this func (if supported) |
40bba0c1 | 1184 | */ |
ed919b01 OBC |
1185 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
1186 | pm_runtime_enable(&card->sdio_func[i]->dev); | |
e29a7d73 | 1187 | } |
5c4e6f13 | 1188 | |
e29a7d73 PO |
1189 | /* |
1190 | * First add the card to the driver model... | |
1191 | */ | |
807e8e40 | 1192 | mmc_release_host(host); |
5c4e6f13 PO |
1193 | err = mmc_add_card(host->card); |
1194 | if (err) | |
e29a7d73 PO |
1195 | goto remove_added; |
1196 | ||
1197 | /* | |
1198 | * ...then the SDIO functions. | |
1199 | */ | |
1200 | for (i = 0;i < funcs;i++) { | |
1201 | err = sdio_add_func(host->card->sdio_func[i]); | |
1202 | if (err) | |
1203 | goto remove_added; | |
1204 | } | |
5c4e6f13 | 1205 | |
34497913 | 1206 | mmc_claim_host(host); |
5c4e6f13 PO |
1207 | return 0; |
1208 | ||
e29a7d73 PO |
1209 | |
1210 | remove_added: | |
1211 | /* Remove without lock if the device has been added. */ | |
1212 | mmc_sdio_remove(host); | |
5c4e6f13 | 1213 | mmc_claim_host(host); |
e29a7d73 PO |
1214 | remove: |
1215 | /* And with lock if it hasn't been added. */ | |
807e8e40 | 1216 | mmc_release_host(host); |
e29a7d73 PO |
1217 | if (host->card) |
1218 | mmc_sdio_remove(host); | |
807e8e40 | 1219 | mmc_claim_host(host); |
5c4e6f13 PO |
1220 | err: |
1221 | mmc_detach_bus(host); | |
5c4e6f13 | 1222 | |
a3c76eb9 | 1223 | pr_err("%s: error %d whilst initialising SDIO card\n", |
5c4e6f13 PO |
1224 | mmc_hostname(host), err); |
1225 | ||
1226 | return err; | |
1227 | } | |
1228 |