blob: 261c88632c43662e3d7b79f5e6d7a8bb557265ac [file] [log] [blame]
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001/*
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>
Ohad Ben-Cohen819685612010-10-02 13:54:10 +020013#include <linux/pm_runtime.h>
Pierre Ossman5c4e6f12007-05-21 20:23:20 +020014
15#include <linux/mmc/host.h>
16#include <linux/mmc/card.h>
Girish K Sa4924c72012-01-11 14:04:52 -050017#include <linux/mmc/mmc.h>
Pierre Ossman35c66c12007-06-11 20:25:43 +020018#include <linux/mmc/sdio.h>
Pierre Ossmane29a7d72007-05-26 13:48:18 +020019#include <linux/mmc/sdio_func.h>
Ohad Ben-Coheneab40682011-04-05 17:50:14 +030020#include <linux/mmc/sdio_ids.h>
Pierre Ossman5c4e6f12007-05-21 20:23:20 +020021
22#include "core.h"
Ulf Hansson4facdde2017-01-13 14:14:14 +010023#include "card.h"
Ulf Hansson5857b292017-01-13 14:14:15 +010024#include "host.h"
Pierre Ossman5c4e6f12007-05-21 20:23:20 +020025#include "bus.h"
Michal Miroslaw71578a12010-08-10 18:01:40 -070026#include "sd.h"
Pierre Ossmane29a7d72007-05-26 13:48:18 +020027#include "sdio_bus.h"
Pierre Ossman5c4e6f12007-05-21 20:23:20 +020028#include "mmc_ops.h"
29#include "sd_ops.h"
30#include "sdio_ops.h"
Nicolas Pitreb7261262007-06-16 02:04:16 -040031#include "sdio_cis.h"
Pierre Ossman5c4e6f12007-05-21 20:23:20 +020032
Pierre Ossman05970072007-06-11 21:01:00 +020033static int sdio_read_fbr(struct sdio_func *func)
34{
35 int ret;
36 unsigned char data;
37
Ohad Ben-Coheneab40682011-04-05 17:50:14 +030038 if (mmc_card_nonstd_func_interface(func->card)) {
39 func->class = SDIO_CLASS_NONE;
40 return 0;
41 }
42
Pierre Ossman05970072007-06-11 21:01:00 +020043 ret = mmc_io_rw_direct(func->card, 0, 0,
David Vrabel7616ee92007-08-08 14:23:05 +010044 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
Pierre Ossman05970072007-06-11 21:01:00 +020045 if (ret)
46 goto out;
47
48 data &= 0x0f;
49
50 if (data == 0x0f) {
51 ret = mmc_io_rw_direct(func->card, 0, 0,
David Vrabel7616ee92007-08-08 14:23:05 +010052 SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
Pierre Ossman05970072007-06-11 21:01:00 +020053 if (ret)
54 goto out;
55 }
56
57 func->class = data;
58
59out:
60 return ret;
61}
62
Pierre Ossmane29a7d72007-05-26 13:48:18 +020063static int sdio_init_func(struct mmc_card *card, unsigned int fn)
64{
Pierre Ossman05970072007-06-11 21:01:00 +020065 int ret;
Pierre Ossmane29a7d72007-05-26 13:48:18 +020066 struct sdio_func *func;
67
Shawn Lin5df0e8232016-11-02 15:24:00 +080068 if (WARN_ON(fn > SDIO_MAX_FUNCS))
69 return -EINVAL;
Pierre Ossmane29a7d72007-05-26 13:48:18 +020070
71 func = sdio_alloc_func(card);
72 if (IS_ERR(func))
73 return PTR_ERR(func);
74
75 func->num = fn;
76
Grazvydas Ignotas6f51be32010-08-10 18:01:50 -070077 if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
78 ret = sdio_read_fbr(func);
79 if (ret)
80 goto fail;
Pierre Ossman05970072007-06-11 21:01:00 +020081
Grazvydas Ignotas6f51be32010-08-10 18:01:50 -070082 ret = sdio_read_func_cis(func);
83 if (ret)
84 goto fail;
85 } else {
86 func->vendor = func->card->cis.vendor;
87 func->device = func->card->cis.device;
88 func->max_blksize = func->card->cis.blksize;
89 }
Nicolas Pitreb7261262007-06-16 02:04:16 -040090
Pierre Ossmane29a7d72007-05-26 13:48:18 +020091 card->sdio_func[fn - 1] = func;
92
93 return 0;
Pierre Ossman05970072007-06-11 21:01:00 +020094
95fail:
96 /*
97 * It is okay to remove the function here even though we hold
98 * the host lock as we haven't registered the device yet.
99 */
100 sdio_remove_func(func);
101 return ret;
Pierre Ossmane29a7d72007-05-26 13:48:18 +0200102}
103
Philip Rakity2d0d68f2012-01-26 06:57:10 -0800104static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
Pierre Ossman35c66c12007-06-11 20:25:43 +0200105{
106 int ret;
107 int cccr_vsn;
Philip Rakity2d0d68f2012-01-26 06:57:10 -0800108 int uhs = ocr & R4_18V_PRESENT;
Pierre Ossman35c66c12007-06-11 20:25:43 +0200109 unsigned char data;
Philip Rakitya303c532011-11-14 19:14:38 -0800110 unsigned char speed;
Pierre Ossman35c66c12007-06-11 20:25:43 +0200111
Pierre Ossman35c66c12007-06-11 20:25:43 +0200112 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
113 if (ret)
114 goto out;
115
116 cccr_vsn = data & 0x0f;
117
Bing Zhaob4625da2011-10-20 19:16:32 -0700118 if (cccr_vsn > SDIO_CCCR_REV_3_00) {
Girish K Sa3c76eb2011-10-11 11:44:09 +0530119 pr_err("%s: unrecognised CCCR structure version %d\n",
Pierre Ossman35c66c12007-06-11 20:25:43 +0200120 mmc_hostname(card->host), cccr_vsn);
121 return -EINVAL;
122 }
123
124 card->cccr.sdio_vsn = (data & 0xf0) >> 4;
125
126 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
127 if (ret)
128 goto out;
129
130 if (data & SDIO_CCCR_CAP_SMB)
131 card->cccr.multi_block = 1;
132 if (data & SDIO_CCCR_CAP_LSC)
133 card->cccr.low_speed = 1;
134 if (data & SDIO_CCCR_CAP_4BLS)
135 card->cccr.wide_bus = 1;
136
137 if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
138 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
139 if (ret)
140 goto out;
141
142 if (data & SDIO_POWER_SMPC)
143 card->cccr.high_power = 1;
144 }
145
146 if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
Philip Rakitya303c532011-11-14 19:14:38 -0800147 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
Pierre Ossman35c66c12007-06-11 20:25:43 +0200148 if (ret)
149 goto out;
150
Philip Rakitya303c532011-11-14 19:14:38 -0800151 card->scr.sda_spec3 = 0;
152 card->sw_caps.sd3_bus_mode = 0;
153 card->sw_caps.sd3_drv_type = 0;
Philip Rakity2d0d68f2012-01-26 06:57:10 -0800154 if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
Philip Rakitya303c532011-11-14 19:14:38 -0800155 card->scr.sda_spec3 = 1;
156 ret = mmc_io_rw_direct(card, 0, 0,
157 SDIO_CCCR_UHS, 0, &data);
158 if (ret)
159 goto out;
160
Sujit Reddy Thumma41875e32012-12-04 17:06:19 +0530161 if (mmc_host_uhs(card->host)) {
Philip Rakitya303c532011-11-14 19:14:38 -0800162 if (data & SDIO_UHS_DDR50)
163 card->sw_caps.sd3_bus_mode
164 |= SD_MODE_UHS_DDR50;
165
166 if (data & SDIO_UHS_SDR50)
167 card->sw_caps.sd3_bus_mode
168 |= SD_MODE_UHS_SDR50;
169
170 if (data & SDIO_UHS_SDR104)
171 card->sw_caps.sd3_bus_mode
172 |= SD_MODE_UHS_SDR104;
173 }
174
175 ret = mmc_io_rw_direct(card, 0, 0,
176 SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
177 if (ret)
178 goto out;
179
180 if (data & SDIO_DRIVE_SDTA)
181 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
182 if (data & SDIO_DRIVE_SDTC)
183 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
184 if (data & SDIO_DRIVE_SDTD)
185 card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
186 }
187
188 /* if no uhs mode ensure we check for high speed */
189 if (!card->sw_caps.sd3_bus_mode) {
190 if (speed & SDIO_SPEED_SHS) {
191 card->cccr.high_speed = 1;
192 card->sw_caps.hs_max_dtr = 50000000;
193 } else {
194 card->cccr.high_speed = 0;
195 card->sw_caps.hs_max_dtr = 25000000;
196 }
197 }
Pierre Ossman35c66c12007-06-11 20:25:43 +0200198 }
199
200out:
201 return ret;
202}
203
Pierre Ossman4ff64712007-07-30 18:23:53 +0200204static int sdio_enable_wide(struct mmc_card *card)
205{
206 int ret;
207 u8 ctrl;
208
209 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
210 return 0;
211
212 if (card->cccr.low_speed && !card->cccr.wide_bus)
213 return 0;
214
215 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
216 if (ret)
217 return ret;
218
Yong Ding2a0fe912012-05-15 13:09:43 +0800219 if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
Joe Perches66061102014-09-12 14:56:56 -0700220 pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
221 mmc_hostname(card->host), ctrl);
Yong Ding2a0fe912012-05-15 13:09:43 +0800222
223 /* set as 4-bit bus width */
224 ctrl &= ~SDIO_BUS_WIDTH_MASK;
Pierre Ossman4ff64712007-07-30 18:23:53 +0200225 ctrl |= SDIO_BUS_WIDTH_4BIT;
226
227 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
228 if (ret)
229 return ret;
230
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700231 return 1;
Pierre Ossman4ff64712007-07-30 18:23:53 +0200232}
233
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200234/*
Ohad Ben-Cohen006ebd52009-09-22 16:45:07 -0700235 * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
236 * of the card. This may be required on certain setups of boards,
237 * controllers and embedded sdio device which do not need the card's
238 * pull-up. As a result, card detection is disabled and power is saved.
239 */
240static int sdio_disable_cd(struct mmc_card *card)
241{
242 int ret;
243 u8 ctrl;
244
Ohad Ben-Cohen2059a022011-04-05 18:02:25 +0300245 if (!mmc_card_disable_cd(card))
Ohad Ben-Cohen006ebd52009-09-22 16:45:07 -0700246 return 0;
247
248 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
249 if (ret)
250 return ret;
251
252 ctrl |= SDIO_BUS_CD_DISABLE;
253
254 return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
255}
256
257/*
Daniel Drake6b5eda32010-03-05 13:43:34 -0800258 * Devices that remain active during a system suspend are
259 * put back into 1-bit mode.
260 */
261static int sdio_disable_wide(struct mmc_card *card)
262{
263 int ret;
264 u8 ctrl;
265
266 if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
267 return 0;
268
269 if (card->cccr.low_speed && !card->cccr.wide_bus)
270 return 0;
271
272 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
273 if (ret)
274 return ret;
275
276 if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
277 return 0;
278
279 ctrl &= ~SDIO_BUS_WIDTH_4BIT;
280 ctrl |= SDIO_BUS_ASYNC_INT;
281
282 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
283 if (ret)
284 return ret;
285
286 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
287
288 return 0;
289}
290
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700291
292static int sdio_enable_4bit_bus(struct mmc_card *card)
293{
294 int err;
295
296 if (card->type == MMC_TYPE_SDIO)
NeilBrown303dbed2015-02-24 13:42:23 +1100297 err = sdio_enable_wide(card);
298 else if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
299 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700300 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
301 if (err)
302 return err;
NeilBrown303dbed2015-02-24 13:42:23 +1100303 err = sdio_enable_wide(card);
304 if (err <= 0)
305 mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700306 } else
307 return 0;
308
NeilBrown303dbed2015-02-24 13:42:23 +1100309 if (err > 0) {
310 mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
311 err = 0;
312 }
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700313
314 return err;
315}
316
317
Daniel Drake6b5eda32010-03-05 13:43:34 -0800318/*
Pierre Ossmand16f5772008-08-31 17:22:46 +0200319 * Test if the card supports high-speed mode and, if so, switch to it.
320 */
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700321static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
Pierre Ossmand16f5772008-08-31 17:22:46 +0200322{
323 int ret;
324 u8 speed;
325
326 if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
327 return 0;
328
329 if (!card->cccr.high_speed)
330 return 0;
331
332 ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
333 if (ret)
334 return ret;
335
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700336 if (enable)
337 speed |= SDIO_SPEED_EHS;
338 else
339 speed &= ~SDIO_SPEED_EHS;
Pierre Ossmand16f5772008-08-31 17:22:46 +0200340
341 ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
342 if (ret)
343 return ret;
344
Michal Miroslaw71578a12010-08-10 18:01:40 -0700345 return 1;
346}
Pierre Ossmand16f5772008-08-31 17:22:46 +0200347
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700348/*
349 * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
350 */
351static int sdio_enable_hs(struct mmc_card *card)
352{
353 int ret;
354
355 ret = mmc_sdio_switch_hs(card, true);
356 if (ret <= 0 || card->type == MMC_TYPE_SDIO)
357 return ret;
358
359 ret = mmc_sd_switch_hs(card);
360 if (ret <= 0)
361 mmc_sdio_switch_hs(card, false);
362
363 return ret;
364}
365
Michal Miroslaw71578a12010-08-10 18:01:40 -0700366static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
367{
368 unsigned max_dtr;
369
Seungwon Jeoncdc99172014-04-23 17:07:35 +0900370 if (mmc_card_hs(card)) {
Michal Miroslaw71578a12010-08-10 18:01:40 -0700371 /*
372 * The SDIO specification doesn't mention how
373 * the CIS transfer speed register relates to
374 * high-speed, but it seems that 50 MHz is
375 * mandatory.
376 */
377 max_dtr = 50000000;
378 } else {
379 max_dtr = card->cis.max_dtr;
380 }
381
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700382 if (card->type == MMC_TYPE_SD_COMBO)
383 max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
384
Michal Miroslaw71578a12010-08-10 18:01:40 -0700385 return max_dtr;
Pierre Ossmand16f5772008-08-31 17:22:46 +0200386}
387
Philip Rakitya303c532011-11-14 19:14:38 -0800388static unsigned char host_drive_to_sdio_drive(int host_strength)
389{
390 switch (host_strength) {
391 case MMC_SET_DRIVER_TYPE_A:
392 return SDIO_DTSx_SET_TYPE_A;
393 case MMC_SET_DRIVER_TYPE_B:
394 return SDIO_DTSx_SET_TYPE_B;
395 case MMC_SET_DRIVER_TYPE_C:
396 return SDIO_DTSx_SET_TYPE_C;
397 case MMC_SET_DRIVER_TYPE_D:
398 return SDIO_DTSx_SET_TYPE_D;
399 default:
400 return SDIO_DTSx_SET_TYPE_B;
401 }
402}
403
404static void sdio_select_driver_type(struct mmc_card *card)
405{
Adrian Hunterfa021ce2015-02-06 14:12:53 +0200406 int card_drv_type, drive_strength, drv_type;
Philip Rakitya303c532011-11-14 19:14:38 -0800407 unsigned char card_strength;
408 int err;
409
Adrian Hunter3853a042015-02-06 14:12:56 +0200410 card->drive_strength = 0;
411
Adrian Hunterfa021ce2015-02-06 14:12:53 +0200412 card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
Philip Rakitya303c532011-11-14 19:14:38 -0800413
Adrian Huntere23350b2015-02-06 14:12:55 +0200414 drive_strength = mmc_select_drive_strength(card,
415 card->sw_caps.uhs_max_dtr,
416 card_drv_type, &drv_type);
Philip Rakitya303c532011-11-14 19:14:38 -0800417
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200418 if (drive_strength) {
419 /* if error just use default for drive strength B */
420 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
421 &card_strength);
422 if (err)
423 return;
Philip Rakitya303c532011-11-14 19:14:38 -0800424
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200425 card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
426 card_strength |= host_drive_to_sdio_drive(drive_strength);
Philip Rakitya303c532011-11-14 19:14:38 -0800427
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200428 /* if error default to drive strength B */
429 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
430 card_strength, NULL);
431 if (err)
432 return;
Adrian Hunter3853a042015-02-06 14:12:56 +0200433 card->drive_strength = drive_strength;
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200434 }
Philip Rakitya303c532011-11-14 19:14:38 -0800435
Adrian Hunterb4f30a12015-02-06 14:12:52 +0200436 if (drv_type)
437 mmc_set_driver_type(card->host, drv_type);
Philip Rakitya303c532011-11-14 19:14:38 -0800438}
439
440
441static int sdio_set_bus_speed_mode(struct mmc_card *card)
442{
443 unsigned int bus_speed, timing;
444 int err;
445 unsigned char speed;
446
447 /*
448 * If the host doesn't support any of the UHS-I modes, fallback on
449 * default speed.
450 */
Sujit Reddy Thumma41875e32012-12-04 17:06:19 +0530451 if (!mmc_host_uhs(card->host))
Philip Rakitya303c532011-11-14 19:14:38 -0800452 return 0;
453
454 bus_speed = SDIO_SPEED_SDR12;
455 timing = MMC_TIMING_UHS_SDR12;
456 if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
457 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
458 bus_speed = SDIO_SPEED_SDR104;
459 timing = MMC_TIMING_UHS_SDR104;
460 card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
Subhash Jadavani77e2ff02012-12-04 17:06:20 +0530461 card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
Philip Rakitya303c532011-11-14 19:14:38 -0800462 } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
463 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
464 bus_speed = SDIO_SPEED_DDR50;
465 timing = MMC_TIMING_UHS_DDR50;
466 card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
Subhash Jadavani77e2ff02012-12-04 17:06:20 +0530467 card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
Philip Rakitya303c532011-11-14 19:14:38 -0800468 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
469 MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
470 SD_MODE_UHS_SDR50)) {
471 bus_speed = SDIO_SPEED_SDR50;
472 timing = MMC_TIMING_UHS_SDR50;
473 card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
Subhash Jadavani77e2ff02012-12-04 17:06:20 +0530474 card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
Philip Rakitya303c532011-11-14 19:14:38 -0800475 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
476 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
477 (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
478 bus_speed = SDIO_SPEED_SDR25;
479 timing = MMC_TIMING_UHS_SDR25;
480 card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
Subhash Jadavani77e2ff02012-12-04 17:06:20 +0530481 card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
Philip Rakitya303c532011-11-14 19:14:38 -0800482 } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
483 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
484 MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
485 SD_MODE_UHS_SDR12)) {
486 bus_speed = SDIO_SPEED_SDR12;
487 timing = MMC_TIMING_UHS_SDR12;
488 card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
Subhash Jadavani77e2ff02012-12-04 17:06:20 +0530489 card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
Philip Rakitya303c532011-11-14 19:14:38 -0800490 }
491
492 err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
493 if (err)
494 return err;
495
496 speed &= ~SDIO_SPEED_BSS_MASK;
497 speed |= bus_speed;
498 err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
499 if (err)
500 return err;
501
502 if (bus_speed) {
503 mmc_set_timing(card->host, timing);
504 mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
505 }
506
507 return 0;
508}
509
510/*
511 * UHS-I specific initialization procedure
512 */
513static int mmc_sdio_init_uhs_card(struct mmc_card *card)
514{
515 int err;
516
517 if (!card->scr.sda_spec3)
518 return 0;
519
520 /*
521 * Switch to wider bus (if supported).
522 */
NeilBrown303dbed2015-02-24 13:42:23 +1100523 if (card->host->caps & MMC_CAP_4_BIT_DATA)
Philip Rakitya303c532011-11-14 19:14:38 -0800524 err = sdio_enable_4bit_bus(card);
Philip Rakitya303c532011-11-14 19:14:38 -0800525
526 /* Set the driver strength for the card */
527 sdio_select_driver_type(card);
528
529 /* Set bus speed mode of the card */
530 err = sdio_set_bus_speed_mode(card);
531 if (err)
532 goto out;
533
Fredrik Soderstedt810e08e2013-04-17 13:50:53 +0200534 /*
535 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
536 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
537 */
Adrian Hunter63e415c2014-12-05 19:40:59 +0200538 if (!mmc_host_is_spi(card->host) &&
Carlo Caionee10c3212016-01-13 09:36:55 +0100539 ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
540 (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
Adrian Hunter63e415c2014-12-05 19:40:59 +0200541 err = mmc_execute_tuning(card);
Philip Rakitya303c532011-11-14 19:14:38 -0800542out:
Philip Rakitya303c532011-11-14 19:14:38 -0800543 return err;
544}
545
Shawn Lin0eb51a52017-01-09 16:56:19 +0800546static void mmc_sdio_resend_if_cond(struct mmc_host *host,
547 struct mmc_card *card)
548{
549 sdio_reset(host);
550 mmc_go_idle(host);
551 mmc_send_if_cond(host, host->ocr_avail);
552 mmc_remove_card(card);
553}
554
Pierre Ossmand16f5772008-08-31 17:22:46 +0200555/*
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700556 * Handle the detection and initialisation of a card.
557 *
558 * In the case of a resume, "oldcard" will contain the card
559 * we're trying to reinitialise.
560 */
561static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
Chris Ball3bca4cf72010-03-05 13:43:33 -0800562 struct mmc_card *oldcard, int powered_resume)
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700563{
564 struct mmc_card *card;
565 int err;
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100566 int retries = 10;
Ulf Hanssondb4a0d02013-09-13 10:49:34 +0200567 u32 rocr = 0;
Ulf Hansson69041152013-09-13 11:31:33 +0200568 u32 ocr_card = ocr;
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700569
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700570 WARN_ON(!host->claimed);
571
Ulf Hanssondb4a0d02013-09-13 10:49:34 +0200572 /* to query card if 1.8V signalling is supported */
573 if (mmc_host_uhs(host))
574 ocr |= R4_18V_PRESENT;
575
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100576try_again:
577 if (!retries) {
Joe Perches66061102014-09-12 14:56:56 -0700578 pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100579 ocr &= ~R4_18V_PRESENT;
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100580 }
581
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700582 /*
583 * Inform the card of the voltage
584 */
Chris Ball3bca4cf72010-03-05 13:43:33 -0800585 if (!powered_resume) {
Ulf Hanssondb4a0d02013-09-13 10:49:34 +0200586 err = mmc_send_io_op_cond(host, ocr, &rocr);
Chris Ball3bca4cf72010-03-05 13:43:33 -0800587 if (err)
588 goto err;
589 }
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700590
591 /*
592 * For SPI, enable CRC as appropriate.
593 */
594 if (mmc_host_is_spi(host)) {
595 err = mmc_spi_set_crc(host, use_spi_crc);
596 if (err)
597 goto err;
598 }
599
600 /*
601 * Allocate card structure.
602 */
603 card = mmc_alloc_card(host, NULL);
604 if (IS_ERR(card)) {
605 err = PTR_ERR(card);
606 goto err;
607 }
608
Ulf Hanssondb4a0d02013-09-13 10:49:34 +0200609 if ((rocr & R4_MEMORY_PRESENT) &&
610 mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) {
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700611 card->type = MMC_TYPE_SD_COMBO;
612
613 if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
614 memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
615 mmc_remove_card(card);
616 return -ENOENT;
617 }
618 } else {
619 card->type = MMC_TYPE_SDIO;
620
621 if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
622 mmc_remove_card(card);
623 return -ENOENT;
624 }
625 }
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700626
627 /*
Daniel Mack3fcb0272010-04-01 10:03:25 +0200628 * Call the optional HC's init_card function to handle quirks.
629 */
630 if (host->ops->init_card)
631 host->ops->init_card(host, card);
632
633 /*
Philip Rakitya303c532011-11-14 19:14:38 -0800634 * If the host and card support UHS-I mode request the card
635 * to switch to 1.8V signaling level. No 1.8v signalling if
Masanari Iida7122bbb2012-08-05 23:25:40 +0900636 * UHS mode is not enabled to maintain compatibility and some
Philip Rakitya303c532011-11-14 19:14:38 -0800637 * systems that claim 1.8v signalling in fact do not support
Shawn Lin5fc3d802017-01-09 16:56:20 +0800638 * it. Per SDIO spec v3, section 3.1.2, if the voltage is already
639 * 1.8v, the card sets S18A to 0 in the R4 response. So it will
640 * fails to check rocr & R4_18V_PRESENT, but we still need to
641 * try to init uhs card. sdio_read_cccr will take over this task
642 * to make sure which speed mode should work.
Philip Rakitya303c532011-11-14 19:14:38 -0800643 */
Ulf Hanssondb4a0d02013-09-13 10:49:34 +0200644 if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) {
Ulf Hansson0f791fd2013-09-12 15:36:34 +0200645 err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
Adrian Hunterd9bfbb92015-11-26 14:00:47 +0200646 ocr_card);
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100647 if (err == -EAGAIN) {
Shawn Lin0eb51a52017-01-09 16:56:19 +0800648 mmc_sdio_resend_if_cond(host, card);
Johan Rudholm0797e5f2013-01-28 15:08:28 +0100649 retries--;
650 goto try_again;
651 } else if (err) {
Philip Rakitya303c532011-11-14 19:14:38 -0800652 ocr &= ~R4_18V_PRESENT;
Philip Rakitya303c532011-11-14 19:14:38 -0800653 }
Philip Rakitya303c532011-11-14 19:14:38 -0800654 }
655
656 /*
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700657 * For native busses: set card RCA and quit open drain mode.
658 */
Chris Ball3bca4cf72010-03-05 13:43:33 -0800659 if (!powered_resume && !mmc_host_is_spi(host)) {
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700660 err = mmc_send_relative_addr(host, &card->rca);
661 if (err)
662 goto remove;
663
Stefan Nilsson XK0aab3992011-03-01 14:41:04 +0100664 /*
665 * Update oldcard with the new RCA received from the SDIO
666 * device -- we're doing this so that it's updated in the
667 * "card" struct when oldcard overwrites that later.
668 */
669 if (oldcard)
670 oldcard->rca = card->rca;
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700671 }
672
673 /*
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700674 * Read CSD, before selecting the card
675 */
676 if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
677 err = mmc_sd_get_csd(host, card);
678 if (err)
679 return err;
680
681 mmc_decode_cid(card);
682 }
683
684 /*
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700685 * Select card, as all following commands rely on that.
686 */
Chris Ball3bca4cf72010-03-05 13:43:33 -0800687 if (!powered_resume && !mmc_host_is_spi(host)) {
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700688 err = mmc_select_card(card);
689 if (err)
690 goto remove;
691 }
692
Grazvydas Ignotas6f51be32010-08-10 18:01:50 -0700693 if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
694 /*
695 * This is non-standard SDIO device, meaning it doesn't
696 * have any CIA (Common I/O area) registers present.
697 * It's host's responsibility to fill cccr and cis
698 * structures in init_card().
699 */
700 mmc_set_clock(host, card->cis.max_dtr);
701
702 if (card->cccr.high_speed) {
Grazvydas Ignotas6f51be32010-08-10 18:01:50 -0700703 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
704 }
705
706 goto finish;
707 }
708
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700709 /*
Shawn Lin5fc3d802017-01-09 16:56:20 +0800710 * Read the common registers. Note that we should try to
711 * validate whether UHS would work or not.
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700712 */
Philip Rakity2d0d68f2012-01-26 06:57:10 -0800713 err = sdio_read_cccr(card, ocr);
Shawn Lin5fc3d802017-01-09 16:56:20 +0800714 if (err) {
715 mmc_sdio_resend_if_cond(host, card);
716 if (ocr & R4_18V_PRESENT) {
717 /* Retry init sequence, but without R4_18V_PRESENT. */
718 retries = 0;
719 goto try_again;
720 } else {
721 goto remove;
722 }
723 }
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700724
725 /*
726 * Read the common CIS tuples.
727 */
728 err = sdio_read_common_cis(card);
729 if (err)
730 goto remove;
731
732 if (oldcard) {
733 int same = (card->cis.vendor == oldcard->cis.vendor &&
734 card->cis.device == oldcard->cis.device);
735 mmc_remove_card(card);
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700736 if (!same)
737 return -ENOENT;
738
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700739 card = oldcard;
740 }
Ulf Hansson69041152013-09-13 11:31:33 +0200741 card->ocr = ocr_card;
Andrei Warkentin32780cd2011-04-11 17:02:15 -0500742 mmc_fixup_device(card, NULL);
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700743
Michal Miroslaw7310ece82010-08-10 18:01:40 -0700744 if (card->type == MMC_TYPE_SD_COMBO) {
745 err = mmc_sd_setup_card(host, card, oldcard != NULL);
746 /* handle as SDIO-only card if memory init failed */
747 if (err) {
748 mmc_go_idle(host);
749 if (mmc_host_is_spi(host))
750 /* should not fail, as it worked previously */
751 mmc_spi_set_crc(host, use_spi_crc);
752 card->type = MMC_TYPE_SDIO;
753 } else
754 card->dev.type = &sd_type;
755 }
756
757 /*
758 * If needed, disconnect card detection pull-up resistor.
759 */
760 err = sdio_disable_cd(card);
761 if (err)
762 goto remove;
763
Philip Rakitya303c532011-11-14 19:14:38 -0800764 /* Initialization sequence for UHS-I cards */
765 /* Only if card supports 1.8v and UHS signaling */
766 if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
767 err = mmc_sdio_init_uhs_card(card);
768 if (err)
769 goto remove;
Philip Rakitya303c532011-11-14 19:14:38 -0800770 } else {
771 /*
772 * Switch to high-speed (if supported).
773 */
774 err = sdio_enable_hs(card);
775 if (err > 0)
Seungwon Jeoncdc99172014-04-23 17:07:35 +0900776 mmc_set_timing(card->host, MMC_TIMING_SD_HS);
Philip Rakitya303c532011-11-14 19:14:38 -0800777 else if (err)
778 goto remove;
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700779
Philip Rakitya303c532011-11-14 19:14:38 -0800780 /*
781 * Change to the card's maximum speed.
782 */
783 mmc_set_clock(host, mmc_sdio_get_max_clock(card));
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700784
Philip Rakitya303c532011-11-14 19:14:38 -0800785 /*
786 * Switch to wider bus (if supported).
787 */
788 err = sdio_enable_4bit_bus(card);
NeilBrown303dbed2015-02-24 13:42:23 +1100789 if (err)
Philip Rakitya303c532011-11-14 19:14:38 -0800790 goto remove;
791 }
Grazvydas Ignotas6f51be32010-08-10 18:01:50 -0700792finish:
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700793 if (!oldcard)
794 host->card = card;
795 return 0;
796
797remove:
798 if (!oldcard)
799 mmc_remove_card(card);
800
801err:
802 return err;
803}
804
805/*
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200806 * Host is being removed. Free up the current card.
807 */
808static void mmc_sdio_remove(struct mmc_host *host)
809{
Pierre Ossmane29a7d72007-05-26 13:48:18 +0200810 int i;
811
Pierre Ossmane29a7d72007-05-26 13:48:18 +0200812 for (i = 0;i < host->card->sdio_funcs;i++) {
813 if (host->card->sdio_func[i]) {
814 sdio_remove_func(host->card->sdio_func[i]);
815 host->card->sdio_func[i] = NULL;
816 }
817 }
818
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200819 mmc_remove_card(host->card);
820 host->card = NULL;
821}
822
823/*
Adrian Hunterd3049502011-11-28 16:22:00 +0200824 * Card detection - card is alive.
825 */
826static int mmc_sdio_alive(struct mmc_host *host)
827{
828 return mmc_select_card(host->card);
829}
830
831/*
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200832 * Card detection callback from host.
833 */
834static void mmc_sdio_detect(struct mmc_host *host)
835{
836 int err;
837
Ohad Ben-Cohen87973ba2010-10-02 13:54:12 +0200838 /* Make sure card is powered before detecting it */
Ohad Ben-Cohened919b02010-11-19 09:29:09 +0200839 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
840 err = pm_runtime_get_sync(&host->card->dev);
Li Fei3bffb802013-04-08 09:36:39 +0800841 if (err < 0) {
842 pm_runtime_put_noidle(&host->card->dev);
Ohad Ben-Cohened919b02010-11-19 09:29:09 +0200843 goto out;
Li Fei3bffb802013-04-08 09:36:39 +0800844 }
Ohad Ben-Cohened919b02010-11-19 09:29:09 +0200845 }
Ohad Ben-Cohen87973ba2010-10-02 13:54:12 +0200846
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200847 mmc_claim_host(host);
848
849 /*
850 * Just check if our card has been removed.
851 */
Adrian Hunterd3049502011-11-28 16:22:00 +0200852 err = _mmc_detect_card_removed(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200853
854 mmc_release_host(host);
855
Ohad Ben-Cohen4d0812c2010-11-14 12:40:33 +0200856 /*
857 * Tell PM core it's OK to power off the card now.
858 *
859 * The _sync variant is used in order to ensure that the card
860 * is left powered off in case an error occurred, and the card
861 * is going to be removed.
862 *
863 * Since there is no specific reason to believe a new user
864 * is about to show up at this point, the _sync variant is
865 * desirable anyway.
866 */
Ohad Ben-Cohened919b02010-11-19 09:29:09 +0200867 if (host->caps & MMC_CAP_POWER_OFF_CARD)
868 pm_runtime_put_sync(&host->card->dev);
Ohad Ben-Cohen4d0812c2010-11-14 12:40:33 +0200869
Ohad Ben-Cohen87973ba2010-10-02 13:54:12 +0200870out:
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200871 if (err) {
872 mmc_sdio_remove(host);
873
874 mmc_claim_host(host);
875 mmc_detach_bus(host);
Ulf Hansson7f7e4122011-09-21 14:08:13 -0400876 mmc_power_off(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200877 mmc_release_host(host);
878 }
879}
880
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700881/*
Ulf Hansson810cadd2013-06-10 17:03:37 +0200882 * SDIO pre_suspend. We need to suspend all functions separately.
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700883 * Therefore all registered functions must have drivers with suspend
884 * and resume methods. Failing that we simply remove the whole card.
885 */
Ulf Hansson810cadd2013-06-10 17:03:37 +0200886static int mmc_sdio_pre_suspend(struct mmc_host *host)
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700887{
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700888 int i, err = 0;
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700889
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700890 for (i = 0; i < host->card->sdio_funcs; i++) {
891 struct sdio_func *func = host->card->sdio_func[i];
892 if (func && sdio_func_present(func) && func->dev.driver) {
893 const struct dev_pm_ops *pmops = func->dev.driver->pm;
894 if (!pmops || !pmops->suspend || !pmops->resume) {
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700895 /* force removal of entire card in that case */
896 err = -ENOSYS;
Ulf Hansson810cadd2013-06-10 17:03:37 +0200897 break;
898 }
899 }
900 }
901
902 return err;
903}
904
905/*
906 * SDIO suspend. Suspend all functions separately.
907 */
908static int mmc_sdio_suspend(struct mmc_host *host)
909{
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +0200910 mmc_claim_host(host);
911
912 if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
Daniel Drake6b5eda32010-03-05 13:43:34 -0800913 sdio_disable_wide(host->card);
Daniel Drake6b5eda32010-03-05 13:43:34 -0800914
Adrian Hunter79d5a652015-05-07 13:10:13 +0300915 if (!mmc_card_keep_power(host)) {
Ulf Hansson74590262013-06-10 17:03:38 +0200916 mmc_power_off(host);
Adrian Hunter79d5a652015-05-07 13:10:13 +0300917 } else if (host->retune_period) {
918 mmc_retune_timer_stop(host);
919 mmc_retune_needed(host);
920 }
Ulf Hansson74590262013-06-10 17:03:38 +0200921
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +0200922 mmc_release_host(host);
923
Ulf Hansson573185c2014-02-28 12:49:00 +0100924 return 0;
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700925}
926
927static int mmc_sdio_resume(struct mmc_host *host)
928{
Ulf Hansson573185c2014-02-28 12:49:00 +0100929 int err = 0;
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700930
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700931 /* Basic card reinitialization. */
932 mmc_claim_host(host);
Ohad Ben-Cohen080bc972010-11-28 07:21:29 +0200933
Ulf Hansson74590262013-06-10 17:03:38 +0200934 /* Restore power if needed */
935 if (!mmc_card_keep_power(host)) {
Ulf Hansson69041152013-09-13 11:31:33 +0200936 mmc_power_up(host, host->card->ocr);
Ulf Hansson74590262013-06-10 17:03:38 +0200937 /*
938 * Tell runtime PM core we just powered up the card,
939 * since it still believes the card is powered off.
940 * Note that currently runtime PM is only enabled
941 * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
942 */
943 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
944 pm_runtime_disable(&host->card->dev);
945 pm_runtime_set_active(&host->card->dev);
946 pm_runtime_enable(&host->card->dev);
947 }
948 }
949
Ohad Ben-Cohen080bc972010-11-28 07:21:29 +0200950 /* No need to reinitialize powered-resumed nonremovable cards */
Subhash Jadavani51aa66a2012-12-04 17:06:18 +0530951 if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) {
952 sdio_reset(host);
953 mmc_go_idle(host);
NeilBrown006fc512014-11-12 14:55:19 +1100954 mmc_send_if_cond(host, host->card->ocr);
955 err = mmc_send_io_op_cond(host, 0, NULL);
956 if (!err)
957 err = mmc_sdio_init_card(host, host->card->ocr,
958 host->card,
959 mmc_card_keep_power(host));
Subhash Jadavani51aa66a2012-12-04 17:06:18 +0530960 } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
Ohad Ben-Cohen080bc972010-11-28 07:21:29 +0200961 /* We may have switched to 1-bit mode during suspend */
962 err = sdio_enable_4bit_bus(host->card);
Ohad Ben-Cohen080bc972010-11-28 07:21:29 +0200963 }
964
Fu Zhonghuidea67c42014-08-18 10:48:14 +0800965 if (!err && host->sdio_irqs) {
Ulf Hansson9eadcc02015-10-02 10:56:11 +0200966 if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
Fu Zhonghuidea67c42014-08-18 10:48:14 +0800967 wake_up_process(host->sdio_irq_thread);
Ulf Hansson9eadcc02015-10-02 10:56:11 +0200968 else if (host->caps & MMC_CAP_SDIO_IRQ)
Fu Zhonghuidea67c42014-08-18 10:48:14 +0800969 host->ops->enable_sdio_irq(host, 1);
Fu Zhonghuidea67c42014-08-18 10:48:14 +0800970 }
971
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700972 mmc_release_host(host);
973
Ulf Hansson74590262013-06-10 17:03:38 +0200974 host->pm_flags &= ~MMC_PM_KEEP_POWER;
Nicolas Pitre95cdfb72009-09-22 16:45:29 -0700975 return err;
Nicolas Pitre17d33e12009-09-22 16:45:28 -0700976}
Pierre Ossman5c4e6f12007-05-21 20:23:20 +0200977
Ohad Ben-Cohend3fe37b2010-10-02 13:54:07 +0200978static int mmc_sdio_power_restore(struct mmc_host *host)
979{
980 int ret;
981
Ohad Ben-Cohend3fe37b2010-10-02 13:54:07 +0200982 mmc_claim_host(host);
Daniel Drakec6e633a2011-06-25 19:20:11 +0100983
984 /*
985 * Reset the card by performing the same steps that are taken by
986 * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe.
987 *
988 * sdio_reset() is technically not needed. Having just powered up the
989 * hardware, it should already be in reset state. However, some
990 * platforms (such as SD8686 on OLPC) do not instantly cut power,
991 * meaning that a reset is required when restoring power soon after
992 * powering off. It is harmless in other cases.
993 *
994 * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec,
995 * is not necessary for non-removable cards. However, it is required
996 * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and
997 * harmless in other situations.
998 *
Daniel Drakec6e633a2011-06-25 19:20:11 +0100999 */
Ulf Hanssone7747472012-03-01 13:18:05 +01001000
Daniel Drakec6e633a2011-06-25 19:20:11 +01001001 sdio_reset(host);
1002 mmc_go_idle(host);
NeilBrown59b6c9e2014-11-12 14:55:19 +11001003 mmc_send_if_cond(host, host->card->ocr);
Daniel Drakec6e633a2011-06-25 19:20:11 +01001004
Ulf Hanssonce69d372013-09-16 11:28:42 +02001005 ret = mmc_send_io_op_cond(host, 0, NULL);
Daniel Drakec6e633a2011-06-25 19:20:11 +01001006 if (ret)
1007 goto out;
1008
Ulf Hanssonce69d372013-09-16 11:28:42 +02001009 ret = mmc_sdio_init_card(host, host->card->ocr, host->card,
Ohad Ben-Cohena5e94252011-04-05 17:43:20 +03001010 mmc_card_keep_power(host));
Ohad Ben-Cohend3fe37b2010-10-02 13:54:07 +02001011 if (!ret && host->sdio_irqs)
1012 mmc_signal_sdio_irq(host);
Daniel Drakec6e633a2011-06-25 19:20:11 +01001013
1014out:
Ohad Ben-Cohend3fe37b2010-10-02 13:54:07 +02001015 mmc_release_host(host);
1016
1017 return ret;
1018}
1019
Ulf Hansson12d01d02013-05-02 14:02:37 +02001020static int mmc_sdio_runtime_suspend(struct mmc_host *host)
1021{
1022 /* No references to the card, cut the power to it. */
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +02001023 mmc_claim_host(host);
Ulf Hansson12d01d02013-05-02 14:02:37 +02001024 mmc_power_off(host);
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +02001025 mmc_release_host(host);
1026
Ulf Hansson12d01d02013-05-02 14:02:37 +02001027 return 0;
1028}
1029
1030static int mmc_sdio_runtime_resume(struct mmc_host *host)
1031{
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +02001032 int ret;
1033
Ulf Hansson12d01d02013-05-02 14:02:37 +02001034 /* Restore power and re-initialize. */
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +02001035 mmc_claim_host(host);
Ulf Hansson69041152013-09-13 11:31:33 +02001036 mmc_power_up(host, host->card->ocr);
Ulf Hansson8d1ffc8c2015-09-11 14:41:55 +02001037 ret = mmc_sdio_power_restore(host);
1038 mmc_release_host(host);
1039
1040 return ret;
Ulf Hansson12d01d02013-05-02 14:02:37 +02001041}
1042
Andreas Fenkart1fb654f2015-04-23 13:15:42 +02001043static int mmc_sdio_reset(struct mmc_host *host)
1044{
1045 mmc_power_cycle(host, host->card->ocr);
1046 return mmc_sdio_power_restore(host);
1047}
1048
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001049static const struct mmc_bus_ops mmc_sdio_ops = {
1050 .remove = mmc_sdio_remove,
1051 .detect = mmc_sdio_detect,
Ulf Hansson810cadd2013-06-10 17:03:37 +02001052 .pre_suspend = mmc_sdio_pre_suspend,
Nicolas Pitre17d33e12009-09-22 16:45:28 -07001053 .suspend = mmc_sdio_suspend,
1054 .resume = mmc_sdio_resume,
Ulf Hansson12d01d02013-05-02 14:02:37 +02001055 .runtime_suspend = mmc_sdio_runtime_suspend,
1056 .runtime_resume = mmc_sdio_runtime_resume,
Ohad Ben-Cohend3fe37b2010-10-02 13:54:07 +02001057 .power_restore = mmc_sdio_power_restore,
Adrian Hunterd3049502011-11-28 16:22:00 +02001058 .alive = mmc_sdio_alive,
Andreas Fenkart1fb654f2015-04-23 13:15:42 +02001059 .reset = mmc_sdio_reset,
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001060};
1061
1062
1063/*
1064 * Starting point for SDIO card init.
1065 */
Andy Ross807e8e42011-01-03 10:36:56 -08001066int mmc_attach_sdio(struct mmc_host *host)
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001067{
Andy Ross807e8e42011-01-03 10:36:56 -08001068 int err, i, funcs;
Ulf Hansson69041152013-09-13 11:31:33 +02001069 u32 ocr, rocr;
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001070 struct mmc_card *card;
1071
Pierre Ossmand84075c82007-08-09 13:23:56 +02001072 WARN_ON(!host->claimed);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001073
Andy Ross807e8e42011-01-03 10:36:56 -08001074 err = mmc_send_io_op_cond(host, 0, &ocr);
1075 if (err)
1076 return err;
1077
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001078 mmc_attach_bus(host, &mmc_sdio_ops);
Takashi Iwai8f230f42010-12-08 10:04:30 +01001079 if (host->ocr_avail_sdio)
1080 host->ocr_avail = host->ocr_avail_sdio;
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001081
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001082
Ulf Hansson69041152013-09-13 11:31:33 +02001083 rocr = mmc_select_voltage(host, ocr);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001084
1085 /*
1086 * Can we support the voltage(s) of the card(s)?
1087 */
Ulf Hansson69041152013-09-13 11:31:33 +02001088 if (!rocr) {
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001089 err = -EINVAL;
1090 goto err;
1091 }
1092
1093 /*
Nicolas Pitre17d33e12009-09-22 16:45:28 -07001094 * Detect and init the card.
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001095 */
Ulf Hansson69041152013-09-13 11:31:33 +02001096 err = mmc_sdio_init_card(host, rocr, NULL, 0);
Ulf Hanssonec2ed702013-09-12 16:38:56 +02001097 if (err)
1098 goto err;
1099
Nicolas Pitre17d33e12009-09-22 16:45:28 -07001100 card = host->card;
David Brownellaf517152007-08-08 09:11:32 -07001101
1102 /*
Ohad Ben-Cohened919b02010-11-19 09:29:09 +02001103 * Enable runtime PM only if supported by host+card+board
Ohad Ben-Cohen819685612010-10-02 13:54:10 +02001104 */
Ohad Ben-Cohened919b02010-11-19 09:29:09 +02001105 if (host->caps & MMC_CAP_POWER_OFF_CARD) {
1106 /*
1107 * Let runtime PM core know our card is active
1108 */
1109 err = pm_runtime_set_active(&card->dev);
1110 if (err)
1111 goto remove;
Ohad Ben-Cohen819685612010-10-02 13:54:10 +02001112
Ohad Ben-Cohened919b02010-11-19 09:29:09 +02001113 /*
1114 * Enable runtime PM for this card
1115 */
1116 pm_runtime_enable(&card->dev);
1117 }
Ohad Ben-Cohen819685612010-10-02 13:54:10 +02001118
1119 /*
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001120 * The number of functions on the card is encoded inside
1121 * the ocr.
1122 */
Matt Fleminge8812792009-12-17 15:27:18 -08001123 funcs = (ocr & 0x70000000) >> 28;
1124 card->sdio_funcs = 0;
Pierre Ossman4ff64712007-07-30 18:23:53 +02001125
1126 /*
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001127 * Initialize (but don't add) all present functions.
1128 */
Matt Fleminge8812792009-12-17 15:27:18 -08001129 for (i = 0; i < funcs; i++, card->sdio_funcs++) {
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001130 err = sdio_init_func(host->card, i + 1);
1131 if (err)
1132 goto remove;
Ohad Ben-Cohen40bba0c2010-10-02 13:54:11 +02001133
1134 /*
Ohad Ben-Cohened919b02010-11-19 09:29:09 +02001135 * Enable Runtime PM for this func (if supported)
Ohad Ben-Cohen40bba0c2010-10-02 13:54:11 +02001136 */
Ohad Ben-Cohened919b02010-11-19 09:29:09 +02001137 if (host->caps & MMC_CAP_POWER_OFF_CARD)
1138 pm_runtime_enable(&card->sdio_func[i]->dev);
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001139 }
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001140
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001141 /*
1142 * First add the card to the driver model...
1143 */
Andy Ross807e8e42011-01-03 10:36:56 -08001144 mmc_release_host(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001145 err = mmc_add_card(host->card);
1146 if (err)
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001147 goto remove_added;
1148
1149 /*
1150 * ...then the SDIO functions.
1151 */
1152 for (i = 0;i < funcs;i++) {
1153 err = sdio_add_func(host->card->sdio_func[i]);
1154 if (err)
1155 goto remove_added;
1156 }
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001157
Dmitry Shmidt34497912011-03-03 17:40:10 -05001158 mmc_claim_host(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001159 return 0;
1160
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001161
1162remove_added:
1163 /* Remove without lock if the device has been added. */
1164 mmc_sdio_remove(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001165 mmc_claim_host(host);
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001166remove:
1167 /* And with lock if it hasn't been added. */
Andy Ross807e8e42011-01-03 10:36:56 -08001168 mmc_release_host(host);
Pierre Ossmane29a7d72007-05-26 13:48:18 +02001169 if (host->card)
1170 mmc_sdio_remove(host);
Andy Ross807e8e42011-01-03 10:36:56 -08001171 mmc_claim_host(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001172err:
1173 mmc_detach_bus(host);
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001174
Girish K Sa3c76eb2011-10-11 11:44:09 +05301175 pr_err("%s: error %d whilst initialising SDIO card\n",
Pierre Ossman5c4e6f12007-05-21 20:23:20 +02001176 mmc_hostname(host), err);
1177
1178 return err;
1179}
1180