Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 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> |
Ohad Ben-Cohen | 81968561 | 2010-10-02 13:54:10 +0200 | [diff] [blame] | 13 | #include <linux/pm_runtime.h> |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 14 | |
| 15 | #include <linux/mmc/host.h> |
| 16 | #include <linux/mmc/card.h> |
Girish K S | a4924c7 | 2012-01-11 14:04:52 -0500 | [diff] [blame] | 17 | #include <linux/mmc/mmc.h> |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 18 | #include <linux/mmc/sdio.h> |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 19 | #include <linux/mmc/sdio_func.h> |
Ohad Ben-Cohen | eab4068 | 2011-04-05 17:50:14 +0300 | [diff] [blame] | 20 | #include <linux/mmc/sdio_ids.h> |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 21 | |
| 22 | #include "core.h" |
Ulf Hansson | 4facdde | 2017-01-13 14:14:14 +0100 | [diff] [blame] | 23 | #include "card.h" |
Ulf Hansson | 5857b29 | 2017-01-13 14:14:15 +0100 | [diff] [blame] | 24 | #include "host.h" |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 25 | #include "bus.h" |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 26 | #include "sd.h" |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 27 | #include "sdio_bus.h" |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 28 | #include "mmc_ops.h" |
| 29 | #include "sd_ops.h" |
| 30 | #include "sdio_ops.h" |
Nicolas Pitre | b726126 | 2007-06-16 02:04:16 -0400 | [diff] [blame] | 31 | #include "sdio_cis.h" |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 32 | |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 33 | static int sdio_read_fbr(struct sdio_func *func) |
| 34 | { |
| 35 | int ret; |
| 36 | unsigned char data; |
| 37 | |
Ohad Ben-Cohen | eab4068 | 2011-04-05 17:50:14 +0300 | [diff] [blame] | 38 | if (mmc_card_nonstd_func_interface(func->card)) { |
| 39 | func->class = SDIO_CLASS_NONE; |
| 40 | return 0; |
| 41 | } |
| 42 | |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 43 | ret = mmc_io_rw_direct(func->card, 0, 0, |
David Vrabel | 7616ee9 | 2007-08-08 14:23:05 +0100 | [diff] [blame] | 44 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data); |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 45 | 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 Vrabel | 7616ee9 | 2007-08-08 14:23:05 +0100 | [diff] [blame] | 52 | SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data); |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 53 | if (ret) |
| 54 | goto out; |
| 55 | } |
| 56 | |
| 57 | func->class = data; |
| 58 | |
| 59 | out: |
| 60 | return ret; |
| 61 | } |
| 62 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 63 | static int sdio_init_func(struct mmc_card *card, unsigned int fn) |
| 64 | { |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 65 | int ret; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 66 | struct sdio_func *func; |
| 67 | |
Shawn Lin | 5df0e823 | 2016-11-02 15:24:00 +0800 | [diff] [blame] | 68 | if (WARN_ON(fn > SDIO_MAX_FUNCS)) |
| 69 | return -EINVAL; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 70 | |
| 71 | func = sdio_alloc_func(card); |
| 72 | if (IS_ERR(func)) |
| 73 | return PTR_ERR(func); |
| 74 | |
| 75 | func->num = fn; |
| 76 | |
Grazvydas Ignotas | 6f51be3 | 2010-08-10 18:01:50 -0700 | [diff] [blame] | 77 | if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) { |
| 78 | ret = sdio_read_fbr(func); |
| 79 | if (ret) |
| 80 | goto fail; |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 81 | |
Grazvydas Ignotas | 6f51be3 | 2010-08-10 18:01:50 -0700 | [diff] [blame] | 82 | 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 Pitre | b726126 | 2007-06-16 02:04:16 -0400 | [diff] [blame] | 90 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 91 | card->sdio_func[fn - 1] = func; |
| 92 | |
| 93 | return 0; |
Pierre Ossman | 0597007 | 2007-06-11 21:01:00 +0200 | [diff] [blame] | 94 | |
| 95 | fail: |
| 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 Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 102 | } |
| 103 | |
Philip Rakity | 2d0d68f | 2012-01-26 06:57:10 -0800 | [diff] [blame] | 104 | static int sdio_read_cccr(struct mmc_card *card, u32 ocr) |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 105 | { |
| 106 | int ret; |
| 107 | int cccr_vsn; |
Philip Rakity | 2d0d68f | 2012-01-26 06:57:10 -0800 | [diff] [blame] | 108 | int uhs = ocr & R4_18V_PRESENT; |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 109 | unsigned char data; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 110 | unsigned char speed; |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 111 | |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 112 | 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 Zhao | b4625da | 2011-10-20 19:16:32 -0700 | [diff] [blame] | 118 | if (cccr_vsn > SDIO_CCCR_REV_3_00) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 119 | pr_err("%s: unrecognised CCCR structure version %d\n", |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 120 | 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 Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 147 | ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed); |
Pierre Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 148 | if (ret) |
| 149 | goto out; |
| 150 | |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 151 | card->scr.sda_spec3 = 0; |
| 152 | card->sw_caps.sd3_bus_mode = 0; |
| 153 | card->sw_caps.sd3_drv_type = 0; |
Philip Rakity | 2d0d68f | 2012-01-26 06:57:10 -0800 | [diff] [blame] | 154 | if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) { |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 155 | 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 Thumma | 41875e3 | 2012-12-04 17:06:19 +0530 | [diff] [blame] | 161 | if (mmc_host_uhs(card->host)) { |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 162 | 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 Ossman | 35c66c1 | 2007-06-11 20:25:43 +0200 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | out: |
| 201 | return ret; |
| 202 | } |
| 203 | |
Pierre Ossman | 4ff6471 | 2007-07-30 18:23:53 +0200 | [diff] [blame] | 204 | static 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 Ding | 2a0fe91 | 2012-05-15 13:09:43 +0800 | [diff] [blame] | 219 | if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED) |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 220 | pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n", |
| 221 | mmc_hostname(card->host), ctrl); |
Yong Ding | 2a0fe91 | 2012-05-15 13:09:43 +0800 | [diff] [blame] | 222 | |
| 223 | /* set as 4-bit bus width */ |
| 224 | ctrl &= ~SDIO_BUS_WIDTH_MASK; |
Pierre Ossman | 4ff6471 | 2007-07-30 18:23:53 +0200 | [diff] [blame] | 225 | 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 Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 231 | return 1; |
Pierre Ossman | 4ff6471 | 2007-07-30 18:23:53 +0200 | [diff] [blame] | 232 | } |
| 233 | |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 234 | /* |
Ohad Ben-Cohen | 006ebd5 | 2009-09-22 16:45:07 -0700 | [diff] [blame] | 235 | * 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 | */ |
| 240 | static int sdio_disable_cd(struct mmc_card *card) |
| 241 | { |
| 242 | int ret; |
| 243 | u8 ctrl; |
| 244 | |
Ohad Ben-Cohen | 2059a02 | 2011-04-05 18:02:25 +0300 | [diff] [blame] | 245 | if (!mmc_card_disable_cd(card)) |
Ohad Ben-Cohen | 006ebd5 | 2009-09-22 16:45:07 -0700 | [diff] [blame] | 246 | 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 Drake | 6b5eda3 | 2010-03-05 13:43:34 -0800 | [diff] [blame] | 258 | * Devices that remain active during a system suspend are |
| 259 | * put back into 1-bit mode. |
| 260 | */ |
| 261 | static 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 Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 291 | |
| 292 | static int sdio_enable_4bit_bus(struct mmc_card *card) |
| 293 | { |
| 294 | int err; |
| 295 | |
| 296 | if (card->type == MMC_TYPE_SDIO) |
NeilBrown | 303dbed | 2015-02-24 13:42:23 +1100 | [diff] [blame] | 297 | 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 Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 300 | err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); |
| 301 | if (err) |
| 302 | return err; |
NeilBrown | 303dbed | 2015-02-24 13:42:23 +1100 | [diff] [blame] | 303 | err = sdio_enable_wide(card); |
| 304 | if (err <= 0) |
| 305 | mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 306 | } else |
| 307 | return 0; |
| 308 | |
NeilBrown | 303dbed | 2015-02-24 13:42:23 +1100 | [diff] [blame] | 309 | if (err > 0) { |
| 310 | mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); |
| 311 | err = 0; |
| 312 | } |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 313 | |
| 314 | return err; |
| 315 | } |
| 316 | |
| 317 | |
Daniel Drake | 6b5eda3 | 2010-03-05 13:43:34 -0800 | [diff] [blame] | 318 | /* |
Pierre Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 319 | * Test if the card supports high-speed mode and, if so, switch to it. |
| 320 | */ |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 321 | static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) |
Pierre Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 322 | { |
| 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 Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 336 | if (enable) |
| 337 | speed |= SDIO_SPEED_EHS; |
| 338 | else |
| 339 | speed &= ~SDIO_SPEED_EHS; |
Pierre Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 340 | |
| 341 | ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); |
| 342 | if (ret) |
| 343 | return ret; |
| 344 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 345 | return 1; |
| 346 | } |
Pierre Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 347 | |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 348 | /* |
| 349 | * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. |
| 350 | */ |
| 351 | static 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 Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 366 | static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) |
| 367 | { |
| 368 | unsigned max_dtr; |
| 369 | |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 370 | if (mmc_card_hs(card)) { |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 371 | /* |
| 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 Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 382 | if (card->type == MMC_TYPE_SD_COMBO) |
| 383 | max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); |
| 384 | |
Michal Miroslaw | 71578a1 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 385 | return max_dtr; |
Pierre Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 386 | } |
| 387 | |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 388 | static 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 | |
| 404 | static void sdio_select_driver_type(struct mmc_card *card) |
| 405 | { |
Adrian Hunter | fa021ce | 2015-02-06 14:12:53 +0200 | [diff] [blame] | 406 | int card_drv_type, drive_strength, drv_type; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 407 | unsigned char card_strength; |
| 408 | int err; |
| 409 | |
Adrian Hunter | 3853a04 | 2015-02-06 14:12:56 +0200 | [diff] [blame] | 410 | card->drive_strength = 0; |
| 411 | |
Adrian Hunter | fa021ce | 2015-02-06 14:12:53 +0200 | [diff] [blame] | 412 | card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 413 | |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 414 | drive_strength = mmc_select_drive_strength(card, |
| 415 | card->sw_caps.uhs_max_dtr, |
| 416 | card_drv_type, &drv_type); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 417 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 418 | 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 Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 424 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 425 | card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT); |
| 426 | card_strength |= host_drive_to_sdio_drive(drive_strength); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 427 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 428 | /* 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 Hunter | 3853a04 | 2015-02-06 14:12:56 +0200 | [diff] [blame] | 433 | card->drive_strength = drive_strength; |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 434 | } |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 435 | |
Adrian Hunter | b4f30a1 | 2015-02-06 14:12:52 +0200 | [diff] [blame] | 436 | if (drv_type) |
| 437 | mmc_set_driver_type(card->host, drv_type); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | |
| 441 | static 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 Thumma | 41875e3 | 2012-12-04 17:06:19 +0530 | [diff] [blame] | 451 | if (!mmc_host_uhs(card->host)) |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 452 | 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 Jadavani | 77e2ff0 | 2012-12-04 17:06:20 +0530 | [diff] [blame] | 461 | card->sd_bus_speed = UHS_SDR104_BUS_SPEED; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 462 | } 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 Jadavani | 77e2ff0 | 2012-12-04 17:06:20 +0530 | [diff] [blame] | 467 | card->sd_bus_speed = UHS_DDR50_BUS_SPEED; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 468 | } 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 Jadavani | 77e2ff0 | 2012-12-04 17:06:20 +0530 | [diff] [blame] | 474 | card->sd_bus_speed = UHS_SDR50_BUS_SPEED; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 475 | } 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 Jadavani | 77e2ff0 | 2012-12-04 17:06:20 +0530 | [diff] [blame] | 481 | card->sd_bus_speed = UHS_SDR25_BUS_SPEED; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 482 | } 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 Jadavani | 77e2ff0 | 2012-12-04 17:06:20 +0530 | [diff] [blame] | 489 | card->sd_bus_speed = UHS_SDR12_BUS_SPEED; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 490 | } |
| 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 | */ |
| 513 | static 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 | */ |
NeilBrown | 303dbed | 2015-02-24 13:42:23 +1100 | [diff] [blame] | 523 | if (card->host->caps & MMC_CAP_4_BIT_DATA) |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 524 | err = sdio_enable_4bit_bus(card); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 525 | |
| 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 Soderstedt | 810e08e | 2013-04-17 13:50:53 +0200 | [diff] [blame] | 534 | /* |
| 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 Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 538 | if (!mmc_host_is_spi(card->host) && |
Carlo Caione | e10c321 | 2016-01-13 09:36:55 +0100 | [diff] [blame] | 539 | ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) || |
| 540 | (card->host->ios.timing == MMC_TIMING_UHS_SDR104))) |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 541 | err = mmc_execute_tuning(card); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 542 | out: |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 543 | return err; |
| 544 | } |
| 545 | |
Shawn Lin | 0eb51a5 | 2017-01-09 16:56:19 +0800 | [diff] [blame] | 546 | static 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 Ossman | d16f577 | 2008-08-31 17:22:46 +0200 | [diff] [blame] | 555 | /* |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 556 | * 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 | */ |
| 561 | static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, |
Chris Ball | 3bca4cf7 | 2010-03-05 13:43:33 -0800 | [diff] [blame] | 562 | struct mmc_card *oldcard, int powered_resume) |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 563 | { |
| 564 | struct mmc_card *card; |
| 565 | int err; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 566 | int retries = 10; |
Ulf Hansson | db4a0d0 | 2013-09-13 10:49:34 +0200 | [diff] [blame] | 567 | u32 rocr = 0; |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 568 | u32 ocr_card = ocr; |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 569 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 570 | WARN_ON(!host->claimed); |
| 571 | |
Ulf Hansson | db4a0d0 | 2013-09-13 10:49:34 +0200 | [diff] [blame] | 572 | /* to query card if 1.8V signalling is supported */ |
| 573 | if (mmc_host_uhs(host)) |
| 574 | ocr |= R4_18V_PRESENT; |
| 575 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 576 | try_again: |
| 577 | if (!retries) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 578 | pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host)); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 579 | ocr &= ~R4_18V_PRESENT; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 580 | } |
| 581 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 582 | /* |
| 583 | * Inform the card of the voltage |
| 584 | */ |
Chris Ball | 3bca4cf7 | 2010-03-05 13:43:33 -0800 | [diff] [blame] | 585 | if (!powered_resume) { |
Ulf Hansson | db4a0d0 | 2013-09-13 10:49:34 +0200 | [diff] [blame] | 586 | err = mmc_send_io_op_cond(host, ocr, &rocr); |
Chris Ball | 3bca4cf7 | 2010-03-05 13:43:33 -0800 | [diff] [blame] | 587 | if (err) |
| 588 | goto err; |
| 589 | } |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 590 | |
| 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 Hansson | db4a0d0 | 2013-09-13 10:49:34 +0200 | [diff] [blame] | 609 | if ((rocr & R4_MEMORY_PRESENT) && |
| 610 | mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) { |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 611 | 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 Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 626 | |
| 627 | /* |
Daniel Mack | 3fcb027 | 2010-04-01 10:03:25 +0200 | [diff] [blame] | 628 | * 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 Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 634 | * 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 Iida | 7122bbb | 2012-08-05 23:25:40 +0900 | [diff] [blame] | 636 | * UHS mode is not enabled to maintain compatibility and some |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 637 | * systems that claim 1.8v signalling in fact do not support |
Shawn Lin | 5fc3d80 | 2017-01-09 16:56:20 +0800 | [diff] [blame] | 638 | * 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 Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 643 | */ |
Ulf Hansson | db4a0d0 | 2013-09-13 10:49:34 +0200 | [diff] [blame] | 644 | if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) { |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 645 | err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, |
Adrian Hunter | d9bfbb9 | 2015-11-26 14:00:47 +0200 | [diff] [blame] | 646 | ocr_card); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 647 | if (err == -EAGAIN) { |
Shawn Lin | 0eb51a5 | 2017-01-09 16:56:19 +0800 | [diff] [blame] | 648 | mmc_sdio_resend_if_cond(host, card); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 649 | retries--; |
| 650 | goto try_again; |
| 651 | } else if (err) { |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 652 | ocr &= ~R4_18V_PRESENT; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 653 | } |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | /* |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 657 | * For native busses: set card RCA and quit open drain mode. |
| 658 | */ |
Chris Ball | 3bca4cf7 | 2010-03-05 13:43:33 -0800 | [diff] [blame] | 659 | if (!powered_resume && !mmc_host_is_spi(host)) { |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 660 | err = mmc_send_relative_addr(host, &card->rca); |
| 661 | if (err) |
| 662 | goto remove; |
| 663 | |
Stefan Nilsson XK | 0aab399 | 2011-03-01 14:41:04 +0100 | [diff] [blame] | 664 | /* |
| 665 | * Update oldcard with the new RCA received from the SDIO |
| 666 | * device -- we're doing this so that it's updated in the |
| 667 | * "card" struct when oldcard overwrites that later. |
| 668 | */ |
| 669 | if (oldcard) |
| 670 | oldcard->rca = card->rca; |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | /* |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 674 | * Read CSD, before selecting the card |
| 675 | */ |
| 676 | if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { |
| 677 | err = mmc_sd_get_csd(host, card); |
| 678 | if (err) |
| 679 | return err; |
| 680 | |
| 681 | mmc_decode_cid(card); |
| 682 | } |
| 683 | |
| 684 | /* |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 685 | * Select card, as all following commands rely on that. |
| 686 | */ |
Chris Ball | 3bca4cf7 | 2010-03-05 13:43:33 -0800 | [diff] [blame] | 687 | if (!powered_resume && !mmc_host_is_spi(host)) { |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 688 | err = mmc_select_card(card); |
| 689 | if (err) |
| 690 | goto remove; |
| 691 | } |
| 692 | |
Grazvydas Ignotas | 6f51be3 | 2010-08-10 18:01:50 -0700 | [diff] [blame] | 693 | if (card->quirks & MMC_QUIRK_NONSTD_SDIO) { |
| 694 | /* |
| 695 | * This is non-standard SDIO device, meaning it doesn't |
| 696 | * have any CIA (Common I/O area) registers present. |
| 697 | * It's host's responsibility to fill cccr and cis |
| 698 | * structures in init_card(). |
| 699 | */ |
| 700 | mmc_set_clock(host, card->cis.max_dtr); |
| 701 | |
| 702 | if (card->cccr.high_speed) { |
Grazvydas Ignotas | 6f51be3 | 2010-08-10 18:01:50 -0700 | [diff] [blame] | 703 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
| 704 | } |
| 705 | |
| 706 | goto finish; |
| 707 | } |
| 708 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 709 | /* |
Shawn Lin | 5fc3d80 | 2017-01-09 16:56:20 +0800 | [diff] [blame] | 710 | * Read the common registers. Note that we should try to |
| 711 | * validate whether UHS would work or not. |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 712 | */ |
Philip Rakity | 2d0d68f | 2012-01-26 06:57:10 -0800 | [diff] [blame] | 713 | err = sdio_read_cccr(card, ocr); |
Shawn Lin | 5fc3d80 | 2017-01-09 16:56:20 +0800 | [diff] [blame] | 714 | if (err) { |
| 715 | mmc_sdio_resend_if_cond(host, card); |
| 716 | if (ocr & R4_18V_PRESENT) { |
| 717 | /* Retry init sequence, but without R4_18V_PRESENT. */ |
| 718 | retries = 0; |
| 719 | goto try_again; |
| 720 | } else { |
| 721 | goto remove; |
| 722 | } |
| 723 | } |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 724 | |
| 725 | /* |
| 726 | * Read the common CIS tuples. |
| 727 | */ |
| 728 | err = sdio_read_common_cis(card); |
| 729 | if (err) |
| 730 | goto remove; |
| 731 | |
| 732 | if (oldcard) { |
| 733 | int same = (card->cis.vendor == oldcard->cis.vendor && |
| 734 | card->cis.device == oldcard->cis.device); |
| 735 | mmc_remove_card(card); |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 736 | if (!same) |
| 737 | return -ENOENT; |
| 738 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 739 | card = oldcard; |
| 740 | } |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 741 | card->ocr = ocr_card; |
Andrei Warkentin | 32780cd | 2011-04-11 17:02:15 -0500 | [diff] [blame] | 742 | mmc_fixup_device(card, NULL); |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 743 | |
Michal Miroslaw | 7310ece8 | 2010-08-10 18:01:40 -0700 | [diff] [blame] | 744 | if (card->type == MMC_TYPE_SD_COMBO) { |
| 745 | err = mmc_sd_setup_card(host, card, oldcard != NULL); |
| 746 | /* handle as SDIO-only card if memory init failed */ |
| 747 | if (err) { |
| 748 | mmc_go_idle(host); |
| 749 | if (mmc_host_is_spi(host)) |
| 750 | /* should not fail, as it worked previously */ |
| 751 | mmc_spi_set_crc(host, use_spi_crc); |
| 752 | card->type = MMC_TYPE_SDIO; |
| 753 | } else |
| 754 | card->dev.type = &sd_type; |
| 755 | } |
| 756 | |
| 757 | /* |
| 758 | * If needed, disconnect card detection pull-up resistor. |
| 759 | */ |
| 760 | err = sdio_disable_cd(card); |
| 761 | if (err) |
| 762 | goto remove; |
| 763 | |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 764 | /* Initialization sequence for UHS-I cards */ |
| 765 | /* Only if card supports 1.8v and UHS signaling */ |
| 766 | if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) { |
| 767 | err = mmc_sdio_init_uhs_card(card); |
| 768 | if (err) |
| 769 | goto remove; |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 770 | } else { |
| 771 | /* |
| 772 | * Switch to high-speed (if supported). |
| 773 | */ |
| 774 | err = sdio_enable_hs(card); |
| 775 | if (err > 0) |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 776 | mmc_set_timing(card->host, MMC_TIMING_SD_HS); |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 777 | else if (err) |
| 778 | goto remove; |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 779 | |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 780 | /* |
| 781 | * Change to the card's maximum speed. |
| 782 | */ |
| 783 | mmc_set_clock(host, mmc_sdio_get_max_clock(card)); |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 784 | |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 785 | /* |
| 786 | * Switch to wider bus (if supported). |
| 787 | */ |
| 788 | err = sdio_enable_4bit_bus(card); |
NeilBrown | 303dbed | 2015-02-24 13:42:23 +1100 | [diff] [blame] | 789 | if (err) |
Philip Rakity | a303c53 | 2011-11-14 19:14:38 -0800 | [diff] [blame] | 790 | goto remove; |
| 791 | } |
Grazvydas Ignotas | 6f51be3 | 2010-08-10 18:01:50 -0700 | [diff] [blame] | 792 | finish: |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 793 | if (!oldcard) |
| 794 | host->card = card; |
| 795 | return 0; |
| 796 | |
| 797 | remove: |
| 798 | if (!oldcard) |
| 799 | mmc_remove_card(card); |
| 800 | |
| 801 | err: |
| 802 | return err; |
| 803 | } |
| 804 | |
| 805 | /* |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 806 | * Host is being removed. Free up the current card. |
| 807 | */ |
| 808 | static void mmc_sdio_remove(struct mmc_host *host) |
| 809 | { |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 810 | int i; |
| 811 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 812 | for (i = 0;i < host->card->sdio_funcs;i++) { |
| 813 | if (host->card->sdio_func[i]) { |
| 814 | sdio_remove_func(host->card->sdio_func[i]); |
| 815 | host->card->sdio_func[i] = NULL; |
| 816 | } |
| 817 | } |
| 818 | |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 819 | mmc_remove_card(host->card); |
| 820 | host->card = NULL; |
| 821 | } |
| 822 | |
| 823 | /* |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 824 | * Card detection - card is alive. |
| 825 | */ |
| 826 | static int mmc_sdio_alive(struct mmc_host *host) |
| 827 | { |
| 828 | return mmc_select_card(host->card); |
| 829 | } |
| 830 | |
| 831 | /* |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 832 | * Card detection callback from host. |
| 833 | */ |
| 834 | static void mmc_sdio_detect(struct mmc_host *host) |
| 835 | { |
| 836 | int err; |
| 837 | |
Ohad Ben-Cohen | 87973ba | 2010-10-02 13:54:12 +0200 | [diff] [blame] | 838 | /* Make sure card is powered before detecting it */ |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 839 | if (host->caps & MMC_CAP_POWER_OFF_CARD) { |
| 840 | err = pm_runtime_get_sync(&host->card->dev); |
Li Fei | 3bffb80 | 2013-04-08 09:36:39 +0800 | [diff] [blame] | 841 | if (err < 0) { |
| 842 | pm_runtime_put_noidle(&host->card->dev); |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 843 | goto out; |
Li Fei | 3bffb80 | 2013-04-08 09:36:39 +0800 | [diff] [blame] | 844 | } |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 845 | } |
Ohad Ben-Cohen | 87973ba | 2010-10-02 13:54:12 +0200 | [diff] [blame] | 846 | |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 847 | mmc_claim_host(host); |
| 848 | |
| 849 | /* |
| 850 | * Just check if our card has been removed. |
| 851 | */ |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 852 | err = _mmc_detect_card_removed(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 853 | |
| 854 | mmc_release_host(host); |
| 855 | |
Ohad Ben-Cohen | 4d0812c | 2010-11-14 12:40:33 +0200 | [diff] [blame] | 856 | /* |
| 857 | * Tell PM core it's OK to power off the card now. |
| 858 | * |
| 859 | * The _sync variant is used in order to ensure that the card |
| 860 | * is left powered off in case an error occurred, and the card |
| 861 | * is going to be removed. |
| 862 | * |
| 863 | * Since there is no specific reason to believe a new user |
| 864 | * is about to show up at this point, the _sync variant is |
| 865 | * desirable anyway. |
| 866 | */ |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 867 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
| 868 | pm_runtime_put_sync(&host->card->dev); |
Ohad Ben-Cohen | 4d0812c | 2010-11-14 12:40:33 +0200 | [diff] [blame] | 869 | |
Ohad Ben-Cohen | 87973ba | 2010-10-02 13:54:12 +0200 | [diff] [blame] | 870 | out: |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 871 | if (err) { |
| 872 | mmc_sdio_remove(host); |
| 873 | |
| 874 | mmc_claim_host(host); |
| 875 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 876 | mmc_power_off(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 877 | mmc_release_host(host); |
| 878 | } |
| 879 | } |
| 880 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 881 | /* |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 882 | * SDIO pre_suspend. We need to suspend all functions separately. |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 883 | * Therefore all registered functions must have drivers with suspend |
| 884 | * and resume methods. Failing that we simply remove the whole card. |
| 885 | */ |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 886 | static int mmc_sdio_pre_suspend(struct mmc_host *host) |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 887 | { |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 888 | int i, err = 0; |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 889 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 890 | for (i = 0; i < host->card->sdio_funcs; i++) { |
| 891 | struct sdio_func *func = host->card->sdio_func[i]; |
| 892 | if (func && sdio_func_present(func) && func->dev.driver) { |
| 893 | const struct dev_pm_ops *pmops = func->dev.driver->pm; |
| 894 | if (!pmops || !pmops->suspend || !pmops->resume) { |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 895 | /* force removal of entire card in that case */ |
| 896 | err = -ENOSYS; |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 897 | break; |
| 898 | } |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | return err; |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * SDIO suspend. Suspend all functions separately. |
| 907 | */ |
| 908 | static int mmc_sdio_suspend(struct mmc_host *host) |
| 909 | { |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 910 | mmc_claim_host(host); |
| 911 | |
| 912 | if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) |
Daniel Drake | 6b5eda3 | 2010-03-05 13:43:34 -0800 | [diff] [blame] | 913 | sdio_disable_wide(host->card); |
Daniel Drake | 6b5eda3 | 2010-03-05 13:43:34 -0800 | [diff] [blame] | 914 | |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 915 | if (!mmc_card_keep_power(host)) { |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 916 | mmc_power_off(host); |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 917 | } else if (host->retune_period) { |
| 918 | mmc_retune_timer_stop(host); |
| 919 | mmc_retune_needed(host); |
| 920 | } |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 921 | |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 922 | mmc_release_host(host); |
| 923 | |
Ulf Hansson | 573185c | 2014-02-28 12:49:00 +0100 | [diff] [blame] | 924 | return 0; |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | static int mmc_sdio_resume(struct mmc_host *host) |
| 928 | { |
Ulf Hansson | 573185c | 2014-02-28 12:49:00 +0100 | [diff] [blame] | 929 | int err = 0; |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 930 | |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 931 | /* Basic card reinitialization. */ |
| 932 | mmc_claim_host(host); |
Ohad Ben-Cohen | 080bc97 | 2010-11-28 07:21:29 +0200 | [diff] [blame] | 933 | |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 934 | /* Restore power if needed */ |
| 935 | if (!mmc_card_keep_power(host)) { |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 936 | mmc_power_up(host, host->card->ocr); |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 937 | /* |
| 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-Cohen | 080bc97 | 2010-11-28 07:21:29 +0200 | [diff] [blame] | 950 | /* No need to reinitialize powered-resumed nonremovable cards */ |
Subhash Jadavani | 51aa66a | 2012-12-04 17:06:18 +0530 | [diff] [blame] | 951 | if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) { |
| 952 | sdio_reset(host); |
| 953 | mmc_go_idle(host); |
NeilBrown | 006fc51 | 2014-11-12 14:55:19 +1100 | [diff] [blame] | 954 | 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 Jadavani | 51aa66a | 2012-12-04 17:06:18 +0530 | [diff] [blame] | 960 | } else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) { |
Ohad Ben-Cohen | 080bc97 | 2010-11-28 07:21:29 +0200 | [diff] [blame] | 961 | /* We may have switched to 1-bit mode during suspend */ |
| 962 | err = sdio_enable_4bit_bus(host->card); |
Ohad Ben-Cohen | 080bc97 | 2010-11-28 07:21:29 +0200 | [diff] [blame] | 963 | } |
| 964 | |
Fu Zhonghui | dea67c4 | 2014-08-18 10:48:14 +0800 | [diff] [blame] | 965 | if (!err && host->sdio_irqs) { |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 966 | if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) |
Fu Zhonghui | dea67c4 | 2014-08-18 10:48:14 +0800 | [diff] [blame] | 967 | wake_up_process(host->sdio_irq_thread); |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 968 | else if (host->caps & MMC_CAP_SDIO_IRQ) |
Fu Zhonghui | dea67c4 | 2014-08-18 10:48:14 +0800 | [diff] [blame] | 969 | host->ops->enable_sdio_irq(host, 1); |
Fu Zhonghui | dea67c4 | 2014-08-18 10:48:14 +0800 | [diff] [blame] | 970 | } |
| 971 | |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 972 | mmc_release_host(host); |
| 973 | |
Ulf Hansson | 7459026 | 2013-06-10 17:03:38 +0200 | [diff] [blame] | 974 | host->pm_flags &= ~MMC_PM_KEEP_POWER; |
Nicolas Pitre | 95cdfb7 | 2009-09-22 16:45:29 -0700 | [diff] [blame] | 975 | return err; |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 976 | } |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 977 | |
Ohad Ben-Cohen | d3fe37b | 2010-10-02 13:54:07 +0200 | [diff] [blame] | 978 | static int mmc_sdio_power_restore(struct mmc_host *host) |
| 979 | { |
| 980 | int ret; |
| 981 | |
Ohad Ben-Cohen | d3fe37b | 2010-10-02 13:54:07 +0200 | [diff] [blame] | 982 | mmc_claim_host(host); |
Daniel Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 983 | |
| 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 Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 999 | */ |
Ulf Hansson | e774747 | 2012-03-01 13:18:05 +0100 | [diff] [blame] | 1000 | |
Daniel Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 1001 | sdio_reset(host); |
| 1002 | mmc_go_idle(host); |
NeilBrown | 59b6c9e | 2014-11-12 14:55:19 +1100 | [diff] [blame] | 1003 | mmc_send_if_cond(host, host->card->ocr); |
Daniel Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 1004 | |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1005 | ret = mmc_send_io_op_cond(host, 0, NULL); |
Daniel Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 1006 | if (ret) |
| 1007 | goto out; |
| 1008 | |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1009 | ret = mmc_sdio_init_card(host, host->card->ocr, host->card, |
Ohad Ben-Cohen | a5e9425 | 2011-04-05 17:43:20 +0300 | [diff] [blame] | 1010 | mmc_card_keep_power(host)); |
Ohad Ben-Cohen | d3fe37b | 2010-10-02 13:54:07 +0200 | [diff] [blame] | 1011 | if (!ret && host->sdio_irqs) |
| 1012 | mmc_signal_sdio_irq(host); |
Daniel Drake | c6e633a | 2011-06-25 19:20:11 +0100 | [diff] [blame] | 1013 | |
| 1014 | out: |
Ohad Ben-Cohen | d3fe37b | 2010-10-02 13:54:07 +0200 | [diff] [blame] | 1015 | mmc_release_host(host); |
| 1016 | |
| 1017 | return ret; |
| 1018 | } |
| 1019 | |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1020 | static int mmc_sdio_runtime_suspend(struct mmc_host *host) |
| 1021 | { |
| 1022 | /* No references to the card, cut the power to it. */ |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 1023 | mmc_claim_host(host); |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1024 | mmc_power_off(host); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 1025 | mmc_release_host(host); |
| 1026 | |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | static int mmc_sdio_runtime_resume(struct mmc_host *host) |
| 1031 | { |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 1032 | int ret; |
| 1033 | |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1034 | /* Restore power and re-initialize. */ |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 1035 | mmc_claim_host(host); |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1036 | mmc_power_up(host, host->card->ocr); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 1037 | ret = mmc_sdio_power_restore(host); |
| 1038 | mmc_release_host(host); |
| 1039 | |
| 1040 | return ret; |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1041 | } |
| 1042 | |
Andreas Fenkart | 1fb654f | 2015-04-23 13:15:42 +0200 | [diff] [blame] | 1043 | static 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 Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1049 | static const struct mmc_bus_ops mmc_sdio_ops = { |
| 1050 | .remove = mmc_sdio_remove, |
| 1051 | .detect = mmc_sdio_detect, |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 1052 | .pre_suspend = mmc_sdio_pre_suspend, |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 1053 | .suspend = mmc_sdio_suspend, |
| 1054 | .resume = mmc_sdio_resume, |
Ulf Hansson | 12d01d0 | 2013-05-02 14:02:37 +0200 | [diff] [blame] | 1055 | .runtime_suspend = mmc_sdio_runtime_suspend, |
| 1056 | .runtime_resume = mmc_sdio_runtime_resume, |
Ohad Ben-Cohen | d3fe37b | 2010-10-02 13:54:07 +0200 | [diff] [blame] | 1057 | .power_restore = mmc_sdio_power_restore, |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 1058 | .alive = mmc_sdio_alive, |
Andreas Fenkart | 1fb654f | 2015-04-23 13:15:42 +0200 | [diff] [blame] | 1059 | .reset = mmc_sdio_reset, |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1060 | }; |
| 1061 | |
| 1062 | |
| 1063 | /* |
| 1064 | * Starting point for SDIO card init. |
| 1065 | */ |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1066 | int mmc_attach_sdio(struct mmc_host *host) |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1067 | { |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1068 | int err, i, funcs; |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1069 | u32 ocr, rocr; |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1070 | struct mmc_card *card; |
| 1071 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1072 | WARN_ON(!host->claimed); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1073 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1074 | err = mmc_send_io_op_cond(host, 0, &ocr); |
| 1075 | if (err) |
| 1076 | return err; |
| 1077 | |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1078 | mmc_attach_bus(host, &mmc_sdio_ops); |
Takashi Iwai | 8f230f4 | 2010-12-08 10:04:30 +0100 | [diff] [blame] | 1079 | if (host->ocr_avail_sdio) |
| 1080 | host->ocr_avail = host->ocr_avail_sdio; |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1081 | |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1082 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1083 | rocr = mmc_select_voltage(host, ocr); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1084 | |
| 1085 | /* |
| 1086 | * Can we support the voltage(s) of the card(s)? |
| 1087 | */ |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1088 | if (!rocr) { |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1089 | err = -EINVAL; |
| 1090 | goto err; |
| 1091 | } |
| 1092 | |
| 1093 | /* |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 1094 | * Detect and init the card. |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1095 | */ |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 1096 | err = mmc_sdio_init_card(host, rocr, NULL, 0); |
Ulf Hansson | ec2ed70 | 2013-09-12 16:38:56 +0200 | [diff] [blame] | 1097 | if (err) |
| 1098 | goto err; |
| 1099 | |
Nicolas Pitre | 17d33e1 | 2009-09-22 16:45:28 -0700 | [diff] [blame] | 1100 | card = host->card; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 1101 | |
| 1102 | /* |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 1103 | * Enable runtime PM only if supported by host+card+board |
Ohad Ben-Cohen | 81968561 | 2010-10-02 13:54:10 +0200 | [diff] [blame] | 1104 | */ |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 1105 | 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-Cohen | 81968561 | 2010-10-02 13:54:10 +0200 | [diff] [blame] | 1112 | |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 1113 | /* |
| 1114 | * Enable runtime PM for this card |
| 1115 | */ |
| 1116 | pm_runtime_enable(&card->dev); |
| 1117 | } |
Ohad Ben-Cohen | 81968561 | 2010-10-02 13:54:10 +0200 | [diff] [blame] | 1118 | |
| 1119 | /* |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1120 | * The number of functions on the card is encoded inside |
| 1121 | * the ocr. |
| 1122 | */ |
Matt Fleming | e881279 | 2009-12-17 15:27:18 -0800 | [diff] [blame] | 1123 | funcs = (ocr & 0x70000000) >> 28; |
| 1124 | card->sdio_funcs = 0; |
Pierre Ossman | 4ff6471 | 2007-07-30 18:23:53 +0200 | [diff] [blame] | 1125 | |
| 1126 | /* |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1127 | * Initialize (but don't add) all present functions. |
| 1128 | */ |
Matt Fleming | e881279 | 2009-12-17 15:27:18 -0800 | [diff] [blame] | 1129 | for (i = 0; i < funcs; i++, card->sdio_funcs++) { |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1130 | err = sdio_init_func(host->card, i + 1); |
| 1131 | if (err) |
| 1132 | goto remove; |
Ohad Ben-Cohen | 40bba0c | 2010-10-02 13:54:11 +0200 | [diff] [blame] | 1133 | |
| 1134 | /* |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 1135 | * Enable Runtime PM for this func (if supported) |
Ohad Ben-Cohen | 40bba0c | 2010-10-02 13:54:11 +0200 | [diff] [blame] | 1136 | */ |
Ohad Ben-Cohen | ed919b0 | 2010-11-19 09:29:09 +0200 | [diff] [blame] | 1137 | if (host->caps & MMC_CAP_POWER_OFF_CARD) |
| 1138 | pm_runtime_enable(&card->sdio_func[i]->dev); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1139 | } |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1140 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1141 | /* |
| 1142 | * First add the card to the driver model... |
| 1143 | */ |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1144 | mmc_release_host(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1145 | err = mmc_add_card(host->card); |
| 1146 | if (err) |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1147 | 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 Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1157 | |
Dmitry Shmidt | 3449791 | 2011-03-03 17:40:10 -0500 | [diff] [blame] | 1158 | mmc_claim_host(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1159 | return 0; |
| 1160 | |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1161 | |
| 1162 | remove_added: |
| 1163 | /* Remove without lock if the device has been added. */ |
| 1164 | mmc_sdio_remove(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1165 | mmc_claim_host(host); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1166 | remove: |
| 1167 | /* And with lock if it hasn't been added. */ |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1168 | mmc_release_host(host); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 1169 | if (host->card) |
| 1170 | mmc_sdio_remove(host); |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 1171 | mmc_claim_host(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1172 | err: |
| 1173 | mmc_detach_bus(host); |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1174 | |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 1175 | pr_err("%s: error %d whilst initialising SDIO card\n", |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 1176 | mmc_hostname(host), err); |
| 1177 | |
| 1178 | return err; |
| 1179 | } |
| 1180 | |