drivers/mmc/host/sdhci-acpi.c

   1 /*
   2  * Secure Digital Host Controller Interface ACPI driver.
   3  *
   4  * Copyright (c) 2012, Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  */
  20
  21 #include <linux/init.h>
  22 #include <linux/export.h>
  23 #include <linux/module.h>
  24 #include <linux/device.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/ioport.h>
  27 #include <linux/io.h>
  28 #include <linux/dma-mapping.h>
  29 #include <linux/compiler.h>
  30 #include <linux/stddef.h>
  31 #include <linux/bitops.h>
  32 #include <linux/types.h>
  33 #include <linux/err.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/acpi.h>
  36 #include <linux/pm.h>
  37 #include <linux/pm_runtime.h>
  38 #include <linux/delay.h>
  39
  40 #include <linux/mmc/host.h>
  41 #include <linux/mmc/pm.h>
  42 #include <linux/mmc/slot-gpio.h>
  43
  44 #ifdef CONFIG_X86
  45 #include <asm/cpu_device_id.h>
  46 #include <asm/intel-family.h>
  47 #include <asm/iosf_mbi.h>
  48 #include <linux/pci.h>
  49 #endif
  50
  51 #include "sdhci.h"
  52
  53 enum {
  54         SDHCI_ACPI_SD_CD                = BIT(0),
  55         SDHCI_ACPI_RUNTIME_PM           = BIT(1),
  56         SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
  57 };
  58
  59 struct sdhci_acpi_chip {
  60         const struct    sdhci_ops *ops;
  61         unsigned int    quirks;
  62         unsigned int    quirks2;
  63         unsigned long   caps;
  64         unsigned int    caps2;
  65         mmc_pm_flag_t   pm_caps;
  66 };
  67
  68 struct sdhci_acpi_slot {
  69         const struct    sdhci_acpi_chip *chip;
  70         unsigned int    quirks;
  71         unsigned int    quirks2;
  72         unsigned long   caps;
  73         unsigned int    caps2;
  74         mmc_pm_flag_t   pm_caps;
  75         unsigned int    flags;
  76         int (*probe_slot)(struct platform_device *, const char *, const char *);
  77         int (*remove_slot)(struct platform_device *);
  78 };
  79
  80 struct sdhci_acpi_host {
  81         struct sdhci_host               *host;
  82         const struct sdhci_acpi_slot    *slot;
  83         struct platform_device          *pdev;
  84         bool                            use_runtime_pm;
  85 };
  86
  87 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  88 {
  89         return c->slot && (c->slot->flags & flag);
  90 }
  91
  92 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
  93 {
  94         u8 reg;
  95
  96         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
  97         reg |= 0x10;
  98         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
  99         /* For eMMC, minimum is 1us but give it 9us for good measure */
 100         udelay(9);
 101         reg &= ~0x10;
 102         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 103         /* For eMMC, minimum is 200us but give it 300us for good measure */
 104         usleep_range(300, 1000);
 105 }
 106
 107 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
 108         .set_clock = sdhci_set_clock,
 109         .set_bus_width = sdhci_set_bus_width,
 110         .reset = sdhci_reset,
 111         .set_uhs_signaling = sdhci_set_uhs_signaling,
 112 };
 113
 114 static const struct sdhci_ops sdhci_acpi_ops_int = {
 115         .set_clock = sdhci_set_clock,
 116         .set_bus_width = sdhci_set_bus_width,
 117         .reset = sdhci_reset,
 118         .set_uhs_signaling = sdhci_set_uhs_signaling,
 119         .hw_reset   = sdhci_acpi_int_hw_reset,
 120 };
 121
 122 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 123         .ops = &sdhci_acpi_ops_int,
 124 };
 125
 126 #ifdef CONFIG_X86
 127
 128 static bool sdhci_acpi_byt(void)
 129 {
 130         static const struct x86_cpu_id byt[] = {
 131                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
 132                 {}
 133         };
 134
 135         return x86_match_cpu(byt);
 136 }
 137
 138 static bool sdhci_acpi_cht(void)
 139 {
 140         static const struct x86_cpu_id cht[] = {
 141                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
 142                 {}
 143         };
 144
 145         return x86_match_cpu(cht);
 146 }
 147
 148 #define BYT_IOSF_SCCEP                  0x63
 149 #define BYT_IOSF_OCP_NETCTRL0           0x1078
 150 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
 151
 152 static void sdhci_acpi_byt_setting(struct device *dev)
 153 {
 154         u32 val = 0;
 155
 156         if (!sdhci_acpi_byt())
 157                 return;
 158
 159         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
 160                           &val)) {
 161                 dev_err(dev, "%s read error\n", __func__);
 162                 return;
 163         }
 164
 165         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
 166                 return;
 167
 168         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
 169
 170         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
 171                            val)) {
 172                 dev_err(dev, "%s write error\n", __func__);
 173                 return;
 174         }
 175
 176         dev_dbg(dev, "%s completed\n", __func__);
 177 }
 178
 179 static bool sdhci_acpi_byt_defer(struct device *dev)
 180 {
 181         if (!sdhci_acpi_byt())
 182                 return false;
 183
 184         if (!iosf_mbi_available())
 185                 return true;
 186
 187         sdhci_acpi_byt_setting(dev);
 188
 189         return false;
 190 }
 191
 192 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
 193                                     unsigned int slot, unsigned int parent_slot)
 194 {
 195         struct pci_dev *dev, *parent, *from = NULL;
 196
 197         while (1) {
 198                 dev = pci_get_device(vendor, device, from);
 199                 pci_dev_put(from);
 200                 if (!dev)
 201                         break;
 202                 parent = pci_upstream_bridge(dev);
 203                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
 204                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
 205                     !pci_upstream_bridge(parent)) {
 206                         pci_dev_put(dev);
 207                         return true;
 208                 }
 209                 from = dev;
 210         }
 211
 212         return false;
 213 }
 214
 215 /*
 216  * GPDwin uses PCI wifi which conflicts with SDIO's use of
 217  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
 218  * problematic, but since SDIO is only used for wifi, the presence of the PCI
 219  * wifi card in the expected slot with an ACPI companion node, is used to
 220  * indicate that acpi_device_fix_up_power() should be avoided.
 221  */
 222 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 223                                                    const char *uid)
 224 {
 225         return sdhci_acpi_cht() &&
 226                !strcmp(hid, "80860F14") &&
 227                !strcmp(uid, "2") &&
 228                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 229 }
 230
 231 #else
 232
 233 static inline void sdhci_acpi_byt_setting(struct device *dev)
 234 {
 235 }
 236
 237 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 238 {
 239         return false;
 240 }
 241
 242 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 243                                                    const char *uid)
 244 {
 245         return false;
 246 }
 247
 248 #endif
 249
 250 static int bxt_get_cd(struct mmc_host *mmc)
 251 {
 252         int gpio_cd = mmc_gpio_get_cd(mmc);
 253         struct sdhci_host *host = mmc_priv(mmc);
 254         unsigned long flags;
 255         int ret = 0;
 256
 257         if (!gpio_cd)
 258                 return 0;
 259
 260         spin_lock_irqsave(&host->lock, flags);
 261
 262         if (host->flags & SDHCI_DEVICE_DEAD)
 263                 goto out;
 264
 265         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 266 out:
 267         spin_unlock_irqrestore(&host->lock, flags);
 268
 269         return ret;
 270 }
 271
 272 static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
 273                                       const char *hid, const char *uid)
 274 {
 275         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 276         struct sdhci_host *host;
 277
 278         if (!c || !c->host)
 279                 return 0;
 280
 281         host = c->host;
 282
 283         /* Platform specific code during emmc probe slot goes here */
 284
 285         if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
 286             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 287             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 288                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 289
 290         return 0;
 291 }
 292
 293 static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
 294                                       const char *hid, const char *uid)
 295 {
 296         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 297
 298         if (!c || !c->host)
 299                 return 0;
 300
 301         /* Platform specific code during sdio probe slot goes here */
 302
 303         return 0;
 304 }
 305
 306 static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
 307                                     const char *hid, const char *uid)
 308 {
 309         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 310         struct sdhci_host *host;
 311
 312         if (!c || !c->host || !c->slot)
 313                 return 0;
 314
 315         host = c->host;
 316
 317         /* Platform specific code during sd probe slot goes here */
 318
 319         if (hid && !strcmp(hid, "80865ACA"))
 320                 host->mmc_host_ops.get_cd = bxt_get_cd;
 321
 322         return 0;
 323 }
 324
 325 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 326         .chip    = &sdhci_acpi_chip_int,
 327         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 328                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 329                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 330         .flags   = SDHCI_ACPI_RUNTIME_PM,
 331         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 332         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 333                    SDHCI_QUIRK2_STOP_WITH_TC |
 334                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 335         .probe_slot     = sdhci_acpi_emmc_probe_slot,
 336 };
 337
 338 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 339         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 340                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 341         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 342         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 343                    MMC_CAP_WAIT_WHILE_BUSY,
 344         .flags   = SDHCI_ACPI_RUNTIME_PM,
 345         .pm_caps = MMC_PM_KEEP_POWER,
 346         .probe_slot     = sdhci_acpi_sdio_probe_slot,
 347 };
 348
 349 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 350         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 351                    SDHCI_ACPI_RUNTIME_PM,
 352         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 353         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 354                    SDHCI_QUIRK2_STOP_WITH_TC,
 355         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 356         .probe_slot     = sdhci_acpi_sd_probe_slot,
 357 };
 358
 359 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 360         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 361         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 362         .caps    = MMC_CAP_NONREMOVABLE,
 363 };
 364
 365 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 366         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 367         .caps    = MMC_CAP_NONREMOVABLE,
 368 };
 369
 370 struct sdhci_acpi_uid_slot {
 371         const char *hid;
 372         const char *uid;
 373         const struct sdhci_acpi_slot *slot;
 374 };
 375
 376 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 377         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 378         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 379         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 380         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 381         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 382         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 383         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 384         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 385         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 386         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 387         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 388         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 389         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 390         { "PNP0D40"  },
 391         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 392         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 393         { },
 394 };
 395
 396 static const struct acpi_device_id sdhci_acpi_ids[] = {
 397         { "80865ACA" },
 398         { "80865ACC" },
 399         { "80865AD0" },
 400         { "80860F14" },
 401         { "80860F16" },
 402         { "INT33BB"  },
 403         { "INT33C6"  },
 404         { "INT3436"  },
 405         { "INT344D"  },
 406         { "PNP0D40"  },
 407         { "QCOM8051" },
 408         { "QCOM8052" },
 409         { },
 410 };
 411 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 412
 413 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
 414                                                          const char *uid)
 415 {
 416         const struct sdhci_acpi_uid_slot *u;
 417
 418         for (u = sdhci_acpi_uids; u->hid; u++) {
 419                 if (strcmp(u->hid, hid))
 420                         continue;
 421                 if (!u->uid)
 422                         return u->slot;
 423                 if (uid && !strcmp(u->uid, uid))
 424                         return u->slot;
 425         }
 426         return NULL;
 427 }
 428
 429 static int sdhci_acpi_probe(struct platform_device *pdev)
 430 {
 431         struct device *dev = &pdev->dev;
 432         struct acpi_device *device, *child;
 433         struct sdhci_acpi_host *c;
 434         struct sdhci_host *host;
 435         struct resource *iomem;
 436         resource_size_t len;
 437         const char *hid;
 438         const char *uid;
 439         int err;
 440
 441         device = ACPI_COMPANION(dev);
 442         if (!device)
 443                 return -ENODEV;
 444
 445         hid = acpi_device_hid(device);
 446         uid = device->pnp.unique_id;
 447
 448         /* Power on the SDHCI controller and its children */
 449         acpi_device_fix_up_power(device);
 450         if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
 451                 list_for_each_entry(child, &device->children, node)
 452                         if (child->status.present && child->status.enabled)
 453                                 acpi_device_fix_up_power(child);
 454         }
 455
 456         if (sdhci_acpi_byt_defer(dev))
 457                 return -EPROBE_DEFER;
 458
 459         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 460         if (!iomem)
 461                 return -ENOMEM;
 462
 463         len = resource_size(iomem);
 464         if (len < 0x100)
 465                 dev_err(dev, "Invalid iomem size!\n");
 466
 467         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 468                 return -ENOMEM;
 469
 470         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
 471         if (IS_ERR(host))
 472                 return PTR_ERR(host);
 473
 474         c = sdhci_priv(host);
 475         c->host = host;
 476         c->slot = sdhci_acpi_get_slot(hid, uid);
 477         c->pdev = pdev;
 478         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 479
 480         platform_set_drvdata(pdev, c);
 481
 482         host->hw_name   = "ACPI";
 483         host->ops       = &sdhci_acpi_ops_dflt;
 484         host->irq       = platform_get_irq(pdev, 0);
 485
 486         host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
 487                                             resource_size(iomem));
 488         if (host->ioaddr == NULL) {
 489                 err = -ENOMEM;
 490                 goto err_free;
 491         }
 492
 493         if (c->slot) {
 494                 if (c->slot->probe_slot) {
 495                         err = c->slot->probe_slot(pdev, hid, uid);
 496                         if (err)
 497                                 goto err_free;
 498                 }
 499                 if (c->slot->chip) {
 500                         host->ops            = c->slot->chip->ops;
 501                         host->quirks        |= c->slot->chip->quirks;
 502                         host->quirks2       |= c->slot->chip->quirks2;
 503                         host->mmc->caps     |= c->slot->chip->caps;
 504                         host->mmc->caps2    |= c->slot->chip->caps2;
 505                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 506                 }
 507                 host->quirks        |= c->slot->quirks;
 508                 host->quirks2       |= c->slot->quirks2;
 509                 host->mmc->caps     |= c->slot->caps;
 510                 host->mmc->caps2    |= c->slot->caps2;
 511                 host->mmc->pm_caps  |= c->slot->pm_caps;
 512         }
 513
 514         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 515
 516         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 517                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 518
 519                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
 520                 if (err) {
 521                         if (err == -EPROBE_DEFER)
 522                                 goto err_free;
 523                         dev_warn(dev, "failed to setup card detect gpio\n");
 524                         c->use_runtime_pm = false;
 525                 }
 526         }
 527
 528         err = sdhci_add_host(host);
 529         if (err)
 530                 goto err_free;
 531
 532         if (c->use_runtime_pm) {
 533                 pm_runtime_set_active(dev);
 534                 pm_suspend_ignore_children(dev, 1);
 535                 pm_runtime_set_autosuspend_delay(dev, 50);
 536                 pm_runtime_use_autosuspend(dev);
 537                 pm_runtime_enable(dev);
 538         }
 539
 540         device_enable_async_suspend(dev);
 541
 542         return 0;
 543
 544 err_free:
 545         sdhci_free_host(c->host);
 546         return err;
 547 }
 548
 549 static int sdhci_acpi_remove(struct platform_device *pdev)
 550 {
 551         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 552         struct device *dev = &pdev->dev;
 553         int dead;
 554
 555         if (c->use_runtime_pm) {
 556                 pm_runtime_get_sync(dev);
 557                 pm_runtime_disable(dev);
 558                 pm_runtime_put_noidle(dev);
 559         }
 560
 561         if (c->slot && c->slot->remove_slot)
 562                 c->slot->remove_slot(pdev);
 563
 564         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 565         sdhci_remove_host(c->host, dead);
 566         sdhci_free_host(c->host);
 567
 568         return 0;
 569 }
 570
 571 #ifdef CONFIG_PM_SLEEP
 572
 573 static int sdhci_acpi_suspend(struct device *dev)
 574 {
 575         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 576         struct sdhci_host *host = c->host;
 577
 578         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 579                 mmc_retune_needed(host->mmc);
 580
 581         return sdhci_suspend_host(host);
 582 }
 583
 584 static int sdhci_acpi_resume(struct device *dev)
 585 {
 586         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 587
 588         sdhci_acpi_byt_setting(&c->pdev->dev);
 589
 590         return sdhci_resume_host(c->host);
 591 }
 592
 593 #endif
 594
 595 #ifdef CONFIG_PM
 596
 597 static int sdhci_acpi_runtime_suspend(struct device *dev)
 598 {
 599         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 600         struct sdhci_host *host = c->host;
 601
 602         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 603                 mmc_retune_needed(host->mmc);
 604
 605         return sdhci_runtime_suspend_host(host);
 606 }
 607
 608 static int sdhci_acpi_runtime_resume(struct device *dev)
 609 {
 610         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 611
 612         sdhci_acpi_byt_setting(&c->pdev->dev);
 613
 614         return sdhci_runtime_resume_host(c->host);
 615 }
 616
 617 #endif
 618
 619 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 620         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 621         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 622                         sdhci_acpi_runtime_resume, NULL)
 623 };
 624
 625 static struct platform_driver sdhci_acpi_driver = {
 626         .driver = {
 627                 .name                   = "sdhci-acpi",
 628                 .acpi_match_table       = sdhci_acpi_ids,
 629                 .pm                     = &sdhci_acpi_pm_ops,
 630         },
 631         .probe  = sdhci_acpi_probe,
 632         .remove = sdhci_acpi_remove,
 633 };
 634
 635 module_platform_driver(sdhci_acpi_driver);
 636
 637 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 638 MODULE_AUTHOR("Adrian Hunter");
 639 MODULE_LICENSE("GPL v2");