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         struct sdhci_host *host;
 298
 299         if (!c || !c->host)
 300                 return 0;
 301
 302         host = c->host;
 303
 304         /* Platform specific code during sdio probe slot goes here */
 305
 306         return 0;
 307 }
 308
 309 static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
 310                                     const char *hid, const char *uid)
 311 {
 312         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 313         struct sdhci_host *host;
 314
 315         if (!c || !c->host || !c->slot)
 316                 return 0;
 317
 318         host = c->host;
 319
 320         /* Platform specific code during sd probe slot goes here */
 321
 322         if (hid && !strcmp(hid, "80865ACA"))
 323                 host->mmc_host_ops.get_cd = bxt_get_cd;
 324
 325         return 0;
 326 }
 327
 328 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 329         .chip    = &sdhci_acpi_chip_int,
 330         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 331                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 332                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 333         .flags   = SDHCI_ACPI_RUNTIME_PM,
 334         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 335         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 336                    SDHCI_QUIRK2_STOP_WITH_TC |
 337                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 338         .probe_slot     = sdhci_acpi_emmc_probe_slot,
 339 };
 340
 341 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 342         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 343                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 344         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 345         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 346                    MMC_CAP_WAIT_WHILE_BUSY,
 347         .flags   = SDHCI_ACPI_RUNTIME_PM,
 348         .pm_caps = MMC_PM_KEEP_POWER,
 349         .probe_slot     = sdhci_acpi_sdio_probe_slot,
 350 };
 351
 352 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 353         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 354                    SDHCI_ACPI_RUNTIME_PM,
 355         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 356         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 357                    SDHCI_QUIRK2_STOP_WITH_TC,
 358         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 359         .probe_slot     = sdhci_acpi_sd_probe_slot,
 360 };
 361
 362 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 363         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 364         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 365         .caps    = MMC_CAP_NONREMOVABLE,
 366 };
 367
 368 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 369         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 370         .caps    = MMC_CAP_NONREMOVABLE,
 371 };
 372
 373 struct sdhci_acpi_uid_slot {
 374         const char *hid;
 375         const char *uid;
 376         const struct sdhci_acpi_slot *slot;
 377 };
 378
 379 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 380         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 381         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 382         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 383         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 384         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 385         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 386         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 387         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 388         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 389         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 390         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 391         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 392         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 393         { "PNP0D40"  },
 394         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 395         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 396         { },
 397 };
 398
 399 static const struct acpi_device_id sdhci_acpi_ids[] = {
 400         { "80865ACA" },
 401         { "80865ACC" },
 402         { "80865AD0" },
 403         { "80860F14" },
 404         { "80860F16" },
 405         { "INT33BB"  },
 406         { "INT33C6"  },
 407         { "INT3436"  },
 408         { "INT344D"  },
 409         { "PNP0D40"  },
 410         { "QCOM8051" },
 411         { "QCOM8052" },
 412         { },
 413 };
 414 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 415
 416 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
 417                                                          const char *uid)
 418 {
 419         const struct sdhci_acpi_uid_slot *u;
 420
 421         for (u = sdhci_acpi_uids; u->hid; u++) {
 422                 if (strcmp(u->hid, hid))
 423                         continue;
 424                 if (!u->uid)
 425                         return u->slot;
 426                 if (uid && !strcmp(u->uid, uid))
 427                         return u->slot;
 428         }
 429         return NULL;
 430 }
 431
 432 static int sdhci_acpi_probe(struct platform_device *pdev)
 433 {
 434         struct device *dev = &pdev->dev;
 435         acpi_handle handle = ACPI_HANDLE(dev);
 436         struct acpi_device *device, *child;
 437         struct sdhci_acpi_host *c;
 438         struct sdhci_host *host;
 439         struct resource *iomem;
 440         resource_size_t len;
 441         const char *hid;
 442         const char *uid;
 443         int err;
 444
 445         if (acpi_bus_get_device(handle, &device))
 446                 return -ENODEV;
 447
 448         hid = acpi_device_hid(device);
 449         uid = device->pnp.unique_id;
 450
 451         /* Power on the SDHCI controller and its children */
 452         acpi_device_fix_up_power(device);
 453         if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
 454                 list_for_each_entry(child, &device->children, node)
 455                         if (child->status.present && child->status.enabled)
 456                                 acpi_device_fix_up_power(child);
 457         }
 458
 459         if (sdhci_acpi_byt_defer(dev))
 460                 return -EPROBE_DEFER;
 461
 462         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 463         if (!iomem)
 464                 return -ENOMEM;
 465
 466         len = resource_size(iomem);
 467         if (len < 0x100)
 468                 dev_err(dev, "Invalid iomem size!\n");
 469
 470         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 471                 return -ENOMEM;
 472
 473         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
 474         if (IS_ERR(host))
 475                 return PTR_ERR(host);
 476
 477         c = sdhci_priv(host);
 478         c->host = host;
 479         c->slot = sdhci_acpi_get_slot(hid, uid);
 480         c->pdev = pdev;
 481         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 482
 483         platform_set_drvdata(pdev, c);
 484
 485         host->hw_name   = "ACPI";
 486         host->ops       = &sdhci_acpi_ops_dflt;
 487         host->irq       = platform_get_irq(pdev, 0);
 488
 489         host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
 490                                             resource_size(iomem));
 491         if (host->ioaddr == NULL) {
 492                 err = -ENOMEM;
 493                 goto err_free;
 494         }
 495
 496         if (c->slot) {
 497                 if (c->slot->probe_slot) {
 498                         err = c->slot->probe_slot(pdev, hid, uid);
 499                         if (err)
 500                                 goto err_free;
 501                 }
 502                 if (c->slot->chip) {
 503                         host->ops            = c->slot->chip->ops;
 504                         host->quirks        |= c->slot->chip->quirks;
 505                         host->quirks2       |= c->slot->chip->quirks2;
 506                         host->mmc->caps     |= c->slot->chip->caps;
 507                         host->mmc->caps2    |= c->slot->chip->caps2;
 508                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 509                 }
 510                 host->quirks        |= c->slot->quirks;
 511                 host->quirks2       |= c->slot->quirks2;
 512                 host->mmc->caps     |= c->slot->caps;
 513                 host->mmc->caps2    |= c->slot->caps2;
 514                 host->mmc->pm_caps  |= c->slot->pm_caps;
 515         }
 516
 517         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 518
 519         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 520                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 521
 522                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
 523                 if (err) {
 524                         if (err == -EPROBE_DEFER)
 525                                 goto err_free;
 526                         dev_warn(dev, "failed to setup card detect gpio\n");
 527                         c->use_runtime_pm = false;
 528                 }
 529         }
 530
 531         err = sdhci_add_host(host);
 532         if (err)
 533                 goto err_free;
 534
 535         if (c->use_runtime_pm) {
 536                 pm_runtime_set_active(dev);
 537                 pm_suspend_ignore_children(dev, 1);
 538                 pm_runtime_set_autosuspend_delay(dev, 50);
 539                 pm_runtime_use_autosuspend(dev);
 540                 pm_runtime_enable(dev);
 541         }
 542
 543         device_enable_async_suspend(dev);
 544
 545         return 0;
 546
 547 err_free:
 548         sdhci_free_host(c->host);
 549         return err;
 550 }
 551
 552 static int sdhci_acpi_remove(struct platform_device *pdev)
 553 {
 554         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 555         struct device *dev = &pdev->dev;
 556         int dead;
 557
 558         if (c->use_runtime_pm) {
 559                 pm_runtime_get_sync(dev);
 560                 pm_runtime_disable(dev);
 561                 pm_runtime_put_noidle(dev);
 562         }
 563
 564         if (c->slot && c->slot->remove_slot)
 565                 c->slot->remove_slot(pdev);
 566
 567         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 568         sdhci_remove_host(c->host, dead);
 569         sdhci_free_host(c->host);
 570
 571         return 0;
 572 }
 573
 574 #ifdef CONFIG_PM_SLEEP
 575
 576 static int sdhci_acpi_suspend(struct device *dev)
 577 {
 578         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 579         struct sdhci_host *host = c->host;
 580
 581         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 582                 mmc_retune_needed(host->mmc);
 583
 584         return sdhci_suspend_host(host);
 585 }
 586
 587 static int sdhci_acpi_resume(struct device *dev)
 588 {
 589         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 590
 591         sdhci_acpi_byt_setting(&c->pdev->dev);
 592
 593         return sdhci_resume_host(c->host);
 594 }
 595
 596 #endif
 597
 598 #ifdef CONFIG_PM
 599
 600 static int sdhci_acpi_runtime_suspend(struct device *dev)
 601 {
 602         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 603         struct sdhci_host *host = c->host;
 604
 605         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 606                 mmc_retune_needed(host->mmc);
 607
 608         return sdhci_runtime_suspend_host(host);
 609 }
 610
 611 static int sdhci_acpi_runtime_resume(struct device *dev)
 612 {
 613         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 614
 615         sdhci_acpi_byt_setting(&c->pdev->dev);
 616
 617         return sdhci_runtime_resume_host(c->host);
 618 }
 619
 620 #endif
 621
 622 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 623         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 624         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 625                         sdhci_acpi_runtime_resume, NULL)
 626 };
 627
 628 static struct platform_driver sdhci_acpi_driver = {
 629         .driver = {
 630                 .name                   = "sdhci-acpi",
 631                 .acpi_match_table       = sdhci_acpi_ids,
 632                 .pm                     = &sdhci_acpi_pm_ops,
 633         },
 634         .probe  = sdhci_acpi_probe,
 635         .remove = sdhci_acpi_remove,
 636 };
 637
 638 module_platform_driver(sdhci_acpi_driver);
 639
 640 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 641 MODULE_AUTHOR("Adrian Hunter");
 642 MODULE_LICENSE("GPL v2");