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         size_t          priv_size;
  77         int (*probe_slot)(struct platform_device *, const char *, const char *);
  78         int (*remove_slot)(struct platform_device *);
  79 };
  80
  81 struct sdhci_acpi_host {
  82         struct sdhci_host               *host;
  83         const struct sdhci_acpi_slot    *slot;
  84         struct platform_device          *pdev;
  85         bool                            use_runtime_pm;
  86         unsigned long                   private[0] ____cacheline_aligned;
  87 };
  88
  89 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
  90 {
  91         return (void *)c->private;
  92 }
  93
  94 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  95 {
  96         return c->slot && (c->slot->flags & flag);
  97 }
  98
  99 enum {
 100         INTEL_DSM_FNS           =  0,
 101         INTEL_DSM_V18_SWITCH    =  3,
 102         INTEL_DSM_V33_SWITCH    =  4,
 103 };
 104
 105 struct intel_host {
 106         u32     dsm_fns;
 107 };
 108
 109 static const guid_t intel_dsm_guid =
 110         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
 111                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 112
 113 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 114                        unsigned int fn, u32 *result)
 115 {
 116         union acpi_object *obj;
 117         int err = 0;
 118
 119         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
 120         if (!obj)
 121                 return -EOPNOTSUPP;
 122
 123         if (obj->type == ACPI_TYPE_INTEGER) {
 124                 *result = obj->integer.value;
 125         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
 126                 size_t len = min_t(size_t, obj->buffer.length, 4);
 127
 128                 *result = 0;
 129                 memcpy(result, obj->buffer.pointer, len);
 130         } else {
 131                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
 132                         __func__, fn, obj->type, obj->buffer.length);
 133                 err = -EINVAL;
 134         }
 135
 136         ACPI_FREE(obj);
 137
 138         return err;
 139 }
 140
 141 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
 142                      unsigned int fn, u32 *result)
 143 {
 144         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
 145                 return -EOPNOTSUPP;
 146
 147         return __intel_dsm(intel_host, dev, fn, result);
 148 }
 149
 150 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
 151                            struct mmc_host *mmc)
 152 {
 153         int err;
 154
 155         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
 156         if (err) {
 157                 pr_debug("%s: DSM not supported, error %d\n",
 158                          mmc_hostname(mmc), err);
 159                 return;
 160         }
 161
 162         pr_debug("%s: DSM function mask %#x\n",
 163                  mmc_hostname(mmc), intel_host->dsm_fns);
 164 }
 165
 166 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
 167                                              struct mmc_ios *ios)
 168 {
 169         struct device *dev = mmc_dev(mmc);
 170         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 171         struct intel_host *intel_host = sdhci_acpi_priv(c);
 172         unsigned int fn;
 173         u32 result = 0;
 174         int err;
 175
 176         err = sdhci_start_signal_voltage_switch(mmc, ios);
 177         if (err)
 178                 return err;
 179
 180         switch (ios->signal_voltage) {
 181         case MMC_SIGNAL_VOLTAGE_330:
 182                 fn = INTEL_DSM_V33_SWITCH;
 183                 break;
 184         case MMC_SIGNAL_VOLTAGE_180:
 185                 fn = INTEL_DSM_V18_SWITCH;
 186                 break;
 187         default:
 188                 return 0;
 189         }
 190
 191         err = intel_dsm(intel_host, dev, fn, &result);
 192         pr_debug("%s: %s DSM fn %u error %d result %u\n",
 193                  mmc_hostname(mmc), __func__, fn, err, result);
 194
 195         return 0;
 196 }
 197
 198 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
 199 {
 200         u8 reg;
 201
 202         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
 203         reg |= 0x10;
 204         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 205         /* For eMMC, minimum is 1us but give it 9us for good measure */
 206         udelay(9);
 207         reg &= ~0x10;
 208         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 209         /* For eMMC, minimum is 200us but give it 300us for good measure */
 210         usleep_range(300, 1000);
 211 }
 212
 213 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
 214         .set_clock = sdhci_set_clock,
 215         .set_bus_width = sdhci_set_bus_width,
 216         .reset = sdhci_reset,
 217         .set_uhs_signaling = sdhci_set_uhs_signaling,
 218 };
 219
 220 static const struct sdhci_ops sdhci_acpi_ops_int = {
 221         .set_clock = sdhci_set_clock,
 222         .set_bus_width = sdhci_set_bus_width,
 223         .reset = sdhci_reset,
 224         .set_uhs_signaling = sdhci_set_uhs_signaling,
 225         .hw_reset   = sdhci_acpi_int_hw_reset,
 226 };
 227
 228 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 229         .ops = &sdhci_acpi_ops_int,
 230 };
 231
 232 #ifdef CONFIG_X86
 233
 234 static bool sdhci_acpi_byt(void)
 235 {
 236         static const struct x86_cpu_id byt[] = {
 237                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
 238                 {}
 239         };
 240
 241         return x86_match_cpu(byt);
 242 }
 243
 244 static bool sdhci_acpi_cht(void)
 245 {
 246         static const struct x86_cpu_id cht[] = {
 247                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
 248                 {}
 249         };
 250
 251         return x86_match_cpu(cht);
 252 }
 253
 254 #define BYT_IOSF_SCCEP                  0x63
 255 #define BYT_IOSF_OCP_NETCTRL0           0x1078
 256 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
 257
 258 static void sdhci_acpi_byt_setting(struct device *dev)
 259 {
 260         u32 val = 0;
 261
 262         if (!sdhci_acpi_byt())
 263                 return;
 264
 265         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
 266                           &val)) {
 267                 dev_err(dev, "%s read error\n", __func__);
 268                 return;
 269         }
 270
 271         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
 272                 return;
 273
 274         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
 275
 276         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
 277                            val)) {
 278                 dev_err(dev, "%s write error\n", __func__);
 279                 return;
 280         }
 281
 282         dev_dbg(dev, "%s completed\n", __func__);
 283 }
 284
 285 static bool sdhci_acpi_byt_defer(struct device *dev)
 286 {
 287         if (!sdhci_acpi_byt())
 288                 return false;
 289
 290         if (!iosf_mbi_available())
 291                 return true;
 292
 293         sdhci_acpi_byt_setting(dev);
 294
 295         return false;
 296 }
 297
 298 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
 299                                     unsigned int slot, unsigned int parent_slot)
 300 {
 301         struct pci_dev *dev, *parent, *from = NULL;
 302
 303         while (1) {
 304                 dev = pci_get_device(vendor, device, from);
 305                 pci_dev_put(from);
 306                 if (!dev)
 307                         break;
 308                 parent = pci_upstream_bridge(dev);
 309                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
 310                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
 311                     !pci_upstream_bridge(parent)) {
 312                         pci_dev_put(dev);
 313                         return true;
 314                 }
 315                 from = dev;
 316         }
 317
 318         return false;
 319 }
 320
 321 /*
 322  * GPDwin uses PCI wifi which conflicts with SDIO's use of
 323  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
 324  * problematic, but since SDIO is only used for wifi, the presence of the PCI
 325  * wifi card in the expected slot with an ACPI companion node, is used to
 326  * indicate that acpi_device_fix_up_power() should be avoided.
 327  */
 328 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 329                                                    const char *uid)
 330 {
 331         return sdhci_acpi_cht() &&
 332                !strcmp(hid, "80860F14") &&
 333                !strcmp(uid, "2") &&
 334                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 335 }
 336
 337 #else
 338
 339 static inline void sdhci_acpi_byt_setting(struct device *dev)
 340 {
 341 }
 342
 343 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 344 {
 345         return false;
 346 }
 347
 348 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 349                                                    const char *uid)
 350 {
 351         return false;
 352 }
 353
 354 #endif
 355
 356 static int bxt_get_cd(struct mmc_host *mmc)
 357 {
 358         int gpio_cd = mmc_gpio_get_cd(mmc);
 359         struct sdhci_host *host = mmc_priv(mmc);
 360         unsigned long flags;
 361         int ret = 0;
 362
 363         if (!gpio_cd)
 364                 return 0;
 365
 366         spin_lock_irqsave(&host->lock, flags);
 367
 368         if (host->flags & SDHCI_DEVICE_DEAD)
 369                 goto out;
 370
 371         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 372 out:
 373         spin_unlock_irqrestore(&host->lock, flags);
 374
 375         return ret;
 376 }
 377
 378 static int intel_probe_slot(struct platform_device *pdev, const char *hid,
 379                             const char *uid)
 380 {
 381         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 382         struct intel_host *intel_host = sdhci_acpi_priv(c);
 383         struct sdhci_host *host = c->host;
 384
 385         if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
 386             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 387             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 388                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 389
 390         if (hid && !strcmp(hid, "80865ACA"))
 391                 host->mmc_host_ops.get_cd = bxt_get_cd;
 392
 393         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
 394
 395         host->mmc_host_ops.start_signal_voltage_switch =
 396                                         intel_start_signal_voltage_switch;
 397
 398         return 0;
 399 }
 400
 401 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 402         .chip    = &sdhci_acpi_chip_int,
 403         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 404                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 405                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 406         .flags   = SDHCI_ACPI_RUNTIME_PM,
 407         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 408         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 409                    SDHCI_QUIRK2_STOP_WITH_TC |
 410                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 411         .probe_slot     = intel_probe_slot,
 412         .priv_size      = sizeof(struct intel_host),
 413 };
 414
 415 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 416         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 417                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 418         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 419         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 420                    MMC_CAP_WAIT_WHILE_BUSY,
 421         .flags   = SDHCI_ACPI_RUNTIME_PM,
 422         .pm_caps = MMC_PM_KEEP_POWER,
 423         .probe_slot     = intel_probe_slot,
 424         .priv_size      = sizeof(struct intel_host),
 425 };
 426
 427 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 428         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 429                    SDHCI_ACPI_RUNTIME_PM,
 430         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 431         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 432                    SDHCI_QUIRK2_STOP_WITH_TC,
 433         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 434         .probe_slot     = intel_probe_slot,
 435         .priv_size      = sizeof(struct intel_host),
 436 };
 437
 438 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 439         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 440         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 441         .caps    = MMC_CAP_NONREMOVABLE,
 442 };
 443
 444 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 445         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 446         .caps    = MMC_CAP_NONREMOVABLE,
 447 };
 448
 449 struct sdhci_acpi_uid_slot {
 450         const char *hid;
 451         const char *uid;
 452         const struct sdhci_acpi_slot *slot;
 453 };
 454
 455 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 456         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 457         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 458         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 459         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 460         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 461         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 462         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 463         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 464         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 465         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 466         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 467         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 468         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 469         { "PNP0D40"  },
 470         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 471         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 472         { },
 473 };
 474
 475 static const struct acpi_device_id sdhci_acpi_ids[] = {
 476         { "80865ACA" },
 477         { "80865ACC" },
 478         { "80865AD0" },
 479         { "80860F14" },
 480         { "80860F16" },
 481         { "INT33BB"  },
 482         { "INT33C6"  },
 483         { "INT3436"  },
 484         { "INT344D"  },
 485         { "PNP0D40"  },
 486         { "QCOM8051" },
 487         { "QCOM8052" },
 488         { },
 489 };
 490 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 491
 492 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
 493                                                          const char *uid)
 494 {
 495         const struct sdhci_acpi_uid_slot *u;
 496
 497         for (u = sdhci_acpi_uids; u->hid; u++) {
 498                 if (strcmp(u->hid, hid))
 499                         continue;
 500                 if (!u->uid)
 501                         return u->slot;
 502                 if (uid && !strcmp(u->uid, uid))
 503                         return u->slot;
 504         }
 505         return NULL;
 506 }
 507
 508 static int sdhci_acpi_probe(struct platform_device *pdev)
 509 {
 510         struct device *dev = &pdev->dev;
 511         const struct sdhci_acpi_slot *slot;
 512         struct acpi_device *device, *child;
 513         struct sdhci_acpi_host *c;
 514         struct sdhci_host *host;
 515         struct resource *iomem;
 516         resource_size_t len;
 517         size_t priv_size;
 518         const char *hid;
 519         const char *uid;
 520         int err;
 521
 522         device = ACPI_COMPANION(dev);
 523         if (!device)
 524                 return -ENODEV;
 525
 526         hid = acpi_device_hid(device);
 527         uid = acpi_device_uid(device);
 528
 529         slot = sdhci_acpi_get_slot(hid, uid);
 530
 531         /* Power on the SDHCI controller and its children */
 532         acpi_device_fix_up_power(device);
 533         if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
 534                 list_for_each_entry(child, &device->children, node)
 535                         if (child->status.present && child->status.enabled)
 536                                 acpi_device_fix_up_power(child);
 537         }
 538
 539         if (sdhci_acpi_byt_defer(dev))
 540                 return -EPROBE_DEFER;
 541
 542         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 543         if (!iomem)
 544                 return -ENOMEM;
 545
 546         len = resource_size(iomem);
 547         if (len < 0x100)
 548                 dev_err(dev, "Invalid iomem size!\n");
 549
 550         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 551                 return -ENOMEM;
 552
 553         priv_size = slot ? slot->priv_size : 0;
 554         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
 555         if (IS_ERR(host))
 556                 return PTR_ERR(host);
 557
 558         c = sdhci_priv(host);
 559         c->host = host;
 560         c->slot = slot;
 561         c->pdev = pdev;
 562         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 563
 564         platform_set_drvdata(pdev, c);
 565
 566         host->hw_name   = "ACPI";
 567         host->ops       = &sdhci_acpi_ops_dflt;
 568         host->irq       = platform_get_irq(pdev, 0);
 569
 570         host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
 571                                             resource_size(iomem));
 572         if (host->ioaddr == NULL) {
 573                 err = -ENOMEM;
 574                 goto err_free;
 575         }
 576
 577         if (c->slot) {
 578                 if (c->slot->probe_slot) {
 579                         err = c->slot->probe_slot(pdev, hid, uid);
 580                         if (err)
 581                                 goto err_free;
 582                 }
 583                 if (c->slot->chip) {
 584                         host->ops            = c->slot->chip->ops;
 585                         host->quirks        |= c->slot->chip->quirks;
 586                         host->quirks2       |= c->slot->chip->quirks2;
 587                         host->mmc->caps     |= c->slot->chip->caps;
 588                         host->mmc->caps2    |= c->slot->chip->caps2;
 589                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 590                 }
 591                 host->quirks        |= c->slot->quirks;
 592                 host->quirks2       |= c->slot->quirks2;
 593                 host->mmc->caps     |= c->slot->caps;
 594                 host->mmc->caps2    |= c->slot->caps2;
 595                 host->mmc->pm_caps  |= c->slot->pm_caps;
 596         }
 597
 598         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 599
 600         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 601                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 602
 603                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
 604                 if (err) {
 605                         if (err == -EPROBE_DEFER)
 606                                 goto err_free;
 607                         dev_warn(dev, "failed to setup card detect gpio\n");
 608                         c->use_runtime_pm = false;
 609                 }
 610         }
 611
 612         err = sdhci_add_host(host);
 613         if (err)
 614                 goto err_free;
 615
 616         if (c->use_runtime_pm) {
 617                 pm_runtime_set_active(dev);
 618                 pm_suspend_ignore_children(dev, 1);
 619                 pm_runtime_set_autosuspend_delay(dev, 50);
 620                 pm_runtime_use_autosuspend(dev);
 621                 pm_runtime_enable(dev);
 622         }
 623
 624         device_enable_async_suspend(dev);
 625
 626         return 0;
 627
 628 err_free:
 629         sdhci_free_host(c->host);
 630         return err;
 631 }
 632
 633 static int sdhci_acpi_remove(struct platform_device *pdev)
 634 {
 635         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 636         struct device *dev = &pdev->dev;
 637         int dead;
 638
 639         if (c->use_runtime_pm) {
 640                 pm_runtime_get_sync(dev);
 641                 pm_runtime_disable(dev);
 642                 pm_runtime_put_noidle(dev);
 643         }
 644
 645         if (c->slot && c->slot->remove_slot)
 646                 c->slot->remove_slot(pdev);
 647
 648         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 649         sdhci_remove_host(c->host, dead);
 650         sdhci_free_host(c->host);
 651
 652         return 0;
 653 }
 654
 655 #ifdef CONFIG_PM_SLEEP
 656
 657 static int sdhci_acpi_suspend(struct device *dev)
 658 {
 659         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 660         struct sdhci_host *host = c->host;
 661
 662         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 663                 mmc_retune_needed(host->mmc);
 664
 665         return sdhci_suspend_host(host);
 666 }
 667
 668 static int sdhci_acpi_resume(struct device *dev)
 669 {
 670         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 671
 672         sdhci_acpi_byt_setting(&c->pdev->dev);
 673
 674         return sdhci_resume_host(c->host);
 675 }
 676
 677 #endif
 678
 679 #ifdef CONFIG_PM
 680
 681 static int sdhci_acpi_runtime_suspend(struct device *dev)
 682 {
 683         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 684         struct sdhci_host *host = c->host;
 685
 686         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 687                 mmc_retune_needed(host->mmc);
 688
 689         return sdhci_runtime_suspend_host(host);
 690 }
 691
 692 static int sdhci_acpi_runtime_resume(struct device *dev)
 693 {
 694         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 695
 696         sdhci_acpi_byt_setting(&c->pdev->dev);
 697
 698         return sdhci_runtime_resume_host(c->host);
 699 }
 700
 701 #endif
 702
 703 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 704         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 705         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 706                         sdhci_acpi_runtime_resume, NULL)
 707 };
 708
 709 static struct platform_driver sdhci_acpi_driver = {
 710         .driver = {
 711                 .name                   = "sdhci-acpi",
 712                 .acpi_match_table       = sdhci_acpi_ids,
 713                 .pm                     = &sdhci_acpi_pm_ops,
 714         },
 715         .probe  = sdhci_acpi_probe,
 716         .remove = sdhci_acpi_remove,
 717 };
 718
 719 module_platform_driver(sdhci_acpi_driver);
 720
 721 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 722 MODULE_AUTHOR("Adrian Hunter");
 723 MODULE_LICENSE("GPL v2");