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         int (*setup_host)(struct platform_device *pdev);
  80 };
  81
  82 struct sdhci_acpi_host {
  83         struct sdhci_host               *host;
  84         const struct sdhci_acpi_slot    *slot;
  85         struct platform_device          *pdev;
  86         bool                            use_runtime_pm;
  87         unsigned long                   private[0] ____cacheline_aligned;
  88 };
  89
  90 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
  91 {
  92         return (void *)c->private;
  93 }
  94
  95 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  96 {
  97         return c->slot && (c->slot->flags & flag);
  98 }
  99
 100 #define INTEL_DSM_HS_CAPS_SDR25         BIT(0)
 101 #define INTEL_DSM_HS_CAPS_DDR50         BIT(1)
 102 #define INTEL_DSM_HS_CAPS_SDR50         BIT(2)
 103 #define INTEL_DSM_HS_CAPS_SDR104        BIT(3)
 104
 105 enum {
 106         INTEL_DSM_FNS           =  0,
 107         INTEL_DSM_V18_SWITCH    =  3,
 108         INTEL_DSM_V33_SWITCH    =  4,
 109         INTEL_DSM_HS_CAPS       =  8,
 110 };
 111
 112 struct intel_host {
 113         u32     dsm_fns;
 114         u32     hs_caps;
 115 };
 116
 117 static const guid_t intel_dsm_guid =
 118         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
 119                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 120
 121 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 122                        unsigned int fn, u32 *result)
 123 {
 124         union acpi_object *obj;
 125         int err = 0;
 126
 127         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
 128         if (!obj)
 129                 return -EOPNOTSUPP;
 130
 131         if (obj->type == ACPI_TYPE_INTEGER) {
 132                 *result = obj->integer.value;
 133         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
 134                 size_t len = min_t(size_t, obj->buffer.length, 4);
 135
 136                 *result = 0;
 137                 memcpy(result, obj->buffer.pointer, len);
 138         } else {
 139                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
 140                         __func__, fn, obj->type, obj->buffer.length);
 141                 err = -EINVAL;
 142         }
 143
 144         ACPI_FREE(obj);
 145
 146         return err;
 147 }
 148
 149 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
 150                      unsigned int fn, u32 *result)
 151 {
 152         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
 153                 return -EOPNOTSUPP;
 154
 155         return __intel_dsm(intel_host, dev, fn, result);
 156 }
 157
 158 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
 159                            struct mmc_host *mmc)
 160 {
 161         int err;
 162
 163         intel_host->hs_caps = ~0;
 164
 165         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
 166         if (err) {
 167                 pr_debug("%s: DSM not supported, error %d\n",
 168                          mmc_hostname(mmc), err);
 169                 return;
 170         }
 171
 172         pr_debug("%s: DSM function mask %#x\n",
 173                  mmc_hostname(mmc), intel_host->dsm_fns);
 174
 175         intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
 176 }
 177
 178 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
 179                                              struct mmc_ios *ios)
 180 {
 181         struct device *dev = mmc_dev(mmc);
 182         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 183         struct intel_host *intel_host = sdhci_acpi_priv(c);
 184         unsigned int fn;
 185         u32 result = 0;
 186         int err;
 187
 188         err = sdhci_start_signal_voltage_switch(mmc, ios);
 189         if (err)
 190                 return err;
 191
 192         switch (ios->signal_voltage) {
 193         case MMC_SIGNAL_VOLTAGE_330:
 194                 fn = INTEL_DSM_V33_SWITCH;
 195                 break;
 196         case MMC_SIGNAL_VOLTAGE_180:
 197                 fn = INTEL_DSM_V18_SWITCH;
 198                 break;
 199         default:
 200                 return 0;
 201         }
 202
 203         err = intel_dsm(intel_host, dev, fn, &result);
 204         pr_debug("%s: %s DSM fn %u error %d result %u\n",
 205                  mmc_hostname(mmc), __func__, fn, err, result);
 206
 207         return 0;
 208 }
 209
 210 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
 211 {
 212         u8 reg;
 213
 214         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
 215         reg |= 0x10;
 216         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 217         /* For eMMC, minimum is 1us but give it 9us for good measure */
 218         udelay(9);
 219         reg &= ~0x10;
 220         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 221         /* For eMMC, minimum is 200us but give it 300us for good measure */
 222         usleep_range(300, 1000);
 223 }
 224
 225 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
 226         .set_clock = sdhci_set_clock,
 227         .set_bus_width = sdhci_set_bus_width,
 228         .reset = sdhci_reset,
 229         .set_uhs_signaling = sdhci_set_uhs_signaling,
 230 };
 231
 232 static const struct sdhci_ops sdhci_acpi_ops_int = {
 233         .set_clock = sdhci_set_clock,
 234         .set_bus_width = sdhci_set_bus_width,
 235         .reset = sdhci_reset,
 236         .set_uhs_signaling = sdhci_set_uhs_signaling,
 237         .hw_reset   = sdhci_acpi_int_hw_reset,
 238 };
 239
 240 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 241         .ops = &sdhci_acpi_ops_int,
 242 };
 243
 244 #ifdef CONFIG_X86
 245
 246 static bool sdhci_acpi_byt(void)
 247 {
 248         static const struct x86_cpu_id byt[] = {
 249                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
 250                 {}
 251         };
 252
 253         return x86_match_cpu(byt);
 254 }
 255
 256 static bool sdhci_acpi_cht(void)
 257 {
 258         static const struct x86_cpu_id cht[] = {
 259                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
 260                 {}
 261         };
 262
 263         return x86_match_cpu(cht);
 264 }
 265
 266 #define BYT_IOSF_SCCEP                  0x63
 267 #define BYT_IOSF_OCP_NETCTRL0           0x1078
 268 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
 269
 270 static void sdhci_acpi_byt_setting(struct device *dev)
 271 {
 272         u32 val = 0;
 273
 274         if (!sdhci_acpi_byt())
 275                 return;
 276
 277         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
 278                           &val)) {
 279                 dev_err(dev, "%s read error\n", __func__);
 280                 return;
 281         }
 282
 283         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
 284                 return;
 285
 286         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
 287
 288         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
 289                            val)) {
 290                 dev_err(dev, "%s write error\n", __func__);
 291                 return;
 292         }
 293
 294         dev_dbg(dev, "%s completed\n", __func__);
 295 }
 296
 297 static bool sdhci_acpi_byt_defer(struct device *dev)
 298 {
 299         if (!sdhci_acpi_byt())
 300                 return false;
 301
 302         if (!iosf_mbi_available())
 303                 return true;
 304
 305         sdhci_acpi_byt_setting(dev);
 306
 307         return false;
 308 }
 309
 310 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
 311                                     unsigned int slot, unsigned int parent_slot)
 312 {
 313         struct pci_dev *dev, *parent, *from = NULL;
 314
 315         while (1) {
 316                 dev = pci_get_device(vendor, device, from);
 317                 pci_dev_put(from);
 318                 if (!dev)
 319                         break;
 320                 parent = pci_upstream_bridge(dev);
 321                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
 322                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
 323                     !pci_upstream_bridge(parent)) {
 324                         pci_dev_put(dev);
 325                         return true;
 326                 }
 327                 from = dev;
 328         }
 329
 330         return false;
 331 }
 332
 333 /*
 334  * GPDwin uses PCI wifi which conflicts with SDIO's use of
 335  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
 336  * problematic, but since SDIO is only used for wifi, the presence of the PCI
 337  * wifi card in the expected slot with an ACPI companion node, is used to
 338  * indicate that acpi_device_fix_up_power() should be avoided.
 339  */
 340 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 341                                                    const char *uid)
 342 {
 343         return sdhci_acpi_cht() &&
 344                !strcmp(hid, "80860F14") &&
 345                !strcmp(uid, "2") &&
 346                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 347 }
 348
 349 #else
 350
 351 static inline void sdhci_acpi_byt_setting(struct device *dev)
 352 {
 353 }
 354
 355 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 356 {
 357         return false;
 358 }
 359
 360 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 361                                                    const char *uid)
 362 {
 363         return false;
 364 }
 365
 366 #endif
 367
 368 static int bxt_get_cd(struct mmc_host *mmc)
 369 {
 370         int gpio_cd = mmc_gpio_get_cd(mmc);
 371         struct sdhci_host *host = mmc_priv(mmc);
 372         unsigned long flags;
 373         int ret = 0;
 374
 375         if (!gpio_cd)
 376                 return 0;
 377
 378         spin_lock_irqsave(&host->lock, flags);
 379
 380         if (host->flags & SDHCI_DEVICE_DEAD)
 381                 goto out;
 382
 383         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 384 out:
 385         spin_unlock_irqrestore(&host->lock, flags);
 386
 387         return ret;
 388 }
 389
 390 static int intel_probe_slot(struct platform_device *pdev, const char *hid,
 391                             const char *uid)
 392 {
 393         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 394         struct intel_host *intel_host = sdhci_acpi_priv(c);
 395         struct sdhci_host *host = c->host;
 396
 397         if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
 398             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 399             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 400                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 401
 402         if (hid && !strcmp(hid, "80865ACA"))
 403                 host->mmc_host_ops.get_cd = bxt_get_cd;
 404
 405         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
 406
 407         host->mmc_host_ops.start_signal_voltage_switch =
 408                                         intel_start_signal_voltage_switch;
 409
 410         return 0;
 411 }
 412
 413 static int intel_setup_host(struct platform_device *pdev)
 414 {
 415         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 416         struct intel_host *intel_host = sdhci_acpi_priv(c);
 417
 418         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
 419                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
 420
 421         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
 422                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
 423
 424         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
 425                 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
 426
 427         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
 428                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
 429
 430         return 0;
 431 }
 432
 433 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 434         .chip    = &sdhci_acpi_chip_int,
 435         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 436                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 437                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 438         .flags   = SDHCI_ACPI_RUNTIME_PM,
 439         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 440         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 441                    SDHCI_QUIRK2_STOP_WITH_TC |
 442                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 443         .probe_slot     = intel_probe_slot,
 444         .setup_host     = intel_setup_host,
 445         .priv_size      = sizeof(struct intel_host),
 446 };
 447
 448 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 449         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 450                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 451         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 452         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 453                    MMC_CAP_WAIT_WHILE_BUSY,
 454         .flags   = SDHCI_ACPI_RUNTIME_PM,
 455         .pm_caps = MMC_PM_KEEP_POWER,
 456         .probe_slot     = intel_probe_slot,
 457         .setup_host     = intel_setup_host,
 458         .priv_size      = sizeof(struct intel_host),
 459 };
 460
 461 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 462         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 463                    SDHCI_ACPI_RUNTIME_PM,
 464         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 465         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 466                    SDHCI_QUIRK2_STOP_WITH_TC,
 467         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 468         .probe_slot     = intel_probe_slot,
 469         .setup_host     = intel_setup_host,
 470         .priv_size      = sizeof(struct intel_host),
 471 };
 472
 473 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 474         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 475         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 476         .caps    = MMC_CAP_NONREMOVABLE,
 477 };
 478
 479 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 480         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 481         .caps    = MMC_CAP_NONREMOVABLE,
 482 };
 483
 484 /* AMD sdhci reset dll register. */
 485 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
 486
 487 static int amd_select_drive_strength(struct mmc_card *card,
 488                                      unsigned int max_dtr, int host_drv,
 489                                      int card_drv, int *drv_type)
 490 {
 491         return MMC_SET_DRIVER_TYPE_A;
 492 }
 493
 494 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
 495 {
 496         /* AMD Platform requires dll setting */
 497         sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
 498         usleep_range(10, 20);
 499         sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
 500 }
 501
 502 /*
 503  * For AMD Platform it is required to disable the tuning
 504  * bit first controller to bring to HS Mode from HS200
 505  * mode, later enable to tune to HS400 mode.
 506  */
 507 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 508 {
 509         struct sdhci_host *host = mmc_priv(mmc);
 510         unsigned int old_timing = host->timing;
 511
 512         sdhci_set_ios(mmc, ios);
 513         if (old_timing == MMC_TIMING_MMC_HS200 &&
 514             ios->timing == MMC_TIMING_MMC_HS)
 515                 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
 516         if (old_timing != MMC_TIMING_MMC_HS400 &&
 517             ios->timing == MMC_TIMING_MMC_HS400) {
 518                 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
 519                 sdhci_acpi_amd_hs400_dll(host);
 520         }
 521 }
 522
 523 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 524         .set_clock      = sdhci_set_clock,
 525         .set_bus_width  = sdhci_set_bus_width,
 526         .reset          = sdhci_reset,
 527         .set_uhs_signaling = sdhci_set_uhs_signaling,
 528 };
 529
 530 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
 531         .ops = &sdhci_acpi_ops_amd,
 532 };
 533
 534 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
 535                                           const char *hid, const char *uid)
 536 {
 537         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 538         struct sdhci_host *host   = c->host;
 539
 540         sdhci_read_caps(host);
 541         if (host->caps1 & SDHCI_SUPPORT_DDR50)
 542                 host->mmc->caps = MMC_CAP_1_8V_DDR;
 543
 544         if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
 545             (host->mmc->caps & MMC_CAP_1_8V_DDR))
 546                 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
 547
 548         host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
 549         host->mmc_host_ops.set_ios = amd_set_ios;
 550         return 0;
 551 }
 552
 553 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
 554         .chip   = &sdhci_acpi_chip_amd,
 555         .caps   = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
 556         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
 557                         SDHCI_QUIRK_32BIT_ADMA_SIZE,
 558         .probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
 559 };
 560
 561 struct sdhci_acpi_uid_slot {
 562         const char *hid;
 563         const char *uid;
 564         const struct sdhci_acpi_slot *slot;
 565 };
 566
 567 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 568         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 569         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 570         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 571         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 572         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 573         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 574         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 575         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 576         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 577         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 578         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 579         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 580         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 581         { "PNP0D40"  },
 582         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 583         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 584         { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
 585         { },
 586 };
 587
 588 static const struct acpi_device_id sdhci_acpi_ids[] = {
 589         { "80865ACA" },
 590         { "80865ACC" },
 591         { "80865AD0" },
 592         { "80860F14" },
 593         { "80860F16" },
 594         { "INT33BB"  },
 595         { "INT33C6"  },
 596         { "INT3436"  },
 597         { "INT344D"  },
 598         { "PNP0D40"  },
 599         { "QCOM8051" },
 600         { "QCOM8052" },
 601         { "AMDI0040" },
 602         { },
 603 };
 604 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 605
 606 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
 607                                                          const char *uid)
 608 {
 609         const struct sdhci_acpi_uid_slot *u;
 610
 611         for (u = sdhci_acpi_uids; u->hid; u++) {
 612                 if (strcmp(u->hid, hid))
 613                         continue;
 614                 if (!u->uid)
 615                         return u->slot;
 616                 if (uid && !strcmp(u->uid, uid))
 617                         return u->slot;
 618         }
 619         return NULL;
 620 }
 621
 622 static int sdhci_acpi_probe(struct platform_device *pdev)
 623 {
 624         struct device *dev = &pdev->dev;
 625         const struct sdhci_acpi_slot *slot;
 626         struct acpi_device *device, *child;
 627         struct sdhci_acpi_host *c;
 628         struct sdhci_host *host;
 629         struct resource *iomem;
 630         resource_size_t len;
 631         size_t priv_size;
 632         const char *hid;
 633         const char *uid;
 634         int err;
 635
 636         device = ACPI_COMPANION(dev);
 637         if (!device)
 638                 return -ENODEV;
 639
 640         hid = acpi_device_hid(device);
 641         uid = acpi_device_uid(device);
 642
 643         slot = sdhci_acpi_get_slot(hid, uid);
 644
 645         /* Power on the SDHCI controller and its children */
 646         acpi_device_fix_up_power(device);
 647         if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
 648                 list_for_each_entry(child, &device->children, node)
 649                         if (child->status.present && child->status.enabled)
 650                                 acpi_device_fix_up_power(child);
 651         }
 652
 653         if (sdhci_acpi_byt_defer(dev))
 654                 return -EPROBE_DEFER;
 655
 656         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 657         if (!iomem)
 658                 return -ENOMEM;
 659
 660         len = resource_size(iomem);
 661         if (len < 0x100)
 662                 dev_err(dev, "Invalid iomem size!\n");
 663
 664         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 665                 return -ENOMEM;
 666
 667         priv_size = slot ? slot->priv_size : 0;
 668         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
 669         if (IS_ERR(host))
 670                 return PTR_ERR(host);
 671
 672         c = sdhci_priv(host);
 673         c->host = host;
 674         c->slot = slot;
 675         c->pdev = pdev;
 676         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 677
 678         platform_set_drvdata(pdev, c);
 679
 680         host->hw_name   = "ACPI";
 681         host->ops       = &sdhci_acpi_ops_dflt;
 682         host->irq       = platform_get_irq(pdev, 0);
 683         if (host->irq < 0) {
 684                 err = -EINVAL;
 685                 goto err_free;
 686         }
 687
 688         host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
 689                                             resource_size(iomem));
 690         if (host->ioaddr == NULL) {
 691                 err = -ENOMEM;
 692                 goto err_free;
 693         }
 694
 695         if (c->slot) {
 696                 if (c->slot->probe_slot) {
 697                         err = c->slot->probe_slot(pdev, hid, uid);
 698                         if (err)
 699                                 goto err_free;
 700                 }
 701                 if (c->slot->chip) {
 702                         host->ops            = c->slot->chip->ops;
 703                         host->quirks        |= c->slot->chip->quirks;
 704                         host->quirks2       |= c->slot->chip->quirks2;
 705                         host->mmc->caps     |= c->slot->chip->caps;
 706                         host->mmc->caps2    |= c->slot->chip->caps2;
 707                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 708                 }
 709                 host->quirks        |= c->slot->quirks;
 710                 host->quirks2       |= c->slot->quirks2;
 711                 host->mmc->caps     |= c->slot->caps;
 712                 host->mmc->caps2    |= c->slot->caps2;
 713                 host->mmc->pm_caps  |= c->slot->pm_caps;
 714         }
 715
 716         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 717
 718         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 719                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 720
 721                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
 722                 if (err) {
 723                         if (err == -EPROBE_DEFER)
 724                                 goto err_free;
 725                         dev_warn(dev, "failed to setup card detect gpio\n");
 726                         c->use_runtime_pm = false;
 727                 }
 728         }
 729
 730         err = sdhci_setup_host(host);
 731         if (err)
 732                 goto err_free;
 733
 734         if (c->slot && c->slot->setup_host) {
 735                 err = c->slot->setup_host(pdev);
 736                 if (err)
 737                         goto err_cleanup;
 738         }
 739
 740         err = __sdhci_add_host(host);
 741         if (err)
 742                 goto err_cleanup;
 743
 744         if (c->use_runtime_pm) {
 745                 pm_runtime_set_active(dev);
 746                 pm_suspend_ignore_children(dev, 1);
 747                 pm_runtime_set_autosuspend_delay(dev, 50);
 748                 pm_runtime_use_autosuspend(dev);
 749                 pm_runtime_enable(dev);
 750         }
 751
 752         device_enable_async_suspend(dev);
 753
 754         return 0;
 755
 756 err_cleanup:
 757         sdhci_cleanup_host(c->host);
 758 err_free:
 759         sdhci_free_host(c->host);
 760         return err;
 761 }
 762
 763 static int sdhci_acpi_remove(struct platform_device *pdev)
 764 {
 765         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 766         struct device *dev = &pdev->dev;
 767         int dead;
 768
 769         if (c->use_runtime_pm) {
 770                 pm_runtime_get_sync(dev);
 771                 pm_runtime_disable(dev);
 772                 pm_runtime_put_noidle(dev);
 773         }
 774
 775         if (c->slot && c->slot->remove_slot)
 776                 c->slot->remove_slot(pdev);
 777
 778         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 779         sdhci_remove_host(c->host, dead);
 780         sdhci_free_host(c->host);
 781
 782         return 0;
 783 }
 784
 785 #ifdef CONFIG_PM_SLEEP
 786
 787 static int sdhci_acpi_suspend(struct device *dev)
 788 {
 789         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 790         struct sdhci_host *host = c->host;
 791
 792         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 793                 mmc_retune_needed(host->mmc);
 794
 795         return sdhci_suspend_host(host);
 796 }
 797
 798 static int sdhci_acpi_resume(struct device *dev)
 799 {
 800         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 801
 802         sdhci_acpi_byt_setting(&c->pdev->dev);
 803
 804         return sdhci_resume_host(c->host);
 805 }
 806
 807 #endif
 808
 809 #ifdef CONFIG_PM
 810
 811 static int sdhci_acpi_runtime_suspend(struct device *dev)
 812 {
 813         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 814         struct sdhci_host *host = c->host;
 815
 816         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 817                 mmc_retune_needed(host->mmc);
 818
 819         return sdhci_runtime_suspend_host(host);
 820 }
 821
 822 static int sdhci_acpi_runtime_resume(struct device *dev)
 823 {
 824         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 825
 826         sdhci_acpi_byt_setting(&c->pdev->dev);
 827
 828         return sdhci_runtime_resume_host(c->host);
 829 }
 830
 831 #endif
 832
 833 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 834         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 835         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 836                         sdhci_acpi_runtime_resume, NULL)
 837 };
 838
 839 static struct platform_driver sdhci_acpi_driver = {
 840         .driver = {
 841                 .name                   = "sdhci-acpi",
 842                 .acpi_match_table       = sdhci_acpi_ids,
 843                 .pm                     = &sdhci_acpi_pm_ops,
 844         },
 845         .probe  = sdhci_acpi_probe,
 846         .remove = sdhci_acpi_remove,
 847 };
 848
 849 module_platform_driver(sdhci_acpi_driver);
 850
 851 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 852 MODULE_AUTHOR("Adrian Hunter");
 853 MODULE_LICENSE("GPL v2");