drivers/mmc/host/sdhci-acpi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Secure Digital Host Controller Interface ACPI driver.
   4  *
   5  * Copyright (c) 2012, Intel Corporation.
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/export.h>
  10 #include <linux/module.h>
  11 #include <linux/device.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/ioport.h>
  14 #include <linux/io.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/compiler.h>
  17 #include <linux/stddef.h>
  18 #include <linux/bitops.h>
  19 #include <linux/types.h>
  20 #include <linux/err.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/acpi.h>
  23 #include <linux/pm.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/delay.h>
  26
  27 #include <linux/mmc/host.h>
  28 #include <linux/mmc/pm.h>
  29 #include <linux/mmc/slot-gpio.h>
  30
  31 #ifdef CONFIG_X86
  32 #include <asm/cpu_device_id.h>
  33 #include <asm/intel-family.h>
  34 #include <asm/iosf_mbi.h>
  35 #include <linux/pci.h>
  36 #endif
  37
  38 #include "sdhci.h"
  39
  40 enum {
  41         SDHCI_ACPI_SD_CD                = BIT(0),
  42         SDHCI_ACPI_RUNTIME_PM           = BIT(1),
  43         SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
  44 };
  45
  46 struct sdhci_acpi_chip {
  47         const struct    sdhci_ops *ops;
  48         unsigned int    quirks;
  49         unsigned int    quirks2;
  50         unsigned long   caps;
  51         unsigned int    caps2;
  52         mmc_pm_flag_t   pm_caps;
  53 };
  54
  55 struct sdhci_acpi_slot {
  56         const struct    sdhci_acpi_chip *chip;
  57         unsigned int    quirks;
  58         unsigned int    quirks2;
  59         unsigned long   caps;
  60         unsigned int    caps2;
  61         mmc_pm_flag_t   pm_caps;
  62         unsigned int    flags;
  63         size_t          priv_size;
  64         int (*probe_slot)(struct platform_device *, struct acpi_device *);
  65         int (*remove_slot)(struct platform_device *);
  66         int (*free_slot)(struct platform_device *pdev);
  67         int (*setup_host)(struct platform_device *pdev);
  68 };
  69
  70 struct sdhci_acpi_host {
  71         struct sdhci_host               *host;
  72         const struct sdhci_acpi_slot    *slot;
  73         struct platform_device          *pdev;
  74         bool                            use_runtime_pm;
  75         unsigned long                   private[0] ____cacheline_aligned;
  76 };
  77
  78 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
  79 {
  80         return (void *)c->private;
  81 }
  82
  83 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  84 {
  85         return c->slot && (c->slot->flags & flag);
  86 }
  87
  88 #define INTEL_DSM_HS_CAPS_SDR25         BIT(0)
  89 #define INTEL_DSM_HS_CAPS_DDR50         BIT(1)
  90 #define INTEL_DSM_HS_CAPS_SDR50         BIT(2)
  91 #define INTEL_DSM_HS_CAPS_SDR104        BIT(3)
  92
  93 enum {
  94         INTEL_DSM_FNS           =  0,
  95         INTEL_DSM_V18_SWITCH    =  3,
  96         INTEL_DSM_V33_SWITCH    =  4,
  97         INTEL_DSM_HS_CAPS       =  8,
  98 };
  99
 100 struct intel_host {
 101         u32     dsm_fns;
 102         u32     hs_caps;
 103 };
 104
 105 static const guid_t intel_dsm_guid =
 106         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
 107                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 108
 109 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 110                        unsigned int fn, u32 *result)
 111 {
 112         union acpi_object *obj;
 113         int err = 0;
 114
 115         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
 116         if (!obj)
 117                 return -EOPNOTSUPP;
 118
 119         if (obj->type == ACPI_TYPE_INTEGER) {
 120                 *result = obj->integer.value;
 121         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
 122                 size_t len = min_t(size_t, obj->buffer.length, 4);
 123
 124                 *result = 0;
 125                 memcpy(result, obj->buffer.pointer, len);
 126         } else {
 127                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
 128                         __func__, fn, obj->type, obj->buffer.length);
 129                 err = -EINVAL;
 130         }
 131
 132         ACPI_FREE(obj);
 133
 134         return err;
 135 }
 136
 137 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
 138                      unsigned int fn, u32 *result)
 139 {
 140         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
 141                 return -EOPNOTSUPP;
 142
 143         return __intel_dsm(intel_host, dev, fn, result);
 144 }
 145
 146 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
 147                            struct mmc_host *mmc)
 148 {
 149         int err;
 150
 151         intel_host->hs_caps = ~0;
 152
 153         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
 154         if (err) {
 155                 pr_debug("%s: DSM not supported, error %d\n",
 156                          mmc_hostname(mmc), err);
 157                 return;
 158         }
 159
 160         pr_debug("%s: DSM function mask %#x\n",
 161                  mmc_hostname(mmc), intel_host->dsm_fns);
 162
 163         intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
 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_SILVERMONT },
 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(struct acpi_device *adev)
 329 {
 330         return sdhci_acpi_cht() &&
 331                acpi_dev_hid_uid_match(adev, "80860F14", "2") &&
 332                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 333 }
 334
 335 #else
 336
 337 static inline void sdhci_acpi_byt_setting(struct device *dev)
 338 {
 339 }
 340
 341 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 342 {
 343         return false;
 344 }
 345
 346 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
 347 {
 348         return false;
 349 }
 350
 351 #endif
 352
 353 static int bxt_get_cd(struct mmc_host *mmc)
 354 {
 355         int gpio_cd = mmc_gpio_get_cd(mmc);
 356         struct sdhci_host *host = mmc_priv(mmc);
 357         unsigned long flags;
 358         int ret = 0;
 359
 360         if (!gpio_cd)
 361                 return 0;
 362
 363         spin_lock_irqsave(&host->lock, flags);
 364
 365         if (host->flags & SDHCI_DEVICE_DEAD)
 366                 goto out;
 367
 368         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 369 out:
 370         spin_unlock_irqrestore(&host->lock, flags);
 371
 372         return ret;
 373 }
 374
 375 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
 376 {
 377         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 378         struct intel_host *intel_host = sdhci_acpi_priv(c);
 379         struct sdhci_host *host = c->host;
 380
 381         if (acpi_dev_hid_uid_match(adev, "80860F14", "1") &&
 382             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 383             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 384                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 385
 386         if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL))
 387                 host->mmc_host_ops.get_cd = bxt_get_cd;
 388
 389         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
 390
 391         host->mmc_host_ops.start_signal_voltage_switch =
 392                                         intel_start_signal_voltage_switch;
 393
 394         return 0;
 395 }
 396
 397 static int intel_setup_host(struct platform_device *pdev)
 398 {
 399         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 400         struct intel_host *intel_host = sdhci_acpi_priv(c);
 401
 402         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
 403                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
 404
 405         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
 406                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
 407
 408         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
 409                 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
 410
 411         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
 412                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
 413
 414         return 0;
 415 }
 416
 417 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 418         .chip    = &sdhci_acpi_chip_int,
 419         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 420                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 421                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 422         .flags   = SDHCI_ACPI_RUNTIME_PM,
 423         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
 424                    SDHCI_QUIRK_NO_LED,
 425         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 426                    SDHCI_QUIRK2_STOP_WITH_TC |
 427                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 428         .probe_slot     = intel_probe_slot,
 429         .setup_host     = intel_setup_host,
 430         .priv_size      = sizeof(struct intel_host),
 431 };
 432
 433 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 434         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 435                    SDHCI_QUIRK_NO_LED |
 436                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 437         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 438         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 439                    MMC_CAP_WAIT_WHILE_BUSY,
 440         .flags   = SDHCI_ACPI_RUNTIME_PM,
 441         .pm_caps = MMC_PM_KEEP_POWER,
 442         .probe_slot     = intel_probe_slot,
 443         .setup_host     = intel_setup_host,
 444         .priv_size      = sizeof(struct intel_host),
 445 };
 446
 447 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 448         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 449                    SDHCI_ACPI_RUNTIME_PM,
 450         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
 451                    SDHCI_QUIRK_NO_LED,
 452         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 453                    SDHCI_QUIRK2_STOP_WITH_TC,
 454         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 455         .probe_slot     = intel_probe_slot,
 456         .setup_host     = intel_setup_host,
 457         .priv_size      = sizeof(struct intel_host),
 458 };
 459
 460 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG        0x1a8
 461 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG          0x1ac
 462 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
 463 {
 464         struct sdhci_host *host = ptr;
 465
 466         sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
 467         sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
 468
 469         return IRQ_HANDLED;
 470 }
 471
 472 static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
 473 {
 474         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 475         struct sdhci_host *host = c->host;
 476         int *irq = sdhci_acpi_priv(c);
 477
 478         *irq = -EINVAL;
 479
 480         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
 481                 return 0;
 482
 483         *irq = platform_get_irq(pdev, 1);
 484         if (*irq < 0)
 485                 return 0;
 486
 487         return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
 488                                     IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
 489                                     "sdhci_qcom", host);
 490 }
 491
 492 static int qcom_free_slot(struct platform_device *pdev)
 493 {
 494         struct device *dev = &pdev->dev;
 495         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 496         struct sdhci_host *host = c->host;
 497         struct acpi_device *adev;
 498         int *irq = sdhci_acpi_priv(c);
 499
 500         adev = ACPI_COMPANION(dev);
 501         if (!adev)
 502                 return -ENODEV;
 503
 504         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
 505                 return 0;
 506
 507         if (*irq < 0)
 508                 return 0;
 509
 510         free_irq(*irq, host);
 511         return 0;
 512 }
 513
 514 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 515         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 516         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 517         .caps    = MMC_CAP_NONREMOVABLE,
 518         .priv_size      = sizeof(int),
 519         .probe_slot     = qcom_probe_slot,
 520         .free_slot      = qcom_free_slot,
 521 };
 522
 523 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 524         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 525         .caps    = MMC_CAP_NONREMOVABLE,
 526 };
 527
 528 /* AMD sdhci reset dll register. */
 529 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
 530
 531 static int amd_select_drive_strength(struct mmc_card *card,
 532                                      unsigned int max_dtr, int host_drv,
 533                                      int card_drv, int *drv_type)
 534 {
 535         return MMC_SET_DRIVER_TYPE_A;
 536 }
 537
 538 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
 539 {
 540         /* AMD Platform requires dll setting */
 541         sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
 542         usleep_range(10, 20);
 543         sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
 544 }
 545
 546 /*
 547  * For AMD Platform it is required to disable the tuning
 548  * bit first controller to bring to HS Mode from HS200
 549  * mode, later enable to tune to HS400 mode.
 550  */
 551 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 552 {
 553         struct sdhci_host *host = mmc_priv(mmc);
 554         unsigned int old_timing = host->timing;
 555
 556         sdhci_set_ios(mmc, ios);
 557         if (old_timing == MMC_TIMING_MMC_HS200 &&
 558             ios->timing == MMC_TIMING_MMC_HS)
 559                 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
 560         if (old_timing != MMC_TIMING_MMC_HS400 &&
 561             ios->timing == MMC_TIMING_MMC_HS400) {
 562                 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
 563                 sdhci_acpi_amd_hs400_dll(host);
 564         }
 565 }
 566
 567 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 568         .set_clock      = sdhci_set_clock,
 569         .set_bus_width  = sdhci_set_bus_width,
 570         .reset          = sdhci_reset,
 571         .set_uhs_signaling = sdhci_set_uhs_signaling,
 572 };
 573
 574 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
 575         .ops = &sdhci_acpi_ops_amd,
 576 };
 577
 578 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
 579                                           struct acpi_device *adev)
 580 {
 581         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 582         struct sdhci_host *host   = c->host;
 583
 584         sdhci_read_caps(host);
 585         if (host->caps1 & SDHCI_SUPPORT_DDR50)
 586                 host->mmc->caps = MMC_CAP_1_8V_DDR;
 587
 588         if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
 589             (host->mmc->caps & MMC_CAP_1_8V_DDR))
 590                 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
 591
 592         host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
 593         host->mmc_host_ops.set_ios = amd_set_ios;
 594         return 0;
 595 }
 596
 597 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
 598         .chip   = &sdhci_acpi_chip_amd,
 599         .caps   = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
 600         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
 601                         SDHCI_QUIRK_32BIT_ADMA_SIZE,
 602         .probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
 603 };
 604
 605 struct sdhci_acpi_uid_slot {
 606         const char *hid;
 607         const char *uid;
 608         const struct sdhci_acpi_slot *slot;
 609 };
 610
 611 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 612         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 613         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 614         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 615         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 616         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 617         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 618         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 619         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 620         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 621         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 622         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 623         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 624         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 625         { "PNP0D40"  },
 626         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 627         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 628         { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
 629         { },
 630 };
 631
 632 static const struct acpi_device_id sdhci_acpi_ids[] = {
 633         { "80865ACA" },
 634         { "80865ACC" },
 635         { "80865AD0" },
 636         { "80860F14" },
 637         { "80860F16" },
 638         { "INT33BB"  },
 639         { "INT33C6"  },
 640         { "INT3436"  },
 641         { "INT344D"  },
 642         { "PNP0D40"  },
 643         { "QCOM8051" },
 644         { "QCOM8052" },
 645         { "AMDI0040" },
 646         { },
 647 };
 648 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 649
 650 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev)
 651 {
 652         const struct sdhci_acpi_uid_slot *u;
 653
 654         for (u = sdhci_acpi_uids; u->hid; u++) {
 655                 if (acpi_dev_hid_uid_match(adev, u->hid, u->uid))
 656                         return u->slot;
 657         }
 658         return NULL;
 659 }
 660
 661 static int sdhci_acpi_probe(struct platform_device *pdev)
 662 {
 663         struct device *dev = &pdev->dev;
 664         const struct sdhci_acpi_slot *slot;
 665         struct acpi_device *device, *child;
 666         struct sdhci_acpi_host *c;
 667         struct sdhci_host *host;
 668         struct resource *iomem;
 669         resource_size_t len;
 670         size_t priv_size;
 671         int err;
 672
 673         device = ACPI_COMPANION(dev);
 674         if (!device)
 675                 return -ENODEV;
 676
 677         slot = sdhci_acpi_get_slot(device);
 678
 679         /* Power on the SDHCI controller and its children */
 680         acpi_device_fix_up_power(device);
 681         if (!sdhci_acpi_no_fixup_child_power(device)) {
 682                 list_for_each_entry(child, &device->children, node)
 683                         if (child->status.present && child->status.enabled)
 684                                 acpi_device_fix_up_power(child);
 685         }
 686
 687         if (sdhci_acpi_byt_defer(dev))
 688                 return -EPROBE_DEFER;
 689
 690         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 691         if (!iomem)
 692                 return -ENOMEM;
 693
 694         len = resource_size(iomem);
 695         if (len < 0x100)
 696                 dev_err(dev, "Invalid iomem size!\n");
 697
 698         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 699                 return -ENOMEM;
 700
 701         priv_size = slot ? slot->priv_size : 0;
 702         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
 703         if (IS_ERR(host))
 704                 return PTR_ERR(host);
 705
 706         c = sdhci_priv(host);
 707         c->host = host;
 708         c->slot = slot;
 709         c->pdev = pdev;
 710         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 711
 712         platform_set_drvdata(pdev, c);
 713
 714         host->hw_name   = "ACPI";
 715         host->ops       = &sdhci_acpi_ops_dflt;
 716         host->irq       = platform_get_irq(pdev, 0);
 717         if (host->irq < 0) {
 718                 err = -EINVAL;
 719                 goto err_free;
 720         }
 721
 722         host->ioaddr = devm_ioremap(dev, iomem->start,
 723                                             resource_size(iomem));
 724         if (host->ioaddr == NULL) {
 725                 err = -ENOMEM;
 726                 goto err_free;
 727         }
 728
 729         if (c->slot) {
 730                 if (c->slot->probe_slot) {
 731                         err = c->slot->probe_slot(pdev, device);
 732                         if (err)
 733                                 goto err_free;
 734                 }
 735                 if (c->slot->chip) {
 736                         host->ops            = c->slot->chip->ops;
 737                         host->quirks        |= c->slot->chip->quirks;
 738                         host->quirks2       |= c->slot->chip->quirks2;
 739                         host->mmc->caps     |= c->slot->chip->caps;
 740                         host->mmc->caps2    |= c->slot->chip->caps2;
 741                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 742                 }
 743                 host->quirks        |= c->slot->quirks;
 744                 host->quirks2       |= c->slot->quirks2;
 745                 host->mmc->caps     |= c->slot->caps;
 746                 host->mmc->caps2    |= c->slot->caps2;
 747                 host->mmc->pm_caps  |= c->slot->pm_caps;
 748         }
 749
 750         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 751
 752         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 753                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 754
 755                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0);
 756                 if (err) {
 757                         if (err == -EPROBE_DEFER)
 758                                 goto err_free;
 759                         dev_warn(dev, "failed to setup card detect gpio\n");
 760                         c->use_runtime_pm = false;
 761                 }
 762         }
 763
 764         err = sdhci_setup_host(host);
 765         if (err)
 766                 goto err_free;
 767
 768         if (c->slot && c->slot->setup_host) {
 769                 err = c->slot->setup_host(pdev);
 770                 if (err)
 771                         goto err_cleanup;
 772         }
 773
 774         err = __sdhci_add_host(host);
 775         if (err)
 776                 goto err_cleanup;
 777
 778         if (c->use_runtime_pm) {
 779                 pm_runtime_set_active(dev);
 780                 pm_suspend_ignore_children(dev, 1);
 781                 pm_runtime_set_autosuspend_delay(dev, 50);
 782                 pm_runtime_use_autosuspend(dev);
 783                 pm_runtime_enable(dev);
 784         }
 785
 786         device_enable_async_suspend(dev);
 787
 788         return 0;
 789
 790 err_cleanup:
 791         sdhci_cleanup_host(c->host);
 792 err_free:
 793         if (c->slot && c->slot->free_slot)
 794                 c->slot->free_slot(pdev);
 795
 796         sdhci_free_host(c->host);
 797         return err;
 798 }
 799
 800 static int sdhci_acpi_remove(struct platform_device *pdev)
 801 {
 802         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 803         struct device *dev = &pdev->dev;
 804         int dead;
 805
 806         if (c->use_runtime_pm) {
 807                 pm_runtime_get_sync(dev);
 808                 pm_runtime_disable(dev);
 809                 pm_runtime_put_noidle(dev);
 810         }
 811
 812         if (c->slot && c->slot->remove_slot)
 813                 c->slot->remove_slot(pdev);
 814
 815         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 816         sdhci_remove_host(c->host, dead);
 817
 818         if (c->slot && c->slot->free_slot)
 819                 c->slot->free_slot(pdev);
 820
 821         sdhci_free_host(c->host);
 822
 823         return 0;
 824 }
 825
 826 #ifdef CONFIG_PM_SLEEP
 827
 828 static int sdhci_acpi_suspend(struct device *dev)
 829 {
 830         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 831         struct sdhci_host *host = c->host;
 832
 833         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 834                 mmc_retune_needed(host->mmc);
 835
 836         return sdhci_suspend_host(host);
 837 }
 838
 839 static int sdhci_acpi_resume(struct device *dev)
 840 {
 841         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 842
 843         sdhci_acpi_byt_setting(&c->pdev->dev);
 844
 845         return sdhci_resume_host(c->host);
 846 }
 847
 848 #endif
 849
 850 #ifdef CONFIG_PM
 851
 852 static int sdhci_acpi_runtime_suspend(struct device *dev)
 853 {
 854         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 855         struct sdhci_host *host = c->host;
 856
 857         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 858                 mmc_retune_needed(host->mmc);
 859
 860         return sdhci_runtime_suspend_host(host);
 861 }
 862
 863 static int sdhci_acpi_runtime_resume(struct device *dev)
 864 {
 865         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 866
 867         sdhci_acpi_byt_setting(&c->pdev->dev);
 868
 869         return sdhci_runtime_resume_host(c->host, 0);
 870 }
 871
 872 #endif
 873
 874 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 875         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 876         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 877                         sdhci_acpi_runtime_resume, NULL)
 878 };
 879
 880 static struct platform_driver sdhci_acpi_driver = {
 881         .driver = {
 882                 .name                   = "sdhci-acpi",
 883                 .acpi_match_table       = sdhci_acpi_ids,
 884                 .pm                     = &sdhci_acpi_pm_ops,
 885         },
 886         .probe  = sdhci_acpi_probe,
 887         .remove = sdhci_acpi_remove,
 888 };
 889
 890 module_platform_driver(sdhci_acpi_driver);
 891
 892 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 893 MODULE_AUTHOR("Adrian Hunter");
 894 MODULE_LICENSE("GPL v2");