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 #include <linux/dmi.h>
  27
  28 #include <linux/mmc/host.h>
  29 #include <linux/mmc/pm.h>
  30 #include <linux/mmc/slot-gpio.h>
  31
  32 #ifdef CONFIG_X86
  33 #include <asm/cpu_device_id.h>
  34 #include <asm/intel-family.h>
  35 #include <asm/iosf_mbi.h>
  36 #include <linux/pci.h>
  37 #endif
  38
  39 #include "sdhci.h"
  40
  41 enum {
  42         SDHCI_ACPI_SD_CD                = BIT(0),
  43         SDHCI_ACPI_RUNTIME_PM           = BIT(1),
  44         SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
  45 };
  46
  47 struct sdhci_acpi_chip {
  48         const struct    sdhci_ops *ops;
  49         unsigned int    quirks;
  50         unsigned int    quirks2;
  51         unsigned long   caps;
  52         unsigned int    caps2;
  53         mmc_pm_flag_t   pm_caps;
  54 };
  55
  56 struct sdhci_acpi_slot {
  57         const struct    sdhci_acpi_chip *chip;
  58         unsigned int    quirks;
  59         unsigned int    quirks2;
  60         unsigned long   caps;
  61         unsigned int    caps2;
  62         mmc_pm_flag_t   pm_caps;
  63         unsigned int    flags;
  64         size_t          priv_size;
  65         int (*probe_slot)(struct platform_device *, struct acpi_device *);
  66         int (*remove_slot)(struct platform_device *);
  67         int (*free_slot)(struct platform_device *pdev);
  68         int (*setup_host)(struct platform_device *pdev);
  69 };
  70
  71 struct sdhci_acpi_host {
  72         struct sdhci_host               *host;
  73         const struct sdhci_acpi_slot    *slot;
  74         struct platform_device          *pdev;
  75         bool                            use_runtime_pm;
  76         bool                            is_intel;
  77         bool                            reset_signal_volt_on_suspend;
  78         unsigned long                   private[0] ____cacheline_aligned;
  79 };
  80
  81 enum {
  82         DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP                  = BIT(0),
  83 };
  84
  85 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
  86 {
  87         return (void *)c->private;
  88 }
  89
  90 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  91 {
  92         return c->slot && (c->slot->flags & flag);
  93 }
  94
  95 #define INTEL_DSM_HS_CAPS_SDR25         BIT(0)
  96 #define INTEL_DSM_HS_CAPS_DDR50         BIT(1)
  97 #define INTEL_DSM_HS_CAPS_SDR50         BIT(2)
  98 #define INTEL_DSM_HS_CAPS_SDR104        BIT(3)
  99
 100 enum {
 101         INTEL_DSM_FNS           =  0,
 102         INTEL_DSM_V18_SWITCH    =  3,
 103         INTEL_DSM_V33_SWITCH    =  4,
 104         INTEL_DSM_HS_CAPS       =  8,
 105 };
 106
 107 struct intel_host {
 108         u32     dsm_fns;
 109         u32     hs_caps;
 110 };
 111
 112 static const guid_t intel_dsm_guid =
 113         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
 114                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 115
 116 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 117                        unsigned int fn, u32 *result)
 118 {
 119         union acpi_object *obj;
 120         int err = 0;
 121
 122         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
 123         if (!obj)
 124                 return -EOPNOTSUPP;
 125
 126         if (obj->type == ACPI_TYPE_INTEGER) {
 127                 *result = obj->integer.value;
 128         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
 129                 size_t len = min_t(size_t, obj->buffer.length, 4);
 130
 131                 *result = 0;
 132                 memcpy(result, obj->buffer.pointer, len);
 133         } else {
 134                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
 135                         __func__, fn, obj->type, obj->buffer.length);
 136                 err = -EINVAL;
 137         }
 138
 139         ACPI_FREE(obj);
 140
 141         return err;
 142 }
 143
 144 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
 145                      unsigned int fn, u32 *result)
 146 {
 147         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
 148                 return -EOPNOTSUPP;
 149
 150         return __intel_dsm(intel_host, dev, fn, result);
 151 }
 152
 153 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
 154                            struct mmc_host *mmc)
 155 {
 156         int err;
 157
 158         intel_host->hs_caps = ~0;
 159
 160         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
 161         if (err) {
 162                 pr_debug("%s: DSM not supported, error %d\n",
 163                          mmc_hostname(mmc), err);
 164                 return;
 165         }
 166
 167         pr_debug("%s: DSM function mask %#x\n",
 168                  mmc_hostname(mmc), intel_host->dsm_fns);
 169
 170         intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
 171 }
 172
 173 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
 174                                              struct mmc_ios *ios)
 175 {
 176         struct device *dev = mmc_dev(mmc);
 177         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 178         struct intel_host *intel_host = sdhci_acpi_priv(c);
 179         unsigned int fn;
 180         u32 result = 0;
 181         int err;
 182
 183         err = sdhci_start_signal_voltage_switch(mmc, ios);
 184         if (err)
 185                 return err;
 186
 187         switch (ios->signal_voltage) {
 188         case MMC_SIGNAL_VOLTAGE_330:
 189                 fn = INTEL_DSM_V33_SWITCH;
 190                 break;
 191         case MMC_SIGNAL_VOLTAGE_180:
 192                 fn = INTEL_DSM_V18_SWITCH;
 193                 break;
 194         default:
 195                 return 0;
 196         }
 197
 198         err = intel_dsm(intel_host, dev, fn, &result);
 199         pr_debug("%s: %s DSM fn %u error %d result %u\n",
 200                  mmc_hostname(mmc), __func__, fn, err, result);
 201
 202         return 0;
 203 }
 204
 205 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
 206 {
 207         u8 reg;
 208
 209         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
 210         reg |= 0x10;
 211         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 212         /* For eMMC, minimum is 1us but give it 9us for good measure */
 213         udelay(9);
 214         reg &= ~0x10;
 215         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 216         /* For eMMC, minimum is 200us but give it 300us for good measure */
 217         usleep_range(300, 1000);
 218 }
 219
 220 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
 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 };
 226
 227 static const struct sdhci_ops sdhci_acpi_ops_int = {
 228         .set_clock = sdhci_set_clock,
 229         .set_bus_width = sdhci_set_bus_width,
 230         .reset = sdhci_reset,
 231         .set_uhs_signaling = sdhci_set_uhs_signaling,
 232         .hw_reset   = sdhci_acpi_int_hw_reset,
 233 };
 234
 235 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 236         .ops = &sdhci_acpi_ops_int,
 237 };
 238
 239 #ifdef CONFIG_X86
 240
 241 static bool sdhci_acpi_byt(void)
 242 {
 243         static const struct x86_cpu_id byt[] = {
 244                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT },
 245                 {}
 246         };
 247
 248         return x86_match_cpu(byt);
 249 }
 250
 251 static bool sdhci_acpi_cht(void)
 252 {
 253         static const struct x86_cpu_id cht[] = {
 254                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
 255                 {}
 256         };
 257
 258         return x86_match_cpu(cht);
 259 }
 260
 261 #define BYT_IOSF_SCCEP                  0x63
 262 #define BYT_IOSF_OCP_NETCTRL0           0x1078
 263 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
 264
 265 static void sdhci_acpi_byt_setting(struct device *dev)
 266 {
 267         u32 val = 0;
 268
 269         if (!sdhci_acpi_byt())
 270                 return;
 271
 272         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
 273                           &val)) {
 274                 dev_err(dev, "%s read error\n", __func__);
 275                 return;
 276         }
 277
 278         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
 279                 return;
 280
 281         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
 282
 283         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
 284                            val)) {
 285                 dev_err(dev, "%s write error\n", __func__);
 286                 return;
 287         }
 288
 289         dev_dbg(dev, "%s completed\n", __func__);
 290 }
 291
 292 static bool sdhci_acpi_byt_defer(struct device *dev)
 293 {
 294         if (!sdhci_acpi_byt())
 295                 return false;
 296
 297         if (!iosf_mbi_available())
 298                 return true;
 299
 300         sdhci_acpi_byt_setting(dev);
 301
 302         return false;
 303 }
 304
 305 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
 306                                     unsigned int slot, unsigned int parent_slot)
 307 {
 308         struct pci_dev *dev, *parent, *from = NULL;
 309
 310         while (1) {
 311                 dev = pci_get_device(vendor, device, from);
 312                 pci_dev_put(from);
 313                 if (!dev)
 314                         break;
 315                 parent = pci_upstream_bridge(dev);
 316                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
 317                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
 318                     !pci_upstream_bridge(parent)) {
 319                         pci_dev_put(dev);
 320                         return true;
 321                 }
 322                 from = dev;
 323         }
 324
 325         return false;
 326 }
 327
 328 /*
 329  * GPDwin uses PCI wifi which conflicts with SDIO's use of
 330  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
 331  * problematic, but since SDIO is only used for wifi, the presence of the PCI
 332  * wifi card in the expected slot with an ACPI companion node, is used to
 333  * indicate that acpi_device_fix_up_power() should be avoided.
 334  */
 335 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
 336 {
 337         return sdhci_acpi_cht() &&
 338                acpi_dev_hid_uid_match(adev, "80860F14", "2") &&
 339                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 340 }
 341
 342 #else
 343
 344 static inline void sdhci_acpi_byt_setting(struct device *dev)
 345 {
 346 }
 347
 348 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 349 {
 350         return false;
 351 }
 352
 353 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
 354 {
 355         return false;
 356 }
 357
 358 #endif
 359
 360 static int bxt_get_cd(struct mmc_host *mmc)
 361 {
 362         int gpio_cd = mmc_gpio_get_cd(mmc);
 363         struct sdhci_host *host = mmc_priv(mmc);
 364         unsigned long flags;
 365         int ret = 0;
 366
 367         if (!gpio_cd)
 368                 return 0;
 369
 370         spin_lock_irqsave(&host->lock, flags);
 371
 372         if (host->flags & SDHCI_DEVICE_DEAD)
 373                 goto out;
 374
 375         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 376 out:
 377         spin_unlock_irqrestore(&host->lock, flags);
 378
 379         return ret;
 380 }
 381
 382 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
 383 {
 384         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 385         struct intel_host *intel_host = sdhci_acpi_priv(c);
 386         struct sdhci_host *host = c->host;
 387
 388         if (acpi_dev_hid_uid_match(adev, "80860F14", "1") &&
 389             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 390             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 391                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 392
 393         if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL))
 394                 host->mmc_host_ops.get_cd = bxt_get_cd;
 395
 396         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
 397
 398         host->mmc_host_ops.start_signal_voltage_switch =
 399                                         intel_start_signal_voltage_switch;
 400
 401         c->is_intel = true;
 402
 403         return 0;
 404 }
 405
 406 static int intel_setup_host(struct platform_device *pdev)
 407 {
 408         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 409         struct intel_host *intel_host = sdhci_acpi_priv(c);
 410
 411         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
 412                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
 413
 414         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
 415                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
 416
 417         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
 418                 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
 419
 420         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
 421                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
 422
 423         return 0;
 424 }
 425
 426 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 427         .chip    = &sdhci_acpi_chip_int,
 428         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 429                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 430                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 431         .flags   = SDHCI_ACPI_RUNTIME_PM,
 432         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
 433                    SDHCI_QUIRK_NO_LED,
 434         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 435                    SDHCI_QUIRK2_STOP_WITH_TC |
 436                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 437         .probe_slot     = intel_probe_slot,
 438         .setup_host     = intel_setup_host,
 439         .priv_size      = sizeof(struct intel_host),
 440 };
 441
 442 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 443         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 444                    SDHCI_QUIRK_NO_LED |
 445                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 446         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 447         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 448                    MMC_CAP_WAIT_WHILE_BUSY,
 449         .flags   = SDHCI_ACPI_RUNTIME_PM,
 450         .pm_caps = MMC_PM_KEEP_POWER,
 451         .probe_slot     = intel_probe_slot,
 452         .setup_host     = intel_setup_host,
 453         .priv_size      = sizeof(struct intel_host),
 454 };
 455
 456 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 457         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 458                    SDHCI_ACPI_RUNTIME_PM,
 459         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
 460                    SDHCI_QUIRK_NO_LED,
 461         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 462                    SDHCI_QUIRK2_STOP_WITH_TC,
 463         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 464         .probe_slot     = intel_probe_slot,
 465         .setup_host     = intel_setup_host,
 466         .priv_size      = sizeof(struct intel_host),
 467 };
 468
 469 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG        0x1a8
 470 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG          0x1ac
 471 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
 472 {
 473         struct sdhci_host *host = ptr;
 474
 475         sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
 476         sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
 477
 478         return IRQ_HANDLED;
 479 }
 480
 481 static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
 482 {
 483         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 484         struct sdhci_host *host = c->host;
 485         int *irq = sdhci_acpi_priv(c);
 486
 487         *irq = -EINVAL;
 488
 489         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
 490                 return 0;
 491
 492         *irq = platform_get_irq(pdev, 1);
 493         if (*irq < 0)
 494                 return 0;
 495
 496         return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
 497                                     IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
 498                                     "sdhci_qcom", host);
 499 }
 500
 501 static int qcom_free_slot(struct platform_device *pdev)
 502 {
 503         struct device *dev = &pdev->dev;
 504         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 505         struct sdhci_host *host = c->host;
 506         struct acpi_device *adev;
 507         int *irq = sdhci_acpi_priv(c);
 508
 509         adev = ACPI_COMPANION(dev);
 510         if (!adev)
 511                 return -ENODEV;
 512
 513         if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
 514                 return 0;
 515
 516         if (*irq < 0)
 517                 return 0;
 518
 519         free_irq(*irq, host);
 520         return 0;
 521 }
 522
 523 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 524         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 525         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 526         .caps    = MMC_CAP_NONREMOVABLE,
 527         .priv_size      = sizeof(int),
 528         .probe_slot     = qcom_probe_slot,
 529         .free_slot      = qcom_free_slot,
 530 };
 531
 532 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 533         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 534         .caps    = MMC_CAP_NONREMOVABLE,
 535 };
 536
 537 /* AMD sdhci reset dll register. */
 538 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
 539
 540 static int amd_select_drive_strength(struct mmc_card *card,
 541                                      unsigned int max_dtr, int host_drv,
 542                                      int card_drv, int *drv_type)
 543 {
 544         return MMC_SET_DRIVER_TYPE_A;
 545 }
 546
 547 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
 548 {
 549         /* AMD Platform requires dll setting */
 550         sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
 551         usleep_range(10, 20);
 552         sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
 553 }
 554
 555 /*
 556  * For AMD Platform it is required to disable the tuning
 557  * bit first controller to bring to HS Mode from HS200
 558  * mode, later enable to tune to HS400 mode.
 559  */
 560 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 561 {
 562         struct sdhci_host *host = mmc_priv(mmc);
 563         unsigned int old_timing = host->timing;
 564
 565         sdhci_set_ios(mmc, ios);
 566         if (old_timing == MMC_TIMING_MMC_HS200 &&
 567             ios->timing == MMC_TIMING_MMC_HS)
 568                 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
 569         if (old_timing != MMC_TIMING_MMC_HS400 &&
 570             ios->timing == MMC_TIMING_MMC_HS400) {
 571                 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
 572                 sdhci_acpi_amd_hs400_dll(host);
 573         }
 574 }
 575
 576 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 577         .set_clock      = sdhci_set_clock,
 578         .set_bus_width  = sdhci_set_bus_width,
 579         .reset          = sdhci_reset,
 580         .set_uhs_signaling = sdhci_set_uhs_signaling,
 581 };
 582
 583 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
 584         .ops = &sdhci_acpi_ops_amd,
 585 };
 586
 587 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
 588                                           struct acpi_device *adev)
 589 {
 590         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 591         struct sdhci_host *host   = c->host;
 592
 593         sdhci_read_caps(host);
 594         if (host->caps1 & SDHCI_SUPPORT_DDR50)
 595                 host->mmc->caps = MMC_CAP_1_8V_DDR;
 596
 597         if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
 598             (host->mmc->caps & MMC_CAP_1_8V_DDR))
 599                 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
 600
 601         host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
 602         host->mmc_host_ops.set_ios = amd_set_ios;
 603         return 0;
 604 }
 605
 606 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
 607         .chip   = &sdhci_acpi_chip_amd,
 608         .caps   = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
 609         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
 610                         SDHCI_QUIRK_32BIT_ADMA_SIZE,
 611         .probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
 612 };
 613
 614 struct sdhci_acpi_uid_slot {
 615         const char *hid;
 616         const char *uid;
 617         const struct sdhci_acpi_slot *slot;
 618 };
 619
 620 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 621         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 622         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 623         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 624         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 625         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 626         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 627         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 628         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 629         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 630         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 631         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 632         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 633         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 634         { "PNP0D40"  },
 635         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 636         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 637         { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
 638         { },
 639 };
 640
 641 static const struct acpi_device_id sdhci_acpi_ids[] = {
 642         { "80865ACA" },
 643         { "80865ACC" },
 644         { "80865AD0" },
 645         { "80860F14" },
 646         { "80860F16" },
 647         { "INT33BB"  },
 648         { "INT33C6"  },
 649         { "INT3436"  },
 650         { "INT344D"  },
 651         { "PNP0D40"  },
 652         { "QCOM8051" },
 653         { "QCOM8052" },
 654         { "AMDI0040" },
 655         { },
 656 };
 657 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 658
 659 static const struct dmi_system_id sdhci_acpi_quirks[] = {
 660         {
 661                 /*
 662                  * The Lenovo Miix 320-10ICR has a bug in the _PS0 method of
 663                  * the SHC1 ACPI device, this bug causes it to reprogram the
 664                  * wrong LDO (DLDO3) to 1.8V if 1.8V modes are used and the
 665                  * card is (runtime) suspended + resumed. DLDO3 is used for
 666                  * the LCD and setting it to 1.8V causes the LCD to go black.
 667                  */
 668                 .matches = {
 669                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 670                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
 671                 },
 672                 .driver_data = (void *)DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP,
 673         },
 674         {} /* Terminating entry */
 675 };
 676
 677 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev)
 678 {
 679         const struct sdhci_acpi_uid_slot *u;
 680
 681         for (u = sdhci_acpi_uids; u->hid; u++) {
 682                 if (acpi_dev_hid_uid_match(adev, u->hid, u->uid))
 683                         return u->slot;
 684         }
 685         return NULL;
 686 }
 687
 688 static int sdhci_acpi_probe(struct platform_device *pdev)
 689 {
 690         struct device *dev = &pdev->dev;
 691         const struct sdhci_acpi_slot *slot;
 692         struct acpi_device *device, *child;
 693         const struct dmi_system_id *id;
 694         struct sdhci_acpi_host *c;
 695         struct sdhci_host *host;
 696         struct resource *iomem;
 697         resource_size_t len;
 698         size_t priv_size;
 699         int quirks = 0;
 700         int err;
 701
 702         device = ACPI_COMPANION(dev);
 703         if (!device)
 704                 return -ENODEV;
 705
 706         id = dmi_first_match(sdhci_acpi_quirks);
 707         if (id)
 708                 quirks = (long)id->driver_data;
 709
 710         slot = sdhci_acpi_get_slot(device);
 711
 712         /* Power on the SDHCI controller and its children */
 713         acpi_device_fix_up_power(device);
 714         if (!sdhci_acpi_no_fixup_child_power(device)) {
 715                 list_for_each_entry(child, &device->children, node)
 716                         if (child->status.present && child->status.enabled)
 717                                 acpi_device_fix_up_power(child);
 718         }
 719
 720         if (sdhci_acpi_byt_defer(dev))
 721                 return -EPROBE_DEFER;
 722
 723         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 724         if (!iomem)
 725                 return -ENOMEM;
 726
 727         len = resource_size(iomem);
 728         if (len < 0x100)
 729                 dev_err(dev, "Invalid iomem size!\n");
 730
 731         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 732                 return -ENOMEM;
 733
 734         priv_size = slot ? slot->priv_size : 0;
 735         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
 736         if (IS_ERR(host))
 737                 return PTR_ERR(host);
 738
 739         c = sdhci_priv(host);
 740         c->host = host;
 741         c->slot = slot;
 742         c->pdev = pdev;
 743         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 744
 745         platform_set_drvdata(pdev, c);
 746
 747         host->hw_name   = "ACPI";
 748         host->ops       = &sdhci_acpi_ops_dflt;
 749         host->irq       = platform_get_irq(pdev, 0);
 750         if (host->irq < 0) {
 751                 err = -EINVAL;
 752                 goto err_free;
 753         }
 754
 755         host->ioaddr = devm_ioremap(dev, iomem->start,
 756                                             resource_size(iomem));
 757         if (host->ioaddr == NULL) {
 758                 err = -ENOMEM;
 759                 goto err_free;
 760         }
 761
 762         if (c->slot) {
 763                 if (c->slot->probe_slot) {
 764                         err = c->slot->probe_slot(pdev, device);
 765                         if (err)
 766                                 goto err_free;
 767                 }
 768                 if (c->slot->chip) {
 769                         host->ops            = c->slot->chip->ops;
 770                         host->quirks        |= c->slot->chip->quirks;
 771                         host->quirks2       |= c->slot->chip->quirks2;
 772                         host->mmc->caps     |= c->slot->chip->caps;
 773                         host->mmc->caps2    |= c->slot->chip->caps2;
 774                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 775                 }
 776                 host->quirks        |= c->slot->quirks;
 777                 host->quirks2       |= c->slot->quirks2;
 778                 host->mmc->caps     |= c->slot->caps;
 779                 host->mmc->caps2    |= c->slot->caps2;
 780                 host->mmc->pm_caps  |= c->slot->pm_caps;
 781         }
 782
 783         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 784
 785         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 786                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 787
 788                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0);
 789                 if (err) {
 790                         if (err == -EPROBE_DEFER)
 791                                 goto err_free;
 792                         dev_warn(dev, "failed to setup card detect gpio\n");
 793                         c->use_runtime_pm = false;
 794                 }
 795
 796                 if (quirks & DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP)
 797                         c->reset_signal_volt_on_suspend = true;
 798         }
 799
 800         err = sdhci_setup_host(host);
 801         if (err)
 802                 goto err_free;
 803
 804         if (c->slot && c->slot->setup_host) {
 805                 err = c->slot->setup_host(pdev);
 806                 if (err)
 807                         goto err_cleanup;
 808         }
 809
 810         err = __sdhci_add_host(host);
 811         if (err)
 812                 goto err_cleanup;
 813
 814         if (c->use_runtime_pm) {
 815                 pm_runtime_set_active(dev);
 816                 pm_suspend_ignore_children(dev, 1);
 817                 pm_runtime_set_autosuspend_delay(dev, 50);
 818                 pm_runtime_use_autosuspend(dev);
 819                 pm_runtime_enable(dev);
 820         }
 821
 822         device_enable_async_suspend(dev);
 823
 824         return 0;
 825
 826 err_cleanup:
 827         sdhci_cleanup_host(c->host);
 828 err_free:
 829         if (c->slot && c->slot->free_slot)
 830                 c->slot->free_slot(pdev);
 831
 832         sdhci_free_host(c->host);
 833         return err;
 834 }
 835
 836 static int sdhci_acpi_remove(struct platform_device *pdev)
 837 {
 838         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 839         struct device *dev = &pdev->dev;
 840         int dead;
 841
 842         if (c->use_runtime_pm) {
 843                 pm_runtime_get_sync(dev);
 844                 pm_runtime_disable(dev);
 845                 pm_runtime_put_noidle(dev);
 846         }
 847
 848         if (c->slot && c->slot->remove_slot)
 849                 c->slot->remove_slot(pdev);
 850
 851         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 852         sdhci_remove_host(c->host, dead);
 853
 854         if (c->slot && c->slot->free_slot)
 855                 c->slot->free_slot(pdev);
 856
 857         sdhci_free_host(c->host);
 858
 859         return 0;
 860 }
 861
 862 static void __maybe_unused sdhci_acpi_reset_signal_voltage_if_needed(
 863         struct device *dev)
 864 {
 865         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 866         struct sdhci_host *host = c->host;
 867
 868         if (c->is_intel && c->reset_signal_volt_on_suspend &&
 869             host->mmc->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_330) {
 870                 struct intel_host *intel_host = sdhci_acpi_priv(c);
 871                 unsigned int fn = INTEL_DSM_V33_SWITCH;
 872                 u32 result = 0;
 873
 874                 intel_dsm(intel_host, dev, fn, &result);
 875         }
 876 }
 877
 878 #ifdef CONFIG_PM_SLEEP
 879
 880 static int sdhci_acpi_suspend(struct device *dev)
 881 {
 882         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 883         struct sdhci_host *host = c->host;
 884         int ret;
 885
 886         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 887                 mmc_retune_needed(host->mmc);
 888
 889         ret = sdhci_suspend_host(host);
 890         if (ret)
 891                 return ret;
 892
 893         sdhci_acpi_reset_signal_voltage_if_needed(dev);
 894         return 0;
 895 }
 896
 897 static int sdhci_acpi_resume(struct device *dev)
 898 {
 899         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 900
 901         sdhci_acpi_byt_setting(&c->pdev->dev);
 902
 903         return sdhci_resume_host(c->host);
 904 }
 905
 906 #endif
 907
 908 #ifdef CONFIG_PM
 909
 910 static int sdhci_acpi_runtime_suspend(struct device *dev)
 911 {
 912         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 913         struct sdhci_host *host = c->host;
 914         int ret;
 915
 916         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 917                 mmc_retune_needed(host->mmc);
 918
 919         ret = sdhci_runtime_suspend_host(host);
 920         if (ret)
 921                 return ret;
 922
 923         sdhci_acpi_reset_signal_voltage_if_needed(dev);
 924         return 0;
 925 }
 926
 927 static int sdhci_acpi_runtime_resume(struct device *dev)
 928 {
 929         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 930
 931         sdhci_acpi_byt_setting(&c->pdev->dev);
 932
 933         return sdhci_runtime_resume_host(c->host, 0);
 934 }
 935
 936 #endif
 937
 938 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 939         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 940         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 941                         sdhci_acpi_runtime_resume, NULL)
 942 };
 943
 944 static struct platform_driver sdhci_acpi_driver = {
 945         .driver = {
 946                 .name                   = "sdhci-acpi",
 947                 .acpi_match_table       = sdhci_acpi_ids,
 948                 .pm                     = &sdhci_acpi_pm_ops,
 949         },
 950         .probe  = sdhci_acpi_probe,
 951         .remove = sdhci_acpi_remove,
 952 };
 953
 954 module_platform_driver(sdhci_acpi_driver);
 955
 956 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 957 MODULE_AUTHOR("Adrian Hunter");
 958 MODULE_LICENSE("GPL v2");