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 (*free_slot)(struct platform_device *pdev);
  80         int (*setup_host)(struct platform_device *pdev);
  81 };
  82
  83 struct sdhci_acpi_host {
  84         struct sdhci_host               *host;
  85         const struct sdhci_acpi_slot    *slot;
  86         struct platform_device          *pdev;
  87         bool                            use_runtime_pm;
  88         unsigned long                   private[0] ____cacheline_aligned;
  89 };
  90
  91 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
  92 {
  93         return (void *)c->private;
  94 }
  95
  96 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
  97 {
  98         return c->slot && (c->slot->flags & flag);
  99 }
 100
 101 #define INTEL_DSM_HS_CAPS_SDR25         BIT(0)
 102 #define INTEL_DSM_HS_CAPS_DDR50         BIT(1)
 103 #define INTEL_DSM_HS_CAPS_SDR50         BIT(2)
 104 #define INTEL_DSM_HS_CAPS_SDR104        BIT(3)
 105
 106 enum {
 107         INTEL_DSM_FNS           =  0,
 108         INTEL_DSM_V18_SWITCH    =  3,
 109         INTEL_DSM_V33_SWITCH    =  4,
 110         INTEL_DSM_HS_CAPS       =  8,
 111 };
 112
 113 struct intel_host {
 114         u32     dsm_fns;
 115         u32     hs_caps;
 116 };
 117
 118 static const guid_t intel_dsm_guid =
 119         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
 120                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 121
 122 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 123                        unsigned int fn, u32 *result)
 124 {
 125         union acpi_object *obj;
 126         int err = 0;
 127
 128         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
 129         if (!obj)
 130                 return -EOPNOTSUPP;
 131
 132         if (obj->type == ACPI_TYPE_INTEGER) {
 133                 *result = obj->integer.value;
 134         } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
 135                 size_t len = min_t(size_t, obj->buffer.length, 4);
 136
 137                 *result = 0;
 138                 memcpy(result, obj->buffer.pointer, len);
 139         } else {
 140                 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
 141                         __func__, fn, obj->type, obj->buffer.length);
 142                 err = -EINVAL;
 143         }
 144
 145         ACPI_FREE(obj);
 146
 147         return err;
 148 }
 149
 150 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
 151                      unsigned int fn, u32 *result)
 152 {
 153         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
 154                 return -EOPNOTSUPP;
 155
 156         return __intel_dsm(intel_host, dev, fn, result);
 157 }
 158
 159 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
 160                            struct mmc_host *mmc)
 161 {
 162         int err;
 163
 164         intel_host->hs_caps = ~0;
 165
 166         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
 167         if (err) {
 168                 pr_debug("%s: DSM not supported, error %d\n",
 169                          mmc_hostname(mmc), err);
 170                 return;
 171         }
 172
 173         pr_debug("%s: DSM function mask %#x\n",
 174                  mmc_hostname(mmc), intel_host->dsm_fns);
 175
 176         intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
 177 }
 178
 179 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
 180                                              struct mmc_ios *ios)
 181 {
 182         struct device *dev = mmc_dev(mmc);
 183         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 184         struct intel_host *intel_host = sdhci_acpi_priv(c);
 185         unsigned int fn;
 186         u32 result = 0;
 187         int err;
 188
 189         err = sdhci_start_signal_voltage_switch(mmc, ios);
 190         if (err)
 191                 return err;
 192
 193         switch (ios->signal_voltage) {
 194         case MMC_SIGNAL_VOLTAGE_330:
 195                 fn = INTEL_DSM_V33_SWITCH;
 196                 break;
 197         case MMC_SIGNAL_VOLTAGE_180:
 198                 fn = INTEL_DSM_V18_SWITCH;
 199                 break;
 200         default:
 201                 return 0;
 202         }
 203
 204         err = intel_dsm(intel_host, dev, fn, &result);
 205         pr_debug("%s: %s DSM fn %u error %d result %u\n",
 206                  mmc_hostname(mmc), __func__, fn, err, result);
 207
 208         return 0;
 209 }
 210
 211 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
 212 {
 213         u8 reg;
 214
 215         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
 216         reg |= 0x10;
 217         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 218         /* For eMMC, minimum is 1us but give it 9us for good measure */
 219         udelay(9);
 220         reg &= ~0x10;
 221         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
 222         /* For eMMC, minimum is 200us but give it 300us for good measure */
 223         usleep_range(300, 1000);
 224 }
 225
 226 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
 227         .set_clock = sdhci_set_clock,
 228         .set_bus_width = sdhci_set_bus_width,
 229         .reset = sdhci_reset,
 230         .set_uhs_signaling = sdhci_set_uhs_signaling,
 231 };
 232
 233 static const struct sdhci_ops sdhci_acpi_ops_int = {
 234         .set_clock = sdhci_set_clock,
 235         .set_bus_width = sdhci_set_bus_width,
 236         .reset = sdhci_reset,
 237         .set_uhs_signaling = sdhci_set_uhs_signaling,
 238         .hw_reset   = sdhci_acpi_int_hw_reset,
 239 };
 240
 241 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
 242         .ops = &sdhci_acpi_ops_int,
 243 };
 244
 245 #ifdef CONFIG_X86
 246
 247 static bool sdhci_acpi_byt(void)
 248 {
 249         static const struct x86_cpu_id byt[] = {
 250                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT },
 251                 {}
 252         };
 253
 254         return x86_match_cpu(byt);
 255 }
 256
 257 static bool sdhci_acpi_cht(void)
 258 {
 259         static const struct x86_cpu_id cht[] = {
 260                 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
 261                 {}
 262         };
 263
 264         return x86_match_cpu(cht);
 265 }
 266
 267 #define BYT_IOSF_SCCEP                  0x63
 268 #define BYT_IOSF_OCP_NETCTRL0           0x1078
 269 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
 270
 271 static void sdhci_acpi_byt_setting(struct device *dev)
 272 {
 273         u32 val = 0;
 274
 275         if (!sdhci_acpi_byt())
 276                 return;
 277
 278         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
 279                           &val)) {
 280                 dev_err(dev, "%s read error\n", __func__);
 281                 return;
 282         }
 283
 284         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
 285                 return;
 286
 287         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
 288
 289         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
 290                            val)) {
 291                 dev_err(dev, "%s write error\n", __func__);
 292                 return;
 293         }
 294
 295         dev_dbg(dev, "%s completed\n", __func__);
 296 }
 297
 298 static bool sdhci_acpi_byt_defer(struct device *dev)
 299 {
 300         if (!sdhci_acpi_byt())
 301                 return false;
 302
 303         if (!iosf_mbi_available())
 304                 return true;
 305
 306         sdhci_acpi_byt_setting(dev);
 307
 308         return false;
 309 }
 310
 311 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
 312                                     unsigned int slot, unsigned int parent_slot)
 313 {
 314         struct pci_dev *dev, *parent, *from = NULL;
 315
 316         while (1) {
 317                 dev = pci_get_device(vendor, device, from);
 318                 pci_dev_put(from);
 319                 if (!dev)
 320                         break;
 321                 parent = pci_upstream_bridge(dev);
 322                 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
 323                     parent && PCI_SLOT(parent->devfn) == parent_slot &&
 324                     !pci_upstream_bridge(parent)) {
 325                         pci_dev_put(dev);
 326                         return true;
 327                 }
 328                 from = dev;
 329         }
 330
 331         return false;
 332 }
 333
 334 /*
 335  * GPDwin uses PCI wifi which conflicts with SDIO's use of
 336  * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
 337  * problematic, but since SDIO is only used for wifi, the presence of the PCI
 338  * wifi card in the expected slot with an ACPI companion node, is used to
 339  * indicate that acpi_device_fix_up_power() should be avoided.
 340  */
 341 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 342                                                    const char *uid)
 343 {
 344         return sdhci_acpi_cht() &&
 345                !strcmp(hid, "80860F14") &&
 346                !strcmp(uid, "2") &&
 347                sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
 348 }
 349
 350 #else
 351
 352 static inline void sdhci_acpi_byt_setting(struct device *dev)
 353 {
 354 }
 355
 356 static inline bool sdhci_acpi_byt_defer(struct device *dev)
 357 {
 358         return false;
 359 }
 360
 361 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid,
 362                                                    const char *uid)
 363 {
 364         return false;
 365 }
 366
 367 #endif
 368
 369 static int bxt_get_cd(struct mmc_host *mmc)
 370 {
 371         int gpio_cd = mmc_gpio_get_cd(mmc);
 372         struct sdhci_host *host = mmc_priv(mmc);
 373         unsigned long flags;
 374         int ret = 0;
 375
 376         if (!gpio_cd)
 377                 return 0;
 378
 379         spin_lock_irqsave(&host->lock, flags);
 380
 381         if (host->flags & SDHCI_DEVICE_DEAD)
 382                 goto out;
 383
 384         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 385 out:
 386         spin_unlock_irqrestore(&host->lock, flags);
 387
 388         return ret;
 389 }
 390
 391 static int intel_probe_slot(struct platform_device *pdev, const char *hid,
 392                             const char *uid)
 393 {
 394         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 395         struct intel_host *intel_host = sdhci_acpi_priv(c);
 396         struct sdhci_host *host = c->host;
 397
 398         if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
 399             sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
 400             sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
 401                 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
 402
 403         if (hid && !strcmp(hid, "80865ACA"))
 404                 host->mmc_host_ops.get_cd = bxt_get_cd;
 405
 406         intel_dsm_init(intel_host, &pdev->dev, host->mmc);
 407
 408         host->mmc_host_ops.start_signal_voltage_switch =
 409                                         intel_start_signal_voltage_switch;
 410
 411         return 0;
 412 }
 413
 414 static int intel_setup_host(struct platform_device *pdev)
 415 {
 416         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 417         struct intel_host *intel_host = sdhci_acpi_priv(c);
 418
 419         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
 420                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
 421
 422         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
 423                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
 424
 425         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
 426                 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
 427
 428         if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
 429                 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
 430
 431         return 0;
 432 }
 433
 434 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
 435         .chip    = &sdhci_acpi_chip_int,
 436         .caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
 437                    MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
 438                    MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
 439         .flags   = SDHCI_ACPI_RUNTIME_PM,
 440         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 441         .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
 442                    SDHCI_QUIRK2_STOP_WITH_TC |
 443                    SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
 444         .probe_slot     = intel_probe_slot,
 445         .setup_host     = intel_setup_host,
 446         .priv_size      = sizeof(struct intel_host),
 447 };
 448
 449 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
 450         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 451                    SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 452         .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
 453         .caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
 454                    MMC_CAP_WAIT_WHILE_BUSY,
 455         .flags   = SDHCI_ACPI_RUNTIME_PM,
 456         .pm_caps = MMC_PM_KEEP_POWER,
 457         .probe_slot     = intel_probe_slot,
 458         .setup_host     = intel_setup_host,
 459         .priv_size      = sizeof(struct intel_host),
 460 };
 461
 462 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
 463         .flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
 464                    SDHCI_ACPI_RUNTIME_PM,
 465         .quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 466         .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
 467                    SDHCI_QUIRK2_STOP_WITH_TC,
 468         .caps    = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
 469         .probe_slot     = intel_probe_slot,
 470         .setup_host     = intel_setup_host,
 471         .priv_size      = sizeof(struct intel_host),
 472 };
 473
 474 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG        0x1a8
 475 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG          0x1ac
 476 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
 477 {
 478         struct sdhci_host *host = ptr;
 479
 480         sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
 481         sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
 482
 483         return IRQ_HANDLED;
 484 }
 485
 486 static int qcom_probe_slot(struct platform_device *pdev, const char *hid,
 487                            const char *uid)
 488 {
 489         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 490         struct sdhci_host *host = c->host;
 491         int *irq = sdhci_acpi_priv(c);
 492
 493         *irq = -EINVAL;
 494
 495         if (strcmp(hid, "QCOM8051"))
 496                 return 0;
 497
 498         *irq = platform_get_irq(pdev, 1);
 499         if (*irq < 0)
 500                 return 0;
 501
 502         return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
 503                                     IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
 504                                     "sdhci_qcom", host);
 505 }
 506
 507 static int qcom_free_slot(struct platform_device *pdev)
 508 {
 509         struct device *dev = &pdev->dev;
 510         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 511         struct sdhci_host *host = c->host;
 512         struct acpi_device *adev;
 513         int *irq = sdhci_acpi_priv(c);
 514         const char *hid;
 515
 516         adev = ACPI_COMPANION(dev);
 517         if (!adev)
 518                 return -ENODEV;
 519
 520         hid = acpi_device_hid(adev);
 521         if (strcmp(hid, "QCOM8051"))
 522                 return 0;
 523
 524         if (*irq < 0)
 525                 return 0;
 526
 527         free_irq(*irq, host);
 528         return 0;
 529 }
 530
 531 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
 532         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 533         .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
 534         .caps    = MMC_CAP_NONREMOVABLE,
 535         .priv_size      = sizeof(int),
 536         .probe_slot     = qcom_probe_slot,
 537         .free_slot      = qcom_free_slot,
 538 };
 539
 540 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 541         .quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 542         .caps    = MMC_CAP_NONREMOVABLE,
 543 };
 544
 545 /* AMD sdhci reset dll register. */
 546 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
 547
 548 static int amd_select_drive_strength(struct mmc_card *card,
 549                                      unsigned int max_dtr, int host_drv,
 550                                      int card_drv, int *drv_type)
 551 {
 552         return MMC_SET_DRIVER_TYPE_A;
 553 }
 554
 555 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
 556 {
 557         /* AMD Platform requires dll setting */
 558         sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
 559         usleep_range(10, 20);
 560         sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
 561 }
 562
 563 /*
 564  * For AMD Platform it is required to disable the tuning
 565  * bit first controller to bring to HS Mode from HS200
 566  * mode, later enable to tune to HS400 mode.
 567  */
 568 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 569 {
 570         struct sdhci_host *host = mmc_priv(mmc);
 571         unsigned int old_timing = host->timing;
 572
 573         sdhci_set_ios(mmc, ios);
 574         if (old_timing == MMC_TIMING_MMC_HS200 &&
 575             ios->timing == MMC_TIMING_MMC_HS)
 576                 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
 577         if (old_timing != MMC_TIMING_MMC_HS400 &&
 578             ios->timing == MMC_TIMING_MMC_HS400) {
 579                 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
 580                 sdhci_acpi_amd_hs400_dll(host);
 581         }
 582 }
 583
 584 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 585         .set_clock      = sdhci_set_clock,
 586         .set_bus_width  = sdhci_set_bus_width,
 587         .reset          = sdhci_reset,
 588         .set_uhs_signaling = sdhci_set_uhs_signaling,
 589 };
 590
 591 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
 592         .ops = &sdhci_acpi_ops_amd,
 593 };
 594
 595 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
 596                                           const char *hid, const char *uid)
 597 {
 598         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 599         struct sdhci_host *host   = c->host;
 600
 601         sdhci_read_caps(host);
 602         if (host->caps1 & SDHCI_SUPPORT_DDR50)
 603                 host->mmc->caps = MMC_CAP_1_8V_DDR;
 604
 605         if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
 606             (host->mmc->caps & MMC_CAP_1_8V_DDR))
 607                 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
 608
 609         host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
 610         host->mmc_host_ops.set_ios = amd_set_ios;
 611         return 0;
 612 }
 613
 614 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
 615         .chip   = &sdhci_acpi_chip_amd,
 616         .caps   = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
 617         .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
 618                         SDHCI_QUIRK_32BIT_ADMA_SIZE,
 619         .probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
 620 };
 621
 622 struct sdhci_acpi_uid_slot {
 623         const char *hid;
 624         const char *uid;
 625         const struct sdhci_acpi_slot *slot;
 626 };
 627
 628 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
 629         { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
 630         { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
 631         { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
 632         { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
 633         { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
 634         { "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
 635         { "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
 636         { "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
 637         { "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
 638         { "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
 639         { "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
 640         { "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
 641         { "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
 642         { "PNP0D40"  },
 643         { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
 644         { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
 645         { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
 646         { },
 647 };
 648
 649 static const struct acpi_device_id sdhci_acpi_ids[] = {
 650         { "80865ACA" },
 651         { "80865ACC" },
 652         { "80865AD0" },
 653         { "80860F14" },
 654         { "80860F16" },
 655         { "INT33BB"  },
 656         { "INT33C6"  },
 657         { "INT3436"  },
 658         { "INT344D"  },
 659         { "PNP0D40"  },
 660         { "QCOM8051" },
 661         { "QCOM8052" },
 662         { "AMDI0040" },
 663         { },
 664 };
 665 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
 666
 667 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
 668                                                          const char *uid)
 669 {
 670         const struct sdhci_acpi_uid_slot *u;
 671
 672         for (u = sdhci_acpi_uids; u->hid; u++) {
 673                 if (strcmp(u->hid, hid))
 674                         continue;
 675                 if (!u->uid)
 676                         return u->slot;
 677                 if (uid && !strcmp(u->uid, uid))
 678                         return u->slot;
 679         }
 680         return NULL;
 681 }
 682
 683 static int sdhci_acpi_probe(struct platform_device *pdev)
 684 {
 685         struct device *dev = &pdev->dev;
 686         const struct sdhci_acpi_slot *slot;
 687         struct acpi_device *device, *child;
 688         struct sdhci_acpi_host *c;
 689         struct sdhci_host *host;
 690         struct resource *iomem;
 691         resource_size_t len;
 692         size_t priv_size;
 693         const char *hid;
 694         const char *uid;
 695         int err;
 696
 697         device = ACPI_COMPANION(dev);
 698         if (!device)
 699                 return -ENODEV;
 700
 701         hid = acpi_device_hid(device);
 702         uid = acpi_device_uid(device);
 703
 704         slot = sdhci_acpi_get_slot(hid, uid);
 705
 706         /* Power on the SDHCI controller and its children */
 707         acpi_device_fix_up_power(device);
 708         if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
 709                 list_for_each_entry(child, &device->children, node)
 710                         if (child->status.present && child->status.enabled)
 711                                 acpi_device_fix_up_power(child);
 712         }
 713
 714         if (sdhci_acpi_byt_defer(dev))
 715                 return -EPROBE_DEFER;
 716
 717         iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 718         if (!iomem)
 719                 return -ENOMEM;
 720
 721         len = resource_size(iomem);
 722         if (len < 0x100)
 723                 dev_err(dev, "Invalid iomem size!\n");
 724
 725         if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
 726                 return -ENOMEM;
 727
 728         priv_size = slot ? slot->priv_size : 0;
 729         host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
 730         if (IS_ERR(host))
 731                 return PTR_ERR(host);
 732
 733         c = sdhci_priv(host);
 734         c->host = host;
 735         c->slot = slot;
 736         c->pdev = pdev;
 737         c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
 738
 739         platform_set_drvdata(pdev, c);
 740
 741         host->hw_name   = "ACPI";
 742         host->ops       = &sdhci_acpi_ops_dflt;
 743         host->irq       = platform_get_irq(pdev, 0);
 744         if (host->irq < 0) {
 745                 err = -EINVAL;
 746                 goto err_free;
 747         }
 748
 749         host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
 750                                             resource_size(iomem));
 751         if (host->ioaddr == NULL) {
 752                 err = -ENOMEM;
 753                 goto err_free;
 754         }
 755
 756         if (c->slot) {
 757                 if (c->slot->probe_slot) {
 758                         err = c->slot->probe_slot(pdev, hid, uid);
 759                         if (err)
 760                                 goto err_free;
 761                 }
 762                 if (c->slot->chip) {
 763                         host->ops            = c->slot->chip->ops;
 764                         host->quirks        |= c->slot->chip->quirks;
 765                         host->quirks2       |= c->slot->chip->quirks2;
 766                         host->mmc->caps     |= c->slot->chip->caps;
 767                         host->mmc->caps2    |= c->slot->chip->caps2;
 768                         host->mmc->pm_caps  |= c->slot->chip->pm_caps;
 769                 }
 770                 host->quirks        |= c->slot->quirks;
 771                 host->quirks2       |= c->slot->quirks2;
 772                 host->mmc->caps     |= c->slot->caps;
 773                 host->mmc->caps2    |= c->slot->caps2;
 774                 host->mmc->pm_caps  |= c->slot->pm_caps;
 775         }
 776
 777         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
 778
 779         if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
 780                 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
 781
 782                 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
 783                 if (err) {
 784                         if (err == -EPROBE_DEFER)
 785                                 goto err_free;
 786                         dev_warn(dev, "failed to setup card detect gpio\n");
 787                         c->use_runtime_pm = false;
 788                 }
 789         }
 790
 791         err = sdhci_setup_host(host);
 792         if (err)
 793                 goto err_free;
 794
 795         if (c->slot && c->slot->setup_host) {
 796                 err = c->slot->setup_host(pdev);
 797                 if (err)
 798                         goto err_cleanup;
 799         }
 800
 801         err = __sdhci_add_host(host);
 802         if (err)
 803                 goto err_cleanup;
 804
 805         if (c->use_runtime_pm) {
 806                 pm_runtime_set_active(dev);
 807                 pm_suspend_ignore_children(dev, 1);
 808                 pm_runtime_set_autosuspend_delay(dev, 50);
 809                 pm_runtime_use_autosuspend(dev);
 810                 pm_runtime_enable(dev);
 811         }
 812
 813         device_enable_async_suspend(dev);
 814
 815         return 0;
 816
 817 err_cleanup:
 818         sdhci_cleanup_host(c->host);
 819 err_free:
 820         if (c->slot && c->slot->free_slot)
 821                 c->slot->free_slot(pdev);
 822
 823         sdhci_free_host(c->host);
 824         return err;
 825 }
 826
 827 static int sdhci_acpi_remove(struct platform_device *pdev)
 828 {
 829         struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
 830         struct device *dev = &pdev->dev;
 831         int dead;
 832
 833         if (c->use_runtime_pm) {
 834                 pm_runtime_get_sync(dev);
 835                 pm_runtime_disable(dev);
 836                 pm_runtime_put_noidle(dev);
 837         }
 838
 839         if (c->slot && c->slot->remove_slot)
 840                 c->slot->remove_slot(pdev);
 841
 842         dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
 843         sdhci_remove_host(c->host, dead);
 844
 845         if (c->slot && c->slot->free_slot)
 846                 c->slot->free_slot(pdev);
 847
 848         sdhci_free_host(c->host);
 849
 850         return 0;
 851 }
 852
 853 #ifdef CONFIG_PM_SLEEP
 854
 855 static int sdhci_acpi_suspend(struct device *dev)
 856 {
 857         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 858         struct sdhci_host *host = c->host;
 859
 860         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 861                 mmc_retune_needed(host->mmc);
 862
 863         return sdhci_suspend_host(host);
 864 }
 865
 866 static int sdhci_acpi_resume(struct device *dev)
 867 {
 868         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 869
 870         sdhci_acpi_byt_setting(&c->pdev->dev);
 871
 872         return sdhci_resume_host(c->host);
 873 }
 874
 875 #endif
 876
 877 #ifdef CONFIG_PM
 878
 879 static int sdhci_acpi_runtime_suspend(struct device *dev)
 880 {
 881         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 882         struct sdhci_host *host = c->host;
 883
 884         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
 885                 mmc_retune_needed(host->mmc);
 886
 887         return sdhci_runtime_suspend_host(host);
 888 }
 889
 890 static int sdhci_acpi_runtime_resume(struct device *dev)
 891 {
 892         struct sdhci_acpi_host *c = dev_get_drvdata(dev);
 893
 894         sdhci_acpi_byt_setting(&c->pdev->dev);
 895
 896         return sdhci_runtime_resume_host(c->host);
 897 }
 898
 899 #endif
 900
 901 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
 902         SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
 903         SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
 904                         sdhci_acpi_runtime_resume, NULL)
 905 };
 906
 907 static struct platform_driver sdhci_acpi_driver = {
 908         .driver = {
 909                 .name                   = "sdhci-acpi",
 910                 .acpi_match_table       = sdhci_acpi_ids,
 911                 .pm                     = &sdhci_acpi_pm_ops,
 912         },
 913         .probe  = sdhci_acpi_probe,
 914         .remove = sdhci_acpi_remove,
 915 };
 916
 917 module_platform_driver(sdhci_acpi_driver);
 918
 919 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
 920 MODULE_AUTHOR("Adrian Hunter");
 921 MODULE_LICENSE("GPL v2");