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/bitfield.h> 9 #include <linux/init.h> 10 #include <linux/export.h> 11 #include <linux/module.h> 12 #include <linux/device.h> 13 #include <linux/pinctrl/pinconf-generic.h> 14 #include <linux/platform_device.h> 15 #include <linux/ioport.h> 16 #include <linux/io.h> 17 #include <linux/dma-mapping.h> 18 #include <linux/compiler.h> 19 #include <linux/stddef.h> 20 #include <linux/bitops.h> 21 #include <linux/types.h> 22 #include <linux/err.h> 23 #include <linux/interrupt.h> 24 #include <linux/acpi.h> 25 #include <linux/pm.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/delay.h> 28 #include <linux/dmi.h> 29 30 #include <linux/mmc/host.h> 31 #include <linux/mmc/pm.h> 32 #include <linux/mmc/slot-gpio.h> 33 34 #ifdef CONFIG_X86 35 #include <linux/platform_data/x86/soc.h> 36 #include <asm/iosf_mbi.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[] ____cacheline_aligned; 79 }; 80 81 enum { 82 DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP = BIT(0), 83 DMI_QUIRK_SD_NO_WRITE_PROTECT = BIT(1), 84 DMI_QUIRK_SD_CD_ACTIVE_HIGH = BIT(2), 85 DMI_QUIRK_SD_CD_ENABLE_PULL_UP = BIT(3), 86 }; 87 88 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c) 89 { 90 return (void *)c->private; 91 } 92 93 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) 94 { 95 return c->slot && (c->slot->flags & flag); 96 } 97 98 #define INTEL_DSM_HS_CAPS_SDR25 BIT(0) 99 #define INTEL_DSM_HS_CAPS_DDR50 BIT(1) 100 #define INTEL_DSM_HS_CAPS_SDR50 BIT(2) 101 #define INTEL_DSM_HS_CAPS_SDR104 BIT(3) 102 103 enum { 104 INTEL_DSM_FNS = 0, 105 INTEL_DSM_V18_SWITCH = 3, 106 INTEL_DSM_V33_SWITCH = 4, 107 INTEL_DSM_HS_CAPS = 8, 108 }; 109 110 struct intel_host { 111 u32 dsm_fns; 112 u32 hs_caps; 113 }; 114 115 static const guid_t intel_dsm_guid = 116 GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F, 117 0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61); 118 119 static int __intel_dsm(struct intel_host *intel_host, struct device *dev, 120 unsigned int fn, u32 *result) 121 { 122 union acpi_object *obj; 123 int err = 0; 124 125 obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL); 126 if (!obj) 127 return -EOPNOTSUPP; 128 129 if (obj->type == ACPI_TYPE_INTEGER) { 130 *result = obj->integer.value; 131 } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) { 132 size_t len = min_t(size_t, obj->buffer.length, 4); 133 134 *result = 0; 135 memcpy(result, obj->buffer.pointer, len); 136 } else { 137 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n", 138 __func__, fn, obj->type, obj->buffer.length); 139 err = -EINVAL; 140 } 141 142 ACPI_FREE(obj); 143 144 return err; 145 } 146 147 static int intel_dsm(struct intel_host *intel_host, struct device *dev, 148 unsigned int fn, u32 *result) 149 { 150 if (fn > 31 || !(intel_host->dsm_fns & (1 << fn))) 151 return -EOPNOTSUPP; 152 153 return __intel_dsm(intel_host, dev, fn, result); 154 } 155 156 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev, 157 struct mmc_host *mmc) 158 { 159 int err; 160 161 intel_host->hs_caps = ~0; 162 163 err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns); 164 if (err) { 165 pr_debug("%s: DSM not supported, error %d\n", 166 mmc_hostname(mmc), err); 167 return; 168 } 169 170 pr_debug("%s: DSM function mask %#x\n", 171 mmc_hostname(mmc), intel_host->dsm_fns); 172 173 intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps); 174 } 175 176 static int intel_start_signal_voltage_switch(struct mmc_host *mmc, 177 struct mmc_ios *ios) 178 { 179 struct device *dev = mmc_dev(mmc); 180 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 181 struct intel_host *intel_host = sdhci_acpi_priv(c); 182 unsigned int fn; 183 u32 result = 0; 184 int err; 185 186 err = sdhci_start_signal_voltage_switch(mmc, ios); 187 if (err) 188 return err; 189 190 switch (ios->signal_voltage) { 191 case MMC_SIGNAL_VOLTAGE_330: 192 fn = INTEL_DSM_V33_SWITCH; 193 break; 194 case MMC_SIGNAL_VOLTAGE_180: 195 fn = INTEL_DSM_V18_SWITCH; 196 break; 197 default: 198 return 0; 199 } 200 201 err = intel_dsm(intel_host, dev, fn, &result); 202 pr_debug("%s: %s DSM fn %u error %d result %u\n", 203 mmc_hostname(mmc), __func__, fn, err, result); 204 205 return 0; 206 } 207 208 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host) 209 { 210 u8 reg; 211 212 reg = sdhci_readb(host, SDHCI_POWER_CONTROL); 213 reg |= 0x10; 214 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); 215 /* For eMMC, minimum is 1us but give it 9us for good measure */ 216 udelay(9); 217 reg &= ~0x10; 218 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); 219 /* For eMMC, minimum is 200us but give it 300us for good measure */ 220 usleep_range(300, 1000); 221 } 222 223 static const struct sdhci_ops sdhci_acpi_ops_dflt = { 224 .set_clock = sdhci_set_clock, 225 .set_bus_width = sdhci_set_bus_width, 226 .reset = sdhci_reset, 227 .set_uhs_signaling = sdhci_set_uhs_signaling, 228 }; 229 230 static const struct sdhci_ops sdhci_acpi_ops_int = { 231 .set_clock = sdhci_set_clock, 232 .set_bus_width = sdhci_set_bus_width, 233 .reset = sdhci_reset, 234 .set_uhs_signaling = sdhci_set_uhs_signaling, 235 .hw_reset = sdhci_acpi_int_hw_reset, 236 }; 237 238 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = { 239 .ops = &sdhci_acpi_ops_int, 240 }; 241 242 #ifdef CONFIG_X86 243 244 #define BYT_IOSF_SCCEP 0x63 245 #define BYT_IOSF_OCP_NETCTRL0 0x1078 246 #define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8) 247 248 static void sdhci_acpi_byt_setting(struct device *dev) 249 { 250 u32 val = 0; 251 252 if (!soc_intel_is_byt()) 253 return; 254 255 if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0, 256 &val)) { 257 dev_err(dev, "%s read error\n", __func__); 258 return; 259 } 260 261 if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE)) 262 return; 263 264 val &= ~BYT_IOSF_OCP_TIMEOUT_BASE; 265 266 if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0, 267 val)) { 268 dev_err(dev, "%s write error\n", __func__); 269 return; 270 } 271 272 dev_dbg(dev, "%s completed\n", __func__); 273 } 274 275 static bool sdhci_acpi_byt_defer(struct device *dev) 276 { 277 if (!soc_intel_is_byt()) 278 return false; 279 280 if (!iosf_mbi_available()) 281 return true; 282 283 sdhci_acpi_byt_setting(dev); 284 285 return false; 286 } 287 288 #else 289 290 static inline void sdhci_acpi_byt_setting(struct device *dev) 291 { 292 } 293 294 static inline bool sdhci_acpi_byt_defer(struct device *dev) 295 { 296 return false; 297 } 298 299 #endif 300 301 static int bxt_get_cd(struct mmc_host *mmc) 302 { 303 int gpio_cd = mmc_gpio_get_cd(mmc); 304 305 if (!gpio_cd) 306 return 0; 307 308 return sdhci_get_cd_nogpio(mmc); 309 } 310 311 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev) 312 { 313 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 314 struct intel_host *intel_host = sdhci_acpi_priv(c); 315 struct sdhci_host *host = c->host; 316 317 if (acpi_dev_hid_uid_match(adev, "80860F14", "1") && 318 sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 && 319 sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807) 320 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ 321 322 if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL)) 323 host->mmc_host_ops.get_cd = bxt_get_cd; 324 325 intel_dsm_init(intel_host, &pdev->dev, host->mmc); 326 327 host->mmc_host_ops.start_signal_voltage_switch = 328 intel_start_signal_voltage_switch; 329 330 c->is_intel = true; 331 332 return 0; 333 } 334 335 static int intel_setup_host(struct platform_device *pdev) 336 { 337 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 338 struct intel_host *intel_host = sdhci_acpi_priv(c); 339 340 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25)) 341 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25; 342 343 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50)) 344 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50; 345 346 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50)) 347 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50; 348 349 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104)) 350 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104; 351 352 return 0; 353 } 354 355 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { 356 .chip = &sdhci_acpi_chip_int, 357 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | 358 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | 359 MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY, 360 .flags = SDHCI_ACPI_RUNTIME_PM, 361 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | 362 SDHCI_QUIRK_NO_LED, 363 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 364 SDHCI_QUIRK2_STOP_WITH_TC | 365 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400, 366 .probe_slot = intel_probe_slot, 367 .setup_host = intel_setup_host, 368 .priv_size = sizeof(struct intel_host), 369 }; 370 371 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = { 372 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 373 SDHCI_QUIRK_NO_LED | 374 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, 375 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON, 376 .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD | 377 MMC_CAP_WAIT_WHILE_BUSY, 378 .flags = SDHCI_ACPI_RUNTIME_PM, 379 .pm_caps = MMC_PM_KEEP_POWER, 380 .probe_slot = intel_probe_slot, 381 .setup_host = intel_setup_host, 382 .priv_size = sizeof(struct intel_host), 383 }; 384 385 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = { 386 .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL | 387 SDHCI_ACPI_RUNTIME_PM, 388 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | 389 SDHCI_QUIRK_NO_LED, 390 .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON | 391 SDHCI_QUIRK2_STOP_WITH_TC, 392 .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM, 393 .probe_slot = intel_probe_slot, 394 .setup_host = intel_setup_host, 395 .priv_size = sizeof(struct intel_host), 396 }; 397 398 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG 0x1a8 399 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG 0x1ac 400 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr) 401 { 402 struct sdhci_host *host = ptr; 403 404 sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG); 405 sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG); 406 407 return IRQ_HANDLED; 408 } 409 410 static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev) 411 { 412 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 413 struct sdhci_host *host = c->host; 414 int *irq = sdhci_acpi_priv(c); 415 416 *irq = -EINVAL; 417 418 if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL)) 419 return 0; 420 421 *irq = platform_get_irq(pdev, 1); 422 if (*irq < 0) 423 return 0; 424 425 return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler, 426 IRQF_ONESHOT | IRQF_TRIGGER_HIGH, 427 "sdhci_qcom", host); 428 } 429 430 static int qcom_free_slot(struct platform_device *pdev) 431 { 432 struct device *dev = &pdev->dev; 433 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 434 struct sdhci_host *host = c->host; 435 struct acpi_device *adev; 436 int *irq = sdhci_acpi_priv(c); 437 438 adev = ACPI_COMPANION(dev); 439 if (!adev) 440 return -ENODEV; 441 442 if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL)) 443 return 0; 444 445 if (*irq < 0) 446 return 0; 447 448 free_irq(*irq, host); 449 return 0; 450 } 451 452 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = { 453 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, 454 .quirks2 = SDHCI_QUIRK2_NO_1_8_V, 455 .caps = MMC_CAP_NONREMOVABLE, 456 .priv_size = sizeof(int), 457 .probe_slot = qcom_probe_slot, 458 .free_slot = qcom_free_slot, 459 }; 460 461 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = { 462 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, 463 .caps = MMC_CAP_NONREMOVABLE, 464 }; 465 466 struct amd_sdhci_host { 467 bool tuned_clock; 468 bool dll_enabled; 469 }; 470 471 /* AMD sdhci reset dll register. */ 472 #define SDHCI_AMD_RESET_DLL_REGISTER 0x908 473 474 static int amd_select_drive_strength(struct mmc_card *card, 475 unsigned int max_dtr, int host_drv, 476 int card_drv, int *host_driver_strength) 477 { 478 struct sdhci_host *host = mmc_priv(card->host); 479 u16 preset, preset_driver_strength; 480 481 /* 482 * This method is only called by mmc_select_hs200 so we only need to 483 * read from the HS200 (SDR104) preset register. 484 * 485 * Firmware that has "invalid/default" presets return a driver strength 486 * of A. This matches the previously hard coded value. 487 */ 488 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104); 489 preset_driver_strength = FIELD_GET(SDHCI_PRESET_DRV_MASK, preset); 490 491 /* 492 * We want the controller driver strength to match the card's driver 493 * strength so they have similar rise/fall times. 494 * 495 * The controller driver strength set by this method is sticky for all 496 * timings after this method is called. This unfortunately means that 497 * while HS400 tuning is in progress we end up with mismatched driver 498 * strengths between the controller and the card. HS400 tuning requires 499 * switching from HS400->DDR52->HS->HS200->HS400. So the driver mismatch 500 * happens while in DDR52 and HS modes. This has not been observed to 501 * cause problems. Enabling presets would fix this issue. 502 */ 503 *host_driver_strength = preset_driver_strength; 504 505 /* 506 * The resulting card driver strength is only set when switching the 507 * card's timing to HS200 or HS400. The card will use the default driver 508 * strength (B) for any other mode. 509 */ 510 return preset_driver_strength; 511 } 512 513 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host, bool enable) 514 { 515 struct sdhci_acpi_host *acpi_host = sdhci_priv(host); 516 struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host); 517 518 /* AMD Platform requires dll setting */ 519 sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER); 520 usleep_range(10, 20); 521 if (enable) 522 sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER); 523 524 amd_host->dll_enabled = enable; 525 } 526 527 /* 528 * The initialization sequence for HS400 is: 529 * HS->HS200->Perform Tuning->HS->HS400 530 * 531 * The re-tuning sequence is: 532 * HS400->DDR52->HS->HS200->Perform Tuning->HS->HS400 533 * 534 * The AMD eMMC Controller can only use the tuned clock while in HS200 and HS400 535 * mode. If we switch to a different mode, we need to disable the tuned clock. 536 * If we have previously performed tuning and switch back to HS200 or 537 * HS400, we can re-enable the tuned clock. 538 * 539 */ 540 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 541 { 542 struct sdhci_host *host = mmc_priv(mmc); 543 struct sdhci_acpi_host *acpi_host = sdhci_priv(host); 544 struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host); 545 unsigned int old_timing = host->timing; 546 u16 val; 547 548 sdhci_set_ios(mmc, ios); 549 550 if (old_timing != host->timing && amd_host->tuned_clock) { 551 if (host->timing == MMC_TIMING_MMC_HS400 || 552 host->timing == MMC_TIMING_MMC_HS200) { 553 val = sdhci_readw(host, SDHCI_HOST_CONTROL2); 554 val |= SDHCI_CTRL_TUNED_CLK; 555 sdhci_writew(host, val, SDHCI_HOST_CONTROL2); 556 } else { 557 val = sdhci_readw(host, SDHCI_HOST_CONTROL2); 558 val &= ~SDHCI_CTRL_TUNED_CLK; 559 sdhci_writew(host, val, SDHCI_HOST_CONTROL2); 560 } 561 562 /* DLL is only required for HS400 */ 563 if (host->timing == MMC_TIMING_MMC_HS400 && 564 !amd_host->dll_enabled) 565 sdhci_acpi_amd_hs400_dll(host, true); 566 } 567 } 568 569 static int amd_sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) 570 { 571 int err; 572 struct sdhci_host *host = mmc_priv(mmc); 573 struct sdhci_acpi_host *acpi_host = sdhci_priv(host); 574 struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host); 575 576 amd_host->tuned_clock = false; 577 578 err = sdhci_execute_tuning(mmc, opcode); 579 580 if (!err && !host->tuning_err) 581 amd_host->tuned_clock = true; 582 583 return err; 584 } 585 586 static void amd_sdhci_reset(struct sdhci_host *host, u8 mask) 587 { 588 struct sdhci_acpi_host *acpi_host = sdhci_priv(host); 589 struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host); 590 591 if (mask & SDHCI_RESET_ALL) { 592 amd_host->tuned_clock = false; 593 sdhci_acpi_amd_hs400_dll(host, false); 594 } 595 596 sdhci_reset(host, mask); 597 } 598 599 static const struct sdhci_ops sdhci_acpi_ops_amd = { 600 .set_clock = sdhci_set_clock, 601 .set_bus_width = sdhci_set_bus_width, 602 .reset = amd_sdhci_reset, 603 .set_uhs_signaling = sdhci_set_uhs_signaling, 604 }; 605 606 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = { 607 .ops = &sdhci_acpi_ops_amd, 608 }; 609 610 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev, 611 struct acpi_device *adev) 612 { 613 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 614 struct sdhci_host *host = c->host; 615 616 sdhci_read_caps(host); 617 if (host->caps1 & SDHCI_SUPPORT_DDR50) 618 host->mmc->caps = MMC_CAP_1_8V_DDR; 619 620 if ((host->caps1 & SDHCI_SUPPORT_SDR104) && 621 (host->mmc->caps & MMC_CAP_1_8V_DDR)) 622 host->mmc->caps2 = MMC_CAP2_HS400_1_8V; 623 624 /* 625 * There are two types of presets out in the wild: 626 * 1) Default/broken presets. 627 * These presets have two sets of problems: 628 * a) The clock divisor for SDR12, SDR25, and SDR50 is too small. 629 * This results in clock frequencies that are 2x higher than 630 * acceptable. i.e., SDR12 = 25 MHz, SDR25 = 50 MHz, SDR50 = 631 * 100 MHz.x 632 * b) The HS200 and HS400 driver strengths don't match. 633 * By default, the SDR104 preset register has a driver strength of 634 * A, but the (internal) HS400 preset register has a driver 635 * strength of B. As part of initializing HS400, HS200 tuning 636 * needs to be performed. Having different driver strengths 637 * between tuning and operation is wrong. It results in different 638 * rise/fall times that lead to incorrect sampling. 639 * 2) Firmware with properly initialized presets. 640 * These presets have proper clock divisors. i.e., SDR12 => 12MHz, 641 * SDR25 => 25 MHz, SDR50 => 50 MHz. Additionally the HS200 and 642 * HS400 preset driver strengths match. 643 * 644 * Enabling presets for HS400 doesn't work for the following reasons: 645 * 1) sdhci_set_ios has a hard coded list of timings that are used 646 * to determine if presets should be enabled. 647 * 2) sdhci_get_preset_value is using a non-standard register to 648 * read out HS400 presets. The AMD controller doesn't support this 649 * non-standard register. In fact, it doesn't expose the HS400 650 * preset register anywhere in the SDHCI memory map. This results 651 * in reading a garbage value and using the wrong presets. 652 * 653 * Since HS400 and HS200 presets must be identical, we could 654 * instead use the SDR104 preset register. 655 * 656 * If the above issues are resolved we could remove this quirk for 657 * firmware that has valid presets (i.e., SDR12 <= 12 MHz). 658 */ 659 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; 660 661 host->mmc_host_ops.select_drive_strength = amd_select_drive_strength; 662 host->mmc_host_ops.set_ios = amd_set_ios; 663 host->mmc_host_ops.execute_tuning = amd_sdhci_execute_tuning; 664 return 0; 665 } 666 667 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = { 668 .chip = &sdhci_acpi_chip_amd, 669 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE, 670 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | 671 SDHCI_QUIRK_32BIT_DMA_SIZE | 672 SDHCI_QUIRK_32BIT_ADMA_SIZE, 673 .quirks2 = SDHCI_QUIRK2_BROKEN_64_BIT_DMA, 674 .probe_slot = sdhci_acpi_emmc_amd_probe_slot, 675 .priv_size = sizeof(struct amd_sdhci_host), 676 }; 677 678 struct sdhci_acpi_uid_slot { 679 const char *hid; 680 const char *uid; 681 const struct sdhci_acpi_slot *slot; 682 }; 683 684 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = { 685 { "80865ACA", NULL, &sdhci_acpi_slot_int_sd }, 686 { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc }, 687 { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio }, 688 { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc }, 689 { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio }, 690 { "80860F14" , "3" , &sdhci_acpi_slot_int_sd }, 691 { "80860F16" , NULL, &sdhci_acpi_slot_int_sd }, 692 { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio }, 693 { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd }, 694 { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio }, 695 { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio }, 696 { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio }, 697 { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd }, 698 { "PNP0D40" }, 699 { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v }, 700 { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd }, 701 { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc }, 702 { "AMDI0041", NULL, &sdhci_acpi_slot_amd_emmc }, 703 { }, 704 }; 705 706 static const struct acpi_device_id sdhci_acpi_ids[] = { 707 { "80865ACA" }, 708 { "80865ACC" }, 709 { "80865AD0" }, 710 { "80860F14" }, 711 { "80860F16" }, 712 { "INT33BB" }, 713 { "INT33C6" }, 714 { "INT3436" }, 715 { "INT344D" }, 716 { "PNP0D40" }, 717 { "QCOM8051" }, 718 { "QCOM8052" }, 719 { "AMDI0040" }, 720 { "AMDI0041" }, 721 { }, 722 }; 723 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids); 724 725 /* Please keep this list sorted alphabetically */ 726 static const struct dmi_system_id sdhci_acpi_quirks[] = { 727 { 728 /* 729 * The Acer Aspire Switch 10 (SW5-012) microSD slot always 730 * reports the card being write-protected even though microSD 731 * cards do not have a write-protect switch at all. 732 */ 733 .matches = { 734 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 735 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"), 736 }, 737 .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT, 738 }, 739 { 740 /* Asus T100TA, needs pull-up for cd but DSDT GpioInt has NoPull set */ 741 .matches = { 742 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 743 DMI_MATCH(DMI_PRODUCT_NAME, "T100TA"), 744 }, 745 .driver_data = (void *)DMI_QUIRK_SD_CD_ENABLE_PULL_UP, 746 }, 747 { 748 /* 749 * The Lenovo Miix 320-10ICR has a bug in the _PS0 method of 750 * the SHC1 ACPI device, this bug causes it to reprogram the 751 * wrong LDO (DLDO3) to 1.8V if 1.8V modes are used and the 752 * card is (runtime) suspended + resumed. DLDO3 is used for 753 * the LCD and setting it to 1.8V causes the LCD to go black. 754 */ 755 .matches = { 756 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 757 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), 758 }, 759 .driver_data = (void *)DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP, 760 }, 761 { 762 /* 763 * Lenovo Yoga Tablet 2 Pro 1380F/L (13" Android version) this 764 * has broken WP reporting and an inverted CD signal. 765 * Note this has more or less the same BIOS as the Lenovo Yoga 766 * Tablet 2 830F/L or 1050F/L (8" and 10" Android), but unlike 767 * the 830 / 1050 models which share the same mainboard this 768 * model has a different mainboard and the inverted CD and 769 * broken WP are unique to this board. 770 */ 771 .matches = { 772 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 773 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 774 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 775 /* Full match so as to NOT match the 830/1050 BIOS */ 776 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21.X64.0005.R00.1504101516"), 777 }, 778 .driver_data = (void *)(DMI_QUIRK_SD_NO_WRITE_PROTECT | 779 DMI_QUIRK_SD_CD_ACTIVE_HIGH), 780 }, 781 { 782 /* 783 * The Toshiba WT8-B's microSD slot always reports the card being 784 * write-protected. 785 */ 786 .matches = { 787 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 788 DMI_MATCH(DMI_PRODUCT_NAME, "TOSHIBA ENCORE 2 WT8-B"), 789 }, 790 .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT, 791 }, 792 { 793 /* 794 * The Toshiba WT10-A's microSD slot always reports the card being 795 * write-protected. 796 */ 797 .matches = { 798 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 799 DMI_MATCH(DMI_PRODUCT_NAME, "TOSHIBA WT10-A"), 800 }, 801 .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT, 802 }, 803 {} /* Terminating entry */ 804 }; 805 806 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev) 807 { 808 const struct sdhci_acpi_uid_slot *u; 809 810 for (u = sdhci_acpi_uids; u->hid; u++) { 811 if (acpi_dev_hid_uid_match(adev, u->hid, u->uid)) 812 return u->slot; 813 } 814 return NULL; 815 } 816 817 static int sdhci_acpi_probe(struct platform_device *pdev) 818 { 819 struct device *dev = &pdev->dev; 820 const struct sdhci_acpi_slot *slot; 821 const struct dmi_system_id *id; 822 struct acpi_device *device; 823 struct sdhci_acpi_host *c; 824 struct sdhci_host *host; 825 struct resource *iomem; 826 resource_size_t len; 827 size_t priv_size; 828 int quirks = 0; 829 int err; 830 831 device = ACPI_COMPANION(dev); 832 if (!device) 833 return -ENODEV; 834 835 id = dmi_first_match(sdhci_acpi_quirks); 836 if (id) 837 quirks = (long)id->driver_data; 838 839 slot = sdhci_acpi_get_slot(device); 840 841 /* Power on the SDHCI controller and its children */ 842 acpi_device_fix_up_power_extended(device); 843 844 if (sdhci_acpi_byt_defer(dev)) 845 return -EPROBE_DEFER; 846 847 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 848 if (!iomem) 849 return -ENOMEM; 850 851 len = resource_size(iomem); 852 if (len < 0x100) 853 dev_err(dev, "Invalid iomem size!\n"); 854 855 if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev))) 856 return -ENOMEM; 857 858 priv_size = slot ? slot->priv_size : 0; 859 host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size); 860 if (IS_ERR(host)) 861 return PTR_ERR(host); 862 863 c = sdhci_priv(host); 864 c->host = host; 865 c->slot = slot; 866 c->pdev = pdev; 867 c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM); 868 869 platform_set_drvdata(pdev, c); 870 871 host->hw_name = "ACPI"; 872 host->ops = &sdhci_acpi_ops_dflt; 873 host->irq = platform_get_irq(pdev, 0); 874 if (host->irq < 0) { 875 err = host->irq; 876 goto err_free; 877 } 878 879 host->ioaddr = devm_ioremap(dev, iomem->start, 880 resource_size(iomem)); 881 if (host->ioaddr == NULL) { 882 err = -ENOMEM; 883 goto err_free; 884 } 885 886 if (c->slot) { 887 if (c->slot->probe_slot) { 888 err = c->slot->probe_slot(pdev, device); 889 if (err) 890 goto err_free; 891 } 892 if (c->slot->chip) { 893 host->ops = c->slot->chip->ops; 894 host->quirks |= c->slot->chip->quirks; 895 host->quirks2 |= c->slot->chip->quirks2; 896 host->mmc->caps |= c->slot->chip->caps; 897 host->mmc->caps2 |= c->slot->chip->caps2; 898 host->mmc->pm_caps |= c->slot->chip->pm_caps; 899 } 900 host->quirks |= c->slot->quirks; 901 host->quirks2 |= c->slot->quirks2; 902 host->mmc->caps |= c->slot->caps; 903 host->mmc->caps2 |= c->slot->caps2; 904 host->mmc->pm_caps |= c->slot->pm_caps; 905 } 906 907 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP; 908 909 if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) { 910 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL); 911 912 if (quirks & DMI_QUIRK_SD_CD_ACTIVE_HIGH) 913 host->mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH; 914 915 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0); 916 if (err) { 917 if (err == -EPROBE_DEFER) 918 goto err_free; 919 dev_warn(dev, "failed to setup card detect gpio\n"); 920 c->use_runtime_pm = false; 921 } else if (quirks & DMI_QUIRK_SD_CD_ENABLE_PULL_UP) { 922 mmc_gpiod_set_cd_config(host->mmc, 923 PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 20000)); 924 } 925 926 if (quirks & DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP) 927 c->reset_signal_volt_on_suspend = true; 928 929 if (quirks & DMI_QUIRK_SD_NO_WRITE_PROTECT) 930 host->mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; 931 } 932 933 err = sdhci_setup_host(host); 934 if (err) 935 goto err_free; 936 937 if (c->slot && c->slot->setup_host) { 938 err = c->slot->setup_host(pdev); 939 if (err) 940 goto err_cleanup; 941 } 942 943 err = __sdhci_add_host(host); 944 if (err) 945 goto err_cleanup; 946 947 if (c->use_runtime_pm) { 948 pm_runtime_set_active(dev); 949 pm_suspend_ignore_children(dev, 1); 950 pm_runtime_set_autosuspend_delay(dev, 50); 951 pm_runtime_use_autosuspend(dev); 952 pm_runtime_enable(dev); 953 } 954 955 device_enable_async_suspend(dev); 956 957 return 0; 958 959 err_cleanup: 960 sdhci_cleanup_host(c->host); 961 err_free: 962 if (c->slot && c->slot->free_slot) 963 c->slot->free_slot(pdev); 964 965 sdhci_free_host(c->host); 966 return err; 967 } 968 969 static void sdhci_acpi_remove(struct platform_device *pdev) 970 { 971 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 972 struct device *dev = &pdev->dev; 973 int dead; 974 975 if (c->use_runtime_pm) { 976 pm_runtime_get_sync(dev); 977 pm_runtime_disable(dev); 978 pm_runtime_put_noidle(dev); 979 } 980 981 if (c->slot && c->slot->remove_slot) 982 c->slot->remove_slot(pdev); 983 984 dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0); 985 sdhci_remove_host(c->host, dead); 986 987 if (c->slot && c->slot->free_slot) 988 c->slot->free_slot(pdev); 989 990 sdhci_free_host(c->host); 991 } 992 993 static void __maybe_unused sdhci_acpi_reset_signal_voltage_if_needed( 994 struct device *dev) 995 { 996 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 997 struct sdhci_host *host = c->host; 998 999 if (c->is_intel && c->reset_signal_volt_on_suspend && 1000 host->mmc->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_330) { 1001 struct intel_host *intel_host = sdhci_acpi_priv(c); 1002 unsigned int fn = INTEL_DSM_V33_SWITCH; 1003 u32 result = 0; 1004 1005 intel_dsm(intel_host, dev, fn, &result); 1006 } 1007 } 1008 1009 #ifdef CONFIG_PM_SLEEP 1010 1011 static int sdhci_acpi_suspend(struct device *dev) 1012 { 1013 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 1014 struct sdhci_host *host = c->host; 1015 int ret; 1016 1017 if (host->tuning_mode != SDHCI_TUNING_MODE_3) 1018 mmc_retune_needed(host->mmc); 1019 1020 ret = sdhci_suspend_host(host); 1021 if (ret) 1022 return ret; 1023 1024 sdhci_acpi_reset_signal_voltage_if_needed(dev); 1025 return 0; 1026 } 1027 1028 static int sdhci_acpi_resume(struct device *dev) 1029 { 1030 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 1031 1032 sdhci_acpi_byt_setting(&c->pdev->dev); 1033 1034 return sdhci_resume_host(c->host); 1035 } 1036 1037 #endif 1038 1039 #ifdef CONFIG_PM 1040 1041 static int sdhci_acpi_runtime_suspend(struct device *dev) 1042 { 1043 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 1044 struct sdhci_host *host = c->host; 1045 int ret; 1046 1047 if (host->tuning_mode != SDHCI_TUNING_MODE_3) 1048 mmc_retune_needed(host->mmc); 1049 1050 ret = sdhci_runtime_suspend_host(host); 1051 if (ret) 1052 return ret; 1053 1054 sdhci_acpi_reset_signal_voltage_if_needed(dev); 1055 return 0; 1056 } 1057 1058 static int sdhci_acpi_runtime_resume(struct device *dev) 1059 { 1060 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 1061 1062 sdhci_acpi_byt_setting(&c->pdev->dev); 1063 1064 return sdhci_runtime_resume_host(c->host, 0); 1065 } 1066 1067 #endif 1068 1069 static const struct dev_pm_ops sdhci_acpi_pm_ops = { 1070 SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume) 1071 SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend, 1072 sdhci_acpi_runtime_resume, NULL) 1073 }; 1074 1075 static struct platform_driver sdhci_acpi_driver = { 1076 .driver = { 1077 .name = "sdhci-acpi", 1078 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1079 .acpi_match_table = sdhci_acpi_ids, 1080 .pm = &sdhci_acpi_pm_ops, 1081 }, 1082 .probe = sdhci_acpi_probe, 1083 .remove_new = sdhci_acpi_remove, 1084 }; 1085 1086 module_platform_driver(sdhci_acpi_driver); 1087 1088 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver"); 1089 MODULE_AUTHOR("Adrian Hunter"); 1090 MODULE_LICENSE("GPL v2"); 1091