1 /* 2 * Secure Digital Host Controller Interface ACPI driver. 3 * 4 * Copyright (c) 2012, Intel Corporation. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 */ 20 21 #include <linux/init.h> 22 #include <linux/export.h> 23 #include <linux/module.h> 24 #include <linux/device.h> 25 #include <linux/platform_device.h> 26 #include <linux/ioport.h> 27 #include <linux/io.h> 28 #include <linux/dma-mapping.h> 29 #include <linux/compiler.h> 30 #include <linux/stddef.h> 31 #include <linux/bitops.h> 32 #include <linux/types.h> 33 #include <linux/err.h> 34 #include <linux/interrupt.h> 35 #include <linux/acpi.h> 36 #include <linux/pm.h> 37 #include <linux/pm_runtime.h> 38 #include <linux/delay.h> 39 40 #include <linux/mmc/host.h> 41 #include <linux/mmc/pm.h> 42 #include <linux/mmc/slot-gpio.h> 43 44 #ifdef CONFIG_X86 45 #include <asm/cpu_device_id.h> 46 #include <asm/intel-family.h> 47 #include <asm/iosf_mbi.h> 48 #include <linux/pci.h> 49 #endif 50 51 #include "sdhci.h" 52 53 enum { 54 SDHCI_ACPI_SD_CD = BIT(0), 55 SDHCI_ACPI_RUNTIME_PM = BIT(1), 56 SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2), 57 }; 58 59 struct sdhci_acpi_chip { 60 const struct sdhci_ops *ops; 61 unsigned int quirks; 62 unsigned int quirks2; 63 unsigned long caps; 64 unsigned int caps2; 65 mmc_pm_flag_t pm_caps; 66 }; 67 68 struct sdhci_acpi_slot { 69 const struct sdhci_acpi_chip *chip; 70 unsigned int quirks; 71 unsigned int quirks2; 72 unsigned long caps; 73 unsigned int caps2; 74 mmc_pm_flag_t pm_caps; 75 unsigned int flags; 76 size_t priv_size; 77 int (*probe_slot)(struct platform_device *, const char *, const char *); 78 int (*remove_slot)(struct platform_device *); 79 int (*setup_host)(struct platform_device *pdev); 80 }; 81 82 struct sdhci_acpi_host { 83 struct sdhci_host *host; 84 const struct sdhci_acpi_slot *slot; 85 struct platform_device *pdev; 86 bool use_runtime_pm; 87 unsigned long private[0] ____cacheline_aligned; 88 }; 89 90 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c) 91 { 92 return (void *)c->private; 93 } 94 95 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) 96 { 97 return c->slot && (c->slot->flags & flag); 98 } 99 100 #define INTEL_DSM_HS_CAPS_SDR25 BIT(0) 101 #define INTEL_DSM_HS_CAPS_DDR50 BIT(1) 102 #define INTEL_DSM_HS_CAPS_SDR50 BIT(2) 103 #define INTEL_DSM_HS_CAPS_SDR104 BIT(3) 104 105 enum { 106 INTEL_DSM_FNS = 0, 107 INTEL_DSM_V18_SWITCH = 3, 108 INTEL_DSM_V33_SWITCH = 4, 109 INTEL_DSM_HS_CAPS = 8, 110 }; 111 112 struct intel_host { 113 u32 dsm_fns; 114 u32 hs_caps; 115 }; 116 117 static const guid_t intel_dsm_guid = 118 GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F, 119 0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61); 120 121 static int __intel_dsm(struct intel_host *intel_host, struct device *dev, 122 unsigned int fn, u32 *result) 123 { 124 union acpi_object *obj; 125 int err = 0; 126 127 obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL); 128 if (!obj) 129 return -EOPNOTSUPP; 130 131 if (obj->type == ACPI_TYPE_INTEGER) { 132 *result = obj->integer.value; 133 } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) { 134 size_t len = min_t(size_t, obj->buffer.length, 4); 135 136 *result = 0; 137 memcpy(result, obj->buffer.pointer, len); 138 } else { 139 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n", 140 __func__, fn, obj->type, obj->buffer.length); 141 err = -EINVAL; 142 } 143 144 ACPI_FREE(obj); 145 146 return err; 147 } 148 149 static int intel_dsm(struct intel_host *intel_host, struct device *dev, 150 unsigned int fn, u32 *result) 151 { 152 if (fn > 31 || !(intel_host->dsm_fns & (1 << fn))) 153 return -EOPNOTSUPP; 154 155 return __intel_dsm(intel_host, dev, fn, result); 156 } 157 158 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev, 159 struct mmc_host *mmc) 160 { 161 int err; 162 163 intel_host->hs_caps = ~0; 164 165 err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns); 166 if (err) { 167 pr_debug("%s: DSM not supported, error %d\n", 168 mmc_hostname(mmc), err); 169 return; 170 } 171 172 pr_debug("%s: DSM function mask %#x\n", 173 mmc_hostname(mmc), intel_host->dsm_fns); 174 175 intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps); 176 } 177 178 static int intel_start_signal_voltage_switch(struct mmc_host *mmc, 179 struct mmc_ios *ios) 180 { 181 struct device *dev = mmc_dev(mmc); 182 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 183 struct intel_host *intel_host = sdhci_acpi_priv(c); 184 unsigned int fn; 185 u32 result = 0; 186 int err; 187 188 err = sdhci_start_signal_voltage_switch(mmc, ios); 189 if (err) 190 return err; 191 192 switch (ios->signal_voltage) { 193 case MMC_SIGNAL_VOLTAGE_330: 194 fn = INTEL_DSM_V33_SWITCH; 195 break; 196 case MMC_SIGNAL_VOLTAGE_180: 197 fn = INTEL_DSM_V18_SWITCH; 198 break; 199 default: 200 return 0; 201 } 202 203 err = intel_dsm(intel_host, dev, fn, &result); 204 pr_debug("%s: %s DSM fn %u error %d result %u\n", 205 mmc_hostname(mmc), __func__, fn, err, result); 206 207 return 0; 208 } 209 210 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host) 211 { 212 u8 reg; 213 214 reg = sdhci_readb(host, SDHCI_POWER_CONTROL); 215 reg |= 0x10; 216 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); 217 /* For eMMC, minimum is 1us but give it 9us for good measure */ 218 udelay(9); 219 reg &= ~0x10; 220 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); 221 /* For eMMC, minimum is 200us but give it 300us for good measure */ 222 usleep_range(300, 1000); 223 } 224 225 static const struct sdhci_ops sdhci_acpi_ops_dflt = { 226 .set_clock = sdhci_set_clock, 227 .set_bus_width = sdhci_set_bus_width, 228 .reset = sdhci_reset, 229 .set_uhs_signaling = sdhci_set_uhs_signaling, 230 }; 231 232 static const struct sdhci_ops sdhci_acpi_ops_int = { 233 .set_clock = sdhci_set_clock, 234 .set_bus_width = sdhci_set_bus_width, 235 .reset = sdhci_reset, 236 .set_uhs_signaling = sdhci_set_uhs_signaling, 237 .hw_reset = sdhci_acpi_int_hw_reset, 238 }; 239 240 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = { 241 .ops = &sdhci_acpi_ops_int, 242 }; 243 244 #ifdef CONFIG_X86 245 246 static bool sdhci_acpi_byt(void) 247 { 248 static const struct x86_cpu_id byt[] = { 249 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 }, 250 {} 251 }; 252 253 return x86_match_cpu(byt); 254 } 255 256 static bool sdhci_acpi_cht(void) 257 { 258 static const struct x86_cpu_id cht[] = { 259 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT }, 260 {} 261 }; 262 263 return x86_match_cpu(cht); 264 } 265 266 #define BYT_IOSF_SCCEP 0x63 267 #define BYT_IOSF_OCP_NETCTRL0 0x1078 268 #define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8) 269 270 static void sdhci_acpi_byt_setting(struct device *dev) 271 { 272 u32 val = 0; 273 274 if (!sdhci_acpi_byt()) 275 return; 276 277 if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0, 278 &val)) { 279 dev_err(dev, "%s read error\n", __func__); 280 return; 281 } 282 283 if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE)) 284 return; 285 286 val &= ~BYT_IOSF_OCP_TIMEOUT_BASE; 287 288 if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0, 289 val)) { 290 dev_err(dev, "%s write error\n", __func__); 291 return; 292 } 293 294 dev_dbg(dev, "%s completed\n", __func__); 295 } 296 297 static bool sdhci_acpi_byt_defer(struct device *dev) 298 { 299 if (!sdhci_acpi_byt()) 300 return false; 301 302 if (!iosf_mbi_available()) 303 return true; 304 305 sdhci_acpi_byt_setting(dev); 306 307 return false; 308 } 309 310 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device, 311 unsigned int slot, unsigned int parent_slot) 312 { 313 struct pci_dev *dev, *parent, *from = NULL; 314 315 while (1) { 316 dev = pci_get_device(vendor, device, from); 317 pci_dev_put(from); 318 if (!dev) 319 break; 320 parent = pci_upstream_bridge(dev); 321 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot && 322 parent && PCI_SLOT(parent->devfn) == parent_slot && 323 !pci_upstream_bridge(parent)) { 324 pci_dev_put(dev); 325 return true; 326 } 327 from = dev; 328 } 329 330 return false; 331 } 332 333 /* 334 * GPDwin uses PCI wifi which conflicts with SDIO's use of 335 * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is 336 * problematic, but since SDIO is only used for wifi, the presence of the PCI 337 * wifi card in the expected slot with an ACPI companion node, is used to 338 * indicate that acpi_device_fix_up_power() should be avoided. 339 */ 340 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid, 341 const char *uid) 342 { 343 return sdhci_acpi_cht() && 344 !strcmp(hid, "80860F14") && 345 !strcmp(uid, "2") && 346 sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28); 347 } 348 349 #else 350 351 static inline void sdhci_acpi_byt_setting(struct device *dev) 352 { 353 } 354 355 static inline bool sdhci_acpi_byt_defer(struct device *dev) 356 { 357 return false; 358 } 359 360 static inline bool sdhci_acpi_no_fixup_child_power(const char *hid, 361 const char *uid) 362 { 363 return false; 364 } 365 366 #endif 367 368 static int bxt_get_cd(struct mmc_host *mmc) 369 { 370 int gpio_cd = mmc_gpio_get_cd(mmc); 371 struct sdhci_host *host = mmc_priv(mmc); 372 unsigned long flags; 373 int ret = 0; 374 375 if (!gpio_cd) 376 return 0; 377 378 spin_lock_irqsave(&host->lock, flags); 379 380 if (host->flags & SDHCI_DEVICE_DEAD) 381 goto out; 382 383 ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); 384 out: 385 spin_unlock_irqrestore(&host->lock, flags); 386 387 return ret; 388 } 389 390 static int intel_probe_slot(struct platform_device *pdev, const char *hid, 391 const char *uid) 392 { 393 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 394 struct intel_host *intel_host = sdhci_acpi_priv(c); 395 struct sdhci_host *host = c->host; 396 397 if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") && 398 sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 && 399 sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807) 400 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ 401 402 if (hid && !strcmp(hid, "80865ACA")) 403 host->mmc_host_ops.get_cd = bxt_get_cd; 404 405 intel_dsm_init(intel_host, &pdev->dev, host->mmc); 406 407 host->mmc_host_ops.start_signal_voltage_switch = 408 intel_start_signal_voltage_switch; 409 410 return 0; 411 } 412 413 static int intel_setup_host(struct platform_device *pdev) 414 { 415 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 416 struct intel_host *intel_host = sdhci_acpi_priv(c); 417 418 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25)) 419 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25; 420 421 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50)) 422 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50; 423 424 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50)) 425 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50; 426 427 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104)) 428 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104; 429 430 return 0; 431 } 432 433 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { 434 .chip = &sdhci_acpi_chip_int, 435 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | 436 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | 437 MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY, 438 .flags = SDHCI_ACPI_RUNTIME_PM, 439 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, 440 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 441 SDHCI_QUIRK2_STOP_WITH_TC | 442 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400, 443 .probe_slot = intel_probe_slot, 444 .setup_host = intel_setup_host, 445 .priv_size = sizeof(struct intel_host), 446 }; 447 448 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = { 449 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | 450 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, 451 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON, 452 .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD | 453 MMC_CAP_WAIT_WHILE_BUSY, 454 .flags = SDHCI_ACPI_RUNTIME_PM, 455 .pm_caps = MMC_PM_KEEP_POWER, 456 .probe_slot = intel_probe_slot, 457 .setup_host = intel_setup_host, 458 .priv_size = sizeof(struct intel_host), 459 }; 460 461 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = { 462 .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL | 463 SDHCI_ACPI_RUNTIME_PM, 464 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, 465 .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON | 466 SDHCI_QUIRK2_STOP_WITH_TC, 467 .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM, 468 .probe_slot = intel_probe_slot, 469 .setup_host = intel_setup_host, 470 .priv_size = sizeof(struct intel_host), 471 }; 472 473 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = { 474 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, 475 .quirks2 = SDHCI_QUIRK2_NO_1_8_V, 476 .caps = MMC_CAP_NONREMOVABLE, 477 }; 478 479 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = { 480 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, 481 .caps = MMC_CAP_NONREMOVABLE, 482 }; 483 484 /* AMD sdhci reset dll register. */ 485 #define SDHCI_AMD_RESET_DLL_REGISTER 0x908 486 487 static int amd_select_drive_strength(struct mmc_card *card, 488 unsigned int max_dtr, int host_drv, 489 int card_drv, int *drv_type) 490 { 491 return MMC_SET_DRIVER_TYPE_A; 492 } 493 494 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host) 495 { 496 /* AMD Platform requires dll setting */ 497 sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER); 498 usleep_range(10, 20); 499 sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER); 500 } 501 502 /* 503 * For AMD Platform it is required to disable the tuning 504 * bit first controller to bring to HS Mode from HS200 505 * mode, later enable to tune to HS400 mode. 506 */ 507 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 508 { 509 struct sdhci_host *host = mmc_priv(mmc); 510 unsigned int old_timing = host->timing; 511 512 sdhci_set_ios(mmc, ios); 513 if (old_timing == MMC_TIMING_MMC_HS200 && 514 ios->timing == MMC_TIMING_MMC_HS) 515 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2); 516 if (old_timing != MMC_TIMING_MMC_HS400 && 517 ios->timing == MMC_TIMING_MMC_HS400) { 518 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2); 519 sdhci_acpi_amd_hs400_dll(host); 520 } 521 } 522 523 static const struct sdhci_ops sdhci_acpi_ops_amd = { 524 .set_clock = sdhci_set_clock, 525 .set_bus_width = sdhci_set_bus_width, 526 .reset = sdhci_reset, 527 .set_uhs_signaling = sdhci_set_uhs_signaling, 528 }; 529 530 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = { 531 .ops = &sdhci_acpi_ops_amd, 532 }; 533 534 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev, 535 const char *hid, const char *uid) 536 { 537 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 538 struct sdhci_host *host = c->host; 539 540 sdhci_read_caps(host); 541 if (host->caps1 & SDHCI_SUPPORT_DDR50) 542 host->mmc->caps = MMC_CAP_1_8V_DDR; 543 544 if ((host->caps1 & SDHCI_SUPPORT_SDR104) && 545 (host->mmc->caps & MMC_CAP_1_8V_DDR)) 546 host->mmc->caps2 = MMC_CAP2_HS400_1_8V; 547 548 host->mmc_host_ops.select_drive_strength = amd_select_drive_strength; 549 host->mmc_host_ops.set_ios = amd_set_ios; 550 return 0; 551 } 552 553 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = { 554 .chip = &sdhci_acpi_chip_amd, 555 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE, 556 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE | 557 SDHCI_QUIRK_32BIT_ADMA_SIZE, 558 .probe_slot = sdhci_acpi_emmc_amd_probe_slot, 559 }; 560 561 struct sdhci_acpi_uid_slot { 562 const char *hid; 563 const char *uid; 564 const struct sdhci_acpi_slot *slot; 565 }; 566 567 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = { 568 { "80865ACA", NULL, &sdhci_acpi_slot_int_sd }, 569 { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc }, 570 { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio }, 571 { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc }, 572 { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio }, 573 { "80860F14" , "3" , &sdhci_acpi_slot_int_sd }, 574 { "80860F16" , NULL, &sdhci_acpi_slot_int_sd }, 575 { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio }, 576 { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd }, 577 { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio }, 578 { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio }, 579 { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio }, 580 { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd }, 581 { "PNP0D40" }, 582 { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v }, 583 { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd }, 584 { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc }, 585 { }, 586 }; 587 588 static const struct acpi_device_id sdhci_acpi_ids[] = { 589 { "80865ACA" }, 590 { "80865ACC" }, 591 { "80865AD0" }, 592 { "80860F14" }, 593 { "80860F16" }, 594 { "INT33BB" }, 595 { "INT33C6" }, 596 { "INT3436" }, 597 { "INT344D" }, 598 { "PNP0D40" }, 599 { "QCOM8051" }, 600 { "QCOM8052" }, 601 { "AMDI0040" }, 602 { }, 603 }; 604 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids); 605 606 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid, 607 const char *uid) 608 { 609 const struct sdhci_acpi_uid_slot *u; 610 611 for (u = sdhci_acpi_uids; u->hid; u++) { 612 if (strcmp(u->hid, hid)) 613 continue; 614 if (!u->uid) 615 return u->slot; 616 if (uid && !strcmp(u->uid, uid)) 617 return u->slot; 618 } 619 return NULL; 620 } 621 622 static int sdhci_acpi_probe(struct platform_device *pdev) 623 { 624 struct device *dev = &pdev->dev; 625 const struct sdhci_acpi_slot *slot; 626 struct acpi_device *device, *child; 627 struct sdhci_acpi_host *c; 628 struct sdhci_host *host; 629 struct resource *iomem; 630 resource_size_t len; 631 size_t priv_size; 632 const char *hid; 633 const char *uid; 634 int err; 635 636 device = ACPI_COMPANION(dev); 637 if (!device) 638 return -ENODEV; 639 640 hid = acpi_device_hid(device); 641 uid = acpi_device_uid(device); 642 643 slot = sdhci_acpi_get_slot(hid, uid); 644 645 /* Power on the SDHCI controller and its children */ 646 acpi_device_fix_up_power(device); 647 if (!sdhci_acpi_no_fixup_child_power(hid, uid)) { 648 list_for_each_entry(child, &device->children, node) 649 if (child->status.present && child->status.enabled) 650 acpi_device_fix_up_power(child); 651 } 652 653 if (sdhci_acpi_byt_defer(dev)) 654 return -EPROBE_DEFER; 655 656 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 657 if (!iomem) 658 return -ENOMEM; 659 660 len = resource_size(iomem); 661 if (len < 0x100) 662 dev_err(dev, "Invalid iomem size!\n"); 663 664 if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev))) 665 return -ENOMEM; 666 667 priv_size = slot ? slot->priv_size : 0; 668 host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size); 669 if (IS_ERR(host)) 670 return PTR_ERR(host); 671 672 c = sdhci_priv(host); 673 c->host = host; 674 c->slot = slot; 675 c->pdev = pdev; 676 c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM); 677 678 platform_set_drvdata(pdev, c); 679 680 host->hw_name = "ACPI"; 681 host->ops = &sdhci_acpi_ops_dflt; 682 host->irq = platform_get_irq(pdev, 0); 683 if (host->irq < 0) { 684 err = -EINVAL; 685 goto err_free; 686 } 687 688 host->ioaddr = devm_ioremap_nocache(dev, iomem->start, 689 resource_size(iomem)); 690 if (host->ioaddr == NULL) { 691 err = -ENOMEM; 692 goto err_free; 693 } 694 695 if (c->slot) { 696 if (c->slot->probe_slot) { 697 err = c->slot->probe_slot(pdev, hid, uid); 698 if (err) 699 goto err_free; 700 } 701 if (c->slot->chip) { 702 host->ops = c->slot->chip->ops; 703 host->quirks |= c->slot->chip->quirks; 704 host->quirks2 |= c->slot->chip->quirks2; 705 host->mmc->caps |= c->slot->chip->caps; 706 host->mmc->caps2 |= c->slot->chip->caps2; 707 host->mmc->pm_caps |= c->slot->chip->pm_caps; 708 } 709 host->quirks |= c->slot->quirks; 710 host->quirks2 |= c->slot->quirks2; 711 host->mmc->caps |= c->slot->caps; 712 host->mmc->caps2 |= c->slot->caps2; 713 host->mmc->pm_caps |= c->slot->pm_caps; 714 } 715 716 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP; 717 718 if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) { 719 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL); 720 721 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL); 722 if (err) { 723 if (err == -EPROBE_DEFER) 724 goto err_free; 725 dev_warn(dev, "failed to setup card detect gpio\n"); 726 c->use_runtime_pm = false; 727 } 728 } 729 730 err = sdhci_setup_host(host); 731 if (err) 732 goto err_free; 733 734 if (c->slot && c->slot->setup_host) { 735 err = c->slot->setup_host(pdev); 736 if (err) 737 goto err_cleanup; 738 } 739 740 err = __sdhci_add_host(host); 741 if (err) 742 goto err_cleanup; 743 744 if (c->use_runtime_pm) { 745 pm_runtime_set_active(dev); 746 pm_suspend_ignore_children(dev, 1); 747 pm_runtime_set_autosuspend_delay(dev, 50); 748 pm_runtime_use_autosuspend(dev); 749 pm_runtime_enable(dev); 750 } 751 752 device_enable_async_suspend(dev); 753 754 return 0; 755 756 err_cleanup: 757 sdhci_cleanup_host(c->host); 758 err_free: 759 sdhci_free_host(c->host); 760 return err; 761 } 762 763 static int sdhci_acpi_remove(struct platform_device *pdev) 764 { 765 struct sdhci_acpi_host *c = platform_get_drvdata(pdev); 766 struct device *dev = &pdev->dev; 767 int dead; 768 769 if (c->use_runtime_pm) { 770 pm_runtime_get_sync(dev); 771 pm_runtime_disable(dev); 772 pm_runtime_put_noidle(dev); 773 } 774 775 if (c->slot && c->slot->remove_slot) 776 c->slot->remove_slot(pdev); 777 778 dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0); 779 sdhci_remove_host(c->host, dead); 780 sdhci_free_host(c->host); 781 782 return 0; 783 } 784 785 #ifdef CONFIG_PM_SLEEP 786 787 static int sdhci_acpi_suspend(struct device *dev) 788 { 789 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 790 struct sdhci_host *host = c->host; 791 792 if (host->tuning_mode != SDHCI_TUNING_MODE_3) 793 mmc_retune_needed(host->mmc); 794 795 return sdhci_suspend_host(host); 796 } 797 798 static int sdhci_acpi_resume(struct device *dev) 799 { 800 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 801 802 sdhci_acpi_byt_setting(&c->pdev->dev); 803 804 return sdhci_resume_host(c->host); 805 } 806 807 #endif 808 809 #ifdef CONFIG_PM 810 811 static int sdhci_acpi_runtime_suspend(struct device *dev) 812 { 813 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 814 struct sdhci_host *host = c->host; 815 816 if (host->tuning_mode != SDHCI_TUNING_MODE_3) 817 mmc_retune_needed(host->mmc); 818 819 return sdhci_runtime_suspend_host(host); 820 } 821 822 static int sdhci_acpi_runtime_resume(struct device *dev) 823 { 824 struct sdhci_acpi_host *c = dev_get_drvdata(dev); 825 826 sdhci_acpi_byt_setting(&c->pdev->dev); 827 828 return sdhci_runtime_resume_host(c->host); 829 } 830 831 #endif 832 833 static const struct dev_pm_ops sdhci_acpi_pm_ops = { 834 SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume) 835 SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend, 836 sdhci_acpi_runtime_resume, NULL) 837 }; 838 839 static struct platform_driver sdhci_acpi_driver = { 840 .driver = { 841 .name = "sdhci-acpi", 842 .acpi_match_table = sdhci_acpi_ids, 843 .pm = &sdhci_acpi_pm_ops, 844 }, 845 .probe = sdhci_acpi_probe, 846 .remove = sdhci_acpi_remove, 847 }; 848 849 module_platform_driver(sdhci_acpi_driver); 850 851 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver"); 852 MODULE_AUTHOR("Adrian Hunter"); 853 MODULE_LICENSE("GPL v2"); 854