1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * X86 ACPI Utility Functions 4 * 5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> 6 * 7 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: 8 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved. 9 */ 10 11 #define pr_fmt(fmt) "ACPI: " fmt 12 13 #include <linux/acpi.h> 14 #include <linux/dmi.h> 15 #include <linux/pci.h> 16 #include <linux/platform_device.h> 17 #include <asm/cpu_device_id.h> 18 #include <asm/intel-family.h> 19 #include "../internal.h" 20 21 /* 22 * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because 23 * some recent Windows drivers bind to one device but poke at multiple 24 * devices at the same time, so the others get hidden. 25 * 26 * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows 27 * driver bugs. We use DMI matching to match known cases of this. 28 * 29 * Likewise sometimes some not-actually present devices are sometimes 30 * reported as present, which may cause issues. 31 * 32 * We work around this by using the below quirk list to override the status 33 * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0). 34 * Note this MUST only be done for devices where this is safe. 35 * 36 * This status overriding is limited to specific CPU (SoC) models both to 37 * avoid potentially causing trouble on other models and because some HIDs 38 * are re-used on different SoCs for completely different devices. 39 */ 40 struct override_status_id { 41 struct acpi_device_id hid[2]; 42 struct x86_cpu_id cpu_ids[2]; 43 struct dmi_system_id dmi_ids[2]; /* Optional */ 44 const char *uid; 45 const char *path; 46 unsigned long long status; 47 }; 48 49 #define ENTRY(status, hid, uid, path, cpu_model, dmi...) { \ 50 { { hid, }, {} }, \ 51 { X86_MATCH_INTEL_FAM6_MODEL(cpu_model, NULL), {} }, \ 52 { { .matches = dmi }, {} }, \ 53 uid, \ 54 path, \ 55 status, \ 56 } 57 58 #define PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 59 ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_model, dmi) 60 61 #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 62 ENTRY(0, hid, uid, NULL, cpu_model, dmi) 63 64 #define PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 65 ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_model, dmi) 66 67 #define NOT_PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 68 ENTRY(0, "", NULL, path, cpu_model, dmi) 69 70 static const struct override_status_id override_status_ids[] = { 71 /* 72 * Bay / Cherry Trail PWM directly poked by GPU driver in win10, 73 * but Linux uses a separate PWM driver, harmless if not used. 74 */ 75 PRESENT_ENTRY_HID("80860F09", "1", ATOM_SILVERMONT, {}), 76 PRESENT_ENTRY_HID("80862288", "1", ATOM_AIRMONT, {}), 77 78 /* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */ 79 PRESENT_ENTRY_HID("80862289", "2", ATOM_AIRMONT, { 80 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"), 81 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"), 82 }), 83 84 /* 85 * The INT0002 device is necessary to clear wakeup interrupt sources 86 * on Cherry Trail devices, without it we get nobody cared IRQ msgs. 87 */ 88 PRESENT_ENTRY_HID("INT0002", "1", ATOM_AIRMONT, {}), 89 /* 90 * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides 91 * the touchscreen ACPI device until a certain time 92 * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed 93 * *and* _STA has been called at least 3 times since. 94 */ 95 PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { 96 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 97 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), 98 }), 99 PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { 100 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 101 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"), 102 }), 103 104 /* 105 * The GPD win BIOS dated 20170221 has disabled the accelerometer, the 106 * drivers sometimes cause crashes under Windows and this is how the 107 * manufacturer has solved this :| The DMI match may not seem unique, 108 * but it is. In the 67000+ DMI decode dumps from linux-hardware.org 109 * only 116 have board_vendor set to "AMI Corporation" and of those 116 110 * only the GPD win and pocket entries' board_name is "Default string". 111 * 112 * Unfortunately the GPD pocket also uses these strings and its BIOS 113 * was copy-pasted from the GPD win, so it has a disabled KIOX000A 114 * node which we should not enable, thus we also check the BIOS date. 115 */ 116 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 117 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 118 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 119 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 120 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017") 121 }), 122 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 123 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 124 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 125 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 126 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017") 127 }), 128 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 129 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 130 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 131 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 132 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017") 133 }), 134 135 /* 136 * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO 137 * mmc controller enabled and that has a child-device which _PS3 138 * method sets a GPIO causing the PCI wifi card to turn off. 139 * See above remark about uniqueness of the DMI match. 140 */ 141 NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", ATOM_AIRMONT, { 142 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 143 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 144 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 145 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 146 }), 147 148 /* 149 * The LSM303D on the Lenovo Yoga Tablet 2 series is present 150 * as both ACCL0001 and MAGN0001. As we can only ever register an 151 * i2c client for one of them, ignore MAGN0001. 152 */ 153 NOT_PRESENT_ENTRY_HID("MAGN0001", "1", ATOM_SILVERMONT, { 154 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 155 DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"), 156 }), 157 }; 158 159 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status) 160 { 161 bool ret = false; 162 unsigned int i; 163 164 for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) { 165 if (!x86_match_cpu(override_status_ids[i].cpu_ids)) 166 continue; 167 168 if (override_status_ids[i].dmi_ids[0].matches[0].slot && 169 !dmi_check_system(override_status_ids[i].dmi_ids)) 170 continue; 171 172 if (override_status_ids[i].path) { 173 struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL }; 174 bool match; 175 176 if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path)) 177 continue; 178 179 match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0; 180 kfree(path.pointer); 181 182 if (!match) 183 continue; 184 } else { 185 if (acpi_match_device_ids(adev, override_status_ids[i].hid)) 186 continue; 187 188 if (!adev->pnp.unique_id || 189 strcmp(adev->pnp.unique_id, override_status_ids[i].uid)) 190 continue; 191 } 192 193 *status = override_status_ids[i].status; 194 ret = true; 195 break; 196 } 197 198 return ret; 199 } 200 201 /* 202 * AMD systems from Renoir onwards *require* that the NVME controller 203 * is put into D3 over a Modern Standby / suspend-to-idle cycle. 204 * 205 * This is "typically" accomplished using the `StorageD3Enable` 206 * property in the _DSD that is checked via the `acpi_storage_d3` function 207 * but some OEM systems still don't have it in their BIOS. 208 * 209 * The Microsoft documentation for StorageD3Enable mentioned that Windows has 210 * a hardcoded allowlist for D3 support as well as a registry key to override 211 * the BIOS, which has been used for these cases. 212 * 213 * This allows quirking on Linux in a similar fashion. 214 * 215 * Cezanne systems shouldn't *normally* need this as the BIOS includes 216 * StorageD3Enable. But for two reasons we have added it. 217 * 1) The BIOS on a number of Dell systems have ambiguity 218 * between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME. 219 * GPP1.NVME is needed to get StorageD3Enable node set properly. 220 * https://bugzilla.kernel.org/show_bug.cgi?id=216440 221 * https://bugzilla.kernel.org/show_bug.cgi?id=216773 222 * https://bugzilla.kernel.org/show_bug.cgi?id=217003 223 * 2) On at least one HP system StorageD3Enable is missing on the second NVME 224 * disk in the system. 225 * 3) On at least one HP Rembrandt system StorageD3Enable is missing on the only 226 * NVME device. 227 */ 228 bool force_storage_d3(void) 229 { 230 if (!cpu_feature_enabled(X86_FEATURE_ZEN)) 231 return false; 232 return acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0; 233 } 234 235 /* 236 * x86 ACPI boards which ship with only Android as their factory image usually 237 * declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes 238 * there are issues with serdev devices on these boards too, e.g. the resource 239 * points to the wrong serdev_controller. 240 * 241 * Instantiating I2C / serdev devs for these bogus devs causes various issues, 242 * e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them. 243 * The Android x86 kernel fork shipped on these devices has some special code 244 * to remove the bogus I2C clients (and AFAICT serdevs are ignored completely). 245 * 246 * The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or 247 * serdev code to skip instantiating any I2C or serdev devs on broken boards. 248 * 249 * In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids 250 * list. These are known to always be correct (and in case of the audio-codecs 251 * the drivers heavily rely on the codec being enumerated through ACPI). 252 * 253 * Note these boards typically do actually have I2C and serdev devices, 254 * just different ones then the ones described in their DSDT. The devices 255 * which are actually present are manually instantiated by the 256 * drivers/platform/x86/x86-android-tablets.c kernel module. 257 */ 258 #define ACPI_QUIRK_SKIP_I2C_CLIENTS BIT(0) 259 #define ACPI_QUIRK_UART1_SKIP BIT(1) 260 #define ACPI_QUIRK_UART1_TTY_UART2_SKIP BIT(2) 261 #define ACPI_QUIRK_PNP_UART1_SKIP BIT(3) 262 #define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY BIT(4) 263 #define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY BIT(5) 264 #define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS BIT(6) 265 266 static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = { 267 /* 268 * 1. Devices with only the skip / don't-skip AC and battery quirks, 269 * sorted alphabetically. 270 */ 271 { 272 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ 273 .matches = { 274 DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), 275 }, 276 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 277 }, 278 { 279 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ 280 .matches = { 281 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 282 DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), 283 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), 284 }, 285 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY 286 }, 287 288 /* 289 * 2. Devices which also have the skip i2c/serdev quirks and which 290 * need the x86-android-tablets module to properly work. 291 */ 292 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 293 { 294 /* Acer Iconia One 7 B1-750 */ 295 .matches = { 296 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 297 DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"), 298 }, 299 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 300 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 301 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 302 }, 303 { 304 .matches = { 305 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 306 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"), 307 }, 308 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 309 ACPI_QUIRK_UART1_TTY_UART2_SKIP | 310 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 311 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 312 }, 313 { 314 /* Lenovo Yoga Book X90F/L */ 315 .matches = { 316 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 317 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 318 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"), 319 }, 320 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 321 ACPI_QUIRK_UART1_SKIP | 322 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 323 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 324 }, 325 { 326 .matches = { 327 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 328 DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), 329 }, 330 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 331 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 332 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 333 }, 334 { 335 /* Lenovo Yoga Tablet 2 1050F/L */ 336 .matches = { 337 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."), 338 DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"), 339 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 340 /* Partial match on beginning of BIOS version */ 341 DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"), 342 }, 343 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 344 ACPI_QUIRK_PNP_UART1_SKIP | 345 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 346 }, 347 { 348 /* Lenovo Yoga Tab 3 Pro X90F */ 349 .matches = { 350 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), 351 DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"), 352 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), 353 }, 354 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 355 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 356 }, 357 { 358 /* Medion Lifetab S10346 */ 359 .matches = { 360 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 361 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 362 /* Way too generic, also match on BIOS data */ 363 DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"), 364 }, 365 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 366 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 367 }, 368 { 369 /* Nextbook Ares 8 (BYT version)*/ 370 .matches = { 371 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 372 DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"), 373 }, 374 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 375 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 376 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 377 }, 378 { 379 /* Nextbook Ares 8A (CHT version)*/ 380 .matches = { 381 DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), 382 DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), 383 DMI_MATCH(DMI_BIOS_VERSION, "M882"), 384 }, 385 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 386 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 387 }, 388 { 389 /* Vexia Edu Atla 10 tablet 9V version */ 390 .matches = { 391 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 392 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 393 /* Above strings are too generic, also match on BIOS date */ 394 DMI_MATCH(DMI_BIOS_DATE, "08/25/2014"), 395 }, 396 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 397 ACPI_QUIRK_UART1_SKIP | 398 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY | 399 ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS), 400 }, 401 { 402 /* Whitelabel (sold as various brands) TM800A550L */ 403 .matches = { 404 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 405 DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"), 406 /* Above strings are too generic, also match on BIOS version */ 407 DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"), 408 }, 409 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS | 410 ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY), 411 }, 412 #endif 413 {} 414 }; 415 416 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS) 417 static const struct acpi_device_id i2c_acpi_known_good_ids[] = { 418 { "10EC5640", 0 }, /* RealTek ALC5640 audio codec */ 419 { "10EC5651", 0 }, /* RealTek ALC5651 audio codec */ 420 { "INT33F4", 0 }, /* X-Powers AXP288 PMIC */ 421 { "INT33FD", 0 }, /* Intel Crystal Cove PMIC */ 422 { "INT34D3", 0 }, /* Intel Whiskey Cove PMIC */ 423 { "NPCE69A", 0 }, /* Asus Transformer keyboard dock */ 424 {} 425 }; 426 427 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev) 428 { 429 const struct dmi_system_id *dmi_id; 430 long quirks; 431 432 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 433 if (!dmi_id) 434 return false; 435 436 quirks = (unsigned long)dmi_id->driver_data; 437 if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS)) 438 return false; 439 440 return acpi_match_device_ids(adev, i2c_acpi_known_good_ids); 441 } 442 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration); 443 444 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 445 { 446 struct acpi_device *adev = ACPI_COMPANION(controller_parent); 447 const struct dmi_system_id *dmi_id; 448 long quirks = 0; 449 u64 uid = 0; 450 451 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 452 if (!dmi_id) 453 return 0; 454 455 quirks = (unsigned long)dmi_id->driver_data; 456 457 /* uid is left at 0 on errors and 0 is not a valid UART UID */ 458 acpi_dev_uid_to_integer(adev, &uid); 459 460 /* For PCI UARTs without an UID */ 461 if (!uid && dev_is_pci(controller_parent)) { 462 struct pci_dev *pdev = to_pci_dev(controller_parent); 463 464 /* 465 * Devfn values for PCI UARTs on Bay Trail SoCs, which are 466 * the only devices where this fallback is necessary. 467 */ 468 if (pdev->devfn == PCI_DEVFN(0x1e, 3)) 469 uid = 1; 470 else if (pdev->devfn == PCI_DEVFN(0x1e, 4)) 471 uid = 2; 472 } 473 474 if (!uid) 475 return 0; 476 477 if (!dev_is_platform(controller_parent) && !dev_is_pci(controller_parent)) { 478 /* PNP enumerated UARTs */ 479 if ((quirks & ACPI_QUIRK_PNP_UART1_SKIP) && uid == 1) 480 *skip = true; 481 482 return 0; 483 } 484 485 if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1) 486 *skip = true; 487 488 if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) { 489 if (uid == 1) 490 return -ENODEV; /* Create tty cdev instead of serdev */ 491 492 if (uid == 2) 493 *skip = true; 494 } 495 496 return 0; 497 } 498 499 bool acpi_quirk_skip_gpio_event_handlers(void) 500 { 501 const struct dmi_system_id *dmi_id; 502 long quirks; 503 504 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 505 if (!dmi_id) 506 return false; 507 508 quirks = (unsigned long)dmi_id->driver_data; 509 return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS); 510 } 511 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers); 512 #else 513 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 514 { 515 return 0; 516 } 517 #endif 518 519 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip) 520 { 521 *skip = false; 522 523 return acpi_dmi_skip_serdev_enumeration(controller_parent, skip); 524 } 525 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration); 526 527 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ 528 static const struct { 529 const char *hid; 530 int hrv; 531 } acpi_skip_ac_and_battery_pmic_ids[] = { 532 { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ 533 { "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ 534 }; 535 536 bool acpi_quirk_skip_acpi_ac_and_battery(void) 537 { 538 const struct dmi_system_id *dmi_id; 539 long quirks = 0; 540 int i; 541 542 dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids); 543 if (dmi_id) 544 quirks = (unsigned long)dmi_id->driver_data; 545 546 if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY) 547 return true; 548 549 if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY) 550 return false; 551 552 for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) { 553 if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1", 554 acpi_skip_ac_and_battery_pmic_ids[i].hrv)) { 555 pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n", 556 acpi_skip_ac_and_battery_pmic_ids[i].hid); 557 return true; 558 } 559 } 560 561 return false; 562 } 563 EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery); 564 565 /* This section provides a workaround for a specific x86 system 566 * which requires disabling of mwait to work correctly. 567 */ 568 static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id) 569 { 570 pr_notice("%s detected - disabling mwait for CPU C-states\n", 571 id->ident); 572 boot_option_idle_override = IDLE_NOMWAIT; 573 return 0; 574 } 575 576 static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = { 577 { 578 .callback = acpi_proc_quirk_set_no_mwait, 579 .ident = "Extensa 5220", 580 .matches = { 581 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 582 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 583 DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 584 DMI_MATCH(DMI_BOARD_NAME, "Columbia"), 585 }, 586 .driver_data = NULL, 587 }, 588 {} 589 }; 590 591 void __init acpi_proc_quirk_mwait_check(void) 592 { 593 /* 594 * Check whether the system is DMI table. If yes, OSPM 595 * should not use mwait for CPU-states. 596 */ 597 dmi_check_system(acpi_proc_quirk_mwait_dmi_table); 598 } 599