// SPDX-License-Identifier: GPL-2.0-only /* * X86 ACPI Utility Functions * * Copyright (C) 2017 Hans de Goede * * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: * Copyright (C) 2013-2015 Intel Corporation. All rights reserved. */ #include #include #include #include #include "../internal.h" /* * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because * some recent Windows drivers bind to one device but poke at multiple * devices at the same time, so the others get hidden. * * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows * driver bugs. We use DMI matching to match known cases of this. * * Likewise sometimes some not-actually present devices are sometimes * reported as present, which may cause issues. * * We work around this by using the below quirk list to override the status * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0). * Note this MUST only be done for devices where this is safe. * * This status overriding is limited to specific CPU (SoC) models both to * avoid potentially causing trouble on other models and because some HIDs * are re-used on different SoCs for completely different devices. */ struct override_status_id { struct acpi_device_id hid[2]; struct x86_cpu_id cpu_ids[2]; struct dmi_system_id dmi_ids[2]; /* Optional */ const char *uid; const char *path; unsigned long long status; }; #define ENTRY(status, hid, uid, path, cpu_model, dmi...) { \ { { hid, }, {} }, \ { X86_MATCH_INTEL_FAM6_MODEL(cpu_model, NULL), {} }, \ { { .matches = dmi }, {} }, \ uid, \ path, \ status, \ } #define PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_model, dmi) #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ ENTRY(0, hid, uid, NULL, cpu_model, dmi) #define PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_model, dmi) #define NOT_PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ ENTRY(0, "", NULL, path, cpu_model, dmi) static const struct override_status_id override_status_ids[] = { /* * Bay / Cherry Trail PWM directly poked by GPU driver in win10, * but Linux uses a separate PWM driver, harmless if not used. */ PRESENT_ENTRY_HID("80860F09", "1", ATOM_SILVERMONT, {}), PRESENT_ENTRY_HID("80862288", "1", ATOM_AIRMONT, {}), /* * The INT0002 device is necessary to clear wakeup interrupt sources * on Cherry Trail devices, without it we get nobody cared IRQ msgs. */ PRESENT_ENTRY_HID("INT0002", "1", ATOM_AIRMONT, {}), /* * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides * the touchscreen ACPI device until a certain time * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed * *and* _STA has been called at least 3 times since. */ PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), }), PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"), }), /* * The GPD win BIOS dated 20170221 has disabled the accelerometer, the * drivers sometimes cause crashes under Windows and this is how the * manufacturer has solved this :| The DMI match may not seem unique, * but it is. In the 67000+ DMI decode dumps from linux-hardware.org * only 116 have board_vendor set to "AMI Corporation" and of those 116 * only the GPD win and pocket entries' board_name is "Default string". * * Unfortunately the GPD pocket also uses these strings and its BIOS * was copy-pasted from the GPD win, so it has a disabled KIOX000A * node which we should not enable, thus we also check the BIOS date. */ PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), DMI_MATCH(DMI_BOARD_NAME, "Default string"), DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), DMI_MATCH(DMI_BIOS_DATE, "02/21/2017") }), PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), DMI_MATCH(DMI_BOARD_NAME, "Default string"), DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), DMI_MATCH(DMI_BIOS_DATE, "03/20/2017") }), PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), DMI_MATCH(DMI_BOARD_NAME, "Default string"), DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), DMI_MATCH(DMI_BIOS_DATE, "05/25/2017") }), /* * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO * mmc controller enabled and that has a child-device which _PS3 * method sets a GPIO causing the PCI wifi card to turn off. * See above remark about uniqueness of the DMI match. */ NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", ATOM_AIRMONT, { DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), }), }; bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status) { bool ret = false; unsigned int i; for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) { if (!x86_match_cpu(override_status_ids[i].cpu_ids)) continue; if (override_status_ids[i].dmi_ids[0].matches[0].slot && !dmi_check_system(override_status_ids[i].dmi_ids)) continue; if (override_status_ids[i].path) { struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL }; bool match; if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path)) continue; match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0; kfree(path.pointer); if (!match) continue; } else { if (acpi_match_device_ids(adev, override_status_ids[i].hid)) continue; if (!adev->pnp.unique_id || strcmp(adev->pnp.unique_id, override_status_ids[i].uid)) continue; } *status = override_status_ids[i].status; ret = true; break; } return ret; }