| /* |
| * X86 ACPI Utility Functions |
| * |
| * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> |
| * |
| * Based on various non upstream patches to support the CHT Whiskey Cove PMIC: |
| * Copyright (C) 2013-2015 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/acpi.h> |
| #include <linux/dmi.h> |
| #include <asm/cpu_device_id.h> |
| #include <asm/intel-family.h> |
| #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. |
| * |
| * We work around this by always reporting ACPI_STA_DEFAULT for these |
| * devices. Note this MUST only be done for devices where this is safe. |
| * |
| * This forcing of devices to be present 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 always_present_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; |
| }; |
| |
| #define ICPU(model) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, } |
| |
| #define ENTRY(hid, uid, cpu_models, dmi...) { \ |
| { { hid, }, {} }, \ |
| { cpu_models, {} }, \ |
| { { .matches = dmi }, {} }, \ |
| uid, \ |
| } |
| |
| static const struct always_present_id always_present_ids[] = { |
| /* |
| * Bay / Cherry Trail PWM directly poked by GPU driver in win10, |
| * but Linux uses a separate PWM driver, harmless if not used. |
| */ |
| ENTRY("80860F09", "1", ICPU(INTEL_FAM6_ATOM_SILVERMONT), {}), |
| ENTRY("80862288", "1", ICPU(INTEL_FAM6_ATOM_AIRMONT), {}), |
| |
| /* Lenovo Yoga Book uses PWM2 for keyboard backlight control */ |
| ENTRY("80862289", "2", ICPU(INTEL_FAM6_ATOM_AIRMONT), { |
| DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"), |
| }), |
| /* |
| * The INT0002 device is necessary to clear wakeup interrupt sources |
| * on Cherry Trail devices, without it we get nobody cared IRQ msgs. |
| */ |
| ENTRY("INT0002", "1", ICPU(INTEL_FAM6_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. |
| */ |
| ENTRY("SYNA7500", "1", ICPU(INTEL_FAM6_HASWELL_ULT), { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), |
| }), |
| ENTRY("SYNA7500", "1", ICPU(INTEL_FAM6_HASWELL_ULT), { |
| 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 :| Note that the the DMI data is less |
| * generic then it seems, a board_vendor of "AMI Corporation" is quite |
| * rare and a board_name of "Default String" also is rare. |
| * |
| * 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. |
| */ |
| ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_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") |
| }), |
| ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_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") |
| }), |
| ENTRY("KIOX000A", "1", ICPU(INTEL_FAM6_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") |
| }), |
| }; |
| |
| bool acpi_device_always_present(struct acpi_device *adev) |
| { |
| bool ret = false; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(always_present_ids); i++) { |
| if (acpi_match_device_ids(adev, always_present_ids[i].hid)) |
| continue; |
| |
| if (!adev->pnp.unique_id || |
| strcmp(adev->pnp.unique_id, always_present_ids[i].uid)) |
| continue; |
| |
| if (!x86_match_cpu(always_present_ids[i].cpu_ids)) |
| continue; |
| |
| if (always_present_ids[i].dmi_ids[0].matches[0].slot && |
| !dmi_check_system(always_present_ids[i].dmi_ids)) |
| continue; |
| |
| ret = true; |
| break; |
| } |
| |
| return ret; |
| } |