diff options
Diffstat (limited to 'drivers/acpi/x86/utils.c')
| -rw-r--r-- | drivers/acpi/x86/utils.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c new file mode 100644 index 000000000..9a8e286dd --- /dev/null +++ b/drivers/acpi/x86/utils.c @@ -0,0 +1,135 @@ +/* + * 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), {}), + /* + * 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; +} |