138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* X86 ACPI Utility Functions
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*
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* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
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*
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* Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
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* Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
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*/
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#include <linux/acpi.h>
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#include <linux/dmi.h>
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#include <asm/cpu_device_id.h>
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#include <asm/intel-family.h>
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#include "../internal.h"
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/*
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* Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
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* some recent Windows drivers bind to one device but poke at multiple
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* devices at the same time, so the others get hidden.
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*
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* Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
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* driver bugs. We use DMI matching to match known cases of this.
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*
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* We work around this by always reporting ACPI_STA_DEFAULT for these
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* devices. Note this MUST only be done for devices where this is safe.
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*
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* This forcing of devices to be present is limited to specific CPU (SoC)
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* models both to avoid potentially causing trouble on other models and
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* because some HIDs are re-used on different SoCs for completely
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* different devices.
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*/
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struct always_present_id {
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struct acpi_device_id hid[2];
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struct x86_cpu_id cpu_ids[2];
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struct dmi_system_id dmi_ids[2]; /* Optional */
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const char *uid;
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};
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#define X86_MATCH(model) X86_MATCH_INTEL_FAM6_MODEL(model, NULL)
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#define ENTRY(hid, uid, cpu_models, dmi...) { \
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{ { hid, }, {} }, \
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{ cpu_models, {} }, \
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{ { .matches = dmi }, {} }, \
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uid, \
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}
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static const struct always_present_id always_present_ids[] = {
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/*
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* Bay / Cherry Trail PWM directly poked by GPU driver in win10,
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* but Linux uses a separate PWM driver, harmless if not used.
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*/
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ENTRY("80860F09", "1", X86_MATCH(ATOM_SILVERMONT), {}),
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ENTRY("80862288", "1", X86_MATCH(ATOM_AIRMONT), {}),
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/* Lenovo Yoga Book uses PWM2 for keyboard backlight control */
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ENTRY("80862289", "2", X86_MATCH(ATOM_AIRMONT), {
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DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
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}),
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/*
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* The INT0002 device is necessary to clear wakeup interrupt sources
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* on Cherry Trail devices, without it we get nobody cared IRQ msgs.
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*/
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ENTRY("INT0002", "1", X86_MATCH(ATOM_AIRMONT), {}),
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/*
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* On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
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* the touchscreen ACPI device until a certain time
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* after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
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* *and* _STA has been called at least 3 times since.
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*/
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ENTRY("SYNA7500", "1", X86_MATCH(HASWELL_L), {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
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}),
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ENTRY("SYNA7500", "1", X86_MATCH(HASWELL_L), {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
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}),
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/*
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* The GPD win BIOS dated 20170221 has disabled the accelerometer, the
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* drivers sometimes cause crashes under Windows and this is how the
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* manufacturer has solved this :| Note that the the DMI data is less
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* generic then it seems, a board_vendor of "AMI Corporation" is quite
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* rare and a board_name of "Default String" also is rare.
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*
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* Unfortunately the GPD pocket also uses these strings and its BIOS
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* was copy-pasted from the GPD win, so it has a disabled KIOX000A
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* node which we should not enable, thus we also check the BIOS date.
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*/
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ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
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DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
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DMI_MATCH(DMI_BOARD_NAME, "Default string"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
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DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
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}),
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ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
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DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
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DMI_MATCH(DMI_BOARD_NAME, "Default string"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
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DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
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}),
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ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
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DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
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DMI_MATCH(DMI_BOARD_NAME, "Default string"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
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DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
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}),
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};
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bool acpi_device_always_present(struct acpi_device *adev)
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{
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bool ret = false;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(always_present_ids); i++) {
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if (acpi_match_device_ids(adev, always_present_ids[i].hid))
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continue;
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if (!adev->pnp.unique_id ||
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strcmp(adev->pnp.unique_id, always_present_ids[i].uid))
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continue;
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if (!x86_match_cpu(always_present_ids[i].cpu_ids))
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continue;
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if (always_present_ids[i].dmi_ids[0].matches[0].slot &&
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!dmi_check_system(always_present_ids[i].dmi_ids))
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continue;
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ret = true;
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break;
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}
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return ret;
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}
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