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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * 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.
- */
- #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.
- *
- * 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;
- }
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