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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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