linux/drivers/acpi/x86/utils.c
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  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

  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 #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00

138 lines
4.6 KiB
C

// 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.
*
* 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;
}