124 lines
4.0 KiB
C
Executable File
124 lines
4.0 KiB
C
Executable File
/*
|
|
* 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_SILVERMONT1), {}),
|
|
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 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"),
|
|
}),
|
|
/*
|
|
* The GPD win BIOS dated 20170320 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.
|
|
*/
|
|
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")
|
|
}),
|
|
};
|
|
|
|
bool acpi_device_always_present(struct acpi_device *adev)
|
|
{
|
|
u32 *status = (u32 *)&adev->status;
|
|
u32 old_status = *status;
|
|
bool ret = false;
|
|
unsigned int i;
|
|
|
|
/* acpi_match_device_ids checks status, so set it to default */
|
|
*status = ACPI_STA_DEFAULT;
|
|
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;
|
|
|
|
if (old_status != ACPI_STA_DEFAULT) /* Log only once */
|
|
dev_info(&adev->dev,
|
|
"Device [%s] is in always present list\n",
|
|
adev->pnp.bus_id);
|
|
|
|
ret = true;
|
|
break;
|
|
}
|
|
*status = old_status;
|
|
|
|
return ret;
|
|
}
|