drivers/acpi/x86/utils.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * X86 ACPI Utility Functions
   4  *
   5  * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
   8  * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
   9  */
  10
  11 #include <linux/acpi.h>
  12 #include <linux/dmi.h>
  13 #include <asm/cpu_device_id.h>
  14 #include <asm/intel-family.h>
  15 #include "../internal.h"
  16
  17 /*
  18  * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
  19  * some recent Windows drivers bind to one device but poke at multiple
  20  * devices at the same time, so the others get hidden.
  21  *
  22  * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
  23  * driver bugs. We use DMI matching to match known cases of this.
  24  *
  25  * We work around this by always reporting ACPI_STA_DEFAULT for these
  26  * devices. Note this MUST only be done for devices where this is safe.
  27  *
  28  * This forcing of devices to be present is limited to specific CPU (SoC)
  29  * models both to avoid potentially causing trouble on other models and
  30  * because some HIDs are re-used on different SoCs for completely
  31  * different devices.
  32  */
  33 struct always_present_id {
  34         struct acpi_device_id hid[2];
  35         struct x86_cpu_id cpu_ids[2];
  36         struct dmi_system_id dmi_ids[2]; /* Optional */
  37         const char *uid;
  38 };
  39
  40 #define X86_MATCH(model)        X86_MATCH_INTEL_FAM6_MODEL(model, NULL)
  41
  42 #define ENTRY(hid, uid, cpu_models, dmi...) {                           \
  43         { { hid, }, {} },                                               \
  44         { cpu_models, {} },                                             \
  45         { { .matches = dmi }, {} },                                     \
  46         uid,                                                            \
  47 }
  48
  49 static const struct always_present_id always_present_ids[] = {
  50         /*
  51          * Bay / Cherry Trail PWM directly poked by GPU driver in win10,
  52          * but Linux uses a separate PWM driver, harmless if not used.
  53          */
  54         ENTRY("80860F09", "1", X86_MATCH(ATOM_SILVERMONT), {}),
  55         ENTRY("80862288", "1", X86_MATCH(ATOM_AIRMONT), {}),
  56
  57         /* Lenovo Yoga Book uses PWM2 for keyboard backlight control */
  58         ENTRY("80862289", "2", X86_MATCH(ATOM_AIRMONT), {
  59                         DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
  60                 }),
  61         /*
  62          * The INT0002 device is necessary to clear wakeup interrupt sources
  63          * on Cherry Trail devices, without it we get nobody cared IRQ msgs.
  64          */
  65         ENTRY("INT0002", "1", X86_MATCH(ATOM_AIRMONT), {}),
  66         /*
  67          * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
  68          * the touchscreen ACPI device until a certain time
  69          * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
  70          * *and* _STA has been called at least 3 times since.
  71          */
  72         ENTRY("SYNA7500", "1", X86_MATCH(HASWELL_L), {
  73                 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
  74                 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
  75               }),
  76         ENTRY("SYNA7500", "1", X86_MATCH(HASWELL_L), {
  77                 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
  78                 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
  79               }),
  80
  81         /*
  82          * The GPD win BIOS dated 20170221 has disabled the accelerometer, the
  83          * drivers sometimes cause crashes under Windows and this is how the
  84          * manufacturer has solved this :| Note that the the DMI data is less
  85          * generic then it seems, a board_vendor of "AMI Corporation" is quite
  86          * rare and a board_name of "Default String" also is rare.
  87          *
  88          * Unfortunately the GPD pocket also uses these strings and its BIOS
  89          * was copy-pasted from the GPD win, so it has a disabled KIOX000A
  90          * node which we should not enable, thus we also check the BIOS date.
  91          */
  92         ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
  93                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
  94                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
  95                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
  96                 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
  97               }),
  98         ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
  99                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 100                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
 101                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
 102                 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
 103               }),
 104         ENTRY("KIOX000A", "1", X86_MATCH(ATOM_AIRMONT), {
 105                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 106                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
 107                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
 108                 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
 109               }),
 110 };
 111
 112 bool acpi_device_always_present(struct acpi_device *adev)
 113 {
 114         bool ret = false;
 115         unsigned int i;
 116
 117         for (i = 0; i < ARRAY_SIZE(always_present_ids); i++) {
 118                 if (acpi_match_device_ids(adev, always_present_ids[i].hid))
 119                         continue;
 120
 121                 if (!adev->pnp.unique_id ||
 122                     strcmp(adev->pnp.unique_id, always_present_ids[i].uid))
 123                         continue;
 124
 125                 if (!x86_match_cpu(always_present_ids[i].cpu_ids))
 126                         continue;
 127
 128                 if (always_present_ids[i].dmi_ids[0].matches[0].slot &&
 129                     !dmi_check_system(always_present_ids[i].dmi_ids))
 130                         continue;
 131
 132                 ret = true;
 133                 break;
 134         }
 135
 136         return ret;
 137 }