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 * Likewise sometimes some not-actually present devices are sometimes 26 * reported as present, which may cause issues. 27 * 28 * We work around this by using the below quirk list to override the status 29 * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0). 30 * Note this MUST only be done for devices where this is safe. 31 * 32 * This status overriding is limited to specific CPU (SoC) models both to 33 * avoid potentially causing trouble on other models and because some HIDs 34 * are re-used on different SoCs for completely different devices. 35 */ 36struct override_status_id { 37 struct acpi_device_id hid[2]; 38 struct x86_cpu_id cpu_ids[2]; 39 struct dmi_system_id dmi_ids[2]; /* Optional */ 40 const char *uid; 41 const char *path; 42 unsigned long long status; 43}; 44 45#define ENTRY(status, hid, uid, path, cpu_model, dmi...) { \ 46 { { hid, }, {} }, \ 47 { X86_MATCH_INTEL_FAM6_MODEL(cpu_model, NULL), {} }, \ 48 { { .matches = dmi }, {} }, \ 49 uid, \ 50 path, \ 51 status, \ 52} 53 54#define PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 55 ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_model, dmi) 56 57#define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_model, dmi...) \ 58 ENTRY(0, hid, uid, NULL, cpu_model, dmi) 59 60#define PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 61 ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_model, dmi) 62 63#define NOT_PRESENT_ENTRY_PATH(path, cpu_model, dmi...) \ 64 ENTRY(0, "", NULL, path, cpu_model, dmi) 65 66static const struct override_status_id override_status_ids[] = { 67 /* 68 * Bay / Cherry Trail PWM directly poked by GPU driver in win10, 69 * but Linux uses a separate PWM driver, harmless if not used. 70 */ 71 PRESENT_ENTRY_HID("80860F09", "1", ATOM_SILVERMONT, {}), 72 PRESENT_ENTRY_HID("80862288", "1", ATOM_AIRMONT, {}), 73 74 /* 75 * The INT0002 device is necessary to clear wakeup interrupt sources 76 * on Cherry Trail devices, without it we get nobody cared IRQ msgs. 77 */ 78 PRESENT_ENTRY_HID("INT0002", "1", ATOM_AIRMONT, {}), 79 /* 80 * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides 81 * the touchscreen ACPI device until a certain time 82 * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed 83 * *and* _STA has been called at least 3 times since. 84 */ 85 PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { 86 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 87 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), 88 }), 89 PRESENT_ENTRY_HID("SYNA7500", "1", HASWELL_L, { 90 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 91 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"), 92 }), 93 94 /* 95 * The GPD win BIOS dated 20170221 has disabled the accelerometer, the 96 * drivers sometimes cause crashes under Windows and this is how the 97 * manufacturer has solved this :| The DMI match may not seem unique, 98 * but it is. In the 67000+ DMI decode dumps from linux-hardware.org 99 * only 116 have board_vendor set to "AMI Corporation" and of those 116 100 * only the GPD win and pocket entries' board_name is "Default string". 101 * 102 * Unfortunately the GPD pocket also uses these strings and its BIOS 103 * was copy-pasted from the GPD win, so it has a disabled KIOX000A 104 * node which we should not enable, thus we also check the BIOS date. 105 */ 106 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 107 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 108 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 109 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 110 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017") 111 }), 112 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 113 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 114 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 115 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 116 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017") 117 }), 118 PRESENT_ENTRY_HID("KIOX000A", "1", ATOM_AIRMONT, { 119 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 120 DMI_MATCH(DMI_BOARD_NAME, "Default string"), 121 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"), 122 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017") 123 }), 124 125 /* 126 * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO 127 * mmc controller enabled and that has a child-device which _PS3 128 * method sets a GPIO causing the PCI wifi card to turn off. 129 * See above remark about uniqueness of the DMI match. 130 */ 131 NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", ATOM_AIRMONT, { 132 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"), 133 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"), 134 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"), 135 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"), 136 }), 137}; 138 139bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status) 140{ 141 bool ret = false; 142 unsigned int i; 143 144 for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) { 145 if (!x86_match_cpu(override_status_ids[i].cpu_ids)) 146 continue; 147 148 if (override_status_ids[i].dmi_ids[0].matches[0].slot && 149 !dmi_check_system(override_status_ids[i].dmi_ids)) 150 continue; 151 152 if (override_status_ids[i].path) { 153 struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL }; 154 bool match; 155 156 if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path)) 157 continue; 158 159 match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0; 160 kfree(path.pointer); 161 162 if (!match) 163 continue; 164 } else { 165 if (acpi_match_device_ids(adev, override_status_ids[i].hid)) 166 continue; 167 168 if (!adev->pnp.unique_id || 169 strcmp(adev->pnp.unique_id, override_status_ids[i].uid)) 170 continue; 171 } 172 173 *status = override_status_ids[i].status; 174 ret = true; 175 break; 176 } 177 178 return ret; 179} 180