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 */
36 struct 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
66 static 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
acpi_device_override_status(struct acpi_device * adev,unsigned long long * status)139 bool 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