1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  blacklist.c
4  *
5  *  Check to see if the given machine has a known bad ACPI BIOS
6  *  or if the BIOS is too old.
7  *  Check given machine against acpi_rev_dmi_table[].
8  *
9  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
10  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
11  */
12 
13 #define pr_fmt(fmt) "ACPI: " fmt
14 
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/acpi.h>
18 #include <linux/dmi.h>
19 
20 #include "internal.h"
21 
22 #ifdef CONFIG_DMI
23 static const struct dmi_system_id acpi_rev_dmi_table[] __initconst;
24 #endif
25 
26 /*
27  * POLICY: If *anything* doesn't work, put it on the blacklist.
28  *	   If they are critical errors, mark it critical, and abort driver load.
29  */
30 static struct acpi_platform_list acpi_blacklist[] __initdata = {
31 	/* Compaq Presario 1700 */
32 	{"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
33 	 "Multiple problems", 1},
34 	/* Sony FX120, FX140, FX150? */
35 	{"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
36 	 "ACPI driver problem", 1},
37 	/* Compaq Presario 800, Insyde BIOS */
38 	{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
39 	 "Does not use _REG to protect EC OpRegions", 1},
40 	/* IBM 600E - _ADR should return 7, but it returns 1 */
41 	{"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
42 	 "Incorrect _ADR", 1},
43 
44 	{ }
45 };
46 
acpi_blacklisted(void)47 int __init acpi_blacklisted(void)
48 {
49 	int i;
50 	int blacklisted = 0;
51 
52 	i = acpi_match_platform_list(acpi_blacklist);
53 	if (i >= 0) {
54 		pr_err("Vendor \"%6.6s\" System \"%8.8s\" Revision 0x%x has a known ACPI BIOS problem.\n",
55 		       acpi_blacklist[i].oem_id,
56 		       acpi_blacklist[i].oem_table_id,
57 		       acpi_blacklist[i].oem_revision);
58 
59 		pr_err("Reason: %s. This is a %s error\n",
60 		       acpi_blacklist[i].reason,
61 		       (acpi_blacklist[i].data ?
62 			"non-recoverable" : "recoverable"));
63 
64 		blacklisted = acpi_blacklist[i].data;
65 	}
66 
67 	(void)early_acpi_osi_init();
68 #ifdef CONFIG_DMI
69 	dmi_check_system(acpi_rev_dmi_table);
70 #endif
71 
72 	return blacklisted;
73 }
74 #ifdef CONFIG_DMI
75 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
dmi_enable_rev_override(const struct dmi_system_id * d)76 static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
77 {
78 	pr_notice("DMI detected: %s (force ACPI _REV to 5)\n", d->ident);
79 	acpi_rev_override_setup(NULL);
80 	return 0;
81 }
82 #endif
83 
84 static const struct dmi_system_id acpi_rev_dmi_table[] __initconst = {
85 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
86 	/*
87 	 * DELL XPS 13 (2015) switches sound between HDA and I2S
88 	 * depending on the ACPI _REV callback. If userspace supports
89 	 * I2S sufficiently (or if you do not care about sound), you
90 	 * can safely disable this quirk.
91 	 */
92 	{
93 	 .callback = dmi_enable_rev_override,
94 	 .ident = "DELL XPS 13 (2015)",
95 	 .matches = {
96 		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
97 		      DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
98 		},
99 	},
100 	{
101 	 .callback = dmi_enable_rev_override,
102 	 .ident = "DELL Precision 5520",
103 	 .matches = {
104 		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
105 		      DMI_MATCH(DMI_PRODUCT_NAME, "Precision 5520"),
106 		},
107 	},
108 	{
109 	 .callback = dmi_enable_rev_override,
110 	 .ident = "DELL Precision 3520",
111 	 .matches = {
112 		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
113 		      DMI_MATCH(DMI_PRODUCT_NAME, "Precision 3520"),
114 		},
115 	},
116 	/*
117 	 * Resolves a quirk with the Dell Latitude 3350 that
118 	 * causes the ethernet adapter to not function.
119 	 */
120 	{
121 	 .callback = dmi_enable_rev_override,
122 	 .ident = "DELL Latitude 3350",
123 	 .matches = {
124 		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
125 		      DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 3350"),
126 		},
127 	},
128 	{
129 	 .callback = dmi_enable_rev_override,
130 	 .ident = "DELL Inspiron 7537",
131 	 .matches = {
132 		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
133 		      DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
134 		},
135 	},
136 #endif
137 	{}
138 };
139 
140 #endif /* CONFIG_DMI */
141