4 * Check to see if the given machine has a known bad ACPI BIOS
5 * or if the BIOS is too old.
6 * Check given machine against acpi_osi_dmi_table[].
8 * Copyright (C) 2004 Len Brown <len.brown@intel.com>
9 * Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
11 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or (at
16 * your option) any later version.
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
27 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/acpi.h>
34 #include <acpi/acpi_bus.h>
35 #include <linux/dmi.h>
37 enum acpi_blacklist_predicates {
41 greater_than_or_equal,
44 struct acpi_blacklist_item {
49 enum acpi_blacklist_predicates oem_revision_predicate;
51 u32 is_critical_error;
54 static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
57 * POLICY: If *anything* doesn't work, put it on the blacklist.
58 * If they are critical errors, mark it critical, and abort driver load.
60 static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
61 /* Compaq Presario 1700 */
62 {"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
63 "Multiple problems", 1},
64 /* Sony FX120, FX140, FX150? */
65 {"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
66 "ACPI driver problem", 1},
67 /* Compaq Presario 800, Insyde BIOS */
68 {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
69 "Does not use _REG to protect EC OpRegions", 1},
70 /* IBM 600E - _ADR should return 7, but it returns 1 */
71 {"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
73 {"ASUS\0\0", "P2B-S ", 0, ACPI_SIG_DSDT, all_versions,
74 "Bogus PCI routing", 1},
79 #if CONFIG_ACPI_BLACKLIST_YEAR
81 static int __init blacklist_by_year(void)
83 int year = dmi_get_year(DMI_BIOS_DATE);
84 /* Doesn't exist? Likely an old system */
86 printk(KERN_ERR PREFIX "no DMI BIOS year, "
87 "acpi=force is required to enable ACPI\n" );
90 /* 0? Likely a buggy new BIOS */
92 printk(KERN_ERR PREFIX "DMI BIOS year==0, "
93 "assuming ACPI-capable machine\n" );
96 if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
97 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
98 "acpi=force is required to enable ACPI\n",
99 year, CONFIG_ACPI_BLACKLIST_YEAR);
105 static inline int blacklist_by_year(void)
111 int __init acpi_blacklisted(void)
115 struct acpi_table_header table_header;
117 while (acpi_blacklist[i].oem_id[0] != '\0') {
118 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
123 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
129 (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
135 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
136 || (acpi_blacklist[i].oem_revision_predicate ==
138 && table_header.oem_revision <=
139 acpi_blacklist[i].oem_revision)
140 || (acpi_blacklist[i].oem_revision_predicate ==
141 greater_than_or_equal
142 && table_header.oem_revision >=
143 acpi_blacklist[i].oem_revision)
144 || (acpi_blacklist[i].oem_revision_predicate == equal
145 && table_header.oem_revision ==
146 acpi_blacklist[i].oem_revision)) {
148 printk(KERN_ERR PREFIX
149 "Vendor \"%6.6s\" System \"%8.8s\" "
150 "Revision 0x%x has a known ACPI BIOS problem.\n",
151 acpi_blacklist[i].oem_id,
152 acpi_blacklist[i].oem_table_id,
153 acpi_blacklist[i].oem_revision);
155 printk(KERN_ERR PREFIX
156 "Reason: %s. This is a %s error\n",
157 acpi_blacklist[i].reason,
159 is_critical_error ? "non-recoverable" :
162 blacklisted = acpi_blacklist[i].is_critical_error;
169 blacklisted += blacklist_by_year();
171 dmi_check_system(acpi_osi_dmi_table);
176 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
178 acpi_dmi_osi_linux(1, d); /* enable */
182 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
184 * _OSI(Linux) helps sound
185 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
186 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
189 .callback = dmi_enable_osi_linux,
190 .ident = "Lenovo ThinkPad R61",
192 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
193 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
197 .callback = dmi_enable_osi_linux,
198 .ident = "Lenovo ThinkPad T61",
200 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
201 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
207 #endif /* CONFIG_DMI */