19152ea2b104071fe35d5e10681b9d333fcde803
[linux-2.6.git] / drivers / acpi / blacklist.c
1 /*
2  *  blacklist.c
3  *
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[].
7  *
8  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
9  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
10  *
11  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12  *
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.
17  *
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.
22  *
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.
26  *
27  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28  */
29
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>
36
37 #include "internal.h"
38
39 enum acpi_blacklist_predicates {
40         all_versions,
41         less_than_or_equal,
42         equal,
43         greater_than_or_equal,
44 };
45
46 struct acpi_blacklist_item {
47         char oem_id[7];
48         char oem_table_id[9];
49         u32 oem_revision;
50         char *table;
51         enum acpi_blacklist_predicates oem_revision_predicate;
52         char *reason;
53         u32 is_critical_error;
54 };
55
56 static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
57
58 /*
59  * POLICY: If *anything* doesn't work, put it on the blacklist.
60  *         If they are critical errors, mark it critical, and abort driver load.
61  */
62 static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
63         /* Compaq Presario 1700 */
64         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
65          "Multiple problems", 1},
66         /* Sony FX120, FX140, FX150? */
67         {"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
68          "ACPI driver problem", 1},
69         /* Compaq Presario 800, Insyde BIOS */
70         {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
71          "Does not use _REG to protect EC OpRegions", 1},
72         /* IBM 600E - _ADR should return 7, but it returns 1 */
73         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
74          "Incorrect _ADR", 1},
75
76         {""}
77 };
78
79 #if     CONFIG_ACPI_BLACKLIST_YEAR
80
81 static int __init blacklist_by_year(void)
82 {
83         int year = dmi_get_year(DMI_BIOS_DATE);
84         /* Doesn't exist? Likely an old system */
85         if (year == -1) {
86                 printk(KERN_ERR PREFIX "no DMI BIOS year, "
87                         "acpi=force is required to enable ACPI\n" );
88                 return 1;
89         }
90         /* 0? Likely a buggy new BIOS */
91         if (year == 0) {
92                 printk(KERN_ERR PREFIX "DMI BIOS year==0, "
93                         "assuming ACPI-capable machine\n" );
94                 return 0;
95         }
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);
100                 return 1;
101         }
102         return 0;
103 }
104 #else
105 static inline int blacklist_by_year(void)
106 {
107         return 0;
108 }
109 #endif
110
111 int __init acpi_blacklisted(void)
112 {
113         int i = 0;
114         int blacklisted = 0;
115         struct acpi_table_header table_header;
116
117         while (acpi_blacklist[i].oem_id[0] != '\0') {
118                 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
119                         i++;
120                         continue;
121                 }
122
123                 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
124                         i++;
125                         continue;
126                 }
127
128                 if (strncmp
129                     (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
130                      8)) {
131                         i++;
132                         continue;
133                 }
134
135                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
136                     || (acpi_blacklist[i].oem_revision_predicate ==
137                         less_than_or_equal
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)) {
147
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);
154
155                         printk(KERN_ERR PREFIX
156                                "Reason: %s. This is a %s error\n",
157                                acpi_blacklist[i].reason,
158                                (acpi_blacklist[i].
159                                 is_critical_error ? "non-recoverable" :
160                                 "recoverable"));
161
162                         blacklisted = acpi_blacklist[i].is_critical_error;
163                         break;
164                 } else {
165                         i++;
166                 }
167         }
168
169         blacklisted += blacklist_by_year();
170
171         dmi_check_system(acpi_osi_dmi_table);
172
173         return blacklisted;
174 }
175 #ifdef CONFIG_DMI
176 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
177 {
178         acpi_dmi_osi_linux(1, d);       /* enable */
179         return 0;
180 }
181 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
182 {
183         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
184         acpi_osi_setup("!Windows 2006");
185         return 0;
186 }
187
188 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
189         {
190         .callback = dmi_disable_osi_vista,
191         .ident = "Fujitsu Siemens",
192         .matches = {
193                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
194                      DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
195                 },
196         },
197         {
198         .callback = dmi_disable_osi_vista,
199         .ident = "Sony VGN-NS10J_S",
200         .matches = {
201                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
202                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
203                 },
204         },
205         {
206         .callback = dmi_disable_osi_vista,
207         .ident = "Sony VGN-SR290J",
208         .matches = {
209                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
210                      DMI_MATCH(DMI_PRODUCT_NAME, "Sony VGN-SR290J"),
211                 },
212         },
213
214         /*
215          * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
216          * Linux ignores it, except for the machines enumerated below.
217          */
218
219         /*
220          * Lenovo has a mix of systems OSI(Linux) situations
221          * and thus we can not wildcard the vendor.
222          *
223          * _OSI(Linux) helps sound
224          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
225          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
226          * _OSI(Linux) has Linux specific hooks
227          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
228          * _OSI(Linux) is a NOP:
229          * DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"),
230          * DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"),
231          */
232         {
233         .callback = dmi_enable_osi_linux,
234         .ident = "Lenovo ThinkPad R61",
235         .matches = {
236                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
237                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
238                 },
239         },
240         {
241         .callback = dmi_enable_osi_linux,
242         .ident = "Lenovo ThinkPad T61",
243         .matches = {
244                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
245                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
246                 },
247         },
248         {
249         .callback = dmi_enable_osi_linux,
250         .ident = "Lenovo ThinkPad X61",
251         .matches = {
252                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
253                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
254                 },
255         },
256         {}
257 };
258
259 #endif /* CONFIG_DMI */