ACPICA: minimal patch to integrate new tables into Linux
[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  *
7  *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
8  *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
9  *
10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11  *
12  *  This program is free software; you can redistribute it and/or modify
13  *  it under the terms of the GNU General Public License as published by
14  *  the Free Software Foundation; either version 2 of the License, or (at
15  *  your option) any later version.
16  *
17  *  This program is distributed in the hope that it will be useful, but
18  *  WITHOUT ANY WARRANTY; without even the implied warranty of
19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
20  *  General Public License for more details.
21  *
22  *  You should have received a copy of the GNU General Public License along
23  *  with this program; if not, write to the Free Software Foundation, Inc.,
24  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25  *
26  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27  */
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/acpi.h>
33 #include <acpi/acpi_bus.h>
34 #include <linux/dmi.h>
35
36 enum acpi_blacklist_predicates {
37         all_versions,
38         less_than_or_equal,
39         equal,
40         greater_than_or_equal,
41 };
42
43 struct acpi_blacklist_item {
44         char oem_id[7];
45         char oem_table_id[9];
46         u32 oem_revision;
47         char *table;
48         enum acpi_blacklist_predicates oem_revision_predicate;
49         char *reason;
50         u32 is_critical_error;
51 };
52
53 /*
54  * POLICY: If *anything* doesn't work, put it on the blacklist.
55  *         If they are critical errors, mark it critical, and abort driver load.
56  */
57 static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
58         /* Compaq Presario 1700 */
59         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
60          "Multiple problems", 1},
61         /* Sony FX120, FX140, FX150? */
62         {"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
63          "ACPI driver problem", 1},
64         /* Compaq Presario 800, Insyde BIOS */
65         {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
66          "Does not use _REG to protect EC OpRegions", 1},
67         /* IBM 600E - _ADR should return 7, but it returns 1 */
68         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
69          "Incorrect _ADR", 1},
70         {"ASUS\0\0", "P2B-S   ", 0, ACPI_SIG_DSDT, all_versions,
71          "Bogus PCI routing", 1},
72
73         {""}
74 };
75
76 #if     CONFIG_ACPI_BLACKLIST_YEAR
77
78 static int __init blacklist_by_year(void)
79 {
80         int year = dmi_get_year(DMI_BIOS_DATE);
81         /* Doesn't exist? Likely an old system */
82         if (year == -1) 
83                 return 1;
84         /* 0? Likely a buggy new BIOS */
85         if (year == 0)
86                 return 0;
87         if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
88                 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
89                        "acpi=force is required to enable ACPI\n",
90                        year, CONFIG_ACPI_BLACKLIST_YEAR);
91                 return 1;
92         }
93         return 0;
94 }
95 #else
96 static inline int blacklist_by_year(void)
97 {
98         return 0;
99 }
100 #endif
101
102 int __init acpi_blacklisted(void)
103 {
104         int i = 0;
105         int blacklisted = 0;
106         struct acpi_table_header *table_header;
107
108         while (acpi_blacklist[i].oem_id[0] != '\0') {
109                 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
110                         i++;
111                         continue;
112                 }
113
114                 if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
115                         i++;
116                         continue;
117                 }
118
119                 if (strncmp
120                     (acpi_blacklist[i].oem_table_id, table_header->oem_table_id,
121                      8)) {
122                         i++;
123                         continue;
124                 }
125
126                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
127                     || (acpi_blacklist[i].oem_revision_predicate ==
128                         less_than_or_equal
129                         && table_header->oem_revision <=
130                         acpi_blacklist[i].oem_revision)
131                     || (acpi_blacklist[i].oem_revision_predicate ==
132                         greater_than_or_equal
133                         && table_header->oem_revision >=
134                         acpi_blacklist[i].oem_revision)
135                     || (acpi_blacklist[i].oem_revision_predicate == equal
136                         && table_header->oem_revision ==
137                         acpi_blacklist[i].oem_revision)) {
138
139                         printk(KERN_ERR PREFIX
140                                "Vendor \"%6.6s\" System \"%8.8s\" "
141                                "Revision 0x%x has a known ACPI BIOS problem.\n",
142                                acpi_blacklist[i].oem_id,
143                                acpi_blacklist[i].oem_table_id,
144                                acpi_blacklist[i].oem_revision);
145
146                         printk(KERN_ERR PREFIX
147                                "Reason: %s. This is a %s error\n",
148                                acpi_blacklist[i].reason,
149                                (acpi_blacklist[i].
150                                 is_critical_error ? "non-recoverable" :
151                                 "recoverable"));
152
153                         blacklisted = acpi_blacklist[i].is_critical_error;
154                         break;
155                 } else {
156                         i++;
157                 }
158         }
159
160         blacklisted += blacklist_by_year();
161
162         return blacklisted;
163 }