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   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 */