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 enum acpi_blacklist_predicates {
  38         all_versions,
  39         less_than_or_equal,
  40         equal,
  41         greater_than_or_equal,
  42 };
  43
  44 struct acpi_blacklist_item {
  45         char oem_id[7];
  46         char oem_table_id[9];
  47         u32 oem_revision;
  48         char *table;
  49         enum acpi_blacklist_predicates oem_revision_predicate;
  50         char *reason;
  51         u32 is_critical_error;
  52 };
  53
  54 static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
  55
  56 /*
  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.
  59  */
  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,
  72          "Incorrect _ADR", 1},
  73
  74         {""}
  75 };
  76
  77 #if     CONFIG_ACPI_BLACKLIST_YEAR
  78
  79 static int __init blacklist_by_year(void)
  80 {
  81         int year;
  82
  83         /* Doesn't exist? Likely an old system */
  84         if (!dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL)) {
  85                 printk(KERN_ERR PREFIX "no DMI BIOS year, "
  86                         "acpi=force is required to enable ACPI\n" );
  87                 return 1;
  88         }
  89         /* 0? Likely a buggy new BIOS */
  90         if (year == 0) {
  91                 printk(KERN_ERR PREFIX "DMI BIOS year==0, "
  92                         "assuming ACPI-capable machine\n" );
  93                 return 0;
  94         }
  95         if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
  96                 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
  97                        "acpi=force is required to enable ACPI\n",
  98                        year, CONFIG_ACPI_BLACKLIST_YEAR);
  99                 return 1;
 100         }
 101         return 0;
 102 }
 103 #else
 104 static inline int blacklist_by_year(void)
 105 {
 106         return 0;
 107 }
 108 #endif
 109
 110 int __init acpi_blacklisted(void)
 111 {
 112         int i = 0;
 113         int blacklisted = 0;
 114         struct acpi_table_header table_header;
 115
 116         while (acpi_blacklist[i].oem_id[0] != '\0') {
 117                 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
 118                         i++;
 119                         continue;
 120                 }
 121
 122                 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
 123                         i++;
 124                         continue;
 125                 }
 126
 127                 if (strncmp
 128                     (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
 129                      8)) {
 130                         i++;
 131                         continue;
 132                 }
 133
 134                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
 135                     || (acpi_blacklist[i].oem_revision_predicate ==
 136                         less_than_or_equal
 137                         && table_header.oem_revision <=
 138                         acpi_blacklist[i].oem_revision)
 139                     || (acpi_blacklist[i].oem_revision_predicate ==
 140                         greater_than_or_equal
 141                         && table_header.oem_revision >=
 142                         acpi_blacklist[i].oem_revision)
 143                     || (acpi_blacklist[i].oem_revision_predicate == equal
 144                         && table_header.oem_revision ==
 145                         acpi_blacklist[i].oem_revision)) {
 146
 147                         printk(KERN_ERR PREFIX
 148                                "Vendor \"%6.6s\" System \"%8.8s\" "
 149                                "Revision 0x%x has a known ACPI BIOS problem.\n",
 150                                acpi_blacklist[i].oem_id,
 151                                acpi_blacklist[i].oem_table_id,
 152                                acpi_blacklist[i].oem_revision);
 153
 154                         printk(KERN_ERR PREFIX
 155                                "Reason: %s. This is a %s error\n",
 156                                acpi_blacklist[i].reason,
 157                                (acpi_blacklist[i].
 158                                 is_critical_error ? "non-recoverable" :
 159                                 "recoverable"));
 160
 161                         blacklisted = acpi_blacklist[i].is_critical_error;
 162                         break;
 163                 } else {
 164                         i++;
 165                 }
 166         }
 167
 168         blacklisted += blacklist_by_year();
 169
 170         dmi_check_system(acpi_osi_dmi_table);
 171
 172         return blacklisted;
 173 }
 174 #ifdef CONFIG_DMI
 175 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
 176 {
 177         acpi_dmi_osi_linux(1, d);       /* enable */
 178         return 0;
 179 }
 180 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
 181 {
 182         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
 183         acpi_osi_setup("!Windows 2006");
 184         return 0;
 185 }
 186
 187 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
 188         {
 189         .callback = dmi_disable_osi_vista,
 190         .ident = "Fujitsu Siemens",
 191         .matches = {
 192                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 193                      DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
 194                 },
 195         },
 196         {
 197         .callback = dmi_disable_osi_vista,
 198         .ident = "Sony VGN-NS10J_S",
 199         .matches = {
 200                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 201                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
 202                 },
 203         },
 204         {
 205         .callback = dmi_disable_osi_vista,
 206         .ident = "Sony VGN-SR290J",
 207         .matches = {
 208                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
 209                      DMI_MATCH(DMI_PRODUCT_NAME, "Sony VGN-SR290J"),
 210                 },
 211         },
 212
 213         /*
 214          * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
 215          * Linux ignores it, except for the machines enumerated below.
 216          */
 217
 218         /*
 219          * Lenovo has a mix of systems OSI(Linux) situations
 220          * and thus we can not wildcard the vendor.
 221          *
 222          * _OSI(Linux) helps sound
 223          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
 224          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
 225          * _OSI(Linux) has Linux specific hooks
 226          * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
 227          * _OSI(Linux) is a NOP:
 228          * DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"),
 229          * DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"),
 230          */
 231         {
 232         .callback = dmi_enable_osi_linux,
 233         .ident = "Lenovo ThinkPad R61",
 234         .matches = {
 235                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 236                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"),
 237                 },
 238         },
 239         {
 240         .callback = dmi_enable_osi_linux,
 241         .ident = "Lenovo ThinkPad T61",
 242         .matches = {
 243                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 244                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"),
 245                 },
 246         },
 247         {
 248         .callback = dmi_enable_osi_linux,
 249         .ident = "Lenovo ThinkPad X61",
 250         .matches = {
 251                      DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 252                      DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"),
 253                 },
 254         },
 255         {}
 256 };
 257
 258 #endif /* CONFIG_DMI */