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