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; 84 85 /* Doesn't exist? Likely an old system */ 86 if (!dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL)) { 87 printk(KERN_ERR PREFIX "no DMI BIOS year, " 88 "acpi=force is required to enable ACPI\n" ); 89 return 1; 90 } 91 /* 0? Likely a buggy new BIOS */ 92 if (year == 0) { 93 printk(KERN_ERR PREFIX "DMI BIOS year==0, " 94 "assuming ACPI-capable machine\n" ); 95 return 0; 96 } 97 if (year < CONFIG_ACPI_BLACKLIST_YEAR) { 98 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), " 99 "acpi=force is required to enable ACPI\n", 100 year, CONFIG_ACPI_BLACKLIST_YEAR); 101 return 1; 102 } 103 return 0; 104 } 105 #else 106 static inline int blacklist_by_year(void) 107 { 108 return 0; 109 } 110 #endif 111 112 int __init acpi_blacklisted(void) 113 { 114 int i = 0; 115 int blacklisted = 0; 116 struct acpi_table_header table_header; 117 118 while (acpi_blacklist[i].oem_id[0] != '\0') { 119 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) { 120 i++; 121 continue; 122 } 123 124 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) { 125 i++; 126 continue; 127 } 128 129 if (strncmp 130 (acpi_blacklist[i].oem_table_id, table_header.oem_table_id, 131 8)) { 132 i++; 133 continue; 134 } 135 136 if ((acpi_blacklist[i].oem_revision_predicate == all_versions) 137 || (acpi_blacklist[i].oem_revision_predicate == 138 less_than_or_equal 139 && table_header.oem_revision <= 140 acpi_blacklist[i].oem_revision) 141 || (acpi_blacklist[i].oem_revision_predicate == 142 greater_than_or_equal 143 && table_header.oem_revision >= 144 acpi_blacklist[i].oem_revision) 145 || (acpi_blacklist[i].oem_revision_predicate == equal 146 && table_header.oem_revision == 147 acpi_blacklist[i].oem_revision)) { 148 149 printk(KERN_ERR PREFIX 150 "Vendor \"%6.6s\" System \"%8.8s\" " 151 "Revision 0x%x has a known ACPI BIOS problem.\n", 152 acpi_blacklist[i].oem_id, 153 acpi_blacklist[i].oem_table_id, 154 acpi_blacklist[i].oem_revision); 155 156 printk(KERN_ERR PREFIX 157 "Reason: %s. This is a %s error\n", 158 acpi_blacklist[i].reason, 159 (acpi_blacklist[i]. 160 is_critical_error ? "non-recoverable" : 161 "recoverable")); 162 163 blacklisted = acpi_blacklist[i].is_critical_error; 164 break; 165 } else { 166 i++; 167 } 168 } 169 170 blacklisted += blacklist_by_year(); 171 172 dmi_check_system(acpi_osi_dmi_table); 173 174 return blacklisted; 175 } 176 #ifdef CONFIG_DMI 177 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d) 178 { 179 acpi_dmi_osi_linux(1, d); /* enable */ 180 return 0; 181 } 182 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d) 183 { 184 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 185 acpi_osi_setup("!Windows 2006"); 186 return 0; 187 } 188 static int __init dmi_disable_osi_win7(const struct dmi_system_id *d) 189 { 190 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 191 acpi_osi_setup("!Windows 2009"); 192 return 0; 193 } 194 195 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = { 196 { 197 .callback = dmi_disable_osi_vista, 198 .ident = "Fujitsu Siemens", 199 .matches = { 200 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 201 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"), 202 }, 203 }, 204 { 205 .callback = dmi_disable_osi_vista, 206 .ident = "Sony VGN-NS10J_S", 207 .matches = { 208 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 209 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"), 210 }, 211 }, 212 { 213 .callback = dmi_disable_osi_vista, 214 .ident = "Sony VGN-SR290J", 215 .matches = { 216 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 217 DMI_MATCH(DMI_PRODUCT_NAME, "Sony VGN-SR290J"), 218 }, 219 }, 220 { 221 .callback = dmi_disable_osi_win7, 222 .ident = "ASUS K50IJ", 223 .matches = { 224 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 225 DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"), 226 }, 227 }, 228 229 /* 230 * BIOS invocation of _OSI(Linux) is almost always a BIOS bug. 231 * Linux ignores it, except for the machines enumerated below. 232 */ 233 234 /* 235 * Lenovo has a mix of systems OSI(Linux) situations 236 * and thus we can not wildcard the vendor. 237 * 238 * _OSI(Linux) helps sound 239 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"), 240 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"), 241 * T400, T500 242 * _OSI(Linux) has Linux specific hooks 243 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"), 244 * _OSI(Linux) is a NOP: 245 * DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"), 246 * DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"), 247 */ 248 { 249 .callback = dmi_enable_osi_linux, 250 .ident = "Lenovo ThinkPad R61", 251 .matches = { 252 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 253 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"), 254 }, 255 }, 256 { 257 .callback = dmi_enable_osi_linux, 258 .ident = "Lenovo ThinkPad T61", 259 .matches = { 260 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 261 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"), 262 }, 263 }, 264 { 265 .callback = dmi_enable_osi_linux, 266 .ident = "Lenovo ThinkPad X61", 267 .matches = { 268 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 269 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"), 270 }, 271 }, 272 { 273 .callback = dmi_enable_osi_linux, 274 .ident = "Lenovo ThinkPad T400", 275 .matches = { 276 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 277 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T400"), 278 }, 279 }, 280 { 281 .callback = dmi_enable_osi_linux, 282 .ident = "Lenovo ThinkPad T500", 283 .matches = { 284 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 285 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T500"), 286 }, 287 }, 288 {} 289 }; 290 291 #endif /* CONFIG_DMI */ 292