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 */ 259