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 .callback = dmi_disable_osi_vista, 197 .ident = "Sony VGN-NS10J_S", 198 .matches = { 199 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 200 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"), 201 }, 202 }, 203 { 204 .callback = dmi_disable_osi_vista, 205 .ident = "Sony VGN-SR290J", 206 .matches = { 207 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), 208 DMI_MATCH(DMI_PRODUCT_NAME, "Sony VGN-SR290J"), 209 }, 210 }, 211 212 /* 213 * BIOS invocation of _OSI(Linux) is almost always a BIOS bug. 214 * Linux ignores it, except for the machines enumerated below. 215 */ 216 217 /* 218 * Lenovo has a mix of systems OSI(Linux) situations 219 * and thus we can not wildcard the vendor. 220 * 221 * _OSI(Linux) helps sound 222 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"), 223 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"), 224 * _OSI(Linux) has Linux specific hooks 225 * DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"), 226 * _OSI(Linux) is a NOP: 227 * DMI_MATCH(DMI_PRODUCT_VERSION, "3000 N100"), 228 * DMI_MATCH(DMI_PRODUCT_VERSION, "LENOVO3000 V100"), 229 */ 230 { 231 .callback = dmi_enable_osi_linux, 232 .ident = "Lenovo ThinkPad R61", 233 .matches = { 234 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 235 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad R61"), 236 }, 237 }, 238 { 239 .callback = dmi_enable_osi_linux, 240 .ident = "Lenovo ThinkPad T61", 241 .matches = { 242 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 243 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T61"), 244 }, 245 }, 246 { 247 .callback = dmi_enable_osi_linux, 248 .ident = "Lenovo ThinkPad X61", 249 .matches = { 250 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 251 DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X61"), 252 }, 253 }, 254 {} 255 }; 256 257 #endif /* CONFIG_DMI */ 258