| 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 */ |