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_rev_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  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/acpi.h>
  29 #include <linux/dmi.h>
  30
  31 #include "internal.h"
  32
  33 enum acpi_blacklist_predicates {
  34         all_versions,
  35         less_than_or_equal,
  36         equal,
  37         greater_than_or_equal,
  38 };
  39
  40 struct acpi_blacklist_item {
  41         char oem_id[7];
  42         char oem_table_id[9];
  43         u32 oem_revision;
  44         char *table;
  45         enum acpi_blacklist_predicates oem_revision_predicate;
  46         char *reason;
  47         u32 is_critical_error;
  48 };
  49
  50 static struct dmi_system_id acpi_rev_dmi_table[] __initdata;
  51
  52 /*
  53  * POLICY: If *anything* doesn't work, put it on the blacklist.
  54  *         If they are critical errors, mark it critical, and abort driver load.
  55  */
  56 static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
  57         /* Compaq Presario 1700 */
  58         {"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
  59          "Multiple problems", 1},
  60         /* Sony FX120, FX140, FX150? */
  61         {"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
  62          "ACPI driver problem", 1},
  63         /* Compaq Presario 800, Insyde BIOS */
  64         {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
  65          "Does not use _REG to protect EC OpRegions", 1},
  66         /* IBM 600E - _ADR should return 7, but it returns 1 */
  67         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
  68          "Incorrect _ADR", 1},
  69
  70         {""}
  71 };
  72
  73 int __init acpi_blacklisted(void)
  74 {
  75         int i = 0;
  76         int blacklisted = 0;
  77         struct acpi_table_header table_header;
  78
  79         while (acpi_blacklist[i].oem_id[0] != '\0') {
  80                 if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
  81                         i++;
  82                         continue;
  83                 }
  84
  85                 if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
  86                         i++;
  87                         continue;
  88                 }
  89
  90                 if (strncmp
  91                     (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
  92                      8)) {
  93                         i++;
  94                         continue;
  95                 }
  96
  97                 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
  98                     || (acpi_blacklist[i].oem_revision_predicate ==
  99                         less_than_or_equal
 100                         && table_header.oem_revision <=
 101                         acpi_blacklist[i].oem_revision)
 102                     || (acpi_blacklist[i].oem_revision_predicate ==
 103                         greater_than_or_equal
 104                         && table_header.oem_revision >=
 105                         acpi_blacklist[i].oem_revision)
 106                     || (acpi_blacklist[i].oem_revision_predicate == equal
 107                         && table_header.oem_revision ==
 108                         acpi_blacklist[i].oem_revision)) {
 109
 110                         printk(KERN_ERR PREFIX
 111                                "Vendor \"%6.6s\" System \"%8.8s\" "
 112                                "Revision 0x%x has a known ACPI BIOS problem.\n",
 113                                acpi_blacklist[i].oem_id,
 114                                acpi_blacklist[i].oem_table_id,
 115                                acpi_blacklist[i].oem_revision);
 116
 117                         printk(KERN_ERR PREFIX
 118                                "Reason: %s. This is a %s error\n",
 119                                acpi_blacklist[i].reason,
 120                                (acpi_blacklist[i].
 121                                 is_critical_error ? "non-recoverable" :
 122                                 "recoverable"));
 123
 124                         blacklisted = acpi_blacklist[i].is_critical_error;
 125                         break;
 126                 } else {
 127                         i++;
 128                 }
 129         }
 130
 131         (void)early_acpi_osi_init();
 132         dmi_check_system(acpi_rev_dmi_table);
 133
 134         return blacklisted;
 135 }
 136 #ifdef CONFIG_DMI
 137 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
 138 static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
 139 {
 140         printk(KERN_NOTICE PREFIX "DMI detected: %s (force ACPI _REV to 5)\n",
 141                d->ident);
 142         acpi_rev_override_setup(NULL);
 143         return 0;
 144 }
 145 #endif
 146
 147 static struct dmi_system_id acpi_rev_dmi_table[] __initdata = {
 148 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
 149         /*
 150          * DELL XPS 13 (2015) switches sound between HDA and I2S
 151          * depending on the ACPI _REV callback. If userspace supports
 152          * I2S sufficiently (or if you do not care about sound), you
 153          * can safely disable this quirk.
 154          */
 155         {
 156          .callback = dmi_enable_rev_override,
 157          .ident = "DELL XPS 13 (2015)",
 158          .matches = {
 159                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 160                       DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
 161                 },
 162         },
 163 #endif
 164         {}
 165 };
 166
 167 #endif /* CONFIG_DMI */