/*
   *  blacklist.c
   *
   *  Check to see if the given machine has a known bad ACPI BIOS
   *  or if the BIOS is too old.

   *  Check given machine against acpi_rev_dmi_table[].

   *
   *  Copyright (C) 2004 Len Brown <len.brown@intel.com>
   *  Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or (at
   *  your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful, but
   *  WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  General Public License for more details.
   *

   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   */

  #include <linux/kernel.h>

  #include <linux/init.h>
  #include <linux/acpi.h>

  #include <linux/dmi.h>

  #include "internal.h"

  enum acpi_blacklist_predicates {
  	all_versions,
  	less_than_or_equal,
  	equal,
  	greater_than_or_equal,

  };

  struct acpi_blacklist_item {
  	char oem_id[7];
  	char oem_table_id[9];
  	u32 oem_revision;

  	char *table;

  	enum acpi_blacklist_predicates oem_revision_predicate;
  	char *reason;
  	u32 is_critical_error;

  };

  static struct dmi_system_id acpi_rev_dmi_table[] __initdata;

  /*
   * POLICY: If *anything* doesn't work, put it on the blacklist.
   *	   If they are critical errors, mark it critical, and abort driver load.
   */

  static struct acpi_blacklist_item acpi_blacklist[] __initdata = {

  	/* Compaq Presario 1700 */

  	{"PTLTD ", "  DSDT  ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,

  	 "Multiple problems", 1},

  	/* Sony FX120, FX140, FX150? */

  	{"SONY  ", "U0      ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,

  	 "ACPI driver problem", 1},

  	/* Compaq Presario 800, Insyde BIOS */

  	{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,

  	 "Does not use _REG to protect EC OpRegions", 1},

  	/* IBM 600E - _ADR should return 7, but it returns 1 */

  	{"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,

  	 "Incorrect _ADR", 1},

  
  	{""}
  };

  int __init acpi_blacklisted(void)

  {
  	int i = 0;
  	int blacklisted = 0;

  	struct acpi_table_header table_header;

  	while (acpi_blacklist[i].oem_id[0] != '\0') {

  		if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {

  			i++;
  			continue;
  		}

  		if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {

  			i++;
  			continue;
  		}

  		if (strncmp

  		    (acpi_blacklist[i].oem_table_id, table_header.oem_table_id,

  		     8)) {

  			i++;
  			continue;
  		}
  
  		if ((acpi_blacklist[i].oem_revision_predicate == all_versions)

  		    || (acpi_blacklist[i].oem_revision_predicate ==
  			less_than_or_equal

  			&& table_header.oem_revision <=

  			acpi_blacklist[i].oem_revision)
  		    || (acpi_blacklist[i].oem_revision_predicate ==
  			greater_than_or_equal

  			&& table_header.oem_revision >=

  			acpi_blacklist[i].oem_revision)

  		    || (acpi_blacklist[i].oem_revision_predicate == equal

  			&& table_header.oem_revision ==

  			acpi_blacklist[i].oem_revision)) {
  
  			printk(KERN_ERR PREFIX
  			       "Vendor \"%6.6s\" System \"%8.8s\" "
  			       "Revision 0x%x has a known ACPI BIOS problem.
  ",
  			       acpi_blacklist[i].oem_id,
  			       acpi_blacklist[i].oem_table_id,
  			       acpi_blacklist[i].oem_revision);
  
  			printk(KERN_ERR PREFIX
  			       "Reason: %s. This is a %s error
  ",
  			       acpi_blacklist[i].reason,
  			       (acpi_blacklist[i].
  				is_critical_error ? "non-recoverable" :
  				"recoverable"));

  
  			blacklisted = acpi_blacklist[i].is_critical_error;
  			break;

  		} else {

  			i++;
  		}
  	}

  	(void)early_acpi_osi_init();
  	dmi_check_system(acpi_rev_dmi_table);

  	return blacklisted;
  }

  #ifdef CONFIG_DMI

  #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
  static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
  {
  	printk(KERN_NOTICE PREFIX "DMI detected: %s (force ACPI _REV to 5)
  ",
  	       d->ident);
  	acpi_rev_override_setup(NULL);
  	return 0;
  }
  #endif

  static struct dmi_system_id acpi_rev_dmi_table[] __initdata = {

  #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
  	/*
  	 * DELL XPS 13 (2015) switches sound between HDA and I2S
  	 * depending on the ACPI _REV callback. If userspace supports
  	 * I2S sufficiently (or if you do not care about sound), you
  	 * can safely disable this quirk.
  	 */
  	{
  	 .callback = dmi_enable_rev_override,
  	 .ident = "DELL XPS 13 (2015)",
  	 .matches = {
  		      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
  		      DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
  		},
  	},
  #endif

  	{}
  };
  
  #endif /* CONFIG_DMI */